A review on seal technology of rotary air preheaters

WANG Yikun; CHEN Guohui; WANG Zhigang; ZHANG Guangcai

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A review on seal technology of rotary air preheaters

更新时间：2025-09-28

- A review on seal technology of rotary air preheaters
- Thermal Power Generation Vol. 44, Issue 8, Pages: 1-7(2015)
- 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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RETROFIT MEASURES OF THE ROTARY AIR PREHEATERS

Energy conservation analysis for waste heat utilization system applying air preheater and using primary air to heat condensate water

Numerical simulation on thermodynamic characteristics of air preheater bypass flue gas waste heat utilization system

Reliability state identification for key auxiliary equipments in thermal power units

Flue gas recirculation scheme for double-reheat boilers

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