Products
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Liquid Air Separation Unit
The products of the all-liquid air separation unit can be one or more of liquid oxygen, liquid nitrogen and liquid argon, and its principle is as follows:
After purification, the air enters the cold box, and in the main heat exchanger, it exchanges heat with the reflux gas to reach a near liquefaction temperature and enters the lower column, where the air is preliminarily separated into nitrogen and oxygen-rich liquid air, the top nitrogen is condensed into liquid nitrogen in the condensing evaporator, and the liquid oxygen on the other side is evaporated. Part of the liquid nitrogen is used as the reflux liquid of the lower column, and part of it is supercooled, and after throttling, it is sent to the top of the upper column as the reflux liquid of the upper column, and the other part is recovered as a product. -
Alkaline Water Electrolysis Hydrogen Generator
The Alkaline Water Electrolysis Hydrogen Generator consists of an electrolyser, a gas-liquid treatment unit, a hydrogen purification system, a variable pressure rectifier, a low voltage distribution cabinet, an automatic control cabinet and water and alkali distribution equipment.
The unit operates on the following principle: using a 30% potassium hydroxide solution as the electrolyte, direct current causes the cathode and anode in the alkaline electrolyzer to decompose water into hydrogen and oxygen. The resulting gases and electrolyte flow out of the electrolyzer. The electrolyte is first removed by gravity separation in the gas-liquid separator. The gases then undergo deoxidation and drying processes in the purification system to produce hydrogen with a purity of at least 99.999%.
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Waste Acid Recovery Unit
The Waste Acid Recovery System (primarily hydrofluoric acid) utilises the different volatilities of the waste acid components. Through a double column atmospheric pressure continuous distillation process with precise control systems, the entire recovery process operates in a closed, automatic system with a high safety factor, achieving a high recovery rate.
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Nitrogen Generator By Pressure Swing Adsorption (PSA)
Nitrogen generator by pressure swing adsorption is the use of a carbon molecular sieve adsorbent processed from high quality coal, coconut shell or epoxy resin under pressurized conditions, the diffusion speed of oxygen and nitrogen in the air into the carbon molecular sieve hole, so as to separate the oxygen and nitrogen in the air. Compared with nitrogen molecules, oxygen molecules first diffuse into the holes of carbon molecular sieve adsorbent, and the nitrogen that does not diffuse into the holes of carbon molecular sieve adsorbent can be used as the product output of gas for users.
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VPSA Oxygenerator
The VPSA Oxygen Generator is a pressurized adsorption and vacuum extraction oxygen generator. Air enters the adsorption bed after compression. A special molecular sieve selectively adsorbs nitrogen, carbon dioxide and water from the air. The molecular sieve is then desorbed under vacuum conditions, recycling high purity oxygen (90-93%). VPSA has a low energy consumption, which decreases with increasing plant size.
Shanghai LifenGas VPSA oxygen generators are available in a wide range of models. A single generator can produce 100-10,000 Nm³/h of oxygen with 80-93% purity. Shanghai LifenGas has extensive experience in the design and manufacture of radial adsorption columns, providing a solid foundation for large-scale plants. -
Krypton Extraction Equipment
Rare gases such as krypton and xenon are highly valuable for many applications, but their low concentration in air makes direct extraction a challenge. Our company has developed krypton-xenon purification equipment based on cryogenic distillation principles used in large-scale air separation. The process involves pressurising and transporting liquid oxygen containing trace amounts of krypton-xenon via a cryogenic liquid oxygen pump to a fractionation column for adsorption and rectification. This produces by-product liquid oxygen from the upper-middle section of the column, which can be re-used as required, while a concentrated crude krypton-xenon solution is produced at the bottom of the column.
Our refining system, independently developed by Shanghai LifenGas Co., Ltd., features proprietary technology including pressurised evaporation, methane removal, oxygen removal, krypton-xenon purification, filling and control systems. This krypton-xenon refining system features low energy consumption and high extraction rates, with the core technology leading the Chinese market.
