CN102205199B - For running the method for two-phase standpipe in operation at part load - Google Patents
For running the method for two-phase standpipe in operation at part load Download PDFInfo
- Publication number
- CN102205199B CN102205199B CN201110068409.3A CN201110068409A CN102205199B CN 102205199 B CN102205199 B CN 102205199B CN 201110068409 A CN201110068409 A CN 201110068409A CN 102205199 B CN102205199 B CN 102205199B
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- Prior art keywords
- gas
- standpipe
- mixture
- phase
- fluid
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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
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Cleaning In General (AREA)
- Gas Separation By Absorption (AREA)
Abstract
The present invention relates to the method for running two-phase standpipe in operation at part load, particularly relate to for the method by standpipe (5) conveying fluid-gas-mixture, wherein, flow to be conveyed is less than rated flow, and described standpipe (5) designs for described rated flow.In order to support described conveying, gas (conveying gas) (6) is imported in the fluid-gas-mixture standpipe (5) from outside.
Description
Technical field
The present invention relates to the method for being carried fluid-gas-mixture by standpipe, wherein, flow to be conveyed is less than rated flow, and described standpipe designs for 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 and is decomposed at this in this absorption tower, is regenerated by the washing agent loaded in this regenerating unit in absorption tower 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 under gravity in absorption tower, and wherein, it contacts strongly with the gas flow upwards flowed.Described washing agent absorbs some components at this from described process gas, thus the washing agent making to be loaded with the component washed out can to can be used as pure gas at the removed and remaining residue of described process gas of absorption tower lower end removed at tower top place, absorption tower.
Usual regenerating unit comprises tower and container, the washing agent be loaded by described tower and container directed and rise processed at this by stripping, Pressure Drop and/or temperature.Immediately after regeneration, washing agent is fed back to the top on absorption tower, to be reused for washing gas there.In the air-washer of physics, washing agent is directed in closed circuit thus.Usually need to guide washing agent by standpipe at this, to overcome the difference in height between different parts of appliance.
In order to feed back in absorption tower by the washing agent after regeneration, generally adopt pump, and utilize the washing agent that the pressure differential that exists between the container of air-washer and tower and gravity transfer are loaded.Therefore, by supplying the difference in height (described difference in height can only change for the reason of process technology in narrow and small boundary) utilized, the density of medium to be conveyed is less, then the difference in height that can be overcome by standpipe is larger.Therefore prior art is, makes the washing agent that is loaded in the decompression of standpipe pin place, and make a part for the material of dissolving degassed thus and produce the mixture be made up of liquid and gas of two-phase, the density of described mixture is significantly smaller than the density of washing agent.
The standpipe of conveying two-phase mixture is called as two-phase standpipe.Two-phase standpipe designs for following range of operation, and in described range of operation, liquid phase is carried by with rated flow.At operating point place, gas phase exists with the form of minute bubbles, and they distribute in the liquid phase equably to a great extent and they move through standpipe with approximately uniform speed.If only have a part for rated flow available, then flowing velocity in standpipe reduces and described bubble has time enough merges into larger bubble, and described in described larger bubble ratio, liquid phase rises more quickly and finally leaves described liquid phase.What cause described two phases thus goes mixing, and it can carry out to degree like this, makes the density of described two-phase mixture no longer be enough to sedimentation they to be delivered to the upper end of standpipe.In addition, by going mixed process to form disadvantageous flow curve, the latter can cause the vibration in pipeline and thus can cause the damage of standpipe and other parts of appliance.In order to overcome described effect, two-phase standpipe of the prior art is provided with rectifier, such as porous plate, and large gas foam is diminished by described porous plate and makes the mixture homogenising of described two-phase.But rectifier has some shortcomings.Such as they can only design for limited range of operation, will occur mixing outside described limited range of operation.In addition, described rectifier improves the flow resistance of described two-phase standpipe.
Summary of the invention
Therefore task of the present invention is to provide a kind of method starting described type herein, utilizes the method will overcome shortcoming of the prior art.
According to the present invention, proposing of task solves in the following manner, that is, be incorporated into from outside by gas (conveying gas) in the fluid-gas-mixture two-phase standpipe.
By the introducing of described conveying gas, the density of described fluid-gas-mixture reduces.The amount of described conveying gas is determined like this, make described fluid-gas-mixture due in described two-phase standpipe be available for carry pressure differential rise with a speed, this speed suppresses mixed process with being enough to such degree, makes described two-phase standpipe can not excite harmful vibration.
Often kind all can as carrying gas with the gas of the material generation chemical reaction treating to be carried by standpipe.In addition, described gas should have such solubility in the liquid phase under existent condition in described two-phase standpipe, and described solubility is preferably less than the solubility of the gas phase of fluid-gas-mixture to be conveyed.Nitrogen meets this regulation in numerous applications, therefore preferably adopts nitrogen as conveying gas when implementing method of the present invention.Flexible program regulation of the inventive method, to isolate and as carrying gas recirculation to described standpipe from described fluid-gas-mixture at least partially using described gas phase after overcoming described two-phase standpipe.
Meet object to be required of, described conveying gas is introduced in the lower area of described two-phase standpipe, as far as possible effectively can resist mixed process.
Method of the present invention can be applied anywhere, and must be carried by with a flow by two-phase standpipe at described local fluid-gas-mixture, described flow is less than rated flow, and described standpipe designs for described rated flow.Particularly described method can adopt in the air-washer of physics, in described air-washer, the washing agent being loaded with the gas component washed out is transported to another part of appliance from a part of appliance by two-phase standpipe, if described air-washer start time or must with operation at part load due to operation troubles.
In addition the present invention relates to a kind of for carrying the standpipe of fluid-gas-mixture.
Proposing of task solves in the following manner according to the present invention in device, that is, described standpipe has a device, gas (conveying gas) can be imported to the fluid-gas-mixture treating to be carried by standpipe from outside by described device.
Preferably the described device for importing conveying gas is provided with distributor, can conveying gas be imported in fluid-gas-mixture to be conveyed with the form of minute bubbles by described distributor, wherein, the Size Distribution of the minute bubbles of importing is ideally corresponding to the Size Distribution of the minute bubbles existed at described fluid-gas-mixture.
Meet object to be required of, the described distributor that can be configured to nozzle is arranged in the lower area of described standpipe.
Accompanying drawing explanation
The present invention is set forth in more detail below by means of the embodiment schematically shown in Fig. 1.
Fig. 1 illustrates the air-washer run in sub-load mode.
Detailed description of the invention
This embodiment relates to the air-washer run in sub-load mode, there is absorber and by the connected regeneration unit of standpipe, in this absorber, admixture of gas is separated by means of washing agent, in this regeneration unit, the regenerating washing agent loaded in absorber and this obtain gas products.
In order to divided gas flow component, import in the A of absorption tower by pipeline 1 by admixture of gas, described admixture of gas rises and to import with the tower top place on absorption tower and the washing agent 2 guided with adverse current contacts strongly at this in this absorption tower.The washing agent being loaded with the component absorbed from described admixture of gas 1 is taken away at the bottom of the tower of absorption tower A by pipeline 3, and exports the gas flow 4 through purification by tower top.The washing agent 3 be loaded is reduced pressure by throttle mechanism a and is imported in regenerating unit R by standpipe 5.In this standpipe 5 (this standpipe for the conventional operation at air-washer in the detergent amount design of need regeneration that occurs), a part for absorbed component is degassed, thus produces the mixture of two-phase.In order to prevent the mixture of described two-phase go mixing, import in standpipe 5 by pipeline 6 by additional gas, the amount of described additional gas is controlled by control valve b.In described regenerating unit R, absorbed component is isolated again from the described washing agent be loaded, and the washing agent be not loaded can be led back to in the A of absorption tower thus by means of pump P by pipeline 2.By pipeline 7 isolated gas taken out from regenerating unit R and then make it compress in compressor V.A part 8 for compressed gas can be taken away by as product, and remaining part 6 is led back to in described standpipe.
Claims (6)
1. for being carried the method for fluid-gas-mixture by standpipe, wherein, flow to be conveyed is less than rated flow, described standpipe designs for described rated flow, it is characterized in that, gas is imported to as conveying gas from outside in the fluid-gas-mixture described standpipe, wherein, the amount of described conveying gas is determined like this, make described fluid-gas-mixture due in described two-phase standpipe be available for carry pressure differential rise with a speed.
2. method according to claim 1, 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, import in described standpipe using following gas as conveying gas, described gas has the solubility less than its gas phase about the liquid phase of described fluid-gas-mixture.
4. according to the method for claim 1 or 2, it is characterized in that, described fluid-gas-mixture to be conveyed occurs in the air-washer of physics.
5. according to the method for claim 1 or 2, it is characterized in that, nitrogen is imported in described standpipe as conveying gas.
6. method according to claim 4, is characterized in that, is isolated by gas and as conveying gas recirculation and importing in standpipe from described fluid-gas-mixture.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102010011803.6 | 2010-03-18 | ||
| 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 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102205199A CN102205199A (en) | 2011-10-05 |
| CN102205199B true 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 (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2689223B1 (en) * | 1992-03-24 | 1994-05-06 | Air Liquide | METHOD AND INSTALLATION FOR TRANSFERRING FLUID FROM A DISTILLATION COLUMN, ESPECIALLY AIR. |
-
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 (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
|---|
| 用于垂直管道浸取器的空气升液泵性能研究;郑成等;《化学工程》;19890225;第17卷(第01期);61-66 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102205199A (en) | 2011-10-05 |
| DE102010011803A1 (en) | 2011-09-22 |
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