CN215951374U - Circulating water system arrangement structure of 1000MW secondary reheating unit - Google Patents
Circulating water system arrangement structure of 1000MW secondary reheating unit Download PDFInfo
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- CN215951374U CN215951374U CN202122444280.3U CN202122444280U CN215951374U CN 215951374 U CN215951374 U CN 215951374U CN 202122444280 U CN202122444280 U CN 202122444280U CN 215951374 U CN215951374 U CN 215951374U
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Abstract
The utility model relates to a circulating water system arrangement structure of a 1000MW double reheating unit. At present, along with feed pump steam turbine condenser sets up alone, two condensers have appeared in making a unit, main steam turbine condenser and feed pump steam turbine condenser promptly. The utility model provides a circulating water system arrangement structure of 1000MW double reheat unit, its constitution includes: the small-sized gas condenser comprises a small-sized gas condenser (9) and a main engine gas condenser (10), wherein the small-sized gas condenser is divided into a small-sized gas condenser A area and a small-sized gas condenser B area, the small-sized gas condenser A area is respectively connected with an A-side circulating water inlet pipe (1) and an A-side circulating water outlet pipe (3), the small-sized gas condenser B area is respectively connected with a B-side circulating water inlet pipe (2) and a B-side circulating water outlet pipe (4), the outer ring of the main engine gas condenser is respectively connected with an outer ring circulating water inlet pipe (5) and an outer ring circulating water outlet pipe (7), and the inner ring of the main engine gas condenser is respectively connected with a main engine gas condenser inner ring circulating water inlet pipe (6) and an inner ring circulating water outlet pipe (8); the utility model is applied to the field of thermal power.
Description
Technical Field
The utility model relates to a circulating water system of a 1000MW double reheating unit.
Background
In order to realize the principles of economic, applicable, safe and reliable equipment design and model selection in engineering construction, a capacity configuration scheme of 1 multiplied by 100 percent of the capacity of a steam feed pump of a 1000MW ultra-supercritical secondary reheating unit is adopted, and compared with a traditional 2 multiplied by 50 percent capacity configuration scheme, the initial investment can be saved by 100 ten thousand yuan.
In the configuration scheme of the capacity steam-driven water-feeding pump, a water-feeding pump core cladding inlet drives a steam turbine for a water-feeding pump to be driven by a domestic steam turbine, the domestic steam turbine for the water-feeding pump is driven by an independent condenser system, the overall efficiency of the pump group is improved by 3.5%, the steam is not discharged into a large condenser along with the steam discharged by a small machine for driving, the back pressure of a main machine condenser and the back pressure of a small machine condenser are both reduced by 0.2kPa, and the back pressure of the main machine can be reduced to 4.99 kPa.
To millions of twice reheating power plants constructed on the coastal region, two condensers, namely a main turbine condenser and a feed pump turbine condenser, appear on one unit along with the independent setting of the feed pump turbine condenser.
Disclosure of Invention
The utility model aims to provide a circulating water system of a 1000MW double reheating unit.
The above purpose is realized by the following technical scheme:
a circulating water system of a 1000MW double reheating unit comprises: the small condenser is divided into a small condenser A area and a small condenser B area, wherein the small condenser A area is respectively connected with a side A circulating water inlet pipe and a side A circulating water outlet pipe, and the small condenser B area is respectively connected with a side B circulating water inlet pipe and a side B circulating water outlet pipe; the main engine condenser is divided into a main engine condenser inner ring and a main engine condenser outer ring, wherein the main engine condenser outer ring is respectively connected with an outer ring circulating water inlet pipe and an outer ring circulating water outlet pipe, and the main engine condenser inner ring is respectively connected with the main engine condenser inner ring circulating water inlet pipe and the main engine condenser inner ring circulating water outlet pipe;
the circulating water inlet pipe at the side A and the circulating water inlet pipe at the side B of the small condenser and the circulating water inlet pipe at the outer ring and the circulating water inlet pipe at the inner ring of the main air condenser are respectively connected with a water supply main pipe, and the circulating water outlet pipe at the side A and the circulating water outlet pipe at the side B and the circulating water outlet pipe at the outer ring and the circulating water outlet pipe at the inner ring of the main air condenser are respectively connected with a water return main pipe;
an A-side circulating water inlet pipe, a B-side circulating water inlet pipe, an A-side circulating water outlet pipe and a B-side circulating water outlet pipe on the small condenser are respectively connected with an electric butterfly valve;
and an outer ring circulating water inlet pipe, an inner ring circulating water inlet pipe, an outer ring circulating water outlet pipe and an inner ring circulating water outlet pipe on the main engine gas condenser are respectively connected with an electric butterfly valve.
The utility model has the beneficial effects that:
1. the utility model adopts a 100 percent capacity steam-driven feed pump in a 1000MW double reheating unit, a small condenser and a main machine condenser adopted by a domestic turbine for driving the feed pump are jointly cooled by one path of seawater circulation, and water inlet and return isolation valves are respectively and independently arranged, thus the control is flexible.
The utility model has the following main characteristics:
(1) a proposal of a steam feed water pump with 100 percent capacity is adopted in a 1000MW secondary reheating unit;
(2) in the selection of the 100% capacity water supply pump, a scheme that the domestic small turbine is used for driving and is provided with an independent domestic condenser system is adopted.
(3) The domestic small turbine condenser and the main machine condenser are jointly cooled by one path of seawater circulation, and are respectively and independently provided with a water inlet isolation valve and a water return isolation valve, so that the control is flexible.
Description of the drawings:
FIG. 1 is a schematic structural diagram of the present invention.
In the figure: 1. the system comprises an A side circulating water inlet pipe, 2 and B side circulating water inlet pipes, 3 and A side circulating water outlet pipes, 4 and B side circulating water outlet pipes, 5 and an outer ring circulating water inlet pipe, 6 and an inner ring circulating water inlet pipe, 7 and an outer ring circulating water outlet pipe, 8 and an inner ring circulating water outlet pipe, 9 and a small condenser, 10 and a main engine condenser, 11. a water supply main pipe, 12 and a water return main pipe, 13 and an electric butterfly valve.
The specific implementation mode is as follows:
example 1:
a circulating water system of a 1000MW double reheating unit comprises: the small-scale gas condenser comprises a small-scale gas condenser 9 and a main engine gas condenser 10, wherein the small-scale gas condenser is divided into a small-scale gas condenser A area and a small-scale gas condenser B area, the small-scale gas condenser A area is respectively connected with an A-side circulating water inlet pipe 1 and an A-side circulating water outlet pipe 3, the small-scale gas condenser B area is respectively connected with a B-side circulating water inlet pipe 2 and a B-side circulating water outlet pipe 4, and the main engine gas condenser is respectively connected with an outer ring circulating water inlet pipe 5, an inner ring circulating water inlet pipe 6, an outer ring circulating water outlet pipe 7 and an inner ring circulating water outlet pipe 8;
an A side circulating water inlet pipe and a B side circulating water inlet pipe of the small condenser and an outer ring circulating water inlet pipe and an inner ring circulating water inlet pipe of the main air condenser are respectively connected with a water supply main pipe 11, and an A side circulating water outlet pipe and a B side circulating water outlet pipe and an outer ring circulating water outlet pipe and an inner ring circulating water outlet pipe of the main air condenser are respectively connected with a water return main pipe 12;
an A-side circulating water inlet pipe, a B-side circulating water inlet pipe, an A-side circulating water outlet pipe and a B-side circulating water outlet pipe on the small condenser are respectively connected with an electric butterfly valve 13;
and an outer ring circulating water inlet pipe, an inner ring circulating water inlet pipe, an outer ring circulating water outlet pipe and an inner ring circulating water outlet pipe on the main engine gas condenser are respectively connected with an electric butterfly valve.
Example 2:
(1) a water supply flow:
the circulating cooling water adopts a direct-current water supply system, and the flow of the water supply system is as follows: the box culvert takes the seawater deeply → the open diversion channel → the box culvert → the front water intake pool → the circulating water pump → the main pipe of the circulating water supply → the host/condenser of the small machine → the main pipe of the circulating water return-the open drainage channel-the seawater.
(2) The control mode is as follows:
after seawater is taken, the seawater enters a circulating water supply main pipe through the pressure boosting of a circulating water pump, and the circulating cooling water inlet of a small machine condenser and the circulating cooling water inlet of a main machine condenser can be realized by controlling a circulating water inlet pipe at the A side, a circulating water outlet pipe at the A side, a valve bank on the circulating water inlet pipe at the B side and a valve bank on the circulating water outlet pipe at the B side, an outer ring circulating water inlet pipe, an inner ring circulating water inlet pipe, an outer ring circulating water outlet pipe and a valve bank on the inner ring circulating water outlet pipe according to the running states of the main machine and the small machine.
For example: opening a valve of a circulating water inlet pipe at the side A and a valve of a circulating water outlet pipe at the side A, so that cooling water through flow can be formed at the side A (subarea) of the small condenser; and closing the valve of the circulating water inlet pipe at the A side and closing the valve of the circulating water outlet pipe at the A side can ensure that the water cannot flow into the A side (subarea) of the condenser.
Claims (1)
1. A circulating water system of a 1000MW double reheating unit comprises: little machine condenser and host computer condenser, characterized by: the small machine gas condenser is divided into a small machine gas condenser A area and a small machine gas condenser B area, wherein the small machine gas condenser A area is respectively connected with a side A circulating water inlet pipe and a side A circulating water outlet pipe, and the small machine gas condenser B area is respectively connected with a side B circulating water inlet pipe and a side B circulating water outlet pipe; the main engine condenser is divided into a main engine condenser inner ring and a main engine condenser outer ring, wherein the main engine condenser outer ring is respectively connected with an outer ring circulating water inlet pipe and an outer ring circulating water outlet pipe, and the main engine condenser inner ring is respectively connected with the main engine condenser inner ring circulating water inlet pipe and the main engine condenser inner ring circulating water outlet pipe;
the circulating water inlet pipe at the side A and the circulating water inlet pipe at the side B of the small condenser and the circulating water inlet pipe at the outer ring and the circulating water inlet pipe at the inner ring of the main air condenser are respectively connected with a water supply main pipe, and the circulating water outlet pipe at the side A and the circulating water outlet pipe at the side B and the circulating water outlet pipe at the outer ring and the circulating water outlet pipe at the inner ring of the main air condenser are respectively connected with a water return main pipe;
an A-side circulating water inlet pipe, a B-side circulating water inlet pipe, an A-side circulating water outlet pipe and a B-side circulating water outlet pipe on the small condenser are respectively connected with an electric butterfly valve;
and an outer ring circulating water inlet pipe, an inner ring circulating water inlet pipe, an outer ring circulating water outlet pipe and an inner ring circulating water outlet pipe on the main engine gas condenser are respectively connected with an electric butterfly valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122444280.3U CN215951374U (en) | 2021-10-11 | 2021-10-11 | Circulating water system arrangement structure of 1000MW secondary reheating unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122444280.3U CN215951374U (en) | 2021-10-11 | 2021-10-11 | Circulating water system arrangement structure of 1000MW secondary reheating unit |
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| Publication Number | Publication Date |
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| CN215951374U true CN215951374U (en) | 2022-03-04 |
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| CN202122444280.3U Active CN215951374U (en) | 2021-10-11 | 2021-10-11 | Circulating water system arrangement structure of 1000MW secondary reheating unit |
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2021
- 2021-10-11 CN CN202122444280.3U patent/CN215951374U/en active Active
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