TEST STUDY ON INFLUENCE OF THE REVERSED TANGENTIAL ANGLE FOR SEPARATING OVER-FIRED AIR UPON THE AERODYNAMIC FIELD IN FURNACE

QI Hongmei; HUI Shien; CUI Dawei College of Energy and Power Engineering

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TEST STUDY ON INFLUENCE OF THE REVERSED TANGENTIAL ANGLE FOR SEPARATING OVER-FIRED AIR UPON THE AERODYNAMIC FIELD IN FURNACE

更新时间：2025-09-28

- TEST STUDY ON INFLUENCE OF THE REVERSED TANGENTIAL ANGLE FOR SEPARATING OVER-FIRED AIR UPON THE AERODYNAMIC FIELD IN FURNACE
- Thermal Power Generation Vol. 39, Issue 5, Pages: 13-17(2010)
- 作者机构：
  
  西安交通大学能源与动力工程学院
- 作者简介：
- 基金信息：
- DOI：
  CLC： TK221
- Published：2010
- 稿件说明：
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QI Hongmei, HUI Shien, CUI Dawei College of Energy and Power Engineering. TEST STUDY ON INFLUENCE OF THE REVERSED TANGENTIAL ANGLE FOR SEPARATING OVER-FIRED AIR UPON THE AERODYNAMIC FIELD IN FURNACE[J]. Thermal power generation, 2010, 39(5): 13-17.
DOI：

QI Hongmei, HUI Shien, CUI Dawei College of Energy and Power Engineering. TEST STUDY ON INFLUENCE OF THE REVERSED TANGENTIAL ANGLE FOR SEPARATING OVER-FIRED AIR UPON THE AERODYNAMIC FIELD IN FURNACE[J]. Thermal power generation, 2010, 39(5): 13-17. DOI：

摘要

通过对采用LNCFS-Ⅲ燃烧系统的600MW机组锅炉进行冷态模化试验

得到分离燃尽风率在0.32时随反切角度变化分离燃尽风区平均相对切圆直径(Dxd)SOFA、炉膛出口残余旋转动量流率矩Jout、炉膛出口水平烟道作用速度偏差E及速度不均匀性系数M2的变化规律。分离燃尽风反切角度在0°～15°范围内变化时

炉内旋转气流方向仍能保持不变;随着反切角度的增大

Jout、(Dxd)SOFA、E及M2减小

在θ=15°时最小;分离燃尽风反切角度大于15°小于20°时

炉膛上部旋转气流的旋转方向出现不稳定现象;分离燃尽风反切角度等于或大于20°之后

炉膛上部旋转气流出现稳定的反方向旋转现象。

Abstract

Through cold modelling test carried on boiler of a 600 MW unit adopting INCFS-Ⅲ combustion system

the vaiational regularity of the relative tangential circle diameter in the zone of separating over-fired air (SOFA)

(Dxd)SOFA

the flow rate moment of residual rotational momentum at furnace outlet Jout

the velocity deviation E

and the uneven coefficienty of velocity M2 due to effect of horizontal flue duct at furnace outlet along with the variation of reversed tangential angle under condition of SOFA ratio is 0.32

has been obtained.When the reversed tangential angle is in a range of 0°~15°

the rotation direction of main gas flow keeps unchanged;Jout

(Dxd)SOFA

and M2 decreases with increasing the revesed tangential angle

and being minimum at θ=15°;under condition of the reversed angle is greater than 15° but less than 20°

the rotation direction of rotational gas flow in upper space of the furnace is unstable;after the reversed tangential angle is equal to or greater than 20°

the rotational gas flow in upper space of the furnace will be stable

but the rotation direction being reversed.

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