JP6270610B2 - Coke oven furnace combustion gas supply device - Google Patents

Description

  The present invention relates to a combustion gas supply apparatus for a coke oven furnace lid, which is formed in a furnace lid installed at both side openings of each carbonization chamber of a coke oven and supplies combustion gas to a gas passage communicating with the carbonization chamber.

  Normally, a coke oven has a heat storage chamber at the lower part of the furnace body, and combustion chambers and carbonization chambers are alternately arranged at the upper part, and coal is charged from an inlet provided at the upper part of the carbonization chamber. The coal is then carbonized in the carbonization chamber (furnace) by heat transfer from the combustion chamber to produce coke. When the carbonization of the coal charged in the carbonization chamber is completed, the furnace lids installed at the openings on both sides of each carbonization chamber are opened. Next, the coke in the carbonization chamber is discharged from the opening on the other side by an extruder disposed on the opening on one side, and is collected into a bucket for a coke dry fire extinguishing equipment (CDQ) or a fire extinguisher via a guide wheel. .

  Thus, in the coke oven, the furnace lid is opened each time the coke is discharged, and the furnace lid is exposed to the outside air even during dry distillation, so that heat dissipation is increased particularly in the vicinity of both side openings of the carbonization chamber. Therefore, in the vicinity of the opening on both sides of the carbonization chamber, it is inevitable that dry distillation (coking) is delayed from the center.

  As one of countermeasures, a technique is known in which combustion gas (air or oxygen) is blown into a gas passage formed in the furnace lid in order to give the furnace lid a heating function. For example, in Patent Document 1, coke oven gas generated when carbonizing coal in a coke oven is introduced into a gas passage formed in the furnace lid, combustion gas is blown during carbonization to burn the coke oven gas, and carbonization is performed. In the method of promoting the dry distillation of coal at both side openings (kiln opening) of the chamber, there is a technique in which the combustion gas is guided from the top of the coke oven to the furnace lid and blown into the gas passage from any plural positions in the furnace height direction. It is disclosed.

  However, in the technique of Patent Document 1, it is necessary to introduce combustion gas from the outside of the furnace lid to the furnace lid, and the gas pipe for that purpose is provided every time the furnace lid is opened and closed in order to discharge coke from the carbonization chamber. It is necessary to remove the lid. For example, when there are 100 carbonization chambers and coke is discharged from each carbonization chamber every 20 hours, desorption is required on average every 12 minutes. Although the technique of Patent Document 1 employs a one-touch detachment mechanism for detaching a gas pipe, an operator operation is required for the detachment, and the labor is great.

  On the other hand, Patent Document 2 discloses a technique in which a closed valve disc is provided on an air suction pipe via a compression coil spring, and this closed valve disc is opened and closed by a self-control operation in response to a change in furnace pressure. However, in order to implement the technique of Patent Document 2, it is necessary to perform control under a very small pressure of −1 to −15 mmAq in the furnace, and therefore, the compression coil spring cannot be designed normally, and the stability of the control operation is not possible. In addition to problems, maintenance also requires effort.

JP-A-9-48773 JP 2006-63293 A

  The problem to be solved by the present invention is to supply the combustion gas to the gas passage formed in the furnace lid installed in the opening on both sides of each coking chamber of the coke oven without much effort and maintenance. An object of the present invention is to provide a technique capable of supplying a combustion gas with a simple configuration without requiring frequent operations.

  In solving the above problems, the present inventors have studied the necessity of supplying combustion air to the carbonization chamber, and as a result, the period of supplying combustion air is from the middle to the end of dry distillation where the furnace pressure is negative. It turns out that just enough. From this, the present inventors provided an on-off valve in the combustion gas supply passage for supplying combustion gas, closed the on-off valve at the initial stage of dry distillation when the furnace pressure becomes positive, and the furnace pressure became negative. The idea is that if the on-off valve is opened during the middle or final stage of dry distillation, it will be possible to supply necessary and sufficient combustion air with a simple structure. The present invention has been completed by conceiving that it is provided in a mobile machine.

  That is, according to the present invention, the combustion gas supply for the coke oven furnace lid is formed in the furnace lids installed at both side openings of each coking chamber of the coke oven and supplies the combustion gas to the gas passage communicating with the carbonization chamber. A combustion gas supply path for supplying combustion gas to the gas passage is provided in each furnace lid, and an open / close valve is provided in the combustion gas supply path. There is provided a coke oven furnace combustion gas supply device provided with valve opening / closing means for opening and closing the opening / closing valve.

  In the present invention, the valve opening / closing means may include an opening means for opening the opening / closing valve and a closing means for closing the opening / closing valve.

  According to the present invention, it is possible to supply necessary and sufficient combustion air with a simple configuration in which an opening / closing valve is provided on the furnace lid side and a valve opening / closing means is provided on the mobile machine side. That is, when supplying combustion gas to the gas passages formed in the furnace lids installed at the openings on both sides of each coking chamber of the coke oven, no effort is required and maintenance is not required frequently. Combustion gas can be supplied with a simple configuration. Further, by installing the valve opening / closing means in a moving machine (extruder and guide car) attached to the coke oven, it can be installed without much cost.

It is a top view which shows notionally the structure of the combustion gas supply apparatus by one Example of this invention. The structure of the carbonization chamber and coke oven furnace cover of the coke oven to which the combustion gas supply apparatus of FIG. 1 is applied is shown, (a) is a schematic longitudinal sectional view thereof, and (b) is a front view of the on-off valve. It is explanatory drawing which shows notionally an example of a structure of a valve opening / closing means (opening means). In the carbonization chamber of a coke oven, the change of the internal pressure (furnace internal pressure) of the carbonization chamber from the charging of coal to the discharge of coke is conceptually shown.

  Embodiments of the present invention will be described below based on examples shown in the drawings.

  FIG. 1 is a plan view conceptually showing the structure of a combustion gas supply device according to one embodiment of the present invention. FIG. 2 is a coking chamber and coke oven furnace of a coke oven to which the combustion gas supply device of FIG. 1 is applied. The structure of a lid | cover is shown, (a) is the schematic longitudinal cross-sectional view, (b) is a front view of an on-off valve.

  As described above, the coke oven has a heat storage chamber disposed in the lower portion of the furnace body, and combustion chambers and carbonization chambers are alternately arranged in the upper portion thereof. In FIG. 1, combustion chambers are omitted, and a plurality (100 in the embodiment) of carbonization chambers 10 are arranged in the length direction of the furnace group, and furnace lids 20 are installed at both side openings of the carbonization chambers 10. Yes. In addition, on both sides of the carbonization chamber 10, an extruder 30 and a guide wheel 40, which are coke oven moving machines, are arranged so as to be movable in the length direction of the furnace group. As is well known, the extruder 30 and the guide wheel 40 move in synchronization with each other in accordance with the discharge operation of the coke from the carbonization chamber 10 by the extrusion ram 31 of the extruder 30. In addition, although illustration is abbreviate | omitted, the charging vehicle (charged car) which charges coal in the carbonization chamber where coke was discharged again moves in synchronization with the extruder 30 and the guide wheel 40.

  As shown in FIG. 2A, a gas passage 21 communicating with the carbonization chamber 10 is provided in the furnace height direction on the inner side (carbonization chamber 10 side) of the furnace lid 20 installed at both side openings of each carbonization chamber 10. It is formed to stretch. Each furnace lid 20 is provided with a combustion gas supply passage 50 for supplying combustion gas (outside air) to the gas passage 21 thereof. In the embodiment, combustion gas supply passages 50 are provided at two locations in the furnace height direction, and on-off valves 60 are provided at the outer ends of the combustion gas supply passages 50. The on-off valve 60 can be a ball valve, for example, and is closed when the valve arm 61 is at the solid line position and opened when rotated to the broken line position, as shown in FIG.

  On the other hand, as shown in FIG. 1, the extruder 30 and the guide wheel 40 are provided with valve opening / closing means 70 for opening and closing the opening / closing valve 60. In the embodiment, the valve opening / closing means 60 individually includes an opening means 71 for opening the opening / closing valve 60 and a closing means 72 for closing the opening / closing valve 60.

  FIG. 3 is an explanatory diagram conceptually showing an example of the configuration of the opening means 71. The opening means 71 includes a first air cylinder 71a, a second air cylinder 71b, and a valve opening / closing arm 71c. The second air cylinder 71b is attached to the tip of the cylinder rod of the first air cylinder 71a, and moves forward and backward by driving the first air cylinder 71a. The valve opening / closing arm 71c is mounted on the second air cylinder 71b, and rotates in the vertical direction by driving the second air cylinder 71b.

  The opening operation of the on-off valve 60 by the opening means 71 is as follows. First, the first air cylinder 71a is driven from the initial position of FIG. 3A to advance the second air cylinder 71b and the valve opening / closing arm 71c, and the tip of the valve opening / closing arm 71c is hooked on the valve arm 61 of the opening / closing valve 60. . In this state, the second air cylinder 71b is driven to rotate the valve opening / closing arm 71c upward as shown in FIG. Thereby, the on-off valve 60 is opened. Thereafter, the first air cylinder 71a and the second air cylinder 71b are driven to return to the initial positions in FIG.

  On the other hand, although detailed description of the closing means 72 is omitted, it is obvious to those skilled in the art that the on-off valve 60 can be closed by the same configuration as the opening means 71 shown in FIG. In addition, the compressed air which becomes a drive source of these opening means 71 and the closing means 72 is supplied from the drive source 73 shown in FIG.

  Next, the operation of the combustion gas supply apparatus of this embodiment will be described.

  FIG. 4 conceptually shows changes in the internal pressure (furnace pressure) of the coking chamber in the coking chamber of the coke oven from the charging of the coal to the discharging of the coke (20 hours in the example). As shown in the figure, at the initial stage of dry distillation, the amount of gas generated is large and the pressure inside the furnace becomes positive, but the gas inside the furnace is forcibly discharged out of the furnace from the ascending pipe 11 of the coke oven (see FIG. 2), Since the amount of gas generation decreases in the middle or end of dry distillation, the furnace pressure becomes negative in the middle or end of dry distillation.

  In the present invention, the gas for combustion (outside air) is supplied to the carbonization chamber 10 by utilizing the negative pressure by opening the on-off valve 60 in the middle or end of the dry distillation where the pressure in the furnace is negative. Then, after the dry distillation is finished and the coke is discharged, the on-off valve 60 is closed before the next coal is charged. This prevents the in-furnace gas from being blown out at the initial stage of dry distillation when the in-furnace pressure becomes positive. The opening / closing timing of these on-off valves 60 may be set as appropriate according to the operation pattern of the coke oven. In short, for each carbonization chamber, it is only necessary to maintain a cycle in which the on-off valve 60 is opened in the middle or end of dry distillation and the on-off valve 60 is closed before the next coal is charged. What is necessary is just to set the movement pattern of a moving machine (the extruder 30 and the guide wheel 40).

  In the above embodiment, the valve opening / closing means of the present invention is provided in the original extruder 30 and guide wheel 40 as a coke oven moving machine. However, as another application example, the coke oven moving machine includes an extruder and a guide. It is also possible to provide each moving carriage that moves in synchronization with the vehicle, and to provide a valve opening / closing mechanism for these moving carriages. This moving carriage is also a “coke oven moving machine” in the present invention.

  Further, in the embodiment, as the valve opening / closing means 70, an opening means 71 for opening the opening / closing valve 60 and a closing means 72 for closing the opening / closing valve 60 are provided separately, and by these opening means 71 and closing means 72, The open / close valve 60 of the carbonization chamber 10 arranged in parallel in the furnace length direction is opened and closed at the same timing. However, the opening means 71 and the closing means 72 are integrated into a single valve opening / closing means 70, and this valve opening / closing means is used as a furnace. The on-off valve 60 of each carbonization chamber 10 can be opened and closed so as to be movable in the long direction. In the embodiment, a mechanism using an air cylinder is used as the opening means 71 and the closing means 72. However, it is obvious to those skilled in the art that various other mechanisms can be used as the mechanism for opening and closing the on-off valve 60. .

DESCRIPTION OF SYMBOLS 10 Carbonization chamber 11 Climbing pipe 20 Furnace lid 21 Gas passage 30 Extruder (moving machine of coke oven)
31 Extrusion ram 40 Guide car (coke oven moving machine)
50 Combustion gas supply path 60 Opening / closing valve 61 Valve arm 70 Valve opening / closing means 71 Opening means 71a First air cylinder 71b Second air cylinder 71c Valve opening / closing arm

Claims (2)

A combustion gas supply device for a coke oven lid that is formed in a furnace lid installed at both side openings of each coking chamber of a coke oven and supplies a combustion gas to a gas passage communicating with the carbonization chamber,
Each furnace lid is provided with a combustion gas supply passage for supplying combustion gas to the gas passage, and an open / close valve is provided in the combustion gas supply passage,
A combustion gas supply device for a coke oven furnace lid, wherein a valve opening and closing means for opening and closing the on-off valve is provided in a coke oven moving machine.   2. The coke oven furnace combustion gas supply apparatus according to claim 1, wherein the valve opening / closing means includes an opening means for opening the opening / closing valve and a closing means for closing the opening / closing valve. .