Integrated system for efficiently and synergistically removing multiple pollutants

Abstract

The invention relates to an integrated system for efficiently and synergistically removing multiple pollutants. The integrated system reduces discharge values of smoke, SO2, NOx, mercury, SO3 and other main smoke pollutants to achieve the discharge standard of a fuel gas unit. According to the technical scheme, the system comprises an SCR reactor, low-temperature dust removing equipment, a desulfurizing absorption tower and a wet-type electrostatic dust collector, wherein the inlet of the SCR reactor is connected with a smoke outlet through a tail smoke channel of a boiler improved through low-nitrogen combustion, and SCR denitration catalysts are modified catalysts capable of improving oxidation susceptibility of zero-valent mercury; the inlet of the low-temperature dust removing equipment is connected with the outlet of the SCR reactor to be used for removing dust and SO3; the inlet of the desulfurizing absorption tower is connected with the outlet of the low-temperature dust removing equipment to be used for desulfuration and dust removal; the inlet of the wet-type electrostatic dust collector is connected with the outlet of the desulfurizing absorption tower, and the outlet of the wet-type electrostatic dust collector is connected to a chimney through warming equipment to be used for removing the dust, gypsum fogdrops, the mercury and SO3. The integrated system is used for the technical field of atmospheric pollution prevention.

Description

technical field [0001] The invention relates to an integrated system for efficient and coordinated removal of various pollutants, and is mainly applicable to the technical field of air pollution prevention and control. Background technique [0002] There are triple pressures in my country's current energy situation, namely, the pressure of continuous growth in energy demand, the pressure of continuously increasing environmental protection requirements in energy utilization, and the pressure of energy supply security. How to find a balance point among these triple pressures and jointly solve them reasonably and appropriately The problem is a very urgent and necessary work. [0003] my country's coal-based energy consumption structure will hardly change fundamentally for a long period of time in the future. During the combustion of coal, a large amount of soot, sulfur dioxide (SO 2 ), nitrogen oxides (NO X ) and heavy metals, as well as fine particulate matter (PM 2 . 5 ) ...

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Problems solved by technology

[0005] Dust removal, SO 2 , NO X and other main flue gas pollutants and the H mentioned in the new standard g In addition, SO3, a pollutant with a small concentration, has also attracted widespread attention. 3 It is extremely corrosive, which not only pollutes the environment, but also brings great hidden dangers to the safe operation of power plants. SO in the flue gas emissions of coal-fired power plants 3 Although the concentration is low, the absolute amount of emission is relatively large, which cannot be ignored. The United States has issued relevant emission standards, and the strictest state standard is 0.6mg / Nm 3 , but there is still no relevant standard in our country

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