Sampling device applicable to high-pressure gas-liquid mixed reaction liquid

Abstract

The invention provides a sampling device applicable to high-pressure gas-liquid mixed reaction liquid. The sampling device comprises a reactor, an online sampling channel and an offline sampling channel, wherein the reactor (1) is connected with an outlet channel for the high-pressure gas-liquid mixed reaction liquid to flow out; the outlet channel is connected with the online sampling channel andthe offline sampling channel through a three-way connector; the offline sampling channel is provided with a condenser (3) and a three-way switching valve (4) in sequence along a flowing direction ofthe high-pressure gas-liquid mixed reaction liquid; the three-way switching valve (4) is further connected with a reflowing channel and a manual sampling channel; the reflowing channel is in fluid communication with the reactor (1); the three-way switching valve (4) is provided with a valve rod. When the sampling device provided by the invention is used for sampling the high-pressure mixed reaction liquid, the sampling device is simple and convenient to operate and has good sample flow real-time responsiveness; a sample flow is in zero contact with an operator so that the safe and environment-friendly effects are realized.

Description

technical field [0001] The invention relates to a sampling device, in particular to a sampling device suitable for high-pressure gas-liquid mixed reaction liquid. Background technique [0002] In the production of acetic acid produced by the carbonylation reaction of methanol liquid and CO gas, due to the characteristics of high temperature, high pressure, toxicity and strong corrosion of the carbonylation reaction liquid, it is necessary to be particularly cautious when sampling and analyzing the reaction liquid in the prior art. The usual sampling method is: draw the sample to be tested from the reactor overflow channel, the sample to be tested passes through the channel to be cooled by the condenser, the defoamer is defoamed, and the flow controller is used for flow control. The valve control completes the manual sampling of laboratory samples, and the other sample to be tested enters the online chromatograph through the channel for online chromatographic detection, such ...

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Problems solved by technology

[0004] In view of the shortcomings of the prior art described above, the purpose of the present invention is to provide a sampling device suitable for high-pressure gas-liquid mixed reaction liquid, which is used to solve the sampling method when sampling the high-pressure gas-liquid mixed reaction liquid in the prior art. There are problems caused by insufficient test accuracy, potential safety hazards, and easy corrosion of sampling materials.

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