Airlift reactor having spiral porous sieve plate

An airlift reactor and porous sieve plate technology, which is applied in the fields of chemical engineering, biological engineering and environmental engineering, can solve the problem of reducing the effective range of airlift reactors, unfavorable gas-liquid two-phase efficient mass transfer, and difficult reactor cleaning Operation and other issues, to achieve the effect of broadening the effective operating range, improving the gas-liquid mass transfer process, and strengthening microscopic mixing

Active Publication Date: 2017-04-05
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, installing wire mesh or horizontal sieve plate in the riser will reduce the effective range of operating parameters of the airlift reactor. When the airflow rate is too high, it is easy to form an air block under the wire mesh or horizontal sieve plate, which is not conducive to Efficient mass transfer in gas-liquid two-phase
Furthermore, when wire mesh or horizontal sieve plate is installed, it is not easy to carry out the cleaning operation of the reactor, thus affecting the actual industrial application of wire mesh or horizontal sieve plate device in airlift reactor

Method used

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  • Airlift reactor having spiral porous sieve plate
  • Airlift reactor having spiral porous sieve plate
  • Airlift reactor having spiral porous sieve plate

Examples

Experimental program
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Effect test

Embodiment 1

[0058] see Figure 1 to Figure 3 , as shown in the legend therein, an air-lift reactor with a spiral porous sieve plate is used for gas-liquid two-phase reaction, including a reaction tank body 10, and the internal space of the reaction tank body 10 is allocated as a gas-lift reactor located on the lower side The liquid mixing zone 12 and the gas-liquid separation zone 11 located on the upper side, the gas-liquid mixing zone 12 are provided with a guide tube 20 and a gas distributor 30 up and down, the guide tube 20 is coaxially arranged with the reaction tank body 10 and separates the gas-liquid The mixing zone 12 is divided into a circular descending section 121 located inside the draft tube 20 and an annular rising section 122 located outside the draft tube 20. The gas distributor 30 feeds air into the annular rising section 122, and the airlift reactor also Including the spiral perforated sieve plate 40 installed in the annular ascending section 122 , the plate body of the...

Embodiment 2

[0081] see Figure 4 to Figure 6 , as shown in the legend therein, an air-lift reactor with a spiral porous sieve plate is used for gas-liquid two-phase reaction, including a reaction tank body 10, and the internal space of the reaction tank body 10 is allocated as a gas-lift reactor located on the lower side The liquid mixing zone 12 and the gas-liquid separation zone 11 located on the upper side, the gas-liquid mixing zone 12 are provided with a guide tube 20 and a gas distributor 30 up and down, the guide tube 20 is coaxially arranged with the reaction tank body 10 and separates the gas-liquid The mixing zone 12 is divided into a circular rising section 123 located inside the draft tube 20 and an annular descending section 124 located outside the draft tube 20. The gas distributor 30 feeds air into the circular rising section 123, and the airlift reactor It also includes a spiral perforated sieve plate 40 installed in the circular ascending section 123 , the plate body of t...

Embodiment 3

[0106] All the other are identical with embodiment one, and difference is that the airlift reactor among the present embodiment is used for ventilated culture microorganism, animal cell and plant cell, air flow (m 3 / min) and culture medium volume (m 3 ) ratio of 0.1 to 3, the value tends to the upper limit for small-scale reactors, and the lower limit for medium-scale and large-scale reactions, but the specific operating parameters should be determined according to the actual oxygen consumption requirements of microorganisms. The operating pressure (gauge pressure) is generally 0.2 to 2.0 atm.

[0107] In one embodiment, the reaction tank body, the draft tube and the spiral porous sieve plate are made of transparent materials, so as to be suitable for the photoreaction.

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Abstract

The invention discloses an airlift reactor having a spiral porous sieve plate. The reactor includes a reaction tank body. A flow guide cylinder and a gas distributor are arranged in the reaction tank body. The gas distributor is disposed under a raising section of the flow guide cylinder. A spiral porous sieve plate is arranged in the raising section of the flow guide cylinder. The body of the spiral porous sieve plate is in a spirally raising shape, so that a part of two / three-phased flow in the raising section is guided. There are a plurality of sieve pores in the body of the spiral porous sieve plate, so that the rest of the two / three-phased flow in the raising section is subjected to flow guiding and bubble breaking. The airlift reactor considers both macroscope mixing and microscope mixing, wherein the liquid is driven by ejected gas to flow cyclically, so that raising large bubbles are broken into small bubbles. The reactor can effectively inhibit aggregation of bubbles, increases gas holdup, and increases volume mass transfer coefficient.

Description

technical field [0001] The invention relates to the fields of chemical engineering, biological engineering and environmental engineering, in particular to an airlift reactor with a spiral porous sieve plate. Background technique [0002] Gas-liquid two-phase dispersion and mixing are widely used in process units such as ventilation fermentation, oxidation reaction, hydrogenation reaction, biological aeration, plant cell and algae cell photoreaction. At present, the devices that can realize gas-liquid two-phase mixing and dispersion mainly include: (1) bubble column reactor; (2) airlift reactor; (3) stirred tank reactor; (4) mixing system based on rotating nozzle . [0003] Since the 1970s, many engineers began to study bubble column reactors. The bubble column is a tower reactor in which a gas distributor is installed at the bottom of the reactor, and compressed air is injected from small holes to disperse the gas in the liquid for mass transfer and heat transfer. With it...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J10/00B01J19/24C12M3/02C12M1/21C12M1/08C12M1/02C12M1/00
CPCB01J10/002B01J19/24C12M21/02C12M27/20C12M27/22C12M27/24C12M29/08C12M41/02C12M41/22B01J4/004B01J8/10B01J8/222B01J19/006B01J19/0066B01J19/20B01J19/2405B01J2219/00094B01J2219/00768B01J2219/00772B01J2219/185B01J2219/1943B01J8/08B01J2208/00884B01J2219/24C12M23/22
Inventor 郑志永陈瑜琦詹晓北高敏杰
Owner JIANGNAN UNIV
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