焦炉烟道气余热负压蒸氨成套装置技术

分析了传统蒸汽蒸氨技术的不足,介绍了近年来导热油蒸氨、管式炉蒸氨、负压蒸氨技术的进展情况,研究开发了焦炉烟道气余热负压蒸氨成套装置技术,将热管技术、焦炉烟气-剩余氨水换热器技术成功应用于80万t/a焦炭生产系统,焦化废水处理成本降低40%,蒸氨废水量减少25%,提高了处理水水质,为焦化废水实现资源化利用和零排放创造了有利条件。

Development and application of ammonia stripping and its unit under negative pressure from waste flue gas heat

This paper analyzed the disadvantages of conventional ammonia stripping process by steam and described the improvement of ammonia stripping by heat transfer oil, by tubular furnace and by negative pressure from waste flue gas heat. The technologies of heat pipe, coke oven waste flue gas and coal water heat exchanger are successfully unitized for 800 000t/a coke production system, by which the waste water treatment cost can be reduced by 40% , stilled water amount can be reduced by 25% ,the quality of treated water can be improved so that it＇s beneficial to the waste water reutiliza- tion and zero discharge of waste water.