共查询到18条相似文献,搜索用时 140 毫秒
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涂装喷淋系统对前处理的喷淋效果起着重要的作用,喷淋泵的流量与扬程决定着喷嘴的压力和流量及喷淋效果。通过对喷淋管路系统进行实例计算,合理选择喷嘴及其喷淋压力,准确计算喷淋泵的流量及扬程,对管路进行优化,降低局部阻力及扬程阻力,节约成本。 相似文献
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涂装喷淋系统对前处理的喷淋效果起着重要的作用,喷淋泵的流量与扬程决定喷嘴的压力和流量,决定着喷淋效果。本文通过对喷淋管路系统进行实例计算,合理选择喷嘴及其喷淋压力,准确计算喷淋泵的流量及扬程,对管路进行优化,降低局部阻力及扬程阻力,从而节省成本,提高经济效益。 相似文献
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从理论上分析了风机、泵类负载的流量、转速、扬程与功率之间的关系,举例证明了应用变频调速器来改变风机流量比调节风门开度改变流量的方法节能降耗效果更显著。 相似文献
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通过离心泵与管路系统的特性曲线图分析了离心泵流量调节的几种主要方式:出口阀门调节、泵变速调节和泵的串、并联调节.用特性曲线图分析了出口阀门调节和泵变速调节两种方式的能耗损失,并进行了对比,指出离心泵用变速调节流量比用出口阀门调节流量可以更好的节约能耗,且节能效率与流量变化大小有关. 相似文献
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本研究利用变频器,通过改变电机的供电频率测出IHG32-125立式化工管道离心泵不同转速下的流量,关联出该泵设计点下的流量与转速间的关系,并与比例定律进行比较,分析产生误差的主要原因。 相似文献
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Experimental Characterization of a Flow‐through Pulsation Damper Regarding Pressure Pulsations and Vibrations 下载免费PDF全文
Andreas F. Koegler Daniel Haselmann Nicolas S. A. Alt Eberhard Schluecker 《化学工程与技术》2017,40(1):162-169
Pressure attenuators, especially side branch bladder‐type accumulators, for suppression of pressure pulsations in industrial fluid applications are not suitable for higher‐pressure pulsation frequencies, e.g., with centrifugal pumps. Accumulators of the flow‐through‐type promise a faster response time and thus a wider application range. The damping performance of a flow‐through pressure accumulator with respect to fluid pressure pulsations and the resulting structure‐borne noise was investigated. The influence of varying pulsation frequencies, damper precharge pressure, and damping effect throughout the piping system was evaluated. Experiments were performed in an industrial‐scale closed‐loop test facility, with both pressure pulsations and piping vibrations in the focus. The damper, characterized by means of high‐speed video analysis, proved to be capable of damping effectively the pressure pulsations and piping vibrations induced by a centrifugal pump. 相似文献
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对于粉体气力输送流动区域划出中等浓度区,使浓相输送与稀相输送的区分变得清楚、分析了粉体气力输送管道压降的主要影响因素,在量纲分析基础上,对中浓度气力输送提出一个比较简洁的管道压降关联式,与文献的实验数据进行拟合,结果表明该式可以很好地描述粉煤灰中浓度气力输送管道的总压降。对于给定的一个相图,该式的系数k、有一固定的数值;此值与物料质量流率(或气体质量流率)、料气比无关。 相似文献
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Ozone dissolution system design is important for meeting transfer efficiency (TE) goals. Large sidestream pump flow (L) and high venturi inlet pressure improves TE but increases operating cost. Ozone TE was examined at a 25 gpm (97-Lpm) pilot-scale sidestream system with (SSw-dg) and without (SSwo-dg) degas separation. Under constant ozone dose conditions, process operating parameters were varied including sidestream gas/liquid (G/L) ratio, venturi-inlet water pressure, venturi-outlet water pressure, feed gas pressure, and ozone gas concentration. Performance results included determination of TE, ozone exposure (CTHDT), and hydraulic detention time (THDT). Several design aspects of sidestream ozone systems were examined to improve mass transfer by using remixing devices, protecting ozone gas piping from corrosion, calculating sidestream ozone residual, and driving force for mass transfer. Moisture contamination of ozone supply lines may cause corrosion and/or decomposition of ozone gas that releases heat and destroys ozone. Ozone gas piping design is critical to prevent trapping water that might enter gas pipe during power outage or when units are offline. During plant operation below design flow, multiple constant speed pumps or variable speed pumps were evaluated to reduce overall operating costs. 相似文献
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矿浆泵在大流量、高扬程,且流量和扬程变化范围大的情况下,对液力调速与变频调速两种调速方式在节能和技术、经济等方面进行了比较.从而确定经济合理的调速方式. 相似文献
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脉冲料栓式密相气力输送系统研究 总被引:2,自引:0,他引:2
介绍了脉冲料栓式密相气力输送系统输送装置和输送原理,分析了料栓在输送过程中的流动行为以及栓压与栓长栓速之间的关系,分析了料气速度比及压损公式,为设计和使用脉冲料栓式密相气力输送系统提供参考。 相似文献