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Biological mass-energy fuel boiler and its burning method

A technology of biomass energy and combustion method, which is applied to boilers burning biomass fuel and its combustion field, and can solve problems such as high cost and difficulty in realizing comprehensive utilization of ash and slag

Inactive Publication Date: 2007-01-24
上海四方锅炉厂
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  • Abstract
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Problems solved by technology

[0002] At present, the development and application of biomass energy has attracted widespread attention. There are two main types of combustion technologies for biomass fuel: one is to co-fire biomass fuel and coal in the form of circulating fluidized bed, The proportion is about 20%, and it is difficult to realize the comprehensive utilization of ash; the other is to use the water-cooled reciprocating grate layer combustion method, and the cost of the whole system is high

Method used

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  • Biological mass-energy fuel boiler and its burning method

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Embodiment Construction

[0011] Such as figure 1 As shown, the boiler used in the present invention adopts a natural circulation form with a drum 1 . Furnace 2 adopts membrane water wall structure. The evaporating heating surface 4 and the superheater 5 are arranged in the flue 3, the evaporating heating surface 4 adopts the layout form of a flag-type heating surface, and the superheater 5 adopts the form of a serpentine tube. There is an economizer 6 and an air preheater 7 in the tail flue, the economizer 6 is in the form of a smooth tube serpentine tube, and the air preheater 7 is in the form of a horizontal bare tube.

[0012] Fire grate 8 adopts scale-type chain grate and equal-pressure air chamber. The primary air of the boiler enters the furnace 2 after being regulated by several groups of small dampers distributed along the length of the grate. and the demands of the embers.

[0013] Each blanking port 9 is angle-adjustable, and below it is a secondary air duct 10. Its function is: (1) use w...

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Abstract

Characters of the invention are that suspension burning plus grate firing carry out in boiler; first, through conveying facilities, biomass energy fuel in sheet, granular or powder is fed equably through feed inlets with adjustable angles; next, secondary air under feed inlets sends fuel to fire box, and suspension burning is carried out in fire box under cooperation of primary air; then, based on burning properties and state to adjust primary / secondary air in order to guarantee high temperature in burning area, and prolong residence time of combustible and flue gas in high temperature; finally, in suspension burning, bigger fuel granules drop to fire grate to carry out grate firing, and adjusting angles of feed inlets and secondary air to make thickness of fuel layer even on fire grate, and adjusting primary air to ensure full burning. The invention strengthens burning and guarantees firing in time and full burning so as to realize clean burning biomass energy fuel.

Description

technical field [0001] The invention relates to a combustion method of a boiler, in particular to a boiler burning biomass fuel and a combustion method thereof. Background technique [0002] At present, the development and application of biomass energy has attracted widespread attention. There are two main types of combustion technologies for biomass fuel: one is to co-fire biomass fuel and coal in the form of circulating fluidized bed, The proportion is about 20%, and it is difficult to realize the comprehensive utilization of ash and slag; the other type is the layer combustion method of water-cooled reciprocating grate, and the cost of the whole system is high. content of the invention [0003] The purpose of the present invention is to provide an environmentally friendly and energy-saving biomass fuel boiler and its combustion method, which can not only ensure timely ignition and burning of biomass fuel, realize efficient and clean combustion of biomass fuel, but also ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F23B90/00F23L3/00F23B90/04
Inventor 白兆兴曹建峰陈红娟吴晓云吴元琦朱振声丁奇蔡晓锋
Owner 上海四方锅炉厂
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