final ppt 2024__________________________________ .pptx

ntpc

1. BY , MANISH MOTGHARE EMP. No.228730 ARTISAN TRAINEE (NTPC MOUDA) Welcom To NTPC Mouda – Chemistry Department 1

2. NTPC Mouda – 2 x 500 MW + 2 x 660 MW = 2320 MW Chemistry Department Activities – Coal Sampling Effluent Treatment Pre-Treatment of Raw Water to produce Clarified Water Filtration of Clarified Water to produce Filtered Water Demineralisation of Filtered Water to produce Demineralised Water Cooling water treatment Coal Analysis/Steam Water Analysis/Oil Analysis/Environmental Monitoring NTPC Mouda – Chemistry Department 2

3. Coal Sampling

4. Coal Sampling(Preparation) Doing Coning & Quartering of Dried Coal Sample Crushing coal sample to get -212 micron size through Jaw, Roller & Pulveriser Crushe

5. Effluent Treatment 5

6. Raw Water – Clarified Water – DM Water Raw Water Source : Pondage created by Gosikhurd Dam across river Wainganga Intake Point : 24 Km South - East of Plant near Village - Pipari, Distt. - Bhandara Raw water Wet Ash Disposal Fire Water Tanks Clarified Water Filtered Water Demineralised Water HVAC Condenser Cooling Water Potable Water Gravity Sand Filtration Pre Treatment Demineralisation Service Water System Raw Water

7. Pre Treatment of Raw Water 7 Pre-Treatment of Raw water is done to make Clarified water which is used in Cooling water system, HVAC System and for producing filtered water. Chemicals used in Pre-treatment : Alum Solution : Alum solution is used to reduce turbidity of water. It works by coagulating and precipitating suspended matter. It decreases pH of water during pre-treatment. Poly-Aluminium Chloride Solution : It has similar function as that of Alum however decrease of pH is less as compared to alum solution. Chlorine dioxide : It is a biocide/disinfectant used to remove microorganisms and organic matter. It is a safer option than Chlorine gas solution. Lime solution : It is used to elevate pH of water (if required) During pre-treatment of raw water, it is aerated first in aerator and then Alum/PAC solution is dosed along with Chlorine dioxide, afterwards the water goes to Clarifier where clarification takes place. For production of Filtered water, the clarified water is passed through Gravity Sand Filter.

8. Filtration of Clarified Water to produce Filtered Water 8

9. Pre treatment Plant(GSF) 9

10. Pre-Treatment Plant Parameter (PT Plant) 10 pH Cond. (µS/cm) Turb. (NTU) Clo2 Raw Water 7.0 – 8.0 350-900 -- -- Clarifier 1 6.8 – 7.5 350-900 < 10 < 0.5 Clarifier 2 6.8 – 7.5 350-900 < 10 < 0.5 Clarifier 3 6.8 – 7.5 350-900 < 10 < 0.5 DM Clarifier 6.8 – 7.5 350-900 < 10 < 0.5 DM GSF 6.8 – 7.5 350-900 < 1 < 0.5 PT GSF 6.8 – 7.5 350-900 < 1 < 0.5 Potable Water 6.8 – 7.5 350-900 < 1 < 0.5 Filter Water 6.8 – 7.5 350-900 < 1 < 0.5

11. Steam Cycle 11 Condenser Hotwell Condensate Extraction Pump (CEP) Gland Steam Conderser CPU Drain Cooler (DC) LPH Deaerator Feed Storage Tank (FST) Boiler Feed Pump (BFP) HPH Economizer STEAM DRUM

12. 12 Condensate Polishing Unit (CPU)

13. 13 Resin Transfer Procedure In Condensate Polishing Unit (CPU) CPU VESSEL SCRV ARV MSRV

14. 14

15. 15 Condensate Polishing Unit (CPU) Parameter Parameter UOM Limit Specific Conductivity µS/cm < 1 ACC µS/cm < 0.1 Vessel DP KSC < 2.1 Vessel RT KSC < 0.35 Sodim PPB 2.0 Flow m 3 /hr. 545 System DP KSC 3.5

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