Miniature liquid combustor having double pre-heating structure, and combustion method thereof

A miniature liquid combustor comprising:

• a double pre-heating structure, including a combustor outer drum body, an upper sealing plate used to seal an upper end of a combustor outer drum body, and a lower sealing plate used to seal a lower end of the combustor outer drum body, and a main vent hole opened on a sidewall of the lower end of the combustor outer drum body, wherein
• a first sleeve, a second sleeve, and a third sleeve are sequentially comprised inside the combustor outer drum body, lower ends of the first sleeve, the second sleeve, and the third sleeve are all sealed by a lower sealing plate, upper ends of the first sleeve and the third sleeve are both sealed by using a sealing top lid, and a gap is provided between an outer surface of the sealing top lid and an inner surface of the upper sealing plate, another gap is provided between a top end of the second sleeve and an inner surface of the sealing top lid;
• four partition plates that radially penetrate a sleeve wall of the second sleeve are further disposed on the sleeve wall of the second sleeve, an inner side of each partition plate is connected to an inner wall of the third sleeve, an outer side of the partition plate is connected to an inner wall of the first sleeve, an upper side of each partition plate is connected to a sealing top lid, and a lower side of each partition plate is connected to the lower sealing plate, the four partition plates divide a space between the first sleeve, the second sleeve, and the third sleeve into two opposite and independent air pre-heating chambers and two opposite and independent fuel pre-heating chambers;
• wherein each of the air pre-heating chambers is divided into a first air pre-heating chamber and a second air pre-heating chamber with a sleeve wall of the second sleeve as a boundary, and a first air pre-heating chamber and a second air pre-heating chamber are connected through a gap between the top end of the second sleeve and an inner surface of the sealing top lid;
• wherein each of the fuel pre-heating chambers may be divided into a first fuel pre-heating chamber and a second fuel pre-heating chamber with the sleeve wall of the second sleeve as a boundary, and the first fuel pre-heating chamber and the second fuel pre-heating chamber may be connected through the gap between the top end of the second sleeve and an inner surface of the sealing top lid;
• wherein a space in an inner wall surface of the third sleeve includes a combustion chamber, and space between an outer wall surface of the first sleeve and an inner wall surface of the combustor outer drum body includes a vent channel, and the combustion chamber and the vent channel are connected through a top-layer loop channel between the outer surface of the sealing top lid and an inner surface of an upper sealing plate;
• wherein one combustion-chamber air-inlet port is provided and can be opened respectively, corresponding to the second air pre-heating chambers of the two air pre-heating chambers, on a bottom peripheral wall of the third sleeve, and one combustion-chamber fuel-inlet port is opened respectively, corresponding to the second fuel pre-heating chambers of the two fuel pre-heating chambers on the bottom peripheral wall of the third sleeve;
• wherein one air inlet hole is respectively opened corresponding to the first air pre-heating chambers of the two air pre-heating chambers, on the lower sealing plate, one fuel inlet hole is respectively opened, corresponding to the first fuel pre-heating chambers of the two fuel pre-heating chambers, on the lower sealing plate;
• and
• wherein air sequentially passes through the first air pre-heating chambers, the second air pre-heating chambers, and the combustion-chamber air-inlet ports from the air inlet holes to enter the combustion chamber, and a fuel sequentially passes through the first fuel pre-heating chambers, the second fuel pre-heating chambers, and the combustion-chamber fuel-inlet ports from fuel inlet holes to enter the combustion chamber and is mixed with air for combustion, and waste gas after combustion passes through the top-layer loop channel and the vent channel to be eventually discharged outside the combustor outer drum body from the main vent hole.