U.S. patent application number 12/461765 was filed with the patent office on 2010-10-14 for pellet fuel combustion device.
Invention is credited to Dewang Li.
Application Number | 20100261128 12/461765 |
Document ID | / |
Family ID | 42024747 |
Filed Date | 2010-10-14 |
United States Patent
Application |
20100261128 |
Kind Code |
A1 |
Li; Dewang |
October 14, 2010 |
Pellet fuel combustion device
Abstract
This invention discloses a pellet fuel combustion device, which
comprises an electric arc ignition pin installed in the combustion
chamber to generate high-voltage electric arc. The pellet fuels
transported by the feeding mouth start burning once they touch the
electric arc. High-voltage electric arc is generated by electric
arc ignition pin the moment the pellet fuel combustion device
starts up, which accelerates igniting speed greatly and reduces
power consumption. Furthermore, the fuel pellets can achieve full
burning by scattering and touching electric arc without bringing on
smeek. Hence, this invention has great advantages over conventional
ignitions which produce heat and fire by resistance wire.
Inventors: |
Li; Dewang; (Zhongshan,
CN) |
Correspondence
Address: |
OLIFF & BERRIDGE, PLC
P.O. BOX 320850
ALEXANDRIA
VA
22320-4850
US
|
Family ID: |
42024747 |
Appl. No.: |
12/461765 |
Filed: |
August 24, 2009 |
Current U.S.
Class: |
431/264 ;
110/267; 110/293; 110/297 |
Current CPC
Class: |
F23N 2227/02 20200101;
F23K 3/14 20130101; F23L 1/00 20130101; F23N 2227/36 20200101; F23Q
3/008 20130101; F23B 40/08 20130101; Y02B 40/00 20130101 |
Class at
Publication: |
431/264 ;
110/267; 110/293; 110/297 |
International
Class: |
F23Q 3/00 20060101
F23Q003/00; F23K 3/00 20060101 F23K003/00; F23L 1/00 20060101
F23L001/00 |
Foreign Application Data
Date |
Code |
Application Number |
Apr 10, 2009 |
CN |
200920302068.X |
Claims
1. A pellet fuel combustion device, comprising a combustion
chamber, which is used to burn pellet fuels with a feeding mouth on
the sidewall; a fuel delivery system, which is used to feed pellet
fuels into the combustion chamber, the output of which connects to
the feeding mouth; an electric arc ignition system, which is used
to produce electric arc to burn the pellet fuels delivered into the
combustion chamber through the fuel delivery system.
2. The pellet fuel combustion device according to claim 1, wherein
the said electric arc ignition system comprises an electric arc
ignition pin, which is used to produce electric arc by electric
energy; a power supply equipment, which is used to supply the
electric arc ignition pin with power.
3. The pellet fuel combustion device according to claim 1, wherein
the said fuel feeding system comprises a fuel storage chamber,
which is used to store pellet fuels; a fuel feeding pipeline, which
connects the fuel storage chamber with the feeding mouth of
combustion chambered to transport the pellet fuels stored in the
fuel storage chambers to the combustion chamber.
4. The pellet fuel combustion device according to claim 2, wherein
the said electric arc ignition pin is installed in the combustion
chamber.
5. The pellet fuel combustion device according to claim 2, wherein
a blowing mouth is connected with blowing system. The said electric
arc ignition pin is installed nearby in front of the blowing mouth.
Electric arc generated by the electric arc ignition pin is
stretched by the wind produced by the blowing system, and then
reaches and ignites the pellet fuels.
6. The pellet fuel combustion device according to claim 5, wherein
the said blowing mouth is installed beneath the feeding mouth; a
striker plate is arranged between the blowing mouth and feeding
mouth; the said electric arc ignition pin is installed beneath the
striker plate so that the pellet fuels transported from the feeding
mouth to the combustion chamber can avoid falling onto the electric
arc ignition pin directly.
7. The pellet fuel combustion device according to claim 2, wherein
the said power supply equipment comprises high-frequency
oscillating circuits and a transformer. The input of the said
high-frequency oscillating circuits connects power source and the
output connects transformer. The output of the said transformer
connects to the electric arc ignition pin.
8. The pellet fuel combustion device according to claim 2, wherein
the said power supply equipment is preferably arranged on printed
board in an insulating box.
9. The pellet fuel combustion device according to c claim 1,
wherein the high-frequency oscillating circuits comprise diode 1;
triode 1; silicon controlled diode; capacitance 1; resistance 1;
current-limiting resistance 7 and inductor; the cathode of diode 1
connects the input of power, the anode connects parallel resistance
1, cathode 1 and cathode 2, one end of resistance 1 connects diode
1, the other to the transformer; one end of capacitance 1 connects
diode 1, the other to the cathode of diode 2; one end of
capacitance 2 connects diode 1, the other to the transformer by
current-limiting resistance 7; capacitance 3 is parallel to diode
2; the anode of diode 2 connects the control electrode of silicon
controlled diode by resistance 3, the connection between the anode
of diode 2 and resistance 3 connects the connection between
capacitance 2 and current-limiting resistance 7; the base region of
triode 1 whose emitter connects the common of diode 2 and
capacitance 3 connects capacitance 2 by current-limiting resistance
7, the connection between the emitter of triode 1 and the common of
capacitance 2, diode 2, and capacitance 3 connects the base region
of triode 2, the collector of triode 1 connects the emitter of
triode 2; the emitter of triode 3 connects the power by inductor,
the connection between triode 3 and the inductor connects the
connection between capacitance 1 and parallel diode 2 and
capacitance 3, resistance 6 is in parallel with the collector and
the emitter of triode 2, the connection connects the transformer by
parallel resistance 4 and resistance 5: the anode of silicon
controlled diode connects the connection between emitter of triode
2 and collector of triode 1, the connection between
current-limiting resistance 7 and the cathode of silicon controlled
diode connects transformer.
10. The pellet fuel combustion device according to claim 9, wherein
the said current-limiting resistance comprises multiple parallel
resistances.
Description
TECHNICAL FIELD
[0001] This invention relates to a combustion device and, more
particularly to a pellet fuel combustion device.
BACKGROUND OF THE INVENTION
[0002] Pellet fuel combustion device is a device for burning
biomass pellet fuels. It can burn biomass product made of crop
stalks, straws and leave after being ground and pressed, which
makes full use of all kinds of biomass waste as well as saves
conventional energy. As it were, pellet fuel points a new way for
energy saving and environmental protection.
[0003] The working principle of the pellet fuel combustion device
is that the ignition ignites pellet fuels, and a blower supplys the
combustion chamber with oxygen by blasting air to burn the fuels.
Conventional ignitions heat up pellet fuels to their combustion
temperature and ignite them by the heat produced by resistance
wire. In this way, the power consumption of conventional ignitions
is comparatively large with long ignition time and a lot of
smeek.
SUMMARY OF THE INVENTION
[0004] To solve the problems above, the invention presents a pellet
fuel combustion device with low ignition power, fast ignition speed
but no smeek.
[0005] The technical solution of the invention is a pellet fuel
combustion device comprising
[0006] a combustion chamber, which is used to burn pellet fuels
equipped with a feeding mouth on the sidewall;
[0007] a fuel delivery system, which is used to feed pellet fuels
into the combustion chamber, the output of which connects to the
feeding mouth.
[0008] an electric arc ignition system, which is used to produce
electric arc to burn the pellet fuels delivered into the combustion
chamber through the fuel delivery system.
[0009] Further, the said electric arc ignition system
comprises:
[0010] an electric arc ignition pin, which is used to produce
electric arc by electric energy;
[0011] a power supplying equipment, which is used to supply the
electric arc ignition pin with power.
[0012] The said fuel delivery system further comprises:
[0013] a fuel storage chamber, which is used to store pellet
fuels;
[0014] a fuel feeding pipeline, which connects the fuel storage
chamber with the feeding mouth of combustion chamber to transport
the pellet fuels stored in the fuel storage chamber to the
combustion chamber.
[0015] Further, the said electric arc ignition pin is installed in
the combustion chamber.
[0016] Further, a blowing mouth connected with blowing system is
installed on the sidewall of the said combustion chamber. The said
electric arc ignition pin is installed nearby in front of the
blowing mouth. Electric arc generated by the electric arc ignition
pin is stretched by the wind produced by the blowing system, and
then reaches and ignites the pellet fuels.
[0017] Further, the said blowing mouth is installed beneath the
feeding mouth; a striker plate is arranged between the blowing
mouth and feeding mouth; the said electric arc ignition pin is
installed beneath the striker plate so that the pellet fuels
transported from the feeding mouth to the combustion chamber can
avoid falling onto the electric arc ignition pin directly.
[0018] Wherein the said power supply equipment comprises
high-frequency oscillating circuits and a transformer. The input of
the said high-frequency oscillating circuits connects power source
and the output connects transformer. The output of the said
transformer connects to the electric arc ignition pin.
[0019] Further, the said power supply equipment is arranged on
printed board in an insulating box.
[0020] The advantages of the invention are that it ignites by
electric arc ignition pin which produces high-voltage electric arc,
and the pellet fuels transported through the feeding mouth burn as
soon as they touch the electric arc; electric arc ignition pin
produces high-voltage electric arc the moment the pellet fuel
combustion device starts up, which accelerates igniting speed
greatly and reduces power consumption; furthermore, the fuel
pellets can achieve full burning without bring on smeek. Hence,
this invention has great advantages over conventional ignitions
which produce heat and fire by resistance wire.
BRIEF DESCRIPTION OF DRAWINGS
[0021] The detailed description below refers to the accompanying
drawings, of which:
[0022] FIG. 1 is the structural view of the pellet fuel combustion
device;
[0023] FIG. 2 is the structural view of the combustion chamber;
[0024] FIG. 3 is the structural view of the power feeding
equipment;
[0025] FIG. 4 is the schematic circuit diagram of the power feeding
equipment; and
[0026] FIG. 5 is the right side view of the embodiment of the
invention.
DETAILED DESCRIPTION OF THE INVENTION
[0027] With reference to FIG. 1-2, a pellet fuel combustion device
of this invention comprise
[0028] a combustion chamber (1), which is used to burn pellet fuels
equipped with a feeding mouth (11) on the sidewall;
[0029] a fuel delivery system, which is used to feed pellet fuels
into the combustion chamber (1), the output of which connects to
the feeding mouth (11).
[0030] an electric arc ignition system, which is used to produce
electric arc to burn the pellet fuels delivered into the combustion
chamber (1) through the fuel delivery system.
[0031] As a preferred embodiment, the said electric arc ignition
system comprises
[0032] an electric arc ignition pin (4), which is used to produce
electric electric arc by electric energy;
[0033] a power supply equipment (5), which is used to supply the
electric arc ignition pin (4) with power.
[0034] The said fuel delivery system further comprises:
[0035] a fuel storage chamber (2), which is used to store pellet
fuels;
[0036] a fuel feeding pipeline (3), which connects the fuel storage
chamber (2) with the feeding mouth(11) of combustion chamber (1) to
transport the pellet fuels stored in the fuel storage chamber (2)
to the combustion chamber (1).
[0037] In a preferred embodiment of the invention, the said
electric arc ignition pin (4) is installed in the combustion
chamber (1).
[0038] Further, a blowing mouth (12) connected with blowing system
(6) is installed on the sidewall of the said combustion chamber
(1). The said electric arc ignition pin (4) is installed nearby in
front of the blowing mouth (12). Electric arc generated by the
electric arc ignition pin (4) is stretched by the wind produced by
the blowing system (6), and then reaches and ignites the pellet
fuels in combustion chamber (1).
[0039] Further, the said blowing mouth (12) is installed beneath
the feeding mouth (11); a striker plate (13) is arranged between
the blowing mouth (12) and feeding mouth (11); the said electric
arc ignition pin (4) is installed beneath the striker plate (13) so
that the pellet fuels transported from the feeding mouth to the
combustion chamber can avoid falling onto the electric arc ignition
pin (4) directly, which ensures working security.
[0040] The electric arc ignition pin (4) produces high-voltage
electric arc, and the pellet fuels transported through the feeding
mouth (11) burn as soon as they touch the electric arc; electric
arc ignition pin (4) produces high-voltage electric arc the moment
the pellet fuel combustion device starts up, which accelerates
igniting speed greatly and reduces power consumption; furthermore,
the fuel pellets can achieve full burning without bringing on
smeek. Hence, this invention has great advantages over conventional
ignitions which produce heat and fire by resistance wire.
[0041] The power supply equipment (5) can provide electric arc
ignition pin (4) with power by various means. As a preferred
embodiment of this invention, power supply equipment (5) comprises
high-frequency oscillating circuits (51) and a transformer (52).
The input of the said high-frequency oscillating circuits (51)
connects power source and the output connects transformer (52). The
output of the said transformer (52) connects to the electric arc
ignition pin (4).
[0042] Referring to FIG. 3, the said power supply equipment (5) is
preferably arranged on printed board in an insulating box, so that
the power supply equipment (5) can be installed outside the
combustion chamber (1) or other places with lower temperature to
insure the safety of power supply. For example, an insulating box
made of nylon may be used. It can be installed on the exterior
sidewall of combustion chamber (1). From the power supply equipment
(5) in the insulating box stretch a high-voltage wire (53) which
connects the high-voltage electrode of electric arc ignition pin
(4), a the ground wire (54) which connects the ground electrode of
electric arc ignition pin (4), and a power line (55) which connects
outer power such as 110V or 220V mains electricity. The internal
elements can be chosen according to specific use.
[0043] The high-frequency oscillating circuits (51) wherein can
generate high-frequency AC (alternating current) electric
oscillation, and form high-frequency pulse signal as signal source
for the change of voltage of the transformer (52). This can be used
to select frequency, stablize frequence and protect the circuits of
igniter, which can be realized in many ways. Referring to FIG. 4,
in a preferred embodiment of this invention, the high-frequency
oscillating circuits comprise diode 1(D1), D2; triode 1(T1), T2,
T3; silicon controlled diode D3; capacitance 1(C1), C2, C3;
resistance 1(R1), R2, R3, R4, R5, R6; current-limiting resistance
7(R7) and inductor (L1); L1, C1, C2, C3 together with other
assorted elements generate oscillation amplified by T1 and T2 and
through frequency selected by R7 and D3, then be output to
transformer (52), silicon controlled diode D3 and T1, T2 also
produce feedback. The specific circuits connection is as follows:
the cathode of D1 connects the input of power, the anode connects
parallel R1,C1 and C2, one end of R1 connects D1, the other to the
transformer (52); one end of C1 connects D1, the other to the
cathode of D2; one end of C2 connects D1, the other to the
transformer (52) by R7; C3 is parallel to D2; the anode of D2
connects the control electrode of D3 by R3, the connection between
the anode of D2 and R3 connects the connection between C2 and R7;
the base region of T1 whose emitter connects the common of D2 and
C3 connects C2 by R7, the connection between the emitter of T1 and
the common of C2,D2 and C3 connects the base region of T2, the
collector of T1 connects the emitter of T2; the emitter of T3
connects the power by L1, the connection between T3 and the
inductor connects the connection between C1 and parallel D2 and C3,
R6 is in parallel with the collector and the emitter of T2, the
connection connects the transformer (52) by parallel R4 and R5; the
anode of D3 connects the connection between emitter of T2 and
collector of T1, the connection between R7 and the cathode of D3
connects transformer (52), wherein the said current-limiting
resistance(R7) comprises multiple parallel resistances.
[0044] The high voltage electrode at the output of transformer (52)
connects an electrode on the electric arc ignition pin (4), the
other electrode of which connects the output of the ground wire.
When the igniter is working, the frequency of mains electricity is
converted by high-frequency oscillating circuits (51), the high
voltage generated by transformer (52) is output to electric arc
ignition pin (4) to generate high-voltage electricity.
[0045] Referring to FIG. 1 and FIG. 5, a pellet fuel combustion
device of the invention comprises a fuel storage chamber (2) which
connects to combustion chamber (1) by fuel feeding pipeline (3),
wherein the transportation can be realized by using blower combined
with screw propeller; the blowing system (6) can use the same power
source as fuel feeding pipeline (3) does, such as using blower
power to provide power); power supply equipment (5) in the
insulating box is installed outside of the device where the
temperature is lower, for example, it can be arranged on the
exterior sidewall of combustion chamber (1) ; pellet fuels stored
in storage chamber (2) are transported by fuel feeding pipeline (3)
and injected into combustion chamber (1) through feeding mouth (11)
Meanwhile, power supply equipment (5) converts 5V or 220V mains
electricity into voltage over 100000V which is transported to
electric arc ignition pin (4). As long as the distance between the
two poles of electric arc ignition pin (4) is kept within 8 mm, the
high voltage can generates electric arc. The blowing system (6)
blows wind from the blowing mouth (12) to the electric arc
generated by the electric arc ignition pin (4), and the electric
arc is stretched by the wind to touch the pellet fuels inside the
combustion chamber (1) to make the fuels start burning immediately.
A striker plate (13) is installed between the blowing mouth (12)
and feeding mouth (11), the said electric arc ignition pin (4) is
installed beneath the striker plate (13) to avoid the pellet fuels
falling onto the electric arc ignition pin (4) and ensure working
safety.
[0046] It is sure that this invention is not limited to the
embodiment above, and those that can achieve the same effects as
this invention does by almost the same means should be within the
scope of protection of this invention.
* * * * *