离心级联大面积工况调整的干扰影响研究
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- 英文论文题名：The study of interference effects caused by large-area adjustment to working-condition in centrifuge cascade
- 论文作者：罗杰元
- 英文论文作者：LUO Jie-yuan ; Sichuan Honghua Industrial Co. ; Ltd.
- 年：2015
- 作者机构：四川红华实业有限公司;
- 论文关键词：工况调整 ; 流体干扰 ; 大面积
- 英文论文关键词：working-condition adjustment ; influence of interference ; large-area
- 会议召开时间：2015-09-21
- 会议录名称：中国核科学技术进展报告（第四卷）——中国核学会2015年学术年会论文集第4册（同位素分离分卷）
- 语种：中文
- 分类号：TQ028.54
- 学会代码：EGVD
- 会议名称：中国核学会2015年学术年会
- 会议地点：中国四川绵阳
- 主办单位：中国核学会
- 学会名称：中国核学会
- 页数：9
- 文件大小：450k
- 原文格式：O
- 会议级别：全国
摘要
离心级联在转产丰度差异较大的产品时,级联超过70%的分离级工况需进行调整。该调整过程产生的干扰多,持续时间长,对离心级联安全运行影响大。本文根据级联理论和级联水力学,对离心级联各级工况调整产生的流体干扰特性进行了研究。建立了计算流体干扰在级联浓化、贫化方向传播至各级的数学模型。经计算可知,流体干扰对相邻两分离级的影响最大,沿浓化方向衰减较快,经3~4级后干扰影响已不足1%;沿贫化方向衰减很慢,影响级数较多,可一直影响到贫料端。通过对各级流量与贫料压力变化关系的研究,得到了其变化的相关关系,据此对级联特殊部位分离级工况调整的幅度进行修正。离心级联大面积工况调整时,应由贫化方向向浓化方向分台阶逐级整定,并降低供料点、层架端部、流量搭接点等特殊部位分离级的工况。合理控制工况调整的幅度及速度,从而控制流体干扰幅度,并使干扰逐个依次向贫化方向传播,避免相邻干扰叠加,保障离心机的运行安全。
In production to a product having large differentiation in centrifuge cascade,more than70%working condition of separation stages will need to be adjusted.The adjusting process leads to much interference,long duration,large influence on the safe operation of the centrifugal cascade.This article starting from hydraulics feature relationship of centrifuge cascade,analyses the fluid interference principle caused by working-condition adjustment of separation stages,establishes a suitable model,deduces mathematical expressions that fluid Interference spreads in the direction of enrichment and dilution.Through calculation and analysis,fluid interference causes the greatest impaction on the adjacent separation stage,decreases rapidly in the direction of enrichment,the influence of interference disappears after 3 to 4 stages;decreases slowly in the direction of dilution,and effects to the end of waste.Based on the research of the change relationship between flow rate and waste pressure of separation stages,fixes the adjustment amplitude of working-condition of separation stages in special parts.Therefore,when adjusts large-area working station in centrifuge cascade,should sub-steps gradually adjusts from the direction of enrichment to dilution,and reduce working-condition of separation stages in special parts.Sub-steps adjusting working-condition can control the amplitude of interference,gradually adjusting can avoid superposition of adjacent interference.So we can ensure the Safe operation of the centrifuge.
In production to a product having large differentiation in centrifuge cascade,more than70%working condition of separation stages will need to be adjusted.The adjusting process leads to much interference,long duration,large influence on the safe operation of the centrifugal cascade.This article starting from hydraulics feature relationship of centrifuge cascade,analyses the fluid interference principle caused by working-condition adjustment of separation stages,establishes a suitable model,deduces mathematical expressions that fluid Interference spreads in the direction of enrichment and dilution.Through calculation and analysis,fluid interference causes the greatest impaction on the adjacent separation stage,decreases rapidly in the direction of enrichment,the influence of interference disappears after 3 to 4 stages;decreases slowly in the direction of dilution,and effects to the end of waste.Based on the research of the change relationship between flow rate and waste pressure of separation stages,fixes the adjustment amplitude of working-condition of separation stages in special parts.Therefore,when adjusts large-area working station in centrifuge cascade,should sub-steps gradually adjusts from the direction of enrichment to dilution,and reduce working-condition of separation stages in special parts.Sub-steps adjusting working-condition can control the amplitude of interference,gradually adjusting can avoid superposition of adjacent interference.So we can ensure the Safe operation of the centrifuge.
引文
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[2]张存镇.离心分离理论[M].北京:原子能出版社,1987.
[3]杨永全.工程水力学[M].北京:中国环境科学出版社,2003.
[2]张存镇.离心分离理论[M].北京:原子能出版社,1987.
[3]杨永全.工程水力学[M].北京:中国环境科学出版社,2003.