Combined method for recycling flue gas desulfurization and fuel gas deamination pollutants and treating waste by using waste

A technology for treating waste and pollutants with waste, applied in the direction of chemical instruments and methods, separation methods, educts, etc., can solve problems such as secondary pollution with negative benefits, and achieve reliable operation, mature technology, and low operating costs

Inactive Publication Date: 2019-03-05
程相魁
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The invention overcomes the problems of negative benefits and secondary pollution of flue gas desulfurization and gas deamination, and develops two combined processes of flue gas desulfurization and gas deamination according to the market demand of end products and different resource conditions of manufacturers. , A new process for recycling pollutants, using the concept of waste treatment to organically combine the two

Method used

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  • Combined method for recycling flue gas desulfurization and fuel gas deamination pollutants and treating waste by using waste
  • Combined method for recycling flue gas desulfurization and fuel gas deamination pollutants and treating waste by using waste

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Embodiment 1

[0088] This embodiment provides a combined method for recycling flue gas desulfurization and gas deammoniation pollutants to waste treatment, including the following steps:

[0089] (1) Pass the sulfur dioxide-containing flue gas and oxidizing air to be treated from the bottom of the desulfurization oxidation tower and go up at a low speed, and fully react with the magnesium hydroxide emulsion sprayed on the top of the tower in an oxidizing atmosphere to generate magnesium sulfite and calcium sulfite , and then oxidized to magnesium sulfate and calcium sulfate;

[0090] The magnesium hydroxide emulsion is obtained through hydrolysis and emulsification processing in an emulsification tank with magnesium oxide as a raw material;

[0091] (2) the reaction product obtained in step (1) is subjected to solid-liquid separation to obtain magnesium sulfate solution and a small amount of gypsum impurities;

[0092] (3) The magnesium sulfate solution obtained in step (2) is sent to the ...

Embodiment 2

[0097] This embodiment provides a combined method for resource utilization of flue gas desulfurization and gas deammoniation pollutants to waste treatment, specifically:

[0098] (1) Pass the sulfur dioxide-containing flue gas and oxidizing air to be treated from the bottom of the desulfurization oxidation tower and go up at a low speed, and fully react with the mixed emulsion of magnesium hydroxide and calcium carbonate sprayed on the top of the tower to generate magnesium sulfite and calcium sulfite , and then oxidized to magnesium sulfate and calcium sulfate;

[0099] The mixed emulsion of magnesium hydroxide and calcium carbonate is obtained by processing dolomite powder as raw material after hydrolysis and emulsification;

[0100] (2) carrying out solid-liquid separation with the easily water-soluble magnesium sulfate of step (1) gained reaction product and the insoluble calcium sulfate, obtain magnesium sulfate solution and powder calcium sulfate;

[0101] (3) The magne...

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Abstract

The invention discloses a combined method for recycling flue gas desulfurization and fuel gas deamination pollutants and treating waste by using waste, and the method is a process technology of low-cost high-efficiency resource utilization technology of harmful substances in gas. According to the method, magnesium oxide is used as a medium, hydrolyzed magnesium hydroxide absorbs SO2 in various flue gases to generate magnesium sulfite, the magnesium sulfite is oxidized to generate magnesium sulfate, and then the magnesium sulfate is used for removing ammonia in coke oven gas or other fuel gases. The method provided by the invention comprises two specific process routes; firstly, the magnesium hydroxide obtained by reduction regeneration can be recycled for removing SO2 in the flue gas again; and secondly, the high-purity magnesium hydroxide is sold as a product, and magnesium-containing minerals such as calcined dolomite, serpentine and the like can be used instead in regions lack of magnesium oxide resources. The process can be used to purify magnesium hydroxide, and benefits can be better. According to the method provided by the invention, material consumption for flue gas desulfurization and coal gas deamination can be reduced to the minimum simultaneously, and corrosivity of magnesium sulfate is far lower than corrosivity of dilute sulfuric acid, so that the service life ofequipment is greatly prolonged.

Description

technical field [0001] The invention relates to the technical field of environmental protection for recycling pollutants, in particular to a combined method for recycling pollutants from flue gas desulfurization and gas deammonization to waste treatment. Background technique [0002] Everyone understands the importance of environmental protection, but because most environmental protection processes produce negative benefits, many companies with weak legal awareness carry out environmental protection projects or operations for their own benefit, seriously affecting the living environment of the people. It can be seen that the most effective and ideal means to change this situation is to develop low-cost and high-efficiency resource utilization technology for pollutants, so that enterprises can reduce costs and increase efficiency to produce high benefits. [0003] About flue gas desulfurization: At present, about 90% of domestic desulfurization enterprises use calcium method ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01F5/00C01F5/20B01D53/75B01D53/58B01D53/50
CPCB01D53/501B01D53/58B01D53/75B01D2251/402B01D2251/604B01D2251/608B01D2258/0283C01F5/00C01F5/20Y02A50/20Y02P20/151
Inventor 程相魁
Owner 程相魁
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