Method for producing oil by co-pyrolysis of house refuse and forestry and agricultural residues

A technology for agricultural and forestry wastes and domestic wastes, which is applied in the field of co-pyrolysis of domestic wastes and agricultural and forestry wastes to prepare fuel oil, can solve problems such as insufficient self-sufficiency of pyrolysis energy, and achieves promotion of pyrolysis reaction, yield improvement, and technological process. simple effect

Inactive Publication Date: 2016-12-28
CHINA UNIV OF MINING & TECH (BEIJING)
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  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the problem of self-sufficiency of energy self-sufficiency in separate pyrolysis of domestic waste, and select agricultural and forestry waste with a higher hydrogen-carbon ratio than domestic waste, so that the two can be co-pyrolyzed, which can not only solve the problem of insufficient energy self-sufficiency in the separate pyrolysis of waste ; and the co-pyrolysis process of the two can produce a synergistic effect, promote the pyrolysis reaction, and increase the yield of pyrolysis oil; moreover, it can simultaneously process domestic garbage and agricultural and forestry waste as resources

Method used

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  • Method for producing oil by co-pyrolysis of house refuse and forestry and agricultural residues
  • Method for producing oil by co-pyrolysis of house refuse and forestry and agricultural residues

Examples

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Effect test

Embodiment 1

[0023] Mix domestic garbage and corn stalks evenly, the proportion of corn stalks in the mixed material is 50wt%, put the mixed material in a pyrolysis reactor, and heat from room temperature to 450°C to 650°C under anaerobic conditions, and the residence time is 30min. Volatile products enter the condensing device in gaseous form, non-condensable gas and pyrolysis coke backburn provide energy for the pyrolysis and drying process, and the condensed gas is recovered as pyrolysis liquid, which is separated from oil and water to obtain pyrolysis oil and water-soluble liquid . See the co-pyrolysis test results of domestic waste and corn stalks figure 2 , it can be found that in the range of the final pyrolysis temperature of 450°C to 650°C, with the increase of the pyrolysis temperature, the yield of pyrolysis oil first increases and then decreases, and the yield of pyrolysis oil reaches a maximum value of 11.94 at 550°C %.

Embodiment 2

[0025] Mix domestic garbage with corn stalks, cassava stems, and rice husks evenly. The proportion of agricultural and forestry wastes in the mixed material is 50wt%. The mixed material is placed in a pyrolysis reactor and heated from room temperature to 550°C under anaerobic conditions. The residence time is 30min. Volatile products enter the condensing device in gaseous form, non-condensable gas and pyrolysis coke backburn provide energy for the pyrolysis and drying process, and the condensed gas is recovered as pyrolysis liquid, which is separated from oil and water to obtain pyrolysis oil and water-soluble liquid . The test results of co-pyrolysis of garbage and the above-mentioned agricultural and forestry wastes and separate pyrolysis of garbage are shown in image 3 , it can be seen that the yield of pyrolysis oil has been improved to varying degrees after adding agricultural and forestry wastes. Among them, the increase of pyrolysis oil yield after adding cassava ste...

Embodiment 3

[0027] Mix domestic garbage and corn stalks evenly, the proportion of corn stalks in the mixed material is 0wt%, 10wt%, 30wt%, 50wt%, respectively, put the mixed material in a pyrolysis reactor, and heat it from room temperature to 550°C under anaerobic conditions , residence time 30min. Volatile products enter the condensing device in gaseous form, non-condensable gas and pyrolysis coke backburn provide energy for the pyrolysis and drying process, and the condensed gas is recovered as pyrolysis liquid, which is separated from oil and water to obtain pyrolysis oil and water-soluble liquid . The co-pyrolysis test results of domestic waste and different proportions of corn stalks are shown in Figure 4 , it can be seen that the yield of pyrolysis oil increases after adding different proportions of corn stalks. In the range of 0wt% to 50wt%, with the increase of the proportion of cornstalks, the yield of pyrolysis oil increases continuously.

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Abstract

The invention provides a method for producing oil by co-pyrolysis of house refuse and forestry and agricultural residues. According to the invention, the house refuse and the forestry and agricultural residues are crushed and dried, the materials are uniformly mixed according to certain proportion, a mixture is put into a pyrolysis reactor, the mixture is heat from room temperature to certain temperature under anoxic condition for pyrolysis, the mixture is stayed at pyrolysis final temperature for a while, the volatilization products are introduced into a condensation apparatus in a gaseous state, the non-condensing gas and pyrolytic coke are reburned for providing energy for pyrolysis and drying processes, the condensation gas is recovered as a pyrolysis solution, the pyrolysis solution is subjected to oil-water separation to obtain the pyrolysis oil and water-soluble liquid, the pyrolysis oil is used as the fuel oil, and the water-soluble liquid is used as a chemical raw material. The co-pyrolysis mode is employed for processing house refuse and forestry and agricultural residues, the self-sufficient heat energy problem required for pyrolysis of house refuse can be solved, synergism is generated during co-pyrolysis of house refuse and forestry and agricultural residues, the pyrolysis oil yield is increased, and synergism can generate good social benefit and economic benefit.

Description

technical field [0001] The invention belongs to the field of solid waste treatment and resource utilization, and relates to the co-pyrolysis technology of domestic waste and agricultural and forestry waste to prepare fuel oil. Background technique [0002] At present, my country's urban and rural domestic waste removal volume exceeds 200 million tons per year. With the rapid growth of urban domestic waste, how to deal with these wastes has attracted more and more attention. Traditional disposal methods such as landfill and compost are gradually restricted due to lack of land and environmental pollution. Incineration is an effective method to reduce the weight and volume of municipal solid waste, but it is easy to form harmful substances such as dioxins, which hinders its industrial application. Pyrolysis is an effective solid waste treatment method, which has potential advantages in producing alternative oil products and chemical raw materials. [0003] Compared with gener...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10B53/00C10B53/02C10G1/00
CPCY02E50/10
Inventor 舒新前贾晋炜徐精求鲁明元
Owner CHINA UNIV OF MINING & TECH (BEIJING)
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