High-temperature treatment process for oily sludge

Abstract

The invention discloses a high-temperature treatment process for oily sludge. According to the technical scheme, the process comprises the following steps: 1) a feeding step, namely a step of feedingmaterials into a rotary kiln by utilizing a belt conveyor and a double-screw conveyor; 2) a step of high-temperature treatment in the rotary kiln, namely a step of allowing the material entering the rotary kiln to slowly move to the tail part of the rotary kiln along with the rotation of a cylinder with the gradient, so that the whole process of drying, organic matter desorption and thermal stabilization is completed; (3) a step of treatment in a secondary combustion chamber, namely a step of discharging the material subjected to high-temperature treatment from the kiln tail, cooling the material through an outer jacket, enabling the cooled material to fall into a soil discharging machine for outward transportation, and performing combustion treatment on organic and heavy metal substancesseparated out after high-temperature pyrolysis in an aerosol form along with flue gas in a kiln head and a kiln body secondary combustion chamber; 4) a step of flue gas filtration for dust removal; and 5) a step of a step of flue gas spraying and discharging. According to the scheme, pollutants are thoroughly oxidized and decomposed, it can be guaranteed that the emission value of the pollutants such as dust, sulfur dioxide and dioxin reaches the emission standard, and economic benefits are good.

Description

Technical field [0001] The invention relates to the technical field of sludge treatment, in particular to a high-temperature treatment process for oily sludge. Background technique [0002] Oily sludge is a general term for the solid / semi-solid mixture containing petroleum pollutants produced in the process of oil extraction, transportation and smelting. According to its source, oily sludge can be divided into three categories: Drill cuttings sludge: In the process of oil well exploitation, when water-based and oil-based drilling mud are used, the mixture that is taken out of the drilling as the drilling mud mainly contains water, Oil, inorganic ash and some heavy metal elements of drill cuttings. Wellsite sludge: After oil is extracted from drilling, it is a mixture of oil content produced during the process of transportation and pretreatment at the wellsite. Refining sludge: a mixture containing petroleum substances produced during the process of smelting, refining, filtering,...

AI Technical Summary

Problems solved by technology

This method uses the principle of physical evaporation and does not involve the oxidative decomposition of organic matter. Although it can separate pollutants, it is only a transfer process and the disposal is not thorough; a stable heat source is required, so the energy consumption is large and the cost is high; and in the process of operation May produce secondary pollution of dust and smoke

Images