WO1999047854A1 - Method and device for measuring the reject water flow in a steam generator - Google Patents
Method and device for measuring the reject water flow in a steam generator Download PDFInfo
- Publication number
- WO1999047854A1 WO1999047854A1 PCT/FI1999/000187 FI9900187W WO9947854A1 WO 1999047854 A1 WO1999047854 A1 WO 1999047854A1 FI 9900187 W FI9900187 W FI 9900187W WO 9947854 A1 WO9947854 A1 WO 9947854A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- level
- water
- reject
- sensor
- level sensor
- Prior art date
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F11/00—Apparatus requiring external operation adapted at each repeated and identical operation to measure and separate a predetermined volume of fluid or fluent solid material from a supply or container, without regard to weight, and to deliver it
- G01F11/28—Apparatus requiring external operation adapted at each repeated and identical operation to measure and separate a predetermined volume of fluid or fluent solid material from a supply or container, without regard to weight, and to deliver it with stationary measuring chambers having constant volume during measurement
- G01F11/284—Apparatus requiring external operation adapted at each repeated and identical operation to measure and separate a predetermined volume of fluid or fluent solid material from a supply or container, without regard to weight, and to deliver it with stationary measuring chambers having constant volume during measurement combined with electric level detecting means
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F3/00—Measuring the volume flow of fluids or fluent solid material wherein the fluid passes through the meter in successive and more or less isolated quantities, the meter being driven by the flow
- G01F3/36—Measuring the volume flow of fluids or fluent solid material wherein the fluid passes through the meter in successive and more or less isolated quantities, the meter being driven by the flow with stationary measuring chambers having constant volume during measurement
- G01F3/38—Measuring the volume flow of fluids or fluent solid material wherein the fluid passes through the meter in successive and more or less isolated quantities, the meter being driven by the flow with stationary measuring chambers having constant volume during measurement having only one measuring chamber
Definitions
- the invention relates to the production of pure distillate or water steam. Particularly, the invention is directed to a method of measuring the reject water flow of a still or steam generator using level sensors.
- Water steam of high quality is required, for example in pharmaceutical and biotechnical production, for sterilization and other purposes.
- Especially pure steam can be defined as "water for injection” in the gas phase.
- water for injection in the gas phase.
- it is thus also pyrogen free.
- the product flow thus arrives at the lowermost point of the device, turns 180° and then flows in a spiral pattern upwards, whereby impurities separate by centrifugal force to the periphery of the spiral path and depart, flowing downwards as the pure product flow continues it upward motion.
- a small volume of water is formed in the bottom section of the device, the impurities thus collecting into that volume.
- This amount of water having a certain ratio to the amount of produced steam, exits as a reject stream. For retaining the quality of the produced steam, said ratio must be kept within certain limits.
- distillate may be produced by condensing the product steam to water.
- a method according to claim 1 has now been invented for measuring the amount of reject water from a steam generator or a still, in which two level sensors, provided in the reject water exit tube with a specified vertical distance relative to each other, control a valve arranged below said sensors to effect opening of the valve as the water level reaches the up- per level sensor, .and to effect closing of the valve as the water level reaches the lower level sensor.
- a further object of the invention is a device according to claim 2, comprising a non- horizontal reject water exit tube or a branch or vessel connected thereto provided with a first level sensor to indicate a water level reaching said first level sensor, and at a lower level than said first level sensor a second level sensor to indicate a water level reaching said second level sensor, and at a lower level than said second level sensor a valve arranged to open by the signal from the first level sensor, .and to close by the signal from the second level sensor.
- the level sensors are provided in a branch of the exit tube, the lower end of which branch communicates with the exit tube above the valve, while the upper end communicates with the bottom section of the still or steam generator.
- the level sensors may be fitted in the exit tube proper, or in any side vessel communicating with the exit tube so as to provide a common water level.
- the type of level sensor may be swimmer-switch, inductive, or any other type suitable for the conditions, as the person skilled in the art will contemplate.
- the ambiguities relating to the measurement of reject water connected with the solutions according to the prior art are avoided.
- the volume corresponding to the vertical distance of the level sensors is known, and the rate of opening and closing of the valve is recorded over time, the water flow per unit time can be determined.
- the reject ratio of the still or steam generator is easily calculated by means of control electronics well known to the skilled person. 3
- the system may include additional level sensors, for example mounted on a higher level than the aforementioned upper sensor.
- additional level sensors for example mounted on a higher level than the aforementioned upper sensor.
- Such a sensor may provide, for example, a high level alarm indicating malfunction of the sensors below.
- Figure 1 shows a schematic view of a steam generator according to the invention; the generator may constitute part of a still apparatus.
- Preheated feed water enters the still or steam generator (1) through line (2) and evaporates in the downflow channels (3), heat being transferred from the heating steam (4).
- the flow makes a 180° turn, and is freed of droplets and foreign matter in the upflow channels (6).
- a minor volume of water en- riched in impurities is formed in said upflow channel and collects in the bottom section (5) of the device, and exits as a reject stream through line (7).
- a branch (8) is provided in line (7), the upper part of which branch communicates with the bottom section of the still or steam generator.
- Sensor (10) thereby transmits a signal to the control system, which opens valve (9). Water flows out until the level reaches sensor (11), the signal of which effects the closing of valve (9).
- the volume of tubing (7,8) corresponding to the vertical distance of level sensors (10,11) is easily determined; as the control electronics monitors the rate of opening of valve (9), the flow rate of reject water is thus defined with sufficient accuracy.
- the product steam is condensed in condenser (12).
Landscapes
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Measuring Volume Flow (AREA)
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU27304/99A AU2730499A (en) | 1998-03-13 | 1999-03-12 | Method and device for measuring the reject water flow in a steam generator |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FI980562 | 1998-03-13 | ||
FI980562A FI980562A (en) | 1998-03-13 | 1998-03-13 | Method and apparatus for measuring the wastewater flow from a steam generator or distillator |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1999047854A1 true WO1999047854A1 (en) | 1999-09-23 |
Family
ID=8551245
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/FI1999/000187 WO1999047854A1 (en) | 1998-03-13 | 1999-03-12 | Method and device for measuring the reject water flow in a steam generator |
Country Status (3)
Country | Link |
---|---|
AU (1) | AU2730499A (en) |
FI (1) | FI980562A (en) |
WO (1) | WO1999047854A1 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2019021556A1 (en) * | 2017-07-26 | 2019-01-31 | オルガノ株式会社 | Water-collection dispenser and correction method therefor |
CN113674885A (en) * | 2021-06-30 | 2021-11-19 | 中国核电工程有限公司 | Debugging method for accident discharge pipeline of steam generator blowdown system of pressurized water reactor nuclear power plant |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP5961962B2 (en) * | 2011-09-28 | 2016-08-03 | 三浦工業株式会社 | Boiler steam amount measuring method, boiler load analyzing method, boiler steam amount measuring device, and boiler load analyzing device |
Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3125881A (en) * | 1964-03-24 | Rate of flow meter | ||
US3875017A (en) * | 1971-04-22 | 1975-04-01 | Saari R V J | Multi-stage thin film evaporator having a helical vapor flow path |
DE2554473A1 (en) * | 1975-12-04 | 1977-06-08 | Gerdts Gustav F Kg | DEVICE FOR MONITORING THE AMOUNT OF A FLOW MEDIUM |
US4906165A (en) * | 1988-09-09 | 1990-03-06 | Fox Ronald L | Flow meter for a positive displacement pump |
US5058194A (en) * | 1988-01-08 | 1991-10-15 | Societe Cooperative De Production Bourgeois | Steam generator for cooking appliances |
EP0518788A1 (en) * | 1991-06-10 | 1992-12-16 | SOCIETE COOPERATIVE DE PRODUCTION BOURGEOIS (Société Coopérative de Production Anonyme à Capital Variable) | Pressure regulated steam generator |
GB2286048A (en) * | 1994-01-26 | 1995-08-02 | Spirax Sarco Ltd | Flow meters |
US5511950A (en) * | 1994-08-05 | 1996-04-30 | Shin-Ei Kabushiki Kaisha | Vacuum pumps for recovering condensates from steam-using apparatus |
EP0772000A1 (en) * | 1995-10-31 | 1997-05-07 | Seb S.A. | Steam generator with automatic feeding and process for measuring liquid level in such a steam generator |
-
1998
- 1998-03-13 FI FI980562A patent/FI980562A/en unknown
-
1999
- 1999-03-12 WO PCT/FI1999/000187 patent/WO1999047854A1/en active Application Filing
- 1999-03-12 AU AU27304/99A patent/AU2730499A/en not_active Abandoned
Patent Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3125881A (en) * | 1964-03-24 | Rate of flow meter | ||
US3875017A (en) * | 1971-04-22 | 1975-04-01 | Saari R V J | Multi-stage thin film evaporator having a helical vapor flow path |
DE2554473A1 (en) * | 1975-12-04 | 1977-06-08 | Gerdts Gustav F Kg | DEVICE FOR MONITORING THE AMOUNT OF A FLOW MEDIUM |
US5058194A (en) * | 1988-01-08 | 1991-10-15 | Societe Cooperative De Production Bourgeois | Steam generator for cooking appliances |
US4906165A (en) * | 1988-09-09 | 1990-03-06 | Fox Ronald L | Flow meter for a positive displacement pump |
EP0518788A1 (en) * | 1991-06-10 | 1992-12-16 | SOCIETE COOPERATIVE DE PRODUCTION BOURGEOIS (Société Coopérative de Production Anonyme à Capital Variable) | Pressure regulated steam generator |
GB2286048A (en) * | 1994-01-26 | 1995-08-02 | Spirax Sarco Ltd | Flow meters |
US5511950A (en) * | 1994-08-05 | 1996-04-30 | Shin-Ei Kabushiki Kaisha | Vacuum pumps for recovering condensates from steam-using apparatus |
EP0772000A1 (en) * | 1995-10-31 | 1997-05-07 | Seb S.A. | Steam generator with automatic feeding and process for measuring liquid level in such a steam generator |
Non-Patent Citations (4)
Title |
---|
DERWENT'S ABSTRACT, No. 86-270323/41, Week 8641; & SU 1211505 A (BELGOROD POWER ENG) 15 February 1986. * |
PATENT ABSTRACTS OF JAPAN, Vol. 8, No. 153, (P-287); & JP 59050316 A (MITSUBISHI KASEI KOGYO K.K.) 23 March 1984. * |
PATENT ABSTRACTS OF JAPAN, Vol. 8, No. 169, (P-292); & JP 59065218 A (EBARA SEISAKUSHO K.K.) 13 April 1984. * |
PATENT ABSTRACTS OF JAPAN; & JP 9085229 A (TOYOBO CO LTD) 31 March 1997. * |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2019021556A1 (en) * | 2017-07-26 | 2019-01-31 | オルガノ株式会社 | Water-collection dispenser and correction method therefor |
JP2019027822A (en) * | 2017-07-26 | 2019-02-21 | オルガノ株式会社 | Water sampling dispenser and correction method of the same |
CN110914650A (en) * | 2017-07-26 | 2020-03-24 | 奥加诺株式会社 | Water dispenser and calibration method thereof |
CN110914650B (en) * | 2017-07-26 | 2020-09-11 | 奥加诺株式会社 | Water dispenser and calibration method thereof |
TWI742281B (en) * | 2017-07-26 | 2021-10-11 | 日商奧璐佳瑙股份有限公司 | Water sample dispenser and calibration method thereof |
CN113674885A (en) * | 2021-06-30 | 2021-11-19 | 中国核电工程有限公司 | Debugging method for accident discharge pipeline of steam generator blowdown system of pressurized water reactor nuclear power plant |
Also Published As
Publication number | Publication date |
---|---|
AU2730499A (en) | 1999-10-11 |
FI980562A (en) | 1999-09-14 |
FI980562A0 (en) | 1998-03-13 |
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