Environmental protection technology for coal-fired tail gas treatment

A tail gas treatment, coal-fired flue gas technology, applied in the direction of gas treatment, membrane technology, dispersed particle separation, etc., can solve the problems of high equipment investment costs and operating costs, without solving the problems of limestone-gypsum method and low dissolving capacity of limestone, etc. Achieve the effects of improving the regional ecological environment, stable and efficient processing performance, and low operating costs

Inactive Publication Date: 2019-04-23
杨珊珊
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] From the technical point of view, coal-fired flue gas desulfurization methods can be roughly divided into three categories: dry method, semi-dry method, and wet method. The wet method of coal-fired flue gas desulfurization processes include: seawater method, double alkali method, limestone-gypsum In the limestone-gypsum method, because the dissolving power of limestone is very low, sometimes some additives need to be added, which does not solve the above-mentioned shortcomings of the limestone-gypsum method, and also increases the operating cost, while other treatment processes involve a large number of equipment, Large-scale equipment, high equipment investment costs and high operating costs, etc.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0026] The mass percentage is 81% red mud, copper 2%, nickel 3%, platinum 5%, titanium 4%, palladium 3%, rhodium 2%, and the catalyst is prepared from the bottom 40cm, top 60cm and middle of the coal chimney Install a packing layer with a height of 30cm, load the catalyst on it, and set two pipes at the bottom of the chimney, one pipe is connected to the coal-fired flue gas, and the other pipe is connected to the waste gas discharged from the aeration high-concentration ammonia-nitrogen wastewater. Coal-fired flue gas containing nitrogen dioxide and ammonia-containing gas are fully contacted under the action of the catalyst for rapid reaction to generate non-toxic nitrogen and sulfur. The detected sulfur concentration after treatment is 0.08mg / m3.

example 2

[0028] The mass percentage is 85% red mud, copper 2%, nickel 1%, platinum 4%, titanium 2%, palladium 3%, rhodium 3%, and the catalyst is prepared from the bottom 40cm, top 60cm and middle of the coal chimney Install packing layers with a height of 35cm respectively, and load the catalyst on them. There are two pipes at the bottom of the chimney, one pipe is connected to the coal-burning flue gas, and the other pipe is connected to the waste gas discharged from the aerated high-concentration ammonia-nitrogen wastewater. Coal-fired flue gas containing nitrogen dioxide and ammonia-containing gas are fully contacted under the action of the catalyst for rapid reaction to generate non-toxic nitrogen and sulfur. The detected sulfur concentration after treatment is 0.05mg / m3.

example 3

[0030] The mass percentage is red mud 83%, copper 3%, nickel 1%, platinum 6%, titanium 3%, palladium 3%, rhodium 1%, and the catalyst is prepared from the bottom 40cm, top 60cm and middle of the coal chimney The packing layer with a height of 42cm is installed respectively, and the catalyst is loaded on it. There are two pipes at the bottom of the chimney, one pipe is connected to the coal-fired flue gas, and the other pipe is connected to the waste gas discharged from the aeration high-concentration ammonia nitrogen wastewater. The coal-burning flue gas containing nitrogen dioxide and the ammonia-containing gas are fully contacted under the action of the catalyst for a rapid reaction to generate non-toxic nitrogen and sulfur, and no sulfur is detected after treatment.

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Abstract

The invention discloses an environmental protection technology for coal-fired tail gas treatment. The desulfurization method comprises: (1) respectively installing a filler layer with a height of 30-50 cm at the position, 40 cm away from the bottom portion, of a coal-fired chimney, the position, 60 cm away from the top portion, of the coal-fired chimney, and the middle portion of the coal-fired chimney; (2) arranging two pipelines at the bottom portion of the chimney, wherein one pipeline is connected to coal-fired flue gas, and the other pipeline is connected to waste gas discharged from high-concentration ammonia-nitrogen wastewater aeration; and (3) carrying out a rapid reaction on the coal-fired flue gas containing sulfur dioxide and ammonia-containing gas under the action of a catalyst to produce non-toxic nitrogen and sulfur. According to the present invention, the method has advantages of simple operation, stable and high treatment performance, low operating cost, no secondary pollution and environmental protection, treats ammonia gas discharged from high-concentration ammonia-nitrogen wastewater while achieves desulfurization, and can treat waste gas with waste gas and turnwaste gas into treasure.

Description

technical field [0001] The invention relates to an environmental protection technology applied to the treatment of coal-burning tail gas, in particular to a method for removing sulfur-containing compounds in coal-burning waste gas, and belongs to the technical field of air pollution prevention and treatment. Background technique [0002] my country is a big coal country, and coal is the most important energy source in our country. Air pollution is a typical soot-type pollution, and the pollution is serious. The main pollutant is sulfur dioxide produced by coal burning, and its harm is mainly the formation of acid rain. In addition, sulfur dioxide in the environment can lead to a decline in children's immune function, and an increase in the prevalence of respiratory and eye diseases among the general public. Sulfur dioxide emissions are mainly from coal-fired thermal power plants, small and medium-sized coal-fired industrial boilers and other industrial and civil facilities. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/86B01D53/60B01D53/76
CPCB01D53/8637B01D2251/2062B01D2258/0283B01D2259/122
Inventor 杨珊珊
Owner 杨珊珊
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