Method for oil shale integral utilization

Abstract

The comprehensive optimized oil shale utilizing method includes crushing and sieving oil shale ore, dry distilling the 8-80 mm size component in retort furnace to produce shale oil and fuel gas, crushing the semicoke waste into 8 mm below size, mixing the crushed semicoke waste and 8 mm below size waste grain from oil refining to form mixed fuel for the circulating fluidized bed boiler, using the produced steam partially for externally supplying and partially to drive turbine generator, and using the cinder in producing cement, haydite and building block. The present invention provides one new way for comprehensive utilization of giant oil shale resource.

Description

technical field [0001] The invention relates to a method for comprehensive utilization of oil shale, which can realize all-round comprehensive utilization of oil shale resources in oil production, power generation, heat supply and building materials, and belongs to the technical field of oil shale resource utilization. Background technique [0002] Oil shale is an important potential energy source with huge reserves. Among fossil fuels, its reserves are converted into calorific value and rank second only to coal. If it is converted into shale oil, the world's oil shale reserves are about 475 billion tons, equivalent to 5.4 times the proven recoverable reserves of natural crude oil in the world. The development and application of oil shale has a history of more than 200 years, and the development and utilization of oil shale energy mainly lies in the production of shale oil. The refining process of shale oil usually adopts the dry distillation method, that is, the oil shale ...

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Problems solved by technology

However, due to problems such as coking in the furnace, serious metal corrosion on the radiation heating surface, dust on the convection heating area, large heat loss from mechanical incomplete combustion, and difficulty in burning low calorific value oil shale, it is difficult to develop

The bubbling fluidized bed combustion of oil shale (boiling layer process. China Industry Press, 1965, pp. 175-214) has realized the low-temperature combustion of oil shale, and effectively solved the problem of oil shale in bed-burning furnace and chamber-burning furnace. Coking in the furnace caused by rock combustion, severe metal corrosion on the radiation heating surface, ash on the convective heating area, difficulty in burning low calorific value oil shale, etc., but there are problems such as high carbon content in fly ash and difficulty in large-scale

Oil shale circulating fluidized bed combustion solves the problems exposed by oil shale in the combustion process of layer combustion furnace, chamber combustion furnace and bubbling fluidized bed, and is an effective way of oil shale combustion and utilization (65t / h demonstration Oil shale circulating fluidized bed power plant boiler operation practice. Chinese Journal of Electrical Engineering, 2001, No. 2, pp. 69-73), but the problem is that the optimized, reasonable, economical and efficient utilization of oil shale resources has not been realized

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