What are the requirements for RO membrane inlet water conditions in pure water process?

1. Influent water quality requirements.

The pollution index (SDI) is used for the comprehensive index of influent water quality, and the SDI is generally required to be about 3 for hollow fiber modules, about 5 for roll modules, and about 15 for tubular modules.

2. The concentration requirements of scale substances that are easy to form.

Insoluble salts in raw water are concentrated in the reverse osmosis system and scale is formed when the solubility limit is exceeded. The insoluble salts that need to be controlled are: calcium sulfate, calcium carbonate and silicon, strontium sulfate, and calcium oxide.

3. Colloidal pollution control requirements.

For more information, see SID Parameter Requirements.

4. Biological pollution control requirements (chlorination can be used to ensure that the free chlorine content in the water is 5, and organic pollution control is required.)

TOC 3mg L, oil content

Summary of metal indicators of reverse osmosis (the parameters are the maximum values, taking the water source as groundwater as an example):

sdi：2；Turbidity:; toc：3mg/l；bod：8；cod：11；Average system flux:

1) Water temperature 25

2) Oxygen consumption 3mg L (KMno4 method).

3) Free chlorine

4) Iron 5) Manganese

6) Turbidity 1mg l

7) Pollution Index (SDI) 3

This indicator is only for general reverse osmosis membranes, and the inlet water requirements of specific membranes will be somewhat different, but it can be found in the membrane manual.

PP filtering is set in the front.

BAI device and activated DU carbon filter, etc. Most of the ZIPP filters are 5 microns, and DAO can intercept more than 5um of sediment and particles and other substances. Meltblown filter and wound filter for the first filtration.

The second course uses activated carbon, which has many holes, which can adsorb residual chlorine, odor, heavy metal ions, etc. in the water. The host is very susceptible to oxidation, and if the surface of the reverse osmosis membrane is oxidized, it will lead to a decrease in performance, causing irreversible damage. This is followed by sintering activated carbon, which further adsorbs oxides, which can be called security filters.

It is also the next process and the barrier.

Function: 1. Remove soluble substances.

2. Remove raw water colloids, bacteria, microorganisms, etc.

3. Remove viruses.

4. Remove organic chemicals.

5. Remove odor and improve taste.

6. Remove heavy metals such as lead.

Hello! The key filter element of the water purifier is RO reverse osmosis membrane and RO reverse osmosis technology.

It is the most common filtration technology used in the water treatment industry, it has a removal rate of more than 95% of the substances in the water genus, and the water that comes out is pure water, which can be directly drunk.

Hope it helps.

And whether you are asking about the water yield or the wastewater ratio.

If it is wastewater ratio.

The general water purifier is 1:2

Or 1:31 is good water, 2 or 3 is waste water (can be used), and some are energy-saving water purifiers.

The wastewater ratio can be adjusted to 1:1, and there are no wastewater at all, and the principle is actually to adjust the wastewater ratio to 1:1, and then directly connect the wastewater to the inlet water cycle to continue through RO reverse osmosis.

Take a 50-gallon pure water copy machine as an example:

RO membrane produces BAI water every 24 hours.

The water yield is 50 gallons, which is equivalent to 8 liters of water per hour.

If the wastewater ratio of 300 is used, 300ml of DAO wastewater is produced per minute, which is 18 liters of wastewater per hour, and the utilization rate is 8 (8+18)=30%.

If a wastewater ratio of 450 is used, 450ml of wastewater per minute is produced, which is 27 liters of wastewater per hour, and the utilization rate is 8 (8+27)=22%.

The general is a wastewater ratio of 300.

In general, the ratio is 1:3, which is also related to the temperature of the water, and when the water temperature drops below 10 degrees, the ratio is there.

1:5-7 ...

8%-85% Depending on the water quality and equipment configuration, it is theoretically 15-30% for a single membrane (conventional) and 8-10% for desalination membranes

1 The user should first confirm the material of the RO membrane element (CA TFC, etc.) used to consult and select a disinfectant and biocide to avoid damage to the RO membrane.

2. The cleaning liquid and disinfectant manufactured by the company are prepared by pure water, and the user should dilute it with RO water or pure water to prepare the working solution.

3. The user can determine the working volume of cleaning solution and disinfectant according to the number of membranes and the capacity of the system, and determine the amount of cleaning solution and disinfectant commodity.

4. According to the investigation and diagnosis of the RO system, determine the type of contamination of the RO membrane, and select the corresponding agent for cleaning or sterilization.

5 Cleaning solution The disinfection and sterilization solution must pass through the security filter before entering the RO membrane tube.

6. The best cleaning temperature is 25-35, if it is used under low temperature conditions, the cleaning time should be extended appropriately.

7. If there are multiple types of contamination in the RO system, it can be cleaned and sterilized in the order of organic, inorganic and microorganisms, and after each process is completed, it needs to be cleaned with RO permeable water before the next process. Cleaning solution and disinfection and sterilization solution are used separately and should not be mixed.

Scientific design, fully automatic operation, easy to operate, easy to maintain.

Our company provides RO membranes.

Promise the lowest price in the country.

The difference between RO membrane modules is:

1. The current membrane manufacturers are generally Dow, Hydeneng, GE, Toray, Korea, and Wharton.

2. The current industrial reverse osmosis membrane is generally divided into two kinds according to the different diameters, one is 4 inches in diameter, the other is 8 inches, and the length is 40 inches, that is, 4040, the membrane module is generally in the water, and the 8040 is generally in the water.

3. The difference between operating pressure: the general membrane module is divided into low-pressure and ultra-low-pressure membrane.

Almost, except that Dow is a dry film is more special.

Hyde Neng, Toray, and GE are all about the same, and they can basically be understood as the same.

1. The highest SDI (15 minutes) of water inlet <5

2. The highest turbidity of the inlet water is <

3. The maximum free chlorine concentration of inlet water is <

4. The maximum temperature of inlet water < 45

5. The highest FE value of the inlet water is <