通过对工艺信息实质内容的深入分析,提出一种能全面描述和表达工艺信息的三维工艺模型(Manufacturing process model,MPM),该模型具有工艺过程信息的几何演进性和多视角性特点。模型通过定义MPM三元组,确立了工艺信息的过程性结构关系,...通过对工艺信息实质内容的深入分析,提出一种能全面描述和表达工艺信息的三维工艺模型(Manufacturing process model,MPM),该模型具有工艺过程信息的几何演进性和多视角性特点。模型通过定义MPM三元组,确立了工艺信息的过程性结构关系,可完整表达工艺信息的内在规律,有利于数字化工艺信息的产生与优化。同时,从便于工艺设计等下游后续过程使用工艺信息的角度,提出包括流、动态场景和快照表达模型在内的三维工艺模型的数字化多视角工艺信息表达框架(Manufacturing process as stream and snapshot,MPASS)。其中,流表达模型以制造活动过程之间的关系为组织形式对工艺活动的信息进行表达;动态场景表达则是从不同的对象视角进行投影,以灵活的形式对工艺信息进行组织和查看;快照表达利用静态对象几何和增量的方式,表达动态过程某一时间点的状态值和相关性。不同的表达数据可用于不同的后续制造与管理过程。展开更多
The aim of this paper was preliminary design of the process for low-temperature coal tar hydrocrackmg m supercritical gasoline based on Aspen Plus with the concept of energy self-sustainability. In order to ensure the...The aim of this paper was preliminary design of the process for low-temperature coal tar hydrocrackmg m supercritical gasoline based on Aspen Plus with the concept of energy self-sustainability. In order to ensure the correct- ness and accuracy of the simulation, we did the following tasks： selecting reasonable model compounds for low-tem- perature coal tar; describing the nature of products gasoline and diesel accurately; and confirming the proper property study method for each block by means of experience and trial. The purpose of energy self-sustainability could be pos- sibly achieved, on one hand, by using hot stream to preheat cold stream and achieving temperature control of streams, and on the other hand, by utilizing gas （byproduct of the coal tar hydrocracking） combustion reaction to provide energy. Results showed that the whole process could provide a positive net power of about 609 kW-h for processing the low- temperature coal tar with a flowrate of 2 268 kg/h. The total heat recovery amounted to 2 229 kW-h, among which 845 kW＇h was obtained from the gas combustion reaction, and 1 116 kW＇h was provided by the reactor＇s outlet stream, with the rest furnished by hot streams of the products gasoline, diesel and residue. In addition, the process flow sheet could achieve products separation well, and specifically the purity of product gasoline and diesel reached 97.2% and 100%, respectively.展开更多
文摘通过对工艺信息实质内容的深入分析,提出一种能全面描述和表达工艺信息的三维工艺模型(Manufacturing process model,MPM),该模型具有工艺过程信息的几何演进性和多视角性特点。模型通过定义MPM三元组,确立了工艺信息的过程性结构关系,可完整表达工艺信息的内在规律,有利于数字化工艺信息的产生与优化。同时,从便于工艺设计等下游后续过程使用工艺信息的角度,提出包括流、动态场景和快照表达模型在内的三维工艺模型的数字化多视角工艺信息表达框架(Manufacturing process as stream and snapshot,MPASS)。其中,流表达模型以制造活动过程之间的关系为组织形式对工艺活动的信息进行表达;动态场景表达则是从不同的对象视角进行投影,以灵活的形式对工艺信息进行组织和查看;快照表达利用静态对象几何和增量的方式,表达动态过程某一时间点的状态值和相关性。不同的表达数据可用于不同的后续制造与管理过程。
基金the financial support from the National Natural Science Foundation of China(No.2117619)the Shaanxi Province Major Project of Innovation of Science and Technology(No.2008zkc03205,No.2011KTZB03-03-01)
文摘The aim of this paper was preliminary design of the process for low-temperature coal tar hydrocrackmg m supercritical gasoline based on Aspen Plus with the concept of energy self-sustainability. In order to ensure the correct- ness and accuracy of the simulation, we did the following tasks： selecting reasonable model compounds for low-tem- perature coal tar; describing the nature of products gasoline and diesel accurately; and confirming the proper property study method for each block by means of experience and trial. The purpose of energy self-sustainability could be pos- sibly achieved, on one hand, by using hot stream to preheat cold stream and achieving temperature control of streams, and on the other hand, by utilizing gas （byproduct of the coal tar hydrocracking） combustion reaction to provide energy. Results showed that the whole process could provide a positive net power of about 609 kW-h for processing the low- temperature coal tar with a flowrate of 2 268 kg/h. The total heat recovery amounted to 2 229 kW-h, among which 845 kW＇h was obtained from the gas combustion reaction, and 1 116 kW＇h was provided by the reactor＇s outlet stream, with the rest furnished by hot streams of the products gasoline, diesel and residue. In addition, the process flow sheet could achieve products separation well, and specifically the purity of product gasoline and diesel reached 97.2% and 100%, respectively.
