Method and device for extracting oil from kitchen garbage

A technology of kitchen waste and extraction method, which is applied in the field of oil recovery of oily wastes, and achieves the effects of high work efficiency, reduced use of raw material steam, and high degree of automation

Active Publication Date: 2013-06-05
四川深蓝环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Aiming at the problems existing in the current kitchen waste treatment technology, the present invention provides a method and device capable of effectively separating and extracting oil components in kitchen waste, so as to solve the problem of kitchen waste recycling and reuse

Method used

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  • Method and device for extracting oil from kitchen garbage
  • Method and device for extracting oil from kitchen garbage

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Example 1. Kitchen waste with a water content of 88.1% and a total oil content of 123.4mL / kg is transported to the preheating tank through a paste pump, mixed with flash steam and preheated to 60°C, 0MPaG, and the residence time is 30min; The water heating feed pump pumps the preheated material into the water heating tank, and heats it to 140°C with raw material steam, 0.4MPaG, and the reaction time is 10 minutes; after the reaction, the kitchen waste enters the flash tank to lower the temperature and pressure, and the temperature of the flash tank The temperature is 80°C, the pressure is 0 MPaG, and the residence time is 10 minutes; the kitchen waste slurry after flashing flows to the oil-water separator by itself for oil-water separation; the obtained oil is stored in the oil storage tank.

[0039] As a result of the reaction, the floatable oil content of the kitchen waste slurry was 38.1 mL / kg, and the oil recovery rate was 30.9%.

Embodiment 2

[0040] Embodiment 2, keeping the reaction time of the hydrothermal tank continued for 30min, and other reaction conditions were the same as in Embodiment 1. As a result of the reaction, the floatable oil content of the kitchen waste slurry was 44.3mL / kg, and the oil recovery rate was 35.9%.

Embodiment 3

[0041] Embodiment 3, keep the hydrothermal tank reaction time to continue 50min, other reaction conditions are the same as embodiment 1. As a result of the reaction, the floatable oil content of the kitchen waste slurry was 45.9 mL / kg, and the oil recovery rate was 37.2%.

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Abstract

The invention provides a method and a device for extracting oil from kitchen garbage. The method comprises the following steps of conveying kitchen garbage into a preheating tank, carrying out preheating, feeding the pre-heated kitchen garbage into a hydrothermal reactor by a pump, heating to a reaction temperature, carrying out a reaction process so that floating oil is formed, feeding the reacted kitchen garbage into a flash tank, carrying out temperature and pressure reduction, and carrying out oil-water separation of the kitchen garbage slurry subjected to flash evaporation to obtain oil. The method and the device adopt a kitchen garbage high-temperature high-pressure treatment technology, realize thorough killing of pathogens in kitchen garbage, realize production of floating oil convenient for recovery, and realize an oil recovery rate more than 90%.

Description

technical field [0001] The invention relates to the technical field of solid waste treatment, in particular to a method and device for recovering oil from oily waste such as kitchen waste. Background technique [0002] Kitchen waste is a general term for leftover meals discarded by eating and drinking units such as families, hotels, and restaurants. At present, about 30% of the vast majority of urban waste in the world is kitchen waste, mainly including rice and flour food residues, vegetables, vegetable oils, animal oils, meat bones, fish bones, etc. Its chemical components are mainly starch, cellulose, protein, lipid and inorganic salts. Kitchen waste has the following characteristics: First, the content of organic matter such as crude protein and crude fiber is relatively high (respectively accounting for 16.73% and 2.52% of the dry matter of kitchen waste), which is of great value for development and utilization, but it is perishable and produces stench: second is The ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09B3/00
Inventor 谢非周巍陈科宇
Owner 四川深蓝环保科技有限公司
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