Energy-efficient upside-entrainment burning system
The present disclosure discloses an energy-efficient upside-entrainment burning system, which includes: a gas distributor component, an ejection pipe component, an outer-ring burner cap, an inner-ring burner cap, a plurality of gas nozzles. The ejection pipe component is arranged below gas distributor component, is provided with two ejection channels in a centrosymmetric structure corresponding to the outer-ring gas mixing chamber, also provided with two ejection channels in a centrosymmetric structure corresponding to inner-ring gas mixing chamber. Each ejection channel is arranged in a Venturi pipe structure. In a gas flowing direction, an ejection pipe inlet, a contraction section, a throat section, an expansion section, an ejection pipe outlet are arranged in sequence. An ejection capability is taken as a target parameter, each ejection capability parameter is of adjustment simulation to obtain optimum design of each structural detail of burner to form the energy-efficient upside-entrainment burning system with an optimum ejection capability.
1 . An energy-efficient upside-entrainment burning system, comprising a gas distributor component, an ejection pipe component, an outer-ring burner cap, an inner-ring burner cap, and a plurality of gas nozzles,
wherein the gas distributor component is provided with an inner-ring gas mixing chamber and an outer-ring gas mixing chamber that are arranged annularly; the inner-ring burner cap and the outer-ring burner cap respectively cover above the inner-ring gas mixing chamber and the outer-ring gas mixing chamber;
the ejection pipe component is arranged below the gas distributor component, is provided with ejection channels in a centrosymmetric structure corresponding to the outer-ring gas mixing chamber, and the inner-ring gas mixing chamber;
the gas nozzles are arranged at a gas inlet end of each of the ejection channels;
the ejection channels are arranged in a Venturi pipe structure; and in a gas flowing direction, an ejection pipe inlet, a contraction section, a throat section, an expansion section, and an ejection pipe outlet are arranged in sequence;
the contraction section is of a conical structure that gradually contracts, and a value of a cone angle of the contraction section ranges from 35° to 40°;
wherein an air channel is arranged in an axial direction of the gas nozzles; the air channel is provided with an air inlet section;
wherein a value of a cone angle of the air inlet section ranges from 37° to 45°;
a plurality of fire holes are arranged in circumferential directions of the outer-ring burner cap and the inner-ring burner cap;
a value of an inclination angle of the fire holes ranges from 35° to 40°.
2 . The energy-efficient upside-entrainment burning system according to claim 1 , wherein a value of a hole diameter of the throat section of the ejection channels communicated with the inner-ring gas mixing chamber ranges from 6 mm to 8 mm; and a value of a hole diameter of the throat section of the ejection channels communicated with the outer-ring gas mixing chamber ranges from 9 mm to 10 mm.
3 . The energy-efficient upside-entrainment burning system according to claim 1 , wherein a value of an axial distance between the ejection pipe inlet of the ejection channels communicated with the inner-ring gas mixing chamber and the gas nozzles is less than 2 mm; and a value of an axial distance between the ejection pipe inlet of the ejection channels communicated with the outer-ring gas mixing chamber and the gas nozzles is less than 1 mm.
4 . The energy-efficient upside-entrainment burning system according to claim 1 , wherein the air channel is further provided with an air ejection section and an air outlet section;
the air inlet section is of a cone angle-shaped structure that gradually contracts; a nozzle throat is also arranged between the air inlet section and the air ejection section; and a plurality of nozzle ejection ports are formed in a periphery of the air ejection section in a radial direction.
5 . The energy-efficient upside-entrainment burning system according to claim 4 , wherein a value of a hole diameter of the nozzle ejection ports ranges from 5 mm to 6 mm.
6 . The energy-efficient upside-entrainment burning system according to claim 1 , wherein
a value of a hole diameter of the fire holes ranges from 2.7 mm to 2.9 mm.
7 . The energy-efficient upside-entrainment burning system according to claim 1 , wherein the ejection pipe component comprises an ejection pipe seat and an ejection pipe cap that are capable of being disassembled and assembled; and the ejection pipe cap is capable of being embedded into the ejection pipe seat, and encloses to form the ejection channels.