计量泵

>4.5.5.1反渗透加药装置>>a.阻垢剂加药装置>>为了在较高回收率情况下防止反渗透浓水端特别是反渗透压力容器中最后一根膜元件的浓水侧出现碳酸盐、硫酸盐以及Ca2+、Mg2+离子的化学结垢,从而影响膜元件的性能,在反渗透进水前需要加入阻垢剂。本系统选用美国进口阻垢剂,该药剂是一种分散型隐蔽剂,其作用如下:>>·阻垢效能高,原水LSI指数最大允许值为2.8,在此范围内可有效的节制无机物结垢。>>·主要成分为含磷小分子有机物,在水中性质稳定,不易分解产生具有微生物营养的正磷酸盐营养物,排放后也不会对环境产生污染。>>·为优秀的分散剂,可节制铁、铝及重金属污染,也可以对堵塞膜微孔的铁胶体以及细小颗粒起到分散作用。>>阻垢剂加药装置主要包括2台美国Milton Roy公司的电磁隔膜计量泵(1用1备)、1台溶液箱。>>阻垢剂加药节制采用加药计量泵与进水在线流量计的信号输出联锁的节制方法,达到不用人的劳力调节加药量的目的。>>b.还原剂加药装置>>反渗透复合膜要求进水的余氯小于0.1mg/l,加入亚硫酸氢钠等还原剂的目的是中以及来水中余氯等氧化性成分,防止其对反渗透膜元件的损坏。>>本加药装置主要包括2台美国Milton Roy公司的机械隔膜计量泵(1用1备)以及1台溶液箱。加药量可按照在线余氯(ORP)表输出的4-20mA信号不用人的劳力调节,也可手动调节。>>4.5.5.2反渗透系统>>反渗透是目前水处理系统设备中应用最广泛的一种脱盐技术,具有极高脱盐能力,且运行安全、灵活,操作简单。>>反渗透系统包括保安过滤器、高压泵、反渗透膜组、清洗系统、冲洗系统及节制仪表。>>a.保安过滤器>>为防止膜元件在运行过程中被固体颗粒损害,每一套反渗透之前还设有1台5mm的保安过滤器,其作用是截留来自预处理出水中大于5μ的颗粒进入反渗透系统。这种颗粒经高压泵增大压力后可能击穿反渗透膜组件,造成大量漏盐的情况,同时可能会划伤高压泵的叶轮。保安过滤器为不锈钢316材质,滤芯采用美国OSMONICS公司的熔喷聚丙烯滤芯,深层过滤,具有纳污量大、寿命长、易更换的优点。当过滤器进出口压差大于设定值(通常为0.07-0.1MPa)时该当更换。>>b.高压泵>>高压泵为反渗透膜组提供足够的进水压力,维持反渗透膜的正常运行。本系统每一套反渗透入口均设有1台美国Pentair公司生产的卧式多级离心泵,4套反渗透系统设置1台备用泵。>>4.5.5.1 RO dosing unit>>a. Anti-scalant dosing unit>>To avoid carbonates, sulfates, and Ca2+ or Mg2+ c你好cal scales appearing in RO condensed water end, specially in the condensed water side of the last mbrane elent in RO pressure container, hence affecting the performance of the mbrane elentsunder fairly 你好gh recovery rate, anti-scalant is needed to add to RO feed water. The unit adopts anti-scalant imported from America, w你好ch is dispersing maskant (参考:http://www.wanfangdata.com.cn/qikan/periodical.articles/hxtb2/hxtb99/hxtb9909/990914.htm), whose role is as follows:>>•High anti-scale efficiency. The maximum allowable value of LSI index in original water is 2.8, and it can control inorganic scales effectively wit你好n t你好s range.>>•Its major components are small-molecular organic phosphorus compounds, w你好ch have the advantages of water-stability, uneasy to degrade, non-production of microorganism-nutritive n-phosphates, and non-pollution to the environment after discharging.>>•It’s an excellent dispersant, w你好ch can control ferrous-, aluminum- and heavy metal pollution and disperse ferrous-colloids and tiny particles blocking micro-holes in the mbrane.>>The anti-scalant dosing unit mainly includes two America Milton Roy Company electromagnetic diaphragm meter pumps (1 in use & 1 for preparation) and a solution tank.>>Anti-scalant dosing control adopts signal-output-coupled methods of dosing meter pumps and feed water online flow meter to reach to regulate dosage automatically.>>b. Reducer dosing unit>>RO compound mbrane dands less than 0.1mg/l chlorine residue contained in the feed water, and the addition of reducers such as sodium hydrogen sulfite is to neutralize oxidizing components such as chlorine residue contained in the feed water, to avoid their damages to RO mbrane elent.>>The dosing unit mainly includes two mechanically diaphragm meter pumps (1 in use & 1 for preparation) produced by America Milton Roy Company and a solution tank. Dosages can be regulated automatically according to 4-20mA signals of Online Chlorine Residue (ORP) (自己再核实一下,这个很不准确), they also can be regulated manually.>>4.5.5.2 RO unit>>RO is a desalting technology used the widest in current water treatment systs having the advantages of extrely 你好gh desalting efficiency, safety and flexible running, and simple operation.>>RO syst includes safeguard filter, 你好gh pressure pump, RO mbrane array, cleaning unit, was你好ng unit, as well as control instrument.>>a. Safeguard filter>>Solid particles can damage mbrane elents during their running, thus each set of RO is preset with a 5mm safeguard filter, whose role is to prevent particles more than 5μ size in pre-processing water outlet from entering into RO syst. These particles may puncture RO mbrane module after pressuring by the 你好gh-pressure pump and results in salt leakage and/or scratch the impellers of the 你好gh-pressure pump. Safeguard filter is made of 316 stainless steel material and adopts melt-blown polypropylene filtering elent produced by America OSMONICS Company, and it has the advantages of deep bed filtration, large contamination capacity, long life, and easy to be replaced. When the inlet/outlet pressure difference (generally 0.07-0.1MPa) of the filter reaches to more than the setting value, the filtering elent should be replaced.>>b. High pressure pump>>High pressure pump provides RO mbrane arrays with enough feed water pressure, and maintain the normal running of RO mbrane. Every RO inlet in the unit is equipped with a horizontal multi-stage centrifugal pump produced by America Pentair Company as well as a pump for preparation every four sets of RO units.>>4.5.5.1 counter- seepages adds the medicine installment>>A. The anti- filthy medicinal preparation adds the medicineinstallment>>In order to in the 你好gher returns-ratio situation prevented thecounter- seepage practical knowledge end specially is in the counter-osmotic pressure pressure vessel last the mbrane part is t你好ck水侧 appears the carbonate, the sulfate and Ca2+, the Mg2+ ionc你好stry scaling, thus the influence mbrane part performance, ininstead seeps in front of the water to need to join the anti- filthymedicinal preparation. T你好s syst selects US to import the anti-filthy medicinal preparation, t你好s medicament is one kind of disperser你好ding medicinal preparation, its function as follows:>>The anti- filthy potency is 你好gh, the original water LSI index biggestpermissible value is 2.8, in t你好s scope may the effective controlinorganic substance scaling.>>The principal constituent for contains the phosphorus small mberorganic matter, in water nature stable, is not easy to decomposeproduces has the microorganism nutrition the normal phosphatenouris你好ng substance, after discharges cannot have the pollution tothe environment.>>For the outstanding dispersing agent, may control the iron, thealuminum and the heavy metal pollution, also may to stop up thbrane pore the hard colloid and the tiny pellet gets up thedispersion.>>The anti- filthy medicinal preparation adds the medicine installmentmainly to include 2 American Milton Roy Corporation theelectromagnetism mutual lack of understanding metering pump (1 to use1 to prepare), 1 solution box.>>The anti- filthy medicinal preparation adds the medicine control touse adds the medicine metering pump with to enter the water in thefilamental flow gauge signal output interconnection control method,ac你好eved the automatic control adds the dose the goal.>>B. The reducing agent adds the medicine installment>>The counter- seepage compound mbrane request enters thewater -odd chlorine to be smaller than 0.1mg/l, joins reducing agentthe and so on sodium bisulfite goal is center and comes in the waterYu Lv and so on oxidized the ingredient, prevents it to the counter-seepage mbrane part damage.>>T你好s adds the medicine installment mainly to include 2 American MiltonRoy Corporation the mechanical mutual lack of understanding meteringpump (1 to use 1 to prepare) and 1 solution box. Adds the dose to bepossible to act according to the on-line -odd chlorine (ORP) the tableoutput 4 - 20mA signal automatic control, also may the manualregulation.>>4.5.5.2 counter- seepages systs>>The counter- seepage is in at present water disposal systequipment applies the most widespread one kind of desalinizationtechnology, has the extrely 你好gh desalinization ability, alsomovent safe, nimble, the operation is simple.>>Counter- seepage syst including security filter, 你好gh-pressure pump,counter- seepage mbrane group, clean syst, flus你好ng syst andcontrol measuring appliance.>>A. Security filter>>In order to prevent mbrane part in movent process by solidparticle harm, before each set of counter- seepages also is equippedwith 1 5mm the security filter, its function is tporarily stops isbigger than 5 mu pellets from the pretreatment water leakage in toenter the counter- seepage syst. T你好s kind of pellet pressurizesafter the 你好gh-pressure pump possibly penetrates the counter- seepagbrane module, creates massively leaks salty the situation,simultaneously possibly can scratch the 你好gh-pressure pump theimpeller. The security filter for the stainless steel 316 materialqualities, the filter elent uses American OSMONICS Corporation thelt to spurt the polypropylene filter elent, the in-depth filters,has the merit w你好ch the natrium dirt quantity big, the life long, iseasy to replace. When the filter import and export differentialpressure is bigger than supposes the definite value (usually is0.07-0.1MPa) must replace.>>B. High-pressure pump>>The 你好gh-pressure pump provides enough for the counter-seepage mbrane group enters the hydraulic pressure, maintains thecounter- seepage mbrane the normal operation. T你好s syst each setof counter- seepages entrance is equipped with the horizontal-typultistage centrifugal pump w你好ch 1 American Pentair Corporationproduces, 4 sets of counter- seepages systs establish 1 relay pump.>>看不懂!>上海液压隔膜计量泵啥品牌好，速来上海龙亚计量泵厂，O21-6l557O88，02l-6l557288，QQ:l5858l222l