Supplementary combustion chamber of supercritical pressure gas-liquid fuel generator

Abstract

The invention provides a supplementary combustion chamber of a supercritical pressure gas-liquid fuel generator, and relates to oil extraction equipment in an oil field. The supplementary combustion chamber is characterized by comprising a pre-combustion chamber (6), a secondary combustion chamber (10) and a vaporizing chamber (14). A spouting mode of fuel of the supplementary combustion chamber is as follows: the pre-combustion chamber (6) only sprays part of the fuel and full air for oxygen-enriched combustion; the remaining fuel is sprayed into the secondary combustion chamber (10) from a supplementary combustion inspirator and completely combusted with oxygen-enriched gas from the pre-combustion chamber in the secondary combustion chamber (10). By the combustion chamber, simultaneous combustion of gas fuel and liquid fuel is realized, and heat transfer deterioration is prevented due to various cooling modes.

Description

technical field [0001] The invention relates to an oil production equipment in an oil field, in particular to a supplementary combustion type combustion chamber of a steam injection generator (also known as a composite heat carrier generator) for a supercritical pressure fueled natural gas oil field steam injection generator. Background technique [0002] With the deepening of my country's oilfield development work, some major oilfields in my country have entered the "tertiary oil recovery" stage. According to the statistics available, the reserves of oil reservoirs suitable for the application of "tertiary oil recovery" technology in my country have reached more than several billion tons. Obviously, increasing the recovery rate of an existing oil field by just one percent has the effect of discovering another large oil field. Therefore, the development of "tertiary oil recovery" technology and the improvement of crude oil recovery are of great significance for slowing down...

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Problems solved by technology

[0013] 2. Deterioration of heat transfer on the inner wall of the regenerative cooling jacket of the combustion chamber

However, under the condition of supercritical pressure, the heat load of the combustion chamber is further increased, and the physical properties of water near the temperature of the maximum specific heat zone, such as specific volume, specific heat capacity, specific enthalpy, viscosity, etc., will change sharply, which will affect the heat transfer. The effect is so great that it is possible to cause the steam bubbles generated in the cooling jacket of the combustion chamber to meet with each other, forming a film of steam on the inner wall of the combustion chamber, isolating the water from the wall, and cooling the inner wall by film boiling

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