Method for removing SOx in gases with polyol complex solution

Abstract

The invention discloses a method for removing SOx in gases with a polyol complex solution. The method is characterized by mixing polyols with organic acids and / or organic acid salts to prepare the polyol complex solution, and contacting the polyol complex solution with gases containing SOx to absorb SOx in gases, wherein x is equal to 2 and / or 3; the polyols refer to organic compounds simultaneously containing two or more hydroxy groups in the same organic molecule except glycol and polyethylene glycol. The polyol complex solution absorbing SOx is regenerated by one or more of a heating method, a vacuum method, a gas stripping method, an ultrasonic wave method, a microwave method and a radiation method and releases sulfur dioxide and sulfur trioxide byproducts, and the regenerated polyol complex solution is recycled. The method can be used for desulfurizing flue gases, incineration gases, coke oven gases, synthetic waste gases in dye houses, blow-down gases in chemical fiber factories and other industrial raw 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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