低温蒸发处理核工业废水的研究-化学工艺专业论文.docxVIP

Abstract Nuclear industry wastewater is a kind of untreatable wastewater that contains not only a great deal of dissolved salt but also some quantity of radioactive substance. Nowdays, it is still a difficult problem in wastewater treatment field to treat effectively the nuclear industry wastewater. The radioactive wastewater from the North Nuclear Fuel Component Limited Company is mostly refining uranium wastewater from this company’s nuclear fuel component preparation process that contains uranium and ammonium nitrate. This wastewater still contains small quantity of radioactive substance and a great deal of dissolved salt after treated with silica gel adsorption. To resolve the difficult problem of treating the radioactive wastewater from the North Nuclear Fuel Component Limited Company, this paper put forward treating nuclear industry wastewater with low-temperature evaporation refer to the features of this wastewater. The pollution of the nuclear industry wasteater to environment will be eliminated entirely if the wastewater is evaporated at low temperature, the condensate is collected and utilized and the residual wastewater crystal is cement solidificated in turn. Furthmore, a process for treating nuclear industry wastewater with low-temperatrue evaporation has been developed refer to the wastewater’s discharge, which supplys referrence for resolving the difficult problem of treating the radioactive wastewater of the North Nuclear Fuel Component Limited Company. The low-temperatrue evaporation was studied to treat the nuclear industry wastewater. The process parameters of low-temperatrue evaporation were optimized with orthogonal experiment. In terms of various factors, higher vacuum degree avails decreasing operating temperature、reducing consumption of energy and heightening processing capacity but also augments the condensate’s chemical oxygen demand(COD)；lower pH value can reduce the ammonia nitrogen concentration of the condensate but augments its c