Method and device for on-line catalytic pyrolysis fine purification of biomass

A technology of catalytic cracking and biomass oil, which is applied in catalytic cracking, cracking, petroleum industry, etc., can solve the problems of affecting fast cracking reaction, reducing liquid yield, reducing liquid yield, etc., and achieves the effect of weakening pyrolysis and condensation reaction Impact, reduce energy consumption and investment and operation costs, and improve the effect of liquid production rate

Inactive Publication Date: 2008-05-07
EAST CHINA UNIV OF SCI & TECH
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Problems solved by technology

However, its solid product is still in the fast cracking reactor, and as time goes on, the solid product staying in the medium will not be conducive to heat transfer and affect the fast cracking reaction; the solid product suspended in the bed will accelerate the cracking product to carry out secondary secondary cracking; at the same time, the inorganic salts in the solid product are helpful to the gasification reaction of biomass, which will lead to an increase in the gas product, thereby reducing the liquid yield; in addition, if the solid product accumulates on the catalytic cracking reactor, it will increase System resistance, increase residence time of cleavage products, increase secondary cleavage reactions, reduce liquid yield

Method used

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  • Method and device for on-line catalytic pyrolysis fine purification of biomass

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～5

[0026]See Fig. 1, the device for refining biomass oil on-line catalytic cracking of the present invention comprises a hopper 2 connected in sequence, a screw feeder 3, an atmospheric pressure bubbling fluidized bed gasifier 4, a cyclone separator 6, a downward fixed atmospheric pressure bed reactor 8, a primary condenser 9 and a secondary condenser 10, and a nitrogen cylinder 1 connected to the top of the hopper 2 and the bottom of the normal pressure bubbling fluidized bed gasifier 4; wherein the normal pressure bubbling fluidized bed A gas distribution plate 5 is also provided at the middle and lower part of the gasifier 4, and an ash hopper 7 is provided below the cyclone separator 6. In addition, a gas flow meter 11 with a regulating valve is provided on the passage connecting the nitrogen cylinder 1 with the hopper 2 and the atmospheric pressure bubbling fluidized bed gasifier 4, and on the exhaust pipeline at the rear end of the second condenser 10 , so as to control the...

Embodiment 6～10

[0041] Fix the catalytic cracking temperature at 500°C and change the mass space velocity from 0.5 to 7.0h -1 , other process conditions are consistent with Embodiment 1~5.

[0042] The fast cleavage product yield is consistent with Examples 1-5.

[0043] The product yield after online catalytic cracking, and its conversion into yield using bio-oil as raw material are shown in Table 4.

[0044] Table 4. The effect of space velocity on the yield of online catalytic cracking products

[0045] implement

[0046] It can be seen that the liquid yield of the present invention is obviously higher than that of off-line catalytic cracking, and the coking rate is also significantly lower than that of off-line catalytic cracking.

[0047] The biomass oil under the condition of the highest liquid yield in the above examples was analyzed for hydrocarbon elements, and the oxygen content was calculated by the subtraction method, and the results are shown in Table 5. It can be se...

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Abstract

The invention discloses a refining method and a device for online catalytic cracking of bio-oil. The technical proposal of the method is that: the biomass materials are fast paralyzed; catalytic cracking are directly performed to the acquired product in the form of gas, and then the bio-oil is acquired by condensation, wherein the product after the fast paralysis is catalyzed and paralyzed after solid particles are removed by gas-solid separation. Therefore, the fast cracking reactor and the catalytic cracking reactor in prior fast cracking units are connected into one body in present invention, and a gas-solid separation device is arranged in between. The invention has the advantages of reducing energy consumption and investment operating cost, and obviously displaying excellences of biomass energy.

Description

technical field [0001] The invention relates to the field of biomass energy, in particular to a method for on-line catalytic cracking and refining of biomass oil and a device used. Background technique [0002] With the development of the economy, the global energy demand is increasing year by year. The overexploitation of limited resources such as coal, oil and natural gas, which are the main raw materials for fuel and organic chemical products, has made the energy problem more and more severe. As a clean and renewable energy source, the effective utilization of biomass energy has attracted widespread attention. [0003] Biomass can be prepared by various pyrolysis methods, such as rapid pyrolysis, vacuum pyrolysis, microwave pyrolysis, etc. to prepare liquid fuel—biomass oil. Among them, rapid pyrolysis technology has attracted people's attention because of its broad industrialization prospects, and has become a major source of biomass energy utilization and development. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G11/18C10G11/00
Inventor 颜涌捷李洪宇张素平徐庆利孙多志
Owner EAST CHINA UNIV OF SCI & TECH
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