Polypropylene powder drying apparatus

Abstract

The utility model relates to a kind of polypropylene powder drying equipment, including tank, pedestal and double drying mechanism, the tank top is equipped with feeding frame, pour polypropylene powder into tank, and start heating pipe fitting to heat heat conducting oil in storage barrel, heat in storage barrel is transferred to tank bottom by heat conducting disc, start pump body, the pump body is high-temperature resistant pump, hot oil is sent into delivery pipe, into heat transfer pipe, and heat transfer pipe is helical on the surface of tank, can heat treatment to tank side, and tank surface is equipped with with helical installation heat conducting ring, and the area of heat transfer pipe is larger, set up shroud outside tank, can play heat preservation effect, reduce the loss of heat, heat conducting oil enters storage barrel by liquid discharge pipe, set up agitator in tank, can polypropylene powder stirring treatment, can take out a part of polypropylene powder to observe, after drying is completed, then stop drying, not dry is completed then continue drying treatment.

Description

Technical Field

[0001] This utility model relates to the technical field of polypropylene powder processing equipment, specifically a polypropylene powder drying equipment. Background Technology

[0002] Polypropylene powder typically contains a certain amount of volatiles during the production process. The presence of these volatiles can affect the performance of polypropylene products. Traditional polypropylene powder drying equipment uses a single heating method for drying, resulting in poor drying effect on polypropylene powder.

[0003] For example, the authorized patent document with application number CN201922450055.3 discloses a polypropylene powder drying device. In the above structure, a single heating source is used for drying polypropylene powder, which has the aforementioned problem of poor drying effect on polypropylene powder and lack of multi-source heating for auxiliary drying. Therefore, we need to provide a polypropylene powder drying device. Utility Model Content

[0004] The purpose of this invention is to provide a polypropylene powder drying device, which has a dual drying mechanism on the surface of the tank. It can heat the bottom and sides of the tank with a single heat source to dry the polypropylene powder inside the tank. It solves the problems mentioned in the background art by using a single heat source to heat the bottom and sides of the tank simultaneously.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a polypropylene powder drying device, comprising:

[0006] The tank consists of a tank body, a base, and a dual drying mechanism. The top of the tank body is equipped with a feeding frame, and the bottom is connected to a discharge valve pipe. The tank body is fixed to the top of the base. The surface of the tank body is equipped with a dual drying mechanism for simultaneous heating of the bottom and sides of the tank body to increase the heating range.

[0007] The dual drying mechanism includes a storage tank, heating pipes, and heat transfer components. The storage tank is fixed to the bottom of the tank and is used to store heat transfer oil and heat the bottom of the tank. Heating pipes are installed inside the storage tank, and the heat transfer components are installed on the surface of the tank and are used to heat the sides of the tank.

[0008] Preferably, the heat transfer component includes a pump body, a delivery pipe, a heat transfer tube, and a drain pipe. The heat transfer tube is spiral-shaped and installed on the surface of the tank. The inlet end of the heat transfer tube is connected to the storage tank via a delivery pipe. The pump body is connected inside the delivery pipe. The drain end of the heat transfer tube is connected to the storage tank via a drain pipe.

[0009] Preferably, a heat-conducting ring is fixedly installed on the surface of the tank, and a spiral groove for fitting with the heat transfer tube is formed on the outer surface of the heat-conducting ring.

[0010] Preferably, a protective cover is fitted over the surface of the heat transfer tube, the protective cover is fixed to the surface of the tank, and the protective cover is configured as a heat insulation cover.

[0011] Preferably, a heat-conducting plate is embedded in the top of the storage tank, the top of the heat-conducting plate is in contact with the bottom of the tank, and a liquid replenishment pipe is provided on the surface of the storage tank.

[0012] Preferably, two partitions are fixedly installed inside the storage tank, with the ends of the two partitions fixed to the front and back of the inner wall of the storage tank, respectively, forming an S-shaped channel to extend the path of the drain pipe for discharging oil.

[0013] Preferably, a stirrer is installed inside the tank for stirring the polypropylene powder inside the tank.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] This invention features a dual drying mechanism on the surface of the tank, which can heat the bottom and sides of the tank with a single heat source to dry the polypropylene powder inside the tank. By using a single heat source to heat the bottom and sides of the tank simultaneously, the energy loss of traditional multi-heat source systems is avoided. Through the circulation of heat transfer oil between the storage tank and the spiral heat transfer tube, the heat is fully distributed to all parts of the tank. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural schematic diagram of the present invention;

[0017] Figure 2 This is a perspective view of the dual drying mechanism of this utility model;

[0018] Figure 3 This is a perspective view of the heat transfer component of this utility model;

[0019] Figure 4 This is a perspective sectional view of the storage tank of this utility model;

[0020] Figure 5 This is a three-dimensional sectional view of the tank body of this utility model.

[0021] In the diagram: 1. Tank body; 2. Base; 3. Dual drying mechanism; 31. Storage tank; 32. Heating pipe; 33. Heat transfer component; 331. Pump body; 332. Delivery pipe; 333. Heat transfer pipe; 334. Drain pipe; 4. Heat-conducting ring; 5. Spiral groove; 6. Protective cover; 7. Heat-conducting plate; 8. Liquid replenishment pipe; 9. Baffle. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] Please see Figure 1-5 This utility model provides a technical solution: a polypropylene powder drying device, comprising:

[0024] The tank 1, base 2, and dual drying mechanism 3 are provided. The top of the tank 1 is equipped with a feeding frame and the bottom is connected to a discharge valve pipe. The tank 1 is fixed on the top of the base 2. The surface of the tank 1 is equipped with a dual drying mechanism 3, which is used to heat the bottom and sides of the tank 1 simultaneously to increase the heating range.

[0025] The dual drying mechanism 3 includes a storage tank 31, a heating pipe 32, and a heat transfer component 33. The storage tank 31 is fixed to the bottom of the tank body 1 and is used to store heat transfer oil and heat the bottom of the tank body 1. The heating pipe 32 is installed inside the storage tank 31, and the heat transfer component 33 is installed on the surface of the tank body 1 and is used to heat the side of the tank body 1.

[0026] Specifically, a dual drying mechanism 3 is provided on the surface of the tank 1, which can heat the bottom and sides of the tank 1 with a single heat source and dry the polypropylene powder inside the tank 1. The single heat source heats the bottom and sides of the tank 1 at the same time, avoiding the energy loss of traditional multi-heat source systems. Through the circulation of heat transfer oil between the storage tank 31 and the spiral heat transfer tube 333, the heat is fully distributed to all parts of the tank 1.

[0027] The heat transfer component 33 includes a pump body 331, a delivery pipe 332, a heat transfer pipe 333, and a drain pipe 334. The heat transfer pipe 333 is spiral-shaped and installed on the surface of the tank body 1. The delivery pipe 332 is connected between the liquid inlet end of the heat transfer pipe 333 and the storage tank 31. The pump body 331 is connected inside the delivery pipe 332. The drain pipe 334 is connected between the liquid outlet end of the heat transfer pipe 333 and the storage tank 31.

[0028] Furthermore, a high-temperature centrifugal pump is used as the pump body 331, and the delivery pipe 332 is made of stainless steel seamless pipe. The pump body 331 sends the heat transfer oil into the heat transfer pipe 333 through the delivery pipe 332. The oil flows from top to bottom along the spiral path and exchanges heat with the wall of the tank 1 through convection. The pump body 331 pumps the high-temperature heat transfer oil in the storage tank 31 into the spiral heat transfer pipe 333 through the delivery pipe 332. The heat transfer oil flows along the spiral path and releases heat to the side of the tank 1. Then it returns to the storage tank 31 through the drain pipe 334 for circulating heating. The spiral structure extends the heat exchange path of the heat transfer oil on the side of the tank 1, so that the tank 1 is heated evenly in all directions. The temperature range of the heating pipe is 120-180℃.

[0029] A heat-conducting ring 4 is fixedly installed on the surface of the tank body 1. The outer surface of the heat-conducting ring 4 is provided with a spiral groove 5 for fitting with the heat transfer tube 333.

[0030] It is worth noting that the heat transfer tube 333 is embedded in the spiral groove 5 of the heat conduction ring 4, which increases the heat transfer area through surface contact. The heat conduction ring 4 serves as a heat equalization layer to avoid stress concentration caused by direct welding of the spiral heat transfer tube 333 to the tank body 1.

[0031] A protective cover 6 is fitted on the surface of the heat transfer tube 333. The protective cover 6 is fixed to the surface of the tank body 1 and is set as a heat insulation cover.

[0032] Specifically, the protective cover 6 encloses the heat transfer tube 333 to reduce heat loss to the environment, and the protective layer prevents operators from coming into contact with the high-temperature pipeline, thus improving safety.

[0033] A heat-conducting plate 7 is embedded in the top of the storage tank 31. The top of the heat-conducting plate 7 is in contact with the bottom of the tank body 1, and a liquid replenishment pipe 8 is provided on the surface of the storage tank 31.

[0034] The heat plate conducts the heat of the heat transfer oil in the storage tank 31 to the bottom of the tank body 1; the replenishment pipe 8 is used to replenish the heat transfer oil leaked in the system. The replenishment pipe 8 is designed to allow the system to be maintained online, reducing downtime, and the top of the replenishment pipe 8 is threaded with a sealing cap.

[0035] Two partitions 9 are fixedly installed inside the storage tank 31. The ends of the two partitions 9 are fixed to the front and back of the inner wall of the storage tank 31, respectively, forming an S-shaped channel to extend the path of the drain pipe 334 to discharge the oil.

[0036] It should be noted that the low-temperature oil returned by the drain pipe 334 flows along the S-shaped channel, extending the contact path with the heating pipe 32, and ensuring that the discharged oil is fully heated.

[0037] A stirrer is installed inside the tank 1 for stirring the polypropylene powder inside the tank 1.

[0038] The agitator in this application includes a motor and a stirring paddle. By starting the motor, the stirring paddle is driven to rotate, which stirs the powder in the tank 1. The rotation of the agitator causes the polypropylene powder to tumble, promoting contact between the particles and the hot wall surface.

[0039] The heating element 32, stirrer, and pump body 331 involved in this application are all implemented using existing mature technologies and are connected to an external PLC controller and power supply. This is a conventional technical means in this field, so their specific circuit connections, control logic, and working processes will not be described in detail.

[0040] This device pours polypropylene powder into tank 1 and activates heating pipe 32 to heat the heat transfer oil in storage tank 31. The heat in storage tank 31 is transferred to the bottom of tank 1 through heat transfer plate 7. Pump 331, a high-temperature resistant pump, is then activated to deliver the hot oil into delivery pipe 332, which then enters heat transfer pipe 333. The heat transfer pipe 333 is spirally positioned on the surface of tank 1, enabling heating of the side of tank 1. Furthermore, a spirally mounted heat-conducting ring 4 is installed on the surface of tank 1, which contacts the heat transfer pipe 333. The tank has a larger volume, and a protective cover 6 is installed on the outside of the tank 1 to keep it warm and reduce heat loss. The heat transfer oil enters the storage tank 31 through the drain pipe 334. Since two baffles 9 are installed in the storage tank 31 to form an S-shaped path, the path of the discharged heat transfer oil is extended and it is fully heated by the heating pipe 32. An agitator is installed in the tank 1 to stir the polypropylene powder. A portion of the polypropylene powder can be taken out for observation. Drying is stopped after drying is completed, and drying continues for the undried portion.

[0041] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A polypropylene powder drying device, characterized in that, include: The tank (1), base (2) and dual drying mechanism (3) are provided. The top of the tank (1) is provided with a feeding frame and the bottom is connected with a discharge valve pipe. The tank (1) is fixed on the top of the base (2). The surface of the tank (1) is provided with a dual drying mechanism (3) for synchronous heating of the bottom and side of the tank (1) to increase the heating range. The dual drying mechanism (3) includes a storage tank (31), heating pipes (32) and heat transfer components (33). The storage tank (31) is fixed to the bottom of the tank body (1) and is used to store heat transfer oil and heat the bottom of the tank body (1). The heating pipes (32) are installed inside the storage tank (31). The heat transfer components (33) are installed on the surface of the tank body (1) and are used to heat the side of the tank body (1).

2. The polypropylene powder drying equipment according to claim 1, characterized in that: The heat transfer component (33) includes a pump body (331), a delivery pipe (332), a heat transfer tube (333), and a drain pipe (334). The heat transfer tube (333) is spiral-shaped and installed on the surface of the tank (1). The inlet end of the heat transfer tube (333) is connected to the storage tank (31) by a delivery pipe (332). The pump body (331) is connected inside the delivery pipe (332). The drain end of the heat transfer tube (333) is connected to the storage tank (31) by a drain pipe (334).

3. The polypropylene powder drying equipment according to claim 2, characterized in that: A heat-conducting ring (4) is fixedly installed on the surface of the tank (1), and a spiral groove (5) is provided on the outer surface of the heat-conducting ring (4) for fitting with the heat transfer tube (333).

4. The polypropylene powder drying equipment according to claim 3, characterized in that: The heat transfer tube (333) is covered with a protective cover (6), which is fixed to the surface of the tank (1) and is configured as a heat insulation cover.

5. The polypropylene powder drying equipment according to claim 1, characterized in that: The storage tank (31) has a heat-conducting plate (7) embedded in the top. The top of the heat-conducting plate (7) is in contact with the bottom of the tank (1), and the surface of the storage tank (31) is provided with a liquid replenishment pipe (8).

6. The polypropylene powder drying equipment according to claim 5, characterized in that: The storage tank (31) has two partitions (9) fixedly installed inside. The ends of the two partitions (9) are fixed to the front and back of the inner wall of the storage tank (31) respectively, forming an S-shaped channel to extend the path of the drain pipe (334) to discharge the oil.

7. The polypropylene powder drying equipment according to claim 1, characterized in that: A stirrer is installed inside the tank (1) for stirring the polypropylene powder inside the tank (1).

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