Double-fluidized bed double-particle heavy and inferior fuel pyrolysis and gasification device and method

Abstract

The invention discloses a double-fluidized bed double-particle heavy and inferior fuel pyrolysis and gasification device and method. The device comprises a pyrolysis reactor system, a gasification reactor system, a pyrolysis oil recovery system and a particle circulation system; the pyrolysis reactor system completes feeding and a pyrolysis reaction of a heavy and inferior fuel; the gasification reactor system completes collection, recovery and gasification of char particles; the pyrolysis oil recovery system completes separation, purification and recovery of pyrolysis oil gas; and the particle circulation system completes recycle of fine particles subjected to gasification and regeneration. According to the device, a fluidized bed pyrolysis reactor and a fluidized bed gasification reactorare used as core reaction equipment, through action of carriers of two different particles of coarse particles and the fine particles, heat transfer, mass transfer and reactions in the reactors are enhanced, pyrolysis and gasification processes of the heavy and inferior fuel are efficiently coupled and integrated, resources are deeply utilized, and the conversion efficiency is high, so that the double-fluidized bed double-particle heavy and inferior fuel pyrolysis and gasification method is an economic and reasonable heavy and inferior fuel processing and utilization method.

Description

technical field [0001] The invention relates to the field of energy and chemical industry, in particular to a double-fluidized-bed double-particle heavy low-quality fuel pyrolysis gasification device and method. Background technique [0002] With the in-depth exploitation of global oil and gas resources, the trend of crude oil quality becoming inferior and heavy is obvious, and inferior and heavy crude oil will be the main trend of the world's crude oil changes. Heavy and inferior raw materials include heavy oil, oil sand bitumen, reduced residue, and coal tar The output of petrochemical and coal chemical primary and secondary processing products has increased sharply. The output of sour crude oil and high-sulfur crude oil has accounted for more than 75% of the total crude oil output, and the proportion of sulfur-containing and high-sulfur crude oil will further increase. At the same time, my country's oil refining industry is also facing the pressure of increasingly string...

AI Technical Summary

Problems solved by technology

Coking will convert a considerable part of heavy oil into coke, especially high-sulfur coke, which has serious processing and utilization problems. From the perspective of resource optimization and utilization, it is not the best choice; hydrogenation technology is the preferred technology in the future, but its investment and operating costs Higher; heavy oil catalytic cracking has always been valued by research institutions and enterprises, but if its raw materials are not subjected to hydrogenation pretreatment, they are directly used to produce gasoline and diesel components of National V, and the requirements for subsequent hydrogenation treatment are extremely stringent

Images