Fluoroplastic steel gas heat exchanger for low-temperature flue gas waste heat recovery

Abstract

The invention relates to the technical field of gas heat exchangers, in particular to a fluoroplastic steel gas heat exchanger for low-temperature flue gas waste heat recovery, which comprises a cylinder, supporting plates are fixedly connected to two ends of the inner wall of the cylinder, a cleaning assembly is arranged at one end of the cylinder, and the cleaning assembly comprises a fixing ring and two semicircular grooves formed in the inner wall of the cylinder. The fixing ring is fixedly connected to the outer wall of the cylinder in a sleeving mode, two bolts are connected to the surface of the fixing ring in a threaded mode, the other end of each bolt is connected with a flange ring in a threaded mode, smoke is input into the cylinder through the chimney, fluid in the heat exchange pipe is heated through the smoke, and when a large amount of smoke is attached to the outer wall of the heat exchange pipe, a sliding rod is pulled to drive a scraper to move; the scraping plate drives the conical cylinder to scrape and wash the outer wall of the heat exchange pipe, smoke dust attached to the heat exchange pipe is removed, meanwhile, smoke dust left in the cylinder can be sucked through the smoke pipe, and therefore the heat exchange pipe can be cleaned under the condition that the machine is not stopped and the equipment is not disassembled.

Description

Technical Field

[0001] The invention relates to the technical field of gas heat exchangers, in particular to a fluoroplastic steel gas heat exchanger used for recovering waste heat from low-temperature flue gas. Background Art

[0002] Fluoroplastic steel gas heat exchanger is a kind of equipment specially used for heat exchange between gases. Fluoroplastic steel has good corrosion resistance and high temperature resistance and is widely used in high temperature environment. Gas heat exchanger plays an important role in industrial production and energy fields. It realizes heat transfer between gases of different temperatures through efficient heat transfer mechanism, and provides key temperature control means for various industrial processes. Gas heat exchanger can preheat materials by absorbing waste heat in flue gas to be discharged. The use of gas heat exchanger can effectively reuse this part of wasted energy, so that the energy utilization efficiency of the whole production system can be significantly improved.

[0003] For example, a heat exchanger and a calcining furnace flue gas waste heat recovery and utilization device with publication number CN219347444U, although the heat exchange tubes are detachably connected and convenient to be regularly removed for cleaning to ensure the heat exchange effect and improve the waste heat recovery and utilization rate, the removal and replacement of the heat exchange tubes requires opening the top covers at both ends of the heat exchanger, which results in the existing heat exchanger needing to stop working before it can be removed and replaced for cleaning, and the water pipes inside the existing gas heat exchanger are not isolated from the inside of the smoke box, which results in water flowing into the smoke box as desired, which makes it difficult to clean the mixing block of the water flow and the smoke, and affects the heat conduction of the heat exchanger. Summary of the invention

[0004] In view of the problems in the prior art, the present invention provides a fluoroplastic steel gas heat exchanger for recovering waste heat from low-temperature flue gas.

[0005] The technical solution adopted by the present invention to solve the technical problem is: a fluoroplastic steel gas heat exchanger for low-temperature flue gas waste heat recovery, comprising a cylinder, both ends of the inner wall of the cylinder are movably sleeved with support plates, a plurality of plug holes are opened on the surface of the support plate, heat exchange tubes are plugged into the inside of the plug holes, one end of the heat exchange tube is fixedly connected to two water tanks, and the outer wall of the cylinder is fixedly connected to two chimneys; A cleaning assembly is provided at one end of the cylinder, and the cleaning assembly includes a fixing ring and two semicircular grooves opened on the inner wall of the cylinder, the fixing ring is fixedly sleeved on the outer wall of the cylinder, two bolts are threadedly connected to the surface of the fixing ring, the other end of the bolt is threadedly connected to a flange ring, and the other side of the flange ring is fixedly connected to a cylinder cover, and two clamping grooves are symmetrically opened on the inner wall of the cylinder cover, an L-shaped tube is clamped inside the clamping groove, the L-shaped tube is fixedly connected to the water tank, the L-shaped tube is clamped inside the semicircular groove, a sliding rod is slidably inserted at the center of the cylinder cover, one end of the sliding rod passes through the support plate and extends to the inside of the cylinder, a plurality of scrapers are fixedly sleeved on the surface of the sliding rod, a plurality of cones are fixedly connected to the side wall of the scraper close to the cylinder cover, and a plurality of clamping holes are opened on the surface of the scraper.

[0006] Specifically, two balls are symmetrically embedded at the lower end of the outer circular side wall of the scraper, and two sliding grooves are opened on the inner wall of the lower end of the cylinder, and the balls are slidably connected inside the sliding grooves.

[0007] Specifically, the heat exchange tube is inserted into a plurality of clamping holes, and the cone is sleeved on the outer wall of the heat exchange tube.

[0008] Specifically, openings are provided on the surface of the scraper, and the openings on two adjacent scrapers are respectively located at two ends of the slide rod.

[0009] Specifically, a driving assembly is provided on the outer wall of the cylinder cover, and the driving assembly includes two clamping plates and a rotating groove opened at one end of the sliding rod, a fixed shaft is fixedly connected to the clamping plate, a rotating plate is rotatably connected to the surface of the fixed shaft, a strip opening is opened at the center of the rotating plate, a sliding block is slidably connected to the inside of the strip opening, and the sliding block is fixedly connected to the inside of the rotating groove.

[0010] Specifically, the circulation component includes a circular ring, which is fixedly sleeved on the outer wall of the cylinder, a fixing bolt is threadedly connected to the surface of the circular ring, a sealing ring is threadedly connected to the other end of the fixing bolt, a sleeve is fixedly connected to the other side of the sealing ring, a partition is fixedly connected to the inner wall of the sleeve, a plurality of through holes are opened on the surface of the partition, and a plurality of rubber tubes are fixedly connected to the side wall of the partition close to the cylinder.

[0011] Specifically, one end of the rubber tube is clamped in the interior of the plurality of heat exchange tubes, and the other end of the rubber tube corresponds to the through hole.

[0012] Beneficial effects of the present invention: (1) The fluoroplastic steel gas heat exchanger for low-temperature flue gas waste heat recovery described in the present invention inputs flue gas into the cylinder through a chimney, so that the flue gas heats the fluid in the heat exchange tube. When a large amount of smoke and dust adheres to the outer wall of the heat exchange tube, pulling the sliding rod can drive the scraper to move, and the scraper drives the cone to scrape and wash the outer wall of the heat exchange tube, so that the smoke and dust attached to the heat exchange tube is removed. At the same time, the smoke and dust left in the cylinder can be sucked out through the chimney, so that the heat exchange tube can be cleaned without stopping the machine or dismantling the equipment.

[0013] (2) The fluoroplastic steel gas heat exchanger for low-temperature flue gas waste heat recovery described in the present invention fixes the ring and the sealing ring by a fixing bolt, and seals the gap between the cylinder and the sleeve by the sealing ring. At this time, the rubber tube is inserted into the interior of the heat exchange tube, so that the water flow in the heat exchange tube flows through the rubber tube and the through hole into the space between the sleeve and the partition. In this way, the water flow in the cylinder and the heat exchange tube can be separated by the partition to prevent the water flow from mixing with the flue gas and agglomerating to affect the cleaning efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0015] Figure 1 A schematic cross-sectional structure of a fluoroplastic steel gas heat exchanger for low-temperature flue gas waste heat recovery provided by the present invention Figure 1 ; Figure 2 A schematic diagram of the appearance structure of a fluoroplastic steel gas heat exchanger for low-temperature flue gas waste heat recovery provided by the present invention; Figure 3 A schematic cross-sectional structure of a fluoroplastic steel gas heat exchanger for low-temperature flue gas waste heat recovery provided by the present invention Figure 2 ; Figure 4 A schematic diagram of a scraper structure of a fluoroplastic steel gas heat exchanger for low-temperature flue gas waste heat recovery provided by the present invention; Figure 5 A schematic diagram of the partition structure of a fluoroplastic steel gas heat exchanger for low-temperature flue gas waste heat recovery provided by the present invention; Figure 6 A schematic diagram of the cylindrical structure of a fluoroplastic steel gas heat exchanger for low-temperature flue gas waste heat recovery provided by the present invention; Figure 7 A schematic diagram of the heat exchange tube structure of a fluoroplastic steel gas heat exchanger for low-temperature flue gas waste heat recovery provided by the present invention.

[0016] In the figure: 1. cylinder; 2. support plate; 3. socket; 4. heat exchange tube; 5. water tank; 6. cleaning component; 61. fixing ring; 62. bolt; 63. flange ring; 64. cylinder cover; 65. clamping groove; 66. L-shaped tube; 67. semicircular groove; 68. slide rod; 69. scraper; 610. cone; 611. opening; 612. clamping hole; 613. ball; 614. slide groove; 7. driving component; 71. clamping plate; 72. fixed shaft; 73. rotating plate; 74. strip mouth; 75. slider; 76. rotating groove; 8. circulation component; 81. ring; 82. fixing bolt; 83. sealing ring; 84. sleeve; 85. partition; 86. through hole; 87. rubber cylinder; 9. chimney. DETAILED DESCRIPTION

[0017] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0018] See also Figures 1 to 7 , the present invention provides the following technical solutions: Embodiment 1: A fluoroplastic steel gas heat exchanger for recovering waste heat from low-temperature flue gas comprises a cylinder 1, support plates 2 are movably sleeved on both ends of the inner wall of the cylinder 1, a plurality of insertion holes 3 are provided on the surface of the support plate 2, heat exchange tubes 4 are inserted into the insertion holes 3, one end of the heat exchange tubes 4 is fixedly connected to two water tanks 5, and two chimneys 9 are fixedly connected to the outer wall of the cylinder 1.

[0019] When in use, first insert the heat exchange tube 4 into the socket 3, support the heat exchange tube 4 through the support plate 2, then input the fluid to be heated from one end of the heat exchange tube 4, and then input flue gas into the cylinder 1 through the chimney 9, heat the heat exchange tube 4 by the temperature of the flue gas, so that the fluid inside the heat exchange tube 4 is heated.

[0020] Embodiment 2: The technical solution of this embodiment is different from that of Embodiment 1 and includes: a cleaning assembly 6 is provided at one end of the cylinder 1, the cleaning assembly 6 includes a fixing ring 61 and two semicircular grooves 67 provided on the inner wall of the cylinder 1, the fixing ring 61 is fixedly sleeved on the outer wall of the cylinder 1, two bolts 62 are threadedly connected on the surface of the fixing ring 61, the other end of the bolt 62 is threadedly connected to a flange ring 63, the other side of the flange ring 63 is fixedly connected to a cylinder cover 64, and two semicircular grooves 67 are symmetrically provided on the inner wall of the cylinder cover 64. A clamping groove 65 is formed, an L-shaped tube 66 is clamped inside the clamping groove 65, the L-shaped tube 66 is fixedly connected to the water tank 5, the L-shaped tube 66 is clamped inside the semicircular groove 67, a slide rod 68 is slidably inserted at the center of the cylinder cover 64, one end of the slide rod 68 passes through the support plate 2 and extends to the inside of the cylinder 1, a plurality of scrapers 69 are fixedly sleeved on the surface of the slide rod 68, a plurality of cones 610 are fixedly connected to the side wall of the scraper 69 close to the cylinder cover 64, and a plurality of clamping holes 612 are opened on the surface of the scraper 69.

[0021] Two balls 613 are symmetrically embedded at the lower end of the outer circular side wall of the scraper 69, and two slide grooves 614 are opened on the inner wall of the lower end of the cylinder 1. The balls 613 are slidably connected inside the slide grooves 614. Through the balls 613, the scraper 69 can slide stably along the slide grooves 614, reducing the friction between the scraper 69 and the inner wall of the cylinder 1.

[0022] The heat exchange tube 4 is inserted into the plurality of clamping holes 612 , and the cone 610 is sleeved on the outer wall of the heat exchange tube 4 , so that the cone 610 scrapes the surface of the heat exchange tube 4 when moving.

[0023] An opening 611 is provided on the surface of the scraper 69. The openings 611 on two adjacent scrapers 69 are respectively located at both ends of the slide bar 68. The smoke flows alternately between the scrapers 69 through the openings, so that the heat of the smoke fully fills the space inside the cylinder 1.

[0024] When in use, first insert the scraper 69 into the inside of the cylinder 1, then clamp the support plate 2 on one side on the inner wall of the cylinder 1, and then insert the heat exchange tube 4 into the clamping hole 612, so that the cone 610 is sleeved on the surface of the heat exchange tube 4, and the water tank 5 drives the L-shaped tube 66 to be clamped in the semicircular groove 67, and then push the other support plate 2 sleeved on the surface of the slide rod 68 to be clamped into the inner wall of the other side of the cylinder 1, and then fix the flange ring 63 with the fixing ring 61 through the bolt 62, so that the cylinder cover 64 is clamped on the outer wall of the water tank 5, and the heat exchange tube is connected to the water tank 5. 4, so that the fluid flows in the multiple heat exchange tubes 4, and then smoke is input into the cylinder 1 through the chimney 9, so that the smoke heats the fluid in the heat exchange tube 4. When a large amount of smoke and dust adheres to the outer wall of the heat exchange tube 4, the sliding rod 68 can be pulled to drive the scraper 69 to move, and the scraper 69 drives the cone 610 to scrape and wash the outer wall of the heat exchange tube 4, so that the smoke and dust attached to the heat exchange tube 4 is removed. At the same time, the smoke and dust left in the cylinder 1 can be sucked through the chimney 9, so that the heat exchange tube 4 can be cleaned without stopping the machine or dismantling the equipment.

[0025] Embodiment 3: The technical solution of this embodiment that is different from that of Embodiment 2 includes: a driving assembly 7 is arranged on the outer wall of the cylinder cover 64, the driving assembly 7 includes two clamping plates 71 and a rotating groove 76 opened at one end of the sliding rod 68, a fixed shaft 72 is fixedly connected to the clamping plate 71, a rotating plate 73 is rotatably connected to the surface of the fixed shaft 72, a strip-shaped opening 74 is opened at the center of the rotating plate 73, a sliding block 75 is slidably connected to the inside of the strip opening 74, and the sliding block 75 is fixedly connected to the inside of the rotating groove 76.

[0026] When in use, first pull the rotating plate 73 away from one end of the fixed shaft 72, and use the fixed shaft 72 to provide a lever for the rotating plate 73, so that the pulling force of the rotating plate 73 on the slider 75 is amplified, and the slider 75 drives the slide bar 68 to move, thereby effectively reducing the force required to pull the slide bar 68, making it easier for workers to work.

[0027] Embodiment 4: The technical solution that distinguishes this embodiment from Embodiment 3 includes: the circulation component 8 includes a circular ring 81, the circular ring 81 is fixedly sleeved on the outer wall of the cylinder 1, a fixing bolt 82 is threadedly connected to the surface of the circular ring 81, a sealing ring 83 is threadedly connected to the other end of the fixing bolt 82, a sleeve 84 is fixedly connected to the other side of the sealing ring 83, a partition 85 is fixedly connected to the inner wall of the sleeve 84, a plurality of through holes 86 are opened on the surface of the partition 85, and a plurality of rubber tubes 87 are fixedly connected to the side wall of the partition 85 close to the cylinder 1.

[0028] One end of the rubber tube 87 is clamped in the interior of the plurality of heat exchange tubes 4 , and the other end of the rubber tube 87 corresponds to the through hole 86 , so that the fluid in the heat exchange tube 4 is guided to flow into the through hole 86 through the rubber tube 87 .

[0029] When in use, the ring 81 and the sealing ring 83 are fixed by the fixing bolt 82, and the gap between the cylinder 1 and the sleeve 84 is sealed by the sealing ring 83. At this time, the rubber tube 87 is inserted into the interior of the heat exchange tube 4, so that the water flow in the heat exchange tube 4 flows into the space between the sleeve 84 and the partition 85 through the rubber tube 87 and the through hole 86. In this way, the water flow in the cylinder 1 and the heat exchange tube 4 can be separated by the partition 85 to prevent the water flow from mixing with the flue gas and agglomerating to affect the cleaning efficiency.

[0030] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of the present invention is defined by the attached claims and their equivalents.

Claims

1. A fluoroplastic steel gas heat exchanger for recovering waste heat from low-temperature flue gas, comprising a cylinder (1), support plates (2) being movably sleeved at both ends of the inner wall of the cylinder (1), a plurality of insertion holes (3) being provided on the surface of the support plate (2), heat exchange tubes (4) being inserted into the insertion holes (3), one end of the heat exchange tubes (4) being fixedly connected to two water tanks (5), and two chimneys (9) being fixedly connected to the outer wall of the cylinder (1); Features: A cleaning assembly (6) is provided at one end of the cylinder (1), the cleaning assembly (6) comprising a fixing ring (61) and two semicircular grooves (67) formed on the inner wall of the cylinder (1), the fixing ring (61) being fixedly sleeved on the outer wall of the cylinder (1), two bolts (62) being threadedly connected on the surface of the fixing ring (61), a flange ring (63) being threadedly connected at the other end of the bolt (62), a cylinder cover (64) being fixedly connected on the other side of the flange ring (63), two clamping grooves (65) being symmetrically formed on the inner wall of the cylinder cover (64), the clamping grooves (65) being arranged on the inner wall of the cylinder cover (64) and the inner wall of the clamping grooves (65) being arranged on the inner wall of the cylinder cover (64). An L-shaped tube (66) is clamped inside, the L-shaped tube (66) is fixedly connected to the water tank (5), the L-shaped tube (66) is clamped inside the semicircular groove (67), a sliding rod (68) is slidably inserted at the center of the cylinder cover (64), one end of the sliding rod (68) passes through the support plate (2) and extends to the inside of the cylinder (1), a plurality of scrapers (69) are fixedly sleeved on the surface of the sliding rod (68), a plurality of cones (610) are fixedly connected to the side wall of the scraper (69) close to the cylinder cover (64), and a plurality of clamping holes (612) are opened on the surface of the scraper (69).

2. The fluoroplastic steel gas heat exchanger for low-temperature flue gas waste heat recovery according to claim 1 is characterized in that: Two balls (613) are symmetrically embedded at the lower end of the outer circular side wall of the scraper (69), and two slide grooves (614) are provided on the inner wall of the lower end of the cylinder (1), and the balls (613) are slidably connected inside the slide grooves (614).

3. The fluoroplastic steel gas heat exchanger for low-temperature flue gas waste heat recovery according to claim 1 is characterized in that: The heat exchange tube (4) is inserted into the plurality of clamping holes (612), and the cone (610) is sleeved on the outer wall of the heat exchange tube (4).

4. The fluoroplastic steel gas heat exchanger for low-temperature flue gas waste heat recovery according to claim 1 is characterized in that: An opening (611) is provided on the surface of the scraper (69), and the openings (611) on two adjacent scrapers (69) are respectively located at two ends of the slide bar (68).

5. The fluoroplastic steel gas heat exchanger for low-temperature flue gas waste heat recovery according to claim 1 is characterized in that: A driving assembly (7) is arranged on the outer wall of the cylinder cover (64), and the driving assembly (7) comprises two clamping plates (71) and a rotating groove (76) provided at one end of the slide rod (68), the clamping plate (71) is fixedly connected to a fixed shaft (72), a rotating plate (73) is rotatably connected to the surface of the fixed shaft (72), a strip-shaped opening (74) is provided at the center of the rotating plate (73), a sliding block (75) is slidably connected to the inside of the strip-shaped opening (74), and the sliding block (75) is fixedly connected to the inside of the rotating groove (76).

6. The fluoroplastic steel gas heat exchanger for low-temperature flue gas waste heat recovery according to claim 1 is characterized in that: The circulation assembly (8) comprises a circular ring (81), the circular ring (81) being fixedly sleeved on the outer wall of the cylinder (1), a fixing bolt (82) being threadedly connected on the surface of the circular ring (81), a sealing ring (83) being threadedly connected on the other end of the fixing bolt (82), a sleeve (84) being fixedly connected on the other side of the sealing ring (83), a partition (85) being fixedly connected on the inner wall of the sleeve (84), a plurality of through holes (86) being formed on the surface of the partition (85), and a plurality of rubber cylinders (87) being fixedly connected on the side wall of the partition (85) close to the cylinder (1).

7. The fluoroplastic steel gas heat exchanger for low-temperature flue gas waste heat recovery according to claim 6 is characterized in that: One end of the rubber tube (87) is clamped inside the plurality of heat exchange tubes (4), and the other end of the rubber tube (87) corresponds to the through hole (86).

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