Cocoa bean cleaning
Cocoa beans are a natural product which, due to their origin, reach the processing plants with a large number of impurities. To meet the international food law requirements, a specific cleaning of the cocoa beans is required.
Since the cocoa beans are mainly delivered in jute or plastic sacks, which means that when the beans are fed into the plant, the strings from the sacks also get with the beans into the product stream. In the first cleaning step the strings are removed by air sifting.
In the subsequent processing step, coarse contaminants such as pieces of wood, pulp residue, leaves and very fine components such as sand or insect fragments are separated.
In addition to the above-mentioned impurities with a low specific gravity, impurities with a high specific gravity such as metals or stones can also be part of the product flow. Two further cleaning steps are therefore required.
Either magnetic separators or metal separators are used to remove ferritic or metallic foreign matter. In the final cleaning step, other contaminants with a high specific weight, such as stones, are removed by a heavy-particle separator
In the first step, the air sifter achieves efficient separation, especially of strings. In an integrated expansion room, light and heavy impurities are separated. This means, the aspiration system is only minimally affected.
Coarse and fine impurities are removed from the cocoa bean flow on a 2-layer sieve in the sieving machine. In an attached vertical air sifter, a separation between the cocoa beans and specifically light impurities takes place.
Ferritic parts are removed from the product flow with a magnetic separator. The cocoa beans are placed on the surface of a rotating drum that has a magnet mounted on the inside. Ferritic particles stick to the drum surface and are removed from the product flow.
The metal separator is used to separate ferritic and non-ferritic metals. Due to the change in an electromagnetic field, a detector detects the contamination in the product and activates a ejection unit.
Heavy particle separator
Specific heavy impurities are removed in the heavy particle separator on an inclined vibrating sieving table. In addition, an air flow is supplied to the underside of the vibrating screen by a fan. The table inclination and the air flow guarantee an optimal separation.
Cocoa bean cleaning systems CBCS
The cocoa bean cleaning systems are available with the following capacities:
- CBCS 10: 1000 kg/h cocoa beans
- CBCS 20: 2000 kg/h cocoa beans
- CBCS 40: 4000 kg/h cocoa beans
- CBCS 60: 6000 kg/h cocoa beans
- CBCS 80: 8000 kg/h cocoa beans
- CBCS 100: 10000 kg/h cocoa beans
- CBCS 200: 20000 kg/h cocoa beans