Opposed-injection aluminum melting furnace uniform combustion system

Patent metadata

Field	Value
Publication number	US-11519599-B2
Application number	US-201716761774-A
Country	US
Kind code	B2
Filing date	Nov 8, 2017
Priority date	Nov 8, 2017
Publication date	Dec 6, 2022
Grant date	Dec 6, 2022

Abstract

The invention discloses an opposed-injection aluminum melting furnace uniform combustion system which comprises: a furnace body, a first heat storage unit, a second heat storage unit, and four fuel injection guns disposed diagonally on two end walls of the furnace body comprising a first fuel injection gun located on the first end wall of the furnace body adjacent to the second heat storage unit, a second fuel injection gun located on the second end wall of the furnace body adjacent to the first heat storage unit, a third fuel injection gun on the second end wall of the furnace body adjacent to the second heat storage unit, and a fourth fuel injection gun located on the first end wall of the furnace body adjacent to the first heat storage unit, the gas injection direction of the first fuel injection gun is parallel with that of the second fuel injection gun with a spacing H between the axes thereof, the gas injection direction of the third fuel injection gun is parallel with that of the fourth fuel injection gun, with a spacing H between the axes thereof, and the spacing H between the axes is set to a quarter to one tenth of the furnace body width, such that the gas entering the chamber are oppositely-injected to form a swirling flow.

First claim

The invention claimed is:

1. An opposed-injection aluminum melting furnace uniform combustion system, comprises:
a furnace body having a chamber for combustion heat release;
a first heat storage unit, the first heat storage unit is located on one side of the furnace body and includes: a first port disposed at the innermost side of the first heat storage unit and connected with the chamber, a second port disposed at the outermost side of the first heat storage unit, and at least two third ports;
a second heat storage unit, the second heat storage unit is located on the other side of the furnace body and includes: a first port disposed at the innermost side of the second heat storage unit and connected with the chamber, a second port disposed at the outermost side of the second heat storage unit, and at least two third ports;
the second port of the first heat storage unit and the second port of the second heat storage unit are respectively connected to a chimney through pipes, the at least two third ports of the first heat storage unit and the at least two third ports of the second heat storage unit are respectively connected to an air source through pipes; and
four fuel injection guns;
wherein the four fuel injection guns are disposed diagonally on two end walls of the furnace body, wherein the four fuel injection guns include a first fuel injection gun located on the first end wall of the furnace body adjacent to the second heat storage unit, a second fuel injection gun located on the second end wall of the furnace body adjacent to the first heat storage unit, a third fuel injection gun located on the second end wall of the furnace body adjacent to the second heat storage unit, and a fourth fuel injection gun located on the first end wall of the furnace body adjacent to the first heat storage unit,
wherein, the gas injection direction of the first fuel injection gun is parallel with that of the second fuel injection gun, with a spacing H between the axes thereof, and the gas injection direction of the third fuel injection gun is parallel with that of the fourth fuel injection gun, with a spacing H between the axes thereof, the spacing H between the axes is set to one fourth to one tenth of the width of the furnace body, such that the gas entering the chamber are oppositely injected to form a swirling flow;
a plurality of control valves are provided on the at least two third ports of the first heat storage unit, the at least two third ports of the second heat storage unit, an inlet of the first fuel injection gun, an inlet of the second fuel injection gun, an inlet of the third fuel injection gun, and an inlet of the fourth fuel injection gun to realize the switching between heat releasing state and heat storing state of the first heat storage unit and the second heat storage unit alternately; and
wherein, the first heat storage unit includes: a first heat storage device, a second heat storage device, an air distribution chamber, and a heat exchange device arranged in sequence from inside out, wherein the first heat storage device of the first heat storage unit, the second heat storage device of the first heat storage unit, and the gas distribution chamber of the first heat storage unit are sequentially connected, and at least two air passages connecting with the at least two third ports of the first heat storage unit are provided on the outer side wall of the air distribution chamber of the first heat storage unit, a heat exchange chamber and a collection chamber are provided in the heat exchange device of the first heat storage unit from inside out, at least three first flue gas passages connecting with the inner side wall of the heat exchange chamber of the first heat storage unit are provided on the outer side wall of the air distribution chamber of the first heat storage unit, at least three second flue gas passages connecting with the inner side wall of the collection chamber of the first heat storage unit are provided on the outer side wall of the heat exchange chamber of the first heat storage unit and the third flue gas passage connecting with the second port of the first heat storage unit is provided on the outer side wall of the collection chamber of the first heat storage unit;
the second heat storage unit includes: a first heat storage device, a second heat storage device, an air distribution chamber, and a heat exchange device arranged in sequence from inside out, wherein the first heat storage device of the second heat storage unit, the second heat storage device of the second heat storage unit, and the air distribution chamber of the second heat storage unit are sequentially connected, and at least two air passages connecting with the at least two third ports of the second heat storage unit are provided on the outer side wall of the air distribution chamber of the second heat storage unit, a heat exchange chamber and a collection chamber are provided in the heat exchange device of the second heat storage unit from inside out, at least three first flue gas passages connecting with the inner side wall of the heat exchange chamber of the second heat storage unit are provided on the outer side wall of the air distribution chamber of the second heat storage unit, at least three second flue gas passages connecting with the inner side wall of the collection chamber of the second heat storage unit are provided on the outer side wall of the heat exchange chamber of the second heat storage unit, and a third flue gas passage connecting with the second port of the second heat storage unit is provided on the outer side wall of the collection chamber of the second heat storage unit.

2. The opposed-injection aluminum melting furnace uniform combustion system according to claim 1 , wherein the axis of the first fuel injection gun, the axis of the second fuel injection gun, the axis of the third fuel injection gun and the axis of the fourth fuel injection gun are located on the same plane.

3. The opposed-injection aluminum melting furnace uniform combustion system according to claim 1 , wherein when the first heat storage unit works under heat storing state, the first port of the first heat storage unit serves as a high-temperature flue gas inlet, the second port of the first heat storage unit serves as a low-temperature flue gas outlet, and the at least two third ports of the first heat storage unit are closed;
when the second heat storage unit works under heat releasing state, the at least two third ports of the second heat storage unit serve as the low-temperature air inlet, the first port of the second heat storage unit serves as the high-temperature air outlet, and the second port of the second heat storage unit is closed;
the first fuel injection gun and the second fuel injection gun inject gas into the chamber, and the third fuel injection gun and the fourth fuel injection gun are in the closed state.

4. The opposed-injection aluminum melting furnace uniform combustion system according to claim 1 , wherein when the first heat storage unit works under heat releasing state, the at least two third ports of the first heat storage unit serve as low-temperature air inlets, the first port of the first heat storage unit serves a high-temperature air outlet, and the second port of the first heat storage unit is closed;
when the second heat storage unit works under heat storing state, the first port of the second heat storage unit serves as a high-temperature flue gas inlet, the second port of the second heat storage unit serves as a low-temperature flue gas outlet, and the at least two third ports of the second heat storage unit are closed;
the third fuel injection gun and the fourth fuel injection gun inject gas into the chamber and the first fuel injection gun and the second fuel injection gun are closed.

5. The opposed-inje

Assignees

• Univ Guangdong Technology

Inventors

• Liu Xiaozhou
• Zhang Yu
• Liu Wenxing

Classifications

• F27D17/00 Primary

  Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases · CPC title

• F23K3/02

  Pneumatic feeding arrangements, i.e. by air blast · CPC title

• F23C5/28 Primary

  to obtain flames in opposing directions, e.g. impacting flames · CPC title

• F23L15/02

  Arrangements of regenerators · CPC title

• Y02P10/25

  Process efficiency · CPC title