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Multi-section pipeline pulverized coal burner

A pulverized coal burner, pipeline-type technology, applied in the direction of burner, burner burning powder fuel, controlling combustion, etc., can solve the problems of polluting air, affecting the outward emission of the furnace, energy waste, etc., and achieve the reduction of nitrogen oxides The generation of heat radiation, the effect of ensuring thermal radiation performance, and inhibiting the formation of scaling

Active Publication Date: 2018-09-21
INNER MONGOLIA JINTU ENVIRONMENTAL PROTECTION TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the pulverized coal is burned, the temperature in the furnace reaches above 900°C, which will produce a large amount of nitrogen oxides and pollute the environment; and because of the large internal space of the furnace, on the one hand, it will cause uneven distribution of pulverized coal in the furnace and insufficient combustion. Part of the pulverized coal will be discharged along with the flue gas, resulting in waste of pulverized coal and polluting the air. On the other hand, the heat dissipation area of ​​the furnace wall is relatively small compared with the volume of the furnace, resulting in low utilization rate of furnace radiant heat, resulting in waste of energy, and the furnace The high temperature environment in the furnace will cause the coal ash to melt, and scale will be formed on the furnace surface, which will affect the radiation heat of the furnace.

Method used

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  • Multi-section pipeline pulverized coal burner
  • Multi-section pipeline pulverized coal burner
  • Multi-section pipeline pulverized coal burner

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Embodiment 1: as figure 1 with figure 2 As shown, the multi-section pipeline type pulverized coal burner includes a controller 1 and two pipeline combustion mechanisms 2. When in use, the feed port of the metering feed pump 21 of each pipeline combustion mechanism 2 passes through the pipeline and the pulverized coal bin connected, the tail of the secondary combustion tube 27 of each pipeline combustion mechanism 2 is connected to the heat exchange device and the tailings purification and collection device in turn; the metering feed pump 21 can quantitatively pump the pulverized coal in the pulverized coal bin to the primary combustion Inside the pipe 22; the pipeline combustion mechanism 2 includes a metering feed pump 21, a primary combustion pipe 22, a primary fan 23, an igniter 24, a combustion chamber 25, a combustion fan 26, a secondary combustion pipe 27, a secondary fan 28, and a gas monitor 29. The metering feed pump 21, the primary combustion pipe 22, the co...

Embodiment 2

[0015] Embodiment 2: as image 3 with Figure 4 As shown, the difference from Embodiment 1 is that the duct combustion mechanism 2 also includes two heat exchange devices 210 and a water pump 211 communicated with the water inlet of each heat exchange device 210, and the primary combustion pipe 22 and the secondary combustion pipe 27 A heat exchange device 210 is set on the outside of the heat exchange device, and the water inlet of the heat exchange device 210 is connected with the water outlet of the corresponding water pump 211 through a pipeline; the water pump 211 is connected with the controller 1, and the controller 1 controls the working frequency of the water pump 211; The device 210 can fully absorb the radiant heat of the primary combustion tube 22 and the secondary combustion tube 27, and improve the heat utilization efficiency; the internal temperature of the primary combustion tube 22 and the secondary combustion tube 27 is controlled by the heat exchange device ...

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Abstract

The invention discloses a multi-section pipeline type pulverized coal combustor which comprises a controller and a plurality of pipeline combustion mechanisms. The controller is connected with metering and feeding pumps, primary fans, combustion fans and gas monitors of the pipeline combustion mechanisms, and working frequencies of the metering and feeding pumps, the primary fans, the combustion fans and the gas monitors are controlled by the controller. The multi-section pipeline type pulverized coal combustor has the advantages that tail gas of each pipeline combustion mechanism can be monitored by the aid of the corresponding gas monitor, monitoring results can be transmitted to the controller, and accordingly the various pipeline combustion mechanisms can be precisely controlled by the controller; hearths are replaced by the multiple pipeline combustion mechanisms, accordingly, pulverized coal and air can be promoted to be sufficiently mixed and combusted with each other, the pulverized coal utilization rate can be increased, the burnout rate of the pulverized coal can reach 98% at least, the heat utilization rate can be increased, the internal temperatures of pipelines can be effectively reduced, scale formation further can be inhibited, generation of nitride oxide can be reduced, and environmental pollution can be decreased.

Description

Technical field: [0001] The invention relates to a pulverized coal burner, in particular to a pulverized coal burner of multi-section pipeline type. Background technique [0002] Most of the existing pulverized coal combustion devices spray the pulverized coal into the furnace through the nozzle, and then utilize the igniter to ignite the pulverized coal airflow in the furnace. When the pulverized coal is burned, the temperature in the furnace reaches above 900 °C, which will produce a large amount of nitrogen oxides and pollute the environment; and because of the large internal space of the furnace, on the one hand, it will cause uneven distribution of coal powder in the furnace and insufficient combustion. Part of the pulverized coal will be discharged along with the flue gas, resulting in waste of pulverized coal and polluting the air. On the other hand, the heat dissipation area of ​​the furnace wall is relatively small compared to the volume of the furnace, resulting in...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F23N1/02F23D1/00F23C7/00
CPCF23C7/00F23D1/00F23N1/02
Inventor 陈海军陈晓航
Owner INNER MONGOLIA JINTU ENVIRONMENTAL PROTECTION TECH