Method for preventing and dredging liquid carbon dioxide pipeline from forming dry ice

Abstract

The invention discloses a method for preventing and dredging a liquid carbon dioxide pipeline from forming dry ice. The method comprises the following steps of: S01, arranging an outer heating pipe on the outer side of a liquid carbon dioxide pipeline, arranging a sealing structure between two ends of the heating pipe and a carbon dioxide conveying pipe, arranging a hot air inlet and a hot air outlet in the two ends of the outer wall of the heating pipe in the length direction; S02, connecting a discharge pipe to the middle of the liquid carbon dioxide pipeline in a communicating mode; and S03, arranging two flow regulating valves in the two ends of the liquid carbon dioxide pipeline in the length direction respectively. According to the method for preventing and dredging the liquid carbon dioxide pipeline from forming the dry ice provided by the invention, the outer heating pipe is arranged on the outer side of the liquid carbon dioxide pipeline, a frozen liquid carbon dioxide pipeline can be heated and dredged by introducing hot steam into the outer heating pipe, and an ice breaking mechanism is further arranged in a matched mode, ice on the inner wall of the liquid carbon dioxide pipeline can be crushed, so that the heating efficiency is improved, and the dredging efficiency is improved.

Description

technical field [0001] The invention relates to the technical field of anti-icing of liquid carbon dioxide pipelines, in particular to a method for preventing and dredging dry ice of liquid carbon dioxide pipelines. Background technique [0002] Carbon dioxide, a carbon oxide, has a chemical formula of CO2 and a chemical formula weight of 44.0095. It is a colorless and odorless gas under normal temperature and pressure, or a colorless and odorless gas with a slightly sour aqueous solution. It is also a common greenhouse gas. It is also one of the components of air (accounting for 0.03%-0.04% of the total volume of the atmosphere). In terms of physical properties, the melting point of carbon dioxide is -56.6°C (527kPa), the boiling point is -78.5°C, and its density is higher than that of air (standard conditions below), soluble in water. In terms of chemical properties, carbon dioxide is chemically inactive, has high thermal stability (only 1.8% decomposes at 2000°C), cannot...

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Problems solved by technology

[0003] During the use of the existing liquid carbon dioxide pipeline, there is no structure to prevent freezing. When the liquid carbon dioxide pipeline is used, it is easy to freeze, which affects the stability of the liquid carbon dioxide pipeline. Secondly, for the frozen liquid carbon dioxide The pipeline lacks a dredging structure, so it cannot meet the needs of users