Linkage screw return type oil sand dry distillation process system

Abstract

The invention relates to a linkage spiral return stroke type oil sand dry distillation system which comprises a raw material drying unit, a pyrolysis dry distillation unit, a heat storing rotational flow hot air unit, a condensation separating unit and a tailing cooling unit and is characterized in that a linkage spiral three-return stroke dry distillation device which comprises a heating box and a plurality of groups of three-return stroke screw conveyors arranged in the heating box is used as the pyrolysis dry distillation unit; each three-return stroke screw conveyor comprises a preheating screw conveyor, a pyrolysis screw conveyor and a dry distillation screw conveyor which are communicated end to end and vertically arranged from top to bottom, wherein hot air guide clapboards are respectively arranged between the preheating screw conveyor and the pyrolysis screw conveyor and between the pyrolysis crew conveyor and the dry distillation screw conveyor; an upper hot air heat transfer channel, an intermediate hot air heat transfer channel and a lower hot air heat transfer channel which are communicated end to end are arranged in the heating box; an air inlet and an air outlet are respectively formed in the upper surface and lower surface of the shell of the heating box, and high-temperature hot air of a heating meson is provided by the heat storing rotational flow hot air unit. The system is reliable in operation, and can be used for stably and thoroughly separating gases, solids and liquids.

Description

technical field [0001] The invention relates to a material dry distillation comprehensive utilization technology, in particular to a linkage spiral return type oil sand dry distillation process system. Background technique [0002] With the continuous growth of the global energy market, especially the huge increase in the market demand for petroleum products, the development of new energy technology products for petroleum substitutes has become a major research topic for countries all over the world. At present, domestic and foreign oil sand extraction technologies mainly include hot alkaline water method, solvent extraction method, and pyrolysis dry distillation method. The first two processes are rarely used in industrial production due to the limitations of the technology itself. Developed countries in the world have developed and researched oil sands dry distillation technology to varying degrees. The United States, Canada, Brazil, Germany, Japan and other countries hav...

AI Technical Summary

Problems solved by technology

Other processes are rarely used in the oil shale retort separation industry, and are in the industrial test stage in the oil sand retort separation industry

However, the existing problems in the application of the current oil sand dry distillation separation technology are as follows: 1. The oxidation and combustion process in the furnace is difficult to control when using the direct combustion heat exchange dry distillation process, the separation and recovery rate of raw material oil and gas is low, the process is complicated, the energy consumption is high, and the pollution 2. Using external heat rotary kiln dry distillation technology, the material rolls forward in the kiln, and the hot flue gas moves forward around the outer cylinder of the kiln. The hot meson flue gas and the heated material are inseparable Contact heat exchange, limited by the wall area of ​​the heat exchange cylinder, makes the heat exchange efficiency of the material in the cylinder low, uneven heating, and the phenomenon of material sticking to the wall often occurs; the thermal decomposition speed of the material is slow, and the production capacity of a single device is low; heating meson It is hot flue gas, and when it is running on the outer wall of the kiln, it will pollute and scale the outer wall, increase thermal resistance, and reduce heat transfer efficiency; at the same time, the flue gas will condense on the outer wall of the material inlet side to form acidification corrosion.

To sum up, the current technology of dry distillation and separation of oil sands is still in the growth stage of industrial trials and cannot meet the requirements of modern industrial production.

Images