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Industrial pulverized coal boiler boiler-inside denitration combustion device with reducing agent being sprayed to main combustion area of combustor

A pulverized coal boiler and combustion device technology, which is applied in the direction of burning powder fuel burners, burners, block fuel and powder fuel combustion, etc., can solve the problems of poor load adaptability and high NOx emissions, and achieve enhanced The effect of graded combustion degree, reduction of NOx emission and avoidance of flue gas corridor

Inactive Publication Date: 2019-04-19
HARBIN INST OF TECH
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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 solve the problems of high NOx emissions of industrial pulverized coal boilers and poor adaptability of denitrification in the furnace to the load, and further provide a denitrification combustion device in the main combustion area of ​​the industrial pulverized coal boiler burner spraying reducing agent

Method used

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  • Industrial pulverized coal boiler boiler-inside denitration combustion device with reducing agent being sprayed to main combustion area of combustor
  • Industrial pulverized coal boiler boiler-inside denitration combustion device with reducing agent being sprayed to main combustion area of combustor
  • Industrial pulverized coal boiler boiler-inside denitration combustion device with reducing agent being sprayed to main combustion area of combustor

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specific Embodiment approach 1

[0019] Specific implementation mode one: combine Figure 1-Figure 3 Describe this embodiment, the industrial pulverized coal boiler burner main combustion zone of the industrial pulverized coal boiler burner sprays the denitrification combustion device in the furnace, which includes a burner, a recirculation flue gas pipeline 16 and an induced draft fan 18, and the burner includes a primary air duct 1. DC secondary air duct 2, swirl inner secondary air duct 3, swirl outer secondary air duct 4, first axial swirl vane 5 and second axial swirl vane 6; it also includes a mixer 7. Amino reducing agent delivery pipe 8, concentrated pulverized coal delivery pipe 9, three secondary air air pipes, three secondary air air pipe valves 14, three recirculation flue gas pipe valves 15, three recirculation flue gas Branch pipes 17, four first-level overburning air nozzles 11 and multiple second-level overburning air nozzles 12; primary air duct 1, DC secondary air duct 2, swirling inner seco...

specific Embodiment approach 2

[0020] Specific implementation mode two: combination Figure 1-Figure 3 Describe this embodiment, the industrial pulverized coal boiler burner main combustion area of ​​the industrial pulverized coal boiler burner in this embodiment sprays the denitrification combustion device in the furnace, the primary air pipe 1 passes through the direct current secondary air pipe 2 and is connected to the outlet of the mixer 7 . Other methods are the same as in the first embodiment.

specific Embodiment approach 3

[0021] Specific implementation mode three: combination image 3 To illustrate this embodiment, the industrial pulverized coal boiler burner main combustion area of ​​the industrial pulverized coal boiler burner sprays the denitrification combustion device in the furnace, each primary burn-off air nozzle 11 is set toward the center of the boiler furnace 10, and the four primary burn-off air The center line of the air spout 11 is tangent to the circle where the center line of the boiler furnace 10 is located. Other methods are the same as in the first embodiment.

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Abstract

The invention provides an industrial pulverized coal boiler boiler-inside denitration combustion device with a reducing agent being sprayed to a main combustion area of a combustor, relates to the boiler boiler-inside denitration combustion device and aims to solve the problems of high NOx emission quantity of present industrial pulverized coal boilers and poor adaptive capacity of boiler-inside denitration on load. The industrial pulverized coal boiler boiler-inside denitration combustion device comprises the combustor, a recirculating smoke pipeline and a draft fan, the combustor comprises aprimary air pipe, a direct current secondary air pipe, a swirl flow inner secondary air pipe, a swirl flow outer secondary air pipe, a first axial swirl flow blade and a second axial swirl flow blade, and the industrial pulverized coal boiler boiler-inside denitration combustion device further comprises a mixer, an amino reducing agent conveying pipe, a thick pulverized coal conveying pipe, threesecondary air pipelines, three secondary air pipeline valves, three recirculating smoke pipeline valves, three recirculating smoke branch pipelines, four first-stage overfire air nozzles and a plurality of second-stage overfire air nozzles. The industrial pulverized coal boiler boiler-inside denitration combustion device with the reducing agent being sprayed to the main combustion area of the combustor is used for the field of boiler combustion.

Description

technical field [0001] The invention relates to a denitrification combustion device in a boiler furnace, in particular to a denitrification combustion device in a furnace for spraying a reducing agent in a main combustion area of ​​an industrial pulverized coal boiler burner, and belongs to the field of boilers. Background technique [0002] Coal-fired industrial boilers are the main coal-consuming equipment in my country except power plant boilers. At present, the total number of coal-fired industrial boilers in my country is close to 600,000 units, and the annual coal consumption exceeds 600 million tons. Annual NO of coal-fired industrial boilers x With an emission of about 2 million tons, it has become one of the most important emission sources of NOx pollutants in my country. On May 16, 2014, the National Ministry of Environmental Protection promulgated the "Boiler Air Pollutant Emission Standard" GB13271-2014, which clearly stipulates that coal-fired hot water boilers...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F23D1/02F23C5/32F23C7/00F23C9/06F23J7/00
Inventor 陈智超严蓉杜贺曾令艳李争起
Owner HARBIN INST OF TECH
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