High Temperature Filter Bags

Filter Designs has for many years produced high temperature bag filters for filtering high temperature gas from a variety of applications. Some of these include:

• Secondary Aluminium Smelting.
• Glass production.
• Clinical waste incineration.
• Chemical waste incineration.
• Gasification.
• Pyrolysis.
• Coal fired boilers.
• Tallow power generation.
• Syngas Filtration

These filters normally have tubular bags varying in length from 2 – 6 meters and made from high temperature materials such as PTFE on Glass, P84, Nomex and are cleaned by reverse jet pulsing using compress air. They have a maximum temperature limit of around 220°C with short term surges up to 250°C.

The systems need careful design and often incorporate equipment to remove acid gases, dioxins, furans and heavy metals using dry reagent injection. As required, we offer the removal of oxides of nitrogen (de-NOx) using SNCR and urea solution or prill and our own proven designs.

The filters are designed to ensure efficient operation and protection of the filter system with the supply of spark quenching systems and air bleeds.

Depending on the application, the systems can be with or without offline cleaning and on-line maintenance. Our systems generally have inverter-driven fan units and hence flow and pressure control to maintain a constant negative pressure at the outlet of the process.