CN217604209U - Peak regulating device based on steam turbine bypass heat supply coupling absorption heat pump - Google Patents
Peak regulating device based on steam turbine bypass heat supply coupling absorption heat pump Download PDFInfo
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- CN217604209U CN217604209U CN202220727114.6U CN202220727114U CN217604209U CN 217604209 U CN217604209 U CN 217604209U CN 202220727114 U CN202220727114 U CN 202220727114U CN 217604209 U CN217604209 U CN 217604209U
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Abstract
The utility model provides a peak regulation device based on steam turbine bypass heat supply coupling absorption heat pump, include: the boiler is used for heating the feed water of the thermal power generating unit; the high-pressure cylinder is connected with the boiler and used for converting the heat energy in the thermal power generating unit into mechanical energy; the absorption heat pump is connected with the intermediate pressure cylinder and used for transferring heat energy in the thermal power generating unit so as to heat circulating water of a heat supply network; and the spike heater is connected with the absorption heat pump and used for heating the circulating water of the heat supply network. The utility model provides the high heat economy nature of heat supply unit has enlarged the heating capacity of unit simultaneously, has improved the maximum thermoelectric ratio of combined heat and power generation unit to make unit thermoelectric decoupling zero ability promote by a wide margin.
Description
Technical Field
The utility model discloses a thermal power generation technique especially relates to a peak regulation device based on steam turbine bypass heat supply coupling absorption heat pump.
Background
The rapid development of new energy sources such as wind power, photovoltaic and the like becomes one of the important tasks of the current power development, and the installed capacity ratio of the wind power and the solar power generation is continuously improved. Due to the randomness and instability of new energy power generation, the problems of grid connection difficulty, consumption difficulty, scheduling difficulty and the like are faced at present, and great challenges are brought to the safe operation of a power system. The coal-electricity unit has the characteristics of stability and controllability, and the unit participates in deep peak shaving on a large scale through flexible transformation of coal electricity, so that the method is an effective way for solving the problem of new energy consumption.
The heat and power cogeneration mode of the thermal power generating unit is operated in winter, the heat supply unit is seriously restricted by the operation mode of 'fixing the power by heat', the peak regulation capacity of the unit is limited, how to solve the heat and power contradiction in the heat supply period and improve the deep peak regulation capacity of the thermal power cogeneration unit becomes the key direction of the thermal power industry.
The bypass heat supply of the steam turbine is a mode of extracting part of main steam or reheated steam, bypassing a high-pressure cylinder or a medium-pressure cylinder and directly entering a heat supply network heater for heat supply. The mode can effectively reduce the generating output of the unit and realize deep peak regulation of the unit under the condition of improving the heat supply capacity, and has small unit transformation investment and certain application value. However, the method sacrifices certain thermal economy, causes energy waste, and has limitations, so that parameter matching of the bypass heating process is realized, the energy-saving potential is developed, and the method is an effective way for improving the wide applicability of the scheme.
SUMMERY OF THE UTILITY MODEL
The utility model provides a peak regulation device based on steam turbine bypass heat supply coupling absorption heat pump can improve the heat economy nature of heat supply unit, and bypass heat supply coupling absorption heat pump heating system has enlarged the heating capacity of unit simultaneously, has improved the maximum heat-power ratio of combined heat and power generation unit, and unit thermoelectric decoupling zero ability promotes by a wide margin.
In order to achieve the above object, a peak regulation device based on a steam turbine bypass heating coupling absorption heat pump is provided, which includes:
the boiler is used for heating the feed water of the thermal power generating unit;
the high-pressure cylinder is connected with the boiler and used for converting the heat energy in the thermal power generating unit into mechanical energy;
an intermediate pressure cylinder connected with the high pressure cylinder,
a low pressure cylinder connected with the intermediate pressure cylinder,
the absorption heat pump is connected with the intermediate pressure cylinder and used for transferring heat energy in the thermal power generating unit so as to heat circulating water of a heat supply network;
and the spike heater is connected with the absorption heat pump and is used for heating the circulating water of the heat supply network.
In one embodiment, a high-pressure bypass pipeline is arranged between a steam inlet pipeline and a steam exhaust pipeline of the high-pressure cylinder;
the high-pressure bypass pipeline is provided with a first temperature and pressure reducing device.
In one embodiment, the low temperature heat source of the absorption heat pump is at least one of flue gas, dead steam and circulating cooling water.
In one embodiment, a second temperature and pressure reducing device is arranged on a pipeline connecting the intermediate pressure cylinder and the absorption heat pump.
In one embodiment, the peak shaving apparatus based on the turbine bypass heating coupling absorption heat pump further comprises:
the exhaust device is respectively connected with the intermediate pressure cylinder and the low pressure cylinder; and a third temperature and pressure reducing device is arranged on a pipeline connecting the exhaust device and the intermediate pressure cylinder.
In one embodiment, the spike heater is further coupled to the exhaust;
and a first branch pipeline is arranged on a pipeline connecting the intermediate pressure cylinder and the low pressure cylinder, and the first branch pipeline is connected with the peak heater.
In one embodiment, a second branch pipeline is arranged on a pipeline of the second temperature and pressure reducing device connected with the absorption heat pump, and the second branch pipeline is connected with the first branch pipeline.
In one embodiment, a fourth temperature and pressure reducing device is disposed on the second branch pipe.
In one embodiment, electrically operated valves are respectively disposed on the first branch pipe, the second branch pipe, the pipe connecting the intermediate pressure cylinder and the low pressure cylinder, and the pipe connecting the absorption heat pump and the second branch pipe.
In one embodiment, the peak shaving apparatus based on the steam turbine bypass heating coupling absorption heat pump further comprises:
and the deaerator is connected with the absorption heat pump.
From the above description, the embodiment of the present invention provides a peak regulation device based on a steam turbine bypass heat supply coupling absorption heat pump, which is based on a conventional bypass heat supply deep peak regulation device, and an absorption heat pump device is added. When the unit participates in deep peak regulation, the absorption heat pump can be driven by high-parameter steam of the steam turbine bypass to supply heat, so that the heat economic loss caused by directly heating the circulating water of the low-temperature heat supply network by high-parameter bypass steam extraction is reduced; and this system can be according to the difference of unit peak regulation degree of depth, nimble heat supply flow that changes, and the energy level matching of heating link is realized to the at utmost, compares with conventional steam turbine bypass heat supply peak regulation device, the utility model provides a peak regulation device based on steam turbine bypass heat supply coupling absorption heat pump has further optimized the parameter matching problem of bypass heat supply system's heat supply flow, has realized the cascade utilization of steam turbine bypass extraction, has improved the heat economy nature of heat supply unit. Meanwhile, the heat supply capacity of the unit is enlarged by the bypass heat supply coupling absorption heat pump heat supply system, the maximum thermoelectric ratio of the cogeneration unit is improved, and the thermoelectric decoupling capacity of the unit is greatly improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts. In the drawings:
fig. 1 is a schematic structural diagram of a peak regulation device based on a turbine bypass heat supply coupling absorption heat pump according to an embodiment of the present invention.
Reference numerals:
1: high pressure cylinder
2: intermediate pressure cylinder
3: low pressure cylinder
4: boiler
5: absorption heat pump
6: peak heater
7: first temperature and pressure reducing device
8: third temperature and pressure reducing device
9: second temperature and pressure reducing device
10: fourth temperature and pressure reducing device
11: first electric valve
12: second electric valve
13: third electric valve
14: exhaust device
15: first branch pipeline
16: second branch pipeline
17: a deaerator.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the embodiments of the present invention are described in further detail below with reference to the accompanying drawings. The exemplary embodiments and descriptions of the present invention are provided to explain the present invention, but not to limit the present invention.
Fig. 1 is a schematic structural section view of a peak shaving device of a coupled absorption heat pump based on a bypass heat supply of a steam turbine according to an embodiment of the present invention. As shown in fig. 1, the peak shaving apparatus includes: the boiler 4 is used for heating the feed water of the thermal power generating unit; the high-pressure cylinder 1 is connected with the boiler 4 and is used for converting the heat energy in the thermal power generating unit into mechanical energy; the system comprises a high-pressure cylinder 1, a low-pressure cylinder 3, an absorption heat pump 5 and a heat supply network circulating water, wherein the high-pressure cylinder 2 is connected with the low-pressure cylinder 3; and the spike heater 6 is connected with the absorption heat pump 5 and used for heating the circulating water of the heat supply network.
In one embodiment, a high-pressure bypass pipeline is arranged between the steam inlet pipeline and the steam exhaust pipeline of the high-pressure cylinder 1; the high-pressure bypass pipeline is provided with a first temperature and pressure reducing device 7. Part of the main steam passes through the high-side pipeline temperature and pressure reducing device 7 and then is connected to a reheating cold end steam pipeline.
In one embodiment, the low temperature heat source of the absorption heat pump 5 is at least one of flue gas, dead steam and circulating cooling water (19 in fig. 1).
In one embodiment, a second temperature and pressure reducing device 9 is disposed on a pipeline connecting the intermediate pressure cylinder 2 and the absorption heat pump 5.
In one embodiment, the peak regulation device based on the steam turbine bypass heating coupling absorption heat pump further comprises:
an exhaust device 14 connected to the intermediate pressure cylinder 2 and the low pressure cylinder 3, respectively; and a third temperature and pressure reducing device 8 is arranged on a pipeline connecting the exhaust device 14 and the intermediate pressure cylinder 2.
In one embodiment, the spike heater 6 is further connected to the exhaust 14;
the pipeline that intermediate pressure cylinder 2 with low pressure cylinder 3 is connected is provided with first branch pipeline 15, first branch pipeline 15 with spike heater 6 is connected.
It can be understood that the circulating backwater of the heat supply network is heated by the absorption heat pump 5 and then enters the peak heater 6 for heating.
In an embodiment, a second branch pipeline 16 is disposed on a pipeline connecting the second temperature and pressure reducing device 9 and the absorption heat pump 5, and the second branch pipeline 16 is connected to the first branch pipeline 15.
According to the embodiment, in the utility model, the reheating section steam pipeline is divided into four branches, one branch is connected with the steam inlet pipeline of the intermediate pressure cylinder 2 and enters the intermediate pressure cylinder 2 to continue to work; one branch is a pipeline from low side steam to the steam exhaust device, the low side steam enters the steam exhaust device 14 after passing through the temperature and pressure reduction device of the low side pipeline, the other branch is connected with a steam inlet pipeline of a driving steam source of the absorption heat pump 5, and the low side steam enters the absorption heat pump for heat supply after passing through the temperature and pressure reduction device of the low side pipeline to the absorption heat pump 5; one branch is a peak heater 6 air source pipeline, and low side steam enters heating network circulating water in the peak heater 6 after passing through a low side pipeline temperature reduction and pressure reduction device.
In one embodiment, the second branch pipe 16 is provided with a fourth temperature and pressure reducing device 10.
It can be understood that, in this embodiment, the upper steam extraction and heat supply pipeline of the middle-low pressure communicating pipe is divided into two branches, one branch is connected with the steam inlet pipeline of the driving steam source of the absorption heat pump 5, and the steam of the middle-low pressure communicating pipe enters the absorption heat pump 5 for heat supply after being exhausted to the pipeline temperature reduction and pressure reduction device of the absorption heat pump 5; one branch is a peak heater 6 gas source pipeline, and the middle exhaust steam (released by the middle pressure cylinder 2) enters the peak heat supply network heater to heat the circulating water of the heat supply network.
In one embodiment, the first branch pipe 15, the second branch pipe 16, the pipe connecting the intermediate pressure cylinder 2 and the low pressure cylinder 3, and the pipe connecting the absorption heat pump 5 and the second branch pipe 16 are respectively provided with an electric valve.
Specifically, a second electric valve 12 is arranged on a low side steam to peak heater steam inlet pipeline, a first electric valve 11 is arranged on a medium exhaust steam to peak heater steam inlet pipeline, and a third electric valve 13 is arranged on a low side steam to steam exhaust device inlet pipeline.
In one embodiment, the peak regulation device based on the steam turbine bypass heating coupling absorption heat pump further comprises: and the deaerator 17 is connected with the absorption heat pump 5.
The principle of the deaerator is that water is sprayed out in a spiral shape through a film drawing pipe according to a certain angle to exchange heat with heating steam to deaerate, the supplied water is heated to the saturation temperature corresponding to the working pressure of the deaerator, oxygen and other gases dissolved in the supplied water are removed, and corrosion of a boiler water supply pipe, an economizer and other accessory equipment is prevented and reduced.
In order to further explain this scheme, still provide here the utility model provides a peak regulation device's based on steam turbine bypass heat supply coupling absorption heat pump practical flow, specifically:
in the heat supply season, when the unit does not participate in deep peak regulation, the heat supply steam source is from the medium pressure cylinder to exhaust steam. At the moment, the high-side pipeline temperature and pressure reducing device, the low-side to absorption heat pump pipeline temperature and pressure reducing device and the low-side steam to steam exhaust device pipeline electric valves (a first electric valve 11, a second electric valve 12 and a third electric valve 13) are all closed, the middle exhaust steam is exhausted to the absorption heat pump pipeline temperature and pressure reducing device to be opened, and the absorption heat pump is driven by the steam of a middle-low pressure communicating pipe; the middle exhaust steam extraction is started until the peak heater is started, the second electric valve 12 of the low side steam extraction to the peak heater is closed, and the peak heating steam source is provided by the middle exhaust steam extraction. The circulating water backwater of the heat supply network is heated to about 90 ℃ by the absorption heat pump and then enters the peak heater for heating.
Under the condition that the unit participates in deep peak shaving, when the steam inlet flow of the low-pressure cylinder of the unit reaches the minimum cooling flow of the low-pressure cylinder of the steam turbine, the high-side pipeline temperature and pressure reducing device and the low-side pipeline temperature and pressure reducing device are started, and at the moment, the absorption heat pump drives steam to be provided by bypass steam and middle exhaust steam together. Along with the increase of the peak-shaving depth, the opening degrees of the high-side pipeline temperature and pressure reducing device and the low-side pipeline temperature and pressure reducing device of the absorption heat pump are gradually adjusted, meanwhile, the opening degree of the middle-exhaust steam extraction to the absorption heat pump pipeline temperature and pressure reducing device is reduced until the middle-exhaust steam extraction is completely closed until the absorption heat pump pipeline temperature and pressure reducing device is completely closed, and at the moment, the absorption heat pump drives steam to be completely provided by bypass steam.
Further, as the peak shaving depth increases, the opening degree of the high-side pipeline temperature and pressure reducing device needs to be adjusted, the low-side pipeline temperature and pressure reducing device is started, bypass steam is started to the second electric valve 12 for steam admission of the peak heater, and at the moment, a steam source of the peak heater is provided by the middle exhaust steam extraction and the bypass steam together; and when the peak regulation depth is continuously increased, continuously adjusting the opening degrees of the high-side pipeline temperature and pressure reducing device and the low-side pipeline temperature and pressure reducing device, gradually increasing the opening degree of the bypass steam to the second electric valve 12 of the peak heater, and reducing the opening degree of the middle exhaust steam to the first electric valve 11 of the steam inlet of the peak heater until the middle exhaust steam is closed to the first electric valve 11 of the steam inlet of the peak heater. The spike heater steam source is now provided entirely by the bypass steam.
Finally, when the required peak regulation depth is continuously increased, the opening degrees of the high-side pipeline temperature and pressure reduction device and the low-side pipeline temperature and pressure reduction device can be adjusted, the third electric valve 13 of the inlet pipeline of the steam exhaust device is gradually opened for low-side steam, and part of steam bypasses the high-middle and low-pressure cylinders and is directly exhausted to the steam exhaust device so as to meet the peak regulation requirement of the power grid.
From the above description, the embodiment of the present invention provides a peak regulation device based on a steam turbine bypass heat supply coupling absorption heat pump, including: the boiler is used for heating the feed water of the thermal power generating unit; the high-pressure cylinder is connected with the boiler and is used for converting the heat energy in the thermal power generating unit into mechanical energy; the absorption heat pump is connected with the intermediate pressure cylinder and used for transferring heat energy in the thermal power generating unit so as to heat circulating water of a heat supply network; and the peak heater is connected with the absorption heat pump and used for heating the circulating water of the heat supply network.
The utility model discloses an on the basis of conventional bypass heat supply degree of depth peak regulation device, absorption heat pump device has been add. When the unit participates in deep peak regulation, high-parameter steam in the bypass of the steam turbine can be used for driving the absorption heat pump to supply heat, so that the heat economic loss caused by directly heating circulating water of the low-temperature heat supply network by high-parameter bypass steam extraction is reduced; and this system can be according to the difference of unit peak regulation degree of depth, nimble heat supply flow that changes, and the energy level matching of heating link is realized to the at utmost, compares with conventional steam turbine bypass heat supply peak regulation device, the utility model provides a peak regulation device based on steam turbine bypass heat supply coupling absorption heat pump has further optimized the parameter matching problem of bypass heat supply system's heat supply flow, has realized the cascade utilization of steam turbine bypass extraction, has improved the heat economy nature of heat supply unit. Meanwhile, the heat supply capacity of the unit is enlarged by the bypass heat supply coupling absorption heat pump heat supply system, the maximum thermoelectric ratio of the cogeneration unit is improved, and the thermoelectric decoupling capacity of the unit is greatly improved.
In the description herein, reference to the description of the terms "one embodiment," "a particular embodiment," "some embodiments," "for example," "an example," "a particular example," or "some examples," etc., means 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 invention. In this specification, the schematic representations of the terms used above do not necessarily refer 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. The sequence of steps involved in the embodiments is for illustrative purposes, and the sequence of steps is not limited and may be adjusted as desired.
The above-mentioned embodiments, further detailed description of the objects, technical solutions and advantages of the present invention, it should be understood that the above-mentioned embodiments are only specific embodiments of the present invention, and are not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (10)
1. A peak regulation device based on a steam turbine bypass heat supply coupling absorption heat pump is characterized by comprising:
the boiler is used for heating the feed water of the thermal power generating unit;
the high-pressure cylinder is connected with the boiler and used for converting the heat energy in the thermal power generating unit into mechanical energy;
an intermediate pressure cylinder connected with the high pressure cylinder,
a low pressure cylinder connected with the intermediate pressure cylinder,
the absorption heat pump is connected with the intermediate pressure cylinder and used for transferring heat energy in the thermal power generating unit so as to heat circulating water of a heat supply network;
and the spike heater is connected with the absorption heat pump and used for heating the circulating water of the heat supply network.
2. The peak shaving apparatus according to claim 1,
a high-pressure bypass pipeline is arranged between the steam inlet pipeline and the steam exhaust pipeline of the high-pressure cylinder;
the high-pressure bypass pipeline is provided with a first temperature and pressure reducing device.
3. The peak shaving apparatus according to claim 1, wherein the low temperature heat source of the absorption heat pump is at least one of flue gas, dead steam, and circulating cooling water.
4. The peak shaving apparatus according to claim 1, wherein a second temperature and pressure reduction device is arranged on a pipeline connecting the intermediate pressure cylinder and the absorption heat pump.
5. The peak shaving apparatus according to claim 4, further comprising:
an exhaust device connected to the intermediate pressure cylinder and the low pressure cylinder, respectively; and a third temperature and pressure reducing device is arranged on a pipeline connecting the exhaust device and the intermediate pressure cylinder.
6. The peak shaving apparatus according to claim 5,
the spike heater is also connected with the exhaust device;
the pipeline that the intermediate pressure cylinder with the low pressure cylinder is connected is provided with first branch pipeline, first branch pipeline with the peak heater is connected.
7. The peak shaving apparatus according to claim 6, wherein a second branch pipeline is arranged on a pipeline of the second temperature and pressure reduction apparatus connected to the absorption heat pump, and the second branch pipeline is connected to the first branch pipeline.
8. A peak shaving apparatus according to claim 7, wherein the second branch conduit is provided with a fourth temperature and pressure reducing device.
9. The peak shaving apparatus according to claim 8,
and the first branch pipeline, the second branch pipeline, the pipeline for connecting the intermediate pressure cylinder and the low pressure cylinder and the pipeline for connecting the absorption heat pump and the second branch pipeline are respectively provided with an electric valve.
10. The peak shaving apparatus according to claim 1, further comprising:
and the deaerator is connected with the absorption heat pump.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220727114.6U CN217604209U (en) | 2022-03-31 | 2022-03-31 | Peak regulating device based on steam turbine bypass heat supply coupling absorption heat pump |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220727114.6U CN217604209U (en) | 2022-03-31 | 2022-03-31 | Peak regulating device based on steam turbine bypass heat supply coupling absorption heat pump |
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| CN217604209U true CN217604209U (en) | 2022-10-18 |
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| CN202220727114.6U Active CN217604209U (en) | 2022-03-31 | 2022-03-31 | Peak regulating device based on steam turbine bypass heat supply coupling absorption heat pump |
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| CN (1) | CN217604209U (en) |
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- 2022-03-31 CN CN202220727114.6U patent/CN217604209U/en active Active
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