Anti-caking plastic particle deodorizing and drying equipment

Abstract

The utility model discloses anti-caking plastic particle deodorizing and drying equipment, and belongs to the technical field of plastic particle extrusion processing. Comprising a material drying barrel; the circulating feeding machine is arranged at the top of the material drying barrel and used for feeding materials into the material drying barrel, and the materials form a continuous flowing path from top to bottom in the material drying barrel; the two ends of the material circulating pipeline are connected with the bottom of the material drying barrel and the circulating feeding machine correspondingly, and the materials form a flowing path from bottom to top in the material circulating pipeline; an air supply pipeline and an air return pipeline are connected between the hot air fan and the material drying barrel, a hot air circulation system is formed, and materials in the material drying barrel are dried through circularly conveyed hot air. By means of the material circulating system and the hot air circulating system, hot air can make more sufficient contact with particles, uniform heating is guaranteed, the situation that the particles are stacked and agglomerated after being molten due to local high temperature is avoided, the chance that volatile organic compounds (TVOC) and water volatilize out of the particles is increased, and the deodorizing and drying effect is improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of plastic particle extrusion processing, specifically relates to a kind of plastic particle deodorization drying equipment of anti-caking. BACKGROUND

[0002] After plastic particles are granulated by double screw extruder, higher level of total volatile organic compounds (TVOC) and moisture often remain inside the particles, which has adverse effects on subsequent processing, therefore, after plastic particles are formed, it must be effectively deodorized and dried.

[0003] Currently, the equipment for plastic particle deodorization and drying mainly includes the following types:

[0004] 1, hot air circulation drying box;

[0005] 2, hot air backflow furnace;

[0006] 3, hot air drying barrel.

[0007] The basic working principle of these devices is to heat the plastic particles with hot air to volatilize the residual TVOC and moisture in the particles, thereby reducing their content, however, the existing devices have some significant problems:

[0008] 1, uneven heating: resulting in poor treatment effect, it is difficult to ensure that all particles are fully treated;

[0009] 2, slow heating speed: reduces overall production efficiency and increases energy consumption cost;

[0010] 3, local temperature is too high: easy to cause plastic particle caking, not only affects product quality, but also may cause equipment failure. INVENTION CONTENTS

[0011] The utility model is directed to the above problems existing in prior art, and proposes a deodorization drying equipment with uniform heating and plastic particles not easy to cake.

[0012] The utility model can be realized by the following technical solutions:

[0013] A kind of plastic particle deodorization drying equipment of anti-caking, comprising:

[0014] Drying barrel;

[0015] Circulating feeder, it is set in the top of the drying barrel and is used to put material to the drying barrel, material forms continuous flow path from top to bottom in the drying barrel;

[0016] A material circulating pipeline is connected with the bottom of the material drying barrel and the circulating material feeding machine, and the material forms a flow path from bottom to top in the material circulating pipeline;

[0017] A hot air fan is connected with the material drying barrel through a supply air pipeline and a return air pipeline to form a hot air circulating system, and the material in the material drying barrel is dried by the circulating hot air.

[0018] As a further improvement of the present application, the material drying barrel is provided with multiple layers of cavities from top to bottom, and the cavities are connected with each other, air inlets and air outlets are arranged on the two sides of any cavity, each air inlet is connected with the supply air pipeline, and each air outlet is connected with the return air pipeline.

[0019] As a further improvement of the present application, air guide grooves are arranged on the inner wall of the cavity of the material drying barrel, and the air inlet is connected with the inside of the cavity of the material drying barrel through the air guide grooves.

[0020] As a further improvement of the present application, a plurality of air return guide grooves are arranged on the inner wall of the cavity of the material drying barrel, and the inside of the cavity of the material drying barrel is connected with the air outlet through the air return guide grooves.

[0021] As a further improvement of the present application, the air guide grooves and the air return guide grooves are arranged in multiple groups on the cavity of the material drying barrel, and the air guide grooves and the air return guide grooves in each group are arranged at intervals.

[0022] As a further improvement of the present application, the top of the air return guide groove is provided with a pointed end structure.

[0023] As a further improvement of the present application, a group of air return guide grooves are arranged at intervals by a plurality of independent slots.

[0024] As a further improvement of the present application, the air guide grooves are provided in a long strip structure.

[0025] As a further improvement of the present application, the return air pipeline is provided with an air outlet.

[0026] As a further improvement of the present application, the bottom of the material drying barrel is provided with a discharge port, and the inlet end of the material circulating pipeline is connected to the side of the discharge port.

[0027] Compared with the prior art, the present application has the following advantages:

[0028] 1. By designing a material circulation system, plastic particles can form a continuous downward flow path within the drying barrel. This flow pattern effectively avoids particle accumulation and disperses the gravitational force between particles, thereby reducing the likelihood of clumping.

[0029] 2. The material is constantly turned over and redistributed during circulation, which helps the hot air and particles to make more complete contact, ensuring that each particle is evenly heated. This method can significantly improve the uniformity and efficiency of heating compared to static heating.

[0030] 3. The presence of the material circulation system allows the material to pass through the high-temperature area multiple times during the drying process, increasing the opportunity for volatile organic compounds (TVOC) and moisture to volatilize from the particles, thereby improving the deodorizing and drying effect.

[0031] 4. The hot air circulation system uses heated air continuously, allowing heat to be more evenly distributed throughout the drying barrel. This not only improves the material's heating speed but also ensures that all plastic particles are fully heated, effectively volatilizing residual TVOC and moisture.

[0032] 5. Uniform hot air distribution helps maintain the overall temperature balance of the material, reducing the risk of plastic particle melting and clumping caused by local high temperatures.

[0033] 6. The top of the return air guide slot is designed as a pointed structure (such as a triangle), which can effectively disperse the gravity generated when the material accumulates above the guide slot. The pointed shape reduces the planar contact area and reduces the adhesion between particles and the return air guide slot, thereby avoiding the problem of clumping caused by concentrated accumulation and indirectly promoting material flow. BRIEF DESCRIPTION OF DRAWINGS

[0034] Fig. 1 is a schematic diagram of the plastic particle deodorizing and drying equipment of the present application;

[0035] Fig. 2 is a schematic diagram of a single cavity of the drying barrel of the present application.

[0036] In the figure, 100, drying barrel; 101, air inlet; 102, return air outlet; 103, air inlet guide slot; 104, return air guide slot; 105, discharge port; 110, circulating feeder; 120, material circulation pipeline; 130, hot air fan; 131, air supply pipeline; 1311, heater; 132, return air pipeline; 1321, exhaust port. DETAILED DESCRIPTION

[0037] The utility model provides a specific embodiment below and further describes the technical method of the utility model in combination with drawings, but the utility model is not limited to these embodiments.

[0038] As Figs. 1-2 Indicated, the utility model provides a kind of plastic particle deodorization drying equipment of anti-caking, comprising:

[0039] Material drying barrel 100, for drying deodorization to material (plastic particle), to meet the requirement of plastic particle to TVOC content and moisture content;

[0040] Circulating feeding machine 110, it is set in material drying barrel 100 top and is used to put material to material drying barrel 100, material forms the continuous flow path from top to bottom in material drying barrel 100;

[0041] Material circulation pipeline 120, its both ends are connected with the bottom of material drying barrel 100 and circulating feeding machine 110 respectively, and material forms the flow path from bottom to top in material circulation pipeline 120;

[0042] Hot air fan 130, it is connected with the air supply duct 131 and return air duct 132 between material drying barrel 100 and forms hot air circulation system, air supply duct 131 is equipped with heater 1311, and material in material drying barrel 100 is dried by the hot air of circulating delivery.

[0043] Worth mentioning is, the plastic particle deodorization drying equipment provided in the embodiment is integrated with material circulation system and hot air circulation system, wherein,

[0044] The setting of material circulation system at least brings following advantages:

[0045] 1, prevent caking: by designing material circulation system, plastic particle can form the continuous flow path from top to bottom in material drying barrel 100, and this flow mode effectively avoids the accumulation of particles, disperses the gravity effect between particles, to reduce the possibility of caking.

[0046] 2, uniform heating: material is constantly turned over and redistributed during circulation, which helps hot air and particles to contact more fully, ensuring that each particle can be uniformly heated, compared with static heating mode, this mode can significantly improve the uniformity and efficiency of heating.

[0047] 3, improve processing effect: the existence of material circulation system makes material can pass through high-temperature area multiple times during drying, increases the opportunity of volatile organic compounds (TVOC) and moisture to volatilize from particles, thereby improving the effect of deodorization and drying.

[0048] The setting of hot air circulation system at least brings following advantages:

[0049] 1. Improved heating efficiency: The hot air circulation system allows the heated air to be continuously recycled, ensuring that heat is evenly distributed throughout the drying barrel 100. This not only increases the speed of material heating but also ensures that all plastic particles are fully heated, effectively removing residual TVOC and moisture.

[0050] 2. Significant energy saving: The hot air circulation system reduces heat loss by recycling hot air within the system. Compared to traditional single-pass heating methods, this design significantly reduces energy consumption, achieving the goal of energy saving and emission reduction.

[0051] 3. Avoiding material caking: Uniform hot air distribution helps maintain overall material temperature balance, reducing the risk of plastic particle melting and caking caused by local high temperatures.

[0052] In addition, the combination of material circulation system and hot air circulation system forms a double circulation mechanism. The continuous flow of material combined with the continuous circulation of hot air further improves the efficiency of odor removal and drying, and brings more significant anti-caking effect.

[0053] Preferably, the drying barrel 100 is provided with multiple layers of cavities from top to bottom, and each layer of cavities is connected to each other. Each layer of cavities is provided with a specific hot air guide structure to ensure that hot air and material can fully contact in each layer and promote the uniform flow of material.

[0054] Further description of the hot air circulation system is as follows:

[0055] Preferably, the drying barrel 100 is provided with multiple layers of cavities from top to bottom, and each layer of cavities is connected to each other. Each layer of cavities is provided with a specific hot air guide structure to ensure that hot air and material can fully contact in each layer and promote the uniform flow of material.

[0056] Specifically, the cavity of the drying barrel 100 is also provided with an air inlet guide groove 103 and an air return guide groove 104. The air inlet 101 is connected to the inside of the cavity of the drying barrel 100 through the air inlet guide groove 103. The hot air entering the cavity of the drying barrel 100 is guided to the air return port 102 through the air return guide groove 104, and finally returns to the hot air fan 130 through the air return pipeline 132 for reheating and recycling, forming a complete hot air circulation system.

[0057] It is worth mentioning here that in the present embodiment, the top of the return air guide groove 104 is designed in a pointed structure (for example, a triangle), which can effectively disperse the gravity generated when the material is accumulated above the guide groove. Due to the pointed shape, the contact area is reduced, and the adhesion between particles and between particles and the return air guide groove 104 is reduced, thereby avoiding the problem of material caking caused by concentrated accumulation, and indirectly promoting the flow of the material;

[0058] It is also because the return air guide groove 104 can avoid material accumulation that the flow path of the hot air is optimized, ensuring that the hot air can pass through the material layer more smoothly and return to the hot air fan 130, which helps to maintain a stable airflow pattern in the drying barrel 100, providing a more stable heating environment for the plastic particles, further improving the drying efficiency and deodorizing effect, and also helping to maintain the consistency of product quality,

[0059] Preferably, the air inlet guide groove 103 and the return air guide groove 104 are provided in multiple groups on the cavity of the drying barrel 100, and each group of air inlet guide grooves 103 and each group of return air guide grooves 104 are arranged at intervals, which can ensure that the hot air is more evenly distributed in the entire cavity. This design avoids the problem of local overheating or cold spots, improving the consistency and efficiency of heating.

[0060] Preferably, the air inlet guide groove 103 is designed in a long strip structure, which can make the hot air entering the drying barrel 100 spread uniformly along a longer direction. This design helps to expand the coverage of the hot air, ensuring that the hot air can contact the material more widely, while also being able to guide the airflow more stably, reducing the occurrence of turbulence, and ensuring the smoothness of the hot air flow when it enters the material layer. This not only helps to effectively transfer heat, but also avoids the scattering or irregular movement of the material caused by unstable airflow

[0061] Preferably, a group of return air guide grooves 104 is arranged at intervals by multiple independent slots. Since each slot is relatively small and independent, the possibility of large particle material entering the return air guide groove 104 and causing blockage is reduced, ensuring the stability and continuity of the equipment operation. At the same time, each slot can also disperse the gravity of the material, reducing the problem of caking caused by concentrated accumulation of the material.

[0062] Preferably, the return air duct 132 is also provided with an exhaust port 1321. Regular ventilation through the exhaust port 1321 can effectively remove volatile organic compounds such as TVOC released during the drying process from the drying barrel 100, avoiding the accumulation of these substances in the closed system, thereby significantly improving the deodorizing effect, and reducing the risk of re-adsorption of TVOC during the drying process, improving the purity of the final product.

[0063] Preferably, the bottom of the material drying barrel 100 is provided with a discharge port 105, and the inlet end of the material circulating pipeline 120 is connected to the side of the discharge port 105, and after the deodorization and drying of the material are completed, the material is discharged outward from the discharge port 105 and collected.

[0064] The technical means disclosed in the utility model scheme is not limited to the technical means disclosed in the above technical means, and also includes technical solutions composed of any combination of the above technical features. The above is the specific implementation of the utility model, and it should be pointed out that, for ordinary technical personnel in the technical field, some improvements and embellishments can be made without departing from the principle of the utility model, and these improvements and embellishments are also regarded as the protection scope of the utility model.

[0065] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the utility model embodiments are only used to explain the relative positional relationship, movement condition, etc. between components in a certain specific posture (as shown in the drawings), and if the specific posture changes, the directional indications also change accordingly.

[0066] In addition, in the utility model, the description of "first", "second", "one" and the like is only for the purpose of description, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first" and "second" can explicitly or implicitly include at least one of the features. In the description of the utility model, the meaning of "multiple" is at least two, such as two, three, etc. unless otherwise specifically limited. The terms "connection", "fixing" and the like should be understood broadly, for example, "fixing" can be fixed connection, can be detachable connection, or can be integrated; can be mechanical connection, can be electrical connection; can be directly connected, can be indirectly connected through an intermediate medium, can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise specifically limited. For ordinary skilled persons in the art, the specific meaning of the above terms in the utility model can be understood according to the specific situation.

[0067] The technical solutions of each embodiment of the utility model can be combined with each other, but must be based on the realization of ordinary skilled persons in the art, and when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, and is not within the protection scope required by the utility model.

[0068] The specific embodiments described herein are only illustrative of the spirit of the utility model. Those skilled in the art to which the utility model belongs can make various modifications or supplements to the described specific embodiments or replace them with similar ways, but without departing from the spirit of the utility model or exceeding the scope defined by the appended claims.

Claims

1. A deodorizing and drying device for preventing caking of plastic granules, characterized in that, include: Drying hopper; A circulating feeder is installed at the top of the drying hopper and is used to feed materials into the drying hopper, where the materials form a continuous flow path from top to bottom within the drying hopper. The material circulation pipe is connected at both ends to the bottom of the drying barrel and the circulating feeder, respectively, and the material forms an upward flow path in the material circulation pipe; A hot air blower is connected to the drying barrel by an air supply pipe and a return air pipe to form a hot air circulation system, which circulates hot air to dry the material in the drying barrel.

2. The anti-caking plastic granule deodorizing and drying equipment according to claim 1, characterized in that, The drying hopper has multiple cavities from top to bottom, and each cavity is interconnected. Each cavity has an air inlet and an air return outlet on both sides. Each air inlet is connected to the air supply duct, and each air return outlet is connected to the air return duct.

3. The anti-caking plastic granule deodorizing and drying equipment according to claim 2, characterized in that, An air inlet guide groove is provided on the inner wall of the drying barrel cavity, and the air inlet is connected to the inside of the drying barrel cavity through the air inlet guide groove.

4. The deodorizing and drying equipment for anti-caking plastic granules according to claim 3, characterized in that, The inner wall of the drying barrel is provided with several return air guide grooves, and the interior of the drying barrel is connected to the return air inlet through the return air guide grooves.

5. The anti-caking plastic granule deodorizing and drying equipment according to claim 4, characterized in that, Multiple sets of the air inlet guide groove and the air return guide groove are provided on the cavity of the drying barrel, and the air inlet guide groove and the air return guide groove are arranged at intervals.

6. The anti-caking plastic granule deodorizing and drying equipment according to claim 5, characterized in that, The top of the return air guide channel is designed with a pointed shape.

7. The anti-caking plastic granule deodorizing and drying equipment according to claim 5, characterized in that, A set of return air guide slots is composed of multiple independent slots spaced apart.

8. The anti-caking plastic granule deodorizing and drying equipment according to claim 3, characterized in that, The air inlet guide groove is designed in the form of a long strip.

9. The anti-caking plastic granule deodorizing and drying equipment according to claim 1, characterized in that, The return air duct is equipped with an exhaust port.

10. The anti-caking plastic granule deodorizing and drying equipment according to claim 1, characterized in that, The bottom of the drying hopper is provided with a discharge port, and the inlet end of the material circulation pipe is connected to the side of the discharge port.

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