Air heating furnace

Abstract

The utility model discloses an air heating furnace which comprises a furnace body, an air inlet, an air outlet, a drain outlet and a plurality of heating elements arranged in the furnace body, the furnace body is of a well type structure, the heating elements are U-shaped silicon carbide rods, the side walls of the U-shaped silicon carbide rods are sleeved with U-shaped silicon carbide rod protection sleeves, and the U-shaped silicon carbide rod protection sleeves are sleeved with U-shaped silicon carbide rod protection sleeves. The plurality of U-shaped silicon carbide rod protective sleeves are separated by a plurality of wind shields which are arranged up and down, the plurality of wind shields are round, and a part of the left side or the right side of each wind shield is lost to form a notch for air to pass through. According to the utility model, the structural design is reasonable, the furnace body structure is changed from a box-type structure to a well-type structure, the air is heated to flow upwards, so that the air circulation is smoother, the total heating time is shortened, the U-shaped silicon carbide rods are separated by the wind shield, and the flowing path of the air passing through the wind shield is S-shaped, so that the air can be in full contact with the plurality of U-shaped silicon carbide rods; and sufficient heating is carried out, so that the heating efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of air heating furnaces, in particular to an air heating furnace. Background Art

[0002] In the metallurgical industry, a heating furnace is a device (industrial furnace) that heats materials or workpieces (usually metals) to rolling and forging temperatures. Heating furnaces are used in many industries such as petroleum, chemical industry, metallurgy, machinery, heat treatment, surface treatment, building materials, electronics, materials, light industry, daily chemicals, and pharmaceuticals.

[0003] At present, the existing heating furnace body is usually a box-type furnace, with heating elements placed in the furnace. Air enters the furnace body horizontally from one side of the equipment, passes through the heat exchange of the heating elements, and flows out from the other side of the furnace body to achieve the purpose of heating. However, the box-type furnace is prone to poor air circulation in the furnace body, making it difficult for the air to fully contact the heating element, resulting in low heating efficiency, long heating time, and low heating temperature. For this reason, we designed an air heating furnace to solve the above problems. Utility Model Content

[0004] The utility model aims to solve the problems existing in the prior art, and proposes an air heating furnace, whose furnace body structure is changed from a box-type structure to a well-type structure. The heated air flows upward, making the air circulation smoother and shortening the overall heating time. The U-shaped silicon carbon rods are separated by wind shields, and the path of the air flowing through the baffle is S-shaped, which can make the air fully contact with a plurality of U-shaped silicon carbon rods and fully heat them, thereby increasing the heating efficiency and the heating temperature.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] An air heating furnace comprises a furnace body, an air inlet, an air outlet, a sewage outlet and a plurality of heating elements arranged in the furnace body, wherein the furnace body is a well-type structure, and the plurality of heating elements are U-shaped silicon carbon rods, and the side walls of the plurality of U-shaped silicon carbon rods are sleeved with U-shaped silicon carbon rod protection sleeves, and the plurality of U-shaped silicon carbon rod protection sleeves are separated by a plurality of wind shields arranged up and down, and the plurality of wind shields are all circular and have a part missing on the left or right side to form a gap for air to pass through, and the gaps on two adjacent wind shields up and down are on the left and right sides respectively, so that the path through which air passes is S-shaped.

[0007] Preferably, the furnace body is composed of a furnace shell, a panel, a furnace lining and a furnace core. The furnace core is arranged in the furnace lining and supported by four cross braces. The U-shaped silicon carbon rod is located in the furnace core.

[0008] Preferably, the wind shield is penetrated with circular holes matching the number of U-shaped silicon carbon rods, and the plurality of U-shaped silicon carbon rods are respectively located in the plurality of circular holes so as to separate the plurality of U-shaped silicon carbon rods.

[0009] Preferably, a protective cover is provided above the furnace body, the protective cover is mounted on the furnace body by fixing bolts, and a fixing seat is provided on the side wall of the furnace body.

[0010] Preferably, the air inlet is located below the furnace body, the air outlet is located above the furnace body, and the sewage outlet is located at the bottom of the furnace body.

[0011] Preferably, the furnace lining is made of aluminum silicate fiber.

[0012] Preferably, a first thermocouple opposite to the gas outlet is installed on the furnace body, and a second thermocouple opposite to the U-shaped silicon carbon rod is installed through the furnace body.

[0013] Compared with the prior art, the utility model has the following beneficial effects:

[0014] 1. The air heating furnace has a furnace body structure changed from a box-type structure to a well-type structure. Air is added into the furnace body through the lower air inlet. The heated air can flow upward and be discharged through the upper air outlet, making the air circulation smoother and shortening the overall heating time. The furnace lining material is aluminum silicate fiber, which has low heat loss and good energy-saving effect.

[0015] 2. In the air heating furnace, the U-shaped silicon carbon rod is placed in a U-shaped silicon carbon rod protection sleeve, and the U-shaped silicon carbon rod is separated by a plurality of wind shields arranged above and below. The air flows through the baffle in an S-shaped path, which enables the air to fully contact with the plurality of U-shaped silicon carbon rods and be fully heated, thereby increasing the heating efficiency and the heating temperature. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the main cross-sectional structure of an air heating furnace proposed by the utility model;

[0017] Figure 2 The utility model is a schematic diagram of the top view of the air heating furnace.

[0018] In the figure: 1. U-shaped silicon carbon rod; 2. panel; 3. U-shaped silicon carbon rod protection sleeve; 4. first thermocouple; 5. furnace shell; 6. cross brace; 7. air outlet; 8. wind shield; 9. furnace lining; 10. furnace core; 11. air inlet; 12. sewage outlet; 13. second thermocouple; 14. protective cover; 15. fixing bolt; 16. fixing seat. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0020] Reference Figure 1-Figure 2 An air heating furnace comprises a furnace body, an air inlet 11, an air outlet 7, a sewage outlet 12 and a plurality of heating elements arranged in the furnace body. The furnace body is composed of a furnace shell 5, a panel 2, a furnace lining 9 and a furnace 10. The material of the furnace lining 9 is aluminum silicate fiber, which has low heat loss and good energy-saving effect. The furnace 10 is arranged in the furnace lining 9, and the furnace 10 is supported by four cross braces 6. A U-shaped silicon carbon rod 1 is located in the furnace 10. The furnace body is a well structure. The plurality of heating elements are all U-shaped silicon carbon rods 1. The side walls of the plurality of U-shaped silicon carbon rods 1 are all provided with U-shaped silicon carbon rod protection sleeves 3. The U-shaped silicon carbon rod protection sleeves 3 can It plays a protective role on the U-shaped silicon carbon rod 1, prevents dust in the air from adhering to the U-shaped silicon carbon rod 1, and does not affect the heating effect of the U-shaped silicon carbon rod 1 on the air. Multiple U-shaped silicon carbon rod protection sleeves 3 are separated by multiple windshields 8 arranged up and down. The windshield 8 is penetrated with round holes that match the number of U-shaped silicon carbon rods 1. Multiple U-shaped silicon carbon rods 1 are respectively located in the multiple round holes to separate the multiple U-shaped silicon carbon rods 1. The windshield 8 can not only isolate the U-shaped silicon carbon rod protection sleeves 3, but also prevent the gas from passing through the heating element quickly, which is conducive to sufficient heating of the air;

[0021] The plurality of windshields 8 are all circular and have a part missing on the left or right side to form a gap for air to pass through. The gaps on the two adjacent windshields 8 above and below are on the left and right sides respectively, so that the path through which the air passes is S-shaped. The gas moves in an S-shaped manner between the upper and lower windshields 8 and can be fully heated.

[0022] The air inlet 11 is located at the bottom of the furnace body, and the air outlet 7 is located at the top of the furnace body. After the air enters the furnace body through the air inlet 11, it is heated by the U-shaped silicon carbon rod 1. The air rises due to the heat and is discharged through the air outlet 7. The sewage outlet 12 is located at the bottom of the furnace body.

[0023] A first thermocouple 4 opposite to the air outlet 7 is installed on the furnace body, and the first thermocouple 4 can measure the temperature of the air discharged through the air outlet 7. A second thermocouple 13 opposite to the U-shaped silicon carbon rod 1 is installed through the furnace body, and the second thermocouple 13 can measure the temperature of the U-shaped silicon carbon rod 1.

[0024] A protective cover 14 is provided above the furnace body and is mounted on the furnace body by fixing bolts 15 . The protective cover 14 can protect the U-shaped silicon carbon rod 1 and the part of the second thermocouple 13 extending above the furnace body. A fixing seat 16 is provided on the side wall of the furnace body.

[0025] The functional principle of the utility model can be explained through the following operation modes:

[0026] In the utility model, when the air heating furnace is in use, the furnace body is a well-type structure, and air is added into the furnace body through the air inlet 11. The air is heated by multiple U-shaped silicon carbon rods 1, and the heated air flows upward. The wind shield 8 can prevent the gas from quickly passing through the U-shaped silicon carbon rods 1, and the air flows through the gaps on the wind shield 8. The gaps on the upper and lower layers of the wind shield 8 are on the left and right sides respectively, so that the path of the air is S-shaped, so that the air can fully contact the U-shaped silicon carbon rods 1 for sufficient heating, and the furnace lining 9 material is aluminum silicate fiber, with low heat loss and good energy-saving effect. The fully heated air is discharged through the outlet 7.

[0027] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An air heating furnace, comprising a furnace body, an air inlet (11), an air outlet (7), a sewage outlet (12) and a plurality of heating elements arranged in the furnace body, characterized in that: The furnace body is a well-type structure, and the plurality of heating elements are all U-shaped silicon carbon rods (1). The side walls of the plurality of U-shaped silicon carbon rods (1) are all sleeved with U-shaped silicon carbon rod protection sleeves (3). The plurality of U-shaped silicon carbon rod protection sleeves (3) are separated by a plurality of wind shields (8) arranged up and down. The plurality of wind shields (8) are all circular and have a part missing on the left or right side to form a gap for air to pass through. The gaps on the two adjacent wind shields (8) are on the left and right sides respectively, so that the path through which the air passes is S-shaped.

2. The air heating furnace according to claim 1, characterized in that: The furnace body is composed of a furnace shell (5), a panel (2), a furnace lining (9) and a furnace core (10); the furnace core (10) is arranged in the furnace lining (9) and supported by four cross braces (6); and the U-shaped silicon carbon rod (1) is located in the furnace core (10).

3. The air heating furnace according to claim 1, characterized in that: The windshield plate (8) is provided with circular holes matching the number of the U-shaped silicon carbon rods (1), and the plurality of U-shaped silicon carbon rods (1) are respectively located in the plurality of circular holes so as to separate the plurality of U-shaped silicon carbon rods (1).

4. The air heating furnace according to claim 1, characterized in that: A protective cover (14) is provided above the furnace body. The protective cover (14) is mounted on the furnace body via fixing bolts (15). A fixing seat (16) is provided on the side wall of the furnace body.

5. The air heating furnace according to claim 1, characterized in that: The air inlet (11) is located below the furnace body, the air outlet (7) is located above the furnace body, and the sewage outlet (12) is located at the bottom of the furnace body.

6. The air heating furnace according to claim 2, characterized in that: The material of the furnace lining (9) is aluminum silicate fiber.

7. The air heating furnace according to claim 1, characterized in that: A first thermocouple (4) opposite to the gas outlet (7) is installed on the furnace body, and a second thermocouple (13) opposite to the U-shaped silicon carbon rod (1) is installed through the furnace body.

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