Ecologization of boilers K9, K10, Ostrava

Implementation site: steelworks ArcelorMittal Ostrava, boilers K9 and K10
Implementation term: 2017-2019

 Boiler, type Dry bottom boiler,  two-pass boiler with natural circulation, indirect fuel feeding , and drum milling systems 
 Boiler parameters
  • 200 t/h; 9.6 MPa(a); 525°C
  • Black coal, blast furnace gas, coke-oven gas
 Scope of delivery
  • Technical design of boiler reconstruction
  • Documentation
  • Modification of evaporator (new bends)
  • Combustion system modification (new OFA tiltable nozzles, new  vapor burners, delivery of new parts of air ducts)
  • New monitoring system of combustion stability 
  • Repair of gas management and new high output and stabilization gas burners
  • Modification and delivery of new parts of milling circuit (new cyclone separators, new technology of flue gas recirculation, and modification of fan mills )
  • Modification and optimization of SNCR secondary measures
  • Boiler safety system replacement
  • Disassembly and assembly of technology
  • Commissioning

 Guaranteed emissions

  • NOx < 200 mg/Nm3 
  • COx < 150 mg/Nm3 
 Milestones
  • Start: 8/2017
  • End: 3/2019
 Boiler, type Dry bottom boiler,  two-pass boiler with natural circulation, indirect fuel feeding , and drum milling systems 
 Boiler parameters
  • 200 t/h; 9.6 MPa(a); 525°C
  • Black coal, blast furnace gas, coke-oven gas
 Scope of delivery
  • Technical design of boiler reconstruction
  • Documentation
  • Modification of evaporator (new bends)
  • Combustion system modification (new OFA tiltable nozzles, new  vapor burners, delivery of new parts of air ducts)
  • New monitoring system of combustion stability 
  • Repair of gas management and new high output and stabilization gas burners
  • Modification and delivery of new parts of milling circuit (new cyclone separators, new technology of flue gas recirculation, and modification of fan mills )
  • Modification and optimization of SNCR secondary measures
  • Boiler safety system replacement
  • Disassembly and assembly of technology
  • Commissioning

 Guaranteed emissions

  • NOx < 200 mg/Nm3 
  • COx < 150 mg/Nm3 
 Milestones
  • Start: 8/2017
  • End: 3/2019