Rco regenerative catalytic combustion device

Abstract

The utility model discloses a kind of RCO heat accumulation type catalytic combustion device, it is related to waste gas treatment technical field, to solve the problem that prior art cannot preheat waste gas before waste gas enters, resulting in low-temperature waste gas directly into catalytic bed, not only increase auxiliary fuel consumption, also possibly affect catalyst activity and reaction efficiency.The heat exchange liquid circulation pipeline is fixedly arranged in the upper end of the combustion chamber, the heat exchange liquid circulation pipeline is extended from the side end face of the catalytic combustion device on both sides, and the liquid outlet and the liquid inlet are arranged respectively, the first inlet pipe is connected with waste gas preheating device on one side, a plurality of heat exchange pipes are arranged in the waste gas preheating device, the gas distribution cover and the gas collection cover are fixedly connected on both sides of the waste gas preheating device respectively, by adding waste gas preheating device, the waste gas before entering the device is preheated by using the waste heat generated by catalytic combustion, reduce the consumption of auxiliary fuel, reduce operating cost.

Description

Technical Field

[0001] This utility model relates to the field of waste gas treatment technology, specifically to an RCO regenerative catalytic combustion device. Background Technology

[0002] Regenerative Catalytic Oxidation (RCO) is a highly efficient organic waste gas treatment technology that combines the advantages of Regenerative Thermal Oxidation (RTO) and catalytic oxidation. It is suitable for treating low-concentration, high-volume industrial waste gas. Its core principle is as follows: waste gas is preheated to the catalytic reaction temperature (250~400℃) by a regenerative ceramic body. Under the action of a catalyst (such as platinum, palladium, or other precious metals), VOCs are oxidized and decomposed into CO2 and H2O, achieving a purification efficiency of over 95%. It is widely used in industries such as coating, printing, and chemicals, and features high energy efficiency, low operating costs, and minimal secondary pollution.

[0003] For example, patent announcement number CN222297950U discloses an RCO regenerative catalytic combustion device, including a combustion tank, gas pipes connecting both sides of the combustion tank, and catalytic material filled inside the combustion tank. The combustion tank has an adjustment structure inside, and a transmission structure located at the bottom of the adjustment structure. The adjustment structure includes a support plate fixedly connected inside the combustion tank. This invention uses the transmission structure to compress the support plate, causing it to move within the combustion tank. During this movement, the catalytic material on the surface is pushed, causing it to shift and change position. This repositioning of the catalytic material increases the uniformity of contact with the exhaust gas, improving the catalytic effect. This invention improves the existing method of storing catalyst inside regenerative catalytic combustion equipment, replacing the direct flat spreading method. This allows the bottom catalyst to fully contact the internal exhaust gas during heating, preventing the catalyst release effect from being affected.

[0004] However, the catalytic combustion devices in the above technologies do not have a waste gas preheating device, which cannot preheat the waste gas before it enters. This results in the low-temperature waste gas directly entering the catalytic bed, which not only increases the consumption of auxiliary fuel, but may also affect the catalyst activity and reaction efficiency. Therefore, the market urgently needs to develop an RCO regenerative catalytic combustion device to help people solve the existing problems. Utility Model Content

[0005] The purpose of this invention is to provide an RCO regenerative catalytic combustion device to solve the problem mentioned in the background art that the existing catalytic combustion device does not have a waste gas preheating device, and cannot preheat the waste gas before it enters, resulting in low-temperature waste gas directly entering the catalytic bed, which not only increases the consumption of auxiliary fuel, but may also affect the catalyst activity and reaction efficiency.

[0006] To achieve the above objectives, this utility model provides the following technical solution: an RCO regenerative catalytic combustion device, comprising a catalytic combustion device, wherein a combustion chamber is provided at the upper end of the catalytic combustion device, and a heat exchange liquid circulation pipeline is fixedly provided at the upper end of the combustion chamber. Both ends of the heat exchange liquid circulation pipeline extend out of one end face of the catalytic combustion device and are respectively provided with an outlet end and an inlet end. A first air inlet pipe is provided at the lower end of one end face of the catalytic combustion device, and a waste gas preheating device is connected to one side of the first air inlet pipe. Multiple heat exchange tubes are arranged in an array inside the waste gas preheating device, and a gas distribution hood and a gas collection hood are fixedly connected to both end faces of the waste gas preheating device, respectively.

[0007] Preferably, one side of the plurality of heat exchange tubes is inserted into one end face of the waste gas preheating device and is connected to the inside of the gas distribution hood, and the other side of the plurality of heat exchange tubes is inserted into the other end face of the waste gas preheating device and is connected to the inside of the gas collection hood.

[0008] Preferably, a second air inlet pipe is fixedly connected to the middle of the outer side of the air distribution hood, and an air delivery pipe is fixedly connected to the middle of the outer side of the air collection hood, with the air delivery pipe being fixedly connected to the first air inlet pipe.

[0009] Preferably, the upper end face of the waste gas preheating device is connected to the liquid outlet end via a return pipe, and a first three-way valve is fixedly connected to the return pipe, with an inlet pipe fixedly connected to the rear end of the first three-way valve.

[0010] Preferably, a liquid outlet pipe is fixedly installed at the lower end of the front end face of the exhaust gas preheating device, a second three-way valve is fixedly connected to the front end of the liquid outlet pipe, a drain pipe is fixedly connected to one side of the second three-way valve, and the other side of the second three-way valve is connected to the liquid inlet end through a conveying pipe, and a conveying pump is fixedly connected to the conveying pipe.

[0011] Preferably, the gas collecting hood and the gas distributing hood are each fixedly connected to a connecting ring on the side adjacent to the catalytic combustion device, and the two connecting rings are respectively fixedly connected to the two fixed rings by bolts.

[0012] Preferably, a sealing ring is provided between the fixing ring and the connecting ring.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] (1) In this utility model, by adding a waste gas preheating device, the waste heat generated by catalytic combustion is used to preheat the waste gas before it enters the device, which significantly improves the energy utilization rate, reduces the consumption of auxiliary fuel, and lowers the operating cost.

[0015] (2) In this utility model, a heat exchange fluid circulation system is adopted to efficiently transfer the high-temperature heat of the combustion chamber to the exhaust gas preheating device, ensuring that the exhaust gas reaches the optimal reaction temperature before entering the catalytic bed, thereby improving the activity of the catalyst and the reaction efficiency.

[0016] (3) In this utility model, the modular design (such as the quick disassembly and assembly structure of the gas distribution hood, gas collection hood and catalytic combustion device) facilitates the maintenance and cleaning of the heat exchange tubes. At the same time, the three-way valve is used to control the circulation and discharge of the heat exchange liquid, so that the system can operate stably and can flexibly adapt to different production needs (such as hot water recycling). Attached Figure Description

[0017] Figure 1 This is a front view of an RCO regenerative catalytic combustion device according to the present invention;

[0018] Figure 2 This is a front sectional view of the present invention;

[0019] Figure 3 This is a side sectional view of the exhaust gas preheating device of this utility model;

[0020] Figure 4 This is a top sectional view of the heat exchange fluid circulation pipeline of this utility model.

[0021] In the diagram: 1. Catalytic combustion device; 101. Combustion chamber; 102. Heat exchanger circulation pipeline; 103. Liquid outlet; 104. Liquid inlet; 105. First air inlet pipe; 2. Waste gas preheating device; 201. Heat exchanger tube; 202. Fixing ring; 203. Sealing ring; 3. Gas distribution hood; 301. Second air inlet pipe; 4. Gas collection hood; 401. Gas delivery pipe; 5. Connecting ring; 501. Bolt; 6. Liquid return pipe; 601. First three-way valve; 602. Liquid inlet pipe; 7. Liquid outlet pipe; 701. Second three-way valve; 702. Liquid drain pipe; 703. Delivery pipe; 704. Delivery pump. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0023] Please see Figure 1-4This utility model provides an embodiment of an RCO regenerative catalytic combustion device, comprising a catalytic combustion device 1, a combustion chamber 101 disposed at the upper end of the catalytic combustion device 1, and a heat exchange liquid circulation pipe 102 fixedly disposed at the upper end of the combustion chamber 101. The heat exchange liquid circulation pipe 102 is directly heated by the combustion of exhaust gas within the combustion chamber 101. Both ends of the heat exchange liquid circulation pipe 102 extend from one end face of the catalytic combustion device 1 and are respectively provided with an outlet end 103 and an inlet end 104. A first air inlet pipe 105 is provided at the lower end of the device. An exhaust gas preheating device 2 is connected to one side of the first air inlet pipe 105. Multiple heat exchange tubes 201 are arrayed inside the exhaust gas preheating device 2. A gas distribution hood 3 and a gas collection hood 4 are fixedly connected to the two end faces of the exhaust gas preheating device 2, respectively. One side of each heat exchange tube 201 is inserted into one end face of the exhaust gas preheating device 2 and communicates with the interior of the gas distribution hood 3. The other side of each heat exchange tube 201 is inserted into the other end face of the exhaust gas preheating device 2 and communicates with the interior of the gas collection hood 4. A second air inlet pipe 301 is fixedly connected to the middle of the outer side of the gas distribution hood 3. A gas supply pipe 401 is fixedly connected to the middle of the outer side of the gas hood 4. The gas supply pipe 401 is fixedly connected to the first air inlet pipe 105. The upper end face of the waste gas preheating device 2 is connected to the liquid outlet 103 through a return pipe 6. A liquid outlet pipe 7 is fixedly installed at the lower end of the front end face of the waste gas preheating device 2. A second three-way valve 701 is fixedly connected to the front end of the liquid outlet pipe 7. The other side of the second three-way valve 701 is connected to the liquid inlet 104 through a delivery pipe 703. A delivery pump 704 is fixedly connected to the delivery pipe 703. The delivery pump 704 pumps the heat exchange liquid inside the waste gas preheating device 2 through the delivery pipe 704. The feed pipe 703 delivers heat exchange liquid to the heat exchange liquid circulation pipe 102, so that the heat exchange liquid is heated when it flows through the heat exchange liquid circulation pipe 102. The heated heat exchange liquid flows back to the waste gas preheating device 2 through the return pipe 6 to heat multiple heat exchange tubes 201. The waste gas enters the gas distribution hood 3 through the second air inlet pipe 301 and is divided into multiple heat exchange tubes 201. The waste gas is preheated when it flows through the heat exchange tubes 201. After the divided waste gas is collected by the gas collection hood 4, it enters the catalytic combustion device 1 through the gas delivery pipe 401 and the first air inlet pipe 105.

[0024] Please see Figure 1 and Figure 2A drain pipe 702 is fixedly connected to one side of the second three-way valve 701, and a first three-way valve 601 is fixedly connected to the return pipe 6. An inlet pipe 602 is fixedly connected to the rear end of the first three-way valve 601. When the heat exchange liquid is water, the water temperature inside the waste gas preheating device 2 is detected by a temperature sensor. When the water temperature rises to a certain temperature, the second three-way valve 701 switches the passage to disconnect the outlet pipe 7 from the delivery pipe 703 and connect it to the drain pipe 702 to transport hot water outward for use in other production processes. After a large amount of hot water is discharged from the waste gas preheating device 2, the second three-way valve 701 switches the passage again. At the same time, the first three-way valve 601 switches the passage to connect the inlet pipe 602 to the inside of the waste gas preheating device 2 via the return pipe 6 for water replenishment. After replenishment, the first three-way valve 601 switches the passage again to connect the return pipe 6 to the outlet end 103.

[0025] Please see Figure 2 Each of the gas collecting hood 4 and the gas distributing hood 3 is fixedly connected to a connecting ring 5 on the side adjacent to the catalytic combustion device 1. The two connecting rings 5 ​​are fixedly connected to the two fixing rings 202 by bolts 501. A sealing ring 203 is provided between the fixing ring 202 and the connecting ring 5. By removing multiple bolts 501, the gas collecting hood 4 and the gas distributing hood 3 can be separated from the catalytic combustion device 1, which facilitates the cleaning of the inside of multiple heat exchange tubes 201 in the catalytic combustion device 1.

[0026] Working Principle: In operation, the heat exchange liquid inside the waste gas preheating device 2 is first pumped into the heat exchange liquid circulation pipeline 102 via the delivery pump 704 and the delivery pipe 703. The high-temperature heat generated during catalytic combustion of the waste gas in the combustion chamber 101 directly heats the heat exchange liquid circulation pipeline 102, raising the temperature of the heat exchange liquid flowing through the pipeline. The heated high-temperature heat exchange liquid then flows back to the waste gas preheating device 2 via the return pipe 6, heating the arrayed heat exchange tubes 201 as a whole. The waste gas to be treated enters the gas distribution hood 3 from the second inlet pipe 301 and is evenly distributed to each heat exchange tube 201. During its flow through the heated heat exchange tubes 201, the waste gas undergoes efficient heat exchange with the tube walls, achieving preheating. The preheated waste gas is collected by the gas collection hood 4 and then enters the catalytic combustion device 1 through the gas delivery pipe 401 and the first inlet pipe 105, thereby significantly reducing auxiliary fuel consumption and avoiding the adverse effects of low-temperature waste gas on catalyst activity. When water is used as the heat exchange medium, the system can monitor the water temperature through a temperature sensor. After reaching the set temperature, the system switches through the second three-way valve 701 to export hot water for use in other processes. The system can also automatically replenish water through the first three-way valve 601 and the inlet pipe 602 to maintain continuous operation.

[0027] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. An RCO regenerative catalytic combustion device, comprising a catalytic combustion device (1), characterized in that: The catalytic combustion device (1) has a combustion chamber (101) at its upper end. A heat exchange liquid circulation pipe (102) is fixedly installed at the upper end of the combustion chamber (101). The heat exchange liquid circulation pipe (102) extends from both the front and rear ends of one side of the catalytic combustion device (1) and is respectively provided with an outlet end (103) and an inlet end (104). A first air inlet pipe (105) is provided at the lower end of one side of the catalytic combustion device (1). A waste gas preheating device (2) is connected to one side of the first air inlet pipe (105). Multiple heat exchange tubes (201) are arranged in an array inside the waste gas preheating device (2). A gas distribution hood (3) and a gas collection hood (4) are fixedly connected to both sides of the waste gas preheating device (2).

2. The RCO regenerative catalytic combustion device according to claim 1, characterized in that: One side of each of the heat exchange tubes (201) is inserted into one end face of the exhaust gas preheating device (2) and is connected to the inside of the gas distribution hood (3). The other side of each of the heat exchange tubes (201) is inserted into the other end face of the exhaust gas preheating device (2) and is connected to the inside of the gas collection hood (4).

3. The RCO regenerative catalytic combustion device according to claim 1, characterized in that: The second air inlet pipe (301) is fixedly connected to the middle of the outer side of the air distribution hood (3), and the air supply pipe (401) is fixedly connected to the middle of the outer side of the air collection hood (4). The air supply pipe (401) is fixedly connected to the first air inlet pipe (105).

4. The RCO regenerative catalytic combustion device according to claim 1, characterized in that: The upper end face of the exhaust gas preheating device (2) is connected to the liquid outlet end (103) through a return pipe (6). A first three-way valve (601) is fixedly connected to the return pipe (6), and an inlet pipe (602) is fixedly connected to the rear end of the first three-way valve (601).

5. The RCO regenerative catalytic combustion device according to claim 1, characterized in that: The exhaust gas preheating device (2) has a liquid outlet pipe (7) fixedly installed at the lower end of the front end face. The front end of the liquid outlet pipe (7) is fixedly connected to a second three-way valve (701). A drain pipe (702) is fixedly connected to one side of the second three-way valve (701). The other side of the second three-way valve (701) is connected to the liquid inlet (104) through a conveying pipe (703). A conveying pump (704) is fixedly connected to the conveying pipe (703).

6. The RCO regenerative catalytic combustion device according to claim 1, characterized in that: The gas collecting hood (4) and the gas distributing hood (3) are each fixedly connected to a connecting ring (5) on the side adjacent to the catalytic combustion device (1). The two connecting rings (5) are fixedly connected to the two fixing rings (202) by bolts (501).

7. The RCO regenerative catalytic combustion device according to claim 6, characterized in that: A sealing ring (203) is provided between the fixing ring (202) and the connecting ring (5).

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