CN210568398U - High-efficiency blow-off burner - Google Patents
High-efficiency blow-off burner Download PDFInfo
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- CN210568398U CN210568398U CN201920951062.9U CN201920951062U CN210568398U CN 210568398 U CN210568398 U CN 210568398U CN 201920951062 U CN201920951062 U CN 201920951062U CN 210568398 U CN210568398 U CN 210568398U
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Abstract
The utility model provides a high-efficient burner of spouting, including base, outer sleeve and fuel nozzle, outer sleeve both ends opening, be provided with a great deal of fuel orifice on the fuel nozzle, each the fuel orifice along the axis direction of outer sleeve arranges. The utility model provides a combustor is spouted to high-efficient putting, it has following technological effect: firstly, the fuel spray holes are arranged along the axial direction of the outer sleeve, so that the air flow turning and resonance inside the outer sleeve are eliminated, and the noise is weakened to a certain extent; secondly, openings are formed in two ends of the outer sleeve, a large amount of high-speed airflow is generated by using the speed generated by the fuel spray holes, and the high-speed airflow flows through the outer sleeve to realize cooling, so that the phenomenon that the outer sleeve is burnt out is reduced or even eliminated; and thirdly, the two ends of the outer sleeve are opened, and the speed generated by the fuel spray holes is utilized to bring a large amount of oxygen for combustion supporting, so that the combustion efficiency is improved, and the phenomenon of black smoke emission is reduced.
Description
Technical Field
The utility model relates to an oil drilling technique, concretely relates to high-efficient blowout combustor.
Background
The oil and gas produced during Testing of oil and gas wells cannot be stored in large quantities and transported away by other means and must be subjected to a combustion process by means of blow-out (Well Testing) burners.
Fig. 1 is a side view of a prior art open-jet burner, and fig. 2 is a front view of a prior art open-jet burner, as shown in fig. 1-2, the prior art open-jet burner includes an outer sleeve 4 ' having an open end and a closed end, a fuel nozzle 2 ' is disposed in the outer sleeve 4 ', a plurality of fuel nozzles 3 ' are disposed in the fuel nozzle 2 ' and are radially arranged along the outer sleeve 4 ', and in general, 5 rows of circumferential fuel nozzles 3 ' are formed in the fuel nozzle 2 ', and each row has 8 fuel nozzles 3 '. When the combustion chamber works, fuel enters the sealed cylindrical outer sleeve 4 ' through the jet flow of the annular fuel spray holes 3 ', and is sprayed out through vertically turning to the outlet of the outer sleeve 4 ', and then can be contacted with the outside air to be ignited and combusted. At present, most of the blowout burners need to burn natural gas between 50 ten thousand square and 100 ten thousand square, and when 50 ten thousand square natural gas is produced daily in the conventional blowout burners, the flow velocity of the fuel spray holes 3 ' passing through the burners is about 293.62m/s, and the flow velocity of the fuel spray holes 6 ' passing through the outer sleeves 4 ' of the burners is about 11.19 m/s. Visible to the naked eye: the flame is immediately burnt upwards after being sprayed out, and the height of the flame is about 8-10 meters; at 100 ten thousand cubic feet of natural gas produced per day, the flow velocity through the fuel nozzle 3 'of the burner is about 683.45m/s, the flow velocity through the outlet of the outer sleeve 4' of the burner is about 26.04m/s, and the flow velocity is visible to the naked eye: the flame burns upward immediately after being sprayed out, and the height of the flame is about 12 meters.
The defects of the prior art are that high-frequency jet flow noise (sharp squeaking sound) is formed by high-speed injection of the fuel spray holes 3 ' in the outer sleeve 4 ', resonance is easily formed in the outer sleeve 4 ', noise is amplified, meanwhile, the outlet flow speed of the outer sleeve 4 ' is low and is only about 11m/s, the kinetic energy of large-section low-speed injection of fuel is small, the mixing state with outside air is poor, the ignition point is burnt in a diffusion combustion mode and is not far away from the outlet of the outer sleeve 4 ', and an upward burning flame form is formed under the action of buoyancy. In addition, because no air is supplied inside the outer sleeve 4 ', the heat at the root of the ignition point is low, the flame root is unstable, turbulent pulsation is relatively large, the influence of the environment is severe, and the rear cold air cannot enter the outer sleeve 4 ' to cool, so that the outer sleeve 4 ' is deformed and damaged under high-temperature radiation.
Fig. 3 and 4 show a geometric modeling of a blowout burner, a blowout flow chart and a nozzle local flow chart in the prior art, fig. 5 and 6 show a cloud chart of external temperature distribution of the blowout burner and the external flame shape of the blowout burner, respectively, and as shown in fig. 3-6, a sufficiently large calculation area is designed to study the specific process of the blowout burner according to the size of the combustion flame and the heat radiation influence area of the blowout burner. And discretizing by adopting a structured grid to establish a proper geometric grid model. The whole velocity streamline of the open-flow fuel and the local velocity streamline near the open-flow nozzle can show that the flow velocity at the radial fuel spray hole 3 'in the combustor is higher, the flow velocity in the cylindrical outer sleeve 4' is obviously reduced, the fuel is changed into an upward flow process under the influence of buoyancy and combustion reaction immediately after being sprayed out of the cylindrical spray hole, and the formed flue gas drives the unburned fuel to gradually increase the flow velocity along with the progress of the combustion reaction to present vertical ascending flow. As the velocity distribution analysis above shows, the fuel flow and the distribution of the high temperature zone formed during the combustion reaction are also shown, and the fuel flows out of the outer sleeve 4' and rises upward. In addition, due to the low velocity at the outlet of the outer sleeve 4 ', the injected fuel exhibits a diffusion combustion condition, the flame root is closer to the outlet of the outer sleeve 4', and the flame drift is unstable. As shown in FIG. 6, a 1500K high temperature annular flame is formed at the outer ring of the nozzle of the outer burner sleeve 4 ', which easily causes the outer burner sleeve 4' to be deformed by heat.
In summary, the blow-out burners of the prior art have the following disadvantages:
firstly, the fuel injection speed at the radial fuel spray holes 3 'of the burner fuel nozzle 2' is too high, the daily open injection quantity is more than 600m/s at 100 ten thousand square, and the formed high-frequency jet flow noise cannot be avoided;
secondly, the fuel injection speed at the outlet of the circular outer sleeve 4' of the burner is too low, and the cold air at the rear part is not replaced and cooled, so that the ignition point is too close to form stronger heat radiation to burn out the burner body;
thirdly, the jet velocity of the outlet of the outer sleeve 4' is too low, the kinetic energy is small, effective fuel and air can not be fully sheared and mixed, a premixed combustion state can not be formed, the combustion process can not be strengthened, the current diffusion combustion state is easily interfered by the external environment, the combustion efficiency is not high, the flame root is unstable, the formed flame rigidity is insufficient, the flow change or the large-flow open flow forms insufficient carbon particles for combustion, and the phenomenon of black smoke is caused.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a high-efficient burner that spouts that puts to solve the above-mentioned weak point among the prior art.
In order to achieve the above object, the present invention provides the following technical solutions:
a high-efficiency open-jet burner, which comprises a base, an outer sleeve and a fuel nozzle,
the fuel nozzle is provided with a plurality of fuel spray holes, and each fuel spray hole is arranged along the axial direction of the outer sleeve.
The high-efficiency blow-off burner has the advantages that,
the middle radial dimension of the inner hole of the outer sleeve is smaller than the radial dimensions of the two ends, and the radial dimensions of the outer sleeve gradually change from the middle to the two ends.
In the efficient blowout burner, the fuel nozzle comprises the central main cylinder and a plurality of radial branch cylinders communicated with the central cylinder, and a plurality of fuel spray holes are formed in the central main cylinder and each radial branch cylinder.
In the high-efficiency blowout burner, each fuel nozzle hole is located at the position with the smallest radial dimension in the outer sleeve.
In the high-efficiency open-jet combustor, the central axis of each fuel jet hole and the central axis of the outer sleeve are arranged in an outer inclination angle.
The camber angle of the high-efficiency blowout burner is between 10 and 20 degrees.
In the high-efficiency open-jet combustor, the number of the fuel jet holes is between 40 and 60.
In the high-efficiency blowout combustor, the number of the radial branch cylinders is 8-12.
In the technical scheme, the utility model provides a combustor is spouted to high-efficient putting, it has following technological effect:
firstly, the fuel spray holes are arranged along the axial direction of the outer sleeve, so that the air flow turning and resonance inside the outer sleeve are eliminated, and the noise is weakened to a certain extent;
secondly, openings are formed in two ends of the outer sleeve, a large amount of high-speed airflow is generated by using the speed generated by the fuel spray holes, and the high-speed airflow flows through the outer sleeve to realize cooling, so that the phenomenon that the outer sleeve is burnt out is reduced or even eliminated;
and thirdly, the two ends of the outer sleeve are opened, and the speed generated by the fuel spray holes is utilized to bring a large amount of oxygen for combustion supporting, so that the combustion efficiency is improved, and the phenomenon of black smoke emission is reduced.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments described in the present invention, and other drawings can be obtained by those skilled in the art according to these drawings.
FIG. 1 is a side view of a prior art blowout combustor;
FIG. 2 is a front view of a prior art blowout burner;
FIGS. 3-4 are a prior art open-flow combustor geometric modeling and open-flow flowsheet and a nozzle local flowsheet;
FIGS. 5-6 illustrate prior art cloud charts of the external temperature distribution of open-flow combustion and the external flame patterns of open-flow combustors;
fig. 7 is a side view of a blowout combustor provided in accordance with an embodiment of the present invention;
fig. 8 is a front view of a blowout burner according to an embodiment of the present invention.
Description of reference numerals:
the prior art is as follows:
1', a gas inlet connecting pipe; 2', a fuel nozzle; 3', fuel injection holes; 4', an outer sleeve; 5', a burner mount; 6', an air outlet;
the utility model discloses:
1. a gas inlet connecting pipe; 2. an air inlet; 3. a fuel injector; 4. a radial support cylinder; 5. an outer sleeve; 6. a base; 7. an air outlet; 8. a fuel injection hole is formed.
Detailed Description
In order to make the technical solution of the present invention better understood by those skilled in the art, the present invention will be further described in detail with reference to the accompanying drawings.
As shown in fig. 7-8, an embodiment of the present invention provides a high-efficiency open-jet burner, which includes a base 6, an outer sleeve 5, and a fuel nozzle 3, where two ends of the outer sleeve 5 are open, the fuel nozzle 3 is provided with a plurality of fuel nozzles 8, and each fuel nozzle 8 is arranged along an axial direction of the outer sleeve 5.
Specifically, the base 6 is a fixed reference of the high-efficiency blowout combustor, and is generally a support structure, and may optionally be other metal or concrete base structures, the outer sleeve 5 is fixed on the base 6, two ends of the outer sleeve 5 are open, an opening at one end of the outer sleeve 5 is the air inlet 2, an opening at the other end of the outer sleeve is the air outlet 7, the fuel nozzle 3 is located in the outer sleeve 5, the fuel nozzle 3 is connected to the gas inlet adapter 1, fuel such as natural gas is delivered to the fuel nozzle 3 through the gas inlet adapter 1, the fuel nozzle 3 is provided with a plurality of fuel nozzle holes 8, each fuel nozzle hole 8 is arranged along the axial direction of the outer sleeve 5, here, the arrangement of the fuel nozzle holes 8 along the axial direction of the outer sleeve 5 should be: the central axis of the fuel spray holes 8 is parallel or basically parallel to the central axis of the outer sleeve 5, for example, the included angle between the central axis and the central axis is less than 20 degrees, namely, the fuel sprayed through the fuel spray holes 8 directly impacts the air outlet 7 of the outer sleeve 5 instead of impacting the inner wall of the outer sleeve 5 to turn internally, so that resonance is reduced, and the sound volume of noise is reduced.
When the high-efficiency open-jet combustor provided by the embodiment is used, fuel is sprayed from the fuel spray holes 8, is sprayed basically along the direction of the central axis of the outer sleeve 5, and is directly sprayed from the air outlet 7, due to the high-speed spraying of the fuel, air is synchronously driven to enter from the air inlet 2 of the outer sleeve 5 at a high speed, and then is sprayed from the air outlet 7 of the outer sleeve 5 at a high speed, namely, the air is sprayed from the air outlet 7 of the outer sleeve 5 as a mixture of air and fuel flow, and then the mixture is ignited on the outer side of the outer sleeve 5, so that open-jet.
The embodiment of the utility model provides a combustor is spouted to high efficiency is put, it has following technological effect:
firstly, the fuel spray holes 8 are arranged along the axial direction of the outer sleeve 5, so that the air flow turning and resonance inside the outer sleeve 5 are eliminated, and the noise is weakened to a certain extent;
secondly, two ends of the outer sleeve 5 are provided with openings, a large amount of high-speed airflow is brought by the speed generated by the fuel spray holes 8, and the high-speed airflow flows through the outer sleeve 5 to realize cooling, so that the phenomenon that the outer sleeve 5 is burnt out is reduced or even eliminated;
thirdly, the two ends of the outer sleeve 5 are opened, and the speed generated by the fuel spray holes 8 is utilized to bring a large amount of oxygen combustion supporting, so that the combustion efficiency is improved, and the phenomenon of black smoke emission is reduced.
The utility model provides a further embodiment, it is further, radial dimension is less than the radial dimension at both ends in the middle of the hole of outer sleeve 5, and the radial dimension that is the outer sleeve 5 middle zone is also less, and both ends are great, and the thin both ends in the through-hole center in outer sleeve 5 are thick, outer sleeve 5 changes gradually to both ends radial dimension from the centre, also from the centre to both ends smooth transition, so set up be used in that, the air is got into by air intake 2 by the fuel flow drive of high-speed injection, and air outlet 7 discharges, and the thick structure in the thin both ends in the centre makes the air current form in the middle of relatively high speed, the mobile form of both ends relatively low-speed, so be convenient for spray the high-speed of fuel flow to fuel orifice 8 department, and the air current that disperses at relatively low.
In still another embodiment, furthermore, the fuel nozzle 3 includes a central main cylinder and a plurality of radial branch cylinders 4 connected to the central main cylinder, the central main cylinder and each of the radial branch cylinders 4 are provided with a plurality of fuel nozzles 8, the central main cylinder is connected to the gas inlet pipe 1, each radial branch cylinder 4 is connected to the central main cylinder, preferably, the number of the radial branch cylinders 4 is between 8-12, most preferably 10, and the plurality of radial branch cylinders 4 disperse the uniform fuel flow to be sprayed, so as to facilitate the sufficient mixing of the fuel and the air.
More preferably, each of the fuel injection holes 8 is located at the position of minimum radial dimension inside the outer sleeve 5, i.e. the position of maximum air velocity of the fuel flow at the fuel injection hole 8, so as to maximize the maximum velocity of the utilized air.
Still further, the central axis of each fuel nozzle hole 8 and the central axis of the outer sleeve 5 are arranged in an outward inclination angle, where the outward inclination angle refers to that the central axis of each fuel nozzle hole 8 extends towards the direction departing from the central axis of the outer sleeve 5, that is, the distance between the fuel flow ejected from each fuel nozzle hole 8 and the central axis of the outer sleeve 5 gradually increases, the fuel flow jet ejected by the fuel nozzle holes 8 as a whole is in a divergent shape and has the smallest radial dimension of the root, and then the fuel flow jet gradually increases to increase the mixed air amount, thereby improving the fuel efficiency, and preferably, the outward inclination angle is between 10 and 20 degrees. The number of the fuel injection holes 8 is between 40 and 60.
The embodiment of the utility model provides a high-efficient blowout combustor, preferred, the both ends of outer sleeve 5 all are linked together with the external world, can synchronous inflow air outflow air; the fuel nozzle 3 has a plurality of radial branch cylinders 4, and each radial branch cylinder 4 has 4-5 spray holes and sprays obliquely forwards or outwards. Preferably, the fireproof pouring material is additionally arranged inside the outer sleeve 5, the high-temperature-resistant steel plate with the thickness of 5-10 mm is arranged outside the outer sleeve, a through hole is formed in the tail of the outer sleeve 5, the front-end fuel injection energy is conveniently utilized, the negative-pressure injection air multiplication technology is formed, the inner portion of the outer sleeve 5 is mixed with gas to form local premixed combustion, and the root of flame is stabilized. The high-speed jet fuel gas in the outer sleeve 5 is used for forming negative pressure to inject and multiply the air at the rear part to cool the burner body, so that the burner is prevented from being deformed by heating. In addition, for noise control, jet noise and combustion noise are reduced by accurately calculating the over-orifice gas velocity.
The fuel nozzle 3 is changed into a multi-branch component, a plurality of fuel spray holes 8 with certain inclination angles outwards are arranged on each radial branch cylinder body 4, the variable radial injection is the injection towards the outlet of the outer sleeve 5, the number of the spray holes is increased, the jet speed of the fuel spray holes 8 is reduced, and the jet noise is reduced.
The inner wall of the outer sleeve 5 is additionally provided with a Venturi structure, cold air at the rear part of the burner is ejected forwards to enter the inner part of the outer sleeve 5 of the burner by negative pressure formed at the Venturi throat part structure by high-speed jet flow before the multiple spray holes, and the burner nozzle of the burner and the outer sleeve 5 are cooled to ensure that the cooling under high-temperature heat radiation inhibits the adverse effect of the high-temperature radiation on the burner body.
Through the multi-path multi-orifice fuel forward injection of the support cylinder 4 and the venturi tube structure in the outer sleeve 5, the premixing state of fuel and air is strengthened, after a fuel-air mixture in a high mixing state is formed in the outer sleeve 5, the fuel-air mixture is injected out of the outer sleeve 5 at a high speed, the formed flame root can be far away from an outlet of the outer sleeve 5, meanwhile, high-rigidity root combustion flame can be formed through efficient combustion of premixed fuel, the flame effectively extends towards the jet flow direction, and then the flame gradually combusts upwards under the action of buoyancy. Reduce black smoke and flame heat radiation damage to the burner body.
In the embodiment, each radial cylinder 44-5 spray holes are obliquely sprayed at an outward angle of 15-17 degrees. The interior of the outer sleeve 5 is additionally provided with a refractory material and an external 5mm steel plate, and a through hole is formed in the tail part of the outer sleeve 5, so that the front end fuel injection energy is conveniently utilized, the air multiplication technology is injected by negative pressure, the interior of the sleeve is mixed with gas to form local premixed combustion, and the root of flame is stabilized. The high-speed jet fuel gas inside the sleeve forms negative pressure to inject multiplied rear air to cool the burner body, so that the burner is prevented from being deformed by heating. In addition, for noise control, jet noise and combustion noise are reduced by accurately calculating the over-orifice gas velocity. The inner wall of the air door at the rear part of the combustor can be provided with a light refractory castable interlayer with the thickness of 50-100 mm to form a silencer. And (4) performing calculation analysis under the open flow working condition of 50-100 ten thousand square/day. The flow velocity of the through holes of the burner nozzle is reduced to 163-327 m/s, so that the generation of jet flow noise is effectively reduced. Meanwhile, a plurality of jets formed by the multi-radial support cylinder body 4 can form better shearing mixing with air to form a premixing efficient combustion state, so that the combustion efficiency is improved, and meanwhile, the burner flame of the forward jet changes from soft upward combustion into a forward jet high-rigidity flame combustion state far away from the burner body. Meanwhile, the high-speed jet forms negative pressure injection and reduces the temperature of the burner body through the supplement of cold air at the rear part.
While certain exemplary embodiments of the present invention have been described above by way of illustration only, it will be apparent to those of ordinary skill in the art that the described embodiments may be modified in various different ways without departing from the spirit and scope of the present invention. Accordingly, the drawings and description are illustrative in nature and should not be construed as limiting the scope of the invention.
Claims (8)
1. A high-efficiency open-jet burner comprises a base, an outer sleeve and a fuel nozzle, and is characterized in that,
the fuel nozzle is provided with a plurality of fuel spray holes, and each fuel spray hole is arranged along the axial direction of the outer sleeve.
2. The high efficiency blowout burner of claim 1,
the middle radial dimension of the inner hole of the outer sleeve is smaller than the radial dimensions of the two ends, and the radial dimensions of the outer sleeve gradually change from the middle to the two ends.
3. The high-efficiency open-jet burner of claim 2, wherein the fuel injector comprises a central main cylinder and a plurality of radial branch cylinders connected to the central main cylinder, and a plurality of fuel injection holes are formed in the central main cylinder and each of the radial branch cylinders.
4. The high efficiency open jet burner of claim 3, wherein each of said fuel orifices is located at a position of minimum radial dimension within said outer sleeve.
5. The high efficiency open jet combustor according to claim 3, wherein the central axis of each of the fuel nozzle holes is arranged at an outward inclination to the central axis of the outer sleeve.
6. The high efficiency blowout burner of claim 5, wherein the camber angle is between 10-20 degrees.
7. The high efficiency open-jet combustor according to claim 5, wherein the number of said fuel injection holes is between 40-60.
8. The high efficiency blowout burner of claim 5, wherein the number of the radial leg bodies is between 8 and 12.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920951062.9U CN210568398U (en) | 2019-06-21 | 2019-06-21 | High-efficiency blow-off burner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920951062.9U CN210568398U (en) | 2019-06-21 | 2019-06-21 | High-efficiency blow-off burner |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210568398U true CN210568398U (en) | 2020-05-19 |
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ID=70639247
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920951062.9U Active CN210568398U (en) | 2019-06-21 | 2019-06-21 | High-efficiency blow-off burner |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210568398U (en) |
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2019
- 2019-06-21 CN CN201920951062.9U patent/CN210568398U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20201123 Address after: No. 6, liupukang, Xicheng District, Beijing 100120 Patentee after: CHINA NATIONAL PETROLEUM Corp. Patentee after: China National Petroleum Corporation Great Wall Drilling Engineering Co.,Ltd. Address before: 100101 Beijing Chaoyang District Anli Road No. 101 Patentee before: China National Petroleum Corporation Great Wall Drilling Engineering Co.,Ltd. Patentee before: CHINA NATIONAL LOGGING Corp. |
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| TR01 | Transfer of patent right |