CN112481437A - Blast furnace Y-shaped downcomer dismounting and replacing method - Google Patents
Blast furnace Y-shaped downcomer dismounting and replacing method Download PDFInfo
- Publication number
- CN112481437A CN112481437A CN202011356508.7A CN202011356508A CN112481437A CN 112481437 A CN112481437 A CN 112481437A CN 202011356508 A CN202011356508 A CN 202011356508A CN 112481437 A CN112481437 A CN 112481437A
- Authority
- CN
- China
- Prior art keywords
- dismounting
- shaped
- hoisting
- hoisting equipment
- downcomer
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B7/00—Blast furnaces
- C21B7/22—Dust arresters
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
Abstract
The invention relates to a method for dismounting and replacing a Y-shaped downcomer of a blast furnace, wherein the Y-shaped downcomer comprises a first dismounting part, a second dismounting part and a third dismounting part, the first dismounting part and the second dismounting part are oppositely arranged, and one end of the first dismounting part and one end of the second dismounting part are respectively connected with the third dismounting part; the dismounting and replacing process comprises the following steps: the first hoisting equipment and the second hoisting equipment are both connected with a Y-shaped downcomer, the first dismounting part is dismounted, the second dismounting part is dismounted, the third dismounting part is dismounted, and a new Y-shaped downcomer is mounted; therefore, the Y-shaped downcomer is dismantled in sections, so that internal refractory materials are prevented from being chiseled, the working efficiency is improved, and the hoisting difficulty is reduced and adjusted; meanwhile, the first hoisting equipment and the second hoisting equipment are adopted for simultaneous hoisting, so that the stability of the Y-shaped downcomer in the dismantling process is improved; and the integral installation process of the Y-shaped descending pipe is adopted, so that the air butt welding times are reduced, and the safety risk is reduced.
Description
Technical Field
The invention relates to the technical field of blast furnace Y-shaped downcomer removal and replacement, in particular to a blast furnace Y-shaped downcomer removal and replacement method.
Background
At present, a blast furnace downcomer is a main part of a blast furnace iron-making raw gas system, the blast furnace downcomer is used for carrying out dust removal and purification on raw gas generated in blast furnace iron making through a gravity dust remover, and the removal and replacement of the blast furnace downcomer are key and difficult points of a blast furnace overhaul project.
1000m3The following blast furnace downcomer is generally a Y-shaped downcomer, the Y-shaped downcomer is arranged obliquely, the inclination angles are all more than 40 degrees, and an internal refractory material is additionally arranged inside the Y-shaped downcomer.
However, the weight of the Y-downcomer of a blast furnace makes it difficult to hoist.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a method for removing and replacing a Y-shaped downcomer of a blast furnace, which has the advantage of solving the problem of difficult hoisting when the Y-shaped downcomer of the blast furnace is removed and replaced.
The above object of the present invention is achieved by the following technical solutions: a blast furnace Y-shaped descending pipe dismantling and replacing method comprises a Y-shaped descending pipe, a first hoisting device and a second hoisting device; the first hoisting equipment and the second hoisting equipment are both connected with the Y-shaped descending pipe, and the first hoisting machine and the second hoisting machine are both used for hoisting the Y-shaped descending pipe; the Y-shaped downcomer comprises a first dismounting part, a second dismounting part and a third dismounting part, the first dismounting part and the second dismounting part are arranged oppositely, and one end of the first dismounting part and one end of the second dismounting part are respectively connected with the third dismounting part;
the dismantling and replacing method comprises the following steps:
the method comprises the following steps: respectively arranging the first hoisting equipment and the second hoisting equipment on two opposite sides of the Y-shaped downcomer, wherein the first hoisting equipment is connected with the first disassembling part/the second disassembling part, and the second hoisting equipment is connected with the third disassembling part;
step two: after the first hoisting equipment is connected with the first dismounting part, cutting two ends of the first dismounting part respectively, and hoisting the first dismounting part to the ground through the first hoisting equipment;
step three: connecting the first hoisting equipment with the second disassembling part, cutting two ends of the second disassembling part respectively, and hoisting the second disassembling part to the ground through the first hoisting equipment;
step four: connecting the first hoisting equipment with one end of the third dismounting part, which is far away from the first dismounting part, cutting one end of the third dismounting part, which is far away from the first dismounting part, and hoisting the third dismounting part to the ground through the second hoisting equipment and the first hoisting equipment;
step five: and installing a new Y-shaped downcomer.
Preferably, the method for removing and replacing the Y-shaped downcomer of the blast furnace provided by the invention further comprises the following steps: before the first step, a support frame is arranged, the support frame is arranged corresponding to the first disassembling part, the top end of the support frame abuts against the first disassembling part, and the support frame is used for supporting the first disassembling part.
Preferably, the method for removing and replacing the Y-shaped downcomer of the blast furnace provided by the invention further comprises the following steps: after the support frame is arranged and before the first step, a support is arranged, the support and the second disassembling part are correspondingly arranged, and the top end of the support abuts against the second disassembling part.
Preferably, the method for removing and replacing the Y-shaped downcomer of the blast furnace provided by the invention further comprises the following steps: after the support is arranged and before the first step, a fixing frame is arranged, the fixing frame and the third disassembling part are correspondingly arranged, and the top end of the fixing frame abuts against the third disassembling part.
Preferably, the method for removing and replacing the Y-shaped downcomer of the blast furnace provided by the invention further comprises the following steps: after the first step, before the second step, removing the inner resistant material at the cutting position of the first detaching portion, the cutting position of the second detaching portion, and the cutting position of the third detaching portion.
Preferably, the method for removing and replacing a Y-shaped downcomer of a blast furnace according to the present invention, wherein the removing of the internal refractory material comprises: the two ends of the first disassembling part are respectively provided with a first inlet and a second inlet, the two ends of the second disassembling part are respectively provided with a third inlet and a fourth inlet, one end of the third disassembling part, which deviates from the first disassembling part, is provided with a fifth inlet, and the first inlet, the second inlet, the third inlet, the fourth inlet and the fifth inlet are all used for constructors to enter the Y-shaped descending pipe to chive out the internal refractory material.
Preferably, the method for removing and replacing the Y-shaped downcomer of the blast furnace provided by the invention further comprises the following steps: after the first step, before the inner refractory is chiseled off, the Y-shaped downcomer is purged.
Preferably, in the method for removing and replacing a Y-shaped downcomer of a blast furnace provided by the present invention, the second step/the third step includes: and cutting one end of the first disassembly part/the second disassembly part, which is deviated from the third disassembly part, and cutting one end of the first disassembly part/the second disassembly part, which faces the third disassembly part.
Preferably, the method for removing and replacing a Y-shaped downcomer of a blast furnace, provided by the invention, the connecting the first hoisting device with the first detaching part/the second detaching part includes: the first hoisting equipment comprises at least two hauling ropes, and the two hauling ropes are respectively connected with two ends of the first disassembling part/the second disassembling part;
the second lifting device with the third dismantlement portion is connected and is included: the second hoisting equipment comprises at least two ropes, and the two ropes are respectively connected with the first end and the second end of the third dismounting part;
after the first disassembling part and the second disassembling part are disassembled, the first hoisting equipment is connected with the third end of the third disassembling part.
Preferably, the method for removing and replacing a Y-shaped downcomer of a blast furnace provided by the present invention, wherein installing the new Y-shaped downcomer comprises: connecting the first hoisting equipment with the new Y-shaped downcomer, hoisting the new Y-shaped downcomer to an installation position, connecting the second hoisting equipment with the new Y-shaped downcomer, and matching the first hoisting equipment with the second hoisting equipment to adjust the angle of the new Y-shaped downcomer; welding the first port to which the new Y-shaped downcomer has been butted; welding the second port to which the new Y-shaped downcomer has been butted; welding the third port to which the new Y-shaped downcomer has been butted.
In conclusion, the beneficial technical effects of the invention are as follows: the method for dismounting and replacing the Y-shaped downcomer of the blast furnace comprises the Y-shaped downcomer, first hoisting equipment and second hoisting equipment; the first hoisting machine and the second hoisting machine are both used for hoisting the Y-shaped descending pipe; the Y-shaped downcomer comprises a first dismounting part, a second dismounting part and a third dismounting part, the first dismounting part and the second dismounting part are oppositely arranged, and one end of the first dismounting part and one end of the second dismounting part are respectively connected with the third dismounting part; the dismounting and replacing process comprises the following steps: the first hoisting equipment and the second hoisting equipment are both connected with a Y-shaped downcomer, the first dismounting part is dismounted, the second dismounting part is dismounted, the third dismounting part is dismounted, and a new Y-shaped downcomer is mounted; therefore, the Y-shaped downcomer is dismantled in sections, so that internal refractory materials are prevented from being chiseled, the working efficiency is improved, and the hoisting difficulty is reduced and adjusted; meanwhile, the first hoisting equipment and the second hoisting equipment are adopted for simultaneous hoisting, so that the stability of the Y-shaped downcomer in the dismantling process is improved; and the integral installation process of the Y-shaped descending pipe is adopted, so that the air butt welding times are reduced, and the safety risk is reduced.
Drawings
FIG. 1 is a flow chart of a method for removing and replacing a Y-shaped downcomer of a blast furnace according to the present invention.
Fig. 2 is a schematic structural view of the Y-type descent and gravity dust collector provided by the present invention.
Fig. 3 is a first structural schematic diagram of the Y-shaped downcomer provided by the present invention.
Fig. 4 is a schematic structural diagram of a Y-shaped downcomer provided by the present invention.
In the figure, 1, Y-shaped downcomer; 10. a first detachable part; 20. a second detachable part; 30. a third detachable part; 40. a first port; 50. a second port; 60. a third port; 2. a gravity dust collector; 3. a blast furnace.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
The blast furnace downcomer is the main part of a blast furnace ironmaking crude gas system, and is 1000m3The following blast furnace downcomer is generally a Y-type downcomer 1, and an internal refractory is added inside the Y-type downcomer 1. The Y-shaped descending pipe 1 is connected with the blast furnace 3 at the forked end, the Y-shaped descending pipe 1 is connected with the gravity dust collector 2 at the end deviating from the blast furnace 3, and the gravity dust collector 2 is used for carrying out dust removal and purification on crude gas generated in the iron making process of the blast furnace 3.
Referring to fig. 2 to 4, the method for removing and replacing a Y-shaped downcomer of a blast furnace disclosed by the invention comprises a Y-shaped downcomer 1, a first hoisting device and a second hoisting device; the Y-shaped downcomer 1 includes a first detachable portion 10, a second detachable portion 20 and a third detachable portion 30, the first detachable portion 10 and the second detachable portion 20 are disposed opposite to each other, and one end of the first detachable portion 10 and one end of the second detachable portion 20 are respectively connected to the third detachable portion 30.
Specifically, the end of the first detaching part 10 and/or the end of the second detaching part 20 departing from the third detaching part 30 are connected with the blast furnace 3, the end of the third detaching part 30 departing from the first detaching part 10 is connected with the gravity dust collector 2, and the side of the Y-shaped downcomer 1 departing from the ground is provided with a step, so that the constructor can walk conveniently by arranging the step. The Y-shaped downcomer 1 is provided with a ventilation hole, so that the gas in the Y-shaped downcomer 1 can be conveniently ventilated.
The first hoisting device and the second hoisting device are both connected with the Y-shaped descending pipe 1, and the first hoisting machine and the second hoisting machine are both used for hoisting the Y-shaped descending pipe 1.
The first hoisting device and the second hoisting device may be a truck crane, a tower crane, a rubber-tyred crane, or the like, which is not limited in this embodiment.
With continued reference to FIG. 1, this embodiment provides 1000m3The following method for dismantling the Y-shaped downcomer of the blast furnace comprises the following steps:
the method comprises the following steps: the first hoisting equipment and the second hoisting equipment are respectively arranged on two opposite sides of the Y-shaped downcomer 1, the first hoisting equipment is connected with the first dismounting part 10/the second dismounting part 20, and the second hoisting equipment is connected with the third dismounting part 30.
Wherein, first lifting device is connected including with first dismantlement portion 10 second dismantlement portion 20: the first hoisting equipment comprises at least two hauling ropes, and the two hauling ropes are respectively connected with two ends of the first dismounting part 10/the second dismounting part 20; through setting up two haulage ropes and being connected with first dismantlement portion 10 second dismantlement portion 20, avoid first dismantlement portion 10 second dismantlement portion 20 to rock at the in-process of lifting by crane, improved the stability of first dismantlement portion 10 second dismantlement portion 20 at the in-process of lifting by crane.
Taking the orientation shown in fig. 3 as an example, the first end of the third detachable portion 30 is the upper end of the third detachable portion 30, the second end of the third detachable portion 30 is the lower end of the third detachable portion 30, and the third end of the third detachable portion 30 is the left end of the third detachable portion 30. Second lifting device is connected with third dismantlement portion 30, specifically includes: the second lifting device includes two ropes connected to the first and second ends of the third dissembling portion 30, respectively.
Further, the method for removing and replacing the Y-shaped downcomer of the blast furnace provided by the embodiment further comprises: before the first step, arranging a support frame, wherein the support frame is arranged corresponding to the first disassembling part 10, the top end of the support frame is abutted against the first disassembling part 10, and the support frame is used for supporting the first disassembling part 10; through setting up the support frame, avoid first dismantlement portion 10 unstability in the dismantlement process.
Specifically, the top of blast furnace 3 is provided with 3 frames of blast furnace, and the support frame is the triangle-shaped frame, and the support frame is connected with 3 frames of blast furnace, the top and the 10 butt of first dismantlement portion of support frame. Of course, the support frame can also be a rectangular frame. Further, one side of the supporting frame towards the blast furnace 3 is provided with a first working platform, the first working platform is parallel to the horizontal plane, the periphery of the first working platform is provided with guardrails, the first working platform is used for cutting or welding the first disassembling portion 10 by workers, and the safety of the workers is improved by arranging the guardrails.
The support frame and the frame of the blast furnace 3 can be connected by welding, and the support frame and the frame of the blast furnace 3 can also be connected by bolts, which is not limited in this embodiment.
In this embodiment, the method further includes: after the support frame is arranged and before the first step, arranging a support, wherein the support is arranged corresponding to the second disassembling part 20, and the top end of the support abuts against the second disassembling part 20; by providing the bracket, the second detachable portion 20 is prevented from being unstabilized during the detachment process.
The structure of the support frame is substantially the same as that of the support frame, and is not described herein.
The side of the support facing the blast furnace 3 is provided with a second working platform, and the structure of the second working platform is substantially consistent with that of the first working platform, which is not described herein.
The method for removing and replacing the Y-shaped downcomer of the blast furnace provided by the embodiment further comprises the following steps: after the support is arranged and before the first step, a fixing frame is arranged, the fixing frame is arranged corresponding to the third disassembling part 30, and the top end of the fixing frame abuts against the third disassembling part 30; by providing the support frame, the third detachable portion 30 is prevented from being unstable during the detachment process.
The fixing frame may be a rectangular frame, or a triangular frame. In the mounting bracket is rectangular frame's realizable mode, the extending direction of mounting bracket is perpendicular with the horizontal plane, and the one end of mounting bracket is connected with gravity dust collector 2's lateral wall, and the mounting bracket deviates from gravity dust collector 2's one end and the 30 butt of third dismantlement portion, and the mounting bracket is used for providing the holding power for third dismantlement portion 30.
In above-mentioned can realize mode, the mount includes two bracing pieces that set up relatively and is located a plurality of connecting rods between two bracing pieces, and the extending direction and the horizontal plane of bracing piece are perpendicular, and the both ends of connecting rod are connected with the lateral wall of two bracing pieces respectively, and a plurality of connecting rods set up along the extending direction interval of bracing piece. A first inclined rod and a second inclined rod are arranged between two adjacent connecting rods and are arranged in a crossed manner, two ends of the first inclined rod are respectively connected with the outer side walls of the two supporting rods, and two ends of the second supporting rod are respectively connected with the outer side walls of the two supporting rods; through setting up first slope pole and second slope pole, from this, improved the intensity of mount.
At least two inclined supporting rods are arranged on one side, facing the gravity dust collector 2, of the fixing frame, the two inclined supporting rods are respectively arranged on the two supporting rods, the inclined supporting rods are obliquely arranged with the horizontal plane, one ends of the inclined supporting rods are connected with the supporting plate, and the ends, away from the supporting rods, of the inclined supporting rods are connected with the gravity dust collector 2; through setting up the diagonal brace, the intensity of mount has further been improved.
Further, a third working platform is disposed on an outer side wall of an end of the fixing frame facing the third detachable portion 30, and a structure of the third working platform is substantially identical to that of the first working platform, which is not described herein again.
Step two: after the first hoisting device is connected with the first dismounting portion 10, the two ends of the first dismounting portion 10 are respectively cut, and the first dismounting portion 10 is hung to the ground through the first hoisting device. In this embodiment, the method further includes: after the first step, before the second step, the inner refractory material at the cutting position of the first detachable part 10, the cutting position of the second detachable part 20, and the cutting position of the third detachable part 30 is removed; the first detachable part 10, the second detachable part 20 and the third detachable part 30 are cut conveniently by chiseling internal refractory materials at positions to be cut; meanwhile, the construction progress is improved, and the construction time is saved.
Taking the orientation shown in fig. 3 as an example, the cutting positions of the first detachable portion 10 are the left end and the right end of the first detachable portion 10, the cutting positions of the second detachable portion 20 are the left end and the right end of the second detachable portion 20, and the cutting position of the third detachable portion 30 is the left end of the third detachable portion 30, that is, the third end of the third detachable portion 30.
Further, chiseling the internal refractory materials comprises the steps that a first inlet and a second inlet are formed in two ends of the first disassembling portion 10 respectively, a third inlet and a fourth inlet are formed in two ends of the second disassembling portion 20 respectively, a fifth inlet is formed in one end, away from the first disassembling portion 10, of the third disassembling portion 30, and the first inlet, the second inlet, the third inlet, the fourth inlet and the fifth inlet are used for constructors to enter the Y-shaped descending pipe 1 to chiseling the internal refractory materials; thereby improving the convenience of chiseling off the internal resistant material at the cutting position.
Specifically, a first inlet and a second inlet are respectively arranged at the cutting position of the first dismounting portion 10, a third inlet and a fourth inlet are respectively arranged at the cutting position of the second dismounting portion 20, a fifth inlet is arranged on the outer side wall of one end, facing the gravity dust collector 2, of the third dismounting portion 30, namely the fifth inlet is arranged at the cutting position of the third dismounting portion 30, and a worker enters the interior of the Y-shaped downcomer 1 through the first inlet, the second inlet, the third inlet, the fourth inlet and the fifth inlet respectively, so that the interior refractory material of the Y-shaped downcomer 1 can be chiseled conveniently; simultaneously, can a plurality of constructors get into Y type downtake 1 simultaneously by first import, second import and, third import, fourth import and fifth import respectively, chisels simultaneously to the inside resistant material that needs the cutting position, from this, has improved the construction progress, saves the engineering time.
The method for removing and replacing the Y-shaped downcomer of the blast furnace provided by the embodiment further comprises the following steps: after the first step, before the inner refractory is removed, the Y-shaped downcomer 1 is purged; thereby ventilating the inside of the Y-shaped downcomer 1.
Specifically, the Y-shaped downcomer 1 is provided with a ventilation hole, and the Y-shaped downcomer 1 is ventilated by feeding compressed air into the Y-shaped downcomer 1. Step three: the first hoisting equipment is connected with the second dismounting portion 20, two ends of the second dismounting portion 20 are respectively cut, and the second dismounting portion 20 is hung to the ground through the first hoisting equipment.
Specifically, the second step/the third step includes: the end of the first/second disassembly portion 10/20 facing away from the third disassembly portion 30 is cut, and the end of the first/second disassembly portion 10/20 facing the third disassembly portion 30 is cut. One end of the first detaching portion 10, which is away from the third detaching portion 30, is provided with a support frame, and after the cutting is completed, the support frame supports the first detaching portion 10.
Illustratively, the constructor stands at first work platform and cuts the one end that first dismantlement portion 10 deviates from third dismantlement portion 30, and of course, the constructor also can be after the inside resistant material chisel of the one end that first dismantlement portion 10 deviates from third dismantlement portion 30 removes, cuts first dismantlement portion 10 diapire in Y type downtake 1 inside, and then constructor cuts the top of first dismantlement portion 10 on first work platform.
In the above embodiment, the constructor stands on the step to cut the first disassembled part 10 toward one end of the third disassembled part 30.
The cutting manner of the second detachable portion 20 is substantially the same as that of the first detachable portion 10, and is not described herein.
Step four: the first hoisting equipment is connected with one end of the third dismounting part 30, which is far away from the first dismounting part 10, is cut, and the third dismounting part 30 is hoisted to the ground through the second hoisting equipment and the first hoisting equipment.
Wherein, the second lifting device is connected with third dismantlement portion 30 and includes: the second lifting device comprises at least two ropes, which are connected to the first end and the second end of the third detachable portion 30, respectively. After the first and second disassembled parts 10 and 20 are disassembled, the first lifting device is connected with the third end of the third disassembled part 30. Two ropes of the second hoisting equipment and one traction rope of the first hoisting equipment are respectively connected with the third dismounting part 30, so that the third dismounting part 30 is prevented from shaking in the hoisting process, and the stability of the third dismounting part 30 in the hoisting process is improved.
Specifically, the constructor stands on the third work platform and cuts the third dismounting portion 30 towards the one end of gravity dust collector 2, and the first hoisting equipment and the second hoisting equipment cooperate after the cutting is completed to hoist the third dismounting portion 30 to the ground. Therefore, the third dismounting part 30 is prevented from shaking in the air, and the stability of the third dismounting part 30 in the hoisting process is improved.
With continuing reference to fig. 1 to 4, in this embodiment, step five: installing a new Y-downcomer 1 comprises: connecting first hoisting equipment with a new Y-shaped downcomer 1, hoisting the new Y-shaped downcomer 1 to an installation position, connecting second hoisting equipment with the new Y-shaped downcomer 1, and matching the first hoisting equipment with the second hoisting equipment to adjust the angle of the new Y-shaped downcomer 1; the angle of the new Y-shaped descending pipe 1 is adjusted through the matching of the first hoisting equipment and the second hoisting equipment, so that the working efficiency of construction is improved, and the working time is saved.
Specifically, the one end of new Y type is equipped with wire rope, three haulage rope on the first lifting device is connected with the three-terminal of new Y type downtake 1 respectively, from this, the stability of new Y type downtake 1 in the hoist and mount process has been improved, when new Y type downtake 1 hangs to the mounted position, second lifting device is connected with wire rope, through first lifting device and the cooperation of second lifting device, at this moment, support frame and support are placed respectively to the end of splitting of new Y type downtake 1 on, then adjust the one end of new Y type downtake 1 towards gravity dust remover 2.
After the angle is adjusted, welding a first port 40 which is butted with a new Y-shaped downcomer 1; welding the second port 50 to which the new Y-shaped downcomer 1 has been butted; welding the third port 60 to which the new Y-downcomer 1 has been butted.
Specifically, taking the orientation shown in fig. 4 as an example, the first port 40 of the new Y-shaped downcomer 1 is the lower end, the second port 50 of the new Y-shaped downcomer 1 is the left side of the upper portion, the third port 60 of the new Y-shaped downcomer 1 is the right side of the upper portion, the gravity dust collector 2 is provided with an inlet connected with the first port 40 of the new Y-shaped downcomer 1, the inlet is aligned with the first port 40, and then the butt joint is welded; the blast furnace 3 is provided with two interfaces respectively connected with the second port 50 and the third port 60 of the new Y-shaped downcomer 1, the two interfaces are respectively aligned with the second port 50 and the third port 60, then the two interfaces are respectively welded with the two interfaces, and the new Y-shaped downcomer 1 is installed.
The method for dismounting and replacing the Y-shaped downcomer of the blast furnace comprises the Y-shaped downcomer 1, first hoisting equipment and second hoisting equipment; the first hoisting machine and the second hoisting machine are both used for hoisting the Y-shaped downcomer 1; the Y-shaped downcomer 1 comprises a first dismounting part 10, a second dismounting part 20 and a third dismounting part 30, wherein the first dismounting part 10 and the second dismounting part 20 are oppositely arranged, and one end of the first dismounting part 10 and one end of the second dismounting part 20 are respectively connected with the third dismounting part 30; the dismounting and replacing process comprises the following steps: the first hoisting equipment and the second hoisting equipment are both connected with the Y-shaped downcomer 1, the first dismounting part 10 is dismounted, the second dismounting part 20 is dismounted, the third dismounting part 30 is dismounted, and a new Y-shaped downcomer 1 is mounted; therefore, the Y-shaped downcomer 1 is dismantled in sections, so that internal refractory materials are prevented from being chiseled, the working efficiency is improved, and the hoisting difficulty is reduced and adjusted; meanwhile, the first hoisting equipment and the second hoisting equipment are adopted for simultaneous hoisting, so that the stability of the Y-shaped downcomer 1 in the dismantling process is improved; and the integral installation process of the Y-shaped descending pipe 1 is adopted, so that the air butt welding times are reduced, and the safety risk is reduced.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
Finally, it should be noted that: it should be understood that the above examples are only for clearly illustrating the present invention and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications of the invention may be made without departing from the scope of the invention.
Claims (10)
1. A blast furnace Y-shaped downcomer is dismantled and replaced method, characterized by that: the device comprises a Y-shaped descending pipe, a first hoisting device and a second hoisting device;
the first hoisting equipment and the second hoisting equipment are both connected with the Y-shaped descending pipe, and the first hoisting machine and the second hoisting machine are both used for hoisting the Y-shaped descending pipe;
the Y-shaped downcomer comprises a first dismounting part, a second dismounting part and a third dismounting part, the first dismounting part and the second dismounting part are arranged oppositely, and one end of the first dismounting part and one end of the second dismounting part are respectively connected with the third dismounting part;
the dismantling and replacing method comprises the following steps:
the method comprises the following steps: respectively arranging the first hoisting equipment and the second hoisting equipment on two opposite sides of the Y-shaped downcomer, wherein the first hoisting equipment is connected with the first disassembling part/the second disassembling part, and the second hoisting equipment is connected with the third disassembling part;
step two: after the first hoisting equipment is connected with the first dismounting part, cutting two ends of the first dismounting part respectively, and hoisting the first dismounting part to the ground through the first hoisting equipment;
step three: connecting the first hoisting equipment with the second disassembling part, cutting two ends of the second disassembling part respectively, and hoisting the second disassembling part to the ground through the first hoisting equipment;
step four: connecting the first hoisting equipment with one end of the third dismounting part, which is far away from the first dismounting part, cutting one end of the third dismounting part, which is far away from the first dismounting part, and hoisting the third dismounting part to the ground through the second hoisting equipment and the first hoisting equipment;
step five: and installing a new Y-shaped downcomer.
2. The method for removing and replacing the Y-shaped downcomer of a blast furnace as claimed in claim 1, wherein: further comprising:
before the first step, a support frame is arranged, the support frame is arranged corresponding to the first disassembling part, the top end of the support frame abuts against the first disassembling part, and the support frame is used for supporting the first disassembling part.
3. The method for removing and replacing the Y-shaped downcomer of a blast furnace as claimed in claim 2, wherein: further comprising:
after the support frame is arranged and before the first step, a support is arranged, the support and the second disassembling part are correspondingly arranged, and the top end of the support abuts against the second disassembling part.
4. The method for removing and replacing the Y-shaped downcomer of a blast furnace as claimed in claim 3, wherein: further comprising:
after the support is arranged and before the first step, a fixing frame is arranged, the fixing frame and the third disassembling part are correspondingly arranged, and the top end of the fixing frame abuts against the third disassembling part.
5. The method for removing and replacing the Y-shaped downcomer of a blast furnace as claimed in claim 1, wherein: further comprising:
after the first step, before the second step, removing the inner resistant material at the cutting position of the first detaching portion, the cutting position of the second detaching portion, and the cutting position of the third detaching portion.
6. The method for removing and replacing the Y-shaped downcomer of a blast furnace as claimed in claim 5, wherein: the interior resistant material chiseling includes:
the two ends of the first disassembling part are respectively provided with a first inlet and a second inlet, the two ends of the second disassembling part are respectively provided with a third inlet and a fourth inlet, one end of the third disassembling part, which deviates from the first disassembling part, is provided with a fifth inlet, and the first inlet, the second inlet, the third inlet, the fourth inlet and the fifth inlet are all used for constructors to enter the Y-shaped descending pipe to chive out the internal refractory material.
7. The method for removing and replacing the Y-shaped downcomer of a blast furnace as claimed in claim 5, wherein: further comprising:
after the first step, before the inner refractory is chiseled off, the Y-shaped downcomer is purged.
8. The method for removing and replacing the Y-shaped downcomer of a blast furnace as claimed in claim 1, wherein: the second step/the third step comprises: and cutting one end of the first disassembly part/the second disassembly part, which is deviated from the third disassembly part, and cutting one end of the first disassembly part/the second disassembly part, which faces the third disassembly part.
9. The method for removing and replacing the Y-shaped downcomer of a blast furnace as claimed in claim 1, wherein: the first lifting device is connected with the first/second dismounting part and comprises: the first hoisting equipment comprises at least two hauling ropes, and the two hauling ropes are respectively connected with two ends of the first disassembling part/the second disassembling part;
the second lifting device with the third dismantlement portion is connected and is included: the second hoisting equipment comprises at least two ropes, and the two ropes are respectively connected with the first end and the second end of the third dismounting part;
after the first disassembling part and the second disassembling part are disassembled, the first hoisting equipment is connected with the third end of the third disassembling part.
10. The method for removing and replacing the Y-shaped downcomer of a blast furnace as claimed in claim 1, wherein: installing the new Y-drop tube comprises:
connecting the first hoisting equipment with the new Y-shaped downcomer, hoisting the new Y-shaped downcomer to an installation position, connecting the second hoisting equipment with the new Y-shaped downcomer, and matching the first hoisting equipment with the second hoisting equipment to adjust the angle of the new Y-shaped downcomer;
welding the first port to which the new Y-shaped downcomer has been butted; welding the second port to which the new Y-shaped downcomer has been butted; welding the third port to which the new Y-shaped downcomer has been butted.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011356508.7A CN112481437B (en) | 2020-11-27 | 2020-11-27 | Blast furnace Y-shaped downcomer dismounting and replacing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011356508.7A CN112481437B (en) | 2020-11-27 | 2020-11-27 | Blast furnace Y-shaped downcomer dismounting and replacing method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112481437A true CN112481437A (en) | 2021-03-12 |
| CN112481437B CN112481437B (en) | 2022-07-08 |
Family
ID=74936050
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011356508.7A Active CN112481437B (en) | 2020-11-27 | 2020-11-27 | Blast furnace Y-shaped downcomer dismounting and replacing method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112481437B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114480759A (en) * | 2021-12-23 | 2022-05-13 | 中国华冶科工集团有限公司 | Method for dismantling blast furnace downcomer |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1654342A1 (en) * | 1989-06-09 | 1991-06-07 | Череповецкое Су N 1 Треста "Центрдомнаремонт" | Method for replacement of annular air duct for hot blowing of blast furnace |
| CN102851421A (en) * | 2012-04-18 | 2013-01-02 | 天津二十冶建设有限公司 | Method for installing blast furnace single-tube downcomer |
| CN103233087A (en) * | 2013-04-25 | 2013-08-07 | 攀钢集团工程技术有限公司 | Method for lifting downcomer of blast furnace |
| CN104878139A (en) * | 2015-05-28 | 2015-09-02 | 中国十七冶集团有限公司 | One-step integral hoisting method for Y-shaped three-way-type downcomer of blast furnace |
| CN104878146A (en) * | 2015-06-09 | 2015-09-02 | 中国十九冶集团有限公司 | Construction method for replacing ripple compensator on top of gravitational dust collector |
-
2020
- 2020-11-27 CN CN202011356508.7A patent/CN112481437B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1654342A1 (en) * | 1989-06-09 | 1991-06-07 | Череповецкое Су N 1 Треста "Центрдомнаремонт" | Method for replacement of annular air duct for hot blowing of blast furnace |
| CN102851421A (en) * | 2012-04-18 | 2013-01-02 | 天津二十冶建设有限公司 | Method for installing blast furnace single-tube downcomer |
| CN103233087A (en) * | 2013-04-25 | 2013-08-07 | 攀钢集团工程技术有限公司 | Method for lifting downcomer of blast furnace |
| CN104878139A (en) * | 2015-05-28 | 2015-09-02 | 中国十七冶集团有限公司 | One-step integral hoisting method for Y-shaped three-way-type downcomer of blast furnace |
| CN104878146A (en) * | 2015-06-09 | 2015-09-02 | 中国十九冶集团有限公司 | Construction method for replacing ripple compensator on top of gravitational dust collector |
Non-Patent Citations (3)
| Title |
|---|
| 张志勇等: "特大型高炉下降管拆装技术", 《2009全国钢结构学术年会论文集》 * |
| 沈洪斌等: "论高炉下降管吊装双机抬吊重量分配技术", 《安装》 * |
| 赵建辉: "穿裙子法更换下降总管在酒钢2~#高炉大修中的应用", 《甘肃冶金》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114480759A (en) * | 2021-12-23 | 2022-05-13 | 中国华冶科工集团有限公司 | Method for dismantling blast furnace downcomer |
| CN114480759B (en) * | 2021-12-23 | 2023-08-22 | 中国华冶科工集团有限公司 | Method for dismantling down tube of blast furnace |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112481437B (en) | 2022-07-08 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107558723B (en) | Method for manufacturing and installing hanging bracket of hanging basket for inclined roof | |
| CN103470093B (en) | Concrete chimney dismantling method | |
| CN112481437B (en) | Blast furnace Y-shaped downcomer dismounting and replacing method | |
| CN110485752B (en) | High-rise building dismantling method and machine | |
| CN110159057B (en) | Mounting and construction method for smoke pipe of technically improved factory building | |
| CN112031461A (en) | Dismantling and cleaning device of horizontal structure | |
| JP2000145129A (en) | Staging provided with load lifter | |
| JP5356091B2 (en) | Crane girder exchanging method and crane girder exchanging apparatus | |
| CN206814686U (en) | The apparatus and system changed for coke oven stay | |
| CN214942875U (en) | Movable workshop | |
| JP3757509B2 (en) | Construction method of water-containing gas holder | |
| JPH09268778A (en) | Disassembling method of water-contained gas holder and member used for the same method | |
| JP5378043B2 (en) | Steel tower supported chimney dismantling method | |
| CN110724783B (en) | Dismantling and installing method of waste heat boiler in converter environment-friendly reconstruction | |
| CN210561720U (en) | Pier stud maintenance repair operation platform | |
| CN114480759B (en) | Method for dismantling down tube of blast furnace | |
| JP2017128907A (en) | Jig for installation and covering from weather of lining plate and method for installation of lining plate using the jig | |
| CN111379900B (en) | Method for installing indoor horizontal large flue of large sintering plant | |
| CN217871986U (en) | High-rise building demolishs building machine | |
| CN215671491U (en) | Quick detach formula construction protection system | |
| CN220312209U (en) | Frame type high pile construction operation platform | |
| CN218623494U (en) | Structure is demolishd to precast concrete cladding panel | |
| JP3864386B2 (en) | Construction method of the water type gas holder. | |
| CN219569530U (en) | Flue overhauls device | |
| WO2022235024A1 (en) | Wire saw apparatus for excavator |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |