Discussion on startup technology without alternate steam in a 300 MW thermal power unit

LI Ruxiang1; LIU Dingping2 1.Shaoguan Power Plant

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Discussion on startup technology without alternate steam in a 300 MW thermal power unit

更新时间：2025-09-28

- Discussion on startup technology without alternate steam in a 300 MW thermal power unit
- Thermal Power Generation Vol. 42, Issue 4, Pages: 77-79(2013)
- 作者机构：
  
  1. 韶关发电厂
  2. 华南理工大学电力学院
- 作者简介：
- 基金信息：
- DOI：
  CLC： TM621
- Published：2013
- 稿件说明：
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LI Ruxiang1, LIU Dingping2 1.Shaoguan Power Plant. Discussion on startup technology without alternate steam in a 300 MW thermal power unit[J]. Thermal power generation, 2013, 42(4): 77-79.
DOI：

LI Ruxiang1, LIU Dingping2 1.Shaoguan Power Plant. Discussion on startup technology without alternate steam in a 300 MW thermal power unit[J]. Thermal power generation, 2013, 42(4): 77-79. DOI：

摘要

对某300MW机组在无备用蒸汽下起动的可行性进行了分析

提出了机组无备用蒸汽的起动方案及关键技术。即利用锅炉直接点火升温升压

通过开启高压旁路向辅助蒸汽联箱供汽

以满足除氧器和汽轮机轴封等的用汽需求;对空气预热器吹灰进行临时改造

先使用压缩空气吹灰

待辅助蒸汽联箱压力达到0.8MPa并趋于稳定后改由蒸汽吹灰。该方案实施后

实现了机组的无备用蒸汽起动

可节约改造费用约100万元。

Abstract

The feasibility of startup with no standby steam for a 300 MW unit was analyzed

and the start scheme and key technology of the unit without alternate steam was proposed.The fuel was ignited directly to increase the temperature and pressure in furnace

then by opening the high pressure bypass the steam was supplied to the auxiliary steam header

which met the steam demands of deaerator and turbine shaft seal.Temporarily modify the air preheater soot blowing

using the compressed air to blow the soot untill the pressure in auxiliary steam header was at 0.8 MPa and tended to be stable.After the implementation of this program

the unit tests and the whole startup process were successfully done and about one million yuan of retrofitting cost was saved.

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