Cloud formula dust pelletizing system
The present invention relates to a kind of dust pelletizing system is and in particular to a kind of utilize cloud principle to dust catching especially to fine grained
Thing（PM2.5）The cloud formula dust pelletizing system of trapping.
Atmospheric pollution is one of key factor of impact China environment, and wherein dust pollution is the important portion of atmospheric pollution
Point.Research shows, the fine particle in dust（PM2.5）It is easy to heavy metal in enriched air, acidic oxide, organic contamination
Thing, antibacterial and virus etc., it is far above coarseparticulate to the harm of health.Therefore, control dust pollution, especially control
The discharge of fine particle is significant.（Magnify year, the research of Inhalable Particulates in Urban Ambient Air, [J] Shanghai environment section
Industrial at present conventional dust pelletizing system has cyclone dust extractor, electrostatic precipitator, sack cleaner, wet scrubber
Deng.Wherein wet scrubber with its structure simple, equipment investment is low, efficiency of dust collection is high and in its water add alkaline matter
Have afterwards absorbing sulfur dioxide in flue ability the features such as, be widely used in the coal-burning boiler system of big and medium-sized cities.
（Zhang Dianyin, Wang Chun. dedusting handbook [M]. Chemical Industry Press, 2004.）
Wet scrubber is to make dusty gas and liquid（Generally water）It is fully contacted, using inertial collision, interception and expansion
Particulate matter is separated from dusty gas by the effect such as scattered.In engineering, wet scrubber is divided into mental retardation and high energy two class.Low
The pressure loss of energy wet scrubber is 0.2-1.5kPa, but it is very low to 10 μm of particles below purification efficiencies；High energy is wet
The purification efficiency of formula cleaner unit is up to 99%, but its pressure loss is 2.5-9.0kPa.（Jiang Zhanpeng, Yang Hongwei. Environmental Engineering
[M]. Higher Education Publishing House, 2013.）
However, the wet scrubber being used at present gradually exposes some in actual motion has asking of universality
Topic：1. the flue gas with water discharged is serious, and this not only results in draught fan impeller and glues ash, produces abnormal vibrations, and can be seriously rotten
Erosion fan blade and back-end ductwork；2. the flue-gas temperature fall discharged is excessive, and this can make chimney discharge the lifting of flue gas
Height reduction, and then have influence on pollutant dilution diffusion in an atmosphere in flue gas, the local of chimney near zone can be caused empty
Gas pollutes.（Dong, Li Jun etc. wet scrubber is in operation problems analysis, [J] electric power station system engineering, and 2006,22
Water is dispersed into tiny drop by the method that traditional wet process of cleaning relies primarily on mechanical spraying, used by drop
Property collision and diffusion precipitin carry out catching dirt.Typically spray to fine particle dust（PM2.5）Collecting effect not good, mainly because
Too big for the particle diameter of water smoke（200～600 μm of particle diameter）.（Chen Zhuokai, Chen Fanzhi, etc. Atomization Water Made by Ultrasonic Technique is in Dust Removal Experiment
Application [J]. Guangdong chemical industry, 2006,33（10）：74-77）
Through retrieval, Chinese patent application 200810091426.7 discloses a kind of high-efficiency wet-type dust collector, not only increases
Collection efficiency to PM2.5, also efficiently solves the problems, such as equipment corrosion, but does not still solve traditional wet cleaner unit water consumption
Amount is big, high energy consumption, the shortcomings of blowdown easily blocks, maintenance cost is high.
Content of the invention
The present invention provides a kind of cloud formula dust pelletizing system, has good separation under the high operating mode containing Dust Capacity to fine particle
For this reason, the present invention adopts the following technical scheme that：
A kind of cloud formula dust pelletizing system, this dust pelletizing system includes producing the device of relative humidity supersaturation water smoke, and this device is given birth to
The supersaturation water steam becoming is sufficiently mixed with fine particle in the flow field of disturbance, and saturated vapor is with fine particle for condensing
Karyolymph is simultaneously attached to fine particle surface, so that fine particle particle diameter is constantly increased, to improve the hydrophilicity of fine particle, and
And the volume of increase fine particle and weight, and then facilitation is played in the trapping to fine particle；Meanwhile, supersaturation water
Drop in mist and fine particle mutually collide, and merge, reunion microphysical processes, to promote to fine particle further
Trapping；And discharge substantial amounts of anion during being somebody's turn to do and produce electrostatic reaction with fine particle, be conducive to the heavy of fine particle
This system foremost be charging aperture, this charging aperture successively with mist generator or atomization box, granular grows area or swollen
Swollen section, cloud formula collecting region or cloud formula dust arrester, air-introduced machine, the sealing connection of exit concentration measurement region；Granular grows area or expansion
Section bottom connection dirt discharge groove；Cloud formula collecting region or cloud formula dust arrester bottom connection ash exhauster and granular grows area or expansion joint
Outlet tangentially connect cloud formula collecting region or cloud formula dust arrester.
Described mist generator or atomization box are supersonic atomizer or high-pressure nozzle atomising device or shower nozzle atomization dress
The described ash exhauster port of export adopts water-stop.
Described granular grows area or expansion joint are erect or accumbency placement.
Described mist generator or atomization box and granular grows area or expansion joint become one.
Dust-contained airflow stops more than 2s in described granular grows area or expansion joint.
Described cloud formula collecting region or cloud formula dust arrester are mainly by being coaxially disposed, have each other cavity, each other
The central cylinder of seal isolation, middle cylinder, outer cylinder body composition, the bottom of this three cylinder be cone structure and middle cylinder and
The cone distal end of outer cylinder body is inside and outside underflow opening, and this inside and outside underflow opening passes through flange and ash exhauster connects；Granular grows area
Or the outlet of expansion joint and the tangential entry insertion of cavity upper end between described middle cylinder and outer cylinder body；Several small cyclones
On the inwall that separator is uniformly fixed on middle cylinder with the center of three cylinders for axle；Middle cylinder and the combination of its underpart cone
Place is connected with base plate, leaves air inlet annular distance between the outer rim of this base plate and the inwall of middle cylinder；Several small cyclones described divide
Be fixed on base plate from the bottom discharge mouth of device and and middle cylinder bottom cone insertion；Several small cyclones described separate
The upper end of device has air inlet, the inner chamber insertion of this air inlet and middle cylinder；This several small cyclones separator upper end
Bend pipe and central cylinder insertion are passed through in outlet；Described bend pipe is placed in the top seal at outer cylinder body top, and this top cover has out
The angle of the section of described winding pipe exit and horizontal plane is 90oTo 180o.
The present invention, using " cloud " physicss, collision reunion principle, provides a kind of high and low cost of efficiency of dust collection, floor space
The fine particle collection device of few the features such as.The present invention is mainly suitable for the collection of fine particle PM2.5, can be used for commercial production
The trapping of middle dust, indoor and outdoor air purification etc., play the effect of dust suppression dedusting, reduce the danger to health for the fine particle
In the present invention, dust is reunited before entering collecting region and is grown up, and fluid drag is greatly reduced, is then removed by cleaner unit.Both
Take into account that cyclone dust removal structure is simple, reduced investment, take up an area small scale, energy consumption is low, easy and simple to handle, easy to maintenance, total efficiency of separation is high,
The advantage of stable performance, has the characteristics that efficiently to trap fine particle again.Experiment shows, the present invention to the clearance of dust up to
99.6%-99.9%, to fine particle（PM2.5）Trapping is also up to 95%.With different the dedusting technologies such as present invention, electrostatic precipitation
Device, sack cleaner, cyclone collection different-grain diameter fine particle dusts, utilize laser particle analyzer analysis different after collection
The classification efficiency of particle diameter dust, as shown in Figure 4.As can be seen that the present invention is above other to the collection efficiency of PM2.5 several removing
Compared with traditional wet process of cleaning, traditional wet process of cleaning is using drop as catching dirt body, for example with mechanical spray
Cleaning mixture is dispersed into tiny drop by the method for head, relies primarily on inertial collision, interception capture and the diffusion precipitin of drop
Form carries out catching dirt.Because the particle diameter of its water droplet is excessive, trap effect on driving birds is not good for fine particle, and what " cloud " technology produced
Size droplet diameter is little（It is generally less than 5 μm）, greatly, evaporation rate is high, and dust-containing area steam can be made to evaporate rapidly for specific surface area, forms satiety
And environment, then liquefied with dust granules for the nuclei of condensation, so that dust granules particle diameter is constantly increased, improve efficiency.Moreover, " cloud "
Technology, the water yield of use is few, not there is a problem of that in wet dust collection technology, by-product is difficult to collect and secondary pollution.
From present configuration analysis, how it reaches described effect below.
1. achieve two-stage in outer cylinder body with cyclone separator to separate, outer cylinder body is mutually isolated with cyclone separator close
Envelope, makes two-stage mutually not interfere with each other between separating, respectively the fine particle of different-grain diameter is removed, efficiency of dust collection carries significantly
2. solve a tolerance difficult problem pockety in small cyclones separator parallel process.Air-flow is through tangentially entering
Mouthful, produce eddy flow in outer cylinder body, finally even into some small cyclones separators, efficiently enter in small cyclones separator
Row fine particle is collected.
3. by Clausius-C1apeyron equationLearn, water saturation vapour pressure is with temperature
Rising and increase, when temperature is 10 DEG C, water saturation vapour pressure is 1200Pa.For cyclone separator, close
Outer wall is higher-pressure region, and center is negative pressuren zone.The pressure of the outer wall of cyclone separator is far above 1200Pa, and temperature is less than 10 DEG C,
Gas containing steam condenses rapidly in outer wall higher-pressure region.So, it is that high pressure condenses rapidly using cyclone separator near outer wall layer
The feature that area, central gas are forced down, dusty gas, in higher-pressure region rapid condensation, is conducive to separating.
4. small cyclones separator upper end outlet is bend pipe it can be ensured that static pressure suction, makes each small cyclones separator tolerance
5. dusty gas flows out from small cyclones separator upper end outlet, pours in central cylinder, in central cylinder, some
Stock dusty gas mutually collides, disturbance, so that granule continues to grow up, is conducive to the collection of granule, realizes the third level and separates.
6., before cloud formula collecting region or cloud formula dust arrester dedusting, atomizing humidifying performance process is carried out to dust-contained airflow, fully
Using " cloud " physics principle, efficient collection is carried out to fine particle.Using advanced electroacoustic transduction ultrasonic atomization or
Person's high-pressure nozzle spray technique, water consumption is very low, produces finely dispersed Micron-order high-density fine droplet, drop rapid vaporization
Produce local supersaturated vapor, so that supersaturated vapor is fully combined with fine particle, and particle growth area is provided, allow fine particle
Grow up, finally efficiently remove fine particle.
7. the cyclone separator of the present invention is connected in parallel using several small cyclones separators（Current cyclonic separation
Device many to be used alone, air quantity is uneven, efficiency is low）, each small cyclones separator intake and pressure distributing homogeneity are compared with mesh
Front cyclone separator has obtained greatly improving.
Fig. 1 is the schematic block diagram of the present invention；
Fig. 2 is the cutting structural representation of cloud formula collecting region of the present invention or cloud formula dust arrester；
Fig. 3 is the schematic top plan view of Fig. 2；
Fig. 4 is for the present invention and sack cleaner, electrostatic precipitator, cyclone dust extractor, wet scrubber in certain power plant's dedusting
Dust removing effects comparison diagram in test；
Fig. 5 is the present invention and the classification efficiency comparison diagram to different-grain diameter particle for the wet scrubber；
Fig. 6 is the present invention and Philips air purifier dust removing effects figure in different time；
Fig. 7 is the present invention and Philips air purifier removal VOCs design sketch in different time；
Fig. 8 is the present invention and the classification efficiency comparison diagram to different-grain diameter particle for the Philips air purifier.
Below in conjunction with the accompanying drawings the present invention and its effect are further illustrated.
Embodiment 1, with reference to Fig. 1, a kind of cloud formula dust pelletizing system, this device is charging aperture 1 foremost, and this charging aperture 1 is successively
With mist generator or atomization box 2, granular grows area or expansion joint 3, cloud formula collecting region or cloud formula dust arrester 5, air-introduced machine 7,
Exit concentration measurement region 8 sealing connection；Granular grows area or expansion joint 3 bottom connection dirt discharge groove 4；Cloud formula collecting region or cloud formula are removed
The outlet of dirt device 5 bottom connection ash exhauster 6 and granular grows area or expansion joint 3 tangentially connects cloud formula collecting region or cloud formula is removed
The upper end of dirt device device.Wherein, described cloud formula collecting region or cloud formula dust arrester 5（With reference to Fig. 2, Fig. 3）Main by being coaxially disposed
, the central cylinder 14 that each other there is cavity, seal off each other, middle cylinder 27, outer cylinder body 23 form, this three
The bottom of body is cone structure, and the cone distal end of middle cylinder 27 and outer cylinder body 23 is inside and outside underflow opening 10,24, should
Inside and outside underflow opening 10,24 passes through flange and ash exhauster 6 connects；The outlet of granular grows area or expansion joint 3 and described intermediate cylinder
Cavity between body 27 and outer cylinder body 23 passes through tangential entry 22 insertion；Several small cyclones separators 28 are with three cylinders
The heart is uniformly fixed on the inwall of middle cylinder 27 for axle；The junction of middle cylinder 27 and its underpart cone is connected with base plate
11, leave air inlet annular distance 26 between the inwall of the outer rim of this base plate 11 and middle cylinder 27；Several small cyclones separators described
28 bottom discharge mouth 9 be fixed on base plate 11 and and middle cylinder 27 bottom cone insertion；Several small cyclones described
The upper end of separator 28 has air inlet 29, the inner chamber insertion of this air inlet 29 and middle cylinder 27；This several cyclonic separation
Bend pipe 12 and central cylinder 14 insertion are passed through in the outlet of device 28 upper end；The top cover 13 that described bend pipe 12 is placed in outer cylinder body top is close
Envelope, this top cover 13 has outlet 15.
The described section of bend pipe 12 outlet and the angle of horizontal plane are 90oTo 180oSo that pressure drop is uniformly distributed.
Described ash exhauster 6 is made up of bed material groove 17, connection valve 19, U-tube 20；Described bed material groove 17 one end with described
Inside and outside underflow opening 10,24 is connected by flange 16, and the other end is connected with U-tube 20 by connection valve 19, this U-tube 20 another
One end is sewage draining exit 21；The bottom of bed material groove 17 is provided with blowoff valve 18.
Described mist generator or atomization box 2 are supersonic atomizer or high-pressure nozzle atomising device or shower nozzle atomization dress
Embodiment 2, mist generator or atomization box 2 are not linked in sequence as shown in Figure 1 with granular grows area or expansion joint 3,
But mist generator or atomization box 2 are arranged on granular grows area or expansion joint 3 side, charging aperture 1 and granular grows area or
Expansion joint 3 is directly connected to, and the fog of mist generator or atomization box 2 generation is born from granular grows area or expansion joint 3 side
Pressure suction, dust-contained airflow is directly contacted with fog in granular grows area or expansion joint 3.Remaining same embodiment 1.
Embodiment 3, described mist generator or atomization box 2 may be installed in granular grows area or expansion joint 3 and make both
Become one.Remaining same embodiment 1.
Embodiment 4, the cloud formula collecting region in embodiment 1 or cloud formula dust arrester 5 are with several cyclone separator and joint group, several
Individual electrostatic precipitator joint group, wet scrubber etc. are replaced.
Embodiment 5, the cloud formula collecting region in embodiment 1 or cloud formula dust arrester 5 can be in parallel multiple.From expansion joint outlet
Place's pipeline is divided into several bifurcated pipe roads, is connected respectively to several cloud formula collecting regions or the import of cloud formula dust arrester, several
Cloud formula collecting region or cloud formula dust arrester are placed in parallel, and the outlet of this several cloud formula collecting region or cloud formula dust arrester remerges
To in a pipeline, it is then attached to fans entrance.Such connection may insure each cloud formula collecting region or cloud formula dedusting dress
Air quantity in putting uniformly, and makes several cloud formula collecting regions or cloud formula dust arrester carry out the receipts to fine particle simultaneously
Collection.The dust removing effects of the present invention are as shown in Figure 4.
Workflow of the present invention：
Under air-introduced machine 7 effect, dust-contained airflow is cut by the tangential entry 22 of cloud formula collecting region or cloud formula dust arrester 5 upper end
To the cavity entering between outer cylinder body 23 and middle cylinder 27, produce rotating flow, under the action of the centrifugal force, carry out the first fraction
From.The coarse granule isolated or drop will fall the cone inwall of outer cylinder body 23 lower end, discharge through outer underflow opening 24.Through
The air-flow of flash trapping stage through air inlet annular distance 26 enter middle cylinder 27 bottom, then from cyclone separator 28 upper end air inlet
Mouth 29 rotates into each cyclone separator 28 respectively, produces rotating flow in cyclone separator 28, carries out the second level and separates.Right
For cyclone separator, it is higher-pressure region near outer wall, center is negative pressuren zone.It is 10 in temperatureoDuring C, water saturation vapour pressure is
1200Pa about, the gas containing steam condenses rapidly in higher-pressure region, and so that dust granules is grown up.Gas condensation containing fine particle
Become drop, the inwall along cyclone separator flows down, enter in the cone of middle cylinder 27 lower end by discharging opening 9, this cone
Interior speed is almost nil, pressure drop also very little, and drop can flow down along cone inwall, discharges from interior underflow opening 10.In each whirlwind
The outlet ends of separator 28 have one outlet elbow 12 respectively, and on the one hand ensure generation is static pressure, rather than dynamic pressure, it is to avoid
Impact to top cover 13, suppression impurity refluence simultaneously；On the other hand ensure that the air quantity of cyclone separator is uniformly distributed.Through processing
Air-flow afterwards enters into the central tube 14 of cloud formula cleaner unit by exit bend 12.In central tube 14, multiple exit bend 12
The air-flow released mutually collides, and so that fine particle is grown up again, realizes the third level and separates.Under blower fan 7 suction function, dedusting
Clean gas flow afterwards is arranged through outlet 15 is outer.
Before equipment runs, first to water filling fluid-tight in ash exhauster 6, make to be full of water in device（The liquid level of U-tube cannot be below
The minimum level of separator）, prevent air from entering device.Flow out from underflow opening with dust-laden liquid, the liquid in blowdown apparatus
More and more, can outwardly discharge, also can connect a row in its lower end in 21 times termination one container collection sewage of sewage draining exit
Dirty pipeline, realizes automatic pollution discharge.Periodically open blowoff valve 18, blowdown cleaning is carried out to device.
The test of dust removing effects of the present invention is as follows：
Test 1：Certain power plant's dedusting.
Charging aperture concentration（g/m3）For 0.2,0.5,1,2,5,30.
Start air-introduced machine 7, under the condition of negative pressure that air-introduced machine 7 produces, dust-contained airflow enters atomizing generator from charging aperture 1
2, it is then fed to granular grows area 3, enter cloud formula collecting region or cloud formula dust arrester 5, outlet is discharged to by air-introduced machine air vent
Concentration mensuration area 8, surveys exit concentration with dust instrument, and exit concentration and efficiency of dust collection are as shown in the table.The present invention is changed to pocket type
Cleaner unit, electrostatic precipitator, cyclone dust extractor and wet scrubber, measurement pressure drop simultaneously calculates efficiency of dust collection.Several efficiency of dust collections
Contrast as shown in Figure 4 it is clear that, the dust removing effects of cyclone dust extractor too low it is impossible to reach high standard alignment request；Electrostatic precipitator is once
Investment is big, and equipment operating cost is high；Easily paste bag phenomenon because of water spray in sack cleaner, and air-flow, by smooth, leads to cloth bag no
Method continues dedusting；Wet dust removal can make equipment corrosion and energy consumption is big, and the efficiency of dust collection of the present invention is much higher.
With air quantity 1200m3As a example/h, the efficiency of dust collection of test cloud formula dust pelletizing system and wet scrubber, and to different grains
Its classification efficiency is surveyed respectively using laser particle analyzer, the corresponding classification efficiency of different diameter airborne particle is as schemed after the particle sampling of footpath
Shown in 5.Now the liquid-gas ratio of wet scrubber is 0.5L/m3.It can be seen that cloud formula dust pelletizing system is less than the thin of 10um to particle diameter
The arresting efficiency of granule is apparently higher than wet scrubber.And water consumption is 600L to wet dust removal per hour, and cloud formula dedusting system
System is only 40L, greatly reduces water consumption.
Test 2：The laboratory present invention and air purifier are to fine particle（PM2.5）The contrast of collecting effect.
In enclosed ventilation cupboard internal-combustion scented incense, stand 1h.In the presence of air inducing machine negative pressure, dusty gas enters cloud
Formula dust pelletizing system purifies, and purified gas is sent back to inside fume hood again, so that fume hood internal gas flow is circulated.With
PM2.5 detector measures PM2.5 and VOCs concentration in fume hood, uses dust instrument and laser particle analyzer to measure different-grain diameter model simultaneously
Enclose the collection efficiency of granule.Cloud formula dust pelletizing system is net in different time to PM2.5 and VOCs in fume hood with air purifier
Change effect such as Fig. 6, Fig. 7, as shown in Figure 8 to the collection efficiency of different-grain diameter range of particle.From Fig. 6, Fig. 7 as can be seen that with
Air purifier is compared, and cloud formula cleaner unit is easier to be preferably minimized PM2.5 and VOCs concentration in fume hood in the shorter time
Value, and minimum is less than air purifier.As can see from Figure 8 with the increase of grain diameter, the receipts of two kinds of dust arresters
Collection efficiency all improves therewith.When grain diameter is 2.5 μm, the collection efficiency of cloud formula dust pelletizing system and air purifier is respectively
99.61% and 91.56%.
Experiment 3：The clean-up effect to vehicle exhaust for the laboratory present invention
In order to study the clean-up effect to vehicle exhaust for the cloud formula dust collection method, by automobile engine tail gas outlet in test
It is connected with the charging aperture of cloud formula dust pelletizing system, and add a certain proportion of alkaline solution in the solution of mist generator, profit
With the negative pressure of air-introduced machine, the tail gas that electromotor is produced passes sequentially through mist generator, granular grows area, cloud formula cleaner unit,
Exit measures fine particle, CO, NO and SO respectively2Concentration, and calculate its removal efficiency.Removal efficiency is as shown in the table.
As can be seen from the table, cloud formula dust collection method can reach 98% to the removal efficiency of fine particle in vehicle exhaust,
And NO, SO can be removed completely2Etc. harmful gass.
From three above test Comparative result analysis as can be seen that the present invention range very wide, commercial production,
Indoor air purification, automobile exhaust pollution have more considerable dust removing effects in administering, and the collection to fine particle PM2.5
Effect is obvious.For increasing of current in the air fine particle, we must not think little of its impact to human body health.But
The dust arrester efficiency that presently, there are is generally low, especially to fine particle（PM2.5）Removal very pessimistic.Cloud formula dust pelletizing system
Abandon the principle filtering in traditional dust collection method and adhering to and method, made full use of " cloud " physicss, make fine particle first
Particle size growth, promotes it effectively to collect.It may be said that cloud formula dust pelletizing system plays the progress of important breakthrough to the collection of PM2.5.