Technical leadership is built with innovation

Finnchain is known for its continuous product development. After over 30 years of manufacturing chain scraper systems, we have managed to take our product’s durability and service life to the next level.

 

 

PRODUCT DEVELOPMENT WITH

 

Patented technology

 

PRODUCT DEVELOPMENT

Finnchain Oy designs, manufactures and installs top-quality sludge scraper systems for water and wastewater treatment processes. We offer a reliable, low-maintenance system, comprising of the latest technology in the field. 

We develop our product continuously in order to deliver on our promise of quality. The several international patents granted for our innovations and our success in the global market are a testament to our successful product development. In 2008, the President of Finland rewarded Finnchain Oy the INNOSUOMI award as a recognition of our innovative work and our efforts to improve the company’s competitiveness.

 

Scraper innovations for rectangular tanks

PATENTED COLLECTOR CHAIN

WIDE BEARING SURFACE AREA GUARANTEES LONG SERVICE LIFE

TRADITIONAL MODEL:
NARROW BEARING
SURFACE AREA

The cog and the chain share
a smaller surface area.
 

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FINNCHAIN SOLUTION:
WIDE BEARING
SURFACE AREA

The driving wheel is in contact with the entire
width of the chain, as a result, the pulling pin and
the chain share a larger surface area.

files/img/kuvitus/kuljetinketju_finnchain_ratkaisu.jpg

 

Chain models

COLLECTOR CHAIN
HA200

Small and medium size tanks
Bearing surfaces
- Joint 1,170 mm²
- Tooth notch 1,300 mm²

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COLLECTOR CHAIN
HA205

Medium size and large tanks
Bearing surfaces
- Joint 1,300 mm²
- Tooth notch 1,640 mm²

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DOUBLE CHAIN
HA205X2

For the largest tanks
Bearing surfaces
HA205X2

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PATENTED DRIVE WHEEL

ADJUSTABLE-PITCH DRIVE WHEEL

The drive wheel made of stainless steel rotates the collector chain. The drive wheel is a patented adjustable-pitch drive wheel which extends the service life and improves the reliability of the chain and wheel. The plastic sleeves are the only components subject to wear on the drive wheel. The plastic sleeves can be replaced and the drive wheel can be adjusted without lifting the chain off the wheel.

PATENTED CHAIN WATCH

PATENTED CHAIN WATCH

As the chain stretches or wears through time, the chain pitch may not correspond to the drive wheel pitch and the entire load is pulled with one or two links at a time. In this case, the chain must be kept tight as it easily jumps off the drive wheel. Finnchain system’s Chain Watch removes this problem; Chain Watch mechanically prevents the chain from jumping off the drive wheel. An electrical switch can also be connected to the Chain Watch, which shuts off the motor in the event of an overload.

PATENTED SCRAPER FLIGHTS

CLOSED PROFILE MAKES SCRAPER FLIGHTS STRONG AND DURABLE

The closed profile and high fibreglass content (60–70%) prevent Finnchain’s scraper flights from bending, and provide maximum strength and durability, even in large tanks. Our selection contains 5 different scraper flight profiles – we have the solution for all tank sizes and sludge quantities!
 
The higher the flight installed, the more it causes scraper vibration and chain wear. The problem is particularly challenging with wide tanks which require high scraper flights for moving larger masses of sludge. Finnchain’s patented scraper flight system avoids this problem by reducing vibration to the minimum.
 

 

 

Finnchain system’s scraper flight profiles

 

  Scraper flight Height,
mm
Moment of inertia,
mm4
Torsional moment,
mm4
files/img/kuvitus/flight-profile-fc-190.jpg FC-190 190 X – X : 3 605 000
Y – Y : 376 100
479 313
files/img/kuvitus/flight-profile-fc-200.jpg FC-200 200 X – X : 5 724 000
Y – Y : 1 152 500
2 520 000
files/img/kuvitus/flight-profile-fc-220.jpg FC-220 220 X – X : 10 881 245
Y – Y : 5 083 635
7 012 345
files/img/kuvitus/flight-profile-fc-300.jpg FC-300 300 X – X : 11 183 000
Y – Y : 1 664 100
2 521 000
files/img/kuvitus/flight-profile-fc-310.jpg FC-310 310 X – X : 19 917 118
Y – Y : 5 600 130
7 013 038

 

PATENTED FinnFlow

OPERATING PRINCIPLE

The intelligent FinnFlow® system takes advantage of natural water flow to create a reliable, energy-saving and low maintenance system. The system suits all tanks requiring surface scum removal. The requirement is that the FinnFlow® collector can be connected to a removal pipe or a channel for cleaned water in order to generate a flow.

The most common applications of the FinnFlow® system are preliminary and secondary sedimentation tanks in which scraper flights transfer the sludge close to the FinnFlow® collector. The FinnFlow® system collects surface scum to the collector by regulating the water levels. Since it uses a continuous flow, treated clean water comes along with the surface scum.

The system's intelligent technology directs surface scum to a smaller scum collection box located inside the collector, while transferring the treated water to a removal pipe for clean water via a pipe located at the bottom of the collector. Water movement is regulated at each stage at different water levels.

 

SOLAR-COVERS

PREVENT THE ODOR DISORDER

Finnchain Solar Covers are designed to prevent odors from the tank. For this reason, the roof modules are connected closely and if necessary, activated charcoal filters can be used for deaeration. At the same time this also prevents harmful gases from entering the environment.

FC-SOL-1500 cover

 

FC-SOL 1500 cover with solar panels

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RENEWABLE ENERGY

Finnchain’s Solar Covers also allow use of renewable energy, as cover modules can be equipped with solar panels.
The surface area of the tank can then be utilized for renewable energy utilization.

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Since covers prevent sunlight from entering the water, amount of algae is decreasing. Covers also prevent snow, rain or sand dust entering the tank.

 

Scraper innovations for circular tanks

 

CORROSION RESISTANT MATERIALS

 

 

 

CORROSION RESISTANCE AND ENERGY EFFICIENCY WITH SMART MATERIAL CHOICES

Products made of technical plastic and fibreglass are ideal for water and wastewater systems. The structure of Finnchain’s chain scraper system enables the use of these materials. Finnchain uses technical plastics and fibreglass as the main material in its system’s components. Steel parts are made of stainless steel or acid-proof steel, which prevents the formation of rust and thus the need for future rust removal.
 
LA scraper made of fibreglass is considerably lighter than a heavy steel platform, so moving a Finnchain scraper requires less energy. A 0.37 kW motor is enough for moving the Finnchain scraper.
 
The scraper consists of light parts which can be assembled during the installation of the tank, thus reducing installation and transport costs. The heaviest individual parts in the Finnchain scraper are the drive motor and gearbox, weighing approximately 100 kg. Due to the scraper’s light weight, installation does not require special cranes.

TEST TANK

OWN TEST TANK FOR PRODUCT DEVELOPMENT

Finnchain constantly develops its products. Product development requires frequent product testing, which is why we built our own test tank, 25 metres in diameter. During this extensive product development process, we have upgraded our scraper structurally and discovered the best possible raw material compositions for different components. We have upgraded almost all of our components during the process. Our greatest innovations include the patented conveyor chain and driving wheel systems, new idle wheels and tightening shafts, lighter surface sludge scraper, more efficient surface sludge removal, self-steering bottom scraper wheels and the use of two motors in large tanks.

 

PATENTED CONIC PIN

SPECIAL STRUCTURE PREVENTS CHAIN BENDING

Finnchain has developed a chain intended specifically for circular tanks. The specificity of the chain derives from a patented conic pin structure which decreases the stress directed towards the chain, reducing the bend by 50% when compared to a conventional conveyor chain. The conic pin was developed in collaboration with a university. 
 

PATENTED SURFACE SCUM REMOVAL

SURFACE SCUM REMOVAL

The scraper flight in the Finnchain system, moving at the surface of the tank, transfers the floating scum to the scum collection box on the side wall of the tank. The efficiency of the scum removal is based on scum gates located in the scum collection box. The scum gates open up when the scraper flight approaches the scum collection box, causing a water flow which enables the efficient collection of the scum. The water flow transfers the surface scum to a removal pipe for further treatment, and prevents freezing during winter. The opening of the scum gates can be adjusted, which enables more efficient removal of the surface scum.

 

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SATISFIED CUSTOMERS AROUND THE WORLD

 

We have delivered thousands of systems already to nearly 60 different countries.