CN219064002U

CN219064002U - EPP foaming sampling drying device

Info

Publication number: CN219064002U
Application number: CN202221817724.1U
Authority: CN
Inventors: 曾佳; 杨亮炯; 朱民; 刘缓缓
Original assignee: Wuxi Hi Tec Environmental Material Co ltd
Current assignee: Wuxi Hi Tec Environmental Material Co ltd
Priority date: 2022-07-14
Filing date: 2022-07-14
Publication date: 2023-05-23
Anticipated expiration: 2032-07-14

Abstract

The EPP foaming sampling drying device comprises a drying container to be dried, wherein a feeding pipeline and a discharging pipeline are arranged on the drying container, a ventilation net surface is arranged on the side wall of the drying container, the mesh diameter is 1-2mm, an upper air heater is arranged on the upper part of the drying container, and the position of an air inlet of the upper air heater on the drying container is higher than the ventilation net surface; a lower air heater is arranged at the lower part of the drying container, and the position of an air inlet of the lower air heater on the drying container is lower than the ventilation net surface; the upper air heater and the lower air heater are respectively positioned on two opposite sides of the drying container, the upper air heater is used for obliquely downwards blowing and the lower air heater is used for obliquely upwards blowing in the vertical direction, and the upper air heater and the lower air heater are respectively used for obliquely blowing in the horizontal direction so as to form a hot air cyclone for stirring materials in the vertical direction in the drying container. According to the utility model, through fully drying EPP particles in the foaming process, fluctuation of product density is reduced to the minimum, so that stable production of EPP in the subsequent production process is ensured.

Description

EPP foaming sampling drying device

Technical Field

The utility model belongs to the field of EPP foaming material preparation devices, and particularly relates to an EPP foaming sampling drying device.

Background

The expanded polypropylene (EPP) is a polypropylene foaming material taking supercritical carbon dioxide as a medium, and compared with the traditional polypropylene, the expanded polypropylene has lighter specific gravity and relatively excellent mechanical property, and can be used in the fields of packaging, automobile inner liners, children toys, high-speed rail, aerospace and the like; compared with the traditional Expanded Polystyrene (EPS), the novel heat-resistant and environment-friendly Expanded Polystyrene (EPS) has good heat resistance and environmental protection characteristics, is continuously endowed with new development and application in recent years, and has very wide development space especially in fresh air systems and new energy battery packages.

Although the EPP material has wide application prospect and mature technology, a plurality of places which are difficult to control still exist in the production process, wherein the control of the density in the EPP foaming process is important. The fluctuation of density can directly influence steam energy consumption and dimensional stability in product molding, and common practice in production is to make EPP product reach the relatively even degree of dispersion through the mode of blending before molding, but do so can't cure, along with the lapse of live time, expanded particle can be layered gradually along with flowing, forms the heavy situation of first light foot again, seriously influences stability and whole production efficiency of production process to product weight control.

In the EPP primary foaming stage, water is adopted as a medium for foaming, the humidity of particles is relatively high during foaming and pressure relief, and the density is tested in a particle stacking mode in the traditional foaming sampling density measurement mode, so that the fluctuation of the sampling density is caused by moist particles, the lighter the density is, the more serious the fluctuation of the product density is, the prevention is carried out from the source, and the drying of the sampling particles is very critical.

Disclosure of Invention

The utility model aims to provide an EPP foaming sampling drying device, which can minimize fluctuation of product density through fully drying EPP particles in the foaming process, thereby ensuring stable production of EPP in the subsequent production process.

In order to achieve the above purpose, the technical scheme adopted by the utility model is as follows: the EPP foaming sampling drying device comprises a drying container to be dried, wherein a feeding pipeline and a discharging pipeline are arranged on the drying container, a ventilation net surface is arranged on the side wall of the drying container, the mesh diameter is 1-2mm, an upper air heater is arranged on the upper part of the drying container, and the position of an air inlet of the upper air heater on the drying container is higher than the ventilation net surface; a lower air heater is arranged at the lower part of the drying container, and the position of an air inlet of the lower air heater on the drying container is lower than the ventilation net surface; the upper air heater and the lower air heater are respectively positioned on two opposite sides of the drying container, the upper air heater is used for obliquely downwards blowing and the lower air heater is used for obliquely upwards blowing in the vertical direction, and the upper air heater and the lower air heater are respectively used for obliquely blowing in the horizontal direction so as to form a hot air cyclone for stirring materials in the vertical direction in the drying container.

The upper air heater is communicated with the drying container through an upper air pipe, the upper air pipe is a straight pipe, and the downward inclination angle is 30-45 degrees.

The lower air heater is communicated with the drying container through a lower air pipe, the lower air pipe is a straight pipe, and the upward inclination angle is 30-45 degrees.

The inclination angle of the blowing direction of the upper air heater and the blowing direction of the lower air heater in the horizontal plane is 30-45 degrees.

The upper part of the drying container is a cylindrical section, the lower part of the drying container is an inverted conical section, and the lower air heater is connected to the conical section.

The ventilation net surface is arranged on the cylindrical section, and the height of the ventilation net surface is smaller than that of the cylindrical section, so that the upper end and the lower end of the ventilation net surface are respectively spaced from the upper edge and the lower edge of the cylindrical section.

The upper part of the ventilation net surface is connected with a compressed air pipeline which is used for cleaning the material residue in the drying container.

The feeding pipeline is provided with a feeding valve, and the discharging pipeline is provided with a discharging valve.

The feeding valve and the discharging valve are butterfly valves.

The beneficial effects of the utility model are as follows: the utility model starts from the source, fully dries EPP particles in the foaming process, and reduces the fluctuation of the product density to the minimum, thereby ensuring the stable production process of EPP.

According to the utility model, the upper air heater and the lower air heater are arranged up and down on opposite sides, and hot air is blown into the drying container in a vertical direction and a horizontal direction respectively at a certain inclination angle, so that hot air rotational flow is formed in the vertical direction in the drying container, EPP particles in the container are stirred, EPP particles are enabled to roll, drying efficiency is accelerated, and drying effect is improved.

The ventilation net surface provided by the utility model is beneficial to carrying moisture out of the container by hot air, is convenient for drying EPP particles, and can prevent EPP particles from leaking out due to the size of the net.

According to the utility model, the compressed air pipeline connected with the ventilation net surface can be used for introducing compressed air into the container after discharging so as to clean residual materials in the container.

Through the cooperative work of the structure, the EPP raw materials for foaming sampling are dried to the greatest extent, the accuracy and operability of process density monitoring are improved, and the density stability of the whole production is ensured.

Drawings

FIG. 1 is a schematic diagram of the structure of the present utility model;

FIG. 2 is a schematic diagram of the blowing angle of the upper air heater in the horizontal direction;

FIG. 3 is a schematic diagram of the blowing angle of the lower air heater in the horizontal direction;

the marks in the figure: 1. the drying container comprises a drying container body, 2, a feeding pipeline, 3, a feeding valve, 4, an upper air heater, 5, an upper air pipe, 6, a ventilation net surface, 7, a discharging pipeline, 8, a discharging valve, 9, a lower air heater, 10, a lower air pipe, 11, a conical section, 12, a compressed air pipeline, 13, a cylindrical section, 14, an upper air blowing port, 15 and a lower air blowing port.

Detailed Description

The utility model is described in further detail below with reference to the drawings and examples, which are not intended to be limiting.

Referring to fig. 1-3, an EPP foaming sampling drying device comprises a drying container 1, a feeding pipeline 2, an upper air heater 4, a compressed air pipeline 12, a lower air heater 9 and a discharging pipeline 7.

The whole drying container 1 is a cone-column complex, the upper part of the drying container is a cylindrical section 13, the lower part of the drying container is an inverted conical section 11, and the large-diameter end of the conical section 11 is fixedly connected with the lower edge of the cylindrical section 13; the center of the top surface of the cylindrical section 13 is connected with the feeding pipeline 2, the feeding pipeline 2 is provided with a feeding valve 3, and the feeding valve 3 adopts a butterfly valve; the small diameter end of the conical section 11 is connected with the discharging pipeline 7, the discharging pipeline 7 is provided with a discharging valve 8, and the discharging valve 8 also adopts a butterfly valve; the inlet valve 3 and the discharge valve 8 may also take other forms of valve.

Meshes are densely distributed on one section of the cylindrical surface of the cylindrical section 13 to form a ventilation net surface 6 which is communicated with the inner cavity of the container and the outside, and the diameter of the meshes is 1-2mm so as to prevent EPP particles in the container from leaking out. The height of the ventilation net surface 6 is smaller than that of the cylindrical section 13, so that a certain distance is reserved between the upper end and the lower end of the ventilation net surface 6 and the upper edge and the lower edge of the cylindrical section 13 respectively, and the structural strength of the cylindrical section 13 is ensured.

An upper air blowing port 14 is arranged on the cylindrical surface between the upper end of the ventilation net surface 6 and the upper edge of the cylindrical section 13, the upper air blowing port 14 is connected with the upper air heater 4 through an upper air pipe 5, and the upper air heater 4 blows hot air into the drying container 1 through the upper air pipe 5. A lower air blowing port 15 is arranged on the conical surface of the conical section 11, the lower air blowing port 15 is connected with a lower air heater 9 through a lower air pipe 10, and the lower air heater 9 blows hot air into the drying container 1 through the lower air pipe 10. The lower air heater 9 and the upper air heater 4 are respectively arranged on two opposite sides of the drying container 1.

The upper air pipe 5 is inclined downwards by 30-45 degrees in the vertical direction, so that the air outlet position of the upper air pipe 5 is lower than the air inlet position of the upper air pipe 5, and the upper air pipe 5 is inclined rightwards by 30-45 degrees in the horizontal direction compared with the central axis of the drying container 1, so that hot air blown by the upper air heater 4 forms a hot air cyclone rotating rightwards and downwards.

As for the understanding that the upper duct is inclined to the right by 30 ° to 45 ° in the horizontal direction compared to the central axis of the drying container, referring to fig. 2, the upper duct 5 is simplified to be represented as a straight line in the drawing, and the upper duct 5 is inclined to the right in the horizontal direction to blow air, and the included angle α between the blown air flow and the radius r passing through the upper air blowing port 14 is 30 ° to 45 °.

The lower air pipe 10 is inclined upwards by 30-45 degrees in the vertical direction, so that the air outlet position of the lower air pipe 10 is higher than the air inlet position of the lower air pipe 10, and the lower air pipe 10 is inclined rightwards by 30-45 degrees in the horizontal direction compared with the central axis of the drying container 1, so that the hot air blown by the lower hot air blower 9 forms a hot air cyclone rotating rightwards and upwards.

As for the understanding that the lower duct is inclined to the right 30 ° to 45 ° in the horizontal direction compared to the central axis of the drying container, referring to fig. 3, the lower duct 10 is simplified to be represented as a straight line in the drawing, and the lower duct 10 is inclined to the right in the horizontal direction to blow, and the included angle β between the blown air flow and the radius r passing through the lower air blowing port 15 is 30 ° to 45 °.

The upper air heater 4 and the lower air heater 9 blow out hot air to act on the materials in the drying container 1 in a cyclone manner, the materials are stirred and rolled, and when the hot air leaves the drying container 1 through the ventilation net surface 6, the moisture of the materials is taken away, so that the effect of drying the materials is achieved.

The upper air heater 4 and the lower air heater 9 provided in this embodiment are both inclined to the right in the horizontal direction to form a cyclone with the right hand, and it can be understood that the two air heaters can also be inclined to the left to form a cyclone with the left hand, so that the materials can be stirred.

The upper part of the ventilation net surface 6 is also connected with a compressed air pipeline 12 which is used for introducing compressed air into the drying container 1, and the compressed air pipeline 12 is used for purging and cleaning the residual materials of the drying container 1 after discharging.

The above embodiments are only for illustrating the technical solution of the present utility model and not for limiting it, and it should be understood by those skilled in the art that modifications and equivalents may be made to the specific embodiments of the present utility model with reference to the above embodiments, and any modifications and equivalents not departing from the spirit and scope of the present utility model are within the scope of the claims appended hereto.

Claims

1. EPP foaming sampling drying device, including holding the drying container that waits to dry, be provided with feeding pipeline and blowing pipeline on the drying container, its characterized in that: the side wall of the drying container is provided with a ventilation net surface, the mesh diameter is 1-2mm, the upper part of the drying container is provided with an upper air heater, and the position of an air inlet of the upper air heater on the drying container is higher than the ventilation net surface; a lower air heater is arranged at the lower part of the drying container, and the position of an air inlet of the lower air heater on the drying container is lower than the ventilation net surface; the upper air heater and the lower air heater are respectively positioned on two opposite sides of the drying container, the upper air heater is used for obliquely downwards blowing and the lower air heater is used for obliquely upwards blowing in the vertical direction, and the upper air heater and the lower air heater are respectively used for obliquely blowing in the horizontal direction so as to form a hot air cyclone for stirring materials in the vertical direction in the drying container.

2. The EPP foaming sampling and drying device according to claim 1, wherein: the upper air heater is communicated with the drying container through an upper air pipe, the upper air pipe is a straight pipe, and the downward inclination angle is 30-45 degrees.

3. The EPP foaming sampling and drying device according to claim 2, wherein: the lower air heater is communicated with the drying container through a lower air pipe, the lower air pipe is a straight pipe, and the upward inclination angle is 30-45 degrees.

4. An EPP foam sampling and drying device according to claim 3, wherein: the inclination angle of the blowing direction of the upper air heater and the blowing direction of the lower air heater in the horizontal plane is 30-45 degrees.

5. The EPP foaming sampling and drying device according to claim 1, wherein: the upper part of the drying container is a cylindrical section, the lower part of the drying container is an inverted conical section, and the lower air heater is connected to the conical section.

6. The EPP foam sampling and drying device according to claim 5, wherein: the ventilation net surface is arranged on the cylindrical section, and the height of the ventilation net surface is smaller than that of the cylindrical section, so that the upper end and the lower end of the ventilation net surface are respectively spaced from the upper edge and the lower edge of the cylindrical section.

7. The EPP foaming sampling and drying device according to claim 1, wherein: the upper part of the ventilation net surface is connected with a compressed air pipeline which is used for cleaning the material residue in the drying container.

8. The EPP foaming sampling and drying device according to claim 1, wherein: the feeding pipeline is provided with a feeding valve, and the discharging pipeline is provided with a discharging valve.

9. The EPP foam sampling and drying device according to claim 8, wherein: the feeding valve and the discharging valve are butterfly valves.