The present invention relates to a high-alkali biomass combustion system.
BACKGROUND OF THE INVENTION
Combustion systems are widely used in production of steam for power
generation plant. The design of combustion systems has changed over a
period of time to increase efficiency, optimize cost, and enhance capability
to operate with variety of fuels. However, the combustion system currently
available which operate with fuel having high-alkali content have low
availability period for power generation due to periodical shut down of the
power plant for maintenance to remove the ash deposit and clean the
cooling tubes having saturated ash.
In addition, the combustion system are prone to corrosion due to ash
deposit resulting in in-efficient power generation and increase in the cost
for repair and maintenance.
Hence, the object of present invention is to solve one or more of
aforementioned issues.
SUMMARY OF THE INVENTION
In an embodiment a high-alkali biomass combustion system is described.
The high-alkali biomass combustion system comprising a combustion
chamber for combustion of high-alkali biomass, wherein heat and hot
combustion gases are generated; a first vertical chamber connected to the
combustion chamber, wherein the hot combustion gases flow from the
combustion chamber to the first vertical chamber; a second vertical
chamber connected to the first vertical chamber, wherein the second
vertical chamber comprises a first cooling tubes adapted vertically within it;
2
5
10
15
20
25
a first connection unit connecting the first vertical chamber and the second
vertical chamber at the bottom, wherein the hot combustion gases flow
from the first vertical chamber to the second vertical chamber through the
first connection unit, and the first connection unit has a trapezoidal shape;
a horizontal chamber connected to the second vertical chamber, wherein
the horizontal chamber comprises a horizontal cooling tubes adapted
vertically within it, and the hot combustion gases flow from the second
vertical chamber to the horizontal chamber; a third vertical chamber
connected to the horizontal chamber, wherein the third vertical chamber
comprises a second cooling tubes adapted vertically within it, and the hot
combustion gases flow from the horizontal chamber to the third vertical
chamber; a fourth vertical chamber connected to the third vertical
chamber, wherein the fourth vertical chamber comprises a third cooling
tubes adapted vertically within it; and a second connection unit connecting
the third vertical chamber and the fourth vertical chamber at the bottom,
wherein the hot combustion gases flow from the third vertical chamber to
the fourth vertical chamber through the second connection unit, and the
second connection unit has a trapezoidal shape.
In another embodiment, a high-alkali biomass combustion system is
described. The high-alkali biomass combustion system comprising a
combustion chamber for combustion of high-alkali biomass, wherein heat
and hot combustion gases are generated; a first vertical chamber
connected to the combustion chamber, wherein the hot combustion gases
flow from the combustion chamber to the first vertical chamber; a second
vertical chamber connected to the first vertical chamber, wherein the
second vertical chamber comprises a first cooling tubes adapted vertically
within it; a first connection unit connecting the first vertical vertical
chamber and the second vertical chamber at the bottom, wherein the hot
combustion gases flow from the first vertical chamber to the second
3
5
10
15
20
25
30
vertical chamber through the first connection unit, and the first connection
unit has a trapezoidal shape; a horizontal chamber connected to the
second vertical chamber, wherein the horizontal chamber comprises a
horizontal cooling tubes adapted vertically within it, and the hot
combustion gases flow from the second vertical chamber to the horizontal
chamber; a third vertical chamber connected to the horizontal chamber,
wherein the third vertical chamber comprises a second cooling tubes
adapted vertically within it, and the hot combustion gases flow from the
horizontal chamber to the third vertical chamber; a fourth vertical chamber
connected to the third vertical chamber, wherein the fourth vertical
chamber comprises a third cooling tubes adapted vertically within it; a
second connection unit connecting the third vertical vertical chamber and
the fourth vertical chamber at the bottom, wherein the hot combustion
gases flow from the third vertical chamber to the fourth vertical chamber
through the second connection unit, and the second connection unit has a
trapezoidal shape; a fifth vertical chamber connected to the fourth vertical
chamber, wherein the fifth vertical chamber comprises a fourth cooling
tubes adapted vertically within it, and the hot combustion gases flow from
the fourth vertical chamber to the fifth vertical chamber; a sixth vertical
chamber connected to the fifth vertical chamber, wherein the sixth vertical
chamber comprises a fifth cooling tubes adapted vertically within it; and a
third connection unit connecting the fifth vertical vertical chamber and the
sixth vertical chamber at the bottom, wherein the hot combustion gases
flow from the fifth vertical chamber to the sixth vertical chamber through
the third connection unit, and the third connection unit has a trapezoidal
shape.
BRIEF DESCRIPTION OF DRAWINGS
Reference will be made to embodiments of the invention, example of
which may be illustrated in the accompanying figure(s). These figure(s)
4
5
10
15
20
25
30
are intended to be illustrative, not limiting. Although the invention is
generally described in the context of these embodiments, it should be
understood that it is not intended to limit the scope of the invention to
these particular embodiments.
Figure 1 shows a perspective view of a high-alkali biomass
combustion system according to an embodiment of the present invention;
Figure 2 shows a top view of a high-alkali biomass combustion
system according to an embodiment of the present invention;
Figure 3 shows a detailed view of a horizontal chamber of a highalkali biomass combustion system according to an embodiment of the
present invention; and
Figure 4 shows a detailed view of a second vertical chamber of a
high-alkali biomass combustion system according to an embodiment of the
present invention.
DETAILED DESCRIPTION OF THE INVENTION
In an embodiment, a high-alkali biomass combustion system is described.
The high-alkali biomass combustion system is designed to efficiently
generate steam and remove ash content in hot combustion gases. The
steam generated from the high-alkali biomass combustion system may be
used in power plant for generation of electricity. The high-alkali biomass
combustion system comprising a combustion chamber for combustion of
high-alkali biomass, wherein heat and hot combustion gases are
generated; a first vertical chamber connected to the combustion chamber,
wherein the hot combustion gases flow from the combustion chamber to
the first vertical chamber; a second vertical chamber connected to the first
vertical chamber, wherein the second vertical chamber comprises a first
cooling tubes adapted vertically within it; a first connection unit connecting
the first vertical chamber and the second vertical chamber at the bottom,
5
5
10
15
20
25
wherein the hot combustion gases flow from the first vertical chamber to
the second vertical chamber through the first connection unit, and the first
connection unit has a trapezoidal shape; a horizontal chamber connected
to the second vertical chamber, wherein the horizontal chamber comprises
a horizontal cooling tubes adapted vertically within it, and the hot
combustion gases flow from the second vertical chamber to the horizontal
chamber; a third vertical chamber connected to the horizontal chamber,
wherein the third vertical chamber comprises a second cooling tubes
adapted vertically within it, and the hot combustion gases flow from the
horizontal chamber to the third vertical chamber; a fourth vertical chamber
connected to the third vertical chamber, wherein the fourth vertical
chamber comprises a third cooling tubes adapted vertically within it; and a
second connection unit connecting the third vertical chamber and the
fourth vertical chamber at the bottom, wherein the hot combustion gases
flow from the third vertical chamber to the fourth vertical chamber through
the second connection unit, and the second connection unit has a
trapezoidal shape.
The combustion chamber wall is formed of a tube-like structure for
allowing water to flow through it. The wall of the combustion chamber may
comprises of multiple tube-like structure for allowing the water to
continuously flow through it for transfer of heat to produce steam.
The combustion chamber has an inlet port for receiving biomass, an
ignition unit for combustion of biomass, and an outlet port at the top of the
combustion chamber for outflow of hot combustion gases generated
during combustion to the first vertical chamber. Additionally, the ignition
unit may have a secured opening for removal of ash generated during
combustion.
6
5
10
15
20
25
The first vertical chamber wall is formed of a tube-like structure for
allowing water to flow through it. The first vertical chamber has a first inlet
port at the top of the first vertical chamber, and a first outlet port at the
bottom of the first vertical chamber, and the outlet port of the combustion
chamber is connected to the first inlet port of the first vertical chamber,
and the hot combustion gases received at the first inlet port flows from the
top of the first vertical chamber towards the bottom of the first vertical
chamber.
The second vertical chamber wall is formed of a tube-like structure for
allowing water to flow through it. The second vertical chamber has a
second inlet port at bottom of the second vertical chamber, and a second
outlet port at top of the second vertical chamber. The first outlet port of the
first vertical chamber at the bottom is connected to the second inlet port of
the second vertical chamber at the bottom through the first connection
unit, and the hot combustion gases flow from first outlet port of the first
vertical chamber to the second inlet port of the second vertical chamber
through the first connection unit. The hot combustion gases flow from
bottom of the second vertical chamber towards the top of the chamber.
The horizontal chamber wall is formed of a tube-like structure for allowing
water to flow through it. The horizontal chamber has a horizontal inlet
port, a horizontal outlet port, and a secured opening at the bottom for ash
removal. The horizontal inlet port is connected to second outlet port of the
second vertical chamber, and the hot combustion gases flow from the
second outlet port of the second vertical chamber to the horizontal inlet
port.
7
5
10
15
20
25
The horizontal chamber of the combustion system is designed for
maximum heat transfer from the hot gases to the water flowing in the
cooling tubes. The cooling tubes are arranged vertically, and the ash
deposit in the horizontal chamber is removed through the secured opening
at the bottom which may be opened for removal of ash and thereafter be
closed.
The third vertical chamber wall is formed of a tube-like structure for
allowing water to flow through it. The third vertical chamber has a third
inlet port at the top of the third vertical chamber, and a third outlet port at
the bottom of the third vertical chamber. The third inlet port of the third
vertical chamber is connected to the horizontal outlet port of the horizontal
port, and the hot combustion gases flow from the horizontal outlet port to
the third inlet port. The hot combustion gases flow from top to bottom of
the chamber.
The fourth vertical chamber wall is formed of a tube-like structure for
allowing water to flow through it. The fourth vertical chamber has a fourth
inlet port at bottom of the fourth vertical chamber, and a fourth outlet port
at top of the fourth vertical chamber. The fourth inlet port of the fourth
vertical chamber at the bottom is connected to the third outlet port of the
third vertical chamber at the bottom through the second connection unit.
The hot combustion gases flow from the third outlet port of the third
vertical chamber to the fourth inlet port of the fourth vertical chamber
through the second connection unit. The hot combustion gases flow from
bottom of the chamber towards the top.
The first connection unit, and the second connection unit has a trapezoidal
shape enclosure, with the tapered end at the bottom, and the bottom of
8
5
10
15
20
25
the first connection unit and the second connection unit has a secured
opening for removal of ash.
The high-alkali biomass combustion system further comprises a fifth
vertical chamber connected to the fourth vertical chamber, a sixth vertical
chamber connected to the fifth vertical chamber, and a third connection
unit connecting the fifth vertical chamber to the sixth vertical chamber.
As described, the high-alkali combustion system comprises multiple
vertical chambers and a horizontal chamber. The vertical chambers allow
vertical flow of the hot combustion gases i.e. from top to bottom of the
chamber or from bottom to top of the chamber. The horizontal chamber
allow horizontal flow of the hot combustion gases. The flow of hot
combustion gases from top to bottom of the chamber or from bottom to top
of the chamber result in substantial removal of ash content from the hot
combustion gases.
The cooling tubes adapted within the vertical chambers or horizontal
chamber are arranged vertically extending between horizontal support
tubes, and the water continuously flows in the cooling tubes. The flow of
hot combustion gases in the vertical chambers or horizontal chamber,
wherein the cooling tubes are vertically placed, the ash content doesn’t
stick to the cooling tubes due to vertical arrangement of the cooling tubes
widely spaced thereby resulting into substantial removal of the ash content
along with preventing the cooling tubes from corrosion.
The arrangement of the chambers into multiple vertical chambers and a
horizontal chamber creates a high velocity and low velocity cycles, thereby
9
5
10
15
20
25
resulting in removal of high ash content from the hot combustion gases.
Additionally, the wall of the vertical chambers and/or the horizontal
chamber may comprise multiple tube-like structure for continuous flow of
water. Alternatively, a single side wall from either of adjacent chambers
may be used for separation of chambers.
In another embodiment, a high-alkali biomass combustion system is
described. The high-alkali biomass combustion system comprising a
combustion chamber for combustion of high-alkali biomass, wherein heat
and hot combustion gases are generated; a first vertical chamber
connected to the combustion chamber, wherein the hot combustion gases
flow from the combustion chamber to the first vertical chamber; a second
vertical chamber connected to the first vertical chamber, wherein the
second vertical chamber comprises a first cooling tubes adapted vertically
within it; a first connection unit connecting the first vertical vertical
chamber and the second vertical chamber at the bottom, wherein the hot
combustion gases flow from the first vertical chamber to the second
vertical chamber through the first connection unit, and the first connection
unit has a trapezoidal shape; a horizontal chamber connected to the
second vertical chamber, wherein the horizontal chamber comprises a
horizontal cooling tubes adapted vertically within it, and the hot
combustion gases flow from the second vertical chamber to the horizontal
chamber; a third vertical chamber connected to the horizontal chamber,
wherein the third vertical chamber comprises a second cooling tubes
adapted vertically within it, and the hot combustion gases flow from the
horizontal chamber to the third vertical chamber; a fourth vertical chamber
connected to the third vertical chamber, wherein the fourth vertical
chamber comprises a third cooling tubes adapted vertically within it; a
second connection unit connecting the third vertical vertical chamber and
the fourth vertical chamber at the bottom, wherein the hot combustion
10
5
10
15
20
25
30
gases flow from the third vertical chamber to the fourth vertical chamber
through the second connection unit, and the second connection unit has a
trapezoidal shape; a fifth vertical chamber connected to the fourth vertical
chamber, wherein the fifth vertical chamber comprises a fourth cooling
tubes adapted vertically within it, and the hot combustion gases flow from
the fourth vertical chamber to the fifth vertical chamber; a sixth vertical
chamber connected to the fifth vertical chamber, wherein the sixth vertical
chamber comprises a fifth cooling tubes adapted vertically within it; and a
third connection unit connecting the fifth vertical vertical chamber and the
sixth vertical chamber at the bottom, wherein the hot combustion gases
flow from the fifth vertical chamber to the sixth vertical chamber through
the third connection unit, and the third connection unit has a trapezoidal
shape.
The fifth vertical chamber wall is formed of a tube-like structure for
allowing water to flow through it. The fifth vertical chamber has a fifth inlet
port at the top of the fifth vertical chamber, and a fifth outlet port at the
bottom of the fifth vertical chamber. The fifth inlet port of the fifth vertical
chamber is connected to the fourth outlet port of the fourth vertical
chamber, and the hot combustion gases flow from the fourth outlet port to
the fifth inlet port. The hot combustion gases flow from top to bottom of the
chamber.
The sixth vertical chamber wall is formed of a tube-like structure for
allowing water to flow through it. The sixth vertical chamber has a sixth
inlet port at bottom of the sixth vertical chamber, and a sixth outlet port at
top of the sixth vertical chamber. The fifth outlet port of the fifth vertical
chamber at the bottom is connected to the sixth inlet port of the sixth
vertical chamber at the bottom through the third connection unit. The hot
11
5
10
15
20
25
combustion gases flow from the fifth outlet port of the fifth vertical chamber
to the sixth inlet port of the sixth vertical chamber through the third
connection unit. The hot combustion gases flow from bottom of the
chamber towards the top.
The subject matter is now described with reference to the drawings,
wherein like reference numerals are used to refer to like elements
throughout. In the following description, for the purpose of explanation,
numerous specific details are set forth in order to provide a thorough
understanding of the claimed subject matter. It may be evident however,
that such matter can be practiced with these specific details. In other
instances, well-known structures as shown in diagram form in order to
facilitate describing the invention.
Referring Figure 1, a high-alkali biomass combustion system (100) is
shown, the high-alkali biomass combustion system (100) comprising a
combustion chamber (110) for combustion of high-alkali biomass, wherein
heat and hot combustion gases (111) are generated; a first vertical
chamber (120) connected to the combustion chamber (110), wherein the
hot combustion gases (111) flow from the combustion chamber (110) to
the first vertical chamber (120); a second vertical chamber (130)
connected to the first vertical chamber (120), wherein the second vertical
chamber (130) comprises a first cooling tubes (131) adapted vertically
within it; a first connection unit (210) connecting the first vertical vertical
chamber (120) and the second vertical chamber (130) at the bottom,
wherein the hot combustion gases (111) flow from the first vertical
chamber (120) to the second vertical chamber (130) through the first
connection unit (210), and the first connection unit (210) has a trapezoidal
shape; a horizontal chamber (140) connected to the second vertical
12
5
10
15
20
25
chamber (130), wherein the horizontal chamber (140) comprises a
horizontal cooling tubes (141) adapted vertically within it, and the hot
combustion gases (111) flow from the second vertical chamber (130) to
the horizontal chamber (140); a third vertical chamber (150) connected to
the horizontal chamber (140), wherein the third vertical chamber (150)
comprises a second cooling tubes (151) adapted vertically within it, and
the hot combustion gases (111) flow from the horizontal chamber (140) to
the third vertical chamber (150); a fourth vertical chamber (160) connected
to the third vertical chamber (150), wherein the fourth vertical chamber
(160) comprises a third cooling tubes (161) adapted vertically within it; a
second connection unit (220) connecting the third vertical vertical chamber
(150) and the fourth vertical chamber (160) at the bottom, wherein the hot
combustion gases (111) flow from the third vertical chamber (150) to the
fourth vertical chamber (160) through the second connection unit (220),
and the second connection unit (220) has a trapezoidal shape; a fifth
vertical chamber (170) connected to the fourth vertical chamber (160),
wherein the fifth vertical chamber (170) comprises a fourth cooling tubes
(171) adapted vertically within it, and the hot combustion gases (111) flow
from the fourth vertical chamber (160) to the fifth vertical chamber (170); a
sixth vertical chamber (180) connected to the fifth vertical chamber (170),
wherein the sixth vertical chamber (180) comprises a fifth cooling tubes
(181) adapted vertically within it; and a third connection unit (230)
connecting the fifth vertical vertical chamber (170) and the sixth vertical
chamber (180) at the bottom, wherein the hot combustion gases (111) flow
from the fifth vertical chamber (170) to the sixth vertical chamber (180)
through the third connection unit (230), and the third connection unit (230)
has a trapezoidal shape.
As shown in Figure 1, first connection unit (210), the second connection
unit (220), and the third connection unit (230) has a trapezoidal shape
13
5
10
15
20
25
30
enclosure, with the tapered end at the bottom, and the bottom of the first
connection unit (210), the second connection unit (220), and the third
connection unit (230) has a secured opening (211, 221, 231) for removal
of ash deposited from the chambers.
Referring Figure 2, a top view of a high-alkali biomass combustion system
(100) is shown. As shown in Figure 2, the high-alkali biomass combustion
system comprises a combustion chamber (110), a first vertical chamber
(120) connected to the combustion chamber (110), a second vertical
chamber (130) connected to the first vertical chamber (120), a horizontal
chamber (140) connected to the second vertical chamber (130), a third
vertical chamber (150) connected to the horizontal chamber (140), a fourth
vertical chamber (160) connected to the third vertical chamber (150), a
fifth vertical chamber (170) connected to the fourth vertical chamber (160),
and a sixth vertical chamber (180) connected to the fifth vertical chamber
(170).
Referring Figure 3, a detailed view of a horizontal chamber (140) of a highalkali biomass combustion system (100) is shown. As shown in Figure 3,
the horizontal chamber (140) comprises a horizontal cooling tubes (141).
The horizontal cooling tubes (141) comprises of horizontal tubes (142),
and vertical tubes (143). The vertical tubes (143) extend downwards from
the horizontal tubes (142). The horizontal chamber (140) provides
maximum surface area of contact of the hot combustion gases with the
horizontal cooling tube thereby substantially reducing the temperature of
the hot combustion gases resulting in high ash generation. The horizontal
chamber (140) comprises a secured opening (not shown) at the bottom for
ash removal. Advantageously, the arrangement of the horizontal cooling
tubes (141) in the vertical orientation prevents saturation of ash on cooling
14
5
10
15
20
25
tubes, as the cooling tubes are arranged vertically, and the ash flow
downwards.
Referring Figure 4, a detailed view of a second vertical chamber (130) of a
high-alkali biomass combustion system (100) is shown. As shown in
Figure 4, the second vertical chamber (130) comprises a first cooling
tubes (131). The first cooling tubes (131) comprises horizontal tubes
(132), and a vertical tubes (133) extending downwards from the horizontal
tubes (132). The water continuously flows in the first cooling tubes (131)
for transfer of heat from the hot combustion gases to the water, thereby
resulting in steam generation.
INDUSTRIAL APPLICABILITY
It is apparent that the high-alkali biomass combustion system of the
present invention efficiently transfers heat to the cooling tubes adapted
within the chambers, and removes ash content in hot gases generated
during combustion thereby resulting in lower maintenance cost of the
system, and high availability of the system for electricity generation.
The foregoing description of the invention has been set merely to illustrate
the invention and is not intended to be limiting. Since modifications of the
disclosed embodiments incorporating the substance of the invention may
occur to a person skilled in the art, the invention should be construed to
include everything within the scope of the disclosure.

We claim:
1. A high-alkali biomass combustion system comprising:
a combustion chamber for combustion of high-alkali
biomass, wherein heat and hot combustion gases are generated;
a first vertical chamber connected to the combustion
chamber, wherein the hot combustion gases flow from the combustion
chamber to the first vertical chamber;
a second vertical chamber connected to the first vertical
chamber, wherein the second vertical chamber comprises a first cooling
tubes adapted vertically within it;
a first connection unit connecting the first vertical chamber
and the second vertical chamber at the bottom, wherein the hot
combustion gases flow from the first vertical chamber to the second
vertical chamber through the first connection unit, and the first connection
unit has a trapezoidal shape;
a horizontal chamber connected to the second vertical
chamber, wherein the horizontal chamber comprises a horizontal cooling
tubes adapted vertically within it, and the hot combustion gases flow from
the second vertical chamber to the horizontal chamber;
a third vertical chamber connected to the horizontal
chamber, wherein the third vertical chamber comprises a second cooling
tubes adapted vertically within it, and the hot combustion gases flow from
the horizontal chamber to the third vertical chamber;
a fourth vertical chamber connected to the third vertical
chamber, wherein the fourth vertical chamber comprises a third cooling
tubes adapted vertically within it; and
16
5
10
15
20
25
a second connection unit connecting the third vertical
chamber and the fourth vertical chamber at the bottom, wherein the hot
combustion gases flow from the third vertical chamber to the fourth vertical
chamber through the second connection unit, and the second connection
unit has a trapezoidal shape.
2. The high-alkali biomass combustion system as claimed in Claim 1,
wherein the combustion chamber wall is formed of a tube-like
structure for allowing water to flow through it, and the combustion
chamber has an inlet port for receiving biomass, an ignition unit for
combustion of biomass, and an outlet port at the top of the
combustion chamber for outflow of hot combustion gases
generated during combustion to the first vertical chamber.
3. The high-alkali biomass combustion system as claimed in Claim 1,
wherein the first vertical chamber wall is formed of a tube-like
structure for allowing water to flow through it, and the first vertical
chamber has a first inlet port at the top of the first vertical chamber,
and a first outlet port at the bottom of the first vertical chamber, and
the outlet port of the combustion chamber is connected to the first
inlet port of the first vertical chamber, and the hot combustion gases
received at the first inlet port flows from the top of the first vertical
chamber towards the bottom of the first vertical chamber.
4. The high-alkali biomass combustion system as claimed in Claim 1,
wherein the second vertical chamber wall is formed of a tube-like
structure for allowing water to flow through it, and the second
vertical chamber has a second inlet port at bottom of the second
vertical chamber, and a second outlet port at top of the second
17
5
10
15
20
25
vertical chamber, and the first outlet port of the first vertical
chamber is connected to the second inlet port of the second vertical
chamber through the first connection unit, and the hot combustion
gases flow from first outlet port of the first vertical chamber to the
second inlet port of the second vertical chamber through the first
connection unit.
5. The high-alkali biomass combustion system as claimed in Claim 1,
wherein the horizontal chamber wall is formed of a tube-like
structure for allowing water to flow through it, and the horizontal
chamber has a horizontal inlet port, a horizontal outlet port, and a
secured opening at the bottom for ash removal, and the horizontal
inlet port is connected to second outlet port of the second vertical
chamber, and the hot combustion gases flow from the second outlet
port of the second vertical chamber to the horizontal inlet port.
6. The high-alkali biomass combustion system as claimed in Claim 1,
wherein the third vertical chamber wall is formed of a tube-like
structure for allowing water to flow through it, and the third vertical
chamber has a third inlet port at the top of the third vertical
chamber, and a third outlet port at the bottom of the third vertical
chamber, and the third inlet port of the third vertical chamber is
connected to the horizontal outlet port of the horizontal port, and the
hot combustion gases flow from the horizontal outlet port to the
third inlet port.
7. The high-alkali biomass combustion system as claimed in Claim 1,
wherein the fourth vertical chamber wall is formed of a tube-like
structure for allowing water to flow through it, and the fourth vertical
18
5
10
15
20
25
chamber has a fourth inlet port at bottom of the fourth vertical
chamber, and a fourth outlet port at top of the fourth vertical
chamber, and the fourth inlet port of the fourth vertical chamber is
connected to the third outlet port of the third vertical chamber
through the second connection unit, and the hot combustion gases
flow from the third outlet port of the third vertical chamber to the
fourth inlet port of the fourth vertical chamber through the second
connection unit.
8. The high-alkali biomass combustion system as claimed in Claim 1,
wherein the first connection unit, and the second connection unit
has a trapezoidal shape enclosure, with the tapered end at the
bottom, and the bottom of the first connection unit and the second
connection unit has a secured opening for removal of ash.
9. The high-alkali biomass combustion system as claimed in claim 1,
further comprises a fifth vertical chamber connected to the fourth
vertical chamber, a sixth vertical chamber connected to the fifth
vertical chamber, and a third connection unit connecting the fifth
vertical chamber to the sixth vertical chamber.
10.A high-alkali biomass combustion system (100) comprising:
a combustion chamber (110) for combustion of high-alkali
biomass, wherein heat and hot combustion gases (111) are generated;
a first vertical chamber (120) connected to the combustion
chamber (110), wherein the hot combustion gases (111) flow from the
combustion chamber (110) to the first vertical chamber (120);
19
5
10
15
20
25
a second vertical chamber (130) connected to the first
vertical chamber (120), wherein the second vertical chamber (130)
comprises a first cooling tubes (131) adapted vertically within it;
a first connection unit (210) connecting the first vertical
vertical chamber (120) and the second vertical chamber (130) at the
bottom, wherein the hot combustion gases (111) flow from the first vertical
chamber (120) to the second vertical chamber (130) through the first
connection unit (210), and the first connection unit (210) has a trapezoidal
shape;
a horizontal chamber (140) connected to the second vertical
chamber (130), wherein the horizontal chamber (140) comprises a
horizontal cooling tubes (141) adapted vertically within it, and the hot
combustion gases (111) flow from the second vertical chamber (130) to
the horizontal chamber (140);
a third vertical chamber (150) connected to the horizontal
chamber (140), wherein the third vertical chamber (150) comprises a
second cooling tubes (151) adapted vertically within it, and the hot
combustion gases (111) flow from the horizontal chamber (140) to the
third vertical chamber (150);
a fourth vertical chamber (160) connected to the third vertical
chamber (150), wherein the fourth vertical chamber (160) comprises a
third cooling tubes (161) adapted vertically within it;
a second connection unit (220) connecting the third vertical
vertical chamber (150) and the fourth vertical chamber (160) at the bottom,
wherein the hot combustion gases (111) flow from the third vertical
chamber (150) to the fourth vertical chamber (160) through the second
connection unit (220), and the second connection unit (220) has a
trapezoidal shape;
20
5
10
15
20
25
a fifth vertical chamber (170) connected to the fourth vertical
chamber (160), wherein the fifth vertical chamber (170) comprises a fourth
cooling tubes (171) adapted vertically within it, and the hot combustion
gases (111) flow from the fourth vertical chamber (160) to the fifth vertical
chamber (170);
a sixth vertical chamber (180) connected to the fifth vertical
chamber (170), wherein the sixth vertical chamber (180) comprises a fifth
cooling tubes (181) adapted vertically within it; and
a third connection unit (230) connecting the fifth vertical
vertical chamber (170) and the sixth vertical chamber (180) at the bottom,
wherein the hot combustion gases (111) flow from the fifth vertical
chamber (170) to the sixth vertical chamber (180) through the third
connection unit (230), and the third connection unit (230) has a trapezoidal
shape.