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1 前言在甲胺磷农药生产中 ,废水中和罐的防腐蚀是一件较为困难的事。由于废水中含有一定浓度的盐酸、甲醇、次氯酸盐、甲胺磷等 ,ｐＨ值为 2～3,具有很强的酸性。这种强酸性废水在中和罐中用氢氧化钠中和后 ,要求控制 ｐＨ值在 9～ 1 1 ,再经下道工序回收甲醇。中和罐在酸碱
1 Preface In the production of methamidophos, anti-corrosion of waste water and tank is a more difficult task. As the wastewater contains a certain concentration of hydrochloric acid, methanol, hypochlorite, methamidophos, etc., pH 2 to 3, has a strong acidity. This strong acid wastewater neutralized with sodium hydroxide in the neutralization tank, the required control of pH 9 ~ 1 1, and then recovered by the next process methanol. Neutralization tank in acid