CN203972105U - A kind of multistage combined dry coal preparation system - Google Patents

Abstract

The utility model provides a kind of multistage combined dry coal preparation system, by at the vertical separator of existing combined type dry coal separation system combined type dry method, it connects with the horizontal separator of combined type dry method by being connected to the vertical sorting bed charging elevator of the middle coal discharging opening below of the horizontal separator of combined type dry method, to realize the vertical sorting to the middle coal from the horizontal separator of combined type dry method; The horizontal separator of combined type dry coal separation separator vertical with combined type dry coal separation combined, realized multipass sort, improved coal separation precision and ratio defective product, improved coal separation output simultaneously; By offer horizontal duct on moisture sorting bed, eliminated lower limit of separation.Pass through heat distribution pipeline, the high-temperature flue gas that combustion furnace is produced is delivered to each screening installation of whole assorting room, formation is dried the online oven dry of sorting material and system-wide circulation, has guaranteed round-the-clock dry method sorting production, has improved the efficiency of separation and output.

Description

A kind of multistage combined dry coal preparation system

Technical field

The utility model belongs to mechanical coal preparation technology field, is specifically related to a kind of multistage combined dry coal preparation system.

Background technology

Coal is as China's main energy sources, and the contradiction between its burning utilization and environmental pollution, is more and more paid close attention to by governments at all levels and the numerous common people.Carry out clean coal technology, By Reasonable Utilizing Its Coal Resources, improves coal quantity, reduces disposal of pollutants, has become the matter of utmost importance of each coal industry enterprise's existence and development.In order to improve coal quantity and adequately and reasonably to utilize, people have developed screening installation (system) and the method for various raw coal.

Coal washing is one of application of clean coal technology, and this technology is, by sorting, raw coal is separated into cleaned coal and spoil, improves coal purity, and desulfurization and deashing reduces disposal of pollutants, increases attached value.

At present, mainly wet split and dry separation, and wet split is because its demand for water resource is larger with waste, in addition wet method dense medium sorting process reclaims the undesirable not environmental protection causing, the easy argillization of part coal, invest high, operating cost is high, the shortcoming that construction period is long, by dry coal preparation equipment (system) and method based on vibrations and selection by winnowing, replaced gradually,---claim again combined type dry coal separation, because it is without water, there is not the use of dense medium and the reduction of production cost of contaminated environment, High Effective Dry Coal Beneficiation becomes the main development direction of current raw coal separation gradually, be put into the strategic new industry guidance list of state key.

But current dry coal preparation technology is generally only selected simple horizontal separator, and (the horizontal separator of combined type dry method) carries out sorting, there is the defect that sharpness of separation is low, yield poorly and coal is had relatively high expectations, and, in the product of sorting place, exist the middle coal between cleaned coal and spoil (to account for 35% of whole discharge rate, and can not be as production marketing under most of situations), greatly reduce ratio defective product, improved the cost that repeats sorting, restricted the development of dry separation technology.

In addition, current dry coal preparation for raw coal mostly need to build larger, more former Coal Stack Yard, raw coal is carried out to airing, affect operating efficiency, and itself moisture of the raw coal of this airing is still relatively high, is unfavorable for dry separation.

Utility model content

The purpose of this utility model one is to overcome that the sharpness of separation that existing dry coal preparation technology exists is low, (can not large-scale production) and the low defect of ratio defective product yield poorly.

Object two is to overcome because treating that sorting material is that in raw coal, moisture is higher, need to carry out airing and cause the low problem even losing efficacy of whole dry separation technical efficiency it.

Object three is the defects that overcome the lower limit of separation for fine dust of existing dry separation technology existence.

Object four is to provide a kind of method for separating based on above-mentioned multistage combined dry separation system.

For realizing object one, the utility model provides a kind of multistage combined dry coal preparation system, comprises frame, the hanging horizontal separator 2 of combined type dry method, the charging coal bunker 1 to horizontal separator 2 chargings of this combined type dry method, vortex dust removing air blast circulator 4, bag-type dust formula lingering remnants of past customs eductor 5, cleaned coal conveyer 6, thin waste slag transhipment screw rod 7, waste conveyor 8, sorting main air blower 10, the dust collecting system air-introduced machine 11 in frame; The horizontal separator 2 of combined type dry method by sorting bed, be arranged on sorting bed side with so that the vibrator of sorting bed vibration, be arranged on sorting bed bed surface below so that the wind hole that air-flow evenly arranges on bed surface acts on a plurality of air compartments of sorting material, sorting bed, vibrator are all arranged in frame by erecting by overhang; The air outlet of sorting main air blower 10 is communicated with the air compartment of the horizontal separator 2 of combined type dry method; The air intake vent of vortex dust removing air blast circulator 4 is communicated with the seal closure of the horizontal separator 2 of combined type dry method, and the air outlet of vortex dust removing air blast circulator 4 is communicated with the air intake vent of sorting main air blower 10; The air inlet of bag-type dust formula lingering remnants of past customs eductor 5 is communicated with the seal closure of the horizontal separator 2 of combined type dry method, and its air outlet is communicated with the air intake vent of dust collecting system air-introduced machine 11, and the air outlet of dust collecting system air-introduced machine 11 is communicated with chimney; Cleaned coal conveyer 6 and waste conveyor 8 are connected to respectively the below of cleaned coal discharging opening and the spoil discharging opening of the horizontal separator 2 of combined type dry method; Thin waste slag transhipment screw rod 7 is connected between cleaned coal conveyer 6 and waste conveyor 8, realizing thin waste slag is transported on waste conveyor 8, special character is, also comprise the vertical separator 3 of combined type dry method, it connects with the horizontal separator 2 of combined type dry method by being connected to the vertical sorting bed charging elevator 9 of the middle coal discharging opening below of the horizontal separator 2 of combined type dry method, to realize the vertical sorting to the middle coal from the horizontal separator 2 of combined type dry method;

The cleaned coal discharging opening of the vertical separator 3 of combined type dry method, spoil discharging opening are connected to respectively the top of cleaned coal conveyer 6, waste conveyor 8;

The vertical separator 3 of combined type dry method comprises newel 12 and the steel cylinder outer cover 13 of concentric setting, is from up to down provided with multilayer steps formula swivel chute 14 on newel 12 outer walls, and these step swivel chute 14 outsides are fixed on the inwall of steel cylinder outer cover 13; Electromagnetic vibrator 15 is installed after the top seal of newel 12;

In the discharging opening place of the bottom of bottom step swivel chute 16, be provided with and be placed in the cleaned coal chute 17 of inner side and the slate chute 18 in outside, between cleaned coal chute 17 and slate chute 18, be provided with to separate the dividing plate 19 of heavy particle and light grains, this dividing plate 19 can along the outer side shield place face of cleaned coal chute 17 obliquely or downwards, sliding near or sliding far away to steel cylinder outer cover 13 inwalls, size with change with the aperture of slate chute 18 entrances, and then realize the adjusting to spoil load.

Above-mentioned step swivel chute 14 comprises the downward chute groove face of rotation and is connected and rotates the substrate to downward-extension with newel 12 is vertical, and the chute groove face cross section of every layer of step swivel chute 14 and the accordingly angle between substrate successively reduce from top to bottom;

Newel 12 bottoms are provided with air intake interface 21, on newel 12 between the chute groove face of layer step swivel chute 14 of each more than the bottom and corresponding substrate, be provided with discharge pipe 22, it extends to steel cylinder outer cover 13 from newel 12, and this discharge pipe 22 is provided with a plurality of exhaust vents that are axially evenly arranged along discharge pipe 22 or wind groove 23, and this exhaust vent or wind groove 23 arrange outward towards chute groove face cross section, with the sorting material to after unsettled to up-draught.

The rotating guide 24 that is inwardly provided with, extends obliquely on inwall corresponding to the steel cylinder outer cover 13 at the outer rim place of every layer of step swivel chute 14;

This rotating guide 24 is fixedly connected with steel cylinder outer cover 13 by arcwall face, and its length along arcuate directions equals the length of described step swivel chute 14.

The outer wall of steel cylinder outer cover 13 is respectively provided with the installation hook that four edges are circumferentially evenly arranged up and down, by wirerope, hook, hang on the rectangular frame being formed by 4 steel column Combination Welding, on this rectangular frame, corresponding to each hook place, be provided with a spring base platform, rectangular frame connects with hook by this spring base platform.

Steel cylinder outer cover 13 tops are provided with the sorting material feed hopper that dust cover that soft filtering makes and lower end penetrate blanking in this dust cover.

For realizing object three, increase the separation of fine dust and thrust forward, to guarantee the sorting bed that passes through of material average rate, can in sorting bed, not be detained, overcome elimination lower limit of separation simultaneously, below the bed surface of sorting bed, be provided with horizontal duct 20, its sorting material entrance one end opening from sorting bed also longitudinally extends to sorting bed end, and connect with a plurality of air compartments; The air outlet of sorting main air blower 10 is communicated with this horizontal duct 20, to provide distinguished and admirable;

The sorting material porch of sorting bed is provided with the vibrations feeder that is placed in charging coal bunker 1 outlet below, this vibrations feeder is the base plate 43 to the backboard extension of sorting bed by end, be placed in these base plate 43 both sides of the edge, front and back and extend upward and front and rear baffle 44,45 that end extends to the backboard of sorting bed, the panel 46 that is placed in these base plate 43 front edges and extends upward and be connected with front and rear baffle 44,45, the feeding vibrator 47 that is arranged on these panel 46 lateral surfaces forms.

And in order to realize object two, in said system, make the air intake vent of sorting main air blower 10 be communicated with the exhanst gas outlet 25 of powder fluidized bed compound burner, to obtain high-temperature flue gas;

Powder fluidized bed compound burner comprises body of heater 26, be arranged on the spiral casing type coal fines burner installing hole 27 of body of heater 26 rear ends, be arranged on the burner hearth 28 in body of heater 26, be arranged on the preheated air passage 29 outside body of heater 26, be arranged on the exhanst gas outlet 25 that body of heater 26 tops communicate with burner hearth 28, be arranged on the ash discharging hole 30 that bottom of furnace body front end communicates with burner hearth 28, preheated air passage 29 extends downward body of heater front bottom end after body of heater 26 top rear extend to forward body of heater top front end, body of heater 26 front end ends are provided with the preheating gas outlet 31 communicating with preheated air passage 29, burner hearth the latter half arranges combustion fluidized bed 32 from ash discharging hole 30 between burner hearth 28 rear ends, the burner hearth first half and front end are refractory cement and water building body, body of heater 26 bottoms are provided with the vulcanized drum air port 33 communicating with combustion fluidized bed 32, on combustion fluidized bed 32 madial walls, be provided with the air outlet that a plurality of opening upwards communicate with burner hearth 29, and this air outlet communicates with vulcanized drum air port 33 by the air channel in burner hearth,

Also comprise blast pipe and preheating gas outlet 31 combustion blowers that are communicated with, its discharge pipe is communicated with fluidisation blast orifice 33 by blowing line.

Above-mentioned spiral casing type coal fines burner, comprises that air intake connects pipeline section 34, is connected the wind coal dust air-out pipeline section 35 that is spiral inside coiling that pipeline section 34 connects with this air intake, and the air outlet 36 of this air-out pipeline section 35 is connected pipeline section 34 with air intake vertical.

Also be included as the conveying-type online dry mechanism of the raw coal material after charging coal bunker 1 auxiliary breaking, this conveying-type online dry mechanism is combined by a plurality of conveying-type online dry device multi-stage serial connections; This conveying-type online dry device comprises mass transport storehouse 37, be placed in oar blade type conveying axis 38 in mass transport storehouse 37, be arranged on 37 tops, one end, mass transport storehouse material inlet 39, be arranged on 37 other end bottoms, mass transport storehouse material outlet 40, be arranged on 37 tops, mass transport storehouse can folding storehouse lid 41 and be arranged on the hot gas entrance 42 on material inlet 39; This hot gas entrance 42 is connected to obtain preheated air by pipeline with the discharge pipe of combustion blower.

The chute groove face of every layer of step swivel chute 14 and the angle between horizontal plane are large or equal 10 ° and little or equal 50 °.

The utility model has the advantages that:

1, the horizontal separator of combined type dry coal separation separator vertical with combined type dry coal separation combined, realized multipass sort, improved coal separation precision and ratio defective product, improved coal separation output simultaneously;

2, by offer horizontal duct on moisture sorting bed, increase is to sorting material (treating coal separation), horizontal wind-force, make sorting material rotate forward rolling, especially form crossing the separation of fine powder and thrust forward, to guarantee the sorting bed that passes through of material average rate, can in sorting bed, not be detained, eliminated lower limit of separation simultaneously.

3, pass through heat distribution pipeline, the high-temperature flue gas that combustion furnace is produced is delivered to each screening installation of whole assorting room, formation is dried the online oven dry of sorting material and system-wide circulation, greatly reduce the moisture of sorting material, the separation process of aggravation sorting material, effectively solve the moisture issues of ore removal raw coal, can eliminate rainy weather, impact that cold season, area produced coal separation simultaneously, guarantee the effect that round-the-clock efficient dry separation is produced, improved the efficiency of separation and output.

4, by the pan feeding port at horizontal sorting bed, increase vibrations feeder, close backboard one side by sorting material guide water level bed, has increased the lateral separation of sorting material on horizontal sorting bed, extends the sorting time, is beneficial to the raising of sharpness of separation.

Below in conjunction with accompanying drawing, the utility model is described in more detail.

Accompanying drawing explanation

Fig. 1 is that multistage combined dry coal preparation system forms floor map.

Fig. 2 is feeding vibrator structure schematic diagram.

Fig. 3 is sorting bed (claiming the again horizontal sorting bed) structural representation of the horizontal separator of combined type dry method after improving.

Fig. 4 dries thermal source to supply with schematic diagram online.

Fig. 5 is powder fluidized bed compound burner structural representation.

Fig. 6 a is spiral casing type coal fines burner structure schematic diagram.

The side schematic view of Fig. 6 b Fig. 6.

Fig. 7 is mass transport chamber structure schematic diagram.

Fig. 8 is the vertical separator structure schematic diagram of combined type dry method.

Fig. 9 is the electromagnetic vibrator deployment mechanism schematic diagram of the vertical separator of combined type dry method.

Figure 10 is that in the vertical separator of combined type dry method, step swivel chute arranges schematic diagram.

Figure 11 is that the discharge pipe of the vertical separator of combined type dry method arranges schematic diagram.

Figure 12 arranges the schematic diagram of airduct between continuous three layers of step swivel chute.

Figure 13 is that steel cylinder outer cover hangs schematic diagram.

The specific embodiment

In order to overcome, the sharpness of separation that existing dry coal preparation technology exists is low, (can not large-scale production) and the low defect of ratio defective product yield poorly, the present embodiment provides the multistage combined dry coal preparation system shown in a kind of Fig. 1, comprises frame, the hanging horizontal separator 2 of combined type dry method, the charging coal bunker 1 to horizontal separator 2 chargings of this combined type dry method, vortex dust removing air blast circulator 4, bag-type dust formula lingering remnants of past customs eductor 5, cleaned coal conveyer 6, thin waste slag transhipment screw rod 7, waste conveyor 8, sorting main air blower 10, the dust collecting system air-introduced machine 11 in frame; By vertical sorting bed charging elevator 9, be connected to the vertical separator 3 of combined type dry method of the middle coal discharging opening below of the horizontal separator 2 of combined type dry method, woollen stockyard (scaffolding), raw coal crushing drying pipeline, material to be selected stockyard etc.

Figure is not difficult to find out thus, the coal separation process of this system is: first by Hubei Province, break machine the raw coal (woollen) in woollen stockyard (scaffolding) is carried out to fragmentation, granularity is little or equal the coal cinder of 30mm, high-temperature flue gas combustion furnace (hot-blast stove) being produced by heat distribution pipeline is delivered to conveying-type online dry mechanism (drying online pipeline), realize in the process of carrying the oven dry of the coal cinder after fragmentation (water content of the coal cinder after crushing drying is not more than 9%), afterwards (also can be according to circumstances by raw material transport channel, by belt conveyor, carry) be delivered near the place, sorting material stockyard sorting main system, through raw material cabin, by belt conveyor, be delivered to charging coal bunker 1, sorting material is arranged on the material inlet place of the sorting bed of the horizontal separator 2 of combined type dry method through being arranged on the vibrations feeder 50(shown in Fig. 2 of charging coal bunker 1 below, this vibrations feeder is the base plate 43 to the backboard extension of sorting bed by end, be placed in these base plate 43 both sides of the edge, front and back and extend upward, and end is to the front and rear baffle 44 of the backboard extension of sorting bed, 45, be placed in these base plate 43 front edges and extend upward and with front and rear baffle 44, 45 panels 46 that connect, be arranged on the feeding vibrator 47 of these panel 46 lateral surfaces, be arranged on front and rear baffle 44, 45 and panel 46 on the hook 48 that is flexible coupling form.), the base plate 43 that sorting material limit vibrations (producing vibrations by feeding vibrator 47) limit is extended to the backboard side of sorting bed by shaking the end of feeder, the backboard side that is delivered to sorting bed (is about to sorting material guiding backboard, so that sorting material is carried to the inner side of sorting bed.), thereby increase the lateral separation of sorting material on sorting bed (a bed shape for sorting bed be generally from feeding mouth end vertically terminad narrow down gradually, during installation, also be to reduce gradually highly to tilt to install from feeding mouth terminad, form flat slope face, be beneficial to sorting material and move axially along sorting bed.), and then increased the lateral separation of material at assorting room, be conducive to improve material sharpness of separation.

When shaking sorting on sorting bed, through vortex dust removing air blast circulator 4 and sorting main air blower 10, to a plurality of air compartments of sorting bed and the horizontal duct 20(of the sorting bed shown in Fig. 3, be mainly for realizing the purpose of this utility model three, increase the separation of fine dust and thrust forward, to guarantee the sorting bed that passes through of material average rate, can in sorting bed, not be detained, overcome elimination lower limit of separation simultaneously, below the bed surface of sorting bed, be provided with horizontal duct 20, its sorting material entrance one end opening from sorting bed also longitudinally extends to sorting bed end, and connect with a plurality of air compartments, the air outlet of sorting main air blower 10 is communicated with this horizontal duct 20, to provide high temperature distinguished and admirable from the high-temperature flue gas of hot-blast stove.) interior logical hot blast, so that sorting material advances along the longitudinal mode spiral as shown by the arrows in Figure 3 of sorting bed, guaranteed the separation of fine dust and thrust forward simultaneously, make sorting material can in sorting bed, not be detained and realize further online oven dry the to sorting material, further increase the segregation degree of sorting material.

In the multistage combined dry coal preparation system shown in Fig. 1, after 5 pairs of dust udst separations of bag-type dust formula lingering remnants of past customs eductor that the seal closure of sorting bed is communicated with, through dust collecting system air-introduced machine 11, from chimney, enter atmosphere, the air outlet of sorting main air blower 10 is communicated with the air compartment of the horizontal separator 2 of combined type dry method; The air intake vent of vortex dust removing air blast circulator 4 is communicated with the seal closure of the horizontal separator 2 of combined type dry method, and the air outlet of vortex dust removing air blast circulator 4 is communicated with the air intake vent of sorting main air blower 10; The air inlet of bag-type dust formula lingering remnants of past customs eductor 5 is communicated with the seal closure of the horizontal separator 2 of combined type dry method, and its air outlet is communicated with the air intake vent of dust collecting system air-introduced machine 11, and the air outlet of dust collecting system air-introduced machine 11 is communicated with chimney.

Finally, cleaned coal after sorting and spoil fall into cleaned coal conveyer 6 and waste conveyor 8 through cleaned coal discharging opening and the spoil discharging opening of sorting bed respectively, deliver to cleaned coal stockyard and spoil stockyard, middle coal is promoted to the further sorting of the vertical separator 3 of combined type dry method through vertical sorting bed charging elevator 9, obtain cleaned coal and spoil, through cleaned coal conveyer 6 and waste conveyor 8, be delivered to cleaned coal stockyard and spoil stockyard respectively.

And high-temperature flue gas is communicated with the exhanst gas outlet 25 of the powder fluidized bed compound burner shown in Fig. 4 at the air intake vent by sorting main air blower 10, to obtain high-temperature flue gas, and set up rotoclone collector 51 between the air intake vent of sorting main air blower 10 and exhanst gas outlet 25, to reduce the dust in flue gas, be beneficial to environmental protection.

The structure of powder fluidized bed compound burner as shown in Figure 5, comprise body of heater 26, be arranged on the spiral casing type coal fines burner installing hole 27 of body of heater 26 front ends, be arranged on the burner hearth 28 in body of heater 26, be arranged on and body of heater 26 surrounded to wherein (bottom of body of heater 26 is owing to being fixedly connected with mounting base outside body of heater 26, therefore, bottom of furnace body is not besieged) preheated air passage 29, be arranged on the exhanst gas outlet 25 that body of heater 26 tops communicate with burner hearth 28, be arranged on the ash discharging hole 30 that bottom of furnace body rear end communicates with burner hearth 28, preheated air passage 29 extends downward bottom, body of heater rear end after body of heater 26 top front ends extend to forward body of heater top rear, body of heater 26 ends, rear end are provided with the preheating gas outlet 31 communicating with preheated air passage 29, burner hearth the latter half arranges combustion fluidized bed 32 from ash discharging hole 30 between burner hearth 28 front ends, the burner hearth first half and front and back end are refractory cement and water building body, body of heater 26 bottoms are provided with the fluidisation blast orifice 33 communicating with combustion fluidized bed 32, on combustion fluidized bed 32 madial walls, be provided with the air outlet that a plurality of opening upwards communicate with burner hearth 29, and this air outlet communicates with fluidisation blast orifice 33 by the air channel in burner hearth, also comprise that blast pipe and preheating gas export the 31 combustion blower 49(that are communicated with and see Fig. 4), its discharge pipe is communicated with fluidisation blast orifice 33 by blowing line.Ash discharging hole 30 places are also provided with ash discharge blast orifice 52, with this air blast, the dust at ash discharging hole 30 places are blown in ashpit.

Be not difficult to find out, this powder fluidized bed compound burner organically combines the spray combustion technology of coal dust, suspension fluidisation combustion technology science, has initiated powder fluidized bed compound combustion concept.This technology is that the miniaturization development of coal dust furnace is laid a good foundation.Traditional little coal fired boilers, because combustion space is little, fuel cannot sufficient combustion, causes undercapacity, simultaneously unburned fuel coking everywhere in burner hearth.Especially bottom coking, consequence is even more serious, usually, because of once bottom coking (cannot continue ash disposal, only import but no export), just causes stove to be scrapped or overhaul.Most experts have sentenced death penalty to the miniaturization of coal-powder boiler.This powder fluidized bed compound burner be burner hearth bottom is designed to one can automatic Air Adjusting and the fluid bed of ash disposal, the unburned coal dust that coal burner is sprayed into (the spiral casing type coal fines burner as the aforementioned) fluidized bed combustion that suspends, thereby both guaranteed that good fuel burn-off rate and stove exerted oneself, guaranteed that again burner hearth bottom can overheated and coking, can realize wind-force automatic ash-removing again simultaneously.One action number is the invention of a science in fact.

In conjunction with Fig. 6 a, visible, aforementioned spiral casing type coal fines burner, comprise for air intake coal dust and (by distinguished and admirable, coal dust being sent into, therefore distinguished and admirablely include a large amount of coal dusts, therefore be called wind coal dust) air intake connect pipeline section 34, be connected the air-out pipeline section 35 that is spiral inside coiling of pipeline section 34 connections with this air intake, the air outlet 36 of this air-out pipeline section 35 is connected pipeline section 34 with air intake vertical.

The necessary condition of coal dust efficient burning: 1. sufficiently long combustion path 2. enough good atomization 3. enough ignition concentration 4. sufficiently high fire box temperature 5. enough thin coal powder size 6. sufficiently high coal dust calorific value wherein combustion path, atomization and ignition concentration are closely-related with burner.The limited length of small boiler, is difficult to meet the requirement of combustion path length.

The spiral casing type coal fines burner that the present embodiment provides as shown in Figure 6 b, to send into burner hearth after forcing the mode (forming the stove whirlwind after the break-in shown in Fig. 6 b) of High Rotation Speed to be sent by spiral case passage (being air-out pipeline section 35) coal dust and wind, thereby in little space, met the requirement of combustion path length, greatly improved the burn-off rate of coal dust.Meanwhile, because of abundant mixing and the High Rotation Speed of wind and coal dust, realize good atomization, be conducive to burning.In addition, solid particle is than wind weight, and during rotation, majority concentrates on outer, and the concentration of coal dust has been improved in part, is conducive to ignition.The air-out pipeline section 35 of this spiral casing type coal fines burner is by door shape flange 53 and powder fluidized bed compound burner hinge-coupled, and, in order to increase the buoyancy of coal dust, make it in burner hearth, have longer combustion path and mix with air fully, and burning is more abundant, the present embodiment has been set up and secondary blast pipeline section 54 at the coiling center of air-out pipeline section 35, to increase the air quantity in burner hearth, and on this secondary air pipeline section 54, can set up valve, realize carrying the adjusting of air quantity and wind speed.

Conveying-type online dry mechanism (drying online pipeline) after aforesaid raw coal fragmentation is combined by a plurality of conveying-type online dry device multi-stage serial connections; This conveying-type online dry device comprises the mass transport storehouse 37 shown in Fig. 7, be placed in oar blade type conveying axis 38 in mass transport storehouse 37, be arranged on 37 tops, one end, mass transport storehouse material inlet 39, be arranged on 37 other end bottoms, mass transport storehouse material outlet 40, be arranged on 37 tops, mass transport storehouse can folding storehouse lid 41 and be arranged on the hot gas entrance 42 on material inlet 39; This hot gas entrance 42 is connected to obtain preheated air by pipeline with the discharge pipe of combustion blower 49.---known in conjunction with Fig. 4, the blast pipe of combustion blower 49 is communicated with the preheating gas outlet 31 of powder fluidized bed compound burner, by the heated air in the preheated air passage 29 through the preheating of powder fluidized bed compound burner, in hot gas entrance 42 is delivered to mass transport storehouse 37, when chaperonage blade formula conveying axis 38(is used, need to assemble motor and the power transmission shaft of corresponding power, to drive oar blade type conveying axis 38.) rolling convey materials time material is carried out to heating, drying, so, evaporation and the oven dry of the moisture of the material after fragmentation have been accelerated, also make the removing method diversity of the moisture of material, in material at weather better or after fragmentation moisture less in, can open storehouse lid 41, carry out natural drying, by the rolling of oar blade type conveying axis 38, accelerate the evaporation of moisture simultaneously.

So far, realized the purpose of this utility model two: overcome because treating that sorting material is that in raw coal, moisture is higher, need to carry out airing and cause the low problem even losing efficacy of whole dry separation technical efficiency it, realized online material drying, effectively solve the moisture issues of ore removal raw coal, eliminate the impact that rainy weather, cold season, area produced coal separation simultaneously, guaranteed the effect that round-the-clock efficient dry separation is produced.

Now to realizing the nucleus equipment of material combined type dry separation, carry out by reference to the accompanying drawings division:

The horizontal separator 2 of existing combined type dry method by sorting bed, be arranged on sorting bed rear end with so that the electromagnetic vibrator of sorting bed vibration, be arranged on sorting bed bed surface below so that the wind hole that air-flow evenly arranges on bed surface acts on a plurality of air compartments of sorting material, sorting bed, electromagnetic vibrator are all arranged in frame by erecting by overhang.And be sorting bed structural representation after improving shown in Fig. 3, figure is visible thus, vibrations feeder 50 is arranged on the feeding mouth place of sorting bed, sorting bed has been set up horizontal channel 20, thus, make this sorting bed there is vertically-supplying air and horizontal wind, wherein, vertically-supplying air mainly forms the suspension bed of material, prevent that the autogenous medium bed of material from falling into air channel, keep light materials (the high-quality raw coal that ash content is less) on the top of autogenous medium layer, heavy substance, in the bottom of autogenous medium layer, has overcome fine grain eduction simultaneously.Horizontal wind mainly formed the separation of fine dust and thrust forward, to guarantee the sorting bed that passes through of material average rate, can in sorting bed, not be detained, and eliminated lower limit of separation simultaneously.

As seen from Figure 1, cleaned coal conveyer 6 and waste conveyor 8 are connected to respectively the below of cleaned coal discharging opening and the spoil discharging opening of the horizontal separator 2 of combined type dry method; Thin waste slag transhipment screw rod 7 is connected between cleaned coal conveyer 6 and waste conveyor 8, realizes thin waste slag and is transported on waste conveyor 8; The vertical separator 3 of combined type dry method connecting with the horizontal separator 2 of combined type dry method by being connected to the vertical sorting bed charging elevator 9 of the middle coal discharging opening below of the horizontal separator 2 of combined type dry method, to realize the vertical sorting to the middle coal from the horizontal separator 2 of combined type dry method, improve sharpness of separation and scale.

The cleaned coal discharging opening of the vertical separator 3 of combined type dry method, spoil discharging opening are connected to respectively the top of cleaned coal conveyer 6, waste conveyor 8, by cleaned coal and spoil difference conveying-type cleaned coal field and barrow.

As shown in Figure 8, here the vertical separator 3 of combined type dry method relating to comprises newel 12 and the steel cylinder outer cover 13 of concentric setting, on newel 12 outer walls, be from up to down provided with multilayer steps formula swivel chute 14, these step swivel chute 14 outsides are fixed on the inwall of steel cylinder outer cover 13, electromagnetic vibrator 15(is installed and for precision and the uniformity of material sorting after the top seal of newel 12, on steel cylinder outer cover 13, corresponding to adjacent step swivel chute, Shang Xia 14, electromagnetic vibrator 56 is circumferentially evenly installed a plurality of times edge, place, centre position---in Figure 10, be along electromagnetic vibrators 56 are circumferentially evenly installed 4 times, with strength imparting material separating effect and uniformity, see Fig. 9), in the discharging opening place of the bottom of bottom step swivel chute 16, be provided with and be placed in the cleaned coal chute 17 of inner side and the slate chute 18 in outside, between cleaned coal chute 17 and slate chute 18, be provided with to separate the dividing plate 19 of heavy particle (being mainly spoil) and light grains (being mainly cleaned coal), this dividing plate 19 can be along the outer side shield 170 place faces of cleaned coal chute 17 obliquely or downwards, sliding near or sliding far away to steel cylinder outer cover 13 inwalls, size with change with slate chute 18 entrance apertures, and then the adjusting of realization to spoil load, when the upper end of dividing plate 19 approaches the inwall of steel cylinder outer cover 13 obliquely, gap between the inwall of itself and steel cylinder outer cover 13 reduces gradually, thereby reduce the aperture of slate chute 18 entrances, reduce to enter the amount of the spoil in slate chute 18, otherwise, under the upper end of dividing plate 19 is oblique during away from the inwall of steel cylinder outer cover 13, gap between the inwall of itself and steel cylinder outer cover 13 increases gradually, thereby increase the aperture of slate chute 18 entrances, increase the amount that enters the spoil in slate chute 18.

Wherein, the effect of step swivel chute 14 makes sorting material every through a step, and the bed of material is unsettled is just subject to centrifugal force redistribution once.Once forming the bed of material just cannot redistribute again.The innovative design of step swivel chute 14, has simulated the repeatedly situation of pan feeding, has realized repeatedly distributing again of light-heavy material, has reached the object of weight solid material sorting.

Above-mentioned step swivel chute 14 comprise around the downward chute groove face of newel 12 rotation be connected and rotate the substrate to downward-extension with newel 12 is vertical, angle between the chute groove face cross section of every layer of step swivel chute 14 and corresponding substrate successively reduces from top to bottom, suggestion from top to bottom, angle value between every layer of chute groove face and horizontal plane is between 50 ° to 10 °, as shown in figure 10, from top to bottom, chute groove face and the angle between horizontal plane of each layer of step swivel chute 14 are 30 ° successively, 20 °, 10 ° and 5 ° of decline trend settings, so form step sorting, the layering and minute band that contribute to material sorting, upper urgency (concentration criterion is more violent), lower slow, can guarantee that the precision of material sorting can guarantee the discharge of the material after sorting again, realize well minute band.

Angle of inclination that can certainly upper three layers is set to downward-sloping 45 °, and the bottom is set to 35 °, and it is 45 ° that the angle under being tilted to of substrate is set to three layers equally, and the bottom is 35 °.These technology essential factors require to carry out flexible design and making according to concrete site operation, needn't stick to the parameter designing that the present embodiment provides.

As shown in figure 11, newel 12 bottoms are provided with air intake interface 21, on newel 12 between the chute groove face of layer step swivel chute 14 of each more than the bottom and corresponding substrate, be provided with discharge pipe 22, it extends to steel cylinder outer cover 13 from newel 12, and on this discharge pipe 22, be provided with a plurality of exhaust vents that are axially evenly arranged along discharge pipe 22 or wind groove 23, and this exhaust vent or wind groove 23 arrange outward towards chute groove face cross section, with the sorting material to after unsettled to up-draught, to increase material air gap, improve material fluidity, improve material eduction.As shown in figure 12 for the schematic diagram of airduct 22 is set between continuous three layers of step swivel chute 14.

The rotating guide 24(that is inwardly provided with, extends obliquely on inwall corresponding to the steel cylinder outer cover 13 at the outer rim place of every layer of step swivel chute 14 also can be referred to as cross section rotary steering plate), this rotating guide 24 is fixedly connected with steel cylinder outer cover 13 by arcwall face, and its length along arcuate directions equals the length of step swivel chute 14.

Effect due to centrifugal force and chute groove face oblique angle, sorting material tendency is moved along the outer flow measurement of the sorting bed outside of the chute groove face of every layer of step swivel chute 14 (along), due to stopping of outer panel (referring to steel cylinder outer cover 13) and chute groove face, the centrifugal force that sorting material outside flowing to is subject to produces component upwards, again due to rotating guide 24(cross section rotary steering plate) stop, produce again component to the inside, the compound action of two component, make the sorting material that flows to outside form inside the making a concerted effort of cross section along sorting bed, then under the effect of gravity, make this part sorting material form final making progress from lower end, outside, the inside track that rotatablely moves, thus, the weight of sorting material is distributed in motion process ceaselessly to change, thereby greatly improved the separating effect of light-heavy material, improved sharpness of separation.

As shown in figure 13, the outer wall of steel cylinder outer cover 13 is upper and lower is respectively provided with the installation hook that four edges are circumferentially evenly arranged, by wirerope, hook hanging, by 4 steel column 55(, can adopt the seamless steel pipe of 50mm) on the rectangular frame that forms of Combination Welding, on this rectangular frame, corresponding to each hook place, being provided with a spring base platform 58(can adopt 6mm double-layer plate to make), rectangular frame connects with hook by this spring base platform 58, thereby steel cylinder outer cover 13 is hung, and then realize the vertical separator 3 of whole combined type dry method is hung.

And steel cylinder outer cover 13 tops are provided with the sorting material feed hopper that dust cover that soft filtering makes and lower end penetrate blanking in this dust cover, realize passive filter dirt, have good environmental-protection function.

When making, present newel 12 peripheral solder step swivel chutes 14, and between steel cylinder outer cover 13 and step swivel chute 14, reserve and keep in repair manhole, maintenance after convenient, and step swivel chute 14 outer rim arcwall faces are welded on the inwall of firm cylinder outer cover 13, material (middle coal mixtures) entrance pipeline section 57 is fixed on top layer step swivel chute 14 upper ends, and guarantees that material approach axis is consistent with material direction of rotation.

In sum, be not difficult to find out, a kind of multistage combined dry coal preparation system and method that above embodiment provides, has following beneficial effect:

1, the horizontal separator of combined type dry coal separation separator vertical with combined type dry coal separation combined, realized multipass sort, improved coal separation precision and ratio defective product, improved coal separation output simultaneously;

Traditional compound sorting unit by dry method, is all single stage type, and often the effect in production application differs greatly with the simulated experiment effect of dispatching from the factory, and causes many equipment application to be counted out.This be because, traditional method contains middle coal by-product, quantity of cleaned coal is not high.And raw coal is in recovery process, it is random that water content and content of ashes change, and the variation of ore bed, the variation of weather, the variation in season etc. all can have a significant impact its physical aspect.And multipass sort technique can alleviate the impact that various enchancement factors are produced sorting, its meaning is very great.

2, by offer horizontal duct on moisture sorting bed, increase is to sorting material (treating coal separation), horizontal wind-force, make sorting material rotate forward rolling, especially form crossing the separation of fine powder and thrust forward, to guarantee the sorting bed that passes through of material average rate, can in sorting bed, not be detained, overcome elimination lower limit of separation simultaneously.

3, pass through heat distribution pipeline, the high-temperature flue gas that combustion furnace is produced is delivered to each screening installation of whole assorting room, formation is dried the online oven dry of sorting material and system-wide circulation, greatly reduce the moisture of sorting material, the separation process of aggravation sorting material, effectively solve the moisture issues of ore removal raw coal, can eliminate rainy weather, impact that cold season, area produced coal separation simultaneously, guaranteed the effect that round-the-clock efficient dry separation is produced, the efficiency of separation of raising and output.

4, by the pan feeding port at horizontal sorting bed, increase vibrations feeder, close backboard one side by sorting material guide water level bed, has increased the lateral separation of sorting material on horizontal sorting bed, extends the sorting time, is beneficial to the raising of sharpness of separation.

Claims (10)

1. a multistage combined dry coal preparation system, comprises frame, the hanging horizontal separator of combined type dry method (2), the charging coal bunker (1) to the horizontal separator of this combined type dry method (2) charging, vortex dust removing air blast circulator (4), bag-type dust formula lingering remnants of past customs eductor (5), cleaned coal conveyer (6), thin waste slag transhipment screw rod (7), waste conveyor (8), sorting main air blower (10), the dust collecting system air-introduced machine (11) in frame; The horizontal separator of combined type dry method (2) by sorting bed, be arranged on sorting bed rear end with so that the vibrator of sorting bed vibration, be arranged on sorting bed bed surface below so that the wind hole that air-flow evenly arranges on bed surface acts on a plurality of air compartments of sorting material, sorting bed, vibrator are all arranged in frame by erecting by overhang;

The air outlet of sorting main air blower (10) is communicated with the air compartment of the horizontal separator of combined type dry method (2);

The air intake vent of vortex dust removing air blast circulator (4) is communicated with the seal closure of the horizontal separator of combined type dry method (2), and the air outlet of vortex dust removing air blast circulator (4) is communicated with the air intake vent of sorting main air blower (10);

The air inlet of bag-type dust formula lingering remnants of past customs eductor (5) is communicated with the seal closure of the horizontal separator of combined type dry method (2), and its air outlet is communicated with the air intake vent of dust collecting system air-introduced machine (11), and the air outlet of dust collecting system air-introduced machine (11) is communicated with chimney;

Cleaned coal conveyer (6) and waste conveyor (8) are connected to respectively the below of cleaned coal discharging opening and the spoil discharging opening of the horizontal separator of combined type dry method (2);

Thin waste slag transhipment screw rod (7) is connected between cleaned coal conveyer (6) and waste conveyor (8), realizes thin waste slag and is transported to waste conveyor (8) above, it is characterized in that:

Also comprise the vertical separator of combined type dry method (3), it connects with the horizontal separator of combined type dry method (2) by being connected to the vertical sorting bed charging elevator (9) of the middle coal discharging opening below of the horizontal separator of combined type dry method (2), to realize the vertical sorting to the middle coal from the horizontal separator of combined type dry method (2);

The cleaned coal discharging opening of the vertical separator of combined type dry method (3), spoil discharging opening are connected to respectively the top of cleaned coal conveyer (6), waste conveyor (8);

The vertical separator of described combined type dry method (3) comprises newel (12) and the steel cylinder outer cover (13) of concentric setting, on newel (12) outer wall, be from up to down provided with multilayer steps formula swivel chute (14), this step swivel chute (14) outside is fixed on the inwall of steel cylinder outer cover (13);

Electromagnetic vibrator (15) is installed after the top seal of newel (12);

In the discharging opening place of the bottom of bottom step swivel chute (16), be provided with and be placed in the cleaned coal chute (17) of inner side and the slate chute (18) in outside, between cleaned coal chute (17) and slate chute (18), be provided with to separate the dividing plate (19) of heavy particle and light grains, this dividing plate (19) can along the outer side shield place face of cleaned coal chute (17) obliquely or downwards, sliding near or sliding far away to steel cylinder outer cover (13) inwall, size with change with the aperture of slate chute (18) entrance, and then realize the adjusting to spoil load.

2. multistage combined dry coal preparation system as claimed in claim 1, it is characterized in that: described step swivel chute (14) comprises the downward chute groove face of rotation and be connected and rotate the substrate to downward-extension with newel (12) is vertical, the chute groove face cross section of every layer of step swivel chute (14) and the accordingly angle between substrate successively reduce from top to bottom;

Newel (12) bottom is provided with air intake interface (21), on newel (12) between the chute groove face of layer step swivel chute (14) of each more than the bottom and corresponding substrate, be provided with discharge pipe (22), it extends to steel cylinder outer cover (13) from newel (12), and on this discharge pipe (22), be provided with a plurality of exhaust vents that are axially evenly arranged along discharge pipe (22) or wind groove (23), and this exhaust vent or wind groove (23) arrange outward towards chute groove face cross section, with the sorting material to after unsettled to up-draught.

3. multistage combined dry coal preparation system as claimed in claim 2, is characterized in that: the material cross section rotating guide (24) that is inwardly provided with, extends obliquely on the inwall corresponding to the steel cylinder outer cover (13) at the outer rim place of every layer of step swivel chute (14);

This rotating guide (24) is fixedly connected with steel cylinder outer cover (13) by arcwall face, and its length along arcuate directions equals the length of described step swivel chute (14).

4. multistage combined dry coal preparation system as claimed in claim 3, it is characterized in that: the outer wall of steel cylinder outer cover (13) is respectively provided with the installation hook that four edges are circumferentially evenly arranged up and down, by wirerope, hook, hang on the rectangular frame being formed by 4 steel column Combination Welding, on this rectangular frame, corresponding to each hook place, be provided with a spring base platform, rectangular frame connects with hook by this spring base platform.

5. the multistage combined dry coal preparation system as described in claim 1 or 4, is characterized in that: described steel cylinder outer cover (13) top is provided with the sorting material feed hopper that dust cover that soft filter cloth makes and lower end penetrate blanking in this dust cover.

6. multistage combined dry coal preparation system as claimed in claim 4, it is characterized in that: the bed surface below of described sorting bed is provided with horizontal duct (20), its sorting material entrance one end opening from sorting bed also longitudinally extends to sorting bed end, and connect with a plurality of air compartments; The air outlet of sorting main air blower (10) is communicated with this horizontal duct (20), to provide distinguished and admirable;

The sorting material porch of sorting bed is provided with the vibrations feeder that is placed in charging coal bunker (1) outlet below, this vibrations feeder is the base plate (43) to the backboard extension of sorting bed by end, be placed in both sides of the edge before and after this base plate (43) and extend upward and front and rear baffle (44,45) that end extends to the backboard of sorting bed, the panel (46) that is placed in this base plate (43) front edge and extends upward and be connected with front and rear baffle (44,45), the feeding vibrator (47) that is arranged on this panel (46) lateral surface forms.

7. multistage combined dry coal preparation system as claimed in claim 6, is characterized in that: the air intake vent of described sorting main air blower (10) is communicated with the exhanst gas outlet (25) of powder fluidized bed compound burner, to obtain high-temperature flue gas;

Described powder fluidized bed compound burner comprises body of heater (26), be arranged on the spiral casing type coal fines burner installing hole (27) of body of heater (26) front end, be arranged on the burner hearth (28) in body of heater (26), be arranged on the outer preheated air passage (29) of body of heater (26), be arranged on the exhanst gas outlet (25) that body of heater (26) top communicates with burner hearth (28), be arranged on the ash discharging hole (30) that bottom of furnace body rear end communicates with burner hearth (28), preheated air passage (29) extends downward body of heater front bottom end after body of heater (26) top rear extends to forward body of heater top front end, body of heater (26) front end end is provided with the preheating gas outlet (31) communicating with preheated air passage (29), burner hearth the latter half arranges combustion fluidized bed (32) from ash discharging hole (30) between burner hearth (28) front end, the burner hearth first half and front end are refractory cement and water building body, body of heater (26) bottom is provided with the fluidisation blast orifice (33) communicating with combustion fluidized bed (32), on combustion fluidized bed (32) madial wall, be provided with the air outlet that a plurality of opening upwards communicate with burner hearth (29), and this air outlet communicates with fluidisation blast orifice (33) by the air channel in burner hearth,

Also comprise the combustion blower (49) that blast pipe is communicated with preheating gas outlet (31), its discharge pipe is communicated with each fluidisation blast orifice (33) by blowing line branch, ash discharging hole (30) locates to be also provided with ash discharge blast orifice (52), with the dust that ash discharging hole (30) is located in this air blast, is blown in ashpit.

8. multistage combined dry coal preparation system as claimed in claim 7, it is characterized in that: described spiral casing type coal fines burner, comprise that air intake connects pipeline section (34), is connected the wind coal dust air-out pipeline section (35) that is spiral inside coiling that pipeline section (34) connects with this air intake, the air outlet (36) of this air-out pipeline section (35) is connected pipeline section (34) with air intake vertical.

9. multistage combined dry coal preparation system as claimed in claim 8, it is characterized in that: be also included as the conveying-type online dry mechanism of the raw coal material after charging coal bunker (1) auxiliary breaking, this conveying-type online dry mechanism is combined by a plurality of conveying-type online dry device multi-stage serial connections;

This conveying-type online dry device comprises mass transport storehouse (37), be placed in oar blade type conveying axis (38) in mass transport storehouse (37), be arranged on top, one end, mass transport storehouse (37) material inlet (39), be arranged on other end bottom, mass transport storehouse (37) material outlet (40), be arranged on top, mass transport storehouse (37) can folding Cang Gai (41) and be arranged on the hot gas entrance (42) on material inlet (39); This hot gas entrance (42) is connected to obtain preheated air by pipeline with the discharge pipe of combustion blower (49).

10. multistage combined dry coal preparation system as claimed in claim 2, is characterized in that: the chute groove face of every layer of step swivel chute (14) and the angle between horizontal plane are large or equal 10 ° and little or equal 50 °.