Gas-solid combined type heat-carrying oil shale fluidized bed dry distilling system

Abstract

The invention relates to a gas-solid combined type heat-carrying oil shale fluidized bed dry distilling system. The bottom of the fluidized bed dry distilling furnace of the fluidized bed dry distilling system is divided into high temperature and low temperature dry distilling chambers; heat-carrying modes that the gas functions primarily and the hot ash functions secondarily and the hot ash functions primarily and the gas functions secondarily are adopted; the dry distilling time of the oil shale is prolonged effectively; the shale oil is prevented from secondary cracking because of over-high dry distilling temperature; the efficient, clean and economic utilization of the oil shale resource is realized; and the system is applicable to the comprehensive utilization technology of the oil shale. Compared with the prior art, the technology can improve the qualities of the shale oil and the gas; the integration of the oil shale fluidized bed dry distilling furnace and a half-cock circulation fluidized bed shale ash circulation loop is realized; the complexity of the system is reduced effectively; the energy loss and environment pollution during the process are reduced; and the operation security of the system is improved.

Description

Technical field [0001] The invention belongs to the technical field of oil shale resource utilization, and relates to an oil shale fluidized bed dry distillation system, in particular to a hot ash and circulating hot gas generated by burning semi-coke in a circulating fluidized bed as an oil shale dry distillation furnace The gas-solid combined heat-carrying oil shale fluidized bed dry distillation system of heat carrier is suitable for comprehensive utilization technology of oil shale, and can realize the efficient, clean and economic utilization of oil shale resources. Background technique [0002] Oil shale is an important potential energy source. Shale oil similar to natural petroleum can be obtained by low-temperature dry distillation. Among fossil fuels, its reserves are converted into calorific value, second only to coal. If converted into shale oil, the world's shale oil reserves are about 400 billion tons, which is equivalent to the current world oil reserves. my country...

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Problems solved by technology

[0003] The development and utilization of oil shale has a history of more than 200 years. The main utilization methods are refining shale oil and direct combustion for power generation and heat supply. This single product utilization form has low resource utilization rate, immature technology, serious environmental pollution, Some problems, such as poor ability to resist the impact of market economy, make it difficult to sustain development

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