發(fā)布時間：2018-03-27 23:42

  本文選題：熔融結晶　切入點：稀硫酸　出處：《現(xiàn)代化工》2017年11期

【摘要】：提出了采用熔融結晶法濃縮稀硫酸的新工藝。以初始質(zhì)量分數(shù)為5%的稀硫酸溶液為料液進行熔融結晶實驗,在合適的操作條件下成功地將料液濃縮至23%以上,驗證了熔融結晶法濃縮稀硫酸的可行性。建立熔融結晶動態(tài)過程的數(shù)學模型并取得了良好的擬合結果�？疾觳⒎治隽巳廴诮Y晶過程的各操作條件對濃縮過程的影響。結果表明,低過熱度、合適的進料速率、較高的降溫速率對于提高濃縮效率和晶層生長速率有益。對熔融結晶濃縮過程和工業(yè)上常用的蒸發(fā)濃縮過程分別進行了耗能量計算,結果表明,在相同的稀硫酸濃縮程度下熔融結晶濃縮過程的耗能量僅占蒸發(fā)濃縮過程的60%左右。
[Abstract]:A new process of concentrated dilute sulfuric acid by melting crystallization method was proposed. The solution of dilute sulfuric acid with initial mass fraction of 5% was used for melting crystallization experiment, and the material solution was successfully concentrated to more than 23% under suitable operating conditions. The feasibility of concentrated dilute sulfuric acid by melting crystallization method was verified. The mathematical model of melt crystallization dynamic process was established and good fitting results were obtained. The effects of various operating conditions of melt crystallization process on the concentration process were investigated and analyzed. Low superheat, suitable feed rate and high cooling rate are beneficial to increase the concentration efficiency and growth rate of crystal layer. The energy consumption of melt crystallization concentration process and industrial evaporation concentration process are calculated, respectively. The results show that, At the same concentration of dilute sulfuric acid, the energy consumption of the melting crystallization process is only about 60% of that of the evaporation process.
【作者單位】： 天津大學化工學院;太倉中化環(huán)�；び邢薰�;
【分類號】：TQ111.16

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