Low-temperature SCR (Selective Catalytic Reduction) denitration flue gas heat exchanger capable of reducing flow speed

Abstract

The utility model relates to the technical field of flue gas heat exchangers, and discloses a low-temperature SCR (selective catalytic reduction) denitration flue gas heat exchanger capable of reducing flow velocity, which comprises a shell, a plurality of groups of rotating columns are rotatably connected in the shell, the surfaces of the rotating columns are fixedly connected with baffles, and the tops of the rotating columns are sleeved with transmission components. Wherein the top of one rotating column is fixedly connected with a driving assembly, the inner wall of the shell is rotatably connected with a pushing assembly, the surface of the pushing assembly is in threaded connection with a fixing block, the bottom of the fixing block is fixedly connected with a supporting frame, and the surface of the supporting frame is fixedly connected with a plurality of cleaning clamps. The transmission assembly comprises a rotating gear ring connected to the top of the rotating column in a sleeving mode. According to the low-temperature SCR denitration flue gas heat exchanger capable of reducing the flow speed, through the arrangement of the transmission assembly and the driving assembly, the effect of adjusting and reducing the flow speed is achieved, the residence time of flue gas is prolonged, denitration reaction conditions are optimized, the denitration efficiency is further improved, and energy consumption is reduced.

Description

Technical Field

[0001] This utility model relates to the field of flue gas heat exchanger technology, and in particular to a low-temperature SCR denitrification flue gas heat exchanger that can reduce flow rate. Background Technology

[0002] The function of a flue gas heat exchanger is to recover heat from flue gas and use that heat to heat other process fluids (such as feedwater and air), thereby improving the system's energy efficiency. A low-temperature SCR denitrification flue gas heat exchanger that can reduce flow rate is a device used in flue gas denitrification processes, especially in low-temperature environments, combining flue gas heat exchange and denitrification technologies. It can effectively reduce flue gas velocity, improve the efficiency of the denitrification reaction, and simultaneously recover some heat to reduce energy consumption.

[0003] Existing low-temperature SCR denitrification flue gas heat exchangers that can reduce flow rate are not easy to clean on the surface of the heat exchange tubes in actual use. The accumulation of impurities on the surface of the heat exchange tubes can easily affect the heat exchange effect.

[0004] A search of existing patents revealed a flue gas heat exchanger (publication number: CN212157228U), which includes a furnace body and an organic heat carrier tube assembly. The furnace body contains a flue gas inlet, a dust settling chamber, a radiation chamber, a convection chamber, and a flue gas outlet, all connected in sequence. The organic heat carrier tube assembly includes an inlet manifold, a convection heat exchange coil, a radiation chamber furnace tube, a radiation chamber roof tube, and an outlet manifold, all connected in sequence. The convection heat exchange coil is located within the convection chamber, while the radiation chamber furnace tube and the radiation chamber roof tube are located within the radiation chamber. This invention allows the flue gas to enter the convection chamber after passing through the dust settling chamber and the radiation chamber. This solves the problem of ultra-high temperature damage to the organic heat carrier inside the convection heat exchange coil caused by the high heat load of ultra-high temperature flue gas, and also solves the problem of dust blockage and wear on the convection heat exchange coil caused by the large amount of dust carried by the high-temperature flue gas.

[0005] While the aforementioned patent addresses the ultra-high temperature damage to the organic heat carrier inside the convective heat exchanger caused by the high heat load of ultra-high temperature flue gas on the convective heat exchanger coil, and also solves the problem of dust blockage and wear on the convective heat exchanger coil caused by the large amount of dust carried by the high temperature flue gas, it is not convenient to adjust and reduce the flow rate, and it is difficult to increase the residence time of the flue gas. Utility Model Content

[0006] (a) Technical problems to be solved

[0007] The purpose of this invention is to provide a low-temperature SCR denitrification flue gas heat exchanger that can reduce flow rate, thereby solving the problems mentioned in the background art, such as the inconvenience of adjusting and reducing flow rate and the difficulty in increasing flue gas residence time.

[0008] (II) Technical Solution

[0009] To achieve the above objectives, this utility model provides the following technical solution: a low-temperature SCR denitrification flue gas heat exchanger that can reduce flow rate, comprising a shell, several sets of rotating columns rotatably connected inside the shell, baffles fixedly connected to the surface of each rotating column, a transmission assembly sleeved on the top of each rotating column, a drive assembly fixedly connected to the top of one set of rotating columns, a push assembly rotatably connected to the inner wall of the shell, a fixing block threadedly connected to the surface of the push assembly, a support frame fixedly connected to the bottom of the fixing block, several sets of cleaning clamps fixedly connected to the surface of the support frame, the transmission assembly including a rotating gear ring sleeved on the top of the rotating column, a rack meshing on the surface of the rotating gear ring; the drive assembly including a drive motor fixedly connected to the top of the rotating column, a motor housing sleeved on the surface of the drive motor; the push assembly including a threaded rod rotatably connected to the inner wall of the shell, an output motor fixedly connected to one end of the threaded rod, a protective shell sleeved on the surface of the output motor.

[0010] As a further embodiment of this utility model, two sets of positioning blocks are fixedly connected to the top and bottom of the support frame, and sliding rods are slidably connected inside the positioning blocks. The sliding rods help to maintain stable movement.

[0011] As a further embodiment of this utility model, a heat exchange tube is provided inside the outer shell, and the cleaning clamp is slidably connected to the surface of the heat exchange tube. The heat exchange tube facilitates heat exchange.

[0012] As a further embodiment of this utility model, a collection box is fixedly connected to the bottom of the outer shell, and a drawer is slidably connected inside the collection box. A handle is fixedly connected to the front of the drawer, which facilitates pulling the drawer.

[0013] As a further embodiment of this utility model, a front cover is fixedly connected to the front of the outer shell, and a connecting pipe is fixedly connected to the front of the front cover. The connecting pipe serves to connect the flue gas duct.

[0014] As a further embodiment of this utility model, both ends of the heat exchange tube are connected to a connecting pipe, and the surface of the connecting pipe is connected to an external pipe. The external pipe serves to connect to an external pipeline.

[0015] As a further embodiment of this utility model, a support foot is fixedly connected to the bottom of the outer shell, and a mounting plate is fixedly connected to the bottom of the support foot. The mounting plate facilitates fixed installation.

[0016] (III) Beneficial Effects

[0017] This invention provides a low-temperature SCR denitrification flue gas heat exchanger that can reduce flow rate, and has the following beneficial effects:

[0018] 1. This low-temperature SCR denitrification flue gas heat exchanger, which can reduce flow rate, utilizes a transmission and drive assembly. During operation, based on the required flue gas flow rate, the drive motor is activated, causing one set of rotating columns to rotate. This rotating column then drives a rotating gear ring, which in turn drives a meshing rack belt to rotate. This causes other rotating gear rings on the rack belt to rotate simultaneously. Consequently, multiple sets of rotating columns cause the baffles to deflect at different angles, thereby adjusting and reducing the flow rate, increasing the residence time of the flue gas, optimizing the denitrification reaction conditions, further improving denitrification efficiency, and reducing energy consumption.

[0019] 2. This low-temperature SCR denitrification flue gas heat exchanger, which can reduce flow rate, utilizes a push assembly, support frame, and cleaning clamp. During use, impurities accumulate on the surface of the heat exchange tubes due to prolonged contact with the flue gas. This triggers the output motor, which drives the threaded rod to rotate. The threaded rod rotates within the fixed block, pushing the fixed block to move. The fixed block then moves the support frame, and the positioning blocks at the four corners of the support frame slide on the sliding rod for stability. This allows the cleaning clamp to scrape the surface of the heat exchange tubes, effectively cleaning the surface and preventing impurities from accumulating and affecting heat exchange efficiency. It also extends the service life of the low-temperature SCR denitrification flue gas heat exchanger. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0021] Figure 2 This is a schematic diagram of the disassembled structure of this utility model;

[0022] Figure 3 This is a schematic diagram of the transmission component and drive component of this utility model;

[0023] Figure 4 This is a schematic diagram of the push component, support frame, and cleaning clamp structure of this utility model.

[0024] In the diagram: 1. Outer shell; 2. Rotating column; 3. Baffle; 4. Transmission assembly; 401. Rotating gear ring; 402. Rack and belt; 5. Drive assembly; 501. Drive motor; 502. Motor housing; 6. Push assembly; 601. Threaded rod; 602. Output motor; 603. Protective shell; 7. Fixing block; 8. Support frame; 9. Cleaning clamp; 10. Positioning block; 11. Sliding rod; 12. Heat exchange tube; 13. Collection box; 14. Drawer; 15. Handle; 16. Front cover; 17. Connecting pipe; 18. Connecting pipe; 19. External pipe; 20. Support leg; 21. Mounting plate. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0026] Please see Figures 1 to 4 This utility model provides a technical solution: a low-temperature SCR denitrification flue gas heat exchanger that can reduce flow rate, including a shell 1. Several sets of rotating columns 2 are rotatably connected inside the shell 1. Baffles 3 are fixedly connected to the surface of each rotating column 2. A transmission assembly 4 is sleeved on the top of each rotating column 2. Through the arrangement of the transmission assembly 4 and the drive assembly 5, the flow rate is adjusted and reduced, increasing the residence time of the flue gas, optimizing the denitrification reaction conditions, further improving denitrification efficiency, and reducing energy consumption. The top of one set of rotating columns 2 is fixedly connected to the drive assembly 5, and a pushing assembly 6 is rotatably connected to the inner wall of the shell 1. Through the arrangement of the pushing assembly 6, the support frame 8, and the cleaning clamp 9, the surface of the heat exchange tubes 12 is cleaned, preventing the accumulation of impurities on the surface of the heat exchange tubes 12. The accumulation affects the heat exchange effect and also increases the service life of the low-temperature SCR denitrification flue gas heat exchanger. The surface of the driving component 6 is threadedly connected to the fixing block 7, the bottom of the fixing block 7 is fixedly connected to the support frame 8, and the surface of the support frame 8 is fixedly connected to several sets of cleaning clamps 9. The transmission component 4 includes a rotating gear ring 401 sleeved on the top of the rotating column 2, and the surface of the rotating gear ring 401 is meshed with a rack belt 402. The drive component 5 includes a drive motor 501 fixedly connected to the top of the rotating column 2, and the surface of the drive motor 501 is sleeved with a motor housing 502. The driving component 6 includes a threaded rod 601 rotatably connected to the inner wall of the outer shell 1, one end of the threaded rod 601 is fixedly connected to the output motor 602, and the surface of the output motor 602 is sleeved with a protective shell 603.

[0027] Two sets of positioning blocks 10 are fixedly connected to the top and bottom of the support frame 8. Sliding rods 11 are slidably connected inside the positioning blocks 10. The sliding rods 11 play a role in maintaining stable movement.

[0028] The outer casing 1 has a heat exchange tube 12 inside, and the cleaning clamp 9 is slidably connected to the surface of the heat exchange tube 12. The heat exchange tube 12 facilitates heat exchange.

[0029] A collection box 13 is fixedly connected to the bottom of the outer casing 1. A drawer 14 is slidably connected inside the collection box 13. A handle 15 is fixedly connected to the front of the drawer 14. The handle 15 facilitates the pulling of the drawer 14.

[0030] A front cover 16 is fixedly connected to the front of the outer casing 1, and a connecting pipe 17 is fixedly connected to the front of the front cover 16. The connecting pipe 17 serves to connect the flue gas duct.

[0031] Both ends of the heat exchange tube 12 are connected to a connecting pipe 18, and an external connecting pipe 19 is connected to the surface of the connecting pipe 18. The external connecting pipe 19 serves to connect to an external pipeline.

[0032] The bottom of the outer casing 1 is fixedly connected to a support leg 20, and the bottom of the support leg 20 is fixedly connected to a mounting plate 21. The mounting plate 21 facilitates fixed installation.

[0033] In this invention, the working steps of the device are as follows:

[0034] First step: When in use, start the drive motor 501 according to the required flue gas flow rate, so that the drive motor 501 drives one of the rotating columns 2 to rotate, and then the rotating column 2 drives the rotating gear ring 401 to rotate, and the rotating gear ring 401 drives the meshing rack belt 402 to rotate, so that the other rotating gear rings 401 on the rack belt 402 rotate at the same time, and then the multiple sets of rotating columns 2 drive the baffle 3 to deflect by an angle;

[0035] Second step: During use, due to the long-term contact between the heat exchange tube 12 and the flue gas surface, impurities will accumulate, which will then start the output motor 602, drive the threaded rod 601 to rotate, and make the threaded rod 601 rotate inside the fixed block 7.

[0036] Third step: Use the rotation of the threaded rod 601 to push the fixed block 7 to move, so that the fixed block 7 drives the support frame 8 to move. The positioning blocks 10 on the four corners of the support frame 8 slide on the sliding rod 11 to maintain stability, so that the cleaning clamp 9 scrapes the surface of the heat exchange tube 12.

[0037] It should be noted that the device structure and accompanying drawings of this utility model mainly describe the principle of this utility model. In terms of the technical aspects of this design principle, the setting of the power mechanism, power supply system and control system of the device is not fully described. However, under the premise that those skilled in the art understand the principle of the above utility model, the specific details of its power mechanism, power supply system and control system can be clearly understood. The control method in the application document is automatic control through a controller. The control circuit of the controller can be implemented by those skilled in the art through simple programming.

[0038] All standard parts used can be purchased from the market, and can be customized according to the instructions and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the existing technology. The machinery, parts and equipment adopt conventional models in the existing technology, and the structure and principle of the components known to those skilled in the art can be known by those skilled in the art through technical manuals or conventional experimental methods.

[0039] 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 low-temperature SCR denitration flue gas heat exchanger capable of reducing flow rate, comprising a shell (1), characterized in that: The inside of the shell (1) is rotatably connected with several groups of rotating columns (2), the surface of the rotating column (2) is fixedly connected with a baffle (3), the top of the rotating column (2) is sleeved with a transmission assembly (4), one group of the top of the rotating column (2) is fixedly connected with a driving assembly (5), the inner wall of the shell (1) is rotatably connected with a pushing assembly (6), the surface of the pushing assembly (6) is threadedly connected with a fixed block (7), the bottom of the fixed block (7) is fixedly connected with a support frame (8), the surface of the support frame (8) is fixedly connected with several groups of cleaning clamps (9), The transmission assembly (4) comprises a rotating gear ring (401) sleeved on the top of the rotating column (2), and the surface of the rotating gear ring (401) is engaged with a rack belt (402); The driving assembly (5) comprises a driving motor (501) fixedly connected to the top of the rotating column (2), and the surface of the driving motor (501) is sleeved with a motor shell (502); The pushing assembly (6) comprises a threaded rod (601) rotatably connected to the inner wall of the shell (1), one end of the threaded rod (601) is fixedly connected with an output motor (602), and the surface of the output motor (602) is sleeved with a protective shell (603).

2. The low-temperature SCR denitration flue gas heat exchanger capable of reducing flow rate according to claim 1, characterized in that: The top and bottom of the support frame (8) are fixedly connected with two groups of positioning blocks (10), and the inside of the positioning block (10) is slidably connected with a sliding rod (11).

3. The low-temperature SCR denitration flue gas heat exchanger capable of reducing flow rate according to claim 1, characterized in that: The inside of the shell (1) is provided with a heat exchange pipe (12), and the cleaning clamp (9) is slidably connected to the surface of the heat exchange pipe (12).

4. The low-temperature SCR denitration flue gas heat exchanger capable of reducing flow rate according to claim 1, characterized in that: The bottom of the shell (1) is fixedly connected with a collecting box (13), the inside of the collecting box (13) is slidably connected with a drawer (14), and the front surface of the drawer (14) is fixedly connected with a handle (15).

5. The low-temperature SCR denitration flue gas heat exchanger capable of reducing flow rate according to claim 1, characterized in that: The front surface of the shell (1) is fixedly connected with a front cover (16), and the front surface of the front cover (16) is fixedly connected with a connecting pipe (17).

6. The low-temperature SCR denitration flue gas heat exchanger capable of reducing flow rate according to claim 3, characterized in that: Both ends of the heat exchange pipe (12) are throughly connected with a communication pipe (18), and the surface of the communication pipe (18) is throughly connected with an external pipe (19).

7. The low-temperature SCR denitration flue gas heat exchanger capable of reducing flow rate according to claim 1, characterized in that: The bottom of the shell (1) is fixedly connected with a support leg (20), and the bottom of the support leg (20) is fixedly connected with a mounting plate (21).

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