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  • 实验室装修中的废气处理怎么做?
    来源:最新澳门网址大全 浏览: 发布日期:2019-11-18
      1. 有机废气采用活性炭吸附法,吸附效率高达90%。
      1. The adsorption efficiency of organic waste gas is up to 90% by using active carbon adsorption method.
      (1)活性炭吸附原理
      (1) adsorption principle of activated carbon
      活性炭是一种微晶碳材料,主要由外观黑色的碳材料制成,内部孔隙结构发达,比表面积大,吸附能力强。活性炭材料中存在大量看不见的微孔,1克活性炭材料微孔,其膨胀后表面积可高达800-1500平方米,尤其高。换句话说,一粒米大小的活性炭颗粒的内部表面积可能相当于一个客厅的大小。正是这些高度发达的,如人体毛细血管一样的空隙结构,使活性炭具有良好的吸附性能。分子间的结合称为范德华力。虽然分子的运动速度受到温度和物质等因素的影响,但在微环境中,它始终处于恒定的运动状态。由于分子之间的相互吸引,当一个分子被活性炭的内孔吸附到活性炭的内孔中时,由于分子之间的相互吸引,会吸引更多的分子,直到活性炭的内孔被填满。
      Activated carbon is a kind of microcrystalline carbon material, which is mainly made of carbon material with black appearance, with developed internal pore structure, large specific surface area and strong adsorption capacity. There are a lot of invisible micropores in the activated carbon material, and the surface area of the micropores can be as high as 800-1500 square meters, especially high. In other words, the internal surface area of a rice sized activated carbon particle may be the size of a living room. It is these highly developed pore structures, such as human capillaries, that make the activated carbon have good adsorption performance. The combination of molecules is called van der Waals force. Although the velocity of the molecule is affected by temperature and substance, it is always in a constant state in the micro environment. Due to the mutual attraction between molecules, when a molecule is adsorbed into the inner hole of the activated carbon by the inner hole of the activated carbon, more molecules will be attracted until the inner hole of the activated carbon is filled due to the mutual attraction between the molecules.
      (2)活性炭解吸法
      (2) activated carbon desorption
      当活性炭的空隙被有机废气填充并达到饱和时,污染物开始释放。这种现象称为渗透。饱和活性炭吸附床需要再生。通常采用加热气体对吸附床进行脱附。一方面,吸附床的再生被再次激活;另一方面,污染物被释放出来循环利用或分解。这种解吸方法称为温度解吸。吸附量随温度的升高而降低。通过提高吸附剂的温度,被吸附的组分可以被解吸。这种方法也称为变温解吸。
      When the gap of activated carbon is filled with organic waste gas and reaches saturation, pollutants begin to release. This phenomenon is called infiltration. The saturated activated carbon adsorption bed needs regeneration. The adsorption bed is usually desorbed by heating gas. On the one hand, regeneration of the adsorption bed is reactivated; on the other hand, pollutants are released for recycling or decomposition. This desorption method is called temperature desorption. The adsorption capacity decreased with the increase of temperature. By increasing the temperature of the adsorbent, the adsorbed components can be desorbed. This method is also called variable temperature desorption.
    实验室装修中的废气处理怎么做
      2. 采用液体吸附法可使无机废气的吸附效率达到90%以上。液体吸收是净化无机气体的常用处理技术。以液体为吸附剂,通过洗涤收集装置将废气中的有害成分吸收到液体中,达到净化的目的。吸收系统属于气膜控制吸收的过程。工作时,吸收液体喷洒均匀填料层的顶部通过喷雾设备顶部的包装层,和流像一个电影包装层,而废气进入塔的底部和放电通过填料层从塔顶。在这个过程中,废气被迫多次改变它的方向和速度,不断碰撞与吸收液接触,所以废气和吸收液充分接触反应时间在包装层,这样可以完全吸收废气中的有害成分吸收液和纯化。净化后的气体经塔内除霜后可达标排放。
      2. The adsorption efficiency of inorganic waste gas can reach more than 90% by liquid adsorption. Liquid absorption is a common treatment technology to purify inorganic gas. With the liquid as the adsorbent, the harmful components in the waste gas are absorbed into the liquid through the washing collection device to achieve the purpose of purification. The absorption system belongs to the process of gas film control absorption. When working, the liquid is sprayed onto the top of the uniform packing layer by spraying the top packaging layer, and the flow is like a film packaging layer, while the exhaust gas enters the bottom of the tower and discharge through the packing layer from the top of the tower. In this process, the exhaust gas is forced to change its direction and speed for many times, and constantly collide with the absorption liquid. Therefore, the reaction time of the exhaust gas and the absorption liquid is in full contact with the packaging layer, so that the harmful component absorption liquid in the exhaust gas can be completely absorbed and purified. The purified gas can be discharged after defrosting in the tower.
      3.根据实验室产生的废气类型,处理方案采用活性炭吸附与组合。用活性炭吸附有机污染物,再用填料喷雾塔吸附无机污染物。
      3. According to the type of waste gas produced in the laboratory, the treatment scheme adopts activated carbon adsorption and combination. Organic pollutants were adsorbed by activated carbon, and inorganic pollutants were absorbed by packed tower.
      的原因是:
      The reasons are:
      实验室无机废气基本上以酸性废气为主,工业生产中普遍存在碱性废气。而PH值对活性炭吸附效率的影响一般随溶液PH值的增加而减小。当PH值大于9.0时,吸附不容易。因此,先用活性炭吸附,再用填料喷雾组合。
      The inorganic waste gas in laboratory is mainly acid waste gas, and alkaline waste gas is common in industrial production. The influence of pH value on the adsorption efficiency of activated carbon generally decreases with the increase of pH value of solution. When pH value is greater than 9.0, adsorption is not easy. Therefore, the activated carbon was first adsorbed and then filled with spray.
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