Environment-friendly gas purification system

Abstract

The utility model discloses an environment-friendly gas purification system and relates to the technical field of waste gas treatment. Comprising a plurality of activated carbon adsorption boxes, activated carbon adsorption beds are arranged in the activated carbon adsorption boxes, an adsorption gas inlet, an adsorption gas outlet, a desorption gas inlet and a desorption gas outlet are formed in a box body of each activated carbon adsorption box, a dry type filter box is arranged on the outer side of each activated carbon adsorption box, and a waste gas input header pipe is fixed to the output end of each dry type filter box. The activated carbon adsorption device is provided with the activated carbon adsorption box, the electric control valve and the airflow detection assembly, the airflow detection assembly is used for detecting the flow rate of gas exhausted from the adsorption exhaust port so as to judge the saturation state of the activated carbon adsorption box, and when the flow rate of the gas is lower than a set value, the controller controls the electric control valve of the adsorption air inlet to be closed; and then an electric control valve on the activated carbon adsorption box in the standby state is controlled to be opened, so that the activated carbon adsorption bed in the saturated state can be conveniently desorbed without influencing the normal work of the system.

Description

Technical Field

[0001] The utility model relates to the technical field of waste gas treatment, in particular to an environmentally friendly air purification system. Background Art

[0002] The Chinese utility model patent, authorization announcement number CN 220142973 U, discloses a waste gas purification device for a footwear production line, including a gas collecting duct, a purification mechanism, a plurality of branch pipes, a catalytic bed burner and an activated carbon adsorption box, each of which is provided with an adsorption air inlet, an adsorption exhaust port, a desorption air inlet and a desorption exhaust port, and the adsorption exhaust port of each activated carbon adsorption box is connected to an exhaust air duct and discharged by an induced draft fan arranged on the exhaust air duct. The utility model solves the problem that the waste gas in the existing footwear production workshop cannot be effectively and quickly treated.

[0003] The above scheme solves the technical problems raised in its background technology, but in practical applications, the above scheme still has certain defects. For example, when the activated carbon adsorption bed in the activated carbon adsorption box is desorbed from the waste gas, the adsorption air inlet is still in an open state, and the waste gas still enters the activated carbon adsorption box through the adsorption air inlet, so that there are two upper and lower airflows in the activated carbon adsorption box. This will firstly reduce the temperature of the desorbed gas, thereby reducing the waste gas desorption effect, and secondly slow down the outflow speed of the waste gas after desorption, thereby reducing the desorption efficiency. Utility Model Content

[0004] The purpose of the utility model is to provide an environmentally friendly air purification system to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an environmentally friendly air purification system, comprising a plurality of activated carbon adsorption boxes, wherein an activated carbon adsorption bed is arranged in the activated carbon adsorption box, an adsorption air inlet, an adsorption air outlet, a desorption air inlet and a desorption air outlet are arranged on the box body of the activated carbon adsorption box, a dry filter box is arranged on the outside of the activated carbon adsorption box, an exhaust gas input main pipe is fixedly arranged at the output end of the dry filter box, an exhaust gas input branch pipe is fixedly connected between the exhaust gas input main pipe and the activated carbon adsorption box, and an electric control valve is connected to the pipe body of the exhaust gas input branch pipe;

[0006] The pipe body of the desorption exhaust port is connected to the desorption gas exhaust pipe through the connecting pipe 1, the outlet of the desorption gas exhaust pipe is connected to the catalytic bed burner, the outlet of the catalytic bed burner is connected to the high-temperature gas inlet pipe, the pipe body of the high-temperature gas inlet pipe is connected to the adsorption fan, and the pipe body of the high-temperature gas inlet pipe is connected to the desorption air inlet through the connecting pipe 2;

[0007] The outlet of the adsorption exhaust port is connected to a clean gas exhaust pipe through a connecting pipe 3, and the outlet of the clean gas exhaust pipe is connected to an induced draft fan and a chimney;

[0008] The pipe body of the connecting pipe three is connected with an airflow detection component.

[0009] Preferably, the adsorption air inlet, the adsorption air outlet, the desorption air inlet and the desorption air outlet are all connected to the pipe openings with stop valves.

[0010] Preferably, a flame arrester is connected to the pipe body of the desorbed gas exhaust pipe.

[0011] Preferably, a cooling fan is connected to the pipe body of the high-temperature gas inlet pipe.

[0012] Preferably, a combustible gas storage tank is connected to the side of the catalytic bed burner.

[0013] Preferably, an exhaust pipe is connected to the side of the catalytic bed burner, and the exhaust pipe is fixedly connected to the clean gas exhaust pipe.

[0014] Compared with the prior art, the beneficial effects of the utility model are:

[0015] The environmentally friendly air purification system is provided with an activated carbon adsorption box, an electric control valve and an airflow detection component. The gas flow rate discharged from the adsorption exhaust port is detected by the airflow detection component to determine the saturation state of the activated carbon adsorption box. When the gas flow rate is lower than the set value, the electric control valve of the adsorption air inlet is controlled to be closed by a controller, and then the electric control valve on the activated carbon adsorption box in the standby state is controlled to be opened, so that the activated carbon adsorption bed in the saturated state can be desorbed without affecting the normal operation of the system, thereby improving the desorption efficiency and desorption effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0017] In the figure: 1. Dry filter box; 101. Waste gas input main pipe; 2. Activated carbon adsorption box; 201. Adsorption air inlet; 202. Adsorption exhaust port; 203. Desorption air inlet; 204. Desorption exhaust port; 3. Air flow detection component; 301. Clean gas exhaust pipe; 4. Flame arrester; 401. Desorption gas exhaust pipe; 5. Catalytic bed burner; 501. High-temperature gas inlet pipe; 6. Adsorption fan; 7. Supplementary cooling fan; 8. Induced draft fan; 9. Combustible gas storage tank; 10. Chimney; 11. Electric control valve. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0019] like Figure 1 As shown, the utility model provides a technical solution: an environmentally friendly air purification system, comprising a plurality of activated carbon adsorption boxes 2, the number of which depends on the production scale. In this solution, five activated carbon adsorption boxes 2 are provided, and an activated carbon adsorption bed for adsorbing exhaust gas is provided in the activated carbon adsorption box 2. An adsorption air inlet 201, an adsorption exhaust port 202, a desorption air inlet 203 and a desorption exhaust port 204 are provided on the box body of the activated carbon adsorption box 2. The air inlet 203 and the desorption exhaust port 204 are both connected to stop valves, and a dry filter box 1 for adsorbing water vapor on the exhaust gas is arranged on the outside of the activated carbon adsorption box 2 to prevent the water vapor in the exhaust gas from being adsorbed by the activated carbon adsorption bed and shortening the service life of the activated carbon adsorption box 2. An exhaust gas input main pipe 101 is fixed at the output end of the dry filter box 1, and an exhaust gas input branch pipe is fixedly connected between the exhaust gas input main pipe 101 and the activated carbon adsorption box 2. In addition, an electric control valve 11 is connected to the pipe body of the exhaust gas input branch pipe.

[0020] It should be noted that, in the present embodiment, when working, not all the electrically-controlled valves 11 are in the fully-open state. For example, in the present embodiment, the number of activated carbon adsorption boxes 2 is five. When working, three of the electrically-controlled valves 11 can be selected to be in the open state, and the other two can be selected to be in the closed state. In this way, the two activated carbon adsorption boxes 2 in the closed state are in the standby state. When one or more of the activated carbon adsorption boxes 2 in the working state are saturated, the controller controls the electrically-controlled valve 11 of the adsorption air inlet 201 to be closed, and then controls the electrically-controlled valve on the activated carbon adsorption box 2 in the standby state to be opened, thereby facilitating the desorption of the activated carbon adsorption bed in the saturated state, thereby improving the desorption efficiency.

[0021] The pipe body of the desorption exhaust port 204 is connected to the desorption gas exhaust pipe 401 through a connecting pipe 1, a flame arrester 4 is connected to the pipe body of the desorption gas exhaust pipe 401, the outlet of the desorption gas exhaust pipe 401 is connected to a catalytic bed burner 5, and a combustible gas storage tank 9 is connected to the side of the catalytic bed burner 5. The combustible gas storage tank 9 can store liquid or high-pressure carbon monoxide. First, the combustible gas burns and heats the desorption gas in the desorption gas exhaust pipe 401, thereby converting the desorption gas into harmless gas for discharge. Secondly, the desorption gas is generated. The heat can heat the external gas, thereby converting it into high-temperature gas for desorption (hereinafter referred to as desorption gas). Specifically, the outlet of the catalytic bed burner 5 is connected to the high-temperature gas inlet pipe 501, and the pipe body of the high-temperature gas inlet pipe 501 is connected to the adsorption fan 6. The pipe body of the high-temperature gas inlet pipe 501 is connected to the desorption air inlet 203 through the connecting pipe 2. In this way, the high-temperature gas after combustion enters the activated carbon adsorption box 2 through the adsorption fan 6, and is used to desorb the exhaust gas adsorbed by the activated carbon adsorption bed.

[0022] A supplementary cooling fan 7 is connected to the pipe body of the high-temperature gas inlet pipe 501. The supplementary cooling fan 7 can add gas to the high-temperature gas inlet pipe 501 to reduce the temperature of the desorbed gas, thereby preventing the desorbed gas from overheating and causing damage to the activated carbon adsorption box 2. In addition, the supplementary cooling fan 7 can also increase the wind pressure of the high-temperature gas inlet pipe 501, promote the flow of the desorbed gas, and accelerate the desorption efficiency of the waste gas adsorbed by the activated carbon adsorption bed.

[0023] The outlet of the adsorption exhaust port 202 is connected to a clean gas exhaust pipe 301 through a connecting pipe 3, and the outlet of the clean gas exhaust pipe 301 is connected to an induced draft fan 8 and a chimney 10. An exhaust pipe is connected to the side of the catalytic bed burner 5, and the exhaust pipe is fixedly connected to the clean gas exhaust pipe 301. After the desorbed exhaust gas is burned by the catalytic bed burner 5, the generated harmless exhaust gas is discharged at a height of fifteen meters through the induced draft fan 8 and the chimney 10.

[0024] In the present scheme, an airflow detection component 3 is connected to the pipe body of the connecting pipe three. Due to the limitation of the pipeline layout, the amount of exhaust gas entering the activated carbon adsorption box 2 in each working state is different, which may cause the saturation of the activated carbon adsorption box 2 to appear in a certain order. In the present scheme, the gas flow rate discharged from the adsorption exhaust port 202 is detected by the airflow detection component 3 to determine the saturation state of the activated carbon adsorption box 2. When the gas flow rate is lower than the set value, the electric control valve 11 of the adsorption air inlet 201 is controlled to be closed by the controller, and then the electric control valve on the activated carbon adsorption box 2 in the standby state is controlled to be opened, so as to facilitate the desorption of the activated carbon adsorption bed in the saturated state, thereby improving the desorption efficiency.

[0025] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is limited by the attached embodiments and their equivalents.

Claims

1. An environmentally friendly air purification system, comprising a plurality of activated carbon adsorption boxes (2), wherein an activated carbon adsorption bed is arranged in the activated carbon adsorption box (2), and an adsorption air inlet (201), an adsorption air outlet (202), a desorption air inlet (203) and a desorption air outlet (204) are arranged on the box body of the activated carbon adsorption box (2), characterized in that: A dry filter box (1) is arranged outside the activated carbon adsorption box (2); an exhaust gas input main pipe (101) is fixedly provided at the output end of the dry filter box (1); an exhaust gas input branch pipe is fixedly connected between the exhaust gas input main pipe (101) and the activated carbon adsorption box (2); and an electric control valve (11) is connected to the pipe body of the exhaust gas input branch pipe; The pipe body of the desorption exhaust port (204) is connected to a desorption gas exhaust pipe (401) via a connecting pipe 1, the outlet of the desorption gas exhaust pipe (401) is connected to a catalytic bed burner (5), the outlet of the catalytic bed burner (5) is connected to a high-temperature gas inlet pipe (501), the pipe body of the high-temperature gas inlet pipe (501) is connected to an adsorption fan (6), and the pipe body of the high-temperature gas inlet pipe (501) is connected to the desorption gas inlet port (203) via a connecting pipe 2; The outlet of the adsorption exhaust port (202) is connected to a clean gas exhaust pipe (301) via a connecting pipe 3, and the outlet of the clean gas exhaust pipe (301) is connected to an induced draft fan (8) and a chimney (10); The pipe body of the connecting pipe 3 is connected with an airflow detection component (3).

2. The environmentally friendly air purification system according to claim 1, characterized in that: The adsorption air inlet (201), the adsorption air outlet (202), the desorption air inlet (203) and the desorption air outlet (204) are all connected to stop valves.

3. The environmentally friendly air purification system according to claim 1, characterized in that: The pipe body of the desorbed gas discharge pipe (401) is connected to a flame arrester (4).

4. The environmentally friendly air purification system according to claim 1, characterized in that: The high-temperature gas inlet pipe (501) is connected to a cooling fan (7).

5. The environmentally friendly air purification system according to claim 1, characterized in that: The catalytic bed burner (5) is connected to a combustible gas storage tank (9) on its side.

6. The environmentally friendly air purification system according to claim 1, characterized in that: An exhaust pipe is connected to the side of the catalytic bed burner (5), and the exhaust pipe is fixedly connected to the clean gas exhaust pipe (301).

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