Efficient sludge treatment system

Abstract

The invention discloses an efficient treatment system of oil sludge. The TPH (total petroleum hydrocarbons) content of the oil sludge treated is less than 1%. The oil sludge enters a dryer with a stirrer and an outer heating coil and is subjected together with hydrogen separated by a nitrogen making machine, to heat exchanging via heat transfer oil, a resulting product is subjected with oil sludge directly to convection drying, cracking heat of a thermal desorption unit performs on indirect heating on the oil sludge through the outer heating coil of the dryer, viscosity of the oil sludge is decreased after free water, interstitial water and part of light gases are removed, chances that the oil sludge cake in the heat desorption unit are also slimmed, and long-term running of the thermal desorption unit is guaranteed; the dryer with the stirrer and the outer heating coil uses the cracking heat of the thermal desorption unit, thus energy is saved; gases subjected to oil removal, dust removal and odor removal are used as fuels for a combustor, thus energy is saved; high-hydrogen gas from the dryer with the stirrer and the outer heating coil separates oil and water through bubbles generated by an air flotation machine, oil-water separation is efficient, and the separated oil is used as a fuel for the combustor, thus energy is saved.

Description

technical field [0001] The invention relates to the technical field of environmental protection and soil remediation, in particular to a high-efficiency oil sludge treatment system. Background technique [0002] High-efficiency sludge treatment is a technology for environmental protection and soil restoration. Oily sludge is oily sludge, which is a highly volatile, high-viscosity organic hazardous substance composed of minerals, mineral oil and water produced in oil fields and petrochemical production processes. If it is discharged without treatment, it will cause serious harm to the local environment. Oil sludge contains high content of TPH, if it is recycled, its heat can be used as energy. Therefore, the treatment of oil sludge can solve the serious environmental pollution problems faced by the petrochemical industry, and can also use its heat source, which not only protects the environment but also realizes the sustainable development of resources. [0003] At present...

AI Technical Summary

Problems solved by technology

The anaerobic pyrolysis method does not make full use of the heat source generated by the pyrolysis of oil sludge, resulting in waste of heat source, and the oil sludge is easy to stick in the pyrolyzer, which will increase the operation failure of the equipment, and the oil sludge cannot be processed in time, which will increase the risk of environmental pollution

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