Natural gas absorbent regeneration and energy conservation technology and device

Abstract

The invention relates to a natural gas absorbent regeneration and energy conservation technology and a natural gas absorbent regeneration and energy conservation device. The technology and the device can overcome the defects that the energy consumption is great and the heating time is long when the absorbent is regenerated. The technical scheme is as follows: a process of two towers is adopted, one tower is used for dehydration of natural gas and the other one is used for regeneration of natural gas. The two towers are switched for dehydration and regeneration of natural gas. During dehydration of natural gas, compressed natural gas first enters into the dehydration tower A to be dehydrated and obtain dried natural gas after being separated by a front filter separator, then the natural gas enters into a gas storage tank after being separated by a back filter separator; during heating and regeneration of absorbent, after flow reduction and depressurization, the regenerated natural gas is first heated in a heat exchanger and a heater and enters into the dehydration tower B to regenerate the absorbent, then, the natural gas enters into the heat exchanger to be cooled, and finally the natural gas enters into a recovery tank after being separated by a condensation separator; and during cold blowing and regeneration of the absorbent, after flow reduction and depressurization, the regenerated natural gas enters into the dehydration tower B to cold blow and reduce the temperature of the absorbent. According to the technology, complementary utilization of energy is achieved, energy consumption in absorbent regeneration is reduced, and energy-saving operation of the device is realized.

Description

technical field [0001] The invention relates to a natural gas adsorbent regeneration energy-saving process and device for dehydration of natural gas and regeneration of adsorbent in the natural gas industry. Background technique [0002] The water dew point of compressed natural gas for vehicles should comply with the provisions of GB18047. The dehydration device is an important equipment to complete the dehydration of compressed natural gas for vehicles, and it is very important to control the water dew point. At present, the dehydration method of compressed natural gas for vehicles should be dehydration by adsorption method, and the adsorbent should be 4A or 3A molecular sieve. At the same time, in order to ensure the continuous operation of the gas filling station, two or more tower dehydration devices are required to operate alternately. When the two tower dehydration devices are running, one tower performs dehydration operation, and the other tower performs desorption r...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the problems of high energy consumption, large gas consumption, long heating time and incomplete regeneration in the adsorbent regeneration process of the dehydration device, and to provide an energy-saving process and device for regeneration of natural gas adsorbent. Dry natural gas) after throttling and depressurization, exchange heat with the heat of the regenerated gas after desorption, so that the temperature of the cold air is raised and the hot air is cooled, so as to realize the complementary utilization of energy; Blow the dehydration tower to realize the rapid cooling of the dehydration tower, achieve the dual purpose of energy saving and consumption reduction of the dehydration device and optimize the effect of dehydration and regeneration

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