CN216745534U - Circulating water drainage system for condensing steam turbine generator unit - Google Patents
Circulating water drainage system for condensing steam turbine generator unit Download PDFInfo
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- CN216745534U CN216745534U CN202122524471.0U CN202122524471U CN216745534U CN 216745534 U CN216745534 U CN 216745534U CN 202122524471 U CN202122524471 U CN 202122524471U CN 216745534 U CN216745534 U CN 216745534U
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Abstract
The utility model provides a circulating water drainage system for a condensing steam turbine generator unit, which mainly solves the problems of more power consumption and energy consumption and longer maintenance period of the existing circulating water drainage system of the condensing steam turbine generator unit. The circulating water drainage system comprises a condenser, a circulating pump pit, a water drawing well, a rainwater well, a circulating water pump, a circulating drainage pump and a water drawing well drainage pump; the inlet of the circulating water pump is communicated with the water drawing well, the outlet of the circulating water pump is respectively communicated with the inlet of the condenser and the heat supply circulating water return pipeline, a first blocking plate is arranged on the outlet pipeline of the circulating water pump, and the outlet of the condenser is respectively communicated with the cooling tower and the heat supply circulating water inlet pipeline; the inlet of the water drawing well drainage pump is communicated with the water drawing well, and the outlet of the water drawing well drainage pump is communicated with the rainwater well; the inlet of the circulating drainage pump is communicated with the circulating pump pit, the outlet of the circulating drainage pump is respectively communicated with the rainwater well and the water drawing well through a first conveying pipeline and a second conveying pipeline, and a first valve and a second valve are arranged on the first conveying pipeline and the second conveying pipeline.
Description
Technical Field
The utility model relates to an operation system of a condensing steam turbine generator unit, in particular to a circulating water discharge system for the condensing steam turbine generator unit.
Background
With diversification of energy supply tasks of power plants, the existing power plants not only undertake social basic energy power generation tasks, but also provide hot steam for urban resident life. Based on the demand of above-mentioned pluralism, will have 4X 300MW turbo generator set to carry out the high back pressure transformation, the steam turbine is transformed into and uses high back pressure rotor electricity generation heat supply in the heat supply season, and non-heat supply season is changed into the pure condensing steam formula rotor electricity generation. Due to the requirement of a thermodynamic system, a blocking plate needs to be additionally arranged on a circulating water system of the condenser in a heating season, so that normal circulation of heating circulating water is realized; when non-heat supply season, need demolish the closure plate, realize the normal cycle of circulating water, at the in-process of changing the closure plate at every turn, need deposit water, discharge ponding in the circulation pump pit with the circulating water system, guarantee going on smoothly of closure plate dismouting work.
When the maintenance work is carried out, namely the plugging plate is replaced, the circulating drainage pump conveys accumulated water in the circulating pump pit to the water drawing well. However, after the circulating drainage pump works for a period of time, the water level of the water suction well is higher than that of the circulating pump pit, water in the water suction well can flow backwards to enter an outlet pipeline of the circulating pump, so that accumulated water in the circulating pump pit cannot be drained in time, at the moment, the submersible pump needs to be added temporarily, water is pumped into the rainwater well from the water suction well, and the water level of the water suction well and the water level of the circulating pump pit meet requirements. However, in the drainage process of the mode, the circulating drainage pump and the water suction well drainage pump need to be operated simultaneously, so that the power consumption is increased, and the overhaul period is prolonged.
Disclosure of Invention
The utility model aims to solve the problems of more power consumption and energy consumption and longer maintenance period of a circulating water drainage system of the existing condensing steam turbine generator unit, and thus the circulating water drainage system for the condensing steam turbine generator unit is provided.
In order to achieve the purpose, the utility model adopts the following technical scheme:
a circulating water drainage system for a condensing steam turbine generator unit comprises a condenser, a circulating pump pit, a water drawing well, a rainwater well, a circulating water pump, a circulating drainage pump and a water drawing well drainage pump; an inlet pipeline of the circulating water pump is communicated with a water drawing well, an outlet pipeline of the circulating water pump is respectively communicated with an inlet of a condenser and a heat supply circulating water return pipeline, a first blocking plate is arranged on the outlet pipeline of the circulating water pump, and an outlet of the condenser is respectively communicated with a cooling tower and a heat supply circulating water inlet pipeline; a first water discharge pipeline and a first water discharge valve are arranged on an outlet pipeline of the circulating water pump, an inlet of the first water discharge pipeline is communicated with the outlet pipeline of the circulating water pump, an outlet of the first water discharge pipeline is communicated with the pump pit, and the first water discharge valve is arranged on the first water discharge pipeline; the inlet pipeline of the water drawing well drainage pump is communicated with the water drawing well, and the outlet pipeline is communicated with the rainwater well; the inlet pipeline of the circulating drainage pump is communicated with the circulating pump pit, the outlet pipeline of the circulating drainage pump is respectively communicated with the rainwater well and the water drawing well through a first conveying pipeline and a second conveying pipeline, and a first valve and a second valve are arranged on the first conveying pipeline and the second conveying pipeline.
Furthermore, a second water discharge pipeline and a second water discharge valve are arranged on an inlet pipeline of the circulating water pump, an inlet of the second water discharge pipeline is connected with the inlet pipeline of the circulating water pump, an outlet of the second water discharge pipeline is connected with the pump pit, and the second water discharge valve is arranged on the second water discharge pipeline.
Furthermore, an inlet pipeline and an outlet pipeline of the circulating water pump are both provided with a first electric valve, and the first electric valve is an electric butterfly valve.
Furthermore, a second blocking plate and a water return valve are arranged on the heat supply circulating water return pipeline.
Furthermore, the circulating drainage pumps are multiple and are arranged in parallel, and an outlet pipeline of each circulating drainage pump is provided with a circulating drainage valve.
Furthermore, the water drawing well drainage pumps are multiple and are arranged in parallel, and an outlet pipeline of each water drawing well drainage pump is provided with a water drawing drainage valve.
Further, the inlet of the condenser is also provided with a second electric valve, and the second electric valve is an electric butterfly valve.
Compared with the prior art, the technical scheme of the utility model has the beneficial effects that:
1. the circulating water drainage system is additionally provided with a pipeline from one path to the rainwater well at the outlet of the circulating drainage pump, and when the circulating drainage system is overhauled, water in a circulating pump pit is directly drained into the rainwater well through the circulating drainage pump, and the drainage pump of the water drawing well does not need to work, so that the defect that the circulating drainage pump and the drainage pump of the water drawing well run simultaneously in the drainage process is overcome, the power consumption and the energy consumption are saved, and the overhaul period is shortened.
2. The circulating water drainage system utilizes the original outlet pipeline of the circulating drainage pump, and has the advantages of small modification workload, small investment and lower cost. Meanwhile, the system can realize flexible switching of the system only by operating the first valve and the second valve of the water drawing well or the rainwater removing well, and the operation is simple and reliable.
Drawings
Fig. 1 is a schematic view of a circulating water drainage system for a condensing steam turbine generator unit according to the present invention.
Reference numerals: 1-a condenser, 2-a circulating pump pit, 3-a water drawing well, 4-a rainwater well, 5-a circulating water pump, 6-a circulating water discharge pump, 7-a water drawing well water discharge pump, 8-a first blocking plate, 9-a first water discharge valve, 10-a first conveying pipeline, 11-a second conveying pipeline, 12-a first valve, 13-a second valve, 14-a second water discharge valve, 15-a first electric valve, 16-a second blocking plate, 17-a water return valve, 18-a circulating water discharge valve, 19-a water drawing water discharge valve and 20-a second electric valve.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood by those skilled in the art that these embodiments are only for explaining the technical principle of the present invention and are not intended to limit the scope of the present invention.
The utility model provides a circulating water drainage system, which is a pump pit drainage system applied to a circulating water pump of a condensing steam turbine generator set. When the maintenance work, water can directly be arranged to the catch basin, has realized the nimble switching of system. The mode not only saves water resources and power consumption of a power plant, but also shortens the maintenance period.
As shown in fig. 1, the circulating water drainage system for a condensing steam turbine generator unit of the present invention includes a condenser 1, a pump pit 2, a water drawing well 3, a rainwater well 4, a circulating water pump 5, a circulating drainage pump 6 and a water drawing well drainage pump 7; an inlet pipeline of the circulating water pump 5 is communicated with the water drawing well 3, an outlet pipeline is respectively communicated with an inlet of the condenser 1 and a heat supply circulating water return pipeline, a first blocking plate 8 is arranged on an outlet pipeline of the circulating water pump 5, and an outlet of the condenser 1 is respectively communicated with a cooling tower and a heat supply circulating water inlet pipeline; a first water discharge pipeline and a first water discharge valve 9 are arranged on an outlet pipeline of the circulating water pump 5, an inlet of the first water discharge pipeline is communicated with an outlet pipeline of the circulating water pump 5, an outlet of the first water discharge pipeline is communicated with the circulating pump pit 2, and the first water discharge valve 9 is arranged on the first water discharge pipeline; an inlet pipeline of a water drawing well drainage pump 7 is communicated with the water drawing well 3, and an outlet pipeline is communicated with the rainwater well 4; an inlet pipeline of the circulating drainage pump 6 is communicated with the circulating pump pit 2, an outlet pipeline of the circulating drainage pump 6 is respectively communicated with the rainwater well 4 and the water drawing well 3 through a first conveying pipeline 10 and a second conveying pipeline 11, and a first valve 12 and a second valve 13 are arranged on the first conveying pipeline 10 and the second conveying pipeline 11.
In this embodiment, a second water discharge pipeline and a second water discharge valve 14 are further disposed on the inlet pipeline of the circulating water pump 5, an inlet of the second water discharge pipeline is connected to the inlet pipeline of the circulating water pump 5, an outlet of the second water discharge pipeline is connected to the circulating pump pit 2, and the second water discharge valve 14 is disposed on the second water discharge pipeline.
In this embodiment, the inlet pipeline and the outlet pipeline of the circulating water pump 5 are both provided with a first electric valve 15, and the first electric valve 15 can be an electric butterfly valve. The inlet of the condenser 1 is also provided with a second electric valve 20, and the second electric valve 20 is an electric butterfly valve. And a second blocking plate 16 and a water return valve 17 are also arranged on the heat supply circulating water return pipeline.
In the present embodiment, there are a plurality of the recycle drain pumps 6, a plurality of the recycle drain pumps 6 are arranged in parallel, and an outlet pipeline of each of the recycle drain pumps 6 is provided with a recycle drain valve 18. The number of the water drawing well water discharging pumps 7 is multiple, the water drawing well water discharging pumps 7 are arranged in parallel, and a water drawing water discharging valve 19 is arranged on an outlet pipeline of each water drawing well water discharging pump 7.
The condensing steam turbine generator unit uses the high back pressure rotor to generate and supply heat in the heat supply season, and the pure condensing steam rotor is used to generate electricity in the non-heat supply season. In a heating season, a first blocking plate 8 is additionally arranged on a circulating water system on one side of the condenser 1, circulating water enters a heating circulating water inlet pipeline from an outlet of the condenser 1, and after heating of the heating circulating water is achieved, the circulating water returns to an inlet of the condenser 1 from a heating circulating water return pipeline, and normal circulation of the heating circulating water is achieved. In non-heat supply seasons, the first blocking plate 8 is removed, the second blocking plate 16 is additionally arranged or a valve on a heat supply circulating water pipeline is closed, circulating water is conveyed from the water drawing well 3 to the inlet of the condenser 1 through the circulating water pump 5, and circulating water at the outlet of the condenser 1 is conveyed to the cooling tower to realize cooling, so that normal circulation of the circulating water is realized.
At every turn at the in-process of changing first closure plate 8, need deposit water, the interior ponding of circulation system pump pit 2 is discharged, guarantees going on smoothly of 8 dismouting work of first closure plate, need open first valve 9 that drains this moment, deposit water with circulation system and arrange to pump pit 2 that circulates, ponding passes through circulating drain pump 6 and first pipeline 10 directly discharges to rainwater well 4 in the pump pit 2 that circulates.
The system only adds a pipeline to the rainwater well 4, the circulating drainage pump directly discharges water in the circulating pump pit to the rainwater well, and the water drawing well drainage pump does not need to work, so that the defect that the circulating drainage pump and the water drawing well drainage pump simultaneously operate in the drainage process is overcome, the power consumption and the energy consumption are saved, and the overhaul period is shortened. Meanwhile, the system utilizes the original outlet pipeline of the circulating drainage pump, so that the reconstruction workload is small and the investment is particularly small. In addition, the system only needs to operate the valves of the water drawing well 3 or the rainwater removing well 4 to realize flexible switching of the system.
Claims (7)
1. A circulating water drainage system for a condensing steam turbine generator unit comprises a condenser (1), a circulating pump pit (2), a water drawing well (3), a rainwater well (4), a circulating water pump (5), a circulating drainage pump (6) and a water drawing well drainage pump (7);
an inlet pipeline of the circulating water pump (5) is communicated with the water drawing well (3), an outlet pipeline is respectively communicated with an inlet of the condenser (1) and a heat supply circulating water return pipeline, a first blocking plate (8) is arranged on an outlet pipeline of the circulating water pump (5), and an outlet of the condenser (1) is respectively communicated with a cooling tower and a heat supply circulating water inlet pipeline; a first water discharge pipeline and a first water discharge valve (9) are arranged on an outlet pipeline of the circulating water pump (5), an inlet of the first water discharge pipeline is communicated with an outlet pipeline of the circulating water pump (5), an outlet of the first water discharge pipeline is communicated with the circulating pump pit (2), and the first water discharge valve (9) is arranged on the first water discharge pipeline; an inlet pipeline of the water drawing well drainage pump (7) is communicated with the water drawing well (3), and an outlet pipeline is communicated with the rainwater well (4);
the method is characterized in that:
an inlet pipeline of the circulating drainage pump (6) is communicated with the circulating pump pit (2), an outlet pipeline of the circulating drainage pump (6) is communicated with the rainwater well (4) and the water drawing well (3) through a first conveying pipeline (10) and a second conveying pipeline (11) respectively, a first valve (12) is arranged on the first conveying pipeline (10), and a second valve (13) is arranged on the second conveying pipeline (11).
2. A circulating water discharge system for a condensing steam turbine generator unit according to claim 1, characterized in that: and a second water discharging pipeline and a second water discharging valve (14) are arranged on an inlet pipeline of the circulating water pump (5), an inlet of the second water discharging pipeline is connected with an inlet pipeline of the circulating water pump (5), an outlet of the second water discharging pipeline is connected with the circulating pump pit (2), and the second water discharging valve (14) is arranged on the second water discharging pipeline.
3. A circulating water discharge system for a condensing steam turbine generator unit according to claim 1, characterized in that: and the inlet pipeline and the outlet pipeline of the circulating water pump (5) are both provided with a first electric valve (15), and the first electric valve (15) is an electric butterfly valve.
4. A circulating water discharge system for a condensing steam turbine generator unit according to claim 1, 2 or 3, characterized in that: and a second blocking plate (16) and a water return valve (17) are arranged on the heat supply circulating water return pipeline.
5. A circulating water discharge system for a condensing steam turbine generator unit according to claim 4, characterized in that: the circulating drainage pumps (6) are multiple, the circulating drainage pumps (6) are arranged in parallel, and a circulating drainage valve (18) is arranged at an outlet of each circulating drainage pump (6).
6. A circulating water discharge system for a condensing steam turbine generator unit according to claim 5, characterized in that: the water drawing well drainage pumps (7) are multiple, the water drawing well drainage pumps (7) are arranged in parallel, and a water drawing drainage valve (19) is arranged at the outlet of each water drawing well drainage pump (7).
7. A circulating water discharge system for a condensing steam turbine generator unit according to claim 6, characterized in that: the inlet of the condenser (1) is also provided with a second electric valve (20), and the second electric valve (20) is an electric butterfly valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122524471.0U CN216745534U (en) | 2021-10-20 | 2021-10-20 | Circulating water drainage system for condensing steam turbine generator unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122524471.0U CN216745534U (en) | 2021-10-20 | 2021-10-20 | Circulating water drainage system for condensing steam turbine generator unit |
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| Publication Number | Publication Date |
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| CN216745534U true CN216745534U (en) | 2022-06-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122524471.0U Active CN216745534U (en) | 2021-10-20 | 2021-10-20 | Circulating water drainage system for condensing steam turbine generator unit |
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2021
- 2021-10-20 CN CN202122524471.0U patent/CN216745534U/en active Active
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