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Porous medium defoamer

A porous medium and defoamer technology, applied in the direction of foam dispersion/prevention, can solve the problems of complex operation, high equipment requirements, high energy consumption, etc., and achieve the effect of low energy consumption, convenient operation, and improved defoaming efficiency

Active Publication Date: 2015-01-07
HEBEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above-mentioned patents all use force to apply external force to shear or rub the foam for defoaming. These devices are complex in operation, high in energy consumption and have high requirements on equipment.

Method used

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  • Porous medium defoamer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] The material system used is an aqueous solution of sodium lauryl sulfate, the liquid hold-up rate of the formed foam is 1%, the half-life of the foam is 30min (measured by GB / T7462-94) and the superficial flow velocity of the foam is 3.5mm / s, and the foam consists of a foam The inlet pipe enters the defoamer, and the foam flows from bottom to top. The cylinder height-to-diameter ratio of the porous medium defoamer is 1, the porous medium column height-to-diameter ratio is 10, and the number of porous medium columns placed on the unit cross-sectional area of ​​the cylinder is 40 / m 2 , and arranged in an equilateral triangle, the density of polyurethane foam is 45kg / m 3 And the pore diameter is 300um, and the distance from the bottom edge of the foam inlet pipe to the bottom cover is 100mm.

[0023] Under the same system conditions, an empty cylinder without components of the same size is used as the defoamer. After 6 minutes, the foam overflows the defoamer; a stirring ...

Embodiment 2

[0025] The substance used is an aqueous solution of sodium lauryl sulfate, the liquid hold-up rate of the formed foam is 3%, the half-life of the foam is 60min (measured by GB / T7462-94) and the superficial flow velocity of the foam is 7mm / s, and the foam enters from the foam The pipe enters the defoamer, and the foam flows from bottom to top. The cylinder height-to-diameter ratio of the porous medium defoamer is 5, the porous medium column height-to-diameter ratio is 50, and the number of porous medium columns placed on the unit cross-sectional area of ​​the cylinder is 200 / m 2 , and arranged in an equilateral triangle, the density of polyurethane foam is 45kg / m 3 And the pore diameter is 300um, the distance from the bottom edge of the foam inlet pipe to the bottom cover is 200mm.

[0026] Under the same system conditions, an empty cylinder without components of the same size is used as a defoamer. After 5 minutes, the foam overflows the defoamer; a stirring defoamer with a r...

Embodiment 3

[0028] The material system used is sodium lauryl sulfate aqueous solution, the liquid hold-up rate of the formed foam is 5%, the half-life of the foam is 120min (measured by GB / T7462-94) and the superficial flow velocity of the foam is 10mm / s, and the foam enters from the foam The pipe enters the defoamer, and the foam flows from bottom to top. The cylinder height-to-diameter ratio of the porous medium defoamer is 10, the porous medium column height-to-diameter ratio is 80, and the number of porous medium columns placed on the unit cross-sectional area of ​​the cylinder is 1200 / m 2 , and arranged in an equilateral triangle, the density of polyurethane foam is 45kg / m 3 And the pore diameter is 300um, the distance from the bottom edge of the foam inlet pipe to the bottom cover is 300mm.

[0029] Under the same system conditions, an empty cylinder without components of the same size is used as the defoamer. After 4 minutes, the foam overflows the defoamer; a stirring defoamer wi...

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Abstract

The invention discloses a porous medium defoamer which comprises a liquid draining pipe, a foam feeding pipe, a bottom cover, a porous medium column, a cylinder body, a top cover and an exhaust opening, wherein the cylinder body is main body equipment of the porous medium defoamer; the top cover is mounted at the top of the cylinder body; exhaust holes are formed in the top cover; the bottom cover is mounted at the bottom of the cylinder body; the liquid draining pipe is arranged at the lower part of the bottom cover; the foam feeding pipe is arranged at the lower part of the cylinder body; the porous medium column is vertically arranged on the cylinder body; the upper part of the porous medium column is fixed to the top cover; the lower part of the porous medium column is fixed to the bottom cover; the porous medium column is made of polyurethane foam plastic. According to the porous medium defoamer disclosed by the invention, continuous defoaming can be realized; the half-life period (measured by GB / T7462-94) of the eliminable foam is shorter than 120 minutes; the liquid holdup of foam is 1-5 percent; the apparent velocity of the foam is 3-10mm / s. The porous medium defoamer disclosed by the invention has the advantages of remarkable defoaming effect, no need of adding any external force during operation, simple structure, convenience in operation and low energy consumption.

Description

technical field [0001] The technical scheme of the present invention is to develop a new defoamer technology based on the capillary principle, which belongs to the field of chemical industry, and specifically uses foam plastics as components to make a porous medium defoamer. Background technique [0002] A large amount of foam is currently generated in many industrial processes. If these large amounts of foam are not eliminated in time, it will not only cause a decline in production capacity, but also affect the progress of the production process, and even be discharged into the environment to cause serious environmental pollution. Therefore, defoaming is an important unit operation in the industrial production process. [0003] The commonly used defoaming methods include chemical defoaming method and physical defoaming method. The chemical defoaming method is to add a defoaming agent to the foam. This method has a good defoaming effect, but it will cause pollution during ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D19/02
Inventor 吴兆亮康淑芳刘桂敏
Owner HEBEI UNIV OF TECH
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