CN116412392A - Pressure-variable saturated water vapor storage device and vapor storage and release process - Google Patents
Pressure-variable saturated water vapor storage device and vapor storage and release process Download PDFInfo
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- CN116412392A CN116412392A CN202310294123.XA CN202310294123A CN116412392A CN 116412392 A CN116412392 A CN 116412392A CN 202310294123 A CN202310294123 A CN 202310294123A CN 116412392 A CN116412392 A CN 116412392A
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical class O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 66
- 238000000034 method Methods 0.000 title claims abstract description 10
- 230000008569 process Effects 0.000 title claims abstract description 10
- 230000001105 regulatory effect Effects 0.000 claims abstract description 33
- 238000007599 discharging Methods 0.000 claims abstract description 31
- 229920006395 saturated elastomer Polymers 0.000 claims abstract description 28
- 230000008020 evaporation Effects 0.000 claims abstract description 11
- 238000001704 evaporation Methods 0.000 claims abstract description 11
- 230000009467 reduction Effects 0.000 claims abstract description 5
- 238000013459 approach Methods 0.000 claims abstract description 4
- 230000001276 controlling effect Effects 0.000 claims abstract description 4
- 238000005516 engineering process Methods 0.000 description 7
- 150000003839 salts Chemical class 0.000 description 6
- 238000010276 construction Methods 0.000 description 4
- 230000008859 change Effects 0.000 description 2
- 238000005338 heat storage Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000009466 transformation Effects 0.000 description 2
- 230000003139 buffering effect Effects 0.000 description 1
- 238000005485 electric heating Methods 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22G—SUPERHEATING OF STEAM
- F22G5/00—Controlling superheat temperature
- F22G5/12—Controlling superheat temperature by attemperating the superheated steam, e.g. by injected water sprays
- F22G5/123—Water injection apparatus
- F22G5/126—Water injection apparatus in combination with steam-pressure reducing valves
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/14—Thermal energy storage
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- General Engineering & Computer Science (AREA)
- Filling Or Discharging Of Gas Storage Vessels (AREA)
Abstract
The invention relates to a pressure-variable saturated water vapor storage device and a vapor storage and release process. A plurality of high-pressure containers are connected in parallel between a gas filling pipe and a gas discharging pipe of the gas storage device, the inlet of the gas filling pipe is provided with a water inlet valve, and the outlet of the gas filling pipe is provided with a temperature reducing regulating valve; the outlet end of the steam discharging pipe is provided with a steam discharging regulating valve, a steam discharging pressure gauge and a desuperheater, and the steam charging pipe is connected with the desuperheater through the temperature reducing regulating valve. In the process aspect, when in steam filling, high-pressure steam is distributed to a steam filling interface pipe through a steam filling pipe by controlling the flow through a steam filling regulating valve and a steam filling flowmeter, enters a parallel high-pressure container, and is mixed with water in the container to be heated and boosted until the pressure is limited; when the steam is discharged, the steam discharge regulating valve is opened, high-pressure saturated water in the high-pressure pipe container generates flash steam due to pressure reduction, the flash steam is collected to the steam discharge pipe from the steam discharge interface pipe and discharged, and the saturated water after flash evaporation is left in the high-pressure container and is decompressed and evaporated along with continuous steam discharge until the pressure approaches to the steam supply pressure. The invention simplifies the system, has good running economy and is safe and reliable.
Description
Technical Field
The invention relates to the technical field of saturated water steam storage, in particular to a variable-pressure saturated water steam storage device for steam supply peak regulation of a thermal power plant and a steam storage and release process.
Background
When the thermal power plant supplies steam externally, obvious peak-valley load exists, and the steam supply in the daytime is large and the steam supply in the night is small. In order to match the steam consumption of the steam user, the thermal power plant needs to operate more units at high load in the daytime and shut down part of units at low load at night, so that more units are required to be built and started and stopped frequently, the construction investment is large, and the environmental protection capacity is limited.
If a set of steam storage system is additionally arranged, steam is stored at night under low load and discharged at daytime under high load, the peak load of the steam used by users can be met under the condition that the boiler unit is not increased, the economic load can be kept at night, and the construction investment is much lower. However, the density of the steam is low, the capacity of the steam stored by directly using a pressure tank is relatively small, and the production requirement is difficult to meet.
Among them, the molten salt heat storage technology and the saturated water flash evaporation technology are two energy storage technologies with practical feasibility at present. The heat storage of the molten salt is to use high-temperature molten salt to exchange heat with water to generate steam, so that the safety is high, but the reliability is low. The sensible heat of molten salt is stored, a huge amount of molten salt is needed, and the investment is large. The temperature of the molten salt is very high, and the temperature can be increased only by electric heating, so that the economical efficiency is poor.
The saturated water flash evaporation and steam storage technology is a phase change steam storage technology, and the steam storage capacity is large. The pressure tank is used for storing high-pressure saturated water, and the high-pressure saturated water is sprayed into the flash tank for flash evaporation when steam is needed, so that the high-pressure saturated water cannot be used for externally supplying steam in a thermal power plant due to the capacity of the high-pressure container, and only a small amount of the high-pressure saturated water is applied to instantaneous load buffering of a steam turbine at present.
Another problem with saturated water flash evaporation and steam storage technology is that the low pressure saturated water flow rate after flash evaporation is very large, if the low pressure saturated water flow rate is returned to the boiler system, the efficiency and the operation stability of the boiler are deteriorated, the economical efficiency and the safety of the boiler are caused, and a pressure vessel with large capacity is required for independent storage, so that the low pressure saturated water flow rate is very uneconomical. Therefore, the high-capacity steam storage technology with good economy, safety and reliability is a key for solving the peak regulation of steam supply of the thermal power plant.
Disclosure of Invention
Aiming at the problems, the invention provides the pressure-variable saturated water vapor storage device and the vapor storage and release process, which can realize high-capacity high-pressure vapor storage, have simple and reliable system, low construction cost and good running economy, and can meet the requirements of peak regulation of the vapor supply load of a thermal power plant.
The invention adopts the following technical scheme: the pressure-variable saturated water vapor storage device comprises a vapor filling pipe and a vapor discharging pipe, and is characterized in that a plurality of high-pressure containers are connected in parallel between the vapor filling pipe and the vapor discharging pipe, a water inlet valve is arranged at the inlet position of the vapor filling pipe, and a temperature reducing regulating valve is arranged at the outlet of the vapor filling pipe; the outlet end of the steam discharging pipe is provided with a steam discharging regulating valve, a steam discharging pressure gauge and a desuperheater, and the steam charging pipe is connected with the desuperheater through the temperature reducing regulating valve.
Preferably, the high-pressure vessel is a vertically arranged tubular high-pressure vessel.
Preferably, the gas filling pipe is connected with the inlet of the high-pressure container through a gas filling interface pipe, and the outlet of the high-pressure container is connected with the gas discharging pipe through a gas discharging interface pipe.
Preferably, the inlet section of the air charging pipe is provided with an air charging regulating valve and an air charging flowmeter.
Preferably, a water level gauge is arranged at the side part of any one of the high-pressure containers, and only one water level gauge is needed in the whole system.
Preferably, the steam discharging pipe is also provided with a steam discharging thermometer.
Preferably, a steam supply thermometer, a steam supply pressure gauge and a steam supply check valve are further arranged on a steam release pipe at the rear end of the desuperheater.
Preferably, a temperature reducing regulating valve is further arranged on a rear-end steam discharging pipe connected with the attemperator, and saturated water of the high-pressure container is sprayed with water to reduce temperature by means of self pressure.
The invention also discloses a steam storage and release process, which is characterized in that during steam filling, high-pressure steam is distributed to a steam filling interface pipe through a steam filling pipe by controlling the flow through a steam filling regulating valve and a steam filling flowmeter, enters a parallel high-pressure container, and is mixed with water in the container, heated and boosted until the pressure is limited; when the steam is discharged, the steam discharge regulating valve is opened, high-pressure saturated water in the high-pressure container generates flash steam due to pressure reduction, the flash steam is collected to the steam discharge pipe from the steam discharge interface pipe and discharged, and the saturated water after flash evaporation is left in the high-pressure container and is reduced in pressure and evaporated along with continuous steam discharge until the pressure approaches to the steam supply pressure.
The invention adopts the combination of transformation and phase transformation and the parallel connection of the high-pressure container for storing the steam, and can realize high-capacity high-pressure steam storage, wherein the high-pressure container is not only a steam storage tank, but also a flash evaporation tank and a water storage tank. The flash tank and the water storage tank are not required to be arranged independently, so that the system is simplified, the construction cost is low, the operation economy is good, the safety and reliability are realized, and the load peak regulation requirement of steam supply of the thermal power plant can be met.
Drawings
Fig. 1 is a schematic structural view of the present invention.
In the figure: 1. the system comprises a steam supply check valve, a steam supply thermometer, a steam supply pressure gauge, a desuperheater, a steam discharge regulating valve, a steam discharge pressure gauge, a high-pressure container, a steam discharge pipe, a steam discharge interface pipe, a steam discharge thermometer, a water level gauge, a steam charging regulating valve, a steam charging flowmeter, a steam charging valve, a steam charging interface pipe, a steam charging pipe and a temperature reducing regulating valve.
Detailed Description
The invention will be further illustrated with reference to specific examples.
The pressure-variable saturated water vapor storage device shown in fig. 1 comprises a vapor supply check valve 1, a vapor supply thermometer 2, a vapor supply pressure gauge 3, a desuperheater 4, a vapor discharge regulating valve 5, a vapor discharge pressure gauge 6, a high-pressure container 7, a vapor discharge pipe 8, a vapor discharge interface pipe 9, a vapor discharge thermometer 10, a water level gauge 11, a vapor filling regulating valve 12, a vapor filling flowmeter 13, a water inlet valve 14, a vapor filling interface pipe 15, a vapor filling pipe 16 and a temperature reduction regulating valve 17.
According to the requirement of the gas storage quantity, a plurality of high-pressure pipe containers 7 which are vertically connected in parallel are arranged. The upper surface of the high-pressure tube container 7 is communicated with the steam discharging tube 8 through the steam discharging interface tube 9, and the lower surface is communicated with the steam charging tube 16 through the steam charging interface tube 15.
The bottom of the air charging pipe is provided with a water inlet valve 14, and the outlet is provided with a temperature reducing regulating valve 17; the outlet end of the steam discharging pipe 8 is provided with a steam discharging regulating valve 5, a steam discharging pressure gauge 6 and a desuperheater 4, and the steam charging pipe 16 is connected with the desuperheater 4 through a temperature reducing regulating valve 17.
In one embodiment, the high pressure vessel 7 is a vertically arranged tubular high pressure vessel. The steam storage capacity of a plurality of parallel tubular high-pressure containers can be quite large, the containers are directly manufactured by large-caliber high-pressure pipelines, and the cost is relatively low.
Specifically, a steam charging adjusting valve 12 and a steam charging flowmeter 13 are arranged on the steam charging pipe 16 and positioned at the rear part of the water inlet valve 14. And the real-time flow can be conveniently observed and regulated according to the requirement.
Specifically, a water level gauge 11 is provided on the side of any one of the high-pressure tanks 7. When the device is put into operation for the first time, a certain amount of deoxidized water is filled through the water inlet valve 14, and the water amount is controlled by the water level gauge 11.
In order to monitor the operation condition of the steam storage device, a steam discharge thermometer 10 and a pressure gauge 6 are also arranged on the steam discharge pipe 8.
Specifically, a steam supply thermometer 2, a steam supply pressure gauge 3 and a steam supply check valve 1 are also arranged on a steam release pipe 8 at the rear end of the desuperheater 4. The system can monitor various parameters of steam supply in real time, and a check valve is arranged to prevent steam from flowing back.
Specifically, a temperature reducing regulating valve is further arranged on a rear-end steam discharging pipe connected with the desuperheater, and saturated water of the high-pressure container is sprayed with water to reduce the temperature by means of self pressure.
The process for filling and discharging the steam by using the steam storage device comprises the following steps:
during the steam filling, the flow of the high-pressure steam is controlled by the steam filling regulating valve 12 and the steam filling flowmeter 13, the high-pressure steam enters the high-pressure pipe container 7 from the steam filling pipe 16 through the steam filling interface pipe 15, and is mixed with the reserved deoxygenated water for heating to boost the pressure until the pressure of the high-pressure pipe container 7 is limited, so that the steam storage is completed.
When the steam is discharged, the steam discharge regulating valve 5 is opened, and saturated water in the high-pressure container 7 is evaporated due to pressure drop. Flash steam enters the steam release regulating valve 5 through the steam release interface pipe 9 and the steam release pipe 8 to become low-pressure superheated steam to enter the desuperheater 4, then enters the steam supply pipe network through the steam supply check valve 1 after the flash steam is subjected to the spray temperature reduction of high-pressure saturated water from the high-pressure pipe container 7 to become low-pressure saturated steam or micro superheated steam.
Along with the continuous proceeding of the steam release, the pressure of the saturated water is continuously reduced until the pressure approaches the steam supply pressure, and the steam release is completed. And then, the gas filling and discharging process is circularly reciprocated.
The invention replaces a large-sized high-pressure container with the parallel combination of the high-pressure containers, and has low manufacturing cost; the phase change stored steam is equivalent to liquefied stored steam, and the stored steam quantity is large.
By controlling the flow of the gas filling and discharging, the gas storage, the flash evaporation and the water storage are completed in the same container, the storage of the flash evaporation saturated water in different tanks is avoided, the system is simplified, the electric power is saved, and the economical efficiency is improved. The invention is convenient for popularization and application in thermal power plants.
It is to be understood that these examples are illustrative of the present invention and are not intended to limit the scope of the present invention. Further, it is understood that various changes and modifications may be made by those skilled in the art after reading the teachings of the present invention, and such equivalents are intended to fall within the scope of the claims appended hereto.
Claims (9)
1. The pressure-variable saturated water vapor storage device comprises a vapor filling pipe (16) and a vapor discharging pipe (8), and is characterized in that a plurality of high-pressure containers (7) are connected in parallel between the vapor filling pipe and the vapor discharging pipe, the inlet of the vapor filling pipe is provided with a water inlet valve (14), and the outlet of the vapor filling pipe is provided with a temperature-reducing regulating valve (17); the outlet end of the steam discharging pipe (8) is provided with a steam discharging regulating valve (5), a steam discharging pressure gauge (6) and a desuperheater (4), and the steam charging pipe (16) is connected with the desuperheater (4) through a temperature reducing regulating valve (17).
2. A pressure-variable saturated water vapour storage device according to claim 1, characterized in that the high-pressure vessel (7) is a vertically arranged tubular high-pressure vessel.
3. The pressure-variable saturated water vapor storage device according to claim 1 or 2, characterized in that the vapor filling pipe (16) is connected with the inlet of the high-pressure container (7) through a vapor filling interface pipe (15), and the outlet of the high-pressure container (7) is connected with the vapor discharging pipe (8) through a vapor discharging interface pipe (9).
4. A pressure-variable saturated water storage device according to claim 3, characterized in that the inlet section of the gas filling pipe (16) is provided with a gas filling regulating valve (12) and a gas filling flowmeter (13).
5. The pressure-variable saturated water vapor storage device according to claim 4, wherein a water level gauge (11) is arranged at the side part of any one high-pressure container (7).
6. The pressure-variable saturated water vapor storage device according to claim 5, wherein a vapor discharge thermometer (10) is further arranged on the vapor discharge pipe (8).
7. The pressure-variable saturated water vapor storage device according to claim 6, wherein a vapor supply thermometer (2), a vapor supply pressure gauge (3) and a vapor supply check valve (1) are further arranged on a vapor discharge pipe (8) at the rear end of the desuperheater (4).
8. The pressure-variable saturated water vapor storage device according to claim 7 is characterized in that a temperature-reducing regulating valve is further arranged on a rear-end vapor discharge pipe (8) connected with the attemperator (4), and saturated water in the high-pressure container (7) is sprayed with water for reducing temperature by means of self pressure.
9. A process for storing and discharging steam of a steam storing device as claimed in claim 8, wherein during steam charging, high pressure steam is distributed to a steam charging interface pipe through a steam charging pipe by controlling flow through a steam charging regulating valve and a steam charging flowmeter, enters a parallel high pressure container, and is mixed with water in the container, heated and boosted until the pressure is limited; when the steam is discharged, the steam discharge regulating valve is opened, high-pressure saturated water in the high-pressure pipe container generates flash steam due to pressure reduction, the flash steam is collected to the steam discharge pipe from the steam discharge interface pipe and discharged, and the saturated water after flash evaporation is left in the high-pressure container and is decompressed and evaporated along with continuous steam discharge until the pressure approaches to the steam supply pressure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310294123.XA CN116412392A (en) | 2023-03-24 | 2023-03-24 | Pressure-variable saturated water vapor storage device and vapor storage and release process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310294123.XA CN116412392A (en) | 2023-03-24 | 2023-03-24 | Pressure-variable saturated water vapor storage device and vapor storage and release process |
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| Publication Number | Publication Date |
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| CN116412392A true CN116412392A (en) | 2023-07-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202310294123.XA Pending CN116412392A (en) | 2023-03-24 | 2023-03-24 | Pressure-variable saturated water vapor storage device and vapor storage and release process |
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| CN (1) | CN116412392A (en) |
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- 2023-03-24 CN CN202310294123.XA patent/CN116412392A/en active Pending
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