Flanged filter bag is an advanced industrial dry filtration system that completely drains and refines heavy production lines by using tight and rigid flanged connections between the hopper, bag chamber and clean air plenum. The use of bolt and nut flange connections with heat-resistant gaskets reduces the leakage of contaminated air to the salon environment and the entry of false air into the suction system to zero and maintains the dust removal efficiency above 99%. The efficiency of this equipment depends on the accurate calculation of the ratio of air to fabric, the strength of the structure and the control of gas flow turbulence at the entrance of the bag house.
The challenge of pressure drop and leakage in industrial dust collector lines
In the technical monitoring of the production lines of steelmaking, cement and chemical industries, we have encountered a decrease in the suction power of the fans many times after a few months have passed. The root of this drop in efficiency is not the weakness of the filter bags in most cases; Rather, it is the infiltration of false air from the non-standard seams of the body and the change in the form of weak connections due to continuous suction.
When the connection of different parts of the bag house is done without engineering flanges and only by patch welding in the factory, the constant vibrations of the fan and thermal stresses cause hairline cracks in the welding lines. These tiny holes waste the air flow of the fan and take away the necessary power from the main suction point on the production line. The engineering solution to completely eliminate this energy loss is the modularization of the device with reinforced flange frames.
Structural advantages of flanged filter bag in harsh working conditions
Using flange sections with precise machining changes the static and dynamic behavior of the bag house. This mechanism creates significant differences with traditional models:
Stabilization of structural rigidity against dynamic pressures
Centrifugal fans create high negative pressure up to several thousand pascals in the body of the filtration chamber. Peripheral flanges actually act like stiffener belts and prevent the phenomenon of bellying and bending of the body sheets. This feature increases the useful life of the filtration chamber up to two times compared to normal shells.
Quick assembly and reduction of production line stops (Overhaul)
One of the problems of factory managers is the time-consuming process of overhauling and replacing worn parts. Flanged connections allow the plenum section, filter body and hopper funnel to be separated from each other without the need for cutting and grinding with flame. This ease of disassembly minimizes line downtime during annual maintenance.
The ability to install all kinds of industrial gaskets according to the fluid
Production lines with corrosive dust, acid or hot particles with a temperature exceeding 150 degrees Celsius require special insulation. In the flanged design, according to the type of gas input, fireproof silicone gaskets, Klingrite or PTFE are installed so that the seal does not break in the long run.
Welding standards and guaranteeing the health of the bag house body
Field experience has shown that the weak point of filtration structures in the face of vibration loads is porous and non-penetrating welds. The construction of a reliable industrial bag filter requires the implementation of strict metallurgical guidelines:
- Intrusion welding with shielding gas (MIG/MAG): All internal seams of hoppers and sheet bags must be welded with full penetration to prevent the accumulation of micron dust particles in dead spaces and early corrosion of the metal.
- Non-destructive testing (NDT): Health monitoring of weld lines in sensitive and under tension joints is done with liquid penetrant tests (PT) to prevent the smallest discontinuity. Remove from painting.
- Painting with zinc-rich epoxy coating: For wet or acidic industrial environments, multi-layer epoxy polyamide coating on sandblasted surfaces makes full carbon steel sheets completely safe from corrosive gases.
Exclusive manufacturing order in Poya Sanat Isfahan with quality commitment
The use of each production line is unique; From the volume of contaminated air (CFM) to the nature, density and stickiness of dust particles. The design of bag filters made in Poya Sanat Isfahan is based on specialized fluid mechanics calculations and finite element stress analysis.
Poya Sanat Isfahan Engineering Group offers all flanged dust collection systems with a written guarantee of welding quality and a guarantee of body strength. This guarantee includes the complete resistance of the sheets to the defined negative pressures, no false air leakage from the flanges, and no falling of welding lines under the vibrations of the pulse jet cleaning system, in order to solve the concern of technical managers in the field of industrial environmental sustainability.