Hoisting construction method for multiple horizontal reactors

Abstract

The present invention discloses a method for hoisting and constructing multiple horizontal reactors, and relates to the technical field of equipment hoisting. The horizontal reactors include two oxidation reactors and an epoxidation reactor; the two oxidation reactors consist of a primary oxidation reactor and a secondary oxidation reactor. The main crane first hoists the first oxidation reactor and the epoxidation reactor in a first hoisting construction area, and then hoists the second oxidation reactor in a second hoisting construction area. The main crane completes the hoisting of multiple devices at one station, which not only shortens the time for changing the hoisting working conditions and transferring, but also reduces the progress delay problem caused by the foundation reservation required for equipment hoisting. In addition, it can reduce the foundation treatment replacement area and save the foundation treatment machinery fee and material fee.

Description

Technical Field

[0001] The invention relates to the technical field of equipment hoisting, in particular to a method for hoisting a plurality of horizontal reactors. Background Art

[0002] During the installation of chemical plant equipment, many devices are large in size and overweight, which places higher requirements on lifting technology and lifting innovation.

[0003] For example, a horizontal reactor in a certain engineering project primarily includes an oxidation reactor and an epoxidation reactor. The oxidation reactor has an inner diameter of 9,010 mm, a maximum length of 35,530 mm, a maximum weight of 649.96 t, and a wall thickness of 34 mm. Due to its large diameter, heavy weight, and thin walls, the traditional hoisting method, with its locks and mountings, is difficult to install. Furthermore, the horizontal reactor's foundation is often surrounded by a steel structure and other equipment to be installed, resulting in a relatively narrow hoisting area. This makes the installation of large cranes challenging, and the planning and selection of the hoisting plan can severely impact construction safety, efficiency, and progress. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a method for hoisting and constructing multiple horizontal reactors. By optimizing the hoisting scheme, multiple devices can be hoisted at one location to improve construction efficiency.

[0005] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0006] A method for hoisting and constructing multiple horizontal reactors, wherein the horizontal reactors include two oxidation reactors and an epoxidation reactor; the two oxidation reactors consist of a primary oxidation reactor and a secondary oxidation reactor, the primary oxidation reactor and the secondary oxidation reactor are arranged in parallel in a horizontal direction in an oxidation reactor installation area; the epoxidation reactors are arranged in parallel and installed in the epoxidation reactor installation area; the epoxidation reactor installation area is located outside the primary oxidation reactor; a first hoisting construction area is formed between the epoxidation reactor installation area and the oxidation reactor installation area, and a second hoisting construction area is formed outside the secondary oxidation reactor; the hoisting construction method for the oxidation reactor and the epoxidation reactor described above includes the following steps:

[0007] Step 1: The main crane is positioned on the road outside the front end of the first hoisting construction area, and the primary oxidation reactor placed vertically is lifted from the transport vehicle for trial lifting, and the bottom of the primary oxidation reactor is lifted 0.5m above the equipment foundation; the main crane moves along the first hoisting construction area, and when the primary oxidation reactor approaches the frame foundation of the epoxidation reactor, the primary oxidation reactor is rotated clockwise to avoid the frame foundation of the epoxidation reactor; the main crane continues to move along the first hoisting construction area to the side of the equipment foundation, and the main crane rotates clockwise so that the primary oxidation reactor is located directly above the equipment foundation, and the orientation of the primary oxidation reactor is adjusted to install it on the equipment foundation; the main crane continues to lift the epoxidation reactors separately in situ, adjusts the position of each epoxidation reactor and installs it in place;

[0008] Step 2: The main crane moves to the road outside the second hoisting construction area, and tries to lift the longitudinally placed secondary oxidation reactor from the transport vehicle, raising the bottom of the secondary oxidation reactor to 0.5m above the equipment foundation; the main crane moves along the second hoisting construction area and rotates clockwise so that the second oxidation reactor is located directly above the equipment foundation, and adjusts the orientation of the secondary oxidation reactor to install it on the equipment foundation.

[0009] Furthermore, in step one, during the trial lift, the main crane lifts the main hook up 0.1m, and formal lifting begins after ensuring safety; the main crane continues to lift the main hook so that the bottom of the primary oxidation reactor is 0.5m higher than the transport vehicle, and the transport vehicle leaves the lifting site.

[0010] Furthermore, in step 2, during the trial lift, the main crane lifts the main hook up 0.1m, and formal lifting begins after ensuring safety; the main crane continues to lift the main hook so that the bottom of the secondary oxidation reactor is 0.5m higher than the transport vehicle, and the transport vehicle leaves the lifting site.

[0011] Furthermore, five saddles are provided at the bottom of the oxidation reactor, among which the middle saddle is a fixed end and the four saddles at both ends are sliding ends; a sliding steel plate is provided on the equipment base at the bottom of the sliding end, and two layers of polytetrafluoroethylene plates are placed between the sliding steel plate and the saddle. The thermal displacement of the sliding end of the oxidation reactor is met by sliding between the polytetrafluoroethylene plates.

[0012] Furthermore, a shim group is provided at the lower part of the saddle, and the height of the shim group is 30-70 mm.

[0013] Furthermore, the oxidation reactor is provided with tubular shaft type lifting ears, which are arranged on both sides of the center dividing surface of the oxidation reactor.

[0014] Furthermore, the tubular shaft type lifting ear includes a pad, a cross-shaped rib plate, a tubular shaft, an outer baffle plate and an outer rib plate; during installation, the pad is first welded to the outer tube wall of the oxidation reactor, the inner side of the cross-shaped rib plate is welded to the outer tube wall of the oxidation reactor, a single-sided 55° groove is opened on the inner side of the tubular shaft and welded to the outer tube wall of the oxidation reactor and the inner ring edge of the pad, the outer edge connecting end of the cross-shaped rib plate is welded to the inner wall of the tubular shaft, the circular outer baffle plate is welded to the outer wall of the tubular shaft, and the outer rib plate is welded to the outer wall of the tubular shaft and the outer baffle plate.

[0015] Furthermore, a wide-body shackle is used to connect the main steel wire rope connecting the main hook of the main crane and the main hoisting steel wire rope connecting the oxidation reactor equipment or the epoxidation reactor. The wide-body shackle includes a shackle body and a pin shaft installed on the shackle body, and a pin shaft sleeve with a diameter of 500 mm is added to the periphery of the pin shaft.

[0016] By optimizing the lifting scheme, the present invention uses a crawler crane as the main crane to complete the lifting of multiple equipment at one time, which not only shortens the time for changing the lifting working conditions and transferring, but also reduces the progress delay caused by the foundation reservation required for equipment lifting. In addition, it can reduce the foundation treatment and replacement area, saving the foundation treatment machinery and material costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a hoisting plan view of the present invention;

[0018] Figure 2 This is a schematic diagram of the structure of adding a pin shaft sleeve to the shackle;

[0019] Figure 3 This is a schematic diagram of the installation of a tubular shaft lifting eye;

[0020] Figure 4 This is a schematic diagram of the connection between the equipment foundation and the sliding end of the saddle.

[0021] In the figure, 1-primary oxidation reactor, 2-secondary oxidation reactor, 3-epoxidation reactor, 4-oxidation reactor installation area, 5-epoxidation reactor installation area, 6-first hoisting construction area, 7-second hoisting construction area, 8-epoxidation reactor frame foundation, 9-main crane, 10-equipment foundation, 11-pad, 12-cross rib plate, 13-pipe shaft, 14-outer baffle, 15-outer rib plate, 16-outer cylinder wall of oxidation reactor, 17-shackle body, 18-pin shaft, 19-pin shaft sleeve, 20-saddle, 21-sliding steel plate, 22-polytetrafluoroethylene plate. DETAILED DESCRIPTION

[0022] A typical embodiment of the present invention provides a method for hoisting and constructing multiple horizontal reactors. The multiple horizontal reactors include two oxidation reactors and at least three epoxidation reactors. Referring to Figure 1, the two oxidation reactors are composed of a primary oxidation reactor 1 and a secondary oxidation reactor 2, which are arranged horizontally and parallel to an oxidation reactor installation area 4; the epoxidation reactor 3 is arranged horizontally and parallel to an epoxidation reactor installation area 5; the epoxidation reactor installation area 5 is located outside the primary oxidation reactor 1.

[0023] A first hoisting construction area 6 is formed between the epoxidation reactor installation area 5 and the oxidation reactor installation area 4 , and a second hoisting construction area 7 is formed outside the secondary oxidation reactor 2 .

[0024] The above-mentioned method for hoisting and constructing the oxidation reactor and the epoxidation reactor comprises the following steps.

[0025] Step 1: hoisting the primary oxidation reactor 1 and the epoxidation reactor 3;

[0026] The main crane 9 is positioned on the road outside the front end of the first hoisting construction area 6, and tries to lift the longitudinally placed primary oxidation reactor 1 from the transport vehicle, and lifts the primary oxidation reactor 1 so that its bottom is 0.5m higher than the equipment foundation; the main crane 9 moves along the first hoisting construction area 6, and when the primary oxidation reactor 1 approaches the epoxidation reactor frame foundation 8, the primary oxidation reactor 1 is rotated clockwise to avoid the epoxidation reactor frame foundation 8; the main crane 9 continues to move along the first hoisting construction area 6 to the side of the equipment foundation 10, the main crane 9 rotates clockwise and positions the primary oxidation reactor equipment directly above the equipment foundation 10, adjusts the orientation of the primary oxidation reactor 1 and installs it on the equipment foundation 10; the main crane 9 continues to lift each epoxidation reactor 3 separately in situ, adjusts the position of each epoxidation reactor 3 and installs it in place.

[0027] Step 2: hoisting the secondary oxidation reactor;

[0028] After the primary oxidation reactor 1 and epoxidation reactor 3 are hoisted, the main crane 9 exits the first hoisting construction area and moves to the road outside the second hoisting construction area 7. It then conducts a trial lift of the longitudinally positioned secondary oxidation reactor 2 from the transport vehicle and elevates the secondary oxidation reactor 2 so that its bottom is 0.5 m above the equipment foundation. The main crane 9 then moves along the second hoisting construction area 7 and rotates clockwise so that the secondary oxidation reactor 2 is directly above the equipment foundation 10. The secondary oxidation reactor 2 is then adjusted and installed on the equipment foundation 10.

[0029] Taking the applicant's PO / SM project as an example, the ethylbenzene oxidation unit in this project has two reactors that are both oversized and heavy. The main technical parameters of the two reactors are shown in the table below.

[0030] Main technical parameters of the equipment

[0031] Serial number Equipment tag Device Name Specifications (mm) Net weight (t) Installation elevation (m) Equipment basic form 1 RM-1240 Primary oxidation reactor Φ9010×39290 639.93t 2.030m Block concrete foundation 2 RM-1250 Secondary oxidation reactor Φ9010×39990 649.96t 1.330m Block concrete foundation

[0032] 1. Determination of lifting technology

[0033] Selection of lifting machinery and methods:

[0034] Based on the equipment transportation requirements and site conditions, a XCMG XGC16000 crawler crane (1250t capacity) was selected as the main crane 9 to lift the primary oxidation reactor 1 and the secondary oxidation reactor 2. A 260t crawler crane was used as an auxiliary tool for counterweight transportation and crane assembly. After the equipment was transported to the designated location on the construction site, it was directly hoisted into place using the crawler crane.

[0035] The hoisting process for the oxidation reactors using a single XCMG XGC16000 crawler crane is as follows: the XGC16000 crawler crane lifts the two oxidation reactors vertically above the equipment installation foundation height, then rotates the two oxidation reactors and installs them at the installation elevation. After the equipment is aligned and leveled, the hoisting operation is completed, and the XGC16000 crawler crane removes the hook.

[0036] Selection of lifting site:

[0037] The equipment foundation 10 of the primary oxidation reactor 1 and the secondary oxidation reactor 2 are both block concrete foundations, and the hoisting space at the equipment installation location is relatively limited. The foundations of the two oxidation reactors are surrounded by steel structure frames. Figure 1 For example, the hoisting construction areas of the two oxidation reactors are located on the north side of the foundation of the RM-1240 primary oxidation reactor and on the south side of the foundation of the RM-1250 secondary oxidation reactor.

[0038] It is necessary to reasonably arrange each link of the oxidation reactor hoisting according to the actual conditions inside and outside the site, the structural parameters of the oxidation reactor, the installation position and weight of the oxidation reactor, so as to shorten the hoisting time.

[0039] Before hoisting the equipment, you should first confirm that the foundation bearing capacity of the hoisting construction area and the crane travel area meets the hoisting requirements and passes the foundation bearing capacity test.

[0040] 2. Hoisting process of multiple horizontal equipment

[0041] Hoisting process of primary oxidation reactor 1 and epoxidation reactor 3:

[0042] The crawler crane is positioned at the designated location, and the main lifting rigging and slip rope are set. The primary oxidation reactor 1 is transported to the lifting location (on the road outside the lifting construction area) for a trial lift. The crawler crane's main hook is raised horizontally by 0.1m. Once safety is confirmed, the formal lifting begins. The crawler crane continues to raise the main hook until the bottom of the equipment is 0.5m above the transport vehicle, which then drives away from the lifting site. The bottom of the primary oxidation reactor is further raised by 0.5m above the installed equipment foundation. The crawler crane raises or lowers the boom within a range of 12m-18m, laying the roadbed in the area reserved for the transport vehicle. The crawler crane then travels 6.7m east along the first lifting construction area 6, rotating the primary oxidation reactor 1 clockwise and slewing it to prevent collision with the epoxidation reactor frame foundation 8. The crawler crane continues to move 23.6m eastward along the first hoisting construction area 6. The crawler crane rotates clockwise and lies down to a hoisting radius of 18m so that the equipment is directly above the equipment foundation. The equipment is adjusted in position and installed in place. Finally, the main hoisting rope is removed.

[0043] Then, multiple epoxidation reactors 3 on the north side are hoisted in the first hoisting construction area 6 .

[0044] Hoisting process of secondary oxidation reactor 2

[0045] The crawler crane positioned itself at the designated location and set up the main lifting rigging and slip rope. The secondary oxidation reactor 2 was transported to the lifting location (on the road outside the lifting construction area) for a trial lift. The crawler crane's main hook lifted the secondary oxidation reactor 2 horizontally by 0.1m. Once safety was confirmed, the formal lifting began. The crawler crane continued to raise the main hook until the bottom of the secondary oxidation reactor 2 was 0.5m above the equipment foundation. The crawler crane traveled 3m east along the second lifting construction area 7. The crawler crane's boom rotated clockwise to adjust the orientation of the secondary oxidation reactor 2 and install it in place. Finally, the main lifting rope was removed.

[0046] Due to limited lifting space and the difficulty of installation, the primary oxidation reactor 1 was transported to the lifting location and lifted before the roadbed was laid. The crawler crane then moved to the installation location for lifting, requiring a smooth and unobstructed transport path. Equipment within the main crane's boom swing range was installed after both the oxidation reactor and epoxidation reactor 3 were hoisted into place. Before installation, temporary platforms were set up on both sides of the equipment foundation to meet safety requirements.

[0047] The two oxidation reactors were hoisted sequentially, with the primary oxidation reactor 1 and the secondary oxidation reactor 2 arriving on site in sequence. Crawler cranes were positioned in advance before the primary and secondary oxidation reactors arrived. After the equipment was unloaded, the transport vehicles withdrew from the site, and the equipment was placed directly on the pre-installed foundation.

[0048] Foundation treatment requirements

[0049] According to the geotechnical engineering investigation report of this project, if the bearing capacity of the original soil cannot meet the lifting requirements, foundation treatment is required.

[0050] For example, in the project described in this embodiment, the ground bearing capacity of the original soil is 8t / m2, which cannot meet the lifting requirements. After foundation treatment, the ground bearing capacity of the lifting area needs to reach 17.28t / m2, and the ground bearing capacity of the walking area needs to reach 11.7t / m2.

[0051] (1) Foundation treatment area

[0052] The large equipment lifting site includes: a lifting operation area, a crane travel route area, and a crane assembly area; the lifting operation area includes a first lifting construction area 6 and a second lifting construction area 7.

[0053] (2) Crawler crane foundation treatment method

[0054] Foundation treatment method for crane hoisting site: Dig down to a depth of 2m, then fill with rubble stone (rubble stone specifications are approximately φ300mm). Each layer of rubble stone is filled with natural graded sand and gravel, and then vibrated and compacted layer by layer using a 20t roller. The layered compaction thickness is 250mm-350mm per layer. The upper layer is filled with crushed stone to a height of 300mm and vibrated and compacted using a 20t roller. After each layer is completed, a density test is required, requiring a compaction coefficient of ≥0.97. Only after passing the test can the next cushion layer be constructed. Ensure that the treated ground elevation is approximately 50mm higher than the surrounding area. Finally, the crane roadbed is laid on top for hoisting.

[0055] (3) Requirements for foundation treatment when the crane is traveling without load:

[0056] Treatment method for walking area: dig down to a depth of 1.0m, backfill with blocks in layers, fill the gaps of each layer with sand and gravel, and use a 20t roller to vibrate and compact the layers in layers. The layer thickness is 250mm-350mm, and the compaction coefficient is not less than 0.97. 200mm-300mm crushed stone is laid on top for leveling. The final foundation treatment elevation is required to be level with the formal road surface, and finally the crane roadbed is laid on top.

[0057] In this embodiment, the primary oxidation reactor 1 has a reinforcement ring on its cylinder. When the wire rope is directly attached to the hook, the reinforcement ring will cut the wire rope, increasing the wire rope diameter, tensile strength, and lifting lug load requirements. Therefore, while ensuring that the angle between the wire ropes is less than 60°, a 14.5m long supporting balance beam is added to improve the effective force-bearing efficiency of the wire rope clip and lifting lug, preventing the equipment reinforcement ring from cutting the wire rope.

[0058] The main wire rope connecting the main crane hook and the main wire rope connecting the oxidation reactor equipment or epoxidation reactor are connected by a 400t wide shackle. The wide shackle includes a shackle body 17 and a pin 18 installed on the shackle body 17. Figure 2 As shown, a pin shaft sleeve 19 with a diameter of 500 mm is added to the periphery of the pin shaft 18 to increase the efficiency coefficient of the wire rope buckle.

[0059] During the hoisting process, the balance beam was constructed from Ø600×20mm steel pipe, made of Q345B steel, and 14.5m long. The balance beam passed strength and stability checks. After fabrication, the balance beam underwent nondestructive testing.

[0060] Because the oxidation reactor equipment has a large diameter, heavy weight and thin wall thickness, it is difficult to hang the lock using the traditional hoisting method, and the wall thickness and weight of the equipment do not meet the hoisting requirements, so the solution of adding lifting ears is considered for hoisting.

[0061] Four symmetrical, tubular lifting lugs are used, each designed to bear 180 tons. These lugs are located on either side of the center plane of the oxidation reactor, aligned with the equipment saddle. The saddle's pad is extended and connected to the lug pad, distributing the load on the equipment cylinder. The pad is perforated along the circumference of the lug and plug-welded to the equipment cylinder.

[0062] like Figure 3 As shown, the aforementioned tubular shaft lifting lug comprises a backing plate 11, a cross-shaped rib plate 12, a tubular shaft 13, an outer baffle plate 14, and an outer rib plate 15. During installation, the backing plate 11 is first welded to the outer wall 16 of the oxidation reactor. The inner side of the cross-shaped rib plate 12 is welded to the outer wall 16 of the oxidation reactor. A single 55° groove is formed on the inner side of the tubular shaft 13 and welded to the outer wall 16 of the oxidation reactor and the inner edge of the backing plate 11. The outer edge of the cross-shaped rib plate 12 is welded to the inner wall of the tubular shaft 13. The annular outer baffle plate 14 is welded to the outer wall of the tubular shaft 13. The outer rib plate 15 is welded to the outer wall of the tubular shaft 13 and the outer baffle plate 14. The tubular shaft 13 is made of coil-welded steel plate.

[0063] The oxidation reactor is large in size and weight. When filled with water, its mass can reach 3178.465t, which increases the friction on the sliding end. Each oxidation reactor is designed with 5 saddles 20, of which the middle saddle 20 is the fixed end and the four saddles 20 at both ends are sliding ends. A 20mm thick sliding steel plate 21 is set on the equipment base at the bottom of the sliding end. Figure 4 As shown, two layers of 10 mm polytetrafluoroethylene plates 22 are placed between the sliding steel plate 21 and the saddle 20. The friction coefficient between the polytetrafluoroethylene plates 22 is the smallest, and the sliding amount of the oxidation reactor equipment is met by sliding between the polytetrafluoroethylene plates 22 and the polytetrafluoroethylene plates 22.

[0064] A shim group is provided at the bottom of the saddle. Specifically, the shims in the shim group are provided under the saddle reinforcement ribs. The center distance between two adjacent shim groups is no more than 500 mm, and the height of the shim group is 30-70 mm.

[0065] The number of shims in each shim group shall not exceed 5 pieces. The shims shall be flat shims and inclined shims with a specification of 300mm long and 100mm wide. They shall be set at intervals of no more than 500mm on both sides of each anchor bolt and under each reinforced rib of the saddle. In combination with the diameter and number of the equipment anchor bolts, the strength of the foundation concrete and the weight of the equipment, check that the shim area and the number of shims are in compliance with the requirements. Flat shims shall be set under the inclined shims, with the thickest ones at the bottom and the thin ones in the middle. The inclined shims shall be used in pairs facing each other, with a lap length of no less than 3 / 4 of the total length. After the oxidation reactor is installed, adjust the tightness of the shims again. The shims near the four corners of the saddle bottom plate shall be subjected to less force than the shims in the middle of the saddle to avoid excessive local force on the polytetrafluoroethylene plate due to the bottom plates of the five saddles not being in the same plane.

Claims

1. A method for hoisting and constructing multiple horizontal reactors, wherein the horizontal reactors include two oxidation reactors and an epoxidation reactor; the two oxidation reactors are composed of a primary oxidation reactor and a secondary oxidation reactor, the primary oxidation reactor and the secondary oxidation reactor are arranged in parallel in a transverse oxidation reactor installation area; the epoxidation reactors are arranged in parallel and installed in the epoxidation reactor installation area; the epoxidation reactor installation area is located outside the primary oxidation reactor; and the method is characterized in that: A first hoisting construction area is formed between the epoxidation reactor installation area and the oxidation reactor installation area, and a second hoisting construction area is formed outside the secondary oxidation reactor. The hoisting construction method of the oxidation reactor and the epoxidation reactor described above comprises the following steps: Step 1: The main crane is positioned on the road outside the front end of the first hoisting construction area, and the primary oxidation reactor placed vertically is lifted from the transport vehicle for trial lifting, and the bottom of the primary oxidation reactor is lifted 0.5m above the equipment foundation; the main crane moves along the first hoisting construction area, and when the primary oxidation reactor approaches the frame foundation of the epoxidation reactor, the primary oxidation reactor is rotated clockwise to avoid the frame foundation of the epoxidation reactor; the main crane continues to move along the first hoisting construction area to the side of the equipment foundation, and the main crane rotates clockwise so that the primary oxidation reactor is located directly above the equipment foundation, and the orientation of the primary oxidation reactor is adjusted to install it on the equipment foundation; the main crane continues to lift the epoxidation reactors separately in situ, adjusts the position of each epoxidation reactor and installs it in place; Step 2: The main crane moves to the road outside the second hoisting construction area, and tries to lift the longitudinally placed secondary oxidation reactor from the transport vehicle, raising the bottom of the secondary oxidation reactor to 0.5m above the equipment foundation; the main crane moves along the second hoisting construction area and rotates clockwise so that the second oxidation reactor is located directly above the equipment foundation, and adjusts the orientation of the secondary oxidation reactor to install it on the equipment foundation.

2. The method for hoisting and installing multiple horizontal reactors according to claim 1, wherein: In step one, during the trial lift, the main crane lifts the main hook up to 0.1m, and formal lifting begins after ensuring safety; the main crane continues to lift the main hook so that the bottom of the primary oxidation reactor is 0.5m higher than the transport vehicle, and the transport vehicle leaves the lifting site.

3. The method for hoisting and installing multiple horizontal reactors according to claim 2, wherein: In step 2, during the trial lift, the main crane lifts the main hook up 0.1m, and formal lifting begins after ensuring safety; the main crane continues to lift the main hook so that the bottom of the secondary oxidation reactor is 0.5m higher than the transport vehicle, and the transport vehicle leaves the lifting site.

4. The method for hoisting and installing multiple horizontal reactors according to claim 3, wherein: There are five saddles at the bottom of the oxidation reactor, among which the middle saddle is a fixed end and the four saddles at both ends are sliding ends; a sliding steel plate is provided on the equipment base at the bottom of the sliding end, and two layers of polytetrafluoroethylene plates are placed between the sliding steel plate and the saddle. The sliding amount of the oxidation reactor is met by sliding between the polytetrafluoroethylene plates.

5. The method for hoisting and installing multiple horizontal reactors according to claim 4, wherein: A shim group is provided at the lower part of the saddle, and the height of the shim group is 30-70mm.

6. The method for hoisting and installing multiple horizontal reactors according to claim 1 or 4, characterized in that: The oxidation reactor is provided with a tubular shaft type lifting lug, which is arranged on both sides of the center dividing surface of the oxidation reactor.

7. The method for hoisting and installing multiple horizontal reactors according to claim 6, wherein: The tubular shaft type lifting ear includes a pad, a cross-shaped rib plate, a tubular shaft, an outer baffle plate and an outer rib plate; during installation, the pad is first welded to the outer tube wall of the oxidation reactor, the inner side of the cross-shaped rib plate is welded to the outer tube wall of the oxidation reactor, a single-sided 55° groove is opened on the inner side of the tubular shaft and welded to the outer tube wall of the oxidation reactor and the inner edge of the pad, the outer edge connecting end of the cross-shaped rib plate is welded to the inner wall of the tubular shaft, the circular outer baffle plate is welded to the outer wall of the tubular shaft, and the outer rib plate is welded to the outer wall of the tubular shaft and the outer baffle plate.

8. The method for hoisting and installing multiple horizontal reactors according to claim 7, wherein: A wide-body shackle is used to connect the main steel wire rope connecting the main hook of the main crane and the main hoisting steel wire rope connecting the oxidation reactor equipment or the epoxidation reactor. The wide-body shackle includes a shackle body and a pin shaft installed on the shackle body, and a pin shaft sleeve with a diameter of 500 mm is added to the periphery of the pin shaft.

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