FIELD: agriculture.
SUBSTANCE: method of combined conductive and infrared drying for moving granulated fodders for livestock and poultry comprises applying the forcibly ventilated drying chamber, the infrared emitter and the conduction heater for combined drying, controlled by a power controller from all the directions of heat fluxes action on the granulated fodders. Wherein the output guide reflective funnel of the infrared emitter is oriented on the exposure zone in the form of an area of the heat-conducting conveyor belt along its length with the granulated fodders layer loaded thereon. According to the method, the conveyor belt is conductively heated from below by the conduction heater, or the conveyor roller feeding the belt is heated by it. The conveyor belt is loaded with granulated fodders through the flow meter of granulated fodder flow rate, the movement speed is set. Wherein the measurement and the movement speed control of the working body of the flow meter of granulated fodder flow rate and the conveyor belt is carried out. The infrared radiation power and the conductive heating power for the granulated fodders to be dried are set, and their measurement is carried out. The modes of infrared radiation and heat conduction are adjusted in accordance with the set powers. In the granulated fodders fed for drying, the temperature, the relative humidity and the time mass flow rate are measured. The ventilation air temperature, its relative humidity and its movement speed in the drying chamber are measured. The drying time signals, the smallest and the largest total process power of the infrared radiation and the conductive heating are set. Scanning as per the total power of the infrared radiation and heat conduction in time, the specific regional prices for livestock and poultry products, for granulated fodders and electric power is carried out. The sum power signal of the infrared radiation and the conductive heating is generated. The generated sum signal is periodically varied in the range between the technologically permissible smallest and largest set values of the signal. Wherein the first sum cost of estimated value losses of livestock and poultry products when feeding the livestock and poultry with dried granulated fodders because of their bacteriological and microbial contamination and the costs due to their quality loss as a result of their excessive infrared radiation and overheating are calculated depending on the value of the variable generated sum signal, taking into account the air ventilation conditions in the drying chamber. Depending on the value of the variable generated sum signal, taking into account the air ventilation conditions in the chamber, the second sum of the costs for estimated value losses of livestock and poultry products when feeding the livestock and poultry with dried granulated fodders because of their bacteriological and microbial contamination, as well as the costs due to their quality loss of as a result of excessive infrared radiation and overheating, the electric power costs for heating and for electric drives of the working body of the flow meter of granulated fodder flow rate and the conveyor belt and the costs for forced air ventilation in the drying chamber is calculated. The optimisation criterion of the drying mode is selected in the form of a passage permission switching signal for further actions of the first or the second calculated sum of costs; the first or the second sum is selected respectively for subsequent processes of directly feeding the livestock with dried granulated fodders of for storage or dried granulated fodder, to perform the subsequent actions of combined drying. The generated sum signal of the infrared radiation and the conductive heating, corresponding to the smallest value of the selected sum of costs, is determined. The result of calculating a predetermined total power of the infrared radiation and the conductive heat proportionally to the ratio of the surface of the granulated fodder particles, irradiated with the infrared radiation and heated by contact, are compared respectively with the measured power of the infrared radiation and the measured temperature of the support conveyor belt. By the comparison result, the mode of the infrared radiation power and the conduction heating mode are corrected additionally. The transition from the regulatory drying mode to the technically or economically optimal drying mode is controlled automatically by means of the second two-input controllable switch for passing therethrough the regulatory infrared radiation power or its technologically and economically optimal value, and the third two-input controllable switch for passing therethrough the regulatory conductive heating power, or its technologically and economically optimal value, each of which is simultaneously controlled by means of the second control body of combined infrared and conductive drying of granulated fodders for livestock and poultry.
EFFECT: achieving a technologically optimal and energy-efficient mode of drying free running fodders.
2 cl, 2 dwg
