新型固体蓄热电加热锅炉的方案研究  

Study on the Scheme of New Type Solid Storage Thermos-Electric Heating Boiler

作　　者：赵雪 罗勇 韩博远 Zhao Xue;Luo Yong;Han Boyuan(School of Mechanical Engineering,Shijiazhuang Tiedao University,Shijiazhuang 050043,China)

机构地区：[1]石家庄铁道大学机械工程学院,河北石家庄050043

出　　处：《石家庄铁道大学学报（自然科学版）》2021年第4期81-86,共6页Journal of Shijiazhuang Tiedao University(Natural Science Edition)

基　　金：河北省自然科学基金(E2019210036)。

摘　　要：针对固体蓄热电加热锅炉在运行中电加热丝时常烧毁的现象,以某公司生产的4 MW蓄热锅炉为研究对象,经实验检测和理论分析得出,运行过程中蓄热体组内部存在严重的温差是主要原因。对于蓄热体组沿换热通道方向(Y轴)的温度不均匀问题,提出采用空气正反向交替流动的方案来进行解决。对原空气流动方式和空气正反向交替流动方式分别进行数值模拟,并从蓄热体温度和换热通道内壁温度2方面对模拟结果进行对比分析。结果表明,采用空气正反向交替流动的方式,有效地改善了蓄热体组沿换热通道方向(Y轴)温度分布的不均匀性,并且蓄热完善度提高了10.55%。最后提出了新型固体蓄热电加热锅炉的设计方案。In view of the phenomenon that electric heating wire is often burned in the operation of solid thermos-electric heating boiler,taking the 4 MW heat storage boiler produced by a company as the research object,through experimental detection and theoretical analysis,the main reason is that there is a serious temperature difference in the heat storage body group during operation.To solve the problem of temperature ununiformity of heat storage body along the direction of heat exchange channel(Y-axis),a scheme of alternating air flow in positive and negative direction was proposed.First of all,the original air flow mode and the positive and negative alternating air flow mode were numerically simulated respectively,and the simulation results were compared and analyzed from the temperature of regenerative body and the temperature of the inner wall of the heat exchange channel.The results show that:The non-uniformity of temperature distribution along the Y-axis direction of heat transfer channel is effectively improved by using air alternating flow in positive and negative direction,and the heat storage perfection is increased by 10.55%.Finally,a new design scheme of solid storage thermos-electric heating boiler is proposed.

关 键 词：固体蓄热电加热锅炉 空气正反向交替流动 蓄热完善度 设计方案 

分 类 号：TK02[动力工程及工程热物理]