CN102937540A - Hot air penetrating internal circulation coal sample dehumidifying device capable of automatically conveying samples and taking samples - Google Patents
Hot air penetrating internal circulation coal sample dehumidifying device capable of automatically conveying samples and taking samples Download PDFInfo
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- CN102937540A CN102937540A CN2012102124669A CN201210212466A CN102937540A CN 102937540 A CN102937540 A CN 102937540A CN 2012102124669 A CN2012102124669 A CN 2012102124669A CN 201210212466 A CN201210212466 A CN 201210212466A CN 102937540 A CN102937540 A CN 102937540A
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Abstract
The invention discloses a hot air penetrating internal circulation coal sample dehumidifying device capable of automatically conveying samples and taking the samples. The device comprises a box body, a controller, a sample conveying and taking mechanism and a fan, a separator plate, a gas heater, more than one sample-containing mechanisms which are installed in the box body, wherein the box body is divided into an upper chamber and a lower chamber which are communicated with each other by the separator plate; the fan is disposed in the upper chamber; each sample-containing mechanism comprises a coal sample plate for containing the coal samples and a coal sample holder for collecting fallen samples; more than one air vents are disposed at the bottom of the coal sample plate; a seal part for contact cooperation with the separator plate is disposed on the top of the coal sample plate; the coal sample holder is disposed below the coal sample plate; and the sample conveying and taking mechanism is connected with the sample-containing mechanism and drives the sample-containing mechanism to get in and out of the box body. The device has the advantages of simple structure, high automation degree, convenient operations, high dehumidification efficiency, low energy consumption, etc. The device can increase accuracy for sample preparation and reduce labor intensity.
Description
Technical field
The present invention is mainly concerned with the sample making apparatus field of coal, refers in particular to a kind of coal sample dehumidifying device that adopts hot-air through type.
Background technology
For coal analysis, be actually a kind of process of sampling analysis.Coal is a kind of inhomogeneous material (granularity, mass property distribution etc.), the female parent of being sampled is larger (tens tons to several ten thousand tons are not waited) generally, be extracted into to greatest extent the process of the representative sample that can represent whole maternal quality and characteristic " sampling ", the various ways methods such as mechanical sampling, artificial sample, half mechanical sampling are arranged at present.Every country all has the pressure standard, must abide by standard and carry out sampling work.
After adopting sample by standard, next process is sample preparation, and the criterion of sample making course is under the prerequisite of not destroying sample representativeness, and sample granularity is reduced gradually, and quality also gradually reduces, until meet laboratory assay to granularity and quality (weight) requirement of sample.Sample making course generally is the processes such as free air dry, fragmentation, division, abrasive dust.Air dry (but also heat drying, but temperature should be less than 50 ℃) process is to reduce the outside moisture of sample, and the fragmentation and the division process that are beneficial to the back are normally carried out.Fragmentation is the process that sample granularity is reduced in the sample making course.The division process is the process that sample is subtracted typically matter, the Coal Characteristics of sample before the part sample that reduces must be able to represent and reduce, the division process also is to finish the process that sample size reduces in the sample making course, and other process Plays regulations should not allow the coal sample loss.Because the sample loss of non-division process (run off such as coal dust, spoil be selected etc.), can change the Coal Characteristics of this sample, selectivity (not necessarily artificial) sample that runs off is that sample making course is definitely unallowed.
For the dry run of coal sample, present existing dehumidification mode mainly contains two kinds:
(1) air natural dries mode: this mode can not change the mass property of coal, but efficient is too low, and chronic (being generally 24～48 hours), and occupied ground is larger.
(2) hot blast and large oven for drying mode: this mode is to carry out the dry dehumidification of coal sample with high-power heating lamp or high-power baking oven.This class mode is not because analyze two stages of the mass transfer of dehumidification process, and the moisture evaporation is only carried out on the material surface, and the material of internal layer is difficult to evaporate moisture, and the air on the material surface water absorbing capacity that in a single day reaches capacity, and just can not suck moisture again.The air on surface is not as in time being taken away or being taken a breath, and in fact the moisture evaporation can stop.Therefore not too soon dehumidification of this mode, efficient equally can be very low, and the time can be very long.Because what baking oven used is conventional fan, air exchanging rate is slow, and scavenging efficiency is low, therefore can make air in the case near saturated suction, so uses the efficient of oven drying high-moisture material can be very low.
Summary of the invention
The technical problem to be solved in the present invention just is: for the technical matters that prior art exists, the invention provides a kind of simple in structure, automaticity is high, easy to operate, dehumidification efficient high, energy consumption is low, can improve the sample preparation accuracy, the hot blast that can automatically send sampling that reduces labour intensity penetrates internal-circulation type coal sample dehumidifying device.
For solving the problems of the technologies described above, the present invention by the following technical solutions:
A kind of hot blast of sampling that can automatically send penetrates internal-circulation type coal sample dehumidifying device, comprise casing, controller, send sampling mechanism and be installed in airtight casing interior blower fan, dividing plate, gas heater, more than one Sheng model machine structure, described dividing plate is separated into upper chamber and the lower chambers of connection with casing, and described blower fan is arranged in upper chamber; Described Sheng model machine structure comprises the coal sample dish of splendid attire coal sample and the coal sample holder that is used for collecting sample, the bottom of described coal sample dish offers more than one air vent, the top of described coal sample dish is provided with to contact the sealing that cooperates with dividing plate, and described coal sample restitope is in the below of coal sample dish; Describedly send sampling mechanism and contain that the model machine structure links to each other and pass in and out casing with containing the model machine structure.
As a further improvement on the present invention:
Side in the described casing forms return air channel, described blower fan is air exhauster and is arranged in top chamber, the air outlet of described blower fan is connected with an end of return air channel, and the other end of described return air channel is connected with bottom chamber, and described gas heater is installed in the return air channel.
Be equipped with to detect the wind gage of hot blast flow velocity in the described return air channel, described controller links to each other with blower fan by a frequency converter; Thereby described controller is relatively adjusted the rotating speed of blower fan by frequency converter according to the wind gage wind velocity signal that gathers and the wind speed of presetting.
Described coal sample holder comprises from top to bottom support portion, ventilation unit and the receipts sample section that links to each other successively, and described coal sample dish is positioned over the top of support portion, and described receipts sample section is positioned at the below of support portion.
Described coal sample holder and coal sample dish are one-body molded.
The described sampling mechanism that send is an elevating mechanism, the described elevating mechanism that comprises comprises the swingle more than, one end of described swingle links to each other with Sheng model machine structure and finishes lifting with containing the rotation of model machine structure, and the other end of described swingle is articulated on casing or the casing peripheral operation platform.
The described sampling mechanism that send is an elevating mechanism, and the described elevating mechanism that comprises comprises the elevating screw assembly, and described Sheng model machine structure is connected on the elevating screw assembly and can finishes elevating movement with the motion of elevating screw assembly.
Compared with prior art, the invention has the advantages that: the hot blast of sampling that can automatically send of the present invention penetrates internal-circulation type coal sample dehumidifying device, the dehumidification mode that adopts hot blast to penetrate, effectively increased the evaporation surface of coal sample, efficient can improve several times to decades of times, the coal sample holder that simultaneously further is provided with to collect sample below the coal sample dish has guaranteed the integrality of coal sample to have improved the accuracy of sample preparation.
Description of drawings
Fig. 1 is structural principle synoptic diagram of the present invention.
Fig. 2 is the sectional structure synoptic diagram at A-A place among Fig. 1.
Fig. 3 is the plan structure synoptic diagram of coal sample dish among the present invention.
Fig. 4 is the sectional structure synoptic diagram at B-B place among Fig. 3.
Fig. 5 is the plan structure synoptic diagram of coal sample holder among the present invention.
Fig. 6 is the sectional structure synoptic diagram at C-C place among Fig. 5.
Fig. 7 is that the coal sample dish is positioned over the structural representation after the combination in the coal sample holder among the present invention.
Fig. 8 is the structural representation that in another embodiment coal sample holder and coal sample dish adopt integrated molding.
Fig. 9 to be the present invention send in concrete application example sampling mechanism is in the swing state structural representation.
The structural representation of Figure 10 when to be the present invention send sampling mechanism to be in dress sample state in concrete application example.
Marginal data
1, casing; 101, upper chamber; 102, lower chambers; 2, blower fan; 3, dividing plate; 4, controller; 5, coal sample dish; 6, gas heater; 7, coal sample holder; 8, return air channel; 9, wind gage; 10, frequency converter; 51, air vent; 52, sealing; 71, support portion; 72, ventilation unit; 73, receive sample section; 11, coal sample; 12, sealing gasket; 13, swingle; 14, condensation of gas dehumidifying parts.
Embodiment
Below with reference to Figure of description and specific embodiment the present invention is described in further details.
As depicted in figs. 1 and 2, the hot blast of sampling that can automatically send of the present invention penetrates internal-circulation type coal sample dehumidifying device, comprise casing 1, controller 4 and be installed in blower fan 2, dividing plate 3, gas heater 6, more than one Sheng model machine structure in the airtight casing 1, dividing plate 3 is separated into casing 1 upper chamber 101 and the lower chambers 102 of connection, blower fan 2 is arranged in upper chamber 101, and this blower fan 2 adopts air exhauster.Referring to Fig. 3～shown in Figure 7, contain the model machine structure and comprise the coal sample dish 5 of splendid attire coal sample and the coal sample holder 7 that is used for collecting sample, coal sample 11 paves uniformly in coal sample dish 5, the bottom of coal sample dish 5 offers more than one air vent 51, hot-air flow passes from air vent 51, see through uniformly coal sample 11, coal sample 11 is carried out the dehumidification operation.The top of coal sample dish 5 is provided with to contact the sealing 52 that cooperates with dividing plate 3, and coal sample holder 7 is positioned at the below of coal sample dish 5; Send sampling mechanism and contain that the model machine structure links to each other and pass in and out casing 1 with containing the model machine structure.Gas heater 6 is used for recirculating air is heated, and guarantees the coal sample 11 in the coal sample dish 5 is heated dehumidification.Dehumidification (diminishing) process is actually a mass transport process, namely will progressively take away the moisture in the material by the air that flows, and the moisture of material just can gradually reduce.The diminishing process is divided into two stages, and first stage moisture will change steam state into by liquid state from the material surface; Second stage is to want molten in the air on material surface by the steam that the material surface is evaporated to steam state, is taken away by the air that flows.This two stages all with the temperature correlation of material periphery, the water yield that the evaporation of material surface moisture and ambient air institute can molten suctions follows temperature to have functional relation, temperature is higher, velocity of evaporation is faster, the water yield of the solvable suction of a certain amount of air is also larger.But temperature is high to the physics and chemistry characteristic that to a certain degree can affect coal sample, and therefore, international standard regulation temperature at this moment can not be higher than 40 ℃, and national Specification is 50 ℃.Therefore, the dehumidification method that the present invention adopts hot blast to penetrate is the evaporation surface that increases material for effective, and efficient can improve several times to decades of times.Simultaneously, in the dehumidification process, can not lose coal sample 11 in order to guarantee air-flow, so the present invention further is provided with to collect the coal sample holder 7 of sample below coal sample dish 5, to guarantee the integrality of coal sample 11, improves the accuracy of sample preparation.
In the present embodiment, side in casing 1 forms return air channel 8, and blower fan 2 is for air exhauster and be arranged in top chamber, and the air outlet of blower fan 2 is connected with an end of return air channel 8, the other end of return air channel 8 is connected with bottom chamber, and gas heater 6 is installed in the return air channel 8.By the work of blower fan 2, make the thermal current of casing 1 bottom up move penetrating the coal sample 11 in the coal sample dish 5, finish dehumidification.Simultaneously, the air-flow that is positioned at casing 1 top cavity enters again return air channel 8, is admitted to again in the cavity of casing 1 bottom after re-using behind the gas heater 6, heating.Be appreciated that in the return air channel 8, in order to improve the flow velocity of air-flow, can also increase again more than one pressure fan.Present embodiment also is provided with one and is used for condensation of gas dehumidifying parts 14 that gas is dehumidified in return air channel 8.
In the present embodiment, be equipped with to detect the wind gage 9 of hot blast flow velocity in the return air channel 8, controller 4 links to each other with blower fan 2 by a frequency converter 10.At the dry initial stage of coal sample 11, because coal sample 11 moisture are high, gas penetration potential is not strong, dry gas stream speed is lower than pre-set velocity, thereby controller 4 gathers the wind velocity signal of wind gage 9 and relatively adjusts blower fan 2 rotating speeds by frequency converter 10 with default wind speed, so that dry inlet velocity is consistent with default wind speed, to accelerate rate of drying.Along with the moisture of sample in the dryer constantly separates, the gas penetration potential of sample strengthens, and the dry gas stream wind speed increases gradually.Controller 4 will constantly be adjusted fan speed according to the signal intensity of wind gage 9, and wind speed is reduced gradually, thus avoided coal sample 11 too dry, reach energy-conservation effect.
Overall, the purpose of frequency conversion is to produce air quantity and the wind speed that matches according to the element number of real work, thereby guarantees the optimum efficiency of dehumidification.Be that the real work unit is few, frequency conversion reduces air quantity, increases such as actual working cell, and frequency conversion increases air quantity.Implementation procedure is to install wind speed detection device in blast main additional, if detect wind speed unexpected minimizing is arranged, and showing has new working cell to add work, and should improve air quantity this moment.As detect wind speed and increase suddenly, then be because the working cell state of deactivating is arranged, should reduce air quantity.
From the course of work of a unit, the diminishing process of material be divided into high humidity, in wet and three processes of low humidity, at the diminishing initial stage, humidity of materials is large, windage is correspondingly larger, will keep through material enough air quantity and wind speed this moment, the blast that needs should be maximum.Along with the reduction of material moisture, windage can progressively reduce, and should adjust air quantity and wind speed this moment in good time.In the phase III, there are a lot of high humidity samples to have the caking situation and occur, this moment, windage can increase on the contrary, if also need continue dehumidification, should improve blast, to keep suitable wind speed.
In the present embodiment, referring to Fig. 3～Fig. 7, coal sample holder 7 comprises support portion 71, the ventilation unit 72 that links to each other successively from top to bottom and receives sample section 73, be provided with sealing gasket 12 between sealing 52 and the dividing plate 3, coal sample dish 5 is positioned over the top of support portion 71, and guarantee that coal sample dish 5 and the contact site of support portion 71 seal fully, receive the below that sample section 73 is positioned at support portion 71.That is, the side of coal sample dish 5 guarantees sealing.If the void ratio of the side of coal sample dish 5 (i.e. periphery) is larger, just may make the periphery of most of air flow direction dish and streams mistake that can be from dish.In order to make flow through to greatest extent coal sample 11 in the coal sample dish 5 of thermal current, it is better that the side of coal sample dish 5 in fact more seals.Can abstractively the periphery of coal sample dish 5 be likened into two passes with middle part air vent 51, which bar road hot blast will be walked from, see that the resistance in which bar road is little (also being windage).
As shown in Figure 8, in another embodiment, can also be according to actual needs, with coal sample holder 7 and coal sample dish 5 one-body molded (referring to Fig. 2), coal sample holder 7 is located immediately at the below of coal sample dish 5.
In the present embodiment, sending sampling mechanism is an elevating mechanism, elevating mechanism comprises the swingle 13 more than, and an end of swingle 13 links to each other with Sheng model machine structure and finishes lifting with containing the rotation of model machine structure, and the other end of swingle 13 is articulated on casing 1 or the casing 1 peripheral operation platform.Referring to Fig. 9 and Figure 10, present embodiment has four swingles 13, be articulated in the bottom in the casing 1, can be with containing the motion of model machine structure during rotation, rise to dividing plate 3 and contact, perhaps descend and extend out to that casing 1 is outer to fill sample, because coal sample 11 is sometimes very heavy, so just make operating personnel's operation more quick, reduced labour intensity.
Perhaps, in another embodiment, send sampling mechanism also can be an elevating mechanism, elevating mechanism comprises the elevating screw assembly, and Sheng model machine structure is connected on the elevating screw assembly and can finishes elevating movement with the motion of elevating screw assembly.Whole elevating screw assembly is installed in the casing 1, finishes dress sample or sampling in casing 1.
Be appreciated that it is in order to make Sheng model machine structure finish elevating movement, conveniently to fill sample and sampling, according to this thinking, can adopting the various mechanism design that can finish elevating movement that the present invention send the purpose of sampling mechanism.
Below only be preferred implementation of the present invention, protection scope of the present invention also not only is confined to above-described embodiment, and all technical schemes that belongs under the thinking of the present invention all belong to protection scope of the present invention.Should be pointed out that for those skilled in the art the some improvements and modifications not breaking away under the principle of the invention prerequisite should be considered as protection scope of the present invention.
Claims (7)
1. one kind can be sent the hot blast of sampling to penetrate internal-circulation type coal sample dehumidifying device automatically, it is characterized in that: comprise casing (1), controller (4), send sampling mechanism and be installed in airtight casing (1) interior blower fan (2), dividing plate (3), gas heater (6), more than one Sheng model machine structure, described dividing plate (3) is separated into upper chamber (101) and the lower chambers (102) of connection with casing (1), and described blower fan (2) is arranged in upper chamber (101); The coal sample holder (7) that described Sheng model machine structure comprises the coal sample dish (5) of splendid attire coal sample and is used for collecting sample, the bottom of described coal sample dish (5) offers more than one air vent (51), the top of described coal sample dish (5) is provided with to contact the sealing (52) that cooperates with dividing plate (3), and described coal sample holder (7) is positioned at the below of coal sample dish (5); Describedly send sampling mechanism and contain that the model machine structure links to each other and pass in and out casing (1) with containing the model machine structure.
2. the hot blast of sampling that can automatically send according to claim 1 penetrates internal-circulation type coal sample dehumidifying device, it is characterized in that: the side in the described casing (1) forms return air channel (8), described blower fan (2) is for air exhauster and be arranged in top chamber, the air outlet of described blower fan (2) is connected with an end of return air channel (8), the other end of described return air channel (8) is connected with bottom chamber, and described gas heater (6) is installed in the return air channel (8).
3. the hot blast of sampling that can automatically send according to claim 2 penetrates internal-circulation type coal sample dehumidifying device, it is characterized in that: the wind gage (9) of hot blast flow velocity is installed to detect in the described return air channel (8), and described controller (4) links to each other with blower fan (2) by a frequency converter (10); Described controller (4) according to wind gage (9) thus the wind velocity signal that gathers and default wind speed are relatively adjusted the rotating speed of blower fan (2) by frequency converter (10).
According to claim 1 and 2 or the 3 described hot blasts of sampling that can automatically send penetrate internal-circulation type coal sample dehumidifying device, it is characterized in that: described coal sample holder (7) comprises support portion (71), the ventilation unit (72) that links to each other successively from top to bottom and receives sample section (73), described coal sample dish (5) is positioned over the top of support portion (71), and described receipts sample section (73) is positioned at the below of support portion (71).
5. the hot blast of sampling that can automatically send according to claim 4 penetrates internal-circulation type coal sample dehumidifying device, it is characterized in that: described coal sample holder (7) is one-body molded with coal sample dish (5).
According to claim 1 and 2 or the 3 described hot blasts of sampling that can automatically send penetrate internal-circulation type coal sample dehumidifying device, it is characterized in that: the described sampling mechanism that send is an elevating mechanism, elevating mechanism comprises the swingle (13) more than, one end of described swingle (13) links to each other with Sheng model machine structure and finishes lifting with containing the rotation of model machine structure, and the other end of described swingle (13) is articulated on casing (1) or casing (1) the peripheral operation platform.
According to claim 1 and 2 or the 3 described hot blasts of sampling that can automatically send penetrate internal-circulation type coal sample dehumidifying device, it is characterized in that: the described sampling mechanism that send is an elevating mechanism, elevating mechanism comprises the elevating screw assembly, and described Sheng model machine structure is connected on the elevating screw assembly and can finishes elevating movement with the motion of elevating screw assembly.
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| CN201210212466.9A CN102937540B (en) | 2012-06-26 | 2012-06-26 | The hot blast of sampling can be automatically sent to penetrate internal-circulation type coal sample dehumidifying device |
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| CN201210212466.9A CN102937540B (en) | 2012-06-26 | 2012-06-26 | The hot blast of sampling can be automatically sent to penetrate internal-circulation type coal sample dehumidifying device |
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| CN103994912A (en) * | 2014-05-11 | 2014-08-20 | 中国矿业大学 | Immersion method capable of maintaining structural integrity of coal sample |
| CN113686719A (en) * | 2021-09-08 | 2021-11-23 | 淮北矿业股份有限公司涡北选煤厂 | Coal moisture detection and drying cooling workstation |
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| CN102937540B (en) | 2016-03-09 |
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