CN216240840U - Power plant combined supply system - Google Patents
Power plant combined supply system Download PDFInfo
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- CN216240840U CN216240840U CN202121629227.4U CN202121629227U CN216240840U CN 216240840 U CN216240840 U CN 216240840U CN 202121629227 U CN202121629227 U CN 202121629227U CN 216240840 U CN216240840 U CN 216240840U
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Abstract
The embodiment of the application provides a power plant combined supply system, relates to machinery to improve the problem that the steam exhaust heating of a pressure cylinder in a main steam turbine can cause energy loss. The power plant combined supply system comprises: a main turbine intermediate pressure cylinder, a main turbine low pressure cylinder, a condenser, a backpressure turbine, an absorption heat pump/refrigerator and a heat exchange device; the main turbine medium pressure cylinder is respectively connected with the main turbine low pressure cylinder and the backpressure turbine, the main turbine low pressure cylinder is connected with the condenser, the backpressure turbine is connected with the absorption heat pump/refrigerator, the condenser is connected with the absorption heat pump/refrigerator, and the heat exchange device is connected with the absorption heat pump/refrigerator.
Description
Technical Field
The application relates to the field of machinery, especially, relate to a power plant's joint supply system.
Background
The combined supply system of the power plant can provide steam for the heat exchange station by adopting a steam extraction mode from a communicating pipe of a main steam turbine intermediate pressure cylinder and a main steam turbine low pressure cylinder. The steam discharge parameters of the main turbine medium pressure cylinder are mainly selected by considering the equipment structure, cost and economy, the steam pressure is usually 0.5-1.5 MPa, and the temperature is more than 250 ℃. However, for heating, the hot water temperature is above 90 ℃, and the steam pressure is 0.1-0.15 MPa, which can meet the requirement, and is much lower than the steam discharge parameter of the steam turbine medium pressure cylinder. That is, direct use of the main turbine cylinder exhaust for heating results in energy losses.
SUMMERY OF THE UTILITY MODEL
The embodiment of the application provides a power plant combined supply system to improve the problem that the steam exhaust heating of a pressure cylinder in a main steam turbine can cause energy loss.
The embodiment of the application provides a power plant's combined supply system, power plant's combined supply system includes: a main turbine intermediate pressure cylinder, a main turbine low pressure cylinder, a condenser, a backpressure turbine, an absorption heat pump/refrigerator and a heat exchange device; the main steam turbine intermediate pressure cylinder comprises a first inlet and a first outlet, the main steam turbine low pressure cylinder comprises a second inlet and a second outlet, the condenser comprises a steam inlet, a condensed water outlet, a cooling water inlet and a cooling water outlet, the backpressure steam turbine comprises a third inlet and a third outlet, and the absorption heat pump/refrigerator comprises a heating steam inlet, a heating steam outlet, a first medium inlet, a first medium outlet, a second medium inlet and a second medium outlet; the first outlet is connected with the second inlet and the third inlet respectively, the second outlet is connected with the steam inlet, the cooling water inlet is connected with the second medium outlet, the cooling water outlet is connected with the second medium inlet, the third outlet is connected with the heating steam inlet, and the first medium outlet is connected with the first medium inlet through the heat exchange device.
Optionally, the power plant combined supply system further includes: a first valve through which the first outlet is connected to the third inlet.
Optionally, the power plant combined supply system further includes: the back pressure steam turbine also comprises a fourth outlet, the heater comprises a fourth inlet, a fifth outlet, a third medium inlet and a third medium outlet, the fourth outlet is connected with the fourth inlet, the first medium outlet is connected with the third medium inlet, and the third medium outlet is connected with the first medium inlet through the heat exchange device.
Optionally, the power plant combined supply system further includes: a second valve through which the fourth outlet is connected to the fourth inlet.
Optionally, the power plant combined supply system further includes: and the first medium outlet is connected with the first medium inlet through the heat exchange device and the delivery pump respectively.
Optionally, the transfer pump is a circulation pump.
Optionally, the power plant combined supply system further includes: and the main turbine low-pressure cylinder is provided with a first power output shaft, and the first power output shaft is connected with the first generator.
Optionally, the power plant combined supply system further includes: and the backpressure steam turbine is provided with a second power output shaft, and the second power output shaft is connected with the second generator.
Optionally, the power plant combined supply system further includes: and the cooling water outlet is connected with the second medium inlet through the third valve.
Optionally, the power plant combined supply system further includes: the cooling tower comprises a fifth inlet and a sixth outlet, the cooling water outlet is connected with the fifth inlet through the fourth valve, the second medium inlet is connected with the fifth inlet through the third valve and the fourth valve respectively, and the sixth outlet is connected with the second medium outlet and the cooling water inlet through the fifth valve respectively.
The embodiment of the application adopts at least one technical scheme which can achieve the following beneficial effects:
in the embodiment of the application, the back pressure turbine can be used for reducing the pressure and enthalpy of the heating steam of the absorption heat pump/refrigerator, the gradient utilization of energy can be realized, and the problem of energy loss caused by the steam exhaust heating of a pressure cylinder in the main turbine can be solved.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments or related technologies of the present application, the drawings needed to be used in the description of the embodiments or related technologies are briefly introduced below, it is obvious that the drawings in the following description are only some embodiments described in the present application, and for those skilled in the art, other drawings can be obtained according to these drawings without any creative effort.
Fig. 1 is a schematic diagram of a power plant cogeneration system provided by an embodiment of the present application;
FIG. 2 is a schematic diagram of another power plant cogeneration system provided by an embodiment of the present application;
fig. 3 is a schematic diagram of another power plant cogeneration system provided in an embodiment of the present application.
Description of reference numerals: 100-a power plant combined supply system; 110-main turbine intermediate pressure cylinder; 1101-a first inlet; 1102 — a first outlet; 115-main turbine low pressure cylinder; 1151-a second inlet; 1152-a second outlet; 120-a condenser; 1201-a steam inlet; 1202-outlet for condensed water; 1203-cooling water inlet; 1204-cooling water outlet; 125-back pressure turbine; 1251-a third inlet; 1252-a third outlet; 1253-a fourth outlet; 130-absorption heat pump/chiller; 1301-heating steam inlet; 1302-heating steam outlet; 1303 — a first medium inlet; 1304-a first media outlet; 1305-a second medium inlet; 1306-a second medium outlet; 135-heat exchange means; 140-a heater; 1401-a fourth inlet; 1402-fifth outlet; 1403-third medium inlet; 1404-a third medium outlet; 1451-a first valve; 1452-a second valve; 1453-a third valve; 1454-a fourth valve; 1455-a fifth valve; 150-a delivery pump; 1551-first generator; 1552-second generator; 160-a cooling tower; 1601-a fifth inlet; 1602-sixth outlet.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below with reference to the specific embodiments of the present invention and the accompanying drawings. It is to be understood that the described embodiments are merely exemplary of the utility model, and not restrictive of the full scope of the utility model. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present application, it is to be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present application and for simplicity in description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the present application.
In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.
Further, although the terms used in the present invention are selected from publicly known and used terms, some of the terms mentioned in the description of the present invention may be selected by the applicant at his or her discretion, the detailed meanings of which are described in relevant parts of the description herein.
Furthermore, it is required that the present invention is understood, not simply by the actual terms used but by the meaning of each term lying within.
The technical solutions provided by the embodiments of the present application are described in detail below with reference to the accompanying drawings.
Fig. 1 is a schematic diagram of a power plant cogeneration system according to an embodiment of the present application. Referring to fig. 1, in an embodiment of the present application, a power plant cogeneration system 100 may include: a main turbine intermediate pressure cylinder 110, a main turbine low pressure cylinder 115, a condenser 120, a back pressure turbine 125, an absorption heat pump/chiller 130, and a heat exchange device 135.
The main turbine intermediate pressure cylinder 110 may include a first inlet 1101 and a first outlet 1102. Main turbine low pressure cylinder 115 may include a second inlet 1151 and a second outlet 1152. The condenser 120 may include a steam inlet 1201, a condensate outlet 1202, a cooling water inlet 1203, and a cooling water outlet 1204. The back pressure turbine 125 may include a third inlet 1251 and a third outlet 1252. The absorption heat pump/chiller 130 can include a heating steam inlet 1301, a heating steam outlet 1302, a first medium inlet 1303, a first medium outlet 1304, a second medium inlet 1305, and a second medium outlet 1306.
The first outlet 1102 may be connected to the second inlet 1151 and the third inlet 1251, respectively, the second outlet 1152 may be connected to the steam inlet 1201, the cooling water inlet 1203 may be connected to the second medium outlet 1306, the cooling water outlet 1204 may be connected to the second medium inlet 1305, the third outlet 1252 may be connected to the heating steam inlet 1301, and the first medium outlet 1304 may be connected to the first medium inlet 1303 via the heat exchange device 135.
In this way, in the embodiment of the present application, the back pressure turbine 125 can be used to reduce the pressure and enthalpy of the heating steam of the absorption heat pump/refrigerator 130, and the energy cascade utilization can be realized, so that the problem of energy loss caused by the heating using the cylinder discharge of the main turbine can be improved.
Fig. 2 is a schematic diagram of another power plant cogeneration system provided in an embodiment of the present application. Referring to fig. 2, on the basis of any one of the power plant cogeneration systems 100 provided in the embodiments of the present application, the power plant cogeneration system 100 may further include: the first valve 1451, the first outlet 1102 may be connected to the third inlet 1251 via the first valve 1451. In this way, the first valve 1451 can be used to adjust the steam flow distribution ratio of the main turbine low pressure cylinder 115 and the back pressure turbine 125.
Referring to fig. 2, on the basis of any one of the power plant cogeneration systems 100 provided in the embodiments of the present application, the power plant cogeneration system 100 may further include: a heater 140. The back pressure turbine 125 may also include a fourth outlet 1253. The heater 140 may include a fourth inlet 1401, a fifth outlet 1402, a third medium inlet 1403, and a third medium outlet 1404. Wherein the fourth outlet 1253 may be connected with the fourth inlet 1401, the first medium outlet 1304 may be connected with the third medium inlet 1403, and the third medium outlet 1404 may be connected with the first medium inlet 1303 via the heat exchanging device 135. In this way, the heat-supplying medium from the first medium outlet 1304 can be further heated by a portion of the exhaust steam from the back pressure turbine 125.
Referring to fig. 2, optionally, in an embodiment of the present application, the power plant cogeneration system 100 may further include: a second valve 1452. The fourth outlet 1253 may be connected to the fourth inlet 1401 via a second valve 1452. In this way, the flow distribution ratio of the third outlet 1252 and the fourth outlet 1253 can be adjusted using the second valve 1452.
Referring to fig. 2, optionally, in an embodiment of the present application, the power plant cogeneration system 100 may further include: the transfer pump 150 and the first medium outlet 1304 are connected to the first medium inlet 1303 via the heat exchanger 135 and the transfer pump 150, respectively. For example, in embodiments of the present application, the transfer pump 150 may be a circulation pump. Of course, in the embodiment of the present application, the delivery pump 150 may also be a pump-like element with other operation modes, which are not listed here.
Referring to fig. 2, optionally, in an embodiment of the present application, the power plant cogeneration system 100 may further include: first generator 1551, main turbine low pressure cylinder 115 may have a first power take off shaft (not labeled) that may be coupled to first generator 1551. In this way, the first generator 1551 can be driven by the power of the first power output shaft of the main turbine low pressure cylinder 115 to generate power.
Referring to fig. 2, optionally, in an embodiment of the present application, the power plant cogeneration system 100 may further include: the second generator 1552 and the back pressure turbine 125 may have a second power take off shaft (not labeled) that may be coupled to the second generator 1552. In this way, the power on the second power output shaft of the back pressure turbine 125 can be used to drive the second generator 1552 to operate and generate power.
Referring to fig. 2, on the basis of any one of the power plant cogeneration systems 100 provided in the embodiments of the present application, the power plant cogeneration system 100 may further include: the third valve 1453, the cooling water outlet 1204 may be connected to the second medium inlet 1305 through the third valve 1453.
Fig. 3 is a schematic diagram of another power plant cogeneration system provided in an embodiment of the present application. Referring to fig. 3, in addition to any one of the power plant co-supply systems 100 provided by the embodiments of the present application and including the third valve 1453, the power plant co-supply system 100 may further include: a cooling tower 160, a fourth valve 1454, and a fifth valve 1455. The cooling tower 160 may include a fifth inlet 1601 and a sixth outlet 1602, the cooling water outlet 1204 may be further connected to the fifth inlet 1601 via a fourth valve 1454, the second medium inlet 1305 may be connected to the fifth inlet 1601 via a third valve 1453 and a fourth valve 1454, respectively, and the sixth outlet 1602 may be connected to the second medium outlet 1306 and the cooling water inlet 1203 via a fifth valve 1455, respectively.
Thus, in embodiments of the present application, during a heating period, the main turbine may be operated at high back pressure, the fourth and fifth valves 1454, 1455 may be closed, and the third valve 1453 may be opened, such that the cooling tower 160 may be deactivated and the absorption heat pump/chiller 130 may be operated in heat pump mode. The cooling water having absorbed heat from the condenser 120 may enter the absorption heat pump/refrigerator 130 through the third valve 1453, and then, the cooling water returns to the condenser 120 after releasing heat and reducing temperature. During the cooling period, the main turbine may be operated at normal back pressure (often summer back pressure), the third valve 1453, the fourth valve 1454, and the fifth valve 1455 may be opened, the cooling tower 160 may be activated, and the absorption heat pump/chiller 130 may be operated in chiller mode. The cold circulating water from the cooling tower 160 can be divided into two paths after passing through the fifth valve 1455, one path enters the condenser 120, and the other path enters the absorption heat pump/refrigerator 130 to join with the cooling water from the condenser 120, which absorbs heat, and then enters the cooling tower 160.
Further, in the embodiment of the present application, the main turbine intermediate pressure cylinder 110 includes a first inlet connectable to a turbine high pressure cylinder or a boiler reheater, so that the main turbine intermediate pressure cylinder 110 can be supplied with steam by using the turbine high pressure cylinder or the boiler reheater. The condenser 120 includes a condensate outlet 1202 that is connectable to the regenerative feedwater heating system such that the condensate produced by the condenser 120 is delivered to the regenerative feedwater heating system. The absorption heat pump/chiller 130 includes a heating steam outlet 1302 that can be connected to a water trap system or a water replenishment system. The heater 140 may include a fifth outlet 1402 that may be connected to a hydrophobic system or a water refill system. It should be noted that the connection manner described herein is an example, and those skilled in the art may adopt other connection schemes according to actual requirements, and the description herein is not made.
In this way, in the embodiment of the present application, the back pressure turbine 125 can be used to reduce the pressure and enthalpy of the heating steam of the absorption heat pump/refrigerator 130, and the energy cascade utilization can be realized, so that the problem of energy loss caused by the heating using the cylinder discharge of the main turbine can be improved.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Although embodiments of the present application have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the embodiments of the application, the scope of which is defined in the appended claims and their equivalents.
Claims (10)
1. A power plant cogeneration system, said power plant cogeneration system comprising: a main turbine intermediate pressure cylinder (110), a main turbine low pressure cylinder (115), a condenser (120), a backpressure turbine (125), an absorption heat pump/refrigerator (130) and a heat exchange device (135);
the main turbine intermediate pressure cylinder (110) comprises a first inlet (1101) and a first outlet (1102), the main turbine low pressure cylinder (115) comprises a second inlet (1151) and a second outlet (1152), the condenser (120) comprises a steam inlet (1201), a condensed water outlet (1202), a cooling water inlet (1203) and a cooling water outlet (1204), the back pressure turbine (125) comprises a third inlet (1251) and a third outlet (1252), and the heat pump/refrigerator (130) comprises a heating steam inlet (1301), a heating steam outlet (1302), a first medium inlet (1303), a first medium outlet (1304), a second medium inlet (1305) and a second medium outlet (1306);
the first outlet (1102) is connected to the second inlet (1151) and the third inlet (1251), respectively, the second outlet (1152) is connected to the steam inlet (1201), the cooling water inlet (1203) is connected to the second medium outlet (1306), the cooling water outlet (1204) is connected to the second medium inlet (1305), the third outlet (1252) is connected to the heating steam inlet (1301), and the first medium outlet (1304) is connected to the first medium inlet (1303) via the heat exchanger (135).
2. A power plant cogeneration system according to claim 1, further comprising: a first valve (1451), the first outlet (1102) being connected to the third inlet (1251) via the first valve (1451).
3. A power plant cogeneration system according to claim 1, further comprising: a heater (140), the back pressure turbine (125) further comprising a fourth outlet (1253), the heater (140) comprising a fourth inlet (1401), a fifth outlet (1402), a third medium inlet (1403) and a third medium outlet (1404), the fourth outlet (1253) being connected to the fourth inlet (1401), the first medium outlet (1304) being connected to the third medium inlet (1403), the third medium outlet (1404) being connected to the first medium inlet (1303) via the heat exchanging means (135).
4. A power plant cogeneration system according to claim 3, further comprising: a second valve (1452), the fourth outlet (1253) being connected to the fourth inlet (1401) via the second valve (1452).
5. A power plant cogeneration system according to claim 1, further comprising: a delivery pump (150), said first medium outlet (1304) being connected to said first medium inlet (1303) via said heat exchange means (135) and said delivery pump (150), respectively.
6. A power plant cogeneration system according to claim 5, wherein said transfer pump (150) is a circulation pump.
7. A power plant cogeneration system according to claim 1, further comprising: a first generator (1551), the main turbine low pressure cylinder (115) having a first power take off shaft, the first power take off shaft being connected to the first generator (1551).
8. A power plant cogeneration system according to claim 1, further comprising: a second generator (1552), the backpressure turbine (125) having a second power take off shaft, the second power take off shaft being connected to the second generator (1552).
9. A power plant cogeneration system according to claim 1, further comprising: a third valve (1453), and the cooling water outlet (1204) is connected to the second medium inlet (1305) via the third valve (1453).
10. A power plant cogeneration system according to claim 9, further comprising: a cooling tower (160), a fourth valve (1454) and a fifth valve (1455), the cooling tower (160) comprising a fifth inlet (1601) and a sixth outlet (1602), the cooling water outlet (1204) being further connected to the fifth inlet (1601) via the fourth valve (1454), the second medium inlet (1305) being connected to the fifth inlet (1601) via the third valve (1453) and the fourth valve (1454), respectively, and the sixth outlet (1602) being connected to the second medium outlet (1306) and the cooling water inlet (1203), respectively, via the fifth valve (1455).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121629227.4U CN216240840U (en) | 2021-07-16 | 2021-07-16 | Power plant combined supply system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121629227.4U CN216240840U (en) | 2021-07-16 | 2021-07-16 | Power plant combined supply system |
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| CN216240840U true CN216240840U (en) | 2022-04-08 |
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| CN202121629227.4U Active CN216240840U (en) | 2021-07-16 | 2021-07-16 | Power plant combined supply system |
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| CN (1) | CN216240840U (en) |
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- 2021-07-16 CN CN202121629227.4U patent/CN216240840U/en active Active
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