Efficient Continuous Sand Filter System from China Suppliers and Factory for Reliable Effluent Cleaning
Product Description
The continuous sand filter is mainly composed of five parts: water filtration system, sand circulation system, compressed air system, sand washer, and monitoring and control system:
Water filtration system
Raw wastewater enters the sand bed from the water distributor through the water inlet pipe. The water is purified as it passes upward through the sand bed. After filtering, the clean water is discharged from the water outlet and enters the clean pool.
Sand circulation system
While the water flows upward, the sand bed continuously moves downward. Driven by compressed air, the dirty sand is lifted from the bottom of the sand bed through the sand lifting pipe to the sand washer and cleaned. The clean sand falls back to the top of the sand bed.
Compressed air system
Pass the air into the storage tank through the air compressor, and then pass it into the bottom of the sand lifting pipe. The mixture of dirty sand and water is pushed upward through the sand lifting pipe. Strong friction will push the dirty suspended solids upward, separated from the sand. Released at the top of the riser pipe, the dirty water is discharged.
Sand washer
At the top of the sand lifting pipe, the sand falls through the annular space of the sand washer and is cleaned by filtered water in the opposite direction to the falling direction of the sand. The flow of filtered water is driven by the liquid level difference between filtered clean water and sand washing water.
Monitoring and control system
The main control points are compressed air pressure, water inlet volume, sand circulation volume, etc. By equipping an online monitoring system, stable process operation goals can be achieved.
Frequently Asked Questions
A continuous sand filter is a water purification system that filters raw wastewater upward through a moving sand bed. The sand bed continuously moves downward, allowing filtration and sand washing to occur simultaneously without interrupting the system's operation.
Dirty sand is pushed upward from the bottom of the sand bed to the sand washer at the top using compressed air. As the sand falls through the sand washer, it is cleaned by filtered water flowing in the opposite direction, separating suspended solids from the sand.
The compressed air system introduces air to the bottom of the sand lifting pipe. This pushes the mixture of dirty sand and water upward, creating friction that separates suspended solids from the sand particles before discharging the dirty water.
No, the continuous sand filter does not require backwash shutdowns. The sand circulation and washing processes happen continuously while the filtration system remains fully operational.
The monitoring and control system primarily monitors compressed air pressure, water inlet volume, and sand circulation volume to ensure stable and efficient process operation.