CN212408958U - Low-pressure-cylinder few-steam heating system capable of achieving annual commissioning - Google Patents
Low-pressure-cylinder few-steam heating system capable of achieving annual commissioning Download PDFInfo
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- CN212408958U CN212408958U CN202021852373.9U CN202021852373U CN212408958U CN 212408958 U CN212408958 U CN 212408958U CN 202021852373 U CN202021852373 U CN 202021852373U CN 212408958 U CN212408958 U CN 212408958U
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Abstract
The utility model discloses a low-pressure cylinder less steam heating system which can be put into operation all the year round and comprises a boiler, a high-pressure cylinder, a middle-pressure cylinder and a low-pressure cylinder, wherein the 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 utility model discloses utilize head soda heat exchanger and hot-water pipe network, at the central heating of heating season, the central cooling of non-heating season can realize the zero long period of running in the whole year of exerting oneself heating system of low pressure jar.
Description
[ technical field ] A method for producing a semiconductor device
The utility model belongs to the technical field of thermodynamic system, a can realize few steam heating system of low pressure cylinder of putting into operation all the year round is related to.
[ 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.
[ Utility model ] content
An object of the utility model is to solve the problem among the prior art, provide a few steam heating system of low pressure jar that can realize putting into operation all the year round. 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 above purpose, the utility model adopts the following technical scheme to realize:
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 utility model discloses further improvement lies in:
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.
Compared with the prior art, the utility model discloses following beneficial effect has:
the utility model provides a can realize few steam heating system of low pressure jar of putting into operation all the 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. 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 illustrate the technical solutions of the embodiments of the present invention, the drawings that are required 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 the thermodynamic system of the present 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 embodiments of the present invention will be clearly and completely described below with reference to the accompanying 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, as 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 accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to 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. indicate the orientation or position relationship based on the orientation or position relationship shown in the drawings, or the orientation or position relationship that the product of the present invention is usually placed when in use, the description is only for convenience of description and simplification, but the indication or suggestion that the device or element to be referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be interpreted 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 explicitly stated or limited otherwise, 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 meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
The present invention will be described in further detail with reference to the accompanying drawings:
referring to fig. 1, the utility model discloses can realize the few steam heating system of low pressure cylinder of putting into operation all the year, including boiler 1, boiler 1's steam extraction gets into 2 acts of high-pressure cylinder, and the steam extraction of high-pressure cylinder 2 returns to 1 reheat of boiler, and the steam extraction after the reheat gets into 3 acts of intermediate pressure cylinder, and the steam extraction of intermediate pressure cylinder 3 gets into 4 acts of low-pressure cylinder, and the steam extraction of low-pressure cylinder 4 is in proper order through condenser 6, condensate pump 7, low pressure heater group 8, gets into boiler 1 after water feed pump 9 and high pressure heater group 10 intensifies and steps up, accomplishes the steam-water circulation. 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 utility model discloses can realize the few steam heating method of low pressure cylinder of putting into operation all the year round, including following step:
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 (5)
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).
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| CN202021852373.9U CN212408958U (en) | 2020-08-28 | 2020-08-28 | Low-pressure-cylinder few-steam heating system capable of achieving annual commissioning |
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| CN111878949A (en) * | 2020-08-28 | 2020-11-03 | 西安热工研究院有限公司 | Low-pressure-cylinder few-steam heating system and method capable of achieving annual operation |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111878949A (en) * | 2020-08-28 | 2020-11-03 | 西安热工研究院有限公司 | Low-pressure-cylinder few-steam heating system and method capable of achieving annual operation |
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