CN103877824B - Based on the Combustion Energy origin system fine particle emission reduction device of acoustic agglomerator principle - Google Patents
Based on the Combustion Energy origin system fine particle emission reduction device of acoustic agglomerator principle Download PDFInfo
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Abstract
The present invention devises a set of device realizing fine particle acoustic agglomerator reduction of discharging in Combustion Energy origin system large discharge flue gas.It is made up of high pressure draught source, high pressure mixing chamber, air-flow sound source, horn, coupling cabin, cohesion cabin, expansion tank, removable end face, conventional dust removal device, data sensor control assembly, central Measurement &control computer and noise elimination, sound proof member etc.This device makes full use of the principle that acoustic agglomerator efficiency sharply raises with sound pressure level increase, by three kinds of high-power air-flow sound sources and varying-arca channel supporting, introduce the gentle sound separating component of grille structure, fine particle is made in large scale cohesion cabin, to be subject to the effect of high strength and low harmony wave component plane standing-wave sound field and to reunite rapidly, rely on the unified adjustment of Measurement &control computer and optimizing operation parameter, realize strong sound wave from producing to the optimum transfer efficiency that acts on and adapting to the change of fine particle characteristic, whole implementation is in emission reduction efficiency, economy, applicability, the aspects such as pollution-free and extensibility have advantage.
Description
Technical field
The present invention relates to and a kind ofly remove particle diameter in burning emit energy system flue gas and be less than the emission reduction device of the fine particle (hereinafter referred to as PM2.5) of 2.5 microns, in particular to a kind of fine particle emission reduction device based on acoustic agglomerator principle, belong to the technical field that pollution control equipment manufactures.
Background technology
Along with the consumption of fast development to the energy of China's economy is increasing, increasing to the pollutant in air by chemical combustion emit energy system.In recent years, according to the environmental monitoring data of each big and medium-sized cities, PM2.5 severe overweight situation happens occasionally, and city haze weather occurs on a large scale repeatedly.These all show, the fine particle based on PM2.5 has become the major pollutants of China's city atmospheric environment.PM2.5 refers to that gas-kinetic diameter is less than the suspension fine grained of 2.5 microns, it is rich in noxious material and atmospheric residence time is long, fed distance is far away, not only reduce atmospheric visibility, affect traffic, natural environment and climate, and have the serious harm of short-term and long-term accumulated to health.Development Combustion Energy origin system novel dust removing emission-reduction technology becomes the key fundamentally addressed this problem.
Existing dust-removal emission reduction technology is as all very low to the elimination efficiency of less than 5 microns particles in electrostatic precipitator, cyclone dust collectors, sack cleaner and wet scrubber etc., or have that financial cost is high, narrow application range, process flow are limited or affect the problems such as energy system operation because of transformation, fully cannot meet the demand that PM2.5 reduces discharging control.Emission-reduction technology based on acoustic agglomerator principle is the good approach of generally acknowledging at present.Within a short period of time, through high strength sound wave effect, makes the following fine grained of micron in flue gas mutually collide, and then adheres to and form the aggregate of more than some microns, is then removed by aggregate by conventional dust removal equipment.Acoustic agglomerator dustproof function time short, Be very effective, economical easy-to-use and high temperature, high pressure and corrosive atmosphere can be adapted to, will play a significant role in China's present stage air pollution treatment.
Current domestic available technical grade acoustic agglomerator emission-reducing system is also more rare.Great majority reduce discharging undersized principle confirmatory experiment in laboratory.The semi-industrial scale power that system produces that openly power is the highest only has 1600W(RodriguezJJ, etal.Acousticagglomerationforelectrostaticretentionoffly-ashesatpilotscale:influenceofintensityofsoundfieldatdiff erentconditions.Journalofaerosolscience, 1996,21:621-622), sound field intensity is not high, emission reduction effect and scale limited.Except the reason such as flue gas type in the complexity of suspended particulate acoustic agglomerator problem itself and reality, Size Distribution be changeable, technical grade emission-reducing system needs support that is high-power, high sound ambient, need to consider efficiency of dust collection, economy, stability and Noise measarement problem, be embodied in design realization and technical scheme that strong sound produced, condensed cabin structure, sound field indicators and the aspect such as the system integration, Monitoring and Controlling.
Summary of the invention
Technical problem to be solved by this invention is: the deficiency existed for prior art, utilizes fine particle emission reduction device in acoustic agglomerator principle design a set of Combustion Energy origin system flue gas.This device makes full use of the principle that acoustic agglomerator efficiency sharply raises with sound pressure level increase, by three kinds of high-power air-flow sound sources and varying-arca channel supporting, and rely on unified Measurement &control computer to regulate and optimizing operation parameter.Whole implementation has advantage in emission reduction efficiency, economy, applicability, pollution-free and extensibility.
Emission reduction device of the present invention comprises as lower component:
A kind of Combustion Energy origin system fine particle emission reduction device based on acoustic agglomerator principle, it is characterized in that comprising with lower component: the high pressure draught source of supply high pressure draught, the high pressure mixing chamber of stable high voltage air-flow, it is the air-flow sound source of signal specific strong sound wave by high pressure draught power conversion, an adpting flange, by the horn that air-flow sound source radiative acoustic wave energy is carried to downstream line, for realizing coupling cabin uiform section section and the coupling cabin contraction section of strong acoustic resonance synthesis, discharge the high pressure draught exhaust outlet having utilized complete high pressure draught in coupling cabin, hold flue gas and make it be subject to the cohesion cabin of strong sound wave effect, No. two adpting flanges, realize the entrant sound plate that high pressure draught is separated with strong sound wave, the grille structure keeping plane standing-wave condition in cohesion cabin is made under large flue gas flow condition, input Combustion Energy origin system produce the smoke air inlet of flue gas and discharge the flue gas exhaust mouth of the rear flue gas of cohesion, for expansion tank and the removable end face of auxiliary adjustment cohesion cabin acoustic resonance frequencies, adjusting screw(rod), screw action mechanism, No. three adpting flanges, No. four adpting flanges, expansion tank sealing plate, for removing the conventional dust removal device of Large stone aggregate,
The gas outlet in high pressure draught source is connected with the inlet seal of high pressure mixing chamber, the outlet of high pressure mixing chamber is connected with the inlet seal of each air-flow sound source respectively by the pipeline of a point three, the outlet of each air-flow sound source is connected with the inlet seal of horn by an adpting flange, horn outlet is tightly connected with the one end of the cabin uiform section section that is coupled, one end that the other end of coupling cabin uiform section section is larger with the contraction section cross section, cabin that is coupled is tightly connected, less one end, coupling contraction section cross section, cabin is tightly connected by No. two adpting flanges and cohesion one end, cabin, between No. two adpting flanges, entrant sound plate is installed, the cohesion cabin other end is tightly connected by No. three adpting flanges and expansion tank, cohesion cabin is provided with smoke air inlet near the top of No. two adpting flange one end, flue gas exhaust mouth is provided with near the bottom of No. three adpting flange one end, cohesion is provided with grille structure in cabin, described grille structure is between smoke air inlet and flue gas exhaust mouth, removable end face is installed in expansion tank, this removable end face is connected with screw action mechanism by adjusting screw(rod), screw action mechanism is connected with central Measurement &control computer by cable, move left and right in expansion tank for controlling removable end face, in order to regulate the acoustic resonance frequencies in cohesion cabin and expansion tank, expansion tank is by being arranged on the expansion tank sealing plate sealing on No. four adpting flanges, described adjusting screw(rod) is connected with screw action mechanism through expansion tank sealing plate central opening, flue gas exhaust mouth is connected with conventional dust removal device by connecting pipe, pending flue gas flows into through smoke air inlet, discharged after conventional deduster process by flue gas exhaust mouth,
Also comprise air chamber pressure sensor, a flow sensor, No. two flow sensors, a microphone, No. two microphones, humidity temperature pickup, a sampling and particle diameter spectrometer, No. two samplings and particle diameter spectrometer, wherein air chamber pressure sensor is positioned at high pressure mixing chamber, a flow sensor is arranged on high pressure mixing chamber exit, be respectively used to pressure and the flow of measuring the high pressure draught that high pressure draught source produces, a microphone is positioned at coupling cabin uiform section section, for the acoustic pressure in the uiform section section of measuring coupling cabin, a sampling and particle diameter spectrometer, No. two flow sensors and humidity temperature pickup are positioned at the pipeline carrying Combustion Energy origin system to produce flue gas, are respectively used to measure input flue gas concentration, domain size distribution, flow, temperature and humidity, No. two microphones are positioned at cohesion cabin, for measuring the acoustic pressure in cohesion cabin, No. two samplings are positioned at particle diameter spectrometer and are connected flue gas exhaust mouth and conventional dust removal organ pipe road, export flue gas concentration and domain size distribution for measuring, above-mentioned data sensor equipment is all connected with central Measurement &control computer by data wire.
Preferably, described high pressure draught source is air compressor or high-pressure air feed source, and available air-flow power is not less than 5 myriawatts.
Preferably, described air-flow sound source is high pressure siren, the strong acoustic generator of resonant mode or modulation air-flow sound source; Described high pressure siren is controlled by the motor drive controller be connected with central Measurement &control computer by cable, the strong acoustic generator of described resonant mode is controlled by the servo mechanism controller be connected with central Measurement &control computer by cable, and described modulation air-flow sound source is by any wave generator be connected with central Measurement &control computer by cable and power amplifier control.
Preferably, described conventional dust removal device is electrostatic precipitator, sack cleaner or cyclone dust collectors.
Preferably, described emission reduction device also comprises the ultrasonic atomizer that can produce cleaning additive and in order to realize pending flue gas and the well-mixed smog hybrid chamber of this cleaning additive; Described smog hybrid chamber is arranged on the admission line that is connected with smoke air inlet, described ultrasonic atomizer is connected on the smoke inlet pipe road of conveying Combustion Energy origin system by pipeline, and now humidity temperature pickup is in the pipeline for connecting between ultrasonic atomizer and smog hybrid chamber.
Preferably, described emission reduction device also comprises the silencer being installed on high pressure draught exhaust outlet, smoke air inlet and flue gas exhaust mouth respectively, No. two silencers and No. three silencers, be installed on the sound insulating layer of horn, coupling cabin uiform section section, coupling cabin contraction section, cohesion cabin and expansion tank outer wall, and at the sound absorption environment of whole emission reduction device peripheral disposition.
Preferably, described emission reduction device also comprises and is installed on the optical window of cohesion bottom, cabin wall near flue gas exhaust mouth position and offside, light source and the illumination photometer of optical window outside are also fixed in upper and lower both sides, cohesion cabin, office, described illumination photometer is connected with central Measurement &control computer by data wire, realizes auxiliary monitoring suspension fine particle state of aggregation by measuring flue gas visibility.
Preferably, the horn of described emission reduction device, coupling cabin uiform section section, coupling cabin contraction section, cohesion cabin and expansion tank wall thickness in 0.01m to 0.05m scope, the preferred cast iron of wall, the metal material that carbon steel or stainless steel isodensity is larger; Entrant sound plate is a solid sheet, and its thickness is in 0.002m to 0.004m scope, and its area is not less than cohesion cabin sectional area S
2, the light metal materials such as the preferred aluminium of entrant sound plate material, titanium.
Combustion Energy origin system fine particle emission reduction device based on acoustic agglomerator principle of the present invention, its specific works process is as follows:
(1) first measurement by a sampling and particle diameter spectrometer inputs flue gas concentration and particle size distribution data, input flue gas flow data are measured by No. two flow sensors, input flue-gas temperature and humidity data is measured by humidity temperature pickup, and transfer to central Measurement &control computer by measuring the data obtained, the optimum operating condition (comprising sound pressure level, frequency and acoustical signal) that central Measurement &control computer is run by this emission reduction device of acoustic agglomerator Model and experiment database automatic Prediction run thereon;
(2) emission reduction device comprises three kinds of high-power air-flow sound sources, is high pressure siren, the strong acoustic generator of resonant mode and modulation air-flow sound source respectively.According to step (1) measurement result, judge the airflow noise Source Type that should adopt by central Measurement &control computer and provide pressure, the data on flows in control data and high pressure draught source: if be chosen as high pressure siren, the outlet of high pressure siren is connected with horn, control motor drive controller by central Measurement &control computer and send control signal to high pressure siren, start high pressure siren; If be chosen as resonance generator, resonance generator outlet is connected with horn, controls servo mechanism controller by central Measurement &control computer and regulate the strong acoustic generator geometric parameter of resonant mode, start resonance generator; If be chosen as modulation air-flow sound source, will modulate the outlet of air-flow sound source and be connected with horn, and controlling any wave generator and power amplifier provides the corresponding electric signal after amplification to modulating air-flow sound source by central Measurement &control computer, air-flow sound source is modulated in startup;
(3) start high pressure draught source, the high pressure draught produced in high pressure draught source inputs corresponding air flow sound source after sending into high pressure mixing chamber current stabilization by gas pipeline;
(4) high pressure draught Conversion of Energy is the strong sound wave of specific waveforms by air-flow sound source, the pressure that refer step (2) provides and data on flows, according to the data that air chamber pressure sensor and a flow sensor provide, regulate high pressure draught source, with step (1), the acoustical signal that No. two microphones are measured predicts that operating mode is consistent;
(5) through air-flow sound source transform after strong sound wave by horn to coupling cabin in radiative acoustic wave energy, utilize complete air-flow to discharge via the exhaust outlet being arranged on coupling top, cabin, strong sound wave enters cohesion cabin through entrant sound plate and form the strong sound field of plane standing wave in cohesion cabin;
(6) regulate cohesion cabin end face vertically by screw action mechanism, until No. two microphones and a microphone to survey the difference of sound pressure level maximum, sound field reaches resonance state;
(7) by the flue gas of smoke air inlet input Combustion Energy origin system generation, after flue gas enters cohesion cabin, in cohesion cabin, carry out pretreatment with strong sound wave, expect until No. two samplings survey satisfied reduction of discharging of flue gas particles domain size distribution with particle diameter spectrometer;
(8) after flue gas exhaust mouth exports, flow through conventional dust removal devices through the pretreated flue gas of strong sound wave to be for further processing, complete the removing of Large stone aggregate.
In order to obtain better dust removing effects, also following steps can be added: start ultrasonic atomizer and input fog in smog hybrid chamber in described step (7), after the flue gas that Combustion Energy origin system produces fully mixes with fog in smog hybrid chamber, flow into cohesion cabin through smoke air inlet.
The present invention utilize the frequency range of strong sound wave for 800Hz to 5000Hz, use power for air-flow sound source more than myriawatt magnitude, single-frequency or the strong acoustical signal of combination frequency can be produced in this frequency range.Signal sound is arbitrarily downgraded and is not less than 155dB.Horn minimum cutoff is not higher than 300Hz.
In this emission reduction device, the cross section of each air-flow and strong sound passage (comprising horn, coupling cabin uiform section section, coupling cabin contraction section, cohesion cabin and expansion tank) is square, its concrete size (as shown in Figure 3) can be determined according to flue gas flow rate U and strong sound wave sound pressure level SPL, action time T in known pending maximum flue gas volume flow Q, cohesion cabin, and detailed process is as follows:
Cohesion cabin sectional area S
2for Q/Um
2, cohesion cabin length L
2be not less than T*Um.And then obtain sound power of a source W and air-flow power W
0:
W
0=W/η(2)
Wherein η is the conversion efficiency of air-flow sound source.The discharge area S of air-flow sound source
0:
S
0=W/10
7(3)
The sectional area S of coupling cabin uiform section section
1for cohesion cabin sectional area S
24 to 16 times.The length L of coupling cabin uiform section section
1be not less than the wavelength that this emission reduction device operating frequency lower limit (i.e. 800Hz) is corresponding:
L
1≥c
0/800(4)
Wherein c
0for THE VELOCITY OF SOUND IN AIR, be 340m/s.
Coupling cabin contraction section profile is positive truncated rectangular pyramids.The length L of coupling cabin contraction section
3(wherein θ
1angle for be coupled contraction section side, cabin and axis):
Horn profile comprises four walls, and wherein two, upper and lower wall is straight flange, and another two walls are curved side, and curved side shape line can be straight line, hyperbola or exponential line; The discharge area S of horn inlet area and air-flow sound source
0identical, horn discharge area and the cabin uiform section section area S that is coupled
1identical.The length L of horn
0(wherein θ
2angle for horn side and axis):
Cohesion is provided with groined type grille structure to keep meeting plane standing-wave condition in cabin in cabin, and wherein grille structure each unit on the cross section of looking along cohesion cabin axis is square, its each unit length of side L
4be not more than c
0/ (2f), f are emission reduction device operating frequency.
Expansion tank sectional area S
3equal to condense cabin sectional area S
2, expansion tank length L
5be not less than the half of this emission reduction device operating frequency lower limit (i.e. 800Hz) corresponding wavelength.
The wall thickness of each air-flow of this emission reduction device and strong sound passage (comprising horn, coupling cabin uiform section section, coupling cabin contraction section, cohesion cabin and expansion tank) is in 0.01m to 0.05m scope, to avoid pipe vibration on the impact of coacervation process, the preferred cast iron of wall, the metal material that carbon steel or stainless steel isodensity is larger.Entrant sound plate is a solid sheet, and its thickness is in 0.002m to 0.004m scope, and its area is not less than cohesion cabin sectional area S
2.The light metal materials such as the preferred aluminium of entrant sound plate material, titanium.
The heavyweight acoustic agglomerator emission reduction device adopting the present invention to propose, has following beneficial effect:
(1) be greater than more than 3kg/s(air-flow power 5 myriawatt by more than gauge pressure 2atm, flow) high pressure draught drive high-power air-flow sound source, produce the acoustical power of more than 1 myriawatt, with realize technical grade large discharge flue gas acoustic agglomerator reduce discharging.
(2) the air-flow sound source of three kinds of different qualities is adopted to produce the high power strong sound wave of unlike signal feature, to adapt to the fine grained characteristic of dissimilar flue gas; The design combined with varying-arca channel by high-power air-flow sound source is realized strong acoustic resonance and synthesizes, and concentrates sound pressure level higher than 160dB and the lower strong sound field of harmonic ratio, significantly strengthen acoustic agglomerator emission reduction efficiency and shorten the reduction of discharging time in large scale cohesion cabin.
(3) the composite cabin body design in sound field zigzag tread patterns gradual change cross section is adopted, acoustics rate is consistent frequently to make emission reduction device operating frequency and cabin resonance body by dynamic adjustments duct length, realize strong sound wave from sound source to the optimum transfer efficiency in cohesion cabin, strengthen the capacity usage ratio of dust-removal emission reduction.
(4) adopt gas sound separating thought, avoid high pressure draught to the adverse effect of suspended particulate acoustic agglomerator process, and do not affecting under strong sound field characteristic prerequisite, realize the cohesion cabin design of relative compact.
(5) adopt square constant section duct, the physical dimension of each air-flow and strong sound passage (comprising horn, coupling cabin uiform section section, coupling cabin contraction section, cohesion cabin and expansion tank) adjusts flexibly according to described method for designing; Emission reduction device can laterally walk abreast or longitudinal Serial Extension as single reduction of discharging module, meets the demand of different capacity magnitude and pending flue gas flow energy resource system.
(6) emission reduction device is at each air inlet, blast pipe series connection silencer, and each pipeline outer wall installs sound insulation and absorbent treatment additional, avoids high intensity noise on the impact of environment.
(7) emission reduction device comprise flow, air pressure, acoustic pressure, particle concentration and domain size distribution, optics visibility, temperature, humidity sensing data passage and air-flow sound source, condense cabin state modulator passage, rely on unified central Measurement &control computer real-time dynamic monitoring emission reduction effect, optimizing operation parameter, strengthens emission reduction device to the applicability of dissimilar flue gas.
Accompanying drawing explanation
Fig. 1 is the Combustion Energy origin system fine particle emission reduction device structure composition diagram based on acoustic agglomerator principle of the present invention;
Fig. 2 is the Combustion Energy origin system fine particle emission reduction device observing and controlling graph of a relation based on acoustic agglomerator principle of the present invention;
Fig. 3 is the Combustion Energy origin system fine particle emission reduction device body passageways physical dimension schematic diagram based on acoustic agglomerator principle of the present invention;
Fig. 4 is the Combustion Energy origin system fine particle emission reduction device body passageways structure partial schematic diagram based on acoustic agglomerator principle of the present invention.
Detailed description of the invention
The operation principle composition graphs 1 of emission reduction device of the present invention is summarized as follows:
By high pressure draught source 1(air compressor or high-pressure air feed source) high pressure draught that provides enters high pressure mixing chamber 2, to after high pressure draught pressure current stabilization in high pressure mixing chamber, select to enter high pressure siren 4, the strong acoustic generator 5 of resonant mode or modulation air-flow sound source 6 according to the optimum operating condition determined, be strong sound wave by high pressure draught Conversion of Energy in said flow sound source; This strong sound wave can adopt straight line, hyperbola or exponential line by horn 7(horn type line) enter coupling cabin uiform section section 8 and coupling cabin contraction section 9, after amplification is synthesized in resonance, entrant sound plate 10 is passed again in coupling cabin, then condensing cabin 11 underexcitation and under the effect of grille structure 39, forming plane standing-wave sound field, utilizing complete high pressure draught to discharge from the high pressure draught exhaust outlet 13 at coupling uiform section section 8 top, cabin; Control to adjust screw rod 41 by screw action mechanism 34 and drive removable end face 40 moving axially along expansion tank 44 in expansion tank 44, shift motion is not less than 1/2 of emission reduction device operating frequency lower limit (i.e. 800Hz) corresponding wavelength, to regulate the acoustic resonance frequencies in cohesion cabin 11 and expansion tank 44, make it consistent with sound source operating frequency.
Pending flue gas enters cohesion cabin 11 through smoke air inlet 17, and it is axially slow in cohesion cabin 11 downstream flow along grille structure 39, under the strong sound wave effect that the time is not more than 10 seconds, molecule cohesion in flue gas becomes the aggregate of large-size, flue gas domain size distribution completes from small size to large-sized differentiation, and pretreated flue gas is discharged from flue gas exhaust mouth 18, then after conventional deduster 20 further process, aggregate in flue gas is fully removed, and completes the reduction of discharging of fine particle.
In addition, emission reduction device provided by the invention can also realize strong sound wave and cleaning additive acting in conjunction to strengthen emission reduction effect further, concrete grammar is as follows: choose the water spray haze colloidal sol of less than 5 microns as cleaning additive, this cleaning additive is produced by the ultrasonic atomizer 16 of large discharge, after pending flue gas fully mixes with cleaning additive in smog hybrid chamber 43, inputted by smoke air inlet 17, and complete sonic agglomeration process in cohesion cabin 11.
In order to strengthen the applicability to dissimilar, domain size distribution and composition flue gas, the convenient real-time monitoring to flue gas emission reduction effect and adjustment, this emission reduction device also comprises multi-channel data transducing part and multichannel central control portion, and its composition and annexation are as shown in Figure 2.Multi-channel data transducing part comprises the air chamber pressure sensor 21 being positioned at high pressure mixing chamber 2, a flow sensor 22 in high pressure mixing chamber 2 exit, be positioned at a microphone 27 of coupling cabin uiform section section 8, be positioned at No. two flow sensors 28 in the smoke inlet pipe road be connected with smoke air inlet 17, a sampling and particle diameter spectrometer 32, humidity temperature pickup 29 between ultrasonic atomizer 16 and smog hybrid chamber 43 in pipeline, be positioned at the optical window 38 and the light source 30 be separately positioned on above and below this window and illumination photometer 31 that condense top, cabin 11 and bottom, described optical window 38, light source 30 and illumination photometer 31 are for measuring flue gas visibility with the fine grain state of aggregation that suspends in auxiliary monitoring flue gas.Be positioned at No. two microphones 33 in cohesion cabin 11, be positioned at No. two samplings and particle diameter spectrometer 35 that connect flue gas exhaust mouth 18 and conventional dust removal device 20 pipeline; Multichannel central control portion comprises the motor drive controller 23 arranging high pressure siren 4 operational factor, for regulating the servo mechanism controller 24 of resonant mode strong acoustic generator 5 geometric parameter, for driving and arrange power amplifier 25 and any wave generator 26 of modulation air-flow sound-source signal.Described multi-channel data transducing part is all connected with central Measurement &control computer 12 by data wire, described multichannel central control portion is all connected with central Measurement &control computer 12 by cable, and all sensing datas and control instruction are all by the unified process automatically of central Measurement &control computer 12.
In order to avoid condensing leakage and the pollution of strong sound wave in cabin 11, this emission reduction device additionally uses multiple sound insulation de-noising parts (as shown in Figure 2): install a silencer 14 at high pressure draught exhaust outlet 13 place, install No. two silencers 15 and install No. three silencers 19 at flue gas exhaust mouth 18 place at smoke air inlet 17 place, each silencer sphere of action is consistent with strong acoustic frequency scope; All be provided with sphere of action and the consistent sound insulating layer 37 of strong acoustic frequency scope at horn 7, coupling cabin uiform section section 8 and the cabin contraction section 9 that is coupled, the outer wall that condenses cabin 11, whole emission reduction device peripheral disposition has sound-absorbing material 36.
The body passageways structure of emission reduction device provided by the present invention comprises horn 7, coupling cabin uiform section section 8, coupling cabin contraction section 9, cohesion cabin 11 and expansion tank 44, as shown in Figure 1 and Figure 4: coupling cabin uiform section section 8 and coupling cabin contraction section 9, cohesion cabin 11, the cross section of expansion tank 44 is square, air-flow sound source and horn 7 entrance are tightly connected by an adpting flange 3, coupling cabin contraction section 9 is exported and is tightly connected by No. two adpting flanges 42 with cohesion one end, cabin 11, cohesion cabin 11 other end and expansion tank 44 one end are tightly connected by No. three adpting flanges 45, expansion tank 44 other end No. four adpting flanges 46 and expansion tank sealing plate 47 connecting sealed, between No. two adpting flanges 42, entrant sound plate 10 is installed, realizes from coupling cabin contraction section 9 to the cohesion high pressure draught in cabin 11 and being separated of strong sound wave, cohesion inside, cabin 11 is provided with grille structure 39 between smoke air inlet 17 and flue gas exhaust mouth 18, for condensing the plane standing-wave sound field in cabin 11 under realizing large flue gas flow condition.
Claims (9)
1. the Combustion Energy origin system fine particle emission reduction device based on acoustic agglomerator principle, it is characterized in that comprising with lower component: the high pressure draught source (1) of supply high pressure draught, the high pressure mixing chamber (2) of stable high voltage air-flow, it is the air-flow sound source (4 of signal specific strong sound wave by high pressure draught power conversion, 5, 6), an adpting flange (3), by air-flow sound source (4, 5, 6) horn (7) carried to downstream line of radiative acoustic wave energy, for realizing coupling cabin uiform section section (8) and coupling cabin contraction section (9) of strong acoustic resonance synthesis, discharge the high pressure draught exhaust outlet (13) having utilized complete high pressure draught in coupling cabin, hold flue gas and make it be subject to the cohesion cabin (11) of strong sound wave effect, No. two adpting flanges (42), realize the entrant sound plate (10) that high pressure draught is separated with strong sound wave, the grille structure (39) keeping plane standing-wave condition in cohesion cabin is made under large flue gas flow condition, input Combustion Energy origin system produces the smoke air inlet (17) of flue gas and discharges the flue gas exhaust mouth (18) of the rear flue gas of cohesion, for expansion tank (44) and the removable end face (40) of auxiliary adjustment cohesion cabin acoustic resonance frequencies, adjusting screw(rod) (41), screw action mechanism (34), No. three adpting flanges (45), No. four adpting flanges (46), expansion tank sealing plate (47), for removing the conventional dust removal device (20) of Large stone aggregate,
The gas outlet in high pressure draught source (1) is connected with the inlet seal of high pressure mixing chamber (2), the outlet of high pressure mixing chamber (2) by the pipeline of a point three respectively with each air-flow sound source (4, 5, 6) inlet seal connects, each air-flow sound source (4, 5, 6) outlet is connected with the inlet seal of horn (7) by an adpting flange (3), horn (7) outlet is tightly connected with the one end in cabin uiform section section (8) that is coupled, one end that the other end of coupling cabin uiform section section (8) is larger with cabin contraction section (9) cross section that is coupled is tightly connected, less one end, coupling contraction section (9) cross section, cabin by No. two adpting flanges (42) with condense cabin (11) one end and be tightly connected, between No. two adpting flanges (42), entrant sound plate (10) is installed, cohesion cabin (11) other end is tightly connected by No. three adpting flanges (45) and expansion tank (44), cohesion cabin (11) is provided with smoke air inlet (17) near the top of No. two adpting flange (42) one end, flue gas exhaust mouth (18) is provided with near the bottom of No. three adpting flange (45) one end, in cohesion cabin (11), grille structure (39) is installed, described grille structure (39) is positioned between smoke air inlet (17) and flue gas exhaust mouth (18), removable end face (40) is installed in expansion tank (44), this removable end face (40) is connected with screw action mechanism (34) by adjusting screw(rod) (41), screw action mechanism (34) is connected with central Measurement &control computer (12) by cable, move left and right in expansion tank (44) for controlling removable end face (40), to regulate the acoustic resonance frequencies of cohesion cabin (11) and expansion tank (44), expansion tank (44) is by being arranged on expansion tank sealing plate (47) sealing on No. four adpting flanges (46), described adjusting screw(rod) (41) is connected with screw action mechanism (34) through expansion tank sealing plate (47) central opening, flue gas exhaust mouth (18) is connected with conventional dust removal device (20) by connecting pipe, pending flue gas flows into through smoke air inlet (17), discharged after conventional deduster (20) process by flue gas exhaust mouth (18),
Also comprise air chamber pressure sensor (21), a flow sensor (22), No. two flow sensors (28), a microphone (27), No. two microphones (33), humidity temperature pickup (29), a sampling and particle diameter spectrometer (32), No. two samplings and particle diameter spectrometer (35), wherein air chamber pressure sensor (21) is positioned at high pressure mixing chamber (2), a flow sensor (22) is arranged on high pressure mixing chamber (2) exit, be respectively used to pressure and the flow of measuring the high pressure draught that high pressure draught source produces, a microphone (27) is positioned at coupling cabin uiform section section (8), for the acoustic pressure in measuring coupling cabin uiform section section (8), a sampling and particle diameter spectrometer (32), No. two flow sensors (28) are positioned at humidity temperature pickup (29) pipeline carrying Combustion Energy origin system to produce flue gas, be respectively used to measure input flue gas concentration, domain size distribution, flow, temperature and humidity, No. two microphones (33) are positioned at cohesion cabin (11), for measuring the acoustic pressure in cohesion cabin (11), No. two samplings are positioned at particle diameter spectrometer (35) pipeline being connected flue gas exhaust mouth (18) and conventional dust removal device (20), flue gas concentration and domain size distribution is exported for measuring, above-mentioned data sensor equipment is all connected with central Measurement &control computer (12) by data wire.
2., as claimed in claim 1 based on the Combustion Energy origin system fine particle emission reduction device of acoustic agglomerator principle, it is characterized in that: described high pressure draught source (1) can be air compressor or high-pressure air feed source, and available air-flow power is not less than 5 myriawatts.
3. as claimed in claim 1 based on the Combustion Energy origin system fine particle emission reduction device of acoustic agglomerator principle, it is characterized in that: described air-flow sound source (4,5,6) can be high pressure siren, the strong acoustic generator of resonant mode or modulation air-flow sound source; Described high pressure siren is controlled by the drive motor controller (23) be connected with central Measurement &control computer (12) by cable, the strong acoustic generator of described resonant mode is controlled by the servo mechanism controller (24) be connected with central Measurement &control computer (12) by cable, and described modulation air-flow sound source is controlled by any wave generator (25) be connected with central Measurement &control computer (12) by cable and power amplifier (26).
4., as claimed in claim 1 based on the Combustion Energy origin system fine particle emission reduction device of acoustic agglomerator principle, it is characterized in that: described conventional dust removal device (20) can be electrostatic precipitator, sack cleaner or cyclone dust collectors.
5. as claimed in claim 1 based on the Combustion Energy origin system fine particle emission reduction device of acoustic agglomerator principle, it is characterized in that: the ultrasonic atomizer (16) that can produce cleaning additive can also be comprised and in order to realize pending flue gas and the well-mixed smog hybrid chamber (43) of this cleaning additive; Described smog hybrid chamber (43) is arranged on the admission line that is connected with smoke air inlet (17), described ultrasonic atomizer (16) is connected on the admission line of conveying Combustion Energy origin system flue gas by connecting pipe, and now humidity temperature pickup (29) is positioned at the pipeline for connecting between ultrasonic atomizer (16) and smog hybrid chamber (43).
6. as claimed in claim 1 based on the Combustion Energy origin system fine particle emission reduction device of acoustic agglomerator principle, it is characterized in that: can also comprise and be installed on high pressure draught exhaust outlet (13) respectively, a silencer (14) of smoke air inlet (17) and flue gas exhaust mouth (18), No. two silencers (15) and No. three silencers (19), be installed on horn (7), coupling cabin uiform section section (8), coupling cabin contraction section (9), the sound insulating layer (37) of cohesion cabin (11) and expansion tank (44) outer wall, and at the sound absorption environment (36) of whole emission reduction device peripheral disposition.
7. as claimed in claim 1 based on the Combustion Energy origin system fine particle emission reduction device of acoustic agglomerator principle, it is characterized in that: can also comprise and be installed on the optical window (38) of cohesion cabin (11) bottom wall near flue gas exhaust mouth (18) position and offside top wall, the outside light source (30) of optical window (38) and illumination photometer (31) are also fixed in upper and lower both sides, cohesion cabin, office (11), described illumination photometer (31) is connected with central Measurement &control computer (12) by data wire, auxiliary monitoring suspension fine particle state of aggregation is realized by measuring flue gas visibility.
8. as claimed in claim 1 based on the Combustion Energy origin system fine particle emission reduction device of acoustic agglomerator principle, it is characterized in that: described horn (7), coupling cabin uiform section section (8), coupling cabin contraction section (9), cohesion cabin (11) and the cross section of expansion tank (44) are square, its concrete size can be determined according to flue gas flow rate U and strong sound wave sound pressure level SPL, action time T in known pending maximum flue gas volume flow Q, cohesion cabin, and concrete computational process is as follows:
Cohesion cabin (11) sectional area S
2for Q/Um
2, cohesion cabin (11) length L
2be not less than T*Um, and then obtain air-flow sound source (4,5,6) power W and air-flow power W
0:
W
0＝W/η
Wherein η is the conversion efficiency of air-flow sound source (4,5,6); The discharge area S of air-flow sound source (4,5,6)
0:
S
0＝W/10
7
The sectional area S of coupling cabin uiform section section (8)
1for cohesion cabin (11) sectional area S
24 to 16 times, coupling cabin uiform section section (8) length L
1be not less than described emission reduction device operating frequency lower limit---the wavelength that 800Hz is corresponding:
L
1≥c
0/800
Wherein c
0for THE VELOCITY OF SOUND IN AIR, be 340m/s;
Coupling cabin contraction section (9) and horn (7) profile are positive truncated rectangular pyramids, the length L of coupling cabin contraction section (9)
3:
Wherein θ
1for the angle of be coupled contraction section (9) side, cabin and axis;
Horn (7) profile comprises four walls, wherein two, upper and lower wall is straight flange, another two walls are curved side, and curved side shape line can be straight line, hyperbola or exponential line, and the shape line of described coupling cabin contraction section (9) four walls is straight line; The discharge area S of horn (7) inlet area and air-flow sound source (4,5,6)
0identical, horn (7) discharge area and cabin uiform section section (8) the area S that is coupled
1identical, the length L of horn (7)
0:
Wherein θ
2for the angle of horn (7) side and axis;
Groined type grille structure (39) is installed to keep meeting plane standing-wave condition in cabin in cohesion cabin (11), wherein grille structure each unit on the cross section of looking along cohesion cabin axis (11) is square, according to waveguide theory, its each unit length of side L
4be not more than c
0/ (2f), f are described emission reduction device operating frequency;
Expansion tank (44) sectional area S
3equal to condense cabin (11) sectional area S
2, expansion tank (44) length L
5be not less than the half of described emission reduction device operating frequency lower limit 800Hz corresponding wavelength.
9. as claimed in claim 1 based on the Combustion Energy origin system fine particle emission reduction device of acoustic agglomerator principle, it is characterized in that: described horn (7), coupling cabin uiform section section (8), coupling cabin contraction section (9), cohesion cabin (11) and the wall thickness of expansion tank (44) are in 0.01m to 0.05m scope, and wall is cast iron, carbon steel or stainless steel; Entrant sound plate (10) is a solid sheet, and its thickness is in 0.002m to 0.004m scope, and area is not less than cohesion cabin (11) sectional area S
2, material is aluminium or titanium.
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| BE1027227B1 (en) * | 2019-04-25 | 2020-11-23 | Atlas Copco Airpower Nv | Apparatus and method for separating liquid from a gas and compressor apparatus provided with such apparatus |
| CN110652815B (en) * | 2019-09-20 | 2021-12-28 | 南京工程学院 | Sound wave dust removal method for cooperatively controlling smoke suspended particles through sound field test and simulation |
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