Experimental device for solid-state fluidized mining crushing of natural gas hydrate, and experimental method thereof

Abstract

The invention discloses an experimental device for solid-state fluidized mining crushing of natural gas hydrate. The experimental device comprises a power liquid supply module, a hydrate suction module, a pipeline conveying module, a hydrate fluidized crushing module, a secondary machining module and an experimental data information collecting and processing module. An experimental method of the experimental device comprises the steps that the power liquid supply module, the hydrate suction module, the pipeline conveying module, the hydrate fluidized crushing module and the secondary machiningmodule are started; and the experimental data information collecting and processing module collects pressure and flow data at multiple positions. The experimental device for solid-state fluidized mining crushing of the natural gas hydrate, and the experimental method thereof have the beneficial effects that a flow-jet solid fluidized mining process is simulated, meanwhile, a plurality of pressureand flow detecting points and crushed sample sampling openings are formed, and thus parameter collecting is conducted conveniently; the parameters of the multiple parts are flexible and variable andcomprise change of the dragging-back speed of a movable sliding block, the shape parameters of jet flow nozzles and the power liquid pressure and flow rate; and the experimental device is simplified through the design of spraying heads, and thus the dynamic process of jet flow crushing can be observed from the side face of an experimental groove.

Description

technical field [0001] The present invention relates to a natural gas hydrate solid fluidized mining crushing experimental device and experimental method, in particular to a natural gas hydrate solid fluidized mining crushing and recovery separation method suitable for deep-sea non-diagenetic natural gas hydrate solid fluidized jet mining Crushing test device and test method. Background technique [0002] Natural gas hydrate is an alternative energy source with development potential, and its total amount is about twice that of other fossil energy sources combined. About 85% of the gas hydrate in the South my country Sea occurs in the shallow sediments of the deep seabed in the form of weak cementation (non-diagenetic). At present, natural gas hydrate production methods include injection method, depressurization method, chemical agent injection method and the combined application of the above methods. Decomposition to generate natural gas has the potential risk of causing g...

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Problems solved by technology

However, in the mining process, there are still some equipment design problems, process parameters and existing equipment optimization problems, such as the hydraulic parameters of the jet crushing device, the particle size distribution of hydrate particles after crushing, multi-phase transport equipment for hydrate particles, hydrate particle Secondary crushing and separation problems

[0004] At present, mechanical crushing has been adopted in the solid-state fluidization mining of natural gas hydrate, but there are two problems in this method: one is that the operation of crushing machinery on the seabed requires a large amount of energy to be transported from the ground to the seabed, which requires the laying of submarine power lines, and there are also The maintenance of mechanical equipment in the later stage; second, after the mechanical equipment crushes hydrate, a set of equipment is still required to transport the crushed hydrate mixed with seawater to the water surface, and the operation of multiple sets of equipment is complex and costly

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