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Streamer discharge ammonia flue gas desulfurization, denitrification and fog removal integrated method

A streamer discharge, desulfurization and denitrification technology, applied in chemical instruments and methods, separation methods, air quality improvement and other directions, can solve the problems of serious emission of acid mist and aerosol in tail gas, affecting the popularization and application of ammonia desulfurization, and entrainment of ammonium salt in tail gas. , to achieve the effect of reducing ammonium salt entrainment, high demisting efficiency, and inhibiting ammonia escape

Inactive Publication Date: 2011-12-14
GUANGDONG J TECH ENVIRONMENT SCI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are some main problems in the actual operation of conventional ammonia desulfurization, mainly including: (1) single desulfurization, no denitrification function; (2) potential tail gas ammonia escape problem; (3) tail gas ammonium salt entrainment; (4) tail gas acid mist and Serious aerosol emission; (5) easy to block
These problems even affect the popularization and application of ammonia desulfurization

Method used

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  • Streamer discharge ammonia flue gas desulfurization, denitrification and fog removal integrated method
  • Streamer discharge ammonia flue gas desulfurization, denitrification and fog removal integrated method
  • Streamer discharge ammonia flue gas desulfurization, denitrification and fog removal integrated method

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Embodiment 1

[0050] refer to figure 1 , an integrated method for flue gas desulfurization, denitrification and demisting by streamer discharge ammonia method, comprising the following steps:

[0051] 1) The flue gas produced by the coal-fired boiler is dusted by the electrostatic precipitator, so that the dust concentration reaches 50mg / m 3 the following;

[0052] 2) After the dust is removed, the flue gas is sent into the streamer discharge denitrification reactor 1 through the fan. The streamer discharge denitrification reactor 1 is equipped with an alternate ground electrode 101 and a discharge electrode 102. The discharge electrode is discharged by a positive electrode, and the distance between the two electrodes is 30~100mm. The applied DC voltage is 10~50kV, and a streamer corona discharge is generated under high voltage, and the generated plasma radicals oxidize NO in the flue gas to NO 2 and other substances that are easy to absorb by wet method;

[0053] 3) The flue gas passing...

Embodiment 2

[0058] refer to figure 2 , an integrated method for flue gas desulfurization, denitrification and demisting by streamer discharge ammonia method, comprising the following steps:

[0059] 1) The flue gas produced by the coal-fired boiler is dedusted by the bag filter to make the soot concentration reach 50mg / m 3 the following;

[0060] 2) After the dust is removed, the flue gas is sent to the streamer discharge denitrification reactor 1 through the fan. The streamer discharge denitrification reactor 1 is equipped with an alternate ground electrode 101 and a discharge electrode 102. The discharge electrode adopts a positive electrode for discharge, and the distance between the two electrodes is 150~300mm. The applied DC voltage is 110~120kV, and a streamer corona discharge is generated under high voltage, and the generated plasma radicals oxidize NO in the flue gas to NO 2 and other substances that are easy to absorb by wet method;

[0061] 3) The flue gas passing through th...

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Abstract

The invention discloses an integrated method for flue gas desulfurization, denitrification and demisting by streamer discharge ammonia method, which comprises the following steps: 1) boiler flue gas containing sulfur dioxide and nitrogen oxides is sent to streamer discharge denitrification reactor after dedusting; 2) The flue gas after the streamer discharge denitrification reactor enters the desulfurization tower and is discharged from the top outlet of the desulfurization tower; 3) The flue gas from the top outlet of the desulfurization tower is demisted and purified by the electric demister and sent to the chimney for discharge. The method of the present invention simultaneously desulfurizes and denitrates, has high demisting efficiency, effectively suppresses ammonia escape, eliminates ammonium salt entrainment, reduces ammonia loss, reduces exhaust smoke turbidity at the outlet, reduces corrosion to tail flue and chimney, and produces nitrogen fertilizer by-product.

Description

technical field [0001] The invention relates to an integrated method for streamer discharge ammonia flue gas desulfurization, denitrification and demisting. Background technique [0002] Coal-fired power plants or boiler flue gas mainly contain soot, sulfur dioxide, SO 2 , Nitrogen oxide NO x , mercury Hg and its compounds and other pollutants, the main task of flue gas purification is flue gas desulfurization in the early stage. With the continuous improvement of environmental protection standards, higher requirements are put forward for the emission of nitrogen oxides and heavy metal mercury. The requirements for denitrification and mercury removal technology are also getting higher and higher. [0003] Ammonia desulfurization technology is widely used in the chemical industry, using NH 3 Absorb SO in sulfuric acid or smelting tail gas 2 , Sulfur resources can be recovered. Among them, the amino acid method can produce SO 2 Acid production, ammonia fertilizer method ...

Claims

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Application Information

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IPC IPC(8): B01D53/76B01D53/78B01D53/60C05C3/00
CPCY02A50/20
Inventor 刘勇胡小吐
Owner GUANGDONG J TECH ENVIRONMENT SCI CO LTD
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