Microwave drum dry distiller and its application in dry distilling and pyrolyzing oil shale

Abstract

The present invention relates to carbon material pyrolyzing and dry distilling technology, and is especially one kind of microwave drum dry distiller and its application in dry distilling and pyrolyzing oil shale. The microwave drum dry distiller includes one microwave oven, and one inner screw drum on supporting rolls. The inner screw drum set on the microwave oven has material inlet, slag discharging barrel, gas exhausting pipe, and discharging port connected to the spiral conveyer. Granular oil shale entering to the microwave oven spirally through the inner screw drum absorbs microwave for dry distilling and pyrolysis so as to produce shale oil, fuel gas and semi-coke. The present invention has simple structure, convenient operation, fast dry distilling, high energy utilizing rate, environment friendship and other advantages.

Description

technical field [0001] The invention relates to the field of pyrolysis and dry distillation of carbonaceous materials, and relates to a microwave drum dry distillation device and its application as dry distillation of pyrolysis oil shale. Background technique [0002] There are huge oil shale resources in the world. According to incomplete statistics, there are about 10 trillion tons, which is 40% more than the 7 trillion tons of coal resources. According to the report of "World Energy Outlook" in 2002, the oil content of global oil shale is about 50% more than the traditional oil resources of 271 billion tons. my country's oil shale prospective reserves are about 2 trillion tons, equivalent to 80 billion tons of shale oil, ranking fourth in the world after the United States, Brazil and Estonia. The main components of oil shale are organic matter, mineral matter and water. The content of kerogen in oil shale is about 10-50%. In the case of isolating air or oxygen, it is he...

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Problems solved by technology

In order to improve the porosity of oil shale accumulation in the retort furnace and the uniformity of heating, the gas heat carrier method generally treats large-grained oil shale of 15-75mm, while small-grained oil shale below 15mm cannot be sent into the retort furnace Therefore, the energy consumption of this method is high, the process is complicated, and the utilization rate of oil shale is low; the solid heat carrier method is to burn the semi-coke after dry distillation or heat solid particles such as sand to a certain temperature It becomes a solid heat carrier and mixes with oil shale. During this contact process, the solid heat carrier transfers heat to oil shale through heat conduction and heats it to 450-600°C to realize oil shale carbonization.

Although this method mainly deals with oil shale with small particles below 25mm, its main disadvantage is that an additional solid particle heating furnace is required and the solid particles need to be sent into the carbonization furnace in the form of pneumatic conveying, so the device is complex and large, and the wear is serious , Short continuous running time, low energy utilization

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