OAS AG Case Study: Our modular silo plant to increase your silo and dosing capacities

OAS AG Case Study: Our modular silo plant to increase your silo and dosing capacities

OAS AG (Germany) - PIn addition to the new development of production lines, our scope of performances for plant engineering ranges from the expansion and modernisation of plants to proven solutions and products for new and recurrent tasks. Here, we are developing individually tailored plant engineering solutions in close cooperation with our customers and the engineering experts at OAS to fit our customers' requirements.

To date our modular silo plant has been successfully installed at many of our customers working in the bulk material industry and the paints, lacquers, and varnish industry. It always serves an increase of the storage and dosing capacities in silos.

Population growth and the associated increased demand for housing, requires higher and faster provision of building materials for the construction of housing. The components required to this end are delivered by the bulk material industry, the paints, lacquers, and varnish industry, or the chemical industry. These are branches of industry where we prove decades of experience in plant engineering and where we have realised a multitude of successful projects already.

What is bulk material?

Powdery, granular, or lumpy batches, which can be transferred by pouring (often they are non-countable) are called bulk materials. This can be e.g. particles, sand, ores, grain, gravel, or cement. Bulk material is characterised particularly by its particle size (or particle size distribution) as well as by its bulk density per volume unit.

Modular silo plants are used to store and dose such bulk material.

When we hear bulk material, we first think about the construction and chemical industries. But bulk material is also used in the production of animal food as well as the food industry and the pharmaceutical industry.

Requirements for a modular silo plant:

The main requirements for a modular silo plant, which we tailor to our customer's requests, are:

  • storage and dosing of bulk material in a plant
  • increase of the storage capacities
  • simple connection to the existing production
  • possible extension beyond the production shed  
  • short assembly time along with low intervention in the existing production
  • expandable construction ranging from 2 to 10 silo chambers

Design and advantages of our modular silo plant:

The modular silo plant is installed on a surface area of approx. 10 x 10 m. The plant has a honeycomb structure. In the centre – the inner zone – there is a double-chamber silo, also called mother silo. The plant can be expanded by eight silos (ultimate configuration), which are arranged circularly around the so-called mother silo. This area is the outer zone of the plant.

  • Depending on the design, the ten silo chambers can house raw materials from 40 to 100 m³.
  • There results a high storage capacity in the smallest space. This ensures that the raw materials are available when required and are supplied automatically to ensure flexible and continuous production.
  • Thanks to the modular construction, the assembly time is reduced.
  • Small and large components can be stored above a line to be dosed and transported to the receiving container. In the large batch, small quantities can be transported with less loss. Furthermore, compared to conventional plants it is possible to do without the transportation cycle for small quantities, which also reduces the batch cycle time.

How exactly does this work?

The modular silo plant consists of round silos which converge in a funnel shape at the bottom so that the bulk material can easily flow out. Lorries deliver the bulk material and the latter is blown at a pressure of 1 to 2 bar into the silos where it is stored.

Conveyor screws or cellular wheel sluices arranged underneath the silos are used to transport the bulk material from the silos into electronic container scales located downstream of the mother silo.

Transportation is controlled with our process control system pronto. One after another, the bulk materials are transported into the scales as defined in a recipe. As soon as the required quantity is dosed into the scales, the process control system stops the discharge. When the recipe is complete, the contents of the container scales is drained into a pneumatic conveyor. From there, the weighed raw materials are conveyed through pipes and supplied into a receiving container for further processing.

There are different types of potential further processing:

  • supply to mixers,
  • supply to container scales (compilation of further recipes), or
  • supply to a packing machine.

With its sophisticated concept, the modular silo plant can also be used to build new linear plants.

Do we have sparked your interest? Do you also want to save working space and optimise your production? Feel free to contact us.

We are happy to be there for you!

For more information about this article from OAS AG click here.

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