A wastewater treatment flow sand filter
By introducing roller presses and flow guiding structures into the flowing sand filter, the problems of difficult treatment of colloidal substances and loss of sand and gravel are solved, achieving a more efficient wastewater purification effect.
CN224422057UActive Publication Date: 2026-06-30HANGZHOU YULONG ENVIRONMENTAL TECH CO LTD
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Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- HANGZHOU YULONG ENVIRONMENTAL TECH CO LTD
- Filing Date
- 2025-06-06
- Publication Date
- 2026-06-30
AI Technical Summary
Technical Problem
Existing sand filters have difficulty treating colloidal substances, and increasing the backwashing of clean filtrate can easily lead to the loss of sand and gravel, affecting the wastewater purification rate.
Method used
Design a flowing sand filter that includes a sand washer and a sand lifting pipe. Utilize a roller press and drive mechanism to squeeze colloidal objects through a barrier filter screen. Combined with a backwashing channel and a flow guiding structure, it achieves effective cleaning of colloidal objects and recovery of sand and gravel.
Benefits of technology
It improved the cleaning effect of colloidal objects, reduced the risk of sand and gravel loss, and increased the sewage purification rate.
✦ Generated by Eureka AI based on patent content.
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Figure CN224422057U_ABST
Abstract
This application provides a wastewater treatment flow sand filter, including a sand washing chamber and a sludge discharge chamber, which are connected by a barrier filter screen; a roller press and a drive mechanism; the roller press is rotatably installed in the sand washing chamber and divides it into a pretreatment chamber and a rinsing chamber; the side wall of the roller press has a drop trough connecting the rinsing chamber and the pretreatment chamber; the diameter of the drop trough is larger than the sand particle size but smaller than the colloidal particle size; the mesh size of the barrier filter screen is smaller than the sand particle size; a sand lifting pipe extends through the roller press into the rinsing chamber; the bottom wall of the rinsing chamber has a backwashing channel for clean filtrate to rise; the water used to wash the sand continues to rise and enters the sludge discharge chamber through the barrier filter screen, thereby driving the colloidal particles outward, improving the cleaning effect of the colloidal particles and reducing the risk of sand caking; the sand is blocked by the barrier filter screen, solving the problem of sand loss.
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