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根据清洁生产原理、间二硝基苯生产工艺及废水产生情况,提出了“重结晶废水直接回用于精制,精制废水蒸馏后回用于精制洗涤和重结晶”的清洁生产工艺;经小试4次和中试3次废水循环套用后产品均为优等品,证明清洁生产工艺对产品质量无不良影响,可实现工艺废水零排放。
According to the principle of cleaner production, the production process of m-dinitrobenzene and the production of waste water, a clean production process of “reclaiming reclaimed wastewater directly for refining, refining waste water for reuse in refined washing and recrystallization” was proposed. Small test 4 times and pilot 3 times after the recycling of waste water are superior products, that clean production process without adverse impact on product quality, process wastewater can be zero discharge.