A multi-chamber series catalytic combustion chamber structure for VOCs treatment

Abstract

The utility model discloses a kind of multi-chamber series catalytic combustion chamber structure for VOCs processing, the utility model relates to environmental protection technical field.It includes: air blower, the outer wall of air blower air outlet is connected with through pipe, the inner wall of through pipe is connected with solenoid valve, the outer wall of through pipe away from solenoid valve is connected with heat exchanger, the outer wall of heat exchanger away from solenoid valve one end is connected with combustion chamber by through pipe, the inner wall of air blower air inlet is fixedly connected with filter cartridge, the outer wall of air blower located filter cartridge is fixedly connected with filter screen;Through the double filtration structure of filter screen and filter cartridge in air blower air inlet, small impurities and larger dust in VOCs-containing waste gas can be effectively intercepted, avoid impurities into subsequent equipment channel to cause blockage, simultaneously cooperate with the series cabin room segmented by isolation plate, prevent waste gas short-circuit flow in combustion chamber, ensure that equipment long-term stable operation.

Description

Technical Field

[0001] This utility model relates to the field of environmental protection technology, specifically to a multi-chamber series catalytic combustion chamber structure for VOCs treatment. Background Technology

[0002] Traditional single-chamber catalytic combustion chambers have limited volume, resulting in a short residence time of VOCs exhaust gas within the combustion chamber. This can easily lead to fluctuations in purification efficiency due to incomplete reactions. When dealing with complex VOCs exhaust gases, it is difficult to meet stringent emission requirements. However, by setting up multi-chamber combustion chambers in series to extend the exhaust gas reaction time, designing a high-efficiency heat exchange system to recover waste heat, and equipping the equipment with a dual filtration mechanism to ensure the cleanliness of the equipment, the problem can be solved. Utility Model Content

[0003] (a) Technical problems to be solved

[0004] To address the shortcomings of existing technologies, this invention provides a multi-chamber series catalytic combustion chamber structure for VOCs treatment, which solves the problem of incomplete reaction.

[0005] (II) Technical Solution

[0006] To solve the above problems, this utility model achieves the following technical solution: a multi-chamber series catalytic combustion chamber structure for VOCs treatment, comprising: a blower; a through pipe is connected to the outer wall of the blower outlet; a solenoid valve is connected to the inner wall of the through pipe; a heat exchanger is connected to the outer wall of the through pipe away from the solenoid valve; a combustion chamber is connected to the outer wall of the heat exchanger away from the solenoid valve via the through pipe; a fuel delivery pipe is connected to the top of the combustion chamber; a burner is connected to the outer wall of the fuel delivery pipe inside the combustion chamber; a filter cartridge is fixedly connected to the inner wall of the blower inlet; and a filter screen is fixedly connected to the outer wall of the filter cartridge on the blower. This dual arrangement of a filter screen and a filter cartridge at the blower inlet... The filtration structure effectively removes impurities and dust from VOC-containing waste gas, preventing impurities from entering the subsequent heat exchanger and combustion chamber, thus preventing internal blockage and reducing interference from impurities on the catalytic combustion reaction. This ensures long-term stable operation of the equipment. The solenoid valve controls the on / off flow and volume of waste gas in the pipe, allowing for adjustments to the waste gas delivery volume based on actual VOC concentration and treatment requirements, enhancing the equipment's adaptability. It also allows for rapid cut-off of airflow during equipment maintenance or shutdown, improving operational safety. The fuel required for combustion is delivered to the burners inside the combustion chamber via a fuel delivery pipe. The burners ignite the fuel and generate high temperatures, creating a suitable environment for VOC catalytic combustion in the combustion chamber. The blower model is 2HB230-7AH260, a 7kW series blower.

[0007] Preferably, an isolation plate is fixedly connected to the inner wall of the combustion chamber. The inner wall of the isolation plate has through-holes. A solenoid valve is also connected to the inner wall of the combustion chamber at the end furthest from the heat exchanger, through a connecting pipe. The isolation plate divides the combustion chamber into multiple series-connected compartments, extending the residence time of VOC-containing exhaust gas within the combustion chamber. This allows the exhaust gas to fully contact the high-temperature environment, resulting in a more thorough catalytic combustion reaction, improved VOC degradation rate, and reduced emissions of untreated VOCs, thus meeting environmental protection requirements. The holes in the isolation plate ensure smooth flow of exhaust gas between the compartments. This design avoids short-circuiting of exhaust gas within the combustion chamber, ensuring that each compartment functions optimally and maximizing the utilization of internal space. The solenoid valves on the combustion chamber outlet and inlet pipes work together to provide bidirectional airflow control, facilitating the adjustment of gas pressure and exhaust gas residence time within the combustion chamber, further optimizing catalytic combustion. Furthermore, in case of equipment malfunction, the outlet solenoid valve can be quickly shut off to prevent the direct emission of unpurified gas, enhancing the environmental safety of equipment operation. The solenoid valves are ZCK series air solenoid valves.

[0008] Preferably, a heat-conducting pipe is continuously connected to the inner wall above the pipe connecting the combustion chamber and the solenoid valve. An insulation pipe is fitted over the heat-conducting pipe. The outer wall of the insulation pipe at the end away from the pipe is continuously connected to the inlet above the heat exchanger. An exhaust chimney is continuously connected to the outer wall of the solenoid valve at the end away from the insulation pipe. The heat-conducting pipe and the insulation pipe work together to form a waste heat recovery channel, which can efficiently transfer the waste heat generated by catalytic combustion in the combustion chamber to the heat exchanger for preheating the low-temperature exhaust gas entering the combustion chamber. This reduces the energy consumption required for additional heating of the exhaust gas, lowers equipment operating costs, and achieves energy recycling. The insulation pipe reduces heat loss during heat transfer, ensuring that the waste heat is utilized by the heat exchanger to the maximum extent. After preheating, the exhaust gas enters the combustion chamber and can reach the temperature required for catalytic combustion without consuming excessive fuel. This not only shortens the reaction start-up time but also reduces fuel consumption and decreases the emission of byproducts caused by incomplete fuel combustion, improving the environmental and economic performance of the equipment. The exhaust chimney provides an environmentally compliant emission channel for the purified gas.

[0009] Preferably, a drawer extending outwards is slidably connected to the inner wall below the combustion chamber, and a control box is fixedly connected to the outer wall of the combustion chamber. The control box controls the start and stop of the blower, solenoid valve, and burner via wires. The isolation plate divides the interior of the combustion chamber into three compartments. The drawer-type residue collection allows operators to easily clean internal residues without disassembling the combustion chamber, simplifying equipment maintenance procedures, reducing downtime for equipment maintenance, and improving maintenance convenience and overall operating efficiency. The control box enables centralized control of the core components of the equipment, eliminating the need for operators to operate each component separately, thus reducing operational difficulty. Simultaneously, it can adjust equipment operating parameters in real time according to actual working conditions, enabling the equipment to adapt to VOCs waste gas treatment needs of different concentrations and flow rates, improving the equipment's intelligence and flexibility. The three compartments connected in series ensure sufficient waste gas reaction while avoiding problems such as increased airflow resistance and excessive equipment size caused by too many compartments, achieving a balance between treatment effect and equipment practicality. It is suitable for industrial VOCs treatment scenarios of different scales. The interior of the combustion chamber and the space between the isolation plate are filled with a perovskite catalyst.

[0010] (III) Beneficial Effects

[0011] This invention provides a multi-chamber tandem catalytic combustion chamber structure for VOCs treatment. It has the following beneficial effects:

[0012] (i) The multi-chamber series catalytic combustion chamber structure for VOCs treatment, through the dual filtration structure of filter screen and filter cartridge set at the blower air inlet, can effectively intercept fine impurities and larger dust in VOCs-containing exhaust gas, preventing impurities from entering the subsequent equipment channels and causing blockage. At the same time, the series chambers divided by the isolation plate prevent the exhaust gas from short-circuiting in the combustion chamber, which not only ensures stable airflow to avoid the risk of entanglement, but also improves the VOCs degradation rate and ensures long-term stable operation of the equipment.

[0013] (ii) The multi-chamber series catalytic combustion chamber structure for VOCs treatment uses a sliding drawer to collect combustion residue. The staff can clean the combustion chamber without disassembling it, which simplifies the maintenance process and reduces equipment downtime. The control box can adjust the operating parameters of each component in real time and can be flexibly adjusted according to the exhaust gas conditions. It can adapt to different scale industrial scenarios, reduce the incidence of operating problems such as entanglement caused by equipment failure or parameter imbalance, and improve the ease of use and adaptability of the equipment. Attached Figure Description

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

[0015] Figure 2 This is a cross-sectional structural diagram of the present invention;

[0016] Figure 3 This utility model Figure 2 Schematic diagram of the structure at point A;

[0017] Figure 4 This is a schematic diagram of the working principle of the system of this utility model;

[0018] Figure 5 This is a schematic diagram of the control structure of the power control box of this utility model.

[0019] In the diagram: 1. Blower; 2. Solenoid valve; 3. Through pipe; 4. Heat exchanger; 5. Insulation pipe; 6. Combustion chamber; 7. Drawer; 8. Control box; 9. Fuel delivery pipe; 10. Exhaust chimney; 11. Filter cartridge; 12. Heat transfer pipe; 13. Isolation plate; 14. Filter screen; 15. Burner. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] Please see Figure 1-5 This utility model provides a multi-chamber series catalytic combustion chamber structure for VOCs treatment, including: a blower 1, a through pipe 3 connected to the outer wall of the blower 1 outlet, a solenoid valve 2 connected to the inner wall of the through pipe 3, a heat exchanger 4 connected to the outer wall of the through pipe 3 away from the solenoid valve 2, a combustion chamber 6 connected to the outer wall of the heat exchanger 4 away from the solenoid valve 2 through the through pipe 3, a fuel delivery pipe 9 connected to the top of the combustion chamber 6, a burner 15 connected to the outer wall of the fuel delivery pipe 9 inside the combustion chamber 6, a filter cartridge 11 fixedly connected to the inner wall of the blower 1 inlet, and a filter screen 14 fixedly connected to the outer wall of the blower 1 on the filter cartridge 11.

[0022] An isolation plate 13 is fixedly connected to the inner wall of the combustion chamber 6. The inner wall of the isolation plate 13 has through holes. The inner wall of the connecting pipe 3 at the end of the combustion chamber 6 away from the heat exchanger 4 is also connected to a solenoid valve 2.

[0023] A heat-conducting pipe 12 is connected through the inner wall above the pipe 3 between the combustion chamber 6 and the solenoid valve 2. An insulation pipe 5 is sleeved on the outside of the heat-conducting pipe 12. The outer wall of the insulation pipe 5 away from the pipe 3 is connected through the inlet above the heat exchanger 4. An exhaust chimney 10 is connected through the outer wall of the solenoid valve 2 away from the insulation pipe 5.

[0024] A drawer 7 extending outward is slidably connected to the inner wall below the combustion chamber 6. An electrical control box 8 is fixedly connected to the outer wall of the combustion chamber 6. The electrical control box 8 controls the start and stop of the blower 1, solenoid valve 2, and burner 15 through wires. The partition plate 13 divides the interior of the combustion chamber 6 into three compartments.

[0025] When in use, after the equipment is started, the blower 1 is first turned on through the control box 8. The exhaust gas containing VOCs enters from the air inlet of the blower 1. At this time, the exhaust gas first passes through the filter screen 14 located on the outside of the filter cartridge 11, which initially intercepts the fine impurities suspended in the exhaust gas. Then, the exhaust gas that has passed the initial filtration enters the filter cartridge 11 to further remove the dust and particulate matter with relatively large particle size in the exhaust gas, forming a double filtration effect to ensure the cleanliness of the exhaust gas entering the subsequent treatment stage and to avoid impurities clogging the equipment channel or interfering with the catalytic combustion reaction.

[0026] The pretreated clean exhaust gas is pressurized by the power of blower 1 and delivered to pipe 3 through the outlet of blower 1. At this time, the control box 8 controls the opening of the solenoid valve 2 on the inner wall of pipe 3 to regulate the flow rate and delivery state of the exhaust gas in pipe 3, so that the exhaust gas flows to heat exchanger 4 at a stable flow rate. At the same time, the high-temperature waste heat generated by the subsequent catalytic combustion in combustion chamber 6 is transferred to heat exchanger 4 through heat pipe 12. During the process of the high-temperature purified gas flowing to the outlet solenoid valve 2, some of the high-temperature gas enters heat pipe 12. Since heat pipe 12 is covered with heat insulation pipe 5, heat loss can be reduced. The high-temperature heat is continuously transferred to the inside of heat exchanger 4. When the VOCs-containing exhaust gas flows through heat exchanger 4, it fully exchanges with the high-temperature heat transferred by heat pipe 12. The exhaust gas temperature is preheated to a suitable range for catalytic combustion, laying the foundation for subsequent efficient reaction. At the same time, waste heat is recovered and utilized, reducing energy consumption. The inside of heat exchanger 4 is a pipe-type stacked discharge.

[0027] Preheated exhaust gas enters combustion chamber 6 through pipe 3. At this time, control box 8 controls fuel delivery pipe 9 to deliver combustion fuel to burner 15 inside combustion chamber 6. Burner 15 ignites the fuel and generates high temperature, creating a high-temperature environment inside combustion chamber 6 that meets the requirements of VOCs catalytic combustion. Because the isolation plate 13 fixedly connected to the inner wall of combustion chamber 6 divides it into three series chambers, after the exhaust gas enters combustion chamber 6, it first flows into the first chamber, where a preliminary catalytic combustion reaction occurs under high temperature. Subsequently, the exhaust gas flows into the second and third chambers in sequence through the holes on the isolation plate 13, gradually extending the residence time in the series chambers and fully contacting the high-temperature environment to ensure that VOCs are completely degraded into harmless CO2 and H2O, thereby improving the VOCs degradation rate. During this process, the holes on the isolation plate 13 ensure smooth flow of exhaust gas and prevent short-circuiting of exhaust gas, making full use of the internal space of combustion chamber 6.

[0028] The purified gas formed after the VOCs are fully degraded flows out from the end of the combustion chamber 6 away from the heat exchanger 4 and enters the pipe 3 at that end. At this time, the control box 8 controls the solenoid valve 2 on the inner wall of the pipe 3 to open, and cooperates with the solenoid valve 2 at the inlet end to adjust the gas pressure in the combustion chamber 6, ensuring that the purified gas flows stably to the exhaust chimney 10, and is finally discharged into the atmosphere in compliance with regulations through the exhaust chimney 10.

[0029] During long-term operation of the equipment, a small amount of residue produced by catalytic combustion in the combustion chamber 6, such as catalyst debris and impurity combustion products, will fall into the drawer 7 below the combustion chamber 6 under the action of gravity. The staff can periodically pull the drawer 7 out from the outer wall of the combustion chamber 6, clean the residue inside, and push it back into its original position. Maintenance can be completed without disassembling the combustion chamber 6, simplifying the operation process and reducing equipment downtime.

[0030] Throughout the process, the control box 8 controls the start-up and shutdown of the blower 1, solenoid valve 2, and burner 15 in real time via wires, adjusting according to actual working conditions such as exhaust gas concentration and flow rate to ensure that the equipment is always in a stable operating state, suitable for industrial VOCs treatment scenarios of different scales.

[0031] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0032] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A multi-chamber tandem catalytic combustion chamber structure for VOCs treatment, characterized in that, include: A blower (1) is connected to a pipe (3) through the outer wall of the blower (1) outlet. A solenoid valve (2) is connected through the inner wall of the pipe (3). A heat exchanger (4) is connected through the outer wall of the pipe (3) away from the solenoid valve (2). A combustion chamber (6) is connected through the pipe (3) at the outer wall of the heat exchanger (4) away from the solenoid valve (2). A fuel delivery pipe (9) is connected through the top of the combustion chamber (6). A burner (15) is connected through the outer wall of the fuel delivery pipe (9) inside the combustion chamber (6). A filter cylinder (11) is fixedly connected to the inner wall of the blower (1). A filter screen (14) is fixedly connected to the outer wall of the blower (1) located in the filter cylinder (11).

2. The multi-chamber series catalytic combustion chamber structure for VOCs treatment according to claim 1, characterized in that: An isolation plate (13) is fixedly connected to the inner wall of the combustion chamber (6). The inner wall of the isolation plate (13) has a through hole. The inner wall of the pipe (3) connected to the end of the combustion chamber (6) away from the heat exchanger (4) is also connected to a solenoid valve (2).

3. The multi-chamber series catalytic combustion chamber structure for VOCs treatment according to claim 2, characterized in that: A heat-conducting pipe (12) is connected through the inner wall of the pipe (3) between the combustion chamber (6) and the solenoid valve (2). An insulation pipe (5) is sleeved on the outside of the heat-conducting pipe (12). The outer wall of the insulation pipe (5) away from the pipe (3) is connected through the inlet above the heat exchanger (4). An exhaust chimney (10) is connected through the outer wall of the solenoid valve (2) away from the insulation pipe (5).

4. The multi-chamber series catalytic combustion chamber structure for VOCs treatment according to claim 2, characterized in that: The inner wall below the combustion chamber (6) is slidably connected to a drawer (7) extending out of the outer wall. The outer wall of the combustion chamber (6) is fixedly connected to a control box (8). The control box (8) controls the start and stop of the blower (1), solenoid valve (2), and burner (15) through wires. The isolation plate (13) divides the interior of the combustion chamber (6) into three compartments.

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