Regenerative catalytic combustion device with waste heat utilization

Abstract

This utility model relates to a regenerative catalytic combustion device with waste heat utilization. It aims to solve the technical problem that current catalytic combustion processes exchange heat through a heat storage body, but this requires constant switching of valves for air intake and exhaust, accelerating valve mechanical wear and increasing maintenance costs. The device includes a waste heat recovery mechanism comprising a ceramic heat storage box installed inside a combustion chamber. An igniter is installed on the inner wall of the combustion chamber for igniting the gas inside. The ceramic heat storage box has a sandwich structure. A catalytic bed is fixedly installed in the combustion chamber cavity on one side of the ceramic heat storage box. An exhaust pipe is provided at the end of the ceramic heat storage box near the catalytic bed. This utility model can maintain continuous waste gas treatment without the need for traditional valve switching mechanisms, effectively reducing energy consumption and maintenance costs while ensuring efficient and stable operation of the combustion reaction.

Description

Technical Field

[0001] This utility model relates to the field of catalytic combustion, specifically a regenerative catalytic combustion device with waste heat utilization. Background Technology

[0002] Catalytic combustion is an effective method for treating waste gas containing organic solvents. Its working principle involves raising the temperature of the waste gas containing organic solvents to a certain level, and then, with the help of a catalyst, causing the organic waste gas to undergo flameless combustion at a relatively low ignition temperature, oxidizing and decomposing it into CO2 and H2O, while releasing a large amount of heat energy.

[0003] Traditional catalytic combustion exchanges the heat of reaction through a heat exchanger. However, this process requires constant switching of the valve's intake and exhaust, accelerating valve wear and increasing maintenance costs. Therefore, a new technical solution is needed. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings of the existing technology, adapt to practical needs, and provide a regenerative catalytic combustion device with waste heat utilization. This solves the technical problem that the reaction heat of catalytic combustion itself is exchanged through the heat exchange of the heat storage body, but in this process, it is necessary to constantly switch the intake and exhaust of the valve, which accelerates the mechanical wear of the valve and thus increases the maintenance cost of the valve.

[0005] To achieve the objective of this utility model, the technical solution adopted is as follows: A regenerative catalytic combustion device with waste heat utilization is designed, comprising:

[0006] The waste heat recovery mechanism includes a ceramic heat storage box installed inside a combustion chamber. An igniter is installed on the inner wall of the combustion chamber for igniting and burning the gas inside the combustion chamber. The ceramic heat storage box has a double-layer structure. A catalytic bed is fixedly installed in the inner cavity of the combustion chamber on one side of the ceramic heat storage box. An exhaust pipe is provided at the end of the ceramic heat storage box near the catalytic bed. The end of the exhaust pipe near the ceramic heat storage box passes through the double-layer structure and communicates with the inner cavity of the ceramic heat storage box. A recovery pipe is fixedly installed at the top of the combustion chamber. One end of the recovery pipe passes through the combustion chamber and communicates with its inner cavity. The other end of the recovery pipe passes through the combustion chamber and the ceramic heat storage box and communicates with the inner cavity of the double-layer structure. An intake pipe is fixedly connected to the bottom of the ceramic heat storage box and extends through the combustion chamber to the outside of the combustion chamber.

[0007] Preferably, guide plates are fixedly connected to both sides of the inner cavity of the ceramic heat storage box, and the guide plates on both sides of the inner cavity of the ceramic heat storage box are staggered and inclined downward.

[0008] Preferably, a main fan is connected to the air intake pipe, an air intake pipe is connected to the end of the main fan away from the air intake pipe, a filter box is connected to the end of the air intake pipe away from the main fan, a filter plate is installed in the filter box, and a connecting pipe is connected to the end of the filter box away from the air intake pipe.

[0009] Preferably, an exhaust pipe is fixedly installed on the lower side of the ceramic heat storage box away from the catalytic bed. The end of the exhaust pipe near the ceramic heat storage box passes through the ceramic heat storage box and communicates with the interlayer. The end of the exhaust pipe away from the ceramic heat storage box passes through the combustion box and is located on the outside of the combustion box.

[0010] Preferably, one end of the combustion chamber is fixedly connected to an air supply pipe, and the end of the air supply pipe away from the burner is connected to a combustion-supporting fan.

[0011] Preferably, an induced draft fan is connected to the exhaust pipe, and a chimney is fixedly connected to the end of the induced draft fan away from the exhaust pipe.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0013] This invention combines a ceramic heat storage box, a jacket, an inlet pipe, an outlet pipe, a catalytic bed, and a recovery pipe. Organic waste gas is introduced into the inner cavity of the ceramic heat storage box through the inlet pipe, pre-treated by the catalytic bed, and then ignited by an igniter. The generated high-temperature gas circulates through the recovery pipe to the jacket on the ceramic heat storage box, releasing heat energy and allowing the ceramic heat storage box to accumulate heat and form a heat exchange reserve. When subsequent waste gas enters, the ceramic heat storage box preheats the organic waste gas using the accumulated heat energy. Combined with the activity of the highly efficient catalyst on the surface of the catalytic bed, this triggers a deep oxidation reaction of the organic matter at a temperature far below the conventional ignition temperature, achieving flameless catalytic combustion. The secondary heat energy released by combustion is continuously absorbed by the ceramic body, forming a self-sustaining heat cycle. This eliminates the need for traditional valve switching mechanisms to maintain continuous waste gas treatment, effectively reducing energy consumption and maintenance costs while ensuring efficient and stable operation of the combustion reaction. Attached Figure Description

[0014] Fig. 1 This is a schematic diagram of the overall external structure of this utility model;

[0015] Fig. 2 This is a schematic diagram of the overall internal cross-sectional structure of this utility model.

[0016] In the diagram: 1. Combustion chamber; 11. Exhaust pipe; 12. Recovery pipe; 13. Ceramic heat storage box; 14. Baffle plate; 15. Jacket; 16. Gas outlet pipe; 17. Catalytic bed; 2. Main fan; 21. Inlet pipe; 3. Filter box; 31. Intake pipe; 32. Connecting pipe; 33. Filter plate; 4. Exhaust fan; 41. Chimney; 5. Combustion fan; 51. Make-up air pipe; 6. Ignition device. Detailed Implementation

[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0018] Example 1: Regenerative catalytic combustion device with waste heat utilization, see [link to example]. Figs. 1-2 The system includes a waste heat recovery mechanism, comprising a ceramic heat storage box 13 installed inside a combustion chamber 1. An igniter 6 is installed on the inner wall of the combustion chamber 1 for igniting and burning the gas within the combustion chamber. The igniter 6 uses a mechanical triggering device to drive a hammer to impact a piezoelectric ceramic crystal, generating a 15-30kV high-voltage pulse using the piezoelectric effect. This pulse forms an electric spark at the electrode gap (0.5-1.2mm), achieving passive ignition and combustion in the combustion chamber. A sandwich layer 15 is provided on the ceramic heat storage box 13, and the inner cavity of the combustion chamber 1 is fixedly installed on one side of the ceramic heat storage box 13. The device includes a catalytic bed 17. An outlet pipe 16 is provided at one end of the ceramic heat storage box 13 near the catalytic bed 17. The outlet pipe 16, at one end near the ceramic heat storage box 13, penetrates the interlayer 15 and communicates with the inner cavity of the ceramic heat storage box 13. A recovery pipe 12 is fixedly installed on the top of the combustion chamber 1. One end of the recovery pipe 12 penetrates the combustion chamber 1 and communicates with its inner cavity. The other end of the recovery pipe 12 penetrates the combustion chamber 1 and the ceramic heat storage box 13, communicating with the inner cavity of the interlayer 15. An inlet pipe 2 is fixedly connected to the bottom of the ceramic heat storage box 13 and extends through the combustion chamber 1 to the outside of the combustion chamber 1.

[0019] During operation, organic waste gas is introduced into the inner cavity of the ceramic heat storage box 13 through the inlet pipe 21, pretreated by the catalytic bed 17, and then ignited by the igniter. The generated high-temperature gas is circulated through the recovery pipe 12 to the jacket 15 on the ceramic heat storage box 13 to release heat energy, allowing the ceramic heat storage box 13 to accumulate heat and form a heat exchange reserve. When subsequent waste gas to be treated enters, the ceramic heat storage box 13 preheats the organic waste gas with the accumulated heat energy. Combined with the active effect of the high-efficiency catalyst on the surface of the catalytic bed 17, the organic matter is prompted to trigger a deep oxidation reaction under conditions far below the conventional ignition temperature, realizing flameless catalytic combustion. The secondary heat energy released by combustion is continuously absorbed by the ceramic body, forming a self-sustaining heat cycle. It can maintain continuous waste gas treatment without the need for traditional valve switching mechanisms, effectively reducing the energy consumption and maintenance costs of the device, while ensuring efficient and stable operation of the combustion reaction.

[0020] For details, see Fig. 2The ceramic heat storage box 13 has guide plates 14 fixedly connected to both sides of its inner cavity. The guide plates 14 on both sides of the inner cavity of the ceramic heat storage box 13 are staggered and inclined downward. By setting the guide plates 14, the organic waste gas is guided to extend and flow along the preset turbulent path in the inner cavity of the ceramic heat storage box 13, which significantly improves the contact time between the organic waste gas and the high temperature ceramic heat storage box 13 and the heat transfer efficiency, effectively enhancing the stability and heat conversion efficiency of flameless combustion.

[0021] Further, see Fig. 1 The main fan 2 is connected to the air inlet pipe 21. The end of the main fan 2 away from the air inlet pipe 21 is connected to the suction pipe 31. The end of the suction pipe 31 away from the main fan 2 is connected to the filter box 3. The filter box 3 is equipped with a filter plate 33. The end of the filter box 3 away from the suction pipe 31 is connected to the connecting pipe 32. The main fan 2 facilitates the introduction of organic waste gas into the ceramic heat storage box 13.

[0022] It is worth noting that, see Fig. 2 An exhaust pipe 11 is fixedly installed on the lower side of the ceramic heat storage box 13 away from the catalytic bed 17. The end of the exhaust pipe 11 near the ceramic heat storage box 13 passes through the ceramic heat storage box 13 and communicates with the interlayer 15. The end of the exhaust pipe 11 away from the ceramic heat storage box 13 passes through the combustion box 1 and is placed outside the combustion box 1. An induced draft fan 4 is connected to the exhaust pipe 11. The end of the induced draft fan 4 away from the exhaust pipe 11 is fixedly connected to a chimney 41. The exhaust pipe 11 can directionally discharge the waste gas in the interlayer 15. Combined with the negative pressure generated by the induced draft fan 4, not only is the purified waste gas discharged in compliance with regulations through the chimney 41, but the high-temperature gas generated in the combustion stage is also directionally and quickly transported back to the interior of the interlayer 15 through the recovery pipe 12 to heat the ceramic heat storage box 13.

[0023] It is worth noting that, see Fig. 2 One end of the combustion chamber 1 is fixedly connected to an air supply pipe 51, and the end of the air supply pipe 51 away from the burner is connected to a combustion-supporting fan 5. When combustion occurs, air is introduced into the combustion chamber 1 through the combustion-supporting fan 5 to ensure sufficient oxygen in the combustion chamber 1, thereby ensuring complete combustion of organic waste gas and enabling the exhaust gas to meet ultra-low emission standards.

[0024] In addition, all components designed in this utility model are general standard parts or components known to those skilled in the art. Their structure and principle can be learned by those skilled in the art through technical manuals or conventional experimental methods. Those skilled in the art can fully implement them, so there is no need to elaborate. The content protected by this utility model does not involve improvements to the internal structure and method.

[0025] The embodiments disclosed herein are preferred embodiments, but are not limited thereto. Those skilled in the art can readily grasp the spirit of this utility model based on the above embodiments and make different extensions and variations. However, as long as they do not depart from the spirit of this utility model, they are all within the protection scope of this utility model.

Claims

1. A regenerative catalytic combustion device with waste heat utilization, characterized in that, include: The waste heat recovery mechanism includes a ceramic heat storage box (13) installed inside a combustion chamber (1). An igniter (6) is installed on the inner wall of the combustion chamber (1) for igniting and burning the gas inside the combustion chamber. A sandwich layer (15) is provided on the ceramic heat storage box (13). A catalytic bed (17) is fixedly installed in the inner cavity of the combustion chamber (1) on one side of the ceramic heat storage box (13). An exhaust pipe (16) is provided at one end of the ceramic heat storage box (13) near the catalytic bed (17). The exhaust pipe (16) is close to... One end of the ceramic heat storage box (13) passes through the interlayer (15) and communicates with the inner cavity of the ceramic heat storage box (13). A recovery pipe (12) is fixedly installed on the top of the combustion box (1). One end of the recovery pipe (12) passes through the combustion box (1) and communicates with its inner cavity. The other end of the recovery pipe (12) passes through the combustion box (1) and the ceramic heat storage box (13) and communicates with the inner cavity of the interlayer (15). An air inlet pipe (21) is fixedly connected to the bottom of the ceramic heat storage box (13) and extends through the combustion box (1) to the outside of the combustion box (1).

2. The regenerative catalytic combustion device with waste heat utilization as described in claim 1, characterized in that, Both sides of the inner cavity of the ceramic heat storage box (13) are fixedly connected with guide plates (14). The guide plates (14) on both sides of the inner cavity of the ceramic heat storage box (13) are staggered and are all inclined downward.

3. The regenerative catalytic combustion device with waste heat utilization as described in claim 1, characterized in that, The intake pipe (21) is connected to a main fan (2), and the end of the main fan (2) away from the intake pipe (21) is connected to an air intake pipe (31). The end of the air intake pipe (31) away from the main fan (2) is connected to a filter box (3). A filter plate (33) is installed inside the filter box (3), and the end of the filter box (3) away from the air intake pipe (31) is connected to a connecting pipe (32).

4. The regenerative catalytic combustion device with waste heat utilization as described in claim 1, characterized in that, An exhaust pipe (11) is fixedly installed on the lower side of the ceramic heat storage box (13) away from the catalytic bed (17). The end of the exhaust pipe (11) near the ceramic heat storage box (13) passes through the ceramic heat storage box (13) and communicates with the interlayer (15). The end of the exhaust pipe (11) away from the ceramic heat storage box (13) passes through the combustion box (1) and is placed on the outside of the combustion box (1).

5. The regenerative catalytic combustion device with waste heat utilization as described in claim 1, characterized in that, One end of the combustion chamber (1) is fixedly connected to a gas supply pipe (51), and the end of the gas supply pipe (51) away from the burner is connected to a combustion-supporting fan (5).

6. The regenerative catalytic combustion device with waste heat utilization as described in claim 4, characterized in that, An induced draft fan (4) is connected to the exhaust pipe (11), and a chimney (41) is fixedly connected to the end of the induced draft fan (4) away from the exhaust pipe (11).

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