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LAMELLAR SETTLER

The function of the lamellar settler is to remove suspended semi-heavy and heavy particles (grit, clay and lime) from the water. These elements hinder subsequent treatment by producing deposits in hydraulic conduits, piping and channels and causing abrasion to pump impellers and equipment etc.

Lamellar settlers are designed for the continuous separation of sediments from water and they have two basic purposes: to increase the settling area and to obtain a laminar flow.

The concept of the lamellar settler is based on the fact that the surface load (m /m /day) of a freefall settling tank does not depend on its depth. It is therefore possible to increase the capacity of a settling tank by dividing it, thereby creating a number of "settling tanks", or by using plates inclined at a certain angle.

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© Toro Equipment 2009 LAMELLAR SETTLER

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DESCRIPTION OF THE EQUIPMENT

The lamellar settler is an open rectangular GRP tank divided into three main chambers:

· Inlet chamber.

The influent flows directly into this chamber before going to the settling stage.

· Settling chamber.

The lamellar packs, made up of several GRP plates, are located in the settling chamber. The packs are arranged in parallel with an inclination angle of 60º to enable a larger settling area for the decantation of suspended solids.

· Outlet chamber.

The clean and clarified water is sent to this chamber for direct evacuation.

© Toro Equipment 2009 LAMELLAR SETTLER

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DESCRIPTION OF PROCESS

The influent is fed through a connection pipe to the settling chamber. Slots in the pipes located on the lower part of the lamellae allow uniform feeding of the liquid to the lamellar packs.

As the inflow passes between the plates, the solid particles slide along the inclines of the lamellae towards the bottom of the tank, while the clean water rises to the surface of the settler.

The lamellar system means that the distance travelled by a particle before settling is less than in a conventional settling tank, thereby increasing clarification capacity. A pneumatic valve at the bottom of the tank enables the settled solids to be discharged in accordance with needs.

The clean clarified water in the upper part of the settling tank falls to a collection weir located along the length of the settling chamber. From this weir, it goes to the outlet chamber to be evacuated by means of a pipeline.

© Toro Equipment 2009 LAMELLAR SETTLER

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TECHNICAL SPECIFICATIONS

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Model N ominal flow rate (m3 /h) Dimensions Maximum width A (mm) Maximum height B (mm) Length L (mm) R equired space (m) Material Rising velocity Vs (m/h)

DCL-2 2

DCL-5 5

DCL-10 10

DCL-15 15

DCL-20 20

DCL-40 40

795 1,3 2,12 3.5×2 G.R.P. 0.8

1,885 2,525 2,33 3.7×3 G.R.P. 0.8

1,805 2,525 3,36 4.7×3 G.R.P. 0.8

1,885 2,525 4,67 6×3 G.R.P. 0.8

1,845 2,525 5,9 7×3 G.R.P. 0.8

2,546 2,525 7,2 8.5×4 G.R.P. 0.8

APPLICATIONS

The lamellar settler has applications in industries using materials that can be easily decanted and in potabilisation processes. · · · · · Potabilisation plants. Water reuse. Mining industry. Construction materials industry. Industrial applications.

© Toro Equipment 2009 LAMELLAR SETTLER

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