A method for vacuum defoaming of high-viscosity liquids by using pressure difference and pneumatic force generated by gas contained in the liquid

A technology of vacuum degassing and pressure difference, applied in liquid degassing, chemical instruments and methods, separation methods, etc., can solve problems such as the limitation of degassing speed and increase the complexity of degassing devices, and achieve easy and efficient degassing. , The system is simple and effective

Active Publication Date: 2022-05-06
悉瑞绿色电气(苏州)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, if the liquid is very viscous and the bubbles are very small, it is often used to manually cut the liquid under vacuum conditions or even add power mechanical agitation to defoam, so that the volume of the bubbles increases as much as possible to expose the liquid surface and prolong the rupture time. This needs to be done in a vacuum box. The power device is placed inside, which increases the complexity of the degassing device, and the degassing speed is also limited

Method used

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  • A method for vacuum defoaming of high-viscosity liquids by using pressure difference and pneumatic force generated by gas contained in the liquid
  • A method for vacuum defoaming of high-viscosity liquids by using pressure difference and pneumatic force generated by gas contained in the liquid

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Effect test

Embodiment 1

[0021] Such as figure 1 As shown, a liquid vacuum degassing system includes a hopper 1 and a vacuum box 2, and is characterized in that: a degassing container 3 is arranged in the vacuum box, and the degassing container is divided into a small chamber 4 and a large chamber 5, and the small chamber 4 Located on the top of one side of the degassing container, the top of the small chamber 4 is connected to the hopper 1 through the feeding pipeline 6, the position of the hopper is higher than the top of the small chamber, and a valve 7 is also arranged on the feeding pipeline, and the bottom of the small chamber is passed through a sieve-shaped partition 8 communicates with the large chamber of the degassing container; the degassing container is provided with a suction port 9 at the top of the other side away from the small chamber, and an overflow port 10 is provided at the upper part of the container on this side, and the position of the overflow port is lower than the sieve-shap...

Embodiment 2

[0026] This embodiment is basically the same as Embodiment 1, except that the hopper is a sealed container provided with a pressurizing device.

Embodiment 3

[0028] The insulating material for transformer casting is composed of two components ZS-GF-5299WA and B. It needs to be fully stirred and mixed before pouring to form a stock solution with a viscosity of about 80,000 cps. A large amount of air bubbles are mixed during the stirring process, and defoaming is required before pouring. The hopper is open, and the raw liquid slurry is pressed into the small chamber of the liquid vacuum degassing device through the manual valve by atmospheric pressure. There are 6 strip screen holes with a length of 20mm and a width of 3mm on the partition of the small chamber. The air suction port on the top is about 400mm away from the small chamber, and the overflow port is about 20mm away from the top. The maximum vacuum degree of the vacuum box is 100Pa. After vacuuming to close to 100Pa, open the valve to allow the raw liquid to enter automatically, and monitor the overflow of the overflow port. After about 15 minutes, the overflow port began ...

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Abstract

The invention discloses a method for vacuum defoaming of high-viscosity liquid by using the pressure difference and the pneumatic force generated by the gas contained in the liquid. A set of system is designed: a hopper is arranged outside the vacuum box, and a degassing container is arranged inside the vacuum box; the hopper passes through The bottom control valve and feeding pipe are closed and connected with the feed inlet and the cutting chamber on the top side of the degassing container in the vacuum box. The suction port at the top of the side and the overflow port at the middle of the side communicate with the vacuum box, and the position of the overflow port is lower than the sieve partition. When working, the vacuum box is evacuated, the valve is opened, the raw liquid in the hopper flows through the small chamber and the large chamber under the action of pressure, and the degassing is completed under the action of pneumatic force. In the present invention, no additional power device is needed, and the whole device is simple and effective. The method is proved to be effective by the practical operation of defoaming liquids with viscosities ranging from 50,000 to 120,000 cps.

Description

technical field [0001] The invention relates to a method for vacuum defoaming of high-viscosity liquid by utilizing the pressure difference and the pneumatic force generated by the gas contained in the liquid. Background technique [0002] After the liquid is stirred rapidly in the atmosphere, many air bubbles will be wrapped inside the liquid. When the viscosity is very low, the bubbles contained in the liquid in the container rely on their own buoyancy to float to the surface of the liquid. When the surface tension is not high, the bubbles burst, the gas diffuses to the environment, and the liquid sinks and gathers at the bottom of the container. So as to realize the automatic defoaming of the liquid. However, if the liquid has a high viscosity or a high surface tension, manual degassing is required. [0003] The simplest way is to adopt the vacuum static defoaming method, put the liquid containing gas in a container and put it into a vacuum box. After vacuuming, the int...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D19/00
CPCB01D19/0036
Inventor 吴济安
Owner 悉瑞绿色电气(苏州)有限公司
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