(1. 南京工業(yè)大學(xué) 化工學(xué)院，南京 210009；2. 中國科學(xué)院 過程工程研究所，北京 100080；
3. Department of Mining, Materials Engineering, McGill University,
3610 University Street, Montreal, Quebec, H3A 2B2, Canada)
摘 要: 對含少量CaSO4的NaCl-Na2SO4-H2O鹵水體系中結(jié)垢的抑制技術(shù)進(jìn)行研究，15~75 ℃時通過等溫溶解方法測定工業(yè)鹵水中(NaCl 300 g/L；Na2SO4 20 g/L)硫酸鈣的溶解度，得出其結(jié)垢原因。開發(fā)一種新型吸附劑，可以選擇性去除鹵水中過飽和硫酸鈣，以達(dá)到抑制CaSO4結(jié)垢的目的。結(jié)果表明：鹵水中硫酸鈣過飽和度的去除率與加入吸附劑的質(zhì)量成比例；15 ℃時，當(dāng)加入吸附劑的量為1.50 g/L時，15 min內(nèi)過飽和的去除率就可達(dá)到75.2%，溫度對吸附劑過飽和度去除率影響也較為顯著，溫度越高，去除速率越快。
關(guān)鍵字: 二水硫酸鈣；過飽和度；吸附劑；鹵水；
（1. School of Chemical Engineering, Nanjing University of Technology, Nanjing 210009, China;
2. Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100080, China;
3. Department of Mining and Materials Engineering, McGill University, 3610 University Street,
Montreal, Quebec, H3A 2B2, Canada）
Abstract:The inhibition of CaSO4 scale formation in concentrated NaCl-Na2SO4 brines was studied. The cause of scale formation was obtained by measuring the solubility of calcium sulfate dihydrate in the industrial brines(NaCl: 300 g/L; Na2SO4: 20 g/L) at temperature ranging from 15 to 75 ℃ with the aid of dissolution method. A novel sorbent obtained through the surface modification of calcium sulfate crystal was synthesized, which could selectively remove supersaturated calcium sulfate in the brines. Furthermore, it was found that the elimination ratio of supersaturation was directly proportional to the quality of sorbent. The elimination ratio was 75.2% only in 15 min when the sorbent was 1.50 g/L at 15 ℃. The effect of temperature on the absorption rate is remarkable. The higher the temperature, the faster the absorption rate.
Key words: calcium sulfate dihydrate; supersaturation; sorbent; brines
