共查询到17条相似文献,搜索用时 296 毫秒
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“双碳”背景下,提升焦炭质量是保证钢铁行业高质量发展的研究重点之一,而炼焦行业存在着在线实时监测难、焦炭质量预测模型泛化能力差等问题。为此,提出一种通过自适应全局搜索算法,即改进鲸鱼优化算法(WOA)与长短期记忆(LSTM)循环神经网络综合建模的方法来解决这一问题。首先选取出配合煤中可反映焦炭质量的可测参数,再运用主成分分析(PCA)去除变异性小的冗余因子后,得到预测因子,将其作为LSTM网络的外部输入;通过加入自适应惯性权重以及最佳扰动更新改进WOA,从而训练LSTM网络的超参数,采用均方根误差(RMSE)和R-squared 进行算法检验;最后将改进后的AGWOA-LSTM模型与典型的LSTM、WOA-LSTM模型进行对比,以验证本方法的优越性。结果表明AGWOA-LSTM模型预测焦炭质量具有精度高、运行速度快等特点。研究对焦炭生产具有一定的理论指导意义。 相似文献
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以太原煤炭气化(集团)有限责任公司的工业焦炉数据为基础,建立了该公司的焦炭质量预测模型。利用单种煤和配合煤的各种性质指标预测焦炭质量,并指导配煤,以获得稳定的焦炭质量。 相似文献
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通过测定焦炭光学组织和热性质,讨论了添加贫煤、贫瘦煤后焦炭光学组织的特征及其与焦炭质量之间的关系.添加贫煤、贫瘦煤后焦炭光学组织以细粒镶嵌和中粒镶嵌为主,类丝炭和破片含量相对较多,中等尺寸的焦炭光学组织结构单元更有利于焦炭强度的提寓通过回归分析,建立了焦炭质量预测模型,通过测定焦炭光学组织含量能够直接得到焦炭反应性和反... 相似文献
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In coking process, the production quality, equipment life, energy consumption, and process safety are all influenced by the pressure in gas collector pipe of coke oven, which is frequently influenced by disturbances. The main control objectives for the gas collector pressure system are keeping the pressures in collector pipes at appropriate operating point. In this paper, model predictive control (MPC) strategy is introduced to control the collector pressure system due to its ability to handle constraint and good control performance. Based on a method proposed to simplify the system model, an extended state space model predictive control is designed, which combines the feedforward strategy to eliminate the disturbance. The simulation results in a system with two coke ovens show the feasibility and effectiveness of the control scheme. 相似文献
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污水处理过程的多目标多模型预测控制方法研究 总被引:1,自引:0,他引:1
针对污水处理过程节能降耗问题以及污水处理过程的高度非线性、强耦合、不确定性等特点.以基于活性污泥2号模型ASM2的A2/O污水处理过程为研究对象,提出了污水处理过程的多目标多模型预测控制方法.该方法首先采用聚类-PLS方法建立污水过程的多模型预测模型,然后构建了包含出水水质区间控制和经济性能指标的多目标优化结构的预测控制策略.仿真结果表明,与设定值预测控制方法相比,多目标优化预测控制策略在保证出水水质的前提下,能有效地节约能耗费用. 相似文献
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焦炭强度与热性质控制因素分析 总被引:1,自引:0,他引:1
在20kg小焦记上进行了11种单种煤和8种配煤方案的炼焦试验,建立了焦炭质量预测模型。结果表明,单一的煤质指标与焦炭强度的关系不明显,多因素指标进行焦炭质量的预测效果较好;焦炭反应性与单一煤质指标中Vd、^—Rmax^0、Ad之间有较好的关系,且随反应温度的升高而增大。 相似文献
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基于支持向量机的焦炭质量预测模型 总被引:3,自引:2,他引:3
采用机器学习方法中的支持向量机技术来预测焦炭质量,不需要了解煤成焦机理,综合考虑配合煤特性和焦炉加热制度的影响,而且克服了人工神经网络预测精度低的缺点,在取得最小拟合误差的同时可以得到最小的预测误差;给出了一种基于组态王6.0与VB6.0的焦炭质量在线预测系统框架. 相似文献
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An approach to blast furnace coke quality prediction 总被引:3,自引:0,他引:3
Although coke cold drum mechanical strength has historically been the most relevant coke quality parameter, currently coke reactivity and post-reaction strength (CRI/CSR) are the most important parameters used to assess blast-furnace coke quality. Many models of coke quality prediction have been proposed, most of which are based on coal characteristics and limited to the same coal geographic origin, but as yet there is no universally applicable prediction formula. The present work describes a simple model of coke CRI/CSR prediction based on the assumption that the CSR of a coke produced from a blend of coals can be predicted from the CSR obtained from the cokes of the individual coals through the application of the additivity law. The additivity law was also applied to the coke cold mechanical strength indices derived from the Irsid test, which are widely employed by the European coke industry as complementary coke quality indicators. 相似文献
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The petrographic model for the assessment of quality characteristics according to the IGI procedure for coke produced by laminar
coking of coal blends suggests the determination of the maceral composition and obtaining a vitrinite reflectance histogram
for each component of the charge. From these data, the coking index of the charge and its leaning index are determined, which
allow for predictive evaluation of the mechanical strength of coke with the use of the IGI classification diagram. This approach
is successfully used at the Cherepovets iron-and-steel mill (CherMK) after the adjustment of the IGI procedure to the conditions
of this plant. 相似文献