Modularization vibration resisting method of gas turbine waste heat boiler

Abstract

The invention relates to a module vibration resisting method of a gas turbine waste heat boiler. The method is characterized by sequentially conducting reinforcement processing on a reheating face tube panel and an overheating face tube panel along the smoke direction of the waste heat boiler by utilizing a modularization structure of the waste heat boiler. The method includes the following steps: 1) conducting reinforcement processing on the reheating face tube panel and 2) conducting reinforcement processing on the overheating face tube panel. The step 1) includes the following steps: 1 disassembling a second vibration-resistant support, a third vibration-resistant support and a fourth vibration-resistant support and disassembling vibration-resistant supports remaining in the reheating face of the second vibration-resistant support, the third vibration-resistant support and the fourth vibration-resistant support; 2 removing fin tubes on the reheating face; 3 enabling a front row of tube panel tube bundles and a back row of tube panel tube bundles on the reheating face to form a stable whole; and 4 enabling the whole tube panel of the reheating face to form a whole. The step 2) includes the following steps: 1 removing damaged fins of the first row of tube bundles and the second row of tube bundles on the overheating face; 2 fixing a clamping plate of the second row of tube bundles on the overheating face, 3 welding tube clamps of every 12 tubes of the tube panel tube bundles of an overheater in front and back connection mode, integrally welding the tube clamps with adjacent tube clamps to reduce shaking of fin tubes. The reinforcement method is simple, practical, convenient to assemble, less in investment and widely suitable for modularization vibration resistance of various 9F gas turbine waste heat boilers.

Description

Technical field: [0001] The invention relates to a module anti-vibration method for a gas turbine waste heat boiler, which is suitable for anti-vibration of a 9F gas turbine waste heat boiler. It belongs to the technical field of power generation industry and auxiliary equipment. Background technique: [0002] At present, the 390MW gas-steam combined cycle generator set used in China has been fully completed and put into production. Among them, the model of the waste heat boiler matched with the M701F gas turbine is NG-M701F-R, which adopts a modular structure, from the front of the furnace to the rear of the furnace ( That is to say, along the flue gas flow direction), six modules are arranged in sequence, and each module is divided into three tube panels, left, middle and right. Module 1 is divided into two heating surfaces from the direction of the flue gas. The first is the reheating surface, including 3 horizontal tube panels, each tube panel has 34 tubes, and there ar...

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Problems solved by technology

In production practice, due to the flow rate of high-temperature swirling flue gas at the outlet of the gas turbine is 35-40m / s, when it reaches the first tube panel, strong tangential stress is generated, and the daily start and stop of the unit causes the tube panel to vertically and vertically The movement in the front and rear directions is large, the height of module 1 is 23 meters, and it is suspended in the furnace. The loosening and falling of the tube bundle will cause the fins of the tube bundle to be damaged, and the tubes will be worn out, which poses a great safety hazard

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