Roaster for granular material

Abstract

A roaster for powder and granular material capable of effectively roasting powder and granular material to the inside thereof to provide high quality powder and granular material and capable of effectively avoiding the possibility of causing contamination since the possibility of dewing is less even if the material is cooled. The roaster comprises an inlet (2) in which the powder and granular material is thrown, a drum (30) in which the powder and granular material thrown from the inlet (2) is stored, and a heating means (49) heating the powder and granular material stored in the drum (30). A preliminary heating chamber (3) in which the powder and granular material thrown from the inlet (2) is preliminarily heated and which communicates with the drum (30) is formed between the inlet (2) and the drum (30).

Description

technical field [0001] The present invention relates to a roasting furnace for particles, which is used for roasting particles such as coffee beans, tea leaves, grains and the like. Background technique [0002] Roasting in advance can increase the fragrance or flavor of particles such as coffee beans or tea leaves, etc. When producing such particles, in many cases, a large amount of particles are roasted in a roasting furnace for particles. Here, as a conventional roaster for particles, for example, a roaster for coffee beans (hereinafter referred to as a roaster) for roasting coffee beans (particles) will be described. ) into an open drum, a burner for heating the drum from below, and an agitating blade for stirring the particles contained in the drum. As another example of a roasting furnace, a tea roasting furnace for roasting tea leaves (particles) generally has: a drum, arranged in a horizontal direction, one end forms an inlet for putting the above-mentioned particle...

AI Technical Summary

Problems solved by technology

[0003] However, in order to ideally roast each particle, it is desirable to have a predetermined moisture content (for example, in terms of rice bran, it is desirable to have a moisture content of less than about 2%). The above-mentioned (coffee beans or tea leaves, etc.) particles are put into and stored in the drum through the above-mentioned opening or the inlet, and are directly roasted without forming a predetermined moisture content (low moisture content), so in most cases, no particles are roasted. The interior, while the exterior is charred black, thereby having less aroma or flavor than the original desired particulate

Moreover, in the above-mentioned roasting furnace for tea leaves, if it is cooled by external air, condensation will occur on the surface of the above-mentioned drum or stirring blade due to the moisture released from the particles during roasting in many cases, and thus cause Pollution

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