Wet desulfurization flue gas treatment system and treatment method

Abstract

The invention discloses a wet desulfurization flue gas treatment system and treatment method, and aims at overcoming the defects that at present, the white smoke phenomenon is prone to be formed when desulfurization flue gas is treated and then exhausted to the atmosphere through a chimney, and electric power consumption and investment and operation cost in wet electrostatic precipitation are high. The wet desulfurization flue gas treatment system comprises an electrostatic precipitator, a wet desulfurization tower, a wet phase change condensation precipitator and a chimney which are sequentially arranged in the flow direction of the flue gas; an induced draft fan is installed between the electrostatic precipitator and the wet desulfurization tower, and a liquid outlet is formed in the lower end of the wet phase change condensation precipitator and connected to the wet desulfurization tower through a pipeline; a condensation pipe is arranged in the wet phase change condensation precipitator, a cyclic liquid inlet pipe is connected to one end of the condensation pipe, and a cyclic liquid outlet pipe is connected to the other end of the condensation pipe. Accordingly, the white smoke phenomenon is not prone to be formed when the desulfurization flue gas is treated and then exhausted to the atmosphere through the chimney, the whole treatment system is low in power consumption, the investment and operation cost is reduced, and the treatment system can effectively recycle industrial water.

Description

technical field [0001] The invention relates to a flue gas treatment technology, more specifically, it relates to an efficient wet desulfurization flue gas treatment system and treatment method. Background technique [0002] Fuel combustion in boilers and various furnaces will produce a large amount of flue gas carrying dust, sulfur dioxide, and nitrogen oxides. In order to achieve clean and up-to-standard emissions, SCR denitrification is generally used for nitrogen oxides, and electrostatic, cloth bag and other dust removal are used for dust. Sulfur dioxide is treated by wet desulfurization. When the high-temperature sulfur-containing flue gas enters the wet desulfurization absorption tower, it reacts with the absorbent slurry and releases a large amount of heat. At the same time, it is cooled by the absorbent slurry to about 50 degrees Celsius. After the gas is discharged into the atmosphere through the chimney, a "white smoke" phenomenon is formed. At the same time, the...

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Problems solved by technology

[0004] The invention overcomes the disadvantages of the existing desulfurization flue gas that is easily discharged into the atmosphere through the chimney to form "white smoke", and at the same time, the wet electrostatic precipitator consumes a large amount of electric power, and has high investment and operating costs, and provides a wet desulfurization flue gas Gas treatment system and treatment method. After desulfurization flue gas is discharged into the atmosphere through the chimney, it is not easy to form "white smoke", and the power consumption of the whole system is low, which reduces investment and operation costs. The treatment system can effectively recover industrial water.

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