A Coupling System of Biomass Fast Pyrolysis and Coal-fired Boiler

Abstract

The invention discloses a biomass rapid pyrolysis and coal-fired boiler coupling system.The biomass rapid pyrolysis and coal-fired boiler coupling system comprises biomass rapid pyrolysis equipment, bio-oil reforming separation equipment, crude oil refining equipment and coal-fired boiler equipment.The biomass rapid pyrolysis equipment is used for conducting rapid pyrolysis on biomass to generate liquid bio-oil and a small quantity of non-condensing gas products and solid carbonic ash.The liquid bio-mass reforming separation equipment is used for conducting chemical and physical separation on the liquid bio-mass to obtain liquid bio-crude oil and solid biochar.The crude oil refining equipment is used for refining the liquid bio-crude oil to prepare chemical materials or high-calorific-value energy products.The coal-fired boiler equipment is used for achieving energy utilization of the solid carbonic ash, the non-condensing gas products and the solid biochar.Biomass bio-oil efficient preparation and a coal-fired boiler are organically coupled, complementary utilization of high energy and low energy is achieved, and gradient utilization of biomass resources and energy is achieved.

Description

technical field [0001] The invention belongs to the field of energy utilization, and more specifically relates to a coupling system for fast pyrolysis of biomass and a coal-fired boiler. Background technique [0002] Biomass pyrolysis technology refers to the degradation of biomass under the condition of no oxygen or low oxygen. When it is rapidly pyrolyzed at medium temperature, the main product is bio-oil, and a small amount of CO, CO 2 、CH 4 and H 2 Wait. [0003] One of the current industrial utilization of biomass is to use the bio-oil and coal produced by biomass pyrolysis for co-combustion to generate electricity. However, the utilization of bio-oil has the following problems: First, bio-oil has a large oxygen content, which is prone to chemical reactions during storage, which hinders the utilization of bio-oil, and due to the high oxygen content, its calorific value is low , which severely limits the blending ratio of bio-oil, and blending will greatly reduce boi...

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Problems solved by technology

However, the utilization of bio-oil has the following problems: First, bio-oil has a large oxygen content, which is prone to chemical reactions during storage, which hinders the utilization of bio-oil, and due to the high oxygen content, its calorific value is low , which severely limits the blending ratio of bio-oil, and blending will greatly reduce boiler efficiency; secondly, the bio-oil obtained from pyrolysis has a large ash content, and the blending process will seriously reduce boiler efficiency and cause slagging on the heating surface of the boiler and corrosion; thirdly, the co-combustion of liquid bio-oil and coal requires the transformation of the original power plant system and the design of dual-fuel pipelines, which is costly

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