CN111878949A - Low-pressure-cylinder few-steam heating system and method capable of achieving annual operation - Google Patents
Low-pressure-cylinder few-steam heating system and method capable of achieving annual operation Download PDFInfo
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- CN111878949A CN111878949A CN202010888453.8A CN202010888453A CN111878949A CN 111878949 A CN111878949 A CN 111878949A CN 202010888453 A CN202010888453 A CN 202010888453A CN 111878949 A CN111878949 A CN 111878949A
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- 238000010438 heat treatment Methods 0.000 title claims abstract description 71
- 238000000034 method Methods 0.000 title claims abstract description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 150
- 230000005611 electricity Effects 0.000 claims abstract description 5
- 238000001816 cooling Methods 0.000 claims description 11
- 230000005494 condensation Effects 0.000 claims description 7
- 238000009833 condensation Methods 0.000 claims description 7
- 230000017525 heat dissipation Effects 0.000 claims description 4
- 238000007664 blowing Methods 0.000 claims description 2
- 230000007774 longterm Effects 0.000 abstract 1
- 230000033228 biological regulation Effects 0.000 description 3
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005485 electric heating Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F5/00—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater
- F24F5/0003—Exclusively-fluid systems
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D15/00—Adaptations of machines or engines for special use; Combinations of engines with devices driven thereby
- F01D15/10—Adaptations for driving, or combinations with, electric generators
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
- F24F11/83—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers
- F24F11/84—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers using valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/89—Arrangement or mounting of control or safety devices
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
- F24F13/30—Arrangement or mounting of heat-exchangers
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- Control Of Steam Boilers And Waste-Gas Boilers (AREA)
Abstract
The invention discloses a low-pressure cylinder less-steam heating system and a method capable of realizing annual operation, wherein the low-pressure cylinder less-steam heating system comprises a boiler, a high-pressure cylinder, a medium-pressure cylinder and a low-pressure cylinder, and exhaust steam of the boiler enters the high-pressure cylinder to do work; returning the exhaust steam of the high-pressure cylinder to the boiler for secondary heating, and feeding the exhaust steam subjected to secondary heating into the intermediate-pressure cylinder for doing work; one part of the exhaust steam of the intermediate pressure cylinder enters the low pressure cylinder to do work, and the other part of the exhaust steam enters the heat supply network circulating water system and is used for exchanging heat to the town heat supply system in the heating season and supplying cold to the outside in the non-heating season; the exhausted steam of the low pressure cylinder heats up and boosts the system and then enters the boiler, finish the steam-water circulation; the high pressure cylinder, the intermediate pressure cylinder and the low pressure cylinder drive the generator to generate electricity together. The invention uses the steam-water heat exchanger and the hot water pipe network at the first station to supply heat in a centralized way in the heating season and supply cold in a centralized way in the non-heating season, and can realize the long-term operation of the low-pressure cylinder zero-output heat supply system all the year around.
Description
[ technical field ] A method for producing a semiconductor device
The invention belongs to the technical field of thermodynamic systems, and relates to a low-pressure cylinder less-steam heat supply system and method capable of achieving annual operation.
[ background of the invention ]
The zero-output heat supply system of the low-pressure cylinder has the advantages that the steam exhausted by the other medium-pressure cylinders is used for supplying heat to the outside except that a small amount of cooling steam enters the low-pressure cylinder to play a role in cooling blast heat dissipation, the double improvement of the heat supply capacity and the electric peak regulation capacity can be realized, the zero-output heat supply system has the advantages of high heat supply capacity and strong electric peak regulation capacity, and has wide application prospect under the background that the existing electric heating contradiction is increasingly severe, and the deep peak regulation frequency and the width of a coal-fired power generator set are increasingly.
At present, although more power plants implement zero-output heating transformation of low-pressure cylinders and obtain better effect, the method is only limited to operation in heating seasons. In non-heating seasons, due to the lack of external heat load, the low-pressure cylinder zero-output heat supply system cannot be put into operation and can only be limited, so that the system is low in utilization rate, and the advantages cannot be exerted. If reasonable users can be found to consume the steam exhausted by the medium pressure cylinder, the zero-output heating system of the low pressure cylinder can be put into operation all the year round, and the method is very favorable for realizing energy conservation and creating income for the coal-fired power plant.
[ summary of the invention ]
The invention aims to solve the problems in the prior art and provides a low-pressure-cylinder few-steam heating system and method capable of realizing annual operation. The steam-water heat exchanger, the heat supply network circulating water pump and the heating power pipe network of the initial station are shared all year round, the heat is supplied to the outside in a centralized manner in the heating season, the cold is supplied in a centralized manner in the non-heating season, and the zero-output heat supply system of the low-pressure cylinder is put into operation all year round. In the heating season of residents, middle-exhaust steam enters a steam-water heat exchanger at a first station to heat circulating water of a heat supply network, and hot water is conveyed to each heat exchange unit in cities and towns through a pipe network to realize centralized heat supply; in non-heating seasons, the middle-exhaust steam enters the steam-water heat exchanger at the initial station to heat the circulating water of the heat supply network, and the hot water is conveyed to each hot water refrigerating unit in cities and towns through the network to realize concentrated cooling.
In order to achieve the purpose, the invention adopts the following technical scheme to realize the purpose:
a low-pressure cylinder few-steam heating system capable of achieving annual commissioning comprises:
the new steam of the boiler enters a high-pressure cylinder to do work;
the exhaust steam of the high-pressure cylinder returns to the boiler for secondary heating, and the steam after secondary heating enters the intermediate-pressure cylinder for doing work;
one part of the exhaust steam of the intermediate pressure cylinder enters the low pressure cylinder to do work, and the other part of the exhaust steam enters the heat supply network circulating water system and is used for supplying heat to the town heat supply system in the heating season and supplying cold to the outside in the non-heating season;
the low-pressure cylinder is used for exhausting steam, condensing the steam, then heating and boosting the pressure of the system, and then feeding the steam into the boiler to complete steam-water circulation; the high pressure cylinder, the intermediate pressure cylinder and the low pressure cylinder drive the generator to generate electricity together.
The invention further improves the following steps:
the temperature and pressure raising system after exhaust steam condensation comprises a condenser, a condensate pump, a low-pressure heater group, a water feeding pump and a high-pressure heater group which are connected in sequence; the inlet of the condenser is connected with the exhaust steam of the low pressure cylinder, and the outlet of the high pressure heater group is connected with the boiler.
The heat supply network circulating water system comprises a steam-water heat exchanger, the other part of the exhaust steam of the intermediate pressure cylinder enters the steam inlet side of the steam-water heat exchanger and is used for heating heat supply network circulating water, the heat supply network circulating water at the water outlet of the steam-water heat exchanger is output to the inlet of the heating heat exchanger and the inlet of the hot water type refrigerator through a heat supply network circulating water pump, and the heat supply network circulating water at the outlet of the heating heat exchanger and the outlet of the hot water type refrigerator is converged and then is conveyed to the water inlet of the steam-; the heating heat exchanger is used for supplying heat to a heating system, and the hot water type refrigerator is used for supplying cold to a cooling system.
The exhaust steam of the intermediate pressure cylinder is divided into three paths, the first path is connected with the steam inlet of the low pressure cylinder through a first valve group, the second path is connected with the steam inlet of the low pressure cylinder through a second valve group, and the third path is connected with the steam side inlet of the steam-water heat exchanger through a third valve group.
The heat supply network circulating water at the outlet of the heat supply network circulating water pump is divided into two paths, one path of the heat supply network circulating water sequentially passes through a fourth valve group, a heating heat exchanger and a fifth valve group and enters a water side inlet of the steam-water heat exchanger; and the other path of the water enters a water side inlet of the steam-water heat exchanger through a sixth valve group, a hot water type refrigerator and a seventh valve group.
A low-pressure cylinder less-steam heat supply method capable of realizing annual operation comprises the following steps:
when no external heat supply is carried out, the coal-fired generator set keeps running in a pure condensation state; the steam at the outlet of the boiler is secondarily heated in the boiler after being acted by the high-pressure cylinder, the new steam enters the middle-pressure cylinder to act, the exhaust steam enters the low-pressure cylinder, and the three cylinders jointly drive the generator to generate power; after the exhaust steam of the low-pressure cylinder enters a condenser for condensation, the exhaust steam sequentially passes through a condensate pump, a low-pressure heater group, a water feeding pump and a high-pressure heater group to realize temperature rise and pressure rise and then enters a boiler to complete steam-water circulation;
when the low-pressure cylinder supplies heat with zero output, the first valve group is closed, part of steam enters the low-pressure cylinder through the second valve group to play a role in cooling, blowing and heat dissipation, the exhaust steam of the other intermediate-pressure cylinders realizes external heat supply through the third valve group, the exhaust steam enters the steam-water heat exchanger to heat the circulating water of the heat supply network, and the condensed water of the steam returns to the condenser to maintain the quality balance of the steam-water system;
in a resident heating season, the sixth valve group and the seventh valve group are closed, the fourth valve group and the fifth valve group are opened, hot water at the outlet of the steam-water heat exchanger enters the heating heat exchanger after being pressurized by the heat supply network circulating water pump, and then carries out secondary non-contact heat exchange with the town heating system, so that external centralized heat supply is realized; the heat supply network circulating water after heat release flows back to a steam-water heat exchanger at the first station of the power plant to complete thermodynamic cycle;
in non-heating seasons, the fourth valve group and the fifth valve group are closed, the sixth valve group and the seventh valve group are opened, hot water at the outlet of the steam-water heat exchanger enters the hot water type refrigerator after being pressurized by the heat supply network circulating water pump, the cold energy is prepared to realize external centralized cooling, and the heat supply network circulating water after heat release flows back to the steam-water heat exchanger at the first station of the power plant to finish the thermal circulation.
Compared with the prior art, the invention has the following beneficial effects:
the invention provides a low-pressure cylinder less-steam heating system capable of being put into operation all the year around. In the heating season of residents, middle-exhaust steam enters a steam-water heat exchanger at a first station to heat circulating water of a heat supply network, and hot water is conveyed to each heat exchange unit in cities and towns through a pipe network to realize centralized heat supply; in non-heating seasons, the middle-exhaust steam enters the steam-water heat exchanger at the initial station to heat the circulating water of the heat supply network, and the hot water is conveyed to each hot water refrigerating unit in cities and towns through the network to realize concentrated cooling. The steam-water heat exchanger and the hot water pipe network at the initial station are utilized to realize centralized heat supply in heating seasons and centralized cold supply in non-heating seasons, so that the annual long-period operation of the low-pressure cylinder zero-output heat supply system can be realized.
[ description of the drawings ]
In order to more clearly explain the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
FIG. 1 is a schematic diagram of a thermodynamic system of the invention.
Wherein: 1-a boiler; 2-high pressure cylinder; 3-a medium pressure cylinder; 4-low pressure cylinder; 5-a generator; 6-a condenser; 7-a condensate pump; 8-low pressure heater group; 9-a water supply pump; 10-high pressure heater group; 11-steam-water heat exchanger; 12-heat supply network circulating water pump; 13-a heating heat exchanger; 14-a hot water type refrigerator; 15-a first valve group; 16-a second valve group; 17-a third valve group; 18-fourth valve group; 19-fifth valve set; 20-sixth valve group; 21-seventh valve group.
[ detailed description ] embodiments
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. 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.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the embodiments of the present invention, it should be noted that if the terms "upper", "lower", "horizontal", "inner", etc. are used for indicating the orientation or positional relationship based on the orientation or positional relationship shown in the drawings or the orientation or positional relationship which is usually arranged when the product of the present invention is used, the description is merely for convenience and simplicity, and the indication or suggestion that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, cannot be understood as limiting the present invention. Furthermore, the terms "first," "second," and the like are used merely to distinguish one description from another, and are not to be construed as indicating or implying relative importance.
Furthermore, the term "horizontal", if present, does not mean that the component is required to be absolutely horizontal, but may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.
In the description of the embodiments of the present invention, it should be further noted that unless otherwise explicitly stated or limited, the terms "disposed," "mounted," "connected," and "connected" should be interpreted 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 meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
The invention is described in further detail below with reference to the accompanying drawings:
referring to fig. 1, the low-pressure cylinder less-steam heat supply system capable of achieving annual operation comprises a boiler 1, exhaust steam of the boiler 1 enters a high-pressure cylinder 2 to do work, exhaust steam of the high-pressure cylinder 2 returns to the boiler 1 to be heated for the second time, the exhaust steam after secondary heating enters an intermediate-pressure cylinder 3 to do work, the exhaust steam of the intermediate-pressure cylinder 3 enters a low-pressure cylinder 4 to do work, the exhaust steam of the low-pressure cylinder 4 sequentially passes through a condenser 6, a condensate pump 7, a low-pressure heater group 8, a water feed pump 9 and a high-pressure heater group 10 to be heated and boosted, and then enters the boiler 1 to complete steam. The high pressure cylinder 2, the intermediate pressure cylinder 3, and the low pressure cylinder 4 drive the generator 5 to generate electricity.
The exhaust steam of the intermediate pressure cylinder 3 is divided into three paths, the first path is connected with the steam inlet of the low pressure cylinder 4 through a first valve group 15, the second path is connected with the steam inlet of the low pressure cylinder 4 through a second valve group 16, and the third path is connected with the steam side inlet of the steam-water heat exchanger 11 through a third valve group 17.
One part of the exhaust steam of the intermediate pressure cylinder 3 enters the low pressure cylinder 4, the other part of the exhaust steam enters the steam inlet side of the steam-water heat exchanger 11 and is used for heating heat supply network circulating water, the water outlet of the steam-water heat exchanger 11 is connected with a heat supply network circulating water pump 12, the outlet of the heat supply network circulating water pump 12 is respectively connected with the inlet of the heating heat exchanger 13 and the inlet of the hot water type refrigerator 14, and the heat supply network circulating water at the outlet of the heating heat exchanger 13 and the outlet of the hot water type refrigerator 14 is converged and then conveyed to the water inlet side of.
The heat supply network circulating water at the outlet of the heat supply network circulating water pump 12 is divided into two paths, one path of the heat supply network circulating water sequentially passes through a fourth valve group 18, a heating heat exchanger 13 and a fifth valve group 19 and enters the water side inlet of the steam-water heat exchanger 11; the other path of the water enters the water side inlet of the steam-water heat exchanger 11 through a sixth valve group 20, a hot water type refrigerator 14 and a seventh valve group 21.
The invention discloses a zero-output heat supply method of a low-pressure cylinder, which can realize annual operation and comprises the following steps:
when no external heat supply is carried out, the coal-fired generating set is kept running in a pure condensation state. Steam at the outlet of the boiler 1 is heated for the second time in the boiler 1 after being acted by the high-pressure cylinder 2, new steam enters the middle-pressure cylinder 3 to act, exhaust steam enters the low-pressure cylinder 4, and the three cylinders drive the generator 5 to generate power. After entering a condenser 6 for condensation, the low-pressure cylinder 4 exhausts steam, and then enters the boiler 1 after being heated and pressurized by a condensate pump 7, a low-pressure heater group 8, a feed pump 9 and a high-pressure heater group 10 in sequence, so that steam-water circulation is completed.
When the low-pressure cylinder supplies heat with zero output, the first valve group 15 is closed, except that a small part of steam enters the low-pressure cylinder 4 through the second valve group 16 to play a cooling blast heat dissipation role, the rest of the steam discharged from the middle-pressure cylinder 3 realizes external heat supply through the third valve group 17, the middle-discharged steam enters the steam-water heat exchanger 11 to heat the circulating water of the heat supply network, and the condensed water of the steam returns to the condenser to maintain the quality balance of the steam-water system.
In the resident heating season, the sixth valve group 20 and the seventh valve group 21 are closed, the fourth valve group 18 and the fifth valve group 19 are opened, hot water at the outlet of the steam-water heat exchanger 11 enters the heating heat exchanger 13 after being pressurized by the heat supply network circulating water pump 12, and then carries out secondary non-contact heat exchange with a town heating system, so that external centralized heat supply is realized. And the heat supply network circulating water after heat release flows back to the inlet of the steam-water heat exchanger 11 at the first station of the power plant to complete thermodynamic cycle.
In non-heating seasons, the fourth valve group 18 and the fifth valve group 19 are closed, the sixth valve group 20 and the seventh valve group 21 are opened, hot water at the outlet of the steam-water heat exchanger 11 enters the hot water type refrigerator 14 after being pressurized by the heat supply network circulating water pump 12, cold energy is prepared to realize external centralized cooling, and heat supply network circulating water after heat release flows back to the inlet of the steam-water heat exchanger 11 at the first station of the power plant to finish thermodynamic cycle.
The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (6)
1. The utility model provides a few steam heating system of low pressure cylinder that can realize putting into operation all the year round which characterized in that includes:
the new steam of the boiler (1) enters a high-pressure cylinder (2) to do work;
the exhaust steam of the high-pressure cylinder (2) returns to the boiler (1) for secondary heating, and the steam after secondary heating enters the intermediate-pressure cylinder (3) for acting;
one part of the exhaust steam of the intermediate pressure cylinder (3) enters the low pressure cylinder (4) to do work, and the other part of the exhaust steam enters the heat supply network circulating water system and is used for supplying heat to the town heat supply system in the heating season and supplying cold to the outside in the non-heating season;
the low-pressure cylinder (4), the exhaust steam of the low-pressure cylinder (4) is condensed, and then enters the boiler (1) after the temperature and pressure raising system is raised, so that steam-water circulation is completed; the high pressure cylinder (2), the intermediate pressure cylinder (3) and the low pressure cylinder (4) jointly drive the generator (5) to generate electricity.
2. The low-pressure-cylinder low-steam heating system capable of achieving annual operation according to claim 1, wherein the exhaust steam condensed temperature and pressure raising system comprises a condenser (6), a condensate pump (7), a low-pressure heater group (8), a water feeding pump (9) and a high-pressure heater group (10) which are connected in sequence; the inlet of the condenser (6) is connected with the exhaust steam of the low pressure cylinder (4), and the outlet of the high pressure heater group (10) is connected with the boiler (1).
3. The low-pressure-cylinder few-steam heating system capable of achieving annual operation according to claim 1, characterized in that the heat supply network circulating water system comprises a steam-water heat exchanger (11), the other part of the exhaust steam of the intermediate pressure cylinder (3) enters the steam inlet side of the steam-water heat exchanger (11) and is used for heating heat supply network circulating water, the heat supply network circulating water at the water outlet side of the steam-water heat exchanger (11) is output to the inlet of a heating heat exchanger (13) and the inlet of a hot water type refrigerator (14) through a heat supply network circulating water pump (12), and the heat supply network circulating water at the outlet of the heating heat exchanger (13) and the outlet of the hot water type refrigerator (14) is converged and then is conveyed to the water inlet side of the steam-water; the heating heat exchanger (13) is used for supplying heat to a heating system, and the hot water type refrigerator (14) is used for supplying cold to a cold supply system.
4. The low-pressure-cylinder low-steam heating system capable of achieving annual commissioning according to claim 3, wherein the steam exhaust of the intermediate pressure cylinder (3) is divided into three paths, the first path is connected with the steam inlet of the low-pressure cylinder (4) through a first valve group (15), the second path is connected with the steam inlet of the low-pressure cylinder (4) through a second valve group (16), and the third path is connected with the steam-side inlet of the steam-water heat exchanger (11) through a third valve group (17).
5. The low-pressure-cylinder few-steam heating system capable of achieving annual operation according to claim 3, wherein heat supply network circulating water at an outlet of the heat supply network circulating water pump (12) is divided into two paths, and one path of heat supply network circulating water sequentially passes through a fourth valve group (18), a heating heat exchanger (13) and a fifth valve group (19) and enters a water side inlet of the steam-water heat exchanger (11); the other path of the water enters a water side inlet of the steam-water heat exchanger (11) through a sixth valve group (20), a hot water type refrigerator (14) and a seventh valve group (21).
6. A low pressure cylinder low steam heating method capable of year round operation using the system of any one of claims 1 to 3, comprising the steps of:
when no external heat supply is carried out, the coal-fired generator set keeps running in a pure condensation state; steam at the outlet of the boiler (1) is secondarily heated in the boiler (1) after acting through the high-pressure cylinder (2), new steam enters the intermediate-pressure cylinder (3) to act, exhaust steam enters the low-pressure cylinder (4), and the three cylinders jointly drive the generator (5) to generate electricity; after exhaust steam of the low-pressure cylinder (4) enters a condenser (6) for condensation, the exhaust steam enters a boiler (1) after being heated and pressurized by a condensate pump (7), a low-pressure heater group (8), a water feed pump (9) and a high-pressure heater group (10) in sequence, and steam-water circulation is completed;
when the low-pressure cylinder supplies heat with zero output, the first valve group (15) is closed, a part of steam enters the low-pressure cylinder (4) through the second valve group (16) to play a role in cooling, blowing and heat dissipation, the exhaust steam of the rest intermediate-pressure cylinders (3) realizes external heat supply through the third valve group (17), the intermediate-exhaust steam enters the steam-water heat exchanger (11) to heat circulating water of a heat supply network, and the condensed drain water of the steam returns to the condenser to maintain the mass balance of a steam-water system;
in a resident heating season, the sixth valve group (20) and the seventh valve group (21) are closed, the fourth valve group (18) and the fifth valve group (19) are opened, hot water at the outlet of the steam-water heat exchanger (11) enters the heating heat exchanger (13) after being pressurized by the heat supply network circulating water pump (12) and then carries out secondary non-contact heat exchange with a town heating system, so that external centralized heat supply is realized; the heat supply network circulating water after heat release flows back to a steam-water heat exchanger (11) at the first station of the power plant to complete thermodynamic cycle;
in non-heating seasons, the fourth valve group (18) and the fifth valve group (19) are closed, the sixth valve group (20) and the seventh valve group (21) are opened, hot water at the outlet of the steam-water heat exchanger (11) enters the hot water type refrigerator (14) after being pressurized by the heat supply network circulating water pump (12), cold energy is prepared to realize external centralized cooling, and heat supply network circulating water after heat release flows back to the steam-water heat exchanger (11) at the first station of the power plant to complete thermal circulation.
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| CN202010888453.8A CN111878949A (en) | 2020-08-28 | 2020-08-28 | Low-pressure-cylinder few-steam heating system and method capable of achieving annual operation |
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| CN202010888453.8A CN111878949A (en) | 2020-08-28 | 2020-08-28 | Low-pressure-cylinder few-steam heating system and method capable of achieving annual operation |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113494321A (en) * | 2021-04-25 | 2021-10-12 | 西安热工研究院有限公司 | High-pressure cylinder zero-output-force-based bus pipe connection system and operation method |
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| CN212408958U (en) * | 2020-08-28 | 2021-01-26 | 西安热工研究院有限公司 | Low-pressure-cylinder few-steam heating system capable of achieving annual commissioning |
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- 2020-08-28 CN CN202010888453.8A patent/CN111878949A/en active Pending
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| CN212408958U (en) * | 2020-08-28 | 2021-01-26 | 西安热工研究院有限公司 | Low-pressure-cylinder few-steam heating system capable of achieving annual commissioning |
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| CN113494321A (en) * | 2021-04-25 | 2021-10-12 | 西安热工研究院有限公司 | High-pressure cylinder zero-output-force-based bus pipe connection system and operation method |
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