An integrated system and method for pressure swing adsorption oxygen production and oxygen purification

Abstract

The invention discloses a pressure swing adsorption oxygen production and oxygen purification integrated system which mainly comprises a compressed air pipeline, a pressure swing adsorption oxygen producer, a buffer tank, an oxygen purification host and an oxygen storage tank, wherein the compressed air pipeline is communicated with the inlet of the pressure swing adsorption oxygen producer; the outlet of the pressure swing adsorption oxygen producer is communicated with the buffer tank through a pipeline; the buffer tank is communicated with the inlet of the oxygen purification host through a pipeline; the outlet of the oxygen purification host is communicated with the oxygen storage tank through a pipeline; the oxygen storage tank is communicated with the buffer tank through a pipeline and is also communicated with a return tank through a pipeline; and a valve for controlling connection and disconnection is arranged on each pipeline. The invention further provides a method for producing and purifying oxygen by utilizing the integrated system. The system has the beneficial effects that exhaust discharged by the oxygen purification host is recovered by the return tank and input into the pressure swing adsorption oxygen producer to serve as resurgent gases, so that the oxygen recovery rate of the whole system is greatly improved, the regeneration effect is improved, and the oxygen purity is improved.

Description

technical field [0001] The invention relates to the field of oxygen production equipment and methods, in particular to an integrated system and method for pressure swing adsorption oxygen production and oxygen purification. Background technique [0002] PSA oxygen production technology is a technology for air separation to produce oxygen, which mainly depends on the difference in the adsorption capacity of oxygen molecular sieves (the key components of PSA oxygen production equipment) to the various components of gas in the air under different pressures. To achieve the purpose of separating each component gas. Pressure swing adsorption oxygen production equipment is widely used in chemical industry, electronics, medical treatment, metallurgy, environmental treatment and other industries. Due to the characteristics of molecular sieves for oxygen production and the limitation of adsorption principle, its adsorption capacity for inert gases in the air is very low. The oxygen p...

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Problems solved by technology

When producing general oxygen (purity 93%), the pressure swing adsorption oxygen production equipment needs regeneration gas of about 200% of the oxygen output; and except for a part of the regeneration gas remaining in the adsorption tower, the rest must be vented; at the same time, the oxygen purification host Exhaust gas and exhaust gas must also be emptied and not utilized, which leads to excessive consumption of regeneration gas for the entire set of equipment, seriously reducing the oxygen recovery rate of the entire set of equipment (the oxygen recovery rate is only about 30%), resulting in high energy consumption of the equipment It will also affect the improvement of the oxygen purity of the equipment, and it is generally difficult to reach more than 99.5%.

At the same time, due to the failure to take certain measures for the start-up, there is no recovery pipeline and anti-charging pipeline, the start-up time of the whole set of equipment is very long, usually about 3 hours, which seriously affects the use of the equipment

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