To increase production capacity of nitriding ferroalloys, reducing production cost, PSA nitrogen plant is selected.

提高氮化合金的生产能力，降低生产成本，采用了PSA制氮系统。

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The use of this type boiler is a good idea for energy saving and environment protection to the nitrogen plant using coal as a feed.

说明这种类型的锅炉对以煤为原料制气的氮肥厂是一个综合利用的好项目，既节能又利于三废冶理。

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This paper gives you an example to analyze the reason on explosion of carbon deposit in nitrogen - hydrogen compressor system in mid - sized nitrogen plant.

以某厂实例分析了中型氮肥厂氮氢压缩机系统积碳爆炸的原因，提出了预防对策。

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These worries resurfaced on April 7th when TEPCO started to inject nitrogen into one of the plant's six stricken reactors.

ECONOMIST: A spreading cloud of economic and human costs

In the 1980s nitrogen controls were placed on industrial plant and vehicles, This has led to a cut in emissions of 30%, despite an increase in traffic and economic activity.

BBC: Nitrogen pollution 'costs EU up to ?280bn a year'

The Paradise plant in Kentucky is the dirtiest for nitrogen oxide pollution.

CNN: Nature - America's most wanted: Power plants urged to clean up their act