CN218379356U - Quick reinforced working medium side energy supply system for supercritical or ultra-supercritical boiler - Google Patents
Quick reinforced working medium side energy supply system for supercritical or ultra-supercritical boiler Download PDFInfo
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- CN218379356U CN218379356U CN202220841695.6U CN202220841695U CN218379356U CN 218379356 U CN218379356 U CN 218379356U CN 202220841695 U CN202220841695 U CN 202220841695U CN 218379356 U CN218379356 U CN 218379356U
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Abstract
The utility model relates to an energy technical field's supercritical or ultra supercritical boiler strengthens working medium side energy supply system fast, include: the circulating water path is matched with the boiler and is communicated with an input pipeline and an output pipeline; the steam-water separator is communicated with an output pipeline of the circulating water path; the water storage tank is communicated with the steam-water separator; a high temperature furnace water energy storage device with a storage cavity; the steam cavity of the steam-water separator and the liquid cavity of the water storage tank are connected with the input side of the high-temperature furnace water energy storage device through the energy storage pipeline; the energy releasing pipeline can be opened and closed, and the energy releasing side of the high-temperature furnace water energy storing device is connected with the input pipeline of the circulating water channel through the energy releasing pipeline. The rapid peak regulation and variable load response capability of the supercritical (super) boiler can be enhanced from the working medium side.
Description
Technical Field
The utility model relates to an energy technical field particularly, is that supercritical or ultra supercritical boiler strengthens working medium side energy supply system fast.
Background
The variable load rate of the traditional thermal generator set is generally 1.0% -1.5% of rated load/min, and the maximum variable load rate can reach 2.0% of rated load/min. However, a new power system mainly using renewable energy sources puts higher requirements (5.0% -8.0% rated load/minute) on the peak regulation rate of a thermal power generating unit in the future, while the conventional thermal power generating unit still cannot meet the requirements on the variable load rate at present, and the key for solving the problem is to realize the rapid energy supply of the thermal power generating unit boiler, so that how to realize the rapid load change capability and the response rate of the thermal power generating unit boiler, and realizing the rapid and flexible peak regulation of the thermal power generating unit boiler is a problem to be urgently solved at present.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a working medium side energy supply system is reinforceed fast to supercritical or ultra supercritical boiler can strengthen super (super) supercritical boiler fast peak shaving and variable load response ability from the working medium side.
The purpose of the utility model is realized like this: super supercritical or super supercritical boiler strengthens working medium side energy supply system fast, includes:
the circulating waterway is matched with the boiler and is communicated with an input pipeline and an output pipeline;
the steam-water separator is communicated with an output pipeline of the circulating water path;
the water storage tank is communicated with the steam-water separator;
a high temperature furnace water energy storage device with a storage cavity;
the steam cavity of the steam-water separator and the liquid cavity of the water storage tank are connected with the input side of the high-temperature furnace water energy storage device through the energy storage pipeline;
the high-temperature furnace water energy storage device comprises a high-temperature furnace water energy storage device, an energy release pipeline and a circulating water channel, wherein the high-temperature furnace water energy storage device is arranged in the high-temperature furnace water energy storage device, and the high-temperature furnace water energy storage device is arranged in the circulating water channel.
Furthermore, the number of the energy storage pipelines is two, and the steam cavity of the steam-water separator and the liquid cavity of the water storage tank are respectively connected with the high-temperature furnace water energy storage device through the two energy storage pipelines.
Furthermore, a valve seventh is arranged in an energy storage pipeline connecting a steam cavity of the steam-water separator and the high-temperature furnace water energy storage device, a valve first is arranged in an energy storage pipeline connecting a liquid cavity of the water storage tank and the high-temperature furnace water energy storage device, and the valve first and the valve seventh are in an opening state in an energy storage stage, so that the steam cavity of the steam-water separator and the liquid cavity of the water storage tank are communicated with the storage cavity of the high-temperature furnace water energy storage device through the energy storage pipeline.
Furthermore, the energy release pipeline is provided with a second valve and a mixer which are sequentially distributed, the second valve is in an open state during the period of fast load rising and peak load regulation, the input side of the mixer is also connected with an input pipeline and is connected with the input pipeline of the circulating water path through the input pipeline, a fourth valve is arranged in the input pipeline, and the input pipeline of the circulating water path is communicated with the input side of the mixer when the fourth valve is in the open state.
Further, the energy release pipeline is also provided with a furnace water circulating water pump which is in an open state during the period of needing rapid load rising and peak load regulation, and the suction end of the furnace water circulating water pump is communicated with the output side of the mixer.
Further, the energy release pipeline is also provided with a valve five which is in an opening state during the period of needing rapid load-rising peak load regulation, and the valve five is arranged on the pump-out side of the furnace water circulating water pump.
Furthermore, an input pipeline of the circulating water path is provided with an economizer, a branch is arranged at the outlet end of the furnace water circulating water pump to be communicated with the input pipeline of the circulating water path, and the inlet end of the economizer is communicated with the outlet end of the furnace water circulating water pump.
Furthermore, the input pipeline of the circulating water channel comprises a water feeding pump, a valve six and a check valve which are sequentially arranged, and an access point of the input side of the mixer and the input pipeline of the circulating water channel is positioned between the valve six and the check valve.
Furthermore, the steam-water separator, the water storage tank, the high-temperature furnace water energy storage device and the mixer are sequentially distributed from high to low.
Furthermore, the lower part of the water storage tank is communicated with a pipeline which leads to the input side of the mixer, and a valve III which is in an open state during the period that the rapid load rising and peak load regulation are needed is arranged on the pipeline.
The beneficial effects of the utility model reside in that:
the system is suitable for the quick load-changing working condition and the cold/hot starting working condition of the unit of the supercritical boiler (or ultra-supercritical boiler), wherein when the load of the unit is increased, high-quality hot water (high-temperature and high-pressure saturated water) can be quickly provided for the boiler through the high-temperature boiler water energy storage device and the system thereof so as to improve the enthalpy of a boiler entering working medium, and meanwhile, the quick feeding of the fuel quantity on the boiler side is matched, so that the quick improvement of the evaporation capacity of the boiler is realized, and the quick and flexible peak regulation capacity of the unit is improved; in addition, due to the existence of the high-temperature boiler water energy storage device, the boiler starting time of cold start or warm start of the boiler can be greatly shortened, and the quick and flexible peak regulation capability of the unit boiler is further improved.
Drawings
Fig. 1 is a system layout diagram of the present invention.
Detailed Description
The present invention will be further described with reference to the accompanying drawings and specific embodiments.
As shown in fig. 1, the present embodiment provides a rapid enhanced working medium side energy supply system for a supercritical or ultra-supercritical boiler, which includes:
a circulating water path 6 matched with the boiler and communicated with an input pipeline and an output pipeline, wherein the output pipeline is provided with a superheater 5;
the steam-water separator 13 is communicated with the output pipeline of the circulating water channel 6;
a water storage tank 14, wherein the water storage tank 14 is communicated with the steam-water separator 13;
the high-temperature furnace water energy storage device 15 with a storage cavity has a main body of a high-temperature resistant and pressure-bearing structure with a heat preservation function;
the energy storage pipeline can be opened and closed, and a steam cavity of the steam-water separator 13 and a liquid cavity of the water storage tank 14 are connected with the input side of the high-temperature furnace water energy storage device 15 through the energy storage pipeline;
and the energy release side of the high-temperature furnace water energy storage device 15 is connected with the input pipeline of the circulating water channel 6 through the energy release pipeline.
The steam cavity of the steam-water separator 13 and the liquid cavity of the water storage tank 14 are respectively connected with the high-temperature furnace water energy storage device 15 through the two energy storage pipelines; a seventh valve 12 is arranged in an energy storage pipeline connecting a steam cavity of the steam-water separator 13 and the high-temperature furnace water energy storage device 15, a first valve 7 is arranged in an energy storage pipeline connecting a liquid cavity of the water storage tank 14 and the high-temperature furnace water energy storage device 15, energy storage for the high-temperature furnace water energy storage device 15 and isolation between a new energy supply system and an original boiler steam-water system are realized by opening/closing the first valve 7, and the first valve 7 and the seventh valve 12 are in an open state in an energy storage stage, so that the steam cavity of the steam-water separator 13 and the liquid cavity of the water storage tank 14 are communicated with a storage cavity of the high-temperature furnace water energy storage device 15 through the energy storage pipeline. The high-temperature furnace water energy storage device 15 is used for introducing steam generated in the energy storage or release process into the steam-water separator 13 through a pipeline and the valve seven 12 for separation, balancing the pressure among the high-temperature furnace water energy storage device 15, the steam-water separator 13 and the water storage tank 14, and keeping the pressure balance.
The energy releasing pipeline is provided with a second valve 8 and a mixer 16 which are distributed in sequence, the second valve 8 is in an open state during the period of fast load rising and peak load regulation, the input side of the mixer 16 is also connected with an input pipeline and is connected with the input pipeline of the circulating water channel 6 through the input pipeline, a fourth valve 10 is arranged in the input pipeline, and the input pipeline of the circulating water channel 6 is communicated with the input side of the mixer 16 when the fourth valve 10 is in the open state.
The energy release pipeline is also provided with a boiler water circulating water pump 17 which is in an open state during the startup, low-load operation and rapid load-rise peak regulation of the boiler of the unit, and the suction end of the boiler water circulating water pump 17 is communicated with the output side of the mixer 16.
The energy release pipeline is also provided with a valve five 11 which is in an open state during the period of needing rapid load rising and peak load regulation, the valve five 11 is positioned at the pump-out side of the boiler water circulating water pump 17, the proportion of high-temperature boiler water entering the economizer 4 is adjusted by adjusting the opening degree of the valve five 11, so that the temperature of water entering an inlet of a boiler water-cooled wall system is adjusted, the temperature of the boiler wall of the unit is ensured not to be over-temperature, and the unit can run safely.
The input pipeline of the circulating water path 6 is provided with an economizer 4, the pump-out end of the furnace water circulating water pump 17 is respectively provided with a branch to be communicated with the input pipeline of the circulating water path 6, and the water inlet end of the economizer 4 is communicated with the pump-out end of the furnace water circulating water pump 17. The valve five 11 and the economizer 4 are equivalent to being arranged at the pumping-out end of the boiler water circulating water pump 17 in parallel.
The input pipeline of the circulating water channel 6 comprises a feed water pump 1, a valve six 2 and a check valve 3 which are sequentially arranged, and the access point of the input side of the mixer 16 and the input pipeline of the circulating water channel 6 is positioned between the valve six 2 and the check valve 3.
The steam-water separator 13, the water storage tank 14, the high-temperature furnace water energy storage device 15 and the mixer 16 are sequentially distributed from high to low, a pipeline communicated with the lower part of the water storage tank 14 is communicated with the input side of the mixer 16, and a valve III 9 which is in an open state during starting, low load and fast load rising and peak load regulation is arranged on the pipeline.
An outlet at the bottom of the high-temperature furnace water energy storage device 15, a low-temperature water supply branch of the water supply pump 1 and a high-temperature water branch of the water storage tank 14 are converged in a mixer 16 through a pipeline and a valve II 8, and the inlet temperature of the furnace water circulating water pump 17 is adjusted by adjusting the opening degrees of the valve II 8, the valve III 9 and the valve IV 10 (the inlet water temperature of the furnace water circulating water pump 17 is controlled to be lower than 400 ℃, the occurrence of local vaporization phenomenon is prevented, and the safe and reliable operation of the furnace water circulating water pump 17 is ensured); by adjusting the opening of the fifth valve 11, the flow distribution of the high-temperature furnace water at the outlet of the furnace water circulating water pump 17 into the economizer 4 and the boiler water-cooled wall inlet header is realized, the adjustment of the outlet temperature of the economizer 4 and the working medium temperature at the boiler furnace water-cooled wall inlet in a certain range is realized, and the safety of the wall temperature of the furnace water-cooled wall and the high-temperature heating surface is ensured while the capability of the unit boiler of rapidly increasing the load rate is ensured. The energy release and rapid load change processes of the high-temperature furnace water energy storage device 15 and the connection and isolation between the new energy supply system and the original boiler circulating water system are realized through the first valve 7, the second valve 8, the third valve 9, the fourth valve 10, the fifth valve 11 and the opening/closing of the boiler water circulating water pump 17.
During the normal load operation of the unit, the first valve 7, the second valve 8, the third valve 9, the fourth valve 10, the fifth valve 11, the seventh valve 12 and the boiler water circulating water pump 17 are closed, at the moment, the working medium side energy storage-supply system is isolated from the original boiler working medium circulating system (circulating water path 6), feed water is pumped by the feed water pump 1, and the heating, evaporation and overheating processes of the working medium are realized through the economizer 4, the hearth water-cooled wall, the superheater 5 and other heating surfaces.
During the energy storage period of the unit in high-load operation, except that the boiler normally provides high-quality steam, the steam entering the starting steam-water separator 13 is under-saturated steam at a certain pressure and temperature by adjusting the fuel-water ratio, high-temperature furnace water with high enthalpy is gathered in the water storage tank 14 under the action of the starting steam-water separator 13, after a certain liquid level is reached, energy is stored in the high-temperature furnace water energy storage device by opening the valve I7 and the valve II 12 on the top of the high-temperature furnace water energy storage device 15 (at this time, the valve II 8, the valve III 9 and the valve V11 are in a closed state, the valve IV 10 is in an open state, and the furnace water circulating water pump 17 is started to be in an open standby state), in addition, the opening degree of the valve I7 can be adjusted to control the water level of the water storage tank 14 and the temperature change rate of the high-temperature furnace water energy storage device 15 (below 400 ℃), the safe and stable operation of the boiler is ensured, and after the energy storage process is finished, the valve I7, the valve IV 10, the valve VII, the furnace water circulating pump 17 is closed, and the isolation between the high-temperature furnace water circulating system and the original boiler is realized.
During the unit needs to rapidly increase load and adjust peak, the rapid energy release of the working medium side energy storage-supply system is needed, the second valve 8, the third valve 9, the fourth valve 10, the fifth valve 11, the seventh valve 12 and the first valve 7 are opened, the high-temperature furnace water and the low-temperature feed water are fully mixed in the mixer 16 and then are pumped into the circulating water path 6 of the boiler hearth through the first valve 17, so that the enthalpy of the working medium entering the boiler is rapidly increased, and the evaporation capacity and the load-variable response rate of the boiler are rapidly increased by matching with the increase of the fuel entering the boiler; in addition, in the energy releasing process of the high-temperature furnace water energy storage device 15, the opening degree of the valve IV 10 is controlled, so that the water temperature at the inlet of the furnace water circulating water pump is in a controllable state, the water temperature at the inlet of the furnace water circulating water pump 17 is kept to be lower than 400 ℃, the local vaporization phenomenon is prevented, and the safety of a water circulating system is ensured; after the energy releasing process of the high-temperature boiler water energy storage device 15 is finished, the second valve 8, the third valve 9, the fourth valve 10, the fifth valve 11, the seventh valve 12 and the boiler water circulating pump 17 are closed, so that the isolation between the high-temperature boiler water energy storage system and the original boiler water circulating system is realized, and the standby boiler group performs the next energy storage process under the non-peak regulation working condition.
In addition, since the high-temperature furnace water energy storage device 15 stores high-quality hot water, the energy storage-release process of the high-temperature furnace water energy storage device 15 needs to be executed periodically according to the load operation condition of the unit, so that the high-temperature furnace water energy storage device 15 is always in a usable state and at a higher temperature level, and the unit boiler has quick load change response capability at any time.
Because the new energy storage-energy supply system on the working medium side directly stores high-temperature furnace water under the condition of high load or redundant load, and the heat exchange process between the high-temperature working medium and other energy storage media in the energy storage and release processes does not exist, the new energy storage-energy supply system has the characteristics of high thermal efficiency, high response speed, simple/reliable system, low investment and operation cost and the like, and has better engineering implementation feasibility.
The above are preferred embodiments of the present invention, and those skilled in the art can make various changes or improvements without departing from the general concept of the present invention, and all such changes or improvements should fall within the scope of the present invention.
Claims (10)
1. Super supercritical or super supercritical boiler strengthens working medium side energy supply system fast, its characterized in that includes:
a circulating water path (6) matched with the boiler and communicated with an input pipeline and an output pipeline;
the steam-water separator (13), the steam-water separator (13) is communicated with an output pipeline of the circulating water channel (6);
the water storage tank (14), the water storage tank (14) is communicated with the steam-water separator (13);
a high temperature furnace water energy storage device (15) with a storage cavity;
the steam cavity of the steam-water separator (13) and the liquid cavity of the water storage tank (14) are connected with the input side of the high-temperature furnace water energy storage device (15) through the energy storage pipeline;
the energy-releasing side of the high-temperature furnace water energy storage device (15) is connected with an input pipeline of the circulating water channel (6) through the energy-releasing pipeline.
2. The system of claim 1, wherein the supercritical or ultra-supercritical boiler rapidly intensifies the energy supplied from the working medium side, and comprises: the two energy storage pipelines are arranged, and a steam cavity of the steam-water separator (13) and a liquid cavity of the water storage tank (14) are respectively connected with the high-temperature furnace water energy storage device (15) through the two energy storage pipelines.
3. The system of claim 2, wherein the supercritical or ultra-supercritical boiler rapidly intensifies the energy supplied from the working medium side, and comprises: a seventh valve (12) is arranged in an energy storage pipeline which is connected with a steam cavity of the steam-water separator (13) and the high-temperature furnace water energy storage device (15), a first valve (7) is arranged in an energy storage pipeline which is connected with a liquid cavity of the water storage tank (14) and the high-temperature furnace water energy storage device (15), and the first valve (7) and the seventh valve (12) are in an opening state in an energy storage stage, so that the steam cavity of the steam-water separator (13) and the liquid cavity of the water storage tank (14) are communicated with a storage cavity of the high-temperature furnace water energy storage device (15) through the energy storage pipeline.
4. The system of claim 1, wherein the supercritical or ultra-supercritical boiler rapidly intensifies the energy supplied from the working medium side, and comprises: the energy releasing pipeline is provided with a second valve (8) and a mixer (16) which are distributed in sequence, the second valve (8) is in an opening state during the period of needing to rapidly raise load and adjust peak, the input side of the mixer (16) is also connected with an input pipeline and is connected with the input pipeline of the circulating water channel (6) through the input pipeline, a fourth valve (10) is arranged in the input pipeline, and when the fourth valve (10) is in the opening state, the input pipeline of the circulating water channel (6) is communicated with the input side of the mixer (16).
5. The system of claim 4, wherein the supercritical or ultra-supercritical boiler rapidly intensifies the energy supplied from the working medium side, and comprises: the energy release pipeline is also provided with a boiler water circulating water pump (17) which is in an open state during the period of needing boiler starting, low-load operation and quick load-rising peak regulation, and the suction end of the boiler water circulating water pump (17) is communicated with the output side of the mixer (16).
6. The system of claim 5, wherein the supercritical or ultra-supercritical boiler rapidly intensifies the energy supplied from the working medium side, and comprises: the energy release pipeline is also provided with a valve five (11) which is in an open and adjustable state during the period of needing rapid load-rising peak load regulation, and the valve five (11) is arranged at the pump-out side of the furnace water circulating water pump (17).
7. The system of claim 5, wherein the supercritical or ultra-supercritical boiler rapidly intensifies the energy supplied from the working medium side, and comprises: an input pipeline of the circulating water path (6) is provided with an economizer (4), a branch is arranged at the pump-out end of the furnace water circulating water pump (17) to be communicated with the input pipeline of the circulating water path (6), and the water inlet end of the economizer (4) is communicated with the pump-out end of the furnace water circulating water pump (17).
8. The system of claim 5, wherein the supercritical or ultra-supercritical boiler rapidly intensifies the energy supplied from the working medium side, and comprises: the input pipeline of circulation water route (6) is including feed water pump (1), six (2), check valve (3) that arrange in proper order, the access point of the input side of blender (16) and the input pipeline of circulation water route (6) is in between six (2) of valve and check valve (3).
9. The system of claim 4, wherein the supercritical or ultra-supercritical boiler rapidly intensifies the energy supplied from the working medium side, and comprises: the steam-water separator (13), the water storage tank (14), the high-temperature furnace water energy storage device (15) and the mixer (16) are sequentially distributed from high to low.
10. The rapid enhanced working medium side energy supply system of the supercritical or ultra-supercritical boiler according to claim 9, characterized in that: the lower part of the water storage tank (14) is communicated with a pipeline which leads to the input side of the mixer (16), and a valve III (9) which is in an opening state during the startup, the low-load operation and the rapid load-increasing peak load-adjusting period of the boiler is arranged on the pipeline.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220841695.6U CN218379356U (en) | 2022-04-08 | 2022-04-08 | Quick reinforced working medium side energy supply system for supercritical or ultra-supercritical boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220841695.6U CN218379356U (en) | 2022-04-08 | 2022-04-08 | Quick reinforced working medium side energy supply system for supercritical or ultra-supercritical boiler |
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| Publication Number | Publication Date |
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| CN218379356U true CN218379356U (en) | 2023-01-24 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202220841695.6U Active CN218379356U (en) | 2022-04-08 | 2022-04-08 | Quick reinforced working medium side energy supply system for supercritical or ultra-supercritical boiler |
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| CN (1) | CN218379356U (en) |
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- 2022-04-08 CN CN202220841695.6U patent/CN218379356U/en active Active
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Address after: 201800 1, No. 337, Shahe Road, Jiangqiao Town, Jiading District, Shanghai_ Room 203 j2976 Patentee after: SHANGHAI JIAO TONG University Patentee after: Shanghai huazhibang Energy Equipment Co.,Ltd. Address before: 201800 1, No. 337, Shahe Road, Jiangqiao Town, Jiading District, Shanghai_ Room 203 j2976 Patentee before: Shanghai huazhibang Energy Equipment Co.,Ltd. Patentee before: SHANGHAI JIAO TONG University |
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