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White desulfurization tail smoke eliminating technology and device

A tail smoke and process technology, applied in the direction of gas treatment, dispersed particle separation, membrane technology, etc., can solve the problems of easy corrosion of condensation pipes, many condensation pipe bundles, and large amount of cold sources, so as to ensure long-term stable operation and sufficient external effects , the effect of small amount of cooling water

Inactive Publication Date: 2018-07-24
ZHEJIANG TIANLAN ENVIRONMENTAL PROTECTION TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method requires a large number of condenser tube bundles, a large amount of cold source and high energy consumption, and the condenser tubes are easy to corrode

Method used

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  • White desulfurization tail smoke eliminating technology and device
  • White desulfurization tail smoke eliminating technology and device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] In an engineering test, the ambient temperature is 25°C, the relative humidity is 39%, and the primary air intake volume is 23162Nm 3 / h, the temperature of flue gas is 49.7°C, the moisture content of flue gas is 11.6%, and the flow rate of flue gas is 11.6%. Using the process of the present invention, a circular uniformly distributed cooling device is used to eliminate white smoke. Working condition 1: circulating water volume 20m 3 / h, the inlet water temperature is 38.2°C, the outlet water temperature is 44.5°C, the outlet flue gas temperature is 42.0°C, and the white smoke is significantly reduced; working condition 2: circulating water volume 40m 3 / h, the inlet water temperature is 38.2°C, the outlet water temperature is 42.3°C, the outlet flue gas temperature is 40.7°C, and there is only a slight white smoke at the chimney outlet; working condition 3: circulating water volume 60m 3 / h, the inlet water temperature is 38.2°C, the outlet water temperature is 39.8°C...

Embodiment 2

[0044] In an engineering test, the ambient temperature is 29°C, the relative humidity is 42%, and the primary air intake volume is 335482Nm 3 / h, the temperature of flue gas is 53.7°C, the moisture content of flue gas is 12.4%, and the flow rate of flue gas is 12.4%. Using the process of the present invention, a rhombus uniform cooling device is used to eliminate white smoke. Working condition 1: circulating water volume 30m 3 / h, the inlet water temperature is 38°C, the outlet water temperature is 44.2°C, the outlet flue gas temperature is 42.0°C, and the white smoke is significantly reduced; working condition 2: circulating water volume 60m 3 / h, the inlet water temperature is 38°C, the outlet water temperature is 43°C, the outlet flue gas temperature is 40.4°C, and there is no white smoke.

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Abstract

The invention discloses a white desulfurization tail smoke eliminating technology and a white desulfurization tail smoke eliminating device. The white desulfurization tail smoke eliminating device comprises a tower body, wherein gas enters from the bottom of the tower body and is discharged from the top of the tower body; a uniformly-distribution cooling device, an ultrafine atomizing sprinkling device, a cyclone defogger and an ultrafine liquid droplet trapping packing layer are sequentially arranged inside the tower body in the flow direction of flue gas; bottom water collecting pipes of thecyclone defogger and the ultrafine liquid droplet trapping packing layer are externally connected with a condensed water storage tank; the outlet water of the condensed water storage tank is connected to an air cooling tower; the outlet water of the air cooling tower is connected into the ultrafine atomizing sprinkling device. Desulfurization tail smoke enters the tower body from the bottom of the tower body, more than 60% of water vapor in the flue gas is condensed after two interactions with cold water droplets, and finally the dried flue gas is discharged into the atmosphere; hot water collected by the cyclone defogger and the ultrafine liquid droplet trapping packing layer is sent into the condensed water storage tank and stored, and a part of the stored water is sent into the air cooling tower, cooled by the air cooling tower and then sprinkled into the tower body by the ultrafine atomizing sprinkling device, so that the water vapor content of the flue gas is reduced and the purpose of eliminating white smoke is achieved.

Description

technical field [0001] The invention relates to the technical field of flue gas treatment of coal-fired boilers, in particular to a technology and device for eliminating white and dust from desulfurization tail smoke of coal-fired boilers. Background technique [0002] At this stage, wet desulfurization accounts for more than 90% of the flue gas desulfurization devices that have been put into operation. The flue gas after wet desulfurization has a high moisture content (12-15%) and low flue temperature (50-55°C). but also contains SO 2 , NO X , Condensable ultrafine dust particles, liquid water and its dissolved salts, gaseous water, etc., among which ultrafine dust particles and dissolved salts form aerosols in the air (one of the causes of smog). When the flue gas enters the ambient air, due to the low temperature and limited lift height, it is not conducive to the diffusion of pollutants, resulting in the enrichment of pollutants in the area near the emission source, an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/26
CPCB01D53/26B01D53/265B01D2258/0283
Inventor 陈美秀刘学炎王岳军莫建松李泽清
Owner ZHEJIANG TIANLAN ENVIRONMENTAL PROTECTION TECH
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