Industrial Application. Pulp and Paper

Transcription

1 Pulp and Paper Industrial 1 Application

2 Content > Process description > > Potential identification in product portfolio > Prefered materials > Reasons for pump breakdowns > List of abbreviations > Reference 2

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4 Main > Chipper house > Pulp mill > Recovery mill > Paper machine > Caustic and chlorination plant > Captive power plant (thermal, cogeneration) > Water and waste water treatment > Central utilities (FF, HVAC) 4

5 Way of Recovery mill Water and waste water treatment plant Chipper House Pulp mill Paper machine Caustic and chlorination plant Captive power plant Fire Fighting for plant & township Central utilities for plant & township Water source intake river or borewell 5

6 Chipper house Chipper house operations ph-value: 7-9 temp.: ambient density: 1 SCP Pump casing: cast iron /cast steel impeller: cast iron / CF8M shaft: carbon steel/ss410 sealing: gland pack 6

7 Pulp mill Pulp mill operations ph-value: 7-11 temp.: ambient-50 C density: viscosity: 3-7 cp consistency: 1-6% PN ISO casing: cast iron/cf8m impeller: CF8M/alloy No.7 shaft: SS410/SS316 sealing: gland pack/ mechanical seal KF/KN/SK Paperstock pump 7

8 Recovery mill Recovery mill operations ph-value: 7-11 temp.: ambient-90 C density: viscosity: 1 cp Ring Section PN ISO casing: cast steel/cf8m/ CA6NM impeller: CF8M /CA6NM shaft: SS410/SS316 sealing: gland pack/ mechanical seal 8

9 Caustic and chlorination plant Caustic and clorination plant operations ph-value: 7-11 temp.: ambient density: viscosity: 1 cp PN ISO casing: CF8M impeller: CF8M shaft: SS316 sealing: mechanical seal 9

10 Paper machine White and press water processs ph-value: 7-11 temp.: ambient-50 C density: viscosity: 3-7 cp consistency: 1-6% SCP pump PN ISO casing: cast iron/cf8m impeller: CF8M /alloy No.7 shaft: SS410/SS316 sealing: gland pack/ mechanical seal Non clog 10

11 Captive power plant Captive power plant operations ph-value: 7.0 temp.: C density: 1 viscosity: 1 cp ET ISO casing: cast iron /stainless steel impeller: cast steel/cf8m SCP Pump Ring section VT shaft: SS410 sealing: gland pack/ mechanical seal PNV Batterfly valve Body: cast iron/carbon steel Disc: cast iron Shaft: SS410 11

12 Water and waste water treatment plant Water and waste water treatment plant operations ph-value: 7.0 temp.: C density: 1 viscosity: 1 cp ET ISO SCP Pump casing: cast iron /stainless steel impeller: cast steel/cf8m shaft: SS410 sealing: gland pack/ mechanical seal VT Batterfly Valve Body: cast iron/carbon steel Disc: cast iron Shaft: SS410 12

13 Central utilities Central utilities operations ph-value: 7.0 temp.: C density: 1 viscosity: 1 cp ET ISO SCP Pump casing: cast iron/stainless steel impeller: cast steel/cf8m shaft: SS410 sealing: gland pack/ mechanical seal Ring section MVI PNV 13

14 Reasons for pump breakdowns Sympton Motor tripping Breaking of shaft Casing cracked down Erosion, Corosion on wetted parts Damage of rotating parts Non fulfillment of hydraulic parameters and getting frequent failures Causes in cases of excessive safety factor, doing flushing porpose at the time of commissioning misalignment pump and motor: coupling levelling of base plate pipelines are stressed direct to the pump, casing flanges (material pipes mainly MS: mild steel) wrong material selection reverse rotation because non return valve fails working under closed valve conditions (suction and discharge side), entry of foreign particles development of own spare parts (wrong materials and dimensions) to save costs 14

15 List of abbreviations shortcut CF8M CA6NM Alloy No.7 cp meaning stainless steel alloys (austenitic chromium-nickel alloys) high alloy cast steel with iron-chromium-nickelmolybdenum alloy of low carbon content specification by M+P centipoise (obsolate), mpas (new) 15