Vacuum safe sampling device for chemical reactor

Abstract

The invention discloses a vacuum safety sampling device for a chemical reaction kettle, which comprises a vacuum pump, a sampling tank, a pressure pump, a pressure sensor and a controller. The vacuum pump is connected to the sampling tank through a negative pressure tube, and the inside of the negative pressure tube is A first electric control valve is installed, the right side of the sampling tank is connected to the connecting flange through a pipe, and the right end of the connecting flange is fixed to the sampling port, the sampling port is opened at the lower end of the main body of the reaction kettle, and a pressure sensor is installed in the sampling port , a second electric control valve is installed in the pipeline between the sampling tank and the connecting flange, and the pipeline on the left side of the second electric control valve is connected to the pressurized pipe, and the other end of the pressurized pipe is connected to the pressurized pump The pressurized tube is connected to the nitrogen tank through a pipeline, and a third electric control valve is installed inside the pressurized tube, and the controller is installed on the outer wall of the vacuum pump. After sampling, the present invention has no residual liquid in the sampling tube, and ensures that the internal pressure of the reaction kettle remains unchanged, and does not affect the reaction of raw materials in the reaction kettle.

Description

Technical field [0001] The invention relates to the technical field of chemical reaction equipment, in particular to a vacuum safety sampling device used in a chemical reaction kettle. Background technique [0002] At present, in the chemical industry, it is often necessary to sample and analyze liquid materials in a vacuum state, and it cannot affect the original vacuum environment. The existing sampler used for sampling the reaction liquid in the vacuum reactor has the following problems when used: part of the air will enter the system, which will affect the vacuum of the system, or bring impurities in the process of taking and affect the purity of the liquid in the system. Sometimes it’s even difficult to sample under high vacuum conditions. After sampling, the residual liquid in the pipeline cannot return to the reactor to continue to participate in the reaction. When the next sample is started, the residual liquid will be mixed with the new sample The liquid enters the samp...

AI Technical Summary

Problems solved by technology

The existing samplers used for sampling the reaction liquid in the vacuum reactor have the following problems: some air will enter the system, which will affect the vacuum degree of the system, or impurities will be brought in during the taking process, which will affect the purity of the liquid in the system Sometimes it is even difficult to take samples under high vacuum conditions. After the sampling is completed, the residual liquid in the pipeline cannot return to the reactor to continue to participate in the reaction. When the next sampling is started, the residual liquid will be mixed with the new sampling The liquid enters the sampling tank, which affects the accuracy of sampling, and the internal pressure of the reactor changes during sampling, resulting in incomplete reaction of the raw materials in the reactor.

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