阅读说明：本技术 一种工业甲醛溶液在线连续检测及自清洁装置 (Industrial formaldehyde solution on-line continuous detection and self-cleaning device ) 是由 秦波 程泓源 李惠炼 涂芳 黎学明 于 2019-11-05 设计创作，主要内容包括：本发明公开了一种工业甲醛溶液在线连续检测及自清洁装置,包括物料釜、物料管道、超声波液体浓度检测器、淋洗管、DCS浓度管理系统和显示器；所述物料釜内储存有甲醛溶液；所述物料管道上连接有进料阀和离心泵；所述超声波液体浓度检测器和淋洗管设置在物料管道内部；所述淋洗管上具有可清洗超声波液体浓度检测器的淋洗喷孔；所述超声波液体溶度检测器、淋洗管、显示器、进料阀和离心泵与DCS浓度管理系统连接。本发明通过一种工业甲醛溶液在线连续检测及自清洁装置,能够连续在线检测和实时显示物料釜内工业甲醛浓度,并通过淋洗管实现检测装置的自清洁,同时,DCS浓度管理系统上搭载的报警功能和错误信号功能有效地保证了工业甲醛生产的安全高效运行。(The invention discloses an on-line continuous detection and self-cleaning device for an industrial formaldehyde solution, which comprises a material kettle, a material pipeline, an ultrasonic liquid concentration detector, a spray washing pipe, a DCS concentration management system and a display, wherein the material kettle is connected with the material pipeline through a pipeline; a formaldehyde solution is stored in the material kettle; the material pipeline is connected with a feed valve and a centrifugal pump; the ultrasonic liquid concentration detector and the leaching pipe are arranged inside the material pipeline; the leaching pipe is provided with a leaching spray hole capable of cleaning the ultrasonic liquid concentration detector; the ultrasonic liquid solubility detector, the spray washing pipe, the display, the feed valve and the centrifugal pump are connected with the DCS concentration management system. According to the on-line continuous detection and self-cleaning device for the industrial formaldehyde solution, the concentration of the industrial formaldehyde in the material kettle can be continuously detected on line and displayed in real time, the self-cleaning of the detection device is realized through the leaching pipe, and meanwhile, the safe and efficient operation of the industrial formaldehyde production is effectively guaranteed through the alarm function and the error signal function carried on the DCS concentration management system.)

1. The utility model provides an online continuous detection of industry formaldehyde solution and automatically cleaning device, is including material cauldron (1) of storing industry formaldehyde solution, material pipeline (2) of carrying industry formaldehyde solution, ultrasonic wave liquid concentration detector (3) that are used for online real-time detection industry formaldehyde solution concentration, drench and wash pipe (4), DCS concentration management system (5) and display (6), its characterized in that: the material pipeline (2) is connected with a feed valve (7) and a centrifugal pump (8).

2. The on-line continuous detecting and self-cleaning device for industrial formaldehyde solution as claimed in claim 1, wherein: the ultrasonic liquid solubility detector (3), the shower pipe (4), the display (6), the feed valve (7) and the centrifugal pump (8) are connected with the DCS concentration management system (5).

3. The on-line continuous detecting and self-cleaning device for industrial formaldehyde solution as claimed in claim 1, wherein: and the DCS concentration management system (5) is also connected with a buzzer (9) for giving an alarm.

4. The on-line continuous detecting and self-cleaning device for industrial formaldehyde solution as claimed in claim 1, wherein: the display (6) adopts an LCD display screen.

5. The on-line continuous detecting and self-cleaning device for industrial formaldehyde solution as claimed in claim 1, wherein: the ultrasonic liquid concentration detector (3) is arranged inside the material pipeline (2); the ultrasonic liquid concentration detector (3) comprises a vibrator (10) and a thermistor (11); the vibrator (10) is used for transmitting and receiving ultrasonic signals and measuring the propagation velocity of ultrasonic waves in the liquid; the thermistor (11) is used for measuring the temperature in the liquid.

6. The on-line continuous detecting and self-cleaning device for industrial formaldehyde solution as claimed in claim 1, wherein: the ultrasonic liquid concentration detector (3) is made of a material with good corrosion resistance and durability, and can detect the concentration of a wide range of liquids such as acid, alkali, organic solvent and the like.

7. The on-line continuous detecting and self-cleaning device for industrial formaldehyde solution as claimed in claim 1, wherein: the spray washing pipe (4) is arranged inside the material pipeline (2), and spray washing spray holes (13) for spraying washing liquid to wash the ultrasonic liquid concentration detector are uniformly distributed in the spray washing pipe (4); the cleaning solution is 10 wt% of NaOH solution; the cleaning liquid is stored in a rinsing tank (12).

8. The on-line continuous detecting and self-cleaning device for industrial formaldehyde solution as claimed in claim 1, wherein: ultrasonic wave liquid concentration detector (3) and drench and wash pipe (4) and all connect on material pipeline (2) through the ring flange, and here material pipeline also passes through the ring flange and is connected with other part material pipeline, makes things convenient for concentration detection and self-cleaning device's dismantlement to wash and regularly change.

Technical Field

The invention relates to the field of formaldehyde concentration detection, in particular to an on-line continuous detection and self-cleaning device for an industrial formaldehyde solution.

Background

The industrial formaldehyde solution is colorless transparent liquid with pungent smell, is an important organic chemical raw material besides being directly used as a medical preservative, and can be used for producing phenolic resin, polyformaldehyde plastics, urotropine, pesticides, medicines, dyes, vinylon fibers and the like.

The formaldehyde content is an important quality index of industrial formaldehyde solutions. The method for measuring the formaldehyde content in the national standard (GB/T9009-1998) of the industrial formaldehyde solution is a chemical analysis method, namely an acid-base titration method. The determination principle is that formaldehyde reacts with excessive neutral sodium sulfite solution to generate sodium hydroxide, and the sodium hydroxide is titrated by using standard titration solution of sulfuric acid with thymolphthalein as an indicator (the end point is blue which just disappears). The method generally meets the requirements of high degree of certainty and wide measurement range, but belongs to off-line detection, namely, an industrial formaldehyde solution sample is collected back to a laboratory for analysis, so the detection period according to the method is long, the cost is high, the steps are complicated, the field to be detected can not be directly carried out, and the concentration of the industrial formaldehyde solution can not be reflected in real time. Due to the reasons, the results of central control analysis and product analysis are not consistent, so that a production workshop is not suitable; sometimes, the analysis results between the manufacturer and the user are not consistent, and some unnecessary quality objections are caused. Therefore, the on-line continuous detection device with low development cost, automation and high accuracy has important significance.

Disclosure of Invention

The invention aims to solve the technical problem of providing an on-line continuous detection and self-cleaning device for industrial formaldehyde solution aiming at the defects of the background technology, which can detect the concentration of the industrial formaldehyde solution in a material kettle in real time, clean a detector and reduce the reject ratio of products.

The invention adopts the following technical scheme for solving the technical problems:

an industrial formaldehyde solution on-line continuous detection and self-cleaning device comprises a material kettle for storing an industrial formaldehyde solution, a material pipeline for conveying the industrial formaldehyde solution, an ultrasonic liquid concentration detector for detecting the concentration of the industrial formaldehyde solution on line in real time, a shower pipe for cleaning the detector, a DCS concentration management system and a display; and the material pipeline is connected with a feed valve and a centrifugal pump.

As a further preferable scheme of the on-line continuous detection and self-cleaning device for the industrial formaldehyde solution, the ultrasonic liquid solubility detector, the shower pipe, the display, the feed valve and the centrifugal pump are connected with the DCS concentration management system.

As a further preferable scheme of the on-line continuous detection and self-cleaning device for the industrial formaldehyde solution, a buzzer for giving an alarm is also connected to the DCS concentration management system.

As a further preferable scheme of the on-line continuous detection and self-cleaning device for the industrial formaldehyde solution, an LCD screen is adopted by the display.

As a further preferable scheme of the on-line continuous detection and self-cleaning device for the industrial formaldehyde solution, the ultrasonic liquid concentration detector is arranged inside the material pipeline and comprises a vibrator and a thermistor, wherein the vibrator is used for transmitting and receiving ultrasonic signals and measuring the propagation speed of ultrasonic waves in the liquid, and the thermistor is used for measuring the temperature in the liquid.

As a further preferable scheme of the on-line continuous detection and self-cleaning device for the industrial formaldehyde solution, the ultrasonic liquid concentration detector is made of a material with good corrosion resistance and durability, and can be used for detecting the concentration of a wide range of liquids such as acid, alkali, organic solvent and the like.

As a further preferable scheme of the on-line continuous detection and self-cleaning device for the industrial formaldehyde solution, the leaching pipe is arranged inside the material pipeline, leaching spray holes are uniformly distributed in the leaching pipe and used for spraying a cleaning solution to clean the ultrasonic liquid concentration detector, the cleaning solution is a 10 wt% NaOH solution, and the NaOH solution is stored in the leaching tank.

As a further preferred scheme of the on-line continuous detection and self-cleaning device for the industrial formaldehyde solution, the ultrasonic liquid concentration detector and the spray-washing pipe are connected to the material pipeline through the flange plate, and the material pipeline is also connected with other parts of the material pipeline through the flange plate, so that the concentration detection and self-cleaning device is convenient to completely disassemble and clean and replace periodically.

Compared with the prior art, the invention adopting the technical scheme has the following technical effects:

1. the invention adopts the ultrasonic liquid detector, utilizes the characteristic that the propagation speed of ultrasonic waves changes along with the concentration and temperature change of liquid to measure the liquid solubility, has no influence of vibration, noise, flow velocity and color in detection, and is beneficial to measuring the concentration of the formaldehyde solution with high precision; meanwhile, the ultrasonic liquid concentration detector cannot pollute liquid, and the product is good in maintenance-free performance.

2. The invention integrates 5 steps of feeding, detecting, self-cleaning, displaying and early warning into a whole through the DCS concentration management system, and ensures that the detection result is more accurate and timely and the detection equipment is more convenient to clean by carrying out decentralized control, centralized monitoring and operation on each equipment. Meanwhile, the DCS concentration management system is provided with an alarm function and an error signal function, so that the working personnel can be prompted to take corresponding measures in time, and the safe and efficient operation of industrial formaldehyde detection is effectively guaranteed.

Drawings

FIG. 1 is a schematic diagram of the system of the present invention;

FIG. 2 is a schematic view of a partial pipe of the inspection and cleaning apparatus of the present invention;

FIG. 3 is a perspective view of a partial pipe of the inspection and cleaning apparatus of the present invention;

FIG. 4 is a top view of a partial pipe of the inspection and cleaning apparatus of the present invention;

FIG. 5 is a schematic view of an ultrasonic liquid concentration detector of the present invention;

in FIGS. 1 to 5, 1-material pot; 2-material pipeline; 3-ultrasonic liquid concentration detector; 4-a shower pipe; 5-DCS concentration management system; 6-a display; 7-a feed valve; 8-a centrifugal pump; 9-a buzzer; 10-a vibrator; 11-a thermistor; 12-leaching a jar; 13-rinsing the orifice.

Detailed Description

The technical solution of the present invention is further described in detail below with reference to the accompanying drawings.

The system structure schematic diagram shown in fig. 1 comprises a material kettle 1, a material pipeline 2, an ultrasonic liquid concentration detector 3, a leaching pipe 4, a DCS concentration management system 5 and a display 6. The material kettle 1 is used for storing the industrial formaldehyde solution, and the material pipeline 2 is used for conveying the industrial formaldehyde solution. The material pipeline 2 is connected with a feed valve 7 and a centrifugal pump 8.

As shown in the schematic system structure diagram of fig. 1, the ultrasonic liquid solubility detector 3, the leaching pipe 4, the display 6, the feed valve 7 and the centrifugal pump 8 are connected with the DCS concentration management system 5, which is beneficial to the automatic control of the detection device.

As shown in the schematic system configuration diagram of fig. 1, a buzzer 9 for giving an alarm is connected to the DCS concentration management system 4.

As shown in the schematic system structure of fig. 1, the display 6 is an LCD display screen.

As shown in the schematic system configuration of fig. 1, the washing pipe 4 is connected to a washing tank 12 for storing washing liquid.

As shown in fig. 2-4, the schematic diagram, the perspective diagram and the top view of the local pipeline of the detection and cleaning device are shown, two ends of the local pipeline are connected with other material pipelines through flanges, the pipeline is a cylindrical device with an enlarged volume and can accommodate the ultrasonic liquid concentration detector 3 and the four shower pipes 4, and meanwhile, the liquid flow difference caused by pipeline change can be relieved.

As shown in fig. 2, the schematic view of the local pipeline of the detecting and cleaning device is that the rinsing pipes 4 are uniformly distributed with rinsing spray holes 13, and the rinsing spray holes 13 are used for spraying the cleaning liquid to clean the ultrasonic liquid concentration detector 3 in the spraying direction. The cleaning solution is a 10 wt% NaOH solution.

As shown in fig. 5, the ultrasonic liquid concentration detector 3 includes an oscillator 10 and a thermistor 11. The vibrator 10 is used to transmit and receive ultrasonic signals and measure the propagation velocity of ultrasonic waves in the liquid, and the thermistor 11 is used to measure the temperature in the liquid. The ultrasonic liquid concentration detector 3 is made of a material having excellent corrosion resistance and durability, and can detect the concentration of a wide range of liquids such as acids, alkalis, and organic solvents.

As shown in fig. 5, the schematic diagram of the ultrasonic liquid concentration detector measures the liquid solubility by using the characteristic that the propagation velocity of the ultrasonic wave changes with the concentration and temperature of the liquid. The ultrasonic liquid concentration detector is not influenced by vibration, noise, flow velocity and color, is favorable for measuring the concentration of the formaldehyde solution with high precision, cannot pollute the liquid, and has good maintenance-free performance.

The invention uses the DCS concentration management system, integrates five steps of feeding, detecting, self-cleaning, displaying and early warning, and has the following advantages: 1. the automatic control system automatically controls the material valve and the centrifugal pump to carry out material conveying, when liquid materials flow through the ultrasonic liquid detector, a DCS concentration management system processes detection signals and displays various parameters such as liquid concentration, temperature and sound velocity in real time, so that the detection precision is more accurate, and workers can conveniently and visually observe detection results; 2. The automatic control showering pipe regularly cleans the ultrasonic liquid concentration detector, and the accuracy of a measuring result is ensured while the detector is maintained; 3. when the detected materials exceed the set parameter range, the alarm function and the error signal function carried on the DCS concentration management system transmit output signals to the buzzer to give an alarm, and the working personnel are prompted to take corresponding measures. The on-line continuous detection device for the industrial formaldehyde solution greatly reduces the labor intensity, realizes the automatic control and on-line detection of detection equipment, and effectively ensures the safe and efficient operation of the industrial formaldehyde production.