A kind of dangerous liquid negative pressure pipeline sampling system and method

Abstract

The invention discloses a negative pressure pipeline sampling system and method for dangerous liquids. The system includes: a nitrogen balance tank, a sample liquid accumulation pipe, a crude product receiving tank, a fine product receiving tank and a vacuum buffer tank; The discharge main pipe is transported to the crude product receiving tank and the fine product receiving tank respectively. The lower end of the discharge main pipe before the three-way valve II is connected to the crude product receiving tank through the discharge branch pipe provided with the sample liquid accumulation pipe. The sample liquid accumulation pipe and the discharge main pipe are connected. There is an on-off valve I between the samples, and a three-way valve I is arranged between the sample liquid pipe and the crude product receiving tank; among them, the remaining outlet of the three-way valve I is used as a sampling port; the discharge branch pipe between the sample liquid pipe and the switch valve I A nitrogen balance tank is connected to the upper part through a pipeline, and a one-way valve and an on-off valve II are arranged between the outlet of the nitrogen balance tank and the inlet of the sample liquid accumulation pipe; the crude product receiving tank is evacuated through the vacuum pipeline to form a negative pressure pipeline; The method enables real-time sampling of dangerous liquids in a fully enclosed negative pressure pipeline.

Description

technical field [0001] The invention relates to the technical field of fine chemicals, in particular to a system and method for sampling a negative pressure pipeline of dangerous liquids. Background technique [0002] Trimethylsilyl trifluoromethanesulfonate is a flammable chemical (hazardous chemical), used as a catalyst and a silylation reagent in organic synthesis, it is a transparent slightly yellow liquid; trimethylsilyl trifluoromethanesulfonate Ester can react violently with water, and the preparation process uses a negative pressure environment. The product has strong water absorption and is easy to fumes in the air to form an acidic mist, polluting the environment and easily causing harm to the human body. In order to avoid its entry during the sampling process Air causes explosion accidents and damage to human body and environment. It is necessary to design an automatic sampling method of trimethylsilyl trifluoromethanesulfonate negative pressure pipeline to solve ...

AI Technical Summary

Problems solved by technology

[0002] Trimethylsilyl trifluoromethanesulfonate is a flammable chemical (hazardous chemical), used as a catalyst and silylation reagent in organic synthesis, it is a transparent slightly yellow liquid; trimethylsilyl trifluoromethanesulfonate Ester can react violently with water, and the preparation process uses a negative pressure environment. This product has strong water absorption, and it is easy to smoke and form acid mist in the air, polluting the environment, and at the same time easily causing harm to the human body. Air causes explosion accidents and damage to human body and environment. It is necessary to design an automatic sampling method of trimethylsilyl trifluoromethanesulfonate negative pressure pipeline to solve the above problems

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