英语翻译c.反渗透装置（膜组）反渗透是整个脱盐系统的执行机构,其作用是脱除水中的可溶性盐份、胶体、有机物及微生物.系统设

英语翻译
c.反渗透装置（膜组）
反渗透是整个脱盐系统的执行机构,其作用是脱除水中的可溶性盐份、胶体、有机物及微生物.系统设置3套反渗透,每套净出力219m3/h,回收率不小于75%,总脱盐率不低于97%（寿命期内）.反渗透膜采用日本东丽公司的TML20-370型抗污染反渗透膜元件,此型号反渗透膜的长度为40〃,直径8〃,膜面积370平方英尺（34m2）,单根膜脱盐率为99.5%.每套反渗透采用一级两段设计,采用62支7米长的压力容器,成41:21排列,每支压力容器内装7根膜,每套反渗透用434支膜,4套反渗透共1736支膜.平均膜通量为14.7LMH,符合超滤产水的反渗透设计导则,并有很大余量.
c.反渗透清洗系统
反渗透运行压力一般在1.3-1.8MPa,在反渗透膜组长期运行后,会受到某些难以冲洗掉的污染,如长期的微量盐份结垢和有机物的积累而造成膜组件性能的下降,运行压力升高,所以必须用化学药品进行清洗,以恢复其正常的除盐能力.在采用超滤作为预处理的情况下,每3个月清洗一次,每次清洗约2-4小时.本系统设置1套清洗装置,由1台不锈钢保安过滤器、2台清洗泵（1用1备）和1个清洗药箱组成.清洗装置采用自动操作.
d.反渗透冲洗系统
反渗透系统设置自动冲洗系统,以反渗透产水为水源对膜元件表面进行冲洗,以防止污染物沉积在膜表面.本系统设置2台冲洗泵（1用1备）和1台冲洗水箱.
e.控制仪表
为了控制、监测反渗透系统正常运行,还配有一系列在线测试仪表,包括电导率表、流量计、压力表、取样装置和高低压保护开关等控制和监测仪表.反渗透操作为全自动,浓水排放流量根据管线上安装的稳流阀来固定,产水设高压保护爆破膜.

c.RO unit (membrane array)
RO unit is the actuator of the whole desalting system,whose role is to remove soluble salts,colloids,organic compounds,and microorganisms in the water.The unit is equipped with three set ROs,each has 219m3/h net output,more than 75% recovery rate,and more than 97% total desalting rate (within the life-term).RO membrane adopts TML20-370 anti-contamination RO membrane element produced by Japan Toray Company [Length:40〃; Diameter:8〃; Membrane area:370 square feet (34 m2); Single membrane desalting rate:99.5%].Each set RO adopts design of two-sections per grade (需要自己核实) and 62 seven-meter-long pressure containers lining in 41:21 matrix,each pressure container is internally equipped with seven membranes,thus each RO set needs 434 membranes and a total of 1736 membranes for 4 sets.The mean membrane flux is 14.7LMH being in accordance with super-filtration water RO design guideline and having large margins.
c.RO cleaning unit
RO pressure is generally operating at 1.3-1.8MPa.After long-term running,RO membrane array may be contaminated by some contaminations uneasy to be washed off,for example,long-term accumulation of trace salt scales and some organic compounds can result in declining of the performance of the membrane modules and higher running pressure,and therefore,RO membrane array must be cleaned with some chemicals to recover its normal desalting function.When super-filtration was used as pretreatment,it should be cleaned every 3 months,and every cleaning lasts about 2-4 hours.The unit is equipped with a set of cleaning equipment including a stainless steel safeguard filter,two cleaning pumps (1 in use & 1 for preparation) and a cleaning agent tank.The cleaning unit is operated automatically.
d.RO washing unit
RO system is equipped with automatic washing unit,which washes the membrane element surface with RO-produced water as supply to avoid contamination sediment on the membrane surface.The unit is equipped with two wash pumps (1 in use & 1 for preparation) and a washing tank.
e.Control instrument
Serials of online measuring instruments are equipped to control and monitor the normal running of RO system,including conductivity instrument,flow meter,pressure meter,sampling apparatus,and high-low voltage protecting switch,etc.RO is operated automatically,whose condensed water discharging flow is fixed according to the steady-flow-valve installed in the pipelines,and the produced water is set with high-pressure proof bursting membrane.