Gold Member Since 2011
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Peide Water Treatment Equipment Co., Ltd.

Sand Filter, Water Filtration, Water Treatment Plant manufacturer / supplier in China, offering Self Flushing Continuous Flow Sand Filter Water Filtration, Customized Water Treatment System Water Filter (ISO9001: 2008), Automatic Self Cleaning Irrigation Water Treatment Water Filter (ISO9001: 2008) and so on.

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Self Flushing Continuous Flow Sand Filter Water Filtration

FOB Price: US $4,800-5,000 / Piece
Min. Order: 1 Piece
Min. Order FOB Price
1 Piece US $4,800-5,000/ Piece
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Production Capacity: 2, 000PCS/Year
Transport Package: Wooden Packaging
Payment Terms: L/C, T/T, D/P, Paypal, Money Gram

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Basic Info
  • Model NO.: HSLQ-T
  • Motive Force: Electric power
  • Performance: Efficient Filtration
  • Filtration Area: 0.3-7.0 M2
  • Cod Removal: 8~1.6mg/Mgss
  • Ammonia Removal: 10~20%
  • Specification: ISO9001: 2008
  • HS Code: 8421299090
  • Usage: Environmental Protection, Chemical Industry
  • Style: Vertical
  • Certification: SGS, ISO
  • BOD Removal: 0.3~0.6mg/Mgss
  • Turbidity: <0.3ntu
  • Trademark: PEIDE
  • Origin: China
Product Description

Self Flushing Continuous Flow Sand Filter Water Filtration


Flow sand filter Function:

 Trap organics,suspended solid,colloidal solid,microorganisms in water.
 Remove nitrogen and phosphorus 
 Reduce COD(Chemical Oxygen Demand) in water
 Flow sand filter Working Principle:   
Continuous sand filter is widely used in many fields,especially for drinking water,
industrial process water,sewage and industrial waste water purification. It is a
 kind of continuous filter,combined flocculent,settling,filtering together.
tertiary filtration of reclaimed water, the gravity sand filter offers advanced 
treatment:efficiently remove suspended 
and colloidal solid, oil,iron and 
manganese oxide,and kill the bacterial,algae,virus in water.

Route of water: Raw water enter into inlet pipe(1)feed into sand filter(2)and 
water distributor(3) into sand bed(4), 
Raw water will be purified when passing through the sand bed.
The filtrate flow out from(5).
Route of Sand: when the water flow upward,sand bed move downward
 continuously.The dirty sand was drawn from the bottom of sand bed,
and begin to wash the dirty sand,return the clean sand back to 
the top of sand bed(7)
Route of Air: Circulation of sand is based on "gas principle",compressed air 
will push the mixture of sand and water into the center pipe(8),and move
 upward.Suspended solid and sand separated by strong friction.Reject water
 pour out (9).Sand falling down in sand washer,amount of sand in air lifting
 pipe is decided by the amount of compressed air.
Sand Washer: The washer(10)with its well-designed hydraulic features is positioned around the airlift pipeline.
The sand particles fall through the washer,where they are finally washed by 
a small amount of clean filtrate,flowing 
through the washer counter currently.
The filtrate flow is generated by a difference in discharge level between the
filtrate(11) and the wash water(9)

Self Flushing Continuous Flow Sand Filter Water Filtration
Control Manners of Flow sand filter
Automatic control manner: include electric control and Air control.
Electrical control cabinet:start up, operation,alarm and other functions.
During normal operation, the electrical 

control cabinet make it continuous flushing; when running abnormal, 
the warning signal will be transmitted to the control box, then the program 
will be issued a directive to stop filtering.

Air control cabinet: control the compressed air passing through the solenoid 
valve and feed into the air flow 
The pressure switch is set to detect the inlet pressure of the solenoid valve, 
so that when the compressed air pressure is lower than the set value, 
the pressure switch and the alarm starts, while stopping the supply of 
compressed air. Further, when the pressure control valve or solenoid valve fails,
 it will alarm and stop the supply of compressed air.

Characteristics of Flow sand filter 
High Efficiency: Work online 24 hours,no need stop to backwash
Low operating cost:No need the high flow and high lift backwash pump,
and it can be programmed to control intermittent wash sand control mode, 
greatly reducing operating costs.

Low maintenance cost: without any moving parts, low failure rate during 
operation and low maintenance costs.

Low one-time investment: no coagulation tank, 
clarify pool and other facilities, filters, high utilization

Lower requirements on inlet water quality: long time bear SS: 150mg / L. 
Can withstand short time SS:250mg / L.
Low Head Loss: Due to the single-stage filter,we clean the sand timely, 
head loss will be reduced to 0.5m 
Efficient Filtration, 
Stable outlet water quality: Due to the timely clean filter can ensure stable 
and efficient filtration, no water quality cyclical fluctuations.

Easy for expansion: Unit operating mode can be adjusted according to changes
 in water quality and quantity of filters, easy to renovate and expansion of 
existing facilities.

Flow sand filter Application:
Appliedto the town water supply, water plants, municipal wastewater treatment,
 industrial wastewater treatment,recycling cooling water treatment, process water treatment, seawater purification, algae laden  water filtration.

Self Flushing Continuous Flow Sand Filter Water Filtration
Flow sand filter Parameter
Surface load in the unit time per filter surface impurities trapped, 
units:mgSS / m2h.

Recommended active sand filter surface load values are as follows:
Continuous sand filter can withstand a higher load than the value of the surface
 in a short time.

Filtering area can be determined by the largest surface area of the filter load 
and raw water quality and quantity.

For security, the actual selection should be slightly larger than the calculated
 value of the filter area.

Work flow rate can be calculated by the raw water flow and filters
 the wash service area. Note that when the 

flow rate rises to a certain level, the biological flocculation experience 
disintegration or dissolution of the filter

or filters will produce flow phenomenon. In the modeling work should ensure 
That the filter flow rates below this evel.

Temperature factors should also be considered, in the low-temperature region,the sand depth is generally 
greater than 2 meters.
Under normal operating conditions, the activity of continuous sand filter
 can ensures the following effects:

SS<5mg/l(dose flocculant)
<10mg/l(without flocculant)
BOD removal:0.3~0.6mg/mgSS
COD removal:.8~1.6mg/mgSS
Color: <5 degrees
Turbidity: <0.3NTU
Algae removal rate close to 100%
Table of Continuous Sand Filter
Model Filtration area m2 Height of sand bed (m)   
 HSLQ-03T 0.3 1 1.5 - -
 HSLQ-07T 0.7 1 1.5 2 -
 HSLQ-15T 1.5 1 1.5 2 -
 HSLQ-20T 1.5 1 1.5 2 -
 HSLQ-30T 3.0 1 1.5 2 -
 HSLQ-45T 4.5 - 1.5 2 -
 HSLQ-50T 5.0 - 1.5 2 2.5
 HSLQ-70T 7.0 - 1.5 2 2.5
 HSLQ-50T 5.0 - 1.5 2 2.5
 HSLQ-60T 6.0 - 1.5 2 2.5
 HSLQ-70T 7.0 - 1.5 2 2.5


How to choose the suitable model:
1.Choose the height of sand bed by inlet and outlet water quality.
2.B type is concrete structures, T type is movable active sand filters; 
material can be SS304, SS316L,FRP, 

high chrome alloy steel, carbon steel (corrosion-resistant) or other specified materials.
Stripping mode: you can select internal circulation or external circulation. 
SS:Less than or equal to  5mg/l(dose flocculant),
SS:Less than or equal to 10mg/l(without flocculant)
Total phosphorus removal:70~95%(dose flocculant)
Total phosphorus removal:5~20%(without flocculant)
COD removal:20~45%
Ammonia removal:10~20%
NOTE: To improve the COD and ammonia nitrogen removal, turn to the use, 
 of biological treatment



Self Flushing Continuous Flow Sand Filter Water Filtration
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