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Stirred tank reactor

A stirred tank and reactor technology, which is applied in the field of stirred tank reactors for olefin slurry polymerization, can solve the problems of shortening the cleaning cycle of the heat exchanger, increasing the scaling of the heat exchanger, decreasing the heat exchange capacity, etc. The effect of reducing residence time, slurry entrainment, and reducing operating costs

Inactive Publication Date: 2012-02-22
ZHEJIANG UNIV
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  • Claims
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Problems solved by technology

A large amount of slurry entrainment will cause more and more solids to enter the tank top heat exchanger, resulting in increased fouling of the heat exchanger, a decrease in heat exchange capacity, and a shortened cleaning cycle of the heat exchanger. In severe cases, production shutdown will occur. technical issues

Method used

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  • Stirred tank reactor
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Embodiment 1

[0063]Embodiment 1 adopts a specific structure of the stirred tank reactor of the present invention, and there are 8 air inlet pipes, wherein, half of the air inlet pipes run through the top of the stirred tank body 1 and extend to the bottom of the stirred tank body 1, and the other half of the air inlet pipes are at the bottom of the stirred tank body 1. Inside the stirred tank body 1, it extends from the end close to the top to the bottom. The baffle 14 is a finger-shaped baffle, and 4 finger-shaped baffles are equidistantly installed on one intake pipe (1# finger-shaped baffle means the first finger-shaped baffle from the top of the stirring tank to the bottom of the stirring tank) 1# turbine means the first layer of turbines from the top of the stirred tank to the bottom of the stirred tank, and so on, the same below), 4 of the 8 inlet pipes are provided with finger-shaped baffles, a total of 16 finger-shaped baffles shaped baffle.

[0064] The first layer of turbine 9 a...

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Abstract

The invention discloses a stirred tank reactor and aims at improving a stirring turbine in the stirred tank reactor by using a four-layer combination stirring turbine. The stirring turbine comprises a first layer turbine, a second layer turbine, a third layer turbine and a fourth layer turbine which are arranged from the middle to the bottom of a stirring shaft sequentially. The first layer turbine is an upward axial flow turbine, the second layer turbine is a disk type turbine, the third layer turbine is an upward axial flow turbine, and the fourth layer turbine is a radial flow turbine. Radial circulation close to a liquid level, radial circulation close to a middle area of a stirred tank and radial circulation in a bottom area of the stirred tank are formed, so that circulation quantity inside the stirred tank is big and mixing time is short. Poor mixing area does not exist, and solid containing rate and gas containing rate are evenly distributed. A mass transfer condition of air and liquid is good, and single transfer efficiency is high. Entrainment quantity of sizing is greatly reduced, fouling of a heat exchanger is reduced, and service life is long. Operation cost is lowered, and production cost is saved.

Description

technical field [0001] The invention relates to the field of stirred tank reactors, in particular to a stirred tank reactor for olefin slurry polymerization. Background technique [0002] Stirred tank reactors are widely used in many fields of industry. According to statistics, about 70% of the production of the three major polymer synthetic materials is completed by using stirred tank reactors. In the industrial production process, the stirring and mixing performance of the stirred tank reactor directly affects the product quality, production cost and energy consumption. [0003] Stirred tanks are classified according to their uses, including liquid-phase homogeneous stirred tanks, gas-liquid two-phase stirred tanks, solid-liquid two-phase stirred tanks, gas-liquid-solid three-phase stirred tanks, etc. Many industrial processes, especially the olefin polymerization process, will encounter the occasion of gas-liquid-solid three-phase contact and mixing, and the gas-liquid-...

Claims

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Application Information

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IPC IPC(8): C08F10/00C08F2/01C08F2/04B01J19/18B01F7/16
Inventor 王靖岱胡雨晨黄正梁蒋斌波阳永荣王唯群沈煜栋张擎何乐路蒋云涛
Owner ZHEJIANG UNIV
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