CN115090533B - Mobile skid-mounted intelligent dry coal dressing process and system - Google Patents
Mobile skid-mounted intelligent dry coal dressing process and system Download PDFInfo
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B15/00—Combinations of apparatus for separating solids from solids by dry methods applicable to bulk material, e.g. loose articles fit to be handled like bulk material
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C21/00—Disintegrating plant with or without drying of the material
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C23/00—Auxiliary methods or auxiliary devices or accessories specially adapted for crushing or disintegrating not provided for in preceding groups or not specially adapted to apparatus covered by a single preceding group
- B02C23/08—Separating or sorting of material, associated with crushing or disintegrating
- B02C23/14—Separating or sorting of material, associated with crushing or disintegrating with more than one separator
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- Engineering & Computer Science (AREA)
- Food Science & Technology (AREA)
- Combined Means For Separation Of Solids (AREA)
Abstract
The invention provides a mobile skid-mounted intelligent dry coal preparation process and a system, wherein the process comprises a primary crushing step and a secondary crushing step, and lump coal and mixed coal dust obtained after secondary crushing are separated, wherein raw coal with the particle size of 80-300 mm is separated by adopting an IDS X-ray intelligent lump coal separator, and raw coal with the particle size of 0-80mm is separated by adopting an assembled modularized separation unit. The mobile skid-mounted intelligent dry coal dressing process and system are particularly suitable for mining of strip mines, and are capable of simplifying process flow, reducing environmental pollution, improving transportation capacity, improving classification efficiency, reducing energy consumption, controlling classification granularity, improving drying and sorting effects, meeting feeding granularity of strip mines, grading high-efficiency materials, guaranteeing sorting efficiency and avoiding atmospheric pollution.
Description
Technical Field
The invention belongs to the field of dry separation of coal, in particular to a mobile skid-mounted intelligent dry separation process and system, and particularly relates to a full-size dry combined separation process and system based on low-quality coal.
Background
Coal is a solid combustible mineral that is gradually formed by ancient plants buried underground through complex biochemical and physicochemical changes. Coal is known as black gold and industrial food, is one of main energy sources used in human world in the eighteenth century, enters the twenty-first century, is a source of energy which is indispensable for the production and life of people in the present and future for a long time after all although the value of coal is far less than before, is also related to the stability of the development of the industry in China and the whole social aspect, and is the most important in the energy safety in China.
The coal separation mainly comprises two directions of water washing and dry separation, and the water washing basically adopts processes such as jigging, dense medium, floatation and the like, and has the advantages of mature process, high separation precision and large treatment capacity. The defects are that the construction investment is large, the period is long, the production cost is high, the larger water resource consumption and waste exist, and the water consumption for washing 1 ton of raw coal is about 0.1m 3 Low quality byproducts such as coal slime are also produced. Dry separation is a coal separation method which has been in existence and developed slowly for nearly twenty years, and has the advantages of no water consumption, simple process, low investment and low production cost, and the main representative process is a wind dry coal separation process. From the region of coal distribution, the western region is 80.4% nationwide, the middle region is 15.2% nationwide, and the eastern region is 4.4% nationwide. The western part is the main part of coal in China The distribution area is just the arid area with little water, so the dry separation has wider requirements and prospects compared with the water washing, and the dry separation is widely popularized in China and all over the world in a very short period. The moisture content of coal, as well as ash and sulfur content, are important factors affecting the quality of coal. In order to improve the quality of coal, it is necessary to dewater and sort the coal. With the development of coal upgrading technology, coal drying and dry separation processes are widely applied and have achieved significant success.
At present, domestic dry coal dressing equipment has single function and limited effective separation granularity, and only has a certain separation effect on full-size-fraction raw coal rough separation or on a specific-size-fraction raw coal. In addition, the traditional wind dry coal separation method (such as wind jigging, wind shaking table and the like) uses air as separation medium, the separation density and the medium density differ by more than 1000 times, the separation efficiency is low, and the applicability is poor; recently developed equipment for identifying different components in coal by means of photoelectric technology has high separation lower limit, and is mainly suitable for gangue removal of massive coal; the separation equipment of the vibration external force and the autogenous medium is mainly used for gangue discharge of medium and fine-grained coal, and the separation precision is relatively low; the heavy medium coal dressing equipment taking the magnetite powder and the pulverized coal as the mixed binary heavy matters can flexibly adjust the separation density, has high separation precision, and is difficult to effectively separate fine coal; the coal dressing equipment which depends on external force fields such as a magnetic field, an electric field, a vibration field and the like can realize effective separation of fine coal, but the treatment capacity is low, and the added value of products is small. In addition, due to the limitations of the dry coal separation equipment, under the separation process designed based on the equipment, the problems of few separation products, poor quality of clean coal, low medium utilization rate, no-degree discharge of dust, large influence of moisture on feeding and the like exist, so that the quality improvement degree and the efficient utilization of coal resource dry separation are limited.
Chinese patent application No. CN201811086591.3 discloses a dry coal separation system and process, which comprises a raw coal preparation and drying section, a separation section, and a medium purification circulation section; the medium purifying and circulating part adopted in the sorting part comprises a medium removing sieve I, a medium removing sieve II, a flow divider I, a flow divider II, a circulating medium bin, a medium feeder I, a flow dividing medium buffer bin, a medium feeder II, a medium magnetic separator, a magnetic concentrate flow divider, a magnetic concentrate bin, a medium feeder III, a circulating medium buffer bin, a medium feeder IV, a magnetic concentrate buffer bin, a magnetic concentrate feeder, a medium removing sieve III, a medium removing sieve IV and other components, and adopts a dry heavy medium fluidized bed sorting machine and a pulsation/vibration heavy medium fluidized bed sorting machine which are connected with a dust discharge port. The method has the problems of non-fine coverage of sorting grain, numerous components, non-uniform coordination, high failure rate and the like.
In addition, raw coal is inevitably mixed into gangue, clods and other impurities affecting coal quality in the mining process, and poor-quality coal such as gangue layer surface coal, broken belt and the like exists in the surface mine mining, and furthermore, the dilemma that a surface mine stope changes frequently and a permanent coal washery cannot be built exists in the surface mine mining.
Therefore, in order to be suitable for sorting various coals, especially mining of strip mines, deep dry sorting research on low-grade coals such as gangue layer surface coals, broken belts and the like must be enhanced, the grain grade sorting process is perfected, and the functional combination of equipment is optimized so as to realize high-efficiency dry sorting and clean utilization of coals.
Disclosure of Invention
Based on the problems in the prior art, the invention provides the mobile skid-mounted intelligent dry coal dressing process and system, which not only solve the technical problems in the prior art and improve the treatment capacity of coal dressing, but also realize the intelligent dressing of strip mines.
According to a first aspect of the technical scheme of the invention, a mobile skid-mounted intelligent dry coal dressing process is provided, which comprises the following steps:
step S1, a primary crushing step, namely, firstly crushing giant lump coal with the grain diameter of more than 1 meter, which is excavated from a pit, into lump coal with the grain diameter of less than 1 meter;
s2, a secondary crushing step, namely conveying the lump coal obtained after primary crushing to a designated site for secondary crushing, and obtaining lump coal with the particle size smaller than 300mm in the secondary crushing stage;
and S3, sorting the lump coal obtained after the secondary crushing and the mixed pulverized coal, wherein the raw coal with the particle size of 80-300 mm is sorted by adopting an IDS X-ray intelligent lump coal sorting machine, and the raw coal with the particle size of 0-80mm is sorted by adopting an assembled modularized sorting unit.
The classifying step includes the steps of:
conveying clean coal obtained by sorting raw coal by a skid-mounted dry separator to a clean coal bin for standby by a clean coal product belt conveyor with the diameter of 0mm to 80mm, and transferring the obtained gangue product to the gangue sorting belt conveyor with the diameter of 0mm to 80mm by the gangue belt conveyor with the diameter of 0mm to 80mm after medium removal treatment; preferably, the gangue products are backfilled into the pit via a 0mm-80mm sorted gangue belt conveyor;
according to a second aspect of the technical scheme of the invention, a mobile skid-mounted intelligent dry coal separation system is provided, which comprises a modular separation module and an intelligent control system, and is matched with the modular separation module and the intelligent control system for realizing serialization separation combination matching of raw coal. The modularized separation module specifically comprises a transportation module, a crushing module, a separation module, a purification module and an air supply module, wherein the transportation module, the crushing module, the separation module, the purification module and the air supply module all adopt closed independent operation.
The whole mobile skid-mounted intelligent dry coal separation system adopts skid-mounted design, and a conveying module, a crushing module, a sorting module, a purifying module and an air supply module which form the mobile skid-mounted intelligent dry coal separation system are independently conveyed to the site, so that the modules of the conveying module, the crushing module, the sorting module, the purifying module and the air supply module are connected on the site to be put into operation; and the movable skid-mounted intelligent dry coal dressing system is fixedly mounted by using a full steel structure module without using concrete in the mounting process.
The mobile skid-mounted intelligent dry coal preparation system comprises a raw coal crushing scraper conveyor, a belt conveyor, a classifying screen, a fine coal belt conveyor, a skid-mounted dry separator, a fine coal scraper conveyor, a fine gangue scraper conveyor, a blower, a bag dust collector, a draught fan, a lump coal belt conveyor, an IDS dry separator, a lump coal belt conveyor and a lump coal belt conveyor, wherein the raw coal crushing scraper conveyor crushes raw coal and conveys crushed raw coal to the belt conveyor in a scraper conveying mode, crushed coal lumps are conveyed to the classifying screen through the belt conveyor, the classifying screen is arranged in a raw coal screening workshop, and the classifying screen is used for screening raw coal, and divides the raw coal into two parts of which the particle size is larger than 80mm and the particle size is smaller than or equal to 80 mm; the full-sealed purifying and dedusting system is arranged on the raw coal screening workshop and is used for dedusting the raw coal screening workshop.
The rear end of the classifying screen is provided with a powder coal belt conveyor and a lump coal belt conveyor, the powder coal belt conveyor is used for conveying raw coal from the classifying screen to a skid-mounted dry separator, the lump coal belt conveyor is used for conveying lump coal obtained by screening through the classifying screen to an IDS dry separator, and the IDS dry separator is used for separating lump coal with the particle size of 80-300 mm.
Further, the IDS dry separator is an IDS X-ray intelligent lump coal separator, lump clean coal separated by the IDS dry separator is conveyed to a lump clean coal storage and transportation through a lump clean coal belt conveyor, and gangue separated by the IDS dry separator is conveyed to a gangue storage and transportation through a lump gangue belt conveyor or is directly backfilled into a pit of an open pit.
Further, the skid-mounted dry separator is used for separating raw coal with the particle size of 0-80mm, the separated clean coal with the particle size of 0-80mm is sent to a clean coal bin to be transported through a dust clean coal scraper conveyor, the separated gangue is sent to a gangue bin to be transported through a dust gangue scraper conveyor, and the gangue is backfilled to an open pit or used for building materials after being transported.
The mobile skid-mounted intelligent dry coal dressing process and system are particularly suitable for mining of strip mines, simplify the process flow, reduce environmental pollution, improve transportation capacity, improve classification efficiency, reduce energy consumption, control classification granularity, improve drying and have good separation effect, meet the feeding granularity of the strip mines, classify high-efficiency materials, ensure separation efficiency and avoid atmospheric pollution. Further realizing intelligent on-site adjustment and improving the sorting effect of coal. Furthermore, the method has irreplaceable effects in aspects of waste coal recovery or wind oxidation coal separation, lignite quality improvement and efficiency improvement, resource utilization rate improvement, energy conservation and emission reduction, solid waste environmental pollution reduction and the like.
Drawings
FIG. 1 is a schematic flow chart of a mobile skid-mounted intelligent dry coal dressing process according to the invention;
FIG. 2 is a schematic diagram of a mobile skid-mounted intelligent dry coal dressing system according to the present invention;
FIG. 3 is a schematic diagram of the dual wing intelligent crush type breakage system of FIG. 2;
FIG. 4 is a schematic diagram of a double wing structure of the double wing intelligent rolling type breakage system in FIG. 3;
FIG. 5 is a schematic view of the roller compaction conveyor mechanism of FIG. 3;
FIG. 6 is a schematic diagram of a clustered wind power purification system;
FIG. 7 is a schematic diagram of a distributed complementary air supply system.
The component names indicated by reference numerals in the drawings are as follows:
1. raw coal crushing scraper conveyor; 2. a belt conveyor; 3. classifying screen; 4. a pulverized coal belt conveyor; 5. skid-mounted dry separator; 6. a clean coal scraper conveyor; 7. a scraper conveyor for the tail coal; 8. a waste rock scraper conveyor; 9. a blower; 10. a bag-type dust collector; 11. an induced draft fan; 12. lump coal belt conveyor; 13. IDS dry separator; 14. a lump clean coal belt conveyor; 15. a block gangue belt conveyor; 21. a driving motor; 22. a speed reducer; 23. a head wheel; 24. a scraper; 25. a scraper chain; 26. a crushing motor; 27. a V-belt; 28. a wing plate; 29. a tail wheel; 30. a guard board; 2601. a rolling device; 31. a lower tank; 32 upper tank; 33. a hydraulic prop; 41. a skid-mounted base; 42. an access door; 43. a purification chamber; 44. a purification chamber wall plate; 51. an air outlet; 52. an air inlet; 53. an access opening; 54. and an air valve.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all, of the embodiments of the present invention. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the inventor, are within the scope of the invention.
The invention provides a mobile skid-mounted intelligent dry coal dressing process and system, which are suitable for sorting of full-size raw coal of strip mines. The "full size raw coal" sorting of the present invention is substantially enhanced and very different from the "full size" sorting previously used by the applicant. In the prior art, the technology of the 'full-size raw coal' sorting of the invention has never been presented. The applicant has previously used full size fraction separation to refer to and effect dry separation of 0mm to 80mm low quality coal; the full-size-fraction raw coal sorting refers to sorting of all-system autogenous raw coal, and comprises sorting of raw coal with all sizes; the method comprises the steps of firstly crushing giant lump coal with the grain size of more than 10 meters excavated from a pit into lump coal with the grain size of less than 10 meters, then entering a secondary crushing step of the invention, and obtaining lump coal with the grain size of less than 300mm in the secondary crushing step.
The invention provides a mobile skid-mounted intelligent dry coal dressing system, which comprises a modular sorting module and an intelligent control system, wherein the modular sorting module is matched with the intelligent control system, and the serial sorting combination design is realized for raw coal; the modularized sorting module specifically comprises main modules such as a conveying module, a crushing module, a sorting module, a purifying module, an air supply module and the like, and all the main modules adopt closed operation. The whole mobile skid-mounted intelligent dry coal dressing system adopts skid-mounted design, and all main modules forming the mobile skid-mounted intelligent dry coal dressing system are independently transported to the site, so that all modules can be connected on the site to be put into operation. The movable skid-mounted intelligent dry coal dressing system does not use concrete in the installation process, and the movable skid-mounted intelligent dry coal dressing system can be rapidly put into use all the year round due to a complete steel structure module.
The sorting host of the sorting module in the mobile skid-mounted intelligent dry coal sorting system adopts a super dry separator (large-treatment-capacity dry separator) of the applicant, the treatment capacity per unit area is increased by 40%, the main sorting system saves energy by 30%, and the national requirements of energy conservation and emission reduction are realized. The purifying module adopts a full cloth bag dust removing system to realize cleaning and winnowing; the main fan circulating air of the purification module is air filtered and purified by a cloth bag, and an air quantity distribution regulation device is arranged in a negative pressure system of the induced draft fan and a working system of the main fan; the main fan circulating air keeps the feeding loose, the induced draft fan keeps the negative pressure operation of the sorting main machine, the dust-containing air flow is filtered through the cloth bag, and the emission concentration is far lower than the dust emission standard required by the state.
The raw coal preparation and each transfer point are provided with closed dust collection points, so that dust can be jointly treated by bag dust collection and spray dust fall, and the fly of the coal dust is avoided. If the top of the coal receiving processor is sealed, wet spraying is adopted for dust fall in summer. And dry cloth bags are adopted for dust removal in winter, so that the environment protection of the coal preparation system is ensured to reach the standard. The special dust remover is matched with the sieving machine to solve the problem of sieving dust. The fine powder collected by the dust remover adopts a humidifying and stirring process, and the pulverized coal is mixed into the refined coal product according to the heating value. The movable skid-mounted intelligent dry coal preparation system can be provided with a pre-separation powder removal system and a post-separation deep powder removal system according to the coal quality condition. When the sand or coal powder content is large, the dust amount can be greatly reduced by selecting the front dust removal, and the operation environment is improved. When the coal quality is better, raw coal can be separated without powder removal, and the recovery rate of clean coal is improved. The process flow is flexible and flexible, and full-stage selection or partial selection can be realized according to coal quality adjustment.
The mobile skid-mounted intelligent dry coal dressing system adopts the collocation of an intelligent control system, and all the intelligent dry coal dressing systems adopt digital management to share information with a central of a coal mine dispatching room and are linked online; in the intelligent control adopted by the mobile skid-mounted intelligent dry coal dressing system, each module is provided with a multiple measurement and control device and data analysis software, so that an operator is not required, and the 'black lamp factory' design is realized.
In addition, the mobile skid-mounted intelligent dry coal preparation system comprises a double-wing turnover raw coal receiving system, an IDS X-ray lump coal dry separator, a large-throughput dry separator, a purifying and dedusting system (a purifying system or a purifying circulating system) and a belt comprehensive protection system in a conveying module.
The double-wing turnover raw coal receiving system automatically adjusts the scraper speed according to the feeding amount and the bearing force of subsequent equipment, and keeps the optimal feeding amount state of the system under the conditions of keeping the sorting effect and allowing the loading rate of the subsequent equipment; when oversized materials and overlong materials exist, an audible and visual alarm is realized, and the mechanical arm is matched for self cleaning; the load of the unloading vehicle and the load of the scraper crusher are detected, and the side turning device is automatically started, stopped and turned on. And (5) alarming and stopping overload and other faults.
The IDS X-ray lump coal dry separator automatically measures and displays the quantity of each product of the raw coal classifying screen, and is beneficial to the adjustment of the feeding quantity of each classifying equipment to the nearest feeding quantity range of all parallel single machines. The IDS separator can be installed with an online ash measuring system on the incoming material and gangue belt at the same time, and the abnormal condition of gangue carrying coal and the separation parameters can be automatically adjusted in time.
The large-treatment-capacity dry separator detects and displays the feeding, clean coal and gangue amount and monitors the load rate of equipment. And (5) carrying out on-line detection on the ash content of raw coal and clean coal. And realizing the automatic adjustment of the operation parameters of the dry separator according to the ash content change of raw coal and clean coal. The adjustment parameters comprise feeding amount, air distribution amount, bed surface angle, medium coal amount control turning plate and the like.
The purifying and dedusting system adopts a full cloth bag for dedusting, and clean air and coal are selected; and an automatic air quantity distribution regulation device is arranged in the negative pressure induced air system and the circulating air working system. The dust concentration and the inlet and outlet pressure difference of the dust collector are automatically detected by the purification dust collection system, and the automatic back blowing and vibrating of each air chamber are realized according to the resistance change, so that the best working state of the dust collector is maintained. The coal dust after dust removal is firstly humidified and stirred to measure the water content of the coal dust and control the water spraying amount. The raw coal preparation and discharging points are provided with closed dust collection points, so that dust concentration detection and linkage control of a spraying device are realized, the spraying device is started when flying dust reaches a certain value, and the water quantity can be controlled.
The comprehensive belt protection system in the conveying module automatically measures the feeding quantity of the belt, keeps stable feeding through variable frequency speed regulation, detects the deviation, tearing and the like of the belt, alarms, controls and protects the belt.
Further, as shown in fig. 1, the mobile skid-mounted intelligent dry coal dressing process of the invention comprises the following steps:
step S1, a primary crushing step, namely, firstly crushing giant lump coal with the grain diameter of more than 10 meters excavated from a pit into lump coal with the grain diameter of less than 10 meters;
S2, a secondary crushing step, namely conveying the lump coal obtained after primary crushing to a designated site for secondary crushing, and obtaining lump coal with the particle size smaller than 300mm in the secondary crushing stage;
and S3, sorting the lump coal obtained after the secondary crushing and the mixed pulverized coal, wherein the raw coal with the particle size of 80-300 mm is sorted by an IDS X-ray intelligent lump coal sorter ("IDS" is the abbreviation of intelligent dry sorting), and the raw coal with the particle size of 0-80mm is sorted by an assembled modularized sorting unit.
In the step S3, raw coal with the particle size of 0-80mm is separated by adopting an assembled modularized separation unit.
The invention relates to a grading fine separation method in a mobile skid-mounted intelligent dry coal dressing process, which comprises the following steps of:
raw coal is conveyed to a screening workshop through a raw coal belt conveyor with the thickness of 0mm-80mm, and is separated by adopting a C-ZM dry separator (the C-ZM is abbreviated as a super intelligent dry separator, and the super intelligent dry separator is a dry separator with large treatment capacity and intelligent control).
Transferring and drying, namely conveying the cleaned coal obtained by separation by a C-ZM dry separator to a cleaned coal bin for standby by a cleaned coal product belt conveyor with the diameter of 0mm to 80mm, and transferring the obtained gangue product to a gangue separation belt conveyor with the diameter of 0mm to 80mm after medium removal treatment; backfilling gangue products into the pit by a gangue sorting belt conveyor with a diameter of 0mm-80 mm;
As shown in fig. 2, the device specifically comprises a raw coal crushing scraper conveyor 1, a belt conveyor 2, a classifying screen 3, a last coal belt conveyor 4, a skid-mounted dry separator 5, a last clean coal scraper conveyor 6, a last middling scraper conveyor 7, a last gangue scraper conveyor 8, a blower 9, a bag dust collector 10, a draught fan 11, a lump coal belt conveyor 12, an IDS dry separator 13, a lump clean coal belt conveyor 14 and a lump gangue belt conveyor 15.
The raw coal crushing scraper conveyor 1 crushes raw coal and conveys crushed raw coal to the belt conveyor 2 in a scraper conveying mode, crushed coal blocks after crushing are conveyed to the classifying screen 3 through the belt conveyor 2, the classifying screen 3 is arranged in a raw coal screening workshop, the classifying screen 3 is used for screening raw coal, and the raw coal is divided into two parts of raw coal with the particle size of more than 6mm and the particle size of less than or equal to 6 mm; the full-sealed purifying and dedusting system is arranged on the raw coal screening workshop and is used for dedusting the raw coal screening workshop.
Further, a last coal belt conveyor 4 and a lump coal belt conveyor 12 are arranged at the rear end of the classifying screen 3, the last coal belt conveyor 4 is used for conveying raw coal from the classifying screen 3 to the skid-mounted dry separator 5, the lump coal belt conveyor 12 is used for conveying lump coal obtained by screening through the classifying screen 3 to the IDS dry separator 13, and the IDS dry separator 13 is used for sorting lump coal with the particle size of 80-300 mm. Preferably, the IDS dry separator 13 is an IDS X-ray intelligent lump coal separator, lump clean coal separated by the IDS dry separator 13 is conveyed to a lump clean coal storage and transportation via a lump clean coal belt conveyor 14, and gangue separated by the IDS dry separator 13 is conveyed to a gangue storage and transportation via a lump gangue belt conveyor 15 or directly backfilled into a pit of an open pit. The skid-mounted dry separator 5 is used for separating raw coal with the grain size of 0-80mm, the separated clean coal with the grain size of 0-80mm is sent to a clean coal bin to be transported through the fine clean coal scraper conveyor 6, the separated gangue is sent to a gangue bin to be transported through the fine gangue scraper conveyor 8, and the gangue is backfilled to an open pit or used for building materials after being transported; the separated middlings are sent to a middling bunker through a terminal middling scraper conveyor 7, and are transferred through the middling bunker and then enter secondary separation. Furthermore, a fully-sealed purifying and dedusting system is arranged on the skid-mounted dry separator 5, so that the whole system is free from leaked pollutants, the purifying and dedusting system is used for dedusting through a cloth bag dust collector 10, a blower 9 is used for blowing dust-containing gas from the skid-mounted dry separator 5 into the cloth bag dust collector 10, and clean gas filtered by the cloth bag dust collector 10 is returned to the skid-mounted dry separator 5 through a draught fan 11 for use.
The intelligent rolling type breakage system with double wings as shown in fig. 3 comprises a feeding device with double wings, a scraping plate type forced feeding mechanism, a rolling type crushing mechanism and an intelligent material amount detection mechanism, wherein the feeding device with double wings is used for dumping materials placed on the double wings onto a conveying belt of the scraping plate type forced feeding mechanism, the scraping plate type forced feeding mechanism is used for applying parallel driving force to the materials from the feeding device with double wings, the materials are fed into the rolling type crushing mechanism and crushed, and the intelligent material amount detection mechanism is used for detecting the amount of the materials fed into the feeding device with double wings in unit time.
Further, as can be seen from the double-wing structure schematic diagram of the double-wing intelligent rolling type breakage system shown in fig. 4, the feeding device of the double-wing structure comprises wing plates 28 symmetrically arranged left and right, a hydraulic prop 33 is arranged under the wing plates 28, one end of the hydraulic prop 33 is connected to the middle upper portion of the wing plates 28, the other end of the hydraulic prop 33 is connected between the lower tank 31 and the upper tank 32, and the wing plates 28 are lifted or opened and closed by the expansion and contraction of the hydraulic prop 33. As also shown in fig. 5, a scraper chain 25 is arranged at the upper part of the upper tank 32, and the materials poured by the wing plates 28 are directly poured onto the scraper chain 25 and conveyed to the rolling crushing mechanism through the scraper chain 25. The structure shown in fig. 4 is obtained from the view shown in fig. 3"A-A", and the structure shown in fig. 5 is obtained from the view shown in fig. 3B-B ".
Preferably, a support plate is provided between the lower tank 31 and the upper tank 32, the outer side wall of the lower tank 31 is connected to the outer side wall of the upper tank 32 by the support plate, and the wing plate 28 is pivotally connected to the upper end of the support plate, that is, the wing plate 28 is pivoted to rotate about the upper end point of the support plate. More preferably, an intelligent material amount detecting mechanism is arranged on the side surface of the wing plate 28, and the intelligent material amount detecting mechanism is used for detecting the material amount fed in a unit time of the feeding device with the double-wing structure or measuring the material amount fed in any operation time. Furthermore, the intelligent material quantity detector adopts an infrared metering detection device, infrared measuring columns are arranged on two sides of a wing plate on the material inlet side in pairs, optical data such as the speed of feeding materials and the material section are detected through the infrared measuring columns, and preferably, the data obtained by the infrared measuring columns are transmitted to a central control platform in a wireless or wired mode for monitoring and processing. The intelligent material quantity detector can also detect whether materials are piled up or whether the processing quantity of the scraping plate type forced material conveying mechanism is not adapted.
The scraper type forced feeding mechanism of the double-wing intelligent rolling type breakage system shown in fig. 3 comprises a driving motor 21, a speed reducer 22, a head wheel 23, a scraper 24, a scraper chain 25 and a tail wheel 29, wherein the driving motor 21 adopts a high-power alternating current motor, the driving motor 21 is used for driving the speed reducer 22 to drive the head wheel 23 to rotate, the output power of the driving motor is transmitted to the head wheel 23 through the speed reducer 22, and the head wheel 23 is used for driving the scraper chain 25, so that the scraper chain 25 moves in a conveying trough of a main body of the rolling type breakage system, and further, the material is driven to move forwards. The head wheel 23, the scraping plate 24, the scraping plate chain 25 and the tail wheel 29 are arranged on a straight line, namely, the head wheel 23, the scraping plate 24, the scraping plate chain 25 and the tail wheel 29 are arranged along the material conveying direction, the advancing direction of materials is coordinated and adjusted through the head wheel 23 and the tail wheel 29, the scraping plate chain 25 is connected between the head wheel 23 and the tail wheel 29, the scraping plate chain 25 is driven to rotate through the rotation of the head wheel 23, the scraping plate 24 is arranged on the scraping plate chain 25, and the scraping plate 24 drives the materials to advance in a conveying mode.
Further, a blocking detector is arranged in the conveying trough of the rolling type damage system main body and is used for monitoring whether the conveying trough of the scraper conveyor main body is blocked or not. The scraper chain 25 is used for connecting a scraper which is vertically arranged with the conveying trough of the rolling type damage system main body, and the scraper is driven by the scraper chain 25 to push materials to move forward. Meanwhile, a broken chain indicator is arranged in the conveying trough of the rolling type damage system main body and is used for monitoring whether the scraper chain is broken or not. The main body conveying trough of the rolling type damage system, namely the box body is used for bearing the scraping plate 24, the scraping plate chain 25 and materials. Further, a tail wheel 29 is arranged at the end of the conveying trough of the rolling type damage system main body, the scraper chain is wound on the tail wheel 29, and the tail wheel 29 is used for changing the direction of the scraper chain.
In another embodiment, a rolling type crushing mechanism is arranged in the material conveying advancing direction, the rolling type crushing mechanism comprises a rolling device 2601, a triangular belt 27, a crushing motor 26 and a guard plate 30, power output by the crushing motor 26 is transmitted to the rolling device 2601 through the triangular belt 27, the rolling device 2601 rolls and crushes large coal blocks, and a unidirectional guard plate 30 is arranged at the front end of the rolling device 2601, so that the large coal blocks entering the rolling device can only advance along the material conveying. The guard plate 30 has two functions, namely, preventing the crushed coal blocks which are disintegrated in the rolling and crushing process from escaping from the rolling device, and preventing the large coal blocks which enter the rolling process from backing. Further, a tensioning mechanism is provided at the tail wheel 29 for moderately adjusting the degree of tensioning of the scraper chain 25.
The movable skid-mounted intelligent dry coal separation system adopts the clustered wind power purification system shown in fig. 6, and the clustered wind power purification system is used as a combined module in the movable skid-mounted intelligent dry coal separation system and can be arranged at any separation stage or any separation stage. The cluster type wind power purification system comprises a skid-mounted base 41, a purification cavity 43 and a purification cavity wall plate 44, wherein the skid-mounted base 41 is used for towing type installation of the wind power purification system and is installed at the bottom of the wind power purification system, and the wind power purification system can be integrally moved. According to production requirements, the clustered wind power purification system can be dragged to a designated production place, and then the clustered wind power purification system is fixed at the designated production place by using a fixing mechanism; after completing the staged production tasks, the clustered wind power purification system may be towed to the next production site. The wind power purification system in the cluster type wind power purification system is used for enabling dust-containing gas generated at the upper-stage separation end to enter from an inlet of the wind power purification system, and clean gas after dust removal is discharged from an air outlet of the wind power purification system. The wind power purification system mainly comprises a purification cavity 43, a cloth bag dust collector 10 and a purification cavity wall plate 44, dust-containing gas flows through the inner cylinder of the cloth bag dust collector 10, clean gas permeates through the cloth bag dust collector through the dust removing function of the cloth bag dust collector 10, namely clean gas permeates into the outer cylinder of the cloth bag dust collector from the inner cylinder of the cloth bag dust collector to enter the purification cavity 43, and clean gas is discharged through the air outlet through the purification cavity 43. Preferably, a purge chamber wall plate 44 is provided around the purge chamber 43, and the purge chamber wall plate 44 is used to set the flow range of the purge gas.
Furthermore, compared with the prior art, the mobile skid-mounted intelligent dry coal preparation system adopts a large-capacity purifying and dust removing system, and the existing small-capacity cloth bag purifying and dust removing system cannot be suitable for the requirement of large-throughput sorting of the mobile skid-mounted intelligent dry coal preparation system, so that the mobile skid-mounted intelligent dry coal preparation system adopts a cluster type wind power purifying system, and the cluster type wind power purifying system is characterized in that a plurality of dust removing chambers are adopted, a purifying chamber wall plate is used for dividing the dust removing chambers, a purifying chamber surrounded by the purifying chamber wall plate is formed, and a large-capacity cloth bag dust remover is hung in the purifying chamber. Preferably, the concentration of the plurality of cloth bag dust collectors is conducted to one or more air inlets through a concentration pipeline, and the number of the air inlets is specifically selected according to the strength of on-site air flow and the flow of the air flow, in particular, the flow rate of treated air, the filtering wind speed, the dust collection efficiency, the concentration of inlet dust, the discharge concentration, the specification number of filter bags, the specification number of dust collection frameworks, the specification number of electromagnetic pulse valves, the pressure loss, the air leakage rate, the steel consumption, the specification type of an induced draft fan, the length, the width, the height and the like of the dust collectors. Further, the bag-type dust collector generally has a length of 4-15 m and a diameter of 15-50 cm, and has high transmittance. The bag-type dust collector provided by the invention is selected from the bag-type dust collectors without keels and dust removing frameworks, so that the filtering and the use of the atmospheric air flow are facilitated. Preferably an antistatic fiber dust collection cloth bag with the length of 6 meters and the diameter of 20 cm.
Still further, an access door 42 is provided on the side of the clustered wind power purification system, the access door 42 is used for daily maintenance or emergency treatment of faults, and preferably the number of access doors is set according to the overall capacity of the clustered wind power purification system, and the access door is generally arranged outside the wind power purification system and near the skid-mounted base, so that access personnel can conveniently enter or exit.
The mobile skid-mounted intelligent dry coal dressing system adopts a distributed complementary air supply system shown in figure 7; the distributed complementary air supply system adopts a three-dimensional cross air inlet structure and comprises a first air supply body shown in the upper half part of fig. 7 and a second air supply body shown in the lower half part of fig. 7, wherein the first air supply body and the second air supply body are arranged in a cross staggered mode, the first air supply body comprises an air inlet 52 and two air outlets 51 which are arranged in parallel, the number of the first air outlets of the first air supply body is not equal to that of the second air outlets, and as shown in fig. 7, the number of the first air outlets is 3, and the number of the second air outlets is 4. The second air supply body includes one air inlet 52 and two parallel exhaust outlets 51, and the number of first exhaust outlets of the second air supply body is equal to the number of second exhaust outlets, as shown in fig. 7, the number of first exhaust outlets is 5, and the number of second exhaust outlets is 5.
Preferably, an air valve 54 is provided at the air outlet 51, and the air speed and flow rate are controlled by the air valve 54; an access opening 53 is arranged at the tail end of the air supply body, namely at the end corresponding to the air inlet, and is used for daily maintenance of the distributed complementary air supply system and cleaning of sediment and the like in the air duct.
The distributed complementary air supply system designed as shown in fig. 7 corresponds to the large-treatment coal sorting application of the mobile skid-mounted intelligent dry coal sorting system, dense air outlets are arranged at the places where the coal bed is thick or where the lump coal amount is large, and fewer air outlets are arranged at the places where the coal bed is thin or where the coal amount is large, so that the air supply quantity is suitable for forming uniform sorting wind force on a vibration dry coal sorting bed, and further a suspended uniform vibration sorting mixed flow layer is formed. Further, a third air supply body is provided according to the actual production requirement, as shown in fig. 7, and is provided at the lower part of the first air supply body and at the right part of the second air supply body. In actual production, according to the thickness of the coal seam, different strength air supplies are applied through each air supply body, so that the air supply according to the needs is realized, and the technical effects of sorting according to the needs are achieved. Furthermore, a wind power detector is arranged on each air inlet duct and used for detecting the air quantity and the air speed, the detected data are transmitted to a central controller of the distributed complementary air supply system, the actual air supply quantity is calculated through the central controller, and an air valve arranged at an air outlet is adjusted according to signals fed back according to the needs of coal seam sorting, so that air supply is needed.
Furthermore, the redundant design among the components of the mobile skid-mounted intelligent dry coal separation system and the working coordination among the sorting, screening and transportation among the components are integrated.
Compared with the prior art, the mobile skid-mounted intelligent dry coal dressing process and system have the following technical advantages:
1.1 production Capacity serialization and production Process diversification
The movable skid-mounted intelligent dry coal dressing process and system are provided with screening, crushing, dedusting and other processes according to local conditions, so that higher coal dressing efficiency and lower capital investment and production cost are ensured. Meanwhile, according to the characteristics of the strip mine and the capability requirements of coal preparation plants, the technical scheme of skid-mounted dry coal preparation systems with various plant scales of 100-600 t/h is developed through design; according to the characteristics of low-rank coal, fragile, easily weathered and easily sliming of the majority of the product sales market and Chinese dynamic coal, various process schemes of raw coal powder removal, 300-0mm full-size dry separation combined with intelligent separation of lump coal X-rays and the like are designed and developed.
1.2 simple and flexible Process System
The mobile skid-mounted intelligent dry coal dressing process and system adopts a large-sized, efficient and reliable dry separator with large treatment capacity, good separation performance and large single machine treatment capacity. Because the number of the mobile skid-mounted intelligent dry coal dressing process and the equipment of the system is reduced, the production process system is simplified, and the production cost is reduced. Preferably, based on the market and the requirements of users, the mobile skid-mounted intelligent dry coal dressing process and system can be provided with a direct bypass system and an online ash detection system, and the product structure can be adjusted at any time to meet the different requirements of different users. Raw coal can be completely washed, and can be partially washed, so that the production system has great flexibility.
1.3 short construction period and fast construction speed
In the mobile skid-mounted intelligent dry coal preparation process and system, all building structures, workshops, trestle bridges to storage facilities and even auxiliary facilities in a main machine, auxiliary equipment, nonstandard parts and ground production system are all from factory manufacturing or field manufacturing of the applicant. Because the mobile skid-mounted intelligent dry coal dressing process and system all adopt steel structure combined type module arrangement, the mobile skid-mounted intelligent dry coal dressing process and system are convenient to detach and carry, each module is provided with external maintenance, and the mobile skid-mounted intelligent dry coal dressing process and system are windproof, rainproof, heat-insulating and long in service life. The above-ground building structures are all manufactured on site, the construction site only needs to be assembled, and the modular steel structure integrates equipment, nonstandard civil engineering structures and the like, so that the civil engineering quantity is greatly reduced. The industrial manufacturing precision is high, the product quality is guaranteed, the engineering quality is guaranteed, the site construction efficiency is improved, and the comprehensive construction period is short. Generally, the building can be built about 1-2 months, and the current year of construction and current year of production can be realized.
1.4 factory building is small in size and small in occupied area
The mobile skid-mounted intelligent dry coal preparation process and system utilize gravity self-flow conveying of materials, the number of conveying equipment is small, the height difference between the equipment is small after the module arrangement is adopted, and the arrangement is very compact, so that the height of a production factory building is low, a connecting trestle is short, the occupied area is small, the building volume is small, and the modularized volume is only about 1/3 of that of a domestic traditional factory building (reinforced concrete structure) on the same scale, thereby reducing the occupied area and saving the capital investment. In addition, the method can realize staged construction and rolling development according to the pit capacity of the strip mine and the fund condition of users.
1.5 high automation level, high production efficiency and low processing cost
The mobile skid-mounted intelligent dry coal dressing process and system are provided with advanced large dry separation equipment, an advanced reasonable, practical and reliable control technology is adopted, the degree of automation is high, a centralized control system taking a PLC as a control host is provided, unmanned inspection is realized, and the time for starting and stopping is greatly shortened. Reduces labor staffs in the whole factory, improves production efficiency, and really plays a role in reducing staffs and improving efficiency. 1. The novel efficient coal preparation plant main factory work personnel of 600t/h (3.0 Mt/a) only need 3-5 people per shift, and the production efficiency is greatly improved.
In addition, because the building volume is reduced, the equipment is compact, the transportation distance is short, the electricity consumption and the material consumption can be reduced, and the processing cost is low. According to statistics, the electricity consumption is 0.5-0.7 times of that of the traditional coal preparation plant, and the processing cost is only about 1/2 of that of the traditional coal preparation plant. Meanwhile, under the condition that the plant type and the equipment level are the same, the skid-mounted design is adopted to save the total investment by more than 30% compared with the conventional dry separation plant design.
1.6, the movable layout is reasonable, and the device is suitable for discharging gangue under open pit
The movable skid-mounted intelligent dry coal preparation system is convenient to move and disassemble and assemble, and can be moved along with a coal cutter on an open pit mining working face regularly. Can realize the on-site gangue discharge of the open pit, and reduce the ineffective transportation of gangue. The quality of commodity coal is improved, meanwhile, inferior waste coal such as strip mine thin coal bed coal, gangue coal, top-bottom coal, wind oxidation coal and the like can be separated and recovered, the strip mine stripping ratio is reduced, and the coal mining efficiency is improved. The waste coal is recycled, so that coal resources are effectively utilized, and environmental pollution caused by spontaneous combustion of a dirty and miscellaneous coal yard is avoided.
1.7 strong adaptability
The mobile skid-mounted intelligent dry coal dressing system has the characteristics of serialized production capacity, diversified production processes, staged construction of the system and the like, so that the mobile skid-mounted intelligent dry coal dressing system has strong adaptability and can basically meet the use requirements of large, medium and small coal dressing plants of various types. The modularized design has replicability and universality, and is beneficial to saving the design period. The production capacity of a single system of 100-600 t/h (namely 0.60-3.60 Mt/a) is formed at present, and when a double system or a multi-system is adopted, the requirement of an oversized coal preparation plant with the hour capacity of more than 1200t/h can be met.
1.8 Social benefits
The main links of the mobile skid-mounted intelligent dry coal preparation system have the conditions for realizing the assembled building, a large amount of field work can be completed in a production workshop, and only the installation is needed on site, so that the purposes of reducing safety accidents and saving human resources are achieved. The whole system skid-mounted steel structure coal preparation plant is beneficial to accelerating construction progress and improving construction quality. The skid-mounted coal preparation system adopts the energy-saving super dry separator without water, has low power consumption, can save energy and reduce emission, can reduce the generation of construction waste, is beneficial to the national world and people, is green and environment-friendly, and is a construction mode advocated.
In summary, the above embodiments are only preferred embodiments of the present invention, and are not intended to limit the scope of the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (7)
1. The mobile skid-mounted intelligent dry coal dressing system is characterized by comprising a modularized separation module and an intelligent control system, wherein the modularized separation module and the intelligent control system are matched, and the modularized separation module and the intelligent control system are matched for realizing serialization separation combination of raw coal; the modularized separation module specifically comprises a transportation module, a crushing module, a separation module, a purification module and an air supply module, wherein the transportation module, the crushing module, the separation module, the purification module and the air supply module all operate independently in a closed mode;
the whole mobile skid-mounted intelligent dry coal separation system adopts a skid-mounted design, and a transportation module, a crushing module, a sorting module, a purifying module and an air supply module which form the mobile skid-mounted intelligent dry coal separation system are independently transported to the site, so that the transportation module, the crushing module, the sorting module, the purifying module and the air supply module can be connected on the site to be put into operation; the movable skid-mounted intelligent dry coal dressing system is fixedly mounted by using a full steel structure module without using concrete in the mounting process;
The mobile skid-mounted intelligent dry coal separation system comprises a skid-mounted dry separator (5), wherein the skid-mounted dry separator (5) is used for separating raw coal with the particle size of 0-80mm, separated clean coal with the particle size of 0-80mm is sent to a clean coal bin to be transported through a clean coal scraper conveyor (6), separated gangue is sent to a gangue bin to be transported through a clean gangue scraper conveyor (8), and the gangue is backfilled to an open pit or used for building materials after being transported;
the crushing module in the mobile skid-mounted intelligent dry coal preparation system adopts a double-wing intelligent rolling type breakage system, and comprises a feeding device with a double-wing structure, a scraping plate type forced feeding mechanism, a rolling type crushing mechanism and an intelligent material quantity detection mechanism, wherein the feeding device with the double-wing structure is used for dumping materials placed on the double-wing plate to a conveying belt of the scraping plate type forced feeding mechanism, the scraping plate type forced feeding mechanism is used for applying parallel driving force to the materials from the feeding device with the double-wing structure, feeding the materials into the rolling type crushing mechanism and carrying out crushing treatment, and the intelligent material quantity detection mechanism is used for detecting the quantity of the materials fed into the feeding device with the double-wing structure in unit time;
the feeding device of the double-wing structure comprises wing plates which are symmetrically arranged left and right, a supported hydraulic prop is arranged below the wing plates, one end of the hydraulic prop is connected to the upper middle part of the wing plates, the other end of the hydraulic prop is connected between a lower tank and an upper tank, the wing plates are lifted or opened and closed through the expansion and contraction of the hydraulic prop, a scraper chain is arranged on the upper part of the upper tank, and materials poured down from the wing plates are directly poured onto the scraper chain and conveyed to a rolling crushing mechanism through the scraper chain; the feeding device with the double-wing structure is characterized in that a supporting plate is arranged between a lower tank and an upper tank, the outer side wall of the lower tank is connected with the outer side wall of the upper tank through the supporting plate, a wing plate is connected with the upper end of the supporting plate through a pivot, namely the wing plate rotates around the upper end point of the supporting plate through the rotation action of the pivot;
The scraper type forced conveying mechanism in the double-wing intelligent rolling type damage system comprises a driving motor, a speed reducer, a head wheel, a scraper chain and a tail wheel, wherein the driving motor adopts a high-power alternating current motor; the head wheel, the scraping plate chain and the tail wheel are arranged on a straight line, the head wheel, the scraping plate chain and the tail wheel are arranged along the material conveying direction, the advancing direction of materials is coordinated and adjusted through the head wheel and the tail wheel, the scraping plate chain is connected between the head wheel and the tail wheel, the rotation of the head wheel is used for driving the rotation of the scraping plate chain, the scraping plate is arranged on the scraping plate chain, and the scraping plate drives the materials to advance in a conveying way;
the air supply module comprises a distributed complementary air supply system, the distributed complementary air supply system adopts a three-dimensional cross air inlet structure, a first air supply body and a second air supply body are arranged in a cross staggered mode, the first air supply body comprises an air inlet and two air outlets which are arranged in parallel, the number of the first air supply body is not equal to that of the second air outlets, the number of the first air outlets is 3, and the number of the second air outlets is 4; the second air supply body comprises an air inlet and two exhaust outlets which are arranged in parallel, the number of the first exhaust outlets of the second air supply body is equal to that of the second exhaust outlets, the number of the first exhaust outlets is 5, and the number of the second exhaust outlets is 5.
2. The mobile skid-mounted intelligent dry coal dressing system according to claim 1, further comprising a raw coal crushing scraper conveyor (1), a belt conveyor (2), a classifying screen (3), a fine coal belt conveyor (4), a fine coal scraper conveyor (6), a fine coal scraper conveyor (7), a fine coal scraper conveyor (8), a blower (9), a bag dust collector (10), a draught fan (11), a lump coal belt conveyor (12), an IDS dry separator (13), a lump clean coal belt conveyor (14) and a lump coal belt conveyor (15), wherein the raw coal crushing scraper conveyor (1) crushes raw coal and conveys crushed raw coal to the belt conveyor (2) in a scraper conveying manner, crushed pieces of the crushed raw coal are conveyed to the classifying screen (3) through the belt conveyor (2), the classifying screen (3) is arranged in a raw coal screening workshop, and the raw coal is divided into raw coal with a particle diameter of more than 80mm and a particle diameter of less than or equal to 80 mm; the full-sealed purifying and dedusting system is arranged on the raw coal screening workshop and is used for dedusting the raw coal screening workshop.
3. The mobile skid-mounted intelligent dry coal separation system according to claim 2, wherein a last coal belt conveyor (4) and a lump coal belt conveyor (12) are arranged at the rear end of the classifying screen (3), the last coal belt conveyor (4) is used for conveying raw coal from the classifying screen (3) to the skid-mounted dry separator (5), the lump coal belt conveyor (12) is used for conveying lump coal obtained by screening through the classifying screen (3) to an IDS dry separator (13), and the IDS dry separator (13) is used for sorting lump coal with the particle size of 80-300 mm.
4. The mobile skid-mounted intelligent dry coal separation system according to claim 3, wherein the IDS dry separator (13) is an IDS X-ray intelligent lump coal separator, lump clean coal separated by the IDS dry separator (13) is transported to a clean lump coal storage and transportation via a lump clean coal belt conveyor (14), and gangue separated by the IDS dry separator (13) is transported to a gangue storage and transportation via a lump gangue belt conveyor (15) or directly backfilled into a pit of an open pit.
5. A mobile skid-mounted intelligent dry coal dressing process, which adopts the mobile skid-mounted intelligent dry coal dressing system according to any one of the claims 1-4, and is characterized by comprising the following steps:
step S1, a primary crushing step, namely, firstly crushing giant lump coal with the grain diameter of more than 1 meter, which is excavated from a pit, into lump coal with the grain diameter of less than 1 meter;
s2, a secondary crushing step, namely conveying the lump coal obtained after primary crushing to a designated site for secondary crushing, and obtaining lump coal with the particle size smaller than 300mm in the secondary crushing stage;
and S3, sorting the lump coal obtained after the secondary crushing and the mixed pulverized coal, wherein the raw coal with the particle size of 80-300 mm is sorted by adopting an IDS X-ray intelligent lump coal sorting machine, and the raw coal with the particle size of 0-80mm is sorted by adopting an assembled modularized sorting unit.
6. The mobile skid-mounted intelligent dry coal dressing process according to claim 5, wherein in step S3, raw coal with a particle size of 0-80mm is sorted by an assembled modular sorting unit.
7. The mobile skid-mounted intelligent dry coal dressing process according to claim 6, wherein the classifying and fine sorting step comprises the steps of: a raw coal classification step S31, wherein raw coal with the diameter of 0mm to 80mm is conveyed to a separation workshop through a raw coal belt conveyor with the diameter of 0mm to 80mm, and is separated by adopting an assembled modularized separation unit; and a lump coal transferring and drying step S32, namely conveying the cleaned coal obtained by sorting by the assembled modular sorting unit to a cleaned coal bin for standby by a cleaned coal product belt conveyor with the diameter of 0mm to 80mm, and transferring the obtained gangue product to a backfill pit by the gangue belt conveyor with the diameter of 0mm to 80 mm.
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| CN216174256U (en) * | 2021-11-04 | 2022-04-05 | 唐山神州机械集团有限公司 | Mobile skid-mounted intelligent dry coal dressing system |
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