Liquid nitrogen wash molecular sieve pre-cooling device

Abstract

The invention discloses a liquid nitrogen wash molecular sieve pre-cooling device. The device comprises a pipeline type liquid nitrogen atomization device and a regeneration gas temperature regulation device. The pipeline type liquid nitrogen atomization device comprises a barrel and a liquid nitrogen nozzle. The barrel is fixedly welded on a pipeline for regeneration gas to enter a molecular sieve, the front end of the liquid nitrogen nozzle is located in the barrel, and the rear end of the liquid nitrogen nozzle penetrates out from one side of the barrel and is connected with a liquid nitrogen pipeline. The regeneration gas temperature regulation device comprises a first liquid nitrogen flow control valve, a second liquid nitrogen flow control valve and a field temperature gauge. The first liquid nitrogen flow control valve and the second liquid nitrogen flow control valve are mounted on the liquid nitrogen pipeline, and the liquid nitrogen pipeline arranged between the first liquid nitrogen flow control valve and the second liquid nitrogen flow control valve is provided with a low point inverse spraying drain valve. The field temperature gauge is mounted on the pipeline for regeneration gas to enter the molecular sieve at an outlet of the pipeline type liquid nitrogen atomization device. According to the liquid nitrogen wash molecular sieve pre-cooling device, the molecular sieve can be pre-cooled in the driving process, the purpose that the driving time is effectively shortened in the liquid nitrogen wash process can be achieved, effective gas emptying can be greatly reduced, and thus waste is avoided.

Description

technical field [0001] The invention relates to the field of synthetic ammonia production equipment, and mainly relates to a liquid nitrogen washing molecular sieve precooling device. Background technique [0002] The gas deep purification process is a key link in the modern synthetic ammonia production process. The liquid nitrogen washing process is currently the most advanced gas deep purification process in the world. The liquid nitrogen washing device has been introduced from abroad so far, and its operation is safe and reliable, and the gas purification degree is high. The high degree of automation of the device has been unanimously recognized by the industry, and it is precisely because its advantages are too obvious compared with other processes, which conceals the shortcomings of the device's long operating time, and it will not be effectively solved if it does not attract enough attention. The first time the liquid nitrogen washing device starts up, after the pu...

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide a liquid nitrogen washing molecular sieve precooling device, which has simple structure, low manufacturing cost and flexible operation, can effectively shorten the start-up time of the liquid nitrogen washing process, and can greatly reduce the effective gas To avoid waste, and solve the problem of insufficient cooling of the molecular sieve, which leads to high gas temperature at the outlet of the molecular sieve during the waiting period, and relatively insufficient cooling capacity of the cold box

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