An adaptive energy-saving pressure swing adsorption separation system

Abstract

The invention relates to a self-adaptive energy-saving type pressure swing adsorption separation system, belonging to the technical field of pressure swing adsorption gas separation. The self-adaptive energy-saving type pressure swing adsorption separation system comprises a dew point drying system and a nitrogen generation system, wherein the dew point drying system comprises a feed gas system, a first precise filter, a micro-heating dryer and a second precise filter, a pipeline at the bottom of the micro-heating dryer is sequentially connected with an air storage tank, a supercharger and a high-efficiency degreaser, the gas outlet end of the high-efficiency degreaser is communicated with a pipeline between the feed gas system and the first precise filter, and the other pipeline at the bottom of the micro-heating dryer is connected with a dew point drying venting system; the nitrogen generation system comprises an air process tank and a nitrogen generation machine, a pipeline at the top part of the nitrogen generation machine is connected with a first flowmeter, a nitrogen generation venting system and the feed gas system sequentially, the other pipeline at the top part of the nitrogen generation machine is sequentially connected with a nitrogen process tank, a third precise filter and a second flowmeter, and a pipeline of the second flowmeter is connected with a nitrogen storage tank and a standby nitrogen storage tank which are connected with each other in parallel. The self-adaptive energy-saving type pressure swing adsorption separation system fully utilizes tail gas as a raw material, the extraction recovery rate of a gas product is increased and waste is reduced.

Description

technical field [0001] The invention belongs to the technical field of pressure swing adsorption gas separation, and in particular relates to an adaptive energy-saving pressure swing adsorption separation system. Background technique [0002] Pressure swing adsorption separation method is commonly used to separate gas, that is, PSA process. During the operation of the process flow, the state of the valve is periodically switched, so that each adsorption tower is periodically switched between the adsorption, regeneration, desorption, and pressure equalization processes, and a large amount of tail gas is required to be emptied and released. There are many products in the tail gas Gas components, especially in the tail gas of the molecular sieve regeneration adsorption tower by blowing back the product gas, the concentration of part of the product gas is higher than that of the raw material gas. The general PSA process directly vents the tail gas, and all the tail gas with rec...

AI Technical Summary

Problems solved by technology

The general PSA process directly vents the tail gas, and all the tail gas with recovery value is wasted, so that the gas extraction recovery rate of the PSA process is low, and the pressure energy in the tail gas cannot be fully utilized after emptying, which increases the energy consumption of the equipment. increase production costs

In addition, the gas of the venting system after the buffer filtration system has not been utilized, and it cannot respond to the random use characteristics of the customer's on-site gas consumption during the peak period

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