CN203540219U - Baffling type demister - Google Patents
Baffling type demister Download PDFInfo
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- CN203540219U CN203540219U CN201320691870.9U CN201320691870U CN203540219U CN 203540219 U CN203540219 U CN 203540219U CN 201320691870 U CN201320691870 U CN 201320691870U CN 203540219 U CN203540219 U CN 203540219U
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- demister
- riser
- urceolus
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Abstract
The utility model discloses a baffling type demister. The demister comprises a plurality of parallel demisting components, wherein each demisting component comprises a riser and an outer barrel; the outer barrel is arranged outside the riser and is positioned on the same axis as the riser; the riser is fixed on a tower tray; a seal cover board is arranged at the top of the riser; a plurality of slots are formed in the circumference of the riser; tangential turning vanes are arranged on the circumference of the riser, close to each slot; a plurality of bulges are arranged on the inner surface of the outer barrel; the outer barrel is formed by an upper straight barrel section and a lower tapered barrel section. The baffling type demister has the advantages that separation of liquid drops from gases is achieved through baffling of fluid in the flow process; the demister has a simple structure, is convenient to install, can effectively achieve gas-liquid separation, and is suitable for the gas-liquid separation processes in the fields of chemical industry, environmental protection and the like.
Description
Technical field
The present invention relates to a kind of deflector type demister, belong to the gas-liquid separation field in Chemical Engineering, be applicable to the gas-liquid separation process in the fields such as chemical industry and environmental protection.
Background technology
SO
2with dust be the major reason that causes China's atmosphere pollution, the atmosphere pollution of the current priority control of Ye Shi China.At present, at field of Environment Protection, mostly adopt wet processing, in wet processing flue gas desulfurization course, absorption tower, in running, easily produces particle diameter and is " mist " of 10～60 microns, not only contains moisture, is also dissolved with sulfuric acid, sulfate, SO
2deng, atmospheric environment is polluted, aiutage and heat exchanger etc. is caused to more serious corrosion simultaneously.Therefore,, in wet desulfurizing process, Purge gas must demist before leaving absorption tower.
Demister is the treatment facility of the fields such as chemical industry or environmental protection for gas-liquid separation.When the gas that contains mist passes through demister with certain speed, meeting and demister internal structure bump against, and depend in its surface.The lip-deep mist of demister internal structure, progressively assembles through the effect meeting of diffusion and gravity, when weight reaches after certain level, will separate from demister internal structure.Thereby realize gas-liquid separation.Demister operated by rotary motion is at top, absorption tower.When demister causes resistance drop to increase to predetermined value because of fouling in running, just need to start backwashing procedures demister is rinsed, general, at demister inlet end and exhaust end, all need to arrange flooding nozzle.Now may cause gas phase to seriously the carrying secretly of liquid phase, cause gas phase band liquid.
According to the purposes of demister, structure, can be divided into many types, as mesh mist eliminator, collapser demister, rotational flow plate defroster, electrostatic precipitator, venetian blind type demister and gravitational settling type demister etc.Conventional have mesh mist eliminator, collapser demister, a rotational flow plate defroster etc.Although mesh mist eliminator can separate general mist, require that mist is clean, air-flow velocity is less, and resistance drop is large, life cycle is short, and equipment investment is large.Demister generally all adopts horizontally disposed at present, demister gas flow direction is vertical with silk screen, when gas speed is lower, the mist inertia of carrying secretly is little, in gas, drifts, can not contact and be removed with silk screen collision, and flow to because separated drop and gas phase are adverse current, gas easily produces reentrainment to drop, thereby makes gas-liquid separation Efficiency Decreasing, and the problems such as mesh mist eliminator also exists easy obstruction, and Pressure Drop is large.Blade type, herringbone demister inside are provided with the deflection plate that direction is different, shape is different, to form little runner, increase except fog effect, and structure is more complicated, and separating effect is bad.The separated drop of rotational flow plate defroster is identical with gas flow, easily produces reentrainment, reduce demist efficiency, and pressure drop is large, and energy consumption is higher.
The demister element that patent CN200410014713.X introduces is comprised of deflection plate and flue gas flow field adjustment block, deflection plate is fixed in flue gas flow field adjustment block, the variation of flow field parameter everywhere changes according to flow area for the density of deflection plate and shape, thereby the flow area of air-flow in absorption tower is evenly distributed.Still do not break away from drop landing process, gas-liquid counter current phenomenon, easily produces reentrainment.The demister that patent CN200920128824.1 introduces consists of cooler, thick demister and smart demister etc., thick demister is corrugated sheet or demist plate, essence demister is steel wire, this demister has changed the shortcoming of traditional demister drop and airflow direction counter-current flow, has improved demist efficiency, but this demister structure is more complicated, make difficulty, and owing to having adopted screen net structure, demister pressure drop is larger, also than being easier to, stop up.
The rotational flow plate defroster that patent CN200720038084.3 introduces is consisted of blade, blind plate, cover cylinder and ring flat-plate, this demister mainly utilizes blade to promote gas and is rotated, droplet is subject to the effect of centrifugal force, be thrown toward tower wall, droplet coalescence is collected, and completes gas-liquid separation, but this demister is when making gas phase form centrifugal force, need higher gas speed, so pressure drop is larger, energy consumption is higher.
U.S. Pat 7618472B2 provides a kind of vane-type demister, and this demister consists of corrugated sheet, flat board and louver board etc., and forms a lot of cavitys or runner.Gas-liquid mixture enters after demister, and fluid course is offset, and makes direction of flow be able to change for several times, and velocity variations is very fast, and liquid phase is easy to from gas phase separation out.This technology liquid phase, by gas phase separation process, can realize gas liquid cross-flow, and therefore gas phase reduces greatly to the reentrainment effect of drop, but this technical pattern is very complicated, and difficulty of processing is also larger, and corresponding processing and fabricating expense is higher.
Summary of the invention
For the deficiencies in the prior art, the invention provides a kind of deflector type demister, the repeatedly baffling by fluid in flow process is realized the separation of drop and gas.Demister of the present invention is simple in structure, and pressure drop is little, easy for installation, can effectively realize gas-liquid separation.
The invention provides a kind of deflector type demister, described demister comprises the demist assembly that several are arranged side by side, and each demist assembly includes riser and urceolus, and urceolus is arranged on the outside of riser, and with riser on same axis; Riser is fixed on tower tray, and the top of riser arranges capping plate, at the circumference of riser, has some seams, near on the riser circumference of each seam, is being provided with the tangential flow guiding wing.
According to demister of the present invention, the upper edge of wherein said urceolus is higher than the upper edge of riser, and preferably the upper edge of urceolus is higher than the upper edge of bar seam.And the lower edge of urceolus is apart from tower tray certain distance, simultaneously should be lower than the lower edge of bar seam.
In deflector type demister of the present invention, wherein said urceolus is consisted of direct tube section and conical cylinder section.On the direct tube section of urceolus, along higher than the upper edge of riser, and the conical cylinder section of urceolus is the upright frustum of a cone, and preferably the upper edge of the frustum of a cone is lower than the lower edge of bar seam of riser.
In deflector type demister of the present invention, the inner surface (inwall) of described urceolus can also arrange projection.Described projection is parallel with straight tube axis at the direct tube section of urceolus, or can form an angle with straight tube axis, and projection forms an angle in the part of urceolus conical cylinder section and the bus of the frustum of a cone.The cross section of described projection can be rectangle, triangle, circular arc or circle, and it is the clapper structure of rectangle that the projection described in the present invention preferably adopts cross section.Wherein, the direction of rotation of hyoplastron should be contrary with the direction of rotation of the tangential flow guiding wing.
In deflector type demister of the present invention, the lower ending opening of described urceolus can also be arranged to zigzag structure, thereby be more conducive to isolated liquid, from the inwall of urceolus, becomes Continuous Flow drippage.
The gas of entrained drip enters riser from tower tray lower space, gas phase is in uphill process, because draft tube diameter is little, gas speed is improved, Vapor Entrainment liquid phase rises, run into after capping plate gas phase flow direction change (changing level or level of approximation direction into by ascent direction), and the droplet of carrying secretly is because effect of inertia and capping plate bump, and be attached on capping plate, it is large that the drop adhering to becomes gradually, the climbing power that the gravity producing to himself greatly when drop exceedes gas and surface tension of liquid with joint efforts time, drop is just separated envelope lid surface to get off, completed a gas-liquid separation.The bar seam that not separated gas-liquid two-phase is offered from riser top flows out, under the guide functions of the tangential flow guiding wing, gas phase is changed again, and not removed droplet is captured through identical effect at tangential flow guiding wing turning, completes another gas-liquid separation.Separated gas-liquid two-phase continues to flow not yet, because outer tube inner wall is provided with hyoplastron, while running into the hyoplastron on outer tube inner wall, owing to there is airbond, gas flow direction changes again, and droplet is attached to the turning on the inwall hyoplastron of urceolus, it is large that drop is assembled change, crack along hyoplastron and barrel flows down, and has accelerated coalescence, has reduced entrainment.Because the bottom of urceolus is conical cylinder section, when flowing downward, there is baffling in the gas phase of entrained drip again, and gas phase velocity further slows down, droplet is captured again at the direct tube section of urceolus and the turning of conical cylinder section, and drop is assembled the large whereabouts of change, realizes the efficient separation of gas-liquid.
Compared with prior art, deflector type demister of the present invention has the following advantages:
1, can effectively remove the less drop of particle diameter of carrying secretly in gas, demist efficiency is high.The capping plate on riser top and the tangential flow guiding wing make to carry secretly the gas phase generation baffling of droplet, realize gas-liquid separation.
2, projection is set when the hyoplastron of reverse rotation is especially set on outer tube inner wall, when the gas that the bar from riser stitches out brushes projection, meets with airbond, can effectively suppress or eliminate the cyclonic action of gas; Simultaneously, brushing projection significantly reduces with the speed of the gas of outer tube wall crack, the drop of carrying secretly in gas will be separated and be attached on inwall from gas, and the crack forming along projection and urceolus accelerates coalescence, and down become Continuous Flow drippage along crack, thereby further reduced entrainment.
3, urceolus consists of direct tube section and conical cylinder section, and the gas phase of entrained drip is when flowing downward, and the gas prompt drop of carrying liquid phase secretly is low, and there is again baffling, droplet is captured again at the direct tube section of urceolus and the turning of conical cylinder section, and drop is assembled the large whereabouts of change, realizes gas liquid high-efficiency and separates.
Accompanying drawing explanation
Fig. 1 is the structural representation of deflector type demister of the present invention.
Fig. 2 is the schematic cross-section of the deflector type demister riser tangential flow guiding wing of the present invention and urceolus hyoplastron.
In figure, be respectively labeled as: 1-tower tray; 2-riser; 3-urceolus; The 4-tangential flow guiding wing; 5-capping plate; 6-projection (hyoplastron); 7-bar seam; 8-direct tube section; 9-conical cylinder section.
The specific embodiment
Below in conjunction with drawings and Examples, deflector type demister of the present invention is described in further detail.
Demister of the present invention comprises the demist assembly that several are arranged side by side.As depicted in figs. 1 and 2, each demist assembly includes riser 2 and urceolus 3, and urceolus 3 is arranged on the outside of riser 2, and with riser 2 on same axis; Riser 2 is fixed on tower tray 1, and the top of riser arranges capping plate 5, at the circumference of riser, has some seams 7, on the riser circumference near each seam 7, is provided with the tangential flow guiding wing 4.
On riser tube wall, offer the size of bar seam 7, can need or design requirement according to actual operating mode, by those skilled in the art, determined.As described in can be 20～500mm, preferably 200～350mm the height h of bar seam 7; The width L of bar seam 7 can be generally 20～120mm, preferably 50～80mm.The area that always cracks of described bar seam can be generally 3～5 times of riser sectional area.The position that is connected with bar seam 7 is provided with the tangential flow guiding wing, and the direction of rotation of the tangential flow guiding wing is consistent, and the tangential flow guiding wing mainly plays drainage and baffling effect.The angle [alpha] of tangential flow guiding wing perk is generally 5 °～45 °, preferably 15 °～30 °.Riser top is provided with capping plate, is connected with riser tube wall is airtight.
In baffling demister of the present invention, wherein urceolus 3 is consisted of the direct tube section 8 on top and conical cylinder section 9 two parts of bottom, and conical cylinder section is the upright frustum of a cone.The upper end of urceolus 3 is higher than capping plate 4, and the lower edge of urceolus 3 is apart from tower tray 1 certain distance.Urceolus 3 is arranged on the outside of riser, and coaxial with riser.7 lower edge should be stitched lower than bar in the upper edge of the conical cylinder section of urceolus.The lower edge of urceolus conical cylinder section can be generally 20～260mm, preferably 50～80mm apart from the vertical range B on 7 times edges of riser bar seam.The direct tube section diameter N of urceolus can be generally 1.1 times～1.6 times of draft tube diameter, preferably 1.1 times～1.2 times.The diameter phi of the conical cylinder section lower ending opening of urceolus can be generally 1.2 times～1.6 times of direct tube section diameter, preferably 1.3 times～1.4 times.The height H of urceolus can be generally 1.3 times～2 times of riser bar seam height.The direct tube section height K of urceolus is 1.1～1.3 times of conical cylinder section height F.Under the conical cylinder section of urceolus, edge can be generally 5～100mm, preferably 20～50mm apart from the height C of tower tray 1.The taper angle theta of the conical cylinder section of described urceolus is 20～120 °, preferably 40～70 °.
As depicted in figs. 1 and 2: in deflector type demister of the present invention, on the inner surface (inwall) of urceolus 3, can also arrange some protruding 6, projection 6 direct tube sections at urceolus 3 are parallel with axis, or can form an angle with axis, projection 6 conical cylinder sections at urceolus 3 and the frustum of a cone
busform an angle, described angle can be 10 °～45 °, preferably 15 °～25 °.The cross section of projection 6 can be rectangle, triangle or circular arc, is preferably rectangle in the present invention, and projection is preferably hyoplastron.As shown in Figure 2, projection 6 is hyoplastron.Projection 6 is generally uniformly distributed on the inner surface of urceolus, and its quantity is 1.5～3 times of riser bar seam quantity.Some direction of rotation of protruding 6 are consistent, identical or contrary with the direction of rotation of the tangential flow guiding wing 4, preferably contrary with the direction of rotation of the tangential flow guiding wing.
When its protrusions 6 is hyoplastron, the angle γ of its perk can be 5 °～45 °, preferably 10～30 °.
In deflector type demister of the present invention, the lower ending opening of described urceolus 3 can also be arranged to zigzag structure, thereby be more conducive to isolated liquid, from the inwall of urceolus, becomes Continuous Flow drippage.
During work, the gas of entrained drip enters riser 2 from tower tray 1 lower space, gas phase is in uphill process, because draft tube diameter is little, gas speed is improved, Vapor Entrainment liquid phase rises, meeting capping plate 5 rear gas phase flow directions changes, and droplet is because effect of inertia and capping plate 5 bump, and be attached on capping plate, the drop adhering to becomes greatly gradually, the climbing power that the gravity that drop produces to himself greatly exceedes gas and surface tension of liquid with joint efforts time, drop drips from capping plate 5 surfaces, has completed a gas-liquid separation.The bar seam that not separated gas-liquid two-phase is offered from riser 2 tops flows out, under the guide functions of the tangential flow guiding wing 4, the mobile direction of gas-liquid two-phase is changed again, and the droplet not being removed is captured at the tangential flow guiding wing 4 turnings, completes another gas-liquid separator.Separated gas-liquid two-phase continues to flow not yet, when running into urceolus 3, because urceolus 3 inwalls are provided with projection (hyoplastron), there is airbond while running into the projection (hyoplastron) on urceolus 3 inwalls in gas phase, gas flow direction changes again, and droplet is attached to the turning in the inwall projection (hyoplastron) of urceolus 3, it is large that drop is assembled change, along projection (hyoplastron 6) and the crack of barrel, flow down, accelerated coalescence, reduced entrainment.Because the bottom of urceolus 3 is conical cylinder section, when flowing downward, there is again baffling in the gas phase of entrained drip, and gas phase velocity slows down, droplet is captured again at the direct tube section of urceolus 3 and the turning of conical cylinder section, and drop is assembled the large whereabouts of change, realizes gas-liquid separation.
Embodiment
Certain wet scrubber tower purifying smoke 180000Nm
3/ h, wherein aobvious water concentration is 10～15g/Nm
3, in demist final vacuum of the present invention, aobvious water concentration is less than 0.5g/Nm
3, demist efficiency is greater than 90%.
Claims (17)
1. a deflector type demister, is characterized in that, described demister comprises the demist assembly that several are arranged side by side, and each demist assembly includes riser and urceolus, and urceolus is arranged on the outside of riser, and with riser on same axis; Riser is fixed on tower tray, and the top of riser arranges capping plate, at the circumference of riser, has some seams, near on the riser circumference of each seam, is being provided with the tangential flow guiding wing; At the inner surface of urceolus, some projections are set; Wherein said urceolus is consisted of direct tube section and the bottom conical cylinder section on top.
2. according to right, want it ask the demister described in 1, it is characterized in that, on the direct tube section of described urceolus along higher than the upper edge of riser, and under urceolus along apart from tower tray certain distance.
3. according to demister claimed in claim 2, it is characterized in that, the upper edge of described urceolus conical cylinder section is lower than the lower edge of bar seam.
4. according to demister claimed in claim 1, it is characterized in that, described projection is parallel with straight tube axis at the direct tube section of urceolus, or forms an angle with straight tube axis, and projection forms an angle in the part of urceolus conical cylinder section and the bus of the frustum of a cone.
5. according to the demister described in claim 1 or 4, it is characterized in that, the cross section of described projection is rectangle, triangle, circular arc or circle.
6. according to demister claimed in claim 5, it is characterized in that, the cross section of described projection is rectangle, and described projection is clapper structure.
7. according to demister claimed in claim 6, it is characterized in that, the perk angle γ of described hyoplastron is 5 °～45 °, preferably 10～30 °.
8. according to demister claimed in claim 7, it is characterized in that, the direction of rotation of described hyoplastron is contrary with the direction of rotation of the tangential flow guiding wing.
9. according to demister claimed in claim 1, it is characterized in that, the perk angle [alpha] of the described tangential flow guiding wing is 5 °～45 °, preferably 15 °～30 °.
10. according to demister claimed in claim 1, it is characterized in that, the lower ending opening of described urceolus is arranged to zigzag structure.
11. according to demister claimed in claim 1, it is characterized in that, on riser the height h of the bar of opening seam be 20～500mm, preferably 200～350mm; The width L of bar seam is 20～120mm, preferably 50～80mm.
12. according to demister claimed in claim 1, it is characterized in that, the gross area of described bar seam is 3～5 times of riser sectional area.
13. according to demister claimed in claim 1, it is characterized in that, described capping plate is connected with riser tube wall is airtight.
14. according to demister claimed in claim 1, it is characterized in that, the taper angle theta of the conical cylinder section of described urceolus is 20～120 °, preferably 40～70 °.
15. according to the demister described in claim 15, it is characterized in that, the lower end diameter φ of described urceolus is draft tube diameter 1.1 times～1.6 times, preferably 1.1 times～1.2 times.
16. according to demister claimed in claim 1, it is characterized in that, the height H of described urceolus is 1.3 times～2 times of riser bar seam height.
17. according to demister claimed in claim 7, it is characterized in that, the lower edge of described urceolus is 5～100mm, preferably 20～50mm apart from the height C of tower tray.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320691870.9U CN203540219U (en) | 2013-11-05 | 2013-11-05 | Baffling type demister |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320691870.9U CN203540219U (en) | 2013-11-05 | 2013-11-05 | Baffling type demister |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203540219U true CN203540219U (en) | 2014-04-16 |
Family
ID=50458389
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320691870.9U Expired - Lifetime CN203540219U (en) | 2013-11-05 | 2013-11-05 | Baffling type demister |
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| Country | Link |
|---|---|
| CN (1) | CN203540219U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104606960A (en) * | 2013-11-05 | 2015-05-13 | 中国石油化工股份有限公司 | Flow baffling type demister |
-
2013
- 2013-11-05 CN CN201320691870.9U patent/CN203540219U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104606960A (en) * | 2013-11-05 | 2015-05-13 | 中国石油化工股份有限公司 | Flow baffling type demister |
| CN104606960B (en) * | 2013-11-05 | 2017-10-03 | 中国石油化工股份有限公司 | A kind of deflector type demister |
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|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140416 |
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| CX01 | Expiry of patent term |