Low-temperature SCR (Selective Catalytic Reduction) denitration equipment

Abstract

The utility model relates to the field of denitration equipment, and discloses low-temperature SCR denitration equipment which comprises a smoke exhaust pipe, a catalytic reaction smoke pipe is fixedly installed on the upper surface of the smoke exhaust pipe, fixed baffles are symmetrically and fixedly connected to the middle of one side of the inner wall of the catalytic reaction smoke pipe, a catalytic reaction cavity is formed between the two fixed baffles, and a plurality of smoke exhaust holes are formed in the upper surfaces of the fixed baffles in a penetrating mode. A screw rod is rotatably mounted in the middle of one side of the inner wall of the catalytic reaction cavity, a servo motor is mounted at the position, extending out of the catalytic reaction smoke pipe, of one side of the screw rod, a movable block sleeves the outer surface of the screw rod, rotating rods are rotatably mounted in the middles of the front and rear ends of the movable block, and a plurality of shifting plates are fixedly mounted on the outer surfaces of the rotating rods; the stirring plate moves along the interior of the catalytic reaction cavity, so that the effect of conveniently turning over the stacked vanadium-titanium-manganese-cerium catalyst is achieved, the overall use efficiency of the vanadium-titanium-manganese-cerium catalyst is improved, and the problem that the catalytic reaction is affected by water vapor and ash accumulated on the outer surface of the vanadium-titanium-manganese-cerium catalyst is solved.

Description

Technical Field

[0001] The present application relates to the field of denitration equipment, and in particular to a low-temperature SCR denitration equipment. Background Art

[0002] Low-temperature SCR denitrification is a technology used to reduce nitrogen oxide (NOx) emissions from diesel engine exhaust. Compared to traditional SCR technology, low-temperature SCR is specifically designed to treat low-temperature exhaust gas produced by diesel engines. The temperature of these exhaust gases is usually between 150°C and 300°C, which is lower than the high temperature conditions required by traditional SCR systems. Low-temperature SCR systems use specially designed catalysts, usually containing some promoters, which can effectively catalyze the conversion of NOx into harmless nitrogen and water vapor at lower temperatures.

[0003] Vanadium titanium manganese cerium (VTM) catalyst is an important catalyst used in diesel vehicle exhaust treatment systems (vanadium titanium catalyst is the base catalyst, Mnox and ce0z are the second active ingredients), mainly used in low-temperature selective catalytic reduction (SCR) technology to reduce nitrogen oxide (NOx) emissions.

[0004] During the use of vanadium titanium manganese cerium catalysts, under the operating conditions of the diesel engine, especially at low load and cold start, water vapor and ash may accumulate on the surface of the vanadium titanium manganese cerium catalyst. Since the vanadium titanium manganese cerium catalyst usually exists in the form of solid particles, these substances will hinder the SCR reaction, reduce the available surface area of ​​the vanadium titanium manganese cerium catalyst, and reduce the catalytic efficiency.

[0005] In view of the above-mentioned related technologies, the inventors believe that the vanadium-titanium-manganese-cerium catalyst has the defect of accumulating water vapor and ash on the surface when in use. Therefore, a low-temperature SCR denitrification equipment is proposed to solve the above problem. Utility Model Content

[0006] In order to solve the problem of water vapor and ash accumulation on the surface of the vanadium-titanium-manganese-cerium catalyst during use, the present application provides a low-temperature SCR denitrification device.

[0007] The low-temperature SCR denitration equipment provided in this application adopts the following technical solution:

[0008] A low-temperature SCR denitrification device comprises a smoke exhaust pipe, a catalytic reaction smoke pipe is fixedly installed on the upper surface of the smoke exhaust pipe, a fixed baffle is symmetrically fixedly connected to the middle of one side of the inner wall of the catalytic reaction smoke pipe, a catalytic reaction chamber is arranged between the two fixed baffles, a plurality of smoke exhaust holes are penetrated through the upper surface of the fixed baffle, a screw is rotatably installed in the middle of one side of the inner wall of the catalytic reaction chamber, a servo motor is installed at one side of the screw that extends to the outside of the catalytic reaction smoke pipe, a movable block is sleeved on the outer surface of the screw, a rotating rod is rotatably installed in the middle of the front and rear ends of the movable block, a plurality of material shifting plates are fixedly installed on the outer surface of the rotating rod, and a limiting mechanism is also provided inside the catalytic reaction chamber for adjusting the rotating rod for rotation.

[0009] Preferably, the limiting mechanism comprises a limiting bracket, which is fixedly installed directly below the screw rod, a rack plate is symmetrically fixed to the top edge of the limiting bracket, and a gear is installed on one side edge of the outer surface of the rotating rod near the movable block.

[0010] Preferably, a plurality of fixing screws are fixedly installed on the lower bottom surface of the catalytic reaction smoke pipe, and a sealing clamp is sleeved on the outer surface of the fixing screw between the smoke exhaust pipe and the catalytic reaction smoke pipe, a filter is installed inside the sealing clamp, and a fastening nut is threadedly connected to the bottom of one side of the outer surface of the fixing screw through the smoke exhaust pipe.

[0011] Preferably, a threaded hole is provided through the middle of one side of the movable block, one side of the outer surface of the screw rod is located inside the threaded hole, the bottom of one side of the movable block is located inside the limiting bracket, and the movable block and the limiting bracket are coupled to each other.

[0012] Preferably, the bottom of one side of the outer surface of the gear moves close to the upper surface of the rack plate, and the gear and the rack plate are meshed with each other.

[0013] In summary, this application includes the following beneficial technical effects:

[0014] By placing the vanadium-titanium-manganese-cerium catalyst inside the catalytic reaction chamber, placing the sealing clamp between the smoke exhaust pipe and the catalytic reaction pipe, and using the fixing screw to cooperate with the fastening nut to fix the catalytic reaction pipe on the smoke exhaust pipe, rotating the screw to drive the movable block to reciprocate along the inside of the limit bracket, and causing the gear to rotate along the upper surface of the rack plate, the movable rotating rod drives multiple material shifting plates to shift the vanadium-titanium-manganese-cerium catalyst inside the catalytic reaction chamber, thereby quickly evaporating and removing the water vapor and dust accumulated on the surface of the vanadium-titanium-manganese-cerium catalyst; compared with the prior art, this scheme has the effect of facilitating the turning of the accumulated vanadium-titanium-manganese-cerium catalyst, thereby improving the overall utilization efficiency of the vanadium-titanium-manganese-cerium catalyst, and solving the problem of water vapor and ash accumulated on the surface of the vanadium-titanium-manganese-cerium catalyst affecting the catalytic reaction. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1It is a schematic diagram of the overall structure of the embodiment of the application;

[0016] Figure 2 is a schematic diagram of the structure of the sealing clamp ring in the embodiment of the application;

[0017] Figure 3 It is a schematic diagram of the structure of the limiting bracket in the application embodiment;

[0018] Figure 4 It is a structural schematic diagram of the material diverter plate in the application embodiment;

[0019] Explanation of the reference numerals: 1. exhaust pipe; 2. catalytic reaction pipe; 3. fixed baffle; 4. catalytic reaction chamber; 5. exhaust hole; 6. screw; 7. servo motor; 8. movable block; 9. rotating rod; 10. material removal plate; 11. gear; 12. limit bracket; 13. rack plate; 14. fixed screw; 15. sealing clamp; 16. filter screen; 17. fastening nut. DETAILED DESCRIPTION

[0020] The following is combined with Figure 1-4 This application is described in further detail.

[0021] The present application embodiment discloses a low temperature SCR denitration device. Figure 1-4 A low-temperature SCR denitrification device comprises a smoke exhaust pipe 1, a catalytic reaction smoke pipe 2 is fixedly installed on the upper surface of the smoke exhaust pipe 1, a fixed baffle 3 is symmetrically fixedly connected to the middle of one side of the inner wall of the catalytic reaction smoke pipe 2, a catalytic reaction chamber 4 is arranged between the two fixed baffles 3, a plurality of smoke exhaust holes 5 are penetrated through the upper surface of the fixed baffle 3, a screw rod 6 is rotatably installed in the middle of one side of the inner wall of the catalytic reaction chamber 4, a servo motor 7 is installed at one side of the screw rod 6 extending to the outside of the catalytic reaction smoke pipe 2, a movable block 8 is sleeved on the outer surface of the screw rod 6, a rotating rod 9 is rotatably installed in the middle of both ends of the movable block 8, a plurality of material shifting plates 10 are fixedly installed on the outer surface of the rotating rod 9, and a limiting mechanism is also arranged inside the catalytic reaction chamber 4 for adjusting the rotating rod 9 to rotate.

[0022] By placing the vanadium-titanium-manganese-cerium catalyst inside the catalytic reaction chamber 4, starting the servo motor 7 to drive the screw 6 to rotate, so that the rotating screw 6 can reciprocate along the outer surface of the movable block 8, and the limiting bracket 12 can limit the movable block 8 to keep the movable block 8 in a stable active state, so that the movable block 8 drives the rotating rod 9 and the material transfer plate 10 to move synchronously, and then the vanadium-titanium-manganese-cerium catalyst inside the catalytic reaction chamber 4 is turned over, which helps to increase the overall catalytic reaction effect of the vanadium-titanium-manganese-cerium catalyst.

[0023] Reference Figure 3 and Figure 4The limiting mechanism includes a limiting bracket 12, which is fixedly installed just below the screw rod 6. A rack plate 13 is symmetrically fixed to the top edge of the limiting bracket 12. A gear 11 is installed on one edge of the outer surface of the rotating rod 9 near the movable block 8. A threaded hole is opened through the middle of one side of the movable block 8. One side of the outer surface of the screw rod 6 is located inside the threaded hole. The bottom of one side of the movable block 8 is located inside the limiting bracket 12. The movable block 8 and the limiting bracket 12 are coupled to each other. The bottom of one side of the outer surface of the gear 11 moves close to the upper surface of the rack plate 13, and the gear 11 and the rack plate 13 are meshed with each other.

[0024] The movable block 8 drives the gear 11 to rotate along the upper surface of the rack plate 13, thereby rotating the rotating rod 9. The rotating rotating rod 9 drives multiple material shifting plates 10 to move, so that the reciprocating material shifting plates 10 rotate at the same time, thereby improving the overall flipping effect of the material shifting plate 10 on the vanadium-titanium-manganese-cerium catalyst, thereby reflecting the overall utilization efficiency of the vanadium-titanium-manganese-cerium catalyst.

[0025] Reference Figure 2 A plurality of fixing screws 14 are fixedly installed on the lower bottom surface of the catalytic reaction smoke pipe 2. A sealing clamp 15 is sleeved on the outer surface of the fixing screw 14 between the smoke exhaust pipe 1 and the catalytic reaction smoke pipe 2. A filter screen 16 is installed inside the sealing clamp 15. The bottom of one side of the outer surface of the fixing screw 14 passes through the smoke exhaust pipe 1 and is threadedly connected with a fastening nut 17. By placing the sealing clamp 15 between the smoke exhaust pipe 1 and the catalytic reaction smoke pipe 2, and sleeved on the outer surface of the fixing screw 14, the fixing screw 14 is inserted into the upper surface of the smoke exhaust pipe 1, and the fastening nut 17 is rotated to be threadedly connected to the outer surface of the fixing screw 14, so that the fixing screw 14 cooperates with the fastening nut 17 to fix the catalytic reaction smoke pipe 2 on the smoke exhaust pipe 1, and at the same time, the sealing clamp 15 is sealed and installed between the smoke exhaust pipe 1 and the catalytic reaction smoke pipe 2, which reflects the overall filtering effect of dust in the smoke of the smoke exhaust pipe 1.

[0026] The implementation principle of a low-temperature SCR denitration device in the embodiment of the present application is as follows: by placing a vanadium-titanium-manganese-cerium catalyst inside the catalytic reaction chamber 4, placing a sealing clamp ring 15 between the smoke exhaust pipe 1 and the catalytic reaction smoke pipe 2, and sleeve the sealing clamp ring 15 on the outer surface of the fixed screw 14, inserting the fixed screw 14 on the upper surface of the smoke exhaust pipe 1, rotating the fastening nut 17 to be threadedly connected to the outer surface of the fixed screw 14, so that the fixed screw 14 cooperates with the fastening nut 17 to install and fix the catalytic reaction smoke pipe 2 on the smoke exhaust pipe 1, and at the same time, the sealing clamp ring 15 is sealed and installed between the smoke exhaust pipe 1 and the catalytic reaction smoke pipe 2, so that the filter 16 filters the dust in the smoke transported by the smoke exhaust pipe 1, and at the same time, the servo motor 7 is started to drive the screw 6 to rotate, and the input end of the servo motor 7 power supply is connected to the output end of the external power supply. The electrical connection allows the rotating screw 6 to reciprocate along the outer surface of the movable block 8, and the limiting bracket 12 limits and supports the movable block 8, keeping the movable block 8 in a stable active state, and allowing the movable block 8 to drive the gear 11 to rotate along the upper surface of the rack plate 13, thereby rotating the rotating rod 9, and the rotating rotating rod 9 drives multiple material shifting plates 10 to move, thereby shifting the vanadium-titanium-manganese-cerium catalyst inside the catalytic reaction chamber 4 to turn over the material, and quickly evaporate and remove the water vapor and dust accumulated on the surface of the vanadium-titanium-manganese-cerium catalyst; compared with the prior art, the present scheme has the effect of facilitating the turning over of the accumulated vanadium-titanium-manganese-cerium catalyst, improving the overall utilization efficiency of the vanadium-titanium-manganese-cerium catalyst, and solving the problem of water vapor and ash accumulated on the surface of the vanadium-titanium-manganese-cerium catalyst affecting the catalytic reaction.

[0027] Finally, a few points should be explained: First, in the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, which may refer to mechanical connection or electrical connection, or internal communication between two components, or direct connection. "upper", "lower", "left", "right", etc. are only used to indicate relative positional relationships. When the absolute position of the object being described changes, the relative positional relationship may change;

[0028] Secondly: In the drawings of the embodiments disclosed in the present utility model, only the structures related to the embodiments disclosed in the present utility model are involved, and other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of the present utility model can be combined with each other;

[0029] Finally: The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present utility model should be included in the protection scope of the present utility model.

[0030] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A low-temperature SCR denitration device, comprising a smoke exhaust pipe (1), characterized in that: A catalytic reaction smoke pipe (2) is fixedly mounted on the upper surface of the smoke exhaust pipe (1), a fixed baffle (3) is symmetrically fixedly mounted in the middle of one side of the inner wall of the catalytic reaction smoke pipe (2), a catalytic reaction chamber (4) is arranged between the two fixed baffles (3), a plurality of smoke exhaust holes (5) are through-opened on the upper surface of the fixed baffle (3), a screw rod (6) is rotatably mounted in the middle of one side of the inner wall of the catalytic reaction chamber (4), a servo motor (7) is mounted on one side of the screw rod (6) extending to the outside of the catalytic reaction smoke pipe (2), a movable block (8) is sleeved on the outer surface of the screw rod (6), a rotating rod (9) is rotatably mounted in the middle of both front and rear ends of the movable block (8), a plurality of material shifting plates (10) are fixedly mounted on the outer surface of the rotating rod (9), and a limiting mechanism is also provided inside the catalytic reaction chamber (4) for adjusting the rotating rod (9) to rotate.

2. A low-temperature SCR denitration equipment according to claim 1, characterized in that: The limiting mechanism comprises a limiting bracket (12), the limiting bracket (12) is fixedly installed directly below the screw rod (6), a rack plate (13) is symmetrically fixedly connected to the top edge of the limiting bracket (12), and a gear (11) is installed on one side edge of the outer surface of the rotating rod (9) near the movable block (8).

3. A low-temperature SCR denitration equipment according to claim 1, characterized in that: A plurality of fixing screws (14) are fixedly mounted on the bottom surface of the catalytic reaction smoke pipe (2); a sealing clamp (15) is sleeved on the outer surface of the fixing screw (14) between the smoke exhaust pipe (1) and the catalytic reaction smoke pipe (2); a filter screen (16) is installed inside the sealing clamp (15); and a fastening nut (17) is threadedly connected to the bottom of one side of the outer surface of the fixing screw (14) through the smoke exhaust pipe (1).

4. A low-temperature SCR denitration equipment according to claim 2, characterized in that: A threaded hole is provided in the middle of one side of the movable block (8), one side of the outer surface of the screw rod (6) is located inside the threaded hole, and the bottom of one side of the movable block (8) is located inside the limiting bracket (12), and the movable block (8) and the limiting bracket (12) are coupled to each other.

5. A low-temperature SCR denitration equipment according to claim 2, characterized in that: The bottom of one side of the outer surface of the gear (11) moves close to the upper surface of the rack plate (13), and the gear (11) and the rack plate (13) are meshed with each other.

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