مجموعة تكنولاب البهاء جروب

تحاليل وتنقية ومعالجة المياه
 
الرئيسيةالبوابةمكتبة الصورس .و .جبحـثالأعضاءالمجموعاتالتسجيلدخول
تنظيف وتطهير وغسيل واعادة تاهيل الخزانات


معمل تكنولاب البهاء جروب
 للتحاليل الكيميائية والطبية
والتشخيص بالنظائر المشعة
 للمخدرات والهرمونات والسموم
 وتحاليل المياه

مجموعة
تكنولاب البهاء جروب
لتصميم محطات الصرف الصناعى والصحى
لمعالجة مياه الصرف الصناعى والصحى
مجموعة تكنولاب البهاء جروب
المكتب الاستشارى العلمى
دراسات علمية كيميائية



معالجة الغلايات وانظمة البخار المكثف
معالجة ابراج التبريد المفتوحة
معالجة الشيللرات
مجموعة تكنولاب البهاء جروب
اسنشاريين
كيميائيين/طبيين/بكترولوجيين
عقيد دكتور
بهاء بدر الدين محمود
رئيس مجلس الادارة
استشاريون متخصصون فى مجال تحاليل وتنقية ومعالجة المياه
متخصصون فى تصنيع وتصميم كيماويات
معالجة الصرف الصناعى والصحى
حسب كل مشكلة كل على حدة
تصنيع وتحضير كيماويات معالجة المياه الصناعية
مؤتمرات/اجتماعات/محاضرات/فريق عمل متميز
صور من وحدات معالجة المياه


technolab el-bahaa group
TECHNOLAB EL-BAHAA GROUP
EGYPT
FOR
WATER
TREATMENT/PURIFICATION/ANALYSIS
CONSULTANTS
CHEMIST/PHYSICS/MICROBIOLIGIST
 
INDUSTRIAL WATER
WASTE WATER
DRINKING WATER
TANKS CLEANING
 
CHAIRMAN
COLONEL.DR
BAHAA BADR EL-DIN
0117156569
0129834104
0163793775
0174041455

 

 

 

تصميم وانشاء محطات صرف صناعى/waste water treatment plant design

technolab el-bahaa group
egypt
We are a consultants in water treatment with our chemicals as:-
Boiler water treatment chemicals
Condensated steam treatment chemicals
Oxygen scavenger treatment chemicals
Ph-adjustment treatment chemicals
Antiscale treatment chemicals
Anticorrosion treatment chemicals
Open cooling tower treatment chemicals
Chillers treatment chemicals
Waste water treatment chemicals
Drinking water purification chemicals
Swimming pool treatment chemicals
Fuel oil improver(mazote/solar/benzene)
technolab el-bahaa group
egypt
We are consultants in extraction ,analysis and trading the raw materials of mines as:-
Rock phosphate
32%-30%-28%-25%
Kaolin
Quartez-silica
Talcum
Feldspae(potash-sodumic)
Silica sand
Silica fume
Iron oxid ore
Manganese oxid
Cement(42.5%-32.5%)
Ferro manganese
Ferro manganese high carbon

 

water treatment unit design


 

وكلاء لشركات تركية وصينية لتوريد وتركيب وصيانة الغلايات وملحقاتها
solo agent for turkish and chinese companies for boiler production/manufacture/maintance

 

وكلاء لشركات تركية وصينية واوروبية لتصنيع وتركيب وصيانة ابراج التبريد المفتوحة

 

تصميم وتوريد وتركيب الشيللرات
design/production/maintance
chillers
ابراج التبريد المفتوحة
مجموعة تكنولاب البهاء جروب
المكتب الاستشارى العلمى
قطاع توريد خطوط انتاج المصانع
 
نحن طريقك لاختيار افضل خطوط الانتاج لمصنعكم
سابقة خبرتنا فى اختيار خطوط الانتاج لعملاؤنا
 
1)خطوط انتاج العصائر الطبيعية والمحفوظة والمربات
2)خطوط انتاج الزيوت الطبيعية والمحفوظة
3)خطوط انتاج اللبن الطبيعى والمحفوظ والمبستر والمجفف والبودرة
4)خطوط تعليب وتغليف الفاكهة والخضروات
5)خطوط انتاج المواسير البلاستيك والبى فى سى والبولى ايثيلين
6)خطوط انتاج التراى كالسيوم فوسفات والحبر الاسود
7)خطوط انتاج الاسفلت بانواعه
Coolمحطات معالجة الصرف الصناعى والصحى بالطرق البيولوجية والكيميائية
9)محطات معالجة وتنقية مياه الشرب
10)محطات ازالة ملوحة البحار لاستخدامها فى الشرب والرى
11)الغلايات وخطوط انتاج البخار الساخن المكثف
12)الشيللرات وابراج التبريد المفتوحة وخطوط انتاج البخار البارد المكثف
 
للاستعلام
مجموعة تكنولاب البهاء جروب
0117156569
0129834104
0163793775
 
القاهرة-شارع صلاح سالم-عمارات العبور-عمارة 17 ب
فلا تر رملية/كربونية/زلطيه/حديدية

وحدات سوفتنر لازالة عسر المياه

مواصفات مياه الشرب
Drinking water
acceptable
values

50

colour

acceptable

Taste

nil

Odour

6.5-9.2

ph

 

1 mg/dl

pb

5 mg/dl

as

50 mg/dl

cn

10 mg/dl

cd

0-100mg/dl

hg

8 mg/dl

f

45 mg/dl

N02

1 mg/dl

Fe

5 mg/dl

Mn

5.1 mg/dl

Cu

200 mg/dl

Ca

150 mg/dl

Mg

600 mg/dl

Cl

400 mg/dl

S04

200 mg/dl

Phenol

15 mg/dl

zn

 

 

الحدود المسموح به
ا لملوثات الصرف الصناعى
 بعد المعالجة
Acceptable
values
treated wate water
7-9.5

ph

25-37 c

Temp

40 mg/dl

Suspended solid

35 mg/dl

bod

3 mg/dl

Oil & grase

0.1 mg/dl

hg

0.02 mg/dl

cd

0.1 mg/dl

cn

0.5mg/dl

phenol

1.5 ds/m

conductivity

200 mg/dl

na

120 mg/dl

ca

56 mg/dl

mg

30 mg/dl

k

200 mg/dl

cl

150 mg/dl

S02

0.75 mg/dl

Fe

0.2 mg/dl

Zn

0.5 mg/dl

Cu

0.03 mg/dl

Ni

0.09 mg/dl

Cr

0.53 mg/dl

لb

0.15 mg/dl

pb

 





pipe flocculator+daf
plug flow flocculator
lamella settels

محطات تحلية مياه البحر بطريقة التقطير الومضى على مراحل
MSF+3.jpg (image)
محطات التقطير الومضى لتحلية مياه البحر2[MSF+3.jpg]
some of types of tanks we services
انواع الخزانات التى يتم تنظيفها
ASME Specification Tanks
Fuel Tanks
Storage Tanks
Custom Tanks
Plastic Tanks
Tank Cleaning Equipment
Double Wall Tanks
Septic Tanks
Water Storage Tanks
Fiberglass Reinforced Plastic Tanks
Stainless Steel Tanks
Custom / Septic
مراحل المعالجة الاولية والثانوية والمتقدمة للصرف الصناعى

صور مختلفة
من وحدات وخزانات معالجة الصرف الصناعى
 التى تم تصميمها وتركيبها من قبل المجموعة

صور
 من خزانات الترسيب الكيميائى والفيزيائى
 لوحدات معالجة الصرف الصناعى
المصممة من قبل المحموعة



technolab el-bahaa group


technolab el-bahaa group


technolab el-bahaa group

technolab el-bahaa group


technolab el-bahaa group


technolab el-bahaa group


technolab el-bahaa group


technolab el-bahaa group


technolab el-bahaa group


technolab el-bahaa group




مياه رادياتير اخضر اللون
بريستول تو ايه
انتاج شركة بريستول تو ايه - دمياط الجديدة
مجموعة تكنولاب البهاء جروب

اسطمبات عبوات منتجات شركة بريستول تو ايه-دمياط الجديدة

مياه رادياتير خضراء فوسفورية

من انتاج شركة بريستول تو ايه 

بترخيص من مجموعة تكنولاب البهاء جروب


زيت فرامل وباكم

DOT3



شاطر | 
 

 المبادلات الانيونية وطرق ازالة الاملاح من المياه

استعرض الموضوع السابق استعرض الموضوع التالي اذهب الى الأسفل 
كاتب الموضوعرسالة
Admin
Admin
avatar

عدد المساهمات : 3557
تاريخ التسجيل : 15/09/2009
العمر : 49
الموقع : مصر

مُساهمةموضوع: المبادلات الانيونية وطرق ازالة الاملاح من المياه   الخميس مايو 08, 2014 4:53 pm

Demineralization
Introduction
Demineralization is the removal of minerals and nitrate from the water. The three that we will be discussing in the lesson are ion exchange, reverse osmosis and electrodialysis. These methods are widely used for water and wastewater treatment. Ion exchange is primarily used for the removal of hardness ions like magnesium and calcium and for water demineralization. Reverse osmosis and electrodialysis, which are both membrane processes, remove dissolved solids from water using membranes.
 
 
How each Process Works
Ion Exchange
The ion exchange units are used to remove any charged substance from the water but are mainly used to remove hardness and nitrate from groundwater.
The water is pretreated to reduce the suspended solids and total dissolved solids load to ion-exchange unit.
The methods used for pretreatment include:
Cold lime without soda ash
Hot lime with or without soda ash
Coagulation and filtration
Filtration
Evaporation or distillation
Reverse osmosis
Ultrafiltration
 
 
In this type of process, 90% of barium, arsenic, cadmium, chromium, silver, radium, nitrites, selenium and nitrates can be effectively removed from water. Ion exchange is one of the choices that is better for small systems that need to remove radionuclides.
 
 
Advantages of Ion Exchange
Ion exchange can be used with fluctuating flow rates.
Makes effluent contamination impossible
Resins are available in large varieties from suppliers and each resin is effective in removing specific contaminants.
 
 
Limitations of Ion Exchange
Pretreatment is required for most surface waters
Waste is highly concentrated and requires careful disposal
Unacceptable high levels of contamination in effluent
Units are sensitive to the other ions present.
 
 
Ion Exchange Process
Inorganic removal is accomplished through the adsorption of contaminant ions onto a resin exchange medium. One ion is substituted for another on the charged surface of the medium that is usually a plastic resin. This type of surface is designed as either cationic or anionic-negatively charged. The medium is saturated with exchangeable ions before the treatment operations.
The contaminant ions during ion exchange, replace the regenerant ions because they are preferred by the exchange medium. When no ions are left to take the place of the contaminant ions, the medium is regenerated with a suitable solution that saturates the medium with the appropriate ions. Since there is a required down time, the regeneration cycles are done only once per day.
For resin exchange, capacity is expressed in terms of weight per unit volume of the resin used. Calculation of the breakthrough time for an ion exchange unit requires knowing the resin exchange capacity, influent contaminant concentration and the desired effluent quality.
 
 
Ion Exchange Equipment
The ion exchange unit contains prefiltration, disinfection, ion exchange, storage and distribution elements.
 
 
Chemicals Used
To regenerate the exchange medium in ion exchangers, the chemical, sodium chloride is often used because of its low cost. When using this chemical one must remember that high sodium residual will result in the finished water which may cause it to be unacceptable for individuals with a salt restricted diet. To avoid this problem, other regenerant materials can be used such as potassium chloride.
 
 
 
Reverse Osmosis
In a reverse osmosis system, the water is put under pressure and forced through a membrane that filters out the minerals and nitrate. These systems are compact and easy to operate and require minimal labor, which make them suitable for small systems and for systems where there is a high degree of seasonal fluctuation in water demand.
Reverse osmosis effectively removes nearly all the inorganic contaminants from water. This process removes over 70% of the following:
•  Arsenic-3
•  Arsenic-4
•  Barium
•  Cadmium
•  Chromium-3
•  Chromium-6
•  Fluoride
•  Lead
•  Mercury
•  Nitrite
•  Selenium-4 and selenium-6
•  Silver
 
When the units are operated properly, ninety-six percent removal rates will be attained. Reverse osmosis also affectively removes natural organic substances, pesticides, radium and microbiological contaminants. To work effectively, reverse osmosis should be used in series. Near 0 effluent contaminant concentrations can be achieved by water passing through multiple units.
 
Advantages of Reverse Osmosis
Nearly all contaminant ions and most dissolved non-ions are removed
Suitable for small systems with a high degree of seasonal fluctuation in water demand
Insensitive to flow and TDA levels
Operates immediately without any minimum break-in period
Possible low effluent concentrations
Removes bacteria and particles
Simplicity and automation operation allows for less operator attention which makes them suitable for small system applications.
 
Limitation of RO
High operating costs and capital
Potential problem with managing the wastewater brine solution
Pretreatment at high levels
Fouling of membranes
 
RO Process
In this process, contaminants are removed from water by using a semi-permeable membrane that permits only water, not the dissolved ions, to pass through its pores. The contaminated water is subjected to high pressure that forces the pure water through the membrane, leaving the contaminants behind in a brine solution. The membranes come in a variety of pore sizes and characteristics.
 
RO Equipment
RO units include the following:
Raw water pumps
Pretreatment
Membranes
Disinfection
Storage
Distribution elements
 
Units are able to process any desired quantity or quality of water by configuring units sequentially to reprocess waste brine from earlier stages of the process. Principle design for reverse osmosis units are:
Membrane type and pore size
Operating pressure
Required pretreatment
Product conversion rate
 
 
Electrodialysis
Electrodialysis is effective in removing fluoride and nitrate from water. This process also uses membranes but direct electrical currents are used to attract ions to one side of the treatment chamber. This system includes a source of pressurized water, direct current power supply and a pair of selective membranes.
 
 
Advantages of Electrodialysis
All the contaminant ions and many of the dissolved non-ions are removed
Insensitive to flow and TDS levels
Possible low effluent concentrations
 
Limitations of Electrodialysis
Operating costs and capital are high
Level of pretreatment required is high
Twenty to ninety percent of feed flow is rejected stream
Replacement of electrodes
 
Electrodialysis Process
In this process, the membranes adjacent to the influent steam are charged either positively or negatively and this charge attracts counter-ions toward the membrane. These membranes are designed to allow the positive or the negative charged ions to pass through the membrane, where the ions move from the product water stream through a membrane to the two reject water streams.
 
Electrodialysis Equipment
The electrodialysis system has three essential elements:
Source of pressurized water
Direct current power supply
A pair of selective membranes
 
The average ion removal rate varies from one-fourth to two-thirds percent per stage. Using multiple stage units can increase the efficiency of removal. The membrane pairs are stacked in the treatment vessel.
 
Chemicals Used
The amount of water treated may be limited by the fouling of the membranes. Fouling is caused if the membranes pores become clogged by salt precipitation or by the obstruction of suspended particulates. The particulates that are suspended in the water can be removed in pretreatment but the salts that exceed the solubility product at the membrane surface has to be controlled chemically by pH reduction or chelation of the metal ions by using phosphate. Reversal of the charge on the membranes, electrodialysis reversal (EDR) helps flush the attached ions from the membrane surface which helps extend the time between cleanings.
 
 
الرجوع الى أعلى الصفحة اذهب الى الأسفل
معاينة صفحة البيانات الشخصي للعضو http://technolabelbahaagp.googoolz.com
Admin
Admin
avatar

عدد المساهمات : 3557
تاريخ التسجيل : 15/09/2009
العمر : 49
الموقع : مصر

مُساهمةموضوع: نظام ازالة املاح المياه   الخميس مايو 08, 2014 5:06 pm

Deionized water also known as demineralized water is water that has had its mineral ions removed. Mineral ions such as cations of sodium, calcium, iron, copper, etc and anions such as chloride, sulphate, nitrate, etc are common ions present in water. Deionization is a physical process which uses specially-manufactured ion exchange resins which provides ion exchange site for the replacement of the mineral salts in water with water forming H+ and OH- ions. Because the majority of water impurities are dissolved salts, deionization produces a high purity water that is generally similar to distilled water, and this process is quick and without scale buildup. 




Electrodeionization (EDI) is a water treatment process that removes ionizable species from liquids using electrically active media and an electrical potential to effect ion transport. It differs from other water purification technologies such as conventional ion exchange in that it does not require the use of chemicals such as acid and caustic for reactivation. EDI is commonly used as a polishing process to further remove trace ionic salts of the Reverse Osmosis (RO) permeate to high purity water of multi-megohm-cm quality. 




The continuous electrodeionization (EDI) process, is distinguished from other electrochemical collection/discharge processes such as electrochemical ion exchange (EIX) or capacitive deionization (CapDI), in that EDI performance is determined by the ionic transport properties of the active media, not the ionic capacity of the media. EDI devices typically contain semi-permeable ion-exchange membranes and permanently charged media such as ion-exchange resin. The EDI process is essentially a hybrid of two well-known separation processes - ion exchange deionization and electrodialysis, and is sometimes referred to as filled-cell electrodialysis. 





How it works
The electrically active media in EDI devices may function to alternately collect and discharge ionizable species, or to facilitate the transport of ions continuously by ionic or electronic substitution mechanisms. EDI devices may comprise media of permanent or temporary charge, and may be operated batchwise, intermittently, or continuously. 



There are two distinct operating regimes for EDI devices: enhanced transfer and electroregeneration (Ganzi, 1988). In the enhanced transfer regime, the resins within the device remain in the salt forms. In low conductivity solutions the ion exchange resin is orders of magnitude more conductive than the solution, and act as a medium for transport of ions across the compartments to the surface of the ion exchange membranes. This mode of ion removal is only applicable in devices that allow simultaneous removal of both anions and cations, in order to maintain electroneutrality. 




The second operating regime for EDI devices is known as the electroregeneration regime. This regime is characterised by the continuous regeneration of resins by electrically produced hydrogen and hydroxide ions. The dissociation of water preferentially occurs at bipolar interfaces in the ion-depleting compartment where localized conditions of low solute concentrations are most likely to occur (Simons). The two primary types of interfaces in EDI devices are resin/resin and resin/membrane. The optimum location for water splitting depends on the configuration of the resin filler. For mixed-bed devices water splitting at both types of interface can result in effective resin regeneration, while in layered bed devices water is dissociated primarily at the resin/membrane interface. 




"Regenerating" the resins to their H+ and OH- forms allows EDI devices to remove weakly ionized compounds such as carbonic and silicic acids, and to remove weakly ionized organic compounds. This mode of ion removal occurs in all EDI devices that produce ultrapure water. 




Under Direct Current (DC) electrical potential, Water (H2O) behaves as follows:

H2O -> H+ + OH- 





Technology Overview
A typical EDI device contains alternating semipermeable anion and cation ion-exchange membranes. The spaces between the membranes are configured to create liquid flow compartments with inlets and outlets. A transverse DC electrical field is applied by an external power source using electrodes at the ends of the membranes and compartments. 



When the compartments are subjected to an electric field, ions in the liquid are attracted to their respective counterelectrodes. The result is that the compartments bounded by the anion membrane facing the anode and the cation membrane facing the cathode become depleted of ions and are thus called purifying (or sometimes, diluting) compartments. The compartments bounded by the anion membrane facing the cathode and cation membrane facing the anode will then “trap” ions that have transferred in from the purifying compartments. Since the concentration of ions in these compartments increases relative to the feed, they are called concentrating compartments, and the water flowing through them is referred to as the concentrate stream (or sometimes, the reject stream).




In an EDI device, the space within the ion depleting compartments (and in some cases in the ion concentrating compartments) is filled with electrically active media such as ion exchange resin. The ion-exchange resin enhances the transport of ions and can also participate as a substrate for electrochemical reactions, such as splitting of water into hydrogen (H+) and hydroxyl (OH-) ions. Different media configurations are possible, such as intimately mixed anion and cation exchange resins (mixed bed or MB) or separate sections of ion-exchange resin, each section substantially comprised of resins of the same polarity: e.g., either anion or cation resin. 





Comparing New and Old Technology
When compared with conventional resin-based, chemically regenerated deionization equipment, EDI systems offer a variety of benefits. Most obvious is the elimination of the regeneration process and its associated hazardous regeneration chemicals - acid and caustic. Since EDI operates through a combination of ion-transfer across the resins and membranes, as well as electrochemical regeneration of a portion of the bed, the resins and membranes are always functional as long as the DC voltage is applied. The resin in a conventional deionizer only purifies water when in its active (regenerated) form. As a result, the EDI system product water quality stays constant over time, whereas in regenerable deionization, product water quality degrades as the resins approach exhaustion. For those processes requiring DI water on a continuous basis, conventional systems must be duplexed so that one system can provide water while the other is regenerated. Duplexing adds cost, complexity, and size to conventional DI systems. Because EDI is continuous, and not a batch process, duplexing is not necessary. As a result of this, as well as the avoidance of regenerant chemical storage and transfer equipment, EDI system footprints are often one half of the size of their conventional counterparts. 



There are significant tangible cost benefits associated with the elimination of regeneration. The costs of regeneration labor and chemicals are replaced with a small amount of electrical consumption. A typical EDI system will use approximately 1 kW-hr of electricity to deionize 1000 gallons from a feed conductivity of 50 microsiemen /cm to 0.1 µS/cm product conductivity. Since the EDI concentrate (or reject) stream contains only the feed water contaminants at 5-20 times higher concentration, it can usually be discharged without treatment, or used for another process. Thus facility costs can also be reduced since waste neutralisation equipment and ventilation for hazardous fumes are not necessary.




There are also less tangible cost reductions, which are harder to quantify, but usually favor the use of EDI systems. By eliminating hazardous chemicals wherever possible, workplace health and safety conditions can be improved. With today's increasing regulatory influence on the workplace, the storage, use, neutralisation, and disposal of hazardous chemicals result in hidden costs associated with monitoring and paperwork to conform to EPA and OSHA requirements as well as the "Right To Know" laws. In addition, the fumes, particularly from acid, often cause corrosive structural damage to facilities and equipment. 




For the most part the elimination of regenerant chemicals is considered advantageous, but the chemicals do offer at least one benefit. In conventional demineralisers, acid and caustic is typically applied to the ion exchange resins at concentrations of 2-8% by weight. At these concentrations the chemicals not only regenerate the resins but clean them as well. The electrochemical regeneration that occurs in a EDI device does not provide the same level of resin cleaning. Therefore proper pretreatment is even more important with a EDI device, in order to prevent fouling or scaling. This is one of the reasons that RO pretreatment is normally required upstream of a EDI system. In general the feed water requirements for EDI systems are stricter than for a chemically regenerated demineraliser.
الرجوع الى أعلى الصفحة اذهب الى الأسفل
معاينة صفحة البيانات الشخصي للعضو http://technolabelbahaagp.googoolz.com
Admin
Admin
avatar

عدد المساهمات : 3557
تاريخ التسجيل : 15/09/2009
العمر : 49
الموقع : مصر

مُساهمةموضوع: وحدات ازالة الاملاح من المياه   الخميس مايو 08, 2014 5:36 pm

 
Demineralization ( DM ) Water Treatment Plants


Demineralization is the process of removing mineral salts from water by using the ion exchange process.


Demineralised water is water completely free (or almost) of dissolved minerals as a result of one of the following processes :


• Distillation 

• Deionization 

• Membrane filtration (reverse osmosis or nanofiltration) 

• Electrodyalisis

• Or other technologies.



resins which provides ion exchange site for the replacement of the 
salts in 
mineral water with water forming H+ and OH- ions.


Because the majority of water impurities are dissolved salts, deionization produces a high purity water that is generally similar to distilled water, and this process is quick and without scale buildup.



De-mineralization technology is the proven process for treatment of water.


 A DM Water System produces mineral free water by operating on the principles of ion exchange, Degasification, and polishing. Demineralized Water System finds wide application in the field of steam, power, process, and cooling.


Principle


Raw water is passed via two small polystyrene bead filled (ion exchange resins) beds. While the cations get exchanged with hydrogen ions in first bed, the anions are exchanged with hydroxyl ions, in the second one.


Process :


In the context of water purification, ion-exchange is a rapid and reversible process in which impurity ions present in the water are replaced by ions released by an ion-exchange resin.


The impurity ions are taken up by the resin, which must be periodically regenerated to restore it to the original ionic form.


(An ion is an atom or group of atoms with an electric charge. Positively-charged ions are called cations and are usually metals; negatively-charged ions are called anions and are usually non-metals).


The following ions are widely found in raw waters :


Cations
Anions
Calcium (Ca2+)
Chloride ( Cl-)
Magnesium (Mg2+)
Bicarbonate (HCO3-)
Sodium (Na+)
Nitrate (NO3-)
Potassium (K+)
Carbonate (CO32-)
 
Ion Exchange Resins :


There are two basic types of resin - cation-exchange and anion-exchange resins.


Cation exchange resins will release Hydrogen (H+) ions or other positively charged ions in exchange for impurity cations present in the water.


Anion exchange resins will release hydroxyl (OH-) ions or other negatively charged ions in exchange for impurity anions present in the water.


The application of ion-exchange to water treatment and purification. There are three ways in which ion-exchange technology can be used in water treatment and purification :


first, cation-exchange resins alone can be employed to soften water by base exchange; secondly, anion-exchange resins alone can be used for organic scavenging or nitrate removal; and thirdly, combinations of cation-exchange and anion-exchange resins can be used to remove virtually all the ionic impurities present in the feedwater, a process known as deionization.


Water deionizers purification process results in water of exceptionally high quality


Deionization :


For many laboratory and industrial applications, high-purity water which is essentially free from ionic contaminants is required.


Water of this quality can be produced by deionization.


The two most common types of deionization are :


• Two-bed deionization

• Mixed-bed deionization


Two-bed deionization :


The two-bed deionizer consists of two vessels - one containing a cation-exchange resin in the hydrogen (H+) form and the other containing an anion resin in the hydroxyl (OH-) form.


Water flows through the cation column, whereupon all the cations are exchanged for hydrogen ions.


To keep the water electrically balanced, for every monovalent cation, e.g. Na+, one hydrogen ion is exchanged and for every divalent cation, e.g. Ca2+, or Mg2+, two hydrogen ions are exchanged.


The same principle applies when considering anion-exchange. The decationised water then flows through the anion column.


This time, all the negatively charged ions are exchanged for hydroxide ions which then combine with the hydrogen ions to form water (H2O).


Mixed-bed deionization :


In mixed-bed deionizers the cation-exchange and anion-exchange resins are intimately mixed and contained in a single pressure vessel.


The thorough mixture of cation-exchangers and anion-exchangers in a single column makes a mixed-bed deionizer equivalent to a lengthy series of two-bed plants.


As a result, the water quality obtained from a mixed-bed deionizer is appreciably higher than that produced by a two-bed plant. 



Although more efficient in purifying the incoming feedwater, mixed-bed plants are more sensitive to impurities in the water supply and involve a more complicated regeneration process.


Mixed-bed deionizers are normally used to ‘polish' the water to higher levels of purity after it has been initially treated by either a two-bed deionizer or a reverse osmosis unit.


Electrodeionization EDI :


Electrodeionization Systems remove ions from aqueous streams, typically in conjunction with reverse osmosis (RO) and other purification devices.


Our high-quality deionization modules continually produce ultrapure water up to 18.2MW/cm. EDI may be run continuously or intermittently


Advantages :


• Variety of cost effective standard models. 
• Improved aesthetics and rugged design.
• User friendly, low maintenance and easy to install.
• Simpler distribution and collection systems.
• Quick availability.
• Pre dispatch assembly check.
• The multiport valves are top mounted as well as side mounted with the necessary high pressure rating PVC piping. 
• Single valve operation as compared to the six valves in conventional filters 
• Each operating step is clearly marked on the valve, thereby eliminating chances of error in the operating sequence.
• Single valve assembly, with its simplified frontal Piping, simpler distribution collecting systems is Very easy to install.
• Rust free 
• Less power consumption 
• Durable 
• Economical 

• High shelf life


Major Applications :


• Boilers feed water, Textiles, Pharmaceuticals, Chemicals, Breweries, Swimming pools, Potable Water, Hospitals, Automobile, and
   Battery, Fertilizers. 
• Ion Exchange Plants 
   - Softener
   - Industrial DM Plant
   - Two Stage & Multi Stage DM Plants
   - Mix Bed Demineraliser
   - De-Gasifiers
   - Cation Polisher
   - Manual/Automatic Plants
   - Pharmaceutical Industry
   - Power Plant
   - Oil & Gas sector
   - Chemical Industries

   - Textile Industries
الرجوع الى أعلى الصفحة اذهب الى الأسفل
معاينة صفحة البيانات الشخصي للعضو http://technolabelbahaagp.googoolz.com
 
المبادلات الانيونية وطرق ازالة الاملاح من المياه
استعرض الموضوع السابق استعرض الموضوع التالي الرجوع الى أعلى الصفحة 
صفحة 1 من اصل 1

صلاحيات هذا المنتدى:لاتستطيع الرد على المواضيع في هذا المنتدى
مجموعة تكنولاب البهاء جروب :: قسم معالجة وتنقية وتحاليل المياه :: تصميم وتركيب وتوريد وحدات معالجة المياه-
انتقل الى: