sparging conditions, which will improve heat transfer and start the stripping off the most low temperature volatile compounds.
脱气后的脱色油，首先在新型弧形真空节能器 VHE703，真空最终加热器 中被脱嗅油逐步加热，然后通过高压蒸汽在新型弧形VHE704中被加热到脱嗅所需的温度。该所需的温度则通过高压锅炉G760的高压蒸汽来保持。在新型弧形真空最终加热器 中自动控制VHE704样有利于热交换并使大部分低沸点的挥发物在进入脱嗅之前中被，汽油提在出真去空。和喷射蒸汽的喷射条件下被加热，这
The oil flows by gravity from VHE Final Oil Heater VHE704 to the distributor in the stripping section of the Deodorizer DEO710. The distributor evenly spreads the oil across the column cross-section, and the oil trickles down the structured packing, where it flows as a thin layer on an extended surface. In the column the oil meets stripping steam in counter-current flow. Volatile compounds such as fatty acids and various odoriferous compounds are distilled off by the joint action of the vacuum and the stripping steam. The counter-current flow regime in the column reduces the amount of sparging steam drastically compared to the traditional tray system.
在重力作用下，油从新型弧形真空最终加热器VHE704，流向脱嗅塔DEO710极汽膜则高均提。，匀在蒸因地汽填此把的料，组层油大合分内作，配减用油到少下与塔了被对的喷流快填射的速料蒸汽横汽掉截提的面。蒸用与汽的量接传各进统触个而的部发减分生板少式传。了油塔质真相过滴空比程沿系着，，统填在挥动发填料力物料层蒸层：并汽在内如的其发游消生离巨耗的脂大量肪逆的酸流扩汽展方、提表式各部面分的种上的蒸异分味馏形成，物配一由质器于在。层其真分薄空效的配和率油器。
The oil then flows from the stripper to the holding trays which have an adjustable
holding time independent of capacity. Here the bulk of the stripping steam is
introduced. The steam is injected through sparge pipes evenly in each tray by separate distribution
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PROCESS DESCRIPTION - DEODORIZATION 工艺描述－脱嗅
systems. The total consumption of stripping steam is 0.6% of the oil feed rate. During holding, some heat sensitive compounds in the oil are decomposed by thermal action resulting in colour reduction. Also various unstable oxidized compounds will be broken down resulting in more stable oil.
油从汽提段进入保持塔盘，在这里通入一定量的汽提蒸汽，蒸消耗一般不超过进油量的 汽通过喷射管均匀的喷出，塔盘层的汽提蒸汽0.6%，不较大稳定操的作氧弹化性物被破坏从而使油脂在更保稳持定段，一保些持热时敏间物根质据通油过的热流反量应和被需裂要解可并随达时到调热整脱或色锁的定目固定。时同间时
Any condensed matter in the vapor ducts will be collected in the Splash Oil Tank T776 and removed by means of steam blowing. The splash oil can be recycled back either to the Bleached Oil Tank T770 or to the bleaching section depending on quality.
汽提管道中的冷凝物质用飞溅油罐T776收集并通过蒸汽压力清空，飞溅油既可回流到脱气油罐T770依据质量进入脱色工段。 也可
After heat bleaching, the deodorized oil from DEO710 will flow by gravity to the VHE Economizer VHE703.The deodorized oil is re-generatively cooled down in the VHE703 under vacuum and sparging conditions.Some odoriferous compounds produced in oil
during hot conditions are promptly removed. Citric acid is injected into the oil in VHE703 at temperature below 150oC. The steam in the holding section and the ；VHE703 is directed to form the stripping steam in the stripping section. The oil is discharged by the Economizer Pump P703 and cooled in the Bleaching Economizer E600 (Bleaching Section). After final cooling in the Final Oil Cooler E706, the oil is filtered in the Polishing Filter and sent to storage.
脱嗅过的油在真空和蒸汽喷射状态下在 VHE703除去，柠檬酸抗氧化剂在 节能器内逐步冷却，一些在热条件下产生的异味物质在此被VHE703中加入。保持层和VHE703节能器中通入的直接蒸汽被用于脱嗅塔DEO710中汽提段的汽提气体，油通过泵P703输送到节能器E600中换热冷却，然后在最终冷却器E706中用冷却水冷却，再经抛光过滤器F783/4过滤并储存。 ACID OIL RECOVERY 酸油的回收
In order to recover fatty acids and other condensable components in the vapour as well as minimize effluent pollution and minimize the load on the vacuum system, vapours from the Deodorizer DEO710 are cooled in the scrubber section. The vapour passes through a packed bed in the scrubber where the fatty acids and other volatiles are condensed by contact with circulated cooled distillate. The recovered fatty acid distillate is accumulated in a tank where the desired level is automatically maintained by controlled discharge to storage. The temperature of the recycled distillate is maintained automatically at about 60篊 in the Fatty Acid Cooler E705.
为了回收游离脂肪酸和其他气体中的冷凝物质，同时减少污染和降低真空系统的负荷，脱嗅塔 DEO710被的循气环体在的冷安脂置肪于酸脱冷嗅却塔。气提回收段的上脂部肪酸捕提集取器物中在被脂冷肪却酸。罐气 体通过捕集器的填料床时脂肪酸和其它挥发物 质中T775自动保持，
循环的脂肪酸在脂肪酸冷却器 积累，该罐设定的液位通过控制排放过程来E705中保持60篊。
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PROCESS DESCRIPTION - DEODORIZATION 工艺描述－脱嗅
SHUTDOWN OF DEODORIZING SECTION 脱嗅工段的停车
During shut-down of Deodorizing section, i.e. when there is no regenerative cooling, the oil is cooled by recirculation through the deodorizer. This will ensure the gentle cooling down of the deodorizing system.
在统的脱温嗅度工缓段慢停降车下期来间， 比如，当没有节能冷却时，通过脱嗅塔大循环可使油冷却下来。这样可保证把脱嗅系
Residual bleached oil in Bleached Oil Tank T770 will be operated at low level. The bleached oil will be pumped and heated as normal operation to the deodorizer. The deodorized oil will be regeneratively cooled by heat recovery with the bleached oil in the VHE Economizer VHE703 to temperature about 130篊. As bleaching section has stopped, the Bleaching Economizer E600 will be by-passed and the Final Oil Cooler E706 will cool the oil further to 100篊 (and eventually below 60篊). This oil will be re-circulated back to the，Bleached Oil Tank T770 until the complete batch of oil has achieved the desired quality. Then the final oil heating will be shutdown and the circulation will proceed until the batch temperature reaches below 60篊 and finally sent to refined oil storage. By then, the system temperature will be gently lowered. The slow shutdown duration will take approximately 2? hours. This will ensure the gentle cooling down of the deodorizing system and therefore prevent thermal stress of the
equipments. The deodorizing system should only be exposed to atmospheric pressure only when the temperature in the system is below 60oC. This is to prevent oxidation of the system as well as safety precaution.
把脱色油罐T770内残存油走到低液位。脱色油按正常操作泵入到脱嗅塔，而出塔油在节能器 VHE703度降到 中温130篊，因为脱色工段已经停了下来，脱嗅油走节能器E600的旁路进到最终冷却E706一步中温度进100篊（最终可降到60篊）并还返回到色罐T770后，停加热炉，循环至温度直到整个系统的所有油达到质量指标，然60篊耗时 为止把油送至成品油储罐。此时，温度被缓慢降了下来大约2?小时缓慢降的好处为消除设备的热应力。脱嗅系统的温度只有降到60篊空，这样可避免油的氧化和保护设备的安全。
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PROCESS DESCRIPTION - DEODORIZATION 工艺描述－脱嗅
CLOSED LOOP COOLING SYSTEM 闭路循环冷却系统
The vapors from the vacuum systems are condensed by recirculating barometric water. The barometric water is recirculated via the hot well to the barometric condensers of the vacuum systems by means of the barometric water pump. Before entering the barometric condensers of the vacuum system the recirculating barometric water is cooled in two of the closed loop coolers by chilled water. This primary cooling water remains clean while the circulating barometric water is gradually polluted by small amounts of fat and/or fatty acids still remaining in the suction vapors from the vacuum systems. To prevent rapid clogging of the closed loop coolers a small amount of lye is added to the water in the hot well via caustic dosing tank and caustic dosing pump. The