Nitriding furnace exhaust gas treatment device for aluminum profile machining

Abstract

The utility model relates to the technical field of waste gas treatment, specifically relates to a nitrogenization furnace waste gas treatment device for aluminium profile machining, including the treatment box, the inside hollow setting of treatment box, the side end surface lower extreme of treatment box is fixedly connected with the air inlet pipe, the air inlet pipe links with the nitrogenization furnace exhaust, the inside setting of air inlet pipe has the exhaust mechanism, the exhaust mechanism is used for the fast waste gas that nitrogenization furnace produced is sent to the inside of treatment box, the middle part fixed connection of treatment box has the vertical board, just the vertical board will the inside part of treatment box divide into separation area and purification area, separation area is located close to the side of air inlet pipe, the inner wall side fixed connection of separation area has the sleeve pipe, the sleeve pipe is with air inlet pipe coaxial, the utility model solves the nitrogenization furnace waste gas in prior art before entering the purification area lacks efficient separation structure, purification liquid cooling efficiency is low, is difficult to maintain low temperature state to lead to the problem of poor purification effect and frequent maintenance.

Description

Technical Field

[0001] This utility model relates to the field of waste gas treatment technology, and in particular to a waste gas treatment device for a nitriding furnace used in aluminum profile processing. Background Technology

[0002] In the processing of aluminum profiles, nitriding furnaces are typically used to improve the surface properties of the material and enhance its corrosion resistance and wear resistance. The nitriding process continuously generates high-temperature exhaust gas, which contains not only a large amount of heat but also ammonia, nitrogen oxides, volatile organic compounds, oil mist, and particulate impurities. If discharged directly without effective treatment, it can easily cause environmental pollution and also pose a threat to the health of workers.

[0003] In the existing technology, most common nitriding furnace exhaust gas treatment devices directly introduce exhaust gas into a tank containing purification liquid through pipes and use liquid absorption to remove harmful components. However, such devices usually lack a cyclone separation structure or an effective particulate matter blocking mechanism before the exhaust gas enters the purification zone. This causes oil mist, dust and larger particles entrained in the exhaust gas to be directly deposited at the bottom of the purification zone, which not only affects the absorption effect of the purification liquid, but also accelerates the accumulation of deposits, thereby increasing the frequency of cleaning and maintenance. In addition, in some devices, the cooling method of the purification liquid often relies on a simple external heat exchanger. The flow path of the coolant is short and the heat exchange area is limited, resulting in an unsatisfactory cooling effect of the purification liquid. It is difficult to maintain a low temperature during operation, thereby reducing the absorption efficiency of the purification liquid for harmful gases in the exhaust gas. Utility Model Content

[0004] In view of the problems in the prior art, such as the lack of an efficient separation structure for the exhaust gas of the nitriding furnace before entering the purification zone, the low cooling efficiency of the purification liquid, and the difficulty in maintaining a low temperature, resulting in poor purification effect and frequent maintenance, this utility model is proposed.

[0005] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a nitriding furnace exhaust gas treatment device for aluminum profile processing, comprising a treatment box, the treatment box being hollow inside, an air inlet pipe fixedly connected to the lower end of one side end face of the treatment box, the air inlet pipe being connected to the exhaust port of the nitriding furnace, an exhaust mechanism being provided inside the air inlet pipe, the exhaust mechanism being used to quickly send the exhaust gas generated by the nitriding furnace into the interior of the treatment box, a vertical plate fixedly connected to the middle of the treatment box, and the vertical plate dividing the interior of the treatment box into a separation zone and a purification zone, the separation zone being located on the side near the air inlet pipe, and so on. A sleeve is fixedly connected to one side of the inner wall of the separation zone. The sleeve is coaxial with the air inlet pipe, and a spiral blade is fixedly connected inside the sleeve. Multiple through holes are evenly spaced on the surface of the sleeve. An inlet pipe is fixedly connected to the upper middle part of the vertical plate on one side of the purification zone. The upper end of the inlet pipe is connected to the separation zone, and the lower end is located at the bottom of the purification zone. A cooling pipe for cooling the internal purified liquid is provided inside the processing box at the bottom of the purification zone. A spiral channel is opened inside the cooling pipe to increase the flow time of the cooling liquid inside the cooling pipe.

[0006] As a preferred embodiment of the exhaust gas treatment device for nitriding furnace in aluminum profile processing according to the present invention, the exhaust mechanism includes a bracket fixedly connected inside the air inlet pipe, a servo motor is installed in the middle of the bracket, and the output end of the servo motor faces the sleeve and is fixedly connected with a fan blade.

[0007] As a preferred embodiment of the nitriding furnace exhaust gas treatment device for aluminum profile processing described in this utility model, wherein: a collection box is slidably connected to the lower end of the treatment box on one side of the sleeve, a viewing window is provided on one side of the collection box, an inclined plate is fixedly connected to the middle of the end face of the upright plate near the sleeve, and multiple baffles are fixedly connected at even intervals to the end face of the inclined plate near the sleeve.

[0008] As a preferred embodiment of the nitriding furnace exhaust gas treatment device for aluminum profile processing described in this utility model, a floating plate is slidably connected in the purification zone inside the treatment box, and the floating plate has multiple holes.

[0009] As a preferred embodiment of the nitriding furnace exhaust gas treatment device for aluminum profile processing described in this utility model, a circulating cooler is provided at the lower end of one side end face of the treatment box, and both ends of the cooling pipe extend outside the treatment box and are connected to the circulating cooler.

[0010] As a preferred embodiment of the nitriding furnace exhaust gas treatment device for aluminum profile processing described in this utility model, wherein: a plurality of exhaust holes are evenly spaced at the upper end of the purification zone on one side of the treatment box; a liquid inlet pipe is installed on the upper end of the treatment box on one side of the plurality of exhaust holes; a liquid level height pipe is installed on the side of the treatment box away from the exhaust pipe; and the liquid level height pipe is connected to the purification zone inside the treatment box.

[0011] The beneficial effects of this utility model are: 1. A cyclone separation structure with a sleeve and spiral blades is installed before the exhaust gas enters the purification zone. Under the action of centrifugal force, it can efficiently separate dust particles and oil mist droplets in the exhaust gas. The separated material settles into the collection box through the through hole, reducing the amount of impurities entering the purification liquid from the source and effectively avoiding the problem of reduced absorption efficiency of the purification liquid. At the same time, the purification liquid is kept at a low temperature by the cooling pipe at the bottom of the purification zone, which enhances the absorption capacity and reduces the volatilization loss caused by high temperature, thereby significantly extending the service life of the purification liquid.

[0012] 2. The collection box adopts a visual design and can be pulled out for cleaning, which makes it convenient for operators to remove sediment in a timely manner, reducing maintenance time and labor intensity. The porous structure of the float plate can evenly distribute the exhaust gas bubbles, ensuring stable purification effect. The double spiral cooling pipe design increases the flow path of coolant and the heat exchange area, improving cooling efficiency. The above structures work together to not only reduce the maintenance frequency of the equipment, but also ensure the purification stability and reliability of the device under long-term continuous operation. Attached Figure Description

[0013] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Wherein: Figure 1 This is a first-person perspective three-dimensional structural diagram of the present invention.

[0014] Figure 2 This is a schematic diagram of the internal three-dimensional structure of this utility model.

[0015] Figure 3 This is a partial three-dimensional structural diagram of the present invention.

[0016] Figure 4 This is a schematic diagram of the internal three-dimensional structure of the cooling pipe in this utility model.

[0017] Figure 5 This is a schematic diagram of the second-view three-dimensional structure of this utility model.

[0018] Explanation of reference numerals in the attached figures: 1. Processing tank; 2. Air inlet pipe; 3. Exhaust port; 4. Liquid inlet pipe; 5. Liquid level pipe; 6. Collection tank; 7. Sleeve; 8. Vertical plate; 9. Float plate; 10. Inlet pipe; 11. Cooling pipe; 12. Inclined plate; 13. Support; 14. Servo motor; 15. Fan blade; 16. Through hole; 17. Spiral blade; 18. Baffle; 19. Spiral channel; 20. Circulating cooler. Detailed Implementation

[0019] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Example 1

[0020] Reference Figure 1-5 This is the first embodiment of the present invention, which provides a nitriding furnace exhaust gas treatment device for aluminum profile processing, including a treatment box 1. The treatment box 1 is made of corrosion-resistant metal plate and has a hollow sealed structure. Support feet are provided at the bottom for easy installation and fixing. An air inlet pipe 2 is fixedly connected to the lower end of one side end face of the treatment box 1. The air inlet pipe 2 is made of high-temperature resistant stainless steel and its inlet end is connected to the exhaust port of the nitriding furnace through a flange to introduce the high-temperature exhaust gas discharged from the nitriding furnace into the interior of the treatment box 1.

[0021] An exhaust mechanism is installed inside the air intake pipe 2. The exhaust mechanism includes a bracket 13 fixedly connected inside the air intake pipe 2. A servo motor 14 is installed in the middle of the bracket 13. The output end of the servo motor 14 faces the sleeve 7 and is fixedly connected to a multi-bladed fan 15. When the servo motor 14 is working, it drives the fan 15 to rotate at high speed, thereby forming a strong induced draft effect, which quickly sends the exhaust gas generated by the nitriding furnace into the treatment box 1, thereby increasing the exhaust gas entry speed and flow rate.

[0022] A vertical plate 8 is fixedly connected to the middle of the treatment box 1. The vertical plate 8 is perpendicular to the air intake direction and divides the internal space of the treatment box 1 into an independent separation zone and a purification zone. The separation zone is located on the side close to the air intake pipe 2. A sleeve 7 is fixedly connected to one side of the separation zone. The sleeve 7 is coaxially connected to the air intake pipe 2. A spiral blade 17 is fixedly installed inside the sleeve 7. When the exhaust gas passes through, the spiral blade 17 will generate rotational disturbance to the airflow, so that the exhaust gas forms a vortex. The centrifugal force is used to throw the dust particles and oil mist droplets in the sleeve 7 to the inner wall of the sleeve 7. Then, the dust particles and oil mist droplets are discharged into the bottom of the separation zone through multiple through holes 16 evenly distributed on the surface of the sleeve 7, thus achieving the initial separation of large particulate impurities.

[0023] An inlet pipe 10 is fixedly connected to the upper middle part of the vertical plate 8 on one side of the purification zone. The upper end of the inlet pipe 10 is connected to the separation zone, and the lower end is located at the bottom of the purification zone. It is used to introduce the swirled exhaust gas into the purification liquid for gas-liquid contact. A cooling pipe 11 is set at the bottom of the purification zone. A spiral channel 19 is opened inside the cooling pipe 11. The coolant has a long flow path and a large heat exchange area in the spiral channel 19, which can effectively absorb the heat in the purification liquid and reduce the temperature of the purification liquid. Both ends of the cooling pipe 11 extend outside the treatment box 1 and are connected to the circulating cooler 20. The circulating cooler 20 has a built-in compressor refrigeration system, which can continuously provide low-temperature coolant and continuously deliver it to the cooling pipe 11 under the action of the circulating pump to achieve continuous cooling of the purification liquid.

[0024] Multiple exhaust holes 3 are evenly spaced on one side of the treatment box 1, located at the upper end of the purification zone, for discharging the purified gas. A liquid inlet pipe 4 is installed on the upper end of the treatment box 1, located on one side of the multiple exhaust holes 3, for replenishing the purification liquid to the purification zone. A liquid level height pipe 5 is installed on the side of the treatment box 1 away from the air inlet pipe 2. The liquid level height pipe 5 is connected to the purification zone inside the treatment box 1 to facilitate monitoring of the purification liquid level.

[0025] At the bottom of the separation zone, a collection box 6 is slidably connected to the lower end of the processing box 1 to collect the deposited dust particles and liquid droplets. A viewing window is provided on one side of the collection box 6 to facilitate the operator to judge the cleaning time in time. An inclined plate 12 is fixedly connected to the middle of the side of the vertical plate 8 near the sleeve 7. Multiple baffles 18 are evenly spaced on the inclined plate 12 to slow down the flow rate of the waste gas and guide the particles to settle, thereby improving the separation efficiency.

[0026] A float plate 9 is slidably connected in the purification zone. The float plate 9 has multiple holes. When the exhaust gas enters the purification liquid through the inlet pipe 10, it can form a uniform bubble distribution under the action of the float plate 9, prolonging the gas-liquid contact time and improving the absorption efficiency of harmful components.

[0027] In this embodiment, the servo motor 14 drives the fan blade 15 to quickly introduce high-temperature exhaust gas. The exhaust gas first forms a swirling flow and completes particle separation under the action of the sleeve 7 and the spiral blade 17. Then, it is introduced into the purification liquid through the inlet pipe 10 for absorption. At the same time, the purification liquid is kept at a low temperature under the synergistic action of the cooling pipe 11 and the circulating cooler 20, thereby significantly improving the purification effect. Example 2

[0028] This embodiment has the same basic structure as Embodiment 1, but the difference is that: the spiral blade 17 adopts a replaceable structure, and it is connected to the sleeve 7 through a slot, which makes it easy to adjust the blade angle and number according to the dust content of the exhaust gas to adapt to different production conditions; the cooling pipe 11 adopts a double spiral channel 19 design, which can increase the contact area between the coolant and the pipe wall within the same length compared with the single spiral structure, thereby improving the heat exchange efficiency; the collection box 6 adopts a drawer-type structure with rollers at the bottom, which makes it easy for operators to quickly pull out and clean it during equipment operation intervals, reducing maintenance time; the float 9 is a hollow buoyancy structure made of corrosion-resistant polypropylene material, which can automatically float up and down according to the exhaust gas flow rate to ensure a stable gas-liquid contact area.

[0029] The above improvements further enhance the efficiency of the exhaust gas cooling and separation process, and significantly improve the ease of equipment maintenance and long-term stable purification effect.

[0030] The specific operating principle of this utility model is as follows: First, when the high-temperature exhaust gas generated by the nitriding furnace enters the device through the inlet pipe 2, the servo motor 14 inside the inlet pipe 2 drives the fan blades 15 to rotate at high speed, forming an induced draft effect, which quickly sends the exhaust gas into the sleeve 7. The spiral blades 17 fixed inside the sleeve 7 generate a swirling flow of exhaust gas under the action of airflow, causing dust particles and oil mist droplets in the exhaust gas to be thrown towards the inner wall of the sleeve 7 under the action of centrifugal force, and discharged into the bottom of the separation zone through the through hole 16 on the sleeve 7 for deposition, which is then collected by the collection box 6, thereby achieving the initial separation of large particulate impurities in the exhaust gas.

[0031] Next, the exhaust gas after cyclone separation enters the bottom of the purification zone through the inlet pipe 10 on the vertical plate 8, and forms uniform and fine bubbles under the action of the porous structure of the float plate 9, so that the exhaust gas is fully dispersed in the purification liquid and comes into contact with the purification liquid for a long time, achieving efficient absorption of harmful gas components. At the same time, low-temperature coolant provided by the circulating cooler 20 is introduced into the cooling pipe 11 at the bottom of the purification zone. The coolant flows along a long path in the spiral channel 19, fully exchanging heat with the purification liquid, thereby continuously reducing the temperature of the purification liquid and improving its ability to absorb harmful gases.

[0032] Then, the clean gas, after sufficient cooling and purification, is discharged to the external environment through multiple exhaust ports 3 at the top of the treatment box 1. As operation continues, the solid deposits at the bottom of the separation zone and the liquid droplets in the collection box 6 can be monitored through the observation window and cleaned regularly to ensure long-term stable operation of the device. Throughout the process, the cyclone separation, gas-liquid absorption and low-temperature cooling links work together to achieve efficient cooling, purification and separation of the nitriding furnace exhaust gas.

[0033] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A device for treating exhaust gas from a nitriding furnace used in aluminum profile processing, characterized in that, The system includes a processing box (1), which is hollow inside. An air inlet pipe (2) is fixedly connected to the lower end of one side of the processing box (1). The air inlet pipe (2) is connected to the exhaust port of the nitriding furnace. An exhaust mechanism is provided inside the air inlet pipe (2) to quickly send the exhaust gas generated by the nitriding furnace into the processing box (1). A vertical plate (8) is fixedly connected to the middle of the processing box (1), and the vertical plate (8) divides the interior of the processing box (1) into a separation zone and a purification zone. The separation zone is located on the side near the air inlet pipe (2). A sleeve (7) is fixedly connected to one side of the inner wall of the separation zone. The sleeve (7) is connected to the air inlet pipe. (2) Coaxial, and the sleeve (7) is fixedly connected with a spiral blade (17). The surface of the sleeve (7) is evenly spaced with multiple through holes (16). The upper middle part of the vertical plate (8) is fixedly connected with an inlet pipe (10) on one side of the purification zone. The upper end of the inlet pipe (10) is connected to the separation zone and the lower end is located at the bottom of the purification zone. The inside of the treatment box (1) is provided with a cooling pipe (11) for cooling the internal purified liquid at the bottom of the purification zone. The inside of the cooling pipe (11) is provided with a spiral channel (19). The spiral channel (19) is used to increase the flow time of the cooling liquid inside the cooling pipe (11).

2. The waste gas treatment device for a nitriding furnace for aluminum profile processing according to claim 1, characterized by The exhaust mechanism includes a bracket (13) fixedly connected inside the air intake pipe (2), a servo motor (14) is installed in the middle of the bracket (13), the output end of the servo motor (14) faces the sleeve (7) and is fixedly connected with a fan blade (15).

3. The nitrogenizing furnace exhaust gas treatment device for aluminum profile processing according to claim 1, characterized by The lower end of the processing box (1) is slidably connected to a collection box (6) on one side of the sleeve (7). A viewing window is provided on one side of the collection box (6). An inclined plate (12) is fixedly connected to the middle of the end face of the upright plate (8) near the sleeve (7). Multiple baffles (18) are evenly spaced and fixedly connected to the end face of the inclined plate (12) near the sleeve (7).

4. The nitrogenizing furnace exhaust gas treatment device for aluminum profile processing according to claim 1, characterized by A floating plate (9) is slidably connected in the purification zone inside the treatment box (1), and multiple holes are provided on the floating plate (9).

5. The nitrogenizing furnace exhaust gas treatment device for aluminum profile processing according to claim 1, characterized by A circulating cooler (20) is provided at the lower end of one side of the processing box (1), and both ends of the cooling pipe (11) extend outside the processing box (1) and are connected to the circulating cooler (20).

6. The nitrogenizing furnace exhaust gas treatment device for aluminum profile processing according to claim 1, characterized by The processing box (1) has multiple vent holes (3) evenly spaced at the upper end of the purification zone on one side. The upper end of the processing box (1) is equipped with a liquid inlet pipe (4) on one side of the multiple vent holes (3). The processing box (1) is equipped with a liquid level pipe (5) on the side away from the air inlet pipe (2). The liquid level pipe (5) is connected to the purification zone inside the processing box (1).

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