Slurry Pumping Handbook - AU - .There are a large number of differing pump types used in the pumping

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Transcript of Slurry Pumping Handbook - AU - .There are a large number of differing pump types used in the pumping

Issued: Feb 2000

WARMAN INTERNATIONAL LTD

WARMANSLURRY PUMPING

HANDBOOK

Australasian Version: Feb 2000

Warman International Ltd. is the owner of the Copyright subsisting in this Manual. The Manual may notbe reproduced or copied in whole or in part in any form or by any means without the prior consent inwriting of Warman International Ltd.

Slurry Pumping Handbook AU Page 2 Issued: Feb 2000

WARNINGS

IMPORTANT SAFETY INFORMATION

The WARMAN PUMP is both a PRESSURE VESSEL and a piece of ROTATINGEQUIPMENT. All standard safety precautions for such equipment should be followedbefore and during installation, operation and maintenance.

For AUXILIARY EQUIPMENT (motors, belt drives, couplings, gear reducers, variablespeed drives, etc.) standard safety precautions should be followed and appropriate instructionmanuals consulted before and during installation, operation, adjustment and maintenance.

All guards for rotating parts must be correctly fitted before operating the pump includingguards removed temporarily for gland inspection and adjustment.

DRIVER ROTATION MUST BE CHECKED before belts or couplings are connected.Personnel injury and damage could result from operating the pump in the wrong direction.

DO NOT OPERATE THE PUMP AT LOW OR ZERO FLOW CONDITIONS FORPROLONGED PERIODS, OR UNDER ANY CIRCUMSTANCES THAT COULDCAUSE THE PUMPING LIQUID TO VAPORISE. Personnel injury and equipmentdamage could result from the pressure created.

DO NOT APPLY HEAT TO IMPELLER BOSS OR NOSE in an effort to loosen theimpeller thread prior to impeller removal. Personnel injury and equipment damage couldresult from the impeller shattering or exploding when the heat is applied.

DO NOT FEED VERY HOT OR VERY COLD LIQUID into a pump which is at ambienttemperature. Thermal shock may cause the pump casing to crack.

FOR THE SAFETY OF OPERATING PERSONNEL, please note that the informationsupplied in this Manual only applies to the fitting of genuine Warman parts and Warmanrecommended bearings to Warman pumps.

LIFTING PUMP COMPONENTS Tapped Holes (for Eye Bolts) and Lugs (for Shackles) on Warman Parts are for lifting

Individual Parts Only. Lifting devices of adequate capacity must be used in conjunction with these assembly and

maintenance instructions wherever they are required to be used. Sound, safe workshop practices should be applied during all assembly and maintenance

work. Personnel should never work under suspended loads.

FULLY ISOLATE THE PUMP before any maintenance, inspection or troubleshootinginvolving work on sections which are potentially pressurised (eg casing, gland, connectedpipework) or involving work on the mechanical drive system (eg shaft, bearing assembly,coupling):- Power to the electric motor must be isolated and tagged out. It must be proven that the intake and discharge openings are totally isolated from all potentially

pressurised connections and that they are and can only be exposed to atmospheric pressure.

Slurry Pumping Handbook AU Page 3 Issued: Feb 2000

CONTENTS

WARNINGS ..........................................................................................................................2

CONTENTS ..........................................................................................................................3

SECTION 1: INTRODUCTION..............................................................................................5

1.1 Purpose of this Handbook ...................................................................................51.2 Definition of a Slurry............................................................................................51.3 Characteristics of a Slurry ...................................................................................51.4 What is a Slurry Pump ........................................................................................51.5 Components of a Slurry Pump ............................................................................61.6 Range of Applications of a Slurry Pump ..............................................................81.7 Concepts of Material Selection............................................................................9

SECTION 2: DEFINING YOUR APPLICATION & CONSTRAINTS ....................................11

2.1 Properties of a Slurry ........................................................................................112.2 Volume/Flow Rate.............................................................................................152.3 Pipeline Length .................................................................................................152.4 Static Head Required ........................................................................................152.5 Pipe Size...........................................................................................................152.6 Pump Performance Graphs...............................................................................162.7 System Resistance Curves ...............................................................................182.8 Other Design Constraints ..................................................................................20

SECTION 3: SELECTING THE APPROPRIATE PUMP .....................................................27

3.1 Determine the Flow Rate...................................................................................273.2 Determine the Static Head ................................................................................273.3 Determine the Pump Head & Efficiency Corrections .........................................273.4 Determine the Pipe Diameter ............................................................................273.5 Calculate the Friction Head Loss.......................................................................273.6 Calculate the Total Dynamic Head ....................................................................283.7 Select Pump Type & Materials ..........................................................................283.8 Pump Selection.................................................................................................283.9 Determine the Pump Speed ..............................................................................293.10 Calculate the Required Power...........................................................................293.11 Additional Design Considerations......................................................................293.12 Typical Pump Calculation..................................................................................32

APPENDIX 1 PUMP TYPES ............................................................................................37

Introduction ................................................................................................................37Horizontal Pumps - Lined ...........................................................................................37Horizontal Pumps - Unlined........................................................................................40

Slurry Pumping Handbook AU Page 4 Issued: Feb 2000

Vertical Pumps...........................................................................................................44Jet Pumps ..................................................................................................................47

APPENDIX 2 MATERIALS ..............................................................................................48

Introduction ................................................................................................................48

APPENDIX 3 SLURRY FRICTION HEAD LOSSES IN PIPELINES.................................57

Introduction ................................................................................................................57Homogeneous Slurries: (Particles Essentially all Finer than 50m)............................57Heterogeneous Slurries: Category A ........................................................................57Heterogeneous Slurries: Category B ........................................................................59Heterogeneous Slurries: Category C ........................................................................60Heterogeneous Slurries: Category D ........................................................................60Estimation of Friction Head Losses for Clear Water ...................................................60

APPENDIX 4 TOTAL DYNAMIC HEAD...........................................................................64

Abstract......................................................................................................................64Relationships between Head, Specific Gravity and Pressure or Vacuum ...................65Total Dynamic Head...................................................................................................65Estimation of Total Dynamic Head .............................................................................67Separate Estimates of Suction Head & Discharge Head ............................................67

APPENDIX 5 LIMITING SETTLING VELOCITY ..............................................................71

General Notes............................................................................................................71Determination of Limiting Settling Velocity..................................................................71Effect of Pipe Diameter on Limiting Velocity ...............................................................73

APPENDIX 6 NET POSITIVE