Sand-water separator for pretreatment

The utility model relates to a sand-water separator for pretreatment, which comprises a separator body, a baffle plate is arranged in the separator body, the baffle plate divides the interior of the separator body into a sand reducing area and a liquid discharging area, a spiral conveying blade is arranged below the sand reducing area, an air pipe is arranged in the sand reducing area, and the liquid discharging area is arranged in the air pipe. A sludge discharge pipe is arranged on the side wall, corresponding to the liquid discharge area, of the separator body. Due to the design of the baffle, the sand blocking effect can be well achieved, sand is blocked in the sand falling area, mud and water enter the liquid discharging area, and meanwhile the mud is discharged outwards through the mud discharging pipe. 本实用新型涉及一种预处理用砂水分离器，包括分离器本体，所述分离器本体内部设置有挡板，该挡板将分离器本体内部分为降砂区域和排液区域，所述降砂区域的下方设置有螺旋输送叶片，所述降砂区域设置有气管，所述排液区域对应的分离器本体的侧壁上设置有排泥管。本实用新型中挡板的设计可以很好地起到挡砂的作用，将砂挡在降砂区域，泥和水进入到排液区域，同时通过排泥管将泥向外排出。