CN108237010B - A kind of coal pulverizer safe operation detection system and its detection method - Google Patents
A kind of coal pulverizer safe operation detection system and its detection method Download PDFInfo
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- CN108237010B CN108237010B CN201810057316.2A CN201810057316A CN108237010B CN 108237010 B CN108237010 B CN 108237010B CN 201810057316 A CN201810057316 A CN 201810057316A CN 108237010 B CN108237010 B CN 108237010B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C23/00—Auxiliary methods or auxiliary devices or accessories specially adapted for crushing or disintegrating not provided for in preceding groups or not specially adapted to apparatus covered by a single preceding group
- B02C23/04—Safety devices
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D21/00—Measuring or testing not otherwise provided for
- G01D21/02—Measuring two or more variables by means not covered by a single other subclass
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Abstract
The invention discloses a kind of coal pulverizer safe operation detection system and its detection methods, belong to coal pulverizer technical field.It includes import hot air pipe, discharge pipeline and the raw coal entrance on coal pulverizer, it further include inert gas duct, hot blast temperature sensor, sampling pipe and raw coal inlet pressure transducer, import hot air pipe is equipped with hot blast temperature sensor, inert gas duct is connected to import hot air pipe, discharge pipeline is equipped with sampling pipe, raw coal entrance is equipped with raw coal inlet pressure transducer, and hot blast temperature sensor, sampling pipe and raw coal inlet pressure transducer are connect with control centre.Lead to the problem of CO content detection inaccuracy for coal dust accumulation detection probe in the coal pulverizer CO content detection of the prior art, the problem that it can prevent coal dust accumulation from causing probe detection inaccurate, more accurately CO content in coal pulverizer is detected, prevents the spontaneous combustion of coal pulverizer from exploding.
Description
Parent application number: 201710344739.8, the applying date: on May 16th, 2017, patent name: a kind of coal pulverizer is anti-
Quick-fried detection system and its detection method.
Technical field
The present invention relates to coal pulverizer technical field more particularly to a kind of coal pulverizer safe operation detection system and its detection sides
Method.
Background technique
Coal-grinding process is that coal is broken and its ever-increasing process of surface area.Coal is milled into coal dust in coal pulverizer,
Mainly carried out by crushing, smashing and grinding three kinds of modes.It is total to wish to be ground coal dust in order to improve the efficiency of combustion of coal dust
Grind more carefully, the surface area that coal dust more detailed rules and regulations are contacted with air is bigger, more aggravate the oxidation reaction with oxygen in air, this
Sample can be such that the coal dust temperature stockpiled in container increases, and be easier to that the spontaneous combustion of coal dust occurs and then cause explosion.Coal pulverizer is worked
Spontaneous combustion explosion is also easy to produce in journey, mainly the oxidation reaction of oxygen generates CO in coal dust and air, and CO gas concentration is in coal pulverizer
The increase of the internal confined space reduces the ignition point of flammable mixture in coal pulverizer, increases mill fire or explosion
Risk can accelerate spontaneous combustion to explode in addition, coal pulverizer internal temperature and pressure sharply increase.
CO content is the principal element for causing coal pulverizer spontaneous combustion to explode in coal pulverizer, when CO content detection, generally uses band
There is a probe of filter device, but probe has used long to be prone to wear and coal dust is easily deposited at the gas access of probe, causes to sample
Inaccuracy, sample rate is slow, filters out bulky grain coal dust by filter device, carries out the pre- place such as cooling, dedusting, water removal later
Reason, finally analyzes CO gas, and analysis method mainly includes electrochemical methods and infra-red method, but electrochemical methods
Although fast response time, there is accumulative drift, and directly to contact with CO gas；And in contrast, infra-red method detection
Speed is slower, and cost is high, and very sensitive to shaking, maintainability is poor, and there is discord gas directly to contact, non-accumulated drift phenomenon
Advantage.After detecting that the CO content in coal pulverizer is exceeded, the prior art mainly adopts the means directly shut down to prevent coal-grinding
Machine spontaneous combustion explosion is also recorded in some documents and is passed through the mode of inert gas into coal pulverizer and eliminates dieseling, improves datonation-inhibition
Performance, but being passed through for inert gas will increase coal pulverizer internal pressure, it is in the prior art to consider CO content opposite grinding in coal pulverizer more
It is influenced brought by the explosion of coal machine, rarely considers that the variation of temperature and pressure influences coal pulverizer internal condition bring, but
Pressure and temperature increase will lead to the danger of coal pulverizer spontaneous combustion explosion.Currently, most of the country power plant is mainly by coal-grinding
Machine exports medium temperature monitoring to differentiate the precarious position whether caught fire in coal pulverizer or in explosion, the shortcoming of the method
Mainly: on the one hand cannot be identified and be handled to firing in time, because pulverizer outlet temperature is by coal pulverizer inlet hot wind
It is adjusted with cold-air flap, when pulverizer outlet temperature is high, usual operations staff, which can turn down hot air disperser, hold big cold-air flap is adjusted
Section has caught fire in coal pulverizer, will occur at this time quick-fried if pulverizer outlet temperature cannot still be restored to normal value after adjusting
Fried has been inevitable；Another aspect pulverizer outlet temperature can not react whether in the hole in coal pulverizer completely,
Temperature is to influence one of the factor of younger sister's explosion, when combustable gas concentration is higher, even if lower temperature, can also be occurred quick-fried
It is fried.
Chinese invention patent, publication number: publication date: 102270374A on December 7th, 2011, discloses a kind of CO gas
Detect warning device, belong to pernicious gas detection technique field, it include CO gas detection alarm signal processing governor circuit,
Electrochemical sensor, CO gas detection PPM value LCD display and CO gas detection combined aural and visual alarm.It is characterized in that being additionally arranged pair
Electrochemical sensor shield by CO gas detection alarm signal processing master control system single-chip microcontroller output signal CPU program
The relay K coil and contact switch of control.In addition, being simultaneously emitted by RS485 signal and 4-20mACO gas concentration PPM value moulds
Analog quantity signal, so that alarm signal makes accident to leak the coal gas be likely to be obtained timely solution processing by the other systems of network insertion.
Disadvantage is that the patent is detected to pernicious gas, apply on coal pulverizer that there are still many problems, such as CO content
The problem of transmission detection lag etc..
Publication number: 104771852A publication date: Chinese invention patent on 2015 days 15, it is lazy to disclose a kind of coal dust pot
Property gas shield device and its application method, it includes CO2Output pipe and N2Output pipe；CO2It is sequentially connected in series on output pipe
Connect the first master control valve, the first decompression table, the first vaporizer, the first inerting controller and first throttle valve, CO2Output pipe
One end connects CO2Storage device, the other end connect more than one CO2Bye-pass, every CO2Bye-pass connects the upper of a powder tank
Portion；N2Be sequentially connected in series on output pipe the second master control valve, the second decompression table, the second vaporizer, the second inerting controller and
Second throttle, N2One end of output pipe connects N2Storage device, the other end connect more than one N2Bye-pass, every N2
Bye-pass connects the lower part of a powder tank；Monitoring device is provided on each powder tank, each monitoring device is separately connected control system
System, control system are separately connected the first master control valve and the second master control valve.The invention can effectively prevent spontaneous combustion of pulverized coal and make
Inert gas is lenitively passed through in coal dust pot, to guarantee that pulverized coal particle lenitively reaches stable state.Disadvantage is that:
The patent is exploded for the anti-spontaneous combustion of coal dust pot, and coal dust pot is the coal dust for storing coal pulverizer milled, and internal condition is more
Simply, and it is small in size；The patent is all made of valve, inert gas (carbon dioxide and nitrogen) to each coal dust pot, passes through control
System, which is realized, carries out real-time monitoring to coal dust pot internal gas and temperature conditions, and control and maintenance cost are higher, are not suitable for grinding
It is promoted the use of on coal machine；Thermocouple is located at the outside of coal dust pot, can not actual response coal dust pot internal temperature variable condition,
Error is larger, does not have actual protective effect；Although secondly, inert gas can play reduce spontaneous combustion explosion a possibility that,
But the addition of inert gas will increase coal dust pot internal pressure, bring burden for fine coal tank, long easily exceeds fine coal tank originally
Pressure limit increase explosion a possibility that.
Summary of the invention
1. technical problems to be solved by the inivention
Cause CO content detection inaccurate for coal dust accumulation detection probe in the coal pulverizer CO content detection of the prior art
The problem of, the present invention provides a kind of coal pulverizer safe operation detection system and its detection methods.It can prevent coal dust from accumulating
The problem for leading to probe detection inaccuracy, more accurately detects CO content in coal pulverizer, prevents the spontaneous combustion of coal pulverizer
Explosion.
2. technical solution
To solve the above problems, technical solution provided by the invention are as follows:
A kind of coal pulverizer safe operation detection system, including import hot air pipe, the discharge pipeline being located on coal pulverizer
It further include inert gas duct, hot blast temperature sensor, sampling pipe and raw coal inlet pressure transducer, import with raw coal entrance
Hot air pipe is equipped with hot blast temperature sensor, and inert gas duct is connected to import hot air pipe, and discharge pipeline is equipped with and adopts
Sample pipe, raw coal entrance are equipped with raw coal inlet pressure transducer, hot blast temperature sensor, sampling pipe and raw coal inlet pressure sensing
Device is connect with control centre.Control centre is monitored coal pulverizer inlet and outlet pressure, internal temperature and CO content, accurate to examine
CO content in coal pulverizer is surveyed, prevents coal pulverizer spontaneous combustion from exploding.
Preferably, the coal pulverizer further includes coal mill system and coal pulverizer main body, and coal mill system is located at coal pulverizer main body
Interior, raw coal entrance is located above coal pulverizer main body, is connected to by raw coal coal feeding pipe with coal mill system, and force samples pipe passes through raw coal
Coal feeding pipe side wall, into raw coal coal feeding pipe, force samples pipe is located at one end in raw coal coal feeding pipe equipped with raw coal entrance pressure
Force snesor.Raw coal inlet pressure transducer detection raw coal inlet pressure and discharge pressure match, and pass through control centre
Control prevent coal pulverizer from spontaneous combustion explosion occurs by coal pulverizer work in negative pressure state.
Preferably, the inlet of the import hot air pipe is equipped with three-way connection, and three-way connection includes threeway port one, three
Go side mouthful two and threeway port three, threeway port one are connected to import hot air pipe, and threeway port two is connected to air preheater, and three
Go side mouthful three is connected to inert gas duct, and air preheater preheats air, and inert gas is for adjusting in coal pulverizer
The safe operating condition operation of coal pulverizer is realized in portion's pressure and the explosion-proof effect of inertia.
Preferably, the sampling pipe passes through the side wall of discharge pipeline, is deep into discharge pipeline, sampling pipe
One end in discharge pipeline is equipped with pressure-temperature sensor, and pressure-temperature sensor is connect with control centre.Pressure
Power temperature sensor detects the pressure and temperature of discharge, and together with the pressure of coal pulverizer, control coal pulverizer is in negative pressure work
Make state, temperature condition meets normal operation and requires, and guarantees coal pulverizer safe operation.
Preferably, there are two the sampling pipe is total to, two sampling pipes are located at same level in discharge pipeline
It is interior.Two sampling pipes work alternatively, and sample the parameter value at discharge same position, guarantee that sampling pipe real-time sampling coal dust goes out
Mouth CO content, pressure and temperature value, so that CO content is normal in coal pulverizer, coal pulverizer is normally safe.
Preferably, the pipeline that the threeway port two is connected to air preheater is equipped with hot blast temperature sensor and valve
Door, the pipeline that the threeway port three is connected to inert gas duct are equipped with valve, and valve is connect with control centre, air
Pre-heater inlet is located on air preheater, and air preheater entrance is connected to air pipeline.Air preheater heats air hose
The air of road input, is passed into coal pulverizer, the intake of hot-air is controlled by valve, to control the temperature inside coal pulverizer
Degree and pressure, so that coal pulverizer is in safe operation state.
Preferably, one end that sampling pipe is located at discharge pipeline external is equipped with Multistage filtering device, multistage filtering dress
It being equipped in setting and is successively arranged sampling pump, draining pump and solenoid valve, sampling pump, draining pump and solenoid valve are connect with control centre,
Moisture and impurity are filtered out by Multistage filtering device, the detection of CO content can be made more accurate.
Preferably, sampling pipe sweeps pipeline with blowback respectively and pump-line is connected to after Multistage filtering device, anti-scavenging conduit
The interface that the interface and pump-line that road is connected to sampling pipe are connected to sampling pipe is equipped with valve, valve and control centre
Connection.Work is swept to the blowback of sampling pipe by valve control by control centre, prevents sampling blockage.
Preferably, the sampling pipe be curve bend, inside discharge pipeline it is open at one end upward, it is described
Sampling pipe built in inner tube, the end face of inner tube is equipped with pressure-temperature sensor, and pressure-temperature sensor includes pressure sensor
And temperature sensor, the pressure sensor and temperature sensor are respectively positioned on end face, connect with control centre.Inner tube is used for
Route cabling is used, and the setting of inner tube increases the service life of sampling pipe, increases the reliability of detection system.
A kind of coal pulverizer safe operation detection method:
A, it constructs a kind of above-described coal pulverizer and is safely operated detection system；Raw coal inlet pressure transducer, hot wind temperature
The signal that degree sensor and pressure-temperature sensor will test is transported to control centre；
B, the empirical value summarized in the characteristic that control centre explodes according to previous spontaneous combustion judges discharge temperature, pressure
In power and CO content when any Indexes Abnormality, early warning is issued to control centre, as follows to the independent regulating step of each index:
B1, discharge temperature anomaly:
The temperature for reducing air preheater, temperature and discharge temperature at real-time monitoring hot-air mouth, after certain time,
After discharge temperature reaches normal value, stop adjusting the temperature of air preheater；
B2, discharge pressure are exceeded: temperature is related at the parameter and hot-air mouth, reduces the temperature of air preheater, real
When monitoring hot-air mouth at temperature and discharge pressure, after certain time, after discharge pressure reaches normal value, stop
The temperature of air preheater is adjusted；
B3, discharge CO content are exceeded:
Start the valve at the threeway port three at hot-air mouth, closes the valve at air preheater outlet, inert gas
Inert gas is passed into coal pulverizer by pipeline, is reduced CO and oxygen content ratio in coal pulverizer, is carried out inerting explosive operation；
In B4, three above index after discharge CO content is exceeded, no matter whether other two parameter is exceeded is adopted
With the 3rd kind of method of adjustment；
C, the anti-purge of sampling pipe is as follows: sampling pipe stops working, and closes the three-way connection exhaust tube on sampling pipe
Valve at road, opens blowback and sweeps the valve at pipeline and be passed through compressed air and purge to sampling pipe, is blown after a period of time
After sweeping completely, when another sampling pipe being waited to be up to coal dust accumulation, then restart.
3. beneficial effect
Using technical solution provided by the invention, compared with prior art, have the following beneficial effects:
(1) a kind of coal pulverizer of the invention is safely operated detection system, and import hot air pipe is equipped with hot blast temperature sensor,
Inert gas duct is connected to import hot air pipe, and discharge pipeline is equipped with sampling pipe, and raw coal entrance is equipped with raw coal entrance
Pressure sensor, hot blast temperature sensor, sampling pipe and raw coal inlet pressure transducer are connect with control centre.Control centre
Coal pulverizer inlet and outlet pressure, internal temperature and CO content are monitored, it is accurate to detect CO content in coal pulverizer, prevent coal pulverizer
Spontaneous combustion explosion；
(2) a kind of coal pulverizer of the invention is safely operated detection system, and force samples pipe is located at one in raw coal coal feeding pipe
End is equipped with raw coal inlet pressure transducer.Raw coal inlet pressure transducer detects raw coal inlet pressure and discharge pressure phase
Cooperation prevents coal pulverizer from spontaneous combustion explosion occurs by the control of control centre by coal pulverizer work in negative pressure state；
(3) a kind of coal pulverizer of the invention is safely operated detection system, and threeway port two is connected to air preheater, threeway
Port three is connected to inert gas duct, and air preheater preheats air, and inert gas is for adjusting inside coal pulverizer
The safe operating condition operation of coal pulverizer is realized in pressure and the explosion-proof effect of inertia；
(4) a kind of coal pulverizer of the invention is safely operated detection system, and sampling pipe is located at one end in discharge pipeline
It is equipped with pressure-temperature sensor, pressure-temperature sensor is connect with control centre.Pressure-temperature sensor detects discharge
Pressure and temperature, together with the pressure of coal pulverizer, control coal pulverizer be in negative pressure working condition, temperature condition meets normal fortune
Turn to require, guarantees coal pulverizer safe operation；
(5) a kind of coal pulverizer of the invention is safely operated detection system, and two sampling pipes are located in discharge pipeline
In same level.Two sampling pipes work alternatively, and sample the parameter value at discharge same position, guarantee that sampling pipe is real-time
Discharge CO content, pressure and temperature value are sampled, so that CO content is normal in coal pulverizer, coal pulverizer is normally safe；
(6) a kind of coal pulverizer of the invention is safely operated detection system, and air preheater entrance is located on air preheater,
Air preheater entrance is connected to air pipeline.Air preheater heats the air of air pipeline input, is passed into coal pulverizer,
The intake of hot-air is controlled by valve, so that the temperature and pressure inside coal pulverizer is controlled, so that coal pulverizer is in safety
Operating status；
(7) a kind of coal pulverizer of the invention is safely operated detection system, is equipped in Multistage filtering device and is successively arranged sampling
Pump, draining pump and solenoid valve, sampling pump, draining pump and solenoid valve connect with control centre, are filtered out by Multistage filtering device
Moisture and impurity can make the detection of CO content more accurate；
(8) a kind of coal pulverizer of the invention is safely operated detection system, and the interface that pipeline is connected to sampling pipe is swept in blowback
It is equipped with valve with the interface that pump-line is connected to sampling pipe, valve is connect with control centre.Control centre passes through valve
Control sweeps work to the blowback of sampling pipe, prevents sampling blockage；
(9) a kind of coal pulverizer of the invention is safely operated detection system, and the end face of inner tube is equipped with pressure-temperature sensor,
Pressure-temperature sensor includes pressure sensor and temperature sensor, and the pressure sensor and temperature sensor are respectively positioned on end
On face, it is connect with control centre.Inner tube is used for route cabling, and the setting of inner tube increases the service life of sampling pipe, is increased
The reliability of detection system；
(10) a kind of coal pulverizer of the invention is safely operated detection method, two sampling pipe alternating samplings, to realize that CO contains
Amount real-time detection is not rested, and is detected in real time to the operating condition of coal pulverizer, can protect coal pulverizer safe and reliable operation；
(11) a kind of coal pulverizer of the invention is safely operated detection method, passes through pressure, the temperature at control discharge
With CO content, CO and oxygen content ratio in coal pulverizer are reduced, inerting explosive operation control coal pulverizer is carried out and securely and reliably transports
Row.
Detailed description of the invention
Fig. 1 is the structural schematic diagram at import hot air pipe；
Fig. 2 is enlarged structure schematic diagram at discharge；
Fig. 3 is coal pulverizer structural schematic diagram；
Fig. 4 is raw coal inlet enlarged structure schematic diagram；
Fig. 5 is sampling pipe structural schematic diagram.
Label declaration in schematic diagram:
1, discharge pipeline；2, raw coal entrance；21, raw coal coal feeding pipe；3, coal pulverizer main body；4, import hot air pipe；5,
Sampling pipe；51, pressure-temperature sensor；52, filter device；53, pipeline is swept in blowback；54, pump-line；6, air preheater；
61, air preheater entrance；62, hot blast temperature sensor；71, threeway port one；72, threeway port two；73, threeway port
Three；8, inert gas duct；9, air pipeline；10, coal mill system；11, raw coal inlet pressure transducer.
Specific embodiment
To further appreciate that the contents of the present invention, in conjunction with accompanying drawings and embodiments, the present invention is described in detail.
Embodiment 1
In conjunction with Fig. 1,2,3,4 and 5, a kind of coal pulverizer of the present embodiment is safely operated detection system, including is located at coal pulverizer
On import hot air pipe 4, discharge pipeline 1 and raw coal entrance 2, further include inert gas duct 8, hot blast temperature sensor
62, sampling pipe 5 and raw coal inlet pressure transducer 11, import hot air pipe 4 are equipped with hot blast temperature sensor 62, inert gas tube
Road 8 is connected to import hot air pipe 4, and discharge pipeline 1 is equipped with sampling pipe 5, and raw coal entrance 2 is passed equipped with raw coal inlet pressure
Sensor 11, hot blast temperature sensor 62, sampling pipe 5 and raw coal inlet pressure transducer 11 are connect with control centre.
Hot blast temperature sensor 62 detects the temperature on import hot air pipe 4, and inert gas duct 8 is for adjusting in coal pulverizer
Portion's pressure and adjustment CO content, for detecting CO content, the raw coal on raw coal entrance 2 enters the sampling pipe 5 on discharge pipeline 1
Mouth pressure sensor 11 detects raw coal inlet pressure and feeds back to control centre, by the CO content of control centre's detection, import heat
Air temperature and raw coal inlet pressure level, and then coal pulverizer is controlled, prevent the spontaneous combustion of coal pulverizer from exploding.
Hot blast temperature sensor 62 is located on import hot air pipe 4, and by the hot wind effect of being brushed, coal dust is along discharge
Pipeline 1 is gone out, and the part for causing sampling pipe 5 to be located in discharge pipeline 1 is not easy to accumulate coal dust.If temperature sensor is placed on
Inside coal pulverizer, the movement of coal dust is easily damaged temperature sensor, and coal dust accumulation influences measurement accuracy；Hot blast temperature sensing
Device 62 is used to control the temperature of hot wind, and then realizes the control to coal pulverizer inside coal dust and gas temperature.
Embodiment 2
A kind of coal pulverizer of the present embodiment is safely operated detection system, is further improved on the basis of embodiment 1, coal-grinding
Machine further includes coal mill system 10 and coal pulverizer main body 3, and coal mill system 10 is located in coal pulverizer main body 3, and raw coal entrance 2 is located at coal-grinding
3 top of owner's body, is connected to by raw coal coal feeding pipe 21 with coal mill system 10, force samples pipe 22 passes through 21 side of raw coal coal feeding pipe
Wall, into raw coal coal feeding pipe 21, force samples pipe 22 is located at one end in raw coal coal feeding pipe 21 equipped with raw coal inlet pressure
Sensor 11, one end in discharge pipeline 1 are equipped with pressure-temperature sensor 51, and for anti-leakage of pulverized coal, coal pulverizer is used
Be negative pressure system, pressure sensor is laid in respectively at coal pulverizer entrance, and acquired effect has:
1, inlet gas pressure is detected, guarantees that the pressure in Mill Systems is greater than external pressure, is in system under negative pressure
Work；
2, real-time monitoring system pressure avoids outside air from leaking into, and Multivariable Coupling is caused to influence system stable operation；
3, real-time detection and guarantee entrance and exit pressure difference stablize, avoid because Mill Systems internal pressure change it is excessive, formed
Interference generates major accident.4, coal pulverizer entrance and exit pressure difference is used to monitor the coal load quantity in coal pulverizer, and pressure difference is larger, illustrates to grind
Coal load quantity is more in coal machine, otherwise coal load quantity is less, when the pressure difference of coal pulverizer entrance is lower than defined numerical value in operation, coal-grinding
Machine outlet temperature rises the risk exploded quickly and increases, and should increase coal-supplying amount at this time, turn down hot air disperser, opens big cold
Air door reduces pulverizer outlet temperature.
Embodiment 3
A kind of coal pulverizer of the present embodiment is safely operated detection system, is further improved on the basis of embodiment 1 or 2,
The inlet of import hot air pipe 4 is equipped with three-way connection, and three-way connection includes threeway port 1, threeway port 2 72 and three go sides
Mouth 3 73, threeway port 1 is connected to import hot air pipe 4, and threeway port 2 72 is connected to air preheater 6, threeway port three
73 are connected to inert gas duct 8.
Sampling pipe 5 passes through the side wall of discharge pipeline 1, is deep into discharge pipeline 1, sampling pipe 5 is located at coal dust
One end in outlet conduit 1 is equipped with pressure-temperature sensor 51, and pressure-temperature sensor 51 is connect with control centre.
Pressure-temperature sensor 51 acquires the temperature and pressure in discharge pipeline 1, is convenient for control centre's real-time monitoring
The state of coal pulverizer.
Embodiment 4
A kind of coal pulverizer of the present embodiment is safely operated detection system, further changes on the basis of embodiment 1,2 or 3
Into, sampling pipe 5 altogether there are two, two sampling pipes 5 are located in the same horizontal plane in discharge pipeline 1, to go out to coal dust
The CO content of mouth pipeline 1 carries out real-time uninterrupted sampling, realizes real-time monitoring coal pulverizer state, prevents coal pulverizer spontaneous combustion from exploding.
The pipeline that threeway port 2 72 is connected to air preheater 6 is equipped with hot blast temperature sensor 62 and valve, described
The pipeline that is connected to inert gas duct 8 of threeway port 3 73 be equipped with valve, valve is connect with control centre, air preheat
Device entrance 61 is located on air preheater 6, and air preheater entrance 61 is connected to air pipeline 9.
Embodiment 5
A kind of coal pulverizer of the present embodiment is safely operated detection system, further changes on the basis of embodiment 1,2,3 or 4
Into sampling pipe 5 is located at one end outside discharge pipeline 1 and is equipped with Multistage filtering device 52, sets in Multistage filtering device 52
It is successively arranged sampling pump, draining pump and solenoid valve, sampling pump, draining pump and solenoid valve are connect with control centre.
By the suction of sampling pump, moisture and impurity are filtered out using Multistage filtering device 52, only retains the gas containing CO
Body substance, convenient for detecting the accuracy of CO content.
Sampling channel be furnished with a sampling pump continuously run, by sampling pipe with 1.5 liters/min of capacity from probe
It is pumped into sample gas.Sample gas is cooled to 0-5 DEG C by refrigerator first, removes moisture therein.The condensation generated during this is by draining
Pump is discharged with the selected period.Sample gas carries out multistage filtrating smoke dust by Multistage filtering device later, and chemical filtering is effectively prevent
Sensor Poisoning.Any particulate matter for including in air or sample gas can all be filtered out by particulate filter.After analysis, exhaust gas
It is discharged by the exhaust outlet of chassis bottom.Draining pump and solenoid valve in Multistage filtering device 52 are connect with control centre.
Embodiment 6
A kind of coal pulverizer of the present embodiment is safely operated detection system, on the basis of embodiment 1,2,3,4 or 5 further
It improves, sampling pipe 5 sweeps pipeline 53 with blowback respectively and pump-line 54 is connected to, pipeline is swept in blowback after Multistage filtering device 52
The interface that 53 interfaces being connected to sampling pipe 5 and pump-line 54 are connected to sampling pipe 5 is equipped with valve, valve and control
Center connection.
Sampling pipe 5 is curve bend (belonging to non-standard sampling probe), and one end inside discharge pipeline 1 is opened
Upward, the end face 551 of interlayer casing inner tube 55 built in the sampling pipe 5, inner tube 55 is equipped with pressure-temperature sensor 51 to mouth,
Pressure-temperature sensor 51 includes pressure sensor 511 and temperature sensor 512, and the pressure sensor 511 and temperature pass
Sensor 512 is respectively positioned on end face 551, is connect with control centre.
Thickening processing is carried out to 5 lower part of sampling pipe, and 5 lower part of sampling pipe is arranged to bimetallic tube, (temperature passes by thermocouple
Sensor 512) and 511 cabling of pressure sensor be built in bimetallic tube (inner tube 55), main effect is:
1, coal dust is reduced to the erosive wear of sampling pipe 5；
2, cabling is sealed in bimetallic tube, is not easy to accumulate coal dust；
3, thermocouple is located on the section of bimetallic tube, when backwash, can rinse thermocouple surface dirt well；
4, thermocouple being capable of temperature in actual response discharge pipe.
Temperature sensor 512 is set at the discharge pipeline 1 of coal pulverizer:
1 and pressure, CO content share the same detection pipeline, make full use of existence conditions, reduce rectification, reduce cost,
Resource maximally utilizes, and the temperature in the same space, pressure and CO content have reference significance to analysis coal pulverizer state,
Control for subsequent coal pulverizer internal state；
2, coal dust be not easy to accumulate, more can actual response discharge temperature value.
Embodiment 7
A kind of coal pulverizer of the present embodiment is safely operated detection method, can be applicable in embodiment 1-6:
A, it constructs a kind of above-described coal pulverizer and is safely operated detection system；Raw coal inlet pressure transducer 11, hot wind
The signal that temperature sensor 62 and pressure-temperature sensor 51 will test is transported to control centre；
B, the empirical value summarized in the characteristic that control centre explodes according to previous spontaneous combustion judges discharge temperature, pressure
In power and CO content when any Indexes Abnormality, early warning is issued to control centre, as follows to the independent regulating step of each index:
B1, discharge temperature anomaly:
Reduce the temperature of air preheater 6, temperature and discharge temperature at real-time monitoring hot-air mouth, through certain time
Afterwards, after discharge temperature reaches normal value, stop adjusting the temperature of air preheater 6；
Hot blast temperature is excessively high, can aggravate the oxidation reaction of coal dust, increases CO content；Pulverizer outlet temperature is higher, coal
In the easier precipitation of volatile matter, be more easy to happen explosion accident
B2, discharge pressure are exceeded: temperature is related at the parameter and hot-air mouth, reduces the temperature of air preheater 6, real
When monitoring hot-air mouth at temperature and discharge pressure, after certain time, after discharge pressure reaches normal value, stop
The temperature of air preheater 6 is adjusted；(furthermore need to monitor control coal pulverizer inlet negative pressure, mainly so that coal pulverizer and whole
A pulverized coal preparation system is under negative pressure and runs, prevent coal dust from system imprecision outward spray and negative pressure operating condition under do not suck the external world
Cold wind)
B3, discharge CO content are exceeded:
Start the valve at the threeway port 3 73 at hot-air mouth, closes the valve in 6 exit of air preheater, indifferent gas
Inert gas is passed into coal pulverizer by body pipeline 8, is reduced CO and oxygen content ratio in coal pulverizer, is carried out the explosion-proof behaviour of inerting
Make；(the fire extinguishing interface that this inerting gas pipeline is alternatively arranged as the matched fire extinguishing system of pulverized coal preparation system).
In B4, three above index after discharge CO content is exceeded, no matter whether other two parameter is exceeded is adopted
With the 3rd kind of method of adjustment；
C, the anti-purge of sampling pipe 5 is as follows: sampling pipe 5 stops working, and closes at the pump-line 54 on sampling pipe 5
Valve, open blowback and sweep the valve at pipeline 53 and be passed through compressed air sampling pipe 5 is purged, purged after a period of time
After clean, when another sampling pipe 5 being waited to be up to coal dust accumulation, then restart.
Sampling pipe 5 is arranged to curve bend, coal pulverizer discharge pipeline tapping upward, with Fly ash sampling phase
Control static balance is not needed than, the present invention, and solid is under pressure influence, and of the invention measuring is CO gas content, is not pressurized
Power influences, it is only necessary to the flow velocity in sampling pipe 5 is controlled, so that CO gas enters sampling pipe；
The effect of two sampling pipes 5 is set at the discharge of coal pulverizer:
According to the time cycle that sampling mouth (positioned at the top of sampling pipe 5) blocks at discharge, when one of them is adopted
5 working time of sample pipe soon reaches the blocking period, i.e., when will influence pressure, temperature and CO content detection result, to another
Sampling pipe 5 first carries out blowback and sweeps, and then enables, and when 5 stable operation of sampling pipe, closes that samples mouth and will block
Sampling pipe 5 carries out blowback and sweeps, and repeatedly in this way, to realize that CO content real-time detection is not rested, carries out in real time to the operating condition of coal pulverizer
Detection, and then realize the purpose of protection.
By the hot wind effect of being brushed, coal dust is gone out along outlet, and sampling pipe 5 is caused to be located at the portion in discharge pipeline
Divide and is not easy to accumulate coal dust.Coal dust moisture is excessively high, and mobility is deteriorated, and nozzle is easily caused to block, and influences system normal operation；Coal dust water
It is point too low, spontaneous combustion, or even explosion are easily caused, is used for reference in spontaneous combustion of pulverized coal, coal dust moisture, temperature is too low, even if there is oxygen, coal dust
Activity is not high, and oxidation reaction is not violent enough, and temperature is high, and oxidation reaction is violent, and CO content rises, and coal dust moisture is excessively high, coal dust with
Oxygen reaction, the coal dust surface area contacted with oxygen is smaller, and CO content is lower；But when moisture is lower, coal dust is contacted with oxygen
Surface area is larger, and reaction acutely, and more, causes CO content higher, so having to control coal dust moisture in a certain suitable area
In, moisture is excessively high, and coal pulverizer coal chute road easily blocks, and coal dust easily agglomerates, and is not easy grinds, poor fluidity, and coal dust can not be arranged
Out, the coal-grinding efficiency of coal pulverizer reduces, and influences the stability of coal pulverizer.
Schematically the present invention and embodiments thereof are described above, description is not limiting, institute in attached drawing
What is shown is also one of embodiments of the present invention, and actual structure is not limited to this.So if the common skill of this field
Art personnel are enlightened by it, without departing from the spirit of the invention, are not inventively designed and the technical solution
Similar frame mode and embodiment, are within the scope of protection of the invention.
Claims (4)
1. a kind of coal pulverizer is safely operated detection system, including import hot air pipe (4), the discharge pipeline being located on coal pulverizer
(1) and raw coal entrance (2), which is characterized in that further include inert gas duct (8), hot blast temperature sensor (62), sampling pipe
(5) and raw coal inlet pressure transducer (11), import hot air pipe (4) are equipped with hot blast temperature sensor (62), inert gas tube
Road (8) is connected to import hot air pipe (4), and discharge pipeline (1) is equipped with sampling pipe (5), and raw coal entrance (2) is equipped with raw coal
Inlet pressure transducer (11), hot blast temperature sensor (62), sampling pipe (5) and raw coal inlet pressure transducer (11) with control
Center connection processed, raw coal entrance (2) are located above coal pulverizer main body (3), and sampling pipe (5) is deep into discharge pipeline (1)；
The sampling pipe (5) passes through the side wall of discharge pipeline (1), is deep into discharge pipeline (1), sampling pipe
(5) one end being located in discharge pipeline (1) is equipped with pressure-temperature sensor (51), pressure-temperature sensor (51) and control
Center connection processed；
Sampling pipe (5) is located at the external one end of discharge pipeline (1) and is equipped with Multistage filtering device (52), Multistage filtering device
(52) sampling pump, draining pump and solenoid valve are successively arranged in, sampling pump, draining pump and solenoid valve are connect with control centre；
The inlet of the import hot air pipe (4) is equipped with three-way connection, and three-way connection includes threeway port one (71), three go sides
Two (72) of mouth and threeway port three (73), threeway port one (71) are connected to import hot air pipe (4), threeway port two (72) and sky
Air preheater (6) connection, threeway port three (73) is connected to inert gas duct (8)；
The pipeline that the threeway port two (72) is connected to air preheater (6) is equipped with hot blast temperature sensor (62) and valve
Door, the pipeline that the threeway port three (73) is connected to inert gas duct (8) are equipped with valve, and valve and control centre connect
It connects, air preheater entrance (61) is located on air preheater (6), and air preheater entrance (61) is connected to air pipeline (9)；
Sampling pipe (5) sweeps pipeline (53) with blowback respectively and pump-line (54) is connected to, blowback after Multistage filtering device (52)
It sweeps the interface that pipeline (53) is connected to sampling pipe (5) and the interface that pump-line (54) is connected to sampling pipe (5) is equipped with
Valve, valve are connect with control centre；
The sampling pipe (5) is curve bend, be located at discharge pipeline (1) it is internal it is open at one end upward, described adopts
The end face (551) of inner tube (55) built in sample pipe (5), inner tube (55) is equipped with pressure-temperature sensor (51), pressure and temp sensing
Device (51) includes pressure sensor (511) and temperature sensor (512), the pressure sensor (511) and temperature sensor
(512) it is respectively positioned on end face (551), is connect with control centre.
2. a kind of coal pulverizer according to claim 1 is safely operated detection system, which is characterized in that the coal pulverizer is also
Including coal mill system (10) and coal pulverizer main body (3), coal mill system (10) is located in coal pulverizer main body (3), raw coal entrance (2) position
It above coal pulverizer main body (3), is connected to by raw coal coal feeding pipe (21) with coal mill system (10), force samples pipe (22) passes through original
Coal coal feeding pipe (21) side wall, interior into raw coal coal feeding pipe (21), force samples pipe (22) is located at one in raw coal coal feeding pipe (21)
End is equipped with raw coal inlet pressure transducer (11).
3. a kind of coal pulverizer according to claim 1 is safely operated detection system, which is characterized in that the sampling pipe
(5) there are two altogether, two sampling pipes (5) are located in the same horizontal plane in discharge pipeline (1).
4. a kind of coal pulverizer is safely operated detection method, it is characterised in that:
A, any coal pulverizer of building claim 1-3 is safely operated detection system；Raw coal inlet pressure transducer (11),
The signal that hot blast temperature sensor (62) and pressure-temperature sensor (51) and sampling pipe (5) will test is transported in control
The heart；
B, the empirical value summarized in the characteristic that control centre explodes according to previous spontaneous combustion, judge discharge temperature, pressure and
In CO content when any Indexes Abnormality, early warning is issued to control centre, as follows to the independent regulating step of each index:
B1, discharge temperature anomaly:
Reduce the temperature of air preheater (6), temperature and discharge temperature at the hot-air mouth of real-time monitoring coal pulverizer, through certain section
After time, after discharge temperature reaches normal value, stop adjusting the temperature of air preheater (6)；
B2, discharge pressure are exceeded: temperature is related at the parameter and hot-air mouth, reduces the temperature of air preheater (6), in real time
Temperature and discharge pressure at hot-air mouth are monitored, after certain time, after discharge pressure reaches normal value, stopping pair
The temperature of air preheater (6) is adjusted；
B3, discharge CO content are exceeded:
Start the valve at the threeway port three (73) at hot-air mouth, closes the valve in air preheater (6) exit, indifferent gas
Inert gas is passed into coal pulverizer by body pipeline (8), reduces CO and oxygen content ratio in coal pulverizer, it is explosion-proof to carry out inerting
Operation；
In B4, three above index after discharge CO content is exceeded, no matter whether other two parameter is exceeded is all made of B3
Method of adjustment；
C, the anti-purge of sampling pipe (5) is as follows: sampling pipe (5) stops working, and closes the pump-line on sampling pipe (5)
(54) valve at, opens blowback and sweeps the valve at pipeline (53) and be passed through compressed air and purge to sampling pipe (5), by one
After section time purging is clean, when another sampling pipe (5) being waited to be up to coal dust accumulation, then restart.
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| CN201710344739.8A CN106964474B (en) | 2017-05-16 | 2017-05-16 | A kind of coal pulverizer explosive-proof test system |
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|---|---|---|---|---|
| CN109127104A (en) * | 2018-09-13 | 2019-01-04 | 华润电力湖南有限公司 | Coal pulverizer and its coal pulverizer hot air duct |
| CN109696524B (en) * | 2019-01-15 | 2023-11-24 | 华电电力科学研究院有限公司 | Coal mill outlet O for explosion prevention 2 Online monitoring device and use method |
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| CN112237966B (en) * | 2020-09-27 | 2021-11-19 | 广东通德电力工程有限公司 | Coal pulverizer coal powder sampler of intelligence |
| CN114308274A (en) * | 2021-11-08 | 2022-04-12 | 广西投资集团北海发电有限公司 | Safe operation method for BBD4060 double-inlet and double-outlet direct-blowing type steel ball-milling lignite |
| CN116273414B (en) * | 2023-02-17 | 2024-07-12 | 华能曲阜热电有限公司 | Coal pulverizer cold air duct temperature monitoring alarm system |
| CN116037301B (en) * | 2023-03-07 | 2023-06-13 | 北京博数智源人工智能科技有限公司 | Deflagration fault position identification method and system for coal mill of thermal power station |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3823877A (en) * | 1972-06-05 | 1974-07-16 | J Poggie | Apparatus and process for reducing waste organic materials into clean, sterilized powder, meal or flakes |
| CN201304356Y (en) * | 2008-11-27 | 2009-09-09 | 武汉钢铁(集团)公司 | Temperature-control blast furnace coal powder preparation system |
| JP2014114994A (en) * | 2012-12-07 | 2014-06-26 | Nippon Steel & Sumitomo Metal | Device and method for temperature control of crushing plant, and computer program |
| CN103920578A (en) * | 2013-01-14 | 2014-07-16 | 安徽华电宿州发电有限公司 | Measurement method of coal mill entrance ventilation quantity |
| CN106423526A (en) * | 2016-11-29 | 2017-02-22 | 柴庆宣 | Intelligent control method of steel ball coal mill wind system and module |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| IN166429B (en) * | 1986-04-29 | 1990-05-05 | Babcock & Wilcox Co | |
| CN1173612A (en) * | 1996-12-06 | 1998-02-18 | 华北电力大学（北京） | Coal powder self-firing and self-explosion monitoring and forecasting system |
| JP5710149B2 (en) * | 2010-04-08 | 2015-04-30 | 株式会社神戸製鋼所 | Coal grinding method |
| CN203635303U (en) * | 2013-11-29 | 2014-06-11 | 海拉尔蒙西水泥有限公司 | Security explosion preventing device of coal milling system |
| CN104771852B (en) * | 2015-04-03 | 2018-07-24 | 煤科院节能技术有限公司 | A kind of coal dust pot inert gas protection device and its application method |
| CN104801416B (en) * | 2015-04-23 | 2017-11-28 | 东南大学 | Novel coal mill outlet temperature control system and its control method |
| CN105170296B (en) * | 2015-10-23 | 2018-04-17 | 河南省锅炉压力容器安全检测研究院 | A kind of pulverized coal preparation system fine explosion protection system of complete period inerting |
| CN206778675U (en) * | 2017-05-16 | 2017-12-22 | 安徽工业大学 | A kind of coal pulverizer explosive-proof test system |
-
2017
- 2017-05-16 CN CN201810057316.2A patent/CN108237010B/en active Active
- 2017-05-16 CN CN201710344739.8A patent/CN106964474B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3823877A (en) * | 1972-06-05 | 1974-07-16 | J Poggie | Apparatus and process for reducing waste organic materials into clean, sterilized powder, meal or flakes |
| CN201304356Y (en) * | 2008-11-27 | 2009-09-09 | 武汉钢铁(集团)公司 | Temperature-control blast furnace coal powder preparation system |
| JP2014114994A (en) * | 2012-12-07 | 2014-06-26 | Nippon Steel & Sumitomo Metal | Device and method for temperature control of crushing plant, and computer program |
| CN103920578A (en) * | 2013-01-14 | 2014-07-16 | 安徽华电宿州发电有限公司 | Measurement method of coal mill entrance ventilation quantity |
| CN106423526A (en) * | 2016-11-29 | 2017-02-22 | 柴庆宣 | Intelligent control method of steel ball coal mill wind system and module |
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| CN108237010A (en) | 2018-07-03 |
| CN106964474B (en) | 2018-04-20 |
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