摘要
综述了苯、甲苯、二甲苯(BTX)分离的普通流程、热泵流程(包括常压直接序列热泵流程、常压间接序列热泵流程)和热集成流程。提出了新的BTX热耦分离流程,它由预分塔和主塔构成,通过预分塔使轻、重关键组分分离,主塔则对预分产物进一步分离,得到目的产品;并提出相应热耦流程的模拟方法。使用流程模拟软件对常压直接序列热泵流程、常压间接序列热泵流程、热集成流程、热耦合流程进行了全流程模拟设计,在模拟数据的基础上,对各流程进行了有效能分析。常压热泵流程由于压缩机功耗大,损在109 GJ/h左右;热集成流程换热物流温位匹配合理,泵及压缩机损也小,在90.1 GJ/h左右;热耦合流程再沸炉内传热损较大,主塔塔顶汽不能用于加热工艺物流,冷却损大,在103 GJ/h左右。最终确定热集成流程是BTX分离过程的能量集成最优流程。
The common process, heat pump process （including atmospheric direct sequence heat pump process, atmospheric indirect sequence heat process） and heat integration process for BTX separation process have been analyzed. A new separation process with BTX Petlyuk column has been proposed, which consists of prefraetionator and the main fractionator tower. The critical light and heavy components are separated by prefractionator, and the preliminary fraetionation products are further separated in the main fraetionator tower to get the objective products. The simulation methods of Petlyuk column is recommended. The atmospheric direct sequence heat pump process, atmospheric indirect sequences heat process, heat integration process and petlyuk column process are simulated and designed by process simulation software. The effective energy of each process is analyzed on the basis of simulation data. Due to the large power consumption of compressor, the exergy loss of atmospheric heat pump process is about 109 GJ/h ; The temperature of heat transfer streams of heat integration process match well, and the loss of pump pressure exergy is small i. e. about 90.1 GJ/h ; The exergy loss of heat transfer is higher in reboiler furnace. The overhead effluent of fraetionator can not be used for heating process streams and the cooling exergy loss is high. The exergy loss of petlyuk column process is about 103 GJ/h. It is finally confirmed that the heat integration process is the most optimal energy integration process for BTX separation.
出处
《炼油技术与工程》
CAS
2013年第11期60-64,共5页
Petroleum Refinery Engineering
关键词
BTX分离
能量集成
有效能
热耦精馏
[火用]损
BTX separation, energy integration, effective energy, thermally coupled distillation, exergy loss
