Pretreatment method for dehydrating, dedusting and retaining components to be detected in boiler smoke detection

Abstract

The invention belongs to the technical field of environmental monitoring, in particular to a pretreatment method for dehydrating, dedusting and retaining components to be detected in boiler smoke detection. The method includes that smoke is fed into corresponding buffer solution according to the properties of the smoke to be detected, components with properties opposite to the component to be detected are removed, and meanwhile water vapour and dust in the smoke are absorbed; the buffer solution is divided into sulphur retaining buffer solution and ammonia retaining buffer solution; and sulphur retaining drying agent or ammonia drying agent mixed by analytical reagent is fed in when the humidity of the smoke after being treated is more than or equal to 50%, so as to realize further dehydration. By adopting the method of the invention, dissolution loss of sulphur dioxide or ammonia can be avoided even if cooling dehydration is carried out on high humidity low concentration smoke, and meanwhile the technical problem that dedusting instrument pipeline is easy to be blocked can be efficiently solved, so that a measuring instrument can continuously operate for a long time in an almost dry and dustless environment and is difficult to damage and service life is prolonged.

Description

technical field [0001] The invention belongs to the technical field of environmental monitoring, and in particular relates to a pretreatment method for dehydration, dust removal and retention of components to be measured during boiler flue gas detection. Background technique [0002] At present, there are many types of instruments for monitoring the concentration of sulfur dioxide in boiler flue gas, such as Testo testo350, testo360, German rbr, Yikang ecom-J2KN portable flue gas analyzer, Qingdao Laoying 3012H automatic flue gas tester, Guangzhou Zhen Kang AS2099 pressure-reducing flue gas analyzer, British KANE9106, for high-temperature dry and dusty exhaust gas, often adopts filtration and dust removal method, and there is a filtering device before the flue gas to be tested enters the detector sensor. For the high-humidity and low-concentration flue gas after wet desulfurization, first use a filter screen or filter membrane to filter and remove dust, and then pass the gas...

AI Technical Summary

Problems solved by technology

[0004] The present invention aims at the technical problem that sulfur dioxide or ammonia gas is condensed and dissolved with water vapor in the existing boiler flue gas detection method, and the instrument pipeline is easily blocked by dust, and provides a method for dehydration, dust removal and retention of components to be measured during boiler flue gas detection. The pretreatment method, the flue gas treated by this pretreatment method can not only achieve the purpose of dehydration and dust removal, but also keep the concentration of the components to be measured (acid gas or alkaline gas) in the flue gas basically unchanged, the obtained The detection data is accurate

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