Device used for detecting content of dioxin in flue gas

Abstract

The invention belongs to the technical field of industrial pollutant detection, and more specifically relates to a device used for detecting content of dioxin in flue gas. The device comprises a sampling pipe used for extracting flue gas to be detected from a furnace; the sampling pipe is connected with a sample storage tank containing deionized water; the upper part of the sample storage tank is provided with a sampling interface, and the lower part is provided with a water inlet pipe interface and a water outlet pipe interface; the three interfaces and the sampling pipe are provided with a valve respectively; a thermal insulation layer is arranged between the pipe wall of the sampling pipe and a sampling pipe shell outside the sampling pipe; a gas outlet end of the sampling pipe is inserted into liquid in the sample storage tank, the sampling interface is connected with a vacuum pump, and the vacuum pump is used for vacuumizing the space above the liquid surface in the sample storage tank, and conveying dioxin into an analyzer. The device can be used for complete sampling and analysis of dioxin in high temperature flue gas, measuring and analysis accuracy is increased, requirement on measuring equipment heat resistance is relatively low, and operation process is safe and reliable.

Description

technical field [0001] The invention relates to the technical field of industrial pollutant detection, in particular to a tool for detecting dioxin content in flue gas. Background technique [0002] Due to the advancement of the industrialization process, the ecology has been continuously destroyed, and various environmental problems have gradually been exposed. How to control various types of pollution has become a topic of concern in the current society and scientific circles. With the advancement of science and technology, the living standard of human society continues to rise day by day, accompanied by the improvement of the quality of life is the gradual increase of domestic waste and industrial waste. At present, the general practice of waste disposal at home and abroad has changed from traditional landfill to incineration. The incineration process can not only solve the problem of soil destruction caused by landfill, but also collect and reuse the heat energy genera...

AI Technical Summary

Problems solved by technology

Due to technical limitations, there are currently the following problems in the industry for the determination of dioxin content in flue gas: 1) Direct method: the detection end of the temperature detection equipment is directly inserted into the high-temperature flue gas in the furnace for detection, but due to the The flue gas temperature is usually greater than 1000 degrees Celsius, which requires too high heat resistance of the detection device; 2) Indirect method: the high-temperature flue gas is output from the furnace for detection, because the high-temperature flue gas will be recombined in the cooling process in the outside world Dioxins, so the data measured by this method are inaccurate

Moreover, flue gas generally contains a large amount of dust-like harmful substances. In the process of analyzing dioxins through the indirect method, if such dust substances enter the analysis instrument, it is easy to block the filter paper used for analysis, which greatly increases the frequency of filter paper replacement. It not only increases the cost of detection and the complexity of operation, but also reduces the life of the equipment and interferes with the final dioxin detection results

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