CN206045709U - Separate type acoustic agglomeration suspension fine grained emission-reducing system based on resonant cavity - Google Patents
Separate type acoustic agglomeration suspension fine grained emission-reducing system based on resonant cavity Download PDFInfo
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- CN206045709U CN206045709U CN201620839043.3U CN201620839043U CN206045709U CN 206045709 U CN206045709 U CN 206045709U CN 201620839043 U CN201620839043 U CN 201620839043U CN 206045709 U CN206045709 U CN 206045709U
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Abstract
The utility model discloses a kind of separate type acoustic agglomeration suspension fine grained emission-reducing system based on resonant cavity, closing coupled cavity (5) is of coupled connections with resonance reunion room (7) by adjustable length short tube (8), closing coupled cavity is connected with electrical modulation sound producing head (3) by exponential type horn (4), and electrical modulation sound producing head (3) is connected with a signal generator and power amplifier (20)；Closing coupled cavity is provided with an air vent (9)；Bending sheet-metal duct (6) is provided with resonance reunion room (7).Closing coupled cavity is coupled by length adjustment short tube with resonance reunion room, by adjusting stub length, makes the resonant frequency of resonance reunion room be equal to the optimum reunion frequency of particulate matter in flue gas.Under acoustic wave action, bend the granule vibration in sheet-metal duct in flue gas and produce relative velocity, mutually collide and be agglomerated into the aggregate of greater particle size and settle or eliminated by conventional dust removal equipment.This utility model takes up room little, and energy consumption is low, simple to operate, high with good expansion and efficiency of dust collection.
Description
Technical field
This utility model is related to the fine grain apparatus and method of removing suspension in a set of flue gas, belongs in pollution control equipment
Boiler plant dedusting technology field.
Background technology
The many cities of China especially North China in recent years, the frequency that haze weather occurs more come it is higher, pollute more next
Heavier, particulate matter has become each metropolitan major pollutants, while and room air important pollutant.Suspend thin
During the discharge of grain thing especially PM2.5 (aerodynamic diameter less than 2.5 microns of thin particle) is air environmental pollution
The main source of particulate matter.Fine grained is generally enriched with harmful substance, easily causes serious harm to health and environment.
The cleaner major mechanical separator that often uses at present industrially, cyclone dust extractor etc., simple structure, operation and
It is easily serviced, using relatively broad, with higher total efficiency of dust collection, but the particulate removal to micron, submicron order is imitated
Rate is but very low, and sack cleaner is higher to fine grain removal efficiency, but pressure drop is larger when running, and needs back warp often to change filter
Material, operating cost are higher.
General acoustic agglomeration method is less efficient to the fine grain reunion that suspends under the relatively low sound intensity and frequency, only
40% or so.General acoustic agglomeration method action time is the 3-8 seconds, due to more a height of 10 metre per second (m/s) of typical flue flow velocity with
On, cause resonance reunion chamber size meet greatly very much industry spot demand.
Retrieve in existing patent, obtain related Chinese patent and document is as follows：
1, the patent No.：02276809.2, three-dimensional granule flow dust remover
2, the patent No.：03132195.X, rotating fluidized bed blowback gravel bed filter
3, the patent No.：200510032204, flue type dust removal and purification apparatus
4, the patent No.：01130066.3, coagulation type electrostatic dust removing method and device
5, the patent No.：99106814.9, a kind of ultrasonic vibration dust collection method and device
6, the patent No.：200710132690.6, the device of sound wave and additional seed grain removing grains with combined action thing
And method
7, the patent No.：96105749.1, pumping type dust collection method and dust arrester
8, the patent No.：91102104.6, high efficiency dust remover by magnetization adsorption
In the patent of the above-mentioned relevant particulate removal for retrieving, inhalable suspension fine grained all can not be efficiently removed, according to
Can determine whether that the high volume for reducing discharging equipment under flow condition is larger according to the principle analysis of wherein acoustic agglomeration relevant apparatus.Wherein the 6th
Individual patent is the acoustic agglomeration removing fine particle using additional seed grain, easily causes additional seed grain and suspends
Fine grained is adsorbed onto pipeline wall, removes more inconvenience, and corrosion, and pole when the sound intensity is higher than 160dB in device are easily caused to device
Easily cause, crush newly formed aggregate, it is difficult to ensure that the work of long time stability.8th specially
Profit for the particulate matter for efficiently collecting weak magnetic, and remove conciliate the granule that magnetic adherence is collected on the whole still exist it is very big
Problem.
The resonance reunion room that Conventional sound reunion dust pelletizing system is generally made up of electroacoustic source driving constant section duct, in resonance
The simple standing wave of the indoor formation of reunion or traveling wave.On the one hand, in commercial Application, resonance reunion room section is very big, in order to reach
More satisfactory removal effect, it is desirable to provide very high acoustical power input so that the energy consumption and operating cost of system is higher, it is difficult to
Received by actual commercial Application.On the other hand, in the case where flue gas flow is larger, constant section duct will take larger field
Ground space, system are not compact enough.
Utility model content
Technical problem to be solved in the utility model is to provide that a kind of energy consumption is low, operating cost is relatively low, compact conformation, account for
Little thin to the suspension in coal-burning power plant, the smoke evacuation of heating, the tail gas of large-scale diesel engine and other dust-contained airflows in use ground space
The separate type acoustic agglomeration suspension fine grained emission-reducing system based on resonant cavity removed by granule.
In order to solve above-mentioned technical problem, what this utility model was provided suspends thin based on the separate type acoustic agglomeration of resonant cavity
Grain emission-reducing system, closing coupled cavity are of coupled connections with resonance reunion room by adjustable length short tube, described closing coupled cavity
Sound producing head is modulated by exponential type horn and electric-gas to be connected, described electric-gas modulation sound producing head is connected with a signal generator
With power amplifier；Described closing coupled cavity is provided with an air vent；Described resonance reunion interior is provided with least one
Bending sheet-metal duct.
Two closing coupled cavitys are of coupled connections with resonance reunion room by adjustable length short tube.
Air compressor is modulated sound producing head with described electric-gas by pressurized tank, means for high-pressure gas pipeline and is connected.
Closing coupled cavity described in two couples company with described resonance reunion room by described adjustable length short tube
Connect；Air compressor is modulated sound producing head with the electric-gas described in each by pressurized tank, means for high-pressure gas pipeline and is connected；It is described
Bending sheet-metal duct be respectively arranged at two ends with air inlet and gas outlet, it is transaudient that described bending sheet-metal duct is provided with several
Device, described microphone are communicated to connect with frequency test PC with the sound intensity；Described air inlet is provided with entrance granule density
Test device, described gas outlet are provided with exit granule density test device, the described sound intensity and frequency test PC and
Described exit granule density test device shows PC communication connection with granule density；Described adjustable length short tube and institute
The pressurized tank stated is communicated to connect with the controller of pressurized tank flow with the length of adjustable length short tube.
Described gas outlet is connected with cyclone dust extractor.
Described includes eliminating the strong sound of audibility threshold based on the separate type acoustic agglomeration suspension fine grained emission-reducing system of resonant cavity
The noise elimination splitter of ripple.
Air-introduced machine is provided with described gas outlet.
Valve is provided with described gas outlet.
The described separate type acoustic agglomeration suspension fine grained emission-reducing system based on resonant cavity also includes carrying resonance reunion room
The transfer pipeline with poroid deadener container and gases at high pressure of major part.
The wall thickness of described bending sheet-metal duct is 2 ㎜～4 ㎜.
Using the separate type acoustic agglomeration suspension fine grained emission-reducing system based on resonant cavity of above-mentioned technical proposal, its technology is special
Put and be：
(1) excite the determination of the operating frequency of sound source：Electric-gas is modulated sound producing head and is produced with power amplifier by signal generator
The signal that raw 1000Hz to 2000Hz is exaggerated drives, and gases at high pressure are modulated into the middle low-frequency sound wave that intensity is not less than 150dB；
(2) determination of resonance reunion room resonant frequency：By adjustable-length between closing coupled cavity and resonance reunion room
Short tube is coupled, and the length of adjustment length is adjustable short tube changes the resonance frequency of resonance reunion room (can analogize to last of the twelve Earthly Branches nurse hertz resonant cavity)
Rate, the cross-sectional area of the quadratic sum adjustable length short tube of the resonant frequency are directly proportional to the ratio of the length of adjustable length short tube.
Adjustable length short tube of this utility model from uiform section product, the length by the adjustable short tube of adjustment length are scalable resonance group
The resonant frequency of poly- room.
(3) ash-laden gas is admitted to resonance and reunites in indoor bending sheet-metal duct, the total length for bending sheet-metal duct be containing
The cloud of dust gas turnover bending sheet-metal duct length difference, according to the flow of ash-laden gas, it is determined that bending sheet-metal duct sectional area and
Total length, and the bending sheet-metal duct from inner wall smooth as far as possible, while ensureing that ash-laden gas is low in bending sheet-metal duct
The time of frequency strong sound wave effect reaches predetermined time requirement (3～10 seconds).
(4) determination of the fine grain removal efficiency that suspends：Measurement, the Jing of granule density are carried out at ash-laden gas air inlet
Cross after acoustic agglomeration processes, at gas outlet to process after ash-laden gas carry out the test of granule density, by both
Ratio determines the fine grain removal efficiency that suspends, and decides whether to adjust sound field；
(5) gases at high pressure for producing air compressor, are input to the pressurized tank that can adjust high pressure strength flow, then supply
Modulation electric-gas modulation sound producing head is given, gases at high pressure low frequency strong sound wave is modulated into into through modulation, by exponential type horn to closing
Coupling intracavity radiative acoustic wave；Ash-laden gas Jing air inlets are input to the bending sheet-metal duct for being built in resonance reunion room；Closing coupling
Close chamber to couple by adjustable length short tube with resonance reunion room, resonated with controlling impact by the length of the adjustable short tube of adjustment length
The resonant frequency of reunion room；Resonance strong sound wave is produced by excitation resonance reunion room, using resulting high-energy-density
Sound wave makes the suspension fine grained relative motion in bending sheet-metal duct, can improve the probability that particle is mutually collided, and granule is touched
It is likely to bond after hitting and forms the granule of bigger particle diameter, in the range of the short period, mean particle size can be significantly increased, can
By gravitational settling or conventional dust removal equipment, the bulky grain in ash-laden gas, aggregate are eliminated.
This utility model introduces in-cavity structure and acoustic agglomeration system structure is redesigned, in sound source and resonance
Increase closing coupled cavity and adjustable length short tube the two acoustic elements between reunion room, will be closing coupled cavity, adjustable length short
Pipe, the series connection of resonance reunion room form a kind of adjustable acoustic resonance structure of resonant frequency, make its resonant frequency with particulate matter most
The radiation frequency of excellent acting frequency and sound source is equal, then, when reunion room of resonating reaches resonance state, be internally formed ideal frequency
High sound intensity sound field (more than 150dB), the final purpose for realizing improving reunion emission reduction efficiency and reducing energy consumption.In this utility model,
Air compressor is engaged with pressurized tank, conveyance conduit, modulates the high-voltage power gas that sound producing head provides pressure controllable for electric-gas
Stream；Sound producing head is connected with exponential type horn by flange, and to closing coupling intracavitary irradiation strong sound wave；Closing coupled cavity is together
The reunion room that shakes is coupled by adjustable length short tube；Ash-laden gas air inlet and the bending sheet-metal duct for being built in resonance reunion room
It is connected；Some microphones are respectively placed in bending sheet-metal duct everywhere, lay particle test device at inlet, outlet respectively, use
In the monitoring for realizing sound field and particulate matter removing effect；The conventional equipments such as the port of export and cyclone dust collector of bending sheet-metal duct
It is connected, the air-flow after process is discharged.
This utility model is based on strong audio technology, and the resonant cavity resonance being connected with closing coupled cavity is excited using strong sound wave,
Obtain higher, the relatively stable sound field of the sound pressure level of frequency-adjustable.Make to be placed in resonant cavity using high-energy-density sound field and bend
Suspension fine grained vibration in sheet-metal duct, relative motion are reduced the volume of emission-reducing system and improve particle and mutually collide
Probability.It is likely to bond after particles collision and forms the granule of bigger particle diameter, in the range of the short period, grain diameter increase
Significantly, by gravitational settling, or eliminated so as to reach the purpose that control PM2.5 is discharged by conventional dust removal equipment.
In the case where adjustable middle low-frequency sound source effect is stablized, the resonance of excitation resonance reunion room, generation can be penetrated this utility model
The strong sound wave of bending sheet-metal duct, effectively removes particle diameter in flue micro- less than what 2.5 μm of traditional cleaner was difficult to remove
Rice, submicron particles.
The resonant cavity type acoustic agglomeration of the present utility model fine grain theoretical and calculating process that suspends is as follows：
(1) determination of resonance reunion room resonant frequency
Closing coupled cavity VaIt is S by cross-sectional area0, short tube and resonance reunion room V of the length for lbCoupling, closing coupling
The acoustic impedance of chamber one end mouth of pipe is：
During seeking the sound absorption power of resonant chamber, as ω=ωRWhen, energy absorption reaches greatly, and resonant frequency is full
Sufficient equation
For convenience, if wall is rigidity, obtain approximate solution
WhereinFor stimulating frequency be resonant frequency when correction term.
(2) the orthokinetic Agglomeration Mechanism frequency kernel function caused by sound wave
Between granule, relative excitation amplitude and phase place are expressed as：
Wherein HijFor acoustic wave excitation function, GijFor mutual scattering process function
Consider that intergranular scattering process obtains orthokinetic reunion relative velocity and is：
Wherein u0For acoustic velocity amplitude, τiFor the relaxation time of granule, ω is angular frequency
When considering to scatter interaction between granule, obtaining the orthokinetic cohesion kernel function that interacts is：
For polydisperse granule medium, the relative velocity under orthokinetic interaction is just, to show acoustic wave entrainment not
Ability with the granule of particle diameter is different, is that particle agglomeration creates condition.It is thin for the suspension in this utility model containing various particle diameters
The acoustic agglomeration of granule medium provides theoretical foundation.
(3) the mutual radiation Agglomeration Mechanism frequency kernel function caused by sound wave
Wherein μ be air viscosity coefficient, gijrFor the mutual Fluid Dynamic Equations With Radiation action function of radial direction between granule i, j
The cohesion kernel function of coherent function method is radiated mutually：
For monodispersed granule medium, the relative velocity under mutual radiation interaction for just, former incidence wave and scattered wave
The adjacent particle that causes of nonlinear effect between interaction be mutually convergent granule, be that simple grain footpath suspends fine grain reunion
Create condition.Theoretical foundation is provided for the acoustic agglomeration containing monodispersed granule medium in this utility model.
(4) the reunion kernel function caused by gravitational settling
As non-gaseous particles Media density is far longer than the density of air dielectric, i.e. ρP>>ρg, obtain gravitational settling relative
Speed is：
Wherein g is acceleration of gravity.
The reunion kernel function that gravitational settling causes
For the suspension fine grained medium of same density, exist between the larger granule of particle diameter and the less granule of particle diameter different
Sedimentation velocity, and relative velocity is produced, gravitational settling is also one of foundation of particle agglomeration.It is also nothing that gravitational settling is reunited simultaneously
Reunion foundation main during acoustic wave action.
Therefore total reunion kernel function can be expressed as：
Orthokinetic, mutual radiation, gravitational settling reunion kernel function are independent of each other, therefore total reunion kernel function is that three is linear
Superposition sum.Total reunion kernel function can support this utility model in theory.
The beneficial effects of the utility model are：Strengthen under the exciting of sound wave outside, resonance reunion room occurs resonance, resonance frequency
Rate is adjustable to reach the agglomerating effect for meeting optimum, and with reference to follow-up conventional dust removal device, effectively removing is with complicated particle diameter distribution
Ash-laden gas in suspension fine grained.Under identical acoustical power input condition, the indoor sound intensity of resonance state resonance reunion
Highest, as agglomeration increases with the sound intensity, is internally formed the strong sound field that frequency is equal to optimum acting frequency at which.As a result make
Obtain resonant cavity type acoustic agglomeration system and not only there is more preferable emission reduction effect, and with relatively low energy consumption.Sound field and particulate matter are special
Property monitoring subsystem and the sound intensity, frequency etc. adjust the introducing of subsystem and feedback control procedure emission-reducing system possessed necessarily
Adaptivity, the situation of broader pollution source object and discharged particle dynamic change can be applied to.Meanwhile, adopt
The high-voltage power air-flow of driving electric-gas modulation sound producing head can be made not enter resonance with the separate structure based on in-cavity to reunite
Room, realizes being effectively isolated for power air-flow and flue gas, it is to avoid impact of the power air-flow to flue gas characteristic, it is to avoid resonance is reunited indoor
The appearance of turbulent flow is in order to avoid the aggregate for generating is crushed.By test, device of the present utility model can make the suspension in ash-laden gas
Fine Particles rate reaches more than 70%-80%, and the removal efficiency of mass concentration reaches more than 80%.The system is received suitable for place
The occasion for limiting and having extensive ash-laden gas purification to need.
In sum, this utility model be that a kind of energy consumption is low, operating cost is relatively low, compact conformation, occupied ground space it is little
The suspension fine grained in coal-burning power plant, the smoke evacuation of heating, the tail gas of large-scale diesel engine and other dust-contained airflows is removed
The separate type acoustic agglomeration suspension fine grained emission-reducing system based on resonant cavity.
Description of the drawings
Fig. 1 is structural representation of the present utility model.
Fig. 2 is that structure of the present utility model improves schematic diagram.
Fig. 3 is concrete schematic diagram of the present utility model.
Fig. 4 is overall application structural representation of the present utility model.
In figure：1- air compressors 1,2- pressurized tanks 2,3- electric-gas modulation sound producing head 3, the closing of 4- exponential types horn 4,5-
Coupled cavity 5,6- bending sheet-metal duct 6,7- resonance reunion room 7,8- adjustable lengths short tube 8,9- air vents 9,10- ash-laden gas enter
QI KOU 10,11- entrances granule density test device 11,12- microphones 12,13- granule densities show PC 13,14- length
The length of adjustable short tube is conveyed with the controller 14 of pressurized tank flow, the 15- sound intensitys and frequency test PC 15,16- gases at high pressure
Pipeline 16,17- exits granule density test device 17,18- gas outlets 18,19- cyclone dust extractors 19,20- signal generators
With power amplifier 20.
Specific embodiment
The utility model is described in further detail with reference to the accompanying drawings and examples.
Referring to Fig. 1, a closing coupled cavity 5 is of coupled connections with resonance reunion room 7 by adjustable length short tube 8, is closed
Coupled cavity 5 is modulated sound producing head 3 by exponential type horn 4 and electric-gas and is connected, and electric-gas modulation sound producing head 3 is connected with a signal and sends out
Raw device and power amplifier 20；Closing coupled cavity 5 is provided with the less air vent of bore 9；One is provided with resonance reunion room 7
Individual bending sheet-metal duct 6.The wall thickness of bending sheet-metal duct 6 is 2 ㎜～4mm.
Referring to Fig. 2, a closing coupled cavity 5 is of coupled connections with resonance reunion room 7 by adjustable length short tube 8, is closed
Coupled cavity 5 is modulated sound producing head 3 by exponential type horn 4 and electric-gas and is connected；It is less that closing coupled cavity 5 is provided with a bore
Air vent 9；At least one bending sheet-metal duct 6 is provided with resonance reunion room 7.The wall thickness of bending sheet-metal duct 6 is 4 ㎜.
Referring to Fig. 3, closing coupled cavity 5 is of coupled connections with resonance reunion room 7 by adjustable length short tube 8.Closing coupling
Chamber 5 is modulated sound producing head 3 by exponential type horn 4 and electric-gas and is connected, and electric-gas modulation sound producing head 3 is respectively connected with a signal to be occurred
Device and power amplifier 20.Closing coupled cavity 5 is provided with the less air vent 9 of bore, to ensure to close gas in coupled cavity 5
Flatten weighing apparatus.At least one bending sheet-metal duct 6 is provided with resonance reunion room 7.
Referring to Fig. 4, whole system of the present utility model is divided into sound source, closing coupled chamber, ash-laden gas flow pipe, is
Guided Missiles Service Test Set, feedback control platform.
Concrete connected mode is as follows：Two closing coupled cavitys 5 are coupled with resonance reunion room 7 by adjustable length short tube 8
Connection.Each closing coupled cavity 5 is modulated sound producing head 3 by exponential type horn 4 and electric-gas and is connected, and each electric-gas modulates sound producing head
3 are respectively connected with a signal generator and power amplifier 20.Each closing coupled cavity 5 is provided with the less aerofluxuss of bore
Mouth 9, to ensure to close air pressure balance in coupled cavity 5.Air compressor 1 by pressurized tank 2, means for high-pressure gas pipeline 16 with it is every
Individual electric-gas modulation sound producing head 3 is connected, and each seam sealing shroud closing prevents pressure-air from leaking；It is provided with resonance reunion room 7
At least one bending sheet-metal duct 6, bend sheet-metal duct 6 is respectively arranged at two ends with air inlet 10 and gas outlet 18.Gas outlet 18
It is connected with cyclone dust extractor 19.Bending sheet-metal duct 6 is provided with several microphones 12, microphone 12 and the sound intensity and frequency test
PC 15 is communicated to connect.Air inlet 10 is provided with entrance granule density test device 11, and gas outlet 18 is provided with exit
Grain concentration determination device 17, the sound intensity and frequency test PC 15 and exit granule density test device 17 are shown with granule density
PC 13 is communicated to connect.The control of adjustable length short tube 8 and pressurized tank 2 with the length and pressurized tank flow of adjustable length short tube
Device 14 is communicated to connect.The wall thickness of bending sheet-metal duct 6 is 2 ㎜～4 ㎜.
Air compressor 1 is modulated sound producing head 3 with electric-gas by pressurized tank 2, means for high-pressure gas pipeline 16 and is connected, electric-gas
Modulation sound producing head 3 constitutes sound system to 5 radiative acoustic wave of closing coupled cavity by exponential type horn 4.By closing coupled cavity 5, end
End air vent 9 constitutes closing coupled chamber with adjustable-length short tube 8, and closing coupled cavity 5 utilizes adjustable length with resonance reunion room 7
The coupling composition resonant cavity of short tube 8.The dust-laden being made up of air inlet 10, bending sheet-metal duct 6, gas outlet 18 and cyclone dust extractor 19
Flue gas flow pipe.By entrance granule density test device 11, exit granule density test device 17 and to be placed in bending thin
The composition opening machine system test device of some microphones 12 in wall pipeline 6.The PC 13, sound intensity and frequency test PC are shown by granule density
14 3 part of the controller composition feedback control platform of machine 15, the length of adjustable length short tube and pressurized tank flow.
The resonant frequency of resonance reunion room 7 after adjustable length short tube 8 in closing coupled cavity 5 determines, is calculated, is passed through
Electric-gas is modulated sound producing head 3 and gases at high pressure is modulated into low frequency strong sound wave, and utilization index model cylinder 4 is to spoke in closing coupled cavity 5
Penetrate, excitation resonance reunion room 7 is resonated.
Further, this utility model includes the noise elimination splitter that can eliminate audibility threshold strong sound wave.Addition at gas outlet 18 is drawn
Blower fan.Add valve at gas outlet 18 to force the increasing action time.May also include and carry the major parts such as resonance reunion room 7
Transfer pipeline with poroid deadener container and gases at high pressure.
Referring to Fig. 4, close coupled cavity 5, adjustable length short tube 8, the series connection of reunion room 7 of resonating and form a kind of in-cavity knot
Structure, the resonant frequency of in-cavity are changed by the regulation of the length of adjustable length short tube 8, electric-gas modulate sound producing head 3 by with
Its connection exponential type horn 4 to closing coupled cavity 5 in radiative acoustic wave, make electric-gas modulation 3 sent frequency of sound wave of sound producing head with
The resonant frequency of particulate matter the best use of frequency and in-cavity is equal, then sound wave is through 8 excitation resonance group of adjustable length short tube
Poly- room 7 reaches resonance state, is internally formed the strong sound field of characteristic frequency in resonance reunion room 7.Bar is input in identical acoustical power
Under part, the sound intensity highest in resonance state resonance reunion room 7, as agglomeration increases with the sound intensity, resonant cavity type acoustic agglomeration
System has more preferable emission reduction effect and relatively low energy consumption.Meanwhile, the modulation pronunciation of driving electric-gas can be made using in-cavity structure
3 power air-flow does not enter resonance reunion room 7, realizes being effectively isolated for power air-flow and flue gas, it is to avoid resonate in reunion room 7
The appearance of turbulent flow is in order to avoid the aggregate for generating is crushed.
The gases at high pressure that air compressor 1 is produced enter pressurized tank 2, the high pressure work(before into electric-gas modulation sound producing head 3
The pressure adjustable of rate air-flow, and then adjust the intensity that electric-gas modulation sound producing head 3 produces sound wave.Electric-gas modulation sound producing head 3 is produced
The frequency of sound wave can be adjusted with power amplifier 20 by signal generator.By change closing coupled cavity 5 and resonance reunion room 7 it
Between adjustable length short tube 8 length adjustment resonance reunion room 7 resonant frequency, make which be equal to the frequency of produced sound wave.It is logical
The particulate matter characteristic that entrance granule density test device 11 and exit granule density test device 17 are measured in flue gas is crossed, it is defeated
Enter acoustic agglomeration suspension fine grained Theoretical Calculation and obtain optimal frequency of sound wave and intensity.By aforementioned regulation process, in making system
The sound intensity and frequency are equal to optimum.Measured by entrance granule density test device 11 and exit granule density test device 17
Agglomerating effect, repeats " measurement-calculate-adjust " process if being unsatisfactory for requiring.Realize in particulate matter eventually through feedback control
Optimum emission reduction effect under the conditions of characteristic variations.
Ash-laden gas is entered in the bending sheet-metal duct 6 being placed in resonance reunion room 7, when electric-gas modulates sound producing head 3 and refers to
When the sound wave that number model cylinder 4 is produced makes resonance reunion room 7 reach resonance state by closing coupled cavity 5 and adjustable length short tube 8,
In resonance reunion room 7, strong sound wave is entered in bending sheet-metal duct 6 by wall, the particulate matter applying in flue gas is acted on, is made not
With relative motion between sized particles thing and collide with each other and be agglomerated into the aggregate of greater particle size, and then settle or quilt in downstream
Conventional dust removal equipment is eliminated.
Connect in-cavity structure respectively in 7 both sides of resonance reunion room, the electric-gas modulation sound producing head 3 of both sides passes through respectively
Connected exponential type horn 4 is excited simultaneously to radiative acoustic wave in closing coupled cavity 5, the adjustable length short tube 8 through both sides
Resonance reunion room 7 reaches resonance state.Under conditions of the sound intensity is certain in the resonance reunion room 7, made by way of combination of stimulation
The intensity for obtaining single electric-gas modulation sound producing head 3 declines, it is contemplated that electric-gas modulates sound producing head 3 under compared with low-intensity with higher
Conversion efficiency, combination of stimulation reduce further the energy consumption of whole system.
Referring to Fig. 4, the carrying out practically process of the system is as follows：
The 1st, air compressor 1 is loaded the gases at high pressure of generation by adjustable pressurized tank 2 and gases at high pressure delivery pipe
The input of road 16 electric-gas modulation sound producing head 3, signal generator are provided to electric-gas modulation sound producing head 3 with power amplifier 20 and are exaggerated
The signal of telecommunication；Gases at high pressure are modulated into low frequency strong sound wave by electric-gas modulation sound producing head 3；
2nd, and the electric-gas exponential type horn 4 that matches of modulation sound producing head 3 is used as sound radiator, to greatest extent by electricity-
The strong sound wave of the output of controlled atmosphere sound producing head 3 is radiated into closing coupled cavity 5；
3rd, ash-laden gas is admitted in bending sheet-metal duct 6, makes flue gas in resonance reunion room 7 by bending sheet-metal duct 6
Reach predetermined 3～10s of time requirement interior action times；
4th, the length by adjusting the adjustable length short tube 8 being connected with resonance reunion room 7 controls the resonance of resonance reunion room 7
Frequency；
5th, regulation of the gases at high pressure for producing air compressor 1 through pressurized tank 2, makes gases at high pressure adjustable, realizes sound
It is strong adjustable；
6th, measure resonance and reunite by entrance granule density test device 11 and exit granule density test device 17
Agglomerating effect in room 7, and resonant frequency is adjusted by (3) step adjustment effect time, or (4) step, or (5) step is adjusted
Section input pressure is optimal agglomerating effect to adjust the sound intensity；
7th, the ash-laden gas through resonance reunion room 7 passes through gravitational settling or other conventional dust removal device such as cyclone dust removals
Device 19, the bulky grain in ash-laden gas, aggregate are eliminated.
Good effect can be obtained using this utility model.As use closing coupled cavity 5 is coupled with resonance reunion room 7
Method, adjust the resonant frequency of resonance reunion room 7, can obtain compared with high sound intensity (more than 150dB), thin particle can be made relative
Motion intense, the probability increase mutually collided and bond are obvious, and tradition cleaner unit phase specific energy consumption is little with adopting, efficiency high, expense
It is low.Action intensity using resonant cavity type acoustic agglomeration is big, and obvious turbulent phenomenon does not occur.System operatio simply continuously can be made
With until the fine grained major part in ash-laden gas is reunited.Although the sound intensity is up to more than 150dB, sound group in resonance reunion room 7
Poly- system peripherals can be laid with the noise elimination splitter for eliminating audible sound frequency range strong sound wave, or main using resonance reunion room 7 etc. is carried
Part has the container of poroid deadener, can substantially reduce interference and infringement of the strong sound wave to human body.
Claims (10)
1. a kind of separate type acoustic agglomeration suspension fine grained emission-reducing system based on resonant cavity, is characterized in that：Closing coupled cavity (5) is
It is of coupled connections with resonance reunion room (7) by adjustable length short tube (8), described closing coupled cavity (5) is by exponential type horn
(4) it is connected with electric-gas modulation sound producing head (3), described electric-gas modulation sound producing head (3) is connected with a signal generator and work(
Rate amplifier (20)；Described closing coupled cavity (5) is provided with an air vent (9)；It is provided with described resonance reunion room (7)
At least one bending sheet-metal duct (6).
2. the separate type acoustic agglomeration suspension fine grained emission-reducing system based on resonant cavity according to claim 1, is characterized in that：
Closing coupled cavity (5) described in two is of coupled connections with resonance reunion room (7) by adjustable length short tube (8).
3. the separate type acoustic agglomeration suspension fine grained emission-reducing system based on resonant cavity according to claim 1 and 2, its feature
It is：Air compressor (1) modulates sound producing head (3) by pressurized tank (2), means for high-pressure gas pipeline (16) and described electric-gas
It is connected.
4. the separate type acoustic agglomeration suspension fine grained emission-reducing system based on resonant cavity according to claim 1, is characterized in that：
Closing coupled cavity (5) described in two is by described adjustable length short tube (8) and described resonance reunion room (7) company of coupling
Connect；Air compressor (1) modulates sound producing head by pressurized tank (2), means for high-pressure gas pipeline (16) and the electric-gas described in each
(3) it is connected；Described bending sheet-metal duct (6) is respectively arranged at two ends with air inlet (10) and gas outlet (18), described bending
Sheet-metal duct (6) is provided with several microphones (12), and described microphone (12) is led to frequency test PC (15) with the sound intensity
Letter connection；Described air inlet (10) is provided with entrance granule density test device (11), sets on described gas outlet (18)
There is exit granule density test device (17), the described sound intensity is dense with frequency test PC (15) and described exit granule
Degree test device (17) shows PC (13) communication connection with granule density；Described adjustable length short tube (8) and described pressure
Power tank (2) is communicated to connect with the controller (14) of pressurized tank flow with the length of adjustable length short tube.
5. the separate type acoustic agglomeration suspension fine grained emission-reducing system based on resonant cavity according to claim 4, is characterized in that：
Described gas outlet (18) is connected with cyclone dust extractor (19).
6. the separate type acoustic agglomeration suspension fine grained emission-reducing system based on resonant cavity according to claim 4 or 5, its feature
It is：Described includes eliminating disappearing for audibility threshold strong sound wave based on the separate type acoustic agglomeration suspension fine grained emission-reducing system of resonant cavity
Sound splitter.
7. the separate type acoustic agglomeration suspension fine grained emission-reducing system based on resonant cavity according to claim 4 or 5, its feature
It is：Described gas outlet (18) place is provided with air-introduced machine.
8. the separate type acoustic agglomeration suspension fine grained emission-reducing system based on resonant cavity according to claim 4 or 5, its feature
It is：Described gas outlet (18) place is provided with valve.
9. the separate type acoustic agglomeration suspension fine grained emission-reducing system based on resonant cavity according to claim 4 or 5, its feature
It is：The described separate type acoustic agglomeration suspension fine grained emission-reducing system based on resonant cavity also includes carrying resonance reunion room (7)
Transfer pipeline with poroid deadener container and gases at high pressure.
10. the separate type acoustic agglomeration suspension fine grained emission-reducing system based on resonant cavity according to claim 1 and 2, which is special
Levying is：The wall thickness of described bending sheet-metal duct (6) is 2 ㎜～4 ㎜.
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