Novel airlift reactor with self-absorption aeration structure

Abstract

The invention provides a novel airlift reactor with a self-absorption aeration structure, which comprises a reaction tank body, a liquid inlet, an upper air inlet and an air outlet are arranged on an upper end cover of the reaction tank body, a water outlet, a sealing element and a generator are arranged on a lower end cover of the reaction tank body, and a cooling water inlet is arranged at the upper end of the side wall of the sealing element. A lower air inlet is formed in the middle of the side wall, a cooling water outlet is formed in the lower part of the side wall, the generator is fixed on the lower end surface of the sealing element, a guide cylinder and a self-suction aeration gas distributor are arranged in the reaction tank body, the guide cylinder and the reaction tank body are coaxially arranged, the diameter of the self-suction aeration gas distributor is smaller than the inner diameter of the guide cylinder, and the self-suction aeration gas distributor is arranged in the reaction tank body. And the guide cylinder covers the periphery of the self-absorption aeration gas distributor. The airlift reactor is high in volume mass transfer coefficient, the gas-liquid contact area mixing time is prolonged, and the effect of promoting mixing and mass transfer is achieved. Meanwhile, the device has the advantages of convenience in disassembly and assembly, easiness in cleaning, simplicity in manufacturing, low cost and the like.

Description

technical field [0001] The invention belongs to the technical fields of chemical engineering, biological engineering and environmental engineering, and in particular relates to a novel air-lift reactor with a self-priming aeration structure. Background technique [0002] The airlift reactor (Airlift Reactor, AR) is developed on the basis of the bubble column reactor (Bubble Column, BC), and is used for gas-liquid or gas-liquid-solid multiphase flow reaction. The internal loop airlift reactor (InternalLoop Airlift Reactor, ILAR) is a special type of airlift reactor, which consists of a tank, an inlet pipe, a liquid material inlet and outlet pipe, and an exhaust pipe and equipment on the upper part of the tank. It is composed of the guide tube inside the tank and so on. Its basic principle is to use the energy of compressed air to fully mix gas and liquid in the guide tube for mass transfer of gas and nutrients, and its mixing performance is better than that of bubble column ...

AI Technical Summary

Problems solved by technology

But at low aeration rates, air bubbles accumulate and gas clogging occurs

In addition, the internal parts of the tank are difficult to access and clean, which is not conducive to biological reactions and fermentation

These methods have their disadvantages, such as high shear force, high energy consumption, or difficult to scale up, and difficult to implement, so it is urgent to find a device that is both simple and easy to scale up to solve the problem of bubble size and coalescence

[0004]Due to the low operational flexibility of the existing internal circulation airlift reactor, there are deficiencies such as fixed tank structure, few structural parameters that can be optimized, and inconvenient cleaning.

Images