CN108686431A - A kind of multistage defogging equipment - Google Patents
A kind of multistage defogging equipment Download PDFInfo
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- CN108686431A CN108686431A CN201710235060.5A CN201710235060A CN108686431A CN 108686431 A CN108686431 A CN 108686431A CN 201710235060 A CN201710235060 A CN 201710235060A CN 108686431 A CN108686431 A CN 108686431A
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- riser
- channel
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- multistage
- 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
- B01D45/04—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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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2247/00—Details relating to the separation of dispersed particles from gases, air or vapours by liquid as separating agent
- B01D2247/10—Means for removing the washing fluid dispersed in the gas or vapours
- B01D2247/106—Means for removing the washing fluid dispersed in the gas or vapours using a structured demister, e.g. tortuous channels
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Abstract
The invention discloses a kind of multistage defogging equipments, including several demisting components arranged side by side, each demisting component includes multistage riser and an outer barrel, and multistage riser is that increased coaxial riser, multistage riser are at least 2 grades to several calibers step by step from inside to outside;Outer barrel is arranged in the outside of multistage riser, on the same axis with riser;The innermost layer of multistage riser is the first order, and the top of riseies at different levels increases step by step from inside to outside.Several outlet rectifications channel is uniformly arranged on the circumference of riser upper ends at different levels respectively, the outlet rectification channel direction of rotation of riseies at different levels is identical as the air inlet rectification channel direction of rotation of first order riser.The multistage defogging equipment of the present invention is simple in structure, and pressure drop is small, less scaling, easy for installation, reduces entrainment, can effectively realize gas-liquid separation, is particularly suitable for the occasion that gas flow is larger and demisting is more demanding.
Description
Technical field
The present invention relates to a kind of gas-liquid separation equipment, especially a kind of multistage defogging equipment.
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 multistage defogging equipments, by fluid in flow process
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, is not easy
Fouling, it is easy for installation, entrainment is reduced, can effectively realize gas-liquid separation, it is larger and remove to be particularly suitable for gas flow
The more demanding occasion of mist.
The multistage defogging equipment of the present invention includes several demisting components arranged side by side, and each demisting component includes multistage rises
Tracheae and an outer barrel, multistage riser are several calibers increased coaxial riser step by step from inside to outside, multistage riser
At least 2 grades, preferably 2 ~ 5 grades, increasing proportion is 1.1 ~ 1.8 times to riser calibers at different levels step by step, and preferably equal proportion is incremented by;Outside
Cylinder is arranged in the outside of multistage riser, on the same axis with riser;The innermost layer of multistage riser is the first order, at different levels
The top of riser increases step by step from inside to outside, is respectively provided with capping plate at the top of riseies at different levels, first order riser is fixed on
On tower tray, and bottom is less than tower tray certain distance, remaining riser bottom at different levels is with first order riser in the above somewhere of tower tray
It is fixedly connected, riser bottoms at different levels are respectively provided with lower capping plate;First order riser is in tower tray with uniform on the circumference of lower part
Several air inlet rectifications channel is set, and air inlet rectification channel is embedded in along the tangential direction level of first order riser outer wall, and air inlet is whole
Side wall I and first order riser tube wall of the circulation road close to outer barrel side are tangent, another side wall II and first order riser tube wall
Intersection, each air inlet rectification channel direction of rotation is identical, and air inlet rectification the bottom of the channel is flushed with the lower capping plate of first order riser,
Intersect with first order riser tube wall at top;Several outlet rectifications channel is uniformly arranged on the circumference of riser upper ends at different levels respectively,
The outlet rectification channel of riseies at different levels is embedded in along riser outer wall tangential direction level, the outlet rectification channel of riseies at different levels
Side wall I and riser tube wall close to outer barrel side is tangent, and another side wall II intersects with riser tube wall, and riseies at different levels go out
Gas rectification channel direction of rotation is identical as the air inlet rectification channel direction of rotation of first order riser, the outlet of riseies at different levels
Rectification channel roof is flushed with the upper capping plate of riser, and bottom is intersected with the tube wall of riser.
In the multistage defogging equipment of the present invention, the outlet rectification channel of the riseies at different levels is arranged 1 ~ 12, preferably 4-8
A, the wall thickness in the outlet rectification channel of riseies at different levels is preferably identical as the wall thickness of riser;Outlet on riseies at different levels is whole
Circulation road number can be the same or different.
In the multistage defogging equipment of the present invention, the length l in outlet rectification channel is the length of outlet rectification channel side wall II,
Maximum horizontal ranges of the width w between the two side of outlet rectification channel, height h between outlet rectification channel roof and bottom most
Big vertical range;Wherein length l is 2 ~ 5 times, preferably 3 ~ 4 times of width w;The cross sectional shape in outlet rectification channel 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 size in the outlet rectification channel of riseies at different levels is according to actual operating mode or design requirement, by this field skill
Art personnel are determined.In general, the width w and length l in the outlet rectification channel of riseies at different levels should be not brush up against next stage
The tube wall of riser is limited, and the length l in the outlet rectification channel of riseies at different levels is preferably incremented by step by step from inside to outside, increasing proportion
It is 1.1~1.8 times.The total sectional area in outlet rectification channel is 0.2 ~ 0.9 times of first order riser cross-sectional area, preferably the
0.3 ~ 0.6 times of draft tube cross-sectional area.
In the multistage defogging equipment of the present invention, the ends side wall II in the outlet rectification channel can be with riser inner wall
It is 0.1 ~ 0.9 times, preferably 0.3 ~ 0.6 times of length l to flush or extend into un-obstructed draft tube interior certain distance m, m.When outlet is whole
When the ends side wall II of circulation road are flushed with riser inner wall, outlet rectification the bottom of the channel end is also flushed with riser inner wall;
When the side wall II in outlet rectification channel extend into un-obstructed draft tube interior certain distance m, outlet rectification the bottom of the channel end and side wall
End flushes.
In the multistage defogging equipment of the present invention, there is a spacing in outlet rectification the bottom of the channel of first order riser apart from tower tray
From A, distance A is 20~200mm, preferably 40~80mm, before outlet rectification the bottom of the channel of remaining riser at different levels is slightly above
The upper capping plate of draft tube.
In the multistage defogging equipment of the present invention, the lower capping plate of first order riser has certain distance B, distance B away from tower tray
For 1.1~3 times of air inlet rectification channel height, preferably 1.5~2 times.The lower capping plate of second level riser is less than the first order
Outlet rectification the bottom of the channel certain distance of riser, distance preferably 10~50mm.The lower capping plate of remaining riser at different levels
Can be concordant with the lower capping plate of second level riser, or it is certain less than outlet rectification the bottom of the channel of previous stage riser successively
Distance, preferably 10~50mm.
In the multistage defogging equipment of the present invention, the distance between the upper capping plate of riseies at different levels and lower capping plate are at different levels
The height of riser.
In the multistage defogging equipment of the present invention, the generally setting 1 ~ 12 of air inlet rectification channel, preferably 2-6.Air inlet rectification
The wall thickness in channel is preferably identical as the wall thickness of riser.
In the multistage defogging equipment of the present invention, the length e in air inlet rectification channel is the length of side wall II, and width f is air inlet
Maximum horizontal range between the two side of rectification channel, maximum normal distances of the height g between air inlet rectification channel roof and bottom;
Wherein length e is 1 ~ 3 times, preferably 1.2 ~ 2 times of width f;The cross sectional shape in air inlet rectification channel is rectangle, ellipse, circle
Shape, trapezoidal or one or more of semicircle etc. combination, one or more of preferably rectangular, oval or round group
It closes;The total sectional area in air inlet rectification channel is identical as riser cross-sectional area.The size in air inlet rectification channel is according to actual work
Condition or design requirement, are determined by those skilled in the art, and the ends side wall II in air inlet rectification channel and riser inner wall are neat
It is flat.
In the multistage defogging equipment of the present invention, air inlet rectification channel roof is less than tower tray a distance B, air inlet rectification channel
Bottom is concordant with lower capping plate;The number in air inlet rectification channel and the number in outlet rectification channel can be the same or different.
In the multistage defogging equipment of the present invention, first order riser and tower tray airtight connection, the diameter of first order riser
And the percent opening of tower tray can be determined according to actual operating mode or design requirement by those skilled in the art.
In the multistage defogging equipment of the present invention, the air inlet rectification channel, outlet rectification channel, upper capping plate, lower envelope
Cover board can weld together with riser or global formation.
In the multistage defogging equipment of the present invention, 2 are provided on the lower capping plate of riser at different levels in addition to first order riser
~3 circular holes, for the drop coalesced in riser to be discharged, Circularhole diameter is preferably 5~10mm.
In the multistage defogging equipment of the present invention, the outer barrel is the combination of cylinder or cone cylinder or the two, and outer barrel is divided into
Lower two sections, the diameter D in any section of hypomere outer barrel is 1.1-2 times of the nearest draft tube diameter d of distance on the section, preferably
1.3-1.5 again;Epimere outer barrel is preferably taper, and diameter D is 1.5-6 times, preferably 2-3 times of first order draft tube diameter d1.
Upper edge the certain distance P, distance P that the upper edge of outer barrel is higher by outermost layer riser are outermost layer riser outlet rectification channel height
1~8 times, preferably 2~5 times.The lower edge of outer barrel has certain distance C apart from tower tray, and whole less than first order riser outlet
The lower edge of circulation road, distance C are 5~100mm, preferably 20~50mm.The overall height H of outer barrel is that first order riser outlet is whole
2~20 times of flow channel height, preferably 4~10 times.
In the multistage defogging equipment of the present invention, the inner surface setting groove or protrusion of the outer barrel.Groove or protrusion with
The axis of outer barrel is parallel, or can form an angle with axis.The section of the groove or protrusion can also be rectangle, three
The suitable shapes such as angular or round.
In the multistage defogging equipment of the present invention, the inner surface of the outer barrel is preferably provided with cross sectional shape as shown in FIG. 6
Groove, the section of the groove is made of a circular arc and straight line section;The wherein intersection point of circular arc and outer tube inner surface circumference
The tangent line of circular arc and circumference is done respectively, and the angle between tangent line is α, and α is 5 ° ~ 70 °, preferably 10 ° ~ 40 °;Circular arc and straightway
The tangent line of the circular arc done at intersection point and the angle of straightway are β, and β is 30 ° ~ 110 °, preferably 45 ° ~ 90 °.The depth of groove
Z, i.e. circular arc are 0.1 ~ 0.7 times of outer barrel wall thickness with the shortest distance on straightway intersection point to outer tube inner surface circumference, preferably
0.3 ~ 0.5 times;Arc length between the intersection point and straightway and the intersection point of outer tube inner surface circumference of circular arc and outer tube inner surface circumference is
The 1/80 ~ 1/6 of outer tube inner surface circumference.
In the multistage defogging equipment of the present invention, the outer barrel, riser, upper capping plate and the lower thickness for covering plate are excellent
Phase selection is same.
In the multistage defogging equipment of the present invention, toothing or waveform can also be arranged in the lower ending opening of the outer barrel
Structure 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 multistage defogging equipment of the present invention ensures sealing, does not generate gas leak phenomenon.
The multistage defogging equipment of the present invention, when work, the air inlet rectification channel of gas from the tower tray lower end of entrained drip is straight
It connects and tangentially horizontally enters into first order riser, partial drop collides with air inlet rectification vias inner walls, keeps some small
Drop adheres to and coalescence in air inlet rectification vias inner walls, and the drop of attachment becomes larger, a part of larger drop its own
The gravity of generation be more than gas climbing power and surface tension of liquid resultant force when, drop will be under the surface of air inlet rectification channel
It falls to be detached, completes first time gas-liquid separation;The larger drop of another part then continues to flow with gas, along
The rotation of draft tube inner wall flows up, and encounters gas phase flow direction after covering plate in the first order and changes again, part is small
Drop and capping plate collision in the first order, and then complete second of gas-liquid separation;There is part droplet coalescence to become again simultaneously
Larger drop, and continue to flow with gas, the gas of entrained drip enters first order riser along horizontal or level of approximation direction
First order outlet rectification channel, since there are certain length, and first order outlet rectification channel in first order outlet rectification channel
Total sectional area is less than riser cross-sectional area, the gas of the more dispersed entrained drip of script directional velocity, into the first order
Behind outlet rectification channel, directional velocity is changed to the direction along first order outlet rectification channel, directional velocity comparison rule sum aggregate
In, and since circulation area reduces, speed increases after so that the gas of entrained drip is entered first order outlet rectification channel, carries liquid secretly
When the directional velocity of the gas of drop changes, partial drop collides with first order outlet rectification vias inner walls, and is attached to the
In level-one outlet rectification vias inner walls, and then the gas for constantly being flowed through first order outlet rectification channel blows out and falls, and completes
Third time gas-liquid separation.Meanwhile in first order outlet rectification channel, since the gas velocity direction of entrained drip changes, portion
Droplet is divided to issue raw mutually collision in inertia force effect, droplet aggregation is as big drop, and the gas of entrained drip flows through
Speed increases when first order outlet rectification channel, exacerbates the movement of drop, improves the probability that droplet mutually collides, make small
Drop, which is easier to assemble, becomes big drop, and with gas with larger speed outflow first order outlet rectification channel.Entrainment
The gas of drop enters second level riser after being flowed out from first order outlet rectification channel, and occurs with second level riser inner wall
It collides, then gas flows through second level outlet rectification channel and enters third level riser, and gas is in each riser periodically
Movement is finally flowed out from the outlet rectification channel of outermost layer riser, and enters outer barrel, during which gas motion feelings in each riser
Condition and demisting principle are identical.The gas of the entrained drip flowed out from outermost layer riser outlet 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 outermost layer riser outlet rectification channel direction by being changed to along outer tube inner wall
Circumferencial direction flows, and is rotated to upstream since the gas velocity of entrained drip is larger, and along reeded outer tube inner wall is opened up
It is dynamic, therefore will produce obvious shaving effect.The shaving effect refers to the high-speed gas of entrained drip along outer barrel
When wall rotation flows up, drop is constantly thrown toward outer under the action of inertia force, and drop enters groove and along groove
Arc section moves, and since angle α is 5 ° ~ 70 °, the arc surface that drop continues on groove can be made to do and smoothly move, drop
Between contact aggregation become larger, until encountering that straightway is hindered, assemble the drop to become larger and hit strongly with straightway wall surface, and is attached
It on the straightway of outer barrel inboard wall groove, drop continues to assemble and become larger, and then goes downstream along outer tube inner wall;And gas is then
Continue that high speed is kept to flow up along outer tube inner wall rotation, realizes gas-liquid separation again, and reduce entrainment.It is logical
Above-mentioned rectification, acceleration and shaving effect are crossed, so that fluid is realized the separation of drop and gas in flow process, is particularly suitable for gas
Body flow is larger and demisting requires relatively high occasion.
Application of the multistage defogging equipment of the present invention in the absorption tower using wet desulfurizing process, generally enters the first order
The gas velocity of riser is 3-20m/s, and the gas velocity of the outlet rectification channel outlet of outermost layer riser is 10-40m/s, outermost layer liter
The gas velocity of the outlet rectification channel outlet of tracheae is into 1.5 ~ 3 times of gas velocity of first order riser.
Compared with prior art, multistage defogging equipment of the invention has the following advantages:
1, there is lower capping plate in first order riser lower end, and lower circumferential direction is evenly arranged with several first order air inlet rectifications and leads to
Road makes gas directly tangentially enter first order riser, enhances eddy flow effect, completes in the process for the first time
Gas-liquid separation, while the larger drop of a part of coalescence being made to continue to flow with gas, and it is upward along the rotation of riser inner wall
Flowing.
2, riser upper ends at different levels are equipped with outlet rectification channel, and there are certain length, script speed side in outlet rectification channel
To the gas of more dispersed entrained drip, after entering outlet rectification channel, directional velocity is changed to along outlet rectification channel
Direction, directional velocity comparison rule and concentration;And outlet rectification channel total sectional area is less than riser cross-sectional area, due to stream
Logical area reduces, and speed increases after so that the gas of entrained drip is entered outlet rectification channel.
3, multistage riser is used in combination, and improves demisting efficiency, is particularly suitable for that gas flow is larger and demisting requirement
Relatively high occasion.
4, the section of cylinder inner surface groove is made of a circular arc and straight line section, the high-speed gas edge of entrained drip
When outer tube inner wall rotation flows up, drop is constantly thrown toward outer under the action of inertia force, and drop enters groove and along recessed
Arc section movement in slot can make the arc surface that drop continues on groove do smooth fortune since angle α is 5 ° ~ 70 °
It is dynamic, until encounter straightway it is hindered after go downstream along outer tube inner wall, and exist without dead zone.
5, by multistage demisting, efficiently achieve the effect that demisting, effectively remove the smaller liquid of the grain size carried secretly in gas
Drop, demisting efficiency is high, reduces the harm to environment, plays the role of environmental protection.
6, gas flow uniform, flow resistance is small, and resistance reduces.
7, simple in structure, it is easy to make, it is not easy to plug and fouling, without backwash.
8, 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 multistage defogging equipment structure one of the present invention(Three-level riser is set)Schematic diagram.
Fig. 2 is the multistage defogging equipment structure two of the present invention(Three-level riser is set)Schematic diagram.
Fig. 3 is the schematic cross-section in air inlet rectification channel.
Fig. 4 is the schematic cross-section for the multistage defogging equipment that outlet rectification channel is flushed with inner wall.
Fig. 5 is the schematic cross-section for the multistage defogging equipment that un-obstructed draft tube interior is stretched into outlet rectification channel.
Fig. 6 is that section is the groove schematic diagram that circular arc and straightway are constituted.
In figure respectively label for:1-air inlet rectification channel;Plate is covered under 2-;3- riseies;4- outlet rectifications channel;On 5-
Cover plate;6- outer barrels;7-tower trays, 8-grooves or protrusion.
Wherein, plate is covered under 2-1-level-one;Plate is covered under 2-2-second level;Plate is covered under 2-3-third level;3-1—
First order riser;3-2-two level riser;3-3-third level riser;4-1-first order outlet rectification channel;4-2—
Second level outlet rectification channel;4-3-third level outlet rectification channel;Plate is covered in 5-1-first order;On 5-2-second level
Cover plate;Plate is covered on 5-3-third level;6-1-outer barrel hypomere;6-2-outer barrel epimere.
Specific implementation mode
The multistage defogging equipment of the present invention is described in further detail with reference to the accompanying drawings and examples.To be arranged three
Grade riser illustrates, but is not intended to limit the present invention.
The multistage defogging equipment of the present invention includes several demisting components arranged side by side, and each demisting component includes multistage rises
Tracheae 3 and an outer barrel 6, multistage riser are that increased coaxial riser, multistage rise gas to several calibers step by step from inside to outside
Pipe is at least 2 grades, and preferably 2 ~ 5 grades, increasing proportion is 1.1 ~ 1.8 times to riser calibers at different levels step by step, and preferably equal proportion is incremented by;
Outer barrel 6 is arranged in the outside of multistage riser 3, on the same axis with riser 3;The innermost layer of multistage riser 3 is first
Grade 3-1, the top of riseies at different levels increase step by step from inside to outside, and capping plate 5, first order liter are respectively provided at the top of riseies at different levels
Tracheae 3-1 is fixed on tower tray 7, and bottom is less than 7 certain distance of tower tray, remaining riser bottom at different levels and first order riser
3-1 is fixedly connected in 7 or more somewhere of tower tray, and riser bottoms at different levels are respectively provided with lower capping plate 2;First order riser 3-1 is in tower
Disk 7 is to be uniformly arranged several air inlet rectifications channel 1 on the circumference of lower part, air inlet rectification channel 1 is outside first order riser 3-1
The tangential direction level of wall is embedded in, side wall I and first order riser 3-1 tube wall phase of the air inlet rectification channel 1 close to 6 side of outer barrel
It cuts, another side wall II intersects with first order riser 3-1 tube walls, and 1 direction of rotation of each air inlet rectification channel is identical, and air inlet rectification is logical
1 bottom of road is flushed with the lower capping plate 2-1 of first order riser 3-1, and top is intersected with first order riser 3-1 tube walls;It is at different levels
Several outlet rectifications channel 4 is uniformly arranged on the circumference of riser upper end respectively, the outlet rectification channel 4 of riseies at different levels is along a liter gas
3 outer wall tangential direction level of pipe is embedded in, the side wall I and riser of the outlet rectification channels 4 of riseies at different levels close to 6 side of outer barrel
Tube wall is tangent, and another side wall II intersects with riser tube wall, and 4 direction of rotation of outlet rectification channel of riseies at different levels is with first
1 direction of rotation of air inlet rectification channel of grade riser 3-1 is identical, 4 top of outlet rectification channel of riseies at different levels and riser
Upper capping plate 5 flush, bottom is intersected with the tube wall of riser.
In the multistage defogging equipment of the present invention, the outlet rectification channel 4 of the riseies at different levels is arranged 1 ~ 12, preferably 4-
8, the wall thickness in the outlet rectification channel 4 of riseies at different levels is preferably identical as the wall thickness of riser;Outlet on riseies at different levels
4 number of rectification channel can be the same or different.
In the multistage defogging equipment of the present invention, the length l in 4 channel of outlet rectification is the length of 4 side wall II of outlet rectification channel
Degree, maximum horizontal ranges of the width w between 4 two side of outlet rectification channel, height h are 4 top and bottom of outlet rectification channel
Between maximum normal distance;Wherein length l is 2 ~ 5 times, preferably 3 ~ 4 times of width w;The cross sectional shape in outlet rectification channel 4
For rectangle, ellipse, circle, trapezoidal or one or more of semicircle etc. combination, in preferably rectangular, oval or circle
One or more combination.The size in the outlet rectification channel 4 of riseies at different levels is according to actual operating mode or design requirement, by this
Field technology personnel are determined.In general, the width w and length l in the outlet rectification channel 4 of riseies at different levels should be not brush up against
The tube wall of next stage riser is limited, and the length l in the outlet rectification channel of riseies at different levels is preferably incremented by step by step from inside to outside, passs
Increasing ratio is 1.1~1.8 times.The total sectional area in outlet rectification channel 4 is the 0.2 ~ 0.9 of first order riser 3-1 cross-sectional areas
Times, preferably 0.3 ~ 0.6 times of first order riser 3-1 cross-sectional areas.
In the multistage defogging equipment of the present invention, the ends side wall II in the outlet rectification channel 4 can in riser
It is 0.1 ~ 0.9 times, preferably 0.3 ~ 0.6 times of length l that wall, which flushes or extend into un-obstructed draft tube interior certain distance m, m,.Work as outlet
When the ends side wall II in rectification channel 4 are flushed with riser inner wall, 4 bottom end of outlet rectification channel is also neat with riser inner wall
It is flat;When the side wall II in outlet rectification channel 4 extend into un-obstructed draft tube interior certain distance m, 4 bottom end of outlet rectification channel with
Side wall end flushes.
In the multistage defogging equipment of the present invention, the outlet rectification channel 4-1 distances from bottom tower tray 7 of first order riser 3-1
It is 20~200mm, preferably 40~80mm, 4 bottom of outlet rectification channel of remaining riser at different levels to have certain distance A, distance A
The slightly above upper capping plate 5 of previous stage riser.
In the multistage defogging equipment of the present invention, the lower capping plate 2-1 of first order riser 3-1 has certain distance away from tower tray 7
B, distance B are 1.1~3 times, preferably 1.5~2 times of 1 height of air inlet rectification channel.The lower capping plate of second level riser 3-2
2-2 is less than the outlet rectification channel bottoms the 4-1 certain distance of first order riser 3-1, distance preferably 10~50mm.Remaining is each
The lower capping plate of grade riser can be concordant with the lower capping plate of second level riser, or is less than going out for previous stage riser successively
Gas rectification the bottom of the channel certain distance, preferably 10~50mm.
In the multistage defogging equipment of the present invention, the distance between the upper capping plate 5 of riseies at different levels and lower capping plate 2 are each
The height of grade riser.
In the multistage defogging equipment of the present invention, the generally setting 1 ~ 12 of air inlet rectification channel 1, preferably 2-6.Air inlet rectification
The wall thickness in channel 1 is preferably identical as the wall thickness of riser.
In the multistage defogging equipment of the present invention, the length e in air inlet rectification channel 1 is the length of side wall II, and width f is air inlet
Maximum horizontal range between 1 two side of rectification channel, height g be maximum perpendicular between the top and bottom of air inlet rectification channel 1 away from
From;Wherein length e is 1 ~ 3 times, preferably 1.2 ~ 2 times of width f;The cross sectional shape in air inlet rectification channel 1 is rectangle, ellipse
Shape, circle, trapezoidal or one or more of semicircle etc. combination, one kind or several in preferably rectangular, oval or circle
Kind combination;The total sectional area in air inlet rectification channel 1 is identical as 3 cross-sectional area of riser.The size in air inlet rectification channel 1 is according to reality
The operating mode or design requirement on border, are determined by those skilled in the art, the ends side wall II in air inlet rectification channel 1 and riser
3 inner walls flush.
In the multistage defogging equipment of the present invention, 1 top of air inlet rectification channel is less than 7 a distance B of tower tray, and air inlet rectification is logical
1 bottom of road is concordant with lower capping plate 2;The number in air inlet rectification channel 1 and the number in outlet rectification channel 4 can it is identical can also
It is different.
In the multistage defogging equipment of the present invention, first order riser 3-1 and 7 airtight connection of tower tray, first order riser 3-1
Diameter and the percent opening of tower tray 7 can be determined by those skilled in the art according to actual operating mode or design requirement.
The present invention multistage defogging equipment in, the air inlet rectification channel 1, outlet rectification channel 4, upper capping plate 5, under
Capping plate 2 can weld together with riser 3 or global formation.
In the multistage defogging equipment of the present invention, opened on the lower capping plate 2 of riseies at different levels in addition to first order riser 3-1
There are 2~3 circular holes, for the drop coalesced in riser 3 to be discharged, Circularhole diameter is preferably 5~10mm.
In the multistage defogging equipment of the present invention, the outer barrel 6 is the combination of cylinder or cone cylinder or the two, and outer barrel 6, which divides, is
Two sections, the diameter D in any sections hypomere outer barrel 6-1 are 1.1-2 times of the nearest 3 diameter d of riser of distance on the section,
Preferably 1.3-1.5 times;Epimere outer barrel 6-2 is preferably taper, and diameter D is 1.5-6 times of first order riser 3-1 diameters d1,
Preferably 2-3 times.Upper edge the certain distance P, distance P that the upper edge of outer barrel 6 is higher by outermost layer riser 3 are that outermost layer riser goes out
1~8 times of 4 height of gas rectification channel, preferably 2~5 times.The lower edge of outer barrel 6 has a certain distance C apart from tower tray 7, and less than the
The lower edge in draft tube 3-1 outlet rectifications channel, distance C are 5~100mm, preferably 20~50mm.The overall height H of outer barrel 6
It is 2~20 times, preferably 4~10 times of first order riser 3-1 outlet rectifications channel 4-1 height.
In the multistage defogging equipment of the present invention, the inner surface setting groove or protrusion 8 of the outer barrel 6.Groove is 8 convex
It is parallel with the axis of outer barrel 6, or can form an angle with axis.The section of the groove or protrusion 8 can also be square
The suitable shapes such as shape, triangle or circle.
In the multistage defogging equipment of the present invention, the inner surface of the outer barrel 6 is preferably provided with cross sectional shape as shown in FIG. 6
Groove 8, the section of the groove 8 is made of a circular arc and straight line section;The wherein friendship of circular arc and 6 inner surface circumference of outer barrel
Point does the tangent line of circular arc and circumference respectively, and the angle between tangent line is α, and α is 5 ° ~ 70 °, preferably 10 ° ~ 40 °;Circular arc and straight line
The tangent line of circular arc and the angle of straightway done at section intersection point is β, and β is 30 ° ~ 110 °, preferably 45 ° ~ 90 °.The depth of groove 8
Z is spent, i.e., circular arc and the shortest distance on straightway intersection point to 6 inner surface circumference of outer barrel are 0.1 ~ 0.7 times of 6 wall thickness of outer barrel, excellent
It is selected as 0.3 ~ 0.5 times;Between the intersection point of the 6 inner surface circumference of intersection point and straightway and outer barrel of 6 inner surface circumference of circular arc and outer barrel
Arc length is the 1/80 ~ 1/6 of 6 inner surface circumference of outer barrel.
Embodiment one
Certain wet scrubber tower purifying smoke 100000Nm3/ h, wherein aobvious water concentration is 10~15g/Nm3, after demisting of the present invention
Shui Nongdu < is shown in exhaust;0.5g/Nm3, demisting efficiency >=95%.
Claims (10)
1. a kind of multistage defogging equipment, including several demisting components arranged side by side, it is characterised in that:Each demisting component includes
Multistage riser and an outer barrel, multistage riser is several calibers increased coaxial riser step by step from inside to outside, multistage
Riser is at least 2 grades, and increasing proportion is 1.1 ~ 1.8 times to riser calibers at different levels step by step;Outer barrel is arranged in multistage riser
Outside, on the same axis with riser;The innermost layer riser of multistage riser is first order riser, riseies at different levels
Top increases step by step from inside to outside, and capping plate is respectively provided at the top of riseies at different levels, and first order riser is fixed on tower tray, and
Bottom is less than tower tray certain distance, remaining riser bottom at different levels is fixedly connected with first order riser in the above somewhere of tower tray,
Riser bottoms at different levels are respectively provided with lower capping plate;First order riser be uniformly arranged on the circumference of lower part in tower tray it is several into
Gas rectification channel, air inlet rectification channel are embedded in along the tangential direction level of first order riser outer wall, and air inlet rectification channel is close
The side wall I of outer barrel side and first order riser tube wall are tangent, and another side wall II intersects with first order riser tube wall, each air inlet
Rectification channel direction of rotation is identical, and air inlet rectification the bottom of the channel is flushed with the lower capping plate of first order riser, top and first
Grade riser tube wall intersection;Several outlet rectifications channel, riseies at different levels are uniformly arranged on the circumference of riser upper ends at different levels respectively
Outlet rectification channel along riser outer wall tangential direction level be embedded in, the outlet rectification channel of riseies at different levels is close to outer barrel one
The side wall I and riser tube wall of side are tangent, and another side wall II intersects with riser tube wall, the outlet rectification channel of riseies at different levels
Direction of rotation is identical as the air inlet rectification channel direction of rotation of first order riser, the outlet rectification channel top of riseies at different levels
Portion is flushed with the upper capping plate of riser, and bottom is intersected with the tube wall of riser.
2. multistage defogging equipment described in accordance with the claim 1, it is characterised in that:The outlet rectification channel of the riser at different levels
Setting 1 ~ 12.
3. multistage defogging equipment described in accordance with the claim 1, it is characterised in that:The length l in outlet rectification channel is that outlet is whole
The length of circulation road side wall II, maximum horizontal ranges of the width w between the two side of outlet rectification channel, height h are outlet rectification
Maximum normal distance between channel roof and bottom;Wherein length l is 2 ~ 5 times of width w;The cross sectional shape in outlet rectification channel
For rectangle, ellipse, circle, trapezoidal or one or more of semicircle combination;The outlet rectification channel of riseies at different levels
Width w and length l is limited with the tube wall for not brushing up against next stage riser.
4. multistage defogging equipment described in accordance with the claim 1, it is characterised in that:The length in the outlet rectification channel of riseies at different levels
Degree is incremented by step by step from inside to outside, and increasing proportion is 1.1~1.8 times;The total sectional area in outlet rectification channel is first order riser
0.2 ~ 0.9 times of cross-sectional area.
5. multistage defogging equipment described in accordance with the claim 1, it is characterised in that:The ends side wall II in the outlet rectification channel
It is 0.1 ~ 0.9 times of length l that end, which can flush or extend into un-obstructed draft tube interior certain distance m, m with riser inner wall,;Work as outlet
When the ends side wall II in rectification channel are flushed with riser inner wall, outlet rectification the bottom of the channel end is also neat with riser inner wall
It is flat;When the side wall II in outlet rectification channel extend into un-obstructed draft tube interior certain distance m, outlet rectification the bottom of the channel end and side
Wall end flushes.
6. multistage defogging equipment described in accordance with the claim 1, it is characterised in that:The outlet rectification channel floor of first order riser
It is 20~200mm that there are certain distance A, distance A in portion apart from tower tray;The lower capping plate of first order riser has certain distance away from tower tray
B, distance B are 1.1~3 times of air inlet rectification channel height, and the lower capping plate of second level riser is less than first order riser
The lower capping plate of outlet rectification the bottom of the channel certain distance, remaining riser at different levels is concordant with the lower capping plate of second level riser
Or it is less than outlet rectification the bottom of the channel certain distance of previous stage riser successively.
7. multistage defogging equipment described in accordance with the claim 1, it is characterised in that:The generally setting 1 ~ 12 of air inlet rectification channel;
The length e in air inlet rectification channel be side wall II length, maximum horizontal ranges of the width f between the two side of air inlet rectification channel,
Maximum normal distances of the height g between air inlet rectification channel roof and bottom;Wherein length e is 1 ~ 3 times of width f;Air inlet is whole
The cross sectional shape of circulation road is rectangle, ellipse, circle, trapezoidal or one or more of semicircle combination;Air inlet rectification is logical
The total sectional area in road is identical as first order riser cross-sectional area.
8. multistage defogging equipment described in accordance with the claim 1, it is characterised in that:The outer barrel is cylinder or cone cylinder or the two
Combination, outer barrel is divided into two sections, and the diameter D in any section of hypomere outer barrel is the draft tube diameter that distance is nearest on the section
1.1-2 times of d;Epimere outer barrel is taper, and diameter D is 1.5-6 times of first order draft tube diameter d1;The upper edge of outer barrel is higher by most
Upper edge the certain distance P, distance P of outer layer riser are 1~8 times of outermost layer riser outlet rectification channel height;Outer barrel
Lower edge has certain distance C apart from tower tray, and less than the lower edge in first order riser outlet rectification channel, and distance C is 5~100mm;
The overall height H of outer barrel is 2~20 times of first order riser outlet rectification channel height.
9. multistage defogging equipment described in accordance with the claim 1, it is characterised in that:Groove is arranged in the inner surface of the outer barrel,
The section of the groove is made of a circular arc and straight line section;The intersection point of wherein circular arc and outer tube inner surface circumference does circle respectively
The tangent line of arc and circumference, the angle between tangent line are α, and α is 5 ° ~ 70 °;The tangent line of the circular arc done at circular arc and straightway intersection point
Angle with straightway is β, and β is 30 ° ~ 110 °;The depth Z of groove, i.e. circular arc and straightway intersection point to outer tube inner surface circumference
On the shortest distance be 0.1 ~ 0.7 times of outer barrel wall thickness;In the intersection point and straightway and outer barrel of circular arc and outer tube inner surface circumference
Arc length between the intersection point of surface perimeter is the 1/80 ~ 1/6 of outer tube inner surface circumference.
10. the multistage defogging equipment described in a kind of claim 1 ~ 9 any claim is in the absorption using wet desulfurizing process
Application in tower.
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| CN201710235060.5A CN108686431B (en) | 2017-04-12 | 2017-04-12 | Multistage defogging equipment |
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|---|---|---|---|
| CN201710235060.5A CN108686431B (en) | 2017-04-12 | 2017-04-12 | Multistage defogging equipment |
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| CN108686431B CN108686431B (en) | 2020-07-03 |
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