New technology of sludge dewatering

Today, the editor of Zhongshan Green Energy Oil Separation Technology Service Co., Ltd. will take you to see the new technology of oil sludge dewatering. Oily sludge contains a lot of benzene series, phenols, anthracene, pyrene and other odorous toxic substances. Direct discharge without treatment will not only occupy a large amount of cultivated land, but also cause pollution to the surrounding soil, water and air. The sludge also contains a large amount of pathogenic bacteria, parasites (eggs), copper, zinc, chromium, mercury and other heavy metals, salts and refractory toxic and harmful substances such as polychlorinated biphenyls, dioxins, and radionuclides. At present, the demulsification of waste oil and the separation of oil sludge and sand has been classified as a hazardous waste by the state. Demulsification and separation of waste oil Since the mid-1980s, developed countries such as the United States, Japan, Germany, and the former Soviet Union began to study methods and processes for treating oil sludge with high efficiency and low consumption. At present, the methods of treating oily sludge at home and abroad generally include: incineration method, biological treatment method, thermal washing method, solvent extraction method, chemical demulsification method, solid-liquid separation method, etc. Although there are many treatment methods, they are not popularized due to the shortcomings of weak pertinence and high treatment cost. The comprehensive treatment of oily sludge to be harmless, clean and recover its resources has become one of the focuses of environmental protection and petroleum industry at home and abroad. Incineration method The petrochemical enterprises in France and Germany mostly use the method of incineration. The demulsification and separation of aging heavy oil is first subjected to preparation and dehydration pretreatment. The sludge after demulsification, dehydration and concentration of sewage oil is dehydrated and dried by equipment, and the mud cake is sent to incineration. The furnace is incinerated, and the ash is used for road construction or buried in the designated ash and slag landfill, and the heat generated by the incineration is used for heating and power generation. The treatment object of demulsification and dehydration incineration of sewage oil is mainly sludge with oil content of 5-10%. The incineration temperature is generally controlled at 800-1000℃, the incineration time is controlled at 0.5-1.5h, and 50-100% excess air is used. The vast majority of refineries in my country have built sludge incinerators, such as the downstream rotary incinerators used by Hubei Jingmen Petrochemical Plant and Changling Petrochemical Plant; the fluidized bed incinerators used by Yanshan Petrochemical. To do demulsification and separation of waste oil, go to Green Energy Oil Separation Technology Service Co., Ltd. Website: Keywords: sludge treatment, demulsification and separation of waste oil, demulsification and dehydration of dirty oil