Coal hydrogasification system and method thereof

Abstract

The invention relates to a coal hydrogasification system and a method thereof. The coal hydrogasification system comprises a hydrogen combustion furnace and a nozzle structure, the hydrogen combustionfurnace is used for enabling hydrogen and oxygen to be subjected to a combustion reaction in the hydrogen combustion furnace so as to heat the hydrogen to a preset temperature; the nozzle structure comprises a hydrogen distribution cavity and at least one pulverized coal pipeline, the hydrogen distribution cavity is communicated with the hydrogen combustion furnace, at least two hydrogen jet flowopenings are formed in the cavity wall of the hydrogen distribution cavity, and the hydrogen jet flow openings are used for jetting hydrogen heated to the preset temperature into the gasification furnace; the pulverized coal pipeline is arranged in the hydrogen distribution cavity in a penetrating mode and does not communicate with the hydrogen distribution cavity, a coal inlet of the pulverizedcoal pipeline extends to the exterior of the hydrogen distribution cavity, a coal outlet of the pulverized coal pipeline communicates with an inner cavity of the gasification furnace and is used for spraying pulverized coal into the gasification furnace, and the hydrogen jet flow opening is obliquely formed in the axis direction of the coal outlet; therefore, the hydrogen can be directly heated tothe reaction temperature, and the mixing effect of the pulverized coal and the hydrogen is improved.

Description

technical field [0001] The present disclosure relates to the technical field of coal hydrogenation gasification, in particular to a coal hydrogenation gasification system and method. Background technique [0002] Coal hydrogasification is a process in which pulverized coal reacts with high-temperature and high-pressure hydrogen to undergo hydrocracking and hydrogasification to generate crude gas rich in methane, and to produce light coal tar and semi-coke. [0003] When coal hydrogasification is carried out, the hydrogen needs to be heated first, and the hydrogen is heated to the reaction temperature, and then the hydrogen reacts with the coal powder. The existing technology mainly heats the hydrogen indirectly through the hydrogen heating furnace. The hydrogen heating furnace heats the hydrogen through the heat exchange of the metal coil. heating. [0004] However, because the metal coil is limited by the high temperature, the hydrogen cannot reach the reaction temperatur...

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Problems solved by technology

[0004] However, because the metal coil is limited by the high temperature, the hydrogen cannot reach the reaction temperature through indirect heat exchange. Therefore, in the prior art, after using the hydrogen heating furnace to indirectly heat the hydrogen, the hydrogen needs to be heated twice through other devices, resulting in The entire hydrogasification process is complicated; at the same time, in the existing gasifier, the mixing effect of pulverized coal and hydrogen is poor, which affects the gasification efficiency

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