L&E Paper Technology provides innovative solutions to help paper mills reduce their energy consumption and environmental impact. They offer optimized hood systems, drying technologies, and heat recovery solutions that can lower energy costs by up to 30%. L&E also helps clients through energy analysis, developing customized plans to improve efficiency through greater utilization of low-temperature waste heat. With over 75 years of experience, L&E works globally to design sustainable systems that provide quick returns on investment through energy savings and environmental benefits.

1. L&E Paper Technology
rethink
redesign
rebuild

2. »Climate protection is a major issue in industrial manufacturing today, and it demands sustain-
able concepts. We respond to this demand with our initiative ›rethink, redesign, rebuild‹. We ask
the critical questions and are constantly looking for new ways to save energy and materials, to
streamline production processes and offer new technologies – in short: to be truly innovative!
That is how we help our customers shape a successful future.«
Dr. Peter Engelmann
CEO
engelmann@l-e.de
L&E in brief
2 3
Head office: Bochum, Germany
Subsidiaries: Hering AG (Germany), L&E Shanghai (China), L&EAmerica (USA)
Products/Services: Planning, production and assembly of plants for a wide range of industrial applications
The L&E Group of Companies Industries: Automotive, chemicals, plastics, paper, packaging, wood processing, waste incineration
Employees: 316 employees, of which 75 are engineers in the development center in Bochum
Langbein & Engelbracht is a major engineer- Germany, collaborate with the best partners
ing and plant construction company with the world has to offer and inspire our custom-
a long and illustrious tradition. We have ers with our profound engineering know-how.
written German industrial history, and our We take on the special challenges of the
expertise as a maker of innovative production various markets with our product development
facilities has been in demand for more than expertise. Whether the market is booming,
75 years. As L&E Group we have an interna- technology leaps are being made, the econo-
tional orientation and are represented by my is in a crisis or resources are scarce, we
our subsidiaries in China and the USA. always have the right solution.
We manufacture at our site in Bochum in
Produkte

3. The L&E product range for paper technology
Our product range
I
Papermachinehoodandairsystem IIRejectandfibersludgedrying
I
4 a Hood system 5
b Heat recovery system VSteamandcondensatesystem
I
c Pocket ventilation a Process automation system
d Wire section exhaust system b Cascade system
e Hall ventilation system c Thermocompressor system
d Yankee system
e Steam blow box
IDryingtechnology
I
a a a TransAir-dryer
b ContacAir-dryer Energyanalysisservice
V
c AirTurn system
b d High-efficiency hood IAftersalesservice
V
d c d c a
a
a b
e
a–d
c

4. We combine years of experience with solutions for the future.
6 7
LE Paper Technology
We are the people company to turn to standing enterprise with a rich tradition and
when you want to save costs, energy and raw many years of experience in the paper
materials – for example, with our innovative industry, LE began basing its research and
concepts for the utilization of waste heat. development work on this fact very early on.
We improve the overall energy balance of your We offer our worldwide customers environ-
paper machine so efficiently, that return on mentally friendly, high-performance solutions
investments costs (ROI) is often just a few for both the innovative design of new plants
months. Our customers have told us that as well as the optimizing of existing paper
controlling and minimizing operating costs is mills and machines. We advise and deliver
a key to competing successfully. As a long- turnkey total solutions on all continents.
References
Delfort Group
MM Karton
Mondi Group Products
Sappi Fine Paper Europe Paper machines: Air ventilation and heat recovery
SCA Packaging Steam and condensate systems
Stora Enso Paper driers
Reject and sludge driers

5. We optimize our customers’ energy balance.
8 9
Pioneering process solutions
Environmental regulations for the paper productivity, quality and runability of our
industry are getting tougher and tougher, the customers’ production sites.
costs of raw materials and energy are rising,
and at the same time industrial companies With our many years of experience in the
are being called upon increasingly to work industry, we offer comprehensive and leading-
as efficiently and as environment-friendly as edge process solutions for entire ventilating
possible. LE supports this trend with its systems, steam and condensation systems,
innovative process solutions. We plan and and drying technology within the paper
optimize the energy consumption of new machine and reject sludge drying after
and existing machines, thus improving the waste paper pulping.
Energy savings achieved by LE process solutions
in %
Newsprint – 31%
Packaging paper – 31%
Writing/Printing paper – 31%
Thin printing paper – 31%
Tissue – 31%
Standard LE optimized

6. 10 11
Process solutions for saving energy The LE range of services Areas of potential for
improving the energy balance
Web
With the LE process solutions for saving energy, related to savings in primary energy costs, kick-in support
we can influence as much as 30 percent of the quickly and raise the efficiency of the production Hood Heat Optimizing energy consumption in the
technology recovery
energy costs arising in the paper-making process machine. The improved ventilation systems drying section
by analyzing and improving the existing equipment make it possible to create consistent production
Improved Improved
for the drying sections of paper, cardboard and conditions and drying profiles for the paper web, Hall ven- quality efficiency Steam An active and sustainable contribution to
tilation blow
tissue machines. LE delivers, assembles and often also improving the quality of the paper box environmental protection with integrated
services ventilating plants, steam and condensate produced, besides reducing energy costs. Customer heat recovery and noise protection systems
systems for a comprehensive and money-saving
energy concept. The resulting savings, mostly Paper Air ex- Active protection of the building structure
drying Improved More traction
runability production
Improved climatic conditions for the staff
Reject Steam and
drying condensate
systems Complete system solutions for building
Air-Turn
Possible energy savings in a paper factory new plants
in %
Expansion and/or modernizing existing
plants
Energy (heat) 24%
Reject 7%

7. Vapour Condensate Steam
Air/Water
0
Air/Air
12 13
Hood energy balance and heat recovery systems
Paper machine hood Heat recovery
Custom tailored to perfectly fit each paper Ratio of costs/exhaust-air dew point Effective air/air-heat recovery thanks to the
machine and each building virtually self-cleaning glass-pipe exchanger
The high dew point, designed for up to Glass pipe with long service life and ease of
64°C (147°F) of the waste air, enables cleaning
effective heat recovery
Optimized heat exchangers guarantee high
Low primary energy requirement through thermal efficiency
improvements in heat insulation designed
especially to save energy Air/Water heat-exchange for heating white
water and heating water
46 48 50 52 54 56 58 60 62 64
Low false-air levels, even at low airflow
Waste-air dew point
conditions Building heated using exhaust heat from the
Steam costs per year Electricity costs for exhaust and supply air paper machine

8. 14 15
Drying technology
The dryers are specially set up to dry paper, Internal and external arrangement of
board, leaf, fiber tissue and tissue papers. the heating and circulation units
Systematically further developed for new TransAir-Dryer with no-contact web
plants or perfectly adapted to the relevant guidance, especially for floating webs,
production conditions to improve quality coated on one or both sides
and efficiency of existing plants
ContacAir-Dryer with web guidance
Ecologically and economically engineered supported by guide rolls, especially for
paper and board, coated on one side
Patented CombiFoil blast pipes for short
heating times, minimal downtimes and AirTurn dryer with no-contact redirection
negligible losses of pressure and drying of paper, coated on one or
both sides
Specially designed blast pipes for a uniform
and high heat-transfer factor

9. Exhaust air
Exhaust Air
Filter
Filter
16 Reject
Reject
M
17
disposal
disposal
Reject
Reject
feeding
feed-in
Compactor
Compactor Reject Dryer
Reject dryer Fan Heat recovery Process air heating
Reject and fiber sludge drying
in recycle pulping operations Steam and condensate systems
Raise the dry content of rejects and sludge Final processing is done by pressing the now Steam and condensate systems tailored to the Cascade systems for an optimum heating
up to 90 percent dried material into bales or briquettes, or sim- needs of the individual customers enables and curve and pressure sequence when drying
ply through compaction resulting inconsider- ensures excellent product quality and high
Robust and highly reliable construction able further savings in disposal transport or throughput during the drying process. Thermocompressor systemsfor the individu-
increased uses for the dried sludge or rejects. alized control of each drying group
Short payback periods (often less than The construction and mode of operation of Efficient use of the entire steam-energy
1 year) the LE Reject and Sludge drying system ena- Yankee systems with thermo-compressor
bles payback periods of less than one Applicable for all paper weights and grades for reducing the primary energy consump-
Active and sustainable environmental year to be attained. tion
benefit by: High operating reliability and runability
– Using the waste heat from the paper The resource-saving use of waste heat and make short payback periods possible
production process (no primary heating reduction of landfill disposal also have a posi-
required) tive effect on the environmental image and Minimal service required
– Reduced disposal transport costs by improve public acceptance to the paper mill
removing water from the waste rejects owner as a 21st century “green technology”
and sludge (tons of water removed per user.
hour)
– Raising the heat value for now dry rejects
and sludge by removing the water
making the dried material a viable fuel
source
The drying is done at low temperatures. This
enables waste heat from the production proc-
ess, boiler flue gases, gasturbines, etc. to be
used intelligently and effectively. The simple
and dependable construction combined with
waste-heat recovery drying keeps operating
costs to a minimum.

10. With our many years of international experience in the paper industry, we are
ready to further design and implement your heat and energy concepts with a
wide range of innovative solutions.
18 19
Energy analysis service
LE is a partner to the paper industry, in Technological progress makes the use of low- The first step in optimizing the energy bal- Primary/Initialassessment » Examine the
developing and executing energy saving proc- temperature waste heat an important factor ance is assessing the existing situation. entire ventilation plant, air volumes with
esses to continuously and sustainably improve when optimizing energy consumption. For an This is the basis for the analysis of the heat regard to the hood and hall climate, heating
resource efficiency, taking into account all efficient use of energy through the extended and energy usage within the paper factory operation, cylinder temperatures, etc. and
applicable statutory and regional regulations. use of low-temperature waste heat, we put and the potential improvements that result assessment for the extended use of all the
We make sure that the energy lost through together a step-by-step concept together with from it. low-temperature heat.
waste air and water in the paper factory is the paper factory. The goal is to improve the
made use of efficiently. level of efficiency by finding economical and Analysis » Analyze and assess the energy
realistic uses for this waste heat in the plant., efficiency and the production and quality
We assist the customer from the analysis requirements
design phase all the way to implementation
of those concepts into the paper mill systems. Actionplan » Develop a detailed action plan
The LE energy analysis Environment-friendly process solutions
Implementation » Implement the actions
LEprocess solutions Customer goals using LE solutions
Waste water
Exhaust air
Primary/Initial assessment Improved efficiency
Analysis Increased productivity
Action plan Improved quality
Raw materials Paper mill Paper
Implementation Improved runability
Energy

11. rethink
redesign
rebuild
Germany China USA
www.l-e.de Langbein Engelbracht GmbH Langbein Engelbracht L E America
info@l-e.de Hattinger Straße 951 Industrial Engineering and Environmental Technologies LLC
44879 Bochum, Germany Supply Shanghai Ltd. 2300 Northridge Drive
3652 Cao’an Rd, Jiading District, Kaukauna, WI 54130, USA
201812 Shanghai, China
Phone +49 234 4173-0 Phone +86-21-3911 5191 Phone +1 920 462 0319
Fax +49 234 4173-100 Fax +86-21-3911 5192 Fax +1 920 766 4600