Lamella Clarifier

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Lamella Clarifier

Unlike the ordinary clarifier, the Lamella clarifier improves the settling area using its unique water distribution method and plate structure. No matter the surface loading or the service life, both are several times that of ordinary clarifiers. Lamella clarifier has occupied a place in the solid-liquid classification section of sewage treatment with its excellent performance and is chosen by several users instead of ordinary clarifiers because of its high efficiency and compact structure.

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Product Advantages

We have an excellent technical team, which can be designed according to customers requirements.

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The surface load is 2-4 times that of the traditional clarifier.

Unique water distribution structure. Re-flocculation of sediment of lamella plate.

Customized inclined plate material and spacing to adapt to more working conditions.

Stable inclined plate structure, no collapse, simple maintenance.

Realizing online backwashing and regularly cleaning the sludge on the inclined plates.

Equipped with mud scraper to solve the problem of poor sludge discharge at the bottom.

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What is a lamella clarifier ?

Lamella Clarifier arranges a set of inclined plates in the sedimentation tank to cause the sludge in the wastewater to separate from each other on the shallow partitions. According to the different directions of fluid-solid movement, it can be divided into co-current flow, lateral flow, and counter-current flow. plate.

In the co-current flow, the muddy water passes through the inclined plate from top to bottom. In the lateral flow, the muddy water passes through the side of the inclined plate. The common advection lamella clarifier is the common pool type. In the counter-current flow, the muddy water passes through the inclined plate from bottom to top.

The construction principle of the tank is shallow sedimentation. That is, when the ideal sedimentation tank processes the same amount of water, the larger the sedimentation contact area, the higher the working efficiency of the sedimentation tank, and at the same time, the transformation of the water flow from turbulent flow to laminar flow is achieved. As the inclination angle of the inclined plate increases, the risk of particle clogging also increases. Currently, the ideal angle of the inclined plate is 60°. A series of inclined plate modification plans have emerged to save costs, such as V-shaped inclined plates, labyrinth inclined plates, Mechanical coagulation tanks, etc.

Taking into account the subsequent maintenance issues of the inclined plate, the later management costs can be reduced by studying the influence of the inclined plate's shape on the sedimentation tank's removal rate.

The difference between Lamella Sedimentation Tank and Inclined Plate Sedimentation Tank.

The Lamella settler and the Inclined Plate Settler are common wastewater treatment equipment with some differences in solid-liquid separation:

1. Structure and Principle:
Lamella Settler: The Lamella settler utilizes a large number of inclined plates arranged to form an inclined plate assembly. Wastewater flows between the plates, allowing solid particles to settle on the plates. The extended settling path and increased effective settling area of the plate assembly accelerate the settling rate of solids.

Inclined Plate Settler: The Inclined Plate Settler also employs sloped plates where wastewater flows over the plates and solid particles settle on them. The key distinction is that Inclined Plate Settlers generally have parallel sloped plates, while Lamella settlers have a larger number of staggered inclined plates.

2. Settling Efficiency:
Lamella Settler: Due to the more numerous and denser arrangement of inclined plates in Lamella settlers, they offer a larger effective settling area and longer settling path. As a result, they can enhance the settling velocity and efficiency of solid particles.

Inclined Plate Settler: With fewer sloped plates, Inclined Plate Settlers may have slightly lower settling efficiency compared to Lamella settlers. However, they can still effectively accelerate solid particle settling and solid-liquid separation.

3. Applicability:
The suitability of each type depends on water quality, treatment capacity, and process requirements. Generally, Lamella settlers are suitable for applications requiring high-efficiency settling and more stringent solid-liquid separation demands, while Inclined Plate Settlers are suitable for general solid-liquid separation processes.

In conclusion, Lamella settlers and Inclined Plate Settlers exhibit variances in structure, settling efficiency, and applicability range. The choice between the two can be based on specific wastewater treatment process requirements.

In which stage of sewage treatment is lamella clarifier used ?

The Lamella sedimentation tank is commonly used in the solid-liquid separation stage of sewage treatment processes, primarily for enhancing the settling velocity of solid particles and removing suspended solids in wastewater, thereby improving water purification and treatment efficiency. Specifically, the application segments of the Lamella sedimentation tank in sewage treatment include the following aspects:

1. Grit tank: The application of a sedimentation tank in the grit tank can remove inorganic impurities in the water.

2. Primary sedimentation tank: The use of a sedimentation tank in the primary sedimentation tank can remove suspended solids and other solid matter with a density greater than one in the water.

3. Secondary sedimentation tank: The application of a sedimentation tank in the secondary sedimentation tank can remove activated sludge from the biological treatment effluent.

4. Improve biological treatment efficiency: Dissolved air flotation treatment can reduce suspended pollutants and colloidal substances in the water, provide better water quality for subsequent biological treatment units, improve biological treatment efficiency, and reduce treatment difficulty.

The Lamella sedimentation tank is primarily employed in the solid-liquid separation stage of sewage treatment systems, including primary solid-liquid separation, intermediate treatment, removal of fine particles, among other aspects, aiming to improve water purification effects and treatment efficiency.

What is shallow pond theory ？

In the ideal state, the inclined plate sedimentation tank's length is L, the tank's depth is H, the horizontal flow velocity in the tank is v, and the particle settling velocity is u0. It can be seen that when L and v values remain constant, the shallower the tank is, the smaller the suspended particles that can be removed. By using horizontal baffles to divide H into n layers, each layer has a depth of H/n. With u0 and v remaining constant, only L/n is needed to remove particles with settling velocity u0, thereby reducing the total volume to 1/n of the original volume. Similarly, suppose L remains constant, and the tank depth is reduced to H/n. In that case, the horizontal flow velocity can be increased to nv while still removing particles with settling velocity u0, thereby increasing the processing capacity by n. This is the shallow tank theory proposed by Hazen.

Why is the shallow pond theory particularly important in the design of sedimentation tanks ?

The shallow pond theory is particularly important in the design of sedimentation tanks for several reasons:

Simplifying complex problems: Sedimentation tanks typically have a large surface area but relatively small depth. Applying the shallow pond theory allows the water flow within the sedimentation tank to be considered as horizontal flow, greatly simplifying the calculation of fluid dynamics and making the design and analysis more straightforward and effective.

Understanding the sedimentation process: The primary function of a sedimentation tank is to slow down and allow suspended particles to settle to the bottom for solid-liquid separation. The shallow pond theory helps engineers better understand the flow and settling processes of wastewater in the sedimentation tank, providing a basis for design.

Improving design efficiency: The shallow pond theory enables engineers to predict sedimentation efficiency more accurately and consider factors such as mixing of wastewater and settling velocities in the design process. By optimizing the shape and angle of inclined plates and adjusting parameters such as flow velocity, the performance and efficiency of the sedimentation tank can be enhanced.

Cost savings: By applying the shallow pond theory, engineers can design the structure and layout of sedimentation tanks more effectively to improve wastewater treatment efficiency, reduce treatment costs, and simplify maintenance complexity and costs.

In conclusion, the importance of the shallow pond theory in the design of sedimentation tanks lies in its ability to simplify complex problems, aid in understanding the sedimentation process, improve design efficiency, and save costs, enabling engineers to design high-performance sedimentation tank systems more effectively.

What are the important components of lamella clarifier?

Tank structure: This includes the design shape, dimensions, and material of the tank. Lamella sedimentation tanks are typically rectangular or circular in structure, with specific length, width, and depth to meet the needs of water treatment processes.

Inlet: Used to introduce the untreated wastewater or sewage into the sedimentation tank. The inlet is usually located on one side of the tank and is designed to ensure uniform distribution of water flow within the tank.

Outlet: Used to discharge the treated water from the sedimentation tank. The outlet is typically located on the opposite side of the tank to ensure that the clarified water can be discharged smoothly after the sedimentation process.

Horizontal baffles or partition layers: Used to divide the depth of the tank into multiple horizontal layers to increase settling efficiency and enhance treatment effectiveness.

Mixing device (optional): Some Lamella sedimentation tanks may be equipped with mixing devices to aid in the settling of suspended particles and maintain uniform water flow.

Sludge collection device: Used to collect and remove settled sludge or suspended solids to ensure clean water quality within the tank.

Layered discharge ports: If the tank is designed for layered sedimentation, there may be layered discharge ports at different depths for separately discharging water from different depths.

These are some of the important components of a Lamella sedimentation tank, and the specific composition may vary based on actual processes and design requirements.

How does lamella clarifier work?

The flocculated water flowing into the lamella clarifier is totally distributed to the bottom of the tank through the distribution unit and the flow rate drops rapidly and changes from advection to slow rise. After the slowly rising sewage "touches" the inclined plate, the suspended solids in the sewage are "cut off" by the inclined plate. The rising sewage makes the sludge cut off by the inclined plate more and more, and the proportion becomes larger, and then it sinks into the sludge pit, and the sludge in the sludge pit is scraped by the scraper to the sludge outlet for discharge.

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Manufacturing capabilities and experience

1、We have a R&D and production team of more than 30 people and a production workshop of more than 3,000㎡.

2、Adopt flexible manufacturing technology，Provide customized solutions in <8 hours. The use of computer-aided design (CAD), computer-aided manufacturing (CAM), and digital control systems can improve production efficiency and reduce human errors.

3、Advanced sewage treatment equipment production equipment, including laser cutters, bending machines, assembly equipment, and coating equipment.

4、Strict quality management system and quality control process ensure the manufacturing and delivery of high-quality products.
5、Adopting modular design and production methods makes the product easier to assemble and install, while reducing transportation costs and on-site construction time.

6、Products are exported to more than 30 countries and regions, and the mature foreign trade service team provides 7*24 hours pre-sales and after-sales services.

Our equipment customization process

We have an excellent pre-sales and after-sales service team to ensure that customer problems are solved as soon as possible.

1.Technical Support

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Based on technical data, such as water analysis, material, size, electric control, which buyers provide, Yosun can help to select the exact model and is able to design the drawings, as well as technical specifications, including but not limited to layout plan, civil condition, 3D diagram, electric circuit drawing, selection of material and power, and construction requirements.

2.Contract Signing

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Technical specification confirmed well, the two parties should negotiate on price, payment terms, way of transportation and date of delivery etc.

3.Contract Execution

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Depth design of machines and detailing drawings: preparing production drawing, BOM, electric drawing etc.

Making production schedule: standardizing production according to timeline specifications

Proceeding inspection: incoming inspection, in-process inspection and final inspection as per ISO standard.

Completion: Issuing ITP and product certificate

Delivery: informing the buyer to prepare for receiving the goods in advance and assisting to packing the good etc.

4.Post-Sale

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After receiving the goods, Yosun is responsible for guiding installation and debugging.

Providing operation manuals, maintenance plans, and long-term after-sales service.

Long term supply of spare parts.

OUR LAMELLA CLARIFIER GALLERY

Lamella Clarifier Application Fields

Municipal Wastewater Treatment

Removal of suspended solids and other sediments from domestic sewage
Industrial Wastewater Treatment

Industrial wastewater treatment in papermaking, mining, metal processing, chemical industry, textile, etc.
Drinking Water Treatment

Used in natural or artificial water purification process to remove solid impurities and improve water quality
Agriculture

Remove suspended matter from irrigation water, reducing wear and clogging of irrigation equipment
Food and Beverage Industry

Treatment of wastewater generated during production
Oil and petrochemical industry

For separation and recovery of oils and other chemicals
Power and Energy Industry

The use of sedimentation tanks helps reduce pollution and recover valuable materials.
Mineral processing industry

Sedimentation tanks are used to separate and recover valuable components from ores, such as gold, silver, copper, etc.
Aquaculture

Remove organic matter and suspended solids from fish ponds or aquaculture environments to improve water quality
Stormwater Management and Surface Runoff Treatment

Removes suspended solids and other pollutants contained in storm water.