CN104587789B - Based on the suspended particulate acoustic agglomeration system and method for Helmholtz resonator array - Google Patents
Based on the suspended particulate acoustic agglomeration system and method for Helmholtz resonator array Download PDFInfo
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- CN104587789B CN104587789B CN201510037974.1A CN201510037974A CN104587789B CN 104587789 B CN104587789 B CN 104587789B CN 201510037974 A CN201510037974 A CN 201510037974A CN 104587789 B CN104587789 B CN 104587789B
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Abstract
The invention discloses a kind of suspended particulate acoustic agglomeration system and method based on Helmholtz resonator array, comprise sonic source device, helmholtz resonance device, control device and ensuring equipment; Sonic source device is made up of the signal generator be connected successively, signal amplifier, sound source, horn and standing wave tube; Helmholtz resonance device is made up of short tube, flue and Helmholtz resonator; Control device is made up of controller and three groups of piston components; Ensuring equipment forms by being arranged on cyclone dust collectors and noise elimination splitter on flue; Signal generator produces sound wave, drives sound source through signal amplifier, and through horn to radiate low sound wave in standing wave tube, first piston component movement regulates Helmholtz resonator volume to make the resonant frequency of flue identical with low-frequency sound wave.The present invention has that reunion efficiency is high, energy consumption is low, simple to operate, advantage rational in infrastructure.
Description
Technical field
The present invention relates to dedusting technology field, refer in particular to a kind of suspended particulate acoustic agglomeration system based on Helmholtz resonator array.
Background technology
Suspension fine grained refers to the solid particulate matter (also claiming PM2.5) that in air, aerodynamic size is less than 2.5 μm.Along with the fast development of Chinese national economy, a large amount of consumption of fossil fuels to such an extent as to PM2.5 has become the major pollutants polluting China's urban area atmospheric environment, causes the close attention of party and state leaders and the deep worry of the people.Suspension fine grained be rich in multiple poisonous trace materials and in atmospheric environment far away, the long action time of fed distance, human body and environment are produced have a strong impact on possibly.
The conventional dust removal technology of extensive use in current industrial can be divided into wet method and the large class of dry method two.Utilize the method for wet dedusting to there is material used to be difficult to reclaim, process, the transfer that such waste material very easily pollutes and high-temperature gas become normal temperature from high temperature and cause the shortcomings such as the waste of the energy and less use, and nonaqueous dust cleaner application is comparatively extensive, as conventional removing sulfuldioxide such as cyclonic separation, although the removal efficiency that these conventional dust removal technology remove suspended coarse particles (>10 μm) is very high, very low to the removal efficiency of suspension fine grained (<2.5 μm).
All effectively can not remove in current various dust collection method and can suck suspension fine grained.Method wherein adopts the acoustic agglomeration of additional seed grain to remove fine particle, easily cause additional seed grain and suspension fine grained to be adsorbed onto pipeline to avoid, remove comparatively inconvenience, easily corrosion is caused to device, and in device there is turbulent flow higher than very easily causing in sound field during 160dB in the sound intensity, make the aggregate fragmentation just formed, be difficult to the work ensureing long time stability; Other method is for the particle of the weak magnetic of Efficient Collection, and the particle that removing reconciliation magnetic adherence is collected on the whole still exists very large problem.
Summary of the invention
For above-mentioned technical problem, it is good that the present invention proposes a kind of expansion performance, can continuous action until in ash-laden gas fine grained major part reunite and reunion efficiency is high, energy consumption is low, simple to operate, the suspended particulate acoustic agglomeration system and method based on Helmholtz resonator array rational in infrastructure.It utilizes the relative motion of high-strength sound field promotion particle so that collision, and after particles collision, bonding forms the particle of more Large stone possibly, then in conjunction with conventional dust removal technology such as cyclonic separation, removes suspended coarse particles, thus reaches the object of control PM2.5 discharge; Native system has good expansion performance, can continuous action until in ash-laden gas fine grained major part reunite; Do not affect pressure drop during this dust pelletizing system effect, and have that reunion efficiency is high, energy consumption is low, simple to operate, rational in infrastructure, the advantages such as operating cost low and action time is short.
Concrete technical scheme of the present invention is:
Based on a suspended particulate acoustic agglomeration system for Helmholtz resonator array, this system comprises sonic source device, helmholtz resonance device and control device; Described sonic source device is made up of the signal generator be connected successively, signal amplifier, sound source, horn and standing wave tube; Described helmholtz resonance device is made up of short tube, flue and Helmholtz resonator; Described standing wave tube is provided with many short tubes, in described flue, correspondence is provided with the Helmholtz resonator of equal number, described standing wave tube is coupled with the Helmholtz resonator in described flue by short tube, and described control device is made up of controller and three groups of piston components; Described piston component is by the stepper motor composition of piston and driven plunger, and described three groups of piston components comprise and being arranged in standing wave tube for regulating the second piston component of standing wave tube inner volume, being arranged in flue for regulating the 3rd piston component of flue volume and being arranged in each Helmholtz resonator for regulating the first piston assembly of each Helmholtz resonator volume; Described signal generator produces sound wave, drives sound source through signal amplifier, and through horn to radiate low sound wave in standing wave tube, first piston component movement regulates Helmholtz resonator volume to make the resonant frequency of flue identical with low-frequency sound wave; Stepper motor in signal generator, signal amplifier and each piston component is all connected with controller and regulates and controls parameter by controller.
As the preferred technical solution of the present invention, the present invention also comprises ensuring equipment, and described ensuring equipment comprises cyclone dust collectors and noise elimination splitter, and cyclone dust collectors are arranged on flue, and noise elimination splitter is laid in the periphery of system.
As the preferred technical solution of the present invention, the frequency of sound wave that described signal generator produces is 1KHz ~ 5KHz, produced the sound wave of 1000Hz to 5000Hz by signal generator, drive sound source through signal amplifier, be not less than the low-frequency sound wave of 145dB through conical horn to radiation intensity in standing wave tube.
Each Helmholtz resonator is by regulating the piston in its respective first piston assembly, to change the volume of Helmholtz resonator, to make the resonant frequency in flue adjustable, make to produce strong resonance sound wave in flue, utilize the suspension fine grained relative motion that the sound field of consequent high-energy-density makes in flue, the piston in the second piston component is regulated to make the sound wave crest location in standing wave tube adjustable, make to change through the sound intensity of short tube to radiation in flue, regulate the piston in the 3rd piston component to make the action time of ash-laden gas in flue adjustable.
Utilize the above-mentioned suspended particulate acoustic agglomeration system based on Helmholtz resonator array, the invention provides a kind of suspended particulate acoustic agglomeration method based on Helmholtz resonator array, its step is as follows:
1) signal that signal generator produces is input to sound source through power amplifier, makes sound source can via horn radiative acoustic wave in standing wave tube;
2) by regulating the length of Helmholtz resonator extra heavy pipe, to regulate and control the resonant frequency of Helmholtz resonator;
3) ash-laden gas is admitted in flue, makes flue gas reach predetermined time requirement in indoor action time of reuniting by regulating flue gas flow rate;
4) ash-laden gas through flue passes through gravitational settling or deduster, the bulky grain in ash-laden gas, aggregate is eliminated.
Helmholtz resonator is formed the array of some by the present invention, the pipeline of this array and ash-laden gas is connected, intercommunication, by modulation signal through signal generator, power amplifier and sound source to radiation in standing wave tube, excite Helmholtz resonator array, make the sound intensity reaching some strength in the flue of conveying ash-laden gas, excite flue inner suspension particle to vibrate, produce relative velocity, mutual collision, be agglomerated into greater particle size aggregate and sedimentation, or eliminated by conventional dust removal equipment thus reach to eliminate and can suck the object of fine grained PM2.5;
Compared with prior art, the invention has the beneficial effects as follows:
Native system comprises sound source, signal generator, power amplifier, smoke conveying duct, Helmholtz resonator array, standing wave tube, cyclone dust collectors etc.It is little that the present invention has expense, and energy consumption is low, simple to operate, rational in infrastructure, has good expansion performance and efficiency of dust collection advantages of higher.
The signal that signal generator produces by the present invention is through signal amplifier, be input to sound source and make sound source through horn to radiative acoustic wave in standing wave tube, the flue be coupled with standing wave tube, make to produce strong resonance sound wave in flue, utilize the suspension fine grained relative motion that the sound field of consequent high-energy-density makes in flue, the probability that suspended particulate collides mutually can be improved, after particles collision, bonding forms the particle of more Large stone possibly, within the short period, mean particle size can enlarge markedly, by the wind deduster of gravitational settling or employing by the bulky grain in ash-laden gas, aggregate is eliminated.
Accompanying drawing explanation
Fig. 1 structural representation of the present invention.
Number in the figure represents: 1, signal generator; 2, signal amplifier; 3, sound source; 4, horn; 5, standing wave tube; 6, the second regulating piston; 7, the second stepper motor; 8, short tube; 9, the 3rd regulating piston; 10, the 3rd stepper motor; 11, flue; 12, Helmholtz resonator; 13, the first stepper motor; 14, cyclone dust collectors; 15, controller; 16, noise elimination splitter; 17, the first regulating piston.
Detailed description of the invention
The invention provides a kind of specific embodiment of the suspended particulate acoustic agglomeration system based on Helmholtz resonator array, comprise sonic source device, helmholtz resonance device, control device and ensuring equipment; Sonic source device is made up of the signal generator 1 be connected successively, signal amplifier 2, sound source 3, pyramid type horn 4 and standing wave tube 5; Helmholtz resonance device is made up of with Helmholtz resonator 12 short tube 8, dust-laden flue 11, and wherein the quantity of Helmholtz resonator 12 is multiple, is arranged in flue 11; Control device is made up of controller 15 and three groups of piston components; Ensuring equipment forms by being arranged on cyclone dust collectors 14 and noise elimination splitter 16 on dust-laden flue 11; Standing wave tube 5 is coupled with the Helmholtz resonator 12 in dust-laden flue 11 by short tube 8, and three groups of piston components comprise for regulating the second piston component of standing wave tube 5 inner volume, for regulating the 3rd piston component of dust-laden flue 11 volume and many groups for regulating the first piston assembly of Helmholtz resonator 12 volume; Signal generator 1 produces sound wave, sound source 3 is driven through signal amplifier 2, through conical horn 4 to radiate low sound wave in standing wave tube 5, first piston component movement regulates Helmholtz resonator 12 volume to make the resonant frequency of dust-laden flue 11 identical with low-frequency sound wave.
Operation principle composition graphs 1 of the present invention is summarized as follows: the sound wave being produced 1000Hz to 5000Hz by signal generator 1, drives sound source 3 through signal amplifier 2, is not less than the low-frequency sound wave of 145dB through conical horn 4 to radiation intensity in standing wave tube 5; Standing wave tube 5 is coupled with Helmholtz resonator 12 by short tube 8, Helmholtz resonator 12 is by first piston assembly (comprising the first stepper motor 13 and the first regulating piston 17), to change the volume of Helmholtz resonator 12, to make the resonant frequency in flue 11 adjustable; Make to produce strong resonance sound wave in flue 11, utilize the suspension fine grained relative motion that the sound field of consequent high-energy-density makes in flue 11, the probability that suspended particulate collides mutually can be improved, after particles collision, bonding forms the particle of more Large stone possibly, within the short period, mean particle size can enlarge markedly, and by gravitational settling or cyclone dust collectors 14, the bulky grain in ash-laden gas, aggregate is eliminated; Wherein make the sound wave crest location in standing wave tube 5 adjustable by the second piston component (comprising the second regulating piston 6), make to change through the sound intensity of short tube 8 to radiation in flue 11; Adjustable 3rd regulating piston 9 makes the action time of ash-laden gas in flue 11 adjustable; Signal generator 1, signal amplifier 2, first stepper motor 13, second stepper motor 7, the 3rd stepper motor 10 (the 3rd piston component comprises the 3rd regulating piston 9 and the 3rd stepper motor 10) regulate and control parameter by controller 15.
Utilize the present invention that the acoustic agglomeration of suspended particulate (particle diameter is less than 10 μm) can be made to obtain good effect.Due to the method using short tube 8 to be coupled with Helmholtz resonator 12, regulate the resonant frequency of reunion room, comparatively high sound intensity (more than 150dB) can be obtained, thin suspended particulate relative motion can be made violent, mutual collision and the probability that bonds increases obviously, little with the traditional deduster phase specific energy consumption of employing, efficiency is high, and expense is low.Adopt this type reunion cabin that the action intensity of acoustic agglomeration can be made large, effective.Dynamic System simply can continuous action until in ash-laden gas fine grained major part reunite.Although reunite, the indoor sound intensity can reach more than 150dB, but acoustic agglomeration system peripherals can be laid with the noise elimination splitter 16 eliminating audible sound frequency range strong sound wave, or adopt the major parts such as carrying reunion room to have the container of poroid deadener, obviously can reduce strong sound wave to the interference of human body and infringement.
The specific works step of native system is as follows:
(1) signal that signal generator 1 produces is input to sound source 3 through power amplifier, makes sound source 3 can via conical horn 4 radiative acoustic wave in standing wave tube 5;
(2) by regulating the length of Helmholtz resonator extra heavy pipe, to regulate and control the resonant frequency of Helmholtz resonator;
(3) ash-laden gas is admitted in flue 11, makes flue gas reach predetermined time in indoor action time of reuniting want (3 ~ 10s) by regulating flue gas flow rate;
(4) ash-laden gas through flue 11 passes through gravitational settling or other conventional dust removal devices such as cyclone dust collectors 14, the bulky grain in ash-laden gas, aggregate is eliminated.
In the present invention in indication, low frequency strong sound wave be frequency 200 to 2kHz and the sound intensity higher than the sound wave of 145dB, the signal generator 1 used produces the low frequency and narrow bandwidth signal of telecommunication or the single-frequency signal of telecommunication of 200 to 2kHz.
The present invention can comprise the noise elimination splitter 16 can eliminating audibility threshold strong sound wave, and flue 11 gas outlet place adds air-introduced machine, and flue 11 gas outlet place adds valve to force the increasing action time.
Therefore adopt the present invention coal-fired power plant, heating company or other can produce the energy resource system of a large amount of ash-laden gas, good effect will be obtained in the particle in reducing, removing smoke.
According to different actual needs, the power amplifier 2 of different capacity, sound source 3 or other form air-flow sound sources, other resonant cavity shapes, the length of short tube 8 and Helmholtz resonator 12 shape can be selected.
Self-evident, sound source 3 power difference or other forms of air-flow sound source, the horn 4 of other shapes, the closed coupler of other shapes or different resonant cavity all belong to distortion of the present invention, must drop in the protection domain of this patent.
Claims (4)
1. based on a suspended particulate acoustic agglomeration system for Helmholtz resonator array, it is characterized in that, system comprises sonic source device, helmholtz resonance device and control device; Described sonic source device is made up of the signal generator be connected successively, signal amplifier, sound source, horn and standing wave tube; Described helmholtz resonance device is made up of short tube, flue and Helmholtz resonator; Described standing wave tube is provided with many short tubes, in described flue, correspondence is provided with the Helmholtz resonator of equal number, described standing wave tube is coupled with the Helmholtz resonator in described flue by short tube, and described control device is made up of controller and three groups of piston components; Described piston component is by the stepper motor composition of piston and driven plunger, and described three groups of piston components comprise and being arranged in standing wave tube for regulating the second piston component of standing wave tube inner volume, being arranged in flue for regulating the 3rd piston component of flue volume and being arranged in each Helmholtz resonator for regulating the first piston assembly of each Helmholtz resonator volume; Described signal generator produces sound wave, sound source is driven through signal amplifier, through horn to radiate low sound wave in standing wave tube, first piston component movement regulates Helmholtz resonator volume to make the resonant frequency of flue identical with low-frequency sound wave, and the stepper motor in signal generator, signal amplifier and each piston component is all connected with controller and regulates and controls parameter by controller.
2. the suspended particulate acoustic agglomeration system based on Helmholtz resonator array according to claim 1, it is characterized in that, also comprise ensuring equipment, described ensuring equipment comprises cyclone dust collectors and noise elimination splitter, cyclone dust collectors are arranged on flue, and noise elimination splitter is laid in the periphery of system.
3. the suspended particulate acoustic agglomeration system based on Helmholtz resonator array according to claim 1, it is characterized in that, the frequency of sound wave that described signal generator produces is 1KHz ~ 5KHz, the sound wave of 1000Hz to 5000Hz is produced by signal generator, drive sound source through signal amplifier, be not less than the low-frequency sound wave of 145dB through conical horn to radiation intensity in standing wave tube.
4. the suspended particulate acoustic agglomeration system based on Helmholtz resonator array according to claim 1, it is characterized in that, each Helmholtz resonator is by regulating the piston in its respective first piston assembly, to change the volume of Helmholtz resonator, to make the resonant frequency in flue adjustable, make to produce strong resonance sound wave in flue, utilize the suspension fine grained relative motion that the sound field of consequent high-energy-density makes in flue, the piston in the second piston component is regulated to make the sound wave crest location in standing wave tube adjustable, make to change through the sound intensity of short tube to radiation in flue, the action time regulating the piston in the 3rd piston component to make ash-laden gas in flue is adjustable.
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