A casting exhaust gas pre-treatment device

Abstract

The utility model relates to foundry waste gas purification field, concretely is a kind of foundry waste gas pretreatment device, including purification treatment jar, the purification treatment jar left end is provided with driving motor, the middle part of the bottom of purification treatment jar is provided with discharge pipe, the bottom of the outside of purification treatment jar is evenly provided with four support columns, the right end of purification treatment jar is provided with cooling tank, can be handled simultaneously dust, oil mist etc. Multicomponent pollutants in foundry waste gas by the cooperation of airflow drive assembly and impact ring assembly, make oil mist particle melt into big oil drop due to surface tension by the impact coalescence effect between waste gas, realize the synergistic removal to dust and oil mist, reduce the invalid consumption of purification material due to adhesion pollutant, prolong the replacement cycle of purification material, reduce operating cost, and waste gas preliminary treated by water body in water storage tank in purification treatment jar can be cooled, reduce equipment cleaning difficulty, maintain the stable operation of subsequent purification equipment.

Description

Technical Field

[0001] This utility model relates to the field of casting waste gas purification technology, specifically to a casting waste gas pretreatment device. Background Technology

[0002] Foundry resin sand refers to molding sand or core sand that uses synthetic resin as a binder for sand particles. It can be used as a filler and, after steps such as molding, curing, compaction and demolding, becomes a mold, which is then used to cast various finished products.

[0003] Some resin sand production processes generate certain odors and harmful gases, polluting the air and requiring appropriate waste gas treatment equipment. Volatile components in the resin, such as formaldehyde, phenol, furfuryl alcohol, and benzene compounds, volatilize violently during high-temperature casting, forming highly irritating and toxic organic gases. Particulate matter is generated during the handling and mixing of raw sand; and after casting, the pyrolysis residue of residual resin forms fine dust when the sand mold collapses. If these pollutants mix together and directly enter the waste gas treatment equipment, it will lead to decreased equipment efficiency and frequent malfunctions. Therefore, preliminary purification treatment of the generated waste gas is necessary. Its main function is to remove some pollutants from the waste gas, preparing it for subsequent deep purification. Creating favorable conditions for improving overall waste gas treatment efficiency and equipment lifespan is crucial. However, existing pretreatment methods are relatively simple, typically involving filtration to remove larger particles from the gas. This simple pretreatment approach cannot handle the complex environment of casting. When faced with a mixture of oil mist, dust, and high-temperature gases in casting waste gas, filtering particles alone will allow the oil mist and high-temperature gases to enter the purification equipment, potentially increasing the consumption of purification materials. Furthermore, the oil mist and resin volatiles in resin sand waste gas are in a molten or semi-fluid state at high temperatures, easily adhering to pipes and purification equipment, making cleaning difficult and affecting subsequent purification effects. Utility Model Content

[0004] This utility model addresses the technical problems existing in the prior art by providing a pretreatment device for foundry waste gas.

[0005] The technical solution of this utility model to solve the above-mentioned technical problems is as follows: A pretreatment device for foundry waste gas includes a purification tank. A drive motor is installed at the left end of the purification tank, and a discharge pipe is installed at the middle of the bottom end of the purification tank. Four support columns are evenly arranged on the outer side of the bottom end of the purification tank, and a cooling tank is installed at the right end of the purification tank. The purification tank includes a treatment tank body. An airflow drive assembly is rotatably connected to the left and right ends of the inner side of the treatment tank body. An impact ring assembly is fixedly connected to the inner wall of the treatment tank body, and the impact ring assembly is wrapped around the outer surface of the airflow drive assembly.

[0006] The beneficial effects of this utility model are as follows: By cooperating with the airflow drive component and the impact ring component, it can simultaneously treat multi-component pollutants such as dust and oil mist in casting waste gas. The dust adheres to the surface of the oil droplets to form oil-dust composite particles, reducing the ineffective consumption of purification materials due to the adhesion of pollutants, extending the replacement cycle of purification materials, and reducing operating costs. Furthermore, the waste gas that has been initially treated by the purification tank can be cooled by the water in the cooling tank, preventing the high-temperature and molten semi-fluid oil mist and resin volatiles from adhering to the pipes and core components of the subsequent purification equipment, reducing the difficulty of equipment cleaning, maintaining the stable operation of the subsequent purification equipment, and ensuring that the purification effect of the overall waste gas treatment system is not affected by the adhesion of pollutants. At the same time, the water in the heat exchange can recover heat energy, further reducing costs.

[0007] Furthermore, the airflow drive assembly includes a drive shaft that is rotatably connected to both the left and right ends of the processing tank. The left end of the drive shaft extends and is fixedly connected to the output end of the drive motor. A turbulence column is fixedly connected to the middle of the outer surface of the drive shaft. The turbulence column rotates together with the drive shaft and serves as the power source for subsequent components.

[0008] Furthermore, the outer surface of the turbulence column is provided with several spiral turbulence grooves, which are coiled around the outer surface of the turbulence column. A centrifugal fan is fixedly connected to the left end of the turbulence column, and a power turbofan is fixedly connected to the right side of the outer surface of the drive shaft. The spiral turbulence grooves create disturbances to the passing exhaust gas and change the flow state of the exhaust gas.

[0009] Furthermore, the impact ring assembly includes an impact ring one fixedly connected to the inner wall of the processing tank, a partition plate fixedly connected to the left end of the impact ring one, the partition plate completely covering the left end of the centrifugal fan, and an impact ring two whose outer surface is fixedly connected to the right end of the impact ring one, the centrifugal force generated by the centrifugal fan causing large dust particles to be thrown towards the impact ring.

[0010] Furthermore, several impact teeth are fixedly connected to the inner left side of the first impact ring and the inner left side of the second impact ring. Several liquid guiding grooves are formed on the inner right side of the second impact ring, and a dust collection groove is formed on the bottom side of the second impact ring. The inner side of the dust collection groove is connected to the discharge pipe. The triangular impact teeth cause the oil mist particles to fuse into large oil droplets due to surface tension through impact and agglomeration. The liquid guiding grooves guide the oil droplets and dust to fall into the dust collection groove, achieving synergistic removal of dust and oil mist, and preventing oil mist and unfiltered dust from directly entering subsequent purification equipment.

[0011] Furthermore, both the second impact ring and the inner wall of the liquid guide are arc-shaped, the impact teeth are triangular, and the impact teeth are made of polytetrafluoroethylene (PTFE). PTFE is oil-resistant and heat-resistant, providing a larger collision area.

[0012] Furthermore, the diameter of the second impact ring is smaller than that of the first impact ring, and several of the impact teeth are located at the centrifugal fan outlet. The liquid guide groove and the right end of the impact teeth are on the same plane, so that the exhaust gas is gradually compressed during the flow process, enhancing the effect of the impact teeth.

[0013] Furthermore, the cooling tank includes a water storage tank fixedly connected to the right end of the processing tank body. Two interconnected inlet and outlet water pipes are fixedly connected to the top of the water storage tank. Four air inlet pipes are fixedly connected to the left end of the inner side of the water storage tank. The left ends of the air inlet pipes extend into the interior of the processing tank body and are interconnected. The right ends of the four air inlet pipes are all fixedly connected to a common collecting circular pipe. The water inside the water storage tank that has completed heat exchange can recover heat energy and reduce energy loss.

[0014] Furthermore, two L-shaped and relatively mirror-symmetrical collection pipes are fixedly connected to the right end of the collection pipe. The two collection pipes are connected to the collection pipe, and the two collection pipes are fixedly connected to a common gas outlet pipe on opposite sides. The right end of the gas outlet pipe extends to the outside of the right end of the water storage tank, thus extending the path of the exhaust gas in the water storage tank. Attached Figure Description

[0015] Figure 1 This is a structural diagram of the present utility model; Figure 2 This is a cross-sectional view of the internal structure of the purification tank of this utility model; Figure 3 This is a structural diagram of the airflow drive component of this utility model; Figure 4 This is a structural diagram of the impact ring of this utility model; Figure 5 This is an assembly diagram of the airflow drive component and the impact ring of this utility model; Figure 6 This is a cross-sectional view of the interior of the cooling tank of this utility model.

[0016] The attached diagram lists the components represented by each number as follows: 1. Drive motor; 2. Purification tank; 21. Tank body; 22. Airflow drive assembly; 221. Drive shaft; 222. Centrifugal fan; 223. Baffle channel; 224. Baffle column; 225. Power turbo fan; 23. Impact ring assembly; 231. Separator plate; 232. Impact ring one; 233. Impact ring two; 234. Impact teeth; 235. Liquid guide channel; 236. Dust collection tank; 3. Cooling tank; 31. Inlet and outlet water pipes; 32. Water storage tank; 33. Air inlet pipe; 34. Collecting round pipe; 35. Collecting pipe; 36. Air outlet pipe; 4. Support column; 5. Discharge pipe. Detailed Implementation

[0017] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0018] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the stated features. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0019] In the description of this application, it should also be noted that, unless otherwise expressly specified and limited, the terms "set up," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this technology based on the specific circumstances.

[0020] In the description of this application, spatial relation terms such as "below," "under," "below," "below," "above," "over," etc., are used herein to describe the relationship between one element or feature shown in the figures and other elements or features. It should be understood that, in addition to the orientation shown in the figures, spatial relation terms also include different orientations of the device in use and operation. For example, if the device in the figures is flipped, an element or feature described as "below" or "under" other elements or features would be oriented "over" other elements or features. Therefore, the exemplary terms "below" and "under" can include both upper and lower orientations. Furthermore, the device may also include other orientations (e.g., rotated 90 degrees or other orientations), and the spatial descriptive terms used herein are interpreted accordingly.

[0021] In the description of this application, the term "for example" is used to mean "used as an example, illustration, or description." Any embodiment described as "for example" in this application is not necessarily to be construed as being more preferred or advantageous than other embodiments. The following description is provided to enable any person skilled in the art to implement and use the present invention. Details are set forth in the following description for purposes of explanation. It should be understood that those skilled in the art will recognize that the present invention can be implemented without using these specific details. In other instances, well-known structures and processes will not be described in detail to avoid obscuring the description of the present invention with unnecessary detail. Therefore, the present invention is not intended to be limited to the embodiments shown, but is consistent with the broadest scope of the principles and features disclosed in this application.

[0022] Example 1 Figure 1 This is a structural diagram of a foundry waste gas pretreatment device provided in an embodiment of the present invention. Figure 2 This is a cross-sectional view of the internal structure of the purification tank of this utility model. Figure 1 , Figure 2 As shown, the device includes a purification tank 2, a drive motor 1 at the left end of the purification tank 2, a discharge pipe 5 at the middle of the bottom end of the purification tank 2, four support columns 4 evenly arranged on the outer side of the bottom end of the purification tank 2, a cooling tank 3 at the right end of the purification tank 2, and a treatment tank body 21. An airflow drive assembly 22 is rotatably connected to the left and right ends of the inner side of the treatment tank body 21. An impact ring assembly 23 is fixedly connected to the inner wall of the treatment tank body 21, and the impact ring assembly 23 is wrapped around the outer surface of the airflow drive assembly 22.

[0023] The drive motor 1 drives the airflow drive component 22 inside the purification tank 2 to operate. After the exhaust gas enters the purification tank 2, it flows under the action of the airflow drive component 22. The dust, oil mist and other pollutants in it will interact with the impact ring component 23 during the movement. The exhaust gas after preliminary treatment then enters the cooling tank 3 for cooling treatment. The impurities generated during the treatment process are discharged through the discharge pipe 5. The entire device is stably supported by four support columns 4.

[0024] The treatment tank 21 provides a closed space for purification treatment. The airflow drive component 22 inside rotates under the action of power, driving the waste gas to flow inside the tank. The impact ring component 23 on the inner wall wraps around the outer surface of the airflow drive component 22, so that the flowing waste gas and the pollutants in it can fully contact the impact ring component 23 to achieve the initial purification and separation effect.

[0025] Figure 3 This is a structural diagram of the airflow drive component of this utility model. Figure 3As shown, the airflow drive assembly 22 includes a drive shaft 221 with both ends rotatably connected to the processing tank 21. The left end of the drive shaft 221 extends and is fixedly connected to the output end of the drive motor 1. A turbulence column 224 is fixedly connected to the middle of the outer surface of the drive shaft 221. Several spiral turbulence grooves 223 are opened on the outer surface of the turbulence column 224. Several turbulence grooves 223 are coiled around the outer surface of the turbulence column 224. A centrifugal fan 222 is fixedly connected to the left end of the turbulence column 224. A power turbo fan 225 is fixedly connected to the right side of the outer surface of the drive shaft 221.

[0026] Driven by the drive motor 1, the drive shaft 221 rotates. The central turbulence column 224 rotates together with the drive shaft 221. The spiral turbulence groove 223 on its outer surface disturbs the passing exhaust gas, changing the flow state of the exhaust gas. The centrifugal fan 222 rotates to generate centrifugal force, causing the particulate matter in the exhaust gas to move outward. The power turbine fan 225 at the right end further pushes the exhaust gas to the right in the treatment tank 21, providing power for the transmission of the exhaust gas.

[0027] Figure 4 This is a structural diagram of the impact ring of this utility model. Figure 5 This is an assembly diagram of the airflow drive component and the impact ring of this utility model. Figure 4 , Figure 5 As shown, the impact ring assembly 23 includes an impact ring 232 fixedly connected to the inner wall of the processing tank 21. A partition plate 231 is fixedly connected to the left end of the impact ring 232, and the partition plate 231 completely covers the left end of the centrifugal fan 222. An impact ring 233 is fixedly connected to the right end of the impact ring 232, and its outer surface is fixedly connected to the inner wall of the processing tank 21. Several impact teeth 234 are fixedly connected to the inner left side of the impact ring 232 and the inner right side of the impact ring 233. Several liquid guiding grooves 235 are opened on the inner right side of the impact ring 233. A dust collection groove 236 is opened on the bottom side of the impact ring 233, and the inner side of the dust collection groove 236 is connected to the discharge pipe 5.

[0028] Impact ring 232 is fixed to the inner wall of the treatment tank 21. The partition plate 231 at the left end covers the left end of the centrifugal fan 222, guiding the exhaust gas to flow into the inner side of impact ring 232. Impact ring 233 is also fixed to the inner wall of the tank. The impact teeth 234 on its inner side collide with the pollutants in the exhaust gas. The oil mist particles merge into large oil droplets due to surface tension. The dust adheres to the surface of the oil droplets during the fusion of oil mist particles, forming composite particles. The liquid guide groove 235 on the inner side of impact ring 233 guides the aggregated liquid and dust to the dust collection groove 236 on the bottom side, and finally discharges through the discharge pipe 5.

[0029] The inner walls of the second impact ring 233 and the liquid guiding groove 235 are both arc-shaped. The impact tooth 234 is triangular and made of polytetrafluoroethylene. The diameter of the second impact ring 233 is smaller than that of the first impact ring 232. Several impact teeth 234 are located at the outlet of the centrifugal fan 222. The right ends of the liquid guiding groove 235 and the impact tooth 234 are on the same plane.

[0030] The arc-shaped inner walls of impact ring 233 and liquid guide trough 235 facilitate the flow of agglomerated liquid and dust. The triangular impact teeth 234 are made of polytetrafluoroethylene, which is oil-resistant, high-temperature resistant, and can effectively impact pollutants. The diameter of impact ring 233 is smaller than that of impact ring 232, so that the exhaust gas is gradually compressed during the flow process, enhancing the effect of the impact teeth 234. The impact teeth 234 are located at the outlet of centrifugal fan 222, ensuring that the exhaust gas discharged from centrifugal fan 222 directly contacts the impact teeth 234. The liquid guide trough 235 and the right end of impact teeth 234 are on the same plane, ensuring that the agglomerates can smoothly enter the liquid guide trough 235.

[0031] Example 2 Based on Embodiment 1, the present invention can be further improved as follows, such as... Figure 6 As shown, the cooling tank 3 includes a water storage tank 32 fixedly connected to the right end of the processing tank 21. Two interconnected inlet and outlet water pipes 31 are fixedly connected to the top of the water storage tank 32. Four air inlet pipes 33 are fixedly connected to the left end of the inner side of the water storage tank 32. The left ends of the air inlet pipes 33 extend into the interior of the processing tank 21 and are interconnected. The right ends of the four air inlet pipes 33 are all fixedly connected to an interconnected collecting circular pipe 34. The right ends of the collecting circular pipe 34 are fixedly connected to two L-shaped and relatively mirror-symmetrical collecting pipes 35. The two collecting pipes 35 are interconnected with the collecting circular pipe 34. The opposite sides of the two collecting pipes 35 are all fixedly connected to an interconnected air outlet pipe 36. The right end of the air outlet pipe 36 extends to the outside of the right end of the water storage tank 32.

[0032] The water storage tank 32 of the cooling tank 3 contains water for cooling. The inlet and outlet water pipes 31 at the top facilitate the replacement and replenishment of water. The four air inlet pipes 33 on the inner left end introduce the pre-treated exhaust gas in the treatment tank 21 into the water storage tank 32. The exhaust gas enters the collecting circular pipe 34 through the air inlet pipe 33 and then flows further through two L-shaped and mirror-symmetrical collecting pipes 35, which prolongs the path of the exhaust gas in the water storage tank 32 and enhances the cooling effect. Finally, the cooled exhaust gas is discharged from the water storage tank 32 through the air outlet pipe 36. The water inside the water storage tank 32 that has completed heat exchange can recover heat energy and reduce energy loss.

[0033] While embodiments or examples of this disclosure have been described with reference to the accompanying drawings, it should be understood that the above embodiments are merely exemplary embodiments or examples, and the scope of this utility model is not limited by these embodiments or examples, but only by the granted claims and their equivalents. Various elements in the embodiments or examples may be omitted or replaced by their equivalents. Furthermore, the steps may be performed in a different order than that described in this disclosure. Further, various elements in the embodiments or examples may be combined in various ways. Importantly, as the technology evolves, many elements described herein can be replaced by equivalents that appear after this disclosure.

Claims

1. A pretreatment device for foundry waste gas, characterized in that, include: Purification tank (2), a drive motor (1) is provided at the left end of the purification tank (2), a discharge pipe (5) is provided at the middle of the bottom end of the purification tank (2), four support columns (4) are evenly provided on the outer side of the bottom end of the purification tank (2), and a cooling tank (3) is provided at the right end of the purification tank (2). The purification tank (2) includes a tank body (21). An airflow drive assembly (22) is rotatably connected to the left and right ends of the inner side of the tank body (21). An impact ring assembly (23) is fixedly connected to the inner wall of the tank body (21). The impact ring assembly (23) is wrapped around the outer surface of the airflow drive assembly (22).

2. The foundry waste gas pretreatment device according to claim 1, characterized in that, The airflow drive assembly (22) includes a drive shaft (221) that is rotatably connected to the processing tank (21) at both the left and right ends. The left end of the drive shaft (221) is extended and fixedly connected to the output end of the drive motor (1). A turbulence column (224) is fixedly connected to the middle of the outer surface of the drive shaft (221).

3. The foundry waste gas pretreatment device according to claim 2, characterized in that, The outer surface of the turbulence column (224) is provided with a number of spiral turbulence grooves (223), and the number of turbulence grooves (223) are coiled around the outer surface of the turbulence column (224). A centrifugal fan (222) is fixedly connected to the left end of the turbulence column (224), and a power turbofan (225) is fixedly connected to the right side of the outer surface of the drive shaft (221).

4. The foundry waste gas pretreatment device according to claim 1, characterized in that, The impact ring assembly (23) includes an impact ring one (232) fixedly connected to the inner wall of the processing tank (21), a partition plate (231) fixedly connected to the left end of the impact ring one (232), the partition plate (231) completely covering the left end of the centrifugal fan (222), and an impact ring two (233) whose outer surface is fixedly connected to the inner wall of the processing tank (21) at the right end of the impact ring one (232).

5. A pretreatment device for foundry waste gas according to claim 4, characterized in that, Several impact teeth (234) are fixedly connected to the inner left side of the first impact ring (232) and the inner left side of the second impact ring (233). Several liquid guiding grooves (235) are opened on the inner right side of the second impact ring (233). A dust collection groove (236) is opened on the bottom side of the second impact ring (233). The inner side of the dust collection groove (236) is connected to the discharge pipe (5).

6. The foundry waste gas pretreatment device according to claim 5, characterized in that, The inner walls of the impact ring (233) and the liquid guide groove (235) are both arc-shaped, the impact tooth (234) is triangular, and the impact tooth (234) is made of polytetrafluoroethylene.

7. A pretreatment device for foundry waste gas according to claim 6, characterized in that, The diameter of the second impact ring (233) is smaller than that of the first impact ring (232), and several impact teeth (234) are located at the outlet of the centrifugal fan (222). The liquid guide groove (235) and the right end of the impact teeth (234) are on the same plane.

8. The foundry waste gas pretreatment device according to claim 1, characterized in that, The cooling tank (3) includes a water storage tank (32) fixedly connected to the right end of the processing tank (21). The top of the water storage tank (32) is fixedly connected to two interconnected inlet and outlet water pipes (31). The left end of the inner side of the water storage tank (32) is fixedly connected to four air inlet pipes (33). The left end of the air inlet pipes (33) extends into the interior of the processing tank (21) and is interconnected. The right ends of the four air inlet pipes (33) are all fixedly connected to an interconnected collection round pipe (34).

9. A foundry waste gas pretreatment device according to claim 8, characterized in that, The right end of the collecting round tube (34) is fixedly connected to two L-shaped and relatively mirror-symmetrical collecting tubes (35). The two collecting tubes (35) are connected to the collecting round tube (34). The two collecting tubes (35) are fixedly connected to the opposite sides of the same air outlet pipe (36). The right end of the air outlet pipe (36) extends to the outside of the right end of the water storage tank (32).

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