Installation and construction method of double-group six-piece loop reactor

Abstract

The invention relates to an installation and construction method of a double-group six-piece loop reactor, which comprises the following steps: firstly, pre-positioning twelve straight pipe sections on the ground, and then combining and splicing the straight pipe sections with a large elbow, a communicating pipe and a connecting beam to form the six-piece loop reactor; every three sheets in the six-sheet loop reactor form one group and are fixedly connected and assembled to form two groups of loop integral modules; and each group of ring pipe integral modules is fixed in one or more hoisting frames for hoisting. All grouping and welding work are completed in a ground horizontal state, the equipment assembling and welding quality and working efficiency are improved, after modular assembling, overall hoisting and vertical installation in place can be directly carried out through a large hoisting machine, reinforcing is carried out through a #-shaped steel frame in the period, and the construction period is shortened. And the balance of equipment hoisting and the stability after hoisting are further improved. Due to the fact that high-altitude operation is avoided, the construction difficulty of equipment assembly can be greatly reduced, and the safety of a construction site is improved.

Description

Technical Field

[0001] The invention relates to the technical field of annular tube reactor installation, in particular to an installation and construction method of a double-group six-piece annular tube reactor. Background Art

[0002] At present, there are two ways to hoist the annular tube reactor: 1. Integral hoisting, which has higher requirements on the hoisting machinery and lifting ears of the equipment. 2. Slice hoisting, which is a combined hoisting method. This hoisting process assembles equipment and has greater requirements on the site. The two cylinders are combined into a sheet structure with poor overall rigidity and are prone to deformation. Cables are required to fix it after hoisting. The subsequent intermediate connecting beams are all high-altitude operations, and the construction safety factor is low, resulting in great construction difficulty, large investment in construction safety measures, and a long construction period. In addition, the conventional two-cylinder combined hoisting requires the erection of a large amount of scaffolding, which not only increases the amount of scaffolding erection and dismantling engineering and the labor of construction personnel, but also greatly increases the construction cost. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide an installation and construction method for a double-group six-piece annular tube reactor, which adopts a three-piece block-type hoisting method to reduce high-altitude operations and construction period.

[0004] In order to solve the above technical problems, the technical solution adopted by the present invention is: A method for installing and constructing a double-group six-piece annular tube reactor, wherein each annular tube reactor comprises two straight tube sections, a large elbow, a connecting pipe and a connecting beam, wherein two ends of the large elbow are respectively connected to one end port of the two straight tube sections, two ends of the connecting pipe are respectively connected to the two straight tube sections, and two ends of the connecting beam are respectively connected to the outer walls of the two straight tube sections, and there are six annular tube reactors in total, and three annular tube reactors are grouped together; the method for installing and constructing the annular tube reactor comprises: Step 1: pre-position twelve straight pipe sections on the ground, and then assemble the straight pipe sections with large elbows, connecting pipes, and connecting beams to form a six-piece annular tube reactor; Step 2: assemble three of the six loop tube reactors into a group to form two groups of loop tube integral modules; Step 3, making a hanging frame, on which a hanging lug is provided, and fixing each group of ring tube integral modules in one or more hanging frames; Step 4: Start hoisting. The hoisting device of the main crane is connected to the lifting lugs on the hoisting frame, and the hoisting device of the tail crane is connected to the lifting points on the annular tube reactor; the two sets of annular tube integral modules are hoisted into place and fixed respectively.

[0005] As a preferred embodiment, during the assembly process of the annular tube reactor, laser leveling equipment is used to perform precision control.

[0006] As a preferred embodiment, in step 2, during the assembly process, in order to ensure the accuracy of equipment assembly, cross-shaped sleepers are placed under the bottom of the annular tube reactor to contact and position it on the ground.

[0007] As a preferred embodiment, in step 2, laser leveling equipment is used to perform precision control during the assembly process.

[0008] As a preferred embodiment, in step 2, a plurality of H-shaped steels are added to the middle of each loop tube reactor for reinforcement.

[0009] As a preferred embodiment, two H-shaped steels are added near the upper hanging point and the lower hanging point of each loop tube reactor for reinforcement.

[0010] As a preferred embodiment, in step three, the hanging frame includes a rectangular outer frame and a crossbeam arranged in a "well" shape inside the rectangular outer frame, and the ends of the crossbeam are connected to the rectangular outer frame; the H-shaped steel on the annular tube reactor serves as an external connecting beam connected to the crossbeam of the hanging frame.

[0011] As a preferred embodiment, in step three, the three loop tube reactors in each group of loop tube integral modules are arranged in the hanging frame in such a way that two loop tube reactors are arranged in parallel on the left and right sides, and the other loop tube reactor is arranged at the front end or the rear end.

[0012] The present invention completes all teaming and welding work in a horizontal state on the ground, increases the quality and work efficiency of equipment assembly and welding, and after modular assembly, can be directly hoisted and installed in place by large-scale hoisting machinery as a whole, and during the process, a cross-shaped steel frame is used for reinforcement to further improve the balance of equipment hoisting and the stability after hoisting. Since there is no high-altitude operation, the construction difficulty of equipment assembly can be greatly reduced, and the safety of the construction site is improved. At the same time, through the combination of the double-group six-piece reactor structure, the amount of scaffolding required for hoisting operations can be effectively reduced, and the amount of subsequent disassembly and assembly engineering can be reduced. The double-group six-piece annular tube reactor has good rigidity after hoisting, and does not need to be fixed with cables, thereby shortening the construction period and greatly reducing the cost of construction operations. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The drawings herein are used to provide further explanation of the present invention and constitute a part of this application. The illustrative embodiments of the present invention and their description are used to explain the present invention and do not constitute improper limitations on the present invention.

[0014] Figure 1 It is a structural schematic diagram of a monolithic loop reactor provided by the present invention; Figure 2 It is a schematic diagram of the grouping of the six-piece loop reactor; Figure 3It is a schematic diagram of a group of ring pipe integral modules fixed in the lifting frame; Figure 4 This is a schematic diagram of the main sling rigging; Figure 5 This is a schematic diagram of the tail rigging.

[0015] In the figure, 1-straight pipe section, 2-large elbow, 3-connecting pipe, 4-connecting beam, 5-external connecting beam, 6-equipment support, 7-lifting frame, 8-lifting ear, 9-hook, 10-wire rope, 11-support beam, 12-shackle. DETAILED DESCRIPTION

[0016] In order to make those skilled in the art better understand the present invention, the present invention is further clearly and completely described below in conjunction with the accompanying drawings and embodiments. It should be noted that, in the absence of conflict, the features in the embodiments and examples of this application can be combined with each other.

[0017] A typical embodiment of the present invention provides a method for installing and constructing a double-group six-piece annular tube reactor. Figure 1 As shown, each loop tube reactor includes two straight pipe sections 1, a large elbow 2, a connecting pipe 3 and a connecting beam 4, the two ends of the large elbow 2 are respectively connected to one end port of the two straight pipe sections 1, the two ends of the connecting pipe 3 are respectively connected to the two straight pipe sections 1, the connecting pipe 3 is located close to one side of the large elbow 2, and an equipment support 6 for connecting to the equipment foundation is also provided on the straight pipe section 1, the two ends of the connecting beam 4 are respectively connected to the outer wall of the two straight pipe sections 1, and are used to fix the two straight pipe sections 1, and the number of the connecting beams 4 is more than two. The present invention relates to a total of six loop tube reactors, each three pieces forming a group.

[0018] Specifically, the annular tube reactor provided in this embodiment is composed of 12 slender straight pipe sections with a length of 41.7 meters and an inner diameter of Φ609.6 mm, a jacketed outer tube with an inner diameter of Φ690, 6 180° large elbows, connecting pipes and several connecting beams. The equipment weighs about 270 tons, which is an ultra-long and ultra-heavy equipment.

[0019] The installation and construction method of the above-mentioned double-group six-piece annular tube reactor provided in this embodiment includes the following steps.

[0020] Step 1: pre-position twelve straight pipe sections 1 on the ground, and then assemble the straight pipe sections 1 with the large elbow 2, the connecting pipe 3, and the connecting beam 4 to form a six-piece annular tube reactor.

[0021] In this step, firstly, according to the final design layout of the annular tube reactor, a truck crane is used to pre-position the twelve straight pipe sections 1 on the ground, and then they are assembled on the ground with the large elbow 2, connecting pipe 3, and connecting beam 4, and then laser leveling equipment is used for precision control.

[0022] Step 2, such as Figure 2 As shown, three pieces of the six-piece annular tube reactor are fixedly assembled as a group to form two groups of annular tube integral modules.

[0023] In this step, the annular tube groups of the six groups of reactors are fixedly assembled on the ground and assembled as a whole to form an annular tube integral module. During the assembly process, to ensure the assembly accuracy of the equipment, cross-shaped sleepers can be placed under the bottom of the annular tube reactor body to contact and position it with the ground, making the equipment more flat and firm and preventing deformation.

[0024] During the assembly process, laser leveling equipment is used for precision control. In addition, attention should be paid to whether the equipment body has settled and whether the legs are suspended.

[0025] After the implementation of step 2 is completed, a layer of scaffolding is set up to insulate the two sets of ring pipe integral modules.

[0026] Since the loop reactor involved in the present invention is a slender device, in order to prevent the device from being deformed during the hoisting process, In a preferred embodiment, a plurality of H-shaped steels are added in the middle of each loop reactor for reinforcement. In addition, two H-shaped steels are added near the upper and lower hanging points of each loop reactor for reinforcement. For example, eight H-shaped steels can be added to the four sides of the middle of the equipment, the lower layer of the top hanging point, and the upper layer of the bottom hanging point for reinforcement. Another function of the above H-shaped steel is to be connected to the hoisting frame 7 as an external connecting beam 5.

[0027] The connecting beam 4 serves as an auxiliary balancing position to ensure that the horizontal plane of the equipment in contact with the ground is consistent after the equipment is hoisted, thereby suppressing deformation of the equipment during hoisting and improving the overall rigidity of the equipment.

[0028] Step three: manufacturing a hanging frame 7 , on which hanging ears 8 are provided, and fixing each group of annular tube integrity modules in one or more hanging frames 7 .

[0029] like Figure 3 As shown, the hanging frame 7 includes a rectangular outer frame and a crossbeam arranged in a "well" shape inside the rectangular outer frame, and the ends of the crossbeam are connected to the rectangular outer frame; the H-shaped steel on the annular tube reactor is connected to the crossbeam of the hanging frame as an external connecting beam 5, and the lifting lug 8 is welded to the main beam of the hanging frame 7.

[0030] Step 4, start hoisting, the hoisting device of the main crane is connected to the lifting lug 8 on the hoisting frame 7, and the hoisting device of the tail crane is connected to the lifting point on the loop tube reactor; the two sets of loop tube integral modules are hoisted into place and fixed respectively.

[0031] In this step, after all the equipment is assembled, a large crawler crane is used as the main crane, and a crawler crane of appropriate tonnage is selected as the auxiliary crane. Figure 4 The main lifting sling and tail sling shown in the figure, when the annular tube reactor is hoisted, since the heights of the four lifting points are inconsistent, in order to ensure the smooth lifting of the equipment, the four lifting points of the equipment can be connected through the lifting points, and lubricating oil can be applied to the outside of the pulley, so that the top lifting point of the equipment can maintain balance through its own weight during the lifting process.

[0032] After the loop reactor equipment is fully in place and fixed, a comprehensive inspection is carried out, including whether there is any damage on the equipment surface, whether the connection parts are firm, whether the pipeline is unobstructed, etc. After the inspection is qualified, the equipment is debugged, including testing the operating parameters of the equipment, checking the sealing of the equipment, etc., to ensure that the equipment can operate normally and meet the design requirements.

[0033] This embodiment adopts prefabricated modules and assembles them on the ground for modular assembly to form a double-headed symmetrical combination module, which is convenient for overall alignment of the equipment and improves the stability of equipment hoisting. Laser leveling can be used during assembly to perform precision control, effectively ensuring the assembly accuracy of the double-group six-piece annular tube reactor. The lifting point frame 7 can control the height of the equipment by its own weight during hoisting, which solves the problem of inconsistent height of the equipment lifting points and enables the equipment to be hoisted smoothly and with better balance.

[0034] The scope of protection claimed by the present invention is not limited to the above specific embodiments. For those skilled in the art, the present invention may have various deformations and changes. Any modifications, improvements and equivalent substitutions made within the concept and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A method for installing and constructing a double-group six-piece annular tube reactor, characterized in that: Each loop tube reactor comprises two straight tube sections, a large elbow, a connecting pipe and a connecting beam. The two ends of the large elbow are respectively connected to one end of the two straight tube sections, the two ends of the connecting pipe are respectively connected to the two straight tube sections, and the two ends of the connecting beam are respectively connected to the outer walls of the two straight tube sections. There are six loop tube reactors in total, and three of them are grouped together. The installation and construction methods include: Step 1: pre-position twelve straight pipe sections on the ground, and then assemble the straight pipe sections with large elbows, connecting pipes, and connecting beams to form a six-piece annular tube reactor; Step 2: assemble three of the six loop tube reactors into a group to form two groups of loop tube integral modules; Step 3, making a hanging frame, on which a hanging lug is provided, and fixing each group of ring tube integral modules in one or more hanging frames; Step 4: Start hoisting. The hoisting device of the main crane is connected to the lifting lugs on the hoisting frame, and the hoisting device of the tail crane is connected to the lifting points on the annular tube reactor; the two sets of annular tube integral modules are hoisted into place and fixed respectively.

2. The installation and construction method of the double-group six-piece annular tube reactor according to claim 1, characterized in that: In step 1, during the assembly process of the annular tube reactor, laser leveling equipment is used for precision control.

3. The installation and construction method of the double-group six-piece annular tube reactor according to claim 2 is characterized in that: In step 2, during the assembly process, in order to ensure the accuracy of equipment assembly, cross-shaped sleepers are placed under the bottom of the annular tube reactor to contact the ground for positioning.

4. The installation and construction method of the double-group six-piece annular tube reactor according to claim 3 is characterized in that: In step 2, laser leveling equipment is used to perform precision control during the assembly process.

5. The installation and construction method of the double-group six-piece annular tube reactor according to claim 1 or 4, characterized in that: In step 2, a plurality of H-shaped steels are added to the middle of each loop tube reactor for reinforcement.

6. The installation and construction method of the double-group six-piece annular tube reactor according to claim 5, characterized in that: Two H-shaped steels are added near the upper hanging point and the lower hanging point of each annular tube reactor for reinforcement.

7. The installation and construction method of the double-group six-piece annular tube reactor according to claim 6 is characterized in that: In step three, the hoisting frame includes a rectangular outer frame and a crossbeam arranged in a "well" shape inside the rectangular outer frame, and the ends of the crossbeam are connected to the rectangular outer frame; the H-shaped steel on the annular tube reactor is connected to the crossbeam of the hoisting frame as an external connecting beam.

8. The installation and construction method of the double-group six-piece annular tube reactor according to claim 1 or 7, characterized in that: In step three, the three loop tube reactors in each group of loop tube integral modules are arranged in the hanging frame in the following manner: two loop tube reactors are arranged in parallel on the left and right sides, and the other loop tube reactor is arranged at the front end or the rear end.

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