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Flue gas dedusting device

A dust removal device and flue gas technology, applied in gas treatment, dispersed particle separation, chemical instruments and methods, etc., can solve problems such as increasing equipment operation and maintenance costs, reducing the service life of ceramic filter materials, and thermal shock damage to ceramic materials, etc. Achieve the effect of reducing equipment operation and maintenance costs, improving energy utilization, and effective waste heat recovery

Inactive Publication Date: 2017-02-22
INST OF PROCESS ENG CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The second type of dust removal equipment is to remove dust from high-temperature flue gas first, and then perform denitrification and flue gas waste heat recovery. However, the commonly used bag filter and electrostatic precipitator in this method will be difficult to use, and new filter materials need to be selected , while the ceramic filter material can withstand higher flue gas temperature and can be used for filtering high temperature flue gas
[0004] The defects of the above-mentioned first type of equipment are: it is impossible to directly filter the high-temperature dusty flue gas, and since the denitrification device and the air preheater are both operating in the environment of high dusty flue gas, the problems of blockage, wear and corrosion are serious, which greatly improves the Equipment operation and maintenance costs; the defects of the second type of equipment are: in practical applications, due to the high brittleness of ceramic materials and poor thermal shock resistance, high flue gas temperature and large temperature fluctuations will have a huge impact on ceramic materials. thermal shock damage, reducing the service life of ceramic filter materials

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] This preferred embodiment discloses a flue gas dust removal device. like figure 1 and figure 2 As shown, the flue gas dedusting device includes a housing 1, a thermal insulation layer 2 attached to the inner wall of the housing 1, a flower plate 9 that divides the housing 1 into a dust collection chamber and a clean air chamber, and Heat exchange element and temperature measuring thermocouple 7, ceramic filter structure 5, cover plate 10 covered above ceramic filter structure 5, ash unloading valve 17 located at the bottom of shell 1, ash cleaner 3 fixed on shell 1 and Back blowing dust removal components.

[0031] The part above the flower plate 9 is a clean air chamber, and the part below is a dust collection chamber; the two sides of the shell 1 are respectively provided with a smoke inlet 16 and a smoke outlet 8, and the smoke inlet 16 is connected with the dust collection chamber, and the smoke outlet Port 8 communicates with the clean air chamber; one end of t...

Embodiment 2

[0043] This preferred embodiment discloses a flue gas dust removal device, which is basically the same as the device described in the preferred embodiment 1, such as image 3 As shown, it includes a housing 1, a flower plate 9 that divides the housing 1 into a dust collection chamber and a clean air chamber, heat exchange elements and temperature measuring thermocouples 7 located in the dust collection chamber, and a ceramic filter structure 5, wherein, A plurality of through holes are opened on the flower plate 9, and the ceramic filter structure 5 is at least partially installed in the through holes; the two sides of the housing 1 are respectively provided with a smoke inlet 16 and a smoke outlet 8, and the smoke inlet 16 communicates with the dust collection chamber , The smoke outlet 8 communicates with the clean air chamber.

[0044] The difference is that the ceramic fiber filter plate is a single-layer fiberboard pressed from mullite fibers, or the ceramic fiber filter ...

Embodiment 3

[0046] This preferred embodiment discloses a flue gas dust removal device, which is basically the same as the device described in the second preferred embodiment. The difference is that in order to increase the heat exchange area and improve the heat exchange efficiency, the outer wall of the heat exchange tube 4 is provided with a plurality of heat exchange fins 41, such as Figure 4 and Figure 5 shown. In addition, heat exchange ribs or other raised structures can also be provided on the outer wall of the heat exchange tube 4 to improve heat exchange efficiency. After the heat exchange fins 41 or heat exchange ribs are installed, the problem of dust accumulation on the heat exchange tube 4 is serious. Therefore, the cleaning time interval of the dust collector needs to be shortened.

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Abstract

The invention discloses a flue gas dedusting device and belongs to the technical field of flue gas dedusting purification equipment. The flue gas dedusting device is designed to solve the problem that the existing device cannot directly filter high-temperature dust-laden flue gas. The flue gas dedusting device comprises a housing, a tubesheet, a heat exchange element, a temperature thermocouple and a ceramic filter structure, wherein the housing is divided into a dust chamber and a gas purification chamber by the tubesheet; the heat exchange element and the temperature thermocouple are located in the dust chamber; a plurality of through holes are formed in the tubesheet; at least a part of the ceramic filter structure is mounted in the through holes; a flue gas inlet and a flue gas outlet are formed in the two sides of the housing respectively; the flue gas inlet is communicated with the dust chamber; and the flue gas outlet is communicated with the gas purification chamber. The flue gas dedusting device can directly filter the high-temperature dust-laden flue gas, and reduce blocking, abrasion and corrosion problems of devices such as a denitration device and an air preheater; a service life of the ceramic filter structure can be prolonged; and the operation and maintenance cost of equipment can be lowered.

Description

technical field [0001] The invention relates to the technical field of flue gas dust removal and purification equipment, in particular to a flue gas dust removal device. Background technique [0002] Metallurgy, electric power, building materials and other industrial kilns will emit a large amount of dusty fume during production, which will not only have a huge impact on air quality and visibility, but also the fine particles in it will cause great damage to the respiratory system, seriously threatening people's health. healthy. Therefore, the purification and dust removal of flue gas has become a necessary measure in industrial production. [0003] Due to its high temperature, the high-temperature dusty flue gas poses a huge challenge to the performance of the dust removal device. At present, there are two kinds of dust removal equipment: the first type of dust removal equipment is to cool the flue gas first, and then use the bag filter or electrostatic precipitator to pr...

Claims

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Application Information

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IPC IPC(8): B01D46/00B01D46/54B01D46/44B01D46/48B01D46/42
CPCB01D46/00B01D46/4218B01D46/448B01D46/48B01D46/543B01D2258/0283
Inventor 刘开琪张会军任小勇陈运法
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI