CN203724893U - Straight cylindrical baffling demister - Google Patents
Straight cylindrical baffling demister Download PDFInfo
- Publication number
- CN203724893U CN203724893U CN201320691926.0U CN201320691926U CN203724893U CN 203724893 U CN203724893 U CN 203724893U CN 201320691926 U CN201320691926 U CN 201320691926U CN 203724893 U CN203724893 U CN 203724893U
- Authority
- CN
- China
- Prior art keywords
- demister
- riser
- straight tube
- gas
- lower edge
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 239000007788 liquid Substances 0.000 abstract description 31
- 238000000926 separation method Methods 0.000 abstract description 16
- 238000000034 method Methods 0.000 abstract description 8
- 230000008569 process Effects 0.000 abstract description 7
- 239000000126 substance Substances 0.000 abstract description 3
- 230000000712 assembly Effects 0.000 abstract 1
- 238000000429 assembly Methods 0.000 abstract 1
- 238000007789 sealing Methods 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 41
- 239000012071 phase Substances 0.000 description 17
- 239000003595 mist Substances 0.000 description 10
- 230000000694 effects Effects 0.000 description 9
- 239000007791 liquid phase Substances 0.000 description 5
- 238000010521 absorption reaction Methods 0.000 description 4
- 230000008859 change Effects 0.000 description 4
- 238000004581 coalescence Methods 0.000 description 4
- 238000007514 turning Methods 0.000 description 4
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 3
- 239000003546 flue gas Substances 0.000 description 3
- 230000005484 gravity Effects 0.000 description 3
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- 238000007664 blowing Methods 0.000 description 2
- 230000009194 climbing Effects 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 238000005191 phase separation Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 238000011001 backwashing Methods 0.000 description 1
- 230000001680 brushing effect Effects 0.000 description 1
- 238000003889 chemical engineering Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 208000002925 dental caries Diseases 0.000 description 1
- 238000006477 desulfuration reaction Methods 0.000 description 1
- 230000023556 desulfurization Effects 0.000 description 1
- 230000003009 desulfurizing effect Effects 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 239000012717 electrostatic precipitator Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000010926 purge Methods 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Landscapes
- Separating Particles In Gases By Inertia (AREA)
Abstract
The utility model discloses a straight cylindrical baffling demister. The demister comprises a plurality of demisting assemblies, wherein each demisting assembly comprises a riser and a straight cylinder; the straight cylinder is arranged at the outer side of the riser and is located on the same axis with the riser; the riser is fixed on a column tray, the top of the riser is provided with a sealing cover plate, the circumference of the riser is provided with a plurality of seams, and the circumference close to all the seams of the riser is provided with tangential guide vanes. According to the straight cylindrical baffling demister disclosed by the utility model, the liquid drop and gas separation can be realized through baffling a liquid many times in a flowing process. The demister disclosed by the utility model is simple in structure, convenient to mount, capable of effectively realizing gas-liquid separation, and suitable for a gas-liquid separation process in the fields such as chemical industry, environment friendliness and the like.
Description
Technical field
The present invention relates to a kind of straight tube shape baffling demister, belong to the gas-liquid separation field in Chemical Engineering, be applicable to the gas-liquid separation process in the field 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, mostly adopt wet processing at field of Environment Protection, 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. are 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 field such as chemical industry or environmental protection for gas-liquid separation.In the time that 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.In the time that demister causes resistance drop to increase to predetermined value because of fouling in running, just need to start backwashing procedures demister is rinsed, general, all need to arrange flooding nozzle at demister inlet end and exhaust end.Now may cause gas phase to seriously the carrying secretly of liquid phase, cause gas phase band liquid.
Can be divided into many types according to the purposes of demister, structure, 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 made up 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 is made up 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 stop up than being easier to.
The rotational flow plate defroster that patent CN200720038084.3 introduces is made up 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 in the time making gas phase form centrifugal force, need higher gas speed, so pressure drop is larger, energy consumption is higher.
US Patent No. 7618472B2 provides a kind of vane-type demister, and this demister is made up 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 straight tube shape baffling demister, the repeatedly baffling by fluid in flow process is realized separating 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 straight tube shape deflector type demister, described demister comprises the demist assembly that several are arranged side by side, and each demist assembly includes riser and straight tube, and straight tube 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, has some seams at the circumference of riser, is being provided with the tangential flow guiding wing near on the riser circumference of each seam.
According to demister of the present invention, the upper edge of wherein said straight tube is higher than the upper edge of riser, and the lower edge of straight tube is apart from tower tray certain distance.
In baffling demister of the present invention, on the inner surface of described straight tube, projection can also be set.Described projection is parallel with the axis of straight tube, or can form an angle with axis.The protruding cross section of described setting can be the suitable shape such as rectangle, triangle or circle.It is the clapper structure of rectangle that projection described in the present invention preferably adopts cross section.Wherein, the direction of rotation of hyoplastron is identical or contrary with the direction of rotation of the tangential flow guiding wing.
Wherein, the lower ending opening of described straight tube can also be arranged to zigzag structure, becomes Continuous Flow drippage thereby be more conducive to isolated liquid from the inwall of straight tube.
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, meet after capping plate gas phase flow direction change (changing level or level of approximation direction into by ascent direction), and droplet 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 that drop produces to himself greatly exceedes gas and surface tension of liquid with joint efforts time, drop is just separated envelope lid surface to get off, complete a gas-liquid separation.The line of rabbet joint 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.Not separated gas-liquid two-phase continues to flow, because straight tube inwall is provided with hyoplastron, while running into the hyoplastron on straight tube inwall, owing to there is airbond, gas flow direction changes again, and droplet is attached to the turning on the inwall hyoplastron of straight tube, it is large that drop is assembled change, crack along hyoplastron and barrel flows down, and has accelerated coalescence, has reduced entrainment.Drop is in the time flowing downward, and under the blowing of gas, drop hurtles down, and realizes gas-liquid separation.
Compared with prior art, straight tube shape baffling 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 straight tube inwall, 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 straight 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 straight tube accelerates coalescence, and down become Continuous Flow drippage along crack, thereby further reduce entrainment.
Brief description of the drawings
Fig. 1 is straight tube shape baffling demister structural representation of the present invention.
Fig. 2 is the schematic cross-section of the riser tangential flow guiding wing and straight tube hyoplastron in demister of the present invention.
In figure, be respectively labeled as: 1-tower tray; 2-riser; 3-straight tube; The 4-tangential flow guiding wing; 5-capping plate; 6-projection; 7-bar seam.
Detailed description of the invention
Below in conjunction with drawings and Examples, a kind of demister of the present invention is described in further detail.
As depicted in figs. 1 and 2, demister of the present invention comprises riser 2 and straight tube 3, and straight tube 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, has some seams 7 at the circumference of riser, 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, determined by those skilled in the art.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 deflector type demister of the present invention, wherein the upper end of straight tube 3 is higher than capping plate 4, and the lower edge of straight tube 3 is apart from tower tray 1 certain distance.Straight tube shape 3 is arranged on the outside of riser, and coaxial with riser.7 lower edge should be stitched lower than bar in the lower edge of straight tube.Under straight tube, can be generally 20～260mm, preferably 50～80mm along the vertical range B that stitches 7 times edges apart from riser bar.Straight tube diameter phi can be generally 1.1 times～1.6 times of draft tube diameter, preferably 1.1 times～1.2 times.The height H of straight tube can be generally 1.3 times～2 times of riser bar seam height.Under straight tube, edge can be generally 5～100mm, preferably 20～50mm apart from the height C of tower tray 1.
As depicted in figs. 1 and 2: in deflector type demister of the present invention, projection 6 can also be set on the inner surface (inwall) of straight tube 3, and projection (hyoplastron) 6 is parallel with the axis of straight tube 3, or can form an angle with axis, as as described in 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 in Fig. 2, projection 6 is hyoplastron.Projection 6 is generally uniformly distributed on the inner surface of straight tube, 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 straight tube 3 can also be arranged to zigzag structure, becomes Continuous Flow drippage thereby be more conducive to isolated liquid from the inwall of straight tube.
When 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 line of rabbet joint 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, in the time running into straight tube 3, because straight tube 3 inwalls are provided with projection (hyoplastron), there is airbond while running into the projection (hyoplastron) on straight tube 3 inwalls in gas phase, gas flow direction changes again, and droplet is attached to the turning in the inwall projection (hyoplastron) of straight tube 3, it is large that drop is assembled change, flow down along projection (hyoplastron 6) and the crack of barrel, accelerated coalescence, reduced entrainment.Drop in the time flowing downward,, under the blowing of gas, drop hurtles down, and 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 (21)
1. a straight tube shape baffling 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 straight tube, and straight tube 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, has some seams at the circumference of riser, is being provided with the tangential flow guiding wing near on the riser circumference of each seam; Inner surface in described straight tube is provided with projection, and described projection is parallel with the axis of straight tube, or forms an angle with axis.
2. according to demister claimed in claim 1, it is characterized in that, the upper edge of described straight tube is higher than the upper edge of bar seam, and the lower edge of straight tube is lower than the lower edge of bar seam, and the lower edge of straight tube is apart from tower tray certain distance.
3. according to demister claimed in claim 1, it is characterized in that, the cross section of described projection is rectangle, triangle, circular arc or circle.
4. according to the demister described in claim 1 or 3, it is characterized in that, described projection is hyoplastron.
5. according to demister claimed in claim 4, it is characterized in that, the perk angle γ of described hyoplastron is 5 °～45 °.
6. 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 °.
7. according to demister claimed in claim 4, 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.
8. according to demister claimed in claim 1, it is characterized in that, the lower ending opening of described straight tube is arranged to zigzag structure.
9. 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; The width L of bar seam is 20～120mm.
10. according to demister claimed in claim 1, it is characterized in that, the gross area of the bar seam of offering on riser is 3～5 times of riser sectional area.
11. according to demister claimed in claim 1, it is characterized in that, described capping plate is connected with riser tube wall is airtight.
12. according to demister claimed in claim 2, it is characterized in that, the lower edge of described straight tube is 20～260mm apart from the vertical range B on the lower edge of riser bar seam.
13. according to demister claimed in claim 1, it is characterized in that, the diameter phi of described straight tube is draft tube diameter 1.1 times～1.6 times.
14. according to demister claimed in claim 1, it is characterized in that, the height H of described straight tube is 1.3 times～2 times of riser bar seam height.
15. according to demister claimed in claim 2, it is characterized in that, the lower edge of described straight tube is 5～100mm apart from the height C of tower tray.
16. according to demister claimed in claim 5, it is characterized in that, the perk angle γ of described hyoplastron is 10～30 °.
17. according to demister claimed in claim 6, it is characterized in that, the perk angle [alpha] of the described tangential flow guiding wing is 15 °～30 °.
18. according to demister claimed in claim 9, it is characterized in that, on riser the height h of the bar of opening seam be 200～350mm; The width L of bar seam is 50～80mm.
19. according to the demister described in claim 12, it is characterized in that, the lower edge of described straight tube is 50～80mm apart from the vertical range B on the lower edge of riser bar seam.
20. according to the demister described in claim 13, it is characterized in that, the diameter phi of described straight tube is draft tube diameter 1.1 times～1.2 times.
21. according to the demister described in claim 15, it is characterized in that, the lower edge of described straight tube is 20～50mm apart from the height C of tower tray.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320691926.0U CN203724893U (en) | 2013-11-05 | 2013-11-05 | Straight cylindrical baffling demister |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320691926.0U CN203724893U (en) | 2013-11-05 | 2013-11-05 | Straight cylindrical baffling demister |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203724893U true CN203724893U (en) | 2014-07-23 |
Family
ID=51194995
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320691926.0U Expired - Lifetime CN203724893U (en) | 2013-11-05 | 2013-11-05 | Straight cylindrical baffling demister |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203724893U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104606962A (en) * | 2013-11-05 | 2015-05-13 | 中国石油化工股份有限公司 | Straight cylinder-shaped flow baffling demister |
| CN105797487A (en) * | 2014-12-30 | 2016-07-27 | 浙江大道环保科技有限公司 | Dry type chlorine recovery device for oil refinement from waste plastics |
| CN108499230A (en) * | 2017-02-27 | 2018-09-07 | 中国石油化工股份有限公司 | A kind of efficient rotary type demister |
| CN108499229A (en) * | 2017-02-27 | 2018-09-07 | 中国石油化工股份有限公司 | A kind of rotary type demister |
| CN110694412A (en) * | 2019-11-06 | 2020-01-17 | 苏志远 | Conveniently cleaned mist catcher |
-
2013
- 2013-11-05 CN CN201320691926.0U patent/CN203724893U/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104606962A (en) * | 2013-11-05 | 2015-05-13 | 中国石油化工股份有限公司 | Straight cylinder-shaped flow baffling demister |
| CN104606962B (en) * | 2013-11-05 | 2017-12-19 | 中国石油化工股份有限公司 | Straight tube shape baffling demister |
| CN105797487A (en) * | 2014-12-30 | 2016-07-27 | 浙江大道环保科技有限公司 | Dry type chlorine recovery device for oil refinement from waste plastics |
| CN108499230A (en) * | 2017-02-27 | 2018-09-07 | 中国石油化工股份有限公司 | A kind of efficient rotary type demister |
| CN108499229A (en) * | 2017-02-27 | 2018-09-07 | 中国石油化工股份有限公司 | A kind of rotary type demister |
| CN110694412A (en) * | 2019-11-06 | 2020-01-17 | 苏志远 | Conveniently cleaned mist catcher |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140723 |