Combustion chamber structure of gas furnace

Abstract

The utility model discloses a combustion chamber structure of a gas melting furnace, comprising a cavity formed by wrapping a refractory material; the cavity is a cylinder with a vertical central axis; at least four burners are plugged into the refractory material; the outlet end of the burner is connected to the cavity, and from a top view, the multiple burners are evenly distributed around the circumference, and the flame spraying direction of the outlet end is eccentrically arranged with the central axis; and the multiple burners are arranged in a spiral ascending manner around the central axis. The utility model can improve the heating uniformity of the gas furnace, have a good heating effect, high heating efficiency, and extend the service life of the furnace refractory material.

Description

Technical Field

[0001] The utility model belongs to the technical field of smelting furnaces, and in particular relates to a combustion chamber structure of a gas-fired smelting furnace. Background Art

[0002] In a traditional gas-fired smelting furnace, such as the patent "A Gas-fired Smelting Furnace" with the announcement number CN208075574U, the smelting raw materials are first added from the top of the furnace, and then the smelting raw materials are heated in the furnace. Gas-fired smelting generally has only one burner to heat the smelting raw materials inside the furnace chamber. However, due to the limited number of burners, there is a heating dead corner inside the furnace chamber, resulting in local high temperature, uneven heating of the smelting raw materials, and uneven heating will lead to a decrease in smelting efficiency and a long smelting time. If the smelting time is too long, it is very easy to oxidize the molten iron, and the oxidized molten iron has extremely poor fluidity, which is very unfavorable for casting castings, and may even make the castings unable to be cast. In addition, uneven heating can also make the life of the refractory materials in the furnace body fail to achieve the expected effect. Summary of the invention

[0003] In order to overcome the deficiencies in the background technology, the utility model provides a combustion chamber structure of a gas melting furnace, aiming to improve the uniformity of heating inside the combustion chamber of the gas melting furnace, designing multiple burners arranged in a spiral ascending manner to avoid heating dead corners and improve heating efficiency.

[0004] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0005] A combustion chamber structure of a gas-fired melting furnace comprises a cavity formed by wrapping a refractory material; the cavity is cylindrical with a vertical central axis; at least four burners are plugged into the refractory material; the outlet ends of the burners are connected to the cavity, and from a top view, the multiple burners are evenly distributed around the circumference, and the flame injection direction of the outlet ends is eccentrically arranged with respect to the central axis; and the multiple burners are arranged in a spiral ascending pattern around the central axis.

[0006] As a further optimization, the refractory material includes mullite corundum refractory material, thermal insulation cotton, and glass fiber needle-punched blanket fixed in sequence from the inside to the outside; a steel shell is fixed to the outside of the glass fiber needle-punched blanket; the burner is fixed to the steel shell, and its outlet end passes through the glass fiber needle-punched blanket and thermal insulation cotton, and is inserted into a preset socket in the mullite corundum refractory material.

[0007] As a further optimization, the cylinder is a conical cylinder; the small end of the conical cylinder faces upward.

[0008] As a further optimization, the number of the burners is four to six.

[0009] As a further optimization, a steel frame is fixedly connected to the outer side of the steel shell.

[0010] Compared with the prior art, the beneficial effects of the utility model are:

[0011] (1) Reasonable design avoids counter-burning and local high-temperature areas, expands the flame boundary almost to the entire combustion chamber, strengthens furnace gas convection, reduces dead corners in the furnace, makes the furnace temperature more uniform, and ensures heating efficiency.

[0012] (2) Uniform furnace temperature allows the smelting raw materials to be heated evenly, reducing local high temperatures and the volatilization and oxidation of the smelting raw materials.

[0013] (3) The refractory materials constituting the furnace chamber are heated evenly and the refractory materials are always guaranteed to operate within a reasonable temperature range, thereby extending the service life of the refractory materials of the furnace.

[0014] (4) The device has a simple structure, is easy to manufacture and has low cost.

[0015] In short, the device can improve the heating uniformity of the gas furnace, achieve good heating effect and high heating efficiency, and extend the service life of the furnace refractory material. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the structure of Example 1 of the utility model;

[0017] Figure 2 for Figure 1 Top view of the .

[0018] The corresponding relationship between the technical features and the reference numerals in the figure is: steel shell 1; glass fiber needle-punched blanket 2; thermal insulation cotton 3; mullite corundum refractory material 4; burner 5. DETAILED DESCRIPTION

[0019] The following is a clear and complete description of the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings of the present invention. Obviously, the described embodiments are only a part of the preferred embodiments of the present invention, rather than all the embodiments. It should be understood by those skilled in the art that these implementation methods are only used to explain the technical principles of the present invention and are not intended to limit the scope of protection of the present invention.

[0020] Example 1: Please refer to Figure 1-2 ;

[0021] The utility model provides the following technical solutions: a combustion chamber structure of a gas melting furnace, comprising a cavity formed by wrapping a refractory material; the cavity is cylindrical with a vertical central axis; at least four burners 5 are inserted into the refractory material; the outlet end of the burner 5 is connected to the cavity, and from a top view, the multiple burners 5 are evenly distributed around the circumference, and the flame injection direction of the outlet end is eccentrically arranged with respect to the central axis; and the multiple burners 5 are arranged in a spiral ascending manner around the central axis.

[0022] The working principle includes: multiple burners 5 are arranged eccentrically with the central axis, and are arranged in a spiral ascending manner in the height direction to form a spiral ascending evenly spaced arrangement, so as to avoid two burners 5 burning against each other, avoid local high temperature areas, and make heating more uniform; the flame boundary is expanded almost to the entire combustion chamber, and the spiral ascending arrangement strengthens the furnace gas convection, reduces the dead angle in the furnace, and makes the furnace temperature more uniform. Furthermore, while ensuring the heating effect and efficiency, the injection temperature of each burner 5 can be relatively reduced, protecting the heat-resistant material and extending the life of the refractory material.

[0023] The preferred embodiment of the refractory material is that the refractory material includes a mullite corundum refractory material 4, a heat-insulating cotton 3, and a glass fiber needle-punched blanket 2 which are fixedly connected from the inside to the outside in sequence; the outer side of the glass fiber needle-punched blanket 2 is fixedly connected with a steel shell 1; the burner 5 is fixedly connected to the steel shell 1, and its outlet end passes through the glass fiber needle-punched blanket 2 and the heat-insulating cotton 3, and is plugged into the preset plug hole of the mullite corundum refractory material 4. Among them, the refractory material has three layers in total, the outer glass fiber needle-punched blanket 2 and the heat-insulating cotton 3 and the inner mullite corundum refractory material 4, so that the high temperature inside the furnace is not easily transmitted to the outside of the furnace; the outer soft material plays a buffering role to avoid the interaction between the two caused by the different expansion degrees of the refractory material and the outer steel shell 1 due to the high temperature, resulting in cracking of the refractory material and deformation of the furnace shell. The mullite corundum refractory material 4 is further protected and the life of the refractory material is extended.

[0024] Preferably, the cylinder is a conical cylinder, and the small end of the conical cylinder faces upward. The bell mouth with a small upper opening and a large lower opening prevents the smelting raw materials from colliding with the burner 5 during the falling process, and the bell mouth design of the installation cavity of the burner 5 prevents the smelting raw materials from blocking the burner 5 mouth.

[0025] The more the burners 5 are, the better the heating uniformity is. However, in order to reduce the cost, the number of the burners 5 is preferably four to six. This embodiment takes four burners 5 as an example.

[0026] In order to further improve the structural strength, a steel frame is fixedly connected to the outer side of the steel shell 1, so that the steel shell 1 is more solid and durable.

[0027] The advantages of this embodiment are as follows:

[0028] (1) Reasonable design avoids counter-burning and local high-temperature areas, expands the flame boundary to almost the entire combustion chamber, strengthens furnace gas convection, reduces dead corners in the furnace, makes the furnace temperature more uniform, and ensures heating efficiency.

[0029] (2) Uniform furnace temperature allows the smelting raw materials to be heated evenly, reducing local high temperatures and the volatilization and oxidation of the smelting raw materials.

[0030] (3) The refractory materials constituting the furnace chamber are heated evenly and the refractory materials are always guaranteed to operate within a reasonable temperature range, thereby extending the service life of the refractory materials of the furnace.

[0031] (4) The device has a simple structure, is easy to manufacture and has low cost.

[0032] In short, the device can improve the heating uniformity of the gas furnace, achieve good heating effect and high heating efficiency, and extend the service life of the furnace refractory material.

[0033] The parts not described in detail in this utility model are prior art; for ordinary technicians in this field, the technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, all possible combinations of the technical features in the above-mentioned embodiments are not described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification. The scope of this utility model is defined by the attached claims and their equivalents.

Claims

1. A combustion chamber structure of a gas-fired furnace, comprising a cavity formed by wrapping a refractory material; characterized in that: The cavity is cylindrical with a vertical central axis; At least four burners (5) are inserted into the refractory material; the outlet end of the burner (5) is connected to the cavity, and the plurality of burners (5) are arranged in a spiral ascending pattern around the central axis; Seen from a top view, the plurality of burners (5) are evenly distributed around the circumference, and the flame spraying direction of the outlet end is eccentrically arranged with respect to the central axis.

2. The combustion chamber structure of the gas melting furnace according to claim 1, characterized in that: The refractory material comprises a mullite corundum refractory material (4), a thermal insulation cotton (3), and a glass fiber needle-punched blanket (2) which are sequentially connected from the inside to the outside; The outer side of the glass fiber needle-punched blanket (2) is fixedly connected with a steel shell (1); The burner (5) is fixedly connected to the steel shell (1), and its outlet end passes through the glass fiber needle-punched blanket (2) and the thermal insulation cotton (3), and is then plugged into a preset plug hole of the mullite corundum refractory material (4).

3. The combustion chamber structure of the gas-fired melting furnace according to claim 1, characterized in that: The cylinder is a conical cylinder, and the small end of the conical cylinder faces upward.

4. The combustion chamber structure of the gas-fired melting furnace according to claim 1, characterized in that: The number of the burners (5) is four to six.

5. The combustion chamber structure of the gas-fired melting furnace according to claim 2, characterized in that: The outer side of the steel shell (1) is fixedly connected with a steel frame.

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