1、Fume Hood Training通风橱培训 Fume Hoods contd通风橱 All fume hoods at JR Laboratories have a minimum face velocity of 0.75m/s JR实验室所有通风橱最小表面速度是0.75米/秒 This accommodates WCB regulations for the required face velocity when working with carcinogens,or possible carcinogens in a fume hood这符合WCB法规中关于通风橱中使用致癌物质或可能
2、致癌物质表面速度的要求 Fume Hoods contd通风橱 A higher face velocity(0.75m/s)is not necessarily better再高的表面速度(0.75m/s)不一定好 An extremely high face velocity can cause turbulence and force the air back out toward the operator太高的表面速度可能导致扰动,使空气返吹向操作者 Fume Hoods contd通风橱 The face velocity will not be maintained if the
3、sash is placed above the certified markings on the fume hood如果窗框置于通见橱规定标记以上,就不能保持表面速度 The sash placement marking is certified by a professional to ensure a face velocity of 0.75m/s is maintained across the front of the fume hood窗框放置标记是由专业人员认定的,以保证在通风橱的前部表面速度保持在0.75m/s Fume Hoods contd通风橱 Leave sash
4、lowered when:将窗框拉下 Not attending experiment不需要人看管的实验 Overnight隔夜 Fume Hoods contd通风橱 Avoid rapid movement around the fume hood避免在通风橱周围快速移动 A technician walking rapidly past the front of a fume hood will cause turbulence in the air技术人员快速走过通风橱,会引起空气扰动 Result:Air from the inside of the fume hood is dra
5、wn out,and follows the technician后果:空气从通风橱中溢出,随操作人员的方向流动 Fume Hoods contd通风橱 All equipment/apparatus must be placed at least 6 inches behind the front of the fume hood所有设备/仪器须置于离通风橱门至少6英寸 Air flow is otherwise blocked and forced back out towards the operator否则阻碍空气流动,迫使空气流向操作人员 All fume hoods must ha
6、ve marking indicating the 6 inch position所有通风橱须标记6英寸位置 Fume Hoods contd通风橱 Large pieces of equipment must be raised a few inches off the work surface 大型设备需举高,离开工作表面几英寸 Allows air to travel underneath the equipment towards the lower baffle opening使空气在设备下面流向低隔板孔 Fume Hoods contd通风橱 DO NOT store anythi
7、ng in the fume hood that can be safely stored elsewhere in the lab不得在通风橱中存放可在实验室其它地方安全存放的物品 Clutter will cause turbulence of incoming air混乱放置将引起进入通风橱空气的扰动 Fume Hoods contd通风橱 DO NOT block the rear baffle opening不要阻塞后隔板孔 The baffle opening is the space where incoming air is exhausted out隔板孔是进气和排气通道 I
8、f this is blocked,the air has no where to go,causes turbulence,and can result in air being forced back out toward the operator如果被阻塞,空气无处可去,引起扰动,导致空气被迫流向操作人员 Fume Hoods contd通风橱 Baffles隔板 The back panels of a fume hood which provide opening for outgoing air通风橱后面的档板提供排气孔 Adjustable可调节 Lower baffle hea
9、vy solvents;Top baffle light solvents低隔板-易挥发溶剂,高档板-易挥发溶剂 Fume Hoods contd通风橱 DO NOT adjust baffle opening after certification by a professional专业人员确认后不要调整隔板孔 Baffles may only be adjusted if:隔板只能在下列情况下调整 A change in the room will affect the function of the fume hood房屋的变化可能影响通风橱的功能 Different types of
10、chemicals(heavy vs.light)will be used in the fume hood通风橱中不同类型的化学品 The safety officer is informed BEFORE adjustment is made调整之前通知安全员 Fume Hoods contd通风橱 Fume hoods are serviced every 6 months by H.H.Hawkins通风橱每六个月由H.H.Hawkins维护一次 Cleaning of baffles and inside of fume hood(in-house)清洁隔板和通风橱内部(实验室做)B
11、affle positioning check(H.H.Hawkins)隔板位置检查 Smoke Test(H.H.Hawkins)烟雾测试 Face velocity certification(H.H.Hawkins)表面速度核查 Fume Hoods contd通风橱 Three sizes of fume hoods通风橱的三种规格 3 ft:One person only can work in the fume hood at one time只容纳一个人使用 4ft:1.5 people can work in the fume hood at one time只容纳1.5个人使用 5ft:2 people can work in the fume hood at one time容纳2个人使用
