SCR (Selective Catalytic Reduction) denitration system convenient to fix and heat
By setting heating resistance wires and rotating baffle structures in the SCR denitrification reactor, the problem of catalyst deactivation under high moisture content flue gas was solved, catalyst surface temperature control and denitrification efficiency were improved, and the risk of burns was avoided.
Patent Information
- Application Number
- CN202423183405.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-24
- Publication Date
- 2025-11-21
- Estimated Expiration
- 2034-12-24
AI Technical Summary
In existing SCR denitrification reactors, under high water content flue gas conditions, liquid water adheres to the catalyst surface to form ammonium bisulfate, leading to catalyst deactivation and reduced denitrification efficiency. Furthermore, the liquid water affects the physical properties of the catalyst, causing blockage.
A heating resistance wire body is fixed on the inner wall of the SCR denitrification reactor using a fixing frame. The heating resistance wire is fixed by a rotating block and a pin structure, which controls the surface temperature of the catalyst, avoids the formation of condensate, and improves the physical stability of the catalyst.
It effectively prevents the formation of condensate on the catalyst surface, improves denitrification efficiency, avoids catalyst deactivation, ensures the efficient operation of the denitrification reactor, and protects the outside of the reactor from burns with heat insulation cotton.
Smart Images
Figure CN223570425U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the field of SCR denitration technology, concretely is a kind of convenient fixed heating's SCR denitration system. BACKGROUND
[0002] SCR denitration, namely selective catalytic reduction technology, is a kind of efficient flue gas denitration technology, and SCR denitration technology has been widely used in thermal power plant, industrial boiler, cement kiln and other flue gas denitration engineering, and SCR denitration reactor needs to be used in SCR denitration system, and the existing SCR denitration reactor still has certain defects when using.
[0003] With the increasingly stringent environmental protection requirements, the emission concentration requirements of NO x In non-electricity industry in many areas are continuously reduced, many areas of non-electricity industry select SCR process to carry out denitration, but the flue gas of certain non-electricity industry, for example papermaking alkali furnace, coking coke oven, flue gas moisture content is big, in the stage of starting furnace, high moisture content high-temperature flue gas contacts with normal temperature catalyst, and liquid condensate water can be generated on the surface of catalyst, liquid water can be attached to the surface of denitration catalyst, absorbs SO2 and NH3 to generate ammonium bisulfate, causes catalyst specific surface to drop, thereby affecting denitration effect, in serious case, this can lead to catalyst deactivation, in addition, the existence of liquid water can also affect the physical properties of catalyst, such as the blockage of pore structure, which can reduce the effective surface area of catalyst, and further reduce its denitration efficiency. CONTENT OF UTILITY MODEL
[0004] The utility model aims at providing a kind of convenient fixed heating's SCR denitration system to solve the problem of low denitration efficiency of the SCR denitration reactor in the market at present raised in the above background technology.
[0005] In order to achieve the above object, the utility model provides the following technical scheme: A convenient fixed heating's SCR denitration system, include: Denitration reactor main part, flue gas import, flue gas export, rectifier grid, first layer catalyst, second layer catalyst and third layer catalyst, the one end of denitration reactor main part is provided with flue gas import, the other end of denitration reactor main part is provided with flue gas export, the inside rectifier grid is installed to the denitration reactor main part near flue gas import, the inside of denitration reactor main part is installed successively with first layer catalyst, second layer catalyst and third layer catalyst from top to bottom, the inner wall welding of denitration reactor main part has fixed frame, the inner wall mounting of fixed frame has connecting shaft, the outside rotation of connecting shaft is connected with the block, the outside installation of denitration reactor main body has resistance wire controller, the surface of fixed frame is provided with heating resistance wire main part, the heat -resisting power cord is connected between heating resistance wire main part and resistance wire controller, the bottom of fixed frame is connected with connecting block near connecting shaft, the inside sliding connection of connecting block has bolt, the outside connection of bolt has limit sliding block, the heat -resisting compression spring is connected between limit sliding block and connecting block.
[0006] Preferably, the inside of the connecting block is inserted into the limiting block, and the outside of the denitration reactor main body is installed with heat insulation cotton.
[0007] Preferably, the block and the connecting shaft constitute a rotating structure, and the shape of the block is L-shaped.
[0008] Preferably, the shape of the heating resistance wire main body is a back-shaped, and the limiting block and the connecting block constitute a plug-in structure.
[0009] Preferably, the inside of the limiting block is provided with a through hole matched with the size of the bolt.
[0010] Preferably, the size of the heating resistance wire main body is matched with the size of the inner wall of the denitration reactor main body.
[0011] Compared with the prior art, the beneficial effects of the utility model are that: the convenient fixed heating SCR denitration system can place the heating resistance wire main body on the surface of the fixed frame, when the stop block moves, it can rotate through the connecting shaft, when the stop block rotates to the maximum angle, its end part can move to the inner wall surface of the denitration reactor main body, when the bolt moves, it can drive the limiting sliding block to move, when the limiting sliding block moves, it can compress the heat resisting compression spring, when the heat resisting compression spring is compressed to the maximum extent, it can insert one end of the limiting block with the through hole into the connecting block, when the bolt is loosened, it can reset through the heat resisting compression spring, when the bolt resets, its end part can penetrate the through hole on the limiting block, thereby limiting the limiting block, the heating resistance wire main body can start heating through the resistance wire controller, when the temperature of the heating resistance wire main body gradually rises, it can improve the temperature inside the denitration reactor main body, the hufan-shaped heating resistance wire main body can achieve the effect of uniform heating, because the temperature inside the denitration reactor main body is high, the surface of the first layer of catalyst, the second layer of catalyst and the third layer of catalyst is not easy to form condensed water, thereby not easy to affect the physical properties of the first layer of catalyst, the second layer of catalyst and the third layer of catalyst, the formation of condensed water can be greatly reduced through the heating resistance wire main body, thereby improving the denitration efficiency of the denitration reactor main body, and the outer side surface of the denitration reactor main body can be assisted and protected through the heat insulation cotton, avoiding that the high temperature of the outer surface of the denitration reactor main body causes scald to personnel. BRIEF DESCRIPTION OF DRAWINGS
[0012] Figure 1 It is the front view structure schematic drawing of the utility model;
[0013] Figure 2 It is the front view cut structure schematic drawing of the denitration reactor main body of the utility model;
[0014] Figure 3 It is the front view cut structure schematic drawing of the connecting block of the utility model;
[0015] Figure 4 It is the plan view structure schematic drawing of the heating resistance wire of the utility model.
[0016] In the drawing: 1, denitration reactor main body;2, flue gas inlet;3, flue gas outlet;4, rectifier grid;5, first layer of catalyst;6, second layer of catalyst;7, third layer of catalyst;8, fixed frame;9, connecting shaft;10, stop block;11, resistance wire controller;12, heating resistance wire main body;13, connecting block;14, bolt;15, limiting sliding block;16, heat resisting compression spring;17, limiting block;18, heat insulation cotton. DETAILED DESCRIPTION
[0017] Clearly, the described embodiments are merely a part of the embodiments of the present application, but not all the embodiments. Based on the embodiments of the present application, all the other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the present application.
[0018] Please refer to Figures 1-4 It can be known that the present application provides a technical scheme: a convenient fixed heating SCR denitration system, comprising: a denitration reactor main body 1, a flue gas inlet 2, a flue gas outlet 3, a rectifier grid 4, a first layer catalyst 5, a second layer catalyst 6 and a third layer catalyst 7, the flue gas inlet 2 is arranged at one end of the denitration reactor main body 1, the flue gas outlet 3 is arranged at the other end of the denitration reactor main body 1, the rectifier grid 4 is installed inside the denitration reactor main body 1 close to the flue gas inlet 2, the first layer catalyst 5, the second layer catalyst 6 and the third layer catalyst 7 are sequentially installed in the denitration reactor main body 1 from top to bottom, the fixed frame 8 is welded on the inner wall of the denitration reactor main body 1, the connecting shaft 9 is installed on the inner wall of the fixed frame 8, the stop block 10 is rotatably connected to the outer side of the connecting shaft 9, the resistance wire controller 11 is installed on the outer side of the denitration reactor main body 1, the heating resistance wire main body 12 is arranged on the surface of the fixed frame 8, the heating resistance wire main body 12 and the resistance wire controller 11 are connected through the heat-resistant power line, the connecting block 13 is connected to the bottom of the fixed frame 8 close to the connecting shaft 9, the bolt 14 is slidably connected in the connecting block 13, the limiting sliding block 15 is connected to the outer side of the bolt 14, the heat-resistant compression spring 16 is connected between the limiting sliding block 15 and the connecting block 13, the limiting block 17 is inserted into the connecting block 13, the heat insulation cotton 18 is installed on the outer side of the denitration reactor main body 1, the rotating structure is formed between the stop block 10 and the connecting shaft 9, the shape of the stop block 10 is L-shaped, the shape of the heating resistance wire main body 12 is a back-to-back character, the inserting structure is formed between the limiting block 17 and the connecting block 13, the through hole with the same size as the bolt 14 is formed in the limiting block 17, the size of the heating resistance wire main body 12 matches the size of the inner wall of the denitration reactor main body 1, and the heat insulation cotton 18 is provided with three groups on the outer side of the denitration reactor main body 1.
[0019] In practice, due to the contact between the high-temperature flue gas with high water content and the room-temperature catalyst, liquid condensate will be generated on the catalyst surface. This liquid water will adhere to the surface of the denitrification catalyst, thus affecting the denitrification efficiency of the denitrification reactor body 1. The heating resistance wire body 12 can be placed on the surface of the fixed frame 8, and the stop block 10 can be pulled towards the heating resistance wire body 12. When the stop block 10 moves, it can be rotated through the connecting shaft 9. When the stop block 10 is rotated to its maximum angle, its end can move to the denitrification reactor body. The inner wall surface of 1 is moved, and the pin 14 is pulled away from the fixed frame 8. When the pin 14 moves, it can drive the limiting slider 15 to move. When the limiting slider 15 moves, it can compress the heat-resistant compression spring 16. When the heat-resistant compression spring 16 is compressed to the maximum extent, the end of the limiting block 17 with the through hole can be inserted into the connecting block 13, so that the other end of the limiting block 17 is located on the outer surface of the stop block 10. At this time, the pin 14 can be released. When the pin 14 is released, it can be re-released by the heat-resistant compression spring 16. When the pin 14 is reset, its end can pass through the through hole on the limiting block 17, thereby limiting the limiting block 17 and making it difficult for the limiting block 17 to slide out from the inside of the connecting block 13. At the same time, the stop block 10 can limit the heating resistance wire body 12 on the fixed frame 8, making it difficult for the heating resistance wire body 12 to shake or shift its position. Before the denitrification reactor body 1 is put into operation, the heating resistance wire body 12 can be controlled to start heating through the resistance wire controller 11. When the temperature of the heating resistance wire body 12 gradually rises, it can increase the internal temperature of the denitrification reactor body 1. The U-shaped heating resistance wire body 12 can achieve a uniform heating effect. When the internal temperature of the denitrification reactor body 1 reaches a certain value, the flue gas can be introduced into the denitrification reactor body 1 through the flue gas inlet 2. Because the internal temperature of the denitrification reactor body 1 is high, the surface of the first catalyst layer 5, the second catalyst layer 6 and the third catalyst layer 7 is not prone to condensation, thus not easily affecting the physical properties of the first catalyst layer 5, the second catalyst layer 6 and the third catalyst layer 7.
[0020] See Figures 1-4 It can be seen that heating the resistance wire body 12 can significantly reduce the formation of condensate, thereby improving the denitrification efficiency of the denitrification reactor body 1. Furthermore, the heat insulation cotton 18 can provide auxiliary protection for the outer surface of the denitrification reactor body 1, preventing the outer surface of the denitrification reactor body 1 from being too hot and causing burns to personnel.
[0021] In summary, when the convenient fixed heating SCR denitration system is used, the heating resistance wire body 12 can be placed on the surface of the fixed frame 8, and the block 10 is pulled towards the heating resistance wire body 12, when the block 10 moves, it can rotate through the connecting shaft 9, and the formation of condensed water can be greatly reduced through the heating resistance wire body 12, thereby improving the denitration efficiency of the denitration reactor body 1, and the outer surface of the denitration reactor body 1 can be assisted and protected through the heat insulation cotton 18, so as to avoid that the outer surface of the denitration reactor body 1 is too high in temperature and causes scalding to personnel, and the contents not described in detail in the description belong to the prior art known by the person skilled in the art.
[0022] Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments or make equivalent replacement to part of the technical features, and any modification, equivalent replacement, improvement, etc. within the spirit and principle of the utility model should be included in the protection scope of the utility model.
Claims
1. A convenient fixed-heating SCR denitrification system, comprising: Denitration reactor main body (1), flue gas inlet (2), flue gas outlet (3), rectifying grid (4), first layer of catalyst (5), second layer of catalyst (6) and third layer of catalyst (7), characterized in that: One end of the denitration reactor main body (1) is provided with a flue gas inlet (2), the other end of the denitration reactor main body (1) is provided with a flue gas outlet (3), a rectifying grid (4) is installed inside the denitration reactor main body (1) near the flue gas inlet (2), and the first layer of catalyst (5), the second layer of catalyst (6) and the third layer of catalyst (7) are installed inside the denitration reactor main body (1) in sequence from top to bottom; A fixed frame (8) is welded on the inner wall of the denitration reactor main body (1), a connecting shaft (9) is installed on the inner wall of the fixed frame (8), a baffle (10) is rotatably connected to the outside of the connecting shaft (9), a resistance wire controller (11) is installed on the outside of the denitration reactor main body (1), a heating resistance wire main body (12) is arranged on the surface of the fixed frame (8), the heating resistance wire main body (12) is connected to the resistance wire controller (11) through a heat-resistant power cord, a connecting block (13) is connected to the bottom of the fixed frame (8) near the connecting shaft (9), a plug pin (14) is slidably connected inside the connecting block (13), a limiting slider (15) is connected to the outside of the plug pin (14), and a heat-resistant compression spring (16) is jointly connected between the limiting slider (15) and the connecting block (13).
2. The SCR denitrification system with convenient fixed heating according to claim 1, characterized in that: A limiting block (17) is inserted inside the connecting block (13), and a heat-insulating cotton (18) is installed on the outside of the denitration reactor main body (1).
3. The SCR denitrification system with convenient fixed heating according to claim 1, characterized in that: The baffle (10) and the connecting shaft (9) form a rotating structure, and the shape of the baffle (10) is L-shaped.
4. The SCR denitrification system with convenient fixed heating according to claim 2, characterized in that: The shape of the heating resistance wire main body (12) is square-shaped, and the limiting block (17) and the connecting block (13) form a plug-in structure.
5. The SCR denitrification system with convenient fixed heating according to claim 4, characterized in that: A through hole matching the size of the plug pin (14) is penetrated inside the limiting block (17).
6. The SCR denitrification system with convenient fixed heating according to claim 4, characterized in that: The size of the heating resistance wire main body (12) matches the inner wall size of the denitration reactor main body (1).