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《煤炭加工与综合利用》2017,(Z1)
介绍了快速装车系统在石圪台选煤厂的应用情况,包括快速装车系统的结构组成、工作过程、液压系统工作原理;同时介绍了该装车系统的自动控制系统的系统结构和功能、各类保护装置及原理;最后介绍了装车系统的工作过程。 相似文献
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《中国石油和化工标准与质量》2018,(21)
由于油品储运现场装车作业过程中静电接地夹经常出现夹持不可靠,导静电不正常情况,对于无静电连锁装车时,静电不导通会产生大量的静电积聚,存在很大的安全隐患。对于有静电连锁装车系统,导静电不正常时,系统检测后会报警并关泵、关阀、停止装车业,重新夹持接地正常后再开启系统继续装车作业,耽误装车时间,降低了装车效率,对上述问题进行了分析研究,研制了一种新型的静电接地夹:采用增力机构替代弹簧机构,夹紧力增大使接地夹顶针能顺利的刺破罐体附件上较厚的锈蚀层或油漆层,接触到内部的金属层,并在装车过程中保持较大的夹紧力,确保静电接地夹在装车过程中能保持可靠的静电导通状态。 相似文献
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<正>移动式袋装水泥汽车装车机在水泥包装过程中的广泛应用,大大提高了袋装水泥码包装车的速度,节省了装车劳动力,减少了搬运装车过程中造成的破袋现象。但水泥袋在经过装车机出料托板落入车厢内进行码包过程中,袋内残留的气体会因为碰撞而快速逸出,夹带着水泥形成扬尘。为此,我们设计安装了移动式袋装水泥装车机收尘装置。1收尘罩设计我公司水泥包装袋规格:(74±1)cm×(50.5±1)cm; 相似文献
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近些年来,由于称重技术的迅速发展,在保证产品质量、节省生产所需成本、提高生产安全性方面,汽车快速定量装车系统的作用日益凸显,准确的监控和计量密切关系着煤矿企业的经济利益,因此在郭家河煤矿中应用汽车快速定量装车系统具有重要意义。本文主要分析了郭家河煤矿原装车系统问题,汽车快速定量装车系统应用项目背景,汽车快速定量装车系统设计,汽车快速定量装车系统在郭家河煤矿运行。 相似文献
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王耀 《煤炭加工与综合利用》2019,(2)
为使选煤厂快速定量装车系统能够用于装载集装箱,对装车溜槽下料口、平车压实系统、集装箱位置偏移检测装置等进行了设计改造,取得了很好的效果,提升了装车系统能力,具备了装载集装箱和其他标准车厢的能力,而且装载质量达到预期要求,可使煤炭生产企业取得较好的效益。 相似文献
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介绍了干雾抑尘机理以及微米级干雾抑尘装置的结构组成及工作原理,该装置在黑岱沟选煤厂快速装车站末煤外运装车过程中的应用,有效抑制了粉尘排放,改善了装车站的工作环境,提高了选煤厂的经济效益。 相似文献
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乙烯酮(双乙烯酮)是十分重要的化工中间体,其下游产品较多。江苏某化工厂开发生产乙烯酮(双乙烯酮)下游产品三十多个,年生产规模三万多吨,是国内以乙烯酮(双乙烯酮)为中间体生产精细化学品的综合骨干企业。针对乙烯酮(双乙烯酮)下游产品废水特点,该厂结合企业实际,开展了产品优化,结构调整,清洁生产,资源循环利用,节水降耗等工作,从源头削减了污染物的生产。同时投资二千多万元新建预处理装置三套,6000m3/d废水生化处理装置一套,使全厂乙烯酮(双乙烯酮)下游产品的废水得到了有效的治理。 相似文献
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我厂3号回转窑(Φ4m×60m)生产线在1996年年底由SP窑(产量912t/d)改为NSP窑(产量1320t/d),预分解系统为四级旋风预热器带离线式分解炉 相似文献
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The miscibility of various amorphous polybutadienes with mixed microstructures of 1,4 addition units (cis, 1,4 and trans 1,4) and 1,2 addition units have been investigated. The studies here involved optical transparency, differential scanning calorimetry, and small angle light scattering. It was found that a 90 percent (cis) 1, 4 addition polybutadiene was immiscible with high (91 percent) 1,2 addition polybutadiene. Reduction of the 1,2 content to 71 percent induced an upper critical solution temperature (UCST) with the cis 1,4 polymer. Polybutadienes with 50 percent and 10 percent 1,2 contents were miscible above the crystalline melting temperature of the cis 1,4 polybutadiene. Immiscibility of the 91 percent 1,2 addition polymer was also found with a 10 percent 1,2 polybutadiene. The latter polymer also exhibits an UCST with the 71 percent 1,2 polymer. The results are used to interpret the characteristics of blends of polybutadienes of varying microstructure. 相似文献
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以F类粉煤灰为例,详细介绍了测定粉煤灰中烧失量的步骤、计算数学模型、影响测量不确定度的因素以及各项测量不确定度分量评定,人员、设备、材料、方法、环境都是影响测量不确定的因素。 相似文献
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The objective of the study was to explore the effect of the degree of deacetylation (DD) of the chitosan used on the degradation rate and rate constant during ultrasonic degradation. Chitin was extracted from red shrimp process waste. Four different DD chitosans were prepared from chitin by alkali deacetylation. Those chitosans were degraded by ultrasonic radiation to different molecular weights. Changes of the molecular weight were determined by light scattering, and data of molecular weight changes were used to calculate the degradation rate and rate constant. The results were as follows: The molecular weight of chitosans decreased with an increasing ultrasonication time. The curves of the molecular weight versus the ultrasonication time were broken at 1‐h treatment. The degradation rate and rate constant of sonolysis decreased with an increasing ultrasonication time. This may be because the chances of being attacked by the cavitation energy increased with an increasing molecular weight species and may be because smaller molecular weight species have shorter relaxation times and, thus, can alleviate the sonication stress easier. However, the degradation rate and rate constant of sonolysis increased with an increasing DD of the chitosan used. This may be because the flexibilitier molecules of higher DD chitosans are more susceptible to the shear force of elongation flow generated by the cavitation field or due to the bond energy difference of acetamido and β‐1,4‐glucoside linkage or hydrogen bonds. Breakage of the β‐1,4‐glucoside linkage will result in lower molecular weight and an increasing reaction rate and rate constant. © 2003 Wiley Periodicals, Inc. J Appl Polym Sci 90: 3526–3531, 2003 相似文献