A tin reduction furnace is disclosed. The tin reduction furnace, according to the present invention, comprises: a housing which forms the exterior; a reaction part in which a metal reduction reaction occurs and which comprises an upper reaction part having, on the top side thereof, an inflow hole for inputting a metal material and gas, and a lower reaction part coupling to the upper reaction part and having, on the bottom side thereof, an outflow hole for discharging a reduced metal; a fire-resistant wall which is provided so as to surround the lower reaction part in the circumferential direction; a heater which is provided to the fire-resistant wall so as to heat the metal material inputted in the reaction part; and a material input part which inputs the metal material and the gas into a reaction space inside the reaction part by mixing, from outside of the reaction space, the metal material and the gas with each other, and then supplying same by downwardly spraying the metal material and the gas from the top side of the reaction space toward the reaction space.
The present invention relates to a food drying system. The purpose of the present invention is to provide a food drying system which: can efficiently dry food and remarkably reduce food-drying time and thus can dry a large amount of food in a short time; can simplify the entire system and reduce device costs; can easily secure and use a space and thus increase the food drying capacity and improve the drying efficiency and drying productivity; and can maximize the quality of dried food. With respect to the technical configuration, the food drying system comprises a heat plate (70) disposed at the lower end of a support frame (24), wherein one end of the heat plate (70) separably communicates with a pipe of a compressor (31), the other end thereof separably communicates with a pipe of a condenser (33), and a tray (25) positioned above the heat plate is heated by latent heat generated in a high-temperature solvent flowing from the compressor (31) to the condenser (33).
THE INDUSTRY & ACADEMIC COOPERATION IN CHUNGNAM NATIONAL UNIVERSITY (IAC) (Republic of Korea)
Inventor
Han, Jun Hyun
Kim, Hyun You
Lee, Sang Ro
Wie, Hyeong Cheol
Kim, Sang Yeol
Abstract
The present invention relates to a method for recovering high purity tin, and at the same time, producing hydrogen from tin oxides using a methane gas, and by using a methane gas reduction method which combines a tin recovery process and a hydrogen producing process, high purity tin may be stably recovered and at the same time, hydrogen which is a novel clean energy source may be produced without generating environmental pollutants such as carbon dioxide, sulfur dioxide and nitrogen oxide from methane gas and tin oxides. In addition, by recycling waste materials including tin oxides, which are generated in various industries, according to the present invention, environmental pollution may be prevented, and by stably recovering high purity tin, which is an expensive metal, and at the same time, by significantly decreasing hydrogen production costs, economic feasibility is increased and so efficient use of resources may be achieved.
A multi-stage separation heat-exchange type drying system according to the present invention is configured such that, if warm air (hereinafter 'first air') of waste heat discharged from a dryer (100) enters a heat exchange device (900) through a discharge line (110), the heat exchange device (900) performs a heat exchange so as to recover heat from the warm first air and supply the heat to outdoor cold air (hereinafter 'second air') and then discharge the heat. The heat exchange between the first air and the second air is performed by a heat medium, and the heat medium absorbs heat from the warm first air introduced to a first main body (300) by circulating throughout the first main body (300) and then is introduced to a second main body (400), and the heat medium introduced to the second main body (400) supplies heat to the cold second air. The first main body (300) and the second main body (400) of the heat exchange device (900) have structures corresponding to each other. That is, a plurality of first heat exchange blocks (700) of the first main body (300) are installed to be spaced from each other at a predetermined interval, and first vortex generating blocks (750) are installed between the first heat exchange blocks (700). Also, a plurality of second heat exchange blocks (800) of the second main body (400) are installed to be spaced apart from each other at a predetermined interval, and second vortex generating blocks (850) are installed between the second heat exchange blocks (800). The heat exchange occurs in a manner that the first heat exchange blocks (700) and the second heat exchange blocks (800) corresponding to each other, positioned up and down, exchange a heat medium therebetween.
A food dryer according to the disclosed present invention comprises: drying conveyor belts (100), provided in multiple tiers in the vertical direction, for loading thereon food to be dried in a drying chamber (20); a raw material inlet port (120), provided correspondingly on the upper portion of one end of an uppermost drying conveyor belt (100a), for introducing therein food for drying; and a raw material outlet port (130), provided correspondingly on the lower portion of one end of a lowermost drying conveyor belt (100c), for discharging food of which drying is completed. In addition, the drying conveyor belts (100) are independently driven from each other, wherein the drying conveyor belts (100), which are vertically adjacent to each other, are rotated in the opposite directions to each other, and also the drying conveyor belts (100), which are vertically adjacent to each other, are arranged such that one of the drying conveyor belts (100) is installed with one side thereof protruding more and the other side thereof retracted less relative to the other drying conveying belts (100). Accordingly, when the drying conveyor belts (100) are driven, food introduced through the raw material inlet port (120) to the uppermost drying conveyor belt (100a) is moved and loaded by passing the drying conveyor belts (100) sequentially in the lower direction.
A23L 3/01 - Preservation of foods or foodstuffs, in general, e.g. pasteurising, sterilising, specially adapted for foods or foodstuffs by heating using irradiation or electric treatment using microwaves or dielectric heating
A23L 3/16 - Preservation of foods or foodstuffs, in general, e.g. pasteurising, sterilising, specially adapted for foods or foodstuffs by heating loose unpacked materials
A23L 3/42 - Preservation of foods or foodstuffs, in general, e.g. pasteurising, sterilising, specially adapted for foods or foodstuffs by drying or kilning; Subsequent reconstitution with addition of chemicals before or during drying
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