FFU (Fan Filter Unit) refers to a fan-powered filtration device commonly used in cleanrooms and other controlled environments to purify air. It typically consists of a fan, filter, and housing components. By utilizing efficient filters or ULPA filters, FFUs remove particles such as dust and bacteria

There are multiple types of chemical filters, each with its unique design and application. Here are some common types:1. Packed Bed Chemical Filters: This is the most common type, available as either a cabinet-embedded or duct-connected filter. Packed bed filters consist of a pipe with a filter core

This article discusses the important role of chemical filters as specialized filtering devices in the fields of environmental protection and industrial production. Operating on adsorption principles, chemical filters effectively capture and immobilize harmful chemicals in gases, thus protecting the environment, human health, and industrial production safety. In environmental protection, chemical filters are utilized for air purification, removing harmful substances from waste gases to reduce environmental pollution. In industrial production, chemical filters play a crucial role in systems like fresh air treatment, safeguarding production equipment safety, product quality, and reducing emissions. In summary, the key function of chemical filters is to filter and purify harmful chemicals in gases, providing vital support for environmental protection and industrial production.

Chemical filters are essential tools for removing or converting harmful chemical substances from the air stream. This article provides an in-depth analysis of chemical filters, covering their principles, materials, efficiency analysis, applications, considerations, safety measures, environmental impact assessment, and future trends.

The primary principle of chemical filters lies in utilizing specific chemical reactions or physical adsorption to interact with or adsorb the active substances within the filter to purify the air. Chemical filters are constructed using various materials, including activated carbon and catalysts, comprising a core of filtering material, support structure, and casing for protection and connection.

This article introduces the classification method of airborne molecular contaminants (AMC) in cleanrooms based on SEMI standard F21-95, detailing the four categories of gas-phase pollutants and their characteristics. Techniques for controlling odors and gas pollutants include shielding, combustion, ventilation, and removal, with chemical filters removing molecular pollutants through adsorption and absorption principles. Physical adsorption and chemical adsorption are common methods for gas pollutant removal. Selecting appropriate adsorption materials and controlling temperature and humidity are key factors in achieving efficient gas pollutant removal. The activity, size, and surface chemistry of carbon are critical parameters affecting adsorption efficiency. Lastly, three available filtration systems for providing AMC removal are mentioned.