本文關(guān)鍵詞：提高油田含聚污水沉降罐處理效果技術(shù)研究　出處：《東北石油大學(xué)》2015年碩士論文　論文類(lèi)型：學(xué)位論文

  更多相關(guān)文章： 沉降罐 含聚污水 處理效果 數(shù)值模擬 實(shí)驗(yàn)研究

【摘要】：隨著聚合物驅(qū)油技術(shù)在油田的廣泛應(yīng)用,采出污水的性質(zhì)發(fā)生了重大變化,出現(xiàn)了含聚濃度高、水質(zhì)粘度大等特點(diǎn),導(dǎo)致現(xiàn)有的污水處理裝置和設(shè)備出現(xiàn)了處理效果差的問(wèn)題�；谥亓υ矸蛛x的沉降罐結(jié)構(gòu)簡(jiǎn)單、處理量大,是油田污水處理中的重要設(shè)備,其脫水效果的優(yōu)劣直接影響后續(xù)過(guò)濾罐的處理負(fù)荷和處理效果,繼而影響水質(zhì)達(dá)標(biāo)。因此,研究沉降罐內(nèi)的流場(chǎng),確定重力分離的影響因素,據(jù)此開(kāi)展氣浮、藥劑優(yōu)選、結(jié)構(gòu)改進(jìn)等研究提高沉降罐處理效果,對(duì)于生產(chǎn)實(shí)際具有重要意義,具體研究?jī)?nèi)容如下:首先以沉降罐內(nèi)的流場(chǎng)作為研究對(duì)象,采用離散相模型進(jìn)行數(shù)值模擬,得到沉降罐內(nèi)速度場(chǎng)分布,較多的污水在靠近罐壁的區(qū)域進(jìn)行沉降;根據(jù)油滴運(yùn)動(dòng)軌跡長(zhǎng)度、停留時(shí)間等揭示了油滴的運(yùn)動(dòng)特性,沉降罐內(nèi)存在返混流和漩渦流。然后通過(guò)室內(nèi)靜態(tài)沉降實(shí)驗(yàn),建立了含油量、懸浮物含量隨沉降時(shí)間的變化關(guān)系,并考察含油、含聚污水中的油滴粒徑分布規(guī)律,得到含聚濃度、油滴粒徑、沉降時(shí)間對(duì)沉降除油效果的影響,實(shí)驗(yàn)結(jié)果與模擬結(jié)果規(guī)律吻合。對(duì)比氣浮-沉降預(yù)處理模擬實(shí)驗(yàn)和靜沉實(shí)驗(yàn)可知,氣浮-沉降顯著提高了除油率和懸浮物去除率,分別達(dá)到30%以上和15%以上�；跉飧�-沉降預(yù)處理模擬實(shí)驗(yàn)優(yōu)選出25mg/L的聚合氯化鋁鐵和5mg/L陰離子聚丙烯酰胺溶液作為絮凝劑,以及具有極性-非極性分子結(jié)構(gòu)的浮選劑FJ,其濃度為25mg/L。由現(xiàn)場(chǎng)調(diào)參試驗(yàn)可知,僅通過(guò)延長(zhǎng)沉降時(shí)間的做法并不能持續(xù)提高處理效果,采用連續(xù)收油工藝罐內(nèi)水質(zhì)更穩(wěn)定,較間歇收油時(shí)懸浮物去除率和除油率分別高出5.96%和8.14%。最后,以改善流場(chǎng)、提高處理效果為目標(biāo),提出了一種新型雙環(huán)形穿孔配水裝置,使除油率提升了12.9%。
[Abstract]:With the development of polymer flooding technology widely used in oilfield, mining has undergone major changes in the nature of sewage, the polymer containing high concentration, the water quality characteristics of high viscosity, leading to the existing sewage treatment device and equipment processing effect is poor. The principle of gravity separation and sedimentation tank based on simple structure, large capacity, is an important equipment in the oilfield wastewater treatment, the dehydration effect directly affect the processing load and the subsequent treatment effect of the filter tank, then the impact of water quality standards. Therefore, research on the settlement flow tank, determine the influence factors of gravity separation, flotation agent is preferably carried out, and Study on structural improvement to improve the settling tank treatment effect. Is of great significance for the actual production. The specific contents are as follows: firstly the sedimentation tank flow field as the research object, using the discrete phase model of numerical simulation, obtained in settling tank The distribution of velocity field, many sewage settlement near the tank wall area; according to the droplet trajectory length, residence time reveals the movement characteristics of oil droplets, the sedimentation tank in memory and backmix flow vortex flow. Then through indoor static sedimentation experiment, established oil content, suspended solids content changes with the settling time, and the effects of oily sewage in the oil droplet size distribution, with the polymer concentration, droplet size, settling time on the settlement of oil removing effect, experimental results and simulation results are consistent with law. The pretreatment experiments and static settling experiment comparison of flotation and flotation and settlement, the settlement was significant to improve the rate of removing oil and suspended solids removal rate of more than 30% and 15% respectively. The pretreatment experiment selected 25mg/L poly aluminum ferric chloride and anionic polyacrylamide solution 5mg/L as flocculant sedimentation flotation based on the And with the flotation agent FJ polar nonpolar molecule structure, the concentration of 25mg/L. by adjusting parameter test shows that only by prolonging the settling time of the practice can not continue to improve the treatment effect, with the continuous oil collection process of the tank water is more stable than the intermittent oil collection of suspended solids removal rate and oil removal the rate increased 5.96% and 8.14%. finally, to improve the flow, improve the treatment effect as the goal, put forward a new type of double circular perforated water distribution device, the oil removal rate increased by 12.9%.

【學(xué)位授予單位】：東北石油大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類(lèi)號(hào)】：X741

【參考文獻(xiàn)】

相關(guān)期刊論文 前1條

1 陸耀軍,薛敦松;油水重力分離數(shù)學(xué)模型[J];石油學(xué)報(bào)(石油加工);1999年03期

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本文編號(hào)：1427914