Waste heat recovery device

Abstract

The invention provides a waste heat recovery device, and relates to the field of flue gas waste heat recovery, a plurality of connecting plates are fixedly connected in a recovery shell, the plurality of connecting plates are arranged up and down in rows, the connecting plates are communicated with heat exchange pipes, and the heat exchange pipes are arranged on the upper and lower rows of connecting plates in a penetrating manner; the multiple wind shields are rotationally connected to the connecting plate, and the multiple wind shields are evenly distributed on the side of the heat exchange pipe; the rotating mechanism is used for adjusting the rotating angle of the wind shield; the cleaning scraping ring is connected to the heat exchange tube in a sliding manner and is used for cleaning the outer surface of the heat exchange tube; and the upward moving motor is fixedly connected to the recycling shell, a connecting block is fixedly connected to the middle position of the cleaning scraping ring, a reciprocating lead screw is fixedly connected to an output shaft of the upward moving motor, and the connecting block is slidably connected with the reciprocating lead screw. The surface of the heat exchange tube can be cleaned under the non-stop condition.

Description

Technical Field

[0001] The invention relates to the field of flue gas waste heat recovery, and in particular to a waste heat recovery device. Background Art

[0002] In the industrial production process, high-temperature flue gas is generated when burning fuel or performing chemical reactions. These flue gases usually contain a large amount of heat energy, which will cause a huge waste of energy if they are directly discharged into the atmosphere. The flue gas waste heat recovery device absorbs the waste heat in the high-temperature flue gas and then transfers this part of the heat energy to other media for heating or generating steam, thereby realizing energy reuse.

[0003] Reference publication number CN116465231B, the subject name is an industrial flue gas purification waste heat recovery system and its recovery process. The device removes impurities from the outside air while replenishing air through the coordination of a self-absorption air heat exchange mechanism, a de-impurity mechanism and a unblocking mechanism.

[0004] According to the above technical solution, during the process of treating the flue gas, a large amount of particulate matter remaining in the flue gas adheres to the heat exchange tubes, resulting in a decrease in the operating efficiency of the heat exchange tubes. At the same time, when cleaning the heat exchange tubes, the entire device needs to be shut down and the heat exchange tubes need to be cleaned after shutdown, which affects the overall heat exchange efficiency. Summary of the invention

[0005] In view of this, the present invention provides a waste heat recovery device, which can clean the surface of the heat exchange tube without stopping the machine.

[0006] A waste heat recovery device provided in the present application adopts the following technical solution, including a connecting plate, which is fixedly connected in the recovery shell, and the connecting plates are provided in plurality, and the plurality of connecting plates are distributed in an array at the top and bottom of the recovery shell, and the connecting plates are connected with heat exchange tubes that can pass through each connecting plate; a wind shield plate, which is rotatably connected to the connecting plate, and the plurality of wind shield plates are provided, and the plurality of wind shield plates are distributed on both sides of the heat exchange tube; a rotating mechanism, which is provided on the connecting plate, and the rotating mechanism is used to adjust the rotation angle of the wind shield plate; a cleaning scraper ring, which is slidably connected to the heat exchange tube, and the cleaning scraper ring is used to clean the outer surface of the heat exchange tube; an upward motor, which is fixedly connected to the recovery shell, and a connecting block is fixedly connected to the middle position of the cleaning scraper ring, a reciprocating screw is fixedly connected to the output shaft of the upward motor, and the connecting block is slidably connected to the reciprocating screw.

[0007] By adopting the above technical scheme, the recovery shell is connected to the flue gas outlet, and the material that needs heat exchange is introduced into the heat exchange tube. The rotating mechanism drives the wind shield to rotate, and the wind shield disturbs the flue gas so that the gas can pass through the recovery shell evenly. The wind shields on both sides of the heat exchange tube are driven to rotate by the rotating mechanism. The rotation of the wind shield causes the gas to blow the outermost heat exchange tube, and the upward moving motor is started. The upward moving motor drives the reciprocating screw to rotate. The rotation of the reciprocating screw drives the connecting block to move upward. The upward movement of the connecting block drives the cleaning scraper ring to move on the heat exchange tube to clean the impurities on the heat exchange tube.

[0008] The upward motor and reciprocating screw drive the annular scraper to move up and down. On the one hand, it can ensure the normal operation of the waste heat recovery device to a certain extent, so that the waste heat recovery device is in an efficient working state as much as possible, while improving the energy utilization efficiency and reducing energy consumption. On the other hand, by regularly cleaning the dust, dirt and other impurities in the waste heat recovery device, the wear and corrosion of the heat exchange tube during operation is reduced, and the service life of the equipment is extended. At the same time, regular cleaning can increase the heat exchange efficiency of the waste heat recovery device and reduce the probability of reduced heat exchange efficiency due to the adhesion of dust and dirt.

[0009] Optionally, a lower sliding rod is slidably connected below the connection between the wind shield and the connecting plate, and the lower sliding rod is used to drive the wind shield to rotate. An upper sliding rod is slidably connected above the connection between the wind shield and the connecting plate, and the upper sliding rod is used to drive the wind shield adjacent to the wind shield connected to the lower sliding rod to rotate.

[0010] By adopting the above technical solution, when the wind shield needs to be rotated, the upper sliding rod and the lower sliding rod are driven to rotate, so that the upper sliding rod and the lower sliding rod drive two adjacent wind shields to rotate, and the wind shield rotates to adjust the direction of smoke travel.

[0011] By adjusting the direction of smoke travel, the smoke can be in more complete contact with the heat exchange tubes in the recovery shell, thereby improving the heat exchange efficiency. Adjusting the wind direction can optimize the operating state of the gas in the recovery shell, allowing the smoke to flow more smoothly in the recovery shell, thereby improving the overall performance of the system.

[0012] Optionally, the rotating mechanism includes an abutment block fixedly connected to the connecting block, a connecting port is provided on the connecting plate, which can provide avoidance for the abutment block when it moves downward, a connecting rod is slidably connected to the lower position of the connecting plate, a return spring is fixedly connected to the connection between the connecting rod and the connecting plate, a rotating rod is rotatably connected to the top of the connecting rod, and the rotating rod is rotatably connected to the lower sliding rod.

[0013] By adopting the above technical solution, the upward moving motor starts and drives the reciprocating screw to rotate, so that the connecting block moves downward, and the downward movement of the connecting block drives the abutment block to move, and the abutment block passes through the connecting port and passes into the bottom of the connecting plate, pushing the connecting rod, and the movement of the connecting rod drives the rotating rod to rotate, and the rotation of the rotating rod drives the lower sliding rod to rotate, so that the lower sliding rod drives the wind shield plate on one side of the heat exchange tube to rotate.

[0014] Optionally, a main gear is fixedly connected above the wind shield, a sub-gear is meshed at the side wall of the main gear, the sub-gear is fixedly connected to the rotating rod, and a wind shield rod is provided at the connection between the sub-gear and the upper sliding rod, and the wind shield rod is used to drive the upper sliding rod to rotate.

[0015] By adopting the above technical solution, when the windshield located on one side of the heat exchange tube rotates, it drives the main gear to rotate, the main gear rotates to drive the sub-gear to rotate, the sub-gear rotates to drive the windshield rod to rotate, the windshield rod rotates to drive the upper connecting rod to rotate, and the upper connecting rod rotates to drive the windshield located on the other side of the rotated windshield to rotate. By synchronously adjusting the rotation of the windshield, the flow path and speed of the flue gas in the recovery shell can be adjusted, and the adjusted flue gas is more convenient for recovering the waste heat in the flue gas. By increasing the contact area between the flue gas and the heat exchange tube, the heat exchange efficiency of the heat exchange tube is improved to a certain extent.

[0016] In summary, compared with the prior art, the present application includes at least one of the following beneficial technical effects: 1. The upward motor and reciprocating screw drive the annular scraper to move up and down. On the one hand, it can ensure the normal operation of the waste heat recovery device to a certain extent, so that the waste heat recovery device is in an efficient working state as much as possible, while improving the energy utilization efficiency and reducing energy consumption. On the other hand, by regularly cleaning the dust, dirt and other impurities in the waste heat recovery device, the wear and corrosion of the heat exchange tube during operation is reduced, and the service life of the equipment is extended. At the same time, regular cleaning can increase the heat exchange efficiency of the waste heat recovery device and reduce the probability of reduced heat exchange efficiency due to the adhesion of dust and dirt.

[0017] 2. By adjusting the direction of flue gas, the flue gas can be in more complete contact with the heat exchange tube in the recovery shell, thereby improving the heat exchange efficiency. Adjusting the wind direction can optimize the operating state of the gas in the recovery shell, making the flue gas flow more smoothly in the recovery shell, thereby improving the overall performance of the system.

[0018] 3. By synchronously adjusting the rotation of the wind shield, the flow path and speed of the flue gas in the recovery shell can be adjusted, and the adjusted flue gas can be more convenient for recovering the waste heat in the flue gas. By increasing the contact area between the flue gas and the heat exchange tube, the heat exchange efficiency of the heat exchange tube is improved to a certain extent. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic structural diagram of a waste heat recovery device according to this embodiment; Figure 2 This is a schematic diagram showing the structure of the interior of the recycling shell in this embodiment; Figure 3 This is a schematic diagram showing the structure of the connecting plate and the heat exchange tube in this embodiment; Figure 4 This is a schematic diagram showing the structure of the bottom of the connecting plate in this embodiment; Figure 5 For this example, Figure 3 A partial enlarged view of the middle area A; Figure 6 For this example, Figure 4 A partial enlarged view of area B in the middle.

[0020] Explanation of the accompanying drawings: 1. Recovery shell; 11. Connecting plate; 2. Heat exchange tube; 3. Wind shield; 4. Rotating mechanism; 41. Abutment block; 42. Connecting port; 43. Connecting rod; 44. Return spring; 45. Rotating rod; 46. Main gear; 47. Sub-gear; 48. Wind shield rod; 5. Cleaning scraper; 51. Upward motor; 52. Connecting block; 53. Reciprocating screw; 6. Lower sliding rod; 7. Upper sliding rod. DETAILED DESCRIPTION

[0021] To make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the following will be combined with the embodiments of the present invention. Figure 1-Figure 6 , the technical scheme of the embodiment of the present invention is clearly and completely described. Obviously, the described embodiment is a part of the embodiment of the present invention, not all of the embodiments. Based on the described embodiment of the present invention, all other embodiments obtained by ordinary technicians in this field belong to the scope of protection of the present invention.

[0022] Reference Figure 1 , Figure 2 and Figure 3The present embodiment provides a waste heat recovery device, including a connection plate 11 fixedly connected to a recovery shell 1, a plurality of connection plates 11 are provided, and the plurality of connection plates 11 are fixedly connected to the upper inner wall and the lower inner wall of the recovery shell 1, a plurality of connection plates 11 are connected to heat exchange tubes 2, and the heat exchange tubes 2 are evenly laid in the recovery shell 1, a windshield 3 is rotatably connected to the connection plate 11, and a plurality of windshields 3 are provided, and the plurality of windshields 3 are distributed at the side of the heat exchange tube 2, and a rotation mechanism 4 is provided on the connection plate 11, and the rotation mechanism 4 is used to adjust the rotation angle of the windshield 3. A cleaning scraper is slidably connected to the heat exchange tube 2, and the cleaning scraper is used to clean the outer surface of the heat exchange tube 2. An upward motor 51 is fixedly connected to the recovery shell 1, and a connection block 52 is fixedly connected to the middle position of the cleaning scraper ring 5, a reciprocating screw 53 is fixedly connected to the output shaft of the upward motor 51, and the connection block 52 is slidably connected to the reciprocating screw 53.

[0023] The recovery shell 1 is connected to the flue gas outlet, and the material that needs heat exchange is introduced into the heat exchange tube 2. The rotating mechanism 4 drives the wind shield 3 to rotate. The wind shield 3 disturbs the flue gas so that the gas can pass through the recovery shell 1 evenly. The wind shield 3 on both sides of the heat exchange tube 2 is driven to rotate by the rotating mechanism 4. The rotation of the wind shield 3 causes the gas to blow the outermost heat exchange tube 2. The upward moving motor 51 is started, and the upward moving motor 51 drives the reciprocating screw 53 to rotate. The rotation of the reciprocating screw 53 drives the connecting block 52 to move upward. The upward movement of the connecting block 52 drives the cleaning scraper 5 to move on the heat exchange tube 2 to clean the impurities on the heat exchange tube 2.

[0024] By driving the annular scraper to move up and down through the upward motor 51 and the reciprocating screw 53, on the one hand, the normal operation of the waste heat recovery device can be ensured to a certain extent, so that the waste heat recovery device is in an efficient working state as much as possible, while improving the energy utilization efficiency and reducing energy consumption. On the other hand, by regularly cleaning the dust, dirt and other impurities in the waste heat recovery device, the wear and corrosion of the heat exchange tube 2 during operation is reduced, and the service life of the equipment is extended. At the same time, regular cleaning can increase the heat exchange efficiency of the waste heat recovery device and reduce the probability of reduced heat exchange efficiency due to the adhesion of dust and dirt.

[0025] Reference Figure 3 and Figure 4 A lower sliding rod 6 is slidably connected below the connection between the wind shield 3 and the connecting plate 11, and the lower sliding rod 6 is used to drive the wind shield 3 to rotate. An upper sliding rod 7 is slidably connected above the connection between the wind shield 3 and the connecting plate 11, and the upper sliding rod 7 is used to drive the wind shield 3 adjacent to the wind shield 3 connected to the lower sliding rod 6 to rotate.

[0026] When the windshield plate 3 needs to be rotated, the upper sliding rod 7 and the lower sliding rod 6 are driven to rotate, so that the upper sliding rod 7 and the lower sliding rod 6 drive two adjacent windshield plates 3 to rotate, and the windshield plates 3 rotate to adjust the traveling direction of the smoke.

[0027] By adjusting the direction of flue gas travel, the flue gas can be in more complete contact with the heat exchange tube 2 in the recovery shell 1, thereby improving the heat exchange efficiency. Adjusting the wind direction can optimize the operating state of the gas in the recovery shell 1, allowing the flue gas to flow more smoothly in the recovery shell 1, thereby improving the overall performance of the system.

[0028] Reference Figure 3 , Figure 4 and Figure 6 The rotating mechanism 4 includes an abutting block 41 fixedly connected to the connecting block 52. When the abutting block 41 moves downward, a connecting port 42 is provided at the position where the abutting block 41 abuts against the connecting plate 11. A connecting rod 43 is slidably connected to the lower position of the connecting plate 11. A return spring 44 is fixedly connected to the connection between the connecting rod 43 and the connecting plate 11. A rotating rod 45 is rotatably connected to the top of the connecting rod 43, and the rotating rod 45 is rotatably connected to the lower sliding rod 6.

[0029] The upward motor 51 starts and drives the reciprocating screw rod 53 to rotate, so that the connecting block 52 moves downward, and the connecting block 52 moves downward and drives the abutment block 41 to move. The abutment block 41 passes through the connecting port 42 and passes into the bottom of the connecting plate 11, pushing the connecting rod 43. The movement of the connecting rod 43 drives the rotating rod 45 to rotate, and the rotation of the rotating rod 45 drives the lower sliding rod 6 to rotate, so that the lower sliding rod 6 drives the wind shield 3 on one side of the heat exchange tube 2 to rotate.

[0030] Reference Figure 5 A main gear 46 is fixedly connected above the windshield 3, a sub-gear 47 is meshed at the side wall of the main gear 46, the sub-gear 47 is fixedly connected to the rotating rod 45, and a windshield rod 48 is provided at the connection between the sub-gear 47 and the upper sliding rod 7, and the windshield rod 48 is used to drive the upper sliding rod 7 to rotate.

[0031] When the wind shield plate 3 located on one side of the heat exchange tube 2 rotates, the main gear 46 is driven to rotate, the main gear 46 is driven to rotate, the sub-gear 47 is driven to rotate, the sub-gear 47 is driven to rotate, the wind shield rod 48 is driven to rotate, the wind shield rod 48 is driven to rotate, the upper connecting rod 43 is driven to rotate, the upper connecting rod 43 is driven to rotate the wind shield plate 3 located on the other side of the rotated wind shield plate 3.

[0032] By synchronously adjusting the rotation of the wind shield 3, the flow path and speed of the flue gas in the recovery shell 1 can be adjusted, and the adjusted flue gas can be more conveniently used to recover the waste heat in the flue gas. By increasing the contact area between the flue gas and the heat exchange tube 2, the heat exchange efficiency of the heat exchange tube 2 is improved to a certain extent.

[0033] The implementation principle of a waste heat recovery device in the embodiment of the present application is: the recovery shell 1 is connected to the flue gas outlet, and the material that needs heat exchange is introduced into the heat exchange tube 2, the upward motor 51 is started to drive the reciprocating screw 53 to rotate, so that the connecting block 52 moves downward, and the connecting block 52 moves downward to drive the abutment block 41 to move, and the abutment block 41 passes through the connecting port 42 and passes into the bottom of the connecting plate 11, pushing the connecting rod 43, and the movement of the connecting rod 43 drives the rotating rod 45 to rotate, and the rotation of the rotating rod 45 drives the lower sliding rod 6 to rotate, so that the lower sliding rod 6 drives the wind shield 3 on one side of the heat exchange tube 2 to rotate.

[0034] When the wind shield plate 3 located on one side of the heat exchange tube 2 rotates, the main gear 46 is driven to rotate, the main gear 46 is driven to rotate, the sub-gear 47 is driven to rotate, the sub-gear 47 is driven to rotate, the wind shield rod 48 is driven to rotate, the wind shield rod 48 is driven to rotate, the upper connecting rod 43 is driven to rotate, the upper connecting rod 43 is driven to rotate the wind shield plate 3 located on the other side of the rotating wind shield plate 3.

[0035] The wind shield 3 rotates to allow the gas to blow the outermost heat exchange tube 2, starting the upward movement motor 51, which drives the reciprocating screw 53 to rotate. The rotation of the reciprocating screw 53 drives the connecting block 52 to move upward. The upward movement of the connecting block 52 drives the cleaning scraper 5 to move on the heat exchange tube 2 to clean the impurities on the heat exchange tube 2.

[0036] In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0037] The above is a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A waste heat recovery device, characterized in that: include: A connecting plate (11) is fixedly connected in the recovery shell (1), and a plurality of the connecting plates (11) are provided. The plurality of connecting plates (11) are distributed in an array at the top and bottom of the recovery shell (1), and the connecting plates (11) are connected to a heat exchange tube (2) that can pass through each connecting plate (11); A windshield (3) is rotatably connected to the connecting plate (11), and a plurality of windshields (3) are provided, wherein the plurality of windshields (3) are distributed on both sides of the heat exchange tube (2); A rotating mechanism (4) is arranged on the connecting plate (11), and the rotating mechanism (4) is used to adjust the rotating angle of the wind shield (3); A cleaning scraper ring (5) is slidably connected to the heat exchange tube (2), and the cleaning scraper ring (5) is used to clean dirt from the outer surface of the heat exchange tube (2); An upward moving motor (51) is fixedly connected to the recovery shell (1), and a connecting block (52) is fixedly connected to the middle position of the cleaning scraper ring (5), a reciprocating screw rod (53) is fixedly connected to the output shaft of the upward moving motor (51), and the connecting block (52) is slidably connected to the reciprocating screw rod (53).

2. A waste heat recovery device according to claim 1, characterized in that: A lower sliding rod (6) is slidably connected below the connection between the wind shield (3) and the connecting plate (11), and the lower sliding rod (6) is used to drive the wind shield (3) to rotate. An upper sliding rod (7) is slidably connected above the connection between the wind shield (3) and the connecting plate (11), and the upper sliding rod (7) is used to drive the wind shield (3) adjacent to the wind shield (3) connected to the lower sliding rod (6) to rotate.

3. A waste heat recovery device according to claim 2, characterized in that: The rotating mechanism (4) comprises an abutment block (41) fixedly connected to the connecting block (52); the connecting plate (11) is provided with a connection port (42) capable of providing an escape for the abutment block (41) when the abutment block (41) moves downward; a connecting rod (43) is slidably connected to the lower portion of the connecting plate (11); a return spring (44) is fixedly connected to the connecting rod (43) at the connection with the connecting plate (11); a rotating rod (45) is rotatably connected to the top of the connecting rod (43); and the rotating rod (45) is rotatably connected to the lower sliding rod (6).

4. A waste heat recovery device according to claim 3, characterized in that: A main gear (46) is fixedly connected to the upper side of the windshield plate (3); a secondary gear (47) is meshed with a side wall of the main gear (46); the secondary gear (47) is fixedly connected to the rotating rod (45); and a windshield rod (48) is provided at the connection between the secondary gear (47) and the upper sliding rod (7); the windshield rod (48) is used to drive the upper sliding rod (7) to rotate.

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