Structural Composition
Tank: Made of anti - corrosive carbon steel or stainless steel, it has excellent pressure resistance and corrosion resistance, ensuring the long - term stable operation of the equipment.
Filter Media Layer: Composed of various filter media with different particle sizes and properties. Common filter media include quartz sand, anthracite, manganese sand, etc., which are laid in layers from top to bottom according to the particle size, forming a multi - layer filtration system.
Water Distribution System: Evenly distributed water distributors and collectors ensure that the water flow passes through the filter media layer uniformly, improving the filtration effect.
Control System: It can be manually or automatically controlled to precisely regulate the operation processes such as filtration and backwashing.
Purification Principle: Utilizing the interception, adsorption, sedimentation and other functions of different filter media, when the water to be treated passes through the filter media layer from top to bottom, suspended solids, colloids, sediment and other impurities in the water are intercepted by the filter media, thus achieving water purification.
Product Advantages: Compared with single - media filters, multi - media filters can remove a wider variety and larger particle - size range of impurities through the synergistic effect of multiple filter media. It has the characteristics of high filtration efficiency, strong dirt - holding capacity, stable effluent water quality, low maintenance cost and long service life.
Water Inlet: The water to be treated enters the multi - media filter through the inlet pipe and is evenly distributed above the filter media layer by the water distributor.
Filtration
The water first passes through the upper - layer filter media with larger particle size, intercepting larger - sized impurities such as sediment and large suspended solids.
As the water continues to penetrate downward, the middle and lower - layer filter media with gradually smaller particle sizes further intercept smaller - sized suspended solids, colloids and some organic matters, completing the deep filtration.
The clear water filtered by the filter media layer is collected by the water collector and flows out through the outlet pipe, entering the subsequent treatment process or being used directly.
Backwashing
After the filter has been in operation for a certain period, the impurities intercepted by the filter media layer increase, resulting in an increase in filtration resistance. When the set pressure difference or operation time is reached, the backwashing program is started.
The backwashing water enters from the water collector and passes through the filter media layer from bottom to top, making the filter media layer in a fluidized state. With the scouring action of the water flow and the mutual friction between the filter media, the impurities intercepted on the surface and inside of the filter media are washed away.
The washed - off impurities are discharged from the filter through the drain pipe. After the backwashing is completed, the normal filtration state is restored.
| Features | Details |
|---|
| High - Efficiency Filtration | The combination of multiple filter media can effectively remove suspended solids, colloids, sediment and other impurities in water, increasing the filtration efficiency by 30%. |
| Large Dirt - Holding Capacity | The multi - layer filter media structure provides a larger filtration area and dirt - holding space, resulting in a higher dirt - holding capacity per unit volume of filter media. |
| Stable Water Quality | It can continuously produce filtered water that meets the standards, and the effluent turbidity can be stably controlled below 1NTU. |
| Easy Operation | It has both manual and automatic control modes. In the automatic mode, it can realize the automatic operation of processes such as filtration and backwashing. |
| Strong Adaptability | According to different water qualities and treatment requirements, the types, ratios and filling heights of filter media can be adjusted, making it suitable for various water sources. |
| Low Maintenance Cost | The filter media has a long service life and a long replacement cycle, and the water consumption for backwashing is low, reducing the operation and maintenance costs. |
| Parameter Category | Specific Parameters |
|---|
| Equipment Diameter | 400 - 3000mm (customizable) |
| Equipment Height | 1500 - 4500mm (adjusted according to the diameter and filter media layer) |
| Filtration Flow Rate | 8 - 15m/h (adjustable according to water quality and filter media) |
| Operating Pressure | ≤0.6MPa |
| Operating Temperature | 5 - 45℃ |
| Backwashing Intensity | 10 - 15L/(m²·s) |
| Backwashing Time | 5 - 15 minutes (adjustable according to the actual situation) |
| Filter Media Types | Quartz sand, anthracite, manganese sand, activated carbon, etc. (combinable) |
Pretreatment of Industrial Water
Power Industry: As a pretreatment device for boiler make - up water and circulating cooling water, it removes impurities in water to prevent equipment scaling and corrosion.
Chemical Industry: It pretreats the process water in the chemical production process to ensure the smooth progress of the production process and the stability of product quality.
Electronics Industry: It provides a preliminarily purified water source for production links with extremely high requirements for water quality, such as electronic chip manufacturing, to meet the subsequent deep - treatment needs.
Purification of Domestic Drinking Water
Waterworks: In the tap water production process, it is an important part of the conventional treatment process to improve the quality of raw water.
Secondary Water Supply in Residential Areas: It purifies the secondary water supply to ensure the safety and good quality of residents' water use.
Sewage Treatment
Sewage Pretreatment: It removes suspended solids and large - sized impurities in sewage, reducing the load of subsequent treatment processes.
Reclaimed Water Reuse Treatment: It further filters the reclaimed water after biochemical treatment to improve the water quality of reclaimed water and meet the reuse requirements.
How often do the filter media of the multi - media filter need to be replaced?：The replacement cycle of the filter media is affected by factors such as the quality of the raw water, the amount of treated water, and the filtration flow rate. Generally, filter media such as quartz sand and anthracite are replaced every 3 - 5 years. If the quality of the raw water is poor or the amount of treated water is large, it may need to be replaced every 1 - 2 years. When the effluent water quality of the filter deteriorates significantly and cannot be restored after backwashing, the filter media should be checked in time and replacement should be considered.
How to choose the combination of filter media for the multi - media filter?：The selection of the filter media combination needs to consider the water quality characteristics of the water to be treated. If the water mainly contains suspended solids and sediment, a combination of quartz sand and anthracite can be selected. If the water contains high levels of heavy metal ions such as iron and manganese, manganese sand can be added. If it is necessary to remove organic matter and odors in the water, activated carbon can be used in combination. At the same time, the particle size and filling ratio of each filter media should be determined according to the amount of treated water, filtration precision and other requirements.
With its significant advantages such as layered purification, high - efficiency filtration and strong adaptability, the multi - media filter has become an important device for water purification in many industries. Whether it is industrial production with strict requirements for water quality, the treatment of domestic drinking water to ensure the safety of residents' water use, or the sewage treatment field to promote the recycling of water resources, it can provide reliable solutions. Choosing our multi - media filter means choosing a stable, efficient and economical water quality improvement solution, escorting various water use needs.
If you are interested in this product or have any questions, please feel free to contact us at any time.
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