CN105115852A - Highest inherent moisture determining instrument and method for coal - Google Patents
Highest inherent moisture determining instrument and method for coal Download PDFInfo
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- CN105115852A CN105115852A CN201510567351.5A CN201510567351A CN105115852A CN 105115852 A CN105115852 A CN 105115852A CN 201510567351 A CN201510567351 A CN 201510567351A CN 105115852 A CN105115852 A CN 105115852A
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Abstract
The invention discloses a highest inherent moisture determining instrument and method for coal. The determining instrument comprises a heat-preservation bin, wherein a constant-temperature humidity adjusting bin is arranged in the heat-preservation bin; the heat-preservation bin is connected with a closed water pipe; the water pipe is connected with a water pump and a switch; water enters the heat-preservation bin and flows in the heat-preservation bin in a circulation manner by adjusting the water pump and the switch, and immerses the constant-temperature humidity adjusting bin; the bottom of the constant-temperature humidity adjusting bin is filled with a potassium sulphate saturated solution; a sample frame is arranged in the constant-temperature humidity adjusting bin; and when a determining test is performed, the heat-preservation bin and the constant-temperature humidity adjusting bin are closed. The constant-temperature humidity adjusting bin is positioned in a constant-temperature water medium, so that the temperature in the bin is constant and can not be influenced by external environments; the heating of the walls of the bin is uniform; a silica gel sealing ring is adopted by a bin cover, and the bin cover is in a four-point positioning locking state, so that the sealing performance is high; a turbine is driven by water to drive a fan to adjust the atmosphere balance in the bin in real time, so that the uniformity of humidity is ensured; a semiconductor refrigeration heating device is adopted, so that the influence caused by change of the indoor environment temperature is avoided; and an automatic temperature compensation type temperature controller is adopted, so that the temperature control accuracy is improved.
Description
Technical field:
The invention belongs to coal property test technical field, be specifically related to a kind of moisture holding capacity analyzer and assay method thereof of coal.
Background technology:
The moisture holding capacity of coal is one of important indicator of ature of coal classification, and whether accurate its test result is directly has influence on grade of coal.The ultimate principle that the moisture holding capacity of coal measures is: coal sample reaches capacity after water suction, remove most of outside water with constant humidity paper and be laid in the measuring cup of certain specification, then place it in temperature 30 DEG C ± 0.1 DEG C, relative humidity be 96% fill in nitrogen humidistat, reach wetting balance at ambient pressure, then dry, the highest inherent water of coal is represented with the percentage of its mass loss.Be not difficult to find out from the ultimate principle that its measures, the principal element affecting the highest inherent water has temperature, humidity, pressure, atmosphere and humidistat volume profiles etc., and this any one condition wherein departs from all can affect test result.
Specify in GB, relative humidity in humidistat is 96%, when carrying out damping with potassium sulfate solution, need under uniform temperature and pressure, make the temperature of gas phase and liquid phase and pressure consistent, reach gas-liquid balance, potassium sulfate solution reaches capacity state, there is a time-independent steady state value, i.e. rh value, this process has strict requirement to temperature stability, because the steam partial pressure of potassium sulfate saturated solution only when temperature is 30 DEG C ± 0.1 DEG C is only 4.1kpa (30.6mmHg), namely relative humidity is 96%, be not difficult to find out thus, in the shape of constant temperature ageing bin and storehouse, temperature is vital.
The full-automatic moisture holding capacity analyzer of the patent No. a kind of coal disclosed in 200720193085.5, device mainly regulates humidity by ultrasonic transducer, and the highest inherent aquametry instrument of the coal of our development regulates humidity according to Standard by saturated potassium sulfate solution.
Summary of the invention:
The object of this invention is to provide that a kind of temperature and humidity that can meet national Specification requires, can Real-Time Monitoring regulable control temperature, humidity, be applied to moisture holding capacity instrument and the assay method thereof of coal analysis.
For achieving the above object, the present invention is by the following technical solutions:
A kind of moisture holding capacity analyzer of coal, comprise thermal insulation barn, in described thermal insulation barn, be provided with constant temperature ageing bin, the water pipe of described thermal insulation barn connecting sealed, described water pipe connects water pump and switch, by regulating water pump and switch, water enters thermal insulation barn internal circulation flow, and submergence constant temperature ageing bin, described constant temperature ageing bin underfill potassium sulfate saturated solution, constant temperature ageing bin inside is provided with specimen holder, when carrying out determination test, described thermal insulation barn and constant temperature ageing bin all closed.
The storehouse of described constant temperature ageing bin covers and is provided with turbine-driven set, described turbine-driven set one end connecting water pipe, and turbine apparatus stretches into warehouse end and connects fan, and water driven turbine device drives fan turns.
Arrange windproof radome fairing in the storehouse lid of described constant temperature ageing bin, be circumscribed with thermometer and hygrometer in warehouse, Cang Ding is provided with handle, is provided with magnet pillar at the bottom of storehouse.
Described constant temperature ageing bin lid adopts silica gel sealing ring, and Cang Gai and warehouse are locked by locking button four point positioning.
Described water pipe is also provided with cooling and heating device and temperature controller, and described cooling and heating device adopts semiconductor refrigerating heating arrangement, and described temperature controller adopts auto thermal compensation formula temperature controller.
Described specimen holder is 10.
Described constant temperature ageing bin warehouse is discoid shape, and height 11 ~ 14cm, diameter 24 ~ 28cm, adopt stainless steel.
Adopt the moisture holding capacity analyzer of coal of the present invention to carry out moisture holding capacity method for measuring to mensuration coal sample, concrete steps are as follows:
Step one: pre-service is carried out to coal sample:
Make coal sample reach capacity after water suction, with constant humidity paper removing coal sample outside water, coal sample is placed in measuring cup;
Step 2: coal sample is put into constant temperature ageing bin:
Bottom constant temperature ageing bin, place potassium sulfate saturated solution, measuring cup is put on the specimen holder in constant temperature ageing bin, close constant temperature ageing bin, constant temperature ageing bin is placed in thermal insulation barn;
Step 3: the temperature and humidity of regulating thermostatic ageing bin:
Water is injected in thermal insulation barn, open the switch on thermal insulation barn external water pipe and start water pump, between constant temperature ageing bin and thermal insulation barn two warehouse, water circulation is toward redoubling submergence constant temperature ageing bin, and make the temperature in constant temperature ageing bin maintain (30 ± 0.1) DEG C, relative humidity is 96%;
Step 4: the constant humidity process of coal sample in constant humidity storehouse:
Coal sample leaves standstill in constant temperature ageing bin, treats that it reaches wetting balance, and namely weighing of adjacent twice of coal sample is of poor qualityly no more than 0.3% of sample weighting amount;
Step 5: the mensuration of coal sample moisture:
Take out coal sample, carry out drying, obtain coal sample moisture holding capacity percentage composition by the mass loss of coal sample.
In described step 2, potassium sulfate saturated solution thickness is 15mm ~ 20mm.
When carrying out drying to coal sample in described step 5, temperature is 105 ~ 110 DEG C.
Cover in the storehouse of described constant temperature ageing bin and be provided with turbine apparatus, described turbine apparatus one end connecting water pipe, water driven turbine device stretches into warehouse end and connects fan, water driven turbine device drives fan turns, warehouse humidity atmosphere is regulated, in time running to coal sample and substantially reach wetting balance by described fan in described step 4.
The moisture holding capacity analyzer of coal of the present invention and the beneficial effect of assay method thereof: constant temperature ageing bin is all in thermostatted water medium; make temperature constant in storehouse and not by the impact of external environment; bulkhead is heated evenly; storehouse lid is built-in fills the windproof radome fairing of nitrogen; according to the size design of specimen mounting; play a protective role to sample, warehouse bottom surface area is comparatively large, more easily reaches required humidity.Constant temperature ageing bin Cang Gai adopts high resiliency silica gel sealing ring, and four point positioning is locked, and leakproofness is high; Adopt hydrodynamic force to drive turbine fan, equilibrium gas atmosphere in real-time surge bunker in storehouse, ensure the homogeneity of humidity; Adopt semiconductor refrigerating heating arrangement, the impact that the change avoiding indoor environment temperature brings; Adopt auto thermal compensation formula temperature controller, improve temperature-controlled precision; Devise 10 sample positions, temperature, humidity can Real-Time Monitoring and regulable control, and homogeneity is good, and control accuracy is high, and structure is simple, and cost is low, is convenient to promote the use of, and performance meets the requirement of national standard completely.
Accompanying drawing illustrates:
Fig. 1 is the structural representation of the moisture holding capacity analyzer of coal of the present invention.
Fig. 2 is the constant temperature ageing bin structural representation of the moisture holding capacity analyzer of coal of the present invention.
Fig. 3 is the turbine apparatus structural representation of the moisture holding capacity analyzer of coal of the present invention.
1-thermal insulation barn, 2-constant temperature ageing bin, 3-magnet pillar, 4-recirculated water, 5-water pump, 6-cooling and heating device, 7-temperature controller, 8-switch, 9-water pipe, 10-turbine apparatus, 11-handle, 12-potassium sulfate saturated solution, 13-specimen holder, 14-locks button, the windproof radome fairing of 15-, 16-fan.
Embodiment:
Below in conjunction with embodiment, the present invention is described in further detail.
According to Fig. 1 ~ Fig. 3, a moisture holding capacity analyzer for coal, comprises thermal insulation barn 1, is provided with constant temperature ageing bin 2 in thermal insulation barn 1, constant temperature ageing bin 2 warehouse is stainless steel, discoid shape, and highly about 12cm, basal diameter are about 25cm, bottom surface area is about 500cm
2, volume is about 6000cm
3, warehouse bottom surface area is larger, more easily reach required humidity, the external closed water pipe 9 of thermal insulation barn 1, water pipe 9 is disposed with water pump 5, switch 8, cooling and heating device 6 and temperature controller 7, the impact that the change avoiding indoor environment temperature brings and improve temperature-controlled precision, water pipe 9 fills recirculated water 4 between thermal insulation barn 1 and constant temperature ageing bin 2, constant temperature ageing bin 2 is made all to be in thermostatted water medium, temperature constant in storehouse and not by the impact of external environment, bulkhead is heated evenly, described constant temperature ageing bin 2 underfill potassium sulfate saturated solution 12, constant temperature ageing bin 2 inside is provided with 10 specimen holders 13, the storehouse of described constant temperature ageing bin 2 covers and is provided with turbine apparatus, described turbine apparatus 10 one end connecting water pipe 9, turbine apparatus 10 stretches into warehouse end and connects fan 16, water driven turbine device 10 drives fan 16 uniform rotation, equilibrium gas atmosphere in real-time surge bunker, to make atmosphere and pressure uniform in constant temperature ageing bin constant, ensure the homogeneity of humidity, when carrying out determination test, described thermal insulation barn 1 and constant temperature ageing bin 2 all closed.
In the storehouse lid of described constant temperature ageing bin 2, windproof radome fairing 15 is set; according to the size design of specimen holder 12; sample is played a protective role; thermometer and hygrometer is circumscribed with in warehouse; Cang Ding is provided with handle 11; be provided with magnet pillar 3 at the bottom of storehouse, allow constant temperature ageing bin can in more stable being fixed in thermal insulation barn of buoyancy of water environment.
Described constant temperature ageing bin 2 covers and adopts high resiliency silica gel sealing ring, and Cang Gai and warehouse are locked by locking button 14 four point positioning, and leakproofness is high.
Described cooling and heating device 6 is semiconductor refrigerating heating arrangement, and described temperature controller 7 is auto thermal compensation formula temperature controller.
Adopt the moisture holding capacity analyzer of coal of the present invention to carry out moisture holding capacity method for measuring to mensuration coal sample, concrete steps are as follows:
Step one: carry out pre-service to coal sample, makes coal sample reach capacity after water suction, with constant humidity paper removing coal sample outside water, coal sample is placed in measuring cup.
Get granularity and be less than the coal sample about 20 grams of 0.2mm in conical flask, and inject 100 ml waters, bottle is positioned on oscillator and vibrates 30 minutes, then soak 3 hours in the water-bath of (30 ± 0.1) DEG C, need during water-bath, to conical flask shake 3 ~ 6 times, to take out conical flask, coal sample inclination is poured into and is covered with in the Buchner funnel of filter paper, use vacuum pump suction filtration, until coal sample just surfaces.According to this suction filtration operation continuation water, 2 times are rinsed to coal sample, about 25 milliliters, the water of the band coal sample in each impouring funnel, then gently coal sample is mixed with sample shovel, (all the other encase with filter paper and use water-soaked therefrom to take out about 4 grams of coal samples, be stored in airtight container for subsequent use, wrap up by double-layer filter paper, firmly hold with hand, remove the water on surface, be placed in humidity cabinet upper strata sieve on, described humidity cabinet is the wooden case with cover that volume is about 250mm × 250mm × 150mm, the surrounding two-layer careless paperboard of lining or qualitative filter paper in case, water-soaked during use, three layers of moist glazed printing paper are spread at the bottom of case, two-layer sieve is placed in case, the aperture of upper strata sieve is 0.6mm, the aperture of lower floor's sieve is 0.45mm, sieve is respectively put some constant humidity paper, then coal sample is mixed with constant humidity paper, and the coal group being placed on upper strata sieve is scattered drop on lower floor's sieve, repeat same operation, until coal sample drops on glazed printing paper at the bottom of case, therefrom take out 1 ~ 2 gram of coal sample, put into measuring cup, shakeout,
Step 2: coal sample puts into constant temperature ageing bin:
Bottom constant temperature ageing bin 2, place thickness is the potassium sulfate crystallization of 15mm ~ 20mm and the potpourri of saturated solution thereof, the potpourri of potassium sulfate crystallization and saturated solution thereof is obtained by the ratio mixed configuration of the water of the chemical pure potassium sulfate of 10g and 3mL, the water vapor pressure of saturated potassium sulfate solution 30 DEG C time is 4.1kPa (about 30.6mmHg), humidity value is read by Hygrothermograph external in constant temperature ageing bin 2, relative humidity in constant temperature ageing bin is made to be 96%, measuring cup is put on the specimen holder 13 in constant temperature ageing bin, open weighing bottle cap, seal up constant temperature ageing bin 2, constant temperature ageing bin 2 is placed in thermal insulation barn 1,
Step 3: the temperature and humidity of regulating thermostatic ageing bin 2, water is injected toward thermal insulation barn 1 li, open the switch 8 on thermal insulation barn 1 external water pipe 9 and start water pump 5, between constant temperature ageing bin 2 and thermal insulation barn 1 liang of warehouse, water quality circulates, general about 30 minutes, the epidemic disaster meter external by constant temperature ageing bin 2 inwall reads temperature value and humidity value, and the temperature in constant temperature ageing bin maintains (30 ± 0.1) DEG C, and relative humidity is 96%;
Step 4: the constant humidity process of coal sample in constant humidity storehouse, coal sample leaves standstill in constant temperature ageing bin, treats that it reaches wetting balance, and namely adjacent weighing for twice is of poor qualityly no more than 0.3% of sample weighting amount;
By circulating the turbine apparatus 10 that water quality drives constant temperature ageing bin 2 storehouse to cover, the fan 16 in constant temperature ageing bin 2 is driven to rotate, wait running to when coal sample reaches wetting balance substantially, (bituminous coal and stone coal generally need 24 hours, brown coal 24 ~ 48 hours), open constant temperature ageing bin 2 Cang Gai, cover tightly measuring cup at once, take out, clean measuring cup, 5 minutes are put in ambient temperatare, then weigh, claim accurate to 0.0002 gram, within every 6 hours later, weigh once, until adjacent twice is of poor qualityly no more than 0.3% of sample weighting amount, be and reach wetting balance, for the ease of test, same coal should be carried out simultaneously,
Step 5: the mensuration of coal sample moisture, takes out coal sample, dry at the temperature of 105 ~ 110 DEG C, obtains coal sample moisture holding capacity percentage composition by the mass loss of coal sample;
The mensuration that mode realizes moisture can be measured especially by following two kinds of this area common aqueous:
1. use little space to fill nitrogen drying box: the determination of moisture carrying out coal sample after constant humidity by the drying in nitrogen in GB/T212;
2. use common drying box: be arranged on by can in the flat-temperature zone of in drying box 105 ~ 110 DEG C, and nitrogen is led to the flow velocity of 350 milliliters-minute in box, then by semi-open for the measuring cup pallet be placed in box, make coal sample in nitrogen stream dry 1.5 ~ 2 hours, take out measuring cup and cover tightly, 5 minutes are cooled under room temperature, move into again in exsiccator and place 15 minutes, claim accurate to 0.0002 gram, and then carry out inspectability drying with same program, each 30 minutes, until the Mass lost of double dry coal sample is no more than 0.0010 gram, or quality increase time till, in the case of the latter, quality is adopted to increase previous quality as basis, coal sample moisture holding capacity content is calculated,
The moisture holding capacity of coal sample is calculated as follows:
In formula: the moisture holding capacity massfraction of A-coal sample, %;
M
1the quality of measuring cup and lid thereof, unit is gram (g);
M
2measuring cup, lid and coal sample gross mass after wetting balance, unit is gram (g);
The gross mass of coal sample, measuring cup quality and lid thereof after m3 drying, unit is gram (g).
Finally should be noted that: above embodiment is only in order to illustrate that technical scheme of the present invention is not intended to limit, although with reference to above-described embodiment to invention has been detailed description, those of ordinary skill in the field are to be understood that: still can modify to the specific embodiment of the present invention or equivalent replacement, and not departing from any amendment of spirit and scope of the invention or equivalent replacement, it all should be encompassed in the middle of this right.
Claims (10)
1. the moisture holding capacity analyzer of a coal, it is characterized in that: comprise thermal insulation barn, in described thermal insulation barn, be provided with constant temperature ageing bin, the water pipe of described thermal insulation barn connecting sealed, described water pipe connects water pump and switch, by regulating water pump and switch, water enters thermal insulation barn internal circulation flow, and submergence constant temperature ageing bin, described constant temperature ageing bin underfill potassium sulfate saturated solution, constant temperature ageing bin inside is provided with specimen holder, when carrying out determination test, described thermal insulation barn and constant temperature ageing bin all closed.
2. the moisture holding capacity analyzer of coal according to claim 1, it is characterized in that: the storehouse of described constant temperature ageing bin covers and is provided with turbine apparatus, described turbine apparatus one end connecting water pipe, turbine apparatus stretches into warehouse end and connects fan, and water driven turbine device drives fan turns.
3. the moisture holding capacity analyzer of coal according to claim 1, it is characterized in that: in the storehouse lid of described constant temperature ageing bin, windproof radome fairing is set, thermometer and hygrometer is circumscribed with in warehouse, Cang Ding is provided with handle, magnet pillar is provided with at the bottom of storehouse, described constant temperature ageing bin lid adopts silica gel sealing ring, and Cang Gai and warehouse are locked by locking button four point positioning.
4. the moisture holding capacity analyzer of coal according to claim 1, is characterized in that: described water pipe is also provided with cooling and heating device and temperature controller.
5. the moisture holding capacity analyzer of coal according to claim 4, is characterized in that: described cooling and heating device adopts semiconductor refrigerating heating arrangement; Described temperature controller adopts auto thermal compensation formula temperature controller.
6. the moisture holding capacity analyzer of coal according to claim 1, is characterized in that: described specimen holder is 10.
7. the moisture holding capacity analyzer of coal according to claim 1, is characterized in that: described constant temperature ageing bin warehouse is discoid shape, and height 11 ~ 14cm, diameter 24 ~ 28cm, adopt stainless steel.
8. adopt the moisture holding capacity analyzer of coal according to claim 1 to carry out moisture holding capacity method for measuring to mensuration coal sample, it is characterized in that: concrete steps are as follows:
Step one: pre-service is carried out to coal sample:
Make coal sample reach capacity after water suction, with constant humidity paper removing coal sample outside water, coal sample is placed in measuring cup;
Step 2: coal sample puts into constant temperature ageing bin:
Bottom constant temperature ageing bin, place potassium sulfate saturated solution, measuring cup is put on the specimen holder in constant temperature ageing bin, close constant temperature ageing bin, constant temperature ageing bin is placed in thermal insulation barn;
Step 3: the temperature and humidity of regulating thermostatic ageing bin:
In thermal insulation barn, inject water, open the switch on thermal insulation barn external water pipe and start water pump, between constant temperature ageing bin and thermal insulation barn two warehouse, water circulation is toward redoubling submergence constant temperature ageing bin, and make the temperature in constant temperature ageing bin maintain 30 ± 0.1 DEG C, relative humidity is 96%;
Step 4: the constant humidity process of coal sample in constant temperature ageing bin:
Coal sample leaves standstill in constant temperature ageing bin, treats that it reaches wetting balance;
Step 5: the mensuration of coal sample moisture:
Take out coal sample, carry out drying, obtain coal sample moisture holding capacity percentage composition by the mass loss of coal sample.
9. method according to claim 8, is characterized in that: in described step 2, potassium sulfate saturated solution thickness is 15mm ~ 20mm; When carrying out drying to coal sample in described step 5, temperature is 105 ~ 110 DEG C.
10. method according to claim 8, it is characterized in that: cover in the storehouse of described constant temperature ageing bin and be provided with turbine apparatus, described turbine apparatus one end connecting water pipe, turbine apparatus stretches into warehouse end and connects fan, water driven turbine device drives fan uniform rotation, regulates warehouse humidity atmosphere and pressure, make the humidity atmosphere in constant temperature ageing bin more even in described step 4 by described fan, constant pressure, makes the coal sample left standstill reach wetting balance further.
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| CN108801841A (en) * | 2018-06-11 | 2018-11-13 | 佛山石湾鹰牌陶瓷有限公司 | A kind of detection method of the mass property of raw material fire coal |
| CN109470593A (en) * | 2017-09-07 | 2019-03-15 | 中冶长天国际工程有限责任公司 | Absolute method online moisture detector and detection method |
| CN111175178A (en) * | 2020-03-04 | 2020-05-19 | 河南理工大学 | Device and method for quickly cooling and accurately testing coal gas content |
| CN113418823A (en) * | 2021-08-10 | 2021-09-21 | 湖北中烟工业有限责任公司 | Device for detecting tobacco sheet pulp in papermaking method |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109470593A (en) * | 2017-09-07 | 2019-03-15 | 中冶长天国际工程有限责任公司 | Absolute method online moisture detector and detection method |
| CN109470593B (en) * | 2017-09-07 | 2024-03-12 | 中冶长天国际工程有限责任公司 | Absolute method on-line moisture detector and detection method |
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| CN113418823A (en) * | 2021-08-10 | 2021-09-21 | 湖北中烟工业有限责任公司 | Device for detecting tobacco sheet pulp in papermaking method |
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Application publication date: 20151202 |