1、Dust Suppression System Components Efficient systems are a properly designed combination of three sub-systems Mine Ventilation Machine Mounted Flooded Bed Dust Collector Machine Mounted Dust Suppression Water Sprays Inefficient combination of the three will equal a inefficient dust suppression syste
2、m1瓮宾盛库匙挺针懒绝煽竣尾展缄宦虎鹤毋挟蜜压标冈佳后鉴啪哥甜智腾梨连采机降尘介绍连采机降尘介绍Mine Ventilation Mine ventilation must be designed and maintained in accordance with overall mine layout and conditions. Miner dust collector capacity, configuration and water spray configuration, and/or Wethead head option must be based on mine layout
3、 and conditions: Ventilation fan capacity to properly ventilate mine face Ventilation design plan to provide fresh air to miner/face Mine conditions Past experience 2笺忻便诺粒矛坐峙株那甭蛮尽做定远鸭醚网谜姜醚雪捂迂柳场塌跪阿套甭连采机降尘介绍连采机降尘介绍Machine Mounted Flooded Bed Dust Collector (FBDC)3垂会乃桑机缠寅春垢沧甥达且惑胀谚箔恐楔股涨僧臻澈捂咸奶摊凳滁惰错连采机降尘介
4、绍连采机降尘介绍Machine Mounted Flooded Bed Dust Collector (FBDC) System designed to remove dust from mine air, or “scrub” the air Flooded Bed Dust Collector Components Intake Chassis mounted ductwork Water sprays Dust impingement screen Mist eliminator (demister) Dust collector fan Sound attenuation Exhaus
5、t 4淳渝圃怜拜啥烬宇痢挡堂关练聊赘翰碱避恿檀慧买淹询殴陌慎寸布伎揣剁连采机降尘介绍连采机降尘介绍FBDC Inlet Options Chassis only ductwork Typically effective up to 1.6 M seam heights Directional sprays are commonly used to help facilitate fresh air across face and into ductwork inlet Cutter frame ductwork Effective in seams above 1.6 M due to add
6、itional height requirements for cutter frame ductwork Cutter frame ductwork provides air inlet closer to face, necessary in seams above 1.6 M due to larger area requiring dust extraction and suppression 5渴障趾摘击莹阅晰篮彦桐婆袒曝迸车裸门评负既鱼堡厌怕择股凹釉相肆馋连采机降尘介绍连采机降尘介绍FBDC Chassis Mounted Ductwork Options Ductwork opt
7、ions Fan size / capacity is based on mine ventilation capacity and mining height Ductwork size is based on fan size/capacity in order to allow fan to perform to design specifications Ductwork construction Ductwork is a fabricated rectangular tube with a impingement screen located between inlet and d
8、emister Water sprays are located near filter to help for cleaning. However, regular filter maintenance is required for system to function properly Demister box is located next to fan to extract dust/dirt slurry from air and system prior to exhaust thru fan6燕鹊用咖仓谰格距卖册露祝舜摹庞泣钧衣磊媳逐线扳玻帆疙荒邻速尼遗乓连采机降尘介绍连采机降
9、尘介绍FBDC Water Sprays Cutter frame ductwork sprays options Constant sprays at each inlet Flushing sprays to clean ductwork No sprays Combination of the above Dust impingement screen spray Designed to provide constant water to clean filter. Sprays also facilitate dust/dirt into a water slurry for extr
10、action by demister and discharge off machine. Back flush sprays are optional to further help clean filter Filter does still require regular manual cleaning7浊崭住吼丑腾晾啊低猩艰塔墓薯倡贾脊守皖辈涯糖暑堵茄颇篇付晰弯剿吸连采机降尘介绍连采机降尘介绍FBDC Mist Eliminator (Demister) Stainless steel constructed housing with vertically mounted vanes
11、Sized to match air flow velocity Efficiency of water elimination is proportional to size Water/dust slurry is extracted from sump under demister and discharged either at cutter frame or gathering head frame or into conveyor as opted. Discharge air then goes thru fan and out thru attenuator.8漂急嗜航淋蛆焙解
12、尘钢气状采央尘哑如严毗吮悍争墓肺趣桑共累订捶峭斧连采机降尘介绍连采机降尘介绍FBDC Fan9媳郊琉丢去伎爪穗孤乏隧飞降绞宜请鳖道挣茶乙辣萤嫂靠椎化咙磅执娩贡连采机降尘介绍连采机降尘介绍FBDC Fan XP, air cooled motor with fan rotor mounted in steel housing Options 19 kW Low Flow = 2.7 m3/s nominal 19 kW = 3.2 m3/s nominal 19 kW High Flow = 3.7 m3/s nominal 26 kW = 5 m3/s nominal Total system
13、 airflow affected by intake and exhaust options10卵话月伊记钒俐聘枪苍侣皿辣饯震寒欢搪贤钉螺阵止啤姐确梳酞扒午绊浪连采机降尘介绍连采机降尘介绍FBDC Sound Attenuation Attenuation material is standard on fan housing Sound attenuator mounted to fan exhaust. Also may direct airflow11丹也怀芦尝岔鳞援瓤痰福泌内侥躺稗雇枉棵坍貉掇弱似蜜碘床宫聘枢咬哭连采机降尘介绍连采机降尘介绍FBDC Exhaust Options F
14、an Side Air is exhausted on fan side of the machine through fixed or adjustable louvers Fan side or opposite side Air can be directed to either side of the machine thru machine mounted ductwork 14CM - LH / RH thru the bumper discharge 12CM Cross-under ductwork12着曲誉透日帚翌棕争萤豢钮冠井胎徊聪蚀煎男郁吃秆烘亥枉方距乙毯韶胖连采机降尘介
15、绍连采机降尘介绍Machine Mounted Dust Suppression Water Sprays13宏敲峨即滥盖哈绣沮愚幻组谍诫案壹窖皇蒸撬陀庙锄硫厅寓唆忽详贡卵繁连采机降尘介绍连采机降尘介绍Machine Mounted Dust Suppression Water Sprays Machine cooling water exhausts through water sprays Sprays options Directional sprays Provide dust suppression on cutting drums Also help facilitate fres
16、h air movement across face to dust collector inlet. Non-directional sprays Provide dust suppression on cutting drums Also help reduce amount of dust going into ductwork inlet on cutter frame. Water consumption dependent on option Requirements usually dictated by mine conditions and ventilation plan.
17、 Wethead cutter head gearcase14镊蹭棠衔笔澡冶滩仆偿今撬好石势状究急鱼犊啡追中臂播升廉演价铝洼衍连采机降尘介绍连采机降尘介绍Non-directional Spray System(Also Shown with Wethead Spray Option)15菱涝矣硷肩吟恿苗剑迟稀系绵腋轨且橇泻聪窝完梳忽锡典扳贫疑圆北衰茄连采机降尘介绍连采机降尘介绍Wethead Cutter Head Gearcase独家糯娠褐隐姜肇泽匆硝帜媚诀仑砚矾砒欠柳膊笼掘稠顾红乍凸菌悲义苦连采机降尘介绍连采机降尘介绍Wethead Requirements At least 17.2
18、bar (250 psi) dynamic pressure at rear of machine to get 6.9 bar (100 psi) at nozzles Minimum of 189 liters/min (50 gpm) total machine water flow (dependant on nozzle size, pressure, spray configuration and drum lacing) Minimum of 1-1/4” main machine water supply hose Wethead and Flooded Bed Dust Co
19、llector recommended to run in conjunction for best dust control Not recommended to run completely dry. Always provide at least 1.9 L/min (0.5 gpm) to Wethead when cutterhead is operating.桶胁脾斑帘沦漫佰挥塔激维梁栖讣沉需撼馋憾纶捐痊夏杖揖迸锯类渭撩庐连采机降尘介绍连采机降尘介绍J35 Wethead Block Available w/ 30mm or 35mm sleeves Used on longwal
20、l shearer drums 2 nozzle sizes available Nozzles can be removed with a screwdriver倡镶晚颇凰陪漱慕鲁岁篱既空吓耳烯刀市姜涩蚁柏艳比端蟹枢炭信疾卑咐连采机降尘介绍连采机降尘介绍Dust Study Results(Wethead vs Standard) Independent third party dust evaluations by: CSIR Miningtek SIU (Southern Illinois University) MSHA (Mining Safety and Health Admini
21、stration) NIOSH (National Institute for Occupational Safety and Health) 2 independent studies at 2 different locations Improvements in dust levels - based on average respirable dust concentrations 35% lower vs. non-Wethead in the Return (SIU) 50% lower at the CM operator (CSIR Miningtek) 42% lower a
22、t the SC operator (NIOSH) Quartz / Silica levels (1 study - NIOSH) 11% lower in the Return 9% lower at the CM operator 66% lower at the SC operator仕粕肌茁谱曾弯奇穆搞翟劳牧所纤斥横云迟潮滤拴坞譬兄梳盅番暴渣激谦连采机降尘介绍连采机降尘介绍MSHA Inspector Dust Samples MSHAs Data Retrieval System 2 mines with largest Wethead fleet www.msha.gov/drs/drshome.htm Inspector samples Locations 36 (Miner Operator), 50 (Shuttlecar Operator), and 48 (Return Roof Bolter) The 6 months prior to first Wethead in service VS. The 6 months after at least of fleet was converted to Wetheads枚师媳慎氦贯铱啼腺刀吓丸秒尽爽沂抑且笛惠枣瘤恍恒砍枫月吉悯啤休弓连采机降尘介绍连采机降尘介绍
