On-line soot blowing method and on-line soot blowing device for coal water slurry boiler

A coal-water slurry and boiler technology, which is applied in the direction of combustion method, combustion product treatment, solid residue removal, etc., can solve the problems of difficult cleaning of boiler ash accumulation and high labor intensity of workers, so as to achieve low labor intensity of workers and clean ash Good effect and low investment cost

Inactive Publication Date: 2010-06-16
株洲市蓝宇热能科技研制有限公司
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  • Abstract
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  • Claims
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Problems solved by technology

[0007] The technical problem to be solved by the present invention is: Aiming at the problems that the existing coal-water slurry boiler is not easy to be cleaned when the boiler is in normal operation, the boiler needs to be shut down regularly for clea

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  • On-line soot blowing method and on-line soot blowing device for coal water slurry boiler
  • On-line soot blowing method and on-line soot blowing device for coal water slurry boiler

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Embodiment Construction

[0017] It can be seen from Fig. 1 that the present invention is an online soot blowing method for a coal-water slurry boiler. The method is to arrange a soot blowing device along the flue gas flow direction at the bottom of the convective heating surface of the coal-water slurry boiler. There are more than two nozzles with oblique upward outlets arranged in the gas flow direction. The soot blowing device can spray high-pressure steam or compressed air in sequence through the nozzles along the flue gas flow direction, and the interior of the heating surface of the boiler is divided in sequence by high-pressure steam or compressed air. The section is purged, and the large and coarse particles deposited in the flue gas channel of the boiler heating surface are forced to rise again due to the impact of the strong air flow, and at the same time collide with the metal wall of the heating surface, so that the dust adhering to the metal wall is caused by external force. The effect will...

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Abstract

The invention discloses an on-line soot blowing method and an on-line soot blowing device for a coal water slurry boiler. The bottom of a convection heating surface of the coal water slurry boiler is provided with a soot blowing device along the smoke circulating direction, the soot blowing device is provided with over two nozzles with oblique upward outlets along the smoke circulating direction, the soot blowing device can eject high-pressure steam or compressed air through the nozzles along the smoke circulating direction in turn, the high-pressure steam or the compressed air blows the inside of the heating surface of the boiler section by section in order and compels large granules deposited in a smoke passage of the heating surface of the boiler to elevate again due to the impact of strong airflow, and meanwhile the granules collide with the metal wall of the heating surface so that the dust adhered to the metal wall drops due to the action of an external force and is discharged along with the smoke together to achieve the soot blowing effect. The method and the device have the advantages of simple required equipment, low operating expense, high efficiency and low manpower intensity.

Description

technical field [0001] The invention relates to a boiler combustion method and a boiler structure, in particular to a method and a device for cleaning dust in a heating surface of a boiler when a coal-water slurry combustion boiler is burning. When the boiler burns, the dust cleaning method and device in the heating surface of the boiler can make the coal-water slurry burn continuously and stably for a long time in the boiler. Background technique [0002] Coal water slurry is a coal-based liquid fuel that is mixed with coal, water and additives. It has low ash and low sulfur, and is an environmentally friendly and clean fuel. The development of coal water slurry has always been a national key energy project, and the country has issued a number of related policies and documents. Therefore, coal water slurry and coal water slurry boilers have very broad prospects in our country. However, as a coal-based fuel, coal-water slurry contains a certain amount of ash. After combust...

Claims

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Application Information

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IPC IPC(8): F23J3/02
Inventor 陈楠许浦舟
Owner 株洲市蓝宇热能科技研制有限公司
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