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CN-122015076-A - Gas boiler superheater hoisting method

CN122015076ACN 122015076 ACN122015076 ACN 122015076ACN-122015076-A

Abstract

The invention discloses a gas boiler superheater hoisting method, and relates to the field of hoisting of electric power construction project equipment. The method aims at the problems of more overhead operations, low efficiency and high safety risk in the traditional hoisting method, and the superheater system is divided into three parts, namely a front part (a ceiling superheater inlet header, an inlet pipe row and a screen superheater) and a rear part (a ceiling superheater outlet pipe row and an outlet header), which are respectively integrally hoisted after being assembled on the ground. The front part is assembled by utilizing the assembling platform to change the operation of the screen type superheater from high idling to the ground, the screen type superheater is integrally lifted with the screen type superheater during lifting, the rear part is integrally lifted with the furnace rear top plate, and the low-temperature superheater tube bank is stored in the tail flue in advance, so that the efficiency is saved. The invention converts a large amount of high-altitude pairing and wearing operation into ground operation, reduces high-altitude cross operation, obviously improves hoisting efficiency, reduces construction safety risk and saves input cost.

Inventors

  • WANG DONGHUI
  • LIU YONGLIANG
  • LIU MINGLIANG
  • Lv Huiwen
  • Meng Wansheng
  • ZHANG ZHIGUO

Assignees

  • 中化二建集团有限公司

Dates

Publication Date
20260512
Application Date
20260326

Claims (8)

  1. 1. The gas boiler superheater hoisting method is characterized by comprising the following steps that a superheater system is hung below a furnace rear girder through a hanging device: step 1, dividing a superheater module; dividing the superheater system into a front part (8), a middle part and a rear part (10) according to the structural characteristics; Step 2, assembling and hoisting the front part (8) and the rear girder; the screen type superheater (2) is assembled with a header and a tube bank of a ceiling superheater inlet (101) on a ground assembling platform (5) to form a front part (8) assembly, the front part (8) assembly is lifted by using a temporary hanging device (6) and is temporarily fixed, and after the lifting of a big plate girder behind a furnace is completed, the front part (8) is transferred to a formal hanging device; step 3, hoisting the high-temperature superheater (3) and pre-storing the low-temperature superheater (4); Hoisting an inlet and outlet header of the high-temperature superheater (3), and pre-storing all tube banks of the low-temperature superheater (4) to an outlet flue area at the rear part of the boiler; Step 4, assembling and hoisting the rear part (10); forming a rear part (10) assembly on a pipe row and a header of a ceiling superheater outlet (102) on the ground, and integrally hoisting the rear part and a rear top plate (11) to a design position; Step 5, hoisting the middle scattered pipe and the low-temperature superheater (4); After the front part and the rear part are in place, installing a scattered pipe in the middle of the ceiling superheater (1), hoisting an inlet and outlet header and a pre-stored pipe row of the low-temperature superheater (4), and finishing assembly and welding; step 6, fine adjustment and sealing of a header; Performing elevation fine adjustment on each stage of header, and performing primary seal welding; Step 7, finishing the installation of the superheater; the temporary measures are checked and removed comprehensively.
  2. 2. The method according to claim 1, wherein in step 1, the front section (8) comprises a tube row and header of a ceiling superheater inlet (101) and a screen superheater (2) to be installed through, the middle section comprises a tube row and header of a high temperature superheater (3) and a low temperature superheater (4) and the rear section (10) comprises a tube row and header of a ceiling superheater outlet (102).
  3. 3. The method according to claim 2, wherein in the step 2, a pairing platform (5) is set up on the ground, pairing work of all parts of the front part (8) is completed, and a front part (8) assembly is formed, the pairing platform (5) is of a double-layer ladder-shaped steel structure, and a clearance cavity for accommodating the screen type superheater (2) is excavated under the pairing platform.
  4. 4. A method according to claim 3, characterized in that in step 2, the front part (8) assembly is lifted by a temporary suspension device (6), a plurality of lifting lugs (601) for suspending the screen type superheater (2) are arranged below the temporary suspension device (6), and lifting lugs (602) for connecting a crane (7) are arranged above the temporary suspension device.
  5. 5. The method according to claim 1, wherein in the step 5, the installation sequence of the low-temperature superheater (4) is that the inlet header and the outlet header are firstly hoisted to be in place, and then the tube banks pre-stored in the outlet flue are sequentially installed and assembled with the header for welding.
  6. 6. The method according to claim 1, wherein in the step 6, the header trimming is performed by adjusting the boom extension length, and precisely adjusting the header elevation of each stage to the design installation elevation using a laser level or a level gauge.
  7. 7. The method according to claim 1, wherein in the step 6, the sequence of the primary sealing welding is symmetrically performed from the middle part of the ceiling superheater (1) to two sides, and then the sealing welding of the junction of the peripheral water-cooled walls and the furnace wall is completed.
  8. 8. The method according to claim 1, wherein in step 7, the temporary means comprise temporary lifting lugs, temporary support and auxiliary platforms.

Description

Gas boiler superheater hoisting method Technical Field The invention relates to the field of hoisting of electric power construction project equipment, in particular to a hoisting method of a gas boiler superheater. Background The gas boiler superheater system comprises a ceiling superheater, a screen superheater, a low temperature superheater and a high temperature superheater. The screen type superheater, the high-temperature superheater and the low-temperature superheater sequentially penetrate through the ceiling superheater from front to back and are hung in the hearth, and the whole superheater system is hung below the rear large plate girder of the furnace through the hanging device. Because of the special structure, the inlet pipe row of the ceiling superheater is divided into a plurality of modules due to the passing of the screen superheater, the middle pipe row is dispersed into a plurality of scattered pipes due to the passing of the high-temperature and low-temperature superheater pipe rows, the welding is needed to be assembled on site one by one, and only the outlet pipe row is of an integral structure. The traditional hoisting method comprises the steps of hoisting a large plate girder behind a furnace and a hanging device, hoisting an inlet header of a ceiling superheater, welding an inlet pipe row module with the inlet header one by one, installing a screen superheater after one module is welded until the whole inlet pipe row is welded, hoisting a high-temperature superheater pipe row and a low-temperature superheater one by one, welding a scattered pipe one by one, welding an outlet pipe row of the ceiling superheater with the scattered pipe group, and hoisting and welding the outlet header of the ceiling superheater. The hoisting method is low in hoisting efficiency, high in safety risk of overhead cross operation and high in construction cost. Disclosure of Invention The invention aims to solve the technical problems of low hoisting efficiency, high safety risk of overhead cross operation and high construction cost in the traditional hoisting method by providing a gas boiler superheater hoisting method. In order to solve the technical problems, the invention adopts the technical scheme that the gas boiler superheater lifting method comprises the following steps that a superheater system is hung below a rear plate girder through a hanging device: step 1, dividing a superheater module; dividing the superheater system into a front part, a middle part and a rear part according to the structural characteristics; Step 2, assembling and hoisting the front part and the rear girder; Completing the assembly of a header and a tube bank of the inlet of the screen type superheater and the ceiling superheater on a ground assembly platform to form a front part assembly, hoisting and temporarily fixing the front part assembly by using a temporary hoisting device, and transferring the front part to a formal hoisting device after the hoisting of the rear girder of the furnace is completed; Step 3, hoisting the high-temperature superheater and pre-storing the low-temperature superheater; hoisting an inlet and outlet header of the high-temperature superheater, and pre-storing all tube banks of the low-temperature superheater in an outlet flue area at the rear part of the boiler; step4, rear part grouping and hoisting; forming a rear part assembly by assembling a pipe row and a header of the outlet of the ceiling superheater on the ground, and integrally hoisting the rear part assembly and a rear top plate to a design position; step 5, hoisting the middle scattered pipe and the low-temperature superheater; after the front part and the rear part are in place, installing a scattered pipe in the middle of the ceiling superheater, hoisting an inlet and outlet header of the low-temperature superheater and a pre-stored pipe row, and finishing assembly and welding; step 6, fine adjustment and sealing of a header; Performing elevation fine adjustment on each stage of header, and performing primary seal welding; Step 7, finishing the installation of the superheater; the temporary measures are checked and removed comprehensively. Further, in the step 1, the front part comprises a pipe row and a header of a ceiling superheater inlet and a screen superheater to be installed in a penetrating way, the middle part comprises a scattered pipe in the middle of the ceiling superheater, a high-temperature superheater and a low-temperature superheater, and the rear part comprises a pipe row and a header of a ceiling superheater outlet. In the step 2, a special pairing platform is erected on the ground to finish pairing of the front part, the pairing platform is of a double-layer ladder-shaped steel structure, and a clearance cavity for accommodating a screen type superheater is excavated right below the pairing platform. In step 2, a temporary hanging device is used for hanging the front part assembly, a plurality of lifting lu