Solidification and concentration of oil sludge reduction treatment equipment

Description :

　　During the process of oil extraction, storage, and production processing, a large amount of waste oil sludge is generated. These oil sludge have a large volume and not only contain petroleum resources, but also contain a large amount of toxic and harmful substances such as radioactive elements, dioxins, and pathogens that are difficult to degrade. The composition of oil sludge is extremely complex and varies with different geological conditions and production processes. It is generally composed of water, soil, oil organic matter, etc. Oil sludge mainly has the following characteristics: high water content and large volume; Complex ingredients and difficult processing; Contains a large amount of dirty oil and flammable substances; Most harmful components exceed the emission standards. With the increasingly tight supply of petroleum resources and the further improvement of environmental regulations, the reduction, harmlessness, resource utilization, and cleaning technology of oil sludge will become an inevitable trend in its development. Exploring economic, environmentally friendly, and practical treatment methods and devices, effectively collecting and resource utilizing them, can not only recover a large amount of petroleum resources and create certain economic benefits, but also effectively protect the environment and reduce the huge cost of oil sludge treatment and disposal.

　　In the existing technology, the methods for treating oily sludge at home and abroad generally include incineration, biological treatment, hot washing, solvent extraction, chemical demulsification, solid-liquid separation, coking, oily sludge conditioning, and comprehensive utilization of oily sludge. But they all have different problems and are not suitable for practical applications. The incineration method consumes a lot of energy, is prone to secondary pollution, and oil resources have not been recycled; The biological treatment method takes 41 days to biodegrade 97% of petroleum hydrocarbons, and the oil resources have not been recycled; The problems with solvent extraction method are long process, complex technology, high processing cost, and it is only suitable for oily sludge containing a large amount of difficult to degrade organic matter; Chemical demulsification method requires the addition of demulsifier and heating for severely emulsified oily sludge; The solid-liquid separation method has a low oil recovery rate for oily sludge with high oil content and severe pollution. The above treatment methods have not simultaneously met the requirements of sludge reduction, harmlessness, resource utilization, and cleanliness, and cannot be widely promoted and applied in China.

　　The following introduces the process of reduction treatment:

　　The treatment method of solidifying and concentrating oil sludge reduction equipment includes the following steps:

　　S1、 Heat and stir the oily sludge, let it stand for 0.5-4 hours, and then perform solid-liquid separation to obtain oily sludge and oily liquid;

　　S2、 Introduce the oily liquid obtained in step S1 into the sewage treatment system for oil-water separation, and extract and purify the separated oil;

　　S3、 Add chemicals to the oil sludge obtained in step S1 for conditioning, followed by deep dehydration to obtain the dehydrated oil sludge and filtrate, and then perform the operation in step S2 on the filtrate;

　　S4、 Dry the oil sludge after dehydration in step S3, and then perform pyrolysis carbonization treatment after drying.

　　The advantages of the solidification and concentration oil sludge reduction treatment equipment compared to existing technologies are:

　　The treatment method for oily sludge is simple and effective, which can quickly achieve three-phase separation of sludge, oil, and water under low temperature conditions. Chemicals are added to the sludge phase for deep dehydration, followed by drying and carbonization. Carbonized products can be used as soil amendments or porous adsorption materials to achieve the reduction, harmless, and resourceful treatment of oily sludge;

　　The treatment method of the solidified and concentrated oil sludge reduction equipment simplifies the process flow of oil sludge treatment, with simple and smooth operation, effectively achieving the three-phase separation of sludge, oil, and water. The sludge is coherent and carbonized. After high-temperature treatment, harmful pathogens in the sludge are killed, and heavy metals are chelated and fixed to form a stable state. Compared with traditional treatment methods, the final moisture content of the carbonized material in the present invention is below 1%, and the sludge is reduced by more than 90%. The carbonized material undergoes a qualitative change and no longer turns into sludge when it encounters water, with high stability.

　　Follow the issue later!

　　At present, most of the surfactants used for sludge dewatering are widely used reagents that are suitable for multiple fields. However, surfactants based on sludge components and properties have not been reported. Therefore, research and development of specialized surfactants for oily sludge is a direction that can be considered for future reagent development. The process treatment mainly focuses on the oxidation modification of Fenton and Fenton like agents, and there are few reports on the related processes of other oxidants. It is recommended to conduct systematic research.

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