问题：加热炉进料量变化对加热炉操作有何影响？如何处理？...

Saturday, January 18, 2025

问题：管壳式换热器在使时，冷热流体的流向是如何选择的？...

Sunday, February 16, 2025

问题：地蜡特点是触变性，化学安定性和气密性差。...

Friday, June 20, 2025

问题：管子的连接有哪几种方式？...

Tuesday, July 1, 2025

问题：地蜡结晶呈细小针状。...

Friday, June 20, 2025

问题：同一种原油的馏份油，馏份越窄，含地蜡越少，油收率越高。...

Friday, April 25, 2025

问题：离心泵在开泵前要做哪些工作？...

Friday, June 20, 2025

问题：炼油厂中，压力和温度较高以及腐蚀性较强的流体在换热器内一般应走管程。...

Saturday, July 19, 2025

问题：加热炉烟道气中含有哪些气体和有害物质？...

Tuesday, July 1, 2025

问题：易结垢或夹带有固体颗粒在换热器内一般应走壳程。...

Saturday, July 19, 2025

问题：简述泵偷停的现象及处理方法。...

Friday, April 25, 2025

问题：加热炉进料量变化对加热炉操作有何影响？如何处理？...

Friday, June 20, 2025

问题：润滑油具有润滑，密封，减振，卸荷和防锈等作用，不具有冷却冷却作用。...

Wednesday, September 25, 2024

问题：HG-24润滑油用于离心泵。...

Saturday, July 19, 2025

问题：瓦斯线为何要使用压控？...

Friday, June 20, 2025

问题：炼油厂中在换热器内适应走壳程的流体有哪些？...

Tuesday, March 18, 2025

问题：单位质量的某种气体在一定压力下变成同温度的液体时所放出的热量叫做该气体的汽化热。...

Sunday, February 16, 2025

问题：糠醛精制后，润滑油基础油的哪些主要性质发生变化？...

Saturday, July 19, 2025

问题：轴承发热及损坏有哪些原因？...

Saturday, January 18, 2025

问题：减少大气污染的措施有哪些？...

Thursday, May 1, 2025