Performance Values

1

• Performance Values

La Mont offers industrial boilers for steam, hot
water and thermal oil as per the following range
of operation. Range of operation until now
2

• Technical Principle

• The pressurised body is made of a stable
  retangularly arranged frame-work out of
  downcomers, headers and tube walls, which are
  welded together with the tube walls to a
  gas-tight tube cage.
• Due to the unique arrangement of mixture tubes
  (4), steam back-flow tubes (5), overflow tubes
  (6) and unheated downcomers and return tubes (2,
  7, 8) a pre-separation of steam before the steam
  drum can be achieved. This results to a excellent
  load change behaviour as well as a high steam
  purity.
• This tube cage is self-supported by downcomers in
  the corners of the boiler (2,7)

• drum
• corner tubes (unheated downcomers)
• header
• mixture tubes

• steam drain tubes
• overflow tubes
• corner tubes (unheated return tubes)
• unheated downcomers

3

• Technical Principle

• A heavy supporting frames where other boilers
  systems have to be hung in is unnecessary. Hence,
  complicated connections between boiler and cold
  frame do not exist.
• La Mont boilers are set up in the way that they
  can expand from the ground level to all
  directions.
• The compact tube system will be manufactured in
  the workshop under good conditions and sharp
  quality surveillance.
• La Mont boilers can be cut longitudinally or
  cross wise into several stable pieces for the
  transport.
• The pieces are fit together in the workshop,
  transported to the site and welded together with
  a few field welds and without expensive fitting
  works.

4

• Advantages

• Best possible flexibility
• Quick start-up
• Self-supporting construction
• Good fit to space requirements
• Water circulation.

5

• Best possible flexibility

The Eckrohr design for the particular application
can be chosen from a boiler type catalogue, which
includes various fuels and combustion systems.
All boiler design all specialities concerning the
fuel will be considered For biomass combustion
ERK offers a water-cooled inclined grate as a
self-contained combustion system.
6

• Quick start-up

• At start-up the water circulation starts very
  quickly because there are neither long overflow
  distances nor long distances from downcomer to
  heating surface on water side. Due to the short
  distances all water filled tubes reach saturation
  temperature very quickly at start-up. Dangerous
  material stress caused by different thermal
  expansion will not occur.
• There is no lower drum. It has not to take care
  of thermal stress in this drum. The lower drum
  can not get crooked during start-up.
• A low number of tubes are connected to the drum
  compared to other boiler types. The drum shell is
  only weakened to a low extent. At same strength
  the drum shell can be thinner than other boiler
  drums.
• The admissible temperature variation gradient is
  significantly higher leading to a quick start-up.
  The shell thickness is constant over the whole
  circumference. The deformation of the drum is
  less.

7

• Quick start-up

• The downcomers have a big diameter. Steam bubbles
  forming at pressure fluctuations and high load
  change velocities can not endanger the water
  circulation.
• Low pressure variations at load changes.
• Quick load variations are possible without
  significant changes of steam pressure.
• Also the water level in the drum keeps calm
  compared to other boiler designs.
• A low number of tubes are connected to the drum
  compared to other boiler types. The drum shell is
  only weakened to a low extent. At same strength
  the drum shell can be thinner than other boiler
  drums.

8

• Self-supporting construction

• The thermal expansion is from bottom to top. This
  is an advantage with grate firing because the
  thermal expansion difference between grate and
  boiler is minimised. The sealing between grate
  and boiler is easier.
• High steam purity.
• In the steam overflow system a pre-separation of
  water and steam takes place. The steam dryness is
  very high. High steam purity can be achieved also
  with poor feed water quality.

9

• Good fit to space requirements

• By the system of downcomers the heating surfaces
  are not only fed from the drum. The heating
  surfaces can be arranged in a distance from the
  drum. Large boilers as usual in refuse
  incineration plants can be simply made.
• Compact types were developed for several fuels.
  The required space is small and in a lot of cases
  the transport from workshop to erection site in
  one piece is possible.
• Eckrohr boilers can be fabricated in segments in
  the workshop. On site only little welding is
  necessary leading to short erection times and
  high quality.

10

• Water circulation

The water circulation in Eckrohr boilers has some
specific characteristics compared to other
natural circulation boilers. Also in Eckrohr
boilers riser tubes (4) are heated. The
water-steam mixture flows upwards through the
riser tubes. In contrast to other systems a
pre-separation of steam outside the drum takes
place. In the upper mixture tube (3) steam is
already separated from water and a part of the
water flows through unheated return tubes (1) to
the header (2). The separated steam flows through
the overflow tube (5) to the steam space of the
drum (6). The remaining mixture runs through
mixture tube (3) into the drum. The final
separation of water and steam takes place in the
drum, the water flows through the downcomers (7)
to the headers (2). Due to the return tubes (1)
the flow distance of water is shortened and the
water circulation is improved.
1 unheated return tubes 2 header 3 mixture
tubes 4 riser tubes (evaporator) 5 overflow
tubes 6 unheated steam drum 7 unheated
downcomers
11

• Fuels

• Eckrohr boilers can be fired with a broad range
  of fuels. On one hand traditional fuels like
  coal, wood, natural gas and oil are used. On the
  other hand the fuels range from industrial and
  municipal waste, paper and biomass to hazardous
  waste like chlorinated or sulphur containing
  hydrocarbons. Also fuel mixtures are in
  operation, e.g.
• coal packaging waste tobacco dust
• coal peat dust
• coal wood
• coal diesel engine exhaust gas
• coal fuel oil
• coal biogas
• wood natural gas
• Municipal Waste
• Rice Husk Bagasse

12

• Fuels

More than 490 Eckrohr boilers in waste
incineration plants emphasise the leading
position on that field.
13
Resistance Calculation

• Resistance calculation of pressure reservoirs
  after usual standards (AD/TRD/ASME/)

14

• Totally more than 20.000 technological reference
  by 54 licence partners

Number of References
oil gas coal waste waste
biomass heat
15

• Power range of the plants

Number of References
16
Boiler 1 10 t/h, 21bar, saturated steam
17
Boiler 2 10 t/h, 21bar, 230C superheated steam
temperature
18
Boiler 3 4 t/h, 13bar, 250C superheated steam
temperature
19
Boiler 4 10 t/h, 16bar, 290C superheated steam
temperature
20
Photographs of La Mont Boilers
21
Waste heat recovery boiler
22
Marine Auxiliary Boiler
23
La Mont waste heat recovery boiler
24
Engineering drawings of Eckrohr boilers
25
Steam Boilers
26
Steam Boilers
27
Eckrohr Waste Heat Boiler
28
Eckrohr Waste Heat Boiler
29
Eckrohr Waste Heat Boiler
30
Eckrohr Boiler for Gas Firing
31
Eckrohr Boiler for Coal Firing
32
Eckrohr Boiler for Coal Firing
33
Eckrohr Boiler for Waste Firing
34
Eckrohr Boiler for Waste Firing
35
Eckrohr Boiler for Waste Firing
36
Eckrohr Boiler for Oil Firing
37
Eckrohr Boiler for Oil Firing
38
Eckrohr Boiler for Oil Firing
39
Eckrohr Boiler for Coal and Peat Firing
40
Eckrohr Boiler for Oil and Gas Firing
41
Eckrohr Boiler for Oil and Gas Firing
42
Hot Water Boilers