Technology Research Of Recycling Ammonium Chloride From Waste Water Of Glycine Producing And Treatment Of Condensed Water

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.