首页|气化炉内熔渣流动特性预测模型的研究进展

气化炉内熔渣流动特性预测模型的研究进展

Research progress on predictive models for slag flow in gasifiers

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双碳战略目标下,煤气化技术将会是我国未来煤炭领域的重要发展路线.在煤气化技术推广应用中,熔渣的流动行为严重影响气化炉的平稳运行时长,间接影响合成气的质量和炉壁的热量损失,有效求解流动参数的熔渣流动特性预测模型备受关注.本研究论述了现有的气化炉内熔渣流动特性的预测模型,并展望了预测模型的未来研究方向.综述当下,预测模型根据熔渣流动维数可分为一维预测模型和二维预测模型;一维稳态和非稳态预测模型均经历了构建和完善阶段;二维预测模型因无相关的数学公式描述和流动理念假设尚处于构建阶段;通过对液态熔渣的温度分布、附加应力的取舍,临界黏度的选取和熔渣黏度的处理方式等方面可以提高模型的计算精度.展望未来,一维预测模型的应用场景需更完善的规定,针对稳态和非稳态预测模型求解的参数需要更细致的辨析;二维预测模型的构建理论需更详细的突破,明确非稳态工况下熔渣在轴向和周向上流动的优先级;流动预测模型的计算精度需更全面的提升,熔渣性质的非恒定性、熔化的不均匀性、烟气流速的波动性等因素需要侧重考虑.
Under the"dual carbon"strategic goal,coal gasification technology will be an important development path in China's future coal industry.In the promotion and application of coal gasification technology,the flow behavior of slag seriously affects the stable opera-tion time of gasifiers,indirectly affecting the quality of synthesis gas and the heat loss of furnace walls.The effective prediction model for slag flow characteristics to solve flow parameters has attracted much attention.This study discussed the existing predictive models for the flow characteristics of slag in gasifiers and looks forward to the future research directions of predictive models.At present,prediction mod-els can be divided into one-dimensional prediction models and two-dimensional prediction models based on the dimension of slag flow.Both one-dimensional steady-state and non-stationary prediction models have gone through the stages of construction and improvement.The two-dimensional prediction model is still in the construction stage due to the lack of relevant mathematical formula descriptions and flow concept assumptions.The calculation accuracy of the model can be improved by considering the temperature distribution of liquid slag,the selection of additional stress,the selection of critical viscosity,and the treatment of slag viscosity.Looking ahead to the future,the application scenarios of one-dimensional prediction models require more comprehensive regulations and more detailed analysis is nee-ded for the parameters solved by steady-state and non-stationary prediction models.The construction theory of two-dimensional prediction models requires a more detailed breakthrough,clarifying the priority of slag flow in the axial and circumferential directions under nonsteady state conditions.The calculation accuracy of slag flow prediction models needs to be comprehensively improved,with a focus on factors such as the non-constancy of slag properties,non-uniformity of melting,fluctuation of flue gas flow rate,and diversity of coal ash types.

coal gasification technologyliquid slagflow characteristicsprediction modelflow dimension

赵义军、白孟龙、张林瑶

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哈尔滨工业大学能源科学与工程学院,黑龙江哈尔滨 150001

煤气化技术 液态熔渣 流动特性 预测模型 流动维数

中央高校基本科研业务费专项资金资助项目

2022ZFJH004

2024

洁净煤技术
煤炭科学研究总院 煤炭工业洁净煤工程技术研究中心

洁净煤技术

CSTPCD北大核心
影响因子:0.893
ISSN:1006-6772
年,卷(期):2024.30(2)
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