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In the petroleum and petrochemical industry, the treatment of oily sludge has always been a difficult problem to be solved. Oily sludge not only contains high concentrations of mineral oil, but also may contain toxic and harmful substances such as heavy metals and benzene. If not handled properly, i

In the petroleum and petrochemical industry, the treatment of oily sludge has always been a difficult problem to be solved. Oily sludge not only contains high concentrations of mineral oil, but also may contain toxic and harmful substances such as heavy metals and benzene. If not handled properly, it will pose a serious threat to the environment and human health. Therefore, it is particularly important to adopt efficient and environmentally friendly sludge treatment technology.

The oily soil hot washing system launched by Desen Environment uses a physical hot washing process to efficiently grade and reduce the amount of oil-contaminated soil, achieving the comprehensive restoration goals of waste oil recovery, solid material backfilling and mud cake material up-to-standard disposal. The system includes a feeding module, a scrubbing module, a multi-stage washing and grading module, an efficient concentration module, a filter press module, a water treatment module and an electrical control module, which can fully cope with complex and diverse sludge treatment needs.

Chemical hot washing technology is the core of Desen's oily soil hot washing system. This technology uses a cleaning agent to reduce the interfacial tension between mineral oil and solid matter, destroy the emulsification system, and achieve oil, water, and solid three-phase separation, thereby effectively removing harmful substances in sludge. Compared with traditional methods such as incineration and solidification, the chemical hot washing process has significant advantages of low investment, low cost, high oil recovery rate and large processing capacity.

The Desen oil-containing soil hot washing system not only performs well in environmental protection, but also has achieved remarkable results in economic benefits. The waste oil treated by the system can be recycled and reused, the solid material can be safely backfilled, and the mud cake material meets the national emission standards, avoiding secondary pollution. In addition, the system also has modular design and intelligent control system, which can quickly respond to sudden oil pollution incidents, reduce manual intervention and improve processing efficiency.

The Desen oil-containing soil hot washing system has been successfully applied in many oil-contaminated sites. For example, in the petroleum hydrocarbon contaminated soil remediation project of Ningxia Second Auxiliary Factory, the system promoted the dissolution or migration of petroleum pollutants through chemical/biochemical solvents, and effectively treated contaminated soil under complex geological conditions. In addition, the system has played a key role in many projects such as Shanghai Putuo Chemical Site and Changsha Chromium Salt Plant, with a cumulative soil treatment of more than 1 million tons and a remediation efficiency of more than 90%.

With increasingly stringent environmental protection requirements, the harmless treatment of oil-containing sludge has become an important topic in the petrochemical industry. Desen's oily soil hot washing system, with its high efficiency, environmental protection and economic characteristics, provides an ideal solution to this problem. In the future, Desen Environment will continue to be committed to technological innovation, promote the development of environmental protection, and contribute to the realization of sustainable development.