阅读说明：本技术 一种用于锅炉给水系统的智能制氨及加氨系统 (Intelligent ammonia production and addition system for boiler water supply system ) 是由 朱志刚 于 2021-08-25 设计创作，主要内容包括：本发明提供了一种用于锅炉给水系统的智能制氨及加氨系统,包括控制系统、氨水制备系统、气体呼吸器和加氨系统,控制系统具有可编程控制器,氨水制备系统包括相互连通的氨水制备器和氨水存储罐,在氨水制备器和氨水存储罐上设有氨气逃逸呼吸口和除盐水进口,气体呼吸器具有逃逸氨气进口和除盐水出口,逃逸氨气进口与氨气逃逸呼吸口连通,除盐水出口与除盐水进口连通,加氨系统与氨水制备系统的氨水出口连通,在氨水制备系统上设有液位检测仪和电导率测定仪,可编程控制器根据液位检测仪和电导率测定仪传输的检测信号将氨水的液位和浓度控制在预设值。上述智能制氨及加氨系统能够确保锅炉给水系统安全运行并保证水质的稳定性。(The invention provides an intelligent ammonia production and adding system for a boiler water supply system, which comprises a control system, an ammonia water preparation system, a gas respirator and an ammonia adding system, wherein the control system is provided with a programmable controller, the ammonia water preparation system comprises an ammonia water preparation device and an ammonia water storage tank which are mutually communicated, an ammonia gas escape breathing port and a desalted water inlet are arranged on the ammonia water preparation device and the ammonia water storage tank, the gas respirator is provided with an ammonia gas escape inlet and a desalted water outlet, the ammonia gas escape inlet is communicated with the ammonia gas escape breathing port, the desalted water outlet is communicated with the desalted water inlet, the ammonia adding system is communicated with the ammonia water outlet of the ammonia water preparation system, a liquid level detector and a conductivity tester are arranged on the ammonia water preparation system, and the programmable controller controls the liquid level and the concentration of ammonia water to be preset values according to detection signals transmitted by the liquid level detector and the conductivity tester. The intelligent ammonia production and feeding system can ensure the safe operation of a boiler water supply system and ensure the stability of water quality.)

1. An intelligent ammonia production and feeding system for a boiler water supply system, which is characterized by comprising a control system, an ammonia water preparation system, a gas respirator and a feeding system, wherein the control system is provided with a programmable controller and comprises an ammonia water preparation device and an ammonia water storage tank which are communicated with each other, an ammonia escape breathing port and a desalted water inlet are respectively arranged on the ammonia water preparation device and the ammonia water storage tank, the gas respirator is provided with an escape ammonia gas inlet and a desalted water outlet, the escape ammonia gas inlet of the gas respirator is communicated with the ammonia escape breathing ports of the ammonia water preparation device and the ammonia water storage tank, the desalted water outlet of the gas respirator is communicated with the desalted water inlets of the ammonia water preparation device and the ammonia water storage tank, the feeding system is communicated with the ammonia water outlet of the ammonia water preparation system, and the ammonia water preparation system are provided with a liquid level detector and a conductivity detector which are communicated with the programmable controller, and the programmable controller controls the liquid level and the concentration of the ammonia water in the ammonia water preparation system to preset values according to detection signals transmitted by the liquid level detector and the conductivity tester.

2. The intelligent ammonia production and addition system of claim 1, wherein the ammonia water preparation device is provided with a circulating ammonia water inlet and an ammonia water outlet, the ammonia water storage tank is provided with an ammonia water inlet and an ammonia water outlet, the ammonia water outlet of the ammonia water preparation device is communicated with the ammonia water inlet of the ammonia water storage tank, and the circulating ammonia water inlet of the ammonia water preparation device is communicated with the ammonia water outlet of the ammonia water storage tank so as to circulate the ammonia water between the ammonia water preparation device and the ammonia water storage tank.

3. The intelligent ammonia production and addition system according to claim 2, wherein the ammonia water preparation device comprises a tank body and a cooling jacket arranged outside the tank body, a partition plate is horizontally arranged in the tank body and divides the tank body into a gas distribution chamber and an ammonia water preparation chamber positioned above the gas distribution chamber, an ammonia gas inlet of the ammonia water preparation device is communicated with the gas distribution chamber, a tubular gas distributor is axially arranged on the partition plate, a vortex nozzle assembly is arranged above the tubular gas distributor, and the vortex nozzle assembly is communicated with a circulating ammonia water inlet of the ammonia water preparation device.

4. The intelligent ammonia production and addition system of claim 1, wherein the gas respirator comprises a tank body, a sieve plate type gas distributor is arranged in the tank body, the sieve plate type gas distributor divides the tank body into a gas distribution chamber and an absorption chamber positioned above the gas distribution chamber, a vortex nozzle assembly is arranged in the absorption chamber, and the vortex nozzle assembly is communicated with the demineralized water inlet of the gas respirator.

5. The intelligent ammonia production and addition system of claim 3 or 4, wherein the vortex nozzle assembly comprises an annular pipeline and a vortex nozzle arranged on the annular pipeline, the vortex nozzle is communicated with the annular pipeline, and the vortex nozzle comprises a plurality of direct nozzles and side-jet nozzles which are arranged at intervals.

6. The intelligent ammonia production and addition system according to claim 1, wherein a demineralized water electric regulating valve and an ammonia electric regulating valve are respectively arranged at a demineralized water inlet and an ammonia inlet of the ammonia water preparation device, the liquid level detector detects an ammonia water liquid level signal in the ammonia water preparation system in real time and transmits the ammonia water liquid level signal to the programmable controller, the programmable controller controls the demineralized water electric regulating valve to be opened when the ammonia water liquid level is lower than a preset value, and controls the demineralized water electric regulating valve to be closed when the ammonia water liquid level reaches the preset value; the conductivity tester detects the ammonia water concentration signal in the ammonia water preparation system in real time and transmits the ammonia water concentration signal to the programmable controller, and the programmable controller controls the ammonia electric regulating valve to be opened when the ammonia water concentration is lower than a preset value and controls the ammonia electric regulating valve to be closed when the ammonia water concentration reaches the preset value.

7. The system of claim 3, wherein the cooling jacket is provided with a cooling water inlet and a cooling water outlet, the cooling water inlet and the cooling water outlet are respectively provided with a cooling water electric regulating valve, the ammonia water outlet of the ammonia water preparation system is provided with a temperature sensor, the temperature sensor detects the ammonia water temperature signal of the ammonia water outlet in real time and transmits the ammonia water temperature signal to the programmable controller, the programmable controller controls the cooling water electric regulating valve to be opened when the ammonia water temperature is higher than a preset value, and the cooling water electric regulating valve to be closed when the ammonia water temperature reaches the preset value.

8. The system according to claim 1, wherein pressure sensors are respectively disposed on the ammonia water preparation device and the ammonia water storage tank, an ammonia escape breathing electric control valve or a switch valve is disposed on the ammonia escape breathing port pipelines of the ammonia water preparation device and the ammonia water storage tank, the pressure sensors detect pressure signals of the ammonia water preparation device and the ammonia water storage tank in real time and transmit the pressure signals to the programmable controller, and the programmable controller controls the escape ammonia gas breath electric control valve or the switch valve to open when the pressure reaches a preset positive pressure and a preset micro negative pressure.

9. The intelligent ammonia production and addition system according to claim 1, wherein an ammonia gas concentration detector and a vent are arranged on the gas respirator, a vent electric regulating valve is arranged on the vent, the ammonia gas concentration detector detects an ammonia gas concentration signal of the gas respirator in real time and transmits the ammonia gas concentration signal to the programmable controller, and the programmable controller controls the vent electric regulating valve to be opened when the ammonia gas concentration reaches a preset discharge value.

10. The intelligent ammonia production and addition system of claim 1, wherein the ammonia addition system comprises a pH detector, a variable frequency controller and an ammonia addition metering pump, the pH detector detects a feed water pH signal in real time after the ammonia is added in a boiler feed water system pipeline and transmits the feed water pH signal to the programmable controller, the programmable controller outputs a corresponding rotation speed frequency signal to the variable frequency controller according to the feed water pH signal, and the variable frequency controller controls the rotation speed of the ammonia addition metering pump according to the rotation speed frequency signal to change the ammonia addition amount.

Technical Field

The invention relates to the technical field of boiler feed water treatment, in particular to an intelligent ammonia production and addition system for a boiler feed water system.

Background

The boiler is an energy conversion device bearing a certain working pressure, and can be divided into a power plant boiler, an industrial boiler, a domestic boiler and the like according to different functions of the boiler.

The boiler system is provided with a special boiler water supply system, the pH value of the feed water is strictly and accurately controlled in the power plant boiler water supply system, and the corrosion of a feed water pipeline and the damage of a metal surface protective film can be effectively prevented; otherwise, the corrosion can corrode parts of a boiler water supply system, corrosive substance iron oxide can enter a boiler and deposit or attach on the wall and the heated surface of the boiler to form indissolvable and poor heat transfer iron scale, and the corrosion can cause pit generation on the inner wall of the pipeline and increase the resistance coefficient. When the pipeline is seriously corroded, even pipeline explosion accidents can happen.

At present, in the commonly adopted alkaline operation mode of a power generation boiler water supply system, in order to prevent and reduce the corrosion of water supply to metal materials, the water supply ammonia adding treatment is carried out in addition to the minimization of dissolved oxygen of the water supply, the pH value of the water supply is controlled, and the corrosion speed of a water pipeline and metal is controlled in a lower range.

The ammonia water adopted by the chemical ammonia-adding of the boiler water supply system of domestic enterprises is obtained from commercial 25-40% ammonia water by mass percent, and is manually prepared into the ammonia water with the mass percent of about 1% after being mixed and diluted by desalted water. The existing method for adding the ammonia water by adopting simple manual control can cause the problems of unstable ammonia water concentration control and the like, so that the system is easy to corrode and scale, the medicament waste phenomenon is serious, and the water treatment effect is not ideal. In addition, as the ammonia water has strong pungent smell, the preparation personnel work in the environment of the ammonia water for a long time, the workload of the preparation personnel is increased, and the physical health of the personnel is seriously harmed.

In view of this, the invention is particularly proposed.

Disclosure of Invention

The invention aims to provide an intelligent ammonia production and addition system for a boiler water supply system, which can ensure the safe operation of the boiler water supply system and the stability of water quality.

The invention provides an intelligent ammonia production and adding system for a boiler water supply system, which comprises a control system, an ammonia water preparation system, a gas respirator and an ammonia adding system, wherein the control system is provided with a programmable controller, the ammonia water preparation system comprises an ammonia water preparation device and an ammonia water storage tank which are communicated with each other, an ammonia escape breathing port and a desalted water inlet are respectively arranged on the ammonia water preparation device and the ammonia water storage tank, the gas respirator is provided with an escape ammonia gas inlet and a desalted water outlet, the escape ammonia gas inlet of the gas respirator is communicated with the ammonia escape breathing ports of the ammonia water preparation device and the ammonia water storage tank, the desalted water outlet of the gas respirator is communicated with the ammonia water preparation device and the desalted water inlet of the ammonia water storage tank, the ammonia adding system is communicated with the ammonia water outlet of the ammonia water preparation system, and the ammonia water preparation system is provided with a liquid level detector and a conductivity detector which are communicated with the programmable controller, and the programmable controller controls the liquid level and the concentration of the ammonia water in the ammonia water preparation system to preset values according to detection signals transmitted by the liquid level detector and the conductivity tester.

Further, be equipped with circulation aqueous ammonia import and aqueous ammonia export on aqueous ammonia preparation ware, be equipped with aqueous ammonia import and aqueous ammonia export on aqueous ammonia storage jar, the aqueous ammonia export of aqueous ammonia preparation ware and the aqueous ammonia import intercommunication of aqueous ammonia storage jar, the circulation aqueous ammonia import of aqueous ammonia preparation ware and the aqueous ammonia export intercommunication of aqueous ammonia storage jar are so that the aqueous ammonia circulates between aqueous ammonia preparation ware and aqueous ammonia storage jar.

Further, the ammonia water preparation device comprises a tank body and a cooling jacket arranged on the outer side of the tank body, a partition plate is horizontally arranged in the tank body and divides the tank body into an air distribution chamber and an ammonia water preparation chamber located above the air distribution chamber, an ammonia gas inlet of the ammonia water preparation device is communicated with the air distribution chamber, a tubular gas distributor is axially arranged on the partition plate, a vortex nozzle assembly is arranged above the tubular gas distributor, and the vortex nozzle assembly is communicated with a circulating ammonia water inlet of the ammonia water preparation device.

Further, the gas respirator comprises a tank body, a sieve plate type gas distributor is arranged in the tank body, the sieve plate type gas distributor divides the tank body into a gas distribution chamber and an absorption chamber located above the gas distribution chamber, a vortex nozzle assembly is arranged in the absorption chamber, and the vortex nozzle assembly is communicated with a demineralized water inlet of the gas respirator.

Further, the vortex nozzle assembly comprises an annular pipeline and a vortex nozzle arranged on the annular pipeline, the vortex nozzle is communicated with the annular pipeline, and the vortex nozzle comprises a plurality of direct injection nozzles and side injection nozzles which are arranged at intervals.

Furthermore, a desalted water electric regulating valve and an ammonia gas electric regulating valve are respectively arranged at a desalted water inlet and an ammonia gas inlet of the ammonia water preparation device, a liquid level detector detects ammonia water liquid level signals in the ammonia water preparation system in real time and transmits the ammonia water liquid level signals to a programmable controller, the programmable controller controls the desalted water electric regulating valve to be opened when the ammonia water liquid level is lower than a preset value, and controls the desalted water electric regulating valve to be closed when the ammonia water liquid level reaches the preset value; the conductivity tester detects the ammonia water concentration signal in the ammonia water preparation system in real time and transmits the ammonia water concentration signal to the programmable controller, and the programmable controller controls the ammonia electric regulating valve to be opened when the ammonia water concentration is lower than a preset value and controls the ammonia electric regulating valve to be closed when the ammonia water concentration reaches the preset value.

Furthermore, a cooling water inlet and a cooling water outlet are arranged on the cooling jacket, a cooling water electric regulating valve is respectively arranged at the cooling water inlet and the cooling water outlet, a temperature sensor is arranged at the ammonia water outlet of the ammonia water preparation system, the temperature sensor detects the ammonia water temperature signal of the ammonia water outlet in real time and transmits the ammonia water temperature signal to the programmable controller, the programmable controller controls the cooling water electric regulating valve to open when the ammonia water temperature is higher than a preset value, and controls the cooling water electric regulating valve to close when the ammonia water temperature reaches the preset value.

Further, pressure sensors are respectively arranged on the ammonia water preparation device and the ammonia water storage tank, an ammonia escape breathing electric regulating valve or a switch valve is arranged on ammonia escape breathing port pipelines of the ammonia water preparation device and the ammonia water storage tank, the pressure sensors detect pressure signals of the ammonia water preparation device and the ammonia water storage tank in real time and transmit the pressure signals to a programmable controller, and the programmable controller controls the escape ammonia gas breathing electric regulating valve or the switch valve to be opened when the pressure reaches a preset positive pressure and a preset micro negative pressure.

And further, an ammonia concentration detector and a vent are arranged on the gas respirator, a vent electric regulating valve is arranged on the vent, the ammonia concentration detector detects the ammonia concentration signal of the gas respirator in real time and transmits the ammonia concentration signal to the programmable controller, and the programmable controller controls the vent electric regulating valve to be opened when the ammonia concentration reaches a preset discharge value.

Furthermore, the ammonia adding system comprises a pH value detector, a variable frequency controller and an ammonia adding metering pump, wherein the pH value detector detects a water supply pH value signal after ammonia is added in a boiler water supply system pipeline in real time and transmits the water supply pH value signal to the programmable controller, the programmable controller outputs a corresponding rotating speed frequency signal to the variable frequency controller according to the water supply pH value signal, and the variable frequency controller controls the rotating speed of the ammonia adding metering pump according to the rotating speed frequency signal so as to change the ammonia adding amount.

The intelligent ammonia production and feeding system is provided with an ammonia water preparation device and an ammonia water storage tank which are communicated with each other in the ammonia water preparation system, the ammonia water preparation system is provided with a liquid level detector and a conductivity tester, and a programmable controller controls the liquid level and the concentration of the ammonia water in the ammonia water preparation system to be preset values according to detection signals transmitted by the liquid level detector and the conductivity tester, so that the consistency of the concentration of the ammonia water solution prepared each time can be ensured, the ammonia water solution preparation and feeding operation is more advanced and reliable, the stable operation of the boiler water feeding and feeding system is facilitated, the intelligent automatic control of the ammonia production and feeding operation is realized, the system has excellent processing capacity and various communication options, the defects of equipment damage, energy waste and the like caused by the inaccurate manual feeding are thoroughly overcome, the labor is saved, the consumption is reduced, and the safety of the boiler water feeding system is ensured, The method has obvious advantages in the aspects of ensuring the stability of water quality and the like, and has good economic and social benefits.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.

FIG. 1 is a schematic structural diagram of an intelligent ammonia production and addition system for a boiler feedwater system according to the present invention;

FIG. 2 is a schematic view of the connection structure of the control system of the present invention with an ammonia water preparation device and an ammonia water storage tank;

FIG. 3 is a schematic view of the connection structure of the control system and the ammonia addition system according to the present invention;

FIG. 4 is a schematic structural diagram of a control system according to the present invention;

FIG. 5 is a schematic view of the structure of an ammonia water preparation apparatus according to the present invention;

FIG. 6 is a schematic structural view of a partition plate of the ammonia water preparation apparatus of the present invention;

FIG. 7 is a schematic structural view of a tubular gas distributor according to the present invention;

FIG. 8 is a side view of the vortex nozzle assembly of the present invention;

FIG. 9 is a bottom view of the vortex nozzle assembly of the present invention;

FIG. 10 is a top view of the vortex nozzle assembly of the present invention;

fig. 11 is a schematic view of the ammonia water storage tank of the present invention;

FIG. 12 is a schematic structural view of a gas respirator of the present invention;

FIG. 13 is a schematic diagram of a gas distributor of the present invention.

Description of reference numerals:

1: a control system; 101: a programmable controller; 102: a conductivity meter control module; 103: a pH value detector control module; 104: a liquid level detector control module; 105: a pressure sensor control module; 106: an ammonia water circulating pump control module; 107: an electric regulating valve control module; 108: an electric switch valve control module; 109: a display;

2: an ammonia water preparation device; 201: a tank body; 202: a cooling jacket; 203: a partition plate; 204: a gas distribution chamber; 205: an ammonia water preparation chamber; 206: a tubular gas distributor; 207: a vortex nozzle assembly; 208: an ammonia gas inlet; 209: a demineralized water inlet; 210: an ammonia water outlet; 211: ammonia escapes from the breathing port; 212: a sewage draining outlet; 213: a cooling water inlet; 214: a cooling water outlet; 215: a circulating ammonia water inlet; 216: mounting holes; 217: an annular duct; 218: a swirl nozzle;

3: an ammonia water storage tank; 301: a tank body; 302: ammonia escapes from the breathing port; 303: an ammonia water inlet; 304: an ammonia water outlet; 305: an ammonia water circulating pump; 306: a liquid level detector; 307: a demineralized water inlet; 308: a conductivity meter;

4: a gas respirator; 401: a tank body; 402: a sieve plate gas distributor; 403: a gas distribution chamber; 404: an absorption chamber; 405: a vortex nozzle assembly; 406: a vent port; 407: a demineralized water inlet; 408: a demineralized water outlet; 409: an escape ammonia gas inlet; 410: an ammonia gas concentration detector;

5: an ammonia addition system; 501: a pH value detector; 502: a variable frequency controller; 503: adding an ammonia metering pump;

6: boiler feed water system piping; 601: a feed pump; 602: adding ammonia: 603: sampling points.

Detailed Description

It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the disclosure. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms also include the plural forms unless the context clearly dictates otherwise, and further, it is understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of the stated features, steps, operations, devices, components, and/or combinations thereof.

The technical solutions of the present invention will be described clearly and completely with reference to the following embodiments, and it should be understood that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Example 1

Referring to fig. 1 to 13, the intelligent ammonia production and addition system for a boiler water supply system provided in this embodiment includes a control system 1, an ammonia water preparation system, a gas respirator 4, and an addition system 5; the control system 1 is provided with a programmable controller 101, the ammonia water preparation system comprises an ammonia water preparation device 2 and an ammonia water storage tank 3 which are communicated with each other, an ammonia gas escape breathing port 211, an ammonia gas escape breathing port 302, a demineralized water inlet 209 and a demineralized water inlet 307 are respectively arranged on the ammonia water preparation device 2 and the ammonia water storage tank 3, the gas respirator 4 is provided with a demineralized water inlet 407, a demineralized water outlet 408 (also an ammonia gas absorption liquid outlet) and an escape ammonia gas inlet 409, the escape ammonia gas inlet 409 is communicated with the ammonia gas escape breathing port 211 and the ammonia gas escape breathing port 302, the demineralized water outlet 408 is communicated with the demineralized water inlet 209 and the demineralized water inlet 307, the ammonia adding system 5 is communicated with the ammonia water outlet of the ammonia water preparation system, the ammonia water preparation system is provided with a liquid level detector 306 and a conductivity tester 308 which are in communication connection with the programmable controller 101, and the programmable controller 101 is used for detecting the liquid level and the liquid level of the ammonia water in the ammonia water preparation system and the conductivity tester 308 according to detection signals of the liquid level detector 306 and the conductivity tester 308 The concentration is controlled at a preset value.

As shown in fig. 4, the control system 1 includes a programmable controller 101, and a conductivity meter control module 102, a pH detector control module 103, a liquid level detector control module 104, a pressure sensor control module 105, an ammonia water circulation pump control module 106, an electric regulating valve control module 107, an electric on-off valve control module 108, and a display 109 connected thereto; wherein, control system 1 can set up to automatic preparation of aqueous ammonia and intelligent ammoniation automatic control cabinet, and display 109 can adopt intelligent LED dot matrix display screen. The control system 1 controls each control module through the programmable controller 101, and further realizes the control functions of the ammonia water preparation device 2, the ammonia water storage tank 3, the gas respirator 4 and the ammonia adding system 5.

As shown in fig. 5, the ammonia water preparation device 2 includes a tank 201 and a cooling jacket 202 disposed outside the tank 201, a partition plate 203 is horizontally disposed in the tank 201, the partition plate 203 divides the tank 201 into a gas distribution chamber 204 and an ammonia water preparation chamber 205 located above the gas distribution chamber 204, an ammonia gas inlet 208 of the ammonia water preparation device 2 is communicated with the gas distribution chamber 204, a tubular gas distributor 206 is axially disposed on the partition plate 203, a vortex nozzle assembly 207 is disposed above the tubular gas distributor 206, and the vortex nozzle assembly 207 is communicated with a circulating ammonia water inlet 215 of the ammonia water preparation device 2.

More specifically, an ammonia gas inlet 208 communicated with the gas distribution chamber 204 is arranged on one side of the lower end of the tank 201, a demineralized water inlet 209 communicated with the ammonia water preparation chamber 205 is arranged on the other side of the lower end of the tank 201, a sewage discharge outlet 212 communicated with the gas distribution chamber 204 is arranged at the bottom end of the tank 201, a circulating ammonia water inlet 215 communicated with the vortex nozzle assembly 207 is arranged on one side of the upper end of the tank 201, an ammonia water outlet 210 communicated with the ammonia water storage tank 3 is arranged on the other side of the upper end of the tank 201, and an ammonia gas escape breathing port 211 communicated with the gas respirator 4 is arranged at the top end of the tank 201.

In addition, an ammonia gas inlet pipe communicated with the ammonia gas inlet 208 is arranged at the bottom of the tank 201, and an electric regulating valve is arranged on the ammonia gas inlet pipe; a desalted water inlet pipe communicated with the desalted water inlet 209 is arranged on one side of the lower part of the tank body 201, and an electric regulating valve is arranged on the desalted water inlet pipe; an outlet pipe communicated with the ammonia water outlet 210 is arranged outside the upper end of the tank body 201, and an electric switch valve is arranged on the outlet pipe; a pipeline communicated with the ammonia escape breathing port 211 is arranged at the upper end of the tank body 201 and is communicated with the gas respirator 4; a sewage discharge pipeline communicated with the sewage discharge port 212 is arranged at the bottom end of the tank body 201, and a manual valve is arranged on the sewage discharge pipeline.

As shown in fig. 6, a mounting hole 216 for axially mounting the tube gas distributor 206 may be provided in the partition plate 203, and the mounting hole 216 may be, for example, an internally threaded hole, and the tube gas distributor 206 may be screwed to the partition plate 203 through the mounting hole 216. The number of the tubular gas distributors 206 is not limited strictly, and may be set reasonably according to the preparation amount of ammonia water in a limited time, for example, a plurality of tubular gas distributors 206 may be provided, and a plurality of tubular gas distributors 206 may be distributed uniformly on the partition plate 203.

As shown in fig. 7, the tubular gas distributor 206 may be a hydrophobic hollow cylinder made of pure ptfe through high-temperature and high-pressure sintering, and has a closed blind end at one end and a threaded interface at the other end for mating with the internal threads of the partition 203. The tubular gas distributor 206 has the characteristic that only gas can pass but water cannot pass, meanwhile, the polytetrafluoroethylene raw material has the porosity characteristic of more than 50% after being sintered at high temperature and high pressure, has strong acid and alkali resistance, simultaneously has high strength and toughness, can operate for a long time at the temperature of-50 ℃ to +200 ℃, has the dual functions of uniform distribution and fine filtration, and has high filtration precision and high porosity, so that the same filtration area has larger fluid flow, and the distributor has better fluid flow under the working condition of high filtration precision. In addition, the inside and outside surface of tubular gas distributor 206 is as smooth as "wax system", so impurity is difficult for hanging on the distributor surface, and surface filter fineness is high simultaneously, and inlayer filter fineness is low, and it is internal that impurity is difficult for imbedding the distributor, and the distributor washs easily and washs thoroughly, and the cleaning performance is excellent, and then long service life.

The tubular gas distributor 206 diffuses gas from inside to outside into fine and uniform bubbles based on the characteristics of high air permeability, micropores and the like formed by sintering pure polytetrafluoroethylene materials, greatly improves the gas-liquid mass transfer specific surface area, is favorable for gas-liquid contact, and enables ammonia gas to be quickly dissolved in desalted water to form an ammonia water solution; meanwhile, the tubular gas distributor 206 formed by sintering polytetrafluoroethylene also has an excellent function of filtering micro particle impurities and oil stains in ammonia gas, and all indexes in an ammonia water solution prepared from the filtered ammonia gas meet the requirement of analyzing pure ammonia water in GB/T631-2007 chemical reagent ammonia water.

More importantly, tubular gas distributor 206 has excellent hydrophobic properties, which are determined by the hydrophobic chemical composition, microstructure and surface topography of the polytetrafluoroethylene material, which makes the contact angle of water much larger than 90 °, and highlights the surface tension of water, so that better gas permeability and hydrophobicity are unified, thereby forming a hydrophobic (also oleophobic), anti-pollution and self-cleaning nano-characteristic surface. The ammonia forms even small bubbles after penetrating through the wall body of the tubular gas distributor 206 and enters the demineralized water, and meanwhile, the hydrophobic characteristic of the distributor completely prevents the demineralized water from flowing back to enter the distributor, so that the gas-liquid mass transfer specific surface area is improved, the gas-liquid mass transfer process inside the ammonia water preparation device 2 is favorably strengthened, and the speed of dissolving the ammonia in the demineralized water is favorably improved. The tubular gas distributor 206 can block the ammonia solution in the absorption chamber, so that the ammonia solution cannot pass through and enter the gas distribution chamber 204 below the partition plate 203, and thus liquid and particle impurities in the ammonia gas are filtered and then sink to the bottom end of the gas distribution chamber 204 and finally discharged through the sewage outlet 212.

Referring to fig. 8 to 10, the vortex nozzle assembly 207 includes an annular duct 217 and a vortex nozzle 218 disposed in the annular duct 217, the vortex nozzle 218 communicating with the annular duct 217, the vortex nozzle 218 including a plurality of direct nozzles and side-firing nozzles disposed at intervals. The vortex nozzle 218 is installed on a horizontally disposed annular pipe 217, and the upper portion of the annular pipe 217 is communicated with the circulating ammonia water inlet 215 through a circulating pipe. The plurality of direct injection nozzles and side injection nozzles are respectively arranged on the annular pipeline 217 according to the sequence of direct injection, side injection, direct injection and side injection, the side injection nozzles form an angle of 35-45 degrees with the vertical plane, demineralized water (which is a mixed liquid passing through the gas respirator 4 and ammonia gas absorption liquid thereof) forms high-speed jet flow through the spray holes of the vortex nozzle 218, low-pressure areas are generated around the vortex nozzle 218 to form a siphoning phenomenon, and the liquid around the nozzles is sucked into the high-speed jet flow of the vortex nozzle 218 under the action of pressure difference to drive a large amount of liquid to circulate to form self-stirring and comprehensively contact and fuse with the ammonia gas distributed at low speed and scattered flow to form ammonia water, so that the ammonia gas is more easily absorbed by the demineralized water, and the concentration of the ammonia water solution is more uniform.

A cooling water inlet 213 is arranged on one side of the lower part of the cooling jacket 202 arranged on the outer side of the tank body 201, a cooling water outlet 214 is arranged on the upper part of the other side, and heat generated by mixing ammonia gas and desalted water in the ammonia water preparation device 2 is taken away through circulating cooling water in the cooling jacket 202 on the outer side of the tank body 201, so that ammonia gas absorption is prevented from being slowed down due to the rise of the temperature of the ammonia water solution, the temperature of the ammonia water outlet can be kept below 35 ℃ in the continuous preparation process of the ammonia water solution, and the safety of equipment is ensured.

As shown in fig. 11, the ammonia water storage tank 3 includes a tank 301, electrodes of a conductivity meter 308 are disposed in the tank 301, a liquid level detector 306 is disposed outside the tank 301, the liquid level detector 306 may be a float level meter, for example, an ammonia gas escape breathing port 302 is disposed at an upper end of the tank 301, and a demineralized water inlet 307, an ammonia water inlet 303, and an ammonia water outlet 304 are disposed on a side surface of the tank. The ammonia water inlet 303 is connected with the ammonia water outlet 210 of the ammonia water preparation device 2 through a pipeline, and is used for forced circulation when the ammonia water preparation device 2 prepares ammonia water and storage of finished ammonia water in the ammonia water storage tank 3; an ammonia water outlet 304 arranged at the lower end of the tank body 301 is connected to an ammonia adding metering pump 503 of a boiler water supply system through a pipeline and used for adding ammonia water into the boiler water supply system.

An ammonia water circulating pipeline is arranged between the ammonia water preparation device 2 and the ammonia water storage tank 3, and ammonia water circulates between the ammonia water preparation device 2 and the ammonia water storage tank 3 through the ammonia water circulating pipeline. Specifically, the aqueous ammonia export 210 of aqueous ammonia preparation ware 2 communicates with the aqueous ammonia import 303 of aqueous ammonia storage jar 3, the aqueous ammonia export 304 of aqueous ammonia storage jar 3 lower extreme communicates with the circulation aqueous ammonia import 215 of aqueous ammonia preparation ware 2 simultaneously, be equipped with aqueous ammonia circulating pump 305 on aqueous ammonia circulating line, an aqueous ammonia forced circulation between aqueous ammonia preparation ware 2 and aqueous ammonia storage jar 3, thereby make the inside ammonia and water mixture of aqueous ammonia preparation ware 2 more even, it is quick, make the concentration of aqueous ammonia solution keep unanimous throughout in the whole aqueous ammonia preparation system, and send finished product aqueous ammonia into aqueous ammonia storage jar 3 finally and store.

The bottom end of the ammonia water inlet 303 side of the ammonia water storage tank 3 is provided with an electrode of a conductivity tester 308, and the electrode is connected with the programmable controller 101 of the control system 1 by a special electrode cable and is used for measuring the concentration of the prepared ammonia water. A liquid level detector 306 is arranged on one side of the ammonia water storage tank 3, is connected with the programmable controller 101 of the control system 1 by a special cable, and is used for detecting the liquid level in the ammonia water storage tank 3.

A demineralized water electric regulating valve and an ammonia electric regulating valve are respectively arranged at a demineralized water inlet 209 and an ammonia inlet 208 of the ammonia water preparation device 2, a liquid level detector 306 detects an ammonia water liquid level signal in the ammonia water storage tank 3 in real time and transmits the ammonia water liquid level signal to the programmable controller 101, the programmable controller 101 controls the demineralized water electric regulating valve to be opened when the ammonia water liquid level is lower than a preset value, and controls the demineralized water electric regulating valve to be closed when the ammonia water liquid level reaches the preset value; the conductivity measuring instrument 308 detects an ammonia water concentration signal in the ammonia water storage tank 3 in real time and transmits the ammonia water concentration signal to the programmable controller 101, the programmable controller 101 controls the ammonia electric regulating valve to be opened when the ammonia water concentration is lower than a preset value, and controls the ammonia electric regulating valve to be closed when the ammonia water concentration reaches the preset value.

A cooling water inlet 213 and a cooling water outlet 214 are arranged on a cooling jacket 202 of the ammonia water preparation device 2, a cooling water electric regulating valve is arranged on the cooling water inlet 213 and the cooling water outlet 214, a temperature sensor (not shown) is arranged at an ammonia water outlet 304 of the ammonia water storage tank 3, the temperature sensor detects an ammonia water temperature signal of ammonia water outlet water in real time and transmits the ammonia water temperature signal to the programmable controller 101, the programmable controller 101 controls the cooling water electric regulating valve to be opened when the ammonia water temperature is higher than a preset value, and controls the cooling water electric regulating valve to be closed when the ammonia water temperature reaches the preset value.

Pressure sensors (not shown) are respectively arranged on the ammonia water preparation device 2 and the ammonia water storage tank 3, ammonia gas escape breathing hole 211 and ammonia gas escape breathing hole 302 are respectively provided with an ammonia gas escape breathing electric regulating valve or a switch valve, the pressure sensors detect pressure signals of the ammonia water preparation device 2 and the ammonia water storage tank 3 in real time and transmit the pressure signals to the programmable controller 101, and the programmable controller 101 controls the ammonia gas escape breathing electric regulating valve or the switch valve to be opened when the pressure reaches a preset positive pressure and a preset micro negative pressure.

As shown in fig. 12, the gas respirator includes a tank 401, a sieve plate type gas distributor 402 is provided in the tank 401, the sieve plate type gas distributor 402 divides the tank 401 into a gas dividing chamber 403 and an absorption chamber 404 located above the gas dividing chamber 403, and a vortex nozzle assembly 405 is provided in the absorption chamber 404. A vent 406 is arranged at the top of the tank body 401, a demineralized water inlet 407 and a demineralized water outlet 408 are arranged at one side of the tank body 401, and an escape ammonia gas inlet 409 is arranged at the bottom of the tank body 401.

The sieve plate type gas distributor 402 is horizontally arranged below the interior of the tank body 401, the periphery of the sieve plate type gas distributor is hermetically connected with the tank body 401, and the interior of the tank body 401 is divided into a gas distribution cavity 403 positioned below and an absorption cavity 404 positioned above. As shown in fig. 13, the sieve plate type gas distributor 402 is uniformly provided with small holes with a diameter of about 0.05mm, which can uniformly distribute the gas entering the gas distribution chamber 403, and the gas passes through the small holes of the sieve plate type gas distributor 402 to form bubbles in the desalted water, thereby greatly improving the gas-liquid mass transfer specific surface area, accelerating the absorption speed of the ammonia gas by the desalted water, and purifying the exhaled gas containing ammonia gas.

The demineralized water inlet 407 is connected with a demineralized water pipeline, and an electric regulating valve is arranged at the inlet of the demineralized water pipeline; an ammonia escape inlet 409 at the bottom of the tank body 401 is connected with an ammonia escape breathing port 211 and an ammonia escape breathing port 302 of the ammonia water preparation device 2 and the ammonia water storage tank 3, ammonia escaping from the ammonia water preparation device 2 and the ammonia water storage tank 3 enters a gas distribution chamber 403 in the tank body 401 and is conveyed in a continuous alternate conveying mode through sieve holes of a sieve plate type gas distributor 402, so that the mixed gas and the desalted water are uniformly mixed in a short time, and the ammonia in the mixed gas is favorably and rapidly absorbed by the desalted water; the demineralized water outlet 408 is connected with the ammonia water preparation device 2 and the demineralized water inlet 209 and the demineralized water inlet 307 of the ammonia water storage tank 3 through pipelines, and an electric regulating valve is arranged at the demineralized water outlet 408; the vortex nozzle assembly 405 may be constructed the same as the vortex nozzle assembly 207 of an ammonia preparation machine.

The gas respirator 4 is provided with an ammonia concentration detector 410 and an air vent 406, the air vent 406 is provided with an air vent electric regulating valve and an ammonia concentration detector 410, the ammonia concentration detector 410 detects an ammonia concentration signal of the gas respirator 4 in real time and transmits the ammonia concentration signal to the programmable logic controller 101, and the programmable logic controller 101 controls the air vent electric regulating valve to be opened when the ammonia concentration reaches a preset discharge value. The electronic air-release regulating valve is closed at ordinary times, is opened when air needs to be released, and is opened when air needs to enter.

As shown in fig. 3, the ammonia adding system 5 includes a pH detector 501, a variable frequency controller 502 and an ammonia adding metering pump 503, the ammonia adding metering pump 503 is connected with the variable frequency controller 502, an electrode probe of the pH detector 501 and the variable frequency controller 502 are respectively connected with the programmable controller 101, and a motor of the ammonia adding metering pump 503 is driven by the variable frequency controller 502 to inject ammonia water into the boiler water supply system. The pH value detector 501 detects the pH value signal of the feed water added with ammonia in the boiler feed water system pipeline 6 in real time and transmits the pH value signal to the programmable controller 101, the programmable controller 101 outputs a corresponding rotating speed frequency signal to the variable frequency controller 502 according to the pH value signal of the feed water, and the variable frequency controller 502 controls the rotating speed of the ammonia adding metering pump 503 according to the rotating speed frequency signal so as to change the ammonia adding amount.

In the operation process, the pH value detector 501 detects the pH value of the make-up water in the boiler water supply main pipe, a standard 4-20mA direct current signal is output to the programmable controller 101 of the control system 1, the programmable controller 101 compares the detected value of the pH value detector 501 with a control set value and performs PID operation, then a signal is output to the control frequency converter 502, the control frequency converter 502 outputs frequency according to the output signal to enable the frequency to change within the range of 0-50Hz, when the pH value detected by the pH value detector 501 is smaller than the set value and exceeds a neutral zone, the output frequency of the frequency converter 502 is increased, the rotating speed of a motor of an alternating current motor of the ammonia dosing pump 503, which is supplied by a three-phase alternating current power supply, is increased gradually, and the pH value of a boiler water supply system returns to the set range; on the contrary, when the measured pH value is larger than the set value and exceeds the neutral zone, the variable frequency controller 502 controls the output frequency to be reduced along with the time, the motor rotating speed of the alternating current motor of the three-phase alternating current power supply for the ammonia adding metering pump 503 is reduced, thereby gradually reducing the ammonia adding amount and also enabling the pH value of the boiler water supply system to return to the set range.

The electrode probe of the pH value detector 501 can be arranged at about 5m downstream of the ammonia adding point 602 of the boiler feed water system pipeline 6, so that the phenomenon that the transition process time is too long due to too long distance between the ammonia adding point 602 and the sampling point 603 of the electrode probe of the pH value detector 501 can be avoided, and the ammonia adding process has larger pure delay, thereby influencing the quality of adjusting the pH value of boiler feed water. In addition, the position for adding ammonia into the boiler water supply system pipeline can be arranged in front of the inlet of the water supply pump 601, so that the added ammonia water solution can be quickly mixed with the desalted water, and the authenticity and the representativeness of the electrode probe sampling after the water supply pump 601 are guaranteed.

In the above-mentioned intelligence system ammonia and ammoniation system, control system 1 comprises aqueous ammonia solution automatic preparation control system and automatic ammoniation control system, and two systems realize decentralized control and centralized management by programmable controller 101, can carry out the data display of process variables and configuration such as chinese and western, figure, liquid level, pressure, concentration, pH value, conductivity, time, temperature through intelligent LED dot matrix display screen, can also carry out man-machine conversation simultaneously in order to realize intelligent control.

The automatic preparation control program of the ammonia water solution is as follows: the liquid level detector 306 communicates a liquid level electric signal of the ammonia water storage tank 3 to the programmable controller 101, when the liquid level is lower than a set value, the programmable controller 101 sends a command signal for opening an electric regulating valve of a desalted water inlet, an electric actuator enters a working state, the opening degree of the regulating valve is opened according to the command signal, the desalted water enters the ammonia water preparation device 2, meanwhile, the programmable controller 101 commands an ammonia water circulating pump to work, under the action of the ammonia water circulating pump 305, the liquid levels of the ammonia water preparation device 2 and the ammonia water storage tank 3 reach a set upper limit, and the programmable controller 101 commands to close the electric regulating valve of the desalted water inlet; the conductivity meter 308 communicates the detected value to the programmable controller 101, the concentration of the solution in the ammonia water storage tank 3 is lower than the set value, the programmable controller 101 sends an opening instruction signal of the electric regulating valve of the ammonia gas inlet, the electric actuator enters a working state, and the opening degree of the regulating valve is opened according to the instruction signal, the ammonia gas enters the gas distribution chamber 204 of the ammonia water preparation device 2, the granular impurities and the oil stains are filtered by a tubular gas distributor 206 and then enter an ammonia water preparation chamber 205 from bottom to top, vertically intersected with the desalted water sprayed from top to bottom by the vortex nozzle assembly 207, the ammonia gas is absorbed by the desalted water and mixed into ammonia water, heat is released, under the action of the ammonia water circulating pump, the desalted water circulates between the ammonia water preparation device 2 and the ammonia water storage tank 3 repeatedly, ammonia gas is absorbed continuously, the concentration of the ammonia water reaches a set value, the programmable controller 101 commands the closing of the ammonia inlet electroregulating valve and the ammonia circulation pump 305.

The working procedures of the ammonia water preparation system are as follows: the ammonia gets into gas distribution chamber 204 through ammonia import 208, get into to establish inside the tubular gas distributor 206 on baffle 203, pass distributor hollow cylinder wall micropore, after filtering and getting rid of particle impurity and greasy dirt in the ammonia, form tiny even bubble, get into the aqueous ammonia preparation chamber 205 of jar body 201 top, tiny even ammonia bubble that is distributed by tubular gas distributor 206 at aqueous ammonia preparation chamber 205, intersect perpendicularly with the demineralized water that sprays, improve gas-liquid mass transfer specific surface area greatly, accelerate the ammonia and be absorbed by the full gas of demineralized water, improve aqueous ammonia preparation speed, the ammonia emits the heat when dissolving in water. A temperature sensor is arranged on a pipeline of the ammonia water outlet 210, the ammonia water outlet 210 is connected with the ammonia water storage tank 3 through a pipeline, and the ammonia water solution in the ammonia water preparation device 2 is subjected to the circulating action of an ammonia water circulating pump 305, so that the solution concentration and the liquid level of the ammonia water preparation device 2 and the ammonia water storage tank 3 are balanced; the ammonia escape breathing port 211 at the upper end of the tank body 201 is connected with the gas respirator 4, and exhaled or inhaled gas enters or is discharged from the ammonia water preparation device 2 and the ammonia water storage tank 3 of the ammonia water preparation system through the gas respirator 4, so that the internal and external pressures of the ammonia water preparation device 2 and the ammonia water storage tank 3 are balanced, and the safe operation of the ammonia water preparation device 2 and the ammonia water storage tank 3 is protected.

The working procedure of the cooling water of the ammonia water preparation device 2 is as follows: the cooling water is accessed with cooling water inlet 213 through circulating water pump outlet, and the forced circulation that circulating water pump import and cooling water outlet 214 accessed mixes ammonia and water and emits the heat exchange that transmits for aqueous ammonia preparation ware 2 shell and takes away, can not absorb the slow down because of the ammonia that solution temperature rose in the aqueous ammonia preparation ware 2 caused, makes the temperature of aqueous ammonia outlet 210 below 35 ℃ all the time, guarantees that the system operation is stable and safe.

The automatic control program of the cooling water is as follows: when the numerical value detected by the temperature sensor is communicated to the programmable controller 101, when the temperature of the ammonia water outlet is higher than a set value, the programmable controller 101 instructs to open the cooling water inlet electric regulating valve and the cooling water outlet electric regulating valve, the cooling water circulating pump operates, and the programmable controller 101 instructs the cooling water circulating pump to stop operating according to the corresponding opening degree of the electric regulating valve instructed by the temperature of the ammonia water outlet and the temperature of the ammonia water outlet according to the set value.

The gas respirator 4 has the following functions:

respiration: the gas respirator 4 is the safety device that maintains the atmospheric pressure balance of aqueous ammonia preparation ware 2 and aqueous ammonia storage jar 3, stop the medium volatilizing, the unordered emission of medium is avoided to the bearing capacity of gas respirator 4 make full use of aqueous ammonia preparation ware 2 and aqueous ammonia storage jar 3 itself, and its principle is that pressure sensor detects numerical communication and gives programmable controller 101, utilizes the exhaust positive pressure and the negative pressure of breathing in of unloading electrical control valve to control aqueous ammonia preparation ware 2 and aqueous ammonia storage jar 3. When the pressure in the ammonia water storage tank 3 is within a set value range, the gas respirator 4 does not work, and the airtightness of the ammonia water preparation device 2 and the ammonia water storage tank 3 is kept; when the desalted water is supplemented into the ammonia water preparation device 2 and the ammonia water storage tank 3, so that the pressure of the upper gas space in the ammonia water preparation device 2 and the upper gas space in the ammonia water storage tank 3 are increased, and the set positive pressure of the respirator is reached, the programmable controller 101 instructs the emptying electric regulating valve to be opened, and the gas escapes from the emptying port 406, so that the pressure in the ammonia water preparation device 2 and the ammonia water storage tank 3 is not increased any more; when the aqueous ammonia in extraction aqueous ammonia storage jar 3 adds ammonia for boiler water supply system, the pressure in the gaseous space in aqueous ammonia storage jar 3 upper portion descends, when reaching the respirator and opening the little negative pressure value of settlement, programmable controller 101 instruction evacuation electrical control valve opens, make external gas get into jar body 401 through drain hole 406, and get into aqueous ammonia preparation ware 2 and aqueous ammonia storage jar 3 through escaping ammonia import 409 through the pipeline, make the pressure in aqueous ammonia preparation ware 2 and aqueous ammonia storage jar 3 no longer continue to descend, make things convenient for the aqueous ammonia extraction and avoid forming the negative pressure, let in the aqueous ammonia storage jar 3 jar with jar external atmospheric pressure balance, the system safety of protection aqueous ammonia preparation ware 2 and aqueous ammonia storage jar 3.

Purification effect: the gas respirator 4 is a purification device which can enable the absorption efficiency of ammonia in the ammonia-containing mixed gas to reach 99.5 percent, and the ammonia in the ammonia escape mixed gas is absorbed to reach the emission standard and then is discharged to the air; the principle is as follows: the ammonia-containing mixed gas from the ammonia escape breathing port 211 of the ammonia water preparation device 2 and the ammonia escape breathing port 302 of the ammonia water storage tank 3 enters the gas distribution chamber 403 from an escape ammonia gas inlet 409 at the bottom end of the gas respirator 4 through a pipeline after being converged, enters the absorption chamber 404 through a continuous conveying mode of sieve holes of the sieve plate type gas distributor 402, and is vertically intersected with the desalted water sprayed from top to bottom by the vortex nozzle assembly 405, so that the mixed gas and the desalted water are uniformly mixed in a short time, the ammonia in the mixed gas is favorably and rapidly absorbed by the desalted water, and the purified mixed gas is discharged out of outdoor atmosphere after being detected by the ammonia concentration detector 410 to reach a discharge standard.

The control program of the gas respirator 4 is as follows: when the desalted water is filled into the ammonia water preparation device 2 through the desalted water outlet 408 of the gas respirator 4, the liquid level of the ammonia water preparation device 2 and the ammonia water storage tank 3 rises, the gas on the upper parts of the ammonia water preparation device 2 and the ammonia water storage tank 3 is compressed, the system pressure is increased, the ammonia-containing mixed gas enters the gas distribution chamber 403 of the gas respirator 4, bubbles are formed through the sieve plate type gas distributor 402 and enter the absorption chamber 404, the ammonia gas in the mixed gas is absorbed by the desalted water sprayed out of the vortex nozzle assembly 405, the detection probe of the ammonia gas concentration detector 410 communicates the detected signal to the programmable controller 101, when the measured ammonia gas content value reaches the set emission standard value, the programmable controller 101 gives an instruction signal for opening the emptying electric regulating valve, the gas after absorption and purification is discharged outdoors through the emptying pipeline, and when the liquid levels of the ammonia water preparation device 2 and the ammonia water storage tank 3 reach the set value, the water is stopped to enter, the system does not discharge air any more, at the moment, the programmable controller 101 sends out an instruction to empty the air electric regulating valve and close, and the ammonia water preparation device 2 and the ammonia water storage tank 3 are closed; when the boiler water supply system is filled with ammonia water, the liquid level of the system gradually drops, negative pressure is gradually formed in the upper spaces of the ammonia water preparation device 2 and the ammonia water storage tank 3, the pressure sensor detects signal communication and sends the signal to the programmable controller 101, when the negative pressure reaches a set value, the programmable controller 101 sends an instruction to vent the air electric control valve to be opened, air enters the ammonia water preparation device 2 and the ammonia water storage tank 3 from the vent port 406, the pressure of the ammonia water preparation device 2 and the ammonia water storage tank 3 is not further dropped, the pressure of the ammonia water preparation device 2 and the ammonia water storage tank 3 is kept at a standard air pressure, the extraction of the ammonia water in the ammonia water storage tank 3 is facilitated, the system safety of the ammonia water preparation device 2 and the ammonia water storage tank 3 is protected, the ammonia adding is stopped, and the vent pipeline electric valve is closed in a linkage manner.

The working principle of the ammonia adding system 5 is as follows: the programmable controller 101 uses the set feed water pH value of the boiler feed water system as a parameter to instruct the variable frequency controller 502 to input a signal on the regulator, so that the variable frequency controller 502 outputs a voltage and frequency to change the motor rotation speed of the ammonia metering pump 503, thereby realizing the corresponding relationship between the feed water pH value and the motor rotation speed.

The working process of the ammonia adding system 5 is as follows: the pH value detector 501 detects the pH value of the feed water after ammonia is added into the pipeline 6 of the boiler feed water system, the range of the pH value is 0-14 and corresponds to a 4-20mA current signal, the signal is communicated to the programmable controller 101, then the sampling signal is reacted, the comprehensive operation comparison is carried out through the programmable controller 101, a corresponding control rotating speed frequency signal is output to the variable frequency controller 502, the rotating speed of the ammonia adding metering pump 503 is controlled to change the ammonia adding amount, and the purpose of automatic ammonia adding is achieved.

When the pH value is higher than the set upper limit, the signal of the electrode probe of the pH value detector 501 is fed back to the variable frequency controller 502 to reduce the rotation speed of the motor of the ammonia adding metering pump 503, reduce the ammonia adding amount to gradually lower the pH value of the feed water to reach the qualified range, and when the pH value is lower than the lower limit, the variable frequency controller 502 increases the rotation speed of the motor of the ammonia adding metering pump 503 to achieve the purpose of automatically increasing the ammonia amount, so that the pH value of the feed water gradually rises to reach the qualified range; when the pH value is in a qualified range, the rotating speed of the motor of the ammonia dosing pump 503 is kept unchanged, in normal operation, the pH value of circulating water in an ammonia dosing system is measured through a pH electrode probe, a 4-20mA analog quantity signal is converted and output to the variable frequency controller 502 and displayed on an instrument, the signal is compared with a given value, after the difference value is calculated through a proportional, integral and differential operation circuit, an automatic adjusting signal is output to control the operating speed of the motor of the ammonia dosing pump 503 to the corresponding pH value, the automatic control of the ammonia dosing amount is realized, the ammonia content of a water circulating system in a boiler is ensured to change in a normal range, and a feedback signal of process control timely and quickly ensures that the variable frequency controller 502 timely and effectively adjusts the operating speed of the motor of the ammonia dosing pump 503, so that the phenomena of uneven ammonia dosing of feed water and high and low pH values are avoided.

The intelligent ammonia production and feeding system realizes the automatic control preparation of the ammonia water solution, the concentration of the prepared ammonia water is constant, the feeding is automatic and intelligent, the consumption, pollution, production risk and labor amount are reduced, the operation operability and production safety are improved, the service life of equipment is prolonged, the equipment damage caused by inaccurate manual feeding at present is thoroughly changed, the water feeding safety of a boiler is ensured, the stability of water quality is ensured, and good economic and social benefits are achieved.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.