单泵清淤,就是只用一台泵清除井底淤积的泥沙。具体做法见图。首先挖好沉淀池,供给足够的清水(引沟、渠水等)。选择流量小、扬程高的离心泵,如3BA-9或3BA-6等皆可。排沙管:直径4英寸,每节长6～8米,法兰盘联结;管的底部一米长的范围内全部钻上小孔,清淤时此段带孔的管子播入淤泥中。冲沙管为2英寸胶管,插入排沙管的一端接一简易喷枪。简易喷枪用直径1英 A single pump dredging, that is, only one pump to remove sediment siltation well bottom. See the specific approach. Dredge the sedimentation tank first and supply enough water (ditches, canal water, etc.). Choose a small flow, high lift centrifugal pump, such as 3BA-9 or 3BA-6 and so on. Sand drain pipe: 4 inches in diameter, each section of 6 to 8 meters long, the flange connection; the bottom of the tube within a meter long all drilled holes, dredging this section of perforated pipe into the silt. Red sand tube for the 2-inch hose, insert one end of the sand drain connected to a simple spray gun. Simple spray gun with a diameter of 1 英