【作者】 杨春光；

【导师】 赵景利；

【作者基本信息】 河北工业大学 ， 化工过程机械， 2003， 硕士

【摘要】 目前国内甘氨酸生产厂家排放的工业废水中含有多种污染物。其中主要含有一定量的氯化铵、少量的乌洛托品及微量的有机物。此废液的直接排放是对资源的严重浪费并且造成了严重的环境污染。为了文明生产，节约资源，治理此废水势在必行。 本文对甘氨酸生产中排放的工业废水进行了综合治理实验研究，确定了治理此废水的工艺路线和操作环境。即采用三效真空蒸发兼用热泵技术回收废水中氯化铵的工艺路线。此工艺克服了采用常规蒸发技术从低浓度氯化铵废液中提取氯化铵带来的能耗大、对设备腐蚀性强的缺点。 在回收氯化铵的蒸发过程中，废水中所含的乌洛托品分解为氨和甲醛，这些氨和甲醛又随蒸汽的冷凝溶入冷凝水中，致使冷凝水不能达标排放，这两种污染物使得冷凝水的化学需氧量(CODcr)高达30000mg／L。为了避免环保指标不合格的冷凝水对环境造成的二次污染，本文提出了吹脱法和催化氧化法并用的方案，对冷凝液中的氨氮和甲醛进行了治理，通过实验研究，最终排放废液的化学需氧量(CODcr)达到GB 8978-1996所规定的标准。更多还原

【Abstract】 At present, a lot of pollutants such as certain amount of ammonium chloride, a small quantity of urotropine and only a little oganic molecular compound are contained in the waste water from glycine factory in our country. Draining the waste water not only results in severe resource waste but also leads to serious environment pollution. In order to civilize glycine production and save resource, it is very imperative to treat the sewage.Comprehensive experimental research of the waste water treatment from glycine production was made in the paper, technology route and operational environment for the waste water treatment were established. A technology route which can recycle ammonium chloride in the waste water was adopted by comprehensive analysis of all kinds of factors. Both jet pump and three effects vacuum evaporation were used in the technology process. The defects such as great consumption of resource and prominent corruption of equipment in the normal evaporation technology of abstracting ammonium chloride from light concentration ammonium chloride solution were conquered by using the new technology process.In the course of evaporation for recycling ammonium chloride, ammonia and formaldehyde decomposed from urotropine in the waste water were dissolved in the condensed water with the condensation of vapor. The two pollutants make CODcr of condensed water reach 30000mg/L, so the condensed water fall short of the national standard. For the sake of avoiding second pollution , the condensed water which contained ammonia and formaldehyde was treated by blowing and catalytic oxidation through a great deal of experiments in the paper. Finally, the CODcr of condensed water come up to GB-1996.更多还原