CN210752692U - High-efficient polymeric kettle is used in polypropylene production - Google Patents
High-efficient polymeric kettle is used in polypropylene production Download PDFInfo
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- CN210752692U CN210752692U CN201921420570.0U CN201921420570U CN210752692U CN 210752692 U CN210752692 U CN 210752692U CN 201921420570 U CN201921420570 U CN 201921420570U CN 210752692 U CN210752692 U CN 210752692U
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Abstract
The utility model discloses a high-efficiency polymerization kettle for polypropylene production, which comprises a kettle body barrel, wherein a heat exchange tube is arranged in the inner cavity of the kettle body barrel, and the heat exchange tube consists of an upper heat exchange tube, a middle heat exchange tube and a lower heat exchange tube; the upper heat exchange tube and the lower heat exchange tube are respectively of a semicircular bent tube structure, two end parts of the upper heat exchange tube are respectively communicated with the upper end part of the middle heat exchange tube, and the lower end part of the middle heat exchange tube is respectively communicated with two end parts of the lower heat exchange tube; a stirring shaft is arranged in an inner cavity of the kettle body barrel, the lower end part of the stirring shaft is fixed through a bearing seat, the bearing seat is fixed on the upper surface of a mounting plate through a bolt, the mounting plate is of a disc structure, three support rods which are uniformly distributed in the circumferential direction are fixed on the periphery of the mounting plate, the support rods are obliquely arranged, and the lower end parts of the support rods are welded and fixed on the inner surface of the lower elliptical sealing head; the polymerization kettle provided by the utility model can improve the heat transfer performance of the polymerization kettle, so that the materials are uniformly mixed; ensure the quality and the production efficiency of the product.
Description
Technical Field
The utility model relates to a high-efficient polymeric kettle is used in polypropylene production belongs to polypropylene production facility technical field.
Background
Polypropylene is a high molecular weight polymer formed by polymerizing propylene monomers. As a high molecular plastic, the high molecular plastic plays an important role in modern industrial production and is one of five general synthetic resins. The polypropylene has excellent performance and wide application, and the yield in China is increased rapidly in recent years, so that the polypropylene is one of plastic varieties with the fastest production and development speed.
The production process of polypropylene generally comprises four main parts of propylene refining, polymerization, flash evaporation and propylene recovery, wherein the propylene refining comprises the process steps of propylene drying, propylene desulfurization, propylene deoxidation, propylene dearsenification and the like; the polymerization is completed in a polymerization kettle, a catalyst, an activator and the like are required to be added, the reaction is carried out for 1.5 to 2.5 hours under the conditions of 3.2 to 3.8MPa and 70 to 78 ℃, the stirring is continuously carried out in the reaction process, and finally the material is close to a dry pot; flashing is the removal of volatile substances from the polypropylene powder and the reduction of the temperature of the polypropylene powder under sudden pressure reduction. The principle of propylene recovery is to compress gas phase propylene to 2.0MPa, cool it to below 32 ℃ and change it into liquid phase propylene, at this temperature, nitrogen can not be liquefied, and liquid phase propylene can be obtained after gas-liquid separation.
The polymerization kettle in the prior art has the defects in the use process, for example, the polymerization kettle has poor heat transfer and uneven material mixing, so that the open loop of the temperature control of the polymerization kettle is unstable, the temperature control becomes very difficult, and the production efficiency of the product is further influenced; in addition, the length of a stirring shaft of the polymerization kettle is generally longer, and the stirring shaft can deflect in the using process, so that the reliability of a shaft seal can be directly influenced, and further the quality of a product, the production efficiency and the running stability of a device are influenced; the prior art obviously has inconvenience and defects in practical use, so that improvement is needed.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem of providing a high-efficiency polymerization kettle for polypropylene production, which can improve the heat transfer performance of the polymerization kettle; the materials can be fully and uniformly mixed; the reliability of the shaft seal is ensured, and the quality of the product is ensured; the production efficiency of the product is improved.
For solving the technical problem, the utility model discloses a following technical scheme:
a high-efficiency polymerization kettle for polypropylene production comprises a kettle body cylinder, wherein a heat exchange tube is arranged in an inner cavity of the kettle body cylinder, and the heat exchange tube consists of an upper heat exchange tube, a middle heat exchange tube and a lower heat exchange tube; the upper heat exchange tube and the lower heat exchange tube are respectively of a semicircular bent tube structure, two end parts of the upper heat exchange tube are respectively communicated with the upper end part of the middle heat exchange tube, and the lower end part of the middle heat exchange tube is respectively communicated with two end parts of the lower heat exchange tube; a horizontally arranged heat exchange tube cooling water inlet is arranged at the middle position of the upper heat exchange tube, and a horizontally arranged heat exchange tube cooling water outlet is arranged at the middle position of the lower heat exchange tube; a stirring shaft is arranged in the inner cavity of the kettle body cylinder, the lower end part of the stirring shaft is fixed through a bearing seat, and the bearing seat is fixed on the upper surface of the mounting plate through a bolt; the mounting plate is of a disc structure, and three support rods which are uniformly distributed in the circumferential direction are fixed around the mounting plate; the support rod is obliquely arranged, and the lower end part of the support rod is welded and fixed on the inner surface of the lower elliptical seal head.
Furthermore, the upper heat exchange tube and the lower heat exchange tube are both horizontally arranged; the middle heat exchange tubes are vertically arranged, and the number of the middle heat exchange tubes is two.
Furthermore, a spiral stirring blade and a scraping plate are installed on the main body of the stirring shaft, the scraping plate is located below the spiral stirring blade, and the shape of the scraping plate is matched with the shape of the inner surface of the lower elliptical sealing head.
Furthermore, an upper elliptical head is installed at the upper end of the kettle body cylinder, a lower elliptical head is installed at the lower end of the kettle body cylinder, and a propylene catalyst inlet, a propylene activator inlet, a nitrogen inlet, a vent and a standby port are installed on the upper elliptical head.
Further, the outside cover of cauldron body barrel and lower oval head is equipped with and presss from both sides the cover barrel, presss from both sides the inside clamp chamber that forms of cover barrel, presss from both sides the intracavity and is equipped with spiral guide plate.
Furthermore, a solid-phase temperature measuring port is arranged on the wall of the kettle body barrel.
The utility model adopts the above technical scheme after, compare with prior art, have following advantage:
the utility model provides a high-efficient polymeric kettle is used in polypropylene production, polypropylene carries out the polymerization reaction in the cauldron, and the material in the cauldron carries out heat transfer simultaneously through pressing from both sides chamber and heat exchange tube, can improve polymeric kettle's heat transfer nature, is favorable to the temperature equilibrium of material; the heat exchange tube provided by the utility model can not only have the function of heat transfer, but also have the function of disturbing the vortex in the kettle in the stirring process, so that the materials can be fully stirred and uniformly mixed; the rotation process of the stirring shaft is stable, and the stirring shaft does not deflect, so that the reliability of the shaft seal is maintained, and the quality, the production efficiency and the stability of the operation of the device of the stirring shaft are ensured; the temperature control of the polymerization kettle is stable in ring opening, and the production efficiency of products can be further improved.
The present invention will be described in detail with reference to the accompanying drawings and examples.
Drawings
Fig. 1 is a schematic structural diagram of the present invention;
FIG. 2 is a schematic structural view of a heat exchange tube of the present invention;
FIG. 3 is a schematic structural view of the mounting plate and the support rod of the present invention;
in the figure, the position of the upper end of the main shaft,
1-kettle body cylinder, 101-upper elliptical head, 102-lower elliptical head, 2-jacket cylinder, 3-spiral guide plate, 4-clamping cavity cooling water inlet, 5-clamping cavity cooling water outlet, 6-solid phase temperature measuring port, 7-lug seat, 8-upper heat exchange tube, 9-middle heat exchange tube, 10-lower heat exchange tube, 11-heat exchange tube cooling water inlet, 12-heat exchange tube cooling water outlet, 13-stirring shaft, 14-bearing seat, 15-mounting plate, 16-support rod, 17-spiral stirring blade, 18-scraping plate and 19-material outlet.
Detailed Description
In order to clearly understand the technical features, objects, and effects of the present invention, embodiments of the present invention will be described with reference to the accompanying drawings.
Example 1 high-efficient polymeric kettle is used in polypropylene production
As shown in fig. 1, 2 and 3, the utility model provides a high-efficiency polymerizer for polypropylene production, which comprises a kettle body barrel 1, wherein an upper elliptical head 101 is fixed at the upper end of the kettle body barrel 1 by welding, a lower elliptical head 102 is fixed at the lower end of the kettle body barrel 1 by welding, a propylene catalyst inlet, a propylene activator inlet, a nitrogen inlet, a vent and a standby port are arranged on the upper elliptical head 101, and a material outlet 19 is arranged at the middle position of the lower elliptical head 102; the kettle body barrel 1 and the outer part of the lower elliptical seal head 102 are sleeved with a jacket barrel 2, a clamping cavity is formed between the inner surface of the jacket barrel 2 and the outer surfaces of the kettle body barrel 1 and the lower elliptical seal head 102, a spiral guide plate 3 is arranged in the clamping cavity, the spiral guide plate 3 is arranged on the outer barrel walls of the kettle body barrel 1 and the lower elliptical seal head 102, a clamping cavity cooling water inlet 4 is formed in the bottom of the clamping cavity, and a clamping cavity cooling water outlet 5 is formed in the top of the clamping cavity; the wall of the kettle body barrel 1 is provided with a solid phase temperature measuring port 6; the wall of the jacket barrel body 2 is provided with two symmetrically arranged ear seats 7.
A heat exchange tube is arranged in the inner cavity of the kettle body cylinder 1 and consists of an upper heat exchange tube 8, a middle heat exchange tube 9 and a lower heat exchange tube 10; the upper heat exchange tube 8 and the lower heat exchange tube 10 are respectively of a semicircular bent tube structure, the upper heat exchange tube and the lower heat exchange tube are both horizontally arranged, and two end parts of the upper heat exchange tube 8 are respectively communicated with the upper end part of the middle heat exchange tube 9; the middle heat exchange tubes 9 are vertically arranged, the number of the middle heat exchange tubes is two, and the lower end parts of the middle heat exchange tubes 9 are respectively communicated with the two end parts of the lower heat exchange tube 10; a horizontally arranged heat exchange tube cooling water inlet 11 is arranged in the middle of the upper heat exchange tube 8; a horizontally arranged heat exchange tube cooling water outlet 12 is arranged in the middle of the lower heat exchange tube 10; the middle heat exchange tube 9 not only can play a heat exchange function, but also can play a role in disturbing vortex in the kettle in the stirring process, so that the materials can be fully stirred.
A vertically arranged stirring shaft 13 is arranged in the inner cavity of the kettle body cylinder 1, the stirring shaft 13 is driven by a driving device above the kettle body cylinder 1, and the lower end part of the stirring shaft 13 is radially fixed through a bearing seat 14, so that the stirring shaft 13 is prevented from deflecting in the use process and the reliability of a shaft seal is prevented from being influenced; the bearing seat 14 is fixed on the upper surface of the mounting plate 15 through a bolt, the mounting plate 15 is of a disc structure, three support rods 16 which are uniformly distributed circumferentially are fixed around the mounting plate 15, the support rods 16 are obliquely arranged, and the lower end parts of the support rods 16 are welded and fixed on the inner surface of the lower elliptical head 102; a spiral stirring blade 17 and a scraper 18 are arranged on the main body of the stirring shaft 13, the scraper 18 is positioned below the spiral stirring blade 17, the shape of the scraper 18 is adapted to the shape of the inner surface of the lower elliptical head 102, the scraper 18 can prevent materials from caking at the bottom of the kettle, and once the materials are caking, not only heat exchange but also continuous polymerization reaction is influenced; the spiral stirring blade 17 has the advantage that the materials are stirred in a rolling manner up and down, so that the stirring is more uniform and sufficient.
The utility model discloses a concrete theory of operation:
when polypropylene is polymerized in a kettle, materials in the kettle are subjected to heat transfer simultaneously through the clamping cavity and the heat exchange tube, cooling water enters the clamping cavity from the clamping cavity cooling water inlet 4 during heat transfer, the cooling water is output from the clamping cavity cooling water outlet to take away heat generated by the polymerization reaction, the cooling water sequentially enters the upper heat exchange tube 8, the middle heat exchange tube 9 and the lower heat exchange tube 10 from the heat exchange tube cooling water inlet 11 during heat transfer, and is finally output from the heat exchange tube cooling water outlet 12, the clamping cavity and the heat exchange tube perform heat transfer simultaneously, the temperature balance of the materials is facilitated, and the middle heat exchange tube 9 can also play a role in disturbing vortex in the kettle during stirring so that the materials can be stirred sufficiently; when the material is carrying out polymerization reaction, (mixing) shaft 13 is in operating condition always, (mixing) shaft 13 is at the bearing frame 14, mounting panel 15 and bracing piece 16's fixed action is steady to be rotated, the skew can not take place for the rotation process, be favorable to maintaining the reliability of bearing seal, (mixing) shaft 13 rotates the process and drives spiral stirring vane 17 and scraper blade 18 and rotate, spiral stirring vane 17 can make the material stir of rolling from top to bottom, it is more even abundant to make the stirring, scraper blade 18 can prevent that the material from caking at the bottom of the cauldron, influence going on of heat transfer and polymerization reaction continuously.
The foregoing is illustrative of the best mode of the invention, and details not described herein are within the common general knowledge of a person of ordinary skill in the art. The protection scope of the present invention is subject to the content of the claims, and any equivalent transformation based on the technical teaching of the present invention is also within the protection scope of the present invention.
Claims (6)
1. The utility model provides a polypropylene production is with high-efficient polymeric kettle which characterized in that: the kettle comprises a kettle body cylinder (1), wherein a heat exchange tube is arranged in an inner cavity of the kettle body cylinder (1), and the heat exchange tube consists of an upper heat exchange tube (8), a middle heat exchange tube (9) and a lower heat exchange tube (10); the upper heat exchange tube (8) and the lower heat exchange tube (10) are respectively of a semicircular bent tube structure, two end parts of the upper heat exchange tube (8) are respectively communicated with the upper end part of the middle heat exchange tube (9), and the lower end part of the middle heat exchange tube (9) is respectively communicated with two end parts of the lower heat exchange tube (10); a horizontally arranged heat exchange tube cooling water inlet (11) is arranged at the middle position of the upper heat exchange tube (8), and a horizontally arranged heat exchange tube cooling water outlet (12) is arranged at the middle position of the lower heat exchange tube (10); a stirring shaft (13) is arranged in an inner cavity of the kettle body cylinder (1), the lower end part of the stirring shaft (13) is fixed through a bearing seat (14), and the bearing seat (14) is fixed on the upper surface of the mounting plate (15) through a bolt; the mounting plate (15) is of a disc structure, and three support rods (16) which are uniformly distributed in the circumferential direction are fixed around the mounting plate (15); the support rod (16) is obliquely arranged, and the lower end part of the support rod (16) is welded and fixed on the inner surface of the lower elliptical seal head (102).
2. The efficient polymerizer for producing polypropylene according to claim 1, wherein: the upper heat exchange tube (8) and the lower heat exchange tube (10) are both horizontally arranged; the middle heat exchange tubes (9) are vertically arranged, and the number of the middle heat exchange tubes is two.
3. The efficient polymerizer for producing polypropylene according to claim 1, wherein: a spiral stirring blade (17) and a scraper (18) are installed on the main body of the stirring shaft (13), the scraper (18) is located below the spiral stirring blade (17), and the shape of the scraper (18) is matched with the shape of the inner surface of the lower elliptical sealing head (102).
4. The efficient polymerizer for producing polypropylene according to claim 3, wherein: an upper elliptical sealing head (101) is installed at the upper end of the kettle body cylinder (1), a lower elliptical sealing head (102) is installed at the lower end of the kettle body cylinder, and a propylene catalyst inlet, a propylene activator inlet, a nitrogen inlet, a vent and a standby port are installed on the upper elliptical sealing head (101).
5. The efficient polymerizer for producing polypropylene according to claim 1, wherein: the outer sleeves of the kettle body cylinder (1) and the lower elliptical seal head (102) are provided with a jacket cylinder (2), a clamping cavity is formed inside the jacket cylinder (2), and a spiral guide plate (3) is arranged in the clamping cavity.
6. The efficient polymerizer for producing polypropylene according to claim 1, wherein: the wall of the kettle body cylinder (1) is provided with a solid phase temperature measuring port (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921420570.0U CN210752692U (en) | 2019-08-29 | 2019-08-29 | High-efficient polymeric kettle is used in polypropylene production |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921420570.0U CN210752692U (en) | 2019-08-29 | 2019-08-29 | High-efficient polymeric kettle is used in polypropylene production |
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| Publication Number | Publication Date |
|---|---|
| CN210752692U true CN210752692U (en) | 2020-06-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921420570.0U Active CN210752692U (en) | 2019-08-29 | 2019-08-29 | High-efficient polymeric kettle is used in polypropylene production |
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| Country | Link |
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| CN (1) | CN210752692U (en) |
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- 2019-08-29 CN CN201921420570.0U patent/CN210752692U/en active Active
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| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20221019 Address after: 262700 North Park West Street and West Wenchang Road, Wenjia Street, Shouguang City, Weifang City, Shandong Province Patentee after: Shandong Shanyu Packaging Co.,Ltd. Address before: 262700 West of Xinhua West Road and North of Xinsha Road, Houzhen Industrial Park, Shouguang City, Weifang City, Shandong Province Patentee before: Shandong Shouguang Jianyuanchun Chemical Co.,Ltd. Patentee before: WEIFANG University OF SCIENCE & TECHNOLOGY |
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| TR01 | Transfer of patent right |