Water Sand Filter

Description

A water sand filter is used as a primary or preliminary filter in water treatment to remove heavy metals, sand, organics, and colloid. It has the features of no secondary pollution and lower operation costs.

Water Sand Filter Advantages

Cost-Effective

The materials used in the construction of these filters are relatively inexpensive, and the maintenance costs are usually lower than more complex filtration systems.

Simple Design and Operation

Water sand filters have a straightforward design, making them easy to operate and maintain. They don’t require complex mechanisms or a high level of technical expertise for installation and routine maintenance.

High Efficiency in Particle Removal

Sand filters are highly effective at removing suspended solids and particles from water. The sand media traps and retains particles, preventing them from passing through and resulting in cleaner water.

Versatility

Water sand filters can be used in various applications, including drinking water treatment, swimming pool filtration, and industrial water treatment. Their versatility makes them suitable for a wide range of water purification needs.

Reliable Performance

When properly maintained, water sand filters provide reliable and consistent performance over time. They can handle fluctuations in water flow and load without a significant decrease in efficiency.

Scalability

Sand filters are scalable and can be adapted to different sizes and capacities. Whether for a small residential pool or a large municipal water treatment plant, the design can be adjusted to meet the specific requirements of the application.

Natural Filtration

The process of filtration in water sand filters mimics natural groundwater filtration. This means that sand filters can provide a more environmentally friendly solution compared to some chemical treatment methods.

Long Service Life

With proper maintenance, water sand filters can have a long service life. Regular backwashing and occasional replacement of the sand media contribute to sustaining their effectiveness over an extended period.

Low Energy Consumption

Sand filters typically have low energy requirements, contributing to their cost-effectiveness. They don’t rely on electricity-intensive processes, making them energy-efficient compared to some alternative water treatment technologies.

Compatibility with Other Treatment Methods

Water sand filters can be used in combination with other water treatment methods, such as chemical disinfection or activated carbon filtration, to achieve a comprehensive purification process.

Water Sand Filter Features

• Filter speed: 8-12m/h
• Backwashing intensity: 9-15L/0.5s㎡
• Backwashing time: 5-7 minutes
• Inlet pressure: ≥0.4Mpa; backwashing inlet pressure: ≥0.2Mpa
• Expansibility: 20%-50%
• The materials used for construction are 304 stainless steel and carbon steel.

Working Principle

A water sand filter uses control valves to change the inlet/outlet directions. When water flows down through the sand from top to bottom, it is filtered; when water flows up from bottom to top, it is being backwashed. The quartz sand is packed in the following manner:

• Main removal layer: Quartz with a diameter of 0.5-1.0mm and a height of 700mm
• Two support layers: Quartz with a diameter of 1-2mm and a height of 150-200mm, and quartz with a diameter of 2-3mm and a height of 150-200mm.

For raw influent, the removal capacity is 0.5-1.0kg/m³. For influent treated with lime, the removal capacity is 1.5-2.0kg/m³, and for influent after coagulation, the removal capacity is 2.5-3.0kg/m³.

Water Sand Filter Parameters