A dust removal device suitable for high temperature and high humidity environment and a method of using the same

Abstract

The hood is connected to the air filter housing, and the ...

Description

Technical Field

[0001] The present invention belongs to the technical field of environmental engineering, and particularly relates to a dust removal device suitable for high temperature and high humidity environment in a high temperature material slurrying process and a use method thereof. Background Art

[0002] In the process of slurrying various high-temperature minerals with water, a large amount of dust-containing water vapor will be generated. When using a dry dust collector for dust removal, the condensation of water vapor makes the dust agglomerate difficult to discharge and blocks the filter bag. Although wet dust removal can convert the dust into a thin slurry for discharge, it consumes a lot of water and has low dust removal efficiency. Therefore, a dust removal device suitable for high temperature and high humidity environments and a method for using the same are proposed. Summary of the invention

[0003] In order to achieve the above object, the present invention adopts the following technical solution:

[0004] A dust removal device suitable for use in a high-temperature and high-humidity environment comprises a lower cylinder, a lower cone, a throat, an upper cone, an upper cylinder, an upper air inlet, a water sprayer, a lower air inlet, an air-mixing and humidity-regulating valve, a bag dust collector, an induced draft fan and a hygrometer; the bottom end of the lower cylinder is connected to the exhaust port of a pulping system, one end of the lower air inlet is tangentially connected to the cylinder wall of the lower cylinder, the other end of the lower air inlet is connected to the atmosphere, the upper end of the lower cylinder is connected to the large mouth end of the lower cone, the small mouth end of the lower cone is connected to the lower mouth of the throat, the upper mouth of the throat is connected to the small mouth end of the upper cone, the water sprayer is tangentially connected to the throat body, the large mouth end of the upper cone is connected to the upper cylinder The lower end is connected, one end of the upper air inlet is tangentially connected to the wall of the upper cylinder, the other end of the upper air inlet is connected to the atmosphere, the upper end of the upper cylinder is connected to the inlet of the bag-type dust collector through a pipeline, the air-entraining humidity regulating valve and the hygrometer are both installed at the inlet pipe of the bag-type dust collector and are connected to the pipe, the hygrometer is arranged closer to the bag-type dust collector than the air-entraining humidity regulating valve, the air-entraining humidity regulating valve and the hygrometer are interlocked, and the opening of the air-entraining humidity regulating valve is automatically adjusted according to the humidity in the air, thereby controlling the amount of air introduced, so that the humidity of the humid air is reached so that water will not condense in the bag-type dust collector, and the bag-type dust collector outlet is connected to the induced draft fan.

[0005] The lower air inlet is the primary air inlet, the upper air inlet is the secondary air inlet, and the air-injection and humidity-regulating valve is the final air inlet. The upper air inlet, the lower air inlet and the air-injection and humidity-regulating valve are used to cool and dehumidify the humid air and ensure that the humid air does not condense into water.

[0006] A method for using a dust removal device suitable for use in a high temperature and high humidity environment comprises the following steps:

[0007] The dusty water vapor from the pulping system enters the lower cylinder, mixes with the air entering from the lower air inlet, cools and dehumidifies it, and then accelerates through the lower cone before entering the throat to be cooled and dusted by the atomized water brought by the water sprayer. The dusty wet air after dust removal and cooling continues to move upward and enters the upper cone to decelerate and further mix with the air entering from the upper air inlet to reduce the air temperature and humidity. The dusty air with reduced temperature and humidity continues to move upward and further mixes with the air from the air mixing and humidity regulating valve to cool and dehumidify it, so that the temperature of the wet and dusty air is reduced to room temperature. At the same time, the humidity of the air is reduced to the minimum so that no water will condense in the subsequent equipment. The final low-humidity dusty air enters the bag filter to filter out dust. The air with dust that meets the emission standards is discharged into the atmosphere through the induced draft fan. The dry dust filtered by the bag is discharged and reused through the lower part of the bag filter, thus avoiding the low efficiency of the wet dust collector and the clogging of the filter bag and ash discharge by the dry dust collector.

[0008] Beneficial effects of the present invention:

[0009] The present invention is suitable for dust removal devices in high temperature and high humidity environments, avoiding the problem of dust agglomeration and clogging the filter bag due to water vapor condensation and dust being difficult to discharge in a dry dust collector. It also avoids the problem of low dust removal efficiency and difficulty in meeting environmental standards in wet dust removal. At the same time, dust recovery is increased, greatly increasing economic benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 This is a schematic diagram of the structure of the dust removal device of the present invention suitable for use in a high temperature and high humidity environment;

[0011] 1. Lower cylinder, 2. Lower cone, 3. Throat, 4. Upper cone, 5. Upper cylinder, 6. Upper air inlet, 7. Sprinkler, 8. Lower air inlet, 9. Air-blending and humidity-regulating valve, 10. Bag filter, 11. Draft fan, 12. Hygrometer. DETAILED DESCRIPTION

[0012] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments.

[0013] like Figure 1As shown, a dust removal device suitable for use in a high temperature and high humidity environment comprises a lower cylinder 1, a lower cone 2, a throat 3, an upper cone 4, an upper cylinder 5, an upper air inlet 6, a water sprayer 7, a lower air inlet 8, an air mixing and humidity regulating valve 9, a bag dust collector 10, an induced draft fan 11 and a hygrometer 12; the bottom end of the lower cylinder 1 is connected to the exhaust port of the pulping system, one end of the lower air inlet 8 is tangentially connected to the wall of the lower cylinder 1, and the other end of the lower air inlet 8 is connected to the exhaust port of the pulping system. The lower air inlet 8 is connected to the atmosphere, the lower air inlet 8 is the primary air inlet, the upper end of the lower cylinder 1 is connected to the large end of the lower cone 2, the small end of the lower cone 2 is connected to the lower end of the throat 3, the upper end of the throat 3 is connected to the small end of the upper cone 4, the sprinkler 7 is tangentially connected to the throat 3 body, the sprinkler 7 produces highly atomized and high-speed water mist, the large end of the upper cone 4 is connected to the lower end of the upper cylinder 5, one end of the upper air inlet 6 is tangentially connected to the wall of the upper cylinder 5, and the upper air inlet The other end of the air port 8 is connected to the atmosphere, and the upper air inlet 6 is the secondary air inlet. The upper air inlet 6 and the lower air inlet 8 are used to cool and dehumidify the dust-containing water vapor. The upper end of the upper cylinder 5 is connected to the inlet of the bag-type dust collector 10 through a pipeline. The air-mixing humidity regulating valve 9 and the hygrometer 12 are both installed at the inlet pipe of the bag-type dust collector 10 and are connected to the pipe. The hygrometer 12 is closer to the bag-type dust collector 10 than the air-mixing humidity regulating valve 9. The air-mixing humidity regulating valve 9 and the hygrometer 12 are interlocked. The air-mixing humidity regulating valve 9 is the last air inlet, which is used to adjust the final air moisture content. When the hygrometer 12 detects that the air humidity exceeds the standard, the air-mixing humidity regulating valve 9 automatically adjusts the opening to become larger, thereby controlling the amount of air mixed in, so that the humidity of the humid air reaches a level that no water will condense in the bag-type dust collector 10. The outlet of the bag-type dust collector 10 is connected to the induced draft fan 11, and the induced draft fan 11 provides power for the entire dust removal system.

[0014] A method for using a dust removal device suitable for use in a high temperature and high humidity environment comprises the following steps:

[0015] The dusty water vapor from the pulping system enters the lower cylinder 1, mixes with the air entering from the lower air inlet 8 for cooling and dehumidification, and then accelerates through the lower cone 2 and enters the throat 3 to be cooled and dusted by the atomized water brought by the water sprayer 7. The dusty wet air after dust removal and cooling continues to move upward and enters the upper cone 4 to slow down and mix with the air entering from the upper air inlet 6 for a second time to reduce the air temperature and humidity. The dusty air with reduced temperature and humidity continues to move upward and further mixes with the air from the air mixing and humidity regulating valve 9 to cool and dehumidify, so that the temperature of the wet and dusty air is reduced to room temperature, and at the same time, the humidity of the air is reduced to the minimum so that no water will condense in the subsequent equipment. The final low-humidity dusty air enters the bag filter 10 to filter out dust, and the air with dust that meets the emission standards is discharged into the atmosphere through the induced draft fan 11. The dry dust filtered by the bag is discharged through the lower part of the bag filter 10 for reuse, thus avoiding the low efficiency of the wet dust collector and the clogging of the filter bag and ash discharge by the dry dust collector.

Claims

1. A method for using a dust removal device suitable for a high temperature and high humidity environment, which is implemented by using a dust removal device suitable for a high temperature and high humidity environment, the dust removal device comprising a lower cylinder, a lower cone, a throat, an upper cone, an upper cylinder, an upper air inlet, a water sprayer, a lower air inlet, an air mixing and humidity regulating valve, a bag dust collector, an induced draft fan and a hygrometer; the bottom end of the lower cylinder is connected to the exhaust port of the pulping system, one end of the lower air inlet is tangentially connected to the cylinder wall of the lower cylinder, the other end of the lower air inlet is connected to the atmosphere, the upper end of the lower cylinder is connected to the large end of the lower cone, and the small end of the lower cone is connected to the throat The lower opening of the tube is connected, the upper opening of the throat is connected with the small opening end of the upper cone, the water sprayer is connected tangentially with the throat pipe body, the large opening end of the upper cone is connected with the lower end of the upper cylinder, one end of the upper air inlet is connected tangentially with the cylinder wall of the upper cylinder, the other end of the upper air inlet is connected with the atmosphere, the upper end of the upper cylinder is connected with the inlet of the bag dust collector through a pipeline, the air mixing humidity regulating valve and the hygrometer are both installed at the inlet pipeline of the bag dust collector and are connected with the pipeline, the hygrometer is arranged closer to the bag dust collector than the air mixing humidity regulating valve, the air mixing humidity regulating valve and the hygrometer are interlocked, and the outlet of the bag dust collector is connected with the induced draft fan; The lower air inlet is the primary air inlet, the upper air inlet is the secondary air inlet, the air mixing and humidity regulating valve is the final air inlet, and the upper air inlet, the lower air inlet and the air mixing and humidity regulating valve are used to cool and dehumidify the humid air; It is characterized in that The following steps are involved: The dust-containing water vapor from the pulping system enters the lower cylinder, mixes with the air entering from the lower air inlet to cool and dehumidify, and then passes through the lower cone to accelerate and enter the throat to be cooled and dusted by the atomized water brought by the water sprinkler. The dust-containing wet air after dust removal and cooling continues to move upward and enters the upper cone to slow down and further mix with the air entering from the upper air inlet to reduce the air temperature and humidity. The dust-containing air with reduced temperature and humidity continues to move upward and is further mixed with the air from the air mixing and humidity regulating valve to cool and dehumidify, so that the temperature of the wet and dusty air is reduced to room temperature. At the same time, the humidity of the air is reduced to the minimum so that no water will condense in the subsequent equipment. The final low-humidity dust-containing air enters the bag filter to filter out dust, and the air with dust that meets the emission standards is discharged into the atmosphere through the induced draft fan, and the dry dust filtered out by the bag is discharged through the lower part of the bag filter for reuse.

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