Cooling device for plastic particle production

Abstract

The utility model belongs to the technical field of chemical production equipment, and discloses a cooling device for plastic particle production, which comprises a cooling tower, the top of the cooling tower is provided with a feed port and an air outlet, and the air outlet is communicated with an air storage tank through a pipeline and an induced draft fan; a hollow vent pipe is arranged in the center of a tower body of the cooling tower from top to bottom, a plurality of vent holes are uniformly formed in the pipe wall of the vent pipe, and material distributors are respectively arranged at the upper part, the middle part and the lower part of the pipe wall of the vent pipe; the air storage tank is also communicated with a freeze dryer through a pipeline; and the freeze dryer is respectively communicated with the vent pipe and a gas distributor arranged in the cooling tower body through an air blower. The cooling device is simple in structure, convenient to use, good in cooling effect and capable of achieving continuous production.

Description

Technical Field

[0001] The utility model belongs to the technical field of chemical production equipment, and particularly relates to a cooling device for plastic particle production. Background Art

[0002] In the production process of plastic films, there will be a lot of scraps, as well as some remaining materials after inspection. These materials need to be granulated and sliced and then recycled into production. In the production process of other plastic products, such as the production of recycled plastics, a granulation process is also required. When plastic particles are produced, since the plastic particles after production discharge have a relatively high temperature, the just-produced plastic particles are very easy to stick together. Therefore, a cooling device needs to be used to cool them to a lower temperature before collection and packaging. In the prior art, a blower is generally used to cool the plastic particles by air cooling. However, in this way, since the plastic particles will accumulate together, the cooling is relatively slow, which greatly reduces the cooling efficiency. Slow cooling is likely to cause caking, thus affecting the quality of plastic particles. Summary of the Invention

[0003] The technical problem to be solved by the utility model is to provide a cooling device for plastic particle production, which overcomes the defects of the prior art, has a simple structure and is convenient to use, can cool the material from the inside and the periphery, has a fast cooling speed and good cooling effect, and can realize continuous production.

[0004] To solve the above technical problem, the technical solution of the utility model is:

[0005] A cooling device for plastic particle production includes a cooling tower. The top of the cooling tower is provided with a feed inlet and an air outlet. The air outlet is connected to an air storage tank through a pipeline and an induced draft fan. A hollow air-permeable pipe is arranged vertically downward in the center of the tower body of the cooling tower. A plurality of air-permeable holes are uniformly arranged on the pipe wall of the air-permeable pipe. Material distributors are respectively arranged on the upper, middle and lower parts of the pipe wall of the air-permeable pipe. The air storage tank is also connected to a freeze dryer through a pipeline. The freeze dryer is respectively connected to the air-permeable pipe and a gas distributor arranged in the tower body of the cooling tower through a blower.

[0006] Preferably, the distance from the bottom of the air-permeable pipe to the bottom of the cooling tower is one-fourth of the tower body height.

[0007] Preferably, the material distributors are arranged on the air-permeable pipe at the heights of one-third, one-half and two-thirds of the tower body height of the cooling tower.

[0008] Preferably, the gas distributor is provided with uniform grids or mesh holes, and its material is preferably a poor heat conductor such as ceramic, glass, etc.

[0009] Preferably, three gas distributors are provided, and are respectively connected to the freeze dryer through pipelines and blowers.

[0010] Preferably, the gas distributors are respectively arranged at the quarter, half, and three-quarter heights of the inner side wall of the cooling tower body, and the three gas distributors are distributed at an angle of 120° to each other when viewed from above.

[0011] Preferably, the induced draft fan is a centrifugal induced draft fan.

[0012] Preferably, the freeze dryer is a refrigerated compressed air dryer.

[0013] Preferably, the connecting pipe between the freeze dryer and the air distributor is provided with a heat insulation layer.

[0014] Preferably, the air storage tank is a pressure-resistant storage tank.

[0015] Preferably, the blower is a Roots blower.

[0016] Preferably, the bottom of the cooling tower is provided with a discharge port, and the discharge port is connected to the post-process treatment equipment through a pipeline.

[0017] Due to the adoption of the above technical solutions, the beneficial effects of the present utility model are as follows:

[0018] The present utility model uses a material distributor to disperse plastic particles, and uses a breather pipe to introduce low-temperature and dry air from the inside of the material and from the outside of the material through the gas distributor for cooling. Therefore, the plastic particles have good dispersibility and will not accumulate together, thus greatly improving the cooling efficiency; the cooled gas is transported to the air storage tank by the induced draft fan for temporary storage and then enters the freeze dryer. After the humid and hot air is freeze-dried, it is continuously transported back to the cooling tower for use, enabling the air to be recycled; the cooled material can be output through the discharge port, and continuous production from the top feeding and bottom discharging can be achieved.

[0019] In summary, the present utility model has a simple structure, is easy to use, has good cooling effect, and can achieve continuous production. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a schematic structural diagram of an embodiment of the present utility model;

[0021] In the figure, 1. Cooling tower; 2. Induced draft fan; 3. Air storage tank; 4. Breather pipe; 5. Vent hole; 6. Material distributor; 7. Freeze dryer; 8. Blower; 9. Gas distributor. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0022] The present utility model will be further described below in conjunction with the drawings and embodiments.

[0023] As Figure 1As shown in the figure, the utility model is a cooling device for plastic particle production, which includes a cooling tower 1. The top of the cooling tower 1 is provided with a feed inlet (not marked) and an air outlet (not marked). The air outlet is connected to an air storage tank 3 through a pipeline (not marked) and an induced draft fan 2. A hollow air permeable pipe 4 is arranged vertically downward in the center of the tower body of the cooling tower 1. A plurality of air permeable holes 5 are evenly arranged on the pipe wall of the air permeable pipe 4. Bell-shaped material distributors 6 are respectively arranged on the upper, middle and lower parts of the pipe wall of the air permeable pipe 4. The air storage tank 3 is also connected to a freeze dryer 7 through a pipeline. The freeze dryer 7 is respectively connected to the air permeable pipe 4 and a gas distributor 9 arranged in the tower body of the cooling tower 1 through a blower 8.

[0024] During actual production: First, fill the air storage tank 3 with air, and then turn on the induced draft fan 2, the blower 8 and the freeze dryer 7 to cool and dry the air and form a cycle. Input the material from the feed inlet. The material is fully dispersed under the dispersion of the material distributor 6 and the blowing action of the cold air blown out by the air permeable pipe 4. These materials are simultaneously cooled from the inside and outside of the material through the air permeable pipe 4 and the gas distributor 9, and the material is evenly cooled. Moreover, the freeze dryer 7 can reduce the air temperature to below ten degrees, so each particle will be quickly cooled. The heated air, together with a small amount of water vapor evaporated from the material, is transported from the top of the cooling tower 1 to the air storage tank 3 through the negative pressure formed by the induced draft fan 2, and then transported to the freeze dryer 7 for continued use after freeze drying. The gas lost during the production process can be supplemented by an externally provided air compressor to transport external air into the air storage tank 3. The dried material is then transported to the processing equipment of the subsequent process through the discharge port and the pipeline for further processing.

[0025] It should be understood that these embodiments are only used to illustrate the utility model and not to limit the scope of the utility model. In addition, it should be understood that after reading the content taught by the utility model, those skilled in the art can make various changes or modifications to the utility model, and these equivalent forms also fall within the scope defined by the appended claims of this application.

Claims

1. A cooling device for plastic particle production, characterized in that: It includes a cooling tower. At the top of the cooling tower, there are a feed inlet and an air outlet. The air outlet is connected to an air storage tank through a pipeline and a draft fan. In the center of the tower body of the cooling tower, there is a hollow air-permeable pipe arranged from top to bottom. A number of air-permeable holes are evenly arranged on the pipe wall of the air-permeable pipe. Material distributors are respectively arranged at the upper, middle and lower parts of the pipe wall of the air-permeable pipe. The air storage tank is also connected to a freeze dryer through a pipeline. The freeze dryer is respectively connected to the air-permeable pipe and a gas distributor arranged in the tower body of the cooling tower through a blower.

2. The cooling device for plastic particle production according to claim 1, characterized in that: The bottom of the air-permeable pipe is at a distance of one-fourth of the tower body height from the bottom of the cooling tower.

3. The cooling device for plastic particle production according to claim 1, characterized in that: The material distributors are arranged on the air-permeable pipe at the heights of one-third, one-half and two-thirds of the tower body height of the cooling tower.

4. The cooling device for plastic pellet production according to claim 1, characterized in that: There are three gas distributors, which are respectively connected to the freeze dryer through pipelines and a blower.

5. The cooling device for plastic particle production according to claim 1, characterized in that: The gas distributors are respectively arranged at the heights of one-fourth, one-half and three-fourths of the inner side wall of the tower body of the cooling tower.

6. The cooling device for plastic pellet production according to claim 1, wherein: A heat-insulating layer is arranged on the connecting pipeline between the freeze dryer and the air distributor.

7. The cooling device for plastic particle production according to claim 1, wherein: The air storage tank is a pressure-resistant storage tank.

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