CN108825317B - Heat comprehensive utilization system - Google Patents
Heat comprehensive utilization system Download PDFInfo
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- CN108825317B CN108825317B CN201810694517.3A CN201810694517A CN108825317B CN 108825317 B CN108825317 B CN 108825317B CN 201810694517 A CN201810694517 A CN 201810694517A CN 108825317 B CN108825317 B CN 108825317B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K17/00—Using steam or condensate extracted or exhausted from steam engine plant
- F01K17/02—Using steam or condensate extracted or exhausted from steam engine plant for heating purposes, e.g. industrial, domestic
- F01K17/025—Using steam or condensate extracted or exhausted from steam engine plant for heating purposes, e.g. industrial, domestic in combination with at least one gas turbine, e.g. a combustion gas turbine
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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
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K11/00—Plants characterised by the engines being structurally combined with boilers or condensers
- F01K11/02—Plants characterised by the engines being structurally combined with boilers or condensers the engines being turbines
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K13/00—General layout or general methods of operation of complete plants
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- Combustion & Propulsion (AREA)
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Abstract
The invention discloses a comprehensive heat utilization system, and belongs to the technical field of thermal power generation. The invention discloses a heat comprehensive utilization system, which comprises a secondary reheating unit, wherein a reheating system of the secondary reheating unit comprises a main steam turbine, a high-pressure heater group and a low-pressure heater group, the steam inlet of the main steam turbine comes from a boiler, the main steam turbine is used for driving a generator, and the steam inlet of the high-pressure heater group and the steam inlet of the low-pressure heater group come from the main steam turbine through pipelines; the steam-cooled generator set comprises a high-pressure heater group, a main steam turbine and an external steam cooler, and is characterized by further comprising an energy storage device, wherein the external steam cooler is arranged on a pipeline between the high-pressure heater group and the main steam turbine and is connected with the energy storage device through a pipeline to form an energy storage circulating system, so that the external steam cooler can convey heat to the energy storage device. The invention is different from the conventional regenerative system of the secondary reheating unit, and introduces the energy storage device into the regenerative system through the external steam cooler, and stores the overheating energy in the regenerative system for other uses.
Description
Technical Field
The invention relates to a comprehensive heat utilization system, and belongs to the technical field of thermal power generation.
Background
The purpose of the traditional regenerative system of the coal-fired power generation turbine is to improve the average temperature of the whole heat absorption process, and the cycle efficiency is improved. For a double reheat coal-fired unit, the feed water temperature of the boiler is between 320 ℃ and 330 ℃, and is not allowed to rise, otherwise the feed water is vaporized at the inlet of the economizer. For the regenerative system of the conventional secondary reheating unit, after the feed water passes through the first high-pressure heater (the high-pressure heater closest to the boiler), the feed water temperature is further improved through the external steam cooler, so that the primary steam extraction pressure (primary reheating pressure or steam inlet of the first high-pressure heater) cannot be too high, and the over-temperature of the feed water temperature is prevented, so that the circulation efficiency of the regenerative system of the steam turbine is influenced; if an external steam cooler is omitted, the heat of the superheated steam in the inlet steam of the heater cannot be fully utilized, so that the heat is wasted, and the circulation efficiency is also influenced.
Disclosure of Invention
The invention aims to: aiming at the existing problems, the invention provides a heat comprehensive utilization system, which is different from a conventional heat regeneration system of a secondary reheating unit.
The technical scheme adopted by the invention is as follows:
a heat comprehensive utilization system comprises a double reheating unit with a reheating system, wherein the reheating system of the double reheating unit comprises a boiler, a main steam turbine, a high-pressure heater group, a deaerator and a low-pressure heater group, the steam inlet of the main steam turbine comes from the boiler, the main steam turbine is used for driving a generator, the steam inlet of the high-pressure heater group comes from the main steam turbine through a pipeline, the steam inlet of the deaerator comes from the main steam turbine and the steam inlet of the low-pressure heater group through a pipeline, the high-pressure heater group, the deaerator and the low-pressure heater group are used for heating water leading to the boiler, and the high-pressure heater group is close to the boiler; still include energy memory, be equipped with external steam cooler on the pipeline between high pressure heater group and the main steam turbine, external steam cooler passes through the pipeline with energy memory and links to each other and form energy storage circulation system to realize external steam cooler with heat transport to energy memory.
When the technical mode of the invention is adopted, two paths of heat exchange media circulating in the external steam cooler are as follows: the circulation of the same way is from the high temperature steam of main steam turbine flow direction high pressure heater group, and another way is from energy memory's cold source liquid, and cold source liquid and high temperature steam carry out the heat exchange, get into energy memory (realize storing energy memory with the heat through the heat exchange) after cold source liquid is heated, then cold source liquid reentrants external steam cooler, this just forms energy storage circulation system. For the existing heat recovery system of the conventional double reheating unit, the external steam cooler is used for heating water led to the boiler; the two paths of heat exchange media circulating in the external steam cooler are as follows: one path of the high-temperature steam flows from the main turbine to the high-pressure heater group, the other path of the high-temperature steam flows from the high-temperature heater group to the boiler, the water exchanges heat with the high-temperature steam, and the water flows to the boiler after being heated. In the present invention, the high temperature steam flowing through the external steam cooler is not used to heat the water flowing to the boiler, but is used to heat the cold source liquid from the energy storage device. The invention introduces the energy storage device into the heat regenerative system through the external steam cooler, and stores the overheating energy in the heat regenerative system for other uses.
According to the heat comprehensive utilization system, the number of the external steam coolers is multiple.
Furthermore, the external steam coolers are connected in series.
Furthermore, all the external steam coolers are connected in parallel.
The invention relates to a heat comprehensive utilization system, which comprises 1 external steam cooler.
According to the heat comprehensive utilization system, the energy storage device is connected with the energy consumption equipment, and the heat stored by the energy storage device is provided for the energy consumption equipment. Optionally, the energy consuming device is the boiler, and the heat stored in the energy storage device is used for preheating the low temperature air entering the boiler. The heat absorption capacity in the air preheating process can be reduced, and the boiler efficiency is improved, so that the efficiency of the whole power plant is improved. Optionally, the energy consuming device is a shaft seal air supply device, and the heat stored in the energy storage device is used for heating the steam supplied to the shaft seal by the shaft seal air supply device. When the design is adopted, the corresponding electric heating device can be cancelled, the power consumption of a power plant is effectively saved, and the investment of the power plant is reduced
The invention relates to a heat comprehensive utilization system, wherein a main turbine comprises an ultrahigh pressure cylinder, a high pressure cylinder, an intermediate pressure cylinder and a low pressure cylinder, and 5 high pressure heaters are arranged in a high pressure heater group; wherein, the steam inlet of the 1 st high-pressure heater comes from the steam extraction of the ultra-high pressure cylinder through a pipeline, the steam inlet of the 2 nd high-pressure heater and the 3 rd high-pressure heater comes from the steam extraction of the high pressure cylinder through a pipeline, the steam inlet of the 4 th high-pressure heater comes from the steam extraction of the high pressure cylinder through a pipeline, the steam inlet of the 5 th high-pressure heater comes from the steam extraction of the medium pressure cylinder through a pipeline, and the 1 st high-pressure heater is close to the boiler; the number of the external steam coolers is 3, and the external steam coolers are respectively arranged on pipelines for connecting the 2 nd high-pressure heater, the 3 rd high-pressure heater and the high-pressure cylinder and on pipelines for connecting the 5 th high-pressure heater and the intermediate pressure cylinder; the 3 external steam coolers are connected in series and then connected in series with the energy storage device to form an energy storage circulation system.
The invention relates to a heat comprehensive utilization system, wherein a main turbine comprises an ultrahigh pressure cylinder, a high pressure cylinder, an intermediate pressure cylinder and a low pressure cylinder, and 5 high pressure heaters are arranged in a high pressure heater group; wherein, the steam inlet of the 1 st high-pressure heater comes from the steam extraction of the ultra-high pressure cylinder through a pipeline, the steam inlet of the 2 nd high-pressure heater and the 3 rd high-pressure heater comes from the steam extraction of the high pressure cylinder through a pipeline, the steam inlet of the 4 th high-pressure heater comes from the steam extraction of the high pressure cylinder through a pipeline, the steam inlet of the 5 th high-pressure heater comes from the steam extraction of the medium pressure cylinder through a pipeline, and the 1 st high-pressure heater is close to the boiler; the number of the external steam coolers is 3, and the external steam coolers are respectively arranged on pipelines for connecting the 2 nd high-pressure heater, the 3 rd high-pressure heater and the high-pressure cylinder and on pipelines for connecting the 5 th high-pressure heater and the intermediate pressure cylinder; the 3 external steam coolers are connected in parallel and then connected in series with the energy storage device to form an energy storage circulating system.
In summary, due to the adoption of the technical scheme, the invention has the beneficial effects that:
the comprehensive heat utilization system is different from a conventional heat regeneration system of a secondary reheating unit, an energy storage device is introduced into the heat regeneration system through an external steam cooler, and the superheated energy in the heat regeneration system is stored for other use.
Drawings
The invention will now be described, by way of example, with reference to the accompanying drawings, in which:
FIG. 1 is a schematic view of the heat integration system of the present invention;
FIG. 2 is a schematic view of the integrated heat utilization system of the present invention applied to a boiler;
FIG. 3 is a schematic view of the heat integration system of the present invention applied to a shaft seal.
The labels in the figure are: 1-ultrahigh pressure cylinder, 2-high pressure cylinder, 3-intermediate pressure cylinder, 4-low pressure cylinder, 5-generator, 6-boiler, 7-energy storage device, 8-external steam cooler, 9-condenser, 10-high pressure heater group, 11-deaerator, 12-low pressure heater group and 13-shaft seal steam delivery device.
Detailed Description
All of the features disclosed in this specification, or all of the steps in any method or process so disclosed, may be combined in any combination, except combinations of features and/or steps that are mutually exclusive.
Any feature disclosed in this specification may be replaced by alternative features serving equivalent or similar purposes, unless expressly stated otherwise. That is, unless expressly stated otherwise, each feature is only an example of a generic series of equivalent or similar features.
As shown in fig. 1 to fig. 3, the heat comprehensive utilization system of the embodiment includes a double reheating unit having a reheating system, the reheating system of the double reheating unit includes a boiler 6, a main steam turbine, a high-pressure heater group 10, a deaerator 11, and a low-pressure heater group 12, steam of the main steam turbine is from the boiler 6, the main steam turbine is used for driving a generator 5, steam of the high-pressure heater group 10 is from the main steam turbine through a pipeline, steam of the deaerator 11 is from the main steam turbine through a pipeline, steam of the low-pressure heater group 12 is from the main steam turbine through a pipeline, the high-pressure heater group 10, the deaerator 11, and the low-pressure heater group 12 are used for heating water leading to the boiler 6, and the high-pressure heater group 10 is close to the boiler 6; still include energy memory 7, be equipped with external steam cooler 8 on the pipeline between high pressure heater group 10 and the main steam turbine, external steam cooler 8 links to each other through the pipeline with energy memory 7 and forms energy storage circulation system to realize that external steam cooler 8 carries the heat to energy memory.
In the present invention, the two heat exchange media circulating in the external steam cooler 8 are: the circulation of the same way is the high temperature steam that flows to high pressure heater group 10 from the main steam turbine, and another way is the cold source liquid that comes from energy memory 7, and cold source liquid and high temperature steam carry out the heat exchange, and cold source liquid gets into energy memory 7 (realize storing energy memory 7 with the heat through the heat exchange) after being heated, then cold source liquid reentrants external steam cooler 8, and this just forms energy storage circulation system. For the existing heat recovery system of the conventional double reheating unit, the external steam cooler 8 is used for heating water leading to the boiler 6; the two heat exchange media circulating in the external steam cooler 8 are: one path is high-temperature steam flowing from the main turbine to the high-pressure heater group 10, the other path is water flowing from the high-temperature heater group 10 to the boiler 6, the water exchanges heat with the high-temperature steam, and the water flows to the boiler 6 after being heated. In the present invention, the high temperature steam flowing through the external steam cooler 8 is not used to heat the water flowing to the boiler 6, but is used to heat the cold source liquid from the energy storage device 7. The invention introduces an energy storage device 7 into the regenerative system through an external steam cooler 8, and stores the overheating energy in the regenerative system for other uses.
In another embodiment, there are a plurality of external steam coolers 8 according to a further optimization of this embodiment. Alternatively, in one embodiment, the external steam coolers 8 are connected in series and then connected in series with the energy storage device 7 to form an energy storage circulation system. The cold source liquid flows out of the energy storage device 7 and then sequentially enters each external steam cooler 8 and then enters the energy storage device 7. Alternatively, in another embodiment, the external steam coolers 8 are connected in parallel and then connected in series with the energy storage device 7 to form an energy storage circulation system. Cold source liquid flows out of the energy storage device 7, then is divided into a plurality of external steam coolers 8, and then is converged and enters the energy storage device 7.
In another embodiment, based on further optimization of this embodiment, the number of the external steam coolers 8 is 1.
Based on a further optimization of the embodiment, in another embodiment, the energy storage device 7 is connected to an energy consuming device, and the heat stored in the energy storage device 7 is provided to the energy consuming device. Alternatively, in one embodiment, as shown in fig. 2, the energy consuming device is the boiler 6, and the heat stored in the energy storage device 7 is used to preheat the low temperature air entering the boiler 6. The heat absorption capacity in the air preheating process can be reduced, and the boiler efficiency is improved, so that the efficiency of the whole power plant is improved. Alternatively, in another embodiment, as shown in fig. 3, the energy consuming device is a shaft seal air feeding device 13, and the heat stored in the energy storage device 7 is used for heating the steam fed to the shaft seal by the shaft seal air feeding device 13. The shaft seal of the main turbine is common knowledge to the skilled person and will not be described in further detail herein. When the design is adopted, a corresponding electric heating device (in the prior art, the electric heating device is used for heating steam conveyed to the shaft seal by the shaft seal air supply device 13) can be cancelled, the power consumption of a power plant is effectively saved, and the investment of the power plant is reduced.
Based on further optimization of the embodiment, in one embodiment, as shown in fig. 1, the main turbine includes an ultra-high pressure cylinder 1, a high pressure cylinder 2, an intermediate pressure cylinder 3 and a low pressure cylinder 4, and there are 5 high pressure heaters in the high pressure heater group 10; wherein, the steam inlet of the 1 st high-pressure heater comes from the steam extraction of the ultra-high pressure cylinder 1 through a pipeline, the steam inlet of the 2 nd and 3 rd high-pressure heaters comes from the steam extraction of the high pressure cylinder 2 through a pipeline, the steam inlet of the 4 th high-pressure heater comes from the steam extraction of the high pressure cylinder 2 through a pipeline, the steam inlet of the 5 th high-pressure heater comes from the steam extraction of the medium pressure cylinder 3 through a pipeline, and the 1 st high-pressure heater is close to the boiler 6; 3 external steam coolers 8 are respectively arranged on pipelines of the 2 nd high-pressure heater, the 3 rd high-pressure heater and the high-pressure cylinder 2 and pipelines of the 5 th high-pressure heater and the medium-pressure cylinder 3; the 3 external steam coolers 8 are connected in series and then connected in series with the energy storage device 7 to form an energy storage circulation system. In another embodiment, 3 external steam coolers 8 are connected in parallel and then connected in series with the energy storage device 7 to form an energy storage circulation system.
Based on the specific operation processes of the above embodiments, in one embodiment, the flow of the regenerative system of the secondary reheating unit is specifically described. As shown in fig. 1, the low pressure heater group 12 has 5 low pressure heaters, and the steam inlet of the 1 st low pressure heater is from the steam exhaust of the intermediate pressure cylinder 3 through a pipeline, and the steam inlet of the 2 nd, 3 rd, 4 th and 5 th low pressure heaters is from the steam extraction of the low pressure cylinder 4 through a pipeline. The working principle of the regenerative system of the secondary reheating unit is as follows: water led to the boiler 6 through a pipeline sequentially flows through a low-pressure heater group 12 (sequentially flows from a 5 th low-pressure heater to a 1 st low-pressure heater), a deaerator 11, a water feed pump (not marked and connected between the deaerator 11 and a high-pressure heater group 10), a high-pressure heater group 10 (sequentially flows from the 5 th high-pressure heater to the 1 st high-pressure heater) and then enters the boiler 6; the water is heated by the boiler 6 into high-temperature high-pressure steam which enters the ultra-high pressure cylinder 1 through a pipeline, the exhaust steam of the ultra-high pressure cylinder 1 is divided into two paths through the pipeline, the first path is the inlet steam of the 1 st high-pressure heater, and the second path enters the boiler 6 for reheating and then enters the high pressure cylinder 2; the steam inlet of the 2 nd and 3 rd high-pressure heaters comes from the extraction steam of the high-pressure cylinder 2 through a pipeline; the exhaust steam of the high-pressure cylinder 2 is divided into two paths through a pipeline, the first path is the steam inlet of the 4 th high-pressure heater, and the second path enters the boiler 6 and then enters the intermediate-pressure cylinder 3 after being reheated; the steam inlet of the 5 th high-pressure heater comes from the steam extraction of the intermediate pressure cylinder 3 through a pipeline, and the steam inlet of the deaerator 11 comes from the steam extraction of the intermediate pressure cylinder 3 through a pipeline; the exhaust steam of the intermediate pressure cylinder 3 is divided into two paths through a pipeline, the first path is the inlet steam of the 1 st low pressure heater, and the second path enters the low pressure cylinder 4; the steam inlet of 2 nd, 3 rd, 4 th and 5 th low-pressure heaters is extracted from the low-pressure cylinder 4 through a pipeline; the exhaust steam of the low pressure cylinder 4 enters the condenser 9 through a pipeline to form condensed water, and the condensed water flows out of the condenser 9 and then enters the low pressure heater group 12 … … through a condensed water pump (not marked) for recycling. In the present invention, the high temperature steam flowing through the external steam cooler 8 is not used for heating the water flowing to the boiler 6, but is used for heating the cold source liquid from the energy storage device 7; the steam inlet of the 1 st high-pressure heater comes from the exhaust steam of the ultra-high pressure cylinder 1 through a pipeline, so that the steam inlet pressure of the 1 st high-pressure heater can be improved; this improves the cycle efficiency of the turbo unit cycle. In another embodiment, taking a 1000MW ultra supercritical double reheat steam turbine generator unit as an example, the steam parameter is 35MPa 615 ℃/630 ℃/630 ℃, and when the technical scheme of the embodiment is adopted, the temperature of the feed water (water entering the boiler 6) of the boiler 6 is 330 ℃.
In summary, the heat comprehensive utilization system of the invention is different from a conventional heat regenerative system of a secondary reheating unit, and the energy storage device is introduced into the heat regenerative system through an external steam cooler, so that the superheated energy in the heat regenerative system is stored for other uses.
The invention is not limited to the foregoing embodiments. The invention extends to any novel feature or any novel combination of features disclosed in this specification and any novel method or process steps or any novel combination of features disclosed.
Claims (10)
1. A heat comprehensive utilization system comprises a double reheating unit with a reheating system, wherein the reheating system of the double reheating unit comprises a main steam turbine, a high-pressure heater group (10), a deaerator (11) and a low-pressure heater group (12), the steam inlet of the main steam turbine is from a boiler (6), the main steam turbine is used for driving a generator (5), the steam inlet of the high-pressure heater group (10) is from the main steam turbine through a pipeline, the steam inlet of the deaerator (11) is from the main steam turbine through a pipeline, the steam inlet of the low-pressure heater group (12) is from the main steam turbine through a pipeline, the high-pressure heater group (10), the deaerator (11) and the low-pressure heater group (12) are used for heating water leading to the boiler (6), and the high-pressure heater group (10) is close to the boiler (6);
the method is characterized in that: the steam-assisted steam turbine heat recovery system is characterized by further comprising an energy storage device (7), wherein an external steam cooler (8) is arranged on a pipeline between the high-pressure heater group (10) and the main steam turbine, and the external steam cooler (8) is connected with the energy storage device (7) through a pipeline to form an energy storage circulating system so as to convey heat to the energy storage device through the external steam cooler (8);
two paths of heat exchange media flow through the external steam cooler (8), one path of high-temperature steam flowing from the main steam turbine to the high-pressure heater group (10) flows, the other path of high-temperature steam flows from the cold source liquid of the energy storage device (7), the cold source liquid and the high-temperature steam perform heat exchange, the cold source liquid is heated and then enters the energy storage device (7), and then the cold source liquid enters the external steam cooler (8) again, so that an energy storage circulation system is formed.
2. The heat integrated utilization system according to claim 1, wherein: the external steam cooler (8) is provided with a plurality of external steam coolers.
3. A heat integrated utilization system according to claim 2, wherein: the external steam coolers (8) are connected in series.
4. A heat integrated utilization system according to claim 2, wherein: the external steam coolers (8) are connected in parallel.
5. The heat integrated utilization system according to claim 1, wherein: the number of the external steam coolers (8) is 1.
6. The heat integrated utilization system according to claim 1, wherein: the energy storage device (7) is connected with energy consumption equipment, and heat stored by the energy storage device (7) is provided for the energy consumption equipment.
7. The heat integrated utilization system according to claim 6, wherein: the energy consumption equipment is the boiler (6), and the heat stored by the energy storage device (7) is used for preheating low-temperature air entering the boiler (6).
8. The heat integrated utilization system according to claim 6, wherein: the energy consumption equipment is a shaft seal air supply device (13), and the heat stored by the energy storage device (7) is used for heating the steam conveyed to the shaft seal by the shaft seal air supply device (13).
9. The heat integrated utilization system according to claim 1, wherein: the main steam turbine comprises an ultrahigh pressure cylinder (1), a high pressure cylinder (2), an intermediate pressure cylinder (3) and a low pressure cylinder (4), and 5 high pressure heaters are arranged in the high pressure heater group (10);
wherein, the steam inlet of the 1 st high-pressure heater comes from the steam exhaust of the ultra-high pressure cylinder (1) through a pipeline, the steam inlet of the 2 nd high-pressure heater and the 3 rd high-pressure heater comes from the steam exhaust of the high pressure cylinder (2) through a pipeline, the steam inlet of the 4 th high-pressure heater comes from the steam exhaust of the high pressure cylinder (2) through a pipeline, the steam inlet of the 5 th high-pressure heater comes from the steam exhaust of the medium pressure cylinder (3) through a pipeline, and the 1 st high-pressure heater is close to the boiler (6);
3 external steam coolers (8) are respectively arranged on pipelines of the 2 nd high-pressure heater, the 3 rd high-pressure heater and the high-pressure cylinder (2) and on pipelines of the 5 th high-pressure heater and the medium-pressure cylinder (3); the 3 external steam coolers (8) are connected in series and then connected in series with the energy storage device (7) to form an energy storage circulation system.
10. The heat integrated utilization system according to claim 1, wherein: the main steam turbine comprises an ultrahigh pressure cylinder (1), a high pressure cylinder (2), an intermediate pressure cylinder (3) and a low pressure cylinder (4), and 5 high pressure heaters are arranged in the high pressure heater group (10);
wherein, the steam inlet of the 1 st high-pressure heater comes from the steam exhaust of the ultra-high pressure cylinder (1) through a pipeline, the steam inlet of the 2 nd high-pressure heater and the 3 rd high-pressure heater comes from the steam exhaust of the high pressure cylinder (2) through a pipeline, the steam inlet of the 4 th high-pressure heater comes from the steam exhaust of the high pressure cylinder (2) through a pipeline, the steam inlet of the 5 th high-pressure heater comes from the steam exhaust of the medium pressure cylinder (3) through a pipeline, and the 1 st high-pressure heater is close to the boiler (6);
3 external steam coolers (8) are respectively arranged on pipelines of the 2 nd high-pressure heater, the 3 rd high-pressure heater and the high-pressure cylinder (2) and on pipelines of the 5 th high-pressure heater and the medium-pressure cylinder (3); the 3 external steam coolers (8) are connected in parallel and then connected in series with the energy storage device (7) to form an energy storage circulation system.
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| CN201810694517.3A CN108825317B (en) | 2018-06-29 | 2018-06-29 | Heat comprehensive utilization system |
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| CN201810694517.3A CN108825317B (en) | 2018-06-29 | 2018-06-29 | Heat comprehensive utilization system |
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| CN109736906A (en) * | 2018-12-20 | 2019-05-10 | 深圳万骍能源有限公司 | A kind of system promoting thermo-power station service efficiency |
| CN115788606A (en) * | 2022-12-15 | 2023-03-14 | 东方电气集团东方汽轮机有限公司 | Heat accumulating type shaft seal electric heating system and control method |
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| DE3110364A1 (en) * | 1980-11-13 | 1982-12-16 | Rudolf Dr. 6800 Mannheim Wieser | Steam power plant |
| DE102012215572A1 (en) * | 2012-09-03 | 2014-03-06 | Siemens Aktiengesellschaft | Device for rapid change of active power of power plants |
| CN105823077A (en) * | 2016-03-22 | 2016-08-03 | 西安交通大学 | Thermal power plant medium-low temperature flue gas heat energy gradient utilization system and method |
| CN107989667A (en) * | 2017-12-26 | 2018-05-04 | 华北电力大学 | Integrated supercritical CO2The coal-fired double reheat Turbo-generator Set of circulation |
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2018
- 2018-06-29 CN CN201810694517.3A patent/CN108825317B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3110364A1 (en) * | 1980-11-13 | 1982-12-16 | Rudolf Dr. 6800 Mannheim Wieser | Steam power plant |
| DE102012215572A1 (en) * | 2012-09-03 | 2014-03-06 | Siemens Aktiengesellschaft | Device for rapid change of active power of power plants |
| WO2014032827A1 (en) * | 2012-09-03 | 2014-03-06 | Siemens Aktiengesellschaft | Device for fast effective power change of power plant facilities |
| CN105823077A (en) * | 2016-03-22 | 2016-08-03 | 西安交通大学 | Thermal power plant medium-low temperature flue gas heat energy gradient utilization system and method |
| CN107989667A (en) * | 2017-12-26 | 2018-05-04 | 华北电力大学 | Integrated supercritical CO2The coal-fired double reheat Turbo-generator Set of circulation |
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