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Chain furnace system and chain furnace combustion method

A combustion method and chain furnace technology, applied in the field of chain furnaces, can solve problems such as the inability of the chain furnace to ensure the burnout rate, and achieve the effects of enhancing combustion sufficiency, improving the burnout rate, and increasing the level of combustion temperature.

Active Publication Date: 2019-05-21
YANTAI LONGYUAN POWER TECH
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Problems solved by technology

[0005] A technical problem to be solved by the present invention is: the existing chain furnace cannot maintain low NO x emissions while maintaining burnout rates

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  • Chain furnace system and chain furnace combustion method
  • Chain furnace system and chain furnace combustion method
  • Chain furnace system and chain furnace combustion method

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Embodiment Construction

[0041] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. The following description of at least one exemplary embodiment is merely illustrative in nature and in no way taken as limiting the invention, its application or uses. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative work fall within the protection scope of the present invention.

[0042] Techniques, methods and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, such techniques, methods and devices should be considered part of the Authorized Specification.

[0043]In the description of the present invention, it shoul...

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Abstract

The invention relates to the technical field of chain furnaces, in particular to a chain furnace system and a combustion method of a chain furnace. The chain furnace system comprises a combustion chamber, a chain grate, a tail flue, a flue gas recirculating device and a pulverized coal combustion device, wherein the pulverized coal combustion device is arranged above the chain grate. Through the flue gas recirculating device, part of flue gas in the tail flue is guided back into a combustion chamber lower space where the chain grate is located and serves as recirculated flue gas, so that a low-oxygen combustion area is formed in the combustion chamber, wherein the low-oxygen combustion area is located below the pulverized coal combustion device, and the excess air coefficient of the low-oxygen combustion area is smaller than one. The pulverized coal combustion device is used for jetting pulverized coal into the combustion chamber and combusting the pulverized coal, so that an intensified combustion area is formed in the combustion chamber, wherein the intensified combustion area is located at the pulverized coal combustion device, and the excess air coefficient of the intensified combustion area is greater than one. By means of the chain furnace system, the combustion mode of the chain furnace is reorganized, and therefore a composite combustion mode including layer combustion and suspension chamber combustion can be achieved at the same time; and the NO<x> generation amount of the chain furnace can be effectively lowered, and the burn-off rate of the chain furnace can be effectively increased.

Description

technical field [0001] The invention relates to the technical field of chain furnaces, in particular to a chain furnace system and a chain furnace combustion method. Background technique [0002] The chain furnace is a layer-fired boiler. Its grate is similar to a chain crawler. It is driven by a reducer so that the coal falling on the grate is ignited from the front to the end of the boiler. Due to the advantages of simple structure, convenient operation and stable operation, the chain furnace is widely used in various industries such as chemical industry, papermaking, textile and heating, and is an important industrial boiler equipment in China. [0003] However, the design of the chain furnace did not take into account the NO x Inhibition of NO x Emissions remain high, and the pollution to the surrounding environment is particularly serious. Although some measures have been taken to reduce the NO of the chain furnace x emissions, but because the existing measures are ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F23C1/06F23C9/00F23L3/00F23C7/02F23C5/32F23N1/02
CPCF23C1/06F23C5/32F23C7/02F23C9/00F23C9/003F23C2201/10F23L3/00F23N1/02
Inventor 彭建升崔节明董永胜王家兴王冠楠路亭伟张超群
Owner YANTAI LONGYUAN POWER TECH
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