Roasting furnace

Abstract

The utility model is suitable for the technical field of roasting furnaces, and provides a roasting furnace which comprises a furnace body. The heat-preservation fire-resistant cotton plate is laid on the inner side wall of the furnace body; the high-temperature mullite brick wall body and the high-temperature corundum castable are laid on the outer side wall of the heat-preservation fire-resistant cotton plate and close to the interior of the furnace body, and the high-temperature mullite brick wall body is located on one side of the high-temperature corundum castable; the heat storage chamber is arranged in the furnace body and is close to the part between the high-temperature corundum castable on the upper side and the high-temperature corundum castable on the lower side; the high-temperature ceramic heat absorption block is filled in the inner side wall of the heat storage chamber; compared with a circular flaming port, the burning flaming port is designed to be oval, the flaming area is increased, the flaming speed and strength are reduced, products in the roasting furnace are evenly heated, the situation that the products are burnt out through the flaming port is avoided, the smoke melting speed is increased by more than 60% through the V-shaped groove formed in the hearth compared with a flat-bottom hearth, smoke dust at an exhaust port and carbon deposit in the products are effectively reduced, and the energy consumption is reduced. And through-burning efficiency of the shell is improved by internal and external heating of the product.

Description

Technical Field

[0001] The utility model belongs to the technical field of roasting furnaces, in particular to a roasting furnace. Background Art

[0002] The roasting furnace is a machine that can significantly reduce the sintering temperature and greatly reduce energy consumption.

[0003] The heat storage chambers in the existing roasting furnaces are all independently made and then spliced ​​outside the main body. Since thermal insulation and connection strength cannot be achieved at the same time, the surface temperature of the connection part will be higher than 200 degrees when in use. The flame nozzles in the roasting furnace are all circular in design. Due to the height limitation of the furnace, the circular design has a small flame. Under the same combustion power, the fire is particularly strong, which will cause uneven heating of the products in the furnace and even burn the products at the flame nozzle. Since the roasting furnace is mainly used for sintering of the shell of dewaxing precision casting, there will always be residual industrial wax in the shell that cannot be removed and will burn at high temperature.

[0004] Therefore, a roasting furnace is proposed to solve the deficiencies in the prior art. Utility Model Content

[0005] The utility model provides a roasting furnace, aiming to solve the above problems.

[0006] The utility model is implemented as follows: a roasting furnace comprises: a furnace body; a heat-insulating refractory wool board laid on the inner wall of the furnace body; a high-temperature molybdenum brick wall and a high-temperature corundum castable laid on the outer wall of the heat-insulating refractory wool board near the furnace body, wherein the high-temperature molybdenum brick wall is located on one side of the high-temperature corundum castable; a heat storage chamber arranged between the high-temperature corundum castables on the upper and lower sides of the furnace body; a high-temperature ceramic heat-absorbing block filled in the inner wall of the heat storage chamber; and a combustion flame-spraying port arranged at a position near one side of the high-temperature ceramic heat-absorbing block in the heat storage chamber; a wall plate reinforcement channel steel fixed to the top of the furnace body by bolts; and an air inlet and exhaust pipe fixed to the top of the furnace body by bolts at a position near one side of the wall plate reinforcement channel steel; a control box fixed to the outer wall of the furnace body by bolts; a control panel embedded in the outer wall of the control box; a furnace arranged at the central position of the furnace body; a groove opened at the bottom of the furnace chamber; and an insulation door hinged to the outer wall of the furnace body at a position near one side of the heat storage chamber.

[0007] Preferably, there are two furnaces in total, and the two furnaces are symmetrically arranged inside the furnace body, and the two furnaces are separated by a high-temperature molybdenum brick wall.

[0008] Preferably, the cross section of the flame-spraying end of the combustion flame-spraying port is elliptical.

[0009] Preferably, the cross section of the groove is a V-shaped structure.

[0010] Preferably, the outer side wall and the bottom of the furnace body are both provided with iron plates welded together.

[0011] Preferably, the heat storage chamber is communicated with the furnace.

[0012] Compared with the prior art, the embodiments of the present application have the following beneficial effects:

[0013] By designing the combustion nozzle into an elliptical shape, the nozzle area is increased compared to the circular nozzle, and the nozzle speed and intensity are reduced, so that the products in the roasting furnace are heated evenly, avoiding the situation that the nozzle products are burned. The V-shaped groove in the furnace increases the smoke reduction speed by more than 60% compared to the flat bottom hearth, effectively reducing the smoke at the exhaust port and the carbon deposits in the product. The product is heated inside and outside to improve the shell burning efficiency. It is combined with the furnace body through the heat storage chamber, with a small volume and a high heat recovery rate. The surface temperature of the insulation door made of insulation material on the outside is below 80 degrees when in use, and it is convenient and quick to replace the high-temperature ceramic heat absorbing block. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the external structure of the utility model Figure 1 ;

[0015] Figure 2 This is a schematic diagram of the external structure of the utility model Figure 2 ;

[0016] Figure 3 It is a cross-sectional view of the utility model;

[0017] Figure 4 It is a schematic diagram of the partial internal structure of the utility model;

[0018] Figure 5 It is a schematic diagram of the combustion jet structure of the utility model.

[0019] In the figure: 1. furnace body; 2. heat-insulating refractory wool board; 3. high-temperature molybdenum brick wall; 4. high-temperature corundum castable; 5. high-temperature ceramic heat-absorbing block; 6. wall panel reinforcement channel steel; 7. inlet and outlet pipes; 8. combustion flame nozzle; 9. control box; 10. control panel; 11. groove; 12. heat storage chamber; 13. furnace; 14. insulation door. DETAILED DESCRIPTION

[0020] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by technicians in the technical field of this application; the terms used in the specification of the application herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned drawings are intended to cover non-exclusive inclusions. The terms "first", "second", etc. in the specification and claims of this application or the above-mentioned drawings are used to distinguish different objects, not to describe a specific order.

[0021] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0022] The utility model embodiment provides a roasting furnace, such as Figure 1-5 As shown, it includes a furnace body 1, the outer wall and bottom of the furnace body 1 are provided with spliced ​​and welded iron plates, the inner wall of the furnace body 1 is paved with a heat-insulating refractory wool board 2, the outer wall of the heat-insulating refractory wool board 2 is paved with a high-temperature molybdenum brick wall 3 and a high-temperature corundum castable 4, the high-temperature molybdenum brick wall 3 is located on one side of the high-temperature corundum castable 4, the interior of the furnace body 1 is close to a heat storage chamber 12 between the upper and lower high-temperature corundum castables 4, the interior of the heat storage chamber 12 is paved with a high-temperature ceramic heat absorption block 5, and the interior of the heat storage chamber 12 is close to a side of the high-temperature ceramic heat absorption block 5. A combustion flame nozzle 8 is provided, the top of the furnace body 1 is fixedly connected to a wall panel reinforcement channel steel 6 by bolts, and the furnace body 1 An inlet and outlet pipe 7 is fixedly connected with the top of the furnace body 1 at a position on one side near the wall panel reinforcement channel steel 6 by bolts, a control box 9 is fixedly connected with the outer wall of one side of the furnace body 1 by bolts, and a control panel 10 is embedded in the outer wall of one side of the control box 9. A furnace 13 is arranged at a position on one side near the heat storage chamber 12 inside the furnace body 1. The heat storage chamber 12 and the furnace 13 are connected. There are two furnaces 13 in total, and the two furnaces 13 are symmetrically arranged inside the furnace body 1. The two furnaces 13 are separated by a high-temperature molay stone brick wall 3. A groove 11 is provided at the inner bottom of the furnace 13, and an insulating door 14 is hingedly connected to the outer wall of one side of the furnace body 1 at a position on one side near the heat storage chamber 12.

[0023] By arranging the heat storage chamber 12 and the high-temperature ceramic heat absorption block 5 inside the furnace body, heat can be effectively stored and heat loss can be reduced. During the combustion process, heat is absorbed and stored, and then released when needed, which can improve the use efficiency of thermal energy and reduce energy consumption.

[0024] The use of the heat-insulating refractory wool board 2 and the high-temperature corundum castable 4, as well as the arrangement of the high-temperature molybdenum brick wall 3, provides a good heat-insulating effect, reduces heat loss to the outside, and improves the thermal efficiency of the furnace.

[0025] The design of the control box 9 and the control panel 10 enables the operator to conveniently control the operation of the furnace, including the temperature, the combustion process, etc., so as to ensure the stability of the production process and the quality of the product.

[0026] The outer wall and bottom of the furnace body 1 are made of welded iron plates, and the top is fixedly connected with a wall panel reinforcement channel steel 6 by bolts. These designs enhance the structural strength of the furnace and ensure the stability and safety of the furnace at high temperatures.

[0027] The inner bottom of the furnace 13 is provided with a groove 11, which can be adjusted according to different production requirements, so that the furnace can adapt to a variety of different production processes.

[0028] The design of the heat-insulating door 14 makes maintenance and cleaning more convenient, reduces downtime and improves production efficiency.

[0029] By optimizing the combustion process and heat energy utilization, exhaust emissions can be reduced and the impact on the environment can be minimized.

[0030] In summary, the roasting furnace of the present application achieves beneficial effects such as high efficiency and energy saving, good thermal insulation performance, flexible control system, high structural strength, wide adaptability, easy maintenance and environmentally friendly emissions through its unique design. It is a practical and efficient industrial roasting equipment.

[0031] It should be noted that since the heat storage chambers in the existing roasting furnaces are all independently made and then spliced ​​outside the main body, since thermal insulation and connection strength cannot be achieved at the same time, the surface temperature of the connecting part will be higher than 200 degrees when in use. The flame nozzles in the roasting furnace are all circular in design. Due to the height limitation of the furnace, the circular design has a small flame nozzle. Under the same combustion power, the fire is particularly strong, which will cause uneven heating of the products in the furnace and even burn the products at the flame nozzle. Since the roasting furnace is mainly used for sintering of the shell of dewaxing precision casting, there will always be residual industrial wax in the shell that cannot be removed and will burn at high temperature. In this embodiment, The combustion crater 8 is designed to be elliptical, which increases the crater area compared to the circular crater, and reduces the crater speed and intensity, so that the products in the roasting furnace are heated evenly, avoiding the situation where the crater products are burned. The V-shaped groove 11 is opened in the furnace 13, which speeds up the smoke reduction rate by more than 60% compared with the flat bottom hearth, effectively reducing the smoke at the exhaust port and the carbon deposits in the product. The product is heated inside and outside to improve the efficiency of shell burning. It is combined with the furnace body 1 through the heat storage chamber 12, has a small volume and a high heat recovery rate, and the surface temperature of the insulation door 14 made of insulation material on the outside is below 80 degrees when in use, and it is convenient and quick to replace the high-temperature ceramic heat absorption block 5.

[0032] Specifically, in this embodiment, this scheme mainly includes a combustion flame nozzle 8, a heat storage chamber 12 and a groove 11. When in use, the shell casting material is placed in the furnace 13, the furnace door of the furnace body 1 is closed, and hydrogen and natural gas liquefied gas are used as fuel. After the combustion flame nozzle 8 is ignited, a high-temperature flame is generated. The flame contacts the shell casting material for high-temperature heating. The heat-insulating refractory wool board 2, the high-temperature molay stone brick wall 3 and the high-temperature corundum castable 4 in the furnace body 1 provide heat preservation capacity and supporting strength under high temperature. The control panel 10 on the control box 9 is used to control the switching of the combustion flame nozzles 8 in the two furnaces 13, and the high-temperature ceramic heat absorption block 5 is used to store heat. When the high-temperature ceramic heat absorption block 5 needs to be replaced, the insulation door 14 is opened and the high-temperature ceramic heat absorption block 5 is replaced.

[0033] In a further preferred embodiment of the present invention, Figure 4 As shown, the cross section of the flame-spraying end of the combustion flame-spraying port 8 is elliptical.

[0034] In this embodiment, the oval design of the combustion crater 8 effectively increases the crater surface, slows down the speed and strength of the flame, and makes the product evenly heated. The elliptical design of the combustion crater 8 can effectively increase the area of ​​the crater, thereby slowing down the speed and strength of the flame. This design makes the flame softer, and can contact the shell casting material more fully, achieving more uniform heating. In principle, the elliptical crater increases the mixing area of ​​the flame and air, making the combustion more complete, reducing the generation of local high-temperature points, and thus reducing the risk of local overheating of the product.

[0035] In a further preferred embodiment of the present invention, Figure 3 As shown, the cross section of the groove 11 is a V-shaped structure.

[0036] In this embodiment, the design of the groove 11 makes the industrial wax burn about 60% faster than the flat hearth, and can make the temperature and speed of the heating inside and outside the shell better and faster. This design can enhance the heat exchange efficiency and make the temperature and speed of the heating inside and outside the shell more uniform. In principle, the V-shaped groove increases the heat exchange surface area and promotes heat transfer. At the same time, due to the principle of hot air rising, the V-shaped groove helps to form a better convection cycle, thereby improving the heating efficiency.

[0037] In summary, the roasting furnace of the present application achieves a more uniform heating effect and improves the heat exchange efficiency through the design of the elliptical combustion nozzle and the V-shaped groove, thereby improving the production efficiency and product quality. These design features help to achieve an efficient, uniform and controllable heating process, and are a practical and efficient industrial roasting equipment.

[0038] It should be noted that, for the above-mentioned embodiments, for the sake of simplicity, they are all described as a series of action combinations, but those skilled in the art should know that the utility model is not limited by the described action sequence, because according to the utility model, some steps may be performed in other sequences or simultaneously. Secondly, those skilled in the art should also know that the embodiments described in the specification are all preferred embodiments, and the actions and modules involved are not necessarily required by the utility model.

[0039] In the several embodiments provided in the present application, it should be understood that the disclosed devices can be implemented in other ways. For example, the device embodiments described above are merely schematic, such as the division of the above-mentioned units. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or communication connection shown or discussed can be through some interfaces, and the indirect coupling or communication connection between devices or units can be in the form of telecommunication or other forms.

[0040] The units described above as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0041] The above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit the protection scope of the utility model. Obviously, the described embodiments are only some embodiments of the utility model, rather than all embodiments. Based on these embodiments, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model. Although the utility model has been described in detail with reference to the above embodiments, ordinary technicians in this field can still combine, add, delete or make other adjustments to the features in the various embodiments of the utility model according to the circumstances without conflict, without making creative work, so as to obtain different other technical solutions that do not deviate from the concept of the utility model in essence, and these technical solutions also belong to the scope of protection of the utility model.

Claims

1. A roasting furnace, characterized in that: include: Furnace body (1); A heat-insulating fire-resistant wool board (2) laid on the inner wall of the furnace body (1); A high-temperature molybdenum brick wall (3) and a high-temperature corundum castable (4) are laid on the outer wall of the heat-insulating refractory wool board (2) close to the interior of the furnace body (1), wherein the high-temperature molybdenum brick wall (3) is located on one side of the high-temperature corundum castable (4); A heat storage chamber (12) is arranged inside the furnace body (1) and between the high-temperature corundum castables (4) on the upper and lower sides; A high-temperature ceramic heat-absorbing block (5) filled in the inner wall of the heat storage chamber (12); and A combustion flame-spraying port (8) disposed inside the heat storage chamber (12) at a position close to one side of the high-temperature ceramic heat absorption block (5); A wall plate reinforcement channel steel (6) fixed to the top of the furnace body (1) by bolts; and An air inlet and outlet pipe (7) fixed by bolts to a position on the top of the furnace body (1) close to one side of the wall plate reinforcement channel steel (6); A control box (9) fixed to the outer wall of the furnace body (1) by bolts; A control panel (10) embedded in the outer side wall of the control box (9); A furnace chamber (13) disposed at a central position inside the furnace body (1); A groove (11) is formed at the bottom of the furnace (13); An insulating door (14) is hingedly connected to the outer wall of the furnace body (1) at a position close to one side of the heat storage chamber (12).

2. The roasting furnace according to claim 1, characterized in that There are two furnaces (13) in total, and the two furnaces (13) are symmetrically arranged inside the furnace body (1), and the two furnaces (13) are separated by a high-temperature molybdenum brick wall (3).

3. The roasting furnace according to claim 1, characterized in that The cross section of the flame-spraying end of the combustion flame-spraying port (8) is elliptical.

4. The roasting furnace according to claim 1, characterized in that The cross section of the groove (11) is a V-shaped structure.

5. The roasting furnace according to claim 1, characterized in that: The outer side wall and the bottom of the furnace body (1) are both provided with spliced ​​and welded iron plates.

6. The roasting furnace according to claim 1, characterized in that: The heat storage chamber (12) and the furnace (13) are connected.

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