CN2871016Y

CN2871016Y - Dry coal separator

Info

Publication number: CN2871016Y
Application number: CN 200620100139
Authority: CN
Inventors: 杨国华
Original assignee: Individual
Current assignee: Individual
Priority date: 2006-01-05
Filing date: 2006-01-05
Publication date: 2007-02-21
Anticipated expiration: 2016-01-05

Abstract

A dry coal classification device comprises a tank, a wind distributor, classification chambers under and above the tank and an air supply device, wherein a wind distributing area is arranged in the wind distributor, the head and tail of the wind distributor are respectively corresponding to the inlet orifice and the out-feed channel of the feeding hole on the tank. The utility model is characterized in that the group of block fences are orderly arranged on the upper space of the wind distributor in the direction from the inlet orifice to the out-feed channel, the neighboring baffle plates in each group of block fence form particle coal downspouting. With the adoption of the said structure, the characteristics of blocking wind but not the coal of the grids can be used to keep the air flow from the wind distributing area can maintain vertical upward flow trend, namely the air flow in the feed end can overcome the flow resistance generated by high concentrations of coal particles and flow upward so that large number of fine coal particles in the feed end can be separated, which not only gives full play to the space of the classification chambers and improves the handling capacity of the classification devices, but also enables the air flow in the feed end not slant to the discharge end which both reduces the burden of discharge end and improves classification results.

Description

Dry type gradation equipment for coal

Technical field

The utility model relates to a kind of device that loose unpacked material is separated, and refers in particular to a kind of dry type gradation equipment that is applicable to coal.

Background technology

The conventional method of coal being carried out classification is to adopt screening machine to sieve, but because screening machine exists the sieve pore blockade problem, and the dry type gradation equipment for coal of classification has appearred carrying out without screening machine.As China Patent No. is a kind of clasfficiator 93111761.5 " dry classification method for coal and device " discloses, it comprises casing, be installed in the vibrator on the casing, be positioned at grading room and the air-supply arrangement that is located at lower box on the casing, casing top is provided with charging aperture and the outlet that links to each other with grading room respectively successively, drive by vibrator in the installation of the middle part of casing, the oscillating plate that tilts of charging aperture dorsad, be furnished with the wind region that high opening rate band and low percent opening band form on this oscillating plate at interval, end at wind region is fixed with an internal partition downwards, and the top of wind region end is crossed with the adjustable plate of regulating the fluid bed height, wherein the blow tank that formation communicates with grading room between demarcation strip and the box inside wall.During use, the moist coal that mixes drops on the oscillating plate by charging aperture, and along with the vibration of oscillating plate, move in the grading room along the plate face, air that is provided by air-supply arrangement or hot flue gas pass oscillating plate and enter grading room, form several height, weathering zone, at height, under the mating reaction of weathering zone air-flow and the vibration of oscillating plate, in the grading room bottom, form moving bed above the oscillating plate, fluid bed, air flow bed combines, flow perturbation is strong, the gas-solid flow field of collision friction fierceness between particle, the moist coal group of mixing is disperseed fast, large coal particles is mobile status, move along oscillating plate, discharge from blow tank by the gap between adjustable plate and the oscillating plate apace, middle particulate coal overflows into blow tank in the overflow mode and discharges, small-particle coal is entrained with grading room by air-flow, collect by downstream separator and deduster, regulate air velocity, can make the arbitrary particle diameter of partition size in 0.5mm～6mm scope carry out high-effective classifying, and no dust pollution, so this device has solved the defective of conventional screen extension set well.But in use still find: because bigger near the coal grain concentration that distributes in the casing of charging aperture and the grading room space; this high-concentration coal grain can hinder this place's air-flow perpendicular flow that makes progress; promptly the air-flow that comes out near the wind region of charging aperture can not keep original flow direction vertically upward; but the gradually little discharging opening direction of oblique coal grain concentration flows; thereby cause following defective: (1) forms maelstrom in the zone, grading room middle and lower part of contiguous charging aperture; make this zone not have due grading; like this; both wasted the space of grading room; reduce the disposal ability of grading plant again, had the capacity usage ratio that has also reduced grading plant because of eddy current simultaneously.(2) air-flow of above-mentioned obliquely flow can promptly be pushed the coal grain to discharging opening, like this, increased the classification burden in discharge end zone on the one hand significantly, make those be forced to from the fine grained that grading room top is taken out of with air-flow from blow tank, discharge on the other hand, thereby reduced grading effect widely.

Summary of the invention

Technical problem to be solved in the utility model is the present situation at prior art, provides a kind of and both can improve classifying capability, can make the better dry type gradation equipment for coal of grading effect again.

The utility model solves the problems of the technologies described above the technical scheme that is adopted: this dry type gradation equipment for coal comprises casing, be positioned at grading room and the air-supply arrangement of being located at lower box on the casing, in the described casing ventilation terminal is installed, on this ventilation terminal, be furnished with and above-mentioned grading room bottom and the corresponding wind region of air-supply arrangement, and the head end of this ventilation terminal is corresponding to charging aperture, then be provided with the blow tank of the particulate coal discharge of being convenient on the ventilation terminal on the terminal corresponding casing with it, it is characterized in that: be distributed with successively in the space of described ventilation terminal top by charging aperture to the some groups of barrier hurdles that the blow tank side direction is arranged, formed the particulate coal chute of corresponding height between the adjacent separator in every group of barrier hurdle.

As further improvement of the utility model, the described upper end of respectively organizing the barrier hurdle preferably all tiltedly is provided with to described charging aperture inclination.And the spacer width in every group of barrier hurdle with mutually wide with described casing or grading room be good.

As another kind of improvement the of the present utility model, described ventilation terminal can be designed to the percent opening of its center wind region percent opening less than its dual-side zone.Also can be designed to the high concave structure in low border area, both sides, center.

Compared with prior art, owing to be provided with some groups of grid hurdles in the ventilation terminal superjacent air space of the present utility model, thereby can utilize and respectively organize the grid hurdle and keep out the wind and do not keep off the characteristic of coal, the air-flow that the corresponding position wind region is come out still can keep mobile vertically upward, the air-flow that is to say the feed end zone can overcome the flow resistance that the high-concentration coal grain produces and the trend that still can realize upwards flowing, thereby eliminated the maelstrom in the former grading room middle and lower part effectively, a large amount of duff grains is separated in the feed end zone, so both given full play to the grading room space, improve the disposal ability of grading plant, make again and the no longer oblique discharge end of air-flow in feed end zone when alleviating discharge end zonally-graded burden, improve grading effect.

Description of drawings

Fig. 1 is the structural representation of the embodiment of the invention;

Fig. 2 is the structural representation of ventilation terminal among Fig. 1;

Fig. 3 be among Fig. 2 A-A to structural representation;

Fig. 4 is the another kind of structural representation of ventilation terminal among Fig. 1.

The specific embodiment

Embodiment describes in further detail the utility model below in conjunction with accompanying drawing.

As shown in Figure 1, this dry type gradation equipment for coal comprises casing 1, be positioned at the grading room 2 on the casing and be located at the air-supply arrangement 3 of lower box, wherein, grading room 2 is that the outlet area on prismatic current stabilization district and top is formed by the big up and small down pyramidal area in bottom, middle part again, and grading room 2 bottoms link to each other with the top of casing 1.Here, grading room 2 is right against casing 1, makes the effective area of classification bigger.And being provided with charging aperture 21 at its antetheca, 21 places are equipped with coal charge conveyer belt 9 at charging aperture, so that the input of coal charge.And ventilation terminal 4 is installed in the casing 1, on this ventilation terminal 4, be furnished with and above-mentioned grading room 2 bottoms and air-supply arrangement 3 corresponding wind regions, and its head end is corresponding to above-mentioned charging aperture 21, and terminal corresponding casing 1 is provided with the blow tank 22 that the particulate coal be convenient on the ventilation terminal is discharged with it.Be distributed with successively in the space above this ventilation terminal simultaneously by charging aperture 21 to the some groups of barrier hurdles 5 that blow tank 22 side directions are arranged, formed the particulate coal chute 52 of corresponding height between the adjacent separator 51 in every group of barrier hurdle 5.Here, the dividing plate 51 in every group of barrier hurdle is across on described casing or the grading room, and its length equates with casing or grading room width.And the upper end of each dividing plate 51 all tiltedly is provided with to charging aperture 21 inclinations, and makes every group of barrier hurdle be skewed.

In the present embodiment, the coal that forms between above-mentioned ventilation terminal 4 head ends and the charging aperture 21 feeds the district and is provided with the coal that coal charge is sent out on ventilation terminal 4 bed surfaces continuously and sows device 7.Here, this coal is sowed device and is adopted the air nozzle 71 that links to each other with source of the gas, and air nozzle 71 is positioned on the wall of charging aperture 21, promptly be positioned on the charging aperture wall of conveyer belt 9 belows, when coal charge when conveyer belt 9 falls, the air-flow by air nozzle 71 ejections scatters coal charge on the bed surface of ventilation terminal 4, and large coal particles is spread closely from charging aperture, and fine particulate coal is sowed far from charging aperture.Certainly, it also can be that the machinery that is positioned at charging aperture is sowed device that this coal is sowed device, is a rotary blade by the driving mechanism drive.Perhaps be one can be around the coal passing plate of its upper shaft swing.Perhaps be one group of skewed guide plate of on short transverse, placing at interval, form the inclination coal outlet under the corresponding height between each guide plate successively.Or above-mentioned air nozzle and mechanical mutual combination of sowing device.

In order to have better grading effect, ventilation terminal 4 is designed to the percent opening of its center wind region percent opening here less than its dual-side zone, this ventilation terminal can adopt structure as shown in Figures 2 and 3 to realize, promptly this ventilation terminal 4 comprises a plurality of gratings 41, bracket 42 and cushion block 44, each grating 41 and cushion block 44 compartment of terrain successively are enclosed within on the bracket 42 and are tightened to one, to form the bar shaped sieve, the slit that forms between each grating 41 is the ventilation strip hole.Grating is placed with 0 °～30 ° inclination angle.Like this, change cushion block 44 thickness can be regulated the gap width between the adjacent grating 41, the size of just regulating air vent.Can stop up a strip hole with pad 43, to reduce the air output in this zone every some ventilation strip holes at ventilation terminal center wind region simultaneously.Like this because the percent opening in ventilation terminal dual-side zone is bigger, eliminated wall effect, make the coal charge that is slipped to the ventilation terminal dual-side can be thrown or get back to the center again again and by throwing once more, thereby form the repeatedly circulation upthrow of particle, fine grained is wherein fully separated, avoided from blow tank 22, discharging, finally guaranteed grading effect owing to wall effect makes the duff material.

In the present embodiment, above-mentioned ventilation terminal 4 also can be designed as the concave structure that the center is low, the border area, both sides is high, as shown in Figure 4, be layered on this ventilation terminal 4 ' when going up when coal charge like this, make that the coal charge of ventilation terminal center is thicker, and the coal charge in border area, both sides is thinner, and such structure can reach the purpose of eliminating wall effect equally.

Above-mentioned air-supply arrangement 3 comprises the L type branch air channel 31 and the branch air-valve 32 that is installed in each minute air channel air inlet place that the ventilation terminal below is separated into a plurality of gradual transition again, each minute the air channel air outlet corresponding to the wind region of described ventilation terminal, wind speed between each minute air channel is independent of each other like this, so that the adjusting of air quantity, can also reduce duct resistance, cut down the consumption of energy.

Above-mentioned ventilation terminal 4 can also be realized vibration by means of vibrator 6, and this vibrator adopts the exciting mode of driven by motor eccentric block, also can adopt known technologies such as vibrating motor.When vibrator 6 energising vibrations, but drive case 1 and ventilation terminal 4 vibrations, and this vibration force can be quickened the coarse granule coal charge and move on ventilation terminal 4, and large coal particles is successfully discharged.

The situation that might occur the charging inequality when considering practical operation can cause the coal charge packing phenomenon of ventilation terminal 4 head ends thus.In case and after coal charge piles up, make the wind region at this place go out wind resistance and increase that wind speed reduces and causes that wind-force is not enough and produce vicious circle, finally causes the termination of classification work.Therefore for fear of the generation of this phenomenon, below ventilation terminal 4 head ends, be provided with an independent ventiduct 8, the air inlet of this independent ventiduct 8 links to each other with independent blower fan, like this in case packing phenomenon occurs, just independent blower fan and the independent ventiduct by this place provides enough wind-force, give the air-supply of ventilation terminal head end, loose to upthrow in the coal seam at this place, thereby guarantee normally carrying out of classification work.

During work, coal falls on the bed surface of ventilation terminal 4 by charging aperture 21, and air or hot flue gas through each minute air channel 31 pass ventilation terminal 4 from bottom to top along the air vent on the ventilation terminal 4 and enter in the grading room 2, because the effect on every group of barrier hurdle 5, air-flow can not pass the barrier hurdle because of having increased to hinder to fall everywhere, can only keep mobile vertically upward.The coal grain of different sizes then can pass through the particulate coal chute of corresponding height to the blow tank side shifting, and under the effect of the vibration of said flow, vibrator 6 and independent ventiduct 8 and blower fan, make the coal seam on the ventilation terminal form vibrated fluidized bed, make the coal of different sizes be different motion states, its classification principle is same as the prior art, is not repeated at this.

Claims

1, a kind of dry type gradation equipment for coal, it comprises casing (1), be positioned at the grading room (2) on the casing and be located at the air-supply arrangement (3) of lower box, ventilation terminal (4) is installed in the described casing, on this ventilation terminal (4), be furnished with and above-mentioned grading room (2) bottom and the corresponding wind region of air-supply arrangement (3), and the head end of this ventilation terminal (4) is corresponding to charging aperture (7), then be provided with the blow tank (8) of the particulate coal discharge of being convenient on the ventilation terminal on the terminal corresponding casing with it, it is characterized in that: be distributed with successively in the space of described ventilation terminal (4) top by charging aperture (7) to the some groups of barrier hurdles (5) that blow tank (8) side direction is arranged, formed the particulate coal chute (52) of corresponding height between the adjacent separator (51) in every group of barrier hurdle.

2, dry type gradation equipment for coal according to claim 1 is characterized in that: the described upper end of respectively organizing barrier hurdle (5) all tiltedly is provided with to described charging aperture (7) inclination.

3, dry type gradation equipment for coal according to claim 1 and 2 is characterized in that: the dividing plate (51) in described every group of barrier hurdle (5) is across on described casing or the grading room, and its length equates with described casing or grading room width.

4, dry type gradation equipment for coal according to claim 3 is characterized in that: the center wind region percent opening of described ventilation terminal (4) is less than the percent opening in its dual-side zone.

5, dry type gradation equipment for coal according to claim 3 is characterized in that: described ventilation terminal is designed to the high concave structure in low border area, both sides, center.

6, dry type gradation equipment for coal according to claim 1 and 2 is characterized in that: the center wind region percent opening of described ventilation terminal is less than the percent opening in its dual-side zone.

7, dry type gradation equipment for coal according to claim 1 and 2 is characterized in that: described ventilation terminal is designed to the high concave structure in low border area, both sides, center.