焦化废水回用的腐蚀控制

【作者】 韩姝娜；

【导师】 王风云； 雷武；

【作者基本信息】 南京理工大学 ， 物理化学， 2005， 硕士

【摘要】 根据焦化废水的污染物浓度及其水质特性,选择较为经济的处理方法——缺氧—好氧（A-O）法,结合混凝预处理方法,进行处理模拟试验。实验尽量模拟真实工业处理焦化废水的条件,焦化废水的COD_Cr为3920mg/L。混凝试验筛选出以PFS为絮凝剂,浓度为11.6mg/L,高岭土为助凝剂加入量为每100mL焦化废水加入0.05g,为最佳投入量。建立A-O法处理流程小型模拟系统,改变填料和温度等实验条件,得到最佳的处理效率为75.76%,出水的COD_Cr最低为约750mg/L。如果要对焦化废水进行回用,须对焦化废水进行稀释。稀释水为长江水和腾州深井地下水。进行废水回用于冷却循环水系统的实验。对冷却循环水系统的腐蚀、结垢和微生物三个主要问题研究解决方法。进行腐蚀挂片试验和缓蚀阻垢试验,确定了针对于回用焦化废水的较为有效的药剂和配方,筛选出SH0443H和SH0415ZH两个配方对回用的焦化废水的结垢和缓蚀的处理效果较好。进行微生物控制动态模拟试验,明确了废水回用于冷却循环水系统对系统的微生物的生长的影响。COD_Cr是85mg/L的回用废水不会造成循环水系统中微生物的大量生长致使出现生物粘泥。经过试验,得到稀释的焦化废水回用对冷却循环水系统产生的影响,初步可以确定焦化废水回用具有实际意义。更多还原

【Abstract】 Abstract: According to the concentration of the pollution in the coke plant wastewater and its characteristic, choosing a practical wastewater treatment method -anaerobic-oxidizing (A-O)method, combining with the coagulant sedimentation, to do the mimic experiments. The experiments were close to the industrial conductions. The CODCr- of the coke plant wastewater before treatment was 3920mg/L. By the coagulant sedimentation ,the best adding concentration of PFS as the flocculating agent was 11.6mg/L.The adding concentration of kaoline as the coagulant aid was 0.5g/L .Building a mini mimic A-0 treating system and changing the fillers and temperature got the best efficiency. It was 75.76%. The minimum of CODcr was about 750mg/L. If the coke plant wastewater would be reuse to the cooling water system, the wastewater must be diluted by the clean water. There were two kinds of the clean water. They were the Changjing River water and the deep well subsurface water in Tengzhou. There are three important problems They are the corrosion , scaling and the biofouling. The methods to deal with the three problems would be found. The efficient pharmaceutical and the formula were found by the coupon test. The formulas SH0443H and SH0415ZH were better for the corrosion and scaling controlling in cooling water system. The influence of the microbe growing of the coke plant wastewater reused to the cooling water system was clear by microbe controlling experiment. The reusing wastewater which COD was 85mg/L could not make the microbe grow too fast to make the biofouling. By the series of experiments of treatment and reusing, the tentative results were got that the diluted coke plant wastewater reusing to the cooling water system has the actual meaning.更多还原