CN108431499B

CN108431499B - Burner device

Info

Publication number: CN108431499B
Application number: CN201680076183.2A
Authority: CN
Inventors: 李在敏; 朴奎进; 朴昌权
Original assignee: Doosan Engine Co Ltd
Current assignee: HSD Engine Co Ltd
Priority date: 2015-12-23
Filing date: 2016-12-20
Publication date: 2020-06-05
Anticipated expiration: 2036-12-20
Also published as: JP6703607B2; JP2018538482A; KR20170075494A; WO2017111430A1; CN108431499A; KR101804024B1

Abstract

The present invention relates to a burner device for raising the temperature of exhaust gas, comprising: an outer housing; an inner casing having one end portion disposed inside the outer casing so as to be spaced apart from the one end portion of the outer casing, and the other end portion supported by the other end portion of the outer casing, and forming a combustion chamber; a porous member disposed between one end of the outer casing and one end of the inner casing; a first support member that supports an inner peripheral surface of the outer housing and an outer peripheral surface of the inner housing at a distance; and a second support member that supports the porous member in a spaced-apart manner from the inner case.

Description

Burner device

Technical Field

The present invention relates to a burner device, and more particularly, to a burner device capable of raising the temperature of exhaust gas.

Background

Generally, a burner device generates a flame by burning fuel in a fuel supply portion and an ignition portion provided inside. The generated flame heats the inflowing exhaust gas. Specifically, a flame is generated in the combustion chamber.

Conventionally, in order to prevent the thermal energy of the flame generated in the combustion chamber from being lost by the temperature outside the burner apparatus, it is necessary to wrap the outside of the burner apparatus with an insulating material. Therefore, there has been a problem that the degree of freedom in the installation space of the burner device and the cost due to the heat insulating material are significantly consumed.

Further, since the exhaust gas flowing into the combustion chamber has a flow that is obstructed when the flame is generated, there is a problem that the flame is generated with a bias by the inflowing exhaust gas. In this case, there is a problem that it is difficult to heat the combustion chamber of the burner device or to efficiently raise the temperature of the exhaust gas.

Disclosure of Invention

Technical problem

Embodiments of the present invention provide a burner apparatus capable of efficiently raising the temperature of exhaust gas.

Technical scheme

According to an embodiment of the present invention, a burner apparatus for warming exhaust gas includes: an outer housing; an inner casing having one end portion disposed inside the outer casing so as to be spaced apart from the one end portion of the outer casing, and the other end portion supported by the other end portion of the outer casing, and forming a combustion chamber; a porous member disposed between one end of the outer casing and one end of the inner casing; a first support member that supports an inner peripheral surface of the outer housing and an outer peripheral surface of the inner housing at a distance; and a second support member that supports the porous member in a spaced-apart manner from the inner case.

Further, the outer case may further include an exhaust gas inflow port formed at the other end portion of the outer case.

Further, the porous member may include: a first porous support portion disposed opposite to one end of the outer case; a second porous support portion supported by the second support member; and a porous portion including a porous region having an inner diameter gradually increasing in a direction from the first porous support portion to the second porous support portion, and a plurality of pores being formed in the porous region.

Further, the exhaust gas flowing into the exhaust gas flow inlet may flow into the combustion chamber toward one end portion of the outer casing through between the outer casing and the inner casing supported by the first support member and through between the porous portion and the inner casing supported by the second support member.

Further, a flow rate of the exhaust gas passing between the porous member and the inner housing may be greater than a flow rate of the exhaust gas passing through the porous portion.

The burner device may further include a fresh air inflow portion connected to one end of the outer casing to guide inflow of fresh air into the combustion chamber.

Further, the above burner apparatus may further include a mixing portion that mixes the fresh air flowing into the combustion chamber and the exhaust gas flowing into the combustion chamber.

Further, the first support member may include a plurality of inner housing supports arranged in a longitudinal direction of the outer housing and radially spaced apart from each other from an inner circumferential surface of the outer housing toward an outer circumferential surface of the inner housing.

Further, the second support member may include a plurality of porous member support portions arranged to be radially spaced from each other from an outer peripheral surface of the porous member toward an inner peripheral surface of the one end portion of the inner housing.

ADVANTAGEOUS EFFECTS OF INVENTION

According to the embodiment of the invention, the burner apparatus can efficiently warm the exhaust gas.

Drawings

Fig. 1 is a diagram showing an internal structure of a burner apparatus according to an embodiment of the present invention.

Fig. 2 is a view showing the porous member of fig. 1.

Fig. 3 is a perspective view illustrating an internal structure of fig. 1.

Fig. 4 is a diagram illustrating the hybrid component of fig. 1.

Fig. 5 is a diagram illustrating a system including fig. 1.

Detailed Description

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings so that those skilled in the art to which the present invention pertains can easily carry out the embodiments. The present invention may be embodied in many different forms and is not limited to the embodiments described herein.

The drawings are schematic and not drawn to scale. Relative dimensions and proportions of parts shown in the figures have been shown exaggerated or reduced in size for the sake of clarity and convenience in the drawings, and any dimensions are exemplary only and not limiting. In addition, the same reference numerals are used for the same structures, elements or components appearing in two or more drawings to represent similar features.

The embodiments of the present invention specifically show desirable embodiments of the present invention. As a result, various variations of the illustration are expected. Therefore, the embodiments are not limited to the specific form of the illustrated region, and include, for example, form variations due to manufacturing.

A burner apparatus 101 according to an embodiment of the present invention will be described with reference to fig. 1 to 4.

As illustrated in fig. 1, a burner apparatus 101 according to an embodiment of the present invention includes an outer housing 100, an inner housing 200 forming a combustion chamber 210, a porous member 300, a first support member 400, and a second support member 500.

The outer casing 100 forms the appearance of the burner apparatus 101. Specifically, the outer case 100 may be formed in a cylindrical shape which is long in one direction and whose inside is formed in a hollow shape.

The inner case 200 is at least partially disposed inside the outer case 100. One end of the inner case 200 is disposed inside the outer case 100 so as to be spaced apart from one end of the outer case 100. In addition, the other end of the inner case 200 is supported by the other end of the outer case 100. The inner housing 200 forms a combustion chamber 210. Specifically, a region of the outer circumferential surface of the inner case 200 and the inner circumferential surface of the outer case 100 are disposed inside the outer case 100 to be spaced apart from each other, and a combustion chamber 210 may be formed inside a region of the inner case 200 to form a flame burned by fuel supplied and an ignition device, not shown.

The porous member 300 is disposed between one end of the outer case 100 and one end of the inner case. Specifically, the porous member 300 may be disposed in front of one end of the inner case 200 spaced apart from one end of the outer case 100.

The first support member 400 supports the inner circumferential surface of the outer case 100 and the outer circumferential surface of the inner case 200 with a space therebetween. That is, the first support member 400 may be supported such that the outer circumferential surface of the inner case 200 is spaced apart from the inner circumferential surface of the outer case 100.

The second support member 500 supports the porous member 300 to be spaced apart from the inner case 200. Specifically, the second support member 500 may be supported such that the other outer circumferential surface of the porous member 300 and the inner circumferential surface of the one end portion of the inner case 200 are spaced apart from each other.

Accordingly, the exhaust gas may be supplied to the combustion chamber 210 through the space partitioned by the first and

second support members

400 and 500 to be warmed.

Furthermore, as illustrated in the aforementioned fig. 1, the outer casing 100 of the burner apparatus 101 of an embodiment of the present invention further comprises an exhaust gas flow inlet 130.

The exhaust gas inflow port 130 may be formed at the other end portion of the outer case 100. Specifically, the outer case 100 may include a first through hole 110, a second through hole 120, and an exhaust gas flow inlet 130.

The first through hole 110 may be formed at one side of the outer case 100. The second through-hole 120 may be formed at the other side of the outer case 100 opposite to the first through-hole 110. Further, the exhaust gas inflow port 130 may be formed at an outer circumferential surface of the other end portion of the outer case 100.

That is, the exhaust gas inlet 130 may be formed on the outer circumferential surface of the outer case 100 and may be formed adjacent to the second through hole 120 with respect to the first through hole 110.

The second through hole 120 may support the other end portion of the inner case 200. Specifically, the discharge port 220 formed at the other end of the inner housing 200 may be inserted into the second through hole 120, and may be supported to protrude outward from the second through hole 120.

That is, one end portion of the inner case 200 may be supported by the first support member 400, and the other end portion of the inner case 200 may be supported by the second through hole 120 of the outer case 100.

Accordingly, the exhaust gas flowing in through the exhaust gas flow inlet 130 may flow into the combustion chamber 210 inside the inner case 200 in a length direction toward one end of the inner case 200.

Further, as illustrated in the foregoing fig. 1 and 2, the porous member 300 of the burner apparatus 101 according to an embodiment of the present invention may include a porous portion 330, and the porous portion 330 includes a first porous support portion 310, a second porous support portion 320, and a porous region formed with a plurality of holes 331.

The first porous support portion 310 may be provided to face one end portion of the outer case 100.

The second porous support portion 320 is supported by the second support member 500. Specifically, the outer circumferential surface of the second porous support portion 320 may be supported by the second support member 500 to be spaced apart from the inner circumferential surface of the one end portion of the inner case 200.

The porous part 330 may be formed between the first and second porous supporting

parts

310 and 320. Further, the porous part 330 may include a porous region having an inner diameter gradually increasing in a direction from the first porous support part 310 toward the second porous support part 320. In addition, a plurality of holes 331 may be formed in the porous region.

Accordingly, the exhaust gas may also flow into the combustion chamber 210 through the porous part 330. In addition, when the exhaust gas passing through the plurality of holes 331 flows into the combustion chamber 210, the flow rate can uniformly flow.

Further, as illustrated in the foregoing fig. 1 and 3, the exhaust gas flowing into the exhaust gas flow inlet 130 of the burner apparatus 101 according to an embodiment of the present invention may flow into the combustion chamber 210 toward one end portion of the outer housing 100 through between the outer housing 100 and the inner housing 200 and through between the porous portion 330 and the porous member 300 and the inner housing 200.

The exhaust gas flowing into the exhaust gas flow inlet 130 may move in a direction toward one end of the outer case 100 by wrapping the outside of the combustion chamber 210 through the first space S1 formed by the outer case 100 and the inner case 200 being spaced apart from each other by the first support member 400.

Further, the exhaust gas moved to the one end portion of the outer case 100 may be supplied to the combustion chamber 210 through the plurality of holes 331 of the porous portion 330 and the second space S2 formed by the second porous support 320 and the inner case 200 being spaced apart from each other by the second support member 500.

Therefore, at the initial stage of the operation of the burner device 101, the temperature of the outside of the combustion chamber 210 can be raised by the temperature of the exhaust gas passing through the first space S1. Further, the heat loss of the exhaust gas heated by the flame of the combustion chamber 210 due to the outside temperature of the outer casing 100 can be reduced by the exhaust gas passing through the first space S1.

In addition, the burner apparatus 101 of the present invention can effectively reduce the cost of wrapping the exterior of the burner apparatus with an insulating material in the past to reduce the heat loss of the burner apparatus by using the exhaust gas passing through the first space S1.

Further, in the exhaust gas flowing in through the exhaust gas flow inlet 130 of the burner apparatus 101 of the present invention, the flow rate of the exhaust gas passing between the porous member 300 and the inner case 200 may be greater than the flow rate of the exhaust gas passing through the porous portion 330.

Of the exhaust gas flowing in through the exhaust gas flow inlet 130, the flow rate of the exhaust gas flowing into the combustion chamber 210 through the second space S2 between the porous member 300 and the inner case 200 may be greater than the flow rate of the exhaust gas flowing into the combustion chamber 210 through the plurality of holes 331 of the porous portion 330.

That is, the exhaust gas flowing into the combustion chamber 210 through the second space S2 may be supplied to the combustion chamber 210 at a relatively fast flow rate. Therefore, such a fast flow rate of exhaust gas enables high-temperature exhaust gas to be efficiently supplied to the combustion chamber 210 while maintaining the temperature.

In addition, the exhaust gas supplied to the combustion chamber 210 through the plurality of holes 331 of the porous portion 330 may be supplied to the combustion chamber 210 in a uniform flow. In addition, even in the case where the flame generated inside the combustion chamber 210 adheres to the porous member 300, the flame and the porous member 300 can be effectively separated from each other by the exhaust gas passing through the plurality of holes 331.

For example, the flow rate of the exhaust gas flowing into the combustion chamber 210 through the second space S2 between the porous member 300 and the inner case 200 may be 15% to 20% more than the flow rate of the exhaust gas flowing into the combustion chamber 210 through the plurality of holes 331 of the porous portion 330.

In addition, as illustrated in fig. 1, the burner apparatus 101 according to an embodiment of the present invention may further include a fresh air inflow portion 600.

The fresh air inflow portion 600 may be connected to one end portion of the outer case 100 to guide the fresh air to flow into the combustion chamber 210. Specifically, the fresh air inflow portion 600 is connected to the side of the outer case 100 where the first through hole 110 is formed of the outer case 100. That is, the fresh air inflow portion 600 may be supported by the first through hole 110. The fresh air flowing into the inside of the combustion chamber 210 through the fresh air inflow portion 600 includes oxygen required for combustion.

Therefore, the flame generated inside the combustion chamber 210 can be functionally stably maintained by the fresh air supplied through the fresh air inflow portion 600.

Furthermore, as illustrated in fig. 1 and 4, the burner apparatus 101 according to an embodiment of the present invention may further include a mixing portion 700.

The mixing portion 700 may mix the fresh air and the exhaust gas flowing into the combustion chamber 210. Specifically, the mixing part 700 may include a mixing support member 710 and a mixing member 720. The mixing support member 710 may rotatably support the mixing member 720. Further, the mixing support member 710 may be disposed between the fresh air inflow portion 600 and the porous member 300.

The mixing element 720 may include a rotating disk 721 and a plurality of wings 722. That is, the rotating disk 721 may be rotatably coupled with the mixing support member 710, and the plurality of wings 722 may be protrusively formed on the rotating disk 721.

Therefore, the rotating disk 721 rotates about the mixing support member 710 by the flow of the fresh air flowing thereinto, and the fresh air and the exhaust gas flowing into the combustion chamber 210 are mixed by the swirler (swirl) formed in the plurality of vanes 722, whereby the exhaust gas can be efficiently combusted.

Further, as illustrated in the foregoing fig. 1 and the foregoing fig. 3, the first support member 400 of an embodiment of the present invention may include a plurality of inner housing support parts 410.

The first support member 400 may be formed along a length direction of the outer case 100. Further, the first support member 400 may include a plurality of inner housing supports 410, and the plurality of inner housing supports 410 may be radially spaced apart from each other from the inner circumferential surface of the outer housing 100 toward the outer circumferential surface of the inner housing 200.

Specifically, one end portion of the first support member 400 may be coupled to an inner circumferential surface of the outer case 100, and the other end portion of the first support member 400 may be in contact with an outer circumferential surface of the inner case 200.

Further, the other end of the first support member 400 may be in line contact or point contact with the inner case 200. For example, the other end portion of the first support member 400 may include a contact surface 411 having a circular shape in cross section.

Therefore, since the first support member 400 is in contact with the inner case 200, even if the inner case 200 is expanded by the flame generated from the combustion chamber 210 formed in the inner case 200, the thermal deformation of the inner case 200 can be effectively supported by the first support member 400 without the thermal deformation of the outer case 100.

That is, when the inner case 200 slides (slip) toward one end of the inner case 200 due to thermal deformation caused by flame generated in the combustion chamber 210, the thermal deformation of the inner case 200 can be effectively supported without deformation of the outer case 100 by the contact surface 411 of the first support member 400.

In addition, the second support member 500 of an embodiment of the present invention may include a plurality of porous member support parts 510.

The second support member 500 may include a plurality of porous member support portions 510, and the plurality of porous member support portions 510 may be radially spaced from each other from an outer circumferential surface of the porous member 300 toward an inner circumferential surface of one end portion of the inner case 200.

The second support members 500 may be disposed radially spaced from each other from the outer circumferential surface of the second porous support portion 320 of the porous member 300 toward the inner circumferential surface of the one end portion of the inner case 200. That is, the second support member 500 may include a plurality of porous member support portions 510, and the plurality of porous member support portions 510 may be radially spaced apart from each other and disposed between the outer circumferential surface of a region of one end portion of the inner case 200 inserted into the second porous support portion 320 of the porous member 300 and the inner case 200.

Specifically, one side of the second support member 500 may be coupled with the second porous support part 320 of the porous member 300, and the other side of the second support member 500 may be in contact with the inner circumferential surface of the inner case 200. Further, the second support member 500 may similarly include the contact surface 411 that the first support member 400 has.

Therefore, even in the case where the porous member 300 is thermally deformed by the flame generated in the combustion chamber 210, the sliding of the porous member 300 supported only by the second support member 500 can be effectively supported by the second support member 500.

That is, since the porous member 300 is supported by the second support member 500 in the structure of the burner apparatus 101, there is no other constraint condition, and therefore, even in the case where sliding due to thermal deformation occurs, the moving porous member 300 can be effectively supported by the second support member 500.

The operation of a system 102 comprising a burner arrangement 101 according to the invention is described below with reference to fig. 1 to 5.

The engine 10 combusts fuel to generate power. At this time, the engine 10 discharges exhaust gas. Exhaust gas discharged from the engine 10 passes through the main exhaust flow path 80 through the turbine 20.

The main exhaust passage 80 is provided with a reactor 60 in which a catalyst capable of purifying nitrogen oxides contained in the exhaust gas is disposed.

Further, a part of the exhaust gas passing through the main exhaust passage 80 in front of the reactor 60 is branched by the branched exhaust passage 70 and is again connected to the main exhaust passage 80 in front of the reactor 60.

The branched exhaust passage 70 may be provided with a blower 30, a burner device 101, a decomposition chamber 40, and an injection member 50.

The blower 30 provides a moving power of the fluid to flow a part of the exhaust gas passing through the main exhaust flow path 80 through the branch exhaust flow path 70. Accordingly, blower 30 may flow exhaust gas into exhaust gas flow inlet 130 of burner apparatus 101.

The exhaust gas flowing into the exhaust gas flow inlet 130 of the burner apparatus 101 passes through the first space S1 between the outer case 100 and the inner case 200. Therefore, the exhaust gas moves along the first space S1 toward the one end of the outer case 100 along the outer circumferential surface of the inner case 200.

The exhaust gas moved to one end portion of the outer case 100 may flow into the combustion chamber 210 through the second space S2 between the porous member 300 and the inner case 200, or flow into the combustion chamber 210 through the porous portions 330 of the porous member 300.

Therefore, the flow of the exhaust gas passing through the porous portion 330 is uniformized, and thus the generation of the flame generated in the combustion chamber 210 at the time of supply may not be inhibited when the exhaust gas is supplied to the combustion chamber 210. Further, the exhaust gas supplied through the second space S2 can be supplied toward the inner wall of the combustion chamber 210 at a relatively fast flow rate, and thus the generation of flames may not be hindered.

The fresh air flowing in through the fresh air inflow portion 600, the exhaust gas supplied to the combustion chamber 210 through the second space S2, and the exhaust gas supplied to the combustion chamber 210 through the porous portion 330 may be mixed by the mixing portion 700.

Therefore, mixing section 700 can mix the exhaust gas with the fresh air so that the temperature of the exhaust gas is effectively raised when combustion chamber 210 is raised in temperature.

The exhaust gas mixed with the fresh air passing through the combustion chamber 210 may be heated by the flame and discharged to the outside of the burner apparatus 101 through the discharge port 220.

The exhaust gas having the increased temperature is supplied to the reducing agent decomposition chamber 40. The decomposition chamber 40 may hydrolyze Urea (Urea) supplied to the heat energy of the warmed exhaust gas.

The hydrolyzed reducing agent may be injected through the injection member 50 onto the main exhaust flow path 80 in front of the reactor 60.

Thus, the exhaust gas flowing into the reactor 60 may be mixed with the hydrolyzed reducing agent.

The exhaust gas including nitrogen oxides may be decomposed into nitrogen and water or water vapor through the reactor 60 through the main exhaust passage 80 at the rear of the reactor, and discharged to the outside.

With such a configuration, the burner device 101 according to the embodiment of the present invention can efficiently raise the temperature of the exhaust gas.

Specifically, in the burner apparatus 101, even if the inner casing 200 is thermally deformed by the flame generated in the combustion chamber 210 formed in the inner casing 200, the inner casing 200 can be effectively supported without affecting the outer casing 100 by the outer casing 100, the inner casing 200, and the first support member 400 supporting the outer casing 100 and the inner casing 200.

Further, since the exhaust gas can move along the outer peripheral surface of the inner casing 200 through the first space S1 by the outer casing 100, the inner casing 200, and the first support member 400 that supports the outer casing 100 and the inner casing 200 in a spaced manner, it is possible to reduce the use of heat insulating materials required to maintain the heat insulation of the combustion chamber as compared with the conventional burner apparatus.

Further, since the exhaust gas passing through the porous member 300 can flow into the combustion chamber 210 with a uniform flow, it is possible to prevent the generation of flame from being hindered by the inflow of the fluid having a non-uniform flow inside the combustion chamber 210.

Although the embodiments of the present invention have been described above with reference to the drawings, it will be understood by those skilled in the art that the present invention may be embodied in other specific forms without changing the technical spirit or essential features of the present invention.

Therefore, the above-described embodiments should be understood as being illustrative in all aspects and not restrictive, the scope of the present invention being described in detail in the following claims, and all changes or modifications derived from the meaning, scope and equivalent concept of the claims should be construed as falling within the scope of the present invention.

Possibility of industrial application

The burner device according to the embodiment of the present invention can be used for raising the temperature of the exhaust gas.

Description of the symbols

100: outer case, 101: burner apparatus, 102: system comprising a burner device, 130: exhaust gas inflow port, 200: inner housing, 210: combustion chamber, 300: porous member, 310: first porous support portion, 320: second porous support portion, 330: porous portion, 331: a plurality of pores, 400: first support member, 410: multiple inner housing supports, 500: second support member, 510: multiple porous member support portions, 600: fresh air inflow portion, 700: a mixing section.

Claims

1. A burner apparatus that warms up exhaust gas, the burner apparatus comprising:

an outer housing;

an inner casing having one end portion disposed inside the outer casing so as to be spaced apart from the one end portion of the outer casing, and the other end portion supported by the other end portion of the outer casing, and forming a combustion chamber;

a porous member disposed between one end of the outer casing and one end of the inner casing;

a first support member including a plurality of inner casing support portions arranged radially to be spaced from each other toward an outer peripheral surface of the inner casing, the first support member supporting an inner peripheral surface of the outer casing and an outer peripheral surface of the inner casing at a distance, and the first support member being in line contact or point contact with the inner casing to support thermal deformation of the inner casing in a longitudinal direction of the inner casing due to a flame generated in the combustion chamber; and

a second support member including a plurality of porous member support portions arranged radially to be spaced from each other toward an outer periphery of the porous member, the second support member supporting the porous member to be spaced from the inner casing, and the second support member being in line contact or point contact with the porous member to support thermal deformation of the porous member in a longitudinal direction of the inner casing due to flame generated in the combustion chamber,

the porous member includes:

a first porous support portion disposed opposite to one end of the outer case;

a second porous support part, at least a part of which is inserted into the inner casing and supported by the second support member; and

a porous portion including a porous region having an inner diameter gradually increasing in a direction from the first porous support portion to the second porous support portion, and a plurality of pores being formed in the porous region.

2. The burner apparatus of claim 1,

the outer housing further includes an exhaust gas inflow port formed at the other end portion of the outer housing.

3. The burner apparatus of claim 2,

the exhaust gas flowing into the exhaust gas inlet flows into the combustion chamber through between the outer casing and the inner casing supported by the first support member toward one end portion of the outer casing, and through between the porous portion and the inner casing supported by the second support member.

4. The burner apparatus of claim 3,

the flow rate of the exhaust gas passing between the porous member and the inner housing is larger than the flow rate of the exhaust gas passing through the porous portion.

5. The burner apparatus of claim 3,

and a fresh air inflow portion connected to one end of the outer casing to guide inflow of fresh air into the combustion chamber.

6. The burner apparatus of claim 5,

the combustor further includes a mixing section that mixes the fresh air flowing into the combustion chamber and the exhaust gas flowing into the combustion chamber.

7. The burner apparatus of claim 1,

the plurality of inner case supporting portions are arranged along a longitudinal direction of the outer case.