西南赛区-重庆科技学院学沫也疯狂汇总集摘要

1、年产 30 万吨乙二醇（EG）项目摘要：乙二醇（ethylene glycol，EG）是重要的芳烃产品，主要用于制聚酯涤纶，聚酯树脂、吸湿剂、增塑剂、表面活性剂、化妆品和，并用作染料/油墨等的溶剂、配制发的抗冻剂，气体脱水剂，制造树脂、也可用于玻璃纸、皮革、粘合剂的湿润剂，是重要的有机原料之一。本项目为某一大型综合化工企业设计一座采用清洁生产工艺对乙二醇（EG）进行的分厂。本项目采用搅拌式反应釜和反应精馏塔联合完成碳酸乙烯酯和甲醇的酯交换反应并完成碳酸二甲酯和乙二醇的分离，生产装置和生产方法生产效率高，生产能力大，能量消耗低，产品质量好，生产过程稳定，操作弹性大，易于控制。：乙二醇（EG）、清

2、洁生产、酯交换、联产1、工艺介绍本项目采用环氧乙烷和甲醇为原料，段：a.碳酸乙烯酯生产工段（见图1）:本工段中主要是将原料环氧乙烷及乙二醇。工艺流程主要分为三个工以气体的形式通入反应器，用溴化1-羟乙基-3-乙烯基咪唑、甲基丙烯酸纳、丙烯酸羟乙酯、苯乙烯4种单体共聚了高分子离子液体催化剂，将该催化剂固载到分子筛上制成固体颗粒催化生产碳酸乙烯酯的反应。最佳反应温度为403.15K，剂，催化环氧乙烷和最佳反应压力为2.5MPa。图1 碳酸乙烯酯生产工段流程图b.乙二醇联产工段（见图2）：1该工段是将第一个工段产出的碳酸乙烯酯与另一原料甲醇反应乙二醇和碳酸二甲酯的反应。过程中以季铵盐离子液体为催化剂

3、，通过酯交换和反应精馏 碳酸二甲酯，催化剂用量为碳酸乙烯酯质量的0.1%2.5%，反应压力为 0.10.2MPa，反应温度为6090，反应时间为12小时，同时，联产乙二醇。该催化剂为绿色催化剂，可重复利用而催化效果不发生明显降低。图2 乙二醇联产工段流程图c.分离精馏工段（见图3）：这是本方案的产品产出阶段，反应压力为1.3个大气压，温度为484K，乙二醇从塔顶流出；反应压力为1.4个大气压时，产物碳酸二甲酯从塔底流出，即可得到两种产品。图3 分离精馏工段具体工艺操作详见可行性。22、节能消耗通过计算得到，系统的公用工程夹点温度为610，所需热公用工程99用量为 1.67810 kJ/h，冷公

4、用工程用量为 5.00010 kJ/h。通过 Aspen的计算和比较，选用多品味公用工程。通过优化，热公用工程节能了 60%，冷公用工程节能了 30%，优化后的换热网络夹点温度在 160左右。：图 4 换热网络匹配图3、厂区及车间布置（1）厂区布置图（见图 5）此分厂南北长 320 米、东西宽 223 米，设有四门（东、西、南、北）北门为正门其余三门用于原料产品的进出及员工出入，生产区主建于南部下风区域，原料由南门进入产区灌装区，再由灌装区流入反应车间，生产产品经检验后由主道进入位于产区东面的仓库，产品再由仓库经东门流出厂区。其余办公生活区主建于北部。3图 5 厂区布置图(2).车间布置图如图

5、：4图 6乙二醇生产车间俯视图图 7乙二醇生产车间侧视图图 8乙二醇生产车间主视图4、经济分析综合经济评价指标5序号指标名称数值1设计规模万吨/年302年操作时间小时/年70005、总结本次设计采用 Aspen Plus完成全流程的模拟，能量、物料以及工艺参数的确定，节能设计上利用 Aspen Energyyzer 模块对全系统设计不同的热集成方案并进行优选，据此完成系统公用工程的模拟设计，同时对精馏系统进行热分析与集成；安全设计上引入道氏化学火灾、行安全评估，具体内容参见相关文档。指数评价系统对罐区进63分厂用地面积平方米712734建筑面积平方米24551.25总定员人3596工程项目总投

6、资万元81497.417固定资产投资万元64680.488直接材料费用万元/年3671659年总成本费用万元/年39626410全厂总产值万元/年55490311年净利润总额万元/年13907212投资利润率%170.65%13投资利税率%41.69%14投资回收期年3.8Annual production capacity of 300,000 tons of ethylene glycol (EG) projectsSummary: ethylene glycol (ethylene glycol,EG) is important of aromatic products,main for

7、 business polyestolyester, polyester resin, and moisture agent, andplasticizer, and surfactant, and synthetic, and cosmetics and explosives, and as dye/ink, of solvent, and preparation engine of anti-frozen agent, gas dehydration agent,manufacturing resin, and also can for cellophane, and fiber, and

8、 leather, and adhesiveof wet agent, is important of petrochemicalanic raw materials one of. This projectis a large comprehensive chemical company to design a clean production pros ofethylene glycol (EG) production factory. The project stirredreactors and reactivedistillation column jocomplete Transe

9、sterification of ethylene carbonate andcomplete Transesterification of dimethyl carbonate from menol and dimethyl andethylene glycol separation and production apparatus and production method of highefficiency, large capacity, low energy consumption, product quality, proeasy to operate, easy to contr

10、ol.s stability,Key words: ethylene glycol (EG), cleanroduction, Transesterification, CHP1.ProsroductionThis project using ethylene oxide and menol as raw materials, the synthesis ofethylene glycol. Pros is dividedo three sections:A. ethylene carbonate production section (see Figure 1):This sectionhe

11、 main is will raw materials ring oxygen ene and the carbondioxide to gas of form passo reactor, with bromide of 1-hydroxyl b base -3-vinylbase meters h, and methyl acrylic na, and acrylic hydroxyl b ester, and styrene 4species monomer total aggregateo has polymer ion liquid catalyst, will the cataly

12、stsolid contains to molecular screen Shang made solid particles catalyst, catalytic ringoxygen ene and carbon dioxide production carbonate vinyl ester of reaction.Optimum temperature is 403.15K, the best prere of 2.5MPa7Figure 1 ethylene carbonate production pros flow chartB. ethylene glycol and The

13、 section is thematerial preparation ofer section (see Figure 2):section of output of ethylene carbonate winother rawethylene glycol and dimethyl carbonate from menolsreaction. By quaternary ammonium salt of ionic liquids as catalysthe prothrough Transesterification synthesis of dimethyl carbonate by

14、 reactive distillationand, quality of the catalyst for the Transesterification of ethylene carbonate0.1%2.5%, prere for the 0.10.2MPa, the reaction temperature is 6090,reaction time of 1-2 hours, and co-production of ethylene glycol. The catalyst is acatalyst freen, reusable and catalytic effects ar

15、e not significantly reduced.Ethylene glycol figure 2-generation pros flowchartC. separation distillation section (see Figure 3):This stage is the product of the programme outputs, prere of 1.3 atmospheres at atemperature of 484K and ethylene glycol flows from top; when the prere is 1.4 bar,dimethyl

16、carbonate product flow out of the bottom, you can get two products.8Figure 3 separating stage hycrogenation distillationSpecific prosing operation as described2. energy conservationhe feasibility report.Calculated by software, system utilities pinch temperature is 610, 1.678x109kJ/h hot utilities us

17、age required for cold utility usage for 5.000 x109kJ/h. By Aspen software to calculate and compare, we use multiple utilities. By optimizing thermalutility energy efficiency 60%, cold utility energy conservation 30%, optimization ofheat exchanger network pinch temperature at about 160 . As shownhe f

18、igure:Figure 4 matching of heat exchanger networks3. Factory and workshop layout（1）Plant layout (see Figure 5)This branch North-South long 320 meters, and things wide 223 meters, has four door (East, and West, and South, and North) North door for main entrance remainingthree for raw materials produc

19、ts of acs and the employees acs, productiondistrict main built Yu southern downwind regional, raw materials by South doororegion filling district, again by filling districto reaction workshop, productionproducts by test Hou by main roado is located in region East of warehouse,products again by wareh

20、ouse by East outflow factory. The remaining Office livingquarters builthe North.Figure 5 factory layou(2). the workshop layout as shown in Figure:10Figure 6 ethylene glycol production workshop top viewFigure 7 ethylene glycol production plant side view11Figure 8 ethylene glycol production plant main view4.EconomicysisComprehensive economic evaluations5、SummaryThis times design used Aspen Plus software completed full pros of simulation,energy, and material scale