Author Archives: bennettma

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We have not just been involved with grain or onion drying down the years but have also had experience in designing and building a wood drying kiln as well as drying herbs.  Projects such as these have energy efficiency as their focus utilising insulation, heat recirculation, heat exchangers and high efficiency gas burners as well as looking at alternative energy sources.

With the growth in the number of Anaerobic Digestion (AD) projects there is an increasing need for drying the digestate from the AD plant for use either as a source of fertiliser or fuel for biomass heating.  The dried solid matter is easier to transport to where it is needed and this also utilises the heat from the AD plant.  We can offer digestate driers and allied conveying and processing equipment such as pelleters.

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With buildings in the yard at Park Farm becoming homes for a number of different businesses, it was necessary for Tharros Ltd to build another grain store at the “farm” end of the site.  It was decided to build a 2000 tonne on floor bulk grain store with a Pellcroft central steel main air duct and Challow timber drying floor.

There was a need to take into account the varying crop types and quantities so a doorway was included in the rear gable of the building and a movable wooden panel crop divider to allow one side to be divided either half and half or one third and two thirds.

Nearby there are residential properties which required the large axial fan unit to be silenced by building a concrete block fan house consisting of insulated cavity walls and insulation lining in the roof.  A box splitter attenuator was installed on the intake to reduce the noise to the required level.

The project also gave the opportunity to install a large new electrical supply and remove overhead cables across the yard.

2000tonne on floor grain store

 

 

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When Harvest Installations produced their Constant Humidity Controller modulating gas burner (or the CHC as it is generally known) over 30 years ago, it brought about a revolution in near ambient drying of grain in bulk on-floor stores.  The advent of the humidistat some years earlier, although taking the work out of manually switching drying fans on and off, did not allow grain to be dried 24/7.

Harvest Installations Constant Humidity Controller on Lister MEU engine driven fan

Setting the CHC to a target relative humidity related to its equilibrium moisture content of the crop being dried allows drying to commence as soon as sufficient crop is in the store.  This then enables the drying to be completed before wetter and cooler weather sets in, meaning that savings in electricity costs are realised, more than off-setting the cost of the gas.

The CHC has a proven record of accuracy, efficiency and economy with thousands of units in use on all combinable crops and in many onion stores too.  (Mike Bennett has been supplying CHCs since their earliest days).  A range of models are offered to match your particular farm’s output and configuration using Harvest’s own designed and manufactured plate-type burner head, giving maximum output in a compact design, combined with highly efficient use of fuel.  http://www.harvestinstallations.co.uk

We recommend the CHC based on nearly 30 years of supplying and servicing them.  Drying without a CHC can mean running those fans until almost Christmas.  Using a non-modulatory burner/heater can mean the problem of overdrying at the bottom of the stack and a crust forming on the top.  Whatever problems you have drying in your grain store give Mike a call.  He would be pleased to help and advise.

Harvest Installations Constant Humidity Controller on conventional on floor drying grain store

Harvest Installations Constant Humidity Controller on conventional on floor drying grain store

 

 

Harvest Installations Constant Humidity Controller on 1000tonne onion store

Harvest Installations Constant Humidity Controller on 1000tonne onion store

 

 

 

 

 

 

 

 

 

 

 

Harvest Installations Constant Humidity Controller double unit being installed

Harvest Installations Constant Humidity Controller double unit being installed

 

 

Harvest Constant Humidity Controller 200D

Harvest Constant Humidity Controller 200D

 

 

 

 

 

 

 

 

 

 

 

 

 

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We are finding increasing interest in complete farmyard developments.  This includes not only grain storage but also workshops, spray stores, fertiliser and machinery storage as well as PV roof panels and rainwater harvesting.  We can offer to design and project manage your whole development from initial brief to completion.

If such a development is to be undertaken it is usually important to look at the whole development for planning purposes.  However, bolt holes can be drilled in building stanchions to take steelwork for later lean-tos or extensions.

 

2500tonne refrigerated potato box store

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Mike Bennett’s association with Perry of Oakley goes back well over 25 years and during that time he has installed several Perry driers and a good deal of handling equipment.

Perry’s decision to locate a research and development drier at a fully year round commercially operated plant mean they can remain at the forefront of drier development.  This has also allowed them to develop and introduce the new Centrikleen dust extraction system that can be fitted to drier exhaust fans (not only on Perry driers too) to remove and collect 95% of visible dust and chaff.  It does not have any moving parts or additional electric motors.  http://www.perryofoakley.co.uk/centrikleen

In addition, Perry of Oakley has also developed and introduced a Light Grain and Chaff Recovery system – a pneumatically operated system installed at the base of the exhaust plenum. This system removes the need to clean out light grains and chaff from the drier exhaust plenum.  http://www.perryofoakley/?q=light-grain-chaff-recovery-system-lgcrs

 

Perry drier under construction

Perry drier under construction

Perry 2m wide drier squeezed into a small place

Perry 2m wide drier squeezed into a small place

 

Perry 30tph drier with 60tph trench intake

Perry 30tph drier with 60tph trench intake

 

 

 

 

 

 

 

 

 

 

 

 

Double column Perry drier

Double column Perry drier

 

 

 

 

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In 2017 CIPC distribution in potato stores will become even more critical with the change in label requirements for its use.  It will be a requirement for “active” ventilation and this will mean it is important that fans should be speed controlled. However box stores will benefit from the use of a timber suction wall where the slots are correctly sized to give the airflow for good CIPC distribution and to match the boxes.  Bennett & Co can advise on any improvements to stores that may be necessary, whethSuction wall under constructioner CIPC distribution or problems with ventilation, control or condensation.

 

 

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One of Bennett and Co’s major projects in 2015 has been to complete a new grain store at Brook Farm Catworth.  Mike Bennett has had long experience with Harvest Installation’s stirrers having put the first one into a Norfolk grain store nearly 25 years ago.  It is now a tried and tested technique and Mike finds most clients discuss the possibility of a stirrer when building a new grain store.  He has been supplying its allied product, the Constant Humidity Controller, since the late 80’s.

In fact, he would recommend a CHC for any on floor bulk drying of grain with or without a stirrer.  The product has been around a long while and been regularly updated and improved.  Without it you are unable to dry continuously 24 hours a day and drying can extend well towards Christmas as the days with good conditions become less.

However when drying at high temperatures with a stirrer it is possible to switch CHC, stirrer and fans off at night and conserve energy and not disturb the neighbours!

 

Harvest Installations Maxistirrer

2000tonne stirrer drying store with Harvest Installations maxistirrer

 

 

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It is now some 20 plus years since Bennett and Co’s Mike Bennett sold and installed his first Harvest Installations Maxi stirrer system, the first into Norfolk.  Stirring to aid bulk drying of grain is now a standard means of speeding up and enabling efficient drying in on-floor stores to greater storage depths.

A 1000 tonne silo with stirrer drying offers efficient and cost effective drying and storing and we can supply a complete system including loading and unloading equipment.

Bennett and Co have seen increased interest in grain stirring with projects involving both on floor stirrers and silo stirrers.  We continue to work with Harvest Installations installing both Maxi stirrers and Constant Humidity Controller burners that have been continuously updated and improved over the intervening years.  http://www.harvestinstallations.co.uk

 

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The increased size of many projects mean that planning applications may be determined under major development rules taking thirteen weeks rather than eight weeks.  Bennett and Co advise clients to get started early in looking at these projects.

Whether it’s new ‘green field’  sites or improvement of existing facilities, Bennett & Co are capable of dealing with detailed planning issues with local authorities, environmental and safety problems associated with demolition, designing solutions to alleviate potential noise nuisance, piling and complex foundations, as well as designing for drying and storing the crop to the client’s brief and providing health and safety planning within the Construction Design and Management Regulations 2015.

Bennett & Co work with a number of specially selected subcontractors to produce high quality outcomes using market leading suppliers of steel frame buildings, silos, continuous flow grain driers, bulk handling equipment, grain cleaning and processing equipment, fans, modulating burners, grain stirrers, timber tunnels and drying floors and state of the art control and monitoring equipment.

 

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The increasing number of growers with potato stores spread over a wide area increases the need for remote monitoring. This can be as simple as a GSM auto dialler providing text messages giving warning of problems in the store or full computer monitoring and control.  Bennett and Co offer control systems to meet any client need.

A large number of insulated motorised louvres have been supplied fitted into stores being up rated.  For quality and purpose we have chosen Farm Electronics louvres.

In addition to this we are able to supply PV solar panel arrays for barn roofs and for powering control equipment in remote locations.