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热电厂气力除灰系统工艺

Time: 2016/11/21 15:28:05

1.适用范围:
       适用于中小型热(火)电厂(200MW及以下机组配套锅炉)气力除灰系统,干灰输送距离当量在300m(高度90m)以下、系统输送能力100t/h以下时,系统性价比*。该系统属低正压稀相输送系统。
2.主要功能:
      干灰从电除尘器(或布袋除尘器)灰斗中经落灰管进入缓冲仓及连续输送泵,以罗茨鼓风机为气源(压力98KPa以下),以一定的速度通过输灰管道输送至灰库,料气分离后气体经过袋式除尘器后排入大气。灰库干灰卸灰设有干排(汽车散装机)和湿排(加湿搅拌机)两种方式,用户可根据粉煤灰用途情况进行选择。
3.核心设备:
       低压气力输送设备粉末输送泵,具有输送稳定、操作维护简单、易损件很 少等特点。另外,系统的风量、风压、管道及库顶袋式除尘器等合理配置,对系统的稳定运行也将产生至关重要的影响。
4.系统特点:
       性能稳定,可靠性高。低压气力输送设备粉末输送泵采用连续运行,*可靠,输送泵运行方式不存在堵管现象;采用罗茨风机为气源,罗茨风机的高可靠性也决定了系统的可靠性。
       工艺简洁,免维护,设备部件少,无频繁动作,故障率很 少,几乎没有易损件。低压连续输送,管内流速低且恒定,因而磨损小。
       能耗低,运行费低,综合投资节省。系统配置低压罗茨风机,比仓泵系统节能20%以上,运行费比仓泵系统节省50%以上,综合投资比仓泵系统节省30%以上。
      自动化程度高,操作简单。现场手动操作简单,“傻瓜机”式操作,对运行人员技术条件要求低。
      工艺布置灵活。根据除尘器灰斗布置情况,低压气力输送设备粉末输送泵送泵可布置成一斗一泵单管、多斗一泵单管输送。

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