本文選題：電容去離子 + 海水淡化　； 參考：《大連理工大學(xué)》2014年碩士論文

【摘要】：水資源的缺乏使海水淡化技術(shù)的研發(fā)更加緊迫。與傳統(tǒng)的反滲透和低溫多效蒸發(fā)海水淡化技術(shù)相比,電容去離子技術(shù)作為新興的脫鹽技術(shù),具有能耗低、無污染等優(yōu)勢,擁有廣闊的發(fā)展前景。 本文首先對比分析了類一級反應(yīng)動力學(xué)模型與摩爾凈化速率模型。結(jié)果表明,類一級反應(yīng)動力學(xué)模型適用范圍小,由于其物理意義不明確,實用性有限；摩爾凈化速率模型物理意義明確,可用于研究各因素對過程的影響,更適用于過程的模擬與分析,并對模型再生階段電阻進(jìn)行修正,使其更加吻合實際情況。 根據(jù)選取的模型,分別研究了參數(shù)對最小出水濃度及最小出水濃度時間的影響。結(jié)果表明,最小出水濃度隨著電壓與電容的增大而減小,隨著流量、流道體積以及死區(qū)體積的增大而增大；最小出水濃度時間隨著流量增大而減小,隨著電容以及死區(qū)體積的增大而增大。為了降低過程能耗,提出分段電壓模型,通過編程分別計算單模塊、雙模塊以及三模塊的出水情況,對比能耗,結(jié)果表明三模塊和雙模塊與單模塊相比能耗分別降低26.80%和12.22%。 為了控制死區(qū)體積,進(jìn)行了流場分析。建立了三種波紋狀優(yōu)化結(jié)構(gòu),進(jìn)行了模擬優(yōu)化分析,并且研究了流速對流場的影響。結(jié)果表明,壁面的幾何結(jié)構(gòu)簡單化以及在一定范圍內(nèi)采用低流速可以弱化死區(qū)的形成。 運(yùn)用摩爾凈化速率模型,進(jìn)行了日處理量50噸的電容去離子海水淡化模塊化工程設(shè)計。得到了海水淡化流程如下：通道串聯(lián)數(shù)目為10的裝置共20個,同時運(yùn)行,充液2.5min,通電工作10min,然后反向通電靜置3min進(jìn)行再生,最后排污2.5min,完成一個處理循環(huán)。
[Abstract]:The lack of water resources makes the research and development of desalination technology more urgent. Compared with traditional reverse osmosis and low-temperature multi-effect evaporation desalination technology, capacitive desalination technology, as a new desalting technology, has the advantages of low energy consumption and no pollution, and has a broad development prospect. In this paper, the first order reaction kinetic model and the molar purification rate model are compared and analyzed. The results show that the first-order reaction kinetic model has a small application range, because of its unclear physical meaning and limited practicability, and the molar purification rate model has a clear physical meaning, so it can be used to study the influence of various factors on the process. It is more suitable for the simulation and analysis of the process, and modifies the resistor in the regenerating stage of the model to make it more consistent with the actual situation. According to the selected model, the effects of parameters on the minimum effluent concentration and the minimum effluent concentration time were studied. The results show that the minimum effluent concentration decreases with the increase of voltage and capacitance, and increases with the increase of flow rate, flow channel volume and dead zone volume, and the minimum effluent concentration time decreases with the increase of flow rate. It increases with the increase of capacitance and dead zone volume. In order to reduce the energy consumption of the process, a piecewise voltage model is put forward, and the effluent conditions of one module, two modules and three modules are calculated by programming, and the energy consumption is compared. The results show that the energy consumption of the three modules and two modules is reduced by 26.80% and 12.22%, respectively, compared with that of the single module. In order to control the dead zone volume, the flow field is analyzed. Three corrugated optimization structures were established, simulated and optimized, and the effect of flow velocity on the flow field was studied. The results show that the geometric structure of the wall is simplified and the formation of the dead zone can be weakened by the use of low velocity in a certain range. Based on the molar purification rate model, the modularization engineering design of deionized seawater desalination with a capacity of 50 tons per day was carried out. The process of seawater desalination is as follows: 20 units with 10 channels in series, running at the same time, filling liquid for 2.5 minutes, working for 10 minutes, then reverse-electrifying static 3min to regenerate, finally discharging water for 2.5 minutes, completing a treatment cycle.
【學(xué)位授予單位】：大連理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：P747

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