Multifunctional VOCs adsorption catalytic regeneration system

Abstract

The utility model relates to a multifunctional VOCs (Volatile Organic Compounds) adsorption catalytic regeneration system which comprises a gas generation mixing device, an adsorption device, a catalytic combustion device, an ozone generation device, a gas chromatograph and a gas purification device, a gas outlet of the gas generation mixing device is connected with a first main pipe, and a gas inlet of the adsorption device is connected with the first main pipe; a gas inlet of the catalytic combustion device is connected with the first main pipe, a gas outlet of the adsorption device is connected with a second main pipe, a gas inlet of the catalytic combustion device is connected with the second main pipe, a gas outlet of the catalytic combustion device is connected with a fourth main pipe, the second main pipe is connected with the fourth main pipe, and a gas inlet of the gas chromatograph is connected with the fourth main pipe; a gas inlet of the gas purification device is connected with the fourth main pipe, and a gas outlet of the ozone generation device is connected with a gas inlet of the catalytic combustion device. The device has the beneficial effects that multiple experiments of single or multiple VOCs gas can be carried out, and the device can be used for experiment teaching and scientific research as well as atmospheric VOCs advanced treatment engineering research and design experiments.

Description

Technical Field

[0001] The utility model belongs to the technical field of environmental engineering, and in particular relates to a multifunctional VOCs adsorption catalysis regeneration system. Background Art

[0002] VOC adsorption / catalytic combustion technology is considered a cost-effective method for removing VOCs from the atmosphere. Using this technology for advanced treatment of VOCs in industrial exhaust can significantly improve atmospheric environmental quality. Research has shown that adsorption / catalytic combustion is one of the primary methods for treating VOCs in industrial exhaust.

[0003] Due to the wide variety, wide sources and complex composition of VOCs, the difficulty of treatment and the weak management foundation have made it a shortcoming in atmospheric environmental management. Therefore, it is necessary to establish a faster laboratory-scale device to compare the effectiveness of different treatment methods and specify design standards. Existing adsorption or catalytic combustion experimental devices have the following defects: First, the experiment lasts for a long time. For low-content VOCs pollutant adsorption experiments, it can last for several months and cannot be used in experimental teaching; second, the demand for active adsorbents or catalysts is large and complex, and the operating cost is high; third, the function is single, and only simple dynamic adsorption or catalytic combustion experiments can be carried out; fourth, the adsorption columns are mostly fixed, and the existing experimental devices and conditions cannot represent the on-site conditions of the treatment plant installed in the fixed bed reactor in the factory. Utility Model Content

[0004] The purpose of the utility model is to overcome the shortcomings of the existing technology and provide a multifunctional VOCs adsorption catalytic regeneration system, which can carry out multiple experiments on single or multiple VOCs gases. It has a small size, short test time, simple operation, low operating cost and diverse functions. It can be used for experimental teaching and scientific research as well as atmospheric VOCs deep treatment engineering research and design experiments.

[0005] The purpose of this utility model is achieved through the following technical solutions:

[0006] A multifunctional VOCs adsorption catalytic regeneration system includes a gas generating and mixing device, an adsorption device, a catalytic combustion device, an ozone generating device, a gas chromatograph, and a gas purification device. The gas outlet of the gas generating and mixing device is connected to a first main pipe, the gas inlet of the adsorption device is connected to the first main pipe through a first branch pipe, the gas inlet of the catalytic combustion device is connected to the first main pipe through a second branch pipe, the gas outlet of the adsorption device is connected to the second main pipe, the gas inlet of the catalytic combustion device is connected to the second main pipe through a third branch pipe, the gas outlet of the catalytic combustion device is connected to a fourth main pipe through the third main pipe, the second main pipe is connected to the fourth main pipe through a fourth branch pipe, the gas inlet of the gas chromatograph is connected to the fourth main pipe through a fifth branch pipe, the gas inlet of the gas purification device is connected to the fourth main pipe through a sixth branch pipe, and the gas outlet of the ozone generating device is connected to the gas inlet of the catalytic combustion device through the fifth main pipe.

[0007] Furthermore, the gas generating and mixing device includes a compressed gas tank, a filter, a gas generator 1, a gas generator 2, and a gas mixing tank. The air inlet of the filter is connected to the air outlet of the compressed gas tank through a pipeline. The air outlet of the filter is connected to the air inlet of the gas mixing tank, the air inlet of gas generator 1, and the air inlet of gas generator 2 through pipelines. The air outlet of gas generator 1 and the air outlet of gas generator 2 are connected to the air inlet of the gas mixing tank through pipelines. The air outlet of the gas mixing tank is connected to a first main pipe. Gas generator 1 and gas generator 2 are both electrically connected to a temperature controller. A heating device 1 is mounted on the outside of the gas mixing tank.

[0008] Furthermore, a mass flow controller, a needle valve 1, and a one-way valve 1 are sequentially provided along the gas flow direction of the connecting pipelines between the filter and the gas mixing tank, the first gas generator, and the second gas generator.

[0009] Furthermore, a temperature sensor and a pressure sensor are provided in the gas mixing tank, the temperature sensor is electrically connected to the heating device 1, a safety valve is provided on the first main pipe at the gas outlet of the gas mixing tank, and the pressure sensor is connected to the safety valve.

[0010] Furthermore, the catalytic combustion device includes a catalytic combustion column, a catalyst support plate, and a second heating device. The second heating device is sleeved on the outside of the catalytic combustion column, and a catalyst support plate is provided inside the catalytic combustion column. The top air inlet of the catalytic combustion column is connected to the first main pipe through a second branch pipe. A needle valve three and a one-way valve three are provided in sequence on the second branch pipe along the direction of gas flow. The bottom air outlet of the catalytic combustion column is connected to the fourth main pipe through the third main pipe, and a needle valve six is ​​provided on the third main pipe.

[0011] Furthermore, the adsorption device includes an adsorption column, an adsorbent support plate, and a heating device three. The adsorption column is externally sleeved with a heating device three, and an adsorbent support plate is provided inside the adsorption column. The top air inlet of the adsorption column is connected to the first main pipe through a first branch pipe, and a needle valve two and a one-way valve two are provided in sequence on the first branch pipe along the direction of gas flow. The bottom air outlet of the adsorption column is connected to the second main pipe, and the top air inlet of the catalytic combustion column is connected to the second main pipe through a third branch pipe, and a needle valve four and a one-way valve four are provided in sequence on the third branch pipe along the direction of gas flow, and a needle valve nine is provided on the fourth branch pipe.

[0012] Furthermore, the ozone generating device includes an oxygen cylinder and an ozone generator. The gas outlet of the oxygen cylinder is connected to the gas inlet of the ozone generator through a pipeline. The gas outlet of the ozone generator is connected to the top gas inlet of the catalytic combustion column through a fifth main pipe. A needle valve five and a one-way valve five are sequentially provided on the fifth main pipe along the direction of gas flow.

[0013] Furthermore, the gas inlet of the gas chromatograph is connected to the fourth main pipe through a fifth branch pipe, and a needle valve seven is provided on the fifth branch pipe.

[0014] Furthermore, the gas purification device includes an ethanol absorption liquid tank and an activated carbon absorption tank. The gas outlet of the ethanol absorption liquid tank is connected to the gas inlet of the activated carbon absorption tank through a pipeline. The gas inlet of the ethanol absorption liquid tank is connected to the fourth main pipe through the sixth branch pipe. The sixth branch pipe is provided with a needle valve 8.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. This utility model integrates VOCs dynamic adsorption experiment, catalytic combustion experiment, catalytic ozone combustion experiment, adsorption-catalysis combined experiment, and adsorbent in-situ regeneration experiment, and can be used for experimental teaching and scientific research as well as atmospheric VOCs deep treatment engineering research and design experiments.

[0017] 2. The utility model has a simple overall structure, small footprint, easy use, low cost, simple operation, and can carry out multiple atmospheric VOCs gas treatment experiments.

[0018] 3. The utility model can realize precise concentration control of single or multiple VOCs gases of different types and concentrations in the mixing tank. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0020] Figure 2 This is a schematic structural diagram of the gas generating and mixing device in the present utility model;

[0021] Figure 3 This is a schematic diagram of the structure of the utility model after removing the gas generating mixing device.

[0022] In the figure: 1. Gas generating and mixing device; 10. Compressed gas tank; 11. Filter; 12. Gas generator 1; 13. Gas generator 2; 14. Gas mixing tank; 15. Temperature controller; 16. Heating device 1; 17. Mass flow controller; 18. Needle valve 1; 19. One-way valve 1; 2. Adsorption device; 20. Adsorption column; 21. Adsorbent support plate; 22. Heating device 3; 23. Needle valve 2; 24. One-way valve 2; 3. Catalytic combustion device; 30. Catalytic combustion Column; 31. Catalyst support plate; 32. Heating device 2; 33. Needle valve 3; 34. One-way valve 3; 35. Needle valve 4; 36. One-way valve 4; 37. Needle valve 6; 4. Ozone generator; 40. Oxygen cylinder; 41. Ozone generator; 42. Needle valve 5; 43. One-way valve 5; 5. Gas chromatograph; 51. Needle valve 7; 6. Gas purification device; 61. Ethanol absorption liquid tank; 62. Activated carbon absorption tank; 63. Needle valve 8; 7. Safety valve; 8. Needle valve 9. DETAILED DESCRIPTION

[0023] The present invention will be further described below in conjunction with the accompanying drawings, but the protection scope of the present invention is not limited to the following description.

[0024] like Figure 1 As shown, a multifunctional VOCs adsorption catalytic regeneration system can be used to conduct multiple experiments such as dynamic adsorption, catalytic combustion, catalytic ozone combustion, adsorption-catalysis combination, and in-situ adsorbent regeneration of single or multiple VOCs gases. The system includes a gas generating and mixing device 1, an adsorption device 2, a catalytic combustion device 3, an ozone generating device 4, a gas chromatograph 5, and a gas purification device 6. The gas outlet of the gas generating and mixing device 1 is connected to a first main pipe, the gas inlet of the adsorption device 2 is connected to the first main pipe via a first branch pipe, the gas inlet of the catalytic combustion device 3 is connected to the first main pipe via a second branch pipe, the gas outlet of the adsorption device 2 is connected to a second main pipe, the gas inlet of the catalytic combustion device 3 is connected to the second main pipe via a third branch pipe, the gas outlet of the catalytic combustion device 3 is connected to a fourth main pipe via the third main pipe, the second main pipe is connected to the fourth main pipe via a fourth branch pipe, the gas inlet of the gas chromatograph 5 is connected to the fourth main pipe via a fifth branch pipe, the gas inlet of the gas purification device 6 is connected to the fourth main pipe via a sixth branch pipe, and the gas outlet of the ozone generating device 4 is connected to the gas inlet of the catalytic combustion device 3 via a fifth main pipe.

[0025] The gas generating and mixing device 1 is used to provide compressed gas and different types of VOCs gas, and can control the concentration of VOCs gas, and then mix the gases to form simulated exhaust gas; the adsorption device 2 is provided with an adsorbent, and the compressed gas and VOCs gas are mixed and passed into the adsorption device 2 to carry out a dynamic adsorption experiment; the catalytic combustion device 3 is provided with a catalyst, and the compressed gas and VOCs gas are mixed and passed into the catalytic combustion device 3 to carry out a catalytic combustion experiment; the mixed gas adsorbed by the adsorption device 2 is passed into the catalytic combustion device 3 to carry out an adsorption-catalysis combined experiment; the ozone generating device 4 is used to provide ozone, and the compressed gas and VOCs gas are mixed and directly passed into the catalytic combustion device 3 at the same time as the ozone to carry out an ozone catalytic combustion experiment; the mixed gas adsorbed by the adsorption device 2 and the ozone are passed into the catalytic combustion device 3 to carry out an adsorption-ozone catalysis combined experiment; the gas after the experiment can be passed into a gas chromatograph 5 for concentration testing or passed into a purification device for purification treatment and then discharged. After the above experiment, compressed gas is passed into the adsorption device 2, and the adsorbent in the adsorption device 2 can be regenerated by the compressed gas, and then the adsorbent in situ regeneration experiment is carried out. The waste gas generated after the regeneration experiment is then passed into the purification device for purification treatment.

[0026] like Figure 2 As shown, the gas generating and mixing device 1 includes a compressed gas tank 10, a filter 11, a gas generator 12, a gas generator 2 13, and a gas mixing tank 14. The compressed gas tank 10 is filled with compressed gas. The air inlet of the filter 11 is connected to the air outlet of the compressed gas tank 10 via a pipeline. The air outlet of the filter 11 is connected to the air inlet of the gas mixing tank 14, the air inlet of the gas generator 12, and the air inlet of the gas generator 2 13 via pipelines. A mass flow controller 17, a needle valve 18, and a one-way valve 19 are installed in sequence along the gas flow direction of the connecting pipelines between the filter 11 and the gas mixing tank 14, gas generator 12, and gas generator 2 13. The air outlets of the gas generator 12 and gas generator 2 13 are both connected to the air inlet of the gas mixing tank 14 via pipelines.

[0027] After being filtered by the filter 11, the compressed gas in the compressed gas tank 10 can be directly passed through the mass flow controller 17, needle valve 18, and one-way valve 19 to the gas mixing tank 14, or it can be passed through the mass flow controller 17, needle valve 18, and one-way valve 19 to the gas generator 12 and gas generator 2 13, and then different types of VOCs gas are generated by gas generator 12 and gas generator 2 13, and then the VOCs gas is passed into the gas mixing tank 14 and evenly mixed with the compressed gas to form simulated exhaust gas. Figure 2As shown, both gas generator 12 and gas generator 2 13 are electrically connected to a temperature controller 15 for controlling the operating temperatures of gas generator 12 and gas generator 2 13. The concentration of one VOC can be precisely controlled through the mass flow controller 17, gas generator 12, and temperature controller 15. The concentration of another VOC can also be precisely controlled through the mass flow controller 17, gas generator 2 13, and temperature controller 15. Ultimately, the precise flow control of the mass flow controller 17 controls the concentration of the VOCs in the gas mixing tank 14 and ensures uniform mixing of the gases.

[0028] Gas mixing tank 14 is externally sleeved with a heating device 16. A temperature sensor and a pressure sensor are located within gas mixing tank 14. The temperature sensor is electrically connected to heating device 16. A safety valve 7 is installed on the first main pipe at the gas outlet of gas mixing tank 14, and the pressure sensor is in communication with safety valve 7. Heating device 16 is used to heat the mixed gas within gas mixing tank 14, thereby simulating the temperature of industrial waste gas and matching it with actual applications. The temperature sensor detects the gas temperature within gas mixing tank 14, allowing heating device 16 to adjust the heating temperature accordingly. The pressure sensor detects the gas pressure within gas mixing tank 14, and in conjunction with safety valve 7, ensures the pressure and safety of gas mixing tank 14.

[0029] like Figure 3 As shown, catalytic combustion apparatus 3 comprises a catalytic combustion column 30, a catalyst support plate 31, and a second heating device 32. The second heating device 32 is sleeved onto the exterior of the catalytic combustion column 30, and the catalyst support plate 31 is fixed within the catalytic combustion column 30. The top air inlet of the catalytic combustion column 30 is connected to the first main pipe via a second branch pipe. A needle valve 33 and a check valve 34 are sequentially mounted on the second branch pipe along the direction of gas flow. A catalyst is provided on the catalyst support plate 31. Simulated exhaust gas enters the catalytic combustion column 30 through needle valve 33 and check valve 34. The catalyst then catalytically combusts the gas during heating by the second heating device 32. Ultimately, the heating temperature can be adjusted by the second heating device 32 to achieve catalytic combustion experiments and treatments at different temperatures.

[0030] like Figure 3As shown, the adsorption device 2 comprises an adsorption column 20, an adsorbent support plate 21, and a third heating device 22. The third heating device 22 is sleeved onto the exterior of the adsorption column 20, and the adsorbent support plate 21 is fixed within the adsorption column 20. The top air inlet of the adsorption column 20 is connected to the first main pipe via a first branch pipe. A second needle valve 23 and a second check valve 24 are positioned on the first branch pipe in the direction of gas flow. Adsorbent is applied to the adsorbent support plate 21. Simulated exhaust gas enters the adsorption column 20 through the second needle valve 23 and the second check valve 24. The adsorbent then absorbs the gas during the heating process of the third heating device 22. Ultimately, the heating temperature can be adjusted by the third heating device 22 to achieve dynamic adsorption experiments and treatments at different temperatures. The bottom outlet of the adsorption column 20 is connected to the second main pipe, and the top air inlet of the catalytic combustion column 30 is connected to the second main pipe through the third branch pipe. A needle valve 4 35 and a one-way valve 4 36 are installed in sequence along the gas flow direction on the third branch pipe. A needle valve 9 8 is installed on the fourth branch pipe. The needle valve 9 (8) is closed to allow the gas after adsorption treatment to pass from the bottom outlet of the adsorption column 20 through the needle valve 4 35 and the one-way valve 4 36 into the catalytic combustion column 30 for further catalytic combustion treatment, thereby conducting an adsorption-catalysis combined experiment. In addition, after the adsorption experiment, the compressed gas in the compressed gas tank 10 can be directly passed into the adsorption column 20 through the gas mixing tank 14, and then the adsorbent on the adsorbent support plate 21 can be regenerated by the compressed gas, and an adsorbent in-situ regeneration experiment can be conducted.

[0031] like Figure 3 As shown, ozone generator 4 includes an oxygen cylinder 40 and an ozone generator 41. The outlet of oxygen cylinder 40 is connected to the inlet of ozone generator 41 via a pipeline. The outlet of ozone generator 41 is connected to the top inlet of catalytic combustion column 30 via a fifth main pipe. Needle valve 5 42 and check valve 5 43 are installed on the fifth main pipe in sequence. Ozone is generated from oxygen in oxygen cylinder 40 by ozone generator 41. Simultaneously, ozone is introduced into catalytic combustion column 30 via needle valve 5 42 and check valve 5 43, allowing the simulated exhaust gas to mix with ozone. The gas is then catalytically combusted by the catalyst during heating in heating device 2 32, allowing for an ozone catalytic combustion experiment. The adsorbed gas is then mixed with ozone and introduced into catalytic combustion column 30. The gas is then catalytically combusted by the catalyst during heating in heating device 2 32, allowing for an adsorption-ozone catalytic combined experiment.

[0032] like Figure 3 As shown, the third main pipe is equipped with a needle valve 6 37. The gas inlet of the gas chromatograph 5 is connected to the fourth main pipe via a fifth branch pipe, which is equipped with a needle valve 7 51. Gas after dynamic adsorption can be passed through needle valve 9 8 and needle valve 7 51 to the gas chromatograph 5 for concentration testing; gas after catalytic combustion can also be passed through needle valve 6 37 and needle valve 7 51 to the gas chromatograph 5 for concentration testing.

[0033] like Figure 3 As shown, gas purification device 6 includes an ethanol absorption tank 61 and an activated carbon absorption tank 62. The gas outlet of ethanol absorption tank 61 is connected to the gas inlet of activated carbon absorption tank 62 via a pipeline. The gas inlet of ethanol absorption tank 61 is connected to the fourth main pipe via a sixth branch pipe, which is equipped with a needle valve 8 63. Gas after dynamic adsorption can be passed through needle valve 9 8 and needle valve 8 63 to ethanol absorption tank 61 for primary absorption and purification. Gas after catalytic combustion can be passed through needle valve 6 37 and needle valve 8 63 to ethanol absorption tank 61 for primary absorption and purification. The gas after primary absorption and purification can then be passed into activated carbon absorption tank 62 for secondary absorption and purification before being discharged.

[0034] The experimental types and specific experimental operations that can be performed by the multifunctional VOCs adsorption catalytic regeneration system of this utility model are as follows:

[0035] A dynamic adsorption experiment of VOCs gas: open the mass flow controller 17, needle valve 18, and one-way valve 19 between the filter 11 and the gas mixing tank 14 and between the filter 11 and the gas generator 12, close the needle valve 18 between the filter 11 and the gas generator 2 13, close the needle valve 3 33 and the needle valve 4 35, and pass the compressed gas and the VOCs gas generated by the gas generator 12 into the gas mixing tank 14 for mixing. The mixed simulated exhaust gas is then passed into the adsorption column 20 through the needle valve 2 23 and the one-way valve 2 24. The simulated exhaust gas is adsorbed by the adsorbent during the heating process of the heating device 3 22 and is then discharged. It can then be passed into the gas chromatograph 5 through the needle valve 9 8 and the needle valve 7 51 for concentration testing, or passed into the ethanol absorption liquid tank 61 and the activated carbon absorption tank 62 through the needle valve 9 8 and the needle valve 8 63 for purification and then discharged.

[0036] Dynamic adsorption experiment of various VOCs gases: open the mass flow controller 17, needle valve 18, and one-way valve 19 between the filter 11 and the gas mixing tank 14, between the filter 11 and the gas generator 12, and between the filter 11 and the gas generator 2 13, close the needle valve 3 33 and the needle valve 4 35, and pass the compressed gas and the VOCs gas generated by the gas generator 12 and the gas generator 2 into the gas mixing tank 14 for mixing. The mixed simulated exhaust gas is then passed into the adsorption column 20 through the one-way valve 23 and the one-way valve 2 24. The simulated exhaust gas is adsorbed by the adsorbent during the heating process of the heating device 3 22 and is then discharged. It can then be passed into the gas chromatograph 5 through the needle valve 9 8 and the needle valve 7 51 for concentration testing, or passed into the ethanol absorption liquid tank 61 and the activated carbon absorption tank 62 through the needle valve 9 8 and the needle valve 8 63 for purification and then discharged.

[0037] A catalytic combustion experiment of VOCs gas: open the mass flow controller 17, needle valve 18, and one-way valve 19 between the filter 11 and the gas mixing tank 14 and between the filter 11 and the gas generator 12, close the needle valve 18 between the filter 11 and the gas generator 2 13, close the needle valve 2 23, and pass the compressed gas and the VOCs gas generated by the gas generator 12 into the gas mixing tank 14 for mixing. The mixed simulated exhaust gas is then passed into the catalytic combustion column 30 through the needle valve 3 33 and the one-way valve 3 34. The simulated exhaust gas is catalytically burned by the catalyst during the heating process of the heating device 2 32 and is then discharged. Then, it can be passed into the gas chromatograph 5 through the needle valve 6 37 and the needle valve 7 51 for concentration testing, or passed into the ethanol absorption liquid tank 61 and the activated carbon absorption tank 62 through the needle valve 6 37 and the needle valve 8 63 for purification treatment before discharge.

[0038] Catalytic combustion experiment of various VOCs gases: open the mass flow controller 17, needle valve 18, and one-way valve 19 between the filter 11 and the gas mixing tank 14, between the filter 11 and the gas generator 12, and between the filter 11 and the gas generator 2 13, close the needle valve 2 23, and pass the compressed gas and the VOCs gas generated by the gas generator 12 and the gas generator 2 13 into the gas mixing tank 14 for mixing. The mixed simulated exhaust gas is then passed into the catalytic combustion column 30 through the needle valve 3 33 and the one-way valve 3 34. The simulated exhaust gas is catalytically burned by the catalyst during the heating process of the heating device 2 32 and is discharged. Then, it can be passed into the gas chromatograph 5 through the needle valve 6 37 and the needle valve 7 51 for concentration testing, or passed into the ethanol absorption liquid tank 61 and the activated carbon absorption tank 62 through the needle valve 6 37 and the needle valve 8 63 for purification treatment and then discharged.

[0039] An ozone catalytic combustion experiment of VOCs gas: open the mass flow controller 17, needle valve 18, and one-way valve 19 between the filter 11 and the gas mixing tank 14 and between the filter 11 and the gas generator 12, close the needle valve 18 between the filter 11 and the gas generator 2 13, close the needle valve 23, pass the compressed gas and the VOCs gas generated by the gas generator 12 into the gas mixing tank 14 for mixing, pass the oxygen in the oxygen cylinder 40 into the ozone generator 41 to generate ozone, and then The mixed simulated exhaust gas is introduced into the catalytic combustion column 30 through needle valve three 33 and one-way valve three 34. At the same time, ozone is introduced into the catalytic combustion column 30 through needle valve five 42 and one-way valve five 43. The simulated exhaust gas and ozone are discharged after catalytic combustion during the heating process of heating device two 32. Then, they can be introduced into the gas chromatograph 5 through needle valve six 37 and needle valve seven 51 for concentration testing, or introduced into the ethanol absorption liquid tank 61 and the activated carbon absorption tank 62 through needle valve six 37 and needle valve eight 63 for purification treatment before discharge.

[0040] Ozone catalytic combustion experiment of various VOCs gases: open the mass flow controller 17, needle valve 18, one-way valve 19 between the filter 11 and the gas mixing tank 14, between the filter 11 and the gas generator 12, and between the filter 11 and the gas generator 2 13, close the needle valve 2 23, pass the compressed gas and the VOCs gas generated by the gas generator 12 and the gas generator 2 13 into the gas mixing tank 14 for mixing, pass the oxygen in the oxygen cylinder 40 into the ozone generator 41 to generate ozone, and then The mixed simulated exhaust gas is introduced into the catalytic combustion column 30 through needle valve three 33 and one-way valve three 34. At the same time, ozone is introduced into the catalytic combustion column 30 through needle valve five 42 and one-way valve five 43. The simulated exhaust gas and ozone are discharged after catalytic combustion during the heating process of heating device two 32. Then, they can be introduced into the gas chromatograph 5 through needle valve six 37 and needle valve seven 51 for concentration testing, or introduced into the ethanol absorption liquid tank 61 and the activated carbon absorption tank 62 through needle valve six 37 and needle valve eight 63 for purification treatment before discharge.

[0041] An adsorption-catalysis combined experiment of VOCs gas: open the mass flow controller 17, needle valve 18, and one-way valve 19 between the filter 11 and the gas mixing tank 14 and between the filter 11 and the gas generator 12, close the needle valve 18 between the filter 11 and the gas generator 2 13, open the needle valve 4 35, close the needle valve 3 33 and the needle valve 9 8, pass the compressed gas and the VOCs gas generated by the gas generator 12 into the gas mixing tank 14 for mixing, and pass the mixed simulated exhaust gas through the needle valve 2 23. The one-way valve 24 leads to the adsorption column 20. The simulated exhaust gas is adsorbed by the adsorbent during the heating process of the heating device 3 22 and then leads to the catalytic combustion column 30 through the needle valve 4 35 and the one-way valve 4 36. Then, during the heating process of the heating device 2 32, the simulated exhaust gas is catalytically combusted by the catalyst and discharged. The gas after catalytic combustion can be passed through the needle valve 6 37 and the needle valve 7 51 to the gas chromatograph 5 for concentration testing, or passed through the needle valve 6 37 and the needle valve 8 63 to the ethanol absorption liquid tank 61 and the activated carbon absorption tank 62 for purification treatment and then discharged.

[0042] Adsorption-catalytic combination experiment of various VOCs gases: open the mass flow controller 17, needle valve 18, and one-way valve 19 between the filter 11 and the gas mixing tank 14, between the filter 11 and the gas generator 12, and between the filter 11 and the gas generator 2 13, open the needle valve 4 35, close the needle valve 3 33 and the needle valve 9 8, pass the compressed gas and the VOCs gas generated by the gas generator 12 and the gas generator 2 13 into the gas mixing tank 14 for mixing, and pass the mixed simulated exhaust gas through the needle valve 2 23. The one-way valve 24 leads to the adsorption column 20. The simulated exhaust gas is adsorbed by the adsorbent during the heating process of the heating device 3 22 and then leads to the catalytic combustion column 30 through the needle valve 4 35 and the one-way valve 4 36. Then, during the heating process of the heating device 2 32, the simulated exhaust gas is catalytically combusted by the catalyst and discharged. The gas after catalytic combustion can be passed through the needle valve 6 37 and the needle valve 7 51 to the gas chromatograph 5 for concentration testing, or passed through the needle valve 6 37 and the needle valve 8 63 to the ethanol absorption liquid tank 61 and the activated carbon absorption tank 62 for purification treatment and then discharged.

[0043] A VOCs gas adsorption-ozone catalytic combination experiment: open the mass flow controller 17, needle valve 18, and one-way valve 19 between the filter 11 and the gas mixing tank 14 and between the filter 11 and the gas generator 12, close the needle valve 18 between the filter 11 and the gas generator 2 13, open the needle valve 4 35, close the needle valve 3 33 and the needle valve 9 8, pass the compressed gas and the VOCs gas generated by the gas generator 12 into the gas mixing tank 14 for mixing, pass the oxygen in the oxygen cylinder 40 into the ozone generator 41 to generate ozone, and pass the mixed simulated exhaust gas through the needle valve 2 23 and the one-way valve 2 24 is passed into the adsorption column 20, and the simulated exhaust gas is adsorbed by the adsorbent during the heating process of the heating device three 22 and then passed into the catalytic combustion column 30 through the needle valve four 35 and the one-way valve four 36. At the same time, ozone is passed into the catalytic combustion column 30 through the needle valve five 42 and the one-way valve five 43. The adsorbed simulated exhaust gas and ozone are catalytically burned by the catalyst during the heating process of the heating device two 32 and are discharged. The gas after catalytic combustion can be passed into the gas chromatograph 5 through the needle valve six 37 and the needle valve seven 51 for concentration testing, or passed into the ethanol absorption liquid tank 61 and the activated carbon absorption tank 62 through the needle valve six 37 and the needle valve eight 63 for purification and then discharged.

[0044] Experiment on adsorption of multiple VOCs gases and ozone catalysis: open the mass flow controller 17, needle valve 18, and one-way valve 19 between the filter 11 and the gas mixing tank 14, between the filter 11 and the gas generator 12, and between the filter 11 and the gas generator 2 13, open the needle valve 4 35, close the needle valve 3 33 and the needle valve 9 8, pass the compressed gas and the VOCs gas generated by the gas generator 12 and the gas generator 2 13 into the gas mixing tank 14 for mixing, pass the oxygen in the oxygen cylinder 40 into the ozone generator 41 to generate ozone, and pass the mixed simulated exhaust gas through the needle valve 2 23 and the one-way valve 2 24 is passed into the adsorption column 20, and the simulated exhaust gas is adsorbed by the adsorbent during the heating process of the heating device three 22 and then passed into the catalytic combustion column 30 through the needle valve four 35 and the one-way valve four 36. At the same time, ozone is passed into the catalytic combustion column 30 through the needle valve five 42 and the one-way valve five 43. The adsorbed simulated exhaust gas and ozone are catalytically burned by the catalyst during the heating process of the heating device two 32 and are discharged. The gas after catalytic combustion can be passed into the gas chromatograph 5 through the needle valve six 37 and the needle valve seven 51 for concentration testing, or passed into the ethanol absorption liquid tank 61 and the activated carbon absorption tank 62 through the needle valve six 37 and the needle valve eight 63 for purification and then discharged.

[0045] Adsorbent in-situ regeneration experiment: open the mass flow controller 17, needle valve 18, and one-way valve 19 between the filter 11 and the gas mixing tank 14, close the mass flow controller 17, needle valve 18, and one-way valve 19 between the filter 11 and the gas generator 12 and between the filter 11 and the gas generator 2 13, close the needle valve 3 33 and the needle valve 4 35, and pass the compressed gas into the adsorption column 20 through the gas mixing tank 14, the needle valve 2 23, and the one-way valve 2 24. The absorbent is regenerated by the compressed gas, and the waste gas generated can be passed through the needle valve 9 8 and the needle valve 7 51 to the gas chromatograph 5 for concentration testing, or passed through the needle valve 9 8 and the needle valve 8 63 to the ethanol absorption liquid tank 61 and the activated carbon absorption tank 62 for purification treatment and then discharged.

[0046] Based on the above experimental operations, the multifunctional VOCs adsorption catalytic regeneration system of the utility model integrates VOCs dynamic adsorption experiment, catalytic combustion experiment, catalytic ozone combustion experiment, adsorption-catalysis combined experiment, and adsorbent in-situ regeneration experiment. It can be used for experimental teaching and scientific research as well as atmospheric VOCs deep treatment engineering research and design experiments. It has a simple overall structure, small footprint, easy use, low cost, and simple operation.

[0047] Finally, although the above description has shown and described the embodiments of the present invention, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A multifunctional VOCs adsorption catalytic regeneration system, characterized by: The invention comprises a gas generating and mixing device (1), an adsorption device (2), a catalytic combustion device (3), an ozone generating device (4), a gas chromatograph (5), and a gas purification device (6). The gas outlet of the gas generating and mixing device (1) is connected to a first main pipe, the gas inlet of the adsorption device (2) is connected to the first main pipe through a first branch pipe, the gas inlet of the catalytic combustion device (3) is connected to the first main pipe through a second branch pipe, the gas outlet of the adsorption device (2) is connected to a second main pipe, the gas inlet of the catalytic combustion device (3) is connected to the second main pipe through a third branch pipe, the gas outlet of the catalytic combustion device (3) is connected to a fourth main pipe through the third main pipe, the second main pipe is connected to the fourth main pipe through a fourth branch pipe, the gas inlet of the gas chromatograph (5) is connected to the fourth main pipe through a fifth branch pipe, the gas inlet of the gas purification device (6) is connected to the fourth main pipe through a sixth branch pipe, and the gas outlet of the ozone generating device (4) is connected to the gas inlet of the catalytic combustion device (3) through the fifth main pipe.

2. The multifunctional VOCs adsorption catalytic regeneration system according to claim 1, characterized in that: The gas generating and mixing device (1) comprises a compressed gas tank (10), a filter (11), a gas generator 1 (12), a gas generator 2 (13), and a gas mixing tank (14). The air inlet of the filter (11) is connected to the air outlet of the compressed gas tank (10) through a pipeline. The air outlet of the filter (11) is connected to the air inlet of the gas mixing tank (14), the air inlet of the gas generator 1 (12), and the air inlet of the gas generator 2 (13) through a pipeline. The air outlet of the gas generator 1 (12) and the air outlet of the gas generator 2 (13) are connected to the air inlet of the gas mixing tank (14) through a pipeline. The air outlet of the gas mixing tank (14) is connected to a first main pipe. The gas generator 1 (12) and the gas generator 2 (13) are both electrically connected to a temperature controller (15). The gas mixing tank (14) is externally sleeved with a heating device 1 (16).

3. The multifunctional VOCs adsorption catalytic regeneration system according to claim 2, characterized in that: A mass flow controller (17), a needle valve (18), and a one-way valve (19) are sequentially provided along the gas flow direction on the connecting pipelines between the filter (11) and the gas mixing tank (14), the first gas generator (12), and the second gas generator (13).

4. The multifunctional VOCs adsorption catalytic regeneration system according to claim 2, characterized in that: A temperature sensor and a pressure sensor are provided in the gas mixing tank (14). The temperature sensor is electrically connected to the first heating device (16). A safety valve (7) is provided on the first main pipe at the gas outlet of the gas mixing tank (14). The pressure sensor is connected to the safety valve (7).

5. The multifunctional VOCs adsorption catalytic regeneration system according to claim 2, characterized in that: The catalytic combustion device (3) comprises a catalytic combustion column (30), a catalyst support plate (31), and a second heating device (32). The catalytic combustion column (30) is sleeved with the second heating device (32). The catalytic combustion column (30) is provided with a catalyst support plate (31) inside the catalytic combustion column (30). The top air inlet of the catalytic combustion column (30) is connected to the first main pipe through a second branch pipe. A needle valve (33) and a one-way valve (34) are sequentially provided on the second branch pipe along the gas flow direction. The bottom air outlet of the catalytic combustion column (30) is connected to the fourth main pipe through a third main pipe. The third main pipe is provided with a sixth needle valve (37).

6. The multifunctional VOCs adsorption catalytic regeneration system according to claim 5, characterized in that: The adsorption device (2) comprises an adsorption column (20), an adsorbent support plate (21), and a third heating device (22). The outer portion of the adsorption column (20) is sleeved with the third heating device (22). The adsorption column (20) is provided with an adsorbent support plate (21). The top air inlet of the adsorption column (20) is connected to the first main pipe through a first branch pipe. A second needle valve (23) and a second one-way valve (24) are sequentially provided on the first branch pipe along the direction of gas flow. The bottom air outlet of the adsorption column (20) is connected to the second main pipe. The top air inlet of the catalytic combustion column (30) is connected to the second main pipe through a third branch pipe. A fourth needle valve (35) and a fourth one-way valve (36) are sequentially provided on the third branch pipe along the direction of gas flow. A ninth needle valve (8) is provided on the fourth branch pipe.

7. The multifunctional VOCs adsorption catalytic regeneration system according to claim 5, characterized in that: The ozone generating device (4) comprises an oxygen cylinder (40) and an ozone generator (41). The gas outlet of the oxygen cylinder (40) is connected to the gas inlet of the ozone generator (41) through a pipeline. The gas outlet of the ozone generator (41) is connected to the top gas inlet of the catalytic combustion column (30) through a fifth main pipe. A needle valve (42) and a one-way valve (43) are sequentially provided on the fifth main pipe along the gas flow direction.

8. The multifunctional VOCs adsorption catalytic regeneration system according to claim 5, characterized in that: The gas inlet of the gas chromatograph (5) is connected to the fourth main pipe through the fifth branch pipe, and the fifth branch pipe is provided with a needle valve seven (51).

9. The multifunctional VOCs adsorption catalytic regeneration system according to claim 5, characterized in that: The gas purification device (6) comprises an ethanol absorption liquid tank (61) and an activated carbon absorption tank (62). The gas outlet of the ethanol absorption liquid tank (61) is connected to the gas inlet of the activated carbon absorption tank (62) through a pipeline. The gas inlet of the ethanol absorption liquid tank (61) is connected to the fourth main pipe through a sixth branch pipe. The sixth branch pipe is provided with a needle valve 8 (63).

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