石化废水生物处理剩余污泥制备水处理滤料的研究

Preparation of filter material by using residual sludge after petrochemical wastewater biological treatment

针对石化废水生物处理剩余污泥最终处置难题,利用其有机物含量高、热值大这一特点,研究了一种以石化剩余污泥、粉煤灰、河道底泥、废玻璃粉及黏土为原料,经煅烧制备水处理滤料的方法。利用XRF分析原料化学组分,以F/SA比和Riley相图设计滤料配比和升温烧成曲线。当石化剩余污泥20%、河道底泥40%、粉煤灰30%、玻璃粉10%时,经1 150℃煅烧所得成品理化参数为比表面积2.18 m2/g,空隙率48.9%,盐酸可溶率1.65%,堆积密度0.75 g/cm3,达到国家《水处理用人工陶粒滤料》(CJ/T 299—2008)标准规定要求。

To solve ultimate disposal problem of residual sludge after petrochemical wastewater biological treatment, a kind of water treatment filter material is prepared by using residual sludge with great organic matter and calorific value, fly ash,river sediment,waste glass powder and clay as raw materials. The chemical composition of raw material is analyzed by XRF. The raw material ratio and temperature firing curve are settled by F / SA ratio and the Riley phase diagram. The effects of raw material ratio,calcination temperature and other parameters on physical and chemical properties of the filter are studied by measuring the solubility in hydrochloric acid,specific surface area and porosity. The microstructure and the mineral phase composition of the filter material are analyzed by SEM and XRD,respectively. The expansion and porosity mechanism of residual sludge after petrochemical wastewater biological treatment is the ignition of carbonaceous organic matter entirely. The final filter materials can be achieved by calcining 20% mass ratio petrochemical sludge,40% mass ratio river sediment,30% mass ratio fly ash and 10% mass ratio glass ash at 1150℃. The physicochemical properties of the final filter materials are as follows： 2. 18 m^2/ g of the specific surface area,48. 9% of the porosity,1. 65% of the solubility in hydrochloric acid and 0. 75 g / cm^3 of the bulk density. All these parameters can meet the national standards《Artificial ceramsite filter material for water treatment》（ CJ / T 299—2008）.