CN102151537A

CN102151537A - Raw rubber polymerization reaction device

Info

Publication number: CN102151537A
Application number: CN2011100345681A
Authority: CN
Inventors: 张国年; 陈拉克
Original assignee: LIYANG LIDA SILICONE TECHNOLOGY Co Ltd
Current assignee: LIYANG LIDA SILICONE TECHNOLOGY Co Ltd
Priority date: 2011-02-08
Filing date: 2011-02-08
Publication date: 2011-08-17
Anticipated expiration: 2031-02-08
Also published as: CN102151537B

Abstract

The invention relates to a raw rubber polymerization device which comprises a reaction kettle, a stirring mechanism and a feeding protection device, wherein the reaction kettle comprises a kettle body, a vacuum pumping connector, a filling connector, a discharge valve and a clamping sleeve plate; the clamping sleeve plate and the kettle body together form a clamping sleeve; the stirring mechanism comprises a variable frequency motor, a decelerator, a stirring shaft, a stirring paddle, a fixed bracket and a limit bearing; the variable frequency motor and the decelerator are located at the central position of the top of the kettle body; the fixed bracket is fixed in the kettle body of the reaction kettle; the limit bearing is arranged on the fixed bracket; both the stirring shaft and the stirring paddle are located in the inner cavity of the kettle body of the reaction kettle; the lower end of the stirring shaft extends into an inner ring of the limit bearing; the stirring paddle is fixed on the stirring shaft; and the feeding protection device comprises a feeding hopper, a first valve, a container, a feeding vacuum pumping connector, a discharge pipe and a second valve. The reaction device is even in the distribution of material molecular weight and vinyl therein, less in absorption of trace water and high in production efficiency.

Description

The rubber polymerizing reactor

Technical field

The present invention relates to a kind of reaction unit, especially a kind of device that carries out polymerisation for the preparation raw-silastic continuously.

Background technology

Silicon rubber has excellent electric insulating, oxytolerant ageing resistance, fast light ageing resistance and mildew resistance, chemical stability etc., and it is tasteless nontoxic, can be high temperature resistant and low temperature resistant, be widely used in macromolecule industrial circle fields such as rubber, plastics, coating, adhesive, fluid sealant, and in medical domain, also play an important role.

In the preparation process of silicon rubber, with dimethyl ring body siloxanes is primary raw material, and adding accounts for dimethyl ring body siloxanes one thousandth to thousand/four methyl ethylene Fourth Ring body, dimethyl ring body siloxanes is under the effect of catalyst, the open chain polymerisation takes place and generate macromolecule line style dimethyl polysiloxane, the open chain polymerisation also takes place and generates macromolecule line style methylvinyl-polysiloxane in methyl ethylene Fourth Ring body simultaneously, thereby obtains methyl vinyl silicon kautschuk.Common polymerizing reactor capacity is less, and normally 300 to 500 liters, yield poorly, efficient is low, and the molecular weight distribution of the rubber of being produced is inhomogeneous.Common polymerizing reactor adopts the steam pipe coil heating, temperature can change along with the variation of steam pressure, rely on fast and the frequent adjustment valve is controlled temperature, the temperature fluctuation instability, the low then reaction of temperature not even reaction slowly, temperature height then catalyst can lose activity, and is bigger to the polymerisation influence.In addition, the mode that common polymerizing reactor adopts open type to feed intake, in reactor, add catalyst in polymerization stage by dog-house, molecular weight regulator, raw materials such as contents of ethylene controlling agent, because reactor is a vacuum, be easy to when adding auxiliary agent, suck a large amount of air and airborne moisture, very responsive to moisture when generating the polymerisation of raw-silastic continuously, because can changing into hydroxyl, the existence of water carries out end-blocking, thereby make that the molecular weight of rubber is less, and in the rubber if to have many end of the chains be the polymer molecule of hydroxyl, can cause the difficulty of mixing that adds man-hour and reinforced filling mixing, the storage time of the elastomeric compound in road shortens after also can making, finally causes the mechanical performance of silastic product to descend.

Summary of the invention

The purpose of this invention is to provide a kind of material molecular weight, vinyl is evenly distributed, minor amount of water sucks few, and the high rubber polymerizing reactor of production efficiency.

The technical scheme that realizes the object of the invention is that a kind of rubber polymerizing reactor comprises reactor, rabbling mechanism and the protective device that feeds intake;

Reactor comprises kettle, vacuumizes mouthpiece, dnockout mouthpiece, bleeder valve and chuck plate; Chuck plate and kettle constitute chuck jointly; Vacuumize mouthpiece and dnockout mouthpiece and all be arranged on the top of kettle; Bleeder valve is fixedly connected on the discharging opening of autoclave body bottom central position from the below;

Rabbling mechanism comprises variable-frequency motor, reductor, shaft, stirrer paddle, fixed support and Limit Bearing; The motor shaft of variable-frequency motor also is the power input shaft of reductor, and reductor is fixedly connected on the kettle of reactor by its base, and is positioned at the center of top position of kettle; Fixed support is fixed in the kettle of reactor, and is positioned at the central position of the bottom of kettle; Limit Bearing is installed on the fixed support, and is positioned at support bracket fastened top; Shaft and stirrer paddle all are arranged in the kettle inner chamber of reactor, the upper end of shaft links to each other with the lower end that stretches into the power output shaft in the kettle downwards of reductor by shaft coupling, the lower end of shaft is stretched in the inner ring of Limit Bearing, and with the inner ring tight fit of Limit Bearing; Stirrer paddle is fixed on the shaft;

The protective device that feeds intake comprises feed hopper, first valve, container, feeding intake vacuumizes mouthpiece, discharge nozzle and second valve; Feed hopper is linked to each other with the charging aperture of container by the discharging opening that it is positioned at the lower end, and is positioned at the top at the top of container; First valve is arranged on the bottom of feed hopper; Feed intake and vacuumize the side that mouthpiece is arranged on the top of container; The discharging opening that is positioned at the bottom of the upper end of discharge nozzle and container links to each other, and the lower end of discharge nozzle is fixed on the top of the kettle of reactor, and with the intracavity inter-connection of kettle; Second valve is arranged on the discharge nozzle.

The chuck of aforesaid reaction vessel is enclosed on the lateral outer of kettle by the chuck plate, and is fixedly connected on the outer wall of kettle by the plate end of the inside bending of its upper and lower side, thereby forms an air blanketing and constitute between kettle and chuck plate; The bottom, side of chuck is provided with the hot oil inlet pipe, and the top, side of chuck is provided with the hot oil outlet pipe.

The present invention has positive effect:

(1) motor of the rabbling mechanism of rubber polymerizing reactor of the present invention adopts VFC, can stir the soft solid materials about 2 tons, has improved production capacity greatly, can improve molecular weight and vinyl situation pockety, and is safe and reliable, and energy savings.

(2) rubber polymerizing reactor of the present invention adopts the protective device that feeds intake by vacuumizing the method for removing air, has effectively avoided sucking airborne moisture when adding auxiliary agent, has guaranteed the quality of rubber.

(3) rubber polymerizing reactor of the present invention adopts the logical deep fat heating of jacket type, and uniform and stable compared with the steam pipe coil heating-up temperature, firing rate is fast, is easy to control.

Description of drawings

Fig. 1 is a kind of structural representation of rubber polymerizing reactor of the present invention.

Fig. 2 is the structural representation of the protective device that feeds intake of the rubber polymerizing reactor among Fig. 1.

The title of the technical characterictic that the mark of above-mentioned accompanying drawing is represented is as follows:

Reactor 1, kettle 11 vacuumizes mouthpiece 12, dnockout mouthpiece 13, bleeder valve 14, chuck 15, hot oil inlet pipe 15-1, hot oil outlet pipe 15-2, chuck plate 16,

Rabbling mechanism 2, variable-frequency motor 21, reductor 22, shaft 23, stirrer paddle 24, fixed support 25, Limit Bearing 26,

The protective device 3 that feeds intake, feed hopper 31, the first valves 32, container 33, feeding intake vacuumizes mouthpiece 34, discharge nozzle 35, the second valves 36.

The specific embodiment

(embodiment 1)

See Fig. 1, the rubber polymerizing reactor of present embodiment comprises reactor 1, rabbling mechanism 2 and the protective device 3 that feeds intake.

Reactor 1 comprises kettle 11, vacuumizes mouthpiece 12, dnockout mouthpiece 13, bleeder valve 14 and chuck plate 16.Chuck plate 16 and kettle 11 common formation chucks 15.The integral piece that kettle 11 is made through the punching press welding for steel plate, central part on the plate body at the top of kettle 11 has the central circular hole that is used for by the power output shaft of rabbling mechanism, also has near be positioned at the central installing hole first circular hole as vacuum orifice on the plate body at the top of kettle 11, as second circular hole of liquid material mouth and as the 3rd circular hole of auxiliary agent material mouth; Central part on the plate body of the bottom of kettle 11 has the central circular hole as discharging opening.

Vacuumize on the plate body at the first circular hole place at the airtight top that is weldingly fixed on kettle 11 of mouthpiece 12.Dnockout mouthpiece 13 is airtight to be weldingly fixed on the plate body at the second circular hole place at top of kettle 11.Bleeder valve 14 is a ball valve, and bleeder valve 14 is fixedly connected on from the below on the plate body of discharging opening of bottom of kettle 11, and whether discharging is controlled to the material in the kettle 11.Chuck 15 is enclosed on the lateral outer of kettle 11 by chuck plate 16, and is fixedly connected on the outer wall of kettle 11 by the plate end of the inside bending of its upper and lower side, thereby forms an air blanketing and constitute between kettle 11 and chuck plate 16.The bottom, side of chuck 15 is provided with hot oil inlet pipe 15-1, and the top, side of chuck 15 is provided with hot oil outlet pipe 15-2.

Rabbling mechanism 2 comprises variable-frequency motor 21, reductor 22, shaft 23, stirrer paddle 24, fixed support 25 and Limit Bearing 26.The motor shaft of variable-frequency motor 21 also is the power input shaft of reductor 22, reductor 22 is by on the airtight kettle 11 that is fixedly connected on reactor 1 of its base, and be positioned at the center of top position of kettle 11, the power output shaft of reductor 22 be passed down through kettle 11 the top central circular hole and stretch in the kettle 11.Fixed support 25 is fixed in the kettle 11 of reactor 1, and is positioned at the central position of the bottom of kettle 11.Limit Bearing 26 is installed on the fixed support 25, and is positioned at the top of fixed support 25.Shaft 23 and stirrer paddle 24 all are arranged in kettle 11 inner chambers of reactor 1, the upper end of shaft 23 links to each other with the lower end that stretches into the power output shaft in the kettle 11 downwards of reductor 22 by shaft coupling, the lower end of shaft 23 is stretched in the inner ring of Limit Bearing 26, and with the inner ring tight fit of Limit Bearing 26.Stirrer paddle 24 is fixed on the shaft 23.

See Fig. 2, the protective device 3 that feeds intake comprises feed hopper 31, first valve 32, container 33, feeding intake vacuumizes mouthpiece 34, discharge nozzle 35 and second valve 36.The integral piece that container 33 is made through the punching press welding for steel plate, central part on the plate body at the top of container 33 has the circular hole as charging aperture, also have near the circular hole as vacuum orifice that is positioned at the charging aperture on the plate body at the top of container 33, the central part on the plate body of the bottom of container 33 has the circular hole as discharging opening.Feed hopper 31 by its discharging opening position that is positioned at the lower end from the plate body of the airtight charging aperture that is weldingly fixed on container 33 in top.First valve 32 is arranged on the bottom of feed hopper 31, and whether the material that enters feed hopper 31 is entered container 33 controls.Feed intake on the plate body at the vacuum orifice place that vacuumizes the airtight top that is weldingly fixed on container 33 of mouthpiece 34.The upper end of discharge nozzle 35 is airtight to be weldingly fixed on the plate body at discharging opening place of container 33, and the lower end of discharge nozzle 35 is airtight to be weldingly fixed on the plate body at auxiliary agent material mouth place of kettle 11.Second valve 36 is arranged on the discharge nozzle 35, and whether enters kettle 11 and control entering material in the discharge nozzle 35.

The rubber polymerizing reactor of present embodiment in use, first valve 32 and second valve 36 of the protective device 3 that feeds intake all are in closed condition.By product pump or high-level container liquid material dimethyl ring body siloxanes and methyl ethylene Fourth Ring body are dropped in the kettle 11 of reactor 1 by dnockout mouthpiece 13, the kettle 11 to reactor 1 vacuumizes by the vacuumizing mouthpiece 12 of reactor 1 to start vavuum pump simultaneously.Open first valve 32 of the protective device 3 that feeds intake; auxiliary agents such as catalyst, molecular weight regulator, contents of ethylene controlling agent are poured in the container 33 by feed hopper 31; close first valve 32 then; restarting other vavuum pump vacuumizes mouthpiece 34 by the feeding intake of protective device 3 that feed intake and container 33 is vacuumized; open second valve 36 again, make auxiliary agent flow in the kettle 11 of reactor 1.Deep fat enters the chuck 15 from the hot oil inlet pipe 15-1 of chuck 15, and the hot oil outlet pipe 15-2 from chuck 15 flows out again, constantly circulation, thus the material in the kettle 11 of reactor 1 is heated.2 pairs of materials of rabbling mechanism stir, thereby make materials overturning flow thermally equivalent in the kettle 11 of the reactor 1 that vacuumizes, polymerization reaction take place.After reaction finished, material was discharged by the bleeder valve 14 of reactor 1.

Claims

1. a rubber polymerizing reactor is characterized in that: comprise reactor (1), rabbling mechanism (2) and the protective device that feeds intake (3);

Reactor (1) comprises kettle (11), vacuumizes mouthpiece (12), dnockout mouthpiece (13), bleeder valve (14) and chuck plate (16); Chuck plate (16) constitutes chuck (15) jointly with kettle (11); Vacuumize mouthpiece (12) and dnockout mouthpiece (13) and all be arranged on the top of kettle (11); Bleeder valve (14) is fixedly connected on the discharging opening of kettle (11) bottom center position from the below;

Rabbling mechanism (2) comprises variable-frequency motor (21), reductor (22), shaft (23), stirrer paddle (24), fixed support (25) and Limit Bearing (26); The motor shaft of variable-frequency motor (21) also is the power input shaft of reductor (22), and reductor (22) is fixedly connected on the kettle (11) of reactor (1) by its base, and is positioned at the center of top position of kettle (11); Fixed support (25) is fixed in the kettle (11) of reactor (1), and is positioned at the central position of the bottom of kettle (11); Limit Bearing (26) is installed on the fixed support (25), and is positioned at the top of fixed support (25); Shaft (23) and stirrer paddle (24) all are arranged in kettle (11) inner chamber of reactor (1), the upper end of shaft (23) links to each other with the lower end that stretches into the power output shaft in the kettle (11) downwards of reductor (22) by shaft coupling, the lower end of shaft (23) is stretched in the inner ring of Limit Bearing (26), and with the inner ring tight fit of Limit Bearing (26); Stirrer paddle (24) is fixed on the shaft (23);

The protective device (3) that feeds intake comprises feed hopper (31), first valve (32), container (33), feeding intake vacuumizes mouthpiece (34), discharge nozzle (35) and second valve (36); Feed hopper (31) is linked to each other with the charging aperture of container (33) by the discharging opening that it is positioned at the lower end, and is positioned at the top at the top of container (33); First valve (32) is arranged on the bottom of feed hopper (31); Feed intake and vacuumize the side that mouthpiece (34) is arranged on the top of container (33); The discharging opening that is positioned at the bottom of the upper end of discharge nozzle (35) and container (33) links to each other, and the lower end of discharge nozzle (35) is fixed on the top of the kettle (11) of reactor (1), and with the intracavity inter-connection of kettle (11); Second valve (36) is arranged on the discharge nozzle (35).

2. according to the described rubber polymerizing reactor of claim 1, it is characterized in that: the chuck (15) of described reactor (1) is enclosed on the lateral outer of kettle (11) by chuck plate (16), and be fixedly connected on the outer wall of kettle (11), thereby between kettle (11) and chuck plate (16), form an air blanketing and constitute by the plate end of the inside bending of its upper and lower side; The bottom, side of chuck (15) is provided with hot oil inlet pipe (15-1), and the top, side of chuck (15) is provided with hot oil outlet pipe (15-2).