A separate pulverized coal nozzle
A separate, pulverized coal technology, which is applied in the direction of the burner, combustion method, and combustion type of powder fuel, can solve the problems of power plant economy, safety, and NOx emission that are not up to standard, and trouble the development of power plants, so as to facilitate the prevention and control of power plants. Coking, low NOx emission, good ignition effect
Active Publication Date: 2016-08-17
WUXI HUAGUANG BOILER
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Problems solved by technology
In recent years, many power plants have used fuels with high water content, high ash content, and low calorific value, making the power plants' economy, safety and NOx emissions not up to standard, which seriously plagued the further development of power plants
Method used
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specific Embodiment 1
[0013] Specific embodiment one, see figure 1 : When the nozzle outlet 3 on the rich side is located below the nozzle outlet 4 on the light side, the guide plates 6 are arranged at intervals from top to bottom along the direction of the pulverized coal flow, and each guide plate 6 is inclined downward along the direction of the pulverized coal flow. The guide plate 6 is located above the inlet height of the nozzle outlet 3 on the rich side.
specific Embodiment 2
[0014] Specific embodiment two, see figure 2 : When the nozzle outlet 3 on the rich side is located above the nozzle outlet 4 on the light side, the guide plates 6 are arranged at intervals along the direction of the pulverized coal flow from bottom to top, and each guide plate 6 is inclined upward along the direction of the pulverized coal flow. 6 is located below the inlet height of the nozzle outlet 3 on the rich side.
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The invention provides a separate-type pulverized coal nozzle which can be flexibly arranged, is conducive to burning of low-volatile fuel and reducing of N0x generation, good in fuel adaptability, especially suitable for high-moisture, high-ash, low-volatile and low-heat-value fuel and beneficial to improving of burn-off rate. The separate-type pulverized coal nozzle comprises a nozzle inlet, two nozzle outlets and a middle flowing pipeline, and pulverized coal direct flow is directly communicated with the nozzle inlet. The separate-type pulverized coal nozzle is characterized in that the nozzle outlets are in up-down arrangement and include a thick-side nozzle outlet and a thin-side nozzle outlet which are isolated through a partition, outlet tracks of the thick-side nozzle outlet and the thin-side nozzle outlet form a flaring angle, guide plates are arranged in the middle flowing passage at intervals, a flowing space is reserved between the rear end of each guide plate and the front end of the guide plate behind, and most of the pulverized coal airflow is guided to enter the thick-side nozzle outlet by the guide plates.
Description
technical field [0001] The invention relates to the technical field of boiler structures, in particular to a separate pulverized coal nozzle. Background technique [0002] High efficiency and low emission are the principles that must be followed in the design of pulverized coal boilers, and the pulverized coal nozzle is an important part of the pulverized coal burner, which plays the role of pulverized coal ignition, stable combustion, control of combustion process and nitrogen oxide emission. In recent years, many power plants have used fuels with high water content, high ash content, and low calorific value, making the power plants' economy, safety and NOx emissions not up to standard, which seriously plagued the further development of power plants. Contents of the invention [0003] In view of the above problems, the present invention provides a separate pulverized coal nozzle, which can be arranged flexibly, is conducive to the combustion of low volatile fuels, reduces...
Claims
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IPC IPC(8): F23D1/00
Inventor 陈益增薛金彪韦志平孟慧潘甜甜
Owner WUXI HUAGUANG BOILER