1.5 MPa多喷嘴对置式水焦浆气化炉的模拟与优化

Simulation and Optimization of Multi-Nozzle Opposed Water Coke Slurry Gasifier at 1.5 MPa

针对w(水焦浆)和氧焦比预测优化过程未采用严格反应机理模型,工艺参数的预测优化与实际生产存在较大偏差的情况,以UniSim Design流程模拟软件为工具,采用Gasifier反应器严格机理模型建立了1.5 MPa多喷嘴对置式水焦浆气化炉模型,并根据工业数据对水焦浆气化炉进行标定,标定结果相对误差小于2%,同时研究了氧焦比和w(水焦浆)对焦煤气化工艺参数的影响。结果表明:w(水焦浆)和氧焦比是影响水焦浆气化过程和粗煤气组成的关键因素,通过气化炉模型标定和优化分析,石油焦的氧焦比控制范围为0.95~1.10,为焦煤浆气化工艺生产实践指导提供了理论依据。

As the strict reaction mechanism model has not been used in the prediction optimization process of water coke slurry concentration and oxygen-coke ratio, the prediction process parameters largely deviate from the plant data. This article first established the model of the multi-nozzle opposed water coke slurry gasifier at 1.5 MPa using UniSim Design Gasifier reactor and plant data was used to calibrate coke slurry gasifier. The relative error of calibration results is less than 2%, and the effects of oxygen-coke ratio and water coke slurry concentration on coal gasification process parameters are studied. The results show that the coke slurry concentration and oxygen-coke ratio are the key factors affecting the coke slurry gasification process and crude syngas composition. The oxygen-coke ratio control range of the coke coal mixture is 0.95~1.10 through gasification calibration model and optimization analysis, which provides a theoretical basis for the practical guidance of coke slurry gasification process production.