CN203018077U

CN203018077U - Polypropylene polyreactor

Info

Publication number: CN203018077U
Application number: CN2012206721908U
Authority: CN
Inventors: 吴翠荣
Original assignee: Zibo Vocational Institute
Current assignee: Zibo Vocational Institute
Priority date: 2012-11-30
Filing date: 2012-11-30
Publication date: 2013-06-26
Anticipated expiration: 2022-11-30

Abstract

The utility model discloses a polypropylene polyreactor, and belongs to chemical substance polymerization equipment. The polypropylene polyreactor comprises a reactor body, a transmission system, a stirring system, a measurement and control system and a radiating system, wherein the reactor body is composed of an inner tube, an upper head and a lower head, which are hermetically welded; the transmission system comprises a motor, a speed reducer, a stirring shaft, an elastic coupling, a rigid coupling and a rack; the stirring system comprises a bottom twin-spiral stirring paddle and a single-spiral stirring paddle, which are fixedly connected with the stirring shaft; the measurement and control system comprises a temperature-measuring probe and a control instrument panel; and the radiating system comprises a U-shaped heat exchange pipe, a water outlet pipe, a water inlet pipe, a water jacket, a double-helical diversion pole. The double-helical diversion plate is arranged between the inner tube and the jacket, and the U-shaped heat exchange pipe is arranged in the inner tube, so that the heat exchange area of the equipment is increased, and the heat exchange efficiency of the equipment is improved.

Description

The polypropylene polymerization reaction kettle

Technical field

The utility model belongs to the chemical substance polymerization unit, is specifically related to a kind of polypropylene polymerization kettle.

Background technology

polyacrylic polymerization is: when polymerization temperature reaches a critical point, polymerization system reaches maximum temperature within a few minutes, complete chemical polymerization, at this moment polymerization system can be ignored with extraneous heat exchange, propylene monomer polymerization each other is exothermic reaction, propylene monomer quantity in reactor is certain, the heat of polymerization of emitting is also certain, when the weather at high temperature, the starting stage of polymerisation has absorbed too many heat from environment when, add quantitative reactive polymeric heat, the reaction temperature of polymerization just rises very highly, polymerization rate is accelerated, molecular weight product reduces, over 90 ℃, the chemical constitution of polyacrylamide amine molecule just becomes water-soluble bad network structure by water-soluble fabulous linear structure, affects the serviceability of product when polymerization temperature.

Polyacrylic aqueous solution polymerization is generally to carry out in polymerization tank or reactor, polyacrylic chemical polymerization, and in the initial polymerization stage, polymerization temperature is very low, and polymerization speed is slow, under perfect condition, when polymerization temperature rises to 30 ℃ of left and right, probably needs approximately 3 hours; Polyacrylic chemical polymerization is an exothermic process; in this process of approximately 3 hours; if environment temperature is too low; the heat that chemical polymerization produces will be dispersed in surrounding environment gradually; polymerization temperature is in low-temperature condition all the time; chemical polymerization polymerization speed at lower temperature is very slow, and result is that polymerization time reaches tens hours, and perhaps polymerization stops.So the variation of polymerization environment temperature has the molecular weight of product and seriously influences, and whether polymerization process is also seriously influenced smoothly, also has influence on the water-soluble of product, causes the unstable of product quality.

the polypropylene polymerization reaction kettle is the polyacrylic chemical industry equipment of preparation, for the polypropylene polymerization reaction kettle, the quality of its agitating function and heat exchange function directly has influence on polyacrylic productive rate and quality, aspect stirring, the stirring system that existing polypropylene polymerization reaction kettle adopts mostly is greatly two ribbon stirring systems, two ribbon stir system design are complicated, processing difficulties, and consumed power is larger, aspect heat exchange, the heat exchange tube structure of existing polypropylene polymerization reaction kettle generally all adopts dactylethrae, the heat exchange area of dactylethrae is smaller, heat exchange efficiency is low, just can't meet consumers' demand in the heat exchange of needs large tracts of land.

Summary of the invention

The polypropylene polymerization reaction kettle that the purpose of this utility model is to provide a kind of polymerization environment temperature stabilization, polymerization process is carried out smoothly.

The technical solution of the utility model is:

The polypropylene polymerization reaction kettle comprises: kettle, transmission system, stirring system, TT﹠C system, cooling system, and wherein, kettle is made of inner core, upper cover, low head seal welding; Transmission system comprises motor, decelerator, shaft, yielding coupling, positive coupling, frame; Stirring system comprises the two ribbon stirrer paddles in bottom, the single ribbon stirrer paddle that shaft is fixedly connected with; TT﹠C system comprises temperature probe, controller dial plate; Cooling system comprises U-shaped heat exchanger tube, outlet pipe, water inlet pipe, water leg, the double helix water conservancy diversion utmost point.

The upper and lower side of described kettle inner core is seal welding upper cover, low head respectively;

Described frame top mounted motor and decelerator; Described frame is fixed on upper flange, and described upper flange is arranged at the top of upper cover, and described low head bottom is provided with lower flange;

Described shaft vertically is arranged on the kettle center, and shaft comprises epimere axis body and hypomere axis body, middlely connects with positive coupling; The upper end of described epimere axis body is stretched out upper cover and is inserted in shaft seal; On described hypomere axis body, the stirrer paddle assembly is installed, the shaft surrounding symmetry in described inner core is laid with four groups of U-shaped heat exchanger tubes.

The utility model compared with prior art, advantage is:

The utility model is installed the double helix deflector between inner core and chuck, the U-shaped heat exchanger tube has been installed in inner core, has increased the heat exchange area of equipment, has improved the heat exchange efficiency of equipment; Inner U-shaped heat exchanger tube can play certain baffle effect simultaneously, and from actual operating position, heat transfer effect is desirable, working stability; Probe bracket is connected with inner core, chuck, and being connected of the lower flange of jacket head and low head is all to adopt flexible structure; In polypropylene production process, because being used alternatingly of hot water or cold water in chuck can produce thermal (temperature difference) stress, and flexible structure can fully absorb consequent thermal (temperature difference) stress, has strengthened reliability of structure, has improved the service life of equipment.

Description of drawings

Fig. 1 is structural representation of the present utility model.

In figure: 1, motor, 2, decelerator, 3, yielding coupling, 4, frame, 5, shaft seal, 6, upper flange, 7, upper cover, 8, positive coupling, 9, outlet pipe, 10, water inlet pipe, 11, shaft, 12, inner core, 13, water leg, 14, the double helix water conservancy diversion utmost point, 15, the U-shaped heat exchanger tube, 16, low head, 17, jacket head, 18, the two ribbon stirrer paddles in bottom, 19, single ribbon stirrer paddle, 20, temperature probe, chuck water inlet 21, chuck delivery port 22.

The specific embodiment

Below in conjunction with accompanying drawing, the utility model is further described:

In conjunction with Fig. 1, the polypropylene polymerization reaction kettle, kettle is made of inner core 12, upper cover 7, low head 16 seal weldings; Transmission system comprises motor 1, decelerator 2, shaft 11, yielding coupling 3, positive coupling 8, frame 4; Stirring system comprises the two ribbon stirrer paddles 18 in bottom, the single ribbon stirrer paddle 19 that shaft 11 is fixedly connected with; TT﹠C system comprises temperature probe 20, controller dial plate; Cooling system comprises U-shaped heat exchanger tube 15, outlet pipe 9, water inlet pipe 10, water leg 13, the double helix water conservancy diversion utmost point 14.

The upper and lower side of described kettle inner core 12 is seal welding upper cover 7, low head 16 respectively;

Described frame top mounted motor 1 and decelerator 2; Described frame 4 is fixed on upper flange 6, and described upper flange 6 is arranged at the top of upper cover 7, and described low head 16 bottoms are provided with lower flange;

Described shaft 11 vertically is arranged on kettle 1 center, and shaft 11 comprises epimere axis body and hypomere axis body, middlely connects with positive coupling 8; The upper end of described epimere axis body is stretched out upper cover 7 and is inserted in shaft seal 5; On described hypomere axis body, the stirrer paddle assembly is installed, the shaft 11 surrounding symmetries in described inner core 12 are laid with four groups of U-shaped heat exchanger tubes 15; Described kettle is outside equipped with the chuck assembly, forms sealed chamber between kettle and chuck assembly, is provided with chuck water inlet 21, chuck delivery port 22 in the position, top and the bottom of water leg 13, is provided with double helix deflector 14 along the kettle outer wall in sealed chamber.

During work, water flows into from water leg water inlet 21, under the guide functions of double helix deflector 14, flows around the kettle outer wall, after the abundant heat exchange of the material in kettle, flows out from chuck delivery port 22.

These are only preferred embodiment of the present invention, not in order to limiting the present invention, all any modifications of doing within the spirit and principles in the present invention, be equal to and replace and improvement etc., within all should being included in protection scope of the present invention.

Claims

1. polypropylene polymerization reaction kettle, comprising: kettle, transmission system, stirring system, TT﹠C system, cooling system is characterized in that: described kettle is made of inner core, upper cover, low head seal welding; Transmission system comprises motor, decelerator, shaft, yielding coupling, positive coupling, frame; Stirring system comprises the two ribbon stirrer paddles in bottom, the single ribbon stirrer paddle that shaft is fixedly connected with; TT﹠C system comprises temperature probe, controller dial plate; Cooling system comprises U-shaped heat exchanger tube, outlet pipe, water inlet pipe, water leg, the double helix water conservancy diversion utmost point.