CN107029509B - PM2.5 particulate matter sound wave agglomeration chamber in industrial flue gas and emission reduction device thereof - Google Patents

PM2.5 particulate matter sound wave agglomeration chamber in industrial flue gas and emission reduction device thereof Download PDF

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CN107029509B
CN107029509B CN201710346443.XA CN201710346443A CN107029509B CN 107029509 B CN107029509 B CN 107029509B CN 201710346443 A CN201710346443 A CN 201710346443A CN 107029509 B CN107029509 B CN 107029509B
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sound
flue gas
standing wave
cylinder
smoke
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CN107029509A (en
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肖科
彭燕
程甦
潘传武
陈克坚
陈玲凤
赵云
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Hunan Saineng Environmental Measurement Technology Co ltd
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Hunan Saineng Environmental Measurement Technology Co ltd
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D51/00—Auxiliary pretreatment of gases or vapours to be cleaned
    • B01D51/02—Amassing the particles, e.g. by flocculation
    • B01D51/06—Amassing the particles, e.g. by flocculation by varying the pressure of the gas or vapour
    • B01D51/08—Amassing the particles, e.g. by flocculation by varying the pressure of the gas or vapour by sound or ultrasonics
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D50/00—Combinations of methods or devices for separating particles from gases or vapours
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2258/00—Sources of waste gases
    • B01D2258/02—Other waste gases
    • B01D2258/0283—Flue gases
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
    • Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
    • Y02A50/2351—Atmospheric particulate matter [PM], e.g. carbon smoke microparticles, smog, aerosol particles, dust

Abstract

The invention provides a PM2.5 particulate matter sound wave emission reduction device in industrial flue gas, which is characterized in that a radial central partition plate is used for partitioning the transverse section of a sound wave agglomeration chamber to form a bunched flue gas pipeline which is annularly arranged. Through the sound guiding structure between the central partition board and the inner wall of the sound wave aggregation chamber, single or multiple strong sound wave excitation is applied to the middle position of each clustered smoke pipeline, and the excitation direction is perpendicular to the smoke flow direction in the pipeline. Through the inlet, the outlet and the sound transmission position of the clustered smoke pipeline, the smoke inlet sound blocking structure and the air isolation sound transmission structure are increased, and the axial dimension of the smoke pipeline with integral multiple of half wavelength is matched, so that the full functions of high sound intensity sound waves with specific frequency and particulate matters in smoke are completed in each pipeline. On the premise of compact structure of the device, the sound wave agglomeration fine particulate matter emission reduction effect with high efficiency and low energy consumption is realized.

Description

PM2.5 particulate matter sound wave agglomeration chamber in industrial flue gas and emission reduction device thereof
Technical Field
The invention relates to the technical field of sonic dust removal, in particular to a PM2.5 particulate matter sonic agglomeration chamber in industrial flue gas and an emission reduction device thereof.
Background
Fine particulate matter mainly comprising PM2.5 becomes a main pollutant of the urban atmospheric environment in China. The acoustic agglomeration emission reduction refers to increasing the particle size of fine particles in the flue gas through the interaction of strong acoustic waves and the particles in the flue gas, so that the cleaning efficiency of conventional dust removal equipment on the fine particles is remarkably improved. As a non-contact emission reduction method, the acoustic agglomeration method has short action time, obvious effect, economy and easy use, can adapt to high-temperature, high-pressure and corrosive environments, and is a special pollution source fine particulate matter emission reduction technology with good engineering application prospect.
In the industrial application environment, the flow rate of industrial flue gas is 9-12 m/s, and the action time of the sonic agglomeration is more than 3-5 seconds, so that the sedimentation of particles in the flue gas on the wall surface of a pipeline is avoided, and the flue gas flows in the vertical direction in a sonic agglomeration chamber. An existing acoustic agglomeration emission reduction method, such as CN200920230547.5, discloses an acoustic agglomeration composite bag type dust collector which adopts a pipeline with a uniform section as an acoustic agglomeration chamber of a space where acoustic waves interact with smoke. The axial length of the acoustic agglomeration chamber is equal to the internal flue gas flow rate multiplied by the acoustic action time. Under the condition of large industrial flue gas flow, in order to ensure effective action time of sound waves, the sectional area of the sound wave agglomeration chamber needs to be increased, and if the axial length of the sound wave agglomeration chamber is only increased, the axial length of the sound wave agglomeration chamber, namely the height direction, can exceed the limit of an industrial site. If the cross-sectional area of the acoustic wave aggregation chamber is increased and the flow velocity of the flue gas in the tower is reduced, a reverberation sound field can be formed in the acoustic wave aggregation chamber. The required sound power is equal to the sound intensity multiplied by the cross-sectional area under the same sound wave intensity, and the increase of the cross-sectional area can lead to the driving of a strong sound source which needs larger power, and even a plurality of strong sound sources are required to be excited side by side, so that the economical efficiency is not guaranteed. Similarly, CN201210115860.0 discloses a flue gas purifying device for ultrasonic agglomeration of PM2.5 particles and a purifying method thereof, and the device adopts a rectangular chamber as an acoustic agglomeration chamber. On the other hand, in CN201210115860.0, the ultrasonic wave in the ultrasonic frequency band is adopted for dust removal, so that under the industrial application environment, the propagation attenuation of the ultrasonic wave is more remarkable, and the intensity and the action effect of the ultrasonic wave in the action space can not be ensured.
Therefore, none of the above patents can effectively solve the problems of limited field space and economical use in industrial application scenes at the same time.
Disclosure of Invention
In order to solve the technical problems, the invention provides a PM2.5 particulate matter sonic agglomeration chamber in industrial flue gas and an emission reduction device thereof.
The invention provides a PM2.5 particulate matter sound wave emission reduction device in industrial flue gas, which comprises a cylinder, a standing wave baffle plate and an airflow strong sound source for radiating sound waves into the cylinder, wherein two ends of the cylinder are respectively provided with a smoke inlet and a smoke outlet, and two ends of the cylinder are respectively provided with a smoke-permeable sound-blocking structure; the standing wave baffle is inserted into the cylinder body to divide the cylinder body into a plurality of standing wave tube units which radiate outwards by taking the axis of the cylinder body as a central line, and any two adjacent standing wave tube units are isolated from each other; the air flow strong sound source is arranged on the outer wall of the cylinder body and is communicated with the sound guide pipe which is used for isolating air generated by the air flow strong sound source and conducting sound waves to each standing wave pipe unit; two ends of the sound guide tube are connected with two ends of the cylinder body, and at least one air-isolation and sound-transmission part for transmitting sound waves to each standing wave tube unit is arranged on the side wall of the sound guide tube.
Further, the axis of the sound guide pipe and the axis of the cylinder are overlapped and arranged at the center of the cylinder, two ends of the sound guide pipe extend out of two ends of the cylinder respectively, one end of the sound guide pipe is provided with an airflow strong sound source, and the other end of the sound guide pipe is provided with an exhaust cover plate; a plurality of air-isolation and sound-transmission parts are arranged on the side wall of the sound guide pipe at intervals.
Further, the flue gas collecting device also comprises a gas guide cover for guiding the flue gas into the cylinder body in a concentrated mode, and the gas guide cover is respectively covered on the flue gas inlet and the flue gas outlet.
Further, the sound guide tube is a first standing wave tube unit, the air flow strong sound source is arranged on the side wall of the cylinder body, sound waves are introduced into the first standing wave tube unit, the first standing wave tube unit is formed by enclosing a first standing wave baffle plate, a second standing wave baffle plate and the inner wall of the cylinder body, and an air isolation and sound transmission part is arranged on the second standing wave baffle plate far away from the air flow strong sound source; at least one radiation port for enabling sound waves to propagate in a Z shape in the standing wave tube unit is arranged on the rest standing wave baffle plates, and any adjacent radiation ports are arranged far away from each other.
Further, the device also comprises an acoustic horn, and the strong air flow sound source is communicated with the horn through the acoustic horn.
Further, the strong air flow sound source is arranged in the middle of the cylinder.
Further, the axial length of the standing wave tube unit is an integral multiple of half wavelength of the optimal frequency of acoustic agglomeration of particulate matters in the flue gas.
Further, the cross section area of the standing wave tube unit is four times of the square of the sound velocity of air divided by the square of the optimal frequency of the sound wave agglomeration of the particles in the flue gas.
The invention further provides a PM2.5 particulate matter acoustic wave emission reduction device in industrial flue gas, which comprises at least one PM2.5 particulate matter acoustic wave aggregation chamber in the industrial flue gas.
Further, the device comprises a plurality of mutually-connected PM2.5 particulate matter sonic agglomeration chambers in the industrial flue gas.
The invention has the technical effects that:
the invention provides a sound wave emission reduction device for PM2.5 particles in industrial flue gas, which is particularly suitable for treating the industrial flue gas, and has the advantages of compact structure, low energy consumption and high emission reduction efficiency. The flue gas flows in the acoustic wave aggregation chamber along the vertical direction, and the section of the acoustic wave aggregation chamber is partitioned by a central partition plate structure into a series of standing wave tube units which are annularly arranged along the circumferential direction. And forming an acoustic guide structure in the acoustic wave aggregation chamber, and conveying strong acoustic waves generated by an air strong acoustic source near the inlet of the acoustic wave aggregation chamber to the middle position of each standing wave tube unit. The direction of strong acoustic wave excitation in the standing wave tube unit is perpendicular to the smoke flow direction. By adjusting the axial length of the standing wave tube unit, the strong sound wave with specific frequency generates a resonance sound field with the sound pressure level higher than 150dB in the standing wave tube unit. Through the interaction of strong sound waves and suspended fine particles in the flue gas, the fine particles in the emission of the industrial pollution source are effectively removed.
The above and other aspects of the present invention will be apparent from and elucidated with reference to the following description of various embodiments of an acoustic agglomeration chamber for PM2.5 particulate matter in industrial flue gas and an emission abatement device therefor according to the present invention.
Drawings
FIG. 1 is a schematic cross-sectional front view of a PM2.5 particulate sonic agglomeration chamber in industrial flue gas in accordance with a preferred embodiment of the present invention;
FIG. 2 is a schematic perspective view of a sonic agglomeration chamber for PM2.5 particles in industrial flue gas according to a preferred embodiment of the present invention;
FIG. 3 is a schematic front view of an acoustic agglomeration chamber for PM2.5 particulate matter in industrial flue gas according to a preferred embodiment of the present invention;
FIG. 4 is a schematic cross-sectional view of A-A of FIG. 3;
FIG. 5 is a schematic cross-sectional view of B-B of FIG. 3;
FIG. 6 is a schematic perspective view of an acoustic agglomeration chamber for PM2.5 particles in industrial flue gas according to another preferred embodiment of the invention;
FIG. 7 is a schematic top view of an acoustic agglomeration chamber for PM2.5 particulate matter in industrial flue gas according to another preferred embodiment of the invention;
FIG. 8 is a schematic view in section C-C of FIG. 7;
fig. 9 is a schematic view of section D-D of fig. 8.
Legend description:
100. a cylinder; 110. an air guide cover; 200. a standing wave separator; 300. an airflow strong sound source; 400. a smoke-permeable sound-blocking structure; 500. an acoustic pipe; 510. an air-blocking and sound-transmitting part; 520. an exhaust cover plate; 600. a standing wave tube unit; 700. acoustic horn.
Detailed Description
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention.
Referring to fig. 1, the acoustic wave agglomeration chamber for PM2.5 particulate matters in industrial flue gas provided by the invention comprises a cylinder 100, a standing wave baffle 200 and an airflow strong sound source 300 for radiating sound waves into the cylinder 100, wherein two ends of the cylinder 100 are respectively provided with a smoke inlet and a smoke outlet, and two ends of the cylinder 100 are respectively provided with a smoke-permeable and sound-blocking structure 400; the standing wave baffle 200 is inserted into the cylinder 100 to divide the cylinder 100 into a plurality of standing wave tube units 600 radiating outwards by taking the axis of the cylinder 100 as the central line, and any two adjacent standing wave tube units 600 are isolated from each other; the air flow strong sound source 300 is arranged on the outer wall of the cylinder 100 and is communicated with the sound guide pipe 500 for isolating the air generated by the air flow strong sound source 300 and conducting sound waves to each standing wave pipe unit 600; two ends of the sound guide pipe 500 are connected with two ends of the cylinder 100, and at least one air-isolation and sound-transmission part 510 for transmitting sound waves to each standing wave pipe unit 600 is arranged on the side wall of the sound guide pipe 500.
Referring to fig. 2 to 5, in this embodiment, the acoustic wave aggregation chamber includes a cylinder 100, a standing wave tube partition, an airflow strong sound source 300, a smoke-permeable sound-blocking structure 400, and a sound guide tube 500, which prevents the acoustic wave in the cylinder 100 from leaking out through the smoke-permeable sound-blocking structure 400, and enables the smoke to permeate into the cylinder 100. The air outlet end of the cylinder 100 is also provided with a smoke-permeable and sound-blocking structure 400 and serves the same function.
Preferably, a plurality of air guide hoods 110 are respectively provided on the top and bottom surfaces of the cylinder 100. The upper cover of the air inlet end of the cylinder 100 is provided with an air guide cover 110, and the air guide cover 110 can intensively guide the industrial flue gas to be treated into the cylinder 100. The air outlet end of the cylinder 100 is also provided with an air guide cover 110, and the same effect is achieved. The smoke-permeable and sound-blocking structure 400 is arranged at the joint of the air inlet end of the cylinder 100 and the air guide cover 110.
The sound guide tube 500 is arranged in the cylinder 100, and the axis of the sound guide tube 500 coincides with the axis of the cylinder 100. The two ends of the sound guide tube 500 extend out of the cylinder 100, respectively, and are connected with the outside of the cylinder 100. The strong airflow sound source 300 is communicated with the sound guide 500. The flow rate and flow of industrial flue gas are large, the required sound power is generally more than one ten thousand watts, and the common airflow strong sound source 300 is a sound source for converting high-pressure gas energy into sound energy, and can discharge extra airflow except the flue gas while outputting sound waves. In order to prevent the gas flow generated by the strong gas flow source 300 from diluting the smoke concentration, the efficiency of sonic agglomeration is reduced. In this embodiment, the airflow-strong sound source 300 is disposed on the air inlet end of the cylinder 100, and the axis of the airflow-strong sound source 300 coincides with the axis of the cylinder 100. The air outlet end of the air flow strong sound source 300 is connected with one end of the sound guide pipe 500, and the sound guide pipe 500 can convey the sound wave-containing air flow generated by the air flow strong sound source 300 to the air outlet end of the cylinder 100. An exhaust cover 520 is provided at the other end of the sound guide pipe 500 and protrudes out of the cylinder 100. The vent cover 520 prevents leakage of the intense sound waves while achieving the purpose of channeling out a large amount of gas generated by the intense sound source 300.
A plurality of standing wave spacers 200 are provided on the outer sidewall of the sound guide 500 along the circumference of the sound guide 500. One end of the standing wave baffle 200 is fixedly connected to the outer wall of the sound guide pipe 500, and the other end of the standing wave baffle is formed by outwards scattering and extending by taking the sound guide pipe 500 as the center and is abutted against the inner wall of the cylinder 100. The standing wave baffle 200 divides the interior of the cylinder 100 into a plurality of standing wave tube units 600 uniformly distributed along the circumference of the sound guide tube 500.
Referring to fig. 1-2, a plurality of air-blocking and sound-transmitting portions 510 are provided at intervals on the side wall of the sound guide tube 500. The air-blocking and sound-transmitting portion 510 can only transmit sound waves to act on industrial fumes inside the cylinder 100. The air-blocking and sound-transmitting parts 510 arranged at the transverse excitation positions of the inner sides of the standing wave tube units 600 can avoid the adverse effect of the additional air from the strong air flow sound source 300 on the agglomeration process of the fine particles of the smoke on the premise of not reducing the intensity of the sound waves.
The strong sound waves generated by the air strong sound source 300 transmit the sound waves to the inside of the cylinder 100 through the sound guide pipe 500, and one or more lateral excitations are generated at the middle of each standing wave pipe unit 600. Preferably, the axial length of the standing wave tube unit 600 is an integer multiple of half a wavelength of the optimal frequency of acoustic agglomeration of particulate matter in the flue gas. At this time, the sound wave can reach a resonance state in the standing wave tube. The cross-sectional area of the standing wave tube unit 600 is four times the square of the air sound velocity divided by the square of the optimum frequency of acoustic agglomeration of particulate matter in the flue gas. The arrangement can generate a plane standing wave field with the maximum sound pressure level of more than 150dB in the standing wave tube unit 600, so that the resonance agglomeration capacity of the sound wave energy on particles in industrial flue gas is improved under the conditions of smaller volume of the cylinder body 100 and smaller sound wave power.
Optimal frequency f of acoustic agglomeration of particulate matter in flue gas opt The particle size can be estimated by:
Figure BDA0001296606270000041
wherein ρ is p Mu is the kinematic viscosity coefficient of air and d is the density of particles 1 And d 2 The equivalent diameters of larger particles and smaller particles with the largest content of the particles in the flue gas are respectively.
The standing wave tube unit 600 is enclosed by the inner wall of the cylinder 100, two adjacent standing wave baffles 200, the outer wall of the sound guide tube 500 and smoke-permeable and sound-resistant structures 400 at two ends of the cylinder 100, and in the area of the standing wave tube unit 600, strong sound waves interact with particles in smoke. When in use, industrial flue gas enters the standing wave tube unit 600 in the cylinder 100 from the top surface of the cylinder 100 through the smoke-permeable sound-blocking structure 400, and flows towards the other end of the cylinder 100 along the axial direction of the standing wave tube unit 600. When the strong sound wave generated by the strong air flow sound source 300 is transmitted to the middle part of the standing wave tube unit 600 through the sound guide tube 500, the strong sound wave enters the standing wave tube unit 600 after passing through the air insulation and sound transmission part 510. The strong acoustic wave forms a lateral excitation on the inner side of the standing wave tube unit 600, generating a high intensity standing wave acoustic field inside the standing wave tube unit 600. The acoustic field interacts with the smoke particles in the standing wave tube unit 600, and most of the fine particles form agglomerates with larger size under the vibration action of the acoustic wave. After the smoke containing the agglomerates passes through the smoke-permeable sound-blocking structure 400 positioned on the air outlet end of the cylinder 100, part of the agglomerates are blocked by the smoke-permeable sound-blocking structure 400, and the treated smoke is discharged. The additional air flow generated by the strong air flow source 300 is discharged through the exhaust cover 520.
Aiming at the problems of higher energy consumption, larger device size and the like of a conventional agglomeration device under the condition of large industrial smoke flow, the invention fully utilizes the internal space of the acoustic agglomeration chamber, greatly improves the agglomeration efficiency along with the increase of sound pressure level, optimizes the flue and internal acoustic structures in the cylinder 100, reasonably arranges the smoke inlet sound blocking structure and the air isolation sound transmitting structure under the condition of unchanged input sound power, realizes longer flow stroke of smoke in a standing wave sound field in a resonance state, and avoids the adverse effect of extra airflow of the airflow strong sound source 300 on the agglomeration process. The device has compact structure, better economy, lower energy consumption and higher emission reduction efficiency.
Another embodiment: referring to fig. 3 to 4, an air stream intense sound source 300 is provided at the bottom of the cylinder 100. The sound guide pipe 500 is provided with 3 air-insulating and sound-transmitting parts 510 at intervals. Referring to fig. 5, the standing wave separator 200 is disposed in the cylinder 100 in a cross-section of a meter shape, and this arrangement enables the smoke to be uniformly distributed side by side among the standing wave tube units 600.
In another embodiment, referring to fig. 6 to 9, the first standing wave tube unit 600 is used as the sound guide tube 500 in this embodiment. The strong airflow sound source 300 is disposed on the sidewall of the cylinder 100 and connected to the sidewall of the cylinder 100 through the acoustic horn 700. Preferably, the strong air current sound source 300 is provided at the middle of the cylinder 100 to facilitate the transmission of sound waves. The strong air flow sound source 300 is arranged opposite to the first standing wave tube unit 600, and the first standing wave tube unit 600 is surrounded by the first standing wave baffle 200, the second standing wave baffle 200 and the inner side wall of the cylinder 100. The first standing wave separator 200 is not provided with an acoustic wave outlet. The second standing wave separator 200 is provided at an end remote from the strong air flow sound source 300 with a radiation port having an air-blocking and sound-transmitting effect. The first standing wave tube unit 600 is used as the sound guide tube 500 in this configuration. The discharge of the gas generated from the strong air current sound source 300 is achieved through the smoke-permeable sound blocking structures 400 at both ends of the first standing wave tube unit 600, and simultaneously the sound waves are radiated outward through the radiation ports on the second standing wave barrier 200. Thereby achieving the vibration agglomeration effect on the smoke in the other standing wave tube units 600.
At least one radiation port is provided in each of the other standing wave barriers 200. A radiation port is provided in the third standing wave separator 200 adjacent to the second standing wave separator 200, the radiation port being provided away from the radiation port in the second standing wave separator 200, and so on, a plurality of radiation ports being provided at opposite ends of each standing wave separator 200 away from each other. The sound wave generated by the strong air flow sound source 300 is firstly transmitted through the first radiation port, then flows through the standing wave tube units 600 enclosed by the whole second standing wave baffle 200 and the third standing wave baffle 200, and then leaves the second radiation port, so that the sound wave is pushed in each adjacent standing wave tube unit 600 to move along a 'V' -shaped route.
The strong sound waves generated by the strong air flow sound source 300 sequentially excite the standing wave tube units 600 in the circumferential direction in a reciprocating serial manner through a plurality of radiation ports (the first radiation port is mounted with the air-blocking and sound-transmitting portion 510) provided on the radial blades of the standing wave barrier 200. The standing wave baffle 200 has a cross section that radiates in a zig-zag fashion.
Preferably, the sound horn 700 is further included, and the sound horn 700 is used for connecting the strong airflow sound source 300 and the cylinder 100, and improving the radiation efficiency of sound waves generated by the strong airflow sound source 300 to the inside of the cylinder 100.
When the embodiment is used, dust-containing flue gas enters from the upper end of the cylinder 100, passes through the smoke-permeable sound-blocking structure 400, enters into the annular standing wave tube unit 6008 formed by the space partition of the central partition plate 2, and flows along the axial direction of the standing wave tube unit 6008. The strong sound wave generated by the airflow strong sound source 300 firstly excites one standing wave tube unit 6008 along the transverse direction, then excites the other standing wave tube units 6008 along the circumferential direction in a reciprocating serial mode through a plurality of radiation ports on radial blades of the central partition plate 2, and a high-intensity standing wave sound field is generated inside the standing wave tube. The first radiation port on the acoustic wave propagation path is provided with an air-isolating and sound-transmitting structure 5 allowing strong acoustic waves to pass through. In each standing wave tube unit 6008, the sound field interacts with particles in the flue gas, and most of the fine particles form larger-sized agglomerates. The smoke containing the agglomerates passes through a smoke outlet sound blocking structure 7 positioned at the lower end of the acoustic wave agglomeration chamber 1, and the treated smoke is discharged from an outlet of the acoustic wave agglomeration chamber 1. Inside the sound wave agglomeration chamber 1, in the middle of the smoke-discharging sound-blocking structure 7, an exhaust cover plate 5206 is further arranged to prevent strong sound waves from leaking, and smoke which is not subjected to sound wave treatment is prevented from being directly discharged through a central pipeline of the sound wave agglomeration chamber.
In another aspect, the invention provides an emission abatement device comprising at least one sonic agglomeration chamber as described above. The emission reduction device is various emission reduction devices comprising an acoustic agglomeration chamber. For example, the emission reduction device comprises the acoustic wave aggregation chamber in any embodiment, a smoke buffer chamber communicated with the air inlet end of the acoustic wave aggregation chamber through a pipeline, and a dust removal device communicated with the air outlet end of the acoustic wave aggregation chamber through a pipeline. The dust removing device can be various common dust removing devices, such as a bag type dust remover. The dust removing device is also communicated with the absorption liquid or the chimney according to the requirement. Therefore, the acoustic agglomeration chamber is utilized to realize emission reduction of particulate matters in industrial flue gas. When a plurality of acoustic agglomeration chambers are used in the emission reduction device, the acoustic agglomeration chambers are connected in series through pipelines. The processing effect can be improved by increasing the number of the acoustic agglomeration chambers.
Preferably, the device comprises a plurality of acoustic wave aggregation chambers which are mutually connected in series. The treatment efficiency can be effectively improved.
It will be clear to a person skilled in the art that the scope of the present invention is not limited to the examples discussed in the foregoing, but that several variations and modifications are possible without deviating from the scope of the invention as defined in the attached claims. While the invention has been illustrated and described in detail in the drawings and the specification, such illustration and description are to be considered illustrative or exemplary only and not restrictive. The invention is not limited to the disclosed embodiments.
Variations to the disclosed embodiments can be understood and effected by those skilled in the art in practicing the claimed invention, from a study of the drawings, the disclosure, and the appended claims. In the claims, the term "comprising" does not exclude other steps or elements, and the indefinite article "a" or "an" does not exclude a plurality. The mere fact that certain measures are recited in mutually different dependent claims does not indicate that a combination of these measures cannot be used to advantage. Any reference signs in the claims shall not be construed as limiting the scope of the invention.

Claims (6)

1. An acoustic wave agglomeration chamber for PM2.5 particles in industrial flue gas is characterized by comprising a cylinder, a standing wave baffle plate and an airflow strong sound source for radiating sound waves into the cylinder,
two ends of the cylinder body are respectively provided with a smoke inlet and a smoke outlet, and two ends of the cylinder body are respectively provided with a smoke-permeable sound-blocking structure;
the standing wave baffle is inserted into the cylinder to divide the cylinder into a plurality of standing wave tube units which radiate outwards by taking the axis of the cylinder as a central line, and any two adjacent standing wave tube units are isolated from each other;
the air flow strong sound source is communicated with sound guide pipes which are used for isolating air generated by the air flow strong sound source and conducting sound waves to the standing wave pipe units; one end of the airflow strong sound source is connected with the sound guide pipe, and the other end of the airflow strong sound source is close to the smoke inlet; two ends of the sound guide pipe extend out of two ends of the cylinder respectively, and an exhaust cover plate is arranged at one end of the sound guide pipe, which is close to the smoke outlet;
the side wall of the sound guide pipe is provided with at least one air-isolation and sound-transmission part for conducting sound waves to each standing wave pipe unit; the axis of the sound guide tube is overlapped with the axis of the cylinder body and is arranged at the center of the cylinder body; a plurality of air-isolation and sound-transmission parts are arranged on the side wall of the sound guide pipe at intervals.
2. The acoustic wave agglomeration chamber of PM2.5 particles in industrial flue gas according to claim 1, further comprising an air guide cover for guiding the flue gas into the cylinder in a concentrated manner, wherein the air guide cover is respectively covered on the flue gas inlet and the flue gas outlet.
3. The acoustic wave aggregation chamber for PM2.5 particulate matters in industrial flue gas according to any one of claims 1 to 2, wherein the axial length of the standing wave tube unit is an integer multiple of half wavelength of the optimal frequency of acoustic wave aggregation of the particulate matters in the flue gas.
4. The acoustic wave aggregation chamber for PM2.5 particles in industrial flue gas according to any one of claims 1 to 2, wherein the cross-sectional area of the standing wave tube unit is four times the square of the air sound velocity divided by the square of the optimum frequency of acoustic wave aggregation for the particles in flue gas.
5. An acoustic wave emission reduction device for PM2.5 particles in industrial flue gas, which is characterized by comprising at least one acoustic wave agglomeration chamber for PM2.5 particles in industrial flue gas according to any one of claims 1 to 4.
6. The acoustic wave device for reducing PM2.5 particulate matter in industrial flue gas according to claim 5, comprising a plurality of acoustic wave agglomeration chambers for PM2.5 particulate matter in industrial flue gas connected in series.
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