Finnchain System for Rectancular Tanks. Keeping up your process International product development.

Finnchain System for Rectancular TanksFinnchain System for Rectancular Tanks

Keeping up your process

International product developmentInternational product development


Finnchain System for Rectancular Tanks


Finnchain System: Bottom and surface collector

TYPE A: Bottom & surface collector TYPE F: Cross collector


Finnchain System: Bottom sludge scraper system

TYPE B: Bottom collector TYPE C: Bottom collector for LAMELLA tanks


Finnchain System: Surface skimmers

TYPE D: Surface scum skimmer TYPE D1: Oil skimmer


Finnchain System: Grit scrapers

TYPE E: Grit scraper with FLIGHTS TYPE E1: Grit scraper

with BUCKETS


Patented drive wheel with pulling pin construction

• The only wearing part of drive wheel is the pulling pin which is easy and fast to replace


Long lifetime and operational reliabilityLong lifetime and operational reliability


Otsikko?

Sprocket wheel with teeth driven chain Drive wheel with adjustable pitch for Notched-link chain


Otsikko?

PIN wears the bushing from inside

IDLER WHEEL wears bushing from outside

• Bushing wears quickly• Breaking strength of the chain

in proportion to wear rate

• Longer lifetime for bushing• High breaking strength of the chain

maintains longer

DRIVE SPROCKET

wears bushing from the outside

PIN wears bushing from

the inside

DRIVE WHEEL’S PULLING PIN wears the chain

notch

IDLER WHEEL wears the minimum

of the chain’s bottomsurface



Bearing area comparison data sheet

PIN CHAIN (DIN 8150) NCS 720S



Bearing area comparison data sheet

Pin Chain (DIN 8150)

NCS 720S

Finnchain HA205M

Finnchain HA200M

Chain type

160

152

206

198

mm

Chain Pitch

JointBearing area

Notch Bearing area

Allowed working load calculated according to bearing area

mm2 mm2 kg

1170 1300 1080

1320 1640 1180

1104 972 875

600 988 540


Reliability and operational dependability

Reliability and operational dependability


Notched-link chains for rectancular tanks

HA200M HA205M HA44M• Chain for small to medium tanks

• Chain for medium to large tanks

• Drive chain • Chain for small tanks with

limited operation space


Drive wheel with adjustable pitch• The mutual distance of pins increases by

relocating them by the same number of slots towards A

• Perfect match between chain and wheel within operational lifetime

• Always several (4-5) pins pulling the chain• Minimizing the wear of the chain


Comparison of working load with NEW chains:Sprocket wheel with teeth driven chain Drive wheel with adjustable pitch for

Notched-link chain

• The workign load is divided between several pulling teeth/pins and chain links


Comparison of working load with USED chains:

• Entire work load pulled by one tooth mainly

• Other teeth have lost the pullign contact with the chain

• The pitch of the pulling pins have been adjusted perfectly to match with worn and elongated chain

• The workign load is divided between several pullign pins and cahin links



Lifetime comparison

— Finnchain HA-chains with variable pitch drive wheel

— Traditional chains with sprocket wheel

Wear


Scraper flights rectangular tanks

FC-190 FC-200 FC-220• For tanks width 1.5-6,5 m • Height 190mm

• For tanks width 6,5-8,5m• Height 200mm

• For tanks width 8-10m• Height 220mm


Scraper flights rectangular tanks

FC-300 FC-310• For tanks width up to 9m • Height 300mm

• For tanks width up to 12m• Height 310mm


Scraper flight data sheetFlight Types

Dimensions

mm

Thickness

mm

Weight

Kg/m

Cross Sect. Area

mm2

Moment of Inertia

mm4

Polar Moment of Inertia

mm4

X - X Y - Y X – X Y – Y LV

FC-190 190 x 71 x 2.5 2 x 2.5 2 x 2.5 2 1098 3337865 611259 479313

FC-200 200 x 100 x 2,5 2 x 2.5 2 x 2.5 2.6 1344 5724000 1152500 2520000

FC-220 220 x 120 x 3 3 x 3 2 x 3 4 2315 10891285 5101358 7012345

FC-300 300 x 100 x 2,5 2 x 2.5 2 x 2.5 3.2 1702 11183000 1664100 2521000

FC-310 310 x 120 x 3 3 x 3 2 x 3 5.6 2823 19917118 5600130 7013038


Attachment of scraper flight

Competing system Finnchain system

• Flight attached to the attachment link• High pulling line ->vibration • The wider tank, the higher flight

makes the problem worser

• Flight attached to the patented flight end connector

• Pulling line in the middle of the flight


Torsion test for scraper flight

Traditional system Finnchain system

• Flight type NLC-145• Open sigma profile• Torsion

• Flight type FC-190• Closed hollow profile • No torsion


Problem: Chain skippingSolution: Chain watch• If the system meets rapid and heavy increase of the

workload that jamms the movement of the system, normally the plastic chain lifts off from the pulling pin or sprocket’s teeth

• Without any safety devices the chain skipping could cause damages such as:• The flights do get misaligned and will drop off from the

return rails

• The chain can broke

• Flights and flight end connectors can broke

• Afterwards the system is a long time non-usable because of extensive and expensive repair


Problem: Chain skippingSolution: Chain watch• The chain watch is installed above sprocket and it

mechanically prevents chain skipping

• The movement of the lever on top of the chain activates the inductive switch at desired over load and stops the motor immediately, also alarm signal can be activated

• The chain watch stops the system before any damage can happend


Idler wheel

• Teethless, does not wear the chain

• Installation with retaining rings, easy to install and replace

• FC-1P/76 with 76,1 mm hub bore for small to medium tanks

• FC-1P/80 with 80mm hub bore from big tanks


Idler wheel shaft

• Can be installed/positioned close to the end wall turning

• Sludge can be collected away from the corners

• Axial adjustment to ease installation


Drive shaft

• Drive shaft is made of AISI 304 or AISI 316 stainless steel

• Shaft diameter 80 mm


Drive shaft Bearing

• Self aligning bearing

• Self adjusting

• Water lubricated

• Long lifetime because of wide bearing area


Bottom rail

• Bottom rail FC-122, ease to install and replace

• Two types: smooth and with guiding track

• Connected to eachother with attachment piece

• Attachment piece is well anchored to tank floor

• Thermal expansion is allowed


Drive unit

• SEW-Eurodrive 0,18-0,55 kW, power depends on tank dimensions

• Integrated motor and gear box – one package

• Standard speed of system is 1,2 m/min

• Customized speed with inverter or specified gear box


Electrical wiring diagram

• Standard motor 3-phase, supply 380-415V 50Hz

• Inductive switch of the chain watch, supply 24V DC – left and right sides

• Options available by request


High quality patented solutions High quality patented solutions


References• Psyttalia WWTP, Athens Greece

• 128 sludge scareper systemsin operation since 2002-2004


References• Project Besos, Barcelona Spain

• 90 sludge scraper systemsin operation since 2005-2006


References case: Hämeenlinna WWTP, Finland


References case: Hämeenlinna WWTP, Finland• Rectangular tank: length 35m and width 7m for primary sedimentation• First system installed 1984 following systems -85, -89 and -90, together 16

systems• Sludge scraper system has been in continuous operation since 1984 until 2004

when system was modernized: chain, drive wheel, flights and chain watch• Tank has been emptied and cleaned every 3 year for maintenance purposes• During 1984 – 2004 following spare parts has been replaced only once:

• Wear pads of flights• Idler wheels• Roller drive chain 20B-1


References case: Hämeenlinna WWTP, Finland• 1700 installations worldwide in June 2007, for example:

• Australia, Austria, Czech Republic, China, Curacao, Denmark, Estonia, Finland, Germany,

Greece, Hong Kong, Hungary, Indonesia, Iran, Israel, Italy, Japan, Latvia, Lithuania, Malaysia,

Netherlands, New Zealand, Norway, Oman, Philippines, Poland, Portugal, Russia, Saudi-Arabia,

Slovenian, Spain, Sudan, Sweden, Switzerland, Taiwan, Thailand, United Kingdom, Vietnam…

• Longest tanks 98 m, width 10,5 m

• Widest tanks 12,6m, length 30 m

• Examples of big deliveries:• Malaysia Puchong (w-l) 4,9m – 49m, 32 tanks for primary sedimentation, type-A• Malaysia Bunus (w-l) 4,9m – 23m , 32 tanks for primary sedimentation, type-A • Russia Yekaterinburg (w-l) 12m – 63m, 8 tanks for secondary sedimentation, type-A• Vietnam Ho Chi Minh (w-l) 5m – 26m, 20 tanks for secondary sedimentation, type-A• Vietnam Ho Chi Minh (w-l) 5m – 13m, 20 tanks for primary sedimentation, type-A


Thank youThank you

Date post:	29-Mar-2015
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Finnchain System for Rectancular Tanks. Keeping up your process International product development.

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