毕业设计（论文）-以提溴废液为原料年产12万吨氯化镁车间工艺设计精选.doc

以提溴废液为原料年产12万吨氯化镁车间工艺设计 the process design of magnesium chloride with annual output of tons using the bromine effluent liquid as raw material 摘　　要 氯化镁是一种重要的化工原料，随着科学的进步及世界经济的飞速发展，人们对氯化镁产品的精细化程度也提出了越来越高的要求。我国是世界产镁大国，也是用镁大户，但不是产镁强国。其主要原因是我国的产品粗品多，精品少。一方面是低级原料的大量出口，另一方面又是大量精品的进口，其进口价是出口价的几倍，甚至高达几十倍。因此，设计了一个年产10万吨的氯化镁生产工艺车间。 本设计说明书对氯化镁车间的主要生产流程，设备的选型，总平立面布置及环境保护等各方面进行较全面、合理的安排，其重点是对生产流程中的主要设备进行了详细的说明。氯化镁的生产主要包括：预热、蒸发、保温沉降、制片、包装等过程，而其中的蒸发、保温沉降、制片又是其中的重点工序，蒸发采用强制循环蒸发器，这种蒸发器的优点是靠外力循环，循环速度大，一般可达1.5～3.5m/s；靠泵循环，加热蒸气的压力对循环速度没有影响，操作稳定；生产强度大，适合于粘度大而又有晶体析出的料液。保温沉降主要是控制好温度，是沉降器内的温度保持在105℃以上。采用这样的流程，其氯化镁质量完全符合工业用氯化镁企业标准。由于所选的各种设备比较齐全，工艺先进，从而大大地提高了生产效率。 关键词：氯化镁； 车间设计； 工艺流程 ABSTRACT Magnesium chloride is a important chemical raw material, with the improvement of science and quick development of international economy, people require more finer magnesium chloride products. Our country is a big magnesium producer, and a big magnesium consumer, but not a strong magnesium producer. The main reason is, most of our products is grossness, few of them is fine products. On one hand , we export huge raw material, on the other hand, we are a big fine- magnesium chloride importer, the price of imported products is times or several tens of exported ones. So, we design a magnesium chloride work shop which with eighty ton annual output. This design instruction has a comprehensive and reasonable arrangement about main production flow, equipment selection, over all plane and elevation laying, and environmental protection. It emphasizes the detail instruction of important equipment in the production flow. Production of magnesium chloride includes preheating, evaporating, insulating lagging, palletizing, packing, ect. Evaporating, insulating lagging, palletizing are important procedure. We use forced circulation evaporator, advantage of this evaporator is it circulating by external force, can have a 1.5~3.5 m/s high speed. Circulating by pump, pressure of heating stream will not influence cir