Metal heat treatment exhaust gas purification device

Abstract

The present application relates to the field of waste gas purification, disclose a kind of metal heat treatment waste gas purification device.The present application, including base frame, one side outer surface of base frame is welded into gas pipe, the outer surface of the side of base frame away from gas pipe is welded outer filter tube, the lower surface of base frame is welded collection cavity, the upper surface of both sides of collection cavity is opened access gas pipe and outer filter tube passage, outer filter tube inner surface is movably connected with scraper, the outer surface of scraper is fixedly connected with blade, by welding access gas pipe, outer filter tube and base frame, and with the lower collection cavity communication, form stable and sealed primary purification flow channel.The combination design of scraper and blade in outer filter tube is particularly key.When oil droplet and particulate matter containing waste gas push blade rotation, can simultaneously drive scraper to rotate along outer filter tube inner wall.This design can continuously, actively scrape off condensate oil droplet and larger particulate matter adhered on pipe wall, prevent its accumulation and block flow channel.

Description

Technical Field

[0001] This invention belongs to the field of waste gas purification technology, specifically a waste gas purification device for metal heat treatment. Background Technology

[0002] Metal heat treatment exhaust gas purification device is a device used to treat oil mist, particulate matter and acidic gases generated during metal heat treatment. Its core function is to achieve efficient separation and harmless treatment of pollutants in exhaust gas through a multi-stage purification process, while recovering heat energy from the exhaust gas to reduce environmental pollution and energy consumption.

[0003] Existing waste gas purification equipment typically employs static filtration or simple spray structures, relying on physical barriers or chemical neutralization for purification. However, these systems generally suffer from problems such as easy clogging of the flow channels and high maintenance frequency. For example, oil mist and particulate matter easily adhere to the pipe walls as they flow through the purification channel, and long-term accumulation can lead to increased airflow resistance or even interruption, requiring frequent shutdowns for cleaning. Simultaneously, traditional equipment lacks a systematic recovery and utilization of waste heat from the waste gas, resulting in direct heat emissions and energy waste. Furthermore, the consumption status of purification reagents is difficult to monitor in real time, often leading to decreased purification efficiency due to reagent failure, failing to meet continuous and stable environmental protection requirements. In addition, insufficient mass transfer efficiency between waste gas and the purification medium hinders the complete reaction of acidic gases, further limiting the reliability of the purification effect.

[0004] Existing purification structures lack dynamic self-cleaning mechanisms and directional impurity collection designs, making it impossible to maintain unobstructed flow channels during continuous operation, which is a key factor restricting purification efficiency and operation and maintenance costs. Summary of the Invention

[0005] The purpose of this invention is to provide a metal heat treatment waste gas purification device in order to solve the problems mentioned above.

[0006] The technical solution adopted in this invention is as follows: A metal heat treatment exhaust gas purification device includes a base frame, an inlet gas pipe welded to one outer surface of the base frame, an outer filter pipe welded to the outer surface of the base frame away from the inlet gas pipe, a collection chamber welded to the lower surface of the base frame, passages opened on the upper surfaces of both sides of the collection chamber corresponding to the inlet gas pipe and the outer filter pipe, a scraper movably connected to the inner surface of the outer filter pipe, and blades fixedly connected to the outer surface of the scraper.

[0007] By adopting the above technical solution, a stable and sealed primary purification channel is formed by welding the inlet pipe, external filter pipe, and base frame together and connecting them to the lower collection chamber. The combination design of the scraper and blades installed inside the external filter pipe is particularly crucial. When exhaust gas containing oil droplets and particulate matter drives the blades to rotate, it simultaneously drives the scraper to rotate along the inner wall of the external filter pipe. This design continuously and actively scrapes away condensed oil droplets and larger particles adhering to the pipe wall, preventing their accumulation and blockage of the flow channel, ensuring smooth airflow. The scraped impurities fall into the collection chamber under gravity through a specially designed channel, achieving preliminary and efficient separation and automatic collection of impurities, reducing maintenance frequency.

[0008] In a preferred embodiment, a water inlet valve is provided on the upper outer surface of the base frame, and a water outlet valve is provided on the lower outer surface of the base frame.

[0009] By adopting the above technical solution, the inlet valve can easily replenish the cooling medium to the annular pipe array in the base frame to continuously cool the high-temperature exhaust gas and promote oil mist condensation. When the outlet valve is closed, it works with the water pump to realize the internal circulation of the system and maximize heat recovery. When it is open, the hot water generated by the heat exchange can be directly exported to the external heat-using unit, realizing the effective utilization of waste heat in the exhaust gas and improving energy utilization efficiency.

[0010] In a preferred embodiment, an inclined connecting pipe is fixedly connected to the outer surface of the outer filter tube, and a right-angle bend is fixedly connected to the outer surface of the other end of the inclined connecting pipe.

[0011] By adopting the above technical solution, after the initial screening of the metal heat treatment of the device is completed, the inclined connecting pipe receives impurities at an inclination and then slides back to the external filter pipe to avoid inertia rushing into the next process. The right-angle bend and guide pipe introduce the waste gas.

[0012] In a preferred embodiment, a purification bucket is fixedly connected to the outer surface of the end of the right-angle bend away from the inclined connecting pipe, and a guide pipe is provided on the inner surface of the purification bucket corresponding to the right-angle bend.

[0013] By adopting the above technical solution, the guide pipe extends to the bottom of the purification tank's inner cavity, forcing the exhaust gas to be discharged from below the purification liquid surface. This increases the contact area and contact time between the exhaust gas and the chemical filter reagent inside the tank, allowing the acidic gas components in the exhaust gas to fully neutralize or be absorbed by the reagent.

[0014] In a preferred embodiment, a cover plate is movably connected to the upper surface of the purification tank, and an observation window is provided on the outer surface of the purification tank.

[0015] By adopting the above technical solution, the cover plate that is movably connected to the purification tank and the observation window set on the outer surface together improve the ease of use and maintainability of the device. The cover plate is easy for operators to open to add or replace the filter reagent in the purification tank, while the observation window allows personnel to intuitively observe the liquid level, color change or turbidity of the purification reagent without stopping the machine or opening the cover plate, thereby conveniently judging the reagent consumption or contamination status.

[0016] In a preferred embodiment, a pH monitor is provided on the outer surface of the purification tank, and a buzzer is fixedly connected to the outer surface of the pH monitor.

[0017] By adopting the above technical solution, the pH monitor can monitor the acidity and alkalinity of the purification reagent solution in real time. When the acidic components in the exhaust gas are continuously absorbed, causing the acidity of the reagent to increase to the preset critical value, it indicates that the neutralization capacity of the reagent is close to saturation. The pH monitor will then trigger the buzzer to issue an audible and visual alarm, promptly reminding the operator to replace or replenish the reagent.

[0018] In a preferred embodiment, a pH monitor is provided on the outer surface of the purification tank, and a buzzer is fixedly connected to the outer surface of the pH monitor.

[0019] By adopting the above technical solution, the water pump drives the cooling medium to flow between the jacket of the purification tank and the external heat exchanger. On the one hand, it can more effectively remove the heat that may be generated in the purification tank due to the chemical reaction and maintain a better reagent reaction temperature. On the other hand, it can systematically recover the waste heat in the exhaust gas and transfer it to the cooling medium, and finally output usable hot water through the outlet valve.

[0020] In a preferred embodiment, the bottom horizontal plane of the outer inner diameter of the access tube is higher than the bottom of the inner inner diameter, and the inner diameter of the access tube is larger than the inner diameter of the outer filter tube.

[0021] By adopting the above technical solution and the specific structural design of the inlet pipe, namely, the bottom of its outer inner diameter is higher than the inner side, and the overall inner diameter is larger than the inner diameter of the outer filter pipe, this design can increase the exhaust gas velocity when entering the filter pipe, improve the driving efficiency of the blades, and at the same time reduce the static pressure, which is conducive to the exhaust gas staying in the annular array pipe of the base frame for a longer time, thereby conducting more sufficient heat exchange with the cold wall and enhancing the condensation effect.

[0022] In a preferred embodiment, the inner surface of the inlet trachea is provided with a spiral groove, and the outer surface of the collection chamber is detachably connected to a storage box.

[0023] By adopting the above technical solution, the spiral groove causes the airflow to rotate before entering the base frame. This is beneficial for the particles in the airflow to move towards the pipe wall under the action of centrifugal force, and to collide and aggregate with the condensate film on the pipe wall, thereby separating some larger and heavier impurities in advance and reducing the load on the subsequent scraper.

[0024] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0025] In this invention, a stable and sealed primary purification channel is formed by welding the inlet pipe, external filter pipe, and base frame together and connecting them to the lower collection chamber. The combination design of the scraper and blades located inside the external filter pipe is particularly crucial. When exhaust gas containing oil droplets and particulate matter drives the blades to rotate, it simultaneously drives the scraper to rotate along the inner wall of the external filter pipe. The beneficial effects of this design are: it can continuously and actively scrape away condensed oil droplets and larger particles adhering to the pipe wall, preventing their accumulation and blockage of the flow channel, ensuring smooth airflow; the scraped impurities fall into the collection chamber under gravity through a specially designed channel, achieving preliminary and efficient separation and automatic collection of impurities, reducing maintenance frequency. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the external appearance of the device of the present invention;

[0027] Figure 2 This is a schematic diagram of the purification structure of the device in this invention;

[0028] Figure 3 This is a view of the preprocessing output side of the device in this invention;

[0029] Figure 4 This is a schematic diagram of the internal structure of the basic frame in this invention;

[0030] Figure 5 This is a schematic diagram of the front view of the trachea in this invention.

[0031] The diagram shows the following markings: 1. Base frame; 2. Air inlet pipe; 3. External filter pipe; 4. Collection chamber; 5. Scraper; 6. Blade; 7. Inlet valve; 8. Outlet valve; 9. Inclined connecting pipe; 10. Right-angle bend; 11. Purification tank; 12. Guide pipe; 13. Water pump; 14. Inlet pipe; 15. Return pipe; 16. Cover plate; 17. Observation window; 18. pH monitor; 19. Buzzer; 20. Spiral groove; 21. Storage box. Detailed Implementation

[0032] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0033] Example:

[0034] Reference Figure 1-5 A metal heat treatment exhaust gas purification device includes a base frame 1, an inlet pipe 2 welded to one outer surface of the base frame 1, an outer filter pipe 3 welded to the outer surface of the base frame 1 away from the inlet pipe 2, a collection chamber 4 welded to the lower surface of the base frame 1, passages opened on the upper surfaces of both sides of the collection chamber 4 corresponding to the inlet pipe 2 and the outer filter pipe 3, a scraper 5 movably connected to the inner surface of the outer filter pipe 3, and blades 6 fixedly connected to the outer surface of the scraper 5.

[0035] By welding the inlet pipe 2 and the outer filter pipe 3 to the base frame 1 and connecting them to the lower collection chamber 4, a stable and sealed primary purification channel is formed. The combination design of the scraper 5 and blade 6 located inside the outer filter pipe 3 is particularly crucial. When exhaust gas containing oil droplets and particulate matter drives the blade 6 to rotate, it simultaneously drives the scraper 5 to rotate along the inner wall of the outer filter pipe 3. The beneficial effects of this design are: it can continuously and actively scrape away condensed oil droplets and larger particles adhering to the pipe wall, preventing their accumulation and blockage of the flow channel, ensuring smooth airflow. The scraped impurities fall into the collection chamber 4 under gravity through a specially designed channel, achieving preliminary and efficient separation and automatic collection of impurities, reducing maintenance frequency.

[0036] Reference Figure 1-5 A water inlet valve 7 is provided on the upper outer surface of the foundation frame 1, and a water outlet valve 8 is provided on the lower outer surface of the foundation frame 1.

[0037] The inlet valve 7 facilitates the replenishment of cooling medium to the annular pipe array within the base frame 1 to continuously cool the high-temperature exhaust gas and promote oil mist condensation. When the outlet valve 8 is closed, it works in conjunction with the water pump 13 to achieve internal circulation within the system and maximize heat recovery. When open, it can directly export the hot water generated through heat exchange to external heat-using units, effectively utilizing the waste heat in the exhaust gas and improving energy efficiency.

[0038] Reference Figure 1-5 An inclined connecting pipe 9 is fixedly connected to the outer surface of the outer filter pipe 3, and a right-angle bend pipe 10 is fixedly connected to the outer surface of the other end of the inclined connecting pipe 9.

[0039] After the initial screening of the metal heat treatment of the device is completed, the inclined connecting pipe 9 receives impurities at an angle and then slides back to the outer filter pipe 3 to avoid inertia rushing into the next process. The right-angle bend pipe 10 and the guide pipe 12 introduce the waste gas.

[0040] Reference Figure 1-5 A purification tank 11 is fixedly connected to the outer surface of the right-angle bend 10 away from the inclined connecting pipe 9. A guide pipe 12 is provided on the inner surface of the purification tank 11 corresponding to the right-angle bend 10.

[0041] The guide pipe 12 extends to the bottom of the inner cavity of the purification tank 11, forcing the exhaust gas to be discharged from below the surface of the purification liquid. This increases the contact area and contact time between the exhaust gas and the chemical filter reagent inside the tank, allowing the acidic gas components in the exhaust gas to fully neutralize or be absorbed by the reagent.

[0042] Reference Figure 1-5 A cover plate 16 is movably connected to the upper surface of the purification tank 11, and an observation window 17 is provided on the outer surface of the purification tank 11.

[0043] The cover 16, which is movably connected to the purification tank 11, and the observation window 17 on the outer surface together improve the ease of use and maintainability of the device. The cover 16 is easy for operators to open to add or replace the filter reagent in the purification tank 11, while the observation window 17 allows personnel to directly observe the liquid level, color change, or turbidity of the purification reagent without stopping the machine or opening the cover, thereby conveniently judging the reagent consumption or contamination status.

[0044] Reference Figure 1-5 A pH monitor 18 is installed on the outer surface of the purification tank 11, and a buzzer 19 is fixedly connected to the outer surface of the pH monitor 18.

[0045] The pH monitor 18 can monitor the acidity and alkalinity of the purification reagent solution in real time. When the acidic components in the exhaust gas are continuously absorbed, causing the acidity of the reagent to increase to the preset critical value, it indicates that the neutralization capacity of the reagent is close to saturation. The pH monitor 18 will then trigger the buzzer 19 to issue an audible and visual alarm, promptly reminding the operator to replace or replenish the reagent.

[0046] Reference Figure 1-5 A pH monitor 18 is installed on the outer surface of the purification tank 11, and a buzzer 19 is fixedly connected to the outer surface of the pH monitor 18.

[0047] The water pump 13 drives the cooling medium to flow between the jacket of the purification tank 11 and the external heat exchanger. On the one hand, it can more effectively remove the heat that may be generated in the purification tank 11 due to the chemical reaction and maintain a better reagent reaction temperature. On the other hand, it systematically recovers the waste heat in the exhaust gas and transfers it to the cooling medium, and finally outputs usable hot water through the water outlet valve 8.

[0048] Reference Figure 1-5 The bottom horizontal plane of the outer inner diameter of the inlet tube 2 is higher than the bottom of the inner inner diameter, and the inner diameter of the inlet tube 2 is larger than the inner diameter of the outer filter tube 3.

[0049] The specific structural design of the inlet pipe 2, namely that the bottom of its outer inner diameter is higher than the inner diameter, and the overall inner diameter is larger than the inner diameter of the outer filter pipe 3, can increase the exhaust gas flow rate when entering the filter pipe, improve the driving efficiency of the blades 6, and at the same time reduce the static pressure, which is conducive to the exhaust gas staying in the annular array pipe of the base frame 1 for a longer time, thereby conducting more sufficient heat exchange with the cold wall and enhancing the condensation effect.

[0050] Reference Figure 1-5 The inner surface of the inlet tube 2 is provided with a spiral groove 20, and the outer surface of the collection chamber 4 is detachably connected with a storage box 21.

[0051] The spiral groove 20 causes the airflow to rotate before entering the base frame 1. This is beneficial for the particles in the airflow to move towards the pipe wall under the action of centrifugal force, and to collide and aggregate with the condensate film on the pipe wall, thereby separating some larger and heavier impurities in advance and reducing the load on the subsequent scraper 5.

[0052] The implementation principle of an embodiment of the metal heat treatment waste gas purification device of the present invention is as follows:

[0053] The purification device consists of a base frame 1 forming the front support body, which, together with the inlet pipe 2 and the external filter pipe 3, constitutes the main functional components for preliminary screening after metal heat treatment. Exhaust gas enters from the outer side of the inlet pipe 2, and through the spiral groove 20, it easily forms a vortex and rotates forward. The contact area between the base frame 1 and the inlet pipe 2 consists of multiple annularly arranged pipes. The inner diameter of these pipes gradually narrows, thus increasing the pressure after the exhaust gas enters and reducing the gaps between particles, facilitating adhesion and the formation of large particles or oil droplets. The oil droplets attached to the annularly arranged pipes... Gravity causes the oil droplets to tilt towards the lower end of the inner wall near the inlet air pipe 2. Meanwhile, the oil droplets attached to the upper annular array of pipes tilt towards the lower end of the inner wall near the outer filter pipe 3. Airflow then propels the blades 6 to rotate, which in turn rotates the scraper 5. The scraper 5, attached to the inner wall of the outer filter pipe 3, only rotates, preventing the scraper 5 and blades 6 from detaching and scraping the oil droplets into the channel below the outer filter pipe 3. The collection chamber 4, corresponding to the inlet air pipe 2 and the outer filter pipe 3, collects the impurities and stores them in the collection box 21. During this period, the oil droplets are further processed by airflow... Cold water is added at water valve 7. Heat exchange occurs through the pipes arranged in a ring array inside the base frame 1, facilitating the condensation of waste impurities and increasing purification efficiency. After the initial screening by the metal heat treatment of the device, the inclined connecting pipe 9 receives impurities at an angle and then slides back down to the outer filter pipe 3, preventing them from being inertially flushed into the next process. The right-angle bend pipe 10 and the guide pipe 12 introduce the waste gas. The purification tank 11 consists of a central chamber and an outer surrounding chamber. The filter reagent is poured into the central chamber by opening the cover plate 16, and the horizontal plane is submerged at the bottom of the guide pipe 12. The observation window 17 facilitates personnel access. Observation shows that the pH monitor 18 has a built-in battery, a microcontroller circuit board, and a pH probe circuit. The probe contacts the filter reagent. The higher the concentration of metal electrons, the more acidic the solution tends to be. After setting the critical value, the buzzer 19 will generate an audible alarm. The chamber surrounding the purification tank 11 is connected to the inlet pipe 14 and the return pipe 15. When the outlet valve 8 is not opened, the device circulates internally. The water flows through the water pump 13 for heat exchange, which facilitates the utilization of waste heat. After the outlet valve 8 is opened, the hot water can be easily discharged to the required location for hot water utilization.

[0054] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A metal heat treatment exhaust gas purification device comprising a base frame (1), characterized in that: The base frame (1) has an inlet air pipe (2) welded to one outer surface. The base frame (1) has an outer filter pipe (3) welded to the outer surface away from the inlet air pipe (2). The base frame (1) has a collection chamber (4) welded to the lower surface. The upper surfaces of both sides of the collection chamber (4) have passages corresponding to the inlet air pipe (2) and the outer filter pipe (3). The inner surface of the outer filter pipe (3) is movably connected to a scraper (5). The outer surface of the scraper (5) is fixedly connected to a blade (6).

2. The metal heat treatment exhaust gas purification device according to claim 1, characterized by: The upper outer surface of the base frame (1) is provided with a water inlet valve (7), and the lower outer surface of the base frame (1) is provided with a water outlet valve (8).

3. The metal heat treatment exhaust gas purification device according to claim 1, characterized by: An inclined connecting pipe (9) is fixedly connected to the outer surface of the outer filter pipe (3), and a right-angle bend pipe (10) is fixedly connected to the outer surface of the other end of the inclined connecting pipe (9).

4. The metal heat treatment exhaust gas purification device according to claim 3, characterized by: A purification bucket (11) is fixedly connected to the outer surface of the right-angle bend (10) away from the inclined connecting pipe (9), and a guide pipe (12) is provided on the inner surface of the purification bucket (11) corresponding to the right-angle bend (10).

5. The metal heat treatment exhaust gas purification device according to claim 4, characterized by: The upper surface of the purification tank (11) is movably connected to a cover plate (16), and the outer surface of the purification tank (11) is provided with an observation window (17).

6. The metal heat treatment exhaust gas purification device according to claim 4, characterized by: A pH monitor (18) is provided on the outer surface of the purification tank (11), and a buzzer (19) is fixedly connected to the outer surface of the pH monitor (18).

7. The metal heat treatment exhaust gas purification device according to claim 4, characterized by: A pH monitor (18) is provided on the outer surface of the purification tank (11), and a buzzer (19) is fixedly connected to the outer surface of the pH monitor (18).

8. The metal heat treatment waste gas purification device according to claim 1, characterized in that: The bottom horizontal plane of the outer inner diameter of the access tube (2) is higher than the bottom of the inner inner diameter, and the inner diameter of the access tube (2) is larger than the inner diameter of the outer filter tube (3).

9. The metal heat treatment exhaust gas purification device according to claim 1, characterized by: The inner surface of the access tube (2) is provided with a spiral groove (20), and the outer surface of the collection chamber (4) is detachably connected with a storage box (21).

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