Water purifying system and backwash module control method thereof
AssigneeDoosan Heavy Industries Construction Co., Ltd
InventorsWoo Nyoung Lee, Sung Won Park
Life of this patent
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Abstract
Disclosed herein is a water purifying system, including: a raw water tank configured to store raw water; a filter unit configured to include a plurality of filtration modules for purifying the raw water and a plurality of valves for feeding or cutting off the raw water; a raw water pump configured to feed the raw water from the raw water tank to the filter unit; and a backwash module configured to feed backwash water to the filter unit, in which some of permeate water permeated by the filter unit is fed to the backwash module to be used as the backwash water and a feed pressure of the backwash water is fed by the raw water pump.
Claims19
A method of controlling a backwash module configured to perform a backwash by feeding backwash water to a raw water filter, the backwash module including a first inlet configured to receive raw water from a tank storing the raw water, a second inlet configured to receive a portion of permeate water permeated by the raw water filter, a first outlet through which the received raw water is discharged, and a second outlet through which the backwash water is discharged, the method comprising:
- using the received raw water to apply pressure to the portion of permeate water such that the backwash module feeds the portion of permeate water to the raw water filter as the backwash water, and
- using the received portion of the permeate water to apply pressure to the received raw water such that the backwash module feeds the raw water back to the tank.
A backwash module configured to perform a backwash by feeding backwash water to a raw water filter, the backwash module comprising:
- a first inlet configured to receive raw water from a tank storing the raw water;
- a second inlet configured to receive a portion of permeate water permeated by the raw water filter;
- a first outlet in fluid communication with the raw water tank and through which the received raw water is discharged to the raw water tank;
- and
- a second outlet through which the backwash water is discharged,
- wherein the backwash module includes a pressurized volume formed as one of a pressure vessel and a pressure tank, and
- wherein the pressurized volume is compartmentalized by first and second porous plates to include:
- a first compartment communicating with the first inlet and the first outlet;
- a second compartment communicating with the second inlet and the second outlet;
- and
- a common compartment configured to receive the raw water through the first porous plate and to receive the backwash water through the second porous plate.
A backwash module configured to perform a backwash by feeding backwash water to a raw water filter, the backwash module comprising:
- a first inlet configured to receive raw water from a tank storing the raw water;
- a second inlet configured to receive a portion of permeate water permeated by the raw water filter;
- a first outlet through which the received raw water is discharged;
- a second outlet through which the backwash water is discharged;
- and
- first and second porous plates configured to compartmentalize a pressurized volume in the backwash module, the pressurized volume including a first compartment communicating with the first inlet and the first outlet, a second compartment communicating with the second inlet and the second outlet, and a common compartment configured to receive the raw water through the first porous plate and to receive the backwash water through the second porous plate,
- wherein the first outlet is in fluid communication with the raw water tank and the raw water from the first compartment is fed back to the raw water tank via the first outlet.
Dependencies are inferred from the claim text.