JP4235082B2 - Coke oven furnace wall repair method and apparatus - Google Patents

Description

The present invention is co - the through damaged portion of the box furnace furnace wall from the coking chamber side together to penetrate the SiCl ₄ containing gas, by entering the combustion gas containing steam from the combustion chamber side, SiO the through damaged portion ₂ The present invention relates to a furnace wall repairing method and a repairing apparatus for a coke oven, in which the inner wall of the furnace is repaired by depositing slag.

After allowing the SiCl ₄ -containing gas to penetrate from the carbonization chamber side into the through-damage portion of the coke oven carbonization chamber furnace wall, the process of allowing the gas containing water vapor to penetrate from the combustion chamber side is repeated several times. A method of repairing the carbonization chamber furnace wall by precipitating SiO ₂ is proposed (for example, see Patent Document 1).

In Patent Document 1, the supply pipe “valve” is opened and a certain amount of SiCl ₄ -containing gas is supplied so that the pressure in the carbonization chamber becomes higher than the combustion chamber pressure. Then, the “valve” is closed and the state is maintained for a certain time. An SiCl ₄ containing gas intrusion step, and an SiO ₂ precipitation step in which the exhaust device is operated with the “valve” of the exhaust device opened to discharge the gas in the carbonization chamber for a certain time so that the pressure in the carbonization chamber is lower than the pressure in the combustion chamber. Proposed repair methods have been proposed.
JP 2002-212565 A

  However, the technique described in Patent Document 1 still has the following problems to be solved.

  The first problem is to improve the efficiency of the furnace wall repair work.

In the case of the method described in Patent Document 1, the time for repairing the coke oven furnace wall is greatly affected by the supply process of the SiCl ₄ containing gas to the carbonization chamber and the exhaust gas exhaust process. ) Is also greatly affected.

  In view of the request not to lower the operation efficiency of the coke oven, it is an essential condition required for the repair technology to end the coke oven furnace wall repair work time in the shortest time. However, Patent Document 1 does not describe or suggest a technique for improving the efficiency of furnace wall repair work.

  The second problem is to establish means for grasping the furnace wall repair state.

In the repair of a coke oven furnace wall by the method described in Patent Document 1, it is possible to grasp the repair state of the furnace wall early and quantitatively to improve the efficiency of work, reduce the work load of workers, and more expensive materials. This is extremely important in reducing the material cost by supplying an appropriate amount of (SiCl ₄ ). However, Patent Document 1 does not describe or suggest a means for grasping the furnace wall repair state.

  The third problem is to establish an operation support technology for efficiently proceeding with the furnace wall repair work.

In the furnace wall repair work described in Patent Document 1, a series of steps from the supply of the SiCl ₄ -containing gas to the carbonization chamber to the gas discharge step is repeated a plurality of times. Opening and closing operations and switching operations are required. For this reason, there is a need for a technique for assisting the worker so that the furnace wall repair work can be performed smoothly and safely without causing an erroneous operation due to a human error or the like.

  The present invention has been made in view of such circumstances, and it is an object of the present invention to provide a furnace wall repair method and apparatus for a coke oven that can make furnace wall repair work more efficient and further reduce the work load. .

The method for repairing a coke oven furnace wall according to claim 1 of the present invention is a method of repairing a coking chamber furnace wall by spraying SiCl ₄ after emptying the coking chamber to be repaired and making it sealed. A supply step of supplying the sprayed SiCl ₄ into the carbonization chamber; and after completion of the supply step of the SiCl ₄ , an inert gas is supplied into the carbonization chamber, and the pressure in the carbonization chamber is maintained under pressure. A pressure- holding step for determining a repair state of the furnace wall based on the pressure in the carbonization chamber, an exhaust step for exhausting the carbonization chamber, and a control step for executing the supply step, the pressure- holding step, and the exhaust step in a predetermined order; Equipped with.

  The coke oven furnace wall repair method according to claim 2 of the present invention is the coke oven furnace wall repair method according to the invention described above, wherein the supplying step supplies the inert gas into the carbonization chamber. An inert gas supply step is further provided.

A furnace wall repair apparatus for a coke oven according to claim 3 of the present invention is for repairing a carbonization chamber furnace wall by spraying SiCl ₄ after evacuating and sealing the carbonization chamber to be repaired. in furnace wall repair device, the supply means for supplying the carbonization chamber the atomized said SiCl _4, after stopping supply of SiCl ₄ by the SiCl ₄ supply means supplies the inert gas into the carbonization chamber, carbide chamber pressure was Takashi圧retention, and the coercive pressure means for determining the repaired state of the oven wall based on the pressure of the carbonization chamber, and exhaust means for exhausting the carbonization chamber, said supply means, pressure holding means, the exhaust means And a control means for operating according to a predetermined order.

The oven wall repair device for coke oven according to claim 4 of the present invention is a repair device for coke oven is an invention of the above, wherein said supplying means, pressure holding means, the color of each operating state of the exhaust means The display means which changes and displays is provided.

The oven wall repair device for coke oven according to claim 5 of the present invention, set in the repair apparatus coke oven is an invention of the above, wherein said supplying means, pressure holding means, each of the operating conditions of the exhaust means With a setting screen to do.

The oven wall repair device for coke oven according to claim 6 of the present invention is a repair device for coke oven is an invention of the above, wherein said supplying means, pressure holding means, each of the operation start and stop of the exhaust means When the operation button on the operation screen is selected, a pop-up screen with a message is displayed.

A coke oven furnace wall repair device according to claim 7 of the present invention is a coke oven repair device according to the invention described above, wherein the operation screen for operating and stopping the mobile carriage mounted with the supply means is provided. Equipped with.

  According to the furnace wall repair method for a coke oven of the present invention, the furnace wall repair work can be made more efficient and the work load can be reduced.

[Configuration of coke oven furnace wall repair equipment]
FIG. 1 is a view showing the arrangement of a coke oven furnace wall repair device together with a cross-sectional view of a coke oven carbonization chamber.

  The coke oven furnace wall repair device of the present embodiment is movably disposed on both sides of the coke oven 1, that is, on both sides of the guide wheel side and the extruder side.

A SiCl ₄ supply device 10 is loaded on a carriage configured to be freely movable on the middle floor of the coke oven 1 on the guide car side. The SiCl ₄ supply device 10 is provided with a tank for storing liquid SiCl ₄ , a pump, a supply valve, piping, and the like. In addition, the SiCl ₄ supply device 10 presents the operating status to the driver and the control device that controls operations such as the supply of SiCl _{4 by} cooperating with an exhaust gas treatment facility described later, and from the driver. A display device for inputting the operation instructions is provided.

The SiCl ₄ supply device 10 is provided with a supply pipe 11 a and an exhaust pipe 11 b, and the supply pipe 11 a and the exhaust pipe 11 b are attached to the kiln opening of the coke oven 1 and dedicated to a furnace cover 12. Are connected to each other through a through hole and a flange.

  Further, the furnace lid 12 is provided with a through hole for measuring the pressure in the carbonization chamber. A pressure gauge 13 described later can be attached to the pressure conduit connected to the through hole.

  On the other hand, a furnace cover 15 dedicated for repair is attached to the kiln mouth on the extruder side of the coke oven 1, and a gas exhaust pipe 16 is attached to the furnace cover 15 so as to penetrate the furnace cover 15. This gas exhaust pipe 16 is for exhausting the gas in the carbonization chamber to the outside of the furnace lid 15 attached to the kiln opening.

  Further, an exhaust relay device 17 is provided on a carriage that runs along the coke oven 1 on the middle floor on the extruder side of the coke oven 1, and the gas inside the carbonization chamber passes through the exhaust relay device 17 to form an exhaust gas duct. The harmful gas in the exhaust gas is removed by the exhaust gas treatment facility.

  FIG. 2 is a diagram illustrating a configuration of the exhaust gas treatment facility.

  After the exhaust gas control valve 22 is opened, the exhaust gas sent into the exhaust gas duct 18 is sucked by the exhaust blower 21 provided in the exhaust gas processing facility and guided to the exhaust gas processing facility.

  After passing through the heat exchanger 23, the exhaust gas is sprinkled in the primary scrubber 24 and the secondary scrubber 25 to remove dust and harmful components. The acidic spray water that has absorbed HCL in the exhaust gas in the primary scrubber 24 and the secondary scrubber 25 is neutralized by NaOH supplied from the NaOH tank 26 and then drained outside the system. On the other hand, the exhaust gas from which dust and harmful components have been removed by the primary scrubber 24 and the secondary scrubber 25 is exhausted from the chimney to the outside of the system.

In the present embodiment, the exhaust gas duct 18 not only guides the exhaust gas to the exhaust gas treatment facility, but is also used as a path for supplying an inert gas such as N ₂ into the carbonization chamber. For this reason, the exhaust gas duct 18 is provided with an inert gas control valve 27.

[Operation of coke oven furnace wall repair equipment]
Next, operation | movement of the furnace wall repair apparatus of a coke oven is demonstrated.

In the coke oven furnace wall repair method according to the present embodiment, the following steps are repeated. That is, the furnace wall is repaired by cyclically executing the “exhaust / bypass process”, the “supply process”, and the “pressure holding / verification process”. These operations are controlled by a control device mounted on the SiCl ₄ supply device 10.

  FIG. 3 is a flowchart showing a schematic operation related to furnace wall repair of a coke oven.

When the operation is started, first, an “exhaust / bypass process” is executed. In this step, the gas in the carbonization chamber is discharged, and the SiCl ₄ supply device 10 performs a preparatory operation for supplying SiCl ₄ .

  Therefore, in the exhaust gas treatment facility shown in FIG. 2, after the inert gas control valve 27 is closed, the exhaust gas control valve 22 is opened (T1). Thereby, the exhaust gas in the carbonization chamber is sucked by the exhaust blower 21.

On the other hand, in the SiCl ₄ supply device 10, the bypass operation is started (S1).

FIG. 4 is a piping diagram showing a fluid path in the SiCl ₄ supply device during bypass operation. In FIG. 4, the path through which the fluid flows is represented by a thick line, and the path through which the fluid does not flow is represented by a thin line. Therefore, it is assumed that the valves that allow the fluid to pass through the path indicated by the thin line are in a closed state, and the description of the open / closed state of each valve is omitted.

The SiCl ₄ supply device 10 is provided with a take-in portion connected to the inert gas pipe 11c in addition to a take-out portion connected to the supply pipe 11a and the exhaust pipe 11b.

In the bypass operation, the metering pump 40 starts operation after the valve 53 → the valve 62 → the valve 63 → the valve 64 is opened. Then, N ₂ supplied from the inert gas pipe 11 c pressurizes the liquid SiCl ₄ in the supply tank 42 via the three-way valve 41. A predetermined amount of SiCl ₄ is delivered by the metering pump 40, and pressurization with N ₂ is for adjusting the conditions so that this metering can be smoothly performed.

After the pulsation of SiCl ₄ is suppressed by the accumulator 43, the pressure is further adjusted by the valve 63. Here, since the valve 58 is closed, the flow of SiCl ₄ stops at this valve 58 and is not supplied to the supply piping 11a side. Accordingly, the SiCl _{4 that} has passed through the valve 64 is returned to the supply tank 42 via the check valve 44 again.

Thus, in the bypass operation, conditions such as flow rate and pressure are adjusted so that SiCl ₄ can smoothly move to the next supply step while circulating through a predetermined path.

  Then, for example, when a predetermined time has elapsed from the start of the bypass operation, it is determined that the bypass operation has ended (S2). Further, for example, when a predetermined time has elapsed from the start of the exhaust process, it is determined that the exhaust process has ended (T3). When it is determined that both of them are finished, the exhaust gas control valve 22 is closed (T4).

Next, the “supply process” is executed. This "supplying step", from the extruder side N ₂ is an inert gas is blown, which SiCl ₄ carbonization chamber from SiCl ₄ supply apparatus 10 of the coke oven 1 is supplied with.

First, the inert gas control valve T5 is opened (T5). As a result, as shown in FIG. 1, the N ₂ gas passes through the exhaust relay device 17 from the exhaust gas duct 18 and is introduced into the carbonization chamber via the gas exhaust pipe 16 attached to the furnace lid 15.

In the SiCl ₄ supply device 10, the supply operation is started (S3).

FIG. 5 is a piping diagram showing a fluid path in the SiCl ₄ supply device during the supply operation. In FIG. 5, the path through which the fluid flows is represented by a thick line, and the path through which the fluid does not flow is represented by a thin line. Therefore, it is assumed that the valves that allow the fluid to pass through the path indicated by the thin line are in a closed state, and the description of the open / closed state of each valve is omitted.

In the SiCl ₄ supply device 10, the valve 52 is opened from the above-described bypass operation state. Then, N ₂ is guided to the ejector 45. Next, after opening the valve 58 and closing the valve 64, SiCl ₄ is guided to the ejector 45.

The ejector 45 is a two-fluid nozzle having a venturi structure, sucks SiCl ₄ by increasing the flow rate of N _{2 at} the narrowest tube diameter portion, mixes N ₂ and SiCl ₄ liquid, and forms a spray to form a coke oven 1. To supply.

In this way, by mixing the SiCl ₄ liquid and spraying it into the coke oven carbonization chamber, it becomes possible to repair the interior of the through-crack part of the brick in the furnace and the gap between the pores. .

When a predetermined amount of SiCl ₄ is sprayed into the carbonization chamber, it is determined that the supply operation is finished (S4). Subsequently, the “pressure holding / verifying step” is executed (S5).

In this “pressure holding / verification step”, N ₂ is charged into the carbonization chamber and charged. In the above-described supplying step, N ₂ has been turned from the extruder side (T5) is, after which SiCl ₄ feed device 10 has finished feed operation "pressure holding and verification process" is started, N ₂ Has been continuously introduced. On the other hand, after SiCl ₄ feed device 10 also performing the supply of the SiCl ₄ is charged with _{N 2} carbonization chamber.

FIG. 6 is a piping diagram showing a fluid path in the SiCl ₄ supply device during the pressure holding / verification operation. In FIG. 6, the path through which the fluid flows is represented by a thick line, and the path through which the fluid does not flow is represented by a thin line. Therefore, it is assumed that the valves that allow the fluid to pass through the path indicated by the thin line are in a closed state, and the description of the open / closed state of each valve is omitted.

From the state of the supply operation described above, in the SiCl ₄ supply device 10, the valve 52 is closed and the valve 51 is opened. Thereby, N ₂ for holding pressure is introduced into the carbonization chamber. Subsequently, the SiCl ₄ supply device 10 opens the valve 64 and closes the valve 58. As a result, SiCl ₄ is not supplied to the coke oven 1 and circulates through the path described in the bypass operation of FIG.

In this pressure holding / verification process, it is possible to grasp the furnace wall repair state in the carbonization chamber. If the furnace wall repair (sealing) effect in the inside of the carbonization chamber has been produced, the pressure inside the carbonization chamber will gradually increase in the pressure holding process. Thereby, the furnace wall repair effect in the carbonization chamber can be verified. The pressure inside the carbonization chamber can be confirmed by a pressure gauge 13 attached to a pressure conduit laid to the SiCl ₄ supply device 10.

FIG. 7 is a diagram illustrating a method of installing a pressure gauge. The pressure conduit 46 for detecting the pressure in the carbonization chamber is provided with valves 47 for purging the inside of the pressure conduit 46 together with the pressure gauge 13 with N ₂ . By performing the N ₂ purge by operating the valves 47 at appropriate time intervals, it is possible to prevent clogging in the pressure conduit 46 and to obtain a stable pressure measurement value.

  Based on the indicated value of the pressure gauge 13, the operator can grasp the furnace wall repair state and determine the end of the pressure holding process. Furthermore, the signal measured by the pressure gauge 13 is, for example, an electrical signal. It can be taken out and processed to automatically determine the end of the pressure holding process.

When the pressure holding / verifying step is completed (T6), the SiCl ₄ supply device 10 closes the valve 51 and ends the supply of the pressure holding N _2. However, the inert gas control valve 27 is also used in the exhaust gas treatment facility. in the closed ends of the introduction of coercive pressure _{N 2} (T7).

  Subsequently, the exhaust gas control valve 22 is opened. The pressure inside the carbonization chamber becomes negative due to the suction of the exhaust gas treatment facility, and the gas filling the carbonization chamber flows into the exhaust gas treatment facility via the exhaust gas duct 18 and is processed. After the above process is repeated for a preset number of times (T8), the furnace wall repair work is finished.

[Coke oven furnace wall repair operation support screen]
Next, an operation screen and a display screen for supporting the furnace wall repair operation of the coke oven will be described. As described above, the SiCl ₄ supply device 10 presents the operating status to the driver and the control device that controls the operation such as the supply of SiCl _{4 by} cooperating with the exhaust gas treatment facility, and the driver. A display device for inputting an operation instruction from is provided.

When the driver completes predetermined preparation for operating the SiCl ₄ supply device 10 and turns on the power, the menu screen shown in FIG. 8 is displayed on the display device.

  The menu screen includes “automatic operation screen”, “single process screen”, “operation display screen”, “setting screen”, “alarm screen”, “alarm history screen”, “electric vehicle operation permission screen”, “manual ( On the “Maintenance) screen”, switches for selecting each process and control are displayed.

  (1) When the driver selects the “automatic operation screen” switch, the automatic operation screen shown in FIG. 9 is displayed.

On the automatic operation screen, there are a system display unit 70 indicating a piping system and the like in the SiCl ₄ supply device 10, an operation operation unit 71 for operating start / stop of automatic operation, and a state display unit 72 indicating a work state currently in progress. Is provided.

  When the driver operates the automatic operation button from the driving operation unit 71, the operation of each process of “bypass”, “exhaust”, “supply”, and “holding pressure” is automatically repeated a predetermined number of times.

  The process currently being performed can be easily confirmed because the color is changed during display of the status display unit 72. Moreover, in the display of the system | strain display part 70, the path | route through which a fluid flows is displayed for each process, changing a color with another path | route, and the opening / closing state of a valve is also displayed for a different color. Furthermore, since the process amount such as pressure in each path is also displayed, it is possible to easily grasp the operation status. The system display unit 70 also displays the state of the valve of the exhaust gas treatment facility.

  Further, when the driver operates the automatic driving button from the driving operation unit 71, a driving password screen is displayed. When the passwords match, a pop-up screen 73 shown in FIG. 10 is displayed. The driver confirms this display and operates the “execute” key if the operation can be started, and operates the “cancel” key when the operation is not performed.

  Thus, by displaying various pop-up screens corresponding to a predetermined operation, it is possible to exert an effect in preventing human error such as a driver's operation mistake. Note that the pop-up screen 73 is also displayed in the case of automatic operation stop.

  (2) When the driver selects the “single process screen” switch, the single process screen shown in FIG. 11 is displayed.

The single process screen is provided with a system display unit 70 indicating a piping system in the SiCl ₄ supply device 10 and a single process operation unit 74 for operating start / stop of each single process.

  When the driver selects a desired process button from the single process operation unit 74, operation of the selected process is started. The display of the selected process button on the single process operation unit 74 changes to a color indicating that the vehicle is in operation. And it is possible to stop an operation | movement by selecting the process again. Further, when one process is operating, selection of other processes is prohibited.

  In the display of the system display unit 70, the route through which the fluid flows is displayed in a different color from the other routes, and the open / closed state of the valve is also displayed in the color. Furthermore, since the process amount such as pressure in each path is also displayed, it is possible to easily grasp the operation status. The system display unit 70 also displays the state of the valve of the exhaust gas treatment facility.

  The pop-up screen shown in FIG. 12 is also displayed in the operation start and stop operations during the single operation. When the driver selects “execute” on the pop-up screen, the selected isolated operation is started, and when “cancel” is selected, the operation is not executed. Note that a pop-up screen is also displayed when the isolated operation is stopped during the isolated operation.

  (3) When the driver selects the “operation display screen” switch, the operation display screen shown in FIG. 13 is displayed.

  The operation display screen is a screen that collectively represents the end and progress of each process in automatic operation and single process operation. Here, among the processes displayed on the status display section 75, the completed processes are displayed in red, the processes in the current progress state are displayed with flickering red, and the processes that have not yet been performed are displayed. Displayed in green. Therefore, the driver can quickly and accurately grasp the progress of the process.

  (4) When the driver selects the “setting screen” switch, a setting screen shown in FIG. 14 is displayed.

  A setting value display unit 76 and a setting operation unit 77 are provided on the setting screen. When the driver selects the setting button of the setting operation unit 77, a password screen is displayed, and when the password matches, the setting value display unit 76 can be set. The driver moves to an item for setting a flickering cursor and can set (change) a value from a numeric keyboard (not shown).

  By providing this setting screen, each process processing time, purge time, etc. can be easily changed, so that flexible operation corresponding to the situation becomes possible. For example, when there is a limit on the repairable time, it is possible to plan a repair work with the optimum content that can be performed within the limit.

  (5) When the driver selects the “alarm screen” switch, an alarm screen shown in FIG. 15 is displayed.

  This alarm screen displays an abnormal state that is currently occurring. Accordingly, if an abnormality occurs even while another screen is being displayed, this screen is forcibly displayed. When the driver selects the “stop buzzer” button, the alarm bell stops, and when the “reset” button is selected after canceling the cause of the abnormality, the alarm is released. As for the abnormality content, the abnormality item is displayed in the upper part and the details of the abnormality are displayed in the lower part. Therefore, the driver can accurately grasp the abnormality content based on the alarm screen, and can take a prompt action.

  (6) When the driver selects the “alarm history screen” switch, an alarm history screen shown in FIG. 16 is displayed.

  The alarm contents are displayed on the alarm history screen in the order of occurrence of the abnormality. Since the maximum number of cases displayed on one screen is 20, the driver can operate the up / down buttons (not shown) to scroll the screen and confirm past alarm contents.

  When an abnormality occurs, the alarm content is displayed in red, and is displayed in black after the driver operates the “reset” button. The time when the driver selects the “stop buzzer” button is displayed as “confirmation time”, and the time when the driver selects the “reset” button is displayed as “recovery time”.

Therefore, based on these pieces of information, it can be used for managing the furnace wall repair such as the creation of a maintenance plan for the SiCl ₄ supply device 10.

  (7) When the driver selects the “electric vehicle driving permission screen” switch, the electric vehicle driving permission screen shown in FIG. 17 is displayed.

This electric vehicle operation permission screen is a screen for setting / releasing the interlock when driving the mobile carriage equipped with the SiCl ₄ supply device 10. When the driver selects the “permit driving” button, the mobile cart can be driven. On the other hand, when the moving carriage is stopped, the operation of the moving carriage is prohibited by selecting the “release” button on this screen.

  As described above, by enabling the driving of the electric vehicle after performing the interlock operation on the screen, it is possible to prevent the occurrence of a disaster due to an operation error of the driver.

  (8) When the driver selects the “manual (maintenance) screen” switch, the manual (maintenance) screen shown in FIG. 18 is displayed.

  When “Confirm” on the pop-up screen 73 is selected, the valve or pump displayed on the system display unit 70 can be operated alone. In other words, the valve can be opened and closed by directly touching the valve tag with a finger, and the pump can be switched between “run / stop” by directly touching the pump tag with a finger. Can be operated.

  When the manual operation is ended, when “manual release” (not shown) is selected, all valves or pumps that have been operated independently by the manual operation are returned to the initial state.

  By enabling the valve or the pump to operate independently by such a simple operation, the operation of the valve or the pump can be confirmed, and the efficiency of the maintenance work can be improved while determining whether the maintenance is necessary.

  As described above, according to the present embodiment, the following various effects can be achieved.

  (A) Since the carbonization chamber pressure can be set to a desired pressure within a short time, the efficiency of the furnace wall repair work can be improved.

  An exhaust gas control valve 22 is provided in the middle of the exhaust gas duct 18 and the flow of the exhaust gas is controlled to control the rise and fall of the pressure in the carbonization chamber. Further, by providing the inert gas control valve 27 at the tail end of the exhaust gas duct 18, the pressure in the carbonization chamber can be quickly raised to a positive pressure.

That is, before the supply of the SiCl ₄ -containing gas, the exhaust gas control valve 22 is “closed” and the inert gas input control valve 27 is “open”. The inert gas flows into the carbonization chamber through the exhaust gas duct 18, the pressure in the carbonization chamber rises, and a positive pressure optimum for quickly supplying the SiCl ₄ -containing gas can be obtained.

Further, when the SiCl ₄ supply process is interrupted and the pressure holding / verifying process is completed, the exhaust gas control valve 22 is opened. Next, the inert gas input control valve 27 is closed. Then, the gas filled in the carbonization chamber by suction from the exhaust gas treatment facility flows into the exhaust gas treatment facility via the exhaust gas duct 18, and the pressure inside the carbonization chamber can be rapidly made negative.

  (B) By making the furnace wall repair work in the shortest possible time, it will not affect the operation (operation rate) of the coke oven.

(C) An expensive input material (SiCl ₄ ) can be used efficiently in an optimal amount.

When supplying the SiCl ₄ containing gas to the carbonization chamber, it is necessary to increase the pressure in the carbonization chamber to the target pressure value as soon as possible. The exhaust gas is processed by the exhaust gas treatment facility from the carbonization chamber via the exhaust gas duct 18. At this time, since the downstream side of the carbonization chamber (exhaust gas duct to exhaust gas treatment facility) has a negative pressure, even if the SiCl ₄ containing gas is supplied to the carbonization chamber, it immediately flows into the exhaust gas treatment facility, which does not lead to the effect of furnace wall repair.

Accordingly, the flow of the supply material (SiCl ₄ ) into the exhaust gas treatment facility causes an excessive load on the exhaust gas treatment facility and wastes expensive material (SiCl ₄ ), resulting in a large loss. According to this embodiment, since the pressure in the carbonization chamber becomes positive at an early stage, SiCl ₄ can be used efficiently.

  (D) The furnace wall repair effect can be easily distinguished.

In the present embodiment, an inert gas charging flange is provided on the furnace cover dedicated to repairing the coke oven furnace wall that shields the carbonization chamber, and a flexible hose is provided between the SiCl ₄ supply carriage 10 and the furnace cover. Connecting. In addition, a pressure gauge conduit for detecting the pressure inside the carbonization chamber is provided in the dedicated furnace lid for repair.

Then, an inert gas input control valve 27 is provided on the supply carriage side, and when the SiCl ₄ -containing gas supply process is interrupted, the inert gas input control valve 27 is opened and the inert gas is carbonized. In If the effect of repairing the furnace wall in the carbonization chamber (filling joints) has been achieved, the pressure in the carbonization chamber gradually increases, so that the effect of repairing the furnace wall in the carbonization chamber can be verified. For this reason, the driver | operator can confirm the furnace wall repair effect easily.

(E) Efficient operation can be performed in the repair work from the supply of SiCl ₄ to the carbonization chamber to the exhaust gas treatment process.

In the coke oven repair work by CVD (Chemical Vapor Phase Steam Method) according to the present embodiment, it is necessary to carry out a series of steps from the SiCl ₄ -containing gas supply process to the exhaust gas treatment process. On the other hand, since this repair work is a work for handling chemicals (SiCl ₄ ), in order to proceed safely, it is necessary to consolidate the operation control function on the SiCl ₄ supply carriage side that is the material supply source. .

  Therefore, in this embodiment, an operation support system is constructed so that a safe and efficient operation can be performed by exchanging interface signals with a remote facility (exhaust gas treatment facility or the like).

  This operation support system makes it easy to use the LCD screen to assign the time allocated to each of the repair processes, “exhaust process”, “bypass process”, “supply process”, and “holding / verification process”. Can be set. Furthermore, the operation mechanism can easily perform automatic operation and manual operation only by touching the LCD screen with a finger. Usually, the operation is performed on an automatic operation screen, and a manual operation mode that can be arbitrarily operated by an operator as necessary is also provided. In addition, since the operation screen is color-coded for lines (pipes, valves, etc.) that are actually in operation, the operation state for each process can be immediately grasped.

In this way, by integrating the operation control function into the SiCl ₄ supply cart, the progress of the process related to the furnace wall repair work can be integrated and easily grasped.

  In addition, by adopting a man-machine interface with good operability, it becomes possible to carry out the furnace wall repair work safely with a small number of people.

  Note that the present invention is not limited to the above-described embodiment as it is, and can be embodied by modifying the constituent elements without departing from the scope of the invention in the implementation stage. Further, various inventions can be formed by appropriately combining a plurality of constituent elements disclosed in the embodiment. For example, some components may be deleted from all the components shown in the embodiment. Furthermore, you may combine suitably the component covering different embodiment.

The figure which shows arrangement | positioning of the coke oven furnace wall repair apparatus with sectional drawing of a coke oven carbonization chamber. The figure which shows the structure of waste gas processing equipment. The flowchart which shows the outline operation | movement which concerns on the furnace wall repair of a coke oven. During bypass operation, the piping system diagram showing the path of the fluid in the SiCl ₄ feed device. During the supply operation, the piping system diagram showing the path of the fluid in the SiCl ₄ feed device. During dwell pressure and verification operation, piping diagram showing the path of the fluid in the SiCl ₄ feed device. The figure which shows the installation method of a pressure gauge. The figure which shows a menu screen. The figure which shows an automatic driving | operation screen. The figure which shows a pop-up screen. The figure which shows a single process screen. The figure which shows a pop-up screen. The figure which shows an operation | movement display screen. The figure which shows a setting screen. The figure which shows an alarm screen. The figure which shows an alarm log | history screen. The figure which shows an electric vehicle driving | operation permission screen. The figure which shows a manual (for maintenance) screen.

Explanation of symbols

1 ... coke oven, 10 ... SiCl ₄ feeder, 12 ... furnace roof, 13 ... pressure gauge, 15 ... furnace roof, 18 ... exhaust gas duct, 22 ... exhaust gas control valve, 27 ... inert gas control valve, 40 ... metering pump 42 ... Supply tank, 43 ... Accumulator, 45 ... Ejector, 70 ... System display unit, 71 ... Operating operation unit, 73 ... Pop-up screen, 74 ... Single process operation unit.

Claims (7)

In the method of repairing the carbonization chamber furnace wall by spraying SiCl ₄ after emptying the carbonization chamber to be repaired and sealing it,
Supplying the sprayed SiCl ₄ into the carbonization chamber;
After completion of the SiCl ₄ supplying step , an inert gas is supplied into the carbonization chamber, the pressure in the carbonization chamber is charged and held, and a pressure holding pressure for judging a repair state of the furnace wall based on the pressure in the carbonization chamber Process,
An exhaust process for exhausting the carbonization chamber;
A coke oven furnace wall repairing method, comprising: a control step of executing the supply step, the pressure holding step, and the exhaust step according to a predetermined order.   The furnace wall repair method for a coke oven according to claim 1, wherein the supplying step further comprises an inert gas supplying step for supplying the inert gas into the carbonization chamber. In the furnace wall repair device for repairing the carbonization chamber furnace wall by spraying SiCl ₄ after emptying the carbonization chamber to be repaired and sealing it,
Supply means for supplying the SiCl ₄ in spray form into the carbonization chamber;
After the supply of SiCl ₄ by the SiCl ₄ supply means is stopped , an inert gas is supplied into the carbonization chamber, the pressure in the carbonization chamber is maintained under pressure, and the repair state of the furnace wall is determined based on the pressure in the carbonization chamber. and the coercive pressure means that,
Exhaust means for exhausting the carbonization chamber;
It said supplying means, pressure holding means, coke oven furnace wall repair apparatus characterized by exhaust means and a control means for operating in a predetermined order. It said supplying means, pressure holding means, coke oven furnace wall repair apparatus according to each operating condition to claim 3, further comprising a display means for displaying by changing the color of the exhaust means. It said supplying means, pressure holding means, coke oven furnace wall repair device according to claim 3, further comprising a setting screen for setting the respective operating conditions of the exhaust means. It said supplying means, pressure holding means includes an operation screen for operating the respective operation start and stop of the exhaust means,
The furnace wall repair device for a coke oven according to claim 3 , wherein a pop-up screen with a message is displayed when an operation button on the operation screen is selected. The furnace wall repair device for a coke oven according to claim 3 , further comprising an operation screen for operating and stopping a mobile carriage equipped with the supply means.

Images