KR102511449B1 - System and method for coal moisture measurement - Google Patents

Abstract

The present disclosure relates to a system and method for measuring moisture in coal. The coal moisture measurement system may include a sampling device that collects a sample from a duct through which powdered coal falls, and a moisture measurement device that measures the moisture content of the sample collected by the sampling device. The sampling device may include a cylinder inserted into the coupling hole of the duct to extract the powdered coal as the sample, and a vacuum pump generating a suction force to extract the sample from inside the cylinder.

Description

Coal moisture measurement system and method {SYSTEM AND METHOD FOR COAL MOISTURE MEASUREMENT}

The present disclosure relates to a system and method for measuring moisture in coal, and more particularly, to a system and method for measuring moisture in coal briquettes during a manufacturing process of coal briquettes.

It is known that the FINEX process has many advantages in terms of fuel use because coal, not coke, is used as input fuel for the smelting furnace. However, if the coal used as fuel is 8mm or less pulverized coal, it is not sufficiently burned in the melting furnace and is collected in the dust collector. If it is excessive, it causes an imbalance in the process and causes problems in operation, so the use of pulverized coal in the steelmaking process is limited. . Currently, in the smelting reduction process, only lump coal with a size of about 8 mm or more can be used. However, since a significant amount of currently used coal for steelmaking is composed of fine powder of 8 mm or less, it is necessary to manufacture coal briquettes that are agglomerated by an appropriate method.

In the coal briquette manufacturing facility used in the FINEX method, powdered coal stored in the yard is supplied to the crusher in a state of containing moisture, and after being crushed by the crusher, the moisture is removed by the coal dryer. Removed. In addition, the powdered coal from which moisture has been removed is mixed with additives such as quicklime and dust and a binder through a mixer, and the mixture thus produced is aged in a kneader and then processed by a briquetting machine. It is compressed and molded into coal briquettes.

The particle size, particle size, moisture content, etc. of powdered coal shredded by the crusher in the coal briquette manufacturing facility are factors that significantly affect the cost of fuel input to the operation of the coal dryer and the quality of the final produced coal briquettes, and thorough management is required.

An object to be solved through an embodiment is to provide a coal moisture measurement system and method for measuring and managing the moisture content of coal in real time in a manufacturing facility for manufacturing coal briquettes used in the FINEX method.

A coal moisture measurement system according to an embodiment for solving the above problems is a sampling device for collecting a sample from a duct, which is a passage through which coal dust falls, and moisture for measuring the moisture content of the sample collected by the sampling device. It may include a measuring device. The sampling device may include a cylinder inserted into the coupling hole of the duct to extract the powdered coal as the sample, and a vacuum pump generating a suction force to extract the sample from inside the cylinder.

The moisture measurement system may further include a hopper for storing the sample sucked through the cylinder, and a quantitative cutting device for regularly cutting out the sample stored in the hopper and loading it into a sample container.

The moisture measuring system may further include a robot device that transfers the sample between the sample container and a plate of the moisture measuring device.

The moisture measurement system may further include a conveyor belt transporting the sample container. The robot device may transport the sample contained in the sample container onto the plate when the sample container is moved from a first position to a second position below the metering cutter by the conveyor belt.

When the moisture measurement of the sample is completed by the moisture measuring device, the robot device may return the sample to the sample container.

The moisture measurement system may further include a sample discharge device configured to discharge the sample contained in the sample container to the duct when the sample container is moved to a third position by the conveyor belt. The conveyor belt may transfer the sample container from the second position to the third position when the sample whose moisture measurement is completed is returned to the sample container by the robot device.

The moisture measuring system may include a plurality of moisture measuring devices. Each of the plurality of moisture measuring devices may measure moisture content of samples collected by the sampling device at different times.

The moisture measuring system may further include a control system that receives measured moisture values from the plurality of moisture measuring devices and obtains an average value of the measured moisture values as the moisture data of the coal.

The hole may be opened only upon insertion of the cylinder.

When sampling is completed, the cylinder may be separated from the hole.

A vibration generator coupled to the cylinder to generate vibration may be further included.

The duct may be located in a path through which the powdered coal crushed by a crusher is dried by a dryer in a coal briquette manufacturing facility and then transported to a storage bin.

In addition, the method for measuring the moisture of coal according to the embodiment includes inserting a cylinder for sampling into a hole formed in a duct through which powdered coal falls, and generating a suction force in the cylinder by a vacuum pump to remove the powdered coal as a sample. Loading the sample collected by the cylinder into a sample container waiting at a first position, by a quantitative cutting device, and loading the sample container by a conveyor belt at a first position below the quantitative cutting device. The step of transferring the sample to a second location, the robot device gripping the sample from the sample container on the second location and transporting the sample to a moisture measuring device, and the step of measuring the moisture content of the sample by the moisture measuring device. can include

The method of measuring moisture includes, when the measurement of the amount of moisture by the moisture measuring device is completed, the robot device returning the sample on the moisture measuring device to the sample container, and the conveyor belt, the sample container The method may further include transferring the sample discharge device from the second location to a third location where the sample discharge device is located.

The method may further include, when the sample container is transferred to the third location, discharging the sample from the sample discharge device contained in the sample container through the duct.

According to the embodiment, in a manufacturing facility for manufacturing coal briquettes used in the FINEX method, the moisture content of coal can be measured in real time, more accurate measurement data can be obtained, and the moisture measurement process can be automated, thereby automating the manager's tasks. burden can be reduced.

1 schematically illustrates an example of a coal briquette manufacturing facility to which a system for measuring moisture in coal according to an embodiment of the present invention is applied.
Figure 2 schematically shows a system for measuring moisture in coal according to an embodiment of the present invention.
3 shows an example of a moisture measuring system according to an embodiment of the present invention.
4A and 4B are diagrams illustrating an example of the sampling device of FIG. 3 .
5 schematically illustrates a method for measuring moisture in coal according to an embodiment of the present invention.

Hereinafter, with reference to the accompanying drawings, embodiments of the present invention will be described in detail so that those skilled in the art can easily carry out the present invention. The present invention may be embodied in many different forms and is not limited to the embodiments set forth herein.

In order to clearly describe the embodiments of the present invention, parts irrelevant to the description are omitted, and the same reference numerals are assigned to the same or similar components throughout the specification.

Throughout the specification, when a part is said to be "connected" to another part, this includes not only the case where it is "directly connected" but also the case where it is "electrically connected" with another element interposed therebetween. .

Hereinafter, a system and method for measuring moisture in coal in a coal briquette manufacturing facility according to an embodiment of the present invention will be described in detail with reference to necessary drawings.

1 schematically illustrates an example of a coal briquette manufacturing facility to which a system for measuring moisture in coal according to an embodiment of the present invention is applied.

In the coal briquette manufacturing facility, powdered coal, which is a main raw material for manufacturing coal briquettes, may be stored in a bin 1 of a yard and then supplied to a crusher 2. The crusher 2 is a device for crushing powdered coal, and the powdered coal crushed by the crusher 2 may be supplied to a coal dryer 3. The coal dryer 3 removes moisture from the powdered coal crushed by the crusher 2 and discharges it, and the powdered coal from which water is removed by the coal dryer 3 is stored in the storage bin 4.

The powdered coal stored in the storage bin 4 may then be primarily mixed with auxiliary materials (eg, quicklime, dust) by a primary mixer 5. The mixture primarily mixed by the primary mixer 5 is transferred to a distribution hopper 6 for secondary mixing.

The distribution hopper 6 distributes the mixture of powdered coal and additives to the secondary mixer 8, which may be secondary mixed with the binder 7 such as starch or molasses by the secondary mixer 8. Then, the mixture secondarily mixed by the secondary mixer 8 is then delivered to a kneader 9, aged for a predetermined time in the kneader 9, and then supplied to a briquetting machine 10. can When the mixture matured by the kneader 9 is supplied, the compression molding machine 10 may compress and mold the mixture into coal briquettes and discharge it. Coal briquettes compressed by the compression molding machine 10 are stored in a curing bin 11 after being cooled, and then supplied to the melting furnace 20 of a FINEX facility to be used for manufacturing molten metal.

The particle size, particle size, moisture content, etc. of powdered coal crushed by the crusher 2 in the above-described coal briquette manufacturing facility are factors that significantly affect the fuel cost input to the operation of the coal dryer 3 and the quality of the final produced coal briquettes. , requires careful management.

In an existing coal briquette manufacturing facility, a non-contact microwave type moisture meter was used while being transported through a conveyor belt to measure the moisture content of powdered coal. However, such a non-contact microwave type moisture meter can only measure the moisture content of the surface portion of the powdered coal, and thus cannot measure the moisture of the powdered coal located at the bottom. Accordingly, whenever a deviation in the moisture content occurs at the top and bottom of the coal pile being transported through the conveyor belt, or when the type of raw material is changed or the mixing ratio is changed, a process of adjusting data consistency through calibration of the moisture meter must be performed. , It is inconvenient for a driver to manually take a sample every predetermined time (eg, 4 hours) and directly measure the moisture, thereby correcting and using the data of the moisture meter.

The system for measuring the moisture of coal according to an embodiment of the present invention is to solve the above-mentioned problems, and collects coal briquette samples during the coal briquette manufacturing process, distributes an appropriate amount of the collected coal samples to a plurality of moisture meters, and The process of discharging the powdered coal sample for which the moisture measurement is completed may be performed automatically.

Figure 2 is a schematic illustration of a coal moisture measurement system according to an embodiment of the present invention, showing the case viewed from the top. In addition, FIG. 3 shows an example of the moisture measurement system of FIG. 2, when viewed from the side.

In the above-described coal briquette manufacturing facility, the powdered coal from which moisture is removed by the coal dryer 3 may be transferred through a transfer device (eg, a bucket conveyor). In addition, powdered coal transported by the conveying device may be charged into the storage bin 4 by vertically falling into the storage bin 4 through a duct (refer to reference numeral 12 in FIG. 2 ) under the conveying device.

2 and 3, the moisture measurement system according to an embodiment of the present invention includes a sample collection device 30, a sample loading device 40, a sample transfer device 50, a robot device 60, and a moisture measurement device. device 70 , sample ejection device 80 , and control system 90 .

The sampling device 30 may be combined with the duct 12 of the coal briquette manufacturing facility to collect powdered coal falling through the duct 12 as a sample. The powdered coal transported through the bucket conveyor is scattered in the process of falling into the storage bin 4 through the duct 12. Therefore, when taking a sample of the powdered coal falling in the duct 12, it is possible to sample the powdered coal positioned at the bottom as well as the top of the pile.

The sampling device 30 may include a drawing cylinder 31 and an aspirator 32 .

The extraction cylinder 31 is a suction pipe for extracting powdered coal falling from the duct 12 as a sample by suction force generated through the suction device 32 . To this end, the duct 12 includes a hole 13 into which the cylinder 31 for extraction is inserted, and the hole 13 is positioned so that powdered coal can be taken out from the middle of the falling object falling inside the duct 12. can be determined.

The aspirator 32 is a device that generates a suction force for sample suction in the take-out cylinder 31, and may include a vacuum pump or the like. The inhaler 32 may generate a suction force to suck powdered coal into the take-out cylinder 31 when sample collection is required, and may stop sample collection by stopping generation of the suction force after sample collection is completed.

When sample collection is required, the sampling device 30 moves the take-out cylinder 31 forward and inserts it into the cylinder coupling hole 13 of the duct 12, and after sample collection is completed, the take-out cylinder 31 It can be separated from the duct 12 by moving backward. Since the duct 12 in the coal briquette manufacturing facility is a passage through which powdered coals move, when the hole 13 is constantly developed, dust caused by coals may flow out of the duct 12 . Therefore, the hole 13 of the duct 12 is formed in the form of a door that can be opened and closed, and is opened only when the cylinder 31 is coupled, and can be closed when the cylinder 31 is uncoupled.

The sampling device 30 may further include an insertion control device 33 as shown in FIGS. 4A and 4B. 4A and 4B are views illustrating an example of the sampling device of FIG. 3 , when the sampling device 30 is viewed from different directions. 4A and 4B, the insertion control device 33 moves the take-out cylinder 31 forward or backward, so that the take-out cylinder 31 is inserted into the hole 13 of the duct 12 or the hole 13 ) can be separated from the cylinder 31.

Immediately before inserting the cylinder 31 into the hole 13 of the duct 12 or immediately after separating the cylinder 31 from the hole 13 of the duct 12, the hole 13 is opened instantaneously and (12) Dust may be leaked to the outside. In order to solve this problem, the sampling device 30 has a space in which the cylinder 31 moves, and a transparent duct (not shown) for guiding the movement of the cylinder 31 to the hole 13 is additionally provided. may also include In this case, the cylinder 31 is inserted into the transparent duct and moved to the hole 13 only when sampling is required, and when sampling is completed, the cylinder 31 may be completely separated from the transparent duct and stand by. When the cylinder 31 is separated, the transparent duct can be closed to prevent dust from escaping.

Again, referring to FIGS. 2 and 3 , the powdered coal sample sucked through the cylinder 31 of the sampling device 30 may be transported to the sample loading device 40 through the aspirator 32 .

The sample loading device 40 is for loading the powdered coal sample collected through the cylinder 31 of the sampling device 30 into the sample container 51, and may include a hopper 41 and a cutting device 42. can

The hopper 41 is a place where the powdered coal sample collected by the sampling device is transported and stored, and the powdered coal sample stored in the hopper 41 can be cut out by the cutting device 42 and loaded into the sample container 51. there is. Here, the cutting device 42 may be a constant feed weigher (CFW). The quantitative cutting device is a cutting device that operates so that the amount of sample to be cut out is constant at one time of cutting.

On the other hand, the remaining powdered coal sample that remains after being cut into the sample container 51 for moisture measurement is discharged from the hopper 41 to a conveyor belt 52 described later, and then the sample discharge device 80 through the conveyor belt 52 can be moved to and discharged.

The sample transfer device 50 transfers the sample container 51 loaded with the powdered sample by the sample loading device 40 to a grip standby position waiting for the grip of the robot device 60, or the robot device ( When the powdered coal sample for which moisture measurement has been completed by 60) is returned to the sample container 51, the sample container 51 may be moved to the side of the sample discharge device 80. To this end, the sample transfer device 50 may include a conveyor belt 52 capable of forward and reverse rotation.

When the sample container 51 is loaded with the powdered sample, the conveyor belt 52 rotates in the forward direction to transport the sample container 51 to a grip waiting position, that is, a position waiting for the grip of the robot device 60. In addition, the conveyor belt 52 may rotate in a reverse direction to transport the sample container 51 toward the sample discharge device 80 when the robot device 60 returns the powdered coal sample whose moisture content has been measured.

The robot device 60 may transport the powdered coal sample accommodated in the sample container 51 on the conveyor belt 52 to a plate of the moisture measuring device 70 . Also, the robot device 60 may return the powdered sample on the plate of the moisture measuring device 70 to the sample container 51 on the conveyor belt 52 again. To this end, the robot device 60 is composed of an articulated robot device and may include a robot arm 61 capable of gripping the powdered sample and holding a certain amount of the powdered sample when gripped once.

The robot arm 61 grips a certain amount of powdered coal sample from the sample container 51 on the conveyor belt 52 and sequentially transports it onto the plate of the moisture measuring device 70 in standby, and the moisture measuring device The sample on the plate may be returned to the sample container 51 by gripping the plate of 70 . When the return of the sample is completed, the robot arm 61 may additionally perform a cleaning operation to remove dust remaining on the grip unit, and then move to a stand-by position for the next transport operation.

Each moisture measuring device 70 is a moisture meter using infrared rays, and when a powdered coal sample is loaded on its own plate, the sample is heated for a predetermined time (eg, 15 minutes) to obtain a moisture content measurement value of the powdered coal sample. there is.

In the moisture measurement system according to the embodiment, the sampling device 30 collects samples at intervals of a predetermined time (eg, 5 minutes), and the sample loading device 40 collects a newly collected sample every time sampling proceeds. A sample is loaded into the sample container 51, and the conveyor belt 52 may transport it to a grip standby position. In addition, the robot arm 61 transports the gripped sample from the sample container 51 to the waiting moisture measuring device 70 whenever the sample container 51 is transferred to the grip standby position, and the corresponding moisture measuring device ( 70) may measure the moisture content by heating the sample for a predetermined time (eg, 15 minutes). While one moisture measuring device 70 measures moisture in this way, the moisture measuring system transports a newly collected sample to the moisture measuring device 70 in standby in the following order, and the moisture measuring device 70 When the moisture measurement starts, the plurality of moisture measuring devices 70 may operate to measure the moisture of the samples taken at different times by transporting the newly collected sample to another moisture measuring device. In addition, while one moisture measuring device 70 is performing moisture measurement, the robot device 60 is operated to collect a sample from another moisture measuring device 70 that has completed moisture measurement and return it to the sample container 51. You can do it.

In the above-described manner, the moisture content measurement values measured at predetermined time intervals by the plurality of moisture measurement devices 70 are transmitted to the control system 90 through wired/wireless communication, and can be used to obtain moisture content data of powdered coal later. .

The sample discharge device 80 may discharge the powdered coal samples for which moisture measurement has been completed to the duct 12 again. The sample discharge device 80 is located in the opposite direction to the robot device 60 based on the conveyor belt 52, and when the sample container 51 is transferred to the discharge position through the conveyor belt 52, the sample container 51 ) can be discharged into the duct 12 through the discharge pipe 81. The sample container 51, after discharging the powdered sample through the sample discharge device 80, may be moved by the conveyor belt 52 to a loading waiting position, that is, below the sample loading device 40, and wait for sample loading. An operation of discharging the powdered coal sample accommodated in the sample container 51 to the sample discharging device 80 and returning the empty sample container 51 onto the conveyor belt 52 may be performed by a mechanical device.

The control system 90 may control the overall operation of the moisture measurement system.

When the moisture measurement procedure is initiated, the control system 90 operates the insertion control device 33 of the sampling device 30 to insert the extraction cylinder 31 into the hole 13 of the duct 12 for sampling. You can control it. In addition, the control system 90 may automatically open the hole 13 by adjusting a gate (not shown) or the like so that the cylinder 31 can be inserted into the hole 13 of the duct 12 . When the cylinder 31 is inserted into the duct 12, the control system 90 may control the inhaler 32 to generate a suction force so as to take out powdered coal falling in the duct 12 as a sample.

Thereafter, when sampling of the sampling device 30 is completed, the control system 90 may control the insertion control device 33 of the sampling device 30 so that the cylinder 31 is separated from the duct 12. there is. In addition, the control system 90 may close the hole 13 by adjusting a gate or the like to prevent the leakage of dust into the duct 12 .

Meanwhile, the control system 90 moves the cylinder 31 to the duct 12 only when the production volume of the coal briquette manufacturing facility, which is the main facility, and the air pressure for the suction operation of the inhaler 32 satisfy predetermined conditions. to initiate the moisture determination procedure.

When the powdered coal sample collected by the sampling device 30 is transported to the sample loading device 40, the control system 90 controls the cutting device 42 to cut a certain amount of powdered coal sample into the sample container 51. You can control it. At this time, the control system 90 may adjust the rotation of the conveyor belt 52 so that the sample container 51 is located under the cutting device 42 .

The control system 90 controls the rotation of the conveyor belt 52 to transport the sample container 51 containing the powdered sample to the grip standby position when the sample container 51 is cut out by the cutting device 42. can do. In addition, when the control system 90 completes the moisture measurement in the specific moisture measuring device 70 and returns the powdered sample to the sample container 51, the conveyor belt 52 moves the sample container 51 to the discharge position. ) can also be controlled.

The control system 90 may control the movement, posture, and gripping motion of the robot device 60 . When the sample container 51 is moved to the grip standby position, the control system 90 controls the robot device 60 to transport the powdered sample accommodated in the sample container 51 on the conveyor belt 52 to the plate of the moisture measuring device 70. ) can be controlled. In addition, when the moisture measurement of the specific moisture measuring device 70 is completed, the control system 90 returns the powdered sample on the plate of the moisture measuring device 70 to the sample container 51 on the conveyor belt 52 again. The robot device 60 can also be controlled.

The control system 90 may also receive measured values of the moisture content of the powdered coal samples from the plurality of moisture measuring devices 70, respectively, and may obtain data on the moisture content, that is, the moisture content of the powdered coal based on these values. For example, the control system 90 may obtain the moisture content data of the coal by calculating an average value of the moisture content measurement values measured by the plurality of moisture measuring devices 70 . Since the plurality of moisture measuring devices 70 measure the moisture of powdered coal samples collected at different times at predetermined time intervals (eg, 5 minutes), the moisture content measurement values measured by the plurality of moisture measuring devices 70 The average value may correspond to the average moisture content of coal for a predetermined period of time.

When the moisture content data is acquired, the control system 90 may display it on a display (not shown) when the moisture content data of the coal is obtained.

The control system 90 described above may operate in an automatic mode or a manual mode.

In the automatic mode, the control system 90 takes a sample from the duct 12 every predetermined time (eg, 5 minutes) via the sampling device 30, and the sample loading device 40 and the sample transport device ( 50) is transferred to the grip standby position of the robot device 60, the sample transported to the grip standby position through the robot device 60 is transported to one of the moisture measuring devices 70, and the moisture measuring device The moisture content of the sample is measured through 70, the sample whose moisture content has been measured is transported back to the grip standby position through the robot device 60, and the sample returned through the sample transport device 50 is sampled. Each device can be controlled so that a series of tasks discharged through the discharge device 80 are automatically performed according to a predetermined schedule.

The manual mode is a mode for testing facilities, and in the manual mode, the control system 90 may individually activate/deactivate the operation of each device based on a control input from an operator.

Due to the nature of the moisture measuring system, which must be located adjacent to the coal briquette manufacturing facility, work can be performed in a dusty environment. Such dust may cause failure of the control system 90 and may adversely affect the health of a worker operating the control system 90 . Accordingly, the control system 90 may be located in the transparent booth and spatially separated from the coal briquette manufacturing facility. In addition, air conditioning equipment (not shown) is installed in the transparent booth to keep the positive pressure inside the booth constant (for example, to generate a differential pressure of about 0.5 to 1.5 mmH2O between booths) to prevent dust from entering the booth. can block

Due to the nature of powdered coal that is easily scattered, when an exposure type sampling device such as a spoon type is used to take out a sample of powdered coal briquettes, a large amount of powdered coal may scatter to the surroundings during the sample movement process. In addition, in the process of collecting powdered coal in a vertical fall, the collecting device can be easily damaged by the weight and impact of the falling powdered coal, and when the debris of the broken collecting device is mixed with the powdered coal, it may cause problems in a later process. Accordingly, in the moisture measuring system according to an embodiment of the present invention, a suction force is generated inside the cylinder 31 through a suction device 32 such as a vacuum pump, and the falling coal is instantly sucked using this suction force to obtain a sample. can be harvested In addition, since the collected coal samples can be automatically transported to the sample loading device 40 through a pipe, contamination of the surrounding environment by dust during the sampling process can be prevented as much as possible.

When a person approaches within the movement radius of the robot device 60, there may be a risk of injury due to the robot arm 61. Thus, in the robot device 60 according to the embodiment, access of the operator may be restricted by a blocking door (not shown). The blocking door may be made of a transparent material such as glass so that the robot device 60 can be monitored. The opening and closing of the blocking door may be controlled through manipulation of an opening and closing device, for example, a door switch (not shown). The door switch is equipped with a safety switch (or interlock device) to which a sensor for detecting the opening and closing of the blocking door is connected, and the robot device 60 recognizes the opening of the blocking door through the sensor when the safety switch is released, can be stopped automatically. In addition, the control system 90 may detect the opening of the blocking door through a sensor when the safety switch is released, and output an alarm through an output device such as a display. Meanwhile, the robot device 60 automatically stopped due to the opening of the blocking door can be restarted only after returning the safety switch to the state before opening and instructing the robot device 60 to be restarted by an operation button installed in the field. Through these facilities, the moisture measurement system according to the embodiment can fundamentally block the risk of field workers being injured by the robot device 60 .

On the other hand, the sample collection cylinder 31 of the sample collection device 30, the pipe through which the collected sample is delivered to the sample loading device 40, and the sample discharge pipe 81 of the sample discharge device 80, etc. Attachment of powdered coal to the inner space may occur due to the viscosity and moisture contained in the powdered coal they transport. Accordingly, the moisture measurement system includes a sample collection cylinder 31, a pipe through which the sample collected from the cylinder 31 is transferred to the sample loading device 40, or a sample discharge pipe 81 of the sample discharge device 80. It may further include one or more vibration generators (not shown) mounted thereon. The vibration generator may be mounted on a corresponding pipe (or cylinder) to generate a vibration signal so that powdered coal attached to the inside of the corresponding pipe (or cylinder) can be separated from the inner wall by vibration.

The control system 90 of the above-described moisture measurement system is implemented with a central processing unit (CPU), digital signal processing (DSP), application specific integrated circuit (ASIC), programmable logic controller (PLC), microprocessor, other chipsets, etc. It includes one or more processors, and functions of the control system 90 described above may be executed by the processor.

5 schematically illustrates a method for measuring moisture in coal according to an embodiment of the present invention. The moisture measurement method of FIG. 5 may be performed by the control system 90 of the moisture measurement system described above with reference to FIGS. 1 to 4B.

Referring to FIG. 5, when the moisture measurement procedure is initiated, the control system 90 waits for the sample container 51 at the sample loading position (S10), and dusts the inside of the duct 12 through the sampling device 30. A sample is taken (S11).

In step S11, the control system 90 controls the sampling device 30 to insert the extraction cylinder 31 into the hole 13 of the duct 12 for sampling, and the sampling device 30 By driving the inhaler 32 of the powdered coal sample can be collected.

When sampling by the sampling device 30 is completed, the control system 90 controls the sample loading device 40 to load a certain amount of powdered coal sample into the sample container 51 (S12).

In the step S12, the control system 90, when the sample collected by the sampling device 30 is accommodated in the hopper 41 of the sample loading device 40, the cutting device 42 under the hopper 41 By controlling, a predetermined amount of powdered coal sample inside the hopper 41 can be cut into the sample container 51 .

When the sample loading is completed, the control system 90 controls the sample transport device 50 to transport the sample container 51 to the grip standby position (S13). In addition, when the sample container 51 is moved to the grip standby position, the control system 90 controls the robot device 60 to transport the powdered coal sample accommodated in the sample container 51 to the plate of the moisture measuring device 70. (S14).

As the powdered coal sample is transported to its own plate, the corresponding moisture measurement device 70 obtains a moisture measurement value from the corresponding sample and transmits it to the control system 90 through wired or wireless communication. Accordingly, the control system 90 acquires the moisture measurement result of the sample in real time through the moisture measuring device 70 (S15).

Meanwhile, when the moisture measuring operation of the moisture measuring device 70 is completed, the control system 90 controls the robot device 60 to return the sample measured by the moisture measuring device 70 to the sample container 51. (S16). In addition, the control system 90 controls the sample transport device 50 to move the sample container 51 containing the returned sample to the sample discharge device 80 side (S17). Thereafter, the control system 90 controls the sample transport device 50 to discharge the sample contained in the sample container 51 to the sample discharge device 80 (S18), and moves the discharged sample container 51 to the loading position. By moving to , the next sample loading is standby.

The control system 90 may repeatedly perform the above-described steps S10 to S18 until the moisture measurement procedure ends. Accordingly, the moisture measuring system may monitor moisture data of the coal briquettes in real time while the coal briquette manufacturing facility is operating.

The drawings and detailed description of the present invention referred to so far are only examples of the present invention, which are only used for the purpose of explaining the present invention, and are used to limit the scope of the present invention described in the meaning or claims. It is not. Therefore, those skilled in the art can easily select and replace them. In addition, those skilled in the art may omit some of the components described in this specification without deteriorating performance or add components to improve performance. In addition, those skilled in the art may change the order of the method steps described herein according to the process environment or equipment. Accordingly, the scope of the present invention is to be determined by the claims and equivalents thereof, rather than by the described embodiments.

12: duct
13: hall
30: sampling device
31: cylinder
32: inhaler
33: insertion control device
40: sample loading device
41 Hopper
42: cutting device
50: sample transfer device
51: sample container
52: conveyor belt
60: robot device
61: robotic arm
70: moisture measuring device
80: sample discharge device
81: discharge piping
90: control system

Claims (15)

As a system for measuring moisture in coal,
A sampling device for collecting a sample from a duct through which powdered coal falls;
A moisture measuring device for measuring the moisture content of the sample collected by the sampling device, and
And a robot device for transporting a sample between a sample container into which the sample collected by the sampling device is loaded and a plate of the moisture measuring device,
The sampling device,
A cylinder inserted into the coupling hole of the duct to take out the powdered coal as the sample, and
A vacuum pump generating a suction force for taking out the sample from the inside of the cylinder,
The robot device returns the sample to the sample container when the moisture measurement of the sample is completed by the moisture measuring device.
moisture measurement system According to claim 1,
A hopper for storing the sample sucked through the cylinder, and
The moisture measurement system further comprising a quantitative cutting device for loading the sample stored in the hopper into the sample container by constantly cutting it out. delete According to claim 2,
Further comprising a conveyor belt for transporting the sample container,
The robot device conveys the sample contained in the sample container onto the plate when the sample container is moved from the first position to the second position below the quantitative cutting device by the conveyor belt. delete According to claim 4,
When the sample container is moved to a third position by the conveyor belt, it further comprises a sample discharge device for discharging the sample contained in the sample container to the duct,
The conveyor belt transfers the sample container from the second position to the third position when the sample whose moisture measurement is completed is returned to the sample container by the robot device. According to claim 1,
The moisture measuring system includes a plurality of moisture measuring devices,
Wherein each of the plurality of moisture measuring devices measures the amount of moisture in samples collected by the sampling device at different times. According to claim 7,
The moisture measurement system further comprises a control system that receives moisture measurement values from the plurality of moisture measurement devices and obtains an average value of the moisture measurement values as moisture data of the coal. According to claim 1,
The moisture measuring system, wherein the hole is opened only when the cylinder is inserted. According to claim 9,
The cylinder is separated from the hole when sampling is completed, the moisture measuring system. According to claim 9,
Further comprising a vibration generator coupled to the cylinder to generate vibration. According to claim 1,
The duct is
In a coal briquette manufacturing facility, a moisture measuring system positioned on a path in which the powdered coals crushed by a crusher are dried by a dryer and then transported to a storage bin. As a method for measuring moisture in coal,
Inserting a cylinder for sampling into a hole formed in a duct through which powdered coal falls;
Collecting the powdered coal as a sample by a vacuum pump generating a suction force inside the cylinder;
Loading, by the quantitative cutting device, the sample collected by the cylinder into a sample container waiting at a first position;
Transferring, by a conveyor belt, the sample container from a first position to a second position under the metering cutter;
A robotic device gripping and transporting the sample from the sample container on the second position to a moisture measuring device;
Measuring, by the moisture measuring device, the moisture content of the sample;
Returning, by the robot device, the sample on the moisture measuring device to the sample container when the measurement of the moisture content by the moisture measuring device is completed; and
and transferring, by the conveyor belt, the sample container from the second location to a third location where a sample discharge device is located. delete According to claim 13,
When the sample container is transferred to the third position, the sample discharge device contained in the sample container further comprises the step of discharging the sample into the duct.

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