Customizable ASTM-Certified Water Wall Panels For Coal Boiler
Evaporation Section
What is a boiler membrane wall?
It's a welded panel construction where tubes are joined by steel
membranes to form gas-tight furnace walls.
Introduction
- A membrane water wall is an airtight structure created by combining
pipes and fins. This design forms a seamless barrier that plays a
crucial role in boiler operations.
- Reduced Air Leakage: Its airtight nature minimizes air leakage
inside the furnace, ensuring more efficient combustion and energy
use.
- Cost & Structural Benefits: By using pipe - laying walls, it
lessens the load on the steel structure, which in turn cuts down
the overall cost of the boiler.
- Flexible Design: It’s easy to incorporate a suspension structure,
which helps improve the thermal expansion system. This adaptability
makes it ideal for large - scale mechanized production, with a high
assembly rate.
- Faster Start - up & Shutdown: Thanks to its low heat storage
capacity, it can significantly shorten the start - up and shutdown
time of the boiler, saving both time and energy.
- Disadvantage: However, the manufacturing process of membrane water
walls is rather complex, requiring advanced techniques and careful
assembly.
- Applications: Given its features, membrane water walls are commonly
used in large - capacity, high - temperature, and high - pressure
boilers, where efficiency and durability are key.
Strong points of membrane water wall
(1) Ensure the sealing of furnace wall and reduce air leakage in
combustion chamber.
(2)The realization of full water cooling in combustion chamber is
beneficial to prevent coking under the condition of intensified
combustion.
(3)The cooling time of start-up and shutdown of boilers can be
shortened because of its small heat storage capacity, fast
temperature rise and fast cooling in combustion chamber.
(4)Pipe-laying furnace wall is suitable, which greatly reduces the
load of boiler frame and it is convenient for suspension and
lifting.
(5)Compared with the bare tube type, the heat absorption capacity
of the tube is improved.
(6)It improves the per-assembly degree of boiler components,
facilitates and reduces the installation workload
Various Boiler Water Wall Panel Can Be Fabricated besides the
membrane wall type:
- Membrane boiler water wall panel: spot welds many rolled finned tubes into a sealed combined heating
surface, which improves the airtightness of the furnace and reduces
air leakage.
- Studded water wall tubing: welds pins of 20 to 25 mm in length and 6 to 12 mm in diameter on
the water wall tube, and then applies a chrome ore refractory
plastic to reduce the water wall panel’s heat absorption, and
increase the temperature in the combustion zone. It is appropriate
for situations where it is difficult to set fire to the fuel, as
well as specific slag tapping furnaces.
- Plain tube boiler water wall panel: composed of a whole row of seamless steel pipes, the simplest
structure.
- Wall-attached boiler water wall tubing: embedded in the inner wall of the furnace wall, single-sided heat
absorption.
- Double-sided heated water wall panel: installed in the middle of the large boiler furnace, which is
divided into two parts that are independent of each other, and both
sides are heated.
