CN217057668U - Flexible thermoelectric decoupling heating system - Google Patents
Flexible thermoelectric decoupling heating system Download PDFInfo
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- CN217057668U CN217057668U CN202220635291.1U CN202220635291U CN217057668U CN 217057668 U CN217057668 U CN 217057668U CN 202220635291 U CN202220635291 U CN 202220635291U CN 217057668 U CN217057668 U CN 217057668U
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Abstract
The utility model provides a flexible thermoelectric decoupling heating system, which comprises a steam turbine of a pumping condensing unit, a generator, a first station steam-water heat exchanger, a high-back-pressure unit condenser and an electric steam boiler, wherein a water side inlet arranged on the high-back-pressure unit condenser is connected with a return water outlet of a heat supply network; a water side outlet of the high back pressure unit condenser is connected with a water side inlet of the first station steam-water heat exchanger, and a water side outlet of the first station steam-water heat exchanger is connected with a heat supply network water supply inlet; a steam inlet arranged on the first station steam-water heat exchanger is respectively connected with a steam exhaust end of a medium pressure cylinder of a steam turbine of the condensing unit and a steam outlet of the electric steam boiler; the power output end of the steam turbine of the extraction condensing unit is connected with the power input end of the generator; the power supply end of the generator is connected with the power supply input end of the electric steam boiler; the device takes a large-capacity electric steam boiler as a peak heat source, can greatly increase the heat supply capacity in a severe cold period, can also improve the electric peak regulation capacity of a heat supply unit, and realizes flexible thermoelectric decoupling.
Description
Technical Field
The utility model belongs to the combined heat and power generation field relates to a nimble thermoelectric decoupling zero heating system.
Background
At present, cogeneration enterprises generally face dual requirements of participating in peak shaving of a power grid and improving heat supply capacity, and are limited by a traditional 'fixed power by heat' operation mode, conventional unit transformation cannot meet requirements, a low-pressure cylinder zero-output technology which is developed in recent years can realize thermoelectric decoupling, the peak shaving capacity and the heat supply capacity of a unit are improved, the dual requirements can be solved to a certain extent, the improvement of the heat supply capacity is limited, and the requirement that heat supply load is continuously increased in a certain period is difficult to meet.
In addition, when a unit is started, a plurality of cogeneration enterprises have single source of starting steam source and poor stability and reliability; moreover, the demand of auxiliary steam consumption in many cogeneration enterprises is continuously increased, and a standby steam source needs to be considered.
Disclosure of Invention
An object of the utility model is to provide a nimble thermoelectric decoupling zero heating system has solved the heating power that current combined heat and power exists and has promoted limited defect.
In order to achieve the purpose, the utility model adopts the technical scheme that:
the utility model provides a flexible thermoelectric decoupling heating system, including taking out congealing unit steam turbine, generator, first station soda heat exchanger, high back pressure unit condenser, electric steam boiler, wherein, the water side entry that sets up on the high back pressure unit condenser is connected heat supply network return water outlet; a water side outlet of the high back pressure unit condenser is connected with a water side inlet of the first station steam-water heat exchanger, and a water side outlet of the first station steam-water heat exchanger is connected with a heat supply network water supply inlet;
a steam inlet arranged on the first station steam-water heat exchanger is respectively connected with a steam exhaust end of a medium pressure cylinder of a steam turbine of the condensing unit and a steam outlet of the electric steam boiler;
the power output end of the steam turbine of the extraction condensing unit is connected with the power input end of the generator; and the power supply end of the generator is connected with the power supply input end of the electric steam boiler.
Preferably, a steam outlet of the electric steam boiler is connected with a steam-distributing cylinder, and the steam outlet of the steam-distributing cylinder is connected with a steam inlet arranged on the steam-water heat exchanger of the initial station.
Preferably, a # adjusting valve is arranged between the steam outlet of the steam-distributing cylinder and the steam inlet of the head station steam-water heat exchanger.
Preferably, the steam outlet of the steam-distributing cylinder is also connected with a standby steam source of a thermal power plant.
Preferably, a # adjusting valve is arranged between the steam outlet of the steam-distributing cylinder and the standby steam source of the thermal power plant.
Preferably, the steam outlet of the steam distributing cylinder is also connected with a steam inlet of a thermal deaerator, and the thermal deaerator is provided with a desalted water inlet; and a water outlet arranged on the thermal deaerator is connected with an electric steam boiler.
Preferably, a # regulating valve is arranged between the steam outlet of the steam-distributing cylinder and the steam inlet of the thermal deaerator.
Preferably, a boiler water feeding pump is arranged between the water outlet of the thermal deaerator and the electric steam boiler.
Preferably, a heat supply network circulating pump is arranged between a water side outlet of the high back pressure unit condenser and a water side inlet of the first station steam-water heat exchanger.
Preferably, the power output end of the generator also supplies power to the outside through the gateway meter.
Compared with the prior art, the beneficial effects of the utility model are that:
the utility model provides a pair of nimble thermal-electric decoupling zero heating system, heat supply network circulation return water supply outward after heating through high back pressure heating unit, extraction condensing heating unit in proper order, and the steam that electricity steam boiler unit and extraction condensing unit steam turbine produced gets into first station soda heat exchanger, promotes the heating capacity, and simultaneously, electricity steam boiler power consumption is got from the station service power, helps the thermal-electric decoupling zero, increases the flexibility of heating unit by a wide margin; the device takes a large-capacity electric steam boiler as a peak heat source, and the power of the electric steam boiler is taken from station power, so that the device is clean and efficient and has no environmental protection pressure; in the alpine period, the heat supply capacity can be greatly increased, the peak power regulation capacity of the heat supply unit can be improved, and the flexible thermoelectric decoupling is realized.
Furthermore, the utility model discloses well electric steam boiler still can regard as the stand-by vapour source of unit start and auxiliary steam header, improves the stability and the reliability of system.
Drawings
FIG. 1 is a schematic diagram of the system of the present invention;
the system comprises a steam turbine 1 of the extraction condensing unit, a generator 2, a gateway table 3, a steam-water heat exchanger 4 of a first station, a heat supply network circulating pump 5, a high-back-pressure unit condenser 6, a 1# regulating valve 7, a steam-separating cylinder 8, a 2# regulating valve 9, an electric steam superheater 10, a 3# regulating valve 11, a thermal deaerator 12, a boiler water-feeding pump 13 and an electric steam boiler 14.
Detailed Description
The utility model provides a nimble thermoelectric decoupling zero heating system, it is further explained in detail below to combine the figure the utility model discloses. The following description is merely exemplary in nature and is in no way intended to limit the scope of the invention or its application.
Referring to fig. 1, the utility model provides a pair of nimble thermoelectric decoupling zero heating system, including taking out condensing unit steam turbine 1, generator 2, gateway table 3, first station soda heat exchanger 4, heat supply network circulating pump 5, high back pressure unit condenser 6, 1# governing valve 7, gas-distributing cylinder 8, 2# governing valve 9, electric steam over heater 10, 3# governing valve 11, thermal oxygen-eliminating device 12, boiler feed pump 13, electric steam boiler 14, wherein:
the power output end of the steam turbine 1 of the extraction condensing unit is connected with the power input end of the generator 2 through a coupler; the power output end of the generator 2 is divided into two paths, one path is connected with the internet through the gateway table 3 to supply power to the outside, and the other path is connected with the power input end of the electric steam boiler 14.
A water side inlet of the high back pressure unit condenser 6 is connected with a heat supply network backwater main pipe, an outlet of the high back pressure unit condenser 6 is connected with an inlet of a heat supply network circulating pump 5, and an outlet of the heat supply network circulating pump 5 is connected with a water side inlet of a first station steam-water heat exchanger 4;
the water side outlet of the first station steam-water heat exchanger 4 is connected with a heat supply network water supply main pipe, the first station steam-water heat exchanger 4 is provided with two steam sources, one steam source is connected with the steam exhaust end of a medium pressure cylinder of the steam turbine 1 of the condensing unit, and the other steam source is connected with a steam distributing cylinder 8 through a 1# adjusting valve 7.
The water side inlet of the electric steam boiler 14 is connected with the outlet of the boiler feed water pump 13, and the steam side outlet of the electric steam boiler 14 is connected with the steam inlet of the steam-separating cylinder 8.
The steam distributing cylinder 8 is provided with three outlets which are respectively connected with inlets of a 1# regulating valve 7, a 2# regulating valve 9 and a 3# regulating valve 11;
the outlet of the 1# regulating valve 7 is connected with the steam side inlet of the first steam-water heat exchanger 4 to regulate the steam flow of the branch;
the outlet of the 2# regulating valve 9 is connected with the inlet of the electric steam superheater 10 and used for regulating the steam flow of a branch serving as a standby steam source;
and the outlet of the electric steam superheater 10 is connected with a steam supply main pipe or an auxiliary steam header of the starting boiler.
And the outlet of the 3# regulating valve 11 is connected with the steam inlet of the thermal deaerator 12 and is used for regulating the steam flow of the driving heat source of the thermal deaerator 12.
The inlet of the water side of the thermal deaerator 12 is connected with demineralized water, and the outlet of the water side of the thermal deaerator 12 is connected with the inlet of a boiler feed pump 13.
The working principle of the utility model is as follows;
the return water of the heat supply network firstly enters a condenser 6 of the high back pressure unit for heating, and the temperature is T h_0 Is increased to T h_1 The heated circulating water of the heat supply network enters a heat exchanger 4 of a heat supply initial station for further heating through a circulating pump 5 of the heat supply network, and the temperature is T h_1 Increase to T g_1 To meet the requirement of heat supply and supply the heat to the outside.
In the initial and final cold periods, the heat supply load is relatively small, the electric steam boiler unit is not started, and the high back pressure heat supply unit and the extraction and condensation heat supply unit jointly bear all heat loads; at the moment, all steam sources of the steam-water heat exchanger 4 at the first station are discharged from a medium-pressure cylinder of the steam turbine 1 of the extraction condensing unit.
In the severe cold period, the heat supply load is large, and the electric steam boiler unit is started to operate, and the high back pressure heat supply unit, the extraction condensation heat supply unit and the electric steam boiler unit jointly bear all heat loads; at the moment, one part of a steam source of the steam-water heat exchanger 4 of the initial station is from steam exhausted by a medium pressure cylinder of the steam turbine 1 of the extraction condensing unit, and the other part of the steam source is from steam generated by an electric steam boiler 14;
the electricity used by the electric steam boiler 14 is derived from station power, the generated steam has 3 purposes, except the steam-water heat exchanger 4 at the first station, one part of the generated steam enters the electric steam superheater 10, is heated to become superheated steam, and enters a steam supply main pipe or an auxiliary steam header of the starting boiler to serve as a standby steam source; the other part enters a thermal deaerator 12 to heat the boiler feed water.
The above description is only for the preferred 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 should be covered by the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. The flexible thermoelectric decoupling heating system is characterized by comprising a steam turbine (1) of a condensing unit, a generator (2), a first-station steam-water heat exchanger (4), a high-back-pressure unit condenser (6) and an electric steam boiler (14), wherein a water-side inlet arranged on the high-back-pressure unit condenser (6) is connected with a return water outlet of a heat supply network; a water side outlet of the high back pressure unit condenser (6) is connected with a water side inlet of the first steam-water heat exchanger (4), and a water side outlet of the first steam-water heat exchanger (4) is connected with a heat supply network water supply inlet;
a steam inlet arranged on the first station steam-water heat exchanger (4) is respectively connected with a steam outlet of an electric steam boiler (14) and a steam exhaust end of a medium pressure cylinder of a steam turbine (1) of the condensing unit;
the power output end of the steam turbine (1) of the extraction condensing unit is connected with the power input end of the generator (2); the power supply end of the generator (2) is connected with the power supply input end of the electric steam boiler (14).
2. The flexible thermal-electric decoupling heating system according to claim 1, wherein a steam outlet of the electric steam boiler (14) is connected with a steam-splitting cylinder (8), and a steam outlet of the steam-splitting cylinder (8) is connected with a steam inlet arranged on the initial station steam-water heat exchanger (4).
3. The flexible thermoelectric decoupling heating system as claimed in claim 2, wherein a # 1 regulating valve (7) is arranged between the steam outlet of the steam-splitting cylinder (8) and the steam inlet of the head steam-water heat exchanger (4).
4. The flexible thermoelectric decoupling heating system of claim 2, wherein the steam outlet of the steam-splitting cylinder is further connected with a backup steam source of a thermal power plant.
5. A flexible thermoelectric decoupled heating system according to claim 4, characterized in that a 2# regulating valve (9) is arranged between the steam outlet of the steam-splitting cylinder (8) and the backup steam source of the thermal power plant.
6. The flexible thermoelectric decoupling heating system as claimed in claim 2, wherein the steam outlet of the steam-distributing cylinder is further connected with the steam inlet of a thermal deaerator (12), and the thermal deaerator (12) is provided with a demineralized water inlet; the water outlet arranged on the thermal deaerator (12) is connected with an electric steam boiler (14).
7. A flexible thermoelectric decoupling heating system as in claim 6, characterized by that between the steam outlet of the steam-splitting cylinder and the steam inlet of the thermal deaerator (12) is provided a 3# regulating valve (11).
8. A flexible heat and power decoupled heating system according to claim 6, characterized in that a boiler feed pump (13) is provided between the water outlet of the thermal deaerator (12) and the electric steam boiler (14).
9. The flexible thermoelectric decoupling heating system according to claim 1, wherein a heat supply network circulating pump (5) is arranged between a water side outlet of the high back pressure unit condenser (6) and a water side inlet of the first-station steam-water heat exchanger (4).
10. A flexible heat and electricity decoupling heating system according to claim 1, wherein the power output of the generator (2) is also supplied with electricity via the meter (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220635291.1U CN217057668U (en) | 2022-03-22 | 2022-03-22 | Flexible thermoelectric decoupling heating system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220635291.1U CN217057668U (en) | 2022-03-22 | 2022-03-22 | Flexible thermoelectric decoupling heating system |
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| Publication Number | Publication Date |
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| CN217057668U true CN217057668U (en) | 2022-07-26 |
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| CN202220635291.1U Active CN217057668U (en) | 2022-03-22 | 2022-03-22 | Flexible thermoelectric decoupling heating system |
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- 2022-03-22 CN CN202220635291.1U patent/CN217057668U/en active Active
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