【Daily Question No. 336】2018.12.08
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This post was last edited by Internet Invisible Man on 2018-12-7 at 22:49. [Daily Question No. 336] What precautions should be taken when draining condensate from a hydrogen compressor on 2018.12.08? ⑴In a certain order, from low to high. ⑵When opening the valve, ensure that the back pressure behind the valve is lower than the pressure in front of the drain valve. ⑶The valve should be opened slowly, and the opening degree should not be too large. ⑷Pay close attention to the condensate level. (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
Open all inlet valves and pay attention to changes in the pumping pressure difference. Open the medium-pressure steam gate valve; the main steam valve is in the closed position. Open the main steam valve to drain condensate. Open the turbine drain valve and start the startup vacuum pump until the vessel vacuum level reaches 0.01 MPa. Slightly open the main steam valve to use steam to warm up the machine, until no condensate is discharged; at that point, the drain valves on the turbine and main steam valve can be closed.
(1) Lubricating oil system ① Check that local indicating instruments such as pressure gauges and thermometers are complete and in good condition. ②Check the condition of the lubricating oil in the engine’s oil reservoir; if the quality of the oil is unsatisfactory, it should be replaced with fresh oil. The oil level should be maintained at 1/2 to 2/3 of the mark on the oil sight gauge. ③Activate the lubricating oil system and set the filter switch lever in the correct position. ④Open the inlet and outlet valves of the auxiliary pump, open the outlet valve of the main shaft pump, start the auxiliary lubricating oil pump. Once the oil pump is running steadily, check whether the oil temperature and pressure are within the specified range. The circulating water for the oil cooler is put into use as appropriate. ⑤Fill the spare filter and spare oil cooler slowly with oil. (2) Airtightness check and nitrogen purging before driving: *A nitrogen seal should be applied before ensuring airtightness; the injection pressure for this nitrogen seal is generally 0.1~0.2 MPa. ①Check whether the compressor inlet valve, outlet valve, and vent valve are closed; if they are not properly closed, close them, and activate the safety valve at the same time. ②Open the pressure gauge valves for each line. ③Open all the vent valves and bottom drain valves of the unit, and put the oil collector into operation. ④Slightly open the nitrogen valve at the inlet, slowly introduce nitrogen into the compressor until the airtight pressure is reached, and then close it. ⑤Check the compressor, auxiliary equipment, and pipelines for leaks. ⑥Open the vent valve on the outlet pipeline to release the gas inside the machine, and then close it. ⑦After passing the airtightness test, replace the air with nitrogen following the airtight nitrogen filling procedure. ⑧During nitrogen purging, open each drain valve to drain the condensate and then close them.
⑴In a certain order, from low to high. ⑵When opening the valve, ensure that the back pressure behind the valve is lower than the pressure in front of the drain valve. ⑶The valve should be opened slowly, and the opening degree should not be too large. ⑷Pay close attention to the condensate level.
In order from low to high, the valve should be opened slowly. When opening the valve, ensure that the back pressure behind it is lower than the pressure before the drain valve; the degree of opening should not be too large. During drainage, pay close attention to changes in the liquid level
It should be done slowly, and care must be taken not to let the oil level in the condenser drop to zero; if gas escapes, it will be a disaster.
⑴In a certain order, from low to high. ⑵When opening the valve, ensure that the back pressure behind the valve is lower than the pressure in front of the drain valve. ⑶The valve should be opened slowly, and the opening degree should not be too large. ⑷Pay close attention to the condensate level.
⑴In a certain order, from low to high. ⑵When opening the valve, ensure that the back pressure behind the valve is lower than the pressure in front of the drain valve. ⑶The valve should be opened slowly, and the opening degree should not be too large. ⑷Pay close attention to the condensate level.
Maintain good communication between the field crew and those operating inside the facility; open the valves slowly, monitor the trend of liquid level decline, and pay close attention to any changes in pressure
This post was last edited by maysee on 2018-12-8 at 16:59. ⑴In a specific order, from low to high. ⑵When opening the valve, ensure that the back pressure behind the valve is lower than the pressure in front of the drain valve. ⑶The valve should be opened slowly, and the opening degree should not be too large. ⑷Pay close attention to the condensate level.