A coal gasification method and system
A technology of coal gasification and gas flow, applied in the field of coal chemical industry, can solve the problems of large consumption of oxygen carrier, increased cost of coal gasification, high preparation cost, etc.
Active Publication Date: 2020-12-29
ENN SCI & TECH DEV
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Problems solved by technology
Although the artificially prepared oxygen carrier meets the requirements of oxygen carrying capacity and mechanical strength, the preparation cost is high, resulting in high cost of coal gasification; while the natural oxygen carrier is low in cost, but its mechanical strength is low, which causes In the process of coal gasification, the consumption of oxygen carrier is relatively large, which indirectly increases the cost of coal gasification
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[0045] In order to make the above objects, features and advantages of the present invention more obvious and understandable, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Apparently, the described embodiments are only some of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.
[0046] Embodiments of the present invention provide a coal gasification method, such as Figure 1 ~ Figure 3 As shown, the coal gasification method comprises the following steps:
[0047] Step S1: placing the ilmenite ore in the oxidation reactor 1, passing through an oxygen-containing gas to cause an oxidation reaction of the ilmenite ore to o...
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Abstract
The invention provides a coal gasification method and a coal gasification system, and relates to the technical field of coal chemical industry. Oxygen is supplied to a coal gasification process, meanwhile, a product containing zero-valent iron and a titanium-containing substance is obtained, and the coal gasification cost is reduced. The coal gasification method comprises the following steps: placing a titanic iron ore in an oxidation reactor, and introducing an oxygen-containing gas to perform oxidation reaction on the titanic iron ore to obtain an oxygen-supported titanic iron ore; placing the oxygen-supported titanic iron ore and raw coal in a reduction reactor, providing oxygen by the oxygen-supported titanic iron ore to perform coal gasification reaction on the raw coal, and performing reduction reaction on the oxygen-supported titanic iron ore to generate zero-valent iron; bringing out a part of product in the reduction reactor by use of an airflow, and separating the product brought out by the airflow to obtain a combustible gas, the zero-valent iron and the titanium-containing substance; causing the left product to return to the oxidation reactor to support oxygen again forcoal gasification reaction in the reduction reactor. The coal gasification method and the coal gasification system are applied to the field of coal gasification by use of chemical looping gasification reaction.
Description
technical field [0001] The invention relates to the technical field of coal chemical industry, in particular to a coal gasification method and system. Background technique [0002] Chemical looping gasification reaction is a kind of coal gasification method. Its basic principle is to decompose the traditional gasification process of direct contact reaction between fuel and air into two gas-solid reactions with the help of oxygen carrier: air reaction and fuel reaction. gasification reaction. During the reaction, the fuel and the air do not need to be in contact, and the oxygen in the air is transferred to the fuel by the oxygen carrier. [0003] In the coal chemical looping gasification reaction, the coal is not directly in contact with the air in the gasifier, and water vapor is used as the gasification medium, and the oxygen and heat are realized through the circulation of the oxygen carrier between the air reactor and the gasification reactor. transfer to complete the n...
Claims
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IPC IPC(8): C10J3/20C10J3/84C21B13/00
CPCC10J3/20C10J3/84C10J2300/1625C21B13/006C21B13/0073
Inventor 李海冰曾亮贾则琨李克忠
Owner ENN SCI & TECH DEV