Durable Boiler Water Wall Panels Customized Material To Replace
Plant Fiber Product Introduction
The water wall panel was originally designed not to be heated but
to cool the furnace against high temperatures.Later, because of its
good heat exchange function, it gradually replaced the drum as the
main heating part of the boiler.An evaporative heating surface
arranged on the inner wall of a boiler furnace and composed of many
parallel pipes.The function of the water wall is to absorb the
radiant heat of the high temperature flame or flue gas in the
furnace chamber, generate steam or hot water in the pipe, and
reduce the temperature of the furnace wall to protect the furnace
wall.In a large capacity boiler, the flame temperature in the
furnace is very high, and the intensity of heat radiation is very
large.40 to 50 percent or more of the heat in the boiler is
absorbed by the water wall.Except for a few small capacity boilers,
modern water tube boilers use water cooling wall as the main
evaporative heating surface.
Details
The combination characteristics of membrane water cooling wall are
as follows:
1. Check and adjust the width, length, flatness and diagonal of the
pipe row when the segmented pipe row is hoisted onto the
combination frame.If the width of the tube row is greater than or
less than the specified size, the fin can be cut to an appropriate
length, adjusted to the specified size and then re-welded.When the
diagonal difference of pipe row exceeds lOmm, fins between some
pipes with larger size can be cut to reduce the distance between
pipes to eliminate the diagonal difference, and then the fins can
be welded.When the unevenness of the pipe row exceeds the allowable
range, gantry frame can be used to correct the top pressure of the
jack.
2. The lower part of the front and rear water cooling wall has
furnace bottom (cold ash bucket), and the upper part of the rear
water cooling wall has flame Angle, so the size of the component is
larger and the shape is more special, so it is difficult to
combine.
3. The butt joint of pipe row is different from that of a single
pipe.The welding joint of a single pipe shrinks by about 1-2mm
after welding, which has no effect on other pipes.But the pipe row
is not the same, two sections of pipe row butt welding, if from one
side to the other side of the sequence of welding, welding to the
end of the pipe caused by the deformation is very large.Therefore,
before the butt welding, the butt clearance of this welding joint
should be comprehensively measured, and according to the butt
clearance is too small, moderate, too large classification, if the
butt clearance is too large or too small, must take the method of
cutting the pipe, replaced with a moderate short pipe.At this time,
due to the shrinkage of welding, the pipe with a larger gap will
become solderable. In order to reduce the shrinkage deformation of
pipe welding, the method of symmetry and cross welding should be
adopted.
4. The single pass ball of the rear water wall pipe is different
from other heating surface pipes.Because the rear water wall in the
upper header box has a flameproof Angle, the number of flameproof
Angle bending pipe is the same as that of the rear water wall, in
order to increase the rigidity of the flameproof Angle, there is
also a considerable number of spacing straight pipe (most furnace
type).At the intersection of flame Angle and straight pipe,
equidiameter special-shaped cast steel tee (three-branch pipe) is
installed.In the straight tube and the junction between the top
allied tank is equipped with orifice Φ 5 mm or Φ restrictor of 10
mm.In this way, most of the working medium bent pipe is conducive
to the cooling of the flame Angle, and a small part of the working
medium bent pipe ensures that the straight pipe and the curved pipe
have the corresponding amount of expansion, so as to reduce the
internal stress, so the difficulty of passing through the ball
increases.
Attention
| 1 | Water wall panels are used in Waste Heat recovery boilers. | | 2 | We manufacture Water wall panels,these are fabricated out of carbon
steel tubes to customers' drawings and specifications. | | 3 | Special care is taken for ovality and thinning at the bent
portion,during fabrication. | | 4 | We are manufacturing and supplying a comprehensive range of
Waterwall Panels. | | 5 | The tubes offered by us are known to withstand a great internal
pressure as a continual strip of fin material is wound spirally on
the tube. | | 6 | These tubes are known to provide heat uniformly that result in an
increased heat output. | | 7 | The main function of water wall panels in boiler is to absorb the
heat generated by high temperature flame or flue and to generate
steam or hot water in tubes, hence to reduce the temperature in the
chamber. |
Company Information
- We strive to manufacture "Safe, Efficient, Energy-Saving and
Environment-Friendly" boilers, provide new-type products in
excellent quality, serve users sincerely to their satisfaction, and
be a top supplier of boilers in China.
- Hua Dong Boiler Co., Ltd. is a high-tech enterprise specialized in
manufacturing boilers. Established in early 1985s, has two
manufacturing bases, this company covers 200,000 ㎡ with fixed
assets amounting to USD 110,000,000. There are 350 employees
including 80 technicians and 200 coded welders.
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