JP2014210863A - Apparatus and method for adjusting oven internal pressure of coke oven carbonization chamber - Google Patents

Abstract

PROBLEM TO BE SOLVED: To stably suppress the fluctuation of oven internal pressure over a whole carbonization period.SOLUTION: An oven internal pressure adjusting apparatus for controlling oven internal pressure of a coke oven carbonization chamber includes: a supply part which supplies a pressure fluid through a nozzle device into a connecting pipe connecting a riser pipe of the coke oven carbonization chamber and a dry main to each other; an oven internal pressure control damper which is arranged inside the connecting pipe; and a control part which suppresses the fluctuation of the oven internal pressure by controlling the drive of the supply part and the oven internal pressure control damper. The control part executes a first control mode for supplying a high-pressure fluid by the supply part in an initial carbonization stage where the amount of carbonization gas released from coal is larger than a predetermined value, and executes a second control mode for adjusting the opening degree of the oven internal pressure control damper while supplying a low-pressure fluid by the supply part, in a stage after the initial carbonization stage, where the amount of the carbonization gas released from coal is equal to or smaller than the predetermined value.

Description

  The coke oven has a structure in which a carbonization chamber in which coal is charged and carbonized and carbonized, and a combustion chamber in which combustion gas is combusted to supply heat necessary for coal carbonization are alternately connected. Refractory bricks such as silica bricks form a partition between the carbonization chamber and the combustion chamber, and the heat of combustion generated in the combustion chamber transfers heat to the coal in the carbonization chamber for dry distillation. Is what you do. A coal charging hole is formed in the upper part of the carbonization chamber, and a cover having a refractory brick on the inner side is formed on both sides of the side wall. When the coal is carbonized into coke, The lid is opened, and the coke in the carbonization chamber is pushed out to the opposite guide wheel side by an extruder.

  During the dry distillation of coal, the volatile components of the coal are generated as dry distillation gas. The dry distillation gas is collected in the dry main via the riser at the top of the carbonization chamber and sent to the dry distillation gas storage facility. As described above, when the pressure of the carbonization chamber rises due to the gas generated during the carbonization and dry distillation of coal, there is a possibility that the dry distillation gas leaks out of the furnace through the coal charging hole or the gap between the lids of the carbonization chamber. In addition, when the refractory brick partitions are cut off due to secular changes in the coke oven, dust or the like flows from the carbonization chamber side to the combustion chamber side, and black smoke enters the exhaust gas in the combustion chamber. Arise.

  Therefore, in Patent Document 1, in the total carbonization period from charging to extrusion, the coke oven internal pressure is set to atmospheric pressure or lower, the measured pressure is compared with the same set pressure, and the control signal generated by the same differential pressure, A pressure control operation method for a coke oven carbonization chamber has been proposed in which a control damper provided in the riser is opened and closed, a pressurized fluid is blown into the riser, or the suction pressure in the riser is adjusted by a combination of two methods.

JP-A-6-41537

  However, in the above-described configuration, it cannot be said that the furnace pressure fluctuation can be stably suppressed over the entire carbonization period. Then, this invention aims at suppressing the furnace pressure fluctuation | variation stably over the whole carbonization period.

  In order to solve the above-mentioned problems, an in-furnace pressure adjusting device according to the present invention is: (1) In the in-furnace pressure adjusting device for controlling the in-furnace pressure of the coke oven carbonizing chamber, the riser pipe of the coke oven carbonizing chamber and the dry main are connected Controlling the drive of the supply section for supplying the pressure fluid to the inside of the connecting pipe through the nozzle device, the furnace pressure adjusting damper disposed inside the connecting pipe, and the supply section and the furnace pressure adjusting damper. And a controller that suppresses fluctuations in the furnace pressure, wherein the controller supplies a high-pressure fluid from the supply unit at the initial stage of dry distillation in which the amount of dry distillation gas released from coal is higher than a predetermined value. In the first control mode, after the initial stage of dry distillation in which the amount of dry distillation gas released from coal is equal to or less than a predetermined value, the low pressure fluid is supplied from the supply unit and the furnace pressure adjustment damper is opened. Which comprises carrying out the second control mode for adjusting the.

(2) In the first control mode, the control unit changes the pressure level of the high-pressure fluid in accordance with the operation state of the coal charging vehicle, and the operation of the coal charging vehicle in the second control mode. The pressure control apparatus according to (1), wherein the pressure fluid is switched from the high pressure fluid to the low pressure fluid according to a state, and the opening degree of the furnace pressure adjustment damper is lowered stepwise.
According to the configuration of (2), since the first control mode is implemented, it becomes unnecessary to consider a detection error due to clogging of the pressure sensor, so that the furnace pressure fluctuation in the carbonization chamber can be stably stabilized for a long period of time. Can be suppressed. In addition, by performing the second control mode, it is possible to easily follow minute fluctuations in the furnace pressure.

  (3) Furthermore, it has a memory | storage part which matches and memorize | stores the pressure level of the said high pressure fluid according to the kind of operation signal output according to the operation state of the said coal charging vehicle, The said control part is the said operation | movement. (2) The pressure level of the high-pressure fluid supplied from the supply unit is set by reading out the pressure level corresponding to the operation signal from the storage unit when receiving the signal. In-furnace pressure regulator. According to the structure of (3), the furnace pressure fluctuation | variation in a carbonization chamber can be more stably suppressed for a long period of time more reliably using the information described in the memory | storage part.

(4) The operation signal includes a first operation signal indicating that the coal cutting device of the coal charging vehicle has started rotating, and a second indicating that the coal cutting device has stopped rotating. , A third operation signal indicating that the charging lid of the coke oven carbonization chamber has been closed by the coal charging vehicle, and sealing processing around the charging lid is completed by the coal charging vehicle A fourth operation signal indicating that the control unit is configured to supply the high-pressure fluid having the first pressure value when the control unit receives the first operation signal. Control
When the second operation signal is received, the supply unit is controlled so that the high pressure fluid having a second pressure value lower than the first pressure value is supplied, and the third operation signal is When receiving, the supply unit is controlled so that the high-pressure fluid having a third pressure value lower than the second pressure value is supplied, and when the fourth operation signal is received, The in-furnace pressure adjusting device according to (3), wherein the supply unit is controlled so that the low-pressure fluid having a fourth pressure value lower than a pressure value of 3 is supplied. According to the structure of (4), the pressure fluid of a suitable pressure level can be supplied at a suitable timing.

  (5) The supply unit is connected to a main supply pipe that supplies pressure fluid to the nozzle device, and a junction formed at a start end of the main supply pipe, and high-pressure fluid supply that supplies the high-pressure fluid A pipe, a low-pressure fluid supply pipe that is connected to the junction and supplies the low-pressure fluid, and is provided in the junction and rotates between the high-pressure fluid supply pipe and the low-pressure fluid supply pipe. And a switching valve having a valve body for changing the supply path, and the valve body rotates when the supply path is rotated in the direction of changing from the high-pressure fluid supply pipe to the low-pressure fluid supply pipe. The pressure in the furnace according to any one of (1) to (4), which also serves as a pressure adjusting member that lowers the pressure level of the high-pressure fluid by increasing the resistance given to the high-pressure fluid according to Adjustment device. According to the configuration of (5), the pressure level of the pressure fluid can be changed in multiple stages simply by rotating the switching valve. In order to obtain a desired pressure fluid, it is not necessary to provide a large number of pressure fluid supply units independently, so that the equipment layout is simplified and the cost can be reduced.

  (6) In order to solve the above-mentioned problem, a furnace pressure adjusting method according to the present invention is a method for adjusting a furnace pressure in a coke oven carbonization chamber in which a furnace pressure adjusting damper is disposed inside a connecting pipe connecting a rising pipe and a dry main. In the initial stage of dry distillation in which the amount of dry distillation gas released from coal is higher than a predetermined value, a first step of supplying a high-pressure fluid into the connecting pipe, and the amount of dry distillation gas released from coal is a predetermined value. And a second step of adjusting the opening of the furnace pressure adjusting damper while supplying a low pressure fluid into the connecting pipe after the initial stage of dry distillation.

  (7) In the first step, the pressure level of the high-pressure fluid is changed according to the operating state of the coal charging vehicle, and in the second step, the opening degree of the furnace pressure adjusting damper is gradually reduced. (6) The furnace pressure adjusting method according to (6). According to the configuration of (7), it is not necessary to consider the detection error due to the clogging of the pressure sensor by performing the first step, and thus the furnace pressure fluctuation in the carbonization chamber is stably suppressed for a long period of time. can do. Further, by performing the second step, it is possible to easily follow minute fluctuations in the furnace pressure.

  According to the present invention, it is possible to stably suppress the furnace pressure fluctuation over the entire carbonization period.

It is a schematic block diagram of coke manufacturing equipment. It is another schematic block diagram of the coke manufacturing equipment containing a furnace pressure adjusting device. It is a schematic block diagram of a charging vehicle. It is a functional block diagram of a charging vehicle. It is operation | movement explanatory drawing of a switching valve. It is a data table which shows the various information memorize | stored in a memory | storage part. It is the flowchart which showed the process which a system controller performs at the time of pressure adjustment.

  FIG. 1 is a schematic configuration diagram of a coke production facility. FIG. 2 is another schematic configuration diagram of the coke production facility including the furnace pressure adjusting device. Referring to these drawings, the coke production facility includes a charging vehicle 10, an extruder 20, and a guide vehicle 30. The charging vehicle 10 moves on the rail rail formed on the charging lid of the coke oven 1 and charges coal into the carbonizing chamber 1 </ b> A of the coke oven 1. The extruder 20 extrudes dry-heated red hot coke from the carbonization chamber 1 </ b> A of the coke oven 1. The guide wheel 30 puts the red hot coke pushed out from the carbonization chamber of the coke oven 1 into the bucket. The bucket containing red hot coke is transported to the fire extinguishing facility 40 by a digestion train.

The furnace pressure adjusting device controls the furnace pressure in the coking chamber 1 </ b> A of the coke oven 1. A rising pipe 2 extending in the vertical direction is connected to the upper wall portion of the carbonizing chamber 1A. The dry distillation gas released from the coal during the dry distillation of the coal is discharged from the riser 2 to the outside of the carbonization chamber 1A. The ascending pipe 2 is connected to the dry main 4 via a connecting pipe 3 bent in an L shape. The dry mains 4 extend in the direction in which the carbonization chambers 1A are arranged, and transfer the dry distillation gas discharged from the carbonization chambers 1A to a dry distillation gas storage facility (not shown).

  A nozzle device 5 extends inside the connecting pipe 3. The nozzle device 5 jets a pressure fluid (generally, it is possible to use water that contains a small amount of ammonia in the water) to the inside of the connecting pipe 3 to lower the furnace pressure of the carbonizing chamber 1A by the ejector effect. The main supply pipe 201 is connected to the nozzle device 5. At the start end of the main supply pipe 201, a merging section 201a where the high-pressure fluid supply pipe 202 and the low-pressure fluid supply pipe 203 merge is provided. A switching valve 7 is provided in the merging portion 201a. The switching valve 7 changes the pressure level of the pressure fluid supplied to the main supply pipe 201 by adjusting the opening degree by the valve drive motor 108. Details of the switching valve 7 will be described later.

  A high-pressure fluid supply unit 8 for supplying a high-pressure fluid is provided at the start end of the high-pressure fluid supply pipe 202, and a low-pressure fluid supply for supplying a low-pressure fluid is provided at the start end of the low-pressure fluid supply pipe 203. Part 9 is provided. A furnace pressure adjusting damper 6 is further provided inside the connecting pipe 3. The furnace pressure adjusting damper 6 suppresses minute furnace pressure fluctuations in the coking chamber 1 </ b> A by adjusting the opening degree by the damper drive motor 107.

  The storage unit 60 stores a sequence program for controlling the furnace pressure adjusting device and various information necessary for executing the sequence program. The various information includes correspondence information in which the pressure suppression level by the furnace pressure suppression unit including the nozzle device 5 and the operation signal output from the charging vehicle 10 are associated with each other, which will be described in detail later. The storage unit 60 may be realized by one storage device or a plurality of storage devices.

  The system controller 50 controls the entire furnace pressure adjusting device, reads the pressure suppression level corresponding to the operation signal output from the loading vehicle 10 from the storage unit 60, and switches to an opening corresponding to the pressure suppression level. The valve drive motor 108 is driven so that the valve 7 is set. Further, the system controller 50 controls driving of the damper drive motor 107, the high pressure fluid supply unit 8 and the low pressure fluid supply unit 9. The system controller 50 may be a single processor or a multiprocessor including a plurality of CPUs. For example, the CPU that controls the damper drive motor 107 and the CPU that controls the valve drive motor 108 may be different. The system controller 50 has an internal timer 51 mounted.

  A correspondence relationship between the invention-specific matters described in claim 1 and the hardware configuration of the present embodiment will be described. The “supply section” is realized by the cooperation of the nozzle device 5, the switching valve 7, the high pressure fluid supply section 8, the low pressure fluid supply section 9, the main supply pipe 201, the high pressure fluid supply pipe 202 and the low pressure fluid supply pipe 203. The The “control unit” is realized by the cooperation of the damper drive motor 107, the valve drive motor 108, and the system controller 50.

  FIG. 3 is a schematic configuration diagram of the charging vehicle. FIG. 4 is a functional block diagram of the charging vehicle. Next, the configuration of the charging vehicle 10 will be described in detail with reference to FIGS. 3 and 4. The charging vehicle 10 includes a charging vehicle controller 101, a port 102, a screw drive motor 103, a sleeve drive motor 104, a gate drive motor 105, a lid removing device drive motor 106, a magnetizing power source 110, and a control. A valve drive motor 111, a coal receiving hopper 11, a screw feeder (corresponding to a coal cutting device) 13, a sleeve 14, a gate 15, a lid removing device 17, a magnet unit 16, and a mortar control valve 18 including.

  As shown in FIG. 3, the coal receiving hopper 11 is formed in a tapered shape whose inner diameter gradually decreases downward, and receives coal 12 stored in a coal tower (not shown). The screw drive motor 103 rotates the screw feeder 13 based on the operation signal output from the loading vehicle controller 101. As the screw feeder 13 rotates, the coal 12 that has been received is cut out by a predetermined amount.

  Here, when the loading vehicle controller 101 outputs an instruction signal for instructing the screw drive motor 103 to perform the rotation operation, an operation for notifying that the screw feeder 13 has started the rotation operation via the port 102. A signal (corresponding to the first operation signal) is output to the system controller 50. In addition, when the loading vehicle controller 101 outputs a stop signal for stopping the rotation operation to the screw drive motor 103, an operation signal for notifying that the screw feeder 13 has stopped the rotation operation via the port 102. (Corresponding to the second operation signal) is output to the system controller 50. The system controller 50 controls the drive of the damper drive motor 107 and the valve drive motor 108 based on these operation signals, which will be described in detail in the flowchart described later. The system controller 50 may be a single processor or a multiprocessor including a plurality of CPUs.

  The gate drive motor 105 opens and closes the gate 15 based on the output signal from the loading vehicle controller 101. When the gate 15 is opened, the coal 12 is allowed to fall onto the sleeve 14, and when the gate 15 is closed, the coal 12 is prevented from dropping onto the sleeve 14. The loading vehicle controller 101 may or may not notify the system controller 50 of the gate 15 opening / closing information.

  Based on the output signal of the charging vehicle controller 101, the sleeve drive motor 104 moves the sleeve 14 between a standby position (a position indicated by a solid line in FIG. 3) and a coal charging position (a position indicated by a dotted line in FIG. 3). Make it work. The sleeve 14 is formed in a cylindrical shape, and is connected to the coal charging hole of the carbonizing chamber 1A at the coal charging position, and the coal 12 cut out by the screw feeder 13 is gravity dropped toward the carbonizing chamber 1A. Allow to do. The charging vehicle controller 101 may or may not notify the system controller 50 of the operation information of the sleeve 14.

  The lid removal device drive motor 106 opens the lid removal device 17 (not shown in FIG. 3) provided in the loading vehicle 10 based on the output signal of the loading vehicle controller 101 (the position indicated by the dotted line in FIG. 3). And the lid closed position (the position indicated by the solid line in FIG. 3). A magnet unit 16 is provided at the tip of the lid removing device 17, and the magnet unit 16 is magnetized by electric power supplied from the magnetizing power source 110. Here, the magnet part 16 is located immediately above the charging lid (not shown) which covers the coal charging hole of the carbonizing chamber 1A in the lid closed position. In addition, the charging lid is provided with a magnetic body (for example, an iron plate). Therefore, when the lid removing device 17 is moved from the lid closed position toward the lid open position while the magnet portion 16 is magnetized, the charging lid slides together with the magnet portion 16 so that the coal charging hole is formed. be opened.

  Further, when the coal charging operation to the coking chamber 1A is completed, the lid removing device 17 moves the magnetized magnet portion 16 from the lid open position shown in FIG. The coal charging hole is closed using the adsorbed charging lid. Here, the loading vehicle controller 101 controls the lid removing device drive motor 106 to move the magnet unit 16 to the lid closing position shown in FIG. An operation signal (corresponding to a third operation signal) notifying that the movement has been performed is output to the system controller 50.

  After installing the charging lid, it is necessary to seal the periphery of the charging lid in order to suppress the blowout of the carbonization gas in the furnace from the gap formed around the charging lid. Mortar can be used for the seal. The control valve drive motor 111 controls the supply amount of mortar supplied around the charging lid by controlling opening and closing of the mortar control valve 18. The mortar control valve 18 is provided in a supply pipe extending from a mortar supply device (not shown). The mortar supply device is installed at a position separated from the sleeve 14 and moves together with the charging vehicle 10. The supply pipe can be expanded and contracted between a standby position retracted from the periphery of the charging lid and a supply position for supplying mortar around the charging lid.

  Here, when the charging vehicle controller 101 outputs an instruction signal for closing the mortar control valve 18 to the control valve drive motor 111, it notifies that the mortar control valve 18 is closed via the port 102. A signal (corresponding to a fourth operation signal) to be output to the system controller 50.

  Next, the configuration of the switching valve 7 will be described in detail with reference to the operation explanatory diagram of FIG. The switching valve 7 includes a valve body 71 and a valve body rotating shaft 72. A circle indicated by a dotted line represents the rotation locus of the valve element 71. The valve body 71 rotates between the position shown in FIG. 5A and the position shown in FIG. 5C using the valve body rotation shaft 72 as a rotation axis.

  Referring to FIG. 5A, the valve body 71 closes the low-pressure fluid supply pipe 203 and has the largest opening degree with respect to the high-pressure fluid supply pipe 202. Accordingly, the high-pressure fluid flowing through the high-pressure fluid supply pipe 202 has a very small resistance received from the valve body 71, and therefore flows into the main supply pipe 201 with very little pressure loss. Referring to FIG. 5C, the valve body 71 closes the high pressure fluid supply pipe 202 and has the largest opening degree with respect to the low pressure fluid supply pipe 203. Therefore, only the low-pressure fluid supplied from the low-pressure fluid supply pipe 203 flows into the main supply pipe 201. Referring to FIG. 5B, the valve body 71 provides resistance to both the high-pressure fluid flowing through the high-pressure fluid supply pipe 202 and the low-pressure fluid flowing through the low-pressure fluid supply pipe 203.

  Therefore, the pressure level of the pressurized fluid supplied to the main supply pipe 201 is lowered in the order of FIGS. 5A, 5B, and 5C. In other words, the valve body 71 functions as a pressure adjusting member that lowers the pressure level of the pressure fluid flowing into the main supply pipe 201 according to the rotation amount.

  According to the switching valve 7 of the present embodiment, the pressure level of the pressurized fluid can be changed in multiple stages according to the rotation amount of the valve body 71. Accordingly, since it is not necessary to provide a large number of pressure fluid supply units independently in order to obtain a desired pressure fluid, the equipment layout can be simplified and the cost can be reduced.

  Next, the work sequence of work performed by the loading vehicle 10 will be briefly described with reference to FIGS. 3 and 4. When the coal receiving hopper 11 receives coal, the charging vehicle 10 moves to the first carbonizing chamber 1A (hereinafter referred to as kiln A). When the charging vehicle 10 arrives at the kiln A, the magnet unit 16 is moved from the lid open position shown in FIG. 3 to the lid closed position, the magnet unit 16 is magnetized, and the charging lid is attracted to the magnet unit 16. . The charging vehicle 10 moves the magnet portion 16 that has attracted the charging lid from the lid closing position shown in FIG. 3 to the lid opening position, and opens the coal charging hole of the kiln A. When the coal charging hole of the kiln A is opened, the charging vehicle 10 moves the sleeve 14 from the standby position shown in FIG. 3 to the coal charging position to connect the sleeve 14 and the coal charging hole, and 15 is driven from the closed position to the open position.

  When the gate 15 is driven to the open position, the charging vehicle 10 rotates the screw feeder 13 and charges the coal 12 cut by the screw feeder 13 into the kiln A. When the charging operation of coal is completed, the charging vehicle 10 stops the screw feeder 13 and returns the gate 15 from the open position to the closed position, thereby prohibiting the coal from falling. When the gate 15 returns to the closed position, the charging vehicle 10 moves the sleeve 14 from the coal charging position shown in FIG. 3 to the standby position and moves the magnetized magnet portion 16 from the lid open position shown in FIG. The coal charging hole is closed by using the charging lid adsorbed by the magnet unit 16 and moved to the lid closing position.

  When the coal charging hole is closed, the charging vehicle 10 returns to the coal tower, receives new coal, and moves toward the next carbonization chamber 1A (hereinafter referred to as kiln B). Here, a plurality of (for example, four) carbonization chambers 1A are provided between the kiln A and the kiln B, and when the charging vehicle 10 reaches the kiln B, the mortar supply device is kiln A. To reach. When the mortar supply device reaches the kiln A, the charging vehicle 10 opens the mortar control valve 18 and closes and seals the gap formed around the charging lid with the mortar. When the sealing process of the kiln A is completed, the charging vehicle 10 opens the charging lid of the kiln B and repeats the above-described operation.

  Next, a method for adjusting the furnace pressure in the coking chamber 1A will be described with reference to FIGS. FIG. 6 is a data table showing various types of information stored in the storage unit 60. The flowchart of FIG. 7 shows processing performed by the system controller 50 during dry distillation. In the initial state, the valve body 71 is driven to a position (the position shown in FIG. 5C) that closes the high-pressure fluid supply pipe 202, and the furnace pressure adjustment damper 6 is driven to the fully closed position. To do.

  In the initial stage of dry distillation, that is, during and after coal charging, dry distillation gas violently blows out from the coal and sudden pressure fluctuations occur in the furnace, so a high pressure fluid is supplied (the first control mode is implemented). To suppress large fluctuations in the furnace pressure. After the initial stage of dry distillation, the dry distillation gas ejected from the coal decreases, and the fluctuation in the furnace pressure becomes relatively small. Therefore, the opening of the furnace pressure adjusting damper 6 is adjusted while supplying the low-pressure fluid (the second control mode is changed). Execute) to suppress minute fluctuations in the furnace pressure. In the present embodiment, after the rotation operation of the screw feeder is started and before the sealing process around the charging lid is completed, “the amount of dry distillation gas released from coal (gas generation amount per unit time) is greater than a predetermined value. Corresponds to the case of “high”. The predetermined value can predict the furnace pressure in the coking chamber 1A by experiment or simulation.

  Referring to FIG. 7, in step S <b> 101, system controller 50 starts receiving an operation signal output from loading vehicle 10 and starts internal timer 51. In step S102, the system controller 50 determines whether or not an operation signal indicating that the screw feeder 13 has started rotating operation has been received. Here, according to the knowledge of the present inventors, it is known that the furnace pressure in the coking chamber 1A increases rapidly immediately after the screw feeder 13 starts rotating. Therefore, when the screw feeder 13 starts rotating (step S102, YES), the system controller 50 sets the pressure suppression level by the nozzle device 5 to the high pressure level 1 in step S103 and the furnace pressure adjusting damper 6 Set to fully open.

  As a result, a high-pressure fluid at high pressure level 1 (corresponding to a high-pressure fluid having a first pressure value) is supplied to the inside of the connecting pipe 3, and rapid fluctuations in the furnace pressure of the furnace A can be suppressed by the ejector effect. Note that the pressure fluid at the high pressure level 1 has the highest pressure level, and can be generated, for example, by operating the valve body 71 to the position shown in FIG.

  In step S104, the system controller 50 determines whether or not an operation signal indicating that the screw feeder 13 has stopped rotating is received. Here, according to the knowledge of the present inventors, when the screw feeder 13 stops rotating, the furnace pressure fluctuation in the coking chamber 1A can be alleviated more than immediately after the screw feeder 13 starts rotating. know. Therefore, when the screw feeder 13 stops rotating (YES in step S104), the system controller 50 rotates the valve body 71 by a predetermined amount in the clockwise direction in step S105, thereby suppressing the pressure by the nozzle device 5. The level is set to high pressure level 2 which is lower than high pressure level 1.

  Thereby, the high pressure fluid of the high pressure level 2 (corresponding to the high pressure fluid of the second pressure value) is supplied to the inside of the connecting pipe 3, and the rapid fluctuation in the furnace pressure of the furnace A can be suppressed by the ejector effect. Further, by reducing the pressure level of the high-pressure fluid, it is possible to prevent problems such as the outside air being sucked into the carbonization chamber 1A and adversely affecting the furnace body. Furthermore, by limiting the pressure level of the high-pressure fluid to be lowered, gas leakage when the sleeve 14 is raised and the charging lid is closed can be suppressed. The opening degree of the valve body 71 corresponding to the high pressure level 2 can be appropriately set according to the specification of the switching valve 7.

  In step S106, the system controller 50 determines whether or not an operation signal indicating that the loading lid is closed has been received. Here, according to the knowledge of the present inventors, when the charging lid is closed, the degree of gas leakage is reduced, and the furnace pressure fluctuation in the carbonizing chamber 1A is less than immediately after the screw feeder 13 stops rotating. , Know that will be mitigated. Therefore, when the charging lid is closed (YES in step S106), the system controller 50 further increases the pressure suppression level by the nozzle device 5 by further rotating the valve body 71 in the clockwise direction in step S107. High pressure level 3 lower than level 2 is set.

  As a result, a high-pressure fluid at a high pressure level 3 (corresponding to a high-pressure fluid having a third pressure value) is supplied to the inside of the connection pipe 3, and rapid fluctuations in the furnace pressure of the furnace A can be suppressed by the ejector effect. The opening degree of the valve body 71 corresponding to the high pressure level 3 can be appropriately set according to the specification of the switching valve 7.

  In step S108, the system controller 50 determines whether or not an operation signal indicating that the sealing work around the loading lid has been completed is received. Here, according to the knowledge of the present inventors, it is understood that when the sealing work around the charging lid is completed, the fluctuation in the pressure in the furnace in the carbonization chamber 1A is more relaxed than immediately after the charging lid is closed. Yes. Therefore, when the sealing operation is completed (YES in step S108), the system controller 50 further rotates the valve body 71 in the clockwise direction in step S109, thereby setting the pressure suppression level by the nozzle device 5 to the high pressure level 3. Change to a lower low pressure level. The pressure fluid at the low pressure level has the lowest pressure level, and is generated, for example, by operating the valve body 71 to the position shown in FIG. As a result, a low pressure fluid (corresponding to a low pressure fluid having a fourth pressure value) is supplied to the inside of the connecting pipe 3, and minute furnace pressure fluctuations in the furnace A can be suppressed by the ejector effect.

  In step S110, the system controller 50 determines whether or not the count time by the internal timer 51 has reached T1. If the count time reaches T1 (YES in step S110), the process proceeds to step S111. If the count time has not reached T1 (NO in step S110), the process returns to step S109, and the low pressure level 1 and the furnace pressure adjustment damper 6 are kept fully open.

  In step S111, the system controller 50 reduces the opening degree of the furnace pressure adjusting damper 6 from 80% to 80%. Here, coal (usually blended coal containing a plurality of brands of coal is used) starts to expand at about 400 ° C., resolidifies at about 500 ° C., and contracts to about 1000. Since the dry distillation gas released from the coal during the dry distillation period gradually decreases, the opening of the furnace pressure adjusting damper 6 is reduced from 80% to 80% when the count time reaches T1.

  In step S112, the system controller 50 determines whether or not the count time by the internal timer 51 has reached T2. If the count time reaches T2 (YES in step S112), the process proceeds to step S113. When the count time has not reached T2 (NO in step S112), the process returns to step S111 and maintains the low pressure level 1 and the valve opening degree thus far (that is, the opening degree of the furnace pressure adjusting damper 6 is 80%). .

  In step S113, the system controller 50 reduces the opening degree of the furnace pressure adjusting damper 6 from 80% to 60%. That is, when the count time reaches T2, the amount of dry distillation gas released from the coal is further reduced, so the opening degree of the furnace pressure adjusting damper 6 is lowered from 80% to 60%.

  In step S114, the system controller 50 determines whether or not the count time by the internal timer 51 has reached T3. When the count time reaches T3 (step S114 YES), the process proceeds to step S115. If the count time has not reached T3 (NO in step S114), the process returns to step S113, and maintains the low pressure level 1 and the previous valve opening (that is, the opening of the furnace pressure adjusting damper 6 is 60%). .

  In step S115, the system controller 50 reduces the opening degree of the furnace pressure adjusting damper 6 from 60% to 40%. That is, when the count time reaches T3, the amount of gas released from the coal is further reduced, so the opening degree of the furnace pressure adjusting damper 6 is lowered to 40%.

In step S116, the system controller 50 determines whether or not the count time by the internal timer 51 has reached T4. When the count time reaches T4 (YES in step S116), the process ends because the dry distillation of coal is completed. If the count time has not reached T4 (NO in step S116), the process returns to step 115, and maintains the low pressure level 1 and the previous valve opening (that is, the opening of the furnace pressure adjusting damper 6 is 40%). .

  Here, the opening degree of the furnace pressure adjusting damper 6 during dry distillation is an example, and can be appropriately changed according to the specifications of the furnace pressure adjusting damper 6. Further, the count times T1, T2, T3, and T4 can be set based on the monitoring result by monitoring the pressure in the coking chamber 1A, which changes from moment to moment, using, for example, a pressure sensor. In addition, when the behavior of the gas release amount changes due to the change in the brand of the blended coal, the count times T1, T2, T3, and T4 can be changed according to the properties of the blended coal. Furthermore, even when preheated coal by DAPS (Dry-cleaned and Agglomerated Precompaction System) is charged into the coking chamber 1A, the count times T1, T2, T3, and T4 can be changed according to the properties of the preheated coal. Furthermore, the count times T1, T2, T3, and T4 can be set as appropriate in accordance with the behavior change of the gas discharge amount accompanying the change in operating rate (change in coke oven temperature and charging coal temperature).

  In this way, by dividing the entire period from coal charging to the end of dry distillation into the initial stage of dry distillation and the period after the initial stage of dry distillation according to the gas generation level, by carrying out the pressure adjustment method corresponding to each period, In-furnace fluctuations can be stably suppressed over the entire period.

  Further, a large pressure fluctuation at the initial stage of dry distillation can be suppressed based on the operation signal output from the charging vehicle 10. This eliminates the need to consider detection errors due to clogging of the pressure sensor and the like, so that the coke oven can be operated stably. That is, during the coal charging, since it is possible to easily follow the rapid furnace pressure fluctuation peculiar immediately after the coal charging, the furnace pressure in the coking chamber 1A can be more stably maintained. Furthermore, minute fluctuations in the furnace pressure after the initial stage of dry distillation can be easily adjusted by driving the furnace pressure adjusting damper 6.

(Modification 1)
In the above-described embodiment, the nozzle device 5, the high-pressure fluid supply unit 8, the low-pressure fluid supply unit 9, the main supply pipe 201, the high-pressure fluid supply pipe 202, and the low-pressure fluid supply pipe 203 cooperate to form a “supply unit”. Although configured, the present invention is not limited to this, and other configurations may be used. In other words, the “supply unit” may include the nozzle device 5 and a plurality of pressure fluid supply devices each capable of supplying pressure fluid having different pressure levels to the nozzle device 5. In this case, the “control unit” includes a damper drive motor 107, a system controller 50, a switching valve for selecting a pressure fluid supply unit corresponding to a desired pressure, and a motor for operating the switching valve. It may be realized by doing. The “supply unit” may be realized by the cooperation of the nozzle device and one supply device that supplies the pressure fluid to the nozzle device. In this case, the “control unit” may be realized by the cooperation of the damper drive motor 107, the system controller 50, and the adjustment unit that adjusts the pressure of the nozzle device 5 itself.

(Modification 2)
In the above-described embodiment, the pressure level of the high-pressure fluid is set when the rotation operation of the screw feeder 13 is started, when the rotation operation of the screw feeder 13 is stopped, when the coal charging hole is closed by the charging lid, and when the seal around the charging lid is completed. However, the present invention is not limited to this, and the pressure level may be changed at other timings as long as rapid fluctuations in the furnace pressure immediately after charging during coal charging can be suppressed. For example, the pressure fluid may be changed from the high pressure level 1 to the high pressure level 2 when the closing signal of the gate 15 is received instead of the rotation operation stop signal of the screw feeder 13. For example, the pressure fluid may be changed from the high pressure level 2 to the high pressure level 3 when receiving an excitation OFF signal indicating that the magnet 16 has been demagnetized, not when the coal charging hole is closed.

(Modification 3)
In the above-described embodiment, the pressure level is changed based on the operation signal output from the charging vehicle 10, but the present invention is not limited to this, and other information that can specify the operating state of the charging vehicle 10 is used. You can also. For example, immediately after the screw feeder 13 starts rotating, counting by the internal timer 51 is started, and when the counting time reaches the time when the screw feeder 13 is stopped, the time when the charging lid is closed, the pressure level of the pressure fluid May be changed. Further, the time at which the screw feeder 13 is stopped and the time at which the loading lid is closed can be estimated by performing an experiment or a simulation, and the estimated time is stored in the storage unit 60. The pressure level can be changed at an appropriate timing.

(Modification 4)
In the above-described embodiment, the screw feeder is used as the coal cutting device. However, the present invention is not limited to this, and other coal cutting devices such as a rotary valve and a table feeder can also be used.

1 ... Coke oven 1A ... Coke oven carbonization chamber
2 ... Rising pipe 3 ... Connecting pipe 4 ... Dry main 5 ... Nozzle device 6 ... Furnace pressure adjusting damper
7 ... Switching valve 8 ... High pressure fluid supply section
9 ... Low pressure fluid supply part 10 ... Loading vehicle
11 ... Coal receiving hopper 12 ... Coal
13 ... Screw feeder 14 ... Sleeve 15 ... Gate 16 ... Magnet part
17 ... Lid device 18 ... Mortar control valve
20 ... Extruder 30 ... Guide car
50 ... System controller 60 ... Storage unit
71 ... Valve body 72 ... Valve body rotating shaft 101 ... Loading vehicle controller 102 ... Port
DESCRIPTION OF SYMBOLS 103 ... Screw drive motor 104 ... Sleeve drive motor 105 ... Gate drive motor 106 ... Lid drive device drive motor
107 ... Damper drive motor 108 ... Valve drive motor
201 ... Main supply pipe 201a ... Merging section
202 ... High-pressure fluid supply pipe 203 ... Low-pressure fluid supply pipe

Claims (8)

In the furnace pressure regulator that controls the furnace pressure of the coke oven carbonization chamber,
A supply unit for supplying a pressure fluid to the inside of a connecting pipe connecting a rising pipe and a dry main of the coke oven carbonization chamber via a nozzle device;
A furnace internal pressure adjusting damper disposed inside the connecting pipe;
A control unit that suppresses fluctuations in the furnace pressure by controlling the driving of the supply unit and the furnace pressure adjusting damper; and
Have
The control unit implements a first control mode in which a high-pressure fluid is supplied from the supply unit in the initial stage of dry distillation in which the amount of dry distillation gas released from coal is higher than a predetermined value, and the dry distillation gas released from coal A furnace internal pressure characterized by performing a second control mode for adjusting an opening of the furnace pressure adjusting damper while supplying a low-pressure fluid from the supply section after the initial stage of dry distillation with a gas amount of not more than a predetermined value. Adjustment device. The controller is
In the first control mode, the pressure level of the high-pressure fluid is changed according to the operating state of the coal charging vehicle,
In the second control mode, the pressure fluid is switched from the high-pressure fluid to the low-pressure fluid according to the operating state of the coal charging vehicle, and the opening degree of the furnace pressure adjusting damper is lowered stepwise. The furnace pressure adjusting device according to claim 1. Furthermore, it has a storage unit for storing the pressure level of the high-pressure fluid in association with the type of operation signal output according to the operation state of the coal charging vehicle,
The control unit sets the pressure level of the high-pressure fluid supplied from the supply unit by reading the pressure level corresponding to the operation signal from the storage unit when receiving the operation signal. The furnace pressure adjusting device according to claim 2. The operation signal is
A first operation signal indicating that the coal cutting device of the coal charging vehicle has started rotating;
A second operation signal indicating that the coal cutting device has stopped rotating;
A third operation signal indicating that the charging lid of the coke oven carbonization chamber is closed by the coal charging vehicle;
A fourth operation signal indicating that the sealing process around the charging lid has been completed by the coal charging vehicle,
The controller is
When the first operation signal is received, the supply unit is controlled so that the high-pressure fluid having a first pressure value is supplied;
Controlling the supply unit so that the high-pressure fluid having a second pressure value lower than the first pressure value is supplied when the second operation signal is received;
Controlling the supply unit so that the high-pressure fluid having a third pressure value lower than the second pressure value is supplied when the third operation signal is received;
The said supply part is controlled so that the said low pressure fluid of the 4th pressure value lower than the said 3rd pressure value is supplied when the said 4th operation signal is received. The furnace pressure adjusting device described in 1. The supply unit
A main supply pipe for supplying a pressure fluid to the nozzle device;
A high-pressure fluid supply pipe connected to a junction formed at a start end of the main supply pipe and supplying the high-pressure fluid;
A low pressure fluid supply pipe connected to the junction and supplying the low pressure fluid;
A switching valve having a valve body that is provided in the merging portion and changes a supply path between the high-pressure fluid supply pipe and the low-pressure fluid supply pipe by rotating;
The valve body increases the resistance given to the high-pressure fluid according to the amount of rotation when the supply path is rotated in the direction of changing the high-pressure fluid supply pipe to the low-pressure fluid supply pipe, thereby increasing the pressure level of the high-pressure fluid. 5. The furnace pressure adjusting device according to claim 1, which also serves as a pressure adjusting member for lowering the pressure. In the in-furnace pressure adjusting method of the coke oven carbonization chamber in which the in-furnace pressure adjusting damper is arranged inside the connecting pipe connecting the rising pipe and the dry main body
A first step of supplying a high-pressure fluid into the connecting pipe at an initial stage of dry distillation in which the amount of dry distillation gas released from coal is higher than a predetermined value;
A second step of adjusting the opening of the furnace pressure adjusting damper while supplying low-pressure fluid into the connection pipe after the initial stage of dry distillation in which the amount of dry distillation gas released from coal is a predetermined value or less;
A furnace pressure adjusting method characterized by comprising: In the first step, the pressure level of the high-pressure fluid is changed according to the operating state of the coal charging vehicle,
The furnace pressure adjusting method according to claim 6, wherein in the second step, the opening degree of the furnace pressure adjusting damper is lowered stepwise. In the first step,
When the coal cutting device of the coal charging vehicle starts rotating, the high pressure fluid of the first pressure value is supplied,
When the coal cutting device stops rotating, the high-pressure fluid having a second pressure value lower than the first pressure value is supplied,
When the charging lid of the coke oven carbonization chamber is closed by the coal charging vehicle, the high-pressure fluid having a third pressure value lower than the second pressure value is supplied,
8. The low-pressure fluid having a fourth pressure value lower than the third pressure value is supplied when the sealing process around the charging lid is completed by the coal charging vehicle. The furnace pressure adjustment method as described.

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