本文關鍵詞： 反滲透海水淡化 轉子式能量回收裝置 表面造型 效率 扭矩　出處：《天津大學》2015年碩士論文　論文類型：學位論文

【摘要】：能量回收裝置作為反滲透海水淡化系統(tǒng)的重要組成部分,被用來回收從反滲透膜組件中排出的高壓濃鹽水中的壓力能,對大幅度降低海水淡化系統(tǒng)的能耗具有決定性作用。轉子式能量回收裝置是目前應用最廣泛的產(chǎn)品類型之一,具有能量回收效率高,出水壓力穩(wěn)定,處理量靈活,安裝體積小等優(yōu)點。然而,轉子式能量回收裝置存在轉子通道內(nèi)流體存在壓力突變現(xiàn)象和動密封效果不佳的問題。本論文通過首次引入端面造型技術,應用于轉子式能量回收裝置,對端盤表面進行造型。完成了裝置在造型前后的對照實驗,改進了轉子式能量回收裝置的上述不足之處。首先,本論文通過在端盤表面進行均壓槽造型的方法,提高轉子轉動的穩(wěn)定性。在間隙為0.05 mm,轉子轉速為500 rpm,操作壓力為1.0-6.0 MPa的工況條件下,分別完成了裝置在進行端面均壓槽造型前后的對照實驗。實驗數(shù)據(jù)表明,壓力為6.0 MPa時,在進行均壓槽造型前后,裝置的扭矩由27 N?m降低到22 N?m,降幅為18%,裝置的能量回收效率由82%提高到88%。結果表明,端面均壓槽造型技術對提高轉子式能量回收裝置性能具有一定效果。然后,本論文通過在端盤表面進行螺旋淺槽造型的方法,在小間隙情況下減少裝置的扭矩,解決裝置間隙值與扭矩之間的矛盾。在間隙為0.035 mm,壓力為1.0-6.0 MPa,轉子轉速為500 rpm工況下,研究先完成了裝置在端面螺旋淺槽造型前后的對照實驗。實驗數(shù)據(jù)表明,壓力為6.0 MPa時,在進行螺旋淺槽造型前后,裝置的扭矩從13 N?m降低到7 N?m,降幅為46%,裝置的效率由62%提高到85%。結果證明,應用螺旋淺槽造型的方法,可以很好地解決裝置間隙與扭矩之間的矛盾,從整體上提高裝置的性能。研究還完成了,具有螺旋淺槽造型的裝置,在間隙為0.025 mm,壓力為1.0-6.0 MPa,轉子轉速為500 rpm工況下的運行實驗。結果表明,間隙縮小以后,壓力為6.0 MPa時,裝置的效率達到96.3%,這一效率值完全可以滿足工業(yè)應用需求(不低于90%)。同時,這一技術還可應用于其它具有相似結構和工況條件的流體機械設備,提高流體的密封效果,延長密封件的使用壽命。
[Abstract]:As an important part of reverse osmosis seawater desalination system, the energy recovery device is used to recover the pressure energy from the high-pressure concentrated salt water discharged from the reverse osmosis membrane assembly. Rotor type energy recovery device is one of the most widely used products at present, with high energy recovery efficiency, stable effluent pressure and flexible treatment capacity. However, the rotor energy recovery device has the problems of sudden change of fluid pressure in the rotor channel and poor dynamic sealing effect. In this paper, the technology of end surface modeling is introduced for the first time. Applying to rotor type energy recovery device, the end disk surface is molded. The control experiment of the device before and after molding is completed, and the above deficiencies of rotor type energy recovery device are improved. In this paper, the stability of rotor rotation is improved by the method of equalizing pressure grooves on the end disk surface. Under the condition that the clearance is 0. 05 mm, the rotor speed is 500rpm, and the operating pressure is 1. 0-6. 0 MPa, the stability of rotor rotation is improved. The experimental results show that when the pressure is 6.0 MPa, the torque of the device changes from 27 N? M reduced to 22 N? The energy recovery efficiency of the device was increased from 82% to 88. The results show that the face equal pressure slot molding technology has some effect on improving the performance of the rotor type energy recovery device. In this paper, the method of spiral shallow groove modeling on the end disk surface is used to reduce the torque of the device in the case of small clearance, and to solve the contradiction between the gap value and the torque. Under the condition of the clearance 0.035mm, the pressure 1.0-6.0 MPa, the rotor speed 500 rpm. The experimental results show that when the pressure is 6.0 MPa, the torque of the device changes from 13N to 13N before and after the molding of the spiral shallow groove. M reduced to 7 N? The efficiency of the device was increased from 62% to 85. The results show that the contradiction between the gap and torque of the device can be well solved by using the method of shallow spiral groove modeling, and the overall performance of the device has been improved. When the gap is 0.025 mm, the pressure is 1.0-6.0 MPA, and the rotor speed is 500 rpm, the device with spiral shallow groove is operated. The results show that the pressure is 6.0 MPa after the clearance is reduced. The efficiency of the device is up to 96.30.This efficiency value can completely meet the needs of industrial applications (no less than 90 parts). At the same time, this technology can also be applied to other fluid mechanical equipment with similar structures and operating conditions to improve the sealing effect of the fluid. Extend the service life of sealing parts.
【學位授予單位】：天津大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：P747.5

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本文編號：1536497