Abstract: A flame hole unit structure of a combustion apparatus provided with a plurality of flame holes for forming a flame comprises: a lean flame hole unit including, as a flame hole for jetting lean gas, at least one lean flame hole extending along the longitudinal direction which is a direction perpendicular to the jetting direction of the lean gas; and a rich flame hole unit including, as a flame hole for jetting rich gas, a pair of rich flame hole provided on both sides of the lean flame hole unit with respect to a width direction which is a direction perpendicular to the jetting direction and the longitudinal direction and extending along a direction parallel to the longitudinal direction.

Abstract: The present subject matter relates to a smoke tube boiler including: a mix chamber, a heat exchanger, a firing rod assembly, a sealing means, and an air-cooled cooling means and a water-cooled cooling means.

Abstract: A shell-and-tube heat exchanger according to the present invention comprises: an outer barrel having a cavity provided therein such that heating water flows along the same; a lower tube plate that covers an opening near one end of the outer barrel; an upper tube plate that covers an opening near the other end of the outer barrel, the upper tube plate providing an inner space in which a heat source is positioned; a plurality of flues for guiding combustion gas from the upper tube plate to the outside of the lower tube plate; and a main diaphragm arranged across a reference direction between the lower tube plate and the upper tube plate, a plurality of through-holes being formed in the main diaphragm such that the flues penetrate the same, wherein at least some of the through-holes constitute a large-width through-hole (single hole) that at least two of the flues penetrate together.

Abstract: A flame port unit structure of a combustion apparatus provided with a plurality of flame ports for forming a flame comprises: a lean flame port unit, as a flame port for jetting lean gas, including a plurality of lean flame ports arranged along a width direction which is perpendicular to the jetting direction of the lean gas; and a rich flame port unit, as a flame port for jetting rich gas, including a pair of rich flame ports provided on both sides of the lean flame port unit with respect to a width direction, wherein the lean flame port unit comprises a first region in which a gap along the width direction of the lean flame port is formed along a longitudinal direction which is perpendicular to the jetting direction and the width direction, and a second region, provided on both sides along the longitudinal direction of the first region.

Abstract: The present invention relates to a smoke tube boiler including: a mix chamber which includes a mixing space in which combustion gas and air are mixed, a mix chamber body having a flat shape, and a flat plate-shaped burner disposed in a horizontal direction above a combustion chamber; and a heat exchanger which includes an outer shell forming an outer wall of a water tank into and from which a heat medium is introduced and discharged and which accommodates the heat medium, an upper tube plate having an end plate structure that is coupled to the outer shell and configured to form the combustion chamber, a plurality of tubes formed in a flat shape that are configured to allow combustion gas generated in the combustion chamber to flow therein and cause a heat exchange to occur between the combustion gas and the heat medium flowing outside the tubes, turbulators coupled to an inner side of the tube and configured to induce occurrence of a turbulent flow in the flow of the combustion gas, multi-stage barriers dispo

Abstract: A shell-and-tube heat exchanger according to the present invention comprises: an outer barrel having a cavity provided therein such that heating water flows along the same; a lower tube plate that covers an opening near one end of the outer barrel; an upper tube plate that covers an opening near the other end of the outer barrel, the upper tube plate providing an inner space in which a heat source is positioned; a plurality of flues for guiding combustion gas from the upper tube plate to the outside of the lower tube plate; and a main diaphragm arranged across a reference direction between the lower tube plate and the upper tube plate, a plurality of through-holes being formed in the main diaphragm such that the flues penetrate the same, wherein at least some of the through-holes constitute a large-width through-hole (single hole) that at least two of the flues penetrate together.

Abstract: A flame hole unit structure of a combustion apparatus provided with a plurality of flame holes for forming a flame comprises: a lean flame hole unit including, as a flame hole for jetting lean gas, at least one lean flame hole extending along the longitudinal direction which is a direction perpendicular to the jetting direction of the lean gas; and a rich flame hole unit including, as a flame hole for jetting rich gas, a pair of rich flame hole provided on both sides of the lean flame hole unit with respect to a width direction which is a direction perpendicular to the jetting direction and the longitudinal direction and extending along a direction parallel to the longitudinal direction.