Views: 888 Author: Yosun Publish Time: 2024-12-26 Origin: Site
The lamella clarifier separates sedimentable suspended solids from liquids for the treatment of process wastewater. Compared with the traditional sedimentation tank, the lamella clarifier occupies a smaller area and settles suspended solids faster and easier in a given time.
The sedimentation performance depends on the effective sedimentation area and is independent of the sedimentation depth. Lamella plates are installed inside the tank as a module. The effective sedimentation area of lamella clarifier is the accumulation of the projected area of the lamella plates not the occupied area.
1. Small spacing between lamella plates
The spacing between lamella plates has been greatly reduced to 80mm, thereby greatly improving the utilization rate of sedimentation.
2. Good sedimentation effect
Due to the small Reynolds number, it can effectively restrain and suppress hydraulic pulsation, thereby greatly reducing the negative impact of the disturbance of the water flow details on the settlement of alum flowers.
3. Uniform water distribution
The water distribution inside the lamella clarifier is uniform, and there will be no short flow phenomenon.
4. Increased sedimentation sludge load
The sludge area of the lamella plate filler is equal to the sludge discharge area, and the sludge discharge area is more than 4 times that of the ordinary inclined plate, which greatly increases the sedimentation sludge load.
5. Not easily deformed
Due to the structural characteristics of the lamella clarifier and lamella plates material inside, it has a stiffness that ordinary inclined plate cannot match, and is not easily deformed under heavy loads.
The lamella clarifier is based on the shallow layer theory:
A set of lamella plates with a certain slope are installed in the lamella clarifier. The spacing between these lamella plates is small, and the water flow forms laminar flow between them. This design is equivalent to dividing a large sedimentation tank into many shallow and small sedimentation units.
When the treated water flows from the bottom to the top of the lamella plates, suspended solids in the water begin to settle under the action of gravity. Due to the special design of the lamella plates, the layers of the lamella clarifier will not interfere with each other, which is beneficial for the settling of suspended solids.
At the same time, the spacing between the lamella plates is small, which prevents the suspended solids from experiencing excessive resistance during the settling process, further increasing the settling speed.
When suspended solids touch the surface of the lamella plates, they will slide along the surface of the lamella plates and gather in the sludge collection area. At the same time, clear water flows out from the gaps between the lamella plates to the top of the lamella clarifier.
As the sludge gradually accumulates, it needs to be discharged from the lamella clarifier through the sludge discharge outlet to maintain the normal operation of the lamella clarifier. The discharged sludge can be further concentrated, dehydrated, and treated to achieve resource utilization or harmless disposal.
The lamella clarifier achieves efficient solid-liquid separation through its unique structure and design, effectively solving water-related environmental issues.
1. Water pollution
Water bodies are affected by human activities, resulting in deterioration of their sensory, physical properties, chemical composition, biological composition, and sediment conditions. Water pollution reduces the value of water use, poses a threat to aquatic organisms and water users, and exacerbates the contradiction of water scarcity.
2. Shrinkage and degradation of rivers and lakes
Due to the development of human society, the use of water for industry, agriculture, and daily life continues to increase, and the development of water resources continues to intensify, resulting in the interruption of some rivers and the shrinkage and degradation of rivers and lakes in some plain areas. This not only affects the natural circulation of water bodies, but also disrupts the balance of aquatic ecosystems.
3. Groundwater overexploitation
Due to the scarcity of surface water resources and intensified water pollution, some regions engage in predatory development of groundwater, resulting in a continuous decline in groundwater levels. This not only affects the sustainable use of groundwater, but may also trigger geological disasters such as ground subsidence.
4. Soil erosion
Under the influence of external factors such as hydraulic, wind, earthquake, and land reclamation, water and soil resources and land productivity are damaged and lost. Soil erosion leads to the destruction of land resources, nutrient loss of cultivated land, reduction of agricultural cultivation area, and may trigger disasters such as flash floods and mudslides.
5. Heavy metal pollution and organic pollution
Some industrial wastewater contains toxic and harmful heavy metals and organic synthetic pollutants, which are difficult to degrade and pose a serious threat to aquatic organisms and human health.
Lamella clarifiers are widely used in various water treatment scenarios, including but not limited to sewage treatment plants, domestic wastewater, water treatment plants, etc. To some extent, it can solve water related environmental problems.
