CN114326563A - Automatic sampling control system for coal as fired - Google Patents
Automatic sampling control system for coal as fired Download PDFInfo
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- CN114326563A CN114326563A CN202111408596.5A CN202111408596A CN114326563A CN 114326563 A CN114326563 A CN 114326563A CN 202111408596 A CN202111408596 A CN 202111408596A CN 114326563 A CN114326563 A CN 114326563A
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Abstract
The invention discloses an automatic sampling control system for coal as fired, which relates to the technical field of coal as fired sampling and comprises a sampling machine system, a PLC (programmable logic controller) control system, an upper computer control system and a packaging system, wherein the automatic sampling control system adopts a distributed control system, the bottom layer is an equipment control layer, the lower layer is a monitoring layer, and the automatic sampling control system comprises a factory side fuel management system. The centralized control room starts and stops the sampling machine through the upper computer; meanwhile, the upper computer is provided with a linkage switch, when the coal conveying belt runs, the linkage switch is put into operation, the sampling system is automatically started, and when the coal conveying belt stops, the sampling system automatically stops; the upper computer is communicated with the PLC of the control cabinet of the sampler, the real-time running state of the sampler is displayed on the upper computer, and when a fault occurs, the picture alarms to remind an operator in time; and uploading the sampling information to a monitoring center server database according to the requirements of a fuel monitoring system, and butting the sampling information with the database interactive table data.
Description
Technical Field
The invention relates to the technical field of coal-fired furnace sampling, in particular to an automatic sampling control system for coal-fired furnace.
Background
2 sets of existing fired coal sampling machines of Huaneng Qufu thermoelectricity Limited company are respectively arranged in the middle of a coal conveying belt. The sampling machine control part adopts a TWido series PLC of Modicon company, and the upper computer is monitoring software independently developed by Qingdao three-energy company; the sample encapsulation System control section used Smart200PLC with collectors of weight-coded canisters of SC58SW-6-20-HTA35-C00, Saymond, Xuzhou. The main problems are as follows:
(1) connection of upper computer and sampling machine PLC
A PCI slot of the host computer is provided with an interface card and is connected with an I/O channel of the PLC in a hard wiring mode;
(2) connection of sampling machine system and packaging system
The sampling machine system sends the operation signal of the material receiving machine to a DI channel of the PLC of the packaging system through a DO channel of the PLC; meanwhile, a DO channel of the system is packaged, and a scalable signal is sent to a DI channel of the sampling system PLC;
(3) the sampling machine system and the packaging system do not completely realize full-automatic control;
(4) the sampling machine system and the packaging system are not connected with the fuel supervision platform;
(5) the sampling machine system and the packaging system have protocols which can not be directly communicated with the fuel monitoring platform, so the invention particularly provides an automatic sampling control system for coal as fired to solve the problems in the background technology.
Disclosure of Invention
The invention aims to solve the defects in the prior art and provides an automatic sampling control system for coal as fired.
In order to achieve the purpose, the invention adopts the following technical scheme:
an automatic sampling control system for coal as fired comprises a sampling machine system, a PLC control system, an upper computer control system and a packaging system, wherein the automatic sampling control system adopts a distributed control system, the bottom layer is an equipment control layer and is used for completing the control and monitoring of field equipment, the lower layer is a monitoring layer and is used for completing the monitoring of the running state of the equipment, the automatic sampling control system comprises a plant side fuel management system, and the plant side fuel management system has a data docking function with the sampling machine system;
the sampling machine system and the packaging system are linked with the belt, the full-section continuous automatic sampling and automatic weighing are realized, the automatic generation of the sampling scheme is realized, the sampling operation of the sampling machine according to the sampling scheme is automatically executed step by step, the samples are encrypted and automatically packaged, the moisture loss is reduced, and the sampling device has the function of automatic statistics of the input rate of the sampling device;
the PLC control system is characterized in that the automatic sampling system control system is configured with and selects an AB company SLC500, is provided with an Ethernet port, can be connected to SMR6310E through a network, and then is connected with an upper control computer through a wireless link through the network;
and the upper computer adopts DELL DEMENSION 310C, and SMR6310 communicates with the lower PLC control system through a wireless Ethernet modem SMR6310E and a special antenna, and the SMR6310 communicates with the lower PLC control system through wireless communication.
Preferably, the starting and stopping of each unit device of the automatic coal mining control system follow a specific sequence, namely, each device is subjected to interlocking control; and meanwhile, the system is interlocked with a belt coal transportation system, when a certain device fails in the process, an alarm signal is sent, all parts after a fault point are subjected to delayed shutdown from the upper stage to the lower stage, all parts before the fault point are shut down simultaneously, and an automatic shutdown protection function is provided under abnormal conditions.
Preferably, the sampling machine system is in butt joint with a plant-side fuel management information system, and the data transmission comprises: sampling time, sampling interval, sampling completion state, the number of actual samples, sample weight, equipment operating condition includes: starting and stopping signals of the sampling machine, sampling frequency of the sampling machine, a sample weighing curve and fault information of the sampling machine.
Preferably, the upper computer control system installs configuration king 6.55 electric power version monitoring software, through HUB, respectively with sampling control system, encapsulation control system and fuel supervisory systems communication, reads the sampling scheme that factory side fuel management system provided, sends sampling system and encapsulation system, and the result of sampling is through the upper computer automatic system of sampling of uploading, and the information of uploading includes sampling weight, sampling point number, equipment operation form.
Preferably, the automatic sampling control system modifies and upgrades the PLC control program part of the original belt-in-furnace sampling machine, and meanwhile, a control interface with an upper computer is added; the packaging control system optimizes the original control logic, feeds back the weighing information of the sample collecting barrel in real time through the interface, and forms a sample weight curve through the factory side fuel management system, so that operators can find equipment faults in time.
Preferably, the program of the PLC control system comprises an initialization program, an action control program of each motor, a crushing, dividing and sample collecting program and an upper computer control program, wherein the program module is composed of different sub-modules, and each sub-module has independent and independent functions and does not interfere with each other, so that the program structure is clear and is convenient to modify.
Preferably, the sampling flow of the sampling machine system specifically includes the following steps:
the method comprises the following steps: inputting information including coal source, batch, nominal maximum granularity and coal variety;
step two: generally analyzing and testing coal samples and moisture coal samples (quality parameters are coal indexes such as ash content, moisture and the like;
step three: and continuously sampling contract or setting required precision, and performing test verification:
step four: inputting or setting required variability parameters, and calculating the number of sampling units and subsamples;
step five: calculating the minimum quality of the total amount and the average minimum quality of the typeface, and determining a sampling mode and a sampling base;
step six: the coal flow comprises moving coal flow and static coal, the sampling mode comprises system sampling and immediate sampling, the sampling base comprises a time base and a quality base, and the position of the final sub-sample is determined according to the reasonable selection of the sampling mode and the sampling base.
Preferably, the quality of the coal to be sampled is greater than that of the initial sampling unit, and the subsample number n of each sampling unit is determined when the sampling units need to be divided;
wherein n is the number of subsamples of each sampling unit; v1Is the primary subsample variance; pL(%) is the total precision of sampling, sample preparation and assay of a batch of coal at a confidence probability of 95%; m is the number of sampling units into which a batch of coal is divided; vPTPreparing a sample and testing variance; d is the difference between two samples of each subsample; n ispIs the number of subsamples; x is the average of duplicate sample measurements for each subsample;
calculate m, V as abovePT、PLCan be set or calculated according to standard set values, V1The variability of the coal needs to be known to determine, so units should be determined according to the variability of the worst coal source when programming the sampling plan.
Preferably, when the automatic sampling control system is configured, the industrial personal computer is accessed to the power plant local area network through the SMR6310E, and shares the database part with the coal transportation process control computer and the power plant MIS system, so that wireless data transmission is realized, and great convenience is brought to equipment management and data analysis.
Compared with the prior art, the invention has the beneficial effects that:
1. the centralized control room starts and stops the sampling machine through the upper computer; meanwhile, the upper computer is provided with a linkage switch, when the coal conveying belt runs, the linkage switch is put into operation, the sampling system is automatically started, and when the coal conveying belt stops, the sampling system automatically stops;
2. the upper computer of the invention is communicated with the PLC of the control cabinet of the sampler, the real-time state of the operation of the sampler is displayed on the upper computer, when a fault occurs, a picture is alarmed, an operator is reminded in time, all parts before the fault point are stopped simultaneously, and the automatic stop protection function is provided under the abnormal condition;
3. according to the requirements of the fuel monitoring system, the invention uploads the sampling information to the monitoring center server database, and is in data butt joint with the database interactive table, thereby bringing great convenience to equipment management and data analysis.
Drawings
FIG. 1 is a schematic diagram of a system flow and data interaction of an automatic sampling control system for coal as fired according to the present invention;
FIG. 2 is a schematic structural diagram of a control principle of an automatic sampling control system for coal as fired according to the present invention;
FIG. 3 is a schematic view of a sampling principle flow of an automatic sampling control system for coal as fired according to the present invention;
FIG. 4 is a schematic control flow diagram of an automatic sampling control system for coal as fired according to the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
Referring to fig. 1-4, an automatic sampling control system for coal as fired adopts a distributed control system, the bottom layer is an equipment control layer to complete the control and monitoring of field equipment, the lower layer is a monitoring layer to complete the monitoring of the running state of the equipment, the automatic sampling control system comprises a factory side fuel management system, the starting and stopping of each unit equipment of the automatic coal mining control system follow a specific sequence, namely, each equipment is subjected to interlocking control; the system is simultaneously linked with a belt coal transportation system, when a certain device fails in the process, an alarm signal is sent out, each part after the failure point is delayed to stop from the upper stage to the lower stage, each part before the failure point is stopped at the same time, and the system has an automatic stop protection function under abnormal conditions;
further, factory side fuel management system possesses and the data butt joint function between the sampler system, and the sampler system docks with factory side fuel management information system, and the transmission data includes: sampling time, sampling interval, sampling completion state, the number of actual samples, sample weight, equipment operating condition includes: starting and stopping signals of the sampling machine, sampling frequency of the sampling machine, a sample weighing curve and fault information of the sampling machine;
furthermore, the sampling machine system and the packaging system are linked with the belt, the full-section continuous automatic sampling and automatic weighing are realized, the automatic generation of the sampling scheme is realized, the sampling machine automatically executes the sampling operation according to the sampling scheme, the samples are encrypted and automatically packaged, the water loss is reduced, the automatic sampling device has the automatic statistical function of the input rate of the sampling device, the packaging control system optimizes the original control logic, the weighing information of the sample collecting barrel is fed back in real time through an interface, a sample weight curve is formed by the factory side fuel management system, the upper computer control system is provided with configuration king 6.55 electric power version monitoring software, the upper computer control system is respectively communicated with the sampling control system, the packaging control system and the fuel supervisory system through the HUB, the sampling scheme provided by the factory side fuel management system is read and sent to the sampling system and the packaging system, and the sampling result is uploaded to the automatic sampling system through the upper computer, the uploaded information comprises sampling weight, sampling number and equipment running state;
furthermore, the PLC control system, the automatic sampling system control system configuration selects AB company SLC500, with Ethernet port, can be connected to SMR6310E through network, and then establishes network connection with the upper control computer through wireless link, the automatic sampling control system partially modifies and upgrades the PLC control program of the original belt sampling machine, and adds control interface with the upper computer, the PLC control system program includes initialization program, motor action control program, crushing, contraction, sample collection program and upper computer control program, the program module is composed of different sub-modules, each sub-module has independent function, and does not interfere with each other, so the program structure is clear, it is convenient to modify, in the design process, the adopted period is to calculate the total sampling times of a ship according to the loading weight of the coal ship and the sample collector capacity of two sampling devices, only the tonnage of the coal ship is needed to be input in the picture during operation, the PLC control program can automatically calculate the sampling period;
furthermore, the upper computer control system adopts DELL DEMENSION 310C, the SMR6310 communicates with a lower PLC control system through a radio Ethernet modem SMR6310E and a special antenna, the SMR6310 adopts wireless communication to carry out communication, and when the automatic sampling control system is configured, the industrial personal computer is accessed into the power plant local area network through the SMR6310E, shares a database part with a coal transportation program control computer and a power plant MIS system, realizes wireless data transmission, and brings great convenience to equipment management and data analysis;
furthermore, the sampling flow of the sampling machine system specifically comprises the following steps:
the method comprises the following steps: inputting information including coal source, batch, nominal maximum granularity and coal variety;
step two: generally analyzing and testing coal samples and moisture coal samples (quality parameters are coal indexes such as ash content, moisture and the like;
step three: and continuously sampling contract or setting required precision, and performing test verification:
step four: inputting or setting required variability parameters, and calculating the number of sampling units and subsamples;
step five: calculating the minimum quality of the total amount and the average minimum quality of the typeface, and determining a sampling mode and a sampling base;
step six: the coal flow comprises a moving coal flow and a static coal, the sampling mode comprises system sampling and immediate sampling, the sampling base comprises a time base and a quality base, and the position of the final sub-sample is determined according to the reasonable selection of the sampling mode and the sampling base;
furthermore, the quality of the coal to be sampled is greater than that of the initial sampling unit, and when the sampling units need to be divided, the subsample number n of each sampling unit is determined;
wherein n is the number of subsamples of each sampling unit; v1Is the primary subsample variance; pL(%) is the total precision of sampling, sample preparation and assay of a batch of coal at a confidence probability of 95%; m is the number of sampling units into which a batch of coal is divided; vPTPreparing a sample and testing variance; d is the difference between two samples of each subsample; n ispIs the number of subsamples; x is the average of duplicate sample measurements for each subsample;
calculate m, V as abovePT、PLCan be set or calculated according to standard set values, V1The variability of the coal needs to be known to determine, so units should be determined according to the variability of the worst coal source when programming the sampling plan.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (9)
1. An automatic sampling control system for as-fired coal comprises a sampling machine system, a PLC control system, an upper computer control system and a packaging system, and is characterized in that the automatic sampling control system adopts a distributed control system, the bottom layer is an equipment control layer, the lower layer is a monitoring layer, and the automatic sampling control system comprises a plant side fuel management system;
the sampling machine system and the packaging system are linked with the belt, the full-section continuous automatic sampling and automatic weighing are realized, the sampling machine automatically executes the sampling operation according to the sampling scheme, and the samples are encrypted and automatically packaged;
the PLC control system is characterized in that the automatic sampling system control system is configured with and selects an AB company SLC500, is provided with an Ethernet port, is connected to an SMR6310E through a network, and is connected with an upper control computer through a wireless link through the network;
and the upper computer adopts DELL DEMENSION 310C, and SMR6310 communicates with the lower PLC control system through a wireless Ethernet modem SMR6310E and a special antenna, and the SMR6310 communicates with the lower PLC control system through wireless communication.
2. The automatic sampling control system for coal as fired according to claim 1, characterized in that the starting and stopping of each unit device of the automatic coal mining control system follow a specific sequence, namely, the devices are controlled in an interlocking manner; and meanwhile, the system is interlocked with a belt coal transportation system, when a certain device fails in the process, an alarm signal is sent, all parts after a fault point are subjected to delayed shutdown from the upper stage to the lower stage, all parts before the fault point are shut down simultaneously, and an automatic shutdown protection function is provided under abnormal conditions.
3. The automatic sampling control system of coal as fired as claimed in claim 1 wherein the sampling machine system interfaces with a plant-side fuel management information system, and the data transmission comprises: sampling time, sampling interval, sampling completion state, the number of actual samples, sample weight, equipment operating condition includes: starting and stopping signals of the sampling machine, sampling frequency of the sampling machine, a sample weighing curve and fault information of the sampling machine.
4. The automatic sampling control system of coal as fired according to claim 1, wherein the upper computer control system is equipped with a monitoring software of 6.55 power version, and the monitoring software is communicated with the sampling control system, the packaging control system and the fuel monitoring system through a HUB respectively, so as to read the sampling scheme provided by the factory side fuel management system and send the sampling scheme to the sampling system and the packaging system, the sampling result is uploaded to the automatic sampling system through the upper computer, and the uploaded information comprises sampling weight, sampling number and equipment operation state.
5. The automatic sampling control system of coal as fired according to claim 1, characterized in that the automatic sampling control system modifies and upgrades the PLC control program part of the original belt sampling machine while adding a control interface with an upper computer; the packaging control system optimizes the original control logic, feeds back the weighing information of the sample collecting barrel in real time through the interface, and a sample weight curve is formed by the factory side fuel management system.
6. The automatic sampling control system of coal as fired according to claim 1, wherein the PLC control system program comprises an initialization program, an operation control program of each motor, a crushing, dividing and sample collecting program and an upper computer control program, the program modules are composed of different sub-modules, and each sub-module has independent and independent functions and does not interfere with each other.
7. The automatic sampling control system of coal as fired according to claim 1, wherein the sampling flow of the sampling machine system specifically comprises the following steps:
the method comprises the following steps: inputting information including coal source, batch, nominal maximum granularity and coal variety;
step two: generally analyzing and testing coal samples and moisture coal samples (quality parameters are coal indexes such as ash content, moisture and the like;
step three: and continuously sampling contract or setting required precision, and performing test verification:
step four: inputting or setting required variability parameters, and calculating the number of sampling units and subsamples;
step five: calculating the minimum quality of the total amount and the average minimum quality of the typeface, and determining a sampling mode and a sampling base;
step six: the coal flow comprises moving coal flow and static coal, the sampling mode comprises system sampling and immediate sampling, the sampling base comprises a time base and a quality base, and the position of the final sub-sample is determined according to the reasonable selection of the sampling mode and the sampling base.
8. The automatic sampling control system of coal as fired according to claim 7, characterized in that the quality of the coal to be sampled is greater than the coal quantity of the initial sampling unit, and when the sampling units need to be divided, the number n of subsamples of each sampling unit is determined;
wherein n is the number of subsamples of each sampling unit; v1Is the primary subsample variance; pL(%) is the total precision of sampling, sample preparation and assay of a batch of coal at a confidence probability of 95%; m is the number of sampling units into which a batch of coal is divided; vPTPreparing a sample and testing variance; d is the difference between two samples of each subsample; n ispIs the number of subsamples; x is the average of duplicate sample measurements for each subsample;
calculate m, V as abovePT、PLCan be set or calculated according to standard set values, V1The variability of the coal needs to be known to determine, so units should be determined according to the variability of the worst coal source when programming the sampling plan.
9. The automatic sampling control system of coal as fired as claimed in claim 1, wherein when the automatic sampling control system is configured, the industrial personal computer is connected to the power plant local area network through SMR6310E, and shares the database part with the coal transportation process control computer and the power plant MIS system, so as to realize wireless data transmission.
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| CN202111408596.5A CN114326563A (en) | 2021-11-19 | 2021-11-19 | Automatic sampling control system for coal as fired |
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| CN202111408596.5A CN114326563A (en) | 2021-11-19 | 2021-11-19 | Automatic sampling control system for coal as fired |
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| CN114326563A true CN114326563A (en) | 2022-04-12 |
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| CN202111408596.5A Pending CN114326563A (en) | 2021-11-19 | 2021-11-19 | Automatic sampling control system for coal as fired |
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