Set system for removing PM 2.5 by wet method and recovering waste heat

Abstract

The invention relates to the technical field of energy-saving and environmental protection and particularly relates to a set system for removing PM 2.5 by a wet method and recovering waste heat. The system comprises an exhaust gas cooler, a water vapor phase change coagulation chamber, an electric precipitator, a desulfurization tower, an exhaust gas reheater, an induced draft fan and a chimney and the above parts are arranged in series from front to back in a technical order. The exhaust gas cooler is provided with an exhaust gas inlet. A heat exchanger is arranged in the exhaust gas cooler.The electric precipitator is a vertical cone-shaped electric precipitator. Through the combination of the vertical cone-shaped electrostatic precipitator and a swirling-type coagulation device, the probability of particle collision is coagulation increased, the residence time of the dust particles is increased, and more dust is adsorbed onto a dust collecting pole plate so that the dust removal effect is further improved and secondary dusting is effectively prevented, the size of the electric precipitator is reduced, and the economy is better.

Description

technical field [0001] The invention relates to the technical field of energy saving and environmental protection, in particular to a complete system for wet removal of PM2.5 and recovery of waste heat. Background technique [0002] There is a large amount of SO in the waste gas produced by industries such as petroleum, chemical industry, steel, electric power, and building materials. X , NO X , inhalable particulate matter (PM10), especially fine particulate matter (PM2.5), etc., seriously affect human life and production. Air pollution is becoming more and more serious, and pollution control is an urgent task. Making full use of the waste heat in the exhaust gas and removing fine particles in the exhaust gas are the main tasks of enterprises to save energy and reduce emissions. The number concentration of fine particles in the dust, especially those below PM10, can reach 99% of the total number concentration. However, most of the current dust collectors are not efficient...

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is: In order to solve the general technical problem of industrial waste gas dedusting effect in the prior art, the present invention provides a complete system for wet removal of PM2. Provide steam for the water vapor phase change condensing chamber, and the other part enters the exhaust gas reheater; the fine particles are condensed and grow up through the phase change, and the larger particles are settled into the sewage tank, and the electrostatic precipitator is used to further remove the smaller particles. small fine particles

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