Performance analysis of a novel combined water bath dust collector with impingement water bath and spray string grid

CHENG Wei; ZHANG Yingmin; NIU Chao; YE Zaixian; ZHENG Yonggang; FANG Lijun

doi:10.11930/j.issn.1004-9649.202507044

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Performance analysis of a novel combined water bath dust collector with impingement water bath and spray string grid

更新时间：2026-03-17

- Performance analysis of a novel combined water bath dust collector with impingement water bath and spray string grid
- Vol. 59, Issue 3, Pages: 156-164(2026)
- 作者机构：
  
  1. 天津国能津能热电有限公司,天津,300304
  2. 宁波象山光明输送机有限公司,浙江,宁波,315731
  3. 北京中电尚明机电技术有限公司,北京,100080
  4. 华北电力大学（保定）动力工程系,河北,保定,071003
- 作者简介：
- 基金信息：
- DOI：10.11930/j.issn.1004-9649.202507044
  CLC：
- Online First：16 March 2026，
  
  Published：16 March 2026
- 稿件说明：
移动端阅览
程伟, 张英民, 牛超, 叶再贤, 郑永刚, 方立军. 新型冲击水浴与喷雾弦栅复合式水浴除尘器性能分析[J]. 中国电力, 2026, 59(3): 156-164.

CHENG Wei, ZHANG Yingmin, NIU Chao, et al. Performance analysis of a novel combined water bath dust collector with impingement water bath and spray string grid[J]. 2026, 59(3): 156-164.
程伟, 张英民, 牛超, 叶再贤, 郑永刚, 方立军. 新型冲击水浴与喷雾弦栅复合式水浴除尘器性能分析[J]. 中国电力, 2026, 59(3): 156-164. DOI： 10.11930/j.issn.1004-9649.202507044.

CHENG Wei, ZHANG Yingmin, NIU Chao, et al. Performance analysis of a novel combined water bath dust collector with impingement water bath and spray string grid[J]. 2026, 59(3): 156-164. DOI： 10.11930/j.issn.1004-9649.202507044.

摘要

燃煤电厂输煤系统工作过程中容易产生大量的粉尘，若净化处理不当，将对环境造成严重污染。在水浴除尘技术和喷雾弦栅除尘技术研究基础上，提出一种新型冲击水浴与喷雾弦栅复合式水浴除尘器，通过对各除尘阶段进行数值模拟，分析影响除尘效果的因素。结果表明，冲击水浴段截面方面，风速越高，风管初始浸没水深越深，液体波动程度越剧烈，相应除尘阻力增大。喷雾方面，随着雾化压力升高，喷出液滴粒径变小，但雾化压力过高导致液滴凝聚，粒径增大，除尘效率下降。弦栅方面，建立双列弦栅局部模型，对速度场和压力场进行模拟，阻力损失集中在两列弦栅的前后区域，气流高低速区域交替分布，形成负压区。随着风速增加，负压范围随之扩大，有利于弦栅水膜形成，但同时将导致除尘阻力增大。提出的复合式设计融合了冲击水浴、喷雾弦栅等多重净化机制，具有高效、低耗、易维护的特点，尤其适用于输煤系统高浓度、多粒径的粉尘环境，解决了传统机械式除尘器对微米级粉尘去除率低的问题，为输煤系统除尘提供了模块化解决方案。

Abstract

Coal-fired power plants' coal handling systems generate substantial dust during operation. Improper purification treatment will cause severe environmental pollution. On the basis of research on water bath dust removal technology and spray string grid dust removal technology

this paper proposes a novel combined water bath dust collector integrating impingement water bath and spray string grid. The factors influencing the dust removal efficiency are analyzed by conducting numerical simulations on each dust removal stage. The results indicate that for the cross-section of the impingement water bath section

the higher the wind speeds and the deeper the initial immersion water depth of the air duct

the more intense the liquid fluctuation

correspondingly increasing dust removal resistance. In terms of spraying

the particle size of the ejected liquid droplets decreases with the increase of atomization pressure; however

an excessively high pressure leads to droplet agglomeration and an increase in particle size

resulting in a decline in dust removal efficiency. For the string grid

a local double-row string grid model is established to simulate the velocity and pressure field. The resistance loss is concentrated in the front and rear areas of the double-row string grids

and the high and low wind speed areas of the airflow are alternately distributed

forming a negative pressure zone. With the increase of wind speed

the negative pressure range expands accordingly

which is conducive to the formation of a water film on the string grids but also causes an increase in dust removal resistance at the same time. The combined design proposed in this paper integrates multiple purification mechanisms such as impingement water bath and spray string grid

and features high efficiency

low energy consumption and easy maintenance. It is particularly suitable for the dust environment with high-concentration and multi-particle size in the coal handling system

solving the problem of low removal efficiency of micron-sized dust by traditional mechanical dust collectors

and providing a modular solution for dust removal in coal handling system.

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