摘要
燃煤电厂采用气力除灰技术不但可以节省大量水资源和土地资源,减少对环境污染,而且分选后的粉煤灰还可以创造较大的经济效益。本文根据衡水电厂一期两台300MW机组干除灰系统的配置及存在问题,在综合比较分析各种气力除灰技术后,提出采用“负压收集分选同时正压输送”的技术工艺流程,并进行了系统方案的设计、设备选型、工程实施和运行调试等工作。改造后系统各主要运行技术参数符合设计指标,粉煤灰分选质量细度指标符合技术要求,分选系统粗细灰、省煤器干灰输送正常,设备运行状况良好,能够满足机组额定工况下运行的生产需要,达到了工业化运行生产能力,同时分选的等级灰提高了粉煤灰综合利用的经济价值。
It will save much water and land resources and make less pollution to the environment by using pneumatic ash removal technology in the coal-fired power plant. After separation, the fly ash would make considerable benefits. Based on the arrangement and problems of the first-stage 300MW unit ash removal system of the HARV power plant, the subject put forward a new scheme of negative pressure collecting, separating and positive pressure transportation. The project includes the design of the system, construction and debugging. After renovation, the ash removal system and the unit work very well. Furthermore the ash product degree of fineness meets the specification and yields good economic returns.
引文
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