CN115420901A - Control method and device of thermal raw material decomposition rate analysis equipment - Google Patents
Control method and device of thermal raw material decomposition rate analysis equipment Download PDFInfo
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- CN115420901A CN115420901A CN202211076486.8A CN202211076486A CN115420901A CN 115420901 A CN115420901 A CN 115420901A CN 202211076486 A CN202211076486 A CN 202211076486A CN 115420901 A CN115420901 A CN 115420901A
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- G01N35/00584—Control arrangements for automatic analysers
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N5/00—Analysing materials by weighing, e.g. weighing small particles separated from a gas or liquid
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Abstract
The invention discloses a control method and a device of thermal raw material decomposition rate analysis equipment, wherein the control method comprises the steps of starting an automatic sampling cooling system, and automatically taking sufficient materials from a blanking pipe at regular time and cooling the materials; the control weighing module weighs idle crucible, the material that will obtain is sent to once dosing mechanism and secondary dosing mechanism in proper order, send the capacity material into the crucible of connecing the material position after the secondary ration, the control weighing module is weighed the crucible of carrying the material, then remove the crucible of carrying the material and burn to the muffle furnace, send crucible and residual material among them to cooling waiting position cooling after the firing, monitor that residual material fully cools down the back rethread weighing module through the sensor and weigh, scrape the clearance that the ash removal device carries out residual material to the crucible in the control automation, let equipment reset, and PLC calculates this sample hot raw material decomposition rate, update database and statement. The invention realizes the automatic detection and calculation of the decomposition rate of the hot raw material and can obtain a relatively reliable detection result.
Description
Technical Field
The invention belongs to the technical field of industrial automation, and particularly relates to a control method and a control device of thermal raw material decomposition rate analysis equipment.
Background
The production process comprises six relatively independent process links of crushing homogenization, raw material preparation homogenization, raw material preheating and decomposition, clinker calcination cooling, coal powder preparation and cement grinding. Wherein, the comprehensive index reflecting the quality, efficiency and safety of the raw material decomposition process is the decomposition rate of the hot raw material, which is the percentage of carbonate in the total carbonate decomposed into oxide after the raw material passes through a decomposing furnace and a preheater C5. The detection of the ignition loss is a key link for obtaining the decomposition rate of the hot raw material, and refers to the loss of the amount of crystal water, CO2 decomposed from carbonate, SO2 decomposed from sulfate and organic impurities discharged in the process of firing the blank.
The method comprises six links of sampling, cooling, weighing, firing, re-weighing and calculating, and most factories in the cement industry still adopt a manual mode to finish the process at present. The specific implementation steps are that a post worker samples once from a blank ban to a feeding pipe of a five-stage preheater every day by using a special sampling spoon, the samples are manually transported to a laboratory, after the samples are cooled to room temperature, 1g of samples (with the precision of 0.0001 g) are weighed and placed in a ceramic crucible which is burnt to constant weight, then the samples are placed in a high-temperature furnace at 900-950 ℃ for burning for 40min, the crucible is taken out and placed in a dryer to be cooled to room temperature, and then the samples are weighed. And (4) calculating the weighed results to obtain the ignition loss of the hot raw materials, and finally calculating the decomposition rate of the hot raw materials by combining the calculation result of the ignition loss of the raw materials fed into the kiln.
According to the process, the existing manual sampling, manual inspection, manual operation and manual recording of the decomposition rate of the hot raw materials are realized, the representativeness of the sampling and the real-time property of sample detection are difficult to guarantee, the problems of low working efficiency, lagging detection results, insufficient process standardization degree and the like exist, some automatic devices for automatic quantitative sampling by suction exist in the prior art for realizing online detection, the automation is realized in the sampling link, but the subsequent weighing, firing, re-weighing, calculation and other links do not exist and are closely connected with the sampling link, and the method for fully automatically completing the whole detection process in the online detection process and the control device for controlling the corresponding devices to complete the detection are realized.
Disclosure of Invention
The invention aims to provide a control method of thermal raw material decomposition rate analysis equipment, which is used for solving the technical problems that the equipment cannot be controlled in the prior art to realize full-automatic continuous operation of each link of thermal raw material decomposition rate detection and realize full-automatic thermal raw material decomposition rate detection.
The control method of the thermal raw material decomposition rate analysis equipment comprises an automatic sampling and cooling system, a primary quantifying mechanism, a secondary quantifying mechanism, a clamp transferring mechanism, a weighing module, a muffle furnace and an automatic scraping and dust removing device, wherein the automatic sampling and cooling system is connected with a feeding pipe of a five-stage preheating tower of a cement plant, the automatic sampling and cooling system is connected with the primary quantifying mechanism through a hose, the primary quantifying mechanism is used for preliminarily quantifying the powder which is automatically taken out, the secondary quantifying mechanism is used for accurately quantifying the preliminarily quantified powder, the secondary quantifying mechanism is connected with the primary quantifying mechanism through a channel provided with a vibrating motor, the clamp transferring mechanism is located on the front side of the secondary quantifying mechanism and is used for transferring the powder after accurate quantification, the muffle furnace and the weighing module are respectively located on the left side and the right side of the clamp transferring mechanism, the weighing module is used for weighing the powder after accurate quantification and removing the dust of the burnt residual material, the muffle furnace is used for weighing the powder after the weighing module, and the automatic scraping and dust removing device is located on the front side of the clamp transferring mechanism and is used for cleaning a crucible and cleaning the residual material in the clamp and the residual material removing device.
The control method comprises the following steps: starting an automatic sampling cooling system, and automatically taking sufficient materials from a blanking pipe at regular time and cooling the materials; the method comprises the steps of controlling a weighing module to weigh an idle crucible, sequentially conveying obtained materials to a primary quantifying mechanism and a secondary quantifying mechanism, controlling the primary quantifying mechanism and the secondary quantifying mechanism to act, conveying the obtained sufficient materials with specified volumes into a crucible at a material receiving position after secondary quantifying, controlling the weighing module to weigh a material-carrying crucible, then moving the material-carrying crucible to a muffle furnace for firing, conveying the crucible and residual materials in the crucible to a cooling waiting position for cooling after firing, monitoring the residual materials through a sensor, fully cooling, then weighing through a weighing module, controlling an automatic material scraping and ash removing device to clean the crucible, resetting the idle crucible and a clamp transfer mechanism, calculating the decomposition rate of the sampled hot raw materials by a PLC, and updating a database and a report.
Preferably, in the online mode, the control method includes the steps of:
s10, starting an automatic sampling cooling system, and automatically taking out sufficient materials from a blanking pipe at regular time and cooling the materials;
s20, after the automatic sampling and cooling system is started, the clamp transfer mechanism moves the idle crucible to the weighing position of the electronic balance of the weighing module, and the weight m1 of the crucible is read to the PLC;
S30, waiting for the automatic sampling and cooling system to deliver the obtained materials to a primary quantifying mechanism;
s40, the primary quantitative mechanism acts to convey sufficient materials with specified volume into the secondary quantitative mechanism;
s50, starting a vibration motor when the materials are conveyed to a secondary quantitative mechanism to ensure smooth conveying of the materials from primary quantification to secondary quantification;
s60, actuating a secondary quantifying mechanism to send enough materials with specified volume into a crucible at a material receiving position;
s70, moving the crucible carrying the materials to an electronic balance weighing position by a clamp transfer mechanism, and reading the whole weight m2 to a PLC;
s80, moving the crucible carrying the materials to a muffle furnace by the clamp transfer mechanism, and firing according to preset firing time;
s90, after firing is finished, moving the fired crucible to a cooling waiting position by the clamp transfer mechanism;
s100, monitoring the temperature of the crucible in real time by a sensor, moving the crucible to a weighing position of an electronic balance by a clamp transfer mechanism after the residual material is sufficiently cooled, and reading the weight m3 of the fired crucible to a PLC (programmable logic controller);
s110, moving the crucible to a crucible cleaning position by a clamp transfer mechanism, and cleaning residual materials after firing the crucible by a scraping mechanism of the automatic scraping and ash removing device;
s120, the crucible is moved to an initial crucible storage position by the clamp transfer mechanism, and then the clamp returns to the initial position;
S130, a residual material returning mechanism of the automatic material scraping and ash removing device acts to clean residual materials in the equipment and return the residual materials to the original production flow;
s140, the PLC calculates the decomposition rate of the hot raw material sampled at this time, and updates a database and a report;
and S150, returning to the step S10, and waiting for the next flow to start.
Preferably, the step S140 includes:
s141, calculating the loss on ignition C5los of the C5 thermal raw material according to the results of weighing three times, wherein the weight m1 of the empty crucible, the total weight m2 of the crucible before ignition and the sample, and the total weight m3 of the crucible after ignition and the sample are as follows:
C5loss＝(m2-m3)/ml*100；
s142, manually inputting the loss of burning Floss of raw materials entering the kiln;
s143, calculating the decomposition rate of the C5 thermal raw material, wherein the formula is as follows:
decomposition rate =1- (C5 loss (100-Floss))/(Floss (100-C5 loss))/(100).
Preferably, the step S80 includes:
s81, before transferring and firing the crucible by the clamp transferring mechanism, judging the state of the muffle furnace, if the furnace temperature does not reach a set firing temperature threshold value or another crucible in the furnace is firing, temporarily storing the crucible in an initial crucible storage position by the clamp transferring mechanism, waiting for the firing condition to be met, and otherwise, executing the next step;
s82, if the firing condition is met, the muffle furnace rod rises to open the opening;
s83, the clamp transfer mechanism moves the material-carrying crucible to the position of a supporting platform at the lower end of a muffle furnace rod;
S84, loosening the crucible by the clamp transfer mechanism, and moving to a safe position;
s85, lowering the muffle furnace rod until the opening is completely sealed;
and S86, starting to burn until the preset burning time is reached.
Preferably, the automatic sampling cooling system comprises a sampling motor, a sampling cylinder, a sampler, a cooling fan and a conveying motor; the step S10 includes:
s11, starting sampling when the timer reaches the preset sampling starting time;
s12, synchronously starting a cooling fan and a conveying motor;
s13, the sampling motor extends into the C5 chute.
S14, retracting a sampling cylinder, and pumping hot raw materials to an outlet of a sampler;
s15, repeating the step S14 for a plurality of times until enough materials are obtained;
s16, moving a sampling motor out of the C5 chute;
s17, keeping the cooling fan and the conveying motor to operate until all the obtained samples are conveyed to downstream analysis equipment;
and S18, stopping the cooling fan and the conveying motor, and returning to the step S11.
The present invention also provides a control apparatus for a thermal raw meal decomposition rate analyzing device, comprising a PLC storing a computer program for the control method for a thermal raw meal decomposition rate analyzing device as described above.
Preferably, the control device further comprises an I/O module, a touch screen, a servo controller, a brushless motor driver, an electronic balance communication module, a temperature control meter communication module, a solid-state relay, an integrated bus type electromagnetic valve island and a plurality of sensors, wherein the I/O module is connected with the PLC through a backplane plug-in, a driving end of the brushless motor driver is connected with the DO module, an output end of the brushless motor driver is connected with the brushless dc motor, a driving end of the solid-state relay is connected with the temperature control meter, an output end of the solid-state relay is connected with a main loop of the muffle furnace, and the servo controller, the brushless motor driver, the electronic balance communication module, the integrated bus type electromagnetic valve island, the temperature control meter communication module, the solid-state relay and the plurality of sensors are all communicated with the PLC through a PROFINET bus in the same subnet.
Preferably, the servo controller is used for moving the linear module driven by the servo motor in the horizontal and vertical directions; the brushless motor driver is used for driving the vibration motor and the automatic scraping and ash-removing device; the electronic balance communication module is used for reading the balance state and the weighing data from the electronic balance to the PLC, and issuing zero clearing, peeling and calibration instructions to the electronic balance from the PLC; the temperature control meter and the communication module are used for controlling the working temperature and the heating rate of the muffle furnace and reading real-time temperature data to the PLC; the solid relay is used for controlling a muffle furnace heating main loop, receiving a signal of the temperature control meter and outputting voltage for heating an electric furnace wire; the integrated bus type electromagnetic valve island is used for driving various cylinders in equipment and connecting and disconnecting compressed air.
Preferably, the I/O module is used for collecting digital quantity input signals and analog quantity input signals and outputting the driving signals for driving the brushless motor and lifting the muffle furnace rod.
The invention has the following advantages: the method and the device continuously realize the detection steps of sampling, cooling, weighing, firing, re-weighing and calculating each link by controlling each component of the thermal raw material decomposition rate analysis equipment to operate in order, realize automatic sampling through the sampling step in the process, avoid the influence of potential safety hazards caused by a preheater on personnel, realize accurate quantification of sample collection amount in the automatic detection process through secondary quantification, realize the firing process of the sample through automation, avoid safety risks possibly encountered by manual operation, determine the material quality before and after firing by utilizing multiple measurements, and realize the automatic calculation of the thermal raw material decomposition rate by combining the physical quantity information collected in the operation process of the equipment to obtain a relatively reliable detection result. The whole process not only realizes full automation, but also can effectively ensure the reliability of the data used by calculation.
Drawings
Fig. 1 is a diagram showing the control relationship of the control method of the thermal raw meal decomposition rate analyzing apparatus of the present invention to each part of the apparatus.
Fig. 2 is a diagram showing the relationship between the mode of implementation and the system function switching of the control device of the thermal raw meal decomposition rate analyzing apparatus according to the present invention.
Fig. 3 and 4 are schematic structural views of a thermal raw material decomposition rate analyzing apparatus applied to the present invention.
Reference is made to the accompanying drawings in which: 10. the device comprises a device shell, 20 parts of a primary quantifying mechanism, 30 parts of a secondary quantifying mechanism, 40 parts of a clamp transferring mechanism, 50 parts of a weighing module, 60 parts of a muffle furnace, 70 parts of an automatic scraping and ash removing device.
Detailed Description
The following detailed description of the present invention will be given in conjunction with the accompanying drawings, for a more complete and accurate understanding of the inventive concept and technical solutions of the present invention by those skilled in the art.
As shown in fig. 1 to 4, the present invention provides a control method of a thermal raw material decomposition rate analyzing apparatus including an automatic sampling cooling system, a primary weighing mechanism 20, a secondary weighing mechanism 30, a jig transferring mechanism 40, a weighing module 50, a muffle furnace 60, and an automatic scraping ash removal device 70; automatic sample cooling system links to each other by the welded mode with cement plant five-stage preheating tower unloading pipe, automatic sample cooling system passes through the hose and links to each other with a dosing mechanism 20, analytical equipment's equipment shell 10 is the box structure, the box frame has in the equipment shell 10, a dosing mechanism 20 is fixed with equipment shell 10, muffle furnace 60 is fixed with the box frame, the automatic transportation module is fixed with the box frame, automatic weighing module 50 is fixed with the box frame, secondary dosing mechanism 30 is fixed with the box frame, the material cup is temporarily deposited the position and is fixed with the box frame.
The primary quantifying mechanism 20 is used for preliminarily quantifying the automatically taken powder, the secondary quantifying mechanism 30 is used for accurately quantifying the preliminarily quantified powder, the clamp transferring mechanism 40 is positioned on the front side of the secondary quantifying mechanism 30 and used for transferring the powder after the accurate quantification, the muffle 60 and the weighing module 50 are respectively positioned on the left side and the right side of the clamp transferring mechanism 40, the weighing module 50 is used for weighing the powder after the accurate quantification and the residual material after ignition, the muffle 60 is used for ignition, the weighing module 50 weighs the powder, and the automatic material scraping and ash removing device 70 is positioned on the front side of the clamp transferring mechanism 40 and used for cleaning a crucible in the clamp transferring mechanism 40. The crucibles may be arranged in two in the apparatus, alternately serving as carriers for the hot raw meal.
The control method includes the following steps.
And S10, starting an automatic sampling cooling system, and automatically taking out sufficient materials from the blanking pipe at regular time and cooling.
S20, after the automatic sampling cooling system is started, the clamp transfer mechanism 40 moves the idle crucible to the weighing position of the electronic balance of the weighing module 50, and the weight m1 of the crucible is read to the PLC.
S30, waiting for the automatic sampling and cooling system to deliver the obtained materials to the primary quantifying mechanism 20.
And S40, the primary quantitative mechanism 20 acts to convey enough materials with specified volume into the secondary quantitative mechanism 30.
S50, starting a vibration motor when the materials are conveyed to the secondary quantitative mechanism 30, and ensuring smooth conveying from the primary quantitative to the secondary quantitative materials. The vibration motor is arranged at a passage for conveying materials to the secondary quantifying mechanism 30.
And S60, the secondary quantitative mechanism 30 acts to send enough materials with specified volume into the crucible at the material receiving position.
S70, the clamp transfer mechanism 40 moves the crucible carrying the materials to the weighing position of the electronic balance, and the whole weight m2 is read to the PLC.
S80, the clamp transfer mechanism 40 moves the crucible carrying the materials to the muffle furnace 60, and the materials are burned according to preset burning time.
S90, after the burning is finished, the clamp transfer mechanism 40 moves the burned crucible to a cooling waiting position.
S100, the sensor monitors the temperature of the crucible in real time, after the residual materials are sufficiently cooled, the clamp transfer mechanism 40 moves the crucible to the weighing position of the electronic balance, and the weight m3 of the fired crucible is read to the PLC.
S110, the clamp transfer mechanism 40 moves the crucible to a crucible cleaning position, and the scraping mechanism of the automatic scraping and ash-removing device 70 cleans residual materials burned by the crucible.
S120, the clamp transfer mechanism 40 moves the crucible to an initial crucible storage position, and then the clamp returns to the initial position.
S130, the residual material returning mechanism (a part of the automatic material scraping and ash removing device 70) acts to clean the residual materials in the equipment and return the residual materials to the original production flow.
And S140, the PLC calculates the decomposition rate of the hot raw material sampled at this time, and updates a database and a report.
And S150, returning to the step S10, and waiting for the next flow to start.
In the above steps, the automatic sampling cooling system comprises a sampling motor, a sampling cylinder, a sampler, a cooling fan and a conveying motor. The specific control steps of the automatic sampling cooling system are as follows.
And S11, the timer reaches the preset sampling starting time, and sampling is started.
And S12, synchronously starting the cooling fan and the conveying motor.
S13, the sampling motor extends into the C5 chute.
S14, retracting the sampling cylinder, and pumping the hot raw material to an outlet of the sampler.
And S15, repeating the step S14 for a plurality of times until enough materials are obtained.
And S16, moving the sampling motor out of the C5 chute.
S17, keeping the cooling fan and the conveying motor to operate until all the obtained samples are conveyed to downstream analysis equipment.
And S18, stopping the cooling fan and the conveying motor, and returning to the step S11.
Step S80, the step of burning the hot raw material comprises the following substeps.
S81, before the crucible is transferred and burned by the clamp transfer mechanism 40, the state of the muffle furnace 60 is judged firstly, if the furnace temperature does not reach a set burning temperature threshold (such as 950 +/-25 ℃) or another crucible is burning in the furnace, the clamp transfer mechanism 40 temporarily stores the crucible in an initial crucible storage position to wait for meeting burning conditions; otherwise, the next step is executed.
S82, if the burning condition is met, the furnace rod of the muffle furnace 60 is lifted to open the opening.
S83, the clamp transferring mechanism 40 moves the material loading crucible to the position of a supporting platform at the lower end of a furnace rod of the muffle furnace 60.
S84, the clamp transferring mechanism 40 releases the crucible and moves to a safe position.
S85, lowering the muffle 60 furnace rod until the opening is completely sealed.
S86, starting to burn until the preset burning time is reached.
The specific step of calculating the thermal green stock decomposition rate in step 140 includes.
S141, calculating the loss on ignition C5los of the C5 thermal raw material according to the three weighing results, wherein the weight m1 of the empty crucible, the total weight m2 of the crucible before ignition and the sample, and the total weight m3 of the crucible after ignition and the sample are as follows:
C5loss＝(m2-m3)/m1*100。
and S142, manually recording the loss of burning Floss of the raw materials entering the kiln.
S143, calculating the decomposition rate of the C5 hot raw material, wherein the formula is as follows:
decomposition rate =1- (C5 loss (100-Floss))/(Floss (100-C5 loss))/(100).
The control method realizes the control of the thermal raw material decomposition rate analysis equipment in an online mode, at the moment, the control device controls the thermal raw material decomposition rate analysis equipment to automatically execute the working procedures of sampling, cooling, quantifying, weighing, firing, cooling, weighing and the like, and finally, the generated decomposition rate calculation result is displayed on the touch screen interface in a report form.
The control method also has an off-line mode, and in the automatic flow execution process in the on-line mode, the on-line mode is terminated due to equipment abnormity, faults and forced human intervention, and the system is switched to the off-line mode; in the off-line mode, the equipment is in a stop state, a user can inspect and maintain structural components in the equipment, and the control system opens functions of parameter setting, servo teaching, inching of an actuating mechanism and the like for the user.
Under the state that the control system has no fault warning information, the system mode can be switched from an off-line mode to an on-line mode, at the moment, the control system enters an initialization process, a series of self-checking and resetting instructions are sent to equipment, and finally the control system enters a standby state under the on-line mode. The system function and mode switching relationship in each control mode is shown in fig. 2.
The invention also provides a control device for realizing the control method, which comprises a PLC, an I/O module, a touch screen, a servo controller, a brushless motor driver, an electronic balance communication module, a temperature control meter communication module, a solid-state relay, an integrated bus type electromagnetic valve island, various sensors and the like. The PLC is stored with a computer program for realizing the control method.
The I/O module in the device is connected with the PLC through the backboard plug-in, the drive end of the brushless motor driver is connected with the DO module, the output end of the brushless motor driver is connected with the brushless direct current motor, the drive end of the solid-state relay is connected with the temperature control meter, the output end of the solid-state relay is connected with the main loop of the muffle furnace 60, and other devices are connected into the switch through network cables and communicate through a PROFINET bus in the same subnet.
The PLC is used as the brain of the control device and is mainly used for servo, brushless driving, electronic scale communication, temperature control meter communication and valve island bus module communication, and is used for realizing the functions of instruction issuing, operation and storage of decomposition rate process data, action time sequence management of each movable part of equipment, abnormal state management of the equipment and the like.
The I/O module is used for collecting digital quantity input signals such as a magnetic switch and an emergency stop signal and analog quantity input signals such as temperature and the like and outputting driving signals such as brushless motor driving and muffle furnace 60 furnace rod lifting.
The touch screen is used for displaying the running state of the equipment, displaying the report information of the decomposition rate, displaying the report of the decomposition rate, warning and prompting the abnormality of the equipment, setting the running parameters of the equipment and performing component jog operation in an off-line mode.
The servo controller is used for moving the linear module driven by the servo motor in the horizontal and vertical directions.
The brushless motor driver is used for driving the vibration motor and the scraping device (part of the automatic scraping and dust removing device 70).
The electronic balance communication module is used for reading balance state and weighing data from the electronic balance to the PLC, and issuing zero clearing, peeling and calibrating instructions to the electronic balance from the PLC.
The temperature control meter and the communication module are used for controlling the working temperature and the heating rate of the muffle furnace 60 and reading real-time temperature data to the PLC.
The solid-state relay is used for controlling a heating main loop of the muffle furnace 60, receiving a 4-20mA signal of the temperature control meter and outputting a voltage of 0-220VAC for heating an electric furnace wire.
The integrated bus type electromagnetic valve island is used for driving various cylinders in equipment and connecting and disconnecting compressed air.
The invention is described above with reference to the accompanying drawings, it is obvious that the specific implementation of the invention is not limited by the above-mentioned manner, and it is within the scope of the invention to adopt various insubstantial modifications of the inventive concept and solution of the invention, or to apply the inventive concept and solution directly to other applications without modification.
Claims (9)
1. A control method of a thermal raw material decomposition rate analyzing apparatus, characterized in that: the analysis equipment for the decomposition rate of the hot raw materials comprises an automatic sampling and cooling system, a primary quantifying mechanism (20), a secondary quantifying mechanism (30), a clamp transfer mechanism (40), a weighing module (50), a muffle furnace (60) and an automatic material scraping and ash removing device (70), wherein the automatic sampling and cooling system is connected with a feeding pipe of a five-stage preheating tower of a cement plant, the automatic sampling and cooling system is connected with the primary quantifying mechanism (20) through a hose, the primary quantifying mechanism (20) is used for primarily quantifying the powder which is automatically taken out, the secondary quantifying mechanism (30) is used for accurately quantifying the powder which is primarily quantified, the secondary quantifying mechanism (30) is connected with the primary quantifying mechanism (20) through a channel provided with a vibration motor, the clamp transfer mechanism (40) is positioned on the front side of the secondary quantifying mechanism (30) and used for transferring the powder which is accurately quantified, the muffle furnace (60) and the weighing module (50) are respectively positioned on the left side and the right side of the clamp transfer mechanism (40), the weighing module (50) is used for weighing the powder which is accurately quantified and the residual material in the crucible furnace (60), and the automatic material scraping and ash removing device (70) which is positioned in the crucible furnace transfer mechanism (40);
The control method comprises the following steps: starting an automatic sampling cooling system, and automatically taking sufficient materials out of the blanking pipe at regular time and cooling; the method comprises the steps of controlling a weighing module (50) to weigh idle crucibles, sequentially conveying obtained materials to a primary quantifying mechanism (20) and a secondary quantifying mechanism (30), controlling the primary quantifying mechanism (20) and the secondary quantifying mechanism (30) to act, conveying the obtained sufficient materials with specified volumes into crucibles at material receiving positions after secondary quantifying, controlling the weighing module (50) to weigh the loaded crucibles, then moving the loaded crucibles to a muffle furnace (60) to burn, conveying the crucibles and residual materials in the crucibles to a cooling waiting position to cool after burning, monitoring the residual materials by a sensor, then weighing by the weighing module (50), controlling an automatic material scraping and dust removing device (70) to clean the residual materials of the crucibles, enabling the idle crucibles and a clamp transferring mechanism (40) to reset, calculating by a PLC (programmable logic controller) to obtain the decomposition rate of the sampled hot raw materials, and updating a database and a report.
2. The control method of a thermal raw meal decomposition rate analyzing apparatus according to claim 1, characterized in that: in the online mode, the control method comprises the following steps:
S10, starting an automatic sampling cooling system, and automatically taking out sufficient materials from a blanking pipe at regular time and cooling;
s20, after the automatic sampling cooling system is started, the clamp transfer mechanism (40) moves the idle crucible to the electronic balance weighing position of the weighing module (50), and the weight m1 of the crucible is read to the PLC;
s30, waiting for the automatic sampling and cooling system to convey the obtained materials to a primary quantifying mechanism (20);
s40, the primary quantitative mechanism (20) acts to send enough materials with specified volume into the secondary quantitative mechanism (30);
s50, starting a vibration motor when the materials are conveyed to the secondary quantitative mechanism (30) to ensure smooth conveying from the primary quantitative to the secondary quantitative materials;
s60, actuating a secondary quantitative mechanism (30) to send sufficient materials with specified volume into a crucible at a material receiving position;
s70, moving the crucible carrying the materials to an electronic balance weighing position by a clamp transfer mechanism (40), and reading the whole weight m2 to a PLC (programmable logic controller);
s80, moving the crucible carrying the materials to a muffle furnace (60) by a clamp transfer mechanism (40), and burning according to preset burning time;
s90, after the firing is finished, the fired crucible is moved to a cooling waiting position by the clamp transfer mechanism (40);
s100, monitoring the temperature of the crucible in real time by a sensor, moving the crucible to a weighing position of an electronic balance by a clamp transfer mechanism (40) after the residual material is sufficiently cooled, and reading the weight m3 of the fired crucible to a PLC (programmable logic controller);
S110, moving the crucible to a crucible cleaning position by using a clamp transfer mechanism (40), and cleaning residual materials after the crucible is burnt by using a scraping mechanism of an automatic scraping and ash removing device (70);
s120, the crucible is moved to an initial crucible storage position by the clamp transfer mechanism (40), and then the clamp returns to the initial position;
s130, a residual material returning mechanism of the automatic material scraping and ash removing device (70) acts to clean residual materials in the equipment and return the residual materials to the original production flow;
s140, the PLC calculates the decomposition rate of the sampled hot raw material, and updates a database and a report;
and S150, returning to the step S10, and waiting for the next flow to start.
3. The control method of a thermal raw meal decomposition rate analyzing apparatus according to claim 2, characterized in that: the step S140 includes:
s141, calculating the loss on ignition C5los of the C5 thermal raw material according to the results of weighing three times, wherein the weight m1 of the empty crucible, the total weight m2 of the crucible before ignition and the sample, and the total weight m3 of the crucible after ignition and the sample are as follows:
C5loss＝(m2-m3)/m1*100；
s142, manually inputting the loss of burning Floss of raw materials entering the kiln;
s143, calculating the decomposition rate of the C5 hot raw material, wherein the formula is as follows:
decomposition rate =1- (C5 loss (100-Floss))/(Floss (100-C5 loss))/(100).
4. The control method of a thermal raw meal decomposition rate analyzing apparatus according to claim 2, characterized in that: the step S80 includes:
S81, before transferring and burning the crucible, the clamp transferring mechanism (40) judges the state of the muffle furnace (60) firstly, if the furnace temperature does not reach a set burning temperature threshold value or another crucible in the furnace is burning, the clamp transferring mechanism (40) temporarily stores the crucible in an initial crucible storage position, waits for the burning condition to be met, and otherwise, executes the next step;
s82, if the burning condition is met, the furnace rod of the muffle furnace (60) rises to open the opening;
s83, the clamp transfer mechanism (40) moves the material-carrying crucible to the position of a supporting table at the lower end of a furnace rod of the muffle furnace (60);
s84, loosening the crucible by the clamp transferring mechanism (40) and moving to a safe position;
s85, lowering a furnace rod of the muffle furnace (60) until the opening is completely sealed;
s86, starting to burn until the preset burning time is reached.
5. The control method of a thermal raw meal decomposition rate analyzing apparatus according to claim 2, characterized in that: the automatic sampling and cooling system comprises a sampling motor, a sampling cylinder, a sampler, a cooling fan and a conveying motor; the step S10 includes:
s11, starting sampling when the timer reaches the preset sampling starting time;
s12, synchronously starting a cooling fan and a conveying motor;
and S13, extending a sampling motor into the C5 chute.
S14, retracting a sampling cylinder, and pumping hot raw materials to an outlet of a sampler;
S15, repeating the step S14 for a plurality of times until enough materials are obtained;
s16, moving the sampling motor out of the C5 chute;
s17, keeping the cooling fan and the conveying motor to operate until all the obtained samples are conveyed to downstream analysis equipment;
and S18, stopping the cooling fan and the conveying motor, and returning to the step S11.
6. A control device for a thermal raw material decomposition rate analyzing apparatus, characterized in that: comprising a PLC storing a computer program for implementing the control method of the hot raw meal decomposition rate analysis apparatus according to any one of claims 1 to 5.
7. The control device of a thermal raw meal decomposition rate analyzing apparatus according to claim 6, characterized in that: the intelligent electronic balance is characterized by further comprising an I/O module, a touch screen, a servo controller, a brushless motor driver, an electronic balance communication module, a temperature control meter communication module, a solid-state relay, an integrated bus type electromagnetic valve island and a plurality of sensors, wherein the I/O module is connected with the PLC through a backboard plug-in, a driving end of the brushless motor driver is connected with the DO module, an output end of the brushless motor driver is connected with the brushless direct current motor, a driving end of the solid-state relay is connected with the temperature control meter, an output end of the solid-state relay is connected with a main loop of a muffle furnace (60), and the servo controller, the brushless motor driver, the electronic communication module, the integrated bus type electromagnetic valve island, the temperature control meter communication module, the solid-state relay and the plurality of sensors are all communicated with the PLC through a PROFINET bus in the same subnet.
8. The control device of a thermal raw meal decomposition rate analyzing apparatus according to claim 7, characterized in that: the servo controller is used for the linear module driven by the servo motor to move in the horizontal and vertical directions; the brushless motor driver is used for driving the vibration motor and the automatic material scraping and ash removing device (70); the electronic balance communication module is used for reading the balance state and the weighing data from the electronic balance to the PLC, and issuing zero clearing, peeling and calibration instructions to the electronic balance from the PLC; the temperature control meter and communication module is used for controlling the working temperature and the heating rate of the muffle furnace (60) and reading real-time temperature data to the PLC; the solid relay is used for controlling a heating main loop of the muffle furnace (60), receiving a signal of the temperature control meter and outputting voltage for heating an electric furnace wire; the integrated bus type electromagnetic valve island is used for driving various cylinders in equipment and connecting and disconnecting compressed air.
9. The control apparatus of a thermal raw meal decomposition rate analyzing device according to claim 8, characterized in that: the I/O module is used for collecting digital quantity input signals and analog quantity input signals and outputting the driving signals for driving the brushless motor and lifting the furnace rod of the muffle furnace (60).
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116465781A (en) * | 2023-04-07 | 2023-07-21 | 上海朴维自控科技有限公司 | Electrophoretic paint adding system, method and online analysis system thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116465781A (en) * | 2023-04-07 | 2023-07-21 | 上海朴维自控科技有限公司 | Electrophoretic paint adding system, method and online analysis system thereof |
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