垃圾热值对焚烧炉烟气再循环运用的影响研究

环境卫生工程

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垃圾热值对焚烧炉烟气再循环运用的影响研究

上海康恒环境股份有限公司

收稿日期:2021-12-22 修回日期:2022-02-21 接受日期:2022-04-04

Research on the influence of Lower Heat Value on Exhaust Gas Recirculation Technology in incinerator

Shanghai SUS Environment Co. Ltd.

Received:2021-12-22 Revised:2022-02-21 Accepted:2022-04-04

摘要/Abstract

摘要：

垃圾分类和协同处置工业有机固废的推进，使得垃圾热值逐步升高，进而影响烟气再循环技术在垃圾焚烧炉中的运用效果。本文通过理论计算、数值模拟和工程试验方法，分析了垃圾热值对垃圾焚烧炉运用烟气再循环系统的影响。结果表明，垃圾热值高于1900kcal/kg时再循环烟气比例控制在15-20%之间效果最佳，可降低炉膛平均温度约50℃，减少炉膛结焦，提高运行稳定性；烟气再循环耦合低空气比燃烧技术能提高锅炉效率，且垃圾热值越高其提高锅炉效率越明显；同时烟气再循环能有效降低焚烧炉NO_x源强，可将锅炉出口NOx控制在100 mg/Nm³（11% O₂，干基）以下；实现焚烧炉低NO_x源强的高效清洁燃烧。

关键词: 烟气再循环')">

烟气再循环, 垃圾热值, 氮氧化物, 锅炉效率

Abstract:

The advancement of waste classification and co-processing of industrial organic solid waste has gradually increased the Lower Heat Value(LHV) of waste, which in turn will affect the application of Exhaust Gas Recirculation(EGR) technology in waste incinerators. This paper analyzes the influence of LHV on the EGR system of waste incinerators through theoretical calculations, numerical simulations and engineering test methods. The results show that when the LHV is higher than 1900kcal/kg, the effect of controlling the best EGR ratio is 15-20%, which can reduce the furnace temperature about 50℃, reduce the coking of the furnace and improve the operation stability. EGR coupled with low air ratio combustion can improve boiler efficiency, and the improvement effect is more obvious with higher LHV of waste. At the same time, EGR can effectively reduce the source of NO_x in the incinerator, and the NO_x can be controlled at 100 mg/Nm³ (11% O₂, dry basis) or less at the outlet of boiler. To achieve high-efficiency and clean combustion with low NOx source strength in the incinerator.

Key words: Exhaust Gas Recirculation(EGR)')">

Exhaust Gas Recirculation(EGR), Lower Heat Value(LHV), NO_x, Boiler efficiency

龙吉生, 袁旗斌, 杜海亮. 垃圾热值对焚烧炉烟气再循环运用的影响研究 [J]. 环境卫生工程, 0, (): 0-.

LONG Jisheng, YUAN Qibin, DU Hailiang. Research on the influence of Lower Heat Value on Exhaust Gas Recirculation Technology in incinerator [J]. Environmental Sanitation Engineering, 0, (): 0-.

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