Author Archives: zollt

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DENNIS2This Suffolk farmer had demolished his outdated square bin store and replaced it with a large floor store.  However, he was reluctant to take up floor space with batch drying on the floor with a stirrer system which would reduce the overall capacity of the building.  Instead a silo stirrer system was chosen using the Harvest Installations Maxi-stirrer and Perry of Oakley handling equipment.

DENNIS6The 30ft. dia. Westeel silo is loaded via a 60tph mechanical intake that feeds the elevator and inclined conveyor.  The system can dry approximately 300 tonnes at a time.  Once dried the silo is emptied via a Hutchinson Powersweep silo unloader with drive for the sweep auger from the outside of the silo.  The grain is then taken up the elevator into a conveyor running down the centre of the building in the roof apex.  This in turn feeds a travelling cross conveyor that runs on rails suspended from the roof.

Harvest  Installations Maxi-stirrers provide rapid drying at depth.  The client’s own Simplex fan was used, baffled to reduce its output, with a 2 million BTU/hr Harvest Installations Constant Humidity Controller providing the high temperature low airflow regime required for the high rates of drying possible with stirrers.  These were placed in an especially designed fan house to meet the noise restrictions required close to the village.

 

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drierA Norfolk farming family had an Alvan Blanch drier that was nearing the end of its useful life.  The cleaner and handling equipment also needed uprating to cope with the larger tonnages and higher combine capacities.  At the heart of the new system is a new 20tph Alvan Blanch Double Flow Drier.  The drier was chosen because of its low visual and noise impact, vital in a beautiful part of the North Norfolk coast.  It fitted into the position of the old drier.  In fact the new dryer requires about the same power as the old one with twice the output.  It comes pre-assembled, pre-wired and pre-plumbed and coupled with the improved range of Perry handling equipment makes it easy to install.

Revamping a drying and cleaning plant into existing and traditional farm buildings require purpose built handling equipment that Perry provides.  A number of curved and inclined conveyor/elevator units were used, particularly the large combination machine that feeds the two new 30 tonne lorry loading bins.

drier3A Cimbria Delta sieve type cleaner/grader provides high quality samples of the large amount of malting barley grown, most of which is moved off the farm through the lorry loading bins. The cleaner provided the ideal solution enabling a high capacity machine to fit into a small space in the existing building.

Wheat is loaded into the existing barns either by overhead conveyor or the existing pneumatic conveying system that is also used to unload the stores to into the lorry loading bins.

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When the client acquired an additional farm there was a need for a centralised grain drying and storage facility.  In the rear of a general purpose building there was space for a drying plant including a floor area for wet grain storage.

dryerInitially a Perry mechanical intake pit was required, particularly as the fenland site has a high water table.  This is part of a combination conveyor/elevator unit that lifts the grain up to the drier intake conveyors.

The drier installed is a Svegma continuous mixed flow drier giving a capacity of 13tph.  As it has to fit within the building height, the unloading conveyor is set into the unloading hopper on the bottom of the drier.  This also is part of a similar combination to the intake machine providing a ninety-degree change of direction.

The output from the drier is cleaned in a Turner precleaner already owned by the client.  The output from the cleaner is lifted by a curved flight elevator to the conveyor to the storage buildings.  The curve allows the inclined section of the elevator to fit the pitch of the roof.

The storage buildings across the other side of the yard are reached by a Perry conveyor.  Another conveyor feeds the grain across the top of the doorways where it drops via removable ducting to the client’s telescopic elevator to load the store.

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storeThis organic grower produces a number of different cereal crops which necessitates the smaller amounts being stored separately.  An existing Norfolk barn with a precast concrete square bin system was uprated to dry and store all the client’s cereal crops.

The old Bentall dryer was removed with most of the existing handling equipment.  The new drying system consists of an 80tonne round open top Brice-Baker silo installed in place of the old dryer and has a drying floor and Harvest Installations Maxi-stirrer with 5hp fan and Harvest Installations Constant Humidity Controller.  This provides a batch dryer that keeps up with the smaller amounts of grain being harvested on this organic farm.  The large amounts of moist air given off in the high temperature fast drying stirrer system is extracted from above the silo, which also provides dust extraction when loading the silo.
store-2The store is loaded via a new mechanical intake pit and conveyor into a new Perry chain and flight elevator that feeds via a Perry aspirator cleaner onto a new Perry top conveyor. This is used to feed the drying, silo storage bins and lorry loading out of the far end of the building at 45tph.

store-4The storage bins have been hoppered with timber hoppers to make the emptying easier.  They are emptied via the existing belt conveyor and elevator, whose output drops down through the existing Turner cleaner (if required) into a new Perry bottom conveyor which passes under the drying silo back to the new input elevator and onto the top conveyor.  The drying silo is emptied through a sump under the drying floor into the bottom conveyor, the rack and pinion slide being controlled from outside the silo.  A sweep auger is lowered from the catwalk to remove the remaining grain.

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