U.S. patent application number 14/234428 was filed with the patent office on 2014-06-12 for combustion device.
This patent application is currently assigned to HANSUNG HIGH FREQUENCY CO., LTD.. The applicant listed for this patent is Seok Joong Hwang. Invention is credited to Seok Joong Hwang.
Application Number | 20140158108 14/234428 |
Document ID | / |
Family ID | 47113970 |
Filed Date | 2014-06-12 |
United States Patent
Application |
20140158108 |
Kind Code |
A1 |
Hwang; Seok Joong |
June 12, 2014 |
COMBUSTION DEVICE
Abstract
The present invention pertains to a combustion device which is
mounted to a wood boiler or the likes and generates high thermal
power while decreasing soot by means of a simple structure.
According to the present invention, a combustion device comprises;
a main body having a porous plate which is formed inside and on
which injected fuel is stacked; a fuel injection section
communicating with one side of the upper portion of the main body;
a first air supply section communicating with the lower portion of
the porous plate of the main body and supplying air; an ignition
section formed to be adjacent to the porous plate and igniting the
fuel; a flame discharge section extending from the other side of
the upper portion of the main body and discharging the flame and
heat caused by the combustion; a cyclone section formed in the
shape of a short cylinder and expanding in a lateral direction from
the periphery of the flame discharge section so as to partially
expand the path of the flame discharge section; and a second air
supply section communicating with one side of the periphery of the
cyclone section and supplying air to the cyclone section in a
tangential direction.
Inventors: |
Hwang; Seok Joong;
(Siheung-si, KR) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
Hwang; Seok Joong |
Siheung-si |
|
KR |
|
|
Assignee: |
HANSUNG HIGH FREQUENCY CO.,
LTD.
Ansan-si, Gyeonggi-do
KR
|
Family ID: |
47113970 |
Appl. No.: |
14/234428 |
Filed: |
October 5, 2011 |
PCT Filed: |
October 5, 2011 |
PCT NO: |
PCT/KR2011/007335 |
371 Date: |
January 23, 2014 |
Current U.S.
Class: |
126/77 ;
126/163R; 126/307R; 126/312 |
Current CPC
Class: |
F24B 5/023 20130101;
F23B 50/12 20130101; F24B 5/028 20130101; F23G 2209/261 20130101;
F24D 2200/067 20130101; F23B 60/02 20130101; F23B 90/04 20130101;
F23B 10/02 20130101; F23G 5/027 20130101; F24B 1/024 20130101; F24B
13/006 20130101; F24B 7/02 20130101 |
Class at
Publication: |
126/77 ;
126/163.R; 126/307.R; 126/312 |
International
Class: |
F24B 1/02 20060101
F24B001/02; F24B 13/00 20060101 F24B013/00; F24B 5/02 20060101
F24B005/02 |
Foreign Application Data
Date |
Code |
Application Number |
Jul 29, 2011 |
KR |
10-2011-0075700 |
Claims
1. A combustion device comprises; a main body having a porous plate
which is formed inside and on which injected fuel is stacked; a
fuel injection section communicating with one side of the upper
portion of the main body; a first air supply section communicating
with the lower portion of the porous plate of the main body and
supplying air; an ignition section formed to be adjacent to the
porous plate and igniting the fuel; a flame discharge section
extending from the other side of the upper portion of the main body
and discharging the flame and heat caused by the combustion; a
cyclone section formed in the shape of a short cylinder and
expanding in a lateral direction from the periphery of the flame
discharge section so as to partially expand the path of the flame
discharge section; and a second air supply section communicating
with one side of the periphery of the cyclone section and supplying
air to the cyclone section in a tangential direction.
2. A combustion device of claim 1, wherein the flame discharge
section has a tapered inner portion between the main body and the
cyclone section to restrict the backward air flow.
3. A combustion device of claim 1, wherein the fuel injection
section is formed in the shape of tube, and a backfire prevention
air injection hole is formed on the periphery of the fuel injection
section.
4. A combustion device of claim 2, wherein the fuel injection
section is formed in the shape of tube, and a backfire prevention
air injection hole is formed on the periphery of the fuel injection
section.
5. A combustion device of claim 1, wherein small holes are formed
on the periphery of the cyclone section to exhaust the ash
generated after combustion.
6. A combustion device of claim 2, wherein small holes are formed
on the periphery of the cyclone section to exhaust the ash
generated after combustion.
Description
TECHNICAL FIELD
[0001] The invention relates to a combustion device, and more
particularly to a combustion device which has a simple structure
and burns wood chips, wood pellets or other fuel to achieve high
heat efficiency and strong thermal power and generate less soot or
air pollution.
BACKGROUND ART
[0002] The combustion devices or burners which use wood fuels such
as sawdust, wood chips or wood pellets produced by extruding the
wood chips are widely used on the boiler, stove, heater or hot air
generator. To use the burner of this type, the user should pour the
sawdust, wood chips or wood pellets on the porous plate or grate in
the body of the burner and set fire and supply air on them. In this
case, if the supplied air is not sufficient, the fuel will not be
burned completely, and much soot will be generated and the
sufficient thermal power may not be attained. Contrarily, if the
air is supplied powerfully for sufficient oxygen, then the unburned
particles of wood fuel on the grate or the soot of the incompletely
burned fuel particles will fly and be scattered outside the burner
by the powerful air blow, which results in the insufficient thermal
power or low heat efficiency of the combustion device, and the
surrounding air will be polluted owing to the scattered unburned
dust or soot of the wood fuel.
DISCLOSURE
Technical Problem
[0003] The invention is suggested to solve the above mentioned
problems of the conventional combustion devices, and the object of
the invention is to provide a new combustion device which has a
simple structure and burns wood chips, wood pellets or other fuel
to achieve high heat efficiency and strong thermal power and
generate less soot or air pollution.
Technical Solution
[0004] To attain the above object of the invention, according to an
aspect of the invention, there is provided a combustion device
comprises; a main body having a porous plate which is formed inside
and on which injected fuel is stacked; a fuel injection section
communicating with one side of the upper portion of the main body;
a first air supply section communicating with the lower portion of
the porous plate of the main body and supplying air; an ignition
section formed to be adjacent to the porous plate and igniting the
fuel; a flame discharge section extending from the other side of
the upper portion of the main body and discharging the flame and
heat caused by the combustion; a cyclone section formed in the
shape of a short cylinder and expanding in a lateral direction from
the periphery of the flame discharge section so as to partially
expand the path of the flame discharge section; and a second air
supply section communicating with one side of the periphery of the
cyclone section and supplying air to the cyclone section in a
tangential direction.
[0005] According to another aspect of the invention, the flame
discharge section has a tapered inner portion between the main body
and the cyclone section to restrict the backward air flow.
[0006] According to another aspect of the invention, the fuel
injection section is formed in the shape of tube, and a backfire
prevention air injection hole is formed on the periphery of the
fuel injection section.
[0007] According to another aspect of the invention, small holes
are formed on the periphery of the cyclone section to exhaust the
ash generated after combustion.
Advantageous Effects
[0008] According to the invention, as the fuel stacked on the
porous plate is burned by the air supplied through the first air
supply section and the flame and heat are discharged through the
flame discharge section, even though the air is supplied powerfully
for sufficient oxygen through the first air supply section, so the
unburned particles of fuel or the soot of the incompletely burned
fuel are to fly and be discharged through the flame discharge
section, they should be induced toward the cyclone section by the
centrifugal force of the tangential air inflow through the second
air supply section and circulate inside the cyclone section and are
burned again by use of the oxygen in the additional air from the
second air supply section, which results in almost complete
combustion and prevents the unburned fuel particles or the soot of
incomplete burned fuel from discharging through the flame discharge
section. Therefore, the combustion device according to the
invention is possible to achieve an effective combustion device
having higher thermal power and higher heat efficiency with least
environmental pollution owing to the discharged unburned fuel
particles, soot or smoke.
[0009] In addition, as the flame discharge section has a tapered
inner portion between the main body and the cyclone section to
restrict the backward air flow, the circulating air in the cyclone
section would flow to exhaust outward rather than flow backward
into the main body, so that the flame and air should flow outward
smoothly.
[0010] In addition, as the fuel injection section is formed in the
shape of tube and a backfire prevention air injection hole is
formed on the periphery of the of the fuel injection section, the
flame in the main body of the burner is not prevented from
backfiring through the fuel injection section.
[0011] In addition, as small holes are formed on the periphery of
the cyclone section, the small amount of ashes created after the
second burning of the incompletely burned fuel and soot could be
emitted outward, so the accumulation of the ash inside the cyclone
section may be prevented.
DESCRIPTION OF THE DRAWINGS
[0012] The above and other objects and advantages of the invention
will become more apparent by describing a preferred embodiment with
reference to the accompanying drawings in which:
[0013] FIG. 1 is a perspective view of the preferred embodiment of
the invention.
[0014] FIG. 2 is a sectional view of the above embodiment of the
invention.
[0015] FIG. 3 is an example of the hot air generator which the
invention is applied to.
BEST MODE
[0016] Hereinafter, a preferred embodiment of the invention will be
described with reference to the accompanying drawings. FIG. 1 is a
perspective view of the embodiment of the invention and FIG. 2 is a
sectional view of the embodiment of the invention. As shown, the
combustion device 2 of the invention comprises a case type main
body 10, a porous plate 12 or grate placed horizontally in the
lower part of the main body 10, and a first air supply section 18
formed beneath the porous plate 12 through which the outer air
inflows. A fan or blower may be connected to the first air supply
section 18 to supply the air into the main body 10. An ignition
section 20 is formed above the first air supply section 18, or
right above the porous plate 12. A proper ignition means may be
attached to this ignition section 20 such as a gas torch or an
electrical heater.
[0017] A fuel injection section 14 is formed on one side of the
upper portion of the main body 10. This fuel injection section 14
may have various structures, but it is preferable to have space
between the inlet of the fuel injection section 14 and the main
body 10, so a lengthy tubular fuel injection section is desirable.
A backfire prevention air injection hole 15 is formed in the
periphery of the fuel injection section 14. This backfire
prevention air injection hole 15 is connected to the fuel injection
section 14 so as to direct the air toward the main body 10.
Accordingly if the pressured air is injected into the backfire
prevention air injection hole 15, the flame in the main body 10 is
prevented from backfiring through the fuel injection section
14.
[0018] A cylindrical flame discharge section 24 extends from on the
other side of the main body 24. This flame discharge section 24
discharges the flame and heat created in the main body 10 during
the combustion of the fuel and introduces them to necessary
utilities or a heat exchanger. In this preferred embodiment, a
short cylindrical cyclone section 30 is formed at the middle
portion of the flame discharge section 24, which expands in a
radial direction from the periphery of the flame discharge section
24. Due to this cyclone section 30, the exhausting sectional area
of the flame discharge section 24 is enlarged in a short distance.
And a second air supply section 32 is formed on the periphery of
the cyclone section 30, which communicates with cyclone section 30
in a tangential direction. A fan or blower may be connected to the
second air supply section 32 to supply strong air flow. As a
result, the strong circulating air flow is formed inside the
cyclone section 30.
[0019] According to the above structure of the cyclone section 30,
even though sufficient air may be supplied powerfully from the
first air supply section 18 to the main body 10 for sufficient
oxygen, and it may cause the unburned fuel particles and the soot
of the incompletely burned fuel to be discharged from the flame
discharge section 24, the centrifugal force due to the circulating
air created in the cyclone section 30 due to the air flow from the
second air supply section 32 will induce them toward the periphery
of the cyclone section 30, and those fuel particles or soot will be
retained and circulate in the cyclone section 30 and will be
secondly burned with the refilled flesh air supplied from the
second air supply section 32. Therefore, the unburned fuel
particles or the soot of the incompletely burned fuel may not be
discharged directly from the flame discharge section 24, but they
will be burned out secondly by the additional fresh air from the
second air supply section 32, which will result in the almost
complete combustion of the burner and the least emission of air
polluting particles such as unburned fuel particles or soot of the
incompletely burned fuel.
[0020] According to the invention, the flame discharge section 24
is provided with a tapered inner portion 34 at the inner side of
the cyclone section 30 facing the main body 10 to restrict the
backward air flow. The tapered inner portion 34 reduces the
sectional area of the flame discharge section 21 gradually from the
main body 10 to the inlet of the cyclone section 30, so that when
the circulating air exits from the cyclone section 30, the exiting
air may be restricted to flow backwardly into the main body 10, but
it may be smoothly introduced to flow toward the outside of the
flame discharge section 24.
[0021] And, plural small holes 31 are formed on the periphery of
the cyclone section 30, which enable the ashes created during the
secondly burning of the unburned fuel particles or incompletely
burned fuel in the cyclone section 30 by the additional fresh air
from the second air supply section 32 to be emitted from the
cyclone section 30. Therefore, the burned residuals such as ashes
may not be remained in the cyclone section 30.
[0022] In addition, the fuel injection section 14 is formed in the
shape of tube, and a backfire prevention air injection hole 15 is
formed on the periphery of the fuel injection section 14. The
backfire prevention air injection hole 15 is connected to the fuel
injection section 14 inclining toward the main body 10. By
injecting the pressured air, the flame in the main body 10 is
prevented from backfiring through the fuel in the tubular fuel
injection section 14. Preferably regulating valves may be attached
at the first air supply section 18, the second air supply section
32 and the backfire prevention air injection hole 15 to control the
volume of the air flow.
[0023] FIG. 3 shows the example of the hot air generator 1 which
uses the combustion device of the invention as heat source. The hot
air exhausted from the combustion device 2 of the invention is
induced through the heat exchanger 4 comprising of fin tubes and
delivered to demanding facilities. The invention may be applied as
various uses such as a hot air generator, a boiler, heater, stove
and others.
[0024] As described above, the invention has been described with
respect to particularly preferred embodiments. However, the
invention is not limited to the above embodiments, and it is
possible for one who has an ordinary skill in the art to make
various modifications and variations, without departing off the
spirit of the invention. Thus, the protective scope of the
invention is not defined within the detailed description thereof
but is defined by the claims to be described later and the
technical spirit of the invention.
* * * * *