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Cinder breaking device for biomass boiler

A biomass boiler and slag breaking technology, which is applied to lighting and heating equipment, etc., can solve the problems of slagging, high content, and difficult to discharge slagging of biomass pellet fuel, and achieve the effect of improving service life.

Inactive Publication Date: 2015-02-11
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

[0006] The purpose of the present invention is to provide a biomass boiler slagging device, which can be installed in the furnace of the biomass boiler to solve the problem that the slagging of biomass pellet fuel is difficult to discharge
At the same time, the invention solves the problems of slagging due to the high content of alkali metals and silicides contained in the fuel itself, which affects the normal combustion of the boiler and causes heat loss and low combustion efficiency during the combustion thermochemical conversion process of the biomass pellet fuel.

Method used

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  • Cinder breaking device for biomass boiler
  • Cinder breaking device for biomass boiler
  • Cinder breaking device for biomass boiler

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Example 1: Biomass boiler slag breaking device for corn stalk pellet fuel

[0025] The particle density of corn stalk pellet fuel is 1.2g / cm 3 , the highest ash content is 18.45%, the low calorific value is 13.01MJ / kg, and the softening temperature is 1167°C. The ash slag contains high Si and other alkali metal elements, Si content is 28%, and K content is 9%.

[0026] The corn stalk pellet fuel was burned in a biomass boiler without a slagging device. The slagging rate of the bottom ash was 48.94%. A small amount of coked ash on the grate chain is bonded to the grate; the corn stalk pellet fuel is placed in the biomass boiler equipped with a slag breaking device of the present invention for combustion, and the ash is found to be in small pieces after combustion, and the slag The maximum size of the block is 17.3mm, and only a small amount of ash remains on the grate chain, which shows that the biomass boiler slag breaking device can not only break the ash, but also pr...

Embodiment 2

[0027] Example 2: Biomass boiler slag breaking device for corn stalk pellet fuel containing additives

[0028] The corn stalk pellets containing additives were burned in a biomass boiler without a slagging device, and the slagging after combustion was serious. The slagging rate of the bottom ash was 26.17%. The slag was larger and harder than the straw pellets without additives. The fuel slag block is small, and the maximum size of the slag block is 32.5mm. It is observed that a small amount of coked ash sticks on the fire grate chain; Combustion in the biomass boiler, after combustion, it was found that the size of the ash and slag block became smaller, and the maximum size of the slag block was 15.2mm. It was observed that only a small amount of ash remained on the grate chain, which indicated that the biomass boiler slag breaking device could not only break the ash and slag. , and it can prevent the ash from sticking on the chain grate, and the effects of slag breaking and ...

Embodiment 3

[0029] Embodiment 3: Biomass boiler slag breaking device for wood pellet fuel

[0030] Wood pellet fuel particle density 1.18g / cm 3 , the highest ash content is 1.01%, the low calorific value is 16.83MJ / kg, the softening temperature is 1332°C, the Si content in the ash is 10%, and the K element content is 4%.

[0031] The wood pellet fuel is burned in a biomass boiler without a slagging device. The slagging rate after combustion is not serious, and the bottom ash slagging rate is 0. It is observed that there is only a small amount of ash on the grate chain; the wood pellet fuel is placed in the Combustion in a biomass boiler equipped with a slagging device of the present invention is basically the same as that of a biomass boiler without a slagging device after combustion, and the effects of slag breaking and slag removal in the implementation examples are not obvious, indicating that for wood pellet fuels with low ash content, It is not necessary to increase the slag breakin...

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Abstract

The invention discloses a cinder breaking device for a biomass boiler, belongs to the technical field of solid fuel burning, is applied to biomass boilers for burning of biomass granular fuel, and actively breaks and burns clinker. The device is installed in the hearth of the biomass boiler, and comprises a water inlet pipe, a water outlet pipe, cinder breaking teeth and a cooling water pipe, is horizontally placed in the hearth of the biomass boiler, and is perpendicular to a chain fire grate; the distance between the device and the fire grate is smaller than 5 mm; burning fuel and cinder move with the movement of the chain fire grate; the burnt coked cinder is broken through the cinder breaking device and then discharged. The cinder breaking device solves the problem that the cinder of biomass granular fuel is coked after being burnt, can greatly improve the efficiency and prolong the service life of the biomass boiler, and facilities promotion of the industrialization effect of straw biomass granular fuel, the coal is replaced with biomass granular fuel, and the cinder breaking device has good economic, social and environmental benefits.

Description

technical field [0001] The invention relates to a biomass boiler slag breaking device, which belongs to the technical field of solid fuel combustion and is suitable for biomass boilers that burn biomass particle fuels, specifically, it is installed in the furnace of a biomass boiler to facilitate the discharge of combustion ash. It is used to solve the problem that the burning slagging of biomass pellet fuel is difficult to discharge. Background technique [0002] Biomass pellet fuel is efficient, clean, easy to ignite, CO 2 With the advantages of nearly zero emission, it can replace fossil fuels such as coal and be used in civil fields such as cooking and heating, as well as industrial fields such as boiler combustion and power generation. The density of biomass pellet fuel is 1.0~1.4t / m 3 , the energy density is equivalent to medium bituminous coal, the firepower is long-lasting when used, and the furnace temperature is high. It is a good alternative fuel for coal at pre...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F23J1/06
Inventor 赵立欣霍丽丽田宜水孟海波姚宗路袁艳文丛宏斌
Owner ACADEMY OF PLANNING & DESIGNING OF THE MINIST OF AGRI
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