CN214366397U - Micro gas turbine and waste heat recovery combined system - Google Patents
Micro gas turbine and waste heat recovery combined system Download PDFInfo
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- CN214366397U CN214366397U CN202022647578.XU CN202022647578U CN214366397U CN 214366397 U CN214366397 U CN 214366397U CN 202022647578 U CN202022647578 U CN 202022647578U CN 214366397 U CN214366397 U CN 214366397U
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Abstract
The utility model discloses a micro gas turbine and waste heat recovery combined system, which comprises a micro gas turbine, a steam heat exchanger, a lithium bromide refrigerating unit, a distilled water preparation device and a waste heat exchanger; the exhaust end of the turbine is communicated with the steam heat exchanger; and the steam heat exchanger, the lithium bromide refrigerating unit, the distilled water preparation device and the waste heat exchanger are communicated in sequence. The utility model discloses a miniature gas turbine and waste heat recovery combined system uses gas turbine as the heat generator, and the high temperature tail gas of its production is used for letting in steam heat exchanger, distilled water preparation ware, waste heat exchanger etc. and carries out the heat transfer to the realization turns into the purpose of high temperature liquid with the cryogenic liquids in the steam heat exchanger, realizes the purpose of preparing the distilled water, realizes cryogenic purpose, plays the effect of high-efficient recovery waste gas waste heat, can effectively improve gas turbine's efficiency, and it is extravagant to reduce the energy.
Description
Technical Field
The utility model relates to a joint energy supply system especially relates to a miniature gas turbine and waste heat recovery combined system.
Background
The distributed energy system integrates the advantages of energy conservation, environmental protection, high safety and the like, and is an effective way for relieving the energy crisis, reducing the environmental pollution and the emission of greenhouse gases, improving the energy safety and realizing the strategy of sustainable development. As an important development direction of the distributed energy system, a micro gas turbine is one of the best ways to provide clean, reliable, high-quality, multipurpose, small distributed energy, and is currently rapidly developed in developed countries and regions such as the united states, japan, and the european union, and in China. The distributed energy system based on the micro gas turbine is expected to be widely applied to occasions such as residential buildings and office buildings due to the advantages of small size, light weight, strong fuel adaptability, low fuel consumption rate, low noise vibration, low pollution emission, low maintenance cost and the like. However, the existing distributed energy system of the micro gas turbine still has the defects that the waste heat of the discharged high-temperature waste gas is not efficiently utilized, the heat circulation efficiency is not high, and energy waste is caused.
Disclosure of Invention
To the above-mentioned prior art, the utility model provides a miniature gas turbine and waste heat recovery combined system retrieves the waste heat that gas turbine produced through steam heat exchanger, distilled water preparation ware, lithium bromide refrigerating unit, waste heat exchanger etc. retrieves with high efficiency and preheats to improve gas turbine's efficiency as far as possible, it is extravagant to reduce the energy.
The utility model discloses a realize through following technical scheme:
a micro gas turbine and waste heat recovery combined system comprises a micro gas turbine, a steam heat exchanger, a lithium bromide refrigerating unit, a distilled water preparation device and a waste heat exchanger;
the micro gas turbine comprises an air compressor, a combustion chamber and a turbine which are sequentially communicated, and the air compressor and the turbine are coaxial; when the gas turbine works, a working medium is compressed by an air compressor and then enters a combustion chamber, and the working medium is mixed with gas in the combustion chamber and then is combusted, so that the turbine is pushed to do work;
the exhaust end of the turbine is communicated with the steam heat exchanger; the steam heat exchanger, the lithium bromide refrigerating unit, the distilled water preparation device and the waste heat exchanger are sequentially communicated (the temperature required during the operation of the steam heat exchanger, the lithium bromide refrigerating unit, the distilled water preparation device and the waste heat exchanger is sequentially reduced, so that the waste heat recovery process is sequentially connected according to the temperature requirement, the waste heat can be recovered to the maximum degree, and the relatively high recovery efficiency is obtained).
Furthermore, the steam heat exchanger comprises a heat exchanger body, a cold fluid tube array is arranged in the heat exchanger body, the left end and the right end of the heat exchanger body are respectively provided with a tube plate, and two ends of the cold fluid tube array are respectively fixed on the tube plates at the two ends and are transparent; the left end and the right end of the heat exchanger body are respectively provided with an end socket, and the inner cavity of each end socket is communicated with the cold fluid tube; two sealing heads are respectively provided with an opening, wherein one opening is used as a cold fluid inlet, and the other opening is used as a cold fluid outlet; a hot fluid inlet is arranged on the side wall of the bottom of the heat exchanger body, and a hot fluid outlet is arranged on the side wall of the top of the heat exchanger body; when the device works, cold fluid enters from the cold fluid inlet and flows out from the cold fluid outlet after flowing through the cold fluid column pipe; hot fluid enters from a hot fluid inlet and is discharged from a hot fluid outlet;
furthermore, a plurality of flow baffle plates are arranged in the heat exchanger body, the flow baffle plates are positioned between the hot fluid inlet and the hot fluid outlet, one end of each flow baffle plate is fixed on the top side wall or the bottom side wall of the heat exchanger body, the other end of each flow baffle plate is spaced from the bottom side wall or the top side wall of the heat exchanger body by a certain distance, and the flow baffle plates are arranged in a staggered mode (namely, if one flow baffle plate is fixed on the top side wall of the heat exchanger body, the adjacent flow baffle plate is fixed on the bottom side wall of the heat exchanger body, and if one flow baffle plate is fixed on the bottom side wall of the heat exchanger body, the adjacent flow baffle plate is fixed on the top side wall of the heat exchanger body), so that a snake-shaped channel is formed among the top side wall, the bottom side wall and the flow baffle plates of the heat exchanger body; the flow baffle is provided with holes for the cold fluid tubes to pass through. During operation, the hot-fluid gets into the back from the hot-fluid entry, flows along serpentine channel, flows from the hot-fluid export, so can effectively prolong the hot-fluid in this internal time of heat exchanger, and then the time of extension cold fluid and hot-fluid heat exchange, improves heat exchange efficiency.
Furthermore, the distance between the hot fluid inlet and the cold fluid inlet is greater than the distance between the hot fluid outlet and the cold fluid inlet (i.e. the hot fluid outlet is closer to the cold fluid inlet than the hot fluid inlet), so that the heat exchange between the cold fluid and the hot fluid can be facilitated, and the heat exchange efficiency can be improved.
Further, the distilled water preparation device comprises an evaporation tank, a condensation tank and a water collecting tank which are sequentially communicated, wherein the evaporation tank is communicated with the exhaust end of the turbine;
furthermore, a spiral downward condensation pipeline is arranged in the condensation tank, so that the condensation time can be prolonged, and the condensed water can fall conveniently.
Further, the lithium bromide refrigerating unit is a commercially available unit; the waste heat exchanger is a commercially available heat exchanger and can be any one of a shell-and-tube heat exchanger, a plate heat exchanger, a spiral plate heat exchanger and a plate-fin heat exchanger.
Furthermore, the micro gas turbine also comprises a starting integrated motor, and the starting integrated motor is coaxial with the air compressor and the turbine; the during operation, it drives the air compressor machine as the motor earlier to inspire integral type motor and starts, treats to reach the ability independent operation back with higher speed, then as generator electricity generation: after the gas is combusted in the combustion chamber, the gas pushes the turbine to do work, and then the integrated motor is driven to generate electricity.
Furthermore, in order to improve the combustion efficiency of the combustion chamber, the micro gas turbine further comprises a heat regenerator, a first channel and a second channel which are isolated from each other and are tightly attached to each other are arranged in the heat regenerator, the first channel is provided with a first inlet and a first outlet, and the second channel is provided with a second inlet and a second outlet; the first inlet is communicated with the exhaust end of the air compressor, and the first outlet is communicated with the air inlet end of the combustion chamber; the exhaust end of the combustion chamber is communicated with the air inlet end of the turbine; the second inlet is communicated with the exhaust end of the turbine, and the second outlet is communicated with the steam heat exchanger. The first channel is used for conveying high-temperature and high-pressure working media discharged from the air compressor into the combustion chamber, and the second channel is used for discharging high-temperature tail gas discharged from the turbine. Because first passageway and second passageway are kept apart each other and are hugged closely, the high temperature high pressure working medium that flows in the first passageway carries out the heat exchange with the high temperature tail gas that flows in the second passageway, so, can enough further improve the temperature of the high temperature high pressure working medium that flows in the first passageway for improve the temperature of getting into the working medium in the combustion chamber, improve combustion efficiency, can reduce the temperature of the high temperature tail gas that flows in the second passageway again, reduce the temperature of the tail gas that discharges out. Although the efficiency of a steam heat exchanger and the like is reduced by adding the heat regenerator, the efficiency of the gas turbine is improved, the overall efficiency of the system is not reduced, and the heat regenerator can be selectively arranged or not arranged according to working conditions during specific use.
Furthermore, in order to fully utilize natural energy, the utility model can also introduce solar energy, which comprises a solar reflector and a solar energy collecting device, wherein the solar energy collecting device is arranged on the micro gas turbine; the micro gas turbine is positioned above or below the solar reflector and the solar energy collection device is positioned at the focus point of the solar reflector (such as a dish reflector).
Furthermore, the solar energy collecting device is a heat absorbing plate, and the heat absorbing plate is coated on the heat regenerator shell or used as a part or the whole shell of the heat regenerator. The illumination increases the heat accumulated on the daytime heat regenerator, so that the system can generate more electric energy and heat, and the efficiency is improved.
The utility model discloses a miniature gas turbine and waste heat recovery combined system, the work flow is: the integrated motor is started to drive the air compressor (or the starter is adopted to drive the air compressor to start, and the starter is disconnected after the air compressor is accelerated to be capable of operating independently), and the air compressor continuously sucks working media (such as air) and compresses the working media; the compressed working medium is introduced into a combustion chamber through an air passage or a pipeline, and is mixed with fuel gas atomized by a nozzle in the combustion chamber and then is combusted to generate high-temperature and high-pressure gas; the high-temperature and high-pressure gas enters the turbine to do work through expansion, the turbine is pushed to rotate, the air compressor and the starting integrated motor are driven to rotate at a high speed, the chemical energy of the gas or liquid fuel is partially converted into mechanical work, and electric work is output; after the gas does work through the turbine, the gas enters the steam heat exchanger through the hot fluid inlet as a hot fluid, meanwhile, the cold fluid (such as normal-temperature water) is introduced through the cold fluid inlet, the hot fluid flows in the heat exchanger body (when the serpentine channel is arranged, the hot fluid flows in the serpentine channel), the cold fluid flows in the cold fluid column tube, the hot fluid and the cold fluid perform heat exchange, the fluid with higher temperature flows out of the cold fluid outlet, and the fluid with lower temperature flows out of the hot fluid outlet, so that the heat exchange process is completed. And the fluid flowing out of the hot fluid outlet enters a lithium bromide refrigerating unit, then enters a distilled water preparation device to prepare distilled water, and then enters a waste heat exchanger to carry out the last heat exchange. When the heat regenerator is arranged, working media compressed by the air compressor enter a first channel of the heat regenerator through a first inlet, then enter a combustion chamber through a first outlet, are mixed with gas to be combusted to generate high-temperature and high-pressure gas, enter a turbine, push the turbine to do work, and then high-temperature tail gas enters a second channel of the heat regenerator through a second inlet, exchanges heat with the compressed working media, flows out through a second outlet and flows into a steam heat exchanger as hot fluid.
The utility model discloses a miniature gas turbine and waste heat recovery combined system uses gas turbine as the heat generator, and the high temperature tail gas of its production is used for letting in steam heat exchanger, distilled water preparation ware, waste heat exchanger etc. and carries out the heat transfer to the realization turns into the purpose of high temperature liquid with the cryogenic liquids in the steam heat exchanger, realizes preparing the purpose of distilled water, plays the effect of retrieving the waste gas waste heat, can effectively improve gas turbine's efficiency, and it is extravagant to reduce the energy. The utility model discloses can also set up the regenerator, utilize solar energy to make micro gas turbine's efficiency higher.
The various terms and phrases used herein have the ordinary meaning as is well known to those skilled in the art. To the extent that the terms and phrases are not inconsistent with a known meaning, the meaning of the present application is expressed.
Drawings
FIG. 1: schematic diagram of a micro gas turbine and waste heat recovery combined system of example 1.
FIG. 2: the structure of the steam heat exchanger is schematic.
FIG. 3: the cross-sectional structure of the heat exchanger body is schematic.
FIG. 4: the combined micro gas turbine and waste heat recovery system of example 2 is a schematic diagram.
FIG. 5: schematic diagram of a micro gas turbine and waste heat recovery combined system of example 3.
101, a heat regenerator; 1011. a first inlet; 1012. a first outlet; 1013. a second inlet; 1014. a second outlet; 102. an air compressor; 103. starting an integrated motor; 104. a turbine; 105. a combustion chamber; 2. a solar reflector; 21. a solar energy collection device; 3. a steam heat exchanger; 31. a heat exchanger body; 32. a cold fluid column; 33. a flow baffle plate; 34. a cold fluid outlet; 35. a cold fluid outlet; 36. a hot fluid inlet; 37. a hot fluid outlet; 38. a tube sheet; 39. sealing the end; 4. a distilled water preparing device; 6. a lithium bromide refrigeration unit; 7. a waste heat exchanger.
Detailed Description
The present invention will be further explained with reference to the drawings, examples, and the like.
Example 1 micro gas turbine and waste heat recovery Combined System
A micro gas turbine and waste heat recovery combined system comprises a micro gas turbine, a steam heat exchanger 3, a lithium bromide refrigerating unit 6, a distilled water preparation device 4 and a waste heat exchanger 7.
The micro gas turbine comprises an air compressor 102, a starting integrated motor 103, a turbine 104 and a combustion chamber 105, as shown in fig. 1, the air compressor 102, the starting integrated motor 103 and the turbine 104 are coaxial, and the air compressor 102, the combustion chamber 105 and the turbine 104 are communicated in sequence.
The exhaust end of the turbine 104 is communicated with the hot fluid inlet 36 of the steam heat exchanger 3; the steam heat exchanger 3, the lithium bromide refrigerating unit 6, the distilled water preparation device 4 and the waste heat exchanger 7 are communicated in sequence.
The steam heat exchanger 3 comprises a heat exchanger body 31, as shown in fig. 2, a cold fluid tube array 32 is arranged in the heat exchanger body 31, tube plates 38 are respectively arranged at the left end and the right end of the heat exchanger body 31, and two ends of the cold fluid tube array 32 are respectively fixed on the tube plates 38 at the two ends and are transparent; the left end and the right end of the heat exchanger body 31 are respectively provided with a seal head 39, and the inner cavity of each seal head 39 is communicated with the cold fluid column 32; two sealing heads are respectively provided with an opening, wherein one opening is used as a cold fluid inlet 34, and the other opening is used as a cold fluid outlet 35; a hot fluid inlet 36 is arranged on the bottom side wall of the heat exchanger body 31, and a hot fluid outlet 37 is arranged on the top side wall of the heat exchanger body 31. During operation, cold fluid enters from the cold fluid inlet 34, flows through the cold fluid column 32 and then flows out from the cold fluid outlet 35; hot fluid enters through the hot fluid inlet 36 and exits through the hot fluid outlet 37.
A plurality of baffle plates 33 are arranged in the heat exchanger body 31, the baffle plates 33 are positioned between a hot fluid inlet 36 and a hot fluid outlet 37, one end of each baffle plate 33 is fixed on the top side wall or the bottom side wall of the heat exchanger body 31, the other end of each baffle plate 33 is spaced from the bottom side wall or the top side wall of the heat exchanger body 31 by a certain distance, and the baffle plates 33 are arranged in a staggered manner (namely, if a certain baffle plate 33 is fixed on the top side wall of the heat exchanger body 31, the baffle plate 33 adjacent to the certain baffle plate 33 is fixed on the bottom side wall of the heat exchanger body 31, if a certain baffle plate 33 is fixed on the bottom side wall of the heat exchanger body 31, the baffle plate 33 adjacent to the certain baffle plate 33 is fixed on the top side wall of the heat exchanger body 31), so that a serpentine channel is formed among the top side wall of the heat exchanger body 31, the bottom side wall of the heat exchanger body 31 and the baffle plates 33; the baffle 33 has holes for the cold fluid tubes 32 to pass through (as shown in fig. 3). During operation, the hot-fluid flows along the serpentine channel after entering from the hot-fluid inlet 36 and flows out from the hot-fluid outlet 37, so that the time of the hot-fluid in the heat exchanger body 31 can be effectively prolonged, the time of heat exchange between cold fluid and the hot-fluid is further prolonged, and the heat exchange efficiency is improved.
The distance between the hot fluid inlet 36 and the cold fluid inlet 34 is greater than the distance between the hot fluid outlet 37 and the cold fluid inlet 34 (i.e. the hot fluid outlet 37 is closer to the cold fluid inlet 34 than the hot fluid inlet 36), so that the heat exchange between the cold fluid and the hot fluid can be facilitated, and the heat exchange efficiency can be improved.
The waste heat exchanger is selected from any one of a shell-and-tube heat exchanger, a plate heat exchanger, a spiral plate heat exchanger and a plate-fin heat exchanger.
The working process is as follows: starting the integrated motor 103 to drive the air compressor 102 to start, and continuously sucking working media (such as air) into the air compressor 102 and compressing the working media; the compressed working medium is introduced into the combustion chamber 105 through an air passage or a pipeline, and is mixed with the fuel gas atomized by the nozzle in the combustion chamber 105 and then is combusted to generate high-temperature and high-pressure gas; the high-temperature and high-pressure gas enters the turbine 104 to expand and do work, the turbine 104 is pushed to rotate and the air compressor 102 and the starting integrated motor 103 are driven to rotate at high speed, the chemical energy part of the gas or liquid fuel is converted into mechanical work, and electric work is output; after the work of the turbine 104, the gas enters the steam heat exchanger 3 as a hot fluid through the hot fluid inlet 36, and meanwhile, a cold fluid (for example, normal temperature water) is introduced through the cold fluid inlet 34, the hot fluid flows in the serpentine channel, the cold fluid flows in the cold fluid column 32, the hot fluid exchanges heat with the cold fluid, the fluid with higher temperature flows out of the cold fluid outlet 35, and the fluid with lower temperature flows out of the hot fluid outlet 37, thereby completing the heat exchange process. And the fluid flowing out of the hot fluid outlet 35 enters a lithium bromide refrigerating unit 6, then enters a distilled water preparation device 4 for preparing distilled water, and then enters a waste heat exchanger 7 for carrying out the last heat exchange.
Example 2 micro gas turbine and waste heat recovery Combined System
A micro gas turbine and waste heat recovery combined system comprises a micro gas turbine, a steam heat exchanger 3, a lithium bromide refrigerating unit 6, a distilled water preparation device 4 and a waste heat exchanger 7.
The micro gas turbine includes a heat regenerator 101, an air compressor 102, a starting integrated motor 103, a turbine 104, and a combustion chamber 105, and as shown in fig. 4, the air compressor 102, the starting integrated motor 103, and the turbine 104 are coaxial.
The regenerator 101 has a first channel and a second channel isolated and closely attached to each other, the first channel has a first inlet 1011 and a first outlet 1012, and the second channel has a second inlet 1013 and a second outlet 1014; the first inlet 1011 is communicated with the exhaust end of the air compressor 102, and the first outlet 1012 is communicated with the air inlet end of the combustion chamber 105; the exhaust end of the combustion chamber 105 communicates with the intake end of the turbine 104; the second inlet 1013 is in communication with the exhaust end of the turbine 104 and the second outlet 1014 is in communication with the hot fluid inlet 36 of the steam heat exchanger 3. The first channel is used for conveying high-temperature and high-pressure working media discharged from the air compressor into the combustion chamber, and the second channel is used for discharging high-temperature tail gas discharged from the turbine.
The steam heat exchanger 3, the lithium bromide refrigerating unit 6, the distilled water preparation device 4 and the waste heat exchanger 7 are communicated in sequence.
The steam heat exchanger 3 comprises a heat exchanger body 31, as shown in fig. 2, a cold fluid tube array 32 is arranged in the heat exchanger body 31, tube plates 38 are respectively arranged at the left end and the right end of the heat exchanger body 31, and two ends of the cold fluid tube array 32 are respectively fixed on the tube plates 38 at the two ends and are transparent; the left end and the right end of the heat exchanger body 31 are respectively provided with a seal head 39, and the inner cavity of each seal head 39 is communicated with the cold fluid column 32; two sealing heads are respectively provided with an opening, wherein one opening is used as a cold fluid inlet 34, and the other opening is used as a cold fluid outlet 35; a hot fluid inlet 36 is arranged on the bottom side wall of the heat exchanger body 31, and a hot fluid outlet 37 is arranged on the top side wall of the heat exchanger body 31. During operation, cold fluid enters from the cold fluid inlet 34, flows through the cold fluid column 32 and then flows out from the cold fluid outlet 35; hot fluid enters through the hot fluid inlet 36 and exits through the hot fluid outlet 37.
A plurality of baffle plates 33 are arranged in the heat exchanger body 31, the baffle plates 33 are positioned between a hot fluid inlet 36 and a hot fluid outlet 37, one end of each baffle plate 33 is fixed on the top side wall or the bottom side wall of the heat exchanger body 31, the other end of each baffle plate 33 is spaced from the bottom side wall or the top side wall of the heat exchanger body 31 by a certain distance, and the baffle plates 33 are arranged in a staggered manner (namely, if a certain baffle plate 33 is fixed on the top side wall of the heat exchanger body 31, the baffle plate 33 adjacent to the certain baffle plate 33 is fixed on the bottom side wall of the heat exchanger body 31, if a certain baffle plate 33 is fixed on the bottom side wall of the heat exchanger body 31, the baffle plate 33 adjacent to the certain baffle plate 33 is fixed on the top side wall of the heat exchanger body 31), so that a serpentine channel is formed among the top side wall of the heat exchanger body 31, the bottom side wall of the heat exchanger body 31 and the baffle plates 33; the baffle 33 has holes for the cold fluid tubes 32 to pass through (as shown in fig. 3). During operation, the hot-fluid flows along the serpentine channel after entering from the hot-fluid inlet 36 and flows out from the hot-fluid outlet 37, so that the time of the hot-fluid in the heat exchanger body 31 can be effectively prolonged, the time of heat exchange between cold fluid and the hot-fluid is further prolonged, and the heat exchange efficiency is improved.
The distance between the hot fluid inlet 36 and the cold fluid inlet 34 is greater than the distance between the hot fluid outlet 37 and the cold fluid inlet 34 (i.e. the hot fluid outlet 37 is closer to the cold fluid inlet 34 than the hot fluid inlet 36), so that the heat exchange between the cold fluid and the hot fluid can be facilitated, and the heat exchange efficiency can be improved.
The waste heat exchanger is selected from a shell-and-tube heat exchanger.
The working process is as follows: starting the integrated motor 103 to drive the air compressor 102 to start, and continuously sucking working media (such as air) into the air compressor 102 and compressing the working media; the compressed working medium enters the heat regenerator 101 through a first inlet 1011, then enters the combustion chamber 105 through a first outlet 1012, and is mixed with the fuel gas atomized by the nozzle in the combustion chamber 105 and then is combusted to generate high-temperature and high-pressure gas; the high-temperature and high-pressure gas enters the turbine 104 to expand and do work, the turbine 104 is pushed to rotate and the air compressor 102 and the starting integrated motor 103 are driven to rotate at high speed, the chemical energy part of the gas or liquid fuel is converted into mechanical work, and electric work is output; after the work of the turbine 104, the gas enters the heat regenerator 101 through the second inlet 1013, after heat exchange (heat exchange between the compressed working medium and the high-temperature tail gas) is performed in the heat regenerator 101, the gas enters the steam heat exchanger 3 (as a hot fluid) through the second outlet 1014, meanwhile, a cold fluid (such as normal-temperature water) is introduced through the cold fluid inlet 34, the hot fluid flows in the serpentine channel, the cold fluid flows in the cold fluid column 32, the hot fluid exchanges heat with the cold fluid, the fluid with higher temperature flows out of the cold fluid outlet 35, and the fluid with lower temperature flows out of the hot fluid outlet 37, thereby completing the heat exchange process. And the fluid flowing out of the hot fluid outlet 37 enters the lithium bromide refrigerating unit 6, then enters the distilled water preparation device 4 for preparing distilled water, and then enters the waste heat exchanger 7 for carrying out the last heat exchange.
EXAMPLE 3 micro gas turbine and waste heat recovery Combined System
A micro gas turbine and waste heat recovery combined system comprises a micro gas turbine, a steam heat exchanger 3, a lithium bromide refrigerating unit 6, a distilled water preparation device 4 and a waste heat exchanger 7.
The micro gas turbine includes a heat regenerator 101, an air compressor 102, a starting integrated motor 103, a turbine 104, and a combustion chamber 105, and as shown in fig. 5, the air compressor 102, the starting integrated motor 103, and the turbine 104 are coaxial.
The regenerator 101 has a first channel and a second channel isolated and closely attached to each other, the first channel has a first inlet 1011 and a first outlet 1012, and the second channel has a second inlet 1013 and a second outlet 1014; the first inlet 1011 is communicated with the exhaust end of the air compressor 102, and the first outlet 1012 is communicated with the air inlet end of the combustion chamber 105; the exhaust end of the combustion chamber 105 communicates with the intake end of the turbine 104; the second inlet 1013 is in communication with the exhaust end of the turbine 104 and the second outlet 1014 is in communication with the steam heat exchanger 3. The first channel is used for conveying high-temperature and high-pressure working media discharged from the air compressor into the combustion chamber, and the second channel is used for discharging high-temperature tail gas discharged from the turbine.
The steam heat exchanger 3, the lithium bromide refrigerating unit 6, the distilled water preparation device 4 and the waste heat exchanger 7 are communicated in sequence.
The micro gas turbine also comprises a solar reflector 2 and a solar collecting device 21, wherein the solar collecting device 21 is arranged on the micro gas turbine; the micro gas turbine is positioned above the solar reflector 2 with the solar energy collector 21 at the focal point of the solar reflector 2, e.g. a dish reflector. The solar energy collecting device 2 is a heat absorbing plate, and the heat absorbing plate is coated on the shell of the heat regenerator 101, or is used as a part of or the whole shell of the heat regenerator 101. The illumination increases the heat accumulated on the daytime heat regenerator 101, which can make the system generate more electric energy and heat, and improve the efficiency.
The steam heat exchanger 3 comprises a heat exchanger body 31, as shown in fig. 2, a cold fluid tube array 32 is arranged in the heat exchanger body 31, tube plates 38 are respectively arranged at the left end and the right end of the heat exchanger body 31, and two ends of the cold fluid tube array 32 are respectively fixed on the tube plates 38 at the two ends and are transparent; the left end and the right end of the heat exchanger body 31 are respectively provided with a seal head 39, and the inner cavity of each seal head 39 is communicated with the cold fluid column 32; two sealing heads are respectively provided with an opening, wherein one opening is used as a cold fluid inlet 34, and the other opening is used as a cold fluid outlet 35; a hot fluid inlet 36 is arranged on the bottom side wall of the heat exchanger body 31, and a hot fluid outlet 37 is arranged on the top side wall of the heat exchanger body 31. During operation, cold fluid enters from the cold fluid inlet 34, flows through the cold fluid column 32 and then flows out from the cold fluid outlet 35; hot fluid enters through the hot fluid inlet 36 and exits through the hot fluid outlet 37.
A plurality of baffle plates 33 are arranged in the heat exchanger body 31, the baffle plates 33 are positioned between a hot fluid inlet 36 and a hot fluid outlet 37, one end of each baffle plate 33 is fixed on the top side wall or the bottom side wall of the heat exchanger body 31, the other end of each baffle plate 33 is spaced from the bottom side wall or the top side wall of the heat exchanger body 31 by a certain distance, and the baffle plates 33 are arranged in a staggered manner (namely, if a certain baffle plate 33 is fixed on the top side wall of the heat exchanger body 31, the baffle plate 33 adjacent to the certain baffle plate 33 is fixed on the bottom side wall of the heat exchanger body 31, if a certain baffle plate 33 is fixed on the bottom side wall of the heat exchanger body 31, the baffle plate 33 adjacent to the certain baffle plate 33 is fixed on the top side wall of the heat exchanger body 31), so that a serpentine channel is formed among the top side wall of the heat exchanger body 31, the bottom side wall of the heat exchanger body 31 and the baffle plates 33; the baffle 33 has holes for the cold fluid tubes 32 to pass through (as shown in fig. 3). During operation, the hot-fluid flows along the serpentine channel after entering from the hot-fluid inlet 36 and flows out from the hot-fluid outlet 37, so that the time of the hot-fluid in the heat exchanger body 31 can be effectively prolonged, the time of heat exchange between cold fluid and the hot-fluid is further prolonged, and the heat exchange efficiency is improved.
The distance between the hot fluid inlet 36 and the cold fluid inlet 34 is greater than the distance between the hot fluid outlet 37 and the cold fluid inlet 34 (i.e. the hot fluid outlet 37 is closer to the cold fluid inlet 34 than the hot fluid inlet 36), so that the heat exchange between the cold fluid and the hot fluid can be facilitated, and the heat exchange efficiency can be improved.
The distilled water preparation device 4 comprises an evaporation tank, a condensation tank and a water collecting tank which are sequentially communicated, and the evaporation tank is communicated with the exhaust end of the turbine. The spiral downward condensation pipeline is arranged in the condensation tank, so that the condensation time can be prolonged, and the condensed water can fall conveniently.
The waste heat exchanger 7 is selected from a plate-fin heat exchanger.
The working process is as follows: starting the integrated motor 103 to drive the air compressor 102 to start, and continuously sucking working media (such as air) into the air compressor 102 and compressing the working media; the compressed working medium enters the heat regenerator 101 through a first inlet 1011, then enters the combustion chamber 105 through a first outlet 1012, and is mixed with the fuel gas atomized by the nozzle in the combustion chamber 105 and then is combusted to generate high-temperature and high-pressure gas; the high-temperature and high-pressure gas enters the turbine 104 to expand and do work, the turbine 104 is pushed to rotate and the air compressor 102 and the starting integrated motor 103 are driven to rotate at high speed, the chemical energy part of the gas or liquid fuel is converted into mechanical work, and electric work is output; after the work of the turbine 104, the gas enters the heat regenerator 101 through the second inlet 1013, after heat exchange (heat exchange between the compressed working medium and the high-temperature tail gas) is performed in the heat regenerator 101, the gas enters the steam heat exchanger 3 (as a hot fluid) through the second outlet 1014, meanwhile, a cold fluid (such as normal-temperature water) is introduced through the cold fluid inlet 34, the hot fluid flows in the serpentine channel, the cold fluid flows in the cold fluid column 32, the hot fluid exchanges heat with the cold fluid, the fluid with higher temperature flows out of the cold fluid outlet 35, and the fluid with lower temperature flows out of the hot fluid outlet 37, thereby completing the heat exchange process. The fluid that the hot fluid outlet flows out gets into lithium bromide refrigerating unit 6, then gets into the evaporating pot of distilled water preparation ware 4, lets in normal temperature water in the evaporating pot, and the high temperature tail gas of following gas turbine exhaust makes normal temperature water be heated and evaporates, and steam gets into the condensing can by the pipeline, flows into the header tank after condensing and collects for the distilled water. Then enters a waste heat exchanger 7 for the last heat exchange.
It will be appreciated by persons skilled in the art that the above description is intended to be illustrative of the invention only and is not intended to limit the scope of the invention. In addition, after reading the contents of the present invention, those skilled in the art can combine the equivalent features of the present invention without changing the technical idea, and the technical solution formed by combining the equivalent features of the present invention also falls into the protection scope of the present invention.
Claims (10)
1. A micro gas turbine and waste heat recovery combined system is characterized in that: the system comprises a micro gas turbine, a steam heat exchanger, a lithium bromide refrigerating unit, a distilled water preparation device and a waste heat exchanger; the micro gas turbine comprises an air compressor, a combustion chamber and a turbine which are sequentially communicated, and the air compressor and the turbine are coaxial; the exhaust end of the turbine is communicated with the steam heat exchanger; and the steam heat exchanger, the lithium bromide refrigerating unit, the distilled water preparation device and the waste heat exchanger are communicated in sequence.
2. The micro gas turbine and waste heat recovery combined system of claim 1, wherein: the steam heat exchanger comprises a heat exchanger body, a cold fluid tube array is arranged in the heat exchanger body, the left end and the right end of the heat exchanger body are respectively provided with a tube plate, and two ends of the cold fluid tube array are respectively fixed on the tube plates at the two ends and are transparent; the left end and the right end of the heat exchanger body are respectively provided with an end socket, and the inner cavity of each end socket is communicated with the cold fluid tube; two sealing heads are respectively provided with an opening, wherein one opening is used as a cold fluid inlet, and the other opening is used as a cold fluid outlet; a hot fluid inlet is formed in the side wall of the bottom of the heat exchanger body, and a hot fluid outlet is formed in the side wall of the top of the heat exchanger body.
3. The micro gas turbine and waste heat recovery combined system of claim 2, wherein: the heat exchanger comprises a heat exchanger body, a plurality of flow baffle plates and a plurality of heat exchanger heat exchange units, wherein the heat exchanger body is internally provided with the plurality of flow baffle plates, the flow baffle plates are positioned between a hot fluid inlet and a hot fluid outlet, one ends of the flow baffle plates are fixed on the top side wall or the bottom side wall of the heat exchanger body, the other ends of the flow baffle plates are spaced from the bottom side wall or the top side wall of the heat exchanger body by a certain distance, and the flow baffle plates are arranged in a staggered manner, so that a snake-shaped channel is formed among the top side wall, the bottom side wall and the flow baffle plates of the heat exchanger body; the flow baffle is provided with holes for the cold fluid tubes to pass through.
4. The micro gas turbine and waste heat recovery combined system of claim 2, wherein: the distance between the hot fluid inlet and the cold fluid inlet is larger than the distance between the hot fluid outlet and the cold fluid inlet.
5. The micro gas turbine and waste heat recovery combined system of claim 1, wherein: the distilled water preparation device comprises an evaporation tank, a condensation tank and a water collecting tank which are sequentially communicated, and the evaporation tank is communicated with the exhaust end of the turbine.
6. The micro gas turbine and waste heat recovery combined system of claim 1, wherein: the waste heat exchanger is selected from any one of a shell-and-tube heat exchanger, a plate heat exchanger, a spiral plate heat exchanger and a plate-fin heat exchanger.
7. The micro gas turbine and waste heat recovery combined system of claim 1, wherein: the micro gas turbine also comprises a starting integrated motor which is coaxial with the air compressor and the turbine.
8. The micro gas turbine and waste heat recovery combined system according to any one of claims 1 to 7, wherein: the micro gas turbine also comprises a regenerator, wherein a first channel and a second channel which are isolated from each other and are tightly attached to each other are arranged in the regenerator, the first channel is provided with a first inlet and a first outlet, and the second channel is provided with a second inlet and a second outlet; the first inlet is communicated with the exhaust end of the air compressor, and the first outlet is communicated with the air inlet end of the combustion chamber; the exhaust end of the combustion chamber is communicated with the air inlet end of the turbine; the second inlet is communicated with the exhaust end of the turbine, and the second outlet is communicated with the steam heat exchanger.
9. The micro gas turbine and waste heat recovery combined system of claim 8, wherein: the solar energy collecting device is arranged on the micro gas turbine; the micro gas turbine is positioned above or below the solar reflector, and the solar energy collecting device is positioned on the focus point of the solar reflector.
10. The micro gas turbine and waste heat recovery combined system of claim 9, wherein: the solar energy collecting device is a heat absorbing plate, and the heat absorbing plate is coated on the shell of the heat regenerator or used as part or all of the shell of the heat regenerator.
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| CN202022647578.XU CN214366397U (en) | 2020-11-16 | 2020-11-16 | Micro gas turbine and waste heat recovery combined system |
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| CN202022647578.XU CN214366397U (en) | 2020-11-16 | 2020-11-16 | Micro gas turbine and waste heat recovery combined system |
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Effective date of registration: 20230418 Address after: 518063 10 Nanshan District Road, Gaoxin south, Nanshan District, Shenzhen, Guangdong. Patentee after: Liu Muhua Address before: 100176 room 1202a, 12 / F, block B, building 1, yard 19, Ronghua Middle Road, economic and Technological Development Zone, Daxing District, Beijing Patentee before: Jin Pu |
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