Extruder waste heat recovery device

Abstract

This application provides a waste heat recovery device for an extruder, including a preheating hopper installed at the extruder inlet and multiple blowers installed in and enclosing the temperature control zones of the extruder. Each blower outlet is equipped with a collection hood, and the outlets of these hoods are all connected to the same hot air pipe. The outlet of the hot air pipe is connected to the interior of the preheating hopper. This solution can efficiently recover and utilize waste heat generated during the extrusion process, improving energy efficiency and reducing production costs.

Description

Technical Field

[0001] This application relates to the field of waste heat recovery technology, and in particular to a waste heat recovery device for an extruder. Background Technology

[0002] Extruders are commonly used equipment in plastics processing. Traditional extruders generate a large amount of waste heat during operation, which is usually directly released into the environment, resulting in energy waste and environmental impact. Therefore, developing a device that can effectively recover and utilize extruder waste heat is of significant practical importance in order to improve energy efficiency and reduce production costs. Utility Model Content

[0003] To address the shortcomings of the prior art, this application provides an extruder waste heat recovery device that can efficiently recover and utilize waste heat generated during the extrusion process, thereby improving energy efficiency and reducing production costs.

[0004] To achieve the above objectives, the present invention employs the following technology: An extruder waste heat recovery device includes a preheating hopper installed at the extruder inlet and multiple blowers installed in and enclosing the temperature control zones of the extruder. Each blower outlet is equipped with a collection hood, and the outlets of the collection hoods are all connected to the same hot air pipe. The output end of the hot air pipe is connected to the interior of the preheating hopper. A temperature sensor is installed inside the preheating hopper. An exhaust pipe is branched at the output end of the hot air pipe, and an exhaust valve is installed on the exhaust pipe.

[0005] The beneficial effects of this invention are: it can efficiently recover the waste heat generated during the extrusion process and use it to preheat the material entering the extruder, thereby improving energy utilization efficiency and reducing production costs. Attached Figure Description

[0006] The accompanying drawings described herein are merely illustrative of selected embodiments, not all possible implementations, and are not intended to limit the scope of this invention.

[0007] Figure 1 This is a schematic diagram of the overall structure of an embodiment of this application. Detailed Implementation

[0008] To make the objectives, technical solutions and advantages of the present utility model clearer, the implementation methods of the present utility model will be described in detail below with reference to the accompanying drawings. However, the embodiments described in the present utility model are only some embodiments of the present utility model, and not all embodiments.

[0009] This application provides an extruder waste heat recovery device, including a preheating hopper 1 installed at the extruder inlet and multiple blowers 2 installed in each temperature control zone of the extruder and enclosing the temperature control zones. Each blower 2 outlet is equipped with a collection cover 3, and the outlets of the collection covers 3 are all connected to the same hot air pipe 4. The output end of the hot air pipe 4 is connected to the interior of the preheating hopper 1.

[0010] Among them, blower 2 is used to draw ambient air to cool the overheated area of ​​the extruder, collection hood 3 is used to collect the hot air heated by the extruder at the outlet of blower 2, and hot air pipe 4 is used to collect the hot air collected by each collection hood 3 and transport it to the preheating hopper 1. The preheating hopper 1 is used to preheat the material of the extruder.

[0011] Specifically, a heat dissipation pipe 11 is laid inside the preheating hopper 1. The heat dissipation pipe 11 can be set as a serpentine pipe. The input end of the heat dissipation pipe 11 is connected to the output end of the hot air pipe 4, and the output end of the heat dissipation pipe 11 extends out of the preheating hopper 1.

[0012] Specifically, each collection hood 3 is equipped with a valve 31 at the connection between it and the hot air pipe 4. The valve 31 is an automatic valve.

[0013] Specifically, a temperature sensor 5 is installed inside the preheating hopper 1. The temperature sensor 5 is used to monitor the temperature of the material inside the preheating hopper 1 in real time so as to monitor the preheating status of the material in real time.

[0014] Specifically, the output section of the hot air pipe 4 branches into an exhaust pipe 41, and an exhaust valve is installed on the exhaust pipe 41. When the temperature sensor 5 detects that the preheating temperature in the preheating hopper 1 is too high, the exhaust valve can be opened to remove excess hot air through the exhaust pipe 41.

[0015] Specifically, temperature sensor 5 is connected to a controller. The controller is used to receive the signal from temperature sensor 5 and adjust the opening and closing state of the exhaust valve. The controller can be a temperature controller.

[0016] The working process of the extruder waste heat recovery device includes: Initialization: Set the maximum preheating temperature of the material on the controller as needed.

[0017] Start-up: Turn on the extruder, set the extruder temperature, and the blower 2 will automatically start if the temperature exceeds the set temperature, and the valve 31 at the connection between the blower 2 and the hot air pipe 4 will open simultaneously; when the blower 2 is turned off, the valve 31 will also close simultaneously.

[0018] Preheating: Hot air is collected in the hot air pipe 4 and transported to the heat dissipation pipe 11 through the hot air pipe 4 to preheat the material in the preheating hopper 1.

[0019] Temperature control: Temperature sensor 5 monitors the preheating temperature of the material in the preheating hopper 1 in real time. The controller automatically adjusts the opening and closing status of the exhaust valve according to the temperature signal. When the material temperature exceeds the set value, the exhaust valve opens; when the material temperature is lower than the set value, the exhaust valve closes. After the exhaust valve opens, part of the hot air delivered from the hot air pipe 4 enters the heat dissipation pipe 11, and the other part is discharged through the exhaust pipe 41, ensuring that the preheating temperature in the preheating hopper 1 does not exceed the set value.

[0020] In application, the above description is only a preferred embodiment of this application and is not intended to limit this application. Obviously, those skilled in the art can make various modifications and variations to this application without departing from the spirit and scope of this application.

Claims

1. A waste heat recovery device for an extruder, characterized in that, It includes a preheating hopper (1) installed at the feed inlet of the extruder and multiple blowers (2) installed in each temperature control zone of the extruder and enclosing the temperature control zone. Each blower (2) outlet is equipped with a collection cover (3), and the outlets of the collection covers (3) are all connected to the same hot air pipe (4). The output end of the hot air pipe (4) is connected to the inside of the preheating hopper (1). A temperature sensor (5) is installed inside the preheating hopper (1). The output end of the hot air pipe (4) branches to form an exhaust pipe (41), and an exhaust valve is installed on the exhaust pipe (41).

2. The extruder waste heat recovery device according to claim 1, characterized in that, The preheating hopper (1) is equipped with a heat dissipation pipe (11), and the input end of the heat dissipation pipe (11) is connected to the output end of the hot air pipe (4).

3. The extruder waste heat recovery device according to claim 1, characterized in that, A valve (31) is installed at the connection between the collection hood (3) and the hot air pipe (4). The valve (31) is an automatic valve.

4. The extruder waste heat recovery device according to claim 1, characterized in that, The temperature sensor (5) is connected to a controller, which receives the signal from the temperature sensor (5) and controls the opening and closing of the exhaust valve.

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