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• New drying plant for Anglia Lime

8th August 2012 - Based in Sudbury, Suffolk, Anglia Lime Company has, since 1992, pioneered the use of lime in East Anglia through training courses and the distribution of lime materials. Over this period the company has seen an increase in the awareness and the use of lime in both restoring old buildings and developing new builds.

These developments have led to the development of lime-based products and systems that make the use of lime more efficient and convenient, while retaining the beneficial properties of lime.

Combining abundant East Anglian local sands with hydraulic lime base binders, Anglia Lime Company offers a sustainable lime-based solution for plaster repairs, repointing brickwork, installing a lime floor or even a pre-coloured, spray applied finish for the most modern of buildings.

A growing market and increased demand has recently seen the company invest in a new drying plant with the dryer and bag filter being supplied by BG Europa (UK) Ltd of Wickhambrook, Suffolk.

Drawing upon long standing experience within the low temperature drying sector BG Europa have supplied their SD 0.8 Parallel Flow Dryer and SFC Pulse Jet Bag House. This combination offers a low capacity, versatile and cost effective package for the drying of various sands, glass and mineral products.

Parallel Flow Dryer

Nominally rated at two tonnes continuous feed per hour with 5% moisture removal the dryer support base frame incorporates a hinge arrangement to allow the drum inclination to be adjusted between 0.5º and 3.0º to suit material specifications (factory set at 1.0º).

Manufactured by BG Europa from 6mm thick 50D boiler plate steel the drum shell is finished with one coat of heat resistant paint and fitted with a set of bolt-in and replaceable flights manufactured from 5mm thick EN8 steel. The dryer airplate incorporates an integral feed chute fitted with bolt in replaceable liner plates. The hinged design of the airplate, which incorporates the burner mountings, allows easy access for servicing.

Completing the specification a thermocouple is fitted within the discharge chute to measure the temperature of the dried material. Additionally, a second thermocouple is also mounted in the exhaust stack base to measure the temperature of the dryer exhaust gases and provide alternative dryer temperature control.

Pulse Jet Fabric Filter.

Ideally suited to low temperature drying applications the SFC Pulse Jet Filter incorporates an efficient cleaning mechanism which does not cool the incoming dryer exhaust gases.

With all the dryer exhaust gases filtered through the SFC 20 compact pulse jet fabric filter unit,   twenty factory installed Nomex type (500 mg/m²) filter bags provide a total cloth area of 9.0m². A snap ring collar secures the bags into the plenum plate providing an air tight seal and an easy method of replacement. With an electronic pulse controller allowing fine adjustment of the cleaning pulse duration and frequency to suit operating conditions, an invertor controlled direct drive filter exhaust fan installed on the clean air side of the filter allows adjustment of the air flow within the dryer drum to suit the drying process.

Controls and Commissioning

Mounted on the dryer base frame a compact control panel contains the fan motor starter and inverter speed controls, drum drive motor starter and inverter speed control, temperature controller, over temperature protection system, under temperature alarm system, temperature displays, stop/start buttons and emergency stop system.

Prior to delivery the dryer and filter package was fully wired within the workshop and tested prior to despatch to Anglia Lime. Successfully installed in the allotted time frame the new dryer and bag filter was fully commissioned by BG Europa engineers and integrated with the feed and controls and the bagging system by the Anglia Lime team.

Philip Poels – Director, commented, “BG’s delivery of the plant on schedule was not compromised by their impressive flexibility of design in accommodating our specific requirements.”

Long Standing Experience

BG Europa (UK) Ltd have provided specialist drying plants for many industries, including dryers for aggregates, sand, slag, mineral, glass and recovered aluminium. Dryer drums are designed specifically for each application in either counter-flow or parallel design depending on the process requirements. SD Series Parallel Flow Dryer Drums are mated to SF Series Pulse Jet Fabric Filters to provide efficient low temperature drying at just above dew point.

These drums are used extensively within the slag and sand drying industries and therefore flight design and drum construction is targeted to provide long operational life given the highly abrasive nature of these materials. A full turnkey package is available including feed bins, conveyors, fabric filters, storage silos and all controls. Alternatively a dryer can be incorporated within an existing production set up to enhance production capacities and flexibility.