Modular shifting construction method for air cooler and auxiliary pipe gallery

Abstract

The invention discloses a modular shifting construction method for an air cooler and an auxiliary pipe gallery, the air cooler and the auxiliary pipe gallery are divided into a plurality of hoisting modules, the hoisting modules comprise a plurality of pipe bundles, a plurality of air cooler framework modules and a plurality of auxiliary pipe gallery modules, the hoisting modules are systematically checked, and an unstable system is temporarily reinforced; a frame type balance lifting appliance is designed and used for modular lifting, a ground crane is matched with an air cooler and an auxiliary pipe gallery to conduct modular dismantling, modular lifting and modular assembling of all lifting modules, a traditional construction method that scattered parts are dismantled and then assembled is replaced, the lifting frequency is greatly reduced, the use number of construction machines is reduced, and the construction efficiency is improved. According to the air cooler and auxiliary pipe gallery moving system, high-altitude lifting operation is reduced, the air cooler and auxiliary pipe gallery moving construction period is greatly shortened, meanwhile, the frame type balance lifting tool is adopted, the overall stability of the air cooler and auxiliary pipe gallery modularized lifting system is guaranteed, and the safety and quality of air cooler and auxiliary pipe gallery moving construction are guaranteed.

Description

Technical Field

[0001] This invention relates to the field of dismantling and installation of air coolers and auxiliary pipe racks in petrochemical plants. More specifically, it relates to a modular dismantling and relocation construction method for air coolers and auxiliary pipe racks in petrochemical plant capacity expansion and technical renovation projects. Background Technology

[0002] Air coolers are key cooling equipment in large plants or facilities such as oil refineries and chemical plants. Generally, air coolers are arranged in rows and at the same height above the main pipe corridor or on the top floor of the structure. To meet process requirements, the air coolers are evenly distributed on both sides of the tower as the center line, which saves space and meets the process requirement of "step-by-step" from the top of the tower to the air cooler to the reflux tank.

[0003] When expanding or upgrading petrochemical plants, it is often necessary to add new towers and their associated air coolers and auxiliary pipe racks. Expansion projects typically reuse existing air coolers and auxiliary pipe racks, adding additional air coolers and auxiliary pipe racks to meet capacity requirements. The new air coolers operate in parallel with the reused ones. The new air cooler frame is added above the main pipe rack or on the top layer of the new tower structure. Simultaneously, the existing reused air coolers and auxiliary pipe racks need to be removed and relocated to the new frame before the new air coolers and auxiliary pipe racks are installed. The final arrangement of the air coolers and auxiliary pipe racks should be such that they are evenly distributed on both sides of the tower as the center line.

[0004] Modular dismantling and relocation of air coolers and their associated pipe racks is a crucial construction phase in petrochemical plant capacity expansion and renovation projects. Conventional methods involve protectively dismantling the air cooler tube bundles, steel structure frame, fans, and associated cables and pipe racks into individual components, which are then assembled piece by piece. For capacity expansion and renovation projects, this approach results in a large workload for hoisting, strenuous high-altitude operations, a long construction period, and high costs. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide a modular dismantling and relocation construction method for air coolers and auxiliary pipe racks. The method involves dividing the air cooler and auxiliary pipe racks into several hoisting modules and then using a ground crane to assist in the modular relocation construction of the air cooler and auxiliary pipe racks. This reduces the need for high-altitude hoisting, shortens the construction period, reduces construction costs, and achieves the goal of improving the efficiency of the relocation construction of air coolers and auxiliary pipe racks.

[0006] To solve the above technical problems, the technical solution adopted by the present invention is as follows: A modular relocation construction method for air coolers and their auxiliary pipe racks includes the following steps: Step 1: Construction Preparation A plan for dividing the air cooler and its auxiliary pipe rack into hoisting modules was developed, which divides the air cooler and its auxiliary pipe rack into several independent hoisting modules. Each hoisting module includes several pipe bundles, several air cooler frame modules, and several auxiliary pipe rack modules. Each hoisting module is numbered according to the hoisting sequence. Calculate the weight and center of gravity of each hoisting module, verify its hoisting stability, and formulate and implement reinforcement measures for modules with insufficient stability. Step 2: Selection and fabrication of lifting gear Based on the geometric dimensions and weight of each hoisting module, lifting lugs are welded to the top of its steel column; a frame-type balancing hoist is designed and manufactured, the geometric dimensions of which are the same as the projected dimensions of the hoisting module, and the lifting lugs on which are set in the same position as the lifting lugs on the hoisting module and are set in parallel, so as to keep the connecting slings in a vertical stress state during hoisting. Step 3: Modular relocation and installation of hoisting modules; Construction of the new location air cooler platform and column base plates: at the top layer of the steel structure where the air cooler is installed, the air cooler platform is laid and the column base plates of the air cooler steel frame are constructed. The electrical and instrumentation cable connections for the air cooler and its associated pipe racks were removed, and the cable trays were modified. According to the division plan for the hoisting modules of the air cooler and its auxiliary pipe gallery, temporary reinforcement and support construction is carried out for each hoisting module; The connection between the pipe rack and the flange of the pipe bundle is disconnected, and the pipe bundle is hoisted and dismantled. The air cooler frame is divided into several air cooler frame modules, and the auxiliary pipe gallery is divided into auxiliary pipe gallery modules. The air cooler frame modules and auxiliary pipe gallery modules are welded with lifting lugs. Each air cooler frame module and auxiliary pipe gallery module is hoisted and moved according to the hoisting sequence. After being in place, they are assembled and welded in modules, and then the temporary reinforcement supports are removed. Dismantle the air cooler frame module and auxiliary pipe gallery module hoisting lugs, hoist and reinstall the pipe bundle, and restore and install pressure test blind flanges on the pipeline; Re-laying and rewiring of electrical and instrumentation cables for the air cooler and its associated pipe rack; Step 4: System acceptance.

[0007] In a preferred embodiment, in step one, when dividing the hoisting modules, the orthographic projection shape of each air cooler frame module is a square, and the orthographic projection shape of the auxiliary pipe gallery module is a rectangle.

[0008] In a preferred embodiment, in step two, the lifting lugs on the top of the steel column of the hoisting module and the lifting lugs on the frame-type balance hoist are both plate-type lifting lugs.

[0009] In a preferred embodiment, in step two, the frame of the balancing hoist uses H-beams as the main beam and angle steel as the horizontal support. The main beam and the horizontal support are detachably connected by connecting plates and high-strength bolts.

[0010] As a preferred embodiment, in step three, the portion of the auxiliary pipe gallery module lacking a supporting column on one side is reinforced with H-beams of the same specifications as the original columns.

[0011] As a preferred implementation, in step three, the temporary reinforcing steel is lapped and welded to the inner side of the original column cut-off position, and the end is welded to the auxiliary pipe gallery crossbeam. This ensures the stability of the structure of each hoisting module after the air cooler frame is divided into several hoisting modules, and at the same time ensures that each auxiliary pipe gallery hoisting module can be hoisted into place independently and stably.

[0012] As a preferred embodiment, in step three, all bolts and gaskets connecting the flanges of the air cooler tube bundle are removed, and the tube bundle is lifted and dismantled piece by piece by a crane and stacked on site; the removed bolts are cleaned with kerosene and then coated with grease for maintenance.

[0013] As a preferred embodiment, in step three, plate-type lifting lugs are welded to the top of each air cooler frame module and auxiliary pipe gallery module. The air cooler frame and auxiliary pipe gallery are cut and separated into several air cooler frame modules and several auxiliary pipe gallery modules, and each module is cut off at the column base and separated from the original installation platform.

[0014] As a preferred implementation, in step three, after each hoisting module is in place, the tube bundle is hoisted and reinstalled. New gaskets and pressure-testing blind flanges are added between the air cooler auxiliary tube rack and the matching flanges of the tube bundle. After the bolts are cleaned, maintained, and inspected, they are tightened with torque. The golden joints of the auxiliary tube rack pipes are welded and non-destructive testing is performed.

[0015] In a preferred embodiment, step four includes the acceptance of the air cooler frame and pipe gallery structure installation, pipeline pressure test, electrical instrument wiring and debugging, and air cooler fan commissioning. After all the acceptances are completed, the air cooler and auxiliary pipe gallery system are accepted and can be put into production.

[0016] This invention employs a modular relocation construction method for air coolers and auxiliary pipe racks. The air cooler and auxiliary pipe rack are divided into several hoisting modules, and ground cranes are used in conjunction with these modules for modular relocation. Modular dismantling and assembly replaces the traditional method of dismantling and reassembling scattered components, significantly reducing the number of hoisting operations, the amount of construction machinery used, and high-altitude hoisting work, thus greatly shortening the construction period for the relocation of the air cooler and auxiliary pipe racks. Simultaneously, the use of a frame-type balancing hoist ensures the overall stability of the modular hoisting system for the air cooler and auxiliary pipe racks, guaranteeing the safety and quality of the relocation construction. This modular relocation construction method for air coolers and auxiliary pipe racks is also suitable for the modular installation of air cooler structures in new petrochemical projects.

[0017] Furthermore, the frame-type balancing hoist provided by this invention can be reused, is flexible in use, and can be repeatedly used for modular installation and relocation of air coolers and auxiliary pipe racks. Attached Figure Description

[0018] The accompanying drawings, which are provided to further illustrate the invention and form part of this application, illustrate exemplary embodiments of the invention and are used to explain the invention, but do not constitute an undue limitation of the invention.

[0019] Figure 1 This is an overall process flow diagram of modular shifting provided in an embodiment of the present invention; Figure 2 A top view (a) and an elevation view (b) of the frame-type balancing hoist structure provided in an embodiment of the present invention. Figure 3 This is a detailed drawing of the main beam connection node of the frame-type balancing spreader provided in an embodiment of the present invention. Figure 3 a, b, and c are respectively Figure 2 Detailed diagram of the connecting nodes at the middle corner node A, middle node B, and center node C; Figure 4 This is a schematic diagram of the hoisting of the air cooler frame module provided in an embodiment of the present invention; Figure 5 This is an elevation view of the air cooler frame module hoisting provided in an embodiment of the present invention; Figure 6 These are schematic diagrams illustrating the reinforcement of two auxiliary utility tunnel module structures provided in embodiments of the present invention. Figure 7 This is an elevation view of the hoisting of the auxiliary pipe gallery module provided in an embodiment of the present invention.

[0020] In the diagram, 1-frame-type balancing hoist, 2-air cooler frame module, 3-air cooler positioning platform and column base, 4-lifting lug, 5-auxiliary pipe gallery module, 6-temporary reinforcement support, 7-original pipe gallery steel column, 8-golden joint, 9-crane; 101-main beam, 102-horizontal brace, 103-lifting sling, 104-reinforcing rib plate, 105-high-strength bolt, 106-connecting plate. Detailed Implementation

[0021] To enable those skilled in the art to better understand the present invention, the present invention will be further described clearly and completely below with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other.

[0022] The present invention provides a modular relocation construction method for air coolers and auxiliary pipe racks in a typical embodiment. By dividing the air cooler and auxiliary pipe racks into several hoisting modules, a ground crane 9 is used to assist in the modular relocation construction of the air cooler and auxiliary pipe racks. The modular dismantling, hoisting, and assembly method replaces the traditional construction method of dismantling and reassembling scattered parts, which greatly reduces the number of hoisting parts, the number of hoisting operations, the number of construction machinery used, and the high-altitude hoisting operations, and greatly shortens the construction period of the relocation of the air cooler and auxiliary pipe racks, thus achieving the purpose of the relocation construction of the air cooler and auxiliary pipe racks.

[0023] This embodiment takes a petrochemical technical renovation project as an example. Five air coolers (equipment tag numbers A / B / C / D / E) and their auxiliary pipe racks need to be moved as a whole. The air coolers and auxiliary pipe racks are installed on a steel structure platform at elevation EL+20m. Each air cooler includes two tube bundles, two fans and an air cooling frame. The auxiliary pipe rack is a double-row, four-story steel structure pipe rack. The auxiliary pipe rack and the air cooler frame share a column on one side.

[0024] Modular relocation construction method for air coolers and auxiliary pipe racks, the overall construction process is as follows: Figure 1 As shown, the construction steps include construction preparation, selection and fabrication of lifting equipment, modular relocation of lifting modules, and system acceptance.

[0025] S1. Construction preparation, such as Figure 1 As shown, it includes the following steps S101-S102.

[0026] S101. Develop a module division scheme.

[0027] The air cooler and its auxiliary pipe rack are divided into several hoisting modules, including several pipe bundles, several air cooler frame modules, and several auxiliary pipe rack modules. The hoisting modules are numbered according to the hoisting sequence.

[0028] In this embodiment, the air cooler and auxiliary pipe rack are divided into several hoisting modules, including 5 pipe bundles, 2 air cooler frame modules 2 (each module contains 2 air cooler frames), and 2 auxiliary pipe rack modules 5. When dividing the hoisting modules, to ensure the stability and safety of the hoisting system for each module during hoisting, the orthographic projection of each air cooler frame module 2 should be a square, and the orthographic projection of each auxiliary pipe rack module 5 should be a rectangle, ensuring the stability of the hoisting system. The hoisting modules are numbered according to the hoisting sequence.

[0029] S102. Calculate the hoisting system and prepare reinforcement materials.

[0030] The weight and center of gravity of each hoisting module are calculated based on the equipment components, steel structure components, and piping components within each hoisting module, and the hoisting stability of the modules is verified. For unstable hoisting modules, reinforcement measures are developed, and temporary reinforcement support material 6 is prepared. Because the auxiliary pipe gallery module and the air-cooled frame module are physically separated, the auxiliary pipe gallery module lacks a supporting column on one side of the connection point. Therefore, the temporary reinforcement support 6 used for reinforcing the auxiliary pipe gallery hoisting module is made of the same type of steel as the original structure.

[0031] S2. Selection and fabrication of lifting devices, such as Figure 1 As shown, it includes the following steps S201-S202.

[0032] S201, Design and manufacture of hanging lugs.

[0033] Based on the geometric dimensions and lifting weight of each lifting module, a certain number of lifting lugs 4 are selected and manufactured. In this embodiment, the lifting lugs are plate-type lifting lugs of the 7.5t class, made of δ=24mm Q235B steel plate. After the pipe bundle is removed, they are fully welded and evenly distributed on the top of the steel columns of each lifting module.

[0034] S202, Lifting Gear Design and Fabrication.

[0035] Design a frame-type balancing hoist 1. The geometric dimensions of the frame-type balancing hoist 1 are the same as the projected dimensions of the air-cooled frame module 2. The lifting lugs of the frame-type balancing hoist 1 are in the same position as the lifting lugs on the air-cooled frame module 2 and are set in parallel. By using the frame-type balancing hoist 1, it is ensured that the included angle of the lifting slings 103 between each air-cooled frame module 2 and the frame-type balancing hoist 1 is 90°, ensuring that the air-cooled frame module 2 is only subjected to force in the vertical direction.

[0036] like Figure 2 , Figure 3As shown in the figure, the main frame of the frame-type balance sling 1 used for hoisting the air-cooled heat exchanger framework module 2 is in a "field" shape. The main beam 101 is made of HW300×300×8×12 Q345 H-shaped steel, and the horizontal brace 102 is made of angle steel L80×80×8 Q235B. The main beams of the framework and between the main beam 101 and the horizontal brace 102 are all connected by connecting plates 106 and high-strength bolts 105, which is convenient for disassembly and assembly. The connecting plate 106 is made of δ=10mm Q235B steel plate, and the high-strength bolt 105 is M18*50 8.8 grade.

[0037] The lifting lugs 4 on the frame-type balance sling 1 and the lifting lugs 4 of the air-cooled framework module are of the same specification type, both of the plate-type lifting lug type, made of δ=24mm Q235B steel plate, and the positions are the same as the relative positions of the lifting lugs 4 on the air-cooled framework module 2. The lifting lugs 4 on the frame-type balance sling 1 are reinforced by reinforcing rib plates 104, and the reinforcing rib plates 104 are made of δ=10mm Q235B steel plate. The sling 103 between the frame-type balance sling 1 and the air-cooled framework module 2 is selected as a fiber core wire rope with a diameter of Ф26-6×37.

[0038] S3. Modular displacement construction of the hoisting module. As Figure 1 shown, it includes the following steps S301-S308.

[0039] S301. Construction of the air-cooled heat exchanger platform and column base plates. At the top layer position of the steel structure where the air-cooled heat exchanger is installed and positioned, lay the air-cooled heat exchanger platform and construct the column base plates of the air-cooled heat exchanger steel framework, and control the levelness of the column base plates to facilitate the installation of each hoisting module.

[0040] S302. Disconnect the electrical and instrument cables and modify the cable tray. Disconnect the cable connections of the air-cooled heat exchanger frame lighting cables, the electrical power and control cables connected to the air-cooled heat exchanger motors, and the cables connected to the pipeline instrument equipment in the air-cooled heat exchanger pipe gallery, cut and change the direction of the cable tray wire boxes, and re-lay the cable tray and cables to the new installation position.

[0041] S303. Construction of the temporary reinforcement support 5 for the accessory pipe gallery module 5. Figure 6 It is a schematic diagram of the structural reinforcement of the accessory pipe gallery module. For the part of the accessory pipe gallery module 5 lacking a support column on one side, H-shaped steel of the same specification as the original column is used as the temporary reinforcement support 6. The temporary reinforcement support 6 is lap-welded to the inner side of the cut-off position of the original pipe gallery steel column 7 to ensure the structural stability of each hoisting module after the air-cooled heat exchanger framework is disassembled into several hoisting modules, and at the same time ensure that each accessory pipe gallery module 5 can be placed independently and stably after being hoisted and positioned.

[0042] S304. Tube bundle hoisting and dismantling: Remove all bolts and gaskets connecting the flanges of the air cooler tube bundle, separate the air cooler auxiliary tube rack from the tube bundle, clean the removed bolts and then apply grease for maintenance; use crane 9 to hoist and dismantle the tube bundle piece by piece and stack them on site.

[0043] S305, each hoisting module is disassembled, and the four lifting lugs are welded.

[0044] The five air cooler frames were physically disassembled at the central location (air cooler tag C) into two air cooler frame modules 2: one module for air cooler tags A and B, and another module for air cooler tags D and E. The auxiliary pipe rack was also disassembled into two auxiliary pipe rack modules 5. Pipes between the auxiliary pipe rack modules were cut, leaving pre-cut joints 8, which will be re-welded after relocation. Plate-type lifting lugs 4 were welded to the top of each air cooler frame module 2 and auxiliary pipe rack module 5. Finally, each module was cut off at the column base and separated from the original installation platform. Figure 4 This is a schematic diagram of the hoisting of the air cooler frame module.

[0045] S306. Module hoisting and relocation: Use crane 9 to hoist each module one by one in the hoisting sequence and relocate them to the new location on the air-cooled positioning platform and column base 3. Figure 5 The image shown is an elevation view of the air cooler frame module being hoisted. Figure 7 This is an elevation view of the hoisting of the auxiliary utility tunnel module.

[0046] Assemble each hoisting module, weld the steel columns of each hoisting module to the column base plates of the air cooler platform at the new location, and after the welding between modules is completed, remove the temporary reinforcement support 5.

[0047] S307. Tube bundle reinstallation and pipe connection. After each hoisting module is in place, the tube bundle is hoisted and reinstalled. New gaskets and pressure test blind flanges are installed between the air cooler auxiliary tube rack and the matching flanges of the tube bundle. Bolts are cleaned, cured, and inspected before torque tightening. The golden joints of the auxiliary tube rack pipes are welded at 8 and non-destructive testing is performed.

[0048] S308. Electrical and Instrumentation Wiring. Restore the wiring of the lighting cables for the air cooler frame, the electrical power and control cables connected to the air cooler motor, and the cable connections for the instrumentation equipment in the air cooler pipe gallery. The modular relocation of the air cooler and its auxiliary pipe gallery is now complete.

[0049] S4. System Acceptance. For example... Figure 1 As shown, the process includes the following steps S401-S405.

[0050] S401. Installation and acceptance of air cooler frame and pipe gallery structure. The installation quality of air cooler frame and pipe gallery structure shall be re-measured. Installation quality standards: the difference between the plane diagonals of the frame shall not exceed 5mm, the deviation between the center line of the column base and the positioning axis shall not exceed 5mm, and the verticality deviation of the column shall not exceed 5mm.

[0051] S402. Equipment installation acceptance: Re-measure and inspect the installation of the pipe bundle and fan. The longitudinal and transverse center position deviation of the pipe bundle shall be ≤5mm. The installation angle of the fan blades shall be re-measured according to the assembly standard data in the technical documents of the fan manufacturer. The blade installation angle deviation shall not exceed ±0.5°. The center line position deviation of the fan motor base shall not exceed 2mm. The parallelism tolerance of the end faces of the two pulleys shall not exceed 1mm. The parallelism tolerance of the two axes shall be 1mm / m.

[0052] S403. Pipeline pressure test acceptance: The pipeline pressure test adopts a hydraulic test, using clean water as the test medium. The pipeline system is filled with water using a test pump, and the pressure is increased slowly in stages. After reaching the test pressure, the pressure is stopped for 10 minutes, and no abnormalities are observed. Then, the pressure is reduced to the design pressure and stopped for 30 minutes. If there is no pressure drop, no leakage, and no deformation, the pipeline system is verified as a qualified system. After the test is passed, the water in the pipeline system is drained, the test blind flange is removed, the formal gasket is restored, and the bolts are tightened.

[0053] S404 Electrical instrument wiring, commissioning and acceptance: Check and confirm that the motor rotation direction and power supply phase sequence correspond correctly, and debug the protection, control, measurement and signal circuits of the motor, which should be working normally.

[0054] S405. Air Cooler Fan Trial Run and Acceptance. First, conduct a motor trial run. Disconnect the motor from the air cooler fan body belt, briefly start the motor to confirm the correct rotation direction, and then start the motor and run it continuously for 2 hours. During this time, check the motor vibration, temperature, and current every 30 minutes for any abnormalities and record the results. After the motor trial run is successful, reinstall the belt and conduct a fan trial run. Turn on the air cooler fan switch, start the fan, and run it continuously for 2 hours. During this time, check the fan vibration and sway, check the belt drive, and check the motor sound and temperature for normality.

[0055] Finally, once the above acceptance tests are passed, the air cooler and its auxiliary pipe gallery system are accepted and can be put into production.

[0056] The scope of protection claimed by this invention is not limited to the specific embodiments described above. For those skilled in the art, this invention can have various modifications and alterations. Any modifications, improvements, and equivalent substitutions made within the concept and principles of this invention should be included within the scope of protection of this invention.

Claims

1. A method for the modular displacement construction of an air cooler and associated pipe rack, characterized in that, The method comprises the following steps: Step one, construction preparation Divide the air cooler and the auxiliary pipe gallery into several independent lifting modules, and the lifting modules comprise several pipe bundles, several air cooler framework modules and several auxiliary pipe gallery modules; number the lifting modules according to the lifting sequence; Calculate the weight and the center of gravity of each lifting module, calculate the lifting stability, and make and implement reinforcement measures for the modules with insufficient stability; Step two, selection and production of lifting devices According to the geometric size and weight of each lifting module, weld lifting lugs on the top of the steel columns; design and produce a frame type balance lifting device, the geometric size of the frame type balance lifting device is the same as the projection size of the lifting module, the lifting lugs on the frame type balance lifting device are arranged at the same position as the lifting lugs on the lifting module and are arranged in parallel, and the frame type balance lifting device is used to keep the connecting sling in a vertical force state during lifting; Step three, modular displacement construction of the lifting modules Perform air cooler platform and column foot plate construction at the position of the top layer of the steel structure where the air cooler is installed, perform air cooler platform laying and air cooler steel framework column foot plate construction; Remove the electrical and instrument cable wiring of the connection of the air cooler and the auxiliary pipe gallery pipe, and perform bridge modification; According to the air cooler and the auxiliary pipe gallery lifting module division scheme, perform temporary reinforcement support construction of each lifting module; Disconnect the pipe bundle auxiliary pipe gallery pipe and the pipe bundle pipe flange, and lift and remove the pipe bundle; Split the air cooler framework into several air cooler framework modules, split the auxiliary pipe gallery into auxiliary pipe gallery modules, weld lifting lugs on the air cooler framework modules and the auxiliary pipe gallery modules; According to the lifting sequence, lift and displace each air cooler framework module and auxiliary pipe gallery module, assemble and weld the modules after being placed in position, and then remove the temporary reinforcement support; Remove the lifting lugs of the air cooler framework modules and the auxiliary pipe gallery modules, lift and reinstall the pipe bundle, and restore the pipe to add a pressure test blind plate; Re-lay and wire the electrical and instrument cables of the air cooler and the auxiliary pipe gallery; In step one, when the lifting modules are divided, the orthographic projection shape of each air cooler framework module is a square, and the orthographic projection shape of each auxiliary pipe gallery module is a rectangle.

2. The air cooler and appurtenant pipe rack modularized shifting construction method according to claim 1, characterized in that: In step two, the lifting lugs on the top of the steel columns of the lifting modules and the lifting lugs on the frame type balance lifting device are both plate type lifting lugs.

3. The air cooler and appurtenant pipe gallery modular displacement construction method according to claim 1 or 2, characterized in that: In step two, the frame of the frame type balance lifting device uses H-shaped steel as the main beam and uses angle steel as the horizontal support, and the main beam and the horizontal support are detachably connected through connecting plates and high-strength bolts.

4. The air cooler and appurtenant pipe rack modularized shifting construction method according to claim 3, characterized in that: In step three, the part of the auxiliary pipe gallery module where the support column is missing is replaced with an H-shaped steel of the same specification as the original support column as a temporary reinforcement steel.

5. The air cooler and appurtenant pipe gallery modular displacement construction method according to claim 1 or 4, characterized in that: In step three, the temporary reinforcement steel is lap welded inside the cut-off position of the original support column, and the end is welded with the auxiliary pipe gallery cross beam, so as to ensure the stability of the structure of each lifting module after the air cooler framework is split into several lifting modules, and to ensure that each auxiliary pipe gallery lifting module can be placed independently and stably after being lifted and placed.

6. The air cooler and appurtenant pipe rack modularized shifting construction method according to claim 5, characterized in that: In step three, remove the bolts and gaskets connecting all the pipe flanges of the air cooler pipe bundle, use a crane to lift and remove the pipe bundle piece by piece, and stack them on site; after the removed bolts are cleaned with kerosene and pass the inspection, apply grease for maintenance.

7. The air cooler and appurtenant pipe gallery modular displacement construction method according to claim 1 or 6, characterized in that: ​ 8. The air cooler and appurtenant pipe rack modular displacement construction method according to claim 7, characterized in that: In step three, the column top welding plate hanger of each air cooler framework module and auxiliary pipe gallery module is welded, the air cooler framework and auxiliary pipe gallery entity is cut and split into several air cooler framework modules and several auxiliary pipe gallery modules, and each module is cut at the column foot part and separated from the original installation platform.

9. The air cooler and appurtenant pipe rack modular displacement construction method according to claim 8, characterized in that: In step three, after each hoisting module is positioned, the tube bundle is hoisted back, new gaskets and pressure test blind plates are installed between the air cooler auxiliary pipe gallery and the flanges of the tube bundle, the bolts are cleaned and maintained, and torque tightening is performed after acceptance; the gold mouth of the auxiliary pipe gallery pipeline is welded and nondestructive testing is performed.

10. The air cooler and appurtenant pipe gallery modular displacement construction method according to claim 1 or 9, characterized in that: In step four, the system acceptance includes air cooler framework and pipe gallery structure installation acceptance, pipeline pressure test acceptance, electrical instrument wiring debugging acceptance, and air cooler fan commissioning acceptance. After all the acceptances are completed, the air cooler and auxiliary pipe gallery system acceptance is completed, and the system can be put into production and use.

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