Active Member
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[China]
Address: No. 2 Xiuyan Road, Hangzhou City, Zhejiang Province
Contact name:Robert Wang
Hangzhou Haina Environmental Protection Tech Co., Ltd. |
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4040 FR Low Pressure Water Purifier of Reverse Osmosis RO Membrane Element
Hydrochloric acid (HCl) and sulfuric acid (H2SO4) can be added to the influent water to lower the pH. Sulfuric acid is cheap, does not fumes and corrodes surrounding metal components, and the membrane has a higher removal rate of sulfate ions than chloride ions, so sulfuric acid is more commonly used than hydrochloric acid. Industrial grade sulfuric acid without other additives is suitable for reverse osmosis. Commercial sulfuric acid has two concentration specifications: 20% and 93%. 93% sulfuric acid is also known as 66 Baume degree sulfuric acid. Care must be taken when diluting 93% sulfuric acid, heating to 66% can raise the temperature of the solution to 138°C. Be sure to add the acid slowly to the water with stirring to avoid localized boiling of the aqueous solution. Hydrochloric acid is mainly used when calcium sulfate or strontium sulfate scaling may occur. The use of sulfuric acid increases the sulfate ion concentration in the reverse osmosis influent, which directly results in an increased tendency for calcium sulfate scaling. Industrial grade hydrochloric acid (without additives) is very convenient to buy, and the general content of commercial hydrochloric acid is 30-37%.
The primary purpose of lowering the pH is to reduce the propensity of calcium carbonate scaling in the RO concentrate, ie to lower the Langerial Index (LSI). LSI is the saturation of calcium carbonate in low salinity brackish water, indicating the potential for calcium carbonate scaling or corrosion. In reverse osmosis water chemistry, LSI is an important indicator to determine whether calcium carbonate scaling will occur. When the LSI is negative, the water will corrode metal pipes, but will not form calcium carbonate scale. If the LSI is positive, the water is not corrosive, but calcium carbonate scaling occurs.
Performance
| Model Number | Description | 4040-FR |
| Performance & Test Condition | The Desalination Rate % | 99.5% |
| Water Rate GDP | 2400 | |
| The Test pressure | 225psi | |
| Test solution Temperature | 25± 1ºC | |
| Test Solution Concentration NaCl | 2000ppm | |
| Test solution PH value | 6.5-7.5 | |
| Recovery Of Single-Branch Membrane Element | 15% | |
| Feed water SDI | ≤5 |
Note:1. The Max. continous operation temperature is 35ºC when PH
rate over 10.
2.In certain conditions,if would cause membrane breakage if the
free chlorine or the other oxidant in feedwater.The production
quality guarantee range is notincluded membrane breakage by
oxiadation.
Membrane Dimentions
Our Service:
Pre-sale service
1.We have full stock and can deliver within short time.
2.OEM and ODM order are accepted, Any kind of logo printing or
design is available.
3.Good Quality + Factory Price + Quick Response + Reliable Service,
is what we are trying to offer.
4.All of our products are produced by our professional workers and
we have our high-work-effect foreign trade team, you can totally
believe our service.
After you choose
1. We will count cheapest shipping cost and make invoice to you at
once.
2. Check quality again, then send out to you within 7 working days
after your payment
3. Email you the tracking No., and help to chase the parcels until
it arrive you.
After-sale service
1.We are very glad that customers give us some suggestion for price
and products.
2.If you have any question,please contact us freely by E-mail or
Telephone.
FAQ:
Q: How to buy your products?
A: we need some essential information include sewage sources,
sewage quality ( COD, BOD,SS),Required Filtered water quality,
designed technological process, site engineering conditions
(contact us for details),then we will design the uitable solutions
for you and prepare to give you best price.
Q: How to pay?
A: TT and L/C are acceptable and TT will be more appreciated. 30%
deposit before producing, 70% balanced against the copy of B/L.
Q: What is the delivery time?
A: Usually within 15days. Also depends on order quantities.
Q: Can the package be customized by our own logo ?
A: Yes, the package can be customized your logo, but the MOQ will
be higher for which we can discuss as per the specific orders.
Q: How to install after the products arriving destination?
A: We will provide detailed illustrations to you. And we can also
provide guide to your workers how to use it and how to maintain
it.
Q:What's the certification do you have?
A: We have NSF, ISO9001, OHSAS18001, ISO14001 Certifications.
