Process description of liquid air separation plant

After impurity removal, air is taken by compressor and compressed to ~1.1MPa. After cooling down, harmful components, such as moisture, CO₂, C₂H₂ are removed by purifying system.
After purification, compressed air is cooled down by the main heat exchanger and cold refrigerator, and sent to rectification column for rectification. Through sub-cooler, liquid air, liquid waste nitrogen and liquid pure nitrogen are sent to upper column for secondary rectification. In upper column, liquid oxygen at 99.6% is obtained at bottom, which is delivered out of cold box via sub-cooling as product.
Waste nitrogen is drawn from top of upper column. Through heat exchanger, it is expanded to provide coldness to the whole system. After warming up, it is delivered out of cold box and divided into 2 streams. First stream goes to purifying system for regeneration of molecular sieve. Second stream is delivered to pre-cooling system to cool down the cooling water.
While third stream of waste nitrogen delivered out of cold box is compressed by recycle compressor and booster of turbine. Afterwards, it goes into cold box and is cooled down by heat exchanger. Cool gas is expanded subsequently to supply coldness to whole system. After expansion, it is warmed up in heat exchanger and goes for another round of circulation.
The production of argon works on hydrogen-free rectification process specified as following described: Liquid argon fraction is drawn out from the upper column into crude argon column and pure argon column, where liquid argon product is got through rectification.


(source:http://www.airseparation-plant.cn/tag/air-separation-plant-manufacturer/)

Process description of gas air separation plant

Eliminated from mechanical impurity by the air filter, the required amount of process air is compressed by centrifugal air compressor to ~0.5MPa. Afterwards, it goes into water-cooling tower for cleaning and pre-cooling. The removal of harmful components, such as moisture, CO₂, C₂H₂ are carried out by activated alumina and molecule sieve in molecule sieve purifier, which will automatically alternate.
After purification, small stream of compressed air is compressed secondarily by booster end of turbine. Through cooling via water cooler, it goes into main heat exchanger for secondary cooling. Then it is drawn from middle part of heat exchanger to expander of turbine. Afterwards, expanded air is sent to upper column for rectification.
After purification, large stream of compressed air is cooled down to its dew point temperature in main heat exchanger and goes to lower column. Through primary rectification, liquid nitrogen is got the top of lower column, and liquid air is got at the bottom. Through sub-cooling via liquid air &liquid nitrogen sub-cooler, liquid nitrogen and liquid air are sent into respective position of upper column. Through secondary rectification, gas oxygen is got at the bottom of upper column. Through warming up to ambient temperature in sub-cooler and main heat exchanger; gas oxygen is delivered out of cold box into oxygen pipe as product. The waste nitrogen got at the top part of upper column is warmed up through sub-cooler and main heat exchanger and delivered out of cold box. One stream goes to purifier for regeneration of molecular sieve; the other stream goes to water-cooling tower of pre-cooling system, to cool down the recycle water.
The production of argon works on hydrogen-free rectification process specified as following described: Liquid argon fraction is drawn out from the upper column into crude argon column and pure argon column, where liquid argon product is got through rectification.

(source:http://www.airseparation-plant.cn/process-description-of-gas-air-separation-plant/)

Air separation manufacturing in workshop of Suzhou Xinglu

Suzhou Xinglu Air Separation Plant Science and Technology Development Co.,Ltd. focuses on the research&development, design and manufacture of cryogenic technical field. The video will show you the air separation manufacturing in workshop.

(source:http://www.airseparation-plant.cn/air-separation-manufacturing-in-workshop-of-suzhou-xinglu/(

Various usages of Hydrogen

1.Petrochemical industry production: as the raw material gas of hydrogenation of ammonia, methanol, petroleum refining, etc. As well as  organic materials of organic hydrogenation.
2.Metallurgical industry: it is widely used in the production and processing of tungsten, molybdenum and titanium just as reduction gas and protection. And it used in production and rolling of thin steel plate, strip steel strip and silicon steel sheet;Production of precision alloy, powder metallurgy material.
3.Electronics industry: mainly used in the production of electronic materials, semiconductor integrated circuits and electro-vacuum main devices.
4.Building materials and light industrial production: as protective gas and combustion gas, such as quartz glass and artificial gemstone production, hydrogen monoxide is used to obtain high temperature;In float glass production,hydrogen is used for protect gas and so on.
5.Power industry: as a coolant for generator sets.
6.Balloons and airbags: as filling gas.
7.Liquid hydrogen is an important liquid fuel for aerospace and rocket.
8.Make fuel cells with hydrogen.
9.It has come true that we can use hydrogen fuel in cars and dispose of chemical waste products



(source:http://www.airseparation-plant.cn/various-usages-of-hydrogen/)