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HEAT generated within pneumatic conveying systems causes a multitude of problems for heat sensitive products and, as a result, often rules out pneumatic conveying as a possible means of powder conveying between two or more destinations. To overcome this problem Fresco Systems Australasia has a range of three standard cooling coils capable of reducing conveying air up to 2000 cubic metres per hour down to five degrees Celsius. The coils have also been used to cool materials prior to downstream processing. This enables better temperature control, avoiding seasonal weather changes particularly in the baking and confectionery industries where products are stored in external bulk silos and subjected to vast temperature fluctuations. The cooling coils are housed in a specially designed housing pressure rated and certified to 100kPa working pressure. Designed to comply with the Australian standards for pressure equipment and pressure piping, the housing is fitted with internal baffles that deflect the air flow – providing even distribution over the entire coil while slowing the air for maximum cooling. The housing is manufactured from stainless steel and is finished to various standards to suit the industry. The coils can be either copper with aluminium fins or full stainless steel. Cooling mediums of glycol or chilled water can be used. Modulation valves enable online temperature changes via a PLC or similar processor using the temperature probe which constantly monitors the conveying air temperature. Optional filters with filtration efficiency down to EU10 can be fitted providing HEPA quality air within a single unit. The filters are easily inspected and changed via the side access door. The cooling coils suit both positive and vacuum pneumatic conveying systems and can be easily retrofitted to existing systems. |
