The design of the fan will determine its functionality in a system. Industrial centrifugal fans work with both positive air pressure designs and negative air pressure designs. Pressurizing of air is a common requirement for many application processes in industries like iron & steel, cement, Food & glass, pharmaceutical and chemical etc. In positive air pressure designs, fans are pre situated to the machinery so that positive pressure can be created and air is moved into the system. Positive air pressure fans are generally used in combustion processes, drying and conveying of materials in industries. Negative air pressure designs require air or gas to be vented off from the system. A negative air pressure is created to draw the air off the system. The placement of the fan in such system designs is generally at the end of the machinery. Negative air pressure fans are typically used to exhaust waste and hazardous gases and remove excessive heat from a system. There is also an alternative design where fans are placed amidst a system like in wood industry where pellets, wood chips and saw dust are conveyed directly though the fan in the needed direction. Based on the air movement requirement, pressure design and availability of space at the facility, fans have to be installed at the proper location. Proper placement of a fan system will provide valuable benefits to any industrial setting.
Various Ways to Use Centrifugal Fans in Industries
Industrial fans are generally enormous in size than their regular counterparts and can range up to the power capacity of 15,000 KW. These fans are mostly of centrifugal type having a capability for air movement in radial direction. Industrial centrifugal fans are categorized based on their pressure generation capacity, blade configuration and drive type. The size and the number of blades will determine their airflow handling capability in a system.
Industrial centrifugal fans are in great demand in many industries for process relief and ventilation because of their ability to operate in high or low temperatures, corrosive gases, acidic fumes etc. There are several ways how a centrifugal fan can be functional in industries.
Adopting a good ventilation system using industrial centrifugal fans prevent adverse environment being created inside the industry. Hazardous materials that get released during industrial procedures may cause respiratory ailments and other health issues to the people working there. Installing industrial fans remove dust, heat and fume extractions and provide fresh air flow into the location.
To save the usage of heat energy, industries like cement, chemical, and iron & steel reuse the hot air released during their application processes. Hot air is re-circulated and returned to the process or used in other industrial applications instead of bringing their temperatures down and releasing into the open atmosphere. Air circulation fans are popular in circulating hot air, fumes exhausting or cooling / controlling the temperatures of indoor industrial atmosphere.
Industrial processes require variety of materials to be handled through different operational procedures. Industrial centrifugal fans help moving the materials through the air stream and conveying it to the destination point. However, for conveying of the bulk or high density materials, heavy duty fans with higher air velocity are to be installed. Material handling fans are common in pharmaceutical, food processing and wood industries.
Dust / Fume Extraction
Smoke, dust, fumes and waste gases cause major pollution to any industrial setting. Inhaling them can cause serious implications on the health of industrial workers. Sometimes, flammable materials or fumes get released into the air due to chemical mixes reacting in the industrial processes. If not properly handled, they can become risky and can cause direct injuries to the employees. Hence, it is important to install highly efficient fans to remove such harmful pollutants and create safe working environment.
Drying process controls the temperature and moisture content of the materials. There are several industrial applications that require heat treatment or desiccation process. Centrifugal fans for drying are prominently used in food production, pharmaceutical and cement industries. In food processing industry, centrifugal dryer fans dry and exhaust the moisture content from the food material. In cement industry they dry the clinker in the kilns whereas in pharma industries, the fans dry the drugs before they are sent for packing.
In industries cooling fans are generally used to control or reduce the heat. Backward curved & inclined high pressure centrifugal fans are commonly used in cooling systems to regulate high temperatures of any industrial process. Heavy duty cooling fans have high demand in glass, power plants, paper and cement industries.