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海水预处理系统Sea Water Pretreatment

  发电运行有限责任公司

Shaanxi Northwest PowerGeneration Operation Co., Ltd.

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预处理是电厂水处理的第一阶段，主要是针对使用海水、地表水做补给水源，此类水一!"#$%&'$!()*+，,此-./01、23456处理，78水9的"#$，:;7?@A的BCD/EF电G海水补给水(HI 205m3，海水J海水补水KLMN海水预处理

G，JOPQ0RS、T123U、VWXYZ[Q6U处理\]N海水^水U，_\`5海水LMKabN海水cdefE Pretreatment is the frst step o water treatment; it is mainly

or the water source o sea water and surace water, or theycontain a lot o suspending matter and organic matter whichrequire coagulation, sedimentation and fltration to have

suspending matter removed so as to prepare the water ordemineralization !ea water ma"eup water amount or thispower plant is a#out 205m3 !ea water is pumped topretreatment station and $ows through tu#e mi%er,sedimentation pond, air scru##ing gravity fltration pond andfnally $ows into clear water pond &he clear water is thenpumped into desalination equipment

海水预处理系统Sea Water Pretreatment

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海水预处理系统

Sea Water Pretreatment  gh]i海水 海水补给水K VWXYZ[Q6U

海水^水U

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海水预处理系统工艺流程

Procedures of Sea Water

Pretreatment 

Sea Water Sea Water Makeup Water Tank 

Clear Water Pond

Sterilizer  Coagulant Coagulant

Aid

Sea Water Lift PumpDesalination Equipment

Tube

Mixer 

lo!!ulation Sedimentation

Pond

Air "rus#ing $ra%it& iltration Pond

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海水cd系统

'esalination !ystem 

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Overview  海水`5预处理系统，J海水LMK给海水cd系统

Lq海水E海水q水Krstu&v^Y56S，_\`5q水Pw.x海水cdyzE

 &he sea water ater pretreatment is pumped todesalination system #y sea water lit pump!ea water $ows through the sel(cleaningflters at the pump outlet and enters

desalination house through eeding pipes 

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Procedures 

海水cd系统

'esalination !ystem

 

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海水LMK •€56S ‚ƒ56S 海水+„K

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海水cd系统'esalination !ystem

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Procedures Coagulant S!ale ,n#ibitor

Sea Water

Lift Pump Multi-media ilter Safet& ilter Sea Water (P Pump

Energ& +e!o%er& De%i!e

+) De%i!e,ntermediate

Water Tank 

"ra!kis# Water

(P Pump

"ra!kis#

Water  +)

"a!k.as#

Water Tank 

"ra!kis#

Water Tank 

"a!k.as# Water Tank 

,ntermediate Water Pump Demineralization S&stem

Alkali

Con!entrate

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海水cd系统'esalination !ystem

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š›./处理，_\.x‚ƒ56SE’.x‚ƒ56Sœ”，ŒxžŸl¡¢£¤

 

=¥用¦Œ}~§¨ pH ©ª«¬‹®@A9¯°±~?|，Œx{|l是I«¬‹®

 

@A9¯°}~?|%²³?|，Œx´}~µ¶是I«¬·d¸的$.x‹®@A

 

¹E海水的!?()*+，º»`5海水‹®%‰Š水‹®@A，./¼?，¼?\的

 

½¾水.x‰Š水ˆ，_\¿.x\À的0Á./ÂÃ的7?E In the above procedure, coagulant is added to water before multi-media filters to remove

foreign matter such as suspending matter and gel through direct flow coagulation andfiltration. Water then flows through safety filters. Before entering the safety filters, water isdosed with the following three chemicals to achieve corresponding purposes sulphuric acidis dosed to regulate pH value so as to prevent carbonate scaling in the reverse osmosis

!"#$ e%uipment& scale inhibitor is dosed to prevent sulphate scaling and other scaling in the"# e%uipment& 'aHS#(  is dosed to prevent o)idi*ing substance from entering the "#e%uipment. Sea water is of high salinity& it flows successively through sea water "# andbrac+ish water "# to get desalinated. Water after desalination enters brac+ish water tan+,which is prior to deminerali*ation process which will happen in the mi)ed bed.

’“p系统9@f&56S‹ÄY系统、dÅ^Y系统、‹®'ÆÄY系统E he above system contains filter bac+wash system, chemical cleaning system and "#

e%uipment water wash system. 

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系统@AÇpEquipment Description

海水`5@f’主ÈÉ水Kʹ的海水q水K，给海水cd系统Lq海水E海水q水Krstu&v^Y56S，_\`5q水Pw.x海水cdyzEË

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系统@AÇpEquipment Description

56S‹ÄY系统Ë‹Y水ˆ、‹ÄY水K、ÙÚÛÜ'4ÝÞPß、@AÆ°EdÅ^Y系统Ë^Yàˆ、^Y水K、‚ƒ56S4ÝÞPß

@AÆ°Eàál的水一ËÕ΋®的½¾水q给E

+ilter #ac"wash system consists o #ac"wash water tan"s,#ac"wash water pumps, oots #lowers and related pipes andequipment -hemical cleaning system consists o detergenttan"s, clean water pumps, saety flters and related pipes andequipment .ater to dissolve chemicals is generally rom

second stage /