A multi-stage filter combined with a heat exchanger type flue gas treatment structure

Abstract

The utility model belongs to flue gas purification and waste heat recovery technical field, concretely relates to a kind of multistage filter and heat exchanger combined type flue gas treatment structure, including heat exchanger and multistage filter unit, and the gas outlet of heat exchanger rear end and the gas inlet of multistage filter unit front end are linked, and heat exchanger includes and the heat exchanger shell that multistage filter unit is linked, the outside of heat exchanger shell is provided with cooling medium feed pipe and cooling medium discharge pipe, and multiple heat exchange pipes are fixedly connected between cooling medium feed pipe and cooling medium discharge pipe, the inside of heat exchanger shell is provided with heat exchange zone, and heat exchanger shell is provided with and the space adjusting piece that heat exchange zone is adapted is set. The utility model can make the multiple heat exchange fins inside heat exchanger shell can be evenly contacted with flue gas, relatively uniform heat exchange is carried out, and local overheating or supercooling phenomenon is reduced.

Description

Technical Field

[0001] This utility model belongs to the field of flue gas purification and waste heat recovery technology, specifically relating to a flue gas treatment structure that combines a multi-stage filter and a heat exchanger. Background Technology

[0002] In the field of industrial flue gas purification, heat exchangers and filters are often used in combination to achieve both waste heat recovery and pollutant removal. The flue gas is first heated by the heat exchanger and then filtered. The heat exchange first reduces the flue gas temperature, minimizing damage to the multi-stage filters caused by high temperatures. It also reduces the stickiness of dust in the high-temperature flue gas, reducing the phenomenon of dust adhering to the filter media and affecting the filtration effect. After the flue gas is cooled down by heat exchange, its volume is reduced, and the flue gas velocity is reduced at the same flow rate, which is conducive to the multi-stage filters capturing particulate pollutants such as dust better and improving filtration efficiency.

[0003] However, in the existing technology, the heat exchange zone size of the heat exchanger is fixed and cannot be dynamically adjusted according to the flue gas flow rate, resulting in uneven heat exchange and easy occurrence of local overheating or undercooling. Utility Model Content

[0004] The purpose of this invention is to provide a flue gas treatment structure that combines a multi-stage filter and a heat exchanger, which enables multiple heat exchange fins inside the heat exchanger shell to contact the flue gas evenly, resulting in more uniform heat exchange and reducing local overheating or overcooling.

[0005] The specific technical solution adopted by this utility model is as follows:

[0006] A flue gas treatment structure combining a multi-stage filter and a heat exchanger includes a heat exchanger and a multi-stage filter unit. The outlet at the rear end of the heat exchanger is connected to the inlet at the front end of the multi-stage filter unit. The heat exchanger includes a heat exchanger shell connected to the multi-stage filter unit. A cooling medium inlet pipe and a cooling medium outlet pipe are provided on the outer side of the heat exchanger shell. Multiple heat exchange tubes are fixedly connected between the cooling medium inlet pipe and the cooling medium outlet pipe. A heat exchange zone is provided inside the heat exchanger shell. A space adjustment component adapted to the heat exchange zone is provided on the heat exchanger shell. Multiple straight tubes penetrating the heat exchanger shell and the heat exchange zone are provided on the heat exchange tubes. Multiple heat exchange fins located inside the heat exchange zone are slidably connected to the outer side of the straight tubes.

[0007] Furthermore, the space adjustment component includes two additional housings fixedly connected to both sides of the heat exchanger housing, an electric push rod fixedly connected to the outer side of the additional housing, a filling block slidably connected to the piston rod of the electric push rod inside the additional housing, the filling block slidably connected to the outer side of multiple straight tubes, and the heat exchange zone is the space between the two filling blocks.

[0008] Furthermore, a magnetic reset assembly is provided between two adjacent heat exchange fins located on the outer side of the same straight tube body. The magnetic reset assembly includes a magnet fixedly connected to the heat exchange fin, and the magnets on the two adjacent heat exchange fins repel each other magnetically.

[0009] Furthermore, a first groove is formed on the periphery of the filling block, a first sealing ring is fixedly connected inside the first groove, a hollow cavity is formed inside the first sealing ring, and an air pump connected to the hollow cavity is fixedly connected to the outside of the additional housing.

[0010] Furthermore, the filling block has multiple sliding holes, and the filling block is slidably connected to the outside of the straight tube body through the sliding holes. A second groove is provided inside the filling block and outside the sliding holes. A second sealing ring located outside the straight tube body is fixedly connected inside the second groove. A hollow cavity communicating with the air pump is provided inside the second sealing ring.

[0011] The technical effects achieved by this utility model are as follows:

[0012] This utility model discloses a multi-stage filter and heat exchanger combined flue gas treatment structure. By adjusting the size of the heat exchange zone, the flue gas can be evenly distributed inside the heat exchanger shell. This allows multiple heat exchange fins inside the heat exchanger shell to have uniform contact with the flue gas, resulting in more uniform heat exchange and reducing local overheating or overcooling. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0014] Figure 2 This is a cross-sectional structural diagram of the heat exchanger of this utility model;

[0015] Figure 3 This is a cross-sectional structural diagram of the filling block of this utility model.

[0016] The attached diagram lists the components represented by each number as follows:

[0017] 1. Heat exchanger shell; 2. Multi-stage filter unit; 3. Cooling medium inlet pipe; 4. Cooling medium outlet pipe; 5. Heat exchange tube; 6. Straight tube body; 7. Heat exchange fins; 8. Magnet; 9. Electric push rod; 10. Packing block; 11. Air pump; 12. First groove; 13. First sealing ring; 14. Sliding hole; 15. Second groove; 16. Second sealing ring; 17. Additional shell. Detailed Implementation

[0018] To make the objectives and advantages of this utility model clearer, the following detailed description is provided in conjunction with embodiments. It should be understood that the following text is merely used to describe one or more specific embodiments of this utility model and does not strictly limit the scope of protection specifically claimed by this utility model.

[0019] like Figures 1-3 As shown, a multi-stage filter and heat exchanger combined flue gas treatment structure includes a heat exchanger and a multi-stage filter unit 2. The outlet at the rear end of the heat exchanger is connected to the inlet at the front end of the multi-stage filter unit 2, so that the flue gas can first exchange heat through the heat exchanger and then be filtered by the multi-stage filter unit 2. The heat exchange first can reduce the flue gas temperature, reduce the damage caused by high temperature to the material of the multi-stage filter unit 2, and at the same time reduce the stickiness of dust in the high-temperature flue gas, reducing the phenomenon of dust adhering to the filter material and affecting the filtration effect. After the flue gas is cooled down by heat exchange, its volume is reduced, and the flue gas velocity is reduced at the same flow rate, which is conducive to the multi-stage filter unit 2 to better capture particulate pollutants such as dust and improve the filtration efficiency.

[0020] The core of this technical solution lies in the improvement of the heat exchanger's structure, specifically as follows: Figures 1-2 As shown, the heat exchanger includes a heat exchanger shell 1 connected to the multi-stage filter unit 2. A cooling medium inlet pipe 3 and a cooling medium outlet pipe 4 are provided on the outside of the heat exchanger shell 1. Multiple heat exchange pipes 5 are fixedly connected between the cooling medium inlet pipe 3 and the cooling medium outlet pipe 4. The cold water medium enters through the cooling medium inlet pipe 3, then enters the interior of the cooling medium outlet pipe 4 through the heat exchange pipes 5, and then exits through the cooling medium outlet pipe 4. During the flow of the cold water medium, the flue gas flowing inside the heat exchanger shell 1 and the cold water medium complete the heat exchange.

[0021] The heat exchanger shell 1 has a heat exchange zone inside. The heat exchanger shell 1 is equipped with a space adjustment component adapted to the heat exchange zone to adjust the size of the heat exchange zone. By adjusting the size of the heat exchange zone through the space adjustment component, the size of the heat exchange zone can be made proportional to the amount of flue gas, so that the flue gas is evenly distributed inside the heat exchanger shell 1. The heat exchange tube 5 is equipped with multiple straight tubes 6 that penetrate the heat exchanger shell 1 and the heat exchange zone. Multiple heat exchange fins 7 located inside the heat exchange zone are slidably connected to the outside of the straight tubes 6. Since the flue gas can be evenly distributed inside the heat exchanger shell 1 by adjusting the size of the heat exchange zone, the multiple heat exchange fins 7 inside the heat exchanger shell 1 can evenly contact the flue gas, perform heat exchange more evenly, and reduce local overheating or overcooling.

[0022] Specifically, the space adjustment component includes two auxiliary housings 17 fixedly connected to both sides of the heat exchanger housing 1. An electric push rod 9 is fixedly connected to the outside of the auxiliary housing 17. The piston rod of the electric push rod 9 is fixedly connected to a filling block 10 that is slidably connected inside the auxiliary housing 17. The filling block 10 is slidably connected to the outside of multiple straight tubes 6. The heat exchange zone is the space between the two filling blocks 10. By activating the electric push rod 9 to move the filling block 10, the size of the heat exchange zone can be adjusted. The adjustment method is relatively simple.

[0023] In order to automatically adjust the position of the magnet 8 so that the magnet 8 is evenly distributed inside the heat exchange zone, a magnetic reset group is set between two adjacent heat exchange fins 7 located on the outside of the same straight tube body 6. The heat exchange fins 7 can be adjusted by the magnetic force between them.

[0024] The magnetic reset assembly includes a magnet 8 fixedly connected to the heat exchange fin 7. The magnets 8 on two adjacent heat exchange fins 7 repel each other magnetically. The magnetic force between the two magnets 8 can push the heat exchange fin 7 to reset. Another magnet 8 that repels the magnets 8 on the heat exchange fin 7 can also be fixedly connected to the side of the filling block 10, so that a certain gap is maintained between the heat exchange fin 7 closest to the filling block 10 and the filling block 10.

[0025] To maintain airtightness and reduce the entry of flue gas into the auxiliary housing 17, this technical solution provides a first groove 12 around the periphery of the filling block 10. A first sealing ring 13 is fixedly connected inside the first groove 12, and a hollow cavity is formed inside the first sealing ring 13. An air pump 11 connected to the hollow cavity is fixedly connected to the outside of the auxiliary housing 17. When the filling block 10 is moved, the air pressure inside the first sealing ring 13 is reduced by the air pump 11, which causes the rubber first sealing ring 13 to contract, reducing the friction between the first sealing ring 13 and the heat exchanger housing 1 and reducing friction damage. After the movement is completed, the air pressure inside the first sealing ring 13 is increased by the air pump 11, causing the first sealing ring 13 to expand in volume, which increases the airtightness between the inner wall of the heat exchanger housing 1 and the first sealing ring 13.

[0026] Meanwhile, the filler block 10 has multiple sliding holes 14. The filler block 10 is slidably connected to the outside of the straight tube 6 through the sliding holes 14. A second groove 15 is provided inside the filler block 10 and outside the sliding holes 14. A second sealing ring 16 located outside the straight tube 6 is fixedly connected inside the second groove 15. A hollow cavity connected to the air pump 11 is provided inside the second sealing ring 16. When the filler block 10 is moved, the air pressure inside the second sealing ring 16 is reduced by the air pump 11, which causes the rubber second sealing ring 16 to shrink, reducing the friction between the second sealing ring 16 and the straight tube 6 and reducing friction damage. After the movement is completed, the air pressure inside the second sealing ring 16 is increased by the air pump 11, which causes the second sealing ring 16 to expand in volume, thereby increasing the sealing between the straight tube 6 and the second sealing ring 16.

[0027] Here, the filling block 10 is provided with an air guide pipe that is connected to the first sealing ring 13 and the second sealing ring 16, and the air pump 11 is connected to the air guide pipe.

[0028] The above description is merely a preferred embodiment of this utility model. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of this utility model, and these improvements and modifications should also be considered within the scope of protection of this utility model. Structures, devices, and operating methods not specifically described or explained in this utility model, unless otherwise specified or limited, shall be implemented using conventional methods in the field.

Claims

1. A flue gas treatment structure combining a multi-stage filter and a heat exchanger, characterized in that: The device includes a heat exchanger and a multi-stage filter unit (2). The outlet at the rear end of the heat exchanger is connected to the inlet at the front end of the multi-stage filter unit (2). The heat exchanger includes a heat exchanger shell (1) connected to the multi-stage filter unit (2). A cooling medium inlet pipe (3) and a cooling medium outlet pipe (4) are provided on the outside of the heat exchanger shell (1). Multiple heat exchange tubes (5) are fixedly connected between the cooling medium inlet pipe (3) and the cooling medium outlet pipe (4). A heat exchange zone is provided inside the heat exchanger shell (1). A space adjustment component adapted to the heat exchange zone is provided on the heat exchanger shell (1). Multiple straight tubes (6) penetrating the heat exchanger shell (1) and the heat exchange zone are provided on the heat exchange tubes (5). Multiple heat exchange fins (7) located inside the heat exchange zone are slidably connected to the outside of the straight tubes (6).

2. The flue gas treatment structure combining a multi-stage filter and a heat exchanger according to claim 1, characterized in that: The space adjustment component includes two additional housings (17) fixedly connected to both sides of the heat exchanger housing (1). An electric push rod (9) is fixedly connected to the outside of the additional housing (17). The piston rod of the electric push rod (9) is fixedly connected to a filling block (10) slidably connected inside the additional housing (17). The filling block (10) is slidably connected to the outside of multiple straight tubes (6). The heat exchange zone is the space between the two filling blocks (10).

3. The flue gas treatment structure combining a multi-stage filter and a heat exchanger according to claim 2, characterized in that: A magnetic reset group is provided between two adjacent heat exchange fins (7) located on the outside of the same straight tube body (6). The magnetic reset group includes a magnet (8) fixedly connected to the heat exchange fin (7). The magnets (8) on the two adjacent heat exchange fins (7) are magnetically repulsive.

4. The flue gas treatment structure combining a multi-stage filter and a heat exchanger according to claim 2, characterized in that: The filling block (10) has a first groove (12) on its periphery. A first sealing ring (13) is fixedly connected inside the first groove (12). A hollow cavity is formed inside the first sealing ring (13). An air pump (11) connected to the hollow cavity is fixedly connected to the outside of the additional housing (17).

5. The flue gas treatment structure combining a multi-stage filter and a heat exchanger according to claim 4, characterized in that: The filling block (10) has multiple sliding holes (14) and the filling block (10) is slidably connected to the outside of the straight tube (6) through the sliding holes (14). A second groove (15) is provided inside the filling block (10) and outside the sliding holes (14). A second sealing ring (16) located outside the straight tube (6) is fixedly connected inside the second groove (15). A hollow cavity connected to the air pump (11) is provided inside the second sealing ring (16).

6. The flue gas treatment structure combining a multi-stage filter and a heat exchanger according to claim 5, characterized in that: The first sealing ring (13) and the second sealing ring (16) are both made of rubber.

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