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Purified water equipment usually needs a reverse osmosis device to filter the pretreated water, and it is often installed in a two-stage reverse osmosis device.
What is the main difference between the first-stage reverse osmosis and the second-stage reverse osmosis? Figure 1 Jingderui purified water equipment First, let's understand "reverse osmosis".
The water that has been roughly filtered and then passed through the reverse osmosis membrane is reverse osmosis filtration.
The reverse osmosis membrane is a semi-permeable membrane, which can prevent calcium, magnesium and sodium.
, iron and other large ions pass through, in order to ensure the effect of reverse osmosis and protect the reverse osmosis membrane, the ion-containing water is squeezed through the reverse osmosis membrane under pressure by using a booster pump, thereby forming two kinds of water, all of which pass through the reverse osmosis membrane.
The water is the finished water, and the effluent conductivity is ≤10 microsiemens.
It enters the point of use, and the water that has not passed through the reverse osmosis membrane is discharged as concentrated water
.
The principle of two-stage reverse osmosis is the same as that of reverse osmosis.
Its function is to further remove the salt (calcium, magnesium, sodium, iron and other ions) in the water to further improve the water quality.
The secondary high-pressure pump enters the secondary reverse osmosis system, and the water that passes through the secondary reverse osmosis membrane is the finished water, and the effluent conductivity is ≤2 microsiemens and enters the point of use
.
It can be seen that the use of two-stage reverse osmosis is equivalent to further removing ions in the water to ensure the quality of the effluent
.
Therefore, if you need to prepare high-quality purified water, it is recommended to use one-stage reverse osmosis + two-stage reverse osmosis
.
What is the main difference between the first-stage reverse osmosis and the second-stage reverse osmosis? Figure 1 Jingderui purified water equipment First, let's understand "reverse osmosis".
The water that has been roughly filtered and then passed through the reverse osmosis membrane is reverse osmosis filtration.
The reverse osmosis membrane is a semi-permeable membrane, which can prevent calcium, magnesium and sodium.
, iron and other large ions pass through, in order to ensure the effect of reverse osmosis and protect the reverse osmosis membrane, the ion-containing water is squeezed through the reverse osmosis membrane under pressure by using a booster pump, thereby forming two kinds of water, all of which pass through the reverse osmosis membrane.
The water is the finished water, and the effluent conductivity is ≤10 microsiemens.
It enters the point of use, and the water that has not passed through the reverse osmosis membrane is discharged as concentrated water
.
The principle of two-stage reverse osmosis is the same as that of reverse osmosis.
Its function is to further remove the salt (calcium, magnesium, sodium, iron and other ions) in the water to further improve the water quality.
The secondary high-pressure pump enters the secondary reverse osmosis system, and the water that passes through the secondary reverse osmosis membrane is the finished water, and the effluent conductivity is ≤2 microsiemens and enters the point of use
.
It can be seen that the use of two-stage reverse osmosis is equivalent to further removing ions in the water to ensure the quality of the effluent
.
Therefore, if you need to prepare high-quality purified water, it is recommended to use one-stage reverse osmosis + two-stage reverse osmosis
.
