A biomass pyrolysis production process with a multi-chamber fluidized bed reactor as the core

A fluidized bed reactor and biomass thermal cracking technology, which is applied in the fields of biofuels, petroleum industry, liquid hydrocarbon mixture preparation, etc. It can reduce the large-scale back-mixing phenomenon, improve the residence time distribution, and achieve the effect of continuous production capacity.

Active Publication Date: 2021-08-03
QINGDAO UNIV OF SCI & TECH
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Problems solved by technology

The main problems in the current process are low processing capacity, small production capacity, difficult control of rapid cracking conditions, low thermal energy utilization rate, and great impact on yield

Method used

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  • A biomass pyrolysis production process with a multi-chamber fluidized bed reactor as the core
  • A biomass pyrolysis production process with a multi-chamber fluidized bed reactor as the core
  • A biomass pyrolysis production process with a multi-chamber fluidized bed reactor as the core

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Embodiment

[0026] Continuous fast pyrolysis of wood pellets using a multi-chamber fluidized bed reactor. Wood pellets are continuously fed into the multi-chamber fluidized bed reactor by a screw feeder, where they are fluidized and rapidly pyrolyzed in the first three chambers. After the cracking is completed, the remaining solid residue is continuously drawn out of the reactor from the star unloader at the bottom of the unloading chamber. The generated pyrolysis gas is carried by the fluidization gas to quickly move out of the reactor and enter the subsequent gas-solid separation system and condensation system, effectively avoiding secondary cracking. The deflector at the opening is conducive to the sequential one-way flow of wood chips between adjacent chambers, and effectively inhibits the back-mixing of particles in the reactor. The multi-compartment structure makes the cracking process of wood chips artificially divided into three stages, improves the residence time distribution of...

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Abstract

The invention relates to a biomass thermal cracking production process with a multi-compartment fluidized bed reactor as the core, including a feeding device, a thermal cracking reactor, and a cyclone separator connected sequentially through pipelines, and the thermal cracking reactor adopts a multi-compartment The chamber fluidized bed reactor and the cyclone separator are respectively connected to the carbon collection device and the bio-oil collection device through pipelines, and the gas separated by the cyclone separator is sent to the reactor combustion chamber through the pipeline through the induced draft fan. The invention uses the non-condensable gas generated in the process as a heating heat source, does not need any fossil fuel, belongs to the self-heating type, and can save production costs; the temperature of the reactor can be controlled by adjusting the mixed gas volume of the non-condensable gas and air, and the production can be effectively adjusted. Substance thermal cracking product distribution and target product yield; with continuous production capacity, stable equipment operation, the entire process does not emit any pollutants, environmentally friendly and economical.

Description

technical field [0001] The invention belongs to the technical field of energy and chemical industry, and relates to a biomass pyrolysis production process with a multi-chamber fluidized bed reactor as the core. Background technique [0002] Facing the energy crisis, biomass, as the only renewable resource that can be converted into conventional liquid petroleum fuels and other chemicals, its development and utilization is a major topic of widespread concern at home and abroad. At present, the research on biomass conversion and utilization mainly focuses on thermochemical conversion, among which biomass pyrolysis liquefaction technology is one of the important ways of its utilization. This technology can largely alleviate the energy crisis and environmental pollution in today's society. It is an effective way for human beings to develop renewable resources. [0003] Biomass pyrolysis refers to the process in which biomass is pyrolyzed under the condition of complete anoxic o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10B53/02C10G1/00
CPCC10B53/02C10G1/00Y02E50/10
Inventor 段继海王伟文方乐陈光辉李建隆张自生
Owner QINGDAO UNIV OF SCI & TECH
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