A review on seal technology of rotary air preheaters

WANG Yikun; CHEN Guohui; WANG Zhigang; ZHANG Guangcai

English

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A review on seal technology of rotary air preheaters

Thermal Power Generation Vol. 44, Issue 8, Pages: 1-7(2015)

更新时间：2025-09-28

- A review on seal technology of rotary air preheaters
- 作者机构：
  
  西安热工研究院有限公司
- 作者简介：
- 基金信息：
- DOI：
  CLC： TM621.2
- Published：2015
- 稿件说明：
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WANG Yikun, CHEN Guohui, WANG Zhigang, et al. A review on seal technology of rotary air preheaters[J]. Thermal Power Generation, 2015, 44(8): 1-7.
DOI：

WANG Yikun, CHEN Guohui, WANG Zhigang, et al. A review on seal technology of rotary air preheaters[J]. Thermal Power Generation, 2015, 44(8): 1-7. DOI：

摘要

目前

我国电站锅炉回转式空气预热器(空预器)普遍存在漏风率较高、运行可靠性较低等问题。空预器的密封型式是决定其漏风率的关键因素。为此

对回转式空预器的不同密封型式进行了详细介绍和比较。从实际应用效果来看:空预器采用多密封技术配以可调式密封系统

其漏风率较低;采用柔性密封技术后及时进行检修更换

也能将漏风率控制在较低水平;间隙自补偿密封、疏导密封和加压密封目前应用较少

其可靠性及应用效果仍需观察。

Abstract

High air leakage and low operation reliability are common problems occurred in rotary air preheaters

and a good seal type plays an important role in reducing the air leakage.Thus

different seal types of rotary air preheaters are described in detail.The actual application shows the multi-sealing technology is the most widely-used one

with adjustable sealing system

it will achieve a low air leakage rate.The flexible sealing technology can also keep the air leakage rate at a low level if were examined and replaced timely.The gap self-compensated seal technology

guiding seal technology and pressurized seal technology are applied fewer at present

their reliability and application prospects still need observation.

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