Dismounting method for discharge pipeline of granulation tower system

Abstract

The invention discloses a dismounting method of a discharge pipeline of a granulation tower system, which comprises the following steps: taking an elbow section downwards from the top of the discharge pipeline, winding and fixing the elbow section by adopting a hoisting rope, forming a first operation manhole, performing annular cutting in the elbow section, taking a first straight pipe section after the elbow section is hoisted away, and taking a second straight pipe section after the first straight pipe section is hoisted away; a plurality of operation holes are formed in the straight pipe section through a first operation manhole, annular cutting is conducted in the first straight pipe section through a second operation manhole below the first straight pipe section, the first straight pipe section is lifted away, then a second straight pipe section is taken down from the position of the first straight pipe section, and the second straight pipe section is taken down from the position of the second straight pipe section. And the second straight pipe section is dismantled by repeating the hoisting method of the first straight pipe section until dismantling of the discharge pipeline is completed, through the dismantling method, the hoisting requirement of hoisting equipment is lowered, arrangement of the hoisting equipment can be flexibly carried out, dismantling is carried out on the discharge pipeline section by section, the operation reliability is kept, and meanwhile the construction efficiency is improved. And the dismounting and lifting risk caused by original damage of the pipe section is reduced, the operation stability is kept, and the dismounting efficiency is improved.

Description

Technical Field

[0001] The present application relates to the technical field of blast furnace system dismantling and repairing, and in particular to a method for dismantling a discharge pipeline of a granulating tower system. Background Art

[0002] The information provided in this section is for the purpose of generally presenting the background of the present disclosure. To the extent described in this section, the work of the presently named inventors and aspects of the description that may not constitute prior art at the time of filing are neither explicitly nor implicitly admitted to be prior art to the present disclosure.

[0003] At present, when the granulation tower steel chimney in the blast furnace slag treatment system is replacing the fiberglass pipe and dismantling the original pipe, the pipe base material is steel. Due to long-term use, the exhaust pipe is severely corroded, the gaps at the joints are gradually enlarged, and water vapor leaks from the welding points and the main body, resulting in loss of function and safety hazards.

[0004] The exhaust pipe demolition mainly involves the demolition of the straight section of the blast furnace granulating tower chimney, and the inclined section is retained as a support. The difficulty of the project lies in: the construction area belongs to the blast furnace top operation area, the construction hoisting height is extremely high, and there is a risk of gas leakage when carrying out hoisting operations in the area. In particular, the blast furnace structure is severely corroded, resulting in poor structural strength, especially ultra-high and long-distance hoisting, which increases the difficulty or safety risk of hoisting operations. Under abnormal production conditions, construction must be stopped to make way for the slag pit and production. Summary of the invention

[0005] In view of the defects existing in the prior art, the present application provides a method for dismantling the discharge pipe of a granulation tower system to solve the problem in the prior art that the discharge pipe is difficult to dismantle and affects production operations.

[0006] The above-mentioned purpose of the present application is mainly achieved through the following technical solutions:

[0007] A method for dismantling a discharge pipe of a granulation tower system, the method comprising:

[0008] Take the elbow section downward from the top of the discharge pipe, use a lifting rope to wind and fix the elbow section, and open a first working manhole in the lower area of ​​the elbow section, perform circular cutting in the elbow section through the working manhole, and lift the elbow section away by lifting equipment;

[0009] Take a first straight pipe section below the elbow section, open multiple working holes on the straight pipe section through the first working manhole, fix it to the multiple working holes through the lifting rope, open a second working manhole in the lower area of ​​the first straight pipe section, perform annular cutting in the first straight pipe section through the second working manhole, and lift it away from the first straight pipe section through the lifting equipment;

[0010] Take the second straight pipe section at the position of the first straight pipe section, and repeat the lifting method of the first straight pipe section to dismantle the second straight pipe section until the dismantling of the discharge pipe is completed.

[0011] In an optional embodiment, during the lifting operation of each straight pipe section, a plurality of working platforms are set up in the working hole on the straight pipe section, and workers move to the working platforms to perform cutting or fixing operations of the lifting ropes.

[0012] In an optional embodiment, when the working holes are opened, a plurality of the working holes are symmetrically arranged on the discharge pipe, so that the working platform is disposed between the symmetrical working holes.

[0013] In an optional embodiment, when setting up the working platform, a supporting tube is passed through the two working holes, and a working board is laid on the supporting tube to form the working platform.

[0014] In an optional embodiment, the working platform is fixed in the discharge pipe by spot welding.

[0015] In an optional embodiment, before performing annular cutting on the elbow section and the straight pipe section, confirm that the weight of the elbow section and the straight pipe section is within the lifting range of the lifting equipment, and select the length of the elbow section and the straight pipe section on the premise that the weight of the elbow section and the straight pipe section is within the lifting range of the lifting equipment.

[0016] In an optional embodiment, before dismantling the discharge pipe, a baffle is arranged at the outlet of the discharge pipe of the granulation tower to isolate the discharge at the outlet of the discharge pipe.

[0017] In an optional embodiment, before the annular cutting operation is performed, the discharge pipe is checked and the annular cutting is made to avoid damaged parts.

[0018] In an optional embodiment, when the working hole is opened, the discharge pipe is checked and the working hole is made to avoid a damaged part.

[0019] In an optional embodiment, when the lifting equipment lifts off the elbow section and the straight pipe section, after the elbow section or the straight pipe section is lifted away by a distance of 100 to 200 mm, the elbow section or the straight pipe section is kept suspended until the lifting is completed after observation and confirmation by the operating personnel.

[0020] Compared with the prior art, the advantages of this application are:

[0021] The dismantling method of the present application is to first take the elbow section downward from the top of the discharge pipe, use a lifting rope to wind and fix the elbow section, and open a first working manhole in the lower area of ​​the elbow section, and use the working manhole to perform circular cutting in the elbow section, and lift the elbow section away by a lifting device, and then take the first straight pipe section under the position of the elbow section, and open a plurality of working holes on the straight pipe section by the first working manhole, and fix the plurality of working holes by the lifting rope, and open a second working manhole in the lower area of ​​the first straight pipe section, and use the second working manhole to perform cutting in the first straight pipe section. Perform circular cutting, lift the first straight pipe section by lifting equipment, then take the second straight pipe section at the position of the first straight pipe section, and repeat the lifting method of the first straight pipe section to remove the second straight pipe section until the removal of the discharge pipe is completed. Through this removal method, the lifting requirements of the lifting equipment are reduced, the lifting equipment can be arranged flexibly, the impact on the original production operation is reduced, and the discharge pipe is dismantled section by section. While maintaining the reliability of the operation, it also reduces the risk of removal and lifting caused by the original damage of the pipe section, further maintaining the stability of the operation and improving the efficiency of the dismantling operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0023] Figure 1 A schematic diagram of a dismantling method according to an embodiment of the present application;

[0024] Figure 2 A partial schematic diagram of an elbow section provided in an embodiment of the present application;

[0025] In the figure: 101, elbow section; 102, straight pipe section; 103, first working manhole; 104, second working manhole; 105, working hole. DETAILED DESCRIPTION

[0026] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments. It should be noted that the description of these embodiments is used to help understand the present invention, but does not constitute a limitation of the present invention. The specific structures and functional details disclosed herein are only used to describe the exemplary embodiments of the present invention. However, the present invention can be embodied in many alternative forms, and it should not be understood that the present invention is limited to the embodiments set forth herein.

[0027] like Figure 1 As shown, Figure 1A schematic diagram of a dismantling method provided in an embodiment of the present application, a method for dismantling a discharge pipe of a granulating tower system, the dismantling method comprising:

[0028] like Figure 1 , Figure 2 As shown, Figure 2 A partial schematic diagram of the elbow section 101 provided in an embodiment of the present application;

[0029] Take the elbow section 101 downward from the top of the discharge pipe, use a lifting rope to fix the elbow section 101, and open a first working manhole 103 in the lower area of ​​the elbow section 101. The working manhole performs circular cutting in the elbow section 101, and the elbow section 101 is lifted away by lifting equipment.

[0030] Limited by the operation area and on-site environment of the demolition operation, according to the layout position and hoisting specifications of the lifting equipment, a certain distance downward from the top of the discharge pipe is used as the elbow section 101, and the elbow section 101 is first demolished to facilitate the stable lifting of the elbow section 101 and the stable control of the subsequent straight pipe section 102.

[0031] A first straight pipe section 102 is taken below the elbow section 101, and a plurality of working holes 105 are opened on the straight pipe section 102 by the first working manhole 103, which is fixed to the plurality of working holes 105 by a lifting rope, and a second working manhole 104 is opened in the lower area of ​​the first straight pipe section 102, and an annular cutting is performed in the first straight pipe section 102 by the second working manhole 104, and the straight pipe section 102 is lifted away from the first straight pipe section 102 by a lifting device.

[0032] Correspondingly, after the elbow section 101, according to the layout position and lifting specifications of the lifting equipment, the elbow section 101 of the discharge pipe is continued downward for a certain distance to form a straight pipe section 102, and the straight pipe section 102 is dismantled to facilitate the stable lifting of the straight pipe section 102.

[0033] A second straight pipe section 102 is taken at the position of the first straight pipe section 102, and the lifting and removing method of the first straight pipe section 102 is repeated to remove the second straight pipe section 102 until the removal of the discharge pipe is completed.

[0034] In an optional embodiment, the working principle of the demolition method in the present application is: first, take the elbow section 101 downward from the top of the discharge pipe, use a lifting rope to fix the elbow section 101, and open a first working manhole 103 in the lower area of ​​the elbow section 101, and use the working manhole to perform an annular cutting in the elbow section 101, and lift the elbow section 101 away by a lifting device, and then take the first straight pipe section 102 at the position of the elbow section 101, and open a plurality of working holes 105 on the straight pipe section 102 by the first working manhole 103, and fix the plurality of working holes 105 by a lifting rope, and open a second working manhole 104 in the lower area of ​​the first straight pipe section 102, and use the working manhole 103 to remove the first straight pipe section 102. The second working manhole 104 performs an annular cutting in the first straight pipe section 102, and the first straight pipe section 102 is lifted off by lifting equipment, and then the second straight pipe section 102 is taken at the position of the first straight pipe section 102, and the lifting method of the first straight pipe section 102 is repeated to dismantle the second straight pipe section 102 until the dismantling of the discharge pipe is completed. Through this dismantling method, the hoisting requirements of the hoisting equipment are reduced, the arrangement of the hoisting equipment can be flexibly carried out, and the impact on the original production operation is reduced. Moreover, the dismantling is carried out section by section on the discharge pipe, which maintains the reliability of the operation while reducing the risk of dismantling and lifting caused by the original damage of the pipe section, further maintaining the stability of the operation and improving the efficiency of the dismantling operation.

[0035] In an optional embodiment, when each straight pipe section 102 is lifted off, a plurality of working platforms are set up in the working hole 105 on the straight pipe section 102, and workers move to the working platforms to perform cutting or fixing operations of lifting ropes. On the one hand, the working platforms improve the operating reliability of workers, and workers can move to different positions through the working platforms to perform corresponding operations, which is more applicable to pipelines of different specifications.

[0036] In an optional embodiment, when the working holes 105 are opened, a plurality of the working holes 105 are symmetrically arranged on the discharge pipe, so that the working platform is disposed between the symmetrical working holes 105 .

[0037] The multiple working holes 105 are spaced apart and evenly arranged, which can maintain a more stable transportation effect and improve the reliability of the operation when lifting. Moreover, the working platform can be set up through the multiple working holes 105 to maintain the stability and convenience of the working platform setting up and improve the working efficiency.

[0038] In an optional embodiment, when setting up the working platform, a supporting pipe is passed through the two working holes 105, and a working board is laid on the supporting pipe to form the working platform.

[0039] In an optional embodiment, the working platform is fixed in the discharge pipe by spot welding, which not only maintains a certain stability of the working platform but also facilitates the rapid separation operation after the pipeline is transported.

[0040] In an optional embodiment, before the annular cutting of the elbow section 101 and the straight pipe section 102, it is confirmed that the weight of the elbow section 101 and the straight pipe section 102 is within the lifting range of the lifting equipment, and the length of the elbow section 101 and the straight pipe section 102 is selected on the premise that the weight of the elbow section 101 and the straight pipe section 102 is within the lifting range of the lifting equipment.

[0041] In an optional embodiment, before dismantling the discharge pipe, a baffle is arranged at the outlet of the vent pipe of the granulation tower to isolate the emissions at the outlet of the vent pipe, and to isolate the workers and the working area to a certain extent, so as to prevent the high-temperature emissions at the outlet of the vent pipe from affecting the work and endangering the personal safety of the workers.

[0042] In an optional embodiment, before performing the circular cutting operation, the discharge pipe is checked, and the circular cutting is avoided from the damaged part to avoid operations at the damaged part to avoid affecting the stability of subsequent lifting. It should be noted that if there is a severely corroded area on the discharge pipe, the discharge pipe needs to be reinforced before lifting to ensure safety.

[0043] In an optional embodiment, when opening the working hole 105, the discharge pipe is checked and the working hole 105 is moved away from damaged parts to avoid working at the damaged parts and affecting the stability of subsequent lifting.

[0044] In an optional embodiment, when the lifting equipment lifts off the elbow section 101 and the straight pipe section 102, after the elbow section 101 or the straight pipe section 102 is lifted off a distance of 100 to 200 mm, the elbow section 101 or the straight pipe section 102 is kept suspended until the lifting is completed after observation and confirmation by an operator, and before the lifting is completely completed, the stability is confirmed again by hovering.

[0045] It should be noted that when the elbow section 101 and the straight pipe section 102 are dismantled and put on the ground, sleepers are set in the working area, and the sleepers are pre-arranged as supporting slopes so that the elbow section 101 and the straight pipe section 102 can be separated from the lifting equipment after being tilted and put on the ground, thereby improving working efficiency.

[0046] It should be understood that the terms first, second, etc. are only used to distinguish descriptions and should not be understood as indicating or suggesting relative importance. Although the terms first, second, etc. may be used herein to describe various units, these units should not be limited by these terms. These terms are only used to distinguish one unit from another unit. For example, the first unit may be referred to as the second unit, and similarly, the second unit may be referred to as the first unit without departing from the scope of the exemplary embodiments of the present invention.

[0047] It should be understood that the term "and / or" in this article is merely a description of the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can represent three situations: A exists alone, B exists alone, and A and B exist at the same time. The term " / and" in this article describes another relationship between associated objects, indicating that two relationships may exist. For example, A / and B can represent two situations: A exists alone, and A and B exist alone. In addition, the character " / " in this article generally indicates that the previous and next associated objects are in an "or" relationship.

[0048] It should be understood that in the description of the present invention, the terms "upper", "vertical", "inside", "outside" and the like indicate orientations or positional relationships that are customarily placed when the disclosed product is used, or are orientations or positional relationships that are customarily understood by those skilled in the art. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0049] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "setting", "installation" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be a communication between the two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0050] The terms used herein are only used to describe specific embodiments and are not intended to limit the exemplary embodiments of the present invention. As used herein, the singular forms "a", "an", and "the" are intended to include the plural forms unless the context clearly indicates the opposite meaning. It should also be understood that the terms "include", "comprising", "including", and / or "comprising" when used herein specify the existence of the claimed features, integers, steps, operations, units, and / or components, and do not exclude the existence or increase of one or more other features, quantities, steps, operations, units, components, and / or their combinations.

[0051] Specific details are provided in the following description to facilitate a complete understanding of the exemplary embodiments. However, it should be understood by those of ordinary skill in the art that the exemplary embodiments may be implemented without these specific details. In other embodiments, well-known processes, structures, and techniques may not be shown in unnecessary detail to avoid making the exemplary embodiments unclear.

[0052] The above is only a specific implementation of the present application, so that those skilled in the art can understand or implement the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest range consistent with the principles and novel features applied for herein.

[0053] It should be noted that the information disclosed in the above background technology section is only used to enhance the understanding of the background of the present disclosure, and therefore may include information that does not constitute the prior art known to ordinary technicians in the field.

Claims

1. A method for dismantling the discharge pipe of a granulation tower system, It is characterized in that The removal method comprises: Take the elbow section downward from the top of the discharge pipe, use a lifting rope to wind and fix the elbow section, and open a first working manhole in the lower area of ​​the elbow section, perform circular cutting in the elbow section through the working manhole, and lift the elbow section away by lifting equipment; Take a first straight pipe section below the elbow section, open multiple working holes on the straight pipe section through the first working manhole, fix it to the multiple working holes through the lifting rope, open a second working manhole in the lower area of ​​the first straight pipe section, perform annular cutting in the first straight pipe section through the second working manhole, and lift it away from the first straight pipe section through the lifting equipment; Take the second straight pipe section at the position of the first straight pipe section, and repeat the lifting method of the first straight pipe section to dismantle the second straight pipe section until the dismantling of the discharge pipe is completed.

2. The method for dismantling the discharge pipe of the granulation tower system according to claim 1, Features: During the lifting operation of each straight pipe section, a plurality of working platforms are set up in the working hole on the straight pipe section, and the operating personnel move to the working platforms to perform cutting or fixing operations of the lifting ropes.

3. The method for dismantling the discharge pipe of the granulation tower system as claimed in claim 2, Features: When the working holes are opened, the plurality of working holes are symmetrically arranged on the discharge pipe, so that the working platform is arranged between the symmetrical working holes.

4. The method for dismantling the discharge pipe of the granulation tower system as claimed in claim 2, Features: When setting up the working platform, a supporting pipe is passed through the two working holes, and a working board is laid on the supporting pipe to form the working platform.

5. The method for dismantling the discharge pipe of the granulation tower system as claimed in claim 2, Features: The working platform is fixed in the discharge pipe by spot welding.

6. The method for dismantling the discharge pipe of the granulation tower system as claimed in claim 1, Features: Before cutting the elbow section and the straight pipe section in an annular shape, confirm that the weight of the elbow section and the straight pipe section is within the lifting range of the lifting equipment, and select the length of the elbow section and the straight pipe section on the premise that the weight of the elbow section and the straight pipe section is within the lifting range of the lifting equipment.

7. The method for dismantling the discharge pipe of the granulation tower system as claimed in claim 1, Features: Before dismantling the discharge pipe, a baffle is arranged at the outlet of the discharge pipe of the granulation tower to isolate the discharge at the outlet of the discharge pipe.

8. The method for dismantling the discharge pipe of the granulation tower system as claimed in claim 1, Features: Before the annular cutting operation is performed, the discharge pipe is checked and the annular cutting is made away from damaged parts.

9. The method for dismantling the discharge pipe of the granulation tower system as claimed in claim 1, Features: When the working hole is opened, the discharge pipe is checked and the working hole is made to avoid a damaged part.

10. The method for dismantling the discharge pipe of the granulation tower system as claimed in claim 1, Features: When the hoisting equipment is hoisting the elbow section and the straight pipe section, after the elbow section or the straight pipe section is hoisted away by a distance of 100 to 200 mm, the elbow section or the straight pipe section is kept suspended until the operator observes and confirms that the hoisting is completed.

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