Online alternate concentration and release device of flue gas pollutant

Abstract

The present invention provides an online alternate concentration and release device of a flue gas pollutant, belonging to the technical field of concentration samples. The device comprises a gas source pipeline module, a water removal module, a first-level enriching and release module and a second-level enriching and release module which are connected in order; the first-level enriching and release module is internally provided with an eight-way valve, a first sampling trap and a second sampling trap; the two ends of the first sampling trap and the two ends of the second sampling trap are respectively connected with the eight-way valve; by switching of the eight-way valve, the samples are alternately inlet into the first sampling trap and the second sampling trap. By adopting two-level absorption, the first-level absorption adopts a large-size sampling cold trap to absorb a lot of substances, and the second-level absorption adopts a small-size focusing cold trap, so that the defects are overcome that the target material compositions of a traditional flue gas sampling device are too few; and moreover, the device provided by the invention is an online concentration and release device which can achieve alternate enriching for the flue gas pollutant so as to achieve continuous sampling and analysis.

Description

technical field [0001] The invention belongs to the technical field of concentrated samples, and in particular relates to an online alternate concentration and release device for flue gas pollutants. Background technique [0002] At present, the relevant technologies of waste incineration and utilization in my country have been widely used, and will maintain a high-speed development trend in the next 10 years. The discharge of secondary pollutants caused by waste incineration, especially the discharge of dioxins, has attracted more and more attention from the government and the public, and has even become a problem that plagues the entire process of site selection, construction, and operation of many waste incineration power generation projects. Tricky question. [0003] According to the requirements of the "Stockholm Convention on Persistent Organic Pollutants" to reduce the emission of dioxins, various emission sources in my country must effectively achieve the reduction ...

AI Technical Summary

Problems solved by technology

Dioxins are trace-level substances, and the concentration in flue gas is generally 10 -10 g / m 3 Therefore, it is technically difficult to accurately measure its concentration. At present, most of the detection methods for flue gas pollutants other than dioxins are very mature, but the detection of dioxin emissions from incinerators has not yet been realized. Online rapid detection

This indirect detection method needs to overcome the problems of complex components in the flue gas, uneven concentrations, high moisture content, and complicated sampling flow paths.

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