Furnace smoke drying exhaust hot air composite powder feeding device

Abstract

The utility model relates to the technical field of exhaust gas utilization, in particular to a flue gas drying exhaust gas hot air composite powder feeding device, which adjusts the output angle of powder in a boiler through an adjusting device, so that the powder can be uniformly distributed in a combustion chamber, the powder is uniformly fed into the adjusting device through a material homogenizing device, and the output angle of the powder in the boiler is adjusted. The feeding speed of the powder is controlled and adjusted through the feeding device, so that the practicability of the device is improved; comprising an adjusting device, a material uniformizing device and a feeding device, the material uniformizing device is installed on the adjusting device, and the feeding device is connected with the material uniformizing device.

Description

Technical Field

[0001] This utility model relates to the technical field of exhaust gas utilization, and in particular to a combined hot air powder feeding device for exhaust gas from flue gas drying. Background Technology

[0002] Exhaust gas is low-temperature steam that is not contaminated and is carried in the high-temperature condensate discharged from steam equipment. Since exhaust gas is mainly composed of water vapor and does not contain harmful substances, it can be returned to the boiler or feedwater system to improve the thermal efficiency of the entire steam system. In boiler production, the principle of exhaust gas pulverized fuel feeding is to use the airflow to draw powdered fuel from the storage bin and inject it into the boiler's combustion chamber at a certain speed through pipelines. This helps to improve fuel combustion efficiency and energy utilization, and is an indispensable part of boiler equipment.

[0003] The existing Chinese utility model patent with application number CN201020109794.2 relates to a dual-medium coal feeding system of exhaust gas and hot air, including a boiler, air preheater, blower, coal feeder, wood block separator, explosion-proof door, fine powder separator, fan, exhaust gas air box and burner, etc., which can effectively ensure that the main burner zone operates under a low excess air coefficient and significantly reduce the amount of NOx generated.

[0004] However, in actual use, the exhaust gas carries pulverized coal into the boiler, and the pulverized coal falls in a concentrated area, resulting in uneven distribution of the powdered combustion material, which leads to a decrease in energy utilization and a reduction in filtration and heating efficiency. Utility Model Content

[0005] To solve the above-mentioned technical problems, this utility model provides a combined pulverized coal feeding device for flue gas drying, exhaust gas, and hot air. The device adjusts the output angle of the powder in the boiler, thereby enabling the powder to be evenly distributed in the combustion chamber. The powder is evenly fed into the adjusting device by a material distribution device to ensure that the powder is subsequently added evenly to the combustion chamber. The feeding device controls and adjusts the powder feeding rate, thereby improving the practicality of the device.

[0006] This utility model discloses a combined pulverized coal feeding device for flue gas drying, exhaust gas, and hot air; it includes an adjusting device, a uniform feeding device, and a feeding device. The uniform feeding device is installed on the adjusting device, and the feeding device is connected to the uniform feeding device. The adjusting device adjusts the output angle of the pulverized coal in the boiler, thereby enabling the pulverized coal to be evenly distributed in the combustion chamber. The uniform feeding device evenly feeds the pulverized coal into the adjusting device to ensure that the pulverized coal is subsequently added evenly to the combustion chamber. The feeding device controls and adjusts the rate at which the pulverized coal is added, thus improving the practicality of the device.

[0007] Preferably, the regulating device includes a feeding duct, a regulating groove, a regulating shaft, a discharge guide plate, a high-temperature electric cylinder, a first rotating shaft seat, and a second rotating shaft seat. The regulating groove is located on the lower side of the output end of the feeding duct. The input end of the feeding duct is connected to a blower. A regulating shaft is installed on the right side of the regulating groove. A discharge guide plate is connected to the side of the regulating shaft. The lower end face of the discharge guide plate is connected to the moving end of the high-temperature electric cylinder via the first rotating shaft seat. The fixed end of the high-temperature electric cylinder is connected to the bottom end face of the regulating groove via the second rotating shaft seat. By controlling the continuous extension and retraction of the high-temperature electric cylinder, the discharge guide plate rotates up and down around the regulating shaft, thereby guiding the gas and powder output from the output end of the feeding duct, changing the output angle of the powdered fuel, and thus ensuring that the powdered fuel is evenly distributed in the combustion chamber, improving the combustion efficiency and energy utilization rate of the equipment.

[0008] Preferably, the device also includes an input dust baffle and an output dust baffle. An input dust baffle is provided on the upper part of the right end face of the regulating trough, covering the upper side of the regulating shaft. An output dust baffle is connected to the left end face of the discharge guide plate, covering the gap between the discharge guide plate and the left side of the regulating trough. By using the input dust baffle and the output dust baffle, the amount of powder entering the regulating trough during the powdered fuel conveying process is reduced, thereby reducing the maintenance frequency, reducing the maintenance cost of the equipment, and improving the practicality of the device.

[0009] Preferably, the material equalization device includes a material equalization box, arc-shaped plates, bidirectional spiral blades, a reducer, and a motor. The material equalization box is connected to the middle of the upper end face of the feeding duct. A set of arc-shaped plates is respectively arranged on the left and right sides of the middle of the material equalization box. A bent guide plate is arranged on the upper part of the arc-shaped plates, and the two sets of guide plates are V-shaped. A bidirectional spiral blade is installed in the middle of the material equalization box, located between the two sets of arc-shaped plates, with the upper part of the bidirectional spiral blade close to the inner surface of the two sets of arc-shaped plates. A reducer is installed on the front end face of the material equalization box, and the output of the reducer... The end is connected to the bidirectional spiral blades, and a motor is installed on the reducer. When the motor is turned on, the power is transmitted to the bidirectional spiral blades through the reducer, which drives the bidirectional spiral blades to rotate, scattering the powder from the top of the material distribution box. The rotating bidirectional spiral blades, in conjunction with two sets of arc-shaped plates, transport the powder to both sides, so that the powder can fall evenly into the inside of the feeding duct, and then evenly enter the boiler combustion chamber. The guide plates on the arc-shaped plates guide most of the falling powder into the space between the two sets of arc-shaped plates, improving the practicality of the device.

[0010] Preferably, it also includes a vibration motor, which is installed on the outer side of the guide plate of the arc-shaped plate; when the vibration motor is turned on, the power is transmitted to the arc-shaped plate to drive the arc-shaped plate to vibrate, thereby increasing the falling rate of the powder and improving the working efficiency of the equipment.

[0011] Preferably, the feeding device includes a feeding hopper, feeding spiral blades, a geared motor, and a feeding bend. The feeding hopper is located above the equalization box and the feeding spiral blades are installed inside it. The geared motor is installed on the left end face of the feeding hopper, and the output end of the geared motor is connected to the feeding spiral blades. The feeding bend is connected to the output end of the feeding hopper. When the powder is added to the feeding hopper, the geared motor is turned on to transmit power to the feeding spiral blades, which drive the feeding spiral blades to rotate, thereby uniformly outputting the powder. By controlling the speed of the geared motor, the feeding speed of the powder is controlled, which improves the practicality of the device.

[0012] Preferably, it also includes a rectangular feed inlet and a reducing connector. A rectangular feed inlet is provided in the middle of the upper end face of the material distribution box. The output end of the feeding bend is connected to the input end of the rectangular feed inlet through the reducing connector. The rectangular design of the rectangular feed inlet itself ensures that most of the powder falls into the area between the two sets of arc plates, which improves the practicality of the device.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows: the output angle of the powder in the boiler is adjusted by the adjusting device, so that the powder can be evenly distributed in the combustion chamber; the powder is evenly fed into the adjusting device by the uniform feeding device to ensure that the powder is evenly added to the combustion chamber in the future; the powder addition rate is controlled and adjusted by the feeding device, which improves the practicality of the device. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the isometric structure of this utility model;

[0015] Figure 2 This is a first cross-sectional structural diagram of the present invention;

[0016] Figure 3 This is a schematic diagram of the second cross-sectional structure of this utility model;

[0017] Figure 4 This is a partially enlarged structural schematic diagram of the present invention;

[0018] The following are labels in the attached diagram: 1. Feeding duct; 2. Adjusting groove; 3. Adjusting shaft; 4. Discharge guide plate; 5. High-temperature electric cylinder; 6. First shaft seat; 7. Second shaft seat; 8. Input dust baffle; 9. Output dust baffle; 10. Material distribution box; 11. Arc-shaped plate; 12. Bidirectional spiral blade; 13. Reducer; 14. Electric motor; 15. Vibrating motor; 16. Feeding bin; 17. Feeding spiral blade; 18. Gear motor; 19. Feeding bend; 20. Rectangular feed inlet; 21. Variable diameter joint. Detailed Implementation

[0019] To facilitate understanding of this utility model, a more complete description will be given below with reference to the accompanying drawings. This utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to make the disclosure of this utility model more thorough and complete. Example

[0020] like Figure 1 , Figure 2 , Figure 3 and Figure 4 The material distribution device shown is installed on the regulating device, and the feeding device is connected to the material distribution device;

[0021] First, the powder is added to the feeding hopper 16 and the geared motor 18 is turned on to transmit power to the feeding spiral blades 17, which rotates the feeding spiral blades 17, thus outputting the powder evenly. Then, the motor 14 is turned on to transmit power to the bidirectional spiral blades 12 through the reducer 13, which rotates the bidirectional spiral blades 12, scattering the powder from the top of the equalization box 10. The rotating bidirectional spiral blades 12, together with two sets of arc-shaped plates 11, transport the powder to both sides, so that the powder can fall evenly into the feeding duct 1. Then, the exhaust gas is sent into the feeding duct 1 by the fan at the input end of the feeding duct 1, which drives the fuel powder to move towards the output end of the feeding duct 1. Then, by controlling the high-temperature electric cylinder 5 to continuously extend and retract, the discharge guide plate 4 is continuously rotated up and down around the adjusting shaft 3, thereby guiding the gas and powder output from the output end of the feeding duct 1 and changing the output angle of the powdered fuel.

[0022] The adjustment device includes a feeding duct 1, an adjustment groove 2, an adjustment shaft 3, a discharge guide plate 4, a high-temperature electric cylinder 5, a first shaft seat 6, and a second shaft seat 7. The adjustment groove 2 is provided on the lower side of the output end of the feeding duct 1. The input end of the feeding duct 1 is connected to the blower. The adjustment shaft 3 is installed on the right side of the adjustment groove 2. The discharge guide plate 4 is connected to the side of the adjustment shaft 3. The middle of the lower end face of the discharge guide plate 4 is connected to the moving end of the high-temperature electric cylinder 5 through the first shaft seat 6. The fixed end of the high-temperature electric cylinder 5 is connected to the bottom end face of the adjustment groove 2 through the second shaft seat 7.

[0023] It also includes an input dust baffle 8 and an output dust baffle 9. An input dust baffle 8 is provided on the upper part of the right end face of the adjusting groove 2. The input dust baffle 8 covers the upper side of the adjusting shaft 3. An output dust baffle 9 is connected to the left end face of the discharge guide plate 4. The output dust baffle 9 covers the gap between the discharge guide plate 4 and the left side of the adjusting groove 2.

[0024] The material equalization device includes a material equalization box 10, an arc-shaped plate 11, a bidirectional spiral blade 12, a reducer 13, and a motor 14. The material equalization box 10 is connected to the middle of the upper end face of the feeding air duct 1. A set of arc-shaped plates 11 are respectively arranged on the left and right sides of the middle of the material equalization box 10. A bent guide plate is arranged on the upper part of the arc-shaped plate 11. The two sets of guide plates are V-shaped. A bidirectional spiral blade 12 is installed in the middle of the material equalization box 10. The bidirectional spiral blade 12 is located between the two sets of arc-shaped plates 11, and the upper part of the bidirectional spiral blade 12 is close to the inner side of the two sets of arc-shaped plates 11. A reducer 13 is installed on the front end face of the material equalization box 10. The output end of the reducer 13 is connected to the bidirectional spiral blade 12. A motor 14 is installed on the reducer 13.

[0025] It also includes a vibration motor 15, which is installed on the outer side of the guide plate of the arc-shaped plate 11;

[0026] The feeding device includes a feeding bin 16, a feeding spiral blade 17, a geared motor 18, and a feeding bend 19. The feeding spiral blade 17 is installed inside the feeding bin 16. The feeding bin 16 is located on the upper side of the equalization box 10. The geared motor 18 is installed on the left end face of the feeding bin 16. The output end of the geared motor 18 is connected to the feeding spiral blade 17. The feeding bend 19 is connected to the output end of the feeding bin 16.

[0027] It also includes a rectangular feed inlet 20 and a reducing connector 21. A rectangular feed inlet 20 is provided in the middle of the upper end face of the material distribution box 10. The output end of the feeding bend 19 is connected to the input end of the rectangular feed inlet 20 through the reducing connector 21.

[0028] The output angle of the powder in the boiler is adjusted by the regulating device, so that the powder can be evenly distributed in the combustion chamber. The powder is evenly fed into the regulating device by the uniform feeding device to ensure that the powder is evenly added to the combustion chamber in the future. The powder addition rate is controlled and adjusted by the feeding device, which improves the practicality of the device.

[0029] like Figures 1 to 4As shown, this utility model discloses a combined hot air and flue gas powder feeding device for flue gas drying. During operation, powder is first added to the feeding hopper 16, and the geared motor 18 is turned on to transmit power to the feeding spiral blades 17, causing them to rotate and thus uniformly output the powder. The motor 14 is then turned on, transmitting power through the reducer 13 to the bidirectional spiral blades 12, causing them to rotate and scatter the powder from the top of the equalization box 10. The rotating bidirectional spiral blades 12, in conjunction with two sets of arc-shaped plates 11, transport the powder to both sides, ensuring it falls evenly into the feeding duct 1. Then, the fan at the input end of the feeding duct 1 sends exhaust gas into the duct 1, moving the fuel powder towards the output end. Finally, by controlling the high-temperature electric cylinder 5 to continuously extend and retract, the discharge guide plate 4 rotates up and down around the adjusting shaft 3, guiding the gas and powder output from the output end of the feeding duct 1 and changing the output angle of the powdered fuel.

[0030] The geared motor 18, reducer 13, electric motor 14, high-temperature electric cylinder 5, and vibration motor 15 of the flue gas drying exhaust gas hot air composite powder feeding device of this utility model are commercially available. Technical personnel in this industry only need to install and operate them according to the accompanying instruction manual, without requiring any creative work from those skilled in the art.

[0031] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A combined hot air and powder feeding device for flue gas drying; characterized in that, It includes an adjustment device, a uniform material device, and a feeding device. The uniform material device is installed on the adjustment device, and the feeding device is connected to the uniform material device. The adjustment device includes a feeding air pipe (1), an adjustment groove (2), an adjustment shaft (3), a discharge guide plate (4), a high-temperature electric cylinder (5), a first shaft seat (6), and a second shaft seat (7). An adjustment groove (2) is provided on the lower side of the output end of the feeding air pipe (1). The input end of the feeding air pipe (1) is connected to a blower. An adjustment shaft (3) is installed on the right side of the adjustment groove (2). A discharge guide plate (4) is connected to the side of the adjustment shaft (3). The middle part of the lower end face of the discharge guide plate (4) is connected to the moving end of the high-temperature electric cylinder (5) through the first shaft seat (6). The fixed end of the high-temperature electric cylinder (5) is connected to the bottom end face of the adjustment groove (2) through the second shaft seat (7).

2. The combined hot air and flue gas powder feeding device for flue gas drying as described in claim 1, characterized in that, It also includes an input dust baffle (8) and an output dust baffle (9). An input dust baffle (8) is provided on the upper part of the right end face of the adjusting groove (2). The input dust baffle (8) covers the upper side of the adjusting shaft (3). An output dust baffle (9) is connected to the left end face of the discharge guide plate (4). The output dust baffle (9) covers the gap between the discharge guide plate (4) and the left side of the adjusting groove (2).

3. The combined hot air and flue gas powder feeding device for flue gas drying as described in claim 2, characterized in that, The material equalization device includes a material equalization box (10), an arc plate (11), a bidirectional spiral blade (12), a reducer (13), and a motor (14). The material equalization box (10) is connected to the middle of the upper end face of the feeding air duct (1). A set of arc plates (11) are respectively arranged on the left and right sides of the middle of the material equalization box (10). A bent guide plate is arranged on the upper part of the arc plate (11). The two sets of guide plates are V-shaped. A bidirectional spiral blade (12) is installed in the middle of the material equalization box (10). The bidirectional spiral blade (12) is located between the two sets of arc plates (11) and the upper part of the bidirectional spiral blade (12) is close to the inner side of the two sets of arc plates (11). A reducer (13) is installed on the front end face of the material equalization box (10). The output end of the reducer (13) is connected to the bidirectional spiral blade (12). A motor (14) is installed on the reducer (13).

4. The combined hot air and flue gas powder feeding device for flue gas drying as described in claim 3, characterized in that, It also includes a vibration motor (15), which is installed on the outer side of the guide plate of the arc-shaped plate (11).

5. The combined hot air and flue gas powder feeding device for flue gas drying as described in claim 4, characterized in that, The feeding device includes a feeding bin (16), a feeding spiral blade (17), a geared motor (18), and a feeding bend (19). The feeding bin (16) is equipped with a feeding spiral blade (17). The feeding bin (16) is located on the upper side of the equalization box (10). The geared motor (18) is installed on the left end face of the feeding bin (16). The output end of the geared motor (18) is connected to the feeding spiral blade (17). The feeding bend (19) is connected to the output end of the feeding bin (16).

6. The combined hot air and flue gas powder feeding device for flue gas drying as described in claim 5, characterized in that, It also includes a rectangular feed inlet (20) and a reducing connector (21). A rectangular feed inlet (20) is provided in the middle of the upper end face of the material distribution box (10). The output end of the feeding bend (19) is connected to the input end of the rectangular feed inlet (20) through the reducing connector (21).

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