定期或连续地排除锅炉的灰渣，是保证煤在炉膛内正常燃烧及锅炉安全经济运行的必要条件之一。目前在中小型电站多采用水力除灰渣方式，该方式运行安全可靠，输送过程中灰尘不飞扬，卫生条件好，并且操作维护简便，劳动强度较小，节省人力，其一般工艺流程见图1：电厂除灰系统运 Regular or continuous removal of boiler ash is to ensure that the normal combustion of coal in the furnace and boiler safe and economical operation of the necessary conditions. At present, more and more small and medium-sized hydropower ash removal method, the safe and reliable operation of the transport process does not fly dust, good sanitary conditions, and easy operation and maintenance, labor-saving, labor-saving, the general process shown in Figure 1 : Power plant ash removal system