Biomass circulating fluidized bed oxygen-enriched combustion system and method

A circulating fluidized bed and oxygen-enriched combustion technology, which is applied in the field of circulating fluidized beds, can solve the problems of bed loss and other problems, and achieve the effects of cooling, cost reduction, low investment and operation costs

Active Publication Date: 2021-06-22
NORTH CHINA ELECTRIC POWER UNIV (BAODING)
View PDF3 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to overcome the defect that the existing biomass circulating fluidized bed oxygen-enriched combustion easily causes bed material

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Biomass circulating fluidized bed oxygen-enriched combustion system and method

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0038] Example 1

[0039] Such as figure 1 As shown, the biomass feed unit 1 delivers the biomass material (specifically corn stalk) into the circulating fluidized bed lift tube 2 for oxygen-rich combustion (oxygen concentration is 25% -28%), and the combustion temperature is 750-770. ° C, produced in the flue gas CO 2The concentration of approximately 80% (dry smoke), the water vapor content is about 20%; the resulting flue gas carries high temperature bed (river sand) into the high temperature cyclone 3 to carry out gas separation, separation efficiency is 99%; separation The obtained high temperature cot is entered into the external oxidation heat exchanger 4 and the furnace re-circulation flue gas oxidation passage in the external oxidation heat exchanger 4 will be converated to flow, which will be located in the pipe. 2 Oxidation catalyst (specifically Fe 2 O 3 Heating to 650-700 ° C; separated flue gas sequentially flows through the high temperature superheater 5, low temper...

Example Embodiment

[0040] Example 2

[0041] Such as figure 1 As shown, the biomass feed unit 1 feeds the biomass raw material (specifically wood) into the circulating fluidized bed lift tube 2 to carry oxygen-rich combustion (oxygen concentration is 45% -48%), and the combustion temperature is 930-950 ° C. , Generated smoke CO 2 The concentration of approximately 80%, the water vapor content is about 20%; the resulting flue gas carrying high temperature bed (specifically river sand) into the high temperature cyclone 3, and the separation efficiency is 99%; separated high temperature The bedding enters the external oxidation heat exchanger 4 and the furnace re-circulation flue gas oxidation channel in the external oxidation heat exchanger 4 will be conversion heat, which will be located in the pipe. 2 Oxidation catalyst (specifically Fe 2 O 3 Heated to 550-640 ° C; separated flue gas sequentially flows through the high temperature superheater 5, the low temperature superheater 6, and the saving unit...

Example Embodiment

[0042] Example 3

[0043] Such as figure 1 As shown, the biomass feed unit 1 delivers the biomass raw material (specifically corn stalk) into the circulating fluidized bed lift tube 2 for oxygen-rich combustion (oxygen concentration is 40% -42%), and the combustion temperature is 820-850. ° C, produced in the flue gas CO 2 The concentration of approximately 80% or more (dry smoke), the water vapor content is about 20%; the resulting flue gas carries high temperature bed (specifically clay) into the high temperature cyclone 3, and the separation efficiency is 99%. The resulting high temperature sheet enters an external oxidation heat exchanger 4, and the furnace re-circulation flue gas oxidation passage in the external oxidation heat exchanger 4 will be converated to flow in the pipe. 2 Oxidation catalyst (specifically V 2 O 5 Heating to 450-460 ° C; separated flue gas sequentially flows through the high temperature superheater 5, the low temperature superheater 6, and the saving u...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention belongs to the technical field of circulating fluidized beds, and relates to a biomass circulating fluidized bed oxygen-enriched combustion system and method. The biomass circulating fluidized bed oxygen-enriched combustion system comprises a biomass feeding unit, a circulating fluidized bed lifting pipe, a high-temperature cyclone separator, an external oxidation heat exchanger, a flue gas waste heat recovery unit, a recirculation fan and a flue gas shunting unit. According to the biomass circulating fluidized bed oxygen-enriched combustion system and method, high-concentration SO2 in recycled flue gas generated by oxygen-enriched combustion is catalyzed into SO3 under the condition of no external heat supply, and KCl released in the biomass combustion process is sulfated into K2SO4 with a high melting point by using SO3, so that the reaction of KCl and SiO2 and the generation of low-melting-point potassium silicate are inhibited, and bed material particles are prevented from being agglomerated and bonded to inhibit bed layer flow losses. Meanwhile, a high-temperature circulating bed material generated by oxygen-enriched combustion is used for providing heat for catalytic oxidation of SO2 in the recycled flue gas, so that efficient catalysis of SO2 without external heat supply is achieved.

Description

technical field [0001] The invention belongs to the technical field of circulating fluidized beds, and in particular relates to a biomass circulating fluidized bed oxygen-enriched combustion system and method. Background technique [0002] In response to global warming, China has 2 The goal set on emissions is to strive to reach the peak before 2030, and strive to achieve carbon neutrality before 2060 (hereinafter referred to as the "3060" carbon goal). Carbon capture, utilization and storage (CCUS), as one of the important strategic technologies for my country's low-carbon energy development, is crucial to achieving the "3060" carbon target. Biomass energy coupled with CCUS technology can not only use "carbon-neutral" biomass to cleanly generate electricity, but also use CCUS to reduce the CO released by biomass combustion. 2 Capturing and promoting "negative carbon emissions" throughout the life cycle is an important technical approach for my country to achieve the "3060...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): F23C10/08F23C10/24F23C10/22F23C10/18
CPCF23C10/08F23C10/24F23C10/22F23C10/18Y02E20/34
Inventor 徐明新陆强张平新刘子树吴亚昌
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap