Bag Filter

"Fourteckh Enviro (India) Private Limited" is recognized in the industry as the Manufacturer, Supplier & Exporter of Bag Filters which are designed to handle heavy dust loads.

We provide a large selection of bag filters. A dust collector system is made to manage large amounts of dust and includes a blower, a dust filter, a filter-cleaning system, and a dust receptacle or dust removal system. It differs from air purifiers that remove dust using disposable filters. The air filled with dust enters the Bag Filter. Within the bag air filter chamber, the dust and powder separate. While the powder is being separated, the air is evenly distributed to prevent channeling. The bags first develop a layer of substance. The coat then serves as the filtration medium. As air moves from the outside to the inside of the filter bags, dust builds up on the filter elements. Reverse pulse jet air periodically removes the accumulated powder from the bags. Powder discharge valves release the loosened powder once it lands on the bottom cone. An induced draft fan draws in the dust-free air, which is then released into the atmosphere.

Bag Filter:

A Bag Filter, also known as a Fabric Filter or Baghouse, is an air pollution control device used to capture dust and particulates from industrial exhaust gases. It is widely used in industries where fine dust particles must be removed efficiently to keep emissions within regulatory limits.

Working Principle of a Bag Filter:

A Bag Filter (also called a Fabric Filter or Baghouse) removes dust particles from an air or gas stream using fabric filter bags. It works on the principle of filtration, where dust-laden air passes through filter media, and dust gets trapped on the bag surface.

Dusty air or gas enters the bag filter through an inlet duct. Large particles settle due to gravity. Finer particles move toward the filter bags. The air passes from outside to inside of the filter bags (or reverse, depending on design). Dust particles get trapped on the outer surface of the filter bags. Clean air passes through the fabric and exits via the clean air outlet. This creates a dust cake on the bag surface, which actually improves filtration efficiency. As dust accumulates, airflow resistance (pressure drop) increases. Once it reaches a set limit, the cleaning mechanism activates.

Different cleaning methods are used to remove dust cake:

• Pulse Jet Cleaning (most common) .. A short burst of compressed air is injected into each bag → bag expands → dust cake dislodges.
• Reverse Air Cleaning.. Low-pressure reverse airflow collapses bags → dust loosens.
• Shaker Cleaning .. Mechanical shaking of bags removes dust.

Dislodged dust falls into the hopper at the bottom of the bag filter. Dust is removed through a rotary airlock, screw conveyor, or manual valve. After filtration, clean air exits the outlet and is released into the atmosphere or returned to the system.

Bag Filter works by trapping dust on fabric bags, cleaning the bags periodically, and discharging collected dust all while delivering clean air continually.

Key Features of a Bag Filter:

High Filtration Efficiency removes fine dust particles up to 1–5 microns and ensures clean and dust-free air/gas output.

Filter bags can hold a significant amount of dust before needing cleaning which increases operational time between maintenance cycles. They are effective even in environments with heavy particulate concentrations.

Filter bags can operate 24/7 depending on pulse cleaning system. Cleaning mechanisms include Pulse Jet, Mechanical Shaker, Reverse Air. It can meet strict pollution control norms and ensures outlet emissions within regulatory limits. It has low pressure drop across filters and reduced power consumption for induced draft or blower fans. Filter Bags are easy to inspect, replace, and clean and have modular design which simplifies the servicing.

Filter Bags are made from metal shells and robust support cages and can handle harsh industrial conditions. These Bags are available in polyester, polypropylene, Nomex, PTFE, etc. They are chosen based on temperature, chemical nature, and dust load.

Types of Bag Filters:

• • Pulse Jet Bag Filter (Pulse Jet Dust Collector) - Uses compressed air pulses to clean the bags. Allows continuous operation without shutdown. Suitable for fine and dry dust.
• • Reverse Air Bag Filter - Uses low-pressure reverse airflow to clean the bags. Gentle cleaning method → increases bag life. Suitable for large air volumes and high-temperature applications.
• • Shaker Bag Filter - Uses mechanical shaking to clean dust from bags. Requires system shutdown during cleaning. Typically used for light to moderate dust loads.
• • Cyclone + Bag Filter Combination - Uses a cyclone separator as a pre-cleaner. Reduces dust load on the bag filter. Extends filter bag life in heavy dust environments.
• • Pleated Bag Filter - Bags are replaced with pleated cartridges. Increases filtration surface area. Suitable for compact dust collectors and retrofit upgrades.
• • High-Temperature Bag Filters - Made from specialty fabrics (e.g., fiberglass, PTFE, P84, Nomex). Used in boilers, furnaces, power plants, and incinerators.
• • Anti-Static Bag Filters - Designed with conductive fibers. Prevent static charge buildup. Ideal for combustible dust (pharma, food, chemicals).

Bag Filters application industries

Common application industries where Bag Filters (Fabric Filters) are widely used:

Cement & Construction Materials, Steel & Metallurgical Industry, Power Plants, Pharmaceuticals, Food & Beverage Industry, Chemical & Petrochemical Industry, Mining & Minerals, Textile Industry, Agriculture & Agro-Processing, Waste Incineration Plants, Woodworking & Furniture Industry.