Study on the emission characteristics of nitrogen oxides with coal combustion in pressurized fluidized bed

Zheng Gong; Yingjuan Shao; Lei Pang; Wenqi Zhong; Chao Chen

doi:10.1016/j.cjche.2018.07.020

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Study on the emission characteristics of nitrogen oxides with coal combustion in pressurized fluidized bed

Energy, Resources and Environmental Technology | Updated：2026-01-06

- Study on the emission characteristics of nitrogen oxides with coal combustion in pressurized fluidized bed
- Chinese Journal of Chemical Engineering Vol. 27, Issue 5, Pages: 1177-1183(2019)
- Affiliations：
  
  Key Laboratory of Energy Thermal Conversion and Control of Ministry of Education, School of Energy and Environment, Southeast University,Nanjing,China,210096
- Author bio：
- Funds：
- DOI：10.1016/j.cjche.2018.07.020
  CLC：
- Published：2019
- Accepted：
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Zheng Gong, Yingjuan Shao, Lei Pang, Wenqi Zhong, Chao Chen. Study on the emission characteristics of nitrogen oxides with coal combustion in pressurized fluidized bed[J]. Chinese Journal of Chemical Engineering, 2019, 27(5): 1177-1183.
DOI：

Zheng Gong, Yingjuan Shao, Lei Pang, Wenqi Zhong, Chao Chen. Study on the emission characteristics of nitrogen oxides with coal combustion in pressurized fluidized bed[J]. Chinese Journal of Chemical Engineering, 2019, 27(5): 1177-1183. DOI： 10.1016/j.cjche.2018.07.020.

摘要

Abstract

Nitrogen oxides are one of the most significant pollution sources during coal combustion. This experimental study was conducted in a 15 kW

lab-scale pressurized fluidized bed (inner diameter=81-100 mm

=2100 mm) firing with bituminous coals. The effects of operating parameters

including bed temperature (800℃-900℃)

operating pressure (0.1-0.4 MPa)

excess air level (16%-30%) and flow pattern on NO

and N

O emissions were systematically studied during the tests. During each test the interaction effects of all the operating parameters were properly controlled. The results show that most operating parameters have an opposite effect on NO

and N

O emissions

and the N

O emissions mainly depend on the bed temperature. Increasing the operating pressure can significantly suppress the fuel-N conversion to NO

but enhance its conversion to N

O. With the rise of the excess air level and fluidization number

emissions grow distinctly while N

O emissions remain almost unchanged. Total nitrogen oxide emissions increase with the bed temperature while

decrease with the operating pressure.

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