Blown film production matching waste gas treatment device
The blown film production unit, which employs a dual-processing mechanism combining venturi tubes and spray washing within the treatment chamber, solves the problem of incomplete volatile organic compound (VOC) treatment, achieving efficient purification and equipment protection, and improving waste gas treatment efficiency and equipment lifespan.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- NANTONG CHENGYETONG PRECISION TECHNOLOGY CO LTD
- Filing Date
- 2025-10-20
- Publication Date
- 2026-07-21
AI Technical Summary
Existing blown film production equipment is ineffective in treating volatile organic compounds, resulting in severe air pollution in the workshop. Furthermore, the moist filter cotton is easily contaminated by microorganisms, causing secondary pollution and increasing system resistance.
It adopts a dual treatment mechanism, combining venturi tube premixing and spray washing in the treatment chamber. Chemical decomposition is carried out by the agent, and exhaust gas is collected 360° using the annular air inlet pipe and air delivery pipe. Thorough purification is achieved through multi-stage filtration and agent mixing.
It achieves efficient removal of volatile organic compounds and particulate matter, thorough purification, reduces emissions of harmful substances, prevents microbial contamination, and improves treatment efficiency and equipment lifespan.
Smart Images
Figure CN224524437U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of blown film production, and specifically relates to an exhaust gas treatment device for blown film production supporting. Background Technique
[0002] The production raw material of the blown film uses plastic masterbatch. In the production processes of melting and extrusion, due to the airtightness of the processes, a large number of toxic and harmful odor bubbles are aggregated, which is harmful to the health of workshop production personnel.
[0003] To solve the above problems, a patent document with the publication number of CN219968764U discloses an exhaust gas treatment device for blown film production supporting, including a blown film die body for blowing out a plastic film and a plurality of extruder units fixedly connected to the blown film die body for providing molten materials. An exhaust gas treatment device is arranged above the blown film die body; this application can reduce the harm caused by odor gas to production personnel.
[0004] However, the treatment mechanism of this application is single and ineffective for gaseous pollutants. The main pollutants in the exhaust gas generated by blown film production are volatile organic compounds produced by the high-temperature decomposition and volatilization of molten plastics, such as olefins, benzene series, aldehydes, ketones, etc. These substances are gaseous molecules under normal temperature and pressure, not particulate matters. Due to the extremely small size of gaseous molecules, they can easily pass through the fiber gaps of the PP filter cotton. Therefore, the original device has almost no removal ability for the most main odor and harmful components. In addition, the wet PP filter cotton provides an excellent breeding ground for the growth of microorganisms such as bacteria and molds, which will not only cause more serious biological odor in the filter material itself, forming secondary pollution, but also cause damage and blockage of the filter material structure, increasing the system resistance. Therefore, an exhaust gas treatment device for blown film production supporting is proposed to solve the problems mentioned above. Content of the Utility Model
[0005] Aiming at the deficiencies of the prior art, the utility model provides an exhaust gas treatment device for blown film production supporting, which has a dual treatment mechanism, realizes the advantages of high exhaust gas treatment efficiency and thorough purification, and solves the problems mentioned in the above background technique.
[0006] To achieve the above purpose, the utility model provides the following technical solutions:
[0007] An exhaust gas treatment device for blown film production supporting, including a plastic film die body, an exhaust gas treatment device is arranged outside the plastic film die body, the exhaust gas treatment device includes an air delivery component, a negative pressure pipe, a treatment structure and a liquid storage component. Among them, a fan pipe is arranged between the air delivery component and the negative pressure pipe, and a driving component is arranged between the treatment structure and the liquid storage component;
[0008] The gas delivery assembly includes an air inlet pipe, a branch pipe, and a gas delivery pipe arranged sequentially from the inside to the outside. The two ends of the branch pipe are fixedly connected to the air inlet pipe and the gas delivery pipe, respectively. The air inlet pipe has an air inlet hole, and a shielding member is provided on the bottom side of the air inlet pipe to block the air inlet hole.
[0009] The negative pressure tube includes a throat tube, and expansion tubes are fixed at both ends of the throat tube. The two expansion tubes are funnel-shaped and symmetrically arranged. The two expansion tubes are respectively connected to the gas supply tube and the processing structure. A suction tube extending into the liquid storage component is installed on the bottom side of the throat tube.
[0010] Furthermore, both the air inlet pipe and the air delivery pipe are ring-shaped, and there are several branch pipes and several air inlets. The air inlet pipe is installed on the outer surface of the plastic film mold body.
[0011] Furthermore, the shielding component includes a baffle bolted to the bottom side of the air intake pipe. The baffle has through holes corresponding to several air intake holes inside, and a first filter plate can be detachably installed in each of the several through holes.
[0012] Furthermore, the processing structure includes a processing box, inside which a second filter plate is detachably installed, a pump body is fixedly installed on the outer wall of the processing box, and a spray pipe is fixedly installed on the top side of the processing box. Both the input and output ends of the pump body are flanged with infusion pipes, one of which is fixedly connected to the spray pipe.
[0013] Furthermore, a mounting platform is welded to the side wall of the processing tank, and the liquid storage assembly is located on the top side of the mounting platform. The liquid storage assembly includes a reagent tank fixed to the top side of the mounting platform. A stirring rod extending outward is rotatably mounted inside the reagent tank, and the end of the stirring rod is connected to the drive assembly.
[0014] Furthermore, the drive assembly includes a drive motor fixed to the top side of the mounting platform, and the output shaft of the drive motor is provided with a synchronizing element between the stirring rod and the pump body.
[0015] Furthermore, the synchronizing element includes two synchronizing pulleys, and a synchronizing belt drives between the two synchronizing pulleys. The two synchronizing pulleys are of different sizes, and the number of synchronizing elements is two.
[0016] Compared with the prior art, this utility model provides a waste gas treatment device for blown film production, which has the following beneficial effects:
[0017] 1. The exhaust gas treatment device for blown film production combines venturi tube premixing and spray washing in the treatment tank, forming a two-stage purification process of pretreatment and deep treatment. It has an extremely high removal rate for particulate matter and gaseous pollutants in the exhaust gas, so that exhaust gas treatment is no longer a simple physical filtration, but an effective chemical decomposition through agents, eliminating odors and harmful substances at the source, achieving the advantages of high treatment efficiency and thorough purification.
[0018] 2. The exhaust gas treatment device for blown film production features an annular air inlet and outlet pipe design, which can collect exhaust gas emitted around the blown film mold in 360° without dead angles. The collection efficiency is much higher than that of single-point collection. At the same time, the exhaust gas is filtered in two stages through the first and second filter plates, which can effectively remove impurities of different particle sizes from the exhaust gas and improve the quality of exhaust gas treatment.
[0019] 3. The waste gas treatment device for blown film production uses a drive component to rotate the stirring rod, which can prevent the reagent from settling, ensure uniform reagent concentration, and improve the reagent's effectiveness and treatment efficiency. Attached Figure Description
[0020] Figure 1 This is a perspective view of the entire utility model;
[0021] Figure 2 This is a bottom view of the entire utility model;
[0022] Figure 3 This is a bottom view of the air inlet of this utility model;
[0023] Figure 4 This is a cross-sectional view of the negative pressure pipe of this utility model;
[0024] Figure 5 This is a schematic diagram of the processing structure and driving components of this utility model.
[0025] In the diagram: 1. Main body of the plastic film mold; 2. Gas supply assembly; 21. Air inlet pipe; 22. Gas supply pipe; 23. Branch pipe; 24. Air inlet hole; 25. Baffle; 26. Through hole; 27. First filter plate; 3. Fan pipe; 4. Negative pressure pipe; 41. Throat pipe; 42. Expansion pipe; 43. Suction pipe; 5. Processing structure; 51. Processing box; 52. Second filter plate; 53. Pump body; 54. Spray pipe; 55. Liquid supply pipe; 6. Liquid storage assembly; 61. Chemical tank; 62. Stirring rod; 7. Drive assembly; 71. Drive motor; 72. Synchronous pulley; 73. Synchronous belt. Detailed Implementation
[0026] 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.
[0027] Please see Figures 1 to 5 This embodiment of a blown film production waste gas treatment device includes a plastic film mold body 1, wherein a pipe is installed between the plastic film mold body 1 and the extruder; a waste gas treatment device is provided outside the plastic film mold body 1, the waste gas treatment device includes a gas conveying component 2, a negative pressure pipe 4, a treatment structure 5 and a liquid storage component 6, wherein a fan pipe 3 is provided between the gas conveying component 2 and the negative pressure pipe 4, and a drive component 7 is provided between the treatment structure 5 and the liquid storage component 6.
[0028] In this embodiment, the gas supply assembly 2 includes an inlet pipe 21, a branch pipe 23, and a gas supply pipe 22 arranged sequentially from the inside to the outside. The two ends of the branch pipe 23 are fixedly connected to the inlet pipe 21 and the gas supply pipe 22, respectively. The inlet pipe 21 has an inlet hole 24. Specifically, the inlet pipe 21 and the gas supply pipe 22 are both annular in shape. The branch pipe 23 and the inlet hole 24 are both several in number. The annular layout can surround the plastic film mold body 1 in all directions, and can evenly collect the exhaust gas generated at different positions around the mold, avoiding the problem of insufficient collection of local exhaust gas, and greatly improving the efficiency and comprehensiveness of exhaust gas collection. The inlet pipe 21 is installed on the outer surface of the plastic film mold body 1.
[0029] It should be noted that a shielding component is provided on the bottom side of the air intake pipe 21 to block the air intake port 24. The shielding component includes a baffle 25 bolted to the bottom side of the air intake pipe 21. The baffle 25 has through holes 26 corresponding to several air intake ports 24 inside, and a first filter plate 27 can be detachably installed in several through holes 26. This can block the air intake port 24 on the bottom side of the air intake pipe 21, preventing large particles of impurities from directly entering the air delivery assembly 2 through the air intake port 24, avoiding these impurities from causing blockage or damage to subsequent processing equipment and pipelines, and extending the service life of the equipment.
[0030] In this embodiment, the negative pressure pipe 4 includes a throat 41, and expansion pipes 42 are fixed at both ends of the throat 41. The two expansion pipes 42 are flared in shape and symmetrically arranged. The two expansion pipes 42 are respectively connected to the gas supply pipe 22 and the processing structure 5. A suction pipe 43 extending into the liquid storage component 6 is installed on the bottom side of the throat 41. When the airflow enters the throat 41 from the expansion pipe 42 with a larger cross-section, the airflow velocity will increase sharply due to the sudden reduction of the channel cross-sectional area. According to the principle of fluid mechanics, the pressure will decrease when the fluid velocity increases, thereby forming a negative pressure zone at the throat 41. The negative pressure can effectively draw the waste gas in the gas supply pipe 22 into the negative pressure pipe 4, without the need for additional complex air extraction devices, thus reducing equipment costs and energy consumption.
[0031] To further improve the exhaust gas treatment effect, the treatment structure 5 includes a treatment box 51. A second filter plate 52 is detachably installed inside the treatment box 51. A pump body 53 is fixedly installed on the outer wall of the treatment box 51. A nozzle 54 is fixedly installed on the top side of the treatment box 51. Both the input and output ends of the pump body 53 are flanged with liquid delivery pipes 55, one of which is fixedly connected to the nozzle 54.
[0032] A mounting platform is welded to the side wall of the treatment tank 51. The liquid storage assembly 6 is located on the top side of the mounting platform. The liquid storage assembly 6 includes a reagent tank 61 fixed to the top side of the mounting platform. A stirring rod 62 is rotatably mounted inside the reagent tank 61 and extends outwards. The end of the stirring rod 62 is connected to the drive assembly 7. The bottom end of the suction pipe 43 extends into the interior of the reagent tank 61. When a negative pressure is formed at the throat 41, the reagent in the liquid storage assembly 6 will be drawn into the throat 41 through the suction pipe 43 under the action of the pressure difference. Due to the high airflow velocity at the throat 41, the reagent and the exhaust gas can be fully mixed and contacted here. The high-speed airflow disperses the reagent into fine droplets, increasing the contact area between the reagent and the pollutants in the exhaust gas, improving the absorption and reaction efficiency of the reagent on the pollutants in the exhaust gas, thereby enhancing the exhaust gas treatment effect.
[0033] In this embodiment, the drive assembly 7 includes a drive motor 71 fixed to the top side of the mounting platform. The output shaft of the drive motor 71 is provided with a synchronizing element between the stirring rod 62 and the pump body 53. Specifically, the synchronizing element includes two synchronizing pulleys 72, and a synchronizing belt 73 is connected between the two synchronizing pulleys 72. The two synchronizing pulleys 72 are of different sizes. There are two synchronizing elements. One synchronizing element has a synchronizing pulley 72 connected to the impeller of the pump body 53, and the other synchronizing pulley 72 is connected to the output shaft of the drive motor 71.
[0034] The working principle of the above embodiments is as follows:
[0035] The waste gas generated during the production process of the blown film mold body 1 is first drawn in through the air inlet 24 on the annular air inlet pipe 21. The first filter plate 27 performs preliminary filtration of the waste gas, intercepting larger plastic particles and dust. The waste gas is then collected into the annular air delivery pipe 22 through the branch pipe 23. The collected waste gas is then pressed into the negative pressure pipe 4 through the fan pipe 3. After the high-pressure waste gas enters the negative pressure pipe 4, it first passes through the front funnel-shaped expansion pipe 42, and the flow rate initially increases. When the airflow passes through the narrow throat 41, the flow rate reaches its maximum. According to Bernoulli's principle, the static pressure here drops to its lowest point, forming a strong vacuum negative pressure. At this time, the negative pressure draws up the liquid agent in the agent tank 61 through the suction pipe 43 and instantly injects it into the high-speed airflow. The agent is sheared and atomized into extremely small droplets by the high-speed airflow and is fully and violently mixed with the waste gas in the expansion pipe 42 at the rear end. The gas-liquid mixture enters the treatment tank 51.
[0036] Pump body 53 pumps liquid into nozzle 54 and sprays it into treatment tank 51 to form a dense liquid water curtain. When the exhaust gas passes through the second filter plate 52 and the liquid water curtain in treatment tank 51, the gaseous pollutants and the liquid droplets have sufficient chemical contact and are effectively decomposed and removed. After physical interception and deep chemical reaction in treatment tank 51, the exhaust gas is fully purified and finally meets the emission standards to the atmosphere or the next stage of treatment equipment.
[0037] The installation, connection, or setting methods disclosed in this embodiment are all common mechanical connection methods, and any method that achieves the desired beneficial effect can be implemented. Furthermore, all electrical components in this embodiment are electrically connected to the main controller and power supply. The main controller can be a conventional, known device such as a computer that performs control functions. Those skilled in the art can control the electrical components through simple programming, and the existing disclosed power connection technologies are common knowledge in the field. Therefore, this embodiment will not elaborate further on their specific structural composition and working principles.
[0038] It should be noted that the orientations or positional relationships indicated herein are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the purpose of facilitating the description of this application and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.
[0039] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.
[0040] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A waste gas treatment device for blown film production, comprising a plastic film mold body (1), characterized in that: The exterior of the plastic film mold body (1) is provided with a waste gas treatment device. The waste gas treatment device includes a gas conveying component (2), a negative pressure pipe (4), a treatment structure (5), and a liquid storage component (6). A fan pipe (3) is provided between the gas conveying component (2) and the negative pressure pipe (4), and a drive component (7) is provided between the treatment structure (5) and the liquid storage component (6). The gas delivery assembly (2) includes an air inlet pipe (21), a branch pipe (23) and a gas delivery pipe (22) arranged sequentially from the inside to the outside. The two ends of the branch pipe (23) are fixedly connected to the air inlet pipe (21) and the gas delivery pipe (22) respectively. The air inlet pipe (21) has an air inlet hole (24) and a shielding member is provided on the bottom side of the air inlet pipe (21) to shield the air inlet hole (24). The negative pressure tube (4) includes a throat tube (41), and both ends of the throat tube (41) are fixed with expansion tubes (42). The two expansion tubes (42) are horn-shaped and symmetrically arranged. The two expansion tubes (42) are respectively connected to the gas supply tube (22) and the processing structure (5). A suction tube (43) extending into the liquid storage component (6) is installed on the bottom side of the throat tube (41).
2. The waste gas treatment device for blown film production according to claim 1, characterized in that: The air inlet pipe (21) and the air delivery pipe (22) are both ring-shaped. The number of branch pipes (23) and air inlets (24) are several. The air inlet pipe (21) is installed on the outer surface of the plastic film mold body (1).
3. The waste gas treatment device for blown film production according to claim 2, characterized in that: The shielding component includes a baffle (25) bolted to the bottom side of the air intake pipe (21). The baffle (25) has through holes (26) corresponding to a plurality of air intake holes (24) inside, and a first filter plate (27) can be detachably installed in each of the plurality of through holes (26).
4. The waste gas treatment device for blown film production according to claim 1, characterized in that: The processing structure (5) includes a processing box (51), inside which a second filter plate (52) is detachably installed. A pump body (53) is fixedly installed on the outer wall of the processing box (51), and a nozzle (54) is fixedly installed on the top side of the processing box (51). Both the input and output ends of the pump body (53) are flanged with infusion pipes (55), one of which is fixedly connected to the nozzle (54).
5. The waste gas treatment device for blown film production according to claim 4, characterized in that: A mounting platform is welded to the side wall of the processing tank (51), and the liquid storage assembly (6) is located on the top side of the mounting platform. The liquid storage assembly (6) includes a reagent tank (61) fixed to the top side of the mounting platform. A stirring rod (62) extending outward is rotatably mounted inside the reagent tank (61), and the end of the stirring rod (62) is connected to the drive assembly (7).
6. The waste gas treatment device for blown film production according to claim 5, characterized in that: The drive assembly (7) includes a drive motor (71) fixed to the top side of the mounting platform. The output shaft of the drive motor (71) is provided with a synchronizing element between the stirring rod (62) and the pump body (53).
7. The waste gas treatment device for blown film production according to claim 6, characterized in that: The synchronizing element includes two synchronizing pulleys (72), and a synchronizing belt (73) is connected between the two synchronizing pulleys (72). The two synchronizing pulleys (72) are of different sizes, and the number of synchronizing elements is two.