Modularization vibration resisting method of gas turbine waste heat boiler

A waste heat boiler, modular technology, applied in the direction of boiler support/positioning device, etc., can solve the problems of tube bundle fin damage, looseness, violent swing, etc., to reduce tube shaking and wear, to ensure normal production order, and to be reliable operational effect

Inactive Publication Date: 2013-07-10
SHENZHEN GUANGQIAN ELECTRIC POWER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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

Method used

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  • Modularization vibration resisting method of gas turbine waste heat boiler

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specific Embodiment 1

[0026] The present invention will be described in detail below by taking the 90MW gas-steam combined cycle generator set used by the applicant as an example. The model of the 90MW gas-steam combined cycle generator set used by the applicant is M701F gas turbine, and the model of waste heat boiler matched with this gas turbine is NG-M701F-R. The large area of ​​the vibration support is loose, and the fin tube shakes irregularly and violently, rubbing against the falling support and the anti-vibration beam, the fin is worn off, and the tube is worn through. Using the modular structure of the waste heat boiler, the flue gas of the waste heat boiler is direction, the reheated surface tube panel and the superheated surface tube panel are reinforced in turn;

[0027] 1) The reinforcement treatment of the reheated surface tube screen includes the following steps:

[0028] ①Remove the 2nd to 4th anti-vibration brackets, remove the detached part of the original anti-vibration bracket ...

specific Embodiment

[0049] Further, when removing the second to fourth anti-vibration brackets in step 1), the large area of ​​the original anti-vibration brackets of the reheated surface tube screen is loosened, the fin tubes are irregularly shaken violently, and the falling brackets and anti-vibration brackets are dislodged. The vibrating beam is rubbed, the fins are worn off, and the tube is worn through. Remove the anti-vibration brackets remaining on the reheating surface in the second to fourth anti-vibration brackets, and keep the horizontal bars and support brackets behind the reheating surface. Take off, re-weld and fix the horizontal bar and support frame; peel off the fins of about 100mm above and below the 3 standard tube bundles of the 2nd to 4th anti-vibration brackets to make them into light pipes.

[0050] Further, when the finned tubes of the reheating surface are cut off in step 1), the 6 finned tubes on both sides of each tube panel on the reheating surface and the finned tubes ...

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F22B37/24
Inventor 邹虎
Owner SHENZHEN GUANGQIAN ELECTRIC POWER
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