AN APPROACH TO SAMPLING METHOD FROM DIRECT-FIRING TYPE COAL PULVERIZING SYSTEM

XIAO Jie; LIU Yue-zhenJiangsu Provincial Electric Power Testing and Research Institute Co Ltd

doi:10.19666/j.rlfd.2008.07.007

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AN APPROACH TO SAMPLING METHOD FROM DIRECT-FIRING TYPE COAL PULVERIZING SYSTEM

Thermal Power Generation Issue 7, Pages: 30-34(2008)

更新时间：2025-09-28

- AN APPROACH TO SAMPLING METHOD FROM DIRECT-FIRING TYPE COAL PULVERIZING SYSTEM
- 作者机构：
  
  江苏省电力试验研究院有限公司
- 作者简介：
- 基金信息：
- DOI：10.19666/j.rlfd.2008.07.007
  CLC： TK223.25
- Published：2008
- 稿件说明：
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XIAO Jie, LIU Yue-zhenJiangsu Provincial Electric Power Testing and Research Institute Co Ltd. AN APPROACH TO SAMPLING METHOD FROM DIRECT-FIRING TYPE COAL PULVERIZING SYSTEM[J]. Thermal Power Generation, 2008, (7): 30-34.
DOI：

XIAO Jie, LIU Yue-zhenJiangsu Provincial Electric Power Testing and Research Institute Co Ltd. AN APPROACH TO SAMPLING METHOD FROM DIRECT-FIRING TYPE COAL PULVERIZING SYSTEM[J]. Thermal Power Generation, 2008, (7): 30-34. DOI： 10.19666/j.rlfd.2008.07.007.

摘要

煤粉取样是测试直吹式制粉系统煤粉特性的主要手段

国内经常采用平头取样枪、多头枪、AKOMA自动平衡3种煤粉等速取样系统。由于位置不同的煤粉管中风速与煤粉分布不同

且分布存在波动

应用不同取样系统的煤粉取样代表性差别较大。实际应用结果表明

AKOMA取样系统取样时间长

样品量大

有利于克服制粉系统气粉分布波动对取样准确性的影响。建议取样时根据测点条件选择适合的取样系统。

Abstract

The sampling of pulverized coal is a main means for testing the property of pulverized coal in a direct-firing type coal pulverizing system

three isokinetic sampling systems have been commonly adopted for pulverized coal at home.The distribution of air flow rate and pulverized coal in burner pipelines is different due to their different positions

and the distribution is fluctuating

hence

the deviation of representativeness for sampled pulverized coal by using different sampling systems is comparatively large.Results of practical application show that the AKOMA sampling system has long time duration of sampling and large amount of samples

being helpful for over coming the influence of fluctuation in air flow rate and pulverized coal distribution inside the coal pulverizing system upon the accuracy of sampling.It is recommended to select suitable sampling system during the time of sampling based on the condition of measuring points.

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