本文選題：聚合氯化鋁 + 煤矸石　； 參考：《鄭州大學(xué)》2015年碩士論文

【摘要】：我國的污水治理狀況比較嚴(yán)峻,因此開發(fā)低價、高效的絮凝劑勢在必行。聚合氯化鋁是一種具有良好絮凝效果的無機(jī)高分子絮凝劑,然而傳統(tǒng)的制備方法過度依賴鋁礦,不利于降低成本和緩解環(huán)境壓力。論文旨在以煉鈣還原渣和煤矸石為原料制備聚合氯化鋁,研究內(nèi)容如下:論文以單因素實驗確定了煤矸石的最佳活化和酸浸條件:煤矸石經(jīng)機(jī)械研磨至粒徑為180μm,在750℃下煅燒2h,得到活化煤矸石,浸出率最高。20g活化煤矸石與110m L質(zhì)量分?jǐn)?shù)為20%的鹽酸反應(yīng)3.5h,Al2O3浸出率能達(dá)到85%以上。向酸浸液中加入15g煉鈣還原渣,在95℃熟化4h后,得到熟化液。利用噴霧干燥或滾筒干燥得到固體產(chǎn)品,Al2O3含量和鹽基度分別為28.3%和68.7%,符合GB/T 22627-2008。紅外光譜表征進(jìn)一步確定其為目標(biāo)產(chǎn)物,熱重分析結(jié)果表明產(chǎn)品的失重分為三個階段。論文研究了PAC對印染污水、焦化污水和生活污水的絮凝效果�？疾炝薖AC投加量、污水p H、攪拌時間、助凝劑PAM等因素的影響,具體結(jié)果如下:在處理印染污水時,調(diào)節(jié)p H=7~8,PAC投加量為105mg/L,慢速攪拌3min~4min,靜置30min。綜合考慮,無需調(diào)節(jié)p H和投加PAM,污水濁度、色度和CODCr的去除率為92%、76%和78%,絮凝效果良好。在處理焦化污水時,調(diào)節(jié)p H=8~10,PAC投加量為170mg/L,快速攪拌1min,慢速攪拌2min,靜置20min,產(chǎn)生的絮體大而密實。在實際操作時,無需調(diào)節(jié)p H,PAC與PAM復(fù)配使用能達(dá)到協(xié)同增效的目的,污水濁度、色度和CODCr去除率分別為95.3%、96.8%、90.5%,投加PAM可分別提高15.8%、5.8%、15.3%。在處理生活污水時,調(diào)節(jié)p H=7~8,PAC投加量為375mg/L,快速攪拌1min,慢速攪拌5min,靜置20min。在不投加PAM的情況下,濁度、CODCr和色度去除率保持在91%、80%、78%以上。論文分析了原料預(yù)處理、煤矸石活化、制備液體PAC、干燥和包裝等過程的工藝參數(shù)和設(shè)備的選擇,并對項目進(jìn)行了投資概算。分析表明,聚合氯化鋁項目具有良好的市場前景。
[Abstract]:The sewage treatment in our country is severe, so it is imperative to develop low-cost and high-efficient flocculant. Polyaluminum chloride is an inorganic polymeric flocculant with good flocculation effect. However, the traditional preparation method is too dependent on bauxite, which is not conducive to reducing the cost and relieving the environmental pressure. The purpose of this paper is to prepare polyaluminium chloride from calcium reduction slag and coal gangue. The research contents are as follows: the optimal activation and acid leaching conditions of coal gangue were determined by single factor experiment. The activated gangue was obtained by mechanical grinding to 180 渭 m particle size and calcined at 750 鈩，

本文編號：2021730