LTG Filtration Technology
For clean air.
For recovering valuable materials.
APPLICATION SOLUTIONS
Successful applications in many industries
Textile technology / technical textiles Building and insulation materials
Nonwoven Medical technology
The individual components of LTG filter technology ensure clean air in the production premises of many different industries.
They catch, transport, filter, compact and separate fibres, dusts and other particles.
This way, they help increase product quality, lower production costs, recover raw materials, keep employees healthy and
ensure compliance with environmental protection standards.
Applications
ppm
Compacting Separating Recycling Continuous Emission Explosion Quality
reducing protected
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OUR EXTENSIVE PRODUCT RANGE
Series Air volume Material Specification
through-put
Coarse filters up to 135 000 m³/h 20–130 kg/h continuous cleaning
TV. up to 80 000 cfm 45-290 lbs/h Process-specific filter design
(mesh sizes 50–10 000 μm/0.002–0.4 in)
200 °C / 390 °F version optional
(Pre-) filtration of coarser particles
Fine filters up to 270 000 m³/h up to 250 kg/h continuous cleaning
CDF / TF. up to 160 000 cfm up to 550 lbs/h Process-specific filter design
170 °C / 340 °F version optional
all drive elements are located on the
clean air side
Fractional efficiency (when new) up to
d50,0 [µm] = 0.8 (with ISO 12103 A2 test dust)
Fibre compactors up to 10 000 m³/h up to 500 kg/h perforated sheet metal cone with auger
FK. up to 6 000 cfm up to 1100 lbs/h and tangential air inlet
pressureless material discharge
150 °C / 300 °F version optional
Cyclone / up to 5 500 m³/h up to 100 kg/h material discharge at pressure differential
Centrifugal separators up to 3 000 cfm up to 220 lbs/h up to 5 000 Pa / 20 in H 2 O
ZS.
Dust compactors up to 100 kg/h material discharge at pressure differential
CPS up to 220 lbs/h up to 5 000 Pa / 20 in H 2 O
dust-free material discharge by compacting
rate of approx. 2–3
Customer-specific
solutions on request.
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LTG FILTRATION TECHNOLOGY
Functionality of Filtration Technology:
Customised filter solutions for S
hi
clean processes and healthy
working conditions Main airflow with
fibres and dust
The systems made from LTG filter components have a modular design and
are continuously self-cleaning. They efficiently filter and separate solids such
as particles, dust, fibres, chips and granulates from the production process,
thus recovering valuable materials or disposing of waste that can no longer
be used.
The various filter stages
LTG filters mechanically separate solid particles from waste air in machinery
and factory buildings. The filtration takes place in several steps depending on
particle size and required air purity. There are three basic steps:
Coarse filtration (also called pre-filtration),
Fine filtration and
Micro-filtration of particles.
Coarse filtration
A continuously self-cleaning prefilter separates fibres and coarse particles
using a filter media. The vacuumed off coarse particles are taken to a separator
with a conveying fan.
Fine filtration Prefilter
A continuously self-cleaning fine filter separates any dust still remaining in
the airstream almost completely. The airflow through the filter drums is from
the inside to the outside. The dust collected on the filter media, is continuously
vacuumed off by rotating nozzles and passed to a cyclone separator.
All drive elements are located on the clean air side.
The filter surface is adapted to the requirements by changing the number of
filter drums.
Secondary airflow 1 and 2
The cleaning of both prefilter and fine filter is done by suction nozzles.The
necessary pressure and volume flow is generated by fans. Fibres and dust are Secondary airflow 1
Separation/compacting
discharged without pressure from the respective secondary circuit. The fibre of coarse particles in the
compactor and the cyclone, if required with an additional compacting power fibre compactor
screw, are used for this.
Valuable materials
The materials recovered can be returned to the production process.
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Clean air
Secondary airflow 1 with
Secondary airflow 2 with high fibre concentration
igh dust concentration
Separation and
compacting of coarse
particles in the fibre
compactor
Fan
main airflow
Separation of fine
particles in the cyclone
Fine dust is extracted and
conveyed to the cyclone
Fine filter
Advantages
Process temperatures up to
200 °C / 390 °F
Customer-specific solutions
High filtration output
Recovery of valuable materials
Continuous operation
Energy-efficient
Secondary airflow 2 Pressure surge-free
Separation/compacting Low maintenance
of fine particles in the
cyclone Modular and space-saving structure
Low operating costs
Direct installation at the production
Valuable materials
process is possible
High performance density
Long service life of filter media
Explosion-proof models available
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LTG Engineering Services
LABORATORY TEST / EXPERIMENT FIELD MEASUREMENT / OPTIMISATION
Secure air handling plans in advance. Use the We review and optimise your ventilation concept
full the potential of existing systems. or your production process right on site.
Optimisation of thermal comfort Optimisation of thermal comfort
Precise imitation (mock-up) Optimisation of existing air conditioning
Visualisation of flows facilities
Optimisation of acoustics Energetic optimisation
Determination of the required threshold speeds for Review and calibration of airstream simulators
transport and thermal processes Determination of boundary parameters such
Measurement of flow profiles as speed, pressure, temperature, humidity or
Measurement of customer-specific special fans geometries
Project-specific product optimisations Visualisation of flows
Acoustic measurements
Duct work measurements
SIMULATION / EXPERTISE R&D / START-UP
No matter if you need an air conditioning concept Use the innovative power and inventive spirit
or a new production process: use state of the art of the LTG engineers for ideal results in your
simulation tools even in the planning stage. plant.
Computer-based flow simulation CFD Development of customer-specific products
Finite-element method Individual prototype construction
Development of energy-efficient flow concepts System commissioning and plant service
Simulation of fibre treatment and sifter Assessment of new concepts before they are
processes implemented
Simulation of temperature adjustment Review of fans
processes
Wind simulation
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Filtration
Coarse filter TVM / TVN Fine filter CDF Drum filter TFB / TFC
The airstream carrying coarse The dusty air passes through A fixed filter drum routes the air
particles passes through a filter the filter drums from the inside flow from the inside out. Dust is
media. The mesh size can be so that the dust deposits on the extracted continually inside the
adjusted to the particle size. inner surface from where it is filter, reducing the space with
The filter media is cleaned with continuously removed by rotating a high dust load to a minimum.
continuous suction. suction nozzles. Continuous The drive elements are easily
cleaning provides a constant accessible on the clean gas side
pressure level in the system. All and protected from contamination.
drive elements are located on The modular build makes it
the clean air side and are thus possible to adjust the system to
protected from pollution. many different process conditions.
Separating and Compacting
Fibre compactor FK. Cyclone ZS. Dust compactor CPS
The airstream carrying coarse The airstream carrying fine The material previously
particles enters the unit at the top, particles enters the cyclone separated is picked up by a
then passes through a perforated (centrifugal separator) tangentially horizontal compacting screw and
sheet metal cone. The airborne at the top. The solids are carried discharged. An agitator ensures
solids accumulate on the inside of to the outside by the rotating an even feed to the screw and
the perforated sheet metal cone centrifugal airflow and pass prevents clogging. The material
and are continuously stripped spirally either to the collecting is compacted by a metal spring
off by an auger, pushed down, container or to the dust compactor diaphragm.
compacted and discharged at zero mounted underneath.
pressure at the bottom.
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Comfort Air Technology Process Air Technology Engineering Services
Air-Water Systems Fans Laboratory Test / Experiment
Air Diffusers Filtration Technology Field Measurement / Optimisation
Air Distribution Humidification Technology Simulation / Expertise
R&D / Start-up
LTG Aktiengesellschaft LTG Incorporated
Grenzstrasse 7 105 Corporate Drive, Suite E
70435 Stuttgart Spartanburg, SC 29303
Deutschland USA
Tel.: +49 (711) 8201-0 Tel.: +1 (864) 599-6340
Fax: +49 (711) 8201-720 Fax: +1 (864) 599-6344
E-Mail: info@LTG.de E-Mail: info@LTG-INC.net
www.LTG.de www.LTG-INC.net
451-06 [05/19] Technical changes reserved.
© LTG Aktiengesellschaft, Stuttgart
