CN216205206U

CN216205206U - Convection sealed heat-insulation aluminum alloy melting furnace

Info

Publication number: CN216205206U
Application number: CN202122571381.7U
Authority: CN
Inventors: 钟子锋
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-10-25
Filing date: 2021-10-25
Publication date: 2022-04-05
Anticipated expiration: 2031-10-25

Abstract

The utility model relates to the technical field of metal melting furnaces, and discloses a convection sealing heat-insulation aluminum alloy melting furnace which comprises: the furnace body is provided with a side wall and a combustion cavity enclosed by the side wall; the side wall is sequentially provided with a fire blocking layer, a heat insulation layer, a radiation heat insulation layer and a shell from inside to outside, the radiation heat insulation layer is a cavity layer surrounding the outside of the heat insulation layer, and the cavity layer is provided with a gas inlet; the tail gas negative suction device comprises a first cavity and a second cavity, one of the first cavity and the second cavity is connected with the combustion cavity through a tail gas connecting pipe and used for pumping and discharging tail gas, and the other of the first cavity and the second cavity is communicated with the cavity of the radiation heat-insulating layer through a convection connecting pipe; and a negative suction port for communicating the first cavity and the second cavity is arranged between the first cavity and the second cavity. The utility model has the characteristics of more energy saving, low temperature of the outer wall of the furnace body and smaller volume of the furnace body.

Description

Convection sealed heat-insulation aluminum alloy melting furnace

Technical Field

The utility model relates to the technical field of metal melting furnaces, in particular to a convection sealing heat-insulation aluminum alloy melting furnace.

Background

An aluminum alloy melting furnace is one of the most important devices in the aluminum alloy industry, and a large solid aluminum ingot needs to be melted into a molten state in the aluminum alloy melting furnace for further processing. In the prior art, a common aluminum alloy melting furnace is generally provided with a smoke self-refluxing heat storage function. For example, a chinese patent application with publication No. CN101900483A discloses an aluminum alloy melting furnace with a heat accumulating type burner, which comprises a furnace body, wherein an aluminum resistant water layer, a fire-resistant layer and a heat insulating layer are sequentially arranged on the side wall of the furnace body from inside to outside, a melting chamber and a holding chamber are arranged in the furnace body, a feeding tower is arranged right above the melting chamber, a flue gas channel is arranged between the melting chamber and the holding chamber, the heat accumulating type melting burner is arranged on the side wall of the melting chamber, the heat accumulating type holding burner is arranged on the side wall of the holding chamber, and a liquid outlet is arranged on the side wall of the holding chamber near the bottom.

Although the utility model has the characteristics of reduced energy consumption, reduced exhaust gas volume, improved heat efficiency and the like, the side wall of the melting furnace is only insulated by a heat insulation layer, and the problems of poor production working environment and energy waste caused by higher temperature of the outer wall of the furnace body still exist.

Disclosure of Invention

Aiming at the problems in the prior art, the utility model aims to provide a convection sealing heat-insulation aluminum alloy melting furnace with low outer wall temperature of a furnace body and smaller volume of the furnace body.

In order to achieve the purpose, the utility model adopts the following technical scheme.

The utility model provides a thermal-insulated aluminum alloy melting furnace of convection current sealing which characterized in that includes: the furnace body is provided with a side wall and a combustion cavity enclosed by the side wall; the side wall is sequentially provided with a fire blocking layer, a heat insulation layer, a radiation heat insulation layer and a shell from inside to outside, the radiation heat insulation layer is a cavity layer surrounding the outside of the heat insulation layer, and a gas inlet is formed in the cavity layer; the tail gas negative suction device comprises a first cavity and a second cavity, one of the first cavity and the second cavity is connected with the combustion cavity through the tail gas connecting pipe and is used for pumping and discharging tail gas, and the other of the first cavity and the second cavity is communicated with the cavity of the radiation heat-insulation layer through the convection connecting pipe; and a negative suction port for communicating the first cavity and the second cavity is arranged between the first cavity and the second cavity.

More preferably, the first cavity and the second cavity form an inside-outside nested structure.

More preferably, a crucible for loading an aluminum alloy ingot is provided in the combustion chamber.

More preferably, the fire barrier layer is a fire barrier wall, and the shell is of a metal shell or a refractory brick structure.

More preferably, the tail gas negative absorption device is of a metal piece or refractory brick structure.

More preferably, the radiation heat insulation layer is formed by spacing the outer shell and an inner shell attached to the outer side of the heat insulation layer; the radiation heat insulation layer is internally provided with a heat radiation layer, and the heat radiation layer is connected with the inner wall of the shell through the heat insulation layer.

More preferably, the inner shell is a metal outer shell or a refractory brick structure.

More preferably, a heat insulating member is disposed between the heat radiation layer and the inner case, and the heat insulating member partitions cavities of the heat radiation and insulation layer into a multi-cavity structure.

More preferably, the gas inlet of the radiant insulating layer is in direct communication with the outside air.

The utility model has the beneficial effects that: the side part of the furnace body is additionally provided with the radiation heat-insulating layer, and the cavity structure of the radiation heat-insulating layer can effectively improve the heat-insulating property of the side wall of the furnace body, thereby further playing the roles of reducing the volume of the melting furnace and reducing the heat loss of the furnace body. Meanwhile, the tail gas negative suction device is combined, when the combustion tail gas is pumped and exhausted, the gas can be sucked into the radiation heat insulation layer through the tail gas negative suction device to form a convection sealing structure, so that the heat emitted by the furnace body is further reduced, and the production working environment is improved; and the heat collected along with the tail gas can be treated in a centralized way, so that the heat can be recycled and the environment can be protected. In addition, due to the adoption of the negative absorption principle, the gas in the radiation heat-insulation layer flows without using additional energy power, thereby being beneficial to energy conservation and emission reduction.

Drawings

FIG. 1 is a schematic structural view of a convection sealed heat-insulating aluminum alloy melting furnace according to the present invention.

Fig. 2 shows a principle view of convection heat insulation.

Fig. 3 is a schematic structural view of the sealing layer.

Fig. 4 is another schematic diagram of an embodiment of the sealing layer.

Reference numerals indicate the same.

1: furnace body, 2: tail gas negative suction device, 3: tail gas connecting pipe, 4: convection connecting pipe, 5: a crucible which is provided with a plurality of holes,

1-1: fire barrier layer, 1-2: insulating layer, 1-3: radiation and thermal insulation layer, 1-4: shell, 1-5: gas inlet, 1-6: lumen, 1-7: a combustion chamber.

2-1: lumen, 2-2: outer cavity, 2-3: a negative suction port.

1-3-1: heat radiation layer, 1-3-2: thermal insulation layer, 1-3-3: a heat shield.

Detailed Description

In the description of the present invention, it should be noted that, for the terms of orientation, such as "central", "lateral", "longitudinal", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., it indicates that the orientation and positional relationship shown in the drawings are based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, but does not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated without limiting the specific scope of protection of the present invention.

Furthermore, if the terms "first" and "second" are used for descriptive purposes only, they are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features. Thus, a definition of "a first" or "a second" feature may explicitly or implicitly include one or more of the feature, and in the description of the utility model, "at least" means one or more unless specifically defined otherwise.

In the present invention, unless otherwise expressly specified or limited, the terms "assembled", "connected", and "connected" are to be construed broadly, e.g., as meaning fixedly connected, detachably connected, or integrally connected; or may be a mechanical connection; the two elements can be directly connected or connected through an intermediate medium, and the two elements can be communicated with each other. The specific meanings of the above terms in the present invention can be understood by those of ordinary skill in the art according to specific situations.

In the present application, unless otherwise specified or limited, "above" or "below" a first feature may include the first and second features being in direct contact, and may also include the first and second features not being in direct contact but being in contact with each other through another feature therebetween. Also, the first feature being "above," "below," and "above" the second feature includes the first feature being directly above and obliquely above the second feature, or simply an elevation which indicates a level of the first feature being higher than an elevation of the second feature. The first feature being "above", "below" and "beneath" the second feature includes the first feature being directly below or obliquely below the second feature, or merely means that the first feature is at a lower level than the second feature.

The following describes the embodiments of the present invention with reference to the drawings of the specification, so that the technical solutions and the advantages thereof are more clear and clear. The embodiments described below are exemplary and are intended to be illustrative of the utility model, but are not to be construed as limiting the utility model.

Additional aspects and advantages of the utility model will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the utility model.

As shown in fig. 1 to 3, a convection sealed heat-insulated aluminum alloy melting furnace includes: the device comprises a furnace body 1, a tail gas negative suction device 2, a tail gas connecting pipe 3 and a convection connecting pipe 4; the furnace body 1 is provided with a side wall and a combustion chamber 1-7 enclosed by the side wall, a crucible 5 used for loading aluminum alloy ingots is arranged in the combustion chamber 1-7, the side wall is sequentially provided with a fire blocking layer 1-1, a heat insulation layer 1-2, a radiation heat insulation layer 1-3 and a shell 1-4 from inside to outside, the radiation heat insulation layer 1-3 is a cavity layer surrounding the heat insulation layer 1-2, and a gas inlet 1-5 is arranged on the cavity layer; the tail gas negative suction device 2 comprises an inner cavity 2-1 and an outer cavity 2-2, the inner cavity 2-1 is connected with the combustion cavity 1-7 through the tail gas connecting pipe 3 and is used for pumping and discharging tail gas, and the outer cavity 2-2 is communicated with the cavity of the radiation heat insulation layer 1-3 through the convection connecting pipe 4; a negative suction port 2-3 is arranged between the outer cavity 2-2 and the inner cavity 2-1 and is used for negatively sucking the air in the outer cavity 2-2 into the inner cavity 2-1.

Compared with the prior art, the convection sealed heat-insulation aluminum alloy melting furnace provided by the embodiment has the advantages that the radiation heat-insulation layer 1-3 is additionally arranged on the side part of the furnace body 1, and the heat-insulation performance of the side wall of the furnace body can be effectively improved by utilizing the cavity structure of the radiation heat-insulation layer 1-3, so that the volume of the melting furnace is reduced, and the heat loss of the furnace body is reduced. Meanwhile, the tail gas negative suction device 2 is combined, when the combustion tail gas is pumped and exhausted, the gas can be sucked into the radiation heat-insulating layer 1-3 through the tail gas negative suction device 2 to form a convection sealing structure, so that the heat emitted outwards by the furnace body is further reduced, and the production working environment is improved; and the heat collected along with the tail gas can be treated in a centralized way, so that the heat can be recycled and the environment can be protected. In addition, due to the adoption of the negative absorption principle, the gas in the radiation heat-insulation layers 1-3 flows without using additional energy power, thereby being beneficial to energy conservation and emission reduction.

In this embodiment, the fire barrier layer 1-1 is preferably a fire barrier wall, the shell 1-5 is preferably a metal shell or a shell made of other refractory materials, and the area of the shell is different according to the size of the furnace body, and the thickness of the shell can be different according to requirements. In some embodiments, the fire barrier may be made of other refractory materials that are known in the art or can be realized in the future, and is not limited to this embodiment.

In this embodiment, the exhaust negative suction device 2 is preferably a metal part welded by a metal material, and has a simple structure and is convenient to process and manufacture. The shape of the tail gas negative suction device 2 can be round, square, oval, etc., and the size can be changed according to the actual requirement. In some embodiments, the exhaust gas negative suction device 2 may be constructed by brick-laying or casting refractory materials, and is not limited to this embodiment.

Referring to fig. 3 again, the radiation and thermal insulation layer 1-3 is formed by spacing the outer shell 1-4 and the inner shell 1-6 attached to the outer side of the thermal insulation layer 1-2; a heat radiation layer 1-3-1 is arranged in the heat radiation insulation layer 1-3, and the heat radiation layer 1-3-1 is connected with the inner wall of the shell 1-4 through a heat insulation layer 1-3-2. The advantage of providing the thermal radiation layer 1-3-1 is that the heat in the thermal radiation insulation layer 1-3 can be radiated to the cavity as much as possible, thereby reducing the heat loss to the outer shell 1-4 and further lowering the temperature of the outer shell 1-4.

In some embodiments, as shown in fig. 4, a thermal insulation member 1-3-3 is further disposed in the cavity of the radiant thermal insulation layer 1-3, preferably, the thermal insulation member 1-3-3 is suspended in the air and partitions the cavity into a multi-cavity structure; this provides a more excellent heat insulating effect. The thermal insulation members 1-3-3 can be one layer or two, three, or even more layers arranged at intervals, etc.; the technical personnel in the field can set according to different actual needs.

It should be noted that, in this embodiment, the inner shells 1 to 6 are made of metal or other refractory materials, and the area of the inner shell may be large or small according to the size of the furnace body, and the thickness may be thick or thin according to the requirement. The gas inlet 1-5 of the radiant insulating layer 1-3 is directly communicated with the outside air. In some embodiments, the gas inlets 1-5 may also be connected to other gas sources according to different actual needs, and are not limited to this embodiment.

It should be noted that, in some embodiments, the outer cavity of the exhaust gas negative suction device 2 may be used as a flue gas flow passage, and the inner cavity of the exhaust gas negative suction device 2 may be used as a convection flow passage, and at this time, the negative suction port negatively sucks convection gas from the inner cavity into the outer cavity. The inner cavity and the outer cavity have the advantages that the negative suction port can be arranged in a surrounding mode conveniently, and therefore the negative suction effect is improved. Obviously, in other embodiments, the design of the inner cavity and the outer cavity of the exhaust gas negative absorption device 2 may also be changed to a first cavity and a second cavity which are designed in parallel, and is not limited to the embodiment.

It will be appreciated by those skilled in the art from the foregoing description of construction and principles that the utility model is not limited to the specific embodiments described above, and that modifications and substitutions based on the teachings of the art may be made without departing from the scope of the utility model as defined by the appended claims and their equivalents. The details not described in the detailed description are prior art or common general knowledge.

Claims

1. The utility model provides a thermal-insulated aluminum alloy melting furnace of convection current sealing which characterized in that includes: the furnace body is provided with a side wall and a combustion cavity enclosed by the side wall; the side wall is sequentially provided with a fire blocking layer, a heat insulation layer, a radiation heat insulation layer and a shell from inside to outside, the radiation heat insulation layer is a cavity layer surrounding the outside of the heat insulation layer, and a gas inlet is formed in the cavity layer; the tail gas negative suction device comprises a first cavity and a second cavity, one of the first cavity and the second cavity is connected with the combustion cavity through the tail gas connecting pipe and is used for pumping and discharging tail gas, and the other of the first cavity and the second cavity is communicated with the cavity of the radiation heat-insulation layer through the convection connecting pipe; and a negative suction port for communicating the first cavity and the second cavity is arranged between the first cavity and the second cavity.

2. A convection sealed and insulated aluminum alloy melting furnace as claimed in claim 1, wherein the first chamber and the second chamber are formed in an inside-outside nested structure.

3. A convection sealed and heat insulated aluminum alloy melting furnace as claimed in claim 1, wherein a crucible for loading an aluminum alloy ingot is provided in said combustion chamber.

4. A convection sealed and insulated aluminum alloy melting furnace as claimed in claim 1, wherein the fire barrier is a fire barrier and the outer shell is of metal shell or refractory brick construction.

5. A convection sealed and heat insulated aluminum alloy melting furnace as claimed in claim 1, wherein the exhaust gas negative suction device is of a metal piece or refractory brick structure.

6. The convection sealed and heat insulated aluminum alloy melting furnace of claim 1, wherein the radiation heat insulation layer is formed by spacing the outer shell and the inner shell attached to the outer side of the heat insulation layer; the radiation heat insulation layer is internally provided with a heat radiation layer, and the heat radiation layer is connected with the inner wall of the shell through the heat insulation layer.

7. A convection sealed and insulated aluminum alloy melting furnace as claimed in claim 6, wherein the inner shell is of metal or refractory brick construction.

8. The aluminum alloy melting furnace as recited in claim 6, wherein a heat insulating member is provided between said heat radiation layer and said inner shell, said heat insulating member partitioning a cavity of said heat radiation insulating layer into a multi-chamber structure.

9. A convection sealed and insulated aluminum alloy melting furnace as claimed in claim 1, wherein the gas inlet of the radiant heat insulating layer is directly connected to the outside air.