滤筒式通风除尘装置故障分析与设计改进

大型矿用挖掘机滤筒式通风除尘装置的工作原理是在系统风机的作用下,将含尘气流通过滤筒过滤,把清洁空气送入机棚内;同时,在滤筒上的灰尘通过脉冲阀清灰,落入灰斗被连续排出。本文对该装置在实际应用中发生的故障进行分析,从设计结构入手,对装置底架钢结构、风帽结构及其支撑、系统风机室结构、风机安装底座、螺旋输送机等进行了优化设计,优化除尘器的清灰方式,对滤筒系统的控制程序进行了合理的调控。改进后的滤筒式通风除尘装置普遍应用于系列大型矿用挖掘机的工作中,为提高大型挖掘机的出铲率提供可靠保障。     

高效滤筒除尘器在矿山除尘系统中的应用

矿山开采过程中,矿石粗破碎、转运、筛分等流程产生大量粉尘,需设除尘器进行除尘。高效滤筒除尘器具有净化效率高、过滤面积大、除尘阻力小等优点,已广泛应用于水泥、钢铁、电力、食品、化工等领域。目前,滤筒除尘器处理矿山粉尘的研究和应用处于起步阶段。以国内某大型新建矿山除尘系统为例,研究滤筒除尘器在矿山除尘系统中的应用效果。     

脉冲喷吹滤筒除尘器在低尘环境中的性能测试

为拓宽脉冲喷吹滤筒除尘器的应用范围,开展了脉冲喷吹滤筒除尘器在低浓度粉尘环境中的性能测试,测试结果表明,脉冲喷吹滤筒除尘器在低浓度粉尘环境下的除尘效率可达99.99%,对低浓度粉尘具有很好的除尘和净化效果,说明脉冲喷吹滤筒除尘器在低浓度粉尘环境中应用时具有可行性和可靠性。     

大型挖掘机机棚设计的考虑因素

机棚是大型挖掘机的部件之一，挖掘机的一些重要的机器部件和设备等都放在机棚内，这就要求机栅的设计不但要求是封闭式的，而且还要求是防风、防雨、防尘和保温的。为保持机棚内空气清洁，在机棚的后部设有除尘装置，在除尘装置中有风机，通过其将新鲜空气吹入机棚内，使机棚气压增高，造成超高微压，形成气封，使外面空气从各缝隙不能进入机棚内部。这就要求机棚各缝隙的设计要加胶皮密封，棚内气体可通过机棚前壁排出，用以冷却起重臂推压电机。这样，就形成了一个对流，任凭外面刮风下雨，粉尘都无法进入机棚内，从而减少磨损，延长机器寿命。     

WK-10型挖掘机机棚、司机室增压净化系统的试验研究

大型挖掘机是露天采掘设备,特别是在深凹露天矿采场工作时,粉尘严重,致使司机室内粉尘浓度超过国家卫生标准。若不采取相应的防尘措施,将严重危害工人身体健康,矽肺病已成为司机的职业病之一。同时,司机室内夏天炎热,冬天寒冷,为改善司机的工作环境进一步提高生产率,研制空调除尘装置已成为当务之急。挖掘机的一些重要机械部件和电气设备都布置在机棚内,机棚除防风防雨外,还应具有防尘、保温性能。为保持机棚内空气清洁,国     

岩巷掘进工作面控风净化除尘系统设计与应用

针对岩巷掘进工作面压风风流携带迎头粉尘弥漫扩散造成粉尘治理难度大的问题,提出了掘进面“控风—净化”综合粉尘治理方案,构建了由湿式旋流除尘器、易装拆控尘装置、便移式负压风筒等组成的岩巷掘进面高效除尘系统,对比分析了除尘系统的不同安装方案对除尘效果的影响;综合考虑现场除尘效果与劳动强度,明确了湿式旋流除尘器最佳安装方案以及负压风筒与控尘装置的最优安装位置。在某矿辅运大巷岩巷掘进面进行了现场应用,结果表明:当负压风筒安装至通风风筒对侧,吸尘口距巷道迎头3 m,控尘装置位于通风风筒压风口后方5 m时,迎头高浓度粉尘在通风风筒压风、控尘装置控风及除尘器抽尘共同作用下被控制在迎头附近,并不断向负压风筒吸尘口运移最终被除尘器抽入净化,除尘器前方全尘和呼尘除尘效率分别达到95.9%和94.9%以上,除尘器后方全尘和呼尘除尘效率分别达到96.5%和95.4%以上,显著提升了巷道可见度,有效解决了岩巷掘进面通风造成的粉尘治理难题。     

除尘器在挖掘机及焦化设备中的应用

除尘器是通风除尘系统中的主要装置,文中介绍了除尘器的分类及各类的除尘特点,详细阐述了除尘器在挖掘机和焦炉两种设备中的应用,并分析了除尘器的除尘原理。说明设计选用合适的除尘器对于提高除尘效率、保证机器的正常运转、改善工作环境、延长产品使用寿命起到重要的作用。同时指出应结合产品研究设计选用更加合理的除尘装置。     

新型湿式除尘器的研制及其应用

针对国内机掘工作面的生产条件,研制了高效实用的湿式除尘器,并对该种除尘器的结构、除尘原理以及在掘进工作面的安装和使用方法进行了详细的分析和研究。现场实测表明,由该种除尘器组成的通风除尘系统,能有效地降低机掘工作面和巷道中的粉尘浓度,特别是呼吸性粉尘浓度。     

用湿式涡流除尘器清除气流中的钾盐粉尘的试验

为了选用更有效的除尘装置以消除钾盐粉尘,在全面模拟实际生产的条件下,进行了型除尘器的试验。在实验室试验台上进行型4号除尘器的研究(见图)。该试验台装置由直陉500毫米的管道4、BO-5型通风机3、盘     

小型移动式滤筒除尘器的设计

小型移动式滤筒除尘器是一种适用于各类工矿企业的空气除尘设备。该除尘器属于沉流结构的除尘器,它利用气流向下流动时速度及方向的改变去除空气中的粉尘。以某小型移动式滤筒除尘器为研究对象,讨论了除尘器的工作基本原理并进行结构设计。对除尘器风机的重要参数即风机全压进行了重点分析与计算。最后实际测试表明,机组的除尘效率达99.8%以上,符合设计要求。     

Market and recycling of NiMH battery

<正>Market status and future trend of NiMH battery1.Global market of small NiMH battery Global market size of small NiMH batteries declined year on year since 2011.The trend will continue to 2018,at the rate of 5%to 10%annually.Demand for small NiMH batteries will be stable gradually.Many electrical apparatuses are powered by the built-in lithium battery today,which is the main reason for the shrunk market of small NiMH batteries.But,for some products,small NiMH     

China rare earth market review

正September 1-10,2014 Affected by the National Day holiday,rare earth transaction was stagnant and the market showed a weak steady state.As there was no good news for downstream market,some products with flat demand would likely rally slightly for some time to     

Current situation and future trend of China rare earth luminescent material industry

<正>Rare earth luminescent material is one of the most important application sectors of rare earths.China enjoys the exceptional advantage to develop rare earth luminescent material for its abundant rare earth resources.After several decades'endeavor,China's rare earth luminescent material industry,headed by rare earth phosphor for lamp and LED and high efficient rare earth energy-saving light source,has been gradually developed into a scale industry.China has become a major production base of rare earth phosphor for lamps and rare earth     

China rare earth market review

正June 1~10,2014Rare earth market remained weak.Quoted price of rare earth products was similar to that in May.There was no sign of recovery in downstream market.The market of NdFeB magnetic materials and phosphor was depressed.Catalyst,polishing powder and ceramic industries remained inactive.Demand from downstream industry was soft.Consumers purchased on their needs.Suppliers had strong intention to sell.Prices of rare earth products     

2014 second batch of rare earth quota released

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China rare earth market review

正November 21~30,2014Due to weak demand from downstream industries,transactions of rare earth in Chinese domestic market were inactive.It was difficult to sell any rare earth products except for dysprosium oxide and terbium oxide.Suppliers lost confidence in recent market.Demand for rare earth products was soft.Consumers continued to take a wait-and-see attitude.Rare earth export market remained slow.     

Galaxy Magnets achieved the net profit of 34.02 million yuan in the first six months of 2014

正Galaxy Magnet announced its financial results for the first half of 2014 on August 14.For the first six months ended on 30 June 2014,Galaxy Magnet achieved operation income of RMB 182.3 million,up8.40% over the same period of 2013,and the net profit attributable to the shareholders of the listed company of 34.02 million yuan,increasing 35.49% over the same period of last year.Stable performance increase was led by development of new customers and application market of magnets.     

Rare Earth Application in Steel in China

<正>China has rich rare earth resources.Output of rare earth and steel in China ranks the top first in the world.However,there is still certain distance between the steel produced in China and developed countries from the point of varieties and quality.China still has to import some types of steel.Improving the quality should be emphasiZed in future development of steel industry in China.Rare earth can be used to upgrade traditional steel     

Current situation and future trend of China rare earth luminescent materialindustry(continued)

<正>Developing ecological lighting source The world is facing the big problem of energy shortage today and the contradiction between economy development and environmental protection is worsened.Therefore,people are more likely to choose an ecological light source that is more energy efficient and environmental friendly.The choice provides great opportunity for the development of rare earth optical material industry in China.The concept of green lighting positions rare earth luminescent material as a leading player in illumination market.The light source of both rare earth luminescent lamp and LED lamp is ecological and energy saving.This is why     

稀散金属产业的观察与思考

分析了近年来国内外稀散金属产业的生产、应用、资源与市场状况.铟锡氧化物靶材、砷化镓晶片、锗红外材料、铼高温合金和硒在电解锰及玻璃的应用等已成为稀散金属的主要应用领域.稀散金属的产量快速增长达到历史高位而导致了市场的失衡.以GaInP_2/GaAs/Ge,CIGS和CdTe为代表的非硅系太阳能电池是稀散金属的新兴应用领域,将给稀散金属带来日益增长的需求.