JP7409577B1 - Vertical carbonization furnace operating method, ferro coke production method, and vertical carbonization furnace equipment - Google Patents

Abstract

Provided are a method for operating a vertical carbonization furnace, a method for producing ferro coke, and a control device for the vertical carbonization furnace, which can detect operational abnormalities in the vertical carbonization furnace due to imbalance of ventilation inside the furnace. A method of operating a vertical carbonization furnace for producing ferrocoke, the vertical carbonization furnace 10 includes a carbonization furnace main body 12, one or more high-temperature tuyeres 13 for blowing high-temperature gas into the carbonization furnace main body, and high-temperature tuyeres. 13, two or more extraction tuyeres 16 are provided at different positions in the height direction from the carbonization furnace main body, and the two or more extraction tuyeres 16 are provided at the same height in the width direction. an acquisition step for acquiring the flow rate of gas discharged from each of the extraction tuyeres 16, and an operation abnormality detected when the flow rate acquired in the acquisition step falls outside a predetermined flow rate range. and a determination step of making a determination.

Description

The present invention relates to a method for operating a vertical carbonization furnace for producing ferro coke, a method for producing ferro coke, and equipment for a vertical carbonization furnace.

Ferro coke is produced by carbonizing coal together with an iron-containing substance such as iron ore, and contains fine particulate metallic iron produced by reducing the iron-containing substance. This metal iron has a catalytic function that promotes a reaction in which CO ₂ generated as the reaction progresses in the blast furnace reacts with coke (C) to regenerate CO, which is a reducing gas. For this reason, when ferro coke is used, the gasification reaction of coke starts from the low temperature part in the blast furnace, so the temperature of the heat storage zone can be lowered. Therefore, it is thought that the use of ferro coke greatly reduces the reducing agent ratio, thereby contributing to energy saving and reduction of CO ₂ emissions. Because of this usefulness, research on the production technology of ferro coke is underway.

A typical indoor coke oven is constructed of silica bricks. For this reason, when iron ore is charged and carbonized, silica, which is the main component of silica bricks, reacts with the iron ore, producing low melting point fireite. Since damage to the silica bricks caused by this reaction is a problem, production of ferro coke using a conventional indoor coke oven has not been carried out industrially. Therefore, a production method using a vertical carbonization furnace has been proposed as a method for producing ferro coke in place of a production method using a chamber coke oven.

This manufacturing method uses a vertical carbonization furnace made of chamotte bricks rather than silica bricks. The raw materials, coal and iron ore, are mixed with a binder, molded into a predetermined size, and charged into a vertical carbonization furnace. Then, the molded product is carbonized by blowing a heat transfer gas into the vertical furnace and heating it, thereby producing molded ferro coke. By using this method, briquette coal can be evenly carbonized without damaging the bricks due to iron ore.

As a vertical carbonization furnace used for producing ferro coke, Patent Document 1 describes a vertical carbonization furnace that can uniformly heat molded products by controlling the flow of high-temperature gas by providing a gas outlet in the carbonization furnace main body. Disclosed.

Moreover, Patent Document 2 discloses a heating rate design method for carbonizing a molded product under optimal heating conditions. According to Patent Document 2, by carbonizing a molded product with an optimal heat pattern, it is possible to prevent cracks and thermal cracking of the molded product that occur during carbonization, and to suppress deterioration in the quality of ferro coke.

Patent No. 6274126 Patent No. 5087868

If fine powder gets mixed into the vertical carbonization furnace, the ventilation balance in the furnace will be disrupted, so even if a gas outlet is provided, the flow of high-temperature gas cannot be controlled. Similarly, if the ventilation balance in the furnace is disrupted due to the incorporation of fine powder, the heat pattern will also become uncontrollable. When the temperature difference in the furnace in the horizontal direction becomes large due to an imbalance in the ventilation inside the furnace, molded products that are carbonized in the low temperature area will have poor carbonization, resulting in the production of ferro coke that has low strength and cannot be used as a raw material for blast furnaces. There was the issue of putting it away.

The present invention has been made in view of the problems of the prior art, and its purpose is to improve the operation of a vertical carbonization furnace that can detect operational abnormalities in the vertical carbonization furnace due to imbalance of ventilation inside the furnace. The present invention provides a method for producing ferro coke, and a control device for a vertical carbonization furnace.

The gist of the present invention that can solve the above problems is as follows.
[1] A method for operating a vertical carbonization furnace for producing ferrocoke, the vertical carbonization furnace comprising: a carbonization furnace main body; one or more high-temperature tuyeres for blowing high-temperature gas into the carbonization furnace main body; two or more extraction tuyeres that are provided at different positions in the height direction from the high-temperature tuyeres and discharge gas from the carbonization furnace main body, and the two or more extraction tuyeres are at the same height. an acquisition step of acquiring the flow rate of gas discharged from each of the extraction tuyeres provided at different positions in the width direction; and a case where the flow rate acquired in the acquisition step is outside a predetermined flow rate range. A method for operating a vertical carbonization furnace, comprising: a determination step of determining that there is an operational abnormality.
[2] The operation of the vertical carbonization furnace according to [1], wherein in the acquisition step, the flow rate of gas discharged from each extraction tuyere is acquired by measuring the vibration of each of the extraction tuyeres. Method.
[3] In the acquisition step, the flow rate of gas discharged from each extraction tuyere is acquired from the vibration from which the frequency component of the vibration that causes disturbance has been removed, and the frequency component of the vibration that causes the disturbance is determined in advance from the vibration that causes the disturbance. The method for operating a vertical carbonization furnace according to [2], wherein the method is specified by principal component analysis of the frequency component of the vibration and determining the load amount of the principal component.
[4] The frequency component of the vibration that becomes the disturbance is identified by evaluating, for each frequency, the proportion at which the load amount of the principal component determined by the principal component analysis is equal to or greater than a predetermined value. A method of operating a vertical carbonization furnace described in ].
[5] In the acquisition step, the furnace temperatures at two or more positions that are the same in the height direction but different in the width direction are further acquired, and the difference in the furnace temperatures is equal to or greater than a predetermined temperature difference. The method for operating a vertical carbonization furnace according to any one of [1] to [4], wherein an abnormality in operation is determined in a certain case.
[6] Further comprising an adjusting step of adjusting the flow rate of the gas discharged from the extraction tuyere so that the flow rate falls within a predetermined flow rate range when an operational abnormality is determined in the determining step. A method for operating a vertical carbonization furnace according to any one of [1] to [5].
[7] A method for producing ferro coke, comprising operating a vertical carbonization furnace using the operating method for a vertical carbonization furnace described in [6] to produce ferro coke.
[8] Vertical carbonization furnace equipment for producing ferro coke, comprising a vertical carbonization furnace, two or more flow rate sensors that measure the flow rate of gas, and a control device that controls the vertical carbonization furnace. The vertical carbonization furnace includes a carbonization furnace main body, a charging port into which a molded product serving as a raw material for ferro coke is charged, and one or more high-temperature tuyeres for blowing high-temperature gas into the carbonization furnace main body. having two or more extraction tuyeres provided at different positions in the height direction from the high temperature tuyeres and discharging the gas in the carbonization furnace main body, and an exhaust port discharging the carbonized molded product, The two or more extraction tuyeres are provided at different positions in the width direction, the two or more flow rate sensors are provided in each of the two or more extraction tuyeres, and the control device is configured to control the flow rate from the flow rate sensor to the extraction tuyere. an acquisition unit that acquires data indicating the flow rate of the gas to be discharged; a calculation unit that calculates the flow rate of the gas discharged from each extraction tuyere from the data; Vertical carbonization furnace equipment, comprising: a determination unit that determines that there is an operational abnormality when the
[9] The vertical carbonization furnace equipment according to [8], wherein the flow rate sensor is a vibration meter.
[10] The vertical carbonization furnace equipment according to [9], further comprising a disturbance removal filter, wherein the disturbance removal filter removes a predetermined frequency component from the vibrations measured by the vibration meter.
[11] The frequency component is predetermined by performing a principal component analysis of the frequency component of the vibration that is a disturbance, and evaluating for each frequency the proportion at which the load amount of the principal component is equal to or greater than a predetermined value. The vertical carbonization furnace equipment according to [10].
[12] The furnace further includes two or more temperature sensors that measure the temperature inside the furnace, and the temperature sensors are provided at two or more different positions in the width direction at the same height in the vertical carbonization furnace, The acquisition unit acquires the furnace temperature from each temperature sensor, and the determination unit determines that the operation is abnormal when the difference in the furnace temperature acquired from each temperature sensor is greater than or equal to a predetermined temperature difference. The vertical carbonization furnace equipment according to any one of [8] to [11].
[13] When the determination unit determines that the operation is abnormal, the determination unit adjusts the flow rate of the gas discharged from the extraction tuyere so that the flow rate is within a predetermined flow rate range; The vertical carbonization furnace equipment according to any one of [8] to [12].

By implementing the method for operating a vertical carbonization furnace according to the present invention, it is possible to detect an operational abnormality in the vertical carbonization furnace due to a collapse of the ventilation balance in the furnace. In this way, if an abnormality in the operation of the vertical carbonization furnace can be detected, measures can be taken to restore the ventilation balance in the furnace, thereby suppressing the production of ferro coke with low strength due to poor carbonization.

FIG. 1 is a schematic perspective view of vertical carbonization furnace equipment 100 in which the method for operating a vertical carbonization furnace according to the present embodiment can be carried out. FIG. 2 is a schematic cross-sectional view of the vertical carbonization furnace 10. FIG. 3 is a schematic cross-sectional view of the extraction tuyere 16. FIG. 4 is a schematic diagram showing a flow path of gas discharged from the extraction tuyere 16. FIG. 5 is a block diagram showing the configuration of the control device 50. As shown in FIG. FIG. 6 is a graph showing the relationship between the effective acceleration value and the gas flow rate. FIG. 7 is a graph showing the relationship between the effective value of acceleration at the extraction tuyere 16 and the total flow rate. FIG. 8 is a graph showing the proportion of high correlation coefficients between gas and disturbance vibration. FIG. 9 is a graph showing the proportion of high correlation coefficients of vibrations that are disturbances. FIG. 10 is a flowchart showing an example of the processing of the method for operating the vertical carbonization furnace according to the present embodiment. FIG. 11 is a flowchart showing another example of the processing of the method for operating the vertical carbonization furnace according to the present embodiment. FIG. 12 is a graph showing changes in the furnace temperatures of unit A and unit B.

Hereinafter, the present invention will be explained through embodiments of the present invention. FIG. 1 is a schematic perspective view of vertical carbonization furnace equipment 100 in which the method for operating a vertical carbonization furnace according to the present embodiment can be carried out. Further, FIG. 2 is a schematic cross-sectional view of the vertical carbonization furnace 10. 2(a) is a sectional view taken along line AA in FIG. 1, and FIG. 2(b) is a sectional view taken along line BB in FIG. 2(a).

The vertical carbonization furnace equipment 100 is equipment that carbonizes a molded product that is a raw material for ferrocoke to produce ferrocoke. A molded product that is a raw material for ferro coke is produced by cold molding a raw material containing an iron-containing raw material such as iron ore, a carbon-containing raw material such as coal, and a binder using a roll molding machine.

As shown in FIGS. 1 and 2, the vertical carbonization furnace equipment 100 includes a vertical carbonization furnace 10, an acceleration sensor 20, a temperature sensor 30, a flow control valve 40, and a control device 50. Further, the vertical carbonization furnace 10 has a charging inlet 11, a carbonization furnace main body 12, a high temperature tuyere 13, a low temperature tuyere 14, a cooling tuyere 15, an extraction tuyere 16, and a discharge port 17. . The charging port 11 is provided above the carbonization furnace main body 12 . The charging port 11 is an opening for charging a molded product, which is a raw material for ferro coke, into the carbonization furnace main body 12. The vertical carbonization furnace 10 is provided with two charging ports 11.

The carbonization furnace body 12 is a cylindrical furnace with a rectangular horizontal cross section, and has two furnace walls 12a provided at positions where the horizontal cross sections are the long sides and two furnace walls 12a installed at positions where the horizontal cross sections are the short sides. It is composed of a wall 12b. A refractory material is provided on the inside of the furnace walls 12a, 12b, and an iron skin as an external structure is provided on the outside.

The discharge port 17 is provided at the lower end of the carbonization furnace body 12. From the discharge port 17, ferro coke produced by carbonization in the furnace is discharged. The ferro coke discharged from the discharge port 17 is transported to a product hopper (not shown) by a transport conveyor (not shown), and is used as a blast furnace raw material.

A total of eight high-temperature tuyeres 13 are provided, four on each of the two furnace walls 12a. The four high-temperature tuyeres 13 are provided at the same height and at equal intervals at different positions in the width direction. High-temperature gas heated to, for example, 800 to 1100° C. is blown into the furnace through the high-temperature tuyere 13 by a heating device provided outside the furnace. Preferably, high-temperature gas heated to 900 to 1000° C. is blown into the furnace from the high-temperature tuyere 13. In addition, in this embodiment, the width direction means the direction in which the horizontal cross section of the carbonization furnace main body 12 is the long side.

The low-temperature tuyere 14 is provided at the same position as the high-temperature tuyere 13 in the width direction of the two furnace walls 12a, and four in each position higher than the high-temperature tuyere 13 in the height direction, for a total of eight. Low-temperature gas heated to, for example, 400 to 700° C. by a heating device provided outside the furnace is blown into the furnace through the low-temperature tuyeres 14. In this manner, the vertical carbonization furnace 10 is provided with high-temperature tuyere 13 and low-temperature tuyere 14 in two stages, upper and lower, and high-temperature gas and low-temperature gas are blown into these tuyeres. This makes it possible to heat the molded product over a wider range than when high-temperature air is blown through one stage of high-temperature tuyeres, resulting in a vertical carbonization furnace that can efficiently carbonize the molded product.

A total of eight cooling tuyeres 15 are provided near the discharge port 17, four on each of the two furnace walls 12a. Cooling gas at a temperature of 25 to 80°C is blown into the furnace through the cooling tuyeres 15. In this way, by blowing cooling gas through the cooling tuyere 15, the temperature of the carbonized ferrocoke discharged from the discharge port 17 can be lowered, so that the molded product can be continuously carbonized. Furthermore, if the temperature of ferro coke can be lowered in this way, there is no need to provide cooling equipment to cool the ferro coke, so the equipment cost for the cooling equipment and the transportation cost for transporting the ferro coke to the cooling equipment can be reduced.

The extraction tuyere 16 is located at the same position as the high temperature tuyere 13 in the width direction of the two furnace walls 12a, and there are 4 extraction tuyeres each between the cooling tuyere 15 and the high temperature tuyere 13 in the height direction, 8 in total. A book is provided. From the extraction tuyere 16, gas at 0 to 500° C., which is a mixture of high temperature gas, low temperature gas, and cooling gas, is discharged to the outside of the furnace. In this way, by providing the high-temperature tuyere 13, the low-temperature tuyere 14, and the extraction tuyere 16 facing each other at different positions in the width direction of the two furnace walls 12a, the horizontal cross section inside the carbonization furnace body 12 is We aim to equalize the temperature inside the furnace.

FIG. 3 is a schematic cross-sectional view of the extraction tuyere 16. A flow control valve 40 is provided at the tip of each extraction tuyere 16. By adjusting the opening degree of the flow control valve 40, the flow rate of gas discharged from the extraction tuyere 16 is adjusted. Further, the extraction tuyere 16 is provided with two branch portions 19 . By providing the two branch parts 19, dust and foreign matter contained in the gas discharged from the extraction tuyere 16 can be separated into the branch parts 19.

The acceleration sensor 20 is provided on the outer wall surface of each extraction tuyere 16. The acceleration sensor 20 measures vibration data on the outer wall surface of the extraction tuyere 16 as data indicating the flow rate of gas discharged from the extraction tuyere 16 . The acceleration sensor 20 outputs the measured vibration data to the control device 50 together with the identification data of the acceleration sensor. Note that in this embodiment, the acceleration sensor 20 is an example of a vibration meter.

Referring again to FIG. Eight temperature sensors 30 are provided on the inner wall surfaces of the two furnace walls 12a at the same height and at equal intervals at different positions in the width direction. In the example shown in FIG. 2, they are provided at the same position as the extraction tuyere 16 in the width direction, and in the vicinity of the extraction tuyere 16. The temperature sensor 30 measures the temperature inside the furnace at each position and outputs the acquired temperature data to the control device 50 together with the identification data of the temperature sensor. Note that the temperature sensor 30 is not limited to the vicinity of the extraction tuyere 16, but may be provided at different positions in the carbonization furnace main body 12 in the height direction.

The control device 50 acquires data indicating the flow rate of gas from the acceleration sensor 20, and calculates the flow rate of the gas discharged from the extraction tuyere 16 from the data. The control device 50 determines whether the calculated gas flow rate is outside a predetermined flow rate range.

When the air permeability in a part of the vertical carbonization furnace 10 deteriorates and the ventilation balance in the furnace is disrupted, the waste is discharged from the extraction tuyere 16 provided at the same widthwise position as the area where the air permeability deteriorates. The flow rate of the gas discharged from the other extraction tuyeres 16 increases. Therefore, by determining whether or not the flow rate of gas discharged from the extraction tuyere 16 is outside a predetermined flow rate range, abnormal operation of the vertical carbonization furnace 10 due to an imbalance in the ventilation inside the furnace can be detected. can. Note that the predetermined flow rate range is the flow rate of gas discharged from the extraction tuyere 16 under normal operating conditions, and the condition in which the difference in horizontal furnace temperature becomes 50°C due to experimentally disrupted ventilation balance. Using the flow rate of the gas discharged from the extraction tuyere 16 when

The control device 50 determines that the vertical carbonization furnace 10 is operating abnormally when the flow rate of gas discharged from the extraction tuyere 16 falls outside a predetermined flow rate range. On the other hand, the control device 50 determines that the vertical carbonization furnace 10 is in normal operation when the flow rate of the gas discharged from the extraction tuyere 16 is within a predetermined flow rate range. Thereby, the control device 50 can detect an operational abnormality of the vertical carbonization furnace 10 due to an imbalance of ventilation inside the furnace.

When it is determined that the vertical carbonization furnace 10 is operating abnormally, the control device 50 controls the flow rate control valve 40 so that the flow rate of gas discharged from the extraction tuyere 16 is within a predetermined flow rate range. The opening degree is adjusted to adjust the flow rate of gas discharged from the extraction tuyere 16. For example, when the flow rate of gas discharged from a particular extraction tuyere 16 exceeds a predetermined flow rate range, the control device 50 narrows the opening degree of the flow rate control valve 40 of the extraction tuyere 16. The flow rate of gas discharged from the extraction tuyere 16 is reduced. Thereby, the flow rate of the gas discharged from the specific extraction tuyere 16 is reduced, and the flow rate of the gas can be kept within a predetermined flow rate range.

Note that the predetermined flow rate range is not limited to the gas flow rate range, and may be the upper limit value of the gas flow rate or the lower limit value of the gas flow rate. When an upper limit value is determined, if the upper limit value is exceeded, it is determined that the flow rate is outside the range. Furthermore, in the case where a lower limit value is determined, if the flow rate is less than the lower limit value, it is determined that the flow rate is outside the range. Note that the upper limit value of the predetermined flow rate range is, for example, 114, assuming that the flow rate (reference flow rate) of gas discharged from the extraction tuyere 16 during normal operation is 100. That is, the control device 50 determines that there is an operational abnormality when the gas flow rate is greater than 1.14 times the reference flow rate. Note that this upper limit value was determined based on the increase in the gas flow rate of the other extraction tuyeres 16 when one of the eight extraction tuyeres 16 is blocked.

Further, when the flow rate of gas discharged from the extraction tuyere 16 is less than a predetermined flow rate range, the control device 50 widens the opening degree of the flow rate control valve 40 to discharge the gas from the extraction tuyere 16. Increase the flow rate of gas. This increases the flow rate of the gas discharged from the specific extraction tuyere 16, making it possible to keep the flow rate within a predetermined flow rate range.

Further, the control device 50 may obtain the furnace temperature from the temperature sensor 30. The control device 50 may determine that there is an operational abnormality when the difference in furnace temperatures obtained from the temperature sensors 30 provided at the same height is greater than or equal to a predetermined temperature difference. That is, in this case, the control device 50 controls the vertical carbonization furnace 10 when the gas flow rate is outside the predetermined flow rate range and the difference in furnace temperature is greater than or equal to the predetermined temperature difference. It may be determined that there is an operational abnormality. Note that in this embodiment, the predetermined temperature difference is, for example, 50°C.

If the temperature difference in the furnace in the horizontal method at the lower part of the furnace is 50°C or more, uneven cooling of the molded product will occur, and high temperature ferro coke will be discharged from the discharge port 17, which may lead to heat generation and ignition in the product hopper. occurs. Therefore, in order to reliably maintain the temperature difference in the furnace in the horizontal section at less than 50° C., the flow rate range is set in consideration of a predetermined safety factor. Therefore, even if the flow rate of the gas discharged from the extraction tuyere 16 is outside the predetermined flow rate range, the temperature difference in the furnace in the horizontal section is not necessarily greater than the predetermined temperature difference. On the other hand, by detecting the operational abnormality of the vertical carbonization furnace 10 based on the difference in temperature inside the furnace, the operational abnormality of the vertical carbonization furnace 10 can be detected more reliably.

In the vertical carbonization furnace 10, when the flow rate of gas increases, the temperature inside the furnace decreases, and when the flow rate of gas decreases, the temperature inside the furnace increases. Furthermore, if the flow rate of the gas discharged from the extraction tuyere 16 is increased, the flow rate of the cooling gas increases, so that the temperature in the furnace near the extraction tuyere 16 becomes lower. On the other hand, if the flow rate of the gas discharged from the extraction tuyere 16 is reduced, the flow rate of the cooling gas will be reduced and the high-temperature molded product will pass through, so the temperature inside the furnace near the extraction tuyere 16 will increase. .

Therefore, when it is determined that the vertical carbonization furnace 10 is operating abnormally, the control device 50 adjusts the opening degree of the flow rate control valve 40 so that the difference in temperature within the furnace becomes less than a predetermined temperature. to adjust the flow rate of gas discharged from the extraction tuyere 16. For example, the control device 50 increases the flow rate of the gas discharged from the extraction tuyere 16 by widening the opening degree of the flow rate control valve 40 at the position of the temperature sensor that outputs the high furnace temperature. As a result, the furnace temperature at the position where the high furnace temperature is output can be lowered, so that the difference in the furnace temperature can be made less than a predetermined temperature.

FIG. 4 is a schematic diagram showing a flow path of gas discharged from the extraction tuyere 16. As shown in FIG. 4, the gas discharged from the eight extraction tuyeres 16 merges into one flow path 70 and is discharged. In the flow path 70, the pressure of the gas is measured by the pressure sensor 72, the flow rate of the gas is measured by the flow rate sensor 74, and the temperature of the gas is measured by the temperature sensor 76 as operational data of the vertical carbonization furnace 10. These operation data are output to the control device 50 and stored in the control device 50.

FIG. 5 is a block diagram showing the configuration of the control device 50. The control device 50 is, for example, a general-purpose computer such as a workstation or a personal computer. The control device 50 includes a control section 52, an input section 54, an output section 56, and a storage section 58. The control unit 52 is, for example, a CPU or the like, and causes the control unit 52 to function as an acquisition unit 60, a calculation unit 62, and a determination unit 64 by executing a program read from the storage unit 58.

The input unit 54 is, for example, a keyboard, a touch panel provided integrally with a display, or the like. The output unit 56 is, for example, an LCD or CRT display. The storage unit 58 is, for example, an information recording medium such as an update-recordable flash memory, a built-in hard disk or a hard disk connected to a data communication terminal, a memory card, and a read/write device thereof. The storage unit 58 stores programs for the control unit 52 to execute various functions, data used by the programs, and the like.

The vibration data output from the acceleration sensor 20 provided at each extraction tuyere 16 is amplified by an amplifier 22, and low frequency components are removed by an HPF (high pass filter) 24. The acquisition unit 60 acquires vibration data that has been amplified and has low frequency components removed, and identification data of the acceleration sensor 20. The acquisition unit 60 outputs the acquired vibration data and identification data to the calculation unit 62.

The calculation unit 62 converts the acquired vibration data into an effective acceleration value. The calculation unit 62 reads a regression equation showing the correspondence between the gas flow rate and the effective acceleration value from the storage unit 58, and calculates the flow rate of the gas discharged from each extraction tuyere 16 using the effective acceleration value and the regression equation. Calculate.

Here, the relationship between gas flow rate and vibration data will be explained. An acceleration sensor was attached to a JIS standard 25A steel pipe, vibration data was obtained when air was flowed through the steel pipe at a rate of 0 to 25 L/min, and the relationship between the flow rate of gas flowing through the steel pipe and the vibration data was confirmed. The effective value of acceleration was used as the vibration data. The effective value of acceleration in the 0 to T section in the vibration data represented by f(t) can be calculated using the following equation (1).

FIG. 6 is a graph showing the relationship between the effective acceleration value and the gas flow rate. In FIG. 6, the horizontal axis is the flow rate (L/min), and the vertical axis is the effective acceleration value (m/s ² ). As shown in FIG. 6, as the gas flow rate increased, the effective value of acceleration also increased. From this result, it was confirmed that there is a correlation between the gas flow rate and the effective value of acceleration.

Therefore, an acceleration sensor 20 is installed on the outer wall surface of the extraction tuyere 16 using the vertical carbonization furnace 10, and the relationship between the vibration data and the flow rate when the flow rate of gas discharged from the extraction tuyere 16 is changed is calculated. confirmed. In addition, the gas immediately after being discharged from the extraction tuyere 16 contains powder obtained by turning the molded coal into dust and volatile matter vaporized from the molded coal, and the temperature of the gas is a high temperature close to 500°C. Because of this, it was difficult to measure with a normal flow meter, so we combined the gas discharged from the eight extraction tuyeres 16 and measured the flow rate of the gas after removing dust, etc. contained in the gas using an orifice type flow meter. Measured with a meter.

FIG. 7 is a graph showing the relationship between the effective value of acceleration at the extraction tuyere 16 and the total flow rate. In FIG. 7, the horizontal axis is the total flow rate (L/min), and the vertical axis is the effective acceleration value (m/s ² ). This effective acceleration value is the sum of the effective values of vibrations measured by the eight acceleration sensors 20 shown in FIG. As shown in FIG. 7, it was confirmed that the effective value of acceleration increases in proportion to the total flow rate. In this way, since there is a correspondence between the effective value of acceleration and the total flow rate, if a regression formula that shows the correspondence between the effective value of gas and the effective value of acceleration is obtained in advance, the effective value of acceleration and the regression formula can be calculated in advance. By using this, the flow rate of gas discharged from the extraction tuyere 16 can be calculated.

Therefore, if a regression equation indicating the correspondence between the gas flow rate and the effective acceleration value is obtained in advance and the regression equation is stored in the storage section 58, the calculation section 62 can calculate the effective acceleration value and the regression equation. can be used to calculate the flow rate of gas discharged from each extraction tuyere 16. The calculation unit 62 outputs the gas flow rate calculated in this way to the determination unit 64.

Note that the vibration data output from the acceleration sensor 20 includes not only vibrations caused by the gas discharged from the extraction tuyere 16 but also vibrations of the carbonization furnace main body 12. Since the vibration frequency of the carbonization furnace main body 12 often appears in a low frequency band, for example, by removing the low frequency component of the vibration data using the HPF 24 described above, the calculation accuracy of the gas flow rate can be improved. Note that the HPF 24 is an example of a disturbance removal filter that removes a frequency component of vibration that causes disturbance.

Next, the frequency components removed by the HPE 24 will be explained. The vibration data output from the acceleration sensor 20 includes not only gas vibrations but also vibrations caused by peripheral equipment and other disturbances. Therefore, if the vibration data is used as is, the accuracy of calculating the gas flow rate may decrease. Therefore, by changing the production amount of ferro coke, we changed the flow rate of the gas discharged from the extraction tuyere 16 and the vibration that causes disturbance, and the vibration that causes disturbance such as the vibration of peripheral equipment without discharging the gas. The changed vibrations were measured, and the frequency analysis (FFT) results of these vibration data were subjected to principal component analysis to determine the proportion of high correlation coefficients with a loading amount of the first principal component of 0.7 or more. Here, the existence ratio of high correlation coefficients means that the signal strength is analyzed every 1 Hz in the range up to 12.5 kHz by frequency analysis, the obtained frequency analysis data is analyzed for principal components, and the first principal component is calculated every 100 Hz. It means the ratio of the number of components whose loading amount is 0.7 or more.

FIG. 8 is a graph showing the proportion of high correlation coefficients between gas and disturbance vibration. FIG. 9 is a graph showing the proportion of high correlation coefficients of vibrations that are disturbances. In FIGS. 8 and 9, the horizontal axis represents frequency (Hz), and the vertical axis represents the proportion (%) of high correlation coefficients.

As shown in FIG. 8, in the case of gas and vibration as a disturbance, a high correlation coefficient with a load amount of the first principal component of 0.7 or more existed over the entire frequency band. From this result, it was confirmed that a wide frequency component contributed to the vibration of the gas and the vibration that caused disturbance. On the other hand, as shown in Fig. 9, in the vibration that is a disturbance, a high correlation coefficient with a load amount of the first principal component of 0.7 or more exists in the frequency band below 5kHz, and a high correlation coefficient in the frequency band higher than 5kHz exists. It didn't really exist. From this result, it was confirmed that frequency components of 5 kHz or less contributed to the disturbance vibration. Note that the first principal component loading amount of 0.7, which is a value indicating a high correlation, is an example of a predetermined principal component loading amount.

As mentioned above, frequency components of 5 kHz or less contribute to vibrations that cause disturbances, so if the HPF 24 is used to remove frequency components of 5 kHz or less from vibration data, the influence of vibrations that cause disturbances is reduced. Therefore, the accuracy of calculating the gas flow rate is improved. As described above, in the operating method of the vertical carbonization furnace according to the present embodiment, the frequency component obtained by frequency analysis of the vibration that is a disturbance that has no correlation with the gas flow rate is subjected to principal component analysis in advance, and the first principal component is The existence ratio at which the load amount is equal to or greater than a predetermined value is evaluated for each frequency. Thereby, it is possible to identify in advance the frequency component that contributes to the vibration that is the disturbance, and the calculation accuracy of the gas flow rate can be improved by removing the frequency component from the vibration data using the disturbance removal filter.

In the above example, an example is shown in which the HPE 24 is used to remove frequency components of 5 kHz or less that cause disturbance, but the present invention is not limited to this. The frequency component of the vibration that causes disturbance may vary depending on the type and size of the surrounding equipment. Therefore, the disturbance removal filter that removes the frequency component of the vibration that causes the disturbance is not limited to the HPE, and a bandpass filter or low-pass filter that removes a predetermined frequency component may be used. Furthermore, the principal component for evaluating the load amount is not limited to the first principal component, and principal components subsequent to the second principal component may be evaluated. What is necessary is to evaluate the load amount of the principal component that is correlated with the vibration that is the disturbance.

The determination unit 64 determines whether the gas flow rate obtained from the calculation unit 62 is outside a predetermined flow rate range. As mentioned above, the predetermined flow rate range is based on an experimental ventilation balance so that the difference between the flow rate of gas discharged from the extraction tuyere 16 and the temperature inside the furnace in the width direction is 50°C under normal operating conditions. It is predetermined using the flow rate of gas discharged from the extraction tuyere 16 when the extraction tuyere 16 is broken, and is stored in the storage unit 58.

The determining unit 64 reads out a predetermined flow rate range from the storage unit 58 and determines whether the gas flow rate obtained from the calculation unit 62 falls outside the predetermined flow rate range. If the gas flow rate obtained from the calculation unit 62 is outside the predetermined flow rate range, the determination unit 64 determines that an operational abnormality has occurred due to an imbalance in the ventilation inside the furnace. On the other hand, when the flow rate of the gas obtained from the calculation unit 62 is within a predetermined range, the calculation unit 62 determines that no operational abnormality has occurred due to an imbalance in the ventilation inside the furnace. When the calculation unit 62 determines that an operational abnormality has occurred due to the collapse of the ventilation balance in the furnace, it may cause the output unit 56 to display an image indicating that an operational abnormality has occurred. In this way, the vertical carbonization furnace equipment 100 according to the present embodiment detects an operational abnormality of the vertical carbonization furnace 10 due to the collapse of the ventilation balance within the furnace.

If it is determined that an operational abnormality has occurred due to the ventilation imbalance in the furnace, the determination unit 64 adjusts the opening degree of the flow rate control valve 40 to adjust the flow rate of gas discharged from the extraction tuyere 16. It is preferable to do so. When the flow rate of gas discharged from a specific extraction tuyere 16 exceeds a predetermined flow rate range, the determination unit 64 determines the correspondence between the identification data stored in the storage unit 58 and the installation position. The table shown in FIG. The determination unit 64 outputs a signal to the flow rate control valve 40 provided in a specific extraction tuyere 16 to narrow the opening degree of the flow rate control valve 40 . As a result, the flow rate of gas discharged from a specific extraction tuyere 16 can be reduced, so the flow rate of gas discharged from a specific extraction tuyere 16 is adjusted to be within a predetermined flow rate range. can.

Further, the control device 50 may acquire temperature data from the temperature sensor 30. In this case, the acquisition unit 60 acquires temperature data from each temperature sensor 30. The acquisition unit 60 outputs the acquired temperature data to the calculation unit 62. The calculation unit 62 identifies the highest temperature data and the lowest temperature data among the four temperature data provided at the same height on the same furnace wall 12a. The calculation unit 62 calculates the difference in furnace temperature by taking the difference between these two temperature data. The calculation unit 62 outputs the calculated difference in furnace temperature to the determination unit 64.

The determination unit 64 determines whether or not the difference in furnace temperature obtained from the calculation unit 62 is a predetermined value of 50° C. or more. When the difference in furnace temperature obtained from the calculation unit 62 is 50° C. or more, the determination unit 64 determines that an operational abnormality has occurred. On the other hand, when the temperature difference obtained from the calculation unit 62 is less than 50° C., the calculation unit 62 determines that no operational abnormality has occurred. When the calculation unit 62 determines that an operational abnormality has occurred, it may cause the output unit 56 to display an image indicating that an operational abnormality has occurred.

If it is determined that an operational abnormality has occurred, the determination unit 64 adjusts the opening degree of the flow rate control valve 40 to adjust the flow rate of gas discharged from the extraction tuyere 16. The determination unit 64 identifies the temperature sensor that outputs the highest temperature data and the temperature sensor that outputs the lowest temperature data, and acquires identification data of these sensors. For example, when lowering the highest temperature, the determination unit 64 identifies the extraction tuyere 16 provided at the same position in the width direction as the temperature sensor that outputs the highest temperature data. The determining unit 64 outputs a signal to increase the opening degree of the flow rate regulating valve 40 provided in the identified extraction tuyere 16, thereby increasing the opening degree of the flow rate regulating valve 40. This increases the flow of low-temperature gas to the position where the highest furnace temperature is output, which cools that position and lowers the temperature, reducing the difference in furnace temperature to less than 50°C. can do. Moreover, when raising the lowest temperature in the furnace, a signal that narrows the opening degree of the flow rate control valve 40 may be output. Thereby, the difference in furnace temperature can be made less than 50°C.

FIG. 10 is a flowchart showing an example of the processing of the method for operating the vertical carbonization furnace according to the present embodiment. A process for detecting an operational abnormality of the vertical carbonization furnace 10 from the gas flow rate and resolving the operational abnormality will be described using FIG. 10. The flow shown in FIG. 10 starts on the condition that the input unit 54 receives an input from the operator to start control by the control device 50.

First, the acquisition unit 60 acquires vibration data from the acceleration sensor 20 (step S101). This process becomes the acquisition step. The acquisition unit 60 outputs the acquired vibration data to the calculation unit 62.

The calculation unit 62 converts the acquired vibration data into an acceleration effective value, and calculates the amount of gas discharged from each extraction tuyere 16 using a regression equation that indicates the correspondence between the acceleration effective value and the gas flow rate. The flow rate is calculated (step S102). The calculation unit 62 outputs the calculated gas flow rate to the determination unit 64.

The determination unit 64 reads out a predetermined flow rate range from the storage unit 58 . The determination unit 64 determines whether the gas flow rate obtained from the calculation unit 62 is outside a predetermined flow rate range (step S103). If the flow rate of the gas obtained from the calculation unit 62 is within the predetermined flow rate range (step S103: No), the determination unit 64 returns the process to step S101, and the gas flow rate is outside the predetermined flow rate range. The processes of step S101 and step S102 are repeatedly executed until the gas flow rate is obtained. On the other hand, if the gas flow rate is outside the predetermined flow rate range (step S103: Yes), the determination unit 64 determines that the operation of the vertical carbonization furnace 10 is abnormal, and 10 operational abnormalities are detected (step S104). The processing in steps S103 and S104 becomes a determination step.

The determination unit 64 adjusts the opening degree of the flow rate control valve 40 to adjust the flow rate of gas discharged from the extraction tuyere 16 whose gas flow rate is outside the predetermined flow rate range (step S105). This process becomes an adjustment step.

The determining unit 64 determines whether the input unit 54 has received an input from the operator to terminate control by the control device 50 (step S106). When receiving an input from the operator to end the control by the control device 50 (step S106: Yes), the determination unit 64 detects an operational abnormality of the vertical carbonization furnace 10 and ends the process of resolving the operational abnormality. . On the other hand, if the input from the operator to end the control by the control device 50 is not received (step S106: No), the determination unit 64 returns the process to step S101 and repeatedly executes the process from step S101. By repeatedly performing these processes, even if the operational abnormality cannot be resolved by adjusting the gas flow rate once, the operational abnormality of the vertical carbonization furnace 10 can be resolved by repeating the process two to three times. Ru.

By executing such processing, the control device 50 can detect an operational abnormality due to a collapse of the ventilation balance in the vertical carbonization furnace 10. Further, the control device 50 can adjust the flow rate of the gas discharged from the extraction tuyere 16 so as to eliminate the operational abnormality.

FIG. 11 is a flowchart showing another example of the processing of the method for operating the vertical carbonization furnace according to the present embodiment. A process for detecting an operational abnormality in the vertical carbonization furnace 10 from the gas flow rate and furnace temperature and resolving the operational abnormality will be described using FIG. 11. The flow shown in FIG. 11 also starts on the condition that the input unit 54 receives an input from the operator to start control by the control device 50.

First, the acquisition unit 60 acquires vibration data from the acceleration sensor 20 and temperature data from the temperature sensor 30 (step S201). This process becomes the acquisition step. The acquisition unit 60 outputs the acquired vibration data and temperature data to the calculation unit 62.

The calculation unit 62 converts the acquired vibration data into an effective acceleration value, and uses the effective acceleration value and a regression equation indicating the correspondence between the effective acceleration value and the gas flow rate to calculate the amount of gas discharged from each extraction tuyere 16. Calculate the flow rate of gas. Furthermore, the calculation unit 62 calculates a temperature difference using the acquired temperature data (step S202). The calculation unit 62 outputs the gas flow rate and temperature difference to the determination unit 64.

The determination unit 64 reads out a predetermined flow rate range from the storage unit 58 . The determination unit 64 determines whether the gas flow rate obtained from the calculation unit 62 is outside a predetermined flow rate range (step S203). If the gas flow rate is within the predetermined flow rate range (step S203: No), the determination unit 64 returns the process to step S201, and determines whether the gas flow rate outside the predetermined flow rate range is acquired. The processes of step S201 and step S202 are repeatedly executed until the process is completed. On the other hand, if the gas flow rate is outside the predetermined flow rate range (step S203: Yes), the determination unit 64 advances the process to step S204.

The determination unit 64 determines whether the temperature difference obtained from the calculation unit 62 is 50° C. or more (step S204). When the determination unit 64 determines that the temperature difference obtained from the calculation unit 62 is less than 50° C. (step S204: No), the determination unit 64 returns the process to step S201. On the other hand, if the temperature difference is 50° C. or more (Step S204: Yes), the determination unit 64 determines that the operation of the vertical carbonization furnace 10 is abnormal, and detects the operational abnormality of the vertical carbonization furnace 10. (Step S205). In the example shown in FIG. 11, the processing in steps S203 to S205 is the determination step.

The determination unit 64 adjusts the opening degree of the flow rate control valve 40 to detect, for example, the gas discharged from the extraction tuyere 16 provided at the same position in the width direction of the temperature sensor 30 that outputs the highest temperature data. (step S206). This process becomes an adjustment step.

The determination unit 64 determines whether the input unit 54 has received an input from the operator to terminate control by the control device 50 (step S207). When receiving an input from the operator to end the control by the control device 50 (step S207: Yes), the determination unit 64 detects an operational abnormality of the vertical carbonization furnace 10 and ends the process of resolving the operational abnormality. . On the other hand, if the determination unit 64 does not receive an input from the operator to end the control by the control device 50 (step S207: No), the determination unit 64 returns the process to step S201 and repeats the process from step S102. Execute.

By performing such processing, the control device 50 controls the operation of the vertical carbonization furnace 10 based on the criterion of an operational abnormality that may cause a carbonization failure, that is, the temperature difference in the furnace in the horizontal cross section is 50° C. or more. Abnormalities can be detected. Further, the control device 50 can adjust the flow rate of the gas discharged from the extraction tuyere 16 so as to eliminate the operational abnormality.

As described above, by using the vertical carbonization furnace equipment 100 according to the present embodiment, it is possible to detect an abnormality in the operation of the vertical carbonization furnace 10 due to the collapse of the ventilation balance in the furnace. In this way, if an abnormality in the operation of the vertical carbonization furnace 10 can be detected, measures can be taken to restore the ventilation balance in the furnace, such as adjusting the flow rate control valve 40, so that ferro coke with low strength due to poor carbonization can be produced. It is also possible to suppress heat generation and ignition within the product hopper. Furthermore, since the ventilation balance in the furnace can be restored without changing the amount of heat input from the high temperature tuyere 13 and the low temperature tuyere 14, an appropriate manufacturing temperature can be maintained, and the occurrence of deformation and cracking of the molded product can be suppressed.

Note that the vertical carbonization furnace equipment 100 according to the present embodiment is a vertical type carbonization furnace having eight high-temperature tuyeres 13, eight low-temperature tuyeres 14, eight extraction tuyeres 16, and eight cooling tuyeres 15. Although the explanation has been made using the carbonization furnace 10, the present invention is not limited thereto. The vertical carbonization furnace 10 does not need to have the low-temperature tuyeres 14 and the cooling tuyeres 15, it only needs to have one or more high-temperature tuyeres 13, and it may have two or more extraction tuyeres 16. That's fine.

Although the extraction tuyere 16 has the same height and is provided at equal intervals on the furnace wall 12a, the present invention is not limited thereto. The extraction tuyeres 16 do not have to be of the same height or evenly spaced. In this way, if the heights and intervals are not the same, the flow rate range for determining abnormal operation will be different for each extraction tuyere, so the gas flow rate during normal operation and the gas flow rate during abnormal operation will be determined for each extraction tuyere. What is necessary is to predetermine a flow rate range that can be determined by the tuyere 16 and determine whether or not there is an operational abnormality for each extraction tuyere 16.

Further, in this embodiment, an example is shown in which the acceleration sensor 20 is used as the flow sensor, but the present invention is not limited to this. Any flow rate sensor may be used as long as it can measure the flow rate of gas discharged from the extraction tuyere 16. Note that when the data output from the flow rate sensor is flow rate data, the calculation unit 62 outputs the flow rate data acquired from the acquisition unit 60 as is to the determination unit 64.

In this example, like the vertical carbonization furnace 10 shown in FIGS. 1 and 2, eight thermocouple temperature sensors 30 were installed near the extraction tuyere 16 at the same horizontal position. Furthermore, acceleration sensors 20 were installed at the eight extraction tuyeres 16 to estimate the flow rate, and a flow rate control valve was installed as a flow rate control device.

FIG. 12 is a graph showing changes in the furnace temperatures of unit A and unit B. In FIG. 12, the horizontal axis is time (hr), and the vertical axis is furnace temperature (° C.). Unit A is one of the four extraction tuyeres provided on the same furnace wall 12a, and unit B is the other one of the four extraction tuyeres. As shown in FIG. 10, during the operation of the vertical carbonization furnace 10, the flow rate of gas discharged from unit A decreases and the temperature inside the furnace rises, and after 9:00, the temperature in unit A and unit B increases. The gas flow rate difference was outside the predetermined range, and the furnace temperature difference was 50°C. For this reason, the opening degree of the flow control valve provided in unit A was widened to increase the flow rate of gas discharged from unit A. As a result, the temperature in the furnace of unit A decreased, and the difference in temperature in the furnace between unit A and unit B became smaller. As a result, the difference in gas flow rate between unit A and unit B is within a predetermined range, and the temperature difference in the furnace is also less than 50°C, making it possible to eliminate malfunctions in the vertical carbonization furnace 10. Ta.

10 Vertical carbonization furnace 11 Charging port 12 Carbonization furnace main body 13 High temperature tuyere 14 Low temperature tuyere 15 Cooling tuyere 16 Extraction tuyere 17 Discharge port 19 Branch 20 Acceleration sensor 22 Amplifier 24 HPF
30 Temperature sensor 40 Flow rate control valve 50 Control device 52 Control unit 54 Input unit 56 Output unit 58 Storage unit 60 Acquisition unit 62 Calculation unit 64 Judgment unit 70 Flow path 72 Pressure sensor 74 Flow rate sensor 76 Temperature sensor 100 Vertical carbonization furnace equipment

Claims (16)

A method of operating a vertical carbonization furnace for producing ferrocoke, the method comprising:
The vertical carbonization furnace is
Carbonization furnace main body,
one or more high-temperature tuyeres for blowing high-temperature gas into the carbonization furnace body;
two or more extraction tuyeres provided at different positions in the height direction from the high temperature tuyeres and discharging gas within the carbonization furnace main body,
The two or more extraction tuyeres are provided at the same height and at different positions in the width direction,
an obtaining step of obtaining a flow rate of gas discharged from each of the extraction tuyere;
a determination step of determining an operational abnormality when the flow rate acquired in the acquisition step is outside a predetermined flow rate range;
A method of operating a vertical carbonization furnace having: 2. The method of operating a vertical carbonization furnace according to claim 1, wherein in the acquisition step, the flow rate of gas discharged from each extraction tuyere is acquired by measuring the vibration of each of the extraction tuyeres. In the acquisition step, the flow rate of gas discharged from each extraction tuyere is acquired from the vibration from which the frequency component of the vibration that causes disturbance has been removed;
3. The operation of the vertical carbonization furnace according to claim 2, wherein the frequency component of the vibration causing the disturbance is specified in advance by principal component analysis of the frequency component of the vibration causing the disturbance and determining the load amount of the principal component. Method. 4. The vertical carbonization furnace according to claim 3, wherein the frequency component of the vibration that causes the disturbance is identified by evaluating, for each frequency, the proportion at which the load amount of the main component is equal to or greater than a predetermined value. Operating method. In the acquisition step, the furnace temperatures at two or more positions that are the same in the height direction but different in the width direction are further acquired, and when the difference in the furnace temperatures is equal to or greater than a predetermined temperature difference, The method for operating a vertical carbonization furnace according to any one of claims 1 to 4, wherein an abnormality in operation is determined. If it is determined that there is an operational abnormality in the determination step,
The vertical shaft according to any one of claims 1 to 4, further comprising an adjusting step of adjusting the flow rate of the gas discharged from the extraction tuyere so that the flow rate is within a predetermined flow rate range. How to operate a carbonization furnace. If it is determined that there is an operational abnormality in the determination step,
The method for operating a vertical carbonization furnace according to claim 5, further comprising the step of adjusting the flow rate of gas discharged from the extraction tuyere so that the difference in temperature within the furnace is less than a predetermined temperature. . A method for producing ferro coke, comprising operating a vertical carbonization furnace using the method for operating a vertical carbonization furnace according to claim 6 to manufacture ferro coke. A method for producing ferro coke, comprising operating a vertical carbonization furnace using the method for operating a vertical carbonization furnace according to claim 7 to manufacture ferro coke. Vertical carbonization furnace equipment for producing ferro coke,
Vertical carbonization furnace,
two or more flow rate sensors that measure the flow rate of gas;
a control device for controlling the vertical carbonization furnace,
The vertical carbonization furnace is
Carbonization furnace main body,
A charging port into which a molded product that is a raw material for ferro coke is charged;
one or more high-temperature tuyeres for blowing high-temperature gas into the carbonization furnace body;
two or more extraction tuyeres that are provided at different positions in the height direction from the high temperature tuyere and discharge gas within the carbonization furnace main body;
It has an outlet for discharging the carbonized molded product,
The two or more extraction tuyeres are provided at different positions in the width direction,
The two or more flow rate sensors are respectively provided at the two or more extraction tuyeres,
The control device includes an acquisition unit that acquires data indicating the flow rate of gas discharged from the extraction tuyere from the flow rate sensor, and a calculation unit that calculates the flow rate of gas discharged from each extraction tuyere from the data. , a determination unit that determines that there is an operational abnormality when the flow rate is outside a predetermined flow rate range. The vertical carbonization furnace equipment according to claim 10, wherein the flow rate sensor is a vibration meter. further comprising a disturbance removal filter;
The vertical carbonization furnace equipment according to claim 11, wherein the disturbance removal filter removes a predetermined frequency component from the vibrations measured by the vibration meter. 13. The frequency component is predetermined by performing a principal component analysis of the frequency component of the vibration that is a disturbance, and evaluating for each frequency the proportion of the principal component whose load amount is equal to or greater than a predetermined value. The vertical carbonization furnace equipment described. It further includes two or more temperature sensors that measure the temperature inside the furnace,
The temperature sensor is provided at two or more different positions in the width direction at the same height in the vertical carbonization furnace,
The acquisition unit acquires the furnace temperature from each temperature sensor, and the determination unit determines that the operation is abnormal when the difference in the furnace temperature acquired from each temperature sensor is greater than or equal to a predetermined temperature difference. The vertical carbonization furnace equipment according to any one of claims 10 to 13, which is determined. From claim 10, when the determination unit determines that the operation is abnormal, the determination unit adjusts the flow rate of the gas discharged from the extraction tuyere so that the flow rate is within a predetermined flow rate range. The vertical carbonization furnace equipment according to claim 13. When the determination unit determines that there is an operational abnormality, the determination unit adjusts the flow rate of the gas discharged from the extraction tuyere so that the difference in temperature within the furnace becomes less than a predetermined temperature. Vertical carbonization furnace equipment according to item 14.

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