Method for performing synchronous desulfurization, denitrification and dust removal in bag type dust collector

A bag filter, desulfurization and denitrification technology, applied in chemical instruments and methods, separation methods, dispersed particle separation, etc., can solve problems such as reducing the concentration of soot, and achieve the effects of reducing load, reducing the content of soot, and reducing treatment costs.

Active Publication Date: 2014-12-10
HEFEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] Aiming at the problems existing in the comprehensive treatment of flue gas pollution, the present invention invents a method for synchronous desulfurization, denit

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  • Method for performing synchronous desulfurization, denitrification and dust removal in bag type dust collector
  • Method for performing synchronous desulfurization, denitrification and dust removal in bag type dust collector

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Embodiment 1

[0051] Such as figure 1 and figure 2 As shown, this embodiment illustrates the method for synchronous desulfurization, denitrification and dust removal in the bag filter of the present invention, and the specific steps are:

[0052] a. The coal-fired flue gas produced by burning coal powder is passed through an electric precipitator to remove most of the dust, and the sulfur content in the flue gas is about 550PPm;

[0053] b. Adjust the temperature of coal-fired flue gas after electrostatic precipitator to keep it stable at 200-210°C; in this way, the temperature of coal-fired flue gas entering the bag filter can be stabilized at 200-210°C. The temperature requirements of ammonia reduction flue gas denitrification also meet the requirements of safety and service life of filter bags.

[0054] c. Inject industrial manganese dioxide powder into the connecting pipe between the electrostatic precipitator and the bag filter, so that the manganese oxide can quickly react with the...

Embodiment 2

[0063] a. Coal-fired flue gas passes through the electrostatic precipitator to remove most of the dust, and the sulfur content in the flue gas is about 550PPm;

[0064] b. Adjust the temperature of coal-fired flue gas after electrostatic precipitator to keep it stable at 150-160°C;

[0065] c. Inject natural high-grade manganese oxide ore powder into the connecting pipe between the electrostatic precipitator and the bag filter, so that the manganese oxide can quickly react with the sulfur dioxide in the coal-fired flue gas, and remove large amounts of coal-fired flue gas. Part of the sulfur dioxide forms manganese sulfate, and reacts with part of the nitrogen oxides in the coal-fired flue gas, and the nitrogen oxides are removed to form manganese nitrate; manganese sulfate, manganese nitrate, unreacted manganese oxides and soot enter with the coal-fired flue gas In the filter bag of the bag filter, it is trapped on the surface of the filter bag to form a filter layer, and the ...

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Abstract

The invention discloses a method for performing synchronous desulfurization, denitrification and dust removal in a bag type dust collector. The method is characterized by comprising the following steps: by taking the bag type dust collector as a reaction device, introducing coal-fired flue gas subjected to electric precipitation into the bag type dust collector through a connecting pipeline, and injecting manganese oxides into the connecting pipeline, so that the manganese oxides are used for performing desulfurization and denitrification on the coal-fired flue gas; allowing the unreacted manganese oxides, desulfurization and denitrification products and smoke dust to enter a filter bag of the bag type dust collector along with the coal-fired flue gas, and retaining the unreacted manganese oxides, desulfurization and denitrification products and smoke dust on the surface of the filter bag to form a filter layer; spraying ammonia gas into the coal-fired flue gas entering the bag type dust collector, and thus reducing the residual nitric oxides in the coal-fired flue gas into nitrogen by virtue of the ammonia gas; recovering and regenerating the materials on the filter layer, and recycling the obtained manganese oxides to be injected into the connecting pipeline. According to the invention, the bag type dust collector serves as a core device, the manganese oxides are taken as active materials, and synchronous and integrated desulfurization, denitrification and dust removal on the flue gas can be realized in the bag type dust collector through a series of separation, regeneration and recycling operations.

Description

1. Technical field [0001] The invention relates to the field of air pollution control, in particular to a method for synchronous desulfurization, denitrification and dust removal of flue gas. 2. Background technology [0002] Thermal power plants produce a large amount of SO in the process of high temperature combustion 2 , NO x , soot and other pollutants, nitrogen oxides in the air are the main source of fine particulate matter PM2.5, and thermal power plants are the largest emitters of nitrogen oxides. Therefore, it is imperative to denitrify power plants and reduce PM2.5 concentration without delay. Nitrogen oxides can also cause regional environmental pollution problems such as photochemical smog and ozone layer depletion. Thanks to SO 2 , NO x Emissions have caused acid rain in 81.6% of cities across the country, and increased severe weather such as smog across the country, which has seriously affected industrial and agricultural production, people's lives, and hu...

Claims

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Application Information

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IPC IPC(8): B01D50/00B01D53/81B01D53/76B01D53/60B01D53/96
Inventor 陈天虎张萍刘海波朱承驻谢晶晶何宏平袁鹏
Owner HEFEI UNIV OF TECH
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