Mill Farm – three years in operation already

Revisit to Mill Farm

Wood recycling plant already three years in operation

In April 2019 CRJ Services, in partnership with HAAS Recycling Systems GmbH, commissioned a full turn-key wood recycling plant at Mill Farm Recycling. After three years of successful operation, CRJ return to speak with Will Ainsworth – Partner at Mill Farm Recycling to see how the plant has been performing.

Following several years of processing their biomass products with a series of mobile shredders and screeners, Mill Farm required a static wood recycling plant that could accommodate their increased processing volumes and deliver an improved product in a range of specifications.

In collaboration with CRJ Services, we designed and installed a customised static wood recycling plant. The already pre-shredded material is reduced to the required grain size with the vertical hammermill, ARTHOS 1600-E. Magnetic and non-ferrous separators sort ferrous and non-ferrous metals from the material flow. Finally, the recycling chips are screened into four different grain sizes using a HAAS flat screen.

The useful fractions are distributed to six large storage bays by means of chain conveyors. The oversize is fed back into the process. An extraction system to minimise dust emissions completes the HAAS solution.

The required grain size can be varied as desired with a minimum of time. The screen basket of the hammermill can be changed in less than 30 minutes. This allows the chip size of the material to be specified. The screen decks in the flat screen can be easily replaced individually and thus offer the greatest possible flexibility.

Commissioned in April 2019, the plant has now been successfully operating for three years. We took this opportunity to visit Will Ainsworth – Partner at Mill Farm Recycling to get his thoughts on the performance of the plant and discuss how this has improved their operation.

“The plant has performed well with good throughput. The plant is delivering 120% increase in production compared to our mobile setup. Our mobile plant required to be blown down and fuelled up daily which doesn’t sound like a big issue, but it can sometimes take well over an hour every day out of your production time, we currently blow down our plant once a week which takes approximately a couple of hours.”

With their mobile setup, producing different product specs involved the exchange of trommel drums and screening baskets within their screeners and shredders.

Will stated, “The access to the hammermill hammers and screen is very quick and easy. Changing screens within the flat screen takes less than 5 minutes to change each section, and we are able to create our 3 product sizes and still screen for oversize at the same time.”

One of the defining features of the new plant is the longevity of the wear parts, and ease of maintenance.

“The part we have changed the most frequent is the dust seals around the chip screen which we change approx. every 9 months. Apart from that the plant is fairly low maintenance with the only other wear parts changed to date being 1 full set of hammers and a row of 5 milling plates for the hammer mill. We bought a quantity of parts when we purchased the plant, this has meant that we have most of the required parts on the floor ready which has reduced downtime to a minimum.”

The HAAS plant also includes a dust extraction system which removes dust from various sections of the plant.

“The dust extraction system reduces the dust around the plant and building to a minimum which is great for not only the working conditions but fire safety too.”

Will Ainsworth, Partner bei Mill Farm Recycling