化工过程系统多目标夹点分析方法的案例研究  

Case study of multi-objective pinch analysis for chemical processes

作　　者：贾小平[1] 刘彩洪 钱宇[3] 

机构地区：[1]青岛科技大学环境与安全工程学院,山东青岛266042 [2]兖矿国宏化工有限责任公司,山东济宁273500 [3]华南理工大学化工学院,广东广州510640

出　　处：《计算机与应用化学》2011年第12期1573-1576,共4页Computers and Applied Chemistry

基　　金：华南理工大学传热强化与过程节能教育部重点实验室开放基金资助项目(KF0801);国家自然科学基金项目(2113603)

摘　　要：提出水夹点、热夹点和碳夹点的内在联系。利用序贯方法,依照多目标夹点分析方法及其步骤,通过案例对此方法进行验证。主要分如下3个步骤:(1)运用水夹点技术确定出最小新鲜水用量,并运用修正的NNA算法确定出水网络;(2)由得到的水网络图,提取各物流数据,运用热夹点技术确定出最小冷热公用工程用量;(3)由热公用工程数据和二氧化碳排放目标,利用碳夹点技术确定最小清洁能源用量和能源分配方案。通过实例分析,最终得到实例的系统需求最小新鲜水125.94 kg/s、最小热公用工程为5289 kW,最小冷公用工程为3.36 kW。在二氧化碳排放限制的情况下,得出能源合理分配方案,以及最小清洁能源用量2029 kJ/s。同时得到节水效率为23.24%,热公用工程削减81.34%,冷公用工程削减99.98%,节能效率显著。The relationships of water, heat and carbon pinch in chemical processes are presented. The goal of this work is to verify the multi-objective pinch analysis framework and procedures based on the proposed sequential method. Firstly, the minimum freshwater usage is determined according to water pinch analysis. The corresponding water using network is determined by using the modified nearest neighbor algorithm. Then, stream data are extracted from the proposed water using network. The minimum utility usages are determined according to heat pinch analysis. According to this utility data and carbon emission targets, the minimum clean energy usage and energy resource allocations are determined by using the carbon emission pinch analysis. The results show that the minimum requirements of freshwater, hot utilities and cold utilities are 125.94 kg/s, 5289 kW, 3.36 kW, respectively. The energy resource allocation is proposed, and the minimum requirement of clean energy consumption is 2029 kJ/s. The water-saving efficiency is 23.24%. It has resulted in a 81.34% reduction in the hot utilities, 99.98% in cold utilities.

关 键 词：序贯方法 多目标夹点分析方法 节水效率 节能效率 

分 类 号：TQ021.8[化学工程] TP391.9[自动化与计算机技术—计算机应用技术]