CN103754597A - Dedusting delivery system and method for bulk materials - Google Patents
Dedusting delivery system and method for bulk materials Download PDFInfo
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- CN103754597A CN103754597A CN201410026433.4A CN201410026433A CN103754597A CN 103754597 A CN103754597 A CN 103754597A CN 201410026433 A CN201410026433 A CN 201410026433A CN 103754597 A CN103754597 A CN 103754597A
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Abstract
The invention provides a dedusting delivery system and method for bulk materials. The dedusting delivery system comprises at least one material conveying unit, wherein all the material conveying units are arranged in sequence along a material conveying path. Each material conveying unit comprises a first conveyor, a second conveyor, a closed transfer station, a dust extraction mechanism and a forming machine, wherein the first conveyor is provided with a first feed end and a first discharge end; the second conveyor is communicated with the first conveyor and is provided with a second feed end used for receiving the materials from the first conveyor and a second discharge end used for discharging the materials out of the material conveying unit; the first discharge end of the first conveyor and the second feed end of the second conveyor extend into the transfer station, and the first discharge end transfers the materials to the second feed end of the second conveyor in the transfer station; the dust extraction mechanism is communicated with the inside of the transfer station so as to draw raised material dust out of the transfer station; the forming machine is communicated with the dust extraction mechanism so as to receive and form the dust extracted by the dust extraction mechanism into profile materials, and the forming machine is communicated with the second conveyor or an independent profile material conveying device outside the transfer station so as to further convey the profile materials.
Description
Technical field
The present invention relates to mass transport technical 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 all the time dirt, and take brown coal as example, China's lignite resource is abundant, for rationally utilizing the brown coal energy, need to be dried processing to low-order coal.But can produce the coal dust that a large amount of particle diameters are 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 dusts gather at defeated coal gallery, transfer point, make to pile up for a long time very easily spontaneous combustion after visbility reduction, serious harm health, pollution ambient environment, deposition, have serious potential safety hazard, and coal dust airborne dust has also caused the waste of the energy simultaneously.Particularly after maximizing in industry production, being dried, the fed distance of product coal is longer, and the requirement that relates to during this time planar design often needs to change throughput direction through multiple transfer points, and these coal dusts are repeatedly kicked up when each process transfer point.Existing general deduster for coal conveying system system has the following disadvantages:
1, be not suitable for the medium that entrance concentration is higher, conventionally require entrance concentration not higher than 10mg/m
3, process air quantity not higher than 100000m
3/ h.
2, inapplicable easy airborne dust industries such as maximization brown coal drying.
3, existing dust pelletizing system is all that the coal dust of collecting is disposed on defeated device for coal again mostly, meeting reentrainment of dust in discharge process, and when through next transfer point, these coal dusts can be kicked up 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 hazards 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, and these coal proportions are more also difficult for airborne dust simultaneously, and therefore in transport process, dust emission is very little.And industries 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, in product coal, often carrying the easy airborne dust coal dust that a large amount of particle diameters is less than 100 microns secretly, conventionally account for the more than 20% of total coal amount, 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 especially dedusting delivery system and carrying method of the loose unpacked material of coal handling system environment dust concentration of delivery system that can reduce more significantly loose unpacked material.
For achieving the above object, according to an aspect of the present invention, provide a kind of dedusting delivery system of loose unpacked material, 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 with for material being exported to the second discharge end of this grade of conveying unit; The transfer point of sealing, the first discharge end of the first conveyer and the second feed end of second conveyor stretch into respectively in transfer point, and the first discharge end is passed to material the second feed end of second conveyor in transfer point; Chou Chen mechanism, with transfer point internal communication for the material dust of kicking up is pumped out to transfer point; And forming machine, and take out dirt mechanism connection to receive and the dust of Chou Chen mechanism suction is shaped to moulding mixture, forming machine is communicated with further to carry the moulding mixture of this moulding outside transfer point with second conveyor or independent moulding mixture feedway.
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 in transfer point when the first conveyer is delivered to second conveyor, the dust that this loose unpacked material is kicked up pumps out transfer point through Chou Chen mechanism, and then enter and in forming machine, carry out forming processes molding mass, like this, the moulding mixture of this moulding is owing to being the very little airborne dust that even do not occur of block dust emission, and 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 being communicated with between Chou Chen mechanism and forming machine.
Preferably, second conveyor has the material feeding surface of accepting material, and Chou Chen mechanism comprises: near material feeding surface, be arranged on the dust shield in transfer point; Be arranged on the dust exhaustor that transfer point is outer and is communicated with dust shield, with by separated from the gas 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 being 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 dust shield and dust exhaustor to impose swabbing action, 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 when the first conveyer is delivered to second conveyor, the a large amount of dust that produce 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 and is discharged through induced draft fan, isolated dust enters in buffer bin, through this buffer bin, enter and in forming machine, carry out forming processes again, adopt in this way because isolated material in this dust exhaustor enters in buffer bin in a large number, and can not save bit by bit too much material powder, save bit by bit even hardly powder, further prevented that flammable powder is attached to for a long time on filter bag and spontaneous combustion occurs as brown coal etc. in dust exhaustor, 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 saved bit by bit powder as material stream passed path, effectively avoided material the potential safety hazard of spontaneous combustion, detonation etc. to occur in dust exhaustor as brown coal etc.
In order further to prevent, in buffer bin, the phenomenons such as detonation occur, preferably, buffer bin is communicated with the explosion protection that prevents material generation detonation, and this explosion protection has the fairlead being 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 the accident with row's powder function and put powder device, in buffer bin, be provided with powder material level control monitor unit, to put powder device with accident, coordinate, with controlling level higher than set high charge level time by this accident, put powder device and put powder so that material level is controlled in setting range.
Adopt system of the present invention, when saving bit by bit too much material in the buffer bin when having an accident and exceeding the maximum height of setting, powder material level control monitor unit can send signal, system receives after signal control accident and puts powder device and put powder, or operator receives that opening accident after signal puts powder device and put powder, so that the powder amount in buffer bin is controlled in safe setting range, guaranteed further the safety of system.
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 that is arranged on material blanking tube place, so that the powder in the loose unpacked material being transferred is separated in moulding mixture.
Preferably, the dedusting delivery system of loose unpacked material comprises multistage conveying unit, the first conveyer of one-level conveying unit after the second conveyor formation of previous stage conveying unit continues, the second conveyor of rear one-level conveying unit forms again its first conveyer of rear one-level conveying unit again that continues.
Preferably, material is brown coal.
According to a further aspect in the invention, provide a kind of transmitting bulk material method, for the dedusting delivery system of utilizing above-mentioned loose unpacked material, carried out mass transport, the method comprises:
The-the first conveyer sealing transfer point in by transmitting bulk material to second conveyor, utilize aspirating mechanism that dust suction is gone out to this transfer point simultaneously;
-dust being pumped in this aspirating mechanism is delivered in forming machine to be shaped to moulding mixture;
-moulding mixture after moulding be delivered to next stage conveying unit through the conveying unit of this grade or be delivered to accumulator plant through independent moulding mixture feedway.
Therefore, dedusting delivery system and the carrying method 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 in transfer point when the first conveyer is delivered to second conveyor, the dust that this loose unpacked material is kicked up pumps out transfer point through Chou Chen mechanism, and then enter and in forming machine, carry out forming processes molding mass, like this, the moulding mixture of this moulding is owing to being the very little airborne dust that even do not occur of block dust emission, and the present invention greatly reduces the dust raising phenomenon in transmitting bulk material process.
Accompanying drawing explanation
Below, describe by reference to the accompanying drawings embodiments of the invention in detail, wherein:
Fig. 1 is the structural representation of the dedusting delivery system of loose unpacked material.
The specific embodiment
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 being arranged in order along mass transport path, every grade of conveying unit comprises the first conveyer 1 of sealing, the second conveyor 9 of sealing, transfer point, Chou Chen mechanism and the forming machine 7 of sealing.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 with for material being exported to the second discharge end of this grade of conveying unit.The first discharge end of the first conveyer 1 and the second feed end of second conveyor 9 stretch into respectively in transfer point, and the first discharge end is passed to material the second feed end of second conveyor 9 in transfer point.Chou Chen mechanism and transfer point internal communication are for pumping out transfer point by the material dust of kicking up.Forming machine 7 with take out dirt mechanism connection to receive and the dust of Chou Chen mechanism suction is shaped to moulding mixture, forming machine 7 is communicated with further to carry the moulding mixture of this moulding outside transfer point with second conveyor 9 or independent moulding mixture feedway.Wherein, the first conveyer 1 of one-level conveying unit after second conveyor 9 formations of previous stage conveying unit continue, the second conveyor 9 of rear one-level conveying unit forms again its first conveyer 1 of rear one-level conveying unit again that continues.Of course it is to be understood that the present embodiment also can only 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 in transfer point when the first conveyer 1 is delivered to second conveyor 9, the dust that this loose unpacked material is kicked up pumps out transfer point through Chou Chen mechanism, and then enter and in forming machine 7, carry out forming processes molding mass, like this, the moulding mixture of this moulding is owing to being the very little airborne dust that even do not occur of block dust emission, greatly reduce the dust raising phenomenon in transmitting bulk material process, reduce environmental pollution and eliminated potential safety hazard.
As a kind of preferred implementation, second conveyor 9 in the present embodiment has the material feeding surface of accepting material, and Chou Chen mechanism comprises near material feeding surface and is arranged on dust shield 3 in transfer point, is arranged on transfer point outer and the dust exhaustor 4 being communicated with dust shield 3 and the induced draft fan 5 being communicated with the air outlet of dust exhaustor 4.Wherein, dust exhaustor 4 for by suck dust separated from the gas, dust exhaustor 4 has air extractor duct and discharging opening, the dust that the discharging opening of dust exhaustor 4 is communicated with to be isolated out with forming machine 7 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, and induced draft fan 5 is for dust shield 3 and dust exhaustor 4 are imposed to swabbing action, with in dust shield 3 and the interior generation negative pressure of dust exhaustor 4, and for discharging isolated gas.
Preferably, every grade of conveying unit also comprises the buffer bin 10 being communicated with between discharging opening and the forming machine 7 of dust exhaustor 4.Preferably, dust exhaustor 4 is sack cleaners 4, and sack cleaner 4 comprises having the dust exhaustor body of hopper and for the dust in dust exhaustor 4 is blown to the low-pressure gas back-blowing mechanism of dust exhaustor 4 hoppers.The preferred tapered setting of buffer bin 10, and do chamfered therein or at turning, go out to install additional arc plate, angle between sidewall and the horizontal surface of buffer bin 10 is preferably greater than 70 °, with outputting material quickly, and preferably in dust exhaustor 4 and buffer bin 10 interior all without horizontal structure with mode laying dust.
The present embodiment in use, when loose unpacked material is when the first conveyer 1 is delivered to second conveyor 9, the a large amount of dust that produce make dust shield 3 and dust exhaustor 4 all produce negative pressure through induced draft fan 5 suctions, and then dust suction is entered in dust exhaustor 4, and in this dust exhaustor 4, carry out the separation of dirt gas, isolated gas is taken away and is discharged through induced draft fan 5, isolated dust enters in buffer bin 10, through this buffer bin 10, enter and in forming machine 7, carry out forming processes again, adopt in this way because the interior isolated material of this dust exhaustor 4 enters in buffer bin 10 in a large number, and can not save bit by bit too much material powder, save bit by bit even hardly powder, further prevented flammable powder as brown coal etc. dust exhaustor 4 is interior be attached to for a long time as its filter bag on and there is spontaneous combustion, 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 the material discharging machine 6 with lock airway dysfunction between dust exhaustor 4 and buffer bin 10, the interior isolated material of this dust exhaustor 4 can enter in buffer bin 10 rapidly like this, and dust exhaustor 4 only can not saved bit by bit powder as material stream passed path, effectively avoided material if brown coal etc. are in the potential safety hazard of the interior generation spontaneous combustion of dust exhaustor 4, detonation etc.Material discharging machine 6 can be for example the device such as star-shaped discharge valve, flap valve with lock airway dysfunction.
In order further to prevent, in buffer bin, the phenomenons such as detonation occur, preferably, buffer bin 10 is communicated with the explosion protection (not shown) that prevents material generation detonation, and this explosion protection has the fairlead (not shown) being communicated with at buffer bin 10 tops.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 that further laying dust phenomenon occurs on this fairlead.
In order to control the interior controlling level of buffer bin 10, the high charge level value that is preferably provided with in this buffer bin 10 that safety allows is also 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 the accident with row's powder function put powder device (not shown) with controlling level higher than set high charge level time by this accident, put powder device and put powder so that material level is controlled in setting range.The present embodiment, by setting up accident to put powder device, makes coal dust emptying rapidly in the state of accident, and coal dust is less than 1 hour in the storage time of buffer bin 10, has greatly strengthened row's powder speed, has guaranteed security of system.
Adopt the system of the present embodiment, material level in high charge level control monitor unit monitors buffer bin 10 higher than the high charge level allowing after, just by sending the control system of signal to system, control system is just controlled this accident and is put powder device and put powder, material level is controlled between this high charge level value and low material level value, to guarantee safety.Certainly powder material level control monitor unit also can by as the alert notification operating personal such as sound, to operate this accident after receiving at this operating personal, put powder device and put powder.
Preferably, buffer bin 10 is also communicated with the inert gas shielding mechanism (not shown) for be 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 preferably arranges near the material outlet of material blanking tube 2 and the material feeding of second conveyor 9 surface.The dedusting delivery system of loose unpacked material also comprises the drifting dust processing equipment that is arranged on material blanking tube 2 places, so that the powder in the loose unpacked material being transferred is separated in moulding mixture.Preferably, drifting dust processing equipment is pneumatic separation device or ventilation disturbance device, like this, in the material blanking tube position of first transfer point, by the coal dust setting up the modes such as selection by winnowing or ventilation disturbance and make to be mixed in product coal, all after blowing out, first transfer point or first and second transfer point be gathered into type, thereby no longer there is serious airborne dust at follow-up transfer point because of coal dust free, greatly improved efficiency of dust collection, provided cost savings.
The present invention also provides a kind of transmitting bulk material method, and it carries out mass transport for utilizing according to the dedusting delivery system of above-mentioned loose unpacked material, and the method comprises:
The-the first conveyer 1 sealing transfer point in by transmitting bulk material to second conveyor 9, utilize aspirating mechanism that dust suction is gone out to this transfer point simultaneously;
-dust being pumped in this aspirating mechanism is delivered in forming machine 7 to be shaped to moulding mixture;
-moulding mixture after moulding be delivered to next stage conveying unit through the conveying unit of this grade or be delivered to accumulator plant through independent moulding mixture feedway.
In order to explain better the present invention, will further introduce the present invention as an example of brown coal drying industry example below.
For this reason, the invention provides a kind of dedusting delivery system that can be used for the loose unpacked material that solves coal dust airborne dust, comprise following structure and step:
(1) from reactor drying product coal after treatment, through enclosed the first conveyer 1, send into each transfer point;
(2) each transfer point is independently set up a set of coal powder collection-formation system, 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 that product coal is kicked up in transport process, under the effect of induced draft fan 5, produces negative pressure near dust shield 3, and the coal dust of kicking up is inhaled into dust sucting pipeline and enters sack cleaner (or also can be called as coal collector);
(4) by coal collector, collected the coal dust that gets off and delivered to through having the material discharging machine 6 of lock airway dysfunction the buffering hopper 10 at forming machine 7 tops, buffering hopper 10 bottoms adopt metering devices that coal dust is evenly sent into forming machine 7;
(5) coal dust that enters forming machine 7 forms the moulded coal 8 with definite shape and cold strength through punching press, moulded coal 8 is delivered to product coal yard by discharge device.
The first conveyer 1 and second conveyor 9 in the present embodiment 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 and windproof taking shelter from rain in course of conveying, also make whole dedusting delivery system there is leakproofness simultaneously, strengthen the dust removal ability of dust shield 3, and make that this dedusting delivery system is inner produces certain negative pressure, prevent the coal dust excessive contaminated environment of kicking up.
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, the preferred straight tube pipe that adopts curve coal spout or there is constant slope, angle between material blanking tube 2 line of centerss and the material feeding surface of second conveyor 9 is not less than 45 ° and be 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, make the reach of airborne dust point, strengthen the pick-up performance of dust shield 3.
Preferably, dust shield 3 positions are 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 are 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 the spontaneous combustion of coal dust deposition, preferably, the angle between this dust sucting pipeline and the junction of sack cleaner is not less than 30 °, to increase delivery rate.In pipe, gas flow rate is preferably controlled 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, to prevent coal dust accumulation spontaneous combustion.
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 strengths are not less than 500N.If certainly adopt other pattern equipment such as pair roller type forming machine also can, just need to set up not screening, the circulation secondary forming machine of moulding coal dust.
At coal dust, in forming machine 7, be shaped to after moulded coal 8, just this moulded coal 8 is carried in following two kinds of modes: a kind of is that moulded coal 8 after moulding is directly delivered on readymade coal feedway, delivers to coal yard together with after mixing with readymade coal; Another kind is that the moulded coal 8 after each transfer point moulding is delivered to coal yard by moulded coal feedway separately, as another kind of product coal.
The present invention is compared with traditional transfer point dust pelletizing system, at each transfer point, adopt collection-moulding integrated distributing depression dust-removing technology, can make coal dust direct punch forming after collecting of kicking up make moulded coal, the fundamentally disposable fine coal state that solved, thereby repeated collection, repeated contamination in transport process have been avoided, compressing moulded coal will be not in secondary transhipment or in having bad luck can be again because airborne dust and contaminated environment, 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 need to be delivered to catcher through long-distance conventionally, be difficult to avoid delivery duct not occur horizontal segment, once occur that accumulated powder just easily occurs horizontal segment, then there is the accidents such as pipeline detonation, simultaneously each transfer point distance is inconsistent, is also difficult to guarantee the dust removing effects of each dust sucting point.Coal dust fed distance of the present invention is short, at each transfer point, fast fine coal is become to moulded coal, and then concentrates and carry, and has eliminated coal dust and has carried because of long distance the hidden danger of bringing, and also can better control and guarantee the dust removing effects of each dust sucting point.In addition, will after coal powder collection, be pressed into moulded coal, the market channel of also further having widened product, simultaneously also from source eliminate or alleviated on-carriage and the product user airborne dust situation while using transhipment.
In a specific embodiment, as shown in Figure 1, dried brown coal are delivered to 1# transfer point through closed the first conveyer 1, through material blanking tube 2, drop on enclosed second conveyor 9.In this transport process, owing to falling and managing under interior induced air effect, when dry rear brown coal fall at second conveyor 9, material blanking tube 2 exits can produce airborne dust, and the negative pressure that these coal dusts of kicking 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, collects thus the coal dust containing in fluid, and convection cell carries out purifying treatment.Described low-pressure gas blowback system (not shown), adopts low-pressure air or nitrogen as purge gas, the coal dust of collecting to be blown off to sack cleaner bottom hopper.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 is to produce negative pressure in dust shield 3, sack cleaner, guarantees that the coal dust of kicking up all sucks in sack cleaner.
The coal dust dropping down onto in sack cleaner bottom hopper enters forming machine 7 top buffer bins 10 through material discharging machine 6, and forming machine 7 is pressed into these coal dusts the moulded coal 8 with definite shape and intensity.
Described material discharging machine 6 is the equipment such as the conventional star-shaped discharge valve with lock airway dysfunction, flap valve.
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 being pressed into directly drops on and on second conveyor 9, 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 as another kind of product, to deposit each transfer point separately, finally the moulded coal 8 of all transfer points is unified to collect to be stored together again; Or also can store separately by being delivered to coal yard in band conveyor Unified Set.
Example 1
1, dried brown coal are delivered to 1# transfer point through enclosed the first conveyer 1, through material blanking tube 2, drop on enclosed second conveyor 9.
2, the negative-pressure gas that the coal dust that kick up in material blanking tube 2 exits produces with induced draft fan 5 enters in pulse bag type dust collector from dust shield 3.
3, the coal dust of collecting drops down onto in sack cleaner bottom hopper, and purified gas is discharged from induced draft fan 5.
4, the coal dust dropping down onto in sack cleaner bottom hopper enters forming machine 7 top buffer bins 10 through material discharging machine 6, and forming machine 7 is pressed into these coal dusts the moulded coal 8 with definite shape and intensity.
5, the moulded coal 8 being pressed into directly drops on and on second conveyor 9, delivers to next transfer point or coal yard.
Example 2
1, dried brown coal are delivered to 1# transfer point through closed the first conveyer 1, through material blanking tube 2, drop on enclosed second conveyor 9.
2, the negative-pressure gas that the coal dust that kick up in material blanking tube 2 exits produces with induced draft fan 5 enters in pulse bag type dust collector from dust shield 3.
3, the coal dust of collecting drops down onto in sack cleaner bottom hopper, and purified gas is discharged from induced draft fan 5.
4, the coal dust dropping down onto in sack cleaner bottom hopper enters forming machine 7 top buffer bins 10 through material discharging machine 6, and forming machine 7 is pressed into these coal dusts the moulded coal 8 with definite shape and intensity.
5, the moulded coal 8 that moulded coal 8,2# transfer point and other transfer points being pressed at 1# transfer point is pressed into is delivered to coal yard through band conveyor unification separately.
In sum, dedusting delivery system and the carrying method 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 7, like this, when loose unpacked material in transfer point when the first conveyer 1 is delivered to second conveyor 9, the dust that this loose unpacked material is kicked up pumps out transfer point through Chou Chen mechanism, and then enter and in forming machine 7, carry out forming processes molding mass, like this, the moulding mixture of this moulding is owing to being the very little airborne dust that even do not occur of block dust emission, the present invention greatly reduces the dust raising phenomenon in transmitting bulk material process.
Describe embodiments of the invention, concerning general technical staff of the technical field of the invention, will be easy to accomplish various changes, modification and improvement.For example, consider induced draft fan, sack cleaner and the forming machine that the size of dust emission can select difference to exert oneself.Also can implement the present invention at some transfer points, or implement the present invention at front several transfer points, when the coal dust in readymade coal is after the collection moulding of several transfer points, dust emission is very little just can no longer collect moulding.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:
The first conveyer (1), has the first feed end and the first discharge end;
Second conveyor (9), is communicated with described the first conveyer (1), and has for reception from the second feed end of the material of described the first conveyer (1) with for described material being exported to the second discharge end of this grade of conveying unit;
The transfer point of sealing, the second feed end of the first discharge end of described the first conveyer (1) and described second conveyor (9) stretches into respectively in described transfer point, and described the first discharge end is passed to material the second feed end of described second conveyor (9) in described transfer point;
Chou Chen mechanism, with described transfer point internal communication for the material dust of kicking up is pumped out to described transfer point; And
Forming machine (7), to receive and the dust of Chou Chen mechanism suction is shaped to moulding mixture, described forming machine (7) is communicated with further to carry the moulding mixture of this moulding outside described transfer point with described second conveyor (9) or independent moulding mixture feedway with the described dirt mechanism connection of taking out.
2. system according to claim 1, is characterized in that, every grade of described conveying unit also comprises the buffer bin (10) being communicated with between described Chou Chen mechanism and described forming machine (7).
3. system according to claim 2, is characterized in that, described second conveyor (9) has the material feeding surface of accepting material, and described Chou Chen mechanism comprises:
Near described material feeding surface, be arranged on the dust shield (3) in described transfer point;
Be arranged on the dust exhaustor (4) that described transfer point is outer and be communicated with described dust shield (3), with by suck dust separated from the gas, described dust exhaustor (4) has air extractor duct and discharging opening, and the dust that the discharging opening of described dust exhaustor (4) is communicated with to be isolated out with described buffer bin (10) is delivered to described buffer bin (10); And
The induced draft fan (5) being 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 that prevents material generation detonation, and this explosion protection has the fairlead being 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 the accident with row's powder function and put powder device, described buffer bin is provided with powder material level control monitor unit in (10), to put powder device with described accident, coordinate, with controlling level higher than set high charge level time by this accident, put powder device and put powder so that material level is controlled in setting range.
7. system according to claim 1, it is characterized in that, the dedusting delivery system of described loose unpacked material also comprises material blanking tube (2), it is communicated with between described the first discharge end and the second feed end, material is delivered to described second conveyor (9) by described material blanking tube (2) from described the first conveyer (1), the dedusting delivery system of described loose unpacked material also comprises and is arranged on the drifting dust processing equipment that described material blanking tube (2) is located, so that the powder in the loose unpacked material being transferred is separated in moulding mixture.
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, first conveyer (1) of one-level conveying unit after second conveyor (9) formation of previous stage conveying unit continues, the second conveyor (9) of described rear one-level conveying unit forms again its first conveyer (1) of rear one-level conveying unit again that continues.
9. according to the system described in any one in claim 1 to 8, it is characterized in that, described material is brown coal.
10. a transmitting bulk material method, is characterized in that, for utilizing according to the dedusting delivery system of the loose unpacked material described in claim 1 to 9 any one, carries out mass transport, and the method comprises:
The-the first conveyer (1) sealing transfer point in by transmitting bulk material to second conveyor (9), utilize aspirating mechanism that dust suction is gone out to this transfer point simultaneously;
-dust being pumped in this aspirating mechanism is delivered in forming machine (7) to be shaped to moulding mixture;
-moulding mixture after moulding be delivered to next stage conveying unit through the conveying unit of this grade or be delivered to accumulator plant through independent moulding mixture feedway.
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| CN201410026433.4A CN103754597B (en) | 2014-01-21 | 2014-01-21 | The dedusting delivery system of loose unpacked material and carrying method |
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| CN201410026433.4A CN103754597B (en) | 2014-01-21 | 2014-01-21 | The dedusting delivery system of loose unpacked material and carrying method |
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| CN108382874A (en) * | 2018-05-07 | 2018-08-10 | 广州市致顺科技有限公司 | A kind of tandem drawing-in device |
| 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 |
| CN111285042A (en) * | 2019-08-23 | 2020-06-16 | 焦作科瑞森重装股份有限公司 | Ultra-remote conveying method and system for aluminum oxide |
| 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 |
| CN114871243A (en) * | 2022-07-11 | 2022-08-09 | 唐山神州机械集团有限公司 | Container formula material recovery processing system |
| CN115193529A (en) * | 2022-07-15 | 2022-10-18 | 国家电投集团东北电力有限公司抚顺热电分公司 | Material conveying equipment for coal crushing and working method thereof |
| CN115193200A (en) * | 2022-07-11 | 2022-10-18 | 唐山神州机械集团有限公司 | Portable intelligent powdery material recovery processing station |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108382874A (en) * | 2018-05-07 | 2018-08-10 | 广州市致顺科技有限公司 | A kind of tandem drawing-in device |
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| CN103754597B (en) | 2015-12-02 |
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