Sealing system optimization for air preheater in a 600 MW boiler

LIU Yongfeng; YU Dezhong; ZHANG Zhongzhou; CHENG Wei

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Sealing system optimization for air preheater in a 600 MW boiler

更新时间：2025-09-28

- Sealing system optimization for air preheater in a 600 MW boiler
- Thermal Power Generation Vol. 42, Issue 10, Pages: 127-130(2013)
- 作者机构：
  
  南阳鸭河口发电有限责任公司
- 作者简介：
- 基金信息：
- DOI：
  CLC： TK223.34
- Published：2013
- 稿件说明：
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LIU Yongfeng, YU Dezhong, ZHANG Zhongzhou, et al. Sealing system optimization for air preheater in a 600 MW boiler[J]. Thermal power generation, 2013, 42(10): 127-130.
DOI：

LIU Yongfeng, YU Dezhong, ZHANG Zhongzhou, et al. Sealing system optimization for air preheater in a 600 MW boiler[J]. Thermal power generation, 2013, 42(10): 127-130. DOI：

摘要

南阳鸭河口电厂二期2×600MW机组4台LAP13494/2200回转式空气预热器(空预器)存在扇形板自动控制系统故障、漏风率大等问题

其主要原因是密封间隙装置长期处于高温区

而且空预器扇形板调节装置失灵所致。通过采用三密封技术、托曳式密封技术和新型的径向密封结构

配合自动控制系统对其密封间隙系统进行了优化。优化后的试验表明

漏风率由10%降低至5%以内

达到其设计要求

系统的自动调节品质及安全经济性明显提高。

Abstract

Sector plate automatic control system fault and large air leakage rate occurred on four LAP13494/2200 type rotary air preheaters equipped on phaseⅡ 2×600 MW units in Nanyang Yahekou Power Plant.The sealing gap device existing in high temperature zone for long time and the sector plate regulation device equipped on air preheater is out of control were considered as the major reasons.By applying the three sealing technology

Joe drag seal technology

and new type of radial seal structure

and combining with the automatic control system

the sealing clearance system was optimized.The tests after the optimization showed that

the air leakage rate decreased from 10% to below 5%

which satisfied the design requirement.The automatic control quality and safe economy of the system was greatly improved.

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