CN218379355U - Quick reinforced working medium side energy supply system for subcritical boiler - Google Patents
Quick reinforced working medium side energy supply system for subcritical boiler Download PDFInfo
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- CN218379355U CN218379355U CN202220841605.3U CN202220841605U CN218379355U CN 218379355 U CN218379355 U CN 218379355U CN 202220841605 U CN202220841605 U CN 202220841605U CN 218379355 U CN218379355 U CN 218379355U
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Abstract
The utility model discloses a sub-critical boiler strengthens working medium side energy supply system fast, include: a water supply pipeline of the steam pocket is connected, and a water supply pump and an economizer are sequentially arranged on the water supply pipeline; connecting a circulating water loop of the steam drum; a high temperature furnace water energy storage device; the communicating pipeline is connected with the steam pocket and leads high-temperature high-pressure saturated water in the steam pocket to the high-temperature furnace water energy storage device when the valve is opened; a water supply branch provided with an on-off valve, wherein the water supply branch is communicated with a water supply pipeline and a circulating water loop; the furnace water mixing header is arranged in the water supply branch; and the energy release side of the high-temperature furnace water energy storage device is communicated with the furnace water mixing header through the energy release pipeline when the valve is opened. By adopting the scheme, the rapid improvement of the evaporation rate of the boiler is realized, and the rapid and flexible peak regulation capability of the unit is improved; due to the existence of the high-temperature furnace water energy storage device, the start 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.
Description
Technical Field
The utility model relates to a thermal generator set boiler energy supply system especially relates to a be fit for the new system of quick nimble peak shaving energy supply of subcritical unit boiler.
Background
The variable load rate of the traditional thermal generator set is generally 1.0-1.5% of rated load/minute, and the maximum variable load rate can reach 2.0% of rated load/minute. However, in the future, a novel power system mainly using renewable energy provides a higher requirement (5.0% -8.0% rated load/minute) for the peak regulation rate of the thermal power generating unit, and the conventional thermal power generating unit still cannot meet the requirement 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.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a strengthen subcritical boiler fast peak shaving and become new system of energy supply of load capacity from working medium side.
The purpose of the utility model is realized like this: subcritical boiler strengthens working medium side energy supply system fast, includes:
a water supply pipeline of the steam pocket is connected, and a water supply pump and an economizer are sequentially arranged on the water supply pipeline;
a circulating water loop connecting the steam drum to circulate water flow;
the high-temperature furnace water energy storage device with a high-temperature resistant and pressure-bearing structure is arranged;
the communicating pipeline is provided with an opening and closing valve, is connected with the steam pocket and leads high-temperature saturated water in the steam pocket to the high-temperature furnace water energy storage device when the valve is opened;
the water supply branch is provided with an opening and closing valve and is communicated with a water supply pipeline and a circulating water loop when the valve is opened;
the furnace water mixing header is arranged in the water supply branch;
and the energy release side of the high-temperature furnace water energy storage device is communicated with the furnace water mixing header through the energy release pipeline when the valve is opened.
Furthermore, the communicating pipeline is composed of a steam exhaust pipeline and an energy storage pipeline, the steam exhaust pipeline is communicated with a steam cavity in the steam drum and a steam cavity of the high-temperature furnace water energy storage device, the steam exhaust pipeline is provided with an exhaust valve, the energy storage pipeline is communicated with a water cavity in the steam drum and the high-temperature furnace water energy storage device, and the water drainage pipeline is provided with a first valve.
Further, in the energy storage stage, the first valve and the evacuation valve are both in an open state.
Further, the height position of the high-temperature furnace water energy storage device is lower than that of the steam drum.
Further, the furnace water mixing header is positioned below the high-temperature furnace water energy storage device.
Furthermore, a boiler supplementing water pump is arranged on the water supply branch, and the suction end of the boiler supplementing water pump is communicated with the water outlet side of the boiler water mixing header.
Furthermore, the water supply branch is provided with a valve IV, the valve IV is positioned at the downstream of the output end of the fettling water pump, and the valve IV is in an opening state when the unit needs to be quickly loaded and started in an emergency cold state or a hot state.
Furthermore, a valve III is arranged at a position, close to the input point, of the water supply branch, and the valve III is in an opening state when the unit needs to be quickly loaded and started in an emergency cold state or a hot state.
Further, the evacuation valve is in an open state when the unit requires rapid load-up and an emergency cold or hot start.
The beneficial effects of the utility model reside in that: the system is suitable for the subcritical boiler quick load-changing working condition of a thermal generator set and the cold/hot starting working condition of the unit, wherein high-quality hot water can be quickly provided for the boiler through the high-temperature boiler water energy storage device to improve the enthalpy of a boiler-entering working medium when the unit is in the load-increasing working condition, and meanwhile, the quick increase of the evaporation capacity of the boiler is realized by matching with the quick feeding of the fuel quantity on the boiler side, so that 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, a subcritical boiler rapid enhanced working medium side energy supply system is provided, comprising:
a water supply pipeline 3 of the steam drum 4 is connected, and a water supply pump 1 and an economizer 2 are sequentially arranged on the water supply pipeline 3;
a circulating water circuit 5 which connects the steam drum 4 to circulate water flow;
the superheater 7 is used for passing hot steam output by the steam cavity of the steam drum 4 through the superheater 7;
a high-temperature furnace water energy storage device 12 with a high-temperature resistant and pressure-bearing structure is arranged;
a communicating pipeline which is provided with an opening and closing valve, is connected with the steam drum 4 and leads the high-temperature saturated water in the steam drum 4 to the high-temperature furnace water energy storage device 12 when the valve is opened;
a water supply branch 16 for opening and closing the valve is arranged, and when the valve is opened, the water supply branch 16 is communicated with the water supply pipeline 3 and the circulating water loop 5;
a furnace water mixing header 17 provided in the water supply branch 16;
and an energy release pipeline 13 provided with a third valve 15, wherein the energy release side of the high-temperature furnace water energy storage device 12 is communicated with a furnace water mixing header 17 through the energy release pipeline 13 when the valve is opened.
The communicating pipeline consists of a steam exhaust pipeline 9 and an energy storage pipeline 11, the steam exhaust pipeline 9 is communicated with an upper steam cavity in the steam drum 4 and an upper steam cavity of the high-temperature furnace water energy storage device 12, the steam exhaust pipeline 9 is provided with an exhaust valve 8, the exhaust valve 8 is in an open state when the unit needs quick load rise and emergency cold or hot starting, the energy storage pipeline 11 is communicated with a water cavity in the steam drum 4 and the high-temperature furnace water energy storage device 12, the energy storage pipeline 11 is provided with a valve I10, the valve I10 and the exhaust valve 8 are both in an open state in an energy storage stage, the high-temperature furnace water energy storage device 12 introduces steam into the steam drum 4 through a pipeline, pressure between the high-temperature furnace water energy storage device 12 and the steam drum 4 is balanced, and pressure balance is kept; and when the energy storage is not needed, the first valve 10 and the emptying valve 8 are closed, and the connection/disconnection between the energy storage 12 of the high-temperature furnace water energy storage device and the steam drum 4 is realized through the opening/closing of the first valve 10 and the emptying valve 8.
The height position of the high-temperature furnace water energy storage device 12 is lower than that of the steam drum 4, and the furnace water mixing header 17 is positioned below the high-temperature furnace water energy storage device 12.
A furnace supplementing water pump 18 is arranged on the water supply branch 16, and the suction end of the furnace supplementing water pump 18 is communicated with the water outlet side of the furnace water mixing header 17.
The water supply branch 16 is provided with a valve IV 19, the valve IV 19 is positioned at the downstream of the output end of the fettling water pump 18, and the valve IV 19 is in an opening state when the unit needs to be rapidly loaded and started in an emergency cold state or a hot state.
The position of the water supply branch 16 close to the input point is provided with a valve III 15, and the valve III 15 is in an opening state when the unit needs quick load increase and emergency cold or hot starting.
The controllable and adjustable working medium temperature of the boiler water mixing header 17 is realized by adjusting the opening degree of the second valve 14 and the third valve 15, the outlet of the boiler water mixing header 17 is connected with the circulating water loop 5 of the boiler through a pipeline, a boiler supplementing water pump 18 and a fourth valve 19, and the energy release and rapid load change processes of the energy storage device and the partition between the new energy supply system and the original boiler circulating water system can be realized by opening/starting the second valve 14, the third valve 15, the fourth valve 19 and the starting boiler supplementing water pump 18.
During the normal load operation of the unit, the first valve 10, the second valve 14, the third valve 15, the fourth valve 19, the evacuation valve 8 and the boiler-supplementing water pump 18 are closed, at the moment, the working medium side energy storage-supply system is isolated from the original boiler working medium circulation system, feed water is pumped in by the feed water pump 1, enters the steam drum 4 after being heated by the economizer 2, the steam drum 4 receives the feed water, supplies water to the circulating water loop 5 through the down pipe, and the heating and evaporation processes of the working medium in the boiler furnace 6 are realized through the driving force of natural circulation or control circulation (with a boiler water circulation pump).
During the energy storage period of the high-load operation of the unit or the period of needing to rapidly reduce the load, except that the boiler normally provides high-quality steam, the first valve 10 and the emptying valve 8 at the top of the boiler water heat storage device are opened to store energy to the high-temperature boiler water energy storage device 12, meanwhile, the second valve 14, the third valve 15 and the fourth valve 19 are closed, the boiler supplementing water pump 18 is in a standby state, in addition, the distribution proportion of saturated water in the steam pocket 4 to the descending pipe and the high-temperature boiler water energy storage device 12 can be adjusted by adjusting the opening degree of the first valve 10, the pressure in the energy storage device and the pipeline is kept below 17MPa, the working medium temperature is below 400 ℃, the safe and stable operation of the boiler is ensured, and after the energy storage process is finished, the first valve 10 and the emptying valve 8 are closed, and the isolation between the high-temperature boiler water energy storage device 12 and the original boiler water circulation system is realized.
During the unit needs fast load-raising and peak-load-adjusting, fast energy release of a working medium side energy storage-supply system is needed, a second valve 14, a third valve 15, a fourth valve 19, an exhaust valve 8 and a start boiler-supplementing water pump 18 are opened, meanwhile, a first valve 10 is in a closed state, high-temperature boiler water and low-temperature feed water are fully mixed in a boiler water mixing header 17 and then are pumped into a circulating water loop 5 of a boiler hearth 6 through the boiler-supplementing water pump 18, so that enthalpy of the working medium entering the boiler is fast improved, and the boiler evaporation capacity and the load-variable response rate are fast improved by matching with the improvement of the quantity of the fuel entering the boiler; in addition, in the energy release process of the high-temperature furnace water energy storage device 12, the water temperature at the inlet of the fettling water pump 18 is in a controllable state by automatically adjusting the opening of the third valve 15, the water temperature at the inlet of the fettling water pump 18 is kept to be lower than 400 ℃, the occurrence of a local vaporization phenomenon is prevented, and the safety of a water circulation system is ensured; after the energy releasing process of the high-temperature furnace water energy storage device 12 is finished, the second valve 14, the third valve 15, the fourth valve 19 and the boiler supplementing water pump 18 are closed, the isolation between the high-temperature furnace water energy storage system and the original boiler water circulation system is realized, and the standby group boiler performs the next energy storage process under the non-peak regulation working condition.
Because the high-temperature furnace water energy storage device 12 stores high-quality hot water (high temperature and high pressure), the energy storage-release process of the high-temperature furnace water energy storage device 12 needs to be periodically carried out according to the load operation condition of the unit, so that the high-temperature furnace water energy storage device 12 is always in an available state and at a higher temperature level, and the unit boiler has quick load change response capability at any time.
Because the new energy supply system needs to adjust parameters such as hot water mixing temperature, pressure, flow rate and the like in the load climbing period in real time and has higher requirements on adjustment response capability and response speed, the new energy supply system needs to be matched with a corresponding control system and a corresponding control strategy so as to realize real-time adjustment and control of the new energy supply system.
The above are preferred embodiments of the present invention, and those skilled in the art can make various changes or modifications without departing from the general concept of the present invention, and such changes or modifications should fall within the scope of the present invention.
Claims (9)
1. Subcritical boiler strengthens working medium side energy supply system fast, includes:
a water supply pipeline (3) of the steam drum (4) is connected, and a water supply pump (1) and an economizer (2) are sequentially arranged on the water supply pipeline (3);
a circulating water circuit (5) which is communicated with the steam drum (4) to circulate water flow;
it is characterized by also comprising:
a high-temperature furnace water energy storage device (12) with a certain high-temperature resistant and pressure-bearing structure is arranged;
a communicating pipeline which is provided with an opening and closing valve, is connected with the steam drum (4) and leads high-temperature saturated water in the steam drum (4) to the high-temperature furnace water energy storage device (12) when the valve is opened;
the water supply branch (16) is provided with an opening and closing valve, and the water supply branch (16) is communicated with the water supply pipeline (3) and the circulating water loop (5) when the valve is opened;
a furnace water mixing header (17) arranged in the water supply branch (16);
and an energy release pipeline (13) provided with a valve III (15), wherein when the valve is opened, the energy outlet side of the high-temperature furnace water energy storage device (12) is communicated with a furnace water mixing header (17) through the energy release pipeline (13).
2. The subcritical boiler rapid working medium strengthening side energy supply system according to claim 1, wherein: the communicating pipe is composed of a steam exhaust pipeline (9) and an energy storage pipeline (11), the steam exhaust pipeline (9) is communicated with a steam cavity in the steam drum (4) and a steam cavity of the high-temperature furnace water energy storage device (12), the steam exhaust pipeline (9) is provided with an exhaust valve (8), the energy storage pipeline (11) is communicated with a water cavity in the steam drum (4) and the high-temperature furnace water energy storage device (12), and the energy storage pipeline (11) is provided with a valve I (10).
3. The subcritical boiler rapid strengthening working medium side energy supply system according to claim 2, wherein: in the energy storage stage, the first valve (10) and the evacuation valve (8) are both in an open state.
4. The subcritical boiler rapid working medium strengthening side energy supply system according to claim 2, wherein: the height position of the high-temperature furnace water energy storage device (12) is lower than that of the steam drum (4).
5. The subcritical boiler rapid strengthening working medium side energy supply system according to claim 1, wherein: the furnace water mixing header (17) is positioned below the high-temperature furnace water energy storage device (12).
6. The subcritical boiler rapid strengthening working medium side energy supply system according to claim 1, wherein: and a fettling water pump (18) is arranged on the water supply branch (16), and the suction end of the fettling water pump (18) is communicated with the water outlet side of the boiler water mixing header (17).
7. The subcritical boiler rapid strengthening working medium side energy supply system according to claim 6, wherein: the water supply branch (16) is provided with a valve IV (19), the valve IV (19) is positioned at the downstream of the output end of the fettling water pump (18), and the valve IV (19) is in an opening state when the unit needs to rapidly load up and start in an emergency cold state or a hot state.
8. The subcritical boiler rapid working medium intensive side energy supply system according to claim 7, wherein: and a third valve (15) is arranged at a position, close to the input point, of the water supply branch (16), and the third valve (15) is in an opening state when the unit needs to be rapidly loaded and started in an emergency cold state or a hot state.
9. The subcritical boiler rapid working medium strengthening side energy supply system according to claim 2, wherein: the evacuation valve (8) is in an open state when the unit requires rapid load-up and an emergency cold or hot start.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220841605.3U CN218379355U (en) | 2022-04-08 | 2022-04-08 | Quick reinforced working medium side energy supply system for subcritical boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220841605.3U CN218379355U (en) | 2022-04-08 | 2022-04-08 | Quick reinforced working medium side energy supply system for subcritical boiler |
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| Publication Number | Publication Date |
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| CN218379355U true CN218379355U (en) | 2023-01-24 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202220841605.3U Active CN218379355U (en) | 2022-04-08 | 2022-04-08 | Quick reinforced working medium side energy supply system for subcritical boiler |
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| CN (1) | CN218379355U (en) |
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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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