Homogeneous deoiling integrated steam spin wet heat pretreatment device and pretreatment method

Abstract

A homogeneous deoiling integrated steam spin wet heat pretreatment device mainly includes: a cylindrical pretreatment reaction tank, a temperature control oil guide pipe is arranged between the inner wall and the outer wall of the pretreatment tank, and the temperature control oil guide The tube is filled with heat conduction oil, the temperature control oil guide tube is in contact with the inner wall of the tank, and the space between the temperature control oil guide tube and the outer wall of the tank is filled with thermal insulation material, the top cover of the tank body is equipped with a feed port, and the bottom of the tank body is provided with a discharge port ;The tank body of the pretreatment tank is equipped with spirally arranged steam coils, and the inner side and the tail of the steam coils are provided with steam nozzles. The curvature radius of the steam nozzles is equal to the circle radius of the steam coils. The included angle of the circle tangent is between 5° and 10°; the upper part of the pretreatment reaction tank is equipped with a tubular oil remover, and the oil guide port of the oil remover is equipped with a peristaltic pump to suck out the scraped grease and transfer it to the waste oil recycle bin. The invention also discloses a method for pretreating kitchen waste by using the device.

Description

technical field [0001] The invention belongs to the field of solid waste recycling, and in particular relates to an integrated steam spin wet heat pretreatment device for homogeneous deoiling of kitchen waste. [0002] The present invention also relates to a method for pretreatment of kitchen waste by using the above-mentioned device. Background technique [0003] In recent years, with the improvement of living standards and the rapid development of the tertiary industry, the catering industry has become an important part of China's economy and society. At the same time, the amount of kitchen waste is increasing year by year, and kitchen waste has become the main component of domestic waste. The average content of kitchen waste in the domestic waste of the seven major cities in the country reaches about 52%. In some areas, kitchen waste is simply piled up, breeding mosquitoes and flies, producing stench, causing environmental pollution, and posing a great risk to human heal...

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Problems solved by technology

However, mesophilic anaerobic fermentation is generally used in the anaerobic fermentation treatment process of engineered kitchen waste. At this temperature, all vegetable oils exist in a liquid state, while animal oils generally have a melting point of 40-55 ° C, which is difficult to melt and float on the water surface.

The stirring paddles of the existing wet heat treatment equipment age quickly, and the equipment is not suitable for long-term use; and the existing wet heat treatment equipment generally adopts oil bath heating, the heat and mass transfer efficiency is low, and the wet heat treatment requires high temperature and high energy consumption. The current wet heat treatment equipment generally does not consider the problems of waste heat recovery and effective utilization of heat recovery; in addition, due to the high temperature of wet heat treatment, it is easy to cause water evaporation, resulting in low moisture content of kitchen waste, and anaerobic fermentation. If the material is not smooth or it is necessary to set up another blending pool before feeding, in order to achieve the purpose of homogenization of food waste

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