Coke oven flue gas desulfurization, dust removal and denitrification integrated system

A denitrification catalyst and denitrification technology, applied in chemical instruments and methods, dispersed particle filtration, dispersed particle separation, etc., can solve problems such as wear of alkali metal, catalyst blockage, complex composition, etc., to achieve safe operation, prolong service life, temperature field evenly distributed effect

Pending Publication Date: 2018-05-18
上海电气集团国控环球工程有限公司
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Problems solved by technology

The dust in the coking flue gas is mainly coal dust and coke dust, which are high in content and complex in composition. If the high dust arrangement is ado

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  • Coke oven flue gas desulfurization, dust removal and denitrification integrated system
  • Coke oven flue gas desulfurization, dust removal and denitrification integrated system

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Embodiment Construction

[0040] The present invention is illustrated in conjunction with the following examples.

[0041] An integrated system for desulfurization, dust removal and denitrification of coke oven flue gas, comprising a rotary spray drying unit and a dust removal and denitrification unit. The raw flue gas is desulfurized by rotary spray semi-dry method in the rotary spray drying unit to obtain desulfurized flue gas. The desulfurized flue gas enters the dust removal and denitrification unit for bag dust removal, and then performs selective catalytic reduction and denitrification to obtain exhaust gas that meets the emission standards.

[0042] The dust removal and denitrification unit includes: an integrated dust removal and denitrification device and an ammonia injection device. The dust removal and denitrification integrated device integrates the bag dust removal process and the selective catalytic reduction denitrification process; the desulfurization flue gas enters the dust removal Th...

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Abstract

The invention belongs to the technical field of environmental protection for flue gas purification and resource utilization and particularly relates to a coke oven flue gas desulfurization, dust removal and denitrification integrated system. The system has a wide application range, high safety and reliability, strong feasibility, high desulfurization and denitrification efficiency, low ammonia slip rate, no waste liquid emission, a high heat utilization rate and low operating cost. The desulfurization, dust removal and denitrification integrated system realizes integration of a bag dedusting technology and a selective catalytic reduction denitrification technology. The desulfurized flue gas enters the dust removal and denitrification integrated system, is subjected to bag dedusting and then is fully mixed with ammonia fed through an ammonia injection device, and the mixed flue gas enters a denitrification catalyst layer and undergoes a denitrification reaction under the action of the denitrification catalyst so that NOX is removed. The system is widely used in the technical field of coke oven flue gas desulfurization and denitrification.

Description

technical field [0001] The invention belongs to the environmental protection technical field of flue gas purification and resource utilization, and in particular relates to an integrated system for desulfurization, dust removal and denitrification of coke oven flue gas. Background technique [0002] The air pollutants emitted by coke oven chimneys are the waste gas produced after the combustion of coke oven gas, mainly including SO2, NOx and soot. As the country pays more and more attention to air pollution control, the control of coke oven flue gas pollutants is imminent. According to the "Coking Chemical Industry Pollutant Discharge Standard (GB16171-2012)", from January 1, 2015, the existing coking enterprises need to implement a particle concentration of 30mg / m 3 , sulfur dioxide 50mg / m 3 , nitrogen oxides 500mg / m 3 According to this standard, only a few enterprises can meet the emission limit value. Usually after desulfurization and dust removal, particulate matter ...

Claims

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Application Information

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IPC IPC(8): B01D53/80B01D53/50B01D53/90B01D53/56B01D46/02
CPCB01D46/02B01D53/504B01D53/8631B01D53/90B01D2251/404B01D2251/2062
Inventor 杨文明张红兵张小军
Owner 上海电气集团国控环球工程有限公司
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