Air-oil co-production device and method adopting fluidized bed pulverized coal gasification and solid heat carrier pyrolysis coupling

Abstract

The invention relates to an air-oil co-production device and method adopting fluidized bed pulverized coal gasification and solid heat carrier pyrolysis coupling. The high-temperature circulating semicoke of a fluidized bed pulverized coal gasifier adopts two-loop control, one loop enters a pyrolysis reactor to be used as heat carrier for performing pyrolysis with coal and forming semicoke, the formed semicoke enters the fluidized bed pulverized coal gasifier; and the other loop directly returns to the return fluidized bed pulverized coal gasifier. The invention is based on the fluidized bed pulverized coal gasification technology, uses the high-temperature circulating semicoke as heat carrier to pyrolyze raw material and generate pyrolysis coal gas and tar before sending raw material to the coal furnace; and the semicoke generated through pyrolysis returns the fluidized bed pulverized coal gasifier for further burning and gasifying, thus raw gas can be produced and air-oil co-production can be realized. The problems such as low process heat efficiency of the traditional solid heat carrier can be overcome, thus the method of the invention is better than the traditional solid heat carrier technology.

Description

technical field [0001] The invention relates to a gas-oil co-production device and method, in particular to a gas-oil co-production device and method coupled with fluidized bed pulverized coal gasification and solid heat carrier thermal decomposition. Background technique [0002] With the rapid development of the national economy, my country's oil consumption has grown rapidly. Petroleum is a national strategic security material, and my country is relatively short of petroleum resources. In order to reduce dependence on imported petroleum, my country is implementing a diversified energy strategy. The development of clean coal technology is one of the countermeasures to implement the national energy diversification strategy. Among them, pulverized coal pyrolysis technology is a clean coal technology with certain competitiveness because of its relatively simple method and low investment. [0003] Typical coal pyrolysis processes at home and abroad include: external heating ...

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Problems solved by technology

[0005] The purpose of the present invention is to solve the problems of low process thermal efficiency in the traditional solid heat carrier pyrolysis process, and use high-temperature circulating semi-coke in a fluidized bed pulverized coal gasifier as a heat carrier to rapidly pyrolyze coal to produce high-quality low-temperature coal tar The gas-oil co-production device and method of fluidized bed pulverized coal gasification and solid heat carrier pyrolysis coupling, the crude gas, pyrolysis gas and tar produced by the present invention can be matched with projects such as coal tar hydrogenation

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