SNCR denitrification technology for a 600 t/d MSW incinerator

CAI Jiecong1; CHEN Zhenchao2 1.Zhejiang Electric Power Test and Research Institute

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SNCR denitrification technology for a 600 t/d MSW incinerator

Thermal Power Generation Vol. 42, Issue 2, Pages: 30-35(2013)

更新时间：2025-09-28

- SNCR denitrification technology for a 600 t/d MSW incinerator
- 作者机构：
  
  1. 浙江省电力试验研究院
  2. 浙江大学能源工程学系
- 作者简介：
- 基金信息：
- DOI：
  CLC： X701
- Published：2013
- 稿件说明：
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CAI Jiecong1, CHEN Zhenchao2 1.Zhejiang Electric Power Test and Research Institute. SNCR denitrification technology for a 600 t/d MSW incinerator[J]. Thermal Power Generation, 2013, 42(2): 30-35.
DOI：

CAI Jiecong1, CHEN Zhenchao2 1.Zhejiang Electric Power Test and Research Institute. SNCR denitrification technology for a 600 t/d MSW incinerator[J]. Thermal Power Generation, 2013, 42(2): 30-35. DOI：

摘要

在1台600t/d的垃圾焚烧炉上采用选择性非催化还原(SNCR)脱硝技术进行脱硝

基于Fluent软件平台对该系统的尿素溶液与烟气的混合过程进行了数值模拟研究

探讨了温度、氨氮比(NSR)、喷射速度、液滴粒径等对脱硝率及漏氨量的影响。结果表明

脱硝率在960～1 000℃间可获得最佳值;当NSR=1.8时

脱硝率达到60%

NSR1.6后

脱硝率增长趋于平缓;在固定NSR和流量下

脱硝率随液滴粒径增大则先提高后降低再提高;漏氨量则随粒径的增大、温度的升高均呈现降低趋势

最佳的粒径分布为100μm;氨逃逸量与试验值相差较大

主要是实际中逃逸的氨气被飞灰吸附导致

飞灰吸附的氨量在40～90μg/g。

Abstract

The SNCR(selective non-catalytic reduction) denitrification technology was applied on a 600 t/d MSW(municipal solid waste) incinerator to control the NOx emission.Numerical simulation on mixing process of urea solution and flue gas in the SNCR system was conducted by using the Fluent software.The influence of such factors as temperature

NSR(normalized stoichiometric ratio)

jet velocity and droplet sized on NOx removal efficiency and ammonia leackage was discussed.The simulation results agreed well with the experimental data

indicating the simulation was reliable.The best NOx removal efficiency was obtained between 960 ℃ and 1 000 ℃.The NOx removal efficiency can reach 60% when the NSR equaled 1.8 and increased slowly when the NSR was larger than 1.6.The simulation results showed that

at fixed NSR and injection flow

the NOx removal efficiency first rose then decreased and finally went up again with an increase in droplet size.The ammonia leackage decreased with an increase in both droplet size and temperature

and the best droplet size was 100 μm.The great difference between the simulation and experimental data of ammonia leackage was mainly due to the adsorption of slipped ammonia by fly ash.The adsorbed ammonia by fly ash was within range of 40 μg/g to 90 μg/g.

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