PA6 chip drying integrated device

Abstract

The utility model relates to the technical field of PA6 slice, concretely relates to a PA6 slice drying integrated device, including drying chamber, the inside of drying chamber is divided into three regions of upper, middle and lower through two sieve plates, the outer wall on the upper part of drying chamber corresponds the upper region and is provided with preheating jacket, the outer wall on the middle part of drying chamber corresponds the middle region and is provided with heating jacket, the outer wall on the lower part of drying chamber corresponds the lower region and is provided with cooling pipe, the top and bottom of drying chamber are provided with feeding port and discharge port respectively.In the technical scheme provided in the utility model, the utility model one aspect carries out the feeding of slicing through the feeding port, and the slicing is cooled by cooling pipe, is heated and dries by heating jacket in turn from top to bottom through the preheating and drying of preheating jacket, and the stable drying work is completed, on the other hand, through drying chamber set preheating jacket, heating jacket and cooling pipe in an organic whole, reduce the floor area, and then reduce the cost.

Description

Technical Field

[0001] This utility model relates to the field of PA6 slicing technology, and specifically to an integrated device for drying PA6 slices. Background Technology

[0002] PA6 chips contain high levels of moisture and low-molecular-weight volatiles, and must be strictly dried before melt processing.

[0003] Existing technologies typically employ rotary drum dryers or packed drying towers. Rotary drum dryers suffer from uneven drying, high energy consumption, and a tendency to cause oxidation and yellowing. While packed drying towers offer better performance, they usually require independent dehumidification, heating, and cooling systems, resulting in large floor space, complex systems, and significant energy waste due to the large amount of waste heat carried away by the hot air during exhaust. Utility Model Content

[0004] The purpose of this invention is to solve the problems of existing drying devices either having mediocre drying effects or high costs, and to provide an integrated PA6 slice drying device that ensures drying effect while reducing costs.

[0005] To achieve the above objectives, the technical solution of this utility model is as follows: An integrated PA6 slice drying device includes a drying chamber, the interior of which is divided into three regions (upper, middle, and lower) by two sieve plates. A preheating jacket is provided on the outer wall of the upper region, a heating jacket is provided on the outer wall of the middle region, and a cooling pipe is provided on the outer wall of the lower region. An inlet and an outlet are respectively provided at the top and bottom of the drying chamber.

[0006] Preferably, the drying chamber is provided with a distribution pipe, which is connected to the air outlet of the heater. Multiple nozzles are respectively provided at the upper part corresponding to the upper region and at the middle part corresponding to the middle region of the distribution pipe.

[0007] Preferably, the nozzle is configured to be tilted downwards, and the tilt angle is set to 20-30°.

[0008] Preferably, the nozzle distribution density at the upper part of the distribution pipe is greater than the nozzle distribution density at the middle part of the distribution pipe.

[0009] Preferably, a distribution plate is provided at the bottom of the drying chamber, and multiple upward-sloping jet pipes are provided on the distribution plate.

[0010] Preferably, the top of the drying chamber is provided with a dehumidification port, which is connected to the air inlet of the condenser dehumidifier. The air outlet of the condenser dehumidifier is connected to two channels, one of which is connected to the air inlet of the distribution plate and the other of which is connected to the air inlet of the heater.

[0011] Preferably, the top surface of the sieve plate is configured as a conical plate that is higher in the middle and lower around the edges.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows: In the technical solution provided by this utility model, on the one hand, the slices are fed through the feed port, and the slices pass through the preheating jacket for preheating and drying, the heating jacket for heating and drying, and the cooling pipe for cooling from top to bottom to complete a stable drying process. On the other hand, the drying chamber integrates the preheating jacket, the heating jacket, and the cooling pipe into one unit, which reduces the floor space and thus reduces the cost. Attached Figure Description

[0013] The disclosure of this utility model is illustrated with reference to the accompanying drawings. It should be understood that the drawings are for illustrative purposes only and are not intended to limit the scope of protection of this utility model. In the drawings, the same reference numerals are used to refer to the same parts. Wherein: Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a schematic diagram of the internal structure of the drying chamber of this utility model.

[0014] The diagram shows the following labels: 1. Drying chamber; 2. Preheating jacket; 3. Heating jacket; 4. Cooling pipe; 5. Exhaust port; 6. Distribution pipe; 7. Sieve plate; 8. Distribution plate; 9. Nozzle. Detailed Implementation

[0015] It is readily understood that, based on the technical solution of this utility model, those skilled in the art can propose various interchangeable structural methods and implementations without altering the essential spirit of this utility model. Therefore, the following detailed embodiments and accompanying drawings are merely illustrative descriptions of the technical solution of this utility model and should not be considered as the entirety of this utility model or as limitations or restrictions on the technical solution of this utility model.

[0016] like Figure 1-2As shown in the figure, a specific embodiment of the PA6 slice drying integrated device provided by this utility model includes a drying chamber 1, which is cylindrical in shape. Two sieve plates 7 are arranged inside the drying chamber 1, dividing the drying chamber 1 into three regions: upper, middle, and lower. The top surface of the sieve plates 7 is a conical plate with a higher center and lower edges, which facilitates the uniform downward flow of slices under gravity and prevents blockage. A preheating jacket 2 is provided on the outer wall of the upper region of the drying chamber 1, a heating jacket 3 is provided on the outer wall of the middle region of the drying chamber 1, and a heating jacket 3 is provided on the outer wall of the lower region of the drying chamber 1. Cooling pipes 4 are installed on the wall. The top and bottom of the drying chamber 1 are respectively provided with inlet and outlet. The inlet and outlet of the cooling pipes 4 are connected to the outlet and outlet of the carrier carrying the cooling medium, respectively. As an existing technology of circulating cooling, it will not be described in detail here. On the one hand, the slices are fed through the inlet. The slices pass through the preheating jacket 2 for preheating and drying, the heating jacket 3 for heating and drying, and the cooling pipes 4 for cooling from top to bottom to complete the stable drying work. On the other hand, the drying chamber 1 integrates the preheating jacket 2, the heating jacket 3 and the cooling pipes 4 into one unit, which reduces the floor space and thus reduces the cost.

[0017] The drying chamber 1 is equipped with a distribution pipe 6. The bottom of the distribution pipe 6 is connected to the air outlet of the heater through a connecting pipe. Multiple nozzles 9 are installed at the upper part of the distribution pipe 6 corresponding to the upper area and at the middle part corresponding to the middle area. Absolutely dry hot air from the heater, such as dew point < -40℃, is sprayed out from the nozzles 9 of the distribution pipe 6 and performs full and uniform heat and mass transfer with the slices to carry out the drying work. The distribution density of the nozzles 9 at the upper part of the distribution pipe 6 is greater than that at the middle part of the distribution pipe 6, to ensure the air volume and heat of the main drying area, namely the middle area.

[0018] Nozzle 9 is set to tilt downwards at an angle of 20-30° to ensure that the ejected gas undergoes the most intense cross-flow heat and mass transfer with the surrounding downward-moving slices, achieving deep dehumidification. A distribution plate 8 is installed at the bottom of the drying chamber 1, and multiple upward-moving jet pipes are installed on the distribution plate 8 to perform the final cooling work on the slices.

[0019] The top of the drying chamber 1 is equipped with a dehumidification port 5, which is connected to the air inlet of the condenser dehumidifier. The air outlet of the condenser dehumidifier is connected to two channels. One channel is connected to the air inlet of the distribution plate 8, and the other channel is connected to the air inlet of the heater. Most of the gas is heated by the heater, and a small portion of the gas enters the distribution plate 8. The air outlet of the heater is connected to the bottom of the distribution pipe 6 to achieve waste heat recovery and reduce energy consumption. It should be noted that a small amount of supplementary fresh air also needs to be introduced into the air inlet of the heater to maintain the air pressure balance in the system and control the oxygen concentration. The supplementary fresh air and the circulating gas treated by the condenser dehumidifier serve as the air source for the heater.

[0020] The wet slices enter the upper region through the feed inlet at the top of the drying chamber 1, where they undergo countercurrent heat transfer with the warm drying air from the lower region. With the help of the preheating jacket 2, the slices are preheated and their surface moisture is removed. The slices then enter the middle region, where the absolutely dry hot air sprayed from the distribution pipe 6 undergoes intense cross-flow mass transfer with the slices. With the help of the heating jacket 3, the bound water is thoroughly removed. Finally, the dried high-temperature slices are cooled to room temperature in the lower region by clean cold air introduced from the distribution plate 8 and the cooling pipe 4. Throughout the process, the airflow path is precisely designed to achieve internal energy circulation and tiered utilization, greatly reducing energy consumption.

[0021] The technical scope of this utility model is not limited to the content described above. Those skilled in the art can make various modifications and variations to the above embodiments without departing from the technical concept of this utility model, and all such modifications and variations should fall within the protection scope of this utility model.

Claims

1. An integrated device for drying PA6 slices, characterized in that: The drying chamber (1) is divided into three regions (upper, middle and lower) by two sieve plates (7). A preheating jacket (2) is provided on the outer wall of the upper region of the drying chamber (1), a heating jacket (3) is provided on the outer wall of the middle region of the drying chamber (1), and a cooling pipe (4) is provided on the outer wall of the lower region of the drying chamber (1). The top and bottom of the drying chamber (1) are respectively provided with a feed inlet and a discharge outlet.

2. The integrated PA6 slice drying device according to claim 1, characterized in that: The drying chamber (1) is equipped with a distribution pipe (6), which is connected to the outlet of the heater. Multiple nozzles (9) are respectively provided on the upper part of the distribution pipe (6) corresponding to the upper region and on the middle part corresponding to the middle region.

3. The integrated PA6 slice drying device according to claim 2, characterized in that: The nozzle (9) is set to tilt downwards, and the tilt angle is set to 20-30°.

4. The integrated PA6 slice drying device according to claim 2, characterized in that: The distribution density of the nozzles (9) at the upper part of the distribution pipe (6) is greater than that of the nozzles (9) in the middle part of the distribution pipe (6).

5. The integrated PA6 slice drying device according to claim 2, characterized in that: The bottom of the drying chamber (1) is provided with a distribution plate (8), and multiple upward-sloping jet pipes are provided on the distribution plate (8).

6. The integrated PA6 slice drying apparatus according to claim 5, characterized in that: The top of the drying chamber (1) is provided with a dehumidification port (5), which is connected to the air inlet of the condenser dehumidifier. The air outlet of the condenser dehumidifier is connected to two channels, one of which is connected to the air inlet of the distribution plate (8) and the other of which is connected to the air inlet of the heater.

7. The integrated PA6 slice drying device according to claim 1, characterized in that: The top surface of the sieve plate (7) is configured as a conical plate with a high center and low sides.

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