Efficient and low-consumption nvocs catalytic reduction process and apparatus embedded in rto

Abstract

The present invention relates to the field of organic waste gas treatment. Disclosed are an efficient and low-consumption NVOCs catalytic reduction process and apparatus embedded in an RTO. The apparatus comprises a combustion chamber, a plurality of regenerative chambers, and an integrated pipe; among the two pipes at the upper part and the lower part of the integrated pipe, one is an inlet pipe and the other is an exhaust pipe; the pipe at the middle part of the integrated pipe is a middle gas chamber inlet / outlet connection pipe; the middle gas chamber inlet / outlet connection pipe is filled with an NVOCs catalyst; the middle gas chamber inlet / outlet connection pipe is divided into a plurality of sub inlet / outlet connection pipes by means of a plurality of partition plates, and the sub inlet / outlet connection pipes are communicated with the regenerative chambers in a one-to-one correspondence mode; each sub inlet / outlet connection pipe is provided with two air vents which are respectively communicated with the pipes at the upper part and the lower part; and each air vent is independently controlled to be opened and closed. According to the apparatus of the present invention, NVOCs can be effectively pre-catalyzed, preventing NOx at the outlet of the RTO from exceeding the standard; the inlet pipe and the exhaust pipe are concentrated on one side of the gas chamber, so that the apparatus features a compact layout and a small footprint, and facilitates inspection and maintenance; and waste heat from exhaust gas is fully utilized for pre-catalysis, eliminating the need for an additional heating device, lowering the operation cost.

Description

A high-efficiency and low-consumption NVOCs catalytic reduction process and equipment embedded in RTO Technical Field

[0001] The present invention belongs to the field of organic waste gas treatment, relates to a regenerative thermal incineration device, and in particular to a high-efficiency and low-consumption NVOCs catalytic reduction process and equipment embedded in RTO. Background Art

[0002] Nitrogen-containing volatile organic compounds (NVOCs) are a common type of VOC. Due to their nitrogen content, they are also common volatile odorous organic compounds (MVOCs). Furthermore, NVOC disposal can easily generate secondary pollutants, making effective NVOC management a key concern. The most common NVOCs are derived from dimethylacetamide (DMAC), dimethylformamide (DMF), and N,N-dimethylpyrrolidone (NMP). These nitrogen-containing organic compounds are widely used in the insulating film material industry, semiconductor industry, leather industry, and lithium battery industry.

[0003] Regenerative Thermal Oxidation (RTO) is currently recognized as the most efficient VOCs treatment technology and has gradually become the mainstream process. However, when NVOCs are completely oxidized and decomposed in the high temperature (>750℃) environment in the furnace, the nitrogen element will be converted into NOx, which can easily cause the NOx content in the exhaust gas to exceed the standard. At the same time, when the NVOCs concentration in VOCs is high, such as when the DMAC concentration reaches 100ppm, after RTO combustion, 100ppm (corresponding to a mass concentration of about 200mg / m 3 ) exceeds the limit concentration specified in the "Integrated Emission Standard of Air Pollutants" (DB32 / 4041-2021). NVOCs at 100 ppm are common in VOCs emitted by industries such as insulating film materials, semiconductors, leather, and lithium batteries. Currently, the common practice is to add an SCR at the end of the RTO to remove NOx. However, the investment and operating costs are generally unaffordable for companies, and the overall treatment system is extremely large. Summary of the Invention

[0004] The present invention provides a high-efficiency and low-consumption NVOCs catalytic reduction process and equipment embedded in RTO to overcome the defects of the prior art.

[0005] To achieve the above-mentioned objectives, the present invention provides a regenerative incineration device with built-in NVOCs catalytic reduction, comprising a combustion chamber and a plurality of regenerative chambers arranged below the combustion chamber and connected thereto; having the following characteristics: it also includes an integrated pipeline; the integrated pipeline includes three transversely integrated pipelines of upper, middle and lower parts; of the two pipelines in the upper and lower parts, one pipeline is an air intake pipeline and the other pipeline is an exhaust pipeline; the pipeline in the middle part is a middle gas bin inlet and outlet connecting pipeline; the middle gas bin inlet and outlet connecting pipeline is filled with NVOCs catalyst; the NVOCs catalyst is a catalyst that uses C and H in NVOCs as reducing agents to catalytically reduce N2 under heating conditions; the middle gas bin inlet and outlet connecting pipeline is divided into a plurality of sub-inlet and outlet connecting pipelines by a plurality of partitions; the number of the sub-inlet and outlet connecting pipelines is equal to the number of regenerative chambers and corresponds one to one, and the sub-inlet and outlet connecting pipelines are connected to the corresponding regenerative chambers; each sub-inlet and outlet connecting pipeline is provided with two vents, which are respectively connected to the upper and lower pipelines; each vent can be individually controlled to open and close.

[0006] Furthermore, the present invention provides a regenerative incineration device with embedded NVOCs catalytic reduction, which may also have the following characteristics: it also 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 thermal storage incineration device with embedded NVOCs catalytic reduction, which may also have the following characteristics: it also includes an exhaust chimney; the exhaust pipe of the integrated pipeline is connected to the exhaust chimney; the high-temperature flue gas mixing box is also connected to the exhaust chimney through a high-temperature flue gas direct exhaust pipe; the high-temperature flue gas heat exchange pipe and the high-temperature flue gas direct exhaust pipe are both provided with a proportional regulating valve.

[0008] Furthermore, the present invention provides a thermal storage incineration device with built-in NVOCs catalytic reduction, which may also have the following characteristics: wherein the filling amount of the NVOCs catalyst is half of the space of the inlet and outlet connecting pipe of the middle gas chamber, and is located on the side adjacent to the exhaust pipe.

[0009] Furthermore, the present invention provides a thermal storage incineration device with built-in NVOCs catalytic reduction, which may also have the following characteristics: wherein, lift valves are provided on the two air vents of the sub-inlet and outlet connecting pipes to control the opening and closing of the two air vents respectively.

[0010] Furthermore, the present invention provides a thermal storage incineration device with built-in NVOCs catalytic reduction, which may also have the following characteristics: among the two lifting valves of the sub-inlet and outlet connecting pipes, the lifting valve of the upper air vent is an upward lifting valve, and the lifting valve of the lower air vent is a downward lifting valve; the valve port and valve plate of the upward lifting valve are both arranged in the pipe at the upper part of the integrated pipe; when the valve plate is lifted upward and leaves the valve port, the air vent opens, and when the valve plate is moved downward to cover the valve port, the air vent closes; the valve port and valve plate of the downward lifting valve are both arranged in the pipe at the lower part of the integrated pipe; when the valve plate is pushed downward and leaves the valve port, the air vent opens, and when the valve plate is lifted upward and covers the valve port, the air vent closes; the valve bodies of the upward lifting valve and the downward lifting valve are both installed above the integrated pipe.

[0011] Furthermore, the present invention provides a thermal storage incineration device with built-in NVOCs catalytic reduction, which may also have the following characteristics: wherein, the integrated pipeline is provided with a plurality of lift valve group inspection ports, corresponding to a group of upward lift valves and downward lift valves of each sub-inlet and outlet connecting pipeline.

[0012] Furthermore, the present invention provides a thermal storage incineration device with embedded NVOCs catalytic reduction, which may also have the following characteristics: among the two pipes at the upper and lower parts of the integrated pipeline, the upper pipe is an air intake pipe and the lower pipe is an exhaust pipe.

[0013] Furthermore, the present invention provides a regenerative incineration device with built-in NVOCs catalytic reduction, which may also have the following characteristics: wherein, a grid is provided in the inlet and outlet connecting pipes of the central gas bin, and the NVOCs catalyst is loaded on the grid.

[0014] The present invention also provides a process for the above-mentioned regenerative incineration device with built-in 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; during 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 the present invention are as follows: the present invention provides a high-efficiency, low-consumption NVOCs catalytic reduction process and equipment embedded in the RTO, which can effectively pre-catalyze NVOCs and prevent NOx from exceeding the standard at the RTO outlet; the air intake and exhaust pipes are concentrated on one side of the gas bin and stacked up and down, resulting in a compact equipment layout with a small footprint and convenient inspection and maintenance; the pre-catalysis fully utilizes the exhaust waste heat, eliminating the need for additional heating devices and reducing operating costs. Specifically:

[0016] 1. When the concentration of NVOCs in VOCs is high, such as when the concentration of DMAC reaches 100ppm, after RTO combustion, 100ppm (corresponding to a mass concentration of about 200mg / m 3 ) exceeds the limit concentration specified in the "Integrated Emission Standard of Air Pollutants" (DB32 / 4041-2021). NVOCs at 100 ppm are common in VOCs emitted by industries such as insulating film materials, semiconductors, leather, and lithium batteries. The present invention pre-catalyzes nitrogen-containing organic matter, allowing NVOCs to be catalytically reduced to N2 under heating conditions using the C and H in the NVOCs as reducing agents, thereby avoiding NOx pollution.

[0017] Second, compared to conventional multi-chamber RTOs, this invention concentrates the intake and exhaust ducts on one side of the gas chamber, stacking them one above the other, and uses the central gas chamber inlet and outlet connecting ducts connected to the RTO gas chamber as a transition duct. This solves the problem of conventional multi-chamber RTOs with intake and exhaust ducts distributed on both sides of the gas chamber, resulting in an inefficient RTO layout, large space requirements, and inconvenient inspection and maintenance.

[0018] Third, the intake and exhaust ducts are separated by a central gas chamber inlet and outlet connecting pipe. This pipe is preheated by the RTO exhaust at a certain temperature and the high-temperature furnace flue gas, maintaining the NVOCs catalyst in the pipe at a suitable temperature. This oxidizes the C, H, and O in the NVOCs in the intake air into carbon dioxide and water, and reduces the N to nitrogen. Heat exchange through the large-area pipe fully utilizes waste heat from the exhaust gas, eliminating the need for additional heat exchangers or consuming additional heat sources to heat the NVOCs catalyst. This results in simple operation and low investment and operating costs.

[0019] Fourth, poppet valves with different strokes are installed on the intake and exhaust pipes. Each regenerator corresponds to a valve block with one downward-lifting valve and one upward-lifting valve. The valve block serves as a channel connecting the intake pipe, the central air chamber inlet and outlet connecting pipes, and the exhaust pipe. The entire valve control system is located on the RTO side, which reduces the failure rate and facilitates inspection and maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] FIG1 is a front view of a regenerative thermal incineration device with built-in NVOCs catalytic reduction;

[0021] FIG2 is a top view of a regenerative thermal incineration device with built-in NVOCs catalytic reduction;

[0022] FIG3 is a side view of a regenerative thermal incineration device with built-in NVOCs catalytic reduction;

[0023] FIG4 is a front view of the integrated pipeline;

[0024] FIG5 is a top view of the integrated pipeline;

[0025] FIG6 is a cross-sectional view of the integrated pipeline;

[0026] FIG7 is a schematic top view of the valve port and valve plate of the poppet valve;

[0027] Figure 8 is a schematic diagram of the opening and closing of the upward lifting valve and the downward lifting valve, where a is a schematic diagram of the closed state of the upward lifting valve, b is a schematic diagram of the open state of the upward lifting valve, c is a schematic diagram of the closed state of the downward lifting valve, and d is a schematic diagram of the open state of the downward lifting valve. DETAILED DESCRIPTION

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

[0029] As shown in Figures 1-3, the present invention provides a regenerative incineration device with built-in NVOCs catalytic reduction, including a combustion chamber 1, a plurality of regenerative chambers 2, an integrated pipeline 3 and an exhaust pipe 4.

[0030] A plurality of heat storage chambers 2 are arranged below the combustion chamber 1 and communicated with the combustion chamber 1 .

[0031] As shown in Figures 1-6, the integrated duct 3 comprises three transversely integrated ducts: upper, middle, and lower. The upper duct serves as the exhaust duct 32, while the lower duct serves as the intake duct 31. Exhaust duct 32 communicates with exhaust pipe 4. The middle duct serves as the inlet and outlet connection duct 33 for the central air chamber.

[0032] The middle gas storage inlet and outlet connecting pipe 33 is filled with NVOCs catalyst. NVOCs catalyst is a catalyst that uses C and H in NVOCs as reducing agents to catalytically reduce N to N2 under heating conditions. NVOCs catalyst is a prior art, for example, it can be the "A Catalytic Combustion Selective Reduction Catalyst for Nitrogen-Containing Organic Matter" disclosed in the invention with application number 2023109093388, NVOC-1 of Jinhua Borui Catalytic Technology Co., Ltd., etc. Specifically, a grille is provided in the middle gas storage inlet and outlet connecting pipe 33, and the NVOCs catalyst is loaded on the grille. The loading amount of NVOCs catalyst can be adjusted by the height of the middle gas storage inlet and outlet connecting pipe 33 and the grille.

[0033] The middle gas storage inlet and outlet connecting pipe 33 is divided into several sub-inlet and outlet connecting pipes 332 by several partitions 331. The number of sub-inlet and outlet connecting pipes 332 is equal to the number of heat storage chambers 2 and corresponds one to one, and the sub-inlet and outlet connecting pipes 332 are connected to the corresponding heat storage chambers 2. Each sub-inlet and outlet connecting pipe 332 is provided with two vents, which are connected to the upper and lower pipes respectively. Each vent can be controlled to open and close individually. The vent of a certain sub-inlet and outlet connecting pipe 332 connected to the intake pipe 31 is opened, while the vent of another sub-inlet and outlet connecting pipe 332 connected to the exhaust pipe 32 is opened, and the remaining vents are closed, so that the intake-combustion-exhaust process of the exhaust gas in two different heat storage chambers 2 can be realized. The gas discharged into the exhaust pipe 32 can heat the middle gas storage inlet and outlet connecting pipe 33 to realize the catalytic reduction of N by the NVOCs catalyst.

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

[0035] In a preferred embodiment, as shown in Figures 4-8, both vents of the sub-inlet and outlet connecting pipe 332 are equipped with lift valves to control the opening and closing of the two vents. Specifically, 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 pipe of the integrated pipe 3. Lifting the valve plate of the upward lift valve 341 away from the valve port opens the vent; moving the valve plate downward to cover the valve port closes the vent. The valve port and valve plate of the downward lift valve 342 are both located in the lower pipe of the integrated pipe 3. Pushing the valve plate downward away from the valve port opens the vent, and lifting the valve plate of the upward lift valve 341 to cover the valve port closes the vent. By providing separate upward lift valves 341 and downward lift valves 342, the two vents can be opened and closed independently without affecting the NVOCs catalyst installed in the central gas tank inlet and outlet connecting pipe 33.

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

[0037] The integrated pipeline 3 is provided with a plurality of lift valve group inspection ports 35 corresponding to the positions of a group of upward lift valves 341 and downward lift valves 342 of each sub-inlet and outlet connecting pipeline 332, so as to facilitate its inspection.

[0038] In another preferred embodiment, the upper portion of the integrated duct 3 serves as the intake duct, while the lower portion serves as the exhaust duct. The high-temperature flue gas at the lower portion more easily heats the central gas silo inlet and outlet connecting duct above it. Furthermore, the NVOCs catalyst can be installed only in the lower half of the central gas silo inlet and outlet connecting duct.

[0039] In a preferred embodiment, a high-temperature flue gas mixing box 5 is also included. The high-temperature flue gas mixing box 5 is connected to the combustion chamber 1 through a pipe. The high-temperature flue gas mixing box 5 is also connected to the exhaust pipe 32 of the integrated pipe 3 through the 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 middle gas storage inlet and outlet connecting pipe 33. The high-temperature flue gas mixing box 5 is also connected to the exhaust pipe 4 through the high-temperature flue gas direct exhaust pipe 52. Proportional regulating valves are provided on the high-temperature flue gas heat exchange pipe 51 and the high-temperature flue gas direct exhaust pipe 52 to accurately control the flow rate of the directly discharged high-temperature flue gas and the high-temperature flue gas used for heat exchange, thereby accurately 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. The high-temperature flue gas is first heat exchanged 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 intake concentration of the exhaust gas is higher than 3000 mg / m 3 When the combustion process is complete, the high-temperature flue gas can be cooled by heat exchange first, and then used to heat the NVOCs catalyst and / or discharged directly.

[0041] The above NVOCs pre-catalytic device (including the middle gas storage inlet and outlet connecting pipe 33, NVOCs catalyst, exhaust pipe 32, high-temperature flue gas heat exchange pipe 51, etc.) is an integrated design with the RTO inlet and exhaust pipes 32 and the corresponding valve group. The air intake pipe 31, the middle gas storage inlet and outlet connecting pipe 33 and the exhaust pipe 32 are all independent channels, of which the air intake pipe 31 and the exhaust pipe 32 are through pipes, and the middle gas storage inlet and outlet connecting pipe 33 is not through, and is divided into several areas (i.e., sub-inlet and outlet connecting pipes 332) by partitions, which respectively correspond to the lower air storages of several heat storage chambers 2 of the RTO. When the downward lift valve 342 corresponding to the RTO heat storage chamber 2 is opened downward, the air intake pipe 31 and the middle gas storage inlet and outlet connecting pipe 33 are connected, and the exhaust gas enters the corresponding RTO heat storage chamber 2 from the air intake pipe 31 and the middle gas storage inlet and outlet connecting pipe 33 of the corresponding area. When the upward-lift valve 341 corresponding to the RTO regenerator 2 opens upward, the central gas chamber inlet and outlet connecting pipe 33 connects to the exhaust pipe 32, and the RTO combustion exhaust enters the exhaust pipe 4 through the exhaust pipe 32. Each RTO regenerator 2 corresponds to a valve group consisting of a downward-lift valve 342 and an upward-lift valve 341 with different strokes. The two valves in the same valve group are not opened at the same time, and the valve opening state is consistent with the RTO operating state. Specifically, the downward-lift valve 342 is connected to the intake pipe 31, and the upward-lift valve 341 is connected to the exhaust pipe 32. The position of the intake and exhaust pipes 32 and the valve positions can be adjusted according to actual conditions.

[0042] The process of the regenerative thermal incinerator with built-in NVOCs catalytic reduction is as follows: nitrogen-containing volatile organic compound (VOC) waste gas first undergoes a redox reaction with the NVOCs catalyst before entering the combustion chamber for combustion. During this redox reaction, the C and H in the nitrogen-containing VOC waste gas undergo an oxidation reaction, and the N is catalytically reduced to N2. The specific working process is as follows: the waste gas undergoes pretreatment (filtration or washing to remove particulate matter and acid-base waste gas), then undergoes pre-catalytic treatment, and then enters the RTO treatment before discharge. Specifically, the exhaust gas first enters the bottom air inlet pipe 31. For example, the downward lift valve 342 of the sub-inlet and outlet connecting pipe 332 corresponding to the RTO1# regenerator 2 is opened downward, and the upward lift valve 341 of the sub-inlet and outlet connecting pipe 332 corresponding to the RTO2# regenerator 2 is opened upward. The exhaust gas enters the middle gas storage inlet and outlet connecting pipe 33 through the opened downward lift valve 342. The middle gas storage inlet and outlet connecting pipe 33 is connected to the gas storage at the bottom of the RTO1# regenerator 2. After passing through the gas storage and entering the RTO1# regenerator 2, the exhaust gas continues to heat up. By the time it reaches the combustion chamber 1, the temperature can reach above 760°C. After completely oxidizing and decomposing VOCs at high temperature, the exhaust gas enters the RTO2# regenerator 2 to recover heat, enters the middle gas storage inlet and outlet connecting pipe 33, and is then discharged through the exhaust pipe 32. An NVOCs catalyst is installed in the middle gas storage inlet and outlet connecting pipe 33, and the temperature of this pipe section is controlled within the appropriate operating temperature range of the NVOCs catalyst. The temperature is mainly controlled in two ways: (1) The exhaust pipe 32 is adjacent to the middle gas bin inlet and outlet connecting pipe 33. The exhaust temperature is generally above 100°C, which can heat the middle gas bin inlet and outlet connecting pipe 33 and the internal NVOCs catalyst. (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 middle gas bin inlet and outlet connecting pipe 33 and the internal NVOCs catalyst to reach the working temperature. The proportional control 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 temperature.

[0043] Of course, 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 exhaust pipe 52 can also be omitted, that is, the RTO reduces the amount of heat storage body filling, increases the exhaust temperature, and only heats the middle gas tank inlet and outlet connecting pipe 33 through the gas in the exhaust pipe 32 of the integrated pipe 3 to ensure that the NVOCs catalyst can catalytically reduce N to N2.

[0044] In a specific embodiment, the performance of the device was tested by treating dimethylacetamide (DMA) with NVOC-1 catalyst purchased from Jinhua Borui Catalytic Technology Co., Ltd.

[0045] The treatment object is industrial product (dimethylacetamide), and the concentration before reaction is 1000mg / m 3 , airspeed is 20000h -1 , the test conditions and test results are shown in Table 1.

[0046] Table 1

[0047] 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.

[0048] In the present invention, unless otherwise specified, the scientific and technical terms used herein have the meanings commonly understood by those skilled in the art.

[0049] It should be noted that the terms such as "upper", "lower", "left", "right", "front", "back", etc. cited in the invention are only for the convenience of description and are not used to limit the scope of implementation of the present invention. Changes or adjustments to their relative relationships should be regarded as the scope of implementation of the present invention without substantially changing the technical content.

[0050] 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 aforementioned embodiments, those skilled in the art will be able to modify the technical solutions described in the aforementioned embodiments or substitute equivalents for some of the technical features. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A regenerative incineration device with built-in NVOCs catalytic reduction, comprising a combustion chamber and a plurality of regenerative chambers arranged below the combustion chamber and connected thereto, characterized in that: It also includes integrated plumbing; The integrated pipeline includes three pipelines arranged in an integrated manner in a transverse direction: upper, middle and lower; Of the two pipes at the upper and lower parts, one pipe is an air intake pipe and the other pipe is an exhaust pipe; The pipe in the middle is the connecting pipe for the middle gas chamber to enter and exit; The inlet and outlet connecting pipes of the middle gas chamber are equipped with NVOCs catalysts; NVOCs catalysts utilize the reducing properties of C and H in organic matter to catalytically reduce N to N2; The middle gas storage inlet and outlet connecting pipe is divided into a plurality of sub-inlet and outlet connecting pipes by a plurality of partitions; the number of the sub-inlet and outlet connecting pipes is equal to the number of the 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 and outlet connecting pipe is provided with two vents, which are respectively connected with the upper and lower pipes; each vent can be individually controlled to open and close.

2. The regenerative thermal incineration device with built-in NVOCs catalytic reduction according to claim 1 is characterized in that: It also includes a high temperature flue gas mixing box; A high-temperature flue gas mixing box is communicated with the combustion chamber; The high-temperature flue gas mixing box is also connected to the exhaust pipe of the integrated pipe through the high-temperature flue gas heat exchange pipe.

3. The regenerative thermal incineration device with built-in NVOCs catalytic reduction according to claim 2 is characterized in that: Also includes exhaust pipe; The exhaust pipe of the integrated pipe is connected to the exhaust pipe; The high-temperature flue gas mixing box is also connected to the exhaust pipe through a high-temperature flue gas direct exhaust pipe; The high-temperature flue gas heat exchange pipeline and the high-temperature flue gas direct exhaust pipeline are both provided with proportional regulating valves.

4. The regenerative thermal incineration device with built-in NVOCs catalytic reduction according to claim 1 is characterized in that: in, The filling amount of the NVOCs catalyst is half of the space of the inlet and outlet connecting pipe of the middle gas chamber, and is located on one side adjacent to the exhaust pipe.

5. The regenerative thermal incineration device with built-in NVOCs catalytic reduction according to claim 1 is characterized in that: in, The two vents of the sub-inlet and outlet connecting pipes are both provided with lifting valves to respectively control the opening and closing of the two vents.

6. The regenerative thermal incineration device with built-in NVOCs catalytic reduction according to claim 5 is characterized in that: in, Of the two lift valves of the sub-inlet and outlet connecting pipes, the lift valve of the upper vent is an upward lift valve, and the lift valve of the lower vent is a downward lift valve; The valve port and valve plate of the upward lifting valve are both arranged in the pipeline at the upper part of the integrated pipeline; the valve plate is lifted upward to leave the valve port, the vent is opened, and the valve plate is moved downward to cover the valve port, the vent is closed; The valve port and valve plate of the downward lifting valve are both arranged in the pipeline at the lower part of the integrated pipeline; the valve plate is pushed downward to leave the valve port, the vent is opened, and the valve plate is lifted upward to cover the valve port, the vent is closed; The valve bodies of both the upward poppet valve and the downward poppet valve are mounted above the integrated pipe.

7. The regenerative thermal incineration device with built-in NVOCs catalytic reduction according to claim 6 is characterized in that: in, The integrated pipeline is provided with a plurality of lift valve group inspection ports corresponding to a group of upward lift valves and downward lift valves of each sub-inlet and outlet connecting pipeline.

8. The regenerative thermal incineration device with built-in NVOCs catalytic reduction according to claim 1 is characterized in that: in, Of the two pipes at the upper and lower parts of the integrated pipe, the upper pipe is an air intake pipe, and the lower pipe is an exhaust pipe.

9. The regenerative thermal incineration device with built-in NVOCs catalytic reduction according to claim 1, characterized in that: in, A grid is provided in the inlet and outlet connecting pipe of the middle gas bin, and the NVOCs catalyst is loaded on the grid.

10. The process of the regenerative thermal incineration device with built-in NVOCs catalytic reduction as claimed in any one of claims 1 to 9, characterized in that: Nitrogen-containing volatile organic compound exhaust gas first undergoes a redox reaction with the NVOCs catalyst before entering the combustion chamber for combustion; In the redox reaction between nitrogen-containing volatile organic compound exhaust gas and NVOCs catalyst, C and H in the nitrogen-containing volatile organic compound exhaust gas undergo oxidation reaction, and N is catalytically reduced to N2.

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