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High frequency pulse method for vacuum membrane distillation regeneration

A technology of vacuum membrane distillation and high-frequency pulse, which is applied in the direction of separation methods, chemical instruments and methods, and total evaporation, etc., to achieve the effects of increasing service life, improving separation efficiency, and increasing driving force

Active Publication Date: 2015-01-21
BC P INC CHINA NAT PETROLEUM CORP +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] There is no technical solution for using high-frequency pulses for vacuum membrane distillation regeneration in the prior art

Method used

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  • High frequency pulse method for vacuum membrane distillation regeneration
  • High frequency pulse method for vacuum membrane distillation regeneration
  • High frequency pulse method for vacuum membrane distillation regeneration

Examples

Experimental program
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Effect test

Embodiment 1

[0023] Embodiment 1: as figure 1 Shown, a kind of high-frequency pulse is used for vacuum membrane distillation regeneration method, contains following steps;

[0024] After the power supply is connected to 220V AC with a frequency of 50Hz, the output voltage is 1KV ~ 10KV, and the frequency is 1.31KHz ~ 8KHz high-frequency pulse signal after conversion by the step-up transformer. The high-frequency pulse signal is inserted into the solution inlet of the membrane module. The outlet of the solution is connected to the high-frequency pulse electrode at the inlet through a wire. The high-frequency pulse causes the pressure in the solution of the device to change rapidly, and the gas in the solution and a large number of bubbles generated by the pressure change occur frequently in a very short period of time. The eruption and collapse of bubbles, the eruption and collapse of bubbles will generate strong shock waves, which will cause the local temperature and pressure in the soluti...

Embodiment 2

[0035] Embodiment 2: as figure 1 Shown, a kind of high-frequency pulse is used for vacuum membrane distillation regeneration method, contains following steps;

[0036] The MDEA-rich solution that needs to be regenerated is heated to the experimental temperature by the heating tank and delivered to the membrane module. The AC power supply device outputs a high-frequency pulse signal after being converted by a step-up transformer. The pulse signal causes the pressure in the solution to change sharply, and the gas in the solution The large number of bubbles produced by itself due to pressure changes will frequently erupt and collapse in a very short period of time. The eruption and collapse of the bubbles will generate a strong shock wave, which will cause the local temperature and pressure in the solution to rise sharply. The local temperature and Changes in pressure lead to intensified solution oscillations, increased membrane permeability, and full contact between the solution...

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Abstract

A high frequency pulse method for vacuum membrane distillation regeneration belongs to the technical field of vacuum membrane distillation. 220V alternating current with frequency of 50Hz is accessed into power, and is converted by a step-up transformer to output high frequency pulse signal with voltage of 1KV-10KV and frequency of 1.31KHz-8KHz; the high frequency pulse signal is inserted into a solution inlet of a membrane component, and the solution outlet of the membrane component is connected with the high frequency pulse at the inlet through a wire; the high frequency pulse makes the pressure in the device solution changes sharply, gas in the solution and the solution due to pressure change produce a large number of bubbles, and bubbles frequently outbreak and collapse in a very short time to generate strong shock wave, so that the local temperature and pressure in the solution increase rapidly, and the local change of temperature and pressure in the solution lead to intensified vibration of the solution; and through the control of pulse frequency and duty ratio (ratio of pulse output time to pulse cycle), the high frequency pulse is formed for membrane distillation desulfurization.

Description

technical field [0001] The invention relates to a high-frequency pulse used for vacuum membrane distillation regeneration method, which belongs to the technical field of vacuum membrane distillation. Background technique [0002] Application number 201010034385.5 is a method of applying spiral membrane modules to vacuum membrane distillation. The hydrophobic horizontal membrane and some auxiliary materials are arranged in a three-layer structure of coarse mesh, diaphragm and fine mesh according to the direction of steam flow. The spiral membrane module is made by winding on the central tube with small holes, and the area where the fine mesh directly contacts with the membrane adopts a regularly arranged strip-shaped pore structure; while rolling, each part is carried out according to the requirements of the vacuum operation process. Sealing and bonding; and according to the structural characteristics of the components, the membrane shell is made, and the components are place...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D61/36B01D53/14
Inventor 赵会军邵悦周诗岽李恩田赵书华梅磊
Owner BC P INC CHINA NAT PETROLEUM CORP
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