Molded coke manufacturing method and molded coke manufacturing device

Abstract

To provide a production method for formed coke that allows the loading of a molded material into a vertical pyrolysis furnace while dispersing the molded material in a depth direction from a loading chute.SOLUTION: A production method for formed coke comprises: when an accumulation layer of a molded material accumulated inside a vertical pyrolysis furnace body reaches a predetermined reference height, loading one batch of the molded material into a vertical pyrolysis furnace from a loading chute inclined and connected to the vertical pyrolysis furnace body; and pyrolyzing the supplied molded material inside the vertical pyrolysis furnace body to produce the formed coke. The method includes measuring the accumulation distribution of the molded material, and adjusting the reference height in a vertical direction based on measurement results of the accumulation distribution.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to a method and an apparatus for producing molded coke by using a vertical carbonization furnace. [Background technology]

[0002] In recent years, in order to improve the reactivity of coke, a technology has been developed in which briquettes such as coal are mixed with a binder or other binding agent, molded into lumps, and then the briquettes are carbonized to produce molded coke, which is then used as a blast furnace feedstock. Among molded cokes, those made by mixing a certain amount of iron-containing material (iron ore, etc.) with briquettes (coal, etc.) and molding them into lumps are called ferrocoke. As a manufacturing method for molded coke, a method of carbonizing the briquettes using a vertical carbonization furnace has generally been proposed.

[0003] A method using a vertical carbonization furnace has been proposed as a method for carbonizing ferro-coke, and for example, Patent Document 1 discloses a method for producing ferro-coke using a vertical carbonization furnace having a carbonization zone in the upper part and a cooling zone in the lower part. This method includes a charging step of charging the molded bodies, which are composed of molded bodies and an iron-containing substance, into the vertical carbonization furnace, a carbonization step of producing ferro-coke by carbonizing the molded bodies by injecting a heated gas into the carbonization zone, a cooling step of cooling the ferro-coke by injecting a cooling gas, an in-furnace gas discharge step of discharging the in-furnace gas from an outlet at the top of the vertical carbonization furnace, and a ferro-coke discharge step of discharging the ferro-coke from the bottom of the cooling zone.

[0004] In the briquette charging process, the briquette is charged into the furnace through a charging chute attached at an angle to the top of the vertical carbonization furnace, and in the carbonization process, the briquette is heated by injecting low-temperature gas into the furnace from a low-temperature gas inlet in the middle of the carbonization zone and high-temperature gas into the furnace from a high-temperature gas inlet in the bottom of the carbonization zone.In addition, in the ferro-coke cooling process, the ferro-coke is cooled by injecting cooling gas into the cooling gas inlet in the bottom of the cooling zone.

[0005] Here, in order to increase the production volume of ferro-coke, it is necessary to increase the volume of the vertical carbonization furnace, but because the heating gas and cooling gas are injected in the depth direction of the vertical carbonization furnace (parallel to the horizontal component of the direction in which the briquettes are charged), the internal dimension in the depth direction must be kept below a certain value in order for the gas to penetrate to the center of the furnace. Therefore, the vertical carbonization furnace has a shape in which the furnace width direction (the direction perpendicular to the depth direction in the cross section of the vertical carbonization furnace) is longer than the depth direction.

[0006] As described above, in a vertical carbonization furnace with a longer furnace width than its depth, it is difficult to install a sufficient number of briquette charging ports relative to the furnace width, even when multiple rows of briquette charging ports are installed in the furnace width direction. When briquette materials are charged into the furnace through limited briquette charging ports, the distribution of the charged briquette materials across the furnace width is uneven, resulting in a peak-like distribution depending on the angle of repose of the briquette materials. This lack of uniformity in the charging distribution can result in localized areas of high charging pressure within the furnace, which can cause cracks in the briquette materials. Furthermore, if areas with a high and low briquette content are generated when the briquette materials are charged into the furnace, the gas flow within the furnace becomes uneven, adversely affecting the carbonization of the briquette materials. To address this issue, Patent Document 2 discloses a method for producing briquette coke by providing a dispersing element that disperses the briquette materials across the furnace width. [Prior art documents] [Patent documents]

[0007] [Patent Document 1] Japanese Patent Application Laid-Open No. 2011-57970 [Patent Document 2] Japanese Patent Application Publication No. 2017-155214 Summary of the Invention [Problem to be solved by the invention]

[0008] However, the dispersing member disclosed in Patent Document 2 focuses on dispersion in the furnace width direction and does not affect the flight distance of the briquettes, so there is a problem in that it cannot improve uniform dispersion in the furnace depth direction. The present invention has been made in consideration of the above circumstances, and an object of the present invention is to provide a molded coke manufacturing method and manufacturing apparatus that, when producing molded coke, a raw material for a blast furnace, particularly ferrocoke, using a vertical carbonization furnace, can charge the raw material molded materials from a charging chute while dispersing them in the depth direction of the vertical carbonization furnace. [Means for solving the problem]

[0009] The means for solving the above problems are as follows. [1] A method for producing molded coke, in which, when the layer of molded materials accumulated inside a vertical carbonization furnace body reaches a predetermined reference height, a batch of the molded materials is charged into the furnace from a charging chute connected at an angle to the vertical carbonization furnace body, and the supplied molded materials are carbonized inside the vertical carbonization furnace body to produce molded coke, and the deposition distribution of the molded materials is measured, and the reference height is changed in the vertical direction depending on the measurement result of the deposition distribution. [2] The method for producing molded coke described in [1], wherein the height of the deposition layer is measured at at least three points as the deposition distribution: the central position of the cross section of the vertical carbonization furnace body; a cross section position closer to the furnace wall position to which the charging chute is connected than the central position of the cross section; and a cross section position farther from the furnace wall position to which the charging chute is connected than the central position of the cross section. [3] A method for producing molded coke described in [2], in which the reference height is changed in the vertical direction when the heights of the deposition layer at the three points are outside a predetermined range, and the reference height is not changed in the vertical direction when the heights of the deposition layer at the three points are within a predetermined range. [4] A method for producing molded coke as described in [3], wherein the reference height is changed downward when the height of the deposited layer at a cross-sectional position close to the oven wall position is higher than the height of the deposited layer at the cross-sectional center position or a cross-sectional position away from the oven wall position, and the reference height is changed upward when the height of the deposited layer at a cross-sectional position close to the oven wall position is lower than the height of the deposited layer at the cross-sectional center position or a cross-sectional position away from the oven wall position. [5] A method for producing molded coke as described in [3], wherein the reference height is changed upward when the height of the deposited layer at a cross-sectional position away from the oven wall position is higher than the height of the deposited layer at the cross-sectional center position or a cross-sectional position close to the oven wall position, and the reference height is changed downward when the height of the deposited layer at a cross-sectional position away from the oven wall position is lower than the height of the deposited layer at the cross-sectional center position or a cross-sectional position close to the oven wall position. [6] A molded coke manufacturing apparatus comprising: a vertical carbonization furnace body that carbonizes molded materials to produce molded coke; a charging chute connected to the vertical carbonization furnace body at an angle and that supplies the molded materials to the vertical carbonization furnace body; an openable and closable gate located midway along the charging chute that temporarily retains the molded materials inside the charging chute; a deposition distribution measuring device that measures the deposition distribution of the molded materials deposited inside the vertical carbonization furnace body; and a gate control device that opens the gate when the deposition layer of the molded materials deposited inside the vertical carbonization furnace body reaches a predetermined reference height, wherein the gate control device changes the reference height in the vertical direction based on the deposition distribution of the molded materials measured by the deposition distribution measuring device. [7] The deposition distribution measuring device measures the height of the deposition layer at at least three points as the deposition distribution: the central position of the cross section of the vertical carbonization furnace body; a cross section position closer to the furnace wall position to which the charging chute is connected than the central position of the cross section; and a cross section position farther from the furnace wall position to which the charging chute is connected than the central position of the cross section. [8] A molded coke manufacturing apparatus as described in [7], wherein when the height of the deposition layer at three points measured by the deposition distribution measuring device is outside a predetermined range, the gate control device changes the reference height in the vertical direction, and when the height of the deposition layer at the three points is outside a predetermined range, the gate control device does not change the reference height in the vertical direction. [9] A molded coke manufacturing apparatus as described in [8], wherein when the height of the deposition layer at a cross-sectional position close to the oven wall position measured by the deposition distribution measuring device is higher than the height of the deposition layer at the cross-sectional center position or a cross-sectional position away from the oven wall position, the gate control device changes the reference height downward, and when the height of the deposition layer at a cross-sectional position close to the oven wall position is lower than the height of the deposition layer at the cross-sectional center position or a cross-sectional position away from the oven wall position, the gate control device changes the reference height upward.

[10] A molded coke manufacturing apparatus as described in [8], wherein when the height of the deposition layer at a cross-sectional position away from the oven wall position measured by the deposition distribution measuring device is higher than the height of the deposition layer at the cross-sectional center position or a cross-sectional position close to the oven wall position, the gate control device changes the reference height upward, and when the height of the deposition layer at a cross-sectional position away from the oven wall position is lower than the height of the deposition layer at the cross-sectional center position or a cross-sectional position close to the oven wall position, the gate control device changes the reference height downward. [Effects of the Invention]

[0010] The method and apparatus for producing molded coke according to the present invention can charge molded materials into a vertical carbonization furnace while distributing the molded materials in the depth direction of the furnace, thereby improving the distribution of the molded materials deposited in the vertical carbonization furnace and making the gas flow in the furnace more uniform, thereby enabling the production of high-quality molded coke with high productivity. [Brief explanation of the drawings]

[0011] [Figure 1]FIG. 1 is a schematic diagram showing a vertical carbonization furnace facility as an example of a molded coke manufacturing apparatus according to this embodiment. [Figure 2] FIG. 2 is a cross-sectional schematic view showing a method of feeding molded materials into the furnace at the top of the vertical carbonization furnace body shown in FIG. [Figure 3] FIG. 3 is a schematic diagram showing an example of the configuration of the gate control device 16. As shown in FIG. [Figure 4] FIG. 4 is a flowchart showing a process for further changing the reference height in the vertical direction. [Figure 5] FIG. 5 is a graph showing the height profile of the molded material pile layer before adjusting the reference height and the height profile of the molded material pile layer after adjusting the reference height. DETAILED DESCRIPTION OF THE INVENTION

[0012] An example of an embodiment of the present invention will be described below, taking as an example a manufacturing process for ferro-coke, a type of molded coke. The accompanying drawings are schematic and may differ from the actual product. The embodiments described below exemplify methods and apparatuses for embodying the technical concept of the present invention, and are not intended to limit the configuration to the following description. In other words, the technical concept of the present invention can be modified in various ways within the technical scope defined by the claims.

[0013] Fig. 1 is a schematic diagram showing a vertical carbonization furnace facility as an example of a molded coke manufacturing apparatus according to the present embodiment. In Fig. 1, the depth direction of the vertical carbonization furnace body (the direction perpendicular to the furnace width direction in the cross section of the vertical carbonization furnace body) is the front.

[0014] First, the configuration of a vertical carbonization furnace facility 50 will be described using Figure 1. The vertical carbonization furnace facility 50 for producing ferro-coke includes a vertical carbonization furnace body 1. Carbonization of briquettes is carried out in a carbonization zone in the upper part of the vertical carbonization furnace body 1, and cooling of the ferro-coke is carried out in a cooling zone in the lower part of the vertical carbonization furnace body 1. A low-temperature gas injection tuyere 8 is provided on the side of the vertical carbonization furnace body 1 at a position corresponding to the middle of the carbonization zone, and a high-temperature gas injection tuyere 9 is provided on the side of the vertical carbonization furnace body 1 at a position corresponding to the lower part of the carbonization zone. Furthermore, a cooling gas blowing tuyere 12 is provided on the side of the vertical carbonization furnace body 1 at a position corresponding to the lower part of the cooling zone, a charging chute 3 for charging shaped materials and an in-furnace gas outlet 14 are provided at the top of the vertical carbonization furnace body 1, and a ferro-coke outlet 13 is provided at the bottom of the vertical carbonization furnace body 1. The outer shell (surface) of the vertical carbonization furnace body 1 is made of an iron shell, and refractory material (not shown) is installed inside the iron shell.

[0015] Briquettes containing coal or other briquettes and iron-containing materials such as iron ore are contained in a briquette charging hopper 2. When producing ferro-coke, the briquettes contained in the briquette charging hopper 2 are charged into the top of the vertical carbonization furnace body 1 through a steel charging chute 3, carbonized in the carbonization zone, and cooled in the cooling zone. The produced ferro-coke is discharged from a ferro-coke discharge port 13 at the bottom. During this process, heated gas for carbonizing the briquettes is blown into the briquettes through a low-temperature gas blowing tuyeres 8 and a high-temperature gas blowing tuyeres 9. A gas with a higher temperature than the gas blown into the low-temperature gas blowing tuyeres 8 is blown into the high-temperature gas blowing tuyeres 9. Cooling gas for cooling the produced ferro-coke is blown into the briquettes through a cooling gas blowing tuyeres 12. The blown gas is discharged from a furnace gas discharge port 14 at the top of the furnace. The charging chute 3 is connected to the vertical carbonization furnace body 1 at an angle. The inclination angle θ of the charging chute 3 with respect to the horizontal direction is an angle (for example, 35 to 80°) equal to or greater than the angle of repose of the briquettes to be charged into the furnace. The briquettes, which are composed of the briquettes and the iron-containing substance, slide down the inner surface of the charging chute 3 and are supplied into the vertical carbonization furnace body 1. When producing briquettes in the vertical carbonization furnace body 1, only the briquettes are supplied into the vertical carbonization furnace body 1.

[0016] The furnace gas discharged from the furnace gas outlet 14 at the top of the furnace is cooled by the first circulating gas cooler 6 and the second circulating gas cooler 7. Thereafter, part of the furnace gas is heated by the low-temperature gas heating device 10 and blown into the furnace from the low-temperature gas blowing tuyere 8, part is heated by the high-temperature gas heating device 11 and blown into the furnace from the high-temperature gas blowing tuyere 9, and the remainder is blown into the furnace from the cooling gas blowing tuyere 12.

[0017] Using the vertical carbonization furnace body 1 having three tuyeres installed at different heights and no gas outlet other than at the furnace top, the briquettes and the briquettes of the iron-containing material are continuously carbonized to produce ferro-coke. Low-temperature gas is blown in from the low-temperature gas blowing tuyeres 8 to adjust the temperature rise rate of the briquettes inside the vertical carbonization furnace body 1. The temperature of the low-temperature gas is preferably about 400 to 700°C. High-temperature gas is blown in from the high-temperature gas blowing tuyeres 9 to raise the temperature of the briquettes inside the vertical carbonization furnace body 1 to the maximum temperature. The temperature of the high-temperature gas is preferably about 800 to 1000°C. Furthermore, cooling gas is blown in from the cooling gas blowing tuyeres 12 to cool the ferro-coke produced by carbonization inside the furnace. The temperature of the cooling gas is preferably about 25 to 80°C.

[0018] Figure 2 is a cross-sectional schematic diagram showing a method for supplying briquettes into the furnace at the top of the vertical carbonization furnace body shown in Figure 1. In Figure 2, reference numeral 1 denotes the vertical carbonization furnace body, 3 denotes a charging chute, 4 denotes a gate, 5 denotes a charge diffusion section, 15 denotes a deposition distribution measuring device that continuously or intermittently measures the deposition distribution of the briquettes deposition layer 19 deposited inside the vertical carbonization furnace body 1, and 16 denotes a gate control device that controls the opening and closing of the gate 4.

[0019] The deposition distribution measuring device 15 has, for example, three distance meters 15a to 15c. The deposition distribution measuring device 15 measures the deposition distribution of the briquette deposition layer 19 using the three distance meters 15a to 15c. The distance meters 15a to 15c are, for example, laser distance meters. The distance meters 15a to 15c are respectively installed at positions in the depth direction of the vertical carbonization furnace body 1 such that L1 = L2 = L3 = L4. That is, the deposition distribution measuring device 15 measures the heights of three points as the deposition distribution of the briquette deposition layer 19: a central position in the cross section of the vertical carbonization furnace body 1; a midpoint between the central position and the furnace wall position to which the charging chute 3 is connected; and a midpoint between the central position and the furnace wall position on the opposite side to which the charging chute 3 is not connected. Note that each of the midpoints and the central position is a position in the cross section of the vertical carbonization furnace body 1. In the following explanation, the "cross section" will be omitted, and the intermediate position between the central position and the furnace wall position to which the charging chute 3 is connected will be referred to as the first intermediate position, and the intermediate position between the central position and the furnace wall position on the opposite side to which the charging chute 3 is not connected will be referred to as the second intermediate position.

[0020] A briquette charging hopper 2 (see Figure 1) is connected to the top of the charging chute 3. The gate 4 is provided midway through the pipe of the charging chute 3, which is connected to the vertical carbonization furnace body 1, and is configured to be openable and closable, and temporarily retains one batch of briquettes, which are the raw material for ferro-coke, inside the charging chute 3. In addition, the charge dispersion section 5 distributes the briquettes charged through the charging chute 3 in the width direction of the charging chute 3.

[0021] When charging briquettes, which are the raw material for ferro-coke, into the vertical carbonization furnace body 1, first, one batch of briquettes, which are the raw material for ferro-coke, is supplied from the briquettes charging hopper 2 to the charging chute 3. When the briquettes are supplied from the briquettes charging hopper 2 to the charging chute 3, the gate 4 provided midway through the pipe of the charging chute 3 is in a closed state.

[0022] Next, a signal from the gate control device 16 opens the gate 4, and the briquettes are supplied into the vertical carbonization furnace body 1 through the charging chute 3. The gate control device 16 receives the measurement results of the height of the briquettes pile layer 19 from the pile distribution measuring device 15. When the briquettes are unloaded due to the production of ferro-coke and the height of the briquettes pile layer 19 decreases to a predetermined reference height, the gate control device 16 outputs a signal to open the gate 4, thereby opening the gate 4. The briquettes pass through the charge diffusion section 5, which promotes dispersion in the furnace width direction, and fall into the vertical carbonization furnace body 1. The height of the briquettes pile layer 19 may be calculated by averaging the heights measured by the three distance meters 15a to 15c. The reference height is set to a height at which the briquettes charged through the charging chute 3 are charged into the center of the vertical carbonization furnace body 1.

[0023] After the briquettes temporarily piled up in the charging chute 3 are supplied to the vertical carbonization furnace body 1, the gate control device 16 outputs a signal to close the gate 4, thereby closing the gate 4. Once the gate 4 is closed, a raw material feed device (not shown) provided at the bottom of the briquettes charging hopper 2 operates, and one batch of briquettes is automatically supplied from the briquettes charging hopper 2 to the charging chute 3.

[0024] When the briquettes are supplied into the vertical carbonization furnace body 1 through the charging chute 3, the landing point of the briquettes changes depending on the height of the briquettes pile layer 19 inside the vertical carbonization furnace body 1 at the time of charging the briquettes. That is, if the height of the briquettes pile layer 19 at the time of charging the briquettes is changed upward, the distance between the briquettes pile layer 19 and the lower end of the connection position of the charging chute 3 with the vertical carbonization furnace body 1 becomes shorter, so the landing point becomes closer to the furnace wall position to which the charging chute 3 is connected in the vertical carbonization furnace body 1. On the other hand, if the height of the briquettes pile layer 19 at the time of charging the briquettes is changed downward, the distance between the briquettes pile layer 19 and the lower end of the connection position of the charging chute 3 with the vertical carbonization furnace body 1 becomes longer, so the landing point becomes farther from the furnace wall position to which the charging chute 3 is connected in the vertical carbonization furnace body 1.

[0025] In this way, by changing the height of the briquette pile 19 in the vertical direction when the briquettes are charged, the landing point of the briquettes charged through the charging chute 3 can be changed to a side closer to the charging chute 3 or a side farther away from the charging chute 3. By utilizing this phenomenon, the method for producing briquette coke according to this embodiment improves the deposition distribution of the briquette pile 19.

[0026] Specifically, if the height of the compact pile 19 is higher on the side closer to the charging chute 3 than on the side farther from the chute, the height of the compact pile 19 at the time of charging the compacts is set lower than the reference height. As a result, the landing point of the compacts is changed to the side farther from the charging chute 3 where the height of the pile of compact pile 19 is lower, and by charging one batch of compacts in this state, the compacts are charged at a position farther from the charging chute 3, and the pile distribution of the compact pile 19 is evened out.

[0027] On the other hand, if the height of the molten material pile 19 is higher on the side away from the charging chute 3 than on the side closer to the charging chute 3, the height of the molten material pile 19 at the time of charging the molten materials is changed to be higher than the reference height. As a result, the landing point of the molten materials is changed to the side closer to the charging chute 3 where the height of the pile of molten material 19 is lower, and by charging one batch of molten materials in this state, the molten materials are charged at a position closer to the charging chute 3, and the pile distribution of the molten material pile 19 is evened out.

[0028] If the briquette pile 19 at the center of the cross section of the vertical carbonization furnace body 1 is high, the height of the briquette pile 19 at the time of charging the briquette may be changed to a height higher than the reference height, or may be changed to a height lower than the reference height. This changes the landing point of the briquette to a side closer to the charging chute 3 where the height of the briquette pile 19 is lower, or to a side farther from the charging chute 3. Therefore, by charging one batch of briquette in this state, the deposition distribution of the briquette pile 19 is evened out.

[0029] In the method for producing molded coke according to this embodiment, the deposition distribution of the molded coke sediment layer 19 is measured by the three distance meters 15a to 15c, and the reference height is changed in the vertical direction depending on the measurement results. This allows the landing point of the molded coke to be changed depending on the measurement results of the distribution of the molded coke sediment layer 19, so that the molded coke can be charged while being dispersed in the depth direction of the vertical carbonization furnace body 1, and the deposition distribution of the molded coke sediment layer 19 can be made uniform.

[0030] It is also preferable to change the reference height when the height of the molding deposit layer 19 measured by the three rangefinders 15a to 15c is outside a predetermined range, and not change the reference height when the measured height of the molding deposit layer 19 is within the predetermined range. The predetermined range is a range within which it is determined that no deposition distribution occurs in the molding deposit layer 19. In this way, changing the reference height even when the height of the molding deposit layer 19 is within the predetermined range and no deposition distribution occurs in the molding deposit layer 19 would undesirably increase the deposition distribution of the molding deposit layer 19.

[0031] Furthermore, in the deposition distribution of the molded material deposition layer 19 measured by the three rangefinders 15a to 15c, if the height of the first intermediate position is higher than the height of the central position or the second intermediate position, the reference height is changed downward. On the other hand, in the deposition distribution of the molded material deposition layer 19, if the height of the first intermediate position is lower than the height of the central position or the second intermediate position, the reference height is changed upward. As a result, the landing point of the molded material deposition layer 19 becomes a position where the height of the molded material deposition layer 19 is low, and by charging the molded material at that position, the deposition distribution of the molded material deposition layer 19 is leveled.

[0032] Similarly, if the height of the second intermediate position in the deposition distribution of the briquette sediment layer 19 measured by the three rangefinders 15a to 15c is higher than the height of the central position or the first intermediate position, the reference height is changed upward. On the other hand, if the height of the second intermediate position in the deposition distribution of the briquette sediment layer 19 is lower than the height of the central position or the first intermediate position, the reference height is changed downward. As a result, the landing point of the briquette is at a lower height position in the briquette sediment layer 19, and by charging the briquette at that position, the deposition distribution of the briquette sediment layer 19 is leveled. In this way, by changing the reference height vertically, the briquette can be charged from the charging chute 3 while being dispersed in the depth direction of the vertical carbonization furnace body 1, thereby improving the deposition distribution of the briquette sediment layer 19.

[0033] Next, the processing of the gate control device 16 will be described. FIG. 3 is a schematic diagram showing an example of the configuration of the gate control device 16. The gate control device 16 is, for example, a general-purpose computer such as a workstation or a personal computer. The gate control device 16 includes a control unit 20, an input unit 21, an output unit 22, and a memory unit 23. The control unit 20 is, for example, a CPU, and executes a program read from the memory unit 23 to cause the control unit 20 to function as an acquisition unit 25, a reference height adjustment unit 26, and a gate opening / closing unit 27. The input unit 21 is, for example, a keyboard or a touch panel integrated with a display. The output unit 22 is, for example, an LCD or CRT display. The memory unit 23 is, for example, an updatable flash memory, a built-in hard disk or a hard disk connected via a data communication terminal, an information recording medium such as a memory card, and a read / write device for the same. The memory unit 23 stores programs for the control unit 20 to execute each function, data used by the programs, and the like.

[0034] The acquisition unit 25 acquires the measurement results of the height of the molded product deposit layer 19 from the deposit distribution measuring device 15. The deposit distribution measuring device 15 has three rangefinders 15a to 15c. The acquisition unit 25 acquires height data of the molded product deposit layer 19 at a first intermediate position, a central position, and a second intermediate position from the three rangefinders 15a to 15c as the deposit distribution of the molded product. The acquisition unit 25 outputs the acquired height data of the molded product deposit layer 19 to the reference height adjustment unit 26 and the gate opening / closing unit 27.

[0035] The reference height adjustment unit 26 changes the reference height based on the acquired height data of the molding deposition layer 19. The reference height adjustment unit 26 compares the height data of the first intermediate position, the central position, and the second intermediate position acquired from 15a to 15c and determines whether these are within a predetermined range. If the reference height adjustment unit 26 determines that the height data acquired from 15a to 15c is within the predetermined range, it outputs the reference height to the gate opening / closing unit 27 without changing the reference height.

[0036] On the other hand, when it is determined that the height data of the molded material deposition layer 19 acquired from 15a to 15c is outside the predetermined range and the height of the first intermediate position acquired from 15a is higher than the height of the central position or the second intermediate position acquired from 15b and 15c, the reference height adjustment unit 26 outputs the reference height obtained by changing the reference height M downward to the gate opening / closing unit 27. Furthermore, when it is determined that the height data of the molded material deposition layer 19 acquired from 15a to 15c is outside the predetermined range and the height of the first intermediate position acquired from 15a is lower than the height of the central position or the second intermediate position acquired from 15b and 15c, the reference height adjustment unit 26 outputs the reference height obtained by changing the reference height upward to the gate opening / closing unit 27.

[0037] When the gate opening / closing unit 27 acquires the measurement results of the height of the molded material pile layer 19 from the acquisition unit 25, it calculates the average value. The gate opening / closing unit 27 compares the calculated average value with the reference height acquired from the reference height adjustment unit 26, and outputs a signal to gate 4 to open the gate when the calculated average value becomes lower than the reference height due to unloading. This opens gate 4, and one batch of molded material is charged into the vertical carbonization furnace body 1. After a predetermined time has elapsed since the gate opening signal was output to the gate, the gate opening / closing unit 27 outputs a signal to gate 4 to close gate 4. This closes gate 4. Then, one batch of molded material is supplied from the molded material charging hopper 2, and is retained inside the charging chute 3 by gate 4.

[0038] The reference height adjustment unit 26 determines the reference height for charging one batch of molded products, for example, at the time when the gate is closed by the gate opening / closing unit 27. In this case, the reference height adjustment unit 26 also receives a signal to close the gate from the gate opening / closing unit 27, and at the time when the signal is received, the reference height adjustment unit 26 determines whether or not to change the reference height in the vertical direction.

[0039] In this way, one batch of briquettes can be charged into the vertical carbonization furnace body while changing the reference height in the vertical direction according to the measurement results of the deposition distribution of the briquettes sediment layer 19 through the processing of the acquisition unit 25, the reference height adjustment unit 26, and the gate opening / closing unit 27. This allows the briquettes to be charged from the charging chute 3 while being dispersed in the depth direction of the vertical carbonization furnace body 1, which results in an improved deposition distribution of the briquettes sediment layer 19 and a more uniform gas flow in the furnace, making it possible to produce high-quality briquettes with high productivity.

[0040] 1 and 2, the deposition distribution measuring device 15 has three distance meters 15a to 15c installed at positions where L1 = L2 = L3 = L4 is satisfied, but the present invention is not limited to this. The deposition distribution measuring device 15 only needs to have distance meters that can measure the height of at least three points: the center position of the cross section of the vertical carbonization furnace body; a position closer to the furnace wall position to which the charging chute 3 is connected than the center position of the cross section; and a position farther from the furnace wall position to which the charging chute 3 is connected than the center position of the cross section. However, in consideration of uniform distribution of the molded product deposition layer 19, it is preferable to install the three distance meters 15a to 15c at positions where L1 = L2 = L3 = L4 is satisfied.

[0041] 1 to 3, the reference height adjustment unit 26 changes the reference height upward or downward, but this is not limiting. For example, if the deposition distribution of the molding deposition layer 19 is still large even after changing the reference height, the reference height adjustment unit 26 may further change the reference height in the vertical direction.

[0042] Fig. 4 is a flow diagram showing a process for further changing the reference height in the vertical direction. In Fig. 4 and the description of Fig. 4, the height of the molded material pile layer 19 acquired from the range finder 15a is set to "01", the height of the molded material pile layer 19 acquired from the range finder 15b is set to "02", and the height of the molded material pile layer 19 acquired from the range finder 15c is set to "03". The flow of Fig. 4 is started, for example, when the charging of molded materials into the vertical carbonization furnace body 1 is started. First, the reference height adjustment unit 26 determines whether the pile surface heights acquired from the three range finders 15a to 15c are within a predetermined range (step S101).

[0043] If the deposition surface heights acquired from the three rangefinders 15a to 15c are within a predetermined range (step S101: Yes), the reference height adjustment unit 26 outputs the reference height to the gate opening / closing unit 27. Thereafter, when the molded product deposition layer 19 is unloaded and drops to the reference height (step S102), the gate opening / closing unit 27 outputs a signal to open the gate 4 to load one batch of molded products (step S103). Thereafter, the gate opening / closing unit 27 outputs a signal to close the gate 4, and the process returns to step S101.

[0044] On the other hand, if the deposition surface heights acquired from the three rangefinders 15a to 15c are outside the predetermined range (step S101: No), the reference height adjustment unit 26 determines whether O1 is higher than O2 and O3 (step S104). If O1 is higher than O2 and O3 (step S104: Yes), the reference height adjustment unit 26 sets n = 1 (n = 0 + 1) (step S105) and outputs a reference height obtained by lowering the reference height by 1 × X mm to the gate opening / closing unit 27 to lower the reference height (step S106). Thereafter, when the molded product deposition layer 19 is unloaded and lowered to the reference height lowered by 1 × X mm (step S107), the gate opening / closing unit 27 outputs a signal to open gate 4 to load one batch of molded products (step S108). The gate opening / closing unit 27 outputs a signal to close gate 4, and the process proceeds to step S109.

[0045] The reference height adjusting unit 26 determines whether the pile surface heights acquired from the three range finders 15a to 15c are within a predetermined range (step S109). If the pile surface heights acquired from the three range finders 15a to 15c are within the predetermined range (step S109: Yes), the reference height adjusting unit 26 resets the value of n to 0 (step S110) and proceeds to step S102.

[0046] If the deposition surface heights acquired from the three rangefinders 15a to 15c are outside the predetermined range (step S109: No), the reference height adjustment unit 26 determines whether O1 is higher than O2 and O3 (step S111). If O1 is higher than O2 and O3 (step S111: Yes), the reference height adjustment unit 26 sets n=2 (n=1+1) (step S105), outputs a reference height obtained by lowering the reference height by 2×X mm to the gate opening / closing unit 27, and further lowers the reference height (step S106). Thereafter, when the molded product deposition layer 19 is unloaded and lowered to the reference height lowered by 2×X mm (step S107), the gate opening / closing unit 27 outputs a signal to open the gate 4 to load one batch of molded products (step S108). The gate opening / closing unit 27 outputs a signal to close the gate 4, and the process proceeds to step S109, where the subsequent processes are repeated.

[0047] Furthermore, in step S104, if O1 is not higher than O2 and O3 (step S104: No), the reference height adjustment unit 26 sets k=1 (k=0+1) (step S113) and outputs a reference height that increases the reference height by 1×Y mm to the gate opening / closing unit 27 to raise the reference height (step S114). Thereafter, when the molded product deposition layer 19 is unloaded and descends to the reference height increased by 1×Y mm (step S115), the gate opening / closing unit 27 outputs a signal to open gate 4 and loads one batch of molded products (step S116). The gate opening / closing unit 27 outputs a signal to close gate 4, and the process proceeds to step S117.

[0048] The reference height adjusting unit 26 determines whether the pile surface heights acquired from the three range finders 15a to 15c are within a predetermined range (step S117). If the pile surface heights acquired from the three range finders 15a to 15c are within the predetermined range (step S109: Yes), the reference height adjusting unit 26 resets the value of k to 0 (step S110) and proceeds to step S102.

[0049] If the deposition surface heights acquired from the three rangefinders 15a to 15c are outside the predetermined range (step S117: No), the reference height adjustment unit 26 determines whether O1 is higher than O2 and O3 (step S118). If O1 is not higher than O2 and O3 (step S111: No), the reference height adjustment unit 26 sets k to 2 (k = 1 + 1) (step S113) and outputs a reference height that is 2 × Y mm higher to the gate opening / closing unit 27 to further raise the reference height (step S114). Thereafter, when the molded product deposition layer 19 is unloaded and lowered to the reference height increased by 2 × Y mm (step S115), the gate opening / closing unit 27 outputs a signal to open gate 4 and loads one batch of molded products (step S116). The gate opening / closing unit 27 outputs a signal to close gate 4, and the process proceeds to step S117, where the subsequent processes are repeated.

[0050] In step S111, if 01 is not higher than 02 and 03 (step S111: No), the reference height adjustment unit 26 resets the value of n to 0 (step S112), proceeds to step S113, and repeats the processes from step S113 onwards. Also, in step S118, if it is determined that 01 is higher than 02 and 03 (step S118: Yes), the reference height adjustment unit 26 resets the value of k to 0 (step S119), proceeds to step S105, and repeats the processes from step S105 onwards.

[0051] Note that after opening gate 4 and loading one batch of molded products in steps S103, S108, and S116, there may be a step of determining whether an instruction to end the process shown in Fig. 4 has been input. If reference height adjustment unit 26 determines in this step that an instruction to end this process has been input, this process ends. On the other hand, if it determines that an instruction to end this process has not been input, the process proceeds to step S103, step S108, or step S116.

[0052] If the distribution of the molded material deposition layer 19 does not improve even after changing the reference height, the reference height adjustment unit 26 may further change the reference height in the vertical direction, thereby quickly leveling the distribution of the molded material deposition surface.

[0053] In the molded product manufacturing apparatus and method according to the present embodiment, an example has been shown in which a batch of molded products is charged when the molded product stack layer 19 has reached the reference height, but this is not limiting. The next batch of molded products may be charged after a predetermined time has elapsed since the previous batch was charged. In this case, the reference height adjustment unit 26 changes the length of the predetermined time instead of changing the reference height vertically.

[0054] For example, if the predetermined time is shortened, the next batch of briquettes will be charged when the briquettes pile layer 19 is high, and the landing point will be closer to the furnace wall to which the charging chute 3 is connected. On the other hand, if the predetermined time is lengthened, the next batch of briquettes will be charged when the briquettes pile layer 19 is high, and the landing point will be farther from the furnace wall to which the charging chute 3 is connected. In this way, by changing the length of the predetermined time, the landing point of one batch of briquettes can be changed to be closer to or farther from the charging chute 3. Therefore, by changing the length of the predetermined time, just as with changing the reference height in the vertical direction, the briquettes can be charged from the charging chute 3 while being dispersed in the depth direction of the vertical carbonization furnace body 1. [Example]

[0055] In this example, 1 ton of briquettes per batch was charged into the vertical carbonization furnace body 1 shown in Fig. 2, and the height of the briquettes pile layer was measured using three distance meters 15a to 15c.

[0056] Fig. 5 is a graph showing the average value of the height of the molded material sediment layer. The horizontal axis of Fig. 5 represents the depth dimension (mm) of the vertical dry distillation furnace, and the vertical axis represents the height (mm) of the molded material sediment layer. The solid line in Fig. 5 represents the average value of the deposition distribution of the molded material sediment layer (Example of the Invention) formed by charging molded materials while changing the reference height in the vertical direction according to the measurement results of the deposition distribution of the molded material sediment layer. The dashed line in Fig. 5 represents the average value of the deposition distribution of the molded material sediment layer formed by charging molded materials without adjusting the reference height (Comparative Example).

[0057] In the invention example, when the difference in height of the compact pile measured by the range finders 15a to 15c was less than 200 mm, it was determined that there was no difference in the pile distribution of the compact pile, and the compacts were charged without changing the reference height. On the other hand, when the height of the compact pile measured by the range finder 15a was 200 mm or more higher than the height of the compact pile measured by the range finders 15b and 15c, the reference height was lowered by 300 mm and the next compact was charged. Furthermore, when the height of the compact pile measured by the range finder 15a was 200 mm or more lower than the height of the compact pile measured by the range finders 15b and 15c, the reference height was raised by 300 mm and the next compact was charged. The reference height was a position 14,000 mm from the distance meters 15a to 15c, and when the average height of the distance meters 15a to 15c fell below the reference height due to unloading, one batch of briquettes was charged into the vertical carbonization furnace body 1. In the comparative example, as described above, the briquettes were charged into the vertical carbonization furnace body 1 without changing the reference height.

[0058] As shown in Fig. 5, the deposition distribution of the molded material deposition layer in the example was gentler than that in the comparative example. This result confirmed that by changing the reference height in the vertical direction according to the measurement results of the deposition distribution of the molded material deposition layer, it was possible to charge the molded material while dispersing it in the depth direction of the vertical carbonization furnace body 1. [Explanation of symbols]

[0059] 1 Vertical carbonization furnace body 2. Molded material charging hopper 3 Charging chute 4 Gates 5 Charge diffusion section 6. First circulating gas cooling device 7 Second circulating gas cooling device 8 Low-temperature gas injection tuyere 9 Hot gas injection tuyere 10 Low-temperature gas heating device 11 High-temperature gas heating device 12 Cooling gas injection tuyere 13 Ferro coke outlet 14 Furnace gas exhaust port 15 Sediment distribution measuring device 15a~15c distance meter 16 Gate control device 19 Molded product deposit layer 20 Control Unit 21 Input section 22 Output section 23 Memory section 25 Acquisition Department 26 Reference height adjustment unit 27 Gate opening and closing section

Claims

1. A method for producing molded coke, comprising the steps of: when a layer of molded materials accumulated inside a vertical carbonization furnace body reaches a predetermined reference height, charging one batch of the molded materials into the furnace from a charging chute connected at an angle to the vertical carbonization furnace body; and carbonizing the supplied molded materials inside the vertical carbonization furnace body to produce molded coke; As the deposition distribution of the molded material, the heights of the deposition layer are measured at at least three points, namely, a cross-sectional center position of the vertical carbonization furnace body, a cross-sectional position closer to the furnace wall position to which the charging chute is connected than the cross-sectional center position, and a cross-sectional position farther from the furnace wall position to which the charging chute is connected than the cross-sectional center position; When the heights of the deposition layer at the three points are outside a predetermined range, the reference height is changed in the vertical direction, and when the heights of the deposition layer at the three points are within a predetermined range, the reference height is not changed in the vertical direction; When the height of the deposited layer at a cross-sectional position close to the furnace wall position is higher than the height of the deposited layer at the cross-sectional center position or a cross-sectional position distant from the furnace wall position, the reference height is changed downward, and the height of the deposited layer at a cross-sectional position close to the furnace wall position is lower than the height of the deposited layer at the cross-sectional center position or a cross-sectional position distant from the furnace wall position. In this case, the reference height is changed upward.

2. A method for producing molded coke, comprising the steps of: when a layer of molded materials accumulated inside a vertical carbonization furnace body reaches a predetermined reference height, charging one batch of the molded materials into the furnace from a charging chute connected at an angle to the vertical carbonization furnace body; and carbonizing the supplied molded materials inside the vertical carbonization furnace body to produce molded coke, As the deposition distribution of the molded material, the heights of the deposition layer are measured at at least three points, namely, a cross-sectional center position of the vertical carbonization furnace body, a cross-sectional position closer to the furnace wall position to which the charging chute is connected than the cross-sectional center position, and a cross-sectional position farther from the furnace wall position to which the charging chute is connected than the cross-sectional center position; When the heights of the deposition layer at the three points are outside a predetermined range, the reference height is changed in the vertical direction, and when the heights of the deposition layer at the three points are within a predetermined range, the reference height is not changed in the vertical direction; a method for producing molded coke, wherein the reference height is changed upward when the height of the deposited layer at a cross-sectional position away from the oven wall position is higher than the height of the deposited layer at the cross-sectional center position or a cross-sectional position close to the oven wall position, and the reference height is changed downward when the height of the deposited layer at the cross-sectional position away from the oven wall position is lower than the height of the deposited layer at the cross-sectional center position or a cross-sectional position close to the oven wall position.

3. A vertical carbonization furnace body for producing molded coke by carbonizing the molded material; a charging chute connected to the vertical carbonization furnace body at an angle and configured to supply the molded material to the vertical carbonization furnace body; an openable and closable gate disposed in the charging chute to temporarily retain the moldings inside the charging chute; a deposition distribution measuring device for measuring the deposition distribution of the molded products deposited inside the vertical carbonization furnace body; a gate control device that opens the gate when the accumulation layer of molded materials accumulated inside the vertical carbonization furnace body reaches a predetermined reference height; A molded coke manufacturing apparatus having the deposition distribution measuring device measures, as the deposition distribution, heights of the deposition layer at at least three points: a cross-sectional center position of the vertical carbonization furnace body; a cross-sectional position closer to a furnace wall position to which the charging chute is connected than the cross-sectional center position; and a cross-sectional position farther from a furnace wall position to which the charging chute is connected than the cross-sectional center position; When the heights of the deposited layer at the three measured points are outside a predetermined range, the gate control device changes the reference height in the vertical direction, and when the heights of the deposited layer at the three measured points are outside a predetermined range, the gate control device does not change the reference height in the vertical direction; a gate control device that changes the reference height downward when the measured height of the deposited layer at a cross-sectional position close to the oven wall position is higher than the height of the deposited layer at the cross-sectional center position or a cross-sectional position away from the oven wall position, and that changes the reference height upward when the height of the deposited layer at a cross-sectional position close to the oven wall position is lower than the height of the deposited layer at the cross-sectional center position or a cross-sectional position away from the oven wall position.

4. A vertical carbonization furnace body for producing molded coke by carbonizing the molded material; a charging chute connected to the vertical carbonization furnace body at an angle and configured to supply the molded material to the vertical carbonization furnace body; an openable and closable gate disposed in the charging chute to temporarily retain the moldings inside the charging chute; a deposition distribution measuring device for measuring the deposition distribution of the molded products deposited inside the vertical carbonization furnace body; a gate control device that opens the gate when the accumulation layer of molded materials accumulated inside the vertical carbonization furnace body reaches a predetermined reference height; A molded coke manufacturing apparatus having the deposition distribution measuring device measures, as the deposition distribution, heights of the deposition layer at at least three points: a cross-sectional center position of the vertical carbonization furnace body; a cross-sectional position closer to a furnace wall position to which the charging chute is connected than the cross-sectional center position; and a cross-sectional position farther from a furnace wall position to which the charging chute is connected than the cross-sectional center position; When the heights of the deposited layer at the three measured points are outside a predetermined range, the gate control device changes the reference height in the vertical direction, and when the heights of the deposited layer at the three measured points are outside a predetermined range, the gate control device does not change the reference height in the vertical direction; When the measured height of the deposited layer at a cross-sectional position away from the oven wall position is higher than the height of the deposited layer at the cross-sectional center position or a cross-sectional position close to the oven wall position, the gate control device changes the reference height upward, and when the height of the deposited layer at a cross-sectional position away from the oven wall position is lower than the height of the deposited layer at the cross-sectional center position or a cross-sectional position close to the oven wall position, the gate control device changes the reference height downward.

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