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Intensive-classification low-NOx pulverized coal burner

A pulverized coal burner and pulverized coal technology, applied in the direction of burners, burners burning powder fuel, combustion methods, etc., can solve the problems of high fly ash combustibles, combustion delay, etc., and achieve good ignition stability and combustion delay Burning, adaptable effects

Active Publication Date: 2014-04-30
XUZHOU KERONG ENVIRONMENTAL RESOURCES CO LTD
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Problems solved by technology

[0004] However, while applying the above technology to meet the national pollutant emission reduction requirements, especially when it is applied to the transformation of the original tradi

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  • Intensive-classification low-NOx pulverized coal burner

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Example Embodiment

[0012] An embodiment of the present invention will be further described below in conjunction with the accompanying drawings:

[0013] The enhanced graded low-NOx pulverized coal burner of the present invention is mainly composed of a primary air passage 1, a secondary air passage in a direct current 2, a secondary air passage in a swirling flow 3, a secondary air passage in a swirling flow 4, and a pulverized coal equalizer 5. The pulverized coal separator 6 is constituted; the pulverized coal equalizer 5 is set on the inlet side of the straight pipe section of the primary air channel 1, and the pulverized coal separator 6 is set on the outlet side. The primary air channel 1 is surrounded by a DC internal secondary air. Passage 2, the outer wall of the secondary air passage 2 in the direct current is provided with a swirling inner secondary air passage 3 that merges into the same passage and is injected into the furnace. The outlet of the primary air passage 1 is provided with a p...

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Abstract

An intensive-classification low-NOx pulverized coal burner comprises a primary air passage, a direct-flow inner secondary air passage and a cyclone inner secondary air passage; pulverized coal is separated by a coal flow equalizer and a pulverized coal separator disposed in the primary air passage into thick-inside thin-outside structure at a spout, blown into a hearth; the inner secondary air passage is provided with a direct-flow air inlet and a cyclone air inlet; secondary air is mixed in the inner secondary air passage and spayed into the hearth; volume of the direct-flow air is controlled through a pull rod, so that cyclone strength of the inner secondary air can be controlled. Each of primary and secondary air outlets is provided with a certainly angular spout expanded-cone structure, real-time mixing of the secondary air and the pulverized coal is effectively controlled, a spout water-cooling wall is in the oxidization atmosphere in a long period of time meanwhile, and slag buildup and high temperature corrosion can be effectively prevented for the water-cooling wall in a burner area. The intensive-classification low-NOx pulverized coal burner has the advantages that combustion stability is high, adjusting performance is good, the burner is well adaptable to various coals, and emission of nitric oxide is low.

Description

Technical field [0001] The invention relates to the technical field of power station boilers, in particular to an enhanced graded low-NOx pulverized coal burner suitable for coal-fired boilers. Background technique [0002] With the increasingly stringent control of nitrogen oxide emissions from power station boilers in the country, a combustion system technology with full furnace air grading and low NOx burners has been widely used, and various types of low NOx swirl and DC burners have been formed. technology. [0003] For the hedge-wall boiler, in order to effectively reduce the nitrogen oxides in the furnace, the whole furnace staged combustion low NOx emission technology adopts the all air (oxygen) required for the combustion of the pulverized coal in the furnace to be divided into two Part of the air is injected into the furnace from the nozzle of the main burner in the lower furnace to meet the oxygen required for early combustion of pulverized coal; while the other par...

Claims

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Application Information

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IPC IPC(8): F23D1/02
CPCF23D1/02F23C2900/06041F23D1/00F23D2201/10F23D2201/20
Inventor 程怀志高克迎
Owner XUZHOU KERONG ENVIRONMENTAL RESOURCES CO LTD
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