Oily sludge treatment device and method

Abstract

The invention discloses an oily sludge treatment device and a method. The oily sludge treatment device comprises a pretreatment system, a thermal phase separation system, a condensation system and anoil-water separation system. Wherein the pretreatment system is mainly used for pretreating sludge, removing impurities in the sludge and adjusting the attribute of the oily sludge, and the pretreatedoil-containing sludge is pumped to the thermal phase separation system; the thermal phase separation system is mainly used for indirectly heating the oily sludge to separate oil from solid, and thermal desorption gas is sucked into the condensation system to be condensed; and the condensed oil-water mixture is enabled to enter the oil-water separation system for oil-water separation, separated oil is conveyed to an oil product tank for storage, and water is recycled after heat exchange. According to the invention, continuous feeding and discharging can be realized, and the production efficiency is high; the automation degree is high, and the heating process is started and stopped by one key; a cavity is heated in an anaerobic or hypoxic state, so that safety and reliability are realized;the flue gas emission meets the emission standard; various fuels are selected, the energy consumption is low, the operation cost is low, the fuels are customized according to customers, and the profitis maximized.

Description

technical field [0001] The invention relates to the technical field of sludge treatment, in particular to an oily sludge treatment device and treatment method. Background technique [0002] In the process of petroleum refining, a large amount of oil, mud and water mixture containing petroleum hydrocarbons will be produced due to process equipment, human operation and other reasons. This mixture is called oil sludge. The sludge generated in the wastewater treatment system of the refinery mainly comes from the bottom sludge of the grease trap and the scum of the flotation tank. Oil sludge has complex properties, oil, water, and mud are difficult to separate, and it is difficult to transport in a liquid state, which will incur high transportation costs, and it will be directly sent to a hazardous waste disposal center without pretreatment for high disposal costs. [0003] Oil sludge has a high moisture content, so it needs to spend a high processing cost when it is processed. ...

AI Technical Summary

Problems solved by technology

At present, there are two conventional treatment methods: solidification and safe landfill: the oil sludge has a high moisture content and poor soil mechanical properties, and a large amount of soil needs to be mixed in, resulting in a significant decrease in the volume utilization coefficient of the land; direct incineration: the oil sludge has a low solid content and cannot sustain spontaneous combustion The process needs to add auxiliary fuel

Oil sludge is a hazardous waste, and the disposal cost of the hazardous waste disposal center is relatively high, which increases the operating cost of the enterprise

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