CN217380674U - Waste heat utilization system of thermal power plant - Google Patents
Waste heat utilization system of thermal power plant Download PDFInfo
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- CN217380674U CN217380674U CN202221486977.5U CN202221486977U CN217380674U CN 217380674 U CN217380674 U CN 217380674U CN 202221486977 U CN202221486977 U CN 202221486977U CN 217380674 U CN217380674 U CN 217380674U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P80/00—Climate change mitigation technologies for sector-wide applications
- Y02P80/10—Efficient use of energy, e.g. using compressed air or pressurized fluid as energy carrier
- Y02P80/15—On-site combined power, heat or cool generation or distribution, e.g. combined heat and power [CHP] supply
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Abstract
The utility model discloses a waste heat utilization system of a thermal power plant, which comprises a small steam turbine, a condenser, a first manual door, an auxiliary steam header, a desuperheater, a second manual door, a third manual door, a fourth manual door, a first heat exchanger and a second heat exchanger; the exhaust port of the small steam turbine is divided into three paths, wherein the first path is communicated with the condenser through a third manual door, the second path is communicated with the condenser through a fourth manual door and the pipe side of the first heat exchanger, and the third path is communicated with the condenser through a second manual door and the heat release side of the second heat exchanger; the outlet of the auxiliary steam header is communicated with the heat release side inlet of the second heat exchanger through the first manual door and the desuperheater, and the raw water pipeline is communicated with an external demineralized water preparation system through the heat absorption side of the second heat exchanger. The outlet of the auxiliary steam header is communicated with the heat release side inlet of the second heat exchanger through the first manual valve, the first stop valve, the first pneumatic regulating valve and the desuperheater, and the system can realize the waste steam heat recovery of the small steam turbine in the working process.
Description
Technical Field
The utility model belongs to the technical field of the energy utilization, a waste heat utilization system of steam power plant is related to.
Background
The safety and reliability of the important auxiliary engine of the coal-fired power generating set are enhanced, the overall economy of the set is improved, and the profitability of a coal-fired power plant is improved. In a coal-fired power generating unit, a feed water pump and an induced draft fan are driven by a motor, which is one of important reasons for large energy consumption of the unit. Meanwhile, when the water feeding pump and the induced draft fan are started, the current is overlarge, impact can be caused to an auxiliary power system, and production safety is influenced. In order to solve the problems, a feed water pump or a draught fan of most units is changed into a small steam turbine drive from a motor drive. At present, a boiler feed pump (main operation pump) of a large-scale thermal power plant is basically a steam-driven feed pump, an electric feed pump is only used as a starting feed pump and a standby water pump (generally, 30% of the boiler capacity), and more fans (especially induced fans with larger power) of the large-scale thermal power plant are also driven by industrial turbines. Although the application cases of the steam feed water pump in a small and medium-sized thermal power plant exist, the application cases account for less than that of a large-sized thermal power plant; and the steam-driven fan has almost no corresponding application case in small and medium-sized thermal power plants.
Although technologies of a water feeding pump and an induced draft fan driven by a small steam turbine are applied more and more, a series of defects still exist, for example, the exhausted steam of the small steam turbine has a certain temperature, but the discharged steam belongs to low-grade energy in a thermal power plant, the continuous utilization value is not high, and the utilization path is limited.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome above-mentioned prior art's shortcoming, provide a waste heat utilization system of steam power plant, this system can realize that little steam turbine does the exhaust steam heat recovery of doing work.
In order to achieve the purpose, the waste heat utilization system of the thermal power plant comprises a small steam turbine, a condenser, a first manual door, an auxiliary steam header, a desuperheater, a second manual door, a third manual door, a fourth manual door, a first heat exchanger and a second heat exchanger;
the exhaust port of the small steam turbine is divided into three paths, wherein the first path is communicated with the condenser through a third manual door, the second path is communicated with the condenser through a fourth manual door and the pipe side of the first heat exchanger, and the third path is communicated with the condenser through a second manual door and the heat release side of the second heat exchanger;
the outlet of the auxiliary steam header is communicated with the heat release side inlet of the second heat exchanger through the first manual door and the desuperheater, and the raw water pipeline is communicated with an external demineralized water preparation system through the heat absorption side of the second heat exchanger.
The outlet of the auxiliary steam header is communicated with the heat-releasing side inlet of the second heat exchanger through a first manual valve, a first stop valve, a first pneumatic regulating valve and a desuperheater.
And the third path is communicated with the condenser through a second manual valve, a second stop valve, a second pneumatic regulating valve and the heat release side of the second heat exchanger.
The first path is communicated with the condenser through a third manual door, a third stop valve and a third pneumatic regulating valve.
And the second path is communicated with the condenser through a fourth manual valve, a fourth stop valve, a fourth pneumatic regulating valve and the pipe side of the first heat exchanger.
The shell side of the first heat exchanger is in communication with a thermal user.
Also comprises a raw water bypass; the raw water bypass is communicated with the heat absorption side of the second heat exchanger in parallel.
The raw water bypass is provided with a bypass manual door.
The utility model discloses following beneficial effect has:
waste heat utilization system of steam power plant when concrete operation, utilize little steam turbine exhaust steam heating demineralized water and house service heating, the low-quality heat source of make full use of realizes the maximize utilization of the energy, reduces the heat consumption of unit, improves the economic benefits of whole factory, not only environmental protection but also energy-conservation. It should be noted that the utility model discloses effectively utilize the low-grade heat of little steam turbine exhaust, realize heat recovery and recycle, reduce the loss of unit heat consumption.
Drawings
FIG. 1 is a schematic view of the system structure of the present invention
Wherein, 1 is the small steam turbine, 2 is the condenser, 3 is first manual valve, 4 is first stop valve, 5 is first pneumatic governing valve, 6 is the auxiliary steam header, 7 is the desuperheater, 8 is second pneumatic governing valve, 9 is the second stop valve, 10 is the second manual valve, 11 is the third manual valve, 12 is the third stop valve, 13 is the third pneumatic governing valve, 14 is the fourth manual valve, 15 is the fourth stop valve, 16 is the fourth pneumatic governing valve, 17 is first heat exchanger, 18 is the heat consumer, 19 is the second heat exchanger, 20 is the bypass manual valve.
Detailed Description
In order to make the technical solutions of the present invention better understood, the drawings in the embodiments of the present invention will be combined below to clearly and completely describe the technical solutions in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments, and do not limit the scope of the present invention. Moreover, in the following description, descriptions of well-known structures and techniques are omitted so as to not unnecessarily obscure the concepts of the present disclosure. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts shall belong to the protection scope of the present invention.
A schematic structural diagram according to an embodiment of the present disclosure is shown in the drawings. The figures are not drawn to scale, wherein certain details are exaggerated and possibly omitted for clarity of presentation. The shapes of various regions, layers and their relative sizes and positional relationships shown in the drawings are merely exemplary, and deviations may occur in practice due to manufacturing tolerances or technical limitations, and a person skilled in the art may additionally design regions/layers having different shapes, sizes, relative positions, according to actual needs.
Referring to fig. 1, the waste heat utilization system of the thermal power plant according to the present invention includes a small steam turbine 1, a condenser 2, a first manual valve 3, a first stop valve 4, a first pneumatic adjusting valve 5, an auxiliary steam header 6, a desuperheater 7, a second pneumatic adjusting valve 8, a second stop valve 9, a second manual valve 10, a third manual valve 11, a third stop valve 12, a third pneumatic adjusting valve 13, a fourth manual valve 14, a fourth stop valve 15, a fourth pneumatic adjusting valve 16, a first heat exchanger 17, 18, a second heat exchanger 19, and a bypass manual valve 20;
the exhaust port of the small steam turbine 1 is divided into three paths, wherein the first path is communicated with the condenser 2 through a third manual valve 11, a third stop valve 12 and a third pneumatic regulating valve 13, the second path is communicated with the condenser 2 through a fourth manual valve 14, a fourth stop valve 15, a fourth pneumatic regulating valve 16 and the pipe side of a first heat exchanger 17, and the third path is communicated with the condenser 2 through a second manual valve 10, a second stop valve 9, a second pneumatic regulating valve 8 and the heat release side of a second heat exchanger 19;
an outlet of the auxiliary steam header 6 is communicated with a heat release side inlet of the second heat exchanger 19 through the first manual valve 3, the first stop valve 4, the first pneumatic regulating valve 5 and the desuperheater 7, a raw water pipeline is communicated with an external demineralized water preparation system through a heat absorption side of the second heat exchanger 19, a raw water bypass is communicated with a heat absorption side of the second heat exchanger 19 in parallel, a bypass manual valve 20 is arranged on the raw water bypass, and a shell side of the first heat exchanger 17 is communicated with a hot user 18.
The utility model discloses a concrete working process does:
at the initial starting stage or the pneumatic preparation stage of the small steam turbine 1, one path of steam is extracted through the auxiliary steam header 6 and then enters the second heat exchanger 19 through the first manual valve 3, the first stop valve 4, the first pneumatic regulating valve 5 and the desuperheater 7.
When the water side of the second heat exchanger 19 is blocked or the temperature of the primary water in summer reaches the required temperature for preparing the demineralized water, the first pneumatic regulating valve 5 and the second pneumatic regulating valve 8 are closed, and the bypass manual valve 20 is opened.
And in the heating system, in the non-heating period, the fourth manual door 14, the fourth stop valve 15 and the fourth pneumatic regulating valve 16 are closed, and in the heating period, the fourth manual door 14, the fourth stop valve 15 and the fourth pneumatic regulating valve 16 are opened to perform heating for the plant and short-distance heating.
Working media on the heat release sides of the first heat exchanger 17 and the second heat exchanger 19 finally enter the condenser 2 for recycling so as to reduce the loss of high-quality water.
Claims (8)
1. The waste heat utilization system of the thermal power plant is characterized by comprising a small steam turbine (1), a condenser (2), a first manual door (3), an auxiliary steam header (6), a desuperheater (7), a second manual door (10), a third manual door (11), a fourth manual door (14), a first heat exchanger (17) and a second heat exchanger (19);
the exhaust steam port of the small steam turbine (1) is divided into three paths, wherein the first path is communicated with the condenser (2) through a third manual door (11), the second path is communicated with the condenser (2) through a fourth manual door (14) and the pipe side of a first heat exchanger (17), and the third path is communicated with the condenser (2) through a second manual door (10) and the heat release side of a second heat exchanger (19);
the outlet of the auxiliary steam header (6) is communicated with the heat release side inlet of the second heat exchanger (19) through the first manual door (3) and the desuperheater (7), and the raw water pipeline is communicated with an external demineralized water preparation system through the heat absorption side of the second heat exchanger (19).
2. The waste heat utilization system of a thermal power plant according to claim 1, characterized in that the outlet of the auxiliary steam header (6) is communicated with the heat-releasing side inlet of the second heat exchanger (19) through the first manual valve (3), the first stop valve (4), the first pneumatic regulating valve (5) and the desuperheater (7).
3. The waste heat utilization system of the thermal power plant according to claim 2, characterized in that the third path is communicated with the condenser (2) through a second manual valve (10), a second stop valve (9), a second pneumatic regulating valve (8) and the heat release side of the second heat exchanger (19).
4. The waste heat utilization system of the thermal power plant according to claim 3, characterized in that the first path is communicated with the condenser (2) through a third manual door (11), a third stop valve (12) and a third pneumatic control valve (13).
5. The waste heat utilization system of the thermal power plant according to claim 4, characterized in that the second path is communicated with the condenser (2) through a fourth manual valve (14), a fourth stop valve (15), a fourth pneumatic regulating valve (16) and a tube side of the first heat exchanger (17).
6. The waste heat utilization system of a thermal power plant according to claim 1, characterized in that the shell side of the first heat exchanger (17) is in communication with a heat consumer (18).
7. The waste heat utilization system of a thermal power plant according to claim 1, further comprising a raw water bypass; the raw water bypass is communicated in parallel with the heat absorption side of the second heat exchanger (19).
8. The system for utilizing waste heat of a thermal power plant according to claim 7, wherein a bypass manual door (20) is provided on the raw water bypass.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221486977.5U CN217380674U (en) | 2022-06-14 | 2022-06-14 | Waste heat utilization system of thermal power plant |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221486977.5U CN217380674U (en) | 2022-06-14 | 2022-06-14 | Waste heat utilization system of thermal power plant |
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| Publication Number | Publication Date |
|---|---|
| CN217380674U true CN217380674U (en) | 2022-09-06 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202221486977.5U Active CN217380674U (en) | 2022-06-14 | 2022-06-14 | Waste heat utilization system of thermal power plant |
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| CN (1) | CN217380674U (en) |
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2022
- 2022-06-14 CN CN202221486977.5U patent/CN217380674U/en active Active
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