CN110454784A - Recuperator and radiant tube type heating device - Google Patents
Recuperator and radiant tube type heating device Download PDFInfo
- Publication number
- CN110454784A CN110454784A CN201910208950.6A CN201910208950A CN110454784A CN 110454784 A CN110454784 A CN 110454784A CN 201910208950 A CN201910208950 A CN 201910208950A CN 110454784 A CN110454784 A CN 110454784A
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- China
- Prior art keywords
- combustion air
- burning
- waste gas
- guiding tube
- burner
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Links
- 238000010438 heat treatment Methods 0.000 title claims abstract description 81
- 238000002485 combustion reaction Methods 0.000 claims abstract description 234
- 239000002912 waste gas Substances 0.000 claims abstract description 97
- 239000000446 fuel Substances 0.000 claims abstract description 33
- 210000005239 tubule Anatomy 0.000 claims abstract description 32
- 230000002093 peripheral effect Effects 0.000 claims abstract description 8
- 230000008676 import Effects 0.000 claims description 13
- 238000010304 firing Methods 0.000 abstract description 3
- 239000007789 gas Substances 0.000 description 16
- 238000010586 diagram Methods 0.000 description 5
- 239000004215 Carbon black (E152) Substances 0.000 description 4
- 229930195733 hydrocarbon Natural products 0.000 description 4
- 150000002430 hydrocarbons Chemical class 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 3
- 230000005855 radiation Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 239000002737 fuel gas Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 230000002401 inhibitory effect Effects 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
- F23D14/12—Radiant burners
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN A CARRIER GAS OR AIR
- F23C3/00—Combustion apparatus characterised by the shape of the combustion chamber
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
- F23D14/12—Radiant burners
- F23D14/126—Radiant burners cooperating with refractory wall surfaces
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
- F23D14/46—Details, e.g. noise reduction means
- F23D14/66—Preheating the combustion air or gas
-
- 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
- F23L15/00—Heating of air supplied for combustion
- F23L15/04—Arrangements of recuperators
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Combustion Of Fluid Fuel (AREA)
- Air Supply (AREA)
Abstract
The peripheral side in exhaust portion that the burning waste gas generated when by fuel combustion is guided to exhaust outlet, it is provided with the multiple tubules for guiding combustion air into discharge unit, the set canister portion of major diameter in the front end and discharge unit of each tubule is linked, each intratubular combustion air is directed to using the heat heating of burning waste gas and is guided to set canister portion, in addition, in the combustion air supply pipe that the combustion air that will gather in canister portion by heating is guided to burner, combustion air guiding tube is installed in a manner of slidable, and opening portion is set in set canister portion and combustion air guiding tube, the area of the mutual connected component in opening portion is adjusted, it is adjusted with the amount of the burning waste gas guided in opposed firing air guiding tube.
Description
Technical field
The present invention relates to a kind of recuperator and the radiant tube type heating device of this recuperator is applied, it is above-mentioned
Recuperator guides the combustion air supplied to burner into exhaust portion, in burning waste gas and combustion in above-mentioned exhaust portion
Burning is heated, above-mentioned exhaust portion will be to combustion with heat exchange is carried out between air with the combustion air that opposed firing device supplies
Burner supplies combustion air and guides the burning waste gas generated when fuel combustion to exhaust outlet.Especially, there is following spy
Sign efficiently heats the combustion air supplied to burner using the burning waste gas after burning in above-mentioned recuperator,
So as to effectively utilize the heat of burning waste gas, and the combustion air as described above by heating is being supplied to burner
In the case where giving and making fuel combustion, harmful nitrogen oxides (hereinafter referred to as NO is suitably prevented using simple structureX)
Generation.
Background technique
In the past, in the industrial furnaces such as heating furnace, heat-treatment furnace, the combustion air supplied to burner is guided to will be to
Burner supply combustion air is so that in the exhaust portion that the burning waste gas that generates of when fuel combustion is guided to exhaust outlet, using setting
The recuperator being placed in above-mentioned exhaust portion carries out heat exchange between burning waste gas and combustion air, thus heat to
The combustion air of burner supply, can effectively utilize the heat of burning waste gas.
In addition, the flame of burner is contacted with heating object in order to prevent in the industrial furnaces such as heating furnace, heat-treatment furnace,
Made to heat object oxidation, using a kind of radiant tube type heating device, supplies and fire to the burner for the one end for being set to radiant tube
Material and combustion air, make fuel gas in radiation combustion inner pipe in said burner, and the burning waste gas after making burning passes through
The exhaust portion of the another side of radiant tube and from exhaust outlet be discharged.
In addition, in radiant tube type heating device as described above, in order in the burning for the one end for being set to radiant tube
In device, make fuel in radiation combustion inner pipe, and effectively utilize the heat of the burning waste gas after burning, as shown in patent document 1 etc.,
A kind of scheme is proposed, above-mentioned recuperator, benefit are set in the exhaust portion of the another side of the radiant tube of discharge burning waste gas
With the recuperator to which the combustion air supplied by the hot opposed firing device of burning waste gas is heated, this will be passed through
The combustion air of sample heating is supplied to said burner, makes fuel combustion using the combustion air by heating, to have
Effect ground utilizes the heat of burning waste gas.
In addition, in radiant tube type heating device as described above, in order to will efficiently be fired using the heat of burning waste gas
Burning is heated to high temperature with air, the above-mentioned recuperator of the exhaust portion as the another side for being set to radiant tube, such as patent
It shown in document 2, proposes, multiple tubules that combustion air is guided into exhaust portion are in the mode opposite with burner exhaust stream
It is set to the peripheral side in discharge unit, the combustion air flowed across each tubule is sufficiently carried out using burning waste gas and is added
The combustion air for passing through each tubule in this way and fully heating is guided to the big pipe for being set to central portion, passes through this by heat
The big combustion air managed and fully heated is guided and is burnt to burner, so as to more effectively utilize burning waste gas
Heat.
Here, the combustion air sufficiently heated by the heat of burning waste gas is mixed with fuel gas as described above
And in the case where burning in the burner, it is excessively high there are the temperature of the combustion flame when burning a possibility that, whereby, when burning, produces
Raw NOXAmount increase, contain more NOXBurning waste gas be discharged from the exhaust portion of the another side of radiant tube to outside, exist
The technical issues of welding.
Therefore, in the past, for example, being proposed as shown in patent document 2~4, by a part of burning waste gas and it is above-mentioned like that
Combustion air mixing by heating, they are supplied and are burnt to burner, whereby, inhibit the NO generated when burningX's
Amount.
However, not recording in the device shown in patent document 2, patent document 3 according to the burning temperature in burner
The amount of degree, the burning waste gas of combustion air mixing of the opposite direction by heating is suitably regulated, in the combustion that will pass through heating
For burning air to when burner supply and burning fuel, generation when inhibiting burning cannot be suitably controlled to burning by existing
NOXAmount the technical issues of.
In addition, although describing the burning waste gas of the opposite combustion air mixing by heating in patent document 4
Amount is adjusted, but in the device shown in above patent document 4, is made of connecting rod, spool to the burning with process heating
The regulating valve that the amount of the burning waste gas mixed with air is adjusted, the position of spool is moved by above-mentioned connecting rod, thus
The amount of the burning waste gas mixed with the combustion air by heating is adjusted.
Therefore, it in the device shown in above patent document 4, is supplied in the combustion air that will pass through heating to burner
And when burning fuel, the amount of the burning waste gas mixed with the combustion air by heating cannot be automatically adjusted, In
It, cannot be by simple structure suitably in the case that combustion air by heating is supplied simultaneously burning fuel to burner
Prevent the NO contained in burning waste gasXAmount increase.
Existing technical literature
Patent document
Patent document 1: Japanese Patent Laid-Open 2011-94900 bulletin
Patent document 2: Japanese Patent Laid-Open 2011-241989 bulletin
Patent document 3: Japanese Patent Laid-Open 2000-146118 bulletin
Patent document 4: No. 555429 bulletin of Japanese Patent Laid (Japanese Patent Laid-Open 2012-163303 bulletin)
Summary of the invention
The present invention is to solve recuperator and using above-mentioned in the radiant tube type heating device of the recuperator
Such technical problem and make, above-mentioned recuperator guides the combustion air supplied to said burner, In into exhaust portion
Heat exchange is carried out between burning waste gas and combustion air in above-mentioned exhaust portion, and it is empty to heat the burning supplied to burner
Gas, above-mentioned exhaust portion will supply combustion air to burner and draw the burning waste gas generated when fuel combustion to exhaust outlet
It leads.
That is, technical problem of the invention is, in recuperator as described above, the burning waste gas after burning is utilized
The combustion air supplied to burner is efficiently heated, to effectively utilize the heat of burning waste gas, and will be as above-mentioned
Combustion air like that by heating is supplied to burner so that in the case where fuel combustion, can be fitted using simple structure
Locality prevents harmful NOXGeneration.
In addition, technical problem of the invention is, dress is being heated using the radiant tube type of recuperator as described above
In setting, combustion air is supplied to the burner for the one end for being set to radiant tube, makes fuel in radiant tube to using burner
Utilization is effectively performed in the heat of the burning waste gas generated in the case where interior burning, efficiently heats the burning supplied to burner and uses
Air improves efficiency of combustion, and the combustion air as described above by heating is being supplied to burner so that fuel
In the case where burning, harmful NO is suitably prevented using simple structureXGeneration, to prevent from containing in burning waste gas
Harmful NOXAnd it is discharged.
In recuperator of the invention, in order to solve technical problem as described above, in recuperator, to row
The combustion air supplied to said burner is guided in gas portion, in above-mentioned exhaust portion burning waste gas and combustion air it
Between carry out heat exchange, heat to burner supply combustion air, above-mentioned exhaust portion will to burner supply combustion air
And guiding the burning waste gas generated when fuel combustion to exhaust outlet, the peripheral side in discharge unit is provided with multiple tubules, this
A little tubules draw the combustion air imported from combustion air introduction part with above-mentioned burner exhaust stream into discharge unit on the contrary
It leads, using the heat heating guidance of the burning waste gas guided to discharge unit to each intratubular combustion air, and by each tubule
Front end and the set canister portion of the major diameter of central portion being set in discharge unit link, the burning that will be heated in each tubule
Guided into above-mentioned set canister portion with air, in addition, by the combustion air in above-mentioned set canister portion by heating to drawing
It is directed at the part for guiding side that the combustion air supply pipe of burner imports, combustion air is installed in a manner of slidable
Guiding tube, above-mentioned combustion air guiding tube use the above-mentioned combustion air by heating from above-mentioned set canister portion to burning empty
The guidance of gas supply pipe, and combustion air guiding tube is being installed on to the part of above-mentioned set canister portion in a manner of slidable
Combustion air guiding tube and set canister portion are respectively arranged with opening portion, and the burning waste gas in discharge unit is being passed through above-mentioned burning
It is imported above-mentioned combustion air with the opening portion of air guiding tube and connected component that the opening portion of set canister portion be connected to and is guided
In the case where in pipe, change the area of above-mentioned connected component, to combustion in importing combustion air guiding tube, in discharge unit
The amount for burning exhaust gas is adjusted.
In addition, burning waste gas in discharge unit is being passed through above-mentioned combustion air in recuperator of the invention
The opening portion of guiding tube and the connected component that is connected to of opening portion of set canister portion and import in above-mentioned combustion air guiding tube
In the case of, by changing the area of above-mentioned connected component, in combustion air guiding tube, row is imported so as to simply adjust
The amount of burning waste gas in portion out, can be according to across the combustion supply to burner, by heating of combustion air supply pipe
The temperature for using air is burnt, the burning waste gas of appropriate amount is supplied.
In addition, in recuperator of the invention, the area of above-mentioned connected component is guided with above-mentioned combustion air
Pipe with set canister portion thermal expansion difference and change, with from above-mentioned set canister portion across combustion air guiding tube and flow
, the temperature of combustion air by heating rise, the area of above-mentioned connected component increases, so as to make to import burning with empty
The amount of burning waste gas in gas guiding tube, in discharge unit increases.In this way, passing through set canister portion and combustion air guiding tube
And in the case that the temperature of combustion air flow, by heating rises, importing, the above-mentioned burning by heating is empty
In the state that the amount of the burning waste gas of gas increases automatically, supplies and burn to burner across above-mentioned combustion air supply pipe
Material, so as to simply inhibit the NO generated when burningX。
In addition, using the burning by heating guided from above-mentioned set canister portion in recuperator of the invention
The combustion that air is mixed with import from the above-mentioned connected component, burning waste gas in discharge unit and guided to combustion air supply pipe
Burning is provided with injector portion with the part of air guiding tube, and above-mentioned injector portion becomes the internal diameter of combustion air guiding tube gradually
It is small.In this way, making the combustion air flowed in combustion air guiding tube by heating and the flow velocity of burning waste gas upper
It states and accelerates in injector portion, promptly by them to combustion air supply pipe, and pass through the burning waste gas in discharge unit
Above-mentioned connected component is suitably aspirated and is imported into combustion air guiding tube.
In addition, in radiant tube type heating device of the invention, from combustion air supply pipe to the one end of radiant tube
Burner supply combustion air so that fuel in radiation combustion inner pipe, by the burning waste gas after burning from the another of radiant tube
The exhaust portion of end side is discharged, and the exhaust portion of the another side of above-mentioned radiant tube is provided with recuperator as described above, will
One end of the combustion air from above-mentioned combustion air supply pipe to radiant tube in above-mentioned recuperator by heating
Burner supply.In this way, in the another side for the radiant tube for making burning waste gas discharge of the fuel after radiate combustion inner pipe
Recuperator as described above is arranged in exhaust portion, efficiently heats the burning supplied to burner using the heat of burning waste gas and uses
Air, so as to improve efficiency of combustion, in addition, the combustion of appropriate amount can be supplied according to the temperature of the combustion air by heating
It burns exhaust gas and is supplied to said burner, so as to inhibit the NO generated when burningX。
It, can be efficient using the burning waste gas after burning by constituting as described above in recuperator of the invention
Ground heats the combustion air supplied to burner, to effectively utilize the heat of burning waste gas, and will be as described above
Combustion air by heating is supplied to burner so that in the case where fuel combustion, can be using simple structure come suitably
Prevent harmful NOXYield it is different with temperature and change.
In addition, by using recuperator as described above, can have in radiant tube type heating device of the invention
Effect ground makes fuel in radiant tube using to the burner for the one end for being set to radiant tube supply combustion air, by burner
The heat of the burning waste gas generated in the case where interior burning efficiently heats the combustion air supplied to burner, improves burning
Efficiency, and by the combustion air by heating as described above to burner supply and in the case where burning fuel, energy
Harmful NO is suitably prevented using simple structureXGeneration, so as to prevent in burning waste gas containing harmful NOXAnd
Discharge.
Detailed description of the invention
Fig. 1 is to indicate to have used the state of the radiant tube type heating device of the recuperator of embodiment of the present invention to show
Meaning explanatory diagram.
Fig. 2 is indicated in the radiant tube type heating device of above embodiment, in the exhaust of the another side of radiant tube
Portion is provided with the partially schematic explanatory diagram of the state of above-mentioned recuperator.
Fig. 3 indicates the exhaust portion in the another side of the radiant tube of the radiant tube type heating device of above embodiment, In
The part that the combustion air guiding tube and set canister portion installed in a manner of slidable are overlapped, is respectively set opening portion, is discharged
Burning waste gas in portion passes through the part for being connected to these opening portions to the state that combustion air guiding tube guides, and (A) is table
Show that the part of lower, each opening portion coincidence of the temperature for being directed to the combustion air of combustion air guiding tube is relatively narrow, discharge
The less state of the amount that burning waste gas in portion is guided across the part for being connected to each opening portion into combustion air guiding tube
Partial enlargement explanatory diagram, (B) is to indicate that the temperature for being directed to the combustion air of combustion air guiding tube is higher, respectively open
The part that oral area is overlapped is wider, and the burning waste gas in discharge unit passes through the part for being connected to each opening portion and guides to combustion air
The partial enlargement explanatory diagram of the more state of the amount guided in pipe.
Fig. 4 is indicated in the radiant tube type heating device of above embodiment, in the exhaust portion of the another side of radiant tube
Interior peripheral side is provided with the state of multiple tubules, and (A) is to indicate in the inner circumferential side of above-mentioned each tubule, is set to slidable
The section view explanation for the state that each opening portion for the part that the combustion air guiding tube that mode is installed is overlapped with set canister portion is connected to
Figure, (B) is to indicate that the inner circumferential side of above-mentioned each tubule is provided with the section view explanatory diagram of the state of combustion air guiding tube.
Fig. 5 be indicate to have used another industrial furnace of recuperator of embodiment of the present invention state it is schematically illustrate
Figure.
Symbol description
1: industrial furnace
1a: furnace wall
11: radiant tube
12: burner
13: discharge unit
14: combustion air introduction part
15: combustion air supply pipe
16: exhaust outlet
17: burning pipe portion
18: exhaust pipe portion
20: recuperator
21: tubule
22: set canister portion
22a: opening portion
22b: guidance canister portion
22c: space
23: combustion air guiding tube
23a: opening portion
23b: injector portion
24: flange part
24a: joint portion
24b: joint portion
31: air-supply air blower
32: air blower is used in exhaust
Specific embodiment
Hereinafter, it is based on attached drawing, recuperator to embodiment of the present invention and the radiant tube for having used recuperator
Formula heating device is specifically described.In addition, recuperator of the invention and the radiant tube type of recuperator has been used to add
Thermal is not limited to device shown in following embodiments and equipment, can be fitted in the range of not changing invention thought
It is implemented when changing.
Firstly, (A), (B) based on FIG. 1 to FIG. 4, the radiant tube to the recuperator for having used embodiment of the present invention
Formula heating device is specifically described.
Here, as shown in Figure 1, being used as radiant tube 11 in above-mentioned radiant tube type heating device and being formed as U-shaped
The radiant tube 11 for being formed as U-shaped, is configured at the inside of industrial furnace 1 by component, and the both ends of above-mentioned radiant tube 11 pass through furnace
Wall 1a and extend to the external of industrial furnace 1.In addition, the shape of the radiant tube 11 used is not limited to U-shaped as described above,
It is also possible to the well-known any shapes such as W font, I font.
In addition, in the present embodiment, supplying hydrocarbon (HC) gas to the burner 12 for the one end for being set to radiant tube 11
Equal fuel, and it is fed past the aftermentioned combustion air heated like that, in radiant tube 11, make above-mentioned fuel combustion.
Here, when supplying the combustion air being heated to burner 12 as described above, in the present embodiment, upper
It states in radiant tube 11, recuperator 20 is set in the discharge unit 13 for being not provided with the another side of burner 12, using sending
Wind air blower 31 makes combustion air pass through combustion air introduction part 14 and imports in above-mentioned recuperator 20.
Then, in above-mentioned recuperator 20, pass through in above-mentioned combustion air in above-mentioned 11 fuel of radiant tube
Heat exchange is carried out between burning waste gas after burning, heats above-mentioned combustion air using the heat of burning waste gas, and according to need
By a part guidance of burning waste gas in recuperator 20, make the above-mentioned combustion air heated like that and it is above-mentioned like that
A part of the burning waste gas of importing pass through combustion air supply pipe 15 and to the one of the radiant tube 11 for being provided with burner 12
End supply.
On the other hand, burning waste gas after making to heated combustion air in recuperator 20 as described above is from row
Port 16 is discharged.
Here, in the present embodiment, the above-mentioned energy in the discharge unit 13 for being set to the another side of radiant tube 11
In recover 20, the peripheral side in above-mentioned discharge unit 13 is provided with multiple tubules 21, which will be empty from above-mentioned burning
The combustion air that gas introduction part 14 imports is guided to the direction opposite with the burner exhaust stream in above-mentioned discharge unit 13, using
The combustion air that the heat heating of the burning waste gas flowed in discharge unit 13 is directed in each tubule 21.In addition, above-mentioned each small
The front end of pipe 21 and the set canister portion 22 of the major diameter for the central portion being set in discharge unit 13 link, and will pass through in each tubule 21
The combustion air for crossing heating is guided into above-mentioned set canister portion 22.
In this way, being divided into the flow path and Duo Gen (many) tubule 21 of combustion air, so as to make the benefit of combustion air
Increased with the area that the burning waste gas of the heat transmitting of tubule 21 and high temperature carries out heat exchange, the preheating of combustion air can be made to reach
Than previous higher high temperature.
In addition, in the set canister portion 22 for having imported the combustion air by heating from each tubule 21 as described above, if
It is equipped with and uses the burning that the combustion air by heating is guided out of set canister portion 22 to above-mentioned combustion air supply pipe 15
Air guiding tube 23 utilizes the burning waste gas of the peripheral side of flowing through above-mentioned set canister portion 22 and combustion air guiding tube 23
Heat, further to it is being guided from set canister portion 22 to combustion air guiding tube 23, add by the combustion air of heating
Heat.
Here, in the present embodiment, in setting by the combustion air by heating from gathering in canister portion 22 to burning
When the combustion air guiding tube 23 guided with air supply pipe 15, above-mentioned combustion air guiding tube 23 is mounted to collect
Close the periphery Slideslip of canister portion 22.Alternatively, it is also possible to which combustion air guiding tube 23 is mounted to gather in canister portion 22
All Slideslips.
In addition, in the combustion air guiding tube 23 and set 22 weight of canister portion installed in a manner of slidable as described above
The part of conjunction is respectively arranged with opening portion 22a, 23a, above-mentioned discharge unit 13 in set canister portion 22 and combustion air guiding tube 23
The opening portion 22a that interior burning waste gas passes through above-mentioned set canister portion 22 is connected to the opening portion 23a of combustion air guiding tube 23
Part and import above-mentioned combustion air guiding tube 23.Then, the burning waste gas and the above-mentioned combustion of process imported as described above
Burning with the combustion air that air guiding tube 23 heats passes through combustion air supply pipe 15 and together to being provided with burner 12
Radiant tube 11 one end supply, make fuel combustion using burner 12.
Here, combustion air is heated to by the heat of burning waste gas the shape of high temperature in recuperator 20 as described above
Under state, guided from combustion air supply pipe 15 to burner 12 and the ignition temperature in the case where making fuel combustion, when burning
NO excessively high, that when burning generatesXAmount increase, contain more NOXBurning waste gas from the exhaust outlet of the another side of radiant tube 11
16 discharges.
In this regard, making burning waste gas together with the combustion air by heating from combustion air supply pipe as described above
In the case that 15 make fuel combustion to the guidance of burner 12, ignition temperature when burning in order to prevent is excessively high, ideal
It is that the temperature of the combustion air by burning waste gas heating is higher, increases and mostly mixed with the combustion air by heating
Burning waste gas amount.
In addition, in the present embodiment, passing through the burning waste gas in discharge unit 13 as described above with slidable
Above-mentioned opening portion 22a, the 23a for the part setting that the set canister portion 22 and combustion air guiding tube 23 that mode is installed are overlapped are each other
The part of connection and import above-mentioned combustion air guiding tube 23, by burning waste gas imported in this way to being directed through heating
The combustion air guiding tube 23 of combustion air supplies.
In the above case, temperature in above-mentioned burning waste gas is low, in guidance to combustion air guiding tube 23
Combustion air temperature it is lower in the state of, above-mentioned combustion air guiding tube 12 by thermally expand caused by extend compared with
It is few, as shown in (A) of Fig. 3, gather above-mentioned opening portion 22a, 23a of the part of canister portion 22 and the coincidence of combustion air guiding tube 23
The part to overlap shortens, and the area of connected component reduces, across the part that above-mentioned opening portion 22a, 23a communicate with each other and to
The amount of the burning waste gas guided in combustion air guiding tube 23 is reduced, in this state, by the combustion by burning waste gas heating
Burning air can effectively utilize the heat of burning waste gas and efficiently burn to the guidance of burner 12 and burning fuel.
On the other hand, in the temperature height of above-mentioned burning waste gas, the combustion air of guidance to combustion air guiding tube 23
The higher state of temperature under, above-mentioned combustion air guiding tube 12 by thermally expand caused by extend increase, such as (B) of Fig. 3
It is shown, gather the portion that above-mentioned opening portion 22a, 23a of the part of canister portion 22 and the coincidence of combustion air guiding tube 23 overlap
Divide and increase, the area of connected component increases, and draws across the part that above-mentioned opening portion 22a, 23a communicate with each other to combustion air
The amount of the burning waste gas guided in conduit 23 increases, and uses the raised burning of temperature in the state that the amount of burning waste gas increases
Air can prevent the NO generated when burning to the guidance of burner 12 and burning fuelXAmount increase.
At this point, flowing has the air from the room temperature (low temperature) of external suction in tubule 21, in contrast, in burning sky
The gas for being mixed with the burning waste gas of high temperature is flowed in gas guiding tube 23, therefore, the thermal expansion of combustion air guiding tube 23
Thermal expansion than tubule 21 is big.
In addition, as shown in Fig. 2, respective one end of tubule 21 and combustion air guiding tube 23 is by joint portion 24a, 24b
It is fixed on identical flange part 24, therefore, thermal expansion is generated towards furnace inside, therefore, is acted towards furnace inside.
In addition, in the above-described embodiment, being provided in above-mentioned set canister portion 22 towards in combustion air guiding tube 23
The guidance canister portion 22b for becoming path, by from above-mentioned each guidance of tubule 21 to set canister portion 22, the burning by heating is empty
Gas in a manner of being overlapped with set canister portion 22 promptly to being mounted to the guidance of slidable combustion air guiding tube 23.
In addition, in order to as described above, using from the guidance of set canister portion 22 in combustion air guiding tube 23, process
The air-flow of the combustion air of heating, make burning waste gas in the radiant tube 11 of 13 side of discharge unit pass through above-mentioned opening portion 22a,
The interconnected part 23a and suitably guided into combustion air guiding tube 23, make the burning imported from connected component
The combustion air guiding tube 23 that exhaust gas and the combustion air by heating are mixed and guided to combustion air supply pipe 15
Part, be provided with injector portion 23b, injector portion 23b gradually becomes smaller the internal diameter of combustion air guiding tube 23.
As described above, flowed in combustion air guiding tube 23, combustion air by heating and burning waste gas
Flow velocity is accelerated at above-mentioned injector portion 23b, so that they promptly be guided to combustion air supply pipe 15.In addition, sharp
Accelerate flow velocity with guidance canister portion 22b, so that the pressure in space 22 is reduced, therefore, in the radiant tube 11 that 13 side of discharge unit can be made
Burning waste gas pass through above-mentioned connected component and suitably aspirate and import into combustion air guiding tube 23.
In addition, in the above-described embodiment, showing in radiant tube type heating device using recuperator 20
Example, but recuperator 20 of the invention also can be suitably used for other industrial furnaces etc..
For example, burning is arranged in the furnace wall 1a for the industrial furnace 1 for not using radiant tube 11 in industrial furnace 1 shown in Fig. 5
Pipe portion 17 supplies the fuel such as hydrocarbon (HC) gas to the burner 12 for being set to the burning pipe portion 17, and as described above, supply warp
It crosses the combustion air of the heating of recuperator 20 and supplies burning waste gas as needed, in industrial furnace 1, make above-mentioned fuel
Burning, and row is being utilized in industrial furnace 1 with the furnace wall 1a of above-mentioned 17 disconnected position of burning pipe portion setting exhaust pipe portion 18
Gas is guided the burning waste gas after fuel combustion into exhaust pipe portion 18 with air blower 32, in above-mentioned exhaust pipe portion 18 in setting
State recuperator 20 shown in embodiment.
In addition, in above-mentioned recuperator 20, utilizing air-supply air blower like that also described above in above-mentioned industrial furnace 1
31 make combustion air pass through the peripheral side being set in exhaust pipe portion 18 as described above from combustion air introduction part 14
Multiple tubules 21 and import, utilize the combustion that is directed in each tubule 21 of heat heating of the burning waste gas flowed in exhaust pipe portion 18
It burns and uses air, the combustion air in this way in each tubule 21 by heating is guided to the collection for the front end for linking each tubule 21
It closes in canister portion 22.
In addition, being used in above-mentioned industrial furnace 1 relative to the burning by heating is imported with from each tubule 21 as described above
The set canister portion 22 of air is installed the combustion air by heating in a manner of slidable from gathering in canister portion 22 to burning
The combustion air guiding tube 23 guided with air supply pipe 15, as shown in Figure 3 above, in 23 sum aggregate of combustion air guiding tube
The part that canister portion 22 is overlapped is closed, is respectively arranged with opening portion 22a, 23a in set canister portion 22 and combustion air guiding tube 23, such as
It is above-mentioned such, the part that the opening portion 22a of above-mentioned set canister portion 22 is connected to the opening portion 23a of combustion air guiding tube 23
Size be adjusted, with to exhaust pipe portion 18 in burning waste gas pass through connected component and to above-mentioned combustion air guide
The amount that combustion air that pipe 23 flows, by heating imports is adjusted.
Then, and above-mentioned to being adjusted as described above to the burning waste gas that the combustion air by heating imports
, by the combustion air that combustion air guiding tube 23 heats pass through combustion air supply pipe 15 together and to being provided with
The burning pipe portion 17 of burner 12 supplies, and so that fuel is suitably burnt using burner 12.
On the other hand, as described above, burning sky will be heated in recuperator 20 with air blower 32 using exhaust
Burning waste gas after gas, in exhaust pipe portion 18 is discharged from exhaust outlet 16.
Claims (4)
1. a kind of recuperator,
Into exhaust portion, to the combustion air of burner, the exhaust portion will be to burner supply burning use for guidance supply
Air is used in the exhaust portion in burning waste gas and burning so that the burning waste gas that generates of when fuel combustion is guided to exhaust outlet
Heat exchange is carried out between air, heats the combustion air supplied to burner, the recuperator is characterized in that,
Peripheral side in discharge unit is provided with multiple tubules, these tubules use the burning imported from combustion air introduction part
Air is guided into discharge unit on the contrary with the burner exhaust stream, is drawn using the heat heating of the burning waste gas guided to discharge unit
It is directed at each intratubular combustion air, and by the front end of each tubule and the major diameter for the central portion being set in discharge unit
Gather canister portion connection, the combustion air being heated in each tubule is guided into the set canister portion, in addition, will be described
Gather the guidance side that combustion air supply pipe of the combustion air by heating in canister portion to guidance to burner guides
Part, combustion air guiding tube is installed in a manner of slidable, the combustion air guiding tube by it is described by plus
Heat combustion air from the set canister portion to combustion air supply pipe guidance, and by combustion air guiding tube with
Slidable mode is installed on the combustion air guiding tube of the part of the set canister portion and set canister portion is respectively arranged with out
Oral area makes the burning waste gas in discharge unit pass through the opening portion of the combustion air guiding tube and the opening portion of set canister portion
The connected component of connection and in the case where importing in the combustion air guiding tube, change the area of the connected component, with
The amount for importing burning waste gas in combustion air guiding tube, in discharge unit is adjusted.
2. recuperator as described in claim 1, which is characterized in that
The area of the connected component changes with the combustion air guiding tube and the difference for the thermal expansion for gathering canister portion, with
Pass through combustion air guiding tube from the set canister portion and flow, the temperature of combustion air by heating rises,
The area of the connected component increases, to make the amount for importing burning waste gas in combustion air guiding tube, in discharge unit
Increase.
3. recuperator as claimed in claim 1 or 2, which is characterized in that
Make the combustion air derived from the set canister portion by heating and import from the connected component, discharge unit
The part of interior burning waste gas mixing and the combustion air guiding tube guided to combustion air supply pipe is provided with injector
Portion, the injector portion gradually become smaller the internal diameter of combustion air guiding tube.
4. a kind of radiant tube type heating device,
Combustion air is supplied so that fuel is in radiant tube from combustion air supply pipe to the burner of the one end of radiant tube
Interior burning the burning waste gas after burning is discharged from the exhaust portion of the another side of radiant tube, the radiant tube type heating device
It is characterized in that,
The exhaust portion of the another side of the radiant tube is provided with recuperator of any of claims 1 or 2, it will be described
The burning of one end of the combustion air from the combustion air supply pipe to radiant tube in recuperator by heating
Device supply.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2018090136A JP6821274B2 (en) | 2018-05-08 | 2018-05-08 | Recuperator and radiant tube type heating device |
| JP2018-090136 | 2018-05-08 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110454784A true CN110454784A (en) | 2019-11-15 |
Family
ID=68480583
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910208950.6A Pending CN110454784A (en) | 2018-05-08 | 2019-03-19 | Recuperator and radiant tube type heating device |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JP6821274B2 (en) |
| KR (1) | KR20190128548A (en) |
| CN (1) | CN110454784A (en) |
| TW (1) | TW201947157A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112303625A (en) * | 2020-10-09 | 2021-02-02 | 北京科技大学 | Gas radiant tube heat exchanger |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS555429A (en) | 1978-06-23 | 1980-01-16 | Nissan Motor Co Ltd | Pressure regulator for fuel injection type gasoline engine |
| JP2000146118A (en) | 1998-11-06 | 2000-05-26 | Ottoo:Kk | Recuperator |
| JP5670630B2 (en) | 2009-10-30 | 2015-02-18 | 新日鐵住金株式会社 | Recuperator protection method for radiant tube heating device |
| JP2011241989A (en) | 2010-05-14 | 2011-12-01 | Nippon Steel Engineering Co Ltd | Heat exchanger for radiant tube burner |
-
2018
- 2018-05-08 JP JP2018090136A patent/JP6821274B2/en active Active
-
2019
- 2019-01-07 TW TW108100541A patent/TW201947157A/en unknown
- 2019-02-25 KR KR1020190022097A patent/KR20190128548A/en unknown
- 2019-03-19 CN CN201910208950.6A patent/CN110454784A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112303625A (en) * | 2020-10-09 | 2021-02-02 | 北京科技大学 | Gas radiant tube heat exchanger |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2019196855A (en) | 2019-11-14 |
| TW201947157A (en) | 2019-12-16 |
| KR20190128548A (en) | 2019-11-18 |
| JP6821274B2 (en) | 2021-01-27 |
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Application publication date: 20191115 |