Anti-slagging swirling flow pulverized coal combustion device suitable for industrial pulverized coal boiler

A pulverized coal boiler and pulverized coal combustion technology, applied in the direction of burner, combustion method, combustion type, etc., can solve problems such as slagging in the furnace, and achieve the effects of slowing down slagging, preventing slagging, and preventing wall ash

Inactive Publication Date: 2019-04-16
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In order to solve the problem of severe slagging in the existing small and medium-sized industrial pulverized coal boilers due to the limitation of furnace siz

Method used

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  • Anti-slagging swirling flow pulverized coal combustion device suitable for industrial pulverized coal boiler
  • Anti-slagging swirling flow pulverized coal combustion device suitable for industrial pulverized coal boiler
  • Anti-slagging swirling flow pulverized coal combustion device suitable for industrial pulverized coal boiler

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specific Embodiment approach 1

[0022] Specific implementation mode one: combine Figure 1 to Figure 3 This embodiment is described. The anti-slagging swirling pulverized coal combustion device suitable for industrial pulverized coal boilers described in this embodiment includes a combustion system and a flue gas recirculation system. The combustion system consists of a burner and a pre-combustion system. The flue gas recirculation system includes a recirculation fan 5, a recirculation flue gas branch pipe 7, a recirculation flue gas pipe valve 8, a plurality of recirculation flue gas nozzles 9 and a recirculation flue gas pipe 10. The burner is connected to the front wall of the furnace 6 through the pre-combustion chamber 4, and a plurality of recirculation flue gas nozzles 9 are uniformly arranged on the inlet end surface of the pre-combustion chamber 4 along the circumferential direction, and the axes of the recirculation flue gas nozzles 9 and the pre-combustion chamber 4 The angle between the vertical ...

specific Embodiment approach 2

[0023] Specific implementation mode two: combination Figure 1 to Figure 3 Describe this embodiment, the burner of an anti-slagging swirl pulverized coal combustion device suitable for industrial pulverized coal boilers in this embodiment includes a primary air duct 1, an inner secondary air channel 2, an inner secondary air swirl device 2-1, the outer secondary air channel 3 and the outer secondary air cyclone 3-1, the primary air pipe 1 is inserted in the inner secondary air channel 2, and the inner secondary air channel 2 is inserted in the outer secondary air In the channel 3 , the inner secondary air cyclone 2 - 1 is arranged in the inner secondary air channel 2 , and the outer secondary air cyclone 3 - 1 is arranged in the outer secondary air channel 3 . Other components and connections are the same as those in the first embodiment.

specific Embodiment approach 3

[0024] Specific implementation mode three: combination Figure 1 to Figure 3 Describe this embodiment, the primary air duct 1, the inner secondary air channel 2, and the outer secondary air channel 3 of the anti-slagging swirl pulverized coal combustion device suitable for industrial pulverized coal boilers described in this embodiment are coaxially arranged . Other components and connections are the same as those in the second embodiment.

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Abstract

The invention relates to a swirling flow pulverized coal combustion device suitable for an industrial pulverized coal boiler, in particular to an anti-slagging swirling flow pulverized coal combustiondevice suitable for the industrial pulverized coal boiler, and belongs to the field of industrial pulverized coal boiler equipment. The problem that serious slagging in a furnace exists due to the fact that an existing small and medium sized industrial pulverized coal boiler is limited by the furnace hearth size and combustion mode is solved. The anti-slagging swirling flow pulverized coal combustion device comprises a combustor, wherein the combustor is connected with a front wall of a furnace hearth through a precombustion chamber, a plurality of recirculating flue gas nozzles are evenly distributed in the inlet end surface of the precombustion chamber in the circumferential direction, and the included angle between the axis of the recirculating flue gas nozzles and the vertical line ofthe inlet end surface of the precombustion chamber is (b). A recirculating flue gas pipeline is connected with the inlet ends of recirculating flue gas branch pipelines, the recirculating flue gas nozzles are connected with the outlet ends of the recirculating flue gas branch pipelines, a plurality of recirculating flue gas pipeline valves are installed on the recirculating flue gas branch pipelines, and a recirculating fan is connected with the recirculating flue gas pipeline.

Description

technical field [0001] The invention relates to a swirl pulverized coal combustion device suitable for industrial pulverized coal boilers, in particular to an anti-slagging swirl pulverized coal combustion device suitable for industrial pulverized coal boilers, belonging to the field of industrial pulverized coal boiler equipment. Background technique [0002] Industrial boiler is an important thermal power equipment, which plays an indispensable role in industrial production and social life. In my country, based on the energy reserves of more coal, less oil and poor gas and relatively backward industrial technology, coal-fired industrial boilers still account for more than 80% of the total number of industrial boilers, and the annual coal consumption is nearly 640 million tons. Due to the relative backwardness of related technologies, my country's coal-fired industrial boilers generally have problems such as serious pollution and low efficiency. [0003] Compared with the ...

Claims

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Application Information

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IPC IPC(8): F23C9/00F23D1/02
Inventor 陈智超严蓉张斌曾令艳李争起
Owner HARBIN INST OF TECH
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