CN107516508A - A kind of cement plant Noise Controlling in Comprehensive method - Google Patents
A kind of cement plant Noise Controlling in Comprehensive method Download PDFInfo
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- CN107516508A CN107516508A CN201711028980.6A CN201711028980A CN107516508A CN 107516508 A CN107516508 A CN 107516508A CN 201711028980 A CN201711028980 A CN 201711028980A CN 107516508 A CN107516508 A CN 107516508A
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- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
- G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/16—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
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Abstract
The invention discloses a kind of cement plant Noise Controlling in Comprehensive method, comprise the following steps that：First, according to factory's circle scope, some noise monitoring points, setting monitoring time and monitoring condition is set, monitors and obtains data；2nd, obtained data will be monitored compared with standard value, the monitoring point exceeded to wherein factory circle and periphery sensitivity spot noise is analyzed；3rd, according to the analysis of step 2, equipment, the sound source species of plant area's sound source point are determined；4th, according to equipment, sound source species, equipment is divided into equipment and on-site equipment in factory building, bonding apparatus safety in production needs, the comprehensive regulation is carried out according to equipment harmony source category, the Source Spectrum of test point after improvement is set to meet noisc rating number, and after administering, detected value≤standard value 3db of the single sound source in test point.The present invention thoroughly solves the improvement problem of cement plant noise by the above method.
Description
Technical field
The present invention relates to a kind of noise abatement method, more particularly to a kind of cement plant Noise Controlling in Comprehensive method.
Background technology
In process of production, noise circumstance is extremely complex in cement plant, and prior art is all adopted when administering cement plant noise
With a mode for processing, and to the processing of certain point, because sound source comes from production equipment, in order to not influence production equipment,
Prior art mainly uses sound-proof wall or silencer cover, but greatest problem caused by the mode of this point processing is, to single
Process points, noise abatement is qualified, and is found when the noise to whole cement plant is monitored, and noise abatement is not
Qualified.
Provided according to the standard of noise abatement, resolution must use following standard and data to surpass as foundation
Go out standard regulation：
1st, the People's Republic of China (PRC)《Noise pollution prevention method》、
2、《Industrial Enterprise Factory Boundary ambient noise discharge standard》GB12348-2008、
3rd, the People's Republic of China (PRC)《Industrial enterprise's noise sanitary standard》、
4、《Standard for acoustic environmental quality》GB3096-2008、
5、《Code for design of noise cintrol in industrial enterprises》GBJ87-85、
6th, field monitoring data.
It is for administering reached target：
1st, factory circle and sensitive spot are both needed to reach environmental impact assessment requirement；
2nd, the selection of material is moistureproof, fire-retardant, corrosion-resistant, nontoxic, tasteless environmental protection；
3rd, increase noise reducing apparatus newly and do not produce secondary disaster, do not influence ventilation and heat, conventional maintenance, maintenance and the use of original equipment；
4th, the noise reducing apparatus such as sound proof window, soundproof door, muffler facility service life ensured more than 10 years.
Because cement plant plant area Main Noise Sources have coal mill, cement grinding mill, raw mill, kiln tail blower fan, kiln hood blower fan, kiln tail electricity
Dust-precipitator blower fan, packaging, shipping etc., production on-site sound source device is more, all types of caused by the operating of its normal work
Noise interacts, interferes with each other superposition, does not provide in the prior art for the reasonable of the cement plant factory outside noise comprehensive regulation
Scheme.
The content of the invention
In order to solve the deficiencies in the prior art, it is an object of the invention to provide a kind of cement plant noise synthesis to control
Reason method.
To reach above-mentioned purpose, the technology used in the present invention means are：A kind of cement plant Noise Controlling in Comprehensive method, tool
Body step is as follows：
First, according to factory's circle scope, some noise monitoring points, setting monitoring time and monitoring condition is set, monitors and obtains data；
2nd, obtained data will be monitored compared with standard value, the prison exceeded to wherein factory circle and periphery sensitivity spot noise
Measuring point is analyzed；
3rd, according to the analysis of step 2, equipment, the sound source species of plant area's sound source point are determined；
4th, according to equipment, sound source species, equipment is divided into equipment and on-site equipment in factory building, bonding apparatus safety in production needs
Will, the comprehensive regulation is carried out according to equipment harmony source category, the Source Spectrum of test point after improvement is met noisc rating number, and administer
Afterwards, detected value≤standard value -3db of the single sound source in test point.
Further, equipment, the sound source species for determining plant area's sound source point refers to：Determine to make an uproar caused by equipment
Sound is single noise or recombination noise, and noise of equipment sound source species is mechanical noise, air power noise, the one of electromagnetic noise
Kind is several compound.
Further, the bonding apparatus safety in production needs refer to：1st, the blower fan energy caused by muffler flowing resistance
Consumption increase is no more than 3%；2nd, for the higher place of temperature, in conditions permit, radiated using Unpowered ventilation；3rd, for electricity
Machine, the operating ambient temperature of air compressor machine are reduced in safe handling temperature range；4th, noise abatement equipment does not influence inspection and dimension
Repair.
Further, it is described to refer to according to the progress comprehensive regulation of equipment harmony source category：The recombination noise of equipment is decomposed
For single noise caused by specific noise spot structure in equipment, then single noise is administered；Wherein mechanical noise is controlled
Reason uses sound insulation mode, but need to set absorbent treatment in sound source face；Electromagnetic noise, which is administered, need to handle diffraction and reverberation simultaneously, and necessary
Bonding apparatus safety in production needs；Air power noise is administered mainly for diffraction, using impedance complex formula noise reduction, and is divulged information
Resistance ＜ 100Pa.
Further, the mechanical noise administer for In Mine Crusher, transport gallery, raw material crushing machine, raw coal mill,
Cement grinding mill, PH rappings；Electromagnetic noise administers the motor for various blower fans, the motor of roots blower, various crane heads, belt
The motor of head, the motor of various grinding machines；The air power noise is administered for various dedusting fans, various Roots
Blower fan, circulating fan, high-temperature blower, oxygen supply blower fan, the cooling blower of rotary kiln, the impulse bag-type dust remover impulse valve of cooling device.
Further, the mechanical noise of the transport gallery is administered, belt conveyer frame and gallery bottom plate it
Between vibration insulation structure is set, for preventing solid-borne sound transmission.
Further, the air power noise of the various dedusting fans is administered just for fan body and air outlet
Administered；The circulating fan, the air power noise of high-temperature blower are administered just for the fan body and drive blower fan
Motor administered；The various roots blowers, the air power noise of oxygen supply blower fan of cooling device are administered just for entering
Air port and fan body；The air power noise of the cooling blower of the rotary kiln is administered and is directed to air inlet, air outlet and blower fan
Body.
Further, the air power noise of the impulse bag-type dust remover impulse valve is administered, and impulse bag is removed
The exhaust outlet of some pulse valves of dirt device accesses duster pulse silencing means by air pipe, passes through solid expansion noise reduction and resistance
Formula noise reduction heel row goes out gas, reaches the purpose of noise reduction.
The beneficial effects of the invention are as follows：Produced by the way that the recombination noise of equipment is decomposed into equipment into specific noise spot structure
Raw single noise, bonding apparatus safety in production need, and carry out the comprehensive regulation according to equipment harmony source category, are detected after making improvement
The Source Spectrum of point meets noisc rating number, and sound source value≤standard value -3db, the improvement problem for thoroughly solving cement plant noise.
Brief description of the drawings
The invention will be further elaborated with reference to the accompanying drawings and examples.
Fig. 1 is the production process figure in cement plant in the prior art.
Specific embodiment
For reason of problems in the prior art, inventor find to have during research and development many people think that, do
Noise abatement is very simple, only builds a wall or do some acoustic barriers, but in the noise abatement in cement plant, leads to
The improvement of prior art is crossed, in many cases, noise decline effect is more apparent, but all the time can not be up to standard, only poor several from value up to standard
Individual decibel, how really up to standard, prior art can not but be answered.
Such as：By 2 class standards, night is less than or equal to 50dB, but most of cement plant is to use electricity in off-peak hours, and is produced at night,
To be dropped to from 55dB within 50dB, cost that flower goes out is that the summation of above all control expenses is more, therefore " drop a bit "
The difference of " drop is up to standard " is very big, and the noise abatement for cement plant is a systematic engineering of business, including Source Spectrum is analyzed, and leads to
The design of wind, muffler structure, also to meet to divulge information, radiate, daylighting, inspection, all many requirements such as service life, simultaneously
It is contemplated that energy-conservation.
In noise reduction process, if the design of muffler is unreasonable, low frequency noise reduction is poor, and the audio spectrum of processing does not meet NR songs
Line, and all-bottom sound has a great influence to human heart, especially to old man and child, because all-bottom sound wavelength diffracting power is good, in sky
Decaying in gas weak, propagation distance is remote, and the influence to people is big, so, it is necessary to keypoint treatment low frequency in the case of equivalent sound value is up to standard
Sound, it is proposed that the Source Spectrum of test point meets noisc rating number after administering, and after improvement, detected value of the single sound source in test point
≤ standard value -3db, its reason be that, by it is proposed that method, all-bottom sound can be administered well, and can prevents multiple spot
Sound source superposition causes sound source value exceeded.
Therefore, we pass through long-term research, finally propose a kind of cement plant Noise Controlling in Comprehensive method, specific steps
It is as follows：
First, according to factory's circle scope, some noise monitoring points, setting monitoring time and monitoring condition is set, monitors and obtains data；
2nd, obtained data will be monitored compared with standard value, the prison exceeded to wherein factory circle and periphery sensitivity spot noise
Measuring point is analyzed；
3rd, according to the analysis of step 2, equipment, the sound source species of plant area's sound source point are determined；
4th, according to equipment, sound source species, equipment is divided into equipment and on-site equipment in factory building, bonding apparatus safety in production needs
Will, the comprehensive regulation is carried out according to equipment harmony source category, the Source Spectrum of test point after improvement is met noisc rating number, and administer
Afterwards, detected value≤standard value -3db of the single sound source in test point.
Equipment, the sound source species for determining plant area's sound source point refers to：It is single to determine noise caused by equipment
Noise or recombination noise, noise of equipment sound source species are mechanical noise, air power noise, the one or more of electromagnetic noise
It is compound.
The bonding apparatus safety in production needs refer to：1st, the fan energy consumption increase caused by muffler flowing resistance does not surpass
Cross 3%；2nd, for the higher place of temperature, in conditions permit, radiated using Unpowered ventilation；3rd, for motor, air compressor machine
Operating ambient temperature is reduced in safe handling temperature range；4th, noise abatement equipment does not influence inspection and maintenance.
It is described to refer to according to the progress comprehensive regulation of equipment harmony source category：The recombination noise of equipment is decomposed into equipment and had
Single noise caused by bulk noise point structure, is then administered to single noise；Wherein mechanical noise is administered using sound insulation
Mode, but absorbent treatment need to be set in sound source face；Electromagnetic noise, which is administered, need to handle diffraction and reverberation simultaneously, and must bonding apparatus peace
Full production needs；Air power noise is administered mainly for diffraction, using impedance complex formula noise reduction, and flowing resistance ＜
100Pa。
The mechanical noise is administered to shake for In Mine Crusher, transport gallery, raw material crushing machine, raw coal mill, cement grinding mill, PH
Beat；Electromagnetic noise administer for various blower fans motor, the motor of roots blower, various crane heads, the motor of belt conveyer head,
The motor of various grinding machines；The air power noise is administered for various dedusting fans, various roots blowers, circulated air
Machine, high-temperature blower, oxygen supply blower fan, the cooling blower of rotary kiln, the impulse bag-type dust remover impulse valve of cooling device.
The mechanical noise of the transport gallery is administered, and vibration isolation knot is set between the frame of belt conveyer and gallery bottom plate
Structure, for preventing solid-borne sound transmission.
The air power noise of the various dedusting fans is administered and administered just for fan body and air outlet；Institute
State circulating fan, the air power noise of high-temperature blower is administered just for the fan body and drives the motor of blower fan to be controlled
Reason；The various roots blowers, the air power noise for supplying oxygen blower fan of cooling device are administered just for air inlet and blower fan sheet
Body；The air power noise of the cooling blower of the rotary kiln is administered and is directed to air inlet, air outlet and fan body.
The air power noise of the impulse bag-type dust remover impulse valve is administered, by some arteries and veins of pulse bag type dust collector
The exhaust outlet for rushing valve accesses duster pulse silencing means by air pipe, by being discharged after solid expansion noise reduction and resistive noise reduction
Gas, reach the purpose of noise reduction.
As basic production process in reflected existing cement plant in Fig. 1, grinding machine are the important milling equipments in cement plant, water
In mud factory production process, grinding machine is mainly used in the preparation of coal dust, raw material and cement.
Such as raw mill：For the mechanical noise of mill body, both sides use sound absorption and insulation barrier（I.e. it is interior inhale, outside every）, make raw mill
Around will not produce reverberation, and electric mill machine is electromagnetic noise, need to consider to be easy to motor radiating, now will using ventilation muffler
Motor is sent into cool breeze outside barrier, is blasted by the self-radiating blower fan of motor in the body of motor, motor is reached abundant
Radiating, improvement here needs the 4 point requirements for meeting the bonding apparatus safety in production needs.1st, muffler flowing resistance institute
Caused fan energy consumption increase is no more than 3%；2nd, for the higher place of temperature, in conditions permit, dissipated using Unpowered ventilation
Heat；3rd, the operating ambient temperature for motor, air compressor machine is reduced in safe handling temperature range；4th, noise abatement equipment not shadow
Ring inspection and maintenance.
Cement grinding mill is general all indoors, due to daylighting and the needs of ventilation and heat, it is necessary to using lighting and ventilation noise reduction window, door
Change soundproof door into, such indoor radiating shut even in gate it is also ensured that.
Coal is ground：The discrete mill of coal mill and sleeping mill, Vertical Mill sound value is smaller, if indoors without administering, if in outdoor, can use and administer
The method of raw mill is administered.If sleeping mill, typically all indoors, the same cement grinding mill of method.
Blower fan is the main air draft in cement plant and ventilation apparatus, such as cement plant cement grinding mill, raw material mill, kiln tail, electric cleaner
Deng there is exhaust blower.Because inlet and outlet air power noise and fan vibration can produce noise during blower fan work, its noise is special
Point is sound pressure level height, and bandwidth, propagation is remote, coverage is wide.
The air power noise of the various dedusting fans is administered and carried out just for fan body and air outlet by we
Administer；The electricity of blower fan is administered just for the fan body and driven to the circulating fan, the air power noise of high-temperature blower
Machine is administered；The various roots blowers, the air power noise for supplying oxygen blower fan of cooling device are administered just for air inlet
And fan body；The air power noise of the cooling blower of the rotary kiln is administered and is directed to air inlet, air outlet and fan body.
And administered for the air power noise of the impulse bag-type dust remover impulse valve, by pulse bag type dust collector
The exhaust outlet of some pulse valves accesses duster pulse silencing means by air pipe, passes through solid expansion noise reduction and resistive noise reduction
Heel row goes out gas, reaches the purpose of noise reduction.
The present invention by the way that the recombination noise of equipment is decomposed into equipment into single noise caused by specific noise spot structure,
Bonding apparatus safety in production needs, and carries out the comprehensive regulation according to equipment harmony source category, makes the Source Spectrum of test point after improvement
Meet noisc rating number, and sound source value≤standard value -3db, the improvement problem for thoroughly solving cement plant noise.
Above is presently preferred embodiments of the present invention is illustrated, but the present invention is not limited in above-mentioned reality
Example is applied, a variety of equivalent changes can also be made under the precondition without prejudice to spirit of the present invention by being familiar with the scientific and technical personnel of this area
Type is either replaced, and these equivalent modifications or replacement are all contained in the application claim limited range.
Claims (8)
1. a kind of cement plant Noise Controlling in Comprehensive method, is comprised the following steps that：
First, according to factory's circle scope, some noise monitoring points, setting monitoring time and monitoring condition is set, monitors and obtains data；
2nd, obtained data will be monitored compared with standard value, the prison exceeded to wherein factory circle and periphery sensitivity spot noise
Measuring point is analyzed；
3rd, according to the analysis of step 2, equipment, the sound source species of plant area's sound source point are determined；
4th, according to equipment, sound source species, equipment is divided into equipment and on-site equipment in factory building, bonding apparatus safety in production needs
Will, the comprehensive regulation is carried out according to equipment harmony source category, the Source Spectrum of test point after improvement is met noisc rating number, and administer
Afterwards, detected value≤standard value -3db of the single sound source in test point.
2. Noise Controlling in Comprehensive method in cement plant according to claim 1, it is characterised in that：Determination plant area sound
Equipment, the sound source species of source point refer to：Determine that noise caused by equipment is single noise or recombination noise, noise of equipment sound source
Species be mechanical noise, air power noise, electromagnetic noise it is one or more of compound.
3. Noise Controlling in Comprehensive method in cement plant according to claim 1, it is characterised in that：The bonding apparatus is raw safely
Production needs refer to：1st, the fan energy consumption increase caused by muffler flowing resistance is no more than 3%；2nd, for the higher place of temperature,
In conditions permit, radiated using Unpowered ventilation；3rd, the operating ambient temperature for motor, air compressor machine is reduced to safe handling
In temperature range；4th, noise abatement equipment does not influence inspection and maintenance.
4. Noise Controlling in Comprehensive method in cement plant according to claim 1, it is characterised in that：Foundation equipment and the sound source
Species carries out the comprehensive regulation and referred to：The recombination noise of equipment is decomposed into equipment single caused by specific noise spot structure make an uproar
Sound, then single noise is administered；Wherein mechanical noise administers the sound insulation mode that uses, but need to set and absorb sound in sound source face
Layer；Electromagnetic noise, which is administered, need to handle diffraction and reverberation simultaneously, and must bonding apparatus safety in production needs；Air power noise
Administer mainly for diffraction, using impedance complex formula noise reduction, and flowing resistance ＜ 100Pa.
5. Noise Controlling in Comprehensive method in cement plant according to claim 4, it is characterised in that：The mechanical noise administers pin
To In Mine Crusher, transport gallery, raw material crushing machine, raw coal mill, cement grinding mill, PH rappings；Electromagnetic noise is administered and is directed to various wind
The motor of machine, the motor of roots blower, various crane heads, the motor of belt conveyer head, the motor of various grinding machines；The sky
Aerodynamic force noise abatement is directed to the oxygen supply of various dedusting fans, various roots blowers, circulating fan, high-temperature blower, cooling device
Blower fan, the cooling blower of rotary kiln, impulse bag-type dust remover impulse valve.
6. Noise Controlling in Comprehensive method in cement plant according to claim 5, it is characterised in that：The machinery of the transport gallery
Noise abatement, vibration insulation structure is set between the frame of belt conveyer and gallery bottom plate, for preventing solid-borne sound transmission.
7. Noise Controlling in Comprehensive method in cement plant according to claim 5, it is characterised in that：The various dedusting fans
Air power noise is administered and administered just for fan body and air outlet；The air of the circulating fan, high-temperature blower
Aerodynamic Noise of A is administered just for the fan body and drives the motor of blower fan to be administered；The various roots blowers, cooling
The air power noise of the oxygen supply blower fan of device is administered just for air inlet and fan body；The sky of the cooling blower of the rotary kiln
Aerodynamic force noise abatement is directed to air inlet, air outlet and fan body.
8. Noise Controlling in Comprehensive method in cement plant according to claim 5, it is characterised in that：The pulse bag type dust collector
The air power noise of pulse valve is administered, and the exhaust outlet of some pulse valves of pulse bag type dust collector is accessed by air pipe
Duster pulse silencing means, gas is gone out by solid expansion noise reduction and resistive noise reduction heel row, reaches the purpose of noise reduction.
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Cited By (2)
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| CN110555549A (en) * | 2019-08-22 | 2019-12-10 | 万洲电气股份有限公司 | Intelligent optimization energy-saving system based on peak staggering energy saving of grinding system |
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Application publication date: 20171226 |
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