Carbonaceous solid fuel temperature monitoring device

Abstract

To grasp change in temperature of a carbon-based solid fuel regardless of storage environment and a state of existence of the carbon-based solid fuel.SOLUTION: CO concentration of a coal pile 1 is detected by a CO sensor 3. Change rate of the CO concentration and that of temperature (temperature rise rate) are made to correspond to each other by estimation means 5, and change in temperature of the coal pile 1 is grasped. Risk of ignition of the coal pile 1 that is piled up in an outdoor storage place is predicted in advance regardless of a kind of the coal.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a temperature monitoring device for carbon-based solid fuel that monitors the temperature of the carbon-based solid fuel. Place Regarding. [Background technology]

[0002] For example, coal is widely used as a carbon-based solid fuel in power plants and steel mills, and is stored in piles in coal storage areas (coal yards). Because coal is stored in the atmosphere, it reacts with oxygen in the air, causing oxidation. Oxidation causes the coal to generate heat, and the rise in coal temperature can lead to spontaneous combustion.

[0003] To prevent fires from breaking out in coal yards, the temperature of coal (coal piles) in the coal yards is monitored. For example, a technique is known in which infrared rays are irradiated onto a coal pile to measure changes in surface temperature (see, for example, Patent Document 1). By measuring the surface temperature of the coal pile over time, it is possible to grasp temperature changes, and by taking measures such as sprinkling water when a rise in coal temperature is detected, it is possible to prevent spontaneous combustion of the coal.

[0004] However, the conventionally proposed technologies are technologies for measuring the surface temperature of the coal pile, and therefore are unable to grasp temperature changes inside the coal pile. There is also a technology for measuring the temperature inside the coal pile by inserting a long temperature detection means into the coal pile, but there is a limit to the length that can be inserted, and so it is essentially only possible to grasp changes in the surface temperature.

[0005] In addition, the location of the coal pile where heat is generated does not match the location where the temperature is actually measured. Furthermore, the environments in which coal is stored are different between indoor and outdoor coal storage yards, and in either case, only specific local temperature measurements can be made, so the temperature measurement results do not necessarily lead to an understanding of the heat-generating location. Therefore, the current situation is that there is a need for technology that can measure temperature over a wide area rather than just a local area, and even deep inside the coal pile. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] Japanese Patent Application Laid-Open No. 2000-159315 Summary of the Invention [Problem to be solved by the invention]

[0007] The present invention has been made in view of the above circumstances, and provides a temperature monitoring device for carbonaceous solid fuel that can grasp changes in the temperature of carbonaceous solid fuel regardless of the storage environment or state of the carbonaceous solid fuel. Place The purpose is to provide. [Means for solving the problem]

[0008] In order to achieve the above object, the temperature monitoring device for a carbon-based solid fuel of the present invention according to claim 1 comprises: The CO status of existing carbon-based solid fuels is the concentration of CO CO detection means for detecting CO; Rate of change of CO concentration a relationship storage means for storing the relationship between the temperature and the temperature; The relationship stored in the relationship storage means is CO concentration and an estimation means for judging the temperature status of the carbon-based solid fuel by matching the above. 、 The relationship storage means includes: A relationship between a rate of change in the CO concentration and a rate of change in the temperature of the carbon-based solid fuel is stored; The estimation means By correlating the rate of change of the CO concentration with the rate of change of the temperature of the carbon-based solid fuel, the change in the temperature of the carbon-based solid fuel is integrally estimated and understood. It is characterized by:

[0009] In the present invention according to claim 1, The temperature status (heating status, temperature value, etc.) is determined by correlating the CO concentration status with the temperature. By using the rate of change of CO concentration, it is possible to determine the temperature regardless of the type of carbonaceous solid fuel. Then, it is possible to determine the temperature change status (temperature change rate: heating rate) based on the rate of change of CO concentration.

[0010] Incidentally, Japanese Patent No. 5385853 discloses a technology for detecting ignition based on CO concentration. This technology is for checking the risk of ignition and adjusting the coal supply situation, and is not directly related to the technology for monitoring temperature. In other words, the technology in Japanese Patent No. 5385853 merely determines the presence or absence of an oxidation reaction based on the presence or absence of CO detection, and does not estimate temperature from CO concentration.

[0011] Furthermore, Japanese Patent No. 6070181 discloses a technology for evaluating spontaneous combustion potential based on the amount of CO generated. The technology disclosed in Japanese Patent No. 6070181 does not detect a specific temperature. Furthermore, CO is detected at 300°C or higher, which is a significantly different temperature range.

[0012] Meanwhile, conventionally, the heat generation status of carbon-based solid fuels is monitored by CO concentration. For example, at the site, CO concentration is measured at the top of the silo, and measures are taken depending on the detected CO concentration. However, the measured CO is the average CO concentration within the silo, and it does not lead to the identification of the heat-generating part. Furthermore, even if the CO concentration is detected, the specific temperature of the carbon-based solid fuel is unknown.

[0013] The temperature monitoring device for carbon-based solid fuel of the present invention according to claim 1 makes it possible to grasp changes in the temperature of the carbon-based solid fuel regardless of the storage environment or state of the carbon-based solid fuel.

[0016] Also, Claim 2 The temperature monitoring device for a carbon-based solid fuel of the present invention relates to The CO status of existing carbon-based solid fuels The amount of CO generated is CO detection means for detecting CO; CO emissions per unit time a relationship storage means for storing the relationship between the temperature and the temperature; The relationship stored in the relationship storage means is Amount of CO generated and an estimation means for judging the temperature status of the carbon-based solid fuel by matching the above. 、 The relationship storage means includes: a relationship between the amount of CO generated per unit time and the rate of change of the temperature of the carbon-based solid fuel is stored; The estimation means By correlating the amount of CO generated per unit time with the rate of change in the temperature of the carbon-based solid fuel, the change in the temperature of the carbon-based solid fuel is integrally estimated and understood. It is characterized by:

[0017] Claim 2 In the present invention, the amount of CO generated per unit time (CO generation rate) is correlated with the temperature to determine the temperature status (temperature rise status, temperature value, etc.). By using the amount of CO generated per unit time (CO generation rate), the temperature can be determined regardless of the type of carbon-based solid fuel. Then, it is possible to determine the state of change in temperature (rate of change in temperature: rate of temperature rise) relative to the amount of CO generated per unit time (CO generation rate).

[0020] Also, Claim 3 The temperature monitoring device for a carbon-based solid fuel of the present invention relates to Claim 1 or Claim 2 In the temperature monitoring device for carbon-based solid fuel described in the above, an actual temperature detection means for detecting the actual temperature of the carbon-based solid fuel is provided, and the estimation means uses the actual temperature detected by the actual temperature detection means as an initial value and makes a judgment based on the CO status detected by the CO detection means. Temperature changes The present invention is characterized in that it has a temperature estimation function that estimates the temperature of the carbon-based solid fuel by taking the initial value into account.

[0021] Claim 3 In the present invention, an initial value of the temperature is detected by the actual temperature detection means, and the initial value is taken into account in the temperature situation determined based on the CO situation detected by the CO detection means, so that the temperature of the carbon-based solid fuel can be estimated by the temperature estimation function.

[0022] The temperature monitoring method using the temperature monitoring device for carbon-based solid fuel of the present invention includes the steps of: The method is characterized by detecting the state of CO in an existing carbon-based solid fuel, determining the temperature from the CO state by correlation, and determining a change in the temperature of the carbon-based solid fuel based on the CO detection state.

[0023] This means: It becomes possible to grasp the change in the temperature of the carbon-based solid fuel regardless of the storage environment or state of the carbon-based solid fuel.

[0024] And the above-mentionedThe method for monitoring the temperature of a carbon-based solid fuel is characterized in that the CO concentration is detected as the CO status, the rate of change of the CO concentration or the amount of CO generated per unit time (CO generation rate) is derived, and the rate of change of the CO concentration or the amount of CO generated per unit time (CO generation rate) is correlated with the increase in temperature to determine the change in the temperature of the carbon-based solid fuel.

[0025] This means: By correlating the rate of change in CO concentration or the amount of CO generated per unit time (CO generation rate) with the temperature increase (rate of change), it is possible to determine the change in the temperature of the carbonaceous solid fuel. [Effects of the Invention]

[0026] The temperature monitoring device for carbon-based solid fuel of the present invention Place This makes it possible to grasp the change in the temperature of the carbon-based solid fuel regardless of the storage environment or state of the carbon-based solid fuel. [Brief explanation of the drawings]

[0027] [Figure 1] 1 is a schematic diagram illustrating the configuration of a temperature monitoring device for a carbon-based solid fuel according to a first embodiment of the present invention. [Figure 2] FIG. 2 is a block diagram of an estimation unit. [Figure 3] 1 is a graph showing the change over time in temperature and the rate of change of temperature (rate of temperature rise). [Figure 4] 1 is a graph showing changes over time in CO concentration and the rate of change in CO concentration. [Figure 5] 1 is a graph showing the relationship between the rate of change of temperature (rate of temperature rise) and the rate of change of CO concentration. [Figure 6] FIG. 10 is a schematic diagram showing the configuration of a temperature monitoring device for a carbon-based solid fuel according to a second embodiment of the present invention. [Figure 7] FIG. 2 is a block diagram of an estimation unit. [Figure 8] 1 is a graph showing changes in temperature over time. [Figure 9] 1 is a graph showing the change over time in the rate of temperature change (temperature rise rate) and the amount of CO generated per unit time (CO generation rate). [Figure 10] 1 is a graph showing the relationship between the rate of change of temperature (rate of temperature rise) and the amount of CO generated per unit time (CO generation rate). [Figure 11] FIG. 10 is a schematic diagram of a temperature monitoring device for a carbon-based solid fuel according to a third embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0028] A first embodiment of the present invention will be described with reference to FIGS.

[0029] FIG. 1 shows a schematic configuration for explaining the overall situation when a temperature monitoring device for carbon-based solid fuel according to a first embodiment of the present invention is applied to temperature monitoring of coal piles in a coal yard, FIG. 2 shows a block configuration of the estimation means, FIG. 3(a) shows a graph explaining the change in temperature over time, FIG. 3(b) shows a graph explaining the change in the rate of change of temperature (rate of temperature rise) over time, FIG. 4(a) shows a graph explaining the change in CO concentration over time, FIG. 4(b) shows a graph explaining the change in the rate of change of CO concentration over time, and FIG. 5 shows a graph showing the relationship between the rate of change of temperature (rate of temperature rise) and the rate of change of CO concentration.

[0030] The overall configuration of the temperature monitoring device for carbon-based solid fuel will be described with reference to FIG.

[0031] As shown in the figure, coal, a carbonaceous solid fuel used as fuel for power plants, etc., is piled up in a coal storage yard to form a coal pile 1 (actual coal). When stored, the coal heats up through oxidation. The time it takes for oxidation to heat up varies depending on the type of coal (e.g., lignite, sub-bituminous coal, bituminous coal, etc.) and the storage environment.

[0032] In order to predict the risk of spontaneous combustion of coal due to heat generation, it is necessary to monitor the temperature of the coal pile. For this reason, coal stockpiles are equipped with coal temperature monitoring devices. The coal temperature monitoring device will be explained below.

[0033] A gas suction pipe 2 is provided for an existing coal pile 1. CO sensors 3 (three in the illustrated example) are provided for the gas suction pipe 2, and gas is sucked in by a suction pump 4. The detection information of the CO sensors 3 is input to estimation means 5. A temperature sensor 6 is provided for the coal pile 1 as actual temperature detection means for detecting the actual temperature of the coal. The detection information of the temperature sensor 6 is input to estimation means 5.

[0034] The estimation means 5 has a relationship storage means for storing the relationship between the CO state (the rate of change of CO concentration) and the rate of change of temperature (rate of temperature rise). The estimation means 5 associates the rate of change of CO concentration with the relationship stored in the relationship storage means, and determines the rate of temperature rise (temperature state) of the coal pile 1 (coal).

[0035] The state of the estimation means 5 will be described with reference to FIG.

[0036] As shown in the figure, the estimation means 5 includes CO concentration change rate estimation means 11 that estimates the rate of change of the CO concentration based on the detection information of the CO sensor 3 and information on the volume of the coal, and heating rate derivation means 12 that stores the relationship between the rate of change of temperature (heating rate) and the rate of change of CO concentration for a plurality of coal types (the map shown in FIG. 5 ) (relationship storage means).

[0037] The heating rate derivation means 12 determines the heating rate of coal (dT / dt: °C / min) from the map shown in FIG. 5 according to the rate of change of the CO concentration (dCO concentration / dt: ppm / L-coal / min) estimated by the CO concentration change rate estimation means 11.

[0038] The relationship shown in FIG. 5 has been derived from the following findings by the present inventor.

[0039] Specifically, a 10 cm square wire mesh container filled with a coal sample was suspended in a thermostatic chamber and heated to a predetermined temperature (80°C, 100°C) in an air atmosphere. The temperature rise of the coal sample caused by heat generation was measured using a temperature detection means, and the time-dependent changes in temperature and the time-dependent changes in the temperature change rate (temperature rise rate) were determined. In addition, CO generated by heat generation was measured using a CO concentration detection means, and the time-dependent changes in CO concentration and the time-dependent changes in the time-dependent changes in the rate of change of CO concentration were determined.

[0040] As shown in Figure 3(a), the change in coal temperature over time at 80°C (shown by the dotted line in the figure) and the change in coal temperature over time at 100°C (shown by the solid line in the figure) can be determined. Also, as shown in Figure 3(b), the change in coal temperature rate (heating rate) over time at 80°C (shown by the dotted line in the figure) and the change in coal temperature rate (heating rate) over time at 100°C (shown by the solid line in the figure) can be determined.

[0041] Meanwhile, as shown in Figure 4(a), the change over time in the CO concentration of coal at 80°C (shown by the dotted line in the figure) and the change over time in the CO concentration of coal at 100°C (shown by the solid line in the figure) are determined. Also, as shown in Figure 4(b), the change over time in the rate of change in the CO concentration of coal at 80°C (shown by the dotted line in the figure) and the change over time in the rate of change in the CO concentration of coal at 100°C (shown by the solid line in the figure) are determined.

[0042] As shown in Figures 3(a)(b) and 4(a)(b), it can be seen that there is a correlation between the changes over time in coal temperature and the rate of change (heating rate) of coal temperature and the changes over time in coal CO concentration and the rate of change (heating rate) of coal CO concentration. From the results of Figures 3(a)(b) and 4(a)(b), the relationship shown in Figure 5 can be derived for coal X (circle), coal Y (triangle), and coal Z (square) shown in Figure 5. In other words, it is possible to derive the rate of change (heating rate) of temperature in response to the rate of change of CO concentration for coal X (circle), coal Y (triangle), and coal Z (square).

[0043] Returning to Fig. 2, the estimation means 5 has a temperature estimation function 13 that estimates the current temperature of the coal by taking into account the temperature change rate (rate of temperature rise) in relation to the initial temperature (T0) detected in the initial state (time t = 0). In other words, the temperature estimation function 13 uses the actual temperature as the initial value, and takes into account the temperature change rate based on the rate of change of the CO concentration derived from the map in Fig. 5, to calculate the estimated temperature (Ta) of the coal at time t = a. (An arbitrary reference time at which no temperature rise due to heat generation is observed is taken as t = 0. a is a positive constant.)

[0044] That is,

number

[0045] Therefore, by correlating the rate of change in CO concentration with the rate of change in temperature (rate of temperature rise), it becomes possible to grasp the temperature change of the coal pile 1 piled up in an outdoor coal yard, regardless of the coal type. Because the temperature change can be grasped, it is possible to predict in advance the risk of the coal pile 1 stored outdoors catching fire.

[0046] In the above-described embodiment, the change in temperature of the coal pile 1 is estimated from the rate of change in the CO concentration. However, if the flow rate of the gas passing through the coal pile 1 is known, it is possible to estimate the change in temperature of the coal pile 1 from the CO generation rate, and the temperature of the coal pile 1 can be estimated with higher accuracy.

[0047] In the above-described embodiment, by installing a large number of CO sensors 3, the distribution of CO concentration can be determined even in a wide area such as the coal pile 1, which can lead to the identification of heat-generating areas. Furthermore, it is also effective to use thermocouples in the heat-generating areas identified from the distribution of CO concentration. That is, the estimation means 5 can more accurately grasp the temperature by comparing the actual temperature detected by the thermocouple with the estimated temperature at the time the estimated temperature (Ta) is calculated.

[0048] A second embodiment of the present invention will be described with reference to FIGS.

[0049] FIG. 6 shows a schematic configuration for explaining the overall situation when a carbon-based solid fuel temperature monitoring device according to a second embodiment of the present invention is applied to monitoring the temperature of coal in a silo, FIG. 7 shows a block configuration of the estimation means, FIG. 8 shows a graph explaining changes in temperature over time, FIG. 9 shows graphs explaining changes in the temperature change rate (heating rate) and the amount of CO generated per unit time (CO generation rate) over time, and FIG. 10 shows a graph showing the relationship between the temperature change rate (heating rate) and the amount of CO generated per unit time (CO generation rate) for a number of coal types.

[0050] The overall configuration of the temperature monitoring device for carbon-based solid fuel will be described with reference to FIG.

[0051] As shown in the figure, coal, which is a carbonaceous solid fuel used as fuel for a power plant or the like, is stored inside a silo 21 (actual coal). In order to detect in advance the risk of spontaneous combustion due to heat generation, a coal temperature monitoring device is provided to monitor the temperature of the coal inside the silo 21.

[0052] A tube 22 for gas suction is suspended from the ceiling of the silo 21, and CO sensors 23 (four in the illustrated example) are attached to the tube 22, and gas is sucked in by a suction pump 24. The detection information of the CO sensors 23 is input to estimation means 25. A temperature sensor 26 is attached to the silo 21 as actual temperature detection means for detecting the actual temperature of the coal in the silo 21. The detection information of the temperature sensor 26 is input to estimation means 25.

[0053] The estimation means 25 obtains the CO concentration and the gas flow rate, and calculates the amount of CO generated per unit time (CO generation rate). Information on the volume of coal in the silo 21 is also input to the estimation means 25.

[0054] The estimation means 25 has a relationship storage means for storing the relationship between the CO status (amount of CO generated per unit time: CO generation rate) and the rate of change of temperature (rate of temperature rise). The estimation means 25 associates the CO generation rate with the relationship stored in the relationship storage means, and determines the rate of temperature rise of the coal in the silo 21 (temperature status).

[0055] The state of the estimation means 25 will be described with reference to FIG.

[0056] As shown in the figure, the estimation means 25 has CO generation rate estimation means 31 that estimates the amount of CO generated per unit time (CO generation rate) based on the detection information from the CO sensor 23, gas flow rate information, and coal volume information, and heating rate derivation means 32 that stores the relationship (map shown in FIG. 10) between the rate of change of temperature (heating rate) and the amount of CO generated per unit time (CO generation rate) for a plurality of coal types (relationship storage means).

[0057] The heating rate derivation means 32 determines the heating rate of coal (dT / dt: °C / min) from the map shown in FIG. 10 according to the amount of CO generated per unit time (CO generation rate) (CO generation rate: mol / L-coal / min) estimated by the CO generation rate estimation means 31.

[0058] The relationship shown in FIG. 10 has been derived from the following findings by the present inventor.

[0059] Specifically, approximately 180 g of a coal sample was placed in an insulated container and kept at 40°C in a nitrogen atmosphere. After the temperature stabilized, the nitrogen was switched to air, and the temperature rise of the coal sample due to heat generation was measured using a temperature detection device. The temperature at which the container was heated was controlled to follow the internal temperature of the coal. In addition, the CO generated by heat generation was measured using a CO concentration detection device.

[0060] The change in coal temperature over time was determined as shown in Figure 8. Then, as shown in Figure 9, it was confirmed that the coal temperature rise rate (the temperature rise rate when air is blown in to raise the temperature at a predetermined temperature: dT / dt: °C / min) increased at the beginning of the reaction, decreased once, and then increased again, as shown by the solid line.

[0061] The amount of CO generated per unit time (CO generation rate: mol / L-coal / min) increases initially, then decreases, and then increases again. This indicates that there is a correlation between the rate of coal temperature rise and the amount of CO generated per unit time (CO generation rate).

[0062] From the results in Figures 8 and 9, the relationships shown in Figure 10 can be derived for coal X (circle), coal Y (triangle), and coal Z (square). That is, the rate of change of temperature (rate of temperature rise) can be derived in correspondence with the amount of CO generated per unit time (CO generation rate) for coal X (circle), coal Y (triangle), and coal Z (square).

[0063] Returning to Figure 7, the estimation means 25 has a temperature estimation function 33 that estimates the current temperature of the coal by taking into account the temperature change rate (heating rate) based on the initial temperature (T0) detected in the initial state (time t = 0). In other words, the temperature estimation function 33 uses the actual temperature as the initial value, and adds the initial value to the temperature change based on the amount of CO generated per unit time (CO generation rate) derived based on the map in Figure 10, to calculate the estimated temperature (Ta) of the coal at time t = a. (An arbitrary reference time at which no temperature increase due to heat generation is observed is set to t = 0. a is a positive constant.)

[0064] That is,

number

[0065] Therefore, by calculating the amount of CO generated per unit time (CO generation rate) based on the gas volume and correlating the amount of CO generated per unit time (CO generation rate) with the rate of change in temperature (rate of temperature rise), it becomes possible to grasp changes in the temperature of coal stored in silo 21, regardless of the coal type. Because temperature changes can be grasped, the heat generation status of coal stored inside silo 21 can be predicted in advance.

[0066] In the above-described embodiment, by installing a large number of CO sensors 23, the distribution of CO concentration inside the silo 21 can be determined, which can lead to the identification of heat-generating areas. Furthermore, it is also effective to use thermocouples in the heat-generating areas identified from the CO concentration distribution. That is, the estimation means 25 can more accurately grasp the temperature by comparing the actual temperature detected by the thermocouple with the estimated temperature at the time the estimated temperature (Ta) is calculated.

[0067] A third embodiment of the present invention will be described with reference to FIG.

[0068] FIG. 11 shows a schematic configuration of a state in which a temperature monitoring device for a carbon-based solid fuel according to a third embodiment of the present invention is applied to a roller mill that crushes coal to produce pulverized coal.

[0069] As shown in the figure, coal is carried into roller mill device 40, where it is pulverized into pulverized coal by rotating table 41 and rollers 42. The pulverized coal obtained by roller mill device 40 is transported by hot air and sent to a boiler (not shown).

[0070] There is a risk that pulverized coal may accumulate around the roller shaft 43 of the roller 42. In order to detect in advance the risk of spontaneous combustion due to heat generation in the area where the pulverized coal has accumulated (the area where coal actually exists), a coal temperature monitoring device is provided that monitors the temperature of the pulverized coal accumulated around the roller shaft 43.

[0071] A CO sensor 44 is provided to detect the CO situation around the roller shaft 43, and gas is sucked in by a suction pump 45. The detection information from the CO sensor 44 is input to an estimation means 46. A temperature sensor 47 is provided around the roller shaft 43 as actual temperature detection means for detecting the actual temperature around the roller shaft 43. The detection information from the temperature sensor 47 is input to the estimation means 46.

[0072] In the estimation means 46, as in the first and second embodiments, the rate of change of the CO concentration and the amount of CO generated per unit time (CO generation rate) are obtained, and these are correlated with the rate of change of the temperature of the pulverized coal (temperature rise rate), thereby determining the change in the temperature of the pulverized coal.

[0073] Therefore, by correlating the rate of change in CO concentration or the amount of CO generated per unit time (CO generation rate) with the rate of change in temperature (rate of temperature rise), it becomes possible to grasp the change in temperature of the pulverized coal remaining inside the roller mill apparatus 40, regardless of the coal type. Because the temperature change can be grasped, the heat generation status of the roller mill apparatus 40 can be predicted in advance.

[0074] In the above-described embodiment, the change in coal temperature was grasped by correlating the rate of change in CO concentration or the amount of CO generated per unit time (CO generation rate) with the rate of change in temperature (rate of temperature rise), but if the coal type, etc. is known in advance, it is also possible to correlate the CO concentration with the change in temperature. Furthermore, in the above-described embodiment, coal was used as an example of a carbon-based solid fuel, but it is also possible to use biomass fuels (woody biomass, biomass charcoal, sludge charcoal, etc.), refuse-derived fuels (RDF, RPF, etc.), etc. as the carbon-based solid fuel. [Industrial Applicability]

[0075] The present invention relates to a temperature monitoring device for carbon-based solid fuel that monitors the temperature of the carbon-based solid fuel. Place It can be used in the industrial field. [Explanation of symbols]

[0076] 1 coal pile 2 Pipes 3, 23, 44 CO sensors 4, 24, 45 Suction pump 5, 25, 46 Estimation means 6,26,47 Temperature sensor 11. CO concentration change rate estimation method 12, 32 Temperature rise rate derivation method 13, 33 Temperature estimation function 21 Silo 22 tubes 31 CO generation rate estimation method 32 Temperature rise rate calculation method 33 Temperature estimation function 40 Roller mill equipment 41 Table 42 Laura 43 Roller shaft

Claims

1. CO detection means for detecting the concentration of CO, which is the state of CO in the existing carbon-based solid fuel; a relationship storage means for storing the relationship between the rate of change of the CO concentration and the temperature; an estimation means for correlating the CO concentration detected by the CO detection means with the relationship stored in the relationship storage means and determining the temperature status of the carbon-based solid fuel, The relationship storage means includes: a relationship between a rate of change in the CO concentration and a rate of change in the temperature of the carbon-based solid fuel is stored; The estimation means By correlating the rate of change in the CO concentration with the rate of change in the temperature of the carbon-based solid fuel, the change in the temperature of the carbon-based solid fuel is integrally estimated and understood. A temperature monitoring device for carbon-based solid fuel.

2. CO detection means for detecting the amount of CO generated, which is the CO status of the existing carbon-based solid fuel; a relationship storage means for storing the relationship between the amount of CO generated per unit time and temperature; an estimation means for correlating the amount of CO generated detected by the CO detection means with the relationship stored in the relationship storage means, and determining the temperature status of the carbon-based solid fuel; The relationship storage means includes: a relationship between the amount of CO generated per unit time and the rate of change of the temperature of the carbon-based solid fuel is stored; The estimation means By correlating the amount of CO generated per unit time with the rate of change in the temperature of the carbon-based solid fuel, the change in the temperature of the carbon-based solid fuel is integrally estimated and understood. A temperature monitoring device for carbon-based solid fuel.

3. In the temperature monitoring device for carbon-based solid fuel according to claim 1 or claim 2, an actual temperature detection means for detecting an actual temperature of the carbon-based solid fuel; The estimation means The actual temperature detected by the actual temperature detection means is used as an initial value, and the initial value is taken into account in a temperature change determined based on the CO status detected by the CO detection means, thereby estimating the temperature of the carbon-based solid fuel. A temperature monitoring device for carbon-based solid fuel.

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