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Anti-rust protection method for shutdown of waste heat boiler unit

A waste heat boiler and unit technology, applied in the direction of metal material coating technology, etc., can solve the problems of failure to meet the needs of shutdown and maintenance, failure to meet maintenance requirements, and failure to dry, etc., to increase environmental protection and social benefits, win-win social benefits, reduce The effect of small sewage discharge

Active Publication Date: 2018-02-09
北京京桥热电有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Limited by the design of the furnace, the boiler is prone to water accumulation and cannot be dried after the boiler is discharged under pressure, which cannot meet the maintenance requirements of the conventional dry maintenance method
However, the general wet maintenance method cannot meet the needs of furnace shutdown and maintenance.

Method used

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  • Anti-rust protection method for shutdown of waste heat boiler unit
  • Anti-rust protection method for shutdown of waste heat boiler unit
  • Anti-rust protection method for shutdown of waste heat boiler unit

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0052] This embodiment provides a method for protecting a waste heat boiler unit from rust and corrosion during shutdown, which includes the following steps:

[0053] (1) Start the boiler 3 hours before the shutdown of the waste heat boiler to ignite and increase the temperature and pressure, and replace the steam source of the auxiliary steam header from the reheated cold section steam to the startup boiler;

[0054] (2) Check the steam source of the reheating and cold section steam supply turbine shaft seal, open the cold resupply shaft seal steam pipeline to drain, preheat the temperature of the pipeline to a degree of superheat greater than 50°C, and use it as a backup shaft seal for steam supply, ready to be put into operation at any time;

[0055] (3) Carry out a comprehensive inspection of the gas turbine, waste heat boiler, steam turbine and generator equipment system before shutting down, and record the defects;

[0056] (4) Calibrate the water level gauges of each dr...

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PUM

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Abstract

The invention provides an anti-corrosion protection method for shutting down a waste heat boiler unit. The method is to realize the anti-corrosion protection of the waste heat boiler unit by adding octadecylamine to the waste heat boiler unit during the shutdown maintenance process. In the method provided by the present invention, during the shutdown process of the waste heat boiler unit, when the pressure and temperature of the boiler drop to a suitable condition, film-forming amine is added to the thermal system to form a layer of monomolecular or multi-molecular phobic acid on the inner surface of the thermal equipment. Water protection film, so as to achieve the purpose of preventing metal corrosion.

Description

technical field [0001] The invention relates to an anti-corrosion protection method for a waste heat boiler unit, and belongs to the technical field of waste heat boiler maintenance. Background technique [0002] Judging from the survey of boiler maintenance nationwide, although there are special guidelines for boiler anti-corrosion methods, for vertical waste heat boilers, the design is novel and there is little mature experience. The solution is not mature. Limited by the design of the furnace, the boiler tends to accumulate water after it is released under pressure and cannot be dried, which cannot meet the maintenance requirements of the conventional dry maintenance method. However, the general wet maintenance method cannot meet the needs of shutdown and maintenance. [0003] Therefore, the maintenance before the overhaul of vertical furnace becomes the new problem that this field faces. Contents of the invention [0004] In order to solve the above technical proble...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C22/02C23F11/14
Inventor 安振源章嵛耑李军李强刘冰田川康文超杨继伦刘娟李晓彪侯宝张尧闫文辉乔中格马万军王六虎梅东升关天罡
Owner 北京京桥热电有限责任公司
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