煤化工专业毕业论文--饱和器法生产硫酸铵回收氨.doc

摘要
煤化工利用生产技术中,炼焦是应用最早的工艺,并且至今仍然是煤化工工业的重要组成部分。炼焦主要产品是生产炼铁用焦炭,同时生产焦炉煤气、苯、萘、蒽、沥青以及碳素材料等产品。
在炼焦过程中,%~%与芳香烃发生化合反应生产吡啶盐基。其生成量主要取决于煤中氮含量及炼焦温度。~ g/m3,其中轻吡啶盐基约占75%~85%。~ g/m3,即回收率达90%~95%。
本设计分别采用饱和器法生产硫酸铵回收氨,中和器法提取粗轻吡啶。对于饱和器法生产硫酸铵的工艺,煤气经鼓风机和电捕焦油器之后进入预热器,然后进入饱和器。煤气穿过饱和器在除酸器分离出液滴后,去脱硫或粗苯回收段。结晶母液用泵从饱和器底部送至结晶槽,沉淀出结晶后满流母液回到饱和器。结晶经分离器,干燥器成为硫酸铵成品。对于中和器法提取粗轻吡啶,母液从结晶槽回流入沉淀槽,同蒸氨分凝器来的氨气一起进入中和器。分解出的吡啶蒸汽等进入冷却器,经油水分离器后上层粗吡啶进入计量槽,放入储槽。下层的分离水返回中和器。
;;%;带入饱和器总水量1408kg/h;;母液最低温度54℃;煤气预热温度 ℃;饱和器中央煤气管直径1530 mm;煤气进口管直径1090 mm;饱和器直径5000mm;饱和器高度7740 mm;除酸器进口管外径1660 mm;除酸器直径2720 mm;除酸器出口管在器内部分高度4150 mm;㎡;干燥器直径1000 mm;干燥器溢流口高度388 mm;;;%;中和器直径1220 mm;中和器筒体高度1220 mm;中和器总高1775 mm;㎡;
关键词:氮;氨;硫酸;饱和器;母液;硫酸铵:结晶:中和器;粗轻吡啶
Abstract
Use of coal chemical production technology, the coking process is applied first, and the coal chemical industry is still an important part. Coking main product is the production of iron using coke, while production of coke oven gas, benzene, naphthalene, anthracene, carbon materials, asphalt and other products.
In the coking process, coal nitrogen with % to % of ammonia production with the aromatic pyridine base. Its amount depends on the nitrogen content of coal and coke temperature. Usually early in the gas after the gas cooler containing pyridine base is about ~ g/m3, which accounts for about 75% light pyridinium ~ 85%. Recycled content of gas in the pyridine base is about ~ g/m3, the recovery rate of 90% to 95%.
The design of devices were used to the production of ammonium sulfate saturation recovery of ammonia, medium and light crude pyridine extraction device. Saturated ammonium sulfate for the production of process devices, gas and electricity by the blower after the tar into the preheater, then into the saturator. Saturated gas throug