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1000L Reverse Osmosis Water Purifier Machine For Domestic Water
The original water tank
1) Role: Overcome the instability of water supply network, and
ensure the stable and continuous water supply of the whole system;
At the same time, it also provides a guarantee for the long-term
reliable performance of each equipment.
2) Selection: PE or stainless steel water tank.
3) Control: The water tank is equipped with a high-water float
valve and a low-water level switch.
It has the advantages of high reliability, low price, simple
structure, easy installation and so on.
When the water level is high, the float valve closes and stops
filling.
When the water level is low, the high water float valve opens and
begins to fill the tank.
At the same time, the low water level switch is disconnected and
the booster pump stops working.
2. Raw water pump
1) Role: Provide necessary working pressure for pretreatment
equipment.
2) Selection: The working pressure of booster pump shall be
determined according to the design pressure drop of each
pretreatment
equipment (the maximum pressure drop of each filter equipment is
0.05mpa) and the front pressure of high-pressure pump shall not be
less
than 0.5kg /cm2.
3) Control: after the pump, adjust the pressure and water intake
with a regulating valve.
3. Mechanical filter (quartz sand filter)
1) Function: The raw water first passes through a mechanical
filter, in which 12-24 purposes of fine quartz sand is placed, so
that suspended
impurities such as flocculant and rust in the raw water are trapped
in this process.
In order to ensure the normal operation of the filter, the filter
must be washed and backwashed regularly.
2) Selection: FRP (fiberglass reinforced plastic) containers are
selected.
3) Control: Manual controller is adopted for the backwashing
operation of the mechanical filter. The filter should be cleaned
once a day, and
the cleaning time is 10-20 minutes.
4. Activated carbon filter
1) Function: This process USES activated carbon filter as the
pretreatment of reverse osmosis unit, which is very important.
Reverse osmosis system requires inlet water index SDI≤5, residual
chlorine & LT;
0.1 mg/L.
In order to meet the inlet water requirement, the raw water should
be further purified to achieve the inlet water index of reverse
osmosis.
A carbon filter is set in front of the reverse osmosis unit, which
has two main functions:
1. Adsorb part of organic matter in water, with an adsorption rate
of about 60%
2. Adsorb residual chlorine in water.
Inorganic colloid, organic colloid and soluble organic polymer
impurities with the size of 10-20 angstrom and residual chlorine
are difficult to
remove in sand filter.
Activated carbon was used to adsorbed granularity about dozens of
Mr Actives, is due to its structure exist a large number of average
pore
diameter in 20 to 50 angstrom micro holes and cracks, the structure
characteristics of activated carbon, make its surface adsorption
area can
reach 500-2000 m2 / g, as a result of the general organic molecular
diameter is slightly less than 20 to 50, so the adsorption effect
of
activated carbon has a strong presence of organic matter.
In addition, activated carbon has a strong dechlorination ability.
Due to the strong oxidation of residual chlorine, residual chlorine
reacts with
carbon to produce carbon dioxide and chloride ions, so only a small
amount of carbon is lost. Therefore, activated carbon can be used
for
dechlorination for a long time.
Activated carbon not only has the above functions, but also can
remove the peculiar smell and pigment in water and improve the
clarity of
water. After activated carbon is used for a period of time, its
adsorption capacity decreases and it needs to be regenerated or
replaced.
Therefore, after the raw water passes through the carbon filter, it
can greatly improve the water quality and reduce the pollution to
the reverse
osmosis membrane. The treated water quality can meet the inlet
water quality requirements of the reverse osmosis device (residual
chlorine & LT;
0.1 mg/L).
2) Selection: Glass fiber reinforced plastic container with an
expansion rate of 40%.
3) Control: The activated carbon filter is controlled by manual
controller. Since the activated carbon filter absorbs a large
amount of
suspended impurities in its work, washing and backwashing must be
carried out every day to ensure the normal operation of the system,
and
the washing process takes 15-30 minutes.
5. Automatic water softener or dosing device
1) Action: The process of removing hardness (Ca2+, Mg2+) from water
is called softening.
This device fills 001×7 strong acid Na ion exchange resin and
replaces calcium and magnesium ions in the raw water with sodium
ions to
make the residual hardness in the raw water lower than 0.03mmol/L.
The purpose of softening is to prevent scale formation on the
surface of reverse osmosis membrane so as to prolong the service
life and
treatment efficiency of reverse osmosis membrane.
2) Selection: The water softener is a glass fiber reinforced
plastic container.
3) Control: The control system adopts the American automatic
control valve type.
According to the set time/flow rate, the control valve head can
automatically regenerate resin to complete the salt absorption,
backwash, flush,
water injection process.
The water softener is equipped with a regeneration tank. The salt
amount and water amount in the tank should be checked daily, and
the salt
should be replenished timely (iodized salt and other salt with
additives are prohibited).
6. Precision filter
1) Function: Precision filter is also called security filter.
It is a treatment process before raw water enters the reverse
osmosis membrane device.
PP filter element has the characteristics of large filtration flow,
large pollution load, small pressure loss, can intercept impurities
of different
particle sizes, set surface filtration and deep filtration in one.
After a certain period of use of precision filter, there is also
blockage phenomenon. Therefore, after a certain period of use, the
PP molten
injection filter element must be replaced. The basis for
replacement: the pressure difference before and after precision
filter should be
changed at 0.05-0.1mpa.
2) Selection: Stainless steel containers are selected.
7, high pressure pump
1) Function: The high pressure pump is the working pressure of
water production flow and water quality required for the reverse
osmosis
system.
After the filter water through the pump body to reach about 10
kilograms of pressure, to meet the inlet pressure of the membrane
body, to
ensure the water output of pure water.
2) Type selection: Grantford vertical multistage high pressure pump
is adopted according to the working pressure required by reverse
osmosis membrane.
3) Control: When the indicator of the raw water pressure gauge
reaches 2KG, press the water producing switch and the high-pressure
pump
starts to produce water.
In front of the high-pressure pump, there is a pressure protection
switch. When the inlet pressure is less than 1KG, the pressure
protection
switch will close and the high-pressure pump will stop working.
8. Reverse osmosis pure water equipment (pure water equipment)
1) Function: Reverse osmosis unit is the main part of purified
water production line.
This device adopts the energy saving composite membrane ESPA type
reverse osmosis membrane component produced by Heiden Electric
Group of Japan.
ESPA series is a desalination film of brackish water with high
desalination rate.
High water flux can be obtained under low operating pressure with
an average desalination rate of 99.5%.
Due to the advantages mentioned above, ESPA membrane provides more
space for the selection of water pump, pressure vessel, pipeline,
valve and other supporting equipment.
And the use of less power motor can meet the needs of the work.
At the same time, ESPA film features high water flux and high
desalination rate, which greatly reduces the equipment
manufacturing cost and
system equipment investment cost, and can save a lot of energy,
reduce the operating cost of the system, and improve water quality.
Model Selection: Hyde Energy ESPAI-4040/8040.
The reverse osmosis unit is designed to produce water at 25℃, and
the water utilization rate is 70%.
9. Water tank (original water tank)
Role: Reserve reverse osmosis product water and provide stable
water supply for the next level system.
RO System Pictures