P-xylene storage system and process based on inert gas protection

Abstract

The invention discloses a p-xylene storage system based on inert gas protection. The system comprises a pressure container for storing inert gas, a p-xylene storage tank for storing liquid-state p-xylene, a buffer tank and a condenser, wherein the pressure container is respectively connected with the p-xylene storage tank and the buffer tank through gas guide pipelines; air compressors are respectively arranged on the gas guide pipeline for connecting the pressure container with the p-xylene storage tank and the gas guide pipeline for connecting the pressure container with the buffer tank; the p-xylene storage tank passes through a centrifugal pump and is connected to the upper part of the condenser through a gas guide pipeline; the lower part of the condenser is connected with the buffer tank; the buffer tank is connected with the p-xylene storage tank through a gas guide pipeline and a liquid guide pipeline; and an air compressor is arranged on the gas guide pipeline for connecting the buffer tank with the p-xylene storage tank. The system realizes the storage of p-xylene. The system can solve the unsafety problem generated due to long-time storage of p-xylene by the storage tank in the prior art, so that the potential safety hazard of gas leakage of the storage tank can be timely discovered through detecting the inert gas in the environment.

Description

technical field [0001] The invention belongs to the technical field of petrochemical industry, and in particular relates to a p-xylene storage system based on inert gas protection, and also relates to a p-xylene storage process based on inert gas protection. Background technique [0002] P-xylene (p-xylene), also known as 1,4-xylene, is a derivative of benzene, which can be abbreviated as "PX". P-xylene is one of the isomers of xylene, it is a colorless liquid, and it becomes flaky or columnar crystals at low temperature. Its polymerization product is parylene, which is mainly used as a raw material for the production of polyester fibers and resins, coatings, dyes and pesticides. [0003] Paraxylene is irritating to the eyes and upper respiratory tract and degreases the skin. Short-term inhalation of higher concentrations of p-xylene gas may cause obvious eye and upper respiratory tract irritation symptoms, and in severe cases may cause pulmonary edema; long-term exposure ...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a p-xylene storage system based on inert gas protection, which solves the unsafe problem of using storage tanks to store p-xylene for a long time in the prior art

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