Liquid-phase substance sampling device in long-term dioxin sampling

Abstract

The invention discloses a liquid phase substance sampling device in long-term dioxin sampling. The liquid phase substance sampling device comprises a sampling gas pipe, a stop valve, a heater, a condenser, a controller, a sampling device and an XAD2 sampling cylinder, wherein one end of the sampling gas pipe is provided with a sampling probe, and the other end of the sampling gas pipe is connectedwith the input port end of the condenser. During system sampling, condensate water is periodically discharged through a peristaltic pump and the volume is metered; wherein the sum of the water discharge amount and the remaining amount serves as the total liquid phase amount, the remaining condensate water amount in a volumetric flask serves as the sampling amount after operation is completed, thesampling ratio is automatically calculated through a program, and a liquid phase detection value of overall sampling operation is obtained after a sampling detection result and the sampling ratio arecalculated. The long-term continuous sampling is guaranteed, dioxin substances in a liquid phase can be accurately detected, the working efficiency of liquid phase sample feeding work after samplingwork is greatly improved, the detection precision is improved, and the detection efficiency is improved.

Description

【Technical field】 [0001] The invention relates to the technical field of exhaust gas sampling equipment, in particular to the technical field of long-term dioxin sampling devices. 【Background technique】 [0002] During the dioxin sampling process, after condensation, the condensed water containing dioxin-like substances in the liquid phase will continue to precipitate. The traditional method is to store it in a glass volumetric flask. Due to the limited volume of the bottle, this method can only be used for short-term operations. There are still some in the industry. In order to be able to operate for a long time, the automatic sampling equipment directly discharges the condensed water. Due to the lack of liquid phase dioxin samples, the negative deviation of the detection results is serious, which affects the detection accuracy. 【Content of invention】 [0003] The purpose of the present invention is to solve the problems in the prior art, and propose a long-term dioxin sa...

AI Technical Summary

Problems solved by technology

[0002] During the dioxin sampling process, after condensation, the condensed water containing dioxin-like substances in the liquid phase will continue to precipitate. The traditional method is to store it in a glass volumetric flask. Due to the limited volume of the bottle, this method can only be used for short-term operations. There are still some in the industry. In order to be able to operate for a long time, the automatic sampling equipment directly discharges the condensed water. Due to the lack of liquid phase dioxin samples, the negative deviation of the detection results is serious, which affects the detection accuracy.

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