CN105169818B - Double-vane air-swirl parallel-combination demister and application thereof - Google Patents
Double-vane air-swirl parallel-combination demister and application thereof Download PDFInfo
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- CN105169818B CN105169818B CN201510447244.9A CN201510447244A CN105169818B CN 105169818 B CN105169818 B CN 105169818B CN 201510447244 A CN201510447244 A CN 201510447244A CN 105169818 B CN105169818 B CN 105169818B
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Abstract
The present invention relates to a double-vane air-swirl parallel-combination demister. The demister comprises one or more than two air-swirl demisting units and plugging plates, wherein a central axis of the air-swirl demisting unit is arranged in a vertical direction; and the air-swirl demisting unit comprises an outer barrel, a guide plate, an inner barrel, an outer guide vane, an inner guide vane, a sealing plate, a tapered section, an expanding section and a water drainage section. According to the demister disclosed by the invention, a working flow rate is increase and an ultimate grain size is reduced, so that the ultimate grain size of liquid drops captured by the demister is smaller than 15 microns, and therefore, effect of reducing the concentration of mist drops at an outlet of the demister is achieved, water loss is avoided, and secondary pollution to air is also avoided.
Description
Technical field
The invention belongs to environmental technology field, relate to the flue gas demister of absorption tower outlet in Wet Flue Gas Desulfurization Technology
And application, especially a kind of bilobate air swirl parallel combination demister and application.
Background technology
In flue gas desulfurization technique, desulfurization technology in a wet process is most widely used.Its nucleus equipment is absorption tower, through inhaling
Receive the flue gas after tower washing, can be with substantial amounts of drop, with fume emission.This had both caused the loss of a large amount of water, meanwhile, in water
The particulate matter dissolved and suspend also can together enter air, causes the secondary pollution of air.
In order to reduce the discharge of drop, prior art means are to install demister additional at top, absorption tower.Existing demister with
Flap form is in the majority, and it is preferable except fog effect, and limit grain diameter can reach 25 microns.Because it is restricted by reentrainment,
Its operating rate can not be too high, therefore thinks to reduce its limit grain diameter further the most difficult.
If it is desired to improve further except fog effect, reduce limit grain diameter, need to be processed by combinatorial principle, further
Improve flowing velocity.
By retrieval, not yet find the patent publication us relevant to present patent application.
Summary of the invention
In place of it is an object of the invention to overcome the deficiencies in the prior art, it is provided that a kind of new demister form, utilize gas
Dynamic eddy flow principle work, improves working flow rate, reduces limit grain diameter, thus reduces demister outlet droplet concentration
The bilobate air swirl parallel combination demister of effect and application, after this device can apply to remove wet process of FGD
In the aspect of free state drop contained in flue gas.
It is an object of the invention to be achieved through the following technical solutions:
A kind of bilobate air swirl parallel combination demister, described device includes one or more air swirl
Demisting unit and plugging plate, the axis of described air swirl demisting unit is that vertical direction is arranged；
When described air swirl demisting unit is one, the top of this air swirl demisting unit and the outer rim of bottom all connect
It is equipped with plugging plate；
When described air swirl demisting unit is two or more, this air swirl demisting unit in same level in also
Row interval is arranged, and the parallel setting in axis of each air swirl unit, between each air swirl demisting unit
Bottom is all sealed connected together by plugging plate with top, mutually in top and the bottom of outermost air swirl demisting unit
Outer rim be all connected with being provided with plugging plate.
And, described air swirl demisting unit includes outer cylinder body, deflector, inner barrel, outer stator, interior stator, sealing
Plate, converging transition, flow-expanding section and draining section, outside described deflector, inner barrel, converging transition and flow-expanding section are set in turn in from the bottom to top
In cylinder, described inner barrel is coaxially disposed with outer cylinder body, and described draining section is coaxially disposed on the outer cylinder body above flow-expanding section, institute
State the bottom that deflector is inclined and mounted in outer cylinder body；
Described interior stator is arranged in inner barrel, is made up of multiple plane blades, and multiple plane blades are with in inner barrel
The circularly symmetric layout of mandrel line, each plane blade all has angle with horizontal direction, transversal at inner barrel of each plane blade
Whole cross section can all be covered by face direction projection, and has overlap；
Described outer stator is arranged between outer cylinder body and inner barrel, is made up of multiple outer stator plane blades, with outer cylinder body
The circularly symmetric layout of central axis, each outer stator plane blade all has angle, each outer stator plane leaf with horizontal direction
Sheet projects can all be covered by the cross section between whole inner barrel and outer cylinder body in the cross-sectional direction of outer cylinder body, and has
Overlapping；
Described sealing plate is flat board or curved slab, is arranged at the axle center of interior stator, sealing plate can make interior stator around
Sealing plate forms the uniform setting that circle is symmetrical；
Described converging transition is taper pipe, is coaxially disposed with outer cylinder body, converging transition reduced diameter from bottom to top, bottom
Linking together with outer cylinder body inner wall smooth, the diameter of bottom is identical with the diameter of outer cylinder body, the diameter at top and flow-expanding section
Diameter is identical；
Described flow-expanding section is taper pipe, is coaxially disposed with outer cylinder body, and flow-expanding section diameter from bottom to top is gradually increased, top
Linking together with outer cylinder body inner wall smooth, the diameter at top is identical with the diameter of outer cylinder body, the diameter of bottom and converging transition
Top diameter is identical, and the straight tube 7 being coaxially disposed with outer cylinder body by between described converging transition and flow-expanding section links together；
Arranging draining section on the outer cylinder body of the lower section at nearly outer cylinder body top, described draining section includes grade water annulus and catchments
Groove, the inner end of described shelves water annulus is coaxially disposed in outer cylinder body inwall, the shelves water annulus that this is located in outer cylinder body inwall
The transverse section of inner end is inversed l-shaped, and the outer end of this grade of water annulus is inclined upwardly extension through outer cylinder body inwall from inner end
Outside outer cylinder body, outside outer cylinder body, form the bent angle of arc transition and bend towards vertically downward direction, the side of shelves water annulus
Be connected setting with outer cylinder body, and opposite side and the outer cylinder body interval of the shelves water annulus arranged that should be connected with outer cylinder body are arranged, if
Being coaxially provided with water leg with outer cylinder body below the shelves water annulus being placed in outside outer cylinder body, the diameter of this water leg is more than outside outer cylinder body
The maximum gauge of shelves water annulus, this water leg is for collecting the drop flow down on the shelves water annulus outside outer cylinder body, this water leg
It is provided with drainage arrangement, discharges for the liquid will collected in water leg.
And, described outer cylinder body or inner barrel are straight bucket circular tube structure, a length of 500mm to 3000mm of outer cylinder body, internal diameter
For 100mm to 1000mm；Or, a length of 200mm to 500mm of inner barrel, internal diameter is 50mm to 500mm；Or, described urceolus
Body and/or inner barrel use the material that coefficient of friction is low.
And, the material that described coefficient of friction is low is plastic.
And, described water leg is provided with drainage arrangement for arrange osculum or drain pipe on water leg.
And, described in be sequentially connected connect the outer guide card of setting, interior guide card, sealing plate, deflector, converging transition, flow-expanding section, row
Water section arranges one or more layers, forms arranged in series.
And, described bilobate air swirl parallel combination demister is arranged in the equipment of wet process of FGD.
And, described bilobate air swirl parallel combination demister is arranged in flue gas desulfurization device absorptive tower or installs
Behind absorption tower in single device.
Institute in the bilobate air swirl parallel combination demister as above flue gas after removing wet process of FGD
Application in the aspect of the free state drop contained.
Advantages of the present invention and good effect be:
1, apparatus of the present invention make use of the principle of inertial separation, under certain operating rate, makes droplet at inertial centrifugal
Under the effect of power to barrel flow, compare traditional flap demister, due to the fact that its flowing velocity by axially translated for portion
Cut to, thus entirety adds its working flow rate, and makes axial velocity be unlikely to too high.Therefore, the liquid by this device is made
Drip limit grain diameter to reduce, it is possible to make the limit grain diameter of device trapping drop be less than 15 microns, thus reached to reduce except mist
The effect of device outlet droplet concentration, it is to avoid the loss of water, meanwhile, it also avoid the secondary pollution causing air.
2, apparatus of the present invention due to its flowing velocity higher, bucket inner surface formed uniform water film, therefore this device is to cleaning
Less demanding, relatively conventional chevron mist eliminator, reduce the intensity of flushing water, saved the energy.
3, apparatus of the present invention are owing to increasing element diameter, add the tangential flow velocity of urceolus, make except fog effect is brighter
Aobvious.
Accompanying drawing explanation
Fig. 1 is that the structure of bilobate air swirl parallel combination device of the present invention connects partial sectional view；
Fig. 2 is that the structure of air swirl demisting unit in Fig. 1 connects enlarged diagram；
Fig. 3 be Fig. 2 China and foreign countries stator, interior stator and sealing plate structure connecting shaft side schematic diagram.
Detailed description of the invention
As a example by accompanying drawing embodiment, the invention will be further described below, and following example are illustrative, no
It is determinate, it is impossible to limit protection scope of the present invention with this.
Structure, annexation and the method not described in detail in patent of the present invention, all can be understood as the public affairs in this area
Know general knowledge.
A kind of bilobate air swirl parallel combination demister, as it is shown in figure 1, this device includes one or more
Air swirl demisting unit 2 and plugging plate 1, the axis of described air swirl demisting unit is that vertical direction is arranged；
When described air swirl demisting unit is one, the top of this air swirl demisting unit and the outer rim of bottom all connect
Being equipped with plugging plate, air swirl demisting unit can be by the inwall phase of this plugging plate with the reaction unit 3 installing this device
It is sealingly mounted at together, the closure of space between air swirl unit and inwall, make the flue gas can only be from bottom to up from bilobate gas
Dynamic swirling flow unit outer barrel passes through；
When described air swirl demisting unit is two or more, this air swirl demisting unit in same level in also
Row interval is arranged, and the parallel setting in axis of each air swirl unit, between each air swirl demisting unit
Bottom is all sealed connected together by plugging plate with top, mutually in top and the bottom of outermost air swirl demisting unit
Outer rim be all connected with being provided with plugging plate, outermost air swirl demisting unit can by plugging plate with installation this device anti-
The inwall answering device is sealingly mounted at together mutually, between air swirl unit and and inwall between space closure, make the flue gas can only
Pass through from bilobate air swirl unit outer barrel from bottom to up.
As in figure 2 it is shown, described air swirl demisting unit include outer cylinder body 4, deflector 11, inner barrel 9, outer stator 10,
Interior stator 12, sealing plate 13, converging transition 8, flow-expanding section 6 and draining section 5, described deflector, inner barrel, converging transition and flow-expanding section by
Under supreme be set in turn in outer cylinder body, described inner barrel is coaxially disposed with outer cylinder body, and described draining section is coaxially disposed in expanding stream
On the outer cylinder body of Duan Shangfang, described deflector is inclined and mounted on the bottom in outer cylinder body, and this deflector is to entering interior stator with outer
The air-flow of stator carries out rectification；
As it is shown on figure 3, described interior stator is arranged in inner barrel, it is made up of multiple plane blades (non-label in figure), many
Individual plane blade is with the circularly symmetric layout of central axis of inner barrel, and each plane blade all has angle with horizontal direction, each
Plane blade projects can all be covered by whole cross section in the cross-sectional direction of inner barrel, and has overlap；
As it is shown on figure 3, described outer stator is arranged between outer cylinder body and inner barrel, by multiple outer stator plane blades (figure
In non-label) composition, with the circularly symmetric layout of the central axis of outer cylinder body, each outer stator plane blade all has with horizontal direction
Angle, each outer stator plane blade can be by between whole inner barrel and outer cylinder body in the cross-sectional direction projection of outer cylinder body
Cross section all covers, and has overlap；
Described sealing plate is flat board or curved slab, is arranged at the axle center of interior stator, sealing plate can make interior stator around
Sealing plate forms the uniform setting that circle is symmetrical；
Described converging transition is taper pipe, is coaxially disposed with outer cylinder body, converging transition reduced diameter from bottom to top, bottom
Linking together with outer cylinder body inner wall smooth, the diameter of bottom is identical with the diameter of outer cylinder body, the diameter at top and flow-expanding section
Diameter is identical；
Described flow-expanding section is taper pipe, is coaxially disposed with outer cylinder body, and flow-expanding section diameter from bottom to top is gradually increased, top
Linking together with outer cylinder body inner wall smooth, the diameter at top is identical with the diameter of outer cylinder body, the diameter of bottom and converging transition
Top diameter is identical, and the straight tube 7 being coaxially disposed with outer cylinder body by between described converging transition and flow-expanding section links together；
Arranging draining section on the outer cylinder body of the lower section at nearly outer cylinder body top, described draining section includes that grade water annulus is (in figure
Non-label) and water leg 14, the inner end 17 of described shelves water annulus is coaxially disposed in outer cylinder body inwall, and this is located in outer cylinder body
The transverse section of the inner end of the shelves water annulus in wall is inversed l-shaped, and the outer end 15 of this grade of water annulus passes urceolus from inner end
Internal wall is inclined upwardly and extends to outside outer cylinder body, forms the bent angle 16 of arc transition and bend towards straight down outside outer cylinder body
Direction, the side of shelves water annulus is connected with outer cylinder body setting, the opposite side of the shelves water annulus arranged that should be connected with outer cylinder body
And outer cylinder body interval is arranged, and is coaxially provided with water leg with outer cylinder body, this water leg below the shelves water annulus being arranged at outside outer cylinder body
Diameter more than the maximum gauge of the shelves water annulus outside outer cylinder body, this water leg is upper for collecting the shelves water annulus outside outer cylinder body
The drop got off, this water leg is provided with drainage arrangement, discharges, such as on water leg for the liquid will collected in water leg
Osculum or drain pipe are set.
In the present embodiment, described outer cylinder body or inner barrel are straight bucket circular tube structure, and a length of 500mm of outer cylinder body is extremely
3000mm, internal diameter is 100mm to 1000mm；Or, a length of 200mm to 500mm of inner barrel, internal diameter is 50mm to 500mm；Or
Person, described outer cylinder body and/or inner barrel use the material that coefficient of friction is low, and such as plastic, such anti-adhesive properties is good, reduce
The use of flushing water.
In the present embodiment, be sequentially connected described in connect the outer guide card of setting, interior guide card, sealing plate, deflector, converging transition,
Flow-expanding section, draining section all can arrange one or more layers, form arranged in series.
Bilobate air swirl parallel combination demister of the present invention can be modified according to the burden requirement of different operating, changes
Become element number, deflector arranges parameter, blade arranges parameter and quantity, sealing plate form, converging transition flow velocity etc., to reach not
Same load, different removal efficiencies and otherwise limit particle diameter purpose.
The using method of bilobate air swirl parallel combination demister of the present invention is as follows:
Bilobate air swirl of the present invention absorbs except mist parallel combination device can be installed on flue gas desulfurization device in use
Tower or after being arranged on absorption tower in the reaction unit of individually in device or individually deentrainment tower or similar functions, flue gas under
And upper flowing, this device is applied in the middle of the equipment of wet process of FGD, and effect is in the flue gas after removing wet process of FGD
Contained free state drop, apparatus of the present invention can make the limit grain diameter of device trapping drop less than 15 microns.
The operation principle of bilobate air swirl parallel combination demister of the present invention is as follows:
Processed flue gas flows into outer cylinder body and inner barrel from bottom to top, through the rectification of deflector, enters water conservancy diversion leaf
Lamella, enters in inner barrel by paracentral flue gas, and deep flue gas enters the region between inner barrel, outer cylinder body, point
Not through interior stator and outer stator, interior stator, outer stator effect under, flue gas formed spinning updraft, so make air-flow
Velocity attitude convert and form tangential velocity, make drop in air-flow obtain centrifugal force, move to barrel direction；
The center of interior stator, arranges sealing plate, sealing plate effect be close in stator central area, be allowed to flow field
It is more conducive to gas-liquid separation；
Swirling eddy moves upward, and enters converging transition and flow-expanding section, and air-flow latus rectum reduces, and flue gas flow rate is accelerated, and makes drop
Separating effect improves, and makes some droplets produce and gather, and is combined into the drop of big particle diameter, thus is easier to by follow-up removing.
Through above step, major part drop has been removed, if according to the requirement of removal efficiency, it is impossible to meet needs, the most permissible
Increase some groups of inner barrels, outer stator, interior stator, sealing plate, deflector, converging transition, flow-expanding section.At cylinder close to top exit
Position, arranges draining section, and water leg has drainage arrangement, it is possible to discharged by liquid therein.
Air swirl demister, can be modified according to the burden requirement of different operating, changes element number, deflector
Arrange parameter, blade arranges parameter and quantity, sealing plate form, converging transition flow velocity etc., to reach different load, and different removing effects
Rate and otherwise limit particle diameter purpose.
Claims (7)
1. a bilobate air swirl parallel combination demister, it is characterised in that: described device includes one or more
Air swirl demisting unit and plugging plate, the axis of described air swirl demisting unit be vertical direction arrange；
When described air swirl demisting unit is one, the top of this air swirl demisting unit and the outer rim of bottom are all connected with setting
There is plugging plate；
When described air swirl demisting unit is two or more, this air swirl demisting unit in same level between side by side
Every setting, the parallel setting in axis of each air swirl unit, the bottom between each air swirl demisting unit
All it is sealed connected together mutually by plugging plate with top, outside the top and bottom of outermost air swirl demisting unit
Edge is all connected with being provided with plugging plate；
Described air swirl demisting unit include outer cylinder body, deflector, inner barrel, outer stator, interior stator, sealing plate, converging transition,
Flow-expanding section and draining section, described deflector, inner barrel, converging transition and flow-expanding section be set in turn in outer cylinder body from the bottom to top, institute
Stating inner barrel to be coaxially disposed with outer cylinder body, described draining section is coaxially disposed on the outer cylinder body above flow-expanding section, described deflector
The bottom being inclined and mounted in outer cylinder body；
Described interior stator is arranged in inner barrel, is made up of multiple plane blades, and multiple plane blades are with the central shaft of inner barrel
The circularly symmetric layout of line, each plane blade all has angle with horizontal direction, and each plane blade is in the cross section side of inner barrel
Whole cross section all can be covered to projection, and have overlap；
Described outer stator is arranged between outer cylinder body and inner barrel, is made up of multiple outer stator plane blades, with in outer cylinder body
The circularly symmetric layout of mandrel line, each outer stator plane blade all has angle, each outer stator plane blade to exist with horizontal direction
Cross section between whole inner barrel and outer cylinder body can all be covered by the cross-sectional direction projection of outer cylinder body, and has weight
Folded；
Described sealing plate is flat board or curved slab, is arranged at the axle center of interior stator, and sealing plate can make interior stator around sealing
Plate forms the uniform setting that circle is symmetrical；
Described converging transition is taper pipe, is coaxially disposed with outer cylinder body, converging transition reduced diameter from bottom to top, and bottom is with outer
Cylinder inboard wall is smoothly connected together, and the diameter of bottom is identical with the diameter of outer cylinder body, the diameter at top and the diameter of flow-expanding section
Identical；
Described flow-expanding section is taper pipe, is coaxially disposed with outer cylinder body, and flow-expanding section diameter from bottom to top is gradually increased, and top is with outer
Cylinder inboard wall is smoothly connected together, and the diameter at top is identical with the diameter of outer cylinder body, the diameter of bottom and the top of converging transition
Diameter is identical, and the straight tube being coaxially disposed with outer cylinder body by between described converging transition and flow-expanding section links together；
Arranging draining section on the outer cylinder body of the lower section at nearly outer cylinder body top, described draining section includes grade water annulus and a water leg,
The inner end of described shelves water annulus is coaxially disposed in outer cylinder body inwall, the inner of the shelves water annulus that this is located in outer cylinder body inwall
The transverse section in portion is inversed l-shaped, and the outer end of this grade of water annulus is outside inner end is inclined upwardly extends to through outer cylinder body inwall
Outside cylinder, forming the bent angle of arc transition and bend towards vertically downward direction outside outer cylinder body, the side of shelves water annulus is with outer
Cylinder is connected setting, the opposite side of the shelves water annulus arranged that should be connected with outer cylinder body and the setting of outer cylinder body interval, is arranged at
Being coaxially provided with water leg with outer cylinder body below shelves water annulus outside outer cylinder body, the diameter of this water leg is more than the shelves water outside outer cylinder body
The maximum gauge of annulus, this water leg, for collecting the drop flow down on the shelves water annulus outside outer cylinder body, this water leg sets
There is drainage arrangement, discharge for the liquid will collected in water leg.
Bilobate air swirl parallel combination demister the most according to claim 1, it is characterised in that: described outer cylinder body or
Inner barrel is straight bucket circular tube structure, a length of 500mm to 3000mm of outer cylinder body, and internal diameter is 100mm to 1000mm；Or, inner core
Body length is 200mm to 500mm, and internal diameter is 50mm to 500mm；Or, described outer cylinder body and/or inner barrel use coefficient of friction
Low material.
Bilobate air swirl parallel combination demister the most according to claim 2, it is characterised in that: described coefficient of friction
Low material is plastic.
Bilobate air swirl parallel combination demister the most according to claim 1, it is characterised in that: on described water leg
It is provided with drainage arrangement for arrange osculum or drain pipe on water leg.
5. according to the bilobate air swirl parallel combination demister described in any one of Claims 1-4, it is characterised in that: institute
State bilobate air swirl parallel combination demister to be arranged in the equipment of wet process of FGD.
Bilobate air swirl parallel combination demister the most according to claim 5, it is characterised in that: described bilobate is pneumatic
Eddy flow parallel combination demister is arranged in flue gas desulfurization device absorptive tower or is arranged on behind absorption tower individually in device.
7. the bilobate air swirl parallel combination demister as described in any one of claim 1 to 6 takes off at removing wet flue gas
Application in the aspect of free state drop contained in the flue gas after sulfur.
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| CN105169818A (en) | 2015-12-23 |
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