Vertical mesh belt furnace

Abstract

The invention relates to the technical field of heat treatment equipment, and discloses a vertical mesh belt furnace which comprises a hearth body (1). The heating plate (2) is fixed in the hearth main body; the first conveying mechanism (3) comprises multiple layers of forward conveying sections (311) which are arranged up and down, the forward conveying sections can convey materials in the forward direction, and the multiple layers of forward conveying sections are in synchronous transmission; the second conveying mechanism (4) comprises multiple layers of reverse conveying sections (411) which are arranged up and down, the reverse conveying sections can convey materials in the reverse direction, and the multiple layers of reverse conveying sections are in synchronous transmission; wherein the forward conveying sections and the reverse conveying sections are arranged in an up-and-down staggered mode, and the feeding end of the conveying section on the lower layer receives materials falling from the discharging end of the conveying section on the upper layer. According to the vertical mesh belt furnace, the size and the occupied area of the mesh belt furnace can be reduced, and the energy utilization rate is increased.

Description

Technical Field

[0001] The invention relates to the technical field of heat treatment equipment, and in particular to a vertical mesh belt furnace. Background Art

[0002] The mesh belt furnace is an industrial roasting furnace that uses a mesh belt to carry materials and continuously transport them in the furnace for heat treatment. It is mainly used for sintering powder metallurgy products, reducing metal powders, heat treatment of electronic products, roasting of catalysts and adsorbent materials, etc. At present, the commonly used mesh belt furnaces are horizontal mesh belt furnaces with tunnel kiln structures. The materials are transported from the feed end to the discharge end through a horizontal single-layer mesh belt. This type of horizontal mesh belt furnace is large in size and occupies a large area. In a larger furnace, the effective heating area is only a single-layer mesh belt, and there is a large dissipation of energy, and the energy utilization rate is low. Summary of the invention

[0003] The purpose of the present invention is to solve the problems of large volume, large floor space and low energy utilization of existing mesh belt furnaces, and to provide a vertical mesh belt furnace. The vertical mesh belt furnace has multiple layers of forward conveying sections and multiple layers of reverse conveying sections arranged up and down, which can realize the reciprocating conveying of materials between the multiple layers of forward conveying sections and the multiple layers of reverse conveying sections, and can obtain a longer conveying distance and conveying time in a smaller furnace volume, and the multiple layers of forward conveying sections and the multiple layers of reverse conveying sections can be driven synchronously respectively.

[0004] In order to achieve the above object, the present invention provides a vertical mesh belt furnace, comprising:

[0005] A furnace body, wherein a feed inlet is arranged at the top of the furnace body, and a discharge outlet is arranged at the bottom of the furnace body;

[0006] A heating plate, which is arranged in the furnace body and fixed to the side wall of the furnace body, and is used to heat the material entering the furnace body;

[0007] A first conveying mechanism, the first conveying mechanism comprising multiple layers of forward conveying sections arranged up and down, the forward conveying sections being capable of conveying materials in a forward direction, and the multiple layers of forward conveying sections being synchronously driven; and

[0008] A second conveying mechanism, the second conveying mechanism includes multiple layers of reverse conveying sections arranged up and down, the reverse conveying sections can convey materials in a reverse direction, and the multiple layers of reverse conveying sections are synchronously driven;

[0009] The forward conveying section and the reverse conveying section are arranged alternately up and down, and the feeding end of the next forward conveying section or the reverse conveying section receives the materials dropped from the discharging end of the previous reverse conveying section or the forward conveying section.

[0010] Preferably, the first conveying mechanism includes a first serpentine mesh belt, a plurality of first rollers and a first connecting portion, the first serpentine mesh belt passes around the plurality of first rollers to form a multi-layer forward conveying section, and the first connecting portion connects the two ends of the first serpentine mesh belt; and / or, the second conveying mechanism includes a second serpentine mesh belt, a plurality of second rollers and a second connecting portion, the second serpentine mesh belt passes around the plurality of second rollers to form a multi-layer reverse conveying section, and the second connecting portion connects the two ends of the second serpentine mesh belt.

[0011] Preferably, the first connecting portion comprises a first turning roller and a first connecting mesh belt passing around the first turning roller; and / or the second connecting portion comprises a second turning roller and a second connecting mesh belt passing around the second turning roller.

[0012] Preferably, the first steering roller and one of the multiple first rollers are the first driving roller, and the rest are driven rollers, and the first driving roller can drive the forward conveying section to convey materials in the forward direction; and / or, the second steering roller and one of the multiple second rollers are the second driving roller, and the rest are driven rollers, and the second driving roller can drive the reverse conveying section to convey materials in the reverse direction.

[0013] Preferably, an air inlet and an exhaust gas outlet are also provided on the furnace body. The air inlet is provided at the bottom of the furnace body or the lower part of the side wall, and the exhaust gas outlet is provided at the top of the furnace body or the upper part of the side wall.

[0014] Preferably, the ratio of the radius of the first roller to that of the second roller is 2:1-3:1.

[0015] Preferably, the radius of the first roller is 10 cm-15 cm, and the radius of the second roller is 5 cm-8 cm.

[0016] Preferably, a plurality of heating plates are provided, and the plurality of heating plates are arranged at intervals along the height direction of the furnace body.

[0017] Preferably, at least one heating plate is arranged between every two adjacent forward conveying sections.

[0018] Preferably, the heating plate comprises an electric heating plate.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] (1) The vertical mesh belt furnace comprises a plurality of forward conveying sections and a plurality of reverse conveying sections arranged vertically, which can realize reciprocating conveyance of materials between the plurality of forward conveying sections and the plurality of reverse conveying sections, and can obtain a longer conveying distance and conveying time in a smaller furnace volume, which not only effectively reduces the volume and floor space of the mesh belt furnace, but also makes the vertical mesh belt furnace easier to heat, and only requires less energy consumption to fully heat the reciprocatingly conveyed materials, thereby improving energy utilization;

[0021] (2) The material will experience multiple turns during the reciprocating conveying process, which improves the drying or roasting efficiency;

[0022] (3) The multi-layer forward conveying section and the multi-layer reverse conveying section can be driven synchronously, which can avoid the accumulation of materials during the conveying process and ensure that the materials are evenly heated during the entire conveying process;

[0023] (4) Only one driving roller is required to realize synchronous transmission of multiple layers of forward conveying sections, and only one driving roller is required to realize synchronous transmission of multiple layers of reverse conveying sections. Therefore, the entire vertical mesh belt furnace only needs to install two driving devices, such as two driving motors. The device structure is simple, which avoids the complex device structure, high power cost and sealing problems caused by the increase in the number of motors, and the control process is simple. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 is a cross-sectional view of a vertical mesh belt furnace in one embodiment;

[0025] Figure 2 is a cross-sectional view of a first conveying mechanism in one embodiment;

[0026] Figure 3 is a cross-sectional view of a second conveying mechanism in one embodiment;

[0027] The reference numerals are described as follows:

[0028] 1-furnace body; 11-feed port; 12-discharge port; 13-air inlet; 14-exhaust outlet; 2-heating plate; 3-first conveying mechanism; 31-first serpentine mesh belt; 311-forward conveying section; 32-first roller; 33-first connecting part; 331-first turning roller; 332-first connecting mesh belt; 4-second conveying mechanism; 41-second serpentine mesh belt; 411-reverse conveying section; 42-second roller; 43-second connecting part; 431-second turning roller; 432-second connecting mesh belt; 5-material. DETAILED DESCRIPTION

[0029] The specific implementation of the present invention is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described here is only used to illustrate and explain the present invention, and is not used to limit the present invention.

[0030] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "set", "install", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0031] In the embodiments of the present invention, unless otherwise specified, directional words such as "up, down, top, bottom" are usually used to describe the relative position of components in the directions shown in the drawings or in the vertical, perpendicular or gravity directions. They are only for the convenience of simplifying the description, and do not indicate or imply that the components or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0032] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of the features.

[0033] Reference Figure 1-Figure 3 , a vertical mesh belt furnace provided in this embodiment includes:

[0034] A furnace body 1, a feed port 11 is provided at the top of the furnace body 1, and a discharge port 12 is provided at the bottom of the furnace body 1;

[0035] A heating plate 2, which is disposed in the furnace body 1 and fixed to the side wall of the furnace body 1, and is used to heat the material 5 entering the furnace body 1;

[0036] A first conveying mechanism 3, the first conveying mechanism 3 comprises a plurality of forward conveying sections 311 arranged vertically, the forward conveying sections 311 are capable of conveying the material 5 in a forward direction, and the plurality of forward conveying sections 311 are synchronously driven; and

[0037] The second conveying mechanism 4 includes a plurality of reverse conveying sections 411 arranged vertically, the reverse conveying sections 411 are capable of conveying the material 5 in a reverse direction, and the plurality of reverse conveying sections 411 are synchronously driven;

[0038] Among them, the forward conveying section 311 and the reverse conveying section 411 are arranged alternately up and down, and the feeding end of the next layer of forward conveying section 311 or reverse conveying section 411 receives the material 5 dropped from the discharging end of the previous layer of reverse conveying section 411 or forward conveying section 311.

[0039] The forward conveying section 311 and the reverse conveying section 411 are both arranged horizontally. The forward conveying section 311 conveys the material 5 along a first direction, and the reverse conveying section 411 conveys the material 5 along a direction opposite to the first direction. For example, Figure 2-Figure 3 As shown by the straight arrow in the figure, the positive direction refers to the horizontal right direction, and the reverse direction refers to the horizontal left direction; correspondingly, the feeding end and the discharging end of the positive conveying section 311 refer to the left end and the right end respectively, and the feeding end and the discharging end of the reverse conveying section 411 refer to the right end and the left end respectively. In addition, the directional words such as up, down, left, and right are for the attached Figure 1 In terms of the direction shown, for example, up and down arrangement refers to arrangement along the height direction of the furnace body 1 .

[0040] The working principle of the vertical mesh belt furnace includes: the material 5 enters the furnace body 1 through the feed port 11 and falls into the feed end of the first-layer forward conveying section 311, and is conveyed to the discharge end of the first-layer forward conveying section 311 through the first-layer forward conveying section 311; then, the material 5 falls to the feed end of the first-layer reverse conveying section 411 under the action of gravity, and is conveyed to the discharge end of the first-layer reverse conveying section 411 through the first-layer reverse conveying section 411 to realize reciprocating conveying; then, the material 5 falls to the feed end of the lower-layer forward conveying section 311 under the action of gravity, and after multiple reciprocating conveyings of the lower-layer forward conveying section 311 and the reverse conveying section 411, it finally falls into the discharge port 12. After the material 5 enters the furnace body 1, it is reciprocated by the multi-layer forward conveying section 311 and the multi-layer reverse conveying section 411, and finally falls into the discharge port 12. During the reciprocating conveying process, the material 5 is fully heated by the heating plate 2 to complete the heat treatment such as drying or roasting.

[0041] Please continue to refer to Figure 1 The furnace body 1 is also provided with an air inlet 13 and an exhaust gas outlet 14. The air inlet 13 is arranged at the bottom or the lower part of the side wall of the furnace body 1, and the exhaust gas outlet 14 is arranged at the top or the upper part of the side wall of the furnace body 1. The air inlet 13 is used to introduce protective gas, such as compressed air or nitrogen, into the furnace body 1, and the exhaust gas outlet 14 is used to discharge the exhaust gas generated during the heat treatment process of the material 5. Since the exhaust gas outlet 14 is arranged at the top or the upper part of the side wall of the furnace body 1, the exhaust gas with a higher temperature is more likely to rise and be discharged from the exhaust gas outlet 14. In addition, due to the introduction of protective gas, an air flow will be formed between the air inlet 13 and the exhaust gas outlet 14, and the exhaust gas can smoothly reach the exhaust gas outlet 14 along the air flow. In the existing horizontal mesh belt furnace, the gas in the furnace is difficult to flow in the horizontal direction, so the gas circulation is not smooth. Compared with the existing horizontal mesh belt furnace, the gas circulation in the vertical mesh belt furnace is smoother and the exhaust gas is easier to discharge.

[0042] The furnace body 1 is a vertical box, and the heating plate 2 is a rectangular plate, the front and rear sides of which can be inserted into the grooves provided on the front and rear side walls of the furnace body 1 to facilitate the disassembly and assembly of the heating plate 2. The furnace body 1 is made of high temperature resistant metal, ceramic or silicon carbide.

[0043] Please continue to refer to Figure 1 In this embodiment, the first conveying mechanism 3 includes a first serpentine mesh belt 31, a plurality of first rollers 32 and a first connecting portion 33. The first serpentine mesh belt 31 bypasses the plurality of first rollers 32 to form a multi-layer forward conveying section 311. The first connecting portion 33 connects the two ends of the first serpentine mesh belt 31 to achieve synchronous transmission of the entire first conveying mechanism 3. The second conveying mechanism 4 includes a second serpentine mesh belt 41, a plurality of second rollers 42 and a second connecting portion 43. The second serpentine mesh belt 41 bypasses the plurality of second rollers 42 to form a multi-layer reverse conveying section 411. The second connecting portion 43 connects the two ends of the second serpentine mesh belt 41 to achieve synchronous transmission of the entire second conveying mechanism 4.

[0044] Please continue to refer to Figure 2-Figure 3 , the first connecting part 33 includes a first turning roller 331 and a first connecting mesh belt 332 bypassing the first turning roller 331; the second connecting part 43 includes a first turning roller 431 and a first connecting mesh belt 432 bypassing the first turning roller 431. Further, the first turning roller 331 and one of the plurality of first rollers 32 are first driving rollers, and the rest are driven rollers. The first driving roller can drive the forward conveying section 311 to convey the material 5 in the forward direction; the first turning roller 431 and one of the plurality of second rollers 42 are second driving rollers, and the rest are driven rollers. The second driving roller can drive the reverse conveying section 411 to convey the material 5 in the reverse direction. Further, the first driving roller and the second driving roller are both connected to a motor; the motor includes a motor body and a driving shaft fixed to the motor body, the driving shaft passes through the side wall of the furnace body 1 and extends into the furnace body 1, and the driving shaft is in sealing contact with the side wall of the furnace body 1 to reduce the heat loss in the furnace body 1. The first conveying mechanism 3 is synchronously driven by the first driving roller, and the second conveying mechanism 4 is synchronously driven by the second driving roller. The entire vertical mesh belt furnace only needs to install two motors. Through the coordinated driving of the two motors, multiple reciprocating conveyances of the material 5 can be achieved. Therefore, the device structure is simple, avoiding the complex device structure and sealing problems caused by the increase in the number of motors, and the control process is simple.

[0045] The radius of the first roller 32 is greater than the radius of the second roller 42. Preferably, the ratio of the radius of the first roller 32 to the radius of the second roller 42 is 2:1-3:1, so that the reverse conveying section 411 can be arranged between two adjacent forward conveying sections 311, so that the forward conveying sections 311 and the reverse conveying sections 411 are arranged in an up-and-down staggered manner. Further, the radius of the first roller 32 is 10 cm-15 cm, and the radius of the second roller 42 is 5 cm-8 cm.

[0046] A plurality of heating plates 2 may be provided, and the plurality of heating plates 2 are arranged at intervals along the height direction of the furnace body 1, so as to form a uniform temperature field in the furnace body 1, and then uniformly heat the material 5 on the forward conveying section 311 and the reverse conveying section 411. Preferably, the plurality of heating plates 2 are arranged in parallel and at equal intervals along the height direction of the furnace body 1, so as to form a uniform temperature field in the furnace body 1. Further, at least one heating plate 2 is provided between each two adjacent forward conveying sections 311 to ensure the heating effect. Furthermore, the heating plate 2 is preferably an electric heating plate, which is easy to install, has a uniform heating effect and precise temperature control.

[0047] The number of layers of the forward conveying section 311 is preferably 3-8 layers to ensure that the material 5 can be repeatedly conveyed and turned over. In this embodiment, illustratively, the number of layers of the forward conveying section 311 is 4 layers, and the number of layers of the reverse conveying section 411 is 3 layers. The discharge port 12 is located directly below the discharge end of the bottom forward conveying section 311 and receives the material 5 dropped from the discharge end.

[0048] The preferred embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited thereto. Within the technical concept of the present invention, the technical solution of the present invention can be subjected to a variety of simple modifications, including the combination of various specific technical features in any suitable manner. In order to avoid unnecessary repetition, the present invention will not further describe various possible combinations. However, these simple modifications and combinations should also be regarded as the contents disclosed by the present invention and belong to the protection scope of the present invention.

Claims

1. A vertical mesh belt furnace, characterized in that: include: A furnace body (1), wherein a feed port (11) is arranged at the top of the furnace body (1), and a discharge port (12) is arranged at the bottom of the furnace body (1); a heating plate (2), the heating plate (2) being arranged in the furnace body (1) and fixed to the side wall of the furnace body (1), the heating plate (2) being used to heat the material (5) entering the furnace body (1); A first conveying mechanism (3), the first conveying mechanism (3) comprising a plurality of forward conveying sections (311) arranged vertically, the forward conveying sections (311) being capable of conveying materials (5) in a forward direction, the plurality of forward conveying sections (311) being synchronously driven; and A second conveying mechanism (4), the second conveying mechanism (4) comprising a plurality of reverse conveying sections (411) arranged in an upper and lower manner, the reverse conveying sections (411) being capable of conveying the material (5) in a reverse direction, the plurality of reverse conveying sections (411) being synchronously driven; The forward conveying section (311) and the reverse conveying section (411) are arranged alternately up and down, and the feeding end of the forward conveying section (311) or the reverse conveying section (411) of the next layer receives the material (5) dropped from the discharging end of the reverse conveying section (411) or the forward conveying section (311) of the previous layer.

2. The vertical mesh belt furnace according to claim 1, characterized in that: The first conveying mechanism (3) comprises a first serpentine mesh belt (31), a plurality of first rollers (32) and a first connecting portion (33), wherein the first serpentine mesh belt (31) passes around the plurality of first rollers (32) to form the multi-layer forward conveying section (311), and the first connecting portion (33) connects two ends of the first serpentine mesh belt (31); and / or, The second conveying mechanism (4) comprises a second serpentine mesh belt (41), a plurality of second rollers (42) and a second connecting portion (43), wherein the second serpentine mesh belt (41) passes around the plurality of second rollers (42) and forms the multi-layer reverse conveying section (411), and the second connecting portion (43) connects the two ends of the second serpentine mesh belt (41).

3. The vertical mesh belt furnace according to claim 2, characterized in that: The first connecting portion (33) comprises a first turning roller (331) and a first connecting mesh belt (332) passing around the first turning roller (331); and / or, The second connecting portion (43) comprises a second turning roller (431) and a second connecting mesh belt (432) that passes around the second turning roller (431).

4. The vertical mesh belt furnace according to claim 3, characterized in that: The first steering roller (331) and one of the first rollers (32) are first driving rollers, and the others are driven rollers, and the first driving roller can drive the forward conveying section (311) to convey the material (5) in the forward direction; and / or, The second steering roller (431) and one of the plurality of second rollers (42) are second driving rollers, and the others are driven rollers. The second driving roller can drive the reverse conveying section (411) to convey the material (5) in the reverse direction.

5. The vertical mesh belt furnace according to claim 2, characterized in that: The ratio of the radius of the first roller (32) to the radius of the second roller (42) is 2:1-3:

1.

6. The vertical mesh belt furnace according to claim 5, characterized in that: The radius of the first roller (32) is 10 cm-15 cm, and the radius of the second roller (42) is 5 cm-8 cm.

7. The vertical mesh belt furnace according to claim 1, characterized in that: The furnace body (1) is also provided with an air inlet (13) and an exhaust gas outlet (14); the air inlet (13) is arranged at the bottom or the lower part of the side wall of the furnace body (1), and the exhaust gas outlet (14) is arranged at the top or the upper part of the side wall of the furnace body (1).

8. The vertical mesh belt furnace according to any one of claims 1 to 7, characterized in that: A plurality of the heating plates (2) are provided, and the plurality of the heating plates (2) are arranged at intervals along the height direction of the furnace body (1).

9. The vertical mesh belt furnace according to claim 8, characterized in that: At least one heating plate (2) is arranged between every two adjacent forward conveying sections (311).

10. The vertical mesh belt furnace according to claim 8, characterized in that: The heating plate (2) comprises an electric heating plate.

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