Method for preparing biological oil through vacuum pyrolysis of biomasses

A biomass and bio-oil technology, which is used in the preparation of liquid hydrocarbon mixtures, biofuels, and petroleum industries, can solve the problems of difficult separation of cracked oil, increase the heat transfer efficiency of the reactor, and improve the condensation effect and ease the energy shortage. , the effect of reducing the reaction time

Inactive Publication Date: 2012-07-04
SOUTHEAST UNIV
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Problems solved by technology

[0004] Technical problem: The purpose of the method of the present invention is to provide a method for preparing bio-oil by vacuum cracking of biomass, which can improve the condensation effect of volatile components and realize online sampling of samples. At the same time, it can increase the heat transfer efficiency in the reactor and properly reduce the oil phase The content of water in the medium partly solves the problem of difficult subsequent separation of pyrolysis oil

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  • Method for preparing biological oil through vacuum pyrolysis of biomasses
  • Method for preparing biological oil through vacuum pyrolysis of biomasses
  • Method for preparing biological oil through vacuum pyrolysis of biomasses

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Embodiment

[0027] Such as figure 1 As shown, the plant diagram of the inventive method includes an interconnected reaction system, a condensation system and a pump system. The reaction system includes a stainless steel reaction kettle 3, a tube furnace 4, and a temperature controller 26. There are interfaces on the flange surface of the reaction kettle, which are respectively connected to the vacuum gauge 7, the blind pipe 5, the first branch L1 and the second branch L2 , The reaction kettle condensation system includes three-stage condensation. The first two-stage condensation tanks are respectively equipped with water and ice-water mixtures. The condensation tank and the stainless steel elbow are welded as one. 9. A collector is connected to the outlet of the stainless steel elbow. The third-stage condensation The tank is ice-salt mixture. The pump system includes an absorber 17 , a drying tower 18 , a buffer bottle 21 , a vacuum pump 20 and a compression pump 22 . A three-way valve ...

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Abstract

The invention relates to a method for preparing biological oil through vacuum pyrolysis of biomasses, which comprises the following technological processes: (1) vacuum pyrolysis: adding raw materials after pretreatment into a reaction kettle, and heating a peripheral pipe type furnace to raise the temperature for pyrolysis, wherein a heat conducting device is arranged in the reaction kettle; (2) condensation: introducing volatile components (mainly comprising water vapor) at a low temperature into a drying tower, and guiding the volatile components at a high temperature into a coil condenser for condensation, wherein the online sampling can be achieved in the process of the pyrolysis; and (3) absorption: absorbing the water vapor in incondensable gas by the drying tower and absorbing nitride and sulfide by a bubbling absorption bottle so as to effectively reduce the pollution caused by vacuum pump oil. The method partially solves the problem of temperature rise hysteresis caused by the low heat transfer efficiency of the biomasses in the process of the temperature rise and the problem of low condensation efficiency and the online sampling, and simultaneously the method preliminarily reduces the water content in the biological oil.

Description

technical field [0001] The invention discloses a method for recovering biomass solid waste, in particular to a method for producing bio-oil by pyrolysis under a certain degree of vacuum. Background technique [0002] With the increasing scarcity of fossil energy, biomass energy has begun to attract attention due to its low toxicity, low pollution and abundant reserves. [0003] Biomass thermochemical conversion technology is a kind of biomass energy utilization technology, in which vacuum cracking is a technology with liquid phase bio-oil as the main target product, which converts biomass raw materials into non-condensable gas under a certain degree of vacuum and temperature , three energy forms of bio-oil and coke. Biomass is first converted into volatile matter at high temperature, and the volatile matter is converted into bio-oil and non-condensable gas after passing through the condensing device. The composition of volatile matter is similar to flue gas, and the common...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G1/00C10B53/02
CPCY02E50/14Y02E50/10
Inventor 肖国民刘楠王恋
Owner SOUTHEAST UNIV
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