Protection of Burners and Combustion Equipment

Download PDF

Problems

Fuel gas in a refinery or a gas plant is a mixture of off-gases from processes in the plant. Since these processes are vulnerable to upset conditions, the compostion of the fuel gas is frequently changing. Fuel gas can contain high concentrations of condesable hydrocarbons and carried over amine. These liquids are in fine aerosol form and very difficult to seperate eith knock-out drums or paacked vessels. As liquids and solids enter combustion equipment, they foul burner nozzles and combustors. This results in frequent maintanance and replacement of the burners, poor burner efficiency and increased fuel gas consumption. Plugged nozzles can change the flame pattern in the combustion equipment resulting in catastrophic damage. Burners should operate for up to a year before seeing any signs of nzzle plugging. If plugging and regular maintenance occurs more frequently, the fuel gas contains too many liquid and solid contaminants which should be removed.

Pall Solution

A Pall SepraSol™ Liquid/Gas caolescer in the fuel gas line will remove virtually all the entrained liquids in the fuel gas. SepraSol coalescers remove hydrocarbons, amine, or caustic aerosols are small as 0.1 micron. Most aerosols smaller than 5 micron are not seperated in knock-out drums or packed vessels.

All of Pall's SepraSol coalescer products contain a patented oeleophobic/hydrophobic treatment which allows the coalescer to recover quickly and capture more efficiently slugs of liquid that result from the upset conditions that frequently occur in fuel gas systems. These treated coalescers are particularly beneficial in fuel gas systems which are operating in petroleum refineries and gas processing plant.

Figure 1: Process Heater/Furnace

Filter Locations Recommended Pall Assembly Purpose of Separation Benefits of Separation
1 Pall SepraSol Liquid/Gas Coalescer
CS604LGH13
CC3LGO2H13 CC3LGA7H13 CC3LGB7H13– for amine
Remove condensable hydrocarbon, amine, or caustic from fuel gas
  • Longer service life of burners
  • Improved combustor or furnace efficiency and operations
  • Improved reliability
  • Lower maintenance cost

Other Applications

Natural gas turbines- combustor protection protection of gas fired boilers.

References

  • GAS 4102 - SepraSol Liquid/Gas Caolescer
  • GASS 4014 - SepraSol Liquid/Gas Coalescer-(Double Open Ended Style)
  • H52 - Seprations Technologies in Petroleum Refining
  • GAS-4501 - Operations and Instillation Guide to SepraSol Coalescer Assemblies