Environment-friendly plastic particle granulator

Abstract

The utility model relates to the technical field of pelletizers, in particular to an environment-friendly plastic particle pelletizer. The device comprises a base used for supporting the device, an extrusion barrel is arranged at the top of the base, a material barrel is arranged at one end of the top of the extrusion barrel, a heat exchanger is arranged over the extrusion barrel, waste heat is transmitted to low-temperature gas in a pipeline through the pipe wall, the gas is heated and enters the material barrel through a second gas inlet pipe, and the waste heat is recycled. Raw materials passing through the charging barrel are preheated, the temperature of the raw materials rises, the energy utilization efficiency is improved, meanwhile, the temperature of waste gas is reduced, the waste gas is exhausted into an inner cavity of the purification box through an exhaust pipe, the waste gas firstly passes through a filter plate made of non-woven fabric, impurities such as large-particle dust in the waste gas are removed, and then the waste gas passes through an activated carbon layer. Pollutant molecules in the waste gas interact with the surface of the activated carbon, are adsorbed in pores of the activated carbon and are discharged through the exhaust port, so that the waste gas is purified and discharged, and the environment is protected.

Description

Technical Field

[0001] The utility model relates to the technical field of granulators, in particular to an environmentally friendly plastic particle granulator. Background Art

[0002] Plastic pelletizing machines usually use high-temperature melting, extrusion, and pelletizing processes. First, waste plastic or plastic raw materials are added to the pelletizer's hopper, and the plastic is heated to a molten state by a heating device. Then, the molten plastic is extruded into strips through a screw extruder. Finally, the strips are cut into plastic pellets of a certain size by a pelletizer.

[0003] Plastic will decompose at high temperature to produce small molecular compounds, gases, etc. These decomposition products will be discharged from the extruder barrel during the extrusion process to form waste gas. Opening a pipe on the extruder barrel to discharge waste gas is a common method of treating waste gas generated during the extrusion process. However, the waste gas discharged from the extruder barrel will carry heat, and direct discharge can easily cause energy waste. In addition, untreated waste gas contains pollutants such as smoke particles, which pollute the atmospheric environment, affect air quality, and have adverse effects on the surrounding ecological environment and residents' health. In view of this, we propose an environmentally friendly plastic particle granulator. Utility Model Content

[0004] The purpose of this utility model is to solve the above shortcomings and provide an environmentally friendly plastic particle granulator;

[0005] To achieve the above-mentioned object, the present invention provides an environmentally friendly plastic particle granulator, comprising a base for supporting the device, an extrusion barrel provided on the top of the base, and a material barrel provided at one end of the top of the extrusion barrel, a heat exchanger provided directly above the extrusion barrel, a first air inlet pipe fixedly connected between one end of the heat exchanger and the top of the extrusion barrel, and an exhaust pipe fixedly connected between the other end of the heat exchanger and the material barrel;

[0006] A purification box is provided in front of the heat exchanger, and a second air inlet pipe is fixedly connected to the purification box.

[0007] As a further improvement of the present technical solution, an air inlet chamber is provided inside the heat exchanger near one end connected to the first air inlet pipe, and an air outlet chamber is provided at the other end inside. A plurality of parallel pipes are fixedly connected between the air inlet chamber and the air outlet chamber, and through holes connected to the pipes are opened on the air inlet chamber and the air outlet chamber.

[0008] As a further improvement of this technical solution, a sealing cover is connected to the top of the purification box by a hinge, a filter plate is vertically slidably provided on one side of the purification box close to the second air inlet pipe, and an activated carbon layer is vertically slidably provided on the other side of the purification box.

[0009] As a further improvement of the present technical solution, a feed port is fixedly connected to the top of the barrel.

[0010] As a further improvement of the present technical solution, a screw is provided inside the extrusion barrel.

[0011] As a further improvement of the present technical solution, a placement platform is provided at the bottom of the heat exchanger, and the legs at the four ends of the bottom of the placement platform are placed on the top of the base for supporting the heat exchanger and the purification box.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] In this environmentally friendly plastic particle granulator, the waste gas discharged from the extruder enters the inner cavity of the heat exchanger through the first air inlet pipe and comes into contact with the pipe. The waste heat is transferred to the low-temperature gas in the pipe through the pipe wall, causing the gas to heat up and enter the barrel through the second air inlet pipe, preheating the raw materials passing through the barrel to increase its temperature, thereby improving energy utilization efficiency. At the same time, the waste gas temperature is reduced and discharged to the inner cavity of the purification box through the exhaust pipe. The waste gas first passes through a filter plate made of non-woven fabric to remove large particles of dust and other impurities in the waste gas, and then passes through the activated carbon layer, so that the pollutant molecules in the waste gas interact with the surface of the activated carbon and are adsorbed in the pores of the activated carbon and discharged through the exhaust port, thereby achieving waste gas purification and emission, which is beneficial to environmental protection. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0015] Figure 2 This is a schematic diagram of the exploded structure of the utility model;

[0016] Figure 3 It is a schematic diagram of the cross-sectional structure of the utility model;

[0017] Figure 4 This is a schematic diagram of the purification mechanism structure of the utility model;

[0018] Figure 5 This is a schematic diagram of the cross-sectional structure of the heat exchanger of the present invention.

[0019] The meaning of each number in the figure is:

[0020] 1. Base;

[0021] 2. Extruder; 21. Barrel; 22. Heat exchanger; 221. Air inlet chamber; 222. Air outlet chamber; 223. Pipe; 23. First air inlet pipe; 24. Exhaust pipe; 25. Purification box; 251. Filter plate; 252. Activated carbon layer; 26. Second air inlet pipe; 27. Sealing cover; 28. Feed port; 29. ​​Screw;

[0022] 3. Place the table. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0024] Plastic pelletizing machines typically use a high-temperature melting, extrusion, and pelletizing process. First, waste plastic or plastic raw materials are added to the pelletizer's hopper, where they are heated to a molten state by a heating device. The molten plastic is then extruded into strips through a screw extruder. Finally, the strips are cut into plastic pellets of a certain size by a pelletizer. Figure 1-Figure 5 As shown, this embodiment provides an environmentally friendly plastic particle granulator, including a base 1 for supporting the equipment, an extrusion barrel 2 is provided on the top of the base 1, and a material barrel 21 is provided at one end of the top of the extrusion barrel 2, a heat exchanger 22 is provided directly above the extrusion barrel 2, and a first air inlet pipe 23 is fixedly connected between one end of the heat exchanger 22 and the top of the extrusion barrel 2, and an exhaust pipe 24 is fixedly connected between the other end and the material barrel 21;

[0025] A purification box 25 is provided in front of the heat exchanger 22, and a second air inlet pipe 26 is fixedly connected to the purification box 25. The exhaust gas generated in the extruder 2 enters the heat exchanger 22 through the first air inlet pipe 23 to exchange heat with the low-temperature air, so that the temperature of the low-temperature gas increases and is discharged into the barrel 21 through the exhaust pipe 24. At the same time, the exhaust gas temperature decreases and enters the purification box 25 through the second air inlet pipe 26.

[0026] The improvement of this embodiment is that plastic will decompose at high temperature to produce small molecular compounds, gases, etc. These decomposition products will be discharged from the extrusion barrel 2 during the extrusion process to form waste gas. The waste gas enters the inner cavity of the heat exchanger 22 through the first air inlet pipe 23 and contacts the pipe 223. The waste heat is transferred to the low-temperature gas in the pipe 223 through the pipe wall, causing the gas to heat up and enter the barrel 21 through the second air inlet pipe 26, preheating the raw materials passing through the barrel 21 to increase its temperature and improve energy utilization efficiency. At the same time, the waste gas temperature is reduced and discharged to the inner cavity of the purification box 25 through the exhaust pipe 24. The waste gas first passes through the filter plate 251 made of non-woven fabric to remove large particles of dust and other impurities in the waste gas, and then passes through the activated carbon layer 252, so that the pollutant molecules in the waste gas interact with the surface of the activated carbon and are adsorbed in the pores of the activated carbon and discharged through the exhaust port, thereby achieving waste gas purification and emission, which is beneficial to environmental protection.

[0027] Considering that the heat exchanger 22 needs to exchange heat between the two gases, Figure 2 and Figure 3 As shown, an air inlet chamber 221 is provided inside the heat exchanger 22 near one end connected to the first air inlet pipe 23, and an air outlet chamber 222 is provided at the other end. A plurality of parallel pipes 223 are fixedly connected between the air inlet chamber 221 and the air outlet chamber 222. Through holes connected to the pipes 223 are provided on the air inlet chamber 221 and the air outlet chamber 222. Low-temperature air is injected into the air inlet chamber 221 through the inlet, and the air enters the pipe 223. At the same time, the high-temperature exhaust gas discharged from the extruder 2 enters the inner cavity of the heat exchanger 22 through the first air inlet pipe 23, and the heat is transferred to the low-temperature gas in the pipe through the pipe 223, so that the gas temperature is increased, and then discharged to the air outlet chamber 222, realizing heat transfer, which is beneficial to utilizing the waste heat of the exhaust gas and saving energy.

[0028] In order to facilitate the purification of exhaust gas, Figure 3 and Figure 4 As shown, the top of the purification box 25 is connected to a sealing cover 27 by a hinge, and a filter plate 251 is vertically slidably provided on one side of the purification box 25 close to the second air inlet pipe 26, and an activated carbon layer 252 is vertically slidably provided on the other side of the purification box 25. The low-temperature exhaust gas after heat exchange in the inner cavity of the heat exchanger 22 is discharged to the inner cavity of the purification box 25 through the exhaust pipe 24. The exhaust gas first passes through the filter plate 251 made of non-woven fabric to remove large particles of dust and other impurities in the exhaust gas, and then passes through the activated carbon layer 252, so that the pollutant molecules in the exhaust gas interact with the surface of the activated carbon, are adsorbed in the pores of the activated carbon, and are discharged through the exhaust port, thereby achieving exhaust gas purification and emission, which is beneficial to environmental protection.

[0029] In order to facilitate the addition of materials, such as Figure 1-Figure 3 As shown, a feed port 28 is fixedly connected to the top of the barrel 21, and the barrel 21 is funnel-shaped for easy pouring of materials.

[0030] Since the existing granulator extrusion mechanism transports the plastic melt, Figure 3 As shown, a screw 29 is provided inside the extrusion barrel 2, and the raw material is poured into the feed port 28. The raw material is preheated when passing through the barrel 21, and then falls into the extrusion barrel 2 at the bottom. The barrel is heated to the melting temperature of the plastic by the heating mechanism in the barrel, so that the plastic particles or powder are gradually softened and melted in the barrel to form a uniform melt. Then, the motor is started to drive the screw 29 to rotate. The plastic melt is transported to the discharge port at the other end through the rotation and propulsion of the screw 29, and is extruded and granulated under the action of the extrusion pressure to form the required plastic products, which is convenient for conveying materials.

[0031] When the environmentally friendly plastic particle granulator of the present invention is used, plastic will decompose at high temperature to produce small molecular compounds, gases, etc. These decomposition products will be discharged from the extrusion barrel 2 during the extrusion process to form waste gas. The waste gas enters the inner cavity of the heat exchanger 22 through the first air inlet pipe 23 and contacts the pipe 223. The waste gas transfers the residual heat to the low-temperature gas in the pipe 223 through the pipe wall, causing the gas to heat up and enter the barrel 21 through the second air inlet pipe 26. The raw material is poured into the feed port 28, preheated by the high-temperature gas when passing through the barrel 21, and then falls into the extrusion barrel 2 at the bottom. The barrel is heated to the melting temperature of the plastic by the heating mechanism in the barrel, so that the plastic particles or powder are gradually softened and melted in the barrel to form a uniform melt. The motor is started to drive the screw 29 to rotate, and the plastic is melted by the rotation and propulsion of the screw 29. The molten material is transported to the discharge port away from one end of the barrel 21, and is extruded and pelletized under the action of extrusion pressure to form the required plastic products. During the heat exchange process, the exhaust gas temperature is reduced and discharged to the inner cavity of the purification box 25 through the exhaust pipe 24. The exhaust gas first passes through the filter plate 251 made of non-woven fabric to remove large particles of dust and other impurities in the exhaust gas, and then passes through the activated carbon layer 252, so that the pollutant molecules in the exhaust gas interact with the surface of the activated carbon and are adsorbed in the pores of the activated carbon and discharged through the exhaust port, thereby achieving exhaust gas purification and emission, which is beneficial to protecting the environment. When the filter plate 251 and the activated carbon layer 252 need to be cleaned, the sealing cover 27 is opened, and then the filter plate 251 and the activated carbon layer 252 are respectively pulled out from the purification box 25 for replacement or cleaning. The installation and disassembly are convenient, which is beneficial to saving maintenance time and improving work efficiency.

[0032] The above shows and describes the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely preferred examples of the present invention and are not intended to limit the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention, and such changes and improvements fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. An environmentally friendly plastic particle granulator, comprising a base (1) for supporting the device, characterized in that: An extrusion barrel (2) is provided on the top of the base (1), and a material barrel (21) is provided at one end of the top of the extrusion barrel (2). A heat exchanger (22) is provided directly above the extrusion barrel (2). A first air inlet pipe (23) is fixedly connected between one end of the heat exchanger (22) and the top of the extrusion barrel (2), and an exhaust pipe (24) is fixedly connected between the other end of the heat exchanger (22) and the material barrel (21); A purification box (25) is provided in front of the heat exchanger (22), and a second air inlet pipe (26) is fixedly connected to the purification box (25). The waste gas generated in the extruder barrel (2) enters the heat exchanger (22) through the first air inlet pipe (23) and exchanges heat with the low-temperature air, thereby increasing the temperature of the low-temperature gas and discharging it into the barrel (21) through the exhaust pipe (24). At the same time, the waste gas temperature is reduced and enters the purification box (25) through the second air inlet pipe (26).

2. The environmentally friendly plastic particle granulator according to claim 1, characterized in that: An air inlet chamber (221) is provided inside the heat exchanger (22) at one end close to the end connected to the first air inlet pipe (23), and an air outlet chamber (222) is provided at the other end. A plurality of parallel pipes (223) are fixedly connected between the air inlet chamber (221) and the air outlet chamber (222). Through holes communicating with the pipes (223) are provided on the air inlet chamber (221) and the air outlet chamber (222).

3. The environmentally friendly plastic particle granulator according to claim 1, characterized in that: The top of the purification box (25) is connected to a sealing cover (27) via a hinge, a filter plate (251) is vertically slidably provided on one side of the purification box (25) close to the second air inlet pipe (26), and an activated carbon layer (252) is vertically slidably provided on the other side of the purification box (25).

4. The environmentally friendly plastic particle granulator according to claim 1, characterized in that: The top of the barrel (21) is fixedly connected with a feed port (28).

5. The environmentally friendly plastic particle granulator according to claim 1, characterized in that: A screw (29) is provided inside the extrusion barrel (2).

6. The environmentally friendly plastic particle granulator according to claim 1, characterized in that: A placement platform (3) is provided at the bottom of the heat exchanger (22), and legs at four ends of the bottom of the placement platform (3) are placed on the top of the base (1) for supporting the heat exchanger (22) and the purification box (25).

Images