Dust-containing flue gas combustion-supporting device

Abstract

The invention discloses a dust-containing flue gas combustion-supporting device which comprises an outer shell and a heat exchange unit. A flow collecting cover is arranged at the rear end in the outer shell, the rear end of the flow collecting cover extends out of the rear side face of the outer shell, an air supply pipe is arranged at the end of the flow collecting cover, an air supplementing pipe is arranged at the lower end of the air supply pipe, and evenly-distributed air holes are formed in the outer surface of the air supplementing pipe. The heat exchange unit is slidably connected to the middle of the outer shell, an air blower is arranged at the upper end of the front side face of the heat exchange unit, a flow dividing box is arranged at the air outlet end of the air blower, and the rear end of the flow dividing box communicates with the interior of the heat exchange unit and is movably connected with the flow collecting cover in an inserted mode. According to the dust-containing flue gas combustion-supporting device, flue gas can be used for providing good preheating for supplemented air, it is guaranteed that high oxygen content exists in the hearth, then the combustion efficiency of fuel can be greatly improved, meanwhile, the heat exchange unit can be pulled out in a sliding mode to be cleaned, and use and maintenance convenience is good.

Description

Technical Field

[0001] The invention relates to the technical field of environmental protection equipment, in particular to a dust-containing flue gas combustion-supporting device. Background Art

[0002] Boilers play an important role in industry. They can provide continuous high-temperature steam and can be used in many different application scenarios. Many industrial production processes require high-temperature steam to complete, such as textiles, papermaking, chemicals, etc. Boilers can provide stable high-temperature steam to ensure the smooth progress of industrial production. Boilers provide heat energy by burning fuels, improve the combustion efficiency of boilers, help reduce energy consumption and reduce pollutant emissions, thereby achieving the goal of energy conservation and emission reduction. Boiler auxiliary combustion devices will then be used to improve the combustion efficiency of boilers. The combustion process of boilers requires sufficient oxygen. The use of blowers for air distribution is the main boiler auxiliary combustion device. At present, air is generally supplied directly through blowers. The low air temperature is easy to cause the furnace temperature to drop after entering, affecting the normal combustion of fuel. There are also simple heat exchange tubes for heat exchange. The heat exchange tubes generally directly penetrate the flue horizontally. The air travel in the heat exchange tubes is short, and the heat exchange efficiency is average. At the same time, the heat exchange tubes are not easy to remove and clean, and the smoke attached to the surface will also affect the heat exchange efficiency, resulting in the general use of boiler auxiliary combustion devices. Summary of the invention

[0003] The technical problem to be solved by the present invention is to overcome the existing defects and provide a dusty flue gas combustion-supporting device that can use the flue gas to provide good preheating for the supplementary air, ensure a high oxygen content inside the furnace, and thus greatly improve the combustion efficiency of the fuel. At the same time, the heat exchange unit can be slid out for cleaning, and is easy to use and maintain.

[0004] To achieve the above-mentioned object, the present invention provides the following technical solutions: a dust-containing flue gas combustion-supporting device, comprising an outer shell and a heat exchange unit; A collector is provided at the rear end of the outer shell, the rear end of the collector extends out of the rear side of the outer shell and an air supply pipe is provided at the end, an air supply pipe is provided at the lower end of the air supply pipe, and air holes evenly distributed are opened on the outer surface of the air supply pipe; The heat exchange unit is slidably connected to the middle part of the outer shell, a blower is provided at the upper end of the front side of the heat exchange unit, a diverter box is provided at the air outlet of the blower, the rear end of the diverter box is connected to the interior of the heat exchange unit, the rear end of the heat exchange unit is movably connected to the collecting cover, and the input end of the blower is electrically connected to the output end of the external controller. The blower can be used to replenish air to the furnace to increase the oxygen content inside. At the same time, the flue gas can be used to preheat the air with a good preheating effect, ensuring that the air has a higher temperature when entering the furnace, avoiding the temperature drop of the furnace caused by the air, and greatly improving the combustion efficiency of the fuel. At the same time, the heat exchange unit can be slid out for cleaning, and the use and maintenance are convenient.

[0005] Furthermore, the heat exchange unit includes a supporting shell, a front sealing plate, heat exchange tubes and rectangular tubes. The supporting shell is slidably connected to the interior of the outer shell. The interior of the supporting shell is provided with evenly distributed heat exchange tubes. The upper ends of the heat exchange tubes are connected to the interior of the diverter box. The front end of the supporting shell is provided with a front sealing plate. The front sealing plate is located on the front side of the outer shell. The upper end of the front side of the front sealing plate is fixedly connected to the blower. The diverter box passes through the front sealing plate. The rectangular tube is arranged at the lower end of the rear side of the supporting shell. The pipe openings at the lower ends of the heat exchange tubes are all located inside the rectangular tube. The rectangular tube is movably connected to the collecting cover, and the air can be preheated by the flue gas.

[0006] Furthermore, the transverse tube bodies of the heat exchange tubes are arranged in a wave shape in the vertical direction, so as to promote the zigzag flow of the flue gas.

[0007] Furthermore, the heat exchange unit also includes annular sheets, which are evenly arranged on the outer arc surface of the heat exchange tube to increase the surface area of ​​the heat exchange tube.

[0008] Furthermore, the annular plates are all tilted, the annular plates on the right side of the same heat exchange tube are tilted backward from top to bottom, and the annular plates on the left side of the same heat exchange tube are tilted forward from top to bottom, so as to promote the flue gas to flow in a zigzag linear manner.

[0009] Furthermore, a small silicone pad is provided inside the current collecting cover, and the rear end of the rectangular tube contacts the front side of the small silicone pad, thereby improving the sealing performance between the current collecting cover and the rectangular frame tube.

[0010] Furthermore, a large silicone pad is provided on the front side of the outer shell, and the front side of the large silicone pad contacts the rear side of the front sealing plate, thereby improving the sealing performance between the front sealing plate and the outer shell.

[0011] Furthermore, the upper and lower ends of the front sealing plate are slidably connected with U-shaped insertion strips, the upper and lower sides of the front end of the outer shell are provided with symmetrically distributed connecting seats, the insertion holes at the front end of the connecting seats are movably connected with the vertically adjacent U-shaped insertion strips, the middle part of the front sealing plate is rotatably connected with a bidirectional screw rod through a bearing, the U-shaped insertion strips are threadedly connected to the bidirectional screw rod, the lower end of the bidirectional screw rod is provided with a handwheel, the inside of the connecting seat is rotatably connected with a rotating shaft, and the rotating shaft is cooperated with the laterally corresponding U-shaped insertion strip to facilitate the fixation of the front sealing plate.

[0012] Furthermore, positioning plates are provided at the rear ends of the left and right sides of the support shell, and symmetrically distributed handles are provided on the front side of the front sealing plate to facilitate the control of the movement of the heat exchange unit.

[0013] Furthermore, a chimney flange plate is provided at the upper end of the outer shell, and a boiler flange plate is provided at the lower end of the outer shell, so as to facilitate the connection of boiler components.

[0014] Compared with the prior art, the present invention has the following beneficial effects: 1. When in use, adjust the external controller to start the blower. The blower blows air into the heat exchange tube through the diverter box. The air passes through the heat exchange tube and the rectangular tube into the collector, and then passes through the air supply pipe into the air supply pipe. Then, the air passes through the air holes on the outer arc surface of the air supply pipe into the furnace, which can increase the oxygen content in the furnace and thus improve the combustion efficiency of the fuel. The burning flue gas passes through the outer shell and the support shell and flows upward. The upward-flowing flue gas heats the air inside the heat exchange tube through the heat exchange tube and the annular sheet. The heat exchange tube The tube body meanders several times inside the supporting shell, and the transverse tube body of the heat exchange tube is arranged in a wave shape in the vertical direction, and the annular sheet is inclined, which has a good disturbance effect on the flue gas flowing through, and the flue gas and the internal air have a good heat exchange effect. When in use, the furnace can be supplemented with air through a blower to increase the internal oxygen content. At the same time, the flue gas can be used to preheat the air, and it has a good preheating effect, ensuring that the air has a higher temperature when entering the furnace, which can avoid the temperature drop of the furnace caused by the air, and can greatly improve the combustion efficiency of the fuel.

[0015] 2. Hold the handle with both hands to drive the front sealing plate to move forward. The front sealing plate drives the support shell to slide forward along the slide groove of the outer shell. The support shell drives the heat exchange tube and the annular sheet to move to the outside of the outer shell. The positioning plate moves forward synchronously with the support shell and abuts against the front side wall of the outer shell to limit the complete removal of the support shell. Then the heat exchange tube and the annular sheet can be cleaned. After cleaning, the support shell can be inserted backward. The heat exchange unit is installed to the inside of the outer shell by sliding connection. It can be pulled out for cleaning during use. Foreign matter on the surface of the heat exchange tube can be handled in a timely and convenient manner, providing a guarantee for efficient heat exchange.

[0016] 3. When cleaning, rotate the bidirectional screw rod through the hand wheel, and the bidirectional screw rod drives the U-shaped insert to gather toward the center and gradually separate from the connecting seat. The U-shaped insert and the shaft inside the connecting seat slide relative to each other, and the shaft rotates inside the connecting seat, thereby reducing the friction between the U-shaped insert and the connecting seat. After the U-shaped insert is separated from the connecting seat, it will not restrict the movement of the front sealing plate. By rotating the hand wheel, the U-shaped insert can be driven to shrink and separate from multiple connecting seats, thereby loosening the front sealing plate, facilitating the movement of the heat exchange unit, and greatly improving the convenience during maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the structure of the present invention; Figure 2 It is a schematic cross-sectional structural diagram of the outer shell of the present invention; Figure 3 It is a schematic diagram of the structure of the heat exchange tube of the present invention; Figure 4 It is a cross-sectional structural schematic diagram of the rear side of the present invention; Figure 5 It is a schematic diagram of the enlarged structure of point A of the present invention.

[0018] In the figure: 1-outer shell, 2-boiler flange plate, 3-chimney flange plate, 4-air supply pipe, 5-air supply pipe, 6-collecting cover, 7-heat exchange unit, 71-support shell, 72-front sealing plate, 73-heat exchange tube, 74-rectangular frame tube, 75-annular sheet, 8-small silicone pad, 9-connecting seat, 10-U-shaped insert, 11-bidirectional screw rod, 12-handwheel, 13-rotating shaft, 14-blower, 15-diversion box, 16-large silicone pad, 17-positioning plate, 18-handle. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. 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 creative work are within the scope of protection of the present invention.

[0020] See also Figure 1-5 This embodiment provides a dust-containing flue gas combustion-supporting device, including an outer shell 1 and a heat exchange unit 7.

[0021] A collecting hood 6 is provided at the rear end of the outer shell 1. The rear end of the collecting hood 6 extends out of the rear side of the outer shell 1 and is provided with an air supply pipe 4 at the end. An air supply pipe 5 is provided at the lower end of the air supply pipe 4. Evenly distributed air holes are opened on the outer surface of the air supply pipe 5. The air supply pipe 5 is installed inside the boiler furnace. Air enters the air supply pipe 5 through the air supply pipe 4, and then the air enters the furnace through the air holes on the outer arc surface of the air supply pipe 5, which can increase the oxygen content inside the furnace and thus improve the combustion efficiency of the fuel. A chimney flange plate 3 is provided at the upper end of the outer shell 1 to connect the flue with the chimney flange plate 3. A boiler flange plate 2 is provided at the lower end of the outer shell 1 to connect the boiler flange plate 2 to the smoke outlet of the boiler.

[0022] The heat exchange unit 7 is slidably connected to the middle part of the outer shell 1, and a blower 14 is provided at the upper end of the front side of the heat exchange unit 7. A shunt box 15 is provided at the air outlet of the blower 14. The rear end of the shunt box 15 is communicated with the interior of the heat exchange unit 7. The rear end of the heat exchange unit 7 is movably plugged with the collecting cover 6. The input end of the blower 14 is electrically connected to the output end of the external controller. The heat exchange unit 7 includes a support shell 71, a front sealing plate 72, a heat exchange tube 73 and a rectangular tube 74. The support shell 71 is slidably connected to the interior of the outer shell 1. The interior of the support shell 71 is provided with evenly distributed heat exchange tubes 73. The upper ends of the heat exchange tubes 73 are all communicated with the interior of the shunt box 15. A front sealing plate 72 is provided at the front end of the support shell 71. The front sealing plate 72 is located on the front side of the outer shell 1. The front sealing plate 72 drives the support shell 71 along The slide groove of the outer shell 1 slides forward, the upper end of the front side of the front sealing plate 72 is fixedly connected to the blower 14, the diverter box 15 passes through the front sealing plate 72, the blower 14 works, and the blower 14 blows air to the inside of the heat exchange tube 73 through the diverter box 15. The rectangular tube 74 is arranged at the lower end of the rear side of the support shell 71. The pipe openings at the lower ends of the heat exchange tubes 73 are all located inside the rectangular tube 74. The rectangular tube 74 is movably connected to the collecting cover 6. The air passes through the heat exchange tubes 73 and the rectangular tubes 74 and enters the inside of the collecting cover 6. The transverse tube bodies of the heat exchange tubes 73 are arranged in a wavy shape in the vertical direction. The heat exchange unit 7 also includes annular sheets 75, which are evenly arranged on the outer arc surfaces of the heat exchange tubes 73. The burning smoke passes through the outer shell 1 and the support shell 71 and flows upward. The flue gas heats the air inside the heat exchange tube 73 through the heat exchange tube 73 and the annular sheet 75. The tube body of the heat exchange tube 73 makes multiple circuits inside the support shell 71. The annular sheets 75 are all tilted. The annular sheets 75 on the right side of the same heat exchange tube 73 are all tilted backward from top to bottom, and the annular sheets 75 on the left side of the same heat exchange tube 73 are all tilted forward from top to bottom, which has a good disturbing effect on the flue gas flowing through, and the flue gas and the internal air have a good heat exchange effect, ensuring that the air has a higher temperature when entering the furnace. A small silicone pad 8 is provided inside the collecting cover 6, and the rear end of the rectangular tube 74 contacts the front side of the small silicone pad 8. The small silicone pad 8 improves the sealing of the connection between the rectangular tube 74 and the collecting cover 6. A large silicone pad 16 is provided on the front side of the outer shell 1. The front side of the rubber pad 16 contacts the rear side of the front sealing plate 72. The large silicone pad 16 improves the sealing performance of the front sealing plate 72 and the outer shell 1. The upper and lower ends of the front sealing plate 72 are slidably connected with U-shaped inserts 10. The upper and lower sides of the front end of the outer shell 1 are provided with symmetrically distributed connecting seats 9. The plug holes at the front end of the connecting seats 9 are movably connected with the vertically adjacent U-shaped inserts 10. After the U-shaped inserts 10 are separated from the connecting seats 9, the movement of the front sealing plate 72 will not be restricted. The middle part of the front sealing plate 72 is rotatably connected with a bidirectional screw rod 11 through a bearing. The U-shaped inserts 10 are all threadedly connected to the bidirectional screw rod 11. The lower end of the bidirectional screw rod 11 is provided with a hand wheel 12. The bidirectional screw rod 11 is rotated by the hand wheel 12, and the bidirectional screw rod 11 drives the U-shaped inserts 10 to gather toward the center and gradually separate from the connecting seat 9.The inside of the connection seat 9 is rotatably connected with a rotating shaft 13, and the rotating shaft 13 is arranged in cooperation with the U-shaped insert 10 corresponding to the horizontal direction. The U-shaped insert 10 and the rotating shaft 13 inside the connection seat 9 slide relative to each other, and the rotating shaft 13 rotates inside the connection seat 9, thereby reducing the friction between the U-shaped insert 10 and the connection seat 9. The rear ends of the left and right sides of the support shell 71 are provided with positioning plates 17. The positioning plates 17 move forward synchronously with the support shell 71 and abut against the front side wall of the outer shell 1 to limit the complete removal of the support shell 71. The front side of the front sealing plate 72 is provided with symmetrically distributed handles 18. Holding the handles 18 with both hands drives the front sealing plate 72 to move forward.

[0023] The working principle of a dust-containing flue gas combustion-supporting device provided by the present invention is as follows: When in use, connect the boiler flange plate 2 to the smoke outlet of the boiler, install the air supply pipe 5 inside the boiler furnace, connect the flue to the chimney flange plate 3, and when in use, adjust the external controller to start the blower 14, and the blower 14 blows air to the inside of the heat exchange tube 73 through the diverter box 15. The air passes through the heat exchange tube 73 and the rectangular tube 74 and enters the inside of the collecting cover 6, and then enters the inside of the air supply pipe 5 through the air supply pipe 4, and then the air passes through the air holes on the outer arc surface of the air supply pipe 5 and enters the inside of the furnace, which can increase the oxygen content inside the furnace, thereby improving the combustion efficiency of the fuel, and the combustion of the fuel is improved. The flue gas flows upward through the outer shell 1 and the support shell 71. The flue gas flowing upward heats the air inside the heat exchange tube 73 through the heat exchange tube 73 and the annular sheet 75. The tube body of the heat exchange tube 73 meanders for many times inside the support shell 71, and the transverse tube body of the heat exchange tube 73 is arranged in a wave shape in the vertical direction. The annular sheet 75 is inclined, which has a good disturbance effect on the flue gas flowing through. The flue gas has a good heat exchange effect with the internal air, ensuring that the air has a higher temperature when entering the furnace, which can avoid the temperature drop of the furnace caused by the air, and ensure that the fuel has a good combustion effect. After a period of use, the surface of the heat exchange tube 73 can be cleaned. During cleaning, the bidirectional screw rod 11 is rotated by the hand wheel 12, and the bidirectional screw rod 11 drives the U-shaped insert 10 to retract toward the center and gradually separate from the connecting seat 9. The U-shaped insert 10 slides relative to the rotating shaft 13 inside the connecting seat 9, and the rotating shaft 13 rotates inside the connecting seat 9, thereby reducing the friction between the U-shaped insert 10 and the connecting seat 9. After the U-shaped insert 10 is separated from the connecting seat 9, the movement of the front sealing plate 72 will not be restricted. Then, the handle 18 is held with both hands to drive the front sealing plate 72 to move forward, and the front sealing plate 72 The support shell 71 is driven to slide forward along the slide groove of the outer shell 1, and the support shell 71 drives the heat exchange tube 73 and the annular sheet 75 to move to the outside of the outer shell 1. The positioning plate 17 moves forward synchronously with the support shell 71 and abuts against the front side wall of the outer shell 1, limiting the complete removal of the support shell 71. Then the heat exchange tube 73 and the annular sheet 75 can be cleaned. After cleaning, the support shell 71 can be inserted backward. The rectangular tube 74 on the rear side of the support shell 71 is movably plugged into the collecting cover 6 and contacts with the small silicone pad 8 at the same time. Then the hand wheel 12 is rotated in the opposite direction to reset the U-shaped insert 10 to lock the front sealing plate 72.

[0024] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A dusty flue gas combustion-supporting device, characterized in that: It comprises an outer shell (1) and a heat exchange unit (7); A flow collecting cover (6) is provided at the rear end of the outer shell (1), the rear end of the flow collecting cover (6) extends out of the rear side of the outer shell (1) and is provided with an air supply pipe (4) at the end, an air supply pipe (5) is provided at the lower end of the air supply pipe (4), and air holes evenly distributed are provided on the outer surface of the air supply pipe (5); The heat exchange unit (7) is slidably connected to the middle part of the outer shell (1); a blower (14) is provided at the upper end of the front side of the heat exchange unit (7); a flow divider box (15) is provided at the air outlet end of the blower (14); a rear end of the flow divider box (15) is connected to the interior of the heat exchange unit (7); the rear end of the heat exchange unit (7) is movably connected to the collecting cover (6); and an input end of the blower (14) is electrically connected to an output end of an external controller.

2. A dust-containing flue gas combustion-supporting device according to claim 1, characterized in that: The heat exchange unit (7) comprises a support shell (71), a front sealing plate (72), a heat exchange tube (73) and a rectangular tube (74); the support shell (71) is slidably connected to the interior of the outer shell (1); the interior of the support shell (71) is provided with evenly distributed heat exchange tubes (73); the upper ends of the heat exchange tubes (73) are all in communication with the interior of the flow diversion box (15); a front sealing plate (72) is provided at the front end of the support shell (71); the front sealing plate (72) is located at the front side of the outer shell (1); the upper end of the front side surface of the front sealing plate (72) is fixedly connected to the blower (14); the flow diversion box (15) passes through the front sealing plate (72); the rectangular tube (74) is arranged at the lower end of the rear side surface of the support shell (71); the pipe openings of the lower ends of the heat exchange tubes (73) are all located inside the rectangular tube (74); and the rectangular tube (74) is movably plugged into the collecting cover (6).

3. A dust-containing flue gas combustion-supporting device according to claim 2, characterized in that: The transverse tube bodies of the heat exchange tubes (73) are arranged in a wave shape in the vertical direction.

4. A dust-containing flue gas combustion-supporting device according to claim 2, characterized in that: The heat exchange unit (7) further comprises annular sheets (75), wherein the annular sheets (75) are evenly arranged on the outer arc surface of the heat exchange tube (73).

5. The dust-containing flue gas combustion-supporting device according to claim 4, characterized in that: The annular plates (75) are all arranged tilted, and the annular plates (75) on the right side of the same heat exchange tube (73) are all arranged tilted backward from top to bottom, and the annular plates (75) on the left side of the same heat exchange tube (73) are all arranged tilted forward from top to bottom.

6. The dust-containing flue gas combustion-supporting device according to claim 2, characterized in that: A small silica gel pad (8) is provided inside the collecting cover (6), and the rear end of the rectangular tube (74) is in contact with the front side of the small silica gel pad (8).

7. The dust-containing flue gas combustion-supporting device according to claim 2, characterized in that: A large silicone pad (16) is provided on the front side of the outer shell (1), and the front side of the large silicone pad (16) contacts the rear side of the front sealing plate (72).

8. The dust-containing flue gas combustion-supporting device according to claim 2, characterized in that: The upper and lower ends of the front sealing plate (72) are slidably connected to U-shaped inserts (10); the upper and lower sides of the front end of the outer shell (1) are provided with symmetrically distributed connecting seats (9); the insert holes at the front ends of the connecting seats (9) are movably connected to the vertically adjacent U-shaped inserts (10); the middle part of the front sealing plate (72) is rotatably connected to a bidirectional screw rod (11) through a bearing; the U-shaped inserts (10) are threadedly connected to the bidirectional screw rod (11); the lower end of the bidirectional screw rod (11) is provided with a hand wheel (12); the interior of the connecting seat (9) is rotatably connected to a rotating shaft (13); the rotating shaft (13) is matched with the U-shaped inserts (10) corresponding to the horizontal direction.

9. The dust-containing flue gas combustion-supporting device according to claim 2, characterized in that: Positioning plates (17) are provided at the rear ends of the left and right sides of the support shell (71), and symmetrically distributed handles (18) are provided on the front side of the front sealing plate (72).

10. The dust-containing flue gas combustion-supporting device according to claim 1, characterized in that: The upper end of the outer shell (1) is provided with a chimney flange plate (3), and the lower end of the outer shell (1) is provided with a boiler flange plate (2).

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