CN110003931B - Coal blending control system and method - Google Patents
Coal blending control system and method Download PDFInfo
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- CN110003931B CN110003931B CN201910388753.7A CN201910388753A CN110003931B CN 110003931 B CN110003931 B CN 110003931B CN 201910388753 A CN201910388753 A CN 201910388753A CN 110003931 B CN110003931 B CN 110003931B
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- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
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Abstract
The invention discloses a coal blending control system and a method, wherein the system comprises: the system comprises a coal mixing belt, a coal mixing driver, a coal blending calculating device, a PLC (programmable logic controller), a material level meter and a coal bunker gate; the coal blending driver, the coal blending calculating device and the coal bunker gates are electrically connected with the PLC, the level meters are electrically connected with the coal blending calculating device, the coal blending belt is arranged below outlets of the coal bunkers, the coal blending driver is arranged at the bottom of the coal blending driver, the coal bunker gates are arranged at the outlets of the coal bunkers, the coal blending calculating device analyzes coal blending by combining coal quality stored in each coal bunker with coal quantity fed back by the level meters in real time according to received target coal quality to obtain coal blending flow parameters of each coal bunker, the coal blending flow parameters are sent to the PLC, the PLC controls the opening degree of the coal bunker gates of the coal bunkers to flow coal into the coal blending belt according to the coal blending flow parameters, and controls the coal blending driver to drive the coal blending belt to mix and output the coal from the coal bunkers. The coal blending process is automatically finished without manual participation.
Description
Technical Field
The invention belongs to the technical field of coal blending, and particularly relates to a coal blending control system and method.
Background
The coal blending refers to a process of blending the coal with different coal qualities according to the requirements of the characteristics of target coal quality and supplying the coal to a target coal bunker in a coal storage yard or in the process of conveying the coal, namely, the coal with different coal qualities is mixed according to a certain proportion. The main coal blending modes adopted at present are as follows: bin mixing, bed (warehouse) mixing, belt mixing and direct in-furnace mixing. The invention relates to belt mixing, in which mixing of coal is carried out on a conveyor belt. The coal quality of the mode is easy to adjust, and when the coal quality changes, the coal quality of the mixed coal can be adjusted by only adjusting the coal taking proportion from different coal piles.
However, the extraction proportion of each coal bunker in the existing belt mixing type coal blending process needs manual control, so that the error is high, and the coal output efficiency is reduced.
Disclosure of Invention
In view of the above, the present invention proposes a coal blending control system and method so as to overcome the above problems or at least partially solve the above problems.
According to an aspect of the present invention, there is provided a coal blending control system including: the system comprises a coal mixing belt, a coal mixing driver, a coal blending calculating device, a PLC (programmable logic controller), a material level meter and a coal bunker gate;
the coal mixing driver, the coal blending calculating device and the coal bunker gate are all electrically connected with the PLC, the level indicator is electrically connected with the coal blending calculating device, the coal blending belt is arranged below the outlets of the coal bins, the coal blending driver is arranged at the bottom of the coal blending driver, the outlet of each coal bunker is provided with a coal bunker gate, the coal blending calculating device is used for calculating the coal blending of the coal bunker according to the received target coal quality, the coal quality stored in each coal bunker is combined with the coal quantity fed back by the level indicator in real time to analyze coal blending to obtain the coal blending flow parameter of each coal bunker, and the coal blending flow parameter is sent to the PLC controller, the PLC controller controls the opening degree of a coal bunker gate of each coal bunker to flow coal into a coal blending zone according to the coal blending flow parameter, and controlling the coal mixing driver to drive the coal mixing belt to mix and output the coal from each coal bunker.
Further, the system further comprises: the coal feeding device comprises a coal feeding belt, a coal feeding driver and a first online coal quality analyzer, wherein the coal feeding driver and the first online coal quality analyzer are electrically connected with the PLC, the first online coal quality analyzer is arranged at an inlet of the coal feeding belt, the coal feeding belt is arranged above bin openings of a plurality of coal bins, and the coal feeding driver is arranged at the bottom of the coal feeding belt;
after incoming coal is placed at the inlet of the coal inlet belt, the first online coal quality analyzer analyzes the coal quality of the incoming coal, determines a target coal bunker matched with the coal quality of the incoming coal, and controls the coal inlet driver to drive the incoming coal belt to convey the incoming coal to the target coal bunker by using the PLC.
Further, the coal feeding belt comprises: the coal conveying belt is arranged at a coal inlet and is connected with the coal feeding belt, the coal conveying belt conveys received incoming coal to the coal feeding belt, and the incoming coal is conveyed to a target coal bunker by the coal feeding belt.
Furthermore, a plurality of coal ploughs are arranged on the coal feeding belt, each coal plough corresponds to the bin mouth of one coal bin, each coal plough is electrically connected with the PLC, and the coal ploughs are used for throwing coal into corresponding target coal bins.
Furthermore, a deviation structure and a belt weigher are arranged on the coal mixing belt and the coal feeding belt, wherein a plurality of belt weighers are arranged on the coal mixing belt.
Further, a second on-line coal quality analyzer is arranged at the tail end of the coal blending belt and electrically connected with the coal blending computing device, when the coal blending belt conveys the blended coal to the tail end, the second on-line coal quality analyzer detects the coal quality of the blended coal and feeds the detected coal quality back to the coal blending computing device so that the coal blending computing device can compare the detected coal quality with the target coal quality, if the comparison is successful, the blended coal is output by using the coal blending belt, and if the comparison is unsuccessful, the coal blending is analyzed again until the detected coal quality is successfully compared with the target coal quality.
Further, an air cannon is arranged at the upper part of an outlet of each coal bunker, a vibration coal feeder is arranged at the outlet of each coal bunker, and the vibration coal feeder is arranged above the coal mixing belt.
According to another aspect of the present invention, there is provided a coal blending control method including:
the coal blending computing device receives input target coal quality;
the coal blending calculation device obtains the coal quality stored in each coal bunker and the coal amount fed back by the level indicator in real time;
the coal blending calculation device combines the target coal quality with the coal quality and the coal quantity of each coal bunker to analyze coal blending to obtain coal blending flow parameters of the plurality of coal bunkers;
the coal blending calculation device screens out a coal blending flow parameter closest to the target coal quality from the coal blending flow parameters of the coal bunkers as a target coal blending flow parameter, and sends the target coal blending flow parameter to the PLC;
and the PLC controls the opening of the coal bunker gate of each coal bunker to flow coal into a coal mixing belt according to the target coal blending flow parameter, and controls the coal mixing driver to drive the coal mixing belt to mix and output the coal from each coal bunker.
Further, before the coal blending calculation device receives the input target coal quality, the method further comprises:
after the incoming coal is placed at the coal inlet, a first online coal quality analyzer analyzes the coal quality of the incoming coal, determines the coal quality of the incoming coal, matches the coal quality information of the stored coal in each coal bunker, and sends the target coal bunker number of the stored coal quality matched with the coal quality information of the incoming coal to a PLC (programmable logic controller);
the PLC is used for controlling a coal feeding driver to drive a coal feeding belt to convey coal to a target coal bunker;
the material level meter arranged in the target coal bunker is used for monitoring the material level condition in real time, if the material level meter monitors that the target coal bunker is full, an empty coal bunker number is called, the empty coal bunker number is sent to the PLC controller, and the PLC controller controls the coal entering driver to drive the coal entering belt to convey coal to the empty coal bunker.
Further, the method further comprises:
the coal blending computing device obtains the coal quality detected by the second on-line coal quality analyzer for the mixed coal and compares the coal quality with the target coal quality;
if the comparison is successful, outputting the well-mixed coal by using a coal mixing belt;
if the comparison is unsuccessful, the coal blending calculating device performs up-regulation or down-regulation on the coal blending flow parameter of one coal bunker in the coal blending flow parameters of the coal bunkers according to a preset proportion, the second on-line coal quality analyzer is used for detecting the mixed coal, if the detection is unsuccessful, the coal blending calculating device performs up-regulation or down-regulation on the coal blending flow parameter of the next coal bunker in the coal blending flow parameters of the coal bunkers according to the preset proportion until the coal quality detected by the second on-line coal quality analyzer on the mixed coal is matched with the target coal quality.
The coal blending control system and the method provided by the embodiment of the invention have the following beneficial effects:
according to the technical scheme, the coal in each coal bunker can be automatically mixed on the coal mixing belt according to the target coal quality of the required coal, the whole process does not need manual participation, errors caused by manual work are effectively avoided, and the working efficiency and the coal production quality can be improved.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description, serve to explain the principles of the invention.
The invention will be more clearly understood from the following detailed description, taken with reference to the accompanying drawings, in which:
FIG. 1 is a schematic structural diagram of a coal blending control system according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of data trend of coal blending according to an embodiment of the present invention;
FIG. 3 is a schematic flow chart of a coal blending control method according to an embodiment of the present invention;
FIG. 4 is a schematic flow chart of storing coal according to an embodiment of the present invention.
Description of reference numerals: 1 coal mixing belt, 11 coal mixing driver, 12 deviation structure, 13 belt weigher, 14 second on-line coal quality analyzer, 2 coal blending calculating device, 3PLC controller, 4 material level meter, 5 coal bunker gate, 6 coal feeding belt, 61 coal feeding driver, 62 coal conveying belt, 63 coal feeding belt, 631 coal plough, 64 first on-line coal quality analyzer,
7 air cannon, 8 vibration feeder.
Detailed Description
Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that: the relative arrangement of the components, the numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise.
Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description.
The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses.
Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.
As shown in fig. 1, the coal blending control system of the present invention includes: a coal mixing belt 1, a coal mixing driver 11, a coal blending calculating device 2, a PLC (Programmable Logic Controller) Controller 3, a level indicator 4 and a coal bunker gate 5;
the coal blending driver 11, the coal blending calculating device 2 and the coal bunker gate 5 are electrically connected with the PLC 3, the material level meter 4 is electrically connected with the coal blending calculating device 2, the coal blending belt 1 is arranged below outlets of a plurality of coal bunkers, the coal blending driver 11 is arranged at the bottom of the coal blending driver 11, the coal bunker gate 5 is arranged at the outlet of each coal bunker, the coal blending calculating device 2 is used for analyzing coal blending by combining the coal quality stored in each coal bunker and the coal quantity fed back by the material level meter 4 in real time according to the received target coal quality to obtain the coal blending flow parameter of each coal bunker, the coal blending flow parameter is sent to the PLC 3, the PLC 3 is used for controlling the opening of the coal bunker gate 5 of each coal bunker to flow into the coal blending belt 1 according to the coal blending flow parameter, and controlling the coal blending driver 11 to drive the coal blending belt 1 to blend the coal from each coal bunker and then output the mixed coal.
Wherein, the coal bunker gate 5 is a hydraulic gate plate.
In the above technical solution, the coal blending engineer may input a target coal quality (for example, ash content, volatile matter, sulfur content, moisture content, fixed carbon, calorific value) of the coal required for production into the coal blending calculation device 2, and the coal blending calculation device 2 is provided with a database in which kinds and coal blending ratios of various coals corresponding to various coal qualities are stored. The coal blending calculating device 2 retrieves the types and the blending proportions of various corresponding coals according to the target coal quality, determines the types of the coals according to the coal quality stored in each coal bunker at present, determines the number of the coal bunker corresponding to the type of the required coal in the blending proportions, and determines the coal amount output from each coal bunker according to the weight (for example, 100 tons) of the required coal and the coal amount detected by the material level meter 4. For example, two coals, A and B, are required to be 2: the coal blending ratio of 1 is that 300 tons of coal are blended in total, 200 tons of coal A and 100 tons of coal B are needed.
After the information is determined, the corresponding information such as the number of the coal bunker, the coal blending proportion, the required coal quantity and the like is sent to the PLC 3, the PLC controls the opening degree of the corresponding coal bunker gate 5 to enable the coal to be output from the coal bunker according to the coal blending proportion, then the coal is mixed on the coal mixing belt 1 to form the coal required for production, and the coal is output to the coal buffering bin, so that the coal can be transported after being output from a coal outlet of the coal buffering bin by a vehicle.
Through the technical scheme, the coal of each coal bunker can be automatically mixed on the coal mixing belt 1 according to the target coal quality of the required coal, the whole process does not need manual participation, errors caused by manual work are effectively avoided, and the working efficiency and the coal production quality can be improved.
In a particular embodiment, the system further comprises: the coal feeding device comprises a coal feeding belt 6, a coal feeding driver 61 and a first online coal quality analyzer 64, wherein the coal feeding driver 61 and the first online coal quality analyzer 64 are electrically connected with the PLC 3, the first online coal quality analyzer 64 is arranged at the inlet of the coal feeding belt 6, the coal feeding belt 6 is arranged above the bin mouths of a plurality of coal bins, and the coal feeding driver 61 is arranged at the bottom of the coal feeding belt 6;
after the incoming coal is placed at the inlet of the coal belt 6, the first online coal quality analyzer 64 analyzes the coal quality of the incoming coal, determines a target coal bunker matched with the coal quality of the incoming coal, and controls the coal driver 61 to drive the incoming coal belt 6 to convey the incoming coal to the target coal bunker by using the PLC 3.
The raw coal can be raw coal or clean coal, the raw coal refers to coal produced by coal mines and not subjected to washing and screening, and the clean coal refers to coal which is subjected to coal washing to remove gangue in the coal and becomes coal suitable for special purposes.
In the above scheme, the coal belt 6 is further provided with a coal belt pull switch, the switch can control the start and stop of the coal feeding driver 61, and when an emergency occurs, the start and stop of the coal feeding driver 61 can be controlled by the coal belt pull switch.
Through above-mentioned technical scheme, can be automatic place the coal in the coal bunker that corresponds in the future, whole process need not artifical the participation, has effectively avoided the error of artificial leading to the fact, can also improve work efficiency.
In a particular embodiment, the coal belt 6 comprises: the coal conveying belt 62 is arranged at a coal inlet, the coal conveying belt 62 is connected with the coal feeding belt 63, the coal conveying belt 62 conveys the received coal to the coal feeding belt 63, and the coal is conveyed to a target coal bunker by the coal feeding belt 63.
In the above technical solution, since the incoming coal inlet of the factory is not in straight line communication with each coal bunker, the mined incoming coal is transported to the factory by a vehicle, transported to the upper coal belt 63 by the coal transporting belt 62, and transported to the target coal bunker by the upper coal belt 63.
In the embodiment, a plurality of coal ploughs 631 are disposed on the upper coal belt 63, each coal plough 631 corresponds to a bin mouth of one coal bin, each coal plough 631 is electrically connected with the PLC controller 3, and the coal ploughs 631 are used for throwing coal into corresponding target coal bins.
Through the scheme, the coal plough 631 is used for throwing coal into the corresponding target coal bunker, so that the phenomenon of material scattering can be effectively avoided, and the use is convenient.
In the specific embodiment, the deviation structure 12 and the belt weighers 13 are respectively arranged on the coal mixing belt 1 and the coal feeding belt 63, wherein a plurality of belt weighers 13 are arranged on the coal mixing belt 1.
In the technical scheme, the deviation switch of the deviation structure 12 is arranged at one end of the coal mixing belt 1 and one end of the coal feeding belt 63, when a worker finds that the coal is deviated in the coal conveying process, the deviation switch can be triggered, and the deviation structure 12 is started to shake and return the deviated coal. The belt weigher 13 is used for measuring the weight of coal on a coal belt in real time, and once the weight is too high or too low, the coal amount conveyed needs to be adjusted in time. The reason that the belt weighers 13 are arranged on the coal mixing belt 1 is that coal needs to be discharged from a plurality of coal bunkers in the coal mixing process, so that the belt weighers 13 need to be arranged on the coal mixing belt 1 behind each coal bunker, and when the belt weighers 13 detect that the weight is too low in the coal mixing process, the situation that the coal bunkers are blocked is proved to occur, and the coal mixing belt needs to be processed in time.
In the specific embodiment, a second on-line coal quality analyzer 14 is arranged at the tail end of the coal blending belt 1, the second on-line coal quality analyzer 14 is electrically connected with the coal blending computing device 2, when the blended coal is conveyed to the tail end by the coal blending belt 1, the second on-line coal quality analyzer 14 detects the coal quality of the blended coal and feeds the detected coal quality back to the coal blending computing device 2 so that the coal blending computing device 2 can compare the detected coal quality with the target coal quality, if the comparison is successful, the blended coal is output by using the coal blending belt 1, if the comparison is unsuccessful, the coal blending is analyzed again until the detected coal quality is successfully compared with the target coal quality.
Through the technical scheme, the coal quality after coal mixing can be analyzed, the coal blending can be timely reanalyzed once the coal blending is found not to meet the requirements, the coal blending process is the same as the coal blending process, the coal quality can be ensured, and the occurrence of inferior coal is avoided.
In the specific embodiment, an air cannon 7 is arranged at the upper part of the outlet of each coal bunker, a vibration coal feeder 8 is arranged at the outlet of each coal bunker, and the vibration coal feeder 8 is arranged above the coal mixing belt 1.
In the technical scheme, once the air cannon 7 can be started under the condition that the coal blockage occurs, the coal blocked at the outlet of the coal bunker is blown away, the air cannon 7 can be arranged in a plurality of modes, when the coal blockage occurs, the air cannon 7 is started in sequence, if the coal blockage condition cannot be solved after the air cannons 7 are started for one time, the air cannon is started for one time, the coal blockage condition cannot be solved, the air cannon is started for another time, if the coal blockage continues after the air cannon is started for N times, the alarm device is started, and a worker is prompted to process.
The vibration coal feeder 8 can control the coal feeding quantity, so that each coal bunker can discharge coal according to the coal blending proportion corresponding to the target coal quality.
In another embodiment of the invention, the coal blending control system comprises two parts of coal inlet and coal outlet. The coming coal is conveyed to the upper coal belt 63 through the coal conveying belt 62, the components of the coming coal are analyzed by an online coal quality analyzer at the head of the upper coal belt 63, the coming coal is divided into a plurality of different grades according to the difference of ash content, moisture content, heat value and sulfur content, the coal quality parameters in the existing coal bunker are searched, and if the coal bunker close to the coming coal quality parameters exists, the corresponding coal plough 631 is started, and the coming coal enters the coal bunker close to the coming coal quality parameters. If there is no bunker close to the quality parameter of the incoming coal, the coal is sent to a new empty bunker.
The level indicator 4 arranged at the top of the coal bunker can monitor the material level of the coal bunker, and when the coal bunker is full, other empty bunkers can be replaced with coal for coal discharging. Therefore, the coal is stored in grades according to the coal quality parameters in the future, and raw materials are prepared for coal blending.
When coal blending is needed, the coal blending computing device 2 inquires similar formulas in the database according to the target coal quality parameters and the coal quality and the coal quantity in the existing coal bunker, selects the coal blending proportion according to the cost optimization principle, and sends the coal blending flow parameters of each coal bunker in the coal blending proportion to the PLC 3.
The PLC 3 forms a closed-loop control system through a hydraulic flashboard (namely a coal bunker gate 5), a vibration coal feeder 8 and a belt scale 13, and adjusts the opening of the hydraulic flashboard at the outlet of the coal bunker and the vibration frequency of the vibration coal feeder 8 in real time by adopting a PID control algorithm to achieve the purpose of accurately controlling the coal feeding flow of each coal bunker. Coal falling from each coal bunker is mixed on the coal mixing belt 1, the coal blending parameters and the target coal quality parameters are corrected by an online coal quality analyzer at the tail end of the coal mixing belt 1 after mixing, when the coal quality parameters exceed the upper limit and the lower limit, the corresponding low-grade coal or high-grade coal in the coal proportion of each coal bunker in the coal blending proportion is upwards or downwards adjusted by 2%, the coal is compared again after waiting for 10min, the comparison result is judged, and the process is continuously repeated. The specific data trend is shown in fig. 2.
And continuously and dynamically adjusting the coal blending ratio until the obtained coal quality parameters meet the target coal quality parameters so as to realize the optimal economic benefit.
Another embodiment of the present invention provides a coal blending control method, which is implemented by using the coal blending control system in the foregoing embodiment, and specifically, as shown in fig. 3, the method includes:
And 102, acquiring the coal quality stored in each coal bunker and the coal quantity fed back by the level indicator in real time by the coal blending calculation device.
And 103, combining the target coal quality with the coal quality and the coal quantity of each coal bunker by the coal blending calculation device to analyze coal blending to obtain the coal blending flow parameters of the plurality of coal bunkers.
And 104, screening out the coal blending flow parameter closest to the target coal quality from the coal blending flow parameters of the coal bunkers by the coal blending calculation device to serve as a target coal blending flow parameter, and sending the target coal blending flow parameter to the PLC.
And 105, controlling the opening of the coal bunker gate of each coal bunker to enable coal to flow into the coal mixing belt by the PLC according to the target coal blending flow parameter, and controlling the coal mixing driver to drive the coal mixing belt to mix and output the coal from each coal bunker.
In a specific embodiment, before step 101, the method further includes:
and step A, after the incoming coal is placed at the entrance of the coal inlet belt, a first online coal quality analyzer analyzes the coal quality of the incoming coal, determines the coal quality of the incoming coal, matches the coal storage quality information of the stored coal in each coal bunker, and sends the target coal bunker number of the coal storage quality matched with the coal quality information of the incoming coal to a PLC (programmable logic controller).
And step B, controlling a coal feeding driver by using the PLC to drive a coal feeding belt to convey coal to a target coal bunker.
And step C, monitoring the material level condition in real time by using a material level meter arranged in the target coal bunker, if the material level meter monitors that the target coal bunker is full, calling an empty coal bunker number, sending the empty coal bunker number to a PLC (programmable logic controller), and controlling a coal feeding driver to drive a coal feeding belt to convey coal to an empty coal bunker by using the PLC.
The following process can also be understood colloquially, as shown in fig. 4:
And step 402, judging whether an empty bin exists, if so, entering step 404, and if not, entering step 405.
In step 403, the incoming coal enters a target coal bunker corresponding to the coal quality of the stored coal, and then the process goes to step 406.
At step 404, the incoming coal enters an empty bin and then proceeds to step 406.
In a specific embodiment, the method further comprises:
and 106, the coal blending calculation device acquires the coal quality detected by the second online coal quality analyzer for the mixed coal and compares the coal quality with the target coal quality, if the comparison is successful, the step 107 is executed, and if the comparison is unsuccessful, the step 108 is executed.
And step 107, outputting the mixed coal by using the coal mixing belt.
And 108, the coal blending calculating device performs up-regulation or down-regulation on the coal blending flow parameter of one coal bunker in the coal blending flow parameters of the coal bunkers according to a preset proportion, the second on-line coal quality analyzer is used for detecting the mixed coal, and if the detection is unsuccessful, the coal blending calculating device performs up-regulation or down-regulation on the coal blending flow parameter of the next coal bunker in the coal blending flow parameters of the coal bunkers according to the preset proportion until the coal blending calculating device obtains the coal quality detected by the second on-line coal quality analyzer on the mixed coal and matches the target coal quality.
In the present specification, the embodiments are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same or similar parts in the embodiments are referred to each other.
The description of the present invention has been presented for purposes of illustration and description, and is not intended to be exhaustive or limited to the invention in the form disclosed. Many modifications and variations will be apparent to practitioners skilled in this art. The embodiment was chosen and described in order to best explain the principles of the invention and the practical application, and to enable others of ordinary skill in the art to understand the invention for various embodiments with various modifications as are suited to the particular use contemplated.
Claims (7)
1. A coal blending control system, comprising: the system comprises a coal mixing belt (1), a coal mixing driver (11), a coal blending calculating device (2), a PLC (programmable logic controller) (3), a material level indicator (4) and a coal bunker gate (5);
the coal mixing driver (11), the coal blending calculating device (2) and the coal bunker gates (5) are electrically connected with the PLC (programmable logic controller) (3), the level indicator (4) is electrically connected with the coal blending calculating device (2), the coal blending belt (1) is arranged below outlets of a plurality of coal bunkers, the coal mixing driver (11) is arranged at the bottom of the coal mixing driver (11), the coal bunker gates (5) are arranged at the outlets of the coal bunkers, the coal blending calculating device (2) combines coal quality stored in each coal bunker and coal quantity fed back by the level indicator (4) in real time according to received target coal quality to analyze coal blending to obtain coal blending flow parameters of each coal bunker, the coal blending flow parameters are sent to the PLC (3), the PLC (3) controls the opening degree of the coal bunker gates (5) of each coal bunker to flow into the coal blending belt (1) according to the coal blending flow parameters, the coal mixing driver (11) is controlled to drive the coal mixing belt (1) to mix and output the coal from each coal bunker;
a second on-line coal quality analyzer (14) is arranged at the tail end of the coal blending belt (1), the second on-line coal quality analyzer (14) is electrically connected with the coal blending computing device (2), when the blended coal is conveyed to the tail end by the coal blending belt (1), the second on-line coal quality analyzer (14) detects the coal quality of the blended coal and feeds the detected coal quality back to the coal blending computing device (2) so that the coal blending computing device (2) can compare the detected coal quality with the target coal quality, if the comparison is successful, the blended coal is output by the coal blending belt (1), and if the comparison is unsuccessful, the coal blending is analyzed again until the detected coal quality is successfully compared with the target coal quality;
the system further comprises: the coal feeding device comprises a coal feeding belt (6), a coal feeding driver (61) and a first online coal quality analyzer (64), wherein the coal feeding driver (61) and the first online coal quality analyzer (64) are electrically connected with the PLC (3), the first online coal quality analyzer (64) is arranged at an inlet of the coal feeding belt (6), the coal feeding belt (6) is arranged above bin mouths of a plurality of coal bins, and the coal feeding driver (61) is arranged at the bottom of the coal feeding belt (6);
after incoming coal is placed at the inlet of the coal inlet belt (6), the first online coal quality analyzer (64) analyzes the coal quality of the incoming coal, determines a target coal bunker matched with the coal quality of the incoming coal, and controls the coal inlet driver (61) to drive the incoming coal belt (6) to convey the incoming coal to the target coal bunker by using the PLC (3).
2. The coal blending control system according to claim 1, wherein the coal inlet belt (6) comprises: the coal conveying belt (62) is arranged at a coal inlet, the coal conveying belt (62) is connected with the upper coal belt (63), the coal conveying belt (62) conveys received coal to the upper coal belt (63), and the coal is conveyed to a target coal bunker by the upper coal belt (63).
3. The coal blending control system according to claim 2, wherein a plurality of coal ploughs (631) are arranged on the coal feeding belt (63), each coal plough (631) corresponds to the bin mouth of one coal bin, each coal plough (631) is electrically connected with the PLC controller (3), and the coal ploughs (631) are used for throwing coal into corresponding target coal bins.
4. The coal blending control system according to claim 2, wherein a deviation structure (12) and a belt scale (13) are arranged on each of the coal blending belt (1) and the upper coal belt (63), and a plurality of belt scales (13) are arranged on the coal blending belt (1).
5. The coal blending control system according to claim 1, wherein an air cannon (7) is arranged at the upper part of the outlet of each coal bunker, a vibration coal feeder (8) is arranged at the outlet of the coal bunker, and the vibration coal feeder (8) is arranged above the coal blending belt (1).
6. A coal blending control method based on the coal blending control system of claim 1, comprising:
the coal blending computing device receives input target coal quality;
the coal blending calculation device obtains the coal quality stored in each coal bunker and the coal amount fed back by the level indicator in real time;
the coal blending calculation device combines the target coal quality with the coal quality and the coal quantity of each coal bunker to analyze coal blending to obtain coal blending flow parameters of the plurality of coal bunkers;
the coal blending calculation device screens out a coal blending flow parameter closest to the target coal quality from the coal blending flow parameters of the coal bunkers as a target coal blending flow parameter, and sends the target coal blending flow parameter to the PLC;
the PLC controls the opening of the coal bunker gate of each coal bunker to flow coal into a coal mixing belt according to the target coal blending flow parameter, and controls the coal mixing driver to drive the coal mixing belt to mix and output the coal from each coal bunker;
the coal blending computing device obtains the coal quality detected by the second on-line coal quality analyzer for the mixed coal and compares the coal quality with the target coal quality;
if the comparison is successful, outputting the well-mixed coal by using a coal mixing belt;
if the comparison is unsuccessful, the coal blending calculating device performs up-regulation or down-regulation on the coal blending flow parameter of one coal bunker in the coal blending flow parameters of the coal bunkers according to a preset proportion, the second on-line coal quality analyzer is used for detecting the mixed coal, if the detection is unsuccessful, the coal blending calculating device performs up-regulation or down-regulation on the coal blending flow parameter of the next coal bunker in the coal blending flow parameters of the coal bunkers according to the preset proportion until the coal quality detected by the second on-line coal quality analyzer on the mixed coal is matched with the target coal quality.
7. The coal blending control method according to claim 6, wherein before the coal blending calculation device receives the input target coal quality, the method further comprises:
after the incoming coal is placed at the coal inlet, a first online coal quality analyzer analyzes the coal quality of the incoming coal, determines the coal quality of the incoming coal, matches the coal quality information of the stored coal in each coal bunker, and sends the target coal bunker number of the stored coal quality matched with the coal quality information of the incoming coal to a PLC (programmable logic controller);
the PLC is used for controlling a coal feeding driver to drive a coal feeding belt to convey coal to a target coal bunker;
the material level meter arranged in the target coal bunker is used for monitoring the material level condition in real time, if the material level meter monitors that the target coal bunker is full, an empty coal bunker number is adjusted, the empty coal bunker number is sent to the PLC controller, and the PLC controller controls the coal entering driver to drive the coal entering belt to convey coal to the empty coal bunker.
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Denomination of invention: A coal blending control system and method Effective date of registration: 20220527 Granted publication date: 20201124 Pledgee: Xiamen International Bank Co.,Ltd. Beijing Branch Pledgor: BEIJING YUNHUI INTELLIGENT TECHNOLOGY Co.,Ltd. Registration number: Y2022990000286 |