systems for the thickening and dewatering of sludges - Flowtec ...

SYSTEMS FOR THE THICKENING AND DEWATERING
OF SLUDGES

BELLMER KUFFERATH Machinery develops and sells plant and equipment for the dewatering, thickening and
sorting of solids. The different AKUPRESS® product lines, part of which are patented, have made BELLMER
KUFFERATH Machinery a leading manufacturer of screw presses suitable for dewatering structured, fi brous
materials and sludges.
DEWATERING AND THICKENING OF SLUDGES
Further development and downstream
dewatering of slugdes represent a
fundamental process both from an
economical and ecological viewpoint,
especially even in the pulp and paper
industry dealing with large quantities of
sludge.
The principal objectives of downstream
sludge dewatering may be:
- Reduction of volume and weight to
minimize transport and landfill
charges
- Highest possible dry content and
thus higher upper heating value to
achieve constant and ecological
incineration
With the AKUPRESS® BX-H and BX-M
screw press lines BELLMER KUFFERATH
Machinery offers a range of products
able to dewater structured sludges, i.e.
sludges with sufficient shear resistance,
to optimum dry contents.
For low inlet consistencies the AKSE® S
disc thickener is used as pre-thickening
unit.
AKUPRESS® BX-M/BX-H SCREW PRESSES
AKUPRESS® BX-H and BX-M screw presses
dewater structured sludges from a dry
content of 6-16% to 40-70% and meet
the requirements on sludge dewatering
at best.
- Highest and adjustable dry contents
(AKUPRESS® BX-H)
- High and adjustable dry contents
(AKUPRESS® BX-M)
AKSE® S DISC THICKENER
AKSE® S disc thickeners dewater sludges
from a dry content of 0.5-6% to 8-16%.
AKSE® S can be used as individual units
or particularly as pre-thickener, e.g.
upstream of screw presses. In this case
they assure both the operation and the
economic efficiency of the screw press at
low solids contents in the inlet.
FLOCCULATION, FLOCCULATION REACTOR
Sludges are basically dewatered by adding
flucculants.
BELLMER KUFFERATH Machinery supplies
a specially designed flocculation reactor
for optimal addition of the flocculant.

Spray water
Flocculant from
polymer preparation
system
Diluting water
Sludge supply
Storage
tank
LIC
LI
FC
M
FC
M
SIC
Flocculation
reactor
FC
FI
M
LIC
LI
AKSE® S
FC M
Discharge Cleaning of
discharge
LI
Press water
AKUPRESS® BX
GI
Clarified water/Filtrate
SCOPE OF SUPPLY
HYDRAULIC
AGGREGATE
M
M
M
FC
EIC
In addition to the optimised individual
components, e.g. post-dewatering after
belt-presses, we are able to supply a
comprehensive range of machinery
and equipment that includes complete
turnkey systems together with all relevant
process control technology conveying
systems and catwalks.
The process control technology can either
be supplied with an own visualisation
and operation surface (WinCC) or rather
be linked with central process control
systems via bus lines.
EI
LIC

AKUPRESS® BX-H
AKUPRESS® BX-H is a screw press designed to dewater sludges to dry contentsbetween
50-70%. Both design and function are based upon the patented and
well-tried concept of the AKUPRESS® X line.
The essential distinguishing characteristic about this press type is fact that the length
of the pressing zone can be adapted to the properties of the sludge to be dewatered.
The throttling action takes place at the press outlet between the spiral-free area of
the screw and the screen basket.
The torque of the screw is controlled and adapted by changing the pressing zone
length during operation.
On the one hand, this conceptual design allows to reach extremely highest torques
and thus also high dry contents. On the other hand, the torque can be controlled,
with the dry content being set in a narrow defined range.
AKUPRESS® BX-M
While the conceptual design draws upon the AKUPRESS BX-H line in many parts,
the torque has espacially been adapted to the minor demands in terms of dryness,
resulting hence in a low-cost solution. The patented torque control system has been
adapted from the AKUPRESS BX-H.
Both AKUPRESS® BX-H and BX-M are offered each in five sizes with screw diameters
ranging from 250 to 1,400 mm. They are available as short or long version in order
to cope with the entire spectrum of dewatering and dry contents at the press inlet.
Both AKUPRESS® BX-H and BX-M stand out due to their simple maintenance requirements,
e.g. thanks to their proven and tested interchangeable screen basket system
or the flange journals, the screw shaft can easily be changed without opening the
bearings.

SLUDGE DEWATERING SYSTEMS
In addition to the optimised individual components we are able to supply a
comprehensive range of machinery and equipment that includes complete turnkey
systems together with all relevant process control technology, conveying systems
and catwalks.
The process control technology can either be supplied with an own visualisation
and operation surface (WinCC) or rather be linked with central process control
systems via bus lines.
The standard conveying systems used are spiral-free screw conveyors with the
following benefits:
- Closed construction, absolutely free from dirt
- Even great lengths without additional bearings
- Vertical conveying possible
Apart from the supply of these systems special engineering services, including
sludge analyses, pilot plant trials, installation plans,flow and control schemes
and a complete technical documentation, are provided.
FR FLOCCULATION REACTOR
The FR flocculation reactor is a recipient with flow direction from bottom
to top that is equipped with a specially designed agitator.
Its essential features are:
- High turbulence at the point where the flocculant is added, then
decreasing turbulence and formation of flocks
- Open top to examine and optimise the flocks
- Homogeneous distribution on sundry processes
The flocculation reactor is available in five sizes ranging from 10 to 400 m 3 /h.
AKSE® S
CONSTRUCTION AND FUNCTION
The sludge to be thickened is directed into the gap formed by two mesh
covered discs. These two discs form a pair and are fixed on a central shaft
rotating concentrically in a vat. The sludge drains through the mesh and
the thickened material is conveyed by the rotation of the discs to the side
opposite the inlet, here the thickened stock is thrown out and removed via
a discharge chute.
AKSE® S can be supplied with discs of 1.75 m or 3.00 m diameter, with the
shaft allowing to carry up to 10 pairs of discs per unit. Small units having a
filter surface of 4 m 2 and also large-scale thickeners of 220 m 2 filter surface
are based upon the same operating principle.
AKSE® S features easy handling, control and maintenance.

ABOUT BELLMER KUFFERATH
MACHINERY
BELLMER KUFFERATH Machinery is
a member of BELLMER Group and
develops, produces and sells plant and
equipment for dewatering, thickening
and sorting from its Düren site, Germany.
In order to be able to always provide
the best possible solution the products
by BELLMER Separation Technology
complement the BELLMER KUFFERATH
product range most perfectly.
PRODUCTS
DEWATERING – FILTRATION
AKSE® F, S
Disc thickeners
AKUPRESS® A, AS, AM, AX, AL
Screw presses for dewatering
coarse matters
AKUPRESS® BX
Screw presses for dewatering
structured sludges
AKUPRESS® CX
Screw presses for dewatering
fibrous materials
SERVICES
PROJECT ENGINEERING
Our project engineering services cover
everything from flow and control
schemes, installation plans, feasibility
studies to the integration of plants into
the existing facilities and systems.
SCOPE OF SUPPLY
In addition to optimised individual
components, e.g. for plant engineering,
we are able to supply a comprehensive
range of machinery and equipment
including turnkey systems together with
all relevant process control technology.
AFTER-SALES-SERVICE
- Machine/plant commissioning and
staff training performed by our own
experienced Application Engineers
- Complete on-site assembly and
installation with own staff or on-site
supervision of assembly and installation
- Maintenance, upkeep and repair works
by our own team of highly qualified
professionals
- Stockkeeping and fast delivery of
important spare and wear parts
BELLMER KUFFERATH Machinery GmbH · Andreas-Kufferath-Platz 5 · 52353 Düren-Mariaweiler/Germany · Phone +49/24 21/12 18 4-0 · Fax +49/24 21/12 18 4-99
info@bellmer-kufferath.de · www.bellmer-kufferath.de
www.Drei-K.de