| Certification: | ISO9001, CE |
|---|---|
| Salt Rejection Rate: | 98.0% |
| Application: | Drinking, Irrigation,Chemicals, Pharmaceuticals Et |
| Capacity: | 4t/H |
| Process: | Pre-Filters and Swro System |
| Product Name: | Seawater Desalination Plant for Drinking |
| Samples: |
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| Customization: |
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What is Seawater Reversed Osmosis?
Reverse osmosis (RO) technology is a high-tech water treatment technology, it relies on the reverse osmosis membrane under pressure to make the solvent and solute in the solution of the characteristics of the work. "Penetration" is a physical phenomenon, reverse osmosis is the containing salt, and various small impurities in water (raw water) greater than natural osmotic pressure, the water from the high concentration of reverse osmosis from one side to the low concentration, and the vast majority of minor impurities in raw water, organic matter, heavy metals, bacteria, viruses and other harmful substances, such as the sewage outlet discharge.
At present, RO process has occupied markets rapidly by the advantages of easy operation, easy maintenance and equipment modular, and begin to be the most widespread ways of instead of distillation step by step.
Seawater desalination Plant
All parts and pipes of sea water filtration part of the equipment are made of 316L stainless steel, duplex steel 2205 and UPVC material resistant to sea water corrosion.
|
Name
|
Capacity
(Tons/Hr)
|
Operation (Mpa)
|
Feed Inlet (MM)
|
Membrane Size ( Inch)
|
Recovery
|
Power
(KW)
|
|
XSTSWRO-250L
|
0.25
|
1.0-1.4
|
DN20
|
40*40
|
50%
|
1.1
|
|
XSTRO-500L
|
0.5
|
1.0-1.4
|
DN20
|
40*40
|
50%
|
1.5
|
|
XSTRO-750L
|
0.75
|
1.0-1.4
|
DN25
|
40*40
|
60%
|
2.2
|
|
XSTRO-1000L
|
1.0
|
1.0-1.4
|
DN25
|
40*40
|
60%
|
2.2
|
|
XSTRO-1500L
|
1.5
|
1.0-1.4
|
DN25
|
40*40
|
60%
|
3.0
|
|
XSTRO-2000L
|
2.0
|
1.0-1.4
|
DN25
|
40*40
|
60%
|
3.0
|
|
XSTRO-250LDP
|
0.25
|
1.0-1.4
|
DN20
|
40*40
|
50%
|
2.6
|
|
XSTRO-500LDP
|
0.5
|
1.0-1.4
|
DN25
|
40*40
|
50%
|
3.7
|
|
XSTRO-1000LDP
|
1.0
|
1.0-1.4
|
DN25
|
40*40
|
60%
|
5.2
|
|
XSTRO-2000LDP
|
2.0
|
1.0-1.4
|
DN25
|
40*40
|
60%
|
7.0
|
|
XSTRO-3
|
3.0
|
1.0-1.4
|
DN32
|
40*40
|
70%
|
4.0
|
|
XSTRO-6
|
6.0
|
1.0-1.4
|
DN40
|
80*40
|
70%
|
5.5
|
|
XSTRO-10
|
10.0
|
1.0-1.4
|
DN50
|
80*40
|
75%
|
11
|
|
XSTRO-15
|
15.0
|
1.0-1.4
|
DN50
|
80*40
|
75%
|
15
|
|
XSTRO-20
|
20.0
|
1.0-1.4
|
DN65
|
80*40
|
75%
|
18.5
|
| S/N. | Process | Application |
| 1 | Raw water tank | Store water, buffering pressure, overcome instability of supplying water by pipe, ensure to supply water stably and continuously for whole system. |
| 2 | Raw water pump / booster pump | Provide rated pressure for the pre-treatment filters, and we use one pump for use and the other one for standby, which can ensure the stable operation of the equipment. If one pump is faulty, the other pump will work to ensure that the water into the RO equipment will not be affected |
| 3 | Flocculant dosing system | The role of flocculant is to make the tiny colloids, suspended solids, and even organic matter in water forming large particles suspension (granules) by electro-neutralization, coagulation, bridging, and net trapping, so that these granules can be removed in the multi-media filter. |
| 4 | Multimedia Filter | FRP material as the filter housing, fill with quartz sand and anthracite inside, and mainly filter the particles, suspended matter, colloids and microorganisms of raw water. Usually the effluent quality of quartz sand filter can reach SDI<1 and turbidity<5; |
| 5 | Anti-scale dosing system | Scale inhibitor dosing can prevent the scaling of sulfate and prevent the damage of membranes such as calcium sulfate, especially the damage of crystalline crystals of BaSO4 and SrSO4. It also acts as a dispersing agent for iron colloids and fine particles, protect the membrane. |
| 6 | Security filter/PP filter | Prevent large particles, bacteria, viruses into RO membrane, accuracy is 5μm |
| 7 | Seawater High pressure Pump | Provide needed working pressure for RO system, ensure production capacity of pure water. (CNP pump CNP or customer-specified) |
| 8 | Seawater Reverse osmosis(RO) system | Can remove particles, colloids, organic impurities, heavy metal ions, bacteria, virus, heat source etc. harmful substances and 99% dissolved salts. |
| 9 | Chemical Cleaning system (Optional device) | It refers to the use of acid, alkali, organic chelating agents, dispersants and other chemical agents, to dissolve and remove dirt and scale attached to the metal surface. There are pickling, alkali washing, ammonia washing, sludge stripping, solvent cleaning and so on. |
| 10 | Electrical Control Cabinet | Automatic control, Relay /PLC/HIM as optional |
Application of Seawater Desalination Equipment
Seawater desalination has proven to be a reliable and economically sustainable water resource since the second half of the 20th Century. A number of well proven technologies already exist, with advantages and disadvantages making each of them more suitable in specific sites.
Moreover, quite recently, coupling the use of renewable energy to the production of fresh water from seawater results in novel technologies, able to minimize the environmental impact that desalination processes can create due to their intense energy consumptions.
Seawater coming into the plant goes through a rigorous pretreatment process then freshwater is separated from the seawater using reverse osmosis. The end product is high-quality drinking water that supplies up to 10 percent of the region's needs.
What types of water sources does it treat?
Reverse Osmosis is an ideal water treatment solution in most types of water.tap water, also known as municipal sources, undergroundwater, which includes brackish water, and saltwater. The biggest distinction between these three types is the Total Dissolved Solids (TDS) content of each type. As a rule of thumb, the American Health Association requires that drinking water is under 2,000 PPM TDS.Reverse osmosis is often used in a tap water environment to reduce hardness, or the debris deposited in water from traveling in metal pipes. Total dissolved solids is often a target of water purification in tap water systems.Underground reservoirs of water are often brackish, meaning they contain large volumes of salt, but not enough to be considered salt water. Groundwater is most often purified for the agriculture industry, the mining industry. Groundwater is also a prized target of the bottling industry, because the unique mineral combinations often have an appealing taste.
Salt water reverse osmosis (sometimes referred to as desalination) is the turning of saltwater into drinking water. Ocean water has up to 45,000 PPM TDS. The biggest uses of desalination come in providing water in areas that lack a regular supply of fresh water.
Is pretreatment necessary?
It is very important that feed water be preconditioned to protect the membranes from fouling causing premature failure.The membrane is constructed of a porous material that allows water to pass through, but rejects up to 99% of the dissolved solids at the surface. The dissolved salts are concentrated reject water (brine stream), where they are discharged to waste. Removing things prior is key to letting the RO system do what it was meant to do.As the RO System continues to operate, the dissolved and suspended solids in the feed water tend to accumulate along the membrane surface. If these solids are allowed to build up, they eventually restrict the passage of water through the membranes, resulting in a loss of throughput. (The throughput capacity of the membranes is commonly referred to as the flux rate, and is measured in gallons per square foot of membranes surface area per day.)
Is it necessary to get a water analysis?
A detailed chemical analysis (LSI, SDI, or CFI) of the RO feed water is an absolute necessity for identifying potential foulants. This should include a measurement of the hardness (calcium and magnesium), barium, strontium, alkalinity, pH, and chlorine. The data from the chemical analysis can be used by the engineers designing the system to determine the optimum
membrane array that will both minimize the tendency of scale and deposit formation and maximize the recovery and flux rate.
What determines the precise pretreatments for a particular RO?
In one word: analysis. Every source of water is different, and you never know what's in your water until you have it analyzed. The water analysis, LSI, SDI, or CFI values are used to determine the precise pretreatment requirements for a particular RO System. Since water supplies vary considerably from one location to another, each pretreatment requirement will be different.
Does the feed water need to be softened by the RO?
Ion exchange is a popular method for softening and reducing the potential for mineral scale formation on the membrane surface. Ion exchange softening uses sodium to replace scaleforming ions such as calcium, magnesium, barium, strontium, iron, and aluminum to prevent damage to the membrane elements. The sodium forms very soluble salts, which are readily rejected by the Reverse Osmosis System and do not readily form mineral scales on the membrane surface. A sodiumcycle softener is regenerated with sodium chloride brine. The spent regenerant, along with the softener rinse water, must be discharged to waste. It is because of this that ion exchange is recommended for applications that have high metal contents in the treated water.
Is acid injection necessary?
Just as acidic solutions aren't good for membranes, caustic solutions are equally damaging to membrane elements. Acid injection may be incorporated into the RO pretreatment system to control pH and minimize the scale-forming tendency of the feed water. Acid injection is indicated if the scale forming tendency of the brine stream is above +0.3 as measured by the LSI. Either sulfuric or hydrochloric acid can be used for this purpose.
What does an antiscalant do?
Antiscalants have been shown to be effective in extending the intervals between chemical cleanings of the RO membranes. These products are generally formulated to include inorganic phosphates, organophosphates, and dispersants. Some Antiscalant contain negatively charged polymers and dispersants that can react with cationic polymers that might be dosed up stream prior to the media filters. The Antiscalant must be compatible with these polymers; otherwise, the reaction product
will foul the membranes.
Do all systems require chemical cleaning?
Despite all efforts to protect the system from fouling and lose flux, eventually the membranes will require chemical cleaning. A welldesigned RO system will include provisions for a cleaning skid to facilitate the cleaning process. The skid should include a chemical tank, solution heater, recirculating pump, drains, hoses, and all other connection and fittings required for accomplishing a complete chemical cleaning of the RO modules.
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