A heat energy recovery device based on a cable material granulating apparatus

Abstract

The utility model relates to cable pelletizing equipment technical field, concretely disclose a kind of heat recovery device based on cable material pelletizing equipment, including heat recovery plate, heat recovery plate is used to insert into the storage tank needing heat exchange, the hollow inside of heat recovery plate is equipped with heat exchange runner, heat exchange runner is S shape or spiral shape in heat recovery plate, heat exchange runner is filled with liquid heat conducting medium in the periphery of heat exchange runner in heat recovery plate, heat exchange runner one end is communicated with the cooling pipeline output end of cable pelletizing equipment, heat exchange runner other end is used to be communicated with the input end of the circulating pump for cooling of cable pelletizing equipment.The present application is to solve the problem of the existing pelletizing equipment heat energy waste and the existing heat energy utilization again exists the problem of the recovered heat energy and the heated substance between heating uniformity.

Description

Technical Field

[0001] This utility model relates to the technical field of cable granulation equipment, and specifically to a heat recovery device based on cable material granulation equipment. Background Technology

[0002] PVC cable material is used to process cables, and its quality determines the quality of the cable insulation. In the process of making PVC cable material, plasticizing and granulating is a very important step. In the existing technology, twin / single screw granulators are usually used for granulation. During this process, the temperature of the screw in the granulator will continue to rise. In order to cool the screw, the granulator body is equipped with a water tank and a cooling channel inside the machine. The water tank and the cooling channel are connected, and the water in the water tank is used to cool the outer surface of the screw barrel. This cooling is achieved by the cooling water circulating internally under the action of a circulating pump. However, during the cooling process, the surface temperature of the screw barrel can reach 130-180℃, and the temperature of the circulating water after each flow through the screw barrel surface is as high as 70-90℃. In order to make the cooling water usable again for cooling the granulation equipment, it is necessary to use an additional external circulating water cooling structure to cool the internal circulating cooling water of the granulator to a set temperature (such as close to room temperature) before sending it back by the circulating pump for reuse in cooling the equipment. In this way, although the cooling of the granulation equipment is guaranteed, an external circulating water cooling structure has to be added for heat exchange to meet the cooling of the internal circulation of the granulation equipment. The heat energy exchanged by the external circulating water cooling structure is not utilized.

[0003] The raw materials for PVC cable granulation contain a large amount of plasticizer. Especially in winter, the viscosity of plasticizer is very high, and some types will even solidify. It is necessary to heat the plasticizer to reduce its viscosity, which requires the establishment of a heating system. Establishing a separate heating system will increase costs.

[0004] The prior art includes a patent publication number CN207059184U entitled "A Heating System for PVC Cable Material Auxiliaries," which discloses adding a stainless steel pipe to allow the heat energy of the internally circulating cooling water to enter the stainless steel pipe. This allows the stainless steel pipe, which is set inside the storage tank, to exchange heat with the substances inside the storage tank (such as epoxidized soybean oil or chlorinated paraffin, which can be used as plasticizers). This not only achieves heat reuse but also saves the cost of adding an external circulating water cooling structure. However, the stainless steel pipe is bent and set inside the storage tank, so only the part of the stainless steel pipe in contact with the material has good heat exchange, while the heat exchange in the rest is poor, resulting in poor heat exchange uniformity. Utility Model Content

[0005] The present invention aims to provide a heat recovery device based on cable material granulation equipment, so as to solve the problems of heat energy waste in existing granulation equipment and poor heating uniformity between the recovered heat energy and the heated material in existing heat energy utilization.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: A heat recovery device based on cable material granulation equipment includes a heat recovery plate, which is inserted into a storage tank that requires heat exchange. The hollow interior of the heat recovery plate has heat exchange channels that are S-shaped or spiral-shaped. The heat recovery plate is filled with liquid heat-conducting medium around the heat exchange channels. One end of the heat exchange channels is connected to the output end of the cooling pipe of the cable granulation equipment, and the other end of the heat exchange channels is connected to the input end of the cooling circulation pump of the cable granulation equipment.

[0007] The principle and advantages of this scheme are as follows: This scheme utilizes a heat recovery plate that can be inserted into the storage tank, making the use of the heat recovery plate more flexible. This scheme uses the heat recovery plate to heat the material in the storage tank that requires heat exchange (heating) during the granulation process. This achieves both cooling of the heat generated in the granulation equipment, reducing reliance on external circulating water cooling structures, and transferring the heat generated in the granulation equipment to the heating of the material in the storage tank under the action of the circulating pump, thus realizing the recovery and utilization of heat energy.

[0008] In addition, the heat transfer oil filling the heat exchange tubes of the heat recovery plate has good thermal conductivity and fluidity, which can make the plate surface temperature evenly distributed, and help to make the material in the storage tank more evenly heated.

[0009] Preferably, as an improvement, the heat exchange channel is a metal pipe, specifically a stainless steel pipe.

[0010] Preferably, as an improvement, the heat recovery plate is provided with an inlet for adding heat-conducting medium to facilitate the addition of heat-conducting medium.

[0011] Preferably, as an improvement, the thermally conductive medium is thermally conductive silicone oil.

[0012] Preferably, as an improvement, there is more than one heat recovery plate, and all heat recovery plates can be inserted into the storage tank. The heat exchange channels of the heat recovery plates are connected in series through pipes. The heat exchange channels on the first and last heat recovery plates are respectively connected to the circulating pump and the cooling pipe. By using multiple heat recovery plates, the heat exchange channels can be further extended, which not only helps to improve the heat recovery and utilization rate, but also helps to allow more material in the storage tank to directly contact the heat recovery plates, thus helping to improve the uniformity of the material in the storage tank.

[0013] Preferably, as an improvement, it also includes a heater disposed between the heat recovery plate and the output end of the cooling pipe of the cable granulation equipment. The heater includes a flow cavity and a heating coil surrounding the surface of the flow cavity. One end of the flow cavity is connected to the output end of the cooling pipe, and the other end is connected to the input end of the heat exchange channel. The heat recovery plate is equipped with a temperature sensor to facilitate the control of the heater to provide auxiliary heating when the material in the storage tank cannot reach the required temperature. This avoids the cost of directly installing a heating system in the storage tank and makes the heater simpler and more convenient to maintain as it is located outside the storage tank.

[0014] Preferably, as an improvement, the temperature sensor is connected to the control system, which controls the heating coil to heat up when the temperature sensed by the temperature sensor is lower than a set value.

[0015] Preferably, as an improvement, the temperature sensor is a thermocouple mounted on the heat recovery plate.

[0016] Preferably, as an improvement, the flow cavity of the heater is a cylindrical cavity. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of a heat recovery plate inserted into a storage tank according to Embodiment 1 of the present invention.

[0018] Figure 2 for Figure 1 A schematic diagram showing the connection relationship between the circulating pump and cooling pipeline of the cable granulation equipment in the front sectional view.

[0019] Figure 3 for Figure 2 The diagram only shows the connection between the heat recovery plate and the heater.

[0020] Figure 4 This is a cross-sectional schematic diagram of the heat recovery plate according to Embodiment 1 of this utility model.

[0021] Figure 5 for Figure 3 An exploded view of the heater, showing that the inner liner of the heater is wrapped with heating coils, and the inner cavity of the liner forms a flow chamber.

[0022] Figure 6 This is a three-dimensional structural diagram of three heat recovery plates connected in series inserted into a storage tank, according to Embodiment 2 of this utility model. The reference numerals in the accompanying drawings include: heat recovery plate 1, heat exchange channel 11, inlet 111, outlet 112, heat transfer medium 12, adding port 13, heater 2, flow chamber 21, heating coil 22, circulation pump 3, cooling pipe 4, and storage tank 10. Detailed Implementation

[0023] The following detailed description illustrates the specific implementation method: Example 1 Combination Figures 1 to 5 A heat recovery device based on a cable material granulation equipment includes a heat recovery plate 1 and a heater 2. The heat recovery plate 1 is inserted into a storage tank 10 that requires heat exchange.

[0024] The heat recovery plate 1 has a hollow interior and is equipped with heat exchange channels 11 arranged in an S-shape or spiral shape. The heat exchange channels 11 are made of metal pipes, and stainless steel pipes are used as an example in this embodiment.

[0025] The heat exchange channel 11 is filled with liquid heat transfer medium 12. An inlet 13 is provided on the heat recovery plate 1 for adding the heat transfer medium 12, facilitating its replenishment. The heat transfer medium 12 is selected as thermally conductive silicone oil. The thermally conductive oil filling the heat exchange channel 11 within the heat recovery plate 1 has excellent thermal conductivity and fluidity, ensuring uniform temperature distribution on the plate surface, thereby resulting in more uniform heating of the material within the storage tank 10.

[0026] The heater 2 is cylindrical and includes a flow cavity 21 and a heating coil 22 surrounding the surface of the flow cavity 21. The flow cavity 21 is a cylindrical cavity. The input end of the flow cavity 21 is connected to the output end of the cooling pipe 4 of the cable granulation equipment, and the output end of the flow cavity 21 is connected to the input end (i.e., the inlet 111) of the heat exchange channel 11. The output end (i.e., the outlet 112) of the heat exchange channel 11 on the heat recovery plate 1 is connected to the input end of the cooling circulation pump 3 of the cable granulation equipment. In this embodiment, the circulation pump 3 is a water pump.

[0027] A temperature sensor is installed on the heat recovery plate 1. In this embodiment, the temperature sensor is a thermocouple mounted on the heat recovery plate 1. The temperature sensor is connected to the control system. When the temperature sensor detects that the temperature is lower than the set value, the control system controls the heating coil 22 to heat the material. When the material temperature inside the storage tank 10 does not meet the requirements, the heater 2 can be controlled to provide auxiliary heating. This design avoids the cost of directly installing a heating system inside the storage tank 10 and places the heater 2 outside the storage tank 10 for easy maintenance.

[0028] This embodiment improves the flexibility of use by inserting the heat recovery plate 1 into the storage tank 10. This embodiment utilizes the heat energy generated during the granulation process to heat the material in the storage tank 10 through the heat recovery plate 1, which not only cools the granulation equipment and reduces the reliance on the external circulating water cooling structure, but also transfers the heat energy generated by the granulation equipment to the material in the storage tank 10 under the action of the circulating pump 3, thus realizing the recovery and utilization of heat energy.

[0029] Example 2 Combination Figure 6The difference between Embodiment 2 and Embodiment 1 is that the number of heat recovery plates 1 can be multiple independent pieces, all of which can be inserted into the storage tank 10. The heat exchange channels 11 of each heat recovery plate 1 are connected in series through pipes, and the heat exchange channels 11 of the heat recovery plates 1 at both ends are connected to the circulating pump 3 and the heater 2, respectively.

[0030] Specifically, the outlet of the heat exchange channel 11 near the heat recovery plate 1 of the circulating pump 3 is connected to the input end of the circulating pump 3 used for cooling the cable granulation equipment; the inlet of the heat exchange channel 11 near the heater 2 is connected to the outlet end of the heater 2, and the inlet end of the heater 2 is connected to the output end of the cooling pipe 4 of the cable granulation equipment. By using multiple heat recovery plates 1, the heat exchange channel 11 can be extended, improving the heat recovery and utilization rate, while allowing more materials in the storage tank 10 to directly contact the heat recovery plate 1, thus improving the uniformity of material heating.

[0031] The above descriptions are merely embodiments of this utility model. Commonly known technical solutions and / or characteristics are not described in detail here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the technical solution of this utility model. These modifications and improvements should also be considered within the scope of protection of this utility model, and will not affect the effectiveness of the implementation of this utility model or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A heat recovery device based on cable material granulation equipment, characterized in that: It includes a heat recovery plate, which is inserted into the storage tank that needs heat exchange. The hollow interior of the heat recovery plate has heat exchange channels, which are S-shaped or spiral-shaped inside the heat recovery plate. The heat exchange channels are filled with liquid heat-conducting medium around them. One end of the heat exchange channels is connected to the output end of the cooling pipe of the cable granulation equipment, and the other end of the heat exchange channels is connected to the input end of the cooling circulation pump of the cable granulation equipment.

2. The heat recovery device based on cable material granulation equipment according to claim 1, characterized in that: The heat exchange channel is a metal pipe.

3. The heat recovery device based on cable material granulation equipment according to claim 1, characterized in that: The heat recovery plate has an inlet for adding heat-conducting medium.

4. The heat recovery device based on cable material granulation equipment according to claim 1, characterized in that: The thermally conductive medium is thermally conductive silicone oil.

5. The heat recovery device based on cable material granulation equipment according to claim 1, characterized in that: The heat recovery plates are not limited to one piece, and all heat recovery plates can be inserted into the storage tank. The heat exchange channels of the heat recovery plates are connected in series through pipes, and the heat exchange channels on the first and last heat recovery plates are respectively connected to the circulating pump and the cooling pipeline.

6. The heat recovery device based on cable material granulation equipment according to any one of claims 1-5, characterized in that: It also includes a heater installed between the heat recovery plate and the output end of the cooling pipe of the cable granulation equipment. The heater includes a flow cavity and a heating coil surrounding the surface of the flow cavity. One end of the flow cavity is connected to the output end of the cooling pipe, and the other end is connected to the input end of the heat exchange channel. A temperature sensor is provided on the heat recovery plate.

7. The heat recovery device based on cable material granulation equipment according to claim 6, characterized in that: The temperature sensor is connected to the control system, which controls the heating coil to heat up when the temperature sensed by the temperature sensor is lower than the set value.

8. The heat recovery device based on cable material granulation equipment according to claim 6, characterized in that: The temperature sensor is a thermocouple mounted on the heat recovery plate.

9. The heat recovery device based on cable material granulation equipment according to claim 6, characterized in that: The flow chamber of the heater is a cylindrical cavity.

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