CN103754597B - The dedusting delivery system of loose unpacked material and carrying method - Google Patents

The dedusting delivery system of loose unpacked material and carrying method Download PDF

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Publication number
CN103754597B
CN103754597B CN201410026433.4A CN201410026433A CN103754597B CN 103754597 B CN103754597 B CN 103754597B CN 201410026433 A CN201410026433 A CN 201410026433A CN 103754597 B CN103754597 B CN 103754597B
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China
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dust
transfer point
communicated
conveyor
conveying unit
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CN103754597A (en
Inventor
付志新
梁燕均
曹瑞忠
高国双
孙占秀
张二伟
张广平
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INNER MONGOLIA DATANG INTERNATIONAL XILINHOT LIGNITE INTEGRATION DEVELOPMENT Co Ltd
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INNER MONGOLIA DATANG INTERNATIONAL XILINHOT LIGNITE INTEGRATION DEVELOPMENT Co Ltd
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Abstract

The invention provides a kind of dedusting delivery system and carrying method of loose unpacked material.Dedusting delivery system comprises the conveying unit that at least one-level is arranged in order along mass transport path, and every grade of conveying unit comprises: the first conveyer, has the first feed end and the first discharge end; Second conveyor, is communicated with the first conveyer, and has for receiving from the second feed end of the material of the first conveyer and the second discharge end for material being exported this grade of conveying unit; The transfer point closed, the first discharge end of the first conveyer and the second feed end of second conveyor stretch into transfer point, and material is passed to the second feed end of second conveyor by the first discharge end in transfer point; Chou Chen mechanism, is communicated with transfer point inside and extracts transfer point out with the material dust that will kick up; Forming machine, and takes out dirt mechanism connection to receive and the dust that Chou Chen mechanism aspirates is shaped to moulding mixture, and forming machine is communicated with to carry moulding mixture further with second conveyor or independent moulding mixture feedway transfer point is outer.

Description

The dedusting delivery system of loose unpacked material and carrying method
Technical field
The present invention relates to materials-handling technology field, in particular to dedusting delivery system and the carrying method of loose unpacked material.
Background technology
Loose unpacked material especially granular material is more particularly coal-fired in course of conveying, is attended by dirt all the time, and for brown coal, China's lignite resource enriches, and is the Appropriate application brown coal energy, needs to carry out drying to low-order coal and processes.But can produce the coal dust that a large amount of particle diameter is less than 1mm in brown coal drying process, these quality of pc are light, active good, in course of conveying, particularly in transfer point transhipment, very easily cause delivery system airborne dust serious.A large amount of coal dust gathers at defeated coal gallery, transfer point, and pile up very easily spontaneous combustion for a long time after making visbility reduction, serious harm health, pollution ambient environment, deposition, there is serious potential safety hazard, coal dust airborne dust also result in the waste of the energy simultaneously.Particularly in maximization commercial production, after dry, the fed distance of product coal is longer, and the requirement that period relates to planar design often needs to change throughput direction through multiple transfer point, and these coal dusts are being kicked up through transfer point at every turn repeatedly.Existing general deduster for coal conveying system system has the following disadvantages:
1, be not suitable for the medium that entrance concentration is higher, usually require entrance concentration not higher than 10mg/m 3, process air quantity is not higher than 100000m 3/ h.
2, the easily airborne dust industry such as inapplicable such as maximization brown coal drying.
3, existing dust pelletizing system is all be disposed on defeated device for coal again by the coal dust collected mostly, can reentrainment of dust in discharge process, and through next transfer point, these coal dusts can be kicked up again again, need repeated collection.
4, existing deduster for coal conveying system adopts mechanical vibrator mode deashing mostly, and effect is poor, and on filter bag, meeting Long-Term Sorption coal dust, exists the potential safety hazard such as spontaneous combustion, detonation.
Existing dust removing appts. of coal conveying system adopts flat bag filter mostly, be applicable to the high-quality thermal coal delivery systems such as thermal powerplant clean fine coal, bituminous coal, the coal dust amount of carrying secretly in these coals is very little, simultaneously the comparatively large also not easily airborne dust of these coal proportions, and therefore in transport process, dust emission is very little.And the industries such as such as brown coal drying and upgrading, because of low-order coal poor heat stability such as brown coal, very easily efflorescence in drying and upgrading engineering, the easy airborne dust coal dust that a large amount of particle diameters is less than 100 microns is often entrained with in product coal, usually more than 20% of total coal amount is accounted for, these coal dust light specific gravity, very easily airborne dusts.Therefore, coal handling system adopts traditional existing duster system to be difficult to thoroughly solve airborne dust problem.
Summary of the invention
The object of the present invention is to provide a kind of delivery system that can the reduce loose unpacked material more significantly especially dedusting delivery system of the loose unpacked material of coal handling system environment dust concentration and carrying method.
For achieving the above object, according to an aspect of the present invention, a kind of dedusting delivery system of loose unpacked material is provided, comprise the conveying unit that at least one-level is arranged in order along mass transport path, wherein, every grade of conveying unit comprises: the first conveyer, has the first feed end and the first discharge end; Second conveyor, is communicated with the first conveyer, and has for receiving from the second feed end of the material of the first conveyer and the second discharge end for material being exported this grade of conveying unit; The transfer point closed, the first discharge end of the first conveyer and the second feed end of second conveyor stretch in transfer point respectively, and material is passed to the second feed end of second conveyor by the first discharge end in transfer point; Chou Chen mechanism, is communicated with transfer point inside and pumps out transfer point for by the material dust kicked up; And forming machine, and take out dirt mechanism connection to receive and the dust that Chou Chen mechanism aspirates is shaped to moulding mixture, forming machine is at the outer moulding mixture being communicated with to carry this shaping further with second conveyor or independent moulding mixture feedway of transfer point.
The dedusting delivery system of loose unpacked material of the present invention, by by transfer point with take out dirt mechanism connection, and by airborne dust mechanism is communicated with forming machine, like this, when loose unpacked material is delivered to second conveyor from the first conveyer in transfer point, the dust that this loose unpacked material is kicked up pumps out transfer point through Chou Chen mechanism, and then enter in forming machine and carry out forming processes molding mass, like this, owing to even not there is airborne dust in block dust emission is very little in this shaping moulding mixture, the present invention greatly reduces the dust raising phenomenon in transmitting bulk material process.
In a preferred embodiment, every grade of conveying unit also comprises the buffer bin be communicated with between Chou Chen mechanism and forming machine.
Preferably, second conveyor has the material feeding surface accepting material, and Chou Chen mechanism comprises: be arranged on the dust shield in transfer point near material feeding surface; Be arranged on the outer and dust exhaustor is communicated with dust shield of transfer point, with by separated from the gas for the dust of suction, dust exhaustor has air extractor duct and discharging opening, and the dust that the discharging opening of dust exhaustor is communicated with to be isolated out with buffer bin is delivered to buffer bin; And the induced draft fan to be communicated with the air outlet of dust exhaustor, dust shield, dust exhaustor and induced draft fan are communicated with successively along dust suction path, induced draft fan is used for imposing swabbing action to dust shield and dust exhaustor, to produce negative pressure in dust shield and dust exhaustor, and for discharging isolated gas.
The present invention in use, when loose unpacked material is delivered to second conveyor from the first conveyer, the a large amount of dust produced make dust shield and dust exhaustor all produce negative pressure through induced draft blower withdraws, and then dust suction is entered in dust exhaustor, and in this dust exhaustor, carry out the separation of dirt gas, isolated gas is taken away through induced draft fan and is discharged, isolated dust then enters in buffer bin, enter in forming machine through this buffer bin again and carry out forming processes, adopt in this way because material isolated in this dust exhaustor enters in buffer bin in a large number, and too much material powder can not be saved bit by bit, save bit by bit powder even hardly, prevent flammable powder, as brown coal etc. are attached to for a long time on filter bag in dust exhaustor, spontaneous combustion occurs further, the phenomenons such as detonation.
Preferably, every grade of conveying unit also comprises the material discharging machine with lock airway dysfunction, and it is communicated with between dust exhaustor and buffer bin, so that the particulate dust in dust exhaustor is disposed to buffer bin.Adopt system of the present invention, owing to carrying out feeding by the material discharging machine with lock airway dysfunction between dust exhaustor and buffer bin, in this dust exhaustor, isolated material can enter in buffer bin rapidly like this, and dust exhaustor only can not save bit by bit powder as material stream passed path, efficiently avoid material such as brown coal etc. and the potential safety hazard of spontaneous combustion, detonation etc. occurs in dust exhaustor.
In order to prevent, in buffer bin, the phenomenons such as detonation occur further, preferably, buffer bin is communicated with the explosion protection preventing material generation detonation, and this explosion protection has the fairlead be communicated with at buffer bin top.
Preferably, the bottom of the sidewall of buffer bin and its powder outlet compartment of terrain are provided with to be had the accident of arranging powder function and puts powder device, powder material level control monitor unit is provided with in buffer bin, coordinate to put powder device with accident, with when the most high charge level of controlling level higher than setting by this accident put powder device put powder with by Level control in setting range.
Adopt system of the present invention, too much material is saved bit by bit when exceeding the maximum height of setting in buffer bin when an accident occurs, powder material level control monitor unit can send signal, after system acceptance to signal, control accident is put powder device and is carried out putting powder, or operator opens accident after receiving signal puts powder device and carries out putting powder, so that the powder amount in buffer bin is controlled, in the setting range of safety, to ensure that the safety of system further.
Preferably, the dedusting delivery system of loose unpacked material also comprises material blanking tube, it is communicated with between the first discharge end and the second feed end, material is delivered to second conveyor by material blanking tube from the first conveyer, the dedusting delivery system of loose unpacked material also comprises the drifting dust processing equipment being arranged on material blanking tube place, to be separated in moulding mixture by the powder in the loose unpacked material be transferred.
Preferably, the dedusting delivery system of loose unpacked material comprises multistage conveying unit, the second conveyor of previous stage conveying unit forms the first conveyer of the rear stage conveying unit that continues, and the second conveyor of rear stage conveying unit forms again the first conveyer of its rear stage conveying unit that continues again.
Preferably, material is brown coal.
According to a further aspect in the invention, provide a kind of transmitting bulk material method, for utilizing the dedusting delivery system of above-mentioned loose unpacked material to carry out mass transport, the method comprises:
-the first conveyer close transfer point in by transmitting bulk material to second conveyor, utilize aspirating mechanism that dust suction is gone out this transfer point simultaneously;
-dust be pumped in this aspirating mechanism is delivered in forming machine to be shaped to moulding mixture;
-moulding mixture after shaping is delivered to next stage conveying unit through the conveying unit of this grade or is delivered to accumulator plant through independent moulding mixture feedway.
Therefore, the dedusting delivery system of loose unpacked material of the present invention and carrying method, by by transfer point with take out dirt mechanism connection, and by airborne dust mechanism is communicated with forming machine, like this, when loose unpacked material is delivered to second conveyor from the first conveyer in transfer point, the dust that this loose unpacked material is kicked up pumps out transfer point through Chou Chen mechanism, and then enter in forming machine and carry out forming processes molding mass, like this, owing to even not there is airborne dust in block dust emission is very little in this shaping moulding mixture, the present invention greatly reduces the dust raising phenomenon in transmitting bulk material process.
Accompanying drawing explanation
Below, describe embodiments of the invention in detail by reference to the accompanying drawings, wherein:
Fig. 1 is the structural representation of the dedusting delivery system of loose unpacked material.
Detailed description of the invention
As shown in Figure 1, the dedusting delivery system of a kind of loose unpacked material of the present embodiment, comprise the multistage conveying unit be arranged in order along mass transport path, every grade of conveying unit comprises the first closed conveyer 1, the second conveyor 9 closed, the transfer point closed, Chou Chen mechanism and forming machine 7.Wherein, the first conveyer 1 has the first feed end and the first discharge end.Second conveyor 9 is communicated with the first conveyer 1, and has for receiving from the second feed end of the material of the first conveyer 1 and the second discharge end for material being exported this grade of conveying unit.First discharge end of the first conveyer 1 and the second feed end of second conveyor 9 stretch in transfer point respectively, and material is passed to the second feed end of second conveyor 9 by the first discharge end in transfer point.Chou Chen mechanism pumps out transfer point with transfer point inner connection for by the material dust kicked up.Forming machine 7 with take out dirt mechanism connection to receive and the dust that Chou Chen mechanism aspirates is shaped to moulding mixture, forming machine 7 is communicated with the moulding mixture carrying this shaping further outward with second conveyor 9 or independent moulding mixture feedway at transfer point.Wherein, the second conveyor 9 of previous stage conveying unit forms the first conveyer 1 of the rear stage conveying unit that continues, and the second conveyor 9 of rear stage conveying unit forms again the first conveyer 1 of its rear stage conveying unit that continues again.Of course it is to be understood that the present embodiment also only can only have one-level conveying unit, this does not depart from protection scope of the present invention.
The dedusting delivery system of the loose unpacked material of the present embodiment, by by transfer point with take out dirt mechanism connection, and by airborne dust mechanism is communicated with forming machine 7, like this, when loose unpacked material is delivered to second conveyor 9 from the first conveyer 1 in transfer point, the dust that this loose unpacked material is kicked up pumps out transfer point through Chou Chen mechanism, and then enter in forming machine 7 and carry out forming processes molding mass, like this, owing to even not there is airborne dust in block dust emission is very little in this shaping moulding mixture, greatly reduce the dust raising phenomenon in transmitting bulk material process, reduce environmental pollution and eliminate potential safety hazard.
As a kind of preferred implementation, second conveyor 9 in the present embodiment has the material feeding surface accepting material, and Chou Chen mechanism comprises near the surperficial dust shield 3 be arranged in transfer point of material feeding, is arranged on outside transfer point and the dust exhaustor 4 be communicated with dust shield 3 and the induced draft fan 5 be communicated with the air outlet of dust exhaustor 4.Wherein, dust exhaustor 4 is separated from the gas for the dust that will suck, and dust exhaustor 4 has air extractor duct and discharging opening, and the dust that discharging opening and the forming machine 7 of dust exhaustor 4 are communicated with to be isolated out is delivered to forming machine 7.Dust shield 3, dust exhaustor 4 and induced draft fan 5 are communicated with successively along dust suction path, induced draft fan 5 for imposing swabbing action to dust shield 3 and dust exhaustor 4, to produce negative pressure in dust shield 3 and dust exhaustor 4, and for discharging isolated gas.
Preferably, every grade of conveying unit also comprises the buffer bin 10 be communicated with between the discharging opening and forming machine 7 of dust exhaustor 4.Preferably, dust exhaustor 4 is sack cleaners 4, and sack cleaner 4 comprises the dust exhaustor body with hopper and for the dust in dust exhaustor 4 being blown the low-pressure gas back-blowing mechanism to dust exhaustor 4 hopper.The preferred tapered setting of buffer bin 10, and do chamfered therein or go out to install arc plate additional at turning, angle between the sidewall of buffer bin 10 and horizontal surface is preferably greater than 70 °, with outputting material quickly, and preferably in dust exhaustor 4 and in buffer bin 10 all without horizontal structure with mode laying dust.
The present embodiment in use, when loose unpacked material is delivered to second conveyor 9 from the first conveyer 1, the a large amount of dust produced make dust shield 3 and dust exhaustor 4 all produce negative pressure through induced draft fan 5 suction, and then dust suction is entered in dust exhaustor 4, and the separation of dirt gas is carried out in this dust exhaustor 4, isolated gas is taken away through induced draft fan 5 and is discharged, isolated dust then enters in buffer bin 10, enter in forming machine 7 through this buffer bin 10 again and carry out forming processes, adopt in this way because isolated material in this dust exhaustor 4 enters in buffer bin 10 in a large number, and too much material powder can not be saved bit by bit, save bit by bit powder even hardly, flammable powder such as brown coal etc. are prevented to be attached to as spontaneous combustion occurs its filter bag in dust exhaustor 4 for a long time further, the phenomenons such as detonation.
Preferably, every grade of conveying unit also comprises the material discharging machine 6 with lock airway dysfunction, and it is communicated with between dust exhaustor 4 and buffer bin 10, so that the particulate dust in dust exhaustor 4 is disposed to buffer bin 10.Adopt the system of the present embodiment, owing to carrying out feeding by having the material discharging machine 6 locking airway dysfunction between dust exhaustor 4 and buffer bin 10, in this dust exhaustor 4, isolated material can enter in buffer bin 10 rapidly like this, and dust exhaustor 4 only can not save bit by bit powder as material stream passed path, efficiently avoid the potential safety hazard of material as generation spontaneous combustion, detonations etc. in dust exhaustor 4 such as brown coal.Material discharging machine 6 can be such as the device such as star-shaped discharge valve, flap valve with lock airway dysfunction.
In order to prevent, in buffer bin, the phenomenons such as detonation occur further, preferably, buffer bin 10 is communicated with the explosion protection (not shown) preventing material generation detonation, and this explosion protection has the fairlead (not shown) be communicated with at buffer bin 10 top.The fairlead of this explosion protection preferably and between the top of buffer bin 10 folded acute angle be more than or equal to 70 °, to prevent from further, on this fairlead, laying dust phenomenon occurs.
In order to control controlling level in buffer bin 10, the most high charge level value being preferably provided with in this buffer bin 10 that safety allows also is provided with suitable low material level value, and being provided with powder material level control monitor unit (not shown), it comprises high charge level control monitor unit and low level monitoring device.Preferably, the bottom of the sidewall of buffer bin 10 and its powder outlet compartment of terrain be also provided with have the accident of arranging powder function put powder device (not shown) with controlling level higher than during the most high charge level set by this accident put powder device put powder with by Level control in setting range.The present embodiment puts powder device by setting up accident, and make coal dust rapid deflation in the state of accident, coal dust is less than 1 hour in the storage time of buffer bin 10, and the row's of increasing powder speed, ensure that security of system greatly.
Adopt the system of the present embodiment, when high charge level control monitor unit monitor material level in buffer bin 10 higher than the most high charge level allowed after, just by sending signal to the control system of system, control system just controls this accident and puts powder device and carry out putting powder, so that Level control is most between high charge level value and low material level value at this, to ensure safety.Certain powder material level control monitor unit, also by the alert notification operating personal such as such as sounding, being put powder device carry out putting powder to be operated this accident after this operating personal receives.
Preferably, buffer bin 10 is also communicated with the inert gas shielding mechanism (not shown) for being filled with unreactable gas in this buffer bin 10, and buffer bin 10 is communicated with forming machine 7 by row's powder device with lock airway dysfunction.
Preferably, the dedusting delivery system of loose unpacked material also comprises material blanking tube 2, and it is communicated with between the first discharge end and the second feed end, and material is delivered to second conveyor 9 by material blanking tube 2 from the first conveyer 1.Dust shield 3 is preferably arranged near the material feeding surface of the material outlet of material blanking tube 2 and second conveyor 9.The dedusting delivery system of loose unpacked material also comprises the drifting dust processing equipment being arranged on material blanking tube 2 place, to be separated in moulding mixture by the powder in the loose unpacked material be transferred.Preferably, drifting dust processing equipment is pneumatic separation device or ventilation disturbance device, like this, the coal dust making to be mixed in product coal by setting up the mode such as selection by winnowing or ventilation disturbance in the material blanking tube position of first transfer point all carries out being gathered into type after first transfer point or the blowout of first and second transfer point, thus no longer there is serious airborne dust at follow-up transfer point because of coal dust free, substantially increase efficiency of dust collection, provide cost savings.
Present invention also offers a kind of transmitting bulk material method, it carries out mass transport for utilizing according to the dedusting delivery system of above-mentioned loose unpacked material, and the method comprises:
-the first conveyer 1 close transfer point in by transmitting bulk material to second conveyor 9, utilize aspirating mechanism that dust suction is gone out this transfer point simultaneously;
-dust be pumped in this aspirating mechanism is delivered in forming machine 7 to be shaped to moulding mixture;
-moulding mixture after shaping is delivered to next stage conveying unit through the conveying unit of this grade or is delivered to accumulator plant through independent moulding mixture feedway.
In order to explain the present invention better, the present invention will be introduced further for brown coal drying industry below.
For this reason, the invention provides a kind of dedusting delivery system that can be used for the loose unpacked material solving coal dust airborne dust, comprise following structure and step:
(1) each transfer point is sent into from the product coal after the process of reactor drying through enclosed first conveyer 1;
(2) a set of coal powder collection-formation system independently set up by each transfer point, comprises dust shield 3, dust sucting pipeline, sack cleaner, forming machine 7, induced draft fan 5, material discharging machine 6, control system etc.;
(3) coal dust kicked up in transport process of product coal is under the effect of induced draft fan 5, and near dust shield 3, produce negative pressure, the coal dust kicked up is inhaled into dust sucting pipeline and enters sack cleaner (or also can be called as coal collector);
(4) material discharging machine 6 of the coal dust collected by coal collector through having lock airway dysfunction delivers to the buffering hopper 10 at forming machine 7 top, adopts metering device that coal dust is evenly sent into forming machine 7 bottom buffering hopper 10;
(5) coal dust entering forming machine 7 forms the moulded coal 8 with definite shape and cold strength through punching press, moulded coal 8 delivers to product coal yard by discharge device.
The first conveyer 1 in the present embodiment and second conveyor 9 can be embedded scraper transporters, also can be the belt conveyer with sealing arrangement, its objective is and make product coal directly not be exposed to the external world, avoid producing airborne dust in course of conveying and windproofly to take shelter from rain, also make whole dedusting delivery system have leakproofness simultaneously, strengthen the dust removal ability of dust shield 3, and make this dedusting delivery system inside produce certain negative pressure, prevent coal dust to kick up excessive contaminated environment.
Preferably, the length of the material blanking tube 2 in transfer point is not less than 2 meters from the material feeding surface of second conveyor 9, preferred employing curve coal spout or there is the straight tube pipe of constant slope, angle between the material feeding surface of material blanking tube 2 line of centers and second conveyor 9 is not less than 45 ° and is not more than 80 °, its objective is that to make coal flow path direction consistent with the service direction of second conveyor 9, weaken induced air, airborne dust point is moved forward, strengthen the pick-up performance of dust shield 3.
Preferably, dust shield 3 position is in the conveying downstream of material blanking tube 2, and the upstream extremity along mass transport of dust shield 3 connects with the downstream end of material blanking tube 2, and dust shield 3 length is not less than 2 meters.
Preferably, there is not horizontal segment in the dust sucting pipeline between dust shield 3 and sack cleaner, and to prevent coal dust from depositing spontaneous combustion, preferably, the angle between this dust sucting pipeline and junction of sack cleaner is not less than 30 °, to increase delivery rate.In pipe, gas flow rate preferably controls at 15-30m/s.
Preferably, sack cleaner (coal collector) is pulse bag type dust collector, and its inside does not preferably exist any dead angle, piles up spontaneous combustion to prevent coal dust.
Preferably, forming machine 7 is impact briquetting machine (forming pressure is not less than 250t), and technology adopts binder free high-pressure molding technology, and ratio of briquetting is not less than 99.9%, and moulded coal 8 cold strength is not less than 500N.Certainly also passable according to other pattern equipment such as pair roller type forming machines, just need screening, the circulation secondary forming machine of setting up not shaping coal dust.
After coal dust is shaped to moulded coal 8 in forming machine 7, just this moulded coal 8 is carried in following two kinds of modes: a kind of be shaping after moulded coal 8 directly deliver on readymade coal feedway, deliver to coal yard together with after mixing with readymade coal; Another kind be each transfer point shaping after moulded coal 8 deliver to coal yard separately through moulded coal feedway, as another kind of product coal.
The present invention is compared with traditional transfer point dust pelletizing system, adopt at each transfer point and collect-moulding integrated distributing depression dust-removing technology, coal dust direct punch forming after collecting of kicking up can be made to make moulded coal, fundamentally disposablely solve fine coal state, thus avoid repeated collection, repeated contamination in transport process, compressing moulded coal is in secondary transhipment or can not again because airborne dust and contaminated environment in having bad luck, and the tendency of spontaneous combustion simultaneously also significantly reduces.
Compared with each transfer point airborne dust centralized collection disposal system, each airborne dust point coal dust needs through long distance delivery usually to catcher, be difficult to avoid delivery duct not occur horizontal segment, once occur that horizontal segment just easily accumulated powder occurs, then there is the accidents such as pipeline detonation, each transfer point is apart from inconsistent simultaneously, is also difficult to the dust removing effects ensureing each dust sucting point.Coal dust fed distance of the present invention is short, fast fine coal is become moulded coal at each transfer point, and then concentrates conveying, eliminates the hidden danger that coal dust brings because of long distance delivery, also can better control and ensure the dust removing effects of each dust sucting point.In addition, be pressed into moulded coal by after coal powder collection, also widened the market channel of product further, also obviate or mitigate airborne dust situation when rear on-carriage and product user use transhipment simultaneously from source.
In a specific embodiment, as shown in Figure 1, dried brown coal deliver to 1# transfer point through closed first conveyer 1, drop on enclosed second conveyor 9 through material blanking tube 2.In this transport process, owing to fall and in managing under induced air effect, when after drying, brown coal fall at second conveyor 9, material blanking tube 2 exit can produce airborne dust, and the negative pressure that these coal dusts kicked up produce through induced draft fan 5 enters in pulse bag type dust collector from dust shield 3.
Pulse bag type dust collector comprises sack cleaner body and low-pressure gas blowback system, collect the coal dust contained in fluid thus, and convection cell carries out purifying treatment.Described low-pressure gas blowback system (not shown), adopts low-pressure air or nitrogen to blow off the coal dust collected in sack cleaner bottom hopper as purge gas.Purified gas is discharged from induced draft fan 5.
The air intake vent of induced draft fan 5 is communicated with sack cleaner, and the effect of induced draft fan 5 produces negative pressure in dust shield 3, sack cleaner, ensures that the coal dust kicked up all sucks in sack cleaner.
The coal dust dropped down onto in sack cleaner bottom hopper enters forming machine 7 top buffer bin 10 through material discharging machine 6, and these coal dusts are pressed into the moulded coal 8 with definite shape and intensity by forming machine 7.
Described material discharging machine 6 is the conventional equipment such as star-shaped discharge valve, flap valve with lock airway dysfunction.
Described forming machine 7 is a kind of impact briquetting machine, and it adopts binder free high-pressure molding technology, makes ratio of briquetting be not less than 99.9%, and moulded coal cold strength is not less than 500N.
The moulded coal 8 be pressed into directly drops on second conveyor 9 and delivers to next transfer point or coal yard.
In an alternative embodiment of the invention, the moulded coal 8 that each transfer point is pressed into can disperse to deposit each transfer point as another kind of product separately, finally the moulded coal 8 of all transfer points is unified collection again and is stored together; Or also can store separately by being delivered to coal yard in band conveyor Unified Set.
Example 1
1, dried brown coal deliver to 1# transfer point through enclosed first conveyer 1, drop on enclosed second conveyor 9 through material blanking tube 2.
2, the negative-pressure gas that the coal dust that kick up in material blanking tube 2 exit produces with induced draft fan 5 enters in pulse bag type dust collector from dust shield 3.
3, the coal dust collected drops down onto in sack cleaner bottom hopper, and purified gas is discharged from induced draft fan 5.
4, the coal dust dropped down onto in sack cleaner bottom hopper enters forming machine 7 top buffer bin 10 through material discharging machine 6, and these coal dusts are pressed into the moulded coal 8 with definite shape and intensity by forming machine 7.
5, the moulded coal 8 be pressed into directly drops on second conveyor 9 and delivers to next transfer point or coal yard.
Example 2
1, dried brown coal deliver to 1# transfer point through closed first conveyer 1, drop on enclosed second conveyor 9 through material blanking tube 2.
2, the negative-pressure gas that the coal dust that kick up in material blanking tube 2 exit produces with induced draft fan 5 enters in pulse bag type dust collector from dust shield 3.
3, the coal dust collected drops down onto in sack cleaner bottom hopper, and purified gas is discharged from induced draft fan 5.
4, the coal dust dropped down onto in sack cleaner bottom hopper enters forming machine 7 top buffer bin 10 through material discharging machine 6, and these coal dusts are pressed into the moulded coal 8 with definite shape and intensity by forming machine 7.
5, the moulded coal 8 that the moulded coal 8,2# transfer point and other transfer points that are pressed at 1# transfer point are pressed into delivers to coal yard through band conveyor unification separately.
In sum, the dedusting delivery system of loose unpacked material of the present invention and carrying method, by by transfer point with take out dirt mechanism connection, and by airborne dust mechanism is communicated with forming machine 7, like this, when loose unpacked material is delivered to second conveyor 9 from the first conveyer 1 in transfer point, the dust that this loose unpacked material is kicked up pumps out transfer point through Chou Chen mechanism, and then enter in forming machine 7 and carry out forming processes molding mass, like this, owing to even not there is airborne dust in block dust emission is very little in this shaping moulding mixture, the present invention greatly reduces the dust raising phenomenon in transmitting bulk material process.
Describe embodiments of the invention, will be easy to accomplish various change, amendment and improvement concerning general technical staff of the technical field of the invention.Such as, induced draft fan, sack cleaner and forming machine that the size of dust emission can select difference to exert oneself is considered.Also can implement the present invention at some transfer points, or implement the present invention at front several transfer point, when the coal dust in readymade coal is after the collection of several transfer point is shaping, dust emission is very little just can no longer collect shaping.Therefore, description above is only not intended as restriction of the present invention as an example.

Claims (10)

1. a dedusting delivery system for loose unpacked material, comprises the conveying unit that at least one-level is arranged in order along mass transport path, it is characterized in that, every grade of described conveying unit comprises:
First conveyer (1), has the first feed end and the first discharge end;
Second conveyor (9), be communicated with described first conveyer (1), and have for receiving from the second feed end of the material of described first conveyer (1) and the second discharge end for described material being exported this grade of conveying unit;
The transfer point closed, first discharge end of described first conveyer (1) and the second feed end of described second conveyor (9) stretch in described transfer point respectively, and material is passed to the second feed end of described second conveyor (9) by described first discharge end in described transfer point;
Chou Chen mechanism, is communicated with described transfer point inside and pumps out described transfer point for by the material dust kicked up;
Forming machine (7), with described dirt mechanism connection of taking out to receive and the dust that Chou Chen mechanism aspirates is shaped to moulding mixture, described forming machine (7) is at the outer moulding mixture being communicated with to carry this shaping further with described second conveyor (9) or independent moulding mixture feedway of described transfer point; And
Material blanking tube (2), this material blanking tube is curve coal spout or the straight pipe with constant slope; Wherein,
Described second conveyor (9) has the material feeding surface accepting material, and described Chou Chen mechanism comprises near the surperficial dust shield (3) be arranged in described transfer point of described material feeding.
2. system according to claim 1, is characterized in that, every grade of described conveying unit also comprises the buffer bin (10) be communicated with between described Chou Chen mechanism and described forming machine (7).
3. system according to claim 2, is characterized in that, described Chou Chen mechanism also comprises:
Be arranged on the outer and dust exhaustor (4) be communicated with described dust shield (3) of described transfer point, separated from the gas with the dust that will suck, described dust exhaustor (4) has air extractor duct and discharging opening, and the dust that discharging opening and the described buffer bin (10) of described dust exhaustor (4) are communicated with to be isolated out is delivered to described buffer bin (10); And
The induced draft fan (5) be communicated with the air outlet of described dust exhaustor (4), described dust shield (3), described dust exhaustor (4) and described induced draft fan (5) are communicated with successively along dust suction path, described induced draft fan (5) is for imposing swabbing action to described dust shield (3) and described dust exhaustor (4), to produce negative pressure in described dust shield (3) and described dust exhaustor (4), and for discharging isolated gas.
4. system according to claim 3, it is characterized in that, every grade of described conveying unit also comprises the material discharging machine (6) with lock airway dysfunction, it is communicated with between described dust exhaustor (4) and described buffer bin (10), so that the particulate dust in described dust exhaustor (4) is disposed to described buffer bin (10).
5. system according to claim 2, is characterized in that, described buffer bin (10) is communicated with the explosion protection preventing material generation detonation, and this explosion protection has the fairlead be communicated with at described buffer bin (10) top.
6. system according to claim 2, it is characterized in that, the bottom of the sidewall of described buffer bin (10) and its powder outlet compartment of terrain are provided with to be had the accident of arranging powder function and puts powder device, described buffer bin is provided with powder material level control monitor unit in (10), coordinate to put powder device with described accident, with when the most high charge level of controlling level higher than setting by this accident put powder device put powder with by Level control in setting range.
7. system according to claim 1, it is characterized in that, described material blanking tube (2) is communicated with between described first discharge end and the second feed end, material is delivered to described second conveyor (9) by described material blanking tube (2) from described first conveyer (1), the dedusting delivery system of described loose unpacked material also comprises the drifting dust processing equipment being arranged on described material blanking tube (2) place, to be separated in moulding mixture by the powder in the loose unpacked material be transferred.
8. system according to claim 1, it is characterized in that, the dedusting delivery system of described loose unpacked material comprises multistage described conveying unit, the second conveyor (9) of previous stage conveying unit forms first conveyer (1) of the rear stage conveying unit that continues, and the second conveyor (9) of described rear stage conveying unit forms again first conveyer (1) of its rear stage conveying unit that continues again.
9. system according to any one of claim 1 to 8, is characterized in that, described material is brown coal.
10. a transmitting bulk material method, is characterized in that, for utilizing the dedusting delivery system of loose unpacked material according to any one of claim 1 to 9 to carry out mass transport, the method comprises:
-the first conveyer (1) close transfer point in by transmitting bulk material to second conveyor (9), utilize aspirating mechanism that dust suction is gone out this transfer point simultaneously;
-dust be pumped in this aspirating mechanism is delivered in forming machine (7) to be shaped to moulding mixture;
-moulding mixture after shaping is delivered to next stage conveying unit through the conveying unit of this grade or is delivered to accumulator plant through independent moulding mixture feedway.
CN201410026433.4A 2014-01-21 2014-01-21 The dedusting delivery system of loose unpacked material and carrying method Expired - Fee Related CN103754597B (en)

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CN109467305A (en) * 2019-01-15 2019-03-15 中国建材国际工程集团有限公司 It is a kind of gather dust after glass powder recyclable device
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CN111646100A (en) * 2019-11-25 2020-09-11 泰富重工制造有限公司 Power supply system for long-distance belt conveyor
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