CN111810261A - Condensing unit peak regulation system - Google Patents
Condensing unit peak regulation system Download PDFInfo
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- CN111810261A CN111810261A CN202010616817.7A CN202010616817A CN111810261A CN 111810261 A CN111810261 A CN 111810261A CN 202010616817 A CN202010616817 A CN 202010616817A CN 111810261 A CN111810261 A CN 111810261A
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 42
- 238000009825 accumulation Methods 0.000 claims abstract description 14
- 238000010438 heat treatment Methods 0.000 claims abstract description 10
- 239000003657 drainage water Substances 0.000 claims abstract 2
- 238000000605 extraction Methods 0.000 claims description 20
- 230000001105 regulatory effect Effects 0.000 claims description 14
- 238000005338 heat storage Methods 0.000 claims description 12
- 230000001172 regenerating effect Effects 0.000 claims description 2
- 238000010248 power generation Methods 0.000 description 8
- 238000010586 diagram Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000002209 hydrophobic effect Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Classifications
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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
- F01K13/02—Controlling, e.g. stopping or starting
-
- 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
- F01K7/00—Steam engine plants characterised by the use of specific types of engine; Plants or engines characterised by their use of special steam systems, cycles or processes; Control means specially adapted for such systems, cycles or processes; Use of withdrawn or exhaust steam for feed-water heating
- F01K7/34—Steam engine plants characterised by the use of specific types of engine; Plants or engines characterised by their use of special steam systems, cycles or processes; Control means specially adapted for such systems, cycles or processes; Use of withdrawn or exhaust steam for feed-water heating the engines being of extraction or non-condensing type; Use of steam for feed-water heating
- F01K7/38—Steam engine plants characterised by the use of specific types of engine; Plants or engines characterised by their use of special steam systems, cycles or processes; Control means specially adapted for such systems, cycles or processes; Use of withdrawn or exhaust steam for feed-water heating the engines being of extraction or non-condensing type; Use of steam for feed-water heating the engines being of turbine type
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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
- F01K7/00—Steam engine plants characterised by the use of specific types of engine; Plants or engines characterised by their use of special steam systems, cycles or processes; Control means specially adapted for such systems, cycles or processes; Use of withdrawn or exhaust steam for feed-water heating
- F01K7/34—Steam engine plants characterised by the use of specific types of engine; Plants or engines characterised by their use of special steam systems, cycles or processes; Control means specially adapted for such systems, cycles or processes; Use of withdrawn or exhaust steam for feed-water heating the engines being of extraction or non-condensing type; Use of steam for feed-water heating
- F01K7/44—Use of steam for feed-water heating and another purpose
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22D—PREHEATING, OR ACCUMULATING PREHEATED, FEED-WATER FOR STEAM GENERATION; FEED-WATER SUPPLY FOR STEAM GENERATION; CONTROLLING WATER LEVEL FOR STEAM GENERATION; AUXILIARY DEVICES FOR PROMOTING WATER CIRCULATION WITHIN STEAM BOILERS
- F22D1/00—Feed-water heaters, i.e. economisers or like preheaters
- F22D1/32—Feed-water heaters, i.e. economisers or like preheaters arranged to be heated by steam, e.g. bled from turbines
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22D—PREHEATING, OR ACCUMULATING PREHEATED, FEED-WATER FOR STEAM GENERATION; FEED-WATER SUPPLY FOR STEAM GENERATION; CONTROLLING WATER LEVEL FOR STEAM GENERATION; AUXILIARY DEVICES FOR PROMOTING WATER CIRCULATION WITHIN STEAM BOILERS
- F22D1/00—Feed-water heaters, i.e. economisers or like preheaters
- F22D1/32—Feed-water heaters, i.e. economisers or like preheaters arranged to be heated by steam, e.g. bled from turbines
- F22D1/325—Schematic arrangements or control devices therefor
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Heat-Pump Type And Storage Water Heaters (AREA)
Abstract
The invention relates to a peak shaving system of a condensing unit, which comprises a cylinder, a high-pressure heater, a deaerator and a heat accumulator, wherein the heat accumulator is connected with the steam side of the high-pressure heater in parallel during heat accumulation, high-pressure steam which is output by the cylinder and flows to the high-pressure heater is divided into an A path and a B path, the A path is used for heating a heat accumulation medium in the heat accumulator, the B path is used for heating the high-pressure heater, drainage water of the heat accumulator and the high-pressure heater flows to the deaerator, the heat accumulator is connected with the water side of the high-pressure heater in parallel during heat release, boiler water supply is divided into C, D paths, the C path passes through the heat accumulator and absorbs heat of the heat accumulation medium, the D path passes through the high-pressure heater and absorbs heat of. Compared with the prior art, the invention has the advantages of high load response speed, simple structure and the like.
Description
Technical Field
The invention relates to a peak regulation technology of a condensing steam turbine unit, in particular to a peak regulation system of a condensing steam turbine unit.
Background
With the increasing environmental protection requirement, the proportion of renewable energy sources such as wind energy, solar energy and the like in power generation in China increases year by year. However, wind power and photoelectric output have the characteristics of intermittence, randomness, volatility and the like, impact is easily generated on stable operation of a power grid, and the influence is larger when the proportion is higher. In order to ensure the stable operation of the power grid, the peak regulation capacity of the conventional thermal power generating unit must be improved. The low-load operation of the thermal power generating unit in China is a commonly-adopted peak shaving mode, but most of the low-load operation is not less than 50% limited by the minimum technical output of a boiler, otherwise, the coal consumption of the unit is rapidly increased, the economy is rapidly reduced, the combustion and hydrodynamic circulation of the boiler tend to be unstable, and the safety of the unit is obviously influenced.
The heat storage technology is a better peak regulation means, is mostly used in the operation of thermoelectric decoupling peak regulation of a cogeneration unit at present, has less conditions of being applied to a condensing unit, and is also long in time consumption, slow in load response speed and high in system investment cost by being used for storing and releasing high-temperature heat energy at a steam level.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide the condensing unit peak regulation system which is high in load response speed and simple in structure.
The purpose of the invention can be realized by the following technical scheme:
the utility model provides a condensing unit peak regulation system, includes cylinder, high pressure feed water heater, oxygen-eliminating device and heat accumulator, the heat accumulator is parallelly connected with high pressure feed water heater's vapour side during the heat accumulation, and the high pressure extraction that is exported and flows to high pressure feed water heater by the cylinder divide into A way and B way, A way be used for heating the heat accumulation medium in the heat accumulator, B way be used for heating high pressure feed water heater, A way be equipped with extraction steam flow control valve, extraction steam flow control valve is connected with the controller, the hydrophobic flow direction oxygen-eliminating device of heat accumulator and high pressure feed water heater during exothermic, the water side of heat accumulator and high pressure feed water heater is parallelly connected, boiler feedwater divide into C way and D way, C way is through the heat accumulator and absorb the heat of heat accumulation medium, D way is through high pressure feed water heater and absorb the heat of backheat extraction, C way and D way after entering boiler, C way be equipped with, the feed water flow regulating valve is connected with a controller.
Furthermore, the number of the high-pressure heaters is 1 or more, the heat accumulator is connected with the steam side of any 1 high-pressure heater in parallel during heat storage, and high-pressure extracted steam output by the cylinder during heat storage flows to any 1 or more high-pressure heaters.
Further, the heat accumulator is connected in parallel with the water side of any 1 or more high-pressure heaters during heat release, and the D path passes through any 1 or more high-pressure heaters.
Further, the cylinder comprises a high-pressure cylinder and an intermediate-pressure cylinder, and the high-pressure steam extraction of the path A is output by the high-pressure cylinder or the intermediate-pressure cylinder, namely the path A can be output by any high-pressure steam extraction.
Compared with the prior art, the invention has the following beneficial effects:
(1) the invention connects the heat accumulator in parallel with the steam side of the high pressure heater during heat accumulation, the high pressure steam from the cylinder and flowing to the high pressure heater is divided into A, B two paths, the A path is used for heating the heat accumulation medium in the heat accumulator, the B path is used for heating the boiler water supply in the high pressure heater, the drain water of the heat accumulator and the high pressure heater flows to the deaerator, the heat accumulator is connected in parallel with the water side of the high pressure heater during heat accumulation, the boiler water supply is divided into C, D two paths, the C path passes through the heat accumulator and absorbs the heat of the heat accumulation medium, the D path passes through the high pressure heater and absorbs the heat of the regenerative steam extraction, the C path and the, the high-pressure steam extraction device can store heat for the high-pressure steam extraction in the high-pressure cylinder or the medium-pressure cylinder in the power generation valley, release heat in the heat accumulator in the power generation peak to increase the power generation of the unit, improve the peak regulation capacity of the gas condensation type unit, and has the advantages of simple structure and high load response speed;
(2) the invention is provided with the steam extraction flow regulating valve on the A path and the water supply flow regulating valve on the C path, the number of the control regulating valves is small, and the regulation is flexible.
Drawings
Fig. 1 is a structural diagram of a peak shaving system of a condensing unit in embodiment 1;
FIG. 2 is a diagram showing the peak shaving system of the condensing unit in embodiment 2
FIG. 3 is a schematic diagram of the peak shaving system of the condensing unit in embodiment 3
FIG. 4 is a schematic diagram of the peak shaving system of the condensing unit in embodiment 4
The reference numbers in the figures illustrate:
1. the system comprises a high-pressure cylinder, a middle-pressure cylinder, a deaerator, a third high-pressure heater, a second high-pressure heater, a water supply flow regulating valve, a heat accumulator, a first high-pressure heater and a steam extraction flow regulating valve, wherein the high-pressure cylinder comprises 2, the middle-pressure cylinder comprises 3, the deaerator, a third high-pressure heater comprises 4, the second high-pressure heater comprises 5, the water supply flow regulating valve.
Detailed Description
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, not all, embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, shall fall within the scope of protection of the present invention.
Example 1
A peak regulation system of a condensing unit comprises a high-pressure cylinder 1, a medium-pressure cylinder 2, a third high-pressure heater 4, a second high-pressure heater 5, a first high-pressure heater 8, a deaerator 3 and a heat accumulator 7, wherein the third high-pressure heater 4, the second high-pressure heater 5 and the first high-pressure heater 8 are sequentially connected, the high-pressure cylinder 1 and the medium-pressure cylinder 2 are mutually connected, steam of a boiler superheater enters the high-pressure cylinder 1, steam of a boiler reheater enters the medium-pressure cylinder 2, and a heat storage medium in the heat accumulator 7 is molten salt;
the heat accumulator 7 is connected in parallel with the steam side of the first high-pressure heater 8 during heat storage, high-pressure steam which is output from the high-pressure cylinder 1 and flows to the first high-pressure heater 8 is divided into A, B paths, the A path is used for heating a heat storage medium in the heat accumulator 7, the B path is used for heating boiler feed water in the first high-pressure heater 8, drain water of the heat accumulator 7 flows to the second high-pressure heater 5, drain water of the first high-pressure heater 8 flows to the second high-pressure heater 5, drain water of the second high-pressure heater 5 flows to the third high-pressure heater 4, drain water of the third high-pressure heater 4 flows to the deaerator 3, the A path is provided with a steam extraction flow regulating valve 9, the steam extraction flow regulating valve 9 is connected with a controller, and the controller adjusts the opening degree of the steam extraction;
the heat accumulator 7 is connected with the water sides of the first high-pressure heater 8, the second high-pressure heater 5 and the third high-pressure heater 4 in parallel during heat release, boiler feed water at the inlet of the third high-pressure heater 4 is divided into C, D paths, the path C passes through the heat accumulator 7 and absorbs heat of a heat storage medium, the path C is provided with a feed water flow regulating valve 6, the feed water flow regulating valve 6 is connected with a controller, the opening degree of the feed water flow regulating valve 6 is regulated according to the requirement of unit peak regulation during heat release, the path D sequentially passes through the third high-pressure heater 4, the second high-pressure heater 5 or the first high-pressure heater 8, and the path C and the path D are converged and.
The system is applied to a 600MW supercritical unit, on the premise of not changing a steam extraction pipeline of a steam turbine, the maximum heat storage capacity can reach 154.354MW when the load is 50%, the power generation power of the steam turbine generator unit can be reduced by 61.031MW, the power generation load is reduced to 39.83%, and the load can be increased by 23.365MW when the load is increased. When the boiler load is 40%, the maximum heat storage amount can reach 60.036MW, the power generation power of the steam turbine generator set can be reduced by 25.113MW, the power generation load is reduced to 35.81%, the load can be increased by 12.611MW when the load is increased, and the load response speed is the same as the feed water frequency modulation when the load is increased.
Example 2
In this embodiment, as shown in fig. 2, the regenerator 7 for heat release during heat storage is connected in parallel to the water side of the first high-pressure heater 8, and the boiler feed water at the inlet of the first high-pressure heater 8 is divided into C, D two paths, which is otherwise the same as in embodiment 1.
Example 3
In the present embodiment, as shown in fig. 3, the high-pressure extraction steam and the exhaust air flowing to the second high-pressure heater 5 are divided into A, B two paths, the drain water of the regenerator 7 during heat accumulation flows to the third high-pressure heater 4, the regenerator 7 during heat release is connected in parallel to the water side of the second high-pressure heater 5, and the boiler feed water at the inlet of the second high-pressure heater 5 is divided into C, D two paths, which is otherwise the same as in embodiment 1.
Example 4
In the present embodiment, as shown in fig. 4, the high-pressure bleed air flowing to the third high-pressure heater 4 is divided into A, B, the drain water of the regenerator 7 flows to the deaerator 3, and the regenerator 7 is connected in parallel to the water side of the third high-pressure heater 4 during heat release, and the rest is the same as that in embodiment 1.
While the invention has been described with reference to specific embodiments, the invention is not limited thereto, and various equivalent modifications and substitutions can be easily made by those skilled in the art within the technical scope of the invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. A peak regulation system of a condensing unit comprises a cylinder, a high-pressure heater, a deaerator (3) and a heat accumulator (7), and is characterized in that,
the heat accumulator (7) is connected with the steam side of the high-pressure heater in parallel during heat storage, the high-pressure steam which is output by the cylinder and flows to the high-pressure heater is divided into a path A and a path B, the path A is used for heating a heat storage medium in the heat accumulator (7), the path B is used for heating the high-pressure heater, the drainage water of the heat accumulator (7) and the high-pressure heater flows to the deaerator (3),
when heat is released, the heat accumulator (7) is connected with the water side of the high-pressure heater in parallel, boiler feed water is divided into C, D paths, the path C passes through the heat accumulator (7) and absorbs heat of a heat accumulation medium, the path D passes through the high-pressure heater and absorbs heat of regenerative steam extraction, and the path C and the path D are converged and then enter the boiler.
2. The peak shaving system of the condensing unit according to claim 1, wherein the number of the high-pressure heaters is 1 or more.
3. The peak shaving system for a condensing unit according to claim 2, characterized in that the heat accumulator (7) is connected in parallel with the steam side of any 1 high-pressure heater during heat accumulation.
4. The peak shaving system according to claim 2, wherein the high pressure extraction steam output by the cylinder during heat accumulation flows to any 1 or more high pressure heaters.
5. The peak shaving system of the condensing unit according to claim 2, characterized in that the heat accumulator (7) is connected in parallel with the water side of any 1 or more high-pressure heaters during heat release.
6. The peak shaving system of the condensing unit according to claim 5, wherein the path D passes through any 1 or more high-pressure heaters during heat release.
7. The peak shaving system for a condensing unit according to claim 1, characterized in that the path a is provided with an extraction flow control valve (9).
8. The peak shaving system for the condensing unit according to claim 1, wherein the C path is provided with a feed water flow regulating valve (6).
9. A condensing unit peak shaving system according to claim 1, characterized in that the cylinders comprise a high pressure cylinder (1) and a medium pressure cylinder (2).
10. The peak shaving system of the condensing unit according to claim 9, wherein the high pressure extraction steam of the path a is output by the high pressure cylinder (1) or the medium pressure cylinder (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010616817.7A CN111810261A (en) | 2020-06-30 | 2020-06-30 | Condensing unit peak regulation system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010616817.7A CN111810261A (en) | 2020-06-30 | 2020-06-30 | Condensing unit peak regulation system |
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| CN111810261A true CN111810261A (en) | 2020-10-23 |
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| CN202010616817.7A Pending CN111810261A (en) | 2020-06-30 | 2020-06-30 | Condensing unit peak regulation system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113137288A (en) * | 2021-04-30 | 2021-07-20 | 上海电力大学 | Thermodynamic system of multi-stage heat storage peak regulation of condensing unit |
| CN117329504A (en) * | 2023-08-28 | 2024-01-02 | 暨南大学 | Water supply heat accumulating type thermal generator set adjusting system, design method and operation method |
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| GB1407531A (en) * | 1972-07-13 | 1975-09-24 | Babcock Atlantique Sa | Steam power stations |
| CN108548168A (en) * | 2018-03-20 | 2018-09-18 | 北京工业大学 | A kind of thermal power plant's fused salt accumulation of heat peak regulation system heated using main steam |
| CN208982124U (en) * | 2018-08-28 | 2019-06-14 | 华电电力科学研究院有限公司 | The heat and power system of unit fast lifting load is realized in a kind of combination heat supply |
| CN209558305U (en) * | 2018-11-21 | 2019-10-29 | 赫普科技发展（北京）有限公司 | Vapour vapor extractor combination thermal storage electric boiler peak regulation system is penetrated by a kind of thermal power plant |
| CN209688799U (en) * | 2019-08-27 | 2019-11-26 | 新疆中海明达能源有限公司 | A kind of system that electric heat storage boiler cooperation Direct Air-cooled Unit participates in depth peak regulation |
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2020
- 2020-06-30 CN CN202010616817.7A patent/CN111810261A/en active Pending
Patent Citations (5)
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|---|---|---|---|---|
| GB1407531A (en) * | 1972-07-13 | 1975-09-24 | Babcock Atlantique Sa | Steam power stations |
| CN108548168A (en) * | 2018-03-20 | 2018-09-18 | 北京工业大学 | A kind of thermal power plant's fused salt accumulation of heat peak regulation system heated using main steam |
| CN208982124U (en) * | 2018-08-28 | 2019-06-14 | 华电电力科学研究院有限公司 | The heat and power system of unit fast lifting load is realized in a kind of combination heat supply |
| CN209558305U (en) * | 2018-11-21 | 2019-10-29 | 赫普科技发展（北京）有限公司 | Vapour vapor extractor combination thermal storage electric boiler peak regulation system is penetrated by a kind of thermal power plant |
| CN209688799U (en) * | 2019-08-27 | 2019-11-26 | 新疆中海明达能源有限公司 | A kind of system that electric heat storage boiler cooperation Direct Air-cooled Unit participates in depth peak regulation |
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| 凌默侬等: "储热装置释能方式对供热机组的性能影响", 《机械与电子》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113137288A (en) * | 2021-04-30 | 2021-07-20 | 上海电力大学 | Thermodynamic system of multi-stage heat storage peak regulation of condensing unit |
| CN117329504A (en) * | 2023-08-28 | 2024-01-02 | 暨南大学 | Water supply heat accumulating type thermal generator set adjusting system, design method and operation method |
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