CN218314740U

CN218314740U - Low molecular weight polyethylene degassing and cooling device

Info

Publication number: CN218314740U
Application number: CN202222612931.XU
Authority: CN
Inventors: 赵浩民
Original assignee: Shandong Haona New Material Technology Group Co ltd
Current assignee: Shandong Haona New Material Technology Group Co ltd
Priority date: 2022-09-30
Filing date: 2022-09-30
Publication date: 2023-01-17
Anticipated expiration: 2032-09-30

Abstract

The utility model discloses a polyethylene wax degassing and cooling device, which comprises a degassing tank and a cooling bucket; a feeding pipe is arranged at the top of the degassing tank, a stirring motor is arranged at the center of the top of the degassing tank and is connected with the degassing tank through a sealing seat, the stirring motor is connected with a stirring paddle in the degassing tank, a recovery pipe and a vent pipe are arranged at the top of the degassing tank, a maintenance hole and a tank pressure detector are arranged at the top of the degassing tank, a liquid level detector is arranged on the inner wall of the degassing tank, and a discharging pipe is arranged at the bottom of the degassing tank; the cooling hopper is connected with the discharging pipe, the bottom of the cooling hopper is open, a plurality of push-cutting rollers are arranged in the cooling hopper, a refrigerator is arranged at the bottom of the cooling hopper, and the width of the cooling hopper is gradually reduced from top to bottom.

Description

Low molecular weight polyethylene degassing cooling device

Technical Field

The utility model belongs to the technical field of low molecular weight polyethylene production facility, concretely relates to low molecular weight polyethylene degasification cooling device.

Background

The polyethylene wax is low-molar-mass polyethylene with molar mass of 500-5000g/mol, melting point higher than 90 ℃ and relative density of 0.92-0.936g/cm ³ And the color is mostly white or yellowish. Because of its high melting point, low melt viscosity, excellent wear resistance, thermal stability and lubricity, it can be used as lubricant and dispersant in various fields. The polymerization and cracking processes are for the production of polyethyleneThe two most important methods of wax are that domestic manufacturers mostly adopt cracking production process, namely, raw materials are subjected to high-temperature thermal cracking or catalytic cracking at more than 300 ℃ under anaerobic condition to produce polyethylene wax products, nitrogen is generally filled to create anaerobic condition, but after production is finished, nitrogen is directly discharged into air to cause resource waste, in addition, the temperature of the polyethylene wax after production is about 300 ℃, the polyethylene wax can be packaged after cooling and solidification, the method of natural cooling is adopted, and the time is long, so that the production period is increased.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving the defect that prior art exists, and provide a low molecular weight polyethylene degasification cooling device, retrieve nitrogen gas and recycle, reduction in production cost increases cooling device simultaneously, has small, advantage that cooling rate is fast, can effectively shorten production cycle, improves production efficiency.

In order to achieve the above purpose, the utility model provides a following technical scheme: a polyethylene wax degassing and cooling device comprises a degassing tank and a cooling bucket; a feeding pipe is arranged at the top of the degassing tank, a stirring motor is arranged at the center of the top of the degassing tank and connected with the degassing tank through a sealing seat, the stirring motor is connected with a stirring paddle in the degassing tank, a recovery pipe and a vent pipe are arranged at the top of the degassing tank, a maintenance hole and a tank pressure detector are arranged at the top of the degassing tank, a liquid level detector is arranged on the inner wall of the degassing tank, and a discharging pipe is arranged at the bottom of the degassing tank; the cooling hopper is connected with the discharging pipe, the bottom of the cooling hopper is open, a plurality of push-cutting rollers are arranged in the cooling hopper, a refrigerator is arranged at the bottom of the cooling hopper, and the width of the cooling hopper is gradually reduced from top to bottom.

Preferably, the feeding pipe, the discharging pipe, the recycling pipe and the vent pipe are respectively provided with an electromagnetic valve.

Preferably, the recovery pipe is connected to a vacuum pump and a nitrogen recovery tank.

Preferably, the discharging pipe is parallel to the bottom surface of the cooling hopper, and the included angle between the discharging pipe and the horizontal plane and the included angle between the cooling hopper and the horizontal plane are 30-45 degrees.

Preferably, the push-cut roller is provided with a linear blade parallel to the roller, one end of the push-cut roller is connected with the side wall of the cooling bucket through a sealing bearing, and the other end of the push-cut roller is connected with the motor through a sealing bearing.

Preferably, the length of the push-cutting rollers decreases along with the increase of the distance from the discharging pipe, and the distance between the push-cutting rollers becomes smaller along with the increase of the distance from the discharging pipe.

Preferably, the minimum distance between the blade and the bottom surface of the cooling bucket is 2-3mm along with the rotation of the push-cutting roller.

Preferably, the refrigerator includes a semiconductor cooling fin, a heat sink, and a fan.

Compared with the prior art, the beneficial effects of the utility model are that: firstly, the structure is simple, the cost is low, the degassing effect is good, and the discharged nitrogen is recycled, so that the production cost is effectively reduced; secondly, the equipment occupies a small area, has high cooling speed and good effect, effectively shortens the production period and improves the production efficiency.

Other features of the present disclosure and advantages thereof will become apparent from the following detailed description of exemplary embodiments thereof, which proceeds with reference to the accompanying drawings.

Drawings

In order to more clearly illustrate the embodiments of the present disclosure or technical solutions in related arts, the drawings used in the description of the embodiments or related arts will be briefly introduced below, it is obvious that the drawings in the following description are only embodiments of the present disclosure, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.

FIG. 1 is a schematic view of the whole degassing and cooling apparatus of the present invention;

FIG. 2 is a partial schematic view of the degassing cooling apparatus of the present invention.

In the figure: 1. degassing tank, 2, cooling bucket, 3, solenoid valve, 4, feeding pipe, 5, maintenance hole, 6, stirring motor, 7, recovery pipe, 8, tank pressure detector, 9, seal seat, 10, stirring paddle, 11, liquid level detector, 12, vent pipe, 13, discharging pipe, 14, push-cut roller, 15, fan, 16, radiating fin, 17, semiconductor refrigeration piece, 18, refrigerator, 19, sealed bearing, 20, motor, 21 and blade.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

Unless specifically stated otherwise, the relative arrangement of the components and steps, the numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present invention. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.

For ease of description, spatially relative terms such as "over … …", "over … …", "over … …", "over", etc. may be used herein to describe the spatial positional relationship of one device or feature to another device or feature as shown in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" may include both orientations of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

Referring to fig. 1 and 2, the present invention provides a technical solution: a polyethylene wax degassing and cooling device comprises a degassing tank 1 and a cooling bucket 2; the top of the degassing tank 1 is provided with a feeding pipe 4, the center of the top of the degassing tank 1 is provided with a stirring motor 6, the stirring motor 6 is connected with the degassing tank 1 through a sealing seat 9, the stirring motor 6 is connected with a stirring paddle 10 in the degassing tank 1, the top of the degassing tank 1 is provided with a recovery pipe 7 and a vent pipe 12, the recovery pipe 7 is connected with a vacuum pump and a nitrogen recovery tank, the top of the degassing tank 1 is provided with a maintenance hole 5 and a tank pressure detector 8, the inner wall of the degassing tank 1 is provided with a liquid level detector 11, the bottom of the degassing tank 1 is provided with a discharging pipe 13, the feeding pipe 4, the discharging pipe 13, the recovery pipe 7 and the vent pipe 12 are respectively provided with an electromagnetic valve 3, the discharging pipe 13 is parallel to the bottom surface of the cooling hopper 2, and the included angle between the discharging pipe 13 and the cooling hopper 2 and the horizontal plane is 30 degrees; the cooling hopper 2 is connected with the discharging pipe 13, the bottom of the cooling hopper 2 is open, a plurality of push-cut rollers 14 are arranged in the cooling hopper 2, the push-cut rollers 14 are provided with linear blades 21 parallel to the rollers, the blades 21 rotate along with the push-cut rollers 14, the minimum distance between the bottom of the cooling hopper 2 is 2mm, one ends of the push-cut rollers 14 are connected with the side wall of the cooling hopper 2 through sealing bearings 19, the other ends of the push-cut rollers are connected with a motor 20 through sealing bearings 19, the length of the push-cut rollers 14 is reduced along with the increase of the distance between the push-cut rollers 14 and the discharge pipe 13, a refrigerator 18 is arranged at the bottom of the cooling hopper 2, the refrigerator 18 comprises a semiconductor sheet 17, a cooling fin 16 and a fan 15, and the width of the cooling hopper 2 is gradually reduced from top to bottom.

The working principle is as follows: link to each other feeding pipe 4 with reation kettle, open feeding pipe 4 and solenoid valve 3 on the recovery tube 7, the vacuum pump bleeds to degasification jar 1, negative pressure inhales polyethylene wax in degasification jar 1 through feeding pipe 4, open agitator motor 6, stirring rake 10 rotates, when liquid level detector 11 detects polyethylene wax liquid level, close feeding pipe 4 solenoid valve 3, continue to bleed to jar pressure detector 8 detects pressure when-0.04 Bar, close recovery tube 7 solenoid valve 3, close agitator motor 6, open breather pipe 12 and discharging pipe 13 solenoid valve 3, open semiconductor refrigeration piece 17 and fan 15 and refrigerate cooling bucket 2 bottom, polyethylene wax passes through discharging pipe 13 and enters cooling bucket 2 in, cool off through cooling bucket 2 bottom, open motor 20, push-cut roller 14 anticlockwise rotation, blade 21 will progressively cooled polyethylene wax to cooling bucket 2 opening part propelling movement and cut up bulk polyethylene wax solid, the polyethylene wax piece that finally cools down falls into the pail pack through cooling bucket 2 opening.

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

Claims

1. The utility model provides a polyethylene wax degasification cooling device, includes degasification jar (1) and cooling bucket (2), its characterized in that: the degassing device is characterized in that a feeding pipe (4) is arranged at the top of the degassing tank (1), a stirring motor (6) is arranged at the center of the top of the degassing tank (1), the stirring motor (6) is connected with the degassing tank (1) through a sealing seat (9), the stirring motor (6) is connected with a stirring paddle (10) in the degassing tank (1), a recovery pipe (7) and a vent pipe (12) are arranged at the top of the degassing tank (1), a maintenance hole (5) and a tank pressure detector (8) are arranged at the top of the degassing tank (1), a liquid level detector (11) is arranged on the inner wall of the degassing tank (1), and a discharging pipe (13) is arranged at the bottom of the degassing tank (1); the cooling hopper (2) is connected with the discharging pipe (13), the bottom of the cooling hopper (2) is open, a plurality of push-cutting rollers (14) are arranged in the cooling hopper (2), a refrigerator (18) is arranged at the bottom of the cooling hopper (2), and the width of the cooling hopper (2) is gradually reduced from top to bottom.

2. The polyethylene wax degassing and cooling apparatus according to claim 1, wherein: the feeding pipe (4), the discharging pipe (13), the recovery pipe (7) and the vent pipe (12) are respectively provided with an electromagnetic valve (3).

3. The polyethylene wax degassing and cooling apparatus according to claim 1, wherein: and the recovery pipe (7) is connected with a vacuum pump and a nitrogen recovery tank.

4. The polyethylene wax degassing and cooling apparatus according to claim 1, wherein: the discharging pipe (13) is parallel to the bottom surface of the cooling hopper (2), and the included angle between the discharging pipe (13) and the horizontal plane and the included angle between the cooling hopper (2) and the horizontal plane are 30-45 degrees.

5. The polyethylene wax degassing and cooling apparatus according to claim 1, wherein: the push-cut roller (14) is provided with a linear blade (21) parallel to the roller, one end of the push-cut roller (14) is connected with the side wall of the cooling bucket (2) through a sealing bearing (19), and the other end of the push-cut roller is connected with a motor (20) through the sealing bearing (19).

6. The polyethylene wax degassing and cooling apparatus according to claim 1, wherein: the length of the push-cutting rollers (14) is reduced along with the increase of the distance from the discharging pipe (13), and the distance between the push-cutting rollers (14) is reduced along with the increase of the distance from the discharging pipe (13).

7. The polyethylene wax degassing and cooling apparatus according to claim 5, wherein: the minimum distance between the blade (21) and the bottom surface of the cooling hopper (2) along with the rotation of the push-cutting roller (14) is 2-3mm.

8. The polyethylene wax degassing and cooling apparatus according to claim 1, wherein: the refrigerator (18) comprises a semiconductor refrigeration sheet (17), a heat radiation sheet (16) and a fan (15).