Evacuation Float System for Bag Filters

Bag filter systems play a crucial role in liquid filtration across various industries. However, a common challenge associated with bag filters is the risk of overflow and product loss, particularly when filter media becomes blocked or clogged. This situation, often referred to as “blinding,” can lead to complications such as liquid spillage and increased bag weight when the vessel lid is opened. Fortunately, modern technological innovations, such as our evacuation float systems, offer an effective solution to these issues. In this article, we will explore the workings of the evacuation float system, its benefits, and its potential impact on industrial filtration operations.

Understanding the Challenges of Bag Filter Systems

Bag filters are widely used in industrial processes to filter large volumes of liquid. They are especially effective for removing contaminants from liquids, ensuring the desired purity level. However, one of the primary challenges in a bag filter housing is the potential for overflow and product loss when the filter becomes clogged. As filter media becomes blocked, the pressure inside the filter housing increases, leading to a situation where the liquid level rises to the top of the filter bag. When operators open the filter vessel to replace the bag, the liquid is prone to spilling over, resulting in product loss and additional cleaning requirements.

Moreover, the weight of the bag can significantly increase due to the liquid retained inside, making the replacement process more labour-intensive and time-consuming.

The Evacuation Float System: A Game-Changer

The evacuation float system is an innovative solution that addresses these common challenges in bag filter systems. Designed to displace liquid efficiently, the evacuation float system prevents overflow and reduces product loss by rising to the surface of the liquid when the filter cover is opened. This float displaces a significant amount of liquid, thereby minimizing the risk of spillage and making bag removal easier.

Here’s how the evacuation float system works:

  • During normal filtration operation, liquid flows through the filter bag as the media captures contaminants. Over time, as the filter bag becomes clogged, the pores in the media blind, causing the liquid level inside the housing to rise.
  • When the vessel cover is opened for bag replacement, the evacuation float comes into action. The float rises to the top of the liquid, displacing a portion of it and allowing for the easy removal of the filter bag with minimal spillage.

This system is especially beneficial in industrial settings where reducing product loss and minimising downtime are critical to maintaining efficient operations.

Key Features of the Evacuation Float System

The evacuation float system is equipped with several features that enhance its performance and versatility:

  • Product Savings: By displacing liquid effectively, the system helps conserve valuable product that would otherwise be lost due to spillage. This leads to considerable savings over time.
  • Easier and Faster Bag Changes: The system simplifies the bag removal process by reducing the weight of the filter bag, making it lighter and easier to handle. Additionally, fewer spills mean less time spent cleaning up, further speeding up the process.
  • Reduced Bag Breakage: With less strain on the filter bag during removal, there is a lower risk of the bag breaking or tearing, which can lead to further product loss and contamination.
  • Versatility: The evacuation float system is compatible with most standard bag filter housings, making it a flexible solution for a wide range of industrial applications.

Technical Specifications

The evacuation float system is available in different sizes to suit varying bag filter housings. Below are the technical details:

  • Construction: Stainless steel 316L for durability and resistance to corrosion.
  • Finish: Bead blasted for a smooth, polished surface.
  • Sizes: Designed to suit both size 1 (5” diameter x 12” length) and size 2 (5” diameter x 26.5” length) filter bag housings.
  • Weights: Size 1 weighs approximately 1.4 kg, while size 2 weighs around 3.2 kg.
  • Operating Pressure: Capable of handling pressures up to 6 Bar, with higher ratings available upon request.
  • Options: Available in reinforced and coated options (such as Halar) for additional durability.

The versatility of the system extends to its ability to fit most Allied Filter Systems Ltd filter housings as well as other standard bag filter housings, ensuring wide applicability across various industries.

Operational Benefits of the Evacuation Float System

The evacuation float system offers several operational advantages that make it a valuable addition to any liquid filtration process:

  • Minimised Spillage: The system significantly reduces the risk of spillage by displacing liquid inside the filter housing, ensuring cleaner operations and less downtime.
  • Reduced Product Loss: By preventing the loss of liquid during bag changes, the evacuation float system conserves valuable product, contributing to higher overall efficiency.
  • Lighter Filter Bags: The reduced weight of the filter bag during removal makes the process safer and less labour-intensive for operators.
  • Reduced Downtime: The faster and easier bag change process minimizes downtime, allowing for quicker turnaround times and improved productivity.

In terms of environmental impact, the evacuation float system also contributes to sustainability by reducing the amount of waste generated during filtration. The system’s ability to minimize product loss and reduce the frequency of bag changes translates into fewer filter bags being used and disposed of, thereby lowering the carbon footprint of the filtration process.

Conclusion

In summary, the evacuation float system is a highly effective solution for overcoming the common challenges associated with bag filter systems, such as overflow, spillage, and product loss. By incorporating this system into your filtration process, you can achieve greater efficiency, reduce operational costs, and ensure smoother, more reliable operations.

Whether you are dealing with high flow rates, frequent bag changes, or issues related to product loss, the evacuation float system offers a practical and versatile solution. With its ease of use, compatibility with most bag filter housings, and significant operational benefits, it is an ideal choice for industries that rely on liquid filtration.

The Evacuation Float in Action

We recently created a video to demonstrate the evacuation float in action. You can see how well it works in the video below.

Evacuation Float System for Bag Filters: A Comprehensive Solution to Product Loss and Overflow
Scroll to top