CN218467677U - Coal-fired power generation system of coupling steam heat-retaining - Google Patents
Coal-fired power generation system of coupling steam heat-retaining Download PDFInfo
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- CN218467677U CN218467677U CN202222971980.2U CN202222971980U CN218467677U CN 218467677 U CN218467677 U CN 218467677U CN 202222971980 U CN202222971980 U CN 202222971980U CN 218467677 U CN218467677 U CN 218467677U
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Abstract
The utility model relates to a power generation technology field, concretely relates to coal-fired power generation system of coupling steam heat-retaining, include: the system comprises a boiler, a turbine high-pressure cylinder, a turbine intermediate-pressure cylinder, a turbine low-pressure cylinder, a condenser, a condensate pump and a low-pressure heater which are connected in sequence; the cold heat storage medium tank, the cold heat storage medium pump, the heat storage medium heater, the heat storage medium tank, the heat storage medium pump and the heat exchanger are connected in sequence; the steam inlet end of the heat storage medium heater is connected with the second-stage steam extraction end of the steam turbine intermediate pressure cylinder; the water inlet end of the heat exchanger is connected between the condensate pump and the low-pressure heater; the steam extraction end of the low-pressure cylinder of the steam turbine is connected with the steam outlet end of the heat exchanger and the steam inlet end of the low-pressure heater; this application utilizes the energy of storing the heat-retaining medium in the heat-retaining medium jar, releases the feedwater through the heat exchanger, and the heating of will supplying water is steam, carries to the steam turbine low pressure jar end of bleeding, reduces the steam extraction capacity of steam turbine low pressure jar relatively, improves the acting capacity of steam turbine low pressure jar, satisfies the variable load rate requirement.
Description
Technical Field
The utility model relates to a power generation technology field, concretely relates to coal-fired power generation system of coupling steam heat-retaining.
Background
With the further increase of installed capacity of renewable energy sources, the installed proportion and the generated energy proportion of coal-fired power generation are reduced year by year, the position of the coal-fired power generation in the power production is changed from main energy sources to basic energy sources, peak regulation service is provided for new energy consumption, and the safe and stable operation of a power grid is ensured. When the power grid requires rapid and large-scale load change, the coal-fired power generation system is limited by the internal heat storage capacity, and the load change rate requirement is difficult to meet.
SUMMERY OF THE UTILITY MODEL
Therefore, the to-be-solved technical problem of the utility model lies in overcoming present coal-fired power generation system and being difficult to satisfy the defect that becomes the load rate requirement, and based on above circumstances, it is very necessary to develop a coal-fired power generation system who satisfies the coupling steam heat-retaining that becomes the load rate requirement.
In order to achieve the above object, the utility model provides a coal-fired power generation system of coupling steam heat-retaining, include:
the system comprises a boiler, a turbine high-pressure cylinder, a turbine intermediate-pressure cylinder, a turbine low-pressure cylinder, a condenser, a condensate pump and a low-pressure heater which are connected in sequence;
the cold heat storage medium tank, the cold heat storage medium pump, the heat storage medium heater, the heat storage medium tank, the heat storage medium pump and the heat exchanger are connected in sequence;
the steam inlet end of the heat storage medium heater is connected with the second-stage steam extraction end of the steam turbine intermediate pressure cylinder; the water inlet end of the heat exchanger is connected between the condensate pump and the low-pressure heater through a bypass regulating valve; the steam extraction end of the steam turbine low-pressure cylinder is connected with the steam outlet end of the heat exchanger and the steam inlet end of the low-pressure heater; the steam turbine high pressure cylinder, the steam turbine intermediate pressure cylinder and the steam turbine low pressure cylinder are respectively connected with the three generators; and heat storage media are arranged in the cold heat storage medium tank and the hot heat storage medium tank.
Optionally, a deaerator, a feed water pump and a high-pressure heater connected in sequence are further arranged between the water outlet of the low-pressure heater and the feed water inlet of the boiler.
Optionally, the outlet steam of the high-pressure turbine cylinder is reheated by a boiler and then is communicated with the steam inlet of the intermediate-pressure turbine cylinder.
Optionally, the water outlet end of the heat exchanger is connected with the water inlet end of the deaerator.
Optionally, the method further comprises:
and the water feeding pump turbine is connected with the water feeding pump, and the steam inlet end of the water feeding pump turbine is connected with the steam outlet end of the heat storage medium heater.
Optionally, a steam outlet end of the feed water pump turbine is connected with a steam inlet end of the condenser.
Optionally, a cold heat storage medium tank outlet regulating valve is arranged between the cold heat storage medium tank and the cold heat storage medium pump; and a heat storage and heat storage medium tank outlet regulating valve is arranged between the heat storage and heat storage medium tank and the heat storage and heat storage medium pump.
Optionally, a steam inlet regulating valve is arranged between the steam extraction end of the steam turbine low-pressure cylinder and the steam outlet end of the heat exchanger; and a water supply regulating valve is arranged between the water outlet end of the heat exchanger and the water inlet end of the deaerator.
Optionally, the deaerator is connected with a second-stage steam extraction end of the steam turbine intermediate pressure cylinder, and the high-pressure heater is connected with both a steam extraction end of the steam turbine high pressure cylinder and a first-stage steam extraction end of the steam turbine intermediate pressure cylinder.
Optionally, a low-pressure cylinder steam extraction regulating valve is arranged at the steam extraction end of the steam turbine low-pressure cylinder.
Compared with the prior art, the technical scheme of the utility model have following advantage:
1. the utility model provides a coal-fired power generation system of coupling steam heat-retaining, include: the system comprises a boiler, a turbine high-pressure cylinder, a turbine intermediate-pressure cylinder, a turbine low-pressure cylinder, a condenser, a condensate pump and a low-pressure heater which are connected in sequence; the cold heat storage medium tank, the cold heat storage medium pump, the heat storage medium heater, the heat storage medium tank, the heat storage medium pump and the heat exchanger are connected in sequence; the steam inlet end of the heat storage medium heater is connected with the second-stage steam extraction end of the steam turbine intermediate pressure cylinder; the water inlet end of the heat exchanger is connected between the condensate pump and the low-pressure heater through a bypass regulating valve; the steam extraction end of the low-pressure cylinder of the steam turbine is connected with the steam outlet end of the heat exchanger and the steam inlet end of the low-pressure heater; the steam turbine high-pressure cylinder, the steam turbine medium-pressure cylinder and the steam turbine low-pressure cylinder are respectively connected with the three generators; heat storage media are arranged in the cold heat storage medium tank and the hot heat storage medium tank; by adopting the technical scheme, the energy of the heat storage medium stored in the heat storage medium tank is released into the feed water through the heat exchanger, the feed water is heated into steam and is conveyed to the steam extraction end of the low-pressure cylinder of the steam turbine, the steam extraction amount of the low-pressure cylinder of the steam turbine is relatively reduced, the work capacity of the low-pressure cylinder of the steam turbine is improved, and the requirement of variable load rate is met; and need not to carry out transformation to coal burner group self, only need externally add heat-retaining medium heater etc. from the transformation degree, this technical scheme is implemented more easily, reforms transform with low costsly.
2. The utility model is also provided with a deaerator, a water feeding pump and a high pressure heater which are connected in sequence between the water outlet of the low pressure heater and the water feeding inlet of the boiler; this application adopts above-mentioned technical scheme, through the steam condensation after utilizing steam turbine low pressure jar, forms the comdenstion water, again through heating, deoxidization after, circulate to the boiler in, in addition cyclic utilization, the water economy resource, reduce cost.
3. The outlet steam of the high-pressure cylinder of the steam turbine is reheated by the boiler and then is communicated with the steam inlet of the intermediate-pressure cylinder of the steam turbine; this application adopts above-mentioned technical scheme, through with the steam of steam turbine high pressure cylinder steam outlet through the boiler after the reheating, the steam inlet of rethread steam turbine intermediate pressure jar, and then improves the steam temperature of steam turbine intermediate pressure jar, improves the acting capacity of steam turbine intermediate pressure jar.
4. The water outlet end of the heat exchanger of the utility model is connected with the water inlet end of the deaerator; this application adopts above-mentioned technical scheme, returns the water that does not form steam in the heat exchanger to the oxygen-eliminating device again in, cyclic utilization, water economy resource.
5. The utility model provides a coal-fired power generation system of coupling steam heat-retaining still includes: the water feeding pump turbine is connected with the water feeding pump, and the steam inlet end of the water feeding pump turbine is connected with the steam outlet end of the heat storage medium heater; this application adopts above-mentioned technical scheme, utilizes the steam of heat-retaining medium heater through the step, promotes the feed pump steam turbine, drives the operation of feed pump, the energy saving.
6. The steam outlet end of the water-feeding pump steam turbine of the utility model is connected with the steam inlet end of the condenser; this application adopts above-mentioned technical scheme, and the steam after make full use of water-feeding pump steam turbine utilizes forms the condensate water, cyclic utilization, water economy resource.
7. The utility model is provided with a cold heat storage medium tank outlet regulating valve between the cold heat storage medium tank and the cold heat storage medium pump; a heat storage and heat transfer medium tank outlet regulating valve is arranged between the heat storage and heat transfer medium tank and the heat storage and heat transfer medium pump; by adopting the technical scheme, the quantity of the heat storage medium conveyed into the heat storage medium heater from the cold heat storage medium tank can be conveniently adjusted through the outlet adjusting valve of the cold heat storage medium tank; the quantity of the heat storage medium conveyed to the heat storage medium tank by the heat storage medium heater can be conveniently adjusted through the outlet adjusting valve of the heat storage medium tank.
8. The utility model is provided with a steam inlet regulating valve between the steam extraction end of the low pressure cylinder of the steam turbine and the steam outlet end of the heat exchanger; a water supply regulating valve is arranged between the water outlet end of the heat exchanger and the water inlet end of the deaerator; by adopting the technical scheme, the steam extraction amount conveyed from the heat exchanger to the low-pressure heater can be conveniently adjusted through the steam inlet adjusting valve; the water supply quantity conveyed to the deaerator from the heat exchanger is conveniently adjusted through the water supply adjusting valve.
9. The deaerator of the utility model is connected with the second stage steam extraction end of the turbine intermediate pressure cylinder, and the high pressure heater is connected with the steam extraction end of the turbine high pressure cylinder and the first stage steam extraction end of the turbine intermediate pressure cylinder; this application adopts above-mentioned technical scheme, utilizes the steam extraction heating feedwater of steam turbine high pressure cylinder and steam turbine intermediate pressure cylinder.
10. The steam extraction end of the low pressure cylinder of the steam turbine is provided with a low pressure cylinder steam extraction regulating valve; this application adopts above-mentioned technical scheme, conveniently adjusts the extraction steam volume of steam turbine low pressure jar through low pressure jar extraction governing valve.
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 embodiments or the technical solutions in the prior art will be briefly described below, and it is obvious that the drawings in the following description are 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.
Fig. 1 is a schematic connection structure diagram of a coal-fired power generation system coupled with steam heat storage according to an embodiment of the present invention.
Description of reference numerals:
1. a boiler; 2. a high-pressure cylinder of the steam turbine; 3. a turbine intermediate pressure cylinder; 4. a low-pressure cylinder of the steam turbine; 5. a condenser; 6. a condensate pump; 7. the low pressure cylinder steam extraction regulating valve; 8. a low-pressure heater; 9. a deaerator; 10. a feed pump; 11. a feed pump turbine; 12. a high pressure heater; 13. a cold heat storage medium tank; 14. an outlet regulating valve of the cold heat storage medium tank; 15. a cold heat storage medium pump; 16. a heat storage medium heater; 17. a thermal heat storage medium tank; 18. an outlet regulating valve of the heat storage and heat transfer medium tank; 19. a thermal heat storage medium pump; 20. a heat exchanger; 21. a bypass regulating valve; 22. a steam inlet regulating valve; 23. a feed water regulating valve.
Detailed Description
The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts all belong to the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element 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 invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; 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 invention can be understood in specific cases to those skilled in the art.
Furthermore, the technical features mentioned in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.
One embodiment of a coal-fired power generation system coupled with steam heat storage as shown in fig. 1, comprises: the system comprises a boiler 1, a turbine high-pressure cylinder 2, a turbine intermediate-pressure cylinder 3, a turbine low-pressure cylinder 4, a condenser 5, a condensate pump 6, a low-pressure heater 8, a deaerator 9, a water feed pump 10 and a high-pressure heater 12 which are connected in sequence, a cold heat storage medium tank 13, a cold heat storage medium tank outlet regulating valve 14, a cold heat storage medium pump 15, a heat storage medium heater 16, a heat storage medium tank 17, a heat storage medium tank outlet regulating valve 18, a heat storage medium pump 19 and a heat exchanger 20 which are connected in sequence, and a water feed pump turbine 11 connected with the water feed pump 10; specifically, the boiler 1 is a coal-fired boiler.
The steam inlet end of the heat storage medium heater 16 is connected with the second-stage steam extraction end of the steam turbine intermediate pressure cylinder 3; the water inlet end of the heat exchanger 20 is connected between the condensate pump 6 and the low-pressure heater 8 through a bypass regulating valve 21; the steam extraction end of the steam turbine low pressure cylinder 4 is connected with the steam outlet end of the heat exchanger 20 and the steam inlet end of the low pressure heater 8; the steam turbine high-pressure cylinder 2, the steam turbine intermediate-pressure cylinder 3 and the steam turbine low-pressure cylinder 4 are respectively connected with three generators; heat storage media are arranged in the cold heat storage medium tank 13 and the hot heat storage medium tank 17; specifically, the heat storage medium is a flowing medium such as molten salt or heat transfer oil. And the outlet steam of the high-pressure turbine cylinder 2 is reheated by the boiler 1 and then is communicated with the steam inlet of the intermediate-pressure turbine cylinder 3. And the water outlet end of the heat exchanger 20 is connected with the water inlet end of the deaerator 9. The steam inlet end of the water feeding pump turbine 11 is connected with the steam outlet end of the heat storage medium heater 16; specifically, the steam temperature of the steam inlet of the heat storage medium heater 16 is more than 300 ℃; preferably, the steam temperature of the steam inlet of the heat storage medium heater 16 is 350-450 ℃, so that when the heat storage medium is heat conduction oil, the working temperature range of the heat conduction oil is matched. And the steam outlet end of the feed water pump turbine 11 is connected with the steam inlet end of the condenser 5. A steam inlet adjusting valve 22 is arranged between the steam extraction end of the steam turbine low-pressure cylinder 4 and the steam outlet end of the heat exchanger 20; and a water supply regulating valve 23 is arranged between the water outlet end of the heat exchanger 20 and the water inlet end of the deaerator 9. The deaerator 9 is connected with a second-stage steam extraction end of the steam turbine intermediate pressure cylinder 3, and the high-pressure heater 12 is connected with a steam extraction end of the steam turbine high pressure cylinder 2 and a first-stage steam extraction end of the steam turbine intermediate pressure cylinder 3. And a low-pressure cylinder steam extraction regulating valve 7 is arranged at the steam extraction end of the steam turbine low-pressure cylinder 4.
The working principle and process of the coal-fired power generation system for coupling the steam heat storage are briefly described as follows: the steam of the boiler 1 is conveyed to a steam turbine high-pressure cylinder 2, the steam used by the steam turbine high-pressure cylinder 2 enters the boiler 1 for reheating to form reheated steam, and the reheated steam is input into a steam turbine intermediate-pressure cylinder 3; the steam used by the steam turbine intermediate pressure cylinder 3 is input into the steam turbine low pressure cylinder 4; the steam used by the steam turbine low pressure cylinder 4 enters a condenser 5 and is condensed into condensed water; the condensed water is input into a low-pressure heater 8, and the low-pressure heater 8 heats the condensed water by using the extracted steam of the low-pressure cylinder 4 of the steam turbine to form primary preheated water; the preliminarily preheated water flows into a deaerator 9, and the deaerator 9 removes oxygen by using the steam extraction of the steam turbine intermediate pressure cylinder 3; the water without oxygen is sent into a high pressure heater 12, and the high pressure heater 12 heats water by using the extracted steam of the steam turbine intermediate pressure cylinder 3 and the steam turbine high pressure cylinder 2; the heated water is fed into the boiler 1 for recycling. Steam of the steam turbine intermediate pressure cylinder 3 is input into a heat storage medium heater 16 to heat the heat storage medium, and the heated heat storage medium is conveyed into a heat storage medium tank 17 to be stored; the heat stored in the heat storage medium tank 17 is released into the feed water through the heat exchanger 20, the feed water is heated into steam, and the steam is conveyed to the steam extraction end of the steam turbine low pressure cylinder 4, so that the steam extraction amount of the steam turbine low pressure cylinder 4 is relatively reduced, the work capacity of the steam turbine low pressure cylinder is improved, and the requirement of variable load rate is met.
It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious changes and modifications can be made without departing from the scope of the invention.
Claims (10)
1. A coal-fired power generation system coupling steam heat storage, comprising:
the system comprises a boiler (1), a turbine high-pressure cylinder (2), a turbine intermediate-pressure cylinder (3), a turbine low-pressure cylinder (4), a condenser (5), a condensate pump (6) and a low-pressure heater (8) which are connected in sequence;
a cold heat storage medium tank (13), a cold heat storage medium pump (15), a heat storage medium heater (16), a heat storage medium tank (17), a heat storage medium pump (19) and a heat exchanger (20) which are connected in sequence;
the steam inlet end of the heat storage medium heater (16) is connected with the second-stage steam extraction end of the steam turbine intermediate pressure cylinder (3); the water inlet end of the heat exchanger (20) is connected between the condensate pump (6) and the low-pressure heater (8) through a bypass regulating valve (21); the steam extraction end of the steam turbine low-pressure cylinder (4) is connected with the steam outlet end of the heat exchanger (20) and the steam inlet end of the low-pressure heater (8); the steam turbine high-pressure cylinder (2), the steam turbine intermediate-pressure cylinder (3) and the steam turbine low-pressure cylinder (4) are respectively connected with the three generators; and heat storage media are respectively arranged in the cold heat storage medium tank (13) and the hot heat storage medium tank (17).
2. The coal-fired power generation system with heat storage by coupling steam as claimed in claim 1, characterized in that a deaerator (9), a feed water pump (10) and a high pressure heater (12) which are connected in sequence are further arranged between the water outlet of the low pressure heater (8) and the feed water inlet of the boiler (1).
3. The coal-fired power generation system with coupled steam heat storage as claimed in claim 2, characterized in that the steam at the outlet of the high-pressure turbine cylinder (2) is reheated by the boiler (1) and then communicated with the steam inlet of the medium-pressure turbine cylinder (3).
4. The coal-fired power generation system with coupled steam heat storage according to claim 2, characterized in that the water outlet end of the heat exchanger (20) is connected with the water inlet end of the deaerator (9).
5. A coal-fired power generation system with heat stored coupled steam as in any of claims 2-4 further comprising:
and the water feeding pump turbine (11) is connected with the water feeding pump (10), and the steam inlet end of the water feeding pump turbine (11) is connected with the steam outlet end of the heat storage medium heater (16).
6. The coal-fired power generation system with heat storage by coupling steam as claimed in claim 5, characterized in that the steam outlet end of the feedwater pump turbine (11) is connected with the steam inlet end of the condenser (5).
7. The coal-fired power generation system with heat storage by coupling steam of any of claims 1 to 4, characterized in that a cold heat storage medium tank outlet regulating valve (14) is provided between the cold heat storage medium tank (13) and the cold heat storage medium pump (15); an outlet regulating valve (18) of the heat storage and heat storage medium tank is arranged between the heat storage and heat storage medium tank (17) and the heat storage and heat storage medium pump (19).
8. The coal-fired power generation system with coupled steam heat storage according to claim 4, characterized in that a steam inlet regulating valve (22) is arranged between the steam extraction end of the steam turbine low pressure cylinder (4) and the steam outlet end of the heat exchanger (20); a water supply regulating valve (23) is arranged between the water outlet end of the heat exchanger (20) and the water inlet end of the deaerator (9).
9. A coal-fired power generation system with coupled steam heat storage according to any of claims 2 to 4,
the deaerator (9) is connected with a second-stage steam extraction end of the steam turbine intermediate pressure cylinder (3), and the high-pressure heater (12) is connected with a steam extraction end of the steam turbine high pressure cylinder (2) and a first-stage steam extraction end of the steam turbine intermediate pressure cylinder (3).
10. The coal-fired power generation system with coupled steam heat storage according to any one of claims 1 to 4, characterized in that a low-pressure cylinder steam extraction regulating valve (7) is provided at the steam extraction end of the steam turbine low-pressure cylinder (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222971980.2U CN218467677U (en) | 2022-11-08 | 2022-11-08 | Coal-fired power generation system of coupling steam heat-retaining |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222971980.2U CN218467677U (en) | 2022-11-08 | 2022-11-08 | Coal-fired power generation system of coupling steam heat-retaining |
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| Publication Number | Publication Date |
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| CN218467677U true CN218467677U (en) | 2023-02-10 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202222971980.2U Active CN218467677U (en) | 2022-11-08 | 2022-11-08 | Coal-fired power generation system of coupling steam heat-retaining |
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| CN (1) | CN218467677U (en) |
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- 2022-11-08 CN CN202222971980.2U patent/CN218467677U/en active Active
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