Device and method for preparing high-purity oxygen gas based on chemical-loop air separation technique

Abstract

The invention relates to a device and a method for preparing high-purity oxygen gas based on chemical-loop air separation technique, and belongs to the field of oxygen gas preparation based on chemical loop techniques and air separation techniques. The device comprises a fluidized bed, a cyclone separator, a fixed bed, a waste heat boiler, a condenser, a bag-type dust collector and a gas storage tank. The fluidized bed is connected with the cyclone separator, the sealing legs at the bottom of the cyclone separator extend into the fixed bed and are connected with the fixed bed, the fixed bed is connected with the fluidized bed, the cyclone separator is connected with the waste heat boiler, the waste heat boiler is connected with the fixed bed, the waste heat boiler is connected with the condenser, the condenser is connected with the fluidized bed, the condenser is connected with the fixed bed, the condenser is connected with the bag-type dust collector, and the bag-type dust collector is connected with the gas storage tank. After shutdown of the device, the excessive steam is introduced into a steam pipe network, and the oxygen-depleted air from the cyclone separator together with industrial flue gas is introduced into the waste heat boiler to generate steam, resulting in a circulating system. The cooling water of the condenser has a temperature of about 60-80 DEG C and serves as water supplement for the waste heat boiler, which achieves the effect of recycling water resources.

Description

technical field [0001] The invention belongs to the fields of chemical chain technology and air separation preparation of oxygen, and in particular relates to a device and method for preparing high-purity oxygen by chemical chain air separation technology. Background technique [0002] Oxygen is one of the most important chemical raw materials in the world, widely used in chemical industry, metallurgy, national defense, environmental protection, medical treatment and other fields. In 2009, the global demand for oxygen was 85 billion cubic meters, ranking second in the world's gas production, accounting for about 30% of the gas production market share, and growing at a rate of about 6% per year. Air separation is currently the most important oxygen preparation technology including: cryogenic rectification, pressure swing adsorption and membrane separation. Among them, cryogenic rectification technology is the most common and mature technology for air separation to produce oxy...

AI Technical Summary

Problems solved by technology

However, the highest purity of oxygen produced is about 90-93%, the output is low, and the energy consumption is high

Membrane separation technology emerged in the 1980s. It has the advantages of

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