Biomass circulating fluidized bed direct-fired boiler and system coupling same with gasifier for power generation and coproduction of activated carbon

Abstract

The invention discloses a biomass circulating fluidized bed direct-fired boiler and a system coupling the same with a gasifier for power generation and coproduction of activated carbon. The system comprises a gasifying and activating device, the biomass circulating fluidized bed direct-fired boiler and a steam turbine generator set, and the gasifying and activating device comprises a gasifying system and an activating system; a biomass raw material is fed into the gasifying system to generate cracked combustible gas and biomass charcoal, and the cracked combustible gas is fed into the biomasscirculating fluidized bed direct-fired boiler through fuel gas burning equipment and fed into a fluidized air chamber through a fuel gas nozzle for pre-burning to heat the biomass material; the biomass charcoal generated by the gasifying system through gasifying is fed into the activating system for activation to generate activated carbon to be sent out. The system can relieve the problem that existing biomass circulating fluidized bed direct-fired boilers are prone to bed material sintering and heated face ash accumulation and corrosion and the problem that the biomass raw material is low inenergy effective utilization rate, can effectively improve economic benefit of biomass power plants and is suitable for the biomass circulating fluidized bed direct-fired boiler.

Description

Technical field [0001] The invention belongs to the field of comprehensive utilization of biomass energy, and specifically relates to a biomass circulating fluidized bed direct-fired boiler and a system for generating activated carbon coupled with a gasifier for power generation and co-production. Background technique [0002] Biomass energy is a kind of renewable clean energy with abundant sources. It is second only to coal, oil and natural gas and ranks fourth in the world's total energy consumption. The development and utilization of biomass fuels has become a consensus in the world, and direct combustion is currently the most important way to utilize biomass resources in my country. [0003] At present, there are two main types of biomass burning boilers, one is a grate-type stratified boiler, and the other is a fluidized bed boiler. Due to the maturity of my country's circulating fluidized bed technology, the use of circulating fluidized bed technology to burn biomass fuel ha...

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Problems solved by technology

[0013] The main purpose of the present invention is to overcome the deficiencies in the prior art of biomass circulating fluidized bed direct-fired boilers, and provide a method that can alleviate the sintering of the existing biomass circulating fluidized bed direct-fired boiler bed material, ash on the heated area, corrosion, and biomass Low effective energy utilization rate of raw materials, etc., can effectively improve the economic benefits of biomass power plants, and is suitable for coupled power generation and co-production activated carbon systems for biomass circulating fluidized bed direct-fired boilers

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