【Daily Question No. 012】2017.01.12
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This post was last edited by 955559 on 2017-7-31 at 16:03. [Daily Question No. 012] On 2017.01.12, what are the functions of the two control valves located at the top of the filtered crude oil buffer tank? ( ) Reply to see the reference answers; scoring is possible by identifying the key points. (Unless otherwise specified, all questions and answers are based on hydrogenation units.) ) When the pressure in the buffer tank of the crude oil after filtration is low, valve A opens to increase the pressure; when the pressure is high, valve B opens to release pressure. Summary post of Q&A questions for 2017 (updates ongoing): http://bbs.hcbbs.com/thread-1657793-1-1.html Summary post of daily questions for 2017 (updates ongoing): http://bbs.hcbbs.com/thread-1657794-1-1.html Summary post of Q&A questions for 2016 (already updated): http://bbs.hcbbs.com/thread-1597792-1-1.html Xin Chang Cup – 2016 HaiChuan Top 10 Selection – Please recommend candidates: http://bbs.hcbbs.com/thread-1654112-1-1.html Third-phase evaluation for outstanding management members at HaiChuan: http://bbs.hcbbs.com/thread-1655902-1-1.html (Source: HaiChuan Chemical Forum)
Maintain stable pressure in the tank, purge
Isolate from air and maintain pressure at the top of the tank
Intake and exhaust, with the purpose of controlling pressure
Adjust the inflow and outflow flow rates and pressure of the gas seal gas
Two control valves form a split-range control system to maintain a certain pressure, preventing the raw oil from coming into contact with air and forming large particles such as gums, while also providing a certain head pressure for the feed pump. . .
When the pressure is normal, both valves are fully closed; when the pressure is low, the intake valve opens to increase the pressure, and when the pressure is high, the pressure relief valve opens to release pressure
Pressure replenishment, pressure release (they don’t have to be two, right{:3_54:})
Supply nitrogen to prevent oxygen from entering the oxidized feed oil, and provide head pressure for the feed pump