Numerical study on spray evaporation process of desulfurization wastewater in flue duct

WU Shuaishuai; LI Hongzhi; CHEN Hongwei; MU Xinglong; LI Fan

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Numerical study on spray evaporation process of desulfurization wastewater in flue duct

更新时间：2025-09-28

- Numerical study on spray evaporation process of desulfurization wastewater in flue duct
- Thermal Power Generation Vol. 44, Issue 12, Pages: 31-36(2015)
- 作者机构：
  
  1. 华北电力大学能源与动力工程学院
  2. 西安热工研究院有限公司
- 作者简介：
- 基金信息：
- DOI：
  CLC： X773
- Published：2015
- 稿件说明：
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WU Shuaishuai, LI Hongzhi, CHEN Hongwei, et al. Numerical study on spray evaporation process of desulfurization wastewater in flue duct[J]. Thermal power generation, 2015, 44(12): 31-36.
DOI：

WU Shuaishuai, LI Hongzhi, CHEN Hongwei, et al. Numerical study on spray evaporation process of desulfurization wastewater in flue duct[J]. Thermal power generation, 2015, 44(12): 31-36. DOI：

摘要

针对脱硫废水处理问题

建立了烟道内气液两相流动、传热传质和雾化液滴蒸发的数学模型

并利用该模型对某330MW机组锅炉空气预热器后接烟道内雾化液滴的蒸发过程进行模拟研究

分析了烟气温度、雾化液滴初始直径、初始温度和初始速度对其完全蒸发时间的影响。结果表明:烟气温度越高

雾化液滴完全蒸发所需要的时间越短;雾化液滴初始直径越大

其完全蒸发时间越长;雾化液滴初始速度和初始温度对其完全蒸发时间的影响不大;雾化液滴完全蒸发过程中

烟气温度最佳值为134℃及以上

雾化液滴初始直径最佳值为10~60μm。该结果可为脱硫废水烟道蒸发处理系统的设计及运行优化提供参考。

Abstract

A mathematical model describing gas-liquid two phase flow

heat and mass transfer and atomized droplet evaporation in flue duct was established and its reliability was verified combing with the actual operating data of a utility boiler.Moreover

taking a 330 MW unit as the example

this model was applied to simulate the evaporation process of the atomized droplets in the flue duct after the preheater.The effects of flue gas temperature

atomized droplet diameter

initial droplet temperature and velocity on the droplets' life time were analyzed.The results show that the simulation results agree well with the experimental data

indicating this model can satisfy the requirements of thermal calculation for desulfurization waste water flue duct spraying system.The droplets' life time gets shorter with an increase in the flue gas temperature.The larger the droplets size

the more violent the changes in the droplets' life time.The initial droplet temperature and velocity has little effects on the droplets' life time.During the droplets evaporation

the optimum flue gas temperature is 134 ℃ and the above and the most suitable droplet diameter is between 10μm and60μm.The conclusion can provide basis for the system design for desulfurization wastewater spray evaporation and operation optimization of the wastewater treatment.

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