CN107152679A - Gas spray head and burner - Google Patents
Gas spray head and burner Download PDFInfo
- Publication number
- CN107152679A CN107152679A CN201610120643.9A CN201610120643A CN107152679A CN 107152679 A CN107152679 A CN 107152679A CN 201610120643 A CN201610120643 A CN 201610120643A CN 107152679 A CN107152679 A CN 107152679A
- Authority
- CN
- China
- Prior art keywords
- gas
- premix barrel
- plate
- spray head
- chamber
- 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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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
- F23D14/02—Premix gas burners, i.e. in which gaseous fuel is mixed with combustion air upstream of the combustion zone
-
- 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
-
- 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
- F23D14/48—Nozzles
-
- 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
- F23D14/62—Mixing devices; Mixing tubes
- F23D14/64—Mixing devices; Mixing tubes with injectors
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D2203/00—Gaseous fuel burners
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Nozzles For Spraying Of Liquid Fuel (AREA)
Abstract
The invention discloses a kind of gas spray head and burner, wherein, the gas spray head includes：Nozzle body (1), the nozzle body (1) is formed with the chamber (11) with fuel gas inlet (12)；Premix barrel (2), chamber (11) described in premix barrel (2) insertion, and the import (21) and outlet (22) of the premix barrel (2) respectively lead to be provided with the eddy flow spray orifice (23) for connecting the inside of the premix barrel (2) with the chamber (11) on the outside of the chamber (11), the tube wall of the premix barrel (2).The gas spray head can provide efficiently, the burning of energy-saving and environmental protection.
Description
Technical field
The present invention relates to gas combustion apparatus, in particular it relates to a kind of gas spray head and burner.
Background technology
The need for energy-conserving and environment-protective, for oil refining, chemical industry, the device for producing hydrogen of chemical fertilizer, one-stage converter,
The sharp again of the self-produced gases such as the tail gas self-produced to each device, resolution gas, desorption gas is widely implemented
With no longer feeding gas into torch burning.In device for producing hydrogen running, hydrogen manufacturing tipburn burner is by tail
Gas and combustion air mixing after-combustion, heat is provided for heating furnace.Due to self-produced tail gas pressure in plant running
Power is low, and calorific value is also low, when self-produced tail gas load is inadequate, and the high watt fuel pressure of supplement is also low, low pressure
The mixing ratio fuel under high pressure of fuel and air wants poor, the excess air coefficient (air capacity and reason of effective supply
By the ratio between air capacity) it is big, combustion flame is easily unstable, de- fire, further, since a part for fuel
Burning is completed in burner brazier brick, and the flue-gas temperature after burning is higher, so there is a certain amount of NOx
Generation, easily causes environmental pollution.
The content of the invention
The gas spray head of the efficient, burning of energy-saving and environmental protection can be provided it is an object of the invention to provide a kind of.
To achieve these goals, the present invention provides a kind of gas spray head, wherein, the gas spray head bag
Include：Nozzle body, the nozzle body is formed with the chamber with fuel gas inlet；Premix barrel, it is described pre-
Chamber described in mixed pipe insertion, and the inlet and outlet of the premix barrel respectively leads to the outside of the chamber,
The eddy flow spray orifice for connecting the inside of the premix barrel with the chamber is provided with the tube wall of the premix barrel.
Preferably, the chamber is dorsad formed with gas outlet on the locular wall of the fuel gas inlet, described pre-
The outlet of mixed pipe is close to the gas outlet.
Preferably, the eddy flow spray orifice for tilt spray orifice, and be arranged on the tube wall be located at the chamber
In part.
Preferably, the angle of the axis of the eddy flow spray orifice and the axis of the premix barrel is first angle
α, the eddy flow spray orifice are second with the angle of corresponding radial direction in the cross section of the premix barrel
Angle beta, the scope of the first angle α is 45 ° to 75 °, and the scope of the second angle β is
25 ° to 45 °.
Preferably, the quantity of the eddy flow spray orifice is multiple, and multiple eddy flow spray orifices are along the premix barrel
Circumferencial direction be uniformly arranged.
Preferably, the quantity of the gas outlet is multiple, the cross-sectional areas of multiple eddy flow spray orifices it
With with the scope of the ratio of the cross-sectional area sum of multiple gas outlets be 13/8 to 13/6.
Preferably, the nozzle body includes peripheral board, the first plate and second of setting spaced in parallel to each other
Plate, the edge of first plate and the second plate connects to surround the chamber, the combustion gas by peripheral board
Import is arranged on first plate, and the gas outlet is arranged on second plate.
Preferably, two ends of the premix barrel are connected to first plate and the second plate, described
It is connected with the spaced apart premix barrel of multi-turn on second plate, second plate is located at the pre- of outmost turns
The outer circumferential side of mixed pipe is provided with the gas outlet of at least one circumferentially spaced arrangement of circle, and described the
The inner circumferential side of the premix barrel positioned at innermost circle of two plates is provided with least one circumferentially spaced arrangement of circle
The gas outlet.
Preferably, the position being located between same circle premix barrel of second plate is additionally provided with the combustion gas
Outlet.
Preferably, the fuel gas inlet is arranged on the middle part of first plate, and the premix barrel is arranged on institute
State the outer circumferential side of fuel gas inlet.
In addition, the present invention also provides a kind of burner, the burner includes brazier brick, wherein, the combustion
Burner includes the gas spray head described in above-mentioned technical proposal, and the nozzle body stretches into the interior of the brazier brick
Chamber, and the gas outlet is towards the inner chamber.
Preferably, the quantity of the premix barrel is multiple, the madial wall of the brazier brick and the shower nozzle master
It is inner chamber annular space, the cross-sectional area sum of the import of multiple premix barrels and inner chamber between the lateral wall of body
The scope of the ratio of the cross-sectional area of annular space is 3/4 to 1/2.
By above-mentioned technical proposal, combustion gas can be supplied from fuel gas inlet to gas spray head, from premix barrel
Import supplies main air to premix barrel, hence into a part (this of the combustion gas of the chamber of gas spray head
Some gases are primary fuel) the one section of combustion of premix barrel and main air progress can be entered by eddy flow spray orifice
Burn, the flue gas after one section burns is discharged from the outlet of premix barrel, wherein, primary fuel is empty with one-level
Gas produces swirl-flow premixed in premix tube cavity runner, and gas mixing intensity is high, and fluid turbulence degree is big, combustion
Flame stabilization is burnt, excess air coefficient is effectively reduced, improves efficiency of combustion, it is to avoid burning is not filled
The phenomenon divided, thus the purpose of efficient energy-saving and environmental protection burning can be reached.
Other features and advantages of the present invention will be described in detail in subsequent embodiment part.
Brief description of the drawings
Accompanying drawing is, for providing a further understanding of the present invention, and to constitute a part for specification, with
Following embodiment is used to explain the present invention together, but is not construed as limiting the invention.
In accompanying drawing：
Fig. 1 is the front section view of gas spray head according to the embodiment of the present invention.
Fig. 2 is the upward view of gas spray head according to the embodiment of the present invention.
Fig. 3 is the front section view of premix barrel according to the embodiment of the present invention.
Fig. 4 is the cross-sectional view of premix barrel according to the embodiment of the present invention.
Description of reference numerals
The premix barrel of 1 nozzle body 2
The chamber of 3 extension tube attached 11
The gas outlet of 12 fuel gas inlet 13
The plate of 14 peripheral board 16 first
The import of 17 second plate 21
22 23 eddy flow spray orifices of outlet
Embodiment
The embodiment of the present invention is described in detail below in conjunction with accompanying drawing.It should be appreciated that
Embodiment described herein is merely to illustrate and explain the present invention, and is not limited to this hair
It is bright.
Referring to Fig. 1 to Fig. 4, according to an aspect of the invention, there is provided a kind of gas spray head, wherein,
Gas spray head includes：Nozzle body 1, nozzle body 1 surrounds chamber 11, and nozzle body 1 is formed with
With fuel gas inlet 12, (nozzle body 1 is provided with extension tube attached 3 to receive combustion at fuel gas inlet 12
Gas, be particularly suitable for use in receive low-pressure fuel gas) chamber 11；Premix barrel 2, the insertion chamber 11 of premix barrel 2,
And the import 21 of premix barrel 2 and outlet 22 are respectively led to outside chamber 11, on the tube wall of premix barrel 2
It is provided with inside and the eddy flow spray orifice 23 of chamber 11 of connection premix barrel 2.It should be added that,
Eddy flow spray orifice 23 is used for the inside for making combustion gas enter premix barrel 2 by the eddy flow spray orifice 23 from chamber 11
After produce eddy flow.
Based on above technical scheme, combustion gas can be supplied from fuel gas inlet 12 to gas spray head, from premix
The import 21 of pipe 2 supplies main air to premix barrel 2, hence into the combustion of the chamber 11 of gas spray head
A part (this Some gases is primary fuel) for gas can enter premix barrel 2 by eddy flow spray orifice 23
One section of burning is carried out with main air, outlet 22 row of the flue gas after one section burns from premix barrel 2
Go out, wherein, primary fuel produces swirl-flow premixed, gas with main air in the inner chamber runner of premix barrel 2
Mixing intensity is high, and fluid turbulence degree is big, and combustion flame is stable, effectively reduces excess air coefficient,
Improve efficiency of combustion, it is to avoid the insufficient phenomenon of burning, thus efficient, energy-saving and environmental protection can be reached
The purpose of burning.
Further, chamber 11 is dorsad formed with gas outlet 13 on the locular wall of fuel gas inlet 12, premixes
The outlet 22 of pipe 2 is close to the gas outlet 13.So, due to the outlet 22 of premix barrel 2
Close to gas outlet 13, so the combustion gas discharged from gas outlet 13 (this Some gases is secondary fuel)
Can be with air (this portion outside the flue gas and nozzle body 1 discharged from the outlet 22 of premix barrel 2
Point air is secondary air, madial wall typically from brazier brick and between the lateral wall of nozzle body
Inner chamber annular space) mixed combustion, so as to realize two sections of burnings, specifically, produced in eddy flow spray orifice 23
Under eddy flow (preferably strong eddy flow) effect, the mixing of primary fuel and air is accelerated, mixing is added
Uniformity, so as to promote combustion reaction, prevent the generation of flame localized hyperthermia, make flame be in
Even relatively low temperature levels.It is additionally, since the enhancing of combustion gas and air mixing uniformity, combustion gas can be with
Burning completely is realized under the conditions of relatively low excess air, therefore, the partial pressure of combustion process oxygen is
Reduction.Under the strong cyclonic action of combustion gas, eddy flow central flame road exit produces recirculating zone, forms flue gas certainly
Body is circulated, and it not only acts as the effect of stable flame and accelerated combustion reaction, while also functioning to reduction burning
The effect of area's temperature and oxygen concentration.Thus, it is possible to make NOx generations be suppressed (certainly, premise
NOx combustion gas type can be produced when being and being and burn from the combustion gas type that fuel gas inlet 12 enters), from
And NOx discharge is reduced, reach efficient, energy-conservation, low NOXDisposal of pollutants and the environmental protection of low noise
Purpose.
According to the preferred embodiment of the present invention, eddy flow spray orifice 23 is set to tilt the form of spray orifice
In the part being located in chamber 11 of tube wall.Certainly, the eddy flow spray orifice 23 is not limited to tilt spray orifice
Form, that is to say, that no matter whether the eddy flow spray orifice 23 tilt, as long as eddy flow can be produced, all
Protection scope of the present invention will be fallen into.In addition, referred to herein as " inclination " be interpreted as eddy flow spray orifice 23
Axis have a certain degree relative to the radial direction of premix barrel 2 (angle is not 0).
Specifically, the axis of eddy flow spray orifice 23 can be first angle with the angle of the axis of premix barrel 2
α, eddy flow spray orifice 23 can in the cross section of premix barrel 2 with corresponding radial direction (supplementary notes：
The axis of the in the radial direction corresponding diameter and eddy flow spray orifice 23 intersects at the side wall shape of premix barrel 2
Into periphery justify (joining is the H points shown in Fig. 4)) angle be second angle β, first jiao
Degree α's may range from 45 ° to 75 °, and second angle β's may range from 25 ° to 45 °.For
Premix barrel 2 is set to be easy to processing, it is preferable that first angle α's may range from 50 ° to 75 °,
Second angle β's may range from 25 ° to 40 °.And the invention is not restricted to this.
In addition, the quantity of eddy flow spray orifice 23 can be to be multiple, multiple eddy flow spray orifices 23 are along premix barrel 2
Circumferencial direction is uniformly arranged.The quantity of gas outlet 13 can also to be multiple, multiple eddy flow spray orifices 23
The scope of the ratio of the cross-sectional area sum of cross-sectional area sum and multiple gas outlets 13 for 13/8 to
13/6, preferably 13/7, but the invention is not restricted to this, it is necessary to when, suitably increase or reduce the ratio
It is possible.It is understood that the cross-sectional area sum of eddy flow spray orifice 23 and multiple gas outlets 13
Cross-sectional area sum ratio be primary fuel amount and secondary fuel amount distribution ratio.
According to the preferred embodiment of the present invention, nozzle body 1 can include peripheral board 14, parallel to each other
The spaced plate 16 (the first plate 15 and the second plate 16 are respectively preferably plectane) of first plate 15 and second,
The edge of first plate 15 and the second plate 16 connects to surround chamber 11, fuel gas inlet by peripheral board 14
12 are arranged on the first plate 15, and gas outlet 13 is arranged on the second plate 16.Specifically, premix barrel
2 two ends are connected on the first plate 15 and the second plate 16, the second plate 16 and are connected between multi-turn
Every the premix barrel 2 of arrangement, it is to be understood that multi-turn arranged for interval refers to premix barrel 2 both radially
It is arranged at intervals, and the premix barrel 2 of multiple circumferentially spaced settings is provided with each circle premix barrel 2.
The outer circumferential side of the premix barrel 2 positioned at outmost turns of second plate 16 can be provided with least one circle circumferentially side
To spaced apart gas outlet 13, the inner circumferential side of the premix barrel 2 positioned at innermost circle of the second plate 16 can
To be provided with the gas outlet 13 of at least one circumferentially spaced arrangement of circle.Certainly, second plate 16
Position between same circle premix barrel 2 is also provided with gas outlet 13.For example, Fig. 1 is shown
Position between the premix barrel 2 of innermost circle is provided with gas outlet 13, but present invention is obviously not limited to
This, if it is desired, the position between the premix barrel 2 of other circles can also be provided with gas outlet 13.Separately
Outside, the center of circle of each circle premix barrel 2 can be arranged concentrically, and the center of circle of each circle gas outlet 13 can be concentric
Set, and the center of circle of each circle premix barrel 2 can also be arranged concentrically with the center of circle of each circle gas outlet 13.
But the invention is not restricted to this.
In addition, fuel gas inlet 12 can be arranged on the middle part of the first plate 15, premix barrel 2 is arranged on combustion gas
The outer circumferential side of import 12.
According to another aspect of the present invention, a kind of burner is also provided, the burner includes brazier brick,
Wherein, the burner also includes the gas spray head described in above-mentioned technical proposal, and nozzle body 1 stretches into fire pot
The inner chamber of brick, and gas outlet 13 is towards inner chamber.The burner obviously possesses above-mentioned gas spray head
All advantages, are repeated no more here.
In addition, the quantity of premix barrel 2 can be to be multiple, the madial wall of brazier brick is outer with nozzle body 1
It is inner chamber annular space, cross-sectional area sum and the inner chamber annular space of the import 21 of multiple premix barrels 2 between the wall of side
Cross-sectional area ratio scope be 3/4 to 1/2, preferably 2/3, but the invention is not restricted to this, it is necessary to
When, suitably increase or reduce the ratio also possible.It is understood that multiple premix barrels 2
The ratio of the cross-sectional area sum of import 21 and the cross-sectional area of inner chamber annular space is main air amount and two
The distribution ratio of level air capacity.
The preferred embodiment of the present invention is described in detail above in association with accompanying drawing, still, the present invention is not limited
Detail in above-mentioned embodiment, can be to the present invention in the range of the technology design of the present invention
Technical scheme carry out a variety of simple variants, these simple variants belong to protection scope of the present invention.
It is further to note that each particular technique described in above-mentioned embodiment is special
Levy, in the case of reconcilable, can be combined by any suitable means.In order to avoid need not
The repetition wanted, the present invention no longer separately illustrates to various possible combinations.
In addition, various embodiments of the present invention can be combined randomly, as long as its
Without prejudice to the thought of the present invention, it should equally be considered as content disclosed in this invention.
Claims (12)
1. a kind of gas spray head, it is characterised in that the gas spray head includes：
Nozzle body (1), the nozzle body (1) is formed with the chamber with fuel gas inlet (12)
(11)；
Premix barrel (2), chamber (11) described in premix barrel (2) insertion, and the premix barrel (2)
Import (21) and outlet (22) respectively lead to the outsides of the chamber (11), the premix barrel (2)
Tube wall on be provided with and connect the inside of the premix barrel (2) and the eddy flow spray orifice of the chamber (11)
(23)。
2. gas spray head according to claim 1, it is characterised in that chamber (11) back of the body
Gas outlet (13) is formed with to the locular wall of the fuel gas inlet (12), the premix barrel (2)
(22) are exported close to the gas outlet (13).
3. gas spray head according to claim 2, it is characterised in that the eddy flow spray orifice (23)
To tilt spray orifice, and it is arranged on the part being located in the chamber (11) of the tube wall.
4. gas spray head according to claim 3, it is characterised in that the eddy flow spray orifice (23)
The angle of axis of axis and the premix barrel (2) be first angle (α), the eddy flow spray orifice (23)
With the angle of corresponding radial direction it is second angle (β) in the cross section of the premix barrel (2),
The scope of the first angle (α) is 45 ° to 75 °, and the scope of the second angle (β) is
25 ° to 45 °.
5. gas spray head according to claim 2, it is characterised in that the eddy flow spray orifice (23)
Quantity to be multiple, circumferencial direction of multiple eddy flow spray orifices (23) along the premix barrel (2) is equal
Cloth is set.
6. gas spray head according to claim 5, it is characterised in that the gas outlet (13)
Quantity to be multiple, the cross-sectional area sum of multiple eddy flow spray orifices (23) goes out with multiple combustion gas
The scope of the ratio of the cross-sectional area sum of mouth (13) is 13/8 to 13/6.
7. gas spray head according to claim 2, it is characterised in that the nozzle body (1)
The first plate (15) and the second plate (16) including peripheral board (14), setting spaced in parallel to each other, it is described
The edge of first plate (15) and the second plate (16) connects to surround the chamber by peripheral board (14)
(11), the fuel gas inlet (12) is arranged on first plate (15), the gas outlet (13)
It is arranged on second plate (16).
8. gas spray head according to claim 7, it is characterised in that the premix barrel (2)
Two ends are connected to first plate (15) and the second plate (16), second plate (16)
On be connected with the spaced apart premix barrel (2) of multi-turn, second plate (16) is located at outmost turns
The outer circumferential side of premix barrel (2) be provided with the combustion gas of at least one circumferentially spaced arrangement of circle and go out
Mouthful (13), the inner circumferential side of the premix barrel (2) positioned at innermost circle of second plate (16) be provided with to
The gas outlet (13) of the circumferentially spaced arrangement of a few circle.
9. gas spray head according to claim 8, it is characterised in that second plate (16)
The position being located between same circle premix barrel (2) be additionally provided with the gas outlet (13).
10. gas spray head according to claim 7, it is characterised in that the fuel gas inlet (12)
The middle part of first plate (15) is arranged on, the premix barrel (2) is arranged on the fuel gas inlet (12)
Outer circumferential side.
11. a kind of burner, the burner includes brazier brick, it is characterised in that the burner includes
Gas spray head as claimed in any of claims 2 to 10, the nozzle body (1) is stretched into
The inner chamber of the brazier brick, and the gas outlet (13) is towards the inner chamber.
12. burner according to claim 11, it is characterised in that the premix barrel (2)
Quantity is multiple, is interior between the lateral wall of the madial wall of the brazier brick and the nozzle body (1)
Chamber annular space, cross-sectional area sum and the inner chamber annular space of the import (21) of multiple premix barrels (2)
The scope of the ratio of cross-sectional area is 3/4 to 1/2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610120643.9A CN107152679A (en) | 2016-03-03 | 2016-03-03 | Gas spray head and burner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610120643.9A CN107152679A (en) | 2016-03-03 | 2016-03-03 | Gas spray head and burner |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107152679A true CN107152679A (en) | 2017-09-12 |
Family
ID=59792258
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610120643.9A Pending CN107152679A (en) | 2016-03-03 | 2016-03-03 | Gas spray head and burner |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107152679A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TW200813372A (en) * | 2006-09-08 | 2008-03-16 | Taiwan Sakura Corp | pre-mixed horizontal flame burning device |
| CN101153711A (en) * | 2006-09-29 | 2008-04-02 | 约翰津克公司 | Partial pre-mix flare burner and method |
| CN202032581U (en) * | 2011-01-24 | 2011-11-09 | 中国石油化工集团公司 | High-strength energy-saving mixed gas combustor with low nitrogen oxide emission |
| CN204100242U (en) * | 2014-09-22 | 2015-01-14 | 冼润章 | Ceramic kiln premixing type combustion energy-saving spray gun |
-
2016
- 2016-03-03 CN CN201610120643.9A patent/CN107152679A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TW200813372A (en) * | 2006-09-08 | 2008-03-16 | Taiwan Sakura Corp | pre-mixed horizontal flame burning device |
| CN101153711A (en) * | 2006-09-29 | 2008-04-02 | 约翰津克公司 | Partial pre-mix flare burner and method |
| CN202032581U (en) * | 2011-01-24 | 2011-11-09 | 中国石油化工集团公司 | High-strength energy-saving mixed gas combustor with low nitrogen oxide emission |
| CN204100242U (en) * | 2014-09-22 | 2015-01-14 | 冼润章 | Ceramic kiln premixing type combustion energy-saving spray gun |
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| PB01 | Publication | ||
| PB01 | Publication | ||
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| SE01 | Entry into force of request for substantive examination | ||
| CB02 | Change of applicant information | ||
| CB02 | Change of applicant information |
Address after: 100010 Beijing, Chaoyangmen, North Street, No. 25, No. Applicant after: China Offshore Oil Group Co., Ltd. Applicant after: China National Offshore Oil Corporation Applicant after: CNOOC Huizhou Petrochemical Co., Ltd. Address before: 100010 Beijing, Chaoyangmen, North Street, No. 25, No. Applicant before: China National Offshore Oil Corporation Applicant before: China National Offshore Oil Corporation Applicant before: CNOOC Huizhou Petrochemical Co., Ltd. |
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| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20170912 |