CN113237096A - Combustion chamber structure with heat exchanger - Google Patents
Combustion chamber structure with heat exchanger Download PDFInfo
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- CN113237096A CN113237096A CN202110469731.0A CN202110469731A CN113237096A CN 113237096 A CN113237096 A CN 113237096A CN 202110469731 A CN202110469731 A CN 202110469731A CN 113237096 A CN113237096 A CN 113237096A
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- wall
- heat exchanger
- guide
- flame tube
- tube
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- 238000002485 combustion reaction Methods 0.000 title claims abstract description 51
- 238000002347 injection Methods 0.000 claims abstract description 36
- 239000007924 injection Substances 0.000 claims abstract description 36
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 54
- 239000003546 flue gas Substances 0.000 claims description 54
- 239000007789 gas Substances 0.000 claims description 12
- 239000000779 smoke Substances 0.000 claims description 4
- 239000007921 spray Substances 0.000 claims description 4
- 230000009471 action Effects 0.000 abstract description 7
- 230000008646 thermal stress Effects 0.000 abstract description 7
- 230000000694 effects Effects 0.000 description 16
- 230000008859 change Effects 0.000 description 6
- 239000000945 filler Substances 0.000 description 4
- 239000012530 fluid Substances 0.000 description 3
- 239000000446 fuel Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000010248 power generation Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000008602 contraction Effects 0.000 description 2
- 239000007800 oxidant agent Substances 0.000 description 2
- 230000001590 oxidative effect Effects 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- 238000000889 atomisation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000872 buffer Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007123 defense Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23R—GENERATING COMBUSTION PRODUCTS OF HIGH PRESSURE OR HIGH VELOCITY, e.g. GAS-TURBINE COMBUSTION CHAMBERS
- F23R3/00—Continuous combustion chambers using liquid or gaseous fuel
- F23R3/28—Continuous combustion chambers using liquid or gaseous fuel characterised by the fuel supply
- F23R3/283—Attaching or cooling of fuel injecting means including supports for fuel injectors, stems, or lances
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23R—GENERATING COMBUSTION PRODUCTS OF HIGH PRESSURE OR HIGH VELOCITY, e.g. GAS-TURBINE COMBUSTION CHAMBERS
- F23R3/00—Continuous combustion chambers using liquid or gaseous fuel
- F23R3/42—Continuous combustion chambers using liquid or gaseous fuel characterised by the arrangement or form of the flame tubes or combustion chambers
- F23R3/58—Cyclone or vortex type combustion chambers
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
The invention discloses a combustion chamber structure with a heat exchanger, which comprises the heat exchanger and a flame tube embedded in the heat exchanger; the heat exchanger comprises a heat exchanger inner wall and a heat exchanger outer wall, and a heat exchanging part is arranged between the heat exchanger inner wall and the heat exchanger outer wall; the flame tube comprises a flame tube inner wall, a flame tube outer wall and a flame tube bottom plate; an oil injection ring, an oil injection nozzle and a second oil injection pipe are arranged on the inner wall of the heat exchanger; the heat exchange part is provided with a first oil filling pipe; an oil filling port is formed in the outer wall of the heat exchanger; the outer wall of the flame tube is provided with a guide pipe; according to the invention, the guide pipe is sleeved outside the oil nozzle, so that the sprayed oil is ensured to directly enter the flame tube through the guide pipe, the oil is ensured to completely enter the flame tube to participate in combustion, and the combustion is ensured to only occur in the flame tube; the first oil injection pipe is fixed on the heat exchanging part in a multi-point interval fixing mode, and the situation that the first oil injection pipe is pulled to break under the action of thermal stress due to the temperature gradient of the heat exchanging part is avoided.
Description
Technical Field
The invention relates to the field of combustion chambers, in particular to a combustion chamber structure with a heat exchanger.
Background
The gas turbine is a power machine widely applied to various industrial fields such as aviation, ships, electric power and the like, and plays a vital role in the development of national economy. Compared with the other gas turbines, the gas turbine has many advantages, has great advantages in the aspects of fuel consumption rate, noise, emission and vibration, can be used for traditional distributed power generation and various power generation modes such as grid-connected power generation and the like, is suitable for cities, and is widely popularized in remote areas by virtue of the advantages of convenience in carrying and reliability in work; except for transportation such as sea and land frontier defense, the gas turbine is applied to various fields such as new energy automobiles, electromechanical machining, metal materials and the like, so that the gas turbine is concerned by various military and major countries.
Conventional gas turbines also have the following disadvantages:
1. the oil injection pipe is attached to the wall surface of the heat exchanger, the oil pipe is in contact with the wall surface of the heat exchanger, but the wall surface of the heat exchanger has a temperature gradient, so that the oil injection pipe is pulled to be broken under the action of thermal stress;
2. the high-temperature gas flowing out of the turbine is directly discharged to the atmospheric environment, so that the energy is wasted, and the heat efficiency of the whole machine is not high. Meanwhile, the temperature of air entering the combustion chamber is low, the temperature rise of the combustion chamber is not high, and the subsequent working capacity of airflow is influenced;
3. the combustion chamber has small space, short staying time of airflow in the flame tube, bad combustion structure in the flame tube, and local overhigh temperature, which easily causes local overhigh thermal stress and deformation and damage of the flame tube.
Based on the above situation, the present invention provides a combustion chamber structure with a heat exchanger, which can effectively solve the above problems.
Disclosure of Invention
The invention aims to provide a combustion chamber structure with a heat exchanger. According to the combustion chamber structure with the heat exchanger, the oil injection ring is used as a transfer station of an oil way, so that oil pressure is stabilized, and the oil is uniformly sprayed out of the oil injection nozzle, so that a good oil injection effect is ensured; the guide pipe is sleeved outside the oil nozzle, so that the sprayed oil is ensured to directly enter the flame tube through the guide pipe, the oil is ensured to completely enter the flame tube to participate in combustion, no oil is leaked out, and the combustion is ensured to only occur in the flame tube; the first oil filling pipe is fixed on the heat exchanging part in a multi-point interval fixing mode, and the situation that the first oil filling pipe is pulled to break under the action of thermal stress due to the fact that the temperature of the heat exchanging part is inconsistent is avoided.
The invention is realized by the following technical scheme:
a combustion chamber structure with a heat exchanger comprises the heat exchanger and a flame tube embedded in the heat exchanger;
the heat exchanger comprises a heat exchanger inner wall and a heat exchanger outer wall, and a heat exchanging part is arranged between the heat exchanger inner wall and the heat exchanger outer wall;
the flame tube comprises a flame tube inner wall, a flame tube outer wall and a flame tube bottom plate, and a gas flowing cavity is formed among the flame tube inner wall, the flame tube outer wall and the flame tube bottom plate;
an oil injection ring is fixed on the inner side of the inner wall of the heat exchanger, and a plurality of oil injection nozzles are annularly arranged on one side of the oil injection ring, which is close to the flame tube bottom plate; a first oil injection pipe is arranged on one side of the heat exchange part close to the flame tube bottom plate; one end of the first oil filling pipe penetrates through the outer wall of the heat exchanger, and an oil filling opening is formed in the outer wall of the heat exchanger; the other end of the first oil injection pipe is communicated with the oil injection ring through a second oil injection pipe embedded in the inner wall of the heat exchanger; the first oil filling pipe comprises a plurality of groups of upper convex sections and lower concave sections which are sequentially and alternately connected, the lower concave sections are fixed on the heat exchanging part, and the upper convex sections are overhead on the heat exchanging part;
the outer wall of the flame tube is annularly provided with a plurality of guide pipes corresponding to the oil spray nozzles, and the guide pipes are sleeved on the oil spray nozzles.
According to the invention, the oil injection ring is used as a transfer station of an oil way, so that oil pressure is stabilized, and the oil is uniformly sprayed out from the oil injection nozzle, thereby ensuring a better oil injection effect; the guide pipe is sleeved outside the oil nozzle, so that sprayed oil is ensured to directly enter the flame tube through the guide pipe, the oil is ensured to completely enter the flame tube to participate in combustion, no oil seeps out, and the combustion is ensured to only occur in the flame tube; the first oil filling pipe is fixed on the heat exchanging part in a multi-point interval fixing mode, and the situation that the first oil filling pipe is pulled to break under the action of thermal stress due to the fact that the temperature of the heat exchanging part is inconsistent is avoided.
Preferably, a plurality of air outlets are annularly arranged on the inner wall of one side of the inner wall of the heat exchanger at equal intervals, and each air outlet is provided with an air outlet cavity in the inner wall of the heat exchanger; a plurality of flue gas inlets are annularly arranged on the inner wall of the other side of the inner wall of the heat exchanger at equal intervals, and each flue gas inlet is provided with a flue gas inlet cavity in the inner wall of the heat exchanger; the inner wall of the heat exchanger is provided with a baffle plate used for guiding the flow direction of the flue gas at one side of the flue gas inlet.
Preferably, a plurality of bumps are arranged on the inner side of the outer wall of the heat exchanger corresponding to the plurality of air outlets, air inlets are arranged at one ends of the bumps, which are far away from the air outlets, and each air inlet is provided with an air inlet cavity in each bump; the outer wall of the heat exchanger, the heat exchanging part and the plurality of the lugs form a plurality of flue gas outlet cavities.
Preferably, cold runner sets and hot runner sets with equal number are arranged in the heat exchange part; the cold runner set and the hot runner set are alternately arranged at equal intervals in the circumferential direction of the heat exchanging part; each cold runner set comprises a plurality of cold runners which are arranged in parallel in the vertical direction, each cold runner is a spiral runner, and each cold runner is communicated with the air inlet cavity and the air outlet cavity; each hot runner group comprises a plurality of hot runners which are arranged in parallel in the vertical direction, each hot runner is a spiral runner, and each hot runner is communicated with the smoke inlet cavity and the smoke outlet cavity.
Preferably, the helix angle of each cold runner is 360 °; the cold runner comprises an air inlet elbow communicated to the air inlet cavity, an air outlet elbow communicated to the air outlet cavity and a first spiral runner connected with the air inlet elbow and the air outlet elbow; the first spiral flow channel is formed by connecting a plurality of first variable flow channel sections; the cross sections of the two ends of the first variable flow passage section are circular, and the cross section of the center of the first variable flow passage section is square;
the spiral angle of each hot runner is 360 degrees; the hot runner comprises a flue gas inlet elbow communicated to the flue gas inlet cavity, a flue gas outlet elbow communicated to the flue gas outlet cavity and a second spiral flow channel connected with the flue gas inlet elbow and the flue gas outlet elbow; the second spiral flow channel is formed by connecting a plurality of second variable flow channel sections; the cross sections of the two ends of the second variable flow passage section are circular, and the cross section of the center of the second variable flow passage section is square;
the number of the cold runner sets and the number of the hot runner sets are six; the number of the cold runners in each set of the cold runner sets is sixteen; the number of the hot runners in each hot runner group is sixteen.
Preferably, the inner wall of the flame tube is conical, and the top point of the inner wall of the flame tube is connected with an air outlet; the outer wall of the flame tube is annularly provided with a plurality of first guide holes, each first guide hole comprises a first guide inner hole and a first guide outer hole, each first guide inner hole is coaxial with the corresponding first guide outer hole, each first guide inner hole is formed in the inner side of the outer wall of the flame tube, each first guide outer hole is correspondingly formed in the outer side of the outer wall of the flame tube, and a flow guide channel is formed in each first guide inner hole and each first guide outer hole; the flame tube bottom plate is provided with a plurality of air inlets.
Preferably, the included angle theta between the first guide hole and the horizontal plane is 30-45 degrees; the diameter of the first guide hole is 1-6 mm; the end face of the air inlet end of the first guide outer hole is an inclined plane.
Preferably, the guide tube comprises a guide inner tube and a guide outer tube; the guide inner tube is arranged on the inner side of the outer wall of the flame tube, the guide outer tube is correspondingly arranged on the outer side of the outer wall of the flame tube, a flow guide channel is formed inside the guide inner tube and the guide outer tube, and a guide tube air inlet is formed in one side, close to the bottom plate of the flame tube, of the guide outer tube; one side of the guide inner pipe, which is close to the flame tube bottom plate, is connected with a spiral pipe; and the included angle alpha between the spiral pipe and the circle tangent is 30-45 degrees.
Preferably, a plurality of second guide holes are annularly arranged on the inner wall of the flame tube, and the included angle gamma between each second guide hole and the horizontal plane is 50-70 degrees; and a plurality of third guide holes are annularly arranged on one side of the outer wall of the flame tube, which is close to the bottom plate of the flame tube, and the included angle beta between each third guide hole and the tangent of the circle is 20-40 degrees.
Compared with the prior art, the invention has the following advantages and beneficial effects:
according to the combustion chamber structure with the heat exchanger, the oil injection ring is used as a transfer station of an oil way, so that oil pressure is stabilized, and the oil is uniformly sprayed out of the oil injection nozzle, so that a good oil injection effect is ensured; the guide pipe is sleeved outside the oil nozzle, so that the sprayed oil is ensured to directly enter the flame tube through the guide pipe, the oil is ensured to completely enter the flame tube to participate in combustion, no oil is leaked out, and the combustion is ensured to only occur in the flame tube; the first oil filling pipe is fixed on the heat exchanging part in a multi-point interval fixing mode, and the situation that the first oil filling pipe is pulled to break under the action of thermal stress due to the fact that the temperature of the heat exchanging part is inconsistent is avoided.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic cross-sectional view of the present invention;
FIG. 3 is a schematic view of a portion of the structure of FIG. 2 at D;
FIG. 4 is a schematic structural view of a heat exchanger according to the present invention;
FIG. 5 is a schematic view of another angle of the heat exchanger according to the present invention;
FIG. 6 is a schematic top view of the heat exchanger of the present invention;
FIG. 7 is a cross-sectional view taken at A-A of FIG. 6;
FIG. 8 is a cross-sectional view taken at B-B of FIG. 6;
FIG. 9 is a cross-sectional view taken at C-C of FIG. 6;
FIG. 10 is a schematic view of the construction of a cold runner and a hot runner of portions of the present invention;
FIG. 11 is a schematic cross-sectional view of FIG. 10;
FIG. 12 is a schematic structural view of a first flow variation segment according to the present invention;
FIG. 13 is a schematic structural view of a second flow variation channel segment according to the present invention;
FIG. 14 is a schematic structural view of a flame tube according to the present invention;
FIG. 15 is a schematic top view of the flame tube of the present invention;
FIG. 16 is a schematic view of a portion of the structure of FIG. 15 at E;
FIG. 17 is a schematic side view of the flame tube of the present invention;
FIG. 18 is a schematic cross-sectional view of a flame tube according to the present invention.
Detailed Description
In order that those skilled in the art will better understand the technical solutions of the present invention, the following description of the preferred embodiments of the present invention is provided in conjunction with specific examples, but it should be understood that the drawings are for illustrative purposes only and should not be construed as limiting the patent; for the purpose of better illustrating the embodiments, certain features of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted. The positional relationships depicted in the drawings are for illustrative purposes only and are not to be construed as limiting the present patent.
Example 1:
as shown in fig. 1 to 18, a combustion chamber structure with a heat exchanger includes a heat exchanger 1 and a flame tube 2 embedded in the heat exchanger 1;
the heat exchanger 1 comprises a heat exchanger inner wall 11 and a heat exchanger outer wall 12, and a heat exchanging part 13 is arranged between the heat exchanger inner wall 11 and the heat exchanger outer wall 12;
the flame tube 2 comprises a flame tube inner wall 21, a flame tube outer wall 22 and a flame tube bottom plate 23, and a gas flowing cavity is formed among the flame tube inner wall 21, the flame tube outer wall 22 and the flame tube bottom plate 23;
an oil injection ring 14 is fixed on the inner side of the heat exchanger inner wall 11, and a plurality of oil injection nozzles 141 are annularly arranged on one side of the oil injection ring 14, which is close to the flame tube bottom plate 23; a first oil filling pipe 142 is arranged on one side of the heat exchanging part 13 close to the flame tube bottom plate 23; one end of the first oil filling pipe 142 penetrates through the heat exchanger outer wall 12, and an oil filling port 143 is formed in the heat exchanger outer wall 12; the other end of the first filler pipe 142 and the oil injection ring 14 are communicated with each other through a second filler pipe 144 embedded in the inner wall 11 of the heat exchanger; the first oil filling pipe 142 comprises a plurality of groups of upper convex sections and lower concave sections which are sequentially and alternately connected, the lower concave sections are fixed on the heat exchanging part 13, and the upper convex sections are overhead on the heat exchanging part 13;
a plurality of guide pipes 222 corresponding to the oil nozzles 141 are annularly arranged on the outer wall 22 of the flame tube, and the guide pipes 222 are sleeved on the oil nozzles 141.
According to the invention, the oil injection ring 14 is used as a transfer station of an oil way, so that oil pressure is stabilized, and the oil is uniformly sprayed out from the oil injection nozzle 141, thereby ensuring a better oil injection effect; the guide pipe 222 is sleeved outside the oil nozzle 141, so that the sprayed oil is ensured to directly enter the flame tube 2 through the guide pipe 222, the oil is ensured to completely enter the flame tube 2 to participate in combustion, no oil seeps out, and the combustion is ensured to only occur in the flame tube 2; the first filler pipe 142 is fixed to the heat exchanging part 13 in a multi-point interval fixing manner, so that the first filler pipe 142 is prevented from being pulled and broken under the action of thermal stress due to inconsistent temperature of the heat exchanging part 13.
Further, in another embodiment, a plurality of air outlets 111 are equidistantly arranged on the inner wall of one side of the heat exchanger inner wall 11, and each air outlet 111 is provided with an air outlet cavity 112 in the heat exchanger inner wall 11; a plurality of flue gas inlets 113 are annularly arranged on the inner wall of the other side of the inner wall 11 of the heat exchanger at equal intervals, and each flue gas inlet 113 is provided with a flue gas inlet cavity 114 in the inner wall 11 of the heat exchanger; the heat exchanger inner wall 11 is further provided with a baffle 115 for guiding the flow direction of the flue gas at the side where the flue gas inlet 113 is arranged.
The air outlet cavity 112 buffers the input air, so that the combustion effect of the combustion chamber can be prevented from being influenced when the air is sprayed out of the cold runner, the buffered air can not influence the combustion effect of the combustion chamber when the buffered air is sprayed out of the air outlet cavity, and sufficient air can be ensured when the combustion chamber is combusted; through the flue gas inlet 113 and the baffle 115, flue gas generated by combustion in the combustion chamber enters the flue gas inlet cavity 114 and then enters the hot runner 134 through the flue gas inlet cavity 114, so that excessive flue gas cannot be left in the combustion chamber, the air content in the combustion chamber is ensured to be sufficient, and the combustion effect is improved.
Further, in another embodiment, a plurality of protrusions 121 are arranged inside the heat exchanger outer wall 12 corresponding to the plurality of air outlets 111, an air inlet 122 is arranged at an end of the protrusion 121 facing away from the air outlets 111, and each air inlet 122 forms an air inlet cavity 123 in the protrusion 121; the outer wall 12 of the heat exchanger, the heat exchanging part 13 and the plurality of bumps 121 form a plurality of flue gas outlet cavities 124.
The air inlet cavities 123 and the flue gas outlet cavities 124 which are alternately arranged on the inner side of the heat exchanger outer wall 12 are formed by arranging a plurality of the lugs 121 at equal intervals in the circumferential direction of the inner side of the heat exchanger outer wall 12; the opening directions of the air inlet cavity 123 and the flue gas outlet cavity 124 are set to be opposite, so that the flue gas which is just discharged is prevented from being sucked by the air inlet cavity 123, and a good air inlet effect of the air inlet cavity 123 is ensured.
Further, in another embodiment, an equal number of cold runner sets 131 and hot runner sets 132 are arranged in the heat exchanging portion 13; the cold runner set 131 and the hot runner set 132 are alternately arranged at equal intervals in the circumferential direction of the heat exchanging part 13; each cold runner set 131 comprises a plurality of cold runners 133 which are arranged in parallel in the vertical direction, each cold runner 133 is a spiral runner, and each cold runner 133 is communicated with the air inlet cavity 123 and the air outlet cavity 112; each hot runner group 132 comprises a plurality of hot runners 134 arranged in parallel in the vertical direction, the hot runners 134 are spiral runners, and each hot runner 134 is communicated with the flue gas inlet cavity 114 and the flue gas outlet cavity 124.
Through the cold runner set 131 and the hot runner set 132 which are alternately arranged in the heat exchanging part 13, the flue gas generated by combustion in the flame tube 2 is discharged from the hot runner set 132, the air required by combustion in the flame tube 2 is input into the flame tube 2 from the cold runner set 131, and the air is directly adopted to carry out heat exchange and temperature reduction on the flue gas in the flowing process of the air and the flue gas, so that the temperature of the flue gas during emission can be reduced without using other temperature reducing media or temperature reducing structures, the temperature of the air required to be input into the flame tube 2 is increased, and the heat loss of the combustion chamber to the outside is effectively reduced; the cold runner 133 and the hot runner 134 are both spiral runners, so that the heat exchange process is prolonged, and a good heat exchange effect is ensured.
Further, in another embodiment, the helix angle of each of the cold runners 133 is 360 °; the cold runner 133 comprises an air inlet elbow 1331 communicated to the air inlet cavity 123, an air outlet elbow 1332 communicated to the air outlet cavity 112, and a first spiral runner 1333 connecting the air inlet elbow 1331 and the air outlet elbow 1332; the first spiral flow passage 1333 is formed by connecting a plurality of first variable flow passage sections 1334; the cross sections of both ends of the first variable flow path section 1334 are circular, and the cross section of the center of the first variable flow path section 1334 is square;
through the air inlet elbow 1331, the cold runner 133 can be better communicated to the air inlet cavity 123, so as to ensure better air inlet effect; through the air outlet elbow 1332, the cold runner 133 can be better communicated to the air outlet cavity 112, so as to ensure a better air outlet effect.
The spiral angle of each hot runner 134 is 360 degrees; the hot runner 134 comprises a flue gas inlet elbow 1341 communicated with the flue gas inlet cavity 114, a flue gas outlet elbow 1342 communicated with the flue gas outlet cavity 124, and a second spiral flow passage 1343 connected with the flue gas inlet elbow 1341 and the flue gas outlet elbow 1342; the second spiral flow passage 1343 is formed by connecting a plurality of second variable flow passage segments 1344; the cross sections of the two ends of the second variable flow passage section 1344 are circular, and the cross section of the center of the second variable flow passage section 1344 is square;
through the flue gas inlet elbow 1341, the hot runner 134 can be better communicated with the flue gas inlet cavity 114, so that a better gas inlet effect is ensured; through the air outlet elbow 1332, the hot runner 134 can be better communicated to the flue gas outlet cavity 124, so as to ensure a better air outlet effect.
The spiral angles of the cold runner 133 and the hot runner 134 are both 360 degrees, so that the cold runner 133 and the hot runner 134 are ensured to have enough heat exchange strokes, and the heat dissipation of the combustion chamber to the outside is effectively reduced.
The first variable flow passage section 1334 and the second variable flow passage section 1344 are both tapered flow passages, the cross sections of the two ends are circular, the cross section of the middle is square, namely, the transition from the circular cross section of one end to the square cross section of the middle is performed, and then the transition from the square cross section to the circular cross section of the other end is performed. In the process of section change, fluid on the section in the flow channel is forced to be redistributed, disturbance heat exchange among the fluids is increased, the temperature distribution of the fluid on the section in the flow channel is more uniform, and the heat exchange effect is better; in addition, the first change runner section 1334 and the second change runner section 1344 take thermal expansion and cold contraction of the runner into consideration, a space is left for runner deformation, a circular section can be changed into a square shape when being heated or bearing, and the square section can be changed towards the direction of the circular section when being heated or bearing.
The spiral angle of the first variable flow passage section 1334 and the second variable flow passage section 1344 is 2 °, that is, the first spiral flow passage 1333 is formed by 180 sections of the first variable flow passage section 1334, and the second spiral flow passage 1343 is formed by 180 sections of the second variable flow passage section 1344; the more the first change flow passage section 1334 and the second change flow passage section 1344 are, i.e. the more the change of the cross section of the flow passage is, the better the effect of resisting expansion and contraction and heat exchange is.
The cross section of the middle of the first variable flow passage section 1334 and the second variable flow passage section 1344 is square, and four sides of the square adopt concave arcs, so that the square can be better attached to a flow passage with a circular cross section.
Each of the cold runners 133 is surrounded by four of the hot runners 134, which increases the heat transfer area between the air and the flue gas. And the cold runner 133 and the hot runner 134 support each other, so that the strength of the heat exchanger is enhanced.
The number of the cold runner sets 131 and the number of the hot runner sets 132 are six; the number of cold runners 133 in each set of the cold runner sets 131 is sixteen; the number of hot runners 134 in each hot runner group 132 is sixteen.
Further, in another embodiment, the inner wall 21 of the flame tube is conical, and the top point of the inner wall 21 of the flame tube is connected with an air outlet 211; a plurality of first guide holes 221 are annularly arranged on the outer wall 22 of the flame tube, each first guide hole 221 comprises a first guide inner hole 2212 and a first guide outer hole 2211, the first guide inner hole 2212 is coaxial with the first guide outer hole 2211, the first guide inner hole 2212 is arranged on the inner side of the outer wall 22 of the flame tube, the first guide outer hole 2211 is correspondingly arranged on the outer side of the outer wall 22 of the flame tube, and a flow guide channel is formed inside the first guide inner hole 2212 and the first guide outer hole 2211; the flame tube bottom plate 23 is provided with a plurality of air inlets 231.
The first guiding hole 221 is obliquely arranged on the outer wall 22 of the flame tube, so that the airflow can spirally flow towards the outlet of the flame tube 2 along the surface of the outer wall 22 of the flame tube after entering the flame tube. Because the air current that gets into is tangential, and the air current gets into follow behind the flame holder 2 the wall of flame holder 2 flows, and an envelope surface is constituteed to these rotatory air currents, is in with flame parcel in the flame holder 2, inside high temperature flame with form a low temperature rotation air bed between the wall of flame holder 2, can be right flame holder 2 has better cooling guard action, and the tangential of air current simultaneously, in addition the drive the air current is rotatory in the flame holder 2, increases the air current and is in dwell time in the flame holder 2 is favorable to oxidant and fuel to be in fully react in the flame holder 2.
Further, in another embodiment, the included angle θ between the first guiding hole 221 and the horizontal plane is 30 ° to 45 °; the diameter of the first guide hole 221 is 1-6 mm; the end surface of the air inlet end of the first guide outer hole 2211 is an inclined surface.
The first guide outer hole 2211 and the first guide inner hole 2212 penetrate through the outer wall 22 of the flame tube, so that the momentum of airflow flowing into the flame tube 2 is increased, and the airflow penetration distance is longer; the end face of the air inlet of the first guide outer hole 2211 is chamfered, and compared with a round inlet face, the area of an air inlet is increased, so that the flow coefficient is improved, and more air flows can flow in through the open holes; the first guide hole 221 is obliquely arranged on the wall surface of the flame tube, so that airflow can spirally flow towards the outlet of the flame tube along the surface of the outer wall 22 of the flame tube after entering the flame tube; the first guiding holes 221 may be arranged side by side or staggered, and the aperture of the first guiding holes 221 may also be changed according to actual needs to match the amount of air required for combustion at different positions along the axial direction of the combustor basket 2.
Further, in another embodiment, the guide tube 222 includes a guide inner tube 2221 and a guide outer tube 2222; the guide inner tube 2221 is arranged on the inner side of the flame tube outer wall 22, the guide outer tube 2222 is correspondingly arranged on the outer side of the flame tube outer wall 22, a flow guide channel is formed inside the guide inner tube 2221 and the guide outer tube 2222, and a guide tube air inlet 2224 is formed in one side, close to the flame tube bottom plate 23, of the guide outer tube 2222; a spiral pipe 2223 is connected to one side of the guide inner pipe 2221 close to the flame tube bottom plate 23; and the included angle alpha between the spiral tube 2223 and the tangent line of the circle is 30-45 degrees.
An oil inlet is formed in one side, away from the flame tube bottom plate 23, of the guide tube 222, the air inlet 2224 is an air inlet, and oil and air act in the guide tube 222, so that an atomization effect is generated, and the combustion efficiency of the oil is improved.
Further, in another embodiment, a plurality of second guide holes 212 are annularly arranged on the inner wall 21 of the flame tube, and an included angle γ between the second guide holes 212 and a horizontal plane is 50 ° to 70 °; a plurality of third guide holes 223 are annularly arranged on one side of the flame tube outer wall 22 close to the flame tube bottom plate 23, and an included angle beta between each third guide hole 223 and a tangent line of a circle is 20-40 degrees.
The above angles are set to increase the residence time of the gas flow in the combustor basket 2, so as to facilitate the oxidant and the fuel to fully react in the combustor basket 2.
The combustion chamber structure with heat exchanger according to the present invention can be easily manufactured or used by those skilled in the art according to the description of the present invention and the attached drawings, and can produce the positive effects described in the present invention.
Unless otherwise specified, in the present invention, if there is an orientation or positional relationship indicated by terms of "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., based on the orientation or positional relationship shown in the drawings, it is only for convenience of describing the present invention and simplifying the description, rather than to indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore, the terms describing orientation or positional relationship in the present invention are for illustrative purposes only, and should not be construed as limiting the present patent, specific meanings of the above terms can be understood by those of ordinary skill in the art in light of the specific circumstances in conjunction with the accompanying drawings.
Unless expressly stated or limited otherwise, the terms "disposed," "connected," and "connected" are used broadly and encompass, for example, being fixedly connected, detachably connected, or integrally connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way, and all simple modifications and equivalent variations of the above embodiments according to the technical spirit of the present invention are included in the scope of the present invention.
Claims (9)
1. A combustion chamber structure with a heat exchanger, characterized in that: comprises a heat exchanger (1) and a flame tube (2) embedded in the heat exchanger (1);
the heat exchanger (1) comprises a heat exchanger inner wall (11) and a heat exchanger outer wall (12), and a heat exchanging part (13) is arranged between the heat exchanger inner wall (11) and the heat exchanger outer wall (12);
the flame tube (2) comprises a flame tube inner wall (21), a flame tube outer wall (22) and a flame tube bottom plate (23), and a gas flowing cavity is formed among the flame tube inner wall (21), the flame tube outer wall (22) and the flame tube bottom plate (23);
an oil injection ring (14) is fixed on the inner side of the inner wall (11) of the heat exchanger, and a plurality of oil injection nozzles (141) are annularly arranged on one side, close to the flame tube bottom plate (23), of the oil injection ring (14); a first oil filling pipe (142) is arranged on one side, close to the flame tube bottom plate (23), of the heat exchanging part (13); one end of the first oil filling pipe (142) penetrates through the heat exchanger outer wall (12) and forms an oil filling opening (143) on the heat exchanger outer wall (12); the other end of the first oil injection pipe (142) is communicated with the oil injection ring (14) through a second oil injection pipe (144) embedded in the inner wall (11) of the heat exchanger; the first oil filling pipe (142) comprises a plurality of groups of upper convex sections and lower concave sections which are sequentially and alternately connected, the lower concave sections are fixed on the heat exchanging part (13), and the upper convex sections are overhead on the heat exchanging part (13);
the outer wall (22) of the flame tube is annularly provided with a plurality of guide pipes (222) corresponding to the oil spray nozzles (141), and the guide pipes (222) are sleeved on the oil spray nozzles (141).
2. A combustion chamber structure with a heat exchanger as set forth in claim 1, wherein: a plurality of air outlets (111) are annularly arranged on the inner wall of one side of the inner wall (11) of the heat exchanger at equal intervals, and each air outlet (111) is provided with an air outlet cavity (112) in the inner wall (11) of the heat exchanger; a plurality of flue gas inlets (113) are annularly arranged on the inner wall of the other side of the inner wall (11) of the heat exchanger at equal intervals, and each flue gas inlet (113) is provided with a flue gas inlet cavity (114) in the inner wall (11) of the heat exchanger; and a baffle (115) for guiding the flow direction of the flue gas is also arranged on one side of the inner wall (11) of the heat exchanger, which is provided with the flue gas inlet (113).
3. A combustion chamber structure with a heat exchanger as set forth in claim 2, wherein: a plurality of bumps (121) are arranged on the inner side of the outer wall (12) of the heat exchanger corresponding to the plurality of air outlets (111), an air inlet (122) is arranged at one end of each bump (121) departing from the corresponding air outlet (111), and an air inlet cavity (123) is formed in each bump (121) by each air inlet (122); the heat exchanger outer wall (12), the heat exchange part (13) and the plurality of lugs (121) form a plurality of flue gas outlet cavities (124).
4. A combustion chamber structure with a heat exchanger as set forth in claim 3, wherein: cold runner sets (131) and hot runner sets (132) with equal quantity are arranged in the heat exchanging part (13); the cold runner set (131) and the hot runner set (132) are alternately arranged at equal intervals in the circumferential direction of the heat exchanging part (13); each cold runner set (131) comprises a plurality of cold runners (133) which are arranged in parallel in the vertical direction, each cold runner (133) is a spiral runner, and each cold runner (133) is communicated with the air inlet cavity (123) and the air outlet cavity (112); each hot runner group (132) comprises a plurality of hot runners (134) which are arranged in parallel in the vertical direction, each hot runner (134) is a spiral runner, and each hot runner (134) is communicated with the smoke inlet cavity (114) and the smoke outlet cavity (124).
5. The combustion chamber structure with a heat exchanger as set forth in claim 4, wherein: -the helix angle of each cold runner (133) is 360 °; the cold runner (133) comprises an air inlet elbow (1331) communicated to the air inlet cavity (123), an air outlet elbow (1332) communicated to the air outlet cavity (112), and a first spiral runner (1333) connecting the air inlet elbow (1331) and the air outlet elbow (1332); the first spiral flow passage (1333) is formed by connecting a plurality of first variable flow passage sections (1334); the cross sections of the two ends of the first variable flow passage section (1334) are circular, and the cross section of the center of the first variable flow passage section (1334) is square;
the helix angle of each hot runner (134) is 360 degrees; the hot runner (134) comprises a flue gas inlet elbow (1341) communicated with the flue gas inlet cavity (114), a flue gas outlet elbow (1342) communicated with the flue gas outlet cavity (124), and a second spiral flow channel (1343) connected with the flue gas inlet elbow (1341) and the flue gas outlet elbow (1342); the second spiral flow channel (1343) is formed by connecting a plurality of second variable flow channel sections (1344); the cross sections of the two ends of the second variable flow passage section (1344) are circular, and the cross section of the center of the second variable flow passage section (1344) is square;
the number of the cold runner sets (131) and the number of the hot runner sets (132) are six; the number of cold runners (133) in each set of the cold runner sets (131) is sixteen; the number of hot runners (134) in each of the hot runner groups (132) is sixteen.
6. A combustion chamber structure with a heat exchanger as set forth in claim 1, wherein: the inner wall (21) of the flame tube is conical, and the top point of the inner wall (21) of the flame tube is connected with an air outlet (211); the flame tube outer wall (22) is annularly provided with a plurality of first guide holes (221), each first guide hole (221) comprises a first guide inner hole (2212) and a first guide outer hole (2211), each first guide inner hole (2212) is coaxial with each first guide outer hole (2211), each first guide inner hole (2212) is formed in the inner side of the flame tube outer wall (22), each first guide outer hole (2211) is correspondingly formed in the outer side of the flame tube outer wall (22), and a flow guide channel is formed inside each first guide inner hole (2212) and each first guide outer hole (2211); the flame tube bottom plate (23) is provided with a plurality of air inlets (231).
7. The combustion chamber structure with a heat exchanger as set forth in claim 6, wherein: the included angle theta between the first guide hole (221) and the horizontal plane is 30-45 degrees; the diameter of the first guide hole (221) is 1-6 mm; the end face of the air inlet end of the first guide outer hole (2211) is an inclined plane.
8. The combustion chamber structure with a heat exchanger as set forth in claim 6, wherein: the guide tube (222) comprises a guide inner tube (2221) and a guide outer tube (2222); the guide inner tube (2221) is arranged on the inner side of the outer wall (22) of the flame tube, the guide outer tube (2222) is correspondingly arranged on the outer side of the outer wall (22) of the flame tube, a flow guide channel is formed inside the guide inner tube (2221) and the guide outer tube (2222), and a guide tube air inlet (2224) is formed in one side, close to the bottom plate (23), of the guide outer tube (2222); one side of the guide inner tube (2221) close to the flame tube bottom plate (23) is connected with a spiral tube (2223); and the included angle alpha between the spiral pipe (2223) and the tangent line of the circle is 30-45 degrees.
9. The combustion chamber structure with a heat exchanger as set forth in claim 6, wherein: a plurality of second guide holes (212) are annularly arranged on the inner wall (21) of the flame tube, and the included angle gamma between each second guide hole (212) and the horizontal plane is 50-70 degrees; a plurality of third guide holes (223) are annularly arranged on one side, close to the flame tube bottom plate (23), of the flame tube outer wall (22), and the included angle beta between each third guide hole (223) and the tangent line of the circle is 20-40 degrees.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110469731.0A CN113237096B (en) | 2021-04-28 | 2021-04-28 | Combustion chamber structure with heat exchanger |
| PCT/CN2021/136252 WO2022227582A1 (en) | 2021-04-28 | 2021-12-08 | Combustion chamber structure having heat exchanger |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110469731.0A CN113237096B (en) | 2021-04-28 | 2021-04-28 | Combustion chamber structure with heat exchanger |
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| CN113237096A true CN113237096A (en) | 2021-08-10 |
| CN113237096B CN113237096B (en) | 2024-09-06 |
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| CN202110469731.0A Active CN113237096B (en) | 2021-04-28 | 2021-04-28 | Combustion chamber structure with heat exchanger |
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| CN (1) | CN113237096B (en) |
| WO (1) | WO2022227582A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022227582A1 (en) * | 2021-04-28 | 2022-11-03 | 浙江意动科技股份有限公司 | Combustion chamber structure having heat exchanger |
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|---|---|
| WO2022227582A1 (en) | 2022-11-03 |
| CN113237096B (en) | 2024-09-06 |
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