JP5983548B2 - How to update the coke oven - Google Patents

Description

  The present invention relates to a method for renewing a coke oven in which carbonization chambers and combustion chambers are alternately arranged in the direction of the furnace group.

  FIG. 11 shows a schematic configuration of a coke oven (for example, Patent Document 1). The coke oven shown in FIG. 11 is alternately arranged in the upper part of the heat storage chamber 1 so that the carbonization chamber 2 and the combustion chamber 3 are horizontally long in the direction of the furnace group. The coal stored in the charcoal tank 4 is charged into the carbonization chamber 2 from a charcoal vehicle 6 running on a track 5 disposed on the top of the coke oven. Then, the coal charged into the carbonization chamber 2 from the coal-coating vehicle 6 is dry-distilled by the heat generated in the combustion chamber 3 to be coke. When coke is generated in the carbonization chamber 2, the extruder 7 opens the furnace lids installed at the kilns on both sides in the furnace length direction of the carbonization chamber 2, and the extruder 7 removes the coke from the carbonization chamber 2 on the machine side. Push out from the MS kiln to the coke side CS kiln and discharge.

  The coke pushed to the coke side CS kiln of the carbonization chamber 2 is discharged to the receiving container 9a of the coke receiving carriage 9 via the guide wheel 8, and the coke discharged to the receiving container 9a ( The red hot coke) is conveyed to a cooling facility, for example, CDQ11 (coke dry fire extinguishing facility). The guide wheel 8 travels on a track (not shown) disposed on the platform 10 and moves to a kiln opening of a predetermined carbonization chamber 2 where coke is pushed out.

FIG. 12 shows a part of the carbonization chambers 2 and the combustion chambers 3 arranged alternately in the furnace group direction in a plan view, and the brick walls 12 forming the combustion chambers 3 are erected by MS. The two MS back stays 14a and 14b and the two CS back stays 15a and 15b provided upright at the coke side CS are supported by the furnace body 13.
The furnace body hardware 13 includes a door frame 13a that forms a furnace opening (a furnace opening of the machine side MS, a furnace opening of the coke side CS) 2a of the carbonization chamber 2, a tension ledge 13b that holds down the brick wall 12, a flash plate 13c, a head It consists of a plate 13d and the like.

  By the way, if the coke oven is operated for a period exceeding 20 to 30 years and repeatedly subjected to dry distillation and discharge, the brick wall 12 forming the combustion chamber 3 is worn out. For this reason, the renewal work which removes the worn brick wall 12 and the back stays 14a, 14b, 15a and 15b, forms a new brick wall 12, and stands a new back stay is performed.

  The demolition work of the worn brick wall 12 and the removal work of the backstays 15a and 15b were performed as follows. First, for example, a dismantling construction machine is installed in an MS work yard, and the MS backstays 14a and 14b and the furnace body 13 of the machine side MS are dismantled by the dismantling construction machine. Next, the worn brick wall 12 is demolished from the MS toward the CS with a dismantling construction machine. The demolished brick wall 12 is transferred to the unloading means waiting in the work yard of the machine side MS, and is unloaded to another place by the unloading means. Then, after the dismantling / unloading of the brick wall 12 is completed, the back stays 15a, 15b of the coke side CS are removed one by one.

JP 2012-140569 A

By the way, although the brick wall 12 of the coke side CS is supported by the CS back stays 15a and 15b and the furnace body 13, the kiln port 2a of the coke side CS is opened by the door frame 13a of the furnace body 13. Therefore, there is a possibility that brick scraps of the brick wall 12 disassembled by the dismantling construction machine may fall from the coke side CS kiln 2a to the platform 10 side.
For this reason, when the brick wall 12 is being dismantled, there is a problem in terms of safety of workers working near the kiln 2a of the coke side CS.
Further, after the brick wall 12 is dismantled, it is necessary to remove the brick waste that has accumulated on the track on the platform 10.

Further, after dismantling the brick wall 12, the back stays 15a and 15b of the coke side CS have to be removed one by one, which has a problem in terms of efficiency of the back stay removal work.
Therefore, the present invention has been made paying attention to the unsolved problems of the above-described conventional example, and it is possible to dismantle the brick wall while improving the safety of workers working around the coke oven. An object of the present invention is to provide a method for renewing a coke oven that can efficiently perform a brick wall dismantling operation and a backstay removal operation.

In order to achieve the above object, a method for renewing a coke oven according to one aspect of the present invention is to provide a brick wall of a combustion chamber to be renewed in a coke oven in which carbonization chambers and combustion chambers are alternately arranged in the furnace group direction. When disassembling, disassembling machine is disposed on one side of the coke oven machine side and coke side, and the machine side near the combustion chamber to be updated and the other side of the coke side are opened. after closing the opening portion, such as kiln inlet of the coking chamber at the protective wall, by the demolition machine, together with the brick wall of the combustion chamber to be the update will be dismantled toward the other side from the one side A pair of back stays are provided on the side wall of the other side so as to be spaced apart from each other in the direction of the furnace group, and support the brick wall via a furnace body hardware. An update process of the coke oven, characterized by closing the opening portion by fixing the protective barrier backstay.

The coke oven renewal method according to one aspect of the present invention includes a pair of back stays, a web extending outward from the side wall, and a flange that extends perpendicularly to an outer end of the web. The protective wall is composed of a plurality of divided wall units, and each wall unit is suspended by a suspending means and surrounded by the flange and the web of the pair of backstays. It is preferable to insert it into the space and move it up and down to a predetermined height, and then fix it to the flange.

Further, in the coke oven renewal method according to one aspect of the present invention, the wall unit is temporarily fixed by temporary fixing means so as to contact the inside of the flanges of the pair of backstays, and then the wall unit is welded. It is preferable to fix to the pair of backstays.
Furthermore, in the method for renewing a coke oven according to one aspect of the present invention, a cut is made in the lower part of all the backstays fixing the protective wall, and the direction of falling with respect to a specific backstay along the cuts It is preferable to apply an external force to.

  According to the method for disassembling a coke oven according to the present invention, when the brick wall of the combustion chamber to be renewed is dismantled, the other side where the opening was present is blocked by the protective wall. The brick wall of the combustion chamber to be renewed can be dismantled while improving the safety of the worker who is performing the work, and the brick wall dismantling work can be efficiently performed.

It is a figure which shows the state which has disassembled the backstay of one side in the update method of the coke oven which concerns on this invention. It is a figure which shows the opening part of the other side of a coke oven. It is the figure which showed the update method of the coke oven which concerns on this invention from the other side. It is a figure which shows the state which the wall unit which concerns on this invention moves up and down. It is a figure which shows the state which the wall unit which concerns on this invention is contact | abutting to the flange of a backstay. It is a figure which shows the state just before the wall unit which concerns on this invention is temporarily fixed to the flange of a backstay. It is a figure which shows the state by which the wall unit which concerns on this invention is temporarily fixed to the flange of a backstay. It is a figure which shows the state by which the opening part of the other side of the coke oven was obstruct | occluded with the protective wall. It is a figure which shows the state by which the brick wall of the combustion chamber which should be updated is demolished. It is a figure which shows the state in which the backstay of the other side is fallen at once after the brick wall of a combustion chamber is demolished. It is a figure which shows the external appearance of a coke oven. It is sectional drawing which shows the carbonization chamber and combustion chamber which are alternately arrange | positioned in the furnace group direction.

DESCRIPTION OF EMBODIMENTS Hereinafter, modes for carrying out the present invention (hereinafter referred to as embodiments) will be described in detail with reference to the drawings. In addition, the same code | symbol is attached | subjected to the same component as the structure shown in FIG.11 and FIG.12, and description is abbreviate | omitted.
An embodiment of a coke oven renewal method according to the present invention will be described.
In the coke oven renewal method of the present embodiment, first, as shown in FIG. 1, a demolition machine 20 is installed on the machine side MS of the coke oven. Next, the MS backstays 14a and 14b and the furnace body hardware 13 (not shown) supporting the brick wall 12 of the combustion chamber 3 to be updated are disassembled using the dismantling machine 20.

FIG. 2 is a view showing the combustion chamber 3 and the carbonization chamber 2 to be renewed from the coke side CS, and the carbonization chamber 2 from which a furnace lid (not shown) is removed is provided with a kiln opening 2a.
In this embodiment, after disassembling the MS backstays 14a and 14b as shown in FIG. 1, the wall unit 21 suspended and held by the dismantling machine 20 is moved up and down to a predetermined position as shown in FIG. A protective wall that closes the kiln port 2a by fixing it to two CS backstays 15a and 15b that are erected apart from each other in the direction, and arranging a plurality of wall units 21 in a vertical line. (PW in FIG. 8) is formed.

As shown in FIG. 4, the CS back stay 15a is a H-shaped steel having a pair of flanges f1 and f2 and a web w between them, and the CS back stay 15b is also an H-shaped steel having the same structure. .
As shown in FIG. 2, the wall unit 21 is a unit body having a rectangular shape when viewed from the front. The dimension of the wall unit 21 in the short direction is based on the distance between the webs w of the two CS backstays 15a and 15b. It is set to a slightly smaller length.

2 and 3, the wall unit 21 is a rectangular unit body. A suspension hook portion 22 is formed on the upper end surface of the wall unit 21, and a wire 23 suspended from the demolition machine 20 on the suspension hook portion 22. Is suspended and held. A plurality of cotter engagement members 24 project from one side surface of the large area of the wall unit 21.
As shown in FIG. 3, the cotter engagement member 24 has a wire locking hole 26 for locking the pulling wire 25 formed on the distal end side of the plate-like member, and on the proximal end side of the plate-like member. A cotter slit 27 having a long axis extending toward the tip is formed.

Here, a specific procedure for fixing the wall unit 21 to the CS backstays 15a and 15b will be described with reference to FIGS.
First, as shown in FIG. 3, a scaffold 28 is constructed on the platform 10 in the vicinity of the combustion chamber 3 to be updated.
Next, the wall unit 21 suspended from the dismantling machine 20 via the wire 23 is inserted between the two CS backstays 15a and 15b. Then, as shown in FIGS. 3 and 4, the wall unit 21 is lowered while being guided by the webs w of the two CS backstays 15a and 15b.

Next, as shown in FIGS. 3 and 5, the worker waiting on the scaffold 28 pulls the pulling wire 25 connected to the cotter engaging member 24 of the lowered wall unit 21. The wall unit 21 pulled by the pulling wire 25 comes into contact with the inside of the flange f2 located outside the two CS backstays 15a and 15b.
Next, as shown in FIG. 6A, a fixing plate 29 that engages with the cotter engagement member 24 of the wall unit 21 is attached to the outside of the flange f2 of the CS backstays 15a and 15b. As shown in FIG. 6B, the fixing plate 29 is a plate material in which slits 29a are formed, and the cotter engaging member of the wall unit 21 in contact with the flanges f2 of the two CS backstays 15a and 15b. The fixing plate 29 is mounted from below so that the slits 29a are fitted in 24.

Next, as shown in FIG. 7, a wedge-shaped cotter 30 is inserted into a cotter slit 27 (see FIG. 3) formed in the cotter engagement member 24. Thereby, the wall unit 21 is temporarily fixed in the state contact | abutted to the flange f2 of the two CS backstays 15a and 15b.
Next, the wall unit 21 is fixed to the two CS back stays 15a and 15b by welding the cotter engaging member 24 and the cotter 30, and the fixing plate 29 and the flange f2 of the CS back stays 15a and 15b.

Such fixing of the wall unit 21 to the CS backstays 15a and 15b shown in FIGS. 3 to 7 in a row in the furnace height direction with respect to the other wall units 21 is shown in FIG. Thus, the protective wall PW which closes the kiln 2a is formed.
Next, as shown in FIG. 9, the present embodiment uses the dismantling machine 20 to dismantle the brick wall 12 from the machine side MS side. In the dismantling work of the brick wall 12, the brick waste carried out from the combustion chamber 3 is transferred to the truck TR waiting in the work yard of the machine side MS and carried out to another place.

Then, after the disassembly work of the brick wall 12 of the combustion chamber 3 to be updated is completed, the CS backstays 15a and 15b are removed as shown in FIG.
In the removal work of the CS back stays 15a and 15b, first, a cut (not shown) is made in the lower part of all the CS back stays 15a and 15b. Further, a wire 31 is hung on the upper part of the specific CS backstays 15a, 15b, and this wire 31 is extended to the machine side MS and pulled by the heavy machine 32. Then, an external force is applied to the CS back stays 15a and 15b by the arm of the dismantling machine 20 in a direction toward the machine side MS.

All the CS backstays 15a and 15b are integrated through a protective wall PW (a plurality of wall units 21).
When an external force in the direction toward the machine side MS is applied to the dismantling machine 20 and pulled by the heavy machine 32 via the wire 31, all the integrated CS backstays 15a and 15b It falls down at the same time.

  Here, one side according to the present invention corresponds to the machine side MS, the other side according to the present invention corresponds to the coke side CS, and the steel material of the present invention corresponds to H-section steel. The temporary fixing means of the present invention corresponds to the cotter engaging member 24 of the wall unit 21, the cotter slit 27, the fixing plate 29 and the cotter 30 formed in the cotter engaging member 24.

  Therefore, in the coke oven renewal method of the present embodiment, when the brick wall 12 of the combustion chamber 3 to be renewed is dismantled, the coke side CS where the opening (the kiln 2a) was present is removed by the protective wall PW. Since it is blocked, the brick waste generated when the brick wall 12 is dismantled does not fall into the coke side CS, and the safety of workers working near the platform of the coke side CS can be ensured. In addition, after the brick wall 12 is dismantled, brick waste does not accumulate on the track on the platform 10, and the brick waste removal work becomes unnecessary.

Further, the protective wall PW is composed of a plurality of wall units 21, and the wall units 21 are moved by being lowered while being guided by the webs w of the two CS backstays 15a and 15b. Since the protective wall PW can be formed efficiently, the wedge-shaped cotter 30 is inserted into the cotter slit 27 of the cotter engagement member 24 provided in the wall unit 21. Since the wall unit 21 is temporarily fixed in contact with the flanges f2 of the two CS back stays 15a and 15b, the wall unit 21 can be easily fixed to the CS back stays 15a and 15b by welding. it can.

  Furthermore, after the dismantling work of the brick wall 12 of the combustion chamber 3 to be updated is completed, a cut is made in the lower part of all the CS back stays 15a and 15b, and an external force is applied in the direction of falling with respect to the specific CS back stays 15a and 15b. In addition, since all CS backstays 15a and 15b are integrated via the protective wall PW (multiple wall units 21), they fall down at the same time, and the backstays 15a and 15b are efficiently removed. can do.

  DESCRIPTION OF SYMBOLS 1 ... Thermal storage chamber, 2 ... Carbonization chamber, 2a ... Kiln opening, 3 ... Combustion chamber, 10 ... Platform, 12 ... Brick wall, 13 ... Furnace body hardware, 14a, 14b, 15a, 15b ... Backstay, 20 ... Demolition machine , 21 ... wall unit, 24 ... cotter engagement member, 27 ... cotter slit, 28 ... scaffold, 30 ... cotter, 32 ... heavy machinery, f1, f2 ... flange, w ... web, CS ... coke side, MS ... machine side , PW ... Protective wall

Claims (4)

When dismantling the brick wall of the combustion chamber to be renewed in a coke oven in which carbonization chambers and combustion chambers are alternately arranged in the furnace group direction,
Disposing a dismantling machine on one side of the coke oven machine side and coke side;
After closing an opening portion such as a kiln opening of the carbonization chamber opened on the other side of the machine side and the coke side in the vicinity of the combustion chamber to be updated with a protective wall,
While dismantling the brick wall of the combustion chamber to be updated from the one side toward the other side by the demolition machine ,
On the other side wall, a pair of back stays are arranged to be spaced apart from each other in the furnace group direction and support the brick wall via a furnace body hardware. A method for renewing a coke oven , wherein the opening is closed by fixing a protective wall . The pair of backstays is a steel material having a web extending outward from the side wall and a flange extending perpendicular to the outer end of the web,
The protective wall is composed of a plurality of divided wall units,
Each wall unit is suspended by a suspension means, inserted into the space surrounded by the flange and the web of the pair of backstays, moved up and down to a predetermined height position, and then fixed to the flange. The coke oven renewal method according to claim 1. 3. The wall unit is fixed to the pair of back stays by welding after temporarily fixing the wall unit so as to contact the inside of the flange of the pair of back stays by temporary fixing means. How to update the described coke oven. Scored at the bottom of all of said backstay securing the protective wall, one of claims 1 to 3, characterized in that an external force is applied in a tilting direction with respect to a particular backstay along the cut updating method coke oven according to any one of claims.

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