Circulating fluidized bed reactor for preparing hydrogen by gasifying biomass

Abstract

The invention provides a circulating fluidized bed reactor for preparing hydrogen by gasifying biomass. The reactor comprises a reactor shell, a cyclone dust collector and a material returning device, wherein the reactor shell consists of a reactor upper shell, a cylindrical furnace lining and a reactor lower shell, the top part of the reactor upper shell is connected with the cyclone dust collector, the lower end of the reactor upper shell is provided with a biomass charging port, and the bottom part of reactor upper shell is muff coupled with the cylindrical furnace lining; an induction heating device is suspended in the cylindrical furnace lining, and an electric induction coil is wound outside the cylindrical furnace lining and connected with a heating power supply; the bottom part of the cylindrical furnace lining is muff coupled with the reactor lower shell, air distributors are arranged in the reactor lower shell, the bottom part of the reactor lower shell is provided with a vapor charging port, and a material returning port is arranged above the air distributors; and the bottom part of the cyclone dust collector is connected with the material returning device, the material returning device is connected with the material returning port, and the bottom part of the material returning device is provided with a material returning vapor charging port. The circulating fluidized bed reactor has the advantages of uniform heating, energy conservation and environmental protection, continuous operation, simple structure and the like, and can produce the hydrogen-enriched synthetic gas by pyrolysis of biomass materials such as stalks, rice hulls and sawdust.

Description

technical field [0001] The invention belongs to the technical field of renewable energy, and relates to a biomass hydrogen production reactor, in particular to a circulating fluidized bed reactor for producing hydrogen-rich synthesis gas from biomass. Background technique [0002] my country is a large agricultural country with abundant biomass resources. Traditional treatment methods (cooking, field burning, and open-air accumulation) not only result in low-efficiency utilization of biomass resources, but also pollute the environment. The in-depth development and utilization of biomass energy such as straw, rice husk, and sawdust, which are rich in renewable resources in rural areas, is an inevitable trend in the future development of the energy industry and the only way to promote sustainable social development. [0003] Biomass gasification to produce fuel gas (hydrogen-rich syngas) is one of the effective methods for the development and utilization of biomass energy. Wh...

AI Technical Summary

Problems solved by technology

At present, the common heating method is mostly the traditional resistance wire external heating method. Its disadvantage is that repeated heating will easily cause the resistance wire to be brittle, reduce the service life of the heating device, take a long time to heat up, and have low heating efficiency.

[0004] The Chinese patent application with the application number 200710022295.2 and titled "Double Fixed-Bed Biomass Reactor System with Heat Pipe Heating" discloses a double fixed-bed biomass reactor with heat pipe heating. The reactor uses two fixed beds as gas The gasification reactor or reaction chamber uses the working medium in the closed heat pipe as the heat carrier to indirectly provide the reaction heat required for the gasification reaction of biomass and water vapor. However, the structure of the device is complex, especially the sealing requirements are high. If Leakage of individual heat pipe components will affect the overall operation of the system

[0005] The Chinese patent application with application number 200910116483.0 and titled "Internal Combustion Heating Rotating Cone Biomass Gasifier" discloses a rotating cone biomass gasification reactor, which consists of two concentric cones inside and outside, and the inner cone does not move , the outer cone rotates around the shaft, and the inner bearing supporting the extension shaft must be able to work for a long time under high temperature and high dust conditions. In addition, this reactor requires inert heat carriers such as sand to move intermittently between the two cones. The wear of the high-temperature wall is quite serious, so it has the disadvantages of complex structure, high cost, and short service life.

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