KR101501260B1 - Evaporator and burner using the same - Google Patents

Abstract

The present invention is to provide an evaporator which performs cracking and evaporation of liquid (fuel) at the same time. The evaporator according to an embodiment of the present invention comprises: a first tube expanding unit introducing discharge gas; a second tube expanding unit supplying a mixer of atomized liquid to the discharge gas; a neck unit grounded by connecting the first expanding unit and the second expanding unit through a minimum passage; an electrode generating an arc with voltage applied by forming a discharge gap between the neck unit and the electrode; and a nozzle atomizing by supplying liquid to an arc jet by the arc as installed in the neck unit.

Description

FIELD OF THE INVENTION [0001] The present invention relates to an evaporator,

The present invention relates to an evaporator using an arc jet and a combustion apparatus using the evaporator.

Generally, a plasma burner is provided with an electrode inside a housing, and a gap is formed between the housing and the electrode, and a high voltage is applied to generate a plasma from a gap between the discharge gas and the fuel.

In the case of using a generator with a discharger sieve, a compressor is used to supply the generator into the inside of the plasma burner. In addition, a structure for rotating and supplying the fuel is required for uniform mixing of the fuel with the fresh fuel.

As described above, the use of the compressor increases the price of the plasma burner, and the structure of the plasma burner can be complicated due to the rotation supply of the fuel.

In addition, in the case of using exhaust gas while eliminating the wearing-in, the stable operation region of the plasma burner is reduced. Since the exhaust gas is used, the structure of the plasma burner can be complicated.

An object of the present invention is to provide an evaporator which simultaneously performs evaporation and cracking of a liquid (fuel). It is also an object of the present invention to provide a combustion apparatus using an evaporator.

According to an aspect of the present invention, there is provided an evaporator comprising: a first expanding part for introducing a discharge gas; a second expanding part for supplying a mixer of liquid atomized to the discharge gas; An electrode for generating an arc at a voltage applied by forming a discharge gap with the neck portion and a nozzle for supplying liquid to the arc jet by the arc to atomize the arc jet, .

The first bulging portion may be connected to the neck portion by forming a first passage gradually tapered toward the neck portion.

The second bendable portion may be connected to the neck portion by forming a second passage that is gradually widened away from the neck portion.

The inner diameter of the second expanded portion may be larger than the inner diameter of the first expanded portion.

The evaporator according to an embodiment of the present invention may be configured to receive the first expanded portion and the second expanded portion, supply a part of the discharge gas into the first expanded portion, and transfer the remainder to the outside of the first expanded portion And may further include a receiving tube for supplying the water.

The second bendable portion may include a first discharge gas hole formed to further supply a part of the discharge gas supplied to the outside of the first bendable portion to the inside of the second bendable portion.

The nozzles may be disposed in the neck portion in a single or plural numbers, and may inject fuel.

According to an embodiment of the present invention, there is provided an evaporator comprising a first expansion unit for introducing a first discharge gas, a second expansion unit for supplying a liquid mixture of the liquid atomized to the first discharge gas, An electrode for generating an arc by a voltage applied by forming a discharge gap between the neck portion and the neck portion by connecting the two expansion portions by a minimum path, a liquid provided to the arc jet by the arc, And a second expanding portion for supplying the second discharging gas to the outside of the first expanding portion, and a part of the second discharging gas is supplied to the inside of the second expanding portion And the like.

The first expanding portion includes a first passage formed to be gradually narrowed toward the neck portion and connected to the neck portion and an inlet passage formed to be gradually widened from the supply side of the first discharge gas toward the first passage side .

A combustion apparatus according to an embodiment of the present invention includes a first expansion unit and a second expansion unit for introducing a discharge gas into a throat of a minimum passage and generating an arc jet between the electrode and the throat, An evaporator for injecting fuel into the arc jet through a nozzle to atomize the fuel into the discharge gas, and an evaporator for supplying a part of the discharge gas to the inside of the first expansion unit, And the like.

The combustion apparatus according to an embodiment of the present invention may further include a combustion chamber connected to the receiving tube.

The combustion apparatus according to an embodiment of the present invention may further include an igniter provided in front of the second expansion portion of the evaporator.

The receiving tube is formed as an exhaust pipe of an automobile, and the discharging gas may be an exhaust gas.

The second bulging portion may include a first discharge gas hole formed to additionally supply a part of the exhaust gas supplied to the outside of the receiving tube to the inside of the second bulging portion.

The combustion apparatus according to an embodiment of the present invention may further include an igniter provided in the second expansion portion.

The combustion apparatus according to an embodiment of the present invention may further include a third expansion unit disposed in front of the second expansion unit and spaced apart from the second expansion unit by a larger diameter.

The third expansion portion may include a second discharge gas hole formed to be larger than the first discharge gas hole and configured to additionally supply a part of the exhaust gas supplied to the inside of the storage tube to the inside of the third expansion portion .

The receiving tube may further include an oxidation catalyst disposed behind the evaporator.

The combustion apparatus according to an embodiment of the present invention may further include a second nozzle installed in the second bulging portion, and an igniter provided between the nozzle and the second nozzle.

The combustion apparatus according to an embodiment of the present invention may further include a second nozzle installed at the second bending portion, an igniter provided between the nozzle and the second nozzle, and an igniter provided at the front of the second bending portion, And a third expanding portion spaced apart from the tube by a larger diameter than the tube portion.

As described above, according to one embodiment of the present invention, arc jet is generated by arc and arc from the neck portion between the first and second bulging portions to the discharge body, so that evaporation and cracking of the liquid (fuel) The liquid (fuel) can be quickly atomized in the discharge gas.

1 is a sectional view of an evaporator according to a first embodiment of the present invention.
2 is a sectional view of an evaporator according to a second embodiment of the present invention.
3 is a cross-sectional view of a combustion apparatus according to a third embodiment of the present invention to which an evaporator main portion of the first embodiment is applied.
4 is a cross-sectional view of a combustion apparatus according to a fourth embodiment of the present invention to which an evaporator main portion of the second embodiment is applied.
5 is a cross-sectional view of a combustion apparatus according to a fifth embodiment of the present invention to which an evaporator main portion of the second embodiment is applied.
6 is a cross-sectional view of an evaporator according to a sixth embodiment of the present invention.
7 is a cross-sectional view of a combustion apparatus according to a seventh embodiment of the present invention to which an evaporator main portion of the second embodiment is applied.
8 is a cross-sectional view of a combustion apparatus according to an eighth embodiment of the present invention to which an evaporator main portion of the second embodiment is applied.
9 is a cross-sectional view of a combustion apparatus according to a ninth embodiment of the present invention to which an evaporator main portion of the second embodiment is applied.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art can easily carry out the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. In order to clearly illustrate the present invention, parts not related to the description are omitted, and the same or similar components are denoted by the same reference numerals throughout the specification.

1 is a sectional view of an evaporator according to a first embodiment of the present invention. Referring to Fig. 1, the evaporator 1 of the first embodiment includes a first expansion portion 10, a second expansion portion 20, a throat portion 30, an electrode 40, and a nozzle 50.

The first expansion portion 10 introduces the discharge gas to one side and guides the discharge gas to the throat portion 30. For example, the first expanding portion 10 is connected to the neck portion 30 by forming a first passage 11 gradually narrowing from the inlet to the neck 30 side. The discharge gas may be an external air (air) or an automobile exhaust gas.

The second expansion portion 20 discharges and supplies the liquid mixture of the liquid atomized to the discharge gas in the throat portion 30. For example, the second expansion portion 20 is connected to the neck portion 30 by forming a second passage 21 that is gradually widened away from the neck portion 30 side.

At this time, the inner diameter D2 of the second expanded portion 20 may be formed to be larger than the inner diameter D1 of the first expanded portion 10. Due to this, the liquid can smoothly be atomized in the second expanded portion 20 by the arc jet of the discharge gas passing through the neck portion 30, and can be uniformly mixed with the discharge gas.

The neck portion 30 connects the first and second expansion portions 10 and 20 with a minimum path, and is electrically grounded. For example, the neck portion 30 is connected to the minimum diameter portion of each of the first passage 11 and the second passage 21, so that the neck portion 30 is provided between the first and second expanding portions 10 and 20, So as to increase the flow velocity of the discharge gas flowing from the first expanded portion 10 to the second expanded portion 20.

The electrode 40 is formed in the first expanded portion 10 so as to form a discharge gap G with the neck 30 connected to the first passage 11 to generate an arc with a voltage HV applied thereto . An arc is generated in the discharge gap G when a high voltage is applied to the electrode 40 while passing the discharge gas through the neck 30 in a state where the neck 30 is grounded.

The arc contacts the neck 30 to release heat and heats the neck 30 area by an arc. Thereafter, the flow rate of the discharge gas at the neck portion 30 is accelerated. Therefore, the arc jet in the excited state due to the arc and heat is injected into the second expansion portion 20.

The nozzle 50 may be provided in the neck 30 to atomize the liquid into the discharge gas by supplying liquid (fuel) to the arc jet. The liquid atomized in the discharge gas forms a mixer and is injected into the second expansion part (20) by arc jet. At this time, the liquid can be atomized at a high rate by the heat of the arc and flow excited species and mixed into the discharge gas.

Arcjet evaporates and cracks the liquid, eliminating the need to rotate it as in conventional plasma burners when supplying liquid, and enables operation at low power conditions. And the structure of the evaporator is simple, and the evaporator can be used as the igniter of the burner.

Various embodiments of the present invention will be described below. Description of the same configuration as the first embodiment and the previously described embodiment will be omitted.

2 is a sectional view of an evaporator 2 according to a second embodiment of the present invention. 2, the evaporator 2 of the second embodiment further includes a receiving tube 60 in the evaporator 1 of the first embodiment, and a first discharge gas hole H1 is formed in the second tube portion 220, Respectively.

The accommodating tube 60 accommodates the first and second expansion parts 10 and 220 and supplies a part of the discharge gas to the inside of the first expansion part 10 and the remainder is supplied to the first expansion part 10 As shown in Fig.

A part of the discharge gas passing through the outside of the first expansion portion 10 is further supplied to the inside of the second expansion portion 220 through the first discharge gas hole H1.

The nozzles 250 are disposed in the neck portion 30 in a single or plural numbers, and are formed of fuel injection nozzles that inject fuel. Therefore, the evaporator 2 of the second embodiment can be effectively applied to an industrial burner.

When the evaporator 2 is used for an industrial burner, a discharge gas which is supplied to the inside of the second expansion portion 220 through the first discharge gas hole H1 via the outside of the first expansion portion 10 Can be further mixed with the fuel injected from the nozzle 250 and atomized by the arc jet. Therefore, the discharge gas supplied to the first discharge gas hole H1 makes it possible to sufficiently burn the fuel.

3 is a cross-sectional view of a combustion apparatus according to a third embodiment of the present invention to which an evaporator main portion of the first embodiment is applied. Referring to Fig. 3, the combustion apparatus 3 of the third embodiment includes the evaporator 1 of the first embodiment, the receiving tube 60 of the evaporator 2 of the second embodiment, and the combustion chamber 70. That is, the receiving tube 60 of the evaporator 2 of the second embodiment is connected to the combustion chamber 70, and supplies a mixture of the discharge gas and the fuel by the arc and arc jet to the combustion chamber 70.

An arc is generated in the discharge gap G when a high voltage is applied to the electrode 40 while passing the discharge gas through the neck 30 in a state where the neck 30 is grounded. The arc contacts the neck 30 to release heat and heats the neck 30 area by an arc. Thereafter, the flow rate of the discharge gas at the neck portion 30 is accelerated. The arc jet in the excited state due to the arc and heat is injected into the second expanded portion 20.

The nozzle 350 may be installed in the neck 30 to atomize the fuel into the discharge gas by supplying fuel to the arc jet. The fuel atomized in the discharge gas forms a mixer and is injected into the second expansion part 20 by the arc jet. At this time, the fuel can be atomized at high speed by the heat of the arc and the flow excited species and mixed into the discharge gas.

The combustion apparatus 3 of the third embodiment may further include an igniter 80 in front of the second expansion portion 20 of the evaporator 2. The igniter 80 allows ignition of the fuel atomized in the discharge gas to be combusted in the combustion chamber 70.

In the case of such an industrial combustion device 3, vaporizing the liquid fuel and mixing with the discharge gas (oxidizer or air) is an important factor determining the performance and size of the combustion device 3. [

Since the combustion apparatus 3 of the third embodiment is used as a device for atomizing the liquid fuel in the arc jet, rapid atomization of fuel and mixing with air can be obtained which can not be obtained in conventional diesel burners. Therefore, the generation of nitrogen oxides (NOx) can be suppressed by removing hot spots in the combustion region.

Arc and arc jet can be generated by applying alternating current (AC) or direct current (DC) to the electrode (40). When a DC power source is used as compared with AC, the liquid fuel does not coagulate due to the charging phenomenon of the atomized fuel droplet during the arc jet, and can be finely and quickly atomized.

4 is a cross-sectional view of a combustion apparatus according to a fourth embodiment of the present invention to which an evaporator main portion of the second embodiment is applied. Referring to Fig. 4, the combustion apparatus 4 of the fourth embodiment is formed by replacing the receiving pipe 260 with the exhaust pipe of an automobile in the evaporator 2 of the second embodiment. That is, the receiving pipe 260 is formed as an exhaust pipe of an automobile, so that the discharge gas is exhaust gas.

Therefore, the first discharge gas hole H21 of the second expansion unit 220 further supplies a part of the exhaust gas supplied to the outside of the first expansion unit 10 to the interior of the second expansion unit 220. [ The exhaust gas further supplied to the inside of the second expanded portion 220 through the first exhaust gas hole H21 via the outside of the first expanded portion 10 is injected from the nozzle 250 and atomized by the arc jet And can be further mixed with the fuel. Therefore, the exhaust gas supplied to the first discharge gas hole H21 can sufficiently burn the fuel.

Further, the igniter 80 may be provided in the second bulging portion 220. The igniter 80 allows ignition of the fuel atomized in the exhaust gas so as to be combusted in the second expanded portion 220.

5 is a cross-sectional view of a combustion apparatus according to a fifth embodiment of the present invention to which an evaporator main portion of the second embodiment is applied. The combustion apparatus 5 of the fifth embodiment is formed by further including a third expansion unit 320 in the combustion apparatus 4 of the fourth embodiment.

The third tube portion 320 is spaced apart from the second tube portion 220 by a larger diameter than the second tube portion 220. The third expansion portion 320 has a second discharge gas hole H2 that is larger than the first discharge gas hole H21.

The second discharge gas hole (H2) further supplies a part of the exhaust gas supplied to the inside of the receiving pipe (260) to the inside of the third bending part (320) disposed in front of the second bending part (220).

The exhaust gas further supplied to the inside of the third expansion portion 320 via the outside of the first and second expansion portions 10 and 220 and through the second discharge gas hole H2 is injected from the nozzle 250 Can be further mixed with the fuel atomized by the arc jet. Therefore, the exhaust gas supplied to the second discharge gas hole H2 can sufficiently burn the fuel.

That is, the third bulge portion 320 can be used when additional bolting is required in front of the second bulge portion 220.

6 is a cross-sectional view of an evaporator according to a sixth embodiment of the present invention. Referring to FIG. 6, the evaporator 6 according to the sixth embodiment is formed by modifying the first expansion portion 10 of the evaporator 2 of the second embodiment.

In the evaporator 6 of the sixth embodiment, the first expanded portion 610 introduces the first discharge gas. The first discharge gas may be an external load. The accommodating tube 60 accommodates the first expanding tube portion 610 and the second expanding tube portion 220 and supplies the second discharge gas to the outside of the first expanding tube portion 610 to form the first discharge gas hole H21 To the inside of the second bulging portion 220. The second bulging portion 220 is a part of the second discharge tube.

For example, the first expanding portion 610 may include a first passage 611 formed to be gradually narrowed toward the neck portion 630 side and connected to the neck portion 630, and a first passage 611 connected to the first discharge gas supply side And an inlet passage 612 formed to be gradually widened toward the side of the inlet passage 612.

7 is a cross-sectional view of a combustion apparatus according to a seventh embodiment of the present invention to which an evaporator main portion of the second embodiment is applied. 7, the combustion apparatus 7 according to the seventh embodiment is the same as the combustion apparatus 4 according to the fourth embodiment except that the igniter 80 is removed from the combustion apparatus 4 of the fourth embodiment and an oxidation catalyst 81 is installed in the receiving tube 260 do.

That is, the oxidation catalyst 81 is installed at the rear of the evaporator, that is, the second expansion portion 220, in the receiving tube 260. The fuel having improved atomization characteristics in the evaporator can be burned stably and effectively on the oxidation catalyst 81. [

8 is a cross-sectional view of a combustion apparatus according to an eighth embodiment of the present invention to which an evaporator main portion of the second embodiment is applied. Referring to Fig. 8, the combustion apparatus 8 according to the eighth embodiment is formed by changing the arrangement of the nozzles 250 and installing the igniter 80 in the combustion apparatus 7 of the seventh embodiment.

That is, in the combustion apparatus 8 according to the eighth embodiment, the nozzle 250 is installed on the neck 30, the second nozzle 252 is installed on the second expansion part 220, and the igniter 80 And is installed in the second expansion part 220 between the nozzle 250 and the second nozzle 252.

Accordingly, the fuel injected from the nozzle 250 is mixed with the exhaust gas in the second bulging portion 220 to form the primary flame F1. Since the fuel injected through the second nozzle 252 is injected into the high-temperature region of the primary flame F1, a large amount of fuel can be stably atomized and mixed with the exhaust gas.

9 is a cross-sectional view of a combustion apparatus according to a ninth embodiment of the present invention to which an evaporator main portion of the second embodiment is applied. Referring to Fig. 9, the combustion device 9 according to the ninth embodiment is formed by changing the arrangement of the nozzles 250 in the combustion device 5 of the fifth embodiment.

That is, in the combustion apparatus 9 according to the ninth embodiment, the nozzle 250 is installed on the neck 30, the second nozzle 252 is installed on the second expansion part 220, and the igniter 80 And is installed in the second expansion part 220 between the nozzle 250 and the second nozzle 252. The third tube portion 320 is spaced apart from the second tube portion 220 by a larger diameter than the second tube portion 220.

As in the combustion apparatus 8 of the eighth embodiment, the fuel injected from the second nozzle 252 is supplied to the exhaust gas flowing into the second discharge gas hole H2 of the third bulging portion 320, F1). Therefore, the fuel injected from the nozzles 250 and the second nozzles 252 can be effectively burned even in the absence of the oxidation catalyst.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, And it goes without saying that the invention belongs to the scope of the invention.

1, 2, 6: Evaporator 3, 4, 5, 7, 8, 9: Combustion device
10, 610: first expansion portion 11, 611: first passage
20, 220: second expansion portion 21: second passage
30: neck 40: electrode
50, 250, 350: nozzle 60, 260:
70: combustion chamber 80: igniter
81: oxidation catalyst 252: second nozzle
320: third expansion portion 612: inlet passage
D1, D2: Inner diameter F1, F2: 1st, 2nd flame
G: discharge gap H1, H21: first discharge gas hole
H2: second discharge gas hole

Claims (20)

A first expansion unit for introducing the discharge gas;
A second expansion unit for supplying a mist of liquid atomized to the discharge gas;
A neck portion which is grounded by connecting the first expanding portion and the second expanding portion with a minimum path;
An electrode which forms a discharge gap with the neck portion and generates an arc by a voltage to be applied; And
A nozzle provided in the neck portion for supplying liquid to the arc jet by the arc to atomize the arc jet,
≪ / RTI >
The method according to claim 1,
Wherein the first expanding portion comprises:
And a first passage which becomes gradually narrower toward the neck portion is formed and connected to the neck portion.
3. The method of claim 2,
Wherein the second expanding portion comprises:
And a second passage that is gradually widened away from the neck portion is formed and connected to the neck portion.
The method according to claim 1,
And an inner diameter of the second expanded portion is larger than an inner diameter of the first expanded portion.
The method according to claim 1,
And an accommodation pipe accommodating the first and second expansion parts and supplying a part of the discharge gas into the first expansion part and supplying the rest to the outside of the first expansion part.
6. The method of claim 5,
Wherein the second expanding portion comprises:
And a first discharge gas hole formed to further supply a part of the discharge gas supplied to the outside of the first expanded portion to the inside of the second expanded portion.
The method according to claim 6,
The nozzle
And a plurality of fuel injection nozzles disposed in the neck portion for injecting fuel.
A first expansion unit for introducing the first discharge gas;
A second expansion unit for supplying a liquid mixture of atomized liquid to the first discharge gas;
A neck portion which is grounded by connecting the first expanding portion and the second expanding portion with a minimum path;
An electrode which forms a discharge gap with the neck portion and generates an arc by a voltage to be applied;
A nozzle installed on the neck to atomize the arc jet by supplying the liquid to the arc jet by the arc; And
A second expansion tube for supplying a portion of the second discharge gas to the inside of the second expansion tube, and a second expansion tube for supplying the second discharge gas to the outside of the first expansion tube,
≪ / RTI >
9. The method of claim 8,
Wherein the first expanding portion comprises:
A first passage formed to become gradually narrower toward the neck portion and connected to the neck portion, and
An inlet passage formed to be gradually wider from the supply side of the first discharge gas to the first passage side,
/ RTI >
A first expanding portion and a second expanding portion for introducing a discharge gas are connected to a neck portion of a minimum passage, an arc jet is generated between the electrode and the neck portion, the fuel is injected to the arc jet through a nozzle provided in the neck portion, An evaporator for atomizing the fuel in the discharge gas; And
And a discharge pipe for receiving the evaporator and supplying a part of the discharge gas to the inside of the first expansion unit and supplying the remainder to the outside of the first expansion unit
.
11. The method of claim 10,
And the combustion chamber
Further comprising:
11. The method of claim 10,
And an igniter provided in front of the second expanded portion of the evaporator.
11. The method of claim 10,
The receiving tube is formed as an exhaust pipe of an automobile,
Wherein the discharge gas is an exhaust gas.
14. The method of claim 13,
Wherein the second expanding portion comprises:
And a first discharge gas hole formed to further supply a part of the exhaust gas supplied to the outside of the receiving tube to the inside of the second bending portion.
14. The method of claim 13,
And an igniter provided in the second expansion portion.
15. The method of claim 14,
And a third expanding portion disposed in front of the second expanding portion and spaced apart from the second expanding portion by a larger diameter than the second expanding portion.
17. The method of claim 16,
The third expansion portion
And a second discharge gas hole formed to be larger than the first discharge gas hole and configured to additionally supply a part of the exhaust gas supplied to the inside of the receiving tube to the inside of the third bending portion.
14. The method of claim 13,
Wherein the receiving tube comprises:
Further comprising an oxidation catalyst disposed behind the evaporator.
19. The method of claim 18,
A second nozzle installed in the second bending portion, and
And an igniter provided between the nozzle and the second nozzle
Further comprising:
11. The method of claim 10,
A second nozzle provided in the second bending portion,
An igniter provided between the nozzle and the second nozzle, and
And a third expanding portion disposed in front of the second expanding portion and spaced apart from the second expanding portion by a larger diameter than the second expanding portion.

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