Treatment process for sewage of acid leaching of quartz sand by hydrochloric acid

The invention discloses a treatment process for sewage of acid leaching of quartz sand by hydrochloric acid. According to the process provided by the invention, a pH value pre-regulating equipment isadded on the basis of a current technology, so that the pH value of the sewage of the acid leaching by the hydrochloric acid is improved from 1 to about 4-5, on the basis, a two-stage pH value in-series treatment process is adopted, NaOH is added twice, so that the pH value is continuously improved to 7-8 to meet reaction conditions of a subsequent coagulating agent, so as to ensure that the sewage can stably reach the standard. 本发明公开了一种盐酸酸浸石英砂污水处理工艺，该工艺主要在现有工艺基础上，增加pH值预调节设备，使得盐酸酸浸污水的pH值由1提高至4～5左右，在此基础上，采用两级pH值串联处理工艺，通过二次投加NaOH，将pH值继续提高至7～8之间，以满足后续混凝药剂的反应条件，确保污水能够稳定达标。