CN117736772A - Cooling jacket, gasification burner and cooling method - Google Patents
Cooling jacket, gasification burner and cooling method Download PDFInfo
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- CN117736772A CN117736772A CN202311658954.7A CN202311658954A CN117736772A CN 117736772 A CN117736772 A CN 117736772A CN 202311658954 A CN202311658954 A CN 202311658954A CN 117736772 A CN117736772 A CN 117736772A
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- wall
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- 238000001816 cooling Methods 0.000 title claims abstract description 205
- 238000002309 gasification Methods 0.000 title claims abstract description 35
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 75
- 239000002826 coolant Substances 0.000 claims abstract description 53
- 125000006850 spacer group Chemical group 0.000 claims abstract description 13
- 238000000034 method Methods 0.000 claims abstract description 10
- 239000000872 buffer Substances 0.000 claims description 20
- 239000000498 cooling water Substances 0.000 claims description 5
- 238000010276 construction Methods 0.000 claims description 3
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 abstract description 5
- 238000005192 partition Methods 0.000 abstract description 2
- 239000000446 fuel Substances 0.000 description 22
- 238000002485 combustion reaction Methods 0.000 description 19
- 230000002035 prolonged effect Effects 0.000 description 5
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 4
- 239000001301 oxygen Substances 0.000 description 4
- 229910052760 oxygen Inorganic materials 0.000 description 4
- 239000007921 spray Substances 0.000 description 4
- 239000007789 gas Substances 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000003245 coal Substances 0.000 description 2
- 230000002708 enhancing effect Effects 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 238000000889 atomisation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000000571 coke Substances 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 239000002283 diesel fuel Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- -1 residuum Substances 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 239000004449 solid propellant Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Abstract
The application discloses a cooling jacket, a gasification burner and a cooling method. The cooling jacket of the present application comprises a first cooling wall; an end portion connected to the first stave; the second cooling wall is connected with one side of the end part far away from the first cooling wall, and the first cooling wall, the end part and the second cooling wall are enclosed into a containing cavity; the spacer is arranged in the accommodating cavity and isolates the accommodating cavity from the flow passage; the partition piece comprises a third cooling wall and a flow guide part which are connected with each other, and the flow channel is provided with a water inlet channel, a cooling channel and a water outlet channel which are communicated in sequence; the cooling medium has a first flow velocity V in the cooling channel 1 m/s, the cooling medium having a second flow velocity V before entering the cooling passage 2 m/s, first flow velocity V 1 And a second flow rate V 2 The method meets the following conditions: v is not less than 1 1 ‑V 2 And is less than or equal to 3. The cooling jacket can prolong the service life of the burner in a high-temperature high-pressure pure oxygen environment.
Description
Technical Field
The application relates to a cooling device, in particular to a cooling jacket, a gasification burner and a cooling method.
Background
The gasification burner is core equipment of the entrained-flow gasifier, all gasification raw materials and gasifying agents are required to be continuously and stably conveyed to the gasifier through the gasification burner, and are fully mixed in a reasonable flow field through the cooperation of the burner and the gasifier, so that gasification reaction occurs. Because the gasification reaction is usually carried out in a pure oxygen environment with high temperature and high pressure, the head of the gasification burner is directly exposed to the high temperature environment with the temperature of more than 1400 ℃, and is subjected to high-intensity radiant heat, cracks and deformation are easily generated due to thermal fatigue, and the long-period stable operation of the gasification device is influenced. Therefore, a layer of cooling jacket is required to be arranged at the outer side of the gasification burner discharge port, and the cooling medium in the cooling jacket is used for exchanging heat with the external high-temperature environment, so that the cooling protection of the burner head is realized, and the service life of the gasification burner is prolonged.
Disclosure of Invention
The purpose of the present application is to provide a cooling jacket, a gasification burner and a cooling method. The cooling jacket can prolong the service life of the burner in a high-temperature high-pressure pure oxygen environment.
Embodiments of the present application provide a cooling jacket comprising:
a first stave;
an end portion connected to the first stave;
the second cooling wall is connected with one side of the end part, far away from the first cooling wall, and the first cooling wall, the end part and the second cooling wall are enclosed into a containing cavity;
the spacer is arranged in the accommodating cavity and isolates the accommodating cavity from the flow passage; the spacer comprises a third cooling wall and a flow guide part which are connected with each other, and the flow channel is provided with a water inlet channel, a cooling channel and a water outlet channel which are communicated in sequence;
the water inlet channel is formed between the first cooling wall and the third cooling wall; the water outlet channel is formed between the second cooling wall and the third cooling wall; a cooling channel is formed among the end part, the flow guiding part, the first cooling wall and the second cooling wall;
a cooling medium is fed from the water inlet channel to the cooling channel, and then the cooling medium is fed from the water outlet channel, wherein the cooling medium has a first flow velocity V in the cooling channel 1 m/s, the cooling medium has a second flow velocity V before entering the cooling channel 2 m/s, the first flow velocity V 1 And the second flow velocity V 2 The method meets the following conditions: v is not less than 1 1 -V 2 ≤3。
In some embodiments, the flow guiding part is connected with the first cooling wall through a first connecting part, the first connecting part is provided with a plurality of water inlet holes, and the water inlet channel is communicated with the cooling channel through the water inlet holes; the cooling jacket is provided with a first central axis, the water inlet hole and the first central axis are provided with a first included angle, and the angle of the first included angle is 20-60 degrees.
In some embodiments, the second flow rate V 2 The second flow velocity V is the flow velocity of the cooling medium in the water inlet hole 2 The range of (2) is 4m/s to 12m/s.
In some embodiments, the first flow rate V 1 The range of (2) is 5m/s to 15m/s.
In some embodiments, the cooling channels have a width of 1mm to 3mm.
In some embodiments, a first buffer chamber is provided between the first connection portion, the flow guide portion, the first cooling wall and the end portion, the first buffer chamber being located between the water inlet and the cooling channel.
In some embodiments, the flow guide is an annular flow guide block structure.
In some embodiments, a second connection part is arranged between the flow guiding part and the second cooling wall, the second connection part is provided with a plurality of water outlet holes, and the cooling channel is communicated with the water outlet channel through the water outlet holes.
In some embodiments, a second buffer chamber is formed between the second connection portion, the second cooling wall, and the flow guide portion, the second buffer chamber having a width greater than a width of the cooling channel.
In some embodiments, a support fin is disposed between the deflector and the end.
In some embodiments, the support fin is V-shaped, annular, or in-line in cross-section.
In some embodiments, the second connection is a swirl vane.
Accordingly, the embodiment of the application provides a gasification burner, which comprises a nozzle, wherein the periphery of the nozzle is provided with the cooling jacket.
Correspondingly, the embodiment of the application provides a cooling method of a gasification burner, which comprises the following steps:
the first medium is sent out from the first medium channel;
the second medium is sent out from the second medium channel, and the first medium and the second medium are mixed and combusted at a discharge hole of the nozzle;
cooling water is sent into the cooling channel from the water inlet channel, and the cooling water in the cooling channel is sent out through the water outlet channel;
the cooling medium has a first flow velocity V in the cooling passage 1 m/s, the cooling medium has a second flow velocity V before entering the cooling channel 2 m/s, the first flow velocity V 1 And the second flow velocity V 2 The method meets the following conditions: v is not less than 1 1 -V 2 ≤3。
The beneficial effects of this application lie in: compared with the prior art, the application discloses a cooling jacket, a gasification burner and a cooling method. The cooling jacket of the present application comprises a first cooling wall; an end portion connected to the first stave; the second cooling wall is connected with one side of the end part far away from the first cooling wall, and the first cooling wall, the end part and the second cooling wall are enclosed into a containing cavity; the spacer is arranged in the accommodating cavity and isolates the accommodating cavity from the flow passage; interval (C)The partition piece comprises a third cooling wall and a flow guide part which are connected with each other, and the flow channel is provided with a water inlet channel, a cooling channel and a water outlet channel which are communicated in sequence; a water inlet channel is formed between the first cooling wall and the third cooling wall; a water outlet channel is formed between the second cooling wall and the third cooling wall; a cooling channel is formed among the end part, the flow guiding part, the first cooling wall and the second cooling wall; the cooling medium is fed from the water inlet channel to the cooling channel, and then the cooling medium is fed from the water outlet channel, and the cooling medium has a first flow velocity V in the cooling channel 1 m/s, the cooling medium having a second flow velocity V before entering the cooling passage 2 m/s, first flow velocity V 1 And a second flow rate V 2 The method meets the following conditions: v is not less than 1 1 -V 2 And is less than or equal to 3. The cooling jacket can prolong the service life of the burner in a high-temperature high-pressure pure oxygen environment.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the description of the embodiments will be briefly introduced below, it being obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic view of a gasification burner with a cooling jacket in an embodiment of the present application;
FIG. 2 is a schematic view of a gasification burner with a cooling jacket according to other embodiments of the present application;
FIG. 3 is a schematic view of the structure of the portion A in FIG. 2 of the present application;
FIG. 4 is a schematic view of the internal structure of a cooling jacket according to some embodiments of the present application;
FIG. 5 is a schematic view of the internal structure of a cooling jacket according to some embodiments of the present application;
FIG. 6 is a side view of a cooling jacket in some embodiments of the present application;
FIG. 7 is a side view of a cooling jacket in some embodiments of the present application;
reference numerals: 1-cooling jacket, 100-accommodating chamber, 110-water inlet channel, 120-water outlet channel, 130-cooling channel, 140-first buffer chamber, 150-second buffer chamber, 101-first cooling wall, 102-end, 103-second cooling wall, 104-spacer, 1041-third cooling wall, 1042-guide part, 1043-boss, 105-first connecting part, 1051-water inlet hole, 106-second connecting part, 1061-water outlet hole, 107-supporting fin, 2-nozzle, 201-first spray head, 202-second spray head, 210-first medium channel, 220-second medium channel, 230-third medium channel, 3-gasification burner, 301-discharge port.
Detailed Description
The following description of the embodiments of the present application will clearly and fully describe the technical solutions of the embodiments of the present application, and it is apparent that the described embodiments are only some embodiments of the present application, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments herein without making any inventive effort, are intended to be within the scope of the present application. In addition, in the description of the present application, the term "comprising" means "including but not limited to". The terms first, second, third and the like are used merely as labels, and do not impose numerical requirements or on the order of construction. Various embodiments of the present application may exist in a range of forms; it should be understood that the description in a range format is merely for convenience and brevity and should not be construed as a rigid limitation on the scope of the application; it is therefore to be understood that the range description has specifically disclosed all possible sub-ranges and individual values within that range. For example, it should be considered that a description of a range from 1 to 6 has specifically disclosed sub-ranges, such as from 1 to 3, from 1 to 4, from 1 to 5, from 2 to 4, from 2 to 6, from 3 to 6, etc., as well as single numbers within the ranges, such as 1, 2, 3, 4, 5, and 6, wherever applicable. In addition, whenever a numerical range is referred to herein, it is meant to include any reference number (fractional or integer) within the indicated range.
As shown in fig. 1, the embodiment of the present application provides a cooling jacket 1, the cooling jacket 1 having a first central axis O 1 . The cooling jacket 1 includes: the first stave 101. The present application is provided with an end 102 on one side of the cooling jacket 1, the end 102 and the first coolingThe walls 101 are connected. The cooling jacket 1 further comprises a second cooling wall 103, wherein the second cooling wall 103 is connected with one side of the end part 102 far away from the first cooling wall 101, and the first cooling wall 101, the end part 102 and the second cooling wall 103 are enclosed into a containing cavity 100; meanwhile, a spacer 104 is disposed between the first cooling wall 101 and the second cooling wall 103, the spacer 104 is disposed in the accommodating cavity 100, the spacer 104 isolates the accommodating cavity 100 from a flow passage, the formed flow passage is used for circulation of cooling medium, and the spacer 104 includes a third cooling wall 1041 and a flow guiding portion 1042 connected to each other. In some specific constructions, the first stave 101, the second stave 103, and the third stave 1041 are along a first central axis O 1 A coaxially disposed cylindrical housing.
As shown in fig. 1, the flow passage divided by the spacer 104 has a water inlet passage 110, a cooling passage 130 and a water outlet passage 120 which are sequentially communicated, specifically, the water inlet passage 110 is formed between the first cooling wall 101 and the third cooling wall 1041; a water outlet channel 120 is formed between the second cooling wall 103 and the third cooling wall 1041; the cooling channel 130 is formed among the end 102, the flow guiding portion 1042, the first cooling wall 101 and the second cooling wall 103.
The cooling medium is fed from the water inlet channel 110 to the cooling channel 130, and then the cooling medium is fed from the water outlet channel 120, the cooling medium having a first flow velocity V in the cooling channel 130 1 m/s, the cooling medium has a second flow velocity V before entering the cooling channel 130 2 m/s, first flow velocity V 1 And a second flow rate V 2 The method meets the following conditions: v is not less than 1 1 -V 2 And is less than or equal to 3. By controlling the flow rate of the cooling medium before being sent into the cooling channel 130 and the flow rate of the cooling medium entering the cooling channel 130, the dead flow area is reduced, the convective heat exchange efficiency is improved, and the service life of the cooling jacket 1 is prolonged.
In some embodiments, a first connection portion 105 is disposed between the first cooling wall 101 and the flow guiding portion 1042, and a water inlet 1051 is disposed on the first connection portion 105, where the water inlet 1051 is a long hole structure, and the water inlet 1051 and the first central axis O 1 The angle of the first included angle alpha is 20-60 degrees. In some embodiments, e.g.As shown in fig. 6, the water inlet holes 1051 are uniformly spaced along the circumferential direction, and a plurality of water inlet holes 1051 uniformly distributed along the circumferential direction are disposed at an oblique angle to the radial direction (the direction in which the second direction Y extends), so that the cooling medium entering the cooling channel 130 forms a swirling flow, thereby enhancing the fluid disturbance in the cooling channel 130, further reducing the flow dead zone, and enhancing the convective heat transfer.
In some embodiments, a second flow rate V in the present application 2 For the flow rate of the cooling medium in the water inlet 1051, a second flow rate V 2 In the range of 4m/s to 12m/s, and further, the jet velocity may be maintained at 7m/s to 9m/s. The flow velocity of the cooling medium in the cooling channel 130 is 5 m/s-15 m/s, and the turbulence caused by the high-speed jet flow can destroy the boundary layer formed when the cooling medium flows along the heat exchange wall surface, so that a stagnant flow dead zone can not be formed in the cooling channel 130, the convective heat exchange efficiency is improved, and the service life of the cooling jacket is prolonged.
In the cooling jacket 1 of the present application, the cooling channel 130 forms a slit through the flow guiding portion 1042 connected to one end of the third cooling wall 1041, so that the cooling medium flows along one side of the end 102, and the flow velocity of the cooling medium in the cooling channel 130 is increased, in some specific embodiments, the width of the slit is 1 mm-3 mm, and the structure of the water inlet 1051 and the flow guiding portion 1042 that are obliquely arranged is matched, so that the cooling medium passing through the water inlet 1051 flows into the cooling channel 130 in a high-speed jet manner, so as to reduce the flow dead zone.
In some embodiments, as shown in fig. 3, a first buffer chamber 140 is provided between the first connection portion 105, the flow guiding portion 1042, the first cooling wall 101 and the end portion 102, the width of the first buffer chamber 140 is greater than the width of the cooling channel 130, and the first buffer chamber 140 buffers the cooling medium in the water inlet 1051, so that the local pressure is not excessively high. In this application, the cooling water fed from the water inlet 1051 is partially decelerated in the buffer chamber 140, and then enters the cooling passage 130, and the velocity is gradually increased.
In some embodiments, the flow guiding portion 1042 is an annular flow guiding block structure, the flow guiding portion 1042 is filled in the accommodating cavity 100, the flow channel structure of the cooling medium sent into the cooling cavity is changed, the flow dead zone is reduced, and the service life of the gasification burner 3 is prolonged.
As shown in fig. 7, in some embodiments, a second connection portion 106 is disposed between the flow guiding portion 1042 and the second cooling wall 103, and the second connection portion 106 has a water outlet 1061. In some embodiments, the water outlets 1061 are evenly spaced along the circumference.
In some embodiments, the second buffer chamber 150 is enclosed between the flow guiding portion 1042, the second connecting portion 106 and the second cooling wall 103, the width of the second buffer chamber 150 (the second direction Y is the width direction of the second buffer chamber 150) is also larger than the width of the cooling channel 130, and the arrangement of the second buffer chamber 150 avoids the local retention of the cooling medium after heat exchange and avoids the existence of a heat exchange dead zone. In some embodiments, the second buffer chamber 150 is specifically surrounded by the protruding portion 1043 provided on the flow guiding portion 1042 and the second cooling wall 103 and the second connecting portion 106. In some embodiments, the first connecting portion 105, the second connecting portion 106, and the guiding portion 1042 are formed by integral molding, which increases the structural strength.
As a preferred embodiment, the second connection portion 106 and the water outlet 1061 provided on the second connection portion 106 may be replaced by a swirl vane, which is opposite to the first central axis O 1 The included angle of (2) is 30-60 degrees, preferably 45 degrees, so that the cooling medium enters the water outlet channel 120 in a rotational flow manner, and a dead zone with gas residues nearby the water outlet hole 1061 is avoided.
In some embodiments, support fins 107 are disposed between the deflector 1042 and the end 102, the support fins 107 being located within the cooling channel 130 and against the end 102. The support fins 107 can be used for supporting the end 102 to avoid the influence of too small partial gap between the end 102 and the flow guiding portion 1042 on the flow of the cooling medium, and can improve the flow form of the cooling medium when flowing through, increase the area of convective heat transfer, increase the convective heat transfer coefficient, and further improve the heat transfer effect of the cooling jacket.
In some embodiments, the support fins 107 have a plurality, and the plurality of support fins 107 are evenly spaced along the circumferential direction of the cooling channel 130.
As a preferred embodiment, the structure of the supporting fins 107 is as shown in fig. 4, and the cross section of the supporting fins 107 is V-shaped, so that a vortex can be formed in the tail region of the supporting fins 107, and the convection heat exchange between the cooling medium and the jacket wall surface is further enhanced. In some alternative embodiments, the cross-sectional shape of the supporting fin 107 may also be annular or linear, which is more convenient for manufacturing, simple in structure and easy to implement. The material of the supporting fin 107 may be the same as that of the guide portion 1042, so as to facilitate manufacturing. Preferably, the support fins 107 may be integrally formed with the guide portions 1042 to enhance the structural strength of the connection portions of the support fins 107 and the guide portions 1042. As another preferred embodiment, the end 102 may be fixedly connected to the flow guiding portion 1042 by welding, or the end 102 may be integrally formed with the flow guiding portion 1042 by additive manufacturing.
In other embodiments, the cross-section of the support fins 107 is in a straight shape, as shown in FIG. 5, a plurality of the straight support fins 107 and the second central axis O of the cooling jacket 1 2 Is arranged at a certain angle, such as 30-60 degrees, so that when the cooling medium flows in the cooling channel 130 in a rotational flow manner, the original flow direction of the cooling medium in the cooling channel 130 can be maintained while the heat exchange of the cooling medium is enhanced, and the flow resistance is reduced.
The embodiment of the present application also provides a gasification burner 3 including a nozzle 2, the outer periphery of the nozzle 2 being fitted with the cooling jacket 1 described in the embodiment of the present application. The cooling jacket 1 can prolong the service life of the nozzle 2 under the high-temperature and high-pressure environment, as shown in fig. 1 or 2, the nozzle 2 is provided with a first spray head 201, the outlet of the nozzle 2 is used for spraying fuel and combustion improver, and the cooling jacket 1 is arranged around the nozzle 2 and used for exchanging heat with the surrounding high-temperature environment, so that the purpose of protecting the gasification burner 3 is realized.
Specifically, the nozzle 2 has a first medium passage 210, and a second medium passage 220 is formed between the first medium passage 210 and the cooling jacket 1, that is, an annular space between the cooling jacket 1 and the first medium passage 210, and the second medium passage 220 is formed. The first medium channel 210 and the second medium channel 220 may be used to spray fuel and combustion improver, respectively, but any one of the first medium channel 210 and the second medium channel 220 may be used as a channel for conveying a desired medium, i.e. the first medium channel 210 may be used as a fuel nozzle, the second medium channel 220 may be used as a combustion improver nozzle, or the first medium channel 210 may be used as a combustion improver nozzle, and the second medium channel 220 may be used as a fuel nozzle.
Further, the first medium passage 210 may be located closer to the inside of the gasification burner 3 than the second medium passage 220, such that the outlet of the first medium passage 210 and the outlet of the second medium passage 220 communicate to enable the fuel and the combustion improver to be sufficiently mixed and burned in the discharge port 301 of the gasification burner 3.
In some embodiments, the fuel may include solid fuels such as coal fines, liquid fuels such as coal water slurry, residuum, tar, and gaseous fuels such as natural gas, coke oven gas. The combustion improver can comprise oxygen-containing gas such as air, oxygen and the like, and preferably, the oxygen can be high-concentration pure oxygen or oxygen with a small amount of steam. When the fuel is light fuel such as diesel oil, the outlet of the first medium channel 210 or the second medium channel 220 can be replaced by an atomization nozzle, so that the fuel and the combustion improver can enter the gasifier after being strongly atomized and mixed at the discharge hole 301, and then are subjected to combustion gasification reaction.
As shown in fig. 2, a second nozzle 202 is further disposed between the first medium channel 210 and the second medium channel 220 of the gasification burner 3, the second nozzle 202 has a third medium channel 230, and the third medium channel 230 is used for ejecting steam, so that fuel and combustion improver ejected through the outlets of the first medium channel 210 and the second medium channel 220 can not be mixed immediately in the discharge port 301, the mixed combustion reaction of the fuel and the combustion improver is delayed, and a flame high-temperature area is pushed away from the head of the gasification burner 3, thereby playing the roles of protecting the head of the gasification burner 3 and prolonging the service life.
Further, a fourth medium channel, a fifth medium channel and the like can be further arranged in the gasification burner 3, so that fuel and combustion improver can be sprayed out in a grading manner, and the full reaction of the fuel is facilitated.
Embodiments of the present application further provide a method of cooling gasification burner 3 comprising:
the cooling medium flows into the cooling jacket 1 from the water inlet passage 110, flows into the cooling passage 130 in the form of high-speed jet through the water inlet holes 1051, and the jet speed of the cooling medium injected into the cooling passage 130 from the water inlet holes 1051 is 4m/s to 12m/s, preferably 7m/s to 9m/s.
The cooling medium enters the cooling channel 130 from the water inlet 1051, the flow velocity of the cooling medium in the cooling channel 130 is 5 m/s-15 m/s, preferably 9 m/s-12 m/s, and the turbulence caused by the high-speed jet flow can destroy the boundary layer formed when the cooling medium flows along the heat exchange wall surface, so that a stagnant flow dead zone can not be formed in the cooling channel 130, the convective heat exchange efficiency is improved, and the service life of the cooling jacket 1 and the gasification burner 3 is prolonged.
When the cooling medium enters the cooling channel between the flow guiding part 1042 and the second cooling wall 103, the cooling medium has a third flow velocity V 3 Third flow velocity V 3 From 3m/s to 10m/s, preferably from 5m/s to 7m/s, and then the cooling medium is sent from the water outlet hole 1061 to the water outlet passage 120 and sent from the water outlet passage 120.
The first medium channel 210 is fed with fuel, the second medium channel 220 is fed with combustion improver, the third medium channel 230 is fed with steam, the fuel fed from the first medium channel 210, the combustion improver fed from the second medium channel 220 and the steam fed from the third medium channel 230 are mixed and combusted at the discharge port 301.
In other embodiments, a plurality of medium channels may be provided in the present application to stage the combustion improver and fuel out, facilitating the full combustion of the fuel. For example, a fourth medium passage may be provided between the first medium passage 210 and the third medium passage 230, a fifth medium passage may be provided between the second medium passage 220 and the third medium passage 230, fuel may be fed through the third medium passage 230, combustion improver may be fed through the first medium passage 210 and the second medium passage 220, steam may be fed through the fourth medium passage and the fifth medium passage, and the fed fuel, combustion improver and steam may be mixed at the discharge port, and then the fuel and combustion improver may be mixed at the discharge port 301.
In the foregoing embodiments, the descriptions of the embodiments are emphasized, and for parts of one embodiment that are not described in detail, reference may be made to related descriptions of other embodiments.
The foregoing has outlined some of the more detailed description of a cooling jacket, gasification burner and cooling method provided by the examples of the present application, wherein specific examples are provided herein to illustrate the principles and embodiments of the present application, the above examples being provided solely to assist in the understanding of the methods of the present application and the core ideas thereof; meanwhile, those skilled in the art will have variations in the specific embodiments and application scope in light of the ideas of the present application, and the present description should not be construed as limiting the present application in view of the above.
Claims (14)
1. A cooling jacket, comprising:
a first stave (101);
-an end portion (102), said end portion (102) being connected to said first stave (101);
a second cooling wall (103), wherein the second cooling wall (103) is connected with one side of the end part (102) far away from the first cooling wall (101), and the first cooling wall (101), the end part (102) and the second cooling wall (103) are enclosed into a containing cavity (100);
a spacer (104), the spacer (104) being disposed within the receiving chamber (100), the spacer (104) isolating the receiving chamber (100) from the flow path; the spacer (104) comprises a third cooling wall (1041) and a flow guiding part (1042) which are connected with each other, and the flow channel is provided with a water inlet channel (110), a cooling channel (130) and a water outlet channel (120) which are communicated in sequence;
-said water inlet channel (110) is formed between said first cooling wall (101) and said third cooling wall (1041); the water outlet channel (120) is formed between the second cooling wall (103) and the third cooling wall (1041); a cooling channel (130) is formed among the end part (102), the flow guiding part (1042), the first cooling wall (101) and the second cooling wall (103);
a cooling medium is fed from the water inlet channel (110) to the cooling channel (130), and then the cooling medium is fed from the water outlet channel (120)The cooling medium has a first flow velocity V in the cooling channel (130) 1 m/s, the cooling medium having a second flow velocity V before entering the cooling channel (130) 2 m/s, the first flow velocity V 1 And the second flow velocity V 2 The method meets the following conditions: v is not less than 1 1 -V 2 ≤3。
2. The cooling jacket according to claim 1, characterized in that the flow guiding portion (1042) is connected to the first cooling wall (101) by a first connection portion (105), the first connection portion (105) having a number of water inlet holes (1051), the water inlet channel (110) being in communication with the cooling channel (130) through the water inlet holes (1051); the cooling jacket has a first central axis (O 1 ) The water inlet hole (1051) and the first central axis (O) 1 ) The device is provided with a first included angle, and the angle of the first included angle is 20-60 degrees.
3. The cooling jacket of claim 2, wherein the second flow rate V 2 For the flow rate of the cooling medium in the water inlet hole (1051), the second flow rate V 2 The range of (2) is 4m/s to 12m/s.
4. A cooling jacket according to claim 3, wherein the first flow velocity V 1 The range of (2) is 5m/s to 15m/s.
5. The cooling jacket according to claim 1, characterized in that the width of the cooling channels (130) is 1-3 mm.
6. The cooling jacket according to claim 2, characterized in that a first buffer chamber (140) is provided between the first connection portion (105), the flow guiding portion (1042), the first cooling wall (101) and the end portion (102), the first buffer chamber (140) being located between the water inlet hole (1051) and the cooling channel (130).
7. The cooling jacket according to claim 1, characterized in that the flow guide (1042) is of annular flow guide block construction.
8. The cooling jacket according to claim 1, characterized in that a second connection part (106) is arranged between the flow guiding part (1042) and the second cooling wall (103), the second connection part (106) is provided with a plurality of water outlet holes (1061), and the cooling channel (130) is communicated with the water outlet channel (120) through the water outlet holes (1061).
9. The cooling jacket according to claim 8, characterized in that a second buffer chamber (150) is formed between the second connection portion (106), the second cooling wall (103) and the flow guiding portion (1042), the width of the second buffer chamber (150) being larger than the width of the cooling channel (130).
10. Cooling jacket according to claim 1, characterized in that between the deflector (1042) and the end (102) support fins (107) are provided.
11. Cooling jacket according to claim 10, characterized in that the support fins (107) are V-shaped, annular or in-line in cross section.
12. The cooling jacket according to claim 8, characterized in that the second connection (106) is a swirl vane.
13. A gasification burner comprising a nozzle (2), the outer circumference of the nozzle (2) being fitted with a cooling jacket (1) according to any one of claims 1-10.
14. A method of cooling a gasification burner, comprising:
the first medium is sent out from the first medium channel (210);
the second medium is sent out from the second medium channel (220), and the first medium and the second medium are mixed and combusted at a discharge hole (301) of the nozzle (2);
cooling water is sent into the cooling channel (130) from the water inlet channel (110), and the cooling water in the cooling channel (130) is sent out through the water outlet channel (120);
the cooling medium has a first flow velocity V in the cooling channel (130) 1 m/s, the cooling medium having a second flow velocity V before entering the cooling channel (130) 2 m/s, the first flow velocity V 1 And the second flow velocity V 2 The method meets the following conditions: v is not less than 1 1 -V 2 ≤3。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311658954.7A CN117736772A (en) | 2023-12-05 | 2023-12-05 | Cooling jacket, gasification burner and cooling method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311658954.7A CN117736772A (en) | 2023-12-05 | 2023-12-05 | Cooling jacket, gasification burner and cooling method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117736772A true CN117736772A (en) | 2024-03-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311658954.7A Pending CN117736772A (en) | 2023-12-05 | 2023-12-05 | Cooling jacket, gasification burner and cooling method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117736772A (en) |
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2023
- 2023-12-05 CN CN202311658954.7A patent/CN117736772A/en active Pending
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