An ultra-high sealing polycarbonate reaction device
A sealing device, polycarbonate technology, applied in the sealing of engines, chemical/physical/physicochemical fixed reactors, mechanical equipment, etc., can solve the problem that the residence time of materials is difficult to control, side reactions are prone to occur, and shaft seals cannot meet the requirements. High-vacuum environment and other problems to achieve the effect of improving the reaction effect, preventing side reactions, and preventing overheating side reactions
Active Publication Date: 2020-11-20
INST OF PROCESS ENG CHINESE ACAD OF SCI
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Problems solved by technology
[0008] The invention proposes an ultra-high sealing polycarbonate reaction device, which solves the problems that the material residence time is not easy to control in the final polycondensation process of polycarbonate, side reactions are prone to occur, and the shaft seal cannot meet the high vacuum environment.
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[0028] The technical solutions of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0029] Such as Figure 1-2 Shown, a kind of ultra-high sealing polycarbonate reaction device, comprises final polycondensation reactor, material inlet 1 and material outlet 2, and described final polycondensation reactor comprises inner cylinder 3, and inner cylinder 3 is provided with heat-conducting oil jacket 4. There is a driving device inside the inner cylinder 3; the inner cylinder 3 is provided with a front flange 4, and the front flange 4 is provided with a combined mechanical seal devic...
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The invention provides an ultrahigh-sealing polycarbonate reaction device which comprises a final polycondensation reactor, a material inlet and a material outlet, wherein the final polycondensation reactor comprises an inner cylinder; a heat conduction oil jacket is arranged outside the inner cylinder; the inner cylinder is internally provided with a driving device; a front flange is arranged on the inner cylinder; a combined mechanical sealing device is arranged on the front flange; the combined mechanical sealing device comprises primary sealing and secondary sealing; the primary sealing comprises a machine sealing bracket connected with the front flange; a plurality of sealing rings are mounted inside the machine sealing bracket; and the combined mechanical sealing device is connected with a motor through a coupling. Due to adoption of the combined mechanical sealing device of the ultrahigh-sealing polycarbonate reaction device, an ultrahigh sealing effect is provided for the system, the vacuum degree is up to 10Pa, and the product quality is greatly improved.
Description
technical field [0001] The invention relates to the field of polycarbonate production, in particular to an ultra-high sealing polycarbonate reaction device. Background technique [0002] Transesterification polycarbonate, also known as melt polycarbonate, uses bisphenol and diphenyl carbonate to melt and polycondense for transesterification, and continuously discharges phenol under high temperature and reduced pressure conditions to increase the degree of reaction and molecular weight. The reaction raw material purity requirement is higher, the reaction speed is slower, the reactor structure is more complex, and requires a high airtightness. [0003] The preparation process of transesterification polycarbonate includes esterification process and polycondensation process. In the current published related patents, the final polycondensation reactor is mostly a horizontal disc reactor with high liquid holding capacity. The structure includes horizontal cylinder, cylinder The b...
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IPC IPC(8): B01J19/18B01J19/20F16J15/43F16J15/16C08G64/20
CPCB01J19/0066B01J19/0073B01J19/18B01J19/20C08G64/205F16J15/16F16J15/162F16J15/43
Inventor 张锁江徐菲张延强周志茂何宏艳张振才杨子锋
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI