Underground combustion heater for in-situ heating of underground mineral resources
A technology for burning heaters and mineral resources. It is applied in wellbore/well components, mining fluids, earthwork drilling and mining, etc. It can solve problems such as insufficient heat exchange, reduced gas utilization efficiency, and gas that cannot reach the reaction temperature. The effect of improving conversion rate and improving utilization efficiency
Active Publication Date: 2021-09-17
JILIN UNIV
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However, this method must ensure that the temperature of the aluminum foam that supports the catalyst is always maintained at about 500°C to ensure that the hydrocarbon gas can react; Insufficient heat exchange of aluminum causes part of the gas to fail to reach the reaction temperature, thereby reducing the utilization efficiency of the gas
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[0020] In order to make the purpose, features, and advantages of the present invention more obvious and understandable, the technical solutions in the present invention are clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the present invention is not limited by the following examples, and the specific implementation manner can be determined according to the technical solutions of the present invention and actual conditions. In order to avoid confusing the essence of the present invention, known methods, processes, processes, components and circuits are not described in detail; "first" and "second" used in the present invention do not represent any order, quantity or importance, but It is only used to distinguish different components. .
[0021] like figure 1 , figure 2 and image 3 As shown, a downhole combustion heater for in-situ heating of underground mineral resources is suitable for downho...
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The invention discloses an underground combustion heater for in-situ heating of underground mineral resources, and belongs to the technical field of in-situ heating exploitation. The underground combustion heater comprises a gas injection system, a combustion system and a tail gas backflow preheating system; the gas injection system is used for ensuring that gas and combustion air are fully mixed to form mixed gas, and then the mixed gas is injected into the combustion heater; the combustion system comprises a combustion cavity pipe, a baffle plate, an ignition needle support, an ignition needle, porous foamed aluminum and a combustion cavity lower end cover; and as for the tail gas backflow preheating system, on one hand, backflow of high-temperature tail gas can exchange heat with the porous foamed aluminum through the combustion cavity pipe, so that the temperature of the porous foamed aluminum is guaranteed, and on the other hand, backflow of the high-temperature tail gas and the mixed gas injected into the combustion heater can exchange heat through the combustion cavity pipe, so that the mixed gas is preheated to improve the combustion efficiency of the gas. According to the underground combustion heater, the porous foamed aluminum loaded with a catalyst can be continuously heated, and the fuel gas injected into the combustion heater is preheated, so that the catalytic combustion efficiency of the fuel gas is improved.
Description
technical field [0001] The invention belongs to the technical field of in-situ heating and mining, and in particular relates to an underground combustion heater for in-situ heating of underground mineral resources. Background technique [0002] Unconventional oil and gas resources such as oil shale, heavy oil, tight oil, and natural gas hydrate are important strategic resources. Unconventional oil and gas resources such as oil shale, heavy oil, tight oil, and natural gas hydrate can be realized through downhole in-situ heating. Mining is considered the most efficient method. [0003] It is an effective downhole in-situ heating method to inject the high-temperature tail gas generated by hydrocarbon gas combustion into underground to heat the target formation. In this method, the combustion gas and the supporting gas are respectively fed to the heater at the bottom of the well through a supercharger on the surface, and the two gases are combusted in the combustion chamber of ...
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IPC IPC(8): E21B43/243E21B41/00
CPCE21B43/243E21B41/00
Inventor 贾瑞王秋雯张楠
Owner JILIN UNIV