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A gas-liquid surge mixing method

A gas-liquid and mixer technology, applied in mixing methods, gas/vapor and liquid mixing, chemical instruments and methods, etc., can solve problems such as affecting product quality, increasing production costs, and decreasing stirring efficiency.

Active Publication Date: 2020-03-13
CHINA UNIV OF PETROLEUM (BEIJING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0014] Pulse stirring has higher efficiency, lower cost, and is more flexible, but one of the main limitations is the problem of continuity
Pulse stirring is an intermittent working mechanism. For suspensions and emulsions, precipitation and stratification will occur after the stirring is stopped, which will affect the quality of the product, reduce the stirring efficiency and increase the production cost.
"Submerged Gas Pulse Stirring Device (Patent No.: 201620188879.1)" The gas disturbs the liquid in the form of pulses, the liquid level drops → the float falls → the gas ejects → the liquid level rises → the float blocks the opening as a reciprocating process, Stirring is a batch process, and the gas pulse stirring device is a small flow air flow, which has low efficiency and high cost

Method used

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Embodiment 1

[0081] This embodiment provides a gas-liquid surge mixing method, which is carried out by using the float valve tower 1. The structure of the float valve tower 1 is as follows: Figure 7 As shown, the float valve tower 1 includes a multi-layer tray 2, the tray 2 is connected to the tower wall, and a round single light valve leg limit type float valve 3 is adopted. The height of the overflow weir 5 determines the height of the liquid level on the tray , Tower equipment scale, opening rate, overflow weir 5 height, valve weight are shown in Table 1.

[0082] Table 1 Structural parameters and operating parameters of the surge mixer

[0083]

[0084]

[0085] Where: F o Is the kinetic energy factor of the valve hole, u s Is the valve hole velocity, ρ V Is the gas phase density.

[0086] The main frequency of surge is measured experimentally. The pressure wave signal measured by the pressure sensor in the experiment, through Fourier transform and wavelet analysis, the part where the ampli...

Embodiment 2

[0092] This embodiment provides a gas-liquid surge mixing method, which is carried out by using the float valve tower 1. The structure of the float valve tower is as follows: Figure 7 As shown, the float valve tower 1 includes multi-layer trays 2. The trays 2 are connected to the tower wall, and a round single light valve leg limit type float valve 3 is adopted. The tower equipment scale, opening rate, weir height, and valve weight are as Table 2 shows.

[0093] Table 2 Structural parameters and operating parameters of the surge mixer

[0094]

[0095] The method includes the following steps:

[0096] The liquid phase is fed from the upper part of the valve tower 1, and flows in the horizontal direction on the valve tray 2 after feeding, and then the liquid is diverted from the downcomer 4 to the lower tray 2, and the gas phase enters from the lower part of the valve tower 1. The material rises from the bottom of the tray 2 through the openings of the tray in pulse bubbling, which...

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Abstract

The invention relates to a gas-liquid surge mixing method. The method uses the valve tower as a surge tower mixer to realize gas-liquid mixing. Multi-layer trays are installed in the valve tower, float valves are installed on the trays, and downcomers are arranged between the trays. The method includes the following steps: Steps: The liquid phase is fed from the upper part of the valve tower, and after feeding, it flows along the horizontal direction on the valve tray, and then is guided to the lower tray by the downcomer; the gas phase is fed from the lower part of the valve tower, and is fed by the The bottom of the tray rises through the opening of the tray in the form of pulse bubbling, driving the float valve on the tray to move up and down, so that the gas phase, liquid phase and float valve above the tray form a periodic vertical pulsation with a certain vibration frequency; The vibration frequency is the same or close to the first natural frequency or the second natural frequency of the float valve tower, which produces a surge phenomenon and realizes the mixing of the gas phase and the liquid phase. When the resonance occurs, the vibration amplitude of the float valve and the gas-liquid vibration is very high and the vibration is uniform, so that the gas phase and the liquid phase can be fully mixed.

Description

Technical field [0001] The invention relates to a gas-liquid surge mixing method, which belongs to the technical field of chemical processing industry. Background technique [0002] Introduction to mixing device and technology [0003] As the basic unit operation of the process industry, mixing is widely used in the chemical, petrochemical, pharmaceutical, biochemical, food, cosmetic and other industries. In the unit operation, mixing is called "mixing". The mixing operation is an important part of the chemical reaction process. The mixing process is the process of momentum, heat, mass transfer and chemical reactions in the flow field. Mixing can be divided into two categories: micro mixing and macro mixing. In the chemical processing industry, it is mainly the macroscopic mixing, that is, the dynamic action of the turbulent vortex causes the diffusion of the substance in the macroscopic part of the diffusion medium, and its magnitude is the magnitude of the macroscopic scale. [...

Claims

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Application Information

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IPC IPC(8): B01F3/04
CPCB01F23/20
Inventor 曹睿刘艳升杨亚楠刘拥军
Owner CHINA UNIV OF PETROLEUM (BEIJING)
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