Shale gas based molecular sieve cyclic dehydration system

Abstract

The invention provides a shale gas based molecular sieve cyclic dehydration system. The system comprises a dehydration tower, a first heat exchanger, a second heat exchanger, an air cooler, a compressor, a separator and a heater. The first heat exchanger is communicated with the second heat exchanger, the top of the dehydration tower is connected with the first heat exchanger through a first connection pipe, and the second heat exchanger is connected with the air cooler through a second connection pipe. The air cooler is connected with an air inlet of the separator through a third connection pipe, the top of the separator is connected with the compressor through a fourth connection pipe, and the compressor is connected with the second heat exchanger through a fifth connection pipe. The first heat exchanger is connected with the heater through a sixth connection pipe, and the heater is connected with the dehydration tower through a seventh connection pipe. By cooperation of the heat exchangers with other devices, separated shale gas is subjected to heat balance preheating in the heat exchangers, and accordingly energy consumption in heating of shale gas is reduced.

Description

technical field [0001] The invention relates to the field of natural gas purification, and more specifically relates to a shale gas-based molecular sieve circulation dehydration system. Background technique [0002] Shale gas is a natural gas resource that can be exploited in shale formations. China's shale gas recoverable reserves rank first in the world. The formation and enrichment of shale gas has its own unique characteristics, and it is often distributed in thick and widely distributed shale source rock formations in the basin. Compared with conventional natural gas, shale gas development has the advantages of long mining life and long production cycle. Most gas-producing shales are widely distributed, thick, and generally contain gas, which enables shale gas wells to maintain long-term stable growth rates. Gas production rate. [0003] Molecular sieve dehydration devices are widely used in shale gas extraction and purification systems. However, in existing dehydrati...

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Problems solved by technology

[0005] In view of the above, the object of the present invention is to provide a molecular sieve circulating dehydration system based on shale gas, which is used to solve the problem of excessive energy consumption in existing shale gas dehydration equipment

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