Method for removing SOx in gas by using ethylene glycol complex solution

Abstract

The invention discloses a method for SOx in a gas by using ethylene glycol complex solution. Ethylene glycol and / or polyethylene glycol is mixed with organic acid or organic acid salt without containing nitrogen atoms in molecules to form the ethylene glycol complex solution, and the ethylene glycol complex solution is in contact with the gas containing Sox to absorb SOx in the gas, wherein x is equal to 2 and / or 3; the ethylene glycol complex solution in which SOx is absorbed is regenerated by using one or more ways of a heating method, a vacuum method, a gas stripping method, an ultrasonic method, a microwave method and a radiation method, sulfur dioxide and sulfur trioxide byproducts are released, and the regenerated ethylene glycol complex solution is recycled. The method can be applied to desulfurization of flue gases, incineration gases, coke furnace gases, synthetic waste gases in a dyestuff plant and sewage disposal gases in a chemical fibre factory, and other industrial raw material gases or waste gases containing SOx.

Description

technical field [0001] The present invention relates to the purification method of flue gas, waste gas containing sulfur and / or industrial raw material gas, in particular to removing SOx (x=2 and / or 3) in flue gas, waste gas containing SOx and / or industrial raw material gas )Methods. Background technique [0002] Due to the rapid development of industry, the consumption and emission of flue gas, sulfur-containing industrial raw material gas and other waste gases are increasing day by day. The discharge of sulfur-containing exhaust gas has caused serious environmental pollution, such as the formation of acid rain, acidification and corrosion of buildings, respiratory diseases and skin diseases, etc., which directly endanger human health. Over the years, scientific and technological workers from all over the world have conducted more research on flue gas, sulfur-containing industrial raw material gas and other waste gas desulfurization technologies, and have accumulated more ...

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Problems solved by technology

[0015] From our current research results, these side reactions may be irreversible reactions, that is to say, we have not yet found a way to reverse these side reactions, and the generated sulfinic acid esters and sulfonic acid esters cannot continue to regenerate and release sulfur dioxide or Sulfur trioxide, with the increase of sulfinate and sulfonate in the solution, the sulfur absorption capacity of the solution decreases, the solution deteriorates, seriously endangers the system, and even makes the system unable to operate continuously

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