本文選題：旋流器 + 固液分離��； 參考：《東北石油大學(xué)》2017年碩士論文

【摘要】：本文介紹了旋流器磨蝕位置以及影響旋流器磨蝕的因素,包括結(jié)構(gòu)參數(shù)、操作參數(shù)等,分析了旋流器磨蝕的原理、特性以及發(fā)展現(xiàn)狀。創(chuàng)新性提出在旋流器磨蝕嚴(yán)重部位安裝可更換的內(nèi)嵌小錐,既穩(wěn)定旋流器內(nèi)部流場,促進(jìn)了旋流器的分離效率,又減緩了固體顆粒對旋流器壁面的磨蝕,降低能量損耗,延長旋流器使用壽命,減少設(shè)備投資。基于促進(jìn)旋流器二次分離以及減緩固體顆粒對旋流器壁面磨蝕的設(shè)計思想設(shè)計了內(nèi)嵌固液旋流器。應(yīng)用三維建模軟件Solidworks和計算流體動力學(xué)軟件Fluent以壓力損失作為指標(biāo)對內(nèi)嵌固液旋流器初始模型進(jìn)行網(wǎng)格獨立性檢驗,確定初始網(wǎng)格形式,得到旋流器的初始物理模型。進(jìn)而利用正交試驗手段對旋流器進(jìn)行結(jié)構(gòu)參數(shù)優(yōu)化,研究了旋流器外錐角、內(nèi)嵌小錐錐角、排砂孔大小以及外錐段上部分長度變化對固液兩相分離效率的影響規(guī)律和影響程度。同時,利用單一變量法,對操作參數(shù)進(jìn)行優(yōu)選,分析了流量及分流比變化對旋流器速度特性、壓力特性及分離性能的影響。通過旋流器分離過程跡線圖以及固體顆粒在旋流器內(nèi)的運動軌跡研究了固體顆粒對旋流器壁面磨蝕規(guī)律,發(fā)現(xiàn)內(nèi)嵌固液旋流器由于筋板的阻斷,使固體顆粒做類似豎直運動,降低了運行速度,減緩壁面磨蝕。同時研究了粒徑大小和入口顆粒濃度對旋流器壁面磨蝕率的影響規(guī)律。介紹了室內(nèi)試驗的試驗方案和試驗系統(tǒng),并通過對內(nèi)嵌固液旋流器進(jìn)行室內(nèi)試驗,實驗數(shù)據(jù)與模擬數(shù)據(jù)一致,得出溢流口長度、排砂孔尺寸、流量、底流分流比對固相分離效率的影響規(guī)律。介紹了室內(nèi)試驗的試驗方案和試驗系統(tǒng),并通過對氣液固三相分離旋流器進(jìn)行室內(nèi)試驗和數(shù)值模擬分析,得出氣相溢流管伸入長度、脫氣錐段錐角、流量、氣相溢流分流比和底流分流比對液相溢流口壓力損失、氣相分離效率及固相分離效率的影響。
[Abstract]:This paper introduces the grinding position of hydrocyclone and the factors affecting the erosion of hydrocyclone, including structure parameters and operation parameters, etc. The principle, characteristics and development status of the erosion of hydrocyclone are analyzed. It is innovatively put forward to install replaceable inlay cone in the serious part of the hydrocyclone, which not only stabilizes the internal flow field of the hydrocyclone, promotes the separation efficiency of the cyclone, but also slows down the erosion of the wall of the hydrocyclone by solid particles and reduces the energy loss. Prolong the service life of hydrocyclone and reduce the investment of equipment. Based on the design idea of promoting the secondary separation of hydrocyclone and slowing the erosion of solid particles to the wall of the hydrocyclone, the embedded hydrocyclone is designed. Using the three-dimensional modeling software Solidworks and the computational fluid dynamics software Fluent to test the grid independence of the initial model of the embedded hydrocyclone with pressure loss as the index, the initial grid form is determined and the initial physical model of the hydrocyclone is obtained. Furthermore, the structure parameters of the hydrocyclone are optimized by orthogonal test. The influence of the external cone angle, the small cone angle embedded in the cyclone, the size of the sand discharge hole and the length of the outer cone segment on the solid-liquid two-phase separation efficiency is studied. At the same time, the single variable method is used to optimize the operation parameters, and the influence of flow rate and shunt ratio on the speed, pressure and separation performance of hydrocyclone is analyzed. Based on the track diagram of the separation process of the hydrocyclone and the motion track of the solid particles in the hydrocyclone, the law of solid particle erosion on the wall of the hydrocyclone is studied. It is found that the solid particles make the solid particles do similar vertical motion due to the blockage of the stiffener in the inlay liquid cyclone. The speed of operation is reduced and the erosion of the wall surface is slowed down. At the same time, the influence of particle size and inlet particle concentration on the wall abrasion rate of hydrocyclone was studied. This paper introduces the test scheme and test system of the indoor test, and through the indoor test of the embedded liquid cyclone, the experimental data are consistent with the simulated data, and the length of the overflow port, the size of the sand discharge hole and the flow rate are obtained. The effect of bottom flow separation ratio on solid phase separation efficiency. This paper introduces the test scheme and test system of the indoor test, and through the laboratory test and numerical simulation analysis of the gas-liquid-solid three-phase separation cyclone, obtains the length of the gas overflow pipe, the cone angle of the degassing cone, and the flow rate. The effects of gas overflow ratio and bottom flow diversion ratio on the pressure loss, gas phase separation efficiency and solid phase separation efficiency at the overflow outlet of the liquid phase.
【學(xué)位授予單位】：東北石油大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：TQ051.84

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本文編號：1936034