fume hood

简明释义

排烟柜

英英释义

例句

1.She placed the hazardous materials inside the fume hood to prevent exposure.

她将危险材料放入通风柜内以防止暴露。

2.When working with volatile chemicals, always use a fume hood to ensure safety.

在处理挥发性化学品时，务必使用通风柜以确保安全。

3.The laboratory technician adjusted the fume hood to maximize airflow during the experiment.

实验室技术员在实验过程中调整了通风柜以最大化气流。

4.Before starting the reaction, make sure the fume hood is functioning properly.

在开始反应之前，请确保通风柜正常运作。

5.The fume hood should be kept clear of clutter to maintain proper ventilation.

为了保持良好的通风，通风柜应保持整洁无杂物。

作文

In modern laboratories, safety is of utmost importance, especially when dealing with hazardous materials and chemicals. One essential piece of equipment that plays a crucial role in ensuring safety is the fume hood. A fume hood is a ventilated enclosure that is designed to protect laboratory personnel from inhaling toxic fumes, vapors, or dust that may be generated during various chemical processes. It provides a controlled environment where experiments can be conducted safely while minimizing exposure to harmful substances.The primary function of a fume hood is to remove hazardous air contaminants from the workspace. When chemicals are used, they can release volatile organic compounds (VOCs) or other dangerous vapors into the air. Without proper ventilation, these substances can pose serious health risks to laboratory workers. The fume hood works by sucking in air through its front sash, which creates a negative pressure zone inside the hood. This airflow helps to capture and contain any harmful fumes, directing them away from the user and into a filtration or exhaust system.There are several types of fume hoods, including ducted and ductless models. Ducted fume hoods vent hazardous air outside the building, making them ideal for handling highly toxic or volatile chemicals. On the other hand, ductless fume hoods use filters to clean the air before recirculating it back into the laboratory. While ductless models are more versatile and easier to install, they may not be suitable for all applications, particularly those involving highly hazardous materials.Using a fume hood properly is essential for maximizing safety in the laboratory. Users should always ensure that the sash is at the recommended height and that the airflow indicator shows that the hood is functioning correctly. It is also important to keep the work area inside the fume hood organized and free of clutter to allow for optimal airflow. Additionally, users should never place their heads inside the fume hood while conducting experiments, as this can expose them to harmful fumes.Training is another critical aspect of using a fume hood effectively. Laboratory personnel should receive proper instruction on how to operate the hood, recognize its limitations, and respond to emergencies. Regular maintenance checks should also be conducted to ensure that the fume hood is functioning correctly and that filters are replaced as needed.In conclusion, the fume hood is an indispensable tool in laboratory safety, providing a necessary barrier between researchers and potentially harmful substances. By understanding how to use and maintain a fume hood, laboratory workers can significantly reduce their risk of exposure to toxic fumes and create a safer working environment. As science continues to advance, the role of fume hoods will remain vital in facilitating safe and effective research practices.

在现代实验室中，安全至关重要，尤其是在处理危险材料和化学品时。一个在确保安全方面发挥关键作用的基本设备是通风柜。通风柜是一种通风的封闭装置，旨在保护实验室人员免受在各种化学过程中可能产生的有毒烟雾、蒸汽或灰尘的吸入。它提供了一个可控的环境，在这个环境中可以安全地进行实验，同时尽量减少对有害物质的暴露。通风柜的主要功能是去除工作区内的有害空气污染物。当使用化学品时，它们可能会释放挥发性有机化合物（VOCs）或其他危险蒸汽到空气中。如果没有适当的通风，这些物质可能给实验室工作人员带来严重的健康风险。通风柜通过其前面窗帘吸入空气，从而在柜内创造一个负压区。这种气流有助于捕获和控制任何有害烟雾，将其引导远离用户并送入过滤或排气系统。有几种类型的通风柜，包括有管道和无管道的型号。有管道的通风柜将有害空气排放到建筑物外部，非常适合处理高度毒性或挥发性的化学品。另一方面，无管道的通风柜使用过滤器清洁空气，然后再将其重新循环回实验室。虽然无管道型号更灵活且更易于安装，但它们可能不适用于所有应用，特别是涉及高度危险材料的应用。正确使用通风柜对于最大限度地提高实验室的安全性至关重要。用户应始终确保窗帘处于推荐高度，并且气流指示器显示柜正常工作。此外，用户还应保持通风柜内部的工作区域整洁，以便最佳气流。此外，用户在进行实验时绝不可将头伸入通风柜内，因为这可能会使他们暴露于有害烟雾中。培训是有效使用通风柜的另一个关键方面。实验室人员应接受正确的操作培训，了解其局限性，并能够对紧急情况做出反应。还应定期进行维护检查，以确保通风柜正常运作，并根据需要更换过滤器。总之，通风柜是实验室安全中不可或缺的工具，为研究人员与潜在有害物质之间提供了必要的屏障。通过了解如何使用和维护通风柜，实验室工作人员可以显著降低接触有毒烟雾的风险，从而营造更安全的工作环境。随着科学的不断进步，通风柜在促进安全有效的研究实践中的作用将继续至关重要。