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排烟气流在管道内的流速的相关问题

来源:/添加时间:2018-07-23 15:33:43
在噪声控制要求高的场合,应选用低噪声通风管道设备。不同型号的通风管道设备在同一的风量、风压下、机翼型叶片的离心通风设备噪声小,前向版型叶片的离心通风设备噪声大。适当降低通风设备的转速。通风设备的旋转噪声与叶轮圆周速度10次方成比例,涡流噪声与叶轮圆周速度6次方或5次方成比例。设计通风系统时,应尽量减少系统的压力损失。当通风系统的总量和压力损失较大时,可将其分为小系统。气流在管道内的流速不宜过高,以免引起再生噪声。
Low noise ventilation duct equipment should be selected in the occasion of high noise control requirements. The noise of the centrifugal ventilation equipment in the same air volume, wind pressure and wing type blade is small, and the centrifugal ventilation equipment of the front plate type blade is noisy. Reduce the speed of the ventilator properly. The rotating noise of ventilation equipment is proportional to the 10 th power of impeller circumferential velocity and the swirl noise is proportional to the 6 th or 5 th power of impeller circumferential velocity. When designing the ventilation system, the pressure loss of the system should be minimized. When the total amount of ventilation system and pressure loss is large, it can be divided into small systems. The velocity of air flow in the pipeline should not be too high, so as not to cause regenerative noise.
济南厨房排烟管道
在排烟系统中,发生火灾时,排烟阀开启,进行排烟,为了截断高温烟气在排烟管路中流动,防止火势蔓延到另一防火分区,当排出的烟气温度达到280℃时,排烟防火阀、排烟口上熔断器动作,阀门必须自动关闭,阻止排烟。由此可见,防火阀、排烟阀做到了该通则通,该断则断的隔烟阻火作用。沈阳排烟管道不仅有排烟机机械排烟,还有送风机机械送风,这种排烟方式通常被行业内的人士称之为全面通风排烟方式。由于这种机械排烟方式给控制区送入了大量的新鲜空气,为避免产生助燃的影响,它不适用于应用在着火区域,可用于非着火的有烟区,系统运行时可使系统的送风量稍大于排烟量,使控制区显微正压。该排烟方式的优点是防烟排烟效果好、稳定可靠,不受任何气象条件的影响从而确保控制区域的安全,缺点是需要送、排风两套机械设备。投资较高。耗电量也较大。
In the smoke exhausting system, the exhaust valve opens and exhausting, in order to intercept the flow of the high temperature smoke in the exhaust pipe and prevent the fire from spreading to another fire zone. When the exhaust gas temperature reaches 280 degrees C, the smoke exhaust valve and the fuses on the exhaust port must be closed automatically to prevent the exhaust. It can be seen that the fire prevention valve and smoke exhaust valve have achieved the general principle, which is the function of smoke isolation and fire suppression. The Shenyang flue gas pipeline not only has mechanical exhaust smoke exhauster, but also the mechanical air supply of the fan, which is usually called the comprehensive ventilation and exhaust mode by the people in the industry. In order to avoid the effect of combustion, it can not be applied to the ignition area, and can be used in the non ignition area. The system can make the air supply amount a little greater than the smoke discharge and make the control area slightly positive pressure. The advantage of this method is that the smoke and smoke control effect is good, stable and reliable, without the influence of any weather conditions to ensure the safety of the control area, the disadvantage is that two sets of machinery equipment need to be sent and discharged. The investment is high. The power consumption is also large.
防火阀的作用一个复杂的送风排烟系统,管路错综复杂。在送风系统中,送风机送出的风必须通过主管道分配到各支管中去;在排风或排烟系统中,风或烟由各支管汇集到主管道后进入排风机排出。那么,无论是送风系统或排烟系统中,如果没有任何阻挡的话,送风量和排烟量就无法控制,不需要送风或排烟的部位出现大量送风、排烟的情况,而需要送风或排烟的部位却不送风、排烟或只是少量送风、排烟。为了把不需要送风、排烟部位的管路切断,这就需要阀门装置。
The function of the fire damper is a complicated air supply and exhaust system, and the pipeline is complicated. In the air supply system, the wind sent by the fan must be distributed through the main pipe to each branch pipe. In the exhaust or smoke exhaust system, the wind or smoke is collected from the branches to the main pipe and enters the exhaust fan. So, whether it is in the air supply system or smoke exhaust system, if there is no obstruction, the air supply and smoke discharge can not be controlled. There is no need to send a lot of air or smoke in the parts of the air or smoke, but the air, smoke or only a small amount of air and smoke are not required. In order to cut off the pipes which do not need air supply and smoke exhaust, the valve installation is needed.
济南厨房排烟管道十多年来一直致力于厨房排烟设备的研究和生产 ,解决用户的真正的使用问题使我们坚持的责任。
Ji'nan kitchen exhaust pipe has been committed to the research and production of kitchen equipment for more than 10 years, and it is our responsibility to solve the problem of users' real use.

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