CN111617879A

CN111617879A - Intelligent pollen-removing system and control method

Info

Publication number: CN111617879A
Application number: CN202010344950.1A
Authority: CN
Inventors: 郭国阳; 马臻; 赵梦生
Original assignee: Cypriott Tianjin Industrial Technology Co ltd
Current assignee: Cypriott Tianjin Industrial Technology Co ltd
Priority date: 2020-04-27
Filing date: 2020-04-27
Publication date: 2020-09-04

Abstract

The invention provides an intelligent powder removing system and a control method, which belong to the field of coal equipment and comprise a powder removing unit, a coal feeding and washing line, a coal pulverizing line, a product coal line and a monitoring assembly, wherein a feeding box is arranged at the upper end of the powder removing unit, a pulverized coal outlet and a coal feeding and washing outlet are arranged at the lower end of the powder removing unit, the pulverized coal outlet is arranged corresponding to the feeding end of the coal pulverizing line, the coal feeding and washing outlet is arranged corresponding to the feeding end of the coal feeding and washing line, the monitoring assembly receives a signal of a monitoring device and controls an electric control element to start and stop, and the discharging end of the coal feeding and washing line is arranged corresponding to a washing and selecting system. The invention can realize online adjustable and controllable superfine particle powder removal of the powder removal granularity and the powder removal amount, is not easy to cause the problems of screen holes and screen seam blockage, is tightly fused with a product quality control system of a coal preparation plant, intelligently and accurately controls the powder removal amount and the product coal quality according to the requirement of product ash content, realizes the maximization of the product yield of the coal preparation plant, is intelligently linked with the control system of the coal preparation plant, and realizes the full automation, unattended operation and intellectualization of the powder removal system.

Description

Intelligent pollen-removing system and control method

Technical Field

The invention belongs to the field of coal technology and equipment, relates to a powder removing unit and a powder removing system which can automatically control the powder removing granularity and the powder removing amount on line of raw coal according to the control demand of product quality and the coal quality condition of the raw coal, optimize the washing proportion and stably control the product coal quality, and particularly relates to an intelligent powder removing system and a control method.

Background

The fine coal in the raw coal can generate a large amount of coal slime in the production process of a coal preparation plant (particularly a power coal preparation plant), and in addition, the fine coal has the problems of difficult washing, high moisture content of the selected product, low heat productivity and the like in the washing process. The coal powder washing has great negative effects on the product quality, the production cost, the sales income, the environmental protection, the water saving and the consumption reduction of the power coal preparation plant. Coal slime reduction in the coal washing industry is a consensus and urgent need of the industry, from the development trend of the current coal preparation technology, pre-selection powder removal is an important means for coal slime reduction, and proper-granularity powder removal and washing according to the coal quality conditions of raw coal and the product quality requirements are urgent needs of the current coal washing industry.

In addition, the intellectualization of the washing process control is a trend of national industrial planning.

At present, a powder removing process serving as a new process section of a coal preparation process is gradually popularized and applied in some power coal preparation plants, but the application of the powder removing process is limited by the insufficient process and technology of the existing powder removing system and equipment:

1. the lower limit of the powder removing classification granularity is high, and is limited by the processing technology of the existing powder removing equipment, the material of a screen surface and a powder removing theoretical model based on the existing powder removing equipment, the lower limit of the achievable powder removing classification granularity is higher, and the lower limit of the achievable classification granularity of the existing powder removing equipment is generally between 3 and 6mm according to different coal qualities, so that the requirement of the powder removing process with finer granularity cannot be met (the lower limit of the partial application powder removing granularity is required to be as low as about 1.5mm according to the different coal qualities and the product quality requirements).

2. The method can not realize the online adjustment of the particle size and the powder removal amount according to the particle size priority principle, the prior powder removal process adopts a screening and classifying process, the adopted equipment is a classifying screen (a fly-over screen or a staggered screen sheet roller screen) with preset screen hole/screen slot size, the powder removal particle size is completely controlled by the screen holes/screen slots, and the screen slot adjustment of the process equipment is difficult. When the coal quality fluctuates for a short time and the particle size or the powder removal amount needs to be flexibly adjusted on line, the existing powder removal process equipment cannot realize the online adjustment of the particle size or the powder removal amount according to the principle of particle size priority.

3. The sieve pores/sieve gaps are easy to block, the particle size of the powder removal is completely controlled by small-size sieve pores/sieve gaps at present, and when the fed materials are wet and sticky, the sieve pores are frequently blocked, so that the powder removal efficiency is seriously reduced, and even normal production cannot be realized.

4. The method can not be effectively integrated with an online control system of the product quality of a coal preparation plant, clean coal after washing and selecting and un-washed pulverized coal are generally mixed to serve as product coal for a powder removal and selection process, and the control of the existing powder removal device is often isolated outside the product quality control system of the coal preparation plant due to the fact that the existing powder removal equipment can not realize online adjustment of powder removal granularity or powder removal amount, and fluctuation of the product coal quality is caused.

5. The automation and intelligence level is low, the automation and intelligence degree of the existing powder removing system is low, the overall automation and intelligence level of the coal preparation plant is lowered, and the method is inconsistent with the national industrial development guide.

In summary, it is necessary to research a powder removing system, and supporting equipment and facilities thereof, which can overcome the problems of the existing powder removing process equipment and can realize intelligent control, in view of the problems of the existing powder removing process system.

Disclosure of Invention

The invention aims to solve the problem of providing an intelligent powder removing system and a control method, realizing online adjustable and controllable superfine particle powder removal, ensuring that the lower limit of the powder removing granularity can reach about 1.5mm, and the problem of screen hole/screen seam blockage is not easy to occur, being tightly fused with a coal preparation plant product quality control system, intelligently and accurately controlling the powder removing amount and the product coal quality according to the product ash content, realizing the maximization of the product yield of the coal preparation plant, being intelligently linked with the coal preparation plant control system, and realizing the full automation, unattended operation and intellectualization of the powder removing system.

In order to solve the technical problems, the invention adopts the technical scheme that: the intelligent powder removing system and the control method comprise a powder removing unit, a coal feeding and washing line, a coal powder line, a product line and a monitoring assembly, wherein the upper end of the powder removing unit is provided with a feeding box, the lower end of the powder removing unit is provided with a coal powder outlet and a coal feeding and washing outlet, the coal powder outlet is arranged corresponding to the feeding end of the coal powder line, the coal feeding and washing outlet is arranged corresponding to the feeding end of the coal feeding and washing line, and the monitoring assembly receives a signal of a monitoring device and controls the start and stop of an electric control element;

and the discharging end of the coal inlet washing line is arranged corresponding to the washing system.

Further, go into the coal washing line and indicate the device of carrying the raw coal of treating washing to the washing system, scrape trigger 1 and go into the raw coal belt of washing that sets gradually including the assembly line, 1 number scrapes trigger and establishes go into the lower extreme of coal washing export, 1 number scrape the discharge end of trigger with it corresponds the setting to go into the raw coal belt of washing, the discharge end that goes into the raw coal belt corresponds the setting with coal washing system starting equipment, the output of washing system is equipped with clean coal belt and waste rock belt.

Further, the fine coal line indicates the device of fine coal to product line that carries the pollen removal unit to deviate from, including 2 number scraper blade machines and the fine coal belt that the assembly line set gradually, 2 number scraper blade machines correspond the setting with the fine coal export, 2 number scraper blade machines's discharge end corresponds the setting with the fine coal belt, the discharge end and the product belt of fine coal belt correspond the setting.

Furthermore, the pulverized coal separated by the powder removing unit does not enter a washing system, and the pulverized coal and clean coal produced by the washing system enter a product belt and are mixed to serve as product coal.

Furthermore, the monitoring component comprises three belt weighers, one belt weigher is used for measuring the weight of raw coal of a fed material, one belt weigher is used for measuring the weight of pulverized coal, one belt weigher is used for measuring the weight of product coal, the monitoring component further comprises two calorimeters or two ash meters and other on-line quality measuring meters, one calorimeter or one ash meter is used for measuring the heat productivity or the ash content of the product coal on a product belt, and the other calorimeter or one ash meter is used for measuring the heat productivity or the ash content of gangue of a washing system, and the monitoring component receives the detection data of the three belt weighers and the two calorimeters or the ash meters, transmits the detection data, performs contrastive analysis and sends an action instruction to a related adjusting execution mechanism.

Furthermore, the powder removing unit comprises a feeding box, a rack and a screening component, wherein an opening at the upper end of the feeding box is used as a feeding port, the lower end of the feeding box is communicated with the rack, a discharge material at the lower end of the rack is arranged corresponding to the upper end of the discharging box, and a dividing and adjusting turning plate and a material flow switching turning plate are arranged in the discharging box;

the screening assembly is erected on the rack and used for carrying out dry classification on the raw coal;

the frame is arranged obliquely downwards from one end of the feeding box to the other end of the feeding box, and the screening assembly is arranged obliquely downwards from one end of the feeding box to the other end of the feeding box; the screening subassembly is including supporting rotation axis and the rotating electrical machines who sets up, the rotating shaft erects in the frame, the rotating electrical machines drive the rotation axis syntropy rotates, be equipped with a plurality of coaxial sieves on the rotation axis, adjacent epaxial sieve of rotation is crisscross to be set up.

Furthermore, the discharging box is divided into a plurality of areas along the length direction of the powder removing unit through a dividing and adjusting turning plate, and the dividing and adjusting turning plate is arranged between two adjacent areas in the discharging box and used for adjusting the size of the divided areas; the lower end of each partition area of the blanking box is provided with two discharge ports, one outlet is communicated with a pulverized coal line, the other outlet is communicated with a coal washing line, and the material flows are switched to turn over the plate to realize that the material enters one direction; the cutting adjusting turning plate and the material flow switching turning plate are driven to rotate by an electric, electrohydraulic or pneumatic actuating mechanism, and the actuating mechanisms of the cutting adjusting turning plate and the material flow switching turning plate receive remote online control of the monitoring assembly.

Further, be equipped with double-deck scraper blade under the workbin along its length direction, the upper strata and the undersize chute material of double-deck scraper blade correspond the setting, continuous operation from top to bottom of double-deck scraper blade, upper scraper blade and the material backward operation of oversize, lower floor's scraper blade and the material syntropy operation of oversize, the discharge gate on double-deck scraper blade upper strata corresponds the setting with fine coal collection device, the discharge gate of double-deck scraper blade lower floor corresponds the setting with going into coal washing collection device.

Further, the lower part in two regions of pan feeding case is kept away from to the workbin the position that double-deck scraper blade upper strata corresponds is equipped with the damper gate, the damper gate is driven by power, pneumatic source or the source that surges, when the damper gate was opened, the screen underflow thing of corresponding section entered into the lower floor of double-deck scraper blade enters into the washing system thereupon, the damper gate is opened gradually from the one side of keeping away from the pan feeding case to the opposite side, or is closed gradually from leaning on pan feeding case one side case opposite side to reach the mesh of reducing or heightening hierarchical granularity.

Further, the discharge end of the pollen trap unit is equipped with secondary screen (ing), secondary screen (ing) includes second screening subassembly, second frame and play workbin, the lower extreme that goes out the workbin is equipped with a discharge gate, second screening subassembly establishes in the second frame, second screening subassembly's structure with screening subassembly's structure is the same, second screening subassembly from a side direction other end slope that is close to the pan feeding case set up downwards and the slope with screening subassembly's slope is unanimous, second screening subassembly's upper end is less than screening subassembly's the lower extreme sets up, second screening subassembly with be equipped with the downward guide plate that sets up of slope between the screening subassembly.

The intelligent pollen-removing system control method comprises the following steps,

s1, feeding and screening, screening raw coal through a powder removing unit, firstly inputting and comparing parameters, sending product quality control indexes, control interval set values and preset separation densities to an intelligent powder removing system and a control center by a washing control system, adjusting according to actual conditions, simulating and calculating powder removing proportion and powder removing granularity by the intelligent powder removing system according to reference coal quality data stored in the system in advance by using a pre-established powder removing model curve, and then sending signals to the powder removing unit for execution;

s2, online adjustment of powder removing particle size and powder removing amount, wherein a segmentation adjustment turning plate and a material flow switching turning plate are arranged in a blanking box, the segmentation adjustment turning plate is arranged between two adjacent areas in the blanking box and used for adjusting the size of the segmentation areas so as to realize adjustment of the powder removing segmentation particle size and the powder removing amount, the lower end of each segmentation area of the blanking box is provided with two discharge ports, one outlet is communicated with a pulverized coal line, the other outlet is communicated with a coal washing line, and the material enters one direction through the material flow switching turning plate;

s3, automatic selection and online switching of material flow direction, entering a coal washing line and a pulverized coal line, wherein the coal entering line refers to a device for conveying raw coal to be washed to a washing system, and comprises a No. 1 scraper and a raw coal belt entering into the washing system, which are sequentially arranged on a production line, the No. 1 scraper is arranged at the lower end of a coal entering outlet, the discharge end of the No. 1 scraper is arranged corresponding to the raw coal belt entering into the washing system, the discharge end of the raw coal belt entering into the washing system is arranged corresponding to the starting equipment of the coal washing system, and the output end of the washing system is provided with a clean coal belt and a gangue belt;

the pulverized coal line is a device for conveying pulverized coal separated by the powder removing unit to a product line, and comprises a No. 2 scraper and a pulverized coal belt which are sequentially arranged on a production line, wherein the No. 2 scraper is arranged corresponding to a pulverized coal outlet, the discharge end of the No. 2 scraper is arranged corresponding to the pulverized coal belt, and the discharge end of the pulverized coal belt is arranged corresponding to the product belt;

s4, online monitoring and debugging, feeding data collected by the belt weigher and the ash content meter back to a control center of the intelligent powder removing system, automatically calculating the quantity of raw coal entering and exiting and the quantity of pulverized coal by the intelligent powder removing system according to the feedback data, wherein the data serve as the basis for adjusting a segmentation adjusting turning plate of the intelligent powder removing system, comparing the coal ash fraction data fed back by the coal content meter with the range of the preset coal ash content of a product in real time by the intelligent powder removing system, if the actual fed-back coal ash content of the product is in the preset range, the segmentation adjusting turning plate of the powder removing system does not act, and if the actual fed-back coal ash content of the product is higher than the upper limit of the range of the preset coal ash content, the segmentation adjusting turning plate moves towards one end of a feeding box, so;

if actual feedback product coal ash content is less than the interval lower limit of preset product coal ash content, cut apart the regulation and turn over the board and move to the one end of keeping away from the pan feeding case, improve the powder particle size of taking off, reduce and go into the proportion of washing, intelligence powder removal system and control method are through the data of monitoring subassembly real-time supervision ash content appearance, and the material cutting position under the adjustment sieve, the control powder volume of taking off guarantees that product coal ash content is in the interval of setting for all the time.

Compared with the prior art, the invention has the following advantages and positive effects.

1. The invention can realize online adjustable and controllable ultrafine particle powder removal, the lower limit of the powder removal particle size can reach about 1.5mm, and the problem of screen hole/screen seam blockage is not easy to occur, the invention is tightly fused with a product quality control system of a coal preparation plant, the powder removal amount and the product coal quality are intelligently and accurately controlled according to the product ash content, the product yield maximization of the coal preparation plant is realized, the intelligent linkage with the control system of the coal preparation plant is realized, and the full automation, unattended operation and intellectualization of a powder removal system are realized;

2. the screen seam selection of the fine particle grading screen in the structure can be properly larger than the actual powder removal grading particle size, and the final powder removal grading particle size is further regulated and controlled by a manner of subsection cutting of undersize materials, namely, the closer the segmentation regulation turning plate is to the feeding box, the finer the final powder removal grading particle size is, so that the lower limit of the powder removal grading particle size can be further reduced and the screen seam blockage phenomenon of the fine particle grading screen can be avoided/reduced;

3. the structure breaks through the limit of the performance of the existing powder removing equipment on the popularization of the powder removing process, so that the environment-friendly, energy-saving and efficient coal preparation process of powder removing washing can be applied to most of power coal preparation plants, the water, electricity and medicament consumption of the power coal preparation plants can be greatly saved, the pressure of the coal slime on the ground to the environment and the economic loss to coal production enterprises are reduced;

4. the structure overcomes the problem that the powder removing granularity of the existing powder removing equipment can not be adjusted on line, and the process adjustment of the powder removing process link is automatic and intelligent. The method not only can greatly reduce the labor cost and the waste of production materials caused by replacing the sieve plate or reloading the sieve surface when the granularity of the existing equipment is adjusted, and reduce the influence of the adjustment time of the powder removing granularity on normal production, but also can enable the powder removing process link to be organically integrated into the whole automatic process control and adjustment system of the coal washery, can timely and accurately adjust the powder removing granularity according to the feedback data of the raw coal and the product quality, control the powder removing amount, and achieve the purposes of accurately and stably controlling the product quality and improving the product yield.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate an embodiment of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:

FIG. 1 is a screening schematic of the present invention;

FIG. 2 is a front view of the pollen trap assembly of the present invention;

FIG. 3 is a sectional view in elevation of the pollen trap assembly of the present invention;

FIG. 4 is a detail view of section A of FIG. 3 of the present invention;

FIG. 5 is a detail view of section B of FIG. 3 of the present invention;

FIG. 6 is a schematic top view of the powdering unit of the present invention;

FIG. 7 is a schematic side view of the pollen removal unit of the present invention;

FIG. 8 is a top view of the powdering unit of the invention without the frame and the hood;

FIG. 9 is a side view of the pollen trap assembly of the present invention without the frame and hood;

FIG. 10 is a schematic structural view of embodiment 2 of the present invention;

FIG. 11 is a schematic flow diagram of the intelligent pollen shedding system of the present invention;

FIG. 12 is a schematic top view of the intelligent pollen shedding system of the present invention;

FIG. 13 is a rear view schematic diagram of the intelligent pollen shedding system of the present invention;

FIG. 14 is a front cross-sectional view of the scraper conveyor No. 1 of the present invention;

FIG. 15 is a detail view of section C of FIG. 14 of the present invention;

fig. 16 is a detail view of section D of fig. 14 in accordance with the present invention.

Reference numerals:

10. a powder removing machine set; 11. feeding into a box; 12. a frame; 13. a screen assembly; 131. a rotating shaft; 132. a sieve plate; 133. A rotating electric machine; 14. a blanking box; 141. a first driving member; 142. a second driving member; 143. dividing and adjusting the turning plate; 144. a material flow switching turnover plate; 145. entering a coal washing outlet; 146. a pulverized coal outlet; 15. a secondary screening machine; 151. a second frame; 152. a second screen assembly; 153. a discharging box; 154. a discharge plate; 16. a baffle; 17. a double-layer scraper; 18. Adjusting a gate; 19. a chute; 20. a coal washing line; 21. no. 1 scraper machine; 22. washing a raw coal belt; 23. a washing and selecting system; 24. washing a clean coal belt; 25. a waste belt; 30. a pulverized coal line; 31. no. 2 scraper machine; 32. a pulverized coal belt; 33. A product belt; 40. a monitoring component; 41. a belt scale; 42. an ash content meter.

Detailed Description

It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.

The following detailed description of specific embodiments of the invention refers to the accompanying drawings.

Fig. 1 shows a sieving mechanism of a material during sieving, which is proved to be correct through a large number of experiments and observation results, wherein particles (called as 'half particles' in the technical term) with a particle size smaller than one half of a sieve pore size are easy-to-sieve particles, the particles can quickly pass through the sieve at a position close to a feeding end of a sieving machine, and the particles with a particle size smaller than the sieve pore/sieve gap size are easy to pass through the sieve, so that the particle size composition of undersize materials along the length direction of the sieving machine from the feeding end to a discharging end is in the following rule: the material below half granule concentrates on the position that is close to the sieve machine pan feeding end, then is close to the discharge end more, and the material content of the bigger particle diameter is higher, the material content of the less particle diameter is lower in the undersize thing granularity composition.

As shown in fig. 12-14, the present invention is an intelligent powder removing system and control method, including a powder removing unit 10, a coal washing line 20, a pulverized coal line 30 and a monitoring assembly 40, wherein the upper end of the powder removing unit 10 is provided with a feeding box 11, the lower end of the powder removing unit 10 is provided with a pulverized coal outlet 146 and a coal feeding outlet 145, the pulverized coal outlet 146 is arranged corresponding to the feeding end of the pulverized coal line 30, the coal feeding outlet 145 is arranged corresponding to the feeding end of the coal washing line 20, the monitoring assembly 40 receives the signal of an electric control element and controls the start and stop of the electric control element, the discharging end of the coal washing line 20 is arranged corresponding to the coal washing system 23, more preferably, the lower end of the pulverized coal outlet 146 is provided with a chute 19, the outlet of the coal entering into the washing machine is provided with independent chutes 19, the upper end of each chute 19 corresponds to a unique inlet, and the lower end of each chute 19 corresponds to a unique outlet, so that the transfer of materials from the powder removing unit 10 to the coal washing line 20 or the pulverized coal line 30 is realized.

Preferably, coal washing line 20 includes that No. 1 that the assembly line set gradually scrapes trigger 21, goes into washing raw coal belt 22 and washing system 23, and No. 1 scrapes trigger 21 and establishes the lower extreme in going into coal washing export 145, and No. 1 scrapes trigger 21's discharge end and goes into washing raw coal belt 22 and correspond the setting, goes into washing raw coal belt 22's discharge end and washing system 23 and corresponds the setting, and washing system 23's output is equipped with and washes clean coal belt 24 and waste belt 25.

Preferably, the fine coal line 30 includes 2 scraping board machine 31, fine coal belt 32 that the assembly line set gradually, and 2 scraping board machine 31 corresponds the setting with fine coal export 146, and 2 scraping board machine 31's discharge end corresponds the setting with fine coal belt 32, and fine coal belt 32 and clean coal belt 24's export all gets into product belt 33, mixes the back as the product coal.

As shown in fig. 14-16, 1 scrape trigger 21 and 2 and scrape trigger 31's structure the same, and 1 number scrapes the upper end opening setting of trigger 21, conveniently receives the material of whereabouts, and the discharge end lower part of lower extreme is equipped with discharge gate 212, and 1 number scrapes trigger 21 and is the box structure, and inside is equipped with the conveyer belt structure, and the upper end equipartition of conveyer belt has a plurality of stirring boards 211, conveniently takes animal workbin discharge gate 212 to transport in the process of transporting.

Preferably, the monitoring assembly 40 includes three belt weighers 41, one belt weigher 41 is used for measuring the weight of the raw coal fed, one belt weigher 41 is used for measuring the weight of the pulverized coal, one belt weigher 41 is used for measuring the weight of the product coal, the monitoring assembly 40 further includes two ash meters 42, one ash meter 42 is arranged corresponding to the product coal on the product belt 33, one gangue belt 25 is arranged corresponding to the coal washing line 20, the monitoring assembly 40 receives and transmits the detection data of the three belt weighers 41 and the two ash meters 42, collects the number and quality information of the raw coal, the pulverized coal and the product coal, facilitates real-time monitoring and adjustment, and forms a closed-loop control and self-feedback system.

Ash content appearance 42 for the real-time supervision of ash content, the ash content is the important parameter of weighing of product quality, control subassembly 40 receives ash content appearance 42 real-time supervision's data, then compare the data of gathering with preset data, contrast and algorithm are the means commonly used in the field, do not carry out the cumulus here, adjust the action of meal removal unit 10 through control center, the detailed statement is as follows, this has realized closed-loop control, be fit for the quick analysis and the online adjustment of coal quality, in this application, ash content appearance 42 also can be replaced with calorimeter, the function of this application can all be realized to the detector that can detect product quality, calorimeter measurable quantity of heat, ash content and calorific capacity all can be used for weighing product quality.

The monitoring component 40 and the control center in the structure can complete the analysis and the arrangement of the quality information of the raw coal and the product number, the PID control of the powder removal amount and the final quality (ash content), and the like, are communicated with a production system of a coal preparation plant, and can be used as subsystems to be incorporated into an integral centralized control system of the coal washing plant.

As shown in fig. 2-10, the powder removing machine set 10 includes a feeding box 11, a frame 2, a sieving assembly 13 and a discharging box 14, wherein the upper end of the feeding box 11 is opened to be used as a feeding port, the lower end of the feeding box is communicated with the frame 2, the upper end of the frame 2 is closed, the discharging at the lower end of the feeding box is arranged corresponding to the upper end of the discharging box 14, and the lower end of the discharging box 14 is provided with a grading assembly;

the screening component 13 is erected on the frame 12, and is used for screening raw coal, the raw coal with the particle size meeting the requirement can fall into a lower feed box 14, on the basis of automatic screening, the deep classification and screening of the raw coal are facilitated through the intervention of the screening component 13, and the efficiency of the deep classification screening is improved;

frame 2 sets up downwards from the one end of pan feeding case 11 to the other end slope, and screening subassembly 13 sets up downwards from the one end of pan feeding case 11 to the other end slope, and frame 2 and screening subassembly 13 match and set up all slope downwards, guarantee that the raw coal constantly conveys downwards under the effect of gravity, save the power conveying, make simple and compact more of structure moreover.

Preferably, the inside of pan feeding case 11 is equipped with guide plate 111 that the downward sloping set up, the in-process of pan feeding is dropped from the upper end to the raw coal, there is the effect of a buffering and direction, the noise reduction, also avoid the raw coal directly to drop to arouse on sieve subassembly 13 and strike or dust, avoid the granule to fly upward and leak, environmental protection more, the upper end of frame 2 is equipped with door type structure's maintenance door 121, the condition that the screening is not smooth and easy appears, can be timely open and look over, be favorable to timely maintenance and maintenance, promote the convenience of maintaining, the quantity of maintenance door 121 is a plurality of, and the equipartition sets up, the upper end of maintenance door 121 is equipped with the handle of convenient operation, promote the convenience of operation, the upper end of frame 2 is equipped with a plurality of hoistholes, the convenience is hoisted in the equipment, promote the convenience of.

Preferably, screening subassembly 13 includes rotation axis 131 and rotating electrical machines 133 that the supporting set up, rotation axis 131 erects in frame 2, the both ends of rotation axis 131 are passed through bearing and the relative frame 2 rotation of bearing frame structure, rotating electrical machines 133 is established in frame 2 through the motor cabinet, rotating electrical machines 133 drive rotation axis 131 rotates, be equipped with coaxial a plurality of sieve 132 on the rotation axis 131, a plurality of sieve 132 parallel arrangement, sieve 132 on the adjacent rotation axis 131 are crisscross to be set up, rotation axis 131 is at the pivoted in-process, drive sieve 132 and rotate, the pan feeding coal enters into between sieve 132 or between sieve 132 and rotation axis 131, the fine coal falls from the gap between sieve and the sieve.

Preferably, the upper portion of the discharging box 14 is hinged with two dividing and adjusting turning plates 143, the dividing and adjusting turning plates 143 are rotated by a first driving member 141, the discharging box 14 is sequentially divided into three regions from one side to the other side of the feeding box 11 by the two dividing and adjusting turning plates, the lower end of each region is provided with two discharging ports, one is a pulverized coal outlet 146 and the other is a coal washing outlet 145, the pulverized coal outlet 146 and the coal washing outlet 145 realize that only one is in an open state through the position change of the material flow switching turning plate 144, the dividing and adjusting turning plates are rotated under the action of the first driving member 141, the dividing and adjusting turning plates are fixed with the output shaft of the first driving member 141, the rotating angle of the dividing and adjusting turning plates is adjusted according to the discharging condition, namely the particle size of each region, if the particles are larger in the region close to the feeding box 11, the first driving member 141 drives the dividing and adjusting turning plates to rotate, the particle size of the area closest to the feeding box 11 is ensured to be minimum to meet the set requirement, otherwise, if the particle size of the area closest to the feeding box 11 is small enough and the particle size of the adjacent second area is small, the cutting and adjusting turning plate rotates at one side of the box away from the feeding box 11 under the action of the first driving piece 141 to enlarge the corresponding area, the first driving piece 141 can be adjusted at any time through the control center, online real-time adjustment is realized, the automation degree is high, the manpower is saved, the control center adopts a PLC (programmable logic controller) control center, which is a universal control form in the market, the programming is simple and easy to learn, the training cost of operators is reduced, besides the PLC control program, the singlechip structure can also be adopted, the running states of all electrical components are monitored through the PLC/singlechip and related control components in the cabinet according to externally input process parameters, Controlling the subsection cutting position of undersize materials and the heading of each undersize material, and the like.

Preferably, the material flow switching flap 144 is hinged in the blanking box 14, the material flow switching flap 144 is driven to rotate by a second drive arranged on the blanking box 14, two extreme positions of the material flow switching flap 144, one corresponding to the pulverized coal outlet 146, one corresponding to the coal washing outlet 145, and only one of them may be opened, the open position may be different for different areas of the headbox 14, in the region that is close to pan feeding case 11, the undersize granularity is fine, and the material flow switches turns over board 144 lid and establishes at income coal washing export 145, and the fine coal that sieves out directly discharges through fine coal export 146, directly enters into next process, and first driving piece 141 and second driving piece 142 all can adopt the motor, revolving cylinder or the spacing automatic picture peg gate structure of pneumatics, do not do in this application and prescribe a limit to, the equivalent structure that many realizations, revolving cylinder, motor lead screw isotructure all can realize.

Preferably, a secondary screening machine 15 is arranged at one end, away from the feeding box 11, of the frame 2, the secondary screening machine 15 comprises a second screening assembly 152, a second frame 151 and a discharging box 153, the second frame 151 is arranged at the upper end of the discharging box 153 and is communicated with the upper end of the discharging box 153, a discharging port is arranged at the lower end of the discharging box 153, the second screening assembly 152 is arranged on the second frame 151, the structure of the second screening assembly 152 is the same as that of the screening assembly 13, and a discharging plate 154 which is obliquely arranged downwards is arranged at one end, away from the frame 2, of the second frame 151, so that the efficiency of coal washing is improved; more preferably, second screen assembly 152 sets up and the slope is unanimous with the slope of screen assembly 13 from a side to the other end slope that is close to pan feeding box 11 downwards, and the upper end of second screen assembly 152 is less than the lower extreme setting of screen assembly 13, is equipped with the guide plate 16 that the slope set up downwards between second screen assembly 152 and the screen assembly 13 for when the cascaded conveying of raw coal, guarantee the stability of conveying, and the setting of drop height type has certain vibrations effect, play the effect of the separation blanking of front and back section.

In the structure, the screening component 13 adopts a screen sheet roller screen structure, and can also select a tension screen suitable for fine particle classification, and the selection is carried out according to the actual situation, so that the screening result can be realized, the length and the width of the frame 2 and the blanking box 14 are matched, the number of the area sections of the blanking box 14 can be adjusted according to the actual situation, can be set to be multiple, and can be set and adjusted according to the actual requirement.

In the actual working process, the structure is locked with other production system equipment of a coal preparation plant, the automatic start is carried out according to the sequence of reverse coal flow, firstly, the input and the comparison of parameters are carried out, a washing control system sends a product quality control index, a control interval set value and a preset separation density to an intelligent powder removing system and a control method, the parameters of different product settings are different and are adjusted according to the actual situation, the intelligent powder removing system simulates and calculates the powder removing proportion and the powder removing granularity by utilizing a pre-established powder removing model curve according to reference coal quality data stored in the system in advance, then, the signals are sent to a powder removing machine set to be executed, the powder removing machine set acts in place according to a signal sent by a control center of the intelligent powder removing system to serve as the initial working state of the powder removing system, the step is finished in the automatic start process, and the washing control system is a system which is always used in the, the existing structure in the market can be matched with the application for use.

The operation of the monitoring component 20, the data collected by the belt weigher and the ash content meter are fed back to the control center of the intelligent powder removing system, the intelligent powder removing system automatically calculates the quantity and the powder removing amount of washed raw coal according to the feedback data, and the data can be used as the basis for adjusting the cutting and adjusting turning plate of the intelligent powder removing system.

The intelligent powder removing system compares the product coal ash fraction data fed back by the product coal ash content instrument with a preset product coal ash content range in real time, if the actual feedback product coal ash content is in the preset range, the segmentation adjusting turning plate of the powder removing system does not act, and if the actual feedback product coal ash content is higher than the upper limit of the preset product coal ash content interval, the segmentation adjusting turning plate moves towards one end of the feeding box, so that the powder removing granularity is reduced, and the washing proportion is improved; if actual feedback product coal ash content is less than the interval lower limit of preset product coal ash content, cut apart the regulation and turn over the board and move to the one end of keeping away from the pan feeding case, improve the powder particle size of taking off, reduce and go into the proportion of washing, intelligence powder removal system and control method are through the data of monitoring subassembly real-time supervision ash content appearance, and the material cutting position under the adjustment sieve, the control powder volume of taking off guarantees that product coal ash content is in the interval of setting for all the time.

When the coal preparation plant is stopped, the intelligent powder removal process system equipment is locked with other production system equipment of the coal preparation plant, and the intelligent powder removal process system equipment is automatically stopped according to the coal flow sequence.

The working process of the powder removing unit is as follows, raw coal is fed into the feeding box 11 through a feeding belt, under the action of gravity, the raw coal is conveyed from one end of the feeding box 11 to the other end, at the moment, according to the principle shown in figure 1, the fine coal with the required granularity smaller than 1.5mm falls into the area of the discharging box 14 closest to the feeding box 11, then the material flow switching turnover plate 144 covers the coal inlet washing outlet 145, the fine coal with the granularity requirement is output from the fine coal outlet 146, the raw coal without the granularity requirement is continuously conveyed downwards on the screening component 13, in the conveying process, the position of the material flow switching turnover plate 144 is adjusted according to the granularity size, the output of the fine coal is realized, the raw coal is continuously screened along with the continuous conveying of the raw coal, the raw coal is continuously deeply graded and output, and finally enters the secondary screening machine 15, the coal inlet washing efficiency is improved, and the whole structure is improved, the material flow switching turning plate 144 and the position of the partition adjusting turning plate can be adjusted through the control center, online intelligent adjustment and classification are achieved, the automation degree is high, the labor intensity is reduced, and the working efficiency is improved.

Example 2: as shown in fig. 11, different from the above embodiment, the lower box 14 is sequentially divided into three regions from one side to the other side of the feeding box 11, a double-layer scraper 17 is arranged below the lower box 14 along the length direction thereof, the upper layer of the double-layer scraper 17 is arranged corresponding to the undersize chute material, the double-layer scraper 17 continuously runs up and down, the upper layer scraper runs in the reverse direction to the oversize material, the lower layer scraper runs in the same direction to the oversize material, the discharge port on the upper layer of the double-layer scraper 17 is arranged corresponding to the pulverized coal collecting device, and the discharge port on the lower layer of the double-layer scraper 17 is arranged corresponding to the coal washing collecting.

Preferably, the lower bin 14 is far away from the lower part of the two regions of the feeding bin 11, an adjusting gate 18 is arranged at a position corresponding to the upper layer of the double-layer scraper 17, the adjusting gate 18 is driven by an electric power source, a pneumatic power source or a hydraulic power source, when the adjusting gate 18 is opened, undersize of corresponding sections enter the lower layer of the double-layer scraper 17 and then enter the washing system, the adjusting gate 18 is gradually opened from one side far away from the feeding bin 11 to the other side, the undersize particle size is set according to regulation, the opening degree of each adjusting gate 18 can be controlled randomly according to requirements, online automatic adjustment is achieved, and the automatic adjustment is convenient, reliable and intelligent.

The specific working process of the embodiment 2 is different from the above embodiment in that the separation and adjustment of the turning plate is not performed on the screening of the particle size, the adjustment gate 18 on the double-layer scraper 17 is used for controlling, the adjustment gate 18 has the function equivalent to the separation and adjustment of the turning plate, the double-layer scraper 17 has the function equivalent to the powder outlet and the coal washing outlet 145, the blanking screening of the two embodiments is different, but the function of deep classification can be realized, and the on-line adjustment can be realized.

While one embodiment of the present invention has been described in detail, the description is only a preferred embodiment of the present invention and should not be taken as limiting the scope of the invention. All equivalent changes and modifications made within the scope of the present invention shall fall within the scope of the present invention.

Claims

1. Intelligence gumming system, its characterized in that: the coal powder feeding and washing device comprises a powder removing unit, a coal feeding and washing line, a coal powder line, a product line and a monitoring assembly, wherein a feeding box is arranged at the upper end of the powder removing unit, a coal powder outlet and a coal feeding and washing outlet are arranged at the lower end of the powder removing unit, the coal powder outlet is arranged corresponding to the feeding end of the coal powder line, the coal feeding and washing outlet is arranged corresponding to the feeding end of the coal feeding and washing line, and the monitoring assembly receives a signal of a monitoring device and controls the start and stop of an electric control element;

2. The intelligent pollen shedding system of claim 1, wherein: go into the coal washing line and indicate to carry the device of treating washing raw coal to washing system, 1 number that sets gradually including the assembly line scrapes the trigger and goes into washing raw coal belt, 1 number scrapes the trigger and establishes go into the lower extreme of washing coal export, 1 number scrape the discharge end of trigger with it corresponds the setting to go into washing raw coal belt, the discharge end that goes into washing raw coal belt corresponds the setting with coal washing system starting equipment, the output of washing system is equipped with clean coal belt and waste rock belt.

3. The intelligent pollen shedding system of claim 1, wherein: the fine coal line indicates the device of fine coal to product line that carries the pollen trap group to deviate from, scrape trigger and fine coal belt No. 2 that set gradually including the assembly line, 2 scrape trigger and correspond the setting with the fine coal export, 2 scrape trigger's discharge end and fine coal belt and correspond the setting, fine coal belt's discharge end corresponds the setting with the product belt.

4. The intelligent pollen shedding system of claim 1, wherein: the monitoring assembly comprises three belt weighers, one belt weigher is used for measuring the weight of raw coal fed in, one belt weigher is used for measuring the weight of pulverized coal, one belt weigher is used for measuring the weight of product coal, the monitoring assembly further comprises two calorimeters or two ash meters and other online quality measuring meters, one calorimeter or one ash meter is used for measuring the heat productivity or the ash content of the product coal on a product belt, one calorimeter is used for measuring the heat productivity or the ash content of gangue of a washing system, and the monitoring assembly receives the detection data of the three belt weighers and the two calorimeters or the ash meters, transmits the detection data, performs contrastive analysis and sends an action instruction to a relevant adjusting and executing mechanism.

5. The intelligent pollen shedding system of claim 1, wherein: the powder removing unit comprises a feeding box, a rack and a screening component, wherein an opening at the upper end of the feeding box is used as a feeding port, the lower end of the feeding box is communicated with the rack, a discharging material at the lower end of the rack is arranged corresponding to the upper end of the discharging box, and a dividing and adjusting turning plate and a material flow switching turning plate are arranged in the discharging box;

6. The intelligent pollen shedding system of claim 5, wherein: the discharging box is divided into a plurality of areas along the length direction of the powder removing unit through a dividing and adjusting turning plate, and the dividing and adjusting turning plate is arranged between two adjacent areas in the discharging box and used for adjusting the size of the divided areas; the lower end of each partition area of the blanking box is provided with two discharge ports, one outlet is communicated with a pulverized coal line, the other outlet is communicated with a coal washing line, and the material flows are switched to turn over the plate to realize that the material enters one direction; the cutting adjusting turning plate and the material flow switching turning plate are driven to rotate by an electric, electrohydraulic or pneumatic actuating mechanism, and the actuating mechanisms of the cutting adjusting turning plate and the material flow switching turning plate receive remote online control of the monitoring assembly.

7. The intelligent pollen shedding system of claim 5, wherein: the lower feed box is provided with double-layer scrapers along the length direction, the upper layers of the double-layer scrapers correspond to the undersize chute materials, the double-layer scrapers continuously run up and down, the upper scrapers run in the reverse direction to the oversize materials, the lower scrapers run in the same direction to the oversize materials, the discharge port of the upper layers of the double-layer scrapers corresponds to the pulverized coal collecting device, and the discharge port of the lower layers of the double-layer scrapers corresponds to the coal washing collecting device.

8. The intelligent pollen shedding system of claim 7, wherein: the lower bin is kept away from the below in two regions of pan feeding case the position that double-deck scraper blade upper strata corresponds is equipped with the damper gate, the damper gate is driven by electric source, pneumatic source or the source that surges, when the damper gate was opened, the screen underflow thing of corresponding section entered into the lower floor of double-deck scraper blade enters into the washing system thereupon, the damper gate is progressively opened from the one side of keeping away from the pan feeding case to the opposite side, or is progressively closed from leaning on pan feeding case one side case opposite side to reach the mesh of reducing or heightening hierarchical granularity.

9. The intelligent pollen shedding system according to any one of claims 5-8, wherein: the discharge end of the powder removal unit is provided with a secondary screening machine, the secondary screening machine comprises a second screening component, a second rack and a discharge box, the lower end of the discharge box is provided with a discharge port, the second screening component is arranged on the second rack, the structure of the second screening component is the same as that of the screening component, the second screening component is downwards arranged from one side close to the feed box to the other end in a slope manner, the slope of the second screening component is consistent with that of the screening component, the upper end of the second screening component is lower than that of the screening component, and a guide plate is arranged between the second screening component and downwards arranged in a slope manner.

10. The intelligent pollen removal system control method is characterized in that: comprises the following steps of (a) carrying out,