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Device and method for eliminating SO2 from gas with combined ultrasonic wave and hollow fiber containing soaked film

A technology for sulfur dioxide and gas removal, applied in chemical instruments and methods, separation methods, dispersed particle separation, etc., can solve the problems of decreased absorption, long absorption time, poor mass transfer effect, etc., to reduce the amount of production and unit efficiency. Improve and improve the effect of mass transfer efficiency

Inactive Publication Date: 2007-01-31
XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the traditional hollow fiber module absorbs sulfur dioxide in the gas, there will be a problem of absorption decline after a certain period of time. The absorption time is too long, the absorption efficiency is poor, and the overall mass transfer effect is not good. The problem with fluid absorption

Method used

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  • Device and method for eliminating SO2 from gas with combined ultrasonic wave and hollow fiber containing soaked film
  • Device and method for eliminating SO2 from gas with combined ultrasonic wave and hollow fiber containing soaked film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] As shown in the figure, add 0.60M citrate solution from the liquid inlet (7) into the shell side of the hollow fiber membrane module (3), and the gas with a sulfur dioxide content of 5000 ppm enters the hollow fiber membrane through the gas inlet (6) In the tube side of component (3); under the action of 20KHz ultrasound, the absorption temperature is 25℃, and the unit ultrasonic power of the absorption liquid is 50W, which can keep the concentration of sulfur dioxide in the gas below 5ppm within 10-200 hours; citric acid after absorption The salt solution is used for the production and recycling of high-concentration sulfur dioxide; the treated gas is discharged from the gas outlet (5), and the treated citrate solution is discharged from the liquid outlet (4) to produce high-concentration sulfur dioxide and re-absorption .

Embodiment 2

[0026] The solution concentration, liquid film formation process and gas-liquid exchange method are basically the same as in Example 1.

[0027] Under the action of 40KHz ultrasound, the absorption temperature is 25℃, and the ultrasonic power per unit is 40W. It can keep the concentration of sulfur dioxide in the gas below 10ppm within 5-150 hours; the absorbed citrate solution is used for the production of high-concentration sulfur dioxide And cyclic absorption.

Embodiment 3

[0029] The solution concentration, liquid film formation process and gas-liquid exchange method are basically the same as in Example 1.

[0030] Under the action of 60KHz ultrasound, the absorption temperature is 25℃, and the unit ultrasonic power of the absorption liquid is 60W. It can keep the concentration of sulfur dioxide in the gas below 20ppm within 10-300 hours; the absorbed citrate solution is used for the production of high-concentration sulfur dioxide And cyclic absorption.

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Abstract

The present invention discloses device and method for eliminating SO2 from gas with combined ultrasonic wave and hollow fiber containing soaked film. The device has hollow fiber assembly, sandwiched jacket around the assembly, ultrasonic transducers set longitudinally along the sandwiched jacket and arranged in an array with interval of 0-100 mm. The method includes absorbing SO2-containing gas with hollow fiber containing citric acid solution soaked film, preparing high concentration SO2 gas with the absorbed citric acid solution, and the reuse of the citric acid solution. Compared with conventional technology, the present invention has the features of great absorption depth and high SO2 eliminating rate.

Description

Technical field [0001] The invention relates to a device for removing sulfur dioxide from gas, in particular to a device for removing sulfur dioxide from gas by combining ultrasonic waves and hollow fiber impregnated liquid membranes. The invention also relates to a method for implementing the device. Background technique [0002] Sulfur dioxide is a harmful gas, especially low-concentration sulfur dioxide is an exhaust gas that is difficult to effectively treat. In order to treat such environmentally polluting waste gas, the methods usually used are alkaline absorption method and ion beam method, but both of these methods have disadvantages such as high treatment cost, ineffective treatment of subsequent products, and waste residue. The use of citrate solution can effectively absorb the gas containing sulfur dioxide, and some methods can be used to separate the sulfur dioxide dissolved in the solution, and finally high-concentration sulfur dioxide is sold as a product. [0003] ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D53/14B01D53/22
Inventor 薛娟琴洪涛王成刚李林波王召启李伟达朱军
Owner XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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