Zero-loss internal recycle type gas purifying method and device

Abstract

The invention relates to zero-loss internal recycle type gas purifying method and device, which use regeneration adsorbing drying towers for high temperature gas discharged by a compressor or obtained by heating the low temperature gas. In a period, one tower is taken as a drying tower while the other one is used as a regeneration tower. The method comprises the following two stages: the first stage is drying-heating regeneration stage: the high temperature gas enters the regeneration tower, then enters a post-positioned water cooler to lower the temperature, then flows to a post-positioned oil-water separator and enters the drying tower to be dried; and the second stage is drying-cold blowing regeneration stage: after the first stage is finished, a PLC controller sends a command; the direction of the high temperature gas is changed under control of a valve, and the high temperature gas firstly flows to a pre-positioned water cooler and a pre-positioned oil-water separator; partial cooled gas still enters the regeneration tower for cold blowing while the rest is mixed with the gas entering the regeneration tower for cold blowing through the valve, and the mixture enters the post-positioned water cooler and the post-positioned oil-water separator for deep cooling, then enters the drying tower to be absorbed to produce dried gas. The invention has the advantages of simple and reliable method, convenient use, energy saving and the like.

Description

technical field [0001] The invention relates to a gas purification method and device, in particular to a gas purification method and device using a regenerative adsorption dryer. Background technique [0002] With the rapid development of purification technology and the widespread application of adsorption dryers, the comprehensive energy consumption per unit production of product gas has become an important parameter to evaluate the performance of finished products. While ensuring the quality of product gas is stable, minimizing equipment energy consumption has become a major goal of purification. The direction of technology development and the pursuit of goals. From the principles of purification technology and practical experience, the main factors affecting the performance of finished products and unit energy consumption are the dynamic adsorption capacity of the adsorbent, regeneration efficiency, equipment structure and pipeline design, and equipment load. The dynamic...

AI Technical Summary

Problems solved by technology

However, in the conventional control method of compressed air dryers commonly used at present, the regeneration of adsorbents in the process mostly uses part of the product gas for regeneration. For example, the switching time of the heatless regenerative adsorption dryer is short, the frequency is high, and the regeneration gas consumption is large (10- 15%), while the heat regenerative adsorption dryer needs a heater to heat the gas, which consumes a lot of electric energy and consumes (8-12%) of the finished gas

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