INFLUENCE OF ADDING OXYGEN INTO FEED-WATER TREATMENT UPON HIGH-TEMPERATURE OXIDE SKIN FORMED IN THE SUPERHEATOR

ZHANG Guangwen1; SUN Benda2; ZHANG Jinsheng1; GU Qinghua3; CAI Jingguang1 1.Shenhua Guohua(Beijing) Electric Power Research Institute

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INFLUENCE OF ADDING OXYGEN INTO FEED-WATER TREATMENT UPON HIGH-TEMPERATURE OXIDE SKIN FORMED IN THE SUPERHEATOR

Thermal Power Generation Vol. 41, Issue 1, Pages: 31-33(2012)

更新时间：2025-09-28

- INFLUENCE OF ADDING OXYGEN INTO FEED-WATER TREATMENT UPON HIGH-TEMPERATURE OXIDE SKIN FORMED IN THE SUPERHEATOR
- 作者机构：
  
  1. 神华国华(北京)电力研究院
  2. 西安热工研究院有限公司
  3. 国华太仓发电有限责任公司
- 作者简介：
- 基金信息：
- DOI：
  CLC： TM621.8
- Published：2012
- 稿件说明：
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ZHANG Guangwen1, SUN Benda2, ZHANG Jinsheng1, et al. INFLUENCE OF ADDING OXYGEN INTO FEED-WATER TREATMENT UPON HIGH-TEMPERATURE OXIDE SKIN FORMED IN THE SUPERHEATOR[J]. Thermal Power Generation, 2012, 41(1): 31-33.
DOI：

ZHANG Guangwen1, SUN Benda2, ZHANG Jinsheng1, et al. INFLUENCE OF ADDING OXYGEN INTO FEED-WATER TREATMENT UPON HIGH-TEMPERATURE OXIDE SKIN FORMED IN THE SUPERHEATOR[J]. Thermal Power Generation, 2012, 41(1): 31-33. DOI：

摘要

以某超临界660MW机组为例进行了给水加氧处理试验

测量比对加氧前后过热器氧化皮的生长速率

并对氧化皮结构、成分的变化进行分析。结果表明

给水加氧处理并未加快T23和T91材质过热器氧化皮的生成速度及促进其脱落

但对TP347H材质的过热器

加氧处理具有促进其氧化皮剥离的作用。因此

采用给水加氧处理的关键是控制机组起、停时的温度以抑制加氧后不锈钢氧化皮的大量脱落。

Abstract

A test of adding oxygen into feed-water treatment has been carried out on one supercritical 600 MW unti.Through measuring the growth rate of oxide skin formed in the superheater

as well as analysing the micro-structure and the variation of composition in the said oxide skin

it shows that the adding oxygen into feed-water treatment hadn't quickened the growth rate of oxide skin formed in the superheaters made from T23 and T91 steel materials

and hadn't promoted the fall-off of said oxide skin

however

in superheater made from TP347H steel

the adding oxygen into feed-water treatment boasts effect to promote the peel-off of oxide skin

where as the key of control is controlling the temperature during start-up and shutdown of unit

therefore

in the process of using the above-mentioned treatment to inhibit corrosion of the superheater

the most crucial problem is to control the fall-off of oxide skin in vast amount from stainless steel tubes after using the adding oxygen treatment.

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