Oil sand harmless resource treatment method and special device

Abstract

The invention discloses a harmless recycling treatment method and special device for oil sand. The treatment method comprises the following steps: dehydrating the oil sand through residual heat, isolating air for vacuum feeding, discharging powdery solid residues at a high temperature by a dry method, and pyrolyzing the oil sand to generate three phases of gas, liquid and solid. According to the harmless recycling treatment method and the special device, disclosed by the invention, a chemical pyrolysis treatment method is adopted, a reaction kettle is used for pyrolyzing the oil sand, the disadvantages inthe prior art are overcome, and the treatment process is continuous and automated; a certain kind of the oil sand can be treated, and composite waste oil sand can also be treated; the resultant of the treated oil sand, namely fluid oil has very a low wax content, so that the fluid oil is conveniently used as fuel or petroleum raw materials; gases are combustible gases which flow back to be used as the fuel; sewage which is treated reaches a set standard and flows back to be used as cooling water or boiler water; solid waste residue is coke powder and calorific value phase lignite which are smokeless, and is used as boiler fuel for personally dehydrating water vapor and steam of a steam pump.

Description

technical field [0001] The invention relates to a special device for the harmless and resourceful treatment method of oil sand. Background technique [0002] The oil composition of oil sands is consistent with that of crude oil, and a large amount is the asphaltene oil left over from oil extraction; waste water, mud sand, and plastics and rubber used in oil extraction. The oil sand 1 referred to refers to the oily waste at the oil extraction site, including oily mud sand, oily contaminated plastic, and rubber waste mixture. 2 is the oily deposits and other oily waste at the bottom of the oil storage tank. 3 is a natural oil sand mine. [0003] Oil sands have a great impact on the environment, emitting polluting gases, polluting groundwater and land. Oil sands were not treated thoroughly during the oil production process, and oil sand deposits were a major source of environmental pollution and a source of safety hazards. [0004] The following technologies are generally u...

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Problems solved by technology

[0005] At present, there are some problems in the test or application of several technologies, and some problems cannot be overcome and cannot be applied: for example, fixed kettles and fluidized beds are used for chemical pyrolysis, secondary reactions often occur in pyrolysis, coking of solid products, intermittent cleaning Coke and cannot run continuously; incineration treatment increases waste gas emissions, wastes resources and increases waste gas emissions, and is not suitable for promotion; the product uses steam pump wet flow, which consumes a lot of energy and has a large amount of sewage; some do not use catalysts, oil sands The resulting liquid oil has a higher wax content, and the residual volatile content of the solid residue is higher; the biological treatment cycle is long; the steam deoiling method has a higher residual oil content in the solid residue

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