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本文介绍了凤山化工厂直接法生产硝酸钠和亚硝酸钠过程中,蒸发、结晶工序的工艺设备改造和一次蒸汽的消耗情况,以及实际生产中回收利用一次蒸汽冷凝液和综合利用余热资源(高温氮混合气和蒸发工序的废热蒸汽)的情况。节能改造取得了可观的经济和社会效益。
This paper introduces the process equipment reform and primary steam consumption in the process of evaporation and crystallization during the direct production of sodium nitrate and sodium nitrite in Fengshan Chemical Plant and the recovery and utilization of primary steam condensate and comprehensive utilization of waste heat resources in actual production High temperature nitrogen mixture and waste heat steam in the evaporation process). Energy-saving transformation has made considerable economic and social benefits.