Piston type fluidized bed low temperature dry distillation technological process

Abstract

The invention relates to a process method for low temperature carbonization on a fluidized bed. The process method uses the principle of a lift pipe fluid catalytic cracker, uses a lift pipe reactor of the lift pipe fluid catalytic cracker as a carbonization reactor, uses a catalyst regenerator of the lift pipe fluid catalytic cracker as a high-temperature water gas generator, and uses high-temperature water gas as a fluidizing medium and a heat carrier of a carbonization raw material. The carbonization method comprises the following steps that: a carbonizing raw material is conveyed to the lift pipe fluidized bed reactor for a carbonization reaction of the raw material; the reacted oil and gas are separated to produce a carbonized product; carbonized carbocoal enters the water gas regenerator; carbon in the carbonized carbocoal, oxygen and water vapour in air are subjected to oxidation reaction and water gas reaction; the water gas obtained in the reaction is used as the fluidizing medium and the heat carrier during the carbonization process; and solid clinkers produced after the carbonized carbocoal is subjected to the water gas reaction are discharged. Compared with the prior art, the method has the advantages of simple process, high production capacity, less equipment and so on, and can be used in oil shale, oil sand, coal and other substances to produce liquid petroleum products.

Description

technical field [0001] The present invention relates to an energy chemical technology, in particular to a low-temperature dry distillation process technology, in particular to a piston-type fluidized bed low-temperature dry distillation process for oil shale, oil sand, peat, coal and other solid minerals. Background technique [0002] With the worldwide economic development, the worldwide consumption of petroleum continues to grow, resulting in increasingly tight supply of petroleum, rising petroleum prices, and energy security has become a global issue. Especially in China, due to the rapid development of the economy, the consumption of oil has grown rapidly, but the domestic crude oil production is far from keeping up with the growth rate of demand, resulting in a rapid increase in crude oil imports year by year. In 2007, China's crude oil and refined oil imports exceeded 180 million Ton, foreign dependence reached 47%, close to the warning line of 50%, has seriously threat...

AI Technical Summary

Problems solved by technology

[0007] Disadvantages of Fushun type retort furnace: 1) The diameter of the oil shale block entering the furnace is 12-75mm, and the utilization rate of oil shale is only 80%, and the oil shale <12mm is discarded; 2) The discarded oil shale occupies a large amount of land, polluting 3) The oil recovery rate is as low as 60-65%; 4) The processing capacity of a single furnace is small, and the production capacity is low; 5) The calorific value of gas is low; 6) Direct water washing, large water consumption, and high sewage treatment costs

The main disadvantage of this method is that the system is complex, not only including two fluidized bed reactors and supporting related equipment, but also need to set up a high-temperature flue gas energy recovery system and a heating system for hot carrier gas, etc. These systems are all installed in a high-temperature environment Work system, high investment and operating costs

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