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化工研发
空压机排放管线结露原因? 回复 2# ycy4792328 值得注意的是:该手动阀门在设备运行过程中并不是全部打开,只是打开一点。有一定的节流作用。但是节流后会结露,有点理解不过来!查看更多
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热工仪表培训教材? 你在哪上班啊!热工太窄 查看更多
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钢板在不同温度下的屈服强度是多少? 200以后性能随材料的差异变化比较大,以上数据在200以下比较准一些 想要具体数值,联系我 说明材质 板厚 ... 请问,spv490q钢在20℃、100℃、200℃、300℃、400℃、500℃、600℃、700℃下的屈服强度知道吗? 查看更多
植筋与膨胀螺栓? 这是土建上的不太懂,不好枉下结论,但是我个人认为两者不同,螺栓紧固应该差点吧!查看更多
晃电后新氢机? 大电机的启动是需要保护的,带负荷会导致启动电流过大,进出口阀开,电机启动带动活塞时承受一定的压力,即带有一定的负荷,虽然气体未被压缩。也许不关出入口阀也无大碍,但严格意义上应该先空转再加负荷。查看更多
燃料气管网瓦斯带液问题? 在各装置燃料管网出口加缓冲罐,另外生产正常是保持管压网力0.45mpa以上。查看更多
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废水综合处理厂设计单位咨询? 这应该是各污水处理公司展示自己的好机会啊,呵呵,说点个人体会,在选择污水处理工艺和设计单位时,考虑下各单位资质问题是必须得,但是一定要结合自己实际需要,不同化工园区内化工装置是有却别的,排放污水性质差异也很大,建议开展现场中试进一步确认污水处理工艺查看更多
电解工房保暖 帮忙? 你可以用聚苯乙烯板作为保温材料查看更多
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关于“北京中科合成油工程公司”的问题? 你的工作经验还少一年,如果四年月薪估计在一万~此公司工资在行业中很高! 回复 1# laozhu000 查看更多
烧嘴压差波动(频率大概为每天4到5次)? 煤浆管道压力降低,氧气流量变大,中间肯定存在某种逻辑。查看更多
徐州中能淮北多晶硅项目? 期待结果中 不知道以后会如何?查看更多
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压力容器封头需要提供监检证吗? 因地而异吧,不过还是感觉这个东西需要检验,毕竟生产中的安全问题需要有保障查看更多
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关于气化型煤造气问题? 腐植酸钠粘合剂配制法 作者/来源:郝又科,郝保国 (湖北宜城邓林襄邓化肥厂 441419) 日期:2009-03-02 点击率:10 -------------------------------------------------------------------------------- 腐植酸钠是制作腐植酸煤棒(型煤)的粘合剂,其质量优劣决定着煤棒的质量好坏。 1 生产原理 用纯碱(na2co3)或烧碱(naoh)溶液抽取褐煤中所含的腐植酸通过碱和酸中和成腐植酸钠盐溶于水中作粘合剂,其化学反应式为: r(cooh)n+nnaoh→r(coona)n+nh2o 通过复分解反应,腐植酸变成钠盐溶于水中,而碳酸根则和钙离子结合生成碳酸钙沉淀。对泥炭讲,为避免木质素的溶解,na2co3是泥炭腐植酸较理想的萃取剂。 2 配制粘合剂工艺流程 配制腐植酸粘合剂的工艺流程见图1。 3 工艺指标 反应温度:95~105℃;反应时间:30~40min;搅拌速度:20~30r/min;提取桶粘合剂溶液容积为3/4桶;提取桶10d左右清洗1次。 粘合剂各组分用量:使用含腐植酸20%~40%的褐煤时,naoh含量95%的固体纯碱或na2co3含量98%以上的纯碱为褐煤量的3%~6%,水用量为褐煤量的1~2倍。通常情况下,褐煤、水、碱的比例为l:1.4:0.03。制液过程中,不可随意加水;碱的加入量不能太多,加多了制棒时常产生气泡,制出的煤棒较松散,强度不高;加少了,提不出腐植酸。 4 制造(操作)顺序 先在粘合剂萃取桶内加一定量的水,同时向桶内直接通入一些蒸汽,再投入一定量(计算量)的na2co3或naoh。若是固体纯碱需打碎,块度以不卡住搅拌桨为宜。 20min后,待na2c03或固体纯碱基本上溶解、碱液温度上升至60℃时,重新启动搅拌桨,并逐步投入褐煤。此时加大蒸汽通入量并继续搅拌,用蒸汽调节并维持反应温度(95~105℃)。反应30~40min后,吸取少量提取液,检查反应基本完全后,停加或减少蒸汽通入量,继续搅拌待用。冬季或待用时间长时,为避免温度下降,可加少量蒸汽,将温度维持在40~60℃之间。一般情况下,粘合剂配制合格后要及时使用。 5 检验方法 提取腐植酸钠溶液的容器静置于地面,观察颜色应为褐色,手触有粘性,无明显碱滑感,稍后会在表面结一层薄而均匀的表皮;将其倒在地上,随着温度降低而流动性变差、粘度变大,容器底部应无明显褐煤沉淀物。用棒插试,提起时粘合剂缓慢地沿棒往下流。 6 配制时原料质量要求 (1)水:要选择干净的一次用水(硬水)即清水。 (2)碱:要选择优质的na2co3或naoh。 (3)褐煤中的腐植酸含量必须在20%~40%,最好在30%以上,褐煤颗粒最好粉碎至2 mm以内。若使用已加工成型(袋装)的褐煤原料更佳查看更多
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推荐齿轮泵? 回复 5# 兵兵 维修找厂家啊,主要看代理商的实力,一般viking在中国都是代理商在服务。 交货期确认过长,不过没有办法毕竟是从美国直接进口的。查看更多
唐永进《压力管道应力分析》(第二版)? 学习学习 查看更多
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机械密封54,62的区别? 呵呵!请看这个!希望对你有帮助! 查看更多
每天五道题,轻松学乙烯10? 48 事故原因不查明不放过 事故责任不 查看更多
机组润滑:为啥设置个节流阀? 请问: 调整的时候,是否油压会低,油量会大些? 另外,油量过大出轴承的油温是否反而升高? 查看更多
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甲醇合成弛放气回收问题? 给别的厂子作燃料气,用不了的火炬放散。查看更多
经典的英语? 的确经典 1.记住该记住的,忘记该忘记的。改变能改变的,接受不能改变的。   remember what should be remembered, and forget what should be forgotten. alter what is changeable, and accept what is mutable.      2.能冲刷一切的除了眼泪,就是时间,以时间来推移感情,时间越长,冲突越淡,仿佛不断稀释的茶。   apart from tears, only time could wear everything away. while feeling is being processed by time, conflicts would be reconciled as time goes by, just like a cup of tea that is being continuously diluted.      3.怨言是上天得至人类最大的供物,也是人类祷告中最真诚的部分。   complaints are the greatest offerings that god obtains from human beings, as well as the most faithful prayers human beings might utter to god.      4.智慧的代价是矛盾。这是人生对人生观开的玩笑。   wisdom appears in contradiction to itself, which is a trick life plays on philosophy of life.      5.世上的姑娘总以为自己是骄傲的公主(除了少数极丑和少数极聪明的姑娘例外)。   girls always look on themselves as proud princesses, with the exception of a small number of either extremely ugly or exceedingly smart ones.      6.如果敌人让你生气,那说明你还没有胜他的把握。   it can be inferred that you lack confidence in a victory over your rivals from the fact that you''re irritable against them.      7.如果朋友让你生气,那说明你仍然在意他的友情。   from that you would get angry with your friends, we can conclude you sitll care about the friendship between you.      8.令狐冲说“有些事情本身我们无法控制,只好控制自己。” 可是,他算什么!   “ something is out of our control, so we have to command ourselves.” said linghu chong, a known character in a chinese novel about persons adept in martial arts(武侠小说?). who is, however, ***ing he?      9.我不知道我现在做的哪些是对的,那些是错的,而当我终于老死的时候我才知道这些。所以我现在所能做的就是尽力做好每一件事,然后等待着老死。   only till my natural death could i tell which of what i have been doing is right or wrong, so now i have to try to do well in everything, and then wait to die a natural death.      10.也许有些人很可恶,有些人很卑鄙。而当我设身为他想象的时候,我才知道:他比我还可怜。所以请原谅所有你见过的人,好人或者坏人。   some may be wicked, and some may be despicable. only when i put myself in their position did i know they are more miserable than i. so forgive all that you have met, no matter what kind of persons they are.      11.鱼对水说你看不到我的眼泪,因为我在水里.水说我能感觉到你的眼泪,因为你在我心里。   “you couldn't see my tears cause i am in the water.” fish said to water.   “but i could feel your tears cause you are in me.” answered water.      12.快乐要有悲伤作陪,雨过应该就有天晴。如果雨后还是雨,如果忧伤之后还是忧伤,请让我们从容面对这离别之后的离别。 微笑地去寻找一个不可能出现的你!   happiness is accompanied by sorrow, and it would turn sunny after rain as well. if rain remains after rain and sorrow remains after sorrow, please take those farewells easy, and turn to smilingly look for yourself who is never to appear.   13.死亡**人一切,如同考试之后公布的结果?虽然恍然大悟,但为时晚矣!   like the outcome after an exam, death makes us aware of anything, that is, it's too late to take a tumble.       14.你出生的时候,你哭着,周围的人笑着;你逝去的时候,你笑着,而周围的人在哭!   when you were born, you're crying but lookers-on were smiling. when you are passing away, you're smiling but lookers-on are crying.      15.男人在结婚前觉得适合自己的女人很少,结婚后觉得适合自己的女人很多。   man might think that few women fit him before his marriage, and contrarily when they get married.      16.于千万人之中,遇见你所遇见的人;于千万年之中,时间的无涯荒野里,没有早一步,也没有晚一步,刚巧赶上了。   among thousands of people, you meet those you've met. through thousands of years, with the boundlessness of time, you happen to meet them, neither earlier nor a bit too late.    17.每个人都有潜在的能量,只是很容易:被习惯所掩盖,被时间所迷离,被惰性所消磨。  everyone has his inherent ability( power or capacity?) which is easily concealed by habbits, blured by time, and eroded by laziness( or inertia?).      18.人生短短几十年,不要给自己留下了什么遗憾,想笑就笑,想哭就哭,该爱的时候就去爱,无谓压抑自己。   be sure that you have never had any regrets in your life which only lasts for a few decades. laugh or cry as you like, and it''s meaningless to oppress yourself.    19.《和平年代》里的话:当幻想和现实面对时,总是很痛苦的。要么你被痛苦击倒,要么你把痛苦踩在脚下。   while our dream is confronted with the reality, you always feel painful. just trample on the pain, or you''ll be beat down by it.    20.真正的爱情是不讲究热闹不讲究排场不讲究繁华更不讲究嚎头的。   a true love is what doesn't strive for busyness, for extravagance, for luxury, and moreover for hokum.       21.生命中,不断地有人离开或进入。于是,看见的,看不见了;记住的,遗忘了。生命中,不断地有得到和失落。于是,看不见的,看见了;遗忘的,记住了。 然而,看不见的,是不是就等于不存在?记住的,是不是永远不会消失?   there is someone that is coming or passing away in your life around the clock, so you may lose sight of those seen, and forget those remembered. there is gain and loss in your life, so you may catch sight of those unseen, and remember those forgotten. nevertheless, doesn''t the unseen exist for sure? will the remembered remain for ever?      22.我们确实活得艰难,一要承受种种外部的压力,更要面对自己内心的困惑。在苦苦挣扎中,如果有人向你投以理解的目光,你会感到一种生命的暖意,或许仅有短暂的一瞥,就足以使我感奋不已。   it's true that we have been leading a difficult life, for we need not only to be under various external pressures, but also to be in the face of internal perplexities.you would be affected by the warmth of life if someone gives you an understanding look during your bitter struggle.even a mere glance would make you moved and inpired.      23.我不去想是否能够成功,既然选择了远方,便只顾风雨兼程;我不去想,身后会不会袭来寒风冷雨,既然目标是地平线,留给世界的只能是背影。  i wouldn't care success or failure, for i will only struggle ahead as long as i have been destined to the distance. i wouldn''t care the difficulties around, for what i can leave on the earth is only their view of my back since i have been marching toward the horizontal.      24.后悔是一种耗费精神的情绪.后悔是比损失更大的损失,比错误更大的错误.所以不要后悔。   penitence is something that enervates our spirit, causing a greater loss than loss itself and making a bigger mistake than mistake itself, so never regret.查看更多
简介
职业:通标标准技术服务有限公司 - 化工研发
学校:曲阜师范大学 - 孔子文化学院
地区:湖南省
个人简介:既然选择,何来的后悔。查看更多
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