Integrated type preparation method and preparing and supplying device for medical care gas

Abstract

The invention relates to the technical field of oxygen preparation through the cryogenic process, and discloses an integrated type preparation method and preparing and supplying device for medical care gas. The preparing and supplying device comprises a hot end system, a cold end system and a backup system. The hot end system is used for air filtration, cooling, drying and purification. The gas treated through the hot end is divided into four branches to enter the cold end system and the backup system. The cold end system comprises a high-pressure tower and a low-pressure tower. Liquid oxygen prepared by the low-pressure tower mainly comes from liquid air rich in oxygen in the high-pressure tower, and thus pure oxygen reaching medical standards is prepared. By installing an oxygen buffer tank and increasing the operation pressure, the different demands for gas consumption during day and night of a hospital can be met when the device is operated stably and continuously at rated flow. By adoption of the device, liquid oxygen, liquid nitrogen, oxygen, nitrogen and medical dry air can be obtained simultaneously. A liquid oxygen storage tank and a liquid nitrogen storage tank are capable of maintaining the operation of a gas pipeline under the condition that the device is stopped. The preparing and supplying device saves energy, is simple in operation and stable in control.

Description

technical field [0001] The invention belongs to the technical field of producing oxygen by a cryogenic method, and in particular relates to an integrated preparation method of medical and health care gas and a preparation and supply device thereof. Background technique [0002] The cryogenic method is to first compress, cool, purify and absorb water, carbon dioxide and hydrocarbons in the air, exchange heat with the cold stream in the heat exchanger and liquefy the air, using the boiling points of oxygen and nitrogen components The difference between oxygen and nitrogen is realized in the rectification tower, which is the air rectification method. [0003] At present, large-scale oxygen production in the industry generally adopts the cryogenic method. The liquid oxygen produced by a large cryogenic device is transported by a tanker to a low-temperature pressure storage tank installed in a hospital, and is vaporized by an empty bath vaporizer for use in the hospital. The dis...

AI Technical Summary

Problems solved by technology

Even if extreme measures are taken, the maximum oxygen purity can only reach 95%, which cannot meet the 99.5% purity requirement of medical oxygen, so it is only suitable for occasions that do not require high oxygen purity, and the unit consumption of oxygen production is relatively high, about 1.5 ~ 1.8kWh / Nm3

And cannot supply other medical gases at the same time, such as nitrogen, dry compressed air, liquid oxygen, liquid nitrogen, etc.

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