Pretreatment water treatment 30m3/hr sand filter system for drinking water supply

Removing suspended solids smaller than 40 microns requires filters with either two or three layers of filter media. These are referred to as dual-media filters or multi-media filters. When sized properly and with the correct configuration of filter media, these filters can remove suspended solids as small as 5 micron.

Units are skid-mounted, factory assembled, wired, and tested, and delivered ready for installation. Piping, valves, filter media, pressure gauges and accessories are included with filter systems. Solar power, media air scour, and rinse cycle are available as options. Filter systems are engineered to require little maintenance. A separate source of water supply or a pump for backwash are seldom needed.

Multi-media filter to make one or several filter media makes water of high turbidity flow through agranular or non-granular 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 sand, anthracite and manganese sand, etc. they are mainly used for turbidity removal of water treatment, water softening and pretreatment of pure water in preceding stages and the outflow turbidity can be below 3 degrees. 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 supplying with undemanding water quality, circulating cooling water, reuse water treatment of wastewater and recycled water, etc.

Quartz sand filter

Quartz sand filter can effectively remove suspended solids in the water and has significant effects on the removal of colloids, iron, organics, pesticides, manganese, bacteria, viruses and other pollutants in the water. besides advantages of small filtration resistance. large specific surface area, strong acid and alkali resistance, resistance to oxidation, PH scope of 2-13 and anti-pollution. As a unique advantages of the quartz sand filter, the filter is able to run self-adaptively through the optimization of the filter media and filter design, so that the filter material has a strong adaptivity to raw water concentration, operating conditions, pre-disposal process. i.e. the filter bed automatically forms a non-uniform state during filtration, which helps to guarantee the water quality under a variety of operating conditions and spread the filter material when backwashing, achieving good cleaning effect. The sand filter has advantages including fast filtering speed, high filtration precision and large interception capacity, etc. The filter is used in the industrial water, domestic water and municipal water systems requiring outflow turbidity of not greater than 5mg/I and complying with drinking water quality standards and for the removal of suspended solid sand solids in industrial wastewater: it can be used as ion exchange and pretreatment for softening desalination system and can also be used in the coarse filtration of water with undemanding industrial water quality, swimming pool circular processing system and cooling circulating water purification system.

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.

Backwash

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.