Integrated treatment technology of smoke ultralow emission

Abstract

The invention discloses an integrated treatment technology of smoke ultralow emission. The technology comprises the following steps that a, smoke vertically and upwards flows through a flue and is guided, and the smoke horizontally flows, horizontally and downwards inclines by 7-15 degrees and enters the bottom of a desulfurization tower; 2, the smoke which enters the desulfurization tower moves from bottom to top and is subjected to desulfurization and dust removal through a boiling-type mass transfer component, wherein multiple rectification holes are evenly formed in the boiling-type mass transfer component; when the smoke runs through the rectification holes of the boiling-type mass transfer component, the smoke and serous fluid on the surface of the boiling-type mass transfer component take effect to form a boiling-type foam layer with the thickness of 100-500 mm, so that the gas-liquid contact area and turbulence intensity are increased. Various parameters are controlled and optimized, the emission concentration of coal-fired flue gas SO2 can be lower than 35 mg per normal cubic meter, the emission concentration of dust is lower than 5 mg per normal cubic meter, the liquid drop content of an outlet of a desulfurization device is lower than 20 mg per normal cubic meter, and the ultralow emission standard is achieved.

Description

technical field [0001] The invention relates to a desulfurization and dust removal process for a coal-fired power plant, in particular to an integrated treatment process for ultra-low emission of flue gas. Background technique [0002] At present, coal-fired power generation is still the main source of electricity in the world. At the same time, the gas emitted by coal-fired power generation is also one of the main sources of air pollution. Environmental protection devices such as desulfurization, denitrification and dust removal are basically necessary supporting devices for thermal power generating units. With the development of the economy and the improvement of environmental protection awareness, countries have higher and higher requirements for the emission of coal-fired power plants, which put forward higher and higher requirements for related environmental protection devices. [0003] Judging from the current state of technology, using corresponding desulfurization, d...

AI Technical Summary

Problems solved by technology

To meet the ultra-low emission requirements, high-sulfur coal units require the desulfurization efficiency of the desulfurization tower to reach more than 99%, and the total dust removal efficiency of environmental protection facilities to reach more than 99%. Conventional environmental protection facilities cannot meet the requirements

For ultra-low emission requirements, some power plants adopt wet electrostatic precipitator technology, which can meet the emission requirements of smoke dust less than 5 mg / standard cubic meter, but has disadvantages such as large initial investment, high operating cost, and large water consumption.

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