CN113738463B - Dual bypass control extraction steam hybrid heat exchange frequency modulation system - Google Patents
Dual bypass control extraction steam hybrid heat exchange frequency modulation system Download PDFInfo
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- CN113738463B CN113738463B CN202111157417.5A CN202111157417A CN113738463B CN 113738463 B CN113738463 B CN 113738463B CN 202111157417 A CN202111157417 A CN 202111157417A CN 113738463 B CN113738463 B CN 113738463B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K13/00—General layout or general methods of operation of complete plants
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D13/00—Combinations of two or more machines or engines
- F01D13/02—Working-fluid interconnection of machines or engines
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D15/00—Adaptations of machines or engines for special use; Combinations of engines with devices driven thereby
- F01D15/10—Adaptations for driving, or combinations with, electric generators
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K13/00—General layout or general methods of operation of complete plants
- F01K13/006—Auxiliaries or details not otherwise provided for
-
- 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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K17/00—Using steam or condensate extracted or exhausted from steam engine plant
- F01K17/02—Using steam or condensate extracted or exhausted from steam engine plant for heating purposes, e.g. industrial, domestic
- F01K17/025—Using steam or condensate extracted or exhausted from steam engine plant for heating purposes, e.g. industrial, domestic in combination with at least one gas turbine, e.g. a combustion gas turbine
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K21/00—Steam engine plants not otherwise provided for
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- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Engine Equipment That Uses Special Cycles (AREA)
Abstract
一种双旁路控制抽汽式混合换热调频系统，包括高压缸，中压缸，低压缸，凝汽器，凝结水泵，下级低压加热器，通过主管道与下级低压加热器相连接的第一个旁路控制器，上级低压加热器，通过主管道与上级低压加热器相连接的第二个旁路控制器，除氧器，通过管道与除氧器直接相连接的高压加热器，入口既通过管道与第二个旁路控制器相连接又通过蒸汽管道与高压缸相连接、出口通过蒸汽管道与中压缸相连接的再热器。本发明快速实现响应电网对机组负荷变化的调频要求，避免汽轮机调频时进蒸汽自动调节阀的频繁开关，运行稳定可靠，保证汽轮机安全运行，显著提高机组寿命及灵活性，节能显著，调频幅度大。可广泛应用于电厂灵活性调频领域中。
A double bypass control extraction steam type hybrid heat exchange frequency modulation system, including a high-pressure cylinder, a medium-pressure cylinder, a low-pressure cylinder, a condenser, a condensate pump, a lower-level low-pressure heater, a first bypass controller connected to the lower-level low-pressure heater through a main pipeline, an upper-level low-pressure heater, a second bypass controller connected to the upper-level low-pressure heater through a main pipeline, a deaerator, a high-pressure heater directly connected to the deaerator through a pipeline, and a reheater whose inlet is connected to the second bypass controller through a pipeline and to the high-pressure cylinder through a steam pipeline, and whose outlet is connected to the medium-pressure cylinder through a steam pipeline. The present invention can quickly respond to the frequency modulation requirements of the power grid to the load changes of the unit, avoid frequent switching of the steam inlet automatic regulating valve during turbine frequency modulation, operate stably and reliably, ensure safe operation of the turbine, significantly improve the life and flexibility of the unit, save energy significantly, and have a large frequency modulation range. It can be widely used in the field of flexible frequency modulation of power plants.
Description
Technical Field
The invention relates to a double-bypass control steam extraction type hybrid heat exchange frequency modulation system which can be widely applied to the field of flexible frequency modulation of power plants.
Background
According to the adjustment of the economic policy, the electricity utilization structure of China is changed, the electricity utilization requirement of a user side is changed at any moment, in addition, according to the gradual improvement of the environmental protection policy, the proportion of renewable energy sources of wind energy and solar energy is greatly improved, but the renewable energy sources are unstable, and a power plant is required to adjust the load so as to ensure the supply and demand balance of a power grid. In summary, because of instantaneous unbalance between supply and demand of the power grid, disturbance of the power grid and frequency thereof is easily caused, and the frequency is an important technical index for safe and stable operation of the power system.
At present, a power plant responds to the frequency modulation requirement of a power grid mainly by increasing or decreasing fuel of a boiler or adjusting the steam inlet quantity of a steam turbine, but the measures have certain limitations, such as delay of the boiler and limited adjustment margin of the steam turbine. In addition, there are other frequency modulation means, such as energy storage frequency modulation modes of a storage battery and a heat storage tank, and energy conversion modes of an electrode boiler, and the frequency modulation response speed is slow, the investment cost is high, and the operation cost is high.
Disclosure of Invention
The invention aims to provide the double bypass control steam extraction type hybrid heat exchange frequency modulation system which can rapidly realize the frequency modulation requirement of a response power grid on the load change of a unit, avoid frequent switching of a steam inlet automatic regulating valve during frequency modulation of a steam turbine, ensure safe operation of the steam turbine, remarkably improve the service life and flexibility of the unit, remarkably save energy and have large frequency modulation amplitude.
In order to achieve the aim, the double bypass control steam extraction type mixed heat exchange frequency modulation system comprises a high-pressure cylinder, a medium-pressure cylinder connected with the high-pressure cylinder through a pipeline, a low-pressure cylinder connected with the medium-pressure cylinder through a pipeline, a condenser connected with the low-pressure cylinder through a pipeline, a condensate pump connected with the condenser through a pipeline, a lower-stage low-pressure heater connected with the condensate pump through a pipeline, a first bypass controller connected with the lower-stage low-pressure heater through a main pipeline, an upper-stage low-pressure heater connected with the first bypass controller through a main pipeline and directly connected with the lower-stage low-pressure heater through a drain pipeline, a second bypass controller connected with the medium-pressure cylinder through a medium-pressure cylinder steam extraction pipeline, a deaerator connected with the second bypass controller through a pipeline, a high-pressure heater connected with the upper-stage low-pressure heater through a pipeline, and a high-pressure heater connected with the medium-pressure cylinder through a steam pipeline, wherein an inlet is connected with the second bypass controller through a steam pipeline and a reheat pipe.
The invention relates to a double bypass control steam extraction type mixed heat exchange frequency modulation system, which comprises a first bypass controller, a first buffer tank, a first lower booster pump, a first lower automatic regulating valve, a first upper booster pump and a second upper booster pump, wherein the bottom of the first buffer tank is provided with a steam inlet port and a steam outlet port, the middle part of the first buffer tank is provided with a cold water port and a hot water port, the first lower booster pump is positioned at the lower part of the first buffer tank and connected with the water outlet port of the first buffer tank through a pipeline and connected with a drain pipeline, the first lower automatic regulating valve is positioned at the lower part of the first buffer tank and connected with the steam inlet port of the first buffer tank through a pipeline and connected with the steam extraction pipeline of a medium pressure cylinder through a pipeline, the first upper booster pump is positioned at the upper part of the liquid level of the first buffer tank and connected with the hot water port of the first buffer tank through a pipeline, a first bypass automatic shutoff valve connected with the first upper booster pump through a pipeline and connected with the main pipeline through a left bypass pipeline, a first main automatic shutoff valve positioned on the main pipeline connected with the upper low-pressure heater and the lower low-pressure heater, a first upper automatic regulating valve connected between the inlet and the outlet of the first main automatic shutoff valve through a pipeline, a first bypass automatic regulating valve connected with the cold water interface of the first buffer tank through a pipeline and connected with the main pipeline through a right bypass pipeline, a first bypass automatic shutoff valve with one end connected with the connecting pipeline between the outlet of the first upper booster pump and the first bypass automatic shutoff valve, a first heat network circulating pump outlet connected with the first bypass automatic shutoff valve through a pipeline, a first heat network circulating pump outlet connected with the first heat network circulating pump outlet through a pipeline, a second heat network circulating pump outlet connected with the second heat network circulating pump outlet through a pipeline, and the other end of the first bypass automatic regulating valve is connected with a first bypass automatic regulating valve on a connecting pipeline between the first buffer tank and the first bypass automatic regulating valve.
The invention relates to a double bypass control steam extraction type mixed heat exchange frequency modulation system, which comprises a second bypass controller, a second buffer tank, a second lower booster pump, a second lower automatic regulating valve, a second upper booster pump and a second upper booster pump, wherein the bottom of the second buffer tank is provided with a steam inlet port and a water outlet port, the middle of the second buffer tank is provided with a cold water port and a hot water port, the second lower booster pump is positioned at the lower part of the second buffer tank and connected with the water outlet port of the second buffer tank through a pipeline and connected with a deaerator through a pipeline, the second lower automatic regulating valve is positioned at the lower part of the second buffer tank and connected with a high-pressure cylinder and a reheater through a pipeline, the second upper booster pump is positioned at the upper part of the liquid level of the second buffer tank and connected with the hot water port of the second buffer tank through a pipeline, a second bypass automatic shutoff valve connected with the second upper booster pump through a pipeline and the main pipeline through a left bypass pipeline, a second main automatic shutoff valve positioned on the main pipeline connected with the upper low-pressure heater and the deaerator, a second upper automatic regulating valve connected between the inlet and the outlet of the second main automatic shutoff valve through a pipeline, a second bypass automatic regulating valve connected with the cold water interface of the second buffer tank through a pipeline and the main pipeline through a right bypass pipeline, a second branch automatic shutoff valve with one end connected with the pipeline between the outlet of the second upper booster pump and the second bypass automatic shutoff valve, a second heat supply network circulating pump outlet connected with the second branch automatic shutoff valve through a pipeline, a third heat supply network circulating pump outlet connected with the second heat supply network circulating pump outlet through a pipeline, and the other end of the second bypass automatic regulating valve is connected with a second bypass automatic regulating valve on a connecting pipeline between the second buffer tank and the second bypass automatic regulating valve.
According to the double bypass control steam extraction type mixed heat exchange frequency modulation system, the first bypass controller also needs to maintain a basic load when not modulating frequency, so that quick response of frequency modulation is realized.
According to the double bypass control steam extraction type mixed heat exchange frequency modulation system, the second bypass controller is required to maintain a basic load when not modulating frequency, so that quick response of frequency modulation is realized.
The invention relates to a double bypass control steam extraction type mixed heat exchange frequency modulation system, wherein the heat exchange medium of the first bypass controller is boiler condensate water or winter heat supply network circulating water.
The invention relates to a double bypass control steam extraction type mixed heat exchange frequency modulation system, wherein the second bypass controller is used for heat exchange medium of boiler condensate water or winter heat supply network circulating water.
The invention discloses a double bypass control steam extraction type mixed heat exchange frequency modulation system, wherein the first buffer tank is used for mixed heat exchange, and steam and water are directly mixed for heat exchange.
The invention discloses a double bypass control steam extraction type mixed heat exchange frequency modulation system, wherein the second buffer tank is used for mixed heat exchange, and steam and water are directly mixed for heat exchange.
The invention discloses a double bypass control steam extraction type mixed heat exchange frequency modulation system, wherein the first buffer tank is a pressure-bearing tank or an atmospheric tank.
The invention discloses a double bypass control steam extraction type mixed heat exchange frequency modulation system, wherein the second buffer tank is a pressure-bearing tank or an atmospheric tank.
The invention discloses a double bypass control steam extraction type mixed heat exchange frequency modulation system, which adopts two bypass controllers to cooperatively work. When it is desired to increase the grid frequency, i.e. increase the power plant's power generation load, it is desired to decrease the bypass controller load. The bypass controller reduces the extraction of steam, and more steam is used for generating electricity by the steam turbine, so that the requirements of unit load and quick response to the increase of the frequency of the power grid can be rapidly improved. The specific working process is as follows:
When the heat exchange medium is condensed water, the main automatic shut-off valve, the branch automatic regulating valve and the branch automatic shut-off valve of the two bypass controllers are all in a closed state, and the bypass automatic shut-off valves of the two bypass controllers are in an open state. The opening degree of the lower automatic regulating valve of the two bypass controllers is reduced, the steam extraction of the medium pressure cylinder is reduced, and the frequency of the lower booster pump is reduced in order to maintain the liquid level in the buffer tank due to the reduction of the steam extraction amount, so that the water discharge amount of the buffer tank is equivalent to the steam extraction amount. Because the steam extraction amount is reduced, in order to keep the temperature of the condensed water in the buffer tank within the designed value range, the flow rate of the condensed water entering the buffer tank needs to be reduced, the opening of the upper automatic regulating valve is increased, and the opening of the bypass automatic regulating valve is reduced. In order to maintain the water flow balance of the system, the frequency of a booster pump at the upper part of the outlet of the buffer tank needs to be reduced, so that the hot water outlet amount of the buffer tank is equivalent to the cold water inlet amount.
And when the heat exchange medium is heat supply network circulating water, the upper automatic regulating valves, the bypass automatic regulating valves and the bypass automatic shutoff valves of the two bypass controllers are in a closed state, and the main automatic shutoff valves and the branch automatic shutoff valves of the two bypass controllers are in an open state. The opening degree of the lower automatic regulating valves of the two bypass controllers is reduced, the steam extraction of the medium pressure cylinder is reduced, and the frequency of the lower booster pump is reduced to enable the water discharge amount of the buffer tank to be equal to the steam extraction amount in order to maintain the liquid level in the buffer tank due to the reduction of the steam extraction amount. Because the steam extraction amount is reduced, in order to keep the temperature of the heat supply network circulating water in the buffer tank within the designed value range, the flow of the heat supply network circulating water entering the buffer tank needs to be reduced, and the opening of the branch automatic regulating valve is reduced. In order to maintain the balance of the circulating water flow of the heat supply network, the frequency of a booster pump at the upper part of the outlet of the buffer tank needs to be reduced, so that the hot water outlet of the buffer tank is equivalent to the cold water inlet.
The invention discloses a double bypass control steam extraction type mixed heat exchange frequency modulation system, which adopts two bypass controllers to cooperatively work. When the grid frequency needs to be reduced, i.e. the power generation load of the power plant is reduced, the bypass controller load needs to be increased. The bypass controller has the advantages of increasing steam extraction, reducing steam for power generation of the steam turbine, rapidly reducing unit load and rapidly responding to the requirement of power grid frequency reduction. The specific working process is as follows:
When the heat exchange medium is condensed water, the main automatic shut-off valve, the branch automatic regulating valve and the branch automatic shut-off valve of the two bypass controllers are in a closed state, and the bypass automatic shut-off valves of the two bypass controllers are in an open state. The valve opening of the lower automatic regulating valves of the two bypass controllers is increased, the steam extraction of the medium pressure cylinder is increased, and the frequency of the lower booster pump is also required to be increased to maintain the liquid level in the buffer tank so that the water discharge amount of the buffer tank is equivalent to the steam extraction amount. Because the steam extraction amount is increased, in order to keep the temperature of the condensed water in the buffer tank at a design value, the flow of the condensed water entering the buffer tank needs to be increased, the opening of the upper automatic regulating valve is reduced, and the opening of the bypass automatic regulating valve is increased. In order to maintain the water flow balance of the main system, the frequency of the booster pump at the upper part of the outlet of the buffer tank needs to be increased, so that the hot water outlet of the buffer tank is equivalent to the cold water inlet.
And secondly, when the heat exchange medium is heat supply network circulating water, the upper automatic regulating valves, the bypass automatic regulating valves and the bypass automatic shutoff valves of the two bypass controllers are in a closed state, and the main automatic shutoff valves and the branch automatic shutoff valves of the two bypass controllers are in an open state. The valve opening of the lower automatic regulating valves of the two bypass controllers is increased, the steam extraction of the medium pressure cylinder is increased, and the frequency of the lower booster pump is also required to be increased to maintain the liquid level in the buffer tank so that the water discharge amount of the buffer tank is equivalent to the steam extraction amount. Because the steam extraction amount is increased, in order to keep the temperature of the heat supply network circulating water in the buffer tank at a design value, the flow of the heat supply network circulating water entering the buffer tank needs to be increased, and the opening of the branch automatic regulating valve is increased. In order to maintain the balance of the circulating water flow of the main system heat supply network, the frequency of a booster pump at the upper part of the outlet of the buffer tank needs to be increased, so that the hot water outlet of the buffer tank is equivalent to the cold water inlet.
According to the double bypass control steam extraction type mixed heat exchange frequency modulation system, the first buffer tank or the second buffer tank is designed according to the frequency modulation amplitude requirement of the power grid so as to meet the heat storage requirement. And is designed into a pressure-bearing tank or a normal pressure tank according to the requirements of steam temperature, pressure and inlet and outlet water temperature. The drainage pipeline connected with the water drain interface of the buffer tank is the drainage pipeline with the same quality as the steam extraction of the buffer tank or the drainage pipeline corresponding to the temperature and the pressure of the water drain.
The double bypass control steam extraction type mixed heat exchange frequency modulation system provided by the invention has the advantages that the first or second main path automatic shutoff valve, the bypass automatic shutoff valve and the branch automatic shutoff valve are electric, pneumatic or hydraulic driven valves, and the medium can be automatically, quickly and reliably stopped.
The double bypass control steam extraction type mixed heat exchange frequency modulation system provided by the invention has the advantages that the first or second lower automatic regulating valve, the bypass automatic regulating valve, the upper automatic regulating valve and the branch automatic regulating valve are electric, pneumatic or hydraulic driven valves, and the medium flow can be automatically, quickly and reliably regulated.
According to the double bypass control steam extraction type mixed heat exchange frequency modulation system, the first or second lower booster pumps and the upper booster pumps can automatically control and regulate medium flow.
According to the double bypass control steam extraction type mixed heat exchange frequency modulation system, two bypass controllers are adopted, under the condition that the structure of a steam turbine and the opening of the steam inlet automatic regulating valve are not changed, the steam flow of the high-medium pressure cylinder of the steam turbine is directly increased and reduced, the frequency modulation requirement of a power grid on the load change of a unit is rapidly met, frequent switching of the steam inlet automatic regulating valve during frequency modulation of the steam turbine is avoided, the operation is stable and reliable, the safe operation of the steam turbine is ensured, and the service life and flexibility of the unit are remarkably prolonged.
The double bypass control steam extraction type mixed heat exchange frequency modulation system can directly heat the boiler condensate water or the heat supply network water by the extracted steam, has very small energy loss in the frequency modulation process, almost has no energy loss and has remarkable energy conservation.
The double bypass control steam extraction type mixed heat exchange frequency modulation system adopts the double bypass controller and has the advantage of large frequency modulation amplitude.
In summary, the double-bypass control steam extraction type hybrid heat exchange frequency modulation system provided by the invention can be used for rapidly realizing the frequency modulation requirement of responding to the power grid on the unit load change, avoiding frequent switching of the steam inlet automatic regulating valve during the frequency modulation of the steam turbine, ensuring the safe operation of the steam turbine, remarkably improving the service life and flexibility of the unit, remarkably saving energy and having large frequency modulation amplitude.
Drawings
The invention will be further described with reference to the accompanying drawings and examples.
Fig. 1 is a schematic structural view of the present invention.
Detailed Description
In fig. 1, the dual bypass control steam extraction type hybrid heat exchange frequency modulation system of the invention comprises a high-pressure cylinder 1, a medium-pressure cylinder 2 connected with the high-pressure cylinder through a pipeline, a low-pressure cylinder 3 connected with the medium-pressure cylinder through a pipeline, a condenser 4 connected with the low-pressure cylinder through a pipeline, a condensate pump 5 connected with the condenser through a pipeline, a lower-stage low-pressure heater 6 connected with the condensate pump through a pipeline, a first bypass controller 7 connected with the lower-stage low-pressure heater through a main pipeline 13, an upper-stage low-pressure heater 8 connected with the first bypass controller through a main pipeline and directly connected with the lower-stage low-pressure heater through a drain pipeline 14 and directly connected with the medium-pressure cylinder through a medium-pressure cylinder steam extraction pipeline 15, a second bypass controller 9 connected with the upper-stage low-pressure heater through a main pipeline, a reheat heater 10 connected with the second bypass controller through a pipeline, a high-pressure heater 11 connected with the deaerator directly through a pipeline, and a steam inlet connected with the second bypass controller through a steam pipeline and a steam outlet 12 connected with the medium-pressure cylinder.
The invention relates to a double bypass control steam extraction type mixed heat exchange frequency modulation system, which comprises a first bypass controller 7, a first buffer tank 7-1, a first lower booster pump 7-2, a first lower automatic regulating valve 7-3, a first upper booster pump 7-4, a second lower automatic regulating valve 7-3, a third upper booster pump 7-4, a third upper booster pump 7-1, a fourth lower booster pump 7-2, a third upper booster pump 7-4, a fourth upper booster pump 7-4, a third upper booster pump 7-1, a third booster pump 7-1, a fourth booster pump 7-2, a third booster pump 7-4, a fourth booster pump 7-2, a third booster pump 7-4, a fourth booster pump is arranged at the bottom of the third booster pump and is connected with the first buffer tank water outlet through a pipeline, a first bypass automatic shutoff valve 7-5 connected with the first upper booster pump through a pipeline and connected with the main pipeline through a left bypass pipeline, a first main automatic shutoff valve 7-6 positioned on the main pipeline connected with the upper low pressure heater and the lower low pressure heater, a first upper automatic regulating valve 7-7 connected between the inlet and the outlet of the first main automatic shutoff valve through a pipeline, a first bypass automatic regulating valve 7-8 connected with the cold water interface of the first buffer tank through a pipeline and connected with the main pipeline through a right bypass pipeline, a first bypass automatic shutoff valve 7-9 with one end connected with the connecting pipeline between the outlet of the first upper booster pump and the first bypass automatic shutoff valve, a first heat supply network circulating pump outlet 7-10 connected with the first bypass automatic shutoff valve through a pipeline, one end of the first bypass automatic regulating valve 7-11 is connected with the first heat supply network circulating pump outlet through a pipeline, and the other end of the first bypass automatic regulating valve is connected with a connecting pipeline between the first buffer tank and the first bypass automatic regulating valve.
The invention relates to a double bypass control steam extraction type mixed heat exchange frequency modulation system, which comprises a second bypass controller 9, a second buffer tank 9-1, a second lower booster pump 9-2, a first pump and a second pump, wherein the bottom of the second buffer tank 9-1 is provided with a steam inlet interface and a water outlet interface, the middle of the second buffer tank is provided with a cold water interface and a hot water interface, the second pump is positioned at the lower part of the second buffer tank and is connected with the water outlet interface of the second buffer tank through a pipeline, the second lower booster pump is connected with a deaerator through a pipeline, a second lower automatic regulating valve 9-3 positioned at the lower part of the second buffer tank and connected with a steam inlet port of the second buffer tank through a pipeline and connected with the high-pressure cylinder and the reheater through a pipeline, a second upper booster pump 9-4 positioned at the upper part of the liquid level of the second buffer tank and connected with a hot water port of the second buffer tank through a pipeline, a second bypass automatic shutoff valve 9-5 connected with the second upper booster pump through a pipeline and the main pipeline through a left bypass pipeline, a second main automatic shutoff valve 9-6 positioned on the main pipeline connected with the deaerator by the upper low-pressure heater, a second upper automatic regulating valve 9-7 connected between the inlet and the outlet of the second main automatic shutoff valve through a pipeline, a second bypass automatic regulating valve 9-8 connected with the cold water interface of the second buffer tank through a pipeline and the main pipeline through a right bypass pipeline, a second branch automatic shutoff valve 9-9 with one end connected with the connecting pipeline between the outlet of the second upper booster pump and the second bypass automatic shutoff valve, a second heat supply network circulating pump outlet 9-10 connected with the second branch automatic shutoff valve through a pipeline, a second heat supply network circulating pump outlet 9-10 with one end connected with the second branch automatic shutoff valve through a pipeline, a third heat supply network circulating pump outlet connected with the second heat supply network circulating pump outlet, and the other end of the second bypass automatic regulating valve 9-11 is connected with a connecting pipeline between the second buffer tank and the second bypass automatic regulating valve.
According to the double bypass control steam extraction type mixed heat exchange frequency modulation system, the first bypass controller also needs to maintain a basic load when not modulating frequency, so that quick response of frequency modulation is realized.
According to the double bypass control steam extraction type mixed heat exchange frequency modulation system, the second bypass controller is required to maintain a basic load when not modulating frequency, so that quick response of frequency modulation is realized.
The invention relates to a double bypass control steam extraction type mixed heat exchange frequency modulation system, wherein the heat exchange medium of the first bypass controller is boiler condensate water or winter heat supply network circulating water.
The invention relates to a double bypass control steam extraction type mixed heat exchange frequency modulation system, wherein the second bypass controller is used for heat exchange medium of boiler condensate water or winter heat supply network circulating water.
The invention discloses a double bypass control steam extraction type mixed heat exchange frequency modulation system, wherein the first buffer tank is used for mixed heat exchange, and steam and water are directly mixed for heat exchange.
The invention discloses a double bypass control steam extraction type mixed heat exchange frequency modulation system, wherein the second buffer tank is used for mixed heat exchange, and steam and water are directly mixed for heat exchange.
The invention discloses a double bypass control steam extraction type mixed heat exchange frequency modulation system, wherein the first buffer tank is a pressure-bearing tank or an atmospheric tank.
The invention discloses a double bypass control steam extraction type mixed heat exchange frequency modulation system, wherein the second buffer tank is a pressure-bearing tank or an atmospheric tank.
In view of the foregoing, it is to be understood that the present invention is not limited to the particular embodiments described above, but is to be understood as being embodied in many different forms and arrangements, not being limited to the specific embodiments described above, but rather being embodied in a generic and specific manner; any simple modification, equivalent variation and modification of the above embodiments according to the technical substance of the present invention will fall within the scope of the technical solution of the present invention, without departing from the scope of the technical solution of the present invention.
Claims (11)
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| CN103452600A (en) * | 2013-08-06 | 2013-12-18 | 中国能源建设集团广东省电力设计研究院 | Steam turbine generating system with indirect regulation on regenerative side and primary frequency regulating method |
| CN111485961A (en) * | 2020-04-10 | 2020-08-04 | 中国能源建设集团浙江省电力设计院有限公司 | A gas-steam combined cycle thermal system with steam extraction and recuperation |
| CN215718996U (en) * | 2021-09-30 | 2022-02-01 | 青岛达能环保设备股份有限公司 | Double-bypass control steam extraction type mixed heat exchange frequency modulation device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| DE202008017640U1 (en) * | 2008-07-21 | 2010-04-22 | Oao "Vniiaes" | Device for carrying out a work procedure for a thermal power station |
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