EN 12952-9:2002

Foreword
1 Scope
   1.1 Firing systems
   1.2 Fuels
   1.3 Operation
   1.4 Boundary of pulverizing system
2 Normative references
3 Terms and definitions
4 Fuel storage facilities with conveying plant
   4.1 General
   4.2 Conveying plant
   4.3 Coal bunkers
5 Pulverizing system and pulverized fuel system
   5.1 General
   5.2 Coal Feeders
   5.3 Mills
   5.4 Pulverized fuel bins
   5.5 Pulverized fuel supply pipes and shutoff devices
6 Explosion prevention measures for pulverizing systems
   and pulverized fuel systems
   6.1 General
   6.2 Plants operated without inert gas protection
   6.3 Plants operated with inert gas protection
7 Equipment for air supply and flue gas discharge
   7.1 Air supply
   7.2 Air/fuel ratio
   7.3 Flue gas discharge
8 Firing system
   8.1 General
   8.2 Burners for pulverized fuel
   8.3 Flue gas recirculation
   8.4 Modification of the firing system setting
   8.5 Monitoring and control
   8.6 Electrical equipment
   8.7 Safety precautions
9 Ash extraction plant
10 Operation and maintenance
   10.1 General
   10.2 Operating manual and instructions
Annex A (informative) Operational requirements for permanently
          supervised firing system for pulverized fuel
Annex ZA (informative) Clauses of this European Standard
          addressing essential requirements or other provisions
          of the Pressure Equipment Directive
Bibliography

1.1 Firing systems: These requirements apply to pulverized fuel firing systems of steam and hot water generators (boilers) and commence at the filling equipment for the boiler bunkers or for the pulverized fuel storage system and end at the ash extraction plant. For multifuel firing systems using separate or combined burners these requirements shall apply to the pulverized fuel firing part involved. For other fuels or firing systems used in combination other requirements shall apply e.g. prEN 12952-8.