Cleaning agent, method and device for tubular membrane

A cleaning device, tubular membrane technology, applied in chemical instruments and methods, membrane technology, semi-permeable membrane separation, etc. Effect

Inactive Publication Date: 2013-09-11
NINGXIA QIYUAN PHARMA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the prior art, ordinary aqueous solution is used to clean the membrane. This method is relatively easy to clean the membrane surface contamination, but it is more difficult to clean the membrane pore clogging, mainly because the cleaning solution is easy to cause the membrane pore clogging. Short circuit, can't dissolve the wetness and dissolve the membrane pore blockage well

Method used

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  • Cleaning agent, method and device for tubular membrane

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Experimental program
Comparison scheme
Effect test

Embodiment １

[0026] The metal membrane that has been used for 3 years is used for cleaning experiments. The flux of the membrane tube has been attenuated by 20%, and the membrane flux is 40L / m 2 .hr, ordinary aqueous solution circulation cleaning has no obvious effect, and the device and cleaning method of the present invention are used for cleaning. First rinse the membrane tube with pure water, empty the water in the membrane tube, install a heating device and a temperature control device, prepare a methanol solution of 2% ammonia water, turn on the circulation pump, adjust the frequency to control the flow rate of the cleaning solution to about 2m / S, and open the membrane tube Heating device, the temperature is set at 65°C, the heating rate is 2°C / min, the timing starts when the temperature rises to 65°C, and the cleaning time ends at 45 minutes. Empty the lye in the membrane tube, rinse the membrane tube with pure water to neutral, then drain the water in the membrane tube, prepare a m...

Embodiment 2

[0028] The metal membrane that has been used for 3 years is used for cleaning experiments. The flux of the membrane tube has been attenuated by 20%, and the membrane flux is 40L / m 2 .hr, ordinary aqueous solution circulation cleaning has no obvious effect, and the device and cleaning method of the present invention are used for cleaning. First rinse the membrane tube with pure water, empty the water in the membrane tube, install a heating device and a temperature control device, prepare a 1% NaOH ethanol solution, turn on the circulation pump, adjust the frequency to control the flow rate of the cleaning solution to about 2m / S, and open the membrane tube Heating device, the temperature is set at 80°C, the heating rate is 5°C / min, the timing starts when the temperature rises to 80°C, and the cleaning time ends at 60 minutes. Drain the lye in the membrane tube, rinse the membrane tube with pure water to neutral, then drain the water in the membrane tube, prepare 1% ethanol solut...

Embodiment 3

[0030] The metal membrane that has been used for 3 years is used for cleaning experiments. The flux of the membrane tube has been attenuated by 20%, and the membrane flux is 40L / m 2 .hr, ordinary aqueous solution circulation cleaning has no obvious effect, and the device and cleaning method of the present invention are used for cleaning. First rinse the membrane tube with pure water, empty the water in the membrane tube, install a heating device and a temperature control device, prepare a 2% triethanolamine propanol solution, turn on the circulation pump, adjust the frequency to control the flow rate of the cleaning solution to about 2m / S, and turn on For the membrane tube heating device, the temperature is set at 90°C, the heating rate is 6°C / min, the timing starts when the temperature rises to 90°C, and the cleaning time ends at 60 minutes. Drain the lye in the membrane tube, rinse the membrane tube with pure water to neutral, then drain the water in the membrane tube, prepa...

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Abstract

The invention relates to a cleaning agent, method and device for a tubular membrane. The cleaning agent is an acid solution or an alkaline solution prepared by taking alcohols C1-C4 as a solvent and acid or alkali as a solute. The alcohols C1-C4 with good solubility are adopted as the solvent of the cleaning agent, acid, alkali, a surfactant or a complexing agent and the like are adopted as the solute, and a heating mode is adopted, so that stemming in holes of the membrane is washed out in a cleaning process like micro blasting, the membrane flux is recovered, and the service life of the membrane is prolonged.

Description

technical field [0001] The invention relates to the technical field of using membrane equipment, in particular to a cleaning agent, a cleaning method and a cleaning device for a tubular membrane. Background technique [0002] Membrane equipment is a new type of high-efficiency separation equipment, widely used in petrochemical, medical and health, biochemistry, food, water treatment and other fields for solid-liquid and liquid-liquid separation. During the membrane separation process, pollutants will be adsorbed on the surface of the membrane and in the pores of the membrane, which will reduce the permeability of the membrane and shorten its service life. At present, the service life of organic membranes does not exceed 3 years, and the service life of inorganic membranes does not exceed 5 years. Therefore, in actual use, the membrane needs to be cleaned frequently to improve its service life. [0003] In the prior art, ordinary aqueous solution is used to clean the membran...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D65/06
Inventor 王良马晓军李学兵
Owner NINGXIA QIYUAN PHARMA
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