JP2008308529A - Method for building/repairing coke dry quenching facility - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method for building/repairing coke dry quenching facilities where the assembling/disassembling of a cooling tower can be performed in a short time, and further, influence on a coke oven operation is reduced, and the stop of the oven can be made the minimum. <P>SOLUTION: Regarding the method for building/repairing coke dry quenching facilities, a cooling tower in coke dry quenching facilities constructed at the oven front in a coke oven is made into a plurality of blocks obtained by being cut at a plurality of places in a height direction, and they are produced in a factory, and, at the oven front in the coke oven, the respective blocks produced in the factory are successively taken in and heaped up or successively taken away and carried out, thus the assembling/disassembling of the cooling tower body are performed. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a method for constructing and refurbishing coke dry fire extinguishing equipment, and in particular, by assembling and disassembling a cooling tower body by sequentially stacking or removing a block obtained by horizontally dividing a cooling tower into a plurality of blocks. Propose the construction and renovation methods to be performed.

  In recent years, in order to extinguish red hot coke fired from a coke oven, effective use of the amount of heat held by red hot coke and cooling of inert gas from the standpoint of pollution countermeasures, instead of the conventional wet fire extinguishing method using a fire extinguisher A dry fire extinguishing method used as a medium is adopted.

  FIG. 1 is a diagram showing an outline of a general coke dry fire extinguishing facility. In this facility, first, the red hot coke pushed out from the kiln (coking chamber) of the coke oven 1 is accommodated in the lower-opening bucket 2 loaded on the coke car, and then is wound up by the main hoisting machine 13. It is transported above the cooling tower 3 of the dry digestion equipment and charged into the pre-chamber 3c via the receiver 3d at the top of the cooling tower. Thereafter, the red hot coke charged into the cooling tower 3 gradually moves downward from the top receiver 3d through the pre-chamber 3c portion, and reaches the cooling chamber 3b portion. In such a flow, the red hot coke descending in the cooling tower (black arrow) is introduced into the cooling chamber 3b through the lower ventilator 3a and rapidly contacts the rising cooling gas flow (white arrow). To be cooled.

  And the cooled coke is discharged | emitted by the discharge | emission apparatus (not shown) provided in the bottom part of the ventilator 3a to the lower part outside a tower. On the other hand, the gas heated to high temperature by exchanging heat with red hot coke is sucked into the annular flue 3e and sent to a dust remover (not shown) and a waste heat boiler (not shown) through the exhaust duct 4 for heat exchange. Then, it is again introduced into the cooling chamber 3b.

  The pre-chamber 3c is provided with an annular flue 3e through the partition wall 5 so as to go around the outer periphery of the pre-chamber 3c, and is open to the upper part of the cooling chamber 3b. By adopting such a structure, the heat of the red hot coke can be effectively recovered through the annular flue 3e in the dry fire extinguishing equipment as compared with the case of wet fire extinguishing.

By the way, when the cooling tower 3 is aged, the internal refractory lining 6 may be damaged, and it may be necessary to periodically repair, in particular, repair. New construction is needed to increase capacity. In this case, conventionally, as disclosed in Patent Documents 1 and 2, mainly, apart from partial repair of the refractory lining, the entire cooling tower 3 is dismantled and removed in front of the coke oven, For new construction, it is usual to construct the entire cooling tower 3 locally, that is, in front of the coke oven.
JP 7-33245 A JP 62-143993 A

  In order to dismantle and reconstruct the conventional coke dry fire extinguishing equipment described above, particularly the cooling tower 3 and the hoisting machine 13, all of the cutting and removal of the iron skin, the welding assembly, and the refractory lining work are performed in the coke oven. It is usually performed in front of the furnace on a large scale and over a long period of time, and at least all of the plurality of coke ovens in the vicinity of the cooling tower 3 and the hoisting machine 13 must be stopped for a long period of time. There was a problem. Therefore, during the suspension period, there will be a problem that the recovery of coke oven gas will be reduced, and it will be forced to work in a narrow space in front of the furnace (height restriction by piping etc.), causing safety problems, There was a problem that work efficiency was remarkably lowered, and it was inevitable that repair (repair) would be prolonged.

  It is an object of the present invention to provide a coke dry fire extinguishing equipment that can assemble and disassemble a cooling tower and a hoisting machine in a short period of time and that has little influence on the operation of the coke oven and can minimize the outage of the furnace. It is to propose a method of construction and renovation.

  As a method of achieving the above object by overcoming the above-mentioned problems of the prior art, the inventors have blocked the cooling tower and reduced the part of work on site (in front of the coke oven). Most of the work was done at the manufacturing plant, and the block method was studied to simplify the construction and demolition work at the site (in front of the coke oven). As a result, when such a block construction method was adopted, it was found that the work period could be shortened and the cost could be reduced, and the present invention was developed.

  That is, the present invention relates to a coke oven that is constructed in front of a coke oven, and a cooling tower of a coke dry-type fire extinguishing facility is made into a plurality of blocks obtained by cutting at a plurality of locations in the height direction. In front of the furnace, the cooling tower main body is assembled and dismantled by sequentially taking in the blocks manufactured in the factory, stacking them, or removing them in order and carrying them out. This is a method for construction and renovation of fire extinguishing equipment.

In the present invention, in addition to the above configuration,
(1) The block is composed of a ventilator, a cooling chamber, a pre-chamber and a receiver in order from the bottom.
(2) Each of the cooling chamber and the pre-chamber has a refractory lining inside thereof,
(3) In assembling the cooling tower, after carrying out the welding connection between the preceding block and the succeeding block, carrying in the next succeeding block and performing the welding connection;
(4) In dismantling the cooling tower, after carrying out fusing separation of only the block to be removed and carrying it out, fusing and separating the next block to be removed,
Adopting one or more of these provides a more preferable solution.

According to the construction and refurbishment method of the coke dry fire extinguishing equipment according to the present invention having the above-described configuration, the following effects can be expected.
(1) The cooling tower is divided into a plurality of blocks, for example, a ventilator, a cooling chamber, a pre-chamber, and a receiver from the bottom, and these are manufactured in advance in a factory separate from the coke oven, and then these blocks are coke. The construction and renovation site (in front of the coke oven) of the dry fire extinguishing equipment was carried in, and at that site, only the assembly of each block was mainly performed, so the site construction period could be greatly reduced. it can.
(2) Since there is little work on site and it is completed in a short period of time, the operation of the coke oven, especially the shutdown of the kiln, can be minimized, contributing to the improvement of coke productivity and cost reduction, as well as the amount of coke oven gas generated. Reduction can be suppressed.
(3) Since the above and below attachment rods and work hoisting machines are installed for carrying in, carrying out, assembling and dismantling of the blocks, simple construction and repair work can be performed.

  Due to these effects, according to the present invention, the construction of a coke dry fire extinguishing system with a fire extinguishing capacity of 170 tons / h and an equipment weight of about 6500 tons is about 10 months, and if the existing equipment is refurbished with about 3 months, about 3 months It can be completed in a short period of time.

  Hereinafter, an example of a construction method (construction) at the time of refurbishing the coke dry fire extinguishing equipment according to the present invention, particularly at the time of assembling a cooling tower, will be described according to the above-mentioned block construction method proposed by the inventors. However, the present invention is not limited to the specific examples described below, and can be used for construction work at the time of repair.

  FIG. 2 shows a pattern of the renovation work from the initial stage of the cooling tower 3, that is, from the first stage to the second stage. In carrying out this construction, in addition to the permanent support rod 9 that supports the cooling tower 3, if necessary, a temporary sub-installation rod 10 that is extended to the anti-coke oven 1 side of the support rod 9 and An upper attachment rod 11 as shown in FIG. 3 is provided, and a work hoisting machine, a lift jack, etc., which will be described later, are also installed.

  First, the lowermost funnel-shaped ventilator 3a is carried on the existing or newly installed caisson 8 consisting of a set of four using a transfer carriage or the like and suspended by the main hoisting machine 13 to support the work. This is fixedly installed via 8a. As shown in FIG. 1, the ventilator 3a is a part that plays a role of introducing a cooling inert gas necessary for dry-cooling red hot coke and feeding it to the cooling chamber 3b or the like.

  The next stage is a step of stacking a ring-shaped cooling chamber 3b on the ventilator 3a. For this step, as described above, an underlaying rod 10 for construction is installed on the support rod 9 in a continuous state on the anti-coke oven side. A transfer carriage 12 is movably disposed on the rail 10a on the undercarriage 10. On the transfer carriage 12 that moves on the undercarriage 10, the cooling chamber 3 b that is carried in as in the example of FIG. 3 is placed. Then, the cooling chamber 3b is transferred together with the transfer carriage 12 onto the ventilator 3a in the support rod 9 and suspended upward by the main hoisting machine 13 for carrying the bucket 2, while the transfer carriage 12 The latter is retracted to a position 12 'on the side of the illustrated coke oven 1, and then stacked on the ventilator 3a while being centered, and then the outer peripheral iron skin is welded and joined.

  In this cooling chamber 3b, the red hot coke is rapidly dry-cooled by the cooling gas rising from the ventilator 3a. For this purpose, the refractory lining 6 made of refractory bricks is applied at the time of factory production prior to carrying in so as to withstand the temperature of the red hot coke. As can be seen from the above, the construction method of the present invention also eliminates the need for on-site furnace construction, so that the construction period can be greatly shortened.

  As described above, when the assembling work of the ventilator 3a and the cooling chamber 3b is completed, the prechamber 3c and the receiver 3d serving as the inlet for the red hot coke are stacked on the cooling chamber 3b. The final assembly of this stage is illustrated in FIG.

  As shown in FIG. 3, in order to perform the work of this step, an upper attachment rod 11 is separately installed on the lower attachment rod 10, and a work hoisting machine 14 is further provided on the upper attachment rod 11. Is movably disposed. As shown in the drawing, for the operation at this stage, the prechamber 3c body provided with the annular flue 3e and the cone-shaped top 3c ′ can be carried separately, and the entire prechamber 3c It may be carried in as a block, and the present invention may be any case. In the following, an example in which the cone-shaped top 3c 'is combined with the receiver 3d and separated from the main body of the pre-chamber 3c will be described in accordance with the illustration.

  In the illustrated example, the main body of the pre-chamber 3c is suspended and carried by the work hoisting machine 14 into the upper attachment rod 11, and is temporarily retracted backward. Next, the assembled composite block of the cone-shaped top 3c ′ and the receiver 3d is suspended and carried by a work hoisting machine, and at the same time, it is placed on the plastic chamber 3c main body that has been carried in advance, and these Are assembled and fixed to each other by welding. Then, the pre-chamber 3c and the receiver 3d after the assembly are integrated and transferred into the support rod 9 by using the transfer carriage 12 and the main hoisting machine 13, and then fixed to the cooling chamber 3b by welding. Then, the cooling tower 3 is assembled. Note that the work hoisting machine 14 may be utilized as the work hoisting machine 14 by using the main hoisting machine 13 as it is and moving it to the upper attachment rod 11.

  As a working method at this stage of the present invention, assembling may be performed by the following method in addition to the above example. That is, as another embodiment, first, the pre-chamber 3c main body is suspended and carried by the work hoisting machine 14 in the upper attachment rod 11, and is retracted backward 12 'by the transfer carriage 12. Next, the cone-shaped top portion 3c ′ and the receiver 3d are simultaneously carried by the work hoisting machine 14, placed on the transfer carriage 12 on the undercarriage rod 10, and transferred into the support rod 9. Then, the main hoisting machine 14 is used to wind it up and suspend it. In this state, the pre-chamber body 3c that has been retracted rearward is carried at a predetermined position in the support rod 9 using the transfer carriage 12, and stacked and welded and fixed on the cooling chamber 3b while centering.

  Thereafter, the assembly block of the cone-shaped top 3c 'and the receiver 3d retracted upward is suspended on the pre-chamber 3c, and the assembly of the cooling tower 3 is completed by joining the refractory lining of the iron skin welded lining.

  After these series of operations are completed, the upper / lower attachment rods 10 and 11 are removed together with the transfer carriage 12 and the work hoisting machine 14 to complete the construction work.

  The pre-chamber 3c is provided with an annular flue 3e communicating with the exhaust duct 4 described above on the outer periphery thereof. From the annular flue 3e, a high-temperature inert gas generated by heat exchange with the red hot coke during the operation of the cooling tower 3 is sucked and passed through the exhaust duct 4 to a heat exchanger (not shown) of the exhaust heat recovery facility. Discharged.

  Although the disclosure is omitted, driving of the transfer carriage 12 that moves on the attachment rods 10 and 11 mainly uses the main hoisting machine 13, but an auxiliary winch or the like is installed on the attachment rod 10 and pulled. You may replace with the method of doing. Further, a lift-up jack may be used for placing the blocks 3a to 3d on the transfer carriage 12. Furthermore, the main hoisting machine 13 can be used as it is as the hoisting machine for the bucket 2 after construction and repair, and unnecessary equipment costs can be reduced.

  Moreover, although the above-mentioned example is description of each block 3a-3d dismantling or a new assembly process, when disassembling for repair of the cooling tower 3, each block (3a-3d) is taken from the top. In turn, after the fusing separation of the block, the fusing separation and removal / removal are repeated in a process completely opposite to the assembly process, so that the work can be completed in a short time while minimizing the impact on the coke oven operation. it can. All the preparations for construction in front of the coke oven, that is, the production of each block, are performed at the production plant.

  In addition, the repair work of the coke dry fire extinguishing equipment has conventionally been carried out continuously day and night by arranging dozens of welding workers around the cooling tower 3. On the other hand, according to the method of the present invention, since this work is reduced, the accuracy of construction and repair is improved.

  The construction and refurbishment method of the coke dry fire extinguishing equipment according to the present invention can be used as a renovation technique in a technical field having basically the same configuration as the above example.

It is a fragmentary sectional view of a coke dry fire extinguishing equipment. It is a basic diagram which shows the state of the operation | work of the 1st step of this invention block construction method. It is a basic diagram which shows the state of the operation | work of the 2nd and 3rd step of this invention block construction method.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Coke oven 2 Bucket 3 Cooling tower 3a Ventilator 3b Cooling chamber 3c Pre-chamber 3c 'Cone top part 3d Receiver 3e Annular flue 4 Exhaust duct 5 Partition wall 6 Fireproof lining 8 Caisson 8a Supporting work 9 Supporting rod 10 Attached rod 10a Rail 12 Transfer carriage 13 Main hoisting machine 14 Working hoisting machine

Claims (5)

The cooling tower of the coke dry fire extinguishing equipment built in front of the coke oven is made into a plurality of blocks obtained by cutting at multiple locations in the height direction, and this is manufactured in the factory. In front of the coke oven, Construction and refurbishment of coke dry fire extinguishing equipment characterized in that the cooling tower body is assembled and dismantled by sequentially taking in each block produced at the factory and stacking or sequentially removing and carrying it out. Method. The method for constructing and refurbishing a coke dry fire extinguishing system according to claim 1, wherein the block includes a ventilator, a cooling chamber, a pre-chamber, and a receiver in order from the bottom. The method for construction and refurbishment of coke dry fire extinguishing equipment according to claim 1, wherein the cooling chamber and the pre-chamber each have a fireproof lining inside thereof. 2. The coke dry fire extinguishing system according to claim 1, wherein, when the cooling tower is assembled, after the preceding block and the succeeding block are welded, the next succeeding block is carried in and welded. Construction and renovation methods. When disassembling the cooling tower, after carrying out the fusing separation of only the blocks to be removed and carrying out the fusing separation of the next to-be-removed blocks, the construction of the coke dry fire extinguishing equipment according to claim 2, Refurbishment method.

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