Cryogenic residual liquid treatment device

Abstract

The invention discloses a cryogenic residual liquid treatment device, which comprises a barrel, a liquid inlet pipe, and a heating pipe, the top of the barrel is open, the lower part of the barrel isburied under the ground of a concrete foundation, a cover plate is mounted on the top end of the barrel, an exhaust pipe is mounted on the cover plate, the upper end of the exhaust pipe is communicated with the outside atmosphere, the lower end of the exhaust pipe is communicated with the barrel, the outlet of the liquid inlet pipe passes through the sidewall of the barrel to get into the barrel,the outlet of the liquid inlet pipe is downward, a nozzle is mounted at the outlet of the liquid inlet pipe, the inlet of the liquid inlet pipe is communicated with a cryogenic residual liquid discharge pipe of an air separation plant, the heating pipe passes through the sidewall of the barrel to get into the barrel, the heating pipe is provided with a plurality of exhaust holes, the inlet of theheating pipe is communicated with a heating air source for drying, and cobbles are loaded in the barrel. The device is reasonable in structure, environmentally friendly and safe, can safely and effectively treat a small amount of cryogenic residual liquid discharged by the air separation plant, preventing the leakage of the cryogenic liquid, so that the environmental safety of a discharge area isensured.

Description

technical field [0001] The invention relates to a residual liquid treatment device, in particular to a low-temperature residual liquid treatment device. Background technique [0002] A small amount of cryogenic liquid produced by the air separation unit under certain operating conditions needs to be discharged. For example: when the air separation unit is put into operation for the first time, the pipeline and equipment need to be cooled, and the cryogenic liquid used for cooling will be discharged; during the operation of the air separation unit, there is a working condition that the safety valve takes off and discharges the cryogenic liquid; the backup system of the air separation unit Due to failure or planned shutdown, the liquid in the low-temperature area needs to be discharged before maintenance; in addition, after the completion of charging, the low-temperature liquid in the pipe behind the charging pump needs to be discharged. Due to the small amount of low-tempera...

AI Technical Summary

Problems solved by technology

Due to the small amount of low-temperature liquid discharge under the above working conditions, most factories choose to lead the collecting pipe to the residual liquid pit for direct discharge. However, these low-temperature liquids are in a cryogenic state, and the temperature is generally around -180°C. The civil foundation near the residual liquid pit will be damaged, and a large amount of dense fog will be generated in the area around the residual liquid pit, which will cause great harm to the safety of operators and the environment

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