Multi-medium shallow sand filter

Product Overview

Multi - medium shallow sand filter, mainly used in industrial areas of circulating water, feed water, and wastewater filtration. HGBMF's medium filtration system utilizes deep media to effectively remove particulate matter and reduce turbidity. If loaded with a specific filter material, such as activated carbon, zeolite, can also adsorb the corresponding organic matter, ions and so on. The fluidization device in the system (bottom drainage device) can fluidize the filter medium, remove the pollutants trapped in the medium, and discharge them, and get a thorough cleaning.

Principle of Operation

Washing filtration state: when the system is in the filtering state, the unfiltered water is evenly distributed through the unique water distributor developed by itself, and the water is laminar flow through the filler layer in the filter (refined homogeneous quartz sand/garnet). When water flows through the packing layer, impurities are trapped in the packing layer. The bottom of the filter has a plurality of evenly distributed water collector, the filtered water will be evenly collected and drawn out, advection filtration, can make the filter filter at high flow rate, still can achieve a better filtering effect.

Backwash state: with the continuous accumulation of impurities in the packing layer, the internal indenter loss will increase. When the loss of inlet and outlet water pressure heads reaches the set value, the system will automatically activate the constant pressure device to convert it to the backwashing state. When the backwashing is over, the hydraulic valve changes the water supply direction to realize backwashing one by one, which is more convenient to clean the accumulated impurities.

When the system is in the state of backwashing, filtration still continues. The standard unit sand cylinder to be backwashed is not filtered, and other standard unit sand cylinders in the system are still filtered. The filtered clean water is used to backwash the standard unit sand tank, and the rest is sent to the user. Backwash sewage is discharged through the backwash outlet of the hydraulic valve. In the high-speed sand cylinder automatic filtration system, the special water collector design can make the packing between the packing rub each other, maximize the backwash efficiency, reduce the required backwash water (clean water), at the same time, there is no running material phenomenon in the backwash. The backwashing time of one standard unit sand cylinder is 2 minutes. After the backwashing is finished, the loss of the pressure head inside the sand cylinder of the standard unit is reduced to a reasonable range, the constant pressure device gives a recovery signal, the hydraulic valve is restored to the filtering state, and the next standard unit sand cylinder is ready to enter the backwashing state.

Scope of application

1, industrial water filtration - there are certain system requirements for water quality. Such as: steel oxygen gun water, boiler, heat exchanger water filtration, can filter out the impurities in the water, to avoid the blockage of the pipeline and nozzle.

2, industrial circulating water filtration system.

3, raw water treatment - surface river water, lake water, sea water, reservoir water, well water and urban tap water as a source of urban small quality water supply filtration, remove the sand in the water, suspended matter, algae, organic matter and so on.

4, agricultural irrigation - especially suitable for high flow, good impurity content of water sources, such as irrigation irrigation, parks and golf courses on the lawn irrigation.

5, food processing industrial water, paper industry, power plant industrial circulating water treatment, industrial and medical treatment of purified water. Industrial production water recycling, industrial waste water treatment.

6. Aquaculture, swimming and water parks.

Product Features