CN216047955U - Energy-saving heating system - Google Patents
Energy-saving heating system Download PDFInfo
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- CN216047955U CN216047955U CN202121479177.6U CN202121479177U CN216047955U CN 216047955 U CN216047955 U CN 216047955U CN 202121479177 U CN202121479177 U CN 202121479177U CN 216047955 U CN216047955 U CN 216047955U
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Abstract
The utility model provides an energy-saving heat supply system which comprises a heat supply network heat supply water channel, a water supply pump heat supply pipeline and a steam turbine heat supply pipeline, wherein the heat supply network heat supply water channel penetrates through a heat supply network heater of the steam turbine heat supply pipeline, the water supply pump heat supply pipeline comprises a water supply pump steam turbine, a vacuum heat exchanger and a drain cooler which are sequentially communicated through a pipeline, the inlet end and the outlet end of the water pump heat supply system are respectively communicated with a water supply pump steam turbine and a main engine exhaust device, the water supply pump heat supply pipeline is connected to a main engine air island through a shunt behind the water supply pump steam turbine, and the heat supply network heat supply water channel penetrates through the vacuum heat exchanger and exchanges heat with the water supply pump heat supply pipeline through the vacuum heat exchanger. The effect of maximizing the utilization of available heat sources and maximizing the efficiency of the unit can be achieved.
Description
Technical Field
The utility model relates to the field of heat supply systems of thermal power plants, in particular to an energy-saving heat supply system.
Background
In a large-scale thermal power plant, the conventional heating hot water heating adopts a steam turbine to extract steam and heat heating return water through a steam-water heat exchanger, and the heating heat supply network return water is heated by the steam-water heat exchanger and then returns to a heat supply network; the heating steam is condensed into water after passing through the steam-water heat exchanger, and the temperature of condensed water after heat exchange returns to the deaerator and enters the steam-water circulation of the unit.
The traditional heating system is shown in the following figure 1, wherein low-pressure steam is generally adopted as steam for heating heat supply network water, a 350 MW-grade supercritical unit is taken as an example, fifth-grade steam extraction is generally adopted, parameters are about 0.4-0.6 MPa and 240-300 ℃, and condensed water is conveyed to a deaerator through a drainage pump.
For a large-capacity high-parameter air cooling unit, a steam-driven water-feeding pump is generally adopted, the water-feeding pump drives steam to generally adopt fourth-stage steam, the steam parameters are about 0.8-1.2 MPa and are 320-400 ℃, and the discharged steam of a steam turbine of the water-feeding pump enters a main engine air cooling tower to be cooled into condensed water.
A traditional heating system consumes certain steam parameters, and meanwhile, certain cold source loss is caused when exhaust steam of a steam-driven water supply pump enters an air cooling tower for cooling. And thus improvements are needed for targeting.
SUMMERY OF THE UTILITY MODEL
In view of the above disadvantages in the field of heat supply systems of thermal power plants at present, the utility model provides an energy-saving heat supply system, which can achieve the effects of maximizing the utilization of available heat sources and maximizing the efficiency of a unit.
In order to achieve the purpose, the utility model adopts the following technical scheme:
the utility model provides an energy-saving heating system, heating system includes heat supply network water course, water feeding pump heat supply pipeline and steam turbine heat supply pipeline, heat supply network heat supply water course runs through the heat supply network heater of steam turbine heat supply pipeline, water feeding pump heat supply pipeline is including the water feeding pump steam turbine, vacuum heat exchanger and the hydrophobic cooler that loop through the pipeline intercommunication, water pump steam turbine and host computer exhaust apparatus are supplied with in the intercommunication respectively at water pump heat supply system's business turn over both ends, water feeding pump pipeline is connected to host computer air cooling island through the shut behind the water feeding pump steam turbine, heat supply network heat supply water course runs through vacuum heat exchanger and passes through vacuum heat exchanger and water feeding pump heat supply pipeline heat transfer.
According to one aspect of the utility model, the initial section of the feed water pump heating pipeline is provided with a main valve and a regulating valve.
According to one aspect of the utility model, the heat supply network heater, the feed water pump turbine, the vacuum heat exchanger, the main machine air island and the inlet and outlet ends of the drain cooler are all provided with electric butterfly valves.
According to one aspect of the utility model, the heat network heater is heated by a steam turbine to provide heat extraction steam.
According to one aspect of the utility model, the heat net heater is communicated to the deaerator through a pipeline, and a manual butterfly valve, an electric regulating valve and a steam trap are sequentially arranged on the pipeline communicated with the deaerator.
According to one aspect of the utility model, the heat network heating water channel is provided with a circulation pump.
According to one aspect of the utility model, a heating bypass valve is arranged on the heating supply water channel of the heating network, and the heating network heater is connected with the heating bypass valve in parallel through a pipeline.
The implementation of the utility model has the advantages that:
the utility model provides an energy-saving heat supply system which comprises a heat supply network heat supply water channel, a water supply pump heat supply pipeline and a steam turbine heat supply pipeline, wherein the heat supply network heat supply pipeline penetrates through a heat supply network heater of the steam turbine heat supply pipeline, the water supply pump heat supply pipeline comprises a water supply pump steam turbine, a vacuum heat exchanger and a drain cooler which are sequentially communicated through pipelines, the inlet end and the outlet end of the water pump heat supply system are respectively communicated with a water supply pump steam turbine and a main engine exhaust device, the water supply pump heat supply pipeline is connected to a main engine air cooling island through a shunt behind the water supply pump steam turbine, and the heat supply network heat supply pipeline penetrates through the vacuum heat exchanger and exchanges heat with the water supply pump heat supply pipeline through the vacuum heat exchanger. The effect of maximizing the utilization of available heat sources and maximizing the efficiency of the unit can be achieved.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic diagram of a prior art structure;
fig. 2 is a schematic structural diagram of an energy-saving heating system according to the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1, an energy-saving heating system, the heating system includes heat supply network water supply channel, feed pump heat supply pipeline and steam turbine heat supply pipeline, heat supply network water supply channel runs through heat supply network heater 8 of steam turbine heat supply pipeline, feed pump heat supply pipeline includes feed pump steam turbine 4, vacuum heat exchanger 5 and hydrophobic cooler 7 that loop through the pipeline intercommunication, feed pump steam turbine steam and host computer exhaust apparatus are supplied with in feed out both ends of feed pump heating system intercommunication respectively, feed pump heat supply pipeline is connected to host computer air cooling island 1 through the shut behind feed pump steam turbine 4, heat supply network heat supply channel runs through vacuum heat exchanger 5 and passes through vacuum heat exchanger 5 and the heat supply pipeline heat transfer of feed pump.
In the embodiment, the initial section of the water supply pump heat supply pipeline is provided with a main valve 2 and a regulating valve 3.
In this embodiment, the inlet and outlet ends of the heat supply network heater 8, the feed water pump turbine 4, the vacuum heat exchanger 5, the main machine air cooling island 1 and the drain cooler 7 are all provided with electric butterfly valves.
In this embodiment, the heating network heater 8 is heated by a steam turbine for heat extraction.
In this embodiment, the heat supply network heater 8 is communicated to the deaerator through a pipeline, and a manual butterfly valve 10, an electric control valve 11 and a steam trap 12 are further sequentially arranged on the pipeline communicated with the deaerator.
In this embodiment the heat network heating water channel is provided with a circulation pump 6.
In this embodiment, a heat supply bypass valve 9 is arranged on the heat supply network heat supply water channel, and the heat supply network heater 8 is connected in parallel with the heat supply bypass valve 9 through a pipeline.
The steam-driven water-feeding pump is divided into two paths, one path enters the main engine air cooling island, the other path enters the vacuum heat exchanger, after being cooled by heat supply network water in the vacuum heat exchanger, condensed water returns to the main engine steam exhaust device after further recovering heat through the drain cooler. In non-heating seasons, steam discharged by a steam-driven water-feeding pump steam turbine is directly discharged into a main engine air cooling island, during heating seasons, a pipeline valve for removing the main engine air cooling island is closed, and the discharged steam enters a vacuum heat exchanger. The return water of the heat supply network firstly enters the vacuum heat exchanger to absorb the heat of the exhaust steam, then enters the heat supply network heater to continue heating, and finally enters the water supply pipeline of the heat supply network to supply heat to the outside. The heat supply network heater sets up the bypass, and at the heating initial stage or end of a week, when the heat supply demand is little, the heat supply network water directly supplies heat to the outside through the heat supply network heater, and when the heat supply demand was big during cold period, the heat supply network water was through the heat supply network heater then to the heat supply outside. The heat supply network water absorbs the latent heat of the exhausted steam, reduces the loss of the cold end of the steam turbine, reduces the heating steam extraction amount of the main engine, saves energy and increases the heat efficiency of the whole plant.
Taking a 350 MW-grade supercritical unit as an example, a water supply pump turbine usually adopts a fourth-grade steam extraction of the turbine, the parameters are about 0.8-1.2 MPa, 320-400 ℃ and the power is about 11000kW, when small machine exhaust steam enters a main machine air cooling island, the backpressure is about 11kPa, and when heat network water heating steam adopts a fifth-grade steam extraction of the turbine, the parameters are about 0.4-0.6 MPa and 240-300 ℃.
In order to fully utilize the latent heat of the small machine exhaust steam to heat the circulating water of the heat supply network, the backpressure of the small machine exhaust steam is increased from 11kPa to 54kPa, the temperature of the small machine exhaust steam is increased to 83 ℃, the heat release quantity of the small machine exhaust steam can reach 61MW, the heat supply network water of about 1800t/h can be heated from 50 ℃ to 78 ℃, and the heating index is assumed to be 55W/m2, so that the heating area can reach 110 ten thousand square meters.
The heating period is calculated according to 3 months, and 90 days, about 47 ten thousand yuan of coke (GJ) can be recovered annually, and each giga of coke is calculated according to 50 yuan, so that 2350 ten thousand yuan can be saved annually.
The implementation of the utility model has the advantages that:
the utility model provides an energy-saving heat supply system which comprises a heat supply network heat supply water channel, a water supply pump heat supply pipeline and a steam turbine heat supply pipeline, wherein the heat supply network heat supply water channel penetrates through a heat supply network heater of the steam turbine heat supply pipeline, the water supply pump heat supply pipeline comprises a water supply pump steam turbine, a vacuum heat exchanger and a drain cooler which are sequentially communicated through a pipeline, the inlet end and the outlet end of the water pump heat supply system are respectively communicated with a water supply pump steam turbine and a main engine exhaust device, the water supply pump heat supply pipeline is connected to a main engine air cooling island through a shunt behind the water supply pump steam turbine, and the heat supply network heat supply water channel penetrates through the vacuum heat exchanger and exchanges heat with the water supply pump heat supply pipeline through the vacuum heat exchanger. The effect of maximizing the utilization of available heat sources and maximizing the efficiency of the unit can be achieved. The heat supply network water is heated by utilizing the latent heat of the steam exhaust of the steam turbine of the water supply pump, the low-level heat energy is recovered, the cold source loss is reduced, and the heat efficiency of the whole plant is increased. The requirement of heating of different time quantums is satisfied, and the operation is nimble.
The above description is only an embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention disclosed herein are intended to be covered by the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.
Claims (7)
1. An energy-saving heating system which is characterized in that: the heating system comprises a heat supply network heat supply water channel, a water supply pump heat supply pipeline and a steam turbine heat supply pipeline, wherein the heat supply network heat supply water channel penetrates through a heat supply network heater of the steam turbine heat supply pipeline, the water supply pump heat supply pipeline comprises a water supply pump steam turbine, a vacuum heat exchanger and a hydrophobic cooler which sequentially communicate through a pipeline, the inlet end and the outlet end of the water pump heat supply system are respectively communicated with a water supply pump steam turbine and a host exhaust device, the water supply pump heat supply pipeline is connected to a host air cooling island through a shunt behind the water supply pump steam turbine, and the heat supply network heat supply water channel penetrates through the vacuum heat exchanger and exchanges heat with the water supply pump heat supply pipeline through the vacuum heat exchanger.
2. An energy-saving heating system according to claim 1, wherein: and a main valve and an adjusting valve are arranged at the initial section of the water supply pump heat supply pipeline.
3. An energy-saving heating system according to claim 2, wherein: and electric butterfly valves are arranged at the inlet and outlet ends of the heat supply network heater, the water supply pump steam turbine, the vacuum heat exchanger, the main machine air island and the drainage cooler.
4. An energy-saving heating system according to claim 3, wherein: the heating network heater supplies heat and extracts steam through a steam turbine to heat.
5. An energy-saving heating system according to claim 4, wherein: the heat supply network heater is communicated to the deaerator through a pipeline, and a manual butterfly valve, an electric regulating valve and a steam trap are sequentially arranged on the pipeline communicated with the deaerator.
6. An energy-saving heating system according to claim 5, wherein: the heat supply network heat supply water channel is provided with a circulating pump.
7. An energy-saving heating system according to claim 6, wherein: and a heat supply bypass valve is arranged on the heat supply water channel of the heat supply network, and the heat supply network heater is connected with the heat supply bypass valve in parallel through a pipeline.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121479177.6U CN216047955U (en) | 2021-07-01 | 2021-07-01 | Energy-saving heating system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121479177.6U CN216047955U (en) | 2021-07-01 | 2021-07-01 | Energy-saving heating system |
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| Publication Number | Publication Date |
|---|---|
| CN216047955U true CN216047955U (en) | 2022-03-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121479177.6U Active CN216047955U (en) | 2021-07-01 | 2021-07-01 | Energy-saving heating system |
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| CN (1) | CN216047955U (en) |
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2021
- 2021-07-01 CN CN202121479177.6U patent/CN216047955U/en active Active
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