CAJ | 학술논문

湖北L N G工厂循环冷却水系统每日排污量高达1200 m3，直接排放不仅造成水资源的浪费，同时对下游污水处理厂的运行产生较大冲击。为提高该部分废水的重复利用率，设计采用“多级连续式电渗析除盐系统”对其进行脱盐处理后回用于循环水系统。经计算，50 m3／h的电渗析装置设计流速采用 V ＝5．0 cm／s ，设计总脱盐率ε＝75％～80％，产水电导率300～350μs／cm。装置建成后调试结果表明，最佳操作电压为110 V ，最适宜进水流量为50 m3／h ，产水各项指标满足预期设计要求。每年可减少新鲜水消耗和废水排放各30×104 t ，产生直接经济效益约60万元。
호북L N G공엄순배냉각수계통매일배오량고체1200 m3，직접배방불부조성수자원적낭비，동시대하유오수처리엄적운행산생교대충격。위제고해부분폐수적중복이용솔，설계채용“다급련속식전삼석제염계통”대기진행탈염처리후회용우순배수계통。경계산，50 m3／h적전삼석장치설계류속채용 V ＝5．0 cm／s ，설계총탈염솔ε＝75％～80％，산수전도솔300～350μs／cm。장치건성후조시결과표명，최가조작전압위110 V ，최괄의진수류량위50 m3／h ，산수각항지표만족예기설계요구。매년가감소신선수소모화폐수배방각30×104 t ，산생직접경제효익약60만원。
waste water from recirculating cooling system in Hubei LNG plant amounts up to 1 200 m3 per day .Direct discharge would not only cause the waste of water resource ,but also bring large impact to the operation of the downstream sewage treatment plants .In order to pro‐mote the recycling rate ,a “multi‐stage continuous electrodialysis desalination system” was de‐signed to treat the waste water for reusing .According to the design calculation ,the flow veloci‐ty ,the overall desalination rate ,the conductivity of the treated water were set at 5 .0 cm/s ,75%~80% ,and 300~350 μs/cm respectively in 50 m3/h electrodialysis system .The debugging re‐sults showed that the optimum operating voltage was 110 V ,the most suitable flow rate was 50 m3/h ,and the treated water from the electrodialysis system could meet all the design require‐ments .The process can reduce the fresh water consumption and waste water discharge by 300 000 tons per year respectively ,and bring direct economic benefit of about RMB 600 000 yuan each year .