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Cooling Water System The cooling for the process units is provided by a fresh water cooling water system. Cooling water is sent to the various users throughout the process at 33‘C and returns at 43‘C. The entire cooling water stream will flow past the Cooling Water Expansion Drum, 27-V-0105, which removes any bubbles from the system. The Cooling Water Expansion Drum sits at the highest point of the system and is open to the atmosphere. A gas detector sits at the outlet of the vent pipe and will alarm if any hydrocarbons are released from the coolingwater.
From the Cooling Water Expansion Drum, the water is pumped using the Cooling Water Pumps, 27-P-0104 A/B/C, which work in a 3x 50 %arrangement with two pumps online and one spare. The pump discharge flows to the Cooling Water /Seawater Exchangers, 27-E-0101 A/B/C, where the cooling water is cooled to 33‘C against seawater. The exchangers are plate and frames and, like the pumps, are designed as 3 x 50 %to allow for two exchangers to be online with one spare. The cooling water is then sent to the cooling water supply header to be distributed around the process.
冷却水系统 加工站的冷却是由淡水冷却水系统提供的。冷却水被送至各种用户，流经处理站时温度为33℃，返回时温度为43℃。整体冷却水流首先通过冷却水膨胀罐Cooling water Expansion Drum27-V-0105，膨胀罐去除系统中的任何气泡bubble。冷却水膨胀罐位于该系统的最高点并且是向大气开放的。通风管Vent pipe出口处outlet安装有一个气体探测器gas detector，探测器会发起警报一旦探测出从冷却水中释放有任何烃类。
冷却水泵组Cooling Water Pumps27-P-0104A/B/C从冷却水膨胀罐抽水，以3*50%的状态工作，其中2台工作，一台备用。泵释放水流至冷却水/海水交换器组Cooling Water/Seawater Exchangers27-E-0101A/B/C，通过海水给冷却水降温至33℃。交换器组是板框架式Plate and frames，如同冷却水泵组以3*50%的状态工作，设计为2台工作，一台待用。随后，冷却水被送至冷却水供水联箱cooling water supply header分布于处理站各处。 | 
发表于 2013-5-28 20:48
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