Gas-lifting multi-stage loop reactor for strain cultivation

Abstract

The invention discloses a gas-lifting multi-stage loop reactor for strain cultivation. The loop reactor comprises a flow guide tube and a flow guide pipe; the flow guide pipe is arranged in the flow guide tube; a distributor is arranged at the upper part of the flow guide pipe; nozzles are arranged at the lower part of the flow guide pipe; the nozzles are connected with a gas-liquid mixing tank; the gas-liquid mixing tank is provided with three branches; the second branch is connected with a metering pump; the third branch is connected with an air compressor; the air compressor is also connected with a sprayer; the sprayer is positioned at the bottom of the flow guide tube; a water outlet is arranged at the upper part of one side of the flow guide tube; and the middle part of the flow guide tube is provided with optical fiber probes. The loop reactor provided by the invention has the advantages that the structure is simple, the chord length of rising air bubbles can be reduced by jet flows, the overall gas content rate is increased, the distribution of the gas liquid in a descent section is improved, the liquid circulation velocity is increased, and finally, the gas-liquid volume mass transfer coefficient is obviously improved.

Description

technical field [0001] The invention relates to the technical field of mechanical equipment, in particular to an airlift multi-stage loop reactor for strain cultivation. Background technique [0002] Airlift loop reactors are widely used in gas-liquid, gas-liquid-solid reaction or separation processes in biochemical, petrochemical, sewage treatment and other fields. In the traditional air-lift loop reactor, the bubbles continue to coalesce and become larger during the rising process, which brings two adverse effects: 1. The buoyancy force of the large bubbles is large and the drag force is small, so they cannot be brought to the descending section by the circulation, making the descending section, Especially the gas holdup at the bottom is very small; 2. The gas-liquid interface area is reduced, which is not good for mass transfer. In order to solve this problem, a multi-stage loop reactor was developed. By dividing the guide tube into multiple sections to form a circulatio...

AI Technical Summary

Problems solved by technology

However, for some gas-liquid mixed systems with high viscosity fluids, the gas-liquid mixing intensity and gas distribution of the multi-stage loop reactor are still not ideal.

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