Primary air inlet temperature heater

Abstract

The present invention relates to the technical field of boiler air preheating, and discloses a primary air inlet air temperature heater, comprising an expansion tank, the outer surface of which is connected with a waste steam pipe and a hot water pipe in sequence from top to bottom, the bottom ends of the waste steam pipe and the hot water pipe are both provided with a stop valve 1, and a radiator is fixed to the bottom of the two stop valves 1. During use of the present invention, the air flow is blown from left to right by the operation of the fan, and the air flow drives the wind wheel to rotate, and the driving gear and the bevel gear 2 are rotated by the transmission of the transmission roller 2, the transmission belt, and the transmission roller 1. Under the transmission of the transmission gear and the main gear, the two pipe sleeves and the heat dissipation blades are rotated, and the heat dissipation and heat exchange efficiency are improved by the rotating spiral heat dissipation blades; at the same time, the rotating heat dissipation blades will drive the horizontal frame to move upward along the guide rod through the roller, and the surface of the heat dissipation blades will be wiped and cleaned to prevent dust from sticking and reducing the heat dissipation effect.

Description

Technical Field

[0001] The invention relates to the technical field of boiler air preheating, in particular to a primary air inlet air temperature heater. Background Art

[0002] The inlet air temperature of the boiler is not heated when it leaves the factory, and changes with the outdoor temperature. When the outdoor temperature is low, the inlet air temperature is low, which can easily cause the flue gas flowing through the cold air end pipe box of the air preheater to be blocked and corroded by condensation due to the weather, thereby reducing the operating cycle of the boiler and the service life of the air preheater.

[0003] In summary, there is currently a lack of a primary air inlet air temperature heater that can effectively prevent dust accumulation and low-temperature corrosion problems in boiler air preheaters, avoid condensation and blockage of flue gas flowing through the cold air end pipe box of the primary air preheater due to weather influences, and increase the operating cycle of the primary air preheater, stabilize its heat exchange capacity, and greatly increase the boiler operating time and the service life of the air preheater. Summary of the Invention

[0004] In view of the deficiencies in the prior art, the present invention provides a primary air inlet air temperature heater, which solves the problems raised in the above background technology.

[0005] To solve the above technical problems, according to one aspect of the present invention, more specifically, a primary air inlet air temperature heater includes an expansion tank, the outer surface of which is connected to a residual steam pipe and a hot water pipe from top to bottom in sequence, a stop valve 1 is provided at the bottom of each of the residual steam pipe and the hot water pipe, a radiator is fixed to the bottom of the two stop valves 1, a stop valve 2 and a stop valve 3 are fixed to the top and bottom of the expansion tank respectively, a fan is connected to the left side of the radiator, and a through-type air outlet is provided on the right side of the radiator.

[0006] Furthermore, a heat dissipation pipe is fixed to a bottom end of the stop valve, the outer surface of the heat dissipation pipe is located inside the radiator and is sleeved with a pipe sleeve, and heat dissipation blades are fixed to the outer surface of the pipe sleeve, a bottom groove is opened on the inner lower surface of the radiator, a main gear is fixed below the outer surface of the pipe sleeve and located inside the bottom groove, the main gear is rotatably connected to the inner lower surface of the bottom groove, guide rods are fixed at the front and rear of the bottom groove, and the outer surfaces of the two guide rods are slidably connected to a lifting plate together, and a cross frame is fixed on the left and right sides of the lifting plate, and two brush cylinders are rotatably connected to the interior of the cross frame, and the brush cylinder is rotatably connected to a roller at one end away from the lifting plate;

[0007] The lower surface of the bottom groove is located between the two main gears and is rotatably connected to two transmission gears. The two transmission gears are meshed and connected. The opposite ends of the two transmission gears are respectively meshed and connected with the two main gears. A rotating rod is fixed to the middle of the transmission gear on the right side. The bottom end of the rotating rod passes through the lower surface of the radiator and is fixed with a bevel gear 1. A bracket is fixed to the lower surface of the radiator. A transmission roller 1 is rotatably connected inside the bracket. A bevel gear 2 is fixed to the rear end of the transmission roller 1. The bevel gear 2 is meshed and connected with the bevel gear 1. An inner groove is provided on the lower surface of the radiator. A second transmission roller is rotatably connected inside the inner groove, and the rear end of the second transmission roller passes through the interior of the radiator and is fixed with a wind wheel, and the front end of the second transmission roller passes through the front surface of the radiator and is fixed with a driving gear, and the outer surface of the second transmission roller and the outer surface of the first transmission roller are jointly provided with a transmission belt, and a slide is provided on the front surface of the radiator, and the top end of the slide extends to the upper surface of the radiator, and a motor is fixed on the lower surface of the slide, and a screw is fixed on the top end of the motor output shaft, and the outer surface of the screw is located above the radiator and is threadedly connected to a screw block, and the front end of the screw block is integrally formed with a lifting frame.

[0008] Furthermore, the lifting frame is a U-shaped structure, the driving gear is located inside the lifting frame, a plurality of tooth grooves are opened on the left side inside the lifting frame, and the lifting frame is meshed and connected with the driving gear through the tooth grooves.

[0009] Furthermore, the screw block is adapted to the slideway, and the rear surface of the lifting frame is in contact with the front surface of the radiator.

[0010] Furthermore, the cross frame is a U-shaped structure, the heat dissipation blade is a spiral structure, the outer surface of the roller is provided with bristles, the four brush cylinders are divided into two groups, and the two brush cylinders in each group are respectively located above and below the heat dissipation blades, and are in contact with the surface of the heat dissipation blades, and the roller is in contact with the outer surface of the heat dissipation blade through the bristles.

[0011] Furthermore, the bottom ends of the two heat dissipation pipes penetrate the lower surface of the radiator and are both fixed with a stop valve four.

[0012] Furthermore, the heat dissipation blades and the tube sleeve are both made of metal copper.

[0013] The beneficial effects of the primary air inlet air temperature heater of the present invention are:

[0014] The present invention utilizes the hot water and residual steam in the boiler fixed-discharge expansion tank and heats the primary air inlet temperature through the inside of the radiator. The upper part of the expansion tank is steam, which is generally discharged to the air, and the lower part is hot water, which is generally discharged to the ditch. A stop valve is installed at the air discharge position on the top of the boiler fixed-discharge expansion tank to close it. The residual steam passes through the residual steam pipe to the radiator to heat the air, and the hot water passes through the hot water pipe to the radiator to heat the air. The opening degree of the residual steam and hot water is adjusted by the two stop valves to control the air flow temperature, effectively preventing the dust accumulation and low-temperature corrosion problems of the boiler air preheater, and avoiding the condensation blockage of the flue gas flowing through the cold air end pipe box of the primary air-to-air preheater due to the influence of weather. The operation cycle of the primary air-to-air preheater can be significantly improved, its heat exchange capacity can be stabilized, and the boiler operation time and the service life of the air preheater can be greatly improved.

[0015] During heat exchange, the fan operates to blow air from left to right, and the air flow drives the wind wheel to rotate. Through the transmission of transmission roller 2, transmission belt, and transmission roller 1, the driving gear and bevel gear 2 rotate. Under the transmission of the transmission gear and the main gear, the two pipe sleeves and the heat dissipation blades are able to rotate, and the heat dissipation and heat exchange efficiency are improved by the rotating spiral heat dissipation blades; at the same time, the rotating heat dissipation blades will drive the horizontal frame to move up along the guide rod through the roller, wipe and clean the surface of the heat dissipation blades, and avoid dust sticking and reducing the heat dissipation effect; when the horizontal frame rises to the top, the motor drives the screw to rotate and the lifting frame descends and engages with the driving gear. The continuously descending lifting frame will drive the driving gear to reverse, thereby reversing the two heat dissipation blades and driving the horizontal frame to descend and reset. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The present invention will be further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0017] Figure 1 It is a structural schematic diagram of the present invention;

[0018] Figure 2 Schematic diagram of the structure of the radiator in the present invention;

[0019] Figure 3 Schematic diagram of the structure of the radiator in the present invention when viewed from above;

[0020] Figure 4 is a schematic cross-sectional structural diagram of the radiator in the present invention;

[0021] Figure 5 It is a schematic diagram of the side cross-section structure of the radiator in the present invention;

[0022] Figure 6 Schematic diagram of the internal structure of the radiator in the present invention.

[0023] In the figure: 1. expansion tank; 2. residual steam pipe; 3. hot water pipe; 4. stop valve 1; 5. radiator; 6. stop valve 2; 7. stop valve 3; 8. fan; 9. air outlet; 10. heat pipe; 11. pipe sleeve; 12. heat dissipation blade; 13. stop valve 4; 14. guide rod; 15. lifting plate; 16. cross frame; 17. brush cylinder; 18. roller; 19. main gear; 20. transmission gear; 21. rotating rod; 22. bevel gear 1; 23. bracket; 24. transmission roller 1; 25. bevel gear 2; 26. inner groove; 27. transmission roller 2; 28. wind wheel; 29. drive gear; 30. transmission belt; 31. slideway; 32. motor; 33. screw; 34. screw block; 35. lifting frame; 36. bottom groove. DETAILED DESCRIPTION

[0024] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments. It should be noted that, unless there is a conflict, the embodiments and features in the embodiments of the present application can be combined with each other.

[0025] like Figure 1-6 As shown, according to one aspect of the present invention, a primary air inlet air temperature heater is provided, including an expansion tank 1. The outer surface of the expansion tank 1 is connected to a residual steam pipe 2 and a hot water pipe 3 in sequence from top to bottom. A stop valve 1 4 is provided at the bottom of each of the residual steam pipe 2 and the hot water pipe 3. A radiator 5 is fixed to the bottom of the two stop valves 1 4. A stop valve 2 6 and a stop valve 3 7 are fixed to the top and bottom of the expansion tank 1 respectively. A fan 8 is connected to the left side of the radiator 5, and a through-type air outlet 9 is provided on the right side of the radiator 5.

[0026] In this embodiment, a heat dissipation pipe 10 is fixed to the bottom end of the stop valve 4. The outer surface of the heat dissipation pipe 10 is located inside the radiator 5 and is sleeved with a pipe sleeve 11. The outer surface of the pipe sleeve 11 is fixed with a heat dissipation blade 12. A bottom groove 36 is provided on the lower surface of the inner part of the radiator 5. A main gear 19 is fixed below the outer surface of the pipe sleeve 11 and located inside the bottom groove 36. The main gear 19 is rotatably connected to the lower surface of the bottom groove 36. Guide rods 14 are fixed to the front and rear sides of the bottom groove 36. The outer surfaces of the two guide rods 14 are slidably connected to the lifting plate 15. A cross frame 16 is fixed to the left and right sides of the lifting plate 15. Two brush cylinders 17 are rotatably connected to the cross frame 16. The end of the brush cylinder 17 away from the lifting plate 15 is rotatably connected to the roller 18.

[0027] The lower surface of the bottom groove 36 is located between the two main gears 19 and is rotatably connected to two transmission gears 20. The two transmission gears 20 are meshed and connected. The opposite ends of the two transmission gears 20 are respectively meshed and connected with the two main gears 19. A rotating rod 21 is fixed to the middle of the transmission gear 20 on the right side. The bottom end of the rotating rod 21 passes through the lower surface of the radiator 5 and is fixed with a bevel gear 1 22. A bracket 23 is fixed to the lower surface of the radiator 5. A transmission roller 1 24 is rotatably connected inside the bracket 23. A bevel gear 25 is fixed to the rear end of the transmission roller 1 24. The bevel gear 25 is meshed and connected with the bevel gear 1 22. An inner groove 26 is provided on the lower surface of the radiator 5. The inner groove 2 6 is rotatably connected to a second transmission roller 27 inside. The rear end of the second transmission roller 27 extends into the interior of the radiator 5 and is fixed with a wind wheel 28. The front end of the second transmission roller 27 extends to the front surface of the radiator 5 and is fixed with a driving gear 29. The outer surface of the second transmission roller 27 and the outer surface of the first transmission roller 24 are jointly provided with a transmission belt 30. A slide 31 is provided on the front surface of the radiator 5. The top end of the slide 31 extends to the upper surface of the radiator 5. A motor 32 is fixed to the lower surface of the slide 31. A screw 33 is fixed to the top end of the output shaft of the motor 32. The outer surface of the screw 33 is located above the radiator 5 and is threadedly connected to a screw block 34. The front end of the screw block 34 is integrally formed with a lifting frame 35.

[0028] In this embodiment, the lifting frame 35 has a U-shaped structure, the driving gear 29 is located on the inner side of the lifting frame 35, and a plurality of tooth grooves are provided on the left side of the lifting frame 35. The lifting frame 35 is meshed with the driving gear 29 via the tooth grooves. When the lifting frame 35 descends and meshes with the driving gear 29, as the lifting frame 35 descends, the two heat dissipating blades 12 are rotated in the opposite direction under the transmission of structures such as the transmission belt 30, so that the cross frame 16 moves and resets.

[0029] In this embodiment, the screw block 34 is adapted to the slide 31, and the rear surface of the lifting frame 35 is in contact with the front surface of the radiator 5. Under the contact limit of the lifting frame 35, when the screw rod 33 rotates, the screw block 34 can move downward and enter the interior of the slide 31.

[0030] In this embodiment, the cross frame 16 is a U-shaped structure, the heat dissipation blade 12 is a spiral structure, the outer surface of the roller 18 is provided with bristles, and the four brush cylinders 17 are divided into two groups. The two brush cylinders 17 in each group are respectively located above and below the heat dissipation blade 12, and are in contact with the surface of the heat dissipation blade 12. The roller 18 is in contact with the outer surface of the heat dissipation blade 12 through the bristles. When the spiral heat dissipation blade 12 rotates with the pipe sleeve 11, the cross frame 16 and the lifting plate 15 will be lifted and lowered along the guide rod 14 by pushing the roller 18, and the rotating brush cylinder 17 wipes the surface of the heat dissipation blade 12 with the bristles on the surface to avoid dust accumulation and affect the heat dissipation effect.

[0031] In this embodiment, the bottom ends of the two heat dissipation pipes 10 are both extended to the lower surface of the radiator 5, and both are fixed with a stop valve 13. The stop valve 13 is opened and closed to control the discharge of hot water and residual steam.

[0032] In this embodiment, the heat dissipation blades 12 and the tube sleeve 11 are both made of metal copper, which can effectively dissipate heat.

[0033] The working principle of this device is to use the hot water and residual steam in the boiler expansion tank 1 to heat the primary air inlet temperature through the radiator 5. The upper part of the expansion tank 1 contains steam, which is generally discharged to the air, while the lower part contains hot water, which is generally discharged to the ditch. A stop valve 2 (6) is installed at the top of the boiler expansion tank 1 to close the air discharge. The residual steam flows through the residual steam pipe 2 to the radiator 5 to heat the air. The hot water flows through the hot water pipe 3 to the radiator 5 to heat the air. The air temperature can be controlled by adjusting the opening of the two stop valves 1 (4) to adjust the residual steam and hot water.

[0034] During heat exchange, the fan 8 operates to blow air from left to right, and the airflow drives the wind wheel 28 to rotate. Through the transmission of the transmission roller 27, the transmission belt 30, and the transmission roller 1 24, the driving gear 29 and the bevel gear 2 25 rotate (at this time, the lifting frame 35 is raised away from the driving gear 29 under the operation of the motor 32 and is no longer engaged with it). Under the transmission of the transmission gear 20 and the main gear 19, the two pipe sleeves 11 and the heat dissipation blades 12 are rotated, and the heat dissipation efficiency is improved by the rotating spiral heat dissipation blades 12; at the same time, the rotating heat dissipation blades 12 will drive the horizontal frame 16 to move upward along the guide rod 14 through the roller 18, wiping and cleaning the surface of the heat dissipation blades 12 to prevent dust from sticking and reducing the heat dissipation effect. When the horizontal frame 16 rises to the top, the motor 32 drives the screw 33 to rotate, and the lifting frame 35 descends and engages with the driving gear 29. The continuously descending lifting frame 35 will drive the driving gear 29 to reverse, thereby reversing the two heat dissipation blades 12 and driving the horizontal frame 16 to descend and reset.

[0035] Of course, the above description is not a limitation of the present invention, and the present invention is not limited to the above examples. Changes, modifications, additions or substitutions made by ordinary technicians in this technical field within the essential scope of the present invention also fall within the scope of protection of the present invention.

Claims

1. A primary air inlet air temperature heater, comprising an expansion vessel (1), characterized in that: The outer surface of the expansion tank (1) is connected to a residual steam pipe (2) and a hot water pipe (3) in sequence from top to bottom. The bottom ends of the residual steam pipe (2) and the hot water pipe (3) are both provided with a stop valve (4). A radiator (5) is fixed to the bottom of the two stop valves (4). The top and bottom ends of the expansion tank (1) are respectively fixed with a stop valve (6) and a stop valve (7). The left side of the radiator (5) is connected to a fan (8). The right side of the radiator (5) is provided with a through-type air outlet (9). A heat dissipation tube (10) is fixed to the bottom end of the stop valve (4), and the outer surface of the heat dissipation tube (10) is located inside the radiator (5) and is provided with a tube sleeve (11), and a heat dissipation blade (12) is fixed to the outer surface of the tube sleeve (11), and a bottom groove (36) is provided on the inner lower surface of the radiator (5), and a main gear (19) is fixed below the outer surface of the tube sleeve (11) and located inside the bottom groove (36), and the main gear (19) is rotatably connected to the inner lower surface of the bottom groove (36), and guide rods (14) are fixed to the front and rear sides of the bottom groove (36), and the outer surfaces of the two guide rods (14) are slidably connected to a lifting plate (15), and a cross frame (16) is fixed to the left and right sides of the lifting plate (15), and two brush cylinders (17) are rotatably connected to the inner side of the cross frame (16), and the brush cylinder (17) is rotatably connected to the roller (18) at one end away from the lifting plate (15); The lower surface of the bottom groove (36) is located between the two main gears (19) and is rotatably connected to two transmission gears (20). The two transmission gears (20) are meshed and connected. The opposite ends of the two transmission gears (20) are respectively meshed and connected with the two main gears (19). A rotating rod (21) is fixed in the middle of the transmission gear (20) on the right side. The bottom end of the rotating rod (21) passes through the lower surface of the radiator (5) and is fixed with a bevel gear 1 (22). A bracket (23) is fixed to the lower surface of the radiator (5). The bracket (23) is rotatably connected to a transmission roller 1 (24). A bevel gear 2 (25) is fixed to the rear end of the transmission roller 1 (24). The bevel gear 2 (25) is meshed and connected with the bevel gear 1 (22). An inner groove (26) is provided on the lower surface of the radiator (5). The inner groove (26) ) is rotatably connected to the second transmission roller (27) inside, the rear end of the second transmission roller (27) passes through the inside of the radiator (5) and is fixed with a wind wheel (28), the front end of the second transmission roller (27) passes through the front surface of the radiator (5) and is fixed with a driving gear (29), the outer surface of the second transmission roller (27) and the outer surface of the first transmission roller (24) are jointly provided with a transmission belt (30), the front surface of the radiator (5) is provided with a slideway (31), the top end of the slideway (31) extends to the upper surface of the radiator (5), a motor (32) is fixed to the lower surface of the slideway (31), the top end of the output shaft of the motor (32) is fixed with a screw (33), the outer surface of the screw (33) is located above the radiator (5) and is threadedly connected to a screw block (34), and the front end of the screw block (34) is integrally formed with a lifting frame (35).

2. The primary air inlet air temperature heater according to claim 1, characterized in that: The lifting frame (35) is a U-shaped structure. The driving gear (29) is located inside the lifting frame (35). A plurality of tooth grooves are provided on the left side inside the lifting frame (35). The lifting frame (35) is meshed and connected with the driving gear (29) through the tooth grooves.

3. The primary air inlet air temperature heater according to claim 1, characterized in that: The screw block (34) is adapted to the slideway (31), and the rear surface of the lifting frame (35) is in contact with the front surface of the radiator (5).

4. The primary air inlet air temperature heater according to claim 1, characterized in that: The cross frame (16) is a U-shaped structure, the heat dissipation blade (12) is a spiral structure, the outer surface of the roller (18) is provided with bristles, the four brush cylinders (17) are divided into two groups, and the two brush cylinders (17) in each group are respectively located above and below the blades of the heat dissipation blade (12) and are in contact with the blade surface of the heat dissipation blade (12), and the roller (18) is in contact with the outer surface of the heat dissipation blade (12) through the bristles.

5. The primary air inlet air temperature heater according to claim 1, characterized in that: The bottom ends of the two heat dissipation pipes (10) both penetrate the lower surface of the radiator (5) and are both fixed with stop valves (13).

6. The primary air inlet air temperature heater according to claim 1, characterized in that: The heat dissipation blades (12) and the pipe sleeve (11) are both made of metal copper.

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