提出了一种基于塔总组合曲线(column grand composite curve,CGCC)确定分馏塔合理进料位置的方法——将分馏塔分别视为精馏塔与提馏塔进行物料与能量衡算,构造出与CGCC部分重合的两条相交的全塔精馏线和全塔提馏线,通过分析CGCC进料点...提出了一种基于塔总组合曲线(column grand composite curve,CGCC)确定分馏塔合理进料位置的方法——将分馏塔分别视为精馏塔与提馏塔进行物料与能量衡算,构造出与CGCC部分重合的两条相交的全塔精馏线和全塔提馏线,通过分析CGCC进料点与两曲线交点的位置关系,或定量比较两曲线上各塔板焓差大小,可以判断进料位置的合理性。研究发现,与非进料塔板相比,若CGCC进料点最靠近两曲线交点以及两曲线上进料塔板焓差取得最小值,则该进料位置最佳。两个二组分塔和一个多组分塔的应用实例表明,本文给出方法确定的分馏塔合理进料位置,与其它基于节能考虑确定分馏塔合理进料位置的方法和技术得到的计算结果基本相同。展开更多
The 10th Chinese Gastric Cancer Congress （CGCC） and the 3rd Sunlight Great Wall Cancer Academic Conference, hosted by Chinese Anti-Cancer Association and Beijing Cancer Hospital, was held in Beijing International Co...The 10th Chinese Gastric Cancer Congress （CGCC） and the 3rd Sunlight Great Wall Cancer Academic Conference, hosted by Chinese Anti-Cancer Association and Beijing Cancer Hospital, was held in Beijing International Conference Center on June 27-28th, 2015. The congress has continued the theme of ＂Standardization, Fusion,展开更多
A novel heat-integrated distillation scheme on pilot scale for producing C5 foaming agent, a mixture of isopentane and pentane in a certain proportion, was proposed with the aid of process simulation. Compared with th...A novel heat-integrated distillation scheme on pilot scale for producing C5 foaming agent, a mixture of isopentane and pentane in a certain proportion, was proposed with the aid of process simulation. Compared with the conventional distillation scheme, C5 foaming agent was directly separated at the top of the original isopentane or pentane column in the novel scheme, instead of first refining the two isomerides to high purities and then mixing them into final products. This improvement reduced the difficulty of the separation and avoided meaningless exergy loss caused by re-mixing, which finally contributed to an energy-efficient design by a big margin. Moreover, the column grand composite curves(CGCCs)were used to modify all distillation columns, indicating that there is potential to improve the energy efficiency further. Therefore, double-effect, or heat-integrated distillation was also adopted. Energy and exergy analyses were then conducted to evaluate the effectiveness of the proposed scheme for the purpose of energy saving. The simulation results of the conventional distillation scheme were in agreement with its on-site counterpart. Analyses showed that the novel heat-integrated scheme reduced hot utility by 27.12%,, cold utility by 24.49%,, and total exergy loss by 23.95%,.展开更多
Chairman Hu Wei,Ladies and gentlemen,Dear friends,Good evening!It gives me great pleasure to attend the CGCC Annual Gala again and get together with friends old and new.In the past year,CGCC stayed committed againstal...Chairman Hu Wei,Ladies and gentlemen,Dear friends,Good evening!It gives me great pleasure to attend the CGCC Annual Gala again and get together with friends old and new.In the past year,CGCC stayed committed againstall odds to serving Chinese-invested enterprises in the United States and building more bridges for business exchanges between our two countries,and effectively promoted bilateral mutually beneficial cooperation.展开更多
文摘提出了一种基于塔总组合曲线(column grand composite curve,CGCC)确定分馏塔合理进料位置的方法——将分馏塔分别视为精馏塔与提馏塔进行物料与能量衡算,构造出与CGCC部分重合的两条相交的全塔精馏线和全塔提馏线,通过分析CGCC进料点与两曲线交点的位置关系,或定量比较两曲线上各塔板焓差大小,可以判断进料位置的合理性。研究发现,与非进料塔板相比,若CGCC进料点最靠近两曲线交点以及两曲线上进料塔板焓差取得最小值,则该进料位置最佳。两个二组分塔和一个多组分塔的应用实例表明,本文给出方法确定的分馏塔合理进料位置,与其它基于节能考虑确定分馏塔合理进料位置的方法和技术得到的计算结果基本相同。
文摘The 10th Chinese Gastric Cancer Congress （CGCC） and the 3rd Sunlight Great Wall Cancer Academic Conference, hosted by Chinese Anti-Cancer Association and Beijing Cancer Hospital, was held in Beijing International Conference Center on June 27-28th, 2015. The congress has continued the theme of ＂Standardization, Fusion,
基金Supported by the Program of Introduction of Talents of Discipline to Universities(B06006)
文摘A novel heat-integrated distillation scheme on pilot scale for producing C5 foaming agent, a mixture of isopentane and pentane in a certain proportion, was proposed with the aid of process simulation. Compared with the conventional distillation scheme, C5 foaming agent was directly separated at the top of the original isopentane or pentane column in the novel scheme, instead of first refining the two isomerides to high purities and then mixing them into final products. This improvement reduced the difficulty of the separation and avoided meaningless exergy loss caused by re-mixing, which finally contributed to an energy-efficient design by a big margin. Moreover, the column grand composite curves(CGCCs)were used to modify all distillation columns, indicating that there is potential to improve the energy efficiency further. Therefore, double-effect, or heat-integrated distillation was also adopted. Energy and exergy analyses were then conducted to evaluate the effectiveness of the proposed scheme for the purpose of energy saving. The simulation results of the conventional distillation scheme were in agreement with its on-site counterpart. Analyses showed that the novel heat-integrated scheme reduced hot utility by 27.12%,, cold utility by 24.49%,, and total exergy loss by 23.95%,.
文摘Chairman Hu Wei,Ladies and gentlemen,Dear friends,Good evening!It gives me great pleasure to attend the CGCC Annual Gala again and get together with friends old and new.In the past year,CGCC stayed committed againstall odds to serving Chinese-invested enterprises in the United States and building more bridges for business exchanges between our two countries,and effectively promoted bilateral mutually beneficial cooperation.
