Energy-saving heat exchange device for drying non-woven fabric and method of using the same

Abstract

The application discloses an energy-saving heat exchange device for drying non-woven fabrics and a use method thereof, and relates to the technical field of heat exchangers.The device comprises an air inlet part, an air extraction part, a heat exchange part, an air outlet part, a heat exchange pipe, a driving structure, a separation structure and two cleaning units.The driving structure drives a worm to rotate through a motor, a gear set and a connecting rod, and the worm is connected with a driving part and the separation structure.The driving part drives a moving part to extend and retract through a worm wheel, a reciprocating rod and a sliding block, so that a cleaning part moves up and down in the gap between pipe bundles.The separation structure drives a fan and a spiral separation blade to rotate through a bevel gear set, so that air extraction and air dust separation are completed.The same power source drives the cleaning and separation functions, the number of independent driving parts is reduced, and energy consumption and equipment cost are reduced.

Description

Technical Field

[0001] This invention relates to the field of heat exchanger technology, specifically to an energy-saving heat exchange device for drying nonwoven fabrics and its usage method. Background Technology

[0002] In the drying process of nonwoven fabrics, heat exchange devices are often used to recover waste heat from exhaust gas in order to reduce energy consumption.

[0003] Existing energy-saving heat exchange devices typically include heat exchange tube bundles and exhaust gas pretreatment structures. When the exhaust gas flows through the heat exchange tube bundles, the fiber dust and particulate matter easily adhere to the tube wall surface, especially at bends and in the gaps between the tube bundles. Over time, this accumulation will form a dust layer, significantly reducing heat exchange efficiency.

[0004] However, existing gas-dust separation structures mostly rely on external power or simple filtration, resulting in limited separation efficiency.

[0005] Furthermore, existing devices generally lack an automatic cleaning structure for the surface of heat exchange tube bundles, or the cleaning mechanism is designed in a simple way that makes it difficult to achieve effective reciprocating motion in narrow tube bundle gaps, resulting in incomplete cleaning and incomplete removal of accumulated dust. Summary of the Invention

[0006] The purpose of this invention is to provide an energy-saving heat exchange device for drying nonwoven fabrics and its usage method, so as to solve the problems in the background art.

[0007] To achieve the above objectives, the present invention provides the following technical solution: An energy-saving heat exchange device for drying non-woven fabrics includes an air inlet, an air extraction section, a heat exchange section, an exhaust section, heat exchange pipes, a drive structure, a separation structure, and two cleaning units. The heat exchange section includes a heat exchange box and two mechanical covers. The two mechanical covers are symmetrically fixedly distributed on the left and right sides of the upper end of the heat exchange box. A mechanical opening is provided through the connection between the heat exchange box and the mechanical cover. Two sets of fixing ears are symmetrically fixed at the front and back of the upper end of the heat exchange box. Each set of fixing ears is located inside a mechanical cover. The air inlet is fixedly installed at the lower end of the air extraction section, the air extraction section is fixed at the left end of the heat exchange box, and the exhaust section is fixed at the right end of the heat exchange box. The heat exchange pipe fittings are installed inside the heat exchange box. The heat exchange pipe fittings include an outlet pipe, an exchange pipe, and an inlet pipe. The outlet pipe and the inlet pipe are fixedly connected to the outlet end and the inlet end of the exchange pipe, respectively. The outlet pipe is close to the exhaust section, and the inlet pipe is close to the exhaust section. The exchange pipe includes several vertical pipe units and several curved pipe units. Every two adjacent vertical pipe units are fixedly connected by a curved pipe unit. Two cleaning units are symmetrically distributed on the left and right sides of the exchange tube inside the heat exchange box. Each cleaning unit includes a driving component, a moving component, and a cleaning component. Each driving component is installed inside a mechanical cover. The moving component is located on one side of the exchange tube inside the heat exchange box. The moving component is connected to the driving component through the mechanical port. The cleaning component is disposed in the gap of the exchange tube bundle. The left and right sides of the cleaning component are respectively connected to the two moving components. The driving component includes a worm gear, which is connected to both a driving structure and a separating structure. The driving structure drives the worm gear to rotate, and the separating structure operates under the drive of the worm gear. The drive structure is installed on the upper end of the heat exchange box. The drive structure is used to drive the drive component in the cleaning unit to run. The drive component drives the cleaning component to move up and down through the moving component. The cleaning component moves up and down to clean the outer wall of the vertical pipe unit and the recessed area of ​​the outer wall of the curved pipe unit. The separation structure is located inside the air inlet and air extraction sections, and is used to separate dust from the exhaust gas.

[0008] Preferably, the driving component includes a worm gear, a reciprocating rod, a slider, and a guide rail; the worm gear meshes with a worm, the worm gear is coaxially fixed with the reciprocating rod, the reciprocating rod is rotatably mounted between two fixed ears, the two fixed ears are symmetrically fixed to the upper end of the heat exchange box, the outer walls of the front and rear ends of the reciprocating rod are symmetrically provided with a set of spiral grooves, the spiral groove set includes two threaded grooves with the same pitch and opposite directions of rotation, two sliders are symmetrically arranged at the front and rear ends of the reciprocating rod, the sliders are provided with crescent plates, the sliders form a sliding fit with the spiral grooves on the surface of the reciprocating rod through the crescent plates, and the rotation direction of the spiral groove set is arranged so that the two sliders move in opposite directions, the guide rail is fixed between the two fixed ears, both sliders are slidably connected to the guide rail, and the two sliders are connected to a moving component passing through the mechanical port.

[0009] Preferably, the moving part is composed of multiple sets of shearing components that are hinged together in sequence; the shearing component includes a shearing plate one, a shearing plate two, and a connecting shaft; the middle of the shearing plate one and the shearing plate two are rotatably connected by the connecting shaft, and both ends of the shearing plate one and the shearing plate two are rotatably connected to the connecting shaft, and two adjacent shearing components are hinged to each other through the connecting shaft at their ends; The upper ends of shearing plates one and two of the uppermost shearing components both pass through the mechanical opening and are rotatably connected to the corresponding two sliders via connecting shafts.

[0010] The moving component also includes several moving blocks. Each connecting shaft at the end of each set of shearing components below is fixedly connected to a moving block. The moving block is connected to a cleaning component located in the gap of the exchange tube bundle.

[0011] Preferably, the cleaning component includes two cleaning plates, several horizontal cleaning rods, and several vertical cleaning rods; the two cleaning plates have grooves along their length at the middle of their opposite ends, and the moving block is slidably embedded in the grooves; several horizontal cleaning rods and several vertical cleaning rods are equidistantly arranged between the two cleaning plates, and the horizontal and vertical cleaning rods are arranged horizontally and vertically intersecting; the outer walls of the horizontal and vertical cleaning rods are provided with several bristles, which are used to clean and remove impurities from the outer walls of the vertical pipe unit and the recessed areas of the outer walls of the curved pipe unit.

[0012] Preferably, the drive structure includes a motor, a first gear, a second gear, and a first connecting rod; the motor is mounted on the upper end of the heat exchange box, the output end of the motor is fixedly connected to the first gear, the first gear meshes with the second gear, the second gear is coaxially fixed with the connecting rod, and the two ends of the first connecting rod extend into the interior of two mechanical covers respectively, and are fixedly connected to the worm gear of the drive component inside the mechanical cover.

[0013] Preferably, the extraction section includes an extraction box, a plurality of support rods are fixed to the upper end of the extraction box, a support plate is fixed to the upper end of the support rods, an inlet hood is fixed to the right end of the extraction box, a heat exchange box is fixed to the right end of the inlet hood, and the inlet hood has a gradually changing structure that is narrower on the left and wider on the right. The separation structure includes an air extraction component and a separation component. The air extraction component is located inside the air extraction box, and the separation component is located inside the air inlet. The suction unit includes a second connecting rod, a first bevel gear, a second bevel gear, a rotating rod, and a fan. One end of the second connecting rod is fixedly connected to a worm gear located on the same side of the suction section, and the other end of the second connecting rod is fixedly connected to the first bevel gear. The first bevel gear meshes with the second bevel gear. The second bevel gear is rotatably mounted on the upper end of the support plate. A rotating rod is fixedly attached to the lower end of the second bevel gear. The lower end of the rotating rod extends into the suction box and is fixedly connected to the fan. The lower end of the fan is connected to a separator inside the air intake section. Preferably, the air intake section includes an air intake pipe, a separator pipe, and a chip removal pipe; the air intake pipe is eccentrically fixed to the side wall of the separator pipe, the separator pipe is fixedly installed at the lower end of the air extraction box, and the chip removal pipe is fixedly installed at the lower end of the separator pipe; The separating component includes a separating rod and a spiral separating blade; the separating rod is rotatably installed inside the separating tube, the separating rod is fixedly connected to the lower end of the fan, and the spiral separating blade is fixed to the side wall of the separating rod.

[0014] Preferably, the exhaust box has an inlet on the side near the discharge hood at its rear end, and a filter plate is slidably and detachably installed at the inlet; The filter plate includes an outer frame and a filter screen. The filter screen is fixed in the outer frame, and a pull opening is provided through one side of the outer frame.

[0015] Preferably, the exhaust section includes an exhaust hood and an exhaust pipe; the left end of the exhaust hood is fixedly connected to a heat exchange box, the right end of the exhaust hood is fixedly connected to an exhaust pipe, and the exhaust hood has a gradually changing structure that is wider on the left and narrower on the right. A drain pipe is fixed at the bottom front end of the heat exchange box. The drain pipe is connected to a wastewater collection pipeline to discharge the condensate generated during the heat exchange process.

[0016] A method for using an energy-saving heat exchange device for drying nonwoven fabrics, characterized in that it is applicable to any of the above-described energy-saving heat exchange devices for drying nonwoven fabrics, and includes the following steps: Step 1: Start the motor of the drive structure. The motor drives gear 2 to rotate through gear 1. Gear 2 drives connecting rod 1 to rotate. Connecting rod 1 drives the worm gears inside the two mechanical covers to rotate. Step 2: The worm gear drives the drive unit of the cleaning unit to run. The drive unit drives the moving part to extend and retract. The moving part drives the cleaning part to move up and down back and forth. The bristles on the cleaning part, together with the condensate generated during the heat exchange process, clean and remove impurities from the outer wall of the vertical tube unit and the recessed areas of the outer wall of the curved tube unit. Step 3: The worm gear simultaneously drives the separation structure to operate. The suction component of the separation structure generates negative pressure in the suction section, drawing the exhaust gas from the intake section. The separation component of the separation structure separates the exhaust gas into dust, and the separated dust is discharged from the chip discharge pipe. Step 4: The exhaust gas enters the heat exchange box through the extraction section, flows through the inside of the exchange tube, and exchanges heat with the medium in the heat exchange box. The gas after heat exchange is discharged from the exhaust section, and the condensate generated during the heat exchange process is discharged from the drain pipe.

[0017] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. The drive structure of this invention drives the worm gear to rotate via a motor, gear set, and connecting rod. The worm gear connects both the drive component and the separation structure. The drive component drives the moving component to extend and retract via a worm wheel, reciprocating rod, and slider, enabling the cleaning component to move up and down reciprocally within the tube bundle gap. The separation structure drives the fan and spiral separation blades to rotate via a bevel gear set, completing the extraction and dust separation. The same power source drives both cleaning and separation functions simultaneously, reducing the number of independent drive components and lowering energy consumption and equipment costs.

[0018] 2. The cleaning component of this invention is composed of horizontal and vertical cleaning rods arranged alternately and vertically. Its bristles, in conjunction with the condensate generated during the heat exchange process, clean and remove impurities from the outer wall of the vertical tube unit and the recessed areas of the outer wall of the curved tube unit. The moving component is composed of multiple sets of shearing components hinged together, achieving a large stroke within the limited mechanical opening space. The moving block is slidably embedded in the groove of the cleaning plate, adaptively compensating for the horizontal displacement caused by shearing expansion and contraction, avoiding interference with the tube bundle, and effectively brushing away the dust and dirt attached to the tube wall to prevent scale buildup from affecting the heat exchange efficiency.

[0019] 3. The separation structure of this invention uses spiral separator blades to centrifuge and separate dust from waste gas. The dust is discharged from the chip discharge pipe, and the separated gas enters the heat exchange tubes through the extraction box. The extraction box has a port at the rear end for slidingly installing a removable filter plate to intercept incompletely separated fine dust. The filter plate can be pulled out for cleaning or replacement via a pull tab. This separation and filtration structure effectively reduces dust entering the heat exchange tube bundle, lowers the risk of blockage, and ensures long-term heat exchange efficiency. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0021] Figure 2 This is a cross-sectional view of the overall internal structure of the present invention.

[0022] Figure 3 This is a schematic diagram of the driving component in the cleaning structure of the present invention.

[0023] Figure 4 This is a schematic diagram of the moving parts and cleaning parts in the cleaning structure of the present invention.

[0024] Figure 5 This is a schematic diagram showing the connection relationship between the driving structure, cleaning structure, and separation structure of the present invention.

[0025] Figure 6 For the present invention Figure 5 A schematic diagram of the structure at point A in the middle.

[0026] Figure 7 This is a schematic diagram of the separation structure of the present invention.

[0027] Figure label annotations: 1. Air intake section; 11. Air intake pipe; 12. Separator pipe; 13. Chip removal pipe; 2. Exhaust unit; 21. Exhaust box; 211. Inlet; 22. Discharge hood; 23. Support rod; 24. Support plate; 3. Heat exchange section; 31. Heat exchange box; 311. Mechanical port; 312. Fixing lug; 313. Drain pipe; 32. Mechanical cover; 4. Exhaust section; 41. Exhaust hood; 42. Exhaust pipe; 5. Heat exchanger fittings; 51. Outlet pipe; 52. Exchange pipe; 521. Vertical pipe unit; 522. Bend pipe unit; 53. Inlet pipe; 6. Drive structure; 61. Motor; 62. Gear 1; 63. Gear 2; 64. Connecting rod 1; 7. Cleaning unit; 71. Drive component; 711. Worm gear; 712. Worm wheel; 713. Reciprocating rod; 714. Slider; 715. Guide rail; 72. Moving component; 721. Shearing plate one; 722. Shearing plate two; 723. Connecting shaft; 724. Moving block; 73. Cleaning component; 731. Cleaning plate; 7311. Slide groove; 732. Horizontal cleaning bar; 733. Vertical cleaning bar; 8. Separation structure; 81. Connecting rod two; 82. Bevel gear one; 83. Bevel gear two; 84. Rotating rod; 85. Fan; 86. Separation rod; 87. Spiral separation blade; 9. Filter plate; 91. Outer frame; 911. Pull-out opening; 92. Filter screen. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0029] In one embodiment, such as Figures 1-7 As shown, an energy-saving heat exchange device for drying non-woven fabrics includes an air inlet 1, an air extraction section 2, a heat exchange section 3, an exhaust section 4, heat exchange pipes 5, a drive structure 6, a separation structure 8, and two cleaning units 7. The heat exchange section 3 includes a heat exchange box 31 and two mechanical covers 32. The two mechanical covers 32 are symmetrically fixed on the left and right sides of the upper end of the heat exchange box 31. A mechanical opening 311 is provided through the connection between the heat exchange box 31 and the mechanical cover 32. Two sets of fixing ears 312 are symmetrically fixed at the front and rear of the upper end of the heat exchange box 31. Each set of fixing ears 312 is located inside a mechanical cover 32. The air inlet 1 is fixedly installed at the lower end of the air extraction part 2, the air extraction part 2 is fixed at the left end of the heat exchange box 31, and the exhaust part 4 is fixed at the right end of the heat exchange box 31. The heat exchange pipe 5 is installed inside the heat exchange box 31. The heat exchange pipe 5 includes an outlet pipe 51, an exchange pipe 52 and an inlet pipe 53. The outlet pipe 51 and the inlet pipe 53 are fixedly connected to the outlet end and the inlet end of the exchange pipe 52, respectively. The outlet pipe 51 is close to the exhaust section 2 and the inlet pipe 53 is close to the exhaust section 4. The exchange pipe 52 includes several vertical pipe units 521 and several bent pipe units 522. Every two adjacent vertical pipe units 521 are fixedly connected through a bent pipe unit 522. Two cleaning units 7 are symmetrically distributed on the left and right sides of the exchange tube 52 inside the heat exchange box 31. Each cleaning unit 7 includes a driving component 71, a moving component 72, and a cleaning component 73. Each driving component 71 is installed inside a mechanical cover 32. The moving component 72 is located on one side of the exchange tube 52 inside the heat exchange box 31. The moving component 72 passes through the mechanical port 311 and is connected to the driving component 71. The cleaning component 73 is set in the tube bundle gap of the exchange tube 52. The left and right sides of the cleaning component 73 are respectively connected to the two moving components 72. The driving component 71 includes a worm gear 711, which is connected to both the driving structure 6 and the separation structure 8. The driving structure 6 drives the worm gear 711 to rotate, and the separation structure 8 operates under the drive of the worm gear 711. The drive structure 6 is installed on the upper end of the heat exchange box 31. The drive structure 6 is used to drive the drive component 71 in the cleaning unit 7 to operate. The drive component 71 drives the cleaning component 73 to move up and down through the moving component 72. The cleaning component 73 moves up and down to clean the outer wall of the vertical pipe unit 521 and the recessed area of ​​the outer wall of the curved pipe unit 522. The separation structure 8 is installed inside the air inlet 1 and the air extraction section 2. The separation structure 8 is used to separate dust from the exhaust gas.

[0030] In this embodiment, during operation, the drive structure 6, once activated, drives the worm gear 711 to rotate. The worm gear 711, through the drive component 71, causes the moving component 72 to extend and retract, thereby driving the cleaning component 73 to move up and down reciprocally within the tube bundle gaps of the heat exchange tube 52, cleaning the outer wall of the vertical tube unit 521 and the recessed areas of the outer wall of the curved tube unit 522. Simultaneously, the worm gear 711 drives the separation structure 8 to operate, achieving air-dust separation within the air inlet 1 and the air extraction section 2, preventing dust in the exhaust gas from entering the heat exchange tubes 5 and causing blockage. This device simultaneously achieves cleaning and separation functions through the same drive source, improving energy efficiency, reducing the frequency of manual maintenance, and ensuring the long-term efficient operation of the heat exchange tubes 5.

[0031] In this embodiment, specifically, the driving component 71 includes a worm gear 712, a reciprocating rod 713, a slider 714, and a guide rail 715; the worm gear 712 meshes with the worm 711, and the worm gear 712 is coaxially fixed with the reciprocating rod 713. The reciprocating rod 713 is rotatably mounted between two fixed ears 312, which are symmetrically fixed to the upper end of the heat exchange box 31. The outer walls of the front and rear ends of the reciprocating rod 713 are symmetrically provided with helical groove groups, each helical groove group including two threads with the same pitch and opposite directions of rotation. The reciprocating rod 713 has two sliders 714 symmetrically arranged at its front and rear ends. Each slider 714 has a crescent plate, which slides into the spiral groove on the surface of the reciprocating rod 713 through the crescent plate. The spiral grooves are arranged in opposite directions so that the two sliders 714 move in opposite directions. The guide rail 715 is fixed between two fixed ears 312. Both sliders 714 are slidably connected to the guide rail 715. The two sliders 714 are connected to the moving part 72 that passes through the mechanical opening 311.

[0032] During operation, the worm gear 711 rotates, driving the worm wheel 712 to rotate. The worm wheel 712 coaxially drives the reciprocating rod 713 to rotate. The helical groove assembly on the reciprocating rod 713 drives two sliders 714 to move in opposite directions under the constraint of the guide rail 715. The sliders 714 drive the cleaning component 73 to move up and down through the moving part 72. This combination of helical grooves and sliders 714 can convert rotational motion into reciprocating linear motion. Moreover, the two sliders 714 move in opposite directions, allowing the cleaning component 73 to be subjected to symmetrical traction forces on both sides of the exchange pipe 52 simultaneously, resulting in smoother movement and avoiding jamming or skewness caused by unilateral force.

[0033] In this embodiment, specifically, the movable component 72 is composed of multiple sets of shearing components that are hinged together in sequence; the shearing components include a first shearing plate 721, a second shearing plate 722, and a connecting shaft 723; the first shearing plate 721 and the second shearing plate 722 are rotatably connected in the middle through the connecting shaft 723, and both ends of the first shearing plate 721 and the second shearing plate 722 are rotatably connected to the connecting shaft 723; adjacent shearing components are hinged to each other through the connecting shaft 723 at their ends; The upper ends of shear plate 721 and shear plate 722 of the uppermost shearing components both pass through the mechanical opening 311 and are rotatably connected to the corresponding two sliders 714 via connecting shaft 723.

[0034] The moving part 72 also includes several moving blocks 724. Each connecting shaft 723 at the end of each set of shearing components below is fixedly connected to a moving block 724. The moving block 724 is connected to the cleaning part 73 located in the tube bundle gap of the exchange tube 52.

[0035] When the two sliders 714 move synchronously in opposite directions, the shearing component expands or contracts like scissors, driving the lower moving block 724 to move up and down. The moving block 724 then drives the cleaning component 73 to rise and fall within the tube bundle gap. This scissor-type telescopic structure can achieve a large travel distance within the limited space of the mechanical opening 311, and each moving block 724 is connected to the cleaning component 73, ensuring that the cleaning component 73 is subjected to uniform force and can adapt to the narrow gap between the exchange tube bundles 52.

[0036] In this embodiment, specifically, the cleaning component 73 includes two cleaning plates 731, a plurality of horizontal cleaning rods 732, and a plurality of vertical cleaning rods 733; the two cleaning plates 731 are provided with grooves 7311 along the length direction at the middle of their opposite ends, and the moving block 724 is slidably embedded in the grooves 7311; a plurality of horizontal cleaning rods 732 and a plurality of vertical cleaning rods 733 are arranged at equal intervals between the two cleaning plates 731, and the plurality of horizontal cleaning rods 732 and the plurality of vertical cleaning rods 733 are arranged horizontally and vertically intersecting; the outer walls of the horizontal cleaning rods 732 and the vertical cleaning rods 733 are provided with a plurality of bristles, which are used to clean and remove impurities from the outer wall of the vertical pipe unit 521 and the recessed position of the outer wall of the curved pipe unit 522.

[0037] When shear plate 721 and shear plate 722 expand or contract relative to each other, the moving block 724 rises and falls synchronously with the connecting shaft 723. Simultaneously, the moving block 724 is slidably fitted into the groove 7311 in the middle of the cleaning plate 731. This sliding fit allows the cleaning component 73 to adapt to horizontal displacement, thus accommodating changes in the horizontal position of the connecting shaft 723 during the expansion and contraction of the shearing components, preventing interference between the cleaning component 73 and the exchange tube 52 due to manufacturing errors or tube bundle deformation. The horizontal cleaning rods 732 and vertical cleaning rods 733 are arranged horizontally and vertically, simultaneously covering the vertical outer wall of the vertical tube unit 521 and the horizontal and inclined surfaces of the recessed areas of the curved tube unit 522. As the moving block 724 drives the cleaning component 73 to move up and down reciprocally, the bristles, in conjunction with the condensate generated during heat exchange, effectively remove dust and dirt adhering to the tube wall, preventing scale buildup from affecting heat exchange efficiency.

[0038] In this embodiment, specifically, the drive structure 6 includes a motor 61, a first gear 62, a second gear 63, and a first connecting rod 64. The motor 61 is mounted on the upper end of the heat exchange box 31. The output end of the motor 61 is fixedly connected to the first gear 62. The first gear 62 meshes with the second gear 63. The second gear 63 is coaxially fixed with the first connecting rod 64. The two ends of the first connecting rod 64 extend into the interior of the two mechanical covers 32 respectively, and are fixedly connected to the worm gear 711 of the drive component 71 inside the mechanical cover 32.

[0039] After the motor 61 starts, it drives the connecting rod 64 to rotate through the meshing transmission of gear 62 and gear 63. The connecting rod 64 simultaneously drives the worm gears 711 in the left and right mechanical covers 32 to rotate synchronously, ensuring that the driving components 71 of the two cleaning units 7 move in unison, so that the cleaning components 73 move synchronously on both sides of the exchange tube 52, avoiding cleaning dead zones caused by tilting or asynchrony.

[0040] In this embodiment, specifically, the extraction section 2 includes an extraction box 21, a plurality of support rods 23 are fixed at the upper end of the extraction box 21, a support plate 24 is fixed at the upper end of the support rods 23, an inlet hood 22 is fixed at the right end of the extraction box 21, a heat exchange box 31 is fixed at the right end of the inlet hood 22, and the inlet hood 22 has a gradually changing structure that is narrower on the left and wider on the right. The separation structure 8 includes an air extraction component and a separation component. The air extraction component is located inside the air extraction box 21, and the separation component is located inside the air inlet 1. The extraction assembly includes a second connecting rod 81, a first bevel gear 82, a second bevel gear 83, a rotating rod 84, and a fan 85. One end of the second connecting rod 81 is fixedly connected to a worm gear 711 located on the same side of the extraction section 2, and the other end of the connecting rod 81 is fixedly connected to the first bevel gear 82. The first bevel gear 82 meshes with the second bevel gear 83, which is rotatably mounted on the upper end of the support plate 24. The lower end of the second bevel gear 83 is fixedly connected to the rotating rod 84, and the lower end of the rotating rod 84 extends into the extraction box 21 and is fixedly connected to the fan 85. The lower end of the fan 85 is connected to a separator inside the air intake section 1. When the worm gear 711 rotates, it drives the connecting rod 81 to rotate. The meshing of bevel gear 82 and bevel gear 83 changes the transmission direction, causing the rotating rod 84 to drive the fan 85 to rotate inside the suction box 21, generating negative pressure and drawing exhaust gas from the intake section 1. At the same time, the rotation of the fan 85 also drives the separator below to operate, realizing integrated drive of suction and separation.

[0041] In this embodiment, specifically, the air intake 1 includes an air intake pipe 11, a separation pipe 12, and a chip removal pipe 13; the air intake pipe 11 is eccentrically fixed to the side wall of the separation pipe 12, the separation pipe 12 is fixedly installed at the lower end of the air extraction box 21, and the chip removal pipe 13 is fixedly installed at the lower end of the separation pipe 12. The separating component includes a separating rod 86 and a spiral separating blade 87; the separating rod 86 is rotatably installed inside the separating tube 12, the separating rod 86 is fixedly connected to the lower end of the fan 85, and the spiral separating blade 87 is fixed to the side wall of the separating rod 86.

[0042] When the fan 85 rotates, it drives the separating rod 86 and the spiral separating blades 87 to rotate synchronously. After the exhaust gas enters the separating pipe 12 eccentrically from the inlet pipe 11, the dust particles are thrown against the pipe wall and move downwards along the spiral direction under the centrifugal force of the spiral separating blades 87, and are finally discharged from the chip discharge pipe 13. The separated gas then enters the extraction box 21 upwards. This gas-dust separation method has a simple structure, requires no additional power source, and can effectively remove fiber dust and particulate matter from the exhaust gas, reducing the accumulation of ash in the heat exchange tubes 5.

[0043] In this embodiment, specifically, an inlet 211 is provided on the side of the exhaust box 21 near the discharge hood 22 at the rear end, and a filter plate 9 is slidably and detachably installed at the inlet 211. The filter plate 9 includes an outer frame 91 and a filter screen 92. The filter screen 92 is fixed in the outer frame 91, and a pull opening 911 is provided through one side of the outer frame 91.

[0044] The filter plate 9 can further intercept fine dust that has not been completely separated before the exhaust gas enters the heat exchange box 31. When the filter screen 92 is too dusty, the operator can pull the filter plate 9 out of the socket 211 through the pull port 911 for cleaning or replacement, which is convenient for maintenance.

[0045] In this embodiment, specifically, the exhaust section 4 includes an exhaust hood 41 and an exhaust pipe 42; the left end of the exhaust hood 41 is fixedly connected to the heat exchange box 31, and the right end of the exhaust hood 41 is fixedly connected to the exhaust pipe 42. The exhaust hood 41 has a gradually changing structure that is wider on the left and narrower on the right. A drain pipe 313 is fixed at the bottom front end of the heat exchange box 31. The drain pipe 313 is connected to a wastewater collection pipe to discharge the condensate generated during the heat exchange process.

[0046] After the exhaust gas exchanges heat with the medium in the heat exchange box 31, its temperature decreases. The water vapor in the gas condenses into water and accumulates at the bottom of the heat exchange box 31. It is then discharged through the drain pipe 313 to prevent the condensate from corroding the box or affecting subsequent heat exchange.

[0047] A method for using an energy-saving heat exchange device for drying nonwoven fabrics, characterized in that it is applicable to any of the above-described energy-saving heat exchange devices for drying nonwoven fabrics, and includes the following steps: Step 1: Start the motor 61 of the drive structure 6. The motor 61 drives the gear 63 to rotate through the gear 1 62. The gear 63 drives the connecting rod 64 to rotate. The connecting rod 64 drives the worm gear 711 inside the two mechanical covers 32 to rotate. Step 2: The worm gear 711 drives the drive component 71 of the cleaning unit 7 to run. The drive component 71 drives the moving component 72 to extend and retract. The moving component 72 drives the cleaning component 73 to move up and down reciprocally. The bristles on the cleaning component 73, together with the condensate generated during the heat exchange process, clean and remove impurities from the outer wall of the vertical tube unit 521 and the recessed areas of the outer wall of the curved tube unit 522. Step 3: The worm gear 711 simultaneously drives the separation structure 8 to operate. The suction component of the separation structure 8 generates negative pressure in the suction section 2, drawing the exhaust gas from the intake section 1. The separation component of the separation structure 8 separates the exhaust gas from the dust, and the separated dust is discharged from the chip discharge pipe 13. Step 4: The exhaust gas enters the heat exchange box 31 through the exhaust section 2, flows through the inside of the exchange pipe 52, and exchanges heat with the medium in the heat exchange box 31. The gas after heat exchange is discharged from the exhaust section 4, and the condensate generated during the heat exchange process is discharged from the drain pipe 313.

[0048] This method uses a single motor 61 to drive two functional modules: cleaning and separation. It achieves automatic cleaning and exhaust gas pretreatment, reducing downtime for maintenance. At the same time, it makes full use of condensate to assist in cleaning, improving heat exchange efficiency and equipment reliability.

[0049] Any aspects of this invention not described in detail are well-known to those skilled in the art.

[0050] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. An energy-saving heat exchange device for drying nonwoven fabrics, characterized in that, It includes an air intake section, an air extraction section, a heat exchange section, an exhaust section, heat exchange pipes, a drive structure, a separation structure, and two cleaning units; The heat exchange section includes a heat exchange box and two mechanical covers. The two mechanical covers are symmetrically fixedly distributed on the left and right sides of the upper end of the heat exchange box. A mechanical opening is provided through the connection between the heat exchange box and the mechanical cover. Two sets of fixing ears are symmetrically fixed at the front and back of the upper end of the heat exchange box. Each set of fixing ears is located inside a mechanical cover. The air inlet is fixedly installed at the lower end of the air extraction section, the air extraction section is fixed at the left end of the heat exchange box, and the exhaust section is fixed at the right end of the heat exchange box. The heat exchange pipe fittings are installed inside the heat exchange box. The heat exchange pipe fittings include an outlet pipe, an exchange pipe, and an inlet pipe. The outlet pipe and the inlet pipe are fixedly connected to the outlet end and the inlet end of the exchange pipe, respectively. The outlet pipe is close to the exhaust section, and the inlet pipe is close to the exhaust section. The exchange pipe includes several vertical pipe units and several curved pipe units. Every two adjacent vertical pipe units are fixedly connected by a curved pipe unit. Two cleaning units are symmetrically distributed on the left and right sides of the exchange tube inside the heat exchange box. Each cleaning unit includes a driving component, a moving component, and a cleaning component. Each driving component is installed inside a mechanical cover. The moving component is located on one side of the exchange tube inside the heat exchange box. The moving component is connected to the driving component through the mechanical port. The cleaning component is disposed in the gap of the exchange tube bundle. The left and right sides of the cleaning component are respectively connected to the two moving components. The driving component includes a worm, a worm wheel, a reciprocating rod, a slider, and a guide rail; the worm is simultaneously connected to both the driving structure and the separating structure, the driving structure is used to drive the worm to rotate, and the separating structure operates under the drive of the worm; The moving component is composed of multiple sets of shearing parts hinged together in sequence; the shearing parts include shearing plate one, shearing plate two, and connecting shaft. The moving component also includes several moving blocks. Each connecting shaft at the end of each set of shearing components below is fixedly connected to a moving block. The moving block is connected to a cleaning component located in the gap of the exchange tube bundle. The cleaning component includes two cleaning plates, several horizontal cleaning rods, and several vertical cleaning rods; the two cleaning plates have grooves along their length at the middle of their opposite ends, and the moving block is slidably embedded in the grooves; several horizontal cleaning rods and several vertical cleaning rods are equidistantly arranged between the two cleaning plates, and the horizontal and vertical cleaning rods are arranged horizontally and vertically intersecting; the outer walls of the horizontal and vertical cleaning rods are provided with several bristles, which are used to clean and remove impurities from the outer walls of the vertical pipe unit and the recessed areas of the outer walls of the curved pipe unit; The drive structure is installed at the top of the heat exchange box. The drive structure is used to drive the drive component in the cleaning unit. The drive component drives the cleaning component to move up and down through the moving component. The cleaning component moves up and down to clean the outer wall of the vertical pipe unit. The separation structure is located inside the air inlet and air extraction sections, and is used to separate dust from the exhaust gas.

2. The energy-saving heat exchange device for drying nonwoven fabrics according to claim 1, characterized in that, The worm gear meshes with the worm shaft, and the worm gear is coaxially fixed with the reciprocating rod. The reciprocating rod is rotatably mounted between two fixed lugs, which are symmetrically fixed to the upper end of the heat exchange box. The outer walls of the front and rear ends of the reciprocating rod are symmetrically provided with helical groove groups. The helical groove group includes two threaded grooves with the same pitch and opposite directions of rotation. Two sliders are symmetrically arranged at the front and rear ends of the reciprocating rod. The sliders are provided with crescent plates. The sliders form a sliding fit with the helical grooves on the surface of the reciprocating rod through the crescent plates. The rotation direction of the helical groove group is set so that the two sliders move in opposite directions. The guide rail is fixed between the two fixed lugs, and both sliders are slidably connected to the guide rail. The two sliders are connected to the moving parts passing through the mechanical port.

3. The energy-saving heat exchange device for drying nonwoven fabrics according to claim 2, characterized in that, The shearing plate one and shearing plate two are rotatably connected in the middle by a connecting shaft. Both ends of the shearing plate one and shearing plate two are rotatably connected to the connecting shaft. Adjacent shearing components are hinged to each other via the connecting shaft at their ends. The upper ends of shearing plates one and two of the uppermost shearing components both pass through the mechanical opening and are rotatably connected to the corresponding two sliders via connecting shafts.

4. The energy-saving heat exchange device for drying nonwoven fabrics according to claim 3, characterized in that, The drive structure includes a motor, gear one, gear two, and connecting rod one; the motor is installed on the upper end of the heat exchange box, gear one is fixedly connected to the output end of the motor, gear one meshes with gear two, gear two is coaxially fixed with the connecting rod, and the two ends of the connecting rod one extend into the interior of two mechanical covers respectively, and are fixedly connected to the worm gear of the drive component inside the mechanical cover.

5. The energy-saving heat exchange device for drying nonwoven fabrics according to claim 4, characterized in that, The extraction unit includes an extraction box, with several support rods fixed to the upper end of the extraction box, and a support plate fixed to the upper end of the support rods. An inlet hood is fixed to the right end of the extraction box, and a heat exchange box is fixed to the right end of the inlet hood. The inlet hood has a gradually changing structure that is narrower on the left and wider on the right. The separation structure includes an air extraction component and a separation component. The air extraction component is located inside the air extraction box, and the separation component is located inside the air inlet. The air extraction component includes a second connecting rod, a first bevel gear, a second bevel gear, a rotating rod, and a fan. One end of the second connecting rod is fixedly connected to a worm gear located on the same side of the air extraction section, and the other end of the second connecting rod is fixedly connected to the first bevel gear. The first bevel gear meshes with the second bevel gear, and the second bevel gear is rotatably mounted on the upper end of the support plate. A rotating rod is fixedly attached to the lower end of the second bevel gear, and the lower end of the rotating rod extends into the air extraction box and is fixedly connected to the fan. The lower end of the fan is connected to a separator inside the air intake section.

6. The energy-saving heat exchange device for drying nonwoven fabrics according to claim 5, characterized in that, The air intake section includes an air intake pipe, a separator pipe, and a chip removal pipe; the air intake pipe is eccentrically fixed to the side wall of the separator pipe, the separator pipe is fixedly installed at the lower end of the air extraction box, and the chip removal pipe is fixedly installed at the lower end of the separator pipe; The separating component includes a separating rod and a spiral separating blade; the separating rod is rotatably installed inside the separating tube, the separating rod is fixedly connected to the lower end of the fan, and the spiral separating blade is fixed to the side wall of the separating rod.

7. The energy-saving heat exchange device for drying nonwoven fabric according to claim 6, characterized in that, The exhaust box has an inlet on the side near the discharge hood at its rear end, and a filter plate is slidably and detachably installed at the inlet. The filter plate includes an outer frame and a filter screen. The filter screen is fixed in the outer frame, and a pull opening is provided through one side of the outer frame.

8. The energy-saving heat exchange device for drying nonwoven fabrics according to claim 7, characterized in that, The exhaust section includes an exhaust hood and an exhaust pipe; the left end of the exhaust hood is fixedly connected to a heat exchange box, and the right end of the exhaust hood is fixedly connected to an exhaust pipe; the exhaust hood has a gradually changing structure that is wider on the left and narrower on the right. A drain pipe is fixed at the bottom front end of the heat exchange box. The drain pipe is connected to a wastewater collection pipeline to discharge the condensate generated during the heat exchange process.

9. A method of using an energy-saving heat exchange device for drying non-woven fabrics, characterized in that, An energy-saving heat exchange device for drying nonwoven fabrics as described in claim 8 includes the following steps: Step 1: Start the motor of the drive structure. The motor drives gear 2 to rotate through gear 1. Gear 2 drives connecting rod 1 to rotate. Connecting rod 1 drives the worm gears inside the two mechanical covers to rotate. Step 2: The worm gear drives the drive unit of the cleaning unit to run. The drive unit drives the moving part to extend and retract. The moving part drives the cleaning part to move up and down back and forth. The bristles on the cleaning part, together with the condensate generated during the heat exchange process, clean and remove impurities from the outer wall of the vertical tube unit. Step 3: The worm gear simultaneously drives the separation structure to operate. The suction component of the separation structure generates negative pressure in the suction section, drawing the exhaust gas from the intake section. The separation component of the separation structure separates the exhaust gas into dust, and the separated dust is discharged from the chip discharge pipe. Step 4: The exhaust gas enters the heat exchange box through the extraction section, flows through the inside of the exchange tube, and exchanges heat with the medium in the heat exchange box. The gas after heat exchange is discharged from the exhaust section, and the condensate generated during the heat exchange process is discharged from the drain pipe.

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