CN101694447B - Boiler fly ash ignition carbon measuring device - Google Patents
Boiler fly ash ignition carbon measuring device Download PDFInfo
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- CN101694447B CN101694447B CN2009102328255A CN200910232825A CN101694447B CN 101694447 B CN101694447 B CN 101694447B CN 2009102328255 A CN2009102328255 A CN 2009102328255A CN 200910232825 A CN200910232825 A CN 200910232825A CN 101694447 B CN101694447 B CN 101694447B
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Abstract
The invention discloses a boiler fly ash ignition carbon measuring device, which comprises a sample feeding component, an ignition component, a transmission component, a sample weighing component, a sample discharge component and a crucible supporting plate. Crucible holes are arranged on the crucible supporting plate; the center of the crucible supporting plate is fixed to the top end of a pull rod passing through a station platform; a synchronizing wheel is arranged on the pull rod disposed between the crucible supporting plate and the station platform; a transposition motor fixed under the station platform is connected with the synchronizing wheel via a synchronizing belt; a sample feeding station, an ignition station, a sample weighing station and a sample discharge station are sequentially arranged on the station platform; the sample feeding component, the ignition component and the sample discharge component are respectively positioned above the sample feeding station, the ignition station and the sample discharge station; and the sample weighing component is positioned below the sample weighing station. By installing an electric scale below the station platform, the carbon measuring device enables the length of a weighing rod to be shortened heavily, enables the anti-vibration capability of the weighing rod to be strengthened greatly, and then improves measurement accuracy. Additionally, the crucible supporting plate is a strip-shaped plate with two through holes capable of holding a crucible, has simple structure, small rotation inertia, and is favorable for controlling accuracy of rotation.
Description
Technical field
The present invention relates to a kind of device of measuring the boiler fly ash carbon content, is a kind of boiler fly ash ignition carbon measuring device specifically.
Background technology
The boiler flyash carbon content size is one of leading indicator of fuel-burning power plant coal-burning boiler burning efficiency and performance driving economy.In time grasp the boiler flyash carbon content data, help the adjustment that the power plant boiler operations staff in time carries out boiler combustion and pulverized coal preparation system, improve boiler combustion efficiency, reduce gross coal consumption rate, improve utilization of coal ash and be worth.
At present, the general both at home and abroad online carbon determination method of flying dust that adopts has microwave method, infrared method and capacitance method.These measuring methods all are to belong to the indirect method of measurement, and all contrast obtains its measurement data according to the preprepared calibration curve.Because coal changes or fineness of pulverized coal changes, and the flying dust physical characteristics is changed, thereby cause original calibration curve no longer suitable.And rich coal resources in China, thermal power plant is complicated with the coal source, the existing online carbonmeter of flying dust can not satisfy power plants and use the changeable reality of coal, and the data that provide often mislead the judgement that the boiler operatiopn personnel adjust boiler combustion, have a strong impact on the boiler combustion economy.
And current experiments chamber off-line assay method needs hand sampling, artificial scale sample, high temperature sintering, and then manually weighs, calculates, whole process generally needs 2-3 hour, seriously lags behind owing to detect data, and the data volume wretched insufficiency, therefore, can not in time instruct the boiler combustion adjustment.The patent No. is that 200610126404.0 Chinese invention patent discloses a kind of on-line testing device of carbon content in flying ashes in boiler flue for coal power station, this device can carry out on-line measurement, but still have following defective: 1, electronic balance is installed in the measure case bottom, for weight that can the weighing crucible, weighing bar must be very long, and the center of gravity of the whole like this bar of weighing is very high, in case cabinet has a little vibrations, the bar of weighing will significantly rock, thereby influences measuring accuracy.2, crucible rotating disk circumference is provided with four or more through hole that is used to shelve loaded crucible equably.Such structure is more complicated in measuring flow process, if four crucibles all add measuring process, then comes out to measurement result from collecting ash sample, and the whole measurement flow process time is longer, and it is big to cause the measurement result data to lag behind.3, crucible is to be driven canine tooth wheel disc and crucible rotating disk and rotated by electric rotating machine, and needs two alignment sensors, complex structure, and fault is more.4, ash sample needs long burning time in the calcination parts.
Summary of the invention
Goal of the invention: the objective of the invention is to overcome the deficiencies in the prior art, a kind of boiler fly ash ignition carbon measuring device is provided, has overcome the deficiency that existing flying dust carbonmeter exists, accuracy of detection height, speed are fast, good reproducibility can satisfy the requirement that the user in time adjusts for boiler combustion.
Technical scheme: in order to solve the problems of the technologies described above, the present invention has adopted following technical scheme:
A kind of boiler fly ash ignition carbon measuring device, it comprises application of sample parts, calcination parts, transfer member, scale sample parts and stock layout parts; Also comprise the crucible supporting plate, on the crucible supporting plate, be provided with crucible hole; The central point of crucible supporting plate is fixed on the top of pull bar, and pull bar passes the station platform; Be provided with synchronizing wheel on the pull bar between crucible supporting plate and the station platform, the transposition motor that is fixed under the station platform links to each other with synchronizing wheel by being with synchronously; On the station platform, press four manhole stations of circumferencial direction distribution, be followed successively by: application of sample station, calcination station, scale sample station and stock layout station, and the center of circle of four manholes is positioned on the circumference of same radius; The application of sample parts are positioned at the top of application of sample station, and the calcination parts are positioned at the top of calcination station, and scale sample parts are positioned under the scale sample station, and the stock layout parts are positioned at the top of stock layout station.
Preferably, described crucible supporting plate is an elongated plates, respectively is provided with a crucible hole adaptive with crucible at the two ends of described elongated plates.
Preferably, described scale sample parts comprise scale sample bar, electronic balance, and electronic balance is fixed on below the station platform; Scale sample bar is fixed on the weighing plate of electronic balance; Scale sample bar vertically passes the center of scale sample station, and stretches out the upper surface of station platform.
Preferably, the present invention also comprises system oxygen parts, and described system oxygen parts link to each other with the calcination parts by tracheae.
Preferably, described system oxygen parts are the molecular sieve oxygen generation device.
The course of work: the flying dust sample is added in the crucible, after the sample part weighing by the application of sample parts; The crucible that ash sample will be housed by transfer member is sent into the calcination parts, and calcination is about 10 minutes under 815 ℃ ± 10 ℃ temperature; After withdrawing from the burner hearth cooling then, by scale sample parts weighing crucible ash sample weight, calculate the ash sample mass loss automatically by instrument, thereby calculate the carbon content of flying dust sample once more; The ash sample of measuring is cleared out of crucible by the stock layout parts, carries out the measurement of next ash sample then.
Beneficial effect: (1) the present invention is installed in station platform below with electronic balance, thereby the length of the feasible bar of weighing significantly shortens, and the anti-vibration ability is strengthened greatly, thereby has improved measuring accuracy greatly.(2) crucible supporting plate of the present invention is to have two stripe board that can shelve the crucible through hole, and structure is simplified more, and rotator inertia is little, helps rotating control accuracy, and the measurement result time lag is little.(3) the present invention adopts the step motor drive synchronizing wheel to drive the crucible tray disc spins, and only needs a position transducer, and simple for structure, control accuracy is higher.(4) the present invention increases system oxygen parts in the calcination parts, and ash sample instrument when the heating calcination intermittently adds oxygen in the resistance furnace burner hearth, can quicken the oxidation of uncompleted burned carbon in the ash sample, thereby shorten Measuring Time.Described system oxygen parts are a kind of molecular sieve oxygen generation devices, need not to use chemical reagent, and are safe in utilization, Maintenance free.
Description of drawings
Fig. 1 is a structural representation of the present utility model.
Fig. 2 is the left view of Fig. 1.
Fig. 3 is a station arrangenent diagram of the present invention.
Fig. 4 is in the synoptic diagram of scale sample station for the present invention.
Fig. 5 is in the synoptic diagram of application of sample station for the present invention.
Fig. 6 is in the synoptic diagram of calcination and stock layout station for the present invention.
Fig. 7 is the structural representation of pull bar of the present invention.
Fig. 8 is the vertical view of Fig. 7.
Embodiment:
Shown in Fig. 1,2,3,4,5 and 6, boiler fly ash ignition carbon measuring device of the present invention comprises crucible supporting plate 1, transfer member, application of sample parts, calcination parts, scale sample parts, stock layout parts, station platform and electric control system.
Press four manholes of circumferencial direction distribution on the described station platform 3,, and the center of circle of four manholes is positioned on the circumference of same radius; Be arranged in order clockwise and be application of sample station 6, calcination station 7, scale sample station 8 and stock layout station 9.Wherein, application of sample parts 10 be positioned at application of sample station 6 directly over, stock layout parts 11 be positioned at stock layout station 9 directly over, the calcination parts be positioned at calcination station 7 directly over, scale sample parts are positioned under the scale sample station 8.
Crucible supporting plate 1 is an elongated plates, be provided with two identical big or small crucible hole A and B at the two ends of crucible supporting plate 1, crucible hole is a manhole, and the center of circle in the center of circle of manhole and station hole is concentric circles and distributes, the diameter of crucible hole is littler than the maximum outer rim of crucible, and is bigger than the center pot body of crucible; A crucible and No. two crucibles are placed on respectively in these two crucible holes.One end of crucible supporting plate 1 is provided with the projection adaptive with rotational position sensor 19, and when this projection was positioned at rotational position sensor 19, two crucibles on the crucible supporting plate 1 were just corresponding on corresponding station.
Described transfer member comprises pull bar 2, transposition motor 5, hoistable platform 12, lifting motor 13, application of sample push rod 14, stock layout push rod 15, leading screw 16 and calcination push rod 25.The center fixation of crucible supporting plate 1 is on pull bar 2, and pull bar 2 passes station platform 3 and hoistable platform 12, and hoistable platform 12 is between station platform 3 and bottom platform 17.And the end of pull bar 2 is fixed with baffle plate; On the pull bar 2 between crucible supporting plate 1 and the station platform 3, be provided with spring.When lifting motor 13 drove hoistable platform 12 declines, because the effect of the baffle plate of pull bar 2 ends, pull bar 2 drove crucible supporting plates 1 and descends; In the time of lifting motor 13 reverse rotations, drive hoistable platform 12 and rise, at this moment, because the effect of the spring of pull bar 2 upper ends, by elastic force drive crucible tray plate 1 rising of spring.Transposition motor 5 is fixed on station platform 3 belows; Transposition motor 5 links to each other with synchronizing wheel 4 by band synchronously, and synchronizing wheel 4 is fixed on the pull bar 2 of top of station platform 3, between synchronizing wheel 4 and the pull bar 2 for keyway cooperates, shown in Fig. 6 and 7.Transposition motor 5 drives 1 rotation of crucible supporting plate, and crucible is delivered on the corresponding station.
Application of sample push rod 14, stock layout push rod 15, calcination push rod 25 are housed on the hoistable platform 12, the position of these push rods is consistent with the center pit position of application of sample station 6, stock layout station 9, calcination station 7 respectively, and follow the rising of hoistable platform 12, can both pass the corresponding station through hole on the station platform 3 from the bottom up, the diameter of these push rods is littler than the aperture of the crucible through hole on the crucible supporting plate 1.
Described calcination parts comprise resistance furnace 20, temperature sensor 21, and resistance furnace 20 comprises thermal insulator and is located at intrinsic electric furnace heating wire.Resistance furnace 20 vertically be arranged in calcination station 7 directly over, the burner hearth of resistance furnace 20 is a hollow cylinder, the burner hearth blind end up, the burner hearth openend is down over against calcination station 7.Temperature sensor 21 is positioned at the burner hearth middle position, and the cylindrical burner hearth opening size of resistance furnace 20 is bigger than the external diameter of crucible.Oxygenerator 27 leads to the lower furnace portion opening part of resistance furnace 20 by tracheae 28, is used for when calcination to the burner hearth delivering oxygen; Described system oxygen parts are the molecular sieve oxygen generation device.
Described scale sample parts comprise scale sample bar 22 and electronic balance 23; Electronic balance 23 be fixed on station platform 3 below, the bottom of scale sample bar 22 is fixed on the weighing plate of electronic balance 23.Scale sample bar 22 vertically passes the center of scale sample station 8, and stretches out on the station platform 3, does not have Mechanical Contact between scale sample bar 22 and the station platform 3.The top of scale sample bar 22 is provided with the end face adaptive with crucible bottom.
Described crucible is the pot body that heat-stable ceramic is made, and there is a round boss crucible opening outside, and the bottom outside of crucible is inverted cone shape.
Described rotational position sensor 19, temperature sensor 21, lifting position sensor 24 are controlled by electric control unit (as PLC, computing machine); Come by the signal collection that control system is sent sensor here, by analysis and handle, be used for the heating of controlling resistance stove, the rotation of lifting motor, the start-stop of transposition motor, and and the data communication of electronic balance.
The concrete course of work of the present invention is as follows:
Method one: have only a crucible to participate in measuring.
1, in two crucible holes of A, the B of crucible supporting plate, places two dryings, intact empty crucible respectively: a crucible, No. two crucibles.Open instrument power source, operation calcination parts; Make resistance furnace temperature rise to 815 ℃ ± 10 ℃, and about 30 minutes of preheating.
2, lifting motor drives hoistable platform decline, and hoistable platform drives pull bar and the crucible supporting plate moves down, and when arriving lifting sensor position, instrument is noted initial lifting position automatically: the L position; Lifting motor begins opposite spin then, drives hoistable platform and rises to free height: the M position.The crucible supporting plate is also because the strength of synchronizing wheel top spring also returns to original height.
The rotation under transposition motor and band driving synchronously of crucible supporting plate, rotational position sensor constantly detects the position of rotation of crucible supporting plate, and instrument is write down initial position of rotation automatically then.
3, transposition motor-driven crucible supporting plate rotation when a crucible arrives scale sample station, is stopped the rotation.Lifting motor driving hoistable platform drops to the L position and stops, and this moment, a crucible dropped on the scale sample bar, and electronic balance begins weighing, and instrument obtains the quality ma0 of an empty crucible.
4, lifting motor drives hoistable platform and rises to the M position, the rotation of the motor-driven that replaces then crucible supporting plate, when arriving the application of sample station, a crucible stops, lifting motor drives hoistable platform and rises, rise to when fitting and stop when the application of sample push rod holds up crucible with the application of sample feature bottom, this moment hoistable platform height and position: the H position, the application of sample parts join a certain amount of ash sample in crucible then.
5, lifting motor driving hoistable platform drops to the M position, the rotation of the motor-driven that replaces then crucible supporting plate, when arriving scale sample station, a crucible stops, lifting motor drives hoistable platform and drops to the L position, No. one crucible drops on the scale sample bar, electronic balance begins weighing, and instrument obtains the quality ma1 of a crucible adding ash sample.
6, lifting motor drives hoistable platform and rises to the M position, the rotation of the motor-driven that replaces then crucible supporting plate, when arriving the calcination station, a crucible stops, lifting motor drives hoistable platform and rises to the H position, the push rod of calcination simultaneously holds up a crucible and rises in the resistance furnace burner hearth, fire box temperature is controlled in 815 ℃ ± 10 ℃, about 10 minutes of crucible calcination in resistance furnace; Make intermittently aerating oxygen in the resistance furnace burner hearth of oxygen parts 27 during the calcination.
7, lifting motor driving hoistable platform drops to the M position, after No. one crucible cools off about 1 minute, the rotation of transposition motor-driven crucible supporting plate, when arriving scale sample station, a crucible stops, lifting motor drives hoistable platform and drops to the L position, a crucible drops on the scale sample bar simultaneously, and electronic balance begins weighing, and instrument obtains the quality ma2 after the crucible calcination.
8, lifting motor drives hoistable platform and rises to the M position, the rotation of the motor-driven that replaces then crucible supporting plate, when arriving the ash discharge station, a crucible stops, lifting motor drives hoistable platform and rises to the H position, simultaneously the stock layout push rod holds up that crucible rises to and the stock layout feature bottom is fitted, and the stock layout parts are removed away the ash sample in crucible.
9, the carbon content percentage formula of ash sample is (ma1-ma2)/(ma1-ma0) * 100%, and instrument calculates the unburned carbon in flue dust value automatically.
The process of step 3-9 in the repetition methods one.
Method two: a crucible and No. two crucibles participate in measuring simultaneously.
Step 1-3 is with the step 1-3 in the method one.
4, lifting motor drives hoistable platform and rises to the M position, the rotation of the motor-driven that replaces then crucible supporting plate, when arriving the application of sample station, a crucible stops, lifting motor drives hoistable platform and rises to the H position, simultaneously the application of sample push rod holds up that crucible rises to and the application of sample feature bottom is fitted, and the application of sample parts join a certain amount of ash sample in crucible then.
5, lifting motor driving hoistable platform drops to the M position, the rotation of the motor-driven that replaces then crucible supporting plate, when arriving scale sample station, a crucible stops, lifting motor drives hoistable platform and drops to the L position, this moment, a crucible dropped on the scale sample bar, electronic balance begins weighing, and instrument obtains the quality ma1 of a crucible adding ash sample.
6, lifting motor drives hoistable platform and rises to the M position, the rotation of the motor-driven that replaces then crucible supporting plate, when arriving the calcination station, a crucible stops, lifting motor drives hoistable platform and rises to the H position, the push rod of calcination simultaneously holds up a crucible and rises in the resistance furnace burner hearth, fire box temperature is controlled in 815 ℃ ± 10 ℃, about 10 minutes of crucible calcination in resistance furnace.Simultaneously the stock layout push rod holds up that No. two crucibles rise to and the stock layout feature bottom is fitted, and the ash sample in No. two crucibles is removed away in the work of stock layout parts.
7, lifting motor driving hoistable platform drops to the M position, after No. one crucible cools off about 1 minute; The rotation of transposition motor-driven crucible supporting plate stops when a crucible arrives scale sample station, and lifting motor drives hoistable platform and drops to the L position, and a crucible drops on the scale sample bar simultaneously, and electronic balance begins weighing, and instrument obtains the quality ma2 after the crucible calcination.
8, according to the carbon content percentage formula (ma1-ma2)/(ma1-ma0) * 100% of ash sample, instrument calculates the unburned carbon in flue dust value in the crucible automatically No. one.
9, lifting motor drives hoistable platform and rises to the M position, and the rotation of the motor-driven that replaces then crucible supporting plate when No. two crucibles arrive scale sample station, is stopped the rotation.Lifting motor driving hoistable platform drops to the L position and stops, and this moment, No. two crucibles dropped on the scale sample bar, and electronic balance begins weighing, and instrument obtains the weight mb0 of No. two empty crucibles.
10, lifting motor drives hoistable platform and rises to the M position, the rotation of the motor-driven that replaces then crucible supporting plate, when arriving the application of sample station, No. two crucibles stop, lifting motor drives hoistable platform and rises to the H position, simultaneously the application of sample push rod holds up that No. two crucibles rise to and the application of sample feature bottom is fitted, and the application of sample parts join a certain amount of ash sample in No. two crucibles then.
11, lifting motor driving hoistable platform drops to the M position, the rotation of the motor-driven that replaces then crucible supporting plate, when arriving scale sample station, No. two crucibles stop, lifting motor drives hoistable platform and drops to the L position, this moment, No. two crucibles dropped on the scale sample bar, electronic balance begins weighing, and instrument obtains the quality mb1 of No. two crucible adding ash samples.
12, lifting motor drives hoistable platform and rises to the M position, the rotation of the motor-driven that replaces then crucible supporting plate, when arriving the calcination station, No. two crucibles stop, lifting motor drives hoistable platform and rises to the H position, the push rod of calcination simultaneously holds up No. two crucibles and rises in the resistance furnace burner hearth, fire box temperature is controlled in 815 ℃ ± 10 ℃, about 10 minutes of No. two crucible calcinations in resistance furnace.Simultaneously the stock layout push rod holds up that crucible rises to and the stock layout feature bottom is fitted, and the ash sample in crucible is removed away in the work of stock layout parts; Make intermittently aerating oxygen in the resistance furnace burner hearth of oxygen parts 27 during the calcination.
13, lifting motor driving hoistable platform drops to the M position, after No. two crucible cools off about 1 minute, the rotation of transposition motor-driven crucible supporting plate, when arriving scale sample station, No. two crucibles stop, lifting motor drives hoistable platform and drops to the L position, No. two crucibles drop on the scale sample bar simultaneously, and electronic balance begins weighing, and instrument obtains the quality mb2 after No. two crucible calcinations.
14, according to the carbon content percentage formula (mb1-mb2)/(mb1-mb0) * 100% of ash sample, instrument calculates the unburned carbon in flue dust value in the crucible automatically No. two.
15, the process of step 4-14 in the repetition methods two.
Method two has improved the operation work efficiency of device, has saved Measuring Time.
Claims (5)
1. boiler fly ash ignition carbon measuring device, it is characterized in that: it comprises application of sample parts, calcination parts, transfer member, scale sample parts and stock layout parts; Also comprise crucible supporting plate (1), on crucible supporting plate (1), be provided with crucible hole; The central point of crucible supporting plate (1) is fixed on the top of pull bar (2), and pull bar (2) passes station platform (3); Be provided with synchronizing wheel (4) on the pull bar (2) between crucible supporting plate (1) and the station platform (3), the transposition motor (5) that is fixed under the station platform (3) links to each other with synchronizing wheel (4) by being with synchronously;
Upward press four manhole stations of circumferencial direction distribution at station platform (3), be followed successively by: application of sample station (6), calcination station (7), scale sample station (8) and stock layout station (9), and the center of circle of four manholes is positioned on the circumference of same radius; Application of sample parts (10) are positioned at the top of application of sample station (6), and the calcination parts are positioned at the top of calcination station (7), and scale sample parts are positioned under the scale sample station (8), and stock layout parts (11) are positioned at the top of stock layout station (9).
2. a kind of boiler fly ash ignition carbon measuring device according to claim 1 is characterized in that: described crucible supporting plate (1) is an elongated plates, respectively is provided with a crucible hole adaptive with crucible at the two ends of described elongated plates.
3. a kind of boiler fly ash ignition carbon measuring device according to claim 1 is characterized in that: described scale sample parts comprise scale sample bar (22), electronic balance (23), and electronic balance (23) is fixed on below the station platform (3); Scale sample bar (22) is fixed on the weighing plate of electronic balance (23); Scale sample bar (22) vertically passes the center of scale sample station (8), and stretches out the upper surface of station platform (3).
4. a kind of boiler fly ash ignition carbon measuring device according to claim 1 is characterized in that: it also comprises system oxygen parts (27), and described system oxygen parts (27) link to each other with the calcination parts by tracheae (28).
5. a kind of boiler fly ash ignition carbon measuring device according to claim 4 is characterized in that: described system oxygen parts (27) are the molecular sieve oxygen generation device.
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| CN2009102328255A CN101694447B (en) | 2009-10-20 | 2009-10-20 | Boiler fly ash ignition carbon measuring device |
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| CN108146665B (en) * | 2017-11-07 | 2020-01-17 | 远光智和卓源(北京)科技有限公司 | Automatic coal sample adding device |
| CN108398353A (en) * | 2018-06-07 | 2018-08-14 | 马鞍山钢铁股份有限公司 | A kind of ash sample transport mechanism of the carbon containing amount detecting device based on three-axis robot |
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| CN110790188B (en) * | 2019-11-08 | 2020-09-11 | 北京理工大学 | Rotary lifting type cantilever crucible transfer mechanism with accurate positioning function |
| CN114720318B (en) * | 2022-04-24 | 2024-04-12 | 华中科技大学 | Automatic thermal weight loss detection device and system |
| CN117303720B (en) * | 2023-09-26 | 2024-03-12 | 廊坊赫尔劳斯太阳能光伏有限公司 | Forming equipment and production method of quartz crucible |
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| CN201508306U (en) * | 2009-10-20 | 2010-06-16 | 南京大得科技有限公司 | Carbon testing device by firing fly ash of boiler |
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| CN201508306U (en) * | 2009-10-20 | 2010-06-16 | 南京大得科技有限公司 | Carbon testing device by firing fly ash of boiler |
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