Energy-saving compact type aluminum alloy centralized melting furnace

Abstract

The invention provides an energy-saving compact aluminum alloy centralized melting furnace, and relates to the field of melting furnaces. The centralized melting furnace comprises a centralized melting furnace body, a melting hearth and a heat preservation hearth are arranged on the centralized melting furnace body, and a feeding furnace opening is formed in the furnace top of the centralized melting furnace body; a transition groove is formed between the melting hearth and the heat preservation hearth. The method has the effect of improving the efficiency.

Description

Technical Field

[0001] The present application relates to the field of melting furnaces, and in particular to an energy-saving and compact aluminum alloy centralized melting furnace. Background Art

[0002] Gas-fired aluminum melting and holding furnaces are often constructed as circular furnaces with fans mounted on the ground near the furnace body. The furnace chamber is traditionally open, allowing the high-temperature flue gases from the molten aluminum alloy to be discharged directly into the furnace body and then emptied, resulting in ineffective heat loss. During slag discharge, due to the positive furnace pressure, the flames often surge toward the furnace mouth. Over time, this can damage the insulation structure of the furnace door and accelerate the aging of refractory bricks. Furthermore, with the increasingly tight supply of fossil energy in modern society and the persistently high prices of oil and gas, aluminum melting furnaces, as major heat consumers, must adopt effective methods to improve energy efficiency, particularly gas usage. Summary of the Invention

[0003] In order to improve the problems existing in the above-mentioned technologies, the present application provides an energy-saving and compact aluminum alloy centralized melting furnace.

[0004] The present application provides an energy-saving and compact aluminum alloy centralized melting furnace, which adopts the following technical solutions: An energy-saving, compact aluminum alloy centralized melting furnace, characterized by comprising: a centralized melting furnace body, the centralized melting furnace body being provided with a melting furnace chamber and a heat-insulating furnace chamber, a charging port being provided on the top of the centralized melting furnace body; a transition groove being provided between the melting furnace chamber and the heat-insulating furnace chamber; A feeding tower is installed on the main body of the centralized melting furnace, wherein the four inner sides of the feeding tower are respectively provided with a first dropping slope, a second dropping slope, a third dropping slope, and a fourth dropping slope, and a furnace cover is provided on the top of the feeding tower; A large smoke exhaust hood installed on the charging tower, the large smoke exhaust hood including a furnace door hood and a fan, a heat exchanger is provided on the upper inner side of the top of the charging tower, and the fan is placed on the roof of the centralized melting furnace body; A combustion device is installed on the furnace roof of the centralized melting furnace body.

[0005] By adopting the above technical solution, the service life can be extended and the energy utilization efficiency can be improved.

[0006] Optionally, the main body of the centralized melting furnace is a square furnace, and the melting furnace chamber is higher than the heat-insulating furnace chamber.

[0007] By adopting the above technical solution, the main body of the centralized melting furnace has a square shape, a compact structure and a small footprint.

[0008] Optionally, an automatic opening and closing device is installed on the furnace cover.

[0009] Optionally, a melting furnace door and an insulation furnace door are installed on the main body of the centralized melting furnace, and furnace door smoke hoods are provided on the upper sides of the melting furnace door and the insulation furnace door, a furnace door lifting structure is installed on the furnace door smoke hood, and a furnace door lifting reducer is installed on the furnace door lifting structure.

[0010] Optionally, the combustion device includes a combustion-supporting air blower, a burner and a gas pipeline, and the burner and the gas pipeline are both arranged on the furnace top of the centralized melting furnace body.

[0011] By adopting the above technical solution, during the operation, when the elevator structure needs to feed materials into the melting furnace, the feed door of the furnace door hood and the furnace cover are opened at the same time, and the aluminum material enters the feeding tower and dumps onto the feeding tower. At this time, small materials are directly melted by heat and flow into the melting furnace, and larger materials are stuck in the feeding tower and are burned by gas fire. The inclined structure on all four sides of the feeding tower facilitates the storage of more aluminum materials, improves efficiency, reduces the number of door openings, and reduces heat loss.

[0012] Optionally, the heating pipe of the heat exchanger is made of heat-resistant steel.

[0013] Optionally, a blocking assembly is provided on the feeding tower, and the blocking assembly includes: a blocking part, a control part and a driving part. The blocking part is provided on the feeding tower, and the control part and the driving part are both provided on the feeding tower, and the driving part is connected to the control part.

[0014] By adopting the above technical solution, the blocking component is used to further block larger materials, thereby facilitating full combustion of the larger materials; and can control the blocking of materials of different sizes.

[0015] Optionally, the blocking portion includes: a blocking piece, and the blocking piece is hingedly mounted on the feeding tower.

[0016] By adopting the above technical solution and utilizing the blocking sheet, materials of different sizes can be blocked.

[0017] Optionally, the control part includes: a screw and a control sleeve, a drive cavity is opened on the feeding tower, one end of the control sleeve is arranged in the drive cavity, and the other end passes through the feeding tower and abuts against the blocking plate, one end of the screw is rotatably installed in the drive cavity, and the other end is threadedly arranged in the control sleeve, and the drive part is connected to the screw.

[0018] By adopting the above technical solution, during regulation, the driving screw is rotated to drive the control sleeve to move, thereby pushing the blocking piece to flip.

[0019] Optionally, the driving unit includes: a driving motor, the driving motor is installed on the feeding tower, and the output shaft of the driving motor is coaxially fixed with the screw.

[0020] By adopting the above technical solution, when adjusting and controlling, the driving motor is started to drive the screw to rotate so that the control sleeve can move.

[0021] In summary, this application has at least one of the following beneficial effects: 1. It can extend service life and improve energy efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a structural schematic diagram of the present invention; Figure 2a It is a structural schematic diagram of the main body of the centralized melting furnace in the present invention; Figure 2b for Figure 2a Side view of; Figure 2c for Figure 2a A top view of Figure 3 Schematic diagram of the structure of the furnace cavity in the present invention; Figure 4a Schematic diagram of the structure of the feeding tower in the present invention; Figure 4b for Figure 4a A longitudinal cross-sectional view of Figure 4c for Figure 4a transverse cross-sectional view; Figure 5 This is a left side view of the furnace door and smoke hood at the top of the charging tower in the present invention; Figure 6 This is the front view of the furnace door and smoke hood at the top of the charging tower in the present invention.

[0023] Figure: 1. Centralized melting furnace body; 1.1. Melting furnace door; 1.2. Furnace door hood; 1.3. Furnace door lifting structure; 1.4. Furnace door lifting reducer; 1.5. Insulated furnace door; 1.6. Charging port; 1.7. Melting furnace chamber; 1.8. Melting furnace port; 1.9. Insulated furnace port; 1.10. Transition trough; 1.11. Insulated furnace chamber; 2. Charging tower; 2.1. Blanking slope 1; 2.2. Blanking slope 2; 2.3. Blanking slope 3; 2.4. Blanking slope 4; 3. Exhaust furnace door hood; 3 .1. Feed door; 3.2. Lid lifting mechanism; 3.3. Slide rail support; 3.4. Suspension roller; 3.5. Feed door slide rail; 3.6. Heat exchanger; 3.7. Heating tube; 3.8. Heat exchanger outlet flange; 3.9. Automatic smoke exhaust valve; 3.10. Flange interface; 3.11. Furnace cover; 3.12. Furnace door and smoke hood door opening and closing mechanism; 4. Combustion device; 5. Blocking part; 51. Blocking plate; 6. Control part; 61. Screw; 62. Control sleeve; 63. Drive chamber; 7. Drive part; 71. Drive motor. DETAILED DESCRIPTION

[0024] The present application provides an energy-saving and compact aluminum alloy centralized melting furnace.

[0025] See also Figure 1-6 An energy-saving and compact aluminum alloy centralized melting furnace includes: a centralized melting furnace body 1, a charging tower 2, a smoke exhaust furnace door hood 3, and a combustion device 4; the centralized melting furnace body 1 is arranged in a square shape with a compact structure; a melting furnace door 1.1 and an insulation furnace door 1.5 are installed on the centralized melting furnace body 1, and furnace door hoods 1.2 are provided on the upper sides of the melting furnace door 1.1 and the insulation furnace door 1.5, and furnace door hoods 1.2 are both installed with furnace door lifting structures 1.3, and the furnace door lifting structure 1.3 is installed with a furnace door lifting reducer 1.4.

[0026] As shown in Figure 4 (that is, Figure 4a 、 Figure 4b 、 Figure 4c ), each inner surface of the feeding tower 2 is respectively provided with a blanking slope 1 2.1, a blanking slope 2.2, a blanking slope 3 2.3, and a blanking slope 4 2.4; the opening is larger at the top and smaller at the bottom, which is conducive to storing aluminum materials.

[0027] Exhaust hood 3: The exhaust hood 3 is provided with a furnace door hood 1.2 and a fan. A heat exchanger 3.6 is provided in the furnace door hood 1.2 and is placed above the inside of the charging tower 2; the fan is placed on the roof of the centralized melting furnace body 1.

[0028] Combustion device 4: includes a burner igniter and a gas pipeline.

[0029] Furthermore, the centralized melting furnace body 1 is provided with a melting furnace 1.7 and a heat-insulating furnace 1.11; a charging port 1.6 is provided on the top of the centralized melting furnace body 1, and a transition trough 1.10 is provided between the melting furnace 1.7 and the heat-insulating furnace 1.11.

[0030] Furthermore, a furnace cover 3.11 is provided at the top of the charging tower 2 (i.e., the bottom of the furnace door hood 1.2), and the furnace pressure is formed from zero pressure to negative pressure; the furnace cover 3.11 is provided with an automatic opening and closing device; It also includes a combustion air blower, a burner and a gas pipeline. The burner and the gas pipeline are all arranged on the top of the centralized melting furnace body 1, reducing the occupied area and realizing intensive use of land.

[0031] During operation, when the elevator structure needs to feed materials into the melting furnace 1.7, the feed door 3.1 and the furnace cover 3.11 of the furnace door hood 1.2 are opened at the same time, and the aluminum materials enter the feeding tower 2 and pour onto the feeding tower 2. At this time, small materials are directly melted by the heat and flow into the melting furnace 1.7, while larger materials are stuck in the feeding tower 2 and are burned by the gas fire. The four-sided inclined structure of the feeding tower 2 facilitates the storage of more aluminum materials, improves efficiency, reduces the number of door openings, and reduces heat loss.

[0032] The furnace door hood 1.2 also includes an automatic exhaust valve 3.9 at the top. When the exhaust valve is opened, the high-temperature flue gas rises and heats the heating tube 3.7 of the new heat exchanger 3.6, raising the temperature of the combustion air in the tube, thus effectively utilizing the heat energy of the flue gas. The flue gas, which has absorbed most of the heat, cools down and continues to rise, entering the exhaust system. After other treatments, it is finally discharged harmlessly. The furnace door hood 1.2 also has a flange interface 3.10 located below the heat exchanger 3.6. It communicates with the furnace door hood 1.2 of the melting furnace and the holding furnace (see Figure 2 for details). Figure 2a 、 Figure 2b 、 Figure 2c ), when the melting furnace door 1.1 and the insulation furnace door 1.5 are opened, the outflowing high-temperature flue gas flows through the furnace door hood 1.2 to the flange interface 3.10 and enters the furnace door hood 1.2, and can also heat the heating pipe 3.7 of the heat exchanger 3.6, further increasing the temperature of the combustion air.

[0033] During operation, when the aluminum material is normally melted, the furnace cover 3.11 is closed, covering the furnace mouth, and the new furnace cavity structure design (see attached Figure 3 ) creates zero pressure or even a certain negative pressure within the furnace chamber, facilitating efficient combustion of the gas. To improve furnace efficiency, the PLC control system can be used to control the opening and closing of the feed door 3.1, furnace cover 3.11, and automatic smoke exhaust valve 3.9, greatly improving working conditions and facilitating maintenance.

[0034] It should be understood that the straight-through heat exchanger 3.6 structure originally proposed by the present invention can increase or decrease the length, angle, and path setting of the intermediate heating tube 3.7, or adjust the position and orientation of the inlet and outlet flanges as needed in different working environments to meet the needs of furnaces with different melting rates and aluminum liquid retention capacities, meet the diverse needs of customers, and improve energy utilization efficiency.

[0035] Please continue to refer to Figure 3 It should be emphasized that: in the past, when the furnace pressure was relatively high, when the melting furnace door 1.1 and the insulation furnace door 1.5 were opened, the furnace fire would surge outward from the melting furnace mouth 1.8 or the insulation furnace mouth 1.9, causing the furnace door insulation layer to be damaged and the furnace lining structure to age faster. When the furnace pressure was too low, it would lead to insufficient combustion heat, large heat loss, and waste of energy such as gas. Now, by optimizing the furnace body and combining it with modern computer PID detection methods, the furnace pressure can be effectively controlled to a micro-negative pressure of 0 to -50Pa. This does not affect the furnace cavity strength and is conducive to the full combustion of gas, greatly reducing the occurrence of furnace door failure under high temperature conditions, extending the working life of the furnace door structure, and is highly practical.

[0036] The furnace door hood 1.2 adds a new straight-through heat exchanger 3.6 to fully utilize the waste heat of the flue gas to heat the combustion air. The gas pipeline from the outlet flange of the heat exchanger 3.6 to the igniter can also be sealed and insulated with insulating materials such as mineral wool needle-punched blanket. This will further reduce the heat loss of the combustion air output by the heat exchanger 3.6 and is also an effective supplement to the function of the heat exchanger 3.6.

[0037] Of course, the heat exchange area can also be increased to improve the heat energy utilization rate of the flue gas by modifying the heat exchanger 3.6, the heating tube 3.7, and the air inlet and outlet structures at both ends. These are not exhaustive examples here. It is worth mentioning that, based on customer needs, the present invention adjusts the shape of the melting furnace body, the flue angle, and the position of the furnace door hood 1.2 to make the melting furnace more compact and aesthetically pleasing, and facilitates use and maintenance, which is also a key factor in the promotion of this melting furnace.

[0038] The feeding tower 2 is provided with a blocking component, which is used to further block larger materials, thereby facilitating full combustion of the larger materials; and can control the blocking of materials of different sizes.

[0039] The blocking assembly includes: a blocking part 5, a control part 6 and a driving part 7. In the embodiment of the present application, there are four blocking assemblies in total.

[0040] The blocking portion 5 includes a blocking piece 51 , which is hingedly mounted on the feeding tower 2 . The four blocking pieces 51 cooperate to block materials of different sizes.

[0041] The control unit 6 comprises a screw 61 and a control sleeve 62. The feeding tower 2 defines an annular drive chamber 63. One end of the control sleeve 62 resides within the drive chamber 63, while the other end extends through the feeding tower 2 and abuts against the corresponding blocking plate 51. In this embodiment, the control sleeve 62 is square in shape. One end of the screw 61 is rotatably mounted within the drive chamber 63, while the other end is threadedly connected to the control sleeve 62. When control is required, the screw 61 is rotated to move the control sleeve 62, thereby causing the blocking plate 51 to flip.

[0042] The driving part 7 includes: a driving motor 71, which is installed on the feeding tower 2, and the output shaft of the driving motor 71 is coaxially fixed with the screw 61. When adjusting, starting the driving motor 71 can drive the screw 61 to rotate so that the control sleeve 62 can move.

[0043] The working principle of an energy-saving and compact aluminum alloy centralized melting furnace of the present application when in use is specifically as follows: during operation, when the elevator structure needs to feed materials into the melting furnace 1.7, the feed door 3.1 and the furnace cover 3.11 of the furnace door smoke hood 1.2 are opened at the same time, and the aluminum material enters the feeding tower 2 and pours onto the feeding tower 2. At this time, the small material is directly heated and melted and flows into the melting furnace 1.7, and the larger material is stuck in the feeding tower 2 and is burned by the gas fire. The inclined structure on all four sides of the feeding tower 2 facilitates the storage of more aluminum materials, improves efficiency, reduces the number of door openings, and reduces heat loss.

[0044] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. An energy-saving compact aluminum alloy centralized melting furnace, characterized in that: include: A centralized melting furnace body (1), wherein the centralized melting furnace body (1) is provided with a melting furnace chamber (1.7) and a heat-insulating furnace chamber (1.11); a charging port (1.6) is provided on the top of the centralized melting furnace body (1); and a transition groove (1.10) is provided between the melting furnace chamber (1.7) and the heat-insulating furnace chamber (1.11); A feeding tower (2) is installed on the main body (1) of the centralized melting furnace, wherein the four inner peripheries of the feeding tower (2) are respectively provided with a first dropping slope (2.1), a second dropping slope (2.2), a third dropping slope (2.3), and a fourth dropping slope (2.4), and a furnace cover (3.11) is provided on the top of the feeding tower (2); a large smoke exhaust hood (3) installed on the feeding tower (2), the large smoke exhaust hood (3) comprising a furnace door hood (1.2) and a fan, a heat exchanger (3.6) being provided on the inner upper side of the top of the feeding tower (2), and the fan being placed on the furnace roof of the centralized melting furnace body (1); A combustion device (4) is installed on the furnace top of the centralized melting furnace body (1).

2. The energy-saving compact aluminum alloy centralized melting furnace according to claim 1, characterized in that: The centralized melting furnace body (1) is a square furnace, and the melting furnace chamber (1.7) is higher than the heat-insulating furnace chamber (1.11).

3. The energy-saving compact aluminum alloy centralized melting furnace according to claim 2, characterized in that: An automatic opening and closing device is installed on the furnace cover (3.11).

4. The energy-saving compact aluminum alloy centralized melting furnace according to claim 1, characterized in that: A melting furnace door (1.1) and a heat-insulating furnace door (1.5) are installed on the main body (1) of the centralized melting furnace, and furnace door smoke hoods (1.2) are provided on the upper sides of the melting furnace door (1.1) and the heat-insulating furnace door (1.5). A furnace door lifting structure (1.3) is installed on the furnace door smoke hood (1.2), and a furnace door lifting reducer (1.4) is installed on the furnace door lifting structure (1.3).

5. The energy-saving compact aluminum alloy centralized melting furnace according to claim 4, characterized in that: The combustion device (4) comprises a combustion-supporting air blower, a burner and a gas pipeline, and the burner and the gas pipeline are both arranged on the furnace top of the centralized melting furnace body (1).

6. The energy-saving compact aluminum alloy centralized melting furnace according to claim 5, characterized in that: The heating pipe (3.7) of the heat exchanger (3.6) is made of heat-resistant steel.

7. The energy-saving compact aluminum alloy centralized melting furnace according to claim 5, characterized in that: The feeding tower (2) is provided with a blocking assembly, which comprises a blocking portion (5), a control portion (6) and a driving portion (7). The blocking portion (5) is provided on the feeding tower (2), the control portion (6) and the driving portion (7) are both provided on the feeding tower (2), and the driving portion (7) is connected to the control portion (6).

8. The energy-saving compact aluminum alloy centralized melting furnace according to claim 7, characterized in that: The blocking portion (5) comprises a blocking piece (51), and the blocking piece (51) is hingedly mounted on the feeding tower (2).

9. The energy-saving compact aluminum alloy centralized melting furnace according to claim 8, characterized in that: The control part (6) comprises: a screw (61) and a control sleeve (62); a driving chamber (63) is provided on the feeding tower (2); one end of the control sleeve (62) is arranged in the driving chamber (63), and the other end passes through the feeding tower (2) and abuts against the blocking plate (51); one end of the screw (61) is rotatably installed in the driving chamber (63), and the other end is threadedly arranged in the control sleeve (62); the driving part (7) is connected to the screw (61).

10. The energy-saving compact aluminum alloy centralized melting furnace according to claim 9, characterized in that: The driving part (7) comprises a driving motor (71), the driving motor (71) is mounted on the feeding tower (2), and the output shaft of the driving motor (71) is coaxially fixed with the screw (61).

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