Desorption system for dispersive adsorption and concentrated desorption of organic solvent waste gas

Abstract

The utility model provides a desorption system for dispersive adsorption and concentrated desorption of organic solvent waste gas, which comprises at least one adsorption tank, one side of the lower part of the adsorption tank is provided with a first interface and is connected with a first three-way electromagnetic valve, and each valve port of the first three-way electromagnetic valve is provided with a first pressure sensor; the top of the adsorption tank is provided with a second interface and is connected with a second three-way electromagnetic valve, each valve port of the second three-way electromagnetic valve is provided with a second pressure sensor, and an adsorption layer in the adsorption tank is provided with a concentration sensor. According to the utility model, the first three-way electromagnetic valve and the second three-way electromagnetic valve are connected with necessary pipelines in a dispersed adsorption place and a concentrated desorption place to form adsorption circulation or desorption circulation, so that the equipment investment is reduced, the transportation is convenient, and the production cost is reduced; when a pipeline is connected, the pressure sensors of the two three-way electromagnetic valves generate pressure signals and transmit the pressure signals to the control end, so that the control end can control the two three-way electromagnetic valves to be opened or closed, and the adsorption and desorption processes are completed.

Description

Technical Field

[0001] The utility model relates to the technical field of wastewater treatment, and more specifically, to a desorption system for dispersedly adsorbing and centrally desorbing organic solvent waste gas. Background Art

[0002] Organic solvents (including ethyl acetate, toluene, ethylbenzene, styrene, formaldehyde, ethanol, tetradecane, etc.) are widely used industrial raw materials. Their organic volatiles are extremely likely to be emitted into the air and pollute the environment. Therefore, it is usually necessary to configure an activated carbon adsorption device for recovery. However, for small and medium-sized enterprises, the equipment investment for installing an activated carbon adsorption and solvent recovery treatment device is large. Therefore, most enterprises without a solvent recovery treatment device directly discharge the waste gas into the atmosphere, causing environmental pollution. For this reason, an exhaust gas treatment system and treatment method with low equipment investment and low operating cost are needed. Summary of the Invention

[0003] In order to solve the deficiencies of the above-mentioned prior art, the purpose of the present utility model is to provide a desorption system for dispersedly adsorbing and centrally desorbing organic solvent waste gas to overcome the defects in the prior art.

[0004] To achieve the above purpose, the present utility model provides a desorption system for dispersedly adsorbing and centrally desorbing organic solvent waste gas. The desorption system includes at least one adsorption tank and a control terminal; an adsorption layer is provided inside the adsorption tank, a first interface is provided on one side of the lower part of the adsorption tank, the first interface is connected to a first pipeline leading into the adsorption tank, and the end of the first pipeline is provided with a first guiding cover facing the adsorption layer; a second guiding cover is provided above the adsorption layer, the top of the second guiding cover is connected to a second pipeline, and the second pipeline forms a second interface at the outer top of the adsorption tank; a first three-way solenoid valve is connected at the first interface, and each valve port of the first three-way solenoid valve is provided with a first pressure sensor; the first three-way solenoid valve is electrically connected and signal-connected to the control terminal so that the control terminal can control each valve port of the first three-way solenoid valve to open or close; the first pressure sensor is electrically connected and signal-connected to the control terminal so that the first pressure sensor can monitor the pressure of each valve port of the first three-way solenoid valve and transmit it to the control terminal; a concentration sensor for monitoring the concentration of the recovered substance is provided in the adsorption layer, and the concentration sensor is electrically connected and signal-connected to the control terminal so that the concentration sensor can monitor the concentration of the recovered substance in the adsorption layer and transmit it to the control terminal; a second three-way solenoid valve is connected at the second interface, and each valve port of the second three-way solenoid valve is provided with a second pressure sensor; the second three-way solenoid valve is electrically connected and signal-connected to the control terminal so that the control terminal can control each valve port of the second three-way solenoid valve to open or close; the second pressure sensor is electrically connected and signal-connected to the control terminal so that the second pressure sensor can monitor the pressure of each valve port of the second three-way solenoid valve and transmit it to the control terminal.

[0005] Through the above technical solution, a first interface with a first three-way solenoid valve is provided on one side of the lower part of the adsorption tank, and a second interface with a second three-way solenoid valve is provided on the top of the adsorption tank. Both the decentralized adsorption site and the centralized desorption site can be connected to the necessary pipelines to form an adsorption cycle or a desorption cycle, which facilitates the transportation of the adsorption tank for decentralized adsorption and centralized desorption. Moreover, pressure sensors are provided at each valve port of the two three-way solenoid valves. When connected to the necessary pipelines, pressure signals are generated and transmitted to the control end. Then, the control end can control the opening or closing of the two three-way solenoid valves. According to the pressure signals, it is also possible to detect whether the pipeline connections are loose, discover problems in a timely manner, avoid the problem of low adsorption and desorption efficiency caused by gas leakage, reduce equipment investment, lower production costs, save energy and protect the environment, and are convenient to use.

[0006] As a further description of the desorption system for decentralized adsorption and centralized desorption of organic solvent waste gas of the present utility model, preferably, the control end is provided with a controller module, a first three-way solenoid valve control module, and a second three-way solenoid valve control module; wherein, the first pressure sensor is electrically connected and signal-connected to the controller module, the controller module is electrically connected and signal-connected to the first three-way solenoid valve control module, and the first three-way solenoid valve control module is electrically connected and signal-connected to the first three-way solenoid valve, so that when the controller module receives the valve port pressure signal from the first pressure sensor, the controller module outputs an opening signal to the first three-way solenoid valve control module, and the first three-way solenoid valve control module controls the corresponding valve port of the first three-way solenoid valve to open; the second pressure sensor is electrically connected and signal-connected to the controller module, the controller module is electrically connected and signal-connected to the second three-way solenoid valve control module, and the second three-way solenoid valve control module is electrically connected and signal-connected to the second three-way solenoid valve, so that when the controller module receives the valve port pressure signal from the second pressure sensor, the controller module outputs an opening signal to the second three-way solenoid valve control module, and the second three-way solenoid valve control module controls the corresponding valve port of the second three-way solenoid valve to open.

[0007] Through the above technical solution, by receiving the pressure signal of the pressure sensor, that is, the corresponding valve port of the three-way solenoid valve has completed the connection. At this time, the three-way solenoid valve can be controlled through the control end, and according to the pressure signal, it is possible to detect whether the pipeline connection is loose, discover problems in a timely manner, and avoid the problem of low adsorption and desorption efficiency caused by gas leakage.

[0008] As a further description of the desorption system for desorbing organic solvent waste gas by dispersed adsorption and centralized desorption according to the present utility model, preferably, the concentration sensor is electrically connected and signal-connected to the controller module, so that the controller module receives the recovered material concentration signal from the concentration sensor during desorption. The controller module outputs a closing signal to the first three-way solenoid valve control module or the second three-way solenoid valve control module according to the recovered material concentration signal. The first three-way solenoid valve control module controls the corresponding valve port of the first three-way solenoid valve to close, or the second three-way solenoid valve control module controls the corresponding valve port of the second three-way solenoid valve to close.

[0009] Through the above technical solution, during the adsorption process, when the concentration of the recovered material adsorbed by the adsorption layer reaches the saturation state, or during the desorption process, when the concentration of the recovered material desorbed by the adsorption layer reaches the lowest value, the concentration sensor sends the recovered material concentration signal to the controller module. Then, the control terminal controls the corresponding valve ports of the first three-way solenoid valve and the second three-way solenoid valve to close according to the connection state and adsorption state of the actual adsorption tank, ending the adsorption process. The adsorption tank is in a closed state, avoiding the entry of other substances during the transportation of the adsorption tank, damaging the adsorption layer, and reducing the adsorption and desorption efficiency.

[0010] As a further description of the desorption system for desorbing organic solvent waste gas by dispersed adsorption and centralized desorption according to the present utility model, preferably, the control terminal is provided with a parameter setting module and a comparison module. The parameter setting module is electrically connected and signal-connected to the comparison module, and the comparison module is electrically connected and signal-connected to the controller module, so that the set value of the valve port pressure and the set value of the recovered material concentration are set through the parameter setting module. When the controller module receives the valve port pressure signal from the first pressure sensor or the second pressure sensor, the comparison module compares whether the valve port pressure signal received by the controller module reaches the set value of the parameter setting module, and outputs an opening signal to the controller module when the set value is reached. And when the controller module receives the recovered material concentration signal from the concentration sensor, the comparison module compares whether the recovered material concentration signal received by the controller module reaches the set value of the parameter setting module, and outputs a closing signal to the controller module when the set value is reached.

[0011] Through the above technical solution, the set value of the valve port pressure and the set value of the recovered material concentration are set through the parameter setting module. When the comparison module compares the valve port pressure signal of the first pressure sensor or the second pressure sensor, it can detect whether the pipeline connection is loose according to the pressure signal, discover problems in time, and avoid the problem of low adsorption and desorption efficiency caused by gas leakage. When the comparison module compares the recovered material concentration signal of the concentration sensor, it can make full use of the adsorption layer and improve the adsorption and desorption efficiency.

[0012] As a further description of the desorption system for dispersed adsorption and centralized desorption of organic solvent waste gas described in the present utility model, preferably, an alarm module is provided at the control end. The alarm module is electrically connected and signal-connected to the comparison module and the controller module respectively, so that when the comparison module compares that the valve port pressure signal received by the controller module does not reach the set value of the parameter setting module, the comparison module outputs a trigger signal to the alarm module, thereby triggering the alarm module to emit a prompt sound.

[0013] Through the above technical solution, when the comparison module compares and obtains that the valve port pressure signal generated by the first pressure sensor or the second pressure sensor is less than the set value, there may be a situation where the pipeline connected to the corresponding valve port is loose or not properly connected. Setting the alarm module to emit a prompt sound can timely detect problems and avoid the problem of low adsorption and desorption efficiency caused by gas leakage.

[0014] To achieve another object of the present utility model, the present utility model also provides a method for dispersed adsorption and centralized desorption of organic solvent waste gas using the described desorption system. The method includes the following steps:

[0015] 1) At the dispersed adsorption site, connect the first interface of the adsorption tank to the waste gas discharge port through the first three-way solenoid valve (3), and connect the second interface of the adsorption tank to the purified gas discharge pipeline through the second three-way solenoid valve;

[0016] 2) During waste gas adsorption, first, the control end controls the first three-way solenoid valve and the second three-way solenoid valve to open the corresponding valve ports, and then introduce waste gas for the adsorption layer in the adsorption tank to absorb the substances to be recovered in the waste gas;

[0017] 3) Monitor whether the concentration of the recovered substance is saturated through the concentration sensor. When the concentration of the recovered substance in the adsorption tank rises to the set saturation value, the control end controls the first three-way solenoid valve and the second three-way solenoid valve to close the corresponding valve ports, and then separate the first three-way solenoid valve from the waste gas discharge port and separate the second three-way solenoid valve from the purified gas discharge pipeline;

[0018] 4) Select a new adsorption tank for replacement, repeat steps 1)-3), and then continue adsorption;

[0019] 5) Transport the saturated adsorption tank to the desorption center, connect the second interface of the adsorption tank to the desorption pipeline through the second three-way solenoid valve, and connect the first interface of the adsorption tank to the condensation pipeline through the first three-way solenoid valve;

[0020] 6) During the desorption of the recovered substance, first, the control end controls the second three-way solenoid valve and the first three-way solenoid valve to open the corresponding valve ports, and then introduce desorption gas to desorb the substances to be recovered absorbed by the adsorption layer in the adsorption tank, and discharge them from the first interface of the adsorption tank to the condensation pipeline for subsequent treatment;

[0021] 7) Monitor the concentration of the recyclable materials through the concentration sensor. When the concentration of the recyclable materials in the adsorption tank decreases to the set value, the control terminal controls the second three-way solenoid valve and the first three-way solenoid valve to close the corresponding valve ports, then separates the second three-way solenoid valve from the desorption pipeline and separates the first three-way solenoid valve from the condensation pipeline; the adsorption tank after desorption is transported back to the decentralized adsorption site as a reserve tank for replacement.

[0022] Through the above technical solution, a method for decentralized adsorption and centralized desorption of organic solvent waste gas is adopted. After connecting the adsorption tank with the waste gas discharge port and the purified gas discharge pipeline at the decentralized adsorption site, an adsorption cycle is formed. Then, the adsorption process is completed through the control of the control terminal. At the centralized desorption site, the desorption pipeline and the condensation pipeline required for desorption are set up. After connecting the adsorption tank with the desorption pipeline and the condensation pipeline, a desorption cycle is formed. Then, the desorption process is completed through the control of the control terminal. Only the adsorption tank needs to be transported between the decentralized adsorption site and the centralized desorption site, and only one set of other necessary equipment is required, which can reduce equipment investment, lower production costs.

[0023] The beneficial effects of the present utility model are as follows: The present utility model is provided with a first interface with a first three-way solenoid valve on one side of the lower part of the adsorption tank and a second interface with a second three-way solenoid valve on the top of the adsorption tank. At both the decentralized adsorption site and the centralized desorption site, it can be connected with the necessary pipelines to form an adsorption cycle or a desorption cycle, which is convenient for the transportation of the adsorption tank in decentralized adsorption and centralized desorption. Moreover, pressure sensors are provided at each valve port of the two three-way solenoid valves. When connected with the necessary pipelines, a pressure signal is generated and transmitted to the control terminal. Then, the control terminal can control the opening or closing of the two three-way solenoid valves. According to the pressure signal, it can also detect whether the pipeline connection is loose, discover problems in time, and avoid the problem of low adsorption and desorption efficiency caused by gas leakage, which can reduce equipment investment, lower production costs, save energy and protect the environment, and is convenient to use. Description of the Drawings

[0024] Figure 1 It is a schematic structural diagram of the adsorption tank of the present utility model;

[0025] Figure 2 It is a structural block diagram of the desorption system of the present utility model;

[0026] Figure 3 It is a structural block diagram of the parameter setting module and the comparison module of the present utility model;

[0027] Figure 4 It is a structural block diagram of the alarm module of the present utility model.

[0028] In the figure: adsorption tank 1, adsorption layer 11, first interface 12, first pipeline 13, first guide cover 14, second guide cover 15, second pipeline 16, second interface 17, control end 2, controller module 21, first three-way solenoid valve control module 22, second three-way solenoid valve control module 23, parameter setting module 24, comparison module 25, alarm module 26, first three-way solenoid valve 3, first pressure sensor 31, concentration sensor 4, second three-way solenoid valve 5, second pressure sensor 51. Detailed implementation

[0029] In order to further understand the structure, features and other purposes of the present invention, the following is a detailed description with reference to the attached preferred embodiments and accompanying drawings. The embodiments described by the drawings are only used to illustrate the technical solutions of the present invention and do not limit the present invention.

[0030] In the first embodiment of the present invention, as Figure 1 shown, the present invention provides a desorption system for dispersed adsorption and centralized desorption of organic solvent waste gas. The desorption system includes at least one adsorption tank 1 and a control end 2. An adsorption layer 11 is provided inside the adsorption tank 1. A first interface 12 is provided on one side of the lower part of the adsorption tank 1. The first interface 12 is connected to a first pipeline 13 leading into the adsorption tank 1. The end of the first pipeline 13 is provided with a first guide cover 14 facing the adsorption layer 11. A second guide cover 15 is provided above the adsorption layer 11. The top of the second guide cover 15 is connected to a second pipeline 16. The second pipeline 16 forms a second interface 17 at the outer top of the adsorption tank 1.

[0031] A first three-way solenoid valve 3 is connected at the first interface 12. Each valve port of the first three-way solenoid valve 3 is provided with a first pressure sensor 31. The first three-way solenoid valve 3 is electrically connected and signal-connected to the control end 2 so that the control end 2 can control each valve port of the first three-way solenoid valve 3 to open or close. The first pressure sensor 31 is electrically connected and signal-connected to the control end 2 so that the first pressure sensor 31 can monitor the pressure of each valve port of the first three-way solenoid valve 3 and transmit it to the control end 2. During dispersed adsorption, the first interface 12 can be used to connect to the waste gas discharge port, and the waste gas to be adsorbed is introduced through the first interface 12. During centralized desorption, the first interface 12 can be used to connect to the condensation pipeline, and the recovered substances are discharged through the first interface 12. The first interface 12 can be connected to different pipelines according to actual needs.

[0032] A first three-way solenoid valve 3 is provided at a first interface 12. A first valve port of the first three-way solenoid valve 3 is connected to the first interface 12, a second valve port of the first three-way solenoid valve 3 is connected to an exhaust gas outlet, and a third valve port of the first three-way solenoid valve 3 can also be connected as required. Since a first pressure sensor 31 is provided at each valve port of the first three-way solenoid valve 3, after the first valve port of the first three-way solenoid valve 3 is connected to the first interface 12, the first pressure sensor 31 at this valve port generates a pressure signal and feeds it back to a control end 2, and the control end 2 can then control the opening or closing of this valve port. Each valve port of the first three-way solenoid valve 3 is connected to the first interface 12 or other pipelines through a flange, and the pressure signal generated by the first pressure sensor 31 after connection and when the first three-way solenoid valve 3 is in a sealed state is obtained through pre-testing.

[0033] A concentration sensor 4 for monitoring the concentration of the recovered material is provided in an adsorption layer 11. The concentration sensor 4 is electrically connected and signal-connected to the control end 2 so that the concentration sensor 4 monitors the concentration of the recovered material in the adsorption layer 11 and transmits it to the control end 2. The saturation concentration when the adsorption layer 11 adsorbs various recovered materials and the lowest concentration during desorption are obtained through pre-testing, which is convenient for subsequent use.

[0034] A second three-way solenoid valve 5 is connected at a second interface 17. A second pressure sensor 51 is provided at each valve port of the second three-way solenoid valve 5. The second three-way solenoid valve 5 is electrically connected and signal-connected to the control end 2 so that the control end 2 controls the opening or closing of each valve port of the second three-way solenoid valve 5. The second pressure sensor 51 is electrically connected and signal-connected to the control end 2 so that the second pressure sensor 51 monitors the pressure of each valve port of the second three-way solenoid valve 5 and transmits it to the control end 2. In the decentralized adsorption area, the second interface 17 can be used to connect to a purified gas discharge pipeline, and the purified gas is discharged from the second interface 17. In the centralized desorption area, the second interface 17 can be used to connect to a desorption pipeline, and the desorption gas is introduced from the second interface 17. The second interface 17 can be connected to different pipelines according to actual needs. Similarly to the first interface 12, a second three-way solenoid valve 5 is provided at the second interface 17, which is connected to the pipelines in adsorption or desorption according to real-time usage needs, and the second pressure sensor 51 generates a pressure signal and feeds it back to the control end 2, and the control end 2 can then control the opening or closing of this valve port. Each valve port of the second three-way solenoid valve 5 is connected to the second interface 17 or other pipelines through a flange, and the pressure signal generated by the second pressure sensor 51 after connection and when the second three-way solenoid valve 5 is in a sealed state is obtained through pre-testing.

[0035] In this embodiment, to facilitate the transportation of the adsorption tank 1 for decentralized adsorption and centralized desorption, a first interface 12 with a first three-way solenoid valve 3 is provided on one side of the lower part of the adsorption tank 1, and a second interface 17 with a second three-way solenoid valve 5 is provided at the top of the adsorption tank 1. At the decentralized adsorption site and the centralized desorption site, it can be connected to the necessary pipelines to form an adsorption cycle or a desorption cycle. Pressure sensors are provided at each valve port of the two three-way solenoid valves. When connected to the necessary pipelines, a pressure signal is generated and transmitted to the control end. Thus, the control end can control the opening or closing of the two three-way solenoid valves, and according to the pressure signal, it can detect whether the pipeline connection is loose, promptly discover problems, avoid the problem of low adsorption and desorption efficiency caused by gas leakage, reduce equipment investment, lower production costs, save energy and protect the environment, and is convenient to use.

[0036] In the second embodiment of the present utility model, as Figure 2 shown, the control end 2 is provided with a controller module 21, a first three-way solenoid valve control module 22, and a second three-way solenoid valve control module 23.

[0037] The first pressure sensor 31 is electrically connected and signal-connected to the controller module 21. The controller module 21 is electrically connected and signal-connected to the first three-way solenoid valve control module 22. The first three-way solenoid valve control module 22 is electrically connected and signal-connected to the first three-way solenoid valve 3. When the controller module 21 receives the valve port pressure signal from the first pressure sensor 31, the controller module 21 outputs an opening signal to the first three-way solenoid valve control module 22, and the first three-way solenoid valve control module 22 controls the corresponding valve port of the first three-way solenoid valve 3 to open. The three valve ports of the first three-way solenoid valve 3 are set as A1, A2, and A3. Correspondingly, the first pressure sensors 31 at the three valve ports are set as a1, a2, and a3. After the valve port A1 of the first three-way solenoid valve 3 is connected to the first interface 12, its pressure sensor a1 generates a pressure signal and wirelessly transmits it to the controller module 21. At this time, the controller module 21 outputs an opening signal to the first three-way solenoid valve control module 22, and the first three-way solenoid valve control module 22 then controls the valve port A1 of the first three-way solenoid valve 3 to open, and the first three-way solenoid valve 3 communicates with the first pipeline 13. Similarly, after the valve port A2 and the valve port A3 of the first three-way solenoid valve 3 are connected to other pipelines, they can be controlled by the control end 2.

[0038] The second pressure sensor 51 is electrically and signal - connected to the controller module 21. The controller module 21 is electrically and signal - connected to the second three - way solenoid valve control module 23. The second three - way solenoid valve control module 23 is electrically and signal - connected to the second three - way solenoid valve 5. When the controller module 21 receives the valve port pressure signal from the second pressure sensor 51, the controller module 21 outputs an opening signal to the second three - way solenoid valve control module 23, and the second three - way solenoid valve control module 23 controls the corresponding valve port of the second three - way solenoid valve 5 to open. Similarly to the first three - way solenoid valve 3, the three valve ports of the second three - way solenoid valve 5 are set as B1, B2, and B3. Correspondingly, the first pressure sensors 31 at the three valve ports are set as b1, b2, and b3, and can be controlled by the control end 2.

[0039] In this embodiment, by receiving the pressure signal of the pressure sensor, the corresponding valve port of the three - way solenoid valve is connected. At this time, the three - way solenoid valve can be controlled through the control end 2, and according to the pressure signal, it can be detected whether the pipeline connection is loose, timely discover problems, and avoid the problem of low adsorption and desorption efficiency caused by gas leakage.

[0040] In the third embodiment of the present utility model, as Figure 2 shown, the concentration sensor 4 is electrically and signal - connected to the controller module 21, so that the controller module 21 receives the recovered material concentration signal from the concentration sensor 4 during desorption. The controller module 21 outputs a closing signal to the first three - way solenoid valve control module 22 or the second three - way solenoid valve control module 23 according to the recovered material concentration signal. The first three - way solenoid valve control module 22 controls the corresponding valve port of the first three - way solenoid valve 3 to close, or the second three - way solenoid valve control module 23 controls the corresponding valve port of the second three - way solenoid valve 5 to close.

[0041] In this embodiment, during the adsorption process, when the concentration of the recovered material adsorbed by the adsorption layer 11 reaches the saturation state, or during the desorption process, when the concentration of the recovered material desorbed by the adsorption layer 11 reaches the lowest value, the concentration sensor 4 sends a recovered material concentration signal to the controller module 21, and then the control end controls the corresponding valve ports of the first three - way solenoid valve 3 and the second three - way solenoid valve 5 to close according to the actual connection state and adsorption state of the adsorption tank 1, ending the adsorption process. The adsorption tank 1 is in a closed state, avoiding other substances from entering during the transportation of the adsorption tank 1 and damaging the adsorption layer 11, resulting in a reduction in adsorption and desorption efficiency.

[0042] In the fourth embodiment of the present utility model, as Figure 3As shown in the figure, the control terminal 2 is provided with a parameter setting module 24 and a comparison module 25. The parameter setting module 24 is electrically and signal-connected to the comparison module 25, and the comparison module 25 is electrically and signal-connected to the controller module 21. The parameter setting module 24 is used to set the set value of the valve port pressure and the set value of the concentration of the recycled material. When the controller module 21 receives the valve port pressure signal from the first pressure sensor 31 or the second pressure sensor 51, the comparison module 25 compares whether the valve port pressure signal received by the controller module 21 reaches the set value of the parameter setting module 24, and outputs an open signal to the controller module 21 when the set value is reached. When the controller module 21 receives the recycled material concentration signal from the concentration sensor 4, the comparison module 25 compares whether the recycled material concentration signal received by the controller module 21 reaches the set value of the parameter setting module 24, and outputs a close signal to the controller module 21 when the set value is reached.

[0043] In this embodiment, the set value of the valve port pressure and the set value of the concentration of the recycled material are set through the parameter setting module 24. When the comparison module 25 compares the valve port pressure signal of the first pressure sensor 31 or the second pressure sensor 51, it can detect whether the pipeline connection is loose according to the pressure signal, discover problems in time, and avoid the problem of low adsorption and desorption efficiency caused by gas leakage. When the comparison module 25 compares the recycled material concentration signal of the concentration sensor 4, it can make full use of the adsorption layer 11 to improve the adsorption and desorption efficiency.

[0044] In the fifth embodiment of the present invention, as Figure 4 shown, the control terminal 2 is provided with an alarm module 26. The alarm module 26 is electrically and signal-connected to the comparison module 25 and the controller module 21 respectively, so that when the comparison module 25 compares that the valve port pressure signal received by the controller module 21 does not reach the set value of the parameter setting module 24, the comparison module 25 outputs a trigger signal to the alarm module 26, thereby triggering the alarm module 26 to emit a prompt sound.

[0045] In this embodiment, the set value of the valve port pressure set by the parameter setting module 24 is the pressure signal generated by the pressure sensor after the three-way solenoid valve is connected to the pipeline and in a sealed state, which is obtained through pre-testing. When the comparison module 25 compares that the valve port pressure signal generated by the first pressure sensor 31 or the second pressure sensor 51 is less than the set value, the pipeline connected to the corresponding valve port may be loose or not connected properly. Setting the alarm module 26 to emit a prompt sound can discover problems in time and avoid the problem of low adsorption and desorption efficiency caused by gas leakage.

[0046] In the sixth embodiment of the present invention, the present invention proposes a method for dispersing adsorption and concentrating desorption of organic solvent waste gas by using the desorption system described above.

[0047] At the decentralized adsorption site, first, connect the first interface 12 of the adsorption tank 1 to the waste gas discharge port through the first three-way solenoid valve 3, and connect the second interface 17 of the adsorption tank 1 to the purified gas discharge pipeline through the second three-way solenoid valve 5. Then, during waste gas adsorption, first, the control terminal 2 controls the first three-way solenoid valve 3 and the second three-way solenoid valve 5 to open the corresponding valve ports, and then introduce the waste gas. The adsorption layer 11 in the adsorption tank 1 absorbs the substances to be recovered in the waste gas. The concentration sensor 4 can monitor whether the concentration of the recovered substances is saturated. When the concentration of the recovered substances in the adsorption tank 1 rises to the set saturation value, the control terminal 2 controls the first three-way solenoid valve 3 and the second three-way solenoid valve 5 to close the corresponding valve ports, and then separate the first three-way solenoid valve 3 from the waste gas discharge port and separate the second three-way solenoid valve 5 from the purified gas discharge pipeline. Furthermore, a new adsorption tank 1 can be selected for replacement, repeat the above process, and then continue the adsorption.

[0048] At the centralized desorption site, that is, transport the adsorption tank 1 that has reached saturation at the decentralized adsorption site to the desorption center. First, connect the second interface 17 of the adsorption tank 1 to the desorption pipeline through the second three-way solenoid valve 5, and connect the first interface 12 of the adsorption tank 1 to the condensation pipeline through the first three-way solenoid valve 3. Then, during the desorption of the recovered substances, first, the control terminal 2 controls the second three-way solenoid valve 5 and the first three-way solenoid valve 3 to open the corresponding valve ports, and then introduce the desorption gas to desorb the substances to be recovered absorbed by the adsorption layer 11 in the adsorption tank 1, and discharge them from the first interface 12 of the adsorption tank 1 to the condensation pipeline for subsequent processing. The concentration sensor 4 monitors the concentration of the recovered substances. When the concentration of the recovered substances in the adsorption tank 1 drops to the set value, the control terminal 2 controls the second three-way solenoid valve 5 and the first three-way solenoid valve 3 to close the corresponding valve ports, and then separate the second three-way solenoid valve 5 from the desorption pipeline and separate the first three-way solenoid valve 3 from the condensation pipeline. After desorption, the adsorption tank 1 is transported back to the decentralized adsorption site as a reserve tank for replacement.

[0049] In the present embodiment, a method for decentralized adsorption and centralized desorption of organic solvent waste gas is adopted. After connecting the adsorption tank 1 to the waste gas discharge port and the purified gas discharge pipeline at the decentralized adsorption site, an adsorption cycle is formed. Then, the adsorption process is completed through the control of the control terminal. At the centralized desorption site, set the desorption pipeline and the condensation pipeline required for desorption, and after connecting the adsorption tank 1 to the desorption pipeline and the condensation pipeline, a desorption cycle is formed. Then, the desorption process is completed through the control of the control terminal. Only the adsorption tank 1 needs to be transported between the decentralized adsorption site and the centralized desorption site, and only one set of other necessary equipment is required, which can reduce equipment investment and production costs.

[0050] It should be noted that the above-mentioned invention content and specific implementation manners are intended to prove the practical application of the technical solution provided by the present utility model, and should not be construed as a limitation on the protection scope of the present utility model. Those skilled in the art can make various modifications, equivalent substitutions or improvements within the spirit and principle of the present utility model. The protection scope of the present utility model shall be subject to the appended claims.

Claims

1. A desorption system for desorbing organic solvent waste gas by dispersed adsorption and centralized desorption, characterized in that, The desorption system includes at least one adsorption tank (1) and a control terminal (2); An adsorption layer (11) is provided inside the adsorption tank (1). On one side of the lower part of the adsorption tank (1), there is a first interface (12). The first interface (12) is connected to a first pipeline (13) leading into the adsorption tank (1). The end of the first pipeline (13) is provided with a first guiding cover (14) facing the adsorption layer (11). Above the adsorption layer (11), there is a second guiding cover (15). The top end of the second guiding cover (15) is connected to a second pipeline (16), and the second pipeline (16) forms a second interface (17) at the outer top of the adsorption tank (1); A first three-way solenoid valve (3) is connected at the first interface (12). Each valve port of the first three-way solenoid valve (3) is provided with a first pressure sensor (31); the first three-way solenoid valve (3) is electrically connected and signal-connected to the control terminal (2) so that the control terminal (2) can control the opening or closing of each valve port of the first three-way solenoid valve (3); the first pressure sensor (31) is electrically connected and signal-connected to the control terminal (2) so that the first pressure sensor (31) can monitor the pressure of each valve port of the first three-way solenoid valve (3) and transmit it to the control terminal (2); A concentration sensor (4) for monitoring the concentration of the recovered substance is provided in the adsorption layer (11). The concentration sensor (4) is electrically connected and signal-connected to the control terminal (2) so that the concentration sensor (4) can monitor the concentration of the recovered substance in the adsorption layer (11) and transmit it to the control terminal (2); A second three-way solenoid valve (5) is connected at the second interface (17). Each valve port of the second three-way solenoid valve (5) is provided with a second pressure sensor (51); the second three-way solenoid valve (5) is electrically connected and signal-connected to the control terminal (2) so that the control terminal (2) can control the opening or closing of each valve port of the second three-way solenoid valve (5); the second pressure sensor (51) is electrically connected and signal-connected to the control terminal (2) so that the second pressure sensor (51) can monitor the pressure of each valve port of the second three-way solenoid valve (5) and transmit it to the control terminal (2).

2. The desorption system according to claim 1, wherein The control terminal (2) is provided with a controller module (21), a first three-way solenoid valve control module (22) and a second three-way solenoid valve control module (23); among them, The first pressure sensor (31) is electrically connected and signal-connected to the controller module (21). The controller module (21) is electrically connected and signal-connected to the first three-way solenoid valve control module (22). The first three-way solenoid valve control module (22) is electrically connected and signal-connected to the first three-way solenoid valve (3) so that when the controller module (21) receives a valve port pressure signal from the first pressure sensor (31), the controller module (21) outputs an opening signal to the first three-way solenoid valve control module (22), and the first three-way solenoid valve control module (22) controls the corresponding valve port of the first three-way solenoid valve (3) to open; The second pressure sensor (51) is electrically and signal-connected to the controller module (21), the controller module (21) is electrically and signal-connected to the second three-way solenoid valve control module (23), and the second three-way solenoid valve control module (23) is electrically and signal-connected to the second three-way solenoid valve (5), so that when the controller module (21) receives the valve port pressure signal from the second pressure sensor (51), the controller module (21) outputs an opening signal to the second three-way solenoid valve control module (23), and the second three-way solenoid valve control module (23) controls the corresponding valve port of the second three-way solenoid valve (5) to open.

3. The desorption system according to claim 2, wherein The concentration sensor (4) is electrically and signal-connected to the controller module (21), so that the controller module (21) receives the recovered material concentration signal from the concentration sensor (4) during desorption, and the controller module (21) outputs a closing signal to the first three-way solenoid valve control module (22) or the second three-way solenoid valve control module (23) according to the recovered material concentration signal. The first three-way solenoid valve control module (22) controls the corresponding valve port of the first three-way solenoid valve (3) to close, or the second three-way solenoid valve control module (23) controls the corresponding valve port of the second three-way solenoid valve (5) to close.

4. The desorption system according to claim 2, wherein, The control terminal (2) is provided with a parameter setting module (24) and a comparison module (25). The parameter setting module (24) is electrically and signal-connected to the comparison module (25), and the comparison module (25) is electrically and signal-connected to the controller module (21), so that the set value of the valve port pressure and the set value of the recovered material concentration are set through the parameter setting module (24). When the controller module (21) receives the valve port pressure signal from the first pressure sensor (31) or the second pressure sensor (51), the comparison module (25) compares whether the valve port pressure signal received by the controller module (21) reaches the set value of the parameter setting module (24), and outputs an opening signal to the controller module (21) when the set value is reached. And when the controller module (21) receives the recovered material concentration signal from the concentration sensor (4), the comparison module (25) compares whether the recovered material concentration signal received by the controller module (21) reaches the set value of the parameter setting module (24), and outputs a closing signal to the controller module (21) when the set value is reached.

5. The desorption system according to claim 4, wherein The control terminal (2) is provided with an alarm module (26). The alarm module (26) is electrically and signal-connected to the comparison module (25) and the controller module (21) respectively, so that when the comparison module (25) compares that the valve port pressure signal received by the controller module (21) does not reach the set value of the parameter setting module (24), the comparison module (25) outputs a trigger signal to the alarm module (26), thereby triggering the alarm module (26) to emit a prompt sound.

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