The endpoint for the absorption of chlorine by liquid caustic has been determined.
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Chlorinated exhaust gases contain hydrogen chloride and chlorine; they are first absorbed with water to form hydrochloric acid, and then absorbed with liquid alkali in two stages to form sodium hypochlorite. So, for determining the end point of absorption, is it by taking samples at regular intervals and sending them to the laboratory for testing, or are there other methods available in the workshop to determine the end point?
ORP (oxidation-reduction potential) can be used to monitor the absorption process and roughly estimate the degree of absorption, but it cannot accurately determine the so-called end point of absorption.
About that’s fine, because it’s not possible to conduct tests on samples all the time; testing just before reaching the end point is sufficient. Are there any manufacturers or brands you would recommend?
I can only suggest using simultaneous monitoring of conductivity and ORP; the data near the endpoint will need to be determined by you or the user based on the actual conditions of production or through experiments, as I cannot provide you with detailed data for adjustment or control. You can choose this type of analyzer by yourself. Our products are those from Japanese company DKK, which measure conductivity and ORP. You can ask Mr. Zhou Dianfa from Xi’an DiKai Company about them; you can mention that it was a friend surnamed Qu who recommended them to you.
The order of priorities is reversed; is the purpose of spraying alkaline solutions to produce products or to treat harmful waste gases? When dealing with waste gases, it is important to monitor whether they meet the required standards. When the exhaust gas is nearly up to standard, it’s time to replace the spray tower; it doesn’t matter what the level of the spray liquid is
This post was last edited by goldliyang on 2021-4-26 at 17:30. Online monitoring of the effective chlorine concentration of the free base in hyposodium can help determine the end point of the reaction
The purpose of spraying is to ensure that the exhaust gases meet the standards, but since I am using secondary absorption, the exhaust gases will definitely meet those standards