Device for evaporative cooling of fixed flue of converter and replacement method

Abstract

The invention discloses a converter evaporation cooling fixed flue device and a replacing method, and relates to the technical field of converter steelmaking equipment overhaul in the metallurgical industry, the converter evaporation cooling fixed flue device comprises a fixed flue, a tail flue, a fixed hoisting tool and a movable hoisting device, the fixed flue comprises a first lower-section flue, a first middle-section flue, a first upper-section flue and a first connecting pipe; the fixed hoisting tool is used for hoisting the first lower-section flue, the first middle-section flue, the first upper-section flue and the first connecting pipe to designed positions; the movable hoisting device is used for hoisting the second lower-section flue, the second middle-section flue, the second upper-section flue and the second connecting pipe to designed positions, the structure is simple, and the replacement safety of the evaporative cooling flue is effectively improved.

Description

Technical Field

[0001] The invention relates to the technical field of overhaul of converter steelmaking equipment in the metallurgical industry, and in particular to a device for a fixed flue of a converter vaporization cooling and a replacement method. Background Art

[0002] At present, the converter vaporization cooling flue is an important equipment in the converter steelmaking process. It is a necessary equipment for absorbing the heat and dust generated during the converter smelting process. It is the flue of the waste heat boiler and dust removal system of the converter negative energy steelmaking. The working environment is harsh and it is subjected to high temperature changes of alternating hot and cold. Due to the harsh operating conditions, the vaporization cooling flue leaks at the end of its life, posing a major hidden danger to the safe production of the converter and seriously threatening the safety of personnel and property.

[0003] When the life of the vaporization cooling flue expires, it needs to be replaced. However, the converter vaporization cooling flue is compact in structure and has very limited space, so it is very difficult to replace the fixed flue. Moreover, the implementation process mostly involves large-scale lifting and even dangerous operations. The implementation process is highly dangerous and can easily cause casualties or major economic losses. Summary of the invention

[0004] The purpose of the present invention is to provide a device and a replacement method for a fixed flue of a converter vaporization cooling to solve the problems existing in the above-mentioned prior art. The device has a simple structure and can effectively improve the safety of replacing the vaporization cooling flue.

[0005] To achieve the above object, the present invention provides the following solutions:

[0006] The present invention provides a device for fixing a converter gasification cooling flue, comprising: a fixed flue, a tail flue, a fixed hoisting tool and a movable hoisting device, wherein the fixed flue comprises a first lower flue, a first middle flue, a first upper flue and a first connecting pipe, wherein the first lower flue is connected to the movable flue through a flange, the first lower flue is used for welding and fixing with the first middle flue, the first middle flue is sleeved and fixed to the bottom of the first connecting pipe, and the first upper flue is sleeved and fixed to the top of the first connecting pipe; the tail flue comprises a second lower flue, a second middle flue, a second upper flue and a second connecting pipe, wherein the first lower flue is connected to the movable flue through a flange, the first lower flue is used for welding and fixing with the first middle flue, the first middle flue is sleeved and fixed to the bottom of the first connecting pipe, and the first upper flue is sleeved and fixed to the top of the first connecting pipe; the tail flue comprises a second lower flue, a second middle flue, a second upper flue and a second connecting pipe, and the first The second lower flue section is used to be welded and fixed to the second middle flue section, the second middle flue section is fixed to the bottom of the second pipe, the second upper flue section is fixed to the top of the second pipe, and the top of the second upper flue is used to be fixed to the first upper flue through a flange; the fixed lifting tool is arranged on the high span of the converter, and the fixed lifting tool is used to lift the first lower flue section, the first middle flue section, the first upper flue section and the first pipe to the designed position; the movable lifting device is used to lift the second lower flue section, the second middle flue section, the second upper flue section and the second pipe to the designed position.

[0007] Preferably, the fixed lifting tool includes a charging straddle crane and an oxygen lance straddle crane.

[0008] Preferably, it further comprises a plurality of platforms, and a hand hoist or an electric hoist is arranged below the platforms.

[0009] Preferably, the movable lifting device is a hydraulic truck crane that spans the ground for steel production.

[0010] The present invention also provides a method for replacing the device for fixed flue of converter vaporization cooling using the above-mentioned device, comprising the following steps:

[0011] Use fixed lifting tools to transport the first upper flue to the designed position of the first upper flue and temporarily fix it;

[0012] Similarly, the first middle section of the flue is transported to the designed position using fixed lifting tools and temporarily fixed;

[0013] Similarly, the first lower flue is transported to the designed position using fixed lifting tools and temporarily fixed;

[0014] Move the mobile flue back to its original position and adjust it to the designed elevation. Use the lower flange to align, align, and temporarily fix the first lower flue with the mobile flue.

[0015] Use the lower opening of the first middle section flue to align with the first lower section flue and then weld the first middle section flue and the first lower section flue;

[0016] Adjust the first upper flue to the designed elevation and align it, weld and fix the first connecting pipe between the first upper flue and the first middle flue;

[0017] Use the movable lifting device to lift the second upper flue to the designed elevation and align and fix it to the first upper flue of the main flue through the flange;

[0018] Similarly, the second middle section of the flue is hoisted to the designed elevation using a movable hoisting device and temporarily fixed;

[0019] Similarly, the second lower section of the flue is hoisted to the designed elevation using a movable hoisting device and temporarily fixed;

[0020] Align the lower end of the second middle section of the flue with the third section of the flue and align and weld them;

[0021] Weld and fix the second connecting pipe between the second middle flue and the second upper flue.

[0022] Compared with the prior art, the present invention has achieved the following technical effects:

[0023] The present invention provides a device and a replacement method for a fixed flue for vaporization cooling of a converter. The flue can be installed in place by manufacturing the fixed flue and the tail flue in sections, reducing the weight and the overall dimensions of each piece, and adopting a recommended hoisting method with a higher safety factor, thereby reducing the risk factor in the construction process and shortening the construction period. In addition, a first connecting pipe and a second connecting pipe are provided to adjust the error between the flues after installation and alignment. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0025] Figure 1 A schematic diagram of the structure of the device for fixed flue of converter vaporization cooling provided by the present invention;

[0026] Figure 2 A schematic diagram of the structure of a fixed flue in the device for fixed flue for converter vaporization cooling provided by the present invention;

[0027] Figure 3 A schematic diagram of the structure of the tail flue in the device for fixed flue for converter vaporization cooling provided by the present invention;

[0028] In the figure: 1. Charging span crane; 2. Oxygen lance span crane; 3. Main flue; 4. Mobile flue; 5. Tail flue; 6. Hand chain hoist or electric hoist; 7. Hydraulic truck crane; 8. First upper section flue; 9. First middle section flue; 10. First lower section flue; 11. Second upper section flue; 12. Second middle section flue; 13. Second lower section flue. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] The purpose of the present invention is to provide a device and a replacement method for a fixed flue of a converter vaporization cooling to solve the problems existing in the above-mentioned prior art. The device has a simple structure and can effectively improve the safety of replacing the vaporization cooling flue.

[0031] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0032] Embodiment 1

[0033] This embodiment provides a device for fixing a converter flue gasification cooling, such as Figures 1 to 3 As shown, it includes: a fixed flue, a tail flue, a fixed lifting tool and a movable lifting device, the fixed flue includes a first lower flue, a first middle flue, a first upper flue and a first connecting pipe, the first lower flue is connected to the mobile flue through a flange, the first lower flue is used to be welded and fixed to the first middle flue, the first middle flue is sleeved and fixed to the bottom of the first connecting pipe, and the first upper flue is sleeved and fixed to the top of the first connecting pipe; the tail flue includes a second lower flue, a second middle flue, a second upper flue and a second connecting pipe, the second lower flue is used to be welded and fixed to the first middle flue, The second middle section flue is welded and fixed, the second middle section flue is sleeved and fixed on the bottom of the second pipe, the second upper section flue is sleeved and fixed on the top of the second pipe, and the top of the second upper section flue is used to be fixed to the first upper section flue through a flange; the fixed lifting tool is arranged on the high span of the converter, and the fixed lifting tool is used to lift the first lower section flue, the first middle section flue, the first upper section flue and the first pipe to the designed position; the movable lifting device is used to lift the second lower section flue, the second middle section flue, the second upper section flue and the second pipe to the designed position.

[0034] In a preferred solution of this embodiment, the fixed lifting tool includes a charging straddle crane and an oxygen lance straddle crane, which have a simple structure and a high safety factor.

[0035] In a preferred solution of this embodiment, the device for fixing the converter gasification cooling flue further includes a plurality of platforms, and a hand hoist or an electric hoist is provided below the platforms.

[0036] In a preferred solution of this embodiment, the movable lifting device is a hydraulic truck crane for steel-outleting across the ground, which has a simple structure and a high safety factor.

[0037] In a preferred solution of this embodiment, the length of the first connecting pipe and the second connecting pipe is 800-1000 mm (the specific size is reserved according to actual needs), which is used to adjust the error between the flues after installation and alignment.

[0038] Embodiment 2

[0039] This embodiment also provides a method for replacing the device for fixed flue of converter vaporization cooling using the above-mentioned device, comprising the following steps:

[0040] Figure 2When manufacturing the main flue 3, it is divided into three sections according to the external dimensions of the drawing, namely the first upper flue 8, the first middle flue 9, and the first lower flue 10. The first connecting pipe is used between the first upper flue 8 and the first middle flue 9 for installation, alignment and fixation, and the first middle flue 9 and the first lower flue 10 are fixed by direct interface welding. Specific installation method:

[0041] The first upper flue 8 is hoisted to the oxygen lance span by the charging span crane 1, and is hoisted to a certain height by the oxygen lance span crane 2, and then the hand chain hoist provided under the platform is used to "relay" and hoist it to the position of the first upper flue 8 for temporary fixation;

[0042] Similarly, the first middle section flue 9 is transported to the designed position by using the charging span crane 1, the oxygen lance span crane 2 and the hand chain hoist provided under the platform, and temporarily fixed;

[0043] Similarly, the first lower flue 10 is transported to the designed position by using the charging crane 1, the oxygen lance crane 2 and the hand chain hoist provided under the platform, and temporarily fixed;

[0044] Move the mobile flue 4 back to its original position and adjust it to the relevant elevation, align, align and temporarily fix the first lower flue 10 with the mobile flue 4 using the lower flange;

[0045] Align the lower end of the first middle flue 9 tube bundle with the first lower flue 10 tube bundle and weld each tube bundle interface;

[0046] The first upper flue 8 is adjusted to the set elevation and aligned, and the flat steel between the first connecting pipe and the pipe bundle between the first upper flue 8 and the first middle flue 9 is welded and fixed.

[0047] Figure 3 When manufacturing the tail flue 5, it is divided into three sections according to the external dimensions of the drawing, namely the second upper flue 11, the second middle flue 12, and the second lower flue 13. The second connecting pipe is used between the second upper flue 11 and the second middle flue 12 for installation, alignment and fixation, and the second middle flue 12 and the second lower flue 13 are fixed by direct interface welding. Specific installation method:

[0048] The second upper flue 11 is hoisted and transported to the platform by the hydraulic truck crane 7 for steel-outlet crossing the ground, and then the electric hoist 6 provided under the platform is used to "relay" and transport it to the design elevation of the second upper flue 11 and align and fix it by the flange of the first upper flue 8 of the main flue;

[0049] Similarly, the second lower flue 13 is transported to the designed position by using the hydraulic truck crane 7 across the ground and the electric hoist 6 arranged under the platform, and temporarily fixed;

[0050] Similarly, the second middle section flue 12 is transported to the expected position by using the hydraulic truck crane 7 across the ground and the electric hoist 6 arranged under the platform, and temporarily fixed;

[0051] Use the lower end of the second middle section flue 12 tube bundle to align and align with the second lower section flue 13 tube bundle, and weld each tube bundle interface;

[0052] The second connecting pipe and the flat steel between the pipe bundles between the second upper flue 11 and the second middle flue 12 are welded and fixed.

[0053] The present invention uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only used to help understand the method and core ideas of the present invention. At the same time, for those skilled in the art, according to the ideas of the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A device for fixed flue of converter vaporization cooling, characterized in that: include: A fixed flue, the fixed flue comprising a first lower flue, a first middle flue, a first upper flue and a first connecting pipe, the first lower flue being connected to the mobile flue via a flange, the first lower flue being fixed to the first middle flue by welding, the first middle flue being fixed to the bottom of the first connecting pipe, and the first upper flue being fixed to the top of the first connecting pipe; A tail flue, the tail flue comprising a second lower flue, a second middle flue, a second upper flue and a second pipe, the second lower flue being fixed by welding to the second middle flue, the second middle flue being fixed to the bottom of the second pipe, the second upper flue being fixed to the top of the second pipe, the top of the second upper flue being fixed to the first upper flue through a flange; A fixed hoisting tool, which is arranged on the high span of the converter and is used to hoist the first lower flue, the first middle flue, the first upper flue and the first connecting pipe to a designed position; and A movable lifting device is used to lift the second lower flue, the second middle flue, the second upper flue and the second connecting pipe to a designed position.

2. The device for fixed flue of converter vaporization cooling according to claim 1, characterized in that: The fixed lifting tools include a charging straddle crane and an oxygen lance straddle crane.

3. The device for fixed flue of converter vaporization cooling according to claim 2, characterized in that: It also includes a plurality of platforms, under which a hand chain hoist or an electric hoist is arranged.

4. The device for fixed flue of converter vaporization cooling according to claim 3 is characterized in that: The movable lifting device is a hydraulic truck crane that spans the ground for steel production.

5. A method for replacing the device for fixed flue of converter vaporization cooling using the device of claims 1 to 4, characterized in that: The following steps are involved: Use fixed lifting tools to transport the first upper flue to the designed position of the first upper flue and temporarily fix it; Similarly, the first middle section of the flue is transported to the designed position using fixed lifting tools and temporarily fixed; Similarly, the first lower flue is transported to the designed position using fixed lifting tools and temporarily fixed; Move the mobile flue back to its original position and adjust it to the designed elevation. Use the lower flange to align, align, and temporarily fix the first lower flue with the mobile flue. Use the lower opening of the first middle section flue to align with the first lower section flue and then weld the first middle section flue and the first lower section flue; Adjust the first upper flue to the designed elevation and align it, weld and fix the first connecting pipe between the first upper flue and the first middle flue; Use the movable lifting device to lift the second upper flue to the designed elevation and align and fix it to the first upper flue of the main flue through the flange; Similarly, the second middle section of the flue is hoisted to the designed elevation using a movable hoisting device and temporarily fixed; Similarly, the second lower section of the flue is hoisted to the designed elevation using a movable hoisting device and temporarily fixed; Align the lower end of the second middle section of the flue with the third section of the flue and align and weld them; Weld and fix the second connecting pipe between the second middle flue and the second upper flue.

Images