Methods and systems for pyrolyzing biomass

Abstract

The invention discloses a method and a system for pyrolyzing biomass. The method comprises the following steps: (1) mixing the biomass with a catalyst to obtain a mixture; (2) pyrolyzing the mixture in a mobile bed pyrolysis reactor for pyrolysis to obtain an oil-gas mixture and a solid pyrolysis product containing charcoal and an inactived catalyst; (3) cooling the oil-gas mixture; (4) combusting the solid pyrolysis product containing charcoal and the inactived catalyst, so as to obtain heating flue gas and a solid product containing both hot ash and a regenerated catalyst; (5) returning the heating flue gas into a radiation heating pipe of the mobile bed pyrolysis reactor related in the step (2); (6) separating hot ash and the regenerated catalyst which are contained by the solid product, and returning the regenerated catalyst into the step (1). The method can be used for realizing catalytic pyrolysis of the biomass with high pyrolysis efficiency and uniform heating efficiency; moreover, the problem that the catalyst consumption in the catalytic pyrolysis of the biomass is high in the prior art can be solved.

Description

technical field

[0001] The invention belongs to the field of chemical industry, in particular, the invention relates to a method and system for pyrolyzing biomass. Background technique

[0002] As people's demand for energy increases day by day, the fuel used as the main energy source decreases rapidly. Therefore, searching for a renewable and environmentally friendly energy source has become the focus of widespread concern in society. Among all kinds of renewable energy, biomass is unique. It can not only store solar energy, but also a renewable carbon source, which can be converted into conventional solid, liquid and gaseous fuels. The effective use of biomass energy can not only reduce The use of fossil fuels can also curb carbon dioxide emissions. The effective use of biomass energy technology began in the late 1970s, mainly using thermochemical conversion and biological conversion technology to convert biomass into gas, liquid and solid energy products and chemicals. ...

Examples

Embodiment

[0106] refer to Figure 12 As shown, the pine sawdust raw material (V ad =73.88%, Q net，ar =18.41MJ / kg) stored in the raw material bin 1, transported to the drying bin 2 by belt transmission for drying treatment, reducing the moisture content in the pine wood chips, and then transported to the biomass and catalyst mixed feeding device through the biomass feeding device 3 5 is mixed with the catalyst and sent to the moving bed pyrolysis reactor 6, and the radiant heating tube 18 on the moving bed pyrolysis reactor is used to radiate and heat the mixed material to cause catalytic pyrolysis reaction (500-750°C), and the oil gas produced The mixture (500-600°C) enters the high-temperature dust collector 7 through the top pipe of the reactor for particle dust removal, and then enters the oil-gas cooler 8 to cool down. After separation, biomass oil and pyrolysis gas are obtained respectively, and the pyrolysis gas then enters the pyrolysis gas for purification The net pyrolysis ga...

technical field

[0001] The invention belongs to the field of chemical industry, in particular, the invention relates to a method and system for pyrolyzing biomass. Background technique

[0002] As people's demand for energy increases day by day, the fuel used as the main energy source decreases rapidly. Therefore, searching for a renewable and environmentally friendly energy source has become the focus of widespread concern in society. Among all kinds of renewable energy, biomass is unique. It can not only store solar energy, but also a renewable carbon source, which can be converted into conventional solid, liquid and gaseous fuels. The effective use of biomass energy can not only reduce The use of fossil fuels can also curb carbon dioxide emissions. The effective use of biomass energy technology began in the late 1970s, mainly using thermochemical conversion and biological conversion technology to convert biomass into gas, liquid and solid energy products and chemicals. ...

Examples

Embodiment

[0106] refer to Figure 12 As shown, the pine sawdust raw material (V ad =73.88%, Q net，ar =18.41MJ / kg) stored in the raw material bin 1, transported to the drying bin 2 by belt transmission for drying treatment, reducing the moisture content in the pine wood chips, and then transported to the biomass and catalyst mixed feeding device through the biomass feeding device 3 5 is mixed with the catalyst and sent to the moving bed pyrolysis reactor 6, and the radiant heating tube 18 on the moving bed pyrolysis reactor is used to radiate and heat the mixed material to cause catalytic pyrolysis reaction (500-750°C), and the oil gas produced The mixture (500-600°C) enters the high-temperature dust collector 7 through the top pipe of the reactor for particle dust removal, and then enters the oil-gas cooler 8 to cool down. After separation, biomass oil and pyrolysis gas are obtained respectively, and the pyrolysis gas then enters the pyrolysis gas for purification The net pyrolysis ga...

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