本文關(guān)鍵詞： 協(xié)同作用 優(yōu)化配置 阻垢緩蝕 效率　出處：《西安工程大學(xué)》2015年碩士論文　論文類型：學(xué)位論文

【摘要】：摘要：循環(huán)冷卻水的結(jié)垢、腐蝕以及污水對(duì)水體的污染是工業(yè)循環(huán)冷卻水主要的問(wèn)題。本文以尿素和馬來(lái)酸酐作為原料合成PASP,通過(guò)與其他天然或高效阻垢緩蝕劑的優(yōu)化配置,制備多功能綠色水處理劑。并在模擬的高濃縮倍數(shù)循環(huán)冷卻水中,對(duì)單一和優(yōu)化配置的阻垢緩蝕劑的阻垢緩蝕性能進(jìn)行評(píng)定。通過(guò)SEM法和紅外光譜法對(duì)垢樣和腐蝕產(chǎn)物進(jìn)行表征和對(duì)阻垢緩蝕機(jī)理進(jìn)行一定的研究。實(shí)驗(yàn)選取PASP、PAA、葡萄糖酸鈉和單寧酸作為實(shí)驗(yàn)的水處理劑。本文采用碳酸鈣阻垢法和鼓泡法進(jìn)行阻垢性能評(píng)價(jià),通過(guò)對(duì)其阻垢劑濃度、鈣離子濃度、水浴溫度、水浴時(shí)間和復(fù)配比例等因素的研究表明：PASP和PAA具有較好的阻垢性能,其阻垢效率達(dá)到83%和90%左右；葡萄糖酸鈉的阻垢效率較低,但是具有一定的分散作用；單寧酸具有一定的阻垢作用,但因其本身性質(zhì)不是很穩(wěn)定,最后用氫氧化鈉對(duì)其進(jìn)行改性,改性后的阻垢性能穩(wěn)定且阻垢效率達(dá)到60%。PASP+PAA具有協(xié)同作用,其阻垢效率能達(dá)到92%；而PASP+葡萄糖酸鈉、PASP+單寧酸鈉在阻垢方面不存在協(xié)同作用,但是其阻垢效率明顯大于葡萄糖酸鈉或者單寧酸阻垢時(shí)的效率。在作用機(jī)理方面,PASP、PASP+PAA和PASP+單寧酸鈉除了螯合增容作用外,主要是由于阻垢劑吸附在碳酸鈣晶體的表面,使晶體發(fā)生畸變。PASP+葡萄糖酸鈉中除了螯合增容和吸附作用之外,因葡萄糖酸鈉具有凝聚與分散的作用,垢樣易于清洗。采用靜態(tài)掛片法和旋轉(zhuǎn)掛片法對(duì)緩蝕性能進(jìn)行評(píng)價(jià),通過(guò)對(duì)其阻垢劑濃度、pH、水浴溫度、水浴時(shí)間以及復(fù)配比例的研究表明：PASP和PAA具有穩(wěn)定且較好的緩蝕效率,其緩蝕效率達(dá)到80%和70%；葡萄糖酸鈉在緩蝕方面效率較高達(dá)到80%；單寧酸和改性后的單寧酸鈉具有一定的緩蝕作用,且單寧酸鈉的緩蝕率大于單寧酸。在復(fù)配藥劑中,PASP+PAA、PASP+葡萄糖酸鈉和PASP+單寧酸鈉均有明顯的協(xié)同作用。在作用機(jī)理方面,PASP+PAA在碳鋼表面有吸附作用,使碳鋼表面形成了一層保護(hù)膜,從而有效的抑制腐蝕。]PASP+葡萄糖酸鈉和PASP+單寧酸鈉主要是在碳鋼表面形成一層沉淀膜對(duì)金屬表面進(jìn)行保護(hù)。
[Abstract]:Abstract: scale, corrosion and sewage pollution of circulating cooling water are the main problems of industrial circulating cooling water. In this paper, urea and maleic anhydride are used as raw materials to synthesize PASP. The multifunctional green water treatment agent was prepared by optimizing the configuration of the scale and corrosion inhibitor with other natural or high efficiency scale and corrosion inhibitors. The multi-function green water treatment agent was used in the simulated high concentration multiple circulating cooling water. The scale and corrosion inhibition performance of single and optimized scale and corrosion inhibitor was evaluated. The scale samples and corrosion products were characterized by SEM and infrared spectroscopy, and the mechanism of scale and corrosion inhibition was studied. PASP. PAA, sodium gluconate and tannic acid were used as experimental water treatment agents. The scale inhibition performance of PAA, sodium gluconate and tannic acid was evaluated by using calcium carbonate scale inhibition method and bubbling method. The concentration of scale inhibitor, calcium ion concentration and water bath temperature were evaluated. The study on the water bath time and the ratio of water bath to PAA shows that the scale inhibition efficiency is about 83% and 90%, and the scale inhibition efficiency of the two groups is about 83% and 90%. The scale inhibition efficiency of sodium gluconate is low, but it has some dispersing effect. Tannic acid has a certain scale inhibition effect, but its properties are not very stable, finally it was modified with sodium hydroxide. The modified scale inhibition performance is stable and the scale inhibition efficiency reaches 60%. PASP PAA has synergistic effect, and its scale inhibition efficiency can reach 92%. However, PASP sodium gluconate has no synergistic effect on scale inhibition, but its scale inhibition efficiency is obviously higher than that of sodium gluconate or tannic acid. In addition to chelating compatibilization, PASP PAA and PASP sodium tannin are mainly due to the adsorption of scale inhibitor on the surface of calcium carbonate crystal. In addition to chelating compatibilization and adsorption, sodium gluconate has the function of agglomeration and dispersion. The scale sample is easy to be cleaned. The corrosion inhibition performance is evaluated by static hanging plate method and rotating hanging plate method. The scale inhibitor concentration is pH and the water bath temperature is determined. The study on the water bath time and the ratio of water bath to PAA shows that the water bath and PAA have stable and good corrosion inhibition efficiency, and the inhibition efficiency reaches 80% and 70 respectively. The corrosion inhibition efficiency of sodium gluconate is 80%. Tannic acid and modified sodium tannate have certain inhibition effect, and the inhibition rate of sodium tannin is higher than that of tannic acid. PASP sodium gluconate and PASP sodium tannate have obvious synergistic effects. PASP PAA adsorbs on the surface of carbon steel in the mechanism of action. A protective film was formed on the surface of carbon steel, which effectively inhibited corrosion.] Sodium PASP gluconate and sodium PASP tannate mainly formed a precipitation film on the surface of carbon steel to protect the metal surface.
【學(xué)位授予單位】：西安工程大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：TQ085.4

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相關(guān)期刊論文 前1條

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本文編號(hào)：1461824