CN117536725A - Combustion chamber for combined heat and power system based on Stirling engine and implementation method of combustion chamber - Google Patents
Combustion chamber for combined heat and power system based on Stirling engine and implementation method of combustion chamber Download PDFInfo
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- CN117536725A CN117536725A CN202311578026.XA CN202311578026A CN117536725A CN 117536725 A CN117536725 A CN 117536725A CN 202311578026 A CN202311578026 A CN 202311578026A CN 117536725 A CN117536725 A CN 117536725A
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- 238000002485 combustion reaction Methods 0.000 title claims abstract description 48
- 238000000034 method Methods 0.000 title claims abstract description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 81
- 238000001816 cooling Methods 0.000 claims abstract description 31
- 238000009413 insulation Methods 0.000 claims abstract description 15
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 67
- 239000003546 flue gas Substances 0.000 claims description 67
- 239000000498 cooling water Substances 0.000 claims description 20
- 239000007789 gas Substances 0.000 claims description 10
- 238000007599 discharging Methods 0.000 claims description 6
- 238000010438 heat treatment Methods 0.000 claims description 5
- 239000000779 smoke Substances 0.000 claims description 2
- 238000003466 welding Methods 0.000 description 3
- 230000007423 decrease Effects 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 238000013139 quantization Methods 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02G—HOT GAS OR COMBUSTION-PRODUCT POSITIVE-DISPLACEMENT ENGINE PLANTS; USE OF WASTE HEAT OF COMBUSTION ENGINES; NOT OTHERWISE PROVIDED FOR
- F02G1/00—Hot gas positive-displacement engine plants
- F02G1/04—Hot gas positive-displacement engine plants of closed-cycle type
- F02G1/043—Hot gas positive-displacement engine plants of closed-cycle type the engine being operated by expansion and contraction of a mass of working gas which is heated and cooled in one of a plurality of constantly communicating expansible chambers, e.g. Stirling cycle type engines
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02G—HOT GAS OR COMBUSTION-PRODUCT POSITIVE-DISPLACEMENT ENGINE PLANTS; USE OF WASTE HEAT OF COMBUSTION ENGINES; NOT OTHERWISE PROVIDED FOR
- F02G1/00—Hot gas positive-displacement engine plants
- F02G1/04—Hot gas positive-displacement engine plants of closed-cycle type
- F02G1/043—Hot gas positive-displacement engine plants of closed-cycle type the engine being operated by expansion and contraction of a mass of working gas which is heated and cooled in one of a plurality of constantly communicating expansible chambers, e.g. Stirling cycle type engines
- F02G1/053—Component parts or details
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02G—HOT GAS OR COMBUSTION-PRODUCT POSITIVE-DISPLACEMENT ENGINE PLANTS; USE OF WASTE HEAT OF COMBUSTION ENGINES; NOT OTHERWISE PROVIDED FOR
- F02G1/00—Hot gas positive-displacement engine plants
- F02G1/04—Hot gas positive-displacement engine plants of closed-cycle type
- F02G1/043—Hot gas positive-displacement engine plants of closed-cycle type the engine being operated by expansion and contraction of a mass of working gas which is heated and cooled in one of a plurality of constantly communicating expansible chambers, e.g. Stirling cycle type engines
- F02G1/053—Component parts or details
- F02G1/055—Heaters or coolers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02G—HOT GAS OR COMBUSTION-PRODUCT POSITIVE-DISPLACEMENT ENGINE PLANTS; USE OF WASTE HEAT OF COMBUSTION ENGINES; NOT OTHERWISE PROVIDED FOR
- F02G1/00—Hot gas positive-displacement engine plants
- F02G1/04—Hot gas positive-displacement engine plants of closed-cycle type
- F02G1/043—Hot gas positive-displacement engine plants of closed-cycle type the engine being operated by expansion and contraction of a mass of working gas which is heated and cooled in one of a plurality of constantly communicating expansible chambers, e.g. Stirling cycle type engines
- F02G1/053—Component parts or details
- F02G1/057—Regenerators
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H1/00—Water heaters, e.g. boilers, continuous-flow heaters or water-storage heaters
- F24H1/22—Water heaters other than continuous-flow or water-storage heaters, e.g. water heaters for central heating
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H9/00—Details
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H9/00—Details
- F24H9/18—Arrangement or mounting of grates or heating means
- F24H9/1809—Arrangement or mounting of grates or heating means for water heaters
- F24H9/1832—Arrangement or mounting of combustion heating means, e.g. grates or burners
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Air Supply (AREA)
Abstract
The invention discloses a combustion chamber for a combined heat and power system based on a Stirling engine and an implementation method thereof, wherein the combustion chamber comprises: the combustion chamber assembly comprises an outer cylinder body, and a heat exchanger, a water cooling jacket and a heat insulation layer which are axially arranged in the outer cylinder body, wherein the heat exchanger is arranged at one end of the outer cylinder body, the heat insulation layer is arranged at the other end of the outer cylinder body and is used for being connected with a Stirling engine body, and the water cooling jacket is arranged between the heat exchanger and the heat insulation layer; the burner is arranged in the outer cylinder and positioned at the inner side of the heat exchanger, and a gap is reserved between the burner and the water cooling jacket; the adjusting piece is arranged between the burner and the outer cylinder body and is used for adjusting the size of a gap between the burner and the water cooling jacket. According to the invention, the integrated design of the heat supply and the power supply system is realized, the volume power density of the system is improved, and meanwhile, the power supply and the heat supply proportion can be actively adjusted.
Description
Technical Field
The invention relates to the technical field of burner equipment, in particular to a combustion chamber for a combined heat and power system based on a Stirling engine and an implementation method thereof.
Background
The Stirling cogeneration system is an energy device based on a Stirling engine and integrating heating and power generation. The Stirling cogeneration system comprises a heat supply system and a power supply system, high-temperature flue gas generated by the Stirling engine enters a heat exchanger of the heat supply system to heat a medium so as to provide heat energy, and the Stirling engine converts heat of a heat source into kinetic energy to drive a motor to generate power so as to provide electric energy.
The existing heat and power combined supply system based on the Stirling engine does not adopt an integrated design, so that the system is large in volume, waste in heat and low in volume power density; moreover, the existing Stirling cogeneration system cannot realize active adjustment of heat supply and power supply proportion, so that the heat and power proportion cannot be reasonably distributed according to the change of the demand at any time, and energy waste is caused.
Therefore, there is a need to design a combustion chamber for a combined heat and power system based on a Stirling engine and a method for implementing the same to solve the above problems.
Disclosure of Invention
Aiming at the technical problems, the invention aims to provide a combustion chamber for a combined heat and power system based on a Stirling engine and an implementation method thereof, which realize the integrated design of a heat supply and power supply system, improve the volume power density of the system and realize the active adjustment of the power supply and heat supply proportion.
In order to achieve the above object, the present invention provides a combustion chamber for a combined heat and power system based on a stirling engine, comprising:
the combustion chamber assembly comprises an outer cylinder body, and a heat exchanger, a water cooling jacket and a heat insulation layer which are axially arranged in the outer cylinder body, wherein the heat exchanger is arranged at one end of the outer cylinder body, the heat insulation layer is arranged at the other end of the outer cylinder body and is used for being connected with a Stirling engine body, and the water cooling jacket is arranged between the heat exchanger and the heat insulation layer;
the burner is arranged in the outer cylinder and positioned at the inner side of the heat exchanger, and a gap is reserved between the burner and the water cooling jacket;
the adjusting piece is arranged between the burner and the outer cylinder body and is used for adjusting the size of a gap between the burner and the water cooling jacket, so that the flow ratio of high-temperature flue gas generated by the burner to flow into the Stirling engine heater and directly flow into the heat exchanger is adjusted.
In some embodiments, the outer cylinder is provided with a water inlet, a water outlet and an air outlet, the water inlet is connected with one end of the heat exchanger and is used for cooling water to enter the heat exchanger, the water outlet is connected with the other end of the heat exchanger and is used for discharging hot water after heat exchange of the heat exchanger, and the air outlet is used for discharging high-temperature flue gas generated by the burner.
In some embodiments, a plurality of the air outlet holes are arranged at intervals along the circumferential direction of the outer cylinder body;
an exhaust ring pipe is fixed on the outer wall of the outer cylinder body, a flue gas collection chamber is formed in the inner space of the exhaust ring pipe, and a plurality of air outlet holes are respectively communicated with the flue gas collection chamber;
the exhaust ring pipe is further provided with an air outlet which is communicated with the flue gas collection chamber and is used for being externally connected with an exhaust pipe.
In some embodiments, the heat exchanger comprises a plurality of heat exchange tubes, the plurality of heat exchange tubes are respectively arranged along the circumferential direction of the outer cylinder body, one end of each heat exchange tube is communicated with the water inlet, and the other end of each heat exchange tube is communicated with the water outlet.
In some embodiments, the heat exchange tubes are arranged in two rows and along the circumferential direction of the outer cylinder body, and a plurality of heat exchange fins are fixedly connected between two adjacent heat exchange tubes, and the heat exchange fins adopt a fan-shaped structure and are uniformly distributed among the heat exchange tubes.
In some embodiments, the water jacket is provided with a high temperature flue gas flow passage for high temperature flue gas circulation and a cooling water flow passage for cooling water circulation;
the heat insulation layer is of an annular structure, and is clamped between the outer cylinder body and the Stirling engine body.
In some embodiments, the burner comprises a burner flange, a burner body and a heat insulating layer, wherein the burner flange is fixedly connected with the burner body, the burner body is arranged in the outer cylinder, the burner flange is arranged at the end part of the outer cylinder and is detachably connected with the outer cylinder, and the heat insulating layer is clamped between the burner body and the outer cylinder.
In some embodiments, the burner flange is provided with a water outlet main pipe interface, and the position of the water outlet main pipe interface corresponds to the position of the water outlet of the outer cylinder body;
the burner comprises a burner main body, a plurality of swirl plates and a plurality of swirl holes, wherein the swirl plates are arranged on the burner main body and surround the central shaft of the burner main body;
the burner body is internally provided with a burner inner cavity, and a burner outer cavity is formed between the inner wall and the outer wall of the burner body.
In some embodiments, the adjustment member is a circular washer sandwiched between an end of the outer barrel and the burner flange;
the burner comprises a burner main body, a burner flange, a water cooling jacket and a water cooling jacket, wherein one end of the burner main body, which is far away from the burner flange, is provided with a convex part structure which is in a horn mouth shape, a concave part structure is arranged at a corresponding position in the water cooling jacket, and a gap is reserved between the concave part structure and the convex part structure;
the thickness of the circular gasket is adjustable, so that the size of a gap between the concave part structure and the convex part structure is adjustable, and the heat supply and power supply proportion is adjusted.
According to another aspect of the present invention, there is further provided a method for implementing a combustion chamber for a stirling engine-based cogeneration system, as defined in any one of the preceding claims, comprising the steps of:
a part of combustible mixed gas is fully premixed through a swirl plate, is injected into the inner cavity of the combustor for full combustion, and the other part of combustible mixed gas enters the outer cavity of the combustion chamber after passing through a swirl hole and then enters the inner cavity of the combustion chamber for combustion, so that high-temperature smoke is generated;
part of high-temperature flue gas flows into a Stirling engine heater through a flue gas flow passage of the water cooling sleeve, the heater absorbs heat and then drives a motor to generate power, then the heat flows back to the heat exchanger, the other part of high-temperature flue gas directly flows into the heat exchanger through a gap between the burner and the outer cylinder body, cooling water in the heat exchanger is heated by the two parts of converged high-temperature flue gas, and the flue gas after heat exchange enters a flue gas collecting chamber and is discharged through a gas outlet;
cooling water enters the heat exchanger through the water inlet, exchanges heat with high-temperature flue gas outside the heat exchanger, and hot water after heat exchange is discharged through the water outlet and enters the heating system;
the adjusting piece adjusts the gap between the burner and the outer cylinder body, and then adjusts the flow ratio of high-temperature flue gas generated by the burner flowing into the Stirling engine heater and directly flowing into the heat exchanger, so that the active adjustment of the proportion distribution of heat supply and power supply of the cogeneration system is realized.
Compared with the prior art, the combustion chamber for the combined heat and power system based on the Stirling engine and the implementation method thereof have the following beneficial effects:
in the invention, the combustion chamber for the combined heat and power system based on the Stirling engine is a highly integrated combustion chamber with adjustable heat and power supply proportion, and the tube-fin heat exchanger is directly integrated in the circumferential direction of the combustion chamber, so that the heat loss along the way is greatly reduced; the adjusting piece is a circular gasket, the thickness of the adjusting piece is adjustable, and the proportion of flue gas entering the heat exchanger and the Stirling engine heater can be controlled, so that the heat supply and power supply proportion can be controlled and adjusted.
Drawings
The above features, technical features, advantages and implementation of the present invention will be further described in the following description of preferred embodiments with reference to the accompanying drawings in a clear and easily understood manner.
FIG. 1 is a schematic view of a combustion chamber for a Stirling engine based cogeneration system in accordance with a preferred embodiment of the invention;
fig. 2 is a schematic structural view of a burner according to a preferred embodiment of the present invention.
Reference numerals illustrate:
the burner comprises a combustible mixed gas 001, high-temperature flue gas 002, cooling water 003, hot water 004, a combustion chamber assembly 100, an outer cylinder 110, a flue gas collection chamber 111, an air outlet 112, an air inlet 113, an air outlet 114, a heat exchanger 120, a heat exchange tube 121, heat exchange fins 122, a water cooling jacket 130, a heat insulation layer 140, a burner 200, a burner flange 210, a burner main body 220, swirl vanes 221, swirl holes 222, a burner inner cavity 223, a burner outer cavity 224, a heat insulation layer 230 and an adjusting piece 300.
Detailed Description
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following description will explain the specific embodiments of the present invention with reference to the accompanying drawings. It is evident that the drawings in the following description are only examples of the invention, from which other drawings and other embodiments can be obtained by a person skilled in the art without inventive effort.
For simplicity of the drawing, only the parts relevant to the invention are schematically shown in each drawing, and they do not represent the actual structure thereof as a product. Additionally, in order to simplify the drawing for ease of understanding, components having the same structure or function in some of the drawings are shown schematically with only one of them, or only one of them is labeled. Herein, "a" means not only "only this one" but also "more than one" case.
It should be further understood that the term "and/or" as used in this specification and the appended claims refers to any and all possible combinations of one or more of the associated listed items, and includes such combinations.
In this context, it should be noted that the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected, unless explicitly stated or limited otherwise; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
In addition, in the description of the present application, the terms "first," "second," and the like are used merely to distinguish between descriptions and are not to be construed as indicating or implying relative importance.
In one embodiment, referring to fig. 1 and 2 of the specification, the combustion chamber for a combined heat and power system based on a stirling engine provided by the present invention includes: the combustor assembly 100, the burner 200 and the adjusting member 300. The combustor assembly 100 comprises an outer cylinder 110, a heat exchanger 120 axially arranged in the outer cylinder 110, a water-cooled jacket 130 and a heat insulating layer 140, wherein the heat exchanger 120 is arranged at one end of the outer cylinder 110, the heat insulating layer 140 is arranged at the other end of the outer cylinder 110, the heat insulating layer 140 is used for being connected with a Stirling engine body, and the water-cooled jacket 130 is arranged between the heat exchanger 120 and the heat insulating layer 140. The burner 200 is disposed in the outer cylinder 110 and inside the heat exchanger 120, with a gap between the burner 200 and the water jacket 130. The adjusting member 300 is disposed between the burner 200 and the outer cylinder 110, and the adjusting member 300 is used for adjusting the gap between the burner 200 and the water jacket 130, so as to adjust the flow ratio of the high-temperature flue gas 002 generated by the burner 200 flowing into the Stirling engine heater and directly flowing into the heat exchanger 140.
In the embodiment, the heat exchanger 120 is directly integrated in the combustion chamber for the combined heat and power system of the Stirling engine, and the high-temperature flue gas 002 can be directly heated by the heat exchanger 120 in the outer cylinder 110 without transportation through a pipeline after being generated, so that the system volume is reduced, the integration level of the system is improved, and meanwhile, the along-path heat loss is reduced; and, through setting up the clearance size between adjustment piece 300 adjustment combustor 200 and the water cooling jacket 130, realize that heat supply and power supply proportion quantization is controllable, and can be along with the environmental variation custom regulation, reach the purpose of make full use of the energy.
In one embodiment, referring to fig. 1 and 2 of the specification, the outer cylinder 110 is in a hollow column structure, the heat exchanger 120 is arranged along the inner wall of the outer cylinder 110, the outer cylinder 110 is provided with a water inlet 113, a water outlet 114 and an air outlet, the water inlet 113 is connected with one end of the heat exchanger 120 for cooling water 003 to enter the heat exchanger 120, the water outlet 114 is connected with the other end of the heat exchanger 120 for discharging hot water 004 after heat exchange of the heat exchanger 120, and the air outlet is used for discharging high-temperature flue gas 002 generated by the burner 200.
Further, a plurality of air outlet holes are formed, penetrate through the outer cylinder 110, and are circumferentially arranged at intervals along the outer cylinder 110. An exhaust ring pipe is fixed on the outer wall of the outer cylinder 110, the exhaust ring pipe surrounds the outer cylinder 110 along the circumferential direction, the inner space of the exhaust ring pipe forms a flue gas collection chamber 111, and a plurality of air outlet holes are respectively communicated with the flue gas collection chamber 111. The exhaust ring pipe is also provided with an air outlet 112, the air outlet 112 is communicated with the flue gas collection chamber 111, and the air outlet 112 is used for externally connecting an exhaust pipe.
It should be noted that the specific structure of the outer cylinder 110 is described in the drawings corresponding to the specification, and other structures may be adopted in the actual use process, and the air outlet 112 may also adopt other structures to realize air exhaust, which is only for better illustrating the present invention, and should not be construed as limiting the present invention.
In one embodiment, referring to fig. 1 and 2 of the drawings, the heat exchanger 120 may be fixed inside the outer cylinder 110 by welding or screwing. The heat exchanger 120 includes a plurality of heat exchange tubes 121, the plurality of heat exchange tubes 121 are respectively arranged along the circumference of the outer cylinder 110, one end of each heat exchange tube 121 is communicated with the water inlet 113, and the other end is communicated with the water outlet 114.
Further, the heat exchanger 120 is a tube fin type heat exchanger, the heat exchange tubes 121 are arranged in two rows along the circumference of the outer cylinder 110, a plurality of heat exchange fins 122 are fixedly connected between two adjacent heat exchange tubes 121, and the heat exchange fins 122 are in a fan-shaped structure and are uniformly distributed among the heat exchange tubes 121. By directly integrating the tube-fin heat exchanger in the circumferential direction of the combustion chamber, the heat loss along the way is greatly reduced, and the tube-fin heat exchanger has the advantage of high heat exchange efficiency.
Further, the water jacket 130 may be fixed to the inside of the outer cylinder 110 by welding or screwing. The water cooling jacket 130 is provided with a high-temperature flue gas flow passage for circulating the high-temperature flue gas 002 and a cooling water flow passage for circulating the cooling water 003. The heat insulating layer 140 has a ring-shaped structure, and the heat insulating layer 140 is interposed between the outer cylinder 110 and the body of the stirling engine.
In one embodiment, referring to fig. 1 and 2 of the drawings, the burner 200 includes a burner flange 210, a burner body 220, and a heat insulating layer 230, the burner flange 210 is fixedly connected with the burner body 220, the burner body 220 is disposed in the outer cylinder 110, the burner flange 210 is disposed at an end of the outer cylinder 110 and detachably connected with the outer cylinder 110 by bolts, and the heat insulating layer 230 is interposed between the burner body 220 and the outer cylinder 110.
The burner flange 210 is provided with a water outlet manifold interface, the position of which corresponds to the position of the water outlet 114 of the outer vessel 110. The burner main body 220 is provided with a plurality of swirl plates 221 and a plurality of swirl holes 222, the swirl plates 221 are arranged around the central axis of the burner main body 220, and the swirl holes 222 are uniformly distributed along the circumference of the burner main body 220. The burner body 220 has a burner inner cavity 223 in the interior thereof, and a burner outer cavity 224 is formed between the inner and outer walls of the burner body 220.
Further, the adjusting member 300 is a circular gasket, which is sandwiched between the end of the outer cylinder 110 and the burner flange 210. The thickness of the circular gasket is adjustable, so that the size of a gap between the burner 200 and the water cooling jacket 130 is adjustable, and the flow ratio of the high-temperature flue gas 002 generated by the burner 200 to flow into the Stirling engine heater and directly into the heat exchanger 140 can be adjusted.
Further, the burner main body 220 has a protrusion structure at one end far from the burner flange 210, the protrusion structure is bell-mouth-shaped, a recess structure is provided at a corresponding position inside the water jacket 130, and a gap is provided between the recess structure and the protrusion structure. Through adjusting the thickness of circular gasket for the clearance size between concave part structure and the convex part structure is adjustable, and then adjusts heat supply and power supply proportion.
According to another aspect of the present invention, referring to fig. 1 and 2 of the accompanying drawings, the present invention further provides a method for implementing a combustion chamber for a combined heat and power system based on a stirling engine, as defined in any one of the above, comprising the steps of:
a part of the combustible mixed gas 001 is fully premixed through the swirl plate 221, is injected into the inner cavity 223 of the combustor for full combustion, and the other part of the combustible mixed gas 001 enters the outer cavity 224 of the combustion chamber after passing through the swirl hole 222 and then enters the inner cavity 223 of the combustion chamber for combustion, so that high-temperature flue gas 002 is generated;
part of the high-temperature flue gas 002 flows into a Stirling engine heater through a flue gas flow passage of the water cooling jacket 130, the heater absorbs heat and then drives a motor to generate power, then the power flows back to the heat exchanger 120, the other part of the high-temperature flue gas 002 directly flows into the heat exchanger 120 through a gap between the burner 200 and the outer cylinder 110, the two parts of the high-temperature flue gas 002 converged heat cooling water 003 in the heat exchanger 120, and the flue gas after heat exchange enters the flue gas collection chamber 111 and is discharged through the air outlet 112;
cooling water 003 enters the heat exchanger 120 through the water inlet 113 to exchange heat with high-temperature flue gas 002 outside the heat exchanger 120, and hot water 004 after heat exchange is discharged through the water outlet 114 and enters a heating system;
the adjusting part 300 adjusts the gap between the burner 200 and the water cooling jacket 130, and further adjusts the flow ratio of the high-temperature flue gas 002 generated by the burner 200 flowing into the Stirling engine heater and directly flowing into the heat exchanger 120, so as to realize the active adjustment of the heat supply and power supply ratio distribution of the cogeneration system.
Specifically, referring to fig. 1 of the specification, the outer cylinder 110 is connected with the heat exchanger 120 and the water jacket 130 by welding, the heat exchanger 120 includes a heat exchange tube 121 and heat exchange fins 122, and the heat exchange fins 122 are welded on the heat exchange tube 121, so that the heat exchange area is increased. Cooling water 003 enters the heat exchange tube 121 through the water inlet 113, exchanges heat with high-temperature flue gas 002 outside the heat exchange tube 121, and hot water 004 after heat exchange is discharged through the water outlet 114 and enters a heating system. The heat exchange tube 121 is internally provided with cooling water 003, and is externally provided with high-temperature flue gas 002, and the high-temperature flue gas 002 enters the flue gas collection chamber 111 after passing through the heat exchanger 120 and is discharged through the air outlet 112.
Referring to fig. 1 of the drawings, the burner flange 210 is welded to the burner body 220, and the swirl plates 221 and the swirl holes 222 are uniformly welded to the burner body 220 in the circumferential direction.
Referring to fig. 1 and 2 of the specification, a part of the combustible mixture 001 is fully premixed through the swirl plate 221, is injected into the inner cavity 223 of the burner for full combustion, and the other part of the combustible mixture 001 enters the outer cavity 224 of the burner after passing through the swirl hole 222 and then enters the inner cavity 223 of the burner for combustion, so that high-temperature flue gas 002 is generated. A part of high-temperature flue gas 002 flows into a Stirling engine heater through a flue gas flow channel of the water cooling sleeve 130, and the heater absorbs heat and then drives a motor to generate power, and then flows back to the heat exchanger 120; another part of the high temperature flue gas 002 directly flows into the heat exchanger 120 through the gap between the burner 200 and the outer cylinder 110. The two portions of the converging high temperature flue gas 002 heat the cooling water 003 in the heat exchange tube 121 to provide heat. The heat exchanged flue gas enters the flue gas collection chamber 111 and is then discharged through the gas outlet 112.
Referring to fig. 1 of the drawings, the adjusting member 300 is a circular spacer having a certain thickness and is installed between the burner flange 210 and the outer cylinder 110 for adjusting the size of the gap between the burner 200 and the water jacket 130. The size of the gap between the burner 200 and the water cooling jacket 130 is adjusted by adjusting the thickness of the circular gasket between the burner 100 and the burner 200, so that the flow ratio of the high-temperature flue gas 002 flowing into the Stirling engine heater and directly flowing into the heat exchanger 120 is adjusted, and the active adjustment of the heat supply and power supply ratio distribution of the cogeneration system is realized. The thickness of the circular gasket increases, the gap between the burner 200 and the water jacket 130 increases, the flow rate of the high-temperature flue gas 002 directly flowing into the heat exchanger 120 increases, the heat supply ratio increases, and the flow rate of the high-temperature flue gas 002 flowing into the heater of the Stirling engine decreases, and the power supply ratio decreases.
In the foregoing embodiments, the descriptions of the embodiments are focused on, and the parts of a certain embodiment that are not described or depicted in detail may be referred to in the related descriptions of other embodiments.
It should be noted that the above embodiments can be freely combined as needed. The foregoing is merely a preferred embodiment of the present invention and it should be noted that modifications and adaptations to those skilled in the art may be made without departing from the principles of the present invention, which are intended to be comprehended within the scope of the present invention.
Claims (10)
1. A combustion chamber for a combined heat and power system based on a stirling engine, comprising:
the combustion chamber assembly comprises an outer cylinder body, and a heat exchanger, a water cooling jacket and a heat insulation layer which are axially arranged in the outer cylinder body, wherein the heat exchanger is arranged at one end of the outer cylinder body, the heat insulation layer is arranged at the other end of the outer cylinder body and is used for being connected with a Stirling engine body, and the water cooling jacket is arranged between the heat exchanger and the heat insulation layer;
the burner is arranged in the outer cylinder and positioned at the inner side of the heat exchanger, and a gap is reserved between the burner and the water cooling jacket;
the adjusting piece is arranged between the burner and the outer cylinder body and is used for adjusting the size of a gap between the burner and the water cooling jacket, so that the flow ratio of high-temperature flue gas generated by the burner to flow into the Stirling engine heater and directly flow into the heat exchanger is adjusted.
2. A combustion chamber for a Stirling engine-based cogeneration system as claimed in claim 1, wherein,
the outer cylinder is provided with a water inlet, a water outlet and an air outlet, wherein the water inlet is connected with one end of the heat exchanger and used for cooling water to enter the heat exchanger, the water outlet is connected with the other end of the heat exchanger and used for discharging hot water after heat exchange of the heat exchanger, and the air outlet is used for discharging high-temperature flue gas generated by the burner.
3. A combustion chamber for a Stirling engine-based cogeneration system as claimed in claim 2, wherein,
the plurality of air outlet holes are arranged at intervals along the circumferential direction of the outer cylinder body;
an exhaust ring pipe is fixed on the outer wall of the outer cylinder body, a flue gas collection chamber is formed in the inner space of the exhaust ring pipe, and a plurality of air outlet holes are respectively communicated with the flue gas collection chamber;
the exhaust ring pipe is further provided with an air outlet which is communicated with the flue gas collection chamber and is used for being externally connected with an exhaust pipe.
4. A combustion chamber for a Stirling engine-based cogeneration system as claimed in claim 2, wherein,
the heat exchanger comprises a plurality of heat exchange tubes, the heat exchange tubes are respectively arranged along the circumferential direction of the outer cylinder body, one end of each heat exchange tube is communicated with the water inlet, and the other end of each heat exchange tube is communicated with the water outlet.
5. A combustion chamber for a Stirling engine-based cogeneration system as claimed in claim 4 wherein,
the heat exchange tubes are arranged in two rows along the circumferential direction of the outer cylinder body, a plurality of heat exchange fins are fixedly connected between two adjacent heat exchange tubes, and the heat exchange fins adopt a fan-shaped structure and are uniformly distributed among the heat exchange tubes.
6. A combustion chamber for a Stirling engine-based cogeneration system as claimed in claim 1, wherein,
the water cooling jacket is provided with a high-temperature flue gas flow passage and a cooling water flow passage, the high-temperature flue gas flow passage is used for circulating high-temperature flue gas, and the cooling water flow passage is used for circulating cooling water;
the heat insulation layer is of an annular structure, and is clamped between the outer cylinder body and the Stirling engine body.
7. A combustion chamber for a Stirling engine based cogeneration system according to any one of claims 1-6, wherein,
the burner comprises a burner flange, a burner main body and a heat insulation layer, wherein the burner flange is fixedly connected with the burner main body, the burner main body is arranged in the outer cylinder body, the burner flange is arranged at the end part of the outer cylinder body and is detachably connected with the outer cylinder body, and the heat insulation layer is clamped between the burner main body and the outer cylinder body.
8. A combustion chamber for a Stirling engine-based cogeneration system as claimed in claim 7 wherein,
the burner flange is provided with a water outlet main pipe interface, and the position of the water outlet main pipe interface corresponds to the position of the water outlet of the outer cylinder body;
the burner comprises a burner main body, a plurality of swirl plates and a plurality of swirl holes, wherein the swirl plates are arranged on the burner main body and surround the central shaft of the burner main body;
the burner body is internally provided with a burner inner cavity, and a burner outer cavity is formed between the inner wall and the outer wall of the burner body.
9. A combustion chamber for a Stirling engine-based cogeneration system as claimed in claim 7 wherein,
the adjusting piece is a circular gasket which is clamped between the end part of the outer cylinder body and the burner flange;
the burner comprises a burner main body, a burner flange, a water cooling jacket and a water cooling jacket, wherein one end of the burner main body, which is far away from the burner flange, is provided with a convex part structure which is in a horn mouth shape, a concave part structure is arranged at a corresponding position in the water cooling jacket, and a gap is reserved between the concave part structure and the convex part structure;
the thickness of the circular gasket is adjustable, so that the size of a gap between the concave part structure and the convex part structure is adjustable, and the heat supply and power supply proportion is adjusted.
10. A method of implementing a combustion chamber for a stirling engine-based cogeneration system in accordance with any one of claims 1 to 9, comprising the steps of:
a part of combustible mixed gas is fully premixed through a swirl plate, is injected into the inner cavity of the combustor for full combustion, and the other part of combustible mixed gas enters the outer cavity of the combustion chamber after passing through a swirl hole and then enters the inner cavity of the combustion chamber for combustion, so that high-temperature smoke is generated;
part of high-temperature flue gas flows into a Stirling engine heater through a flue gas flow passage of the water cooling sleeve, the heater absorbs heat and then drives the motor to generate power, then the heat flows back to the heat exchanger, the other part of high-temperature flue gas directly flows into the heat exchanger through a gap between the burner and the water cooling sleeve, cooling water in the heat exchanger is heated by the two parts of converged high-temperature flue gas, and the flue gas after heat exchange enters a flue gas collecting chamber and is discharged through a gas outlet;
cooling water enters the heat exchanger through the water inlet, exchanges heat with high-temperature flue gas outside the heat exchanger, and hot water after heat exchange is discharged through the water outlet and enters the heating system;
the adjusting piece adjusts the gap between the burner and the water cooling jacket, and then adjusts the flow ratio of high-temperature flue gas generated by the burner flowing into the Stirling engine heater and directly flowing into the heat exchanger, so that the active adjustment of the proportion distribution of heat supply and power supply of the cogeneration system is realized.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311578026.XA CN117536725A (en) | 2023-11-24 | 2023-11-24 | Combustion chamber for combined heat and power system based on Stirling engine and implementation method of combustion chamber |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311578026.XA CN117536725A (en) | 2023-11-24 | 2023-11-24 | Combustion chamber for combined heat and power system based on Stirling engine and implementation method of combustion chamber |
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| Publication Number | Publication Date |
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| CN117536725A true CN117536725A (en) | 2024-02-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311578026.XA Pending CN117536725A (en) | 2023-11-24 | 2023-11-24 | Combustion chamber for combined heat and power system based on Stirling engine and implementation method of combustion chamber |
Country Status (1)
| Country | Link |
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| CN (1) | CN117536725A (en) |
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2023
- 2023-11-24 CN CN202311578026.XA patent/CN117536725A/en active Pending
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