首页
眉目
影响力0.00
经验值0.00
粉丝17
安全工程师
来自话题:
再给大家出几道题? 1、过热器的作用是将由汽包来的 ( 饱和蒸汽 )加热成 (过热蒸汽 ) 。 2、按传热方式,过热器大体可分为( 对流式过热器 ),( 辐射式过热器 ),半辐射式过热器。 3、省煤器的作用是利用锅炉 ( 烟气)的余热加热锅炉给水 。 4、锅炉各项热损失中 ( 排烟热损失 )是最大的一项。 5、锅炉汽水循环的方式主要有两种,即 ( 自然循环 ) 和 ( 强制循环查看更多
安装问题,菜鸟求助? sql 2005 dotnetfx35 那sql安装的时候选的是mixed mode吗?要不装sql2008试试查看更多
来自话题:
关于柴油汽提塔控制柴油闪点? 这个你从轻柴油的停留时间就可以完美的解释了,当轻柴汽提塔的液位控制比较高的时候,单位时间内在塔内轻柴 ... 我是同意这个观点的 查看更多
新装置原始烘衬时需要气密吗? 烘衬里时还是有一定压力的,如果不气密,泄漏点因烟气中含有催化剂,会越漏越大,新装置也不能保证完全没有杂质,所以还是应气密。查看更多
三氯氢硅提纯? 首先源头要尽量减少杂质的引入,其次要看你们精馏的设计和运行水平了查看更多
芳烃抽提回收塔的压控? 个人不懂你这套装置的工艺,但我曾经学过常减压的抽真空原理,从你pfd图看了下,觉得: 1.d-4208安装在e-4 ... 谢谢!开始我也考虑过不凝气可能伴随蒸汽凝液通过这个dn80的管线进入d-4208,但不确定事实是否会这样,必经蒸汽凝液是连续通过这跟管线的查看更多
关于电气摇绝缘? 必须的,断开为了防止在摇绝缘时把软启动或变频器中半导体元件击穿。查看更多
来自话题:
请问大家都是用什么设备测试光催化效率的啊? 应该先通过文献调研,确定可能的研究方向,然后和导师讨论,再考虑买什么设备。查看更多
来自话题:
这个常压设备焊缝的无损检测选取? “本标准一般不要求100%无损检测,但设计需要-100%无损检测且取相应的系数时须按gb150要求无损检测的合格级别。” 根据jb/t4735上这段话的描述,我理解为既然系数取0.9我们就可认为其是带垫板的单面焊,且要求100%探伤,合格级别为100%探伤rt2级合格ut1级合格。个人理解是这样的,但总觉得这样一样常压容器就跟压力容器要求一样了有点奇怪。查看更多
来自话题:
技术工作与销售工作,哪样更重要? 先做技术工作,等成熟了做市场销售,路子会很广!查看更多
来自话题:
三氧化二铝能否回收利用? 谢谢你的回答。我所说的不是矿产品,而是含有三氧化二铝的产品。能否再具体的讲一下,回收的成本高不高? 我的qq:1173372608查看更多
FCC汽油选择性加氢精制后油品中含碱为什么? fcc汽油选择性加氢精制后应该还是要进汽油脱硫醇装置啊? 若汽油脱硫醇采用催化氧化脱硫醇工艺(merox法)进行脱除,碱液时间长或操作波动汽油带碱也很常见。查看更多
来自话题:
求煤制天然气固定床气化炉结构图? 《现代煤化工手册》上面很全、很详细的。查看更多
汽油醚化后的特点? 汽油醚化是以催化稳定汽油中轻汽油为原料,催化汽油中初馏点到75℃馏分的叔戊烯、叔己烯和叔庚烯在酸性树脂 ... 那他对其辛烷值、蒸汽压的影响 查看更多
降压孔板是如何降压的? 4# bingfeng1203 前几位说的也没有错啊,他们说的是带孔板的流量计的计量原理啊 我们催化装置的烟气降压孔板是为了防止通过双动滑阀的烟气流量和压力变化大损害设备啊查看更多
来自话题:
电脑上dcs调节阀手动突然变成自动,过不了几秒钟又恢复 ...? 如何进入工程师站呢?请赐教 查看更多
来自话题:
再给大家出几道题? 1、过热器的作用是将由汽包来的(饱和蒸汽)加热成(过热蒸) 。 2、按传热方式,过热器大体可分为(对流式过热器),(辐射式过热),半辐射式过热器。 3、省煤器的作用是利用锅炉(烟气)的余热加热锅炉给水 。 4、锅炉各项热损失中(排烟热损失)是最大的一项。 5、锅炉汽水循环的方式主要有两种,即(自然循环)和 (强制循环)。查看更多
HIMA的ESD系统的SOE时间与趋势记录时间问题? hima input and output specificationinputs type year uint month uint day uint enter date bool hour uint minute uint second uint enter time bool minute pulse bool hour pulse bool day pulse bool year uint month uint day uint hour uint minute uint second uint millisecond uint minute pulse bool hour pulse bool day pulse bool function information short information about the block block information general block information general description of block function function informationused to set and change the date and time of the pes for synchronizing the time with external systems general block informationgeneral block informationvalid from operating system bs41/51 v6.0-6 (9636) bs51-m, h, hr v6.0-6 (9636) bs11 v6.0-6 (9636) bs51 a1 v6.0-6 (9636) bs41q/51q v7.0-7 (9737) special features may only be programmed once in the user program. block may only be used in the program type. reload (load program), change permitted use in safety controllers with tüv test permitted assignment rule if one of the first four inputs is assigned, then all four must be assigned. this also applies to the next four inputs. the date and time must always be complete. generalthe block is used to externally set or change the date and time of the pes. the date and time can therefore be set as boolean variables. it is also possible to synchronize the time for event recording for external systems. the block's outputs carry the current date and time and the minute, hour and day pulses. notes on the assignment of inputs/outputsyeartype: uint this input must be assigned if a date input is assigned. value of the year number to be read in (2-digit). range 0...99 monthtype: uint this input must be assigned if a date input is assigned. value of the month number to be read in. range: 1...12 daytype: uint this input must be assigned if a date input is assigned. value of the day number to be read in. range: 1...31 enter datetype: bool this input must be assigned if a date input is assigned. the values present at the year, month and day inputs are read in when a positive-going edge change occurs. the date is not entered if invalid values are present. hourtype: uint this input must be assigned if a time input is assigned. hour value to be read in. range: 0...23 minutetype: uint this input must be assigned if a time input is assigned. minute value to be read in. range: 0...59 secondtype: uint this input must be assigned if a time input is assigned. second value to be read in. range: 0...59 enter timetype: bool this input must be assigned if a time input is assigned. the values present at the hour, minute and second inputs are read in when a positive-going edge change occurs. the time is not entered if invalid values are present. minute pulsetype: bool the minutes are synchronized when a rising trigger occurs. if the second value is less than 30 it is set to equal 0. if the second value is greater than or equal to 30 it is set to equal 0 and the minute value is increment by 1. hour pulsetype: bool the hours are synchronized when a rising trigger occurs. if the minute value is less than 30, the minute and second values are set to equal 0. if the minute value is greater than or equal to 30, the minute and second values are set to equal 0 and the hour value is increment by 1. day pulsetype: bool the days are synchronized when a rising trigger occurs. if the hour value is less than 12, the second, minute and hour values are set to equal 0. if the hour value is greater than or equal to 12, the second, minute and hour values are set to equal 0 and the day value is increment by 1. yeartype: uint current year of the controller as a 2-digit number (0...99). monthtype: uint current month of the controller as a 2-digit number (1...12). daytype: uint current day of the controller as a 2-digit number (1...31). hourtype: uint current hour of the controller as a 2-digit number (0...23). minutetype: uint current minute of the controller as a 2-digit number (0...59). secondtype: uint current second of the controller as a 2-digit number (0...59) millisecondtype: uint current millisecond of the controller as a 3-digit number (0...999). minute pulsetype: bool a true signal with t = 1 cycle time is output for each full minute, when the second value = 0. hour pulsetype: bool a true signal with t = 1 cycle time is output for each full hour, when the second value = 0 and minute value = 0. day pulsetype: bool a true signal with t = 1 cycle time is output for each full day, when the second value = 0, minute value = 0 and hour value = 0.查看更多
PROII入门及经典例集? 看起来不错,楼主辛苦了查看更多
来自话题:
液体储罐盛装液体的时候顶部需不需要预留空间? 不是的,贮罐有一个最大充装量,150上要求是不超过95%,而如果是移动的,气体等,充装率会有更严格的要求,目前我接触的是不超过90%查看更多
简介
职业:广东重仪机械工程服务有限公司 - 安全工程师
学校:湘潭大学 - 化学学院
地区:河北省
个人简介:他清早的问候,他深夜的短信,他送来的礼物,不是因为他爱你,只是他无聊至极。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