CN212177241U - Quick start-up system of gas steam combined cycle unit - Google Patents
Quick start-up system of gas steam combined cycle unit Download PDFInfo
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- CN212177241U CN212177241U CN202020746278.4U CN202020746278U CN212177241U CN 212177241 U CN212177241 U CN 212177241U CN 202020746278 U CN202020746278 U CN 202020746278U CN 212177241 U CN212177241 U CN 212177241U
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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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/16—Combined cycle power plant [CCPP], or combined cycle gas turbine [CCGT]
Abstract
A quick starting system of a gas-steam combined cycle unit comprises an ultrafiltration water tank, a flue, a high-pressure steam drum and a low-pressure steam drum; wherein, a low-pressure steam-water system communicated with the low-pressure steam pocket, a high-pressure steam-water system communicated with the high-pressure steam pocket and a hot water heater are arranged in the flue; the water outlet of the ultrafiltration water tank is communicated with the water inlet of the hot water heater through a boiler hot water pump set, and the water outlet of the hot water heater is connected with a low-pressure steam-water system through an electric door I on one hand and is connected with a high-pressure steam-water system through an electric door II on the other hand; the low-pressure steam pocket is communicated with the water inlet of the ultrafiltration water tank through a low-pocket water drain valve and a high-pocket water drain main valve; the high-pressure steam pocket is communicated with the water inlet of the ultrafiltration water tank through a high-pocket water drain door and a high-low pocket water drain main door. During the standby period of the unit, heat is input to the two economizers and the steam pocket through the boiler hot water pump system, and certain flow is kept, so that the water quality of the boiler is always in a qualified state, and the starting speed of the unit is greatly increased.
Description
Technical Field
The utility model relates to a system, concretely relates to quick start-up system of gas steam combined cycle unit.
Background
At present, the gas-steam combined cycle unit has the outstanding characteristics of quick start and stop, and meets the peak regulation requirement of a power grid. However, the water quality standard reaching time before the gas turbine waste heat boiler is started is long, about 3-5 hours are needed from boiler water feeding to normal unit load carrying of a domestic gas turbine, and the starting speed of the unit is seriously influenced by the water quality problem.
In order to increase the starting speed of the waste heat boiler, technical improvement needs to be performed on a water supply system of the unit so as to improve the load response capability of the unit.
Disclosure of Invention
According to the not enough of prior art, the utility model relates to a quick start-up system of gas steam combined cycle unit.
The technical scheme of the utility model is realized according to following method:
a quick starting system of a gas-steam combined cycle unit comprises an ultrafiltration water tank, a flue, a high-pressure steam drum and a low-pressure steam drum; wherein, a low-pressure steam-water system communicated with the low-pressure steam pocket, a high-pressure steam-water system communicated with the high-pressure steam pocket and a hot water heater are arranged in the flue; the water outlet of the ultrafiltration water tank is communicated with the water inlet of the hot water heater through a boiler hot water pump set, and the water outlet of the hot water heater is connected with a low-pressure steam-water system through an electric door I on one hand and is connected with a high-pressure steam-water system through an electric door II on the other hand; the low-pressure steam pocket is communicated with the water inlet of the ultrafiltration water tank through a low-pocket water drain valve and a high-pocket water drain main valve; the high-pressure steam pocket is communicated with the water inlet of the ultrafiltration water tank through a high-pocket water drain door and a high-low pocket water drain main door.
Further, the boiler hot water pump group comprises a #1 boiler hot water pump and a #2 boiler hot water pump;
one end of the #1 boiler hot water pump is communicated with the ultrafiltration water tank through a manual door at the inlet of the #1 boiler hot water pump, and the other end of the #1 boiler hot water pump is communicated with the hot water heater through a manual door at the outlet of the #1 boiler hot water pump;
one end of the #2 boiler hot water pump is communicated with the ultrafiltration water tank through a manual door at the inlet of the #2 boiler hot water pump, and the other end of the #2 boiler hot water pump is communicated with the hot water heater through a manual door at the outlet of the #2 boiler hot water pump.
Further, the low-pressure steam-water system comprises a low-pressure economizer, a low-pressure evaporator and a low-pressure superheater which are connected with the low-pressure steam drum; wherein, the low-pressure economizer is also connected with a hot water heater.
Further, the low-pressure economizer is also connected with a low-pressure water supply system.
Further, the high-pressure steam-water system comprises a high-pressure economizer, a high-pressure evaporator and a high-pressure superheater which are connected with the high-pressure steam drum; wherein, the high-pressure economizer is also connected with a hot water heater.
Further, the high-pressure economizer is also connected with a high-pressure water supply system.
Furthermore, a water inlet of the high-low package water discharge main door is connected with a high-low package water discharge door for discharging unqualified water to a wastewater recovery device.
Furthermore, the low-pressure steam pocket is connected with a low-pocket water drain valve through a low-pocket water drain pipe.
Furthermore, the high-pressure steam pocket is connected with a high-pocket water drain valve through a high-pocket water drain pipe.
Further, the hot water heater is also connected with a bromine machine hot water pump.
The utility model discloses beneficial effect:
the utility model discloses can just can guarantee to have the qualified hot water of a certain amount of quality of water to flow in low pressure economizer and the high pressure economizer through the hot water input heat energy of machine of being close during the unit is reserve, high pressure steam pocket and low pressure steam pocket also can obtain fully preheating, realize that exhaust-heat boiler low energy consumption is reserve. The hot water flow can enable the boiler water energy to meet the water quality requirement quickly before the unit is started, and the starting speed of the gas turbine is greatly improved.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention without limitation. The present invention will be described in detail with reference to the accompanying drawings and examples.
FIG. 1 is a schematic diagram of a rapid start-up system of a gas-steam combined cycle unit according to the present invention;
in the figure, 1 is an ultra-filtration water tank, 2 is a manual door of a #1 boiler hot water pump inlet, 3 is a #1 boiler hot water pump, 4 is a manual door of a #1 boiler hot water pump outlet, 5 is a manual door of a #2 boiler hot water pump inlet, 6 is a #2 boiler hot water pump, 7 is a manual door of a #2 boiler hot water pump outlet, 8 is a bromine machine hot water pump, 9 is a #2 unit hot water heater, 10 is a #2 unit hot water heater, 11 is a #1 unit hot water heater, 12 is an electric door II, 13 is an electric door I, 14 is a high-package water discharge door, 15 is a low-package water discharge door, 16 is a high-low-package water discharge main door, 17 is a high-low-package water discharge door, 18 is a wastewater recovery device, 19 is a low-pressure steam pocket, 20 is a low-pressure economizer, 21 is a low-package water discharge pipe, 22 is a low-pressure evaporator, 23 is a low-pressure steam pocket, 24 is a high-pressure steam pocket, 25 is a high-pressure economizer, 26, A high-pressure evaporator 27, a high-pressure superheater 28, a flue 29, steam turbine exhaust 30, a high-pressure feedwater system 31, a low-pressure feedwater system 32, and a hot water heater 33.
Detailed Description
In order to make the purpose, technical solution and advantages of the present invention clearer, the following will combine the drawings in the embodiments of the present invention to perform more detailed description on the technical solution in the embodiments of the present invention. In the drawings, the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The described embodiments are only some, but not all embodiments of the invention.
The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present invention, and should not be construed as limiting the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention. Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
As shown in fig. 1, a quick start system of a gas-steam combined cycle unit comprises an ultrafiltration water tank 1, a flue 29, a high-pressure steam drum 24 and a low-pressure steam drum 19; wherein, the flue 29 is provided with a low-pressure steam-water system communicated with the low-pressure steam drum 19, a high-pressure steam-water system communicated with the high-pressure steam drum 24 and a hot water heater 33; the water outlet of the ultrafiltration water tank 1 is communicated with the water inlet of a hot water heater 33 through a boiler hot water pump set, and the water outlet of the hot water heater 33 is connected with a low-pressure steam-water system through an electric door I13 on one hand and connected with a high-pressure steam-water system through an electric door II 12 on the other hand; the low-pressure steam pocket 19 is communicated with the water inlet of the ultrafiltration water tank 1 through a low-pocket water discharge door 15 and a high-pocket water discharge main door 16; the high-pressure steam pocket 24 is communicated with the water inlet of the ultrafiltration water tank 1 through the high-pocket water discharge door 14 and the high-low pocket water discharge main door 16.
Note that the flue 29 is entered from the steam turbine exhaust 30, and the hot water heater 33 is also connected to the #2 unit hot water heater.
The following further explains the above embodiments with respect to the boiler hot water pump unit.
With continued reference to fig. 1, the boiler hot water pump group includes a #1 boiler hot water pump 3 and a #2 boiler hot water pump 6; one end of a #1 boiler hot water pump 3 is communicated with the ultrafiltration water tank 1 through a #1 boiler hot water pump inlet manual door 2, and the other end is communicated with a hot water heater 33 through a #1 boiler hot water pump outlet manual door 4; one end of a #2 boiler hot water pump 6 is communicated with the ultrafiltration water tank 1 through a #2 boiler hot water pump inlet manual door 5, and the other end is communicated with a hot water heater 33 through a #2 boiler hot water pump outlet manual door 7.
The above embodiments are further explained with respect to the low pressure steam water system.
With continued reference to FIG. 1, the low pressure steam-water system includes a low pressure economizer 20, a low pressure evaporator 22, and a low pressure superheater 23 connected to a low pressure drum 19; the low-pressure economizer 20 is also connected to a hot water heater 33.
It should be noted that the low-pressure economizer 20 is also connected to a low-pressure water supply system 32.
The above embodiments are further explained with respect to the high pressure steam-water system.
With continued reference to FIG. 1, the high pressure steam-water system includes a high pressure economizer 25 connected to a high pressure drum 24, a high pressure evaporator 27, and a high pressure superheater 28; the high-pressure economizer 25 is also connected to a hot water heater 33.
The high-pressure economizer 25 is also connected to a high-pressure water supply system 31.
Further scheme: the water inlet of the high-low package water discharge main gate 16 is connected with a high-low package water discharge gate 17 for discharging unqualified water to a wastewater recovery device 18.
The preferred scheme is as follows: the low-pressure steam pocket 19 is connected with the low-pocket water drain valve 15 through a low-pocket water drain pipe 21. The high pressure steam drum 24 is connected with the high drum drain 14 through a high drum drain pipe 26. The hot water heater 33 is also connected to the bromine machine hot water pump 8.
The specific embodiment is as follows:
during the standby period of the unit, the #1 boiler hot water pump 3 and the #2 boiler hot water pump 6 pump the water in the ultrafiltration water tank 1 to the hot water heater 33, the hot water passing through the hot water heater 33 enters the low-pressure and high-pressure steam-water system through the electric door 12 II and the electric door I13, the water entering the low-pressure steam drum 19 and the high-pressure steam drum 24 is discharged through the steam drum water discharge pipe, the high-drum water discharge door 14, the low-drum water discharge door 15 and the high-low-drum water discharge main door 16, the water quality reaches the standard and is recycled to the ultrafiltration water tank 1, and the unqualified discharged water is discharged out of the system through the high-low-drum water discharge outer discharge door 17. Before the unit is started, the system is continuously circulated at a small flow rate, so that the water quality is always in a qualified state, and heat can be input for a boiler. The method greatly shortens the time for the water quality to reach the standard before the gas turbine is started and also greatly improves the starting speed of the gas turbine.
Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting the same; although the present invention has been described in detail with reference to preferred embodiments, it should be understood by those skilled in the art that: the invention can be modified or equivalent substituted for some technical features; without departing from the spirit of the present invention, it should be understood that the scope of the claims is intended to cover all such modifications and variations.
Claims (10)
1. The utility model provides a quick start-up system of gas steam combined cycle unit which characterized in that: comprises an ultrafiltration water tank (1), a flue (29), a high-pressure steam drum (24) and a low-pressure steam drum (19);
wherein, a low-pressure steam-water system communicated with the low-pressure steam drum (19), a high-pressure steam-water system communicated with the high-pressure steam drum (24) and a hot water heater (33) are arranged in the flue (29);
the water outlet of the ultrafiltration water tank (1) is communicated with the water inlet of a hot water heater (33) through a boiler hot water pump set, and the water outlet of the hot water heater (33) is connected with a low-pressure steam-water system through an electric door I (13) on one hand and is connected with a high-pressure steam-water system through an electric door II (12) on the other hand;
the low-pressure steam pocket (19) is communicated with the water inlet of the ultrafiltration water tank (1) through a low-pocket water drain valve (15) and a high-low pocket water drain main valve (16);
the high-pressure steam pocket (24) is communicated with the water inlet of the ultrafiltration water tank (1) through a high-pocket water drain valve (14) and a high-low pocket water drain main valve (16).
2. The quick start system of the gas-steam combined cycle unit according to claim 1, characterized in that: the boiler hot water pump group comprises a #1 boiler hot water pump (3) and a #2 boiler hot water pump (6);
one end of the #1 boiler hot water pump (3) is communicated with the ultrafiltration water tank (1) through a #1 boiler hot water pump inlet manual door (2), and the other end of the #1 boiler hot water pump inlet manual door (4) is communicated with the hot water heater (33);
one end of the #2 boiler hot water pump (6) is communicated with the ultrafiltration water tank (1) through a #2 boiler hot water pump inlet manual door (5), and the other end of the #2 boiler hot water pump inlet manual door (7) is communicated with the hot water heater (33).
3. The quick start system of the gas-steam combined cycle unit according to claim 1, characterized in that: the low-pressure steam-water system comprises a low-pressure economizer (20), a low-pressure evaporator (22) and a low-pressure superheater (23), wherein the low-pressure economizer is connected with a low-pressure steam drum (19); wherein, the low-pressure economizer (20) is also connected with a hot water heater (33).
4. The rapid starting system of the gas-steam combined cycle unit as claimed in claim 3, wherein: the low-pressure economizer (20) is also connected with a low-pressure water supply system (32).
5. The quick start system of the gas-steam combined cycle unit according to claim 1, characterized in that: the high-pressure steam-water system comprises a high-pressure economizer (25), a high-pressure evaporator (27) and a high-pressure superheater (28), wherein the high-pressure economizer is connected with a high-pressure steam drum (24); wherein, the high-pressure economizer (25) is also connected with a hot water heater (33).
6. The quick start system of the gas-steam combined cycle unit according to claim 5, characterized in that: the high-pressure economizer (25) is also connected with a high-pressure water supply system (31).
7. The quick start system of the gas-steam combined cycle unit according to claim 1, characterized in that: and a water inlet of the high-low package water discharging main door (16) is connected with a high-low package water discharging outlet door (17) for discharging unqualified water to a wastewater recovery device (18).
8. The quick start system of the gas-steam combined cycle unit according to claim 1, characterized in that: the low-pressure steam pocket (19) is connected with the low-pocket drain valve (15) through a low-pocket drain pipe (21).
9. The quick start system of the gas-steam combined cycle unit according to claim 1, characterized in that: the high-pressure steam pocket (24) is connected with the high-pocket water drain valve (14) through a high-pocket water drain pipe (26).
10. The quick start system of the gas-steam combined cycle unit according to claim 1, characterized in that: the hot water heater (33) is also connected with a bromine machine hot water pump (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020746278.4U CN212177241U (en) | 2020-05-08 | 2020-05-08 | Quick start-up system of gas steam combined cycle unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020746278.4U CN212177241U (en) | 2020-05-08 | 2020-05-08 | Quick start-up system of gas steam combined cycle unit |
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| Publication Number | Publication Date |
|---|---|
| CN212177241U true CN212177241U (en) | 2020-12-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202020746278.4U Expired - Fee Related CN212177241U (en) | 2020-05-08 | 2020-05-08 | Quick start-up system of gas steam combined cycle unit |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113931745A (en) * | 2021-09-18 | 2022-01-14 | 华电电力科学研究院有限公司 | Waste heat boiler system of gas-steam combined cycle unit and starting method thereof |
-
2020
- 2020-05-08 CN CN202020746278.4U patent/CN212177241U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113931745A (en) * | 2021-09-18 | 2022-01-14 | 华电电力科学研究院有限公司 | Waste heat boiler system of gas-steam combined cycle unit and starting method thereof |
| CN113931745B (en) * | 2021-09-18 | 2023-06-16 | 华电电力科学研究院有限公司 | Waste heat boiler system of gas-steam combined cycle unit and starting method thereof |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20201218 Termination date: 20210508 |
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| CF01 | Termination of patent right due to non-payment of annual fee |