A dryer for PP polypropylene plastic production

Abstract

This utility model relates to the field of polypropylene plastic drying technology, specifically to a dryer for PP polypropylene plastic production, comprising: a drying chamber; an air inlet drying assembly, the air inlet drying assembly including a partition fixedly installed inside the drying chamber, a circular box rotatably disposed between the partition and the drying chamber, the circular box containing a desiccant, and circulation grooves arranged in a circular array on both sides of the circular box; an installation pipe fixedly installed between the drying chamber and the circular box, and a fan rotatably installed on the inner wall of the installation pipe; and a dehumidification assembly, the dehumidification assembly being used to return the dried hot air to the desiccant disposed in the circulation grooves. This utility model, through the design of the dehumidification assembly and hot air circulation, significantly improves the dehumidification efficiency and heat utilization rate during the drying process, and utilizes the residual heat after drying to regenerate the desiccant, thus avoiding the problem of incomplete dehumidification in traditional equipment and effectively reducing energy consumption, achieving the production goal of energy saving and consumption reduction.

Description

Technical Field

[0001] This utility model relates to the field of polypropylene plastic drying technology, specifically to a dryer for PP polypropylene plastic production. Background Technology

[0002] PP (polypropylene) plastic is a thermoplastic widely used in packaging, automotive parts, household appliances and other fields. In some cases, especially materials stored in high humidity environments, PP (polypropylene) plastic may absorb moisture. In this case, it is necessary to dry it before processing. Taking a dryer for the production of plastic masterbatch disclosed in patent CN219235823U as an example, this utility model can achieve uniform drying of plastic masterbatch, avoid the accumulation of plastic masterbatch during the tumbling process, achieve the purpose of uniform heating, thereby accelerating the drying of plastic masterbatch, and avoiding the accumulation and blockage of plastic masterbatch during discharge. However, most common drying equipment adopts a vertical structure or a simple stirring and heating method, which has problems such as uneven heating of materials, low drying efficiency, and high energy consumption. In addition, most drying equipment lacks an effective dehumidification and hot air circulation mechanism, resulting in incomplete dehumidification and low heat utilization, which further restricts the improvement of drying effect and the optimization of equipment energy efficiency. Utility Model Content

[0003] In view of the above-mentioned shortcomings of the existing technology, the present invention provides a dryer for PP polypropylene plastic production, which can effectively solve the problem that the existing drying equipment lacks effective dehumidification and heat recovery.

[0004] To achieve the above objectives, this utility model provides the following technical solution: This utility model provides a dryer for PP polypropylene plastic production, comprising: Drying oven; An air inlet drying assembly includes a partition fixedly installed inside a drying chamber, a circular box rotatably disposed between the partition and the drying chamber, a desiccant disposed inside the circular box, flow grooves arranged in a circular array on both sides of the circular box, an installation pipe fixedly installed between the drying chamber and the circular box, and a fan rotatably installed on the inner wall of the installation pipe; A dehumidification component is used to return the dried hot air to the desiccant placed in the drying circulation tank.

[0005] Preferably, a fixing frame is fixedly installed on one side of the drying oven, and a sealing plate is slidably installed on the inner wall of the fixing frame.

[0006] Preferably, a support plate is fixedly installed between the partition and the drying box, and multiple air outlet slots are linearly arrayed in the support plate. A first fixed pipe is connected to one side of the drying box at the position of the corresponding installation pipe, and filter cotton is fixedly installed on the inner wall of the first fixed pipe.

[0007] Preferably, the mounting pipe is connected to a connecting pipe on the side near the circular box, the connecting pipe is airtightly slidably connected to the outer surface of the circular box, the partition is embedded with an air inlet pipe, the upper end of the air inlet pipe is airtightly slidably connected to one side of the circular box, the lower end of the air inlet pipe passes through the support plate and extends to the bottom of the support plate, and a heating device is fixedly installed inside the air inlet pipe.

[0008] Preferably, a rotary drive component is fixedly installed on one side of the drying oven. The output end of the rotary drive component passes through the partition and is fixedly installed with a transmission column. A cross-shaped fixing frame is fixedly installed at one end of the transmission column, and the outer wall of the cross-shaped fixing frame is fixedly connected to the circular box.

[0009] Preferably, a second fixing pipe is embedded on one side of the drying box, one end of the second fixing pipe is connected to a heat exchange box, a connecting pipe is connected on one side of the heat exchange box at the position corresponding to the second fixing pipe, the connecting pipe is airtightly slidably connected to one side of the circular box, an air outlet pipe is embedded on one side of the partition, one end of the air outlet pipe is airtightly slidably connected to one side of the circular box, a return pipe is connected to the upper end face of the heat exchange box, one end of the return pipe is connected to the upper end face of the drying box, an external connecting pipe is connected to the lower end face of the heat exchange box at the position corresponding to the return pipe, and a vertical plate is fixedly installed on the inner wall of the heat exchange box, with multiple heat-conducting fins linearly arrayed inside the vertical plate.

[0010] The technical solution provided by this utility model has the following advantages compared with the known prior art: 1. Through the design of dehumidification components and hot air circulation, the dehumidification efficiency and heat utilization rate during the drying process are significantly improved. The waste heat after drying is used to regenerate the desiccant, which not only avoids the problem of incomplete dehumidification of traditional equipment, but also effectively reduces energy consumption, which helps to achieve the production goal of energy saving and consumption reduction. 2. By using uniform air distribution and a rotating desiccant box structure, it overcomes the common problems of uneven material heating and low drying efficiency in traditional dryers. Its reasonable structural design and scientific hot air flow path ensure that PP polypropylene plastic is heated evenly during the drying process, thereby improving drying quality and overall production efficiency. Attached Figure Description

[0011] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0012] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a schematic diagram of the internal structure of the drying oven of this utility model; Figure 3 This is a schematic diagram of the air inlet drying assembly of this utility model; Figure 4 This is an exploded structural diagram of the heat exchange box of this utility model.

[0013] Reference numerals: 1. Drying oven; 101. Fixing frame; 102. Sealing plate; 2. Air inlet drying assembly; 201. Partition plate; 202. Support plate; 203. First fixing pipe; 204. Filter cotton; 205. Mounting pipe; 206. Fan; 207. Air inlet pipe; 208. Heating device; 209. Rotary drive component; 210. Transmission column; 211. Cross fixing bracket; 212. Circular box; 213. Flow channel; 3. Dehumidification assembly; 301. Second fixing pipe; 302. Heat exchange box; 303. Connecting pipe; 304. Air outlet pipe; 305. Return pipe; 306. External connecting pipe; 307. Vertical plate; 308. Heat-conducting fins. Detailed Implementation

[0014] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0015] The present invention will be further described below with reference to the embodiments.

[0016] Example: Refer to Figures 1 to 4 A dryer for producing PP polypropylene plastics, comprising: Drying oven 1; The air inlet drying assembly 2 includes a partition 201 fixedly installed inside the drying chamber 1. A circular box 212 is rotatably arranged between the partition 201 and the drying chamber 1. A desiccant is placed inside the circular box 212. Flow grooves 213 are arranged in a circular array on both sides of the circular box 212. An installation pipe 205 is fixedly installed between the drying chamber 1 and the circular box 212. A fan 206 is rotatably installed on the inner wall of the installation pipe 205. Dehumidification component 3 is used to return the dried hot air to the desiccant placed in the drying circulation channel 213.

[0017] Reference Figure 1 A fixed frame 101 is fixedly installed on one side of the drying oven 1, and a sealing plate 102 is slidably installed on the inner wall of the fixed frame 101.

[0018] Reference Figures 2 to 3 A support plate 202 is fixedly installed between the partition 201 and the drying chamber 1. Multiple air outlet slots are linearly arrayed inside the support plate 202. A first fixed pipe 203 is connected to one side of the drying chamber 1 at the position corresponding to the mounting pipe 205. A filter cotton 204 is fixedly installed on the inner wall of the first fixed pipe 203. By pushing the sealing plate 102 to slide inside the fixed frame 101, the PP polypropylene plastic to be dried is placed above the support plate 202. The fan 206 is turned on. After being filtered by the filter cotton 204, the outside air enters the mounting pipe 205 through the first fixed pipe 203, and then enters the interior of the circular box 212 through the connecting pipe and the flow channel 213. During this process, the air passes through the desiccant to complete dehumidification.

[0019] Reference Figures 2 to 3 The mounting pipe 205 is connected to a connecting pipe on the side near the circular box 212. The connecting pipe is airtightly and slidably connected to the outer surface of the circular box 212. An air inlet pipe 207 is embedded in the partition plate 201. The upper end of the air inlet pipe 207 is airtightly and slidably connected to one side of the circular box 212. The lower end of the air inlet pipe 207 passes through the support plate 202 and extends to the bottom of the support plate 202. A heating device 208 is fixedly installed inside the air inlet pipe 207. After dehumidification, the air enters the air inlet pipe 207, is heated by the heating device 208, and is evenly sprayed out from the air outlet groove below the support plate 202 to dry the PP polypropylene plastic. It should be noted that the circular box 212 is equipped with a baffle to divide the flow channel 213 into multiple independent sections, ensuring that the air can only enter the air inlet pipe 207 horizontally through the flow channel 213 of the current section, avoiding airflow short circuit or insufficient dehumidification.

[0020] Reference Figures 2 to 3A rotary drive component 209 is fixedly installed on one side of the drying oven 1. The rotary drive component 209 uses an existing motor. The output end of the rotary drive component 209 passes through the partition 201 and is fixedly installed with a transmission column 210. A cross-shaped fixing bracket 211 is fixedly installed at one end of the transmission column 210. The outer wall of the cross-shaped fixing bracket 211 is fixedly connected to the circular box 212.

[0021] Reference Figures 3 to 4 A second fixing pipe 301 is embedded on one side of the drying oven 1. One end of the second fixing pipe 301 is connected to a heat exchange box 302. A connecting pipe 303 is connected to one side of the heat exchange box 302 at a position corresponding to the second fixing pipe 301. The connecting pipe 303 is airtightly slidably connected to one side of the circular box 212. An air outlet pipe 304 is embedded on one side of the partition 201. One end of the air outlet pipe 304 is airtightly slidably connected to one side of the circular box 212. A return pipe 305 is connected to the upper end face of the heat exchange box 302. One end of the return pipe 305 is connected to the upper end face of the drying oven 1. An external connecting pipe 306 is connected to the lower end face of the heat exchange box 302 at a position corresponding to the return pipe 305. A vertical plate 307 is fixedly installed on the inner wall of the box 302. Multiple heat-conducting fins 308 are linearly arrayed in the vertical plate 307. During the drying process, hot air containing moisture enters the heat exchange box 302 through the return pipe 305 and is discharged through the outer pipe 306. During this process, the residual heat of the hot and humid airflow is absorbed by the heat-conducting fins 308 and transferred to the other side of the vertical plate 307. At the same time, outside air is introduced into the heat exchange box 302 through the second fixed pipe 301. After the airflow absorbs the heat on the heat-conducting fins 308, it enters the circular box 212 through the connecting pipe 303 to regenerate the desiccant. The regenerated airflow is finally discharged through the air outlet pipe 304, completing the recycling of heat.

[0022] The working principle of this utility model is as follows: By pushing the sealing plate 102 to slide within the fixed frame 101, the PP polypropylene plastic to be dried is placed above the support plate 202. The fan 206 is turned on, allowing outside air to flow through the filter cotton 204 from the first fixed pipe 203 into the mounting pipe 205, and then through the connecting pipe and flow channel 213 into the circular box 212. The air then passes through the flow channel 213 from inside the circular box 212 into the air inlet pipe 207 for dehumidification by a desiccant. The heating device 208 is turned on to heat the air, causing the air flowing in the air inlet pipe 207 to be sprayed out from below the support plate 202 to dry the PP polypropylene plastic placed above the support plate 202. It should be noted that the air... When the flow channel 213 passes through the circular box 212, there are baffles and fixing nets at the positions corresponding to the flow channel 213 inside the circular box 212 (that is, the flow channel 213 is opened between the two baffles, and the fixing net can prevent the desiccant from falling off). This can prevent air from flowing into the circular box 212, being dehumidified by the desiccant, and then being sprayed out from the flow channel 213 at other positions. The air can only pass horizontally through the connecting pipe through the circular box 212 and then enter the air inlet pipe 207. By opening the rotary drive component 209, the transmission column 210 and the cross fixing frame 211 are driven to rotate. The cross fixing frame 211 can drive the circular box 212 to rotate, so that the circular box 212 continuously drives the desiccant inside to rotate and dehumidify. The heated air dries the PP polypropylene plastic. After drying, the humid air enters the heat exchange box 302 through the return pipe 305 and flows out through the external pipe 306. When flowing in the heat exchange box 302, it heats the heat-conducting fins 308, so that the temperature of the heat-conducting fins 308 is transferred to the other end of the vertical plate 307. By connecting the blower to the second fixed pipe 301, air force is input into the heat exchange box 302. The flowing air will carry the heat on the heat-conducting fins 308 through the flow groove 213 into the circular box 212 to dry the desiccant, and then discharge it out through the air outlet pipe 304.

[0023] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model 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 will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the embodiments of this utility model.

Claims

1. A dryer for producing PP polypropylene plastic, characterized in that, include: Drying oven (1); An air-inlet drying assembly (2) includes a partition (201) fixedly installed inside a drying chamber (1). A circular box (212) is rotatably arranged between the partition (201) and the drying chamber (1). A desiccant is placed inside the circular box (212). Circulation grooves (213) are arranged in a circular array on both sides of the circular box (212). An installation pipe (205) is fixedly installed between the drying chamber (1) and the circular box (212). A fan (206) is rotatably installed on the inner wall of the installation pipe (205). Dehumidification component (3) is used to return the dried hot air to the desiccant placed in the drying circulation channel (213).

2. The dryer for PP polypropylene plastic production according to claim 1, characterized in that, A fixed frame (101) is fixedly installed on one side of the drying box (1), and a sealing plate (102) is slidably installed on the inner wall of the fixed frame (101).

3. A dryer for PP polypropylene plastic production according to claim 2, characterized in that, A support plate (202) is fixedly installed between the partition (201) and the drying box (1). Multiple air outlet slots are linearly arrayed in the support plate (202). A first fixed pipe (203) is connected to one side of the drying box (1) at the position of the corresponding installation pipe (205). Filter cotton (204) is fixedly installed on the inner wall of the first fixed pipe (203).

4. A dryer for PP polypropylene plastic production according to claim 3, characterized in that, The mounting pipe (205) is connected to a connecting pipe on the side near the circular box (212). The connecting pipe is airtightly slidably connected to the outer surface of the circular box (212). An air inlet pipe (207) is embedded in the partition plate (201). The upper end of the air inlet pipe (207) is airtightly slidably connected to one side of the circular box (212). The lower end of the air inlet pipe (207) passes through the support plate (202) and extends to the bottom of the support plate (202). A heating device (208) is fixedly installed inside the air inlet pipe (207).

5. A dryer for PP polypropylene plastic production according to claim 4, characterized in that, A rotary drive (209) is fixedly installed on one side of the drying box (1). The output end of the rotary drive (209) passes through the partition (201) and is fixedly installed with a transmission column (210). A cross-shaped fixing frame (211) is fixedly installed at one end of the transmission column (210). The outer wall of the cross-shaped fixing frame (211) is fixedly connected to the circular box (212).

6. A dryer for PP polypropylene plastic production according to claim 5, characterized in that, A second fixing pipe (301) is embedded on one side of the drying oven (1). One end of the second fixing pipe (301) is connected to a heat exchange box (302). A connecting pipe (303) is connected to one side of the heat exchange box (302) at a position corresponding to the second fixing pipe (301). The connecting pipe (303) is airtightly slidably connected to one side of the circular box (212). An air outlet pipe (304) is embedded on one side of the partition (201). One end of the air outlet pipe (304) is connected to the circular box. (212) is airtightly slidingly connected on one side. The upper end face of the heat exchange box (302) is connected to a return pipe (305). One end of the return pipe (305) is connected to the upper end face of the drying oven (1). The lower end face of the heat exchange box (302) is connected to an external pipe (306) at the position corresponding to the return pipe (305). A vertical plate (307) is fixedly installed on the inner wall of the heat exchange box (302). Multiple heat-conducting fins (308) are linearly arrayed in the vertical plate (307).

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