CAUSE ANALYSIS ABOUT SLAGGING IN THE START-UP PROCESS OF BOILERS AND PREVENTION THEREOF

QIN Jian-zhu1; CHEN Shun-min2; JIANG Jian-zhong3; YANG Jun41.Longyan Power Generation Co Ltd

doi:10.19666/j.rlfd.2008.09.009

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CAUSE ANALYSIS ABOUT SLAGGING IN THE START-UP PROCESS OF BOILERS AND PREVENTION THEREOF

更新时间：2025-09-28

- CAUSE ANALYSIS ABOUT SLAGGING IN THE START-UP PROCESS OF BOILERS AND PREVENTION THEREOF
- Thermal Power Generation Issue 9, Pages: 32-34(2008)
- 作者机构：
  
  1. 龙岩发电有限责任公司
  2. 河南瑞平煤电有限公司
  3. 西安热工研究院有限公司
  4. 武汉大学动力机械学院
- 作者简介：
- 基金信息：
- DOI：10.19666/j.rlfd.2008.09.009
  CLC： TK229.6
- Published：2008
- 稿件说明：
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QIN Jian-zhu1, CHEN Shun-min2, JIANG Jian-zhong3, et al. CAUSE ANALYSIS ABOUT SLAGGING IN THE START-UP PROCESS OF BOILERS AND PREVENTION THEREOF[J]. Thermal power generation, 2008, (9): 32-34.
DOI：

QIN Jian-zhu1, CHEN Shun-min2, JIANG Jian-zhong3, et al. CAUSE ANALYSIS ABOUT SLAGGING IN THE START-UP PROCESS OF BOILERS AND PREVENTION THEREOF[J]. Thermal power generation, 2008, (9): 32-34. DOI： 10.19666/j.rlfd.2008.09.009.

摘要

龙岩发电有限责任公司4×135MW机组循环流化床(CFB)锅炉在起动过程多次出现结焦现象

分析认为其根本原因在于给煤口给煤不均匀导致床温偏差大

炉内积存大量的未燃焦炭

一、二次风量调整不及时等。对此

提出了对2号炉A、B刮板给煤机的下煤口进行改造

将A2、B2下煤口由原来的600mm×600mm的方形改成底边600mm、高600mm的三角形

以及调整一、二次风量使氧量不低于8%等。改造实施后

经近一年的运行锅炉未再出现过结焦现象。

Abstract

The slagging phenomenon has appeared many times on CFB boilers of 4×135 MW units in Longyan Power Generation Co Ltd during the process of start-up.It is believed from analysis that the basic causes are as follows:uneven coal-feeding throuh coal feed port

leading to large deviation of bed temperature;a lot of unburnt coke accumulated in the furnace;and the regulation of primary air and secondary air isn't in time

etc..For these

retrofit measure of coal-dropping port for the scraper type coal feeders A and B equiped for boiler no.2 has been put forward

the coal-dropping ports A2 and B2 being reshaped from the original square of 600 mm ×600 mm to a triangle with bottom side of 600 mm and a height of 600 mm;at the same time

the primary air and secondary air have been adjusted in time

making the oxygen content to be not lower than 8%.After implementation of retrofit

the slagging phenomenon hasn't appeared again in the process of operation about one year.

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