KHU multi rake screenwith robust design for heavy-duty applications

KHU multi rake screenwith robust design for heavy-duty applications

KUHN KHU multi rake screenMechanical preliminary purification of sewage plants always makesenormous demands on people, technology and quality. Special

application cases necessitate reliable solutions underpractical conditions for the deepest flume / highest

discharge heights, particularly where largethroughput volumes or extremely wide

flumes are involved. Conventionalsystems soon reach their efficiency

or technical limits whenconfronted by theserequirement profiles.

The KUHN KHU multi rakescreen was developed bypractitioners for practitioners

and covers these requirements inan ideal manner.

ApplicationThe stable and robust design principle

makes the KUHN KHU multi rake screen ideallysuitable for the most difficult applications. These include

plants characterised by high volumes of disturbance material (stones,sand, etc.). Manifold oversizing of stress-related elements ensures

that components and the entire system enjoy a long service life.

Design and functionThe KUHN KHU multi rake screen mainly consists of amodular system frame, two heavy-duty driving chainswith chain sprockets on the drive shaft and the lower

deflecting station. Segmented rakes fixed to the chainswith a substantial penetration depth ensure reliable

cleaning of the screen grid. The fully-automatic scraperensures that the rakes are cleaned, dispensing with the need for

additional brushes or rinsing water. The drive is also equipped withoverload protection.

The entire machine can be integrated in an existing inlet flumewithout difficulty. Additional recesses are not necessary for thispurpose. Retrofitting in existing plants can be easily realised at anytime.

Solid matter is held back by the screen grid which consists of rodprofiles in a parallel configuration optimised to suit the flow. The

rakes fixed to the heavy-duty driving chains engage in the screengrid, clearing it of screenings. Defined penetration of the cleaning

elements thus ensures maximum operating reliability. Thepenetration depth of the clearing bars is designed to prevent screengrid blockage.

The cleaning elements transport separated screenings to the scraper.Here the rakes undergo fully-automatic cleaning by the scraper. Thisprevents debris falling back into the screen channel. The screeningsare dropped into downstream installations or containers via a large-volume discharge hopper.

The number of rakes can be individually adapted to suit anyapplication or transportation task. If required further rakes can beretrofitted without difficulty. This enables further acceleration of thepurification speed specially required for flushing flows during rainyweather.

Overload protection ensures that the working cycle is interrupted at adefined rake overloading level.

Design (Technical features)The superior design of our KUHN KHU multi rake screen ensuresoptimum ecological and economical operation and secures yourinvestment in the long-term. The KHU includes the followingadvantages:

• Designed for the largest conveying levels and flume widths

• Maximum separation capacity

• Retrofitting of additional rakes for flushing and rain weather flows possible

• Optional: two different purification speeds

• Enormous purification speed of screen surfaces

• Segmented rakes can be easily replaced

• Stable screen frame made of folded profiles with optimised strength characteristics

• Fully-automatic scraper

- no brushes

- no washing water consumption

• Guided penetration of rakes

• Overload protection protects the machine against damages

• Simple retrofitting in existing plants

• Simple maintenance

• No attachments necessary at the channel floor

Designed for the largest conveying levels and flume widths • Maximum separation capacity • Retrofitting ofadditional rakes for flushing and rain weather flows possible • Enormous purification speed of screen surfaces

Segmented rakes can be easily replaced • Fully-automatic scraper

KUHN GMBH · Franz-Kuhn-Straße 1-3 · 74746 Höpfingen, Germany · phone: +49 (0) 62 83 / 22 01-0 · fax: +49 (0) 62 83 / 22 01-88 · info@kuhn-gmbh.de R03/1

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KHU multi rake screenwith robust design for heavy-duty applications

Eco-bearing mount

Continuous lubrication reliable and maintenance-free

Scraper, fully-automatic

Optimum cleaning of the rakes and transfer to the discharge hopper

Hygienic covers, removable

Guarantee complete odour and hygienic encapsulation

Window opening (optional)

Heavy-duty driving chains

Available in stainless steel or composite material

Screen grid, selectable bar-spacing

Freely-selectable gap width for every application

Large-volume discharge hopper

Simple and safe transfer of screenings

Drive with overload protection

Optimum design for every application case

Service hatch

System frame, stainless steel

Optimum adaptation to every screen flume

Rod profiles, optimised flow characteristics

For maximum throughput capacity

Rake, segmented, hardened

- High penetration depth enables clog-free and optimum purification results

Dimensions

Standard materials

DriveFlume width up to max. 3 mFlume depth up to max. 15 mGap width 10-70 mm

Machine frame, covers AISI 304 stainless steelRod profiles AISI 304 stainless steelChain hardened stainless steelOther materials on request

Index of protection IP55 (explosion protection possible)Motor Bevel gear motor