The Improvement Research Of Clean Production Technology By ADC Foaming Agent

ADC foaming agent is a chemical foaming agent, mainly used in PVC, polyethylene, polypropylene, polystyrene, processing of synthetic materials such as ABS resin and EVA.In this paper, elaborated the main source of sewage generated is the lower yield and higher by-products, through the analysis of original production process based on literature of translation and production processes with principle of combining the actual production process of ADC blowing agent in Zhejiang Juhua Co., Ltd. Improve of clean production technology by refining process, condensation process, and technical improvement of oxidation process of hydrate hydrazine synthesis.Improved synthesis system of sodium hypochlorite, equipment structure system of hydrazine hydrate synthesis; optimized the reactant concentration, reactant ratio, reaction temperature control Sec indicators in synthesis of hydrazine hydrate and get to improved optimization of the concentration of hydrazine hydrate indicators, reduction of pollutants and reduce consumption from source. We mixed of 11% sodium hypochlorite solution and urea solution into the reactor though the volume ratio of 1:3~ 4 when the temperature is 30℃, control the section of the cold reaction temperature about 20℃, residence time 1 ~ 3 seconds into the 100 ~ 110℃high temperature reaction section , 25 ~ 30 seconds residence time to obtain the concentration of hydrazine hydrate containing 50g / l of the crude hydrazine.Improved refining process of hydrazine hydrate, we select the Purification of calcium chloride hydrate because of geting the hydrazine hydrate that containing sodium carbonate content are relatively low, reducing the difficulty of treatmenting the condensation of mother liquor with containing hydrazine waste water ,and providing the technical support of achieve cleaner production, comparative frozen hydrazine hydrate and calcium chloride Refining Refining of hydrazine hydrate production process.Separat the mother liquor and washing solution completely, through the use of new technology, new equipment, and use of centrifugation, washing machine of complete the centrifugation of biurea and ADC, washing process.Treatment the different concentrations of sewage classificaty, and industrial water can be reduced by 50% consumption.A variety of technical improvements can raw materials consumption, decrease energy consumption and the production cost by test of practice in industrial production. reduce the total amount of Sewage and the difficulte of treatment waste water . some sewage can be utilization.