Radar measures dust to keep factory warm
January 1st 2008

A vibrating rod level switch was already in use for high and low level alarms. This had proved reliable, so it was decided to seek a continuous measurement solution from the same manufacturer.

During a site survey, the high levels of dust, filling and poor reflective properties of the material were taken into account. The customer expressed a preference for a non-contact measurement.

A level radar for solids, which handles dust, continuous filling and angles of repose was recommended.

It was also identified that the silo capacity information needed to be shared with production, disposal and the facilities departments across the site. The radar was teamed with a 'signal-conditioner', which can provide power to the device and distribute information over the computer network.

The solution provided was a VEGA Controls 2-wire solids radar connected to a signal conditioner with network connectivity built in. It provides real-time data across the network for all departments so they can anticipate and control needs.

The result is an efficient boiler system feed, with very low waste and optimised heat output all year round. William Ball manufactures fitted kitchens, bedrooms, bathrooms and furniture and combines quality craftsmanship with high tech manufacturing lines that cut and shape the furniture.

Asignificant amount of wood dust is created, which is collected via a pneumatic extraction system and collects in a central silo. The wood dust is used as a fuel for a newly installed high efficiency, low ash boiler system to provide both steam and heat for the entire plant.

An accurate reading of available 'fuel' capacity in the silo is critical to ensure the boiler system does not run out and that cooling fans are used efficiently for expelling any excess heat generated.

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