CN108499230A - A kind of efficient rotary type demister - Google Patents
A kind of efficient rotary type demister Download PDFInfo
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- CN108499230A CN108499230A CN201710109525.2A CN201710109525A CN108499230A CN 108499230 A CN108499230 A CN 108499230A CN 201710109525 A CN201710109525 A CN 201710109525A CN 108499230 A CN108499230 A CN 108499230A
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- Prior art keywords
- riser
- demister
- rectification channel
- rectification
- outer barrel
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- 238000000034 method Methods 0.000 claims abstract description 9
- 230000008569 process Effects 0.000 claims abstract description 9
- 238000010521 absorption reaction Methods 0.000 claims description 5
- 230000003009 desulfurizing effect Effects 0.000 claims description 4
- 239000007788 liquid Substances 0.000 abstract description 17
- 230000000694 effects Effects 0.000 abstract description 16
- 238000000926 separation method Methods 0.000 abstract description 14
- 239000012530 fluid Substances 0.000 abstract description 6
- 230000001133 acceleration Effects 0.000 abstract description 3
- 238000009434 installation Methods 0.000 abstract description 2
- 239000007789 gas Substances 0.000 description 62
- 239000003595 mist Substances 0.000 description 8
- 239000012071 phase Substances 0.000 description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 5
- 230000008859 change Effects 0.000 description 5
- 239000003546 flue gas Substances 0.000 description 5
- 235000013339 cereals Nutrition 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 239000007791 liquid phase Substances 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 239000000779 smoke Substances 0.000 description 2
- 240000007594 Oryza sativa Species 0.000 description 1
- 235000007164 Oryza sativa Nutrition 0.000 description 1
- 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
- 238000003916 acid precipitation Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 238000004220 aggregation Methods 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000009194 climbing Effects 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 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
- 238000009826 distribution Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 235000009566 rice Nutrition 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 230000007480 spreading Effects 0.000 description 1
- 238000003892 spreading Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Classifications
-
- 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
-
- 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
- B01D45/12—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces by centrifugal forces
- B01D45/16—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces by centrifugal forces generated by the winding course of the gas stream, the centrifugal forces being generated solely or partly by mechanical means, e.g. fixed swirl vanes
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Separating Particles In Gases By Inertia (AREA)
- Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
Abstract
The invention discloses a kind of efficient rotary type demisters.The demister includes several demisting components, each demisting component includes riser and outer barrel, outer barrel is arranged in the outside of riser, and on the same axis with riser, and helical fin is arranged in outer tube inner surface, riser is divide into upper part and lower part in an axial direction, top is divided into riser I, and lower part is divided into riser II, riser I and riser II and is connect by bearing, riser II is fixed on tower tray, and the provided circumferentially about of riser I has rectification channel.The demister of the present invention realizes the separation of drop and gas by rectification, acceleration and shaving effect of the fluid in flow process.The demister of the present invention is simple in structure, easy for installation, less scaling, can effectively realize gas-liquid separation, reduces entrainment.
Description
Technical field
The present invention relates to a kind of gas-liquid separation equipment, especially a kind of efficient rotary type demister.
Background technology
A large amount of SO is generated in the production process of the industries such as electric power, metallurgy, petrochemical industry2With the harmful substances such as dust, bring
Serious acid rain harm and haze weather, are the atmosphere pollutions of the current priority control in China.Currently, field of environment protection generally uses
Wet desulfurizing process removes the harmful substances such as the sulfur dioxide in flue gas, i.e., to flue gas spray lye to absorb or adsorb this
A little harmful substances.With a large amount of grain sizes it is about 10~60 micro- in the flue gas after the desulfurization of absorption tower however, in process of wet desulphurization
The fine drop of rice, dissolved with sulfuric acid, sulfate, SO in these drops2Deng, atmospheric environment can not only be polluted, while
More serious corrosion and fouling are caused to follow-up equipment.When therefore, using wet desulfurizing process, cleaned gas is leaving suction
Demisting is had to before receiving tower, and depends on demister the step for demisting to complete.
Demister is generally located at the top of absorption tower, when the gas containing mist passes through demister with certain speed, meeting
Bump against with demister internal structure, and depends on the surface thereof.Mist on demister internal structure surface, by spreading and again
The effect of power can gradually be assembled, and after weight reaches certain level, will be separated from demister internal structure, to real
Existing gas-liquid separation.When demister causes resistance drop to increase to predetermined value because of fouling in the process of running, it is necessary to start anti-
Cleaning procedure is rinsed demister, generally, is both needed to setting flooding nozzle in demister inlet end and exhaust end, at this time may
Lead to serious entrainment of the gas phase to liquid phase, leads to gas phase band liquid.
Common demister has mesh mist eliminator, collapser demister, rotational flow plate defroster etc..Although mesh mist eliminator energy
General mist is detached, but requires mist cleaning, air-flow velocity smaller, and resistance drop is big, service life is short, and equipment investment is big.
Demister is generally used horizontally disposed at present, and demister gas flow direction is vertical with silk screen, when gas velocity is relatively low, the mist of entrainment
Foam inertia is small, drifts in gas, cannot with silk screen making contact and be removed, and due to by separation drop and gas phase in inverse
Stream flow direction, gas are also easy to produce reentrainment to drop, and to make the reduction of gas-liquid separation efficiency, and there is also appearances for mesh mist eliminator
The problems such as easily blocking, pressure drop is big.The folding that direction is different, shape is different is installed inside blade type, herringbone demister
Flowing plate increases defogging effect, structure is more complex, and separating effect is bad to form small runner.Rotational flow plate defroster is by separating liquid
Drop is identical as gas flow, is also easy to produce reentrainment, reduces demisting efficiency, and pressure drop is big, energy consumption is higher.
The demister element that CN200410014713.X is introduced is made of baffle plate and flue gas flow field adjustment block, and baffle plate is fixed
In flue gas flow field adjustment block, the density and shape of baffle plate change according to the flow area variation of flow field parameter everywhere, from
And the flow area of air-flow in absorption tower is made to be evenly distributed, but still do not break away from drop descent, gas-liquid counter current is existing
As being also easy to produce reentrainment.
The demister that CN200920128824.1 is introduced is made of cooler, coarse defogging device and smart demister etc., coarse defogging
Device is corrugated sheet or demisting plate, and smart demister is steel wire, which changes traditional demister drop and airflow direction is inverse
The shortcomings that stream flowing, improve demisting efficiency.But the demister structure is more complex, makes difficulty, and as a result of silk screen
Structure, demister pressure drop is larger, is also easier to block.
A kind of straight tube shape deflector type demister that CN203724892U is introduced is made of several demisting components, each demisting
Component includes riser and outer barrel, and the circumference of riser is provided with several seams, is set on the riser circumference close to each item seam
It is equipped with groove and the tangential flow guiding wing, the tangential flow guiding wing plays guide functions, gas flow is made to change.It is being flowed over by fluid
Multiple baffling in journey realizes the separation of drop and gas, can effectively remove the smaller drop of grain size, demisting efficiency is higher.But
After gas flows through the tangential flow guiding wing, gas direction still compares diverging, not enough concentrate, and gas velocity reduce, then with outer tube inner wall
Impact force is smaller when collision, influences defogging effect.The demister, which relies primarily on baffling, makes gas direction change, so gas with it is solid
Body wall face collides to realize gas-liquid separation, preferable for larger drop defogging effect but unknown for droplet effect
It is aobvious, and the demister structure is more complicated, the gap between riser and the tangential flow guiding wing is easy fouling.
US7618472B2 provides a kind of vane-type demister, and the demister is by structures such as corrugated sheet, tablet and louver boards
At, and form many cavitys or runner.After gas-liquid mixture enters demister, fluid course shifts so that fluid flows to
Changed for several times, and velocity variations obtain very fast, liquid phase is easy to separate from gas phase.The technology liquid phase and gas phase point
From in the process, may be implemented gas liquid cross-flow, therefore gas phase substantially reduces the reentrainment effect of drop, but the technical pattern
Extremely complex, difficulty of processing is also bigger, and corresponding processing and fabricating expense is relatively high.
Invention content
In view of the deficiencies of the prior art, it the present invention provides a kind of efficient rotary type demister, is being flowed over by fluid
Rectification, acceleration in journey and shaving effect realize the separation of drop and gas.The demister of the present invention is simple in structure, and pressure drop is small,
It is less scaling, it is easy for installation, entrainment is reduced, can effectively realize gas-liquid separation.
The efficient rotary type demister of the present invention includes several demisting components arranged side by side, and each demisting component includes rising
Tracheae and outer barrel, outer barrel are arranged in the outside of riser, and preferably on the same axis with riser, outer tube inner wall is equipped with spiral wing
Piece；The riser is divide into upper part and lower part in an axial direction, and top is divided into riser I, and lower part is divided into riser II, riser I
It is connect by bearing with riser II, the top setting capping plate of riser I, riser II is fixed on tower tray；Riser I's
Several rectification channels are uniformly arranged on circumference, rectification channel is embedded in along the tangential direction level of riser I outer walls, and rectification channel is leaned on
The side wall I and riser I tube walls of nearly outer barrel side are tangent, and another side wall II intersects with riser I tube walls, each rectification channel rotation
Direction is identical；Rectification channel roof is flushed with capping plate, and bottom is intersected with riser I tube walls.
In the demister of the present invention, outer tube inner wall is equipped with forms continuous helical fin along helix from down to up；Spiral shell
Spin line uses single line or multi-thread cylindrical thread line, and the helical angle of helix is φ, and φ is 4~60 °；The section of fin is preferably square
Shape, the thickness of helical fin are less than the thickness of outer barrel, and the width S of fin is 10~800mm, preferably 50~350mm；Helical fin
It can linearly extend along hand of helix, or extend along hand of helix undulate；Two adjacent rings spiral on axial direction
The distance between fin is P, and distance P is 8~100mm, preferably 10~40mm, the distance between circle helical fin of arbitrary neighborhood two
It may be the same or different, preferably equidistant arrangement；The outer rim of the helical fin（Close to riser side）Away from a liter gas
Pipe outer wall keeps a distance, preferably 20~60mm.
In the demister of the present invention, the rotation direction of the helical fin is identical as the direction of rotation in rectification channel.
In the demister of the present invention, two surfaces are equipped with many small protrusions, the height of small protrusion to the helical fin up and down
Degree is 2~10mm.
In the demister of the present invention, the rectification channel generally setting 1 ~ 12, preferably 4-8.The wall in rectification channel
It is thick preferably identical as the wall thickness of riser I.
In the demister of the present invention, the length l in rectification channel is the length of side wall II, and width w is rectification channel two side
Between maximum horizontal range, maximum normal distances of the height h between rectification channel roof and bottom；Wherein length l is width w's
2 ~ 5 times, preferably 3 ~ 4 times；The cross sectional shape in rectification channel be rectangle, ellipse, circle, it is trapezoidal or semicircle etc. in one kind
Or several combinations, one or more of preferably rectangular, oval or round combination.The size in rectification channel is according to actual
Operating mode or design requirement, are determined by those skilled in the art, and the height h in such as rectification channel is generally 20~600mm,
Preferably 100~300mm；The width w in rectification channel is generally 10~200mm, preferably 20~100mm.Rectification channel it is total
Sectional area is 0.2 ~ 0.9 times of riser I cross-sectional areas, preferably the 0.3 ~ 0.6 of riser I cross-sectional areas times.
In the demister of the present invention, the ends side wall II in the rectification channel can flush or stretch with riser I inner walls
It is 0.1 ~ 0.9 times, preferably 0.3 ~ 0.6 times of length l to enter to certain distance m inside riser I, m.When the side wall in rectification channel
When the ends II are flushed with riser I inner walls, rectification the bottom of the channel end is also flushed with riser I inner walls；When the side in rectification channel
When wall II extend into certain distance m inside riser I, rectification the bottom of the channel end is flushed with side wall end.
In the demister of the present invention, it is 60~300mm that there are certain distance A, distance A in rectification the bottom of the channel apart from tower tray, excellent
It is selected as 80~120mm.
In the demister of the present invention, it is 20~200mm that bearing bottom and tower tray, which have certain distance K, distance K, preferably 40
~80mm.
In the demister of the present invention, the lower ends riser II and tower tray are and close with tower tray flush or below tower tray certain distance
Connection is closed, the height of riser I is 1.1 ~ 3 times of rectification channel height, preferably 1.5 ~ 2 times.Riser I is straight with riser II's
The percent opening of diameter and tower tray can be determined according to actual operating mode or design requirement by those skilled in the art.
The present invention demister in, the rectification channel, capping plate and riser I can weld together or integral into
Type.
In the demister of the present invention, the outer barrel is preferably cylinder, and outer barrel diameter D is the 1.5-6 of draft tube diameter d
Times, preferably 2-3 times.Upper edge the certain distance C, distance C that the upper edge of outer barrel is higher by riser are the 1~8 of rectification channel height h
Times, preferably 2~5 times.The lower edge of outer barrel has a certain distance B apart from tower tray, and less than the lower edge in rectification channel, outer barrel lower edge away from
The distance B of tower tray is 5~100mm, preferably 20~50mm.The overall height H of outer barrel is 2.5~10 times of rectification channel height,
Preferably 3~5 times.
In the demister of the present invention, toothing or wavy shaped configuration can also be arranged in the lower ending opening of the outer barrel,
It is dripped from the inner wall of outer barrel at continuous flow to be more conducive to the liquid isolated.
The junction of each component of demister of the present invention ensures sealing, does not generate gas leak phenomenon.
The demister of the present invention, when work, the gas of entrained drip enters riser II from tower tray lower space, then upwards
Riser I is flowed into, gas phase flow direction changes after encountering capping plate, i.e., is changed to horizontal or approximate water by ascent direction
Square to, and part droplet is since effect of inertia collides with capping plate, and is attached on capping plate, the drop of attachment by
Gradual change is big, when drop arrives greatly the resultant force of the climbing power that the gravity that its own is generated is more than gas and surface tension of liquid, drop
It is just separated from capping plate surface, completes first time gas-liquid separation.Since there is certain length in rectification channel, and it is whole
Circulation road total sectional area is less than riser I cross-sectional areas, and the gas of the more dispersed entrained drip of script directional velocity is entering
Behind rectification channel, directional velocity is changed to the direction along rectification channel, directional velocity comparison rule and concentration, and due to circulating face
Product reduces, and speed increases after so that the gas of entrained drip is entered rectification channel.When the directional velocity of the gas of entrained drip changes,
Partial drop collides with rectification vias inner walls, and is attached in rectification vias inner walls, and then is constantly flowed through rectification channel
Gas blowout rectification channel and fall, complete second of gas-liquid separation.Meanwhile in rectification channel, due to entrained drip
Gas velocity direction changes, and part droplet issues raw mutually collision in inertia force effect, and droplet aggregation becomes big drop, and
Speed increases when the gas stream of entrained drip rectified channel, exacerbates the movement of drop, improves what droplet mutually collided
Probability makes droplet be easier to assemble as big drop, and with gas with larger speed outflow rectification channel.From rectification
The gas of the entrained drip of channel outflow has larger speed, and directional velocity compares concentration, and the drop carried secretly is bigger, after
It is continuous to collide with outer tube inner wall, change the flow direction of gas again, i.e., the gas of entrained drip is by along rectification channel side
It is flowed to the circumferencial direction being changed to along outer tube inner wall.Due to the rotation direction of helical fin being arranged on outer tube inner wall and rectification channel
Direction of rotation it is identical, i.e., the high-speed gas of entrained drip on outer tube inner wall helical fin rotation flows up, carry secretly liquid
The gas velocity of drop is larger, thus big drop outer is constantly thrown toward under the action of inertia force and along helical fin fair current and
Under；Simultaneously as there are many small protrusions on helical fin, the friction and collision of gas and helical fin upper and lower surface are enhanced,
So that smaller droplet is constantly assembled and become larger in helical fin surface, and then go downstream along helical fin；And gas is then
Continue that high speed is kept to flow up along outer tube inner wall rotation, realizes gas-liquid separation for the third time, and reduce entrainment.And
When the gas of entrained drip is flowed out from rectification channel, under the impetus of gas, riser I occurs to turn by connecting bearing
Dynamic, the rotation direction of riser I is oppositely oriented with rectification channel, makes continuously to hit outer barrel from the gas after the outflow of rectification channel
Inner circumferential wall everywhere, without being merely to hit outer tube inner wall fixed position, strengthens shaving effect, while being more favorable to gas
It is uniformly distributed in outer barrel.By above-mentioned rectification, acceleration and shaving effect, fluid is made to realize drop and gas in flow process
Separation.
Application of the demister of the present invention in the absorption tower using wet desulfurizing process, generally enters the gas of riser II
Speed is 3-20m/s, and the gas velocity of rectification channel outlet is 10-40m/s, and the gas velocity of rectification channel outlet is the gas into riser II
1.5 ~ 3 times of speed.
Compared with prior art, demister of the invention has the following advantages：
1, it is connected by bearing between riser I and riser II, riser I rotates under the influence of gas, riser I
Rotation direction and rectification channel it is oppositely oriented, so that the gas after being flowed out from rectification channel is continuously hit outer barrel inner circumferential wall each
Place strengthens shaving effect without being merely to hit outer tube inner wall fixed position, while it is equal in outer barrel to be more favorable to gas
Even distribution.
2, rectification channel has certain length, the gas of the more dispersed entrained drip of script directional velocity whole entering
After circulation road, directional velocity is changed to the direction along rectification channel, directional velocity comparison rule and concentration；And rectification channel is always cut
Area is less than riser I cross-sectional areas, and since circulation area reduces, speed increases after so that the gas of entrained drip is entered rectification channel
Add.
3, the rotation direction for the helical fin being arranged on outer tube inner wall is identical as the direction of rotation in rectification channel, the height of entrained drip
Helical fin rotation of the fast gas on outer tube inner wall flows up, and big drop is constantly thrown toward outer under the action of inertia force
And it goes downstream along helical fin；Simultaneously as there are many small protrusions on helical fin, gas and helical fin or more are enhanced
The friction and collision on surface so that smaller droplet is constantly assembled and become larger in helical fin surface, and then along helical fin
It goes downstream；And gas then continues that high speed is kept to flow up along outer tube inner wall rotation.
4, it can efficiently achieve the effect that demisting, effectively remove the smaller drop of the grain size carried secretly in gas, demisting effect
Rate is high, reduces the harm to environment, plays the role of environmental protection.
5, gas flow uniform, flow resistance is small, and resistance reduces.
6, simple in structure, it is easy to make, it is not easy to plug and fouling, without backwash.
7, water-saving result is good, and the moisture removed from the gas of entrained drip can reduce water consumption with recycling.
Description of the drawings
Fig. 1 is the demister structural schematic diagram of the present invention.
Fig. 2 is a kind of rectification channel cross-section schematic diagram in the demister of the present invention.
Fig. 3 be the present invention demister in another rectification channel schematic cross-section.
Fig. 4 is the outer barrel of demister and the helical fin structure schematic diagram of outer tube inner wall.
Fig. 5 is the outer barrel of demister and the helical fin circumferential direction sectional view of outer tube inner wall.
In figure respectively label for：1- tower trays；2- riseies II；3- bearings；4- rectifications channel；5- outer barrels；6- riseies I；7-
Cover plate；8- helical fins；The small protrusions of 9-.
Specific implementation mode
The 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, and each demisting component includes riser and outer barrel
5, outer barrel 5 is arranged in the outside of riser, and preferably on the same axis with riser, 5 inner wall of outer barrel is equipped with helical fin 8；Institute
The riser stated is divide into upper part and lower part in an axial direction, and top is divided into riser I6, and lower part is divided into riser II2, riser I6 with
Riser II2 is connected by bearing 3, and the top setting capping plate 7 of riser I6, riser II2 is fixed on tower tray 1；Rise gas
Several rectification channels 4 are uniformly arranged on the circumference of pipe I6, rectification channel 4 is embedded in along the tangential direction level of riser I6 outer walls,
Side wall I and riser I6 tube wall of the rectification channel 4 close to 5 side of outer barrel are tangent, and another side wall II intersects with riser I6 tube walls,
Each 4 direction of rotation of rectification channel is identical；4 top of rectification channel is flushed with capping plate 7, and bottom is intersected with riser I6 tube walls.
In the demister of the present invention, 5 inner wall of outer barrel is equipped with forms continuous helical fin 8 along helix from down to up；
Helix uses single line or multi-thread cylindrical thread line, and the helical angle of helix is φ, and φ is 4~60 °；The section of fin is preferably
Rectangle, the thickness of helical fin 8 are less than the thickness of outer barrel 5, and the width S of fin is 10~800mm, preferably 50~350mm；Spiral
Fin 8 can linearly extend along hand of helix, or extend along hand of helix undulate；Two adjacent rings on axial direction
The distance between helical fin 8 be P, distance P be 8~100mm, preferably 10~40mm, arbitrary neighborhood two enclose helical fin 8 between
Distance may be the same or different, preferably equidistant arrangement；The outer rim of the helical fin 8（Close to riser one
Side）A distance, preferably 20~60mm are kept away from riser outer wall.
In the demister of the present invention, the rotation direction of the helical fin 8 is identical as the direction of rotation in rectification channel 4.
In the demister of the present invention, described about 8 two surfaces of helical fin are equipped with many small by raised 9, and small raised 9
Height is 2~10mm.
In the demister of the present invention, the rectification channel 4 generally setting 1 ~ 12, preferably 4-8.Rectification channel 4
Wall thickness is preferably identical as the wall thickness of riser I6.
In the demister of the present invention, the length l in rectification channel 4 is the length of side wall II, and width w is 4 both sides of rectification channel
Maximum horizontal range between wall, height h are the maximum normal distance between 4 top and bottom of rectification channel；Wherein length l is width
2 ~ 5 times of w, preferably 3 ~ 4 times；The cross sectional shape in rectification channel 4 be rectangle, ellipse, circle, it is trapezoidal or semicircle etc. in
One or more combination, one or more of preferably rectangular, oval or round combination.The size in rectification channel 4 according to
Actual operating mode or design requirement, are determined by those skilled in the art, and the height h in such as rectification channel 4 is generally 20
~600mm, preferably 100~300mm；The width w in rectification channel 4 is generally 10~200mm, preferably 20~100mm.Rectification
The total sectional area in channel 4 is 0.2 ~ 0.9 times of riser I6 cross-sectional areas, preferably the 0.3 ~ 0.6 of riser I6 cross-sectional areas
Times.
The present invention demister in, the ends side wall II in the rectification channel 4 can be flushed with riser I6 inner walls or
It is extend into certain distance m inside riser I6, m is 0.1 ~ 0.9 times, preferably 0.3 ~ 0.6 times of length l.When rectification channel 4
When the ends side wall II are flushed with riser I6 inner walls, 4 bottom end of rectification channel is also flushed with riser I6 inner walls；When rectification is logical
When the side wall II in road 4 extend into certain distance m inside riser I6,4 bottom end of rectification channel is flushed with side wall end.
In the demister of the present invention, it is 60~300mm that 4 distance from bottom tower tray 1 of rectification channel, which has certain distance A, distance A,
Preferably 80~120mm.
In the demister of the present invention, it is 20~200mm that there are certain distance K, distance K in 3 bottom of bearing with tower tray 1, preferably
40~80mm.
In the demister of the present invention, the lower ends riser II2 and tower tray 1 are flush or below 1 certain distance of tower tray, and and tower tray
1 airtight connection, the height of riser I6 are 1.1 ~ 3 times of 4 height of rectification channel, preferably 1.5 ~ 2 times.Riser I6 and riser
The diameter of II2 and the percent opening of tower tray 1 can be given really according to actual operating mode or design requirement by those skilled in the art
It is fixed.
In the demister of the present invention, the rectification channel 4, capping plate 7 can weld together or whole with riser I6
It is body formed.
In the demister of the present invention, the outer barrel 5 is preferably cylinder, and 5 diameter D of outer barrel is the 1.5-6 of draft tube diameter d
Times, preferably 2-3 times.Upper edge the certain distance C, distance C that the upper edge of outer barrel 5 is higher by riser are the 1 of 4 height h of rectification channel
~8 times, preferably 2~5 times.The lower edge of outer barrel 5 has certain distance B apart from tower tray 1, and less than the lower edge in rectification channel 4, outer barrel
Distance B of 5 lower edges away from tower tray 1 is 5~100mm, preferably 20~50mm.The overall height H of outer barrel 5 is 4 height of rectification channel
2.5~10 times, preferably 3~5 times.
Embodiment one
Certain wet scrubber tower purifying smoke 150000Nm3/ h, wherein aobvious water concentration is 10~15g/Nm3, after demisting of the present invention
Water concentration is shown in exhaust<0.5g/Nm3, demisting efficiency >=95%.
Embodiment two
Certain wet scrubber tower purifying smoke 100000Nm3/ h, wherein aobvious water concentration is 12~16g/Nm3, after demisting of the present invention
Water concentration is shown in exhaust<0.6g/Nm3, demisting efficiency >=95%.
Claims (16)
1. a kind of efficient rotary type demister includes several demisting components arranged side by side, each demisting component include riser and
Outer barrel, it is characterised in that：Outer barrel is arranged in the outside of riser, and outer tube inner wall is equipped with helical fin；The riser is along axis
To being divide into upper part and lower part, top is divided into riser I, and lower part is divided into riser II, riser I and riser II and is connected by bearing
It connects, the top setting capping plate of riser I, riser II is fixed on tower tray；It is uniformly arranged on the circumference of riser I several whole
Circulation road, rectification channel along riser I outer walls tangential direction level be embedded in, rectification channel close to outer barrel side side wall I with
Riser I tube walls are tangent, and another side wall II intersects with riser I tube walls, and each rectification channel direction of rotation is identical；It pushes up in rectification channel
Portion is flushed with capping plate, and bottom is intersected with riser I tube walls.
2. demister described in accordance with the claim 1, it is characterised in that：Outer tube inner wall is equipped with is formed along helix from down to up
Continuous helical fin；Helix uses single line or multi-thread cylindrical thread line, and the helical angle of helix is φ, and φ is 4~60 °.
3. according to demister as claimed in claim 1 or 2, it is characterised in that：The rectangular cross-section of helical fin, helical fin
Width S is 10~800mm；Helical fin can linearly extend along hand of helix, or prolong along hand of helix undulate
Exhibition.
4. according to demister as claimed in claim 1 or 2, it is characterised in that：On axial direction between two adjacent rings helical fin
Distance be P, distance P be 8~100mm.
5. according to demister as claimed in claim 1 or 2, it is characterised in that：The distance between two adjacent rings helical fin be etc.
Away from arrangement.
6. according to demister as claimed in claim 1 or 2, it is characterised in that：The rotation direction of the helical fin and rectification channel
Direction of rotation it is identical.
7. according to demister as claimed in claim 1 or 2, it is characterised in that：The helical fin is equipped on two surfaces up and down
The height of many small protrusions, small protrusion is 2~10mm.
8. demister described in accordance with the claim 1, it is characterised in that：The rectification channel is arranged 1 ~ 12.
9. demister described in accordance with the claim 1, it is characterised in that：The length l in rectification channel is the length of side wall II, width
Maximum horizontal ranges of the w between the two side of rectification channel, maximum normal distances of the height h between rectification channel roof and bottom；
Wherein length l is 2 ~ 5 times of width w；The cross sectional shape in rectification channel is in rectangle, ellipse, circle, trapezoidal or semicircle
One or more combination.
10. demister described in accordance with the claim 1, it is characterised in that：The total sectional area in rectification channel is the cross sections riser I
Long-pending 0.2 ~ 0.9 times.
11. demister described in accordance with the claim 1, it is characterised in that：The ends side wall II in the rectification channel and liter gas
Pipe I inner walls flush or extend into certain distance m inside riser I, and m is 0.1 ~ 0.9 times of length l.
12. demister described in accordance with the claim 1, it is characterised in that：There is certain distance A in rectification the bottom of the channel apart from tower tray,
Distance A is 60~300mm.
13. demister described in accordance with the claim 1, it is characterised in that：Bearing bottom and tower tray have certain distance K, the distance K to be
20~200mm.
14. demister described in accordance with the claim 1, it is characterised in that：The lower ends riser II are with tower tray flush or below tower tray
Certain distance, and with tower tray airtight connection, the height of riser I is 1.1 ~ 3 times of rectification channel height.
15. demister described in accordance with the claim 1, it is characterised in that：The outer barrel is cylinder, and outer barrel diameter D is to rise gas
1.5-6 times of pipe diameter d；Upper edge the certain distance C, distance C that the upper edge of outer barrel is higher by riser are the 1 of rectification channel height h
~8 times；The lower edge of outer barrel has certain distance B apart from tower tray, and less than the lower edge in rectification channel, distance of the outer barrel lower edge away from tower tray
B is 5~100mm, and the overall height H of outer barrel is 2.5~10 times of rectification channel height.
16. a kind of application of demister described in claim 1 in the absorption tower of wet desulfurizing process, it is characterised in that：Into
The gas velocity for entering riser is 3-20m/s, and the gas velocity of rectification channel outlet is 10-40m/s, and the gas velocity of rectification channel outlet is to enter
1.5 ~ 3 times of the gas velocity of riser.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710109525.2A CN108499230B (en) | 2017-02-27 | 2017-02-27 | High-efficient rotary type defroster |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710109525.2A CN108499230B (en) | 2017-02-27 | 2017-02-27 | High-efficient rotary type defroster |
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| Publication Number | Publication Date |
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| CN108499230A true CN108499230A (en) | 2018-09-07 |
| CN108499230B CN108499230B (en) | 2020-01-10 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201710109525.2A Active CN108499230B (en) | 2017-02-27 | 2017-02-27 | High-efficient rotary type defroster |
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| CN111068412A (en) * | 2018-10-18 | 2020-04-28 | 郝占宁 | A spiral-type demisting and dehumidifying device |
| CN113368608A (en) * | 2021-06-17 | 2021-09-10 | 承德石油高等专科学校 | Gas-liquid separator for oil field |
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|---|---|
| CN108499230B (en) | 2020-01-10 |
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Effective date of registration: 20230829 Address after: 100728 No. 22 North Main Street, Chaoyang District, Beijing, Chaoyangmen Patentee after: CHINA PETROLEUM & CHEMICAL Corp. Patentee after: Sinopec (Dalian) Petrochemical Research Institute Co.,Ltd. Address before: 100728 No. 22 North Main Street, Chaoyang District, Beijing, Chaoyangmen Patentee before: CHINA PETROLEUM & CHEMICAL Corp. Patentee before: DALIAN RESEARCH INSTITUTE OF PETROLEUM AND PETROCHEMICALS, SINOPEC Corp. |