Description of the bottom of the cylindro conical fermenter
Cone bottom angle is generally 60 ° -80 °, there are also 90 ° -110 °, but more for large-capacity fermentation tanks. The conical bottom height of the fermenter is related to the included angle, the smaller the included angle and the higher the bottom of the cone. The cone bottom height of a typical tank is about 1/4 of the total height and should not exceed 1/3. The outer wall of the conical bottom should be provided with a cooling layer to cool the precipitated yeast at the bottom of the cone. Cone bottom should also be installed in and out of the pipeline, valves, sight glass, pressure sensor components. In addition, the ratio of the diameter and height of the tank is usually 1:2 to 1:4, and the total height is preferably not more than 6m so as not to cause strong convection and affect the sedimentation of yeast and coagulum. The working pressure of the general fermenter is controlled at 0.2MPa-0.3MPa. The inner wall of the tank must be smooth and smooth, and the inner wall of the stainless steel tank must be polished. The coating on the inner wall of the carbon steel tank should be uniform, free of convex and concave surfaces and no granule protrusion.
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