Automatic high-efficient biomass granular fuel combustor

A technology of biomass pellets and burners, a kind of combustion equipment applied to boilers, in the field of automatic high-efficiency biomass pellet fuel burners, can solve the problems of thermal performance of combustion equipment, endangering the safety of combustion equipment, scaling and other problems, and achieve Novel structure, prevent slagging and improve combustion efficiency

Inactive Publication Date: 2010-08-04
ACADEMY OF PLANNING & DESIGNING OF THE MINIST OF AGRI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] At present, my country's briquette fuel is mainly based on crop straw, which contains a high content of inorganic elements, such as K, Na, Cl, S, Ca, Si, P, especially the high content of silicide, resulting in biomass solids Scaling and slagging occur in the process of thermochemical conversion and utilization of shaped fuel, which not only affects the thermal performance of combustion equipment, but also endangers the safety of combustion equipment
Therefore, foreign burners are difficult to use for straw-based biomass pellet fuel

Method used

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  • Automatic high-efficient biomass granular fuel combustor
  • Automatic high-efficient biomass granular fuel combustor
  • Automatic high-efficient biomass granular fuel combustor

Examples

Experimental program
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Effect test

Embodiment 1

[0046] Example 1: Automatic high-efficiency biomass pellet fuel burner for the worst slagging

[0047] For raw materials such as corn stalks and Korean pine that contain relatively high Si elements and other alkali metal elements, the Si content is basically 25%, and the K element content is 10% to 15%. After combustion, the slagging is the most serious and the ash content is the most. The slag-breaking and dust-cleaning mechanism with an angle between the side of the tooth 1 and the spiral section is 90°, that is, the section of the slag-breaking tooth perpendicular to the spiral, such as Image 6 , in this device, the angle between the side of the slag breaking tooth 1 and the spiral section is 90°, the contact surface between the slag breaking tooth 1 and the combustion inner cylinder is the largest, the slag breaking effect is the best, and the resistance of the spiral transmission is also relatively large, so the power It consumes a lot.

Embodiment 2

[0048] Example 2: Automatic high-efficiency biomass pellet fuel burner for severe slagging

[0049] In view of the fact that raw materials such as wheat straw and rice straw contain generally high Si elements and other alkali metal elements, and slagging is serious after combustion, a slag breaking and ash cleaning mechanism with an angle of 60° between the side of the slag breaking tooth 1 and the spiral section is used, such as Figure 7 , in this device, the angle between the side of the slag-breaking tooth 1 and the spiral section is 60°, the contact surface between the slag-breaking tooth 1 and the combustion inner cylinder is more, the slag-breaking effect is better, and the resistance of the spiral transmission is also small, so The power consumption is small, which is beneficial to the transmission of ash.

Embodiment 3

[0050] Embodiment 3: General automatic high-efficiency biomass pellet fuel burner for slagging

[0051] For cotton stalks, larch and other raw materials containing low Si elements and other alkali metal elements, less slagging and less ash after combustion, the slag breaking gear with an angle of 45° between the side of the slag breaking tooth 1 and the spiral section is adopted. Cleaning agencies, such as Figure 8 , in this device, the angle between the side of the slag-breaking tooth 1 and the spiral section is 45°, the contact surface between the slag-breaking tooth 1 and the combustion inner cylinder is small, and the slag-breaking effect is general, but the resistance of the spiral transmission is the smallest, so the power consumption Smaller, higher transmission speed of ash.

[0052] The automatic high-efficiency biomass pellet fuel burner of the present invention can be installed in various types of biomass boilers. During operation, the drop pipe 5 is connected to ...

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Abstract

The invention discloses an automatic high-efficient biomass granular fuel combustor, which belongs to the technical field of renewable energy sources. The technical scheme comprises a slag-breaking and ash-removing mechanism (2) and a combustion liner (3), the slag-breaking and ash-removing mechanism (2) which is connected with a motor (9) via a movable port (14) is mounted in the combustion liner (3), and consists of a fuel-pushing screw (11), a combustion stirring screw (12) and an ash-slag discharge screw (13), and different air inlets are arranged at three positions on the cylinder of the combustion liner (3), which correspond to the slag-breaking and ash-removing mechanism (2). The combustor effectively avoids the slagging phenomenon in the process of granular fuel combustion, realizes the granule conveying, stirring, slag breaking, ash removing and the like, increases the combustion efficiency, and is applicable to different types of granular fuels such as crop straws and forestry residues, and the invention provides a guarantee for the promotion of the development of the biomass pellet fuel industry in China.

Description

technical field [0001] The invention belongs to the technical field of renewable energy, and is an automatic high-efficiency biomass particle fuel burner, specifically a combustion device applied to boilers using biomass particles such as straw as raw materials as fuel, so as to realize automatic feeding , Automatic combustion, automatic slag breaking, automatic dust removal. Background technique [0002] Biomass solid briquettes refer to crop straws and forestry residues that are dried and crushed under certain temperature and pressure, and then extruded into solid fuels with a certain shape and high density. The volume is reduced by 6-8 times, and the density is 1.0-1.4t / m 3 , the energy density is equivalent to that of medium-quality bituminous coal, the firepower is long-lasting when used, the furnace temperature is high, and the combustion efficiency is good. It can be used not only for small biomass stoves or small boilers as cooking and heating fuel for rural reside...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F23B40/00F23J1/06
Inventor 田宜水赵立欣孟海波姚宗路孙丽英罗娟
Owner ACADEMY OF PLANNING & DESIGNING OF THE MINIST OF AGRI
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