A separation system for high density polyethylene waxes

Abstract

The application discloses a high-density polyethylene wax separation system and belongs to the technical field of chemical separation equipment. A high-temperature steam spray tank is sleeved with a feeding kettle, and the high-temperature steam spray tank and the feeding kettle are connected through a group of annular seals. A liquid discharge pipe is arranged on the annular ring close to the bottom of the feeding kettle, a steam spraying pipe is arranged between the high-temperature steam spray tank and the feeding kettle, the steam spraying pipe is uniformly arranged on the high-temperature steam spray tank, the feeding kettle is sleeved in the high-temperature steam spray tank, a condensation kettle is arranged above the feeding kettle, a group of steam conveying pipes are arranged on the annular ring close to the top of the feeding kettle, the steam conveying pipes are communicated with the side edges of the condensation kettle, the steam conveying pipes and the feeding kettle are communicated through inclined connecting pipes, the bottom of the condensation kettle is communicated with the steam conveying pipes through an inclined pipe, and a liquid return valve is arranged on the inclined pipe. The application solves the technical problem that the existing polyethylene wax discharge tank needs to be slowly scraped by using a shovel during discharging, and is mainly applied to the field of chemical separation equipment.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of chemical separation equipment, and particularly relates to a high-density polyethylene wax separation system. BACKGROUND

[0002] Polyethylene wax (PE for short) is a by-product produced in the polyethylene production process.

[0003] Polyethylene wax is generally low-molecular-weight polyethylene with different molecular weights and molecular structures generated in the polymerization process under the action of a catalyst. Generally, its molecular weight is less than 10,000.

[0004] From the physical properties, polyethylene wax is mostly white or light yellow solid wax-like material. It has good chemical stability, cold resistance, water resistance and electrical insulation performance, etc.

[0005] In practical applications, polyethylene wax has a wide range of uses. For example, in the plastic processing industry, it can be used as a lubricant, a release agent, a dispersant, etc., and can improve the processing performance and surface performance of plastics; in the coating industry, it can improve the wear resistance, scratch resistance and stain resistance of coatings, etc.; in the ink industry, it helps to improve the friction resistance and smoothness of ink, etc.; in addition, it also has corresponding applications in rubber processing, textile, papermaking, etc.

[0006] The traditional method will add water as a coolant in the wax collection tank, resulting in a high water content in the polyethylene wax. In order to obtain high-quality wax blocks, the existing water separation tank is extruded by a screw extruder. The wax molecules will adhere to the screw rod for a long time, resulting in poor extrusion effect. At the same time, the large screw rod occupies a lot of space in the wax tank. We designed a flat push-out tank, but the polyethylene wax produced by this design is very inconvenient to shovel down slowly using a shovel knife during discharging. In view of the above problems, the present application provides a high-density polyethylene wax separation system. SUMMARY

[0007] The purpose of the present application is to provide a high-density polyethylene wax separation system to solve the technical problem that the existing flat push polyethylene wax discharge tank is very inconvenient to shovel down slowly using a shovel knife during discharging.

[0008] In order to achieve the above object, the present application provides the following technical scheme: a high-density polyethylene wax separation system, comprising a gas supply tank, a high-temperature steam spray tank, a high-temperature steam I end, a high-temperature steam II end, a feed tank and a condenser tank, the gas supply tank is connected with the high-temperature steam spray tank, characterized in that: the high-temperature steam spray tank is sleeved with the feed tank, a group of circular ring sealing connections are arranged between the high-temperature steam spray tank and the feed tank, a liquid discharge pipe is arranged on the circular ring close to the bottom of the feed tank, a steam spraying pipe is arranged between the high-temperature steam spray tank and the feed tank, the steam spraying pipe is uniformly arranged on the high-temperature steam spray tank, the high-temperature steam spray tank is sleeved with the feed tank, the condenser tank is installed above the feed tank, a group of steam conveying pipes are arranged on the circular ring close to the top of the feed tank, the steam conveying pipes are communicated with the side of the condenser tank, the steam conveying pipes are communicated with the feed tank through an inclined pipe, the bottom of the condenser tank is communicated with the steam conveying pipe through an inclined pipe, and a liquid return valve is arranged on the inclined pipe.

[0009] Preferably, the condenser tank comprises a tank body I, a finned radiator and a circular table part, the circular table part is arranged in the tank body I and the bottom of the circular table part is not in contact with the tank body I, the finned radiator is arranged on the circular table part, and a steam discharge port is arranged on the tank body I.

[0010] Preferably, the feed tank comprises a tank body II and a linear stroke mechanism, a sealing groove I is arranged on the inner side of the tank body II, a recess is arranged on the top of the tank body II, a connecting rod is arranged in the recess, a through hole is arranged on the tank body II, a sealing plate is arranged in the tank body II, the sealing plate is above the inclined pipe, the linear stroke mechanism is installed on the top of the tank body II, the telescopic end of the linear stroke mechanism penetrates through the through hole and is connected and fixed with the sealing plate, a vertical rod is arranged at the bottom of the sealing plate, a partition plate is sleeved on the vertical rod and slides on the vertical rod, a wire passing hole is arranged on the sealing plate, a connecting wire is arranged on the top surface of the partition plate, the connecting wire penetrates through the wire passing hole, passes through the upper end of the connecting rod and is fixedly connected with the top surface of the sealing plate, a sealing bottom plate is arranged at the bottom of the sealing plate, a sealing ring is fixedly arranged on the side of the sealing bottom plate, a mixed material feeding pipe is further arranged on the sealing plate and is connected with a feeding spring pipe.

[0011] Preferably, a liquid discharge valve is arranged on the liquid discharge pipe.

[0012] Preferably, the linear stroke mechanism is any one of an electric push rod, a gas cylinder and an electric cylinder.

[0013] Preferably, the partition plate is a circular ring plate with longitudinal and transverse nets.

[0014] Compared with the prior art, the present application has the following beneficial effects:

[0015] The gas supply tank uniformly sprays high-temperature steam into the feed tank, the water vapor in the polyethylene wax water in the feed tank is sprayed to the condenser tank through the steam conveying pipe and is condensed into water, and part of the water vapor is discharged;

[0016] Then the wax is shaped. The gas supply tank stops supplying gas and the return valve on the inclined pipe is opened. One of the return valves is not opened. The condensed water in the condenser flows into the high-temperature steam spray tank and the feed kettle through the inclined pipe with the open return valve to shape the wax. The condensed water in the condenser meets the requirements for shaping the polyethylene wax inside the feed kettle and will not exceed the horizontal level of the inclined connecting pipe. The drain valve on the bottom drain pipe is finally opened.

[0017] The linear stroke mechanism moves the sealing plate downward, and the dividing plate rises during the downward movement of the sealing plate. The whole process not only facilitates the dividing plate to cut the high-density polyethylene wax, but the sealing plate and the dividing plate can also cooperate to scrape off the wax flakes on the inner side of the kettle body II.

[0018] Compared with the prior art, when the flat-push polyethylene wax discharging tank is used, the polyethylene wax can be discharged quickly and simultaneously has the effect of condensation and shaping. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a partial system diagram of the present invention;

[0020] Figure 2 A perspective view of the high-temperature steam spray tank and condensing kettle of the present invention;

[0021] Figure 3 For the present invention Figure 2 A magnified view of point A;

[0022] Figure 4 This is a cross-sectional view of the high-temperature steam spray tank and the feed kettle in the present invention;

[0023] Figure 5 This is a diagram showing the internal structure of the feed kettle of the present invention;

[0024] Figure 6 For the present invention Figure 5 Enlarged view of point B;

[0025] Figure 7 It is a perspective view of the condensing kettle of the present invention;

[0026] Figure 8 A perspective view of a partition plate according to the present invention;

[0027] Figure 9 It is a three-dimensional diagram of the sealing bottom plate of the present invention. DETAILED DESCRIPTION

[0028] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention. Example

[0029] See also Figures 1-9 The present invention provides a technical solution: a high-density polyethylene wax separation system, comprising an air supply tank 6, a high-temperature steam spray tank 1, a high-temperature steam I end 11, a high-temperature steam II end 12, a feed kettle 2 and a condenser 3, wherein the air supply tank 6 is connected to the high-temperature steam spray tank 1 respectively, and is characterized in that: the feed kettle 2 is sheathed inside the high-temperature steam spray tank 1, the high-temperature steam spray tank 1 and the feed kettle 2 are sealed by a group of circular rings 13, a drain pipe 14 is provided on the circular ring 13 near the bottom of the feed kettle 2, and a A steam spray pipe 16 is provided, and the steam spray pipe 16 is evenly arranged on the high-temperature steam spray tank 1. A feed kettle 2 is sleeved inside the high-temperature steam spray tank 1, and a condenser kettle 3 is installed above the feed kettle 2. A group of steam pipes 17 are provided on the ring 13 near the top of the feed kettle 2. The steam pipes 17 are connected to the side of the condenser kettle 3. The steam pipes 17 and the feed kettle 2 are connected through an oblique connecting pipe 171. The bottom of the condenser kettle 3 is connected to the steam pipe 17 through an oblique pipe 21. A return liquid valve 22 is provided on the oblique pipe 21. The return liquid valve 22 is a one-way valve. A drain valve 15 is provided on the drain pipe 14.

[0030] In one embodiment, see Figure 7 The condensing kettle 3 includes a kettle body I 31, a finned radiator 32 and a frustum 33. The frustum 33 is arranged inside the kettle body I 31 and the bottom of the frustum 33 does not contact the kettle body I 31. The frustum 33 is fixedly connected to the top of the kettle body I 31. The finned radiator 32 is arranged on the frustum 33, and the kettle body I 31 is provided with a steam exhaust port 34.

[0031] In one embodiment, see Figures 5 to 7 The rated unit amount of wax-water mixture enters the feed kettle 2 through the feed spring tube 55, and the gas supply tank 6 evenly sprays the high-temperature hot steam between the feed kettle 2 and the high-temperature steam spray tank 1. The water vapor in the polyethylene wax water in the feed kettle 2 is sprayed to the condensation kettle 3 through the steam pipe 17 to condense into water. Part of the water vapor is discharged through the exhaust port 34 to separate the wax and water.

[0032] In one embodiment, see Figures 1 to 5The feeding kettle 2 includes a kettle body Ⅱ4 and a linear stroke mechanism 5. A sealing groove Ⅰ 41 is provided on the inner side of the kettle body Ⅱ4, a groove 42 is provided on the top of the kettle body Ⅱ4, a connecting rod 43 is provided inside the groove 42, a through hole 44 is provided on the kettle body Ⅱ4, and a sealing plate 45 is provided inside the kettle body Ⅱ4. The sealing plate 45 is above the oblique connecting pipe 171. The dividing plate 47 rises during the downward movement of the sealing plate 45, which not only facilitates the cutting of the high-density polyethylene wax by the dividing plate 47, but also enables the sealing plate 45 and the dividing plate 47 to cooperate to scrape off the wax sheet inside the kettle body Ⅱ4. A linear stroke mechanism 5 is installed on the top of the kettle body Ⅱ4. The linear stroke mechanism 5 is any one of an electric push rod, a pneumatic cylinder and an electric cylinder. The telescopic end of the linear stroke mechanism 5 passes through the through hole 44 and is connected and fixed to the sealing plate 45. The bottom of the sealing plate 45 A vertical rod 46 is provided, and a dividing plate 47 is sleeved on the vertical rod 46, and the dividing plate 47 slides on the vertical rod 46. A wire hole 48 is provided on the sealing plate 45, and the dividing plate 47 is a circular ring plate with a vertical and horizontal net 471. A connecting line 49 is provided on the top surface of the dividing plate 47, and the connecting line 49 passes through the wire hole 48 and is fixedly connected to the top surface of the sealing plate 45 through the upper end of the connecting rod 43. A sealing bottom plate 51 is provided at the bottom of the sealing plate 45, and a sealing ring 53 is fixedly provided on the side of the sealing bottom plate 51. The sealing ring 53 enters the sealing groove I 41 for sealing. A mixed material feed pipe 54 is also provided on the sealing plate 45, and the mixed material feed pipe 54 is connected to the feed spring tube 55. The feed spring tube 55 is connected and communicated with an external feed kettle (not shown in the figure). The dividing plate 47 is a circular ring plate with a vertical and horizontal net 471.

[0033] In one embodiment, see Figures 1 to 5 , wait until the water in the high-density polyethylene wax is completely evaporated, this process lasts for 30 minutes, and then the wax setting process is carried out. The gas supply tank 6 stops supplying gas, and the return valve 22 on the inclined tube 21 is opened. One of the return valves 22 is not opened, and the condensed water in the condensation kettle 3 is condensed into water. By opening the return valve 22 on the inclined tube 21, the condensed water flows between the high-temperature steam spray tank 1 and the feed kettle 2 for setting. The condensed water in the condensation kettle 3 meets the polyethylene wax setting inside the feed kettle 2 and will not exceed the horizontal level of the inclined connecting pipe 171. The drain valve 15 on the bottom drain pipe 14 is finally opened;

[0034] The linear stroke mechanism 5 moves downward to move the sealing plate 45, and the dividing plate 47 rises during the downward movement of the sealing plate 45. The whole process not only facilitates the cutting of the high-density polyethylene wax by the dividing plate 47, but the sealing plate 45 and the dividing plate 47 can also cooperate to scrape off the inner wax sheet of the kettle body II 4.

[0035] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A high-density polyethylene wax separation system, comprising an air supply tank, a high-temperature steam spray tank, a high-temperature steam terminal I, a high-temperature steam terminal II, a feed kettle, and a condenser, wherein the air supply tank is connected to the high-temperature steam spray tank, and is characterized in that: A feed kettle is installed inside the high-temperature steam spray tank, and the high-temperature steam spray tank and the feed kettle are sealed by a group of circular rings. A drain pipe is provided on the circular ring near the bottom of the feed kettle, and a steam spray pipe is provided between the high-temperature steam spray tank and the feed kettle. The steam spray pipes are evenly arranged on the high-temperature steam spray tank. The feed kettle is installed inside the high-temperature steam spray tank, and a condensing kettle is installed above the feed kettle. A group of steam pipes are provided on the circular ring near the top of the feed kettle. The steam pipe is connected to the side of the condensing kettle, and the steam pipe and the feed kettle are connected by an oblique connecting pipe. The bottom of the condensing kettle is connected to the steam pipe through an oblique pipe, and a liquid return valve is provided on the oblique pipe.

2. A high-density polyethylene wax separation system according to claim 1, characterized in that: The condensing kettle comprises a kettle body I, a finned radiator and a truncated table. The truncated table is arranged inside the kettle body I and the bottom of the truncated table is not in contact with the kettle body I. The finned radiator is arranged on the truncated table and the kettle body I is provided with a steam exhaust port.

3. The high-density polyethylene wax separation system according to claim 1, characterized in that: The feeding kettle includes a kettle body II and a linear stroke mechanism. A sealing groove I is arranged on the inner side of the kettle body II, a groove is arranged on the top of the kettle body II, a connecting rod is arranged inside the groove, a through hole is arranged on the kettle body II, a sealing plate is arranged inside the kettle body II, and the sealing plate is above the oblique connecting pipe. A linear stroke mechanism is installed on the top of the kettle body II, and the telescopic end of the linear stroke mechanism passes through the through hole and is connected and fixed to the sealing plate. A vertical rod is arranged at the bottom of the sealing plate, a dividing plate is sleeved on the vertical rod, and the dividing plate slides on the vertical rod. A wire hole is arranged on the sealing plate, and a connecting line is arranged on the top surface of the dividing plate. The connecting line passes through the wire hole and is fixedly connected to the top surface of the sealing plate through the upper end of the connecting rod. A sealing bottom plate is arranged at the bottom of the sealing plate, and a sealing ring is fixedly arranged on the side of the sealing bottom plate. A mixed material feeding pipe is also arranged on the sealing plate, and the mixed material feeding pipe is connected to the feeding spring tube.

4. The high-density polyethylene wax separation system according to claim 1, characterized in that: A drain valve is provided on the drain pipe.

5. A high-density polyethylene wax separation system according to claim 2, characterized in that: The linear travel mechanism is any one of an electric push rod, a pneumatic cylinder and an electric cylinder.

6. A high-density polyethylene wax separation system according to claim 3, characterized in that: The dividing plate is a circular plate with vertical and horizontal meshes.

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