The speed of the screw oil press cannot be corrected at will
The speed of the screw oil press shall not be corrected at will, otherwise it will affect the oil yield of the oil press, otherwise it should be 3d/min.
The process conditions are different from the structure of the oil press, so the required reasonable pressing time is different. Therefore, measure or determine the relationship between pressing time through pressing, pressing time and actual compression ratio :VZ "T=(4-8 min) mean residence time (min): VM-total free volume of pressing (cm3):VZ measure or calculate pressing volume per minute (cm3/ min), n- actual compression ratio of pressing. Extrusion time is related to oil production efficiency. It is generally believed that the pressing time is long and the oil flow is long, but the pressing time should not be too long, otherwise the heat loss will be large, which will affect the oil efficiency and production capacity.
Therefore, under the premise of satisfying the oil production efficiency, the pressing time should be as short as possible. The residence time of the embryo in the pressing chamber mainly depends on the speed of the spiral shaft, followed by the old and new degree of the pressing ring and the thickness of the cake. For some oil with high oil content, the pressing time can be extended appropriately, and the appropriate speed should be selected. The screw oil press is a high-speed pancake. The so-called high speed, refers to the spindle speed is fast, the material embryo in the extrusion room stay time is short (generally only tens of seconds); The so-called pancake refers to the thickness of the pancake is 1.5~3mm. Therefore, the wear rate of the screw oil press is quite fast.
Based on experience, it is usually necessary to inspect 40 to 50 tons of rapeseed per processing and replace some vulnerable parts (especially the pie heads). The extrusion time of the screw oil press should be shorter, which is conducive to some oils (such as cold-pressed soybeans, protein protection, etc.), but other oils further reduce the residual oil rate of dry cake is limited to a certain extent, and different oils have corresponding spindle speed.
