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Process for co-producing electrical carbon through anaerobic and pyrolysis coupling of organic waste

A technology of organic waste and pyrolysis, which is used in the removal of solid waste, waste fuel, waste treatment, etc., can solve the problems of secondary pollution of biogas residue, and achieve the effect of improving yield

Inactive Publication Date: 2019-04-16
江苏久力环境科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, a single anaerobic fermentation technology can only partially treat organic waste, and the obtained biogas residue will cause secondary pollution

Method used

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  • Process for co-producing electrical carbon through anaerobic and pyrolysis coupling of organic waste

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Experimental program
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Effect test

Embodiment 1

[0031] A process for the coupled anaerobic-pyrolysis co-production of electric charcoal from organic waste, comprising the following steps:

[0032] The residue obtained by anaerobic fermentation of organic waste is used as the reaction raw material for the pyrolysis reaction, and the biogas obtained by anaerobic fermentation and the pyrolysis gas obtained by the pyrolysis reactor are used to remove CO by pressure swing adsorption. 2 The energy gas is obtained, and the energy gas is passed into the local gas network for gas supply, and can also generate electricity through the internal combustion engine power generation system to supply power for the local power grid. The pyrolysis residue obtained from the pyrolysis reactor is mechanically modified to obtain a soil remediation agent, which is applied to the soil remediation area. The waste heat obtained from pyrolysis reactor, internal combustion engine power generation system, pressure swing adsorption and mechanical modific...

Embodiment 2

[0034] A process for the coupled anaerobic-pyrolysis co-production of electric charcoal from organic waste, comprising the following steps:

[0035] Add raw vinegar grains with solid content >30% and inoculum to an anaerobic fermentation tank for anaerobic fermentation, stir continuously, mix evenly, and produce 0.20-0.25m 3 / kg methane, after 30 days of fermentation, part of the vinegar residue was taken out, the biogas slurry was refluxed into the fermenter, and this operation was repeated every day to obtain anaerobic vinegar residue. The anaerobic vinegar grains are mixed evenly, dehydrated and dried, crushed to less than 3mm, and put into a fixed-bed pyrolysis reactor for pyrolysis. The pyrolysis atmosphere is a nitrogen atmosphere, and the pyrolysis temperature is 600°C. pyrolysis to H 2 、CH 4 , CO and other energy gases, the gas yield rate is 45%, and the biochar yield rate is 36%, of which the energy gas H 2 +CO+CH 4 The overall proportion is 84%. Overall, the sol...

Embodiment 3

[0037] A process for the coupled anaerobic-pyrolysis co-production of electric charcoal from organic waste, comprising the following steps:

[0038] Add organic waste 1 (slurry kitchen waste with a solid content of 40%) and anaerobic activated sludge (water content 95%) with a volume ratio of 1:1 into anaerobic fermentation tank 2 for the first anaerobic fermentation. Aerobic fermentation, the time of the first anaerobic fermentation is 35 days, and the reaction temperature of the first anaerobic fermentation is controlled to be 35°C;

[0039] The first anaerobic fermentation contains CO 2 with CH 4 The biogas 13 enters the pressure swing adsorption unit 5 through pressure swing adsorption of CO 2 , get energy gas 16;

[0040] After the solid-liquid separation of the anaerobic digestion reaction output obtained from the first anaerobic fermentation, the biogas slurry is refluxed into the anaerobic fermentation tank 2 for recycling, and new organic waste 1 is added, and the ...

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Abstract

The invention discloses a process for co-producing electrical carbon through anaerobic and pyrolysis coupling of organic waste. Solid residuesobtained after anaerobic pretreatment are used as a raw material for pyrolysis, under the effect of methane bacteria, some organic molecules,for example, protein and fat, free around biomassmacromolecules in an anaerobic systemin the anaerobic fermentation process produce hydrolysis reaction with amorphous hemicellulose to generate marsh gas, the residual cellulose and lignin cannot be utilized by the anaerobic system and enter a pyrolysis reactor afterbeing dried, energy gases such as H2, CH4 and CO are prepared by utilizing a thermochemical method, accordingly theenergy gas yield is improved, and the vinegar grain reduction rate is improved. Gasesproduced by an anaerobic fermentation process and the pyrolysis reaction are subjected to variable-pressure adsorption and CO2 removal, pure energy gases are obtained and applied for power generationand gas supply, a by-product biochar can be applied to soil remediation, and heat utilization rate is improved through waste heat recovery. The system can achieve energy self-sufficiency.

Description

technical field [0001] The invention belongs to the technical field of solid waste energy conversion, and in particular relates to a process for co-producing electric charcoal through anaerobic-pyrolysis coupling of organic waste. Background technique [0002] Biomass energy, as the only green renewable energy containing carbon resources, is widely distributed and has sufficient sources. It will be an ideal energy choice to solve increasingly prominent energy and environmental problems, realize the diversification of energy supply, and at the same time obtain high value-added chemical energy. Taste. Organic solid waste is an important class of biomass resources. The solid particles produced by traditional combustion cause serious pollution and affect the green development of agriculture in my country. Its green transformation and utilization is one of the research hotspots in the field of renewable energy. Synthesis gas, methane, tar and residue can be obtained by pyrolysis...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C12P5/02B09B3/00B09B5/00C10B53/00C10B57/10F02B43/10B09C1/08
CPCB09B3/00B09B5/00B09C1/08C10B53/00C10B57/10C12P5/023F02B43/10F02B2043/103Y02E50/30Y02T10/12Y02T10/30Y02W30/20Y02P20/129Y02P20/59
Inventor 高阳秦笑梅赵紫祥张蕴
Owner 江苏久力环境科技股份有限公司
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