Automatic gas wet-type washing and purifying device and method

Abstract

The invention discloses an automatic gas wet-type washing and purifying device and method. The device comprises a gas purifier, a supercharger, an aeration module, a trap, a liquid level online monitoring module, a washing liquid online monitoring module, a controller, a liquid discharging module and a liquid supplementing module. The pressurizer pressurizes the pollutant-containing gas and then transmits the pollutant-containing gas to the aeration module at the bottom in the gas purifier for aeration; the trap captures washing liquid steam in the pure gas, and the washing liquid steam is further purified and then discharged; the liquid level on-line monitoring module monitors the liquid level of the washing liquid in the gas purifier in real time; the washing liquid on-line monitoring module monitors the physicochemical property of the washing liquid in the gas purifier in real time; the controller collects signals of the liquid level on-line monitoring module and the washing liquid on-line monitoring module, judges and outputs control signals to control the liquid supplementing module and the liquid discharging module to act, the liquid discharging module conducts or stops discharging liquid, and the liquid supplementing module conducts or stops supplementing liquid. The device is high in purification efficiency, simple in structure and high in automation degree.

Description

Technical Field

[0001] The present invention relates to the technical field of industrial gas purification, and in particular to an automated gas wet scrubbing purification device and method. Background Art

[0002] Gas wet scrubbing purification technology is a method for removing pollutants from gas to improve gas purity. This technology achieves the purpose of gas purification by contacting gas containing pollutants with liquid and using physical or chemical effects to capture or transform these pollutants. This method is widely used in the fields of acid gas treatment in the chemical industry and smoke removal in the steel and metallurgical industry. The existing technologies, such as spray towers, venturi scrubbers, and packed towers, have problems of complex structures and large operating errors. Therefore, there is a need for an automated gas wet scrubbing purification method with high purification efficiency, simple structure, and high degree of automation. Summary of the invention

[0003] In view of this, the present invention provides an automated gas wet scrubbing purification device and method, which has high purification efficiency, simple structure and high degree of automation.

[0004] The technical solution adopted by the present invention is as follows:

[0005] An automated gas wet scrubbing purification device, comprising a gas purifier, a supercharger, an aeration module, a collector, a liquid level online monitoring module, a scrubbing liquid online monitoring module, a controller, a liquid discharge module and a liquid replenishment module;

[0006] The supercharger is used for pressurizing the gas containing pollutants and is connected to the bottom of the gas purifier through a pipeline; the aeration module is arranged at the bottom of the gas purifier and is used for aerating the gas containing pollutants; the collector is arranged at the top of the gas purifier and is used for capturing the washing liquid vapor in the pure gas and discharging it after further purification; the liquid level online monitoring module is used for real-time monitoring of the liquid level of the washing liquid in the gas purifier; the washing liquid online monitoring module is used for real-time monitoring of the physical and chemical properties of the washing liquid in the gas purifier; the controller is used to collect signals from the liquid level online monitoring module and the washing liquid online monitoring module, perform logical judgment on the collected signals and output control signals to control the actions of the liquid replenishment module and the liquid discharge module; the liquid discharge module is used to receive the control signal of the controller and perform or stop the liquid discharge action; the liquid replenishment module is used to receive the control signal of the controller and perform or stop the liquid replenishment action.

[0007] Furthermore, the controller also has an over-limit alarm function, which is used to issue an alarm when the liquid level or physical and chemical properties of the washing liquid exceed a set range.

[0008] Furthermore, a sewage outlet is provided on the bottom surface of the gas purifier, which is connected to the drainage module through a pipeline.

[0009] Furthermore, the refill module includes a power unit and a washing liquid storage tank, the liquid outlet of the washing liquid storage tank is connected to the liquid inlet of the power unit, and the liquid outlet of the power unit is connected to the refill port arranged on the upper part of the gas purifier through a pipeline.

[0010] Furthermore, the liquid level online monitoring module adopts an ultrasonic liquid level sensor or a differential pressure liquid level transmitter.

[0011] The present invention also provides an automated gas wet scrubbing purification method, using the automated gas wet scrubbing purification device as described above, the method is as follows:

[0012] In the initial state, the liquid level and physical and chemical properties of the washing liquid in the gas purifier are within the set range, the drainage module is not in operation, the liquid replenishment module is not in operation, and the washing liquid in it is sufficient;

[0013] The pollutant-containing gas enters the aeration module in the gas purifier from the supercharger. The pollutant-containing gas is fully contacted with the scrubbing liquid through aeration. The scrubbing liquid captures or transforms the pollutants in the pollutant-containing gas by physical or chemical methods, turning the pollutant-containing gas into pure gas. The pure gas is further purified by the collector located at the top of the gas purifier and then discharged;

[0014] When the pollutants captured or converted by the washing liquid in the gas purifier reach a certain amount, its physical and chemical properties change. When the controller collects the physical and chemical properties of the washing liquid measured by the washing liquid online monitoring module and reaches the set value, it outputs a control signal to the drainage module; the drainage module automatically discharges the washing liquid in the gas purifier after responding; when the controller collects the washing liquid level measured by the liquid level online monitoring module and the liquid level is discharged to the lower limit setting value, the control signal is output to the drainage module to stop the drainage action. After the controller collects the state of the drainage module stopping drainage, the control signal is output to the replenishment module to start the replenishment module for automatic replenishment; when the controller collects the washing liquid level measured by the liquid level online monitoring module and reaches the replenishment upper limit setting value, the control signal is output to the replenishment module to stop the replenishment action.

[0015] Furthermore, when the automated gas wet scrubbing purification device operates abnormally, the controller generates an alarm when the liquid level of the scrubbing liquid measured by the online liquid level monitoring module or the physical and chemical properties of the scrubbing liquid measured by the online scrubbing liquid monitoring module exceed the set range.

[0016] Furthermore, the physical and chemical properties of the washing liquid measured by the liquid level online monitoring module are conductivity or pH or pH value.

[0017] Beneficial effects:

[0018] 1. The present invention utilizes an online monitoring module for washing liquid to monitor the physical and chemical properties of the washing liquid in real time, and combines a drainage module, a liquid replenishment module and an online liquid level monitoring module to realize automatic drainage and automatic liquid addition functions, thereby ensuring that the liquid level and physical and chemical properties of the washing liquid are within a set range, thereby improving the stability and reliability of the system; secondly, the present invention simplifies the system structure while ensuring the gas wet scrubbing purification capacity, greatly improves the utilization rate of the washing liquid, reduces the system operating cost, and overcomes the shortcomings of traditional gas purification methods such as complex structure and large operating errors.

[0019] 2. The aeration module provided in the present invention utilizes microporous aeration technology to increase the gas-liquid contact interface, improve the medium capture and conversion efficiency, greatly increase the gas wet scrubbing purification efficiency, and achieve the purpose of high-efficiency gas wet scrubbing purification.

[0020] 3. The controller of the present invention also has an over-limit alarm function, which issues an alarm when the liquid level or physical and chemical properties of the washing liquid exceed a preset range, further improving the reliability of the device operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is the principle diagram of the device of the present invention.

[0022] Among them, 1-supercharger, 2-gas purifier, 3-liquid level online monitoring module, 4-washing liquid online monitoring module, 5-controller, 6-drainage module, 7-sewage outlet, 8-liquid replenishment module power unit, 9-liquid replenishment module washing liquid storage tank, 1-1-supercharger air inlet, 1-2-supercharger exhaust port, 2-1-air inlet, 2-2-air outlet, 2-3-drainage outlet, 2-4-liquid replenishment port, 2-5-aeration module, 2-6-washing liquid, 2-7-collector, 8-1-liquid inlet, 8-2-liquid outlet I, 9-1-liquid outlet II. DETAILED DESCRIPTION

[0023] The present invention is described in detail below with reference to the accompanying drawings and embodiments.

[0024] The present invention provides an automated gas wet scrubbing purification device, such as Figure 1 As shown, it includes a gas purifier 2, a booster 1, an aeration module 2-5, a collector 2-7, a liquid level online monitoring module 3, a washing liquid online monitoring module 4, a controller 5, a drainage module 6 and a liquid replenishment module.

[0025] The gas purifier 2 is a main part used for wet scrubbing and purification of pollutant-containing gases, and is filled with scrubbing liquid 2-6. It also has an air inlet 2-1, an air outlet 2-2, a sewage outlet 2-3, and a liquid replenishment port 2-4. The air inlet 2-1 is located at the bottom of the gas purifier 2, the air outlet 2-2 is located at the top of the gas purifier 2, the sewage outlet 2-3 is located on the bottom surface of the gas purifier 2, and the liquid replenishment port 2-4 is located at the upper part of the gas purifier 2.

[0026] The supercharger 1 is used for pressurizing the pollutant-containing gas, and has a supercharger air inlet 1-1 and a supercharger exhaust port 1-2, and the supercharger exhaust port 1-2 is connected to the air inlet 2-1 set at the bottom of the gas purifier 2 through a pipeline. The supercharger 1 can select compressors and other devices of different structures according to the properties of the pollutant-containing gas.

[0027] The aeration module 2-5 is used to disperse the pressurized pollutant-containing gas into tiny bubbles, expand the contact area between the gas and the washing liquid 2-6, and increase the material transfer or conversion efficiency; the aeration module 2-5 is arranged at the bottom of the gas purifier 2, and is connected to the air inlet 2-1 of the gas purifier 2 through a pipeline; the washing liquid 2-6 completely immerses the aeration module 2-5. The aeration module 2-5 can select different structural forms of perforated plates, meshes, etc. according to the properties of the pollutant-containing gas.

[0028] The collector 2-7 is arranged at the top of the gas purifier 2, and is used to capture substances such as washing liquid vapor that may be contained in the clean gas after washing, and discharge the gas from the gas outlet 2-2 after further improving the purity of the gas.

[0029] The liquid level online monitoring module 3 is used for real-time monitoring of the liquid level of the washing liquid 2-6 in the gas purifier 2; liquid level measuring devices including but not limited to ultrasonic liquid level sensors and differential pressure liquid level transmitters can be used according to the properties of the washing liquid 2-6.

[0030] The washing liquid online monitoring module 4 is used to monitor the physical and chemical properties of the washing liquid 2-6 in the gas purifier 2 in real time; specifically, the physical and chemical property can be one of conductivity, pH, pH value and the like.

[0031] The installation method of the liquid level online monitoring module 3 and the washing liquid online monitoring module 4 is determined according to the measurement principle and the filling amount of the washing liquid 2-6 in the gas purifier 2. That is, the liquid level online monitoring module 3 determines its installation position according to the filling degree of the washing liquid 2-6 to ensure that the filling amount of the washing liquid 2-6 can be fully measured, and the probe of the washing liquid online monitoring module 4 should be inserted into the washing liquid 2-6 to a certain depth according to its measurement requirements to ensure the accuracy of its measurement data.

[0032] The controller 5 is used to collect signals from the liquid level online monitoring module 3 and the washing liquid online monitoring module 4, perform logical judgment on the collected signals and output control signals to control the actions of the liquid replenishment module and the liquid discharge module 6. It also has an over-limit alarm function, which is used to issue an alarm when the liquid level or physical and chemical properties of the washing liquid 2-6 exceed the set range.

[0033] The liquid discharge module 6 is used to receive the control signal of the controller 5, start or stop the liquid discharge action, and is connected to the sewage outlet 2-3 on the bottom surface of the gas purifier 2 through a pipeline; a power valve and other devices with different power sources and structural forms can be used according to the properties of the washing liquid 2-6 and the use conditions. The liquid discharge module 6 is connected to the sewage outlet 7 through a pipeline for discharging the washing liquid 2-6 after use.

[0034] The liquid replenishment module is used to receive the control signal of the controller 5 and start or stop the liquid replenishment action. The liquid replenishment module includes a liquid replenishment module power device 8 and a liquid replenishment module washing liquid storage tank 9. The liquid outlet II 9-1 of the liquid replenishment module washing liquid storage tank 9 is connected to the liquid inlet 8-1 of the liquid replenishment module power device 8, and the liquid outlet I 8-2 of the liquid replenishment module power device 8 is connected to the liquid replenishment port 2-4 set on the upper part of the gas purifier 2 through a pipeline. Among them, the liquid replenishment module power device 8 can use different power sources and pumps of different structural forms according to the properties of the washing liquid 2-6 and the use conditions.

[0035] In addition to the above components, process valves can be added according to different working conditions.

[0036] The present invention also provides an automated gas wet scrubbing purification method, using the automated gas wet scrubbing purification device as described above, the method is as follows:

[0037] In the initial state, the liquid level and physical and chemical properties of the washing liquid 2-6 in the gas purifier 2 are within the set range, the drainage module 6 is not in operation, the liquid replenishment module power device 8 is not in operation, and the washing liquid in the liquid replenishment module washing liquid storage tank 9 is sufficient.

[0038] The pollutant-containing gas enters the supercharger 1 from the supercharger air inlet 1-1, is pressurized by the supercharger 1, and is discharged from the supercharger exhaust port 1-2, and enters the aeration module 2-5 at the bottom of the gas purifier 2 through the air inlet 2-1. The pressurized pollutant-containing gas is aerated by the aeration module 2-5 and disperses into tiny bubbles, which are fully contacted with the washing liquid 2-6. The washing liquid 2-6 captures or converts the pollutants in the pollutant-containing gas by physical or chemical methods, so that the pollutant-containing gas becomes pure gas. The pure gas passes through the collector 2-7 located at the top of the gas purifier 2 to further remove the washing liquid vapor that may be contained in the gas, and is discharged from the gas purifier 2 through the air outlet 2-2.

[0039] When the pollutants captured or converted by the washing liquid 2-6 reach a certain amount, its physical and chemical properties change. When the controller 5 collects the physical and chemical properties of the washing liquid 2-6 measured by the washing liquid online monitoring module 4 and reaches the set value, it outputs a control signal to the drainage module 6; the drainage module 6 responds and starts to automatically discharge the washing liquid 2-6 in the gas purifier 2 to the sewage outlet 7 through the sewage outlet 2-3; when the controller 5 collects the liquid level of the washing liquid 2-6 measured by the liquid level online monitoring module 3 and discharges to the lower limit set value, it outputs a control signal to the drainage module 6 to stop the drainage action. The controller 5 collects the liquid level of the drainage module 6 and stops the drainage action. After the liquid discharge stops, a control signal is output to the liquid replenishment module power device 8 to start the liquid replenishment module power device 8. The washing liquid in the liquid replenishment module washing liquid storage tank 9 passes through the liquid outlet II 9-1, the liquid inlet 8-1, the liquid replenishment module power device 8, the liquid outlet I 8-2, and the liquid replenishment port 2-4 to enter the gas purifier 2. With the automatic liquid replenishment action, the liquid level of the washing liquid 2-6 in the gas purifier 2 continues to rise; when the controller 5 collects the liquid level replenishment of the washing liquid 2-6 measured by the liquid level online monitoring module 3 and reaches the upper limit set value, a control signal is output to the liquid replenishment module power device 8 to stop the liquid replenishment action.

[0040] When an abnormal situation such as leakage occurs during the operation of the automated gas wet scrubbing purification device, the liquid level or physical and chemical properties of the scrubbing liquid 2-6 in the gas scrubber 2 become abnormal, and the controller 5 collects the liquid level of the scrubbing liquid 2-6 measured by the liquid level online monitoring module 3 or a physical and chemical property of the scrubbing liquid 2-6 measured by the scrubbing liquid online monitoring module 4 and exceeds the set range, an alarm is triggered.

[0041] In summary, the above are only preferred embodiments of the present invention and are not intended to limit the protection scope of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An automated gas wet scrubbing purification device, characterized in that: It includes a gas purifier, a booster, an aeration module, a collector, a liquid level online monitoring module, a washing liquid online monitoring module, a controller, a liquid discharge module and a liquid replenishment module; The supercharger is used for pressurizing the gas containing pollutants and is connected to the bottom of the gas purifier through a pipeline; the aeration module is arranged at the bottom of the gas purifier and is used for aerating the gas containing pollutants; the collector is arranged at the top of the gas purifier and is used for capturing the washing liquid vapor in the pure gas and discharging it after further purification; the liquid level online monitoring module is used for real-time monitoring of the liquid level of the washing liquid in the gas purifier; the washing liquid online monitoring module is used for real-time monitoring of the physical and chemical properties of the washing liquid in the gas purifier; the controller is used to collect signals from the liquid level online monitoring module and the washing liquid online monitoring module, perform logical judgment on the collected signals and output control signals to control the actions of the liquid replenishment module and the liquid discharge module; the liquid discharge module is used to receive the control signal of the controller and perform or stop the liquid discharge action; the liquid replenishment module is used to receive the control signal of the controller and perform or stop the liquid replenishment action.

2. The automatic gas wet scrubbing purification device according to claim 1, characterized in that: The controller also has an over-limit alarm function, which is used to issue an alarm when the liquid level or physical and chemical properties of the washing liquid exceed the set range.

3. The automatic gas wet scrubbing purification device according to claim 1, characterized in that: The bottom surface of the gas purifier is provided with a sewage outlet, which is connected with the drainage module through a pipeline.

4. The automatic gas wet scrubbing purification device according to claim 1, characterized in that: The liquid replenishing module includes a power device and a washing liquid storage tank, the liquid outlet of the washing liquid storage tank is connected to the liquid inlet of the power device, and the liquid outlet of the power device is connected to the liquid replenishing port arranged on the upper part of the gas purifier through a pipeline.

5. The automatic gas wet scrubbing purification device according to any one of claims 1 to 4, characterized in that: The liquid level online monitoring module adopts an ultrasonic liquid level sensor or a differential pressure liquid level transmitter.

6. An automated gas wet scrubbing purification method, characterized in that: Using the automated gas wet scrubbing purification device as claimed in claim 1, the method is as follows: In the initial state, the liquid level and physical and chemical properties of the washing liquid in the gas purifier are within the set range, the drainage module is not in operation, the liquid replenishment module is not in operation, and the washing liquid in it is sufficient; The pollutant-containing gas enters the aeration module in the gas purifier from the supercharger. The pollutant-containing gas is fully contacted with the scrubbing liquid through aeration. The scrubbing liquid captures or transforms the pollutants in the pollutant-containing gas by physical or chemical methods, turning the pollutant-containing gas into pure gas. The pure gas is further purified by the collector located at the top of the gas purifier and then discharged; When the pollutants captured or converted by the washing liquid in the gas purifier reach a certain amount, its physical and chemical properties change. When the controller collects the physical and chemical properties of the washing liquid measured by the washing liquid online monitoring module and reaches the set value, it outputs a control signal to the drainage module; the drainage module automatically discharges the washing liquid in the gas purifier after responding; when the controller collects the washing liquid level measured by the liquid level online monitoring module and the liquid level is discharged to the lower limit setting value, the control signal is output to the drainage module to stop the drainage action. After the controller collects the state of the drainage module stopping drainage, the control signal is output to the replenishment module to start the replenishment module for automatic replenishment; when the controller collects the washing liquid level measured by the liquid level online monitoring module and reaches the replenishment upper limit setting value, the control signal is output to the replenishment module to stop the replenishment action.

7. The automated gas wet scrubbing purification method according to claim 6, characterized in that: When the automated gas wet scrubbing purification device operates abnormally, the controller will trigger an alarm when the liquid level of the scrubbing liquid measured by the online liquid level monitoring module or the physical and chemical properties of the scrubbing liquid measured by the online scrubbing liquid monitoring module exceed the set range.

8. The automated gas wet scrubbing purification method according to claim 6 or 7, characterized in that: The physical and chemical properties of the washing liquid measured by the liquid level online monitoring module are conductivity or pH or pH value.

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