CN104606959B - Inverted cone-shaped flow baffling demister - Google Patents
Inverted cone-shaped flow baffling demister Download PDFInfo
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- CN104606959B CN104606959B CN201310540491.4A CN201310540491A CN104606959B CN 104606959 B CN104606959 B CN 104606959B CN 201310540491 A CN201310540491 A CN 201310540491A CN 104606959 B CN104606959 B CN 104606959B
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- demister
- riser
- conical drum
- inversed conical
- gas
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Classifications
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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
- B01D45/06—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces by utilising inertia by reversal of direction of flow
-
- 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
Abstract
The present invention discloses an inverted cone-shaped flow baffling demister, which comprises a plurality of demisting assemblies, wherein each demisting assembly comprises a gas rising pipe and an inverted cone cylinder, the inverted cone cylinder is arranged on the outer side of the gas rising pipe and is at the same axis line as the gas rising pipe, the gas rising pipe is fixed on a tower disk, the top portion of the gas rising pipe is provided with a sealing cover plate, the circumference of the gas rising pipe is provided with a plurality of seams, and the gas rising pipe circumference close to each seam is provided with tangential diversion wings. According to the inverted cone-shaped flow baffling demister, the separation of the liquid droplet and the gas is achieved through the multiple flow baffling during the fluid flowing process; and the inverted cone-shaped flow baffling demister has characteristics of simple structure, easy installation and effective gas-liquid separation achieving, and is suitable for the gas-liquid separation process in the fields of chemical industry, environmental protection, and the like.
Description
Technical field
The present invention relates to a kind of inverted cone baffling demister, belong to the gas-liquid separation field in Chemical Engineering it is adaptable to change
Gas-liquid separation process in the field such as work and environmental protection.
Background technology
so2It is the major reason causing China's atmospheric pollution with dust, be also the atmospheric pollution of the current priority control of China
Thing.At present, mostly adopt wet processing in field of Environment Protection, in wet processing flue gas desulfurization course, absorption tower is in running
In, it is also easy to produce " mist " that particle diameter is 10～60 microns, do not contain only moisture, also dissolved with sulphuric acid, sulfate, so2Deng to big compression ring
Border pollutes, and causes more serious corrosion to aiutage and heat exchanger etc. simultaneously.Therefore, in wet desulfurizing process, purify
Gas had to demisting before leaving absorption tower.
Demister is the processing equipment that the fields such as chemical industry or environmental protection are used for gas-liquid separation.When the gas containing mist is with certain
Speed when passing through demister, can and demister internal structure bump against, and depend in its surface.Demister internal structure surface
On mist, can progressively assemble through diffusion and the effect of gravity, after weight reaches certain level, will be inside demister
Separate in structure.Thus realizing gas-liquid separation.Demister is generally located on absorption top of tower.When demister is in running
Middle cause resistance drop to increase to during predetermined value demister to be rinsed it is necessary to start backwashing procedures because of fouling, typically,
It is both needed to arrange flooding nozzle in demister inlet end and exhaust end.Now gas phase seriously carrying secretly to liquid phase may be led to, lead to
Gas phase band liquid.
Many types can be divided into according to the purposes of demister, structure, such as mesh mist eliminator, collapser demister, eddy flow
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, require mist cleaning, air-flow stream
Speed is less, and resistance drop is big, and usage cycles are short, and equipment investment is big.Demister typically all adopts horizontally disposed, demister gas at present
Body flow direction is vertical with silk screen, and when gas speed is relatively low, the mist inertia carried secretly is little, drifts it is impossible to collide with silk screen in gas
Contact and be removed, and be in adverse current flow direction due to separating drop and gas phase, gas is also easy to produce reentrainment to drop, thus
So that gas-liquid separation efficiency is reduced, and mesh mist eliminator also has easy blocking, the problems such as pressure drop is big.Blade type, herringbone
The deflection plate that direction is different, shape is different is installed inside demister, to form little runner, increases and remove fog effect, knot
Structure is more complicated, and separating effect is bad.It is identical with gas flow that rotational flow plate defroster is separated drop, is also easy to produce reentrainment, fall
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 of deflection plate and shape 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 this demister changes traditional demister
Drop and the shortcoming of airflow direction counter-current flow, improve demisting efficiency, but this demister structure are more complicated, make difficult, and
And due to employing 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 this demister, when making gas phase form centrifugal force, needs higher gas speed, so pressure drop is larger,
Energy consumption is higher.
United States Patent (USP) us7618472b2 provides a kind of vane-type demister, and this demister is by corrugated sheet, flat board and BAIYE
Luffer boards etc. are constituted, and form a lot of cavitys or runner.Gas-liquid mixture enter demister after, fluid course shift 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.This technology liquid phase
By in gas phase separation process, it is possible to achieve gas liquid cross-flow, therefore gas phase substantially reduces to the reentrainment effect of drop, but should
Technical pattern is extremely complex, and also ratio is larger for difficulty of processing, and corresponding processing and fabricating expense is higher.
Content of the invention
For the deficiencies in the prior art, the invention provides a kind of demister, multiple in flow process by fluid
Baffling is realized drop and is separated with gas.The demister structure of the present invention is simple, and pressure drop is little, easy for installation, can effectively realize
Gas-liquid separation.
The invention provides a kind of inverted cone deflector type demister, described demister includes several demisting groups arranged side by side
Part, each demisting assembly all includes riser and inversed conical drum, and inversed conical drum is arranged on the outside of riser, and with riser same
On axis；Riser is fixed on tower tray, the top setting capping plate of riser, has some seams in the circumference of riser,
There is the tangential flow guiding wing the riser stitching near each bar is provided circumferentially about.
According to the demister of the present invention, the upper edge of wherein said inversed conical drum is higher than the upper edge of riser.And inversed conical drum
Lower edge is apart from tower tray certain distance.
In the deflector type demister of the present invention, the inner surface of described inversed conical drum can also arrange projection.Described projection
Parallel with the bus of inversed conical drum, or can form an angle with bus.Described raised section can for rectangle, triangle,
Circular arc or circle.In the present invention, described projection preferably employs the clapper structure of rectangular cross-section.Wherein, the rotation of hyoplastron
Direction is identical with the direction of rotation of the tangential flow guiding wing or rather, it is preferred to adopts contrary direction of rotation.
Wherein, the lower ending opening of described inversed conical drum can also be arranged to zigzag structure, thus advantageously in isolating
Liquid from the inwall of inversed conical drum become continuous stream drip.
In the deflector type demister of the present invention, wherein the inwall in inversed conical drum can also open up groove further, groove
Section can be the suitable shape such as triangle, circular arc or rectangle.Described groove can be arranged with bulge clearance.
The gas of entrained drip from tower tray lower space enter riser, gas phase in uphill process, because riser is straight
Footpath is little, and gas speed is improved, and Vapor Entrainment liquid phase rises, and after meeting capping plate, gas phase flow direction changes (by ascent direction
It is changed to level or level of approximation direction), and droplet is collided due to effect of inertia and capping plate, and it is attached to capping plate
On, the drop of attachment becomes larger, and the gravity that drop arrives greatly its own generation exceedes climbing power and the surface tension of liquid of gas
Make a concerted effort when, drop just from cover plate surface separated, complete a gas-liquid separation.Not by detached gas-liquid two-phase
The line of rabbet joint opening up from riser top flows out, and under the guide functions of the tangential flow guiding wing, so that gas phase is changed again, not by
The droplet removing acts on through identical at tangential flow guiding wing turning and is captured, and completes another gas-liquid separation.Not
Flowing is continued by detached gas-liquid two-phase, because inversed conical drum inwall is provided with hyoplastron, when running into the hyoplastron on inversed conical drum inwall, by
In there is airbond, gas flow direction changes again, and droplet is attached to the turning on the inwall hyoplastron of inversed conical drum, liquid
Drip to assemble and become big, the crack along hyoplastron and barrel flows down, and accelerates coalescence, reduces entrainment.Drop when flowing downward,
Inversed conical drum lower end diameter diminishes, and gas flow rates improve, and blow drop and hurtle down, realize gas-liquid separation.
Compared with prior art, the inverted cone deflector type demister of the present invention has the advantage that
1st, the less drop of the particle diameter carried secretly in gas can effectively be removed, demisting efficiency is high.The capping on riser top
Plate and the tangential flow guiding wing make the gas phase carrying droplet secretly that baffling to occur, and realize gas-liquid separation.
2nd, because the diameter of inversed conical drum lower end diminishes so that the gas speed flowing downward improves, gas phase blows drop, plus
Fast gas-liquid separation process.
The 3rd, the raised especially setting hyoplastron contrary with tangential flow guiding wing direction of rotation is arranged on inversed conical drum inwall, from a liter gas
When the gas that bar on pipe stitches out brushes projection, meet with airbond, can effectively suppress or eliminate the cyclonic action of gas
With；Meanwhile, brush the raised speed with the gas of back taper barrel crack to be greatly reduced, the drop carried secretly in gas will be from gas
In separate and be attached on inwall, and accelerate coalescence along the raised crack being formed with inversed conical drum, and along crack down
Become continuous stream drippage, thus reduce further entrainment.
Brief description
Fig. 1 is a kind of demister structural representation of the present invention.
Fig. 2 is a kind of demister riser tangential flow guiding wing of the present invention and the schematic cross-section of inversed conical drum hyoplastron.
In figure is respectively labeled as: 1- tower tray；2- riser；3- inversed conical drum；The 4- tangential flow guiding wing；5- covers plate；6- is raised；7-
Bar stitches.
Specific embodiment
With reference to the accompanying drawings and examples a kind of demister of the present invention is described in further detail.
The demister of the present invention generally comprises several demisting assemblies arranged side by side.As depicted in figs. 1 and 2, each demisting group
Part all includes riser 2 and inversed conical drum 3, and inversed conical drum 3 is arranged on the outside of riser 2, and with riser 2 on the same axis；
Riser 2 is fixed on tower tray 1, the top setting capping plate 5 of riser, has some seams 7 in the circumference of riser, is leaning on
The riser of closely each bar seam is provided circumferentially about the tangential flow guiding wing 4.
The size of bar seam is opened up on riser tube wall, can be needed or design requirement according to actual operating mode, by this area
Technical staff is determined.Can be 20～500mm, preferably 200～350mm as the height h of described bar seam；The width of bar seam
Degree l can be typically 20～120mm, preferably 50～80mm.The area that always cracks of described bar seam, typically can cut for riser
3～5 times of area.It is provided with the tangential flow guiding wing with bar seam connected position, and the direction of rotation of the tangential flow guiding wing is consistent, tangential flow guiding
The wing acts primarily as drain and baffling effect.Generally 5 °～45 ° of the angle [alpha] that tangential flow guiding winglet rises, preferably 15 °～30 °.Riser
Top is provided with capping plate, with riser tube wall airtight connection.
In the deflector type demister of the present invention, wherein inversed conical drum 3 upper end be higher than capping plate 4, and the lower edge of inversed conical drum 3 away from
With a certain distance from tower tray 1.Inverted cone 3 is arranged on the outside of riser, and coaxial with riser.The taper angle of inversed conical drum is general
θ is 20～120 °, preferably 40～70 °.The lower edge of inversed conical drum should be less than the lower edge of bar seam.Inversed conical drum lower edge is stitched away from riser bar
Vertical dimension b of lower edge can be typically 20～260mm, preferably 50～80mm.Inversed conical drum lower end (opening) diameter phi typically may be used
Think draft tube diameter 1.1 times～1.6 times, preferably 1.1 times～1.2 times.The height h of inversed conical drum can be typically riser bar
1.3 times～2 times of seam height.The height c away from tower tray 1 for the inversed conical drum lower edge can be typically 5～100mm, preferably 20～50mm.
As shown in Figure 2: in the deflector type demister of the present invention, the inner surface (inwall) of inversed conical drum 3 can also to be arranged
Some raised 6.Raised 6 is parallel with the bus of inversed conical drum 3, or can form an angle with bus, as described angle is generally 5
～45 °, preferably 10～30 °.Raised 6 section can be rectangle, triangle or circular arc, preferably rectangular in the present invention, that is,
Raised preferably hyoplastron.As in fig. 2, raised 6 is clapper structure.Raised 6 are typically uniformly distributed on the inner surface of inversed conical drum,
Its quantity stitches 1.5～3 times of quantity for riser bar.Some raised 6 direction of rotation are consistent, the rotation with the tangential flow guiding wing 4
Direction is identical or rather, it is preferred to contrary with the direction of rotation of the tangential flow guiding wing.
Wherein when raised 6 are hyoplastron, the angle γ that it tilts can be 5 °～45 °, preferably 10 °～30 °.
In the deflector type demister of the present invention, the lower ending opening of described inversed conical drum 3 can also be arranged to zigzag structure, from
And advantageously become continuous stream to drip in the liquid isolated from the inwall of inversed conical drum.
During work, the gas of entrained drip enters riser 2 from tower tray 1 lower space, gas phase in uphill process, due to
Draft tube diameter is little, and gas speed is improved, and Vapor Entrainment liquid phase rises, and after meeting capping plate 5, gas phase flow direction changes, and
Droplet is collided with capping plate 5 due to effect of inertia, and is attached on capping plate, and the drop of attachment becomes larger, drop
The big gravity producing to its own 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 line of rabbet joint not opened up from riser 2 top by detached gas-liquid two-phase flows out,
Under the guide functions of the tangential flow guiding wing 4, gas liquid two-phase flow direction is made to change again, the droplet not being removed exists
The tangential flow guiding wing 4 turning and be captured, complete another gas-liquid separator.Yet stream is not continued by detached gas-liquid two-phase
Dynamic, when running into inversed conical drum 3, because inversed conical drum 3 inwall is provided with raised (hyoplastron), gas phase runs into convex on inversed conical drum 3 inwall
Rise and airbond occurs when (hyoplastron), gas flow direction changes again, droplet is attached to the inwall projection (tongue of inversed conical drum 3
Plate) on turning, drop is assembled and is become big, flows down with the crack of barrel along raised (hyoplastron 6), accelerates coalescence, reduce mist
Foam is carried secretly.When flowing downward, inversed conical drum lower end diameter diminishes drop, and gas flow rates improve, and blow drop and hurtle down,
Finally realize gas-liquid separation.
Embodiment
Certain wet scrubber tower purifying smoke 180000nm3/ h, wherein aobvious water concentration is 10～15g/nm3, through demisting of the present invention
Water concentration < 0.5g/nm is shown in device demisting final vacuum3, demisting efficiency > and 90%.
Claims (24)
1. a kind of inverted cone deflector type demister is it is characterised in that described demister includes several demisting assemblies arranged side by side,
Each demisting assembly all includes riser and inversed conical drum, and inversed conical drum is arranged on the outside of riser, and with riser in same axle
On line；Riser is fixed on tower tray, the top setting capping plate of riser, has some seams in the circumference of riser,
The riser of close each bar seam is provided circumferentially about the tangential flow guiding wing；The inwall of described inversed conical drum is provided with projection, described
Raised parallel with the bus of inversed conical drum, or form an angle with bus；The upper edge of described inversed conical drum is higher than the upper edge of riser,
The lower edge of described inversed conical drum is less than the lower edge of bar seam.
2. according to the demister described in claim 1 it is characterised in that described raised rectangular cross-section, triangle, circular arc
Or it is circular.
3. according to the demister described in claim 1 or 2 it is characterised in that described projection is hyoplastron.
4. according to the demister described in claim 3 it is characterised in that the tilting angle γ of described hyoplastron is 5 °～45 °.
5. according to the demister described in claim 1 it is characterised in that the tilting angle [alpha] of the described tangential flow guiding wing be 5 °～
45°.
6. according to the demister described in claim 4 it is characterised in that the direction of rotation of described hyoplastron and the tangential flow guiding wing
Direction of rotation is contrary.
7. according to the demister described in claim 1 it is characterised in that the lower edge of described inversed conical drum is apart from tower tray one spacing
From.
8. according to the demister described in claim 1 it is characterised in that the lower ending opening of described inversed conical drum arranges toothing
Structure.
9. according to the demister described in claim 1 it is characterised in that on riser the height h of opened bar seam be 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 10 it is characterised in that the quantity of the described tangential flow guiding wing be riser bar
1.5～3 times of seam quantity.
12. according to the demister described in claim 1 it is characterised in that described capping plate and riser tube wall airtight connection.
13. according to the demister described in claim 1 it is characterised in that the taper angle theta of described inversed conical drum be 20～
120°.
14. according to the demister described in claim 1 it is characterised in that the lower edge of described inversed conical drum away from riser bar stitch lower edge
Vertical dimension b be 20～260mm.
15. according to the demister described in claim 1 it is characterised in that lower end diameter φ of described inversed conical drum be riser straight
1.1 times of footpath～1.6 times, the height h of described inversed conical drum is 1.3 times～2 times that riser bar stitches height.
16. according to the demister described in claim 7 it is characterised in that the height c away from tower tray for the lower edge of described inversed conical drum be 5
～100mm.
17. according to the demister described in claim 1 it is characterised in that the inwall in inversed conical drum also has a groove, described ditch
Groove is arranged with bulge clearance.
18. according to the demister described in claim 4 it is characterised in that the tilting angle γ of described hyoplastron be 10～30 °.
19. according to the demister described in claim 5 it is characterised in that the tilting angle [alpha] of the described tangential flow guiding wing be 15 °
～30 °.
20. according to the demister described in claim 9 it is characterised in that on riser the height h of opened bar seam be 200～
350mm, the width l of bar seam is 50～80mm.
21. according to the demister described in claim 13 it is characterised in that the taper angle theta of described inversed conical drum be 40～
70°.
22. according to the demister described in claim 14 it is characterised in that the lower edge of described inversed conical drum away from riser bar stitch lower edge
Vertical dimension b be 50～80mm.
23. according to the demister described in claim 15 it is characterised in that lower end diameter φ of described inversed conical drum be riser straight
1.1 times of footpath～1.2 times.
24. according to the demister described in claim 16 it is characterised in that the height c away from tower tray for the lower edge of described inversed conical drum is
20～50mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310540491.4A CN104606959B (en) | 2013-11-05 | 2013-11-05 | Inverted cone-shaped flow baffling demister |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310540491.4A CN104606959B (en) | 2013-11-05 | 2013-11-05 | Inverted cone-shaped flow baffling demister |
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| Publication Number | Publication Date |
|---|---|
| CN104606959A CN104606959A (en) | 2015-05-13 |
| CN104606959B true CN104606959B (en) | 2017-01-18 |
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ID=53141767
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| Application Number | Title | Priority Date | Filing Date |
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| CN201310540491.4A Active CN104606959B (en) | 2013-11-05 | 2013-11-05 | Inverted cone-shaped flow baffling demister |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4331684A1 (en) * | 1993-09-17 | 1995-03-23 | Linde Ag | Apparatus for the phase separation of a gas/liquid stream, if appropriate with previous mixing |
| US6146597A (en) * | 1997-03-14 | 2000-11-14 | Petroleum Energy Center | Separation device |
| EP1681522A2 (en) * | 2003-12-09 | 2006-07-19 | Fujikoki Corporation | Gas liquid separator |
| CN202015519U (en) * | 2011-01-18 | 2011-10-26 | 青岛汇森能源设备有限公司 | Gas-liquid separator |
| CN203724891U (en) * | 2013-11-05 | 2014-07-23 | 中国石油化工股份有限公司 | Inverted conical baffling demister |
-
2013
- 2013-11-05 CN CN201310540491.4A patent/CN104606959B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4331684A1 (en) * | 1993-09-17 | 1995-03-23 | Linde Ag | Apparatus for the phase separation of a gas/liquid stream, if appropriate with previous mixing |
| US6146597A (en) * | 1997-03-14 | 2000-11-14 | Petroleum Energy Center | Separation device |
| EP1681522A2 (en) * | 2003-12-09 | 2006-07-19 | Fujikoki Corporation | Gas liquid separator |
| CN202015519U (en) * | 2011-01-18 | 2011-10-26 | 青岛汇森能源设备有限公司 | Gas-liquid separator |
| CN203724891U (en) * | 2013-11-05 | 2014-07-23 | 中国石油化工股份有限公司 | Inverted conical baffling demister |
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| Publication number | Publication date |
|---|---|
| CN104606959A (en) | 2015-05-13 |
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