Is high-pressure nitrogen supplied by a nitrogen compressor or by an air separation liquid nitrogen pump?
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I’m facing a problem while working on a project: for the high-pressure nitrogen used in gasification, should it be generated by using a high-pressure nitrogen compressor, or should a small liquid nitrogen pump be employed as part of the air separation unit to supply that nitrogen? What are everyone's thoughts?
Some say that for large projects recently, liquid nitrogen pumps are recommended for supplying high-pressure nitrogen, but I asked China Coal Yulin, and they also use their own methods to generate pressure. Which marine friend knows of a company that uses liquid nitrogen pumps for pressurization?
Air separation supplies low-pressure nitrogen; the gas is pressurized to 12 megapascals by a nitrogen compressor
Do you know how it’s being used there?
Use an air separation liquid nitrogen pump – it has low energy consumption and requires little maintenance; it’s now quite mature
We use an air separation liquid nitrogen pump for pressurization, and the results are quite good
To determine whether the liquid nitrogen pump used in air separation provides good pressurization, it is necessary to consider the overall efficiency; in my opinion, it is more economical to use a compressor for vaporization to achieve a pressure of 12 megapascals.
Not bad; play once on summer nights, and at most once per shift in other seasons
It is recommended to use an air-separated liquid nitrogen pump for pressurization, as it has a low failure rate and high efficiency. Our unit was originally designed to use a two-stage metal diaphragm nitrogen compressor provided by Beijing Jingcheng Environmental Protection Co., Ltd., in order to increase the pressure of 5 kilograms of low-pressure nitrogen to 12 megapascals. However, this type of diaphragm nitrogen compressor had a very high failure rate; on several occasions it prevented us from starting or stopping the equipment properly. Finally, two liquid nitrogen pumps were installed through technical upgrades, and they have been performing excellently ever since! :P