A finned tube air cooler for dust removal systems

Abstract

The application provides a finned tube air cooler of dust removal system, which comprises an inlet and outlet section, a heat dissipation section, a dust collection section and a sensing device. The inlet and outlet section comprises an air inlet, an air inlet bin, an air inlet bin bottom plate, a partition plate, an air outlet bin bottom plate, an air outlet bin, an air outlet and a sealing plate. The heat dissipation section comprises a high-temperature finned tube group, a low-temperature finned tube group, a forced cooling fan and a guide plate, which are fixed below the inlet and outlet section and play a role of heat dissipation. The finned tube is provided with small holes and built-in winding lines. The dust collection section comprises a turning bin top plate, a dust gas turning bin, a dust hopper and a valve, which are fixed below the heat dissipation section and used for collecting and storing dust. The sensing device comprises a temperature sensor and a pressure sensor, which are arranged in the air inlet and the air outlet of the inlet and outlet section, and are used for monitoring the running state of the air cooler in real time and automatically adjusting the air volume of the forced cooling fan and the flow of high-temperature dust gas. The application is mainly used for cooling and temperature reduction of high-temperature dust gas in the production process of carbon negative electrode material, real-time monitoring, energy saving and emission reduction, and has good heat exchange effect.

Description

TECHNICAL FIELD

[0001] The present application relates to an air cooler, in particular to a dust removal system finned tube air cooler. BACKGROUND

[0002] The air cooler is also called air-cooled heat exchanger, and is simply called air cooler. The air cooler is a device for cooling process medium (hot stream) to a required temperature (final cooling temperature) by using air as cooling medium. The current common air cooler has weak self-adaptability, low automation level, and cannot achieve the purpose of full cooling by changing the flow size of the cooled medium. In the process of adjusting the fan speed by using the temperature sensor, the cooling effect of the fan cannot be optimized, which causes waste of electric energy and poor energy-saving effect. At the same time, due to the small specific heat capacity and low heat transfer coefficient of air, the air side heat transfer resistance accounts for a large part of the overall air cooler heat resistance, which further leads to low finned tube heat transfer performance and seriously affects the economy and safety of the unit. Therefore, it is required to improve the utilization efficiency of the air cooler on the basis of ensuring the cooling effect, and to improve the economy, safety and automation level of the device.

[0003] The patent with publication number "CN 203479007 U" "Air cooler for anode baking multifunctional overhead crane platform" relates to an air cooler for anode baking multifunctional overhead crane platform. The air cooler is a vertical structure, which comprises an upper box, a middle box, a lower box and a hopper at the bottom. The upper box is divided into an air inlet chamber and an air outlet chamber. The middle box is provided with a cooling pipe, and a fan guide cover and an axial flow fan are installed on the outside of the middle box. The axial flow fan and the fan guide cover are connected, and forced mechanical ventilation is performed through the axial flow fan and the fan guide cover to ensure the temperature difference between air and hot fluid and to improve the heat transfer coefficient. The working principle is that high-temperature hot fluid enters the air inlet chamber from the upper box, passes through the cooling pipe and the lower box, and then returns to the upper box to be discharged from the air outlet chamber. Air is sucked into the middle box from the fan guide cover by the axial flow fan, and exchanges heat with the cooling pipe. The deposited powder in the high-temperature hot fluid enters the hopper, and is discharged by opening the discharge valve. The system meets the cooling requirements without expanding the external dimensions, and the powder is smoothly discharged without blocking. However, the air cooler cannot automatically adjust the fan air volume and the flow of the cooled medium, has low automation level and poor energy-saving effect; and the traditional cooling pipe has small heat dissipation area and poor cooling effect. SUMMARY

[0004] The present application relates to an air cooler, in particular to a dust removal system finned tube air cooler.

[0005] To achieve the above object, the present application is implemented by using the following technical solutions.

[0006] A dust removal system finned tube air cooler comprises an inlet and outlet section, a heat dissipation section, a dust collection section and a sensing device. The heat dissipation section is fixed below the inlet and outlet section and serves to dissipate heat. The dust collection section is fixed below the heat dissipation section and serves to collect and store the dust falling down. The sensing device is arranged in the air inlet and air outlet of the inlet and outlet section to monitor the running state of the air cooler in real time.

[0007] The inlet and outlet section is composed of an air inlet, an air inlet chamber, an air inlet chamber bottom plate, a partition plate, an air outlet chamber bottom plate, an air outlet chamber and a sealing plate. The air inlet and the air outlet are fixed side by side on one side of the inlet and outlet section; the air inlet chamber and the air outlet chamber are fixed side by side on the air inlet and the air outlet respectively; the air inlet chamber bottom plate and the air outlet chamber bottom plate are fixed side by side below the air inlet chamber and the air outlet chamber respectively. The partition plate is arranged between the air inlet chamber and the air outlet chamber to separate the two chambers; the sealing plate is arranged on the air inlet chamber and the air outlet chamber to seal them.

[0008] The heat dissipation section is composed of a high-temperature finned tube group, a low-temperature finned tube group, forced cooling fans and guide plates. The high-temperature finned tube group and the low-temperature finned tube group are arranged inside the heat dissipation section; the high-temperature finned tube group and the low-temperature finned tube group are each composed of a plurality of finned tubes combined and welded according to a certain rule, and the number of layers of the tubes is reasonably selected to ensure the cooling of the dust gas in the tubes. The high-temperature finned tube group is welded at the bottom of the air inlet chamber bottom plate and the top of the turning chamber top plate of the dust collection section respectively, and the low-temperature finned tube group is welded at the bottom of the air outlet chamber bottom plate and the top of the turning chamber top plate of the dust collection section respectively. A plurality of forced cooling fans are arranged on one side of the heat dissipation section, and the number of the forced cooling fans is reasonably selected by calculation to effectively take away the heat conducted to the walls of the high-temperature finned tube group and the low-temperature finned tube group by the high-temperature dust gas, thereby reducing the temperature of the dust gas. The guide plates are arranged on both sides of the heat dissipation section to guide the flow direction of the air blown by the forced cooling fans.

[0009] The finned tube is composed of a fin and a tube base and is the core element of heat transfer of the air cooler. Since the heat transfer coefficient of air is very low, the fin is added to the outer surface of the tube base to increase the heat dissipation area. The heat transfer coefficient between the high-temperature gas in the tube and the outside is calculated to determine the total heat transfer area. The fin is in a wave shape and is wound on the outer surface of the tube base in a thread line manner to increase the heat dissipation area. Small heat dissipation holes are formed in the fin to improve the heat dissipation effect; the tube base is internally provided with a winding thread, and the cross-sectional shape of the tube base is oval, circular or oblate to reduce the air resistance and increase the heat dissipation area.

[0010] The forced cooling fan is used to take away the heat conducted to the high-temperature finned tube group and the low-temperature finned tube group by the dust gas through blowing. The forced cooling fan is installed on the side of the low-temperature finned tube group and blows air from the low-temperature finned tube group to the high-temperature finned tube group, so that the heat dissipation mode of the heat dissipation section is optimized and the high-temperature dust gas is quickly cooled.

[0011] The dust collecting section is composed of the turning bin top plate, the dust gas turning bin, the dust hopper and the valve. The dust hopper is conical, which is convenient for collecting and discharging the dust. When the dust collected in the dust hopper is more, the valve is opened to discharge the dust.

[0012] The high-temperature dust gas is sucked into the air inlet bin from the air inlet, and then flows through the air inlet bin bottom plate. The high-temperature dust gas enters the high-temperature finned tube group, and the heat is conducted to the fins and tube bases of the high-temperature finned tube group. The heat is taken away by the forced cooling fan blowing. The cooled dust gas flows out from the lower end of the high-temperature finned tube group, turns 180° at the dust gas turning bin, and is sucked into the low-temperature finned tube group. The heat is conducted to the fins and tube bases of the low-temperature finned tube group, and further taken away by the forced cooling fan blowing. The dust gas flows through the air outlet bin bottom plate upwards to reach the air outlet bin. The cooled dust gas is finally sucked into the next process bag-type dust collector from the air outlet.

[0013] The sensing device includes a temperature sensor and a pressure sensor. The temperature sensor is arranged in the air inlet and the air outlet of the air cooler. When the temperature is higher or lower than the set value, the speed of the forced cooling fan is automatically adjusted to ensure sufficient cooling conditions and realize energy saving. The pressure sensor is arranged in the air outlet of the air cooler. When the pressure is higher than the set value, an alarm is given to change the air volume of the centrifugal multi-stage induced draft fan.

[0014] By the above scheme, the finned tube is used to increase the heat dissipation area. The forced cooling fan is arranged to provide power for the air outside the air cooler tube to ensure that the ambient air has sufficient pressure to pass through the finned tube. The temperature sensor is arranged to detect the dust gas temperature and adjust the speed of the forced cooling fan to save electric energy. The pressure sensor is arranged to control the flow of the cooled medium to realize sufficient heat dissipation of the cooled medium.

[0015] The high-temperature finned tube group and the low-temperature finned tube group are each composed of a plurality of finned tubes combined and welded according to a certain rule. The number of finned tubes is 60-200, and the finned tubes are arranged in a forked row.

[0016] The height of the fin is 6.4-25 mm, and the outer diameter of the tube base is φ25-φ89 mm.

[0017] The forced cooling fan has multiple, i.e. 2-10. The power of each forced cooling fan is 3-250 kW, and the air supply of each forced cooling fan is 6000-80000 m 3 .

[0018] The temperature of the dust gas sucked into the air inlet is 700-900℃, and the temperature of the dust gas at the air outlet after cooling in the heat dissipation section is reduced to 90℃ or below.

[0019] The thickness of the dust hopper plate of the air cooler is 4-14 mm, and the conical angle of the dust hopper is 50°-60°.

[0020] The finned tube air cooler of the dust removal system has the beneficial effects compared with the prior art.

[0021] ①The cooling air flow is orderly and controllable, and the heat dissipation performance is significantly enhanced. In the process of blowing the air flow from the low-temperature finned tube group to the high-temperature finned tube group by the forced cooling fan, the air flow realizes temperature gradient cooling in the finned tube; the air flow blown by the forced cooling fan is guided by the guide plate and realizes orderly passing through the heat dissipation section without overflowing, thereby fully cooling the high-temperature finned tube group and the low-temperature finned tube group. The structure significantly enhances the heat dissipation performance and can achieve the purpose of rapidly cooling the high-temperature ash gas.

[0022] ②The finned tube structure significantly increases the heat dissipation area and further improves the heat dissipation effect. The wave-shaped fins are added to the outer surface of the traditional heat dissipation pipe, and the fins are wound on the outer surface of the pipe base in the form of a thread, which can significantly increase the heat dissipation area. The finned tube is arranged in the forked row arrangement, the heat exchange coefficient is high, and the vertical placement occupies a small area. Small holes are opened on the fins to improve the heat dissipation effect. The pipe base is provided with a winding thread to further enhance the heat dissipation performance. The cross-sectional shape is oval, circular or oblate, which reduces the air resistance and further increases the heat dissipation area, and the heat dissipation effect is good.

[0023] ③Real-time temperature monitoring and automatic adjustment of the air volume of the forced cooling fan to achieve energy saving. The temperature sensor is used to monitor the inlet and outlet temperatures of the air cooler in real time. When the detected temperature is higher or lower than the set value, the air volume of the forced cooling fan is automatically adjusted, which can ensure sufficient cooling conditions and achieve energy saving.

[0024] ④Real-time pressure monitoring and automatic adjustment of the flow of high-temperature ash gas by the centrifugal multi-stage induced draft fan. The pressure sensor is used to monitor the outlet pressure of the air cooler in real time. When the detected pressure is higher than the set value, an alarm is issued to prompt the centrifugal multi-stage induced draft fan to change the air volume, achieve the purpose of fully cooling the high-temperature ash gas, and have strong self-adaptive ability, stability and energy saving. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 is the overall structure schematic diagram of the present application.

[0026] Figure 2 is the inlet and outlet section structure schematic diagram in Figure 1 .

[0027] Figure 3 is the heat dissipation section structure schematic diagram in Figure 1 .

[0028] Figure 4 is the finned tube structure schematic diagram in Figure 3 .

[0029] Figure 5 is Figure 1 a schematic view of the dust collection section structure in

[0030] Figure 6 is Figure 1 a schematic view of the induction device arrangement in

[0031] In the figure: 1 is the inlet and outlet section, 1-1 is the air inlet, 1-2 is the air inlet chamber, 1-3 is the air inlet chamber bottom plate, 1-4 is the partition, 1-5 is the air outlet chamber bottom plate, 1-6 is the air outlet chamber, 1-7 is the air outlet, 1-8 is the sealing plate, 2 is the heat dissipation section, 2-1 is the high-temperature finned tube group, 2-1-1 is the finned tube, 2-1-1-1 is the fin, 2-1-1-2 is the tube base, 2-1-1-3 is the winding pattern, 2-2 is the low-temperature finned tube group, 2-3 is the forced cooling fan, 2-4 is the guide plate, 3 is the dust collection section, 3-1 is the turning chamber top plate, 3-2 is the dust gas turning chamber, 3-3 is the dust hopper, 3-4 is the valve, 4 is the induction device, 4-1 is the temperature sensor, 4-2 is the pressure sensor. DETAILED DESCRIPTION

[0032] The specific embodiments of the present application will be further described below in conjunction with the accompanying drawings.

[0033] A dust removal system finned tube air cooler, comprising an inlet and outlet section 1, a heat dissipation section 2, a dust collection section 3 and an induction device 4. The heat dissipation section 2 is fixed below the inlet and outlet section 1 to dissipate heat. The dust collection section 3 is fixed below the heat dissipation section 2 to collect and store the settled dust. The induction device 4 is placed in the air inlet 1-1 and the air outlet 1-7 of the inlet and outlet section 1 to monitor the running state of the air cooler in real time.

[0034] The inlet and outlet section 1 is composed of the air inlet 1-1, the air inlet chamber 1-2, the air inlet chamber bottom plate 1-3, the partition 1-4, the air outlet chamber bottom plate 1-5, the air outlet chamber 1-6, the air outlet 1-7 and the sealing plate 1-8. The air inlet 1-1 and the air outlet 1-7 are fixed side by side on one side of the inlet and outlet section 1; the air inlet chamber 1-2 and the air outlet chamber 1-6 are fixed side by side on the air inlet 1-1 and the air outlet 1-7 respectively; the air inlet chamber bottom plate 1-3 and the air outlet chamber bottom plate 1-5 are fixed side by side below the air inlet chamber 1-2 and the air outlet chamber 1-6 respectively. The partition 1-4 is placed in the middle of the air inlet chamber 1-2 and the air outlet chamber 1-6 to separate the two chambers; the sealing plate 1-8 is placed on the air inlet chamber 1-2 and the air outlet chamber 1-6 to seal.

[0035] The heat dissipation section 2 is composed of a high-temperature finned tube group 2-1, a low-temperature finned tube group 2-2, forced cooling fans 2-3 and guide plates 2-4. The high-temperature finned tube group 2-1 and the low-temperature finned tube group 2-2 are placed inside the heat dissipation section 2; both the high-temperature finned tube group 2-1 and the low-temperature finned tube group 2-2 are composed of a plurality of finned tubes 2-1-1 which are combined and welded according to certain rules, and the number of tube layers is reasonably selected to ensure the cooling requirement of the ash gas in the tube. The high-temperature finned tube group 2-1 is welded at the bottom of the air inlet bin bottom plate 1-3 and the top of the turning bin top plate 3-1 of the ash collecting section 3 respectively, and the low-temperature finned tube group 2-2 is welded at the bottom of the air outlet bin bottom plate 1-5 and the top of the turning bin top plate 3-1 of the ash collecting section 3 respectively. A plurality of forced cooling fans 2-3 are placed on one side of the heat dissipation section 2, and the blowing of the forced cooling fans 2-3 is reasonably selected through calculation, which effectively takes away the heat conducted to the wall surface of the high-temperature finned tube group 2-1 and the low-temperature finned tube group 2-2 by the high-temperature ash gas, thereby reducing the temperature of the ash gas. The guide plates 2-4 are located on both sides of the heat dissipation section 2, and guide the flow direction of the airflow blown by the forced cooling fans 2-3.

[0036] The finned tube 2-1-1 is composed of a fin 2-1-1-1 and a tube base 2-1-1-2, and is the core element of heat transfer of the air cooler. Since the heat transfer coefficient of air is very low, the fin 2-1-1-1 is added to the outer surface of the tube base 2-1-1-2 to increase the heat dissipation area; and the heat transfer coefficient between the high-temperature gas in the tube and the outside is calculated to determine the total heat transfer area. The finned tube 2-1-1 is vertically placed, which occupies a small area. The fin 2-1-1-1 is in a wave shape and is wound on the outer surface of the tube base 2-1-1-2 in a thread line manner, thereby increasing the heat dissipation area; the fin 2-1-1-1 is provided with heat dissipation holes, thereby improving the heat dissipation effect. The tube base 2-1-1-2 is provided with a winding thread 2-1-1-3, and the cross-sectional shape is oval, circular or flat circular, thereby reducing the air resistance and increasing the heat dissipation area. Therefore, the device has good heat dissipation effect. The high-temperature finned tube group 2-1 and the low-temperature finned tube group 2-2 are both composed of a plurality of finned tubes 2-1-1 which are welded in a staggered arrangement manner, and the number of the finned tubes 2-1-1 is 120. The height of the fin 2-1-1-1 is 20 mm, and the outer diameter of the tube base 2-1-1-2 is φ63 mm.

[0037] The forced cooling fan 2-3 blows air to take away the heat on the high-temperature finned tube group 2-1 and the low-temperature finned tube group 2-2. The forced cooling fan 2-3 is installed on the side of the low-temperature finned tube group 2-2, blows air from the low-temperature finned tube group 2-2 to the high-temperature finned tube group 2-1, and the blown air realizes positive temperature gradient cooling in the finned tube 2-1-1. Guided by the flow guide plate 2-4, the air flow blown by the forced cooling fan 2-3 all passes through the heat dissipation section 2 in an orderly manner without overflowing, so that the high-temperature finned tube group 2-1 and the low-temperature finned tube group 2-2 are fully cooled. The cooling air flow is orderly and controllable, and the structure significantly enhances the heat dissipation performance, realizes the optimal heat dissipation mode of the heat dissipation section 2, and quickly cools the high-temperature ash gas. The forced cooling fan 2-3 has four, each forced cooling fan 2-3 has a power of 3-250 kW, and each forced cooling fan 2-3 has a supply air volume of 6000-80000 m 3 .

[0038] The ash collecting section 3 is composed of a turning bin top plate 3-1, an ash gas turning bin 3-2, an ash hopper 3-3, and a valve 3-4. The ash hopper 3-3 is conical, which is convenient for collecting and discharging dust; when the dust collected in the ash hopper 3-3 is more, the valve 3-4 is opened to discharge the dust. The ash hopper 3-3 of the air cooler has a plate thickness of 8 mm, and the ash hopper 3-3 has a cone angle of 55°.

[0039] The sensing device 4 includes a temperature sensor 4-1 and a pressure sensor 4-2. The temperature sensor 4-1 is arranged in the air inlet 1-1 and the air outlet 1-7 of the air cooler, and monitors the temperature in real time. When the detected temperature is higher or lower than the set value, the air speed of the forced cooling fan 2-3 is automatically adjusted, so that energy saving is realized on the premise of sufficient cooling conditions. The pressure sensor 4-2 is arranged in the air outlet 1-7 of the air cooler, and monitors the pressure in real time. When the detected pressure is higher than the set value, an alarm is given to change the air volume of the centrifugal multi-stage induced draft fan. The device achieves the purpose of fully cooling the high-temperature ash gas, has strong self-adaptive ability, is stable, and saves energy.

[0040] The specific working process is as follows: The high-temperature ash gas is sucked into the air inlet 1-1 to the air inlet bin 1-2, and then flows through the air inlet bin bottom plate 1-3. The high-temperature ash gas enters the high-temperature finned tube group 2-1, the heat is conducted to the fins 2-1-1-1 and the tube bases 2-1-1-2 of the high-temperature finned tube group 2-1, and the heat is taken away by the forced cooling fan 2-3. The cooled ash gas flows out from the lower end of the high-temperature finned tube group 2-1, turns 180° at the ash gas turning bin 3-2, and is sucked into the low-temperature finned tube group 2-2. The heat is conducted to the fins 2-1-1-1 and the tube bases 2-1-1-2 of the low-temperature finned tube group 2-2, and the heat is further taken away by the forced cooling fan 2-3. The ash gas flows upward through the air outlet bin bottom plate 1-5 to the air outlet bin 1-6, and the cooled ash gas is finally sucked into the next process bag-type dust collector from the air outlet 1-7.

[0041] In the present embodiment, the temperature of the flue gas sucked by the air inlet 1-1 is 700-900°C, and after being cooled by the heat radiating section 2, the temperature of the flue gas at the air outlet 1-7 is reduced to 90°C or below.

[0042] The above-described embodiments should be understood as merely illustrative of the present application and not restrictive of the scope of the present application, and various modifications of the present application by those skilled in the art after reading the present application fall within the scope of the present application as defined by the appended claims.

Claims

1. A fin tube air cooler for a dust removal system, characterized by: The air cooler comprises: an inlet and outlet section (1), a heat dissipation section (2), an ash collection section (3) and a sensing device (4); the heat dissipation section (2) is fixed below the inlet and outlet section (1) and plays a heat dissipation role; the ash collection section (3) is fixed below the heat dissipation section (2) and is used to collect and store settled dust; the sensing device (4) is placed in the air inlet (1-1) and the air outlet (1-7) of the inlet and outlet section (1) and monitors the operating status of the air cooler in real time; The inlet and outlet section (1) is composed of an air inlet (1-1), an air inlet bin (1-2), an air inlet bin bottom plate (1-3), a partition (1-4), an air outlet bin bottom plate (1-5), an air outlet bin (1-6), an air outlet (1-7) and a sealing plate (1-8); the air inlet (1-1) and the air outlet (1-7) are fixed side by side on one side of the inlet and outlet section (1); the air inlet bin (1-2) and the air outlet bin (1-6) are fixed side by side respectively. The air inlet (1-1) and the air outlet (1-7) are fixed to the air inlet bottom plate (1-3) and the air outlet bottom plate (1-5) are fixed side by side to the bottom of the air inlet (1-2) and the air outlet (1-6) respectively; the partition plate (1-4) is placed between the air inlet (1-2) and the air outlet (1-6) to separate the two chambers; the sealing plate (1-8) is covered on the air inlet (1-2) and the air outlet (1-6) to seal; The heat dissipation section (2) is composed of a high-temperature fin tube group (2-1), a low-temperature fin tube group (2-2), a forced cooling fan (2-3) and a guide plate (2-4); the high-temperature fin tube group (2-1) and the low-temperature fin tube group (2-2) are placed inside the heat dissipation section (2); the high-temperature fin tube group (2-1) and the low-temperature fin tube group (2-2) are both formed by welding a plurality of fin tubes (2-1-1) in combination according to a certain rule, and at the same time, the number of tube layers is reasonably selected to ensure the cooling requirement of the ash gas in the tube; the two ends of the high-temperature fin tube group (2-1) are respectively welded to the bottom of the air inlet bin bottom plate (1-3) and the ash collecting section (3). The top of the steering bin top plate (3-1) and the two ends of the low-temperature fin tube group (2-2) are respectively welded to the bottom of the air outlet bin bottom plate (1-5) and the top of the steering bin top plate (3-1) of the ash collecting section (3); a plurality of forced cooling fans (2-3) are placed on one side of the heat dissipation section (2); and by calculating and selecting a reasonable forced cooling fan (2-3) to blow air, the heat of the high-temperature ash gas conducted to the wall surface of the high-temperature fin tube group (2-1) and the low-temperature fin tube group (2-2) is effectively taken away, thereby reducing the temperature of the ash gas; the guide plates (2-4) are located on both sides of the heat dissipation section (2) to guide the flow direction of the air flow blown out by the forced cooling fan (2-3); The finned tube (2-1-1) is composed of fins (2-1-1-1) and a tube base (2-1-1-2). Fins (2-1-1-1) are added to the outer surface of the tube base (2-1-1-2) to increase the heat dissipation area. The total heat exchange area is determined by calculating the heat exchange coefficient between the high-temperature gray gas in the finned tube and the outside. The fins (2-1-1-1) are wavy and wound around the outer surface of the tube base (2-1-1-2) in a threaded manner to increase the heat dissipation area. The fins (2-1-1-1) are provided with small heat dissipation holes to improve the heat dissipation effect. The tube base (2-1-1-2) has a built-in winding pattern (2-1-1-3) with a circular or oblate cross-sectional shape, which reduces air resistance and increases the heat dissipation area. The forced cooling fan (2-3) conducts the ash gas to the high-temperature fin tube group (2-1) and the low-temperature fin tube group (2-2) by blowing air to remove the heat; the forced cooling fan (2-3) is installed on the side of the low-temperature fin tube group (2-2), and blows air from the low-temperature fin tube group (2-2) toward the high-temperature fin tube group (2-1), thereby achieving an optimal heat dissipation mode of the heat dissipation section (2) and rapid cooling of the high-temperature ash gas; The ash collecting section (3) is composed of a deflection bin top plate (3-1), an ash gas deflection bin (3-2), an ash hopper (3-3) and a valve (3-4); the ash hopper (3-3) is conical, which is convenient for collecting and discharging dust; when a large amount of dust is collected in the ash hopper (3-3), the valve (3-4) is opened to discharge the dust; The high-temperature ash gas is sucked into the air inlet bin (1-2) from the air inlet (1-1), and then flows through the air inlet bin bottom plate (1-3). The high-temperature ash gas enters the high-temperature fin tube group (2-1), and the heat is transferred to the fins (2-1-1-1) and the tube base (2-1-1-2) of the high-temperature fin tube group (2-1). The heat is blown away by the forced cooling fan (2-3); the cooled ash gas flows out from the lower end of the high-temperature fin tube group (2-1) and is transferred to the ash gas turning bin. The dust gas turns 180 degrees at (3-2) and is sucked into the low-temperature finned tube group (2-2). The heat is transferred to the fins (2-1-1-1) and the tube base (2-1-1-2) of the low-temperature finned tube group (2-2). The heat is further removed by the forced cooling fan (2-3). The dust gas flows upward through the bottom plate (1-5) of the air outlet bin and arrives at the air outlet bin (1-6). The cooled dust gas is finally sucked into the bag dust collector of the next process from the air outlet (1-7). The sensing device (4) comprises a temperature sensor (4-1) and a pressure sensor (4-2); the temperature sensor (4-1) is placed in the air inlet (1-1) and the air outlet (1-7) of the air cooler, and when the temperature is detected to be higher or lower than a set value, the wind speed of the forced cooling fan (2-3) is automatically adjusted, thereby ensuring energy saving under the premise of sufficient cooling conditions; the pressure sensor (4-2) is placed in the air outlet (1-7) of the air cooler, and when the detected pressure is higher than the set value, an alarm is issued to prompt the centrifugal multi-stage induced draft fan to change the air volume.

2. The fin tube air cooler for a dust removal system according to claim 1, characterized in that: The height of the fin (2-1-1-1) is 6.4 to 25 mm, and the outer diameter of the tube base (2-1-1-2) is φ25 to φ89 mm.

3. The fin tube air cooler for a dust removal system according to claim 1, characterized in that: There are multiple forced cooling fans (2-3), which means 2 to 10 fans; the power of each forced cooling fan (2-3) is 3 to 250kW, and the air supply volume of each forced cooling fan (2-3) is 6000 to 80000m 3 .

4. The fin tube air cooler for a dust removal system according to claim 1, characterized in that: The temperature of the ash gas sucked into the air inlet (1-1) is 700-900°C. After being cooled by the heat dissipation section (2), the temperature of the ash gas at the air outlet (1-7) drops to below 90°C.

5. The fin tube air cooler for a dust removal system according to claim 1, characterized in that: The ash hopper (3-3) of the air cooler has a plate thickness of 4 to 14 mm and a cone angle of 50° to 60°.

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