CN102205199A - Method for operating two-phase vertial pipe in partial load operating - Google Patents
Method for operating two-phase vertial pipe in partial load operating Download PDFInfo
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- CN102205199A CN102205199A CN2011100684093A CN201110068409A CN102205199A CN 102205199 A CN102205199 A CN 102205199A CN 2011100684093 A CN2011100684093 A CN 2011100684093A CN 201110068409 A CN201110068409 A CN 201110068409A CN 102205199 A CN102205199 A CN 102205199A
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- Prior art keywords
- gas
- standpipe
- liquid
- mixture
- phase
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/14—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by absorption
- B01D53/18—Absorbing units; Liquid distributors therefor
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/14—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by absorption
- B01D53/1425—Regeneration of liquid absorbents
Abstract
The invention relates to a method for operating a two-phase vertial pipe in a partial load operating, especially to the method for transporting the liquid-gas-mixture through a vertical pipe (5), wherein the flow to be transported is small than a stardard flow; the vertical pipe (5) is designed according to the nominal flow. In order to support the transportation, the gas (transportation gas) (6) is guided into the liquid-gas-mixture in the liquid in the vertical pipe from the outside.
Description
Technical field
The present invention relates to be used for carrying by standpipe the method for liquid-gas-mixture, wherein, flow to be carried is less than rated flow, and described standpipe designs at described rated flow.
Background technology
The air-washer of physics generally has absorption tower and regenerating unit, process gas is washed by means of suitable washing agent in this absorption tower and decomposes at this, and the washing agent that will load in the absorption tower in this regenerating unit is regenerated by isolating the component that washes out from described process gas.Washing agent is fed to this absorption tower in the upper area on absorption tower, and process gas to be decomposed imports in the bottom on absorption tower.Washing agent only flows downward in the absorption tower under the effect of gravity, and wherein, it contacts strongly with the gas stream that upwards flows.Described washing agent absorbs some components at this from described process gas, thus make the washing agent be loaded with the component that washes out can be removed in the absorption tower lower end and remaining residue described process gas to can be used as pure gas removed at absorption tower cat head place.
Usually regenerating unit comprises tower and container, and the washing agent that is loaded is by described tower and container is directed and fall by stripping, pressure and/or temperature rises processed at this.Be right after after regeneration, washing agent is fed back the top to the absorption tower, so that be reused for washing gas there.In the air-washer of physics, washing agent is directed in closed circuit thus.Usually need guide washing agent by standpipe at this, so that overcome the difference in height between the different parts of appliance.
For the washing agent after will regenerating feeds back in the absorption tower, generally adopt pump, and the washing agent that utilizes the pressure differential that exists between the container of air-washer and the tower and gravity transfer to be loaded.Therefore, by the difference in height (described difference in height can only change in narrow and small boundary for the reason of process technology) that can supply to utilize, density of medium to be carried is more little, then can be just big more by the difference in height that standpipe overcomes.Therefore prior art is, makes the washing agent that is loaded in the decompression of standpipe pin place, makes the part degassing of dissolved substances thus and produces the mixture of being made up of liquid and gas of two-phase, and the density of described mixture is significantly smaller than the density of washing agent.
Carry the standpipe of two-phase mixture to be called as the two-phase standpipe.The two-phase standpipe designs at following range of operation, and liquid phase is carried with rated flow in described range of operation.At the operating point place, gas phase exists with the form of minute bubbles, and they distribute in liquid phase equably to a great extent and they move through standpipe with approximately uniform speed.If have only the part of rated flow available, then the flowing velocity in the standpipe reduces and described bubble has time enough and merges into bigger bubble, and the described liquid phase of described bigger bubble ratio rises more quickly and finally leaves described liquid phase.Cause the mixing of going of described two phases thus, it carries out to degree like this, makes the density of described two-phase mixture no longer be enough to sedimentation so that they are delivered to the upper end of standpipe.In addition, form disadvantageous flow curve, thereby the latter can cause the vibration in the pipeline and can cause the damage of standpipe and other parts of appliance by going mixed process.In order to overcome described effect, two-phase standpipe of the prior art is provided with rectifier, and porous plate for example, big gas foam diminish by described porous plate and make the mixture homogenising of described two-phase.Yet rectifier has some shortcomings.For example they can only mix occurring outside described limited range of operation at limited range of operation design.In addition, described rectifier has improved the flow resistance of described two-phase standpipe.
Summary of the invention
Therefore task of the present invention is to provide a kind of this paper to start the method for described type, utilizes this method will overcome shortcoming of the prior art.
According to the present invention, being proposed of task solves in the following manner, that is, with gas (conveying gas) from the outside is incorporated into liquid-gas-mixture the two-phase standpipe.
By the introducing of described conveying gas, the density of described liquid-gas-mixture reduces.The amount of described conveying gas is determined like this, make described liquid-gas-mixture owing to the pressure differential that is available for carrying in the described two-phase standpipe rises with a speed, this speed is enough to such degree ground and suppresses to go mixed process, makes described two-phase standpipe can not excite harmful vibration.
Every kind all not can be used as conveying gas with the gas of the material generation chemical reaction for the treatment of to carry by standpipe.In addition, should have such solubility under the condition that described gas exists in liquid phase in described two-phase standpipe, described solubility is preferably less than the solubility of the gas phase of liquid-gas to be carried-mixture.Nitrogen satisfies this regulation in multiple application, therefore preferably adopt nitrogen as carrying gas when implementing method of the present invention.A flexible program regulation of the inventive method is isolated at least a portion of described gas phase and feed back to the described standpipe as conveying gas from described liquid-gas-mixture after overcoming described two-phase standpipe.
What meet the purpose requirement is that described conveying gas is introduced in the lower area of described two-phase standpipe, so that can resist mixed process as far as possible effectively.
Method of the present invention can be used anywhere, must be at described local liquid-gas-mixture by the two-phase standpipe by with a flow volume delivery, and described flow is less than rated flow, and described standpipe designs at described rated flow.Particularly described method can adopt in the air-washer of physics, in described air-washer, the washing agent that is loaded with the gas component that washes out is transported to another part of appliance from a part of appliance by the two-phase standpipe, if described air-washer is when starting or because operation troubles and must be with operation at part load.
The present invention relates to a kind of standpipe that is used to carry liquid-gas-mixture in addition.
Being proposed of task solves in the following manner according to the present invention aspect device, that is, described standpipe has a device, gas (conveying gas) can be imported to liquid-gas-mixture for the treatment of to carry by standpipe from the outside by described device.
Preferred described be used to import carry the device of gas to be provided with distributor, the form of carrying gas with minute bubbles can be imported in liquid-gas to be carried-mixture by described distributor, wherein, the Size Distribution of the minute bubbles of importing is ideally corresponding to the Size Distribution of the minute bubbles that existed at described liquid-gas-mixture.
What meet the purpose requirement is that the described distributor that can be configured to nozzle is arranged in the lower area of described standpipe.
Description of drawings
Set forth the present invention in more detail by means of the embodiment that schematically shows among Fig. 1 below.
Fig. 1 illustrates the air-washer that moves in the sub-load mode.
The specific embodiment
This embodiment relates to the air-washer that moves in the sub-load mode, have absorber and pass through the connected regeneration unit of standpipe, in this absorber, admixture of gas separates by means of washing agent, in this regeneration unit, the regenerating washing agent that in absorber, loads and obtain gas products at this.
For the divided gas flow component, by pipeline 1 admixture of gas is imported among the A of absorption tower, described admixture of gas in this absorption tower, rise and this with import at the cat head place on absorption tower and contact strongly with the washing agent 2 of adverse current guiding.The washing agent that is loaded with the component that absorbs from described admixture of gas 1 is taken away at the bottom of the tower of absorption tower A by pipeline 3, and by the gas stream 4 of cat head output through purifying.The washing agent 3 that is loaded imports among the regenerating unit R by throttle mechanism a decompression and by standpipe 5.In this standpipe 5 (the detergent amount design of the need regeneration that this standpipe occurs at the conventional operation at air-washer), the part degassing of absorbed component, thus produce the mixture of two-phase.For the mixture that prevents described two-phase go mix, by pipeline 6 additional gas is imported in the standpipe 5, the amount of described additional gas is by control valve b control.In described regenerating unit R, absorbed component is isolated from the described washing agent that is loaded again, the washing agent that is not loaded can be led by pipeline 2 by means of pump P thus and get back among the A of absorption tower.Isolated gas is taken out from regenerating unit R and it is compressed in compressor V by pipeline 7.The part 8 of compressed gas can be used as product and take away, and remaining part 6 is led and got back in the described standpipe.
Claims (10)
1. be used for carrying the method for liquid-gas-mixture by standpipe, wherein, flow to be carried is less than rated flow, and described standpipe designs at described rated flow, it is characterized in that, with gas (conveying gas) from the outside imports to liquid-gas-mixture the described standpipe.
2. according to the method for claim 1, it is characterized in that described conveying gas is imported in the lower area of described standpipe.
3. according to the method for claim 1 or 2, it is characterized in that as carrying gas to import in the described standpipe, described gas has the solubility littler than its gas phase about the liquid phase of described liquid-gas-mixture with following gas.
4. according to the method for one of claim 1 to 3, it is characterized in that described liquid-gas-mixture to be carried occurs in the air-washer of physics.
5. according to the method for one of claim 1 to 4, it is characterized in that, nitrogen is imported in the described standpipe as conveying gas.
6. according to the method for claim 4, it is characterized in that, gas is isolated from described liquid-gas-mixture and fed back and import in the standpipe as conveying gas.
7. be used to carry the standpipe of liquid-gas-mixture, it is characterized in that, this standpipe has a device, gas (conveying gas) can be imported to liquid-gas-mixture for the treatment of to carry by this standpipe from the outside by this device.
8. according to the standpipe of claim 7, it is characterized in that this standpipe has distributor, the form of described conveying gas with minute bubbles can be imported in liquid-gas to be carried-mixture by described distributor.
9. standpipe according to Claim 8 is characterized in that, described distributor is configured to nozzle.
10. according to the standpipe of one of claim 7 to 9, it is characterized in that, be used for importing the lower area that the described device of carrying gas is arranged on described standpipe.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE201010011803 DE102010011803A1 (en) | 2010-03-18 | 2010-03-18 | Method for conveying liquid-gas-mixture through rising pipe, involves inserting gas, particularly carrier gas, from outside in liquid-gas-mixture in rising pipe |
| DE102010011803.6 | 2010-03-18 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102205199A true CN102205199A (en) | 2011-10-05 |
| CN102205199B CN102205199B (en) | 2016-04-20 |
Family
ID=44585278
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110068409.3A Active CN102205199B (en) | 2010-03-18 | 2011-03-18 | For running the method for two-phase standpipe in operation at part load |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN102205199B (en) |
| DE (1) | DE102010011803A1 (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1076775A (en) * | 1992-03-24 | 1993-09-29 | 乔治·克劳德方法的研究开发空气股份有限公司 | Liquid transfer method and equipment |
| CN1258561A (en) * | 1999-12-30 | 2000-07-05 | 清华大学 | Circular tri-phase gas-liquid-solid reactor |
| CN101185838A (en) * | 2007-08-24 | 2008-05-28 | 中国石油化工集团公司 | Regeneratable wet fuel gas desulfurizing technology |
| CN101417202A (en) * | 2007-10-25 | 2009-04-29 | 林德股份公司 | The gas-washing method of physics and device |
-
2010
- 2010-03-18 DE DE201010011803 patent/DE102010011803A1/en not_active Ceased
-
2011
- 2011-03-18 CN CN201110068409.3A patent/CN102205199B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1076775A (en) * | 1992-03-24 | 1993-09-29 | 乔治·克劳德方法的研究开发空气股份有限公司 | Liquid transfer method and equipment |
| CN1258561A (en) * | 1999-12-30 | 2000-07-05 | 清华大学 | Circular tri-phase gas-liquid-solid reactor |
| CN101185838A (en) * | 2007-08-24 | 2008-05-28 | 中国石油化工集团公司 | Regeneratable wet fuel gas desulfurizing technology |
| CN101417202A (en) * | 2007-10-25 | 2009-04-29 | 林德股份公司 | The gas-washing method of physics and device |
Non-Patent Citations (1)
| Title |
|---|
| 郑成等: "用于垂直管道浸取器的空气升液泵性能研究", 《化学工程》, vol. 17, no. 01, 25 February 1989 (1989-02-25), pages 61 - 66 * |
Also Published As
| Publication number | Publication date |
|---|---|
| DE102010011803A1 (en) | 2011-09-22 |
| CN102205199B (en) | 2016-04-20 |
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