Heat accumulating type catalytic combustion furnace for voc waste gas treatment
By setting up a preheating device and a rotating catalyst carrier in a regenerative catalytic combustion furnace for voc exhaust gas treatment, the problem of uneven gas heat is solved, and more efficient combustion and catalytic combustion effects are achieved, and equipment load and energy consumption are reduced.
Patent Information
- Application Number
- CN202510997609.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-07-19
- Publication Date
- 2025-09-02
- Estimated Expiration
- Not applicable · inactive patent
AI Technical Summary
The existing heat-regenerative catalytic combustion furnace for voc exhaust gas treatment has uneven internal gas heat during catalytic combustion, which affects the combustion effect.
A heat-regenerative catalytic combustion furnace for VOC waste gas treatment is designed. By setting a preheating device and a heating device on the intake pipe, a rotating air flow is formed using a heating pipe and a limiting device to extend the gas contact time, and a rotating catalyst carrier and bumps are used in the catalytic combustion device to increase the contact area, so as to achieve uniform distribution of gas temperature.
It improves combustion efficiency and catalytic combustion efficiency, reduces equipment working intensity and energy consumption, and reduces equipment quantity and cost.
Smart Images
Figure CN120576384A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of industrial organic waste gas treatment, in particular to a regenerative catalytic combustion furnace for treating VOC waste gas. Background Art
[0002] Organic waste gas (VOC waste gas) mainly includes hydrocarbon compounds, benzene and benzene derivatives, alcohols, ketones, phenols, aldehydes, esters, amines, nitriles, cyanides and other organic compounds. It mainly comes from automobile exhaust, electronics, chemical, petrochemical, coating, printing, painting, furniture, leather and other industries.
[0003] Characteristics of organic waste gas treatment: Organic waste gas is generally flammable and explosive, toxic and harmful, insoluble in water, soluble in organic solvents, and difficult to treat. Commonly used treatment methods for organic waste gas include activated carbon adsorption, catalytic combustion, catalytic oxidation, acid-base neutralization, and plasma treatment.
[0004] At present, when the regenerative catalytic combustion furnace used for VOC waste gas treatment is catalytically combusting, the internal gas will be heated unevenly, thus affecting the catalytic combustion effect. Summary of the Invention
[0005] In order to overcome the above-mentioned defects of the prior art, the present invention provides a regenerative catalytic combustion furnace for treating VOC waste gas to solve the problems existing in the above-mentioned background technology.
[0006] The present invention provides the following technical solution: a regenerative catalytic combustion furnace for treating VOC exhaust gas, comprising an air inlet pipe, a combustion device fixedly connected to the port of the air inlet pipe, the combustion device comprising a device shell and a cover plate, a heating device provided on the outer side of the cover plate, the heating device comprising a connecting disk, a connecting cylinder fixedly connected to the connecting disk, the connecting cylinder passing through the connecting disk, a connecting seat movably connected to the bottom of the connecting cylinder, a connecting pipe fixedly connected to the side of the connecting seat, an air hole formed on the connecting pipe, the interior of the connecting seat being communicated with the connecting pipe, a heating pipe provided at the center of the connecting disk, a base fixedly connected to the bottom of the heating pipe, and a catalytic combustion device provided on the side of the combustion device;
[0007] The catalytic combustion device includes a shell, a catalytic device is arranged inside the shell, a heater is rotatably connected to the bottom of the catalytic device, a waste heat collection pipe is fixedly connected to the center of the shell, the waste heat collection pipe is fixedly connected to the heater and the interior of the waste heat collection pipe is connected to the heater, and a connecting block and a circular groove are provided on the catalytic device.
[0008] Furthermore, a preheating device is fixedly connected to the air inlet pipe, and a dust collector, a dehumidifier and an oil mist separator are placed inside the preheating device, which is mainly used for preheating and pretreatment of the incoming gas.
[0009] Furthermore, an intake branch pipe is fixedly connected to the intake pipe, and the intake branch pipe is fixedly connected to the catalytic combustion device. A ventilation pipe is fixedly connected to the side of the combustion device, and the other end of the ventilation pipe is fixedly connected to the catalytic combustion device. An exhaust pipe is fixedly connected to the side of the catalytic combustion device. When in use, part of the incoming gas enters the catalytic combustion device through the intake branch pipe for direct catalytic combustion, and the other part enters the combustion device for combustion reaction. Dividing the incoming gas into two parts for reaction can reduce the working intensity of the catalytic combustion device, thereby reducing the number of chambers of the catalytic combustion device, improving combustion efficiency and reducing costs.
[0010] Furthermore, a heating device is fixedly connected to the bottom of the combustion device, a waste heat collection pipe is fixedly connected to the side of the heating device, the catalytic combustion device is fixedly connected to the waste heat collection pipe, the waste heat collection pipe passes through the catalytic combustion device and is fixedly connected to the preheating device, and water or paraffin is stored inside the waste heat collection pipe. The waste heat generated during internal heating can be absorbed by water or paraffin, and then transferred to the catalytic combustion device and the preheating device for heating the catalytic combustion device and providing preheating, thereby reducing energy consumption.
[0011] Furthermore, a through hole No. 1 is provided on the top of the base, and a through hole No. 2 is provided on the side of the base. The diameter of the through hole No. 1 is smaller than that of the through hole No. 2. A limiting device is fixedly connected to the interior of the device shell, and the cover plate and the connecting plate are movably connected.
[0012] During use, gas enters the combustion device from the air inlet pipe and enters the heating device through the cover plate. The gas introduced is heated by the heating pipe, and part of the gas is discharged from the air holes on the connecting pipe. The gas discharged from the top will continuously contact the gas discharged from the air holes during the continuous downward movement, and thus will be continuously heated. The gas not discharged from the air holes will be discharged from the No. 1 through hole and the No. 2 through hole at the base. The No. 1 through hole faces upward, which will heat the coming gas and push part of the gas upward, forming multiple rotating cyclones inside the limit device, extending the contact time of the gas, and making the temperature inside the gas more uniform, thereby improving the combustion efficiency.
[0013] Furthermore, a connecting head is fixedly connected to the top of the shell, a connecting cover is fixedly connected to the bottom of the connecting head, a No. 3 through hole is opened at the bottom of the connecting cover, and there are two of the connecting head, connecting cover and No. 3 through hole, one is fixedly connected to the ventilation pipe, and the other is fixedly connected to the air intake branch pipe.
[0014] Furthermore, the catalytic device includes a driving rod, the connecting block is fixedly connected to the side of the driving rod, the top of the connecting block is a slope, and the inclination angle is between thirty and forty-five degrees. A circular groove is opened on the connecting block, and the driving rod is connected to the heater.
[0015] Furthermore, a protrusion is fixedly connected to the connection block, and the protrusion is hemispherical and protrudes outward, thereby increasing the contact area with the gas. A catalyst carrier is placed on the protrusion, and a metal catalyst is placed inside the catalyst carrier.
[0016] During use, the gas entering the catalytic combustion device will pass through the connecting head and enter the outer shell from the No. 3 through hole opened at the bottom of the connecting cover. The No. 3 through hole is distributed at the edge of the connecting cover. When the gas is introduced, the gas enters from the outer shell near the inner wall, and the motor drives the catalytic device to rotate. The gas introduced into the catalytic combustion device will rotate with the driving rod. While the connecting block fixedly connected to the side of the driving rod rotates, the protrusion fixedly connected to the top of the connecting block will contact the gas for catalytic combustion reaction. At this time, the gas entering from the outer circle will cause uneven heating and cooling due to the length of contact time with the connecting block, thereby generating a rotating airflow at the circular groove. This rotating airflow will cause the gas with lower temperature to continue to contact the connecting block multiple times, so that the overall temperature distribution of the gas is more uniform, while prolonging the contact time with the protrusion, which is beneficial to improving the catalytic combustion efficiency of the gas.
[0017] Beneficial effects:
[0018] 1. The regenerative catalytic combustion furnace for VOC waste gas treatment, when in use, the gas is introduced into the combustion device from the air inlet pipe, the introduced gas is heated by the heating pipe, and part of the gas is discharged from the air holes on the connecting pipe. The gas discharged from the top will continuously contact with the gas discharged from the air holes during the process of continuous downward movement, thereby being continuously heated, extending the contact time of the gas, and making the temperature inside the gas more uniform, thereby improving the combustion efficiency.
[0019] 2. The VOC exhaust gas treatment uses a regenerative catalytic combustion furnace. The gas entering the catalytic combustion device will undergo a catalytic combustion reaction on the connecting block. At this time, the gas entering from the outer ring will cause uneven heating and cooling due to the length of contact time with the connecting block, thereby generating a rotating airflow at the circular groove. This rotating airflow will cause the gas with lower temperature to continue to contact the connecting block multiple times, thereby making the overall temperature distribution of the gas more uniform, while prolonging the contact time with the bump, which is beneficial to improving the catalytic combustion efficiency of the gas. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] Figure 1 This is a schematic diagram of the overall structure of a regenerative catalytic combustion furnace for treating VOC waste gas proposed by the present invention;
[0021] Figure 2 This is a schematic diagram of the internal structure of a regenerative catalytic combustion furnace combustion device for VOC waste gas treatment proposed by the present invention;
[0022] Figure 3 This is a schematic diagram of the internal structure of a regenerative catalytic combustion furnace heating device for VOC waste gas treatment proposed by the present invention;
[0023] Figure 4 This is a schematic structural diagram of a catalytic combustion device for a regenerative catalytic combustion furnace for treating VOC waste gas proposed by the present invention;
[0024] Figure 5 This is a structural schematic diagram of a catalytic device for a regenerative catalytic combustion furnace for treating VOC waste gas proposed by the present invention.
[0025] In the figure: 1. Air inlet pipe; 2. Preheating device; 3. Combustion device; 301. Device housing; 302. Cover plate; 303. Heating device; 3031. Connecting plate; 3032. Connecting seat; 3033. Connecting pipe; 3034. Connecting cylinder; 3035. Air hole; 3036. Heating pipe; 304. Limiting device; 305. Base; 306. Through hole No. 1; 307. Through hole No. 2; 4. Catalytic combustion device; 401. Housing; 402. Catalytic device; 4021. Driving rod; 4022. Circular groove; 4023. Connecting block; 4024. Bump; 403. Heater; 404. Connecting head; 405. Connecting cover plate; 406. Through hole No. 3; 5. Heating device; 6. Ventilation pipe; 7. Waste heat collection pipe; 8. Air inlet branch pipe; 9. Exhaust pipe. DETAILED DESCRIPTION
[0026] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.
[0027] Example 1
[0028] See also Figure 1-Figure 3A regenerative catalytic combustion furnace for treating VOC waste gas comprises an air intake pipe 1, a combustion device 3 is fixedly connected to the end of the air intake pipe 1, the combustion device 3 comprises a device shell 301 and a cover plate 302, a heating device 303 is provided on the outer side of the cover plate 302, the heating device 303 comprises a connecting disk 3031, a connecting cylinder 3034 is fixedly connected to the connecting disk 3031, the connecting cylinder 3034 passes through the connecting disk 3031, and a connecting seat 3032 is movably connected to the bottom of the connecting cylinder 3034, a connecting pipe 3033 is fixedly connected to the side of the connecting seat 3032, an air hole 3035 is opened on the connecting pipe 3033, and the interior of the connecting seat 3032 is communicated with the connecting pipe 3033, a heating pipe 3036 is provided at the center of the connecting disk 3031, and the bottom of the heating pipe 3036 is fixedly connected to the base 305, and a catalytic combustion device 4 is provided on the side of the combustion device 3.
[0029] A preheating device 2 is fixedly connected to the air inlet pipe 1. A dust collector, a dehumidifier and an oil mist separator are placed inside the preheating device 2, which is mainly used for preheating and pretreatment of the incoming gas.
[0030] An intake branch pipe 8 is fixedly connected to the intake pipe 1, and the intake branch pipe 8 is fixedly connected to the catalytic combustion device 4. A ventilation pipe 6 is fixedly connected to the side of the combustion device 3, and the other end of the ventilation pipe 6 is fixedly connected to the catalytic combustion device 4. An exhaust pipe 9 is fixedly connected to the side of the catalytic combustion device 4. When in use, part of the incoming gas enters the catalytic combustion device 4 through the intake branch pipe 8 for direct catalytic combustion, and the other part enters the combustion device 3 for combustion reaction. Dividing the incoming gas into two parts for reaction can reduce the working intensity of the catalytic combustion device 4, thereby reducing the number of chambers of the catalytic combustion device 4, improving combustion efficiency and reducing costs.
[0031] A heating device 5 is fixedly connected to the bottom of the combustion device 3, a waste heat collection pipe 7 is fixedly connected to the side of the heating device 5, the catalytic combustion device 4 is fixedly connected to the waste heat collection pipe 7, the waste heat collection pipe 7 passes through the catalytic combustion device 4 and is fixedly connected to the preheating device 2, and water or paraffin is stored inside the waste heat collection pipe 7. The waste heat generated when the inside of 3 is heated can be absorbed by water or paraffin through 7, and then transferred to the catalytic combustion device 4 and the preheating device 2 for heating the catalytic combustion device 4 and providing preheating, thereby reducing energy consumption.
[0032] A through hole No. 1 306 is provided on the top of the base 305, and a through hole No. 2 307 is provided on the side of the base 305. The diameter of the through hole No. 1 306 is smaller than that of the through hole No. 2 307. The interior of the device housing 301 is fixedly connected to the limiting device 304, and the cover plate 302 and the connecting plate 3031 are movably connected.
[0033] During use, gas enters the combustion device 3 from the air inlet pipe 1, enters the heating device 303 through the cover plate 302, and the gas introduced is heated by the heating pipe 3036. Part of the gas is discharged from the air hole 3035 on the connecting pipe 3033. The gas discharged from the top will continuously contact the gas discharged from the air hole 3035 during the process of continuous downward movement, and thus will be continuously heated. The gas not discharged from the air hole 3035 will be discharged from the No. 1 through hole 306 and the No. 2 through hole 307 on the base 305. The No. 1 through hole 306 faces upward, which will heat the gas coming down and push part of the gas upward, forming multiple rotating cyclones inside the limiting device 304, extending the contact time of the gas, and making the temperature inside the gas more uniform, thereby improving the combustion efficiency.
[0034] Example 2
[0035] See also Figure 4-Figure 5 The catalytic combustion device 4 includes a shell 401, a catalytic device 402 is arranged inside the shell 401, the bottom of the catalytic device 402 is rotatably connected to a heater 403, a waste heat collection pipe 7 is fixedly connected to the center of the shell 401, the waste heat collection pipe 7 is fixedly connected to the heater 403 and the inside of the waste heat collection pipe 7 is communicated with the heater 403, and a connecting block 4023 and a circular groove 4022 are provided on the catalytic device 402.
[0036] The top of the outer shell 401 is fixedly connected to a connecting head 404, the bottom of the connecting head 404 is fixedly connected to a connecting cover 405, and the bottom of the connecting cover 405 is provided with a No. 3 through hole 406. There are two connecting heads 404, connecting cover 405 and No. 3 through holes 406, one is fixedly connected to the ventilation pipe 6, and the other is fixedly connected to the air intake branch pipe 8.
[0037] The catalytic device 402 includes a driving rod 4021, and a connecting block 4023 is fixedly connected to the side of the driving rod 4021. The top of the connecting block 4023 is a slope with an inclination angle between thirty and forty-five degrees. The oblique placement will cause the internal gas to contact the connecting block 4023 for different times, thereby generating a temperature difference. This temperature difference will form a small cyclone inside, thereby making the heating more uniform. A circular groove 4022 is provided on the connecting block 4023, and the driving rod 4021 is connected to the heater 403.
[0038] A protrusion 4024 is fixedly connected to the connection block 4023 . The protrusion 4024 is hemispherical and protrudes outward, thereby increasing the contact area with the gas. A catalyst carrier is placed on the protrusion 4024 , and a metal catalyst is placed inside the catalyst carrier.
[0039] During use, the gas entering the catalytic combustion device 4 will pass through the connector 404 and enter the outer shell 401 from the third through hole 406 opened at the bottom of the connecting cover 405. The third through hole 406 is distributed at the edge of the connecting cover 405. When the gas is introduced, the gas enters from the outer shell 401 near the inner wall. The motor drives the catalytic device 402 to rotate. The gas introduced into the catalytic combustion device 4 will rotate with the driving rod 4021. While the connecting block 4023 fixedly connected to the side of the driving rod 4021 rotates, the protrusion 4024 fixedly connected to the top of the connecting block 4023 will contact the gas to undergo a catalytic combustion reaction. At this time, the gas entering from the outer circle will cause uneven heating and cooling due to the length of time it contacts the connecting block 4023, thereby generating a rotating airflow at the circular groove 4022. This rotating airflow will cause the gas with a lower temperature to continue to contact the connecting block 4023 multiple times, thereby making the overall temperature distribution of the gas more uniform and prolonging the contact time with the protrusion 4024, which is beneficial to improving the catalytic combustion efficiency of the gas.
[0040] While embodiments of the present invention have been shown and described, it will be appreciated 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 invention, and that the scope of the invention is defined by the appended claims and their equivalents.
Claims
1. A regenerative catalytic combustion furnace for treating VOC waste gas, comprising an air inlet pipe (1), characterized in that: A combustion device (3) is fixedly connected to the port of the air inlet pipe (1), and the combustion device (3) comprises a device housing (301) and a cover plate (302). A heating device (303) is provided on the outer side of the cover plate (302). The heating device (303) comprises a connecting disk (3031), and a connecting cylinder (3034) is fixedly connected to the connecting disk (3031). The connecting cylinder (3034) passes through the connecting disk (3031), and the bottom of the connecting cylinder (3034) is movable. A connecting seat (3032) is connected, a connecting pipe (3033) is fixedly connected to the side of the connecting seat (3032), an air hole (3035) is opened on the connecting pipe (3033), the interior of the connecting seat (3032) is communicated with the connecting pipe (3033), a heating pipe (3036) is provided at the center of the connecting plate (3031), the bottom of the heating pipe (3036) is fixedly connected to the base (305), and a catalytic combustion device (4) is provided on the side of the combustion device (3); The catalytic combustion device (4) comprises a shell (401), a catalytic device (402) is arranged inside the shell (401), a heater (403) is rotatably connected to the bottom of the catalytic device (402), a waste heat collection pipe (7) is fixedly connected to the center of the shell (401), the waste heat collection pipe (7) is fixedly connected to the heater (403), and the interior of the waste heat collection pipe (7) is communicated with the heater (403), and a connecting block (4023) and a circular groove (4022) are provided on the catalytic device (402).
2. The regenerative catalytic combustion furnace for treating VOC waste gas according to claim 1, characterized in that: A preheating device (2) is fixedly connected to the air inlet pipe (1), and a dust collector, a dehumidifier and an oil mist separator are placed inside the preheating device (2).
3. The regenerative catalytic combustion furnace for treating VOC waste gas according to claim 1, characterized in that: An air intake branch pipe (8) is fixedly connected to the air intake pipe (1), and the air intake branch pipe (8) is fixedly connected to the catalytic combustion device (4). A ventilation pipe (6) is fixedly connected to the side of the combustion device (3), and the other end of the ventilation pipe (6) is fixedly connected to the catalytic combustion device (4). An air outlet pipe (9) is fixedly connected to the side of the catalytic combustion device (4).
4. The regenerative catalytic combustion furnace for treating VOC waste gas according to claim 1, characterized in that: The bottom of the combustion device (3) is fixedly connected to a heating device (5), the side of the heating device (5) is fixedly connected to a waste heat collection pipe (7), the catalytic combustion device (4) is fixedly connected to the waste heat collection pipe (7), the waste heat collection pipe (7) passes through the catalytic combustion device (4) and is fixedly connected to the preheating device (2), and water or paraffin is stored inside the waste heat collection pipe (7).
5. The regenerative catalytic combustion furnace for treating VOC waste gas according to claim 1, characterized in that: A first through hole (306) is provided on the top of the base (305), a second through hole (307) is provided on the side of the base (305), the diameter of the first through hole (306) is smaller than that of the second through hole (307), the interior of the device housing (301) is fixedly connected to a limiting device (304), and the cover plate (302) and the connecting plate (3031) are movably connected.
6. The regenerative catalytic combustion furnace for treating VOC waste gas according to claim 3, characterized in that: The top of the housing (401) is fixedly connected to a connector (404), the bottom of the connector (404) is fixedly connected to a connector cover (405), the bottom of the connector cover (405) is provided with a third through hole (406), and the connector (404), the connector cover (405) and the third through hole (406) are provided in two pieces, one of which is fixedly connected to the vent pipe (6) and the other is fixedly connected to the intake branch pipe (8).
7. The regenerative catalytic combustion furnace for treating VOC waste gas according to claim 1, characterized in that: The catalytic device (402) includes a driving rod (4021), the connecting block (4023) is fixedly connected to the side of the driving rod (4021), the top of the connecting block (4023) is an inclined surface with an inclination angle between thirty and forty-five degrees, a circular groove (4022) is provided on the connecting block (4023), and the driving rod (4021) is connected to the heater (403).
8. The regenerative catalytic combustion furnace for treating VOC waste gas according to claim 7, characterized in that: A convex block (4024) is fixedly connected to the connecting block (4023), the convex block (4024) is hemispherical and protrudes outwards, a catalyst carrier is placed on the convex block (4024), and a metal catalyst is placed inside the catalyst carrier.