KR101622178B1 - Air-heater using gaseous fuel having injector having cooling pin - Google Patents

Air-heater using gaseous fuel having injector having cooling pin Download PDF

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Publication number
KR101622178B1
KR101622178B1 KR1020160025807A KR20160025807A KR101622178B1 KR 101622178 B1 KR101622178 B1 KR 101622178B1 KR 1020160025807 A KR1020160025807 A KR 1020160025807A KR 20160025807 A KR20160025807 A KR 20160025807A KR 101622178 B1 KR101622178 B1 KR 101622178B1
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KR
South Korea
Prior art keywords
air
injector
cooling
mixing head
width
Prior art date
Application number
KR1020160025807A
Other languages
Korean (ko)
Inventor
이정민
나재정
Original Assignee
국방과학연구소
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Publication date
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Priority to KR1020160025807A priority Critical patent/KR101622178B1/en
Application granted granted Critical
Publication of KR101622178B1 publication Critical patent/KR101622178B1/en

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H3/00—Air heaters
    • F24H3/006—Air heaters using fluid fuel
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23L—SUPPLYING AIR OR NON-COMBUSTIBLE LIQUIDS OR GASES TO COMBUSTION APPARATUS IN GENERAL ; VALVES OR DAMPERS SPECIALLY ADAPTED FOR CONTROLLING AIR SUPPLY OR DRAUGHT IN COMBUSTION APPARATUS; INDUCING DRAUGHT IN COMBUSTION APPARATUS; TOPS FOR CHIMNEYS OR VENTILATING SHAFTS; TERMINALS FOR FLUES
    • F23L7/00—Supplying non-combustible liquids or gases, other than air, to the fire, e.g. oxygen, steam
    • F23L7/007—Supplying oxygen or oxygen-enriched air
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H3/00—Air heaters
    • F24H3/02—Air heaters with forced circulation
    • F24H3/04—Air heaters with forced circulation the air being in direct contact with the heating medium, e.g. electric heating element
    • F24H3/0488—Air heaters with forced circulation the air being in direct contact with the heating medium, e.g. electric heating element using fluid fuel
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H9/00—Details
    • F24H9/20—Arrangement or mounting of control or safety devices
    • F24H9/2064—Arrangement or mounting of control or safety devices for air heaters
    • F24H9/2085—Arrangement or mounting of control or safety devices for air heaters using fluid fuel

Abstract

The air heater according to the present invention includes a cooling fin formed along an outer circumferential surface of an oxidant injector to form a cooling region of air moving by a hole.
The injector is supported by the first cooling fin so as to be spaced apart from the inner surface of the hole, and a cooling region is formed around the injector by the second cooling fin. Therefore, the injector can be protected from the high temperature of the combustion gas and the cooling characteristic can be improved.

Description

[0001] The present invention relates to an air-warming apparatus,

The present invention relates to an air heat exchanger including a structure for cooling an injector for supplying high-temperature air.

Air is designed to supply air at high temperature and pressure to the air intake system using heat of combustion gases such as methane, natural gas, hydrogen, and gaseous fuels. Air heat is used to simulate high temperature air. It should contain 20% of unburned oxygen in the combustion gas, and it is preferable to use the combustion gas mixed with air to the minimum.

If the supply condition must satisfy various temperature and flow conditions, it must have a very complicated structure and it should have different types of air heaters separately according to the conditions.

Such an air-heated injector discharges a high-temperature combustion gas, and if it is driven for a long time, the thermal durability of the injector deteriorates due to the heat flowing into the injector from conduction and radiation from the flame of about 3000 ° C. and the safety of the test apparatus is impaired .

Generally, the injector can be expected to have a cooling effect by the air distribution flowing into the peripheral region of the injector in a shape protruding from the mixing head surface. However, since the air flowing between the mixing head surface and the injector easily escapes into the ambient atmosphere, relatively cold air can not reach the end of the injector. Therefore, the cooling effect of the injector is deteriorated.

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide an injector having a cooling structure for improving the cooling effect.

In order to accomplish the above object, according to the present invention, there is provided an air cleaner comprising: an air block formed to allow air to be introduced into the space; an ignition part for initial ignition of the air; A mixing head surface including a hole formed in the air block so that the air is discharged to the ignition portion; a mixing head portion extending in one direction and configured to supply an oxidizing agent to the ignition portion, A first cooling fin supporting the oxidant injector from one area of the mixing head surface forming the hole and a plurality of cooling holes disposed on the outer circumferential surface of the oxidant injector exposed to the outside of the mixing head surface to form a cooling space, And a second cooling fin.

In one embodiment of the present invention, the first and second cooling fins are formed to have the same width, and may protrude from the outer circumferential surface of the oxidant injector.

As an example related to the present invention, the first and second cooling fins may have the same width and may be integrally formed.

In one embodiment of the present invention, the first cooling fin has a first width, and the second cooling fin has a second width larger than the first width.

In one embodiment of the present invention, one end of the second cooling fin may overlap the mixing head surface.

As an example related to the present invention, it may further include a bushing fixed to the inner circumferential surface of the hole and equipped with the first and second wings.

As an example related to the present invention, the first wing portion protrudes from the inner circumferential surface of the bushing, and the second wing portion can be mounted to the end portion of the bushing.

According to an embodiment of the present invention, the width of the second wing portion may be larger than the width of the first wing portion.

As an example related to the present invention, the bushing may be coupled to the hole by a welding method or by a screw assembly method.

According to the present invention configured as described above, since the air moves along the cooling region surrounded by the plurality of cooling fins, heat is absorbed from the outer peripheral surface of the oxidant injector, so that the cooling effect can be improved.

Further, since the air absorbs heat generated from the fins, the flame can be quickly mixed with a uniform temperature.

Further, in order to stably fix the oxidant injector in the hole, an additional fixing structure may not be formed on the mixing head surface, so that the processing step of the mixing head surface can be reduced.

In addition, when the bushing including the first and second cooling fins is mounted on the injector for oxidation, there is no need to form cooling fins directly on the oxidizer injector and can be implemented in a detachable structure, so that it can be used in a wide flow rate range.

FIG. 1A is a cross-sectional view of an air heater according to an embodiment of the present invention. FIG.
1B is a longitudinal sectional view for explaining an assembling aspect of a mixing head surface and a combustor injector and an oxidizer injector.
FIGS. 2A and 2B are conceptual diagrams illustrating one oxidant injector to explain a cooling fin structure according to an embodiment of the present invention. FIG.
3A to 3B are conceptual diagrams illustrating an oxidizer injector including a cooling fin according to another embodiment.
4A and 4B are conceptual diagrams for explaining an oxidizer injector having cooling pins according to still another embodiment.
5A is a conceptual view for explaining the structure of a bushing including first and second cooling fins.
5B is a conceptual view of the bushing of FIG.
5C is a conceptual view of the bushing of FIG.

Hereinafter, air heating related to the present invention will be described in more detail with reference to the drawings. In the present specification, the same or similar reference numerals are given to different embodiments in the same or similar configurations. As used herein, the singular forms "a", "an" and "the" include plural referents unless the context clearly dictates otherwise.

FIG. 1A is a cross-sectional view of an air heater according to an embodiment of the present invention. FIG. The air heater 1000 includes a fuel block 100, an oxidizer block 200, an air block 300, an ignition part 400, a mixing head surface 500, a combustion part 600 and an air inflow part 700, .

The fuel block 100, the oxidizer block 200, and the air block 300 may be sequentially connected along one direction and may be detachably coupled to each other.

Inside the fuel block 100, a fuel flow path 110 for supplying fuel is formed inside the fuel block 100.

A fuel injector 210 is mounted in the fuel block 100 to supply the fuel to the ignition part 400. The fuel injector 210 is formed to communicate with the fuel passage 110 to form a passage through which the fuel is moved. The other end of the fuel injector 210 is formed to reach the ignition part 400. That is, the fuel injector 210 extends from the fuel block 100 to pass through the oxidizer block 200 and the air block 300.

The oxidizer block 200 is equipped with an oxidizer injector 310 for providing an oxidant to the igniter 400. The oxidant injector 310 extends in one direction, and one end of the oxidant injector 310 is formed to reach the ignition part 400. That is, the oxidant injector 310 extends from the oxidizer block 200 and penetrates the air block 300 to reach the ignition part 400.

The mixing head surface 500 is mounted on one side of the air block 300 facing the ignition portion 400. The mixing head surface 500 may also be detachably mounted to the air block 300. The mixing head surface 500 includes a plate-shaped body 510 formed to be perpendicular to the one direction. For example, the body 510 may be formed in a disc shape having a predetermined thickness.

1B is a longitudinal sectional view for explaining an assembling aspect of a mixing head surface and a combustor injector and an oxidizer injector. The mixing head surface 510 includes a plurality of holes formed in the one direction. The air contained in the air block 300 flows into the ignition part 400 and the mixing head surface 500 is cooled by the air.

The oxidant injector 310 is inserted into the hole and mounted so as to protrude from the mixing head surface 510. The oxidant injector 310 according to the present invention further includes a cooling fin structure for enhancing the cooling effect by the air. Hereinafter, the cooling fin structure according to various embodiments will be described.

FIGS. 2A and 2B are conceptual diagrams showing one oxidizer injector 310 to explain cooling pin structures according to an embodiment of the present invention.

The oxidant injector 310 according to the present embodiment includes a plurality of cooling fins 311 protruding from the outer circumferential surface. The plurality of cooling fins 311 may be formed to correspond to each other, but the present invention is not limited thereto, and the number of the cooling fins 311 is not limited. The oxidant injector 310 extends along the first direction D1 and the plurality of cooling fins 311 extend along the first direction D1. The cooling fin 311 protrudes from the outer surface of the oxidant injector 310 to have a predetermined first width w1. The cooling fin 311 may be formed integrally with the oxidant injector 310, but is not limited thereto. The cooling fin 311 may have a rectangular cross section.

The oxidant injector 310 having the plurality of cooling fins 311 is mounted on the mixing head surface 510 through the groove 510 '. One side of the cooling fin 311 and the oxidant injector 310 protrude from one side of the mixing head surface 510.

The diameter of the hole 510 'is formed in consideration of the first width w1 of the cooling fin 311 and the diameter of the oxidant injector 310. For example, the diameter of the hole 510 'may be formed to be twice the diameter of the first width w1 and the diameter of the oxidant injector 310. The cooling fins 311 form a region of the mixing head surface 510 forming the hole 510 'and a region of the oxidant injector 310.

A cooling region CA through which the cooled air flows can be formed between the plurality of cooling fins 311. [ One part of the hole is opened between the plurality of cooling fins 311 and the air contained in the air block 300 moves through one area of the opened hole and the cooling between the cooling fins 311 And moves to the area CA.

The air moves along the cooling area CA surrounded by the plurality of cooling fins 311 to absorb heat from the outer circumferential surface of the oxidant injector 310. In addition, since the air is in contact with the cooling fin 311, the heat transmitted to the cooling fin 311 can be cooled. That is, since the outer surface area of the oxidant injector 310 is enlarged by the cooling fin 311, the cooling effect can be improved.

As a result, the cooling effect can be increased, and since the air absorbs heat generated from the fins, the flame can be quickly mixed with a uniform temperature.

Further, the mixing head surface 510 may not be provided with an additional fixing structure in order to stably fix the oxidizer injector 310 to the hole 510 '. Therefore, the processing step of the mixing head surface 510 may be reduced .

3A to 3B are conceptual diagrams illustrating an oxidizer injector including a cooling fin according to another embodiment.

3A is a conceptual view for explaining the first and second regions a1 and a2 of the oxidant injector 320. Fig. 3B is a view of Fig. 3A viewed from the direction A, and Fig. 3C is a view FIG.

The oxidant injector 320 according to the present embodiment includes a plurality of first cooling fins 321 extending along the first direction d1 and protruding from the outer circumferential surface of the oxidant injector 320 by a first width w1, And a plurality of second cooling fins 322 protruding by a second width w2. The second width w2 is greater than the first width w1.

The first area a1 of the oxidant injector 320 fits into the hole 510 'of the mixing head surface 510. The plurality of first cooling fins 321 are formed in the first region a1. A space is formed between the area of the mixing head surface 510 constituting the hole 510 'and the outer peripheral surface of the oxidant injector 320 by the first cooling fin 321. And the air moves to the outside along the spacing space.

The second area a2 is exposed to the outside of the mixing head surface 510. The first and second regions a1 and a2 may include an assembly structure for fixing the first and second regions a1 and a2. The second area a2 may be assembled to the first area a1 on the mixing head surface 510 with the first area a1 passing through the hole 510 '. The first and second cooling fins 321 and 322 may be arranged to extend along the first direction d1. The diameters of the first and second regions a1 and a2 except for the first and second cooling fins 321 and 322 are substantially the same.

That is, the first and second cooling fins 321 and 322 may be formed in parallel along the first direction d1 while being stepped on each other. Accordingly, the number of the first and second cooling fins 321 and 322 may be the same. However, the present invention is not limited thereto, and the first and second cooling fins 321 and 322 may be formed in an intersecting manner or may have different numbers.

The outer circumference of the second region a2 including the second cooling fin 322 is formed to be larger than the outer circumference of the hole 510 '. Accordingly, the second region a2 can not be inserted into the hole 510 '. The stepped portion formed by the first and second cooling fins 321 and 322 overlaps with one region of the mixing head surface 510.

The air moved to the opening area formed by the first area a1 and a part of the mixing head surface 510 moves along the cooling area CA formed between the plurality of second cooling fins 322. [

Since the cooling area CA is expanded by the expanded width of the second cooling fin 322, the time for the air to stay in the cooling area CA may increase. Thus, the cooling efficiency can be improved.

4A and 4B are conceptual diagrams for explaining an oxidizer injector having cooling pins according to still another embodiment. 4A is a conceptual view for explaining the inner surface of the mixing head unit 510 on which the bushing 340 is mounted and FIG. 4B is a conceptual view for explaining the outer surface of the mixing head unit 510 on which the bushing 340 is mounted. to be.

FIG. 5A is a conceptual view for explaining the structure of the bushing including the first and second cooling fins, FIG. 5B is a conceptual view of the bushing of FIG. 5A viewed in the C direction, FIG. 5C is a view of the bushing of FIG. It is a conceptual diagram.

According to the present embodiment, the bushing 340 including the first and second cooling fins 343 and 344 formed at different widths is mounted in the oxidizer injector 330. The bushing 340 is mounted within the groove 510 'formed in the mixing head surface 510. The bushing 340 may be fixed to the mixing head surface 510 by welding or by screwing.

4A and 4B, an area adjacent to the mixing head surface 510 exposed to the outside is defined as one end 341a of the body 341 of the bushing 340 and the other end 341b of the opposite area is defined as an end, . The other end portion 341b may protrude from the mixing head surface 510, but is not limited thereto. The body 341 of the bushing 340 can be entirely inserted into the hole 510 '.

Referring to FIGS. 4A, 5A and 5B, the bushing 340 forms an inner hole. The first cooling fin 343 protrudes from the inner circumferential surface of the body 341 to have a first width w1. The distance between the first cooling fins 343 facing each other may be substantially equal to the diameter of the outer circumference of the oxidant injector 330. [

That is, the oxidant injector 330 is disposed in the inner hole of the body 341. The oxidant injector 330 is supported by a plurality of first cooling fins 343 and a space is formed between the body 341 and the oxidant injector 330 to allow air to move.

The first cooling fin 343 may extend along the first direction d1, but is not limited thereto. That is, the first cooling fin 343 may have a discontinuous protruding structure from the inner circumferential surface of the receiving portion 341.

4B, 5A and 5C, the second cooling fin 344 is formed to have a second width w2 longer than the first width w1. The second cooling fin 344 is formed at one end 341a of the body 341. [ That is, the second cooling fins 344 protrude from the one end 341a, and each end of the second cooling fins 344 passes through the inner hole of the body 341, Is formed close to the outer circumferential surface of the oxidant injector (330) protruding from the oxidant injector (510).

Each second cooling fin 344 extends a predetermined length along the first direction d1. Thus, a cooling region CA is formed between the plurality of second cooling fins 344.

The second cooling fins 344 forming the cooling region CA are integrally formed in the bushing 340 mounted on the mixing head surface 510 so that the pressure of the gas ejected from the oxidant injector 330 It can be used stably regardless of the size. Also, since the bushing 340 is formed to be detachable from the oxidant injector 330 and the mixing head surface 510, the manufacturing process of each structure can be simplified.

Since the oxidizer injector according to the present invention and the air heater including the extended cooling region including the oxidizer injector constitute the air heater for mixing the combustion gas and the air, the cooling characteristic of the injector can be improved and the thermal durability can be increased have.

The safety of the test apparatus can be improved by controlling the distribution of the air flowing around the injector.

The above-described oxidizer injector and air heater are not limited to the configuration and method of the above-described embodiments, but the embodiments may be modified so that all or some of the embodiments may be selectively And may be configured in combination.

Claims (9)

An air block formed to introduce air;
An ignition part communicating with the air block for initial ignition of the air;
A mixing head surface mounted to the ignition portion and including holes formed from the air block such that the air is discharged to the ignition portion;
An oxidant injector extending in one direction and formed to supply an oxidant to the ignition portion, the oxidant injector being inserted into the hole so as to protrude from the mixing head surface;
A first cooling fin supporting the oxidant injector from one area of the mixing head surface forming the hole; And
And a plurality of second cooling fins disposed on an outer circumferential surface of the oxidant injector exposed to the outside of the mixing head surface to form a cooling space. The method according to claim 1,
Wherein the first and second cooling fins have the same width and protrude from an outer peripheral surface of the oxidant injector. 3. The method of claim 2,
Wherein the first and second cooling fins have the same width and are integrally formed. The method according to claim 1,
Wherein the first cooling fin has a first width and the second cooling fin has a second width larger than the first width. The air heater according to claim 4, wherein one end of the second cooling fin overlaps the surface of the mixing head. The method according to claim 1,
Further comprising a bushing fixed to an inner circumferential surface of the hole and having the first and second wings attached thereto. The method according to claim 6,
The first wing portion protrudes from the inner peripheral surface of the bushing,
And the second wing portion is mounted to the end of the bushing. 8. The method of claim 7,
And the width of the second wing portion is larger than the width of the first wing portion. 9. The method of claim 8,
Wherein the bushing is coupled to the hole by a welding method or by a screw assembly method.
KR1020160025807A 2016-03-03 2016-03-03 Air-heater using gaseous fuel having injector having cooling pin KR101622178B1 (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102066491B1 (en) 2019-09-18 2020-01-15 국방과학연구소 air heater and assembly method for air heater

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006098049A (en) 2004-09-29 2006-04-13 Leister Process Technologies Air heater
KR101413476B1 (en) 2013-04-10 2014-07-01 국방과학연구소 Air-heater

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006098049A (en) 2004-09-29 2006-04-13 Leister Process Technologies Air heater
KR101413476B1 (en) 2013-04-10 2014-07-01 국방과학연구소 Air-heater

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102066491B1 (en) 2019-09-18 2020-01-15 국방과학연구소 air heater and assembly method for air heater

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