Technique and device for dry dedusting of wet dust-laden gas

A dry dust removal and wet dust technology, applied in the direction of removing smoke and dust, separation methods, chemical instruments and methods, etc., can solve problems such as sticking filter bags, blocking dust removal pipes, etc., and achieves low initial investment and operating costs, and strict emission standards. , the effect of easy promotion

Inactive Publication Date: 2010-07-21
ACRE COKING & REFRACTORY ENG CONSULTING CORP DALIAN MCC +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] The purpose of the present invention is to provide a dry dust removal process and device for wet dust gas, which can effectively solve the problem of sticking filter bags and blocking the dust removal pipeline due to condensation

Method used

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  • Technique and device for dry dedusting of wet dust-laden gas
  • Technique and device for dry dedusting of wet dust-laden gas

Examples

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specific example

[0023] The following is a specific example of dust removal at a single-belt wet quenching transfer station in a coking plant, described as follows:

[0024] known conditions:

[0025] 1 focal belt machine head at the transfer station, 2500m 3 / h (Temperature of dust in the suction hood is 50°C, measured value)

[0026] 1 feeding point of the coke belt machine at the transfer station, 3500m 3 / h (Temperature of dust in the suction hood is 50°C, measured value)

[0027] The wind speed at the mouth of the suction hood is 0.6~1m / s

[0028] The mass density of coke dust particles is 0.45~0.5t / m 3

[0029] The dust gas in the suction hood is saturated humid air at a temperature of 50°C, and its density ρ b =1.043kg / m 3 , moisture content d b =86.2g / kg dry air (d b =82.3g / m 3 Humid air), water vapor partial pressure P q.b =123.04(mbar)

[0030] The dust concentration of the dust gas in the suction hood is 2~3g / m 3

[0031] The average equivalent diameter o...

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Abstract

The invention relates to technique and a device for dry dedusting of wet dust-laden gas in coking field. The technique employs the method of introducing hot air to improve the dew-point temperature of the highly wet dust-laden gas, so that the temperature of the mixed wet dust-laden gas can be higher than the dew-point temperature of the wet dust-laden, or the temperature of the mixed wet dust-laden gas can be higher than the dew-point temperature of the supersaturated wet dust-laden gas after the supersaturated wet dust-laden gas totally vaporizes, and enough time (1-20s) is ensured to enable the water films and other unbonded liquid drops on the surfaces of the dust particles to vaporize again. The technique and the device have the advantages that the technique and the device can effectively solve the problems that the filter-bag is bonded and the dedusting pipeline is jammed due to moisture condensation; the technique and the device enable high-efficiency filter dust catchers to be effectively applied in dedusting systems for various high moisture-content dust-laden gases for a long time and can satisfy high emission standard; and meanwhile, the technique is simple, practical, low in initial investment and operating cost and easy to popularize.

Description

technical field [0001] The invention relates to a dry dust removal process and device for wet dust gas in the coking industry. Background technique [0002] At present, the dry coke quenching process is widely used in the coking plants of various iron and steel enterprises, and there are still quite a few wet coke quenching processes in independent coking plants and coke quenching production as backup for dry coke quenching. Due to the adhesion of filter bags, the blockage of dust removal pipes due to condensation, etc., the dust removal efficiency of wet coke quenching is low, and the emission concentration is ≤100mg / m 3 , although it meets the current national air pollutant comprehensive emission standard, the emission concentration is ≤120mg / m 3 requirements, but it can no longer meet the stricter emission standards set by large domestic and foreign enterprises (general factory requirements ≤50mg / m 3 , some factories require ≤20mg / m 3 ), and the use of high-efficiency ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D46/02B01D46/42B08B15/04
Inventor 刘庆成王充王满李志斌
Owner ACRE COKING & REFRACTORY ENG CONSULTING CORP DALIAN MCC
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