Method for denitration of complexing ferroporphyrin smoke based on supergravity

Abstract

The invention discloses a method for denitration of complexing ferroporphyrin smoke based on supergravity. The method comprises the following steps of feeding desulfurated smoke which is at the temperature of 40 DEG C-120 DEG C and contains NOx into a supergravity machine to carry out countercurrent contact on the smoke and an absorber which is at the temperature of 0 DEG C-55 DEG C and enters into the supergravity machine in a rotor packing layer of the supergravity machine, and reacting for denitration; feeding cleaned smoke into a demister from the air phase outlet of the supergravity machine and then entering into a discharging system; flowing denitrated rich liquor into a balance tank from the liquid phase outlet of the supergravity machine, and then flowing into a settling tank from the balance tank, so that solid in the denitrated rich liquor is settled to the bottom, filting to recover sulfur, and pumping filtrate into the settling tank; pumping out upper clear liquid to be fed into the supergravity machine to be mixed with supplemented a reducer on line, and then flowing into the supergravity machine for circular absorption and denitration. The method provided by the invention has the advantages that supergravity equipment is utilized as gas-liquid mass transfer strengthen equipment; the method is beneficial to removal of NOx, the complexing ferroporphyrin is utilized as the absorber, the absorption efficiency is high, the regeneration effect is good, an absorption liquid is applied in a circulating manner, and the denitration rate is more than 96%.

Description

technical field [0001] The invention relates to purification of industrial flue gas, in particular to a method for denitrification of flue gas by complexing ferrous iron under high gravity. Background technique [0002] The pollution of acid rain and its harm have become one of the important environmental issues concerned by countries all over the world. my country is a country where coal is the main energy source. According to survey statistics, more than 90% of SO in my country 2 、More than 67% NO X , More than 70% of the soot emissions come from the combustion of coal. The SO produced by coal combustion 2 and NO X It is the main source of industrial waste gas pollution (acid rain hazard). Nitrogen oxides can also form photochemical pollution, produce the greenhouse effect, destroy the ozone layer, and have toxic effects on the human body. Nitrogen oxides and sulfur oxides can also be converted into PM2.5 to cause haze weather. [0003] At present, the selective cat...

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Problems solved by technology

Domestic scholars have reported iron filings, malic acid, vitamin C, etc. to regenerate Fe(III)EDTA, but the key problems of this technology are high operating costs and complicated process routes, and further research is needed

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