Method for preparing fuel oil by hydrothermally liquefying kitchen waste

A technology for kitchen waste and hydrothermal liquefaction, which is applied in chemical instruments and methods, preparation of biofuels, and liquid hydrocarbon mixtures, etc. The effect of reducing pollution and high added value

Active Publication Date: 2017-09-15
ZHEJIANG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, the hydrothermal preparation of organic fertilizers is m

Method used

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  • Method for preparing fuel oil by hydrothermally liquefying kitchen waste
  • Method for preparing fuel oil by hydrothermally liquefying kitchen waste

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Embodiment

[0050] Such as figure 1As shown, after collecting and transporting the garbage in the special bucket for food waste to the processing center, sort out impurities such as plastics, fabrics, and large bones in the food waste. Centrifuge the sorted food waste and collect the upper layer of oil separately as industrial raw materials; coarsely crush the residual food and suspension in the lower layer. After crushing, there are no obvious large pieces of food, and the particle size is less than 10cm. The coarsely crushed swill suspension was mixed with circulating water, so that the solid content of the mixed liquid was 11.1 wt%, and the pH was adjusted to 3.0. The mixed food waste is sent to the preheating tank through the feed bin, and the high-temperature steam recovered after flash evaporation is used to preheat the feed, and the final temperature of preheating is 90°C. Put the preheated kitchen waste into the reactor, heat it to 320°C, the pressure is 10.9MPa, the stirring spe...

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Abstract

The invention discloses a method for preparing fuel oil by hydrothermally liquefying kitchen waste, which can realize fast and efficiency resource utilization of the kitchen waste. After the kitchen waste is collected, inorganic impurity in the kitchen waste is separated, and the residue is used as raw materials; the separated raw materials are subjected to centrifuging and standing processing, grease on the upper layer is separated as biodiesel or industrial grease raw materials, massive residue food in the lower layer and swill turbid liquid are fed into a hydrothermal reaction kettle, a temperature in the reaction kettle is controlled within 290-350 DEG C, a self pressure range is 8-15MPa, stirring and standing under a hydrothermal condition for 20-60min are performed, a relief valve is opened, and discharged high temperature steam preheats charged materials and is recycled. After pressure relief, an organic solvent (mixed alkanes) is added to extract product oil adhered to the bottom and wall surface of the reaction kettle. The method for preparing fuel oil by hydrothermally liquefying kitchen waste can realize resource utilization of the high water content kitchen waste, and organic waste with an extremely low heat value is subjected to hydrothermal liquefying to prepare the fuel oil with a high heat value and high additional value.

Description

technical field [0001] The invention relates to a method for preparing fuel oil through hydrothermal liquefaction of kitchen waste, which can realize energy utilization of organic matter in kitchen waste. Background technique [0002] Food waste refers to food residues, waste oil, expired food, etc. produced in canteens, restaurants, and community households during food processing, catering services, and meals. Food waste is rich in organic matter (75-95wt%.d), mainly composed of sugar, protein and fat, so it is easy to breed harmful bacteria during stacking or transportation, and improper handling can easily lead to various cross-infection diseases. The moisture content of kitchen waste is generally 65-85wt%, and its high calorific value on a dry basis is lower than 20MJ / kg. If it is used for incineration for power generation, it needs to face a series of problems such as dioxin and other pollutants and pretreatment dehydration. Garbage is not suitable for incineration. "...

Claims

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Application Information

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IPC IPC(8): B09B3/00B09B5/00C11B13/00C10G1/00
CPCC10G1/002C11B13/00B09B5/00C10G2300/1003B09B3/80Y02W30/74Y02W30/78Y02E50/10
Inventor 池涌舒迪王飞蒋旭光严建华黄群星李晓东陆胜勇
Owner ZHEJIANG UNIV
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