Nitrogen oxide catalytic reduction box

Abstract

The application relates to the technical field of catalytic reduction of nitrogen oxide compounds, in particular to a catalytic reduction box for nitrogen oxide compounds, which comprises a reaction cavity, a heating assembly, a catalytic module, a flow guide plate, a collection tank, a support and a biomass combustion device. The support is arranged in the reaction cavity to support the catalytic module, the flow guide plate guides airflow and cooperates with the collection tank to collect byproducts, and the biomass combustion device provides a heat source. A metal catalyst layer is coated on the surface of the catalytic module, and a honeycomb-shaped channel is arranged in the catalytic module to increase the contact area and improve the catalytic efficiency. The application remarkably reduces energy consumption, improves the catalytic effect, effectively blocks particulate impurities and prolongs the service life, and is suitable for nitrogen oxide compound treatment requirements in various scenes.

Description

Technical Field

[0001] This utility model belongs to the field of environmental protection and waste gas treatment technology, specifically a nitrogen oxide catalytic reduction box. Background Technology

[0002] Nitrogen oxides (NOx) are a common air pollutant, mainly originating from industrial emissions, combustion processes, and vehicle exhaust. To reduce the environmental harm caused by NOx, catalytic reduction technology is widely used in related fields. For example, a constant-temperature emission reduction and energy-saving device for diesel engines, published in CN103806991B on January 25, 2017, reduces NOx by installing a metal-ceramic catalyst and a metal-ceramic particle collector inside the exhaust pipe, combined with a urea injection system. However, this technology requires high-temperature conditions (580°C) for the catalyst to reach optimal efficiency, resulting in high energy consumption and limited applicability. Furthermore, this device is primarily designed for diesel engine exhaust treatment and has limited adaptability to NOx treatment needs in other scenarios. To optimize this situation, a technical solution capable of efficiently reducing NOx at lower temperatures is urgently needed. For example, utilizing the characteristic of metals to begin reducing NOx at 190°C, combined with heating via biomass combustion, could reduce energy consumption and improve applicability. Utility Model Content

[0003] To overcome the shortcomings of existing technologies, this utility model provides a nitrogen oxide catalytic reduction chamber. The nitrogen oxide catalytic reduction chamber includes a reaction chamber, a heating component, a catalytic module, a guide plate, a collection tank, a support, and a biomass combustion device. Inside the reaction chamber, a support is provided to carry the catalytic module. The support is fixedly connected to the inner wall of the reaction chamber by bolts, and the catalytic module is mounted on the support. Below the catalytic module, a guide plate is provided, welded and fixed to the inner wall of the reaction chamber. The guide plate is inclined to guide the airflow in a specific direction. At the lowest end of the guide plate, a collection tank is provided, connected to the bottom of the reaction chamber by a snap-fit, for collecting byproducts generated during the catalytic process. A biomass combustion device is provided on one side of the reaction chamber, connected to the reaction chamber via a flange. Inside the biomass combustion device, a heating component is provided, fixed to the inner wall of the biomass combustion device by a threaded connection to provide a stable heat source.

[0004] Optionally, the heating assembly includes heating tubes and heat-conducting plates. Multiple heating tubes are symmetrically arranged inside the biomass combustion device. The heating tubes are fixedly connected to the inner wall of the biomass combustion device by threads. Each heating tube has a heat-conducting plate welded to its outer surface. The heat-conducting plates are evenly distributed along the axial direction of the heating tube to expand the heat transfer area.

[0005] Optionally, it also includes an air inlet pipe, a flow divider plate, and a filter screen. An air inlet pipe is provided at the top of the reaction chamber and is connected to the reaction chamber through a flange. A filter screen is provided inside the air inlet pipe and is fixedly connected to the inner wall of the air inlet pipe through a slot to filter particulate impurities in the gas entering the reaction chamber. A flow divider plate is provided at the end of the air inlet pipe and is fixedly connected to the inner wall of the air inlet pipe through bolts. Multiple flow divider holes are provided on the flow divider plate (11). The diameter of the flow divider holes on the flow divider plate (11) is the same size to distribute the gas evenly to the surface of the catalytic module.

[0006] Optionally, it also includes an exhaust pipe and a regulating valve. An exhaust pipe is provided on the other side of the reaction chamber. The exhaust pipe is connected to the reaction chamber through a flange. A regulating valve is provided in the middle of the exhaust pipe. One end of the regulating valve is fixedly connected to the exhaust pipe through a thread, and the other end is fixedly connected to the exhaust port to discharge gas.

[0007] Optionally, it also includes a heat insulation layer and a support frame. The heat insulation layer is wrapped around the outer wall of the reaction chamber and is fixedly connected to the outer wall of the reaction chamber by adhesive bonding to reduce heat loss to the outside. A support frame is provided at the bottom of the reaction chamber and is fixedly connected to the bottom of the reaction chamber by welding. The bottom of the support frame is provided with an anti-slip pad to enhance the stability of the device.

[0008] Optionally, a metal catalyst layer is coated on the surface of the catalytic module. The metal catalyst layer is attached to the surface of the catalytic module by a spraying process. The interior of the catalytic module is provided with honeycomb channels, which are uniformly distributed along the axial direction of the catalytic module to increase the contact area between the gas and the catalyst.

[0009] This invention has the following advantages: By setting the reaction chamber as the core structure of the entire device, a stable environment is provided for the catalytic reduction process. Combined with the heat source provided by the biomass combustion device, the metal catalyst can begin to reduce nitrogen oxides at a relatively low temperature (190℃), significantly reducing energy consumption and improving applicability. The metal catalyst layer coated on the surface of the catalytic module and the internal honeycomb channel design not only increase the contact area between the gas and the catalyst but also improve the catalytic efficiency. The design of the guide plate effectively guides the flow path of the gas, ensuring that the gas can be evenly distributed to the surface of the catalytic module, thereby further optimizing the catalytic effect. In addition, the filter screen can effectively block particulate impurities in the gas from entering the reaction chamber, reducing the possibility of a decrease in catalytic efficiency due to impurity accumulation and extending the service life of the device. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of the overall structure of a nitrogen oxide catalytic reduction chamber according to the present invention;

[0011] Figure 2 This is a half-sectional view of the air inlet pipe of a nitrogen oxide catalytic reduction chamber according to the present invention;

[0012] Figure 3 This is a half-sectional view of the reaction chamber of a nitrogen oxide catalytic reduction box according to the present invention;

[0013] Figure 4 This is a half-sectional view of a biomass combustion device for a nitrogen oxide catalytic reduction box according to the present invention.

[0014] Figure 5 This is a schematic diagram of the overall collection tank of a nitrogen oxide catalytic reduction box according to the present invention;

[0015] In the picture:

[0016] 1. Reaction chamber; 2. Catalytic module; 21. Support; 3. Baffle plate; 4. Collection tank; 5. Biomass combustion device; 6. Heating tube; 7. Heat-conducting plate; 9. Inlet pipe; 10. Filter screen; 11. Diverter plate; 12. Exhaust pipe; 121. Exhaust port; 13. Regulating valve; 14. Insulation layer; 15. Support frame. Detailed Implementation

[0017] 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.

[0018] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. The utility model will be further described in detail below with reference to the accompanying drawings.

[0019] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances. Example 1

[0020] like Figures 1 to 5 As shown, this utility model provides a catalytic reduction chamber for nitrogen oxides, the specific implementation of which is as follows. A support 21 is installed inside the reaction chamber 1, and the support 21 is fixedly connected to the inner wall of the reaction chamber 1 by bolts to support the catalytic module 2. The catalytic module 2 is mounted on the support 21, and its surface is coated with a metal catalyst layer. This metal catalyst layer is attached to the surface of the catalytic module 2 by a spraying process. The interior of the catalytic module 2 has honeycomb-shaped channels, which are uniformly distributed along the axial direction of the catalytic module 2. A guide plate 3 is installed below the catalytic module 2, and the guide plate 3 is welded and fixed to the inner wall of the reaction chamber 1. The guide plate 3 is inclined, and a collection trough 4 is provided at its lowest end. The collection trough 4 is connected to the bottom of the reaction chamber 1 by a snap-fit. A hinged door is also provided at the front end of the reaction chamber 1 to facilitate the removal and replacement of the collection trough 4 and the replacement of the catalytic module 2. Example 2

[0021] It should be noted that a biomass combustion device 5 is provided on one side of the reaction chamber 1. The biomass combustion device 5 is connected to the side wall of the reaction chamber 1 through a flange. Multiple heating tubes 6 are installed inside the device. The heating tubes 6 are fixedly connected to the inner wall of the biomass combustion device 5 through threads. Each heating tube 6 has a heat-conducting plate 7 welded to its outer surface. The heat-conducting plate 7 is wavy in shape and is evenly distributed along the axial direction of the heating tube 6. Example 3

[0022] The reaction chamber 1 is provided with an air inlet pipe 9 at the top. The air inlet pipe 9 is connected to the reaction chamber 1 through a flange. The air inlet pipe 9 is provided with a filter screen 10 inside. The filter screen 10 is fixedly connected to the inner wall of the air inlet pipe 9 through a slot. The air inlet pipe 9 is provided with a diverter plate 11 at the end. The diverter plate 11 is fixedly connected to the inner wall of the air inlet pipe 9 by bolts. The diverter plate 11 has multiple diverter holes. Example 4

[0023] In addition, an exhaust pipe 12 is provided on the other side of the reaction chamber 1. The exhaust pipe 12 is connected to the side wall of the reaction chamber 1 through a flange. A regulating valve 13 is provided in the middle of the exhaust pipe 12. One end of the regulating valve 13 is fixedly connected to the exhaust pipe 12 through a thread, and the other end is fixedly connected to the exhaust port 121. When catalyzing nitrogen oxides, the gas first passes through the filter screen 10 from the upper end of the intake pipe 9. The filter screen 10 can block particulate impurities in the gas and prevent impurities from entering the interior of the reaction chamber 1. The gas then passes through the diversion plate 11, and the gas is evenly distributed to the surface of the catalytic module 2 through multiple diversion holes on the diversion plate 11 to ensure that the gas can fully contact the catalytic module 2. The gas fully contacts the metal catalyst layer on the surface of the catalytic module 2, and then is blown from the honeycomb channel inside the catalytic module 2. At this time, multiple heating tubes 6 inside the biomass combustion device 5 start heating. The heat generated increases the heat transfer area through the heat-conducting plates 7 welded to the heating tubes 6, and the heat finally enters the interior of the reaction chamber 1 to maintain a stable temperature environment. Under the action of the catalytic module 2, the gas undergoes a chemical reaction. Some byproducts flow downwards with the gas flow. The inclined guide plate 3 guides the gas flow in a specific direction. The byproducts enter the collection tank 4 from the guide plate 3. When the collection tank 4 needs to be cleaned or replaced, the user can open the hinged door at the front of the reaction chamber 1 and unlock the collection tank 4 latch for cleaning and replacement. When the gas after the reaction needs to be discharged, the user rotates the handle on the regulating valve 13 to control the exhaust flow rate. The gas is discharged from the exhaust port 121 through the exhaust pipe 12. Example 5

[0024] According to Embodiment 1, the outer wall of the reaction chamber 1 is covered with a heat insulation layer 14, which is fixedly connected to the outer wall of the reaction chamber 1 by adhesive bonding. A support frame 15 is provided at the bottom of the reaction chamber 1, and the support frame 15 is fixedly connected to the bottom of the reaction chamber 1 by welding. An anti-slip pad is provided at the bottom of the support frame 15.

[0025] In actual operation, gas containing nitrogen oxides enters the reaction chamber 1 through the inlet pipe 9. The gas first passes through the filter screen 10, which is fixed to the inner wall of the inlet pipe 9 by a slot, blocking particulate impurities in the gas and preventing them from entering the reaction chamber 1. The gas then passes through the diverter plate 11, whose multiple diverting holes evenly distribute the gas to the surface of the catalytic module 2, ensuring that the gas can fully contact the catalytic module 2. The surface of the catalytic module 2 is coated with a metal catalyst layer, which is attached to the surface of the catalytic module 2 by a spraying process. The interior of the catalytic module 2 is provided with honeycomb channels, which are evenly distributed along the axial direction of the catalytic module 2, increasing the contact area between the gas and the catalyst.

[0026] The biomass combustion device 5 is connected to the reaction chamber 1 via a flange. Multiple heating tubes 6 are installed inside the biomass combustion device 5, and these tubes 6 are fixedly connected to the inner wall of the device via threads. Each heating tube 6 has a heat-conducting plate 7 welded to its outer surface. These heat-conducting plates 7 are evenly distributed along the axial direction of the heating tube 6, increasing the heat transfer area. The heat generated by the biomass combustion device 5 is transferred to the reaction chamber 1 through the flange, maintaining a stable temperature environment inside the reaction chamber 1, typically set at around 190°C, to meet the reduction conditions of the metal catalyst layer.

[0027] During the catalytic process, the gas undergoes a chemical reaction under the action of the catalytic module 2. Some byproducts flow downwards with the gas flow. The guide plate 3 is inclined, which guides the gas flow in a specific direction, ensuring that the gas is evenly distributed on the surface of the catalytic module 2. A collection groove 4 is provided at the lowest end of the guide plate 3. The collection groove 4 is connected to the bottom of the reaction chamber 1 by a snap-fit, and is used to collect the byproducts generated during the catalytic process. The gas after the reaction is discharged through the exhaust pipe 12. A regulating valve 13 is provided in the middle of the exhaust pipe 12. The regulating valve 13 is fixedly connected to the inner wall of the exhaust pipe 12 by a thread. The operator can control the exhaust flow rate by adjusting the handle, thereby regulating the internal pressure of the reaction chamber 1.

[0028] The outer wall of the reaction chamber 1 is covered with a heat insulation layer 14, which is fixedly connected to the outer wall of the reaction chamber 1 by adhesive bonding. This reduces heat loss to the outside and improves the thermal efficiency of the device. A support frame 15 is provided at the bottom of the reaction chamber 1. The support frame 15 is fixedly connected to the bottom of the reaction chamber 1 by welding. The bottom of the support frame 15 is provided with an anti-slip pad, which enhances the stability of the device and prevents displacement during operation.

[0029] In practical applications, this invention can be widely used in the field of industrial waste gas treatment, especially in scenarios requiring the catalytic reduction of gases containing nitrogen oxides. For example, in the waste gas emission systems of chemical plants or power plants, the device of this invention can be installed at the end of the waste gas pipeline for the catalytic reduction of nitrogen oxides in the waste gas. By controlling the exhaust flow rate through regulating valve 13, the pressure and gas flow rate inside the reaction chamber 1 can be adjusted according to actual needs, thereby optimizing the catalytic effect. At the same time, by turning on the heating tube 6, it can be ensured that the inside of the reaction chamber 1 is always maintained within a suitable temperature range, further improving the catalytic efficiency. The design of the collection tank 4 facilitates the periodic cleaning of by-products generated during the catalytic process, preventing the accumulation of by-products from affecting the normal operation of the device.

[0030] This invention achieves highly efficient catalytic reduction of nitrogen-containing oxide gases through the rational layout and interrelationship of the aforementioned components. The connections, positions, and interrelationships between the components are carefully designed to ensure stable operation of the device at lower temperatures, while also possessing high catalytic efficiency and a long service life.

[0031] To enable those skilled in the art to fully understand and implement this utility model, the following supplementary explanation of the specific implementation principle of this utility model is provided in conjunction with a specific application scenario.

[0032] In the waste gas treatment system of a chemical plant, waste gas containing nitrogen oxides needs to be treated by catalytic reduction before being discharged. This invention's device is installed at the end of the waste gas pipeline, and the catalytic module 2 is fixed by a bracket 21 to ensure stable operation. When the waste gas enters the reaction chamber 1 from the inlet pipe 9, it first passes through a filter screen 10. The filter screen 10 is fixed to the inner wall of the inlet pipe 9 by a slot, effectively blocking particulate impurities in the waste gas and preventing them from entering the reaction chamber 1 and affecting the catalytic effect. Subsequently, the waste gas passes through a diversion plate 11, whose multiple diversion holes evenly distribute the gas to the surface of the catalytic module 2, ensuring full contact between the waste gas and the catalytic module 2. The surface of the catalytic module 2 is coated with a metal catalyst layer, which is attached to the surface of the catalytic module 2 using a spray coating process. The honeycomb channels inside the catalyst layer are evenly distributed along the axial direction, increasing the contact area between the gas and the catalyst, thereby improving the catalytic efficiency.

[0033] The biomass combustion device 5 is connected to the reaction chamber 1 via a flange. Multiple heating tubes 6 are installed inside the device, each with a heat-conducting fin 7 welded to its outer surface. These fins are evenly distributed along the axial direction of the heating tube 6, increasing the heat transfer area. The heat generated by the biomass combustion device 5 is transferred to the reaction chamber 1 through the flange, maintaining a stable temperature environment inside the chamber, typically set at around 190°C. At this temperature, the metal catalyst layer begins to reduce nitrogen oxides in the exhaust gas, significantly reducing energy consumption.

[0034] During the catalytic process, nitrogen oxides in the exhaust gas undergo a chemical reaction under the action of the catalytic module 2, and some byproducts flow downwards with the airflow. The guide plate 3 is inclined, which can guide the airflow in a specific direction to ensure that the exhaust gas is evenly distributed on the surface of the catalytic module 2, further optimizing the catalytic effect. A collection tank 4 is provided at the lowest end of the guide plate 3. The collection tank 4 is connected to the bottom of the reaction chamber 1 by a snap-fit, and is used to collect the byproducts generated during the catalytic process. Regularly cleaning the collection tank 4 can prevent the accumulation of byproducts from affecting the normal operation of the device.

[0035] The reacted gas is discharged through exhaust pipe 12. A regulating valve 13 is installed in the middle of exhaust pipe 12, with one end fixedly connected to exhaust pipe 12 via a thread, and the other end fixedly connected to exhaust port 121. The operator can control the exhaust flow rate by adjusting the handle of regulating valve 13, thereby adjusting the pressure and gas flow rate inside the reaction chamber 1 to optimize the catalytic effect. The outer wall of reaction chamber 1 is covered with a heat insulation layer 14, which is fixedly connected to the outer wall of reaction chamber 1 by adhesive bonding, reducing heat loss to the outside and improving the thermal efficiency of the device. A support frame 15 is installed at the bottom of reaction chamber 1, which is fixedly connected to the bottom of reaction chamber 1 by welding. The bottom of the support frame has anti-slip pads to enhance the stability of the device and prevent displacement during operation.

[0036] In practical applications, this utility model device achieves highly efficient catalytic reduction treatment of nitrogen oxide-containing waste gas through the rational layout and mutual cooperation of the aforementioned components. For example, in the waste gas emission system of a chemical plant, the waste gas enters the device through the inlet pipe 9, undergoes a series of steps including filtration, diversion, and catalytic reduction, and is finally discharged through the exhaust pipe 12. The regulating valve 13 adjusts the exhaust flow rate according to actual needs to optimize the catalytic effect; the design of the collection tank 4 facilitates regular cleaning of by-products, preventing the accumulation of by-products from affecting the operation of the device. Through these designs, this utility model device can operate stably at lower temperatures, while possessing high catalytic efficiency and a long service life, meeting the needs of industrial waste gas treatment for the catalytic reduction of nitrogen oxides.

[0037] Existing technical markings: Catalytic module 2, heating tube 6 and regulating valve 13 are all common knowledge in the field. They are only used and not modified, so the control method and circuit connection will not be described in detail.

[0038] It should be noted that all electrical components mentioned in this article are connected to an external main controller and 220V AC mains power. The main controller can be a conventional known device that can be controlled by a computer or other means. The detailed description of known functions and known components is omitted in the specific implementation of this disclosure. In order to ensure the compatibility of the device, the operating methods used are consistent with the parameters of commercially available instruments.

[0039] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model 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 utility model should be included within the protection scope of the present utility model.

Claims

1. A catalytic reduction chamber for nitrogen oxides, characterized in that: The device includes a reaction chamber (1), a heating assembly, a catalytic module (2), a guide plate (3), a collection tank (4), a support (21), and a biomass combustion device (5). The reaction chamber (1) has a support (21) inside for supporting the catalytic module (2). The support (21) is fixedly connected to the inner wall of the reaction chamber (1) by bolts, and the catalytic module (2) is mounted on the support (21). The guide plate (3) is located below the catalytic module (2) and is welded to the inner wall of the reaction chamber (1). The guide plate (3) is inclined to guide the airflow in a specific direction. The collection groove (4) is provided at the lowest end of the guide plate (3). The collection groove (4) is connected to the bottom of the reaction chamber (1) by a snap fastener. The biomass combustion device (5) is provided on one side of the reaction chamber (1). The biomass combustion device (5) is connected to the reaction chamber (1) by a flange. The heating component is provided inside the biomass combustion device (5). The heating component is fixed to the inner wall of the biomass combustion device (5) by a threaded connection.

2. A nitrogen oxide catalytic reduction chamber according to claim 1, characterized in that: The heating assembly includes heating tubes (6) and heat-conducting plates (7). Multiple heating tubes (6) are symmetrically arranged inside the biomass combustion device (5). The heating tubes (6) are fixedly connected to the inner wall of the biomass combustion device (5) by threads. The outer surface of each heating tube (6) is welded with the heat-conducting plate (7). The heat-conducting plate (7) is wavy in shape and is evenly distributed along the axial direction of the heating tube (6).

3. A nitrogen oxide catalytic reduction chamber according to claim 1, characterized in that: It also includes an air inlet pipe (9), a flow divider plate (11), and a filter screen (10). The air inlet pipe (9) is provided at the top of the reaction chamber (1). The air inlet pipe (9) is connected to the reaction chamber (1) through a flange. The filter screen (10) is provided inside the air inlet pipe (9). The filter screen (10) is fixedly connected to the inner wall of the air inlet pipe (9) through a slot. The flow divider plate (11) is provided at the end of the air inlet pipe (9). The flow divider plate (11) is fixedly connected to the inner wall of the air inlet pipe (9) through bolts. The flow divider plate (11) has multiple flow divider holes.

4. A nitrogen oxide catalytic reduction chamber according to claim 1, characterized in that: It also includes an exhaust pipe (12) and a regulating valve (13). The exhaust pipe (12) is provided on the other side of the reaction chamber (1). The exhaust pipe (12) is connected to the reaction chamber (1) through a flange. The regulating valve (13) is provided in the middle of the exhaust pipe (12). An exhaust port (121) is provided at the other end of the exhaust pipe (12). The regulating valve (13) is fixedly connected to the exhaust pipe (12) at one end by a thread and fixedly connected to the exhaust port (121) at the other end.

5. A nitrogen oxide catalytic reduction chamber according to claim 1, characterized in that: It also includes a heat insulation layer (14) and a support frame (15). The heat insulation layer (14) is wrapped around the outer wall of the reaction chamber (1). The heat insulation layer (14) is fixedly connected to the outer wall of the reaction chamber (1) by adhesive bonding. The support frame (15) is provided at the bottom of the reaction chamber (1). The support frame (15) is fixedly connected to the bottom of the reaction chamber (1) by welding. The bottom of the support frame (15) is provided with an anti-slip pad.

6. A nitrogen oxide catalytic reduction chamber according to claim 1, characterized in that: in The surface of the catalytic module (2) is coated with a metal catalyst layer, which is attached to the surface of the catalytic module (2) by a spraying process. The interior of the catalytic module (2) is provided with honeycomb channels, which are uniformly distributed along the axial direction of the catalytic module (2).

7. A nitrogen oxide catalytic reduction chamber according to claim 3, characterized in that: The diameters of the diversion holes on the diversion plate (11) are all the same size.

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