有效提高水钢焦化浓氨水浓度的方法

Method for Effectively Increasing Concentration of Coking Ammonia Water in Shuigang

通常采用水洗氨工艺的焦化厂蒸氨塔顶温度控制在100℃-102℃之间．蒸氨塔顶压力10kPa-25kPa之间。生产出的浓氨水浓度在10％-13％（质量浓度）左右，仅能勉强满足焦化自身煤气脱硫使用，仍有部分氨气富余。目前水泥厂烟气脱硫脱硝需要使用浓度为18％（质量浓度）以上的浓氨水．焦化生产的浓氨水浓度若能达到18％以上不仅减少了富余氨气的处理问题还能增加销售收入。

Generally, the temperature and pressure at the top of ammonia still equipped with water washing ammonia process in eoking plant are 100℃-102℃ and 10-15KPa respectively. Concentra- tion of strong ammonia water arising from coking is 10-13 mass%. The eoncentration barely meets demand for coal gas desulfurization in our own company. There is some surplus ammonia water. Re- cently, cement plants need ammonia water with 18 mass% ammonia for desulfurization and denitrification of flue gas. If concentration of ammonia water from coking are higher than 18 mass%, not only the problem about surplus ammonia treatment is solved, but aLso sales income will increase due to surplus ammonia sale.