1.The Sand Filter is made up of concrete filter, flange feed, filter discharge, flushing water discharge and discharge device.

2.It consists of stainless steel feeding pipe, feed distributor, sand guiding hopper, and air lift pump bushing.

Product detail

Original: Jiangsu, China

Certification: ISO9001, ISO14001, etc.

Price: Negotiable

Material: SUS304

Voltage: 380V 50Hz, the voltage can be as local demand

Payment term: TT, LC

Delivery date: Negotiable

Packing: export standard

Market: Middle East/ Africa/Asia/South America/Europe/North America

Warranty: 1 year

MOQ: 1 set

Working principle of Continuous Backwash Filters

The original water enters the inside of it through the inlet pipe, and then the filter can be flocculated and filtered through the filter layer after the water distributor is evenly distributed, and the treated water is gathered to the overflow in the upper part of the filter. In this process, the raw water is filtered, the content of pollutants in the water is reduced, and the content of the pollutants in the quartz sand is increased, and the content of the pollutants in the lower layer is higher than that of the upper layer filter. The air lift pump in the center of the filter is cleaned in the sand cleaner at the top of the filter under the action of the air compressor, and then returned to the filter bed after cleaning. At the same time, the discharge of the pollutants produced will be cleaned.

Because the sand filter material is in the top-down movement state in the filter, it stirs the raw water, so the agitation flocculation can be completed in it. Because the filter material in the filter is clean and timely, it can bear a higher influent pollutant concentration. The special internal structure and its own characteristics can make coagulation, clarification and filtration all completed in the same pool.

Based on the countercurrent principle, the treated water enters the system through the inlet distribution pipe located at the bottom of the equipment, and flows through the top outlet after being treated by tit. The treated water is washed upward through the filter bed. The active sand containing the treated impurities is transported from the cone bottom of the equipment to the cleaner on the top by the air lift pump. The dirty particles are separated from the active sand through the turbulent flow, and the impurities are discharged through the cleaning water exit. The net sand is returned to the sand bed by self weight.

Each filter unit in it is composed of 8 sets of filter elements, and the handling capacity of each unit is 400m₃/h. The processing scale of it can be flexibly combined according to the change of water treatment volume, and it is easy for reconstruction and expansion.

The control system includes pneumatic control system and electric control system. The pneumatic control system controls the air flow and air pressure of the air sand pump. The electric control system provides manual and automatic control for the product, provides power supply and displays alarm to ensure the safe operation of the water system, and complete the linkage and full automatic operation of the equipment in the reused water vehicle.

Application

It are widely used in various water treatment situations, especially for drinking water, industrial process water and sewage and industrial wastewater treatment. It is a continuous contact filtration equipment which integrates flocculation, clarification and filtration. It can be used for three stage filtration in water reuse project, which can remove suspended matter and colloid in water, and can also remove bacteria, algae, virus, oil, iron and manganese oxide.

Equipment characteristics

It has high efficiency and works continuously for 24 hours without shut-down and backwashing. No backwash valves and standby filters are required.

The operation cost  is low, and no backwash pump with high lift and large flow rate is needed to reduce operation cost.

The maintenance cost is low. In the course of operation, the active sand filter does not have any rotating parts except the quartz sand filter material, and the failure rate is low and the maintenance cost is saved.

Low one-time investment, no single set of coagulant pool, clarifying pool and other facilities, no backwashing pumps and electric, pneumatic valves and other equipment, small amount of project, one-time investment.

The water loss  is small. Because of the single stage filter material and the filter material is clean and timely, the loss of the active sand filter head is very small, about 0.5m.

Sand Filter for loose inlet water quality, long term 150mg/L concentration SS influent water quality and effluent quality unchanged.

It has good filtration effect and stable effluent quality. The filter material is clean and timely, which ensures high quality and stable effluent effect and no cyclical fluctuation of water quality.

It is easy to expand and reconstruct. The unit operation mode can flexibly increase or delete the quantity of filter according to the change of water volume, so that it is easy to expand and expand.

Experience and markets

KHN is professional Sand Filter manufacturer. Products are well sailed all over the world, got many compliments from customers.

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