Kitchen garbage drying device and method

Abstract

The invention relates to a device for desiccating food residue and method thereof, specifically to a device for drying food residue and method thereof. The inventive food residue drying device comprises a feeding rotary joint (1), a feeding pipe (2), a hollow disc (3), a conduit (4), a feed inlet (5), an exhaust pipe (6), a checking port (7), a shell (8), a scraper blade (9), propellers (10), a coil pipe (11), a hollow shaft (12), a discharge rotary joint (13), a discharge pipe (14), a discharge port (15) and a supporting seat (16). The inventive food residue drying method comprises the following steps of: feeding high-temperature heat-conducting media into the rotary hollow shaft, hollow disc and coil pipe from the feeding pipe to dry the food residue in the shell through uniform heating of the hollow cavity wall, mixing the food residue by the propellers on the hollow disc and coil pipe and the scraper blade on the inner wall of the shell to move the food residue toward the discharge port at uniform speed, and discharging the exhaust gas generated during drying process to a following exhaust gas treatment device. The inventive drying device and method can rapidly dry food residueand kill noxious bacteria and pathogenic bacteria in the food residue, so as to ensure the sanitation and safety of the food residue.

Description

technical field [0001] The invention relates to a drying device and method, in particular to a drying device and method for kitchen waste. Background technique [0002] With the acceleration of urbanization, people's living standards have improved significantly, and the catering service industry has developed rapidly. However, due to our country's inherent living and eating habits and some waste phenomena, a large amount of kitchen waste is generated. Food waste is a kind of organic waste that is easy to ferment and deteriorate. In the past, it was often transported directly to rural areas by criminals as feed for pigs and chickens. Due to the lack of disinfection and harmless treatment, food waste was directly fed to pigs and chickens. Such livestock and poultry are likely to cause the spread of pathogenic bacteria and homologous biological contamination. These "garbage pigs" and "garbage chickens" will further enter the human food chain and will form potential food safety...

AI Technical Summary

Problems solved by technology

Although the drying method of direct heating has high thermal efficiency, it is difficult to control the process of directly heating the food waste through the combustion flame. The heating area is small and the heating is uneven. There are many unsafe hidden dangers such as burning combustibles in kitchen waste or circuit fires. Therefore, there are many problems in large-scale use in engineering

However, indirect heating is a very effective drying method, but the traditional indirect heating method has disadvantages such as small heat transfer area, large heat loss, easy adhesion of garbage on the heat transfer medium, and reduced heat transfer efficiency. At the same time, manual shutdown is required for cleaning , affecting the operating efficiency of the equipment

For the indirect heating container with closed operation, the steam pressure in the container is high, the drying rate is low, and there are potential safety hazards

In addition, a large amount of acid gas is easy to corrode the container wall and reduce the service life of the heating container

[0005] The water content of food waste is relatively high, and its water content accounts for about 75%-85% of the total waste, which is not conducive to traditional methods such as landfill, incineration, composting, and pyrolysis. Cause secondary pollution to the soil and groundwater environment, and the treatment cost is too high and the cycle is too long

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