Flame retardant for filter systems and method for improving flame resistance in filter systems

A method for improving the flame resistance in filter systems in which an air flow charged with flammable aerosols previously generated by a process is fed to a filter, wherein the filter retains the flammable aerosols from the air flow at least in a substantial proportion, said method comprising:

• receiving, from a process, an air flow charged with flammable aerosols previously generated by said process;
• introducing and distributing a granular flame retardant material into the air flow charged with flammable aerosols after said flammable aerosols are generated by said process and received into said air flow and prior to said air flow charged with flammable aerosols being fed to the filter, said granular flame retardant material consisting of non-flammable porous mineral granules including large surface area for interacting and binding with a large quantity of said flammable aerosols in said air flow, wherein said non-flammable porous mineral. granules introduced and distributed into said airflow interacts and binds with said flammable aerosols while still in said air flow, for reducing the reactive surface area of said flammable aerosols;
• and
• providing a filter, disposed in said air flow charged with flammable aerosols and said granular flame retardant material, said filter configured for retaining the combination of said granular flame retardant material and interacted flammable aerosols introduced and distributed into said air flow.