A pulverized coal hydrogenation gasification method and system
A technology for hydrogenation, gasification and pulverized coal, which is used in the manufacture of combustible gas, petroleum industry, etc., can solve the problems of low carbon conversion efficiency and energy utilization efficiency, and has not been effectively utilized, and achieves the effect of improving yield
Active Publication Date: 2020-07-14
ENN SCI & TECH DEV
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Problems solved by technology
In the prior art, semi-coke is usually discharged directly, and the carbon and sensible heat in it are not effectively utilized, which makes the carbon conversion efficiency and energy utilization efficiency in the hydrogasification process low. On the other hand, the hydrogasification process needs to use A large amount of hydrogen needs to find a stable gas source to provide the foundation and guarantee for the stable operation of industrial plants
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[0030] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0031] An embodiment of the present invention provides a pulverized coal hydrogasification method, the pulverized coal hydrogasification method includes the following steps:
[0032] Step S1, making the pulverized coal and hydrogen undergo a hydrogasification reaction to generate semi-coke;
[0033] Step S2, causing the semi-coke and steam to undergo a chemical chain gasification reaction in the presence of an absorbent; wherein, the semi-coke and the absorben...
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Abstract
An embodiment of the invention provides a pulverized coal hydro-gasification method and system, and relates to the field of fuel processing. According to the method and the system, carbon conversion efficiency and energy utilization efficiency can be effectively improved in the hydro-gasification process, and hydrogen sources can be achieved in the hydro-gasification process. The pulverized coal hydro-gasification method includes the steps: performing hydro-gasification reaction on pulverized coal and hydrogen to generate semi-coke; performing chemical chain gasification reaction on the semi-coke and steam in the presence of an absorbing agent. The semi-coke and the absorbing agent are layered in a fluidized state, the semi-coke and the steam react on the lower layer to generate a gas product, the gas product comprises acid gas, hydrogen and methane, the absorbing agent absorbs the acid gas on the upper layer, the particle diameter of the absorbing agent is smaller than that of the semi-coke, the hydrogen is separated from the gas product and then provided for the hydro-gasification reaction. The pulverized coal hydro-gasification system is used for hydro-gasification reaction of pulverized coal.
Description
technical field [0001] The invention relates to the field of fuel processing, in particular to a pulverized coal hydrogasification method and system. Background technique [0002] The basic characteristic of my country's energy structure is "rich in coal, poor in oil and little in gas". Using coal as raw material to produce various chemicals and fuels, especially coal-based high-calorific-value gas, is worthy of research and attention in terms of energy security, economic benefits, and ecological environmental protection. Traditional coal-to-natural gas technology usually includes high-temperature coal gasification (above 1000°C), water-gas shift, low-temperature methanol washing, and methanation. The process of this technology requires continuous heating and cooling, which requires large investment and low energy efficiency. [0003] In order to realize the graded and efficient utilization of coal resources, the academic community has proposed the process idea of "coal t...
Claims
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IPC IPC(8): C10J3/66
CPCC10J3/66
Inventor 贾则琨曾亮周三汪国庆李克忠
Owner ENN SCI & TECH DEV