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Method for comprehensively treating sulfur-containing flue gas and solid waste abraum salt

A comprehensive treatment, flue gas technology, applied in the direction of chemical instruments and methods, sulfate/bisulfate preparation, inorganic chemistry, etc., can solve the problems of increasing the cost of pollutant treatment, increasing the difficulty of environmental protection treatment and disposal, etc. The effects of sustainable development, realization of resource utilization, and reduction of environmental pollution

Inactive Publication Date: 2017-05-17
科莱环保(北京)有限公司
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Problems solved by technology

[0003] Water and air slag pollution usually exists at the same time in chemical industry parks, but the current status of environmental protection management of water and air slag is basically "independent". When pollutants transform from one form to another, it not only increases the cost of pollutant treatment, but also increases Reduced the difficulty of environmental protection treatment and disposal

Method used

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  • Method for comprehensively treating sulfur-containing flue gas and solid waste abraum salt
  • Method for comprehensively treating sulfur-containing flue gas and solid waste abraum salt

Examples

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Embodiment 1

[0046] flue gas SO 2 The content is 1%, and the flue gas desulfurization is carried out by using the method described in the present invention, the pH of the washing liquid in the pre-scrubber is 1, the mass percentage of organic amine in the lean amine liquid is 30%, and the absorption temperature of the lean amine liquid is 45°C , the steam temperature of the steam in the regeneration tower is 110°C, the pressure in the regeneration tower is 0.16MPa, and 4% of the regenerated lean amine solution in each absorption cycle enters the amine liquid purification device for purification, SO 2 The removal rate is 99%, and the residual SO in the tail gas 2 The content is 28.57mg / m 3 . The temperature of the catalyst bed is 400°C, the absorbent is 94% sulfuric acid, and the concentration of the produced sulfuric acid is 96%. Add 2.18 tons of solid waste miscellaneous salts to the glass-lined reactor with stirrer, thermal resistance, pressure gauge, liquid level gauge, etc., and slo...

Embodiment 2

[0048] flue gas SO 2 The content is 3.5%, and the flue gas desulfurization is carried out by using the method described in the present invention, the pH of the washing liquid in the pre-scrubber is 2, the mass percentage of organic amine in the lean amine liquid is 25%, and the absorption temperature of the lean amine liquid is 40°C , the steam temperature of the steam in the regeneration tower is 120°C, the pressure in the regeneration tower is 0.18MPa, and 5% of the regenerated lean amine solution in each absorption cycle enters the amine liquid purification device for purification, SO 2 The removal rate is 96%, and the residual SO in the tail gas 2 The content is 20.35mg / m 3 . The temperature of the catalyst bed is 500°C, the absorbent is 95% sulfuric acid, and the concentration of the produced sulfuric acid is 97%. Add 2.18 tons of solid waste miscellaneous salts to the glass-lined reactor with stirrer, thermal resistance, pressure gauge, liquid level gauge, etc., and s...

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Abstract

The invention discloses a method for comprehensively treating sulfur-containing flue gas and solid waste abraum salt. According to the method, hydrogen chloride and sodium hydrogen sulfate crystals are produced through reaction of sulfuric acid prepared by virtue of flue gas desulfurization and solid waste abraum salt prepared from industrial wastewater by virtue of evaporative crystallization. The method comprises two stages, wherein the first stage is a flue gas desulfurization acid preparation stage, and the second stage is a reaction stage of solid waste abraum salt and solid waste abraum salt. The flue gas desulfurization acid preparation and the wastewater zero-discharging solid waste abraum salt are combined together in a resource manner, so that the linkage treatment of water-gas residue pollutants is realized, the spot utilization of acid prepared though flue gas desulfurization is realized, the transportation cost is saved, the added value of the solid waste abraum salt is increased, the resource utilization of waste is realized, the true zero-discharging closed loop is formed, and sustainable development requirements are met.

Description

technical field [0001] The invention belongs to the technical field of resource recovery and treatment, and specifically relates to a method for producing hydrogen chloride and sodium bisulfate crystals by reacting sulfuric acid obtained from flue gas desulfurization and solid waste miscellaneous salt obtained by evaporation and crystallization of industrial wastewater. Background technique [0002] The existing environmental protection treatment methods can separately treat the sulfur-containing flue gas and high-concentration salt wastewater of chemical plants. After the sulfur-containing flue gas is treated, the pollutants are transferred from the flue gas to the desulfurization wastewater or solid waste, and are output in the form of wastewater or gypsum; the chemical high-concentration brine can crystallize the pollutants dissolved in the wastewater through evaporation crystallization and other processes out as solid waste. The above treatment methods all belong to the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B7/03C01D5/02
CPCC01B7/035C01D5/02
Inventor 李素青雷传豹
Owner 科莱环保(北京)有限公司
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