CN114100861A - Acoustic wave soot blower for electrostatic dust collector and control method thereof - Google Patents
Acoustic wave soot blower for electrostatic dust collector and control method thereof Download PDFInfo
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- CN114100861A CN114100861A CN202111394724.5A CN202111394724A CN114100861A CN 114100861 A CN114100861 A CN 114100861A CN 202111394724 A CN202111394724 A CN 202111394724A CN 114100861 A CN114100861 A CN 114100861A
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- 239000000428 dust Substances 0.000 title claims abstract description 62
- 239000004071 soot Substances 0.000 title claims abstract description 20
- 238000000034 method Methods 0.000 title claims abstract description 14
- 230000005684 electric field Effects 0.000 claims abstract description 79
- 230000005540 biological transmission Effects 0.000 claims abstract description 13
- 238000001514 detection method Methods 0.000 claims abstract description 8
- 230000000694 effects Effects 0.000 claims abstract description 7
- 239000012717 electrostatic precipitator Substances 0.000 claims description 8
- 230000002035 prolonged effect Effects 0.000 claims description 3
- 239000007789 gas Substances 0.000 description 4
- 238000009434 installation Methods 0.000 description 3
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 206010020852 Hypertonia Diseases 0.000 description 1
- BIGPRXCJEDHCLP-UHFFFAOYSA-N ammonium bisulfate Chemical compound [NH4+].OS([O-])(=O)=O BIGPRXCJEDHCLP-UHFFFAOYSA-N 0.000 description 1
- 150000001450 anions Chemical class 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 150000001768 cations Chemical class 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000003546 flue gas Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C3/00—Separating dispersed particles from gases or vapour, e.g. air, by electrostatic effect
- B03C3/34—Constructional details or accessories or operation thereof
- B03C3/74—Cleaning the electrodes
- B03C3/80—Cleaning the electrodes by gas or solid particle blasting
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J3/00—Removing solid residues from passages or chambers beyond the fire, e.g. from flues by soot blowers
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- 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
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Abstract
The invention provides a sound wave soot blower for an electrostatic dust collector and a control method thereof, wherein the sound wave soot blower comprises a magnetic frequency modulation high-sound-intensity sound generator, a sound wave acoustic horn and a sound wave region control system; the sound transmission horns are uniformly arranged at the inlet of the dust removal chamber, and each sound transmission horn is connected with a magnetic frequency modulation high-sound strong sound generator; a plurality of stages of electric fields connected in series are arranged in the dust chamber, and at least one first sensor is arranged in each electric field; a second sensor is arranged in the electric field of the final stage and is used for detecting the sound pressure level intensity in the electric field of the final stage; the sound wave area control system is used for improving the dust removing effect and avoiding secondary dust raising by changing the power, the interval time delta t and the running time t of each magnetic frequency modulation high-sound-intensity sound wave generator according to the detection value of the first sensor and the detection value of the second sensor. The invention adopts multi-parameter feedback to control the frequency, the strength and the operation time of the acoustic wave soot blower, thereby avoiding secondary dust emission while ensuring the soot removing effect.
Description
Technical Field
The invention relates to the field of environmental protection dust removal or the field of dust removal in a dust removal chamber, in particular to an acoustic wave soot blower for an electrostatic dust collector and a control method thereof.
Background
The electrostatic dust collector of the thermal power plant ionizes the flue gas by using a high-voltage electric field, and the charged dust in the air flow is separated from the air flow under the action of the electric field. The process of trapping charged dust comprises the following steps: on the metal anode and cathode, an electric field is maintained by high-voltage direct current, which is enough to make the gas ionized, and the electrons generated after the gas is ionized: anions and cations, which adsorb on the dust passing through the electric field, charge the dust. Under the action of electric field force, the dust with different charged polarities moves to electrodes with different polarities respectively and deposits on the electrodes, so that the purpose of separating dust from gas is achieved.
After the electrostatic dust collector operates, dust is adhered to the dust collecting electrode and the corona electrode, and when the amount of the adhered dust reaches a certain degree, the corona electrode is prevented from generating corona, so that the dust collecting efficiency is reduced, and the electric dust collector cannot work normally.
At present, the electrostatic dust collector mostly adopts mechanical vibration to remove dust, but the vibration has the following problems:
(1) the rapping force is difficult to determine, the small rapping force easily causes the incomplete ash removal of the anode plate and the cathode wire, and the large rapping force easily causes the damage of the anode plate and the cathode wire.
(2) The rapping pattern is difficult to determine: mechanical rapping cycle is generally that a plurality of electric fields shake in proper order, along with unit load change, need reduce the interval for guaranteeing the dust collection efficiency of an electric field, lead to a plurality of electric field rappers to work simultaneously, cause the secondary raise dust to increase.
(3) Can not remove scales such as ammonium bisulfate and the like.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides the sound wave soot blower for the electrostatic dust collector and the control method thereof, and the frequency, the strength and the operation time of the sound wave soot blower are controlled by adopting multi-parameter feedback, so that the dust removing effect is ensured, and secondary dust raising is avoided.
The present invention achieves the above-described object by the following technical means.
A sound wave soot blower for an electrostatic precipitator comprises a magnetic frequency modulation high sound intensity sound generator, a sound wave acoustic transmission horn and a sound wave region control system; the sound transmission horns are uniformly arranged at the inlet of the dust removal chamber, and each sound transmission horn is connected with a magnetic frequency modulation high-sound strong sound generator; a plurality of stages of electric fields connected in series are arranged in the dust chamber, and at least one first sensor is arranged in each electric field and used for detecting corona voltage in the electric field; a second sensor is arranged in the electric field of the final stage and is used for detecting the sound pressure level intensity in the electric field of the final stage;
the sound wave area control system is used for improving the dust removing effect and avoiding secondary dust raising by changing the power, the interval time delta t and the running time t of each magnetic frequency modulation high-sound-intensity sound wave generator according to the detection value of the first sensor and the detection value of the second sensor.
Further, a corona voltage collecting system collects corona voltages in each electric field detected by the first sensor, and the corona voltage collecting system transmits the collected corona voltages in each electric field to the sound wave area control system.
A control method of a sound wave soot blower for an electrostatic dust collector comprises the following steps:
the dust removal chamber (5) is provided with N electric fields which are connected in series, and a second sensor is arranged in the Nth electric field to detect the sound pressure level intensity in the Nth electric field; setting the working frequency of the magnetic frequency modulation high-sound intensity sound generator to be f in the initial state0，f0340/L, wherein L is the distance from the acoustic wave transmission horn to the second sensor; setting the operating power P of the magnetic frequency modulation high-sound strong sound generator in the initial state0Running time t0And interval time deltat0；
The magnetic frequency modulation high-sound intensity sound generator has the running power P0Operating frequency f0Running time t0And interval time deltat0Working at the next time, when the sound pressure level intensity in the Nth electric field is 140-145 db, calculating and determining the standard average corona voltage U in the dust chamber through the first sensor0；
When U > 1.1U0And when the sound pressure level intensity in the Nth electric field does not exceed 159db, the sound wave area control system gradually increases the operating power of the magnetic frequency modulation high sound intensity sound wave generator, wherein U is the actual average corona voltage of the electric field in the dust removing chamber calculated by the sound wave area control system;
the magnetic toneIncreased running power and working frequency f of high-frequency sound intensity sound generator0Running time t0And interval time deltat0Working, when the intensity of the sound pressure level in the Nth electric field is 159-160 db, if U is more than 1.1U0When the system is used, the sound wave area control system gradually prolongs the running time of the magnetic frequency modulation high-sound-intensity sound wave generator;
the increased running power and working frequency f of the magnetic frequency modulation high-sound intensity sound generator0Extended running time and interval time deltat0Working, when the intensity of the sound pressure level in the Nth electric field is 159-160 db, if U is more than 1.1U0When the device is used, the sound wave area control system gradually shortens the interval time of the magnetic frequency modulation high-sound-intensity sound wave generator;
the increased running power and working frequency f of the magnetic frequency modulation high-sound intensity sound generator0And operating at extended operating time and shortened interval, when the sound pressure level intensity in the Nth electric field is 159-160 db, if U > 1.1U0The increased running power and working frequency f of the magnetic frequency modulation high-sound intensity sound generator0The operation is continued at the prolonged running time and the shortened interval until the U is less than 1.05U0。
Further, the step-by-step increase of the operating power of the magnetic frequency modulation high-sound-intensity sound generator by the sound wave area control system is specifically as follows:
when U > 1.1U0The sound wave area control system increases the running power of the magnetic frequency modulation high-sound-intensity sound wave generator to P1，P1＞P0Wherein U is the actual average corona voltage of the electric field in the dust removing chamber calculated by the sound wave area control system;
the magnetic frequency modulation high-sound intensity sound generator has the running power P1Operating frequency f0Running time t0And interval time deltat0Working at 1.1U when the intensity of the sound pressure level in the Nth electric field is 149-150 db0＞U＞1.05U0At running power P of the magnetic frequency modulation high-sound strong sound generator1Continuing to work; u is less than 1.05U0While, the acoustic wave zone control systemThe operating power of a magnetic frequency modulation high-sound intensity sound wave generator is adjusted to be P0(ii) a If U > 1.1U0The sound wave area control system increases the running power of the magnetic frequency modulation high-sound-intensity sound wave generator to P2；
The magnetic frequency modulation high-sound intensity sound generator has the running power P2Operating frequency f0Running time t0And interval time deltat0Working at 1.1U when the intensity of the sound pressure level in the Nth electric field is 154-155 db0＞U＞1.05U0At running power P of the magnetic frequency modulation high-sound strong sound generator2Continuing to work; u is less than 1.05U0The sound wave area control system adjusts the running power of the magnetic frequency modulation high-sound intensity sound wave generator to be P0(ii) a If U > 1.1U0The sound wave area control system increases the running power of the magnetic frequency modulation high-sound-intensity sound wave generator to P3；
The magnetic frequency modulation high-sound intensity sound generator has the running power P3Operating frequency f0Running time t0And interval time deltat0Working at 1.1U when the intensity of the sound pressure level in the Nth electric field is 159-160 db0＞U＞1.05U0At running power P of the magnetic frequency modulation high-sound strong sound generator3Continuing to work; u is less than 1.05U0The sound wave area control system adjusts the running power of the magnetic frequency modulation high-sound intensity sound wave generator to be P0(ii) a If U > 1.1U0The acoustic zone control system increases the operating time of the magnetic tone high intensity acoustic wave generator to P3。
Further, the step of gradually prolonging the operation time of the magnetic frequency modulation high-sound-intensity sound generator by the sound wave area control system specifically comprises the following steps:
the magnetic frequency modulation high-sound intensity sound generator has the running power P3Operating frequency f0Running time t0And interval time deltat0Working at 1.1U when the intensity of the sound pressure level in the Nth electric field is 159-160 db0＞U＞1.05U0At running power P of the magnetic frequency modulation high-sound strong sound generator3Continuing to work;if U is less than 1.05U0The sound wave area control system adjusts the running power of the magnetic frequency modulation high-sound intensity sound wave generator to be P0(ii) a If U > 1.1U0The sound wave area control system increases the running time of the magnetic frequency modulation high-sound intensity sound wave generator to 2t0；
The magnetic frequency modulation high-sound intensity sound generator has the running power P3Operating frequency f0Run time 2t0And interval time deltat0Working, when the sound pressure level intensity in the Nth electric field is 159-160 db, if U is less than 1.05U0The sound wave area control system adjusts the running power of the magnetic frequency modulation high-sound intensity sound wave generator to be P0The running time is adjusted to t0(ii) a If U > 1.1U0The sound wave area control system increases the running time of the magnetic frequency modulation high-sound intensity sound wave generator to 4t0；
The magnetic frequency modulation high-sound intensity sound generator has the running power P3Operating frequency f0Running time 4t0And interval time deltat0Working, when the sound pressure level intensity in the Nth electric field is 159-160 db, if U is less than 1.05U0The sound wave area control system adjusts the running power of the magnetic frequency modulation high-sound intensity sound wave generator to be P0The running time is adjusted to t0(ii) a If U > 1.1U0And the running time of the magnetic frequency modulation high-sound intensity sound wave generator is prolonged to 1min by the sound wave area control system.
The invention has the beneficial effects that:
1. the sound wave soot blower for the electrostatic dust collector and the control method thereof adopt multi-parameter feedback to control the frequency, the strength and the operation time of the sound wave soot blower, and avoid secondary dust raising while ensuring the dust removing effect.
2. According to the sound wave soot blower for the electrostatic dust collector and the control method thereof, the influence of the sound source installation position on the regional sound field control target is large in theory, and the requirement on the sound source installation position in practical application can be reduced by adopting the control method.
Drawings
FIG. 1 is a schematic view of the installation of a sonic soot blower for an electrostatic precipitator according to the present invention.
In the figure:
1-a sonic horn; 2-magnetic frequency modulation high sound intensity sound generator; 3-a sonic zone control system; 4-a gas source system; 5-a dust removal chamber; 6-corona voltage acquisition system; 7-a first sensor; 8-second sensor.
Detailed Description
The invention will be further described with reference to the following figures and specific examples, but the scope of the invention is not limited thereto.
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "axial," "radial," "vertical," "horizontal," "inner," "outer," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present invention and for simplicity in description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
As shown in fig. 1, the acoustic wave soot blower for an electrostatic precipitator of the present invention includes a magnetic frequency modulation high acoustic intensity acoustic wave generator 2, an acoustic wave acoustic transmission horn 1 and an acoustic wave zone control system 3; a plurality of sound transmission horns 1 are uniformly distributed at the inlet of a dust chamber 5, and each sound transmission horn 1 is connected with a magnetic frequency modulation high-sound strong sound generator 2; a plurality of stages of electric fields connected in series are arranged in the dust chamber 5, and at least one first sensor 7 is arranged in each electric field and used for detecting corona voltage in the electric field; a second sensor 8 is arranged in the electric field of the final stage and is used for detecting the sound pressure level intensity in the electric field of the final stage; the magnetic frequency modulation high-intensity sound generator 2 adopts a magnetic frequency modulation technology, the sound power is more than 30Kw, and the frequency adjustment range is 10 Hz-20 KHz. The air source system 4 is connected with the magnetic frequency modulation high-sound intensity sound generator 2.
The sound wave area control system 3 is used for improving the dust removing effect and avoiding secondary dust emission by synchronously changing the power, the interval time delta t and the running time t sent by each magnetic frequency modulation high-sound-intensity sound wave generator 2 according to the detection value of the first sensor 8 and the detection value of the second sensor 9. The corona voltage collecting system 6 collects corona voltages in each electric field detected by the first sensor 7, and the corona voltage collecting system 6 transmits the collected corona voltages in each electric field to the sonic zone control system 3.
The invention relates to a control method of a sound wave soot blower for an electrostatic dust collector, which comprises the following steps:
the dust removal chamber 5 is provided with N electric fields which are connected in series, and a second sensor 8 is arranged in the Nth electric field to detect the sound pressure level intensity in the Nth electric field; setting the working frequency of the magnetic frequency modulation high-sound intensity sound generator 2 in the initial state as f0，f0340/L, L is sound wave signalThe distance of the cartridge 1 from the second sensor 8; setting the operating power P of the magnetic frequency modulation high-sound intensity sound generator 2 in the initial state0Running time t0And interval time deltat0；
The magnetic frequency modulation high-sound intensity sound generator 2 has the running power P0Operating frequency f0Running time t0And interval time deltat0Working at the next time, and when the sound pressure level intensity in the Nth electric field is 140-145 db, calculating and determining the standard average corona voltage U in the dust chamber 5 through the first sensor 70(ii) a Running time t in the usual case0Is 10s, separated by a time delta t0It is 10 min.
When U > 1.1U0Then, the sound wave area control system 3 increases the running power of the magnetic frequency modulation high-sound intensity sound wave generator 2 to P1，P1＞P0Wherein U is the actual average corona voltage of the electric field in the dust removal chamber 5 calculated by the sound wave region control system;
the magnetic frequency modulation high-sound intensity sound generator 2 has the running power P1Operating frequency f0Running time t0And interval time deltat0Working at 1.1U when the intensity of the sound pressure level in the Nth electric field is 149-150 db0＞U＞1.05U0At the running power P of the magnetic frequency modulation high-sound intensity sound generator 21Continuing to work; u is less than 1.05U0The sound wave area control system 3 adjusts the running power of the magnetic frequency modulation high-sound intensity sound wave generator 2 to be P0(ii) a If U > 1.1U0Then, the sound wave area control system 3 increases the running power of the magnetic frequency modulation high-sound intensity sound wave generator 2 to P2；
The magnetic frequency modulation high-sound intensity sound generator 2 has the running power P2Operating frequency f0Running time t0And interval time deltat0Working at 1.1U when the intensity of the sound pressure level in the Nth electric field is 154-155 db0＞U＞1.05U0At the running power P of the magnetic frequency modulation high-sound intensity sound generator 22Continuing to work; if U is less than 1.05U0The sound wave area control system 3 generates magnetic frequency modulation high sound intensity sound waveThe operating power of the machine 2 is adjusted to P0(ii) a If U > 1.1U0Then, the sound wave area control system 3 increases the running power of the magnetic frequency modulation high-sound intensity sound wave generator 2 to P3；
The magnetic frequency modulation high-sound intensity sound generator 2 has the running power P3Operating frequency f0Running time t0And interval time deltat0Working at 1.1U when the intensity of the sound pressure level in the Nth electric field is 159-160 db0＞U＞1.05U0At the running power P of the magnetic frequency modulation high-sound intensity sound generator 23Continuing to work; if U is less than 1.05U0The sound wave area control system 3 adjusts the running power of the magnetic frequency modulation high-sound intensity sound wave generator 2 to be P0(ii) a If U > 1.1U0The sound wave area control system 3 increases the running time of the magnetic frequency modulation high-sound intensity sound wave generator 2 to 2t0；
The magnetic frequency modulation high-sound intensity sound generator 2 has the running power P3Operating frequency f0Run time 2t0And interval time deltat0Working, when the sound pressure level intensity in the Nth electric field is 159-160 db, if U is less than 1.05U0The sound wave area control system 3 adjusts the running power of the magnetic frequency modulation high-sound intensity sound wave generator 2 to be P0The running time is adjusted to t0(ii) a If U > 1.1U0The sound wave area control system 3 increases the running time of the magnetic frequency modulation high-sound strong sound wave generator 2 to 4t0；
The magnetic frequency modulation high-sound intensity sound generator 2 has the running power P3Operating frequency f0Running time 4t0And interval time deltat0Working, when the sound pressure level intensity in the Nth electric field is 159-160 db, if U is less than 1.05U0The sound wave area control system 3 adjusts the running power of the magnetic frequency modulation high-sound intensity sound wave generator 2 to be P0The running time is adjusted to t0(ii) a If U > 1.1U0Then, the sound wave area control system 3 increases the running time of the magnetic frequency modulation high sound intensity sound wave generator 2 to 1 min;
the magnetic frequency modulation high-sound intensity sound generator 2At operating power P3Operating frequency f0Running time 1min and interval time Δ t0Working, when the sound pressure level intensity in the Nth electric field is 159-160 db, if U is less than 1.05U0The sound wave area control system 3 adjusts the running power of the magnetic frequency modulation high-sound intensity sound wave generator 2 to be P0The running time is adjusted to t0(ii) a If U > 1.1U0Meanwhile, the sound wave area control system 3 shortens the interval time of the magnetic frequency modulation high-sound-intensity sound wave generator 2 to 8 min;
the magnetic frequency modulation high-sound intensity sound generator 2 has the running power P3Operating frequency f0The operation time is 1min, the interval time is 8min, and when the sound pressure level intensity in the Nth electric field is 159-160 db, if U is less than 1.05U0The sound wave area control system 3 adjusts the running power of the magnetic frequency modulation high-sound intensity sound wave generator 2 to be P0The running time is adjusted to t0And interval time deltat0(ii) a If U > 1.1U0Meanwhile, the sound wave area control system 3 shortens the interval time of the magnetic frequency modulation high-sound-intensity sound wave generator 2 to 4 min;
the magnetic frequency modulation high-sound intensity sound generator 2 has the running power P3Operating frequency f0The operation time is 1min, the interval time is 4min, and when the sound pressure level intensity in the Nth electric field is 159-160 db, if U is less than 1.05U0The sound wave area control system 3 adjusts the running power of the magnetic frequency modulation high-sound intensity sound wave generator 2 to be P0The running time is adjusted to t0And interval time deltat0(ii) a If U > 1.1U0Meanwhile, the sound wave area control system 3 shortens the interval time of the magnetic frequency modulation high-sound-intensity sound wave generator 2 to 2 min;
the magnetic frequency modulation high-sound intensity sound generator 2 has the running power P3Operating frequency f0The operation time is 1min, the interval time is 2min, and when the sound pressure level intensity in the Nth electric field is 159-160 db, if U is less than 1.05U0The sound wave area control system 3 adjusts the running power of the magnetic frequency modulation high-sound intensity sound wave generator 2 to be P0The running time is adjusted to t0And interval time deltat0(ii) a If U > 1.1U0The magnetic frequency modulation high-sound intensity sound generator 2 operates at the power P3Operating frequency f0The operation time is 1min and the interval time is 2min, and the operation is continued until U is less than 1.05U0。
It should be understood that although the present description has been described in terms of various embodiments, not every embodiment includes only a single embodiment, and such description is for clarity purposes only, and those skilled in the art will recognize that the embodiments described herein may be combined as suitable to form other embodiments, as will be appreciated by those skilled in the art.
The above-listed detailed description is only a specific description of a possible embodiment of the present invention, and they are not intended to limit the scope of the present invention, and equivalent embodiments or modifications made without departing from the technical spirit of the present invention should be included in the scope of the present invention.
Claims (5)
1. A sound wave soot blower for an electrostatic precipitator is characterized by comprising a magnetic frequency modulation high sound intensity sound generator (2), a sound wave transmission horn (1) and a sound wave region control system (3); the sound transmission horns (1) are uniformly arranged at the inlet of the dust removal chamber (5), and each sound transmission horn (1) is connected with a magnetic frequency modulation high-sound strong sound generator (2); a plurality of stages of electric fields connected in series are arranged in the dust chamber (5), and at least one first sensor (7) is arranged in each electric field and used for detecting corona voltage in the electric field; a second sensor (8) is arranged in the electric field of the final stage and is used for detecting the sound pressure level intensity in the electric field of the final stage;
the sound wave area control system (3) is used for improving the dust removing effect and avoiding secondary dust raising by changing the power, the interval time delta t and the running time t of each magnetic frequency modulation high-sound-intensity sound wave generator (2) according to the detection value of the first sensor (8) and the detection value of the second sensor (9).
2. The acoustic sootblower for electrostatic precipitators according to claim 1, wherein a corona voltage collecting system (6) collects corona voltages in each electric field detected by said first sensor (7), said corona voltage collecting system (6) feeding the collected corona voltages in each electric field to the acoustic zone control system (3).
3. A method for controlling a sonic sootblower for an electrostatic precipitator in accordance with claim 1, comprising the steps of:
the dust removal chamber (5) is provided with N electric fields which are connected in series, and a second sensor (8) is arranged in the Nth electric field to detect the sound pressure level intensity in the Nth electric field; setting the working frequency of the magnetic frequency modulation high-sound intensity sound generator (2) in the initial state as f0，f0340/L, wherein L is the distance from the acoustic transmission horn (1) to the second sensor (8); setting the operating power P of the magnetic frequency modulation high-sound intensity sound generator (2) in the initial state0Running time t0And interval time deltat0；
The magnetic frequency modulation high-sound intensity sound generator (2) has the running power P0Operating frequency f0Running time t0And interval time deltat0Working at the lower part, and when the sound pressure level intensity in the Nth electric field is 140-145 db, calculating and determining the standard average corona voltage U in the dust removing chamber (5) through the first sensor (7)0；
When U > 1.1U0And when the sound pressure level intensity in the Nth electric field does not exceed 159db, the sound wave area control system (3) gradually increases the operating power of the magnetic frequency modulation high sound intensity sound wave generator (2), wherein U is the actual average corona voltage of the electric field in the dust removal chamber (5) calculated by the sound wave area control system;
the increased running power and working frequency f of the magnetic frequency modulation high-sound intensity sound generator (2)0Running time t0And interval time deltat0Working, when the intensity of the sound pressure level in the Nth electric field is 159-160 db, if U is more than 1.1U0When the device is used, the sound wave area control system (3) gradually prolongs the running time of the magnetic frequency modulation high-sound-intensity sound wave generator (2);
the increased running power and working frequency of the magnetic frequency modulation high-sound intensity sound generator (2)f0Extended running time and interval time deltat0Working, when the intensity of the sound pressure level in the Nth electric field is 159-160 db, if U is more than 1.1U0When the device is used, the sound wave area control system (3) gradually shortens the interval time of the magnetic frequency modulation high-sound-intensity sound wave generator (2);
the increased running power and working frequency f of the magnetic frequency modulation high-sound intensity sound generator (2)0And operating at extended operating time and shortened interval, when the sound pressure level intensity in the Nth electric field is 159-160 db, if U > 1.1U0The increased running power and working frequency f of the magnetic frequency modulation high-sound intensity sound generator (2) are used0The operation is continued at the prolonged running time and the shortened interval until the U is less than 1.05U0。
4. The method for controlling the acoustic wave soot blower for the electrostatic precipitator according to claim 3, wherein the step-by-step increase of the operating power of the magnetic frequency modulation high-intensity acoustic wave generator (2) by the acoustic wave zone control system (3) is specifically as follows:
when U > 1.1U0The sound wave area control system (3) increases the operating power of the magnetic frequency modulation high-sound-intensity sound wave generator (2) to P1，P1＞P0Wherein U is the actual average corona voltage of the electric field in the dust removing chamber (5) calculated by the sound wave region control system;
the magnetic frequency modulation high-sound intensity sound generator (2) has the running power P1Operating frequency f0Running time t0And interval time deltat0Working at 1.1U when the intensity of the sound pressure level in the Nth electric field is 149-150 db0＞U＞1.05U0When the magnetic frequency modulation high-sound intensity sound generator (2) is in operation power P1Continuing to work; u is less than 1.05U0The sound wave area control system (3) adjusts the running power of the magnetic frequency modulation high-sound-intensity sound wave generator (2) to be P0(ii) a If U > 1.1U0The sound wave area control system (3) increases the operating power of the magnetic frequency modulation high-sound-intensity sound wave generator (2) to P2；
The magnetic frequency modulation high soundOperating power P of strong sound generator (2)2Operating frequency f0Running time t0And interval time deltat0Working at 1.1U when the intensity of the sound pressure level in the Nth electric field is 154-155 db0＞U＞1.05U0When the magnetic frequency modulation high-sound intensity sound generator (2) is in operation power P2Continuing to work; u is less than 1.05U0The sound wave area control system (3) adjusts the running power of the magnetic frequency modulation high-sound-intensity sound wave generator (2) to be P0(ii) a If U > 1.1U0The sound wave area control system (3) increases the operating power of the magnetic frequency modulation high-sound-intensity sound wave generator (2) to P3；
The magnetic frequency modulation high-sound intensity sound generator (2) has the running power P3Operating frequency f0Running time t0And interval time deltat0Working at 1.1U when the intensity of the sound pressure level in the Nth electric field is 159-160 db0＞U＞1.05U0When the magnetic frequency modulation high-sound intensity sound generator (2) is in operation power P3Continuing to work; u is less than 1.05U0The sound wave area control system (3) adjusts the running power of the magnetic frequency modulation high-sound-intensity sound wave generator (2) to be P0(ii) a If U > 1.1U0The sound wave area control system (3) increases the running time of the magnetic frequency modulation high-sound intensity sound wave generator (2) to P3。
5. The method for controlling the acoustic wave soot blower for the electrostatic precipitator according to claim 4, wherein the step of gradually prolonging the operation time of the magnetic frequency modulation high-intensity acoustic wave generator (2) by the acoustic wave zone control system (3) comprises:
the magnetic frequency modulation high-sound intensity sound generator (2) has the running power P3Operating frequency f0Running time t0And interval time deltat0Working at 1.1U when the intensity of the sound pressure level in the Nth electric field is 159-160 db0＞U＞1.05U0When the magnetic frequency modulation high-sound intensity sound generator (2) is in operation power P3Continuing to work; if U is less than 1.05U0The sound wave area control system (3) adjusts the magnetic frequency and the high sound intensity sound waveThe operating power of the generator (2) is adjusted to P0(ii) a If U > 1.1U0The sound wave area control system (3) increases the running time of the magnetic frequency modulation high-sound intensity sound wave generator (2) to 2t0；
The magnetic frequency modulation high-sound intensity sound generator (2) has the running power P3Operating frequency f0Run time 2t0And interval time deltat0Working, when the sound pressure level intensity in the Nth electric field is 159-160 db, if U is less than 1.05U0The sound wave area control system (3) adjusts the running power of the magnetic frequency modulation high-sound-intensity sound wave generator (2) to be P0The running time is adjusted to t0(ii) a If U > 1.1U0The sound wave area control system (3) increases the running time of the magnetic frequency modulation high-sound intensity sound wave generator (2) to 4t0；
The magnetic frequency modulation high-sound intensity sound generator (2) has the running power P3Operating frequency f0Running time 4t0And interval time deltat0Working, when the sound pressure level intensity in the Nth electric field is 159-160 db, if U is less than 1.05U0The sound wave area control system (3) adjusts the running power of the magnetic frequency modulation high-sound-intensity sound wave generator (2) to be P0The running time is adjusted to t0(ii) a If U > 1.1U0And the sound wave area control system (3) improves the running time of the magnetic frequency modulation high-sound-intensity sound wave generator (2) to 1 min.
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