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Coupled superfine biomass and coal-fired power generation system and method with flue gas drying and power feeding functions

A power generation system, biomass fuel technology, applied in the combustion method, dry gas arrangement, solid fuel combustion and other directions, can solve the problems of easy entanglement of fuel, unfavorable ignition and burnout, spontaneous combustion and even explosion, etc., to avoid the heating surface. The effect of coking, protecting the environment, improving reliability and safety

Pending Publication Date: 2019-05-24
HARBIN BOILER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, because biomass fuel contains a large amount of fiber components, if it is broken into small pieces of about 100mm, the fuel is easy to entangle and bridge, causing blockage of the conveying system, and the calorific value of biomass is low, and the larger size is not conducive to ignition and burnout
The volatile content of the combustible base of biomass fuel generally exceeds 75%. If the biomass is broken into fine powder particles below 5mm, it is easy to cause spontaneous combustion or even explosion during the transportation process, posing a huge safety hazard

Method used

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  • Coupled superfine biomass and coal-fired power generation system and method with flue gas drying and power feeding functions

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specific Embodiment approach 1

[0027] Specific implementation mode one: combine figure 1 Describe this embodiment, an ultrafine biomass and coal-fired coupled power generation system for flue gas drying and powder feeding in this embodiment, including a biomass particle preparation system, a biomass particle delivery system, and a biomass particle combustion and flue gas purification system The biomass particle preparation system is used to process and store the collected biomass raw materials; the biomass particle delivery system transports the formed ultrafine biomass fuel to the coal-fired boiler 19; the biomass particle combustion and flue gas purification system is used For the combustion of biomass particles and the purification of flue gas after combustion, the ultra-fine biomass fuel prepared by the biomass particle preparation system is transported to the coal-fired boiler 19 through the biomass particle delivery system, and part of the flue gas from the coal-fired boiler 19 is transported to The b...

specific Embodiment approach 2

[0028] Specific implementation mode two: combination figure 1 This embodiment is described. In this embodiment, an ultrafine biomass and coal-fired coupled power generation system for flue gas drying and powder feeding, the biomass particle preparation system includes a biomass crusher 1, a belt conveyor 2, Buffer silo 4, screw conveyor 5, flue gas dryer 6, ultrafine biomass pulverizer 7, rotary separator 8 and ultrafine biomass silo 9, both ends of belt conveyor 2 are respectively connected to biomass Crusher 1 and buffer silo 4, screw conveyor 5 is arranged under buffer silo 4, screw conveyor 5 is connected with buffer silo 4 and flue gas dryer 6, and flue gas dryer 6 is connected with ultrafine biomass Pulverizer 7, ultrafine biomass pulverizer 7 communicates with ultrafine biomass material bin 9 through rotary separator 8, and described biomass particle delivery system transports the ultrafine biomass fuel stored in ultrafine biomass material bin 9 to Inside the coal-fire...

specific Embodiment approach 3

[0030] Specific implementation mode three: combination figure 1 This embodiment is described. In this embodiment, an ultrafine biomass and coal-fired coupled power generation system for flue gas drying and powder feeding, the belt conveyor 2 is equipped with a magnetic drum 3 . So set, the material enters the buffer bin 4 after passing through the magnetic roller 3 at the outlet end of the belt conveyor 2 to remove the fine iron products doped in the material.

[0031] Specific implementation mode four: combination figure 1 Describe this embodiment, a flue gas drying and powder feeding ultrafine biomass and coal-fired coupled power generation system in this embodiment, the biomass particle conveying system includes a screw powder feeder 10 and a conical powder hopper 11, the screw The powder conveying machine 10 is connected with the superfine biomass material bin 9 and the conical powder hopper 11, and the screw powder conveying machine 10 transports the formed ultrafine bio...

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Abstract

The invention belongs to the technical field of coupled biomass and coal-fired power generation, relates to a coupled superfine biomass and coal-fired power generation system and method with flue gasdrying and power feeding functions, and is intended to solve the safety problems that, for instance, the coupled biomass gasification and coal-fired power generation technique has complex gasifier structure, high operation control difficulty, high input cost and valve blockage due to coke separation. The system herein comprises a biomass particle preparation system, a biomass particle conveyer system and a biomass particle combustion and flue gas purification system; superfine biomass fuel prepared by the biomass particle preparation system is conveyed into a coal-fired boiler via the biomassparticle conveyer system; part of the flue gas from the coal-fired boiler is delivered to the biomass particle preparation system for delivery and drying of the superfine biomass fuel, and the other part of the flue gas is used for heating air required by combustion of the fuel; the flue gas is discharged before passing through the flue gas purification system. The system and method herein are significant to the enhancement of enterprise economic benefit and surviving capacity.

Description

technical field [0001] The invention relates to a biomass and coal-fired coupled power generation system for flue gas drying and powder feeding, and belongs to the technical field of biomass and coal-fired coupled power generation. Background technique [0002] There are two main types of existing biomass combustion power generation technologies: one is biomass direct combustion power generation technology, that is, biomass is used as the only fuel, and water-cooled vibrating grate or circulating fluidized bed combustion is used to generate power; the other is biomass Gasification coal-fired coupled power generation technology, that is, the flue gas with combustible gas after biomass gasification is sent to a coal-fired boiler for coupled power generation. Biomass direct combustion power generation technology has problems such as high manufacturing cost, low power generation efficiency, poor fuel adaptability, coking on the heating surface, and corrosion; biomass gasificatio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10J3/46C10J3/72F23B40/00F23J15/02F23L15/00F26B21/14
CPCY02E20/34
Inventor 于强佟力于景泽
Owner HARBIN BOILER
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