Baghouse Manufacturer's Guide: Material Selection, Production Process, Solutions, and Dust Collection

Author: Michael Klepik, Chief Executive Officer

The production of baghouses is tailored to customer requirements. Filter bags are designed considering the technological peculiarities and capacity of the equipment used for filtration.

Factors such as the dustiness of the premises or working area and the throughput are taken into account during the development. In other words, the volume of air or gas-air mass entering per unit of time. These factors significantly influence the selection of technical solutions, materials, and constructions.

Upon the initial customer inquiry, manufacturers propose baghouse solutions, suggesting the most suitable series of filtering devices based on previous implementation experiences in various enterprises.

The typical customer survey process involves clarifying the type of enterprise and equipment, dust levels, airflow intensity, and ambient temperature. Engineers base their recommendations on technological facilities with similar emission types. They also study the technical specifications if the client has specific requirements for purification devices.

In cases where dust levels exceed 50 g/m³, bags with a round cross-section are typically employed. In such instances, high airflow intensity is required. Support rings are utilized to maintain a round cross-section with the maximum filtering channel area.

However, more commonly, flat vertical bags are used. They ensure a uniform delivery of purified gases at low velocity, reducing bag wear. Additionally, the dirty air is evenly distributed along the entire length of the material. According to the principles of gas dynamics, this advantageous distinction makes flat bags more efficient compared to their round counterparts.

Round models are usually more cost-effective than flat ones.

A flat aspiration bag is highly effective at low airflow intensity and occupies less space. Compactness is beneficial in limited workspaces or when the installation needs to be transported between different sites.

The selection of materials at the baghouse factory is made with consideration for the temperature and chemical aggressiveness of the environment. Fiberglass exhibits maximum resistance to aggressive environments and can withstand high temperatures. For lower temperatures and a neutral environment, synthetic fabric made from relatively inexpensive polymers is used.

Our company adheres to this process and conducts quality checks at each stage.

Baghouse filter working principles can be distinguished based on the cleaning method as follows:
• Vibrational shaking;
• Pulse jet cleaning;
• Reverse air cleaning;
• Manual shaking.
We specialize in baghouse supply, providing filters with various cleaning systems. Our engineers will select the optimal solution for your situation.

Methods involving air cleaning consistently demonstrate superior results. Simple shaking, whether done manually or with the assistance of an electric drive, does not always effectively remove dust particles lodged between the fibers. During pulse jet cleaning, the pores temporarily expand, allowing the trapped dust to be expelled under high pressure.

The air cleaning or shaking process is easily automated. The cleaning system can be activated at predefined intervals through a programmer or based on sensor readings. Automatic cleaning is triggered when the pressure exceeds permissible levels or, conversely, falls below acceptable values. In the event that pressure fails to normalize after several attempts, various responses to the emergency situation are possible, ranging from alerting the operator to a complete shutdown of the filtration system.

Materials, including fabrics, metals, sealants, and baghouse engineering, are specifically selected for the project. All fasteners, gaskets, and electrical components are chosen to be suitable for the specified operating conditions. This ensures that the finished products are not excessively prone to corrosion in specific areas and can operate in potentially explosive and fire-hazardous environments. Steel elements are painted to protect against corrosion.

Laser cutting, surface treatment, and metal bending on CNC machines are performed within our production complex. Housing components are welded strictly according to the engineer's design, with weld seam control, ensuring maximum strength of the housing. Additional reinforcement is possible under significant pressure generated by the fan.

The electrical assembly is configured based on the chosen control algorithm. It is possible to assemble a control box with integration into the customer's unified control system. Alternatively, a scheme of local (autonomous) control with simple operating algorithms can be implemented.

After verifying the efficiency of the bag filter following assembly, some major components are disassembled for loading onto a freight vehicle. Then, on-site, the disassembled installation can be easily reassembled through large-node assembly. Assemblies are designed considering the dimensions of vehicles when traveling on public roads.

Baghouse supplier Torch-Air offers high-quality devices tailored to the individual needs of your enterprise. Feel free to reach out; we are here to assist you!

The technology of dust collection and discharge from collectors holds significant importance. For large amounts of collected dust, bunker devices such as rotary valves and "double flap" mechanisms are utilized. In cases of low dust quantities, standard configurations with manual dampers are sufficient. Discharge can occur into reusable or single-use bags (big bags), boxes, or directly into waste transport vehicles. The height of the discharge opening depends on the waste collection method.

Exploring baghouse basics is essential for anyone involved in the design, operation, or maintenance of industrial air filtration systems.