CN110886665A - High-temperature tail gas waste heat utilization device based on Stirling engine and Stirling engine - Google Patents
High-temperature tail gas waste heat utilization device based on Stirling engine and Stirling engine Download PDFInfo
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- CN110886665A CN110886665A CN201911096008.1A CN201911096008A CN110886665A CN 110886665 A CN110886665 A CN 110886665A CN 201911096008 A CN201911096008 A CN 201911096008A CN 110886665 A CN110886665 A CN 110886665A
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- 239000007789 gas Substances 0.000 title claims abstract description 83
- 239000002918 waste heat Substances 0.000 title claims abstract description 35
- 230000007246 mechanism Effects 0.000 claims abstract description 143
- 238000009413 insulation Methods 0.000 claims abstract description 108
- 238000005338 heat storage Methods 0.000 claims abstract description 62
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 36
- 239000003546 flue gas Substances 0.000 claims abstract description 36
- 238000010438 heat treatment Methods 0.000 claims abstract description 5
- 239000012774 insulation material Substances 0.000 claims description 16
- 239000007788 liquid Substances 0.000 claims description 16
- 238000007789 sealing Methods 0.000 claims description 10
- 238000009423 ventilation Methods 0.000 claims description 8
- 230000000903 blocking effect Effects 0.000 claims description 6
- 238000012544 monitoring process Methods 0.000 claims description 4
- 238000009434 installation Methods 0.000 claims description 3
- 230000002093 peripheral effect Effects 0.000 claims description 3
- 238000005265 energy consumption Methods 0.000 abstract 1
- 239000002184 metal Substances 0.000 description 11
- 238000000034 method Methods 0.000 description 5
- 239000000523 sample Substances 0.000 description 5
- 238000002485 combustion reaction Methods 0.000 description 3
- 239000011810 insulating material Substances 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 238000012546 transfer Methods 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 2
- 230000000712 assembly Effects 0.000 description 2
- 238000000429 assembly Methods 0.000 description 2
- 239000003245 coal Substances 0.000 description 2
- 238000009833 condensation Methods 0.000 description 2
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- 239000001257 hydrogen Substances 0.000 description 2
- 229910052739 hydrogen Inorganic materials 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
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- 229920000742 Cotton Polymers 0.000 description 1
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- 239000011449 brick Substances 0.000 description 1
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- 238000004321 preservation Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
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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
- F02G5/00—Profiting from waste heat of combustion engines, not otherwise provided for
- F02G5/02—Profiting from waste heat of exhaust gases
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02C—GAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS
- F02C6/00—Plural gas-turbine plants; Combinations of gas-turbine plants with other apparatus; Adaptations of gas-turbine plants for special use
- F02C6/18—Plural gas-turbine plants; Combinations of gas-turbine plants with other apparatus; Adaptations of gas-turbine plants for special use using the waste heat of gas-turbine plants outside the plants themselves, e.g. gas-turbine power heat plants
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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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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
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- 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 high-temperature tail gas waste heat utilization device based on a Stirling engine and the Stirling engine, wherein the high-temperature tail gas waste heat utilization device based on the Stirling engine comprises: the gas guide pipe mechanism is used for conveying high-temperature tail gas; a heater mechanism for heating a working medium of the stirling machine; the heat insulation layer mechanism is arranged around the outer side of the heater mechanism; the exhaust pipe mechanism is used for exhausting high-temperature tail gas of a heat storage space formed by the heater mechanism and the heat insulation layer mechanism in an enclosing manner; the high-temperature flue gas flows to the heat storage space from the gas guide pipe mechanism to heat the heater mechanism, and the heater mechanism exchanges heat with the working medium to realize that the working medium is heated and push the piston to do work. The invention creatively utilizes the waste heat of the high-temperature flue gas to realize the operation of the Stirling engine to generate power, thereby not only reducing the thermal pollution of the high-temperature flue gas to the environment, but also reducing the energy consumption of the Stirling engine in doing work, protecting the environment and saving energy resources.
Description
Technical Field
The invention relates to the technical field of Stirling engines, in particular to a high-temperature tail gas waste heat utilization device based on a Stirling engine and the Stirling engine.
Background
The Stirling engine is used as a typical external combustion engine, when an external combustion system works, continuous combustion is carried out to avoid knocking, a working medium system is in closed circulation, high-pressure gas can be adopted to work, and the power of unit mass is improved. The method has the characteristics of low noise, high power density and high efficiency, and has good adaptability to low-grade energy sources. The existing places such as thermal power plants and brick kilns consuming fossil energy on a large scale can produce a large amount of high-temperature tail gas, can cause thermal pollution when directly discharging to the environment, currently adopts multi-stage waste heat boilers to carry out waste heat recovery, and when the price is high, the result still has most flue gas waste heat to be wasted and cause thermal pollution. Similarly, heat engines such as gas turbines also produce high temperature exhaust gas, which causes thermal pollution.
Disclosure of Invention
The invention aims to provide a high-temperature tail gas waste heat utilization device based on a Stirling engine and the Stirling engine, which creatively utilizes the waste heat of high-temperature flue gas to realize the operation of the Stirling engine to generate power, thereby not only reducing the thermal pollution of the high-temperature flue gas to the environment, but also reducing and avoiding the energy consumed by the Stirling engine to do work, protecting the environment and saving energy resources.
The technical scheme provided by the invention is as follows:
a high temperature tail gas waste heat utilization equipment based on stirling, includes:
the gas guide pipe mechanism is used for conveying high-temperature tail gas;
a heater mechanism for heating a working medium of the stirling machine;
the heat insulation layer mechanism is arranged around the outer side of the heater mechanism; and the number of the first and second groups,
the exhaust pipe mechanism is used for exhausting high-temperature tail gas of a heat storage space formed by the heater mechanism and the heat insulation layer mechanism in an enclosing manner;
high-temperature flue gas flows to the heat storage space by the gas guide pipe mechanism to heat the heater mechanism, and the heater mechanism exchanges heat with the working medium to realize that the working medium is heated and push the piston to do work.
Further preferably, the heater mechanism comprises a heat exchange tube and a heater cylinder provided with a heater hot cavity and a heater cold cavity; the heater hot cavity and the heater cold cavity are communicated through the heat exchange tube; the outer side wall of the heater cylinder and the heat insulating layer mechanism are arranged in an enclosing mode to form the heat storage space, and the heat exchange tube is arranged in the heat storage space; the gas guide pipe mechanism is communicated with the heat storage space.
Further preferably, the heater mechanism further comprises a shunt cylinder accommodated in the heat storage space; the flow distribution cylinder is communicated with the gas guide pipe mechanism, and a plurality of gas guide holes communicated with the heat storage space are formed in the side wall of the flow distribution cylinder; the heat exchange tube is arranged around the outer side of the flow distribution cylinder body.
Further preferably, each heat exchange tube comprises a cold end communicated with the heater cold cavity and a plurality of hot ends communicated with the heater hot cavity; the hot ends are respectively communicated with the cold ends; and/or the flow dividing cylinder comprises a ventilation end provided with the air guide hole and an air guide end communicated with the air guide pipe mechanism; a flame blocking ring is arranged on the periphery of the outer side wall of the flow distribution cylinder body and is arranged between the ventilation end and the air guide end; and/or fins are arranged on the outer side wall of the heat exchange tube; and/or the heater cold cavity is arranged around the outer side of the heater hot cavity.
Further preferably, the heat insulating layer mechanism is integrally formed and is provided with an installation channel for inserting the air duct mechanism; and/or the heat insulation layer mechanism comprises a heat insulation cylinder body provided with a filling cavity and a heat insulation material layer, and the heat insulation material layer is filled in the filling cavity; and/or the heat insulation layer mechanism comprises a first heat insulation layer assembly arranged around the outer periphery of the heater mechanism and a second heat insulation layer assembly arranged close to the gas guide pipe mechanism; the first thermal insulation layer assembly and the second thermal insulation layer assembly are connected to form a side wall of the heat storage space; the second heat insulation layer assembly comprises a bottom heat insulation plate, a side heat insulation plate and a bracket plate for mounting the gas guide pipe mechanism; the support plate and the bottom heat insulation plate are oppositely arranged, the side heat insulation plate is arranged between the support plate and the bottom heat insulation plate, so that the support plate, the bottom heat insulation plate and the side heat insulation plate are surrounded to form a sub heat insulation cavity, and the sub heat insulation cavity is filled with a heat insulation material layer; the gas guide pipe mechanism penetrates through the first heat insulation layer assembly and is communicated with the heat storage space.
Further preferably, the heat insulation layer mechanism also comprises a pressure shell mechanism which is arranged around the outer side of the heat insulation layer mechanism; the heat insulation layer mechanism and the pressure shell mechanism are arranged in an enclosing mode to form a heat insulation cavity.
Further preferably, the pressure shell mechanism comprises a cover plate for mounting the gas guide tube mechanism, a pressure cylinder body sleeved on the outer periphery side of the heat insulation layer mechanism, and a cylinder body flange for mounting a heater cylinder body of the heater mechanism; the cover plate is covered at one end of the pressure cylinder, the heater cylinder and the cylinder flange jointly block the other end of the pressure cylinder, and the heater cylinder is arranged on the Stirling engine through the cylinder flange; the cover plate is connected with the pressure cylinder body in a sealing mode, and the pressure cylinder body is connected with the cylinder body flange in a sealing mode.
Further preferably, one end of the heat insulating layer mechanism is connected with the cover plate through a hanger rod connecting assembly; the other end of the heat insulation layer mechanism is connected with the barrel flange through a bolt assembly; the suspender connecting assembly comprises a suspender screw and a suspender, the suspender screw is connected with the cover plate, the suspender is connected with the heat insulating layer mechanism, and the suspender screw is connected with the suspender; the bolt assembly comprises a bolt and a nut, the bolt penetrates through the barrel flange from one side of the heat insulation cavity to the outside and then is in threaded connection with the nut, and the heat insulation layer mechanism abuts against the end portion of the bolt on the side far away from the nut.
Further preferably, a temperature sensor for monitoring the temperature of the heat storage space is further included; and/or a liquid guide pipe mechanism used for guiding out the condensed liquid of the heat storage space.
The present invention also provides a stirling machine comprising:
the waste heat utilization device comprises a machine body, a heat regenerator, a cooler and any one of the high-temperature tail gas waste heat utilization devices based on the Stirling engine.
The high-temperature tail gas waste heat utilization device based on the Stirling engine and the Stirling engine provided by the invention can bring at least one of the following beneficial effects:
1. in the invention, the waste heat of high-temperature flue gas (the temperature is higher than 300 ℃) generated by burning fossil energy (such as petroleum, coal and the like) and novel energy (such as hydrogen and the like) is creatively utilized to realize the operation of the Stirling engine so as to generate power, thereby not only reducing the thermal pollution of the high-temperature flue gas to the environment, but also reducing the energy consumed by the Stirling engine to do work, protecting the environment, saving energy resources, avoiding the Stirling engine from further consuming increasingly exhausted energy resources on the earth during the operation, protecting the earth, and responding to national policies of green, environmental protection, energy saving and the like. The gas guide pipe mechanism guides the high-temperature flue gas to the heat storage space to realize heat exchange between the high-temperature flue gas and the working medium, so that the Stirling engine operates to do work; more excellent, the heat insulation layer mechanism has guaranteed the high temperature constant temperature environment in heat-retaining space, avoids the quick loss of the heat in high temperature flue gas and the working medium heat transfer process for high temperature flue gas and working medium heat transfer are abundant and thorough, have improved high temperature flue gas waste heat recovery rate, have guaranteed stability and the equilibrium of working medium heat transfer intensification in-process, have guaranteed the stability and the equilibrium of energy density when stirling machine operation.
2. In the invention, the heat exchange tube is arranged in the heat storage space, so that the stability and the balance of heat exchange are further improved, and the heat exchange area of high-temperature flue gas and working media is increased by optimally arranging a plurality of branches (hot ends) and fins of the heat exchange tube around the periphery of the flow dividing cylinder body; preferably, the flame blocking ring is arranged, so that the high-temperature flue gas is prevented from flowing towards one side of the gas guide pipe mechanism, and meanwhile, the high-temperature flue gas flows towards the horizontal direction of the heat storage space, so that the high-temperature flue gas flows in the heating pipe accessory; the heat exchange efficiency of the high-temperature flue gas and the working medium is further improved.
3. In the invention, the heat insulation layer mechanism can be integrally formed, is realized by filling the heat insulation material layer, and is formed by two spliced heat insulation layer assemblies, the structure is various, the requirements of machine types or customers of different Stirling machines can be met, and the product diversification and individuation of the invention are realized.
4. In the invention, the heat insulation cavity is formed between the pressure shell mechanism and the heat insulation layer mechanism, so that the heat insulation performance of the invention is further improved, and the constant temperature and high temperature environment of the heat storage space is further ensured. Preferably, the temperature of the heat storage space is monitored by the temperature sensor to further ensure the constant temperature and high temperature environment of the heat storage space, so that the heat exchange efficiency of the Stirling engine is ensured, and the stability and the efficiency of the operation of the Stirling engine are improved.
Drawings
The above features, technical features, advantages and implementations of the high-temperature exhaust gas waste heat utilization device based on the stirling engine and the stirling engine will be further described in a clearly understandable manner with reference to the accompanying drawings.
FIG. 1 is a schematic structural diagram of an embodiment of a high-temperature tail gas waste heat utilization device based on a Stirling engine.
The reference numbers illustrate:
100. the temperature measuring device comprises an air guide pipe mechanism, 101, an air inlet flange, 102, an air inlet outer pipe, 103, an air inlet inner pipe, 104, a temperature sensor, 105, a clamping sleeve joint, 106, a first metal gasket, 107, a second metal gasket, 108, a suspender screw, 109, a suspender, 110, a heat insulation pipe, 111, a third metal gasket and 112, a temperature measuring sleeve;
200. heater mechanism, 201, flame-blocking ring, 202, cold end, 203, hot end, 204, heater cylinder, 205, heater cold chamber, 206, heater hot chamber, 207, fourth metal gasket, 208, first rubber O-shaped ring, 209, bolt, 210, cylinder flange, 211, bottom plate, 212, shunt cylinder;
300. the heat insulation layer mechanism comprises a heat insulation layer mechanism, 301, a heat insulation material layer, 302, a heat insulation cylinder, 303, a bracket plate, 304, a side heat insulation plate, 305 and a bottom heat insulation plate;
400. the pressure shell mechanism comprises a pressure shell mechanism 401, a pressure cylinder body 402, a second rubber O-shaped ring 403, a metal O-shaped ring 404, a long bolt 405 and a cover plate;
500. the device comprises an exhaust pipe mechanism, 501, an exhaust pipe inner sleeve, 502, an exhaust pipe, 503 and a condensed water outlet joint;
600. the flow direction of the high-temperature flue gas;
700. the flow direction of the working medium in the cold cavity;
800. and the flow direction of the working medium in the thermal cavity.
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 be made with reference to the accompanying drawings. It is obvious that the drawings in the following description are only some examples of the invention, and that for a person skilled in the art, other drawings and embodiments can be derived from them without inventive effort.
For the sake of simplicity, the drawings only schematically show the parts relevant to the present invention, and they do not represent the actual structure as a product. In addition, in order to make the drawings concise and understandable, components having the same structure or function in some of the drawings are only schematically illustrated or only labeled. In this document, "one" means not only "only one" but also a case of "more than one". In this context, the upper and lower references to the upper and lower depicted figures do not necessarily represent actual circumstances.
In this context, it is to be understood that, unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically 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.
In one embodiment of the present invention, as shown in fig. 1, a high temperature exhaust gas waste heat utilization device based on a stirling engine comprises: a gas guide tube mechanism 100 for conveying high-temperature exhaust gas; a heater mechanism 200 for heating a working medium of the stirling machine; a heat insulating layer means 300 provided around the outside of the heater means 200; and an exhaust pipe mechanism 500 for exhausting high-temperature exhaust gas of the heat storage space formed by the surrounding of the heater mechanism 200 and the heat insulating layer mechanism 300; the high-temperature flue gas flows to the heat storage space from the gas guide pipe mechanism 100 to heat the heater mechanism 200, and the heater mechanism 200 exchanges heat with the working medium to realize that the working medium is heated and push the piston to do work. In practical application, fossil energy (such as petroleum, coal and the like) and novel energy (such as hydrogen and the like) are combusted through the gas guide pipe mechanism 100 to generate high-temperature flue gas higher than 300 ℃ and the high-temperature flue gas is led to the heat storage space, so that the high-temperature flue gas and the heater mechanism 200 are subjected to heat exchange, and then working medium flowing through the heater mechanism 200 is heated, so that the piston is pushed, and the operation of the Stirling engine is realized. The arrangement of the heat insulation layer mechanism 300 ensures that the high-temperature flue gas is not easy to radiate heat through the structure, thereby greatly slowing down the heat radiation speed of the high-temperature flue gas, and simultaneously, due to the heat preservation and insulation effect of the heat insulation layer mechanism 300, the temperature of the heat storage space can be maintained at a higher temperature environment for a long time, and the high efficiency of heat exchange of the high-temperature flue gas and the stability of the running of the Stirling engine are ensured.
In another embodiment of the invention, as shown in fig. 1, a high-temperature tail gas waste heat utilization device based on a stirling engine, on the basis of any one of the above embodiments, a heater mechanism 200 comprises a heat exchange tube, a heater cylinder 204 provided with a heater hot cavity 206 and a heater cold cavity 205; the heater hot cavity 206 and the heater cold cavity 205 are communicated through a heat exchange pipe; the outer side wall of the heater cylinder 204 and the heat insulating layer mechanism 300 are arranged in an enclosing manner to form a heat storage space, and the heat exchange tube is arranged in the heat storage space; the gas-guide tube mechanism 100 is communicated with the heat storage space. It should be noted that, in practical application, the heat exchange tube can be integrally accommodated in the heat storage space, and at this time, a part of the side wall of the heater cold chamber 205 and a part of the side wall of the heater hot chamber 206 form a part of the side wall of the heat storage space; certainly, the hot end 203 of the heat exchange tube close to one side of the hot chamber 206 of the heater is accommodated in the heat storage space, and the cold end 202 of the heat exchange tube close to one side of the cold chamber 205 of the heater is arranged outside the heat storage space, so that the cold chamber 205 of the heater and the hot chamber 206 of the heater can be arranged far away from each other at the moment, although the structure causes the volume of the stirling engine to be larger, the invention also belongs to the protection scope of the invention.
Further preferably, the heater mechanism 200 further includes a shunt cylinder 212 accommodated in the heat storage space; the shunt cylinder 212 is communicated with the gas-guide tube mechanism 100, and a plurality of gas-guide holes communicated with the heat storage space are formed in the side wall of the shunt cylinder 212; the heat exchange tube is surrounded on the outer side of the flow distribution cylinder 212. Preferably, the axial direction of the flow distribution cylinder 212 and the axial direction of the airway tube mechanism 100 are parallel to each other, or are coaxially arranged; of course, the axial direction of the splitter cylinder 212 and the axial direction of the airway device 100 may be at an angle. The heat exchange tubes are arranged on the outer peripheral side of the flow dividing cylinder body 212 at intervals, and are preferably of a bent structure (such as U-shaped, wavy and the like) so as to improve the circulation path of the working medium in the heat exchange tubes, and therefore the working medium and the high-temperature flue gas can be subjected to sufficient heat exchange and temperature rise.
Further preferably, each heat exchange tube comprises a cold end 202 communicated with the heater cold chamber 205 and a plurality of hot ends 203 communicated with the heater hot chamber 206; a plurality of warm ends 203 are in communication with the cold ends 202, respectively. Preferably, the through holes of the heater cylinder 204 communicated with the hot end 203 are preferably circumferentially arranged at the end part of the heater hot cavity 206, so that the distribution balance of the working medium in the heater hot cavity 206 is improved, the stress balance and stability of the piston are ensured, and the linearity of the piston in the reciprocating motion process is ensured. Further preferably, the flow-dividing cylinder 212 comprises a ventilation end provided with a ventilation hole and a ventilation end communicated with the airway tube mechanism 100; the outer side wall of the shunt cylinder body 212 is circumferentially provided with a flame blocking ring 201, and the flame blocking ring 201 is arranged between the ventilation end and the air guide end. The flow dividing cylinder 212 is arranged in the middle of the heat storage space, and the flame blocking ring 201 enables high-temperature flue gas coming out of the air guide hole to flow only in the horizontal direction and not upwards. Further preferably, the outer side wall of the heat exchange tube is provided with fins. Further preferably, the heater cold chamber 205 is enclosed outside the heater hot chamber 206.
In another embodiment of the present invention, as shown in fig. 1, a high temperature exhaust gas waste heat utilization device based on stirling engine, on the basis of any of the above embodiments, the heat insulation layer mechanism 300 is integrally formed, and is provided with an installation channel for inserting the gas guide tube mechanism 100. In practical applications, when the heat insulating layer structure 300 is made of a molding-type heat insulating material (e.g., a heat insulating plate material), the entire heat insulating layer structure 300 may be integrally molded. Of course, when the thermal insulation material layer 301 is in a granular or fluid structure, the thermal insulation layer mechanism 300 includes a thermal insulation cylinder 302 provided with a filling cavity, and the thermal insulation material layer 301 is filled in the filling cavity. The heat insulation material layer 301 is preferably a heat insulation material layer with a fire resistance higher than that of high-temperature flue gas, and the heat insulation material layer 301 can be a shaped heat insulation material layer (ceramic fiber cotton or heat insulation plate) or an unshaped heat insulation material layer (heat insulation liquid or gas), and it should be noted that the temperature resistance of the components contained in the heat storage cavity should be higher than that of the high-temperature flue gas.
Further preferably, the insulation layer structure 300 may be a unitary body, such as an integral molding, or may be formed of more than two sub-insulation layer assemblies. Illustratively, as shown in fig. 1, the thermal insulation layer mechanism 300 includes a first thermal insulation layer assembly disposed around the outer peripheral side of the heater mechanism 200 and a second thermal insulation layer assembly disposed adjacent to the gas-guide tube mechanism 100; the first thermal insulation layer assembly and the second thermal insulation layer assembly are connected to form a side wall of the heat storage space; the second insulating layer assembly includes a bottom insulating panel 305, a side insulating panel 304, and a mounting panel 303 for mounting the airway device 100; the support plate 303 and the bottom heat-insulating plate 305 are oppositely arranged, and the side heat-insulating plate 304 is arranged between the support plate 303 and the bottom heat-insulating plate 305, so that the support plate 303, the bottom heat-insulating plate 305 and the side heat-insulating plate 304 are enclosed to form a sub heat-insulating cavity, and the sub heat-insulating cavity is filled with a heat-insulating material layer 301; the gas-guide tube mechanism 100 penetrates through the first thermal insulation layer assembly and is communicated with the heat storage space. The second insulating layer assembly comprises a second insulating cylinder forming a second sub-insulating cavity filled with a layer 301 of insulating material. The second heat insulation cylinder is provided with a notch corresponding to the first heat insulation layer assembly, so that the first heat insulation layer assembly is clamped at the notch. In practical application, the second heat insulation cylinder can be welded with the bracket plate 303 (or the bottom heat insulation plate 305, or the side heat insulation plate 304) or connected through a sealing strip, so that the sealing performance of the heat storage space is ensured.
In another embodiment of the present invention, as shown in fig. 1, a high temperature exhaust gas waste heat utilization device based on stirling engine further includes a pressure shell mechanism 400 surrounding the outer side of the heat insulation layer mechanism 300; the heat insulating layer means 300 and the pressure shell means 400 are enclosed to form an insulating chamber. Further preferably, the pressure shell mechanism 400 comprises a cover plate 405 for mounting the gas guide tube mechanism 100, a pressure cylinder 401 sleeved on the outer periphery side of the heat insulating layer mechanism 300, and a cylinder flange 210 for mounting the heater cylinder 204 of the heater mechanism 200; the cover plate 405 covers one end of the pressure cylinder 401, the heater cylinder 204 and the cylinder flange 210 together seal off the other end of the pressure cylinder 401, and the heater cylinder 204 is mounted on the stirling engine through the cylinder flange 210; the cover plate 405 is connected with the pressure cylinder 401 in a sealing way, and the pressure cylinder 401 is connected with the cylinder flange 210 in a sealing way. Further preferably, a male-female fit is provided between the cover plate 405 and the pressure cylinder 401. It is further preferred that the contact between the cover plate 405 and the pressure cylinder 401 is hermetically connected by a metal O-ring 403. Further preferably, the contact between the cartridge flange 210 and the heater cartridge 204 is sealingly connected by a first rubber O-ring 208. Further preferably, the contact position of the cylinder flange 210 and the pressure cylinder 401 is hermetically connected through a second rubber O-ring 402. Further preferably, the contact position of the bolt 209 and the cylinder flange 210 is hermetically connected through a fourth metal gasket 207, and the fourth metal gasket 207 is disposed on the upper surface of the cylinder flange 210. Further preferably, the lower end of the splitter cylinder 212 is provided with a bottom plate 211. Preferably, the bottom plate 211 is provided with air guide holes. In practical applications, the cover plate 405 is connected to the pressure cylinder 401 by the long bolt 404. The cylinder flange 210 is mounted to the body of the stirling machine by bolts 209. It is to be noted that the bolt 209 may alternatively be a connector with equal functions, such as a screw or a stud.
Further preferably, one end of the insulation layer arrangement 300 is connected to the cover plate 405 by a boom connection assembly; the other end of the heat insulating layer mechanism 300 is connected with the cylinder flange 210 through a bolt assembly; the suspender connecting assembly comprises a suspender screw 108 and a suspender 109, wherein the suspender screw 108 is connected with the cover plate 405, the suspender 109 is connected with the heat insulating layer mechanism 300, and the suspender screw 108 is connected with the suspender 109; the bolt assembly comprises a bolt and a nut, the bolt penetrates through the barrel flange 210 from the side of the heat insulation cavity outwards and then is in threaded connection with the nut, and the heat insulation layer mechanism 300 abuts against the end part of the bolt far away from the side of the nut. So that an insulating cavity is formed between the insulating layer mechanism 300 and the pressure shell mechanism 400, and in practical application, the gas in the insulating cavity can be air, vacuum or any other gas. Further preferably, a temperature sensor 104 for monitoring the temperature of the heat storage space is also included. Further preferred is a conduit means for conducting condensed liquid from the heat storage space away. When the high-temperature flue gas carries liquid formed after condensation, the liquid (such as water) formed by condensation can be discharged out of the heat storage space through the liquid guide pipe mechanism. Preferably, the liquid guiding pipe mechanism comprises a liquid guiding channel communicated with the heat storage space, and the liquid guiding channel penetrates through the pressure shell mechanism 400 and is communicated with a condensed water outlet connector 503. In order to facilitate the discharge of the liquid, the liquid conduit means is preferably arranged at a low level in the heat storage space, so that the liquid can flow out under the influence of gravity. The catheter mechanism is preferably a selectively open and closed conduit to allow periodic draining of the liquid.
Further preferably, the airway device 100 includes an air inlet outer tube 102, an air inlet inner tube 103, a ferrule fitting 105, and an insulating tube 110; the air inlet outer pipe 102 is sleeved outside the air inlet inner pipe 103, the end part of the air inlet inner pipe 103 close to one side of the heat storage space is abutted on the bottom heat insulation plate 305, the bottom heat insulation plate 305 is provided with vent holes corresponding to the air inlet inner pipe 103, and the radial size of the vent holes is smaller than the inner diameter size of the air inlet inner pipe 103; the contact pipe section of the air inlet outer pipe 102 and the heat insulation material is sleeved with the heat insulation pipe 110, one end of the heat insulation pipe 110 is abutted to the support plate 303, and the other end of the heat insulation pipe 110 is abutted to the bottom heat insulation plate 305; the outer side of the outer air inlet pipe 102 is sleeved with the ferrule connector 105 to fix the outer air inlet pipe 102, a boss is arranged on the outer side wall of the ferrule connector 105 close to one side of the heat insulation cavity, the end portion of the ferrule connector 105 close to one side of the heat insulation cavity abuts against the upper surface of the support plate 303, the end face of the boss far away from one side of the heat storage space abuts against the cover plate 405, and a third metal gasket 111 is arranged at the contact position of the ferrule connector 105 and the cover plate 405 to be in sealing connection. The end of the intake outer pipe 102 on the side remote from the cover plate 405 is mounted by the intake flange 101.
Further preferably, the suspender screw 108 and the suspender 109 are both hollow structures, the temperature sensor 104 is mounted on the suspender screw 108 through the clamping joint 105 and exposed on the outer side wall of the cover plate 405, a probe of the temperature sensor 104 sequentially penetrates through the suspender screw 108 and the suspender 109 and contacts with the heat storage space, preferably, a temperature measuring sleeve 112 penetrates through the first heat insulation assembly to realize contact between the probe and the heat storage space, and high-temperature flue gas in the heat storage space contacts with the probe through the temperature measuring sleeve 112, so that temperature monitoring of the heat storage space is realized. It should be noted that, when the length of the probe is long enough, the probe can penetrate through the first thermal insulation component and extend into the heat storage space. In order to ensure the tightness of the hanger screw 108 and thus the sealing performance of the heat insulation chamber, the hanger screw 108 and the hanger 109 are connected to the cover plate 405 by the first metal gasket 106 and the second metal gasket 107.
Further preferably, the exhaust pipe mechanism 500 includes an exhaust pipe inner sleeve 501 communicated with the heat storage space, the exhaust pipe inner sleeve 501 penetrates through the heat insulating layer mechanism 300, the heat insulating cavity and the pressure cylinder 401 and then is communicated with an external environment, an exhaust pipe 502 is arranged between the exhaust pipe inner sleeve 501 and the pressure cylinder 401, the exhaust pipe 502 is sleeved outside the exhaust pipe inner sleeve 501, and the outer diameter of the exhaust pipe inner sleeve 501 is smaller than the inner diameter of the exhaust pipe 502.
In practical application, high-temperature flue gas flows into the flow dividing cylinder 212 along the high-temperature tail gas flowing direction 600 formed by the gas guide pipe mechanism 100, and then passes through the heat exchange pipe through the gas guide hole to fill the heat storage space; the working medium flowing out of the cold cavity flows to the hot cavity 206 of the heater after passing through the cold cavity 205 of the heater and the heat exchange tube along the flow direction 700 of the working medium of the cold cavity, the working medium exchanges heat with high-temperature flue gas to heat up in the process of flowing through the heat exchange tube, then flows to the hot cavity 206 of the heater and pushes the piston to do work along the flow direction 800 of the working medium of the hot cavity; after the piston works, the working medium in the hot chamber 206 of the heater is pushed reversely by the piston, flows to the tube changing, then enters the cold chamber 205 of the heater, finally passes through the heat regenerator and the cold chamber device in sequence, and finally flows to the cold chamber.
In another embodiment of the present invention, as shown in fig. 1, a stirling machine comprises: the waste heat utilization device comprises a machine body, a heat regenerator, a cooler and the high-temperature tail gas waste heat utilization device based on the Stirling engine in any one embodiment.
It should be noted that the above embodiments can be freely combined as necessary. The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (10)
1. The utility model provides a high temperature tail gas waste heat utilization equipment based on stirling, its characterized in that includes:
the gas guide pipe mechanism is used for conveying high-temperature tail gas;
a heater mechanism for heating a working medium of the stirling machine;
the heat insulation layer mechanism is arranged around the outer side of the heater mechanism; and the number of the first and second groups,
the exhaust pipe mechanism is used for exhausting high-temperature tail gas of a heat storage space formed by the heater mechanism and the heat insulation layer mechanism in an enclosing manner;
high-temperature flue gas flows to the heat storage space by the gas guide pipe mechanism to heat the heater mechanism, and the heater mechanism exchanges heat with the working medium to realize that the working medium is heated and push the piston to do work.
2. The high-temperature tail gas waste heat utilization device based on the Stirling engine as claimed in claim 1, wherein:
the heater mechanism comprises a heat exchange tube and a heater cylinder body provided with a heater hot cavity and a heater cold cavity;
the heater hot cavity and the heater cold cavity are communicated through the heat exchange tube;
the outer side wall of the heater cylinder and the heat insulating layer mechanism are arranged in an enclosing mode to form the heat storage space, and the heat exchange tube is arranged in the heat storage space;
the gas guide pipe mechanism is communicated with the heat storage space.
3. The high-temperature tail gas waste heat utilization device based on the Stirling engine as claimed in claim 2, wherein:
the heater mechanism also comprises a shunt cylinder accommodated in the heat storage space;
the flow distribution cylinder is communicated with the gas guide pipe mechanism, and a plurality of gas guide holes communicated with the heat storage space are formed in the side wall of the flow distribution cylinder;
the heat exchange tube is arranged around the outer side of the flow distribution cylinder body.
4. The high-temperature tail gas waste heat utilization device based on the Stirling engine is characterized in that:
each heat exchange tube comprises a cold end communicated with the heater cold cavity and a plurality of hot ends communicated with the heater hot cavity; the hot ends are respectively communicated with the cold ends; and/or the presence of a gas in the gas,
the flow dividing cylinder body comprises a ventilation end provided with the air guide hole and an air guide end communicated with the air guide pipe mechanism; a flame blocking ring is arranged on the periphery of the outer side wall of the flow distribution cylinder body and is arranged between the ventilation end and the air guide end; and/or the presence of a gas in the gas,
the outer side wall of the heat exchange tube is provided with fins; and/or the presence of a gas in the gas,
the heater cold chamber is arranged around the outer side of the heater hot chamber.
5. The high-temperature tail gas waste heat utilization device based on the Stirling engine as claimed in claim 1, wherein:
the heat insulation layer mechanism is integrally formed and is provided with an installation channel for inserting the air guide pipe mechanism; and/or the presence of a gas in the gas,
the heat insulation layer mechanism comprises a heat insulation cylinder body provided with a filling cavity and a heat insulation material layer, and the heat insulation material layer is filled in the filling cavity; and/or the presence of a gas in the gas,
the heat insulation layer mechanism comprises a first heat insulation layer assembly arranged around the outer periphery of the heater mechanism and a second heat insulation layer assembly arranged close to the gas guide pipe mechanism; the first thermal insulation layer assembly and the second thermal insulation layer assembly are connected to form a side wall of the heat storage space; the second heat insulation layer assembly comprises a bottom heat insulation plate, a side heat insulation plate and a bracket plate for mounting the gas guide pipe mechanism; the support plate and the bottom heat insulation plate are oppositely arranged, the side heat insulation plate is arranged between the support plate and the bottom heat insulation plate, so that the support plate, the bottom heat insulation plate and the side heat insulation plate are surrounded to form a sub heat insulation cavity, and the sub heat insulation cavity is filled with a heat insulation material layer; the gas guide pipe mechanism penetrates through the first heat insulation layer assembly and is communicated with the heat storage space.
6. A stirling machine-based high temperature exhaust gas waste heat utilization device according to claim 1, further comprising:
the pressure shell mechanism is arranged around the outer side of the heat insulation layer mechanism;
the heat insulation layer mechanism and the pressure shell mechanism are arranged in an enclosing mode to form a heat insulation cavity.
7. A high-temperature tail gas waste heat utilization device based on a Stirling engine according to claim 6, wherein:
the pressure shell mechanism comprises a cover plate for mounting the gas guide pipe mechanism, a pressure cylinder body sleeved on the outer peripheral side of the heat insulation layer mechanism and a cylinder body flange for mounting a heater cylinder body of the heater mechanism;
the cover plate is covered at one end of the pressure cylinder, the heater cylinder and the cylinder flange jointly block the other end of the pressure cylinder, and the heater cylinder is arranged on the Stirling engine through the cylinder flange;
the cover plate is connected with the pressure cylinder body in a sealing mode, and the pressure cylinder body is connected with the cylinder body flange in a sealing mode.
8. The high-temperature tail gas waste heat utilization device based on the Stirling engine according to claim 7, wherein:
one end of the heat insulation layer mechanism is connected with the cover plate through a suspender connecting assembly;
the other end of the heat insulation layer mechanism is connected with the barrel flange through a bolt assembly;
the suspender connecting assembly comprises a suspender screw and a suspender, the suspender screw is connected with the cover plate, the suspender is connected with the heat insulating layer mechanism, and the suspender screw is connected with the suspender;
the bolt assembly comprises a bolt and a nut, the bolt penetrates through the barrel flange from one side of the heat insulation cavity to the outside and then is in threaded connection with the nut, and the heat insulation layer mechanism abuts against the end portion of the bolt on the side far away from the nut.
9. A stirling machine-based high temperature exhaust gas waste heat utilization apparatus according to any one of claims 1 to 8, further comprising:
a temperature sensor for monitoring the temperature of the heat storage space; and/or the presence of a gas in the gas,
a liquid guiding pipe mechanism used for guiding out the condensed liquid in the heat storage space.
10. A stirling machine, comprising:
the machine body, the heat regenerator, the cooler and the high-temperature tail gas waste heat utilization device based on the Stirling engine as claimed in any one of the claims 1 to 9.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911096008.1A CN110886665A (en) | 2019-11-11 | 2019-11-11 | High-temperature tail gas waste heat utilization device based on Stirling engine and Stirling engine |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911096008.1A CN110886665A (en) | 2019-11-11 | 2019-11-11 | High-temperature tail gas waste heat utilization device based on Stirling engine and Stirling engine |
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| CN112524974A (en) * | 2020-11-06 | 2021-03-19 | 兰州空间技术物理研究所 | Be applied to heat exchanger subassembly of stirling heat engine |
| IT202100026399A1 (en) * | 2021-10-14 | 2023-04-14 | Axet S R L | OXYDROGEN COMBUSTION CHAMBER FOR THE GENERATION OF THERMAL ENERGY |
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