CN2472811Y

CN2472811Y - Propylene polymerizing still

Info

Publication number: CN2472811Y
Application number: CN 01217805
Authority: CN
Inventors: 浦纪寿; 赖金亮
Original assignee: LIMA CHEMIAL MACHINERY CO Ltd WUXI
Current assignee: LIMA CHEMIAL MACHINERY CO Ltd WUXI
Priority date: 2001-03-07
Filing date: 2001-03-07
Publication date: 2002-01-23
Anticipated expiration: 2011-03-07

Abstract

The utility model relates to a propylene polymerizing kettle, in particular to a propylene polymerizing kettle with a double helical ribbon agitator. The main technical proposal is that a barrel-shaped jacket has an inner barrel body inside. The upper and lower ends of the inner barrel are the upper end cover and the end cover of the kettle bottom respectively, and a speed reducer is fixedly connected above the upper end cover. The main shaft of the speed reducer is connected with an agitating shaft connected with a helical ribbon blade. In addition, a feeding opening is arranged at the upper end cover, while a discharging opening is arranged at the end cover of the kettle bottom. The characteristics are that the helical ribbon blade is a double helical ribbon blade, and the two helical ribbon blades make the agitating shaft as the symmetric center and connect to clamps in a helical shape symmetrically and uniformly. The utility model has the advantages of reasonable structure and high efficiency.

Description

The propylene polymerization still

The utility model relates to a kind of propylene polymerization still, refers in particular to the propylene polymerization still of a kind of pair of ribbon agitating device.

The propylene polymerization still is mainly used in the polymerisation of material to produce polypropylene.In the prior art, the propylene polymerization still is single ribbon stirring structure, and because of the asymmetry of this structure, the radially uneven horizontal thrust of generation makes the amount of radially wobbling of shaft big, influences the gland sealed life-span; And folder shell crossbeam is the uiform section structure, and it is big to stir resistance; In addition, it is little that existing single ribbon bottom blade stirs scope, and insufficient, and catalyst deposit easily produces sudden and violent gathering at the bottom of still, cause the material caking, influences product quality.

The purpose of this utility model provides a kind of propylene polymerization still, it is compared with the propylene polymerization still of single ribbon agitating device, do not improving under the prerequisite that stirs consumed power, stirring to material is more abundant, the amount of radially wobbling of shaft is littler, and the bottom blade simple shape is convenient to processing and fabricating, solves the sudden and violent coalescent problem of material.

Its main technical schemes is in barrel-shaped chuck inner barrel to be arranged, on the inner barrel, the lower end is respectively upper cover and still bottom (head), on upper cover, be fastenedly connected reductor, the main shaft of reductor passes upper cover at the center of upper cover and enters inner barrel, and utilize clamping coupling to connect shaft, on shaft, utilize the folder shell to connect the ribbon blade, charge door is set on upper cover, on the still bottom (head), drain hole is set, it is characterized in that the ribbon blade is two ribbon blades, two ribbon blades are symmetrical centre with the shaft, symmetry and be connected in one by one with helical form equably and press from both sides on the shell.

The folder shell is a kind of variable section structure that meets the equal strength principle, its cross section increases to interior gradually from the outer end, utilize the folder shell to be connected two foundation blades symmetrically with end folder shell in the lower end of shaft, one end of every foundation blade is positioned on the end folder shell at middle part, the other end is positioned at the outer end of folder shell, spirals up with band shape in the middle of it.

The flow deflector that inner barrel outer wall setting between chuck and inner barrel is spiraled and risen with helical form, and set out respectively at the upper/lower terminal of chuck, water inlet pipe; The circumferential uniform dactylethrae that is axial placement in edge in inner barrel, every dactylethrae is made up of inner and outer pipe, the lower ending opening of interior pipe, and extend bottom the outer tube, the upper end of interior pipe is connected with the water inlet that is installed on inner barrel top, the sealing of the upper/lower terminal of outer tube, the top of outer tube is connected with delivery port on being installed on inner barrel.

Bottom center at the still bottom (head) is provided with lower flange, forms drain hole in lower flange, connects little scraper in the lower end of shaft, and this little scraper extends in the drain hole; On upper cover, be provided for installing the manhole of maintenance usefulness, on inner barrel, be provided for measuring the temperature-measuring port of temperature in the kettle, upper flange and packing seal are set at the connecting portion of main shaft and upper cover.

The utility model has the advantages that owing to adopt two ribbon blades, its symmetrical configuration, eliminated radially uneven horizontal thrust, make the balance of shaft good, thereby reduced the amount of radially wobbling of shaft, prolong the gland sealed life-span, optimized the helical angle that has strengthened two ribbon blades, more abundant, more even to the stirring of material; Adopt the equal strength theory that the structure of folder shell is carried out the variable cross-section optimal design, greatly reduce the resistance of folder shell to material, the stirring consumed power is compared with the propylene polymerization still of single ribbon agitating device not to be increased; Because bottom blade has lead angle, during stirring material there is lifting force upwards, planform after the optimization, it is simple and convenient that bottom blade is made, and the shape of end folder shell and the shape of still bottom (head) match, make the material at the bottom of the still can both obtain stirring, utilize the compound action of the bottom blade and end folder shell, make material and catalyst upwards turn over and make and stir, no dead angle, guarantee that material does not produce sudden and violent coalescent, improves the quality of products effectively.

Fig. 1 is a structure chart of the present utility model.

Fig. 2 is two ribbon blades and bottom blade schematic top plan view.

Fig. 3 is that the A of Fig. 1 is to figure.

Fig. 4 is original propylene polymerization still structure chart.

Fig. 5 is original single ribbon blade and single ribbon bottom blade schematic top plan view.

As shown in Figure 1:

Inner barrel 7 is arranged in barrel-shaped chuck 8, on the inner barrel 7, the lower end is respectively upper cover 5 and still bottom (head) 10, on upper cover 5, be fastenedly connected reductor 1, the main shaft 2 of reductor 1 passes upper cover 5 at the center of upper cover 5 and enters inner barrel 7, and utilize clamping coupling 6 to connect shaft 13, charge door 27 is set on upper cover 5, lower flange (23) is set on still bottom (head) 10, on shaft 13, utilize the folder shell of evenly arranging one by one 14 to connect two ribbon blades 15, constitute two ribbon blades, two ribbon blades are symmetrical centre with shaft 13, symmetry and be connected in helical form equably and press from both sides one by one on the shell 14.

Folder shell 14 is a kind of variable section structures that meet the equal strength principle, its cross section increases to interior gradually from the outer end, this structure is under the prerequisite that guarantees folder shell intensity, can reduce the cross section of folder shell as much as possible, thereby reduce folder shell resistance in the running, utilize folder shell 14 to be connected two foundation blades 12 symmetrically with end folder shell 11 in the lower end of shaft 13, one end of every foundation blade 12 is positioned on the end folder shell 11 at middle part, the other end is positioned at the outer end of nethermost that root folder shell 14, and the centre of bottom blade spirals up with band shape.

The flow deflector 24 that spirals and rise with helical form in the inner barrel 7 outer wall settings of 7 of chuck 8 and inner barrels, and set out respectively at the upper/lower terminal of chuck 8,

water inlet pipe

16,20, hot water or cold water are entered from import, behind flow deflector, discharge, so that raise or the reduction temperature in the kettle from outlet pipe.

The circumferential uniform dactylethrae 9 that is axial placement in edge in inner barrel 7, every dactylethrae 9 is made up of inner and outer pipe, the lower ending opening of interior pipe, and extending the outer tube bottom, the upper end of interior pipe is connected with the water inlet 26 that is installed on inner barrel 7 tops, the upper/lower terminal sealing of outer tube, the top of outer tube is connected with delivery port 25 on being installed on inner barrel 7, cold water is fed from import, through between inner/outer tube, discharge again, so that reduce temperature in the kettle to exporting.

Bottom center at still bottom (head) 10 is provided with lower flange 23, forms drain hole 22 in lower flange 23, connects little scraper 21 in the lower end of shaft 13, and this little scraper 21 extends in the drain hole 22, and little scraper rotates with shaft, and is not blocked to guarantee drain hole 22.

On upper cover 5, be provided for installing the manhole 17 of maintenance usefulness, on inner barrel 7, be provided for measuring the temperature-measuring port 19 of temperature in the kettle, at the connecting portion of main shaft 2 and upper cover 5 upper flange 4 and packing seal 3 are set, to guarantee its sealing property.

Among Fig. 1 18 is support, and 28 among Fig. 4 is folder shell at the bottom of single ribbon, and 29 be single ribbon bottom blade, and 30 is that single ribbon presss from both sides shell, and 31 is single ribbon blade.

Claims

1, the propylene polymerization still, inner barrel (7) is arranged in barrel-shaped chuck (8), on the inner barrel (7), the lower end is respectively upper cover (5) and still bottom (head) (10), on upper cover (5), be fastenedly connected reductor (1), the main shaft (2) of reductor (1) passes upper cover (5) at the center of upper cover (5) and enters inner barrel (7), and utilize clamping coupling (6) to connect shaft (13), go up utilization folder shell (14) at shaft (13) and connect ribbon blade (15), charge door (27) is set on upper cover (5), lower flange (23) is set on still bottom (head) (10), it is characterized in that the ribbon blade is two ribbon blades, two ribbon blades are symmetrical centre with shaft (13), symmetry and be connected in helical form equably and press from both sides one by one on the shell (14).

2, propylene polymerization still according to claim 1, it is characterized in that pressing from both sides shell (14) is a kind of variable section structure that meets the equal strength principle, its cross section increases to interior gradually from the outer end.

3, propylene polymerization still according to claim 1, it is characterized in that utilizing folder shell (14) to be connected two foundation blades (12) symmetrically with end folder shell (11) in the lower end of shaft (13), one end of every foundation blade (12) is positioned on the end folder shell (11) at middle part, the other end is positioned at the outer end of folder shell (14), spirals up with band shape in the middle of it.

4, propylene polymerization still according to claim 1, it is characterized in that the flow deflector (24) that inner barrel (7) the outer wall setting between chuck (8) and inner barrel (7) is spiraled and risen with helical form, and set out respectively at the upper/lower terminal of chuck (8), water inlet pipe (16), (20).

5, propylene polymerization still according to claim 1, it is characterized in that in inner barrel (7) along the circumferential uniform dactylethrae (9) that is axial placement, every dactylethrae (9) is made up of inner and outer pipe, the lower ending opening of interior pipe, and extend bottom the outer tube, the upper end of interior pipe is connected with the water inlet (26) that is installed on inner barrel (7) top, the sealing of the upper/lower terminal of outer tube, and the top of outer tube is connected with delivery port (25) on being installed on inner barrel (7).

6, propylene polymerization still according to claim 1, it is characterized in that lower flange (23) being set in the bottom center of still bottom (head) (10), in lower flange (23), form drain hole (22), connect little scraper (21) in the lower end of shaft (13), this little scraper (21) extends in the drain hole (22).

7, propylene polymerization still according to claim 1, it is characterized in that on upper cover (5), being provided for installing the manhole (17) of maintenance usefulness, on inner barrel (7), be provided for measuring the temperature-measuring port (19) of temperature in the kettle, upper flange (4) and packing seal (3) be set at the connecting portion of main shaft (2) and upper cover (5).