Factory Common Filter Cage to support filter bag in dust collector baghouses

Filter bag cages are typically constructed from various materials, depending on the specific application and environmental conditions. Common materials used for filter bag cages include:

Filter cages, used in dust collection systems and baghouses, can undergo various surface treatments to enhance their durability, corrosion resistance, and performance. The choice of surface treatment depends on the material of the cage and the specific requirements of the application. Here are some common surface treatments for filter cages:

The installation of filter cages and bags is the most delicate and meticulous part of the entire installation process. Therefore, it should be done during the final installation phase. When installing bags, it's essential to be cautious and avoid any contact between the bags and sharp objects, as even minor scratches can significantly reduce the lifespan of the bags. The correct method for bag installation involves placing the bags through the housing plate holes, then compressing the upper springs into a concave shape and fitting them into the holes in the housing plate. The spring rings should be allowed to recover their original shape. Finally, gently insert the bag cage into the bag mouth, ensuring that the top cover of the cage is firmly pressed against the housing plate hole.

Filter Bag Cage: The vertical ribs of the frame should be parallel to each other with a certain spacing. The frame should have 20 vertical ribs, or the spacing between vertical ribs should be ≤ 19.05mm.
Horizontal ring spacing should not exceed 150mm.
The distance between the first horizontal ring and the top of the frame should not exceed 80mm, and the distance between the last ring and the bottom of the frame should not exceed 80mm.
The diameter of the entire frame from the last horizontal ring to the top of the frame should remain consistent, with a diameter tolerance of -0.8mm to 0.
Horizontal support rings must be perpendicular to the vertical ribs, with a deviation allowed between -1° to +1°.
The frame length tolerance is -6mm to 0.
The frame deflection should be within a range of 1.5mm for every 305mm change in length.
The top structure of the frame should meet the specific specifications of the customer's dust collector.
The frame base must be sturdy, welded or folded onto the vertical ribs. The frame base must be equal to or slightly smaller than the frame's outer diameter.
The vertical ribs should be continuous and smooth without any weld points on the outside.

All frames must be free from burrs and have solid weld points.
The cage material is 20# cold-drawn carbon steel, produced using a single-forming cage production line to ensure the straightness and torsion of the cage. After spot welding the filter bag frame, it should be smooth, free from burrs, and possess sufficient strength to prevent detachment, loose welding, and welding leaks.
The bag cage adopts a surface zinc electroplating corrosion prevention technique, providing a durable, wear-resistant, and corrosion-resistant coating. This prevents rusting on the surface of the cage and bonding with the filter bag after the dust collector has been in operation for some time, ensuring smooth bag replacement and reducing damage to the filter bags during the replacement process."

"The cage material is made of high-quality high-carbon wire, and an automated cage production line is used for one-time forming, ensuring the straightness and torsion resistance of the cage. After spot welding the filter bag frame, it is smooth and free from burrs, with sufficient strength, and no issues of detachment, loose welding, or welding leaks. The bag cage is coated using silicone technology, providing a durable, wear-resistant, and corrosion-resistant coating. This prevents rusting on the surface of the cage and bonding with the filter bag after the dust collector has been in operation for some time, ensuring smooth bag replacement and reducing damage to the filter bags during the replacement process."

What is the Pulse-jet Baghouse Filter Bag Replacement Standards:
The filter bags in a pulse-jet baghouse dust collector are essential components. Over time, these bags may experience reduced air permeability or damage, requiring replacement. The gradual wear and tear on the filter bags can be caused by the abrasive forces of dust, high temperatures leading to filter material degradation, and chemical corrosion. When the abrasive forces of dust are strong, the bottom of the bag experiences the most wear. An increase in system capacity that raises the filtration velocity can also accelerate wear.

Damaged filter bags should not be used in the dust collector as it can expedite the failure of the collector. In cases of minor, localized damage to individual bags, old bags or new bags of the same material can be used to patch the holes. Patching can be done using organic silicone rubber adhesive, provided the adhesive's temperature and chemical properties are compatible with the operating conditions.

When the majority of filter bags are damaged, a complete replacement should be performed. This is also necessary when the filter media accumulates fine dust over extended use, reducing its air permeability and affecting system airflow. It's best to replace filter bags when the dust collector is not in operation.

If filter bag replacement is required while the dust collector is still operational, isolation of individual compartments is necessary. Isolated compartments should have the lift valve in the closed position, and the pulse valve should not be in operation. During the removal or installation of filter bags, caution should be exercised to prevent bags from falling into the hopper due to negative pressure at the bag's mouth.