CN205598871U - Fine particles interact's device in promotion coal fired boiler flue gas - Google Patents

Abstract

The utility model relates to a fine particles interact's device in promotion coal fired boiler flue gas, its characterized in that the device includes rectangular channel, the aditus laryngis of zooming, torrent reunion room and exhanst gas outlet, rectangular channel is the flue gas entry, the aditus laryngis of zooming includes convergent subtotal flaring part, and the convergent part is connected with rectangular channel, and the flaring partially is connected with torrent reunion room one end, and the other end of torrent reunion room is equipped with the exhanst gas outlet, and the exhanst gas outlet is connected with subsequent dust collecting equipment, the indoor rectangle fin that is equipped with a plurality of quantity of torrent reunion, per two rectangle fins are a set of, total n group, and n >= 2, two rectangle fins of every group are " eight " font, and " eight " font osculum end is followed flue gas incoming flow direction and is arranged in the torrent reunion indoorly in proper order towards flue gas incoming flow direction, n group rectangle fin, is the rectangle fin 20~60 with flue gas incoming flow direction the contained angle, torrent reunion room is 6 in the proportion of width direction's length and the aditus laryngis department diameter of the aditus laryngis of zooming: 5.

Description

Promote the device that in fire coal boiler fume, fine particle interacts

Technical field

This utility model relates to the removing sulfuldioxide of fine particle in coal-fired flue-gas, is specifically related to promote fine grained in fire coal boiler fume The device that thing interacts.

Background technology

Pellet (PM₁₀) refer to that aerodynamic diameter is less than or equal to the fine particle of 10 μm, wherein wrap The PM contained_2.5Have resulted in serious atmospheric environment problem, cause the great attention of China.PM_2.5Harm be, grain Footpath is little, and specific surface area is big, the harmful substance such as easy viral adsorption, antibacterial, can form deposition in alveolar, draw after entering human body Send out respiratory system disease and heart and lung diseases, very big to harm；Meanwhile, fine particle holdup time length, transmission in an atmosphere Distance is 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, Atmospheric environment be also result in strong influence.

Related data shows, PM in China's air_2.5The principal element that concentration increases is substantial amounts of soot emissions, and soot emissions 70% come from coal burning, coal-fired power plant is again the main place of coal consumption.Coal-fired process produces substantial amounts of dust, Existing cleaner mainly uses electrostatic precipitator, sack cleaner and Wetting electrostatic cleaner etc., bigger to removing particle diameter Particulate efficiency is higher, and quality removal efficiency can reach more than 99%；But the fine particle less to particle diameter, existing cleaner Relatively low to its capture rate, if in quantitative terms, still there is the fine grained of account for dust total quantity more than 90% not to be removed and enter environment Air, although shared by it, mass fraction is less, but enormous amount, be more easy to be absorbed by the body, cause high risks.Dry method, half Dry method and wet process of FGD are also only capable of suppressing coarse grained discharge, to PM_2.5Deng fine grained trapping difficulty, and through overly moist After method flue gas desulphurization system, the most also can produce new fine particle, further increase PM_2.5Discharge.Mesh Before, physics and chemical method are mainly used in the research that Combustion Source fine particle controls technology both at home and abroad, promote fine particle group Poly-length greatly larger particles, relends and helps tradition cleaner to be processed to, can be effectively improved the removal effect to fine particle.

Present stage main agglomeration techniques includes acoustic agglomeration technology, magnetic coagulation technology, steam phase transforming agglomeration techniques, coagulation skill Art, chemical agglomeration technology and turbulent flow agglomeration techniques etc., but all there is problem in various degree: acoustic agglomeration energy consumption is too high, and Produce bigger noise；Magnetic coagulation technology and steam phase transforming agglomeration techniques are required to fine particle and possess corresponding physical characteristic； Electricity coagulating technique depends primarily on the factors such as particle concentration, particle diameter, CHARGE DISTRIBUTION and electric field intensity, and agglomerating effect is preferable, so And, due to microcosmic and the complexity of fine particle, at present still in the experimentation stage, commercial Application is few；Chemical agglomeration Technology needs to configure the agglomeration promotor of specific acidity, concentration, due to harmful after the preparation of chemical reagent and absorption fine particle The process aspect of element is the most difficult；Comparatively speaking, turbulent flow agglomeration techniques utilizes the turbulent structure produced in flow of flue gas, different The particulate matter of particle diameter is assembled in the zones of different of whirlpool, and the bigger granule of particle diameter in the flowing of whirlpool border or is thrown out of whirlpool due to inertia Whirlpool, the particulate matter that particle diameter is the least is the most easily inhaled in whirlpool center by volume, forms bigger concentration accumulation regions, this adds increased different grain The probability collided between the particulate matter of footpath and interact.

Li Yunfei (Li Yunfei. the research [D] that flue gas fine particle turbulent flow is reunited. Harbin Institute of Technology .2014) propose one newly The turbulence coagulation device of type.This turbulence coagulation device is to arrange turbulator member in rectangular channel, it is contemplated that flow-disturbing cylinder can produce big chi The whirlpool of degree, votex sheet can produce the whirlpool of little yardstick, therefore install two flow-disturbing cylinders arranged side by side at rectangular flue, to produce large scale Whirlpool, after cylinder install 4 × 6 " ten " font votex sheet, to produce little whirlpool.Its weak point is " ten " font part Use makes flue resistance increase, and is unfavorable for flow of flue gas, will reduce this defect and equipment volume can be made again to increase, and cost increases.

The patent of invention of Application No. 201010504951.4 discloses a kind of device and method promoting particulate matter to interact, should Fluid partitioning is become different runner by diversion column by method in the future stream flue gas, enters the product whirlpool votex sheet equipped with many convex or concaves Reunion chamber in, promote that fine particle collides reunion by votex sheet detour flow, it is said and can reach good agglomerating effect. Although waveform votex sheet can reduce flow passage resistance force of waterproof, but fluid velocity graded is less, and product whirlpool effect is poor, causes agglomerating effect Depend on votex sheet quantity；Votex sheet requirement on machining accuracy is high simultaneously, adds the input cost of equipment.

Utility model content

For the deficiencies in the prior art, the technical problem that this utility model intends to solve is to provide a kind of promotion in fire coal boiler fume The device and method that fine particle interacts.The deficiency that this device exists in view of turbulent flow reunion, by installing vortex generator additional On the basis of (the present embodiment i.e. rectangular fin) ensures turbulence effects, avoid the flow resistance that turbulent flow votex sheet causes as far as possible, adopt Inducing whirlpool technology with injection stream and vortex generator, have equipment simple, delicate structure, product whirlpool is effective, removing The feature that efficiency is high.

The removing of fine particle in the method high-temperature flue gas after processing through dry method, semidry method and wet process of FGD, The rational deployment utilizing device each several part installs vortex generator additional simultaneously, makes to flow flue gas and mixes in rectangular channel, at scaling larynx Accelerating at the aditus laryngis of mouth, under the effect of vortex generator, the flue gas through accelerating can produce bigger velocity gradient, promotes whirlpool The generation in whirlpool, induction fine particle Local enrichment, and then add the probability of particles collision, reach fine particle and reunite for bigger The effect of granule.

This utility model solves described technical problem and adopts the technical scheme that:

A kind of device promoting fine particle in fire coal boiler fume to interact, it is characterised in that this device include rectangular channel, Scaling aditus laryngis, turbulent flow reunion room and exhanst gas outlet, described rectangular channel is smoke inlet, and described scaling aditus laryngis includes tapered portion With flaring part, tapered portion is connected with rectangular channel, and flaring part is connected with one end, turbulent flow reunion room, turbulent flow reunion room another One end is provided with exhanst gas outlet, and exhanst gas outlet is connected with follow-up cleaner；Described turbulent flow reunion indoor are provided with a number of square Shape fin, each two rectangular fin is one group, total n group, and n >=2, and two rectangular fins often organized are "eight" shape, "eight" shape osculum end carrys out flow path direction towards flue gas, and n group rectangular fin carrys out flow path direction along flue gas and is sequentially arranged in turbulent flow reunion room In；It is the angle of 20～60 ° that described rectangular fin and flue gas carry out flow path direction, and turbulent flow reunion room is at the length of width and scaling At the aditus laryngis of aditus laryngis, the ratio of diameter is 6:5.

A kind of method promoting that in fire coal boiler fume, fine particle interacts, the method uses said apparatus, comprises the concrete steps that: Through the high-temperature flue gas of dry method, semidry method or wet method fume desulfurizing system, in entering rectangular channel, fully screen mixing；With After, flue gas enters scaling aditus laryngis, produces jet effect；Subsequently into turbulent flow reunion room, symmetrical in "eight" shape through one group The rectangular fin arranged, due to the flow-disturbing effect of rectangular fin, flow field produces velocity gradient, and then produces at rectangular fin rear A pair symmetrical and that speed is contrary eddy current, granule occurs mutually to collide reunion, makes fine grained granularity increase, when granule increases Big under the effect of inertia, flow to outlet with main flume the most to a certain extent, non-aggregated fine grained through second group of rectangular fin, Further hit against reunion；Little granule is reunited with whirlpool, and bulky grain flows out with inertia, moves in circles, finally through exhanst gas outlet by removing Dirt device removes.

Compared with prior art, the beneficial effects of the utility model are:

1, this utility model device utilizes the vortex at rectangular channel interior (before scaling aditus laryngis) up-and-down boundary, makes entrance rectangle lead to The flue gas that flows in road produces relatively Maelstrom, the granule of different-grain diameter in flue gas not only can be made to be sufficiently mixed, and make whirlpool center Part fine particle is formed reunites.

2, the scaling aditus laryngis in this utility model device uses scaling shape spout structure design, makes to flow cigarette through well-mixed Gas is decrease temperature and pressure speedup at aditus laryngis, reaches jet effect, promotes to occur between the steam in flue gas and granule heterogeneous nucleating, Change the character of particle surface, make dust granules be changed into hydrophilic particles, improve be attached to each other between particle, coalescence general Rate；

3, this utility model turbulent flow reunion indoor install rectangular fin additional, can produce on flow direction at rectangular fin rear vertical Raw a pair almost symmetrical but flow to contrary whirlpool, i.e. flow to whirlpool.The granule that particle diameter is less is flowing to product near whirlpool with flow direction Raw localized clusters, collide and reunite, flowing to the existence in whirlpool and extend the particulate matter time of staying in this region, and bulky grain by Breaking away from vortices entrain in effect of inertia, flow out with the flue gas of flow direction, little granule continues to rotate, it is possible to realize the choosing to granule Select and coalescence, thus ensure that the removal effect of granule.

4, this utility model rectangular channel, scaling aditus laryngis, turbulent flow reunion room, integral layout is reasonable, and contact front and back is closely；Come Stream flue gas is through early stage screening mixing, and jet accelerates, and strengthens disturbance, improves agglomerating effect；Meanwhile, apparatus structure is simple, Easy to operate, no-movable part, it is arranged in industrial processes before cleaner, is combined with high-effective dust-removing equipment, it is not necessary to Change the dedusting structure of coal-burning power plant, there is good future in engineering applications.

This utility model is arranged organizes rectangular fin more, beneficially the enhancing of agglomerating effect, overcomes to a certain extent and produces whirlpool difference Defect；Utilizing the combination of scaling aditus laryngis and the rectangular fin of "eight" shape distribution, fine particle first passes around scaling aditus laryngis, produces Raw blood pressure lowering cooling accelerating function, promotes to occur between the steam in flue gas and granule heterogeneous nucleating, changes the property of particle surface Matter, makes dust granules be changed into hydrophilic particles, the rectangular fin that the particulate matter after accelerating subsequently is distributed through "eight" shape Shunting action, produces bigger velocity gradient, reinforcement product whirlpool effect, and then improves the probability of particulate matter Local enrichment, collision, Reach good agglomerating effect, overcome simple dependence inlet velocity in prior art and, through votex sheet, reduce velocity gradient and cause The defect producing whirlpool weak effect.

Accompanying drawing explanation

Fig. 1 is that this utility model promotes the stereochemical structure of a kind of embodiment of device that fine particle interacts in fire coal boiler fume Schematic diagram；

Fig. 2 is that this utility model promotes the plan structure of a kind of embodiment of device that fine particle interacts in fire coal boiler fume Schematic diagram；

Fig. 3 is the endocorpuscular speed vector figure of device that this utility model promotes that in fire coal boiler fume, fine particle interacts；

Fig. 4 is that this utility model promotes the rectangular fin of a kind of embodiment of device that fine particle interacts in fire coal boiler fume Neighbouring particle speed vector partial enlarged drawing；

Fig. 5 is that this utility model promotes the coal-burning boiler of a kind of embodiment of device that fine particle interacts in fire coal boiler fume Particle diameter profiles versus before and after the removing means of flue gas fine particle is reunited schemes.

In Fig. 1: 1-rectangular channel；2-scales aditus laryngis；3-turbulent flow reunion room；31-rectangular fin；4-exhanst gas outlet.

Detailed description of the invention

Below in conjunction with embodiment and accompanying drawing, this utility model is described in detail, but does not want in this, as to the application right Ask the restriction of protection domain.

This utility model promotes device (being called for short device, the see Fig. 1-2) bag that in fire coal boiler fume, fine particle interacts Including rectangular channel 1, scaling aditus laryngis 2, turbulent flow reunion room 3 and exhanst gas outlet 4, described rectangular channel 1 is smoke inlet, described Scaling aditus laryngis 2 includes tapered portion and flaring part, and tapered portion is connected with rectangular channel 1, flaring part and turbulent flow reunion room 3 one end connect, and the other end of turbulent flow reunion room 3 is provided with exhanst gas outlet 4, and exhanst gas outlet 4 is connected with follow-up cleaner； Being provided with a number of rectangular fin 31 in described turbulent flow reunion room 3, each two rectangular fin is one group, total n group, and N >=2, two rectangular fins 31 often organized are in "eight" shape, and "eight" shape osculum end comes flow path direction, n group rectangle towards flue gas Fin carrys out flow path direction along flue gas and is sequentially arranged in turbulent flow reunion room 3；It is 20～60 that described rectangular fin 31 carrys out flow path direction with flue gas ° angle, turbulent flow reunion room 3 ratio of diameter at length and the aditus laryngis of scaling aditus laryngis of width is 6:5.

The rectangular fin 31 length at length direction and width that is further characterized by of the present utility model is than for 4:1～6:1. During actual industrial production, the operating load of boiler is not less than 60%, and different load gets off to flow the speed of flue gas, granule Quantity all can change, according to the topology layout of the turbulent flow reunion room 3 of this utility model device, when flow velocity is less, permissible Suitably reduce the length-width ratio of rectangular fin, when flow velocity is bigger, can suitably increase the length-width ratio of rectangular fin.Consider cigarette Gas velocity and this utility model device produce whirlpool effect, rectangular fin 31 at the length ratio of length direction and width for 4:1～6:1 Shi Xiaoguo is preferable, especially rectangular fin at the length ratio of length direction and width during for 5:1, best results.In turbulent flow Reuniting indoor, rectangular fin compared conference in the length of length direction and width and causes rectangular fin width less, and fluid is sent out Raw flow-disturbing is unfavorable for the generation of whirlpool；Too small, i.e. width is excessive, can block runner, increases flow resistance.

Described turbulent flow reunion room 3 length direction that is further characterized by of the present utility model with the length ratio on width is 2.5～3.5:1；Rectangular channel 1 ratio in length and width directions is 0.5-0.9, on scaling aditus laryngis 2 width The dimensional parameters of dimension reference rectangular channel, and at aditus laryngis (i.e. scaling aditus laryngis 2 width minimum at) diameter and rectangular channel width it Ratio is 10:19.

The quantity being further characterized by described rectangular fin of the present utility model is 4-6,2-3 group altogether.

This utility model promotes the method that in fire coal boiler fume, fine particle interacts, and the method uses said apparatus, specifically Step is: through the high-temperature flue gas of dry method, semidry method or wet method fume desulfurizing system, fully sieves in entering rectangular channel 1 Choosing mixing；Subsequently, flue gas enters scaling aditus laryngis 2, produces jet effect；Subsequently into turbulent flow reunion room 3, through one group in The rectangular fin that "eight" shape is arranged symmetrically with, due to the flow-disturbing effect of rectangular fin, flow field produces velocity gradient, and then at square Shape fin rear produces a pair symmetrical and that speed is contrary eddy current, and granule occurs mutually to collide reunion, makes fine grained granularity Increasing, when granule increases to a certain degree, flow to outlet with main flume under the effect of inertia, non-aggregated fine grained passes through Second group of rectangular fin, further hits against reunion；Little granule is reunited with whirlpool, and bulky grain flows out with inertia, moves in circles, Remove by cleaner unit through exhanst gas outlet 4 eventually.

In this utility model, rectangular channel 1 flows the particulate matter of various particle diameters in flue gas for screening, flows flue gas due to temperature relatively Height, may result in little granule buoyancy lift relatively big, in order to avoid this probability, and owing to little granule followability is preferable, so Utilize the vortex at rectangular channel 1 up-and-down boundary, make enrichment, collision that little granule produces, certain reunion, certain journey occur The particle diameter difference making entrance scaling aditus laryngis 2 on degree is less, and particle size distribution is the most uniform；Scaling aditus laryngis 2 can make to flow cigarette The existing jet of QI excess；Turbulent flow reunion room 3 installs rectangular fin 31 additional, for producing vortex in flow field, increases holdup, Strengthening fine particle agglomerating effect, rectangular fin 31 is also called vortex generator.Rectangular channel, scaling aditus laryngis, turbulent flow are reunited Room by being closely joined together successively, constitutes package unit, and before being connected to dust arrester entrance by securing member.

This utility model based on the insight that flow has different quality, the fine particle of different aerodynamic size in flue gas, The particulate matter of different-grain diameter is different to the turbulent structure followability of different scale, i.e. has in convection cell and determines that the turbulence vortex of size has Different movement effects, the degree that fine particle is involved in by turbulence vortex is different.Therefore, fine particle after turbulence vortex, Movement locus will change, the fine particle collision adding different-grain diameter and the probability reunited.

The group spacing often organizing rectangular fin in this utility model needs the position meeting the installation of rear set rectangular fin to destroy Above the whirlpool that flows to of one group of rectangular fin generation is foundation.But group number and group spacing are unsuitable excessive.Group number more can produce more Vortex street also makes the particulate matter time of staying increase, owing to vortex generator is arranged in turbulent flow reunion room 3, so vortex generator group The size of spacing also directly affects the size of reunion room, but installs and too much can increase flue resistance, and spacing is excessive, and can increase need not Want size, increase equipment cost.According to actual requirement, considering and determine rectangular fin group number, initial group spacing is not less than 100mm, different according to installation group number thereafter, organize spacing with flow velocity according to distribution of successively decreasing successively.

This utility model promotes that in fire coal boiler fume, the device of fine particle interaction is to fine particle in coal-fired plant flue gas Removing principle and process as follows: through the high-temperature flue gas of dry method, semidry method or wet method fume desulfurizing system, with certain flow velocity Fully screening mixing in entering rectangular channel 1, make the fine particle mix homogeneously of each particle diameter, subsequently, flue gas enters contracting Putting aditus laryngis 2, pressure reduces, and speed increases, and produces jet effect, thereafter through one group of square being arranged symmetrically with in "eight" shape Shape fin 31, due to the flow-disturbing effect of rectangular fin, flow field produces velocity gradient, and then produces a pair phase at rectangular fin rear Mutually symmetrical and that speed is contrary eddy current, i.e. produces high turbulence, impingement region that fine particle concentration is higher, owing to fine grained has There is good followability, therefore the existence of eddy current add the time of staying of granule and forms high concentration region, occur mutually to collide reunion, Make fine grained granularity increase, when granule increases to a certain degree, under the effect of inertia, flow to outlet with main flume, non-aggregated Fine grained through second group of rectangular fin, further hit against reunion.Little granule 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 cleaner unit Remove.

The improvement of this utility model method is, flowing flue gas process can shape when the entrance of rectangular channel is with rectangular channel 1 Becoming convex and expand flowing, the particulate matter flowed in flue gas can be carried out just screening by the whirlpool of generation, makes the particulate matter that particle diameter is less reunite, And then making the particle size of entrance scaling aditus laryngis 2 differ less, particle size distribution is the most uniform；Subsequently, different-grain diameter Particulate matter decrease temperature and pressure speedup at scaling aditus laryngis 2, there is heterogeneous core to a certain extent in the aqueous vapor in fine particle and flue gas Changing, make granule be converted into hydroaropic substance, the beneficially collision between granule is reunited；Meanwhile, the granule through accelerating can be Produce bigger velocity gradient after votex sheet, promote the generation of vortex, strengthen the Local enrichment of granule, improve collision, agglomerating effect.

Embodiment 1

The present embodiment promote the device 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, described rectangular channel 1 is smoke inlet, described scaling aditus laryngis 2 include tapered portion and Flaring part, tapered portion is connected with rectangular channel 1, and flaring part is connected with one end, 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；If being provided with in described turbulent flow reunion room 3 The rectangular fin 31 of dry quantity, each two rectangular fin is one group, total n group, and n >=2, two rectangular fins 31 often organized In "eight" shape, "eight" shape osculum end carrys out flow path direction towards flue gas, and n group rectangular fin carrys out flow path direction along flue gas and is sequentially arranged In turbulent flow reunion room 3；It is the angle of 30 ° that described rectangular fin 31 carrys out flow path direction with flue gas, and two rectangular fins constitute " eight " Font is installed on turbulent flow and reunites indoor, and turbulent flow reunion room 3 is the ratio of diameter at the length of width and the aditus laryngis of scaling aditus laryngis For 6:5.

In turbulent flow reunion room 3 described in the present embodiment, the quantity of rectangular fin 31 is 4, totally 2 groups, i.e. n=2, described rectangular-wing Sheet 31 is made than the rectangle wearing plate for 5:1 in the length of length direction and width；Initial group spacing is 110mm.

The size of rectangular channel 1 is 100mm × 190mm × 209mm；A diameter of 100mm at the aditus laryngis of scaling aditus laryngis 2, long High respectively 150mm, 209mm, the size of turbulent flow reunion room 3 is 350mm × 120mm × 209mm, in turbulent flow reunion room Offer the rectangular opening of a size of 55mm × 15mm, wherein, square according to the arrangement of rectangular fin 31 on upper and lower two surfaces The length, width and height of shape fin 31 are respectively 209mm × 50mm × 10mm, and two rectangular fins are arranged symmetrically with, and form "eight" shape Structure, constitutes one group.

It is that the flue before certain plant dust catcher obtains that the present embodiment flows flue gas.The granule in flue gas is measured by the low ram of electrostatic Scope, particle size distribution is between 0.021 μm-6.256 μm, and wherein the granule of 96% is between 0.021 μm-0.2 μm. Cigarette temperature can reach 150 DEG C, flows flue gas and enters rectangular channel with the speed of 13m/s, and the particle of different-grain diameter yardstick is the most mixed Closing, enter scaling aditus laryngis 2 and produce jet effect, speed increases to 21m/s, and the flue gas after blood pressure lowering is accelerated enters turbulent flow reunion room 3, under the effect of rectangular fin 31, produce vortex street and assemble, producing vortex street can increase collision frequency, significantly strengthens reuniting Effect.

Fig. 3 is the speed vector figure of granule in the present embodiment device, from figure 3, it can be seen that flow flue gas to flow into rectangular channel 1 In, due to the impact of fluidic architecture, flowing flue gas pressure at aditus laryngis and reduce, speed increases, the square arranged in "eight" shape Shape fin 31 serves good shunting action, backflow phenomenon occurs at rectangular fin rear simultaneously, define two the most right Claiming, flow to contrary flow to whirlpool (seeing Fig. 4), little granule is strong due to the little diffusivity of quality, can be enriched with around rectangular fin, Particles collision frequency increases accordingly, beneficially particle agglomeration；Turbulent flow can be reunited room by the rectangular fin arranged in "eight" shape Exhaust gases passes approximation be divided into contraction and enlargement nozzle shape, the fluid after shunting is different due to speed, under the effect of velocity gradient, promotees Make fluid mixing, collision, further increase the agglomerating effect of fine particle.

Fig. 5 is the particle diameter profiles versus figure before and after the present embodiment device is reunited, and the starting stage flows in flue gas at fine grained particle diameter In 0.021 μm-6.256 μm, the fine particle of the most about 96% is in 0.021 μm-0.2 μ m (as shown in Figure 5), In this device through overbunching, collide and reunite after, there occurs that change, particle diameter increase further at smoke outlet flue gas particle diameter Greatly, the particle diameter at number density percent maximum reaches about 2.4 μm, and the number density that grain diameter is about 2 μm-6 μm Concentration all reaches about 80%, and thus explanation this utility model device has good agglomerating effect to fine particle, effectively demonstrate,proves Bright coal-fired fine particle is after this utility model device and method processes, and particle agglomeration effect is obvious.

This utility model is not addressed part and is applicable to prior art.

Claims (4)

1. the device promoting that in fire coal boiler fume, fine particle interacts, it is characterized in that this device includes rectangular channel, scaling aditus laryngis, turbulent flow reunion room and exhanst gas outlet, described rectangular channel is smoke inlet, described scaling aditus laryngis includes tapered portion and flaring part, tapered portion is connected with rectangular channel, flaring part is connected with one end, turbulent flow reunion room, 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；Described turbulent flow reunion indoor are provided with a number of rectangular fin, each two rectangular fin is one group, total n group, and n >=2, two rectangular fins often organized are "eight" shape, "eight" shape osculum end carrys out flow path direction towards flue gas, and n group rectangular fin carrys out flow path direction along flue gas and is sequentially arranged in turbulent flow reunion indoor；It is the angle of 20～60 ° that described rectangular fin and flue gas carry out flow path direction, and turbulent flow reunion room ratio of diameter at the length of width and the aditus laryngis of scaling aditus laryngis is 6:5.

The device that in promotion fire coal boiler fume the most according to claim 1, fine particle interacts, it is characterised in that described rectangular fin at the length ratio of length direction and width for 4:1～6:1.

The device that in promotion fire coal boiler fume the most according to claim 1, fine particle interacts, it is characterised in that described turbulent flow reunion room length direction is 2.5～3.5:1 with the length ratio on width；Rectangular channel ratio in length and width directions is 0.5-0.9, and at the aditus laryngis of scaling aditus laryngis, diameter is 10:19 with the ratio of rectangular channel width.

The device that in promotion fire coal boiler fume the most according to claim 1, fine particle interacts, it is characterised in that the quantity of described rectangular fin is 4-6, altogether 2-3 group.