Heating device for improving temperature uniformity of gas heating furnace

Abstract

The invention relates to a heating device for improving temperature uniformity of a gas heating furnace. The heating device is arranged in the heating furnace, a hearth is arranged in the heating furnace, and the heating device is arranged above the hearth; the heating device comprises a horizontally-arranged heat-resisting base plate, the heat-resisting base plate is in an L shape, a gas flow channel is formed in the vertical section of the heat-resisting base plate, one end of the gas flow channel is connected with a gas inlet header pipe, the other end of the gas flow channel is a closed end, and the gas inlet header pipe is connected with a gas header pipe. A plurality of vertically downward radiation fins are arranged on the lower surface of the horizontal section of the heat-resistant base plate and are sequentially arranged in the length direction of the hearth; a plurality of fuel gas spraying holes for spraying fuel gas downwards are formed in the fuel gas flow channel, and the fuel gas spraying holes are formed above gaps between the adjacent radiation fins. By arranging the heating device on the furnace top, heat flow in the furnace can be effectively homogenized, temperature fluctuation is reduced, and temperature uniformity is improved.

Description

Technical Field

[0001] This invention relates to the field of industrial heat treatment equipment technology, and more particularly to a heating device for improving the temperature uniformity of a gas-fired heating furnace. Background Technology

[0002] Gas-fired heating furnaces are widely used heat treatment equipment in industries such as metallurgy, ceramics, and chemicals. Traditional gas-fired heating furnaces typically use burners arranged on the side walls for heating. This heating method easily leads to uneven temperature distribution within the furnace, creating significant temperature gradients. Poor temperature uniformity within the furnace directly affects the heat treatment quality of products, resulting in inconsistent product performance, decreased yield, and increased energy consumption. Although existing technologies have attempted to improve uniformity by optimizing burner angles and adding circulating fans, the effects are limited, and the structures are complex and costly. Summary of the Invention

[0003] The purpose of this invention is to provide a heating device that improves the temperature uniformity of a gas-fired heating furnace, thereby solving the problems in the prior art.

[0004] The technical solution of the present invention is: a heating device for improving the temperature uniformity of a gas-fired heating furnace, wherein the heating device is disposed inside the heating furnace, the heating furnace is provided with a furnace chamber, and the heating device is disposed above the furnace chamber; The heating device includes a horizontally arranged heat-resistant base plate, which is L-shaped. A gas flow channel is provided on the vertical section of the heat-resistant base plate. One end of the gas flow channel is connected to the main air inlet pipe, and the other end is a closed end. The main air inlet pipe is connected to the main gas pipe. The lower surface of the horizontal section of the heat-resistant substrate is provided with multiple vertically downward radiating fins, which are arranged sequentially along the length of the furnace chamber. The gas flow channel is provided with multiple downward-spraying gas nozzles, which are located above the gaps between adjacent radiating fins.

[0005] Preferably, the axis of the gas nozzle forms an angle of 0-30° with the vertical direction.

[0006] Preferably, the horizontal section of the heat-resistant substrate is provided with multiple auxiliary air inlets, and each auxiliary air inlet corresponds to a gas injection hole.

[0007] Preferably, the plurality of radiating fins are arranged at equal intervals along the length of the furnace.

[0008] The beneficial effects of this invention are: the device can be directly installed on the top of an existing gas-fired heating furnace without requiring large-scale modifications to the furnace structure, resulting in low modification costs and strong applicability; it eliminates local hot spots and temperature dead zones caused by side-wall burners, significantly reducing the temperature difference in the cross-section and length of the furnace chamber; and it promotes complete combustion of gas and reduces pollutant emissions. Attached Figure Description

[0009] Figure 1 This is a schematic diagram of the structure of the present invention.

[0010] Figure 2 This is a schematic diagram of the heating device.

[0011] In the diagram, 1 is the heating furnace, 2 is the furnace chamber, 3 is the heat-resistant substrate, 4 is the gas flow channel, 5 is the main air inlet pipe, 6 is the main gas pipe, 7 is the radiating fins, 8 is the gas nozzle, and 9 is the auxiliary air inlet. Detailed Implementation

[0012] A heating device for improving the temperature uniformity of a gas-fired heating furnace, wherein the heating device is disposed inside a heating furnace 1, the heating furnace 1 is provided with a furnace chamber 2, and the heating device is disposed above the furnace chamber 2; The heating device includes a horizontally arranged heat-resistant substrate 3, which is L-shaped. A gas flow channel 4 is provided on the vertical section of the heat-resistant substrate 3. One end of the gas flow channel 4 is connected to the main air inlet pipe 5, and the other end is a closed end. A main gas pipe 6 is connected to the main air inlet pipe 4. The lower surface of the horizontal section of the heat-resistant substrate 3 is provided with a plurality of vertically downward radiating fins 7, which are arranged sequentially along the length of the furnace chamber 2. The gas flow channel 4 is provided with a plurality of downward-spraying gas nozzles 8, which are located above the gap between adjacent radiating fins 7.

[0013] The axis of the gas nozzle 8 forms an angle of 0-30° with the vertical direction.

[0014] The heat-resistant substrate 3 has multiple auxiliary air inlets 9 on its horizontal section, and each auxiliary air inlet 9 corresponds to a gas injection hole 8.

[0015] The plurality of radiating fins 7 are arranged at equal intervals along the length of the furnace.

[0016] The working principle of this invention is as follows: High-temperature mixed gas enters the gas flow channel 4 within the heat-resistant substrate 3 from the main inlet pipe 5 and the main gas pipe 6, and is then ejected downwards through the gas nozzle 8 for combustion. The heat generated by combustion is directly transferred to the radiant fins 7, causing them to rapidly heat up to an incandescent state. The incandescent radiant fins 7 release uniform and stable heat into the furnace chamber 2 below and to the sides through thermal radiation, guiding the hot airflow to form a more uniform distribution between the radiant fins 7. Compared with traditional direct impact heating by sidewall flames, this invention achieves radiative heating of the furnace chamber 2 by the array of radiant fins 7, significantly reducing the formation of local high-temperature zones, thereby greatly improving the temperature uniformity of the entire furnace working area.

[0017] In the description of this invention, it should be understood that the indicated orientation or positional relationship is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this invention and simplifying the description, and is not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0018] In this invention, unless otherwise explicitly specified and limited, for example, it can be a fixed connection, a detachable connection, or an integral part; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two elements or an interaction between two elements. Unless otherwise explicitly limited, those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0019] All standard parts used in this invention can be purchased from the market, and irregular parts can be customized according to the description and drawings.

[0020] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A heating device for improving the temperature uniformity of a gas-fired furnace, characterized in that: The heating device is installed inside the heating furnace (1), the heating furnace (1) is provided with a furnace chamber (2), and the heating device is installed above the furnace chamber (2); The heating device includes a horizontally arranged heat-resistant substrate (3), which is L-shaped. A gas flow channel (4) is provided on the vertical section of the heat-resistant substrate (3). One end of the gas flow channel (4) is connected to the main air inlet pipe (5), and the other end is a closed end. The main air inlet pipe (5) is connected to the main gas pipe (6). The lower surface of the horizontal section of the heat-resistant substrate (3) is provided with a plurality of vertically downward radiating fins (7), and the radiating fins (7) are arranged sequentially along the length of the furnace (2). The gas flow channel (4) is provided with a plurality of downward-spraying gas nozzles (8), which are located above the gap between adjacent radiating fins (7).

2. The heating device for improving the temperature uniformity of a gas-fired furnace according to claim 1, characterized in that: The axis of the gas nozzle (8) forms an angle of 0-30° with the vertical direction.

3. The heating device for improving the temperature uniformity of a gas-fired furnace according to claim 1, characterized in that: The heat-resistant substrate (3) has multiple auxiliary air inlets (9) on its horizontal section, and the auxiliary air inlets (9) correspond one-to-one with the gas nozzles (8).

4. The heating device for improving the temperature uniformity of a gas-fired furnace according to claim 1, characterized in that: The multiple radiating fins (7) are arranged at equal intervals along the length of the furnace (2).

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