dmf shallow medium filter

Product Overview

dmf shallow medium filter in the fluidization device (bottom drainage device) can fluidize the filter medium, remove the pollutants trapped in the medium, and discharge it, get 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.

Product Features

1, small size, easy to install, save space. Can be installed outdoors, no need to build, save the cost of civil construction, covers a small area, indoor and outdoor installation, can also be layered installation, strong adaptability; Compact structure, space saving, good anti-corrosion performance, indoor and outdoor installation.

2. The equipment has good anti-corrosion performance and long service life.

3, filter water, filter effect is good, filter flow rate is fast, the normal filter speed can be about 40m/h, according to the water quality can reach 60m/h; Filter backwash using product water, and do not have booster pump and backwash pump; The backwashing time is 2-3min, and the backwashing water is less than 3m3. High filtration accuracy, impurity filtration accuracy can be less than 0.10mm, effluent turbidity can be less than 0.5NTU. The filtration system consists of a standard unit sand cylinder, and the filtration flow rate can be increased from 30.6 m3 / h to 2500 m3 / h.

4. Automatic backwashing: The backwashing of the equipment is automatically identified and controlled by the intelligent control system without manual intervention. Even if the suspended matter in the water fluctuates, the equipment may automatically adapt to it.

5. Uninterrupted water supply; When the equipment is backwashed, the filtration process is carried out at the same time, and the system provides water as usual.

6, the use of unique cloth, water collection device, because of the filter system's unique water distribution system and the uniform water collector makes the water flow in the whole filtration process is layered flow, filter sand bed plane in the filtration process is always smooth, the water quality is stable.

7, the use of refined quartz sand or garnet as the filter medium, according to the water quality to choose, filter particle size can be 0.16mm homogeneous filter material 8. Long-term operation cost is low, save electricity, water and maintenance costs. Power saving: The system has a unique automatic backwashing valve, the backwashing of the sand filter tank is not carried out simultaneously, but under the normal operation of the system, it takes turns to backwash one by one, there is no need to consider the setting of backwashing water pump. At the same time, compared with other sand filtration equipment, the lift of the filter pump required is 6-7m lower.

8, save water: the system because of its unique hydrator and water collector, unified specifications tank, so that the backwashing does not need compressed air to make the medium layer of uniform expansion for effective backwashing. Backwash water used is filtered clean water, so the consumption of backwash water is small. The backwashing water of a single tank is only 1m3/ min, and the backwashing time is 2-3 minutes.

9, save maintenance costs, the whole system has no mechanical or electric valve, only rely on the unique multi-function valve to control the backwash system. Due to the unique multi-function valve no wear, long life, no damage record in 10 years, low management costs.

Product Features