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GMP车间净化公司无尘车间气流特性

来源:http://www.henganjh.cn │ 发表时间:2019-07-17 

  室内气流检测是净化车间正常运行的检测手段之一。这是整个测试程序的一部分。为了稀释或消除室内悬浮污染,从而防止污染在室内积聚,房间内必须有足够的空气流量。所以必须检测流量。
  Indoor air flow detection is one of the means to detect the normal operation of the purification workshop. This is part of the whole test program. In order to dilute or eliminate indoor suspension pollution, and thus prevent the accumulation of pollution in the room, the room must have sufficient air flow. So traffic must be detected.
  在一个湍流的洁净室内,风的流动和混合是湍流的。为了确保污染物是清晰的,无尘车间的所有部件必须有良好的空气混合。
  In a turbulent clean room, the flow and mixing of wind are turbulent. In order to ensure that the pollutants are clear, all parts of the dust-free workshop must have good air mixing.
  在单向流动净化车间,为了保证最洁净的关键区域,空气供应直接来自高效空气过滤器。
  In the one-way flow purification workshop, in order to ensure the cleanest key areas, the air supply comes directly from the high efficiency air filter.
  GMP车间净化公司
  GMP Workshop Purification Company
  为保持净化车间垂直层流流向均匀,需要:
  In order to keep the vertical laminar flow direction uniform in the purification workshop, it is necessary to:
  (1)风速吹制时应无速度差;
  (1) There should be no velocity difference when the wind speed is blown.
  (2)底板回风盘吸力面风速无差异。速度过低或过高(0.2m/s, 0.7m/s)时产生涡流,速度为0.5m/s时气流均匀。目前洁净室风速在0.25 ~ 0.5m/s之间
  (2) There is no difference in the suction surface wind speed of the floor return disc. When the velocity is too low or too high (0.2m/s, 0.7m/s), the eddy current is generated, and when the velocity is 0.5m/s, the airflow is uniform. At present, the air speed in the clean room is between 0.25 and 0.5m/s.
  影响洁净室气流的因素很多,如工艺设备、人员、洁净室装配材料、照明电器等。同时还应考虑生产设备上方气流的分布点。
  There are many factors affecting the air flow in the clean room, such as process equipment, personnel, cleaning room assembly materials, lighting appliances and so on. At the same time, the distribution point of air flow above the production equipment should be considered.
  GMP车间净化公司
  GMP Workshop Purification Company
  表面的气流分叉点的操作平台或净化车间的生产设备应该位于一个2/3空间洁净室之间的空间和分区面板,这样气流就可以从内部流动过程领域的操作区域去除灰尘。如果分流器位于工艺区域的前端,则会成为不适当的气流分流。此时大部分气流会流向工艺区域,操作人员操作产生的粉尘会被带到设备后部,污染工作台,降低成品率。
  The operating platform of the air flow bifurcation point on the surface or the production equipment of the purification workshop should be located in a space and partition panel between two-thirds of the space clean rooms, so that the air flow can remove dust from the operation area of the internal flow process field. If the distributor is located at the front end of the process area, it will become an inappropriate air flow diversion. At this time, most of the air flow will flow to the process area, and the dust generated by operators will be brought to the back of the equipment, polluting the workbench and reducing the yield.
  工作台在车间净化等障碍物时,会在连接处出现涡流现象,相对其附近的清洁度会较差,在工作台钻回风孔时,会使涡流现象减小到最小;装配材料的选择和设备的完善也是决定气流是否变为涡流的重要因素。
GMP车间净化公司
  When the workbench is used to clean up obstacles such as workshop, eddy current will appear at the junction, which is worse than the cleanliness nearby. When the workbench drills the return air hole, the eddy current will be minimized. The selection of assembly materials and the improvement of equipment are also important factors to determine whether the air flow becomes eddy current.
  GMP车间净化公司
  GMP Workshop Purification Company
  洁净气流组织的一般要求如下:
  The General requirements for clean air distribution are as follows:
  1. 送进来的洁净空气可以尽快均匀分布或扩散到整个洁净区域,以稀释室内污染源的灰尘和细菌造成的空气污染,保持生产环境所需的清洁。
  1. The incoming clean air can be evenly distributed or spread to the whole clean area as soon as possible to dilute the air pollution caused by dust and bacteria from indoor pollution sources and maintain the cleanliness of production environment.
  2. 能迅速将污染源的灰尘和细菌清除到无尘车间,避免或减少涡流和死角,缩短灰尘和细菌在室内的时间,从而减少与产品接触的机会。
  2. It can quickly remove the dust and bacteria from the pollution sources to the dust-free workshop, avoid or reduce eddy currents and dead corners, shorten the indoor time of dust and bacteria, thereby reducing the chance of contact with products.
  3.考虑到室内温度、湿度均匀性等空调供应的要求以及工作人员的舒适性要求。由于主要任务与一般空调房不同,所以配风方案必然不同。
  3. Considering the requirement of air conditioning supply such as indoor temperature and humidity uniformity and the comfort requirement of staff. Because the main task is different from the general air-conditioning room, the air distribution scheme must be different.
  舒适的空调房间和生产车间的正常温度和湿度精度,空调气流组织方案的基本要点是采用大温差送风,以减少空气供给体积,使系统设备和管道小,降低初投资和操作费用。所以通常在夏季使用机器露点送风。
  Comfortable air-conditioning room and production workshop normal temperature and humidity accuracy, the basic point of air-conditioning air distribution scheme is to use large temperature difference air supply to reduce air supply volume, make system equipment and pipes small, reduce initial investment and operating costs. So dew point ventilation is usually used in summer.
  因为发送到空气和在室温下差异大,为了避免不均匀的温度室内生活区、工作区或满足,吹热风吹寒风不适,所以使用送风口端或前发送扩散器,需要风强烈的紊流系数,有一定能力的喷射器来帮助吸收空气的室内热湿负荷被吸收并融合到供应空气流动,使送风温度,湿度应尽快接近室内设计温度和湿度。
  Because the difference between sending to air and at room temperature is great, in order to avoid the uneven temperature of living area, working area or satisfaction, blowing hot air and cold wind is not comfortable, so the use of air outlet end or front sending diffuser requires strong turbulence coefficient of wind, and a certain ability of ejector to help absorb the indoor heat and moisture load of air to be absorbed and melted. When the supply air flows, the supply air temperature and humidity should be close to the indoor design temperature and humidity as soon as possible.
  当送风进入生活区和工作区处于回流状态时,温湿度由技术要求,已进入控制精度范围;从人类的角度来看,它也是柔软的,可以接受的。普通空调房侧送风侧回风、送风侧附射流是空调房典型的配风方案。
  When the air supply enters the living and working areas in the reflux state, the temperature and humidity have entered the control precision range from the technical requirements; from the human point of view, it is also soft and acceptable. The return air on the side of supply air and the additional jet on the side of supply air are the typical air distribution schemes of air conditioning rooms.
  GMP车间净化公司
  GMP Workshop Purification Company
  空调房间的气流分布除吸力面上升气流外,还存在大量的旋涡。这种上升气流与粉尘、细菌受重力向下运动方向相反,粉尘、细菌会随着气流上升,一些较大的粉尘颗粒会明显滞后于气流,室内滞留时间会更长。漩涡还会促使灰尘和细菌在房间里打转,而不是迅速地离开房间。这一切都不同于洁净气流组织的原理。
  The air distribution in air-conditioned rooms has a large number of vortices besides the updraft on the suction surface. The upward airflow is opposite to the downward movement of dust and bacteria under gravity. Dust and bacteria will rise with the airflow. Some larger dust particles will obviously lag behind the airflow, and the indoor retention time will be longer. The whirlpool also causes dust and bacteria to move around the room rather than leaving the room quickly. All of these are different from the principle of clean air distribution.
  无尘车间气流形态无尘车间气流形态主要分为两大类。一种是非单向流动,称为正常流型或湍流流型。另一种是单向流动,过去称为层流型。经常清洁车间不同区域有不同的洁净度要求,所以经常将前两种流型结合起来。要求高的部分采用单向流,房间其他部分采用非单向流。
  The airflow pattern of dust-free workshop is divided into two main categories. One is non-unidirectional flow, which is called normal flow pattern or turbulent flow pattern. The other is one-way flow, which used to be called laminar flow pattern. Often cleaning workshop has different cleanliness requirements in different areas, so the first two flow patterns are often combined. One-way flow is used in the demanding part and non-one-way flow is used in other parts of the room.
  这种气流分布称为混合流型。例如,在风恒定的浇注密封车间,只有所谓的洁净盖设置在浇注密封位置的上方,使单向气流向下。但大多数车间仍采用非单向流回风方式。此外,还有一种更特殊的气流分布形式,称为矢量流或辐射流,也称为斜流型。它应该是一种非单向流动,但它具有接近水平单向流动的效果,结构上比单向流动简单得多。特别是在美国,制药公司更常用。非单向流动适用于制药厂大部分无尘车间。送风和回风最典型的配风形式是上送风和侧下回风。
  This air distribution is called mixed flow pattern. For example, in a wind-invariable pouring and sealing workshop, only the so-called clean cover is located above the pouring and sealing position, which makes the one-way air flow downward. However, most workshops still adopt non-unidirectional return air flow. In addition, there is a more special form of airflow distribution, called vector flow or radiation flow, also known as oblique flow pattern. It should be a non-unidirectional flow, but it has the effect of approaching horizontal unidirectional flow and is much simpler in structure than unidirectional flow. Pharmaceutical companies are more commonly used, especially in the United States. Non-unidirectional flow is suitable for most dust-free workshops in pharmaceutical factories. The most typical air distribution forms of supply air and return air are upper supply air and side return air.
  虽然带有孔板扩压器的高效能风口有利于洁净空气在送风车间的扩散,但位于高效能风口正下方、所谓主送风区域中心的风口的洁净程度一般显著高于周边区域。周边地区的空气供应到室内,不断吸入室内空气污染,气流部分继续扩大覆盖的部分,至于邻风口之间的空气供给或房间的四个角落未能覆盖的部分清洁会更糟。
  Although the high efficiency tuyere with orifice diffuser is beneficial to the diffusion of clean air in the air supply workshop, the cleanliness of the tuyere located directly below the high efficiency tuyere and in the center of the so-called main air supply area is generally significantly higher than that in the surrounding area. The air supply in the surrounding area is supplied to the room, and the indoor air pollution is continuously inhaled. The air flow part continues to expand the coverage part. The air supply between the adjacent air outlets or the parts that are not covered in the four corners of the room will be worse.
  以上是GMP车间净化公司为大家整理的相关内容,想要了解更多内容,欢迎访问网站:http://www.henganjh.cn
  The above is the related content of GMP workshop purification company. For more information, please visit the website: http://www.henganjh.cn.

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