论文部分内容阅读
国内每年产生大量的污泥,其无害化处理、废物重新利用的技术是解决疏浚污泥污染问题的必由之路,而污泥固化技术是其重要的途径。纸浆渣烧结灰自身所具有的吸水性和自硬性是一种研制廉价污泥固化剂配方的重要成分,是把造纸产业废弃物和生产废弃物同时再利用的环保工法,具有现实的研究价值。对纸浆渣烧结灰基本特性进行了试验研究,并在此基础上进行了污泥固化的试验研究,主要包括纸浆渣烧结灰酸碱度试验、吸水率试验、微观结构试验、抗剪强度试验和污泥固化土的无侧限抗压强度试验,结果表明,纸浆渣烧结灰呈弱碱性;吸水性随着压力的增大而减小,存在一个最小吸水率;抗剪强度随含水率的增加而减小,且具有自硬性。纸浆渣烧结灰可提高水泥固化污泥的无侧限抗压强度,并且水泥的掺入含量越高,其强度的提高越显著。
A large amount of domestic sludge is produced annually. The technology of decontamination and reuse of waste is the only way to solve the problem of dredging sludge pollution. Sludge solidification technology is an important way. Pulp residue sintering ash itself has the water absorption and self-hardening is an important component of the development of cheap sludge curing agent formulations, is the papermaking industry waste and production waste at the same time recycle environmental methods, with realistic research value. The basic characteristics of pulverized coal ash were studied. Based on this, experimental studies on sludge solidification were carried out, including the tests of ash acidity and alkalinity, water absorption, microstructure, shear strength and sludge Unconfined compressive strength tests of cured soil show that the ash of pulping slag is weakly alkaline. The water absorption decreases with the increase of pressure, and there exists a minimum water absorption. With the increase of moisture content Reduce, and have self-hardening. Pulp ash can increase the unconfined compressive strength of cement-cured sludge, and the higher the cement content, the more significant the increase of strength.