Decanter Centrifuge for Sludge Thickening and De-Watering

WIMES 7.01 Page 31

APPENDIX C - DATA SHEET

DECANTER CENTRIFUGE FOR SLUDGE THICKENING AND DE-WATERING

PROJECT TITLE (P) / DOCUMENT REFERENCE (P)
PROJECT NUMBER (P) / REVISION (P)
PROJECT LOCATION (P) / DATE (P)
CENTRIFUGE SUPPLIER (P/S) / REF DRAWINGS (included/not included) (P)
TAG NO/ASSET CODE (P)

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Key

* - Indicates Purchaser’s default requirement

2.0 GENERAL

2.1 General

5 / Number of Identical Centrifuges Reqd. (P)

3.0 OPERATING ENVIRONMENT AND SITE DETAILS

1 / Type of Installation (ü) (P/S)
Mobile
Semi-mobile (i.e. on stilts/jacks)
Permanent
2 / Possible Operating Environment(s) (P)
Location(s) (ü)
Inland
Coastal
Inside
outside
Other (specify)
Hazardous Area Classification(s) (ü)
None
Zone 1
Zone 2
EMC Environment(s) (ü)
Class B - light industrial
Class A - industrial
3 / Ambient Air Temp/RH (10°C-40°C/< 95%*) (P)
4 / Special Environmental Hazards (P)
5 / References For Further Information (P)

4.0 FEED SLUDGE AND FLOCCULANT CHARACTERISTICS

1 / Feed Sludge(s) (P)
Type
Raw/digested
Proportions (By DS) (P) / %
Primary
SAS
Humus
Other (specify)
2 / Feed Sludge Screening (P)
Screened sludge (Y/N)
Aperture size/type (e.g.6 mm slot)
3 / Solids Details(P)
Content (min-max) (wt%)
Particle size range (µm)
Grit content (high/low)
Rag content (high/low)
4 / Feed Sludge Properties (P) (If Known)
Age (septicity)
pH
Vapour pressure (barabs)
Salinity (Peak/average) (mg Cl/l)
Newtonian/ nonNewtonian
Kinematic viscosity (cSt)
Density (kg/m3)
Polythickened (Y/N)
Temperature (inlet) (°C) / Min / Max
4 / Adverse or Hazardous Properties (ü) (P)
Toxic
Corrosive
Abrasive
Odorous
Other (specify)
5 / Flocculant Details (P/S)
6 / Details of Other Chemicals Added to the Feed Sludge (P)
7 / Other Sludge/Flocculant Properties (IfKnown) (P)

5.0 PERFORMANCE SPECIFICATION

5.1 General

1 / Design Life (Years) (P)

5.2 Duty, Operating Speeds and Absorbed Power

1 / Duty/Utilisation (P)
Hrs per day
Days per week
2 / Method of Bowl Speed Variation (ü) (P/S)
Fixed speed motor with variable drive belt pulley ratios
Variable speed motor
Hydraulic motor
Other (specify)
2 / Maximum Bowl Speed (rpm) (P/S)
3 / Method of Scroll Conveyor Speed Variation (ü) (P/S)
Fixed speed motor with variable drive belt pulley ratios
Variable speed motor
Hydraulic motor
Other (specify)
4 / Bowl/Scroll Differential Speed Range (rpm) (S)
5 / Maximum Absorbed Power (kW) (S)

5.3 Process Performance

1 / Thickened/De-watered Sludge Solids Content (wt %) (P)
Required range (minmax)
2 / Solids Recovery (P)
Minimum required
3 / Centrate Solids Content (ppm ss) (P)
Maximum allowable
4 / Sludge Throughput (m3/hr) (P/S)
Required range (minmax) (P)
Maximum achievable (S)
5 / Flocculant Dosing Rate (kg/tds)
Maximum required (S)

5.4 Noise and Vibration

5.4.1 Noise

1 / Expected Noise Levels (dB (A) at 1 m) (S)
2 / Acoustic Hoods/ Cladding Required (Y/N) (S)

5.4.2 Vibration

2 / 1st Critical Speed (% of Maximum Bowl Speed) (>130*) (P/S)

5.5 Life Cycle Costs

5.5.1 Energy Consumption

1 / Specific Energy Consumption (P/S)
Process Conditions (P)
Sludge throughput (m3/hr)
Feed sludge solids content (wt %)
Thickened/de-watered sludge solids content (wt%)
Energy Consumption (kWhrs/tds) (S)

5.5.2 Service Lives and Costs of Components

1 / Expected Service Lives of Components
Component (specify) (P) / Life (x 103 hrs) (S)
2 / Costs of Components (£)/Time Required to Replace Components (hrs) (S)
Component (specify) / Cost / Time

6.0 DESIGN SPECIFICATION

6.1 General

6.1.2 Weights and Lifting Arrangements

1 / Weights (kg) (S)
Overall weight
Maximum maintenance lift
Maximum erection lift
2 / Details of Any Special Lifting Accessories Required for Centrifuge Removal/ Installation (S)

6.1.4 External Corrosion Protection

5 / Coating Specification (WIMES 4.01*) (P)

6.1.5 Guarding

6 / Timed Interlock or Back EMF Switches Required (Y/N) (P)

6.1.6 Condition Monitoring

1 / Additional Types of Condition Monitoring Required/Provided (ü) (P/S)
Bowl/scroll differential speed
Scroll conveyor torque
Bearing lubricant level/flow
Other (specify)
2 / Sensor Fixing Arrangements (P)

6.1.7 Information Plate

1 / Data Required/Provided on Information Plate (ü) (P/S)
Manufacturer
Date of manufacture
Centrifuge type
Serial number
Max. bowl speed (rpm)
G-force
Bowl diameter (mm)
Max. power input (kW)
Weight (kg)
Asset code
Other (specify)

6.1.9 LV Assembly and Associated Electrical Installation (If Specified/Supplied)

1 / LV Assembly Required/ Provided (Y/N) (P/S)
2 / LV Assembly and Electrical Installation Specification (WIMES3.04*) (P)

6.1.10 Maintainability

2 / Maintenance Platform Required (Y/N) (P)
2 / Reference for Platform Specification (P)

6.1.11 O & M Manuals

1 / Reference for Particular Specification (P)

6.2 Base Frame(s)

1 / Material (P/S)

6.3 Casing and Connections

6.3.1 Casing

2 / Material (P/S)
3 / Sealing Arrangements (P/S)
4 / Centrifuge to Operate with an Odour Control System (Y/N) (P)

6.3.2 Connections

6.3.2.1 General

1 / Vibration Isolation Facilities Provided (S)

6.3.2.2 Feed Sludge & Flocculant Inlet Arrangements

1 / Inlet Pipe and liner Materials (P/S)
3 / Inlet Pipe Bore and Method of Connection to Fixed Pipework Installation (ü) (P/S)
Nominal Bore (mm)
Flanged connection (specify PN rating)
Hose tail connection

6.3.2.3 Centrate Discharge Arrangements

1 / Funnel/Stilling Box Features Provided to Allow Centrate Sampling (ü) (S)
Inspection panel
Access panel
Sampling point
Other (specify)
2 / Discharge Pipe Details (P/S)
Nominal bore (mm)
Flange specification (e.g. PN 10)

6.3.2.4 Thickened/De-watered Sludge Discharge Arrangements

1 / Discharge Manifold Features Provided to Allow Sludge Sampling (ü) (S)
Inspection panel
Access panel
Sampling point
Other (specify)
2 / Facilities Provided for Clearance of Blockages (S)
3 / Method of Removing Thickened/ Dewatered Sludge (ü) (P/S)
Gravity
Pump
Screw/belt conveyor
Other (specify)
4 / Divert Valve Required (Y/N) (P)

6.3.2.5 Washwater Provisions/Requirements

1 / Washwater Provisions/Requirements
Pressure Range (bar)
Available on site (P)
Required (S)
Flow Range (l/min)
Available on site (P)
Required (S)
Type(s)
Available on Site (ü) (P)
Final effluent
Potable water
Required (ü) (S)
Final effluent
Potable water
2 / Actuated Valve Type (ü) (P/S)
Full bore, ¼ turn
Solenoid

6.4 Bowl

1 / Dimensions of Cylindrical Section (S)
Internal diameter (mm)
Internal length (mm)
2 / Dimensions of Conical Section (S)
Taper angle (°)
Length (mm)
2 / Stepped Conical Section (S)
Provided (Y/N)
Number of steps
3 / Material (P/S)
5 / Method of Protecting Sludge Discharge Ports Against Abrasive Wear (ü) (P/S)
Replaceable liner/ sleeve (specify/state material)
Wear resistant coating (specify/state type)
Other (specify)
6 / Method of Protecting Inner Surface of Bowl Against Abrasive Wear (ü) (P)
Longitudinal wear strips*
Replaceable liner/sleeve (specify/state material)
Wear resistant coating (specify/state type)
Other (specify)

6.5 Scroll Conveyor

1 / Material (P/S)
2 / Scroll Flights (S)
Pitch (mm)
Pitch reduces towards discharge ports (Y/N)
3 / Method of Protecting Distributor/Inlet Ports Against Abrasive Wear (ü) (P/S)
Replaceable liner /sleeve (specify/state material)
Wear resistant coating (specify/state type)
Other (specify)
4 / Method of Protecting Flight Tips and Flanks Against Abrasive Wear (ü) (P/S)
Replaceable tiles (specify/state material)
Wear resistant coating (specify/state type)
Other (specify)

6.6 Bearings and Bearing Lubrication

6.6.2 Main Bearings

1 / Bearing Details (S)
Manufacturer
Designation
2 / Lubricant Details (P/S)
Oil/grease
Grade
2 / Method of Bearing Lubrication (ü) (P/S)
Manual re-greasing
Single point automatic lubricators
Centralised pumped lubrication system
3 / Minimum Capacity/Life of Automatic Lubricators (cc/mths) (P/S)

6.6.3 Scroll Conveyor Bearings

1 / Bearing Details (S)
Manufacturer
Designation
2 / Lubricant Details (P/S)
Oil/grease
Grade
2 / Method of Bearing Lubrication (ü) (P/S)
Manual re-greasing / ü

6.7 Drive Systems

6.7.1 Bowl Drive

1 / Type of Bowl Drive (ü) (P/S)
a / Fixed speed electric motor
b / Variable speed electric motor
c / Variable speed hydraulic motor

6.7.1.1 Electric Motor (If Specified/Supplied)

1 / Motor Specification (WIMES 3.03*) (P/S)
2 / Method of Power Transmission From Motor to Bowl (ü) (P/S)
Belt and pulley
Belt and pulley with fluid coupling
Direct coupling
Other (specify)
3 / Method of Overload Protection (ü) (P/S)
Current monitoring
Torque monitoring
Other (specify)

6.7.1.2 Hydraulic Motor (If Specified/Supplied)

1 / Hydraulic Power Pack Details (P/S)
Motor rating (kW)
Maximum operating pressure (bar)
Control panel spec. (WIMES 3.04*)
Motor specification (WIMES 3.03*)
Coating specification (WIMES 4.01*)
1 / Hydraulic System Details (P/S)
Oil reservoir capacity (l)
Oil grade
Maximum oil pump delivery (l/min)

6.7.2 Scroll Conveyor Drive

1 / Type of Drive (ü) (P/S)
a / Fixed speed electric motor (common to bowl)
b / Variable speed electric motor (common to bowl)
c / Variable speed electric motor (separate to bowl)
d / Variable speed hydraulic motor (common to bowl)
e / Variable speed hydraulic motor (separate to bowl)
2 / Method(s) of Speed Control Available (S)

6.7.2.1 Electric Motor (If Specified/Supplied)

1 / Motor Specification (WIMES 3.03*) (P/S)
2 / Method of Power Transmission from Motor to Scroll Conveyor (ü) (P/S)
Belt and pulley
Belt and pulley with fluid coupling
Direct coupling
Other (specify)
3 / Method of Overload Protection (ü) (P/S)
Current monitoring
Torque monitoring
Other (specify)

6.7.2.2 Hydraulic Motor (If Specified/Supplied)

1 / Hydraulic Power Pack Details (P/S)
Motor rating (kW)
Maximum operating pressure (bar)
Control panel spec. (WIMES 3.04*)
Motor specification (WIMES 3.03*)
Coating specification (WIMES 4.01*)
1 / Hydraulic System Details (P/S)
Oil reservoir capacity (l)
Oil grade
Maximum oil pump delivery (l/min)

6.7.2.3 Gearbox (If Specified/Supplied)

1 / Gearbox Details (P/S)
Type
Number of stages
Manufacturer
Service factor
2 / Gearbox Lubricant (P/S)
Type (oil/grease)
Grade
Manufacturer
2 / Method of Lubrication (ü) (P/S)
Sealed for life
Re-lubrication facilities required/provided (i.e. oil drain/fill points etc.)

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7.0 TESTS

7.1 Test Regime (Clause 7.1.1)

Type of Test
(P) / Test Location (ü)
(P) / Witnessing Reqs
(P) / Test Standard
(P/S) / Acceptance Levels & Tolerances (P)
Works / Site / (Y/N) / Notice (Days)
Absorbed power (at duty point) / kW
Range of sludge cake solids contents / wt %
Minimum solids recovery
Maximum centrate solids content / ppm ss
Range of sludge throughputs / m3/hr
Maximum flocculant dosing rate / Kg/tds
Maximum sludge cake flocculant content / wt %
Noise / dB (A)
Vibration / BS ISO 10816 / mm/s
Other (specify)

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APPENDIX D – SUPPLIER’S SUPPLEMENTARY DATA SHEET INFORMATION

Clause / Supplementary Information

ISSUE 4 OCTOBER 2013