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湿法磷酸生产? 在湿法 磷酸 生产过程中,低位闪冷器的绝压是否决定了闪蒸室中的料浆温度。提高 反应槽 温度除了提高低位闪冷器的绝压外还有没有其他更好的办法查看更多 0个回答 . 5人已关注
气动临时泵,有什么形式可以选? 气动驱动的临时 抽油泵 ,可以选用什么形式? 现在一般选用 气动隔膜泵 ,但是特别容易损坏,有没其他形式的泵可以满足? 工况:就是常温、常压、介质:汽柴油、 甲醇 。 查看更多 3个回答 . 3人已关注
多效蒸发溶液浓缩? 在稳态模拟中,为了能够进行动态模拟,需要添加泵与阀门。为什么在稳态模拟中,添加泵与阀门前后稳态模拟的结果不同。 查看更多 0个回答 . 2人已关注
谁能推荐几本自学机械设备的书? 我想自学一下设备专业的知识,刚从工艺岗位调到机动工程部,主要负责储运,哪位大侠能帮我推荐一下几本这方面的书,需要恶补一下啊,谢啦 查看更多 6个回答 . 1人已关注
往复式压缩机气体置换时要开水,油流程吗? 往复式压缩机 在进行 氮气 置换, 氢气 置换时要开冷却水,辅油泵吗?查看更多 4个回答 . 2人已关注
有没有接触变温吸附( TSA脱硫)这方面的? 关于脱硫机理? 脱硫条件(比如温度,) 再生方法 查看更多 6个回答 . 5人已关注
天大有多少版《化工原理》?哪个版本最好? 是姚玉英的还是夏清的还是柴诚敬的??这三个版本有什么关系么?好像姚玉英的最早最老,现在已经不出新的了,新出版的都是夏清和柴的,跟以前有什么不同么? 查看更多 2个回答 . 4人已关注
汽提塔分布器的问题? 30万吨 汽提塔 分布器 上,有多少个气相孔,有多少个液相孔啊,操作人员一直说我们的汽提塔分布器有点小 查看更多 7个回答 . 3人已关注
苯乙烯生产中的DNBP? DNBP能够在高温环境下抑制苯 乙烯 聚合。但是泄漏后污染设备,连泵台也变成了黄色,再还有 焦油 泄漏,怎么处理,头疼,求助查看更多 12个回答 . 5人已关注
反馈安装角度 不对的时候 可以通过475修正,真的不用物 ...? 查看更多 1个回答 . 3人已关注
空冷器的偏流是指管束外部的风发生偏流还是管束内的汽液 ...? 空冷器的偏流是指管束外部的风发生偏流还是管束内的汽液 混合物 会发生偏流呢?谢谢!如果 管束内是液体,还会发生偏流现象吗?偏流会造成哪些危害呢?希望能得到专业人士的回答!O(∩_∩)O谢谢! 查看更多 7个回答 . 3人已关注
MTP反应中甲烷含量多? 跟反应工艺条件有关系吧,比如温度压力这些的,工艺条件下会引起 催化剂 孔道结构的变化,载体孔道部分坍塌或者表面积碳查看更多 11个回答 . 3人已关注
大家在柱层析纯化硼酸酯的时候,一般用什么显色方式显色 ...? 如题, 硼酸酯 一般紫外较淡,除了碘显色和 高锰酸 钾显色还有什么比较好的显色方法吗?查看更多 0个回答 . 1人已关注
煤制乙二醇是甲酯好还是乙酯好? 希望各位朋友积极参与交流。 是用DMO加氢制MEG好还是用DEO加氢制MEG好。 对后续精馏工段的影响如何?查看更多 16个回答 . 1人已关注
脱苯塔富油带水原因及处理? 楼主做净化工作时间短,很多问题还都很外行.。想和有经验的同行请教下,富油带水的原因及处理方法。希望大家能多指点谢谢。 查看更多 1个回答 . 2人已关注
U管式换热器? U 管式换热器 为什么管程经过的流体多时冷却效果好查看更多 1个回答 . 1人已关注
用aspen plus模拟生物质热解但是总提醒有警告。望高人指 ...? 出现的警告如下,望高人们给点指点: ->Processing input specifications ... STRUCTURE FOR COMPONENT H2 HAS NOT BEEN DEFINED. PCES CANNOT USE GROUP-CONTRIBUTION METHODS TO ESTIMATE MISSING PROPERTIES USE THE STRUCTURES PARAGRAPH TO DEFINE STRUCTURES OF THIS COMPONENT. STRUCTURE FOR COMPONENT C HAS NOT BEEN DEFINED. PCES CANNOT USE GROUP-CONTRIBUTION METHODS TO ESTIMATE MISSING PROPERTIES USE THE STRUCTURES PARAGRAPH TO DEFINE STRUCTURES OF THIS COMPONENT. STRUCTURE FOR COMPONENT O2 HAS NOT BEEN DEFINED. PCES CANNOT USE GROUP-CONTRIBUTION METHODS TO ESTIMATE MISSING PROPERTIES USE THE STRUCTURES PARAGRAPH TO DEFINE STRUCTURES OF THIS COMPONENT. STRUCTURE FOR COMPONENT H2O HAS NOT BEEN DEFINED. PCES CANNOT USE GROUP-CONTRIBUTION METHODS TO ESTIMATE MISSING PROPERTIES USE THE STRUCTURES PARAGRAPH TO DEFINE STRUCTURES OF THIS COMPONENT. STRUCTURE FOR COMPONENT CH4 HAS NOT BEEN DEFINED. PCES CANNOT USE GROUP-CONTRIBUTION METHODS TO ESTIMATE MISSING PROPERTIES USE THE STRUCTURES PARAGRAPH TO DEFINE STRUCTURES OF THIS COMPONENT. STRUCTURE FOR COMPONENT CO HAS NOT BEEN DEFINED. PCES CANNOT USE GROUP-CONTRIBUTION METHODS TO ESTIMATE MISSING PROPERTIES USE THE STRUCTURES PARAGRAPH TO DEFINE STRUCTURES OF THIS COMPONENT. STRUCTURE FOR COMPONENT CO2 HAS NOT BEEN DEFINED. PCES CANNOT USE GROUP-CONTRIBUTION METHODS TO ESTIMATE MISSING PROPERTIES USE THE STRUCTURES PARAGRAPH TO DEFINE STRUCTURES OF THIS COMPONENT. STRUCTURE FOR COMPONENT N2 HAS NOT BEEN DEFINED. PCES CANNOT USE GROUP-CONTRIBUTION METHODS TO ESTIMATE MISSING PROPERTIES USE THE STRUCTURES PARAGRAPH TO DEFINE STRUCTURES OF THIS COMPONENT. * WARNING IN PHYSICAL PROPERTY SYSTEM PARAMETER PC/ELEMENT 1 (DATA SET 1) UPPER BOUND VIOLATED FOR COMPONENT C VALUE = 0.22300E+09, UPPER BOUND = 0.10000E+09 * WARNING IN PHYSICAL PROPERTY SYSTEM PARAMETER FREEZEPT/ELEMENT 1 (DATA SET 1) UPPER BOUND VIOLATED FOR COMPONENT C VALUE = 4300.0 , UPPER BOUND = 4000.0 * WARNING IN THE "STREAM" PARAGRAPH WHICH BEGINS ON LINE 107 STREAM NAME: WOOD THE SUM OF ATTRIBUTED COMPONENT VALUES IS NOT 100.0 FOR COMPONENT: WOOD TYPE: PROXANAL IN SUBSTREAM NC OF STREAM WOOD . Flowsheet Analysis : COMPUTATION ORDER FOR THE FLOWSHEET: C-1 DEC GAS SEP ->Calculations begin ... Calculator Block C-1 Block: DEC Model: RYIELD * WARNING SPECIFIED YIELDS HAVE BEEN NORMALIZED BY A FACTOR OF (17.0062) TO MAINTAIN AN OVERALL MATERIAL BALANCE. * WARNING THE FOLLOWING ELEMENTS ARE NOT IN ATOM BALANCE: H C Block: GAS Model: RGIBBS Block: SEP Model: SSPLIT ->Simulation calculations completed ... *** Warning(s) were issued during Input Translation *** *** Check the Run Status Results for more Information *** *** Summary of Simulation Errors *** Physical Property System Simulation Terminal Errors 0 0 0 Severe Errors 0 0 0 Errors 0 0 0 Warnings 0 0 2 << Problem specifications modified 21:12:18 Thu Jul 10, 2014>> ->Processing input specifications ... ->Finished processing new specifications ->Calculations begin ... Block: DEC Model: RYIELD * WARNING SPECIFIED YIELDS HAVE BEEN NORMALIZED BY A FACTOR OF (16.0086) TO MAINTAIN AN OVERALL MATERIAL BALANCE. * WARNING THE FOLLOWING ELEMENTS ARE NOT IN ATOM BALANCE: H C Block: GAS Model: RGIBBS Block: SEP Model: SSPLIT ->Simulation calculations completed ... *** Warning(s) were issued during Input Translation *** *** Check the Run Status Results for more Information *** *** Summary of Simulation Errors *** Physical Property System Simulation Terminal Errors 0 0 0 Severe Errors 0 0 0 Errors 0 0 0 Warnings 0 0 4 ->Generating results ... << Run Saved >> ->Processing input specifications ... STRUCTURE FOR COMPONENT H2 HAS NOT BEEN DEFINED. PCES CANNOT USE GROUP-CONTRIBUTION METHODS TO ESTIMATE MISSING PROPERTIES USE THE STRUCTURES PARAGRAPH TO DEFINE STRUCTURES OF THIS COMPONENT. STRUCTURE FOR COMPONENT C HAS NOT BEEN DEFINED. PCES CANNOT USE GROUP-CONTRIBUTION METHODS TO ESTIMATE MISSING PROPERTIES USE THE STRUCTURES PARAGRAPH TO DEFINE STRUCTURES OF THIS COMPONENT. STRUCTURE FOR COMPONENT O2 HAS NOT BEEN DEFINED. PCES CANNOT USE GROUP-CONTRIBUTION METHODS TO ESTIMATE MISSING PROPERTIES USE THE STRUCTURES PARAGRAPH TO DEFINE STRUCTURES OF THIS COMPONENT. STRUCTURE FOR COMPONENT H2O HAS NOT BEEN DEFINED. PCES CANNOT USE GROUP-CONTRIBUTION METHODS TO ESTIMATE MISSING PROPERTIES USE THE STRUCTURES PARAGRAPH TO DEFINE STRUCTURES OF THIS COMPONENT. STRUCTURE FOR COMPONENT CH4 HAS NOT BEEN DEFINED. PCES CANNOT USE GROUP-CONTRIBUTION METHODS TO ESTIMATE MISSING PROPERTIES USE THE STRUCTURES PARAGRAPH TO DEFINE STRUCTURES OF THIS COMPONENT. STRUCTURE FOR COMPONENT CO HAS NOT BEEN DEFINED. PCES CANNOT USE GROUP-CONTRIBUTION METHODS TO ESTIMATE MISSING PROPERTIES USE THE STRUCTURES PARAGRAPH TO DEFINE STRUCTURES OF THIS COMPONENT. STRUCTURE FOR COMPONENT CO2 HAS NOT BEEN DEFINED. PCES CANNOT USE GROUP-CONTRIBUTION METHODS TO ESTIMATE MISSING PROPERTIES USE THE STRUCTURES PARAGRAPH TO DEFINE STRUCTURES OF THIS COMPONENT. STRUCTURE FOR COMPONENT N2 HAS NOT BEEN DEFINED. PCES CANNOT USE GROUP-CONTRIBUTION METHODS TO ESTIMATE MISSING PROPERTIES USE THE STRUCTURES PARAGRAPH TO DEFINE STRUCTURES OF THIS COMPONENT. * WARNING IN PHYSICAL PROPERTY SYSTEM PARAMETER PC/ELEMENT 1 (DATA SET 1) UPPER BOUND VIOLATED FOR COMPONENT C VALUE = 0.22300E+09, UPPER BOUND = 0.10000E+09 * WARNING IN PHYSICAL PROPERTY SYSTEM PARAMETER FREEZEPT/ELEMENT 1 (DATA SET 1) UPPER BOUND VIOLATED FOR COMPONENT C VALUE = 4300.0 , UPPER BOUND = 4000.0 * WARNING IN THE "STREAM" PARAGRAPH WHICH BEGINS ON LINE 107 STREAM NAME: WOOD THE SUM OF ATTRIBUTED COMPONENT VALUES IS NOT 100.0 FOR COMPONENT: WOOD TYPE: PROXANAL IN SUBSTREAM NC OF STREAM WOOD . Flowsheet Analysis : COMPUTATION ORDER FOR THE FLOWSHEET: C-1 DEC GAS SEP ->Calculations begin ... Calculator Block C-1 Block: DEC Model: RYIELD * WARNING SPECIFIED YIELDS HAVE BEEN NORMALIZED BY A FACTOR OF (17.0062) TO MAINTAIN AN OVERALL MATERIAL BALANCE. * WARNING THE FOLLOWING ELEMENTS ARE NOT IN ATOM BALANCE: H C Block: GAS Model: RGIBBS Block: SEP Model: SSPLIT ->Simulation calculations completed ... *** Warning(s) were issued during Input Translation *** *** Check the Run Status Results for more Information *** *** Summary of Simulation Errors *** Physical Property System Simulation Terminal Errors 0 0 0 Severe Errors 0 0 0 Errors 0 0 0 Warnings 0 0 2 << Loading Simulation Engine 21:17:35 Thu Jul 10, 2014>> << Loading Simulation Engine 09:51:09 Wed Jul 16, 2014>> << Problem specifications modified 09:52:17 Wed Jul 16, 2014>> ->Processing input specifications ... ->Finished processing new specifications ->Calculations begin ... Block: DEC Model: RYIELD * WARNING SPECIFIED YIELDS HAVE BEEN NORMALIZED BY A FACTOR OF (16.0086) TO MAINTAIN AN OVERALL MATERIAL BALANCE. * WARNING THE FOLLOWING ELEMENTS ARE NOT IN ATOM BALANCE: H C Block: GAS Model: RGIBBS Block: SEP Model: SSPLIT ->Simulation calculations completed ... *** Warning(s) were issued during Input Translation *** *** Check the Run Status Results for more Information *** *** Summary of Simulation Errors *** Physical Property System Simulation Terminal Errors 0 0 0 Severe Errors 0 0 0 Errors 0 0 0 Warnings 0 0 2 << Problem specifications modified 09:53:24 Wed Jul 16, 2014>> ->Processing input specifications ... ->Finished processing new specifications ->Calculations begin ... Block: DEC Model: RYIELD * WARNING SPECIFIED YIELDS HAVE BEEN NORMALIZED BY A FACTOR OF (16.0086) TO MAINTAIN AN OVERALL MATERIAL BALANCE. * WARNING THE FOLLOWING ELEMENTS ARE NOT IN ATOM BALANCE: H C Block: GAS Model: RGIBBS Block: SEP Model: SSPLIT ->Simulation calculations completed ... *** Warning(s) were issued during Input Translation *** *** Check the Run Status Results for more Information *** *** Summary of Simulation Errors *** Physical Property System Simulation Terminal Errors 0 0 0 Severe Errors 0 0 0 Errors 0 0 0 Warnings 0 0 4 查看更多 1个回答 . 4人已关注
触摸屏的工作原理是什么,它涉及哪些知识面? 对于工业和家用电器中使用率最高的触摸屏一直都使我感觉到是一个盲区,请朋友们帮忙给解释一下.谢谢!查看更多 1个回答 . 1人已关注
氯碱:价格下挫挤压利润空间? 氯碱:价格下挫挤压利润空间 2012-09-24 07:11 来源: 每日经济新闻 对于大多数制碱类上市公司而言,今年三季度的日子恐怕不是很好过。 数据显示,截至9月19日, 纯碱 (重灰)的三季度价格为1502.54元/吨,环比下滑11.3%;纯碱(轻灰)的价格为1518.21元/吨,环比下降5.8%。产品价格的下滑直接压缩了纯碱类上市公司利润空间。如青岛碱业,今年二季度毛利率为7.64%,远低于去年同期的18.02%。三季度纯碱价格的进一步下滑更是压缩了公司的利润空间。再如双环科技同,去年三季度毛利率达31.11%,但随后四季度回落至17.96%,今年前两个季度的毛利率分别仅为19.2%、18.51%。 相对于纯碱价格的走势, 烧碱 三季度价格环比上升2.3%,达到819.15元/吨。对于后市,化工行业分析师表示,纯碱和烧碱主要受下游需求影响较大,保守估计四季度和三季度持平。 在化工类占据一席之地的PVC生产商,三季度业绩恐怕也无法让广大投资者满意。主力合约PVC1301数据显示,今年前三季度,PVC期货价格呈现逐步下降趋势。一季度,PVC平均价格为7290元/吨,二季度下滑至6815元/吨,截至9月21日,三季度PVC的平均指数进一步下滑至6620元/吨。与此相对应,主要的PVC生产商三季度业绩也无法乐观,如英力特、天原集团,产品毛利率均呈现下滑趋势。 而碱类中原盐三季度的价格微涨0.3%,单价为235元/吨。此外,截至9月19日, 盐酸 价格近20天上涨4.89%。但盐类相关产品的价格未见提升。原材料的微涨也蚕食了盐类上市公司的利润空间。 hcbbs ! ! 。 查看更多 1个回答 . 1人已关注
变换为什么老堵啊? 触媒粉化查看更多 2个回答 . 2人已关注
简介
职业:上海合诚精细化工有限公司 - 设备工程师
学校:兰州大学 - 历史文化学院
地区:吉林省
个人简介:等你结婚时,我负责替新郎喝孤独的酒,他负责替我给你幸福。查看更多
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