Acid gas stabilization treatment method and combustion exhaust treatment equipment

Abstract

The invention provides an acid gas stabilizing treatment method and combustion exhaust gas treatment equipment. The adding amount of two alkaline agents that are different in property and are added into acid gas can be properly controlled. The combustion exhaust gas treatment equipment suitable for the acid gas stabilizing treatment method comprises a second acid gas testing device, a first adding device and a second adding device all of which are disposed in an introduction passage; a first acid gas testing device that is disposed in a discharge passage; and an adding amount control device. The adding amount control device includes a first adding amount calculation part that receives concentration signals of first acid gas and outputs first adding amount signals; and a second adding amount calculation part that receives concentration signals of second acid gas and the first adding amount signals, and outputs second adding amount signals. The first adding device and the second adding device add, based on the first adding amount signals and the second adding amount signals respectively, a first alkaline agent and a second alkaline agent into combustion exhaust gas flowing in the introduction passage.

Description

technical field [0001] The present invention relates to a method and equipment for stabilizing combustion exhaust, which includes combustion exhaust in municipal waste incinerators, industrial waste incinerators, power generation boilers, carbonization furnaces, private factories, etc. Harmful acid gases such as hydrogen chloride and sulfur oxides generated in facilities, specifically, a method for stabilizing combustion exhaust gas and combustion exhaust gas treatment equipment capable of effectively controlling the amount of alkali agent added to treat acid gas. Background technique [0002] Combustion exhaust gas produced in combustion furnaces of municipal waste incinerators, industrial waste incinerators, power generation boilers, carbonization furnaces, private factories, etc., contains harmful acid gases such as hydrogen chloride gas and sulfur oxide gas. Moreover, the combustion equipment is to add two kinds of alkali agents with different properties such as slaked l...

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Problems solved by technology

[0004] Slaked lime for treating acid gas has the property that the reaction rate with hydrogen chloride gas increases with the concentration of hydrogen chloride gas (for example, see Non-Patent Document 1), but it has low reactivity with acid gas and particularly reactivity with sulfur oxides. low nature

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