A heating furnace for directional heat transfer

Abstract

The application provides a heating furnace for directional heat transfer, and belongs to the technical field of heating furnace equipment. The heating furnace comprises a furnace top and side walls vertically arranged on both sides of the furnace top, respectively. The first heating element is arranged on the furnace top. The side wall comprises an upper side wall and a lower side wall arranged on the lower side of the upper side wall. The abutting position of the upper side wall and the lower side wall is used for conveying workpieces. The second heating element is arranged on the upper side wall and the lower side wall. One end of the second heating element is provided with an opening, and the opening end faces the workpiece. The scheme provided by the application can make the opening of the heating element in the heating furnace face the workpiece processing area, thereby increasing the inner surface area of the furnace and improving the heat exchange rate, so as to reduce fuel consumption.

Description

Technical Field

[0001] This utility model belongs to the technical field of heating furnace equipment, and in particular relates to a heating furnace with directional heat transfer. Background Technology

[0002] Based on the mathematical model of heat transfer in a fuel furnace, numerous heating elements are installed in, such as... Figure 2 The furnace top 1 shown can both increase the heat transfer area of ​​the furnace and allow for the... Figure 1 The disordered diffuse heat rays on the furnace top 1 of the heating furnace shown are ordered and controlled, so that the diffuse heat rays are controlled as follows: Figure 2 The furnace top 1 of the heating furnace shown has directional heat rays at the top, so that the directional heat rays can directly reach the heated workpiece 4, thereby increasing the heat ray delivery rate and achieving energy saving and emission reduction.

[0003] However, due to the scouring effect of hot airflow inside the heating furnace and the brittle nature of the refractory material of the heat transfer element matrix, conventional heating elements with symmetrical mounting surfaces inside the heating furnace have a limited form and are often only installed on the furnace top in practical applications. Figure 2 As shown, the disordered diffuse heat radiation above the inner fireplace of the heating furnace can only be directionally directed through the opening direction of the heating element to the heated workpiece 4. Therefore, the heat loss from the disordered diffuse heat radiation on the side wall is still relatively large, the heat radiation arrival rate is low, and the improvement of energy saving rate is limited.

[0004] Secondly, even if conventional heating elements are installed on the side wall of the heating furnace, because the opening direction of the heating elements is parallel to the workpiece being heated, most of the disordered diffuse heat radiation from the side wall is directionally controlled to the parallel direction above the workpiece. The heating capacity of the lower part of the heating furnace is still insufficient, the heat rays reaching the workpiece are very low, and the temperature difference between the upper and lower surfaces is still too large. It is very difficult to increase the heat received by the workpiece by more than 10% within a unit time period, making it extremely difficult to further improve the energy saving rate. Utility Model Content

[0005] To address the shortcomings of the existing technology, this utility model provides a directional heat transfer furnace, in which the openings of the heating elements inside the furnace face the workpiece processing area, which not only increases the surface area inside the furnace but also improves the heat exchange rate, thereby reducing fuel consumption.

[0006] In order to achieve the purpose of this utility model, the following solution is proposed:

[0007] A directional heat transfer heating furnace includes a furnace top and side walls vertically arranged on both sides of the furnace top. A first heating element is covered on the furnace top. The side walls include an upper side wall and a lower side wall located below the upper side wall. The plane where the upper and lower side walls meet is used for conveying workpieces. A second heating element is arrayed on both the upper and lower side walls. One end of the second heating element is provided with an opening, and the opening end faces the workpiece.

[0008] Furthermore, the first heating element has an inverted truncated cone structure, with a mounting surface at its large end and a heat transfer cavity recessed inward at its small end, and the mounting surface is connected to the furnace top.

[0009] Furthermore, the heat transfer cavity has a circular truncated cone cavity structure, and the lower end of the cavity structure is connected to the small end of the first heating element.

[0010] Furthermore, the second heating element has an inverted frustum structure, with a mounting surface at its large end. The mounting surface is inclined and has a predetermined angle α with the large end of the second heating element. The mounting surface is connected to the corresponding upper and lower side walls respectively. The small end of the second heating element is recessed inward to provide a heat transfer cavity.

[0011] Furthermore, the included angle α is 9° or 12°.

[0012] Furthermore, the second heating elements on the upper and lower sidewalls are symmetrically arranged and have the same number.

[0013] The beneficial effects of this utility model are as follows:

[0014] A first heat transfer element is installed on the top of the heating furnace, and a second heating element with a certain inclination angle at the rear end is provided on the side wall. This not only increases the heat transfer area of ​​the furnace chamber, but also directs the diffuse heat rays in the heating furnace into directional heat rays to the workpiece being processed. This increases the heat received by the workpiece by more than 15% per unit time period, enhances the heating rate and heat transfer intensity, reduces fuel consumption, and achieves energy conservation and emission reduction. Attached Figure Description

[0015] The accompanying drawings described herein are merely illustrative of selected embodiments, not all possible implementations, and are not intended to limit the scope of this invention.

[0016] Figure 1 The diagram shows the diffuse heat radiation inside the furnace when no heating element is installed, as well as the heat loss outside the furnace.

[0017] Figure 2 The amount of heat loss from the outer wall of the furnace after the diffuse radiation at the top of the furnace is directionally controlled.

[0018] Figure 3 A cross-sectional view of the internal structure of this application is shown.

[0019] Figure 4 A schematic diagram of the structure of the first heating element of this application is shown.

[0020] Figure 5 A schematic diagram of the structure of the second heating element of this application is shown.

[0021] The markings in the diagram are: furnace top-1, side wall-2, upper side wall-21, lower side wall-22, first heating element-3, mounting surface-31, heat transfer cavity-32, workpiece-4, second heating element-5, and second mounting surface-51. Detailed Implementation

[0022] To make the objectives, technical solutions and advantages of the present utility model clearer, the implementation methods of the present utility model will be described in detail below with reference to the accompanying drawings. However, the embodiments described in the present utility model are only some embodiments of the present utility model, and not all embodiments.

[0023] like Figures 3-5 As shown, this embodiment provides a directional heat transfer heating furnace for heating materials such as… Figure 1 The heating furnace shown is directionally controlled to reduce heat loss from the outer wall of the furnace. The arrows inside the furnace represent diffuse heat rays, and the arrows outside the furnace represent heat loss. The heating furnace of this application includes a furnace top 1 and side walls 2 vertically arranged on both sides of the furnace top 1.

[0024] Specifically, such as Figure 3 As shown, a first heating element 3 is provided on the furnace top 1, and the first heating element 3 is arranged sequentially on the furnace top 1.

[0025] Sidewall 2 includes an upper sidewall 21 and a lower sidewall 22 located below the upper sidewall 21. The plane where the upper sidewall 21 and the lower sidewall 22 meet is used for conveying the workpiece 4. The lower end of the first heating element 3 has an opening facing the workpiece 4, for conveying the workpiece 4. Figure 1 The diffuse radiation on the furnace top 1 shown is directionally controlled as follows: Figures 2-3 The directional heat rays on the furnace top 1, that is Figures 2-3 The vertical downward arrow at the top of the furnace top 1 represents directional heat rays, which directly reach the workpiece 4, thereby reducing the heat loss rate of the furnace top 1 and thus achieving the purpose of energy saving.

[0026] like Figure 3 As shown, second heating elements 5 are arrayed on both the upper sidewall 21 and the lower sidewall 22. One end of each second heating element 5 has an opening, and the other end is connected to the corresponding upper sidewall 21 and lower sidewall 22, with the opening facing the workpiece 4, thereby heating the workpiece 4. Figure 2 The diffuse radiation rays indicated by the arrows on both sides of the heating furnace are directionally controlled as follows: Figure 3The directional heat rays indicated by the arrows on the side walls of the heating furnace directly act on the upper and lower surfaces of the workpiece 4, thereby making the workpiece 4 heated evenly and reducing the temperature difference between the upper and lower surfaces of the workpiece 4. The second heating element 5 is installed on the side wall 2, increasing the thickness of the side wall 2, which also reduces the heat loss rate of the heat loss rays on the side wall 2, thereby reducing the heat loss of the outer wall of the heating furnace and further achieving the purpose of energy saving.

[0027] In addition, the installation of the first heating element 3 and the second heating element 5 increases the surface area of ​​the inner wall of the heating furnace, thereby increasing the heat received by the workpiece 4 per unit time and further improving the energy saving rate.

[0028] Specifically, such as Figures 3-4 As shown, the first heating element 3 has an inverted frustum-shaped structure, with its large end being the mounting surface 31, which faces the furnace top 1 and is connected to it. The small end of the first heating element 3 is vertically oriented, and a heat transfer cavity 32 is recessed vertically into the first heating element 3 along the small end. The heat transfer cavity 32 has a truncated frustum-shaped cavity structure, and the lower end of the cavity structure is connected to the small end of the first heating element 3. Thus, the diffuse heat rays from the furnace top 1 are directed and modulated into directional heat rays through the heat transfer cavity 32 of the first heating element 3, thereby allowing the directional heat rays to directly act on the top surface of the workpiece 4.

[0029] Specifically, such as Figure 3 , Figure 5 As shown, the second heating element 5 has an inverted frustum structure, with a second mounting surface 51 at its large end. The second mounting surface 51 and the large end of the second heating element 5 have a predetermined angle α, that is, the second mounting surface 51 is an inclined surface and tilts towards the small end of the second heating element 5. The second mounting surface 51 is used to connect with the side wall 2. The small end of the second heating element 5 is recessed inward to provide a heat transfer cavity 32, the structure of which is the same as the structure of the heat transfer cavity 32 of the first heating element 3.

[0030] The small end of the second heating element 5 installed on the upper side wall 21 is facing downwards, that is, the opening of the heat transfer cavity 32 of the second heating element 5 installed on the upper side wall 21 faces the upper surface of the workpiece 4, and the lower end of the second heating element 5 installed on the lower side wall 22 is facing upwards, that is, the opening of the heat transfer cavity 32 of the second heating element 5 installed on the lower side wall 22 faces the lower surface of the workpiece 4. The second heating elements 5 on the upper side wall 21 and the lower side wall 22 are symmetrically arranged and have the same number, so as to achieve the purpose of uniform heating of the upper and lower surfaces of the workpiece 4.

[0031] Specifically, the angle α between the second mounting surface 51 and the large end of the second heating element 5 is 9° or 12°. When in use, it can be selected and adjusted according to the thickness of the workpiece.

[0032] The above description is merely a preferred embodiment of this utility model and does not imply its uniqueness or limitation. Those skilled in the art should understand that various changes or equivalent substitutions made to this utility model without departing from its scope are all within the protection scope of this utility model.

Claims

1. A directional heat transfer heating furnace, comprising a furnace top (1) and side walls (2) respectively vertically disposed on both sides of the furnace top (1), wherein a first heating element (3) is covered on the furnace top (1) and has an opening at its lower end, characterized in that, The side wall (2) includes an upper side wall (21) and a lower side wall (22) located below the upper side wall (21). The plane where the upper side wall (21) and the lower side wall (22) meet is used to transport the workpiece (4). A second heating element (5) is arrayed on both the upper side wall (21) and the lower side wall (22). One end of the second heating element (5) is provided with an opening, and the opening end faces the workpiece (4).

2. The directional heat transfer heating furnace according to claim 1, characterized in that, The first heating element (3) has an inverted truncated cone structure, with a mounting surface (31) at its large end and a heat transfer cavity (32) recessed inward at its small end. The mounting surface (31) is connected to the furnace top (1).

3. The directional heat transfer heating furnace according to claim 2, characterized in that, The heat transfer cavity (32) has a circular truncated cone cavity structure, and the lower end of the cavity structure is connected to the small end of the first heating element (3).

4. The directional heat transfer heating furnace according to claim 1, characterized in that, The second heating element (5) has an inverted truncated cone structure. Its large end is provided with a second mounting surface (51), and the second mounting surface (51) is an inclined surface. The inclined surface and the large end of the second heating element (5) have a predetermined angle α. The second mounting surface (51) is connected to the corresponding upper side wall (21) and lower side wall (22) respectively. The small end of the second heating element (5) is recessed inward and provided with a heat transfer cavity (32).

5. The directional heat transfer heating furnace according to claim 4, characterized in that, The included angle α is 9° or 12°.

6. The directional heat transfer heating furnace according to claim 4, characterized in that, The second heating elements (5) on the upper sidewall (21) and the lower sidewall (22) are symmetrically arranged and have the same number.

Images