首页
说教
影响力0.00
经验值0.00
粉丝15
工艺专业主任
来自话题:
硫回收是否有一种加氢催化剂,可以将SO2直接加氢还原成 ...? 有没有知道,还原反应催化剂a777的????查看更多
如何理解分馏塔侧线抽出量与抽出温度的关系? 侧线抽出增大,那么内回流减少,气相上升,温度升高。高温介质上移,侧线产品干点上升查看更多
来自话题:
冷冻机组冷媒水的互换问题? 看铭牌上的设计温度或工作温度参数,如果氯化钠溶液能够达到要求就可以用。但建议咨询生产厂家,否则机组出问题时生产方可以以此为理由推脱该负的责任。查看更多
来自话题:
酸不稳定产物如何跑板? 没人知道么???查看更多
fabrication和manufacture的区别(竹竹请进)? 谢谢大家这么来邀請俺发表意見。b-j-y 已经給了好的解释,俺来继续一下。 其实大家用英文google一下“difference between fabrication and manufacturing”就会发现很多解释的呀。俺个人同意这篇的解释: http://www.businessknowledgesour ... cturing_023637.html fabrication versus manufacturing fabrication versus manufacturing, what is the difference and how does it affect us? how do these two types of creating products affect our world? first it is a good idea to understand the difference between manufacturing and fabricating. here is a good explanation of both. manufacturing: this is the process of using several semi-conductors, devices, or circuits to create something. the use of raw materials is brought together to create something new. manufacturing is considered a very large part of industry. manufacturing is not only the process used for making objects; there is also processes that are considered manufacturing that are consumable. food manufacturing like, tea, cheese, etc are also manufacturing processes. manufacturing goal: the goal is to create large amounts of devices or circuits. these should be created at a low cost, for high profit. the turn around goal for manufactured products is fast. most of the research that is included with manufacturing is: manufacturing methodology statistical process control factory simulations operations research process integration fabrication: this is the process or manufacture of parts, usually structural or electromechanical. this involves the design of a circuit or device. this can also include the creation of a machine that will be used in the total manufactured product. fabrication goal: getting one device or circuit to work is the overall success. the best research for fabrication is: when new devices, better technology, faster and more productive options become available fore manufacturing. therefore as a whole, fabrication is considered part of manufacturing. fabrication is the steps that are involved in manufacturing. if you were to take the example of a house being manufactured, then you would use these steps of fabrication to get the total house. two builders use wood, dry wall, nails and tools to build a wall. then the two builders created three more of those walls. these walls are all put together and a roof is added. the walls were fabricated and the house is manufactured. this is only an example, as stated earlier; the process of manufacturing and fabricating has to do with circuits and devices. now that we have an idea of how fabrication and manufacturing fits together you know why it takes the fabrication of the motherboard and circuits to manufacture a computer. or, it takes the fabrication of an engine, radiator and tires to complete the manufacture of the car. there are many economists that suggest that manufacturing is one of the strongest wealth producing sectors that are available in our economy. this is likely to be true as there are many companies that fabricate parts, and manufacture goods that are used here in the united states and in other countries around the world. however manufacturing and fabricating can come at a cost. this is why it is required that companies use safety measures with both their fabrication and manufacturing. there are organizations, in addition to state and federal agencies that set standards and regulations for the fabricating and manufacturing of products. these are created for the safety of the employees, the community and the world. with both manufacturing and fabrication it is important to realize that they both play an important part of what we do in our life today, and what we do it with. there are many times that these words are used interchangeably, however they do have their differences. regardless of if there are stories that are fabricated about manufacturing the truth is that together they work to make the devices or products we need to do the work we do, have the fun we have and clean up the messes we make. 俺个人用这两个词的用法,如果是一两个东东的零星制造,特別是零配件的东东,一定用fabricate/fabrication; 如果是生产线、大规模的成批生产,则用manufacture/manufacturing. 而fabrication可以是manufacturing过程中的一部分,也可以是单独的(这时常常指是手工或者特造的,比如俺买家里的三角钢琴時候,店里的销售老板就特意告诉俺,这琴是fabricated出来的,而不是像有些别的牌子manufactured出来的)。 从历史来说,fabrication是早就有的东东,manufacturing是现代工业化之后才有的东东。查看更多
来自话题:
硫磺尾气碱洗法改造? 硫磺回收尾气碱洗工艺相对简单,与催化裂化烟气脱硫类似,碱洗塔可设计为孔塔或填料塔,个人不建议设计为塔盘塔。 从流程上来说,claus尾气加氢还原后经mdea吸收后的尾气进焚烧炉,焚烧后的烟气经过热量回收后进碱洗塔。 关键是进碱洗塔的问题,设计温度越高,补水量越大。这一部分是技术诀窍,每个设计院对此认识不同,因此设计的结果也是不同的。 碱洗工艺带来的问题:(1)增加了一条白龙,目前上海、浙江等地对白龙要求治理,但目前不是针对炼化企业。(2)外派高浓度含盐污水,尽管数量不是很多可以做到间断排放。(3)焚烧炉的操作提高了,由原来的负压炉变成了正压炉,设计理念和操作方法都有所概念。(4)烟囱设计问题,上碱洗塔后的烟气排放,是从原来的烟囱排放,还是直接从碱洗塔定排放,值得认真考虑。上碱洗塔后,如果从原来的烟囱排放,主要问题是烟囱抽力不够,烟囱腐蚀严重。如果从碱洗塔顶直接排放,涉及白烟问题。如果碱洗塔顶烟气与入口高温烟气换热后可以实现消除白烟,利用原来的烟囱排放,但是整个流程复杂了,气气换热器增加了冷流和热流的压降,另外长周期运行还有待于考证。查看更多
来自话题:
离心式液氧泵电机驱动端轴承温度总是高是什么原因? 检修前,也出现过这样的现象,但温度升高的频率较小。检修后,这样的现象反而上升了。震动正常,声音的话 ... 这种现象的话建议楼主有机会还是着重检查轴承游隙。查看更多
来自话题:
氟利昂压缩式冷冻机组制冷效果差,原因不祥请各位大侠帮 ...? 肯定会污染的,如果冷却介质是水的话,可以通过多次干燥,尝试一下吧查看更多
大家的制氢装置,一般 中变气分水器有几个哦? 两万标立焦化干气制氢装置,3个分水罐。 查看更多
己二酸国内生产厂家? 辽化精己二酸14万吨/年,法国隆波利公司的技术,采用环己烷空气氧化得到环己酮、环己醇混合物,精制后采用硝酸氧化得到己二酸。查看更多
化工装置设备基础图? 按照楼上去学习,很快就能看懂!!!查看更多
来自话题:
一批药物的合成方法? lz真是强人,都参与过这么多的项目查看更多
来自话题:
求粉煤加压输送系统操作要点。? 把顺控看明白了,在把联锁记住了,就ok了!!!查看更多
来自话题:
SNCR脱硝氨耗量计算软件(华电和大唐算法)? 购买了 谢谢提供。 查看更多
来自话题:
筒体开孔计算问题? 软件不能算了,因为软件会把长方形按圆孔处理,这样开孔就把壳体直径还要大了,所以只能手算,孔径取孔的长轴尺寸查看更多
来自话题:
浅谈煤焦油悬浮床加氢:? 支持 查看更多
来自话题:
碳铵结晶的问题? 开此换热器付现阀门,降低水冷器负荷。查看更多
电脱盐注水问题? 你不注水的情况下闪蒸塔和常压塔塔顶压力不高,注水后就升高了,这应该是明显的带水过去了,你注水前看一下常顶回流罐切水调节阀的开度在多少,电脱盐注水后等常顶压力升上来之后再看一下脱水调节阀的开度是不是大了,大了的话肯定就是带水过来了,带一点点水也会在成压力升高的。你的原料不会分层吧,不会正好遇到你注水的时候性质轻的原料到闪蒸塔了吧。你多试几次看看是不是每次注水都这样。查看更多
谁有配煤工、备煤工等国家职业标准啊?? 5楼朋友的标准是不知是新的还是旧的?旧的是我们厂前辈们编的。2005年根据国家社会劳动保障部要求,又进行了重新修订,2008年5月通过了炼焦行业专家的最终审定,但一直没见发布。查看更多
苯乙烯工艺一对一答疑办公室? 本帖最后由 leeggzz 于 2013-3-8 12:03 编辑 2、我在另外一个分区,上传了一篇文献《10wt/a催化裂化干气制乙苯装置技术改造研究》,其中乙苯分离部分为 ... 1、wfy0309朋友公司的乙苯精馏部分也是这些塔吗?包括:吸收塔、稳定塔、循环苯塔、乙苯精馏塔、多乙苯塔。 2、没有取消个别塔,比如取消稳定塔?或取消吸收塔? 3、是否都增加丙苯塔?如你在 https:///thread-1116832-1-1.html c107,你装置肯定增加了,那 naruto 朋友的装置是否有相应的改进? 4、这可能是干气制乙苯工艺技术由第二代技术到第三代技术的改进,楼主谈谈为什么有这些技术的改进? 5、反应部分有几个反应器(备用反应器不算)? 6、你在 https:///thread-640432-1-2.html 提供了循环苯塔的流量、温度、压力等数据?可否再提供 进料组成 数据? 7、循环苯塔是第11层侧线采出,抽出的是苯、甲苯混合物吧? 8、反烃化产物应该是异构制乙苯的产物吧,与循环苯塔有什么关系? 这类问题是专门的装置,盖德上关注度不高,除了像我这个乙苯工艺小白,好奇好学的人在问问题! 查看更多
简介
职业:上海河图工程股份有限公司 - 工艺专业主任
学校:兰州大学 - 西部环境与气候变化研究院
地区:江苏省
个人简介:她说她这一生也只能这样了,在男人身下承欢,偶尔也想想,以前说保护她的人去哪了。查看更多
已连续签到天,累积获取个能量值
  • 第1天
  • 第2天
  • 第3天
  • 第4天
  • 第5天
  • 第6天
  • 第7天
 
这是一条消息提示
 
提醒
您好,您当前被封禁天,这天内您将不能登陆盖德问答,离解封时间还有
我已了解
提醒
提问需要5个能量值,您当前能量值为,请完成任务提升能量值
去查看任务