CN102737737A - Exhausting method and exhausting apparatus for RFD system - Google Patents
Exhausting method and exhausting apparatus for RFD system Download PDFInfo
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- CN102737737A CN102737737A CN2012101996928A CN201210199692A CN102737737A CN 102737737 A CN102737737 A CN 102737737A CN 2012101996928 A CN2012101996928 A CN 2012101996928A CN 201210199692 A CN201210199692 A CN 201210199692A CN 102737737 A CN102737737 A CN 102737737A
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- Prior art keywords
- vacuum ejector
- feeder channel
- gas
- comb
- ventilation unit
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
Abstract
The invention discloses an exhausting method and an exhausting apparatus for an RFD system. A vacuum ejector (3) is connected with the upper gas space of a feed tank (5) through an exhaust pipe (4) or is directly connected with an expiring pipe (8) through the exhaust pipe (4); the vacuum ejector carries out suction so as to enable negative pressure to be generated in a transduction cylinder (2) which is connected with the vacuum ejector; material liquid in the feed tank (5) is sucked into the transduction cylinder (2); and gas discharged by the vacuum ejector (3) is firstly delivered to the upper gas space of the feed tank (5) through the exhaust pipe (4) to mingle with gas in the feed tank and then enters into a ventilation unit (9) through the expiring pipe (8), or is directly delivered to the expiring pipe (8) through the exhaust pipe (4) and enters into the ventilation unit (9). If operation conditions change and inherent security of the system is destroyed, the RFD system provided in the invention can overcome the problem that radioactive liquid may contaminate a ventilation system and properly reduce installation height of duel-ejector or total height of an equipment room, thereby reducing construction cost.
Description
Technical field
The present invention relates to the exhaust apparatus and the method for exhausting of freedom from repairs conveying equipment for fluid substances in the nuclear industry (RFD system).
Background technology
But reversed flow body pumping system (Reveres Fluidic Device is hereinafter to be referred as RFD) as a kind of fluid delivery system of freedom from repairs, is applied to the conveying of radioactive fluid in the aftertreatment.
The course of work of RFD system is following: RFD system start-up is instantaneous; Vacuum ejector is air-breathing, in the transducing tube, produces negative-pressure gas, and liquid-vaqor interface rises; RFD sucks feed liquid from feeder channel and gets into the accumulation of energy of transducing tube; At this moment, system does not have flow output, and the gas that vacuum ejector is discharged gets into ventilating system through gas outlet; After liquid level arrives setting value; Close vacuum ejector, open the compression injection device simultaneously, system gets into and presses towards the stage; The compression injection device is to transducing tube input barotropic gas; Liquid-vaqor interface descends gradually, and this moment, transducing tube downstream formed positive press liquid, but and directly get into discharge nozzle via reversed flow body pump and effluent; After transducing tube liquid level reached setting value, the barotropic gas in the closes compression thrower, transducing tube began exhaust; But reversed flow body pump is owing to run out of steam; Outflow reduces gradually, is zero until the total system flow, and open vacuum ejector and get into the next back suction accumulation of energy stage this moment; The circulation that goes round and begins again according to this of RFD system forms intermittence and effluents.
In the technology in the past; The gas of discharging during vacuum ejector work directly enters the ventilating system of equipment room; Because in the design of vacuum ejector, considered the security of RFD system, make that the radioactive liquid waste in the transducing bucket can not be inhaled into vacuum ejector or ventilating system.But if working environment changes, this security may be destroyed, and promptly radioactive liquid is got into ventilating system by sucking-off through vacuum ejector, has polluted ventilating system.So in the design and use of RFD system, must consider this problem.
Summary of the invention
To existing deficiency in the prior art; The object of the present invention is to provide the method for exhausting and the device of a kind of RFD system; Can prevent effectively that radioactive liquid from polluting ventilating system, and can suitably reduce the setting height(from bottom) of dual jet or the overall height of canyon, reduce construction costs.
The technical scheme that the present invention adopts by solving the problems of the technologies described above is described as follows:
The method for exhausting of a kind of RFD system; Produce negative pressure by vacuum ejector through air-breathing making in the transducing tube that is attached thereto; Feed liquid in the feeder channel is sucked the transducing tube; The gas that vacuum ejector is discharged gets into ventilation unit, it is characterized in that: the gas that described vacuum ejector is discharged gets into ventilation unit through the comb of exhaling of feeder channel.
Further, the gas that described vacuum ejector is discharged at first is transported to the upper gas space of feeder channel through gas outlet, and with mixed gases in the feeder channel, the comb of exhaling through feeder channel gets into ventilation unit then.
Further, the gas of described vacuum ejector discharge gets into ventilation unit through the comb of exhaling that gas outlet is delivered directly to feeder channel.
The exhaust apparatus of a kind of RFD system; Vacuum ejector is connected with the transducing tube via the compression injection device; But reversed flow body pump is connected with transducing tube, feeder channel and discharge nozzle respectively; Exhale comb to be connected with feeder channel and ventilation unit respectively, it is characterized in that: said vacuum ejector inserts the upper gas space of feeder channel through gas outlet.
The exhaust apparatus of a kind of RFD system; Vacuum ejector is connected with the transducing tube via the compression injection device; But reversed flow body pump is connected with transducing tube, feeder channel and discharge nozzle respectively; Exhale comb to be connected with feeder channel and ventilation unit respectively, it is characterized in that: said vacuum ejector directly inserts through gas outlet and exhales comb.
Beneficial effect of the present invention is following: because the gas that vacuum ejector is discharged among the present invention is transported to the upper gas space of feeder channel earlier through gas outlet, again through exhaling comb to get into ventilation unit, perhaps is delivered directly to through gas outlet and exhales comb to get into ventilation unit; Therefore; If variation has taken place operating conditions, destroyed the inherent safety of system, the method for exhausting and the device of RFD of the present invention system; Can make in the air-breathing process of vacuum ejector; Suck gas outlet to radioactive liquid, and make radioactive liquid directly flow back to feeder channel or, solved the problem that radioactive liquid possibly pollute ventilating system through exhaling comb to flow back to feeder channel; And the present invention can suitably reduce the setting height(from bottom) of dual jet or the overall height of canyon, reduces construction costs.
Description of drawings
Fig. 1 is the RFD system construction drawing of prior art;
Fig. 2 is the system construction drawing of the embodiment of the invention 1;
Fig. 3 is the system construction drawing of the embodiment of the invention 2.
Embodiment
Present invention is described below in conjunction with accompanying drawing and specific embodiment.
The method for exhausting of a kind of RFD of the present invention system; The gas that vacuum ejector 3 is discharged is transported to the upper gas space of feeder channel 5 earlier through gas outlet 4; Through exhaling comb 8 to get into ventilation unit 9, perhaps be delivered directly to and exhale comb 8 to get into ventilation unit 9 again through gas outlet 4.
The exhaust apparatus of a kind of RFD of the present invention system, but comprise that gas outlet 4, transducing tube 2 reversed flow body pumps 6, the feeder channel 5 of compression injection device 1, vacuum ejector 3, vacuum ejector, exhale comb 8, discharge nozzle 7 and the equipment room of feeder channel play the gas exhaust piping of connection effect.Vacuum ejector 3 is connected with transducing tube 2 through compression injection device 1; But reversed flow body pump 6 is connected with transducing tube 2, feeder channel 5 and discharge nozzle 7 respectively; Exhale comb 8 to be connected with feeder channel 5 and ventilation unit 9 respectively; Vacuum ejector 3 inserts the upper gas space of feeder channels 5 through gas outlet 4, or inserts through gas outlet 4 and to exhale comb 8.
In the past, as shown in Figure 1, the gas outlet of vacuum ejector directly was connected with the equipment room gas exhaust piping, if working environment changes, radioactive liquid can be got into ventilating system through vacuum ejector, thereby can pollute ventilating system by sucking-off.
Among the present invention, the gas outlet 4 of vacuum ejector 3 be connected with two kinds of schemes: the upper gas space of 1, directly inserting feeder channel 5; 2, be connected with the comb 8 of exhaling of feeder channel 5.
In the scheme 1, from the gas of vacuum ejector 3 through gas outlet 4 earlier with the upper gas space of feeder channel 5 in gas mix, again through exhaling comb 8 entering ventilation units 9; If radioactive liquid gets into gas outlet 4 through vacuum ejector 3, then can be back to feeder channel 5, and can not pollute ventilating system.
In the scheme 2, link to each other with the comb 8 of exhaling of feeder channel through gas outlet 4, enter ventilation unit 9 through exhaling comb 8 from the gas of vacuum ejector 3; If radioactive liquid gets into gas outlet 4 through vacuum ejector 3, then can under action of gravity, flow automatically to feeder channel 5, and can not pollute ventilating system.
In one embodiment of the present of invention; As shown in Figure 2; Vacuum ejector 3 warps are connected with transducing tube 2; But reversed flow body pump 6 is connected with transducing tube 2, feeder channel 5 and discharge nozzle 7 respectively, exhales comb 8 to be connected with feeder channel 5 and ventilation unit 9 respectively, and said vacuum ejector 3 inserts the upper gas space of feeder channel 5 through gas outlet 4.
In an alternative embodiment of the invention; As shown in Figure 3; Vacuum ejector 3 is connected with transducing tube 2 through compression injection device 1; But reversed flow body pump 6 is connected with transducing tube 2, feeder channel 5 and discharge nozzle 7 respectively, exhales comb 8 to be connected with feeder channel 5 and ventilation unit 9 respectively, and said vacuum ejector 3 directly inserts through gas outlet 4 and exhales comb 8.
When starting the RFD system, vacuum ejector 3 is air-breathing, in transducing tube 2, produces negative-pressure gas; Liquid-vaqor interface rises, and gets into 2 accumulation of energys of transducing tube but reversed flow body pump 6 sucks feed liquid from feeder channel 5, at this moment; The RFD system does not have flow output, and the gas that vacuum ejector 3 is discharged is transported to the upper gas space of feeder channel 5 earlier through gas outlet 4, and the comb 8 of exhaling that warp is connected with feeder channel 5 again gets into ventilation units 9; At this moment; From the gas of vacuum ejector 3 through gas outlet 4 earlier with the upper gas space of feeder channel 5 in gas mixes, again through exhaling comb 8 entering ventilation units 9, if radioactive liquid is through vacuum ejector 3 entering gas outlets 4; Then can be back to feeder channel 5, and can not pollute ventilating system; Perhaps, be delivered directly to by gas outlet 4 and exhale comb 8, get into ventilation unit 9, at this moment,, then can under action of gravity, flow automatically to feeder channel 5, and can not pollute ventilating system if radioactive liquid gets into gas outlets 4 through vacuum ejector 3; After liquid level arrives setting value; Close vacuum ejector 3, open compression injection device 1 simultaneously, system gets into and presses towards the stage; Compression injection device 1 is to transducing tube 2 input barotropic gas; Liquid-vaqor interface descends gradually, and this moment, transducing tube downstream formed positive press liquid, but and directly get into discharge nozzles 7 via reversed flow body pump 6 and effluent; After the liquid level of transducing tube 2 reached setting value, the barotropic gas in the closes compression thrower 1, transducing tube 2 began exhaust, but reversed flow body pump 6 owing to run out of steam, it is zero that outflow reduces until the total system flow gradually; Open vacuum ejector 3 this moment, gets into the next back suction accumulation of energy stage, the circulation that goes round and begins again according to this of RFD system, and the formation intermittence is effluented.
Because the gas that vacuum ejector is discharged among the present invention is transported to the upper gas space of feeder channel earlier through gas outlet, again through exhaling comb to get into ventilation unit, perhaps is delivered directly to through gas outlet and exhales comb to get into ventilation unit; Therefore; If variation has taken place in operating conditions, destroyed the inherent safety of system, have the RFD system of this structure; Can make in the air-breathing process of vacuum ejector 3; Suck gas outlet 4 to radioactive liquid, and make radioactive liquid directly flow back to feeder channel 5 or, solved the problem that radioactive liquid possibly pollute ventilating system through exhaling comb 8 to flow back to feeder channel 5; And the present invention can suitably reduce the setting height(from bottom) of dual jet or the overall height of canyon, reduces construction costs.
It should be noted that; Above-mentioned specific embodiment only is exemplary; Under above-mentioned instruction of the present invention, those skilled in the art can carry out various improvement and distortion on the basis of the foregoing description, and these improve or distortion all drops in protection scope of the present invention.It will be understood by those skilled in the art that top specific descriptions just in order to explain the object of the invention, are not to be used to limit the present invention.Protection scope of the present invention is limited claim and equivalent thereof.
Claims (5)
1. the method for exhausting of a RFD system; Produce negative pressure by vacuum ejector through air-breathing making in the transducing tube that is attached thereto; Feed liquid in the feeder channel is sucked the transducing tube; The gas that vacuum ejector is discharged gets into ventilation unit, it is characterized in that: the gas that described vacuum ejector is discharged gets into ventilation unit through the comb of exhaling of feeder channel.
2. the method for exhausting of RFD as claimed in claim 1 system; It is characterized in that: the gas that described vacuum ejector is discharged at first is transported to the upper gas space of feeder channel through gas outlet; With mixed gases in the feeder channel, the comb of exhaling through feeder channel gets into ventilation unit then.
3. the method for exhausting of RFD as claimed in claim 1 system is characterized in that: the gas that described vacuum ejector is discharged gets into ventilation unit through the comb of exhaling that gas outlet is delivered directly to feeder channel.
4. the exhaust apparatus of a RFD system; Vacuum ejector (3) is connected with transducing tube (2) via compression injection device (1); But reversed flow body pump (6) is connected with transducing tube (2), feeder channel (5) and discharge nozzle (7) respectively; Exhale comb (8) to be connected with feeder channel (5) and ventilation unit (9) respectively, it is characterized in that: said vacuum ejector (3) inserts the upper gas space of feeder channel (5) through gas outlet (4).
5. the exhaust apparatus of a RFD system; Vacuum ejector (3) is connected with transducing tube (2) via compression injection device (1); But reversed flow body pump (6) is connected with transducing tube (2), feeder channel (5) and discharge nozzle (7) respectively; Exhale comb (8) to be connected with feeder channel (5) and ventilation unit (9) respectively, it is characterized in that: said vacuum ejector (3) directly inserts through gas outlet (4) and exhales comb (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210199692.8A CN102737737B (en) | 2012-06-14 | 2012-06-14 | Exhausting method and exhausting apparatus for RFD system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210199692.8A CN102737737B (en) | 2012-06-14 | 2012-06-14 | Exhausting method and exhausting apparatus for RFD system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102737737A true CN102737737A (en) | 2012-10-17 |
| CN102737737B CN102737737B (en) | 2015-05-20 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201210199692.8A Active CN102737737B (en) | 2012-06-14 | 2012-06-14 | Exhausting method and exhausting apparatus for RFD system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103233885A (en) * | 2013-04-09 | 2013-08-07 | 中国核电工程有限公司 | Differential pressure and pressure combined control method and system for fluid delivery system of reversible fluid pump |
| CN103258578A (en) * | 2013-04-09 | 2013-08-21 | 中国核电工程有限公司 | Transducer drum convenient for monitoring upper-limit liquid level state |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4521162A (en) * | 1983-05-24 | 1985-06-04 | British Nuclear Fuels Plc | Pumping system |
| US4606703A (en) * | 1984-04-04 | 1986-08-19 | United Kingdom Atomic Energy Authority | Fluidic pumping systems with control means responsive to liquid level |
| WO2006103435A1 (en) * | 2005-03-31 | 2006-10-05 | British Nuclear Fuels Plc | Use of fluidic pumps |
| CN102169351A (en) * | 2011-05-11 | 2011-08-31 | 清华大学 | Maintenance-free high liquid level control system and method of ballast |
-
2012
- 2012-06-14 CN CN201210199692.8A patent/CN102737737B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4521162A (en) * | 1983-05-24 | 1985-06-04 | British Nuclear Fuels Plc | Pumping system |
| US4606703A (en) * | 1984-04-04 | 1986-08-19 | United Kingdom Atomic Energy Authority | Fluidic pumping systems with control means responsive to liquid level |
| WO2006103435A1 (en) * | 2005-03-31 | 2006-10-05 | British Nuclear Fuels Plc | Use of fluidic pumps |
| CN102169351A (en) * | 2011-05-11 | 2011-08-31 | 清华大学 | Maintenance-free high liquid level control system and method of ballast |
Non-Patent Citations (1)
| Title |
|---|
| 李江云 等: "RFD装置优化设计理论及方法研究", 《工程热物理学报》, vol. 31, no. 10, 15 October 2010 (2010-10-15) * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103233885A (en) * | 2013-04-09 | 2013-08-07 | 中国核电工程有限公司 | Differential pressure and pressure combined control method and system for fluid delivery system of reversible fluid pump |
| CN103258578A (en) * | 2013-04-09 | 2013-08-21 | 中国核电工程有限公司 | Transducer drum convenient for monitoring upper-limit liquid level state |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102737737B (en) | 2015-05-20 |
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