Continuous Sand Filter for Efficient Effluent Cleaning - China Suppliers and Factory Solutions
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. of 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
What are the five main components of the continuous sand filter?
The continuous sand filter consists of the water filtration system, the sand circulation system, the compressed air system, the sand washer, and the monitoring and control system.
How is the wastewater purified in the filtration system?
Raw wastewater enters the sand bed from the water distributor. As it passes upward through the sand bed, it is purified, and the clean water is then discharged from the outlet into the clean pool.
How does the sand circulation system move and clean the dirty sand?
While water flows upward, the sand bed moves downward. Driven by compressed air, the dirty sand is lifted from the bottom through a sand lifting pipe to the sand washer. Once cleaned, the sand falls back to the top of the sand bed.
What is the role of the compressed air system?
The compressed air system introduces air into the bottom of the sand lifting pipe. This pushes the mixture of dirty sand and water upward, creating friction that separates dirty suspended solids from the sand before discharging the dirty water.
How does the sand washer separate the sand from contaminants?
Sand falls through the annular space of the sand washer and is washed by filtered water flowing in the opposite direction. This counter-current washing is driven by the liquid level difference between the filtered clean water and the sand washing water.
What parameters does the monitoring and control system track?
The system monitors and controls key process points including compressed air pressure, water inlet volume, and sand circulation volume to ensure stable and continuous operation.