Device for preventing dewing of filter bag of dust remover

Abstract

The utility model relates to the field of waste incineration flue gas purification, in particular to a dewing prevention device for a filter bag of a dust remover, which comprises an inlet flue baffle plate, an outlet flue baffle plate, an ash bucket electric heating device and the dust remover, a cavity is arranged in the dust remover, and a dust remover inlet and a dust remover outlet are arranged on two sides of the dust remover. The inlet flue baffle plate is arranged at an inlet of the dust remover, the outlet flue baffle plate is arranged at an outlet of the dust remover, and the ash bucket electric heating device is arranged at the inner bottom of the dust remover. By arranging the inlet flue baffle door, the outlet flue baffle door and the ash bucket electric heating device with the temperature remote transmission function, the interior of the dust remover is heated after furnace shutdown and ash removal, the internal temperature is made to be higher than the dew point temperature, the filter bag is prevented from dewing, and normal operation of the dust remover is guaranteed; high-power electric heaters such as a hot air circulating fan are omitted, and manufacturing cost and operation energy consumption are reduced.

Description

[Technical field]

[0001] The utility model relates to the field of waste incineration smoke purification, and more specifically, to a dust collector filter bag condensation prevention device. [Background technology]

[0002] Bag filter is a dry dust filter device, which is suitable for capturing fine, dry and non-fibrous dust. The filter bag is made of textile filter cloth or non-textile felt, and uses the filtering effect of fiber fabric to filter dust-containing gas. During the use of bag filter, there are often factors such as air leakage, poor insulation, and the temperature of the sprayed air is lower than the pressure dew point, which causes the temperature entering the dust collector flue gas chamber to be lower than the flue gas dew point, resulting in condensation on the filter bag, corrosion of the filter bag, and bag sticking, which seriously shortens the service life of the filter bag and affects the normal operation of the dust collector.

[0003] In order to ensure that the bag filter can work normally, necessary drying means or insulation measures must be taken to ensure that the moisture in the gas will not condense. In a waste incineration power plant, after the boiler is shut down, the temperature in the bag filter is lowered, and the filter bags are prone to condensation and sticking. In order to prevent the filter bags from condensing, some power plants will install a hot air circulation system, and preheat the bag filter by activating the hot air circulation system after the boiler is shut down. An existing hot air circulation system is mainly composed of a flue damper door, a hot circulation fan, an electric heater, a sealed fan, a sealed air heater, valves and pipes. After a period of time after the hot air circulation system is turned on, the temperature in the bag filter can reach above the dew point to prevent the filter bags from condensing. However, due to the large installed power of the hot air circulation system equipment, it consumes more electricity in operation. In addition, the system is shut down before the boiler unit is started. After the induced draft fan is turned on, the heat in the bag filter will be taken away, and the filter bags are still at risk of condensation. [Contents of the utility model]

[0004] In order to overcome the above-mentioned defects of the prior art, the purpose of the utility model is to provide a dust collector filter bag anti-condensation device, which can reduce costs and energy consumption.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a dust collector filter bag condensation prevention device, comprising an inlet flue baffle plate, an outlet flue baffle plate, an ash hopper electric heating device, and a dust collector, wherein a cavity is arranged inside the dust collector, and a dust collector inlet and a dust collector outlet are arranged on both sides of the dust collector, the inlet flue baffle plate is arranged at the dust collector inlet, the outlet flue baffle plate is arranged at the dust collector outlet, and the ash hopper electric heating device is arranged at the bottom of the dust collector.

[0006] Preferably, the inlet flue damper plate and the outlet flue damper plate are pneumatic or electric dampers.

[0007] Preferably, the ash hopper electric heating device can heat the inside of the dust collector and control the temperature at 140-150°C.

[0008] Preferably, the ash hopper electric heating device is connected to a temperature remote transmitter.

[0009] Preferably, the dust collector comprises a dust collector inlet, a dust collector outlet, an upper chamber of the dust collector, a flower plate, filter bags, and a lower chamber of the dust collector. The dust collector inlet is connected to the lower chamber of the dust collector. A flower plate is provided on the top of the lower chamber of the dust collector. The upper side of the flower plate is connected to the upper chamber of the dust collector. The upper chamber of the dust collector is connected to the dust collector outlet, and the flower plate is connected downward to a plurality of filter bags.

[0010] Preferably, the height at which the dust collector inlet is arranged is lower than the height at which the dust collector outlet is arranged.

[0011] Preferably, the upper chamber of the dust collector is a clean air chamber.

[0012] Preferably, a dust discharge port is provided at the bottom of the lower chamber of the dust collector.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] 1. The utility model is a dust collector filter bag condensation prevention device, which is equipped with an inlet flue baffle door, an outlet flue baffle door, and an ash hopper electric heating device with remote temperature transmission. It can heat the inside of the dust collector after the furnace is shut down and the ash is cleaned, so that the temperature inside the bag dust collector is higher than the dew point temperature, thereby preventing the filter bag from condensing and ensuring the normal operation of the dust collector.

[0015] 2. Compared with the hot air circulation system, the utility model of a dust collector anti-condensation device for filter bags can achieve the same function of protecting filter bags and preventing condensation, while eliminating high-power electric heaters such as hot air circulation fans, thereby reducing manufacturing costs and operating energy consumption.

Brief Description of the Drawings

[0016] Figure 1 This is a schematic diagram of the structure of a dust collector anti-condensation device for filter bags of the utility model;

[0017] Figure 2 This is a schematic diagram of a dust collector anti-condensation device for filter bags of the utility model when in use;

[0018] In the figure: 1-inlet flue damper plate, 2-outlet flue damper plate, 3-ash hopper electric heating device, 4-dust collector, 5-dust collector inlet, 6-dust collector outlet, 7-dust collector upper chamber, 8-flower plate, 9-filter bag, 10-dust collector lower chamber. [Specific implementation method]

[0019] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0020] See also Figure 1 In the embodiment of the utility model, a dust collector anti-condensation device for filter bags includes an inlet flue baffle plate 1, an outlet flue baffle plate 2, an ash hopper electric heating device 3, and a dust collector 4. The dust collector 4 includes a dust collector inlet 5, a dust collector outlet 6, a dust collector upper chamber 7, a flower plate 8, a filter bag 9, and a dust collector lower chamber 10. The dust collector inlet 5 is connected to the dust collector lower chamber 10. The top of the dust collector lower chamber 10 is provided with a flower plate 8, and the bottom of the dust collector lower chamber 8 is provided with an ash discharge port. The upper side of the flower plate 8 is connected to the dust collector upper chamber 7. The upper chamber 7 of the dust collector is a clean air chamber connected to the dust collector outlet 6, the flower plate 8 is connected downwardly to a plurality of filter bags 9, the inlet flue baffle plate 1 is arranged at the dust collector inlet 5, the outlet flue baffle plate 2 is arranged at the dust collector outlet 6, the inlet flue baffle plate 1 and the outlet flue baffle plate 2 are pneumatic or electric baffle plates, the ash hopper electric heating device 3 is connected to a temperature remote transmitter, the ash hopper electric heating device 3 is arranged at the bottom of the dust collector 4, the ash hopper electric heating device 3 heats the inside of the dust collector 4 and controls the temperature at 140-150°C.

[0021] Working principle:

[0022] See also Figure 2 The utility model discloses a device for preventing condensation of filter bags of a dust collector. After the boiler is shut down, the filter bags 9 are cleaned first, and then the pneumatic or electric inlet flue baffle plate 1 and the outlet flue baffle plate 2 are closed, and the ash hopper electric heating device 3 is turned on at the same time to control the internal temperature at 140-150°C. The air temperature in the ash hopper rises, the hot air rises, and the cold air falls, forming convection. Finally, the temperature in the bag filter 4 is higher than the dew point temperature, thereby achieving the purpose of preventing condensation of the filter bags 9.

[0023] The above embodiments are intended to illustrate the present invention, not to limit the present invention. Any solution that is a simple transformation of the present invention falls within the protection scope of the present invention.

Claims

1. A dust collector filter bag condensation prevention device, characterized in that: The invention comprises an inlet flue damper plate (1), an outlet flue damper plate (2), an ash hopper electric heating device (3), and a dust collector (4); the dust collector (4) is provided with a cavity inside, a dust collector inlet (5) and a dust collector outlet (6) are provided on both sides of the dust collector (4); the inlet flue damper plate (1) is arranged at the dust collector inlet (5), the outlet flue damper plate (2) is arranged at the dust collector outlet (6), and the ash hopper electric heating device (3) is arranged at the bottom of the dust collector (4).

2. A dust collector filter bag anti-condensation device according to claim 1, characterized in that: The inlet flue door baffle plate (1) and the outlet flue door baffle plate (2) are pneumatic or electric baffle plates.

3. A dust collector anti-condensation device for filter bags according to claim 1, characterized in that: The ash hopper electric heating device (3) can heat the inside of the dust collector (4) and control the temperature at 140-150°C.

4. A dust collector anti-condensation device for filter bags according to claim 3, characterized in that: The ash hopper electric heating device (3) is connected to a temperature remote transmitter.

5. The dust collector anti-condensation device for filter bags according to claim 1, characterized in that: The dust collector (4) comprises a dust collector inlet (5), a dust collector outlet (6), an upper chamber (7) of the dust collector, a flower plate (8), filter bags (9), and a lower chamber (10) of the dust collector. The dust collector inlet (5) is connected to the lower chamber (10) of the dust collector. A flower plate (8) is provided on the top of the lower chamber (10). The upper side of the flower plate (8) is connected to the upper chamber (7) of the dust collector. The upper chamber (7) of the dust collector is connected to the dust collector outlet (6). The flower plate (8) is connected downward to a plurality of filter bags (9).

6. A dust collector filter bag anti-condensation device as claimed in claim 5, characterized in that: The height at which the dust collector inlet (5) is arranged is lower than the height at which the dust collector outlet (6) is arranged.

7. A dust collector anti-condensation device for filter bags according to claim 5, characterized in that: The upper chamber (7) of the dust collector is a clean air chamber.

8. A dust collector anti-condensation device for filter bags according to claim 5, characterized in that: The bottom of the dust collector lower chamber (10) is provided with a dust discharge port.

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