CN108499239A - A kind of high-efficiency multi-stage demister - Google Patents
A kind of high-efficiency multi-stage demister Download PDFInfo
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- CN108499239A CN108499239A CN201710109523.3A CN201710109523A CN108499239A CN 108499239 A CN108499239 A CN 108499239A CN 201710109523 A CN201710109523 A CN 201710109523A CN 108499239 A CN108499239 A CN 108499239A
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- riser
- demister
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- rectification channel
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D45/00—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces
- B01D45/12—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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D45/00—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces
- B01D45/04—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces by utilising inertia
- B01D45/08—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces by utilising inertia by impingement against baffle separators
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- Separating Particles In Gases By Inertia (AREA)
Abstract
The invention discloses a kind of high-efficiency multi-stage demisters.The demister includes several demisting components, and each demisting component includes riser and outer barrel, and outer barrel is arranged in the outside of riser, and on the same axis with riser, helical fin is arranged on outer tube inner wall；Riser is fixed on tower tray, and the top setting capping plate of riser, provided circumferentially about in riser has rectification channel；Helical fin is arranged in outer tube inner wall.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 high-efficiency multi-stage 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, the present invention provides a kind of high-efficiency multi-stage demisters, by fluid in flow process
In rectification, acceleration and shaving effect, realize drop and gas separation.The demister of the present invention is simple in structure, and pressure drop is small, no
Easy fouling, it is easy for installation, entrainment is reduced, can effectively realize gas-liquid separation.
The demister of the present invention includes several demisting components arranged side by side, and each demisting component includes riser and outer
Cylinder, outer barrel are arranged in the outside of riser, and preferably on the same axis with riser, outer tube inner wall is equipped with helical fin；Rise gas
Pipe is fixed on tower tray, the top setting capping plate of riser；Several rectification channels, rectification are uniformly arranged on the circumference of riser
Channel is embedded in along the tangential direction level of riser outer wall, side wall I and riser tube wall phase of the rectification channel close to outer barrel side
It cuts, another side wall II intersects with riser tube wall, and each rectification channel direction of rotation is identical；Rectification channel roof and capping plate are neat
Flat, bottom is intersected with riser tube wall.
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.
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 cross-sectional area, preferably the 0.3 ~ 0.6 of riser cross-sectional area times.
In the demister of the present invention, the ends side wall II in the rectification channel can flush or stretch into riser inner wall
It is 0.1 ~ 0.9 times, preferably 0.3 ~ 0.6 times of length l to un-obstructed draft tube interior certain distance m, m.As the side wall II in rectification channel
When end is flushed with riser inner wall, rectification the bottom of the channel end is also flushed with riser inner wall；As the side wall II in rectification channel
When extending into un-obstructed draft tube interior certain distance m, rectification the bottom of the channel end is flushed with side wall end.
In the demister of the present invention, it is 20~200mm that there are certain distance A, distance A in rectification the bottom of the channel apart from tower tray, excellent
It is selected as 40~80mm.
In the demister of the present invention, riser lower end is concordant with tower tray or is less than tower tray a distance, the two airtight connection；
The diameter of riser and the percent opening of tower tray can be given really according to actual operating mode or design requirement by those skilled in the art
It is fixed.
The present invention demister in, the rectification channel, capping plate and riser 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, the bottom setting of riser is lower to cover plate, and the bottom of riser is less than one spacing of tower tray
From, riser tower tray to be uniformly provided with several air admission holes on the circumference of lower part, be arranged on the riser inner wall of air inlet position into
Conductance flowing plate.The air admission hole generally setting 3 ~ 12, preferably 6-10；The cross sectional shape of air admission hole be rectangle, ellipse,
One or more of round, trapezoidal or semicircle etc. combination, one or more of preferably rectangular, oval or round group
It closes；The total sectional area of air admission hole is 0.6 ~ 1.5 times of riser sectional area, preferably 0.8 ~ 1.2 times, and specific size is according to actual
Operating mode or design requirement, are determined by those skilled in the art；Two songs above and below in air admission hole and riser outer wall intersection
The section for the riser outer wall that line midpoint line is done and the angle of the air inlet deflector plane close to air admission hole side are θ, and θ is
10 ° ~ 60 °, preferably 20 ° ~ 35 °.The air inlet deflector is axially disposed within air inlet bore edges along riser, by connector with
Riser inner wall connects；The connector is made of baffle and shaft, and baffle is axially fixed with riser inner wall along riser
Connection, air inlet deflector are connect by shaft with baffle, and air inlet deflector is where the maximum angle that shaft rotates is baffle
Position.The rotation direction of each air inlet deflector is identical as the rotation direction of blade, and the shape of air inlet deflector can be rectangle, ellipse, circle
Shape, trapezoidal or one or more of semicircle etc. combination, preferably identical as the shape of air admission hole, air inlet deflector sectional area is
1.1 ~ 2 times of air admission hole sectional area, preferably 1.3 ~ 1.5 times.
In the demister of the present invention, the outer barrel is with helical fin by being welded to connect.
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, Vapor Entrainment from tower tray lower space
Liquid phase rises, and gas phase flow direction changes after encountering capping plate, i.e., is changed to horizontal or level of approximation direction by ascent direction,
And part droplet due to effect of inertia with capping plate collide, and be attached to capping plate on, the drop of attachment becomes larger,
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 is just from capping
It is separated in plate surface, completes first time gas-liquid separation；The gas of entrained drip along horizontal or level of approximation direction into
Enter rectification channel, since there is certain length in rectification channel, and rectification channel total sectional area is less than riser cross-sectional area, originally
The gas of the more dispersed entrained drip of directional velocity, after entering rectification channel, directional velocity is changed to along rectification channel
Direction, directional velocity comparison rule and concentration, and since circulation area reduces, after so that the gas of entrained drip is entered rectification channel
Speed increases.When the directional velocity of the gas of entrained drip changes, partial drop collides with rectification vias inner walls, and adheres to
It in rectification vias inner walls, and then is constantly flowed through the gas blowout rectification channel in rectification channel and is fallen, complete second of gas
Liquid detaches.Meanwhile in rectification channel, since the gas velocity direction of entrained drip changes, part droplet is in inertia masterpiece
With lower generation mutually collision, droplet aggregation becomes big drop, and speed increases when the gas stream rectified channel of entrained drip,
The movement for exacerbating drop improves the probability that droplet mutually collides, and droplet is made to be easier to assemble as big drop, and with
Gas is together with larger speed outflow rectification channel.The gas of the entrained drip flowed out from rectification channel has larger speed
Degree, directional velocity compares concentration, and the drop carried secretly is bigger, and continuation collides with outer tube inner wall, changes gas again
Flow direction, the i.e. gas of entrained drip along rectification channel direction by being changed to flow along the circumferencial direction of outer tube inner wall.By
It is identical as the direction of rotation in rectification channel in the rotation direction for the helical fin being arranged on outer tube inner wall, i.e. the high-speed gas of entrained drip
Helical fin rotation on outer tube inner wall flows up, and the gas velocity of entrained drip is larger, therefore big drop is in inertia force
Under the action of be constantly thrown toward outer and go downstream along helical fin；Simultaneously as there are many small protrusions on helical fin, increase
The strong friction and collision of gas and helical fin upper and lower surface so that smaller droplet constantly the aggregation of helical fin surface and by
Gradual change is big, and then goes downstream along helical fin；And gas then continues that high speed is kept to flow up along outer tube inner wall rotation, third
It is secondary to realize gas-liquid separation, and reduce entrainment.By above-mentioned rectification, acceleration and shaving effect, fluid is made to flow
The separation of drop and gas is realized in the process.
Application of the demister of the present invention in the absorption tower using wet desulfurizing process, generally enters the gas velocity of riser
Gas velocity for 3-20m/s, rectification channel outlet is 10-40m/s, and the gas velocity of rectification channel outlet is into the gas velocity of riser
1.5 ~ 3 times.
Compared with prior art, demister of the invention has the following advantages：
1, rectification channel has certain length, the gas of the more dispersed entrained drip of script directional velocity logical entering rectification
Behind road, directional velocity is changed to the direction along rectification channel, directional velocity comparison rule and concentration；And rectification channel total sectional area
Less than riser cross-sectional area, since circulation area reduces, speed increases after so that the gas of entrained drip is entered rectification channel.
2, 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.
3, riser lower end has lower capping plate, the circumferencial direction of riser lower end to be uniformly provided with several air admission holes, air admission hole
Several air inlet deflectors are arranged in the riser inner wall at place, after so that gas is entered riser in the horizontal direction, encounter air inlet deflector
Gas phase flow direction is set to be changed to tangential direction by radial direction, it, can be according to gas since air inlet deflector can rotate
Uninterrupted automatically adjust the corner of air inlet deflector in a certain range, be suitable for the larger occasion of gas flow fluctuations.
4, the effect of demisting can be effectively achieved, the smaller drop of the grain size carried secretly in gas, demisting effect are effectively removed
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 schematic cross-section in rectification channel 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.
Fig. 6 is the schematic cross-section of air admission hole and air inlet deflector.
In figure respectively label for：1- tower trays；2- riseies；3- rectifications channel；4- outer barrels；5- covers plate；6- helical fins；7-
Small protrusion；8- air admission holes；9- shafts；10- baffles；11- air inlet deflectors.
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 2 and outer
Cylinder 4, outer barrel 4 is arranged in the outside of riser 2, and preferably on the same axis with riser 2,4 inner wall of outer barrel is equipped with helical fin
6；Riser 2 is fixed on tower tray 1, the top setting capping plate 5 of riser 2；It is uniformly arranged on the circumference of riser 2 several whole
Circulation road 3, rectification channel 3 are embedded in along the tangential direction level of 2 outer wall of riser, side wall of the rectification channel 3 close to 4 side of outer barrel
I and 2 tube wall of riser are tangent, and another side wall II intersects with 2 tube wall of riser, and each 3 direction of rotation of rectification channel is identical；Rectification is logical
3 top of road is flushed with capping plate 5, and bottom is intersected with 2 tube wall of riser.
In the demister of the present invention, 4 inner wall of outer barrel is equipped with forms continuous helical fin 6 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 6 are less than the thickness of outer barrel 4, and the width S of fin is 10~800mm, preferably 50~350mm；Spiral
Fin 6 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 6 be P, distance P be 8~100mm, preferably 10~40mm, arbitrary neighborhood two enclose helical fin 6 between
Distance may be the same or different, preferably equidistant arrangement；The outer rim of the helical fin 6（Close to riser 2 one
Side）A distance, preferably 20~60mm are kept away from 2 outer wall of riser.
In the demister of the present invention, the rotation direction of the helical fin 6 is identical as the direction of rotation in rectification channel 3.
In the demister of the present invention, described about 6 two surfaces of helical fin are equipped with many small protrusions, the height of small protrusion
Degree is 2~10mm.
In the demister of the present invention, the rectification channel 3 generally setting 1 ~ 12, preferably 4-8.Rectification channel 3
Wall thickness is preferably identical as the wall thickness of riser 2.
In the demister of the present invention, the length l in rectification channel 3 is the length of side wall II, and width w is 3 both sides of rectification channel
Maximum horizontal range between wall, height h are the maximum normal distance between 3 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 3 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 3 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 3 is generally 20
~600mm, preferably 100~300mm；The width w in rectification channel 3 is generally 10~200mm, preferably 20~100mm.Rectification
The total sectional area in channel 3 is 0.2 ~ 0.9 times of 2 cross-sectional area of riser, preferably 0.3 ~ 0.6 times of 2 cross-sectional area of riser.
In the demister of the present invention, the ends side wall II in the rectification channel 3 can flush or stretch with 2 inner wall of riser
It is 0.1 ~ 0.9 times, preferably 0.3 ~ 0.6 times of length l to enter to 2 inside certain distance m of riser, m.When the side in rectification channel 3
When the ends wall II are flushed with 2 inner wall of riser, 3 bottom end of rectification channel is also flushed with 2 inner wall of riser；When rectification channel 3
Side wall II when extending into 2 inside certain distance m of riser, 3 bottom end of rectification channel is flushed with side wall end.
In the demister of the present invention, it is 20~200mm that 3 distance from bottom tower tray 1 of rectification channel, which has certain distance A, distance A,
Preferably 40~80mm.
In the demister of the present invention, 2 lower end of riser is concordant with tower tray 1 or is less than 1 a distance of tower tray, the closed company of the two
It connects；The diameter of riser 2 and the percent opening of tower tray 1 can be according to actual operating mode or design requirements, by those skilled in the art
It is determined.
In the demister of the present invention, the rectification channel 3, capping plate 5 can weld together with riser 2 or entirety
Molding.
In the demister of the present invention, the outer barrel 4 is preferably cylinder, and 4 diameter D of outer barrel is the 1.5- of 2 diameter d of riser
6 times, preferably 2-3 times.Upper edge the certain distance C, distance C that the upper edge of outer barrel 4 is higher by riser 2 are 3 height h's of rectification channel
1~8 times, preferably 2~5 times.The lower edge of outer barrel 4 has certain distance B apart from tower tray 1, and less than the lower edge in rectification channel 3, outside
Distance B of 4 lower edges of cylinder away from tower tray 1 is 5~100mm, preferably 20~50mm.The overall height H of outer barrel 4 is 3 height of rectification channel
2.5~10 times, preferably 3~5 times.
In the defogging equipment of the present invention, the bottom setting of riser is lower to cover plate, and the bottom of riser is certain less than tower tray
Distance, riser tower tray are arranged with being uniformly provided with several air admission holes 8 on the circumference of lower part on the riser inner wall of air inlet position
Air inlet deflector 11.The air admission hole 8 generally setting 3 ~ 12, preferably 6-10；The cross sectional shape of air admission hole 8 be rectangle,
It is one or more of oval, round, trapezoidal or semicircle etc. to combine, one kind in preferably rectangular, oval or circle
Or several combinations；The total sectional area of air admission hole 8 is 0.6 ~ 1.5 times of riser sectional area, preferably 0.8 ~ 1.2 times, specific size
According to actual operating mode or design requirement, determined by those skilled in the art；In air admission hole and riser outer wall intersection
The section for the riser outer wall that upper and lower two mid point of curve lines are done and the air inlet deflector plane close to air admission hole side
Angle is θ, and θ is 10 ° ~ 60 °, preferably 20 ° ~ 35 °.The air inlet deflector 11 is axially disposed within air inlet hole edge along riser
Edge is connect by connector with riser inner wall；The connector is made of baffle 10 and shaft 9, and baffle 10 is along riser
Axial to be fixedly connected with riser inner wall, air inlet deflector 11 is connect by shaft 9 with baffle 10, air inlet deflector 11 around turn
The dynamic maximum angle of shaft rotation is baffle position.The rotation direction of each air inlet deflector is identical as the rotation direction of blade, air inlet deflector
11 shape can be rectangle, ellipse, circle, trapezoidal or one or more of semicircle etc. combination, preferably with air admission hole
Shape it is identical, air inlet deflector sectional area is 1.1 ~ 2 times of air admission hole sectional area, preferably 1.3 ~ 1.5 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 (20)
1. a kind of high-efficiency multi-stage demister, it is characterised in that：The demister includes several demisting components arranged side by side, each
Demisting component includes riser and outer barrel, and outer barrel, which is arranged on the outside of riser, outer tube inner wall, is arranged helical fin, rises gas
Pipe is fixed on tower tray, the top setting capping plate of riser, and several rectification channels are uniformly arranged on the circumference of riser；Rectification
Channel is embedded in along the tangential direction level of riser outer wall, side wall I and riser tube wall phase of the rectification channel close to outer barrel side
It cuts, another side wall II intersects rectification channel roof with riser tube wall and flushed with capping plate, and bottom is intersected with riser tube wall；Respectively
Rectification channel direction of rotation is identical.
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
Helical fin, it is φ that helix, which uses single line or multi-thread cylindrical thread line, the helical angle of helix, 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
Thickness is less than the thickness of outer barrel, and the width S of fin is 10~800mm, and helical fin linearly extends along hand of helix or edge
Hand of helix undulate extends.
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 outer rim of the helical fin away from riser outside
Wall keeps a distance.
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 several 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 riser cross section
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
It is 0.1 ~ 0.9 times of length l that inside pipe wall, which flushes or extend into un-obstructed draft tube interior certain distance m, m,.
12. demister according to claim 11, it is characterised in that：When in the ends side wall II in rectification channel and riser
When wall flushes, rectification the bottom of the channel end is also flushed with riser inner wall；When the side wall II in rectification channel is extend into riser
When portion certain distance m, rectification the bottom of the channel end is flushed with side wall end.
13. 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 20~200mm.
14. 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 P, distance P that the upper edge of outer barrel is higher by riser are the 1 of rectification channel height h
~8 times；Outer barrel lower edge has certain distance B apart from tower tray, and less than the lower edge in rectification channel；The overall height H of outer barrel is logical for rectification
2.5~10 times of road height.
15. demister described in accordance with the claim 1, it is characterised in that：The bottom setting of riser is lower to cover plate, riser
Bottom be less than tower tray certain distance, riser tower tray to be uniformly provided with several air admission holes on the circumference of lower part, air inlet position
Air inlet deflector is set on riser inner wall.
16. demister according to claim 15, it is characterised in that：The air admission hole is arranged 3 ~ 12, air admission hole
Cross sectional shape is rectangle, ellipse, circle, trapezoidal or one or more of semicircle combination；The total sectional area of air admission hole is
0.6 ~ 1.5 times of riser sectional area.
17. demister according to claim 15, it is characterised in that：Two above and below in air admission hole and riser outer wall intersection
The angle of the section for the riser outer wall that mid point of curve line is done and air inlet deflector plane close to air admission hole side is
θ, θ are 10 ° ~ 60 °.
18. demister according to claim 15, it is characterised in that：The air inlet deflector is axially arranged along riser
In air inlet bore edges, it is connect with riser inner wall by connector；The connector is made of baffle and shaft, and baffle is along liter
Tracheae is axially fixedly connected with riser inner wall, and air inlet deflector is connect by shaft with baffle, and air inlet deflector is around shaft
The maximum angle of rotation is baffle position.
19. demister according to claim 15, it is characterised in that：The rotation direction of each air inlet deflector and the rotation direction phase of blade
Together, the shape of air inlet deflector is rectangle, ellipse, circle, trapezoidal or one or more of semicircle combination, air inlet water conservancy diversion
Plate sectional area is 1.1 ~ 2 times of air admission hole sectional area.
20. application of the demister in the absorption tower of wet desulfurizing process described in a kind of claim 1 ~ 19, it is characterised in that：
Gas velocity into riser is 3-20m/s, and the gas velocity of rectification channel outlet is 10-40m/s, the gas velocity of rectification channel outlet be into
Enter 1.5 ~ 3 times of the gas velocity of riser.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710109523.3A CN108499239B (en) | 2017-02-27 | 2017-02-27 | High-efficient multistage defroster |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710109523.3A CN108499239B (en) | 2017-02-27 | 2017-02-27 | High-efficient multistage defroster |
Publications (2)
| Publication Number | Publication Date |
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| CN108499239A true CN108499239A (en) | 2018-09-07 |
| CN108499239B CN108499239B (en) | 2020-01-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710109523.3A Active CN108499239B (en) | 2017-02-27 | 2017-02-27 | High-efficient multistage defroster |
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| CN112156565A (en) * | 2020-09-14 | 2021-01-01 | 浙江佳运能源技术有限公司 | Mist catching device of slug flow catcher |
| CN113069837A (en) * | 2021-04-20 | 2021-07-06 | 赵禹 | Flexible belt type demisting device |
| CN113908320A (en) * | 2021-10-28 | 2022-01-11 | 西安泰维生物技术设备有限公司 | Atomized disinfectant generating device and drying method based on same |
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| CN113908320A (en) * | 2021-10-28 | 2022-01-11 | 西安泰维生物技术设备有限公司 | Atomized disinfectant generating device and drying method based on same |
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|---|---|
| CN108499239B (en) | 2020-01-10 |
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Effective date of registration: 20230904 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. |
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