Apparatus and method for cleaning contaminated soil
    1.
    发明授权
    Apparatus and method for cleaning contaminated soil 失效
    清洁污染土壤的设备和方法

    公开(公告)号:US4576572A

    公开(公告)日:1986-03-18

    申请号:US736429

    申请日:1985-05-20

    摘要: Apparatus and method for effecting thermal reclamation of granular materials, particularly foundry sand and contaminated soil. In a first embodiment, a sand calciner system (10) includes a refractory-lined drum (12) mounted for oscillation about its longitudinal axis (14). An arrangement of plows (76) are provided along the bottom inside of the drum (12) for mixing the sand received through an inlet (54) and advancing it toward a discharge outlet (56) responsive to oscillation of the drum over a predetermined arc about the axis (14). The plows (76) are arranged in staggered rows with each plow having a transverse front surface facing the inlet (54), an inclined top surface, and an angled back surface facing the outlet (56). An aerator pipe (78) is provided in conjunction with the plows (76) to fluidize the sand and thereby effect more thorough mixing and exposure to burners (58) positioned along the upper side of the drum (12) for complete calcining. A tempering section (16) and screening section (18) are preferably connected to the discharge end of the drum (12) to pre-cool the calcined sand and then classify it for further handling and reuse in foundry cores and molds or the like. In a second embodiment, the system (130) is particularly adapted for cleaning soil contaminated with pentachlorophenol, creosote, oil, fuel or other hydrocarbon-rich liquids.

    摘要翻译: 用于实现颗粒材料,特别是铸造砂和污染土壤的热回收的装置和方法。 在第一实施例中,砂煅炉系统(10)包括安装成围绕其纵向轴线(14)摆动的耐火材料衬里的滚筒(12)。 沿着滚筒(12)的底部内部设置有犁(76)的布置,用于混合通过入口(54)接收的砂并将其推向排出口(56),以响应于滚筒在预定弧上的振荡 围绕轴线(14)。 犁(76)以交错排布置,每个犁具有面向入口(54)的横向前表面,倾斜的顶表面和面向出口(56)的成角度的后表面。 与犁(76)结合设置曝气管(78)以使砂流化,从而实现更彻底的混合和暴露于沿着滚筒(12)的上侧定位的燃烧器(58),以便完全煅烧。 回火部分(16)和筛分部分(18)优选地连接到滚筒(12)的排出端,以预煅烧煅烧砂,然后对其进行分类,以便在铸造芯和模具等中进一步处理和再利用。 在第二实施例中,系统(130)特别适用于清洁被五氯苯酚,杂酚油,油,燃料或其它富含烃的液体污染的土壤。

    Apparatus and method for calcining sand
    2.
    发明授权
    Apparatus and method for calcining sand 失效
    煅烧砂的设备和方法

    公开(公告)号:US4518350A

    公开(公告)日:1985-05-21

    申请号:US594557

    申请日:1984-03-29

    摘要: A sand calciner system (10) includes a refractory lined drum (12) mounted for oscillation about its longitudinal axis (14). An arrangement of plows (76) are provided along the bottom inside of the drum (12) for mixing the sand received through an inlet (54) and advancing it toward a discharge outlet (56) responsive to oscillation of the drum over a predetermined arc about the axis (14). The plows (76) are arranged in staggered rows with each plow having a transverse front surface facing the inlet (54), an inclined top surface, and an angled back surface facing the outlet (56). An aerator pipe (78) is provided in conjunction with the plows (76) to fluidize the sand and thereby effect more thorough mixing and exposure to burners (58) positioned along the upper side of the drum (12) for complete calcining. A tempering section (16) and screening section (18) are preferably connected to the discharge end of the drum (12) to precool the calcined sand and then classify it for further handling and reuse in foundry cores and molds or the like.

    摘要翻译: 砂煅烧系统(10)包括安装成围绕其纵向轴线(14)摆动的耐火材料衬里滚筒(12)。 沿着滚筒(12)的底部内部设置有犁(76)的布置,用于混合通过入口(54)接收的砂并将其推向排出口(56),以响应于滚筒在预定弧上的振荡 围绕轴线(14)。 犁(76)以交错排布置,每个犁具有面向入口(54)的横向前表面,倾斜的顶表面和面向出口(56)的成角度的后表面。 与犁(76)结合设置曝气管(78)以使砂流化,从而实现更彻底的混合和暴露于沿着滚筒(12)的上侧定位的燃烧器(58),以便完全煅烧。 回火部分(16)和筛分部分(18)优选地连接到滚筒(12)的排放端,以预煅烧煅烧砂,然后对其进行分类,以便在铸造芯和模具等中进一步处理和再利用。