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With the rapid development of industry, the amount of oil sludge generated is increasing, causing serious pollution to the environment. The disposal of oil sludge has become one of the important topics in the field of environmental protection. Among the many oil sludge disposal processes, the chemic

With the rapid development of industry, the amount of oil sludge generated is increasing, causing serious pollution to the environment. The disposal of oil sludge has become one of the important topics in the field of environmental protection. Among the many oil sludge disposal processes, the chemical hot washing process has become one of the earliest and most widely used technologies with its advantages of low investment, low processing cost, high oil recovery rate and large processing capacity.

The basic principle of chemical hot washing is to use a cleaning agent to strip, desorb, displace, or destroy the emulsification system from solid substances such as clay minerals under the optimal process parameters to achieve oil, water and solid three-phase separation. In this process, the cleaning agent plays a key role. The cleaning agent can reduce the interfacial tension between mineral oil and solid substances, making it easier to separate mineral oil from solid substances. At the same time, the cleaning agent can also destroy the emulsification system in the oil sludge, making the oil, water and solid three-phase separation more thorough.

The Desen oil-bearing soil hot washing system mainly includes a feeding module, a scrubbing module, a multi-stage washing and classification module, a high-efficiency concentration module, a filter press module, a water treatment module, an electrical control module, etc.

The feeding module is mainly responsible for transporting the oil sludge to the scrubbing module. The feeding module usually uses equipment such as screw conveyors and belt conveyors to transport the sludge from the storage site to the scrubbing module.

The scrubbing module is one of the core modules of the Desen oil-bearing soil hot washing system. The scrubbing module is mainly responsible for stripping, desorbing and displacing mineral oil from solid substances such as clay minerals. The scrubbing module usually uses equipment such as agitators and scrubbers to fully mix the cleaning agent with the sludge to separate the mineral oil from the solid matter.

The multi-stage washing and grading module is mainly responsible for separating and grading the mineral oil, water and solid matter in the sludge. The multi-stage washing and grading module usually uses equipment such as flotation machines and centrifuges to separate and grade the mineral oil, water and solid matter in the sludge to achieve three-phase separation of oil, water and solid.

The high-efficiency concentration module is mainly responsible for concentrating the mineral oil in the sludge. The high-efficiency concentration module usually uses equipment such as concentrators and filters to concentrate the mineral oil in the sludge and improve the oil recovery rate.

The filter press module is mainly responsible for filtering the solid matter in the sludge. The filter press module usually uses equipment such as a filter press to filter the solid matter in the sludge, so as to achieve solid material backfilling and standard disposal of mud cake materials.

The water treatment module is mainly responsible for treating the wastewater in the sludge. The water treatment module usually uses sedimentation tanks, filters, reverse osmosis and other equipment to treat the wastewater in the sludge and achieve standard discharge of wastewater.

The electrical control module is mainly responsible for controlling and monitoring the various modules of the Desen oil-bearing soil hot washing system. The electrical control module usually uses PLC control systems, sensors and other equipment to control and monitor the various modules of the Desen oil-bearing soil hot washing system to achieve automatic operation.

The chemical hot washing process has the advantages of low investment, low processing cost, high oil recovery rate and large processing volume, so it has broad application prospects in the field of sludge disposal. With the continuous improvement of environmental protection requirements and the continuous advancement of technology, the chemical hot washing process will be more widely used.

In the future development, the chemical hot washing process will continue to be improved and perfected. On the one hand, more efficient and environmentally friendly cleaning agents will be developed to improve the cleaning effect and reduce environmental pollution. On the other hand, the hot washing process parameters will be optimized to improve oil recovery and reduce processing costs. At the same time, the automated control and monitoring of the chemical hot washing process will be strengthened to improve production efficiency and stability.