CN104832462A - Ejector system for vacuum-pumping of reactor coolant system - Google Patents
Ejector system for vacuum-pumping of reactor coolant system Download PDFInfo
- Publication number
- CN104832462A CN104832462A CN201510019450.XA CN201510019450A CN104832462A CN 104832462 A CN104832462 A CN 104832462A CN 201510019450 A CN201510019450 A CN 201510019450A CN 104832462 A CN104832462 A CN 104832462A
- Authority
- CN
- China
- Prior art keywords
- sparger
- ejector
- pipeline
- suction port
- reactor coolant
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04F—PUMPING OF FLUID BY DIRECT CONTACT OF ANOTHER FLUID OR BY USING INERTIA OF FLUID TO BE PUMPED; SIPHONS
- F04F5/00—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow
- F04F5/14—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow the inducing fluid being elastic fluid
- F04F5/16—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow the inducing fluid being elastic fluid displacing elastic fluids
- F04F5/20—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow the inducing fluid being elastic fluid displacing elastic fluids for evacuating
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04F—PUMPING OF FLUID BY DIRECT CONTACT OF ANOTHER FLUID OR BY USING INERTIA OF FLUID TO BE PUMPED; SIPHONS
- F04F5/00—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow
- F04F5/44—Component parts, details, or accessories not provided for in, or of interest apart from, groups F04F5/02 - F04F5/42
- F04F5/48—Control
- F04F5/52—Control of evacuating pumps
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04F—PUMPING OF FLUID BY DIRECT CONTACT OF ANOTHER FLUID OR BY USING INERTIA OF FLUID TO BE PUMPED; SIPHONS
- F04F5/00—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow
- F04F5/54—Installations characterised by use of jet pumps, e.g. combinations of two or more jet pumps of different type
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Jet Pumps And Other Pumps (AREA)
Abstract
The invention provides an ejector system for vacuum-pumping of a reactor coolant system. The ejector system includes an ejector 1 and an ejector 2 which are symmetrically arranged in parallel; a driving gas inlet pipeline is divided into two paths through a three-way joint, wherein the two paths are connected with the inlet of the ejector 1 and the inlet of the ejector 2 respectively; a suction inlet pipeline is divided into two paths through a three-way joint, wherein the two paths are connected with the suction chamber of the ejector 1 and the suction chamber of the ejector 2 respectively; an exhaust pipeline is divided into two paths through a three-way joint, wherein the two paths are connected with the outlet of the ejector 1 and the outlet of the ejector 2 respectively; the suction inlet pipeline is provided with a vacuum breakdown pipeline; and the vacuum breakdown pipeline is provided with a cut-off valve 2. With the ejector system of the invention adopted, the quantity of pumped air can be greatly improved, and air pumping time can be shortened, and 0.1MPa in 250-cubic meter volume can be vacuumized to 0.01MPa in 120 minutes, and requirements of the vacuum-pumping of a CAP1000 reactor coolant system can be satisfied.
Description
Technical field
The present invention relates to nuclear power plant reactor coolant system, be specifically related to a kind of ejector system vacuumized for large-scale million kilowatt generation Ⅲ nuclear power unit (CAP1000) reactor coolant loop.
Background technique
In conventional pressurized water heap nuclear power plant start-up course, main pump point flowing mode is adopted dynamically to catch up with gas to reactor coolant loop.Which requires higher to main pump, and catches up with gas effect undesirable.
Chinese large-sized million kilowatt generation Ⅲ nuclear power unit, be called for short CAP1000, reactor coolant loop starts employing vacuum water-filling mode, the air being gathered in steam generator heat-transfer pipe top utilizing which can discharge traditional approach not easily to drive out of, reduces the possibility of reactor coolant pump cavitation erosion.Clear and definite requirement is proposed to pumped vacuum systems, namely the pressure of reactor coolant loop can be evacuated to 0.01MPa (a) from 0.1MPa (a) in 2 hours.At present, pumped vacuum systems has a kind of scheme to be adopt displacement pump to vacuumize, and displacement pump is a canned pump, but needs to seal water.
Summary of the invention
The object of the present invention is to provide a kind of ejector system vacuumized for reactor coolant loop, it adopts sparger, and driving source is pressurized air, has non-energy dynamic response (unpowered parts) and simplification.
Realize the technological scheme of the object of the invention: a kind of ejector system vacuumized for reactor coolant loop, it comprises the sparger one and sparger two that symmetry is arranged in parallel;
Propellant suction port pipeline is divided into two-way through threeway, connects the entrance of sparger one and the entrance of sparger two respectively, makes propellant uniform distribution enter in sparger one and sparger two; Described propellant suction port pipeline arranges suction port stop valve;
Suction port pipeline is divided into symmetrical two-way through threeway, connects the suction chamber of sparger one and the suction chamber of sparger two respectively, air inlet uniformity is distributed; Described suction port pipeline is provided with safety check and stop valve one;
Exhaust line is divided into two-way through threeway, connects the outlet of sparger one and the outlet of sparger two respectively, ensures that the outlet of sparger one and the interruption-forming that goes out of sparger two stablize back pressure; Described exhaust line is provided with stop valve three;
Described suction port pipeline is arranged a vacuum breaking pipeline, vacuum breaking pipeline is provided with stop valve two.
As above for the ejector system that reactor coolant loop vacuumizes, the sparger one described in it and sparger two adopt air ejector, are to drive source of the gas with pressurized air.
As above for the ejector system that reactor coolant loop vacuumizes, the suction chamber of the sparger one described in it is provided with pressure instrument one, and the suction chamber of described sparger two is provided with pressure gauge two.
As above for the ejector system that reactor coolant loop vacuumizes, the suction port line upstream described in it is provided with pressure gauge three.
Effect of the present invention is:
A kind of ejector system vacuumized for reactor coolant loop of the present invention, it is for the vacuum pumping of system in CAP1000 passive PWR nuclear power plant reactor coolant loop start-up course.This system adopts air ejector, is to drive source of the gas, movement-less part, and simple structure list with pressurized air.
This ejector system adopts two single-stage injector parallel connection schemes, not only envelope size is little, and substantially increase rate of air sucked in required, shorten pumpdown time, in 120 minutes, the volume of about 250 cubic metres can be evacuated to 0.01MPa from 0.1MPa, the requirement that CAP1000 reactor coolant loop vacuumizes can be met.
Accompanying drawing explanation
Fig. 1 is a kind of ejector system schematic diagram vacuumized for reactor coolant loop of the present invention;
In figure: 1. propellant suction port pipeline; 2. suction port stop valve; 3. pressure instrument one; 4. sparger one; 5. suction port pipeline; 6. safety check; 7. stop valve one; 8. vacuum breaking pipeline; 9. stop valve two; 10. exhaust line; 11. stop valves three; 12. pressure gauges two; 13. pressure gauges three; 14. spargers two.
Embodiment
Below in conjunction with the drawings and specific embodiments, a kind of ejector system vacuumized for reactor coolant loop of the present invention is further described.
As shown in Figure 1, a kind of ejector system vacuumized for reactor coolant loop of the present invention adopts two injector parallel connection schemes, and two spargers are arranged symmetrically with.
Propellant suction port pipeline 1 is divided into two-way through threeway, connects the entrance of sparger 1 and the entrance of sparger 2 14 respectively, propellant uniform distribution is entered in sparger 1 and sparger 2 14.Described propellant suction port pipeline 1 arranges suction port stop valve 2.
Suction port pipeline 5 is divided into symmetrical two-way through threeway, connects the suction chamber of sparger 1 and the suction chamber of sparger 2 14 respectively, air inlet uniformity is distributed.Described suction port pipeline 5 is provided with safety check 6, prevents gas backflow, is also provided with stop valve 1 simultaneously.
Exhaust line 10 is divided into two-way through threeway, connects the outlet of sparger 1 and the outlet of sparger 2 14 respectively, ensures that the outlet of sparger 1 and the interruption-forming that goes out of sparger 2 14 stablize back pressure.Described exhaust line 10 arranges stop valve 3 11.
Described suction port pipeline 5 is arranged a vacuum breaking pipeline 8, when needs destroy system vacuum, can this pipeline air inlet be passed through.Vacuum breaking pipeline 8 is provided with stop valve 29.
Above-mentioned sparger 1 and sparger 2 14 adopt air ejector, are drive source of the gas with pressurized air.
The suction chamber of sparger 1 is provided with pressure instrument one, and the suction chamber of sparger 2 14 is provided with pressure gauge 2 12, and suction port pipeline 5 upstream is provided with pressure gauge 3 13, for monitoring the performance of sparger.
Ejector system envelope size of the present invention is within 1.9m (length) × 1.5m (wide) × 0.9m (height) scope.In 120 minutes, the volume of about 250 cubic metres can be evacuated to 0.01MPa from 0.1MPa, the requirement that CAP1000 reactor coolant loop vacuumizes can be met.
The installation of ejector system of the present invention and reactor coolant loop is as follows, and propellant suction port pipeline 1, suction port pipeline 5 are connected with reactor coolant loop with exhaust line 10.During operation, close the stop valve 29 on vacuum breaking pipeline 8, open the stop valve 1 on suction port pipeline 5, the stop valve 3 11 on exhaust line 10 and admission line stop valve 2, pressurized gas enter sparger 1 and sparger 2 14, after mixing with the low-pressure gas of suction port pipeline 5, after sparger mixing chamber and diffuser boosting, enter exhaust line 10.When system vacuum reaches requirement, close admission line stop valve 2 and stop valve 1.When needs destroy system vacuum, open stop valve 29.
Claims (4)
1. for the ejector system that reactor coolant loop vacuumizes, it is characterized in that: this ejector system comprises the sparger one (4) and sparger two (14) that symmetry is arranged in parallel;
Propellant suction port pipeline (1) is divided into two-way through threeway, connect the entrance of sparger one (4) and the entrance of sparger two (14) respectively, make propellant uniform distribution enter in sparger one (4) and sparger two (14); Described propellant suction port pipeline (1) arranges suction port stop valve (2);
Suction port pipeline (5) is divided into symmetrical two-way through threeway, connects the suction chamber of sparger one (4) and the suction chamber of sparger two (14) respectively, air inlet uniformity is distributed; Described suction port pipeline (5) is provided with safety check (6) and stop valve one (7);
Exhaust line (10) is divided into two-way through threeway, connect the outlet of sparger one (4) and the outlet of sparger two (14) respectively, ensure that the outlet of sparger one (4) and the interruption-forming that goes out of sparger two (14) stablize back pressure; Described exhaust line (10) arranges stop valve three (11);
Described suction port pipeline (5) is arranged a vacuum breaking pipeline (8), vacuum breaking pipeline (8) is provided with stop valve two (9).
2. a kind of ejector system vacuumized for reactor coolant loop according to claim 1, is characterized in that; Described sparger one (4) and sparger two (14) adopt air ejector, are drive source of the gas with pressurized air.
3. a kind of ejector system vacuumized for reactor coolant loop according to claim 1, is characterized in that; The suction chamber of described sparger one (4) is provided with pressure instrument one, and the suction chamber of described sparger two (14) is provided with pressure gauge two (12).
4. a kind of ejector system vacuumized for reactor coolant loop according to claim 1, is characterized in that; Described suction port pipeline (5) upstream is provided with pressure gauge three (13).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510019450.XA CN104832462A (en) | 2015-01-14 | 2015-01-14 | Ejector system for vacuum-pumping of reactor coolant system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510019450.XA CN104832462A (en) | 2015-01-14 | 2015-01-14 | Ejector system for vacuum-pumping of reactor coolant system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104832462A true CN104832462A (en) | 2015-08-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510019450.XA Pending CN104832462A (en) | 2015-01-14 | 2015-01-14 | Ejector system for vacuum-pumping of reactor coolant system |
Country Status (1)
| Country | Link |
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| CN (1) | CN104832462A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3061179A (en) * | 1960-11-08 | 1962-10-30 | Vac U Max | Suction creating apparatus |
| JPH0914868A (en) * | 1995-06-23 | 1997-01-17 | Mitsubishi Heavy Ind Ltd | Air extractor |
| CN102003419A (en) * | 2010-10-21 | 2011-04-06 | 重庆智得热工工业有限公司 | Steam ejector composite set |
| CN203348043U (en) * | 2013-05-28 | 2013-12-18 | 宋涛 | Efficient vacuum pumping device special for power plant |
| CN203443393U (en) * | 2013-07-10 | 2014-02-19 | 上海赛迩福电力技术有限公司 | Condenser vacuum system provided with steam ejectors |
| CN203772050U (en) * | 2014-03-26 | 2014-08-13 | 上海福宜真空设备有限公司 | Gas condensing device |
| CN204458569U (en) * | 2015-01-14 | 2015-07-08 | 上海核工程研究设计院 | A kind of ejector system vacuumized for reactor coolant loop |
-
2015
- 2015-01-14 CN CN201510019450.XA patent/CN104832462A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3061179A (en) * | 1960-11-08 | 1962-10-30 | Vac U Max | Suction creating apparatus |
| JPH0914868A (en) * | 1995-06-23 | 1997-01-17 | Mitsubishi Heavy Ind Ltd | Air extractor |
| CN102003419A (en) * | 2010-10-21 | 2011-04-06 | 重庆智得热工工业有限公司 | Steam ejector composite set |
| CN203348043U (en) * | 2013-05-28 | 2013-12-18 | 宋涛 | Efficient vacuum pumping device special for power plant |
| CN203443393U (en) * | 2013-07-10 | 2014-02-19 | 上海赛迩福电力技术有限公司 | Condenser vacuum system provided with steam ejectors |
| CN203772050U (en) * | 2014-03-26 | 2014-08-13 | 上海福宜真空设备有限公司 | Gas condensing device |
| CN204458569U (en) * | 2015-01-14 | 2015-07-08 | 上海核工程研究设计院 | A kind of ejector system vacuumized for reactor coolant loop |
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Application publication date: 20150812 |