Waste gas treatment equipment

Abstract

The invention discloses waste gas treatment equipment, and belongs to the technical field of waste gas treatment.The waste gas treatment equipment comprises an adsorption assembly, a combustion catalysis assembly, a filtering assembly and a gas outlet assembly, the adsorption assembly is connected with the combustion catalysis assembly through a pipeline, and the combustion catalysis assembly is connected with the filtering assembly through a pipeline; and the filtering assembly is connected with the air outlet assembly. According to the waste gas treatment equipment disclosed by the invention, by arranging the adsorption assembly, the combustion catalysis assembly and the filtering assembly, various technologies such as physical filtration, chemical adsorption and catalytic oxidation are combined and applied, so that the purification effect of waste gas is more thorough, and higher emission standard requirements can be met; the waste gas catalyzed by the catalytic bed combustor enters the first activated carbon adsorption bed and the second activated carbon adsorption bed again, and the waste gas adsorbed again enters the filtering assembly to be filtered, so that the adsorbent can be fully regenerated and recycled.

Description

Technical Field

[0001] The present invention relates to the technical field of waste gas treatment, and in particular to a waste gas treatment device. Background Art

[0002] Catalyst equipment is a device used to promote chemical reactions. Catalyst equipment is widely used in chemical, petroleum, fertilizer, pharmaceutical and other industries. Catalysts are usually added to the reactor by filling or coating to improve reaction efficiency and selectivity. At the same time, catalyst equipment also needs to have high temperature, high pressure, corrosion resistance and other characteristics to adapt to various reaction conditions.

[0003] In the prior art, catalyst equipment is used to treat waste gas, which is circulated in a catalytic bed and an adsorption bed and then discharged through a chimney. However, there are still a small amount of chemical substances that cannot be treated during the treatment by physical filtration and catalytic oxidation. In the long run, the concept of environmental protection cannot be achieved. Summary of the invention

[0004] The purpose of the present invention is to provide a waste gas treatment equipment. By setting an adsorption component, a combustion catalytic component and a filtering component, a variety of technologies such as physical filtration, chemical adsorption and catalytic oxidation are combined and used, so that the purification effect of the waste gas is more thorough and can meet higher emission standards. The waste gas catalyzed by the catalytic bed burner enters the interior of the first activated carbon adsorption bed and the second activated carbon adsorption bed again, and the waste gas adsorbed again enters the filtering component for filtration, so that the adsorbent can be fully regenerated and recovered, thereby reducing the cost of waste gas treatment. In the later stage of the treatment process, membrane separation technology is used to further improve the waste gas purification efficiency. At the same time, harmful substances in the waste gas can be further separated and recovered, thereby realizing the resource utilization and harmlessness of waste gas treatment.

[0005] To achieve the above-mentioned objectives, the present invention provides an exhaust gas treatment device, including an adsorption component, a combustion catalytic component, a filtering component and an exhaust component, wherein the adsorption component is connected to the combustion catalytic component through a pipeline, the combustion catalytic component is connected to the filtering component through a pipeline, and the filtering component is connected to the exhaust component.

[0006] Preferably, the adsorption assembly includes a filter box, the air inlet of the filter box is connected to the first air inlet pipe, the air outlet of the filter box is connected to the second air inlet pipe, the other end of the second air inlet pipe is connected to the third air inlet pipe, and the two ends of the third air inlet pipe are respectively connected to the first activated carbon adsorption bed and the second activated carbon adsorption bed.

[0007] Preferably, the combustion catalytic assembly includes a catalytic bed burner, which is placed on one side of the second activated carbon adsorption bed, and is connected to the pressure box through a third delivery pipe. A flame arrester is installed on the catalytic bed burner, and the catalytic bed burner is connected to the flame arrester through a fourth delivery pipe. The air inlet of the flame arrester is connected to a fourth air inlet pipe, and the other end of the fourth air inlet pipe is connected to a fifth air inlet pipe, and the fifth air inlet pipe is connected to the first activated carbon adsorption bed and the second activated carbon adsorption bed.

[0008] Preferably, the filtration assembly includes the pressure box, a membrane support layer is installed inside the pressure box, the membrane support layer is fixedly connected to the pressure box via a connecting bracket, a permeation layer is installed on the membrane support layer, and a surface layer is attached to the side of the permeation layer away from the membrane support layer.

[0009] Preferably, the air outlet assembly includes a first air outlet pipe, the first air outlet pipe is connected to the pressure box, the first air outlet pipe is connected to the third air outlet pipe, the other end of the third air outlet pipe is connected to the second air outlet pipe, the second air outlet pipe is connected to the first activated carbon adsorption bed and the second activated carbon adsorption bed, one end of the third air outlet pipe is connected to the induced draft fan, and the air outlet of the induced draft fan is connected to an exhaust pipe.

[0010] Preferably, the first activated carbon adsorption bed and the second activated carbon adsorption bed are both connected to a first delivery pipe, the other end of the first delivery pipe is connected to a second delivery pipe, and the other end of the second delivery pipe is connected to the catalytic bed burner.

[0011] Preferably, the third air intake pipe is connected to the second air intake pipe via a tee, the third air intake pipe on both sides of the tee is respectively installed with a first valve, the third delivery pipe is installed with a second valve, and the first air outlet pipe is installed with a third valve.

[0012] Preferably, a controller is fixedly mounted on the outside of the filter box.

[0013] Therefore, the present invention adopts the above-mentioned exhaust gas treatment equipment, which has the following beneficial effects: (1) By setting up adsorption components, combustion catalytic components and filtration components, a variety of technologies such as physical filtration, chemical adsorption and catalytic oxidation are combined and used to make the exhaust gas purification effect more thorough and meet higher emission standards.

[0014] (2) The exhaust gas catalyzed by the catalytic bed burner re-enters the first activated carbon adsorption bed and the second activated carbon adsorption bed, and the re-adsorbed exhaust gas enters the filter assembly for filtration, so that the adsorbent can be fully regenerated and recovered, reducing the cost of exhaust gas treatment. In the later stage of the treatment process, membrane separation technology is used to further improve the exhaust gas purification efficiency. At the same time, harmful substances in the exhaust gas can be further separated and recovered, realizing the resource utilization and harmlessness of exhaust gas treatment.

[0015] The technical solution of the present invention is further described in detail below through the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of a three-dimensional structure from a first perspective of an embodiment of an exhaust gas treatment device of the present invention; Figure 2 is a schematic diagram of a third perspective structure of an embodiment of an exhaust gas treatment device of the present invention; Figure 3 It is a cross-sectional view of a pressure box of an embodiment of a waste gas treatment device of the present invention.

[0017] Reference numerals 1. First air inlet duct; 2. Filter box; 3. Second air inlet duct; 4. Third air inlet duct; 5. First valve; 6. First activated carbon adsorption bed; 7. First delivery pipe; 8. Second delivery pipe; 9. Catalytic bed burner; 10. Flame arrester; 11. Fourth delivery pipe; 12. Fourth air inlet duct; 13. Fifth air inlet duct; 14. Third delivery pipe; 15. Second valve; 16. Pressure box; 17. First air outlet duct; 18. Third valve; 19. Third air outlet duct; 20. Second air outlet duct; 21. Draft fan; 22. Exhaust pipe; 23. Surface layer; 24. Permeation layer; 25. Membrane support layer; 26. Controller; 27. Second activated carbon adsorption bed. DETAILED DESCRIPTION

[0018] The technical solution of the present invention is further described below through the accompanying drawings and embodiments.

[0019] Unless otherwise defined, the technical terms or scientific terms used in the present invention should be understood by people with ordinary skills in the field to which the present invention belongs. The words "first", "second" and similar words used in the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. "Include" or "comprise" and similar words mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0020] Embodiment 1 like Figures 1 to 3 As shown, the present invention provides an exhaust gas treatment device, including an adsorption component, a combustion catalytic component, a filter component and an exhaust component, wherein the adsorption component is connected to the combustion catalytic component through a pipeline, the combustion catalytic component is connected to the filter component through a pipeline, and the filter component is connected to the exhaust component. The adsorption component is used to adsorb gaseous organic pollutants in the exhaust gas on the surface of the activated carbon inside it, the combustion catalytic component is used to convert the gaseous organic pollutants into carbon dioxide and water vapor after reacting with the catalyst, the filter component is used to filter the exhaust gas passing through the combustion catalytic component to meet the emission standards again, and the exhaust component is used to discharge the filtered clean gas.

[0021] The adsorption assembly includes a filter box 2, which is used to filter the incoming gas for the first time to filter out particulate pollutants. A controller 26 is fixedly installed on the outside of the filter box 2, and the controller 26 is used to control the operation of the electrical components. The air inlet of the filter box 2 is connected to the first air inlet pipe 1, and the first air inlet pipe 1 is used to pass the exhaust gas into the filter box 2. The air outlet of the filter box 2 is connected to the second air inlet pipe 3, and the second air inlet pipe 3 is used to transport the filtered exhaust gas away. The other end of the second air inlet pipe 3 is connected to the third air inlet pipe 4, and the two ends of the third air inlet pipe 4 are respectively connected to the first activated carbon adsorption bed 6 and the second activated carbon adsorption bed 27. The filtered exhaust gas enters the third air inlet pipe 4 through the second air inlet pipe 3, and passes through the third air inlet pipe 4 into the first activated carbon adsorption bed 6 and the second activated carbon adsorption bed 27 to adsorb gaseous organic pollutants in the exhaust gas.

[0022] The combustion catalytic component includes a catalytic bed burner 9, which is placed on one side of the second activated carbon adsorption bed 27. The catalytic bed burner 9 can promote complete combustion and reduce the combustion temperature. Its catalytic process can more effectively control the emission of harmful gases and improve the treatment efficiency. The catalyst in the catalytic bed will adsorb pollutants in the exhaust gas and accelerate the oxidation reaction. The oxidation reaction will generate heat, further accelerating the oxidation reaction of pollutants in the exhaust gas. The reaction products are decomposed after passing through the catalytic bed.

[0023] A flame arrester 10 is installed on the catalytic bed burner 9. The catalytic bed burner 9 and the flame arrester 10 are connected via a fourth delivery pipe 11. The flame arrester 10 can prevent backfire, isolate fire sources, filter sparks and stabilize combustion. The air inlet of the flame arrester 10 is connected to the fourth air inlet pipe 12, the other end of the fourth air inlet pipe 12 is connected to the fifth air inlet pipe 13, the fifth air inlet pipe 13 is connected to the first activated carbon adsorption bed 6 and the second activated carbon adsorption bed 27, the first activated carbon adsorption bed 6 and the second activated carbon adsorption bed 27 are both connected to the first delivery pipe 7, one end of the first delivery pipe 7 is connected to the second delivery pipe 8, and the end of the second delivery pipe 8 away from the first delivery pipe 7 is connected to the inside of the catalytic bed burner 9; after catalysis by the catalytic bed burner 9, the catalyzed gas passes through the second delivery pipe 8 and the first delivery pipe 7, enters the first activated carbon adsorption bed 6 and the second activated carbon adsorption bed 27, so that it passes through the filtration and adsorption inside the first activated carbon adsorption bed 6 and the second activated carbon adsorption bed 27 again, and then passes through the third outlet pipe 19 and the second outlet pipe 20 to be discharged out of the device.

[0024] The filter assembly includes a pressure box 16, and the catalytic bed burner 9 is connected to the pressure box 16 through a third delivery pipe 14. The pressure box 16 is used to filter the exhaust gas in the catalytic bed burner 9. A membrane support layer 25 is installed inside the pressure box 16 of the catalytic bed burner 9. The membrane support layer 25 is fixedly connected to the pressure box 16 through a connecting bracket, and the connecting bracket is used to support the membrane support layer 25. A permeation layer 24 is installed on the membrane support layer 25, and the permeation layer 24 is used to filter and adsorb the exhaust gas transported from the catalytic bed burner 9.

[0025] A surface layer 23 is attached to the side of the permeation layer 24 away from the membrane support layer 25. The membrane support layer 25 is made of a polymer material and its function is to provide mechanical strength and stability for the membrane. The permeation layer 24 is made of a material with a specific pore size and selectivity, and can selectively separate molecules or ions through the membrane. The surface layer 23 is a thin film that is used to protect the permeation layer 24 and prevent it from being contaminated and damaged. That is, a certain pressure is applied to the mixed exhaust gas on the membrane so that harmless components therein can pass through the permeation layer 24, while other components are intercepted on the membrane surface. The gas passing through the permeation layer 24 passes through the first outlet pipe 17 and the third outlet pipe 19, and is finally discharged out of the device through the filter box 2.

[0026] The gas outlet assembly includes a first gas outlet pipe 17, which is connected to the pressure box 16 and is used to discharge the gas filtered in the pressure box 16. The first gas outlet pipe 17 is connected to the third gas outlet pipe 19, which plays a role in conveying the filtered waste gas. The other end of the third gas outlet pipe 19 is connected to the second gas outlet pipe 20, which is connected to the first activated carbon adsorption bed 6 and the second activated carbon adsorption bed 27, and is used to discharge the purified waste gas in the first activated carbon adsorption bed 6 and the second activated carbon adsorption bed 27. One end of the third gas outlet pipe 19 is connected to the induced draft fan 21, and the gas outlet of the induced draft fan 21 is connected to the exhaust pipe 22, and the induced draft fan 21 is used to drive the purified waste gas to flow to the exhaust pipe 22 and be discharged through the exhaust pipe 22.

[0027] The first activated carbon adsorption bed 6 and the second activated carbon adsorption bed 27 are both connected to the first delivery pipe 7. The other end of the first delivery pipe 7 is connected to the second delivery pipe 8. The other end of the second delivery pipe 8 is connected to the catalytic bed burner 9. The second delivery pipe 8 is used to transport the exhaust gas generated in the catalytic bed burner 9 to the first delivery pipe 7, and transport the exhaust gas to the first activated carbon adsorption bed 6 and the second activated carbon adsorption bed 27 through the first delivery pipe 7.

[0028] The third air intake pipe 4 is connected to the second air intake pipe 3 through a tee, and the third air intake pipe 4 on both sides of the tee is respectively installed with a first valve 5, the first air outlet pipe 17 is installed with a third valve 18, and the third delivery pipe 14 is installed with a second valve 15. The first valve 5 is used to control the exhaust gas to enter the first activated carbon adsorption bed 6 and the second activated carbon adsorption bed 27, the second valve 15 is used to control the exhaust gas to enter the pressure box 16, and the third valve 18 is used to control the discharge of the gas inside the pressure box 16.

[0029] When the exhaust gas treatment equipment provided by the present invention is used, the exhaust gas first enters the filter box 2 through the first air intake pipe 1, and the filter box 2 intercepts the particulate pollutants in the exhaust gas. Then, the exhaust gas in the filter box 2 enters the first activated carbon adsorption bed 6 and the second activated carbon adsorption bed 27 through the second air intake pipe 3 and the third air intake pipe 4 for adsorption treatment. The gaseous organic pollutants are adsorbed on the surface of the activated carbon, and the clean exhaust gas is discharged through the second exhaust pipe 20 and the third exhaust pipe 19 under the action of the induced draft fan 21.

[0030] When the activated carbon adsorbed with gaseous organic pollutants reaches a certain adsorption limit, the activated carbon will start the desorption and regeneration process to desorb the gaseous organic pollutants originally adsorbed on the activated carbon. The gaseous organic pollutants pass through the fifth air intake pipe 13, the fourth air intake pipe 12, the flame arrester 10, and the fourth delivery pipe 11 and enter the catalytic bed burner 9 for catalytic combustion. The catalyst in the catalytic bed burner 9 will adsorb the pollutants in the exhaust gas to accelerate oxidation. Heat is generated during the oxidation process, which further accelerates the oxidation process of the pollutants in the exhaust gas.

[0031] The combustion reaction releases heat, resulting in different temperatures in different areas, which leads to a temperature gradient inside the catalytic bed burner 9. The high temperature area is close to the catalyst bed, and as the gas flows away from the catalyst bed, the temperature gradually decreases. This temperature change leads to the stratification of gas components. The reaction rates of different components may be different. Some substances react quickly under the action of the catalyst, while others require more contact time and higher temperatures to be completely converted, resulting in uneven distribution of reaction products. The catalytic gas may contain by-products that need further treatment, so it is necessary to adsorb and filter incompletely oxidized organic compounds or other pollutants. These by-products may require further treatment, such as adsorption or other purification technologies, to ensure that the discharged gas meets environmental standards. After decomposing the organic pollutants, the catalytically completed gas enters the first activated carbon adsorption bed 6 and the second activated carbon adsorption bed 27 through the first delivery pipe 7 and the second delivery pipe 8 to filter and adsorb it again, and the purified gas is discharged through the second outlet pipe 20 and the third outlet pipe 19.

[0032] In the catalytic bed combustor 9, the exhaust gas generated by combustion is mainly carbon dioxide (CO 2 ) and water vapor (H 2 O), these products are relatively harmless and can be removed by simple filtration to remove dust and other particulate matter. The exhaust gas generated in the catalytic bed burner 9 enters the pressure box 16 through the third delivery pipe 14 for filtration, that is, a certain pressure is applied to the mixed exhaust gas on the membrane so that the harmless components can pass through the permeation layer 24, while other components are intercepted on the membrane surface. The filtered gas is discharged from the device through the first outlet pipe 17 and the third outlet pipe 19 and finally discharged from the filter box 2.

[0033] Therefore, the present invention adopts the above-mentioned exhaust gas treatment equipment, and by setting an adsorption component, a combustion catalytic component and a filtering component, a variety of technologies such as physical filtration, chemical adsorption and catalytic oxidation are combined for use, so that the exhaust gas purification effect is more thorough and can meet higher emission standards. The exhaust gas catalyzed by the catalytic bed burner enters the first activated carbon adsorption bed and the second activated carbon adsorption bed again, and the waste gas adsorbed again enters the filtering component for filtration, so that the adsorbent can be fully regenerated and recovered, thereby reducing the cost of exhaust gas treatment. In the later stage of the treatment process, membrane separation technology is used to further improve the exhaust gas purification efficiency. At the same time, harmful substances in the exhaust gas can be further separated and recovered, thereby realizing the resource utilization and harmlessness of exhaust gas treatment.

[0034] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that they can still modify or replace the technical solution of the present invention with equivalents, and these modifications or equivalent replacements cannot cause the modified technical solution to deviate from the spirit and scope of the technical solution of the present invention.

Claims

1. A waste gas treatment device, characterized in that: It comprises an adsorption component, a combustion catalytic component, a filtering component and an exhaust component. The adsorption component is connected to the combustion catalytic component through a pipeline, the combustion catalytic component is connected to the filtering component through a pipeline, and the filtering component is connected to the exhaust component.

2. The exhaust gas treatment equipment according to claim 1, characterized in that: The adsorption assembly includes a filter box, an air inlet of the filter box is connected to a first air inlet pipe, an air outlet of the filter box is connected to a second air inlet pipe, the other end of the second air inlet pipe is connected to a third air inlet pipe, and both ends of the third air inlet pipe are respectively connected to a first activated carbon adsorption bed and a second activated carbon adsorption bed.

3. The exhaust gas treatment equipment according to claim 2, characterized in that: The combustion catalytic component includes a catalytic bed burner, which is placed on one side of the second activated carbon adsorption bed. The catalytic bed burner is connected to the pressure box through a third delivery pipe. A flame arrester is installed on the catalytic bed burner. The catalytic bed burner is connected to the flame arrester through a fourth delivery pipe. The air inlet of the flame arrester is connected to a fourth air inlet pipe, and the other end of the fourth air inlet pipe is connected to a fifth air inlet pipe. The fifth air inlet pipe is connected to the first activated carbon adsorption bed and the second activated carbon adsorption bed.

4. The exhaust gas treatment equipment according to claim 3, characterized in that: The filtration assembly includes the pressure box, a membrane support layer is installed inside the pressure box, the membrane support layer is fixedly connected to the pressure box via a connecting bracket, a permeation layer is installed on the membrane support layer, and a surface layer is attached to the side of the permeation layer away from the membrane support layer.

5. The exhaust gas treatment equipment according to claim 4, characterized in that: The air outlet assembly includes a first air outlet pipe, the first air outlet pipe is connected to the pressure box, the first air outlet pipe is connected to the third air outlet pipe, the other end of the third air outlet pipe is connected to the second air outlet pipe, the second air outlet pipe is connected to the first activated carbon adsorption bed and the second activated carbon adsorption bed, one end of the third air outlet pipe is connected to the induced draft fan, and the air outlet of the induced draft fan is connected to an exhaust pipe.

6. The exhaust gas treatment equipment according to claim 3, characterized in that: The first activated carbon adsorption bed and the second activated carbon adsorption bed are both connected to a first delivery pipe, the other end of the first delivery pipe is connected to a second delivery pipe, and the other end of the second delivery pipe is connected to the catalytic bed burner.

7. The exhaust gas treatment equipment according to claim 5, characterized in that: The third air intake pipe is connected to the second air intake pipe via a tee, the third air intake pipes on both sides of the tee are respectively installed with first valves, the third delivery pipe is installed with a second valve, and the first air outlet pipe is installed with a third valve.

8. The exhaust gas treatment equipment according to claim 2, characterized in that: A controller is fixedly installed outside the filter box.

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