A device for testing the efficiency of regenerated activated carbon

Abstract

This utility model discloses a device for testing the effectiveness of regenerated activated carbon, comprising: a solvent mixing mechanism, a VOC gas preparation mechanism, and a gas mixing mechanism, which work together to form a gas generation system. The gas generation system is used to prepare VOC gas of a preset concentration. The gas mixing mechanism is connected to an adsorption mechanism via a pipeline. The adsorption mechanism includes an adsorption reactor filled with regenerated activated carbon. The inlet and outlet of the adsorption reactor are both connected via pipelines and equipped with VOC gas concentration detectors. This device, after filling the adsorption mechanism with regenerated activated carbon, prepares VOC gas of a preset concentration according to the desired VOC gas concentration through the gas generation system. Two VOC concentration detectors then monitor the VOC gas concentration before and after purification in real time. The adsorption performance of the regenerated activated carbon for VOC gas can be directly judged based on the time and concentration of VOC gas introduced into the adsorption mechanism.

Description

Technical Field

[0001] This utility model relates to the field of activated carbon regeneration technology, and in particular to a device for testing the efficiency of regenerated activated carbon. Background Technology

[0002] Activated carbon is an excellent adsorbent material with a well-developed pore structure and a large specific surface area, and it has a wide range of important applications in various industries, especially in the treatment of VOC gases. The regeneration and resource utilization of spent activated carbon is also a current focus of environmental engineering. For regenerated activated carbon, conventional performance testing methods generally include iodine adsorption value, methylene blue adsorption value, and carbon tetrachloride adsorption rate.

[0003] These adsorption methods are usually static adsorption, while the adsorption process of VOC gases usually involves dynamic changes (such as changes in gas concentration). Therefore, conventional testing methods cannot intuitively reflect the adsorption effect of activated carbon in dynamic airflow, making it difficult to judge the adsorption performance and quality of regenerated activated carbon for VOC gases. Utility Model Content

[0004] This invention provides a device for testing the performance of regenerated activated carbon, which can solve the problem that conventional testing methods mentioned in the background art are difficult to intuitively determine its adsorption performance and quality for VOC gases.

[0005] A device for testing the efficiency of regenerated activated carbon includes: a solvent mixing mechanism, which is connected to a VOC gas preparation mechanism via a pipeline; the VOC gas preparation mechanism is connected to a gas mixing mechanism via a pipeline; the solvent mixing mechanism, the VOC gas preparation mechanism, and the gas mixing mechanism cooperate to form a gas generating system; the gas generating system is used to prepare VOC gas of a preset concentration.

[0006] The gas mixing mechanism is connected to an adsorption mechanism via a pipeline. The adsorption mechanism includes an adsorption reaction vessel, which is filled with regenerated activated carbon.

[0007] The inlet and outlet of the adsorption reactor are both connected by pipes and equipped with VOC gas concentration detectors.

[0008] Preferably, the solvent mixing mechanism includes a stirring tank with three liquid inlets, each connected to a storage tank.

[0009] Preferably, the VOC gas preparation mechanism includes a liquid evaporator, the outer wall of which is provided with a jacketed cavity, the jacketed cavity is connected to a constant temperature heater through a pipe, and the constant temperature heater and the jacketed cavity cooperate through a pipe to form a liquid circulation loop.

[0010] Preferably, the liquid evaporator is further provided with a first pressure gauge and a first pressure relief valve.

[0011] Preferably, the gas mixing mechanism includes a gas mixer, the air inlet of which is connected to an air compressor pump via a pipe.

[0012] Preferably, the gas mixer is further provided with a second pressure gauge and a second pressure relief valve.

[0013] Preferably, a gas distributor is provided inside the adsorption reactor, and multiple filling boxes are provided on one side of the gas distributor. One end of two adjacent filling boxes is connected to a partition, so that a gas flow channel is formed between the two adjacent filling boxes. The partitions are staggered so that the opening directions of two adjacent gas flow channels are opposite.

[0014] Preferably, the partition plate is also connected between one end of the filling box near the inner wall of the adsorption reactor and the inner wall.

[0015] Preferably, the outlet of the adsorption reactor is connected to an induced draft fan via a pipe.

[0016] Preferably, the exhaust port of the induced draft fan is connected to an exhaust gas processor via a pipe.

[0017] The beneficial effects of this utility model are:

[0018] This regenerated activated carbon performance testing device involves loading regenerated activated carbon into the adsorption mechanism. Based on the required VOC gas concentration, the solvent ratio is adjusted via a solvent mixing mechanism. Then, a VOC gas of a preset concentration is prepared via a VOC gas preparation mechanism and a gas mixing mechanism. The VOC gas enters the adsorption mechanism stably and smoothly for purification. Two VOC concentration detectors monitor the VOC gas concentration before and after purification in real time. The adsorption performance of the regenerated activated carbon can be directly judged based on the time and concentration of VOC gas entering the adsorption mechanism. Furthermore, the saturated adsorption capacity of the regenerated activated carbon can be determined, facilitating the evaluation of its quality. Attached Figure Description

[0019] Figure 1 A schematic diagram of the structure of a regenerated activated carbon efficiency testing device provided by this utility model;

[0020] Figure 2 for Figure 1 Schematic diagram of the internal structure of a liquid evaporator;

[0021] Figure 3 for Figure 1 Schematic diagram of the internal structure of a gas mixer;

[0022] Figure 4 for Figure 1 A schematic diagram of the internal structure of the adsorption reactor.

[0023] Explanation of reference numerals in the attached figures:

[0024] 1. Solvent mixing mechanism; 11. Stirring tank; 12. First storage tank; 13. Second storage tank; 14. Third storage tank; 2. VOC gas preparation mechanism; 21. Liquid evaporator; 211. Jacketed cavity; 212. Heat medium inlet; 213. Heat medium outlet; 214. First pressure gauge; 215. First pressure relief valve; 22. Constant temperature heater; 3. Gas mixing mechanism; 31. Gas mixer; 311. Second pressure relief valve; 312. Second pressure gauge; 32. Air compressor pump; 4. Adsorption mechanism; 41. Adsorption reaction vessel; 411. Gas distributor; 412. Filling box; 42. Exhaust fan; 43. Waste gas processor; 5. VOC gas concentration detector. Detailed Implementation

[0025] The specific embodiments of this utility model are described in detail below, but it should be understood that the protection scope of this utility model is not limited to the specific embodiments.

[0026] like Figure 1 As shown, this utility model proposes a device for testing the efficiency of regenerated activated carbon, comprising: a solvent mixing mechanism 1, which includes a stirring tank 11, a stirring paddle installed inside the stirring tank 11, and a motor driving the stirring paddle to rotate, thereby achieving solvent mixing. The stirring tank 11 has three liquid inlets, which are respectively connected to storage tanks via pipes, and control valves are installed on the pipes. The three storage tanks are designated as a first storage tank 12, a second storage tank 13, and a third storage tank 14. The solvent in the first storage tank 12 is a toluene solution, the solvent in the second storage tank 13 is a xylene solution, and the solution in the third storage tank 14 is a formaldehyde solution.

[0027] The solvent mixing mechanism 1 is connected to the VOC gas preparation mechanism 2 via a pipe. The VOC gas preparation mechanism 2 includes a liquid evaporator 21.

[0028] Among them, such as Figure 2 As shown, the outer wall of the liquid evaporator 21 is a double-layered wall, which divides the inner cavity of the liquid evaporator 21 into two chambers, namely the evaporation chamber and the jacketed chamber 211. The jacketed chamber 211 is located outside the evaporation chamber, and the jacketed chamber 211 is connected to a thermostatic heater 22 through a pipe.

[0029] Specifically, the liquid evaporator 21 is equipped with a heat medium inlet 212 and a heat medium outlet 213. A pipe is installed between the heat medium inlet 212 and the liquid outlet of the constant temperature heater 22, and a pipe is installed between the heat medium outlet 213 and the liquid inlet of the constant temperature heater 22. Control valves are installed on both pipes. The constant temperature heater 22 and the jacketed cavity 211 form a liquid circulation loop through the two pipes, allowing the heat medium to circulate within the liquid loop. In this embodiment, silicone oil is used as the heat medium. The liquid evaporator 21 is also equipped with a first pressure gauge 214 and a first pressure relief valve 215. The first pressure gauge 214 monitors the gas pressure inside the evaporation chamber. If the gas pressure exceeds a safe value, the first pressure relief valve 215 releases pressure to ensure the safety of the liquid evaporator 21.

[0030] The liquid evaporator 21 is also provided with a liquid inlet and a gas outlet, both of which are connected to the evaporation chamber. The liquid inlet of the liquid evaporator 21 is connected to the liquid outlet of the stirring tank 11 through a pipe.

[0031] like Figure 1 , Figure 3 As shown, the VOC gas preparation unit 2 is connected to the gas mixing unit 3 via a pipeline. The gas mixing unit 3 includes a gas mixer 31, which has two inlets and one outlet. One inlet of the gas mixer 31 is connected to the outlet of the liquid evaporator 21 via a pipeline, and the other inlet of the gas mixer 31 is connected to an air compressor pump 32 via a pipeline. Both pipelines are equipped with control valves and flow meters to facilitate adjustment and observation of the gas flow rate entering the gas mixer 31. The gas mixer 31 is also equipped with a second pressure gauge 312 and a second pressure relief valve 311, which work together to improve the safety of the gas mixer 31.

[0032] In this embodiment, the solvent mixing mechanism 1, the VOC gas preparation mechanism 2, and the gas mixing mechanism 3 cooperate to form a gas generating system, which is used to prepare VOC gas of a preset concentration.

[0033] Specifically, a VOC gas of a predetermined concentration is prepared. Based on this predetermined concentration, the solvent mixing mechanism 1 adjusts the solvent ratio, causing toluene solution, xylene solution, and formaldehyde solution to flow from the first storage tank 12, the second storage tank 13, and the third storage tank 14, respectively, into the mixing tank 11 for mixing. The amounts of toluene solution, xylene solution, and formaldehyde solution are controlled by valves, or flow meters can be installed on the pipelines to monitor the solvent volume. After being mixed, the toluene solution, xylene solution, and formaldehyde solution are introduced into the liquid evaporator 21 of the VOC gas preparation structure 2 for vaporization. During vaporization, silicone oil is heated by a constant-temperature heater 22. The silicone oil flowing into the jacketed cavity 211 heats the solvent in the evaporation chamber, causing the solvent to evaporate into gas. The evaporated solvent gas enters the gas mixer 31 of the gas mixing mechanism 3. An air compressor pump 32 delivers compressed air to the gas mixer 31. After the compressed air mixes with the solvent gas, VOC gas of the predetermined concentration is generated.

[0034] like Figure 1 As shown, the gas mixing mechanism 3 is connected to the adsorption mechanism 4 via a pipeline. The adsorption mechanism 4 includes an adsorption reactor 41, which is filled with regenerated activated carbon. One end of the adsorption reactor 41 has an inlet, and the other end has an outlet. The inlet of the adsorption reactor 41 is connected to the outlet of the gas mixer 31 via a pipeline, and the outlet of the adsorption reactor 41 is connected to an induced draft fan 42 via a pipeline. Both pipelines are equipped with flow meters and three-way valves. A VOC gas concentration detector 5 is connected to the three-way valve via a pipeline, so that both the inlet and outlet of the adsorption reactor 41 are connected to a VOC gas concentration detector 5. The two VOC gas concentration detectors 5 detect the VOC gas concentration before and after purification, respectively. The outlet of the induced draft fan 42 is connected to a waste gas processor 43 via a pipeline for treating the purified VOC gas waste gas.

[0035] Furthermore, such as Figure 4 As shown, a gas distributor 411 is installed inside the adsorption reactor 41, and multiple filling boxes 412 are arranged on one side of the gas distributor 411. A partition is connected to one end of two adjacent filling boxes 412, forming a gas flow channel between them. The partitions are staggered, so that the opening directions of adjacent gas flow channels are opposite. Additionally, a partition is also connected between one end of the filling box 412 closest to the inner wall of the adsorption reactor 41 and the inner wall.

[0036] The walls of the filling box 412 are mesh-like, and the interior is filled with a number of regenerated activated carbons. The regenerated activated carbons can adsorb VOCs and achieve gas purification.

[0037] In this embodiment, as Figure 1 , Figure 4As shown, VOC gas is split into two streams at the three-way valve near the inlet of the adsorption reactor 41. One stream enters the VOC gas concentration detector 5 to detect the VOC gas concentration before purification, i.e., the VOC gas concentration at the inlet of the adsorption reactor 41. The other stream enters the adsorption reactor 41 steadily and smoothly. After being evenly distributed by the gas distributor 41, the VOC gas in the adsorption reactor 41 shuttles through the filling box 412 and the gas flow channel. During the shuttle process, the regenerated activated carbon adsorbs the VOCs, and the purified gas flows out from the outlet of the adsorption reactor 41. The outflowing gas is split into two streams: one stream enters the VOC gas concentration detector 5 to detect the purified VOC gas concentration, and the other stream enters the exhaust gas processor 43 through the induced draft fan 42 for treatment before being discharged to the outside. Two VOC concentration detectors 5 monitor the VOC gas concentration at the inlet and outlet of the adsorption reactor 41 in real time. Based on the time and concentration of VOC gas entering the adsorption reactor 41, the adsorption performance of the regenerated activated carbon for VOC gas can be directly judged, and the saturated adsorption capacity of the regenerated activated carbon can also be further judged, which is convenient for evaluating the quality of the regenerated activated carbon.

[0038] This regenerated activated carbon performance testing device can also detect the adsorption performance of new activated carbon and calculate the replacement cycle of new activated carbon by simulating the VOC composition and concentration, gas flow rate, and filling amount of the filling box 412 of the actual adsorption device.

[0039] It is understood that the gas generation system in this application uses a simulated VOC gas and air mixture to simulate a dynamic flow environment, which can more accurately evaluate the adsorption performance of regenerated activated carbon on VOC gas and facilitate the verification of the quality of regenerated activated carbon.

[0040] Working principle: After the regenerated activated carbon is filled into the adsorption unit 4, the solvent ratio is adjusted by the solvent mixing unit 1 according to the required VOC gas concentration. The VOC gas of the preset concentration is prepared by the VOC gas preparation unit 2 and the gas mixing unit 3. The VOC gas flow rate is controlled by the flow control valve so that the VOC gas enters the adsorption unit 4 stably and smoothly for purification. Then, the VOC gas concentration before and after purification is monitored in real time by two VOC concentration detectors 5.

[0041] The above-disclosed embodiments are only a few specific examples of the present utility model. However, the embodiments of the present utility model are not limited thereto. Any changes that can be conceived by those skilled in the art should fall within the protection scope of the present utility model.

Claims

1. A device for testing the performance of a regenerated activated carbon, characterized by, include: A solvent mixing mechanism (1) is connected to a VOC gas preparation mechanism (2) via a pipe. The VOC gas preparation mechanism (2) is connected to a gas mixing mechanism (3) via a pipe. The solvent mixing mechanism (1), the VOC gas preparation mechanism (2), and the gas mixing mechanism (3) cooperate to form a gas generating system. The gas generating system is used to prepare VOC gas of a preset concentration. The gas mixing mechanism (3) is connected to the adsorption mechanism (4) via a pipeline. The adsorption mechanism (4) includes an adsorption reaction vessel (41) filled with regenerated activated carbon. The inlet and outlet of the adsorption reactor (41) are both connected by pipes and equipped with VOC gas concentration detectors (5).

2. The device for testing the efficiency of regenerated activated carbon as described in claim 1, characterized in that, The solvent mixing mechanism (1) includes a stirring tank (11), which is provided with three liquid inlets and is connected to storage tanks respectively.

3. The device for testing the efficiency of regenerated activated carbon as described in claim 2, characterized in that, The VOC gas preparation mechanism (2) includes a liquid evaporator (21), and the outer wall of the liquid evaporator (21) is provided with a jacketed cavity (211). The jacketed cavity (211) is connected to a constant temperature heater (22) through a pipe. The constant temperature heater (22) and the jacketed cavity (211) cooperate through a pipe to form a liquid circulation loop.

4. The device for testing the efficiency of regenerated activated carbon as described in claim 3, characterized in that, The liquid evaporator (21) is also equipped with a first pressure gauge (214) and a first pressure relief valve (215).

5. The device for testing the efficiency of regenerated activated carbon as described in claim 1, characterized in that, The gas mixing mechanism (3) includes a gas mixer (31), the air inlet of which is connected to an air compressor pump (32) via a pipe.

6. The device for testing the efficiency of regenerated activated carbon as described in claim 5, characterized in that, The gas mixer (31) is also equipped with a second pressure gauge (312) and a second pressure relief valve (311).

7. The device for testing the efficiency of regenerated activated carbon as described in claim 1, characterized in that, The adsorption reactor (41) is equipped with a gas distributor (411). Multiple filling boxes (412) are provided on one side of the gas distributor (411). A partition is connected to one end of two adjacent filling boxes (412) to form a gas flow channel between the two adjacent filling boxes (412). The partitions are staggered so that the opening directions of the two adjacent gas flow channels are opposite.

8. The device for testing the efficiency of regenerated activated carbon as described in claim 7, characterized in that, The partition plate is also connected between one end of the filling box (412) near the inner wall of the adsorption reactor (41) and the inner wall.

9. The device for testing the efficiency of regenerated activated carbon as described in claim 1, characterized in that, The outlet of the adsorption reactor (41) is connected to an induced draft fan (42) via a pipe.

10. The device for testing the efficiency of regenerated activated carbon as described in claim 9, characterized in that, The exhaust port of the induced draft fan (42) is connected to the exhaust gas processor (43) via a pipe.

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