CN108159829A - The agglomeration device and its application that steam phase transforming is coupled with turbulent flow reunion - Google Patents
The agglomeration device and its application that steam phase transforming is coupled with turbulent flow reunion Download PDFInfo
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- CN108159829A CN108159829A CN201810212788.0A CN201810212788A CN108159829A CN 108159829 A CN108159829 A CN 108159829A CN 201810212788 A CN201810212788 A CN 201810212788A CN 108159829 A CN108159829 A CN 108159829A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D51/00—Auxiliary pretreatment of gases or vapours to be cleaned
- B01D51/02—Amassing the particles, e.g. by flocculation
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C3/00—Separating dispersed particles from gases or vapour, e.g. air, by electrostatic effect
- B03C3/01—Pretreatment of the gases prior to electrostatic precipitation
Abstract
The agglomeration device coupled the present invention relates to steam phase transforming with turbulent flow reunion and its application, the agglomeration device is in totally cuboid, the whole direction about incoming flue gas is in axially symmetric structure, agglomeration device left end is smoke inlet, it is connected with desulphurization plant, right end is exhanst gas outlet, is connected with wet electrical dust precipitator；The top and bottom sidewall upper edge device central axis of cuboid is arranged with multiple semiellipse column-shaped projections, and two semiellipse column-shaped projections opposing upper and lower are one group, share n groups, n >=2；The minimum point of each semiellipse column-shaped projection is towards inside device；Cuboid turbulence columns are equipped between first group of semiellipse column-shaped projection and smoke inlet, the center line of the cuboid turbulence columns is overlapped with the central axis of device, and cuboid turbulence columns are hollow cavity structure, and the upper and lower surface of cuboid turbulence columns is equipped with steam nozzle.The device increases the grain size of superfine particulate matter in a manner that steam phase transforming is coupled with turbulent flow reunion, simple in structure.
Description
Technical field
The present invention relates to the processing technology fields of superfine particulate matter in coal-fired flue-gas, particularly belong to a kind of steam phase transforming and rapids
The agglomeration device of stream reunion coupling and its application.
Background technology
PM2.5 is also referred to as lung particulate matter, refers to that equivalent aerodynamic diameter is less than or equal to 2.5 μm of fine grained
Object.PM2.5 does not only result in haze weather, influences people's daily routines, while breathing, cardiovascular system to human body etc. has sternly
It endangers again.Coal-burning boiler is the important component in modern production, while is the main emission sources of PM2.5 again.It is main at present
Particulate matter in flue gas is removed using electrostatic precipitator and bag filter etc., electrostatic precipitator and bag filter are to cigarette
The larger particulate matter removing effect of grain size in gas is preferable, but for superfine particulate matter since its specific resistance is high, charge capacity is poor
Cause removal efficiency relatively low.It is difficult removing superfine particulate matter using traditional dedusting method, therefore a kind of pretreatment dress need to be studied
The particle that superfine particulate matter is made to be agglomerated into greater particle size is put, and then improves the removal efficiency of superfine particulate matter.There are many roll into a ball at present
Poly- mode, reunite including acoustic agglomeration, magnetic coagulation, electric reunion, chemical agglomeration, heat reunion, turbulent flow reunion and steam phase transforming etc..It adopts
Reunited with turbulent flow and be not only simple in structure with the mode that steam phase transforming reunion is combined, it is easy to operate, and can be effectively promoted
Fine particle is grown up.After ultra-fine object of this pretreatment mode is reunited, it is removed into traditional deduster, so as to carry
High efficiency of dust collection.
Utility model patent application No. is 201621297870.0 proposes a kind of sintering flue gas fine particle and turns back
Capture unit and reunion capturing device, the utility model are grouped as by particle agglomeration part and bend pipe trap portion, reunion part
The main method reunited using chemical agglomeration and turbulent flow.Bend pipe trapping part mainly includes reservoir block, intake elbow and goes out
Gas bend pipe.The particle grown up by reunion can be settled in pipe bent position and be stored in reservoir part.The utility model utilizes reunion
Agent nozzle sprays into agglomerator to agglomeration device, and agglomerator is affected by many factors, such as reunion agent dose, reunion agent concentration, temperature
Degree and surface-active influence, so practical operation get up it is relatively difficult, meanwhile, chemical agglomeration can generate other pollutants,
Also it is post-processed, therefore chemical agglomeration is unfavorable for practical operation with the reunion mode that turbulent flow reunion couples.
Liu Hanxiao (Liu Hanxiao coal-fired superfine particulate matters whirlpool coalescence numerical simulation [D] North China Electric Power University, 2012.) is designed
Go out a kind of agglomeration device, shunt arranging four triangular prisms close to inlet inside agglomeration device, then arranged at rear
The Z-shaped votex sheets of three rows, every six votex sheets of row, the angle of Z-shaped votex sheet is vertical with incoming flue gas direction, shortcoming：Between votex sheet
It is closer to the distance, votex sheet below can be made to influence the development in front whirlpool, destroy established vortex, and then influence agglomerating effect；Separately
Outside, since votex sheet number can excessively cause resistance to increase, pressure drop increases, and is unfavorable for the normal operation of equipment.
Invention content
In view of the deficiencies of the prior art, the technical problem to be solved by the present invention is to provide a kind of steam phase transforming and turbulent flow group
The agglomeration device of poly- coupling and its application.The device increases ultra-fine grain in a manner that steam phase transforming is coupled with turbulent flow reunion
The grain size of object, simultaneously as turbulent element number is less, it is simple in structure, so pressure drop is smaller.By this pretreatment mode
Flue gas enters Wet type electric dust-removing device and particle is further removed, so as to improve the removal efficiency of superfine particulate matter.It should
It is easy to operate with device removing fine grained, it has both turbulent flow and reunites and steam phase transforming reunion.
The present invention solve the solution that uses of the technical problem for：A kind of steam phase transforming is provided to couple with turbulent flow reunion
Agglomeration device, the agglomeration device totally in cuboid, in axially symmetric structure reunite by the whole direction about incoming flue gas
Device left end is smoke inlet, is connected with desulphurization plant, right end is exhanst gas outlet, is connected with wet electrical dust precipitator；Its feature
It is, the top and bottom sidewall upper edge device central axis of cuboid is arranged with multiple semiellipse column-shaped projections, and opposing upper and lower two
A semiellipse column-shaped projection is one group, shares n groups, n >=2；The minimum point of each semiellipse column-shaped projection is towards inside device；
Between first group of semiellipse column-shaped projection and smoke inlet be equipped with cuboid turbulence columns, the center line of the cuboid turbulence columns with
The central axis of device overlaps, and cuboid turbulence columns are hollow cavity structure, and the upper and lower surface of cuboid turbulence columns is equipped with steaming
Vapour spout, the front and back sides of cuboid turbulence columns are equipped with the interface of connection high pressure vapor line, the interface of high pressure vapor line
It is connected with steam spray device；One C-shaped flow-disturbing whirlpool is set in the device between first group and second group of semiellipse column-shaped projection
Piece, the C-shaped flow-disturbing votex sheet are located on the central axis of device, after second group of semiellipse column-shaped projection using device central axis as
Axis is symmetrical above and below to set two C-shaped flow-disturbing votex sheets, and one is arranged on the device central axis after third group semiellipse column-shaped projection
A C-shaped flow-disturbing votex sheet, multiple C-shaped flow-disturbing votex sheets are arranged in fork row's mode；The opening direction of each C-shaped flow-disturbing votex sheet is towards cigarette
Gas exports.
The application of agglomeration device that a kind of above-mentioned steam phase transforming is coupled with turbulent flow reunion, the device are used to remove ultra-fine
Grain object, specific subtractive process are：
(1) flue gas after desulphurization denitration enters agglomeration device with the speed of 5m/s, into the dust constaining of agglomeration device
Gas can be spread, and collision effect can be wherein generated between particle and particle；
(2) flue gas flows through the cuboid turbulence columns with injection steam function after diffusion, and cuboid turbulence columns both may be used
To generate shunting function to flue gas, while steam is sprayed into agglomeration device, increase jet velocity when granule content is more, by
Velocity of flue gas can be made to change in both effects, generate velocity gradient, two sides are formed at the rear of cuboid turbulence columns
To opposite vortex, the smaller particle of diameter follows whirlpool rotary collision on the inside of whirlpool, and then grows into larger particle；
(3) and then pass through semiellipse column-shaped projection flow-disturbing, a vortex is formd at the rear of semiellipse column-shaped projection, half
Elliptical cylinder-shape protrusion and the distance of cuboid flow-disturbing intercolumniation make steam fully develop, and semiellipse column-shaped projection and C-shaped flow-disturbing whirlpool
The vortex that distance between piece is formed protrusion is not influenced by below with C-shaped flow-disturbing votex sheet, and the smaller particle of diameter is in whirlpool
Side follows whirlpool rotary collision, and then grows into larger particle；
(4) velocity of flue gas after the C-shaped flow-disturbing votex sheet that fork arrangement is put changes, and forms larger velocity gradient,
The opposite vortex of both direction is formed at the rear of C-shaped flow-disturbing votex sheet；The smaller particle of diameter follows vortex to turn to touch on the inside of whirlpool
It hits, and then grows into larger particle；
(5) flue gas after the shunting of cuboid turbulence columns and multiple C-shaped flow-disturbing votex sheet flow-disturbings is flowed out from exhanst gas outlet,
Wet electrical dust precipitator is entered, further removing processing is carried out to particle by wet electrical dust precipitator.
Compared with existing technology, the beneficial effects of the invention are as follows：
(1) it is (interior to be equipped with the cuboid turbulent element with injection steam function at smoke inlet for agglomeration device of the present invention
Portion's injection can make cuboid also have the function of flow-disturbing, and two kinds of effects are attached to above a device by such method.), it is long
Cube turbulent element makes concurrent flow flue gas generate distributary phenomenon, while the rapid steam phase transforming that occurs acts on, and causes turbulent element all
It encloses with larger velocity gradient, two vortexs with opposite direction of face formation, little particle follow on the inside of whirlpool behind
It is vortexed and turns, so as to occur mutually to collide, ultimately form the larger particle of grain size.
(2) method and agglomeration device that a kind of steam phase transforming of the invention is coupled with turbulent flow reunion, have injection steam work(
The cuboid and turbulent element of energy are placed in the inside of particle agglomeration device, and steam injection direction is vertical with incoming flue gas direction, this
Sample is both appropriate to increase the touch opportunity of steam and superfine particulate matter, while avoid rearward to spray and be broken to having formed whirlpool
It is bad, promote the quick reunion of particulate matter.
(3) agglomeration device inner wall of the present invention be equipped with semiellipse column-shaped projection (the raised boundary line of half elliptic is more smooth,
It is less prone to flow dead zone).When incoming flue gas passes through semiellipse protrusion, larger velocity gradient can be generated, at raised rear
It is formed and is vortexed.Such structure can increase the flow disturbance of boundary, and little particle is made vortex to be followed to rotate when flowing through boundary,
The particle of greater particle size is grown into, enhances agglomerating effect.
(4) apparatus of the present invention are simple, popularization easy to process.Turbulent element has the cuboid flow-disturbing with injection steam function
Column and C-shaped) flow-disturbing votex sheet, symmetrical elliptical shaped lobes are equipped on agglomeration device inner wall, flue gas is by cuboid flow-disturbing member
The agglomeration device channel with novel turbulent element is entered after part shunting, the combined arranging mode of this votex sheet has smaller pressure
Power drops, meanwhile, gradient of pushing the speed promotes particle to become the particle of greater particle size.
(5) water vapour phase transformation mainly works to little particle, therefore agglomeration device first half mainly passes through steam phase transforming
Make particle agglomeration, since steam phase transforming occurs quickly, after the particle growth in later half region, steam phase transforming effect is unknown
It is aobvious, and turbulent flow reunion is directed to the slightly larger particle of grain size, therefore mainly reunited in the later half region of agglomeration device using turbulent flow.It is this
The mode that the reunion of steam phase transforming and turbulent flow couples avoids inconvenience and pollution that chemical agglomeration is brought.Ash-laden gas is through excessive
Stream, perturbation action increase the collision probability of particle and particle, enhance agglomerating effect, can be connected with wet electrical dust precipitator and tap into
Row dedusting has long-range development prospect.
Description of the drawings
Fig. 1 is that steam phase transforming of the present invention is illustrated with the stereochemical structure of a kind of embodiment of agglomeration device that turbulent flow reunion couples
Figure；
Fig. 2 is the speed vector figure in the agglomeration device of fine grained in embodiment 1；
Particle size distribution figure in flue gas before and after Fig. 3 reunites for agglomeration device in embodiment 1；
Fig. 4 is the structure diagram of cuboid turbulent element；
In Fig. 1：1- smoke inlets；2- semiellipse column-shaped projections；3- exhanst gas outlets；4- cuboid turbulence columns；5-C shape flow-disturbings
Votex sheet；41 with the interfaces of 42- high pressure vapor lines, 43 with 44- steam nozzles.
Specific embodiment
Hereafter the embodiment of the present invention is described in more detail, only for being illustrated, is not intended as to the present invention
The restriction of claimed range.
The agglomeration device that steam phase transforming of the present invention is coupled with turbulent flow reunion, the agglomeration device (referring to Fig. 1) is totally in rectangular
The bodily form, the whole direction about incoming flue gas is in axially symmetric structure, and agglomeration device left end is smoke inlet 1, with desulphurization plant
It is connected, right end is exhanst gas outlet 3, is connected with wet electrical dust precipitator；The top and bottom sidewall upper edge device central axis pair of cuboid
Claim to be equipped with multiple semiellipse column-shaped projections 2, two semiellipse column-shaped projections opposing upper and lower are one group, share n groups, n >=2；Often
The minimum point of a semiellipse column-shaped projection is towards inside device；Between first group of semiellipse column-shaped projection and smoke inlet 1
Equipped with cuboid turbulence columns 4, the center line of the cuboid turbulence columns 4 is overlapped with the central axis of device, and cuboid turbulence columns are
Hollow cavity structure, the upper and lower surfaces of cuboid turbulence columns are equipped with steam nozzle, and 43 and 44 in as Fig. 4, cuboid is disturbed
The front and back sides of fluidization tower are equipped with the interface of connection high pressure vapor line, and 41 and 42 in as Fig. 4, high pressure vapor line connects
Mouth is connected with steam spray device；One C-shaped flow-disturbing is set in the device between first group and second group of semiellipse column-shaped projection
Votex sheet 5, which is located on the central axis of device, with device central shaft after second group of semiellipse column-shaped projection
Line is axis two C-shaped flow-disturbing votex sheet of setting symmetrical above and below, cloth on the device central axis after third group semiellipse column-shaped projection
A C-shaped flow-disturbing votex sheet 5 is put, multiple C-shaped flow-disturbing votex sheets 5 are arranged in fork row's mode, are arranged arrangement using fork, are both increased sky
Between utilization rate, while reduce below votex sheet to front votex sheet into the influence in whirlpool, enhance the disturbance to fluid；Each C-shaped flow-disturbing
The opening direction of votex sheet is towards exhanst gas outlet.
Apparatus of the present invention are further characterized by cuboid turbulence columns and are disturbed with distance, first C-shaped at smoke inlet
Stream votex sheet is disturbed with the distance at smoke inlet, the C-shaped flow-disturbing votex sheet on device central axis to two symmetrically arranged C-shapeds
It is 3 to flow the distance between distance, two adjacent groups protrusion of votex sheet the ratio between four：4：6：6；The semi-major axis of semiellipse column-shaped projection is
The 1/5 of agglomeration device width.Due to the flow feature in flow field in the application, between cuboid turbulence columns, novel votex sheet and protrusion
Distance should rationally set, space should be fully utilized, while to ensure not influence mutually between whirlpool and whirlpool.This Shen
Please in the short axle of semiellipse column-shaped projection overlapped with wall surface, connect by the way of welding with wall surface.
Apparatus of the present invention are further characterized by n=2, first group of semiellipse column-shaped projection and second group of semiellipse cylindricality
Protrusion is respectively at the 1/4 and 11/20 of entire agglomeration device length.
Convex sets number n=2 in the present invention, in practical production, flue gas flow rate and load difference lead to fine grained
Content it is different, when fine particle content increase in flue gas, can suitably increase quantity of steam and convex sets number, it is thin so as to make
Particulate matter mixes more abundant in whirlpool.
It is long to refer to elliptical major semiaxis for the height of semiellipse column-shaped projection in the present invention.
The present invention also protects the application of agglomeration device that a kind of above-mentioned steam phase transforming is coupled with turbulent flow reunion, which is used for
Superfine particulate matter is removed, specific subtractive process is：
(1) flue gas after desulphurization denitration enters agglomeration device with the speed of 5m/s, into the dust constaining of agglomeration device
Gas can be spread, and collision effect can be wherein generated between particle and particle；
(2) flue gas flows through the cuboid turbulence columns with injection steam function after diffusion, and cuboid turbulence columns both may be used
To generate shunting function to flue gas, while steam is sprayed into agglomeration device, steam jet velocity can be according to flue gas content not
With being adjusted correspondingly, it can suitably increase jet velocity when granule content is more, since both effects can make flue gas
Speed changes, and generates velocity gradient, and the opposite vortex of both direction is formed at the rear of cuboid turbulence columns, and diameter is smaller
Particle follows whirlpool rotary collision on the inside of whirlpool, and then grows into larger particle；
(3) and then pass through semiellipse column-shaped projection flow-disturbing, a vortex is formd at the rear of semiellipse column-shaped projection, half
Elliptical cylinder-shape protrusion and the distance of cuboid flow-disturbing intercolumniation make steam fully develop, and semiellipse column-shaped projection and C-shaped flow-disturbing whirlpool
The vortex that distance between piece is formed protrusion is not influenced by below with C-shaped flow-disturbing votex sheet, and the smaller particle of diameter is in whirlpool
Side follows whirlpool rotary collision, and then grows into larger particle；
(4) velocity of flue gas after the C-shaped flow-disturbing votex sheet that fork arrangement is put changes, and forms larger velocity gradient,
Form the opposite vortex of both direction at the rear of C-shaped flow-disturbing votex sheet, C-shaped flow-disturbing votex sheet along device length direction distance for
Particle agglomeration is affected, and too small spacing can make the development in the front whirlpool of votex sheet influence below；The smaller particle of diameter is in whirlpool
Side follows whirlpool rotary collision, and then grows into larger particle；
(5) flue gas after the shunting of cuboid turbulence columns and multiple C-shaped flow-disturbing votex sheet flow-disturbings is flowed out from exhanst gas outlet,
Wet electrical dust precipitator is entered, further removing processing is carried out to particle by wet electrical dust precipitator.
Apparatus of the present invention are uniform for particle diameter distribution in superfine particulate matter, and grain diameter is in the particle of below PM2.5
Removal effect is more notable, and flue gas is after agglomeration device reunion, long greatly 1.5 μ of particle of the grain size below 0.3 μm
The particle of m-2.5 μm of greater particle size.The application is primarily directed to the de- of small particle of the entrance grain diameter below 0.3 μm
Removing, the application has after-treatment device --- wet cottrell is higher for the removal efficiency of 2 μm or so of particle, by group
Flue gas after poly- enters wet electrical dust precipitator, carries out further effective removing to particle again.
The present invention by steam promote fine particle grow up with turbulent flow reunion be attached on a device, homonymy it is two neighboring
The distance of semiellipse column-shaped projection accounts for the 3/10 of agglomeration device total length, can both be formed than more complete whirlpool, and increased simultaneously
Space availability ratio by simulating discovery repeatedly, when the height of semiellipse column-shaped projection is the 1/5 of agglomeration device width, can make
First group of semiellipse column-shaped projection and cuboid flow-disturbing column combination and second group of semiellipse column-shaped projection and C-shaped flow-disturbing votex sheet group
It closes most advantageous to agglomerating effect；Using C-shaped flow-disturbing votex sheet, and arranged in a manner of a kind of fork row, the first row votex sheet and the
The spacing of two rows is agglomeration device length 3/10, increases space availability ratio, reduces following device and front vortex structure is broken
Bad effect；Water vapour phase transformation mainly works to little particle, therefore agglomeration device first half is mainly made by steam phase transforming
Particle agglomeration, since steam phase transforming occurs quickly, after the particle growth in later half region, steam phase transforming effect unobvious, therefore
Mainly reunited in the later half region of agglomeration device using turbulent flow, turbulent flow reunion is directed to the slightly larger particle of grain size.
Embodiment 1
The present embodiment agglomeration device is whole to close on the whole in cuboid, but its boundary is equipped with semiellipse column-shaped projection
In the direction of incoming flue gas into axially symmetric structure.Agglomeration device left end is smoke inlet 1, is connected with desulphurization plant, right end
For exhanst gas outlet 3, it is connected with wet electrical dust precipitator.Include the cuboid turbulence columns with injection steam function inside agglomeration device
4 and C-shaped flow-disturbing votex sheet 5,4 center line of cuboid turbulence columns with injection steam function is located at the center line of agglomeration device
On, cuboid turbulence columns are close to smoke inlet position, and vertical view is a rectangle, and long side is vertical with flue gas direction of flow,
The first row C-shaped flow-disturbing votex sheet 5 is located at the 2/5 of entire agglomeration device, total of three C-shaped flow-disturbing votex sheet, in a manner that fork is arranged
Arrangement.
A length of 1000mm of the agglomeration device, width 400mm, a height of 200mm.
Distance of the rectangular center at smoke inlet is 150mm, rectangular a length of 80mm, width 30mm.
The vertical view of the agglomeration device side upside of ellipse column-shaped projection is half elliptic, the short axle of half elliptic and reunion
Device overlapping margins, long axis is vertical with agglomeration device boundary, and semi-minor axis be 20mm, semi-major axis 80mm, first group of semiellipse
The distance of column-shaped projection to smoke inlet is 250mm, altogether two groups of protrusions, and the distance of two groups of protrusions is 300mm.
Fig. 2 is speed vector figure of the fine grained in the present embodiment agglomeration device, is shown in figure：After desulphurization denitration
Flue gas enters agglomeration device with the speed of 5m/s, carries out adequately mixing and diffusion, first flows through the length with injection steam function
Cube turbulence columns, cuboid turbulence columns can generate shunting function, while steam is sprayed into agglomeration device to flue gas, rapid to send out
Raw steam phase transforming effect, since both effects can make velocity of flue gas change, generates velocity gradient, in cuboid turbulence columns
Rear form the opposite vortex of both direction, the smaller particle of diameter follows whirlpool rotary collision on the inside of whirlpool, so grow into compared with
Big particle.Then the C-shaped flow-disturbing votex sheet put by semiellipse column-shaped projection and fork arrangement, the velocity of flue gas after flow-disturbing
It changes, forms larger velocity gradient, the opposite vortex of both direction is formed at the rear of C-shaped flow-disturbing votex sheet, and half is ellipse
Cylindrical protrusions rear is formed than more complete vortex.Water vapour phase transformation mainly works to little particle, therefore agglomeration device first half
Part mainly makes particle agglomeration by steam phase transforming, and since steam phase transforming occurs quickly, the particle in later half region is long
After big, steam phase transforming effect unobvious, and turbulent flow reunion is directed to the slightly larger particle of grain size, therefore in the later half region of agglomeration device
Mainly reunited using turbulent flow.Flue gas after the shunting of cuboid turbulence columns and C-shaped flow-disturbing votex sheet flow-disturbing goes out from agglomeration device
Mouth outflow, enters wet electrical dust precipitator, and further removing processing is carried out to particle by wet electrical dust precipitator.
Particle size distribution figure in flue gas before and after Fig. 3 reunites for agglomeration device, abscissa, ordinate represent respectively in figure
Grain grain size and particle random trajectory model percentage.Inlet grain diameter is largely below 0.3 μm, and the maximum value of particle diameter distribution exists
Between 0.2-0.3 μm, after reuniting by the agglomeration device, the peak value of particle size distribution figure is significantly as grain diameter is increased
Direction is moved, and can be obtained by analyzing grain diameter component, and flue gas passes through the agglomeration device, and superfine particulate matter has apparent length
Big effect.
In invention, it is opposite concept to wait terms up and down.The direction of smoke inlet 1 is left, the side of exhanst gas outlet 3
To for the right side, the outer wall of the agglomeration device with protrusion is upper and lower directions.
The present invention does not address part and is suitable for the prior art.
Claims (4)
1. the agglomeration device that the reunion of a kind of steam phase transforming and turbulent flow couple, the agglomeration device totally in cuboid, integrally about
The direction of incoming flue gas is in axially symmetric structure, and agglomeration device left end is smoke inlet, is connected with desulphurization plant, right end is cigarette
Gas exports, and is connected with wet electrical dust precipitator；It is characterized in that, the top and bottom sidewall upper edge device central axis of cuboid is arranged with
Multiple semiellipse column-shaped projections, two semiellipse column-shaped projections opposing upper and lower are one group, share n groups, n >=2；Each semiellipse
The minimum point of column-shaped projection is towards inside device；Cuboid is equipped between first group of semiellipse column-shaped projection and smoke inlet
Turbulence columns, the center line of the cuboid turbulence columns are overlapped with the central axis of device, and cuboid turbulence columns are hollow cavity structure,
The upper and lower surface of cuboid turbulence columns is equipped with steam nozzle, and the front and back sides of cuboid turbulence columns are equipped with connection high steam
The interface of pipeline, the interface of high pressure vapor line are connected with steam spray device；In first group and second group of semiellipse column-shaped projection
Between device in setting one C-shaped flow-disturbing votex sheet, which is located on the central axis of device, in second group Ban
Using device central axis as axis two C-shaped flow-disturbing votex sheets of setting symmetrical above and below after elliptical cylinder-shape protrusion, in third group semiellipse column
A C-shaped flow-disturbing votex sheet is arranged on device central axis after shape protrusion, multiple C-shaped flow-disturbing votex sheets are arranged in fork row's mode；Often
The opening direction of a C-shaped flow-disturbing votex sheet is towards exhanst gas outlet.
2. the agglomeration device that steam phase transforming according to claim 1 is coupled with turbulent flow reunion, which is characterized in that cuboid is disturbed
Distance, first C-shaped flow-disturbing votex sheet at fluidization tower and smoke inlet at smoke inlet distance, on device central axis
C-shaped flow-disturbing votex sheet to the distance between the distances of two symmetrically arranged C-shaped flow-disturbing votex sheets, two adjacent groups protrusion the ratio between four
It is 3：4：6：6；The semi-major axis of semiellipse column-shaped projection is the 1/5 of agglomeration device width.
3. the agglomeration device that steam phase transforming according to claim 1 is coupled with turbulent flow reunion, which is characterized in that n=2, first
Group semiellipse column-shaped projection and second group of semiellipse column-shaped projection are located at the 1/4 and 11/20 of entire agglomeration device length respectively
Place.
4. the application of agglomeration device that a kind of steam phase transforming described in claim 1 is coupled with turbulent flow reunion, which is used to take off
Except superfine particulate matter, specific subtractive process is：
（1）Flue gas after desulphurization denitration enters agglomeration device with the speed of 5m/s, into the ash-laden gas meeting of agglomeration device
It spreads, collision effect can be wherein generated between particle and particle；
（2）Flue gas flows through the cuboid turbulence columns with injection steam function, cuboid turbulence columns both can be right after diffusion
Flue gas generates shunting function, while steam is sprayed into agglomeration device, increases jet velocity when granule content is more, due to this
Two kinds of effects can make velocity of flue gas change, and generate velocity gradient, and both direction phase is formed at the rear of cuboid turbulence columns
Derotation whirlpool, the smaller particle of diameter follows whirlpool rotary collision on the inside of whirlpool, and then grows into larger particle；
（3）Then by semiellipse column-shaped projection flow-disturbing, a vortex, semiellipse are formd at the rear of semiellipse column-shaped projection
The distance of column-shaped projection and cuboid flow-disturbing intercolumniation makes steam fully develop, and between semiellipse column-shaped projection and C-shaped flow-disturbing votex sheet
Distance the vortex that is formed of protrusion is made not influenced by below with C-shaped flow-disturbing votex sheet, the smaller particle of diameter on the inside of whirlpool with
With whirlpool rotary collision, and then grow into larger particle；
（4）Velocity of flue gas after the C-shaped flow-disturbing votex sheet that fork arrangement is put changes, and larger velocity gradient is formed, in C-shaped
The rear of flow-disturbing votex sheet forms the opposite vortex of both direction；The smaller particle of diameter follows whirlpool rotary collision on the inside of whirlpool, into
And grow into larger particle；
（5）Flue gas after the shunting of cuboid turbulence columns and multiple C-shaped flow-disturbing votex sheet flow-disturbings is flowed out from exhanst gas outlet, is entered
To wet electrical dust precipitator, further removing processing is carried out to particle by wet electrical dust precipitator.
Priority Applications (1)
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| CN111773865A (en) * | 2020-07-09 | 2020-10-16 | 中国石油大学(华东) | Experimental device and method for efficiently removing PM2.5 fine particles in industrial boiler tail gas |
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