CN102937540B - The hot blast of sampling can be automatically sent to penetrate internal-circulation type coal sample dehumidifying device - Google Patents
The hot blast of sampling can be automatically sent to penetrate internal-circulation type coal sample dehumidifying device Download PDFInfo
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Abstract
The invention discloses a kind of hot blast of sampling that can automatically send and penetrate internal-circulation type coal sample dehumidifying device, comprise casing, controller, send sampling mechanism and be installed in blower fan, dividing plate, gas heater, the more than one Sheng model machine structure in containment housing, casing is separated into upper chamber and the lower chambers of connection by dividing plate, and blower fan is arranged in upper chamber; Contain model machine structure comprise for splendid attire coal sample coal sample dish and be used for collecting the coal sample holder of sample, the bottom of coal sample dish offers more than one air vent, and the top of coal sample dish is provided with the sealing for coordinating with baffle contacts, and coal sample restitope is in the below of coal sample dish; Sampling mechanism is sent to be connected with Sheng model machine structure and to pass in and out casing with containing model machine structure.The present invention has that structure is simple, automaticity is high, easy to operate, dehumidification efficiency is high, energy consumption is low, can improve sample preparation accuracy, reduces the advantages such as labour 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 dehumidification equipment adopting hot-air through type.
Background technology
For coal analysis, be actually a kind of process of sampling analysis.Coal is a kind of uneven material (granularity, mass property distribution etc.), the female parent be sampled general larger (tens tons to several ten thousand tons not etc.), the process being extracted into the representative sample that can represent whole maternal quality and characteristic to greatest extent, " sampling ", has the various ways methods such as mechanical sampling, artificial sample, half mechanical sampling at present.Every country all has pressure standard, must carry out sampling work in accordance with standard.
After adopting sample by standard, next process is sample preparation, and the criterion of sample making course is under the prerequisite not destroying sample representativeness, and sample granularity is reduced gradually, and quality also gradually reduces, until meet laboratory assay to the granularity of sample and quality (weight) requirement.Sample making course generally has the processes such as air oxygen detrition, fragmentation, division, abrasive dust.Air oxygen detrition (also can heat drying, but temperature should be less than 50 DEG C) process reduces sample exterior moisture, is beneficial to fragmentation below and division process is normally carried out.In sample making course, fragmentation is the process that sample granularity is reduced.Division process is process sample being subtracted typically to matter, the Coal Characteristics of sample before the part sample reduced must can represent and reduce, division process is also the process completing sample size minimizing in sample making course, and other process Plays regulation should not allow coal sample to lose.Because the sample loss of non-division process (as coal dust runs off, spoil is selected), the Coal Characteristics of this sample can be changed, selectivity (not necessarily artificial) the sample that runs off be that sample making course is definitely unallowed.
For the dry run of coal sample, current existing dehumidification mode mainly contains two kinds:
(1) air natural dries mode: which can not change the mass property of coal, but efficiency is too low, chronic (being generally 24 ~ 48 hours), and occupied ground is larger.
(2) hot blast and large oven for drying mode: which carries out the dry dehumidification of coal sample with high-power heating lamp or high-power baking oven.This kind of mode is not because analyze two stages of the mass transfer of dehumidification process, and moisture evaporation is only carried out on material surface, and the material of internal layer is difficult to evaporate moisture, and the air on material surface is once the water absorbing capacity that reaches capacity, and would not suck moisture again.The air on surface is not if taken away in time or taken a breath, and in fact moisture evaporation can stop.Therefore which can not too fast dehumidification, and efficiency equally can be very low, and the time can be very long.Because baking oven uses conventional fan, air exchanging rate is slow, and scavenging efficiency is low, and the air in case therefore can be made close to saturated water suction, and therefore the efficiency of use oven drying high-moisture material can be very low.
Summary of the invention
The technical problem to be solved in the present invention is just: the technical matters existed for prior art, and the hot blast of sampling that can automatically send of the labour intensity that the invention provides that a kind of structure is simple, automaticity is high, easy to operate, dehumidification efficiency is high, energy consumption is low, can improve sample preparation accuracy, reduces 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 blower fan, dividing plate, gas heater, the more than one Sheng model machine structure in containment housing, casing is separated into upper chamber and the lower chambers of connection by described dividing plate, and described blower fan is arranged in upper chamber; Described Sheng model machine structure comprise for splendid attire coal sample coal sample dish and be used for collecting the coal sample holder of sample, the bottom of described coal sample dish offers more than one air vent, the top of described coal sample dish is provided with the sealing for coordinating with baffle contacts, and described coal sample restitope is in the below of coal sample dish; The described sampling mechanism that send is connected with Sheng model machine structure and passes in and out casing with containing model machine structure.
As a further improvement on the present invention:
Side in 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 one 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 return air channel.
Be provided with the wind gage for detecting hot blast flow velocity in described return air channel, described controller is connected with blower fan by a frequency converter; Described controller is compared according to the wind velocity signal of wind gage collection with the wind speed preset thus is adjusted the rotating speed of blower fan by frequency converter.
Described coal sample holder comprises connected successively support portion, ventilation unit and receipts sample portion from top to bottom, and described coal sample dish is positioned over the top of support portion, and described receipts sample portion is positioned at the below of support portion.
Described coal sample holder and coal sample dish one-body molded.
The described sampling mechanism that send is an elevating mechanism, describedly comprise the swingle that elevating mechanism comprises more than, one end of described swingle is connected with Sheng model machine structure and has rotated lifting with containing model machine structure, and the other end of described swingle is articulated with on casing or casing peripheral operation platform.
The described sampling mechanism that send is an elevating mechanism, described in comprise elevating mechanism and comprise elevating screw assembly, described Sheng model machine structure to be connected on elevating screw assembly and can to complete 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, adopt the dehumidification mode that hot blast penetrates, effectively increase the evaporation surface of coal sample, efficiency can improve several times to decades of times, being provided with the coal sample holder for collecting sample simultaneously further in the below of coal sample dish, ensure that the integrality of coal sample, improve the accuracy of sample preparation.
Accompanying drawing explanation
Fig. 1 is structural principle schematic diagram of the present invention.
Fig. 2 is the sectional structure schematic diagram at A-A place in Fig. 1.
Fig. 3 is the plan structure schematic diagram of coal sample dish in the present invention.
Fig. 4 is the sectional structure schematic diagram at B-B place in Fig. 3.
Fig. 5 is the plan structure schematic diagram of coal sample holder in the present invention.
Fig. 6 is the sectional structure schematic diagram at C-C place in Fig. 5.
Fig. 7 is that in the present invention, coal sample dish is positioned over the structural representation in coal sample holder after combination.
Fig. 8 is the structural representation that coal sample holder in another embodiment and coal sample dish adopt integrated molding.
Fig. 9 is that the present invention send sampling mechanism to be in structural representation in swing state in embody rule example.
Figure 10 be the present invention send in embody rule example sampling mechanism be in dress sample state time structural representation.
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, sample portion is received; 11, coal sample; 12, sealing gasket; 13, swingle; 14, condensation of gas dehumidifying section.
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, the more than one Sheng model machine structure in airtight casing 1, casing 1 is separated into upper chamber 101 and the lower chambers 102 of connection by dividing plate 3, blower fan 2 is arranged in upper chamber 101, and this blower fan 2 adopts air exhauster.Shown in Fig. 3 ~ Fig. 7, contain model machine structure comprise for splendid attire coal sample coal sample dish 5 and be used for collecting the coal sample holder 7 of 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, uniform through coal sample 11, dehumidification operation is carried out to coal sample 11.The top of coal sample dish 5 is provided with for contacting the sealing 52 coordinated with dividing plate 3, and coal sample holder 7 is positioned at the below of coal sample dish 5; Sampling mechanism is sent to be connected with Sheng model machine structure and to pass in and out casing 1 with containing model machine structure.Gas heater 6 is used for heating recirculating air, ensures to carry out heating dehumidification to the coal sample 11 in coal sample dish 5.Dehumidification (diminishing) process is actually a mass transport process, and namely by the air of flowing, the moisture in material progressively will be taken away, the moisture of material just can gradually reduce.Diminishing process is divided into two stages, and first stage moisture will be steam state by liquid state from material surface; Second stage wants molten in the air on material surface by the surperficial steam being evaporated to steam state of material, taken away by the air flowed.This two stages all with the temperature correlation of material periphery, the evaporation of material surface moisture and ambient air institute can the water yield of molten suction follow temperature to have functional relation, and temperature is higher, and velocity of evaporation is faster, and the water yield of the solvable suction of a certain amount of air is also larger.But temperature height can affect the physics and chemistry characteristic of coal sample to a certain extent, and therefore, international standard specifies that temperature now can not higher than 40 DEG C, and national Specification is 50 DEG C.Therefore, the dehumidification method that the present invention adopts hot blast to penetrate, be the evaporation surface in order to effectively increase material, efficiency can improve several times to decades of times.Meanwhile, in order to ensure that air-flow can not lose coal sample 11 in dehumidification process, therefore the present invention is provided with the coal sample holder 7 for collecting sample further in the below of coal sample dish 5, to ensure 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 air exhauster and is arranged in top chamber, and the air outlet of blower fan 2 is connected with one 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 return air channel 8.By the work of blower fan 2, make the thermal current bottom casing 1 up move penetrating the coal sample 11 in coal sample dish 5, complete dehumidification.Meanwhile, the air-flow being positioned at casing 1 top cavity enters again return air channel 8, is admitted to again in the cavity bottom casing 1 after re-using after gas heater 6, heating.Being appreciated that in return air channel 8, in order to improve the flow velocity of air-flow, more than one pressure fan can also being increased again.The present embodiment is also provided with a condensation of gas dehumidifying section 14 being used for dehumidifying to gas in return air channel 8.
In the present embodiment, be provided with the wind gage 9 for detecting hot blast flow velocity in return air channel 8, controller 4 is connected with blower fan 2 by a frequency converter 10.At the dry initial stage of coal sample 11, because coal sample 11 moisture is high, gas penetration potential is not strong, dry gas stream speed is lower than pre-set velocity, controller 4 gathers the wind velocity signal of wind gage 9 and compares with the wind speed preset thus adjust blower fan 2 rotating speed by frequency converter 10, make dry inlet velocity consistent with the wind speed preset, to accelerate rate of drying.Along with in dryer, the moisture of sample is constantly separated, and the gas penetration potential of sample strengthens, and dry gas stream wind speed increases gradually.Controller 4 constantly adjusts fan speed by according to the signal intensity of wind gage 9, and wind speed is reduced gradually, thus avoid coal sample 11 too dry, reach energy-conservation effect.
Overall, the object of frequency conversion produces according to the element number of real work the air quantity and wind speed that match, thus ensure the optimum efficiency of dehumidification.Namely real work unit is few, and frequency conversion makes air quantity reduce, and as actual working cell increases, frequency conversion makes air quantity increase.Implementation procedure installs wind speed detection device additional in blast main, if detect that wind speed has unexpected minimizing, shows have new working cell to add work, now should improve air quantity.As detected, wind speed increases suddenly, be then because there is working cell to deactivate state, 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 low humidity three processes, at the diminishing initial stage, humidity of materials is large, and windage is correspondingly comparatively large, and now will maintain through the enough air quantity of material and wind speed, the blast of needs should be maximum.Along with the reduction of material moisture, windage can progressively reduce, and now should adjust air quantity and wind speed in good time.In the phase III, have a lot of high humidity sample to have caking situation and occur, now windage can increase on the contrary, if also need to continue dehumidification, should improve blast, to maintain suitable wind speed.
In the present embodiment, see Fig. 3 ~ Fig. 7, coal sample holder 7 comprises connected successively support portion 71, ventilation unit 72 from top to bottom and receives sample portion 73, sealing gasket 12 is provided with between sealing 52 and dividing plate 3, coal sample dish 5 is positioned over the top of support portion 71, and ensure that coal sample dish 5 seals completely with the contact site of support portion 71, receive the below that sample portion 73 is positioned at support portion 71.That is, the side of coal sample dish 5 ensures sealing.If the void ratio of the side of coal sample dish 5 (i.e. periphery) is comparatively large, just may makes the periphery of most of air flow direction dish and can not flow through from the material dish.In order to make thermal current flow through coal sample 11 in coal sample dish 5 to greatest extent, in fact the side of coal sample dish 5 seals better and better.Abstractively the periphery of coal sample dish 5 can be likened into two passes with middle part air vent 51, hot blast Yao Congnatiao walks in road, and the resistance in Yao Kannatiao road is little (being also windage).
As shown in Figure 8, in another embodiment, can also according to actual needs, by coal sample holder 7 and coal sample dish 5 one-body molded (see Fig. 2), coal sample holder 7 is located immediately at the below of coal sample dish 5.
In the present embodiment, sampling mechanism is sent to be an elevating mechanism, elevating mechanism comprises the swingle 13 of more than, and one end of swingle 13 is connected with Sheng model machine structure and has rotated lifting with containing model machine structure, and the other end of swingle 13 is articulated with on casing 1 or casing 1 peripheral operation platform.See Fig. 9 and Figure 10, the present embodiment has four swingles 13, be articulated with the bottom in casing 1, can with Sheng sample mechanism kinematic during rotation, rise to and contact with dividing plate 3, or decline and extend out to outside casing 1 and carry out dress sample, because coal sample 11 is sometimes very heavy, so just make the operation of operating personnel more quick, reduce labour intensity.
Or in another embodiment, send sampling mechanism can be also an elevating mechanism, elevating mechanism comprises elevating screw assembly, Sheng model machine structure is connected on elevating screw assembly and also can completes elevating movement with the motion of elevating screw assembly.Whole elevating screw assembly is installed in casing 1, completes dress sample or sampling in casing 1.
Be appreciated that the present invention send the object of sampling mechanism to be to make Sheng model machine structure complete elevating movement, convenient dress sample and sampling, according to this thinking, can adopt the various mechanism design that can complete elevating movement.
Below be only the preferred embodiment of the present invention, protection scope of the present invention be not only confined to above-described embodiment, all technical schemes belonged under thinking of the present invention all belong to protection scope of the present invention.It should be pointed out that for those skilled in the art, some improvements and modifications without departing from the principles of the present invention, 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 blower fan (2), dividing plate (3), gas heater (6), the more than one Sheng model machine structure in containment housing (1), casing (1) is separated into upper chamber (101) and the lower chambers (102) of connection by described dividing plate (3), and described blower fan (2) is arranged in upper chamber (101); Described Sheng model machine structure comprise for splendid attire coal sample coal sample dish (5) and be used for collecting the coal sample holder (7) of 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 for contacting the sealing (52) coordinated with dividing plate (3), and described coal sample holder (7) is positioned at the below of coal sample dish (5); The described sampling mechanism that send is connected with Sheng model machine structure and passes in and out casing (1) with containing 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 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 one 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 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: be provided with the wind gage (9) for detecting hot blast flow velocity in described return air channel (8), described controller (4) is connected with blower fan (2) by a frequency converter (10); The wind velocity signal that described controller (4) gathers according to wind gage (9) is compared with the wind speed preset thus is adjusted the rotating speed of blower fan (2) by frequency converter (10).
4. the hot blast of sampling that can automatically send according to claim 1 or 2 or 3 penetrates internal-circulation type coal sample dehumidifying device, it is characterized in that: described coal sample holder (7) comprises connected successively support portion (71), ventilation unit (72) from top to bottom and receives sample portion (73), described coal sample dish (5) is positioned over the top of support portion (71), and described receipts sample portion (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).
6. the hot blast of sampling that can automatically send according to claim 1 or 2 or 3 penetrates internal-circulation type coal sample dehumidifying device, it is characterized in that: described in send sampling mechanism to be an elevating mechanism, elevating mechanism comprises the swingle (13) of more than, one end of described swingle (13) is connected with Sheng model machine structure and has rotated lifting with containing model machine structure, and the other end of described swingle (13) is articulated with on casing (1) or casing (1) peripheral operation platform.
7. the hot blast of sampling that can automatically send according to claim 1 or 2 or 3 penetrates internal-circulation type coal sample dehumidifying device, it is characterized in that: described in send sampling mechanism to be an elevating mechanism, elevating mechanism comprises elevating screw assembly, and described Sheng model machine structure is connected on elevating screw assembly also can complete elevating movement with the motion of elevating screw assembly.
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| CN103994912B (en) * | 2014-05-11 | 2016-10-19 | 中国矿业大学 | A kind of immersion method keeping coal sample structural intergrity |
| CN113686719B (en) * | 2021-09-08 | 2022-04-08 | 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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| JPS54150773A (en) * | 1978-05-19 | 1979-11-27 | Toshiba Corp | Dryer |
| JP2995622B2 (en) * | 1997-06-19 | 1999-12-27 | 清川 晋 | Drying method using the container unit to be dried |
| KR101186151B1 (en) * | 2010-11-30 | 2012-10-02 | 충남대학교산학협력단 | Energy saving dryer |
| CN202074791U (en) * | 2011-04-25 | 2011-12-14 | 季连祥 | Novel dryer |
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| CN2491790Y (en) * | 2001-08-11 | 2002-05-15 | 哈尔滨工业大学达通热能工程有限公司 | Efficiency full uatomatic coal dryer |
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| CN202661310U (en) * | 2012-06-26 | 2013-01-09 | 湖南三德科技发展有限公司 | Hot air penetrating circulating type coal sample dehumidifying device with automatic sample sending and taking function |
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