| 主权项 |
1. A method for solidifying a floating fat and oil in a food waste water comprising a flowing step of flowing a floating fat and oil floated in a high-concentrated waste water of a food waste disposal plant into a storage tank through a suction pump; a mixing step of mixing the floating fat and oil having a high content of water with an alkali powder supplied from an alkali powder tank in a mixer to be solidified; pulverizing and forming step of pulverizing the floating fat and oil completely mixed in the mixer to a predetermined size, flowing it into a forming device, and forming it to a predetermined size; a drying step of flowing the floating fat and oil completely formed in the forming device into a drying device and drying it at a predetermined temperature; and a solidified pellet storing step of transferring pellets completely dried in the drying device through a belt conveyor to be dried and storing the pellets in a pellet storage tank, comprising the steps of:
first mixing the floating fat and oil with the alkali powder by means of the mixer while being pulverized at high speed of 300-500 rpm to a size of 5 mm or less through a double fine cutting screw connected to a driving motor, the alkali powder of 5 to 15 wt % being put into the floating fat and oil of 85 to 95 wt % so as to induce an exothermic reaction to have 80° C. or more by reacting between the alkali powder and the water of the floating fat and oil, and the moisture being partially evaporated by means of the exothermic reaction so as to remove it to outside through an upper portion of the mixer installed in the horizontal direction; flowing the first mixture into a mixing and cooling device installed in the horizontal direction, the size of the first mixture being two times larger than that of the mixer in terms of volume; inducing an even mixing and aging of the floating fat and oil and the alkali powder for 5-15 minutes through the low speed of a mixing and transferring screw to perform a second mixing, the moisture being removed to outside through the upper portion of the mixing and cooling device and the second mixture being naturally cooled at 40-60° C. and a grinding roller, in which a plurality of blades is protruded, is formed on the middle portion of the inside of the mixing and cooling device so as to pulverize to a small size of 3 mm or less; flowing the second mixture into a mixing and aging device installed in the horizontal direction, the size of the second mixture being two times larger than that of the mixing and cooling device; inducing a third mixing and aging of the second mixture, the second mixture being slowly transferred in the horizontal direction for 5-15 minutes through a double blade which is formed inside the mixing and aging device and a grinding roller, in which a plurality of blades is protruded, is formed on the middle portion of the inside of the mixing and aging device, so as to pulverize the third mixture to a size of 2 mm or less; flowing the third mixture into a forming device having a plurality of through holes with a size of 5-10 mm, the third mixture, which passes through the through holes, being formed to a size of 5-10 mm by a self-load without a separate pressure and cut in a predetermined length so as to form pellets; flowing the pellets completely formed inside the forming device by the self-load into a drying device, the pellets being dried through the indirect heating of a hot air with the temperature of 40-60° C. supplied through hot air inflow pipes and indirectly heated for 2-4 hours while inducing the flow of air in the horizontal direction in order to prevent a moisture condensation phenomenon, thereby the content of water of the pellets is less than 10%; and adjusting a drying speed and time of the dried pellets, which are discharged from the drying device through a discharging adjustable valve formed at the lower portion of the outlet of the drying device, thereby adjusting the moisture content thereof according to the need of the final drying product and moving the dried and solidified pellet to the pellet storage tank. |
