Guide-plate type ethene polymerization kettle used in slurry process
A technology of ethylene polymerization and deflectors, which is applied to mixers, chemical instruments and methods, mixers with rotating stirring devices, etc., can solve the problems of limited heat removal capacity, long residence time, and low production efficiency of reactors. Achieve the effect of strong heat removal ability and high conversion rate
Active Publication Date: 2013-09-04
PETROCHINA CO LTD
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Problems solved by technology
The ethylene polymerization reaction is a strong exothermic reaction. The prior art uses a jacket and multiple sleeves in the kettle to remove the heat. This kind of heat removal scheme results in a long residence time of the reaction materials in the reactor due to the limited heat removal capacity. The disadvantage of low production efficiency
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[0012] Such as figure 1 , figure 2 As shown, the slurry method deflector type ethylene polymerization kettle of the present invention is composed of a kettle body 1, a deflector 2, a stirring device 4, and a multi-pipe distributor 8; the deflector 2 is a hollow plate structure, located in the kettle body 1, the ratio of the width of the guide plate to the diameter of the kettle is 0.1 to 0.3, the cross section is parabolic, and forms an angle of 30° to 90° with the inner wall of the polymerization kettle; the stirring device 4 is arranged on the top of the kettle body, and the stirring device The stirring shaft 5 vertically passes through the center of the space formed by the kettle body and the deflector, the lower end is located in the middle and lower part of the kettle body, above the multi-tube distributor 8, the bottom paddle of the stirring shaft is a radial flow paddle 7, and the upper paddle It is an axial-flow airfoil stirring paddle 6; the multi-tube distributor 8...
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The invention relates to a guide-plate type ethene polymerization kettle used in a slurry process, comprising an autoclave body, a guide plate, a stirring device and multi-pipe distributors. The guide plate is a hollow slab and is located in the autoclave body; the ratio of the width of the guide plate to the diameter of the autoclave body is in a range of 0.1 to 0.3; the cross section of the guide plate is in a shape of parabola; the angle between the guide plate and the inside wall of the autoclave body is in a range of from 30 degrees to 90 degrees. The stirring device is arranged on the top of the autoclave body; a stirring shaft of the stirring device extends downwards and passes through the autoclave body and the hollow center of the guide plate; the lower part of the stirring shaft is near the bottom of the autoclave body and above the multi-pipe distributors; the bottom stirring paddle of the stirring shaft is of radial flow type and the upper stirring paddle of the stirring shaft is of axial flow type. The multi-pipe distributors employ a telescopic structure and uniformly distribute on the bottom of the autoclave body. The exterior wall of the autoclave body is provided with a jacket. The polymerization kettle provided in the invention has excellent heat-removing capacity, which enables a high conversion rate of ethene, and therefore the problem that heat produced in polymerization is difficult to remove in engineering scaling-up of a polymerization kettle is solved.
Description
technical field [0001] The invention relates to a slurry method ethylene polymerization kettle, in particular to a slurry method deflector type ethylene polymerization kettle. Background technique [0002] The production device for producing polyethylene by slurry method is an ethylene polymerization tank, ethylene and solvent are fed into the bottom of the reactor, and the reaction product and solvent are discharged from the top of the reactor. The ethylene polymerization reaction is a strong exothermic reaction. The prior art uses a jacket and multiple sleeves in the kettle to remove the heat. This kind of heat removal scheme results in a long residence time of the reaction materials in the reactor due to the limited heat removal capacity. The disadvantage of low production efficiency. Contents of the invention [0003] The object of the present invention is to provide a slurry method deflector type ethylene polymerization kettle with stronger heat removal capacity of t...
Claims
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IPC IPC(8): B01J19/18B01F7/18C08F10/02
Inventor 周敏姜明王健胡学悦高正明付丽刘黎明
Owner PETROCHINA CO LTD