Design of an Online Monitoring System for Combustion Field Parameter in a Furnace Based on Tunable Diode Laser Absorption Spectroscopy Technology

doi:10.12096/j.2096-4528.pgt.19183

Abstract

Abstract:

Based on the tunable diode laser absorption spectroscopy (TDLAS) technology, one-dimensional and multi-dimensional combustion parameter monitoring systems were designed to simultaneously monitor multiple combustion field parameters in the furnace (such as temperature, CO, CO₂, and NO concentration, etc.). In the one-dimensional system, the optical switch technology was applied to measure the multiple combustion parameters simultaneously. In the two-dimensional system, the spectrometer technology and algebraic reconstruction technique (ART) were introduced to inversion calculate and measure the two-dimensional combustion parameters in a layer. On this basis, the three-dimensional system was designed. The measurement procedures of three-dimensional combustion parameters were as follows: the combustion region in the furnace was divided into multilayer sections; the two-dimensional combustion parameters were reconstructed based on ART; the three-dimensional combustion parameters were reconstructed using the multilayer combustion parameter data. The combustion filed parameter monitoring system contributes to the fine combustion adjustment in the future.

Key words: coal-fired boiler, tunable diode laser absorption spectroscopy (TDLAS), pollutant concentration, online monitoring system

CLC Number:

TK 16

Yuan LI, Zhicheng GUO, Xiaochao MENG, Kefeng CHEN, Liming REN, Rui MAO, Kefa CEN. Design of an Online Monitoring System for Combustion Field Parameter in a Furnace Based on Tunable Diode Laser Absorption Spectroscopy Technology[J]. Power Generation Technology, 2022, 43(2): 353-361.

Figures/Tables 9

References 25

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参数	数值
收到基水分M_ar/%	8.00
收到基挥发分V_ar/%	26.39
收到基固定碳F_Car/%	44.38
收到基灰分A_ar/%	21.23
收到基碳C_ar/%	56.91
收到基氢H_ar/%	4.39
收到基氧O_ar/%	8.06
收到基氮N_ar/%	0.86
收到基硫S_ar/%	0.55
收到基低位发热量Q_net，ar/(MJ/kg)	22.55

参数	数值
收到基水分M_ar/%	8.00
收到基挥发分V_ar/%	26.39
收到基固定碳F_Car/%	44.38
收到基灰分A_ar/%	21.23
收到基碳C_ar/%	56.91
收到基氢H_ar/%	4.39
收到基氧O_ar/%	8.06
收到基氮N_ar/%	0.86
收到基硫S_ar/%	0.55
收到基低位发热量Q_net，ar/(MJ/kg)	22.55

参数	数值
机组负荷/MW	300
给煤量/(t/h)	127.5
标准状态下总风量/(m³/h)	913 869
一次风率/%	22
二次风率/%	59
三次风率/%	19
一次风温/℃	160
二次风温/℃	325
三次风温/℃	60
三次风带粉量/%	5

参数	数值
机组负荷/MW	300
给煤量/(t/h)	127.5
标准状态下总风量/(m³/h)	913 869
一次风率/%	22
二次风率/%	59
三次风率/%	19
一次风温/℃	160
二次风温/℃	325
三次风温/℃	60
三次风带粉量/%	5