Process and equipment for catalytic reduction of nvocs embedded in rto

Abstract

This invention discloses a high-efficiency, low-consumption NVOCs catalytic reduction process and equipment embedded in an RTO (Regenerative Thermal Oxidizer), belonging to the field of organic waste gas treatment. It includes a combustion chamber, several heat storage chambers, and an integrated pipeline. Of the two pipes at the top and bottom of the integrated pipeline, one is an inlet pipe and the other is an exhaust pipe. The middle pipe is a central gas chamber inlet / outlet connection pipe. The central gas chamber inlet / outlet connection pipe contains an NVOCs catalyst. The central gas chamber inlet / outlet connection pipe is divided into several sub-inlet / outlet connection pipes by several partitions, each corresponding to a heat storage chamber. Each sub-inlet / outlet connection pipe has two vents, connected to the upper and lower pipes respectively. Each vent is individually controlled to open and close. This invention can effectively pre-catalyze NVOCs, preventing NOx exceedances at the RTO outlet. The inlet and exhaust pipes are concentrated on one side of the gas chamber, resulting in a compact layout, small footprint, and convenient maintenance. Pre-catalysis fully utilizes exhaust waste heat, eliminating the need for additional heating devices and reducing operating costs.

Description

Technical Field

[0001] This invention belongs to the field of organic waste gas treatment, and relates to a regenerative thermal oxidizer, and more particularly to a high-efficiency and low-consumption NVOCs catalytic reduction process and equipment embedded in an RTO. Background Technology

[0002] Nitrogen-containing volatile organic compounds (NVOCs) are a common type of VOCs. Due to their nitrogen content, they are frequently identified as volatile odorous organic compounds (MVOCs). Furthermore, the disposal of NVOCs easily generates secondary pollutants, making their effective treatment a key concern. The most common NVOCs originate from dimethylacetamide (DMAC), dimethylformamide (DMF), and N,N-dimethylpyrrolidone (NMP), among others. These nitrogen-containing organic compounds are widely used in industries such as insulating film materials, semiconductors, leather processing, and lithium batteries.

[0003] Regenerative Thermal Oxidizers (RTOs) are currently recognized as the most efficient VOCs treatment technology and are gradually becoming the mainstream process. However, when NVOCs are completely oxidized and decomposed in the high-temperature (>750℃) environment of the furnace, nitrogen (N) is converted into NOx, which can easily cause NOx levels in the exhaust gas to exceed the standard. Furthermore, when the concentration of NVOCs in VOCs is high, such as when the DMAC concentration reaches 100 ppm, 100 ppm (corresponding to a mass concentration of approximately 200 mg / m³) will be generated after combustion in the RTO. 3 The NOx concentration exceeded the limit specified in the "Integrated Emission Standard for Air Pollutants" (DB32 / 4041-2021). NVOCs at 100 ppm are commonly found in VOCs emitted by industries such as insulating film materials, semiconductors, leather processing, and lithium batteries. Currently, the common practice is to add a selective catalytic converter (SCR) at the end of the RTO to remove NOx; however, the investment and operating costs are generally prohibitive for companies, and the overall treatment system is extremely large. Summary of the Invention

[0004] This invention provides a highly efficient and low-consumption NVOCs catalytic reduction process and equipment embedded in an RTO, to overcome the shortcomings of the prior art.

[0005] To achieve the above objectives, the present invention provides a regenerative combustion device with embedded NVOCs catalytic reduction, comprising a combustion chamber and several regenerative chambers disposed below and connected to the combustion chamber; characterized by the following features: it further includes an integrated pipeline; the integrated pipeline comprises three horizontally integrated pipelines: upper, middle, and lower; of the upper and lower pipelines, one is an intake pipeline and the other is an exhaust pipeline; the middle pipeline is a central gas chamber inlet / outlet connecting pipeline; the central gas chamber inlet / outlet connecting pipeline contains an NVOCs catalyst; the NVOCs catalyst is a catalyst that, under heating conditions, uses C and H in NVOCs as reducing agents to catalytically reduce N to N2; the central gas chamber inlet / outlet connecting pipeline is divided into several sub-inlet / outlet connecting pipelines by several partitions; the number of sub-inlet / outlet connecting pipelines is equal to the number of regenerative chambers and corresponds one-to-one, and the sub-inlet / outlet connecting pipelines are connected to the corresponding regenerative chambers; each sub-inlet / outlet connecting pipeline has two vents, which are connected to the upper and lower pipelines respectively; each vent can be individually controlled to open and close.

[0006] Furthermore, the present invention provides a regenerative combustion device with embedded NVOCs catalytic reduction, which may also have the following features: it further includes a high-temperature flue gas mixing box; the high-temperature flue gas mixing box is connected to the combustion chamber; the high-temperature flue gas mixing box is also connected to the exhaust pipe of the integrated pipe through a high-temperature flue gas heat exchange pipe.

[0007] Furthermore, the present invention provides a regenerative incinerator with embedded NVOCs catalytic reduction, which may also have the following features: it further includes an exhaust stack; the exhaust pipe of the integrated pipeline is connected to the exhaust stack; the high-temperature flue gas mixing box is also connected to the exhaust stack through a high-temperature flue gas direct discharge pipe; and both the high-temperature flue gas heat exchange pipe and the high-temperature flue gas direct discharge pipe are equipped with proportional regulating valves.

[0008] Furthermore, the present invention provides a regenerative combustion device with embedded NVOCs catalytic reduction, which may also have the following features: wherein the NVOCs catalyst is filled to half the space of the central gas chamber inlet and outlet connecting pipe, and is located on one side adjacent to the exhaust pipe.

[0009] Furthermore, the present invention provides a regenerative incineration device with embedded NVOCs catalytic reduction, which may also have the following feature: wherein, each of the two vents of the sub-inlet and outlet connecting pipe is provided with a lift valve to control the opening and closing of the two vents respectively.

[0010] Furthermore, the present invention provides a regenerative thermal incinerator with embedded NVOCs catalytic reduction, which may also have the following features: wherein, of the two lifting valves in the sub-inlet / outlet connecting pipe, the lifting valve at the upper vent is an upward lifting valve, and the lifting valve at the lower vent is a downward lifting valve; the valve port and valve plate of the upward lifting valve are both located in the upper part of the integrated pipe; when the valve plate moves upward away from the valve port, the vent opens, and when the valve plate moves downward to cover the valve port, the vent closes; the valve port and valve plate of the downward lifting valve are both located in the lower part of the integrated pipe; when the valve plate is pushed downward away from the valve port, the vent opens, and when the valve plate moves upward to cover the valve port, the vent closes; the valve bodies of both the upward and downward lifting valves are installed above the integrated pipe.

[0011] Furthermore, the present invention provides a regenerative incineration device with embedded NVOCs catalytic reduction, which may also have the following feature: wherein the integrated pipeline is provided with a plurality of lifting valve group maintenance ports, corresponding to a set of upward lifting valves and downward lifting valves of each sub-inlet / outlet connecting pipeline.

[0012] Furthermore, the present invention provides a regenerative combustion device with embedded NVOCs catalytic reduction, which may also have the following feature: wherein, of the two pipes at the upper and lower parts of the integrated pipe, the upper pipe is an intake pipe and the lower pipe is an exhaust pipe.

[0013] Furthermore, the present invention provides a regenerative incineration device with embedded NVOCs catalytic reduction, which may also have the following feature: wherein the central gas chamber inlet and outlet connecting pipe is provided with a grid, and the NVOCs catalyst is filled on the grid.

[0014] The present invention also provides a process for the above-mentioned regenerative incineration device with embedded NVOCs catalytic reduction, which has the following characteristics: nitrogen-containing volatile organic compound waste gas first undergoes an oxidation-reduction reaction with the NVOCs catalyst, and then enters the combustion chamber for combustion; in the oxidation-reduction reaction between the nitrogen-containing volatile organic compound waste gas and the NVOCs catalyst, C and H in the nitrogen-containing volatile organic compound waste gas undergo an oxidation reaction, and N is catalytically reduced to N2.

[0015] The beneficial effects of this invention are as follows: This invention provides a high-efficiency, low-consumption NVOCs catalytic reduction process and equipment embedded in an RTO, which can effectively pre-catalyze NVOCs and avoid excessive NOx emissions at the RTO outlet; the intake and exhaust pipes are concentrated on one side of the gas chamber, stacked vertically, resulting in a compact equipment layout with a small footprint, facilitating inspection and maintenance; pre-catalysis fully utilizes exhaust waste heat, eliminating the need for additional heating devices and reducing operating costs. Specifically:

[0016] I. When the concentration of NVOCs in VOCs is high, such as when the DMAC concentration reaches 100 ppm, it will produce 100 ppm (corresponding to a mass concentration of approximately 200 mg / m³) after RTO combustion. 3 The NOx concentration exceeded the limit specified in the "Integrated Emission Standard of Air Pollutants" (DB32 / 4041-2021), and NVOCs at 100 ppm are commonly found in VOCs emitted by industries such as insulating film materials, semiconductors, leather making, and lithium batteries. This invention, through pre-catalysis of nitrogen-containing organic compounds, utilizes the C and H atoms in the NVOCs as reducing agents under heating conditions to catalytically reduce N to N2, thereby avoiding NOx pollution.

[0017] Second, compared to conventional multi-chamber RTOs, this invention concentrates the intake and exhaust pipes on one side of the gas chamber, stacking them vertically, and uses a central gas chamber inlet / outlet connecting pipe as a transition pipe. This solves the problems of conventional multi-chamber RTOs where intake and exhaust pipes are distributed on both sides of the gas chamber, resulting in an insufficiently compact RTO layout, large footprint, and inconvenient maintenance.

[0018] 3. The intake and exhaust pipes are separated by a central gas chamber inlet / outlet connecting pipe. The central gas chamber inlet / outlet connecting pipe is preheated by RTO exhaust gas at a certain temperature and high-temperature furnace flue gas, maintaining the NVOCs catalyst within the central gas chamber at a suitable temperature. This allows the C, H, and O of the NVOCs in the intake air to be oxidized into carbon dioxide and water, and N reduced to nitrogen. Heat exchange is achieved through a large-area pipe, fully utilizing exhaust waste heat. No additional heat exchanger is required, and no additional heat source is needed to heat the NVOCs catalyst. Operation is simple, and investment and operating costs are low.

[0019] IV. The intake and exhaust pipes are each equipped with lift valves of different strokes. Each regenerator chamber corresponds to a valve assembly consisting of one downward lift valve and one upward lift valve. These valve assemblies serve as channels connecting the intake pipe, the central gas chamber inlet / outlet connecting pipe, and the exhaust pipe. The entire valve control system is located on the RTO side, resulting in a low failure rate and facilitating inspection and maintenance. Attached Figure Description

[0020] Figure 1 This is a front view of a regenerative thermal incinerator with embedded NVOCs catalytic reduction.

[0021] Figure 2 This is a top view of a regenerative thermal incinerator with embedded NVOCs catalytic reduction.

[0022] Figure 3 This is a side view of a regenerative thermal incinerator with embedded NVOCs catalytic reduction.

[0023] Figure 4 This is the main view of the integrated pipeline;

[0024] Figure 5 This is a top view of the integrated piping system;

[0025] Figure 6 This is a cross-sectional view of the integrated piping system;

[0026] Figure 7 This is a top view of the valve port and valve plate of the lift valve;

[0027] Figure 8 These are schematic diagrams showing the opening and closing of the upward lifting valve and the downward lifting valve, where a is a schematic diagram of the upward lifting valve in the closed state, b is a schematic diagram of the upward lifting valve in the open state, c is a schematic diagram of the downward lifting valve in the closed state, and d is a schematic diagram of the downward lifting valve in the open state. Detailed Implementation

[0028] The specific embodiments of the present invention will be described below with reference to the accompanying drawings.

[0029] like Figure 1-3 As shown, the present invention provides a regenerative combustion device with embedded NVOCs catalytic reduction, including a combustion chamber 1, several regenerative chambers 2, an integrated pipe 3, and an exhaust stack 4.

[0030] Several heat storage chambers 2 are located below the combustion chamber 1 and are connected to the combustion chamber 1.

[0031] like Figure 1-6 As shown, the integrated pipeline 3 includes three horizontally integrated pipelines: an upper, a middle, and a lower one. Of the upper and lower pipelines, the upper one is an exhaust pipeline 32, and the lower one is an intake pipeline 31. The exhaust pipeline 32 is connected to the exhaust stack 4. The middle pipeline is a connecting pipeline 33 for the middle air chamber.

[0032] The central gas chamber inlet / outlet connecting pipe 33 contains an NVOCs catalyst. The NVOCs catalyst, under heating conditions, utilizes the C and H atoms in NVOCs as reducing agents to catalytically reduce N to N2. NVOCs catalysts are existing technologies; for example, they could be the "Catalyst for Selective Reduction of Nitrogen-Containing Organic Compounds through Catalytic Combustion" disclosed in application number 2023109093388, or NVOC-1 from Jinhua Platinum Catalysis Technology Co., Ltd. Specifically, the central gas chamber inlet / outlet connecting pipe 33 is equipped with a grid, and the NVOCs catalyst is loaded onto the grid. The loading amount of the NVOCs catalyst can be adjusted by the height of the central gas chamber inlet / outlet connecting pipe 33 and the grid.

[0033] The central gas chamber inlet / outlet connecting pipe 33 is divided into several sub-inlet / outlet connecting pipes 332 by several partitions 331. The number of sub-inlet / outlet connecting pipes 332 is equal to the number of heat storage chambers 2 and corresponds one-to-one. Each sub-inlet / outlet connecting pipe 332 is connected to its corresponding heat storage chamber 2. Each sub-inlet / outlet connecting pipe 332 has two vents, which are connected to the upper and lower pipes respectively. Each vent can be controlled to open and close independently. When the vent of one sub-inlet / outlet connecting pipe 332 connected to the intake pipe 31 is opened, the vent of another sub-inlet / outlet connecting pipe 332 connected to the exhaust pipe 32 is opened, and the remaining vents are closed, the exhaust gas can be used for intake-combustion-exhaust processes in two different heat storage chambers 2. The gas discharged into the exhaust pipe 32 can heat the central gas chamber inlet / outlet connecting pipe 33 to achieve the catalytic reduction of N by the NVOCs catalyst.

[0034] In a preferred embodiment, the NVOCs catalyst is filled to half the space of the central gas chamber inlet / outlet connecting pipe and is located on one side adjacent to the exhaust pipe to achieve sufficient heat exchange. That is, in this embodiment, the NVOCs catalyst can be filled only in the upper half of the central gas chamber inlet / outlet connecting pipe 33.

[0035] In a preferred embodiment, such as Figure 4-8 As shown, each of the two vent ports of the sub-inlet / outlet connecting pipe 332 is equipped with a lift valve to control the opening and closing of the two vent ports respectively. Specifically, of the two lift valves in the sub-inlet / outlet connecting pipe 332, the lift valve for the upper vent is an upward lift valve 341, and the lift valve for the lower vent is a downward lift valve 342. The valve port and valve plate of the upward lift valve 341 are both located in the upper part of the integrated pipe 3. When the valve plate of the upward lift valve 341 moves away from the valve port, the vent port opens; when the valve plate moves downward to cover the valve port, the vent port closes. The valve port and valve plate of the downward lift valve 342 are both located in the lower part of the integrated pipe 3. When the valve plate is pushed downward to move away from the valve port, the vent port opens; when the valve plate of the upward lift valve 341 covers the valve port, the vent port closes. By setting the upward lift valve 341 and the downward lift valve 342 respectively, the independent opening and closing of the two vent ports can be achieved smoothly without affecting the setting of the NVOCs catalyst in the middle gas chamber inlet / outlet connecting pipe 33.

[0036] The valve bodies of both the upward lifting valve 341 and the downward lifting valve 342 are installed above the integrated pipe 3.

[0037] The integrated pipeline 3 is provided with several lifting valve group inspection ports 35, which correspond to the positions of a set of upward lifting valves 341 and downward lifting valves 342 of each sub-inlet / outlet connecting pipeline 332, so as to facilitate their maintenance.

[0038] In another preferred embodiment, the upper part of the integrated pipe 3 is an intake pipe, and the lower part is an exhaust pipe. The high-temperature flue gas located below is more likely to heat the middle gas chamber inlet-outlet connecting pipe above it. Furthermore, the NVOCs catalyst can be filled only in the lower half of the middle gas chamber inlet-outlet connecting pipe.

[0039] In a preferred embodiment, a high-temperature flue gas mixing chamber 5 is also included. The high-temperature flue gas mixing chamber 5 is connected to the combustion chamber 1 via a pipe. The high-temperature flue gas mixing chamber 5 is also connected to the exhaust pipe 32 of the integrated pipe 3 via a high-temperature flue gas heat exchange pipe 51, that is, the high-temperature flue gas after combustion in the combustion chamber 1 is introduced into the exhaust pipe 32 to heat the central gas chamber inlet / outlet connecting pipe 33. The high-temperature flue gas mixing chamber 5 is also connected to the exhaust stack 4 via a high-temperature flue gas direct discharge pipe 52. Both the high-temperature flue gas heat exchange pipe 51 and the high-temperature flue gas direct discharge pipe 52 are equipped with proportional regulating valves to precisely control the flow rates of the directly discharged high-temperature flue gas and the high-temperature flue gas used for heat exchange, thereby precisely controlling the catalytic temperature and the temperature of the combustion chamber 1.

[0040] In addition, the high-temperature flue gas mixing box 5 can also be connected to other heat exchange equipment, where the high-temperature flue gas undergoes heat exchange before flowing into the high-temperature flue gas heat exchange pipe 51 and / or the high-temperature flue gas direct discharge pipe 52, for example, when the inlet concentration of the exhaust gas is higher than 3000 mg / m³. 3 At this time, the high-temperature flue gas after combustion can be cooled by heat exchange first, and then heated to NVOCs catalyst and / or discharged directly.

[0041] The above-mentioned NVOCs precatalytic device (including the central gas chamber inlet / outlet connecting pipe 33, NVOCs catalyst, exhaust pipe 32, high-temperature flue gas heat exchange pipe 51, etc.) is integrated with the RTO inlet and exhaust pipes 32 and the corresponding valve group. The inlet pipe 31, the central gas chamber inlet / outlet connecting pipe 33, and the exhaust pipe 32 are all independent channels. Among them, the inlet pipe 31 and the exhaust pipe 32 are continuous pipes, while the central gas chamber inlet / outlet connecting pipe 33 is not continuous. It is divided into several areas (i.e., sub-inlet / outlet connecting pipes 332) by a partition, which correspond to the lower gas chambers of several heat storage chambers 2 of the RTO. When the downward lifting valve 342 corresponding to the RTO heat storage chamber 2 opens downward, the inlet pipe 31 and the central gas chamber inlet / outlet connecting pipe 33 are connected, and the exhaust gas enters the corresponding RTO heat storage chamber 2 through the inlet pipe 31 and the corresponding central gas chamber inlet / outlet connecting pipe 33. When the upward lifting valve 341 corresponding to the RTO regenerator 2 opens upward, the central gas chamber inlet / outlet connecting pipe 33 connects to the exhaust pipe 32, and the RTO combustion exhaust gas enters the exhaust stack 4 through the exhaust pipe 32. Each RTO regenerator 2 corresponds to a set of valve groups, consisting of a downward lifting valve 342 and an upward lifting valve 341 with different strokes. The two lifting valves in the same set of valves do not open simultaneously, and the valve opening state is consistent with the RTO operating state. Among them, the downward lifting valve 342 is connected to the intake pipe 31, and the upward lifting valve 341 is connected to the exhaust pipe 32. The positions of the intake and exhaust pipes 32 and the valve positions can be adjusted according to the actual situation.

[0042] The process of the regenerative thermal oxidizer (RTO) with embedded NVOCs catalytic reduction in this invention is as follows: Nitrogen-containing volatile organic compound (VOC) waste gas first undergoes an oxidation-reduction reaction with an NVOCs catalyst, and then enters the combustion chamber for combustion. During the oxidation-reduction reaction between the nitrogen-containing VOCs waste gas and the NVOCs catalyst, C and H in the nitrogen-containing VOCs waste gas undergo oxidation, and N is catalytically reduced to N2. Specifically, the waste gas undergoes pretreatment (filtration or washing to remove particulate matter or acid / alkali waste gas), followed by pre-catalytic treatment, and then enters the RTO for further treatment before being discharged. Specifically, the exhaust gas first enters the bottom intake pipe 31. For example, the downward lifting valve 342 of the sub-inlet / outlet connecting pipe 332 corresponding to RTO1# heat storage chamber 2 opens downward, and the upward lifting valve 341 of the sub-inlet / outlet connecting pipe 332 corresponding to RTO2# heat storage chamber 2 opens upward. The exhaust gas enters the middle gas chamber inlet / outlet connecting pipe 33 through the opened downward lifting valve 342. The middle gas chamber inlet / outlet connecting pipe 33 is connected to the bottom gas chamber of RTO1# heat storage chamber 2. After the exhaust gas enters RTO1# heat storage chamber 2 through the gas chamber, it continues to heat up. When it reaches the combustion chamber 1, the temperature can reach over 760℃. After the VOCs are completely oxidized and decomposed at high temperature, it enters RTO2# heat storage chamber 2 to recover heat and then enters the middle gas chamber inlet / outlet connecting pipe 33, and is then discharged through the exhaust pipe 32. The middle gas chamber inlet / outlet connecting pipe 33 is equipped with an NVOCs catalyst, and the temperature of this pipe section is controlled within the appropriate operating temperature range of the NVOCs catalyst. Temperature is mainly controlled in two ways: (1) The exhaust pipe 32 is adjacent to the central gas chamber inlet and outlet connecting pipe 33. The exhaust temperature is generally above 100℃, which can heat the central gas chamber inlet and outlet connecting pipe 33 and the NVOCs catalyst inside. (2) The RTO takes heat from the combustion chamber 1 to the high-temperature flue gas mixing box 5. The high-temperature flue gas outlet is divided into a high-temperature flue gas direct discharge pipe 52 and a high-temperature flue gas heat exchange pipe 51. The high-temperature gas in the high-temperature flue gas heat exchange pipe 51 can directly heat the central gas chamber inlet and outlet connecting pipe 33 and the NVOCs catalyst inside, so that it reaches the working temperature. The proportional regulating valves set on the high-temperature flue gas direct discharge pipe 52 and the high-temperature flue gas heat exchange pipe 51 can accurately control the temperature. When the organic matter concentration is high, the high-temperature flue gas mixing box 5 can fully recover heat for production. At the same time, the outlet high-temperature flue gas direct discharge pipe 52 can also ensure that the temperature in the RTO combustion chamber 1 does not exceed the limit.

[0043] Of course, it is also possible to omit the high-temperature flue gas mixing box 5 and the matching high-temperature flue gas heat exchange pipe 51 and high-temperature flue gas direct discharge pipe 52. That is, the RTO reduces the amount of heat storage material and increases the exhaust temperature. It only heats the middle gas chamber inlet and outlet connecting pipe 33 through the gas in the exhaust pipe 32 of the integrated pipe 3, so as to ensure that the NVOCs catalyst can catalytically reduce N to N2.

[0044] In one specific embodiment, the NVOC-1 catalyst purchased from Jinhua Platinum Catalysis Technology Co., Ltd. was used to treat dimethylacetamide (DMA) to test the performance of the device.

[0045] The substance being treated is an industrial product (dimethylacetamide), with a pre-reaction concentration of 1000 mg / m³. 3 Airspeed is 20,000 h -1 The test conditions and test results are shown in Table 1.

[0046] Table 1

[0047]

[0048] The catalyst can catalytically reduce N in NVOCs to N2 at a relatively low operating temperature, such as 150°C. The operating temperature should not be too high. When it exceeds 300°C, the N2 selectivity decreases and the NOx concentration increases significantly after catalysis.

[0049] In this invention, unless otherwise stated, scientific and technical terms used herein have the meanings commonly understood by those skilled in the art.

[0050] It should be noted that the terms such as "upper", "lower", "left", "right", "front", and "back" used in the invention are only for clarity of description and are not intended to limit the scope of the invention. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of the invention.

[0051] Finally, it should be noted that the above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A regenerative thermal ignition device, comprising a combustion chamber and a plurality of regenerative chambers disposed below and in communication with the combustion chamber, characterized in that: It also includes integrated piping; The integrated pipeline includes three horizontally integrated pipelines: upper, middle, and lower. Of the two pipes, one is the intake pipe and the other is the exhaust pipe. The central pipe is the connecting pipe for the central gas chamber. The central gas chamber inlet and outlet connecting pipes are equipped with NVOCs catalysts; NVOCs catalysts are catalysts that utilize the reducing properties of C and H in organic matter to catalytically reduce N to N2; The central gas chamber inlet and outlet connecting pipes are divided into several sub-inlet and outlet connecting pipes by several partitions; the number of sub-inlet and outlet connecting pipes is equal to the number of heat storage chambers and corresponds one-to-one, and the sub-inlet and outlet connecting pipes are connected to the corresponding heat storage chambers. Each sub-inlet / outlet connecting pipe is equipped with two vents, which are connected to the upper and lower pipes respectively; each vent can be controlled to open and close independently. Each of the two vent ports of the sub-inlet / outlet connecting pipe is equipped with a lift valve to control the opening and closing of the two vent ports respectively; Of the two lifting valves in the sub-inlet / outlet connecting pipe, the lifting valve at the upper vent is an upward lifting valve, and the lifting valve at the lower vent is a downward lifting valve. The valve port and valve plate of the upward lifting valve are both located in the upper part of the integrated pipe. When the valve plate is lifted upward and moves away from the valve port, the upper vent opens; when the valve plate is moved downward and covers the valve port, the upper vent closes. The valve port and valve plate of the downward lifting valve are both located in the lower part of the integrated pipe. When the valve plate is pushed downward and moves away from the valve port, the lower vent opens; when the valve plate is lifted upward and covers the valve port, the lower vent closes. The valve bodies of both the upward and downward lifting valves are installed above the integrated pipe.

2. The regenerative thermal ignition device according to claim 1, characterized in that: It also includes a high-temperature flue gas mixing chamber; The high-temperature flue gas mixing box is connected to the combustion chamber; The high-temperature flue gas mixing box is also connected to the exhaust pipe of the integrated pipeline through a high-temperature flue gas heat exchange pipe.

3. The regenerative thermal ignition device according to claim 2, characterized in that: It also includes exhaust pipes; The exhaust pipe of the integrated pipeline is connected to the exhaust stack; The high-temperature flue gas mixing box is also connected to the exhaust stack through a high-temperature flue gas direct discharge pipe; Both the high-temperature flue gas heat exchange pipe and the high-temperature flue gas direct discharge pipe are equipped with proportional regulating valves.

4. The regenerative thermal ignition device according to claim 1, characterized in that: in, The NVOCs catalyst is filled to half the space of the central gas compartment inlet and outlet connecting pipe, and is located on one side adjacent to the exhaust pipe.

5. The regenerative thermal ignition device according to claim 1, characterized in that: in, The integrated pipeline is equipped with several inspection ports for lifting valve groups, which correspond to a set of upward lifting valves and downward lifting valves for each sub-inlet / outlet connecting pipeline.

6. The regenerative thermal ignition device according to claim 1, characterized in that: in, Of the two pipes at the top and bottom of the integrated pipeline, the upper pipe is the air intake pipe and the lower pipe is the exhaust pipe.

7. The regenerative thermal ignition device according to claim 1, characterized in that: in, The central gas chamber inlet and outlet connecting pipe is equipped with a grid, and the NVOCs catalyst is filled on the grid.

8. A catalytic reduction process for NVOCs, characterized in that: The process uses a regenerative thermal incineration device as described in any one of claims 1-7; Nitrogen-containing volatile organic compound (NVOC) waste gas first undergoes an oxidation-reduction reaction with the NVOCs catalyst, and then enters the combustion chamber for combustion; In the oxidation-reduction reaction between nitrogen-containing volatile organic compound (NVOC) waste gas and NVOCs catalyst, C and H in the nitrogen-containing NVOC waste gas undergo oxidation, while N is catalytically reduced to N2.

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