High-pressure-bearing SCR (Selective Catalytic Reduction) denitration reactor

Abstract

The utility model discloses a high pressure-bearing SCR (Selective Catalytic Reduction) denitration reactor which comprises a tank body, the top of the tank body is fixedly connected with a tank cover, the top of the tank cover is fixedly connected with a smoke suction valve, the input end of the smoke suction valve is communicated with a gas inlet pipe, the output end of the smoke suction valve extends to the lower part of the tank cover and is fixedly connected with a flow divider, and the flow divider is communicated with a gas inlet pipe. And the flow divider is fixedly connected with the tank cover. The smoke suction valve, the flow divider and the gas inlet branch pipe are matched, so that gas can uniformly enter the tank body, the denitration reaction uniformity is ensured, the pressure of the tank body can be effectively controlled and the equipment safety is improved through the matching of the pressure control valve and the safety valve, and the supporting ring, the bearing disc, the clamping opening and the clamping frame are matched, so that the safety of the equipment is improved. The catalyst unit is convenient to mount and fix, the structure is stable, and meanwhile, the single unit is convenient to replace after the catalyst is inactivated, so that the use cost can be saved.

Description

Technical Field

[0001] This utility model relates to the field of SCR denitrification reaction technology, specifically a high-pressure SCR denitrification reactor. Background Technology

[0002] With increasingly stringent environmental protection requirements, SCR (Selective Catalytic Reduction) denitrification technology has been widely applied in industries such as power, steel, and chemicals due to its high denitrification efficiency. Among numerous denitrification technologies, SCR (Selective Catalytic Reduction) has become the most widely used denitrification method due to its significant advantage of efficiently converting nitrogen oxides into nitrogen and water under medium and low temperature conditions. This technology removes nitrogen oxides by injecting a reducing agent such as ammonia into the waste gas containing nitrogen oxides, where a selective catalytic reduction reaction occurs under the action of a catalyst. However, in certain industrial scenarios, such as some chemical synthesis processes, high-pressure combustion power generation systems, and certain special metallurgical processes, the waste gas generated is often in a high-pressure environment.

[0003] In certain special operating conditions, such as industrial production processes under high pressure, existing SCR denitrification reactors face the problem of insufficient pressure-bearing capacity. Most existing SCR denitrification reactors are designed for atmospheric or low-pressure conditions. When these conventional reactors are applied to high-pressure environments, they face numerous insurmountable problems. First, from a structural strength perspective, the outer shell and internal support structure of ordinary reactors cannot withstand excessive pressure and are prone to deformation under high pressure, even rupture in severe cases, leading to reactor malfunction and potential safety accidents. Second, under high pressure, parameters such as gas velocity, flow rate, and pressure distribution change more complexly. Existing inlet gas distribution and outlet gas collection devices struggle to achieve uniform and stable gas flow distribution and collection. This results in significant differences in reaction conditions across different areas of the reactor, with some areas experiencing incomplete reactions, thus significantly reducing the overall denitrification efficiency.

[0004] Therefore, a high-pressure SCR denitrification reactor is needed to solve this problem. Utility Model Content

[0005] To address the problems mentioned in the background art, the purpose of this utility model is to provide a high-pressure SCR denitrification reactor, which solves the problem that most existing SCR denitrification reactors are designed based on atmospheric or low-pressure conditions and have insufficient pressure-bearing capacity when facing high-pressure environments.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a high-pressure SCR denitrification reactor, comprising a tank body, a tank cover fixedly connected to the top of the tank body, a smoke valve fixedly connected to the top of the tank cover, an inlet pipe connected to the input end of the smoke valve, an output end of the smoke valve extending to the bottom of the tank cover and fixedly connected to a distributor, the distributor being fixedly connected to the tank cover, a plurality of annularly arranged inlet branch pipes connected to the bottom of the distributor, a pressure control valve connected to the top of the tank cover, the input end of the pressure control valve penetrating the tank cover and connected to a safety valve through a pressure balance pipe, two support rings fixedly connected to the inner wall of the tank body, the two support rings being symmetrically arranged, a bearing plate fixedly connected to the top of the support rings, a plurality of snap-fit ​​interfaces opened on the top of the bearing plate, the plurality of snap-fit ​​interfaces being evenly arranged, a snap-fit ​​frame snapping into the inner wall of the snap-fit ​​interface, and a catalyst unit being disposed inside the snap-fit ​​frame.

[0007] As a preferred embodiment of this utility model, both the can body and the can lid are provided with stainless steel inner liner, and the outer side of the stainless steel inner liner is provided with a ceramic fiber felt layer, a carbon fiber reinforcement layer and a wear-resistant coating from the inside to the outside.

[0008] As a preferred embodiment of this invention, a pressure sensor is fixedly connected to the top of the inner wall of the can lid, and the pressure sensor is electrically connected to the safety valve.

[0009] As a preferred embodiment of this utility model, a sealing ring is fixedly connected to the inner wall of the can lid, and the sealing ring is used in conjunction with the can body; a sealing gasket is fixedly connected to the bottom of the support plate; and a sealing groove is provided on the top of the support ring, and the sealing groove is engaged with the sealing gasket.

[0010] As a preferred embodiment of this invention, a guide plate is fixedly connected to the top of the bearing plate, and a reinforcing block is fixedly connected to the bottom of the support ring, with the reinforcing block being fixedly connected to the tank body.

[0011] As a preferred embodiment of this invention, the outer side of the air inlet branch pipe is connected to a flow regulating valve, and the bottom of the tank is connected to an exhaust pipe with a discharge valve.

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

[0013] 1. This utility model, through the cooperation of the smoke valve, the distributor and the air inlet branch pipe, can make the gas enter the tank evenly, ensuring the uniformity of the denitrification reaction. Through the cooperation of the pressure control valve and the safety valve, the tank pressure can be effectively controlled, improving the safety of the equipment. Through the cooperation of the support ring, the bearing plate, the snap-fit ​​interface and the snap-fit ​​frame, the installation and fixing of the catalyst unit is convenient and the structure is stable. At the same time, it is convenient to replace individual units after the catalyst is deactivated, thereby saving operating costs.

[0014] 2. This utility model features a stainless steel inner liner, which provides excellent corrosion resistance, resisting the erosion of acidic substances in flue gas and extending the service life of the equipment. The ceramic fiber felt layer provides excellent heat insulation, reducing heat loss and energy consumption, while also preventing safety hazards caused by excessively high surface temperatures of the tank body and lid. The carbon fiber reinforcement layer enhances the overall strength and toughness of the equipment, enabling it to withstand high pressure. The wear-resistant coating improves the wear resistance of the tank body and lid, further extending their service life. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model;

[0016] Figure 2 This is a partial cross-sectional perspective view of the structure of this utility model;

[0017] Figure 3 This is a partial cross-sectional perspective view of the support ring, bearing disk and catalyst unit used in conjunction with the present invention.

[0018] Figure 4 This is a bottom-view perspective view of the can lid of this utility model;

[0019] Figure 5 This is a partial cross-sectional perspective view of the tank body of this utility model.

[0020] In the diagram: 1. Tank body; 2. Tank lid; 3. Smoke valve; 4. Inlet pipe; 5. Diverter; 6. Inlet branch pipe; 7. Pressure control valve; 8. Safety valve; 9. Support ring; 10. Bearing plate; 11. Snap-fit ​​interface; 12. Snap-fit ​​frame; 13. Catalyst unit; 14. Stainless steel inner liner; 15. Ceramic fiber felt layer; 16. Carbon fiber reinforcement layer; 17. Wear-resistant coating; 18. Pressure sensor; 19. Sealing ring; 20. Sealing gasket; 21. Flow guide plate; 22. Reinforcing block; 23. Flow regulating valve. Detailed Implementation

[0021] 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.

[0022] like Figures 1 to 5As shown, this utility model provides a high-pressure SCR denitrification reactor, including a tank body 1. A tank cover 2 is fixedly connected to the top of the tank body 1. A smoke valve 3 is fixedly connected to the top of the tank cover 2. The input end of the smoke valve 3 is connected to an air inlet pipe 4. The output end of the smoke valve 3 extends to the bottom of the tank cover 2 and is fixedly connected to a distributor 5, which is also fixedly connected to the tank cover 2. The bottom of the distributor 5 is connected to several annularly arranged air inlet branch pipes 6. A pressure control valve 7 is connected to the top of the tank cover 2. The input end of the pressure control valve 7 passes through the tank cover 2 and is connected to a safety valve 8 through a pressure balance pipe. Two support rings 9 are fixedly connected to the inner wall of the tank body 1. The support rings 9 are symmetrically arranged, and the top of the support ring 9 is fixedly connected to the bearing plate 10. The top of the bearing plate 10 has several locking interfaces 11, which are evenly arranged. The inner wall of the locking interface 11 is fitted with a locking frame 12. The inside of the locking frame 12 is equipped with a catalyst unit 13, which is filled with a high-efficiency denitrification catalyst. This denitrification catalyst is a product currently on the market, such as modified vanadium-titanium catalyst, molecular sieve-based denitrification catalyst, activated carbon-based denitrification catalyst, etc. They can maintain their activity and service life under high pressure environment, and have strong pressure resistance and anti-poisoning ability, enabling them to operate stably under complex working conditions.

[0023] refer to Figure 5 Both the tank body 1 and the tank lid 2 are equipped with stainless steel inner liner 14. The outer side of the stainless steel inner liner 14 is provided with a ceramic fiber felt layer 15, a carbon fiber reinforcement layer 16 and a wear-resistant coating 17 from the inside to the outside.

[0024] As a technical optimization of this utility model, the stainless steel inner liner 14 has good corrosion resistance, can resist the erosion of acidic substances in flue gas, and extend the service life of the equipment. The ceramic fiber felt layer 15 has excellent heat insulation performance, which can reduce heat loss and energy consumption, and at the same time avoid the safety hazards caused by excessive surface temperature of the tank body 1 and the tank cover 2. The carbon fiber reinforcement layer 16 can improve the overall strength and toughness of the equipment, enabling it to withstand high pressure. The wear-resistant coating 17 can improve the wear resistance of the tank body 1 and the tank cover 2, thereby further extending their service life.

[0025] refer to Figure 4 A pressure sensor 18 is fixedly connected to the top of the inner wall of the can lid 2, and the pressure sensor 18 is electrically connected to the safety valve 8.

[0026] As a technical optimization of this utility model, the pressure sensor 18 can monitor the pressure inside the tank 1 in real time. When electrically connected to the safety valve 8, it can realize automatic pressure control. When the pressure exceeds the set value, the safety valve 8 is triggered in time to release pressure, thereby improving the safety and stability of the equipment operation and eliminating the need for frequent manual monitoring and operation.

[0027] refer to Figure 2 and Figure 4 A sealing ring 19 is fixedly connected to the inner wall of the can lid 2, and the sealing ring 19 is used in conjunction with the can body 1. A sealing gasket 20 is fixedly connected to the bottom of the bearing plate 10. A sealing groove is opened on the top of the support ring 9, and the sealing groove is engaged with the sealing gasket 20.

[0028] As a technical optimization of this utility model, the sealing ring 19 can enhance the sealing between the tank cover 2 and the tank body 1, prevent gas leakage, ensure that the denitrification reaction is carried out in a closed environment, improve the reaction efficiency, and avoid environmental pollution caused by the leakage of harmful gases. The sealing gasket 20 and the sealing groove can further strengthen the sealing between the bearing plate 10 and the support ring 9, prevent gas from leaking from the connection, and improve the stability of the bearing plate 10 installation.

[0029] refer to Figure 3 A guide plate 21 is fixedly connected to the top of the bearing plate 10, and a reinforcing block 22 is fixedly connected to the bottom of the support ring 9, and the reinforcing block 22 is fixedly connected to the tank body 1.

[0030] As a technical optimization of this utility model, the flow guide plate 21 can guide the gas flow, making the gas flow more evenly through the catalyst unit 13, thereby improving the denitrification reaction efficiency. The reinforcing block 22 can enhance the connection strength between the support ring 9 and the tank 1, improve the stability of the support ring 9, and enable it to better support the weight of the catalyst unit 13, thus ensuring the structural safety of the equipment.

[0031] refer to Figure 2 and Figure 4 The outer side of the air inlet branch pipe 6 is connected to a flow regulating valve 23, and the bottom of the tank body 1 is connected to an exhaust pipe with a discharge valve.

[0032] As a technical optimization of this utility model, by setting the flow regulating valve 23, the flow rate of the gas in the inlet branch pipe 6 can be adjusted according to the actual reaction requirements, so that the gas flow rate matches the catalyst activity, reaction temperature and other conditions, thereby optimizing the denitrification reaction effect. By setting the exhaust pipe with the discharge valve, the exhaust can be stopped when needed, such as when the equipment is under maintenance or malfunctions. At the same time, the exhaust speed can also be adjusted, which is conducive to the stable operation of the system.

[0033] The working principle and usage process of this utility model are as follows: When using this high-pressure SCR denitrification reactor, the external flue gas containing nitrogen oxides to be treated is first introduced into the smoke valve 3 through the inlet pipe 4. Then, the output end of the pressure control valve 7 is connected to the external smoke collection device. The smoke valve 3 controls the gas inflow, and the gas is evenly distributed to each inlet branch pipe 6 by the distributor 5. The gas is then transported to the inside of the tank 1 through the inlet branch pipe 6. After the gas flows out from the inlet branch pipe 6, it diffuses evenly into the inside of the tank 1. At this time, the flow rate of the gas in the inlet branch pipe 6 can be adjusted according to the actual reaction requirements by setting the flow regulating valve 23. Then, the flue gas comes into full contact with the catalyst unit 13 placed on the bearing plate 10 and the interface 11. Under the action of the catalyst, the nitrogen oxides in the gas undergo a selective catalytic reduction reaction with the reducing agent, converting the nitrogen oxides into nitrogen and water, thereby achieving the purpose of denitrification. At this time, the pressure sensor 18 monitors the internal pressure of the tank cover 2 in real time. When the internal pressure of the tank 1 increases due to the reaction or other factors, the pressure sensor 18 converts the pressure signal into electrical signal. The signal is transmitted to safety valve 8, which then opens, allowing excess gas inside tank 1 to be temporarily collected by an external smoke collection device via the pressure balance pipe. Pressure control valve 7 regulates the pressure inside tank 1 to maintain it within a safe range. The reacted gas flows to the bottom of tank 1 and is discharged through an exhaust pipe with a discharge valve, completing the entire denitrification process. The discharge valve controls the gas discharge speed and flow rate, facilitating equipment operation and management. Throughout the denitrification process, the stainless steel inner liner 14 provides excellent corrosion resistance, protecting against acidic substances in the flue gas and extending equipment lifespan. The ceramic fiber felt layer 15 provides excellent heat insulation, reducing heat loss and energy consumption, while preventing excessive surface temperatures of tank 1 and lid 2 from causing safety hazards. The carbon fiber reinforcement layer 16 improves the overall strength and toughness of the equipment, enabling it to withstand high pressure. The wear-resistant coating 17 enhances the wear resistance of tank 1 and lid 2, further extending their service life.

[0034] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0035] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A high-pressure SCR denitration reactor comprising a tank body (1), characterized in that: The top of the tank body (1) is fixedly connected with a tank cover (2), the top of the tank cover (2) is fixedly connected with a smoking valve (3), the input end of the smoking valve (3) is communicated with an air inlet pipe (4), the output end of the smoking valve (3) extends below the tank cover (2) and is fixedly connected with a flow divider (5), and the flow divider (5) is fixedly connected with the tank cover (2), the bottom of the flow divider (5) is communicated with a plurality of annularly and uniformly arranged air inlet branch pipes (6), the top of the tank cover (2) is communicated with a pressure control valve (7), the input end of the pressure control valve (7) is communicated with a safety valve (8) through a pressure balance pipe penetrating through the tank cover (2), the inner wall of the tank body (1) is fixedly connected with two supporting rings (9), and the two supporting rings (9) are symmetrically arranged, the top of the supporting ring (9) is fixedly connected with a bearing disc (10), the top of the bearing disc (10) is provided with a plurality of clamping interfaces (11) which are uniformly arranged, the inner wall of the clamping interface (11) is clamped with a clamping frame (12), and the inside of the clamping frame (12) is provided with a catalyst unit (13).

2. The high-pressure SCR denitration reactor according to claim 1, characterized in that: The inside of the tank body (1) and the tank cover (2) is provided with a stainless steel liner (14), and the outer side of the stainless steel liner (14) is sequentially provided with a ceramic fiber felt layer (15), a carbon fiber reinforced layer (16) and a wear-resistant coating (17) from inside to outside.

3. The high-pressure SCR denitration reactor according to claim 1, characterized in that: The top of the inner wall of the tank cover (2) is fixedly connected with a pressure sensor (18), and the pressure sensor (18) is electrically connected with the safety valve (8).

4. The high-pressure SCR denitration reactor according to claim 1, characterized in that: The inner wall of the tank cover (2) is fixedly connected with a sealing ring (19), and the sealing ring (19) is used in cooperation with the tank body (1), the bottom of the bearing disc (10) is fixedly connected with a sealing gasket (20), the top of the supporting ring (9) is provided with a sealing groove, and the sealing groove is clamped with the sealing gasket (20).

5. The high-pressure SCR denitration reactor according to claim 1, characterized in that: The top of the bearing disc (10) is fixedly connected with a flow guide disc (21), the bottom of the supporting ring (9) is fixedly connected with a reinforcing block (22), and the reinforcing block (22) is fixedly connected with the tank body (1).

6. The high-pressure SCR denitration reactor according to claim 1, characterized in that: The outer side of the air inlet branch pipe (6) is communicated with a flow regulating valve (23), and the bottom of the tank body (1) is communicated with an exhaust pipe with a discharge valve.

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