Bottom Front End Filtration 槽前端过滤
Filtering paint drawn from the floor of the tank at the bottom of the entrance decline has been proven essential to the removal of dirt from the paint. This concept is known as bottom front-end filtration. It is most effective for tanks having one-directional paint flow on the bottom of the tank. Bottom front-end filtration (for new construction) has two basic designs (see Figure 5)
实践证明，要从电泳槽中除去杂质需从槽底的进口倾斜面处抽出过滤漆液。这个概念称为槽底前端过滤，它对具有单一流向的槽最有效。槽前端过滤（作为新结构）有两种基本设计（见图5）：
The simplest of these is a floor box. A shallow trough 12 x 12 inches (30 x 30 cm.) is constructed the width of the tank at the bottom of the entrance decline (below floor level) to act as a collection site for dirt and allow for complete drainage. Three suction headers (pump controlled) are installed in parallel to effect uniform suction along the width of the trough. 第一种是称为“底盒”的最简单设计，将进口端倾斜面底部（低于槽底）沿槽宽方向设计成12x12英吋(30 x 30 cm.)浅槽，起收集染质作用。在同一方向沿槽宽安装三个用泵控制的三个吸口，均匀析出槽液。 The second design, the plated funnel, consists of an extension box attached to the tank floor below the entrance decline which has funnel-shaped side walls ending in a single suction header. The top of the box is an adjustable plate which extends the width of the tank to regulate paint flow into the funnel. The plate is angled so that it forms the lower portion of the entrance decline. Adjustment of the plate is usually made only when the tank is first filled. This design is used mainly for vertical pump systems equipped with pump wells. However, it can be used with either pumping system. 第二种设计为“沉积漏斗”，由一个附于槽底板进口倾斜底部的延伸状的盒体组成，漏斗状边壁端部是一个吸管口，盒体上部是一块覆盖槽宽的可调平板，用于调节漆液流入漏斗。此板宜倾斜布置，使之构成进口端倾斜底的最低部分。通常，在首次建槽加料时对此板进行调整。这种设计主要用于配有泵池的立式泵系统。事实上任何形式的泵系统均可用。 Fifty to sixty percent of the circulated paint should be drawn from the bottom front-end filtration system. Non-conductive screens (FRP, fiberglass, or coated stainless steel) of adequate strength should be installed to prevent large debris from entering and blocking the piping system. The screen's open surface area should be as large as possible to facilitate circulation and to prevent plugging from debris. Two-inch grating works well. This type system is used for both horizontal and vertical pumping systems. 有50-60%的循环漆液需要通过槽底前端过滤系统。为防止大颗粒染质进入并堵塞泵体，应装有适当强度的不导电筛网（纤维增强塑料，玻璃纤维或涂漆不锈钢），筛网的开孔面积应尽可能大，以利于保证循环及防止染质堵塞。2英寸的网格较好。此种类型 只适用于卧式泵系统。