Energy-saving boiler tail gas waste heat recovery device

Abstract

The invention discloses an energy-saving boiler tail gas waste heat recovery device, and relates to the technical field of energy engineering, the energy-saving boiler tail gas waste heat recovery device comprises a base, a boiler body is fixedly connected to the base, a heating cylinder is fixedly connected to the front side of the boiler body, an exhaust pipe penetrates through the front side of the boiler body, and the exhaust pipe is arranged in the heating cylinder; a first air inlet pipe is fixedly connected to the top of the circumference of the heating cylinder, the other end of the first air inlet pipe communicates with the boiler body, a protection base is fixedly connected to the front face of the base, a suction fan is fixedly connected to the upper end of the protection base, an air guide cylinder is fixedly connected to the upper end of the suction fan, and the top of the air guide cylinder communicates with the heating cylinder. The outer wall of the exhaust pipe is sleeved with the heating cylinder, so that air entering the boiler can make contact with the outer wall of the exhaust pipe, the high-temperature exhaust pipe can heat the air, and the air entering the boiler has the high temperature.

Description

Technical Field

[0001] The present invention relates to the technical field of energy engineering, and in particular to an energy-saving boiler tail gas waste heat recovery device. Background Art

[0002] Boiler exhaust heat recovery devices are a mature and efficient technology in the field of industrial energy conservation. By capturing waste heat from boiler exhaust gases and using it to preheat boiler feed water or combustion air, they significantly reduce fuel consumption, operating costs and greenhouse gas emissions, and have important economic value and environmental significance.

[0003] Patent publication number CN203384961U relates to a boiler exhaust waste heat recovery device, which includes: a flue, a composite phase-change heat exchanger installed in the flue, and an air preheater. The flue includes a vertical flue and a horizontal flue perpendicular to the vertical flue. The air preheater includes a first air preheater installed in the vertical flue and a second air preheater installed in the horizontal flue. The composite phase-change heat exchanger is installed between the end of the horizontal flue and the rear of the second air preheater. The boiler exhaust waste heat recovery device of this patent can fully utilize waste heat, reduce production costs, significantly reduce exhaust gas temperature, and reduce environmental thermal pollution.

[0004] However, the existing waste heat recovery device is difficult to heat the incoming air, which will cause the cooled air to directly enter the interior of the boiler, causing heat loss inside the boiler. When the incoming air is heated by the discharged waste heat, the dust in the air will adhere to the surface of the exhaust pipe, thereby affecting the heating effect of the waste heat on the exhaust pipe surface on the air. Summary of the Invention

[0005] (1) Technical problems solved

[0006] In view of the deficiencies in the prior art, the present invention provides an energy-saving boiler tail gas waste heat recovery device, which solves the problems raised in the above background technology.

[0007] (2) Technical solution

[0008] To achieve the above objectives, the present invention is implemented through the following technical solutions: an energy-saving boiler exhaust waste heat recovery device, comprising a base, a boiler body is fixedly connected to the base, a heating cylinder is fixedly connected to the front of the boiler body, an exhaust pipe is passed through the front of the boiler body, the exhaust pipe is arranged inside the heating cylinder, a No. 1 air intake pipe is fixedly connected to the top of the circumference of the heating cylinder, the other end of the No. 1 air intake pipe is connected to the boiler body, a protective seat is fixedly connected to the front of the base, a suction fan is fixedly connected to the upper end of the protective seat, an air duct is fixedly connected to the upper end of the suction fan, the top of the air duct is connected to the heating cylinder, and a removal device is provided inside the air duct;

[0009] The removal device includes a No. 1 rotating shaft, a No. 1 helical gear, a No. 2 helical gear, a reciprocating screw, a square nut, a fixed rod and a coaxial push ring, the bottom of the No. 1 rotating shaft is fixedly connected to the top of the output end of the suction fan, the No. 1 helical gear is fixedly connected to the top of the No. 1 rotating shaft, the reciprocating screw is rotatably connected to the front side of the base, the No. 2 helical gear is fixedly connected to the circumferential surface of the reciprocating screw, the No. 2 helical gear is meshed with the No. 1 helical gear, the square nut is threadedly connected to the circumferential surface of the reciprocating screw, the fixed rod is fixedly connected to the top of the square nut, the coaxial push ring is fixedly connected to the top of the fixed rod, and the coaxial push ring is slidably connected to the exhaust pipe. When the waste heat is discharged from the inside of the exhaust pipe and the suction fan is started to work, the suction fan drives the No. 1 rotating shaft to rotate, the No. 1 rotating shaft drives the No. 1 helical gear to rotate, and the No. 1 helical gear drives the No. 2 helical gear meshed with it to rotate.

[0010] According to the above scheme, a sliding groove is provided on the circumferential surface of the reciprocating screw, and a slider No. 1 is slidably installed inside the sliding groove, and the slider No. 1 is rotatably connected to the square nut. A driven rotating ring is rotatably installed on the left side of the coaxial push ring, and the circumferential surface of the driven rotating ring is fixedly connected to the fan blade. The driven rotating ring is connected to the slider No. 1 through a synchronous belt. The reciprocating screw rotates, and the rotation of the reciprocating screw drives the square nut to move forward. The rotation of the reciprocating screw drives the sliding groove to rotate, and the rotation of the sliding groove will drive the rotation of slider No. 1.

[0011] According to the above scheme, a filter box is fixedly installed at the bottom of the heating cylinder, and the filter box is connected to the air inlet position of the suction fan through a Y-shaped air inlet pipe. A dust removal device is provided inside the filter box, and the dust removal device includes a No. 2 screw, a pinion, a rack, a No. 2 nut, a U-shaped rod, a No. 1 baffle plate, a No. 2 baffle plate, a No. 3 baffle plate, a brush plate and a filter plate. The No. 2 screw rotates through the top of the filter box and the bottom of the heating cylinder, the pinion is fixedly connected to the top of the No. 2 screw, the rack is fixedly connected to the bottom of the square nut, the No. 2 nut is threadedly connected to the circumferential surface of the No. 2 screw, and the U-shaped The rod is fixedly connected to the circumferential surface of nut No. 2, the baffle plate No. 1 is fixedly connected to the inner wall of the filter box, the baffle plate No. 2 is fixedly connected to the bottom of the inner wall of the filter box, the baffle plate No. 3 is fixedly connected to the side of the inner wall of the filter box, the brush plate is fixedly connected to the bottom of the U-shaped rod, the filter plate is installed on the side of the No. 3 baffle plate, and a moving door pinion is slidingly installed on the left side of the filter box to drive the No. 2 nut to move up and down, and the No. 2 nut moves up and down to drive the U-shaped rod to move up and down, and the U-shaped rod drives the scraper to move, and the scraper moves up and down to scrape dust on the filter plate, thereby increasing the service life of the filter plate.

[0012] According to the above scheme, the dust removal device also includes a special-shaped rod, two No. 2 air intake pipes, a valve and an extension rod. The special-shaped rod is fixedly connected to the side of the movable door, and the two No. 2 air intake pipes are conveniently fixedly connected to the front and rear sides of the filter box. The valve is arranged on the circumferential surface of the No. 2 air intake pipe, and the extension rod is fixedly installed at the control end of the valve. The movement of the movable door drives the special-shaped rod to move, and the movement of the special-shaped rod drives the extension rod to move. The movement of the extension rod opens the valve on one side and closes the valve on the other side.

[0013] The U-shaped rod penetrates the No. 1 barrier plate, and the brush plate can be driven to move by the U-shaped rod through the No. 1 barrier plate. The U-shaped rod penetrates the brush plate, and the brush plate can be driven by the U-shaped rod to move up and down to scrape the filter plate. The bottom surface of the filter plate is slidingly connected to the bottom surface of the inner wall of the filter box. The sliding connection is for the convenience of replacing the filter plate. The front side of the filter box is provided with an opening. The opening is provided for the convenience of replacing the filter plate. The special-shaped rod is in contact with the extension rod, so that the special-shaped rod can accurately drive the extension rod to rotate when it moves. A spring is provided between the special-shaped rod and the extension rod, and the spring is provided so that the extension rod can return to its position after rotating.

[0014] According to the above scheme, a pushing device is provided inside the heating tube, and the pushing device includes a flared pushing cover, the flared pushing cover is fixedly mounted on the surface of the coaxial push ring, and a horn cover is fixedly mounted on the surface of the driven rotating ring. The inner and outer walls of the exhaust pipe are slidably penetrated by a heat-conducting column, and the horn cover moves to squeeze the heat-conducting column, so that the heat-conducting column slides into the interior of the exhaust pipe. When the horn cover passes, the heat-conducting column is ejected again by the No. 2 spring arranged between the heat-conducting columns, thereby increasing the area of ​​the heat-conducting column inside the exhaust pipe, allowing the exhaust pipe to fully absorb heat, and increasing the efficiency of the exhaust pipe in introducing heat into the air to be used.

[0015] According to the above scheme, the pushing device also includes a support plate, which is fixedly installed on the inner wall of the exhaust pipe. The internal rotation of the support plate is connected to the No. 3 rotating shaft, and the circumferential surface of the No. 3 rotating shaft is fixedly connected to a scraper, and the circumferential surface of the No. 3 rotating shaft is fixedly connected to a block. When the heat-conducting column moves, it will contact the block. When the heat-conducting column continues to move, it will push the block to move, so that the block drives the scraper to rotate with the No. 3 rotating shaft as the axis. When the scraper rotates, the inner wall of the exhaust pipe is scraped and cleaned, reducing the influence of dust attached to the inner wall of the exhaust pipe on its own thermal conductivity.

[0016] According to the above scheme, a torsion spring is arranged between the support plate and the No. 3 rotating shaft, and the torsion spring enables the No. 3 rotating shaft to flip back to its original position when the heat-conducting column rises. A No. 2 spring is arranged between the heat-conducting column and the exhaust pipe, and the No. 2 spring is arranged so that the heat-conducting column can rebound and rise in time.

[0017] (3) Beneficial effects

[0018] The present invention provides an energy-saving boiler tail gas waste heat recovery device. It has the following beneficial effects:

[0019] (1) This invention, by putting the heating cylinder on the outer wall of the exhaust pipe, makes the air entering the boiler contact with the outer wall of the exhaust pipe. The high temperature exhaust pipe heats the air entering the boiler, making the air entering the boiler have a higher temperature, thereby reducing the heat loss inside the boiler. At the same time, when the suction fan is working, it drives the reciprocating screw to rotate, and the reciprocating screw drives the coaxial push ring and the driven rotating ring to push. The coaxial push ring scrapes off the dust adhering to the outer wall of the exhaust pipe to prevent the adhering dust from affecting the heat conduction effect of the air and the exhaust pipe. When the driven rotating ring moves, it drives the fan blades to rotate. The rotation of the fan blades makes the air contact with the exhaust pipe more dispersedly, so that the air inside the heating cylinder is heated more evenly.

[0020] (2) In this invention, the No. 2 screw rotates to drive the U-shaped rod to move up and down, and the U-shaped rod moves up and down to drive the brush plate installed at the bottom to scrape the dust on the filter plate. Scraping the dust on the filter plate can prevent the dust adhering to the filter plate from clogging the filter plate. Scraping the dust on the surface of the filter plate improves the filtering effect of the filter plate, and also increases the service life of the filter plate, thereby reducing the cost of use for the enterprise.

[0021] (3) In this invention, when the filter plate needs to be replaced, the movable door is manually pushed to slide toward the side where the filter plate does not need to be replaced. The valve in the sliding direction remains in the open state, and the movable door slides to close the valve on the side where the filter plate needs to be replaced. At this time, the filter plate on the side where the valve is closed can be replaced while the device is working, without affecting the air intake of the Y-shaped air intake pipe. In this way, the enterprise does not need to stop the machine frequently to replace the filter plate, thereby improving the production efficiency of the enterprise.

[0022] (4) When the fan blades rotate and move back and forth, the invention causes the horn cover to rotate and move back and forth. When the horn cover moves forward, the heat-conducting column slides into the inner wall of the exhaust pipe, thereby enhancing the heat-conducting efficiency of the heat-conducting column. When the heat-conducting column rebounds to the outer surface of the exhaust pipe through the spring, it fully contacts the outer surface air, thereby increasing the heating efficiency of the cold air and improving the working effect of the waste heat recovery.

[0023] (5) In this invention, when the heat-conducting column pushes the block to drive the scraper to rotate with the third rotating shaft as the axis, the scraper scrapes the inner wall of the exhaust pipe, reducing the adhesion of dust and impurities on the inner wall of the exhaust pipe and improving the heat conduction efficiency of the exhaust pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0025] Figure 2 This is a schematic diagram of the heating tube and exhaust pipe structure of the present invention;

[0026] Figure 3 This is a schematic diagram of the structure of the suction fan and the exhaust pipe of the present invention;

[0027] Figure 4 This is a schematic diagram of the cross-sectional structure of the heating tube of the present invention;

[0028] Figure 5 This is a schematic diagram of the structure of the reciprocating screw rod and the filter box of the present invention;

[0029] Figure 6 This is a schematic diagram of the second screw rod and the movable door structure of the present invention;

[0030] Figure 7 This is a schematic diagram of the structure of the reciprocating screw and the third rotating shaft of the present invention.

[0031] Figure: 1, base; 2, boiler body; 3, No. 1 air inlet pipe; 4, heating tube; 5, protective seat; 6, suction fan; 7, air guide tube; 801, No. 1 rotating shaft; 802, No. 1 helical gear; 803, No. 2 helical gear; 804, reciprocating screw; 805, square nut; 806, fixing rod; 807, coaxial push ring; 808, flared push cover; 9, No. 1 slider; 10, synchronous belt; 11, driven ring; 12, fan blade; 13, exhaust pipe; 14, Y-shaped air inlet pipe; 15, filter box; 1601, No. 2 Screw rod No. 1602; pinion gear No. 1603; rack gear No. 1604; nut No. 2; U-shaped rod No. 1606; baffle No. 1; 1607; baffle No. 2; 1608; baffle No. 3; 1609; brush plate No. 1610; filter plate No. 1701; sliding door No. 1702; special-shaped rod No. 1703; intake pipe No. 2; 1704; valve No. 1705; extension rod No. 18; speaker cover No. 19; heat conduction column No. 20; support plate No. 21; rotating shaft No. 3; 22; scraper No. 23; block No. 1705; extension rod No. 18; speaker cover No. 19; heat conduction column No. 20; support plate No. 21; rotating shaft No. 3; 22; scraper No. 23; block No. 22; special-shaped rod No. 1703; intake pipe No. 2; 1704; valve No. 23 ... 1705; extension rod No. 18; DETAILED DESCRIPTION

[0032] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0033] See also Figure 1-7An energy-saving boiler exhaust waste heat recovery device includes a base 1, a boiler body 2 is fixedly connected to the base 1, a heating cylinder 4 is fixedly connected to the front of the boiler body 2, an exhaust pipe 13 passes through the front of the boiler body 2, the exhaust pipe 13 is arranged inside the heating cylinder 4, a No. 1 air intake pipe 3 is fixedly connected to the top of the circumference of the heating cylinder 4, and the other end of the No. 1 air intake pipe 3 is connected to the boiler body 2, a protective seat 5 is fixedly connected to the front of the base 1, a suction fan 6 is fixedly connected to the upper end of the protective seat 5, an air guide tube 7 is fixedly connected to the upper end of the suction fan 6, the top of the air guide tube 7 is connected to the heating cylinder 4, and a removal device is provided inside the air guide tube 7;

[0034] The removal device includes a No. 1 rotating shaft 801, a No. 1 bevel gear 802, a No. 2 bevel gear 803, a reciprocating screw 804, a square nut 805, a fixed rod 806 and a coaxial push ring 807. The bottom of the No. 1 rotating shaft 801 is fixedly connected to the top of the output end of the suction fan 6, the No. 1 bevel gear 802 is fixedly connected to the top of the No. 1 rotating shaft 801, the reciprocating screw 804 is rotatably connected to the front of the base 1, the No. 2 bevel gear 803 is fixedly connected to the circumferential surface of the reciprocating screw 804, the No. 2 bevel gear 803 is meshed with the No. 1 bevel gear 802, and the square nut 805 is threadedly connected to the circumferential surface of the reciprocating screw 804. The fixing rod 806 is fixedly connected to the top of the square nut 805, and the coaxial push ring 807 is fixedly connected to the top of the fixing rod 806. The coaxial push ring 807 is slidably connected to the exhaust pipe 13. The air entering the boiler has a higher temperature, thereby reducing the heat loss inside the boiler. The coaxial push ring 807 will scrape off the dust adhering to the outer wall of the exhaust pipe 13 to prevent the adhering dust from affecting the heat conduction effect between the air and the exhaust pipe 13. When the driven rotating ring 11 moves, it will drive the fan blades 12 to rotate. The rotation of the fan blades 12 will make the air contact with the exhaust pipe 13 more dispersed, so that the air inside the heating tube 4 is heated more evenly.

[0035] A sliding groove is provided on the circumferential surface of the reciprocating screw 804, and a slider No. 1 is slidably installed inside the sliding groove. The slider No. 1 is rotatably connected to the square nut 805. A driven rotating ring 11 is rotatably installed on the left side of the coaxial push ring 807. The circumferential surface of the driven rotating ring 11 is fixedly connected with the fan blade 12. The driven rotating ring 11 is connected to the slider No. 1 through the synchronous belt 10. The rotation of the fan blade 12 will make the air contact with the exhaust pipe 13 more dispersed, so that the air inside the heating tube 4 is heated more evenly.

[0036] A filter box 15 is fixedly installed at the bottom of the heating cylinder 4, and the filter box 15 is connected to the air inlet position of the suction fan 6 through the Y-shaped air inlet pipe 14. A dust removal device is provided inside the filter box 15, and the dust removal device includes a No. 2 screw rod 1601, a pinion 1602, a rack 1603, a No. 2 nut 1604, a U-shaped rod 1605, a No. 1 baffle plate 1606, a No. 2 baffle plate 1607, a No. 3 baffle plate 1608, a brush plate 1609 and a filter plate 1610. The No. 2 screw rod 1601 rotates through the top of the filter box 15 and the bottom of the heating cylinder 4, the pinion 1602 is fixedly connected to the top of the No. 2 screw rod 1601, the rack 1603 is fixedly connected to the bottom of the square nut 805, and the No. 2 nut 1604 is threadedly connected On the circumferential surface of the No. 2 screw rod 1601, the U-shaped rod 1605 is fixedly connected to the circumferential surface of the No. 2 nut 1604, the No. 1 baffle plate 1606 is fixedly connected to the inner wall of the filter box 15, the No. 2 baffle plate 1607 is fixedly connected to the bottom of the inner wall of the filter box 15, the No. 3 baffle plate 1608 is fixedly connected to the side of the inner wall of the filter box 15, the brush plate 1609 is fixedly connected to the bottom of the U-shaped rod 1605, the filter plate 1610 is installed on the side of the No. 3 baffle plate 1608, and the left side of the filter box 15 is slidably installed with a movable door 1701, which scrapes off the dust on the surface of the filter plate 1610 to improve the filtering effect of the filter plate 1610, while also increasing the service life of the filter plate 1610 and reducing the company's use cost.

[0037] The dust removal device also includes a special-shaped rod 1702, two No. 2 air inlet pipes 1703, a valve 1704 and an extension rod 1705. The special-shaped rod 1702 is fixedly connected to the side of the movable door 1701, and the two No. 2 air inlet pipes 1703 are conveniently fixedly connected to the front and rear sides of the filter box 15. The valve 1704 is arranged on the circumferential surface of the No. 2 air inlet pipe 1703, and the extension rod 1705 is fixedly installed at the control end of the valve 1704. At this time, the filter plate 1610 on the side where the valve 1704 is closed can be replaced when the device is working without affecting the air intake of the Y-shaped air inlet pipe 14. In this way, the company does not need to stop the machine frequently to replace the filter plate 1610, thereby improving the company's production efficiency.

[0038] The U-shaped rod 1605 passes through the No. 1 baffle plate 1606, and the brush plate 1609 can be driven to move by the U-shaped rod 1605 when passing through the No. 1 baffle plate 1606. The U-shaped rod 1605 passes through the brush plate 1609, and the brush plate 1609 can be driven by the U-shaped rod 1605 to move up and down to scrape the filter plate 1610. The bottom surface of the filter plate 1610 is slidingly connected to the bottom surface of the inner wall of the filter box 15. The sliding connection is for the convenience of replacing the filter plate 1610. The front side of the filter box 15 is provided with an opening. The opening is provided to facilitate the replacement of the filter plate 1610. The special-shaped rod 1702 is in contact with the extension rod 1705, so that the special-shaped rod 1702 can accurately drive the extension rod 1705 to rotate when moving. A spring is provided between the special-shaped rod 1702 and the extension rod 1705, and the spring is provided to return to its position after the extension rod 1705 rotates.

[0039] A pushing device is provided inside the heating tube 4, and the pushing device includes a flared pushing cover 808, which is fixedly mounted on the surface of the coaxial pushing ring 807, and a horn cover 18 is fixedly mounted on the surface of the driven rotating ring 11. A heat-conducting column 19 slides through the inner and outer walls of the exhaust pipe 13. When the heat-conducting column 19 rebounds to the outer surface of the exhaust pipe 13 through a spring, it fully contacts the air on the outer surface, thereby increasing the heating efficiency of the cold air and increasing the working effect of waste heat recovery.

[0040] The pushing device also includes a support plate 20, which is fixedly installed on the inner wall of the exhaust pipe 13. The support plate 20 is internally rotatably connected to a third rotating shaft 21, and the circumferential surface of the third rotating shaft 21 is fixedly connected to a scraper 22, and the circumferential surface of the third rotating shaft 21 is fixedly connected to a block 23. The scraper 22 scrapes the inner wall of the exhaust pipe 13 to reduce the adhesion of dust and impurities on the inner wall of the exhaust pipe 13, thereby improving the thermal conductivity efficiency of the exhaust pipe 13.

[0041] A torsion spring is arranged between the support plate 20 and the third rotating shaft 21, and the torsion spring enables the third rotating shaft 21 to flip back to its original position when the heat-conducting column 19 rises. A second spring is arranged between the heat-conducting column 19 and the exhaust pipe 13, and the second spring is arranged so that the heat-conducting column 19 can rebound and rise in time.

[0042] During operation, when the waste heat is discharged from the inside of the exhaust pipe 13 and the suction fan 6 is started to work, the suction fan 6 drives the No. 1 rotating shaft 801 to rotate, the No. 1 rotating shaft 801 drives the No. 1 bevel gear 802 to rotate, the No. 1 bevel gear 802 drives the No. 2 bevel gear 803 engaged therewith to rotate, the No. 2 bevel gear 803 drives the reciprocating screw 804 to rotate, the reciprocating screw 804 rotates and drives the square nut 805 to move forward, the reciprocating screw 804 rotates and drives the slide to rotate, the slide rotation will drive the No. 1 slider 9 to rotate, the No. 1 slider 9 rotates and drives the synchronous belt 10 to move, the synchronous belt 10 moves and drives the driven rotating ring 11 to rotate, the square nut 805 moves and drives the coaxial push ring 807 to move, the coaxial push ring 807 drives the driven rotating ring 11 to move, the driven rotating ring 11 rotates and drives the fan blades 12 to rotate, the fan blades 12 rotate to mix the cold and hot air inside the heating tube 4, thereby improving the effect of heating the cold air.

[0043] When the filter plate needs to be cleaned and replaced, the square nut 805 moves and drives the rack 1603 to move. During the movement of the rack 1603, it engages with the pinion 1602, driving the pinion 1602 to rotate. The rotation of the pinion 1602 drives the No. 2 nut 1604 to move up and down. The No. 2 nut 1604 moves up and down, driving the U-shaped rod 1605 to move up and down. The U-shaped rod 1605 drives the brush plate 1609 to move. The brush plate 1609 moves up and down to scrape the dust on the filter plate 1610, thereby increasing the service life of the filter plate 1610. When the filter plate 1610 needs to be replaced, the movable door 1701 is moved. The movement of the movable door 1701 drives the special-shaped rod 1702 to move. The movement of the special-shaped rod 1702 drives the extension rod 1705 to move. The movement of the extension rod 1705 opens the valve 1704 on one side and closes the valve 1704 on the other side, so that the device does not need to stop working when replacing the filter plate 1610, thereby increasing the working efficiency of the device and reducing the workload of the workers.

[0044] When the driven rotating ring 11 moves, it drives the horn cover 18 to move, and the horn cover 18 moves to squeeze the heat-conducting column 19, causing the heat-conducting column 19 to slide into the inside of the exhaust pipe 13. When the horn cover 18 passes, the heat-conducting column 19 is ejected again by the No. 2 spring set between the heat-conducting columns 19, increasing the internal area of ​​the heat-conducting column 19 in the exhaust pipe 13, so that the exhaust pipe 13 can fully absorb heat, thereby increasing the efficiency of the exhaust pipe 13 in introducing heat into the air to be used. When the heat-conducting column 19 moves into the inside of the exhaust pipe 13, the heat-conducting column 19 moves and contacts the block 23. The heat-conducting column 19 continues to move and pushes the block 23 to move, so that the block 23 drives the scraper 22 to rotate with the No. 3 rotating shaft 21 as the axis. When the scraper 22 rotates, it scrapes and cleans the inner wall of the exhaust pipe 13, reducing the influence of dust attached to the inner wall of the exhaust pipe 13 on its own thermal conductivity, and also reducing the erosion of the inner wall of the exhaust pipe 13 by corrosive substances, thereby increasing the service life of the device and reducing the use cost of the device.

[0045] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. An energy-saving boiler tail gas waste heat recovery device, comprising a base (1), characterized in that: The base (1) is fixedly connected to a boiler body (2), the front of the boiler body (2) is fixedly connected to a heating cylinder (4), the front of the boiler body (2) is penetrated by an exhaust pipe (13), the exhaust pipe (13) is arranged inside the heating cylinder (4), the top of the circumference of the heating cylinder (4) is fixedly connected to a No. 1 air intake pipe (3), the other end of the No. 1 air intake pipe (3) is connected to the boiler body (2), the front of the base (1) is fixedly connected to a protective seat (5), the upper end of the protective seat (5) is fixedly connected to a suction fan (6), the upper end of the suction fan (6) is fixedly connected to an air guide tube (7), the top of the air guide tube (7) is connected to the heating cylinder (4), and a removal device is arranged inside the air guide tube (7); The removal device comprises a first rotating shaft (801), a first helical gear (802), a second helical gear (803), a reciprocating screw (804), a square nut (805), a fixing rod (806) and a coaxial push ring (807), wherein the bottom of the first rotating shaft (801) is fixedly connected to the top of the output end of the suction fan (6), the first helical gear (802) is fixedly connected to the top of the first rotating shaft (801), and the reciprocating screw (804) is rotatably connected to the front of the base (1). The second helical gear (803) is fixedly connected to the circumferential surface of the reciprocating screw (804), the second helical gear (803) is meshed with the first helical gear (802), the square nut (805) is threadedly connected to the circumferential surface of the reciprocating screw (804), the fixed rod (806) is fixedly connected to the top of the square nut (805), the coaxial push ring (807) is fixedly connected to the top of the fixed rod (806), and the coaxial push ring (807) is slidably connected to the exhaust pipe (13).

2. The energy-saving boiler tail gas waste heat recovery device according to claim 1, characterized in that: The circumferential surface of the reciprocating screw (804) is provided with a slide groove, and a slider (9) is slidably installed inside the slide groove. The slider (9) is rotatably connected to the square nut (805). A driven rotating ring (11) is rotatably installed on the left side of the coaxial push ring (807). The circumferential surface of the driven rotating ring (11) is fixedly connected with a fan blade (12). The driven rotating ring (11) is transmission-connected to the slider (9) through a synchronous belt (10).

3. The energy-saving boiler tail gas waste heat recovery device according to claim 2, characterized in that: A filter box (15) is fixedly installed at the bottom of the heating cylinder (4), and the filter box (15) is connected to the air inlet position of the suction fan (6) through a Y-shaped air inlet pipe (14). A dust removal device is provided inside the filter box (15), and the dust removal device includes a No. 2 screw rod (1601), a pinion (1602), a rack (1603), a No. 2 nut (1604), a U-shaped rod (1605), a No. 1 baffle plate (1606), a No. 2 baffle plate (1607), a No. 3 baffle plate (1608), a brush plate (1609) and a filter plate (1610). The No. 2 screw rod (1601) rotates and passes through the top of the filter box (15) and the bottom of the heating cylinder (4). The pinion (1602) is fixedly connected to the top of the No. 2 screw rod (1601). The rack (1603) is a U-shaped rod (1605), a No. 1 baffle plate (1606), a No. 2 baffle plate (1607), a No. 3 baffle plate (1608), a brush plate (1609) and a filter plate (1610). The strip (1603) is fixedly connected to the bottom of the square nut (805), the second nut (1604) is threadedly connected to the circumferential surface of the second screw rod (1601), the U-shaped rod (1605) is fixedly connected to the circumferential surface of the second nut (1604), the first baffle plate (1606) is fixedly connected to the inner wall of the filter box (15), the second baffle plate (1607) is fixedly connected to the bottom of the inner wall of the filter box (15), the third baffle plate (1608) is fixedly connected to the side of the inner wall of the filter box (15), the brush plate (1609) is fixedly connected to the bottom of the U-shaped rod (1605), the filter plate (1610) is installed on the side of the third baffle plate (1608), and a movable door (1701) is slidably installed on the left side of the filter box (15).

4. The energy-saving boiler tail gas waste heat recovery device according to claim 3, characterized in that: The dust removal device also includes a special-shaped rod (1702), two No. 2 air inlet pipes (1703), a valve (1704) and an extension rod (1705), wherein the special-shaped rod (1702) is fixedly connected to the side of the movable door (1701), the two No. 2 air inlet pipes (1703) are conveniently fixedly connected to the front and rear sides of the filter box (15), the valve (1704) is arranged on the circumferential surface of the No. 2 air inlet pipe (1703), and the extension rod (1705) is fixedly installed on the control end of the valve (1704).

5. The energy-saving boiler tail gas waste heat recovery device according to claim 4, characterized in that: The U-shaped rod (1605) passes through the first baffle plate (1606), the U-shaped rod (1605) passes through the brush plate (1609), the bottom surface of the filter plate (1610) is slidably connected to the bottom surface of the inner wall of the filter box (15), the front of the filter box (15) is provided with an opening, the special-shaped rod (1702) is in contact with the extension rod (1705), and a spring is provided between the special-shaped rod (1702) and the extension rod (1705).

6. The energy-saving boiler tail gas waste heat recovery device according to claim 5, characterized in that: A pushing device is provided inside the heating tube (4), and the pushing device includes a flared pushing cover (808), the flared pushing cover (808) is fixedly mounted on the surface of the coaxial pushing ring (807), a horn cover (18) is fixedly mounted on the surface of the driven rotating ring (11), and a heat-conducting column (19) is slidably penetrated through the inner and outer walls of the exhaust pipe (13).

7. The energy-saving boiler tail gas waste heat recovery device according to claim 6, characterized in that: The pushing device further comprises a support plate (20), the support plate (20) being fixedly mounted on the inner wall of the exhaust pipe (13), the interior of the support plate (20) being rotatably connected to a third rotating shaft (21), the circumferential surface of the third rotating shaft (21) being fixedly connected to a scraper (22), and the circumferential surface of the third rotating shaft (21) being fixedly connected to a blocking block (23).

8. The energy-saving boiler tail gas waste heat recovery device according to claim 7, characterized in that: A torsion spring is provided between the support plate (20) and the third rotating shaft (21), and a second spring is provided between the heat conducting column (19) and the exhaust pipe (13).

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