Automatic Pressure Filters C Series LAROX PF · PDF file · 2011-12-15design features improved corrosion prevention, bigger unit ... Larox C1.6 Pressure Filter equipped with 40, 45

LARO

X PF

Automatic Pressure Filters C Series

FILTRATION SOLUTIONS

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Our Mission

Our mission is solid/liquid separation; we add stakeholder value by making our customers´ processes more competitive.

Our Vision

Larox as the world process industry´s solid/liquid separation solution provider.

Our Values

People to people – Sisu – Progress

Together... we make it happen... one step ahead for the benefi t of our customers.

Index

4 Operating Principles

6 Benefi ts

8 Applications

9 Larox C1.6 Series

10 Larox C15 Series

11 Larox C48 Series

12 Options, Ancillaries, Engineered Packages

13 Testing

14 Larox Service

15 Larox Commitment


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4

Operating Principles

The Larox C Series fi lter is the latest version of the well-proven Larox automatic pressure fi lter (horizontal plate type) with over 900 installations worldwide.

It off ers the ability to dewater and wash fi ne and diffi cult to dewater solids in high volumes, producing very high purity, dry fi lter cakes all in a fully automatic mode. Continuing a history of continuous product development, the latest design features improved corrosion prevention, bigger unit sizes and the option to utilize PP plate technology.

Product Description

The heart of the Larox automatic pressure fi lter is horizontally confi gured, recessed plate membrane chambers. A unique fi lter plate and diaphragm design enables a very wide variety of materials to be eff ectively processed and produce the optimum result.

Filtration

The fi ltration cycle starts by pumping slurry into all the fi ltration chambers simultaneously. The fi lter cake is formed as fi ltrate is displaced from the chamber by more slurry being pumped in. As the solids build the pumping pressure is increased, forcing more fi ltrate through the cake and fi lter cloth until the desired cake thickness has been achieved. The solids fi ltration process, together with the tightly woven fi lter cloths, ensures exceptionally clear fi ltrates.

Diaphragm Pressing (pre-squeeze)

After the fi lter cake is formed the diaphragm located at the top of each chamber is automatically infl ated, thus reducing the chamber volume and squeezing the solids to remove more fi ltrate. The high pressure maximizes fi ltration effi ciency. By pressing with the diaphragm, the cake is squeezed into a uniform thickness producing a homogeneous cake, which enhances the subsequent cake washing and air blowing steps.

Slurry

Filter cloth

Filtrate

Wash filtrate

Pressing medium

Wash liquid

Air

Solids

OVER 900 INSTALLATIONS WORLDWIDE, PROVEN IN OVER 30 YEARS INTO A WIDE RANGE OF APPLICATIONS.


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Cake Washing

The dewatered solids in-situ maximize solute recovery and/or solids purity. The wash liquid is distributed evenly across the fi lter cake due to the homogeneous cake surface produced by the squeezing step combined with the horizontal confi guration of the fi lter plate. All washes are by displacement, thus off ering the most eff ective possible wash results. Multiple wash steps and liquids are possible depending on the process and the desired result.

Diaphragm Pressing (post-squeeze)

After addition of the wash liquid the diaphragm is re-infl ated, forcing the wash liquid uniformly through the fi lter cake. This produces a washing effi ciency of over 95 % while producing consistent dry solids quality and ensuring the use of the minimum possible wash volume. The wash and pressing steps can be repeated as needed.

Air Blowing

Compressed air is blown through the fi lter cake for the fi nal dewatering of the cake. This ensures a discharged cake of consistent moisture at the lowest possible level exiting the fi lter, as it can be controlled precisely by adjusting the pressure and duration.

Cake Discharge and Cloth Washing

Finally the fi lter cakes are discharged from the fi lter by opening the fi lter plate pack followed by advancing the fi lter cloth. This conveys the cakes from the fi lter chambers. Cake discharge is always from two sides of the fi lter.

Discharge knives on the roller at the end of each chamber ensure residue-free discharge.

During the cake discharge cycle the fi lter cloth is continuously washed on both sides with high-pressure wash liquid to minimize cloth blinding and ensure consistent fi ltration results and a longer cloth life.


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Benefi ts

Reduced lifetime production costsEnergy consumption – electrical • power, fuel for subsequent dryingWash water consumption• Wastewater treatment costs •

Improved product quality, consistency and value

Larox-developed fully automated • process control with continuous optimizationUniform and highest possible • quality washing

Improved safety, health and environmental performance

Much less wastewater with much • lower solids contentReduced cake moisture means • less thermal drying, reducing atmospheric emissions

Increased yields and productivityRuns 24 hours per day, without the • need for regular cloth changingBacked by the Larox Service • network and its “Performance for Life” programVery little loss of solids in fi ltrate, • and less fi ltrate due to much lower consumption of wash water Lower moisture in cakes means a • potentially signifi cant increase in dryer capacity

Superior Performance

Can handle diffi cult and slow • fi ltering materialsInfl atable diaphragms with up to 16 • bar pressure ensure that maximum separation force is applied to the cake solids, resulting in maximum removal of the liquid phaseHomogeneous cake formation • is guaranteed by the diaphragm squeezing actionOptimal cake washing due to • homogeneous cakes and the fl at fi lter plate confi gurationExceptionally dry fi lter cakes • resulting in improved product quality and reduced downstream operating costsHigh unit capacity and vertical • construction reduce the footprint for installationFilter cloth is washed during every • discharge cycleVery consistent fi lter cake quality • with the lowest possible residual moistureLarox automation system ensures • consistent throughput and results, even with variable conditionsThe endless cloth ensures automatic • and complete cake dischargeSuperior processing while cutting • emissions to the lowest possible levelsEnergy effi cient operation•


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Easy Operation

Fully automatic, attendance free • operation, 24/7Guaranteed, highly effi cient cake • discharge within secondsContinuous cloth washing after • each cycle ensures optimum performance at all timesEnergy effi cient operation• Low per kilo operating cost• Quick and simple fi lter cloth change• Enclosures ensure safe operation • while allowing easy access during maintenance

Handles Diffi cult Materials

The Larox C Series automatic pressure fi lter is ideally suited for more diffi cult to fi lter materials where fi lter cakes have to be effi ciently washed.

A full range of chamber depths and plate sizes allows maximum fl exibility to confi gure the optimal unit for effi ciently handling almost any product. Low chamber depths together with the big plate sizes enable a larger fi ltration area per fi lter unit for slower fi ltering products.

Flat Diaphragm Design

The Larox fl at diaphragm design, which is available for all plate sizes, ensures the optimum diaphragm lifetime and off ers a number of advantages:

More and higher grade rubber • selectionsWear resistant materials• Longer lifetime• Easy and fast exchange•

Corrosion Resistant Operation

New PP-plate technology for • processing an even wider range of corrosive slurriesA wide selection of materials • ensures a suitable execution for all wetted parts, stainless steel construction is standard, but higher grades steels including duplex steel SAF2205 and 1.4462 are also available for more diffi cult environments

Cake Discharge

The endless fi lter cloth guarantees the quick discharge of all the cakes as it advances during the discharge cycle. At the same time, the integrated cloth washing device cleans both sides of the fi lter cloth with high-pressure water, thus preventing the cloth from blinding and ensuring consistent fi ltration conditions for the next cycle.


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Applications

The excellent washing results and extremely dry fi lter cakes obtained using the C Series fi lter have convinced many customers to select Larox automated pressure fi lters for their process.The applications in which Larox C Series fi lters are used include:

Bio-processing Biomass• Bio-pharmaceuticals• Enzymes• Fermentation broth•

ChemicalsAcrylonitrile• Catalysts• Di- and tri- calcium phosphate• Fungicides, herbicides & pesticides• Gypsum• Lignin• Magnesium hydroxide• Metal salts• Metal stearates• Optical brighteners• Phosphate salts• Phosphoric acid• Pigments and dyestuff s• Polymers• Toner (chemically produced)• Zeolites•

Foodstuff sBeet sugar• Microcrystalline cellulose• Starches (all types)• Sorbitol• Xylose•

Industrial mineralsAlumina• Boric acid• Ground calcium carbonate• Precipitated calcium carbonate• Silica and silicates• Talc• Titanium dioxide •

PharmaceuticalsAntibiotics• Intermediates• Proteins• Vitamins•

Waste processesGreen liquor dregs • (Kraft pulp process)Lime mud (Kraft pulp process)• PVC waste• Soda ash waste• Sulfur (Sufurox, Lo-cat etc.)• Waste mud•


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The Larox C1.6 Series comes with the smallest size plate in the C Series. The range starts with a single plate with an area of 1.575 m2 and goes up to a maximum of 12 plates. The C1.6 Series comes in two frame sizes and is expandable within each frame one plate at a time. It is an extremely compact unit ideally suited for small duties. Larox C1.6 Series units are normally delivered as one-piece, fully assembled units requiring minimal on-site work.

Larox C1.6 Series

Larox C1.6 Series 1.6* 3.2* 4.7* 6.3 7.9* 9.5* 11* 12.6

Filtration area m2 1.6 3.2 4.7 6.3 7.9 9.5 11 12.6

Frame size 1 2

Maximum pressure bar 16

Weight without auxiliary equipment t 10.5 11 11.5 12 12.5 13 13.5 14

Eff ective fi lter volumeChamber volume (40 mm PP) m3 0.063 0.126 0.189 0.252 0.315 0.378 0.441 0.504

Chamber volume (45 mm) m3 0.071 0.142 0.213 0.284 0.354 0.425 0.496 0.567

Chamber volume (60 mm) m3 0.095 0.189 0.284 0.378 0.473 0.567 0.66 n/a

Filter plates pcs 1 2 3 4 5 6 7 8

DimensionsHeight with 40 or 45 mm chamber mm 2 300 2 300 2 400 2 400 2 500 2 600 2 700 2 800

Height with 60 mm chamber mm 2 300 2 300 2 400 2 500 2 600 2 700 2 900 n/a

Length mm 3 650

Width mm 2 500

Filter plate size mm 900 x 1 750

Filter cloth: width m 1.05

length m 17 22 28 33

Larox C1.6 Pressure Filter equipped with 40, 45 or 60 mm chamber depth.

Filter Plates

These fi lters are available with stainless steel plates with 45 or 60 mm deep chambers or polypropylene plates with 40 mm deep chambers. The fi lter plates for the C1.6 Series are available in the following materials:

AISI 304L• AISI 316L• SAF2204• EN 1.4482• Polypropylene•

Cake compression diaphragms are available in:

Natural rubber• Butyl rubber• EPDM• Hypalon •

To ensure that the Larox C1.6 Series suits a wide range of operating conditions, all plates are fi tted with heavy-duty cloth rollers and bearings for long life and low maintenance.

The technical data is subject to change without notice. *Expandable


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The C15 Series is the intermediate size range with a fi lter plate area of 2.5 m2. In this case the smallest machine has 6 plates. There are 3 frame sizes, and within each frame they can be expanded in two plate increments. Accordingly, the smallest fi lter in this series has a fi ltration area of 15 m2 and the largest 50 m2.

These fi lters have been designed to minimize maintenance, and platforms provide easy access to all points of the fi lter.

Filter Plates

The fi lter plates for the C15 Series are available in the following materials:

AISI 304L• AISI 316L• SAF2204• EN 1.4482• Polypropylene•

Cake compression diaphragms are available in: Natural rubber• Butyl rubber• Hypalon •

To ensure that the Larox C15 Series suits a wide range of operating conditions, all plates are fi tted with heavy-duty cloth rollers and bearings for long life and low maintenance.

Larox C15 Series

Larox C15 Series 15* 20* 25 25* 30* 35 40* 45* 50

Filtration area m2 15 20 25 25 30 35 40 45 50

Frame size 1 2 3


Weight without auxiliary equipment t 28 29 30 32 33 34 38 39 40

Eff ective fi lter volume

Chamber volume (45) m3 0.675 0.900 1.125 1.125 1.350 1.575 1.800 2.075 2.250

Chamber volume (60) m3 0.900 1.200 1.500 1.500 1.800 2.100 2.400 2.700 3.000

Filter plates pcs 6 8 10 10 12 14 16 18 20

Dimensions

Height mm 400 4 600 5 950

Length mm 5 100

Width mm 3 900

Filter plate size mm 1 050 x 2 400


length m 29 35 41 42 49 54 61 67 74

Larox C15 Series Pressure Filter equipped with 33 or 45 mm chamber depth.



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Larox C48 SeriesThe C48 Series is the largest model with fi lter areas of up to 168 m2. It is the largest automatic pressure fi lter currently built. The C48 Series uses fi lter plates each with an area of 6.0 m2. In this case the smallest machine has 8 plates and there are 5 frame sizes, each of which can again be expanded in two plate increments. These fi lters have been specifi cally designed for easy maintenance and corrosion protection of all components.

Filter Plates

The fi lter plates for the C48 Series are available in:AISI 304L• AISI 316L• SAF2204• EN 1.4482• Polypropylene (only in old C60 design)•

Cake compression diaphragms are available in: Natural rubber• Butyl rubber• EPDM•

Larox C48 Series (33 or 45 mm) 48* 60* 72 84* 96 108* 120 132* 144 156* 168

Filtration area m2 48 60 72 84 96 108 120 132 144 156 168

Frame size 1 2 3 4 5


Weight without auxiliary equipment t 59 62 65 72 74 81 84 90 93 99 102 Eff ective fi lter volumeChamber volume (45) m3 2.16 2.7 3.24 3.78 4.32 4.86 5.4 5.94 6.48 7.02 7.56

Chamber volume (33) m3 1.63 2.04 2.45 2.86 3.26 3.67 4.08 4.45 4.90 5.30 5.71

Filter plates pcs 8 10 12 14 16 18 20 22 24 26 28

Larox C48 Series (60 mm) 48* 60 72* 84 84* 96 108* 120 132* 144

Filtration area m2 48 60 72 84 84 96 108 120 132 144

Frame size 1 2 3 4 5


Weight without auxiliary equipment t 59.5 62.5 73.5 84 85 95.5 106 116.5 128 138.5

Eff ective fi lter volumeChamber volume (60) m3 2.9 3.6 4.32 5.04 5.04 5.76 6.48 7.20 7.92 8.64

Filter plates pcs 8 10 12 14 14 16 18 20 22 24

Common dimensions (33. 45. 60)Height mm 5 170 5 860 6 340 6 920 7 610

Length mm 6 800

Width mm 5 040

Filter plate size mm 1 500 x 4 010


length (max.) m 55 65 75 85.5 95.5 106 116 126.5 136.5 148 158

Larox C48 Series Pressure Filter equipped with 33, 45 or 60 mm chamber depth.



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Larox C Series fi lters can be packaged with a number of options and ancillary devices to complete your optimum process solution.

cGMP packages

All C Series fi lters can be built to meet cGMP (current Good Manufacturing Practices) for food and pharmaceutical applications. Three documentation package levels are also available:

CDP (Compliance • Documentation Package)QDP (Qualifi cation• Documentation Package)EDP (Extended • Documentation Package)

Cloth Wash Supply Station

A cloth washing supply station complete with a high-pressure pump can be provided to eff ectively clean the fi lter cloth during the discharge cycle.

Hydraulic Power Pack

All Larox C Series fi lters are provided with a state-of-the-art hydraulic system for operating the piston rods that open and close the plate pack.

Instrumentation

Various levels of instrumentation can be provided depending on the requirements of the process, including conductivity meters to monitor the eff ectiveness of the fi lter cake washing.

Pressing Water Station

A pressing water station complete with circulation pump, supply and return piping is provided with C1.6 and C15 Series fi lters for infl ating the membranes during the fi ltration cycle. For the C48 Series this is an optional extra.

Side Covers

Enclosures with doors are standard and protect the operator while allowing easy access during maintenance.

Slurry and Wash Water Pumps

When required a slurry feed pump complete with a variable frequency controller can be provided. Wash water pumps can also be supplied either as separate items or as the second function of the slurry pump.

Engineered Packages

Larox can off er a range of engineering packages to meet almost any level of detail that may be required. With over 1 500 installations and 40 years of experience, Larox off ers customers the optimal solution for their process needs.

Access Platforms

On C15 and C48 Series fi lters, access platforms are available as required.

Air Compressors

Larox can provide high and low pressure air compressors and all necessary ancillaries, including tanks, as required.

Automation

The Larox automation system automates, optimizes and visualizes the entire fi ltration process, allowing fi ltration plant operators to achieve better fi ltration performance and cost-effi cient operations with minimal intervention. Larox automation solutions include plant fl oor level automation for all fi lter types, as well as corporate-wide visualization, real-time reporting and product analysis availability to the fi lter plant. All Larox automation solutions share the same architecture with modular functions.

Cake Conveyors

Heavy-duty belt conveyors for collecting the cake under the discharge chutes can be provided for the C48 series.

Options, Ancillaries, Engineered Packages


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Testing

Testing can be conducted at the Larox Research Center but is normally done at the client’s facilities. The Research Center continuously updates the testing equipment to ensure accurate results. It also maintains the Larox Databank, a source of detailed information on over 10 000 fi ltration tests.

Bench Test Filters

Larox’s bench test pressure and vacuum fi lters are used for preliminary screening and when only a limited amount of slurry is available. These test fi lters are also available to clients who wish to perform their own tests on their slurry.

Laboratory Filters

Larox’s laboratory pressure and vacuum fi lters simulate the process at the client’s production site on a smaller scale. All process and cost benefi ts of the application are projected with reliable test results that can be used for fi lter sizing.

Pilot Filters

Larox test engineers work closely with the client’s personnel to conduct test fi ltration for full-scale process evaluations on site. Pilot units can be connected directly to the client’s fi ltration process. Larox has a range of pilot fi lters for pressure, polishing, vacuum, and vacuum belt fi ltration to meet all possible process requirements. Pilot testing typically takes place after laboratory scale testing.

Larox off ers a versatile range of test fi ltration services. After each test a detailed report is prepared, quantifying the technical and economic benefi ts of the Larox solution.

Laboratory test unit


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maintained through spare part services, service agreements and maintenance support. Filter performance can be further enhanced through process optimization and modernizations. Finally, Larox off ers refurbishment and relocation/resale services that maximize the value of the original fi ltration investment.

Larox’s mission is to work together with its customers on a day-to-day basis to achieve their system and process objectives for the

Larox off ers a comprehensive Performance for Life service concept for its fi ltration solutions. Larox’s customer-centered services begin with strategic lifecycle planning already at the investment phase. A nominated customer support engineer handles each project together with the project manager, providing a familiar and reliable point of contact for the customer throughout the entire lifetime of the fi ltration solution. Start-up and training services ensure optimal performance, while reliability is

Performance for Life

entire lifetime of the solution. To support customers in achieving competitiveness in their business, Larox helps them to maximize availability, minimize operating cost and optimize process results. The Performance for Life service concept developed by Larox has proven to be an optimized, cost-eff ective and high-quality approach that meets the individual needs of customers.

Larox provides its customers with an unrivalled combination of process expertise and service. Larox delivers complete fi ltration solutions, which exceed the customers’ expectations for product quality, safety, value and consistency. All this in energy saving and environmentally friendly way.


Larox is committed to helping you...

Reduce lifetime production costs• Improve product quality, value and consistency• Improve safety, health and environmental (SHE) performance• Improve product yield•


Larox CorporationP.O. Box 29FI-53101 LappeenrantaFinlandPhone +358 20 768 7200Fax +358 20 768 7277E-mail [email protected]

www.larox.com

Sertifi ed Quality System SFS, Certifi cate No 1398-05. Compiles with the requirements of standard SFS-EN ISO 9001 Copyright @ 2008 Larox Corporation. All rights reserved. Larox is a registered trademark of Larox Corporation.

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Documents

Automatic Pressure Filters C Series LAROX PF · PDF file · 2011-12-15design features improved corrosion prevention, bigger unit ... Larox C1.6 Pressure Filter equipped with 40, 45