Numerical simulation of inner abrasion in a selective catalytic reduction deNO<sub>x</sub> device

ZHONG Yafei; WEI Hongqi; CHEN Jingwei

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Numerical simulation of inner abrasion in a selective catalytic reduction deNO_x device

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- Numerical simulation of inner abrasion in a selective catalytic reduction deNO_x device
- Thermal Power Generation Vol. 45, Issue 3, Pages: 75-81(2016)
- 作者机构：
  
  东南大学能源与环境学院
- 作者简介：
- 基金信息：
- DOI：
  CLC： X773
- Published：2016
- 稿件说明：
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ZHONG Yafei, WEI Hongqi, CHEN Jingwei. Numerical simulation of inner abrasion in a selective catalytic reduction deNO_x device[J]. Thermal power generation, 2016, 45(3): 75-81.
DOI：

ZHONG Yafei, WEI Hongqi, CHEN Jingwei. Numerical simulation of inner abrasion in a selective catalytic reduction deNO_x device[J]. Thermal power generation, 2016, 45(3): 75-81. DOI：

摘要

为解决选择性催化还原(SCR)脱硝装置在运行中出现的喷氨喷嘴和催化剂层严重磨损问题

采用GAMBIT软件模拟脱硝装置内部流场的速度分布

并通过现场冷态试验验证模型的有效性。模拟结果表明:SCR脱硝装置入口处烟道存在上下或左右倾斜

整流格栅和转向弯头处存在高度差

使得烟气经过整流格栅后进入催化剂层的速度分布不均匀

导致喷氨喷嘴和催化剂层磨损;本文在数值模拟中改变引起流场分布不均的结构

能够解决其所造成的脱硝装置磨损问题;模拟结果与实际磨损状况一致

说明本文所用数值模型能准确模拟脱硝装置速度分布。

Abstract

To solve the problem of severe abrasion of the ammonia injection spray nozzle and catalyst layer in selective catalytic reduction(SCR)equipment

the velocity distribution of the flow field in the internal flow field was simulated using GAMBIT software.The applied simulation model was verified through field cold test.The results show that the SCR denitration device has a high degree of difference between the top and bottom of the flue gas entrance

the rectifier grid and the steering elbow

which makes the gas flow through the rectifier grid into the catalyst layer.In the numerical simulation

the structure of the flow field distribution is changed

which can solve the abrasion problem of denitration device caused by the uneven distribution of the flow field.The numerical model can accurately simulate the velocity field distribution in the SCR device.

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Numerical simulation of inner abrasion in a selective catalytic reduction deNOx device

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Numerical simulation of inner abrasion in a selective catalytic reduction deNO_x device