CN112958263A - Coal dry separation system for full cloth bag dust removal - Google Patents
Coal dry separation system for full cloth bag dust removal Download PDFInfo
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- CN112958263A CN112958263A CN202110354702.XA CN202110354702A CN112958263A CN 112958263 A CN112958263 A CN 112958263A CN 202110354702 A CN202110354702 A CN 202110354702A CN 112958263 A CN112958263 A CN 112958263A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03B—SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
- B03B4/00—Separating by pneumatic tables or by pneumatic jigs
- B03B4/02—Separating by pneumatic tables or by pneumatic jigs using swinging or shaking tables
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- B01D46/02—Particle separators, e.g. dust precipitators, having hollow filters made of flexible material
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Abstract
本发明提供一种全布袋除尘的煤炭干选系统，其包括原煤给料部分、供风部分、分选部分和除尘部分，其中智能调风除尘系统包括除尘管道、全布袋除尘器和布袋引风机，在分选部分上部设置的全密闭集尘罩将分选部分所产生的粉尘经由除尘管道输送到除尘器进风口。本发明的全布袋除尘的煤炭干选系统采用全布袋除尘器，所有循环风路都是经过布袋除尘器，布袋除尘器的除尘效率可达99％以上，可以除去风路中99％的粉尘，完全实现了清风选煤，而且布袋除尘器的阻力比旋风除尘器的阻力要小得多，可以减少主风机电机的能耗，又可以节省能源。
The invention provides a coal dry separation system with full bag dust removal, which includes a raw coal feeding part, an air supply part, a sorting part and a dust removal part, wherein the intelligent air regulation and dust removal system includes a dust removal pipe, a full bag dust collector and a bag induced draft fan , The fully enclosed dust collecting hood set on the upper part of the sorting part transports the dust generated by the sorting part to the air inlet of the dust collector through the dust removal pipeline. The full-bag dedusting coal dry-selection system of the present invention adopts a full-bag dust collector, and all the circulating air passages pass through the bag dust collector. The clean air coal preparation is completely realized, and the resistance of the bag filter is much smaller than that of the cyclone, which can reduce the energy consumption of the main fan motor and save energy.
Description
Technical Field
The invention belongs to the technical field of coal separation, and particularly relates to a coal dry separation system for full-bag dust removal, which is suitable for a coal separation system with ultra-large processing capacity.
Background
Coal is a solid combustible mineral formed gradually by ancient plants buried underground and undergoing complex biochemical and physicochemical changes. Coal is known as black gold by people and is industrial food, which is one of main energy sources used in the human world since the eighteenth century, and since the twenty-first century, although the value of coal is not as high as before, coal is one of indispensable energy sources for production and life of human beings at present and in a long time in the future after all, the supply of coal is also related to the stability of the development of the industry of China and the aspect of the whole society, and the problem of the supply safety of coal is also the most important part in the energy safety of China.
Coal separation mainly comprises two directions of water washing and dry separation, the water washing basically adopts the processes of jigging, dense medium, flotation and the like, and the method has the advantages of mature process, high separation precision and high processing capacity. The disadvantages of large construction investment, long period, high production cost, large water resource consumption and waste, and the water consumption of washing 1 ton of raw coal is about 0.1m3In addition, low quality by-products such as coal slurry are also produced. The dry separation is a coal separation method which exists and develops slowly in the last two decades, has the advantages of no water, simple process, less investment and low production cost, and the main representative process is a wind power dry coal separation process. From the coal distribution region, the west accounts for 80.4% of the country, the middle accounts for 15.2% of the country, and the east accounts for 4.4% of the country. The western part is the main distribution area of the coal in China and is just the dry and little water area, so compared with water washing, dry separation has wider requirements and prospects, and large-area popularization is achieved in China and all over the world in a very short period. Water content of coal and ash and sulfur contentsAnd the important factors of coal quality are influenced. To improve the quality of coal, the coal must be dewatered and sorted. With the development of coal upgrading technology, coal drying and dry separation processes are widely applied in the coal upgrading technology, and remarkable success is achieved.
However, the existing wind-force dry coal separation technology has the defects of poor separation precision, small processing capacity, high requirement on coal types and the like. In addition, after the screening of coal is realized, the screening device for the existing intelligent coal dry separator needs to crush coal particles with larger particles so as to meet the subsequent processing requirement and greatly reduce the working efficiency; moreover, the coal screening device can generate a large amount of dust in the process of screening coal, the dust can pollute the surrounding environment, and the health of operators can be seriously affected when the operators work in the working environment for a long time. In addition, a large amount of energy is consumed in the process of treating the dust.
Therefore, the wind-force dry coal dressing process needs to be further improved and improved, so that the process is more suitable for being used for sorting in various occasions or mining areas.
Disclosure of Invention
Based on the problems in the prior art, the invention provides a coal dry separation system for full bag dust removal, which not only solves the technical problems in the prior art, but also improves the coal separation processing capacity and reduces the energy consumed in the separation process.
According to the technical scheme of the invention, the coal dry separation system with full cloth bag dust removal comprises a raw coal feeding part, an air supply part, a separation part and a dust removal part, wherein the raw coal feeding part comprises a product conveyor, a buffer bin and an intelligent conveying device; the intelligent air-adjusting dust-removing system comprises a dust-removing pipeline, a full-bag dust remover and a bag induced draft fan, wherein a fully-closed dust collecting hood arranged at the upper part of the separation part conveys dust generated by the separation part to an air inlet of the dust remover through the dust-removing pipeline.
The air containing impurities or dust from the air inlet of the dust remover enters the full-bag dust remover, and the full-bag dust remover is connected with the air inlet pipeline of the left main fan and the air inlet pipeline of the right main fan. The full-bag dust collector conveys the purified gas back to the left main fan through the air inlet pipeline of the left main fan, and the full-bag dust collector conveys the purified gas back to the right main fan through the air inlet pipeline of the right main fan.
Furthermore, the dust removal part also comprises a cloth bag induced draft fan, the cloth bag induced draft fan is connected with an induced draft fan chimney and an induced draft pipeline, and atmospheric gas is introduced into the cloth bag induced draft fan through the induced draft fan chimney.
Further, the air flow processed by the bag induced draft fan is sent to the full bag dust collector through an induced draft pipeline and is used for supplementing the air lost in the separation process. Preferably, all the circulation air paths pass through the bag-type dust collector.
In addition, the coal dry separation system for full bag dust removal further comprises a fully-closed dust collecting hood, and the fully-closed dust collecting hood is buckled on the separation part, so that fully-closed separation is realized.
In addition, the coal dry separation system for full bag dust removal further comprises a quick access door, and a plurality of quick access doors are arranged right in front of the fully-closed dust collection hood. Two sets of pipeline holes are formed in the fully-closed dust collecting cover, the two sets of pipeline holes are respectively connected to the full-bag dust collector, and an independent dust collection power system is arranged in each pipeline hole and used for adjusting dust collection power of each pipeline hole of the independent dust collection power system according to dust concentration difference in the upper space of the vibration separation bed.
The coal dry separation system adopting the full-bag dust collector adopts the full-bag dust collector, all the circulating air paths pass through the bag dust collector, the dust collection efficiency of the bag dust collector can reach more than 99 percent, 99 percent of dust in the air paths can be removed, the clean air coal separation is completely realized, the resistance of the bag dust collector is much smaller than that of the cyclone dust collector, the energy consumption of a main fan motor can be reduced, and the energy can be saved.
Drawings
FIG. 1 is a schematic structural diagram of a coal dry separation system for full bag dust removal according to the present invention;
FIG. 2 is a top view of the vibratory sorting bed of FIG. 1;
FIG. 3 is a schematic view of the through holes in the deck of the vibratory separator bed of FIG. 2;
FIG. 4 is a schematic longitudinal side view of the vibratory sorting bed of FIG. 1;
FIG. 5 is a schematic longitudinal side view of a vibratory sorting bed with mounted sorting bars;
FIG. 6 is a schematic view of the vibration direction of the backplate shown in FIG. 4;
FIG. 7 is a cross-sectional view of a coal dry separation system with a separation bed of a product chute;
FIG. 8 is an external view of a full bag dedusting coal dry separation system with a quick access door;
FIG. 9 is a schematic view of a loading conveyor system based on FIG. 8;
FIG. 10 is a partial view of a dust removal system of a coal dry separation system for full bag dust removal;
FIG. 11 is a schematic cross-sectional view of a dedusting air duct;
fig. 12 is a schematic diagram of air blast separation of a coal dry separation system for full bag dust removal.
The reference numbers in the figures are as follows: 1. a left main blower; 2. a left main blower air valve; 3. a left air distributor; 4. a product grading chute; 5. a host support; 6. a right air distributor; 7. a right main blower air valve; 8. a right main blower; 9. an air inlet of the dust remover; 10. a full bag dust collector; 11. a fully-closed dust collecting hood; 12. a dust removal pipeline; 13. a left main fan air inlet pipeline; 14. a right main fan air inlet pipeline; 15. a main selection bed; 16. hanging a host; 17. an air inducing duct; 18. a cloth bag induced draft fan; 19. a chimney of the induced draft fan; 21. a material inlet; 22. a clean coal discharge chute; 23. a middling discharging chute; 24. a gangue discharge chute; 25. a waste rock discharge cylinder; 26. a gangue overflow outlet; 28. a bed panel with sorting air holes; 701. a left inspection observation window; 702. a right overhaul observation window; 91. a belt scale; 92. a belt conveyor; 1501. a longitudinal angle monitor; 1502. a lateral angle monitor; 1101. a quick access door; 1102. dust filtration cloth; 8-1, a horizontal air inlet pipe of the dust remover; 8-2, connecting an air inlet of the dust remover with a square pipe; 8-3, a dust remover air inlet inspection blind plate; 31. sorting air holes; 32. a bed panel; 41. a back plate; gradually-high lattice bars b1, b2, b3, … … and bn … ….
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, not all embodiments. All other embodiments obtained by a person skilled in the art based on the embodiments in the patent of the invention without any inventive work belong to the protection scope of the patent of the invention.
The invention provides a coal dry separation system for full bag dust removal, and figure 1 is a schematic structural diagram of the coal dry separation system for full bag dust removal according to the invention. As shown in fig. 1, the coal dry separation system for full bag dust removal comprises a raw coal feeding part, an air supply part, a separation part and a dust removal part, wherein the raw coal feeding part comprises a product conveyor, a buffer bin and an intelligent conveying device, the separation part comprises a host bracket, an intelligent separation bed device, a host hanging and discharging device, the air supply part comprises an intelligent air adjusting system consisting of a left main fan and a right main fan, and the dust removal part comprises an intelligent air adjusting and dust removal system.
Further, raw coal (including but not limited to coal products or coal materials) is conveyed into a buffer bin by a raw coal product conveyor to wait for sorting, and the raw coal in the buffer bin is intelligently distributed to a sorting part through an intelligent conveying device to be sorted. The sorting part comprises a host bracket 5, an intelligent vibration main sorting bed device, a host hanger 16 and a discharging device, wherein the intelligent vibration main sorting bed device is arranged on the host bracket 5 through the host hanger 16, the intelligent vibration main sorting bed device comprises a main sorting bed 15, and the discharging device is a material receiving chute positioned at the lower part of the intelligent vibration main sorting bed device. The receiving chute is preferably a product chute 4.
The air supply part comprises an intelligent air adjusting system consisting of a left main fan 1 and a right main fan 8, the left main fan 1 is connected to a left air distributor 3 through a left main fan air valve 2, and the left air distributor 3 blows separation air into a first group of separation chambers; the right main blower 8 is connected to the right air distributor 6 via a right main blower air valve 7, and the right air distributor 6 blows the separation air into the second group of separation chambers.
The dust removing part comprises an intelligent air adjusting dust removing system, the intelligent air adjusting dust removing system comprises a dust removing pipeline 12, a full-bag dust remover 10 and a bag-type induced draft fan 18, a fully-closed dust collecting cover 11 arranged at the upper part of the separating part conveys dust generated by the separating part to a dust remover air inlet 9 through the dust removing pipeline 12, gas containing impurities or dust through the dust remover air inlet 9 enters the full-bag dust remover 10, the full-bag dust remover 10 is connected with a left main fan air inlet pipeline 13 and a right main fan air inlet pipeline 14, the air inlet pipeline 13 of the left main fan 1 conveys the gas purified through the full-bag dust remover 10 back to the left main fan 1, and the air inlet pipeline 14 of the right main fan 8 conveys the gas purified through the full-bag dust remover 10 back to the right main fan 8. The dust removal part further comprises a bag induced draft fan 18, the bag induced draft fan 18 is connected with an induced draft fan chimney 19 and an induced draft pipeline 17, the induced draft pipeline 17 introduces dust-containing gas into the full bag-type dust remover 10, and part of clean gas treated by the bag-type dust remover 10 is discharged into the atmosphere through the induced draft fan chimney 19.
Further, a left inspection window 701 is preferably provided in the duct through which the left main blower 1 is fed into the left air distributor 3 through the left main blower air valve 2. Similarly, a right inspection window 702 is preferably provided on the duct of the right air splitter 6 through the right main blower 8 via the right main blower air valve 7. More preferably, a left service viewing window 701 is provided between the left main blower damper 2 and the left air splitter 3 and a right service viewing window 702 is provided between the right main blower damper 7 and the right air splitter 6.
The coal dry separation system for full bag dust removal is provided with a multi-air-source system consisting of a plurality of main fans, so that intelligent air regulation is realized. In the winnowing process, the differentiated air supply requirements are realized according to different air quantities required by each part of the main separating bed 15. Compared with the existing dry separator which only has one main fan, the air quantity and the air pressure of an air source are single and unadjustable, the main separation bed area of the coal dry separation system for the full bag dust removal is very large, the air chambers are more than ten, and the air quantity and the air pressure required by each air chamber have different parameters according to different corresponding positions under the main separation bed; furthermore, the technical problem that the air pressure is still the same parameter even if the air quantity is adjustable because a main air source is arranged below the oversized sorting bed surface is solved. A multi-wind source system is adopted, so that the adjustment of the sorting parameters of the dry separator is realized; the air supply quantity of the air sources can be adjusted at any time, and the air sources can be distributed according to the separation parameters required by each air chamber, so that the separation precision can be improved, the energy consumption can be reduced from the environmental protection perspective, the energy and the electricity are saved, and unnecessary waste is avoided.
Furthermore, the coal dry separation system adopting full bag dust removal adopts an intelligent air-adjusting dust removal system, and abandons the scheme of double configuration of cyclone dust removal and bag dust removal adopted by the original coal dry separation system. The original coal dry separator dust remover system is provided with a cyclone dust remover and a bag dust remover, the cyclone dust remover has large processing air volume and small occupied area, the processed air is used as circulating air for continuous use, the dust removing path trend is that a main fan leads the air out of an equipment dust hood and enters the cyclone dust remover through a pipeline, large particle dust is removed in the cyclone dust remover, then the large particle dust enters the main fan, the main fan feeds the air chamber, the air chamber feeds the main separation bed, the main separation bed enters the dust hood and is sucked away by the main fan again, and the process is repeated and circulated, so that the air path circulation of the dry separator equipment is ensured; the bag-type dust collector also draws air from the dust hood, so that negative pressure is generated on a balanced air path, and dust is prevented from overflowing. However, the cyclone dust collector can only remove large-particle dust in the air path, and the fine dust circulates in a closed circuit along with the wind, and more dust is discharged after the dry separator runs for a long time. The full-bag dust collector preferably adopts an intelligent air-adjusting dust-removing system.
The coal dry separation system adopting the full-bag dust collector adopts the full-bag dust collector, all the circulating air paths pass through the bag dust collector, the dust collection efficiency of the bag dust collector can reach more than 99 percent, 99 percent of dust in the air paths can be removed, the clean air coal separation is completely realized, the resistance of the bag dust collector is much smaller than that of the cyclone dust collector, the energy consumption of a main fan motor can be reduced, and the energy can be saved.
As shown in fig. 2, the coal dry separation system for full-bag dust removal adopts a pentagonal intelligent vibration main separation bed surface with three right-angle sides, the movement direction of gangue is pushed forward along the transverse direction of the intelligent vibration main separation bed, and the movement direction of clean coal is pushed forward along the longitudinal direction of the intelligent vibration main separation bed. The discharging section of the clean coal adopts a trapezoidal frame. Coal materials are intelligently distributed to a material inlet 21 of the intelligent vibration main selection bed through an intelligent conveying device and conveyed to a bed body of the intelligent vibration main selection bed through the material inlet 21, and a plurality of separation gradually-high lattice bars b1, b2, b3, … … and bn … … are arranged on the intelligent vibration main selection bed; select separately gradually high check strip and lay on intelligent vibration main selection bed, select separately gradually high check strip and intelligent vibration main selection bed pan feeding frame and be certain separation contained angle N, wherein select separately contained angle N and be the acute angle, set up the size of this separation contained angle according to the coal composition or the moisture of equipment fixing mining area, and then realized selecting separately the index according to local conditions, furthest promotes the sorting precision. The material inlet 21 is arranged at the edge of the feeding frame of the intelligent vibration main separation bed, preferably, the highest point of the feeding frame of the intelligent vibration main separation bed is overlapped with the highest point of the material inlet 21, so that coal materials are vibrated and propelled to the waste rock discharging frame of the intelligent vibration main separation bed along the upper frame of the intelligent vibration main separation bed, a certain material propelling angle M is formed between each high point oblique connecting line of a plurality of separation gradually-high lattice bars b1, b2, b3, … … and bn … … and the upper frame of the intelligent vibration main separation bed, the material propelling angle M is set according to the impurity content of the waste rocks of coal carbons separated on site, and the separation degree of clean coal, medium coal and waste rocks is improved as much as possible. A gangue discharge channel is arranged close to the gangue discharge frame of the intelligent vibration main separation bed, the separated gangue is discharged from a gangue discharge groove 24 along the gangue discharge channel, a gangue overflow outlet 26 is arranged at the top end of the gangue discharge frame of the intelligent vibration main separation bed, and the gangue overflow outlet 26 is used for quickly discharging large gangue or accumulated gangue; in addition, compared with the existing dry separation system, the coal dry separation system with full cloth bag dust removal has the advantages that the coal separation amount per unit time is higher by more than 30%, and a large amount of gangue is generated in a short time, so that a gangue discharge cylinder 25 is additionally arranged on the side face of a gangue discharge frame of the intelligent vibration main separation bed, and the gangue which cannot be discharged through a gangue discharge chute 24 and a gangue overflow outlet 26 can be discharged through the gangue discharge cylinder 25. The lower separation frame of the intelligent vibration main separation bed is respectively and sequentially provided with a clean coal discharging groove 22, a middlings discharging groove 23 and a gangue discharging groove 24, and the separation side length occupied by the clean coal discharging groove 22, the middlings discharging groove 23, the gangue discharging groove 24 and the like is determined according to the separation area of the bed body of the intelligent vibration main separation bed, the set vibration frequency of vibration separation and the impurity content and water content of coal. The sorting lower frame of the intelligent vibration main separation bed is in a broken line shape, namely, part of the sorting lower frame of the intelligent vibration main separation bed is perpendicular to the feeding frame of the intelligent vibration main separation bed and is parallel to the sorting upper frame of the intelligent vibration main separation bed, and part of the sorting lower frame of the intelligent vibration main separation bed is folded upwards in the clean coal sorting area and forms an obtuse angle with the gangue discharge frame of the intelligent vibration main separation bed, so that the travel of gangue and clean coal is sequentially shortened, and the treatment capacity is increased.
The coal dry separation system for full cloth bag dust removal adopts a pentagonal intelligent vibration main separation bed surface with three right-angle sides, firstly, the transverse distance of a discharge end of waste rock is shortened, and the retention time of the waste rock on the main separation bed is reduced; secondly, the longitudinal distance of the clean coal discharge end is shortened, and the distance of an air chamber is transversely prolonged from the foremost end of the main separation bed to the gangue end, so that the area of the clean coal discharge end can be basically kept unchanged, and the changes are all to reduce the retention time of materials on the main separation bed. The lower corner is modified into a broken line trapezoid, thereby shortening the travel of gangue and clean coal and increasing the treatment capacity.
As further shown in fig. 2, the length of the sorting lower frame of the part of the intelligent vibration main sorting bed, which is perpendicular to the feeding frame of the intelligent vibration main sorting bed and parallel to the sorting upper frame of the intelligent vibration main sorting bed, is a3, the length of the sorting lower frame of the other intelligent vibration main sorting beds is a4, the length ratio is set according to the sorting amount of clean coal and the sorting degree of clean coal, for example, sorting coal into super clean coal, middlings, miscellaneous middlings, gangue and the like, and at this time, the length ratio of the broken line of the sorting lower frame of the intelligent vibration main sorting bed is adjusted according to the user's needs; similarly, the length a5 of the frame of the gangue discharge of the intelligent vibration main separation bed is set according to the gangue moving speed and the drying speed of the separated coal; the intelligent vibration main sorting bed feeding frame is divided into a material inlet 21 part and a clean coal sorting side, the length of the material inlet 21 part is a1, the length of the clean coal sorting side is a2, and the proportion between a1 and a2 of the intelligent vibration main sorting bed feeding frame is set according to the amount of coal conveyed to the vibration sorting part in unit time. Arranging an upper frame of the intelligent vibration main separation bed at the gangue discharge port 26, wherein the length of the gangue discharge port 26 is a6, and the proportion between the length a6 and the length a7 of the rest part of the upper frame of the intelligent vibration main separation bed is set according to the amount of gangue; alternatively, the gangue discharge 26 may be closed for situations where the amount of gangue discharged is relatively small.
Furthermore, a plurality of gradually-high sorting grid strips b1, b2, b3, … … and bn … … are sequentially arranged in parallel, high points b12, b22, b32, … … and bn2 … … of each gradually-high grid strip form an oblique line (connecting line), each high point oblique connecting line and the upper frame of the intelligent vibration main sorting bed form a certain material propelling angle M, and low points b11, b21, b31, … … and bn1 … … of each gradually-high grid strip are respectively connected with the feeding frame of the intelligent vibration main sorting bed and the sorting lower frame of the intelligent vibration main sorting bed. As shown in fig. 5, the gradually-high bars are fixed on the bed panel, and the high point of each gradually-high bar is close to the intelligent vibration main selection bed back plate 41. The height of the high points of the gradually-high grating is greater than that of the low points of the gradually-high grating.
Compared with the prior bed panel lattice bars with equal height, the lattice bars of the intelligent vibration main selection bed have the function that materials with high density can move upwards along the lattice bars when the main selection bed works, so that the materials form an obvious boundary zone for separating the materials with high density and low density on the main selection bed. The main sorting bed of the invention has large material passing amount, while the prior grid bars have the problems that the height is far smaller than the thickness of the material of the bed layer and the movement track of the material with large density is unstable, and the prior grid bars are not suitable for sorting the material with large processing amount. The gradually-high lattice bars shown in figure 5 are adopted, and the height of the lattice bars from the back plate to the discharging side is gradually reduced, so that the movement track of high-density materials is kept stable during diffusion impact of the fed materials, and the rapid discharging of the low-density materials at the discharging end is facilitated.
As shown in fig. 2 and 3, the separation air holes 31 are distributed on the panel of the intelligent vibration main separation bed, and the diameter of the separation air hole close to the upper separation frame of the intelligent vibration main separation bed is gradually larger than that of the separation air hole close to the lower separation frame of the intelligent vibration main separation bed. Specifically, referring to fig. 3, the separation air hole 31 and the intelligent vibration main selection bed panel are arranged in an inclined manner, that is, the separation air hole 31 and the intelligent vibration main selection bed panel are not arranged vertically, the air direction of the intelligent vibration main selection bed panel passing through the bed panel is vertically incident to the intelligent vibration main selection bed panel, that is, the separation air flow is vertically incident to the intelligent vibration main selection bed panel, and the separation air flow passing through the separation air hole 31 is inclined out from the bed panel and is emitted to the separation coal material. Correspondingly, the partition plates of the bed panel are arranged between the separation air holes 31 at intervals and used for adjusting the distance between the separation air holes 31. The intelligent vibration main separation bed panel is preferably a bed panel 28 with separation air holes.
The existing traditional bed surface sorting air holes are vertical through holes, and air is blown out vertically through the small holes; the sorting air holes of the bed panel of the intelligent vibration main sorting bed are changed into inclined holes, and the inclined direction is the discharge end, so that when air flow is blown out of the sorting air holes, an acting force in the inclined direction and the discharge direction is generated, and the acting force can accelerate the movement speed of materials on the bed surface. Preferably, only the first bed surface hole at the feeding end of the bed panel of the intelligent vibration main separation bed is changed into an inclined hole, the inclined direction is the discharging end, and the separation air holes of other bed panels of the intelligent vibration main separation bed adopt vertical separation air holes.
Fig. 4 is a schematic longitudinal side view of the intelligent vibration main sorting bed of fig. 1, and fig. 5 is a schematic longitudinal side view of the intelligent vibration main sorting bed with the sorting grid bars installed. As shown in fig. 4 and 5, the coal dry separation system for full bag dust removal adopts a back plate structure, the back plate is perpendicular to the intelligent vibration main selection bed panel, and the back plate 41 is arranged on the separation upper frame of the intelligent vibration main selection bed panel and is fixedly connected together. Optionally, the back plate 41 is detachably connected to the sorting upper rim of the intelligent vibration main sorting bed panel 32. As shown in fig. 6, the vibration direction of the back plate is parallel to the longitudinal thrust applied to the coal material, that is, the coal material is subjected to downward longitudinal thrust under the dual actions of the vibration of the bed surface and the back plate. The back plate and the ground form a certain included angle alpha.
The bed panel of the intelligent vibration main sorting bed adopts the vertically arranged back panel, and directly provides a longitudinal thrust for coal materials in sorting. Compared with the traditional main sorting bed, the angle between the back plate and the main sorting bed surface is an acute angle of 60-70 degrees, and the existing back plate has the function of turning materials on the main sorting bed based on the sorting principle of a dry sorting machine; the angle of the back plate is changed into vertical 90 degrees, so that the original turning acting force is converted into a thrust force for forward movement of the materials in the sorting process of the dry separator, and the movement speed of the materials on the bed surface is accelerated.
Furthermore, as shown in fig. 4, a longitudinal angle monitor 1501 and a transverse angle monitor 1502 are installed on the main bed selector, the longitudinal angle monitor 1501 is used for monitoring the longitudinal vibration angle of the intelligent vibration main bed selector, and the transverse angle monitor 1502 is used for monitoring the transverse vibration angle of the intelligent vibration main bed selector; the angle parameters of the main separation bed body are displayed in real time, the automatic adjustment of the main separation bed body is completed by more effectively matching production, and the intellectualization of the coal dry separation system for full cloth bag dust removal is greatly improved.
As shown in fig. 7 and 8, the external view of the coal dry separation system of the full bag dedusting with the quick access door is shown, the coal dry separation system of the full bag dedusting further comprises a fully-closed dust hood 11 and a quick access door 1101, the fully-closed dust hood 11 is buckled on the separation part, and the fully-closed separation is realized; the quick access door 1101 is arranged on the side face of the upper cover body of the sorting part, and the maintenance and inspection equipment is operated through the quick access door 1101 on a daily basis. A product chute 4 is arranged below the intelligent vibration main separation bed body, and the product chute 4 is divided into a clean coal discharging chute 22, a middlings discharging chute 23 and a gangue discharging chute 24 according to different types of received materials. Furthermore, four sides of the fully-closed dust hood 11 just correspond to four sides of the main selection bed 15, and two sides and the rear side of the fully-closed dust hood are connected with two sides and the rear side of the main selection bed 15 through dust filtering cloth 1102, so that no dust gas is emitted outside. The front of the fully-closed dust hood 11 is provided with a plurality of quick access doors 1101, the quick access doors 1101 can be opened to directly reach the bed surface of the main separation bed 15, the maintenance work can be conveniently carried out, in addition, the top of the fully-closed dust hood 11 is provided with a pipeline hole connected with the fully-bag dust collector 10, and gas mixed with dust can enter the fully-bag dust collector 10 through the pipeline hole to be filtered and circulated.
Furthermore, two sets of pipeline holes are arranged on the fully-closed dust collecting cover 11, the two sets of pipeline holes are respectively connected to the full-bag dust collector 10, and an independent dust collection power system is arranged in each pipeline hole and used for adjusting dust collection power of each pipeline hole of the independent dust collection power system according to dust concentration difference in the upper space of the intelligent vibration main separation bed.
As shown in fig. 9, an intelligent material transporting system is additionally installed on the basis of fig. 8, a belt weigher 91 is arranged below a belt conveyor 92 for conveying coal materials by power, and the belt weigher 91 is preferably an intelligent belt weigher with a wireless transmission function, and can transmit the real-time conveying amount of the coal materials to a central control platform of a central control room, so that the material data analysis and control of coal sorting are realized in real time on the central control platform of the central control room.
As shown in fig. 1, the dust from the sorting space of the intelligent vibration main sorting bed of the pipeline hole sequentially enters the full-bag dust collector 10 through the dust collector air inlet 9 via the dust collecting pipeline 12. As shown in fig. 10, in the structure in which the dust enters the full bag dust collector 10 through the dust collector air inlet 9, the dust collector air inlet 9 is provided with a dust buffering device, preferably a pillow-shaped body for the dust buffering device, and the dust enters the full bag dust collector 10 after being buffered in the pillow-shaped body. Therefore, the blocky particles contained in the dust from the sorting space of the intelligent vibration main sorting bed can be buffered and fall in the pillow-shaped body and are gathered in the pillow-shaped body, the side part of the pillow-shaped body is provided with a dust collector air inlet inspection blind plate 8-3, the dust collector air inlet inspection blind plate 8-3 is detachably arranged on the side surface of the pillow-shaped body, and the gathered blocky particles can be cleaned by detaching the dust collector air inlet inspection blind plate 8-3. As shown in fig. 11, the air inlet pipe of the dust removing system of the coal dry separation system with full bag dust removal includes a horizontal air inlet pipe 8-1 of the dust remover and a square air inlet connecting pipe 8-2 of the dust remover, the horizontal air inlet pipe 8-1 of the dust remover constitutes the main body of the pillow body, and the square air inlet connecting pipe 8-2 of the dust remover is connected between the horizontal air inlet pipe 8-1 of the dust remover and the full bag dust remover 10.
Fig. 12 is a schematic diagram of air blast separation of a coal dry separation system with full bag dedusting, in which an air blast passage is arranged below an intelligent vibration main separation bed, and an air path is preferably adjacent to a separated material discharge opening. Therefore, the field power layout is conveniently and reasonably arranged, and the utilization rate of the field space is improved. Furthermore, at least two wind sources are used in the invention, so that the wind supply condition of each wind path can be adjusted respectively, and further the wind supply according to requirements is realized. And according to the wind path that sets up as figure 12, its air inlet windage is very little, has promoted the efficiency with wind.
In summary, the above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (9)
1. A coal dry separation system for full cloth bag dust removal is characterized by comprising a raw coal feeding part, an air supply part, a separation part and a dust removal part, wherein the raw coal feeding part comprises a product conveyor, a buffer bin and an intelligent conveying device; the intelligent air-adjusting dust-removing system comprises a dust-removing pipeline, a full-bag dust remover and a full-bag induced draft fan, wherein a fully-closed dust hood arranged at the upper part of the sorting part conveys dust generated by the sorting part to an air inlet of the dust remover through the dust-removing pipeline.
2. The system for dry separation of coal by full bag dust removal according to claim 1, wherein the gas containing impurities or dust through the air inlet of the dust remover enters the full bag dust remover, and the full bag dust remover is connected with the air inlet pipeline of the left main fan and the air inlet pipeline of the right main fan.
3. The system for dry coal separation by full bag dust removal according to claim 2, wherein the full bag dust remover delivers the purified gas back to the left main blower via the left main blower inlet duct, and the full bag dust remover delivers the purified gas back to the right main blower via the right main blower inlet duct.
4. The coal dry separation system adopting full bag dust removal according to claim 3, wherein the dust removal part further comprises a full bag induced draft fan, the full bag induced draft fan is connected with an induced draft fan chimney and an induced draft pipeline, and atmospheric gas is introduced into the full bag induced draft fan through the induced draft fan chimney.
5. The system for dry separation of coal by full bag dust removal according to claim 2, wherein the air flow processed by the full bag induced draft fan is sent to the full bag dust remover through an induced draft pipeline for supplementing the air lost in the separation process.
6. The system for dry separation of coal by full bag dust removal according to claim 5, wherein all the circulation air paths pass through the bag dust remover.
7. The coal dry separation system with full bag dust removal according to claim 1, wherein the coal dry separation system with full bag dust removal further comprises a fully-closed dust hood, and the fully-closed dust hood is buckled on the separation part to realize fully-closed separation.
8. The system for dry coal separation with full bag dust removal according to claim 7, wherein the system for dry coal separation with full bag dust removal further comprises a plurality of quick access doors arranged right in front of the fully-enclosed dust hood.
9. The system for dry separation of coal by full bag dust removal according to claim 1, wherein two sets of pipe holes are provided on the fully enclosed dust collecting hood, the two sets of pipe holes are respectively connected to the full bag dust remover, and an individual dust collection power system is provided in each pipe hole for adjusting the dust collection power of each pipe hole provided with the individual dust collection power system according to the dust concentration difference in the upper space of the vibratory separation bed.
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| CN202110354702.XA CN112958263A (en) | 2021-03-31 | 2021-03-31 | Coal dry separation system for full cloth bag dust removal |
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| CN202110354702.XA CN112958263A (en) | 2021-03-31 | 2021-03-31 | Coal dry separation system for full cloth bag dust removal |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113909116A (en) * | 2021-11-04 | 2022-01-11 | 唐山神州机械集团有限公司 | A cluster type wind purification system for mobile intelligent dry coal preparation system |
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