Waste heat recovery heat exchanger capable of reducing heat loss of boiler flue gas

Abstract

The invention discloses a heat exchanger, and particularly relates to a waste heat recovery heat exchanger capable of reducing boiler flue gas heat loss, which comprises a heat exchange box, a plurality of heat dissipation pipes penetrating through the heat exchange box are arranged in the heat exchange box, a first box body and a second box body are arranged on two sides of the heat exchange box, and the heat dissipation pipes are communicated with the first box body and the second box body. By arranging the heat dissipation pipe penetrating through the heat exchange box in the heat exchange box and arranging the steel wire rope cleaning device in the heat dissipation pipe, the inner wall of the heat exchange pipe can be effectively cleaned, heat resistance caused by accumulated dust or impurities is reduced, and therefore the heat exchange efficiency is remarkably improved, and heat loss of boiler flue gas is reduced. The reciprocating motion of the steel wire rope can be realized by utilizing the first winding roll and the second winding roll which are arranged in the first box body and the second box body as well as the positive and negative rotation operation of the motor and the torsion spring, so that the cleaning block is driven to automatically clean in the heat exchange tube. According to the structure, the complexity of manual cleaning is avoided, and the automation degree of equipment is improved.

Description

Technical Field

[0001] The invention relates to the technical field of heat exchange equipment, and in particular to a waste heat recovery heat exchanger for reducing heat loss of boiler flue gas. Background Art

[0002] With the development of industry, boilers are widely used in the fields of electricity, chemical industry, metallurgy, etc. as an important thermal energy equipment. During the operation of the boiler, flue gas is a high-temperature exhaust gas generated by the combustion of fuel, which usually has a high amount of waste heat. If it is not recovered, this part of the waste heat will be discharged with the flue gas, causing a large amount of energy loss. Therefore, how to effectively recover the waste heat in the flue gas and reduce the heat loss of the boiler has become the key to improving the overall energy efficiency of the boiler and reducing energy consumption. In the prior art, heat exchangers are often used to recover the waste heat of flue gas, and the heat in the flue gas is transferred to water or air, thereby reducing the exhaust temperature and improving energy utilization. However, since the flue gas often contains dust and impurities, these impurities will adhere to and accumulate on the inner wall of the heat exchange tube, causing scaling and clogging of the inner wall of the heat exchange tube, seriously affecting the heat exchange efficiency. Traditional waste heat recovery systems mostly rely on manual or shutdown cleaning methods, which not only increases maintenance costs, but also has low cleaning efficiency and is difficult to meet actual production needs. Summary of the invention

[0003] In order to solve the above problems in the prior art, the present invention provides a waste heat recovery heat exchanger for reducing the heat loss of boiler flue gas, so as to solve the current technical problems.

[0004] The technical solution adopted by the present invention to solve its technical problem is: The present invention provides a waste heat recovery heat exchanger for reducing heat loss of boiler flue gas, comprising: a heat exchange box, wherein a plurality of heat dissipation pipes penetrating the heat exchange box are arranged inside the heat exchange box, a first box body and a second box body are arranged on both sides of the heat exchange box, and the heat dissipation pipes connect the first box body and the second box body.

[0005] Preferably, a plurality of first rotating shafts are arranged in the first box body, a plurality of first wire reels are arranged on the first rotating shafts, the first wire reels are fixed on the first rotating shafts, and steel wire ropes are wound around the first wire reels.

[0006] Preferably, a first gear is provided on the first rotating shaft, and adjacent first gears are meshed with each other, and one of the first gears is meshed with a third gear, and the third gear is connected to the third rotating shaft, and a torsion spring is sleeved on the third rotating shaft for preventing the third gear from rotating.

[0007] Preferably, a plurality of second rotating shafts are provided in the second box body, a plurality of second wire reels are provided on the second rotating shafts, the second wire reels are fixed on the second rotating shafts, and the other end of the steel wire rope is wound around the second wire reels.

[0008] Preferably, the second rotating shaft is provided with a second gear, and adjacent second gears are meshed with each other, wherein one of the second gears is meshed with a fourth gear, and the fourth gear is connected to the main shaft of the motor.

[0009] Preferably, the steel wire rope passes through the heat exchange tube, and a cleaning block is fixed on the steel wire rope. When the motor rotates forward, it will drive the second winding drum to move and then drive the steel wire rope to move. The cleaning block will pass through the heat exchange tube to clean the inner wall of the heat exchange tube. When the motor reverses, the torsion spring will drive the third gear to reset, and then drive the first winding drum to reverse, drive the cleaning block to move in the opposite direction, and continue to clean the inner wall of the heat exchange tube.

[0010] Preferably, the first box is connected to a smoke inlet, the second box is connected to a smoke outlet, and the heat exchange box is connected to a clean air inlet and a clean air outlet.

[0011] The beneficial effects of the present invention are: Improve heat exchange efficiency: By setting a heat pipe running through the heat exchange box and arranging a wire rope cleaning device in the heat exchange pipe, the inner wall of the heat exchange pipe can be effectively cleaned, reducing the thermal resistance caused by dust accumulation or impurities, thereby significantly improving the heat exchange efficiency and reducing the heat loss of boiler flue gas.

[0012] Realize automatic cleaning: By using the first and second winding reels set in the first and second boxes and the forward and reverse operation of the motor and the torsion spring, the reciprocating motion of the wire rope can be realized, thereby driving the cleaning block to automatically clean the heat exchange tube. This structure avoids the tediousness of manual cleaning and improves the automation level of the equipment.

[0013] Reduce energy consumption and maintenance costs: The automatic cleaning device repeatedly cleans the inner wall of the heat exchange tube to maintain cleanliness, reducing the increase in thermal resistance caused by flue gas ash accumulation, which not only improves the heat exchange efficiency but also reduces the energy consumption of the boiler. At the same time, the frequency of equipment maintenance is reduced, thereby reducing maintenance costs and labor costs.

[0014] Simple structure and high reliability: The waste heat recovery heat exchanger has a compact design structure, the winding reel, rotating shaft and gear transmission device are simple and efficient, and a torsion spring is provided for resetting, making the device highly reliable and durable.

[0015] Improve emission quality: By recovering waste heat from flue gas, the loss of heat energy and the emission of harmful substances are reduced, the overall emission quality of the boiler is improved, and it helps to reduce environmental pollution. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The above aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which: Figure 1 is a schematic structural diagram of a waste heat recovery heat exchanger for reducing heat loss of boiler flue gas according to an embodiment of the present invention; Figure 2 is a schematic structural diagram of a waste heat recovery heat exchanger for reducing heat loss of boiler flue gas according to an embodiment of the present invention; Figure 3 is a schematic structural diagram of a waste heat recovery heat exchanger for reducing heat loss of boiler flue gas according to an embodiment of the present invention; Figure 4 is a schematic structural diagram of a waste heat recovery heat exchanger for reducing heat loss of boiler flue gas according to an embodiment of the present invention; Figure 5 It is a schematic structural diagram of a waste heat recovery heat exchanger for reducing heat loss of boiler flue gas according to an embodiment of the present invention. Description of Reference Numerals

[0017] exist Figure 1-Figure 5 In the figure, the first box body 1; the first rotating shaft 2; the wire rope 3; the cleaning block 4; the heat exchange tube 5; the baffle 6; the heat exchange box 7; the clean air outlet 8; the smoke outlet 9; the second rotating shaft 10; the second box body 11; the clean air inlet 12; the smoke inlet 13; the first winding drum 14; the first gear 15; the third gear 16; the fourth gear 17; and the second gear 18. DETAILED DESCRIPTION

[0018] 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.

[0019] The present invention provides a waste heat recovery heat exchanger for reducing heat loss of boiler flue gas, comprising: a heat exchange box 7, a plurality of heat dissipation pipes penetrating the heat exchange box 7 are arranged inside the heat exchange box 7, a first box body 1 and a second box body 11 are arranged on both sides of the heat exchange box 7, and the heat dissipation pipes connect the first box body 1 and the second box body 11. The heat exchange box 7, the first box body 1 and the second box body 11 are all metal boxes, and the heat dissipation pipes are copper pipes.

[0020] A plurality of first rotating shafts 2 are arranged in the first housing 1, and a plurality of first winding reels 14 are arranged on the first rotating shafts 2. The first winding reels 14 are fixed on the first rotating shafts 2, and a steel wire rope 3 is wound on the first winding reels 14. A first gear 15 is arranged on the first rotating shaft 2, and adjacent first gears 15 are meshed with each other, one of the first gears 15 is meshed with a third gear 16, and the third gear 16 is connected to the third rotating shaft, and a torsion spring for preventing the third gear 16 from rotating is sleeved on the third rotating shaft. The first rotating shaft 2, the second rotating shaft 10 and the third rotating shaft are all metal rotating shafts, the first winding reel 14 and the second winding reel are all metal winding reels, and the first gear 15, the second gear 18, the third gear 16 and the fourth gear 17 are all metal gears.

[0021] A plurality of second rotating shafts 10 are arranged in the second box body 11 , a plurality of second wire reels are arranged on the second rotating shafts 10 , the second wire reels are fixed on the second rotating shafts 10 , and the other end of the steel wire rope 3 is wound around the second wire reels.

[0022] The second rotating shaft 10 is provided with a second gear 18 , and adjacent second gears 18 are meshed with each other, wherein one of the second gears 18 is meshed with a fourth gear 17 , and the fourth gear 17 is connected to the main shaft of the motor.

[0023] The steel wire rope 3 passes through the heat exchange tube 5, and a cleaning block 4 is fixed on the steel wire rope 3. The cleaning block 4 is a rubber block. When the motor rotates forward, it will drive the second winding drum to move and then drive the steel wire rope 3 to move. The cleaning block 4 will pass through the heat exchange tube 5 to clean the inner wall of the heat exchange tube 5. When the motor reverses, the torsion spring will drive the third gear 16 to reset, and then drive the first winding drum 14 to reverse, drive the cleaning block 4 to move in the opposite direction, and continue to clean the inner wall of the heat exchange tube 5.

[0024] The first box body 1 is connected to a smoke inlet 13, the second box body 11 is connected to a smoke outlet 9, the heat exchange box 7 is connected to a clean air inlet 12 and a clean air outlet 8, and a baffle 6 is arranged in the heat exchange box 7, and the baffle 6 is a metal plate.

[0025] By setting a heat dissipation pipe running through the heat exchange box 7 and arranging a wire rope 3 cleaning device in the heat dissipation pipe, the inner wall of the heat exchange pipe 5 can be effectively cleaned, reducing the thermal resistance caused by dust accumulation or impurities, thereby significantly improving the heat exchange efficiency and reducing the heat loss of boiler flue gas.

[0026] By utilizing the first winding drum 14 and the second winding drum disposed in the first box body 1 and the second box body 11 and the forward and reverse rotation operation of the motor and the torsion spring, the reciprocating motion of the wire rope 3 can be realized, thereby driving the cleaning block 4 to automatically clean the heat exchange tube 5. This structure avoids the tediousness of manual cleaning and improves the automation level of the equipment.

[0027] Through repeated cleaning by the automatic cleaning device, the cleanliness of the inner wall of the heat exchange tube 5 is maintained, and the increase in thermal resistance caused by flue gas ash accumulation is reduced, which not only improves the heat exchange efficiency, but also reduces the energy consumption of the boiler. At the same time, the frequency of equipment maintenance is reduced, thereby reducing maintenance costs and labor costs.

[0028] The waste heat recovery heat exchanger has a compact design structure, a simple and efficient winding drum, a rotating shaft and a gear transmission device, and a torsion spring is provided for resetting, so that the device has high reliability and durability.

[0029] By recovering the waste heat from flue gas, the loss of heat energy and the emission of harmful substances are reduced, the overall emission quality of the boiler is improved, and it helps to reduce environmental pollution.

[0030] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A waste heat recovery heat exchanger for reducing heat loss of boiler flue gas, comprising: The heat exchange box is characterized in that: a plurality of heat dissipation pipes penetrating the heat exchange box are arranged inside the heat exchange box, a first box body and a second box body are arranged on both sides of the heat exchange box, and the heat dissipation pipes connect the first box body and the second box body.

2. The waste heat recovery heat exchanger for reducing heat loss of boiler flue gas according to claim 1 is characterized in that: A plurality of first rotating shafts are arranged in the first box body, a plurality of first wire reels are arranged on the first rotating shafts, the first wire reels are fixed on the first rotating shafts, and steel wire ropes are wound on the first wire reels.

3. The waste heat recovery heat exchanger for reducing heat loss of boiler flue gas according to claim 2 is characterized in that: The first rotating shaft is provided with a first gear, and adjacent first gears are meshed with each other, and one of the first gears is meshed with a third gear, and the third gear is connected to the third rotating shaft, and the third rotating shaft is sleeved with a torsion spring for preventing the third gear from rotating.

4. The waste heat recovery heat exchanger for reducing heat loss of boiler flue gas according to claim 2 is characterized in that: A plurality of second rotating shafts are arranged in the second box body, a plurality of second wire reels are arranged on the second rotating shafts, the second wire reels are fixed on the second rotating shafts, and the other end of the steel wire rope is wound on the second wire reels.

5. The waste heat recovery heat exchanger for reducing heat loss of boiler flue gas according to claim 4 is characterized in that: The second rotating shaft is provided with a second gear, and adjacent second gears are meshed with each other, wherein one of the second gears is meshed with a fourth gear, and the fourth gear is connected to the main shaft of the motor.

6. The waste heat recovery heat exchanger for reducing heat loss of boiler flue gas according to claim 2 is characterized in that: A cleaning block is fixed on the steel wire rope.

7. The waste heat recovery heat exchanger for reducing heat loss of boiler flue gas according to claim 1 is characterized in that: The first box is connected to a smoke inlet, the second box is connected to a smoke outlet, and the heat exchange box is connected to a clean air inlet and a clean air outlet.

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