Efficient Continuous Sand Filter from China Suppliers and Factory for Superior 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. 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 (FAQ)
How does the water filtration system purify wastewater?
Raw wastewater is introduced into the sand bed from the water distributor via the inlet pipe. As the water flows upward through the sand bed, impurities are filtered out, and the purified clean water is discharged from the outlet into the clean pool.
How does the sand circulation system operate?
While water flows upward, the sand bed moves downward. Compressed air drives the dirty sand from the bottom of the bed up through the sand lifting pipe to the sand washer. Once cleaned, the sand falls back onto the top of the sand bed for continuous reuse.
What is the function of the compressed air system?
The compressed air system introduces air from the compressor into the storage tank and then to the bottom of the sand lifting pipe. This air pushes the mixture of dirty sand and water upward, creating friction that separates suspended solids from the sand before discharging the dirty water at the top.
How does the sand washer clean the dirty sand?
At the top of the lifting pipe, sand falls through the annular space of the sand washer. It is washed by filtered water flowing in the opposite direction. This counter-current flow 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 manage?
The monitoring and control system manages key operational points such as compressed air pressure, water inlet volume, and sand circulation volume. Equipping the system with online monitoring ensures stable and efficient process operation.