流体激波污泥改性工艺提高污泥水煤浆浓度的研究

CWM concentration improvement by shock wave fluid modified sludge process

利用碱性物质对污泥改性的基础上,采用流体激波改性工艺进行了提高污泥水煤浆浓度的研究。结果表明:与单独用碱性物质相比,采用以上组合方式对污泥进行改性大大提高了污泥改性效果。主要表现在经流体激波改性后,改性污泥黏度大幅下降,流动性明显改善;其次,经流体激波改性制备的污泥煤浆性能与单纯碱性物质改性相比,浓度至少提高了2.5%。这主要是因为污泥经流体激波改性后,在高压和超细粉碎的作用下,污泥中的聚丙烯酰胺部分降解,释放出部分自由水,改善了污泥成浆性,从而使污泥煤浆浓度进一步提高。

To improve CWM concentration, based on the sludge modification process by alkaline matter, adopt the shock wave fluid technique. Compared with the alkaline matter modified sludge technique, the combined method greatly improves the modified effects. Through shock wave fluid modification, the viscosity of sludge decreases sharply and the fluidity improves obviously. The concentration of prepared CWM increase more than 2.5 percent. This is mainly because part of polyacrylamide in sludge degrade and release free water under high pressure and super fine crash condition, which is created by shock wave fluid technology.