CN215408773U - Multi-heat-source step heat supply energy-saving system of steam booster - Google Patents
Multi-heat-source step heat supply energy-saving system of steam booster Download PDFInfo
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- CN215408773U CN215408773U CN202121210628.6U CN202121210628U CN215408773U CN 215408773 U CN215408773 U CN 215408773U CN 202121210628 U CN202121210628 U CN 202121210628U CN 215408773 U CN215408773 U CN 215408773U
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Abstract
The utility model discloses a multi-heat-source cascade heat supply energy-saving system of a steam booster, which comprises a steam turbine intermediate pressure cylinder, a steam turbine low pressure cylinder, a condenser, a preposed heat supply network condenser, the steam booster, a steam booster heat supply network condenser, a backpressure machine heat supply network condenser, a heat supply network heater, a heat supply network backpressure machine, a heat supply network generator and a main transformer, wherein the steam turbine intermediate pressure cylinder is connected with the steam turbine low pressure cylinder through a pipeline, the pipeline connected with the steam turbine intermediate pressure cylinder and the steam turbine low pressure cylinder is also connected with the heat supply network backpressure machine, the heat supply network backpressure machine is electrically connected with the heat supply network generator, the heat supply network generator is electrically connected with the main transformer, the multi-heat-source cascade heat supply energy-saving system of the steam booster can be sequentially put into a plurality of stages of heat supply such as steam turbine steam discharge, heat supply backpressure machine steam discharge, steam booster steam discharge and heat supply backpressure machine steam extraction according to different heat supply network loads and heat source qualities, so as to realize multi-level heat source cascade utilization and energy utilization, the energy-saving effect is good.
Description
Technical Field
The utility model relates to the technical field of heat supply, in particular to a multi-heat-source step heat supply energy-saving system of a steam booster.
Background
China, as a responsible kingdom, does not practise Paris' agreement. On the united nations congress of 9, month and 22 in 2020, the chairman again zheng the commitment: china will improve the autonomous contribution of the country, adopt more powerful policies and measures, strive for the carbon dioxide emission to reach the peak value 2030 years ago, strive for the carbon neutralization 2060 years ago. The energy-saving emission-reducing measures are the key for solving the century-old problem and are the important precondition for the common development of human beings.
China is a country with a single energy type, the coal storage accounts for more than 70% of the total energy, and although clean energy such as wind, light and the like are vigorously developed in recent years to generate electricity, a coal-fired unit of a thermal power plant is undeniably an irreplaceable basic component in a power grid. Therefore, the coal-fired unit is of great significance in social benefit and economic benefit when being subjected to energy-saving reconstruction.
The country pays more and more attention to the environment, and the scattered small boilers with large pollution are gradually replaced by a centralized heating mode of cogeneration; with the acceleration of the urbanization process, the scale of the regional cogeneration is continuously increased, and a plurality of thermal power plants cannot meet the increasing heat load requirement; meanwhile, the national heating project of the reform committee proposes: the low-grade waste heat resources are fully recycled and used for heating in cities and towns, the energy utilization efficiency is improved, the coal consumption is reduced, and the air quality is improved.
According to fig. 1: in the prior art, the steam discharged by a steam turbine intermediate pressure cylinder (1) enters a low pressure cylinder (2) to do work, the discharged steam contains a large amount of latent heat, the discharged steam is condensed into water in a condenser or an air cooling island (3), and then enters a thermodynamic system again, and generally, the steam discharged by the intermediate pressure cylinder (1) is adopted by a thermal power plant to be used for heating and air exhaust, and enters a heat supply network heater (4) to heat a heat supply network return water through a pressure regulating valve (5).
However, the existing steam turbine multi-heat source cascade heating energy-saving system has some disadvantages in use, as follows:
1. all cold end losses of latent heat of vaporization in the steam turbine exhaust;
2. the heating steam extraction and pressure reduction have throttling loss, so that the waste of high-parameter steam energy is caused;
3. the heat supply source is single, and the cascade utilization of energy is not realized.
An effective solution to the problems in the related art has not been proposed yet.
SUMMERY OF THE UTILITY MODEL
Technical problem to be solved
In view of the defects in the prior art, the present invention provides a multi-heat-source stepped heating energy-saving system for a steam turbine, so as to solve the problems in the background art.
(II) technical scheme
In order to solve the problems in the background art, the utility model adopts the following specific technical scheme:
a multi-heat-source step heat supply energy-saving system of a steam booster is characterized by comprising a steam turbine intermediate pressure cylinder, a steam turbine low pressure cylinder, a condenser, a preposed heat supply network condenser, a steam booster heat supply network condenser, a backpressure heat supply network condenser, a heat supply network heater, a heat supply network backpressure machine, a heat supply network generator and a main transformer, wherein the steam turbine intermediate pressure cylinder is connected with the steam turbine low pressure cylinder through a pipeline, the pipeline connected with the steam turbine intermediate pressure cylinder and the steam turbine low pressure cylinder is also connected with the heat supply network backpressure machine, the heat supply network backpressure machine is electrically connected with the heat supply network generator, the heat supply network generator is electrically connected with the main transformer, the heat supply network backpressure machine is connected with the heat supply network heater through a pipeline, the heat supply network backpressure machine is connected with the backpressure steam condenser through a pipeline, the steam booster is connected with the heat supply network condenser through a pipeline, the low-pressure cylinder of the steam turbine is connected with the condenser through a pipeline, the low-pressure cylinder of the steam turbine is connected with the pipeline connected with the condenser and is connected with the preposed heat supply network condenser, the low-pressure cylinder of the steam turbine is connected with the pipeline connected with the preposed heat supply network condenser and is connected with the turbine booster, and the preposed heat supply network condenser, the turbine booster, the turbine heat supply network condenser, the backpressure machine heat supply network condenser and the heat supply network heater are sequentially connected with an external heat supply network head through an external heat supply network pipeline.
Furthermore, an eleventh valve is arranged on a pipeline connecting the steam turbine intermediate pressure cylinder, the steam turbine low pressure cylinder and the heat supply network backpressure machine.
Furthermore, a second valve is arranged on a pipeline, connected with the front heat supply network condenser, of the steam turbine low-pressure cylinder and the condenser.
Furthermore, a first valve is arranged on a pipeline connecting the peripheral pipeline of the second valve and the steam booster.
Furthermore, a fifth valve is arranged on an inlet pipeline of the preposed heat supply network condenser.
Furthermore, a sixth valve is arranged on a pipeline connecting the preposed heat supply network condenser and the turbine booster heat supply network condenser.
Furthermore, a seventh valve is arranged on a pipeline connecting the turbine heat supply network condenser and the backpressure machine heat supply network condenser.
Furthermore, a fourth valve is arranged on a pipeline connecting the heat supply network back press and the steam increasing machine.
Furthermore, an eighth valve is arranged on a pipeline connecting the backpressure machine heat supply network condenser and the heat supply network heater.
Furthermore, a ninth valve is arranged on a pipeline connecting the heat supply network backpressure machine and the backpressure machine heat supply network condenser.
Furthermore, a tenth valve is arranged on a pipeline connecting the heat supply network back press and the heat supply network heater.
Furthermore, a twelfth valve is arranged on a bypass pipeline at two ends of the condenser of the heat supply network of the turbine booster.
Furthermore, a first valve is arranged on a pipeline connecting the low-pressure cylinder of the steam turbine, the condenser and the steam booster.
(III) advantageous effects
Compared with the prior art, the utility model provides a multi-heat-source step heat supply energy-saving system of a steam booster, which has the following beneficial effects:
(1) compared with the single heating and steam extraction heat supply, the multi-heat-source step heat supply energy-saving system of the steam booster can sequentially input multi-stage heat sources such as steam turbine exhaust, heat supply back pressure machine exhaust, steam booster exhaust and heat supply back pressure machine steam extraction according to different heat network loads and heat source qualities required, so that the multilevel heat supply and the step utilization of energy are realized, and the energy-saving effect is good.
(2) Compared with the traditional steam extraction and heat supply system using a pressure regulating valve, the multi-heat-source step heat supply energy-saving system of the steam booster adopts heating steam extraction to drive a heat supply back pressing machine, and uses the waste heat of the steam exhaust of the heat supply back pressing machine to heat the circulating water of a heat supply network; the heat supply back pressure machine drives a heat supply generator, and power generation is connected to a main transformer, so that pressure energy loss caused by pressure regulation and throttling is eliminated.
(3) In the traditional steam extraction and heat supply mode, the latent heat of steam exhaust vaporization of the steam turbine enters a condenser or a cold end of an air cooling island to be lost; the multi-heat-source step heat supply energy-saving system of the steam booster recovers part of steam turbine exhaust vaporization latent heat by using the preposed heat supply network condenser in a mode of improving the steam turbine exhaust back pressure, and heats the circulating water return of the heat supply network.
(4) The multi-heat-source step heat supply energy-saving system of the steam turbine improves the steam exhaust pressure and temperature of part of the steam turbine through the steam turbine, and can recover more latent heat of vaporization of steam turbine exhaust.
(5) The multi-heat-source stepped heat supply energy-saving system of the steam booster can completely recover latent heat of steam exhaust vaporization of the steam turbine, so that the loss of the cold end of the unit is zero, and the heat supply economical efficiency of the unit is greatly improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
Figure 1 is a schematic view of a main structure according to the prior art;
fig. 2 is a block diagram of a main structure of a multi-heat-source stepped heating energy-saving system of a steam booster according to an embodiment of the utility model.
1. A turbine intermediate pressure cylinder; 2. a low-pressure cylinder of the steam turbine; 3. a condenser; 4. a preposed heat supply network condenser; 5. a steam increasing machine; 6. a turbine heat supply network condenser; 7. a back pressure machine heat supply network condenser; 8. a heat supply network heater; 9. A heat supply network back press; 10. a heat network generator; 11. a main transformer; 12. an eleventh valve; 13. a first valve; 14. a second valve; 15. a fifth valve; 16. a sixth valve; 17. a seventh valve; 18. a fourth valve; 19. an eighth valve; 20. a ninth valve; 21. a tenth valve; 22. a twelfth valve.
Detailed Description
For further explanation of the various embodiments, the drawings which form a part of the disclosure and which are incorporated in and constitute a part of this specification, illustrate embodiments and, together with the description, serve to explain the principles of operation of the embodiments, and to enable others of ordinary skill in the art to understand the various embodiments and advantages of the utility model, and, by reference to these figures, reference is made to the accompanying drawings, which are not to scale and wherein like reference numerals generally refer to like elements.
According to the embodiment of the utility model, a multi-heat-source stepped heating energy-saving system of a steam booster is provided.
Referring to the drawings and the detailed description, the utility model is further explained, as shown in fig. 1-2, a multi-heat-source cascade heat supply energy saving system of a steam turbine according to an embodiment of the utility model includes a steam turbine intermediate pressure cylinder 1, a steam turbine low pressure cylinder 2, a condenser 3, a preposed heat supply network condenser 4, a steam turbine 5, a steam turbine heat supply network condenser 6, a backpressure machine heat supply network condenser 7, a heat supply network heater 8, a heat supply network backpressure machine 9, a heat supply network generator 10 and a main transformer 11, wherein the steam turbine intermediate pressure cylinder 1 is connected with the steam turbine low pressure cylinder 2 through a pipeline, the pipeline connecting the steam turbine intermediate pressure cylinder 1 and the steam turbine low pressure cylinder 2 is further connected with the heat supply network backpressure machine 9, the heat supply network backpressure machine 9 is electrically connected with the heat supply network generator 10, the heat supply network generator 10 is electrically connected with the main transformer 11, the heat supply network backpressure machine 9 is connected with the heat supply network heater 8 through a pipeline, the heat supply network backpressure machine 9 is connected with the backpressure heat supply network condenser 7 through a pipeline, the heat supply network backpressure machine 9 is connected with the steam booster 5 through a pipeline, the steam booster 5 is connected with the steam booster heat supply network condenser 6 through a pipeline, the low-pressure turbine cylinder 2 is connected with the condenser 3 through a pipeline, the pipeline connecting the low-pressure turbine cylinder 2 and the condenser 3 is connected with the preposed heat supply network condenser 4, the pipeline connecting the low-pressure turbine cylinder 2, the condenser 3 and the preposed heat supply network condenser 4 is connected with the steam booster 5, the preposed heat supply network condenser 4, the steam booster 5, the steam booster heat supply network condenser 6, the backpressure heat supply network condenser 7 and the heat supply network heater 8 are sequentially connected with the external heat supply network head station through external heat supply network pipelines, an eleventh valve 12 is arranged on a pipeline connecting the steam turbine intermediate pressure cylinder 1, the steam turbine low pressure cylinder 2 and the heat supply network backpressure machine 9, a second valve 14 is arranged on a pipeline connecting the steam turbine low pressure cylinder 2, the condenser 3 and the preposed heat supply network condenser 4, a first valve 13 is arranged on a pipeline connecting the peripheral pipeline of the second valve 14 and the steam booster 5, a fifth valve 15 is arranged on an inlet pipeline of the preposed heat supply network condenser 4, a sixth valve 16 is arranged on a pipeline connecting the preposed heat supply network condenser 4 and the steam booster heat supply network condenser 6, a seventh valve 17 is arranged on a pipeline connecting the steam booster heat supply network condenser 6 and the backpressure heat supply network condenser 7, a fourth valve 18 is arranged on a pipeline connecting the heat supply network backpressure machine 9 and the steam booster 5, and an eighth valve 19 is arranged on a pipeline connecting the backpressure steam condenser heat supply network heater 7 and the heat supply network heater 8, a ninth valve 20 is arranged on a pipeline connected with the backpressure machine heat supply network condenser 7 through the heat supply network backpressure machine 9, a tenth valve 20 is arranged on a pipeline connected with the heat supply network heater 8 through the heat supply network backpressure machine 9, twelfth valves 22 are arranged on bypass pipelines at two ends of the steam booster heat supply network condenser 6, and first valves 14 are arranged on pipelines connected with the steam turbine low-pressure cylinder 2, the steam condenser 3 and the steam booster 5.
In practical application, the low-pressure cylinder 2 and the condenser or the air cooling island 3 are connected to lead out turbine exhaust steam which is divided into two paths, wherein one path enters the preposed heat supply network condenser 4 to heat the return water of the heat supply network; and the other path is connected to a turbine booster 5, the quality of the steam is improved by the turbine booster, and then the steam enters a turbine booster heat supply network condenser 6 to continuously heat the heat supply network backwater from the preposed heat supply network condenser 4, so that the waste heat of the exhaust steam of the steam turbine is utilized. A pressure reducer is omitted on the heating extraction steam, the heating extraction steam is directly connected to a heat supply network back pressing machine 9, the heat supply network back pressing machine is connected with a heat supply network generator 10, power generation is performed on the network, and the power generation income of enterprises is increased; the exhaust steam of the heat supply network backpressure machine 9 is connected to a backpressure machine heat supply network condenser 7 to heat the heat supply network water from a turbine-increasing heat supply network condenser 6; punching and steam extracting are carried out on the heat supply network back pressing machine 9, the punched and steam extracted as new heating steam extraction is divided into two paths, one path is connected to the steam booster 5 and is used as power steam of the steam booster; the other path is connected with a heat supply network heater 8 to continuously heat the heat supply network water from a heat supply network condenser 7 of the back pressure machine; the return water of the heat supply network sequentially passes through the preposed heat supply network condenser 4, the steam booster heat supply network condenser 6, the back pressure machine heat supply network condenser 7 and the heat supply network heater 8 for heating, and the gradient utilization of energy is realized.
For the convenience of understanding the technical solutions of the present invention, the following detailed description will be made on the working principle or the operation mode of the present invention in the practical process.
In summary, by means of the above technical scheme of the utility model, the steam turbine exhaust, heat supply back press steam extraction and other heat sources with different qualities are established in the steam turbine multi-heat source cascade heat supply energy saving system on the basis of the existing system of the thermal power plant, and the steam turbine exhaust, the heat supply back press steam extraction, the steam turbine exhaust and the heat supply back press steam extraction can be sequentially put into the heat supply system according to the difference of heat network demand heat load and heat source quality, so that the multilevel heat supply and the cascade utilization of energy are realized; compared with the traditional heat supply mode, the operation is more flexible, and the energy-saving and emission-reducing effects are better. The multi-heat-source cascade heat supply energy-saving system of the steam booster drives a heat supply generator through a heat supply back pressure machine, and power generation is connected to a main transformer, so that pressure energy loss caused by heating steam extraction, pressure regulation and throttling is eliminated. The multi-heat-source step heat supply energy-saving system of the steam booster adopts heating extraction to drive a heat supply back pressing machine, and utilizes the waste heat of the steam exhaust of the heat supply back pressing machine to heat the circulating water of a heat supply network; the steam-increasing machine multi-heat-source step heat supply energy-saving system adopts the steam extracted by the heat supply back pressure machine as new heating steam extraction, and the steam extracted by the back pressure machine enters the heat supply network heater to heat the circulating water of the heat supply network; heating the circulating water of the heat supply network by using the exhaust waste heat of the heat supply back press; the multi-heat-source step heat supply energy-saving system of the steam booster adopts the steam extracted by the heat supply back press as the power steam of the steam booster; the multi-heat-source cascade heat supply energy-saving system of the steam booster recovers latent heat of steam exhaust vaporization of the steam turbine for heat supply; the multi-heat-source cascade heat supply energy-saving system of the steam booster can further promote the recovery of latent heat of vaporization of the exhaust steam of the steam turbine by adopting the steam booster to promote the pressure and the temperature of the exhaust steam of the steam turbine under the condition of not changing three main machines of the thermal power plant; the multi-heat-source stepped heat supply energy-saving system of the steam booster can completely recover latent heat of steam exhaust vaporization of the steam turbine, so that the loss of the cold end of the unit is zero, the heat supply coal consumption of the unit is greatly reduced, the heat supply economical efficiency of the unit is improved, and the enterprise benefit is improved.
In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "disposed," "connected," "secured," "screwed" and the like are to be construed broadly, e.g., as meaning fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; the terms may be directly connected or indirectly connected through an intermediate, and may be communication between two elements or interaction relationship between two elements, unless otherwise specifically limited, and the specific meaning of the terms in the present invention will be understood by those skilled in the art according to specific situations.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the utility model, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (13)
1. A multi-heat-source stepped heat supply energy-saving system of a steam booster is characterized by comprising a steam turbine intermediate pressure cylinder (1), a steam turbine low pressure cylinder (2), a condenser (3), a preposed heat supply network condenser (4), the steam booster (5), a steam booster heat supply network condenser (6), a backpressure machine heat supply network condenser (7), a heat supply network heater (8), a heat supply network backpressure machine (9), a heat supply network generator (10) and a main transformer (11), wherein the steam turbine intermediate pressure cylinder (1) is connected with the steam turbine low pressure cylinder (2) through a pipeline, the pipeline connecting the steam turbine intermediate pressure cylinder (1) and the steam turbine low pressure cylinder (2) is also connected with the heat supply network backpressure machine (9), the heat supply network backpressure machine (9) is electrically connected with the heat supply network generator (10), the heat supply network generator (10) is electrically connected with the main transformer (11), and the heat supply network backpressure machine (9) is connected with the heat supply network heater (8) through a pipeline, the heat supply network backpressure machine (9) is connected with a backpressure machine heat supply network condenser (7) through a pipeline, the heat supply network backpressure machine (9) is connected with a steam booster (5) through a pipeline, the steam booster (5) is connected with a steam booster heat supply network condenser (6) through a pipeline, a steam turbine low-pressure cylinder (2) is connected with the condenser (3) through a pipeline, the steam turbine low-pressure cylinder (2) and the pipeline connected with the condenser (3) are connected with a front heat supply network condenser (4), the steam turbine low-pressure cylinder (2), the condenser (3) and the pipeline connected with the front heat supply network condenser (4) are connected with the steam booster (5), the front heat supply network condenser (4), the steam booster (5), the steam booster heat supply network condenser (6), the backpressure machine heat supply network condenser (7) and the heat supply network heater (8) sequentially pass through a pipeline and an external heat supply network pipeline and the external heat supply network heater (7) And connecting the net head station.
2. The multi-heat-source stepped heat supply energy-saving system of the steam turbine as claimed in claim 1, wherein an eleventh valve (12) is arranged on a pipeline connecting the steam turbine intermediate pressure cylinder (1), the steam turbine low pressure cylinder (2) and the heat supply network back pressure machine (9).
3. The turbine multi-heat-source stepped heating energy-saving system according to claim 1, wherein a second valve (14) is arranged on a pipeline connecting the turbine low-pressure cylinder (2), the condenser (3) and the preposed heat supply network condenser (4).
4. The multi-heat-source stepped heating energy-saving system of the steam booster as claimed in claim 3, wherein a first valve (13) is arranged on a pipeline connecting a peripheral pipeline of the second valve (14) and the steam booster (5).
5. The turbine multi-heat-source stepped heating energy-saving system according to claim 1, wherein a fifth valve (15) is arranged on an inlet pipeline of the preposed heat supply network condenser (4).
6. The turbine multi-heat-source stepped heat supply energy-saving system according to claim 1, wherein a sixth valve (16) is arranged on a pipeline connecting the preposed heat supply network condenser (4) and the turbine heat supply network condenser (6).
7. The multi-heat-source stepped heat supply energy-saving system of the steam turbine as claimed in claim 1, wherein a seventh valve (17) is arranged on a pipeline connecting the steam turbine heat supply network condenser (6) and the back press heat supply network condenser (7).
8. The multi-heat-source stepped heating energy-saving system of the steam booster as recited in claim 1, wherein a fourth valve (18) is arranged on a pipeline connecting the heat supply network back press (9) and the steam booster (5).
9. The turbine multi-heat-source stepped heat supply energy-saving system of claim 1, wherein an eighth valve (19) is arranged on a pipeline connecting the back press heat supply network condenser (7) and the heat supply network heater (8).
10. The turbine multi-heat-source stepped heat supply energy-saving system of claim 1, wherein a ninth valve (20) is arranged on a pipeline connecting the back press (9) and the back press heat supply network condenser (7).
11. The multi-heat-source stepped heating energy-saving system of the steam booster as recited in claim 1, wherein a tenth valve (21) is provided on a pipeline connecting the heat supply network back press (9) and the heat supply network heater (8).
12. The multi-heat-source stepped heating energy-saving system of the steam booster according to claim 1, wherein a twelfth valve (22) is arranged on a bypass pipeline at two ends of the steam booster heat network condenser (6).
13. The multi-heat-source stepped heat supply energy-saving system of the steam turbine as claimed in claim 1, wherein a first valve (13) is arranged on a pipeline connecting the low-pressure cylinder (2) of the steam turbine, the condenser (3) and the steam turbine (5).
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113339079A (en) * | 2021-06-01 | 2021-09-03 | 联合瑞升(天津)科技有限公司 | Multi-heat-source step heat supply energy-saving system of steam booster |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113339079A (en) * | 2021-06-01 | 2021-09-03 | 联合瑞升(天津)科技有限公司 | Multi-heat-source step heat supply energy-saving system of steam booster |
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