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FGD-Limestone Grinding Plants General Technical Training MJ / 23.02.2009 1.

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Presentation on theme: "FGD-Limestone Grinding Plants General Technical Training MJ / 23.02.2009 1."— Presentation transcript:

1 FGD-Limestone Grinding Plants General Technical Training MJ /

2 FGD-Limestone Grinding Plants General Technical Training MJ / General Technical Training for CEMTEC FGD-Limestone Grinding Plants and Equipments thereof 2 CEMTEC Cement and Mining Technology GmbH Ennshafenstrasse Enns, Austria T: F: E:

3 FGD-Limestone Grinding Plants General Technical Training MJ / The FGD-limestone grinding plants are installed in coal fired power plants to prepare the „ready-for-use“ limestone-water-suspension. Pre-crushed limestone is milled in a closed wet grinding circuit and afterwards used to react with the flue gas to gypsum in the FGD-towers. FlueGasDesulfurization-Process pre crushed limestone limestone grinding FGD-process gypsum dewatering

4 FGD-Limestone Grinding Plants General Technical Training MJ /

5 FGD-Limestone Grinding Plants General Technical Training MJ / Typical General Layout (including control room layout)

6 FGD-Limestone Grinding Plants General Technical Training MJ / Turn-Key Plant Layout (including Control room)

7 FGD-Limestone Grinding Plants General Technical Training MJ / Main Equipments deliverable by CEMTEC -limestone transport and daily storage area including pre-crushing (if necessary) -limestone dosing belts -wet grinding mills including lubrication systems -process water dosing by means of regulation valves -limestone slurry tank (circulation tank after mill) including agitator -slurry pump including additional stand-by pump (on demand) -hydrocyclone clusters including stand-by cyclones (1 spare or more according demand) -limestone slurry piping system including valves and distribution into limestone slurry storage tank (according detailed take over point requirements) -process water piping according detailed take over point requirements -instrumentation -auxiliary media piping such as instrument air, purging water, cooling water etc. -electrical equipment and control system (MCC, FCC, PLC according detailed project specification)

8 FGD-Limestone Grinding Plants General Technical Training MJ / Auxiliary Equipments deliverable by CEMTEC (on demand) -secondary structures as piping supports, maintenance platforms and walkways -sound deadening covers for ball mills -grinding media filling devices -grinding media sorting machine -maintenance handling systems (e.g. monorail crane)

9 FGD-Limestone Grinding Plants General Technical Training MJ / Flow-sheet

10 FGD-Limestone Grinding Plants General Technical Training MJ / CEMTEC-turn-key plant

11 FGD-Limestone Grinding Plants General Technical Training MJ /

12 FGD-Limestone Grinding Plants General Technical Training MJ /

13 FGD-Limestone Grinding Plants General Technical Training MJ / feeding materialpre-crushed limestone (recommended maximum grain size 20 mm) - final productlimestone slurry (normal fineness P90 = 44 μm) - process water - purging water - compressed air/service air - compressed air/instrument air General Data / Utilities

14 FGD-Limestone Grinding Plants General Technical Training MJ / Daily storage silo and material feed

15 FGD-Limestone Grinding Plants General Technical Training MJ / Daily storage silo and material feed

16 FGD-Limestone Grinding Plants General Technical Training MJ / Grinding mill including auxiliaries thereof

17 FGD-Limestone Grinding Plants General Technical Training MJ / Grinding mill including auxiliaries thereof

18 FGD-Limestone Grinding Plants General Technical Training MJ / Wet grinding mill section (lining not shown)

19 FGD-Limestone Grinding Plants General Technical Training MJ / Grinding mill inlet

20 FGD-Limestone Grinding Plants General Technical Training MJ / Grinding mill inlet detailDilution water mill inlet

21 FGD-Limestone Grinding Plants General Technical Training MJ / Grinding mill discharge

22 FGD-Limestone Grinding Plants General Technical Training MJ / Grinding mill discharge detail Dilution water mill discharge

23 FGD-Limestone Grinding Plants General Technical Training MJ / Circulation tank and slurry pumps

24 FGD-Limestone Grinding Plants General Technical Training MJ / Slurry circulation tank with agitator

25 FGD-Limestone Grinding Plants General Technical Training MJ / Circulation tank and slurry pumps

26 FGD-Limestone Grinding Plants General Technical Training MJ / Hydrocyclones and density measurement

27 FGD-Limestone Grinding Plants General Technical Training MJ / Hydrocyclone clusters

28 FGD-Limestone Grinding Plants General Technical Training MJ / Slurry diverter valve

29 FGD-Limestone Grinding Plants General Technical Training MJ / Density measurement

30 FGD-Limestone Grinding Plants General Technical Training MJ / Limestone slurry (product) tank

31 FGD-Limestone Grinding Plants General Technical Training MJ / Valves and piping

32 FGD-Limestone Grinding Plants General Technical Training MJ / limestone slurry piping

33 FGD-Limestone Grinding Plants General Technical Training MJ / process water piping

34 FGD-Limestone Grinding Plants General Technical Training MJ / purging water piping

35 FGD-Limestone Grinding Plants General Technical Training MJ / Starting with cut of valves at take over point(s)

36 FGD-Limestone Grinding Plants General Technical Training MJ / flow control valves for dilution water process piping for limestone slurry

37 FGD-Limestone Grinding Plants General Technical Training MJ / including limit switches for end positionse.g. pneumatic actuated valves

38 FGD-Limestone Grinding Plants General Technical Training MJ / instrumentation local control boxes and local indication

39 FGD-Limestone Grinding Plants General Technical Training MJ / Auxiliary media piping instrument air for pneumatic actuators purging water piping

40 FGD-Limestone Grinding Plants General Technical Training MJ / Control system

41 FGD-Limestone Grinding Plants General Technical Training MJ / NoAutomatic Sequences including Subsequences 01Grinding circuit production sequence 02Grinding circuit standby sequence 03Central lubrication sequence 04Gear rim lubrication sequence 05Main/standby pump changeover sequence 06Mill antisedimentation sequence 07Mill main drive sequence 08Slurry pump circuit purging sequence 09Mill purging sequence 10Hydrocyclones and mill purging sequence 11Hydrocyclones purging sequence 12Tank emptying sequence 13Knife gates purging sequence 14Mill inlet purging sequence 15Mill discharge coarse overflow purging sequence 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”);

42 FGD-Limestone Grinding Plants General Technical Training MJ / HMI - Plant overview

43 FGD-Limestone Grinding Plants General Technical Training MJ / HMI – Grinding circuit overview

44 FGD-Limestone Grinding Plants General Technical Training MJ /

45 FGD-Limestone Grinding Plants General Technical Training MJ / HMI – Grinding mill overview

46 FGD-Limestone Grinding Plants General Technical Training MJ / HMI – Pump and hydrocyclone overview

47 FGD-Limestone Grinding Plants General Technical Training MJ / HMI – Settings (password protected)

48 FGD-Limestone Grinding Plants General Technical Training MJ / Auxiliary Equipments maintenance platforms and walkways

49 FGD-Limestone Grinding Plants General Technical Training MJ / sound deadening covers for ball mills

50 FGD-Limestone Grinding Plants General Technical Training MJ / grinding media filling/refilling devices

51 FGD-Limestone Grinding Plants General Technical Training MJ / grinding media sorting machine

52 FGD-Limestone Grinding Plants General Technical Training MJ / Thank you!


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