Industrialization scale pyrolysis treatment system and method for oily sludge

Abstract

The invention belongs to the field of waste disposal in petroleum industry, and relates to an industrialization scale pyrolysis treatment system for oily sludge. The industrialization scale pyrolysis treatment system comprises a feeding pre-separation unit for performing secondary screening and solid-liquid separation on the oily sludge, a drying pyrolysis unit for performing drying and pyrolysis reaction on the oily sludge, a dust removal and condensation unit for performing dust removal and condensation on a pyrolysis gas mixture generated by the drying pyrolysis unit, and a discharge treatment unit which receives and treats separated substances of the other units respectively. Solid or solid-liquid mixed waste such as the oily sludge can be finally treated to achieve reduction, stabilization, harmlessness and recycling.

Description

technical field [0001] The invention belongs to the field of waste treatment in the petroleum industry, and relates to an oily sludge treatment system and method, in particular to a large-scale pyrolysis treatment system and method for oily sludge. Background technique [0002] Oily sludge is a kind of solid-liquid mixed waste rich in mineral oil (especially HW08 waste mineral oil) produced in the process of petroleum exploration, mining, storage, transportation and refining. Generally speaking, oily sludge Its appearance is black and viscous, and the oil-in-water, water-in-oil and suspended solid impurities are fully emulsified with each other to form a very stable suspension emulsion system. The longer the storage time, the more difficult it is to handle. Oily sludge is a highly dangerous pollutant, and many countries list it as a highly dangerous pollutant and give priority to controlling hazardous pollutants. [0003] At present, the treatment methods of oily sludge inc...

AI Technical Summary

Problems solved by technology

Rotary kiln incinerators have more rotating parts and slightly more maintenance. They have high mechanical technical requirements, low thermal efficiency, and higher technical conditions than pyrolysis incinerators. The dust concentration in the flue gas is high, accompanied by thermal NOx, especially Crude oil in oily sludge cannot be recycled and cannot meet the large-scale treatment capacity

The chain plate conveyor belt cracking furnace has sludge residues falling off when the chain plate goes down, and the lower cylinder wall is easy to coke, which will cause local overheating of the furnace body, and there are many moving parts inside the chain plate conveyor belt cracking furnace, which requires high processing and manufacturing , the equipment often goes wrong

The whole set of horizontal screw-propelled cracking furnace has a simple structure. The friction between the screw itself and the inner wall can scrape off the coke on the wall, which solves the problem of coking. Due to the short residence time of oily sludge in the furnace, it directly affects the scale and total amount of treated sludge and the problem that the harmless treatment index cannot be achieved.

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