CN213577448U - Sodium-cooled fast reactor steam generator and chemical cleaning device for steam-water side of heat transfer pipe of superheater - Google Patents
Sodium-cooled fast reactor steam generator and chemical cleaning device for steam-water side of heat transfer pipe of superheater Download PDFInfo
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- CN213577448U CN213577448U CN202022557967.3U CN202022557967U CN213577448U CN 213577448 U CN213577448 U CN 213577448U CN 202022557967 U CN202022557967 U CN 202022557967U CN 213577448 U CN213577448 U CN 213577448U
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Abstract
The utility model discloses a sodium-cooled fast reactor steam generator and superheater heat transfer pipe steam-water side chemical cleaning device, the export of a dosing tank is communicated with the inlet of a dosing pump, the export of the dosing pump is divided into two paths, wherein one path is communicated with the inlet of the dosing tank through a reflux valve, the other path is communicated with the water inlet of a cleaning tank, a desalination water source is communicated with the inlet of the cleaning tank and the inlet of the dosing tank, a nozzle is arranged in the cleaning tank, a steam source is communicated with the nozzle, the export of the cleaning tank is divided into two paths, one path is communicated with the inlet of a cleaning flowmeter through the cleaning pump, the other path is communicated with the inlet of the cleaning flowmeter through a monitoring pipe and a monitoring pipe flowmeter, the export of the cleaning flowmeter is divided into two paths, one path is communicated with a wastewater collection tank through a drain valve, and the other path is communicated with the inlet, the system can realize chemical cleaning of the evaporator and the superheater in the sodium-cooled fast reactor unit.
Description
Technical Field
The utility model belongs to the chemical cleaning field of nuclear power plant relates to a soda-cooled fast reactor steam generator and superheater heat-transfer pipe soda side chemical cleaning device.
Background
The chemical cleaning technology is widely applied to important equipment of a water supply pipeline, a main steam pipeline and a water wall of a thermal power plant, and achieves very good economic benefit and safety benefit. The chemical cleaning is an important means for removing various impurities remained in the processes of manufacturing, transporting, installing and the like of the power plant system pipeline, improving the cleanliness of equipment and preventing the equipment from being corroded and damaged in the operation process, and is an important step before the unit is put into production. The sodium-cooled fast reactor steam generator/superheater is one of most core devices of a sodium-cooled fast reactor nuclear power plant, a heat exchange tube is made of chromium-molybdenum steel 2.25Cr1Mo, the working condition is similar to that of a part of thermal power water-cooled walls, a medium is high-temperature high-pressure superheated steam, steam parameters are high, the risk of corrosion product deposition and scaling of the evaporator and the superheater is higher, and the precedent of chemical cleaning of the evaporator/superheater of the sodium-cooled fast reactor unit is avoided temporarily.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome above-mentioned prior art's shortcoming, provide a sodium-cooled fast reactor steam generator and superheater heat-transfer pipe soda side chemical cleaning device, this system can realize the chemical cleaning to evaporimeter and superheater in the sodium-cooled fast reactor unit.
In order to achieve the purpose, the sodium-cooled fast reactor steam generator and superheater heat transfer pipe steam-water side chemical cleaning device comprises a dosing tank, a dosing pump, a cleaning tank, a steam source, a cleaning pump, a cleaning flowmeter, a monitoring pipe flowmeter, a wastewater collection box, a drain valve and a chemical sampling device;
the export of joining in marriage the medical kit is linked together with the entry of pump of dispensing, and the export of pump of dispensing is divided into two the tunnel, and wherein is linked together through the entry of backwash valve with the medicine dispensing box all the way, and another way is linked together with the water inlet of wasing the case, and the demineralized water source is linked together with the entry of wasing the case and the entry of dispensing the medical kit, washs the incasement and is provided with the nozzle, the steam source with the nozzle is linked together, and the export of wasing the case is divided into two the tunnel, and wherein is linked together through the entry of scavenging pump with wasing the flowmeter all the way, and another way is linked together through monitoring pipe and monitoring pipe flowmeter and wasing the entry of flowmeter, washs the export of flowmeter and is divided into two the tunnel.
The number of the cleaning pumps is two, and the two cleaning pumps are communicated in parallel.
The washing device also comprises a circulating pipeline, wherein one end of the circulating pipeline is communicated with an inlet of the washing flowmeter, the other end of the circulating pipeline is communicated with an inlet of the washing tank, and a circulating water valve is arranged on the circulating pipeline.
An outlet valve is arranged at the outlet of the cleaning pump.
And a flow control valve is arranged at the outlet of the steam source.
The outlet of the demineralized water source is communicated with the inlet of the cleaning box through a first valve, and the outlet of the demineralized water source is communicated with the inlet of the dosing box through a second valve.
The outlet of the dosing box is communicated with the inlet of the dosing pump through a third valve.
The outlet of the dosage pump is communicated with the inlet of the cleaning box through a fourth valve.
A fifth valve is arranged at the outlet of the cleaning box;
a sixth valve is arranged at the inlet of the monitoring pipe; a seventh valve is arranged at the outlet of the monitoring pipe flowmeter;
an eighth valve is arranged at the inlet of the steam generator; and a ninth valve is arranged at an outlet of the superheater.
The utility model discloses following beneficial effect has:
sodium-cooled fast reactor steam generator and superheater heat-transfer pipe vapour and water side chemical cleaning device when concrete operation, through establishing the washing return circuit of sodium-cooled fast reactor steam generator/superheater, simultaneously through dispensing kit and the different washing liquid of desalination water source configuration, and heat the washing liquid through the steam source, thereby realize washing the large-traffic of sodium-cooled fast reactor steam generator/superheater, the deoiling is washd, the pickling, rinsing and passivation, get rid of the antirust oil of sodium-cooled fast reactor steam generator/superheater heat-transfer pipe vapour and water side inner wall, impurity such as cinder, and form complete passive film, ensure simultaneously that the thermal performance and the material property of sodium-cooled fast reactor steam generator/superheater heat-transfer pipe are not influenced almost, improve sodium-cooled fast reactor steam generator/superheater's anticorrosive ability.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Wherein, 1 is a dosing tank, 2 is a dosing pump, 3 is a demineralized water source, 4 is a steam source, 5 is a cleaning tank, 6 is a cleaning pump, 7 is a monitoring pipe, 8 is a monitoring pipe flowmeter, 9 is a cleaning flowmeter, 10 is a wastewater collecting tank, 11-1 is a steam generator, 11-2 is a superheater, and 12 is a chemical sampling device.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings:
referring to fig. 1, the sodium-cooled fast reactor steam generator and superheater heat transfer tube steam-water side chemical cleaning device of the present invention comprises a dosing tank 1, a dosing pump 2, a cleaning tank 5, a steam source 4, a cleaning pump 6, a cleaning flow meter 9, a monitoring pipe 7, a monitoring pipe flow meter 8, a wastewater collection tank 10, a drain valve and a chemical sampling device 12; the outlet of the dispensing box 1 is communicated with the inlet of the dispensing pump 2, the outlet of the dispensing pump 2 is divided into two paths, wherein one path is communicated with the inlet of the dispensing box 1 through a reflux valve, the other path is communicated with the water inlet of a cleaning box 5, a desalination water source 3 is communicated with the inlet of the cleaning box 5 and the inlet of the dispensing box 1, a nozzle is arranged in the cleaning box 5, a steam source 4 is communicated with the nozzle, the outlet of the cleaning box 5 is divided into two paths, one path is communicated with the inlet of a cleaning flow meter 9 through a cleaning pump 6, the other path is communicated with the inlet of the cleaning flow meter 9 through a monitoring pipe 7 and a monitoring pipe flow meter 8, the outlet of the cleaning flow meter 9 is divided into two paths, one path is communicated with a wastewater collection box 10 through a drain valve, and the other path is communicated with the inlet of the cleaning box 5 through a steam generator 11-, wherein, the number of scavenging pump 6 is two, and two scavenging pumps 6 are parallelly connected the intercommunication.
The utility model discloses still include circulation pipeline, wherein, circulation pipeline's one end is linked together with the entry of wasing flowmeter 9, and circulation pipeline's the other end is linked together with the entry of wasing case 5, is provided with the circulating water valve door on the circulation pipeline.
An outlet valve is arranged at the outlet of the cleaning pump 6; the outlet of the steam source 4 is provided with a flow control valve.
The outlet of the desalted water source 3 is communicated with the inlet of the cleaning box 5 through a first valve, and the outlet of the desalted water source 3 is communicated with the inlet of the dosing box 1 through a second valve; the outlet of the dispensing box 1 is communicated with the inlet of the dispensing pump 2 through a third valve; the outlet of the dispensing pump 2 is communicated with the inlet of the cleaning box 5 through a fourth valve.
A fifth valve is arranged at the outlet of the cleaning box 5; a sixth valve is arranged at the inlet of the monitoring pipe 7; a seventh valve is arranged at the outlet of the monitoring pipe flowmeter 8; an eighth valve is arranged at the inlet of the steam generator 11-1; and a ninth valve is arranged at the outlet of the superheater 11-2.
1. The large-flow water washing comprises the following specific processes:
1.1, using a desalination water source 3 to supply water to a cleaning tank 5, filling water to the system, exhausting air and checking whether the system leaks or not;
1.2, starting the cleaning pump 6, pumping water in the cleaning tank 5 by the cleaning pump 6 to flush the steam generator 11-1 and the superheater 11-2, returning the flushed water to the cleaning tank 5, and discharging the water in the cleaning tank 5 into the wastewater collection tank 10 after the cleaning is finished.
2. Oil removal cleaning
2.1, a desalting water source 3 is used for supplying water to a cleaning tank 5, and water filling and air exhausting are carried out on the system;
2.2 heating water in the cleaning box 5 by using steam discharged by the steam source 4 to raise the temperature of the water in the system to a low-temperature oil removal cleaning temperature of 45-55 ℃;
2.3 the trisodium phosphate degreaser with the concentration of 0.3 to 1.0 percent output from the dispensing box 1 is sent into a cleaning box 5 through a dispensing pump 2;
2.4 starting one of the cleaning pumps 6, adjusting an outlet valve of the cleaning pump 6 to ensure that the cleaning flow rate flowing through the steam generator 11-1 and the superheater 11-2 is the same as the flow rate measured by the monitoring pipe flowmeter 8, controlling the flow rate to be 0.5m/s, and performing low-temperature oil removal cleaning on the steam generator 11-1 and the superheater 11-2, wherein the cleaning time lasts for 8-12 hours;
2.5 heating the water in the cleaning box 5 by the steam output by the steam source 4 to raise the temperature of the water in the cleaning box 5 to a high-temperature oil removing and cleaning temperature of 80-90 ℃;
2.6 starting one of the cleaning pumps 6 to perform high-temperature degreasing cleaning on the steam generator 11-1 and the superheater 11-2, wherein the cleaning time is 8-12 hours;
2.7 discharging the water in the system to a waste water collecting tank 10 until the pH value of the discharged water in the system is less than 9.5.
3. Catalytic citric acid chemical cleaning
3.1 heating the water in the cleaning box 5 to 85-95 ℃ by using the steam output by the steam source 4, wherein the heating rate is controlled to be 10-15 ℃/h;
3.2 adding a corrosion inhibitor with the concentration of 0.3-0.4% into the cleaning box 5 by using the dispensing box 1 and the dispensing pump 2, and performing pre-corrosion inhibition for 0.5-1 h after circulating uniformly by using the cleaning pump 6;
3.3 catalytic citric acid was added to the wash tank 5 using the dosing tank 1 and dosing pump 2 and ammonia (NH) was used3·H2O) adjusting the pH value of the cleaning solution, adding a corrosion inhibitor and a reducing agent in a recycling manner, and uniformly circulating by using a cleaning pump 6, wherein the concentration of citric acid in water in the system is 3% -6%, the pH value is 3.5-4.5, the concentration of a catalyst is 0.1% -0.5%, and the concentration of a corrosion inhibitor is 0.3% -1.0%;
3.4 controlling the cleaning flow rate to be 0.5m/s-1m/s by adjusting an outlet valve of the cleaning pump 6;
3.5 during the chemical cleaning, samples were taken every 1h for analysis to determine pH, acid concentration, Fe3+、Fe2+And recording the concentration ofAnd the inlet and outlet temperatures of the system are controlled within the range of 85-95 ℃. When the concentration of total iron at the inlet and the outlet of the system reaches balance, cleaning can be stopped after cleaning for 1-2 h, and water washing is carried out after acid cleaning.
4. Washing with water after pickling
And (3) feeding the cleaning tank 5 with the demineralized water output by the demineralized water source 3, flushing the system at a large flow rate until the pH value of the drained water is more than 4.0 and the total iron content is less than 50 mg/L.
5. Rinsing
Use and join in marriage medicine chest 1 and join in marriage medicine pump 2 and add the medicine to wasing case 5, utilize scavenging pump 6 to carry out systemic circulation, the interior citric acid concentration of governing system: 0.2% -0.4%; concentration of corrosion inhibitor: 0.05 percent to 0.1 percent; rinsing temperature: rinsing the system for 2-4 h at 50-70 ℃.
6. Passivation of
After rinsing, use and join in marriage medical kit 1 and medicine pump 2 and add the medicine to wasing case 5, utilize scavenging pump 6 to carry out systemic circulation, the governing system internal parameter is as follows: hydrogen peroxide (H)2O2) Concentration: 0.3 to 0.5 percent; the pH value is more than or equal to 9.5; passivation temperature: passivating for 5-6 h at 45-55 ℃.
7. Chemical sampling
The system chemical parameters are sampled and analyzed by the chemical sampling device 12.
8. System drainage
The wastewater in the large-flow water washing stage can be directly discharged to a water treatment system in a factory, and the wastewater is discharged to the wastewater collection box 10 after the cleaning in other stages is finished, so that the professional waste liquid treatment is carried out.
Claims (9)
1. A sodium-cooled fast reactor steam generator and superheater heat transfer tube steam-water side chemical cleaning device is characterized by comprising a dosing tank (1), a dosing pump (2), a cleaning tank (5), a steam source (4), a cleaning pump (6), a cleaning flowmeter (9), a monitoring pipe (7), a monitoring pipe flowmeter (8), a wastewater collecting box (10), a drain valve and a chemical sampling device (12);
the outlet of the dispensing box (1) is communicated with the inlet of the dispensing pump (2), the outlet of the dispensing pump (2) is divided into two paths, wherein one path is communicated with the inlet of the dispensing box (1) through a reflux valve, the other path is communicated with the water inlet of the cleaning box (5), the desalination water source (3) is communicated with the inlet of the cleaning box (5) and the inlet of the dispensing box (1), a nozzle is arranged in the cleaning box (5), the steam source (4) is communicated with the nozzle, the outlet of the cleaning box (5) is divided into two paths, one path is communicated with the inlet of the cleaning flowmeter (9) through the cleaning pump (6), the other path is communicated with the inlet of the cleaning flowmeter (9) through the monitoring pipe (7) and the monitoring pipe flowmeter (8), the outlet of the cleaning flowmeter (9) is divided into two paths, one path is communicated with the wastewater collecting box (10) through a drain valve, and the other path is sequentially communicated with the steam generator (11-1), The superheater (11-2) and the chemical sampling device (12) are communicated with the inlet of the cleaning box (5).
2. The sodium-cooled fast reactor steam generator and superheater heat transfer tube steam-water side chemical cleaning device as claimed in claim 1, characterized in that the number of the cleaning pumps (6) is two, and the two cleaning pumps (6) are communicated in parallel.
3. The sodium-cooled fast reactor steam generator and superheater heat transfer tube steam-water side chemical cleaning device as claimed in claim 1, further comprising a circulation pipeline, wherein one end of the circulation pipeline is communicated with an inlet of the cleaning flow meter (9), the other end of the circulation pipeline is communicated with an inlet of the cleaning tank (5), and a circulation water valve is arranged on the circulation pipeline.
4. The sodium-cooled fast reactor steam generator and superheater heat transfer tube steam-water side chemical cleaning device as claimed in claim 1, characterized in that an outlet valve is provided at the outlet of the cleaning pump (6).
5. The sodium-cooled fast reactor steam generator and superheater heat transfer tube steam-water side chemical cleaning device as claimed in claim 1, characterized in that a flow control valve is arranged at the outlet of the steam source (4).
6. The sodium-cooled fast reactor steam generator and superheater heat transfer tube steam-water side chemical cleaning device as claimed in claim 1, characterized in that the outlet of the demineralized water source (3) is communicated with the inlet of the cleaning tank (5) through a first valve, and the outlet of the demineralized water source (3) is communicated with the inlet of the dosing tank (1) through a second valve.
7. The sodium-cooled fast reactor steam generator and superheater heat transfer tube steam-water side chemical cleaning device as claimed in claim 6, characterized in that the outlet of the dosing tank (1) is communicated with the inlet of the dosing pump (2) through a third valve.
8. The sodium-cooled fast reactor steam generator and superheater heat transfer tube steam-water side chemical cleaning device as claimed in claim 7, characterized in that the outlet of the dispensing pump (2) is communicated with the inlet of the cleaning tank (5) through a fourth valve.
9. The sodium-cooled fast reactor steam generator and superheater heat transfer tube steam-water side chemical cleaning device as claimed in claim 8, characterized in that a fifth valve is arranged at an outlet of the cleaning tank (5);
a sixth valve is arranged at the inlet of the monitoring pipe (7); a seventh valve is arranged at the outlet of the monitoring pipe flowmeter (8);
an eighth valve is arranged at the inlet of the steam generator (11-1); and a ninth valve is arranged at the outlet of the superheater (11-2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022557967.3U CN213577448U (en) | 2020-11-06 | 2020-11-06 | Sodium-cooled fast reactor steam generator and chemical cleaning device for steam-water side of heat transfer pipe of superheater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022557967.3U CN213577448U (en) | 2020-11-06 | 2020-11-06 | Sodium-cooled fast reactor steam generator and chemical cleaning device for steam-water side of heat transfer pipe of superheater |
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| CN213577448U true CN213577448U (en) | 2021-06-29 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202022557967.3U Active CN213577448U (en) | 2020-11-06 | 2020-11-06 | Sodium-cooled fast reactor steam generator and chemical cleaning device for steam-water side of heat transfer pipe of superheater |
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| CN (1) | CN213577448U (en) |
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