CN108159787A - Strengthen the device that fine particle collision coalescence is grown up in flue gas - Google Patents
Strengthen the device that fine particle collision coalescence is grown up in flue gas Download PDFInfo
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- CN108159787A CN108159787A CN201810239936.8A CN201810239936A CN108159787A CN 108159787 A CN108159787 A CN 108159787A CN 201810239936 A CN201810239936 A CN 201810239936A CN 108159787 A CN108159787 A CN 108159787A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D45/00—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces
- B01D45/12—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces by centrifugal forces
- B01D45/16—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces by centrifugal forces generated by the winding course of the gas stream, the centrifugal forces being generated solely or partly by mechanical means, e.g. fixed swirl vanes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D45/00—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces
- B01D45/04—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces by utilising inertia
- B01D45/08—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces by utilising inertia by impingement against baffle separators
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Abstract
The present invention relates to strengthen the device that fine particle collision coalescence is grown up in flue gas, the device is injected into device by the inclination of both sides flue gas, during in both sides, flue gas contacts with each other, fine particle realizes the collision frequency improved while premixing between them in flue gas, enhancing interaction, be conducive to fine grain tentatively grow up, the whirlpool of different scale formed successively by the turbulent element of reasonable Arrangement in a device and production whirlpool votex sheet again, further hit against the particle of different scale, coalescence is grown up, particle after growing up is exported because effect of inertia is detached from whirlpool with flue gas flow direction, and then it is removed by cleaner supplementary set.The apparatus structure is simple, and energy consumption is relatively low, manufactures at low cost, fine particle coalescence significant effect.
Description
Technical field
The invention belongs to remove superfine particulate matter technical field in coal-burning boiler flue, and in particular to a kind of to promote ultra-fine
Interaction between grain object is allowed to the device that fine particle collision coalescence is grown up in the long greatly reinforcing flue gas of larger particles.
Background technology
Globally, China is coal-fired big country, and the burning of wherein coal-burning boiler fossil fuel is ultra-fine grain in air
One of main source of object.Superfine particulate matter is typically located at sub-micrometer scale hereinafter, causing its specific surface since its grain size is minimum
Product is very big, and harmful substance is easily adsorbed on its surface, is influenced the outdoor sports of the mankind, is endangered the health of the mankind.Now
As much-talked-about topic haze precisely due in air ultra-fine fine particle containing high concentration by caused by complicated process,
This atmosphere pollution is very severe, constantly corrodes home for the survival of mankind.
Although the relative maturity of the removing equipment development of fine particle, traditional cleaner in coal-burning boiler flue
Such as electric precipitator and bag filter quality removal efficiency may be up to 99% in addition more than, if but with the number of superfine particulate matter
Gauge, since they are ineffective to the supplementary set of superfine particulate matter, removal efficiency is but very low, still has a large amount of superfine particulate matters to enter
Into atmospheric environment.For the above situation, it is contemplated that particle coalescence technology is only needed before existing cleaner to ultra-fine grain
Object carries out physics and the preprocessing process of chemical action, is allowed to grow into bulky grain and then reaches the supplementary set range of cleaner,
With strong applicability, fine particle removal efficiency is high, easily the advantages such as popularization, becomes the hot issue of numerous scholars' researchs.Wherein
Turbulent flow coalescence be using different reunion cell structures, different shape, different arrangement modes votex sheet caused by fluid whirl with
Interaction occurs between particle and reaches preferable coalescence effect, without the input of additional-energy, investment and operating cost are low, behaviour
Make simplicity, there is preferable development prospect.
The patent of invention of Patent No. ZL201610068682.9 proposes a kind of the de- of fire coal boiler fume fine particle
Except device and technique.What the mixture of ash-laden gas and steam was arranged symmetrically through 2n along the center of percussion flow phase change chamber main body
Flue gas vapors injector enters at a high speed percussion flow phase change chamber in opposite directions, and with vapour mixture mutually head-on collision, stroke speed occur for flue gas
For 18m/s, promote the collision of fine particle；The circle that flue gas after shock is arranged with vapour mixture using phase change chamber center line
Column carries out streaming eddying motion, and fine particle is made constantly to grow up.It is disadvantageous in that flue gas vapors injector runner is relatively narrow and leads
Manage more, complex process, increase flow resistance, consume a large amount of vapor, although and the high velocity vertical of flue gas be injected with being conducive to
Increase the collision frequency between particle, but flow direction changes difficult, is unfavorable for ash-laden gas along horizontal axis to exporter
To flowing, flow resistance is increased.
Patent of invention application No. is 201610339365.6 proposes a kind of regulatable turbulent flow production whirlpool superfine particulate matter
Coalescence device.It is symmetrical in each partition board both sides using in flue of multiple baffle arrangements parallel with incoming before electric precipitator
The large and small flow-disturbing rack of arrangement interval arrangement, wherein large and small flow-disturbing rack size is smaller, quantity is more, is made as production whirlpool element
It is weaker into each flow-disturbing rack production vortices breakdown, it is unfavorable for the further reunion of bulky grain object, particulate matter agglomerating effect is caused to take
Certainly in the quantity of flow-disturbing rack, increase manufacture cost, while this rack machining accuracy with semicircular notch is higher, structure
It is complicated.
Invention content
In view of the deficiencies of the prior art, the technical issues of present invention intends to solve is to propose fine grained in a kind of reinforcing flue gas
The device that object collision coalescence is grown up.The device is injected into device by the inclination of both sides flue gas, and in both sides, flue gas contacts with each other
In the process, fine particle realizes the collision frequency improved while premixing between them in flue gas, and enhancing interaction has
It tentatively grows up conducive to fine grain, then is formed not by the turbulent element of reasonable Arrangement in a device and production whirlpool votex sheet successively
With the whirlpool of scale, make that the particle of different scale is further hit against, coalescence is grown up, the particle after growing up is detached from whirlpool because of effect of inertia
Whirlpool is exported with flue gas flow direction, and then is removed by cleaner supplementary set.The apparatus structure is simple, and energy consumption is relatively low, and manufacture is at low cost, carefully
Particulate matter coalescence significant effect.
The present invention solve described device technical problem the technical solution adopted is that：Fine particle in a kind of reinforcing flue gas is provided
The device that collision coalescence is grown up, the device is by gas inlet section, flue gas mixing collision section, turbulent flow coalescence section, exhanst gas outlet Duan Si
Part forms；There are two gas inlets in the gas inlet section, it is characterised in that：Described two gas inlets are symmetrical to tilt
Arrangement, the flow of flue gas direction of each gas inlet and horizontal direction are in 20 °~35 ° of angle, the tail portion of two gas inlets
It is connected；
The flue gas mixing collision section includes changeover portion and horizontal segment, changeover portion connection horizontal segment front end, changeover portion two
Flue gas starts contact-impact to the region of horizontal segment front end in a gas inlet, and changeover portion is in tapered configuration, two gas inlets
Collision section is mixed with flue gas and is together to form " Y " character form structure, and the width of horizontal segment is less than the sum of two gas inlet width；Institute
State the regular triangular prism turbulent element for being disposed with that cross sectional shape is equilateral triangle in the horizontal center line axis of horizontal segment, regular triangular prism
One vertex of turbulent element is located in horizontal center line axis and towards gas inlet direction；
The whole multistage stepped flaring shape substantially symmetrical about its central axis along the presentation of flow of flue gas direction of the turbulent flow coalescence section, every grade
Flaring angle is 45~60 °, including flaring part and horizontal extensions；It is angular that multiple right angles are provided in turbulent flow coalescence section
Produce whirlpool votex sheet and inclined plate type production whirlpool votex sheet, the angular production whirlpool votex sheets in multiple right angles interlock cloth using horizontal center line axis as axial symmetry
It puts；At last row right angle, the rear arrangement inclined plate type production whirlpool votex sheet of angular production whirlpool votex sheet, two inclined plate types produce whirlpool votex sheet
It is one group, the both sides of horizontal center line axis is symmetrically distributed in splayed, splay osculum direction is tilted towards exhanst gas outlet
Board-like production whirlpool votex sheet does not block staggeredly spatially with the angular production whirlpool votex sheet in right angle；
The exhanst gas outlet section is in gradually-reducing shape, and is tightly coupled after turbulent flow coalescence section, exhanst gas outlet connection cleaner,
And the angle between the wall surface and horizontal direction of exhanst gas outlet section is 30~45 °, the width of exhanst gas outlet and the width of horizontal segment
Unanimously.
Compared with the prior device, the beneficial effects of the invention are as follows：
(1) there are two gas inlet, two gas inlets to be arranged symmetrically apparatus of the present invention to tilt, two gas inlets and
Flue gas mixing collision section is together to form " Y " character form structure, and compared with flue gas fully horizontally enters, which can make cigarette
Intense contact collides, generates larger particles enrichment region gas on a horizontal axis, in vertical direction the cigarette from horizontal axis farther out
Gas-bearing formation because interlayer collision occurs for change and the adjacent flue gas layer of flow direction, enhance between little particle, bulky grain and little particle it
Between collision frequency, be conducive to particulate matter in advance grow up；Compared with two strands of flue gases are completely vertical in opposite directions to spray, the structure
While increase flue gas mutually collides, also help flue gas and flowed along horizontal axis to export direction, flow resistance is smaller.
(2) in apparatus of the present invention flue gas mixing collision section, the width of horizontal segment is less than the sum of two gas inlet width, right
Flue gas generates the effect of decompressing speed-increasing, makes the continuous variation of flue gas direction and speed, can be further between reinforcing particle object
Collision effect.
(3) in apparatus of the present invention flue gas mixing collision section, being disposed with cross sectional shape in the horizontal center line axis of horizontal segment is
The regular triangular prism turbulent element of equilateral triangle, simple in structure, resistance is smaller, and shunting, flow-disturbing are with obvious effects.When flue gas flows through
During regular triangular prism turbulent element, the larger particles of near axis start to detach to both sides, make between little particle, bulky grain with it is small
Violent intersection-type collision occurs between particle again, strengthens collision effect again, the flue gas after shunting is because of the drastically increasing of speed
Add to form jet stream, be conducive to generate larger velocity gradient, the particulate matter for making grain size different first coalescence in whirlpool is grown up, should
Jet stream also provides advantageous velocity conditions for turbulent flow coalescence section.
(4) the whole multistage substantially symmetrical about its central axis along the presentation of flow of flue gas direction of apparatus of the present invention turbulent flow coalescence section is stepped gradually
Expand shape, on the one hand the design of the wall structure can suitably reduce flow of flue gas speed and resistance, and extend particulate matter in turbulent flow
The residence time of coalescence section enhances the turbulent flow coalescence effect of fine particle, avoids particulate matter and taken away in time by main flume, separately
On the one hand the combination of the angular production whirlpool votex sheet of the structure and neighbouring right angle is conducive to generate the whirlpool of different scale at tortuous wall surface
Whirlpool also improves the contact area of flue gas and wall surface, and the turbulent flow coalescence for being conducive to fine particle near wall flue gas is grown up, then
In addition the fork arrangement of production whirlpool votex sheet puts and (spatially interlocks and do not block), reach at each spatial position of turbulent flow coalescence section in flue gas
The purpose that fine particle is fully grown up, when flue gas flows through the angular production whirlpool votex sheet in right angle in horizontal extensions space,
Increased by the velocity of flue gas of near wall, that is, produce advantageous velocity gradient, and the issuable deposition to lower wall surface
Grain has purging effect.
(5) apparatus of the present invention exhanst gas outlet is tapered shape, and flow of flue gas speed is increased, under effect of inertia, had
Conducive to the collision between the further little particle strengthened bulky grain and partly do not grown up fully, make particle growth effect more aobvious
It writes.
The present invention strengthens the device that fine particle collision coalescence is grown up in flue gas, simple and compact for structure, each stage space cloth
Office rationally, is be combined with each other to reach fine particle and collide coalescence using turbulent element, production whirlpool votex sheet and apparatus structure and be grown up preferably
Effect, without the input of additional-energy, investment and operating cost are low, and need to only be mounted on before cleaner, thus with compared with
Good application prospect.
Description of the drawings
Fig. 1 is the stereochemical structure of a kind of embodiment of device that the present invention strengthens that fine particle collision coalescence is grown up in flue gas
Schematic diagram.
Fig. 2 is the front view structure of a kind of embodiment of device that the present invention strengthens that fine particle collision coalescence is grown up in flue gas
Schematic diagram.
Fig. 3 is the speed of a kind of embodiment particulate matter of device that the present invention strengthens that fine particle collision coalescence is grown up in flue gas
Spend polar plot.
Fig. 4 is the speed of a kind of embodiment particulate matter of device that the present invention strengthens that fine particle collision coalescence is grown up in flue gas
Spend vector partial enlarged view.
Fig. 5 be the present invention strengthen in flue gas a kind of fine particle embodiment flue gas of device for growing up of collision coalescence into and out of
The distribution map of mouth grain diameter and number density percentage.
In figure：1-gas inlet, 2-regular triangular prism turbulent element, the angular production whirlpool votex sheet in 3-right angle, 4-inclined plate type
Produce whirlpool votex sheet, 5-complications wall surface, 6-exhanst gas outlet, A-gas inlet section, B-flue gas mixing collision section, C-turbulent flow coalescence
Section, D-exhanst gas outlet section.
Specific embodiment
The present invention is described in detail, but is not protected in this, as to the application with reference to embodiment and attached drawing
The restriction of range.
The present invention strengthens the device (abbreviation device, referring to Fig. 1 and Fig. 2) that fine particle collision coalescence is grown up in flue gas, should
Device is made of gas inlet section A, flue gas mixing collision section B, turbulent flow coalescence section C, tetra- parts of exhanst gas outlet section D；The flue gas
There are two gas inlets 1, two gas inlets 1 in inducer A to be arranged symmetrically to tilt, the flow of flue gas of each gas inlet 1
Direction and the angle that horizontal direction is in 20 °~35 °, the tail portion of two gas inlets is connected；
The flue gas mixing collision section B includes changeover portion and horizontal segment, changeover portion connection horizontal segment front end, changeover portion two
Flue gas starts contact-impact to the region of horizontal segment front end in a gas inlet, and changeover portion is in tapered configuration, two gas inlets 1
Collision section B is mixed with flue gas and is together to form " Y " character form structure, and the width of horizontal segment is less than the sum of two 1 width of gas inlet；
Be disposed in the horizontal center line axis of the horizontal segment cross sectional shape be equilateral triangle regular triangular prism turbulent element 2, positive three
The bottom surface length of side of prism turbulent element is the 3/10 of horizontal segment width, and one vertex of regular triangular prism turbulent element is located at horizontal centre
On axis and towards gas inlet direction, the distance of vertex to changeover portion front end in horizontal center line axis is mixed for flue gas
Collide the 3/5 of section B (changeover portion and horizontal segment) length；
The turbulent flow coalescence section C is whole, and the stepped flaring shape of multistage substantially symmetrical about its central axis is presented along flow of flue gas direction, often
Grade flaring angle is 45~60 °, including flaring part and horizontal extensions；Multiple right angles are provided in turbulent flow coalescence section C
Angular production whirlpool votex sheet 3 and inclined plate type production whirlpool votex sheet 4, multiple angular production whirlpool votex sheets 3 in right angle are using horizontal center line axis as axial symmetry
Interlaced arrangement；The rear arrangement inclined plate type production whirlpool votex sheet 4 of angular production whirlpool votex sheet 3, two inclined plate types at last row right angle
It is one group to produce whirlpool votex sheet 4, is symmetrically distributed in the both sides of horizontal center line axis in splayed, and splay osculum direction is towards flue gas
Outlet 6, inclined plate type produce whirlpool votex sheet 4 and are not blocked staggeredly spatially with the angular production whirlpool votex sheet 3 in right angle；
The exhanst gas outlet section D is in gradually-reducing shape, and is tightly coupled after turbulent flow coalescence section C, and exhanst gas outlet 6 connects dedusting and sets
It is standby, and the angle between the wall surface of exhanst gas outlet section D and horizontal direction is 30~45 °, the width of exhanst gas outlet 6 and horizontal segment
Equivalent width.
It is homogeneous that apparatus of the present invention are further characterized by the distance between lower wall surface on the channel of each gas inlet 1
Deng.
The width that apparatus of the present invention are further characterized by horizontal segment be the sum of two 1 width of gas inlet 2/3-
5/6。
Apparatus of the present invention are further characterized by the initial flaring point of every grade of ladder flaring in turbulent flow coalescence section C in place
In the right angle in the horizontal extensions space of corresponding flaring ladder it is angular production whirlpool votex sheet 3 right-angled apices horizontal distance and hang down
Straight distance is respectively the 1/2 and 1/8 of horizontal segment width.
It is whole along flow of flue gas direction presentation central shaft that apparatus of the present invention are further characterized by the turbulent flow coalescence section C
Symmetrical 2~3 grades of stepped flaring shapes.During for two-stage flaring ladder, of the angular production whirlpool votex sheet 3 in right angle in turbulent flow coalescence section C
Number is five, and the number of inclined plate type production whirlpool votex sheet 4 is two.The angular production whirlpool votex sheet 3 in five right angles is divided into three row and arranges, and first
The angular production whirlpool votex sheet 3 in two right angles is classified as, in the space for the horizontal extensions for being arranged in first order flaring ladder, and with level
Central axis is arranged symmetrically；Second is classified as the angular production whirlpool votex sheet 3 in a right angle, is arranged in horizontal center line axis, and positioned at the
In the space of the flaring part of two level flaring ladder；Third is classified as the angular production whirlpool votex sheet 3 in two right angles, is arranged in second level flaring
In the space of the horizontal extensions of ladder, and arranged by near wall；Two inclined plate type production whirlpool votex sheets 4 are arranged in third and arrange it
Afterwards, each inclined plate type production whirlpool votex sheet 4 and horizontal direction are in 45 °.During for three-level flaring ladder, right angle angle in turbulent flow coalescence section C
The number of shape production whirlpool votex sheet 3 is eight, and the number of inclined plate type production whirlpool votex sheet 4 is two, and the angular production whirlpool votex sheet 3 in eight right angles divides
Cheng Wulie is arranged, identical when first three columns arrangement is with two-stage flaring ladder, and the 4th is classified as the angular production whirlpool votex sheet 3 in a right angle,
It is arranged in horizontal center line axis, and in the space of the flaring part of third level flaring ladder；5th is classified as two right angles
Angular production whirlpool votex sheet 3 in the space for the horizontal extensions for being arranged in third level flaring ladder, and is arranged by near wall；Two
Inclined plate type production whirlpool votex sheet 4 is arranged in after the 5th row.The flaring part of multistage flaring ladder and the common structure of horizontal extensions
Into tortuous wall surface 5.
During for two-stage flaring ladder, the right-angled apices of the angular production whirlpool votex sheet 3 in the right angle of secondary series to the right angle angle of first row
The horizontal distance of the right-angled apices of shape production whirlpool votex sheet 3 is the 1/2 of horizontal segment width, the front end of inclined plate type production whirlpool votex sheet 4 to the
The right-angled apices horizontal distance of the angular production whirlpool votex sheet 3 in right angle of two row is the 3/4 of horizontal segment width, inclined plate type production whirlpool votex sheet 4
Most short vertical range to horizontal center line axis is the 1/8 of horizontal segment width；Every grade of flaring width is the 1/ of horizontal segment width
4, the length of horizontal extension is respectively the 5/8 and 7/8 of horizontal segment width after the completion of two-stage flaring.
Apparatus of the present invention are further characterized by the angular production whirlpool votex sheet 3 in right angle in turbulent flow coalescence section C and are produced with inclined plate type
The fork arrangement of whirlpool votex sheet 4 is put, and is spatially interlocked and is not blocked.
Apparatus of the present invention are further characterized by the angular production whirlpool votex sheet 3 in right angle in turbulent flow coalescence section C and are produced with inclined plate type
The thickness of whirlpool votex sheet 4 is 2mm, and the width of the angular production whirlpool votex sheet 3 in right angle is the 1/4 of horizontal segment width, inclined plate type production whirlpool whirlpool
The length of piece 4 is the 1/4 of horizontal segment width.
Fine particle in flue gas is removed using the device that fine particle collision coalescence is grown up in above-mentioned reinforcing flue gas
Process be：
(1) by the high-temperature flue gas of desulphurization plant with the speed of 8-15m/s along both sides two smoke inlets 1 simultaneously into
Enter in device, flow to flue gas mixing collision section B；Under the action of both sides flue gas tilts injection, flue gas is at first on a horizontal axis
Violent collision occurs, the larger particles of fluidity difference is followed to increase near axis concentration, is conducive to improve between little particle
Collision frequency between little particle and bulky grain, with flue gas flow forward, in vertical direction from horizontal axis farther out
Flue gas layer is conducive to particulate matter collision and grows up, and horizontal because with adjacent flue gas layer interlayer collision occurs for the change of flow direction
Duan Kuandu is less than the sum of width of two gas inlets 1, the effect of decompressing speed-increasing is generated to flue gas, when flue gas flows through regular triangular prism
During turbulent element 2, the larger particles of near axis start to detach to both sides, generate shunting, flow-disturbing effect, make little particle it
Between, violent intersection-type collision occurs between bulky grain and little particle again, strengthen collision effect, while flow of flue gas speed again
Degree further increases, and forms jet stream, and very big velocity gradient is generated after regular triangular prism turbulent element 2, is formed a pair of symmetrical
The opposite whirlpool in direction of rotation, different diameter airborne particle are involved in whirlpool, are enhanced the interaction between particulate matter, are made particulate matter
First coalescence is grown up in whirlpool.
(2) flue gas after shunting initially enters turbulent flow coalescence section C：Turbulent flow coalescence section C is whole to be presented along flow of flue gas direction
On the one hand the stepped flaring shape of multistage substantially symmetrical about its central axis, the design of the wall structure can suitably reduce flow of flue gas speed,
Extend particulate matter in the residence time of turbulent flow coalescence section C, enhance the turbulent flow coalescence effect of fine particle, avoid particulate matter and led
Stream flue gas is taken away in time, and on the other hand the combination of the angular production whirlpool votex sheet 3 of the structure and neighbouring right angle, is conducive at tortuous wall surface
The whirlpool of different scale is generated, the contact area of flue gas and wall surface is also improved, is conducive to fine particle near wall flue gas
Turbulent flow coalescence grow up；Flue gas flows through the angular production whirlpool votex sheet 3 in right angle and the inclination that fork arrangement puts and (spatially interlocks and do not block)
Board-like production whirlpool votex sheet 4, the angular production whirlpool votex sheet 3 in each right angle and every group of 4 rear of inclined plate type production whirlpool votex sheet because of velocity gradient not
With that can form the whirlpool of different scale, whirlpool direction of rotation occurs in pairs on the contrary, different diameter airborne particle is involved in whirlpool again,
The collision frequency of particle is increased, is conducive to the particulate matter of the different-grain diameter further turbulent flow coalescence in whirlpool and grows up, centrifuging
The particulate matter that coalescence is grown up under the action of power follows flue gas flow direction exhanst gas outlet 6, while the issuable deposited particles of lower wall surface
Also it is blown by flue gas toward exhanst gas outlet 6.
(3) flue gas for flowing through turbulent flow coalescence section C enters exhanst gas outlet section D：Exhanst gas outlet section D is in for gradually-reducing shape, flue gas stream
Dynamic speed is increased, and under effect of inertia, further enhances touching between bulky grain and the little particle partly do not grown up fully
It hits, makes particle growth effect more notable, finally flow into cleaner (electric precipitator or bag filter etc.) with flue gas, so as to
Greatly improve the elimination efficiency of fine particle.
Embodiment 1
The present embodiment strengthens the device grown up of fine particle collision coalescence in flue gas, in the gas inlet section A, there are two
Gas inlet 1, two gas inlets 1 are arranged symmetrically to tilt, and the flow of flue gas direction of each gas inlet 1 is in horizontal direction
30 ° of angle, the tail portion of two gas inlets are connected；In flue gas mixing collision section B, including changeover portion and horizontal segment,
Changeover portion connection horizontal segment front end, changeover portion start contact-impact to the area of horizontal segment front end for flue gas in two gas inlets
Domain, changeover portion are in tapered configuration, and two gas inlets 1 and flue gas mixing collision section B are together to form " Y " character form structure, water
The width of flat section is the 2/3 of the sum of two 1 width of gas inlet, and section shape is disposed in the horizontal center line axis of the horizontal segment
Shape is the regular triangular prism turbulent element 2 of equilateral triangle, and the bottom surface length of side of regular triangular prism turbulent element is the 3/ of horizontal segment width
10, one vertex of regular triangular prism turbulent element is located in horizontal center line axis and towards gas inlet direction, positioned at horizontal centre
The distance of vertex to changeover portion front end on axis collides the 3/5 of section B length for flue gas mixing；The turbulent flow coalescence section C is whole
The stepped flaring shape of two-stage substantially symmetrical about its central axis is presented along flow of flue gas direction, every grade of flaring angle is 45 °, and flaring width is water
The 1/4 of flat section width, the length of horizontal extension is respectively the 5/8 and 7/8 of horizontal segment width after the completion of two-stage flaring, is gathered in turbulent flow
And there are five the angular production whirlpool votex sheet 3 in right angle and two inclined plate type production whirlpool votex sheets 4, the angular production whirlpool whirlpools in five right angles for setting in section C
Piece 3 is using horizontal center line axis as axial symmetry interlaced arrangement, and at last row right angle, hang plate is arranged at the rear of angular production whirlpool votex sheet 3
Formula produces whirlpool votex sheet 4, and for each inclined plate type production whirlpool votex sheet 4 with horizontal direction in 45 °, two inclined plate type production whirlpool votex sheets 4 are one group,
The both sides of horizontal center line axis are symmetrically distributed in splayed, splay osculum direction is produced towards exhanst gas outlet 6, inclined plate type
Whirlpool votex sheet 4 does not block staggeredly spatially with the angular production whirlpool votex sheet 3 in right angle；Every grade of ladder flaring is initial in turbulent flow coalescence section C
Flaring point to positioned at corresponding flaring ladder horizontal extensions space in right angle it is angular production whirlpool votex sheet 3 right-angled apices water
Flat distance and vertical range are respectively the 1/2 and 1/8 of horizontal segment width, the right angle top of the angular production whirlpool votex sheet 3 in right angle of secondary series
The horizontal distance of the right-angled apices of the angular production whirlpool votex sheet 3 in right angle of point to first row is the 1/2 of horizontal segment width, inclined plate type production
The right-angled apices horizontal distance of the angular production whirlpool votex sheet 3 in right angle of the front end of whirlpool votex sheet 4 to secondary series is the 3/4 of horizontal segment width,
The most short vertical range of inclined plate type production whirlpool votex sheet 4 to horizontal center line axis is the 1/8 of horizontal segment width；The exhanst gas outlet section
D is in gradually-reducing shape, and is tightly coupled after turbulent flow coalescence section C, and exhanst gas outlet 6 connects cleaner, and the wall surface of exhanst gas outlet section D
Angle between horizontal direction is 30 °, the width of exhanst gas outlet 6 and the equivalent width of horizontal segment.
In the present embodiment, described device total length is 2350mm, thickness 500mm, and 1 width of gas inlet is
300mm, flue gas mixing collision section B length are 800mm, and horizontal segment width is 400mm, the length of the exhanst gas outlet section D
For 350mm, the width of the angular production whirlpool votex sheet 3 in right angle is 100mm, quantity is 5, and inclined plate type produces the length of whirlpool votex sheet 4
For 100mm, quantity is 2.
The flue gas of the present embodiment is obtained from the flue before certain power plant's cleaner, and trappable particle size range is
0.021-6.393 microns, wherein granule number of the grain size between 0.021-0.2 micron is in the majority, and number density is about sum
95%.
Fig. 3 be the present embodiment flue gas in speed vector figure of the particulate matter in described device, Fig. 4 be regular triangular prism flow-disturbing
Element and the velocity vector enlarged drawing of votex sheet part.It can be seen from the figure that in flue gas mixes collision section B, particulate matter is in water
On flat axis and violent collision occurs for flue gas interlayer, and the width of horizontal segment is less than the sum of width of two gas inlets 1,
Particulate matter speed is also increasing, and grows up for particulate matter collision and provides advantage, when flowing through regular triangular prism turbulent element 2, water
The particulate matter of flat near axis is detached to both sides, generates shunting, flow-disturbing effect, make between little particle, bulky grain and little particle it
Between violent intersection-type collision occurs again, strengthen collision effect again, regular triangular prism turbulent element about 2 both sides because of runner
Narrow, particulate matter speed is made to increase severely, the velocity gradient for causing 2 rear surface of regular triangular prism turbulent element larger makes different-grain diameter
Grain object increases the interaction between particulate matter, particulate matter first coalescence in whirlpool is made to grow up, is gathered in turbulent flow with vortex movement
And in section C, the structure design of upper lower wall surface, flow of flue gas speed is suitably reduced, and extends particulate matter turbulent flow coalescence section C's
Residence time enhances the turbulent flow coalescence effect of fine particle, avoids particulate matter and taken away in time by main flume, and in complications
The whirlpool of different scale is generated at wall surface 5, also improves the contact area of flue gas and wall surface, is conducive to thin near wall flue gas
The turbulent flow coalescence of particulate matter is grown up.Flue gas flows through the angular production whirlpool votex sheet 3 in right angle that fork arrangement puts and (spatially interlocks and do not block)
Whirlpool votex sheet 4 is produced with inclined plate type, each angular production whirlpool votex sheet 3 in right angle and every group of inclined plate type production 4 rear of whirlpool votex sheet are because of speed ladder
The difference of degree can form the whirlpool of different scale, and whirlpool direction of rotation occurs in pairs on the contrary, different diameter airborne particle is rolled up again
Into whirlpool, the collision frequency of particle is increased, is conducive to the particulate matter of the different-grain diameter further turbulent flow coalescence in whirlpool and grows up,
Achieve the purpose that fine particle is fully grown up in flue gas at each spatial positions of turbulent flow coalescence section C, gathers under the influence of centrifugal force
And the particulate matter grown up follows flue gas flow direction exhanst gas outlet 6, shape is tapered exhanst gas outlet section D so that flow of flue gas speed
Another is increased, and under effect of inertia, further enhances touching between bulky grain and the little particle partly do not grown up fully
It hits, makes particle growth effect more notable.There is different phase different speed to also provide enhanced what particulate matter collision coalescence was grown up
Effect.
Fig. 5 is the distribution map of the present embodiment flue gas import and export grain diameter and number density percentage.It can from figure
Go out, in initial particle distribution, little particle number density percentage accounting is higher, i.e., 0.021 micron -0.283 micron number density hundred
Ratio is divided to reach 95%, after the device collides coalescence, in exhanst gas outlet particle size distribution, less than 0.283 micron little particle
Number density percentage is remarkably decreased, almost nil, and larger particles number density percentage significantly improves, wherein 2.26 micron particles
It is 32.84% that object number density percentage, which is in peak-peak, and 6.393 microns of particulate count density percentage also reaches
9.42%, be conducive to the capture of cleaner, so as to substantially increase the elimination efficiency of fine particle in fire coal boiler fume.
The device that fine particle collision coalescence is grown up in the reinforcing flue gas of the present invention, simple and compact for structure, each stage space
It is rationally distributed, it be combined with each other to reach fine particle and collide coalescence using turbulent element, production whirlpool votex sheet and apparatus structure and grow up preferably
Effect, without the input of additional-energy, investment and operating cost are low, and need to only be mounted on before cleaner, therefore have
Preferable application prospect.
The present invention does not address part and is suitable for the prior art.
Claims (9)
1. a kind of strengthen the device that fine particle collision coalescence is grown up in flue gas, which is touched by gas inlet section, flue gas mixing
Hit section, turbulent flow coalescence section, four part of exhanst gas outlet section composition；There are two gas inlets, feature in the gas inlet section to exist
In：Described two gas inlets are arranged symmetrically to tilt, the flow of flue gas direction of each gas inlet and horizontal direction in 20 ° ~
35 ° of angle, the tail portion of two gas inlets are connected；
The flue gas mixing collision section includes changeover portion and horizontal segment, and changeover portion connection horizontal segment front end, changeover portion is two cigarettes
Flue gas starts contact-impact to the region of horizontal segment front end in gas import, and changeover portion is in tapered configuration, two gas inlets and cigarette
Gas mixing collision section is together to form " Y " character form structure, and the width of horizontal segment is less than the sum of two gas inlet width；The water
The regular triangular prism turbulent element that cross sectional shape is equilateral triangle, regular triangular prism flow-disturbing are disposed in the horizontal center line axis of flat section
One vertex of element is located in horizontal center line axis and towards gas inlet direction；
The turbulent flow coalescence section is whole, and the stepped flaring shape of multistage substantially symmetrical about its central axis, every grade of flaring are presented along flow of flue gas direction
Angle is 45 ~ 60 °, including flaring part and horizontal extensions；The angular production whirlpool in multiple right angles is provided in turbulent flow coalescence section
Votex sheet and inclined plate type production whirlpool votex sheet, multiple angular production whirlpool votex sheets in right angle are using horizontal center line axis as axial symmetry interlaced arrangement；
The rear arrangement inclined plate type production whirlpool votex sheet of the angular production whirlpool votex sheet in last row right angle, two inclined plate type production whirlpool votex sheets are one
Group, is symmetrically distributed in the both sides of horizontal center line axis in splayed, and splay osculum direction is towards exhanst gas outlet, inclined plate type
Production whirlpool votex sheet does not block staggeredly spatially with the angular production whirlpool votex sheet in right angle；
The exhanst gas outlet section is in gradually-reducing shape, and is tightly coupled after turbulent flow coalescence section, exhanst gas outlet connection cleaner, and cigarette
Angle between the wall surface and horizontal direction of gas outlet section is 30 ~ 45 °, the width of exhanst gas outlet and the equivalent width of horizontal segment.
2. according to claim 1 strengthen the device that fine particle collision coalescence is grown up in flue gas, it is characterised in that horizontal
The width of section is 2/3-the 5/6 of the sum of two gas inlet width.
3. according to claim 1 strengthen the device that fine particle collision coalescence is grown up in flue gas, it is characterised in that each
The distance between lower wall surface is equal on the channel of gas inlet.
4. according to claim 1 strengthen the device that fine particle collision coalescence is grown up in flue gas, which is characterized in that in rapids
The initial flaring point for flowing every grade of ladder flaring in coalescence section is straight in the horizontal extensions space of corresponding flaring ladder to being located at
The horizontal distance and vertical range of the right-angled apices of the angular production whirlpool votex sheet in angle are respectively the 1/2 and 1/8 of horizontal segment width, and every grade gradually
Broadening degree is the 1/4 of horizontal segment width.
5. according to claim 1 strengthen the device that fine particle collision coalescence is grown up in flue gas, it is characterised in that described
Turbulent flow coalescence section is whole, and 2 ~ 3 grades of stepped flaring shapes substantially symmetrical about its central axis are presented along flow of flue gas direction.
6. according to claim 5 strengthen the device that fine particle collision coalescence is grown up in flue gas, which is characterized in that is two
During grade flaring ladder, the length of horizontal extension is respectively 5/8 He of horizontal segment width after the completion of two-stage flaring in turbulent flow coalescence section
7/8, the number of the angular production whirlpool votex sheet in right angle is five, and the number of inclined plate type production whirlpool votex sheet is two；Five angular productions in right angle
Whirlpool votex sheet is divided into three row arrangement, and first is classified as the angular production whirlpool votex sheet in two right angles, and the level for being arranged in first order flaring ladder is prolonged
In the space of long part, and it is arranged symmetrically with horizontal center line axis；Second is classified as the angular production whirlpool votex sheet in a right angle, is arranged in water
On flat central axis, and in the space of the flaring part of second level flaring ladder；Third is classified as the angular production whirlpool in two right angles
Votex sheet, in the space for the horizontal extensions that second level flaring ladder is arranged symmetrically in horizontal center line axis, and by near wall
Arrangement；Two inclined plate type production whirlpool votex sheets are arranged in after third row, and each inclined plate type production whirlpool votex sheet is in horizontal direction
45°。
7. according to claim 6 strengthen the device that fine particle collision coalescence is grown up in flue gas, which is characterized in that is two
During grade flaring ladder, the right angle of right-angled apices to the first row of the angular production whirlpool votex sheet in right angle of secondary series is angular to produce the straight of whirlpool votex sheet
The horizontal distance of angular vertex is the 1/2 of horizontal segment width, and inclined plate type produces the angular production in right angle of front end to the secondary series of whirlpool votex sheet
The right-angled apices horizontal distance of whirlpool votex sheet be horizontal segment width 3/4, inclined plate type produce whirlpool votex sheet to horizontal center line axis most
Short vertical range is the 1/8 of horizontal segment width.
8. according to claim 1 strengthen the device that fine particle collision coalescence is grown up in flue gas, which is characterized in that positive three
The bottom surface length of side of prism turbulent element be horizontal segment width 3/10, the vertex to changeover portion front end in horizontal center line axis
Distance for flue gas mixing collision segment length 3/5.
9. according to claim 1 strengthen the device that fine particle collision coalescence is grown up in flue gas, which is characterized in that turbulent flow
The angular production whirlpool votex sheet in right angle is put with inclined plate type production whirlpool votex sheet fork arrangement in coalescence section.
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| CN109529622A (en) * | 2019-01-16 | 2019-03-29 | 北京工大环能科技有限公司 | One kind being used for more gas internal-combustion engine flue gas tail portion denitrating systems |
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| CN116510419A (en) * | 2022-12-01 | 2023-08-01 | 大连理工大学盘锦产业技术研究院 | V-shaped flow control particle coalescence device with coaxial speed difference jet flow |
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