石灰—硫酸亚铁法处理硫酸生产废水的试验研究

Experimental Study on Lime-Ferrous Sulphate Process for Treating Water from Sulphuric Acid Plants

采用两级石灰—硫酸亚铁混凝沉降法处理硫酸生产废水，控制两级处理ｐＨ值分别为９．５和９．０，Ｆｅ／Ａｓ比值分别为２．５和１５。当进水Ａｓ和Ｆ浓度分别为６１和２１３ｍｇ／Ｌ时，经两级处理后，Ａｓ和Ｆ浓度可分别为≤０．１５和≤１３．８３ｍｇ／Ｌ，重金属离子达检不出水平，出水ｐＨ值、Ｆｅ和ＳＳ含量均符合国家排放标准。

A lime-ferrous sulphate process for treating waste water from sulphuric acid plants was studied experimentally at pH 9.5 and 9.0 Fe/As 2.5 and 15, respectively for two continuative treatment stages. When the waste water contained 61 mg/L As and 213 mg/L F, As and F content of the effluent water were≤0.15 mg/L and≤13.83 mg/L, heavy metal ions less than detection limits, and pH, Fe and suspended solid content all up to natonal standard. Protection of Waste Heat Boiler Convection Tubes in a Sulphuric Acid PlantPang Renjie, Kou Hongqing(46) The cause for abrasion of tube bundles in a waste heat boiler was analyzed. Use of angular cover instead of circular one effectively protected tubes from abrasion in scouring of high velocity and dust loading flue gas.