CN113492144B - Nuclear power station drain tank flushing system, method and equipment - Google Patents
Nuclear power station drain tank flushing system, method and equipment Download PDFInfo
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- CN113492144B CN113492144B CN202110640047.4A CN202110640047A CN113492144B CN 113492144 B CN113492144 B CN 113492144B CN 202110640047 A CN202110640047 A CN 202110640047A CN 113492144 B CN113492144 B CN 113492144B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B9/00—Cleaning hollow articles by methods or apparatus specially adapted thereto
- B08B9/08—Cleaning containers, e.g. tanks
- B08B9/093—Cleaning containers, e.g. tanks by the force of jets or sprays
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B9/00—Cleaning hollow articles by methods or apparatus specially adapted thereto
- B08B9/08—Cleaning containers, e.g. tanks
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Abstract
The invention belongs to the technical field of nuclear island exhaust and drainage systems, and particularly relates to a flushing system, method and equipment for a nuclear power station drain tank. The flushing system of the nuclear power station drain tank can flush the first separation drain tank by utilizing desalted water in the first flushing pipeline and condensed water in the fifth flushing pipeline; the first regeneration hydrophobic tank can be flushed by desalted water in the second flushing pipeline and condensed water in the sixth flushing pipeline; the second separation drain tank can be flushed by the desalted water in the third flushing pipeline and the condensed water in the seventh flushing pipeline; the second regenerated header may be flushed with demineralized water in a fourth flush line and condensate in an eighth flush line. According to the flushing system for the drain tank of the nuclear power station, the flushing efficiency of the drain tank is improved, and the flushing time is shortened.
Description
Technical Field
The invention belongs to the technical field of nuclear island exhaust and drainage systems, and particularly relates to a flushing system, method and equipment for a nuclear power station drain tank.
Background
Steam generated by a steam turbine set of a nuclear power station is saturated steam, the saturated steam is converted into wet steam with the water content of 10% -15% after entering a high-pressure cylinder of a steam turbine for preliminary expansion and work application, and if the wet steam is directly discharged into a low-pressure cylinder of the steam turbine for continuous expansion and work application, the water content of the wet steam of the low-pressure cylinder reaches 20% -25%.
The wet steam can greatly reduce the operating efficiency of the steam turbine set and can cause erosion damage to the blades of the low pressure cylinder, while also causing the blades of the low pressure cylinder to vibrate, thereby leaving a potential safety hazard to the steam turbine. Therefore, a steam-water separation regenerator is required to be arranged between the high-pressure cylinder and the low-pressure cylinder, the steam-water separation regenerator can separate moisture in wet steam at the outlet of the high-pressure cylinder and send the moisture to a heater to reduce the humidity of the steam, and the steam after steam-water separation can be heated to improve the temperature of the steam, so that the aim of improving the power generation efficiency of the steam turbine is fulfilled. During the process of separating and heating steam by the steam-water separation regenerator, most of the steam can be changed into water, and the water enters the separation drain tank and the regeneration drain tank respectively.
Because separation drain tank and regeneration drain tank can lead to getting into the quality of water of catch water regenerator unqualified because of reasons such as rust, cause the threat to nuclear power station two return circuits, consequently, before catch water regenerator is put into operation, need wash separation drain tank and regeneration drain tank. In the prior art, the problems of long washing time, low washing efficiency and the like exist in the washing of the separation drain tank and the regeneration drain tank.
Disclosure of Invention
The invention provides a flushing system, method and equipment for a nuclear power station drain tank, aiming at the technical problems of long flushing time, low flushing efficiency and the like existing in the flushing of a separation drain tank and a regeneration drain tank in the prior art.
In view of the above problems, an embodiment of the present invention provides a nuclear power plant drain tank flushing system, including a demineralized water flushing loop and a condensate flushing loop;
the demineralized water flushing loop comprises a first flushing pipeline provided with a first valve, a second flushing pipeline provided with a second valve, a third flushing pipeline provided with a third valve and a fourth flushing pipeline provided with a fourth valve; the first flushing pipeline, the second flushing pipeline, the third flushing pipeline and the fourth flushing pipeline are all communicated with the demineralized water supply system of the nuclear power station, one end, away from the demineralized water supply system of the nuclear power station, of the first flushing pipeline is communicated with a first separation drain tank of a first steam-water separation regenerator, one end, away from the demineralized water supply system of the nuclear power station, of the second flushing pipeline is communicated with a first regeneration drain tank of the first steam-water separation regenerator, one end, away from the demineralized water supply system of the nuclear power station, of the third flushing pipeline is communicated with a second separation drain tank of a second steam-water separation regenerator, and one end, away from the demineralized water supply system of the nuclear power station, of the fourth flushing pipeline is communicated with a second regeneration drain tank of the second steam-water separation regenerator;
the condensed water flushing loop comprises a fifth flushing pipeline provided with a fifth valve, a sixth flushing pipeline provided with a sixth valve, a seventh flushing pipeline provided with a seventh valve and an eighth flushing pipeline provided with an eighth valve; one end of the fifth flushing pipeline is communicated with a condensate water circulation loop of the nuclear power station, and the other end of the fifth flushing pipeline is communicated with the first separation drain tank; one end of the sixth flushing pipeline is communicated with a condensate water circulation loop of the nuclear power plant, and the other end of the sixth flushing pipeline is communicated with the first regeneration water drainage tank; one end of the seventh flushing pipeline is communicated with a condensate water circulation loop of the nuclear power plant, and the other end of the seventh flushing pipeline is communicated with the second separation drain tank; one end of the eighth flushing pipeline is communicated with the condensate water circulation loop of the nuclear power plant, and the other end of the eighth flushing pipeline is communicated with the second regeneration drain tank.
Another embodiment of the present invention further provides a method for flushing a nuclear power plant steam trap, which is applied to the nuclear power plant steam trap flushing system, and includes:
receiving a flushing instruction, and after detecting that the condensed water in the condensed water circulation loop of the nuclear power station is qualified, simultaneously carrying out the following flushing steps:
controlling the first valve and the fifth valve to be conducted, so that the desalted water in the first flushing pipeline and the condensed water in the fifth flushing pipeline flush the first separation drain tank simultaneously;
controlling the second valve and the sixth valve to be conducted, so that the desalted water in the second flushing pipeline and the condensed water in the sixth flushing pipeline flush the first regeneration water drainage tank simultaneously;
controlling the third valve and the seventh valve to be conducted, so that the desalted water in the third flushing pipeline and the condensed water in the seventh flushing pipeline flush the second separation drain tank simultaneously;
controlling the fourth valve and the eighth valve to be conducted, so that the desalted water in the fourth flushing pipeline and the condensed water in the eighth flushing pipeline flush the second regeneration drain tank simultaneously;
after the water quality in the first separation drain tank is detected to reach the standard, closing the first valve and the fifth valve;
after the water quality in the first regeneration water-repellent tank is detected to reach the standard, closing the second valve and the sixth valve;
after the water quality in the second separation drain tank is detected to reach the standard, closing the third valve and the seventh valve;
and after the water quality in the second regeneration drain tank is detected to reach the standard, closing the fourth valve and the eighth valve.
Yet another embodiment of the present invention further provides a computer apparatus comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor, when executing the computer program, implements the nuclear power plant steam trap flushing method described above.
In the present invention, the first flushing pipe may flush the first separation trap with demineralized water in a demineralized water supply system of the nuclear power plant, and the fifth flushing pipe may flush the first separation trap with condensate in a condensate circulation loop of the nuclear power plant; the second flush line may flush a first regenerable hydrophobic tank with demineralized water in a nuclear power plant demineralized water supply system, and the sixth flush line may clean the first regenerable hydrophobic tank with condensate in a nuclear power plant condensate loop; the third flush line may flush a second separation trap with demineralized water from the demineralized water supply system of the nuclear power plant, and the seventh flush line may flush the second separation trap with condensate from the condensate loop of the nuclear power plant; the fourth flush line may flush a second regeneration header with the demineralized water from the demineralized water supply system of the nuclear power plant, and the eighth flush line may flush the second regeneration header with the condensate from the condensate loop of the nuclear power plant; thereby two steam trap casees of first steam-water separation regenerator and two steam trap casees of second steam-water separation regenerator all can be washed it by independent pipeline, have improved the efficiency of washing and the quality of washing of first steam-water separation regenerator and second steam-water separation regenerator, have shortened the time of washing.
In addition, because the condensate in the condensate circulation loop of the nuclear power station can be recycled, when the condensate in the condensate circulation loop cannot clean the first steam-water separation regenerator and the second steam-water separation regenerator, the first steam-water separation regenerator can be washed through the first washing pipeline and the second washing pipeline, and the second steam-water separation regenerator can be washed through the third washing pipeline and the fourth washing pipeline, so that the washing efficiency of the first steam-water separation regenerator and the second steam-water separation regenerator is further improved.
Drawings
The invention is further illustrated with reference to the following figures and examples.
FIG. 1 is a schematic view of a nuclear power plant trap flushing system according to an embodiment of the present invention.
The reference numerals in the specification are as follows:
1. a demineralized water flush loop; 11. a first flush line; 111. a first valve; 12. a second flushing line; 121. a second valve; 13. a third flushing line; 131. a third valve; 14. a fourth flushing line; 141. a fourth valve; 15. a high-level water tank;
2. washing the loop with condensed water; 21. a fifth flushing line; 211. a fifth valve; 22. a sixth flushing line; 221. a sixth valve; 23. a seventh flushing line; 231. a seventh valve; 24. an eighth flushing line; 241. an eighth valve; 25. a water supply line; 251. a water pump; 252. a water supply valve; 26. a condenser; 27. a first return conduit; 271. a first shut-off valve; 28. a second return conduit; 281. a second shutoff valve; 29. a third return conduit; 291. a third shutoff valve; 201. a fourth return conduit; 2011. a fourth shutoff valve; 202. a first circulation duct; 2021. a fifth shutoff valve; 203. a second circulation duct; 2031. a sixth shutoff valve; 204. a third flow-through conduit; 2041. a seventh shutoff valve; 205. a fourth flow conduit; 2051. an eighth shutoff valve;
3. a first steam-water separation regenerator; 31. a first separation drain tank; 32. a first regeneration hydrophobic tank; 4. a second steam-water separation regenerator; 41. a second separation drain tank; 42. a second regeneration drain tank; 5. a demineralized water supply system of the nuclear power station; 6. a condensate water circulation loop of the nuclear power station; 7. provided is a high-pressure feed water heating system of a nuclear power station.
Detailed Description
In order to make the technical problems, technical solutions and advantageous effects solved by the present invention more clearly apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
It is to be understood that the terms "upper", "lower", "left", "right", "front", "rear", "middle", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are only for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, should not be construed as limiting the present invention.
Illustratively, the various valves found in the present application include, but are not limited to, solenoid valves, manual valves, and the like.
As shown in fig. 1, an embodiment of the present invention provides a nuclear power plant steam trap flushing system, which includes a demineralized water flushing loop 1 and a condensate flushing loop 2; it will be understood that the demineralized water being transported in the demineralized water circuit 1 is demineralized water in a nuclear power plant, and that the condensed water being transported in the condensed water circuit 2 is condensed water, which has a relatively large and long length of pipe in the circuit 2 and inside which the condensed water may fail.
The demineralized water flushing circuit 1 comprises a first flushing pipeline 11 provided with a first valve 111, a second flushing pipeline 12 provided with a second valve 121, a third flushing pipeline 13 provided with a third valve 131, and a fourth flushing pipeline 14 provided with a fourth valve 141; the first flushing pipeline 11, the second flushing pipeline 12, the third flushing pipeline 13 and the fourth flushing pipeline 14 are all communicated with the demineralized water supply system 5 of the nuclear power station, one end, far away from the demineralized water supply system 5 of the nuclear power station, of the first flushing pipeline 11 is communicated with a first separation drain tank 31 of the first steam-water separation regenerator 3, one end, far away from the demineralized water supply system 5 of the nuclear power station, of the second flushing pipeline 12 is communicated with a first regeneration drain tank 32 of the first steam-water separation regenerator 3, one end, far away from the demineralized water supply system 5 of the nuclear power station, of the third flushing pipeline 13 is communicated with a second separation drain tank 41 of the second steam-water separation regenerator 4, and one end, far away from the demineralized water supply system 5 of the nuclear power station, of the fourth flushing pipeline 14 is communicated with a second regeneration drain tank 42 of the second steam-water separation regenerator 4.
Specifically, the first valve 111 may control the on/off of the first flushing pipe 11, the second valve 121 may control the on/off of the second flushing pipe 12, the third valve 131 may control the on/off of the third flushing pipe 13, and the fourth valve 141 may control the on/off of the fourth flushing pipe 14.
The condensed water flushing loop 2 comprises a fifth flushing pipeline 21 provided with a fifth valve 211, a sixth flushing pipeline 22 provided with a sixth valve 221, a seventh flushing pipeline 23 provided with a seventh valve 231, and an eighth flushing pipeline 24 provided with an eighth valve 241; one end of the fifth flushing pipeline 21 is communicated with the condensate water circulation loop 6 of the nuclear power plant, and the other end of the fifth flushing pipeline 21 is communicated with the first separation drain tank 31; one end of the sixth flushing pipeline 22 is communicated with the condensate water circulation loop 6 of the nuclear power plant, and the other end of the sixth flushing pipeline 22 is communicated with the first regeneration water drainage tank 32; one end of the seventh flushing pipeline 23 is communicated with the condensate water circulation loop 6 of the nuclear power plant, and the other end of the seventh flushing pipeline 23 is communicated with the second separation drain tank 41; one end of the eighth flushing pipeline 24 is communicated with the condensate water circulation loop 6 of the nuclear power plant, and the other end of the eighth flushing pipeline 24 is communicated with the second regeneration drain tank 42.
Specifically, the fifth valve 211 may control on/off of the fifth flushing pipe 21, the sixth valve 221 may control on/off of the sixth flushing pipe 22, the seventh valve 231 may control on/off of the seventh flushing pipe 23, and the eighth valve 241 may control on/off of the eighth flushing pipe 24.
Furthermore, the first steam-water separation regenerator 3 and the second steam-water separation regenerator 4 are connected in parallel, and both can input the wet steam output by the high-pressure cylinder of the steam turbine after steam-water separation and reheating to the low-pressure cylinder of the steam turbine, so as to improve the power generation efficiency of the steam turbine. The first steam-water separation regenerator 3 separates the wet steam output by the high-pressure cylinder of the steam turbine to generate water, and stores the water in the first separation drain tank 31; the moisture produced by the steam-water separation regenerator to the wet steam heating chamber is stored in the first regeneration water-dredging tank 32. And the function of the second separation drain tank 41 is the same as that of the first separation drain tank 31, and the function of the second regeneration drain tank 42 is the same as that of the first regeneration drain tank 32, and thus the description thereof will be omitted.
In the present invention, the first flushing pipe 11 may flush the first separation trap 31 with demineralized water from the nuclear power plant demineralized water supply system 5, and the fifth flushing pipe 21 may flush the first separation trap 31 with condensate from the nuclear power plant condensate loop 6; the second flush line 12 may flush the first regenerable hydrophobic tank 32 with demineralized water from the nuclear power plant demineralized water supply system 5, and the sixth flush line 22 may flush the first regenerable hydrophobic tank 32 with condensate from the nuclear power plant condensate loop 6; the third flushing pipe 13 can flush the second separation trap 41 with demineralized water from the plant demineralized water supply system 5, and the seventh flushing pipe 23 can flush the second separation trap 41 with condensate from the plant condensate loop 6; the fourth flushing pipe 14 may flush the second regenerative drain tank 42 with demineralized water from the nuclear power plant demineralized water supply system 5, and the eighth flushing pipe 24 may flush the second regenerative drain tank 42 with condensate from the nuclear power plant condensate water circulation loop 6; thereby two steam traps of first steam-water separation regenerator 3 with two steam traps of second steam-water separation regenerator 4 can all be washed it by independent pipeline, have improved the washing efficiency and the washing quality of first steam-water separation regenerator 3 and second steam-water separation regenerator 4, have shortened the flushing time.
In addition, since the condensed water in the condensed water circulation circuit 6 of the nuclear power plant can be recycled, when the condensed water therein cannot clean the first steam-water separation regenerator 3 and the second steam-water separation regenerator 4, the first steam-water separation regenerator 3 can be flushed through the first flushing pipeline 11 and the second flushing pipeline 12, and the second steam-water separation regenerator 4 can be flushed through the third flushing pipeline 13 and the fourth flushing pipeline 14, so that the flushing efficiency of the first steam-water separation regenerator 3 and the second steam-water separation regenerator 4 is further improved.
In an embodiment, as shown in fig. 1, the condensed water flushing circuit 2 further includes a water supply line 25 provided with a water pump 251 and a water supply valve 252; one end of the water supply pipeline 25 is communicated with the condensate water circulation loop 6 of the nuclear power plant, and the other end of the water supply pipeline 25 is communicated with the fifth flushing pipeline, the sixth flushing pipeline 22, the seventh flushing pipeline 23 and the eighth flushing pipeline 24. It is understood that the water pump 251 can convey the condensed water in the condensed water circulation circuit 6 of the nuclear power plant to the fifth flushing pipe 21, the sixth flushing pipe 22, the seventh flushing pipe 23 and the eighth flushing pipe 24, so as to flush the first and second water-vapor separation regenerators 3 and 4 with the condensed water; and the water supply valve 252 may function to close or open the water supply line 25. In this embodiment, the condensed water in the condensed water circulation circuit 6 of the nuclear power plant can be respectively conveyed to the fifth flushing pipe 21, the sixth flushing pipe 22, the seventh flushing pipe 23 and the eighth flushing pipe 24 by using the one-way water supply pipe 25, so that the manufacturing cost of the drain tank flushing system of the nuclear power plant is reduced.
In one embodiment, as shown in fig. 1, the condensate flushing circuit 2 further includes a condenser 26, and the nuclear power plant condensate circulating circuit 6 is connected to an end of the water supply line 25, which is far from the fifth flushing pipe, through the condenser 26. As can be understood, the condenser 26 can perform a cooling treatment on the condensate in the condensate circulation loop of the nuclear power plant, so that the low-temperature condensate from the condensate circulation loop of the nuclear power plant is input into the turbine of the nuclear power plant, thereby improving the power generation efficiency of the turbine of the nuclear power plant.
In an embodiment, as shown in fig. 1, the demineralized water supply circuit 1 further includes a head tank 15, and the demineralized water supply system 5 is communicated with the first flushing pipe 11, the second flushing pipe 12, the third flushing pipe 13 and the fourth flushing pipe 14 through the head tank 15. It can be understood that the demineralized water in the demineralized water supply system 5 of the nuclear power plant can be stored in the head tank 15, and the demineralized water stored in the head tank 15 has a large potential energy, so that the demineralized water in the head tank 15 can be respectively conveyed to the first flushing pipeline 11, the second flushing pipeline 12, the third flushing pipeline 13 and the fourth flushing pipeline 14 without a conveying pump, thereby further reducing the manufacturing cost of the nuclear power plant steam trap flushing system.
In an embodiment, as shown in fig. 1, the condensate flushing circuit 2 further comprises a first return line 27 provided with a first shut-off valve 271, a second return line 28 provided with a second shut-off valve 281, a third return line 29 provided with a third shut-off valve 291, and a fourth return line 201 provided with a fourth shut-off valve 2011; one end of the first return pipeline 27 is communicated with the first separation drain tank 31, and the other end of the first return pipeline 27 is communicated with the nuclear power station condensed water circulation loop 6; one end of the second return pipeline 28 is communicated with the first regeneration water drainage tank 32, and the other end of the second return pipeline 28 is communicated with the nuclear power station condensed water circulation loop 6; one end of the third return pipeline 29 is communicated with the second separation drain tank 41, and the other end of the second return pipeline 28 is communicated with the nuclear power station condensed water circulation loop 6; one end of the fourth return pipeline 201 is communicated with the second regeneration drain tank 42, and the other end of the fourth return pipeline 201 is communicated with the nuclear power station condensed water circulation loop 6. It is understood that the first shut-off valve 271 may control the opening and closing of the first return line 27, the second shut-off valve 281 may control the opening and closing of the second return line 28, the third shut-off valve 291 may control the opening and closing of the third return line 29, and the fourth shut-off valve 2011 may control the opening and closing of the fourth return line 201.
Specifically, when the first washing pipe 11 and/or the fifth washing pipe 21 is used to wash the first separation steam trap 31, the first shut-off valve 271 is first closed, and when the first separation steam trap 31 is filled with water, the first shut-off valve 271 is opened, so that the water in the first separation steam trap 31 is drained to the condensate water circulation loop 6 of the nuclear power plant, and thus the water used to wash the first separation steam trap 31 can be recycled, and waste of water resources is avoided. Further, the functions of the second return pipeline 28, the third return pipeline 29 and the fourth return pipeline 201 are the same as those of the first return pipeline 27, and thus, the description thereof is omitted.
In an embodiment, as shown in fig. 1, the condensed water flushing circuit 2 further comprises a first flow conduit 202 provided with a fifth shut-off valve 2021, a second flow conduit 203 provided with a sixth shut-off valve 2031, a third flow conduit 204 provided with a seventh shut-off valve 2041, and a fourth flow conduit 205 provided with an eighth shut-off valve 2051; one end of the first circulation pipeline 202 is communicated with the first separation drain tank 31, and the other end of the first circulation pipeline 202 is communicated with the nuclear power station high-pressure feedwater heating system 7; one end of the second circulation pipeline 203 is communicated with the first regeneration and water dredging tank 32, and the other end of the second circulation pipeline 203 is communicated with the nuclear power station high-pressure feedwater heating system 7; one end of the third circulation pipeline 204 is communicated with the second separation drain tank 41, and the other end of the second circulation pipeline 203 is communicated with the nuclear power station high-pressure feedwater heating system 7; one end of the fourth flow pipe 205 is communicated with the second regeneration drain tank 42, and the other end of the fourth flow pipe 205 is communicated with the nuclear power plant high-pressure feedwater heating system 7. It is understood that the fifth shut-off valve 2021 may control the opening and closing of the first flow channel 202, the sixth shut-off valve 2031 may control the opening and closing of the second flow channel 203, the seventh shut-off valve 2041 may control the opening and closing of the third flow channel 204, and the eighth shut-off valve 2051 may control the opening and closing of the fourth flow channel 205.
Further, the high-pressure feedwater heating system 7 of the nuclear power plant may heat and heat the water therein, and then deliver the water to the turbine of the nuclear power plant.
Specifically, when the first steam-water separation regenerator 3 works normally, the fifth shut-off valve 2021 and the sixth shut-off valve 2031 are both turned on, so that the water in the first separation drain tank 31 enters the nuclear power plant high-pressure feedwater heating system 7 through the first circulation pipeline 202, and the water in the first regeneration drain tank 32 enters the nuclear power plant high-pressure feedwater heating system 7 through the second circulation pipeline 203; further, when the liquid level in the first separation steam trap 31 exceeds the preset high liquid level, the first circulation pipeline 202 discharges the water in the first separation steam trap 31 with low efficiency, at this time, the first shut-off valve 271 needs to be opened, and part of the water in the first separation steam trap 31 can flow into the condensate water circulation loop 6 of the nuclear power plant through the first return pipeline 27, so that the problem that the work efficiency of the steam turbine of the nuclear power plant is reduced due to the excessive water stored in the first separation steam trap 31 is solved. The second communicating channel 204, the third communicating channel 205 and the fourth communicating channel 206 all have the same function as the first communicating channel 201, and thus are not described herein again.
In one embodiment, as shown in fig. 1, the first flushing pipe 11, the second flushing pipe 12, the third flushing pipe 13 and the fourth flushing pipe 14 are all flexible hoses. It can be understood that during the overhaul of the nuclear power plant, the flexible first flushing pipe 11 can be communicated between the demineralized water supply system 5 and the first separation drain tank 31 of the nuclear power plant through the quick connector on site, the flexible second flushing pipe 12 can be communicated between the demineralized water supply system 5 and the first regeneration drain tank 32 of the nuclear power plant through the quick connector on site, the flexible third flushing pipe 13 can be communicated between the demineralized water supply system 5 and the second separation drain tank 41 of the nuclear power plant through the quick connector on site, and the flexible fourth flushing pipe 14 can be communicated between the demineralized water supply system 5 and the second regeneration drain tank 42 of the nuclear power plant through the quick connector on site, so that the flushing work of the first steam-water separator regenerator 3 and the second steam-water separator regenerator 4 can be completed without additionally laying pipes, and the operation cost of the nuclear power plant is reduced.
The invention also provides a nuclear power station drain tank flushing method applied to the nuclear power station drain tank flushing system, which comprises the following steps
Receiving a flushing command, and simultaneously performing the following flushing steps (step A1, step A2, step A3 and step A4) after detecting that the condensed water in the condensed water circulation circuit 6 of the nuclear power plant is qualified; preferably, the condensate in the condensate circulation circuit 6 of the nuclear power plant is qualified when the condensate in the condensate circulation circuit 6 of the nuclear power plant satisfies a fifth water quality condition, the fifth water quality condition including: the suspended matters in the condensed water circulation loop 6 of the nuclear power station are less than 1000ug/kg, and the Na content is less than 20 ug/kg. That is, the condensate water circulation circuit 6 of the nuclear power plant satisfies the flushing requirement, and the following steps are performed at the same time.
Step a1, controlling the first valve 111 and the fifth valve 211 to be open, so that the demineralized water in the first flushing pipe 11 and the condensed water in the fifth flushing pipe 21 flush the first separation drain tank 31 at the same time; it will be appreciated that the first flush line 11 may flush the first separation trap 31 with demineralized water from the plant demineralized water supply system 5, and that the fifth flush line 21 may flush the first separation trap 31 with condensate from the plant condensate loop 6.
Step A2, controlling the second valve 121 and the sixth valve 221 to be conducted, so that the demineralized water in the second flushing pipeline 12 and the condensed water in the sixth flushing pipeline 22 flush the first regenerated hydrophobic tank 32 simultaneously; it will be appreciated that the second flush line 12 may flush the first regenerable hydrophobic tank 32 with demineralized water from the nuclear power plant demineralized water supply system 5, and that the sixth flush line 22 may flush the first regenerable hydrophobic tank 32 with condensate from the nuclear power plant condensate loop 6.
Step a2, controlling the third valve 131 and the seventh valve 231 to be open, so that the demineralized water in the third flushing pipe 13 and the condensed water in the seventh flushing pipe 23 flush the second separation trap tank 41 at the same time; it will be appreciated that the third flush line 13 may flush the second separation trap 41 with demineralized water from the plant demineralized water supply system 5, and that the seventh flush line 23 may flush the second separation trap 41 with condensate from the plant condensate loop 6.
Step a4, controlling the fourth valve 141 and the eighth valve 241 to be open, so that the demineralized water in the fourth flushing pipe 14 and the condensed water in the eighth flushing pipe 24 flush the second regeneration drain tank 42 at the same time; it will be appreciated that the third flush line 14 may flush the second regeneration trap 42 with demineralized water from the nuclear power plant supply system 5, and that the seventh flush line 24 may flush the second regeneration trap 42 with condensate from the nuclear power plant condensate loop 6.
After the water quality in the first separation drain tank 31 is detected to reach the standard, the first valve 111 and the fifth valve 211 are closed; it can be understood that, in the process of flushing the first separation steam trap 31, it is detected whether the water quality in the first separation steam trap 31 reaches the standard in real time, and after it is detected that the water quality in the first separation steam trap 31 reaches the standard, the first valve 111 and the fifth valve 211 are closed, at this time, the first separation steam trap 31 is flushed completely.
Preferably, when the water quality in the first separation drain tank 31 satisfies a first water quality condition, the water quality in the first separation drain tank 31 is confirmed to be up to standard, and the first water quality condition includes: the suspended substance in the water in the first separation hydrophobic box 31 is less than 1000ug/kg, and the Na content is less than 20 ug/kg. Whether the first separation drain tank 31 is cleaned or not is reflected by the content of suspended matters and Na in the first separation drain tank, and the judgment standard is high in precision and convenient to detect.
After the water quality in the first regeneration hydrophobic tank 32 is detected to reach the standard, the second valve 121 and the sixth valve 221 are closed; it is understood that during the flushing process of the first regenerated hydrophobic tank 32, whether the water quality in the first regenerated hydrophobic tank 32 is up to standard is detected in real time, and after the water quality in the first regenerated hydrophobic tank 32 is up to standard, the second valve 121 and the sixth valve 221 are closed, and at this time, the first regenerated hydrophobic tank 32 is flushed clean.
Preferably, when the water quality in the first regeneration hydrophobic tank 32 satisfies a second water quality condition, the water quality in the first regeneration hydrophobic tank 32 is determined to reach the standard, and the second water quality condition includes: the suspended matters in the water in the first regeneration hydrophobic box 32 are less than 1000ug/kg, and the Na content is less than 20 ug/kg. Whether the first regeneration hydrophobic tank 32 is cleaned or not is reflected by the content of suspended matters and Na in the first regeneration hydrophobic tank, and the judgment standard is high in precision and convenient to detect.
After the water quality in the second separation drain tank 41 is detected to reach the standard, the third valve 131 and the seventh valve 231 are closed; it is understood that, during the flushing process of the second separation steam trap 41, whether the water quality in the second separation steam trap 41 reaches the standard is detected in real time, and after the water quality in the second separation steam trap 41 reaches the standard, the third valve 131 and the seventh valve 231 are closed, and at this time, the second separation steam trap 41 is flushed clean.
Preferably, the water quality in the second separation drain tank 41 is confirmed to be up to standard when the water quality in the second separation drain tank 41 satisfies a third water quality condition, and the third water quality condition includes: the suspended substance in the water in the second separation drain tank 41 is less than 1000ug/kg, and the Na content is less than 20 ug/kg. Whether the water is cleaned or not is reflected by the content of suspended matters and Na in the second separation drain tank 41, and the judgment standard is high in precision and convenient to detect.
After the water quality in the second regeneration drain tank 42 is detected to be up to standard, the fourth valve 141 and the eighth valve 241 are closed. It can be understood that, during the process of flushing the second regenerated steam trap 42, it is detected in real time whether the water quality in the second regenerated steam trap 42 reaches the standard, and after it is detected that the water quality in the second regenerated steam trap 42 reaches the standard, the fourth valve 141 and the eighth valve 241 are closed, at this time, the second regenerated steam trap 42 is flushed completely.
Preferably, when the water quality in the second regeneration steam trap 42 satisfies a fourth water quality condition, the water quality in the second regeneration steam trap 42 is determined to be up to standard, and the fourth water quality condition includes: the suspended substance in the water in the second regeneration drain tank 42 is less than 1000ug/kg, and the Na content is less than 20 ug/kg. Whether the second regeneration drain tank 42 is cleaned or not is reflected by suspended matters and Na content in the second regeneration drain tank, and the judgment standard is high in precision and convenient to detect.
According to the invention, the washing efficiency and the washing quality of the first steam-water separation regenerator 3 and the second steam-water separation regenerator 4 are improved by the method for washing the drain tank of the nuclear power station.
In an embodiment, as shown in fig. 1, after receiving the flushing instruction, the method further includes:
after detecting the failure of the condensate in the condensate loop 6 of the nuclear power plant, the following flushing steps (step B1, step B2, step B3 and step B4) are carried out simultaneously, it being understood that when it is detected that the suspension in the condensate loop 6 of the nuclear power plant is greater than or equal to 1000ug/kg and/or the Na content is greater than or equal to 20ug/kg, the following flushing steps are carried out simultaneously:
step B1, controlling the first valve 111 to be opened, and the fifth valve 211 to be closed, so that the desalted water in the first flushing pipe 11 flushes the first separation drain tank 31; at this time, the first flushing pipe 11 may flush the first separation drain tank 31 with the demineralized water in the demineralized water supply system 5 of the nuclear power plant, and detect whether the condensate in the condensate circulation circuit 6 of the nuclear power plant is qualified in real time; when it is detected that the condensation in the condensate water circuit 6 of the nuclear power plant is acceptable, step a1 is performed.
Step B2, controlling the second valve 121 to be opened, and the sixth valve 221 to be closed, so that the desalted water in the second flushing pipe 12 flushes the first regenerated hydrophobic tank 32; at this time, the second flushing pipe 12 may flush the first regeneration hydrophobic tank 32 with the demineralized water in the demineralized water supply system 5 of the nuclear power plant, and detect whether the condensate in the condensate circulation loop 6 of the nuclear power plant is qualified in real time; when it is detected that the condensation in the condensate water circuit 6 of the nuclear power plant is acceptable, step a2 is performed.
Step B3, controlling the third valve 131 to open, and the sixth valve 221 to close, so that the demineralized water in the third flushing pipe 13 flushes the second separation drain tank 41; at this time, the third flushing pipe 13 may flush the second separation drain tank 41 with the demineralized water in the demineralized water supply system 5 of the nuclear power plant, and detect whether the condensate in the condensate circulation circuit 6 of the nuclear power plant is qualified in real time; when the detection result shows that the condensation in the condensate water circulation circuit 6 of the nuclear power plant is qualified, the step A3 is performed.
Step B4, the fourth valve 141 is controlled to be opened, and the fifth valve 211 is closed, so that the desalted water in the fourth flushing pipe 14 flushes the second regeneration drain tank 42. At this time, the fourth flushing pipe 14 may flush the second regeneration drain tank 42 with the demineralized water in the demineralized water supply system 5 of the nuclear power plant, and detect whether the condensate in the condensate circulation loop 6 of the nuclear power plant is qualified in real time; when the detection result shows that the condensation in the condensate water circulation circuit 6 of the nuclear power plant is qualified, the step B4 is performed.
In this embodiment, when the condensate in the condensate circulation circuit 6 of the nuclear power plant does not reach the time of cleaning the first steam-water separation regenerator 3 and the second steam-water separation regenerator 4, the first steam-water separation regenerator 3 may be washed by the first washing pipeline 11 and the second washing pipeline 12, and the second steam-water separation regenerator 4 may be washed by the third washing pipeline 13 and the fourth washing pipeline 14, so as to further improve the washing efficiency of the first steam-water separation regenerator 3 and the second steam-water separation regenerator 4.
Yet another embodiment of the present invention further provides a computer apparatus comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor, when executing the computer program, implements the nuclear power plant steam trap flushing method described above.
The present invention is not limited to the above preferred embodiments, and any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (12)
1. A nuclear power station drain tank flushing system is characterized by comprising a demineralized water flushing loop and a condensed water flushing loop;
the desalted water flushing loop comprises a first flushing pipeline provided with a first valve, a second flushing pipeline provided with a second valve, a third flushing pipeline provided with a third valve and a fourth flushing pipeline provided with a fourth valve; the first flushing pipeline, the second flushing pipeline, the third flushing pipeline and the fourth flushing pipeline are all communicated with the demineralized water supply system of the nuclear power station, one end, away from the demineralized water supply system of the nuclear power station, of the first flushing pipeline is communicated with a first separation drain tank of a first steam-water separation regenerator, one end, away from the demineralized water supply system of the nuclear power station, of the second flushing pipeline is communicated with a first regeneration drain tank of the first steam-water separation regenerator, one end, away from the demineralized water supply system of the nuclear power station, of the third flushing pipeline is communicated with a second separation drain tank of a second steam-water separation regenerator, and one end, away from the demineralized water supply system of the nuclear power station, of the fourth flushing pipeline is communicated with a second regeneration drain tank of the second steam-water separation regenerator;
the condensed water flushing loop comprises a fifth flushing pipeline provided with a fifth valve, a sixth flushing pipeline provided with a sixth valve, a seventh flushing pipeline provided with a seventh valve and an eighth flushing pipeline provided with an eighth valve; one end of the fifth flushing pipeline is communicated with a condensate water circulation loop of the nuclear power station, and the other end of the fifth flushing pipeline is communicated with the first separation drain tank; one end of the sixth flushing pipeline is communicated with a condensate water circulation loop of the nuclear power plant, and the other end of the sixth flushing pipeline is communicated with the first regeneration water drainage tank; one end of the seventh flushing pipeline is communicated with a condensate water circulation loop of the nuclear power plant, and the other end of the seventh flushing pipeline is communicated with the second separation drain tank; one end of the eighth flushing pipeline is communicated with the condensate water circulation loop of the nuclear power plant, and the other end of the eighth flushing pipeline is communicated with the second regeneration drain tank.
2. The nuclear power plant trap tank flushing system of claim 1, wherein the condensate flushing circuit further includes a water supply line provided with a water pump and a water supply valve; one end of the water supply pipeline is communicated with a condensate water circulation loop of the nuclear power station, and the other end of the water supply pipeline is communicated with the fifth flushing pipeline, the sixth flushing pipeline, the seventh flushing pipeline and the eighth flushing pipeline.
3. The nuclear power plant drain tank flushing system of claim 2, wherein the condensate flushing circuit further includes a condenser through which the nuclear power plant condensate circulating circuit communicates with an end of the water supply line remote from the fifth flushing line.
4. The nuclear power plant trap flushing system of claim 1, wherein the demineralized water flush circuit further includes a head tank through which the nuclear power plant demineralized water supply system communicates with the first flush line, the second flush line, the third flush line, and the fourth flush line.
5. The nuclear power plant trap tank flush system of claim 1, wherein the condensate flush circuit further comprises a first return line having a first shutoff valve, a second return line having a second shutoff valve, a third return line having a third shutoff valve, and a fourth return line having a fourth shutoff valve; one end of the first return pipeline is communicated with the first separation drain tank, and the other end of the first return pipeline is communicated with a condensate water circulation loop of the nuclear power station; one end of the second return pipeline is communicated with the first regeneration water drainage tank, and the other end of the second return pipeline is communicated with a condensate water circulation loop of the nuclear power station; one end of the third return pipeline is communicated with the second separation drain tank, and the other end of the second return pipeline is communicated with a condensate water circulation loop of the nuclear power station; one end of the fourth return pipeline is communicated with the second regeneration drain tank, and the other end of the fourth return pipeline is communicated with a condensate water circulation loop of the nuclear power station.
6. The nuclear power plant trap tank flushing system of claim 1, wherein the condensate flushing loop further comprises a first flow line with a fifth shutoff valve, a second flow line with a sixth shutoff valve, a third flow line with a seventh shutoff valve, and a fourth flow line with an eighth shutoff valve; one end of the first circulation pipeline is communicated with the first separation drain tank, and the other end of the first circulation pipeline is communicated with a high-pressure feedwater heating system of the nuclear power station; one end of the second circulation pipeline is communicated with the first regeneration water dredging tank, and the other end of the second circulation pipeline is communicated with a high-pressure feed water heating system of the nuclear power station; one end of the third circulation pipeline is communicated with the second separation drain tank, and the other end of the second circulation pipeline is communicated with a high-pressure feedwater heating system of the nuclear power plant; one end of the fourth circulation pipeline is communicated with the second regeneration drain tank, and the other end of the fourth circulation pipeline is communicated with the nuclear power station high-pressure feed water heating system.
7. The nuclear power plant trap flushing system of claim 1, wherein the first flushing conduit, the second flushing conduit, the third flushing conduit, and the fourth flushing conduit are flexible hoses.
8. A nuclear power plant steam trap flushing method applied to the nuclear power plant steam trap flushing system of any one of claims 1 to 7, comprising:
receiving a flushing instruction, and after detecting that the condensed water in the condensed water circulation loop of the nuclear power station is qualified, simultaneously carrying out the following flushing steps:
controlling the first valve and the fifth valve to be conducted, so that the desalted water in the first flushing pipeline and the condensed water in the fifth flushing pipeline flush the first separation drain tank simultaneously;
controlling the second valve and the sixth valve to be conducted, so that the desalted water in the second flushing pipeline and the condensed water in the sixth flushing pipeline flush the first regeneration water drainage tank simultaneously;
controlling the third valve and the seventh valve to be conducted, so that the desalted water in the third flushing pipeline and the condensed water in the seventh flushing pipeline flush the second separation drain tank simultaneously;
controlling the fourth valve and the eighth valve to be conducted, so that the desalted water in the fourth flushing pipeline and the condensed water in the eighth flushing pipeline flush the second regeneration drain tank simultaneously;
after the water quality in the first separation drain tank is detected to reach the standard, closing the first valve and the fifth valve;
after the water quality in the first regeneration water-repellent tank is detected to reach the standard, closing the second valve and the sixth valve;
after the water quality in the second separation drain tank is detected to reach the standard, closing the third valve and the seventh valve;
and after the water quality in the second regeneration drain tank is detected to reach the standard, closing the fourth valve and the eighth valve.
9. The nuclear power plant trap flushing method of claim 8, after receiving the flush command, further comprising:
after detecting that the condensed water in the condensed water circulation loop of the nuclear power station is unqualified, simultaneously carrying out the following flushing steps:
controlling the first valve to be conducted, and closing the fifth valve to enable the desalted water in the first flushing pipeline to flush the first separation drain tank;
controlling the second valve to be communicated, and closing the sixth valve to enable the desalted water in the second flushing pipeline to flush the first regeneration hydrophobic tank;
controlling the third valve to be conducted, and closing the sixth valve to enable the desalted water in the third flushing pipeline to flush the second separation drain tank;
and controlling the fourth valve to be conducted, and closing the fifth valve to enable the desalted water in the fourth flushing pipeline to flush the second regeneration drain tank.
10. The nuclear power plant steam trap flushing method of claim 8, wherein when the water quality in the first separation steam trap satisfies a first water quality condition, it is determined that the water quality in the first separation steam trap is up to standard, and the first water quality condition includes: the suspended matters in the water in the first separation drain tank are less than 1000ug/kg, and the Na content is less than 20 ug/kg;
when the water quality in the first regeneration hydrophobic tank meets a second water quality condition, the water quality in the first regeneration hydrophobic tank is confirmed to reach the standard, and the second water quality condition comprises: the suspended matters in the water in the first regeneration hydrophobic tank are less than 1000ug/kg, and the Na content is less than 20 ug/kg;
when the water quality in the second separation drain tank meets a third water quality condition, the water quality in the second separation drain tank is confirmed to reach the standard, and the third water quality condition comprises: the suspended matters in the water in the second separation drain tank are less than 1000ug/kg, and the Na content is less than 20 ug/kg;
when the water quality in the second regeneration drain tank meets a fourth water quality condition, the water quality in the second regeneration drain tank is confirmed to reach the standard, and the fourth water quality condition comprises: the suspended substance in the water in the second regeneration drain tank is less than 1000ug/kg, and the Na content is less than 20 ug/kg.
11. The nuclear power plant drain tank flushing method as recited in claim 8, wherein the condensate in the nuclear power plant condensate loop is confirmed to be qualified when the condensate satisfies a fifth water condition, the fifth water condition comprising: suspended matters in the condensed water in the circulating loop of the condensed water of the nuclear power station are less than 1000ug/kg, and the Na content is less than 20 ug/kg.
12. Computer arrangement comprising a memory, a processor and a computer program stored in said memory and executable on said processor, said processor when executing said computer program implementing a nuclear power plant steam trap flushing method according to any one of claims 8 to 10.
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