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General Technical Training for CEMTEC FGD-Limestone Grinding Plants and Equipments thereof

General Technical Training for CEMTEC FGD-Limestone Grinding Plants and Equipments thereof. CEMTEC Cement and Mining Technology GmbH Ennshafenstrasse 40 4470 Enns, Austria T: +43 7223 83620 0 F: +43 7223 83620 333 E: info@cemtec.at. F lue G as D esulfurization -Process.

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General Technical Training for CEMTEC FGD-Limestone Grinding Plants and Equipments thereof

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  1. General Technical TrainingforCEMTECFGD-Limestone GrindingPlantsandEquipments thereof CEMTEC Cementand Mining Technology GmbHEnnshafenstrasse 404470 Enns, Austria T: +43 7223 83620 0 F: +43 7223 83620 333 E: info@cemtec.at

  2. FlueGasDesulfurization-Process The FGD-limestone grindingplantsareinstalled in coalfired power plantstopreparethe „ready-for-use“ limestone-water-suspension. Pre-crushed limestone ismilled in a closedwetgrindingcircuitandafterwardsusedtoreactwiththeflue gas togypsum in the FGD-towers. gypsum dewatering precrushedlimestone limestone grinding FGD-process

  3. TypicalGeneral Layout (includingcontrolroom layout)

  4. Turn-Key Plant Layout (including Controlroom)

  5. MainEquipmentsdeliverableby CEMTEC -limestonetransport and dailystorage area includingpre-crushing (ifnecessary) -limestonedosingbelts -wetgrindingmillsincludinglubricationsystems -process water dosingbymeansofregulationvalves -limestoneslurry tank (circulation tank aftermill) includingagitator -slurrypumpincludingadditional stand-by pump (on demand) -hydrocycloneclustersincluding stand-by cyclones (1 spare or more accordingdemand) -limestoneslurrypiping system includingvalves and distributionintolimestoneslurrystorage tank (accordingdetailed take overpointrequirements) -process water pipingaccordingdetailed take overpointrequirements -instrumentation -auxiliary media pipingsuchasinstrument air, purging water, cooling water etc. -electricalequipment and control system (MCC, FCC, PLC accordingdetailed project specification)

  6. AuxiliaryEquipmentsdeliverableby CEMTEC (on demand) -secondarystructuresaspipingsupports, maintenanceplatforms and walkways -sound deadeningcoversfor ball mills -grinding media fillingdevices -grinding media sortingmachine -maintenancehandlingsystems (e.g. monorailcrane)

  7. Flow-sheet

  8. CEMTEC-turn-keyplant

  9. General Data / Utilities • feeding material pre-crushedlimestone (recommendedmaximumgrainsize 20 mm) • finalproductlimestoneslurry (normalfineness P90 = 44 μm) • process water • purging water • compressed air/service air • compressed air/instrument air

  10. Dailystorage silo and material feed

  11. Dailystorage silo and material feed

  12. Grindingmillincludingauxiliariesthereof

  13. Grindingmillincludingauxiliariesthereof

  14. Wetgrindingmillsection (liningnotshown)

  15. Grindingmillinlet

  16. Grindingmillinletdetail Dilution water millinlet

  17. Grindingmilldischarge

  18. Dilution water milldischarge Grindingmilldischargedetail

  19. Circulation tank and slurrypumps

  20. Slurrycirculation tank with agitator

  21. Circulation tank and slurrypumps

  22. Hydrocyclones and density measurement

  23. Hydrocycloneclusters

  24. Slurrydiverter valve

  25. Density measurement

  26. Limestoneslurry (product) tank

  27. Valves and piping

  28. limestoneslurrypiping

  29. process water piping

  30. purging water piping

  31. Startingwith cut ofvalves at take overpoint(s)

  32. flow controlvalvesfordilution water processpipingforlimestoneslurry

  33. e.g. pneumaticactuatedvalves includinglimitswitchesfor end positions

  34. instrumentation localcontrolboxes and localindication

  35. Auxiliary media piping purging water piping instrument air forpneumaticactuators

  36. Control system

  37. Operating modes • The operating modes managed by the PLC are the following : • Maintenance (with local selector on “LOCAL”); • manual (with local selectors on “REMOTE”); • Automatic (with local selectors on “REMOTE”); No Automatic Sequences including Subsequences 01 Grinding circuit production sequence 02 Grinding circuit standby sequence 03 Central lubrication sequence 04 Gear rim lubrication sequence 05 Main/standby pump changeover sequence 06 Mill antisedimentation sequence 07 Mill main drive sequence 08 Slurry pump circuit purging sequence 09 Mill purging sequence 10 Hydrocyclones and mill purging sequence 11 Hydrocyclones purging sequence 12 Tank emptying sequence 13 Knife gates purging sequence 14 Mill inlet purging sequence 15 Mill discharge coarse overflow purging sequence

  38. HMI - Plantoverview

  39. HMI – Grindingcircuitoverview

  40. HMI – Grindingmilloverview

  41. HMI – Pump and hydrocycloneoverview

  42. HMI – Settings (password protected)

  43. AuxiliaryEquipments maintenanceplatforms and walkways

  44. sound deadeningcoversfor ball mills

  45. grinding media filling/refillingdevices

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