CN104606960B - A kind of deflector type demister - Google Patents
A kind of deflector type demister Download PDFInfo
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- CN104606960B CN104606960B CN201310540457.7A CN201310540457A CN104606960B CN 104606960 B CN104606960 B CN 104606960B CN 201310540457 A CN201310540457 A CN 201310540457A CN 104606960 B CN104606960 B CN 104606960B
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- Prior art keywords
- riser
- demister
- outer barrel
- gas
- section
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D45/00—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces
- B01D45/04—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces by utilising inertia
- B01D45/08—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces by utilising inertia by impingement against baffle separators
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D45/00—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces
- B01D45/04—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces by utilising inertia
- B01D45/06—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces by utilising inertia by reversal of direction of flow
Abstract
The invention discloses a kind of deflector type demister, the demister includes several demisting components arranged side by side, and each demisting component includes, and each demisting component includes riser and outer barrel, and outer barrel is arranged on the outside of riser, and with riser on the same axis；Riser is fixed on tower tray, and the top of riser sets capping plate, and some seams are provided with the circumference of riser, has the tangential flow guiding wing the riser close to each bar seam is provided circumferentially about；In some projections of the inner surface setting of outer barrel；Wherein described outer barrel is made up of the direct tube section and bottom conical cylinder section on top.The deflector type demister of the present invention, the separation of drop and gas is realized by baffling of the fluid in flow process.The demister of the present invention is simple in construction, easy for installation, can effectively realize gas-liquid separation, it is adaptable to the gas-liquid separation process in the field such as chemical industry and environmental protection.
Description
Technical field
The present invention relates to a kind of deflector type demister, the gas-liquid separation field belonged in Chemical Engineering, it is adaptable to chemical industry and
Gas-liquid separation process in the fields such as environmental protection.
Background technology
SO2It is the major reason that causes China's atmosphere pollution with dust, is also the atmosphere pollution of the current priority control of China
Thing.At present, wet processing is used mostly in field of Environment Protection, in wet processing flue gas desulfurization course, absorption tower is in running
In, " mist " that particle diameter is 10~60 microns is also easy to produce, not only contains moisture, also dissolved with sulfuric acid, sulfate, SO2Deng to big compression ring
Border is polluted, while causing more serious corrosion to aiutage and heat exchanger etc..Therefore, in wet desulfurizing process, purification
Gas has to demisting before absorption tower is left.
Demister is that the fields such as chemical industry or environmental protection are used for the processing equipment of gas-liquid separation.When the gas containing mist is with certain
Speed by demister when, can and demister internal structure bump against, and depend in its surface.Demister internal structure surface
On mist,, will be inside demister after weight reaches certain level by spreading and the effect of gravity can progressively be assembled
Separated in structure.So as to realize gas-liquid separation.Demister is generally located at the top of absorption tower.When demister is in running
It is middle because of fouling and caused by resistance drop when increasing to predetermined value, it is necessary to start backwashing procedures is rinsed to demister, typically,
It is both needed to set flooding nozzle in demister inlet end and exhaust end.Serious entrainment of the gas phase to liquid phase may now be caused, caused
Gas phase band liquid.
Many types, such as mesh mist eliminator, collapser demister, eddy flow can be divided into according to the purposes of demister, structure
Plate demister, electrostatic precipitator, venetian blind type demister and gravitational settling type demister etc..Conventional has mesh mist eliminator, herringbone
Plate demister, rotational flow plate defroster etc..Although mesh mist eliminator can separate general mist, mist cleaning, air-flow stream are required
Speed is smaller, and resistance drop is big, and usage cycles are short, and equipment investment is big.Current demister typically all uses horizontally disposed, demister gas
Body flow direction is vertical with silk screen, when gas velocity is relatively low, and the mist inertia of entrainment is small, is drifted in gas, it is impossible to collided with silk screen
Contact and be removed, and because the drop that is separated is flowed to gas phase in adverse current, gas is also easy to produce reentrainment to drop, so that
Make the reduction of gas-liquid separation efficiency, and also there is easily blocking, the problems such as pressure drop is big in mesh mist eliminator.Blade type, herringbone
The deflection plate that direction is different, shape is different is installed, to form small runner, increase removes fog effect, knot inside demister
Structure is more complicated, and separating effect is bad.The separated drop of rotational flow plate defroster is identical with gas flow, is also easy to produce reentrainment, drops
Low demisting efficiency, and pressure drop is big, and energy consumption is higher.
The demister element that patent CN200410014713.X is introduced is made up of deflection plate and flue gas flow field adjustment block, deflection plate
It is fixed in flue gas flow field adjustment block, the density and shape of deflection plate change according to the flow area change of flow field parameter everywhere
Become, so that the flow area of air-flow is evenly distributed in absorption tower.Still do not break away from drop descent, gas-liquid counter current
Phenomenon, that is, be also easy to produce reentrainment.The demister that patent CN200920128824.1 is introduced is removed by cooler, thick demister and essence
Day with fog etc. is constituted, and thick demister is corrugated sheet or demisting plate, and smart demister is steel wire, and the demister changes traditional demister
Drop and the shortcoming of airflow direction counter-current flow, improve demisting efficiency, but the demister structure is more complicated, make difficult, and
And as a result of screen net structure, demister pressure drop is larger, also it is easier to block.
The rotational flow plate defroster that patent CN200720038084.3 is introduced is made up of blade, blind plate, cover cylinder and ring flat-plate, should
Demister mainly promotes gas to be rotated using blade, and droplet is subject to centrifugal forces, is thrown toward tower wall, droplet coalescence
Collect, complete gas-liquid separation, but the demister when making gas phase formation centrifugal force, it is necessary to higher gas velocity, so pressure drop is larger,
Energy consumption is higher.
United States Patent (USP) US7618472B2 provides a kind of vane-type demister, and the demister is by corrugated sheet, flat board and blinds
Luffer boards etc. are constituted, and form many cavitys or runner.Gas-liquid mixture enters after demister, and fluid course shifts so that
Fluid flow direction is changed for several times, and velocity variations is very fast, and liquid phase is easy to separate from gas phase.The technology liquid phase
In gas phase separation process, it is possible to achieve gas liquid cross-flow, therefore reentrainment effect of the gas phase to drop is substantially reduced, but should
Technical pattern is extremely complex, and difficulty of processing is also than larger, and corresponding processing and fabricating expense is higher.
The content of the invention
In view of the shortcomings of the prior art, the invention provides a kind of deflector type demister, by fluid in flow process
Multiple baffling realize the separation of drop and gas.The demister of the present invention is simple in construction, and pressure drop is small, easy for installation, Ke Yiyou
Effect realizes gas-liquid separation.
The invention provides a kind of deflector type demister, described demister includes several demisting components arranged side by side, often
Individual demisting component includes riser and outer barrel, and outer barrel is arranged on the outside of riser, and with riser on the same axis；Rise
Tracheae is fixed on tower tray, and the top of riser sets capping plate, some seams is provided with the circumference of riser, close to each bar
The riser of seam is provided circumferentially about the tangential flow guiding wing.
According to the demister of the present invention, wherein the upper edge of described outer barrel is higher than the upper edge of riser, preferably outer barrel is upper
Along the upper edge stitched higher than bar.And the lower edge of outer barrel is apart from tower tray certain distance, while the lower edge that should be stitched less than bar.
In the deflector type demister of the present invention, wherein described outer barrel is made up of direct tube section and conical cylinder section.Outer barrel it is straight
Along the upper edge for being higher than riser in cylinder section, and the conical cylinder section of outer barrel is the upright frustum of a cone, and preferably the upper edge of the frustum of a cone, which is less than, rises
The bar seam lower edge of tracheae.
In the deflector type demister of the present invention, the inner surface of the outer barrel（Inwall）Projection can also be set.Described is convex
The direct tube section and straight tube diameter parallel in outer barrel are played, or can be formed an angle with straight tube axis, projection is in outer barrel conical cylinder section
Part and the bus of the frustum of a cone form an angle.The raised section can be rectangle, triangle, circular arc or circle,
Heretofore described projection is preferred to use the clapper structure of rectangular cross-section.Wherein, the direction of rotation of hyoplastron is preferably with tangentially leading
The direction of rotation for flowing the wing is opposite.
In the deflector type demister of the present invention, the lower ending opening of the outer barrel can also be arranged to zigzag structure, so that
Advantageously dripped in the liquid isolated from the inwall of outer barrel into continuous stream.
The gas of entrained drip enters riser from tower tray lower space, and gas phase is in uphill process, because riser is straight
Footpath is small, and gas velocity is improved, and Vapor Entrainment liquid phase rises, and runs into gas phase flow direction after capping plate and changes（By rising side
To the level that is changed to or level of approximation direction）, and the droplet carried secretly is collided due to effect of inertia and capping plate, and be attached to
Cover on plate, the drop of attachment becomes larger, when the gravity that drop arrives greatly its own generation exceedes the climbing power and liquid of gas
When making a concerted effort of surface tension, drop just is separated from capping plate surface, completes a gas-liquid separation.Not separated
The bar that gas-liquid two-phase is opened up from riser top stitches outflow, under the guide functions of the tangential flow guiding wing, makes gas phase generation again
Change, not removed droplet is acted at tangential flow guiding wing turning and is captured by identical, completes another gas
Liquid is separated.Separated gas-liquid two-phase does not continue to flow yet, because outer tube inner wall is provided with hyoplastron, runs into the tongue on outer tube inner wall
During plate, due to occurring airbond, gas flow direction changes again, and droplet is attached to the turning on the inwall hyoplastron of outer barrel
Place, drop aggregation becomes big, is flowed down along the crack of hyoplastron and barrel, accelerates coalescence, reduces entrainment.Due under outer barrel
Portion is conical cylinder section, and when flowing downward baffling occurs again for the gas phase of entrained drip, and gas phase velocity further slows down, small
Drop is captured again in the direct tube section of outer barrel and the turning of conical cylinder section, and drop aggregation becomes big whereabouts, realizes the efficient of gas-liquid
Separation.
Compared with prior art, deflector type demister of the invention has advantages below：
1st, the less drop of the particle diameter carried secretly in gas can be effectively removed, demisting efficiency is high.The capping on riser top
Plate and the tangential flow guiding wing make the gas phase of entrainment droplet occur baffling, realize gas-liquid separation.
2nd, when setting projection especially sets the hyoplastron of reverse rotation on outer tube inner wall, stitch out from the bar on riser
When gas brushes projection, airbond is met with, can effectively suppress or eliminate the cyclonic action of gas；Meanwhile, brush convex
The speed risen with the gas of outer tube wall crack is greatly reduced, and the drop carried secretly in gas will be separated and be attached to from gas
On inwall, and accelerate coalescence along the raised crack with outer barrel formation, and down dripped along crack into continuous stream, so as to enter one
Step reduces entrainment.
3rd, outer barrel is made up of direct tube section and conical cylinder section, and the gas phase of entrained drip carries the gas velocity of liquid phase secretly when flowing downward
Reduction, and baffling occurs again, droplet is captured again in the direct tube section of outer barrel and the turning of conical cylinder section, and drop gathers
Collection becomes big whereabouts, realizes that gas liquid high-efficiency is separated.
Brief description of the drawings
Fig. 1 is the structural representation of the deflector type demister of the present invention.
Fig. 2 is the deflector type demister riser tangential flow guiding wing of the present invention and the schematic cross-section of outer barrel hyoplastron.
In figure each mark for：1- tower trays；2- riseies；3- outer barrels；The 4- tangential flow guiding wings；5- covers plate；6- is raised（Tongue
Plate）；7- bars are stitched；8- direct tube sections；9- conical cylinder sections.
Embodiment
The deflector type demister of the present invention is described in further detail with reference to the accompanying drawings and examples.
The demister of the present invention includes several demisting components arranged side by side.As depicted in figs. 1 and 2, each demisting component is equal
Including riser 2 and outer barrel 3, outer barrel 3 is arranged on the outside of riser 2, and with riser 2 on the same axis；Riser 2 is consolidated
It is scheduled on tower tray 1, the top of riser sets capping plate 5, and some seams 7 are provided with the circumference of riser, close to each bar seam 7
Riser provided circumferentially about have the tangential flow guiding wing 4.
The size of bar seam 7 is opened up on riser tube wall, can be needed according to actual operating mode or design requirement, by this area
Technical staff is determined.The height h of bar seam 7 typically can be 20~500mm, preferably 200~350mm as described；Bar seam 7
Width L typically can be 20~120mm, preferably 50~80mm.The area that always cracks of described bar seam, typically can be riser
3~5 times of sectional area.7 connected positions, which are stitched, with bar is provided with the tangential flow guiding wing, and the direction of rotation of the tangential flow guiding wing is consistent, tangentially
Flap mainly plays drainage and baffling.The angle [alpha] that tangential flow guiding winglet rises is generally 5 °~45 °, preferably 15 °~30 °.Rise
Tracheae top is provided with capping plate, with riser tube wall airtight connection.
In the baffling demister of the present invention, wherein outer barrel 3 is by the direct tube section 8 on top and two parts institute of conical cylinder section 9 of bottom
Constitute, conical cylinder section is the upright frustum of a cone.The upper end of outer barrel 3 is higher than capping plate 4, and the lower edge of outer barrel 3 is apart from the spacing of tower tray 1 one
From.Outer barrel 3 is arranged on the outside of riser, and coaxial with riser.The upper edge of the conical cylinder section of outer barrel should be less than under bar seam 7
Edge.The lower edge of outer barrel conical cylinder section away from riser bar stitch 7 lower edges vertical range B typically can be 20~260mm, preferably 50~
80mm.The direct tube section diameter N of outer barrel typically can be 1.1 times~1.6 times, preferably 1.1 times~1.2 times of draft tube diameter.Outside
The diameter phi of the conical cylinder section lower ending opening of cylinder typically can be 1.2 times~1.6 times of direct tube section diameter, preferably 1.3 times~1.4
Times.The height H of outer barrel typically can be 1.3 times~2 times that riser bar stitches height.The direct tube section height K of outer barrel is conical cylinder section
1.1~1.3 times of height F.Height C of the conical cylinder section lower edge of outer barrel away from tower tray 1 typically can be 5~100mm, preferably 20~
50mm.The taper angle theta of the conical cylinder section of the outer barrel is 20~120 °, preferably 40~70 °.
As depicted in figs. 1 and 2：In the deflector type demister of the present invention, in the inner surface of outer barrel 3（Inwall）On can also set
Put some raised 6, projection 6 or can form an angle in the direct tube section and diameter parallel of outer barrel 3 with axis, and projection 6 is outside
The conical cylinder section and the frustum of a cone of cylinder 3BusForm an angle, the angle can be 10 °~45 °, preferably 15 °~25 °.Projection 6
Section can be preferably rectangular, i.e., raised preferably hyoplastron in rectangle, triangle or circular arc, the present invention.Such as institute in Fig. 2
Show, projection 6 is hyoplastron.Projection 6 is typically uniformly distributed on the inner surface of outer barrel, and its quantity is that riser bar stitches the 1.5 of quantity
~3 times.Some raised 6 direction of rotation are consistent, it is identical with the direction of rotation of the tangential flow guiding wing 4 or rather, it is preferred to it is tangential
The direction of rotation of flap is opposite.
When its protrusions 6 is hyoplastron, its angle γ tilted can be 5 °~45 °, preferably 10~30 °.
In the deflector type demister of the present invention, the lower ending opening of the outer barrel 3 can also be arranged to zigzag structure, so that
Advantageously dripped in the liquid isolated from the inwall of outer barrel into continuous stream.
During work, the gas of entrained drip enters riser 2 from the lower space of tower tray 1, gas phase in uphill process, due to
Draft tube diameter is small, and gas velocity is improved, and Vapor Entrainment liquid phase rises, and meets gas phase flow direction after capping plate 5 and changes, and
Droplet is collided due to effect of inertia with capping plate 5, and is attached on capping plate, and the drop of attachment becomes larger, drop
The gravity for arriving its own generation greatly exceedes climbing power and when the making a concerted effort of surface tension of liquid of gas, and drop is from capping plate 5 surface
On drop down, complete a gas-liquid separation.The bar that separated gas-liquid two-phase is not opened up from the top of riser 2 stitches outflow,
Under the guide functions of the tangential flow guiding wing 4, gas liquid two-phase flow direction is set to change again, the droplet not being removed exists
The turning of the tangential flow guiding wing 4 and be captured, complete another gas-liquid separator.Separated gas-liquid two-phase does not continue to flow yet
It is dynamic, when running into outer barrel 3, because the inwall of outer barrel 3 is provided with projection（Hyoplastron）, gas phase runs into the projection on the inwall of outer barrel 3（Tongue
Plate）Shi Fasheng airbonds, gas flow direction changes again, and the inwall that droplet is attached to outer barrel 3 is raised（Hyoplastron）On
Turning, drop aggregation becomes big, along projection（Hyoplastron 6）Flowed down with the crack of barrel, accelerate coalescence, reduce entrainment.
Because the bottom of outer barrel 3 is conical cylinder section, when flowing downward baffling, and gas phase velocity occur again for the gas phase of entrained drip
Slow down, droplet is captured again in the direct tube section of outer barrel 3 and the turning of conical cylinder section, drop aggregation becomes big whereabouts, realizes gas
Liquid is separated.
Embodiment
Certain wet scrubber tower purifying smoke 180000Nm3/ h, wherein aobvious water concentration is 10~15g/Nm3, through demisting of the present invention
Show water concentration in final vacuum and be less than 0.5g/Nm3, demisting efficiency is more than 90%.
Claims (15)
1. a kind of deflector type demister, it is characterised in that described demister includes several demisting components arranged side by side, each removes
Mist component includes riser and outer barrel, and outer barrel is arranged on the outside of riser, and with riser on the same axis；Riser
It is fixed on tower tray, the top of riser sets capping plate, some seams is provided with the circumference of riser, what is stitched close to each bar
Riser is provided circumferentially about the tangential flow guiding wing；In some projections of the inner surface setting of outer barrel；Wherein described outer barrel is by top
Direct tube section and bottom conical cylinder section constituted, the upper edge of the direct tube section is higher than the upper edge of riser, the upper edge of the conical cylinder section
The lower edge stitched less than bar.
2. according to the demister described in claim 1, it is characterised in that the described raised direct tube section in outer barrel and straight tube axis
It is parallel, or formed an angle with straight tube axis, projection forms an angle in the part of outer barrel conical cylinder section and the bus of the frustum of a cone.
3. according to the demister described in claim 1 or 2, it is characterised in that the raised rectangular cross-section, triangle, circle
Arc or circle.
4. according to the demister described in claim 3, it is characterised in that the raised rectangular cross-section, i.e. described projection
For clapper structure.
5. according to the demister described in claim 4, it is characterised in that the tilting angle γ of the hyoplastron is 5 °~45 °.
6. according to the demister described in claim 5, it is characterised in that the direction of rotation of described hyoplastron and the tangential flow guiding wing
Direction of rotation is opposite.
7. according to the demister described in claim 1, it is characterised in that the tilting angle [alpha] of the described tangential flow guiding wing is 5 °~
45°。
8. according to the demister described in claim 1, it is characterised in that the lower ending opening of described outer barrel sets toothing knot
Structure.
9. according to the demister described in claim 1, it is characterised in that opened on riser the height h of bar seam for 20~
500mm, the width L of bar seam is 20~120mm.
10. according to the demister described in claim 1, it is characterised in that the gross area of described bar seam is riser sectional area
3~5 times.
11. according to the demister described in claim 1, it is characterised in that described capping plate and riser tube wall airtight connection.
12. according to the demister described in claim 1, it is characterised in that the taper angle theta of the conical cylinder section of the outer barrel is 20~
120°。
13. according to the demister described in claim 1, it is characterised in that the lower end diameter φ of the outer barrel is draft tube diameter
1.1 times~1.6 times.
14. according to the demister described in claim 1, it is characterised in that the height H of the outer barrel is riser bar seam height
1.3 times~2 times.
15. according to the demister described in claim 1, it is characterised in that height C of the lower edge of the outer barrel away from tower tray be 5~
100mm。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310540457.7A CN104606960B (en) | 2013-11-05 | 2013-11-05 | A kind of deflector type demister |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310540457.7A CN104606960B (en) | 2013-11-05 | 2013-11-05 | A kind of deflector type demister |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104606960A CN104606960A (en) | 2015-05-13 |
| CN104606960B true CN104606960B (en) | 2017-10-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310540457.7A Active CN104606960B (en) | 2013-11-05 | 2013-11-05 | A kind of deflector type demister |
Country Status (1)
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2614248A (en) * | 2021-12-22 | 2023-07-05 | Edwards Ltd | Mist trap |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2830910Y (en) * | 2005-04-16 | 2006-10-25 | 李焕昌 | Flue gas purifier of wetting boiler |
| CN201299984Y (en) * | 2008-11-03 | 2009-09-02 | 山东科技大学 | High-speed three-dimensional mass-transfer tower plate with super-large air flow |
| CN203215814U (en) * | 2013-04-23 | 2013-09-25 | 黎广福 | Oil fume filter device for kitchens |
| CN203540219U (en) * | 2013-11-05 | 2014-04-16 | 中国石油化工股份有限公司 | Baffling type demister |
-
2013
- 2013-11-05 CN CN201310540457.7A patent/CN104606960B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2830910Y (en) * | 2005-04-16 | 2006-10-25 | 李焕昌 | Flue gas purifier of wetting boiler |
| CN201299984Y (en) * | 2008-11-03 | 2009-09-02 | 山东科技大学 | High-speed three-dimensional mass-transfer tower plate with super-large air flow |
| CN203215814U (en) * | 2013-04-23 | 2013-09-25 | 黎广福 | Oil fume filter device for kitchens |
| CN203540219U (en) * | 2013-11-05 | 2014-04-16 | 中国石油化工股份有限公司 | Baffling type demister |
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| Publication number | Publication date |
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| CN104606960A (en) | 2015-05-13 |
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