First of all, it is necessary to select the appropriate molecular weight, appropriate ion degree and ion type flocculant as the agent for sludge dewatering according to different sludge properties, rather than the flocculant with high price, high ion degree and large molecular weight, which must be effective. To achieve this, it is necessary to screen suppliers and drug varieties, and conduct a beaker comparison test and a computer test for fine selection. Secondly, the configuration of the flocculant solution is also very important. The flocculant should be prepared on the same day, used on the same day, and allowed to stand and mature properly after the preparation is completed. The configuration concentration should not be too high, preferably 0.05-0.1%, the flocculant solution must be fully stirred and dissolved, and there should be no undissolved lumps and a large number of incompletely dissolved swollen fisheye particles.
In order to avoid the clogging problem of the stacked screw sludge dewatering machine, a relatively new type of filter structure has emerged, such as a grid filter structure, a movable and fixed ring filter structure, and so on. Among them, the dynamic and fixed ring structure filter screen of the stacked screw sludge dewatering machine is covered with multiple ring pieces on the screw shaft. The ring pieces are divided into two types, the fixed ring piece and the movable ring piece. The fixed ring and the movable ring are separated from each other and have a certain filtering gap. Through the friction of the material between the movable ring and the fixed ring, the friction force that promotes the extrusion of the material is greater than the hindrance, thereby improving the filtering and separating effect of the material and avoiding Blocking of high-viscosity materials.
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