KR20220086060A - System and method for coal moisture measurement - Google Patents

Abstract

The present disclosure relates to a system for measuring moisture in coal and a method therefor. The coal moisture measuring system may include a sampling device for collecting a sample from a duct that is a passage through which the powdered coal falls, and a moisture measuring device for measuring the amount of moisture in the sample collected by the sample collecting device. The sampling device may include a cylinder inserted into the coupling hole of the duct to take out the powdered coal as the sample, and a vacuum pump to generate a suction force for taking out the sample from the inside of the cylinder.

Description

Coal moisture measurement system and method

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

In the FINEX process, coal, not coke, is used as the input fuel for the furnace, so it is known to have many advantages in terms of fuel use. However, if the coal used as fuel is pulverized coal of 8 mm or less, it cannot be sufficiently burned in the melting furnace and is collected in the dust collector. . Currently, in the smelting reduction ironmaking process, only bulk coal with a size of about 8 mm or larger can be used. However, since a significant amount of coal for ironmaking currently used 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 briquettes manufacturing facility used in the FINEX method, the 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. is removed Then, the powdered coal from which moisture has been removed is mixed with auxiliary materials such as quicklime and dust and a binder through a mixer, and the resulting mixture is aged in a kneader and then compressed by a briquetting machine. It is compression molded and manufactured into coal briquettes.

The particle size, particle size, moisture content, etc. of the coal briquettes crushed by the crusher in the coal briquettes manufacturing facility are factors that significantly affect the fuel cost input to the operation of the coal drier and the quality of the final produced coal briquettes, and require thorough management.

An object to be solved through the 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.

Coal moisture measuring system according to an embodiment for solving the above problems, a sample collecting device for collecting a sample from a duct that is a passage through which the powdered coal falls, and moisture for measuring the amount of moisture in the sample collected by the sample collecting device It may include a measuring device. The sampling device may include a cylinder inserted into the coupling hole of the duct to take out the powdered coal as the sample, and a vacuum pump to generate a suction force for taking out the sample from the inside of the cylinder.

The moisture measuring system may further include a hopper for storing the sample sucked through the cylinder, and a quantitative cutting device for constantly 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 for transporting a sample between the sample container and a plate of the moisture measuring device.

The moisture measuring system may further include a conveyor belt for 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 the first position under the quantitative extraction device to the second position 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 measuring system may further include a sample discharging device configured to discharge the sample contained in the sample container to the duct when the sample container is moved to the 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 for which moisture measurement has been 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 the moisture content of the samples collected by the sample collecting devices at different time points.

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

The hole can be opened only when the cylinder is inserted.

The cylinder may be separated from the hole when sampling is completed.

It may further include a vibration generator for generating vibration by being coupled to the cylinder.

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

In addition, the method for measuring moisture in coal according to an embodiment includes the steps of inserting a cylinder for sampling into a hole formed in a duct that is a passage through which the powdered coal falls, a vacuum pump generates a suction force inside the cylinder to sample the powdered coal and loading the sample collected by the cylinder into a sample container waiting at a first position by the quantitative extraction device, and a conveyor belt moving the sample container to a first position below the quantitative extraction device. transferring the sample to a second position, the robot device gripping the sample from the sample container on the second position and transporting the sample to a moisture measuring device, and the moisture measuring device measuring the moisture content of the sample may include

In the moisture measuring method, when the measurement of the moisture content is completed by the moisture measuring device, the robot device returns the sample on the moisture measuring device to the sample container, and the conveyor belt includes the sample container The method may further include transferring from the second position to a third position where the sample discharging device is located.

The method may further include, when the sample container is transferred to the third position, discharging the sample into the duct by the sample discharging device contained in the sample container.

According to an 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 manager's job by automating the moisture measurement process can reduce the burden.

1 schematically shows an example of a coal briquettes manufacturing facility to which a system for measuring coal moisture according to an embodiment of the present invention is applied.
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 measurement 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 of ordinary skill in the art to which the present invention pertains can easily implement them. The present invention may be embodied in several different forms and is not limited to the embodiments described herein.

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

Throughout the specification, when a part is "connected" with another part, this includes not only the case of being "directly connected" but also the case of being "electrically connected" with another element interposed therebetween. .

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

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

In a 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 the powdered coal, and the powdered coal crushed by the crusher 2 may be supplied to the coal dryer 3 . The coal dryer 3 removes moisture from the crushed coal from the crusher 2 and discharges it, and the powdered coal from which moisture 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 first mixed with auxiliary raw materials (eg, quicklime, dust) by a primary mixer 5 . The mixture firstly 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 auxiliary materials to the secondary mixer 8 , and these may be secondary mixed with the binder 7 such as starch and molasses by the secondary mixer 8 . Then, the mixture secondarily mixed by the secondary mixer 8 is then transferred to the kneader 9, aged in the kneader 9 for a predetermined time, and then supplied to the Briquetting Machine 10. can When the mixture aged by the kneader 9 is supplied to the compression molding machine 10, it may be compressed and discharged into coal briquettes. The coal briquettes compression-molded by the compression molding machine 10 may be stored in a drying bin 11 after cooling, 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 the 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 drier 3 and the quality of the finally produced coal briquettes. , requires careful management.

In the existing coal briquettes manufacturing facility, in order to measure the moisture content of the powdered coal, a non-contact microwave type moisture meter was used while being conveyed through a conveyor belt. However, since this non-contact microwave type moisture meter can measure only the moisture content of the surface portion of the powdered coal, there is a problem in that it is impossible to measure the moisture of the powdered coal located below. Accordingly, whenever there is a deviation in the moisture content in the upper and lower parts of the coal pile being transported through the conveyor belt, or whenever the coal type of raw material is changed or the mixing ratio is changed, the process of matching data consistency through calibration of the moisture meter must be performed. , there is a hassle in that the driver has to manually take a sample every predetermined time (eg, 4 hours) and use the moisture meter by correcting the moisture meter by directly measuring the moisture.

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

Figure 2 schematically shows a system for measuring moisture in coal according to an embodiment of the present invention, and shows a case viewed from the top. In addition, FIG. 3 shows an example of the moisture measuring system of FIG. 2 , and shows a case in which it is viewed from the side.

In the above-described coal briquettes manufacturing facility, the powdered coal from which moisture has been removed by the coal dryer 3 may be conveyed through a conveying device (eg, a bucket conveyer). In addition, the 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 ) of the lower portion of the conveying device.

2 and 3 , the moisture measuring system according to an embodiment of the present invention includes a sample collecting device 30 , a sample loading device 40 , a sample transport device 50 , a robot device 60 , and moisture measurement It may include a device 70 , a sample extraction device 80 , and a control system 90 .

The sampling device 30 may be combined with the duct 12 of the coal briquettes manufacturing facility to collect the powdered coal falling through the duct 12 as a sample. The powdered coal transferred through the bucket conveyor is scattered in the process of falling to the storage bin 4 through the duct 12 . Therefore, when collecting the powdered coal falling in the duct 12 as a sample, it is possible to sample the powdered coal located in the lower part as well as the upper part of the coal pile.

The sampling device 30 may include a cylinder 31 for taking out, and an inhaler 32 .

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

The aspirator 32 is a device for generating a suction force for sucking a sample in the extraction cylinder 31 , and may include a vacuum pump or the like. When sample collection is required, the inhaler 32 may generate a suction force for sucking the powdered coal into the extraction cylinder 31 , and stop generating the suction force after the sample collection is completed to stop sample collection.

When sample collection is required, the sampling device 30 moves the extraction cylinder 31 forward and inserts it into the cylinder coupling hole 13 of the duct 12, and after the sampling is completed, the extraction cylinder 31 can be separated from the duct 12 by moving backward. Since the duct 12 in the coal briquettes manufacturing facility is a passage through which the powdered coal moves, when the hole 13 is constantly developed, the dust from the coal briquettes may flow out of the duct 12 . Accordingly, 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 coupling of the cylinder 31 is released.

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 , and are views of the sampling device 30 as viewed from different directions. 4A and 4B , the insertion control device 33 inserts the take-out cylinder 31 into the hole 13 of the duct 12 by moving the take-out cylinder 31 forward or backward, or the hole 13 ) can be separated from the cylinder (31).

Immediately after 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 momentarily opened and the duct (12) Dust may leak to the outside. In order to solve this problem, the sample collection 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 include In this case, the cylinder 31 is inserted into the transparent duct only when sampling is required and moves to the hole 13, and when the sampling is completed, it can be completely separated from the transparent duct and wait. When the cylinder 31 is separated, the transparent duct can be closed to prevent the dust from leaking out.

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 inhaler 32 .

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

The hopper 41 is a place where the powder sample collected by the sampling device is transported and stored, and the powder sample stored in the hopper 41 may be cut out by the cutting device 42 and loaded into the sample container 51 . have. 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 at one time is constant.

On the other hand, the remaining powdered coal sample cut out from the sample container 51 for moisture measurement is discharged from the hopper 41 to a conveyor belt 52 to be described later, and then the sample discharging device 80 through the conveyor belt 52 . It can be discharged by moving to

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 a grip of the robot device 60, or the robot device ( When the powdered coal sample whose moisture measurement has been completed by 60 ) is returned to the sample container 51 , the sample container 51 may be moved toward the sample discharging device 80 . To this end, the sample transfer device 50 may include a conveyor belt 52 capable of forward and reverse rotation.

When the powdered sample is loaded into the sample container 51 , the conveyor belt 52 may rotate in a forward direction to transport the sample container 51 to a grip standby position, that is, to a position in which the robot device 60 waits for a grip. In addition, when a powdered coal sample whose moisture measurement has been completed by the robot device 60 is returned, the conveyor belt 52 may rotate in a reverse direction to transfer the sample container 51 to the sample discharging device 80 .

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 powder sample on the plate of the moisture measuring device 70 back to the sample container 51 on the conveyor belt 52 . To this end, the robot device 60 is configured as a multi-joint robot device, and may include a robot arm 61 capable of gripping a powder sample and having a constant amount of powder sample gripped at one time.

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

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

In the moisture measurement system according to the embodiment, the sample collection device 30 collects a sample at a predetermined time (eg, 5 minutes) interval, and the sample loading device 40 collects a newly collected sample each time the sample collection proceeds. The sample may be loaded into the sample container 51 , and the conveyor belt 52 may transport it to the grip standby position. Also, whenever the sample container 51 is transferred to the grip standby position, the robot arm 61 transports the gripped sample from the sample container 51 to the waiting moisture measuring device 70, and the corresponding moisture measuring device ( 70) may measure the moisture content by heating the sample for a predetermined time (eg, 15 minutes). In this way, while one moisture measuring device 70 measures moisture in this way, the moisture measuring system transports a newly collected sample to the waiting moisture measuring device 70 in the next order, and the moisture measuring device 70 When the moisture measurement is started, the plurality of moisture measurement devices 70 may operate to measure moisture with respect to the samples collected at different times by transferring the newly collected sample to another moisture measuring device. In addition, while one moisture measuring device 70 performs moisture measurement, the robot device 60 is operated to recover a sample from the other moisture measuring device 70 that has completed moisture measurement and return it to the sample container 51 . can do it

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

The sample discharging device 80 may discharge the powdered coal samples for which moisture measurement is completed again to the duct 12 . The sample discharging device 80 is positioned in the opposite direction to the robot device 60 with respect to the conveyor belt 52 , and when the sample vessel 51 is transferred to the discharging position through the conveyor belt 52 , the sample vessel 51 ) may be discharged into the duct 12 through the discharge pipe 81 of the coal sample accommodated in the. The sample container 51 discharging the powdered sample to the sample discharging device 80 may be moved to a loading standby position, that is, a lower portion of the sample loading device 40 by the conveyor belt 52 to wait for loading of the sample. The operation of discharging the powder 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 started, the control system 90 controls 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. can be controlled In addition, the control system 90 may automatically open the hole 13 by adjusting a gate (not shown) 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 suction force so as to take out the powdered coal falling in the duct 12 as a sample.

Thereafter, when the 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 . have. In addition, the control system 90 may close the hole 13 by adjusting a gate or the like in order to prevent the dust outflow in the duct 12 .

On the other hand, the control system 90 operates the cylinder 31 to the duct 12 only when the production amount of the coal briquettes manufacturing facility, which is the main facility, the pressure of the air for the suction operation of the inhaler 32, etc. meet predetermined conditions. can be inserted to initiate the moisture measurement procedure.

When the powder sample collected by the sampling device 30 is transferred to the sample loading device 40 , the control system 90 controls the extraction device 42 to cut out a predetermined amount of the powder sample into the sample container 51 . can be controlled At this time, the control system 90 may adjust the rotation of the conveyor belt 52 so that the sample container 51 is located below 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 powdered sample is cut out from the sample container 51 by the cutting device 42 . can do. In addition, when the moisture measurement in the specific moisture measuring device 70 is completed and the powdered sample is returned to the sample container 51, the control system 90 controls the conveyor belt 52 to move the sample container 51 to the discharge position. ) can also be controlled.

The control system 90 may control the movement, posture, and grip operation of the robot device 60 . When the sample container 51 is moved to the grip standby position, the control system 90 transports the powder sample accommodated in the sample container 51 on the conveyor belt 52 to the plate of the moisture measuring device 70 to the robot device 60 . ) 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 coal sample on the plate of the corresponding moisture measuring device 70 back to the sample container 51 on the conveyor belt 52 . It is also possible to control the robot device 60 .

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

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

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

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

The manual mode is a mode for testing equipment. In the manual mode, the control system 90 can individually activate/deactivate the operation of each device based on a control input input from an operator.

Due to the nature of the moisture measuring system, which must be located adjacent to the coal briquettes manufacturing facility, work can be done in a dusty environment. Such dust may cause a failure of the control system 90 , and may adversely affect the health of an operator who operates the control system 90 . Accordingly, the control system 90 may be located in the transparent booth and spatially separated from the coal briquettes manufacturing facility. In addition, by installing an air conditioning facility (not shown) in the transparent booth to keep the positive pressure in the booth constant (for example, to generate a differential pressure of about 0.5 to 1.5 mmH2O between booths), it is possible to prevent dust from entering the booth. can be blocked

Due to the nature of the powder that is easily scattered, if an exposed extraction device such as a spoon type is used to take a sample of the coal briquettes, a large amount of powdered coal may be scattered around during the sample movement process. In addition, the harvesting device may be easily damaged by the weight and falling impact of the falling coal in the process of collecting the powdered coal that is falling vertically, and if the remains of the damaged collecting device are mixed with the powdered coal, it may cause a problem in the subsequent 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 the suction device 32 such as a vacuum pump, and the falling coal is instantaneously sucked using this suction power to collect the sample. can be harvested In addition, the powdered coal sample collected in this way may be automatically transferred to the sample loading device 40 through a pipe, so that it is possible to maximally prevent contamination of the surrounding environment by dust during the sampling process.

When a person approaches within the movement radius of the robot device 60 , there may be a risk of injury by the robot arm 61 . Accordingly, in the robot device 60 according to the embodiment, an operator's access may be restricted by a blocking door (not shown). The blocking door may be made of a transparent material such as glass to enable monitoring of the robot device 60 . Opening and closing of the blocking door may be controlled through an opening/closing operation device, for example, a door switch (not shown). This door switch is equipped with a safety switch (or interlock device) connected to a sensor that detects the opening and closing of the blocking door, and the robot device 60 recognizes the opening of the blocking door through the sensor when the safety switch is released, It can be stopped automatically. In addition, when the safety switch is released, the control system 90 may detect the opening of the blocking door through a sensor and output an alarm through an output device such as a display. On the other hand, the robot device 60, which is 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 restart by the operation button installed in the field. Through these facilities, the moisture measuring system according to the embodiment may fundamentally block the risk of being injured by the field worker 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 transferred to the sample loading device 40, and the sample discharge pipe 81 of the sample discharge device 80, etc. The adhesion of the powdered coal to the internal space may occur due to the viscosity of the powdered coal they carry and the moisture contained therein. Accordingly, the moisture measuring system includes the cylinder 31 for sample collection, the pipe through which the sample collected from the cylinder 31 is transferred to the sample loading device 40 , or the pipe 81 for discharging the sample of the sample discharging device 80 . It may further include one or more vibration generators (not shown) mounted on the . The vibration generator may be mounted on the corresponding pipe (or cylinder) to generate a vibration signal so that the coal dust 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 CPU (Central Processing Unit), DSP (Digital Signal Processing), ASIC (Application specific integrated circuit), PLC (Programmable Logic Controller), microprocessor, other chipsets, etc. It includes one or more processors to be used, and the 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 measuring method of FIG. 5 may be performed by the control system 90 of the moisture measuring system described above with reference to FIGS. 1 to 4B .

Referring to FIG. 5 , when the moisture measurement procedure is started, the control system 90 waits the sample container 51 at the sample loading position ( S10 ), and coal dusts from the inside of the duct 12 through the sample collection 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 It is possible to collect a powder sample by driving the inhaler 32 of the.

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

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

When the loading of the sample 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 transfer the powder 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 measuring device 70 acquires a moisture measured value from the corresponding sample, and transmits it to the control system 90 through wired/wireless communication. Accordingly, the control system 90 acquires a moisture measurement result for the sample through the moisture measurement device 70 in real time (S15).

On the other hand, when the moisture measurement 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 . make it (S16). In addition, the control system 90 controls the sample transfer device 50 to move the sample container 51 containing the returned sample toward the sample discharge device 80 ( S17 ). Thereafter, the control system 90 controls the sample transfer device 50 to discharge the sample contained in the sample container 51 to the sample discharge device 80 ( S18 ), and transfers the discharged sample container 51 to the loading position. Wait for the next sample loading by moving to .

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

The drawings and detailed description of the described invention referenced so far are merely exemplary of the present invention, which are only used for the purpose of explaining the present invention, and are used to limit the meaning or limit the scope of the present invention described in the claims. it is not Therefore, those of ordinary skill in the art can easily select from it and replace it. In addition, those skilled in the art may omit some of the components described herein without degrading 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 should be determined by the claims and their equivalents rather than the described embodiments.

12: duct
13: Hall
30: sample collection device
31: cylinder
32: inhaler
33: insertion control device
40: sample loading device
41: Hopper
42: cutting device
50: sample transfer device
51: sample vessel
52: conveyor belt
60: robot device
61: robot arm
70: moisture measuring device
80: sample ejection device
81: exhaust pipe
90: control system

Claims (15)

A system for measuring moisture in coal, comprising:
A sampling device for taking a sample from a duct that is a passageway through which the powder falls, and
and a moisture measuring device for measuring the amount of moisture in the sample collected by the sample collecting device,
The sample collection device,
A cylinder inserted into the coupling hole of the duct to take out the powdered coal to the sample, and
A moisture measuring system comprising a vacuum pump generating a suction force for taking out the sample from the inside of the cylinder According to claim 1,
a hopper for storing the sample sucked through the cylinder, and
The moisture measuring system further comprising a quantitative cutting device for constantly cutting the sample stored in the hopper and loading it into a sample container. 3. The method of claim 2,
The moisture measuring system further comprising a robot device for transferring the sample between the sample container and the plate (plate) of the moisture measuring device. 4. The method of claim 3,
Further comprising a conveyor belt for transporting the sample container,
The robot device, when the sample container is moved from a first position under the quantitative extraction device to a second position by the conveyor belt, transports the sample contained in the sample container onto the plate. 5. The method of claim 4,
When the moisture measurement of the sample is completed by the moisture measuring device, the robot device returns the sample to the sample container. 6. The method of claim 5,
When the sample container is moved to the third position by the conveyor belt, further comprising a sample discharge device for discharging the sample contained in the sample container to the duct,
The conveyor belt is configured to transfer the sample container from the second position to the third position when the sample for which moisture measurement has been completed is returned to the sample container by the robot device. According to claim 1,
The moisture measuring system includes a plurality of the moisture measuring devices,
A plurality of the moisture measuring device, respectively, the moisture measuring system for measuring the moisture content of the sample collected by the sample collecting device at different time points. 8. The method of claim 7,
The moisture measurement system further comprising a control system for receiving moisture content measured values from the plurality of moisture measuring devices, and obtaining an average value of the moisture content measured values as moisture data of the powdered coal. According to claim 1,
and the hole is opened only upon insertion of the cylinder. 10. The method of claim 9,
The cylinder is separated from the hole when sampling is completed, moisture measuring system. 10. The method of claim 9,
Further comprising a vibration generator coupled to the cylinder to generate vibration, moisture measurement system. According to claim 1,
The duct is
In the coal briquettes manufacturing facility, the powdered coal crushed by the crusher is dried by the dryer and then located in the path transported to the storage bin, the moisture measuring system. A method for measuring moisture in coal, the method comprising:
inserting a cylinder for sampling into a hole formed in a duct that is a passage through which the powdered coal falls;
The vacuum pump generates a suction force inside the cylinder to collect the powdered coal as a sample;
loading, by the quantitative extraction device, the sample collected by the cylinder into a sample container on standby at a first position;
transferring, by a conveyor belt, the sample container from a first position under the quantitative cutting device to a second position;
a robotic device gripping the sample from the sample container on the second position and transferring it to a moisture measurement device; and
The moisture measuring device, comprising the step of measuring the moisture content of the sample, moisture measuring method. 14. The method of claim 13,
When the measurement of the moisture content is completed by the moisture measuring device, returning, by the robot device, the sample on the moisture measuring device to the sample container, and
The method further comprising the step of transferring, by the conveyor belt, the sample container from the second position to a third position where the sample discharging device is located. 15. The method of claim 14,
When the sample container is transferred to the third position, the method further comprising the step of discharging the sample into the duct by the sample discharging device contained in the sample container.

Images