Self-suction mixing reactor

A self-priming, reactor technology, applied in chemical/physical/physicochemical fixed reactors, mixers with rotating stirring devices, chemical instruments and methods, etc., can solve the problem of critical speed and suction without research on baffles The influence of the volume, the influence of the lower paddle is not studied, the strength of the stirring shaft is reduced, etc., to achieve the effect of good gas-liquid contact, simple coordination, and improved mass transfer efficiency

Inactive Publication Date: 2009-06-03
EAST CHINA UNIV OF SCI & TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The existing patent reports did not study the influence of the lower paddle, nor the influence of the baffle on the critical speed and air intake
For the gas-liquid-solid three-phase stirred reactor, the bottom support is often not set to prevent the particles from clogging the bearing, resulting in unstable operation and easy damage; and the air inlets are all set on the same plane, which reduces the strength of the stirring shaft

Method used

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Examples

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example 1

[0036] The dichlorobenzene potassium salt carboxylation reaction device with a diameter of 0.7m and an effective volume of 200L is agitated by a double-blade paddle impeller with a rotation speed of 200rpm and a reaction time of 16 hours. Using a self-priming stirred gas-liquid reactor, the reaction time is shortened to 8 hours under the condition of constant rotation speed, and the by-products are reduced, so that the consumption of raw materials is reduced by 30%.

example 2

[0038] The dichlorophenol potassium salt carboxylation reaction device with an effective volume of 10000L is stirred by a double-bladed paddle impeller with a rotating speed of 200rpm and a reaction time of 18 hours. Using a self-priming stirred gas-liquid reactor, the reaction time is shortened to 9 hours under the condition of constant rotation speed, and the by-products are reduced, so that the consumption of raw materials is reduced by 30%.

example 3

[0040]The dichlorophenol potassium salt carboxylation reaction device with an effective volume of 1000ML adopts double-blade paddle impeller stirring, the rotating speed is 450rpm, and the reaction time is 16 hours. A self-priming stirred gas-liquid reactor is adopted, and the reaction time is shortened to 9 hours at a rotating speed of 200 rpm, basically no tar is generated, and the consumption of raw materials is reduced by 20%.

[0041] In summary, the present invention fully grasps the law of air suction control, makes the coordination of air suction volume, stirring speed, and stirring energy consumption simple, makes the gas-liquid contact good, the mass transfer efficiency is greatly improved, and the chemical reaction is more complete, thereby greatly The reaction time is shortened, so that the yield of the product is significantly increased; and the form of paddle stirring is not limited, which can fully meet the needs of different stirring.

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Abstract

The invention relates to a self-suction mixing reactor, comprising a cylinder body and a mixing device which is arranged in the cylinder body. The self-suction mixing reactor is characterized in that the mixing device comprises a hollow mixing shaft with an air inlet; the lower part of the hollow mixing shaft is sequentially connected with a self-suction mixing oar and a lower layer mixing oar; the self-suction mixing oar is connected with an air outlet branch pipe which is communicated with the hollow mixing shaft. The self-suction mixing oar is provided with the air outlet branch pipe for dispersing gas, an upper-push axial-flow oar is used as the lower layer mixing oar and a full-baffle structure is employed; all the three measures reduce the critical rotation speed to different extent when being sucked in, increase the suction quantity of the gas, lead the contact of gas and liquid to be good, improve the mass transfer efficiency, lead the cooperation of mixing rotation speed and mixing energy dissipation to be simple, thus obviously improving the yield of the product.

Description

technical field [0001] The invention relates to a self-priming stirred reactor, which is especially suitable for gas-liquid and gas-liquid-solid heterogeneous reaction processes. Background technique [0002] Gas-liquid and gas-liquid-solid multiphase stirred reactors are a very important class of reactors, and it is often necessary to redisperse the gas at the top of the reactor into the liquid phase to improve the reaction rate and gas utilization. The self-priming gas-liquid reactor is a reaction device that can self-inhale the gas in the upper space of the reactor for gas-liquid contact without additional gas conveying machinery. Inhale the outside gas to achieve the purpose of gas-liquid dispersion and reaction. However, an important feature of the self-priming stirring paddle is that only when the stirring speed reaches above the critical speed, will there be gas inhaled and dispersed into the liquid, and the higher the speed, the greater the gas suction; when the spe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J19/18B01F7/18
Inventor 程振民鞠凡陈建华储消和周志明袁佩青余中宝
Owner EAST CHINA UNIV OF SCI & TECH
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