How about the Lanjing seven stage ultrafiltration water purifier?

I haven't heard of this brand, so it is recommended to choose a larger brand.

You can learn about it on their official website, and take a look at the inspection report of this product and the health license approval document of this product

It is recommended to consult the official website or local ** business to avoid being deceived.

Let's put it this way, ultrafiltration water purifiers can remove water-insoluble pollutants and ensure the clarity of water, but they can do almost nothing about water-soluble pollution, especially chemical pollution. In the case of poor water quality in China, it is not recommended to install ultrafiltration water purifiers.

Ultrafiltration water purifiers generally only filter large particles, and it is best to buy RO reverse osmosis.

1: Tap water: nano membrane surface ultrafiltration membrane + ultrafiltration companion (activated carbon + ultrafiltration membrane).

Ultrafiltration companion description: activated carbon as the main color, taste, smell, chloride, heavy metal in water treatment, and activated carbon does not have the function of sterilization and turbidity, but will drop carbon slag and breed bacteria, the activated carbon filtered water through the nano membrane surface ultrafiltration membrane can completely solve the negative effect of activated carbon.

Note: Activated carbon is a consumable product, which must be replaced after 6-12 months of use.

2: Description of groundwater and lake water:

Groundwater and lake water are the main domestic water, but the two water sources need to be advanced according to the test report data, according to different water quality equipped with different processes, the main filter materials for filtering groundwater are: RO membrane, PVC alloy ultrafiltration membrane, manganese sand, KDF, activated carbon, chloroform, soft water resin, disc filter, mineral fossils, etc.

Ultrafiltration water purifiers are aimed at water quality.

Note: Different materials are used according to different water sources.

PAN film: It has excellent chemical stability, acid resistance, alkali resistance and hydrolysis resistance, and can be widely used in various fields;

The membrane filament has good strength and flexibility;

After hydrophilic modification, the water yield is large, and it has strong pollution resistance.

The membrane filament formula material is less, the process is easy to control, and there will be no phenomenon of PVC raw material formulation material resulting in the odor problem of the membrane itself.

PVDF Membrane:

Ultraviolet resistance, excellent resistance to pollution and chemical attack;

The heat-resistant temperature can reach 140, and ultra-high temperature steam and ethylene oxide sterilization can be used;

It can be used in a wide pH range (1-13) and can be used under strong acid and alkali conditions and various organic solvents.

Nano membrane surface ultrafiltration membrane:

It has the advantages of general ultrafiltration membrane;

The mirror surface of the membrane is smoother than that of the general ultrafiltration membrane, which can effectively inhibit the growth of bacteria and prolong the service life of the ultrafiltration membrane.

Factors affecting the water yield of ultrafiltration membranes.

1. The influence of temperature on water production: the activity of water molecules increases and the viscosity decreases when the temperature increases, so the water yield increases. Conversely, the water yield decreases, so even the difference in water yield between winter and summer is significant, even for the same ultrafiltration system.

2. The influence of operating pressure on water production: the water production of the ultrafiltration membrane is proportional to the pressure in the low pressure section, that is, the water yield increases with the increase of pressure, but when the pressure value is exceeded, even if the pressure rises again, the increase of water production is very small, mainly due to the increase of water permeability resistance caused by the ultrafiltration membrane being compacted under high pressure.

3. The influence of inlet turbidity on water production: the larger the turbidity of the inlet water, the less water production of the ultrafiltration membrane, and the large turbidity of the inlet water is more likely to cause the blockage of the ultrafiltration membrane.

4. The influence of flow rate on water production: the influence of flow rate change on water production is not as obvious as temperature and pressure, and the flow rate is too slow to cause the ultrafiltration membrane to be blocked, and too fast to affect the water production.

Reverse osmosis is better.

1. Reverse osmosis and ultrafiltration, the core components are membrane elements. There are three main differences:

1) The pore size of the reverse osmosis membrane is only 1 100 of the ultrafiltration membrane, so the reverse osmosis water purifier can remove heavy metals, pesticides, chloroform and other chemical pollutants in the water, and the ultrafiltration water purifier is powerless to do so; The ultrafiltration water purifier can remove particulate pollutants and bacteria, reverse osmosis can remove all-round.

2) The effluent water quality and the testing standards of the health department are different, for example, the effluent bacteria index, the ultrafiltration water purifier is "general water quality processor", and the total number of colonies is 100 ml; The reverse osmosis water purifier is 20 ml, which is much stricter, and of course, the water quality of the reverse osmosis water purifier is much better than that of the ultrafiltration water purifier.

3) The reverse osmosis water purifier is a qualitative water supply, pure water for drinking, and concentrated water for washing; The ultrafiltration water purifier is generally used as washing water; It can also be used as drinking water when the tap water is of good quality.

The location of the installation is different, the role is different, and the relationship between the pre-amp and the sub-amp is different.

Reverse osmosis water purifier and ultrafiltration water purifier have their own advantages and disadvantages, it depends on personal preference, ultrafiltration water purifier is easy to install and does not rely on electricity to filter water pressure, reverse osmosis water purifier to use electricity, installation is slightly troublesome, ** is also different, and it is cheap to maintain and replace the filter element ultrafiltration water purifier in the future.

Ultrafiltration membranes have a poor effect on the removal of organic matter, and cannot effectively remove total organic carbon and disinfection by-products and their parents.

Ultrafiltration can not remove organic matter and heavy metals, ammonia nitrogen and other special pollutants such as excess iron, manganese, fluorine, etc., if microfiltration or ultrafiltration as the terminal treatment technology for the production of high-quality drinking water, it is necessary to arrange a coordinated and unified pretreatment system in front, such as turbidity, iron and manganese, organic matter, fluorine and other micro-flocculation filtration, manganese sand filter, activated carbon filter, etc.

Ultrafiltration water purifier is a simple, convenient and practical small household terminal water treatment equipment. By directly connecting to the tap water, the multi-stage filter element is used to physically drive out impurities in the water, and the effluent is clean, safe, environmentally friendly and healthy, which is currently the most practical terminal water treatment method in the world. Help you effectively solve many problems of household water.

The ultrafiltration water purifier can completely and effectively remove impurities, rust, some bacteria, viruses, colloids, etc. in the tap water by using its membrane pores, and then make up for the headache of bacterial secondary pollution of some simple and rough single-stage water purifiers and activated carbon water purifiers, and bring you a new way of drinking water. Owning an ultrafiltration water purifier is equivalent to owning a small household mineral water plant. Everyday life can also be a drink of happiness.

Ultrafiltration can remove nano (10-9m) or larger particle impurities, which can directly produce high-quality drinking water, and can also be used as a pretreatment facility for reverse osmosis or nanofiltration. However, the ultrafiltration membrane has a very poor removal effect on organic matter, and cannot effectively remove total organic carbon and disinfection by-products and their parents.

In view of the fact that ultrafiltration cannot remove organic matter and heavy metals, ammonia nitrogen and other special pollutants such as excessive iron, manganese, fluorine, etc., if microfiltration or ultrafiltration is used as the terminal treatment technology for high-quality drinking water production, it is necessary to arrange a coordinated and unified pretreatment system in front, such as micro-flocculation filtration, manganese removal, organic matter, fluoride removal, manganese sand filter, activated carbon filter, etc.

An ultrafiltration water purifier is a device that uses ultrafiltration technology to purify water. The difference from other water purification equipment is that it uses ultrafiltration membranes. It is a microporous filter membrane with consistent pore size specifications and a rated pore size range of microns.

It is mainly divided into two kinds of kitchen type and counter type, kitchen type 3m, love Huipu, or good, large company publicity is reliable (it is recommended to log on to the official website to view, the introduction of a treasure has no reference value), on the table, divided into countertop and faucet, countertop model, Japan Toray and Mitsubishi do a good job, the filtration accuracy is reached, the flow rate can range from 1500-2000 liters, it can be used for 1 year, the faucet model, Philips is the best, the filtration accuracy can reach microns, The filter element can be used for 3-6 months, and the filter element can be changed 3 times a year, and the cost is also acceptable.

No, the ultrafiltration water purifier can remove bacteria, impurities visible to the naked eye, colloids, and particulate impurities, and the water quality is clear after filtration by the ultrafiltration water purifier, but it cannot remove minerals, heavy metals, and organic chemical pollutants.

The water purifier of ultrafiltration membrane, if it is multi-stage filtration, there is a softening filter element in it, which can remove a part, and it is better to remove heavy metals, or a water purifier.

Under normal circumstances, the water purifier can filter out heavy metals, but the filtration effect and process of different types of water purifiers are also different, and the water purifier with activated carbon or RO reverse osmosis membrane device can remove the metal ions dissolved in the water and the microorganisms contained in it, which can be removed, and the filtered water can be directly drunk.

Question: When the underground well water is pumped out, it is very clear, but when it is not pumped, the water quality becomes slightly turbid and looks like some pale green, what is the reason?

Whether the ultrafiltration process can remove heavy metals and whether the ultrafiltration water purifier can remove heavy metals are two different concepts.

1. Theoretically, the simple ultrafiltration process cannot remove the dissolved heavy metal ions.

2. If there are heavy metal blocks and heavy metal particles in the water, they can still be removed.

3. We usually use the ultrafiltration membrane as the core filter material of the water purifier, commonly known as the ultrafiltration water purifier, but the ultrafiltration water purifier does not only use the ultrafiltration membrane as a treatment process, if there are other filtration processes such as KDF and ion exchange fiber, then it can still remove heavy metals.

Conclusion: Whether the ultrafiltration water purifier can remove heavy metals depends on the state of heavy metals in the water and the overall configuration of the water purifier.

The pore size of ultrafiltration cannot retain heavy metals and requires reverse osmosis removal.