Double-layer temperature control system for hydrate sediment long core composition and decomposition

Abstract

The invention discloses a double-layer temperature control system for hydrate sediment long core composition and decomposition. The double-layer temperature control system for hydrate sediment long core composition and decomposition comprises a pressure chamber and a cooling system, a spacer layer is arranged inside the pressure chamber, a sediment layer and a composition temperature control layer are arranged inside the pressure chamber, an inlet end and an outlet end are respectively arranged on two sides of the sediment layer, the composition temperature control layer is placed outside the sediment layer and is tightly contacted with the sediment layer, and the composition temperature control layer comprises an inner temperature control layer and an outer temperature control layer. The cooling system comprises a first cooling system and a second cooling system, wherein the first cooling system is connected with the inner temperature control layer, the second cooling system is connected with the outer temperature control, the flow direction of cooling liquid in the inner temperature control layer is opposite to the flow direction of air in the sediment layer, and the flow direction of cooling liquid in the outer temperature control layer is the same with the flow direction of air in the sediment layer. According to the double-layer temperature control system for hydrate sediment long core composition and decomposition, the hydrate sediment long core can be fast and evenly composited in composition process, and constant environment temperature is provided for decomposition.

Description

technical field [0001] The invention relates to a double-layer temperature control system, in particular to a double-layer temperature control system for the synthesis and decomposition of hydrate sediment long cores. Background technique [0002] Gas hydrate is an ice-like solid compound formed by natural gas and water under high pressure and low temperature conditions. Hydrate deposits are widely distributed in terrestrial permafrost environments and deep-water formation environments such as oceans and lakes. my country has obtained hydrate sediment samples from the northern slopes of the South China Sea and the permafrost areas of the Qilian Mountains, which proves that hydrates are a strategic energy source with great mining potential in my country. [0003] Hydrate mining requires temperature rise or depressurization disturbance to decompose hydrate in soil / rock sediments into phase change to produce gas, which causes engineering science problems of multi-field, multi-...

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Problems solved by technology

[0005] The present invention aims at the difficulties of uneven synthesis and long cycle of hydrate sediment long core in the indoor hydrate mining simulation of the prior art, and the different requirements of hydrate sediment synthesis and decomposition on the temperature environment, and proposes a hydrate deposition method. A double-layer temperature control system for long core synthesis and decomposition to solve the problem of difficult synthesis of hydrate sediment long cores required for indoor hydrate mining simulation

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