Technology for foam separation of different surfactants

A surfactant and foam separation technology, applied in the direction of foam dispersion/prevention, can solve problems such as difficult drainage and large flow resistance, and achieve the effects of no pollution in operation, increased concentration ratio, and simple equipment

Inactive Publication Date: 2012-04-25
HEBEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

During the foam discharge process, the bubbles flow from bottom to top along the tower, and the liquid to be discharged entrained by the bubbles flows from top to bottom, that is to say, there is a countercurrent between the bubbles and the liquid to be discharged entrained by the bubbles, Therefore, the flow resistance is large and the drainage is difficult

Method used

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  • Technology for foam separation of different surfactants
  • Technology for foam separation of different surfactants
  • Technology for foam separation of different surfactants

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] The first step is to design and manufacture a new type of foam separation tower with spiral components

[0027] Manufacture of a new type of foam separation tower with helical components as attached figure 1 As shown, the tower is composed of an air compressor 1, a buffer bottle 2, a gas flow meter 3, a gas distributor 4, a spiral foam separation tower 7, and a foam collection device 6. The air compressor 1 sends the compressed air to the buffer bottle 2 through the rubber hose, and the air from the buffer bottle 2 enters the gas flow meter 3, and the gas flow meter 3 is used to adjust the gas velocity entering the foam separation tower. The air from the gas flow meter 3 enters the air distributor 4 at the bottom of the spiral foam separation tower 7 through the rubber hose, and the air enters the spiral foam separation tower 7 through the air distributor 4, and the bottom valve 5 is used to adjust the solution to be separated in the foam separation tower 7 liquid lev...

Embodiment 3

[0065] The first step is to design and manufacture a new type of foam separation tower with spiral components

[0066] It is pointed out that the inner diameter of the spiral foam separation tower 7 is 50 mm, the height is 1200 mm, the ratio of the pitch h of its components to the diameter d of the components is 1.4, the pitch is 70 mm, and the angle of inclination is 45 °. Others are the same as those in Example 1. first step;

[0067] The second step, the foam separation system

[0068] Choose bio-surfactant soy protein;

[0069] The third step, foam separation surfactant soybean protein process

[0070] 1. Prepare surfactant soybean protein solution

[0071] Prepare a solution of surfactant soybean protein, the concentration of which is 0.3-0.5g / L;

[0072] 2. Adjust the pH value of the prepared surfactant soybean protein solution

[0073] Regulate the pH of the prepared surfactant SDS solution with a concentration of 1mol / L hydrochloric acid or 1mol / L sodium hydroxide...

Embodiment 4

[0084] The first step is to design and manufacture a new type of foam separation tower with spiral components

[0085] It is pointed out that the inner diameter of the spiral foam separation tower 7 is 50 mm, the height is 1200 mm, the ratio of the pitch h of its components to the diameter d of the components is 1.6, the pitch is 80 mm, and the inclination angle is 50 °, and others are the same as those in Example 1. first step;

[0086] The second step, the foam separation system

[0087] Choose biological and non-biological mixed surfactants soy protein and SDS;

[0088] The third step, foam separation surfactant soybean protein and SDS process

[0089] 1. Prepare surfactant soybean protein and SDS solution

[0090] A surfactant solution containing soybean protein and SDS is selected, wherein the concentration of soybean protein is 0.20-0.30 g / L; the concentration of SDS is 0.050-0.10 g / L.

[0091] 2. Adjust the pH value of the prepared surfactant soybean protein and SDS...

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Abstract

The invention relates to a technology for foam separation of different surfactants. The technology comprises the steps of: 1) preparing a surfactant solution; 2) adjusting the pH value of the prepared surfactant solution to 6.0-6.5 with 1mol/L of hydrochloric acid or 1mol/L of sodium hydroxide; 3) adding the pH value adjusted surfactant solution obtained in step 2) into a foam separation column equipped with a helical component, with a loading amount about 15%-35% of the total volume of the foam separation column; 4) controlling the separation temperature at 20-30DEG C, adjusting a flowmeter to set the superficial gas velocity at 1.7-5.1mm/s, guiding foams out of the tower top and collecting them till no foaming. The centrifugal force generated by the centrifugal drainage structure of the invention depends on automatic flow of the foam phase in the helical component, and has no need for rotation of an additional machine, so that the concentration ratio of different surfactants from foam separation can be substantially enhanced.

Description

Technical field: [0001] The invention belongs to the technical field of foam separation, and in particular relates to a process for foam separation of different surfactants. Background technique: [0002] Foam separation technology has been paid more and more attention by researchers because of its simple equipment, low investment, low energy consumption and no pollution. The so-called foam separation technology uses air bubbles as the separation medium to concentrate the surface active components in the solution by utilizing the difference in hydrophobicity of the separated components, resulting in the difference in the adsorption properties of the separated components at the gas-liquid two-phase interface. During the foam separation process, bubbles are generated in the liquid phase of the foam separation tower, and the bubbles flow upward along the axial direction, and the separated surface active components are adsorbed on the gas-liquid two-phase interface of the bubble...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D19/02
Inventor 吴兆亮杨全文李瑞
Owner HEBEI UNIV OF TECH
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