Energy efficiency evaluation of co-production process of carbon black and fuel gas from microwave pyrolysis of waste rubber
微波裂解废旧橡胶的炭黑-燃气联产工艺能效评估

摘要

微波裂解废旧橡胶实现炭黑-燃气联产是一种高效资源化利用技术，其能效水平直接影响工艺的可行性与推广价值。本文围绕该工艺的能量转化效率、产物分布特性及系统能耗分布开展系统评估，构建了基于能量回收率与能效比的评价模型，量化了关键操作参数对能效的影响机制。微波功率、升温速率与载气流量显著影响燃气热值与再生炭黑收率，优化条件下能量回收率可达78.5%，显著优于传统热解方式。通过㶲分析揭示了能量损失主要集中于热解气冷凝与微波转化环节，提出余热集成与动态功率调控策略以提升整体能效。研究成果为废旧橡胶高值化利用的工业化设计提供能效优化依据。

Abstract

The co-production of carbon black and fuel gas through microwave pyrolysis of waste rubber is an efficient resource utilization technology, and its energy efficiency directly affects the feasibility and promotion value of the process. This paper conducts a systematic evaluation on the energy conversion efficiency, product distribution characteristics, and system energy consumption distribution of the process, constructs an evaluation model based on energy recovery rate and energy efficiency ratio, and quantifies the impact mechanism of key operating parameters on energy efficiency. Microwave power, heating rate, and carrier gas flow rate significantly affect the calorific value of fuel gas and the yield of regenerated carbon black. Under optimized conditions, the energy recovery rate can reach 78.5%, which is significantly better than traditional pyrolysis methods. Exergy analysis reveals that energy loss is mainly concentrated in the pyrolysis gas condensation and microwave conversion links, and strategies of waste heat integration and dynamic power regulation are proposed to improve the overall energy efficiency. The research results provide a basis for energy efficiency optimization in the industrial design of high-value utilization of waste rubber.