Method for preparing bio-oil through supercritical pyrolysis of civil sludge

A municipal sludge and supercritical technology, applied in pyrolysis treatment sludge, preparation of liquid hydrocarbon mixture, petroleum industry, etc., can solve the problems of high disposal cost and complicated pretreatment, achieve high added value and avoid secondary Effects of pollution problems, good environment and economic benefits

Inactive Publication Date: 2013-02-06
TIANJIN UNIV
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Problems solved by technology

[0016] The purpose of the present invention is to provide a method for supercritical pyrolysis and liquefaction of municipal sludge to solve the problems of high disposal cost and

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  • Method for preparing bio-oil through supercritical pyrolysis of civil sludge

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Embodiment Construction

[0041] figure 1 It is a schematic structural diagram of the processing system of the method for preparing bio-oil by applying municipal sludge supercritical pyrolysis of the present invention. The reaction kettle of the processing system is a high-pressure reaction kettle 4, which is a sequence batch type high-pressure-resistant sealed reaction kettle; the front end of the high-pressure reaction kettle 4 is sequentially provided with a nitrogen storage tank 1, a booster pump 2 and a high-pressure gas storage tank 3. The high-pressure reaction kettle 4 is connected, and a valve and a pressure gauge are arranged on the connecting pipeline; The ends are respectively provided with a liquid collecting tank 8 and a gas collecting bag 9; the high pressure reaction kettle (4) is also provided with a kettle body rotating outlet 15, and the kettle body rotating outlet 15 is connected with the filter 10, the liquid separator 12 and the rotating outlet in turn. The evaporator 13 is conne...

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Abstract

The invention discloses a method for preparing bio-oil through supercritical pyrolysis of civil sludge. The method comprises the steps of: directly putting sludge from a factory into a high-pressure sealed reaction vessel, and repeatedly purging to achieve inert atmosphere by adopting nitrogen gas; enabling water in the sludge as a raw material in the reaction vessel to reach a supercritical state through temperature programming and pressurization by nitrogen gas, so as to realize pyrolytic reaction of the sludge in the supercritical water; and obtaining pyrolyzed bio-oil after vacuum filtration, liquid separation, extraction and rotary evaporation of a reaction product. A disposal system adopting the method ,mainly comprises a sequencing batch type high-pressure sealed reaction vessel, a booster pump, a condenser, a rotary evaporator, vacuum pump and the like. By adopting the invention, the links of drying and dewatering of sludge in the conventional oil-making technology through low-temperature sludge pyrolysis are avoided, the problem of use of a great amount of catalysts in direct liquefaction and oiling technologies of sludge are broken through, at the same time, the problem of secondary pollution of heavy metal is also avoided, and the bio-oil with high added value can be obtained.

Description

technical field [0001] The present invention relates to solid waste treatment, in particular to a method for preparing bio-oil by supercritical pyrolysis of municipal sludge. Background technique [0002] At present, sludge treatment methods mainly include agricultural use, landfill and incineration. With the gradual exposure of the drawbacks of traditional treatment methods, the utilization of sludge resources has been paid more and more attention. Among them, the pyrolysis and liquefaction technology of sludge has been well developed. Pyrolysis and liquefaction of organic waste is a resource utilization method, the main purpose is to obtain the liquid fuel with the highest yield and highest calorific value. Sewage sludge, like most organic wastes, contains a lot of volatile organic compounds, and the energy stored in the sludge can be released in the form of fuel through pyrolysis. It can be seen from the above discussion that the sludge pyrolysis and liquefaction technol...

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Application Information

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IPC IPC(8): C10G1/00C10B53/00C02F11/10
CPCY02W10/40
Inventor 陈冠益王艳马文超颜蓓蓓潘东晖樊军
Owner TIANJIN UNIV
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