JP6065770B2 - Cover state determination device, cover state determination method, cover state determination system, and program - Google Patents

Description

  The present invention relates to a covering state determination device, a covering state determination method, a covering state determination system, and a program.

  The blast furnace is supplied with sintered ore made from iron ore raw material. In the process of manufacturing the sintered ore, the carbon material mixed with the iron ore raw material is burned. At this time, nitrogen oxides (NOx) are generated in the exhaust gas. This NOx is obtained by oxidizing nitrogen contained in the carbonaceous material, and it is known that the generation amount increases as the combustion temperature decreases. Therefore, in order to suppress the generation of NOx, it is required to burn the carbonaceous material at a high temperature as much as possible.

  Therefore, in Patent Document 1 described below, a technique for providing a coating layer that melts at a high temperature on the surface of the carbonaceous material particles in advance is proposed in order to increase the combustion temperature of the carbonaceous material. Patent Document 1 discloses a method in which water is added to a carbonaceous material and slaked lime powder for granulation, and a slaked lime coating having a predetermined thickness is attached to the surface of the carbonaceous material. Moreover, in the following patent document 2, the carbonaceous material modification processing equipment which coat | covers lime on the surface of a carbonaceous material is disclosed.

  These technologies are NOx reduction technologies unique to our company, and are expected to realize NOx reduction economically, and therefore have extremely high industrial value.

JP 2012-172206 A JP 2012-207256 A

  Here, when producing modified carbon materials such as those disclosed in Patent Document 1 and Patent Document 2, the carbon material and slaked lime are kneaded and granulated while adding an appropriate amount of water. Is required. However, even if the moisture is appropriate, a certain amount of kneading time is required to achieve a uniform slaked lime coating. This kneading time varies depending on the kneading conditions (kneading conditions) such as the structure of the kneader and the number of rolling.

  The technique disclosed in Patent Document 1 is based on the premise that a slaked lime coating having a uniform thickness is produced by sufficiently kneading. However, if the mixed brick is insufficient, the coating becomes uneven, and as a result, there is a concern that the effect of reducing NOx in the exhaust gas by increasing the ignition temperature of the carbonaceous fuel cannot be obtained. Therefore, when the surface-coated carbonaceous material is continuously produced using equipment as disclosed in Patent Document 2, it is desired to monitor the state of the surface-coated by some means.

  When determining the surface coating state of the surface layer coated carbon material, in general, the molded product manufactured in the production line is used as a sample, and the determination can be made by measuring the sample acquired from the production line offline. Many. However, in the method of sampling the manufactured molded product and performing the determination offline, there is a problem in that feedback to manufacturing control is delayed because analysis takes time.

  Thus, there has been a demand for a method that can determine the surface coating state of the surface-coated carbonaceous material in a shorter time.

  Then, this invention is made | formed in view of the said problem, The place made into the objective of this invention is the coating state determination apparatus which can determine the coating state of surface layer coating | coating carbon material in a shorter time, The object is to provide a covering state determination method, a covering state determination system, and a program.

  In order to solve the above problems, according to one aspect of the present invention, a surface layer in which the surface of the carbonaceous material is coated with the slaked lime, which is produced by kneading slaked lime containing a predetermined amount of water and the carbonaceous material. About the coated carbon material, based on the measurement data showing the measurement result of the absorbance of the surface layer coated carbon material by an infrared moisture meter using infrared light, a coating state determination unit for determining the coating state of the surface layer coated carbon material A covering state determination apparatus is provided.

  The covering state determination unit quantifies the covering state based on a difference between the absorbance obtained in advance and the absorbance in a state where the slaked lime and the carbonaceous material are completely kneaded and the absorbance in the measurement data. You may determine the coating | coated state of the said surface layer covering carbon material based on the obtained numerical value.

  The covering state determination unit acquires the absorbance in a state where the slaked lime and the carbonaceous material are completely separated and existed in advance, and the absorbance in the completely kneaded state and the completely separated exist. The covering state may be quantified in accordance with the position where the absorbance in the measurement data falls within the range of absorbance defined by

  The absorbance in the state of being completely separated may be obtained by measuring in advance a sample corresponding to the state.

  The absorbance in the state of being completely separated may be calculated based on a measurement result obtained by measuring each of the slaked lime and the carbonaceous material containing the predetermined amount of water.

  Moreover, in order to solve the said subject, according to another viewpoint of this invention, the said slaked lime coat | covers the surface of the said carbonaceous material manufactured by knead | mixing the slaked lime and carbonaceous material containing predetermined amount of water | moisture content. About the surface layer coated carbon material, the coating state for judging the coating state of the surface layer coated carbon material based on the measurement data showing the measurement result of the absorbance of the surface layer coated carbon material by the infrared moisture meter using infrared light A covering state determination method including a determination step is provided.

  Moreover, in order to solve the said subject, according to another viewpoint of this invention, the said slaked lime is manufactured on the surface of the said carbonaceous material manufactured by knead | mixing the slaked lime and carbonaceous material containing predetermined amount of water | moisture content. A system for determining a coating state of a coated surface layer carbonaceous material, wherein the surface layer coated carbon material is measured using infrared light in a predetermined wavelength band, and a measurement result of the absorbance of the surface layer coated carbon material is obtained. An infrared moisture meter that generates the indicated measurement data, and a coating state determination device that includes a coating state determination unit that determines a coating state of the surface layer coated carbonaceous material based on the measurement data generated by the infrared moisture meter; A covering state determination system is provided.

  In order to solve the above problems, according to still another aspect of the present invention, the surface of the carbonaceous material is manufactured by kneading a slaked lime containing a predetermined amount of water and the carbonaceous material in a computer. For the surface layer coated carbon material coated with the slaked lime, based on the measurement data showing the measurement result of the absorbance of the surface layer coated carbon material by an infrared moisture meter using infrared light, the covering state of the surface layer coated carbon material is A program for realizing a covering state determination function for determination is provided.

  As described above, according to the present invention, it is possible to determine the surface covering state of the surface-coated carbonaceous material in a shorter time by paying attention to the absorbance in the infrared band of the surface-coated carbonaceous material.

It is explanatory drawing which shows typically the whole structure of the covering state determination system which concerns on embodiment of this invention. It is a schematic diagram for demonstrating the principle of an infrared moisture meter. It is a schematic diagram for demonstrating the principle of an infrared moisture meter. It is explanatory drawing for demonstrating the covering state determination process which concerns on embodiment of this invention. It is explanatory drawing for demonstrating the covering state determination process which concerns on the same embodiment. It is explanatory drawing for demonstrating the covering state determination process which concerns on the same embodiment. It is explanatory drawing for demonstrating the covering state determination process which concerns on the same embodiment. It is explanatory drawing for demonstrating the covering state determination process which concerns on the same embodiment. It is the block diagram which showed an example of the structure of the covering state determination apparatus which concerns on the same embodiment. It is the flowchart shown about an example of the flow of the covering state determination method which concerns on the same embodiment. It is the block diagram which showed an example of the hardware constitutions of the covering state determination apparatus which concerns on embodiment of this invention.

  Exemplary embodiments of the present invention will be described below in detail with reference to the accompanying drawings. In addition, in this specification and drawing, about the component which has the substantially same function structure, duplication description is abbreviate | omitted by attaching | subjecting the same code | symbol.

(About the overall configuration of the covering state determination system)
First, an overall configuration of a covering state determination system according to an embodiment of the present invention will be briefly described with reference to FIGS.

  In the following, as an example of the surface-coated carbon material that is a molded product manufactured on the production line, powdered coke (hereinafter, also simply referred to as “powder coke”) and slaked lime are kneaded and the surface of the powdered coke. The modified coke produced by coating slaked lime with a modified coke will be described. However, the surface coating carbonaceous material that is the determination target in the coating state determination system according to the embodiment of the present invention is not limited to this modified coke.

  FIG. 1 is an explanatory diagram schematically showing a modified coke production line and an overall configuration of a coating state determination system according to an embodiment of the present invention provided in the production line. FIG. It is a schematic diagram for demonstrating the principle of a moisture meter.

  The modified coke to which attention is paid in the embodiment of the present invention is manufactured using, for example, powder coke having a particle size of about 1 to 2 mm and slaked lime having a particle size smaller than that of the powder coke (for example, about 70 μm or less). As shown in Fig. 2, a coating film made of slaked lime is formed on the surface of the powder coke particles.

Such modified coke is produced using slaked lime (Ca (OH) ₂ ) stored in the slaked lime tank 1 and powdered coke stored in the coke tank 2 as illustrated in FIG. .

  The powder coke stored in the coke tank 2 is transported to the kneading device 4 by the transport conveyor 3. During this transport, the water content of the powder coke is measured by the moisture meter 5 provided above the transport conveyor 3. Is measured in advance. Moreover, on this conveyance conveyor 3, the slaked lime cut out from the slaked lime tank 1 is laminated | stacked on a powder coke so that it may become a predetermined | prescribed mixture ratio (for example, about 12.8 mass% with respect to the whole mass). .

  In the kneading apparatus 4, water is supplied until the moisture value (for example, about 14%) that is an operational target for the powdered coke and slaked lime, and then the kneading process is performed. A molded product of modified coke coated with a coating is produced.

  The molded product of the modified coke is stored in the product tank 8 after the absorbance in a predetermined infrared wavelength band is measured by the infrared moisture meter 9 while being transported to the product tank 8 by the transport conveyor 7. . The infrared moisture meter 9 continuously measures, for example, the absorbance of the modified coke conveyed on the conveyor 7 at all times.

  Here, the amount of water supplied in the kneading apparatus 4, the measurement result of the moisture content of the powder coke by the moisture meter 5, and the measurement data of the absorbance by the infrared moisture meter 9 are, for example, one or a plurality of operation data holding servers 20. Are sequentially output and stored.

  The covering state determination apparatus 10 according to the embodiment of the present invention determines the surface covering state of the modified coke by using absorbance measurement data or the like held in the operation data holding server 20. The covering state determination device 10 will be described in detail later.

  In FIG. 1, the covering state determination apparatus 10 is illustrated to acquire various types of information from the operation data holding server 20, but the covering state determination apparatus 10 does not go through the operation data holding server 20. Various data may be obtained directly from various measuring instruments such as the infrared moisture meter 9.

  FIG. 2 schematically shows the configuration of a general infrared moisture meter used for measuring the moisture content of a measurement object. FIG. 3 is a diagram for explaining the principle of the infrared moisture meter. It is a schematic diagram.

  As shown schematically in FIG. 2, an infrared moisture meter for measuring the amount of moisture includes an infrared light source that emits light in the infrared band (infrared light), and infrared light emitted from the infrared light source. Mainly to an object to be measured, a wavelength selection filter, an optical system that guides the reflected infrared light to the detector, and a detector that detects the reflected infrared light.

  The infrared light emitted from the infrared light source is selected for the wavelength of the infrared light applied to the measurement object by the wavelength selection filter, and then the measurement area of the measurement object (for example, a size of about 50 mmφ). ). The reflected infrared light reflected from the measurement object is collected by the mirror and guided to the detector.

The infrared moisture meter, the intensity of the reflected infrared light in the wavelength of absorption by water (lambda _w) and (spectral reflection light intensity), located in the vicinity of the wavelength lambda _w, no water absorption wavelength (lambda _b1, The intensity of reflected infrared light (spectral reflected light intensity) at λ _b2 ) is measured. Such a wavelength can be appropriately determined based on the absorption wavelength of water. For example, 1780 nm, 1940 nm, and 2100 nm can be selected as the wavelengths λ _b1 , λ _w , and λ _b2 , respectively. is there. Thereafter, the infrared moisture meter calculates the absorbance of the measurement object based on these measurement results by the detector.

Here, since the absolute light quantity of the reflected light from the measurement object depends on the light source intensity, the blackness of the object surface, the scattering property, etc., in the infrared moisture meter, for example, as shown in FIG. Spectral reflected light intensity (R (λ _b1 ), R (λ _b2 )) of a reference wavelength (λ _b1 , λ _b2 ) that is not present is used as a reference. That is, in the infrared moisture meter, the base straight line is determined on the assumption that the spectral reflected light intensity R (λ _b1 ), R (λ _w ), R (λ _b2 ) is linear when the moisture is zero. Here, the spectral reflection intensity (calculated value) on the base straight line at the wavelength λ _w is R (λ _w0 ). The actually measured spectral reflection intensity R (λ _w ) decreases according to the amount of water. Here, R (λ _w ) varies exponentially with respect to the water content of interest based on Lambert-Beer's law. In such an infrared moisture meter, the absorbance is defined as the logarithm of the ratio between the spectral reflected light intensity R (λ _w0 ) and R (λ _w ), as shown below (Formula 1).

  In a general infrared moisture meter, the relationship (calibration curve) between moisture and absorbance that differs for each substance is obtained in advance, and the measurement is performed by referring to the calibration curve based on the absorbance of the measurement object calculated as described above. The moisture content of the object is specified and output as a moisture content measurement result. In the embodiment of the present invention, the surface covering state of the surface-covered carbonaceous material, which is the object to be measured, is determined using the above-described data relating to the absorbance calculated by the infrared moisture meter (hereinafter also simply referred to as measurement data). To do.

  In the embodiment of the present invention, the case where the measurement results of absorbance at three types of wavelengths preset by the infrared moisture meter as shown in FIGS. 2 and 3 are used is described. The three types of wavelengths of interest in the embodiment are not limited to the wavelengths set by commercially available infrared moisture meters.

  The covering state determination apparatus 10 according to the embodiment of the present invention described in detail below is transported on the production line by performing processing based on the measurement data of absorbance output from such an infrared moisture meter. The surface coating state of the modified coke can be measured online in a short time.

(Absorbance behavior in the infrared band of surface-coated carbonaceous materials)
Hereinafter, prior to describing the covering state determination process according to the embodiment of the present invention, the knowledge found by the present inventors and focused on in the covering state determination process according to the present embodiment will be described.

  First, in the laboratory, the inventors select the same sample conditions (conditions relating to the blending ratio of slaked lime and moisture content) as the operation using the actual machine, and manufacture the surface-coated carbon material while changing the kneading time. The difference in the surface coating state under the magnifier was observed. Here, the sample condition has an allowable range as described in Patent Document 1 above, and within the allowable range, the effect of coating with slaked lime can be obtained. As conditions, the mixture ratio of slaked lime was 12.8% by mass, and the water content was 14%.

  Here, in the kneading process in the laboratory, a small mixer was used as a kneading apparatus. The kneading time required to obtain a surface-coated carbon material having the same covering state as that of the surface-coated carbon material used in actual operation and having a good NOx reduction effect was 4 minutes.

  Therefore, the present inventors prepared three types: a sample kneaded for 4 minutes, a sample obtained by halving the kneading time to 2 minutes, and a sample obtained by reducing the kneading time to 1/10 to 0.4 minutes. Since it was difficult to discriminate the color of the carbonaceous material and slaked lime when the moisture was 14%, the sample was dried after kneading and observed with a magnifier.

  It is confirmed that a sample that is sufficiently kneaded to withstand use in actual operation (that is, a sample with a kneading time of 4 minutes) is almost entirely free of coating under a magnifying glass. It was done. On the other hand, the sample with a kneading time of 2 minutes had white spots with slaked lime in various places in the field of view. In addition, in the sample with a kneading time of 0.4 minutes, a white portion where only slaked lime was granulated and a black region where charcoal material was exposed because there was no slaked lime coating existed in the visual field. Thus, it was confirmed that uniform coating cannot be realized if kneading is insufficient.

  Next, the present inventors considered that the water retention state of the surface layer would change if the coating state was different, and that the change would appear in the output of the infrared moisture meter. The results were observed with an infrared moisture meter as shown in FIG. At this time, in addition to the above three types of samples, a sample kneaded for 6 minutes was added, and a total of four types of samples were measured. The measured values of the three-wavelength spectral reflected light intensity of the infrared moisture meter were as shown in FIG.

FIG. 4 shows the relative value of the spectral reflected light intensity based on the spectral reflected light intensity of the reference wavelength on the short wavelength side. That is, based on the spectral reflected light intensity at the short wavelength side (wavelength λ _b1 ) without absorption by water, the spectral reflected light intensity (wavelength λ _b2 ) at the other wavelength without absorption by water, Infrared reflection intensity at a wavelength (wavelength λ _w ) at which absorption is caused by. The vertical axis in FIG. 4 is the relative spectral reflected light intensity (hereinafter also referred to as relative spectral reflected light intensity), and the horizontal axis is the wavelength.

  In the graph shown in FIG. 4, paying attention to the intensity of relative spectral reflection light having a wavelength of 1940 nm in the water absorption band, there was almost no difference between the kneading treatment for 6 minutes and 4 minutes. On the other hand, in the case of kneading for 2 minutes and the case of kneading for 0.4 minutes, the drop of the reference wavelength with respect to the spectral reflected light intensity increased in order. The absorbance calculated from the above (Formula 1) was about 0.042 and 0.071, respectively, at a kneading time of 6 minutes and a kneading time of 0.4 minutes.

  As can be seen from FIG. 4, when the kneading time is shortened, the intensity of spectral reflected light having a wavelength of 1940 nm corresponding to the moisture absorption band is decreased, and a measurement value as if moisture has increased can be obtained. Such a phenomenon is a finding that has been clarified for the first time by study by the present inventors.

Although the cause of the phenomenon is not clear, the present inventors have considered the following hypothesis that can explain the phenomenon.
That is, it is considered that there exist pseudo particles that differ in the manner of attachment of slaked lime particles, as schematically shown in FIG. 5, depending on whether or not the coating is uniform. Carbonaceous materials such as coke have good water absorption, and water added during kneading easily penetrates into the carbonaceous material. On the other hand, slaked lime has poor water absorption, and water added to the surface layer remains. Here, since the carbonaceous material and slaked lime are opaque to infrared light, the infrared ray having a wavelength that receives water absorption increases as the surface layer has more moisture, and the reflected light intensity decreases. To go. In the state shown in the lower part of FIG. 5 (fully kneaded state), since most of the slaked lime powder is in uniform contact with the carbonaceous material, water is absorbed by the carbonaceous material having high absorbency, and infrared rays are absorbed. It is considered that the amount of water on the surface of the projected pseudo particle is reduced. On the contrary, in the state shown in the middle part of FIG. 5, there are many places where slaked lime particles having poor water absorption are aggregated, and the moisture content of the surface layer becomes high when viewed as a whole pseudo particles. As a result, the phenomenon shown in FIG. 4 is considered to occur.

(Relation between absorbance behavior and surface coating state of surface coating carbonaceous material)
Next, the relationship between the absorbance behavior of the surface layer-covered carbonaceous material and the surface coating state will be described with reference to FIGS.
In order to verify the above-mentioned temporary setting, the present inventors used a sample having the same sample conditions (mixed slaked lime: 12.8% by mass, moisture content 14%) and used a plurality of samples with different kneading times. Absorbance was measured using an infrared moisture meter as shown in FIG. The obtained results are shown in FIG. In FIG. 6, the vertical axis represents the absorbance calculated by (Equation 1), and the horizontal axis represents the kneading time.

  As is clear from FIG. 6, the shorter the kneading time, the larger the measured absorbance value, and the longer the kneading time, the more stable the change in absorbance, and the absorbance was about 0.04. You can see that it is asymptotic. In addition, as is clear from observation of the surface layer coated carbon material under the magnifying glass and FIG. 5, the longer the kneading time is, the better the coated state with slaked lime is realized. Therefore, the asymptotic value of absorbance can be considered as the absorbance when slaked lime and carbonaceous materials are completely kneaded to achieve a uniform and good covering state.

  Here, FIG. 6 shows how the absorbance changes under the kneading conditions (slaked lime mixing ratio 12.8% by mass, moisture content 14%), but when the mixing ratio and moisture content of slaked lime are changed. Even so, although the asymptotic absorbance value is different, the measured change in the absorbance of the surface-coated carbon material showed the same behavior as in FIG.

  Based on such knowledge, the inventors measured the absorbance of the surface-coated carbonaceous material and determined whether or not the absorbance became a predetermined threshold value or less (in other words, as shown in FIG. The inventors have come up with the idea that the surface covering state of the surface-covered carbonaceous material can be determined according to a certain absorbance (for example, whether or not it can be regarded as asymptotic to the absorbance 0.04 in FIG. 6).

  That is, paying attention to the absorbance of the surface-coated carbonaceous material measured at a certain time, depending on whether the measured absorbance is below a predetermined threshold determined according to the slaked lime mixing ratio and moisture content, It becomes possible to determine the surface covering state of the material. In the example shown in FIG. 6, the determination threshold value of the absorbance in (slaked lime mixing ratio 12.8 mass%, moisture content 14%) is set to 0.043, for example, and the measured absorbance of the surface-coated carbonaceous material is 0.043. Whether or not a favorable surface covering state is realized can be determined depending on whether or not the following is true. Moreover, in this determination method, it can be said that the surface coating state of the surface-coated carbon material is quantified by the absorbance of the surface-coated carbon material.

  Note that the threshold value used for the determination may be an asymptotic value of absorbance at the kneading time at infinity, for example, as shown in FIG. 6, or by adding knowledge obtained from past operation data to the asymptotic value at infinity. An absorbance having a value larger than an asymptotic value corresponding to a surface coating state having no problem (that is, a state in which a desired increase in the combustion temperature of the carbonaceous material can be obtained) may be used as a threshold value for determination.

  Based on the above knowledge, the present inventors can objectively determine the surface covering state of the surface-coated carbonaceous material, and the covering state determining apparatus and covering according to the embodiment of the present invention described below I came up with a method for judging the state.

  When manufacturing the surface-coated carbonaceous material in actual operation, it is considered that the kneading time for stably producing a preferable surface coating state is set to the kneading time for operation. Here, by using the covering state determination method according to the embodiment of the present invention based on the above knowledge, for example, the following verification can be realized. In other words, the surface layer discharged from the kneading device when it is necessary to determine the limit conditions that allow good coating to increase productivity, or when the occurrence of an insufficient kneading state due to an abnormality in the kneading device is detected quickly. By continuously monitoring the molded product of the coated carbon material with an infrared moisture meter and paying attention to the output absorbance, it is possible to easily and objectively determine whether or not there is a kneading failure.

  Further, as a result of further examination of the above knowledge, the present inventors have come up with a coating index P that standardizes the change in absorbance and expresses the surface coating state of the surface coating carbonaceous material with a value between 0 and 1. did. More specifically, the covering index P is a value represented by the following (Formula 2).

Here, in the above (Formula 2),
k: Measured value of absorbance of surface-coated carbon material k _i : Absorbance in a state where slaked lime and carbon material are completely kneaded k ₀ : Absorbance in a state where slaked lime and carbon material are completely separated and k _i Corresponds to the absorbance in the complete surface coating state, for example asymptotic values in FIG. 6, and k ₀ corresponds to the absorbance in the absence of any slaked lime coating.

For example, in FIG. 6, the absorbance value at a kneading time of 6 minutes is set to “coating index P = 1” corresponding to a fully coated state. The absorbance k _i in this case was calculated as an average value of a plurality of absorbance measurement values, which was 0.041.

On the other hand, “covering index P = 0” corresponding to a state where the coating is not performed at all is a state where the carbonaceous material and the slaked lime are separated from each other. Such an absorbance k ₀ corresponding to the coating index P = 0 can be specified by one of the following two methods, for example.

The first method of specifying the absorbance k ₀ corresponding to the covering index P = 0 is that each of the carbonaceous material and the slaked lime that has the water content of interest (for example, the water content set in actual operation). The average value weighted by the mixing ratio of interest (for example, the mixing ratio set in actual operation) and the reflectance specific to the material for the two types of absorbance obtained in advance. Is an absorbance k ₀ corresponding to the coating index P = 0. When the absorbance k ₀ in this case is formulated, the following (Equation 3) is obtained.

Here, in the above (Formula 3),
k _C: the focused absorbance k of carbonaceous material alone in water content are _L: Focusing to have absorbance of slaked lime alone in water content S _C: mixing volume ratio of carbonaceous material S _L: mixing volume of slaked lime ratio R _C: Charcoal Material reflectivity _RL : The reflectivity of slaked lime.

When the absorbance k _C and k _L were measured, k _C = 0.021 and k _L = 0.352. The mixing volume ratio _{S C} and _{S L} may be determined from the mass ratio and the specific gravity of the carbonaceous material and slaked _lime, S C = _0.9, a S L = 0.1. Moreover, when the samples of carbonaceous materials and slaked lime in a dry state (state not affected by absorption by water) were prepared in the wavelength band used by the infrared moisture meter, and the reflectances R _C and _RL were measured, R _C = 0.1 and R _L = 0.8. By substituting these numerical values into the above (Equation 3), the absorbance k ₀ corresponding to the covering index P = 0 can be obtained as 0.173.

The second method for specifying the absorbance k ₀ corresponding to the covering index P = 0 is, for example, as shown schematically in FIG. This is a method in which a standard sample with separated water is prepared and the absorbance of the standard sample is measured. For example, under the sample conditions shown in FIG. 6, the carbon material having a moisture content of 14% is 87.2% by mass and the slaked lime having a moisture content of 14% is measured by 12.8% by the infrared moisture meter. Prepare a standard sample placed separately in the field of view. In addition, the absorbance obtained by measuring the standard sample can be used as the absorbance k ₀ corresponding to the coating index P = 0.

  When the absorbance measurement data shown in FIG. 6 is converted into the covering index P based on the above (Equation 2), it is as shown in FIG. In FIG. 8, the vertical axis represents the coating index P, and the horizontal axis represents the kneading time.

When determining the surface covering state of the surface layer coated carbon material using the covering index P as shown in FIG. 8, the absorbance k ₀ and the absorbance k ₁ are specified based on the past operation data and the like. A threshold value corresponding to an uncovered surface covering state is specified in advance, and the surface covering state may be determined according to whether or not the covering index P calculated from the measured absorbance is equal to or greater than the threshold value. In this case, when the measured absorbance is equal to or greater than the threshold value, it can be determined that the surface-coated carbonaceous material is in a good surface coating state.

  As described above, the absorbance in a completely covered state is considered to vary by changing the amount of water and the mixing ratio of slaked lime. Therefore, as shown in FIG. 6, in the case of determining the surface coating state by directly using the measured absorbance, it may be difficult to determine the degree of kneading failure. On the other hand, the covering index P shown in the above (Equation 2) represents a good degree of the surface covering state by using a numerical value scaled between 0 and 1, and therefore paying attention to the covering index P, It becomes possible to grasp the surface covering state of the surface layer coated carbon material more easily.

  Based on the technical idea as described above, the present inventors have conceived a covering state determination apparatus and a covering state determination method described below. Hereinafter, the covering state determination device and the covering state determination method according to the present embodiment will be described in detail with reference to FIGS. 9 and 10.

(About the configuration of the covering state determination device)
First, the configuration of the covering state determination apparatus 10 according to the present embodiment will be described in detail with reference to FIG. FIG. 9 is a block diagram illustrating an example of the configuration of the covering state determination apparatus 10 according to the present embodiment.

  The covering state determination apparatus 10 according to the present embodiment determines the covering state of the surface-coated carbonaceous material based on the absorbance measurement data of the surface-coated carbonaceous material generated by an infrared moisture meter such as an infrared moisture meter. As shown in FIG. 9, the covering state determination apparatus 10 mainly includes a data acquisition unit 101, a covering state determination unit 103, a result output unit 105, a display control unit 107, and a storage unit 109. .

  The data acquisition unit 101 is realized by, for example, a CPU (Central Processing Unit), a ROM (Read Only Memory), a RAM (Random Access Memory), a communication device, and the like. The data acquisition unit 101 obtains measurement results from a server or database that stores measurement data of absorbance in the infrared band of a determination target (for example, surface-coated carbon material such as modified coke) such as an operation data holding server. The data (measurement data) indicating is obtained. The data acquisition unit 101 can also directly acquire data indicating the measurement results from the infrared moisture meter 9. When the data acquisition unit 101 acquires the measurement data used for the surface covering state determination process, the data acquisition unit 101 outputs the acquired measurement data to the covering state determination unit 103 described later.

  In addition, the data acquisition unit 101 performs various operations such as the moisture content of slaked lime supplied to the kneading device 4 and the amount of water added by the kneading device 4 when producing modified coke, for example. It is also possible to acquire data and output it to the covering state determination unit 103.

  The covering state determination unit 103 is realized by, for example, a CPU, a ROM, a RAM, and the like. The covering state determination unit 103 determines the covering state of the surface-coated carbonaceous material (for example, modified coke) that is the determination target based on the absorbance measurement data acquired by the data acquisition unit 101.

  More specifically, the covering state determination unit 103 uses the absorbance measurement data output from the data acquisition unit 101 as a determination target based on a determination threshold stored in the storage unit 109 and the like described later. The surface covering state of a certain surface layer covering carbon material is determined.

  The determination processing of the surface covering state of the surface layer coated carbon material performed by the covering state determination unit 103 is determination processing using the absorbance k or the covering index P calculated based on the absorbance k as described above.

When the determination process using the absorbance k is performed, as previously described with reference to FIG. 6, the covering state determination unit 103 is configured so that slaked lime and charcoal containing a predetermined amount of moisture are completely obtained. The covering state is digitized based on the difference between the absorbance (k _i ) in the kneaded state and the absorbance k in the measurement data, and the covering state of the surface-coated carbonaceous material is determined based on the obtained numerical value.

  Moreover, when performing the determination process using the covering index P, as described previously with reference to FIG. 8, the covering state determining unit 103 has the absorbance in a state where the slaked lime and the carbonaceous material are completely separated and present. Is obtained in advance, and the absorbance in the measurement data within the absorbance range defined by the absorbance in a completely kneaded state and the absorbance in a completely separated state exists. Accordingly, the covering index P is calculated, and the covering state of the surface covering carbonaceous material is determined based on the covering index P.

  In addition, the determination threshold value used for said determination process is not limited to the value shown in FIG.6 and FIG.8, The surface layer coating | coating material manufactured according to the actual operation conditions is utilized for operation. Using the measurement data obtained by measuring with the infrared moisture meter 9, it may be specified in advance according to the operating conditions by the method described above.

  The covering state determination unit 103 outputs data corresponding to the determination result thus obtained to the result output unit 105 described later.

  The result output unit 105 is realized by, for example, a CPU, a ROM, a RAM, an output device, a communication device, and the like. The result output unit 105 outputs data corresponding to the determination result output from the covering state determination unit 103 to the user of the covering state determination device 10. Specifically, the result output unit 105 associates data corresponding to the determination result with time data related to the date and time when the data is generated, and outputs the data to various servers and control devices, or an output device such as a printer. Use it to output as a paper medium. The result output unit 105 may output data corresponding to the determination result to various information processing apparatuses such as a computer provided outside or to various recording media.

  In addition, when the result output unit 105 outputs data corresponding to the determination result to an output device such as a display provided in the covering state determination device 10 or a display of various devices provided outside, The determination result is output in cooperation with a display control unit 107 described later.

  The display control unit 107 is realized by, for example, a CPU, ROM, RAM, output device, communication device, and the like. The display control unit 107 performs display control when displaying data corresponding to the determination result on various display devices such as a display. Thereby, the user of the covering state determination apparatus 10 can grasp the determination result regarding the surface covering state of the determination target object on the spot.

  Further, the display control unit 107 can perform display control such as quickly displaying the determination result of the determination object output from the result output unit 105. Thereby, the determination result of the surface covering state of the determination target object to be manufactured (for example, surface coating carbon material such as modified coke) is quickly displayed on the display screen, and the user of the covering state determination device 10 It becomes possible to quickly recognize whether or not a molded product having an unfavorable state has occurred, and determine whether or not to handle the abnormality that has occurred. Further, the display control unit 107 may display an alarm for notifying that the surface covering state has deteriorated or information necessary for the treatment on the display screen, or may generate an audio signal or the like as an alarm.

  By outputting the determination result to the user in this way, when the deterioration of the surface coating state occurs, the user can add the amount of added water during the inspection operation or kneading of the equipment such as the kneading apparatus. Coping operations such as increasing the kneading time and the like can be performed quickly, and the yield of products can be improved.

  The storage unit 109 is realized by, for example, a RAM, a storage device, or the like. In the storage unit 109, the covering state determination apparatus 10 according to the present embodiment stores various parameters, the progress of processing, or various databases and programs that need to be saved when performing some processing. Recorded as appropriate. One or more of these parameters, databases, etc. may be stored depending on the operating conditions of the molded product. The storage unit 109 may also record various objects such as icons used when the display control unit 107 configures a display screen for displaying the analysis result. In this storage unit 109, the data acquisition unit 101, the arithmetic processing unit 103, the result output unit 105, the display control unit 107, and the like included in the covering state determination apparatus 10 can freely perform data read / write processing. .

  Heretofore, an example of the function of the covering state determination apparatus 10 according to the present embodiment has been shown. Each component described above may be configured using a general-purpose member or circuit, or may be configured by hardware specialized for the function of each component. In addition, the CPU or the like may perform all functions of each component. Therefore, it is possible to appropriately change the configuration to be used according to the technical level at the time of carrying out the present embodiment.

  A computer program for realizing each function of the covering state determination apparatus according to the present embodiment as described above can be produced and installed in a personal computer or the like. In addition, a computer-readable recording medium storing such a computer program can be provided. The recording medium is, for example, a magnetic disk, an optical disk, a magneto-optical disk, a flash memory, or the like. Further, the above computer program may be distributed via a network, for example, without using a recording medium.

(About the flow of the covering state judgment method)
Next, an example of the flow of the covering state determination method performed by the covering state determination system according to the present embodiment will be briefly described with reference to FIG. FIG. 10 is a flowchart illustrating an example of the flow of the covering state determination method according to the present embodiment.

  Hereinafter, the flow of the covering state determination method using the determination process based on the absorbance k or the covering index P will be briefly described with reference to FIG.

  In the coating state determination method using the determination process based on the absorbance k or the coating index P, first, the infrared moisture meter 9 measures the absorbance of modified coke, which is an example of a surface-coated carbon material that is a determination target ( Step S101). As a result, measurement data indicating the measurement result of the absorbance of the modified coke is generated.

  The data acquisition unit 101 of the coating state determination apparatus 10 acquires measurement data indicating the measurement result of the absorbance of the modified coke generated by the infrared moisture meter 9 and outputs the measurement data to the coating state determination unit 103. The covering state determination unit 103 digitizes the covering state based on the absorbance measurement data output from the data acquisition unit 101 (step S103). That is, the coating state determination unit 103 quantifies the surface coating state of the modified coke using the absorbance k itself described in the acquired measurement data or the coating index P calculated using the absorbance k. To do.

  Thereafter, the covering state determination unit 103 uses the determination threshold value stored in advance in the storage unit 109 and the like, and the value obtained by quantifying the surface covering state such as the absorbance k or the covering index P, to cover the modified coke. The state is determined (step S105). Thereafter, the covering state determination unit 103 outputs data indicating the obtained determination result to the result output unit 105.

  When the result output unit 105 acquires information indicating the determination result, the result output unit 105 outputs the acquired information to the display control unit 107 and the storage unit 109. The display control unit 107 displays information indicating these determination results on the display screen (step S107). Thereby, the user can grasp | ascertain the surface coating state of surface layer covering carbon materials, such as the modified coke currently manufactured, in a short time.

  The flow of the covering state determination method according to the present embodiment has been briefly described above with reference to FIG.

(About hardware configuration)
Next, the hardware configuration of the covering state determination apparatus 10 according to the embodiment of the present invention will be described in detail with reference to FIG. FIG. 11 is a block diagram for explaining a hardware configuration of the covering state determination apparatus 10 according to the embodiment of the present invention.

  The covering state determination apparatus 10 mainly includes a CPU 901, a ROM 903, and a RAM 905. The covering state determination device 10 further includes a bus 907, an input device 909, an output device 911, a storage device 913, a drive 915, a connection port 917, and a communication device 919.

  The CPU 901 functions as an arithmetic processing unit and a control unit, and controls all or a part of the operation in the covering state determination apparatus 10 according to various programs recorded in the ROM 903, the RAM 905, the storage device 913, or the removable recording medium 921. . The ROM 903 stores programs used by the CPU 901, calculation parameters, and the like. The RAM 905 primarily stores programs used by the CPU 901, parameters that change as appropriate during execution of the programs, and the like. These are connected to each other by a bus 907 constituted by an internal bus such as a CPU bus.

  The bus 907 is connected to an external bus such as a PCI (Peripheral Component Interconnect / Interface) bus via a bridge.

  The input device 909 is an operation unit operated by the user, such as a mouse, a keyboard, a touch panel, a button, a switch, and a lever. Further, the input device 909 may be, for example, remote control means (so-called remote control) using infrared rays or other radio waves, or may be an external connection device 923 such as a PDA corresponding to the operation of the covering state determination device 10. There may be. Furthermore, the input device 909 includes, for example, an input control circuit that generates an input signal based on information input by a user using the operation unit and outputs the input signal to the CPU 901. The user of the covering state determination apparatus 10 can input various data and instruct processing operations to the covering state determination apparatus 10 by operating the input device 909.

  The output device 911 is configured by a device that can notify the user of the acquired information visually or audibly. Examples of such devices include CRT display devices, liquid crystal display devices, plasma display devices, EL display devices and display devices such as lamps, audio output devices such as speakers and headphones, printer devices, mobile phones, and facsimiles. The output device 911 outputs, for example, results obtained by various processes performed by the covering state determination device 10. Specifically, the display device displays results obtained by various processes performed by the covering state determination device 10 as text or images. On the other hand, the audio output device converts an audio signal composed of reproduced audio data, acoustic data, and the like into an analog signal and outputs the analog signal.

  The storage device 913 is a data storage device configured as an example of a storage unit of the covering state determination device 10. The storage device 913 includes, for example, a magnetic storage device such as an HDD (Hard Disk Drive), a semiconductor storage device, an optical storage device, or a magneto-optical storage device. The storage device 913 stores programs executed by the CPU 901, various data, various data acquired from the outside, and the like.

  The drive 915 is a reader / writer for a recording medium and is built in or externally attached to the covering state determination device 10. The drive 915 reads information recorded on a removable recording medium 921 such as a mounted magnetic disk, optical disk, magneto-optical disk, or semiconductor memory, and outputs the information to the RAM 905. The drive 915 can also write a record on a removable recording medium 921 such as a magnetic disk, an optical disk, a magneto-optical disk, or a semiconductor memory. The removable recording medium 921 is, for example, a CD medium, a DVD medium, a Blu-ray (registered trademark) medium, or the like. The removable recording medium 921 may be a CompactFlash (registered trademark) (CompactFlash: CF), a flash memory, an SD memory card (Secure Digital memory card), or the like. Further, the removable recording medium 921 may be, for example, an IC card (Integrated Circuit card) on which a non-contact IC chip is mounted, an electronic device, or the like.

  The connection port 917 is a port for directly connecting a device to the covering state determination apparatus 10. Examples of the connection port 917 include a USB (Universal Serial Bus) port, an IEEE 1394 port, a SCSI (Small Computer System Interface) port, and an RS-232C port. By connecting the external connection device 923 to the connection port 917, the covering state determination apparatus 10 acquires various data directly from the external connection device 923 or provides various data to the external connection device 923.

  The communication device 919 is a communication interface configured with, for example, a communication device for connecting to the communication network 925. The communication device 919 is, for example, a communication card for wired or wireless LAN (Local Area Network), Bluetooth (registered trademark), or WUSB (Wireless USB). The communication device 919 may be a router for optical communication, a router for ADSL (Asymmetric Digital Subscriber Line), or a modem for various communication. The communication device 919 can transmit and receive signals and the like according to a predetermined protocol such as TCP / IP, for example, with the Internet and other communication devices. The communication network 925 connected to the communication device 919 is configured by a wired or wireless network, and may be, for example, the Internet, a home LAN, infrared communication, radio wave communication, satellite communication, or the like. .

  Heretofore, an example of the hardware configuration capable of realizing the function of the covering state determination device 10 according to the embodiment of the present invention has been shown. Each component described above may be configured using a general-purpose member, or may be configured by hardware specialized for the function of each component. Therefore, it is possible to change the hardware configuration to be used as appropriate according to the technical level at the time of carrying out this embodiment.

(Summary)
As described above, according to the covering state determination device and the covering state determination method according to the embodiment of the present invention, it is possible to continuously determine whether the surface coating carbonaceous material immediately after manufacture is good or bad in the non-contact manner. Can do. By producing the surface layer coated carbon material while monitoring the coating state using this method, the productivity of the surface layer coated carbon material can be maximized without kneading over a redundant time. For example, by using this method, the kneading index that can ensure the NOx reduction effect is grasped in advance, and the operating conditions of the kneading apparatus can be controlled so as not to fall below this kneading index. In addition, according to the present method, when a mechanical abnormality occurs in a kneading apparatus such as a mixer or a pan pelletizer, and a surface-coated carbon material that is not sufficiently kneaded is produced, such a situation can be detected quickly.

  The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings, but the present invention is not limited to such examples. It is obvious that a person having ordinary knowledge in the technical field to which the present invention pertains can come up with various changes or modifications within the scope of the technical idea described in the claims. Of course, it is understood that these also belong to the technical scope of the present invention.

DESCRIPTION OF SYMBOLS 10 Cover state determination apparatus 101 Data acquisition part 103 Cover state determination part 105 Result output part 107 Display control part 109 Storage part

Claims (8)

The surface layer of the surface layer coated carbonaceous material produced by kneading slaked lime and carbonaceous material containing a predetermined amount of water and coated with the slaked lime on the surface of the carbonaceous material, using an infrared moisture meter using infrared light. A covering state determination device comprising: a covering state determination unit that determines a covering state of the surface layer covering carbon material based on measurement data indicating a measurement result of absorbance of the covering carbon material. The covering state determination unit quantifies the covering state based on a difference between the absorbance obtained in advance and the absorbance in a state where the slaked lime and the carbonaceous material are completely kneaded and the absorbance in the measurement data. The covering state determining apparatus according to claim 1, wherein the covering state of the surface layer covering carbonaceous material is determined based on the obtained numerical value. The covering state determination unit
The absorbance in a state where the slaked lime and the carbonaceous material are completely separated and present in advance,
Depending on the position where the absorbance in the measurement data falls within the absorbance range defined by the absorbance in the completely kneaded state and the absorbance in the completely separated state, the coated state The covering state determination device according to claim 2, wherein 4. The covering state determination apparatus according to claim 3, wherein the absorbance in the state of being completely separated is obtained by measuring in advance a sample corresponding to the state. The absorbance in the state of being completely separated is calculated based on a measurement result obtained by measuring each of the slaked lime and the carbonaceous material containing the predetermined amount of water, respectively. 3. The covering state determination apparatus according to 3. The surface layer of the surface layer coated carbonaceous material produced by kneading slaked lime and carbonaceous material containing a predetermined amount of water and coated with the slaked lime on the surface of the carbonaceous material, using an infrared moisture meter using infrared light. A covering state determining method comprising a covering state determining step for determining a covering state of the surface layer covering carbonaceous material based on measurement data indicating a measurement result of absorbance of the covering carbonaceous material. A system for judging a covering state of a surface layer-covered carbonaceous material produced by kneading slaked lime and a carbonaceous material containing a predetermined amount of water, wherein the surface of the carbonaceous material is coated with the slaked lime,
An infrared moisture meter that measures the surface-coated carbonaceous material using infrared light in a predetermined wavelength band, and generates measurement data indicating the measurement result of the absorbance of the surface-coated carbonaceous material,
Based on the measurement data generated by the infrared moisture meter, a covering state determination device having a covering state determination unit that determines the covering state of the surface layer coated carbonaceous material,
A covering state determination system comprising: On the computer,
The surface layer of the surface layer coated carbonaceous material produced by kneading slaked lime and carbonaceous material containing a predetermined amount of water and coated with the slaked lime on the surface of the carbonaceous material, using an infrared moisture meter using infrared light. The program for implement | achieving the covering state determination function which determines the covering state of the said surface layer covering carbon material based on the measurement data which showed the measurement result of the light absorbency of a covering carbon material.

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