Gas-solid mixed heating powdered oil shale destructive distillation apparatus

Abstract

The invention relates to a gas-solid mixed heating powdered oil shale destruvtive distillation apparatus. The gas-solid mixed heating powdered oil shale destruvtive distillation apparatus comprises anair distribution chamber shell and a reaction chamber shell, and is characterized in that the central position of the air distribution chamber shell is provided with the reaction chamber shell, a reaction chamber is arranged in the reaction chamber shell, a material inlet pipe and an air outlet pipe arranged on the top of the reaction chamber are respectively communicated with the reaction chamber, a plurality of baffle plates are cross arranged on the inner wall of the reaction chamber, a material outlet is formed in the lower portion of the reaction chamber, a plurality of air distributionpipes are cross arranged on the reaction chamber in parallel, a cavity between the air distribution chamber shell and the reaction chamber shell is an air distribution chamber, two ends of the plurality of air distribution pipes are communicated with the air distribution chamber, and an air inlet communicated with the air distribution chamber is formed in the air distribution chamber shell. Hot shale ash is enabled to exchange heat with powdered oil shale in the reaction chamber by utilizing hot smoke sucked from the air distribution chamber, so that the destruvtive distillation problem of thepowdered oil shale is solved, the destruvtive distillation quality of the powdered oil shale is ensured, the destructive distillation efficiency is increased, the production cost is decreased, and the prospect for realizing the commercialized production is wide.

Description

technical field [0001] The invention relates to an oil shale dry distillation device, in particular to a gas-solid mixed heating powder oil shale dry distillation device. Background technique [0002] Oil shale is a kind of sedimentary rock rich in kerogen. Oil shale is isolated from air and heated to about 500°C. The kerogen is pyrolyzed into shale oil. This process is called oil shale dry distillation, which produces semi-coke and shale oil and gas. . The world is rich in oil shale resources, and its reserves converted into shale oil are as high as more than 400 billion tons. my country's oil shale resources are predicted to reach 719.9 billion tons, which is 47.6 billion tons converted into shale oil. It has not yet been exploited on a large scale. As an alternative resource for primary conventional energy such as coal. [0003] The domestic oil shale carbonization device is a vertical gas heat carrier carbonization furnace represented by the Fushun furnace. The semi-tar...

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Problems solved by technology

[0007] In the authorized invention patent "A high-efficiency internal heating powder shale oil extraction device and its method" (ZL201110067655.7), the middle section of the retort device uses a multi-layer gas distributor to transport hot gas to provide heat for retort , but because of the air inlet on one side and the semi-closed honeycomb structure adopted in the air distribution position of this gas distributor, the gas flow rate on the side near the air inlet of each layer is much larger than that on the other side, resulting in the retort section The internal gas flow state is chaotic, which is not conducive to the control and uniformity of particle residence time during the dry distillation process

[0008] The relatively complete powdery oil shale retort technology in China mainly includes Maoming powder shale fluidized retort process and Shanghai Boshen fluidized retort process, but it has not yet been put into large-scale commercial production due to problems such as difficulty in large-scale expansion and insufficient economic benefits

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