【Daily Question 2019】Hydrogen production and hydrogenation section – Question No. 038
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This post was last edited by Internet Invisible Man on 2019-2-7 at 14:09. [Daily Question 2019] Hydrogen production and hydrogenation section – Question No. 038: What precautions should be taken when cooling down a hot oil pump after it stops operating? Reference answer: Close the inlet valve, outlet valve, and preheating valve tightly ； The cooling water for each section cannot be stopped immediately; it must wait until the temperature of each section drops to normal levels before the water supply can be halted ； When cooling down, be careful not to use cold water on the pump body to avoid thermal expansion and contraction; also, make sure to turn the pump shaft manually every 15–30 minutes until the temperature of the pump body drops below 100°C. (Unless otherwise specified, all questions and answers are based on hydrogenation units.) ) Correct: 3 wealth, Incorrect: 1 wealth ； Mass posting of posts – rated based on the lowest score ； Replies that are unrelated to the answer are considered spam and will be deleted immediately. For management purposes, if you need to view content from a few days ago, please go to https://bbs.hcbbs.com/home.php?mod=space&uid=3862647&do=thread&view=me&from=space through the summary post below
Close the inlet valve, outlet valve, and preheating valve tightly； The cooling water for each section cannot be stopped immediately; it must wait until the temperature of each section drops to normal levels before the water supply can be halted ； When cooling down, be careful not to use cold water on the pump body to avoid thermal expansion and contraction; also, make sure to turn the pump shaft manually every 15–30 minutes until the temperature of the pump body drops below 100°C.
(1) Close the inlet valve, outlet valve, and preheating valve tightly. (2) The cooling water for each section cannot be stopped immediately; it must wait until the temperature of each section drops to normal levels before the water supply can be halted. (3) When cooling down, never pour cold water on the pump body to prevent thermal expansion and contraction; also make sure to turn the pump shaft manually every 15–30 minutes until the temperature of the pump body drops below 100°C.
: Close the inlet valve, outlet valve, and preheating valve tightly
Close the inlet valve, outlet valve, and preheating valve tightly； The cooling water for each section cannot be stopped immediately; it must wait until the temperature of each section drops to normal levels before the water supply can be halted ； When cooling down, be careful not to use cold water on the pump body to avoid thermal expansion and contraction; also, make sure to turn the pump shaft manually every 15–30 minutes until the temperature of the pump body drops below 100°C.
Close the inlet valve, outlet valve, and preheating valve tightly； The cooling water for each section cannot be stopped immediately; it must wait until the temperature of each section drops to normal levels before the water supply can be halted ； When cooling down, be careful not to use cold water on the pump body to avoid thermal expansion and contraction; also, make sure to turn the pump shaft manually every 15–30 minutes until the temperature of the pump body drops below 100°C.
(1) Close the inlet valve, outlet valve, and preheating valve tightly. (2) The cooling water for each section cannot be stopped immediately; it must wait until the temperature of each section drops to normal levels before the water supply can be halted. (3) When cooling down, never pour cold water on the pump body to prevent thermal expansion and contraction; also make sure to turn the pump shaft manually every 15–30 minutes until the temperature of the pump body drops below 100°C.
Close the inlet valve, outlet valve, and preheating valve tightly； The cooling water for each section cannot be stopped immediately; it must wait until the temperature of each section drops to normal levels before the water supply can be halted ； When cooling down, be careful not to use cold water on the pump body to avoid thermal expansion and contraction; also, make sure to turn the pump shaft manually every 15–30 minutes until the temperature of the pump body drops below 100°C.
1. During the cooling process, the turbine shaft must be rotated simultaneously to prevent deformation caused by uneven local temperatures during cooling； 2. Maintain normal supply of cooling water and lubricating oil