CN1051243C - Degasifying apparatus - Google Patents
Degasifying apparatus Download PDFInfo
- Publication number
- CN1051243C CN1051243C CN94108765A CN94108765A CN1051243C CN 1051243 C CN1051243 C CN 1051243C CN 94108765 A CN94108765 A CN 94108765A CN 94108765 A CN94108765 A CN 94108765A CN 1051243 C CN1051243 C CN 1051243C
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- China
- Prior art keywords
- feedwater
- steam
- nozzle
- stream
- open
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- 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.)
- Expired - Lifetime
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D19/00—Degasification of liquids
- B01D19/0042—Degasification of liquids modifying the liquid flow
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/20—Treatment of water, waste water, or sewage by degassing, i.e. liberation of dissolved gases
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Organic Chemistry (AREA)
- Physical Water Treatments (AREA)
- Degasification And Air Bubble Elimination (AREA)
Abstract
A degasser efficiently deaerate supplied water by eliminating trouble caused by that the flow of the supplied water in a water storage part doest not become constant. A large number of baffle plates forming a meandering passage 11 toward a supplied water outlet 6 are arranged in a water storage part 4. Two buffle plates 12 constitute one set and one of them is provided so as to follow the extending direction of a bubbling nozzle 5 from a steam header 8 and the other one of them is provided so as to follow the extending direction of the bubbling nozzle 5 in the same way from the inner surface of a shell 1.
Description
For example the present invention relates to the dissolved oxygen in the feedwater of the feed water system of boiler in thermal power plant etc. is separated the degasser that uses when removing.
Corrosion phenomenon in the boiler feedwater in the content of dissolved oxygen and the boiler has very dark relation, separates the degasser of extracting dissolved oxygen in the feedwater out so all be provided with in the water supply system in most of thermal power plant by steam heated.In general, this kind degasser majority is provided with isolated system, but also have degasser is assembled in the condenser.
The basic principle of this kind degassing is to cause the material diffusion with the concentration imbalance, and degree of unbalancedness heals big material translational speed sooner, and the shorter speed of displacement sooner during the material diffusion.Therefore, the structure major part of degasser employing in the past is conceived to enlarge contact area by stirring and miniaturization to feedwater.
Figure 11 illustrates the example of a kind of expansion type degasser in the conventional art.Feedwater enters in the container via the feed-water intake 2 that is located at housing 1 top, and by sprayer 3 ejections.Water storing unit 4 places of feedwater after the ejection in housing 1 compile and flow to water out 6 from the outside of effervescent nozzle 5, are heated the back during this period and flow out from giving water out 6.
On the other hand, steam 7 enters the steam header 8 that extends along housing 1 length direction through the steam inlet, be assigned to the effervescent nozzle 5 that is wearing a plurality of open-works respectively again, this steam from the open-work of effervescent nozzle 5 after water storing unit 4 ejections, in feedwater, rise on one side, directly contact and the heating of will feeding water with feedwater on one side, and simultaneously dissolved oxygen is outgased.Steam further rises again, arrives Steam Heating portion 9, directly contacts with the feedwater that sprays from sprayer 3, outgases in heated feed water, and wherein a part of steam flows to external container with the oxygen that is separated through leakage port 10.In above-mentioned expansion type degasser, in the feedwater flow of water storing unit 4, mixing from feed-water intake 2 to the overall current of giving water out 6, with the locality current that under the stirring of the steam that sprays from effervescent nozzle 5, get muddled and form, and can not keep certain stream because of feedwater.
The degassing is carried out respectively in each effervescent nozzle 5 theres, most of feedwater is made oxygen concentration reduce when the high state of oxygen concentration arrives to water out 6 gradually by the degassing, but often because the steam that sprays from effervescent nozzle 5 causes the current disorder, and making the water that once has been lowered oxygen concentration be driven the high feed-water intake of oxygen concentration 2 sides, vegetables is that the feedwater that oxygen concentration is high is taken to water out 6 sides under the state without the degassing.Because the instability of current stream need be operated especially for making being evenly distributed of dissolved oxygen concentration in the degasser, for example, for the concentration that makes dissolved oxygen drops to the following long time that needs of boiler required value (below be called " requiring concentration ").These all are the drawbacks that feedwater stream instability is brought.
In addition, sneaking in feedwater makes bubble among feedwater flows into the machine, for example feed pump etc. of water supply system under the state that bubble is not drawn out of, can cause harmful effect to machine.
The object of the present invention is to provide a kind of can the elimination because of the unstable drawback that produces of the feedwater flow of water storing unit, the degasser that also can outgas to feedwater effectively.
For achieving the above object, degasser of the present invention, have by a plurality of and be communicated with the steam header and have an ejection mechanism that the nozzle of a plurality of open-works constitutes, each open-work of described nozzle is facing to the water storing unit in the housing, being sprayed onto in the feedwater by open-work by the heating steam that described steam header is introduced described nozzle, it is characterized in that, the feedwater that is sent to described water storing unit arrives in the process of water out, form the stream that crawls along the route of setting, so that contact with heating steam from described nozzle open-work ejection, the described stream that crawls forms by using a plurality of baffle plates, for making feedwater and doing in opposite directions from the steam bubble of the heating steam of said nozzle open-work ejection or parallel mobilely be arranged to above-mentioned each baffle plate parallel with the bearing of trend of said nozzle respectively.
The present invention considers the feedwater stream instability problem of water storing unit in the degasser, for example the feedwater that dissolved oxygen content is high is driven the problem to water out under inabundant and heating steam state of contact, thereby form fixedly stream at water storing unit, promptly, the feedwater that is sent to water storing unit arrives in the process of water out, form the stream that crawls along the route of setting, so that contact with the heating steam that sprays from the nozzle open-work.Usually, the steam of effervescent nozzle in being located at stream ejection can form bubble feedwater to rising, therefore, the present invention has disposed the stream component parts, flows in opposite directions or concurrent flow so that the feedwater current constitute with above-mentioned bubble.Like this, feedwater just can be flowed as the bending shape that crawls along the stream that is made of the stream component parts, has been heated effectively when giving water out when arriving.For example when forming the stream that flows in opposite directions, steam bubble just rises with the form with the flow reversal that becomes sinking, thereby the rate of climb is slowed down, and the time of passing through in feedwater is elongated, and the time of contact of steam bubble and feedwater is also just elongated.Can make feed temperature rise soon especially like this, thereby improve degassing efficiency widely.Therefore, can realize utilizing economically heating steam to come for giving water degasification.
Because feedwater is along the path flows of setting, its each concentration that all can reduce dissolved oxygen that contacts with heating steam, therefore, do not exist and installed the sort of different feedwater of the dissolved oxygen concentration problem mixed in together that makes in the past, can make dissolved oxygen concentration drop to required value at short notice.For example accelerate boiler during the starting time in hope, the present invention just can satisfy this requirement easily.
Fig. 2 illustrates the comparable situation of dissolved oxygen concentration distribution curve between the present invention and the prior art, and as seen from the figure, dissolved oxygen concentration distribution curve a of the present invention is bigger than the gradient of the curve b of prior art, shows to reach the requirement concentration value at short notice.
Brief Description Of Drawings is as follows:
Fig. 1 (a) and (b) are sectional drawings of an embodiment of degasser of the present invention.
Fig. 2 is the performance diagram that is shown to the dense distribution situation of oxygen in water.
Fig. 3 (a) and (b) are sectional drawings of another embodiment of the present invention.
Fig. 4 (a) and (b) are sectional drawings of another embodiment of the present invention.
Fig. 5 (a) and (b) are sectional drawings of another embodiment of the present invention.
Fig. 6 is the sectional drawing of another embodiment of the present invention.
Fig. 7 is the curve map that is shown to the coolant-temperature gage distribution situation.
Fig. 8 is the calcspar that shows the details of adjuster shown in Figure 6.
Fig. 9 (a) and (b) and the curve map that (c) is the steam emitted dose of demonstration adding adjuster.
Figure 10 is the figure that is used to illustrate an example of starting method of the present invention.
Figure 11 is the sectional drawing of degasser in the past.
Below in conjunction with accompanying drawing embodiments of the invention are described.
In Fig. 1 (a), flow to for formation in the water storing unit 4 of stream 11 in housing 1 that crawl of admission port 6 a plurality of baffle plates 12 are set.In the present embodiment, baffle plate 12 constitutes one group to be fixed on housing 1 inner face one and of being fixed on the steam header 8, baffle group is correspondingly disposed with the ejection mechanism that is made of a plurality of effervescent nozzles 5 (with reference to Fig. 1 (b)) again.Promptly, in every group of baffle plate 12, be fixed on the baffle plate of steam header 8 sides and the bearing of trend of effervescent nozzle 5 and extend abreast, and development length is identical substantially with effervescent nozzle 5, the baffle plate of case side also is that the bearing of trend with effervescent nozzle 5 extends abreast, above water storing unit 4 near.
In addition other of water supply system mainly constructed identical with conventional art basically.The structure of heating steam system does not in addition change with prior art basically yet.
Effect to degasser with said structure is illustrated below.
Feedwater enters in the container via feed-water intake 2, and is ejected in the Steam Heating portion 9 by sprayer 3.At this moment, the steam that feedwater becomes in tiny water droplet and the space abrim contact, and is heated and makes the temperature rising, wherein a part ofly separates because of the temperature that reaches capacity makes dissolved oxygen.
In addition, steam turns to steam bubble and rises in the mobile feedwater of crawling in water storing unit 4 on one side through the ejection of the open-work of each effervescent nozzle 5, on one side the heating of will feeding water.Heating is risen feed temperature, and dissolved oxygen is just outgased when reaching capacity temperature.
At this moment, feedwater flow along baffle plate 12 forms sinking with respect to the steam bubble that rises in feedwater, steam bubble adverse current in feedwater flow is in opposite directions risen, thereby reduced the rate of climb, elongated passing through the time in feedwater, so just make lengthening time of contact of steam bubble and feedwater, feedwater is heated effectively.Thereafter, steam bubble enters Steam Heating portion 9 through the interface between water storing unit 4 and the Steam Heating portion 9, and is flooded with space there.
In having the degasser of said structure, when feedwater is flowed, make in opposite directions mobile in water storing unit 4, thereby extended time of contact with steam bubble at the various piece and the vapour bubble of the stream 11 that crawls, the temperature of having accelerated feedwater in various piece rises, and has improved degassing efficiency widely.Therefore, can rationally effectively utilize heating steam.In addition, feedwater contacts with heating steam along set route, and each contact can both reduce the concentration of dissolved oxygen, requires concentration so can dissolved oxygen concentration be dropped to.In addition, be in flow regime owing to contain the feedwater of steam bubble until the water storing unit surface always, so under the state that feedwater is flowed, in a single day steam bubble arrives the interface between Steam Heating portion and the water storing unit, just from feedwater, separate immediately and transfer to Steam Heating portion, therefore, not having steam bubble is mixed under situation about not being drawn out of and is discharged from degasser in the feedwater.
Referring now to Fig. 3 an alternative embodiment of the invention is described.In the present embodiment, feedwater contacts with heating steam along the line of setting, and this point is identical with a last embodiment.But in the present embodiment, every group of baffle plate facing to the ejection mechanism that is made of effervescent nozzle 5 is configured to make the flow direction of feedwater consistent with the heating steam stream of rising.From the steam bubble of the open-work of effervescent nozzle 5 ejection to feedwater along the direction identical with feedwater, be the direction of upwelling, flow to the interface between water storing unit 4 and the heating steam portion 9.Can give the energy of flow to feedwater along the same flow direction of feedwater, the steam bubble that promptly flows, thereby play the stable effect of mobile maintenance that makes feedwater in the water storing unit 4 with concurrent flow.
Referring now to Fig. 4 explanation another embodiment different with the foregoing description.In the present embodiment, set the baffle plate 12 (not containing 1 preparation baffle plate) of the minimum number of corresponding ejection mechanism (constituting by 7 nozzles in an embodiment), replace among the embodiment of front at each effervescent nozzle 1 group of baffle plate of relative set all, and form the stream 11 that crawls with this.In the stream 11 that crawls that is formed by minority baffle plate 12, mixing the feedwater that exists respectively among two embodiment in front and stream in opposite directions and the concurrent flow between the steam bubble, in the present embodiment, stream part and concurrent flow partly are alternately formation in opposite directions.
Like this, present embodiment just can reach this effect of stablizing that partly realizes the good degassing and partly kept feedwater flow by concurrent flow by flowing in opposite directions.
Refer again to Fig. 5 another one embodiment is described.The stream 11 that crawls in the present embodiment is identical with the embodiment of above-mentioned Fig. 4, but steam header 8 is located near the bottom center of water storing unit 4, and is provided with on this steam header 8 respectively towards the horizontally extending effervescent nozzle 5 of the inwall of housing 1.The effect of present embodiment is identical substantially with the embodiment of above-mentioned Fig. 4.
More than each embodiment all be the example that can improve the degasifying effect of degasser, the present invention also can have other effect.
Fig. 6 illustrates the most preferred embodiment that can shorten the starting time and save the degasser of process steam use amount.
Each several part at the stream 11 that crawls be not provided with the thermometer 14 that is used to detect the oxygen densitometer 13 of dissolved oxygen concentration and is used to detect coolant-temperature gage, and the oxygen concentration signals and the temperature signal of their output are imported into the adjuster 15 that is used to regulate the heating steam amount that flows into steam header 8.In addition, be situated between on the jet chimney that links with steam header 8 and adorning control valve 16, this valve can be according to the aperture of coming control valve by the control signal of adjuster 15 inputs.
For outgasing effectively, be necessary to make the feedwater temperature that reaches capacity as soon as possible, and supply with heating steam according to the distribution of temperature.As shown in Figure 7, the Temperature Distribution situation of feedwater is in the degasser, and the feed-water intake side of introducing feedwater is a low-temperature region.Therefore, according to this Temperature Distribution situation, supply with the fully heating steam of amount to low-temperature region, and supply with more a spot of heating steam to other zone.
Referring now to Fig. 8 a specific embodiment is described.The signal of oxygen densitometer 13 within the housing 1 and thermometer 14 outputs imports adjuster 15 into.Adjuster 15 is made of the operational part and the output signal converter section of detection signal AD converter section, control computer or all-purpose computer etc.In addition, detected pressure value or pressure set points in the housing 1 in adjuster 15, have been imported, so that calculate the saturation temperature with respect to this pressure of feedwater.Again will be in certain zone the feed temperature in the detected housing 1 and the difference between the saturation temperature calculate.When feed temperature is compared the feasible value that is lower than setting with saturation temperature, the aperture signal that adjuster just can make maximum steam flow pass through to control valve 16 inputs.
On the other hand, feed temperature in certain zone in feasible value with interior and with saturation temperature when roughly the same, steam flow in this zone is just decided its control flow by the measured value of dissolved oxygen concentration, at the dissolved oxygen concentration change curve that has stored in advance in the adjuster 15 shown in Fig. 9 (a), be in which kind of level ((1) of Fig. 9 (a)～(8)) according to detected dissolved oxygen and shown in (1)～(8) of (1)～(8) of Fig. 9 (b) or Fig. 9 c, decide the spray volume of steam like that.
According to the steam flow curve of Fig. 9 (b), can to feed-water intake 2 closely be close to the steam of supplying with maximum so that feed temperature rises to saturation temperature rapidly.According to the steam emitted dose characteristic curve of Fig. 9 (c), when the dissolved oxygen concentration at feed-water intake 2 places when setting value is above, can supply with steam equably to each control valve 16.No matter belong to above-mentioned which kind of situation, when the dissolved oxygen concentration at 2 places, admission port has reached (curves of (6)～(8)) below the setting value, be the stabilization that keeps steam ejection portion (prevent produce because of steam is condensing flowing instability phenomenon), still can make steam flow keep lower limit, and begin sequentially to interdict the supply of steam from downstream.
Therefore, the heating steam flow control methods that degasser adopted according to the present invention will be because only therefore supply enough will can prevent the waste of heating steam to water degasification to making dissolved oxygen concentration reach the steam flow of setting value.
Figure 10 illustrates an embodiment of degasser starting method, according to this method, can be significantly less than the feedwater of saturation temperature with heating to a large amount of heating steam of feed-water intake side supply, and carry more a spot of heating steam to the feedwater outlet side.
Degasser is through after the running of certain hour, because dissolved oxygen concentration and temperature all reach stationary value, therefore, when specified running, can outgas by few steam flow rice when starting.Like this, just can significantly reduce the quantity of steam that is used for the feedwater of heated feed water outlet side.
In sum, in the present invention, transported to the feedwater flow of water storing unit in the housing to feeding water out During mouth, be to have formed the heating of stream Lu Laiyu from the ejection of nozzle open-work of crawling along the route of setting Steam contacts, and therefore, the dissolved oxygen concentration of feedwater can be pursued in the various piece on stream road Gradually reduce, and can in the short time, drop to and require below the concentration.
According to the present invention, can keep good degassing performance, do not waste again and add vapours, and Have and greatly shorten the boiler effect of starting time.
Claims (2)
1. degasser, have by a plurality of and be communicated with the steam header and have an ejection mechanism that the nozzle of a plurality of open-works constitutes, each open-work of described nozzle is facing to the water storing unit in the housing, being sprayed onto in the feedwater by open-work by the heating steam that described steam header is introduced described nozzle, it is characterized in that, the feedwater that is sent to described water storing unit arrives in the process of water out, form the stream that crawls along the route of setting, so that contact with heating steam from described nozzle open-work ejection, the described stream that crawls forms by using a plurality of baffle plates, for making feedwater and doing in opposite directions from the steam bubble of the heating steam of said nozzle open-work ejection or parallel mobilely be arranged to above-mentioned each baffle plate parallel with the bearing of trend of said nozzle respectively.
2. degasser as claimed in claim 1, it is characterized in that, each one at the above-mentioned stream that crawls is equipped with in order to the dissolved oxygen concentration of detection feedwater and the oxygen densitometer and the thermometer of temperature, when the degassing, difference between the saturation temperature under feed temperature in detected each zone and this vessel shell pressure of obtaining according to calculating is in feasible value the time, regulates the amount that sprays heating steam from above-mentioned ejection mechanism according to detected dissolved oxygen concentration.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18786793 | 1993-07-29 | ||
| JP187867/93 | 1993-07-29 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1104551A CN1104551A (en) | 1995-07-05 |
| CN1051243C true CN1051243C (en) | 2000-04-12 |
Family
ID=16213610
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN94108765A Expired - Lifetime CN1051243C (en) | 1993-07-29 | 1994-07-29 | Degasifying apparatus |
Country Status (2)
| Country | Link |
|---|---|
| KR (1) | KR0142819B1 (en) |
| CN (1) | CN1051243C (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5645538B2 (en) * | 2010-08-10 | 2014-12-24 | 三菱重工業株式会社 | Deaerator |
| CN102179070B (en) * | 2011-04-12 | 2013-11-20 | 陕西衡伟信息技术有限公司 | Continuous quick debubbling device for monitoring water quality on line |
| GB2526872B (en) * | 2014-06-06 | 2017-01-11 | Cdenviro Ltd | A water treatment system |
| CN104528858B (en) * | 2014-12-23 | 2017-03-08 | 哈尔滨锅炉厂有限责任公司 | Vacuum type oxygen-eliminating device and deoxidation method |
| US10605533B2 (en) * | 2015-09-01 | 2020-03-31 | DOOSAN Heavy Industries Construction Co., LTD | Deaerator |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS56141805A (en) * | 1980-04-05 | 1981-11-05 | Sasakura Eng Co Ltd | Degassing method |
| SU1421363A1 (en) * | 1987-02-17 | 1988-09-07 | Специальное Конструкторско-Технологическое Бюро Института Технической Механики Ан Усср | Method and apparatus for degassing liquids |
| JPH03224602A (en) * | 1990-01-31 | 1991-10-03 | Suido Kiko Kk | Device for adjusting dissolved gas concentration in liquid |
-
1994
- 1994-07-29 CN CN94108765A patent/CN1051243C/en not_active Expired - Lifetime
- 1994-07-29 KR KR1019940018663A patent/KR0142819B1/en not_active IP Right Cessation
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS56141805A (en) * | 1980-04-05 | 1981-11-05 | Sasakura Eng Co Ltd | Degassing method |
| SU1421363A1 (en) * | 1987-02-17 | 1988-09-07 | Специальное Конструкторско-Технологическое Бюро Института Технической Механики Ан Усср | Method and apparatus for degassing liquids |
| JPH03224602A (en) * | 1990-01-31 | 1991-10-03 | Suido Kiko Kk | Device for adjusting dissolved gas concentration in liquid |
Also Published As
| Publication number | Publication date |
|---|---|
| KR950003598A (en) | 1995-02-17 |
| KR0142819B1 (en) | 1998-07-01 |
| CN1104551A (en) | 1995-07-05 |
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Expiration termination date: 20140729 Granted publication date: 20000412 |