CN220687416U - Flue gas waste heat recovery device and gas turbine cogeneration system - Google Patents
Flue gas waste heat recovery device and gas turbine cogeneration system Download PDFInfo
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- CN220687416U CN220687416U CN202322479233.1U CN202322479233U CN220687416U CN 220687416 U CN220687416 U CN 220687416U CN 202322479233 U CN202322479233 U CN 202322479233U CN 220687416 U CN220687416 U CN 220687416U
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- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims abstract description 116
- 239000003546 flue gas Substances 0.000 title claims abstract description 116
- 239000002918 waste heat Substances 0.000 title claims abstract description 89
- 238000011084 recovery Methods 0.000 title claims abstract description 38
- 239000007789 gas Substances 0.000 title claims abstract description 27
- 230000005611 electricity Effects 0.000 claims abstract description 7
- 239000000779 smoke Substances 0.000 claims abstract description 4
- 239000012530 fluid Substances 0.000 claims description 21
- 238000010438 heat treatment Methods 0.000 abstract description 9
- 230000009286 beneficial effect Effects 0.000 abstract description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 10
- 238000004891 communication Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 238000002485 combustion reaction Methods 0.000 description 3
- 238000001816 cooling Methods 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 238000010248 power generation Methods 0.000 description 3
- 238000010795 Steam Flooding Methods 0.000 description 2
- 238000009833 condensation Methods 0.000 description 2
- 230000005494 condensation Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000004134 energy conservation Methods 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000009466 transformation Effects 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000003044 adaptive effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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Abstract
The utility model particularly discloses a flue gas waste heat recovery device and a gas turbine cogeneration system, wherein the flue gas waste heat recovery device comprises a waste heat boiler, a steam turbine, a first heat exchange component, a second heat exchange component and a heat supply network loop, the waste heat boiler is provided with a flue gas first inlet and a flue gas first outlet, the flue gas first inlet is connected with a smoke exhaust pipeline, the steam turbine is connected with the waste heat boiler to utilize steam generated by the waste heat boiler to generate electricity, the first heat exchange component is provided with a first medium flow channel and a second medium flow channel, the first medium flow channel is connected with the flue gas first outlet, the second heat exchange component is connected with the steam turbine and the waste heat boiler to condense and then convey the steam exhausted by the steam turbine to the waste heat boiler, and the heat supply network loop is connected with the first heat exchange component and the second heat exchange component to realize a heating function. The flue gas waste heat recovery device disclosed by the utility model can improve the utilization rate of flue gas waste heat, further improve the cogeneration efficiency and is beneficial to saving energy.
Description
Technical Field
The utility model relates to the technical field of gas turbines, in particular to a flue gas waste heat recovery device and a gas turbine cogeneration system.
Background
As an important component of clean energy, the gas turbine power supply system has the advantages of high energy utilization rate, small environmental pollution and the like, and is favored by industry personnel and is rapidly developed. In recent years, in order to solve the problems of distributed layout, difficult monitoring, serious pollution and the like of small boilers in a heating network, the implementation of cogeneration transformation for central heating has become an important development target.
After the gas turbine power supply system is subjected to adaptive heating transformation in the related technology, the problems of low cogeneration efficiency and unfavorable energy conservation are found.
Disclosure of Invention
The present utility model aims to solve at least one of the technical problems in the related art to some extent. Therefore, the embodiment of the utility model provides a flue gas waste heat recovery device, which can further improve the heat and power co-production efficiency by improving the utilization rate of the flue gas waste heat and is beneficial to saving energy.
In one embodiment of the utility model, a gas turbine cogeneration system is also provided.
According to the embodiment of the utility model, the flue gas waste heat recovery device comprises:
the exhaust-heat boiler is provided with a first flue gas inlet and a first flue gas outlet, and the first flue gas inlet is connected with a smoke exhaust pipeline;
the steam turbine is connected with the waste heat boiler to generate electricity by utilizing steam generated by the waste heat boiler;
the first heat exchange assembly is provided with a first medium flow passage and a second medium flow passage, and the first medium flow passage is connected with the first flue gas outlet;
the second heat exchange assembly is provided with a third medium flow passage and a fourth medium flow passage, and the third medium flow passage is connected with the steam turbine and the waste heat boiler so as to condense the steam discharged by the steam turbine and then convey the condensed steam to the waste heat boiler;
and the heat supply network loop is communicated with the second medium flow channel and the fourth medium flow channel, so that the medium in the second medium flow channel exchanges heat with flue gas in the first medium flow channel and the medium in the fourth medium flow channel exchanges heat with steam in the third medium flow channel.
In the flue gas waste heat recovery device provided by the embodiment of the utility model, the flue gas waste heat can heat water in the waste heat boiler to generate steam, then the steam drives the steam turbine to do work to generate electricity, and the first heat exchange component and the second heat exchange component can exchange heat with the heat supply network loop to realize heating, so that the utilization rate of the flue gas waste heat can be improved, the heat and power cogeneration efficiency is further improved, and the energy conservation is facilitated.
In some embodiments, the heat supply network circuit includes a main pipeline having a first branch pipeline, a second branch pipeline, and a first control valve, the first branch pipeline and the second branch pipeline being arranged in parallel, the first control valve being arranged on the first branch pipeline, the second medium flow passage being connected on the second branch pipeline, and the fourth medium flow passage being connected on the main pipeline.
In some embodiments, a second control valve and a third control valve are disposed on the second branch pipe, one of the second control valve and the third control valve is located at an inlet end of the second medium flow passage, and the other of the second control valve and the third control valve is located at an outlet end of the second medium flow passage.
In some embodiments, the first heat exchange assembly and the second heat exchange assembly are disposed sequentially along a flow direction of fluid within the heat supply network circuit.
In some embodiments, the first heat exchange assembly is a flue gas heat exchanger.
In some embodiments, the heat supply network circuit further comprises a first pump body to drive the fluid in the heat supply network circuit to circulate.
In some embodiments, the second heat exchange component is a condenser, and a second pump body is arranged between the condenser and the waste heat boiler.
In some embodiments, the steam turbine includes a high pressure cylinder and a low pressure cylinder, which are disposed in sequence along a flow direction of steam discharged from the heat recovery boiler.
In one embodiment, the exhaust-heat boiler has a high pressure outlet connected to the high pressure cylinder to deliver high pressure steam discharged from the exhaust-heat boiler to the high pressure cylinder, and a low pressure outlet connected to the low pressure cylinder to deliver low pressure steam discharged from the exhaust-heat boiler to the low pressure cylinder.
In an embodiment of the utility model, a gas turbine cogeneration system is further provided, which comprises a gas turbine and the flue gas waste heat recovery device, wherein the gas turbine is provided with a flue gas pipeline, and the flue gas waste heat recovery device is connected with the flue gas pipeline.
Drawings
Fig. 1 is a schematic structural diagram of a flue gas waste heat recovery device according to an embodiment of the present utility model.
FIG. 2 is a schematic diagram of a gas turbine cogeneration system in accordance with an embodiment of the utility model.
Reference numerals:
a waste heat boiler 11, a flue gas first inlet 111, a flue gas first outlet 112, a high pressure outlet 113, and a low pressure outlet 114;
a steam turbine 12, a high pressure cylinder 121, a low pressure cylinder 122, and a first generator 123;
a second heat exchange assembly 13;
a second pump body 14;
a first heat exchange assembly 21;
the heat supply network circuit 31, the main pipe 311, the first branch pipe 3111, the second branch pipe 3112, the first control valve 3113, the second control valve 3114, the third control valve 3115, and the first pump body 312;
a heat network user 40;
a smoke exhaust duct 50;
a gas turbine 60; a compressor 61, a combustion chamber 62, a gas turbine 63, a second generator 64.
Detailed Description
Reference will now be made in detail to embodiments of the present utility model, examples of which are illustrated in the accompanying drawings. The embodiments described below by referring to the drawings are illustrative and intended to explain the present utility model and should not be construed as limiting the utility model.
As shown in fig. 1, an embodiment of the present utility model further provides a flue gas waste heat recovery device, which includes a waste heat boiler 11 and a second heat exchange assembly 21, where the waste heat boiler 11 has a flue gas first inlet 111 and a flue gas first outlet 112, the flue gas first inlet 111 is connected with the flue gas exhaust pipe 50, and flue gas exhausted through the flue gas exhaust pipe 50 can enter the waste heat boiler 11 through the flue gas first inlet 111 to heat water in the waste heat boiler 11 to generate steam, and at the same time, the flue gas can be cooled, that is, a first cooling process of the flue gas exhausted by the flue gas exhaust pipe 50 is completed.
The second heat exchange assembly 21 is provided with a first medium flow passage and a second medium flow passage, the first medium flow passage is connected with the first flue gas outlet 112, the flue gas cooled by the waste heat boiler 11 enters the first medium flow passage of the second heat exchange assembly 21 through the first flue gas outlet 112 and exchanges heat with a medium in the second medium flow passage, so that the flue gas is cooled further, namely, the second cooling process of the flue gas exhausted by the flue gas exhaust pipeline 50 is completed, the temperature of the flue gas can be further reduced, the flue gas can meet the specified emission standard, and the flue gas is discharged conveniently. The direction indicated by an arrow a in fig. 1 is the flow direction of the flue gas in the flue gas waste heat recovery device.
In this embodiment, the flue gas waste heat recovery device further includes a steam turbine 12 and a second heat exchange assembly 13, the steam turbine 12 is connected with the waste heat boiler 11 to generate electricity by using steam generated by the waste heat boiler 11, the second heat exchange assembly 13 has a third medium flow passage and a fourth medium flow passage, and the third medium flow passage is connected with the steam turbine 12 and the waste heat boiler 11 to condense the steam discharged from the steam turbine 12 and then convey the condensed steam to the waste heat boiler 11.
Specifically, the flue gas can heat water in the waste heat boiler 11 to generate steam, the generated steam can be conveyed to the steam turbine 12 to drive the steam turbine 12 to do work to generate power, the steam after the steam turbine 12 does work is conveyed to the second heat exchange assembly 13 to exchange heat with a medium in the fourth medium channel, the steam can form condensation water after the second heat exchange assembly 13 finishes heat exchange, and the condensation water formed in the second heat exchange assembly 13 is conveyed to the waste heat boiler 11 to realize thermodynamic cycle among the waste heat boiler 11, the steam turbine 12 and the second heat exchange assembly 13. That is, the flue gas waste heat recovery device can utilize the flue gas waste heat to generate steam in the waste heat boiler 11 for flue gas cooling, and realize the power generation function by driving the steam turbine 12 to do work, so that the utilization rate of the flue gas is further improved.
In this embodiment, the flue gas waste heat recovery device further includes a heat supply network loop 31, where the heat supply network loop 31 is in communication with the second medium flow channel and the fourth medium flow channel, so that the medium in the second medium flow channel exchanges heat with the flue gas in the first medium flow channel, and the medium in the fourth medium flow channel exchanges heat with the steam in the third medium flow channel. That is, the fluid returned from the heat supply network user 40 may be transferred to the heat supply network user 40 after heat exchange with the second heat exchange assembly 21 and the second heat exchange assembly 13 through the heat supply network loop 31, thereby realizing a heating function.
In summary, in the flue gas waste heat recovery device disclosed in this embodiment, the flue gas waste heat can heat the water in the waste heat boiler 11 to generate steam, and then the steam drives the steam turbine 12 to do work to generate electricity, and the second heat exchange component 21 and the second heat exchange component 13 can exchange heat with the heat supply network loop 31 to realize heating, so that the utilization rate of the flue gas waste heat can be improved, the heat and power co-production efficiency is further improved, and the energy saving is facilitated.
In some embodiments, the heat supply network circuit 31 includes a main pipeline 311, the main pipeline 311 includes a first branch pipeline 3111, a second branch pipeline 3112, and a first control valve 3113, the first branch pipeline 3111 and the second branch pipeline 3112 are disposed in parallel, the first control valve 3113 is disposed on the first branch pipeline 3111, the second medium flow channel is connected to the second branch pipeline 3112, and the fourth medium flow channel is connected to the main pipeline 311.
Specifically, the heat supply network loop 31 may be connected to the heat supply network user 40, so that the fluid returned from the heat supply network user 40 flows to the heat supply network user 40 again after heat exchange through the main pipe 311, and a heating function is achieved. The first branch pipe 3111 and the second branch pipe 3112 are disposed in parallel on the main pipe 311, and an operator can adjust the opening degree of the first control valve 3113 so that the fluid returned from the heat grid user 40 can be divided into two parts, wherein one part of the fluid flows to the second heat exchange assembly 13 through the first branch pipe 3111 for heat exchange, and the other part of the fluid flows to the second heat exchange assembly 21 through the second branch pipe 3112 for heat exchange. That is, the operator can adjust the opening degree of the first control valve 3113 to change the fluid flow rates in the first branch pipe 3111 and the second branch pipe 3112, so as to maximize the utilization of the flue gas heat in the first medium flow channel and the steam heat in the third medium flow channel, which is helpful for improving the utilization rate of the flue gas waste heat.
In some embodiments, the second heat exchange assembly 21 and the second heat exchange assembly 13 are arranged in sequence along the flow direction of the fluid in the heat network circuit 31. That is, when the second branch pipe 3112 is opened, at least part of the fluid returned from the heat supply network user 40 first passes through the second heat exchange assembly 21 to perform the first heat exchange, then flows to the second heat exchange assembly 13 to perform the second heat exchange, and finally returns to the heat supply network user 40, so that the fluid with lower temperature returned from the heat supply network user 40 can absorb more heat of the flue gas in the first medium flow channel, the recycling rate of the flue gas waste heat is improved, the flue gas waste heat is utilized to the maximum, and the waste of the heat energy is reduced. The direction indicated by the arrow c in fig. 1 is the flow direction of the fluid in the heat supply network loop 31.
Of course, in some embodiments, the operator may also control the first control valve 3113 to close the first branch pipe 3111, so that all the fluid returned from the heat grid user 40 flows into the second heat exchange assembly 21 via the second branch pipe 3112 for the first heat exchange, and then flows to the second heat exchange assembly 13 for the second heat exchange. Accordingly, the first control valve 3113 may be provided as a flow rate adjustment valve or a switching valve.
In some embodiments, the second branch pipe 3112 is provided with a second control valve 3114 and a third control valve 3115, one of the second control valve 3114 and the third control valve 3115 is located at an inlet end of the second media flow channel, and the other of the second control valve 3114 and the third control valve 3115 is located at an outlet end of the second media flow channel.
Further, the second control valve 3114 and the third control valve 3115 may be disposed relatively close to the first branch pipe 3111 to reduce the possibility of turbulence of the fluid at the connection section of the second branch pipe 3112 and the first branch pipe 3111 when the second branch pipe 3112 is closed, ensuring stability of the fluid flow in the heat supply network circuit 31.
In some embodiments, the first heat exchange assembly 21 is a flue gas heat exchanger and the medium flowing in the first medium flow path is flue gas exiting the flue gas first outlet 112. Optionally, the first heat exchange assembly 21 is a tube stack type flue gas heat exchanger. Of course, in some embodiments, the first heat exchange assembly 21 may also be provided as a plate flue gas heat exchanger or a rotary flue gas heat exchanger.
Further, the flue gas heat exchanger is also provided with a flue gas discharge port and a temperature monitor, wherein the temperature monitor can be arranged at the flue gas discharge port to monitor the temperature of flue gas flowing out through the flue gas discharge port. When the temperature of the flue gas discharged from the flue gas discharge port is greater than the temperature threshold, the second control valve 3114 and the third control valve 3115 may be controlled to open, so that at least a portion of the fluid returned by the heat supply network user 40 flows into the second branch pipe 3112, and the portion of the fluid may exchange heat with the flue gas in the first medium flow passage in the second medium flow passage, so as to reduce the temperature of the flue gas discharged from the flue gas discharge port. In addition, the operator can control the opening and closing degree of the first control valve 3113 according to the flue gas temperature to adjust the fluid flow in the second branch pipe 3112, so as to maximize the utilization of the waste heat of flue gas for heating.
Alternatively, the second control valve 3114 and the third control valve 3115 are provided as on-off valves, and of course, the second control valve 3114 and the third control valve 3115 may also be provided as the same structural elements as the first control valve 3113.
It should be noted that, in the use process of the flue gas waste heat recovery device, the temperature monitor needs to monitor the flue gas temperature discharged from the flue gas discharge port in real time, so that the flue gas meets the specified discharge standard. Alternatively, the temperature threshold may be set between 70 ℃ and 90 ℃.
In some embodiments, heat-net circuit 31 further includes a first pump body 312, first pump body 312 being disposed on main conduit 311. The first pump body 312 is capable of driving the circulation of fluid in the heat supply network circuit 31.
In some embodiments, the second heat exchange assembly 13 is a condenser, and a second pump body 14 is disposed between the condenser and the waste heat boiler 11. The condenser can convert the steam discharged from the steam turbine 12 into liquid water, and then the liquid water is conveyed to the waste heat boiler 11 under the action of the second pump body 14, so that sufficient makeup water is provided for the waste heat boiler 11, and stable operation in the whole cycle is ensured. And the condenser condenses the steam discharged from the steam turbine 12 into liquid water, so that vacuum can be formed at the steam outlet of the steam turbine 12, the steam is expanded to the lowest pressure in the steam turbine 12, the work-doing efficiency of the steam in the steam turbine 12 is increased, and the cycle thermal efficiency is improved.
Alternatively, the first pump body 312 and the second pump body 14 may be provided as centrifugal pumps or axial flow pumps.
In some embodiments, the steam turbine 12 includes a high pressure cylinder 121, a low pressure cylinder 122, and a first generator 123, and the high pressure cylinder 121 and the low pressure cylinder 122 are disposed in this order along the flow direction of the steam generated by the heat recovery boiler 11. The direction indicated by the arrow b in fig. 1 is the flow direction of the steam generated by the heat recovery boiler 11.
Specifically, the high pressure cylinder 121 and the low pressure cylinder 122 can drive the first power generator 123 to operate to generate power. When the steam generated by the waste heat boiler 11 enters the initial stage of the steam turbine 12, the blades of the high-pressure cylinder 121 are utilized to convert the steam into kinetic energy, so that the acceleration of the air flow in the initial stage is assisted, and the working efficiency of the steam in the steam turbine 12 can be increased. After leaving the high pressure cylinder 121, the steam enters the low pressure cylinder 122 and is continuously converted into kinetic energy until the rest of the steam can hardly work in the low pressure cylinder 122, so that the efficiency of the steam turbine 12 can be maximized, and the steam can be effectively converted into kinetic energy under the steam conditions of different pressures and temperatures.
In some embodiments, waste heat boiler 11 has a high pressure outlet 113 and a low pressure outlet 114, high pressure outlet 113 being connected to high pressure cylinder 121 such that high pressure steam generated by waste heat boiler 11 is delivered to high pressure cylinder 121, low pressure outlet 114 being connected to low pressure cylinder 122 such that low pressure steam generated by waste heat boiler 11 is delivered to low pressure cylinder 122.
Specifically, the exhaust-heat boiler 11 is a dual-pressure boiler, that is, the exhaust-heat boiler 11 can generate steam with different pressures, and the steam is correspondingly conveyed to the high-pressure cylinder 121 and the low-pressure cylinder 122 from the high-pressure outlet 113 and the low-pressure outlet 114, so that the utilization rate of the steam is improved, and the power productivity is further improved. Wherein, the pressure of the steam discharged from the waste heat boiler 11 through the high pressure outlet 113 can be between 6.5MPa and 10.0MPa, and the pressure of the steam discharged from the waste heat boiler 11 through the low pressure outlet 114 can be between 0.1MPa and 6.5 MPa.
Further, the steam exhausted from the exhaust-heat boiler 11 through the low-pressure outlet 114 can be mixed with the steam exhausted from the high-pressure cylinder 121 and then conveyed to the low-pressure cylinder 122, so as to drive the low-pressure cylinder 122 to do work, thereby improving the utilization rate of the steam and further improving the electricity generating efficiency.
In addition, the flue gas waste heat recovery device can be used for a gas turbine power generation system and a coal-fired power generation system. As shown in fig. 2, in an embodiment of the present utility model, there is further provided a cogeneration system of a gas turbine 60, which includes the gas turbine 60 and the above-mentioned flue gas recovery device, wherein the gas turbine 60 has a flue gas duct 50, and the flue gas recovery device is in communication with the flue gas duct 50.
Further, the gas turbine 60 includes a compressor 61, a combustor 62, a gas turbine 63, and a second generator 64. In the working process, air and fuel compressed by the compressor 61 are delivered to the combustion chamber 62 for combustion, so that the gas turbine 63 is driven to do work, and the gas turbine 63 drives the second generator 64 to operate so as to realize power supply. Wherein the air inlet line shown in fig. 2 d; e shows the inlet line for the fuel.
In addition, the flue gas waste heat recovery device provided in the above embodiment may be suitable for the gas turbine cogeneration system, so the beneficial effects that the gas turbine cogeneration system can achieve can refer to the beneficial effects corresponding to the flue gas waste heat recovery device provided above, and will not be described in detail here.
In the description of the present utility model, it should be understood that the directions or positional relationships indicated by the terms "center", "upper", "lower", "inner", "outer", etc., are based on the directions or positional relationships shown in the drawings, are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present utility model.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present utility model, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.
In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; may be mechanically connected, may be electrically connected or may be in communication with each other; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.
In the present utility model, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.
For purposes of this disclosure, the terms "one embodiment," "some embodiments," "example," "a particular example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.
While the above embodiments have been shown and described, it should be understood that the above embodiments are illustrative and not to be construed as limiting the utility model, and that variations, modifications, alternatives, and variations of the above embodiments may be made by those of ordinary skill in the art without departing from the scope of the utility model.
Claims (10)
1. The utility model provides a flue gas waste heat recovery device which characterized in that, it includes:
the exhaust-heat boiler is provided with a first flue gas inlet and a first flue gas outlet, and the first flue gas inlet is connected with a smoke exhaust pipeline;
the steam turbine is connected with the waste heat boiler to generate electricity by utilizing steam generated by the waste heat boiler;
the first heat exchange assembly is provided with a first medium flow passage and a second medium flow passage, and the first medium flow passage is connected with the first flue gas outlet;
the second heat exchange assembly is provided with a third medium flow passage and a fourth medium flow passage, and the third medium flow passage is connected with the steam turbine and the waste heat boiler so as to condense the steam discharged by the steam turbine and then convey the condensed steam to the waste heat boiler;
and the heat supply network loop is communicated with the second medium flow channel and the fourth medium flow channel, so that the medium in the second medium flow channel exchanges heat with flue gas in the first medium flow channel and the medium in the fourth medium flow channel exchanges heat with steam in the third medium flow channel.
2. The flue gas waste heat recovery device according to claim 1, wherein the heat supply network circuit comprises a main pipeline, the main pipeline is provided with a first branch pipeline, a second branch pipeline and a first control valve, the first branch pipeline and the second branch pipeline are arranged in parallel, the first control valve is arranged in the first branch pipeline, the second medium flow passage is connected to the second branch pipeline, and the fourth medium flow passage is connected to the main pipeline.
3. The flue gas waste heat recovery device according to claim 2, wherein a second control valve and a third control valve are arranged on the second branch pipe, one of the second control valve and the third control valve is located at an inlet end of the second medium flow passage, and the other of the second control valve and the third control valve is located at an outlet end of the second medium flow passage.
4. A flue gas waste heat recovery device according to claim 3, wherein the first heat exchange assembly and the second heat exchange assembly are arranged in sequence along the flow direction of the fluid in the heat supply network circuit.
5. The flue gas waste heat recovery device according to claim 1, wherein the first heat exchange assembly is a flue gas heat exchanger.
6. The flue gas waste heat recovery device according to claim 1, wherein the heat supply network circuit further comprises a first pump body to drive the fluid in the heat supply network circuit to circulate.
7. The flue gas waste heat recovery device according to claim 1, wherein the second heat exchange component is a condenser, and a second pump body is arranged between the condenser and the waste heat boiler.
8. The flue gas waste heat recovery device according to any one of claims 1 to 7, wherein the steam turbine includes a high pressure cylinder and a low pressure cylinder, which are arranged in order along a flow direction of steam discharged from the waste heat boiler.
9. The flue gas waste heat recovery device according to claim 8, wherein the waste heat boiler has a high pressure outlet connected to the high pressure cylinder to allow high pressure steam discharged from the waste heat boiler to be delivered to the high pressure cylinder, and a low pressure outlet connected to the low pressure cylinder to allow low pressure steam discharged from the waste heat boiler to be delivered to the low pressure cylinder.
10. A gas turbine cogeneration system, characterized in that it comprises a gas turbine, a flue gas waste heat recovery device according to any one of the preceding claims 1 to 9, said gas turbine having a flue gas duct, said flue gas waste heat recovery device being connected to said flue gas duct.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322479233.1U CN220687416U (en) | 2023-09-13 | 2023-09-13 | Flue gas waste heat recovery device and gas turbine cogeneration system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322479233.1U CN220687416U (en) | 2023-09-13 | 2023-09-13 | Flue gas waste heat recovery device and gas turbine cogeneration system |
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| CN220687416U true CN220687416U (en) | 2024-03-29 |
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| CN202322479233.1U Active CN220687416U (en) | 2023-09-13 | 2023-09-13 | Flue gas waste heat recovery device and gas turbine cogeneration system |
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