A food waste pretreatment system and method

Abstract

The invention relates to the field of waste pretreatment and discloses a kitchen waste pretreatment system and method. The kitchen waste pretreatment system comprises solid-liquid separation equipment, oil washing separation equipment, slurrying crushing equipment, a sand eliminator, heating equipment and separation equipment. The solid-liquid separation equipment is used for separating kitchen waste into solid phase materials and an oil and water mixture. The oil washing separation equipment is used for washing oil in the solid phase materials and separating the solid phase materials into first sundries and first materials. The slurrying crushing equipment is used for crushing and slurrying the first materials and separating the first materials into second sundries and second materials. The sand eliminator is used for separating the second materials into gravel and third materials. The heating equipment is used for heating the third materials and the oil and water mixture. The separation equipment is used for separating materials from the heating equipment into oil, water and slag materials. Through the kitchen waste pretreatment system, efficient pretreatment of the kitchen waste can be completed.

Description

technical field [0001] The invention relates to the field of garbage pretreatment, in particular to a system and method for pretreatment of kitchen garbage. Background technique [0002] Food waste treatment and disposal is a complex system engineering, and the most critical link is the pretreatment process of food waste. Because the materials of food waste contain various types and states of substances, such as grease, sand, plastics, etc., including recyclable organic substances and non-recyclable inorganic debris. Therefore, in the process of processing, it is necessary to pre-treat the material first to remove impurities and divide the material into water, oil and residue, and then carry out subsequent treatment on water, oil and residue respectively. [0003] The treatment effect of pretreatment is directly related to the effective implementation of subsequent anaerobic or aerobic composting process. The current pretreatment process focuses on the process of crushing ...

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Problems solved by technology

[0004] In the above pretreatment method, the food waste is highly viscous, complex in composition, and contains a large amount of sundries. The glass bottles and porcelain pieces contained in it are crushed into sand by the roller crusher and mixed into the slurry, which will aggravate the wear of the pipeline; Lack of desanding process, its foreign material separator can only separate some inorganic substances with larger particles, while the broken ceramic and glass pieces will be kneaded together with the slurry, which will cause great damage to the subsequent oil-water separation device. Large damage will seriously affect the service life of oil-water separation and loading; in addition, the slurry entering the anaerobic tank contains a large amount of sand and gravel, which will settle at the bottom of the anaerobic tank, reducing the anaerobic space, and the particle size cannot Meet the requirements of the subsequent anaerobic process

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