Homogenization and deoiling integrated steam self-rotation damp-heat pretreatment device and pretreatment method

Abstract

A homogenization and deoiling integrated steam self-rotation damp-heat pretreatment device mainly comprises a cylindrical pretreatment reaction tank, a temperature-control oil guide pipe is arranged between the inner wall and the outer wall of a tank body of the pretreatment tank, and the temperature-control oil guide pipe is filled with heat conduction oil. The temperature-control oil guide pipe makes contact with the inner wall of the tank body. The portion between the temperature-control oil guide pipe and the outer wall of the tank body is filled with a heat-preservation material. A feed inlet is formed in a top cover of the tank body, and a discharge opening is formed in the bottom of the tank body. A steam coiled pipe distributed spirally is installed in the tank body of the pretreatment tank. The inner side and the tail end of the steam coiled pipe are provided with steam sprayers, the curvature radius of the steam sprayers is equal to the circular radius of the steam coiled pipe, and the included angle between the arc tangential line of the steam sprayers and the circular tangential line of the steam coiled pipe ranges from 5 degrees to 10 degrees. A tubular deoiler is arranged on the upper portion of the tank body of the pretreatment reaction tank, a peristaltic pump is disposed in an oil guide port of the deoiler, and scrapped grease is sucked and transferred to a waste oil recycling box. The invention further discloses a kitchen waste pretreatment method 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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