摘要
热化学碘硫/混合硫循环是最有前景的利用高温气冷堆工艺热实现大规模制氢的技术。硫酸分解器作为实现反应堆与制氢工艺的关键设备,其性能对核能制氢的安全性和制氢效率具有重要影响。刺刀管式碳化硅反应器在耐高温、耐硫酸腐蚀以及热量回收等方面具有优势,对其进行结构优化能够提升反应性能。在前期研究基础之上,本文研制了新型结构尺寸的刺刀管式碳化硅反应器,并开展了热工水力学和硫酸分解实验研究。研究过程中监测了反应器进出口流体温度、外壁温度、压降以及产氧速率等关键参数,根据这些参数分析了水和硫酸在碳化硅反应器内部的状态变化;同时采用模拟软件Aspen Plus搭建了热量计算模型,借助模型计算了硫酸分解过程所需热量以及反应器在进水和进硫酸过程中的热负荷,分析了反应器的换热性能。研究结果表明:新型结构碳化硅反应器能够降低组装难度并提高反应通量,产氧速率最高达到154 L·h-1,相比于原始结构反应器,反应通量提高了50%;此外,碳化硅反应器能够实现产物热量回收,降低热量损耗,碳化硅反应器内物料升温过程约有30%的热量来自反应产物。该研究为列管换热式硫酸分解器的研制奠定了基础。
[Background]The thermochemical iodine sulfur(IS)and hybrid sulfur(HyS)cycles are considered as the most promising technologies for large-scale hydrogen production using the process heat from high temperature gas-cooled reactors(HTGRs).As the key component for coupling HTGR to the IS or HyS hydrogen production plant the performance of the sulfuric acid decomposer(SAD)significantly impacts the coupling safety as well as the hydrogen production efficiency.[Purpose]This study aims to develop a novel bayonet-type SiC reactor and investigate its heat transfer performance and SAD reaction performance.[Methods]First of all,a novel bayonet-type SiC reactor was developed on the basis of previous research,and the Aspen Plus software was employed to built heat calculation models for the sulfuric acid decomposition reaction and the SiC reactor.Subsequently,the reactor was subjected to a water inlet experiment,during which the inlet and outlet fluid temperatures,tube wall temperature,and pressure drop were tested.Then,the thermal load of the reactor was calculated,and the state changes of the inlet water inside the reactor were analyzed.Finally,the reactor was subjected to a sulfuric acid decomposition experiment to test the inlet and outlet fluid temperatures,tube wall temperature,pressure drop,and oxygen production rate.In addition,the thermal load of the sulfuric acid decomposition process was calculated.The heat transfer performance and reaction performance of the reactor were comprehensively evaluated based on the experimental results.[Results]The results demonstrate that the SiC reactor with the new structure can reduce the assembly difficulties,increase the reaction flux,and achieve an oxygen production rate of up to 154 L·h-1.Compared with the original reactor,the reaction flux increases by 50%.In addition,the SiC reactor can enhance heat recovery and utilization;about 30%of the heat in the fluid heating process in the SiC reactor comes from the reaction products.[Conclusions]This study provides a foundation for the development of a shell-and-tube type prototype SAD which may directly utilize heat from HTGR.
作者
张鹏
肖鹏
刘雷
李林
马巧贞
张平
ZHANG Peng;XIAO Peng;LIU Lei;LI Lin;MA Qiaozhen;ZHANG Ping(CHINERGY Co.,Ltd.,Beijing 100193,China;Institute of Nuclear and New Energy Technology,Tsinghua University,Beijing 100084,China)
出处
《核技术》
北大核心
2025年第12期159-168,共10页
Nuclear Techniques
基金
中核集团青年英才项目
国家科技重大专项(No.ZX06901)资助。
关键词
核能制氢
硫酸分解器
换热性能
反应性能
Nuclear hydrogen production
Sulfuric acid decomposer
Heat transfer performance
Reaction performance
