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目前,在小氮肥行业,降低吨氨电耗还是有潜力可挖的。就年产7500吨合成氨装置而言,合成工段合成塔出口气的温度为115℃,压力为154.5大气压。通过热量衡标,每小时要被冷却水带走的热量就达61万大卡。而合成工段循环机出口的气体所需消耗的冷量为每小时10～15万大卡。这些冷量是由55瓩电动机带动压缩式冰机而获得的。如果能将合成塔出口气的余热用氨吸收制冷代替冰机压缩制冷,就有希望降低吨氨电耗。
At present, in the small nitrogen fertilizer industry, there is potential to reduce the consumption of electricity per tonne of ammonia. For an annual output of 7500 tons of ammonia plant, the synthesis section of the exit gas temperature of 115 ° C, the pressure of 154.5 atm. Calorie through the heat, every hour to be taken away by the cooling water amounted to 610,000 calories. The synthesis section of the recycling machine gas consumption of the required cooling capacity of 10 to 150,000 kilocalories per hour. These are obtained by a 55 瓩 motor-driven compression ice machine. If we can export the gas synthesis tower exhaust heat absorption refrigeration instead of ice machine refrigeration compression, there is hope to reduce tons of ammonia consumption.