阅读说明：本技术 一种循环能高效闪蒸系统及闪蒸方法 (Efficient flash evaporation system and flash evaporation method for circulating energy ) 是由 杨积栋 李媛 于 2021-06-22 设计创作，主要内容包括：本发明公开了一种循环能高效闪蒸系统,包括闪蒸罐、真空蒸汽负压压缩机、回热板换热器和冷凝储水器,闪蒸罐通过蒸汽出口与真空蒸汽负压压缩机连通连接,闪蒸罐通过目标液体进口和第一目标液体出口分别与回热板换热器两端连通连接,闪蒸罐的第二目标液体出口连通连接有第一负压水泵,回热板换热器另两端分别与真空蒸汽负压压缩机和冷凝水储水器连通连接,本发明利用耐高温的真空蒸汽负压压缩机,将低温无法使用的闪蒸蒸汽调节成高温可回收使用的闪蒸蒸汽,通过板换,全部实现闪蒸蒸汽的能量回收,循环输送至闪蒸罐内部目标液体中,使得本发明能耗需求大幅降低。(The invention discloses a high-efficiency flash evaporation system of circulating energy, which comprises a flash evaporation tank, a vacuum steam negative pressure compressor, a heat-regenerative plate heat exchanger and a condensation water storage device, wherein the flash evaporation tank is communicated and connected with the vacuum steam negative pressure compressor through a steam outlet, the flash evaporation tank is respectively communicated and connected with two ends of the heat-regenerative plate heat exchanger through a target liquid inlet and a first target liquid outlet, a second target liquid outlet of the flash evaporation tank is communicated and connected with a first negative pressure water pump, and the other two ends of the heat-regenerative plate heat exchanger are respectively communicated and connected with the vacuum steam negative pressure compressor and the condensation water storage device. And through plate exchange, the energy recovery of the flash steam is completely realized, and the flash steam is circularly conveyed into the target liquid in the flash tank, so that the energy consumption requirement of the flash tank is greatly reduced.)

1. A cycle energy efficient flash system, comprising the following components: the flash tank is provided with a steam outlet, a target liquid inlet, a first target liquid outlet and a second target liquid outlet, the flash tank is communicated and connected with the vacuum steam negative pressure compressor through the steam outlet, the flash tank is respectively communicated and connected with the two ends of the heat recovery plate heat exchanger through the target liquid inlet and the first target liquid outlet, the second target liquid outlet of the flash tank is communicated and connected with a first negative pressure water pump, and the other two ends of the heat recovery plate heat exchanger are respectively communicated and connected with the vacuum steam negative pressure compressor and the condensate water storage device.

2. The cyclic energy efficient flash system of claim 1, wherein: the vacuum negative pressure compressor is connected with the flash tank through the air inlet, the cross supports are fixedly mounted at two ends of the air inlet, the bearings are fixedly mounted in the middle of the two cross supports, the shaft rods are movably mounted between the two cross supports, two ends of each shaft rod are inserted into the bearings, the surface of each shaft rod is provided with a rotor, the multistage impellers are integrated in the rotor, the permanent magnets are arranged outside the rotor, and the motor coils are arranged outside the permanent magnets.

3. The system of claim 1, wherein the flash evaporator further comprises: and a second negative pressure water pump and an electric heater are arranged on a pipeline for connecting the heat recovery plate with the flash tank through the first target liquid outlet.

4. The cyclic energy efficient flash system of claim 1, wherein: and two water outlets are arranged on the condensed water storage device and are respectively communicated and connected with a vacuum pump and a third negative pressure water pump.

5. The cyclic energy efficient flash system of claim 2, wherein: the bearing has a high-temperature resistant effect, is realized by ceramic coating, is added with a nanoscale metal additive, runs for 72 hours at a high temperature of 300 ℃, and has a thickness of 0.3-1 um.

6. The cyclic energy efficient flash system of claim 1, wherein: the working conditions of the dynamic balance and disturbance airflow of the rotor are adjusted and corrected through 10-hour experimental simulation, the rotating speed is 3000-15000 rpm, and the nickel plating is 5 um.

7. A method of flashing according to any one of claims 1 to 6, comprising the steps of:

a. the low-temperature gas at 40-60 ℃ enters a vacuum steam negative pressure compressor through a flash tank;

b. the rotating speed of the rotor is controlled to be 3000-24000 r/min, and the isentropic compression energy efficiency reaches 55-85%;

c. the vacuum compressor raises the pressure to 2-5 times of the absolute pressure of the flash tank, and the air flow is controlled to be 3000-30000 cubic/h, so that the low-temperature flash steam is changed into high-temperature flash steam;

d. the outlet of the vacuum steam negative pressure compressor sends high-temperature flash steam into the heat-returning plate heat exchanger, low-temperature target liquid in the flash tank exchanges heat with the high-temperature flash steam to become condensed water, the condensed water enters a condensation water storage device, and then the condensed water is intermittently discharged through a third negative pressure water pump and a vacuum pump;

e. and (3) exchanging heat between the low-temperature target liquid and high-temperature flash steam, increasing the temperature, entering a flash tank for flash evaporation, and pumping the target liquid into the next procedure through a first negative pressure pump when the target liquid in the flash tank meets the requirement.

8. A flash process according to claim 7, wherein: and (d) when the low-temperature target liquid in the step d enters the heat-regenerative plate heat exchanger for the first time, heating the low-temperature target liquid by using the electric heater.

Technical Field

The invention relates to the technical field of drying equipment, in particular to a circulating energy efficient flash evaporation system and a flash evaporation method.

Background

The flash evaporation equipment on the market at present basically realizes the following methods:

1. maintaining the internal vacuum degree of the flash tank by using a vacuum pump;

2. heating the target liquid by using steam or hot water, and flashing the target liquid under the negative pressure condition after the target liquid enters a flash tank.

3. The flash steam is discharged through a pipeline at the top of the flash tank, enters a circulating water plate for heat exchange, and is changed into condensed water after heat exchange with circulating water to be discharged.

The existing flash evaporation implementation method is very energy-consuming, a large amount of hot water or steam is needed to heat target liquid in the target liquid circulation flash evaporation process, flash evaporation steam after flash evaporation needs a large amount of circulating water to be cooled, the flash evaporation steam becomes condensed water, the energy consumption is high in the cooling process, the pressure and the temperature of the flash evaporation steam at the outlet of the compressor are adjusted by the vacuum steam negative pressure compressor through adjusting the rotating speed of the rotor, and how to change the pressure and the temperature of the flash evaporation steam by using the vacuum compressor is the problem which needs to be solved at present.

Disclosure of Invention

The invention aims to provide a circulating energy efficient flash evaporation system and a flash evaporation method.

In order to achieve the purpose, the technical scheme adopted by the invention is as follows: a cycle energy efficient flash system comprising the following components: the flash tank is provided with a steam outlet, a target liquid inlet, a first target liquid outlet and a second target liquid outlet, the flash tank is communicated and connected with the vacuum steam negative pressure compressor through the steam outlet, the flash tank is respectively communicated and connected with the two ends of the heat recovery plate heat exchanger through the target liquid inlet and the first target liquid outlet, the second target liquid outlet of the flash tank is communicated and connected with a first negative pressure water pump, and the other two ends of the heat recovery plate heat exchanger are respectively communicated and connected with the vacuum steam negative pressure compressor and the condensate water storage device.

Preferably, the vacuum negative pressure compressor is connected with the flash tank through an air inlet, cross supports are fixedly mounted at two ends of the air inlet, bearings are fixedly mounted in the middle of the two cross supports, shaft rods are movably mounted between the two cross supports, two ends of each shaft rod are inserted into the bearings, a rotor is mounted on the surface of each shaft rod, multistage impellers are integrated in the rotor, permanent magnets are arranged outside the rotor, and motor coils are arranged outside the permanent magnets.

Preferably, a second negative pressure water pump and an electric heater are installed on a pipeline connecting the heat recovery plate with the flash tank through the first target liquid outlet.

Preferably, two water outlets are arranged on the condensed water storage device, and a vacuum pump and a third negative pressure water pump are respectively connected with the two water outlets in a communication mode.

Preferably, the vacuum steam negative pressure compressor bearing has a high temperature resistant effect, is realized by ceramic coating, is added with a nanoscale metal additive, runs for 72 hours at a high temperature of 300 ℃, and has a thickness of 0.3-1 um.

Preferably, the dynamic balance of the vacuum steam negative pressure compressor rotor and the working condition of disturbed airflow are adjusted and corrected through 10-hour experimental simulation, the rotating speed is 3000-15000 r/min, and the nickel plating is 5 um.

A method of flashing a component according to any one of the preceding claims, comprising the steps of:

a. the low-temperature gas at 40-60 ℃ enters a vacuum steam negative pressure compressor through a flash tank;

b. the rotating speed of the rotor is controlled to be 3000-24000 r/min, and the isentropic adjustment energy efficiency reaches 55-85%;

c. the vacuum regulating box raises the pressure to 2-5 times of the absolute pressure of the flash tank, and the gas amount is controlled to be 3000-30000 cubic/h, so that the low-temperature gas is changed into high-temperature flash steam;

d. the vacuum steam negative pressure compressor sends the high-temperature flash steam into the heat-returning plate heat exchanger, the low-temperature target liquid in the flash tank exchanges heat with the high-temperature flash steam to become condensed water which enters a condensation water storage device, and then the condensed water is intermittently discharged through a third negative pressure water pump and a vacuum pump;

e. and (3) exchanging heat between the low-temperature target liquid and high-temperature flash steam, increasing the temperature, entering a flash tank for flash evaporation, and pumping the target liquid into the next procedure through a first negative pressure pump when the target liquid in the flash tank meets the requirement.

Preferably, when the low-temperature target liquid in the step d enters the regenerative plate heat exchanger for the first time, the low-temperature target liquid can be heated by the electric heater.

Compared with the prior art, the invention has the advantages that:

according to the invention, the high-temperature-resistant vacuum steam negative pressure compressor is utilized to adjust the flash steam which cannot be used at low temperature into the flash steam which can be recycled at high temperature, and the energy recovery of the flash steam is completely realized through plate exchange and is circularly conveyed into the target liquid in the flash tank, so that the energy consumption requirement is greatly reduced, the target liquid is not required to be heated by hot water or steam, and the temperature of circulating water is not required to be reduced;

through improving bearing and rotor among the vacuum steam negative pressure compressor, improved work efficiency, can reduce the heat energy resource consumption.

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, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a block diagram of a cycle energy efficient flash system of the present invention;

fig. 2 is a structural view of an air inlet of the vacuum vapor negative pressure compressor of the present invention.

In the figure: the system comprises a flash tank 1, a vacuum steam negative pressure compressor 2, a heat recovery plate heat exchanger 3, a condensation water storage device 4, a vacuum pump 5, a first negative pressure water pump 6, a second negative pressure water pump 7, a third negative pressure water pump 8, an electric heater 9, a permanent magnet 10, a rotor 11 (an internal integrated multistage impeller), a cross support 12 and a shaft rod 13.

Detailed Description

The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings so that the advantages and features of the present invention can be more easily understood by those skilled in the art, and the scope of the present invention will be more clearly and clearly defined.

Referring to fig. 1, the present invention provides a cycle energy efficient flash system comprising the following components: flash tank 1, vacuum steam negative pressure compressor 2, backheat board heat exchanger 3 and condensate water receiver 4, be equipped with the steam outlet on the flash tank 1, the target liquid import, first target liquid export and second target liquid export, flash tank 1 is connected with vacuum steam negative pressure compressor 2 intercommunication through the steam outlet, flash tank 1 is connected with 3 both ends intercommunications of backheating board heat exchanger respectively through target liquid import and first target liquid export, the second target liquid export intercommunication of flash tank 1 is connected with first negative pressure water pump 6, backheat board heat exchanger 3 other both ends respectively with vacuum steam negative pressure compressor 2 and condensate water receiver 4 intercommunications are connected.

As shown in fig. 2, in this embodiment, the vacuum negative pressure compressor 2 is connected with the flash tank 1 through an air inlet, cross supports 12 are fixedly mounted at both ends of the air inlet, bearings are fixedly mounted in the middle of the two cross supports 12, a shaft rod 13 is movably mounted between the two cross supports 12, both ends of the shaft rod 13 are inserted into the bearings, a rotor 11 is mounted on the surface of the shaft rod 13, a multistage impeller is integrated inside the rotor 11, a permanent magnet 10 is arranged outside the rotor 11, a motor coil is arranged outside the permanent magnet 10, a high-performance temperature-resistant insulating material is adopted in the manufacturing process of the motor coil, and after tuning ultrasonic waves under 90% vacuum conditions, broadband vibration is performed.

In this embodiment, the second negative pressure water pump 7 and the electric heater 9 are installed on the pipeline connecting the heat recovery plate 3 with the flash tank 1 through the first target liquid outlet.

In this embodiment, the condensed water storage tank 4 is provided with two water outlets, and the two water outlets are respectively connected with a vacuum pump 5 and a third negative pressure water pump 8.

In the embodiment, the bearing has a high-temperature resistant effect, the bearing is realized by ceramic coating, the nanoscale metal additive is added, the bearing runs for 72 hours at the high temperature of 300 ℃, the thickness of the bearing is 0.3-1 um, the bearing 5 realizes the temperature resistance of more than 150 ℃ by a ceramic coating process, the running temperature of the normal control shaft 5 is within 110 ℃, and the bearing has extremely high wear resistance and extremely low resistance.

In the embodiment, the dynamic balance and disturbed airflow working condition of the rotor 11 (the internal integrated multistage impeller) is adjusted and corrected through 10-hour experimental simulation, the rotating speed is 3000-15000 r/min, and the nickel plating is 5 um.

A method of flashing the above components comprising the steps of:

a. the low-temperature gas at 40-60 ℃ enters a vacuum steam negative pressure compressor 2 through a flash tank 1;

b. the rotating speed of a rotor 11 (internally integrated with a multi-stage impeller) is controlled to be 3000-24000 r/min, and the isentropic regulation energy efficiency reaches 55-85%;

c. the vacuum regulating box raises the pressure to 2-5 times of the absolute pressure of the flash tank, and the gas amount is controlled to be 3000-30000 cubic/h, so that the low-temperature gas is changed into high-temperature flash steam;

d. the vacuum steam negative pressure compressor 2 sends the high-temperature flash steam into the heat-returning plate heat exchanger 3, the low-temperature target liquid in the flash tank 1 exchanges heat with the high-temperature flash steam to become condensed water, the condensed water enters the condensation water storage device 4, and then the condensed water is intermittently discharged through the third negative pressure water pump 8 and the vacuum pump 5;

e. and the low-temperature target liquid exchanges heat with high-temperature flash steam, enters the flash tank 1 for flash after the temperature is increased, and is pumped into the next procedure through the first negative pressure pump 6 when the target liquid in the flash tank 1 meets the requirement.

In this embodiment, when the low-temperature target liquid in step d enters the regenerative plate heat exchanger 3 for the first time, the low-temperature target liquid can be heated by the electric heater 9 for heating when the system is just started, and the heat exchanger 3 is turned off when the system is normally running.

Although the embodiments of the present invention have been described with reference to the accompanying drawings, various changes or modifications may be made by the patentees within the scope of the appended claims, and within the scope of the invention, as long as they do not exceed the scope of the invention described in the claims.