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Method for preparing kitchen waste anaerobic biogas residue biochar through ultrasonic-assisted hydrothermal carbonization

A technology of hydrothermal carbonization and kitchen waste, which is applied in the field of regeneration treatment and resource utilization of biogas residue and sludge, can solve problems such as carbonization of organic materials, and achieve the effects of increased moisture content, simple process, and easy process

Active Publication Date: 2020-11-10
宁波首创厨余垃圾处理有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004]However, kitchen waste anaerobic biogas residues contain various organic components such as plastics, cloth, wood, fibers, etc. carbonization of organic materials, so this application provides a method for preparing kitchen waste anaerobic biochar by ultrasonic-assisted hydrothermal carbonization

Method used

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  • Method for preparing kitchen waste anaerobic biogas residue biochar through ultrasonic-assisted hydrothermal carbonization
  • Method for preparing kitchen waste anaerobic biogas residue biochar through ultrasonic-assisted hydrothermal carbonization

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Effect test

Embodiment 1

[0029] The kitchen waste anaerobic biogas residue and water are introduced into the ultrasonic-assisted hydrothermal carbonization reactor according to the solid-to-liquid ratio of 1:1 to react, the filling degree is 70%, the hydrothermal temperature is controlled at 200°C, and the internal pressure of the reactor is 1.5Mpa. Time 8h, ultrasonic power 700W, after the reaction, the product was cooled, vacuum or negative pressure filtered, dried (105°C, 2h), crushed and separated, and the yield of biochar was 60%.

Embodiment 2

[0031] The anaerobic biogas residue of kitchen waste and water are introduced into the ultrasonic-assisted hydrothermal carbonization reactor according to the solid-to-liquid ratio of 1:1 for reaction. The filling degree is 70%. Time 8h, ultrasonic power 700W, after the reaction, the product was cooled, vacuum or negative pressure filtered, dried (105°C, 2h), crushed and separated, and the yield of biochar was 63%.

Embodiment 3

[0033] The anaerobic biogas residue of kitchen waste and water are introduced into the ultrasonic-assisted hydrothermal carbonization reactor according to the solid-to-liquid ratio of 1:1 for reaction. The filling degree is 70%. Time 8h, ultrasonic power 700W, after the reaction, the product was cooled, vacuum or negative pressure filtered, dried (105°C, 2h), crushed and separated, and the yield of biochar was 65%.

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Abstract

The invention discloses a method for preparing kitchen waste anaerobic biogas residue biochar by ultrasonic-assisted hydrothermal carbonization, which comprises the following steps: S1, mixing kitchenwaste anaerobic biogas residue with water, and carrying out hydrothermal carbonization reaction on the mixture under ultrasonic-assisted conditions to obtain a hydrothermal carbonization solution; and S2, carrying out cooling, filtering, drying, crushing and sorting operations the hydrothermal carbonization liquid to obtain biogas residue biochar. The method is simple and easy to implement and easy to popularize, wherein ultrasonic-assisted hydrothermal carbonization reaction is adopted, ultrasonic vibration has a certain stirring effect, the cavitation effect of ultrasonic can enable local high temperature and high pressure (5000 k or above) to be generated instantly, organic components difficult to carbonize in the organic components can also be carbonized, and the reaction is more complete. By means of vacuum filtration, so that the engineering level and the moisture content of a filtered product are greatly improved; by means of the crushing and sorting operations, the original materials with different shapes and non-uniformity can be further granulated, and the purity of the carbonized product is improved.

Description

technical field [0001] The invention belongs to the technical field of regeneration treatment and resource utilization of biogas residue, and in particular relates to a method for preparing kitchen waste anaerobic biochar from kitchen waste by ultrasonic-assisted hydrothermal carbonization, which is used for kitchen waste treatment. Background technique [0002] Kitchen waste anaerobic biogas residue refers to the garbage generated in the daily life of residents and activities such as food processing, catering services, and unit meals, including discarded vegetable leaves, leftovers, leftovers, fruit peels, eggshells, tea dregs, bones, etc. , plastics, cloth, wood, fibrous substances and other organic components, the main sources of which are home kitchens, restaurants, restaurants, canteens, markets and other industries related to food processing. Kitchen waste contains extremely high moisture and organic matter, which is easy to rot and produce stench. Random disposal will...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F11/10
CPCC02F11/10Y02E50/30
Inventor 龚佳豪殷进易兆青王侃刘荣明
Owner 宁波首创厨余垃圾处理有限公司
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