苯酐生产过程反应余热回收利用技术改造研究

Study on Technical Transformation of Recovery and Utilization of Reaction Waste Heat in the Production of Phthalic Anhydride

基于苯酐生产特点,熔盐作为载体,将反应所产生的热量带出,与水进行热交换,形成不同压力等级的蒸汽,并借助管道及其他设施,把这些蒸汽送至不同的生产装置,从而使这些蒸汽得到利用;而装置产生的过热蒸汽可以驱动汽轮机组,代替电拖风机进行工作,大大节省的电力资源;与此同时,对于蒸汽经过换热使用后形成的凝液,可以进行回收闪蒸形成低一等级的蒸汽,再将这些蒸汽输送到管网进行使用,使得蒸汽得到二次利用;通过技术改造,极大的减少蒸汽损耗,提高蒸汽的使用效率,降低生产费用,获得可观的经济效益。

Based on the production characteristics of phthalic anhydride,molten salt is used as the carrier to carry out heat exchange with water to form steam of different pressure levels.With the help of pipelines and other facilities,the steam is sent to different production units,so that the steam can be used.The superheated steam generated by the device can drive the steam turbine unit instead of the electric towing fan,which greatly saves the power resources.At the same time,the condensate formed by steam after heat exchange can be recovered and flashed to form a lower level of steam and then these steam can be transported to the pipe network for use,so that the steam can be reused.Through technical transformation,the steam loss can be greatly reduced,the use efficiency of steam can be improved,the production cost can be reduced and considerable economic benefits can be obtained.