CN105749690B - Promote the device and method that fine particle interacts in fire coal boiler fume - Google Patents
Promote the device and method that fine particle interacts in fire coal boiler fume Download PDFInfo
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- CN105749690B CN105749690B CN201610278398.4A CN201610278398A CN105749690B CN 105749690 B CN105749690 B CN 105749690B CN 201610278398 A CN201610278398 A CN 201610278398A CN 105749690 B CN105749690 B CN 105749690B
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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
- 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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Abstract
The present invention relates to promote the device and method that fine particle interacts in fire coal boiler fume, it is characterized in that the device includes rectangular channel, scaling aditus laryngis, turbulent flow reunion room and exhanst gas outlet, the rectangular channel is smoke inlet, the scaling aditus laryngis includes tapered portion and flaring part, tapered portion is connected with rectangular channel, flaring part is connected with turbulent flow reunion room one end, and the other end of turbulent flow reunion room is provided with exhanst gas outlet, and exhanst gas outlet is connected with follow-up cleaner；The turbulent flow reunion interior is provided with a number of rectangular fin, each two rectangular fin is one group, shared n groups, and n >=2, every group of two rectangular fins are in "eight" shape, "eight" shape osculum end is sequentially arranged in turbulent flow reunion interior towards flue gas direction of flow, n groups rectangular fin along flue gas direction of flow；The rectangular fin and the angle that flue gas direction of flow is in 20 ~ 60, turbulent flow reunion room ratio of diameter at the length of width with the aditus laryngis of scaling aditus laryngis is 6:5.
Description
Technical field
The present invention relates to the removing sulfuldioxide of fine particle in coal-fired flue-gas, and in particular to promotes in fire coal boiler fume thin
The device and method of grain thing interaction.
Background technology
Pellet (PM10) refer to that aerodynamic diameter is less than or equal to 10 μm of fine particle, particularly wherein
Comprising PM2.5Serious atmospheric environment problem is had resulted in, causes the great attention in China.PM2.5Harm be, grain
Footpath is small, and specific surface area is big, the harmful substance such as easy viral adsorption, bacterium, into human body after can in alveolar formed deposit, trigger
Respiratory disease and heart and lung diseases, harm to the human body are very big；Meanwhile the holdup time is long in an atmosphere, transmission distance for fine particle
From remote, after the fine particle containing sulfate and nitrate enters cloud water or precipitation system, it is most likely that promote the acidifying of precipitation,
Strong influence also result in atmospheric environment.
Related data shows, PM in China's air2.5The principal element of concentration increase is substantial amounts of soot emissions, and flue dust
The 70% of discharge comes from coal burning, and coal-fired power plant is the main place of coal consumption again.Coal-fired process produces substantial amounts of
Dust, existing cleaner is mainly using electrostatic precipitator, sack cleaner and Wetting electrostatic cleaner etc., to removing grain
Footpath larger particles efficiency is higher, and quality removal efficiency can reach more than 99%；It is but existing to remove to the less fine particle of particle diameter
Dirt equipment is relatively low to its capture rate, if in quantitative terms, still have more than 90% fine grained for accounting for dust total quantity be not removed and
Into ambient air, although its shared mass fraction is smaller, enormous amount, it is more easy to be absorbed by the body, causes high risks.It is dry
Method, semidry method and wet process of FGD are also only capable of suppressing coarse grained discharge, to PM2.5Difficulty is trapped Deng fine grained, and is passed through
After crossing wet method fume desulfurizing system, new fine particle can be also produced to a certain extent, further increases PM2.5Discharge.
At present, physics and chemical method are mainly used in the research to Combustion Source fine particle control technology both at home and abroad, promote fine grained
The long greatly larger particles, then be processed to by traditional cleaner of thing reunion, the removing effect to fine particle can be effectively improved
Fruit.
Agglomeration techniques main at this stage include acoustic agglomeration technology, magnetic coagulation technology, steam phase transforming agglomeration techniques, coagulation
And technology, chemical agglomeration technology and turbulent flow agglomeration techniques etc., but the problem of different degrees of all be present：Acoustic agglomeration energy consumption mistake
Height, and produce larger noise；Magnetic coagulation technology and steam phase transforming agglomeration techniques are required to fine particle and possess corresponding thing
Manage characteristic；Electric coagulating technique depends primarily on the factors such as particle concentration, particle diameter, distribution of charges and electric-field intensity, agglomerating effect
Preferably, it is few still in experimental study stage, commercial Application at present however, due to the microcosmic property and complexity of fine particle；Change
Learning agglomeration techniques needs to configure the agglomeration promotor of specific acidity, concentration, preparation and absorption fine grained due to chemical reagent
It is more difficult in terms of the processing of harmful element after thing；Comparatively, turbulent flow agglomeration techniques utilize caused vortex in flow of flue gas
Structure, the particulate matter of different-grain diameter are assembled in the different zones of whirlpool, and the larger particle of particle diameter is because inertia is in whirlpool boundary current
Move or be thrown out of whirlpool, the smaller particulate matter of particle diameter is then easily inhaled in whirlpool center by volume, forms larger concentration accumulation regions, this is just
Add the possibility collided and interacted between different diameter airborne particle.
Li Yunfei (Li Yun flies research [D] the Harbin Institute of Technology .2014 that flue gas fine particles turbulent flow is reunited) is proposed
A kind of new turbulence coagulation device.The turbulence coagulation device is that turbulator member is set in rectangular channel, it is contemplated that flow-disturbing cylinder
The whirlpool of large scale can be produced, votex sheet can produce the whirlpool of small yardstick, therefore install two flow-disturbing cylinders arranged side by side in rectangular flue, with
The whirlpool of large scale is produced, 4 × 6 " ten " font votex sheet is installed after cylinder, to produce small whirlpool.Its weak point is " ten " font
The use of part increases flue resistance, is unfavorable for flow of flue gas, and to reduce this defect can increase equipment volume again, and cost increases
Add.
The patent of invention of Application No. 201010504951.4 disclose it is a kind of promote particulate matter interaction device and
Method, this method by incoming flue gas by diversion column by fluid partitioning into different runners, into equipped with many convex or concaves
Production whirlpool votex sheet reunion chamber in, promote fine particle to collide reunions by votex sheet detour flow, it is said that can reach well
Agglomerating effect.Although waveform votex sheet can reduce flow passage resistance force of waterproof, fluid velocity graded is smaller, and production whirlpool effect is poor,
Agglomerating effect is caused to depend on votex sheet quantity；Votex sheet requirement on machining accuracy is high simultaneously, adds the input cost of equipment.
The content of the invention
In view of the shortcomings of the prior art, the technical problem that the present invention intends to solve is to provide a kind of promotion fire coal boiler fume
The device and method of middle fine particle interaction.The device considers that turbulent flow is insufficient existing for reuniting, and passes through and installs vortex hair additional
On the basis of raw device (the present embodiment is rectangular fin) ensures turbulence effects, resistance is flowed caused by avoiding turbulent flow votex sheet as far as possible
Power, injection stream and vortex generator induction whirlpool technology being employed, has equipment simple, delicate structure, production whirlpool effect is good,
The characteristics of removal efficiency is high.
This method is used for fine particle in the high-temperature flue gas after the processing of dry method, semidry method and wet process of FGD
Removing, install vortex generator additional simultaneously using the rational deployment of device each several part, incoming flue gas is mixed in rectangular channel,
Scale and accelerate at the aditus laryngis of aditus laryngis, in the presence of vortex generator, the flue gas by acceleration can produce larger velocity gradient,
Promote the generation of whirlpool, induce fine particle Local enrichment, and then add the probability of particles collision, reach fine particle reunion
For the effect of larger particles.
The present invention solves the technical problem and adopted the technical scheme that：
The device that fine particle interacts in a kind of promotion fire coal boiler fume, it is characterised in that the device includes rectangle
Passage, scaling aditus laryngis, turbulent flow reunion room and exhanst gas outlet, the rectangular channel are smoke inlet, and the scaling aditus laryngis is included gradually
Contracting part and flaring part, tapered portion are connected with rectangular channel, and flaring part is connected with turbulent flow reunion room one end, and turbulent flow is reunited
The other end of room is provided with exhanst gas outlet, and exhanst gas outlet is connected with follow-up cleaner；The turbulent flow is reunited indoor provided with some
The rectangular fin of quantity, each two rectangular fin are one group, share n groups, and n >=2, every group of two rectangular fins are in " eight " word
Shape, towards flue gas direction of flow, n groups rectangular fin is sequentially arranged in turbulent flow along flue gas direction of flow and reunited at "eight" shape osculum end
It is indoor；The rectangular fin and the angle that flue gas direction of flow is in 20~60 °, length and contracting of the turbulent flow reunion room in width
The ratio for putting diameter at the aditus laryngis of aditus laryngis is 6:5.
A kind of method that fine particle interacts in promotion fire coal boiler fume, this method use said apparatus, specifically
Step is：By the high-temperature flue gas of dry method, semidry method or wet method fume desulfurizing system, into rectangular channel in fully screened
Mixing；Then, flue gas enters scaling aditus laryngis, produces jet effect；It is in "eight" shape by one group subsequently into turbulent flow reunion room
The rectangular fin being arranged symmetrically, because the flow-disturbing of rectangular fin acts on, flow field produces velocity gradient, and then at rectangular fin rear
Produce a pair symmetrically and the opposite vortex of speed, particle occur mutually collision and reunited, increase fine grained granularity, when
Grain increase to a certain extent, is flowed to main flume in the presence of inertia and exported, non-aggregated fine grained passes through second group of square
Shape fin, further hit against reunion；Little particle is reunited with whirlpool, and bulky grain flows out with inertia, is moved in circles, and is finally gone out through flue gas
Mouth is removed by deduster.
Compared with prior art, the beneficial effects of the invention are as follows：
1st, apparatus of the present invention make to enter rectangular channel using the vortex in rectangular channel (before scaling aditus laryngis) at up-and-down boundary
Incoming flue gas produce compared with Maelstrom, not only can be sufficiently mixed the particle of different-grain diameter in flue gas, and make whirlpool center
Part fine particle, which is formed, reunites.
2nd, the scaling aditus laryngis in apparatus of the present invention is made by well-mixed incoming cigarette using the spout structure design of scaling shape
Gas decrease temperature and pressure speedup at aditus laryngis, reach jet effect, promote that heterogeneous nucleating occurs between the vapor in flue gas and particle,
Change the property of particle surface, dust granules is changed into hydrophilic particles, improve be attached to each other between particle, coalescence it is general
Rate；
3rd, turbulent flow of the present invention is reunited indoor installation rectangular fin, in rectangular fin rear vertical in can be produced on flow direction
Raw a pair almost symmetrical but flow to opposite whirlpool, that is, flows to whirlpool.The less particle of particle diameter is being flowed near whirlpool with flow direction
Localized clusters, collision and reunion are produced, the presence for flowing to whirlpool extends residence time of the particulate matter in this region, and bulky grain
Because effect of inertia breaks away from vortices entrain, flowed out with the flue gas of flow direction, little particle continues to rotate, can realized to particle
Selection and coalescence, so as to ensure that the removal effect of particle.
4th, rectangular channel of the present invention, scaling aditus laryngis, turbulent flow reunion room, integral layout is reasonable, and front and rear contact is close；Incoming cigarette
Gas accelerates by screening mixing early stage, jet, strengthens disturbance, improve agglomerating effect；Meanwhile apparatus structure is simple, operation side
Just, no-movable part, before cleaner in industrial processes, combined with high-effective dust-removing equipment, fired without changing
The dedusting structure of coal-fired plant, there is good future in engineering applications.
The present invention sets multigroup rectangular fin, is advantageous to the enhancing of agglomerating effect, and it is poor to overcome production whirlpool to a certain extent
The defects of；Using the combination for scaling aditus laryngis and the rectangular fin of "eight" shape distribution, fine particle first passes around scaling aditus laryngis, produces
Raw decompression cooling accelerating function, promotes that heterogeneous nucleating occurs between the vapor in flue gas and particle, changes particle surface
Property, dust granules are made to be changed into hydrophilic particles, the particulate matter after then accelerating passes through the rectangular fin of "eight" shape distribution
Shunting action, produce larger velocity gradient, strengthen production whirlpool effect, so improve particulate matter Local enrichment, collision it is general
Rate, reach good agglomerating effect, overcome and pass through votex sheet by inlet velocity merely in the prior art, reduction velocity gradient and
Caused by produce whirlpool effect difference the defects of.
Brief description of the drawings
Fig. 1 is a kind of three-dimensional knot for embodiment of device that the present invention promotes that fine particle interacts in fire coal boiler fume
Structure schematic diagram；
Fig. 2 is the vertical view knot that the present invention promotes a kind of embodiment of device that fine particle interacts in fire coal boiler fume
Structure schematic diagram；
Fig. 3 is the velocity that the present invention promotes the device endoparticle that fine particle interacts in fire coal boiler fume
Figure；
Fig. 4 is a kind of rectangular-wing of embodiment of device that the present invention promotes that fine particle interacts in fire coal boiler fume
Particle speed vector partial enlarged drawing near piece；
Fig. 5 is the coal-fired pot that the present invention promotes a kind of embodiment of device that fine particle interacts in fire coal boiler fume
Particle diameter distribution comparison diagram before and after the removing means reunion of kiln gas fine particle.
In Fig. 1：1- rectangular channels；2- scales aditus laryngis；3- turbulent flow reunions room；31- rectangular fins；4- exhanst gas outlets.
Embodiment
The present invention is described in detail with reference to embodiment and accompanying drawing, but not in this, as to the application right
The restriction of claimed scope.
The present invention promotes device (abbreviation device, referring to Fig. 1-2) bag that fine particle interacts in fire coal boiler fume
Include rectangular channel 1, scaling aditus laryngis 2, turbulent flow reunion room 3 and exhanst gas outlet 4, the rectangular channel 1 is smoke inlet, the scaling
Aditus laryngis 2 includes tapered portion and flaring part, and tapered portion is connected with rectangular channel 1, flaring part and the one end of turbulent flow reunion room 3
Connection, the other end of turbulent flow reunion room 3 are provided with exhanst gas outlet 4, and exhanst gas outlet 4 is connected with follow-up cleaner；The turbulent flow
A number of rectangular fin 31 is provided with reunion room 3, each two rectangular fin is one group, shares n groups, and n >=2, every group
Two rectangular fins 31 are in "eight" shape, and "eight" shape osculum end is towards flue gas direction of flow, and n groups rectangular fin is along flue gas incoming
Direction is sequentially arranged in turbulent flow reunion room 3；The rectangular fin 31 and the angle that flue gas direction of flow is in 20~60 °, turbulent flow
The ratio of diameter at the length of width with the aditus laryngis of scaling aditus laryngis of reunion room 3 is 6:5.
Further characteristic of the invention be rectangular fin 31 the length of length direction and width ratio be 4:1~6:
1.During actual industrial production, the operating load of boiler is not less than 60%, the speed of incoming flue gas under different load,
Grain number amount can all change, according to the topology layout of the turbulent flow reunion room 3 of apparatus of the present invention, when flow velocity is smaller, Ke Yishi
When the length-width ratio for reducing rectangular fin, when flow velocity is larger, it can suitably increase the length-width ratio of rectangular fin.Consider flue gas
Flow velocity is 4 in the length of length direction and width ratio with apparatus of the present invention production whirlpool effect, rectangular fin 31:1~6:1 timeliness
Fruit is preferable, and especially rectangular fin is 5 in the length of length direction and width ratio:When 1, best results.Reunite in turbulent flow
Interior, rectangular fin crosses conference in the length of length direction and width ratio causes rectangular fin width smaller, and fluid occurs
Flow-disturbing is unfavorable for the generation of whirlpool；Too small, i.e., width is excessive, can block runner, increases flow resistance.
Further characteristic of the invention is that the length direction of turbulent flow reunion room 3 is with the length ratio on width
2.5~3.5:1；The ratio of rectangular channel 1 in length and width directions is 0.5-0.9, is scaled on the width of aditus laryngis 2
Dimension reference rectangular channel dimensional parameters, and (scale at aditus laryngis 2 width minimum) diameter at aditus laryngis and rectangular channel is wide
The ratio between degree is 10：19.
Further characteristic of the invention is that the quantity of the rectangular fin is 4-6, common 2-3 groups.
The present invention promotes the method that fine particle interacts in fire coal boiler fume, and this method uses said apparatus, has
Body step is：By the high-temperature flue gas of dry method, semidry method or wet method fume desulfurizing system, carried out fully into rectangular channel 1 is interior
Screening mixing；Then, flue gas enters scaling aditus laryngis 2, produces jet effect；Subsequently into turbulent flow reunion room 3, it is in by one group
The rectangular fin that "eight" shape is arranged symmetrically, because the flow-disturbing of rectangular fin acts on, flow field produces velocity gradient, and then in rectangle
The vortex that fin rear produces a pair symmetrically and speed is opposite, particle occur mutually collision and reunited, and make fine grained granularity
Increase, when particle increase to a certain extent, in the presence of inertia with main flume flow to export, non-aggregated fine grained pass through
Second group of rectangular fin, further hits against reunion；Little particle is reunited with whirlpool, and bulky grain flows out with inertia, is moved in circles, finally
Removed through exhanst gas outlet 4 by deduster.
Rectangular channel 1 is used for the particulate matter for screening various particle diameters in incoming flue gas in the present invention, and incoming flue gas is due to temperature
Higher, it is larger to may result in little particle buoyancy lift, in order to avoid this possibility, and because little particle followability is preferable, institute
Using the vortex at the up-and-down boundary of rectangular channel 1, to make enrichment caused by little particle, collision, certain reunion, certain journey occur
The particle diameter for entering scaling aditus laryngis 2 is set to differ smaller on degree, particle size distribution is more uniform；Scaling aditus laryngis 2 can make incoming cigarette
Gas realizes jet；Install rectangular fin 31 in turbulent flow reunion room 3 additional, for producing vortex in flow field, increase holdup,
Strengthen fine particle agglomerating effect, rectangular fin 31 is also known as vortex generator.Rectangular channel, scaling aditus laryngis, turbulent flow reunion room
By being closely joined together successively, package unit is formed, and be connected to before dust arrester entrance by fastener.
The present invention based on the recognition that：There is different quality, the fine grained of different aerodynamic sizes in incoming flue gas
Thing, the particulate matter of different-grain diameter is different to the turbulent structure followability of different scale, i.e., has the rapids for determining size in convection body
There are different movement effects in stream whirlpool, and the degree that fine particle is involved in by turbulence vortex is different.Therefore, fine particle is by turbulent flow
Behind whirlpool, movement locus will change, and add the fine particle collision of different-grain diameter and the probability reunited.
The position that the group spacing of every group of rectangular fin needs to meet the installation of rear set rectangular fin in the present invention will not be broken
It is foundation to flow to whirlpool caused by bad above one group of rectangular fin.But organize number and group spacing is unsuitable excessive.Number is more to produce for group
More vortex street simultaneously increases the particulate matter residence time, because vortex generator is arranged in turbulent flow reunion room 3, so vortex occurs
The size of device group spacing also directly affects the size of reunion room, but installation can excessively increase flue resistance, and spacing is excessive, can increase
Unnecessary size, increase equipment cost.According to actual requirement, consider and determine rectangular fin group number, initial group spacing is not small
Different according to installation group number thereafter in 100mm, group spacing is with flow velocity according to distribution of successively decreasing successively.
The present invention promotes the device of fine particle interaction in fire coal boiler fume to fine grained in coal-fired plant flue gas
The removing principle and process of thing are as follows：By the high-temperature flue gas of dry method, semidry method or wet method fume desulfurizing system, with certain stream
Speed, which enters in rectangular channel 1, carries out fully screening mixing, is well mixed the fine particle of each particle diameter, then, flue gas enters
Aditus laryngis 2 is scaled, pressure reduces, and speed increase, produces jet effect, thereafter by one group of rectangle being arranged symmetrically in "eight" shape
Fin 31, due to rectangular fin flow-disturbing act on, flow field produce velocity gradient, and then rectangular fin rear produce a pair it is mutual
Symmetrical and opposite speed vortex, that is, the higher impingement region of high turbulence, fine particle concentration is produced, because fine grained has
Good followability, therefore the presence being vortexed adds the residence time of particle and forms high concentration region, and mutually collision occurs and reunites,
Make fine grained granularity increase, when particle increase to a certain extent, in the presence of inertia with main flume flow to export, it is non-aggregated
Fine grained pass through second group of rectangular fin, further hit against reunion.Little particle is reunited with whirlpool, and bulky grain flows out with inertia,
Move in circles, and then add the number density percentage composition of the particulate matter of greater particle size in exhanst gas outlet 4, finally taken off by deduster
Remove.
The improvement of the inventive method is that incoming flue gas passes through can when the entrance of rectangular channel is with rectangular channel 1
Form convex expand to flow, caused whirlpool can carry out initial screening to the particulate matter in incoming flue gas, make the less particulate matter of particle diameter
Reunite, and then the particle size for entering scaling aditus laryngis 2 is differed smaller, particle size distribution is more uniform；Then, it is different
The particulate matter of particle diameter decrease temperature and pressure speedup, fine particle at scaling aditus laryngis 2 occur to a certain extent with the aqueous vapor in flue gas
Heterogeneous nucleating, particle is set to be converted into hydroaropic substance, the collision be advantageous between particle is reunited；Meanwhile by the particle of acceleration
Larger velocity gradient can be produced after votex sheet, promotes the generation being vortexed, strengthens the Local enrichment of particle, improves collision, group
Poly- effect.
Embodiment 1
The present embodiment promotes the device that fine particle interacts in fire coal boiler fume to include rectangular channel 1, scaling larynx
Mouth 2, turbulent flow reunion room 3 and exhanst gas outlet 4, the rectangular channel 1 are smoke inlet, and the scaling aditus laryngis 2 includes tapered portion
With flaring part, tapered portion is connected with rectangular channel 1, and flaring part is connected with the one end of turbulent flow reunion room 3, turbulent flow reunion room 3
The other end be provided with exhanst gas outlet 4, exhanst gas outlet 4 is connected with follow-up cleaner；It is provided with the turbulent flow reunion room 3 some
The rectangular fin 31 of quantity, each two rectangular fin are one group, share n groups, and n >=2, every group of two rectangular fins 31 are in
"eight" shape, "eight" shape osculum end are sequentially arranged in rapids towards flue gas direction of flow, n groups rectangular fin along flue gas direction of flow
Flow in reunion room 3；The rectangular fin 31 and the angle that flue gas direction of flow is in 30 °, two rectangular fins form "eight" shape
Turbulent flow reunion interior is installed on, the ratio of diameter at the length of width with the aditus laryngis of scaling aditus laryngis of turbulent flow reunion room 3 is
6:5。
The quantity of rectangular fin 31 is 4 in turbulent flow reunion room 3 described in the present embodiment, totally 2 groups, i.e. n=2, the rectangle
Fin 31 is 5 in the length of length direction and width ratio:1 rectangle wearing plate is made；Initial group spacing is 110mm.
The size of rectangular channel 1 is 100mm × 190mm × 209mm；A diameter of 100mm at the aditus laryngis of aditus laryngis 2 is scaled, it is long
Height is respectively 150mm, 209mm, and the size of turbulent flow reunion room 3 is 350mm × 120mm × 209mm, two above and below turbulent flow reunion room
The rectangular opening that size is 55mm × 15mm is opened up according to the arrangement of rectangular fin 31 on individual surface, wherein, rectangular fin 31
Length, width and height be respectively 209mm × 50mm × 10mm, two rectangular fins are arranged symmetrically, formed "eight" shape structure, form one
Group.
The present embodiment incoming flue gas is obtained from the flue before certain plant dust catcher.By in the low ram measure flue gas of electrostatic
Granulometric range, particle size distribution between 0.021 μm -6.256 μm, wherein 96% particle be in 0.021 μm -0.2 μm
Between.Cigarette temperature can reach 150 DEG C, and incoming flue gas enters rectangular channel with 13m/s speed, and the particle of different-grain diameter yardstick fills
Divide mixing, produce jet effect into scaling aditus laryngis 2, speed increases to 21m/s, and the flue gas after decompression acceleration is reunited into turbulent flow
Room 3, in the presence of rectangular fin 31, produce vortex street and assemble, collision frequency can be increased by producing vortex street, significantly strengthen reuniting
Effect.
Fig. 3 is the speed vector figure of particle in the present embodiment device, from figure 3, it can be seen that incoming flue gas flows into rectangle
In passage 1, due to the influence of fluidic architecture, incoming flue gas pressure at aditus laryngis reduces, speed increase, in "eight" shape arrangement
Rectangular fin 31 serves good shunting action, while backflow phenomenon occurs at rectangular fin rear, forms two almost
What symmetrically, flow direction was opposite flows to whirlpool (referring to Fig. 4), and little particle, can be rich around rectangular fin because the small diffusivity of quality is strong
Collection, particles collision frequency accordingly increase, and are advantageous to particle agglomeration；The rectangular fin arranged in "eight" shape can reunite turbulent flow
The exhaust gases passes approximation of room is divided into contraction and enlargement nozzle shape, and the fluid after shunting is because speed is different, in the presence of velocity gradient,
Promote fluid mixing, collision, further increase the agglomerating effect of fine particle.
Fig. 5 is front and rear particle diameter distribution comparison diagram of reuniting through the present embodiment device, fine grained in starting stage incoming flue gas
Particle diameter is in 0.021 μm -6.256 μm, wherein about 96% fine particle is in 0.021 μm of -0.2 μ m, (such as Fig. 5 can
Know), in the present apparatus after overbunching, collision and reuniting, changed in smoke outlet flue gas particle diameter, particle diameter enters one
Step increases, and the particle diameter at number density percent maximum reaches 2.4 μm or so, and grain diameter is close in 2 μm -6 μm or so of number
Degree concentration reaches 80% or so, thus illustrates that apparatus of the present invention have good agglomerating effect to fine particle, effectively demonstrate,proves
Bright coal-fired fine particle is after apparatus of the present invention and method processing, particle agglomeration positive effect.
The present invention does not address part and is applied to prior art.
Claims (4)
1. a kind of promote the device that fine particle interacts in fire coal boiler fume, it is characterised in that the device leads to including rectangle
Road, scaling aditus laryngis, turbulent flow reunion room and exhanst gas outlet, the rectangular channel are smoke inlet, and the scaling aditus laryngis includes tapered
Part and flaring part, tapered portion are connected with rectangular channel, and flaring part is connected with turbulent flow reunion room one end, turbulent flow reunion room
The other end be provided with exhanst gas outlet, exhanst gas outlet is connected with follow-up cleaner；The turbulent flow reunion interior is provided with some numbers
The rectangular fin of amount, each two rectangular fin are one group, share n groups, and n >=2, every group of two rectangular fins are in " eight " word
Shape, towards flue gas direction of flow, n groups rectangular fin is sequentially arranged in turbulent flow along flue gas direction of flow and reunited at "eight" shape osculum end
It is indoor；The rectangular fin and the angle that flue gas direction of flow is in 20~60 °, length and contracting of the turbulent flow reunion room in width
The ratio for putting diameter at the aditus laryngis of aditus laryngis is 6:5；
Using said apparatus promote fire coal boiler fume in fine particle interact method be：By dry method, semidry method or
The high-temperature flue gas of wet method fume desulfurizing system, into rectangular channel in carry out fully screening mixing；Then, flue gas enters scaling larynx
Mouthful, produce jet effect；Subsequently into turbulent flow reunion room, by one group of rectangular fin being arranged symmetrically in "eight" shape, due to
The flow-disturbing effect of rectangular fin, flow field produce velocity gradient, and then a pair of symmetrical and speed are produced at rectangular fin rear
Spend opposite vortex, particle occurs mutually collision and reunited, and increases fine grained granularity, when particle increase to a certain extent, used
Property in the presence of flow to and export with main flume, non-aggregated fine grained passes through second group of rectangular fin, the group of further hitting against
It is poly-；Little particle is reunited with whirlpool, and bulky grain flows out with inertia, is moved in circles, and is finally removed through exhanst gas outlet by deduster.
2. according to claim 1 promote the device that fine particle interacts in fire coal boiler fume, it is characterised in that
The rectangular fin is 4 in the length of length direction and width ratio:1~6:1.
3. according to claim 1 promote the device that fine particle interacts in fire coal boiler fume, it is characterised in that
The turbulent flow reunion room length direction is 2.5~3.5 with the length ratio on width:1；Rectangular channel in length direction and
Ratio on width is 0.5-0.9, and it is 10 to scale the ratio between diameter and rectangular channel width at the aditus laryngis of aditus laryngis：19.
4. according to claim 1 promote the device that fine particle interacts in fire coal boiler fume, it is characterised in that
The quantity of the rectangular fin is 4-6, common 2-3 groups.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610278398.4A CN105749690B (en) | 2016-04-28 | 2016-04-28 | Promote the device and method that fine particle interacts in fire coal boiler fume |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610278398.4A CN105749690B (en) | 2016-04-28 | 2016-04-28 | Promote the device and method that fine particle interacts in fire coal boiler fume |
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| JP6660564B2 (en) * | 2016-11-11 | 2020-03-11 | トヨタ自動車株式会社 | Air blow type cleaning device |
| CN106966173B (en) * | 2017-06-02 | 2019-03-19 | 江苏理工学院 | A kind of autoexcitation air particles conveying device |
| CN108195069A (en) * | 2017-12-19 | 2018-06-22 | 苏娜娜 | A kind of efficient hot water boiler for improving fuel availability |
| CN107930332B (en) * | 2017-12-25 | 2023-02-07 | 河北工业大学 | Device and method for strengthening removal of ultrafine particles in coal-fired boiler |
| CN108325356B (en) * | 2018-03-15 | 2021-05-11 | 东南大学 | Device and method for cooperatively removing fine particulate matters and sulfur trioxide from high-sulfur coal |
| TWI734497B (en) * | 2019-10-08 | 2021-07-21 | 盟立自動化股份有限公司 | Industrial apparatus and cyclone exhaust device |
| CN112316570B (en) * | 2020-10-15 | 2022-05-20 | 中国石油大学(华东) | Compact type industrial tail gas fine particle efficient removal and cooling device and method |
| CN112984500B (en) * | 2021-01-27 | 2022-12-06 | 杭州聚能环保科技股份有限公司 | Horizontal single-furnace-liner pulverized coal fired boiler |
| CN114797290B (en) * | 2022-04-06 | 2024-01-23 | 常州大学 | Step array longitudinal vortex dust fog coalescence system |
| CN116510419B (en) * | 2022-12-01 | 2023-09-22 | 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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| CN201643931U (en) * | 2010-05-07 | 2010-11-24 | 牛世洲 | Fine particulate coalescence device |
| CN104801420B (en) * | 2015-05-13 | 2017-05-10 | 东南大学 | Device and method for increasing grain size of PM2.5 (particulate matter2.5) through turbulent flow and chemical agglomeration coupling |
| CN104998504B (en) * | 2015-07-22 | 2017-06-30 | 江苏新中金环保科技股份有限公司 | A kind of wet desulphurization tower desulfurization and dedusting demisting water saving art |
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