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 · [email protected] R03/1
4
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