Energy-saving heating furnace for melting and regenerating waste plastic

Abstract

The utility model provides an energy-saving heating furnace for melting and regenerating waste plastics, and relates to the technical field of heating furnaces. The energy-saving heating furnace for waste plastic melting regeneration comprises a furnace body, the lower end of the furnace body is connected with a heating hopper, the furnace body is of a double-layer structure and comprises an outer shell and an inner shell, a gas groove is formed between the outer shell and the inner shell, the lower end of the furnace body is connected with a gas box, and a gas burner is arranged in the gas box. According to the energy-saving heating furnace for melting and regenerating the waste plastics, the gas groove and the input pipe are arranged, when a gas burner is started to heat the heating hopper, overflowing heat of the gas burner enters the gas groove of the furnace body through the input pipe, so that the inner shell can be heated, the originally wasted heat is recycled for secondary utilization, and the energy-saving effect is achieved. Meanwhile, compared with the mode that heating is conducted only through a heating hopper, the additional heat supply mode that the air groove heats the inner shell of the furnace body can heat the interior of the furnace body from different angles, and more uniform distribution of the temperature is facilitated.

Description

Technical Field

[0001] This utility model relates to a waste plastic melting and heating furnace, specifically an energy-saving heating furnace for waste plastic melting and recycling, belonging to the field of heating furnace technology. Background Technology

[0002] With the widespread use of plastic products, the amount of waste plastic is increasing day by day. The recycling and reuse of waste plastic is of great significance for saving resources and protecting the environment. Melting waste plastic is a key step in the recycling process.

[0003] However, most traditional heating furnaces use a single heating method, such as resistance heating or gas heating. Resistance heating requires a heat conductor to transfer heat, which increases heat loss and has low efficiency. Although gas heating has a faster heating speed, it suffers from severe heat loss. Traditional heating furnaces cannot recover and utilize the overflowing heat, resulting in a large amount of energy waste and increased production costs.

[0004] To address these issues, we offer an energy-efficient heating furnace for melting and recycling waste plastics. Utility Model Content

[0005] To address the aforementioned problems, this utility model provides an energy-saving heating furnace for melting and recycling waste plastics. The specific technical solution is as follows:

[0006] An energy-saving heating furnace for melting and recycling waste plastics includes a furnace body with a heating bucket connected to the lower end of the furnace body. The furnace body has a double-layer structure, including an outer shell and an inner shell, with a gas groove between the outer shell and the inner shell. A gas box is connected to the lower end of the furnace body, and a gas burner is installed inside the gas box. An input pipe is connected to the outer end of the gas box, and an output pipe is connected to the outer end of the furnace body. An electromagnetic induction heating coil is installed inside the furnace body, and a heat insulation layer is installed inside the furnace body.

[0007] Preferably, the heating bucket is made of an alloy material with good thermal conductivity and high temperature resistance, and the gas burner is a high-efficiency burner nozzle located at the outer end of the heating bucket.

[0008] Preferably, the outer shell is made of a corrosion-resistant and high-strength alloy material, the inner shell is made of a high-temperature resistant ceramic material, and the insulation layer is located between the outer shell and the air trough, and it adopts a multi-layer composite structure, including ceramic fiber and aerogel.

[0009] Preferably, the input pipe is connected to the air trough at one end, the output pipe is connected to the air trough, and the electromagnetic induction heating coil is wrapped around the inner shell.

[0010] Preferably, the lower end of the heating hopper is connected to a discharge pipe, an electrically controlled valve is installed inside the discharge pipe, the lower end of the gas box is connected to a support column, and the upper end of the furnace body is provided with a furnace cover.

[0011] Preferably, a spiral stirring rod is rotatably connected inside the furnace cover, the lower end of the spiral stirring rod is located inside the discharge pipe, and a drive motor is connected to the upper end of the furnace cover, which is connected to the spiral stirring rod.

[0012] Preferably, the upper end of the furnace cover is connected to a feed pipe, the feed pipe is connected to an electrically controlled valve, the upper end of the feed pipe is connected to a crushing box, and the upper end of the furnace cover is connected to an exhaust pipe.

[0013] Preferably, the upper end of the output pipe is connected to the exhaust pipe, an electrically controlled valve is installed inside the exhaust pipe, the valve is located at the side end of the output pipe, and a pressure gauge and a temperature sensor are installed inside the furnace cover, with the lower ends of the pressure gauge and the temperature sensor both located inside the furnace body.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] 1. This energy-saving heating furnace for waste plastic melting and recycling is equipped with a gas trough and an input pipe. When the gas burner is started to heat the heating bucket, the overflowing heat will enter the gas trough of the furnace body through the input pipe, thereby heating the inner shell. This allows the previously wasted heat to be reused. By recovering the overflowing heat, the temperature inside the furnace body can be increased without increasing the additional energy input, which helps to reduce production costs. Especially in industrial scenarios of large-scale waste plastic processing, the energy-saving effect is more significant. At the same time, the heating of the inner shell of the furnace body by the gas trough, compared with heating only by the heating bucket, can heat the inside of the furnace body from different angles, which helps to achieve a more uniform temperature distribution.

[0016] 2. This energy-saving heating furnace for waste plastic melting and recycling has an electromagnetic induction heating coil installed in the inner shell. When AC power is introduced into it, eddy currents will be generated inside the waste plastic according to the principle of electromagnetic induction, causing the plastic to heat up. This heating method acts directly on the heated object and is highly efficient. Through the combination of electromagnetic induction and gas heating, the waste plastic can be quickly brought to the melting temperature, thus improving production efficiency.

[0017] 3. This energy-saving heating furnace for waste plastic melting and recycling is equipped with a crushing box, which can crush waste plastic into smaller particles to increase its heating surface area and thus improve heating efficiency. By being equipped with a spiral stirring rod, the waste plastic particles can be continuously tumbled through stirring, ensuring that the plastic in all parts is heated evenly, avoiding local overheating or incomplete melting. Uniform heating and good stirring make the waste plastic melt more thoroughly and evenly, resulting in higher quality recycled plastic products and reducing product defects caused by uneven heating. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0019] Figure 2 This is a schematic diagram of the furnace cover structure of this utility model;

[0020] Figure 3 This is a schematic diagram of the heating bucket structure of this utility model;

[0021] Figure 4 This is a cross-sectional structural diagram of the present invention;

[0022] Figure 5 For the present utility model Figure 4 Schematic diagram of area A.

[0023] Attached Figure Descriptions: 1. Furnace body; 2. Heating hopper; 3. Outer shell; 4. Inner shell; 5. Gas trough; 6. Gas tank; 7. Gas burner; 8. Input pipe; 9. Output pipe; 10. Electromagnetic induction heating coil; 11. Insulation layer; 12. Discharge pipe; 13. Support column; 14. Furnace cover; 15. Spiral stirring rod; 16. Feed pipe; 17. Crushing box; 18. Exhaust pipe; 19. Gas pressure gauge; 20. Temperature sensor. Detailed Implementation

[0024] The present invention will now be further described with reference to the accompanying drawings.

[0025] Please see Figure 1 — Figure 5 The furnace includes a furnace body 1, a heating bucket 2 connected to the lower end of the furnace body 1, a gas box 6 connected to the lower end of the furnace body 1, and a gas burner 7 installed inside the gas box 6. The heating bucket 2 is made of an alloy material with good thermal conductivity and high temperature resistance. The gas burner 7 uses a high-efficiency burner nozzle, which can make the gas burn completely, reduce energy waste and pollutant gas emissions. The gas burner 7 is located at the outer end of the heating bucket 2. When the gas burner 7 is started, it can generate a flame to heat the heating bucket 2. An input pipe 8 is connected to the outer end of the gas box 6, and an output pipe 9 is connected to the outer end of the furnace body 1.

[0026] The furnace body 1 adopts a double-layer structure, including an outer shell 3 and an inner shell 4. The outer shell 3 is made of corrosion-resistant and high-strength alloy material, which can ensure that the furnace body 1 is not easily corroded or damaged by external impacts. The inner shell 4 is made of high-temperature resistant ceramic material, which has good heat resistance and chemical stability and can withstand the high temperature and corrosion during the melting process of waste plastic. A gas groove 5 is provided between the outer shell 3 and the inner shell 4. The side end of the input pipe 8 is connected to the gas groove 5, and the output pipe 9 is connected to the gas groove 5. The heat overflowing from the gas burner 7 will enter the gas groove 5 through the input pipe 8, thereby heating the inner shell 4 for reuse, and finally being discharged from the gas groove 5 through the output pipe 9.

[0027] An electromagnetic induction heating coil 10 is installed inside the furnace body 1. The electromagnetic induction heating coil 10 is wrapped in the inner shell 4. When alternating current passes through, according to the principle of electromagnetic induction, eddy currents will be generated inside the waste plastic, causing the plastic to heat up and thus assisting the plastic to melt. An insulation layer 11 is installed inside the furnace body 1. The insulation layer 11 is located between the outer shell 3 and the air groove 5. It adopts a multi-layer composite structure, including ceramic fiber and aerogel. Ceramic fiber has good heat insulation performance, and aerogel has an extremely low thermal conductivity, which can further prevent heat conduction, thereby minimizing heat loss from the furnace body 1.

[0028] The lower end of the heating hopper 2 is connected to a discharge pipe 12, which is equipped with an electrically controlled valve. The molten plastic will be discharged from the discharge pipe 12. The lower end of the gas box 6 is connected to a support column 13, which is used to support the fixing device. The upper end of the furnace body 1 is equipped with a furnace cover 14, which is equipped with a pressure gauge 19 and a temperature sensor 20. The lower ends of the pressure gauge 19 and the temperature sensor 20 are both located inside the furnace body 1. The pressure gauge 19 is used to detect the pressure inside the furnace body 1 in real time, and the temperature sensor 20 is used to detect the temperature inside the furnace body 1. Based on the information fed back by the temperature sensor 20, the power of the electromagnetic induction heating coil 10 and the gas burner 7 can be adjusted to keep the temperature inside the furnace within the optimal temperature range required for melting waste plastic.

[0029] A spiral stirring rod 15 is rotatably connected inside the furnace cover 14. The lower end of the spiral stirring rod 15 is located inside the discharge pipe 12. A drive motor is connected to the upper end of the furnace cover 14. The drive motor is connected to the spiral stirring rod 15. Starting the drive motor will drive the spiral stirring rod 15 to rotate, thereby making the waste plastic particles tumble continuously through stirring, ensuring that the plastic in all parts can be heated evenly. A feed pipe 16 is connected to the upper end of the furnace cover 14. An electric control valve is connected inside the feed pipe 16. A crushing box 17 is connected to the upper end of the feed pipe 16. The crushing box 17 is used to crush the waste plastic into smaller particles to increase its heating area and thus improve heating efficiency.

[0030] The upper end of the furnace cover 14 is connected to the exhaust pipe 18, and the upper end of the output pipe 9 is connected to the exhaust pipe 18. The gas in the gas tank 5 will eventually enter the exhaust pipe 18. An electric control valve is installed in the exhaust pipe 18. The valve is located on the side of the output pipe 9. When the waste plastic is first heated, the electric control valves of the feed pipe 16 and the exhaust pipe 18 are closed to prevent heat from overflowing from the furnace body 1, thereby improving the heating efficiency. When the waste plastic is heated to a certain extent, in order to avoid excessive gas pressure in the furnace body 1, the exhaust pipe 18 needs to be opened to release the pressure.

[0031] The technical principles of this utility model have been described above with reference to specific embodiments. These descriptions are merely for explaining the principles of this utility model and should not be construed as limiting the scope of protection of this utility model in any way. Based on this explanation, those skilled in the art can readily conceive of other specific embodiments of this utility model without inventive effort, and these embodiments will all fall within the protection scope of the claims of this utility model.

Claims

1. An energy-saving heating furnace for melting and recycling waste plastics, comprising a furnace body (1), characterized in that: The furnace body (1) is connected to a heating bucket (2) at the lower end. The furnace body (1) adopts a double-layer structure, including an outer shell (3) and an inner shell (4). A gas groove (5) is provided between the outer shell (3) and the inner shell (4). The furnace body (1) is connected to a gas box (6) at the lower end. A gas burner (7) is provided inside the gas box (6). An input pipe (8) is connected to the outer end of the gas box (6). An output pipe (9) is connected to the outer end of the furnace body (1). An electromagnetic induction heating coil (10) is provided inside the furnace body (1). An insulation layer (11) is provided inside the furnace body (1).

2. The energy-saving heating furnace for melting and recycling waste plastics according to claim 1, characterized in that: The heating bucket (2) is made of alloy material with good thermal conductivity and high temperature resistance. The gas burner (7) adopts a high-efficiency burner nozzle and is located at the outer end of the heating bucket (2).

3. The energy-saving heating furnace for melting and recycling waste plastics according to claim 1, characterized in that: The outer shell (3) is made of corrosion-resistant and high-strength alloy material, the inner shell (4) is made of high-temperature resistant ceramic material, and the heat insulation layer (11) is located between the outer shell (3) and the air groove (5). It adopts a multi-layer composite structure, including ceramic fiber and aerogel.

4. The energy-saving heating furnace for melting and recycling waste plastics according to claim 1, characterized in that: The input tube (8) is connected to the air groove (5) at one end, the output tube (9) is connected to the air groove (5), and the electromagnetic induction heating coil (10) is wrapped in the inner shell (4).

5. The energy-saving heating furnace for melting and recycling waste plastics according to claim 1, characterized in that: The lower end of the heating bucket (2) is connected to a discharge pipe (12), and an electrically controlled valve is installed inside the discharge pipe (12). The lower end of the gas box (6) is connected to a support column (13), and the upper end of the furnace body (1) is provided with a furnace cover (14).

6. The energy-saving heating furnace for melting and recycling waste plastics according to claim 5, characterized in that: A spiral stirring rod (15) is rotatably connected inside the furnace cover (14). The lower end of the spiral stirring rod (15) is located inside the discharge pipe (12). A drive motor is connected to the upper end of the furnace cover (14), and the drive motor is connected to the spiral stirring rod (15).

7. The energy-saving heating furnace for melting and recycling waste plastics according to claim 5, characterized in that: The upper end of the furnace cover (14) is connected to a feed pipe (16), an electrically controlled valve is connected inside the feed pipe (16), a crushing box (17) is connected to the upper end of the feed pipe (16), and an exhaust pipe (18) is connected to the upper end of the furnace cover (14).

8. The energy-saving heating furnace for melting and recycling waste plastics according to claim 7, characterized in that: The upper end of the output pipe (9) is connected to the exhaust pipe (18). An electrically controlled valve is installed inside the exhaust pipe (18). The valve is located on the side of the output pipe (9). A pressure gauge (19) and a temperature sensor (20) are installed inside the furnace cover (14). The lower ends of the pressure gauge (19) and the temperature sensor (20) are both located inside the furnace body (1).

Images