Temperature measurement system, standardized temperature calculation device, and temperature measurement method

Abstract

To provide a temperature measurement system capable of acquiring a standardized temperature of a combustion chamber used for temperature control of a coke oven.SOLUTION: A temperature measurement system comprises: a two-color radiation thermometer that measures a temperature of a flue constituting a combustion chamber based on a ratio of spectral radiances at two different wavelengths acquired through an optical window provided in an observation hole above the combustion chamber of a coke oven; and a standardized temperature calculation device that calculates a standardized temperature of the combustion chamber. The standardized temperature calculation device includes: a measurement target identification unit that identifies the combustion chamber including the flue to be measured based on a measurement position by the two-color radiation thermometer; and a standardized temperature calculation unit that calculates the standardized temperature from a combustion switching time of the flue to be measured, a temperature of the flue measured by the two-color radiation thermometer, and a measurement time, using a temperature change formula representing a temperature of the flue that changes with time during combustion switching for switching over between a combustion-side flue and an exhaust-side flue of the combustion chamber, the temperature change formula being acquired in advance.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present invention relates to a temperature measurement system for measuring the temperature of a combustion chamber of a coke oven, a normalized temperature calculation device, and a temperature measurement method. [Background technology]

[0002] Coke ovens operate by adjusting the fuel gas supply rate based on the temperature of the combustion chamber. The temperature of the combustion chamber is typically measured using a radiation thermometer through an observation hole called a "flue port" located above the combustion chamber. To measure the temperature of the combustion chamber using a radiation thermometer, an operator removes the flue port cover (hereinafter also referred to as the "flue port cover") that covers the observation hole, looks into the combustion chamber with a handheld radiation thermometer, measures the temperature, and then replaces the flue port cover once the temperature reading is obtained. This measurement requires the operator to directly view the combustion chamber, which is open to the atmosphere, with the radiation thermometer, exposing them to flames and high-temperature hot air from the combustion chamber. Furthermore, since a single coke oven contains approximately 100 combustion chambers, each with approximately 30 flue ports, simply measuring the temperature at the few specific flue ports for each combustion chamber requires a significant amount of work.

[0003] As a method for measuring the temperature of a combustion chamber, for example, Patent Document 1 proposes a method in which an optical window is provided in the flue lid and the temperature of the combustion chamber is measured through the optical window using a two-color radiation thermometer. The method described in Patent Document 1 allows temperature measurement without removing the flue lid. Furthermore, the two-color radiation thermometer detects spectral radiance at two different wavelengths and uses the measurement principle of the ratio of these spectral radiances (two-color ratio) as a function of temperature. This allows for accurate temperature measurement without being affected by dust adhering to the optical window, which reduces the observed radiance, or by a "field of view defect" where part of the field of view of the two-color radiation thermometer falls outside the optical window. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Publication No. 2022-144765 Summary of the Invention [Problem to be solved by the invention]

[0005] A coke oven combustion chamber is composed of two or more flues, and employs a heating system that switches between the flue that supplies combustion gas (hereinafter also referred to as the "combustion-side flue") and the flue that discharges exhaust gas (hereinafter also referred to as the "exhaust-side flue") at predetermined intervals. As a result of this combustion switching, the temperature of the flue that has become the combustion side increases over time, while the temperature of the flue that has become the exhaust side decreases over time. Therefore, even if the average temperature of the combustion chamber over time is maintained constant, the temperature measured will differ depending on the timing of the combustion chamber temperature measurement.

[0006] In coke oven operation, a temperature to be maintained throughout the oven (design operating temperature) is set, and the temperature of the coke oven is controlled by adjusting the amount of combustion gas supplied so that the temperature of the combustion chamber is at the design operating temperature. However, as mentioned above, the measured combustion chamber temperature varies depending on the timing of measurement due to combustion switching, so it is not appropriate to directly use the measured combustion chamber temperature for coke oven temperature control. In order to properly control the temperature of the coke oven, it is desirable to obtain the combustion chamber temperature that can be compared with the design operating temperature.

[0007] Therefore, the present invention has been made in consideration of the above problems, and an object of the present invention is to provide a temperature measurement system, a normalized temperature calculation device, and a temperature measurement method that are capable of obtaining the normalized temperature of a combustion chamber used for temperature management of a coke oven. [Means for solving the problem]

[0008] In order to solve the above problems, according to one aspect of the present invention, there is provided a temperature measurement system comprising: a two-color radiation thermometer that measures the temperature of a flue that constitutes a combustion chamber based on the ratio of spectral radiances of two different wavelengths obtained through an optical window provided in an observation hole above the combustion chamber of a coke oven; and a normalized temperature calculation device that calculates the normalized temperature of the combustion chamber, wherein the normalized temperature calculation device has: a temperature measurement target identification unit that identifies the combustion chamber that includes the flue that is the object of temperature measurement based on the temperature measurement position by the two-color radiation thermometer; and a normalized temperature calculation unit that calculates the normalized temperature from the combustion switchover time of the flue that is the object of temperature measurement, the temperature of the flue measured by the two-color radiation thermometer, and the temperature measurement time, using a temperature change equation that has been obtained in advance and that represents the temperature of the flue that changes over time during combustion switchover between the flue on the combustion side of the combustion chamber and the flue on the exhaust side.

[0009] The two-color radiation thermometer is installed on a mobile device that moves above the coke oven, and the mobile device is equipped with a mobile information output device that outputs the position of the mobile device and the time at that position as movement information to the normalized temperature calculation device, and the normalized temperature calculation device may use the position and time of the mobile device when the two-color radiation thermometer measures the temperature as the temperature measurement position and temperature measurement time, identify the combustion chamber that has the flue that is the temperature measurement target by a temperature measurement target identification unit, and calculate the normalized temperature by the normalized temperature calculation unit.

[0010] The temperature change formula comprises an equation that represents the combustion phase in which the temperature of the flue rises over time, and an equation that represents the combustion phase in which the temperature of the flue falls over time, and the normalized temperature calculation unit may calculate the normalized temperature using one of the temperature change formulas that represents the combustion phase identified from the combustion switching time of the flue whose temperature is to be measured and the time of temperature measurement by the two-color radiation thermometer.

[0011] The normalized temperature may be a temperature determined from a temperature change formula and determined after a predetermined standard time has elapsed since the start of combustion switching.

[0012] Furthermore, in order to solve the above-mentioned problems, according to another aspect of the present invention, there is provided a normalized temperature calculation device comprising: a temperature measurement target identification unit that identifies a combustion chamber having a flue that is the object of temperature measurement, based on the temperature measurement position of a two-color radiation thermometer that measures the temperature of the flue that constitutes the combustion chamber of a coke oven; and a normalized temperature calculation unit that calculates the normalized temperature of the combustion chamber from the combustion switchover time of the flue that is the object of temperature measurement, the temperature of the flue measured by the two-color radiation thermometer, and the temperature measurement time, using a temperature change equation that represents the temperature of the flue that changes over time during combustion switchover between the flue on the combustion side of the combustion chamber and the flue on the exhaust side, which has been obtained in advance.

[0013] Furthermore, in order to solve the above-mentioned problems, according to another aspect of the present invention, there is provided a temperature measurement method including: a temperature change equation calculation step of calculating, for any combustion chamber of a coke oven, a temperature change equation that represents the temperature of the flue that changes over time during combustion switching, which switches between the combustion-side flue and the exhaust-side flue, from time-series data of the temperature of the flue that constitutes the combustion chamber that has been measured in advance; a temperature measurement step of using a two-color radiation thermometer to measure the temperature of the flue that is the object of temperature measurement, based on the ratio of spectral radiances of two different wavelengths obtained through an optical window provided in an observation hole above the combustion chamber of the coke oven; a temperature measurement object identification step of identifying a combustion chamber that includes the flue that is the object of temperature measurement, based on the temperature measurement position of the two-color radiation thermometer; and a normalized temperature calculation step of using the temperature change equation to calculate the normalized temperature of the combustion chamber from the combustion switching time of the flue that is the object of temperature measurement, the temperature of the flue measured by the two-color radiation thermometer, and the temperature measurement time. [Effects of the Invention]

[0014] As described above, according to the present invention, it is possible to acquire the normalized temperature of the combustion chamber used for temperature management of the coke oven. [Brief explanation of the drawings]

[0015] [Figure 1] 1 is a schematic diagram showing a schematic configuration of a coke oven according to an embodiment of the present invention. [Figure 2]FIG. 2 is an explanatory diagram illustrating combustion switching in a combustion chamber of a coke oven. [Figure 3] FIG. 2 is an explanatory diagram showing a configuration example of a temperature measurement system according to the embodiment; [Figure 4] 10 is an explanatory diagram showing a state in which the temperature of a combustion chamber is measured by a two-color radiation thermometer installed in the moving device according to the embodiment. FIG. [Figure 5] 1 is a graph showing an example of the relationship between blackbody temperature and dichroic ratio. [Figure 6] 4 is a graph showing an example of a change in temperature of a combustion chamber. DETAILED DESCRIPTION OF THE INVENTION

[0016] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In this specification and drawings, components having substantially the same functional configurations are designated by the same reference numerals, and redundant explanations will be omitted.

[0017] [1. Structure of a coke oven] First, a schematic configuration of a coke oven 1 according to one embodiment of the present invention will be described with reference to Figures 1 and 2. Figure 1 is a schematic diagram showing the schematic configuration of a coke oven 1 according to this embodiment. Figure 2 is an explanatory diagram explaining combustion switching in a combustion chamber 20 of the coke oven 1.

[0018] As shown in Fig. 1, a coke oven 1 is a furnace for producing coke. At the top of the furnace body of the coke oven 1, carbonization chambers 10 and combustion chambers 20 are arranged alternately in the furnace bed direction (the furnace width direction, the direction in which the carbonization chambers 10 and combustion chambers 20 are aligned, the Y direction), and a heat regenerator 60 is provided at the bottom. Coke is produced by burning combustion gas preheated in the heat regenerator 60 and combustion air in the combustion chamber 20, and carbonizing coal charged in the carbonization chamber 10 using the generated heat.

[0019] Each combustion chamber 20 is composed of multiple flues 21. FIG. 2 shows an example in which one combustion chamber 20 is equipped with two flues 21a and 21b. The coke oven 1 is operated by switching, at predetermined intervals, between a flue (combustion-side flue) that supplies combustion gas from the regenerator 60 and a flue (exhaust-side flue) that discharges exhaust gas to the regenerator 60, thereby controlling the heating so that the temperature of the combustion chamber 20 remains approximately constant. This combustion phase switching is performed to recover the heat of the high-temperature exhaust gas in the regenerator and use the heat of the regenerator to preheat the combustion gas after switching. For example, as shown in FIG. 2, the combustion of the combustion chamber 20 is switched by alternately repeating a period in which the flue 21a is the combustion-side flue and the flue 21b is the exhaust-side flue (combustion phase A) and a period in which the flue 21b is the combustion-side flue and the flue 21a is the exhaust-side flue (combustion phase B).

[0020] Coke produced by carbonizing coal (coke 5 in FIG. 4, which will be described later) is pushed by an extruder (not shown) from the extruder side to the coke discharge side on the opposite side, and is discharged from the carbonization chamber 10.

[0021] In the furnace top section 30 on the top surface of each combustion chamber 20, combustion chamber observation holes (also called flue ports; hereinafter referred to as "observation holes") 35 are opened vertically to check the temperature of each of the flues 21 (flues 21a and 21b in Figure 2) that make up the combustion chamber 20, connecting the flues 21 to the atmospheric space above the coke oven 1. Since the observation holes 35 are provided in all of the flues 21 that make up the combustion chamber 20, multiple observation holes 35 are arranged along the furnace length direction (the direction perpendicular to the furnace battery direction, the X direction). Each observation hole 35 is provided with a removable flue cover that closes the observation hole 35 to prevent the flames and hot air from the combustion chamber 20 from leaking through the opening of the observation hole 35.

[0022] The flue lid according to this embodiment has an optical window that transmits light from inside the flue 21 to the outside of the coke oven 1. Providing the optical window in the flue lid makes it possible to measure the temperature of the flue 21 without removing the flue lid. For the optical window, for example, quartz glass is used to prevent damage to the flue 21 due to heat. For the optical window, a circular plate glass or rod-shaped glass with a sufficient thickness and strength is suitable.

[0023] [2. Temperature measurement system] Next, a temperature measurement system 100 according to this embodiment will be described with reference to Fig. 3. Fig. 3 is an explanatory diagram showing an example of the configuration of the temperature measurement system 100 according to this embodiment. The temperature measurement system 100 according to this embodiment is a system that measures the temperature of the flue 21 that constitutes the combustion chamber 20 of the coke oven 1 and calculates the normalized temperature of the combustion chamber 20.

[0024] In the operation of the coke oven 1, the temperature of the combustion chamber 20 is controlled. As described above, the combustion chamber 20 is an assembly of flues 21. Therefore, in daily operation, the temperature of one of the multiple flues 21 is measured as a representative, and the measured temperature of that flue is regarded as the temperature of the combustion chamber 20.

[0025] As described above, the coke oven 1 employs a heating method in which the flue 21 on the combustion side and the flue on the exhaust side are switched at predetermined intervals. As a result of this combustion switching, the temperature of the flue 21 on the combustion side increases over time, and the temperature of the flue 21 on the exhaust side decreases over time. For this reason, the measured temperature differs depending on the timing of temperature measurement of the flue 21.

[0026] Therefore, in the temperature measurement system 100 according to this embodiment, it is determined whether the flue 21 constituting the combustion chamber 20, whose temperature is measured through the flue lid, is in a combustion phase where the temperature is rising or falling, and the normalized temperature of the combustion chamber 20 is calculated from the temperature of the flue 21 actually measured according to the determined combustion phase. In this way, by obtaining the normalized temperature of the combustion chamber 20 that can be compared with the operational design temperature, it becomes possible to appropriately manage the temperature of the coke oven 1.

[0027] In actual operation, the temperature is usually measured at several flues 21 for one combustion chamber 20 which is made up of around 30 flues 21, but for simplicity's sake, the following will explain the case where the normalized temperature of the combustion chamber 20 is obtained using one flue 21 as the temperature measurement target.

[0028] 3, the temperature measurement system 100 according to this embodiment includes a two-color radiation thermometer 110 and a normalized temperature calculation device 120. The temperature measurement system 100 may also include a movement information output device 130. Information is transmitted and received between the two-color radiation thermometer 110, the normalized temperature calculation device 120, and the movement information output device 130 via a network, and may be transmitted and received via a ground station, for example.

[0029] [2-1.2 color radiation thermometer] The two-color radiation thermometer 110 is a temperature measurement device that detects the spectral radiance of thermal radiation at two wavelengths and measures the change in the ratio of these spectral radiances (two-color ratio) according to temperature. The two-color radiation thermometer 110 according to this embodiment is provided on a moving device 70 that moves above the coke oven 1, as shown in FIG. 4 . The moving device 70 may be, for example, a coal loading cart that supplies coal from the top of the coke oven 1 to the coke chamber, or a moving cart used to move the two-color radiation thermometer 110. By providing the two-color radiation thermometer 110 on the moving device 70, it is possible to automatically measure the temperature of the flue 21, which is the temperature measurement target, thereby reducing the burden on the worker who measures the temperature of the flue 21.

[0030] Radiation thermometry is a method of measuring the temperature of an object without contact, utilizing the phenomenon that the thermal radiance increases as the temperature of the object rises, and is widely used in the scientific and industrial fields. A typical radiation thermometer that detects the thermal radiance (intensity of radiated light) at a certain wavelength of light is strictly called a "monochromatic radiation thermometer."

[0031] In contrast, two-color radiation thermometry is a method for measuring the temperature of an object without contacting it, utilizing the fact that the wavelength distribution of thermal radiation changes as the temperature of the object increases. A two-color radiation thermometer 110 that measures temperature based on two-color radiation thermometry determines the temperature T of the object from the ratio of the spectral radiances L1 and L2 of the two wavelengths λ1 and λ2. The spectral radiances L1 and L2 of the two observed wavelengths λ1 and λ2 are expressed by the Wien approximation formula for blackbody radiation, as shown in the following equations (1) and (2):

[0032]

number

[0033] Here, τ1 is the spectral transmittance along the optical path from the measurement object to the two-color radiation thermometer 110 at wavelength λ1 and temperature T, τ2 is the spectral transmittance along the optical path from the measurement object to the two-color radiation thermometer 110 at wavelength λ2 and temperature T, and c1 and c2 are the first and second constants of blackbody radiation, respectively. Note that in general radiation thermometry, the emissivity of the measurement object is an issue, but in measuring the temperature of the flue 21 that makes up the combustion chamber 20 of the coke oven 1, the flue 21 is a cavity with a uniform temperature and can therefore be considered a pseudo-blackbody (emissivity = 1) regardless of wavelength. Furthermore, the wavelengths λ1 and λ2 take on fixed values ​​for each two-color radiation thermometer.

[0034] If the spectral transmittances at the two wavelengths λ1 and λ2 are equal (i.e., τ1 = τ2 = τ), the dichroic ratio R, which is the ratio between the above equations (1) and (2), is expressed as the following equation (3).

[0035]

number

[0036] In the above formula (3), R λ Since Λ and Λ are constants determined by the detection wavelength, the dichroic ratio R is a function of only the temperature T. Therefore, if the dichroic ratio R can be obtained, the temperature T of the object to be measured can be determined.

[0037] 5 shows the relationship between the temperature T and the dichroic ratio R calculated using the above formula (3) with λ1 = 1350 nm and λ2 = 1550 nm. As shown in FIG. 5, the dichroic ratio R increases monotonically with temperature T.

[0038] In this way, with the two-color radiation thermometer 110, there is no need to measure the intensity of thermal radiance; the temperature T of the object can be determined simply by obtaining the two-color ratio R. With a monochromatic radiation thermometer, the temperature of the object is determined based on the detected thermal radiance, so the measured temperature decreases when the observation light weakens. In contrast, the two-color radiation thermometer 110 can measure temperature without being affected by light attenuation, because the two-color ratio R does not change even when the observation light weakens.

[0039] When the two-color radiation thermometer 110 identifies the temperature T of the object to be measured from the ratio of the spectral radiances L1 and L2 of the two wavelengths λ1 and λ2, it transmits the temperature T to the normalized temperature calculation device 120 as a measurement result of the temperature of the flue 21 of the combustion chamber 20 (specifically, the temperature of the furnace bottom 25). The two-color radiation thermometer 110 may also output the temperature T to an external terminal 7. The terminal 7 may be, for example, a monitoring terminal used by an operator operating the coke oven 1 to monitor the combustion state of the combustion chamber 20.

[0040] [2-2. Normalized temperature calculation device] The normalized temperature calculation device 120 calculates the normalized temperature of the combustion chamber 20. As shown in FIG. 3 , the normalized temperature calculation device 120 includes an input unit 121, a temperature change equation calculation unit 122, a temperature measurement target identification unit 123, a normalized temperature calculation unit 124, an output unit 125, and a storage unit 126.

[0041] (Input section) The input unit 121 is an interface that receives information from an external device. For example, the temperature of the flue 21 measured by the two-color radiation thermometer 110, location information of the moving device 70, and the time at that location are input to the input unit 121. The location information of the moving device 70 and the time at that location are input as movement information from, for example, a movement information output device 130 mounted on the moving device 70. The input unit 121 also receives the time at which combustion switching was performed in each combustion chamber 20 of the coke oven 1 (hereinafter also referred to as "combustion switching time") from the coke oven control device 3 that controls the operation of the coke oven 1. The input unit 121 outputs the input information to the temperature change equation calculation unit 122 and the temperature measurement target identification unit 123.

[0042] (Temperature change calculation section) The temperature change equation calculation unit 122 calculates a temperature change equation that expresses the temperature of the flue 21 in the combustion chamber 20 that changes over time during combustion switching. The temperature change equation is used to calculate the normalized temperature of the combustion chamber 20 when the temperature of the flue 21 is measured by the two-color radiation thermometer 110. For this reason, the temperature change equation calculation unit 122 calculates a temperature change equation that expresses the relationship between the temperature of the flue 21 and time from one combustion switching to the next combustion switching, using time-series data of the temperature of the flue 21 previously measured by the two-color radiation thermometer 110.

[0043] Since the temperature change of each combustion chamber 20 in the coke oven 1 can be considered to be the same, the temperature change equation can be found from time-series data of the temperature measured in one flue 21 of any one combustion chamber 20 for one coke oven 1. Of course, the temperature change equation may be found for each combustion chamber 20 of the coke oven 1.

[0044] The temperature of one flue 21, when focused on, rises over time when it is switched to the combustion side due to combustion switching, and falls over time when it is switched to the exhaust side. Furthermore, the relationship between the time elapsed after combustion switching and the temperature fluctuations can be considered constant when the coke oven 1 is in a steady operating state.

[0045] FIG. 6 shows an example of temperature changes in the flue 21. In the example of FIG. 6, the temperature of the flue 21 measured by the two-color radiation thermometer 110 rises over time from 0 to 30 minutes, and then falls over time from 30 to 60 minutes. If the combustion phase in which the temperature of the flue 21 rises over time is called the temperature rise phase, and the combustion phase in which the temperature of the flue 21 falls over time is called the temperature fall phase, the flue 21 repeats the temperature rise phase and temperature fall phase every predetermined time (30 minutes in the example of FIG. 6). The temperature rise phase and temperature fall phase shown in FIG. 6 correspond to combustion phase A and combustion phase B, respectively, when the flue 21a in FIG. 2 is the object of temperature measurement.

[0046] Therefore, the temperature change equation calculation unit 122 calculates, as temperature change equations, an equation that represents the temperature change in the temperature rise phase and an equation that represents the temperature change in the temperature fall phase. For this reason, the time-series data of the temperature of the flue 21 used to calculate the temperature change equation includes data for at least one temperature rise phase and one temperature fall phase. For example, the temperature change equation calculation unit 122 may determine an approximation equation that represents the relationship between the temperature of the flue 21 and time for each of the temperature rise phase and the temperature fall phase, and use this as the temperature change equation. The approximation equation may be, for example, a linear approximation equation or a polynomial approximation equation.

[0047] The temperature change equation calculation unit 122 records the calculated equation representing the temperature change in the temperature rise phase and the equation representing the temperature change in the temperature fall phase as temperature change equations in the storage unit 126. Typically, the temperature rise phase and the temperature fall phase exhibit symmetrical temperature changes with different positive and negative slopes.

[0048] (Temperature measurement target identification part) The temperature measurement target identification unit 123 identifies the combustion chamber 20 that includes the flue 21 whose temperature is to be measured, based on the temperature measurement position of the two-color radiation thermometer 110 that measures the temperature of the flue 21. For example, as shown in FIG. 4 , when the two-color radiation thermometer 110 is mounted on a mobile device 70, the temperature measurement position by the two-color radiation thermometer 110 can be considered to be the position of the mobile device 70 on the furnace. Therefore, the temperature measurement target identification unit 123 uses the position information of the mobile device 70 input to the normalized temperature calculation device 120 from the movement information output device 130 mounted on the mobile device 70 as the temperature measurement position of the two-color radiation thermometer 110, and identifies the combustion chamber 20 that includes the flue 21 whose temperature was measured by the two-color radiation thermometer 110. The temperature measurement target identification unit 123 notifies the normalized temperature calculation unit 124 of the identified combustion chamber 20.

[0049] (Normalized temperature calculation section) The normalized temperature calculation unit 124 calculates the normalized temperature of the combustion chamber 20 including the flue 21 that is the temperature measurement target identified by the temperature measurement target identification unit 123. The normalized temperature is a temperature that is corrected for the temperature fluctuations that occur regularly due to the combustion switching described above. For example, the normalized temperature is used for temperature management of the coke oven 1 and is compared with the operational design temperature. In this embodiment, the normalized temperature is the temperature after a predetermined standard time α has elapsed since the start of combustion switching, as identified from the temperature change equation. The standard time α may be determined appropriately and may be, for example, the center time of the temperature rise phase or the temperature fall phase.

[0050] 6, since the temperature rise phase and the temperature fall phase are each 30 minutes long, the central time of 15 minutes may be set as the standard time α. In this case, the temperature 15 minutes after the start of the temperature rise phase (0 minutes) specified by the temperature change equation representing the temperature change of the combustion chamber 20 in the temperature rise phase, or the temperature 15 minutes after the start of the temperature fall phase (30 minutes) specified by the temperature change equation representing the temperature change of the combustion chamber 20 in the temperature fall phase, becomes the normalized temperature of the combustion chamber 20.

[0051] To calculate the normalized temperature, the normalized temperature calculation unit 124 first identifies whether the flue 21 whose temperature is to be measured in the combustion chamber 20 is in the temperature rising phase or the temperature falling phase, based on the combustion switching time of the combustion chamber 20 whose temperature is to be measured, which is input from the coke oven control device 3. Next, the normalized temperature calculation unit 124 acquires a temperature change equation corresponding to the identified combustion phase from the storage unit 126. If the flue 21 whose temperature is to be measured is in the temperature rising phase, the normalized temperature calculation unit 124 acquires an equation representing the temperature change in the temperature rising phase from the storage unit 126. On the other hand, if the flue 21 whose temperature is to be measured is in the temperature falling phase, the normalized temperature calculation unit 124 acquires an equation representing the temperature change in the temperature falling phase from the storage unit 126.

[0052] The normalized temperature calculation unit 124 then calculates the normalized temperature of the combustion chamber 20 from the temperature of the flue 21 measured by the two-color radiation thermometer 110, the time of temperature measurement, and the combustion switching time, using a temperature change equation corresponding to the combustion phase of the flue 21. It is possible to confirm that combustion switching of the flue 21 has been carried out from the combustion switching time and the temperature measurement time.

[0053] For example, when the flue 21 whose temperature is to be measured is in the temperature rise phase, the normalized temperature calculation unit 124 calculates, from the time of temperature measurement by the two-color radiation thermometer 110 and the combustion switch time, how much time has passed since the start of the temperature rise phase when the two-color radiation thermometer 110 measured the temperature of the flue 21. Then, using a temperature change equation, the normalized temperature calculation unit 124 calculates the normalized temperature when standard time α has elapsed since the start of the temperature rise phase, from the temperature of the flue 21 measured by the two-color radiation thermometer 110 and the time elapsed since the start of the temperature rise phase when the temperature was measured. The normalized temperature calculation unit 124 outputs the calculated normalized temperature of the combustion chamber 20 to the output unit 125.

[0054] (output section) The output unit 125 outputs the normalized temperature of the combustion chamber 20 calculated by the normalized temperature calculation unit 124 to an external terminal 7, such as a monitoring terminal used by an operator to monitor the operational state of the coke oven 1. The operator can determine whether the furnace body temperature is appropriate by comparing the normalized temperature of the combustion chamber 20 output from the output unit 125 with the operational design temperature of the coke oven 1.

[0055] (Storage part) The storage unit 126 is a storage unit that stores information required for the normalized temperature calculation device 120 to calculate the normalized temperature of the combustion chamber 20, and is composed of, for example, a ROM, a RAM, etc. For example, the storage unit 126 stores the temperature change equation calculated by the temperature change equation calculation unit 122.

[0056] The temperature measurement system 100 according to this embodiment has been described above. Note that in the above description, the two-color radiation thermometer 110 has been described as being mounted on the mobile device 70, but the present invention is not limited to this example. For example, the temperature of the flue 21 may be measured manually by an operator using the two-color radiation thermometer 110. In this case, the operator may input the temperature measurement position using an input terminal (not shown). At this time, the two-color radiation thermometer 110 associates the measured temperature of the flue 21 with the time and transmits it to the input terminal. The input terminal may associate the received temperature of the flue 21 and the time with the temperature measurement position input by the operator and transmit it to the normalized temperature calculation device 120.

[0057] 3 includes a temperature change equation calculation unit 122, the present invention is not limited to this example. For example, the calculation of the temperature change equation may be performed by a device separate from the normalized temperature calculation device 120. Furthermore, the temperature measurement target identification unit 123 and the normalized temperature calculation unit 124 included in the normalized temperature calculation device 120 may also be included in different devices capable of transmitting and receiving information. A program for realizing each function of the above-described normalized temperature calculation device 120 can also be created and implemented in a computer or the like. Each function of the normalized temperature calculation device 120 is realized by the computer executing the implemented program using a CPU (Central Processing Unit) or the like of the computer.

[0058] [3. Temperature measurement method] An example of a temperature measurement method for acquiring the temperature and normalized temperature of the combustion chamber 20 of the coke oven 1 according to this embodiment will be described below.

[0059] (Temperature change formula calculation step) In the temperature measurement method according to this embodiment, first, as a preliminary step, for any combustion chamber 20 of the coke oven 1, a temperature change equation that represents the temperature of the flue gas 21 that changes over time during combustion switching is calculated from time-series data of the temperature of the flue gas 21 that constitutes the combustion chamber 20 that has been measured in advance. The temperature change equation may be calculated, for example, by the temperature change equation calculation unit 122 of the normalized temperature calculation device 120. The temperature change equation calculation unit 122 approximates the time-series data of temperature to calculate an equation that represents the temperature change in the temperature rise phase and an equation that represents the temperature change in the temperature fall phase as temperature change equations. The temperature change equation calculation unit 122 records the calculated temperature change equations in the storage unit 126.

[0060] (Temperature measurement step) After the preliminary work, the temperature of the flue 21 to be measured is measured using a two-color radiation thermometer 110. The temperature T of the flue 21 measured by the two-color radiation thermometer 110 can be obtained based on the ratio of the spectral radiances L1 and L2 at two different wavelengths λ1 and λ2 obtained by the two-color radiation thermometer 110 through an optical window 43 provided in an observation hole 35 above the flue 21 of the coke oven 1. For example, as shown in FIG. 4, when the two-color radiation thermometer 110 is installed on a mobile device 70, the mobile device 70 travels above the coke oven 1, and the two-color radiation thermometer 110 measures the temperature T of each flue 21 in turn.

[0061] The two-color radiation thermometer 110 outputs the acquired temperature T of the flue 21 to the normalized temperature calculation device 120. Furthermore, the movement information output device 130 provided in the movement device 70 automatically outputs the position information of the movement device 70 and the time at which it was received to the normalized temperature calculation device 120 at a predetermined cycle. The input unit 121 associates the position information of the movement device 70 and the time at which it was received, which were input at the same time, with the temperature T of the flue 21 measured by the two-color radiation thermometer 110.

[0062] (Temperature measurement target identification step) Next, the normalized temperature calculation device 120 uses the temperature measurement target identification unit 123 to identify the combustion chamber 20 that includes the flue 21 that is the temperature measurement target, based on the temperature measurement position of the two-color radiation thermometer 110 that measures the temperature of the flue 21. The temperature measurement target identification unit 123 uses the position information of the mobile device 70 input to the normalized temperature calculation device 120 from the movement information output device 130 mounted on the mobile device 70 as the temperature measurement position of the two-color radiation thermometer 110, and identifies the combustion chamber 20 that includes the flue 21 whose temperature was measured by the two-color radiation thermometer 110. The temperature measurement target identification unit 123 notifies the normalized temperature calculation unit 124 of the identified combustion chamber 20.

[0063] (Normalized temperature calculation step) The normalized temperature calculation unit 124 then calculates the normalized temperature of the combustion chamber 20 identified by the temperature measurement target identification unit 123. The normalized temperature calculation unit 124 first identifies whether the flue 21 whose temperature is to be measured is in the temperature rising phase or the temperature falling phase, based on the combustion switching time of the flue 21 whose temperature is to be measured input from the coke oven control device 3. Next, the normalized temperature calculation unit 124 acquires a temperature change equation corresponding to the identified combustion phase from the storage unit 126. If the flue 21 whose temperature is to be measured is in the temperature rising phase, the normalized temperature calculation unit 124 acquires an equation representing the temperature change in the temperature rising phase from the storage unit 126. On the other hand, if the flue 21 whose temperature is to be measured is in the temperature falling phase, the normalized temperature calculation unit 124 acquires an equation representing the temperature change in the temperature falling phase from the storage unit 126.

[0064] Then, the normalized temperature calculation unit 124 calculates the normalized temperature of the combustion chamber 20 from the temperature of the flue 21 measured by the two-color radiation thermometer 110, the time of temperature measurement, and the combustion switching time, using a temperature change equation corresponding to the combustion phase of the flue 21. The normalized temperature calculation unit 124 outputs the calculated normalized temperature of the combustion chamber 20 to the output unit 125.

[0065] The temperature measurement method according to this embodiment has been described above. According to the temperature measurement method according to this embodiment, it is determined whether the flue, whose temperature is measured via the flue lid, is in a combustion phase where the temperature is rising or falling, and the normalized temperature of the combustion chamber containing the flue is calculated from the actually measured temperature of the flue using a temperature change equation that represents the change in temperature of the flue over time in the determined combustion phase. In this way, by taking into account the temperature change due to combustion switching in the combustion chamber, and acquiring the normalized temperature of the combustion chamber that can be compared with the operational design temperature, it is possible to appropriately manage the temperature of the coke oven.

[0066] Although the preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings, the present invention is not limited to these examples. It is clear that a person skilled in the art to which the present invention pertains can conceive of various modifications and alterations within the scope of the technical ideas set forth in the claims, and it is understood that these also naturally fall within the technical scope of the present invention.

[0067] For example, in the above embodiment, the time series data of the temperature of the flue used to calculate the temperature change formula was measured by a two-color radiation thermometer, but the present invention is not limited to this example. For example, the time series data of the temperature of the flue used to calculate the temperature change formula may be measured by a monochromatic radiation thermometer. [Explanation of symbols]

[0068] 1. Coke oven 3 Coke oven control device 5. Coke 7 Terminals 10 Carbonization chamber 20 Combustion chamber 21 Furyu 25 Hearth Bottom 30 Furnace top 35 Observation hole (Fluport) 40 Flue Lid 43 Optical window 60 Heat storage chamber 70 Mobile Device 100 Temperature Measurement System 110 Two color radiation thermometer 120 Standardized temperature calculation device 121 Input section 122 Temperature change calculation section 123 Temperature measurement target identification part 124 Standardized temperature calculation section 125 Output section 126 Storage section 130 Movement information output device

Claims

1. a two-color radiation thermometer that measures the temperature of a flue constituting a combustion chamber of a coke oven based on the ratio of spectral radiances at two different wavelengths obtained through an optical window provided in an observation hole above the combustion chamber; and a normalized temperature calculation device for calculating a normalized temperature of the combustion chamber; Equipped with The normalized temperature calculation device is a temperature measurement target specifying unit that specifies a combustion chamber having a flue that is a temperature measurement target based on the temperature measurement position of the two-color radiation thermometer; a normalized temperature calculation unit that calculates the normalized temperature from the combustion switch time of the flue that is the temperature measurement target, the temperature of the flue measured by the two-color radiation thermometer, and the temperature measurement time, using a temperature change equation that represents the temperature of the flue in the combustion chamber that changes over time during combustion switch between the flue on the combustion side of the combustion chamber and the flue on the exhaust side of the combustion chamber, which has been acquired in advance; A temperature measurement system comprising:

2. the two-color radiation thermometer is installed on a moving device that moves over the coke oven, the mobile device includes a movement information output device that outputs a position of the mobile device and a time when the mobile device is at the position as movement information to the normalized temperature calculation device; The normalized temperature calculation device is The position and time of the moving device when the two-color radiation thermometer measures the temperature are defined as the temperature measurement position and the temperature measurement time, the temperature measurement target specifying unit specifies a combustion chamber having a flue as the temperature measurement target, The temperature measurement system according to claim 1 , wherein the normalized temperature calculation unit calculates the normalized temperature.

3. the temperature change equation comprises an equation representing a combustion phase in which the temperature of the flue increases over time, and an equation representing a combustion phase in which the temperature of the flue decreases over time, 3. The temperature measurement system according to claim 1, wherein the normalized temperature calculation unit calculates the normalized temperature using one of the temperature change equations that represents a combustion phase identified from the combustion switching time of the flue whose temperature is to be measured and the time of temperature measurement by the two-color radiation thermometer.

4. The temperature measurement system according to claim 1 or 2, wherein the normalized temperature is a temperature determined from the temperature change equation and obtained after a predetermined standard time has elapsed since the start of the combustion switching.

5. a temperature measurement target specifying unit that specifies a combustion chamber having a flue that is a temperature measurement target based on a temperature measurement position of a two-color radiation thermometer that measures the temperature of a flue that constitutes a combustion chamber of a coke oven; a normalized temperature calculation unit that calculates the normalized temperature of the combustion chamber from the combustion switch time of the flue that is the temperature measurement target, the temperature of the flue measured by the two-color radiation thermometer, and the temperature measurement time, using a temperature change equation that represents the temperature of the flue that changes over time during combustion switch between the combustion-side flue of the combustion chamber and the exhaust-side flue, which has been acquired in advance; A normalized temperature calculation device comprising:

6. a temperature change equation calculation step for calculating, for any combustion chamber of a coke oven, a temperature change equation that represents the temperature of the flue that changes over time during combustion switching between the combustion-side flue and the exhaust-side flue, from time-series data of the temperature of the flue that constitutes the combustion chamber that has been measured in advance; a temperature measurement step of measuring the temperature of the flue, the temperature of which is to be measured, based on the ratio of spectral radiances at two different wavelengths obtained using a two-color radiation thermometer through an optical window provided in an observation hole above the combustion chamber of the coke oven; a temperature measurement target identification step of identifying a combustion chamber having a flue that is a temperature measurement target based on the temperature measurement position of the two-color radiation thermometer; a normalized temperature calculation step of calculating a normalized temperature of the combustion chamber using the temperature change formula from the combustion switching time of the flue that is the temperature measurement target, the temperature of the flue measured by the two-color radiation thermometer, and the temperature measurement time; A temperature measurement method comprising:

Images