天然气净化厂含醇污泥的无害化处理研究

发布时间：2018-01-10 10:00

  本文关键词：天然气净化厂含醇污泥的无害化处理研究　出处：《西安石油大学》2016年硕士论文　论文类型：学位论文

  更多相关文章： 含醇污泥 含醇量 焚烧条件 固化配比

【摘要】：在天然气开采以及对含醇污水进行处理的过程中,会产生大量的含醇污泥。经压滤装置挤压处理后,仍含有很高的含水量、含醇量、含油量、无机盐及金属离子等,未经处理直接堆放于地表,会对油气田周围环境的造成严重的危害。通过对含醇污泥的组分特性进行分析,根据含醇污泥在焚烧前后的失重率,以及其浸出液中COD和含醇量的量,确定出了最佳的焚烧温度和焚烧时间;并利用水泥、砂子、石灰和添加剂对焙烧后的含醇污泥进行固化研究,考察了固化时间,水泥加量、砂子加量、石灰加量和添加剂加量对固化块的抗压强度以及其浸出液COD的影响;并通过正交实验确定出了影响固化强度的主要因素,以及最佳的固化配比方案,最后结合实际操作情况,确定最佳的含醇污泥无害化处理方案。结果表明:经机械装置压滤后的含醇污泥其含醇量为6.4%,含油量为3.1%,含水率为62.90%,其浸出液中含醇量为0.641%,含油量为7.3mg/L,COD含量为6112mg/L;当焙烧温度达到680℃,焙烧时间为45min后,污泥的失重率基本不变,其浸出液COD为82.6mg/L,含醇量为0.178%;污泥固化最佳的配比为水泥/污泥=1.2,砂子/污泥=1.0,石灰/污泥=0.2,添加剂A/污泥=0.08,此时固化块的平均抗压强度达到17.57MPa,浸出液COD为54.5mg/L,密度为1708 kg/m~3达到了国家对混凝土实心砖的相关标准,达到密度等级B级(1681~2099kg/m3),其强度等级达到MU 15的标准要求。因此,该固化方案可行,并能够达到资源化利用的目的。
[Abstract]:In the process of natural gas exploitation and treatment of wastewater containing alcohols, a large amount of sludge containing alcohol will be produced. After being extruded by pressure filtration device, there are still high water content, alcohol content and oil content. Inorganic salts and metal ions, which are stacked directly on the surface without treatment, will cause serious harm to the surrounding environment of oil and gas fields. According to the weight loss rate of the sludge containing alcohol before and after incineration, and the amount of COD and alcohol in the leachate, the best incineration temperature and time were determined. Cement, sand, lime and additives were used to solidify the calcined sludge containing alcohol. The curing time, the amount of cement and the amount of sand were investigated. The influence of lime and additive on the compressive strength of solidified block and the COD of its leaching solution; The main factors affecting the curing strength and the optimum curing ratio were determined by orthogonal experiment. Finally, the actual operation was combined. The results showed that the alcohol content, oil content and moisture content were 6.4, 3.1 and 62.90% respectively. The alcohol content in the leachate was 0.641 and the oil content was 7.3 mg / L ~ (-1) COD content was 6112 mg 路L ~ (-1) 路L ~ (-1); When the calcination temperature reached 680 鈩，

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