A waste heat treatment device for flue gas from a heating furnace

Abstract

This invention discloses a waste heat treatment device for flue gas from a heating furnace, specifically relating to the field of waste heat treatment technology for flue gas. The invention incorporates a clearing unit. The outer side of the air inlet moves towards the direction of the conical slot, and the front end of the air inlet enters the clamping cavity within the exhaust channel until the end of the air inlet abuts against the clamping cavity. A blocking block closes the upper end of the channel. As the front end of the air inlet advances forward, the corrugated pipe extends, maintaining the continuity and sealing of the flue gas passage and preventing air leakage at the connection due to assembly deviations, thermal expansion and contraction, or equipment vibration. The clearing unit descends, allowing the blocking block and its cleaning component to pass through the channel and enter the air inlet, accurately aligning with the filter screen position. The cleaning component then moves laterally towards the filter screen, pushing and clearing the holes and grooves on the filter screen surface, causing impurities attached to the filter screen to detach from the filter screen surface, restoring the filter screen's ventilation capacity, and improving the continuous operation capability and waste heat recovery efficiency of the device.

Description

Technical Field

[0001] This invention relates to the field of flue gas waste heat treatment technology, specifically to a waste heat treatment device for flue gas from a heating furnace. Background Technology

[0002] Heating furnaces are widely used in industrial production processes such as metallurgy, machining, chemical engineering, and building materials. They are mainly used for heating, holding, or heat-treating steel billets, metal workpieces, raw materials, or semi-finished products. During operation, heating furnaces typically use natural gas, oil, coal gas, or other fuels as a heat source, producing a large amount of high-temperature flue gas after combustion. This flue gas still contains a significant amount of sensible heat. If it is directly discharged through the flue, it will not only waste energy but also increase the exhaust temperature, increasing the processing load on subsequent dust removal, desulfurization, denitrification, and flue gas emission systems.

[0003] Because the flue gas from heating furnaces typically carries dust, scale, oil particles, and corrosive gases, these impurities easily adhere to the airflow channels or heat exchange surfaces as the flue gas enters the waste heat recovery equipment and passes through heat exchange tubes, heat exchange plates, filters, or heat storage bodies. This forms ash accumulation, scale, or an adhesion layer, leading to increased flue gas flow resistance and a gradual decrease in heat exchange efficiency. If not cleaned for a long time, it may also cause local blockages, affecting the stability of flue gas emissions and the continuous operation of the waste heat recovery device. At the same time, the existing exhaust channels and waste heat treatment boxes are mostly fixed connections. Due to assembly errors, thermal expansion and contraction, or equipment vibration, misalignment, loosening, or smoke leakage problems can easily occur at the connection points, further affecting the sealing and safety of flue gas transportation. Summary of the Invention

[0004] The purpose of this invention is to provide a waste heat treatment device for flue gas from a heating furnace to solve the problems mentioned in the background art.

[0005] The main technical problem solved by this invention is: Impurities in flue gas adhere to the airflow channels or heat exchange surfaces, forming ash accumulation, which increases the resistance to flue gas flow, gradually reduces the heat exchange efficiency, and affects the stability of flue gas emissions and the efficiency of waste heat recovery. The existing exhaust channels and waste heat treatment boxes are mostly fixed connections, which are prone to misalignment, loosening or smoke leakage, further affecting the sealing of flue gas transportation.

[0006] This invention can be achieved through the following technical solutions: A waste heat treatment device for flue gas from a heating furnace includes a heating furnace body. One side of the heating furnace body is provided with an exhaust channel for discharging waste heat flue gas. A waste heat box is connected to one side of the exhaust channel. An airflow channel that is inserted and matched with the exhaust channel is fixedly provided on one side of the top of the waste heat box. The airflow channel includes a connecting port located at the top of the waste heat box and communicating with its interior. An air guide port is movably sleeved on the outside of the connecting port. The interior of the air guide port is provided with a clearance cavity for insertion of the connecting port. The end of the clearance cavity is provided with a corrugated pipe fixedly connected to the end face of the connecting port. A filter screen is provided on the inner edge of the air inlet; The exhaust channel is equipped with a cleaning unit that moves up and down to clean the filter surface. The exhaust channel has a tapered slot at its end, and the interior of the exhaust channel has a locking cavity that communicates with the tapered slot and engages with the end of the air inlet. The upper end of the air inlet is provided with a channel for the vertical passage of the unblocking unit; The unblocking unit includes a push plate located in the cavity at the top of the exhaust channel and moving in a vertical direction. The bottom surface of the push plate is fixed with a blockage block to seal the cavity, and a cleaning component for unblocking the holes and grooves on the surface of the filter screen is slidably installed on the side of the push plate. When snapped in place, the plug is positioned directly above the through slot.

[0007] A further technical improvement of the present invention is that the unblocking unit also includes a vertical electric cylinder disposed on the top surface of the cavity, wherein the pushing end of the vertical electric cylinder is fixed to the upper end surface of the push plate; The cleaning component includes a horizontal electric cylinder, the pushing end of which is fixed with a moving plate, and the surface of the moving plate is provided with a plurality of unblocking components that unclog the holes and grooves on the surface of the filter screen.

[0008] A further technical improvement of the present invention is that: the bottom surface of the exhaust channel is provided with a snap-fit ​​seat communicating with its inner cavity, and a chip collection box for intercepting and collecting impurities from the filter screen is snapped into the inside of the snap-fit ​​seat.

[0009] A further technical improvement of the present invention is that: the upper part of the inner wall surface of the chip collection box is provided with a guide protrusion that fits and contacts the bottom surface of the snap-fit ​​seat, the upper part of the guide protrusion is provided with an upper slope, and the lower part of the guide protrusion is provided with a lower slope, and the inclination directions of the upper slope and the lower slope are opposite.

[0010] A further technical improvement of the present invention is that: the bottom surface of the snap-fit ​​base is provided with a mating interface for insertion into the upper end of the chip collection box; the inner walls on both sides of the upper part of the chip collection box are respectively provided with positioning grooves; and both sides of the snap-fit ​​base are provided with a spring-loaded insertion member that is inserted into the corresponding positioning groove.

[0011] A further technical improvement of the present invention is that: the clamping member includes a positioning rod disposed in the inner cavity of the snap-fit ​​seat and inserted into the corresponding positioning groove, the outer side of the positioning rod is fixed with a protruding ring, and a spring is sleeved on the outer side of the positioning rod near the protruding ring, the end of the spring being fixed to the inner cavity of the snap-fit ​​seat.

[0012] A further technical improvement of the present invention is that: a synchronous cylinder is provided on the upper and lower sides of the top of the waste heat box near the communication port, and the pushing end of the synchronous cylinder is fixed to the end face of the air guide port.

[0013] A further technical improvement of the present invention is that: a heat exchange plate one is provided at the top of the inner cavity of the waste heat box, and a heat exchange plate two is provided on the lower side of the heat exchange plate one and installed on the inner wall of the waste heat box; the heat exchange plate two is inclined downward towards the side close to the communication port. The first heat exchange plate and the second heat exchange plate are tilted in opposite directions, and the surfaces of both the first heat exchange plate and the second heat exchange plate are smooth.

[0014] A further technical improvement of the present invention is that: a chip guide plate is provided above the inner cavity of the waste heat box and below the heat exchange plate one and the heat exchange plate two, and a stepped block with opposite inclination direction is provided in the middle of the upper end surface of the chip guide plate; The surface of the waste heat box is provided with a discharge groove that is flush with the upper surface of the chip guide plate, and a blocking plate is installed in the discharge groove.

[0015] Compared with the prior art, the present invention has the following beneficial effects: 1. By setting up a clearing unit, the outer side of the air inlet moves towards the conical slot, and the front end of the air inlet enters the clamping cavity in the exhaust channel until the end of the air inlet abuts against the clamping cavity. The block closes the upper end of the through slot. When the front end of the air inlet moves forward, the corrugated pipe extends, maintaining the continuity and sealing of the flue gas passage through the corrugated pipe, avoiding air leakage at the connection due to assembly deviation, thermal expansion and contraction, or equipment vibration. The clearing unit descends, allowing the block and its cleaning component to pass through the through slot and enter the air inlet, accurately corresponding to the filter screen position, facilitating the cleaning of the filter screen. During this process, the cleaning component does not move laterally. After reaching the height of the filter screen, the cleaning component moves laterally towards the filter screen, pushing and clearing the holes and grooves on the filter screen surface, causing impurities attached to the filter screen to detach from the filter screen surface, thereby restoring the airflow capacity of the filter screen and improving the continuous operation capacity and waste heat recovery efficiency of the waste heat treatment device. 2. By setting up a snap-fit ​​chip collection box, it is easy to quickly snap the chip collection box together. The dust, slag particles or clumps of impurities that are pushed out will fall off the filter screen surface and fall into the chip collection box under the action of gravity, realizing the combination of filter screen unblocking and impurity collection. Since the upper slope has a guiding effect, it guides the falling clumps of impurities into the chip collection box, reducing the amount of impurities remaining at the opening of the chip collection box. When emptying the clumps of impurities in the chip collection box, the lower slope can guide the direction of impurity discharge, making it easier for clumps of impurities to slide out of the chip collection box along the lower slope, reducing the situation of impurities getting stuck on the inner wall of the chip collection box, and improving the cleaning convenience of the chip collection box. 3. Through heat exchange plates one and two with opposite inclinations, the flue gas forms a baffle path under the obstruction and guidance of heat exchange plates one and two, thereby prolonging the residence time of the flue gas in the waste heat box and improving the heat exchange effect between the flue gas and the heat exchange plates. Due to the smooth surface design, it is not easy to adhere to the heat exchange plates, but slides down along the inclined surface of the heat exchange plates under the action of gravity, and the falling dust and impurities are caught by the chip guide plate; that is, the stepped blocks with opposite inclinations divert and guide the falling dust and impurities, reducing the accumulation of dust in the middle of the chip guide plate. Attached Figure Description

[0016] To facilitate understanding by those skilled in the art, the present invention will be further described below with reference to the accompanying drawings.

[0017] Figure 1 This is a schematic diagram of the external structure of the present invention; Figure 2 This is a schematic diagram of the installation structure of the exhaust port and the air guide port of the present invention; Figure 3 For the present invention Figure 2 A magnified view of a section at point A in the middle; Figure 4 For the present invention Figure 2 A magnified view of a section at point B in the middle; Figure 5 For the present invention Figure 2 A magnified view of a section at point C.

[0018] In the diagram: 1. Heating furnace body; 2. Waste heat box; 3. Exhaust channel; 4. Air vent; 5. Chip guide plate; 6. Heat exchange plate one; 7. Heat exchange plate two; 8. Chip collection box; 9. Guide protrusion; 10. Snap-fit ​​seat; 11. Connecting interface; 12. Positioning rod; 13. Spring; 14. Positioning groove; 15. Vertical electric cylinder; 16. Push plate; 17. Block; 18. Through groove; 19. Clamping cavity; 20. Filter screen; 21. Conical slot; 22. Synchronous cylinder; 23. Connecting port; 24. Corrugated pipe fitting; 25. Relief cavity; 26. Horizontal electric cylinder; 27. Moving plate; 28. Unblocking component. Detailed Implementation

[0019] To further illustrate the technical means and effects of the present invention in achieving its intended purpose, the following detailed description of the specific implementation methods, structures, features, and effects of the present invention, in conjunction with the accompanying drawings and preferred embodiments, is provided.

[0020] Please see Figures 1-5 As shown, the present invention provides a waste heat treatment device for flue gas from a heating furnace, including a heating furnace body 1. An exhaust channel 3 for discharging waste heat flue gas is provided on one side of the heating furnace body 1. A waste heat box 2 is connected to one side of the exhaust channel 3. An airflow channel that is inserted and matched with the exhaust channel 3 is fixedly provided on the top side of the waste heat box 2. The airflow channel includes a connecting port 23 located on the top of the waste heat box 2 and communicating with its interior. An air guide port 4 is movably sleeved on the outside of the connecting port 23. The interior of the air guide port 4 is provided with a relief cavity 25 for insertion of the connecting port 23. The end of the relief cavity 25 is provided with a corrugated pipe fitting 24 fixedly connected to the end face of the connecting port 23. A filter screen 20 is provided on the inner edge of the air inlet 4; The internal lifting mechanism of the exhaust channel 3 is equipped with a cleaning unit for cleaning the surface of the filter screen 20; The exhaust channel 3 has a tapered slot 21 at its end, and the interior of the exhaust channel 3 has a locking cavity 19 that communicates with the tapered slot 21 and engages with the end of the air inlet 4. A through groove 18 is provided above the end of the air inlet 4 for the vertical passage of the unblocking unit; The unblocking unit includes a push plate 16 located in the cavity at the top of the exhaust channel 3 and moving in the vertical direction. A block block 17 for sealing the cavity is fixed on the bottom surface of the push plate 16, and a cleaning component for unblocking the holes and grooves on the surface of the filter screen 20 is slidably installed on the side of the push plate 16. When the plug is engaged, the plug 17 is located directly above the through slot 18.

[0021] During use, by pushing the air inlet 4, the air inlet 4 slides outside the connecting port 23. At this time, the outer side of the air inlet 4 moves towards the conical slot 21, and the front end of the air inlet 4 enters the clamping cavity 19 in the exhaust channel 3 until the end of the air inlet 4 abuts against the clamping cavity 19. At this time, the outer wall of the air inlet 4 fits against the conical slot 21, so that the exhaust channel 3 and the air inlet 4 are stably connected. When the heating furnace body 1 is working, the combustion air intake channel is kept unobstructed, and the air intake volume is adjusted by the fan. The generated flue gas enters the waste heat box 2 through the exhaust channel 3, the air inlet 4, and the connecting port 23 in sequence. At this time, the through slot 18 reaches directly below the unblocking unit, that is, the upper end of the through slot 18 is closed by the block 17.

[0022] When the front end of the air inlet 4 moves forward, the corrugated pipe 24 elongates. The corrugated pipe 24 maintains the connection and seal of the flue gas passage, avoiding air leakage at the connection due to assembly deviation, thermal expansion and contraction or equipment vibration. The air inlet 4 maintains a reliable fit with the exhaust channel 3, reducing deformation at the connection.

[0023] When the flue gas enters the inlet 4, it first passes through the filter screen 20 on the inner edge of the inlet 4 to intercept impurities such as dust, particulate matter, and slag debris carried in the flue gas, reducing the amount of impurities entering the waste heat box 2. This reduces the possibility of ash accumulation and blockage inside the waste heat box 2, ensuring the stable operation of the waste heat recovery process and reducing the risk of ash accumulation, blockage, and decreased heat exchange efficiency inside the waste heat box 2.

[0024] As usage time increases, the ventilation capacity of filter 20 decreases, and the unblocking unit descends, allowing the blockage block 17 and its cleaning component to pass through the channel 18 and enter the air inlet 4, accurately aligning with the position of filter 20 for easy cleaning. During this process, the cleaning component does not move laterally. After reaching the height of filter 20, the cleaning component moves laterally towards filter 20, pushing and unblocking the holes and grooves on the surface of filter 20, causing impurities attached to filter 20 to detach from the surface of filter 20, thereby restoring the ventilation capacity of filter 20 and improving the continuous operation capability and waste heat recovery efficiency of the waste heat treatment device.

[0025] After cleaning, the cleaning component leaves the filter screen 20, the push plate 16 returns to its original position, and the block 17 returns to the top cavity of the exhaust channel 3 with the push plate 16 to seal the cavity, preventing smoke from entering the cavity and preventing dust from accumulating at the installation position of the unblocking unit, ensuring that the unblocking unit can continue to operate normally in the future.

[0026] See Figure 4 As shown, the unblocking unit also includes a vertical electric cylinder 15 disposed on the top surface of the cavity, and the pushing end of the vertical electric cylinder 15 is fixed to the upper end surface of the push plate 16. The cleaning component includes a horizontal electric cylinder 26, and a moving plate 27 is fixed to the pushing end of the horizontal electric cylinder 26. The surface of the moving plate 27 is provided with a number of unblocking components 28 that unclog the holes and grooves on the surface of the filter screen 20.

[0027] When the filter screen 20 needs to be cleaned, the vertical electric cylinder 15 is activated, and its pushing end extends downward, driving the push plate 16 to descend vertically. Since the block 17 is located directly above the through groove 18 in the snap-fit ​​state, when the push plate 16 descends, the block 17 and the cleaning component installed on the side of the push plate 16 enter the air inlet 4 through the through groove 18 and approach the surface of the filter screen 20.

[0028] After the vertical electric cylinder 15 sends the cleaning component into the air inlet 4, the horizontal electric cylinder 26 is activated, pushing the moving plate 27 toward the filter screen 20, so that multiple unclogging components 28 respectively contact the holes and grooves on the surface of the filter screen 20, pushing, peeling and unclogging the dust, particles or clumps of impurities blocked in the holes and grooves of the filter screen 20, so that the holes and grooves of the filter screen 20 are reopened and the unclogging efficiency is improved.

[0029] See Figure 2 and Figure 3 As shown, the bottom surface of the exhaust channel 3 is provided with a snap-fit ​​seat 10 that communicates with its inner cavity. Inside the snap-fit ​​seat 10, there is a chip collection box 8 that intercepts and collects impurities from the filter screen 20. The inner wall of the chip collection box 8 is provided with a guide protrusion 9 that fits and contacts the bottom surface of the card seat 10. The upper part of the guide protrusion 9 is provided with an upper slope, and the lower part of the guide protrusion 9 is provided with a lower slope. The inclination directions of the upper slope and the lower slope are opposite.

[0030] During normal smoke exhaust, when the flue gas passes through the filter screen 20 inside the air inlet 4, the particulate impurities in the flue gas are blocked by the filter screen 20. Some impurities will fall downwards under the action of gravity and enter the dust collection box 8 through the opening on the bottom surface of the exhaust channel 3, thus preventing impurities from accumulating in the exhaust channel 3 or the air inlet 4 for a long time.

[0031] When the unblocking unit is working, the vertical electric cylinder 15 drives the push plate 16 and the cleaning component to descend, and the horizontal electric cylinder 26 pushes the moving plate 27 and the unblocking component 28 to move towards the filter screen 20. The unblocking component 28 pushes and unblocks the holes and grooves on the surface of the filter screen 20. The dust, slag particles or clumps of impurities that are pushed out will fall off the surface of the filter screen 20 and fall into the chip collection box 8 under the action of gravity, thus realizing the combination of unblocking the filter screen 20 and collecting impurities.

[0032] Because the upper slope has a guiding function, it guides the falling clumps of impurities into the box, reducing the amount of impurities remaining at the opening of the chip collection box 8. When the box is full, the chip collection box 8 is removed. The lower slope has the opposite inclination direction to the upper slope. Therefore, when emptying the clumps of impurities from the chip collection box 8, the lower slope can guide the direction of impurity discharge, making it easier for the clumps of impurities to slide out of the chip collection box 8 along the lower slope. This reduces the situation where impurities get stuck on the inner wall of the chip collection box 8 or at the guide protrusion 9, and improves the ease of cleaning the chip collection box 8.

[0033] See Figure 3 As shown, the bottom surface of the card holder 10 is provided with a mating interface 11 for inserting the upper end of the chip collection box 8. The inner walls on both sides of the upper part of the chip collection box 8 are respectively provided with positioning grooves 14. Both sides of the card holder 10 are provided with elastically reset inserts that insert into the corresponding positioning grooves 14. The insertion member includes a positioning rod 12 disposed in the internal cavity of the snap-fit ​​seat 10 and inserted into the corresponding positioning groove 14. A protruding ring is fixed to the outside of the positioning rod 12, and a spring 13 is sleeved on the outside of the positioning rod 12 near the outer side of the protruding ring. The end of the spring 13 is fixed to the internal cavity of the snap-fit ​​seat 10.

[0034] When installing the chip collection box 8, push the positioning rod 12 to retract into the snap-fit ​​seat 10. At this time, the positioning rod 12 drives the convex ring to compress the spring 13. Then, insert the upper end of the chip collection box 8 into the interface 11. At this time, the positioning groove 14 corresponds to the position of the positioning rod 12. Remove the pushing force of the positioning rod 12, and the spring 13 releases its elastic force, pushing the convex ring and the positioning rod 12 to reset, so that the end of the positioning rod 12 automatically inserts into the corresponding positioning groove 14. After the positioning rod 12 is inserted into the positioning groove 14, it can limit the chip collection box 8, so that the chip collection box 8 is stably kept in the snap-fit ​​seat 10 and is not easy to fall off by itself due to equipment vibration, flue gas impact or increased weight of impurities.

[0035] When the chip collection box 8 is full of clumps and impurities and needs to be cleaned, the operator can pull outward or release the positioning rod 12 from the insertion position, so that the positioning rod 12 can be removed from the positioning groove 14, and then the chip collection box 8 can be removed from the interface 11.

[0036] See Figure 2 and Figure 5 As shown, the top of the waste heat box 2 is equipped with a synchronizing cylinder 22 on both the upper and lower sides near the connecting port 23. The pushing end of the synchronizing cylinder 22 is fixed to the end face of the air guide port 4.

[0037] When it is necessary to connect the waste heat box 2 with the exhaust channel 3, the upper and lower synchronous cylinders 22 extend synchronously, pushing the air guide port 4 towards the exhaust channel 3. During the movement, the end of the air guide port 4 enters along the conical slot 21 at the end of the exhaust channel 3 and further inserts into the locking cavity 19 to form a locking fit. At this time, the air guide port 4, the connecting port 23, and the exhaust channel 3 are connected, and the flue gas generated by the heating furnace body 1 smoothly enters the waste heat box 2 for waste heat treatment.

[0038] See Figure 2 As shown, a heat exchange plate 6 is provided at the top of the inner cavity of the waste heat box 2, and a heat exchange plate 7 is provided on the lower side of the heat exchange plate 6 and installed on the inner wall of the waste heat box 2. The heat exchange plate 7 is inclined downward towards the side close to the communication port 23. The inclination directions of heat exchange plate 6 and heat exchange plate 7 are opposite, and the surfaces of both heat exchange plate 6 and heat exchange plate 7 are smooth. A chip guide plate 5 is provided above the inner cavity of the waste heat box 2 and below the heat exchange plate 6 and the heat exchange plate 7. A stepped block with opposite inclination is provided in the middle of the upper end face of the chip guide plate 5. The surface of the waste heat box 2 is provided with a discharge groove that is flush with the upper surface of the chip guide plate 5, and a blocking plate is installed in the discharge groove.

[0039] After the flue gas enters the waste heat box 2 through the connecting port 23, it forms a baffle path under the blocking and guiding effect of heat exchange plate 6 and heat exchange plate 7, thereby prolonging the residence time of the flue gas in the waste heat box 2 and improving the heat exchange effect between the flue gas and the heat exchange plate.

[0040] Meanwhile, the surfaces of heat exchange plate 6 and heat exchange plate 7 are both smooth. When residual dust or agglomerated impurities in the flue gas come into contact with the heat exchange plate surface, they are not easy to adhere to the heat exchange plate. Instead, they slide down the inclined heat exchange plate surface under the action of gravity, and the sliding dust and impurities are received by the guide plate 5. That is, the stepped blocks with opposite inclination directions divert and guide the falling dust and impurities, reducing the accumulation of dust in the middle of the guide plate 5.

[0041] During normal operation, the blocking plate seals the discharge trough to prevent flue gas leakage. When it is necessary to clean the ash and debris inside the waste heat box 2, the blocking plate rises to open the discharge trough, allowing the ash and debris on the guide plate 5 to be discharged from the waste heat box 2 along the guide plate 5 and through the discharge trough. After cleaning, the blocking plate resets to close the discharge trough. This improves the heat exchange efficiency of the waste heat box 2, facilitates the discharge of internal ash and debris, and reduces the impact of ash accumulation on heat exchange efficiency.

[0042] In use, this invention, by setting up a clearing unit, moves the outer side of the air inlet 4 towards the conical slot 21, and the front end of the air inlet 4 enters the retaining cavity 19 in the exhaust channel 3 until the end of the air inlet 4 abuts against the retaining cavity 19. The blocking block 17 then closes the upper end of the through slot 18. As the front end of the air inlet 4 moves forward, the corrugated pipe 24 extends, maintaining the continuity and sealing of the flue gas passage through the corrugated pipe 24, preventing air leakage at the connection due to assembly deviations, thermal expansion and contraction, or equipment vibration. The clearing unit descends, allowing... The blockage block 17 and its cleaning component pass through the channel 18 and enter the air inlet 4, accurately corresponding to the position of the filter screen 20, which facilitates the cleaning of the filter screen 20. During this process, the cleaning component does not move laterally. After reaching the height of the filter screen 20, the cleaning component moves laterally towards the filter screen 20, pushing and clearing the holes and grooves on the surface of the filter screen 20, so that the impurities attached to the filter screen 20 are removed from the surface of the filter screen 20, thereby restoring the ventilation capacity of the filter screen 20 and improving the continuous operation capacity and waste heat recovery efficiency of the waste heat treatment device. By setting up a snap-fit ​​chip collection box 8, it is easy to quickly snap the chip collection box 8. The dust, slag particles or clumps of impurities that are pushed out will fall off the surface of the filter screen 20 and fall into the chip collection box 8 under the action of gravity, realizing the combination of unclogging the filter screen 20 and collecting impurities. Since the upper slope has a guiding effect, it guides the falling clumps of impurities into the box, reducing the amount of impurities remaining at the opening of the chip collection box 8. When emptying the clumps of impurities in the chip collection box 8, the lower slope can guide the discharge direction of the impurities, making it easier for the clumps of impurities to slide out of the chip collection box 8 along the lower slope, reducing the situation of impurities getting stuck on the inner wall of the chip collection box 8, and improving the cleaning convenience of the chip collection box 8. Through the heat exchange plates 6 and 7 with opposite inclinations, the flue gas forms a baffle path under the obstruction and guidance of the heat exchange plates 6 and 7, thereby prolonging the residence time of the flue gas in the waste heat box 2 and improving the heat exchange effect between the flue gas and the heat exchange plates. Due to the smooth surface design, it is not easy to adhere to the heat exchange plates, but slides down along the inclined surface of the heat exchange plates under the action of gravity, and the falling dust and impurities are received by the chip guide plate 5; that is, the stepped blocks with opposite inclinations divert and guide the falling dust and impurities, reducing the accumulation of dust in the middle of the chip guide plate 5.

[0043] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A waste heat treatment device for flue gas from a heating furnace, comprising a heating furnace body (1), characterized in that: The heating furnace body (1) has an exhaust channel (3) for discharging waste heat flue gas on one side. A waste heat box (2) is connected to one side of the exhaust channel (3). An airflow channel that is inserted into and cooperates with the exhaust channel (3) is fixed on one side of the top of the waste heat box (2). The airflow channel includes a connecting port (23) located at the top of the waste heat box (2) and communicating with its interior. An air guide port (4) is movably sleeved on the outside of the connecting port (23). The air guide port (4) has a relief cavity (25) inside for the insertion of the connecting port (23). The end of the relief cavity (25) is provided with a corrugated pipe fitting (24) fixedly connected to the end face of the connecting port (23). The air inlet (4) is provided with a filter screen (20) on its inner edge; The exhaust channel (3) is equipped with a cleaning unit for cleaning the surface of the filter screen (20) by lifting and lowering the interior. The exhaust channel (3) has a tapered slot (21) at its end, and the exhaust channel (3) has a locking cavity (19) inside that communicates with the tapered slot (21) and engages with the end of the air inlet (4). The air inlet (4) is provided with a through groove (18) above the end for the vertical passage of the unblocking unit. The unblocking unit includes a push plate (16) located in the cavity at the top of the exhaust channel (3) and moving in the vertical direction. The bottom surface of the push plate (16) is fixed with a block (17) to seal the cavity, and a cleaning component for unblocking the holes and grooves on the surface of the filter screen (20) is slidably installed on the side of the push plate (16). When the plug is engaged, the plug (17) is located directly above the through slot (18).

2. The waste heat treatment device for flue gas from a heating furnace according to claim 1, characterized in that, The unblocking unit also includes a vertical electric cylinder (15) installed on the top surface of the cavity, and the pushing end of the vertical electric cylinder (15) is fixed to the upper end surface of the push plate (16); The cleaning component includes a horizontal electric cylinder (26), the pushing end of which is fixed with a moving plate (27), and the surface of the moving plate (27) is provided with a plurality of unblocking components (28) that unclog the holes and grooves on the surface of the filter screen (20).

3. The waste heat treatment device for heating furnace flue gas according to claim 1, characterized in that, The bottom surface of the exhaust channel (3) is provided with a snap-fit ​​seat (10) communicating with its inner cavity. The snap-fit ​​seat (10) is fitted with a chip collection box (8) for intercepting and collecting impurities from the filter screen (20).

4. The waste heat treatment device for flue gas from a heating furnace according to claim 3, characterized in that, The inner wall of the chip collection box (8) is provided with a guide protrusion (9) that is in contact with the bottom surface of the card holder (10). The upper part of the guide protrusion (9) is provided with an upper slope, and the lower part of the guide protrusion (9) is provided with a lower slope. The inclination directions of the upper slope and the lower slope are opposite.

5. The waste heat treatment device for flue gas from a heating furnace according to claim 3, characterized in that, The bottom surface of the card holder (10) is provided with a mating interface (11) for inserting the chip collection box (8) into the upper end. The inner walls of the upper two sides of the chip collection box (8) are respectively provided with positioning grooves (14). Both sides of the card holder (10) are provided with elastically reset inserts that insert into the corresponding positioning grooves (14).

6. The waste heat treatment device for heating furnace flue gas according to claim 5, characterized in that, The insertion member includes a positioning rod (12) disposed in the inner cavity of the snap-fit ​​seat (10) and inserted into the corresponding positioning groove (14). A protruding ring is fixed on the outside of the positioning rod (12), and a spring (13) is sleeved on the outside of the positioning rod (12) near the outer side of the protruding ring. The end of the spring (13) is fixed to the inner cavity of the snap-fit ​​seat (10).

7. The waste heat treatment device for heating furnace flue gas according to claim 1, characterized in that, The top of the waste heat box (2) is provided with a synchronous cylinder (22) on the upper and lower sides near the connecting port (23), and the pushing end of the synchronous cylinder (22) is fixed to the end face of the air guide port (4).

8. The waste heat treatment device for heating furnace flue gas according to claim 1, characterized in that, The top of the inner cavity of the waste heat box (2) is provided with a heat exchange plate one (6), and a heat exchange plate two (7) installed on the inner wall of the waste heat box (2) is provided on the lower side of the heat exchange plate one (6). The heat exchange plate two (7) is inclined downward towards the side close to the communication port (23). The inclination directions of heat exchange plate one (6) and heat exchange plate two (7) are opposite, and the surfaces of heat exchange plate one (6) and heat exchange plate two (7) are both smooth.

9. The waste heat treatment device for flue gas from a heating furnace according to claim 8, characterized in that, A chip guide plate (5) is provided above the inner cavity of the waste heat box (2) and below the heat exchange plate one (6) and the heat exchange plate two (7). A step block with opposite inclination is provided in the middle of the upper end face of the chip guide plate (5). The surface of the waste heat box (2) is provided with a discharge groove that is flush with the upper surface of the chip guide plate (5), and a blocking plate is installed in the discharge groove.

Images