Comprehensive adsorption and desulphurization dedusting purification method of baking flue gas

Abstract

The invention discloses a comprehensive adsorption and desulphurization dedusting purification method of baking flue gas. The method comprises the processes of baking flue gas cooling, adsorption dedusting and cloth bag dedusting, and is characterized in that calcium hydroxide powder is fully mixed with and reacts with reversed high-flow velocity flue gas to carry out surface adsorption in order to remove harmful tar, HF, SO2, NOx and dusts in the flue gas; and obtained flue gas enters a cloth bag deduster to carry out gas-liquid separation and filtration, obtained flue gas is discharged by a chimney, and calcium hydroxide obtained after filtration is conveyed to a calcium hydroxide bin and is stored in the calcium hydroxidebin. The method has the advantages of simple process flow, simultaneous removal of various harmful substances in the flue gas, recovery and reuse of an adsorbent calcium hydroxide, and especially effective absorption of NO2. The method is advanced, realizes high efficiency and many kinds of the harmful substances removed from the flue gas, and allows the discharge concentration of the flue gas to be better than notational current discharge standards.

Description

Technical field [0001] The invention relates to a roasting flue gas purification technology, in particular to a roasting flue gas comprehensive adsorption desulfurization and dust removal purification method. Background technique [0002] The flue gas produced by the roaster of the carbon plant contains a large amount of sulfide, fluoride, tar, dust, NO N , Benzopyrene and other harmful substances, these substances will cause serious harm to animals, plants and humans, especially the acid gas SO 2 , NO x And HF is highly corrosive, among which many types of carcinogens, benzopyrene, are more harmful. At present, most of the carbon roasting flue gas treatment uses a single electric tar trap or the back end of the electric tar trap is equipped with alumina adsorption dry purification equipment. This purification equipment can only collect tar, dust, FH, and less. Some benzopyrenes, sulfur-containing substances, nitrogen dioxide, and nitrogen monoxide in the flue gas are almost impo...

AI Technical Summary

Problems solved by technology

At present, most of the treatment of carbon roasting flue gas adopts a single electric tar catcher or the rear end of the electric tar catcher is equipped with alumina adsorption dry purification equipment. This kind of purification equipment can only collect tar, dust, FH, and less Some benzopyrene, sulfur-containing substances, nitrogen dioxide, nitric oxide, etc. in the flue gas are almost impossible to treat (if you want to deal with it, you need to install other desulfurization and denitrification purification treatment equipment), this kind of roasting flue gas has caused environmental damage Great harm; with the strengthening of people's awareness of environmental protection and the country's emphasis on environmental protection issues

Images