Method and equipment for manufacturing cement clinker

Abstract

To provide an apparatus for sorting a fuel for producing a cement clinker, capable of continuously and stably producing the cement clinker even when a waste containing various components is used as a fuel.SOLUTION: An apparatus 100 for sorting a fuel for producing a cement clinker is provided, the apparatus 100 including: a prediction device 20 that irradiates a fuel containing a waste with electromagnetic waves to obtain information on at least one selected from the group consisting of absorption, scattering, and transmission of electromagnetic waves, and then predicts a calorific value using the information; and a sorting part 40 for conducting sorting into a plurality of sorted fuels, including at least a first sorted fuel and a second sorted fuel with a lower calorific value than the first sorted fuel, based on the predicted results of the calorific value.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a fuel sorting method and a sorting apparatus, as well as a method and an apparatus for manufacturing cement clinker. [Background Art]

[0002] In a cement clinker manufacturing facility, waste including waste plastic is used as fuel. Waste including waste plastic contains various components such as plastics, paper, and wood chips. There are also various types of plastics. In the current situation, the proportions of these components vary greatly depending on the waste received at the raw material receiving facility. For example, some wastes contain a large amount of plastics with high calorific value, while other wastes contain a large amount of paper and wood chips with low calorific value.

[0003] As a method of using such waste containing waste plastic as fuel in a cement clinker manufacturing facility, Patent Document 1 proposes a technique that adjusts the usage amounts of wastes with different calorific values each time so as to satisfy a specific relational expression, thereby suppressing fluctuations in the firing temperature of cement clinker.

[0004] On the other hand, Non-Patent Document 1 describes various sensor sorting techniques to improve the sorting accuracy of waste products with complex compositions such as waste home appliances and automobiles. For detecting object information, a method is mentioned that uses electromagnetic waves from γ-rays to microwaves to acquire various detection information such as infrared absorption spectra, X-ray transmittance, and Raman spectra, and identifies objects based on these detection information. It is also proposed that such object identification be performed by setting a threshold based on a peak height, area value or the like, or based on similarity across the entire data such as multivariate analysis or a neural network. [Prior Art Documents] [Patent Documents]

[0005] [Patent Document 1] Japanese Patent Publication No. 2004-292200 [Non-patent literature]

[0006] [Non-Patent Document 1] Nakashige Furuya, "Recent Trends in Sensor Sorting Technology in Resource Recycling," Journal of MMIJ, Vol. 129, 2013, No. 10, 11, pp. 615-624. [Overview of the Initiative] [Problems that the invention aims to solve]

[0007] Cement clinker manufacturing facilities will continue to be required to process large amounts of waste. However, with current processing methods, fluctuations in the heat output of the waste used can cause temperature fluctuations within the cement clinker manufacturing equipment, raising concerns that the frequency of operational adjustments will increase.

[0008] Therefore, the present invention provides a method for manufacturing cement clinker and a cement clinker manufacturing apparatus that enable the stable and continuous production of cement clinker even when using waste containing various components as fuel. Furthermore, the present invention provides a method for separating fuel for cement clinker production and a fuel separation apparatus for cement clinker production that enable the stable and continuous production of cement clinker even when using waste containing various components as fuel. [Means for solving the problem]

[0009] In one aspect, the present invention provides a method for separating fuel for cement clinker production, comprising: a prediction step of irradiating fuel containing waste with electromagnetic waves to obtain information on at least one selected from the group consisting of absorption, scattering, and transmission of electromagnetic waves, and using said information to predict the calorific value; and a separation step of separating the fuel into a plurality of separated fuels, including a first separated fuel and a second separated fuel having a lower calorific value than the first separated fuel, based on the calorific value prediction result.

[0010] In the above sorting method, information is obtained by irradiating the fuel with electromagnetic waves to predict the calorific value, and based on the prediction result, the fuel is sorted into multiple fuels, including first-fractionated fuel and second-fractionated fuel. Therefore, fuel containing waste with various components used in the manufacture of cement clinker can be smoothly sorted into multiple fuels. Furthermore, when manufacturing cement clinker, the introduction positions of the multiple fractionated fuels sorted based on the calorific value prediction result can be set separately, or the introduction amount can be adjusted individually. As a result, even when waste is used as fuel, operational fluctuations during cement clinker manufacture are suppressed, and cement clinker manufacture can be continued stably.

[0011] In the prediction step described above, it is preferable to use the above information to predict the fuel's constituent components or component content, and in the separation step described above, to separate the fuel based on the prediction results. This makes it possible to select the supply destination for each of the multiple separated fuels or adjust the individual introduction amounts in the cement clinker production process according to the predicted constituent components or component content. Therefore, even when waste is used as fuel, operational fluctuations during cement clinker production are further suppressed, and cement clinker production can be continued more stably.

[0012] The first fractionated fuel preferably has a calorific value of 5000 kcal / kg or more. Because such a first fractionated fuel has a sufficiently high calorific value, it can suppress the temperature drop of the cement kiln even when introduced into the cement kiln. Therefore, it can be suitably used as a substitute for fossil fuels such as pulverized coal.

[0013] In the above separation method, it is preferable to predict the chlorine content of at least one of the separated fuels based on the above information. Since the first separated fuel has a higher calorific value than the second separated fuel, it can be suitably used as fuel for the cement kiln. However, an increase in the amount of chlorine introduced into the cement kiln can cause coating within the kiln. Therefore, by predicting the chlorine content, it is possible to limit the amount of the first separated fuel introduced into the cement kiln or stop its introduction to the cement kiln depending on the chlorine content. Furthermore, by predicting the chlorine content of the separated fuels other than the first separated fuel, it is possible to predict the total amount of chlorine introduced into the cement clinker manufacturing apparatus. By adjusting the amount of gas extracted into the chlorine bypass section according to the prediction result, the formation of coating in the cement clinker manufacturing apparatus can be suppressed. Thus, stable operation of the cement clinker manufacturing apparatus can be continued for a long period of time.

[0014] In the prediction step described above, it is preferable to predict the presence or content of CFRP in the fuel based on the above information, and in the separation step described above, it is preferable to separate the third-fraction fuel containing CFRP from the fuel based on the prediction result. If a large amount of CFRP is introduced into the cement clinker manufacturing apparatus as fuel at once, unburned residue will be generated, making it easier for a short circuit to occur in the electrostatic precipitator installed in the cement clinker manufacturing apparatus. By separating the third-fraction fuel containing CFRP from the fuel, it is possible to suppress the instantaneous introduction of a large amount of CFRP into the cement clinker manufacturing apparatus by adjusting the amount of the third-fraction fuel introduced. As a result, even if the waste contains CFRP, cement clinker production can be continued in a sufficiently stable manner.

[0015] In the above prediction process, it is preferable to acquire the above information, including the fuel spectrum, using an optical identification device equipped with at least one light source selected from the group consisting of lasers, infrared rays, and X-rays, and a detector. This makes it possible to predict the calorific value of the fuel with high accuracy. By using multiple fuels separated based on the prediction results predicted with such high accuracy, operational fluctuations during cement clinker production can be further suppressed, and cement clinker production can be continued more stably.

[0016] The waste consists of two or more materials selected from the group consisting of plastic, paper, wood chips, stone, glass, metal, cloth, and leather. In the prediction process, it is preferable to irradiate the fuel with electromagnetic waves while it is being transported in the transport section. In the prediction process, the amount of heat generated is predicted using the information obtained by irradiating with electromagnetic waves. With this method, even if the waste consists of various materials and is being transported in the transport section, it can be smoothly separated according to the amount of heat generated. Therefore, the productivity of separated fuel and cement clinker can be sufficiently high.

[0017] The above sorting method preferably includes a crushing step to obtain fuel by crushing the waste before the prediction step. Furthermore, it is preferable that the particle size of the fuel irradiated with electromagnetic waves is 35 mm or less. The information obtained by irradiating fuel with electromagnetic waves tends to depend more on the surface than on the interior of the waste pieces. Therefore, by irradiating fuel containing crushed waste with small particle sizes with electromagnetic waves, more accurate prediction results can be obtained. By using multiple fuels sorted based on prediction results predicted with such high accuracy, operational fluctuations during cement clinker production can be sufficiently suppressed, and cement clinker production can be continued more stably.

[0018] In one aspect, the present invention provides a method for producing cement clinker, comprising a heating step of calcining cement raw materials in a calcination furnace and firing them in a cement kiln, wherein in the heating step, at least one of the cement kiln and the calcination furnace is heated using at least one of a plurality of fractionated fuels separated by any of the above-described separation methods.

[0019] In this manufacturing method, at least one of the multiple fractionated fuels separated by the above-described separation method is introduced into at least one of the cement kiln and the calcination furnace. Therefore, for example, the destination for each of the multiple fractionated fuels can be individually selected, or the amount introduced can be individually adjusted. Consequently, even if the calorific value of the waste fluctuates, operational fluctuations during cement clinker production can be suppressed by using fractionated fuels separated based on the predicted calorific value, and cement clinker production can be continued stably.

[0020] In the heating process described above, it is preferable to select the supply destination for each of the multiple fractionated fuels separated by the above-described separation method and adjust the supply amount based on the predicted calorific value of each of the multiple fractionated fuels. This makes it possible to stably continue the production of cement clinker even when using waste containing various components with significantly different calorific values ​​as fuel. Furthermore, it allows for more effective utilization of waste as fuel.

[0021] In the heating process described above, it is preferable to use the first fractional fuel as fuel for the cement kiln and the second fractional fuel as fuel for the calcination furnace. This allows for the effective use of the first fractional fuel, which has a high calorific value, as fuel for the cement kiln, thereby reducing the consumption of fossil fuels such as pulverized coal.

[0022] In the heating process described above, when changing the fuel used in the calcination furnace from the second fractional fuel to the first fractional fuel, it is preferable to reduce the amount of the first fractional fuel supplied compared to the amount of the second fractional fuel supplied. This reduces the change in calorific value due to the fractional fuel when changing the fuel introduced into the calcination furnace from the second fractional fuel to the first fractional fuel, thereby sufficiently suppressing fluctuations in the operation of the calcination furnace.

[0023] In the above manufacturing method, it is preferable to adjust the gas extraction amount of the chlorine bypass unit according to the prediction result of the chlorine content contained in the first sorted fuel. Accordingly, for example, when the prediction result of the chlorine content is likely to be higher than a threshold value, adjusting the gas extraction amount of the chlorine bypass unit can sufficiently suppress the occurrence of coating in the cement kiln. This makes it possible to sufficiently increase the supply amount of the first sorted fuel, thereby reducing the consumption of fossil fuels such as pulverized coal and effectively utilizing waste as fuel.

[0024] When the prediction result of the chlorine content of the first sorted fuel stored in a tank after sorting the fuel into a plurality of types exceeds a threshold value, it is preferable to supply the first sorted fuel stored in the tank to a calciner. This can sufficiently suppress the occurrence of coating in the cement kiln. Furthermore, the first sorted fuel can be introduced into the cement kiln within a range where the prediction result of the chlorine content does not exceed the threshold value. In this way, the occurrence of coating in the cement kiln can be sufficiently suppressed while effectively utilizing the first sorted fuel as fuel in the cement kiln.

[0025] In one aspect, the present invention provides a fuel sorting apparatus for producing cement clinker, comprising: a prediction device that irradiates an electromagnetic wave to a fuel containing waste, acquires information related to at least one selected from the group consisting of absorption, scattering and transmission of the electromagnetic wave, and predicts a calorific value using the information; and a sorting unit that sorts the fuel into a plurality of sorted fuels including at least the first sorted fuel and a second sorted fuel having a lower calorific value than the first sorted fuel based on the prediction result of the calorific value.

[0026] The above-described separation device includes a prediction device that acquires information obtained by irradiating the fuel with electromagnetic waves and uses this information to predict the calorific value, and a separation unit that separates the fuel into multiple components based on the prediction results. Therefore, in the production of cement clinker, fuel containing waste with various components can be smoothly separated according to the predicted calorific value. When producing cement clinker, the introduction positions of these separated fuels can be set separately or the introduction amounts can be adjusted individually based on the predicted calorific value. As a result, even when waste containing various components is used as fuel, operational fluctuations during the production of cement clinker are suppressed, and the production of cement clinker can be continued stably.

[0027] The sorting device described above comprises a crushing unit that crushes waste to obtain fuel, and a transport unit that transports the fuel crushed in the crushing unit. In the prediction device, it is preferable to irradiate the fuel with electromagnetic waves while transporting it in the transport unit. The information obtained by irradiating the fuel with electromagnetic waves tends to depend more on the surface than on the interior of the waste pieces. Therefore, if electromagnetic waves are irradiated onto the fuel containing small-particle waste crushed in the information acquisition unit, more accurate information can be obtained. Furthermore, since the above information can be obtained with high accuracy while transporting the waste, fuel sorting can be performed efficiently.

[0028] In one aspect, the present invention provides a cement clinker manufacturing apparatus comprising any of the above-described separation devices, a plurality of tanks for storing the plurality of separated fuels separated by the separation device, a calcination furnace, and a cement kiln, wherein the plurality of separated fuels stored in the plurality of tanks are used as fuel for at least one of the cement kiln and the calcination furnace.

[0029] In this manufacturing facility, at least one of the multiple fractionated fuels separated by the aforementioned separation device is used as fuel in at least one of the cement kiln and the calcination furnace. Therefore, for example, the destination for each of the multiple fractionated fuels can be individually selected, and the supply amount can be individually adjusted. Consequently, even when using waste containing various components, operational fluctuations during cement clinker production are suppressed, and cement clinker production can be continued stably.

[0030] In the cement clinker manufacturing facility described above, it is preferable to select the supply destination for each of the multiple separated fuels and adjust the supply amount based on the predicted calorific value of each of the multiple separated fuels separated by the separation device. This makes it possible to stably continue the production of cement clinker even when using waste containing various components with significantly different calorific values ​​as fuel. Furthermore, it allows for more effective utilization of waste as fuel.

[0031] In the cement clinker manufacturing facility described above, it is preferable that the first fractional fuel is supplied to the cement kiln from at least one of several tanks, and the second fractional fuel is supplied to the calcination furnace from at least one of several tanks different from the tank that supplies the first fractional fuel. By supplying the first and second fractional fuels from separate tanks in this way, it becomes possible to flexibly adjust the supply amounts of each. This makes it possible to continue cement clinker production more stably. [Effects of the Invention]

[0032] This invention provides a method for manufacturing cement clinker and a cement clinker manufacturing facility that enable the stable and continuous production of cement clinker even when using waste containing various components as fuel. Therefore, it becomes possible to utilize waste more effectively as fuel than before, and cement clinker with sufficiently reduced quality variations can be produced at a low manufacturing cost. Furthermore, this invention provides a method for separating fuel for cement clinker production and a fuel separation apparatus for cement clinker production that enables the stable and continuous production of cement clinker even when using waste containing various components as fuel. [Brief explanation of the drawing]

[0033] [Figure 1] This diagram schematically shows an example of a fuel separation device. [Figure 2] This flowchart shows an example of a prediction process in a fuel segregation method. [Figure 3] This is a block diagram showing an example of the hardware configuration of a prediction device. [Figure 4] This flowchart shows an example of a sorting process in a fuel sorting method. [Figure 5] This diagram schematically shows an example of a cement clinker manufacturing facility. [Modes for carrying out the invention]

[0034] Embodiments of the present invention will be described below, with reference to the drawings as appropriate. However, the following embodiments are illustrative examples for explaining the present invention and are not intended to limit the present invention to the following. In the description, the same reference numerals will be used for elements that are the same or have the same function, and redundant explanations will be omitted as appropriate. Furthermore, unless otherwise specified, positional relationships such as up, down, left, and right will be based on the positional relationships shown in the drawings. Moreover, the dimensional ratios of each element are not limited to the ratios shown in the drawings.

[0035] A method for separating fuel for cement clinker production according to one embodiment includes: a crushing step of crushing waste to obtain fuel; a prediction step of irradiating the fuel with electromagnetic waves while conveying the fuel in a conveying unit, obtaining information on at least one selected from the group consisting of absorption, scattering, and transmission of electromagnetic waves, and using the information to predict the calorific value of the fuel; and a separation step of separating the fuel into a plurality of fractional fuels, including a first fractional fuel and a second fractional fuel having a lower calorific value than the first fractional fuel, based on the predicted calorific value.

[0036] The waste materials used as fuel contain a variety of components. Specifically, these include plastics, paper, wood chips, stone, metal, and cloth. Of these, plastics have a relatively high calorific value, with some types exceeding 5000 kcal / kg. For example, polypropylene (PP), polyethylene (PE), and polystyrene (PS) have a calorific value of 9000-11000 kcal / kg. Polyurethane (PU) has a calorific value of approximately 7000 kcal / kg, epoxy resin approximately 7500 kcal / kg, phenolic resin approximately 8000 kcal / kg, and polyethylene terephthalate (PET) approximately 5500 kcal / kg.

[0037] On the other hand, among plastics with a calorific value of less than 5000 kcal / kg, polyvinyl chloride (PVC) has a calorific value of 4000-5000 kcal / kg, and polyvinylidene chloride (PVDC) has a calorific value of approximately 2500 kcal / kg. The calorific value of waste components other than plastics is usually less than 5000 kcal / kg. With the above sorting method, fuel containing various waste components can be separated into multiple types, thereby obtaining multiple separated fuels with different calorific values.

[0038] Figure 1 shows an example of a sorting device for implementing the sorting method of this embodiment. The sorting device 100 in Figure 1 is a fuel sorting device for cement clinker production and includes a crushing unit 10 that crushes waste to obtain fuel containing waste, a prediction device 20 that transports the fuel containing waste in a transport unit while irradiating it with electromagnetic waves to acquire information on at least one selected from the group consisting of absorption, scattering, and transmission of electromagnetic waves, and uses this information to predict the calorific value, and a sorting unit 40 that sorts the fuel into a plurality of sorted fuels, including at least a first sorted fuel and a second sorted fuel with a lower calorific value than the first sorted fuel, based on the calorific value prediction result. It should be noted that it is not essential to perform the above sorting method using this sorting device, and it may be performed using a different sorting device. Furthermore, the above sorting device may be configured to sort the fuel using a sorting method different from the sorting method described above.

[0039] The crushing process can be carried out, for example, in the crushing section 10. Examples of crushers that can be provided in the crushing section 10 include mills, shredders, and crushers. The crushing section 10 obtains fuel with a particle size of, for example, 35 mm or less. By irradiating the fuel crushed to this size with electromagnetic waves, the prediction device 20 can obtain prediction results with sufficiently high accuracy. From the viewpoint of obtaining prediction results with even higher accuracy, the particle size of the fuel may be 30 mm or less, or 25 mm or less. The particle size of the fuel can be determined as the diameter of the circumscribed circle that circumscribes the fuel as depicted in a two-dimensional image. Upstream of the crushing section 10, a coarse crusher, wind separator, magnetic separator, etc., may be installed to remove metals and other materials from the waste raw material. Performing the crushing process is not mandatory; the received waste can be transported directly in the transport section 12 and the prediction process by the prediction device 20 may be performed.

[0040] The prediction process can be performed, for example, by a prediction device 20. The prediction device 20 includes a light source 22 that irradiates the fuel with electromagnetic waves while the fuel is being transported by a transport unit 12, a detector 24 that detects information obtained by irradiating with electromagnetic waves, and an information processing unit 25 that processes the information to derive a predicted value for the calorific value of the fuel and outputs a control signal according to the predicted value. In a prediction device 20 having such a device configuration, the predicted value is derived according to the flowchart shown in Figure 2 as an example. In this example, electromagnetic waves are irradiated onto the fuel (S1), at least one piece of information selected from the group consisting of absorption, scattering, and transmission of electromagnetic waves is obtained (S2), and the contained components, component content, and calorific value are predicted by processing the information (S3, S4, S5). In this case, the contained components and component content may be predicted from the information, and the calorific value may be predicted from the prediction result. This makes it possible to predict the calorific value with sufficiently high accuracy. "Predicting calorific value using information" includes not only directly predicting calorific value from the above information, but also, as described above, predicting other information or values ​​such as contained components and component content from the above information, and then predicting calorific value through the results of that prediction.

[0041] An example of the hardware configuration of the prediction device 20 is shown in Figure 3 and includes a circuit 70. The circuit 70 has at least one processor 72, memory 74, storage 76, and input / output ports 78. Computer software for realizing each function may be stored in the storage 76. The information processing unit 25 may be configured to load such computer software onto the hardware, such as the processor 72 and memory 74, so that the input / output ports 78 and input / output devices 82 operate under the control of the processor 72. The storage 76 may be a computer-readable recording medium such as a hard disk, non-volatile semiconductor memory, magnetic disk, or optical disk.

[0042] Memory 74 temporarily stores programs loaded from storage 76 and calculation results from processor 72. Processor 72 works in cooperation with memory 74 to execute a program that predicts the components, component content, and calorific value of fuel 11, for example, using information acquired by information acquisition unit 80. Input / output ports 78 perform input and output of electrical signals between the control unit 30 and input / output devices 82, etc., in response to commands from processor 72. The prediction results obtained by executing the program are output to the control unit 30. The prediction device 20 can be configured as a normal computer system.

[0043] The prediction device 20 is a machine machine The predictive model may be input from the learning device, or the predictive device itself may perform machine learning to create the predictive model. Examples of machine learning methods include neural networks, linear regression, and decision trees. Of these, neural networks are preferred from the viewpoint of performing highly accurate predictions. When using machine learning, the model should be trained using training data which consists of a combination of at least one piece of information selected from the group consisting of electromagnetic wave absorption, scattering, and transmission of various fuels 11, and the amount of heat generated (or component content).

[0044] The predictive model (program) is not limited to those created by machine learning; for example, it may be created by statistical methods. Examples of statistical methods include multivariate analysis. The predictive model (program) created by machine learning or statistical methods is executed, and for example, the spectral patterns acquired by the detector 24 and the spectral patterns stored in the database are analyzed based on the similarity of the entire data range. In this way, the components, component content, and calorific value of the fuel 11 can be predicted.

[0045] The prediction method in the prediction device 20 is not limited to the method described above. For example, the components, component content, and calorific value of the fuel 11 may be predicted by focusing on one or more peaks that characterize the type of component from the information such as the spectrum acquired by the detector 24, and using a threshold. For example, if no spectrum is obtained even when electromagnetic waves are irradiated, the predicted calorific value may be determined to be less than the threshold (e.g., 5000 kcal / kg) and separated. Even if the material is identified as paper and wood chips, the predicted calorific value may be determined to be less than the threshold (e.g., 5000 kcal / kg). In other words, the prediction of calorific value does not necessarily have to be predicted as a specific numerical value, and the prediction result may be "greater than or equal to the threshold" or "less than the threshold". There may be multiple thresholds.

[0046] The electromagnetic waves emitted from the light source 22 of the prediction device 20 can be from various wavelength ranges, such as gamma rays, X-rays, ultraviolet rays, infrared rays, and microwaves. One of these may be used, or two or more may be used in combination. Of these, infrared rays are preferred, and near-infrared rays are more preferred, from the viewpoint of accurately predicting the amount of heat generated by plastics. In this specification, infrared rays include near-infrared rays, mid-infrared rays, and far-infrared rays.

[0047] From the viewpoint of detecting CFRP among the components contained in fuel 11 with high accuracy, a laser and electromagnetic waves other than lasers may be used in combination. The information (signal) acquired by the detector 24 may be waveform data such as spectra. Such waveform data may be based on any of the physical phenomena of absorption, scattering, and transmission by electromagnetic waves. Specific examples of waveform data include, for example, infrared absorption spectra, X-ray transmittance, and Raman scattering spectra.

[0048] The information processing unit 25 analyzes at least one piece of information selected from the group consisting of emission, absorption, scattering, and transmission of electromagnetic waves acquired by the detector 24 by comparing it with information in a database pre-stored in the storage 76 to determine the components of the fuel 11 and predict the components, component content, and calorific value. At this time, the predicted value of calorific value (prediction result) may be derived from the predicted value of component content (prediction result), or the predicted value of calorific value may be derived without deriving the predicted value of component content. It is sufficient to predict the presence or absence of some components and / or their component content, rather than predicting all of the components of the fuel 11.

[0049] The prediction of the constituent components (S3) may be performed by comparing information such as the spectral waveform obtained by the detector 24 with information in the database stored in the storage 76. The constituent components of the fuel 11 may be classified into three categories: plastic (excluding CFRP), CFRP, and others.

[0050] The prediction of component content (S4) and calorific value (S5) may be performed using information such as the count number of each component within the measurement range, or the spectral intensity corresponding to each component, acquired by the detector 24, and the count number or spectral intensity data contained in the database stored in the storage 76. If a predicted value for the content of each type of plastic is obtained, the predicted value for the calorific value can be derived by multiplying it by the calorific value specific to each plastic. In addition, the chlorine content of fuel 11 can be predicted by multiplying the predicted value for the content of chlorine-containing plastics by the chlorine concentration specific to that plastic. The CFRP content of fuel 11 can also be predicted in the same way. Such predictions of component content (S3), component content (S4), and calorific value (S5) may be performed using the prediction model (program) described above.

[0051] When infrared radiation is used as the electromagnetic wave emitted from the light source 22, information for predicting the components and heat generation of the fuel 11 can be obtained as follows. The molecules constituting the fuel 11 (e.g., CH, OH) are in various motions, and when infrared radiation is shone on moving molecules, only light of specific wavelengths is absorbed according to their motion. In other words, when infrared radiation is shone on a substance with a fixed molecular structure (e.g., polyethylene), the wavelengths absorbed are fixed values ​​unique to that substance. Therefore, by detecting the light reflected from the fuel 11 and determining the light intensity for each wavelength, an optical absorption spectrum (wavelength distribution) can be obtained. For example, if the fuel 11 contains polyethylene, an absorption spectrum with characteristic peaks around wavelengths of 1200 nm, 1400 nm, 1725 nm, 1775 nm, and 1850 nm can be obtained.

[0052] The light source 22 and detector 24 constitute an information acquisition unit 80 (optical identification device) that acquires information used to predict the contained components, component content, and heat generation. The information acquisition unit 80 uses, for example, a light source 22 that emits light having wavelengths in the near-infrared region (750-2500 nm) and a detector 24 equipped with a hyperspectral camera (e.g., manufactured by RESONON) to acquire the near-infrared absorption spectrum of the fuel 11 containing plastic being transported by a transport unit 12 such as a belt conveyor. The type (components) of the plastic is predicted from the acquired spectrum, and the component content is predicted from the spectral intensity. The fuel 11 may contain a wide variety of plastics. For this reason, spectra of various plastics, paper, wood chips, stone, glass, cloth, and leather may be acquired in advance to build a spectrum database and stored in the storage 76. This allows the measured spectrum and the spectral patterns stored in the storage 76 to be compared, and pattern recognition can be performed based on similarity. Using this method, the information processing unit 25 may predict the contained components and predict the component content and heat generation of the fuel 11. A predictive model for predicting the contained components, component content, and calorific value may be constructed using the machine learning or statistical methods described above, and the information processing unit 25 may use this predictive model to predict the contained components, component content, and calorific value.

[0053] The information acquisition unit 80 may, for example, use a laser as the light source 22 and acquire a Raman scattering spectrum as information. The information processing unit 25 may derive predicted values ​​for the amount of contained components and the amount of heat generated from this information. When laser light of a specific wavelength is irradiated onto the fuel 11, scattered light is observed. Raman scattered light is observed as light with a different wavelength from the laser light (incident light) incident on the fuel 11. The wavelength difference between the incident light and the scattered light is called the Raman shift, and the shift width depends on the normal vibration of the molecules contained in the fuel 11. Therefore, similar to the case where infrared light is used as the light source, the information acquisition unit 80 can acquire a Raman scattering spectrum corresponding to the material of the fuel 11 as information.

[0054] The information acquisition unit 80 may, for example, use a high-power semiconductor laser capable of emitting light with a wavelength of approximately 500 to 800 nm (532 nm, 785 nm, etc.) as the light source 22, and a multi-channel spectrometer as the detector 24. In this way, the Raman scattering spectrum of the fuel 11 may be acquired as information. In this case as well, the material of the fuel 11 can be determined (identified) from the spectral pattern, and predicted values ​​of component content and heat generation can be derived from the spectral intensity. The derivation method may be the same as when infrared light is used as the light source.

[0055] In the information acquisition unit 80, for example, X-rays may be used as electromagnetic waves irradiated from the light source 22, and transmitted X-ray analysis may be performed. When X-rays of a specific intensity are irradiated onto the fuel 11 and the intensity of the X-rays transmitted through the fuel 11 is measured, the intensity of the transmitted X-rays will decrease by the amount of X-rays absorbed by the fuel 11. The amount of X-ray absorption varies depending on the density of elements and substances contained in the fuel 11. The more elements with higher atomic numbers are present, the greater the amount of X-ray absorption. By utilizing this property, it is possible to identify the components contained in the fuel 11 and obtain information for predicting the component content and heat generation.

[0056] For example, a tungsten target X-ray tube can be used as the light source 22. An X-ray sensor can be used as the detector 24. The identification of the contained components and the derivation of predicted values ​​can be performed in the same manner as when infrared light is used as the light source.

[0057] The presence or absence of CFRP (carbon fiber reinforced plastic) may be determined by the presence or absence of specific plastics that make up the CFRP, or by the presence or absence of carbon fibers in the CFRP. Examples of specific plastics that make up CFRP include epoxy resin, phenolic resin, and polyester resin. When carbon fibers are irradiated with a 500-800 nm laser, they produce 1350 cm³. -1 and 1600cm -1 A peak is detected in the vicinity. Fuel 11 in which such a peak is detected may be determined to contain CFRP.

[0058] The prediction device 20 outputs the predicted results (predicted values) of the contained components, component content, and calorific value to the control unit 30. Based on the input values ​​from the prediction device 20, the control unit 30 outputs control signals to operate the dampers 41, 42, and 43 in Figure 1. The control unit 30, like the information processing unit 25, may have, for example, a processor, memory, storage, and input / output ports. The control unit 30 only needs to have a configuration that can derive and output control signals. It is not necessary to configure the prediction device 20 and the control unit 30 as separate hardware; they may be configured as a single piece of hardware.

[0059] The sorting process can be carried out in the sorting unit 40. The sorting unit 40 includes dampers 41, 42, and 43 connected to the transport unit 12, a tank 51 for storing the first fractionated fuel, a tank 52 for storing the second fractionated fuel, and a tank 53 for storing the third fractionated fuel. In this example, the fuel 11 is sorted into three parts. The number of fractionated fuels to be sorted is not particularly limited; the fuel 11 may be sorted into two parts or into four or more parts according to the predicted calorific value.

[0060] The first fractional fuel stored in tank 51 is, for example, fuel with a predicted calorific value of 5000 kcal / kg or more. The second fractional fuel is, for example, fuel with a predicted calorific value of less than 5000 kcal / kg. The threshold for the predicted calorific value of the first and second fractional fuels is not limited to 5000 kcal / kg. However, by setting the threshold to 5000 kcal / kg, a sufficiently large amount of fuel can be introduced into the cement kiln. This makes it possible to effectively utilize waste as fuel and reduce the consumption of fossil fuels such as pulverized coal used as fuel for the cement kiln.

[0061] The third fractional fuel stored in tank 53 contains CFRP. The first and second fractional fuels may also contain small amounts of CFRP. In this case, the CFRP content of the third fractional fuel is higher than that of the first and second fractional fuels. Because CFRP is difficult to burn, introducing a large amount at once into the cement clinker manufacturing equipment results in unburned residue. As shown in Figure 1, by fractionating a fuel with a higher CFRP content than the other fractional fuels as the third fractional fuel, it is possible to supply CFRP to the cement kiln in small amounts, thereby suppressing unburned CFRP. This allows for stable and continuous operation of the electrostatic precipitator installed in the cement clinker manufacturing equipment.

[0062] In one example of the sorting process, the fuel is sorted into three parts in the sorting unit 40 according to the flowchart shown in Figure 4. Before sorting begins, dampers 41, 42, and 43 are closed (S11). In this state, it is determined whether or not the fuel contains CFRP based on the result of the prediction of the contained components (S3). If it is determined that it contains CFRP, damper 43 is opened (S13), and the third sorted fuel is introduced into tank 53 (S14). On the other hand, if it is determined that it does not contain CFRP, it is determined whether or not the result of the prediction of the calorific value (S5) (predicted value) is above the threshold (5000 kcal / kg) (S15).

[0063] If the predicted calorific value is 5000 kcal / kg or more, damper 41 is opened (S16) and the fuel is introduced into tank 51 as the first fractional fuel (S17). If the predicted calorific value is less than 5000 kcal / kg, damper 42 is opened (S18) and the fuel is introduced into tank 52 as the second fractional fuel (S19). In this way, the fuel is separated into three fractional fuels according to the predicted results of the contained components and the predicted results of the calorific value. These multiple fractional fuels are temporarily stored in tanks 51, 52, and 53 and can then be used as fuel in the cement clinker manufacturing plant. At that time, the multiple fractional fuels can be introduced to different locations, or the amount introduced can be adjusted individually. Therefore, while maintaining the stable operation of the cement clinker manufacturing plant, it is possible to effectively utilize waste as fuel and reduce the amount of fossil fuels used.

[0064] By predicting the chlorine content using the prediction device 20, the chlorine content of the first, second, and third fractionated fuels after separation can also be predicted. Depending on the predicted chlorine content of the first fractionated fuel, the amount of gas extracted from the chlorine bypass section in the cement clinker manufacturing apparatus may be adjusted. This makes it possible to suppress the occurrence of coating in the cement kiln while sufficiently suppressing the decrease in fuel consumption caused by excessive gas extraction.

[0065] In the example shown in Figure 4, the fuel is separated into third-class fractional fuel and other fractional fuels depending on the presence or absence of CFRP, but this is not limited to this. For example, the CFRP content may be predicted during the component content prediction (S3), and if the prediction result is above a threshold, it may be separated into tank 53, and if it is below the threshold, it may be separated into tank 51 or tank 52 according to the calorific value.

[0066] As shown in Figure 1, tanks 51, 52, and 53 are connected to outlets 51a, 52a, and 53a, respectively. The first, second, and third fractionated fuels, once stored in tanks 51, 52, and 53, may be transported through outlets 51a, 52a, and 53a to the downstream cement clinker manufacturing plant. Transport may be carried out by a belt conveyor, gas (air) pressure transport, or gravity. If the fractionation device 100 and the cement clinker manufacturing plant are in different locations, each fractionated fuel discharged from the tanks may be transported by truck to the tank located at the cement clinker manufacturing plant's installation site. Not all of the fractionated fuels are to be used as fuel for the cement clinker manufacturing plant. One type of fractionated fuel, or a portion of each fractionated fuel, may be used for other purposes.

[0067] A method for producing cement clinker according to one embodiment includes a heating step in which cement raw materials are calcined in a calcination furnace and then fired in a cement kiln, wherein at least one of the cement kiln and the calcination furnace is heated using at least one of the fractionated fuels (first fractionated fuel, second fractionated fuel, and third fractionated fuel) which contain waste separated into multiple parts by the above-described separation method.

[0068] The cement clinker manufacturing equipment 300 shown in Figure 5 may be used to carry out the above-described method for manufacturing cement clinker. However, it is not mandatory to carry out the above-described method using this cement clinker manufacturing equipment; it may be carried out using other cement clinker manufacturing equipment. Furthermore, the cement clinker manufacturing equipment may be configured to produce cement clinker using a manufacturing method different from the cement clinker manufacturing method described above.

[0069] The cement clinker manufacturing facility 300 in Figure 5 comprises a fuel separation device 100 and a cement clinker manufacturing device 200. The cement clinker manufacturing device 200 comprises an inlet 201 into which cement raw materials are introduced, four cyclones C1, C2, C3, C4 (preheaters) for preheating the cement raw materials introduced from the inlet 201, a calcination furnace 230 for calcining the cement raw materials, a cement kiln 240 for firing the preheated and calcined cement raw materials to produce cement clinker, and a clinker cooler 250 for cooling the cement clinker produced in the cement kiln 240 and for dischargering the cooled cement clinker.

[0070] The inlet 201 is located at the connection point between cyclone C1 and cyclone C2. The cement raw materials introduced from the inlet 101 may include at least one selected from the group consisting of, for example, incinerated ash, coal ash, limestone, iron source, slag, and waste. The cement raw materials introduced from the inlet 201 are heated as they flow through cyclone C1, cyclone C2, cyclone C3, rising duct 234, calcination furnace 230, and cyclone C4, and are introduced into the kiln end 242 of the cement kiln 240.

[0071] The kiln end 242 of the cement kiln 240 and the calcination furnace 230 are connected by a rising duct 234. An extraction pipe 236 is connected to the rising duct 234 to extract the kiln exhaust gas from within the rising duct 234. Downstream of the extraction pipe 236, a chlorine bypass section 237 equipped with a cooler and a bag filter is installed to recover dust contained in the extracted gas (kiln exhaust gas) extracted by the extraction pipe 236. After the dust has been removed in the chlorine bypass section 237, the gas is introduced into a circulating gas line 252 that connects to the clinker cooler 250 and the calcination furnace 230, and then into the calcination furnace 230. By having a chlorine bypass section 237, volatile components such as chlorine compounds and alkalis can be reduced from within the cement clinker manufacturing apparatus 200. In the modified example, the extraction pipe 236 may be connected to the kiln end 242, or it may be connected to the boundary between the rising duct 234 and the kiln end 242.

[0072] The temperature inside the cement kiln 240 is, for example, 1400°C to 1500°C. A burner 244, located at one end of the cement kiln 240, is supplied with first-fractionated fuel and fossil fuel from the tank 51. As fossil fuel, pulverized coal, heavy oil, etc., can be used. In this embodiment, since the first-fractionated fuel, which includes waste, has a high calorific value, the ratio of first-fractionated fuel to fossil fuel can be made sufficiently high. Therefore, the amount of fossil fuel used can be reduced. Furthermore, the calorific value of the first-fractionated fuel fluctuates less than that of the waste before separation. Therefore, stable operation of the cement clinker manufacturing apparatus 200 can be maintained while using a sufficient amount of first-fractionated fuel as fuel. From the viewpoint of further stabilizing the operation of the cement clinker manufacturing apparatus 200, the calorific value (measured value) of the first-fractionated fuel is preferably 5000 kcal / kg or more. This allows for a sufficient reduction in the variation in the quality of the resulting cement clinker. Note that the calorific value in this specification refers to the lower heating value.

[0073] The operation of the cement kiln 240 may be controlled by a measuring unit M that measures the torque or power consumption of the rotating motor when rotating the cement kiln 240, an adjustment unit 222 that adjusts the amount of fossil fuel supplied, and a control unit 224 that outputs a control signal to adjust the adjustment unit 222 based on the measured value of the measuring unit M. In this case, the first fractionated fuel may be introduced into the burner 244 in the maximum amount possible within the range in which the operation of the cement kiln 240 can be controlled. In this case, the amount of fossil fuel supplied should be adjusted so that the measured value of the measuring unit M falls within the target range. This makes it possible to continue stable operation of the cement kiln 240 while effectively utilizing the first fractionated fuel. However, in a modified example, the amount of first fractionated fuel introduced into the burner 244 may be adjusted by a flow rate adjustment unit 51V according to the predicted calorific value of the first fractionated fuel and / or the operating status of the cement kiln 240. Also, the first fractionated fuel and the fossil fuel may be introduced into different burners.

[0074] The temperature inside the calcination furnace 230 is, for example, 850°C to 900°C. The calcination furnace 230 is supplied with a second fractional fuel containing waste and fossil fuel from the tank 52. As fossil fuel, pulverized coal, heavy oil, etc., can be used. Since the calcination furnace 230 is at a lower temperature than the cement kiln, even if a second fractional fuel with a lower calorific value than the first fractional fuel is introduced, the temperature of the calcination furnace 230 can be maintained sufficiently stably.

[0075] The operation control of the calcination furnace 230 may be performed by a measuring unit T that measures the temperature of the calcination furnace 230, a control unit 231 that adjusts the amount of fossil fuel supplied, and a control unit 232 that outputs a control signal to adjust the control unit 231 based on the measurement value of the measuring unit T. In this case, the second fractional fuel may be introduced into the calcination furnace 230 in the maximum amount possible within the range in which the operation control of the calcination furnace 230 is possible. The amount of fossil fuel supplied is then adjusted so that the measurement value of the measuring unit T maintains a target range. This makes it possible to effectively utilize the second fractional fuel as fuel for the calcination furnace 230 while continuing stable operation of the calcination furnace 230. However, in a modified example, the amount of second fractional fuel introduced into the calcination furnace 230 may be adjusted by a flow rate adjustment unit 52V according to the predicted calorific value of the second fractional fuel and / or the operating status of the calcination furnace 230. The second fractional fuel and fossil fuel may each be introduced into burners attached to the calcination furnace 230 and burned within the calcination furnace 230.

[0076] By controlling the flow rate adjustment units 51V and 52V, the first fractionated fuel and the second fractionated fuel may be introduced into the cement clinker manufacturing apparatus 200 at a constant flow rate ratio. This allows for sufficient stabilization of the operation of the cement clinker manufacturing apparatus 200.

[0077] In one example, the third fractional fuel, which includes waste (CFRP), can be drawn in a fixed amount from tank 53 and introduced into burner 244 for combustion in cement kiln 240. In the example shown in Figure 5, the third fractional fuel drawn from tank 53 merges with the first fractional fuel and is introduced into burner 244. The amount of the third fractional fuel introduced may be adjusted by the flow rate control unit 53V. This reduces the temporal fluctuation in the amount of the third fractional fuel introduced into burner 244, suppressing the occurrence of unburned CFRP (carbon fiber). This suppresses the occurrence of short circuits in the electrostatic precipitator that collects solid matter contained in the exhaust gas discharged from above cyclone C1. In a modified example, the third fractional fuel and the first fractional fuel may be introduced into different burners.

[0078] The flow rate adjustment units 51V, 52V, and 53V may each consist of a valve and a control unit (not shown) that controls the opening degree of the valve. For example, the supply amount may be measured using a load cell and an impact line flow meter, and the flow rate of each fractionated fuel may be adjusted by feedback control. The flow rate adjustment units 51V, 52V, and 53V are not particularly limited as long as they are configured to adjust the flow rates of the first fractionated fuel, the second fractionated fuel, and the third fractionated fuel.

[0079] The destination of the first fractionated fuel may be switched from burner 244 to calcination furnace 230 (or a burner attached to calcination furnace 230) depending on the operating status of the cement clinker manufacturing apparatus 200 and the inventory balance of the first fractionated fuel and the second fractionated fuel. For example, if the predicted value of the chlorine content of the first fractionated fuel is higher than a threshold (e.g., 1.5 mass%), the destination of the first fractionated fuel may be switched from burner 244 to calcination furnace 230 (or a burner attached to calcination furnace 230). This can suppress the occurrence of coating due to a high chlorine concentration in the cement kiln 240. The switching of the destination of the first fractionated fuel can be performed, for example, by operating the three-way valve 51T based on a control signal from the control unit 30. The control unit 30 outputs a control signal to operate the three-way valve 51T based on the predicted value of the chlorine concentration by the prediction device 20.

[0080] The amount of gas extracted from the chlorine bypass section 237 may be adjusted according to the predicted chlorine content of the first fractionated fuel. This allows the amount of gas extracted to be adjusted to a range that suppresses the formation of coating on the cement kiln 240. Therefore, excessive extraction of kiln exhaust gas from the chlorine bypass section 237 is suppressed, and the fuel consumption of the cement clinker manufacturing apparatus 200 can be reduced.

[0081] The total amount of chlorine brought into the cement clinker manufacturing apparatus 200 may be derived from the predicted chlorine content of each fractional fuel and the flow rate of each fractional fuel introduced into the cement clinker manufacturing apparatus 200. If this total amount exceeds a threshold (e.g., 10 kg / h), the gas extraction rate from the chlorine bypass section 237 may be increased. This reduces the amount of chlorine circulating in the cement kiln 240 and suppresses the formation of coatings in cyclone C1, cyclone C2, cyclone C3, rising duct 234, calcination furnace 230, and cyclone C4. If increasing the gas extraction rate alone is insufficient, the supply of fractional fuels may be reduced and the supply of fossil fuels increased.

[0082] When changing the fuel used in the calcination furnace 230 from the second fractional fuel to the first fractional fuel, it is preferable to introduce the first fractional fuel into the calcination furnace 230 in a smaller amount than the amount of the second fractional fuel introduced. Since the first fractional fuel has a higher calorific value than the second fractional fuel, this adjustment can sufficiently suppress temperature fluctuations in the calcination furnace 230.

[0083] According to the cement clinker manufacturing method and cement clinker manufacturing equipment of this embodiment, since fuel containing waste with various components is separated based on the predicted calorific value and the separated fuel is used, cement clinker production can be stably continued. Furthermore, flexible operation adjustments are possible by changing the introduction destination of each separated fuel or adjusting the introduction amount depending on the operating status of the cement clinker manufacturing equipment. As a result, variations in cement clinker quality can be sufficiently reduced. Moreover, the consumption of fossil fuels can be reduced and waste can be effectively utilized.

[0084] Although several embodiments of this disclosure have been described above, this disclosure is not limited to the above embodiments. For example, the cement clinker manufacturing equipment shown in Figure 5 includes a separation device 100, but is not limited thereto. For example, it may include a separation device that separates fuel into two or four or more separate fuels. The description of the fuel separation device also applies to the fuel separation method, and the description of the fuel separation method also applies to the fuel separation device. The description of the cement clinker manufacturing equipment also applies to the cement clinker manufacturing method, and the description of the cement clinker manufacturing method also applies to the cement clinker manufacturing equipment. [Explanation of Symbols]

[0085] 10...Crushing unit, 11...Fuel, 12...Conveying unit, 20...Prediction device, 22...Light source, 24...Detector, 25...Information processing unit, 30, 224, 232...Control unit, 40...Separation unit, 41, 42, 43...Damper, 51, 52, 53...Tank, 51T...Three-way valve, 51V, 52V, 53V...Flow rate adjustment unit, 51a, 52a, 53a...Outlet path, 70...Circuit, 72...Processor, 74...Memory, 76...Storage, 78...Input / output port, 80...Information acquisition unit, 82... Input / output devices, 100... Separation device, 101... Inlet, 200... Cement clinker manufacturing equipment, 201... Inlet, 222... Adjustment section, 230... Calcination furnace, 231... Adjustment section, 234... Rising duct, 236... Extraction pipe, 237... Chlorine bypass section, 240... Cement kiln, 242... Kiln end, 244... Burner, 250... Clinker cooler, 252... Circulation gas line, 300... Cement clinker manufacturing equipment, C1, C2, C3, C4... Cyclone.

Claims

1. A method for producing cement clinker, which involves calcining cement raw materials in a calcination furnace and firing them in a cement kiln, A prediction step involves irradiating a fuel containing waste with electromagnetic waves, obtaining information on at least one selected from the group consisting of absorption, scattering, and transmission of the electromagnetic waves, and predicting the calorific value of the fuel using this information and a calorific value prediction model created in advance by machine learning or statistical methods. A fractionation step of fractionating the fuel into a plurality of fractionated fuels, including a first fractionated fuel and a second fractionated fuel having a lower calorific value than the first fractionated fuel, based on the predicted calorific value. The heating step includes heating the cement kiln and the calcination furnace using at least one of the plurality of separated fuels separated in the separation step, In the heating step, based on the predicted calorific value of each of the multiple separated fuels separated in the separation step, the supply destination for each of the multiple separated fuels is selected and the supply amount is adjusted. The second fractional fuel is used as fuel for the calcination furnace. A method for producing cement clinker, comprising changing the fuel used in the calcination furnace from the second fractional fuel to the first fractional fuel, wherein the supply amount of the first fractional fuel is less than the supply amount of the second fractional fuel.

2. A method for producing cement clinker, comprising calcining cement raw materials in a calcination furnace and firing them in a cement kiln, A prediction step involves irradiating a fuel containing waste with electromagnetic waves, obtaining information on at least one selected from the group consisting of absorption, scattering, and transmission of the electromagnetic waves, and predicting the calorific value of the fuel using this information and a calorific value prediction model created in advance by machine learning or statistical methods. A fractionation step of fractionating the fuel into a plurality of fractionated fuels, including a first fractionated fuel and a second fractionated fuel having a lower calorific value than the first fractionated fuel, based on the predicted calorific value. The heating step includes heating the cement kiln and the calcination furnace using at least one of the plurality of separated fuels separated in the separation step, Based on the above information, predict the chlorine content of at least one of the separated fractional fuels. In the heating step, based on the predicted calorific value of each of the multiple separated fuels separated in the separation step, the supply destination for each of the multiple separated fuels is selected and the supply amount is adjusted. A method for producing cement clinker, comprising: separating the fuel into multiple fractions; if the predicted chlorine content of the first fractionated fuel stored in the tank is below a threshold, the first fractionated fuel is used as fuel for the cement kiln; and if the predicted chlorine content exceeds a threshold, the first fractionated fuel stored in the tank is supplied to the calcination furnace.

3. The method for producing cement clinker according to claim 1, wherein in the heating step, the first fractionated fuel is used as fuel for the cement kiln.

4. The method for producing cement clinker according to claim 2, wherein in the heating step, the second fractionated fuel is used as fuel for the calcination furnace.

5. A method for producing cement clinker according to claim 2, wherein in the heating step, the second fractional fuel is used as the fuel for the calcination furnace, and when changing the fuel used in the calcination furnace from the second fractional fuel to the first fractional fuel, the amount of the first fractional fuel supplied is less than the amount of the second fractional fuel supplied.

6. A method for producing cement clinker according to claim 1 or 3, wherein the chlorine content of at least one of the plurality of separated separated fuels is predicted based on the aforementioned information.

7. A method for producing cement clinker according to any one of claims 1 to 6, wherein the amount of gas extracted from the chlorine bypass section is adjusted according to the predicted result of the chlorine content contained in the first fractionated fuel.

8. A method for producing cement clinker according to claim 1 or 3, wherein, after separating the fuel into multiple parts, if the predicted chlorine content of the first fractionated fuel stored in the tank exceeds a threshold, the first fractionated fuel stored in the tank is supplied to the calcination furnace.

9. The method for producing cement clinker according to any one of claims 1 to 8, wherein the first fractionated fuel has a calorific value of 5,000 kcal / kg or more.

10. In the prediction step, the presence or content of CFRP in the fuel is predicted based on the information, A method for producing cement clinker according to any one of claims 1 to 9, wherein in the separation step, a third fractional fuel containing CFRP is separated from the fuel based on the prediction result.

11. A method for producing cement clinker according to any one of claims 1 to 10, wherein in the prediction step, the information including the spectrum of the fuel is acquired using an optical identification device comprising at least one light source selected from the group consisting of lasers, infrared rays, and X-rays, and a detector.

12. The aforementioned waste includes two or more items selected from the group consisting of plastic, paper, wood chips, stone, glass, metal, cloth, and leather. The method for producing cement clinker according to any one of claims 1 to 11, wherein in the prediction step, the electromagnetic waves are irradiated while the fuel is being transported in the transport unit.

13. A method for producing cement clinker according to any one of claims 1 to 12, comprising a crushing step of crushing the waste to obtain the fuel before the prediction step.

14. A method for producing cement clinker according to any one of claims 1 to 13, wherein the particle size of the fuel irradiated with the electromagnetic waves is 35 mm or less.

15. A fuel separation apparatus for cement clinker production, comprising: a prediction device that irradiates fuel containing waste with electromagnetic waves to obtain information on at least one selected from the group consisting of absorption, scattering, and transmission of the electromagnetic waves, and predicts the calorific value of the fuel using said information and a calorific value prediction model created in advance by machine learning or statistical methods; and a separation unit that separates the fuel into a plurality of fractional fuels, including a first fractional fuel and a second fractional fuel having a lower calorific value than the first fractional fuel, based on the calorific value prediction result, Multiple tanks for storing the multiple separated fuels separated by the separation device, Temporary furnace and Equipped with a cement kiln, The plurality of fractional fuels stored in each of the plurality of tanks are configured to be used as fuel in at least one of the cement kiln and the calcination furnace. Based on the predicted calorific value of each of the plurality of separated fuels separated by the separation device, the supply destination for each of the plurality of separated fuels is selected and the supply amount is adjusted. The configuration is such that the second fractional fuel is supplied to the calcination furnace from at least one of the plurality of tanks, A cement clinker manufacturing facility configured such that, when changing the fuel used in the calcination furnace from the second fractional fuel to the first fractional fuel, the supply amount of the first fractional fuel is less than the supply amount of the second fractional fuel.

16. A fuel separation apparatus for cement clinker production, comprising: a prediction device that irradiates fuel containing waste with electromagnetic waves to obtain information on at least one selected from the group consisting of absorption, scattering, and transmission of the electromagnetic waves, and predicts the calorific value of the fuel using said information and a calorific value prediction model created in advance by machine learning or statistical methods; and a separation unit that separates the fuel into a plurality of fractional fuels, including a first fractional fuel and a second fractional fuel having a lower calorific value than the first fractional fuel, based on the calorific value prediction result, Multiple tanks for storing the multiple separated fuels separated by the separation device, Temporary furnace and Equipped with a cement kiln, The plurality of fractional fuels stored in each of the plurality of tanks are configured to be used as fuel in at least one of the cement kiln and the calcination furnace. The prediction device predicts the chlorine content of at least one of the separated fractional fuels based on the information, Based on the predicted calorific value of each of the plurality of separated fuels separated by the separation device, the supply destination for each of the plurality of separated fuels is selected and the supply amount is adjusted. A cement clinker manufacturing facility configured such that, if the predicted chlorine content of the first fractional fuel stored in the tank for storing the first fractional fuel among the plurality of tanks is below a threshold, the first fractional fuel is supplied to the cement kiln, and if the predicted result exceeds the threshold, the first fractional fuel is supplied to the calcination furnace.

17. The cement clinker manufacturing apparatus according to claim 15, wherein the first fractional fuel is supplied to the cement kiln from at least one of the plurality of tanks, which is different from the tank that supplies the second fractional fuel.

18. The cement clinker manufacturing apparatus according to claim 16, wherein the second fractional fuel is supplied to the calcination furnace from at least one of the plurality of tanks, which is different from the tank that supplies the first fractional fuel.

19. The system comprises a crushing unit that crushes the waste to obtain the fuel, and a conveying unit that conveys the fuel crushed in the crushing unit, The cement clinker manufacturing apparatus according to any one of claims 15 to 18, wherein the prediction device irradiates the fuel with electromagnetic waves while transporting it in the transport section.

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