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Uzwil, Switzerland -- Large sieve surface areas are effecient! They are needed to separate sand and fine impurities while handling high throughputs, even in processing diffcult materials such as brewing malt. To produce top-class malt, the best approach is to apply the unsurpassed high-capacity cleaning technology from Buhler. This is evidenced by the recent example of the new Holland Malt facility. Holland Malt was recently set up as a joint venture between the Dutch beer brewer “Bavaria” and the agricultural cooperative “Agrifirm”.
The larger version of the Buhler PRIMUS high-capacity grain cleaner is equipped with some 30 square meters of sand sieve area. That is about ten times more than is offered by the Separator commonly used up to now. The PRIMUS is now being applied in the new Holland Malt malthouse, which is located in the Dutch Nort Niederlande grain belt on the North Sea. Holland Malt’s aim is to be a fast and reliable supplier of topclass malt. To achieve its goal, the company sought a system provider that was just as fast and reliable – and found it in Buhler. The ground for the plant was broken in March 2004, and the malthouse is scheduled to go into operation in early 2005. Four Buhler PRIMUS high-capacity grain cleaners of types 200/8 and 100/8 will then remove coarse as well as fine and low-density impurities from up to 600 metric tons of barley or 180 tons of malt per hour.
Dangerous dust
The purpose of thorough cleaning is not only to achieve top quality, but also to ensure safety. Dust is undesirable and dangerous – a small spark is enough to cause it to explode when dispersed in the air. Facilities such as Holland Malt must therefore present a safety analysis to the authorities to obtain an operating permit – and the specialists from Buhler have the expertise to provide it. Customers benefit in three respects: first, from the optimal support and advice offered; second, from a perfect end product resulting from a carefully planned production process; and finally, from the habitually efficient project implementation for which Buhler bears responsibility.
A cleaning wizard
Cleaned grain not only reduces the wear and tear on processing, conveying, and storage equipment, but also withstands extended storage periods better. State-of-the-art cleaning systems have always been a core competency of Buhler. Now a new feature has been added to this technology by integrating a horizontal air classifier as the first cleaning stage. In addition, the new PRIMUS also offers an unsurpassed cleaning capacity. Type 200/8 is capable of processing up to 200 metric tons per hour of grain, legumes, or oilseeds. The smaller PRIMUS type 100/8 has a throughput up to 100 tons per hour. In the Holland Malt facility, “Bavaria” helped to further fine-tune the machine’s performance. Not only brewer’s barley is processed by the cleaning wizard. The high-capacity cleaner also gives the finishing touches to the slightly sticky malt. The production lots cycle through the cleaning system several times – a new approach to processing and cleaning that will doubtlessly find other applications beside that in innovative breweries.
Saving time
PRIMUS saves time thanks to a system of material diverters. They allow materials of different particle sizes to be alternately processed without requiring any sieve changes. This is made possible by the different perforations of the preliminary and main screens, which can be selected using two diverters. The resulting quadruple combination for so-called two-variety operation is an important feature when it comes to using a single machine to alternately clean wheat, rye, oats, barley, corn (maize), soybeans, rice, or field beans. Efficient two-variety operation is possible at throughput rates as low as 25 metric tons per hour, depending on the specific degree of cleaning required. If very high throughput rates are needed as in the case of Holland Malt, several PRIMUS units are used. Holland Malt has installed four, using them not only for cleaning raw barley, but also for the final cleaning of the processed brewer’s barley ahead of steeping. And finally, the PRIMUS also cleans the finished malt. If grain is to be cleaned at throughput rates lower than 20 metric tons per hour, the tried and true solution is still to use the smaller Buhler Separator. (es)
Buhler is a global technology group and a system partner for the supply of plant, equipment, and process know-how in Food Processing, Chemical Process Engineering, and Die Casting, with some 6100 employees around the world.
For more information on the PRIMUS, please contact:
Mr. Hermann Hofer
Grain Handling Development Engineer
Buhler Group
Telephone: +41 71 955 29 82
Fax: +41 71 955 39 49
Email: hermann.hofer@buhlergroup.com
Web site: http://www.buhlergroup.com/
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