Integrated sintering furnace dewaxing device for rapid dewaxing

Abstract

The utility model relates to quick dewaxing device field discloses a sintering furnace dewaxing device of integrated quick dewaxing, including the reaction furnace, the reaction furnace outside fixedly connected with the air inlet pipe, the air inlet pipe outside is equipped with the preheating assembly, the air inlet pipe inside is fixedly connected with the fan away from the reaction furnace one end, the reaction furnace inner wall is fixedly connected with a plurality of infrared heating tubes, the reaction furnace inside fixedly connected with centrifugal fan, the reaction furnace inside fixedly connected with two microwave generators. In the utility model, the preheating assembly outside the air inlet pipe heats the air inlet pipeline, the air temperature in the reaction furnace is as high as 100 to 150 DEG C, prevents the low temperature gas from contacting the blank and leads to the local cooling crack, then through the negative pressure in the negative pressure pipeline, the volatile wax steam is rapidly guided to the waste gas treatment system, avoids the secondary condensation pollution furnace body, realizes the effect of improving product quality and precision.

Description

Technical Field

[0001] This utility model relates to the field of rapid dewaxing devices, and in particular to an integrated rapid dewaxing device for sintering furnaces. Background Technology

[0002] The integrated rapid dewaxing sintering furnace dewaxing device is an advanced piece of equipment developed to address the problems of traditional dewaxing processes, such as long processing time, high energy consumption, and environmental pollution. This device is mainly used in fields such as cemented carbide, non-oxide ceramics, metal injection molded products, and graphite materials.

[0003] In the preparation processes of cemented carbide, non-oxide ceramics, metal injection molded products, and high-end graphite materials, dewaxing is a crucial step in the pretreatment of the blank, directly affecting the density and mechanical properties of the product in subsequent sintering processes. Traditional dewaxing processes have long suffered from three problems: First, the dewaxing cycle is long. Taking cemented carbide pressed blanks as an example, conventional hot air circulation dewaxing takes 6-8 hours, and for products with complex structures, it can even take more than 12 hours, severely restricting production efficiency. Second, energy consumption remains high. The unit energy consumption of traditional segmented processes (preheating-holding-cooling) can reach 800-1200 kWh / ton of blank, with an energy utilization rate of less than 30%. Third, environmental protection and resource recycling are significantly lacking. Binders such as paraffin wax and microcrystalline wax are prone to decomposition at high temperatures, generating hydrocarbon-containing waste gas. Furthermore, the wax recovery rate of traditional gravity settling recovery systems is only 60%-70%, resulting not only in raw material waste but also requiring additional treatment of wax-containing wastewater.

[0004] Currently available dewaxing devices consume excessive time during the dewaxing process and require multiple workpiece transfers during processing, significantly reducing dewaxing efficiency. Traditional dewaxing devices also fall short in terms of wax recovery, resulting in a low recovery rate. Therefore, an integrated rapid dewaxing sintering furnace dewaxing device is proposed to address these issues. Utility Model Content

[0005] To overcome the above shortcomings, this utility model provides an integrated rapid dewaxing device for sintering furnaces, which aims to improve the problem of low processing efficiency due to the need for multiple workpiece transfers during processing.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] An integrated rapid dewaxing sintering furnace dewaxing device includes a reactor, an air inlet pipe fixedly connected to the outside of the reactor, a preheating component sleeved on the outside of the air inlet pipe, a fan fixedly connected to the end of the air inlet pipe away from the reactor, multiple infrared heating tubes fixedly connected to the inner wall of the reactor, a centrifugal fan fixedly connected to the top of the reactor, two microwave generators fixedly connected to the inside of the reactor, and a furnace door rotatably connected to the end of the reactor away from the air inlet pipe.

[0008] As a further description of the above technical solution:

[0009] A negative pressure pipe is fixedly connected to the top of the reactor. A condenser pipe is sleeved on the outside of the negative pressure pipe. A liquefaction tank is fixedly connected to the end of the negative pressure pipe away from the reactor. A filter screen is fixedly connected inside the liquefaction tank. A liquid outlet is fixedly connected to the bottom of the liquefaction tank. A valve is installed outside the liquid outlet.

[0010] As a further description of the above technical solution:

[0011] An exhaust pipe is fixedly connected to the top of the liquefaction tank, an activated carbon plate is fixedly connected inside the exhaust pipe, and a high-speed fan is fixedly connected inside the exhaust pipe.

[0012] As a further description of the above technical solution:

[0013] A platform is fixedly connected to the bottom of the reactor, and four round legs are fixedly connected to the bottom of the platform.

[0014] As a further description of the above technical solution:

[0015] The furnace door is fixedly connected to a handle on the outside.

[0016] As a further description of the above technical solution:

[0017] The high-speed fan is located on the outside of the activated carbon plate.

[0018] As a further description of the above technical solution:

[0019] The preheating component is attached to the outside of the reactor.

[0020] As a further description of the above technical solution:

[0021] The condenser tube is attached to the top of the liquefaction tank.

[0022] This utility model has the following beneficial effects:

[0023] 1. In this utility model, the air inlet pipe is heated by the preheating component outside the air inlet pipe, so that the temperature of the air entering the reaction furnace is as high as 100 to 150°C, which prevents the low temperature gas from contacting the blank and causing local cooling and cracking. Then, the volatile wax vapor is quickly discharged to the waste gas treatment system through the negative pressure in the negative pressure pipe, avoiding secondary condensation and pollution of the furnace body, thus achieving the effect of improving product quality and precision.

[0024] 2. In this utility model, by connecting the reaction furnace and the liquefaction tank with a negative pressure pipeline, and by using a high-speed fan to create negative pressure inside the device, multiple devices are integrated together, which increases the convenience of processing and achieves the effect of improving work efficiency by eliminating the need for frequent workpiece transfer during processing. Attached Figure Description

[0025] Figure 1 This is a three-dimensional schematic diagram of an integrated rapid dewaxing device for a sintering furnace proposed in this utility model.

[0026] Figure 2 This is a schematic diagram of the high-speed fan in an integrated rapid dewaxing sintering furnace dewaxing device proposed in this utility model.

[0027] Figure 3 This is a schematic diagram of the structure of the infrared heating tube of an integrated rapid dewaxing sintering furnace dewaxing device proposed in this utility model.

[0028] Figure 4 This is a schematic diagram of the microwave generator of an integrated rapid dewaxing sintering furnace dewaxing device proposed in this utility model.

[0029] Figure 5 This is a schematic diagram of the filter screen of an integrated rapid dewaxing sintering furnace dewaxing device proposed in this utility model.

[0030] Legend:

[0031] 1. Reactor; 2. Air inlet duct; 3. Preheating assembly; 4. Fan; 5. Furnace door; 6. Handle; 7. Microwave generator; 8. Infrared heating tube; 9. Negative pressure pipeline; 10. Condenser; 11. Liquefaction tank; 12. Filter screen; 13. Exhaust pipe; 14. Activated carbon plate; 15. High-speed fan; 16. Liquid outlet; 17. Valve; 18. Platform; 19. Round leg; 20. Centrifugal fan. Detailed Implementation

[0032] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0033] Reference Figures 1-3This utility model provides an embodiment of an integrated rapid dewaxing sintering furnace dewaxing device, comprising a reactor 1, an air inlet pipe 2 fixedly connected to the outside of the reactor 1, a preheating component 3 sleeved on the outside of the air inlet pipe 2, a fan 4 fixedly connected to the end of the air inlet pipe 2 away from the reactor 1, the air blown into the air inlet pipe 2 by the fan 4 being heated to 100 to 150°C by the preheating component 3 before being introduced into the reactor 1, multiple infrared heating tubes 8 fixedly connected to the inner wall of the reactor 1, and a centrifugal fan 20 fixedly connected to the top of the reactor 1 to form a directional airflow circulation inside the reactor 1, the airflow speed being adjustable to ensure that wax vapor quickly detaches from the surface of the blank, two microwave generators 7 fixedly connected inside the reactor 1, through the dual action of the infrared heating tubes 8 and the microwave generators 7, the temperature inside the reactor 1 is rapidly increased, significantly shortening the time required for dewaxing, and a furnace door 5 is rotatably connected to the end of the reactor 1 away from the air inlet pipe 2, opening the furnace door 5 allows the workpiece to be placed into the reactor 1.

[0034] Reference Figures 4-5 A negative pressure pipe 9 is fixedly connected to the top of the reactor 1. A condenser pipe 10 is fitted outside the negative pressure pipe 9. Air containing gaseous wax is drawn into the negative pressure pipe 9 and condensed and liquefied through the condenser pipe 10. A liquefaction tank 11 is fixedly connected to the end of the negative pressure pipe 9 away from the reactor 1. A filter screen 12 is fixedly connected inside the liquefaction tank 11 to separate impurities. A liquid outlet 16 is fixedly connected to the bottom of the liquefaction tank 11. A valve 17 is installed outside the liquid outlet 16. The liquefied wax can be collected by opening the valve 17.

[0035] Reference Figure 5 The top of the liquefaction tank 11 is fixedly connected to an exhaust pipe 13, an activated carbon plate 14 is fixedly connected inside the exhaust pipe 13, and a high-speed fan 15 is fixedly connected inside the exhaust pipe 13. The high-speed fan 15 rotates at high speed to extract the air in the device, creating a negative pressure zone in the liquefaction tank 11. The air discharged from the device is filtered by the activated carbon plate 14, which adsorbs a large amount of volatile organic compounds.

[0036] Reference Figures 1-3 The bottom of the reactor 1 is fixedly connected to a platform 18, and the bottom of the platform 18 is fixedly connected to four round legs 19, which serve as a load-bearing function for the entire equipment.

[0037] Reference Figures 2-4 The furnace door 5 is fixedly connected to a handle 6 on the outside, making it easier to open the furnace door 5 by pulling the handle 6.

[0038] Reference Figure 5 The high-speed fan 15 is located outside the activated carbon plate 14 to prevent impurities in the gas inside the device from damaging the high-speed fan 15, while adsorbing volatile organic compounds in the exhaust gas.

[0039] Reference Figures 1-3 The preheating component 3 is attached to the outside of the reactor 1.

[0040] Reference Figures 1-3 The condenser tube 10 is attached to the top of the liquefaction tank 11.

[0041] Working principle: Open the furnace door 5 and place the workpiece into the reaction furnace 1. The high-speed fan 15 blows the air out of the device, creating a negative pressure inside. The air heated by the preheating component 3 is introduced into the reaction furnace 1 through the air inlet pipe 2. The infrared heating tube 8 can generate short-wave infrared light that quickly penetrates the blank, so that the wax inside is heated evenly, reducing deformation or cracking caused by thermal stress. The microwave generator 7 acts directly on the wax molecules through dielectric heating, achieving rapid internal heating and significantly shortening the dewaxing time. The centrifugal fan 20 creates a directional airflow circulation inside the device, and the airflow speed is adjustable, ensuring that the wax vapor quickly leaves the surface of the blank. Due to the negative pressure in the liquefaction tank 11, the vaporized wax is drawn into the negative pressure pipe 9, condensed by the condenser pipe 10, and flows into the liquefaction tank 11. The exhaust gas is purified by the activated carbon plate 14 and discharged. Open the valve 17 and collect the liquefied wax at the liquid outlet 16.

[0042] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An integrated rapid dewaxing sintering furnace dewaxing device, comprising a reactor (1), characterized in that: The reactor (1) is fixedly connected to an air inlet pipe (2), and a preheating component (3) is fitted on the outside of the air inlet pipe (2). A fan (4) is fixedly connected to the end of the air inlet pipe (2) away from the reactor (1). Multiple infrared heating tubes (8) are fixedly connected to the inner wall of the reactor (1). A centrifugal fan (20) is fixedly connected to the top of the reactor (1). Two microwave generators (7) are fixedly connected inside the reactor (1). A furnace door (5) is rotatably connected to the end of the reactor (1) away from the air inlet pipe (2).

2. The integrated rapid dewaxing device for a sintering furnace according to claim 1, characterized in that: The reactor (1) is fixedly connected to a negative pressure pipe (9) at the top. A condenser pipe (10) is sleeved on the outside of the negative pressure pipe (9). A liquefaction tank (11) is fixedly connected to the end of the negative pressure pipe (9) away from the reactor (1). A filter screen (12) is fixedly connected inside the liquefaction tank (11). A liquid outlet (16) is fixedly connected to the bottom of the liquefaction tank (11). A valve (17) is provided on the outside of the liquid outlet (16).

3. The integrated rapid dewaxing dewaxing device for a sintering furnace according to claim 2, characterized in that: The top of the liquefaction tank (11) is fixedly connected to an exhaust pipe (13), an activated carbon plate (14) is fixedly connected inside the exhaust pipe (13), and a high-speed fan (15) is fixedly connected inside the exhaust pipe (13).

4. The integrated rapid dewaxing device for a sintering furnace according to claim 1, characterized in that: The bottom of the reactor (1) is fixedly connected to a platform (18), and the bottom of the platform (18) is fixedly connected to four round legs (19).

5. The integrated rapid dewaxing device for a sintering furnace according to claim 1, characterized in that: The furnace door (5) is fixedly connected to a handle (6) on the outside.

6. The integrated rapid dewaxing sintering furnace dewaxing device according to claim 3, characterized in that: The high-speed fan (15) is located on the outside of the activated carbon plate (14).

7. The integrated rapid dewaxing device for a sintering furnace according to claim 1, characterized in that: The preheating component (3) abuts against the outside of the reactor (1).

8. The integrated rapid dewaxing device for a sintering furnace according to claim 2, characterized in that: The condenser tube (10) abuts against the top of the liquefaction tank (11).

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