Automatic backwash FRP filter tank 15m3/hr water treatment sand filter for drinking water supply

 Multi-media sand carbon filter

Multi-media filter using one or several filter media makes water of high turbidity flow through agranular ornon-agranular material of a certain thickness under a certain pressure, thereby effectively removing suspended impurities in the water and clarifying the water. The commonly used filter materials including quartz, anthracite and manganese sand, etc, are mainly used for turbidity removal of water treatment, water softening and pretreatment of pure water in preceding stages and outflow turbidity can be below 3 NTU. The filter is mainly used for reverse osmosis, electrodialysis, ion exchange as well as softening and demineralization system pretreatment and can also be used as coarse filtration of industry water supply with undemanding water quality, circulating cooling water, reuse water treatment of wastewater and recycled water, etc.

Sand filters are the oldest and most basic form of water filtration and originally consisted of large volumes of sand through which water simply percolated. Modern systems however now include various media layers which allows much more efficient filtration in smaller vessels.

Multi-media sand filters normally consist of three media layers (ie. support base gravel, micro screened sand and anthracite) and are a very economical means of primary filtration to remove the bulk of suspended solids. They are particularly efficient on surface waters for the removal of grit, sediment, turbidity and organic matter but also widely used on oxidised iron ('rust') and other precipitated contaminants such as manganese or scale particles.

Multi-media filters are periodically backwashed (either automatically or manually) by simply reversing the flow and this flushes to waste the accumulated sediment and also regrades the filter media layers.

Operation and maintenance is extremely simple. After initial set-up, the system is virtually self sustaining. With the Performa Head, back-flushing and clearing of trapped contaminates occurs automatically.

Activated carbon filter

Activated carbon filter is used for the removal of color, taste, residual chlorine and organics its main mode of action is adsorption. Activated carbon is an artificial sorbent. Activated carbon has developed pore structure and huge specific surface area, so it has a strong adsorption capacity for the dissolved organics in the water, such as benzene and phenolic compounds, and has better removal efficiency for organic pollutants which are hard to be removed by biological and chemical methods, such as chroma, stench, surfactants, synthetic detergents and dyes, etc. Granular activated carbon is able to remove 85% of Ag A , Cr2 + and Cr04 A 2 in the water Through the activated carbon filter bed, the suspended solid in the water is less than 0.1 mg/L, COD removal rate is generally 40% to 50% and free chlorine is less than 0.1mg/I. It can be used as pretreatment of ion exchange, electrodialysis and reverse osmosis in pure water technology so as to remove organics, colloids and residual chlorine; it can be also used as an advanced treatment mean after the secondary treatment to ensure the quality of reusewater

When the system is in a filtered State, the water flow through the water distributor which was unallowed,comply with shell,the water flow through the filter layer at the horizontal - flow state,as the water flowthe filter material layer, impurities are trapped within the filter layer,The filtered water is collected and evenly through water outflow,flowing parallel,at the high speed ,the filter could work well,and it can reach better effect too.

With the continued accumulation of impurities in filter material layers, increasing loss of head,as the loss of head reaches a certain set limit, system will automatically be converted to the anti - washing, cleaning accumulation of impurities,

Backwashing happens at the differential pressure reaches 0. 05-0. 07Mpa,each time.and while the backwashing is over the differential pressure will back to 0.02-0.03Mpa.

Application:

(1)     Pre-treatment for RO system, electrodialysis, ion exchange device, UF etc .

(2)     Filtering treatment for power plant,chemical, paper making, beverageetc industry etc.

(3)     Destaining, remove organism materials for chemical plant

(4)     Treatment for living water

(5)     Treatment for industry water

(6)     Treatment for swimming pool water

(7)     Bypass filter system for recycling water

(8)     Deturbidness and destaining of ground water, underground water.