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A system and method for chemically cleaning ceramic membranes

A technology for chemical cleaning and ceramic membranes, applied in the field of chemical cleaning ceramic membrane systems, can solve the problems of secondary pollutants in cleaning fluids, secondary treatment of membrane cleaning fluids, and pollution of ceramic membranes, so as to reduce sludge discharge and save exposure. Gas cost, the effect of no cleaning fluid discharge

Inactive Publication Date: 2019-07-16
深圳市康源环境纳米科技有限公司 +1
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Problems solved by technology

[0006] In order to solve the problems of ceramic membrane pollution in the water treatment process, secondary pollutants produced by the cleaning solution in the membrane cleaning process, and secondary treatment of the membrane cleaning solution, the present invention proposes a system and method for chemically cleaning the ceramic membrane to realize ceramic membrane cleaning. The liquid has no secondary pollution and does not require secondary treatment

Method used

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  • A system and method for chemically cleaning ceramic membranes
  • A system and method for chemically cleaning ceramic membranes

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example 1

[0059] Application of Flat Ceramic Membrane in Sewage Treatment A 2 O process for aerobic biological treatment. Membrane tank sludge concentration MLSS=5g / L, membrane filtration critical flux is 30LMH, start the membrane tank suction system with subcritical flux 20LMH for constant flux stable operation, when the transmembrane pressure difference (TMP) increases to 30- At 35kPa, stop the suction and start the online cleaning system. The results of many experiments show that after a certain amount of H 2 o 2 After online cleaning, the recovery rate of the transmembrane pressure difference of the ceramic flat membrane is not less than 93%. The specific test results are shown in Table 1 below.

[0060] Table 1H 2 o 2 On-line cleaning of flat ceramic membrane test results

[0061] Test No. ΔTMP before washing (kPa) After washing ΔTMP(kPa) TMP recovery rate (%) 1 32.6 2.10 93.55 2 31.4 1.66 94.71 3 33.5 1.95 94.17

example 2

[0063] Under the same test conditions, the polluted ceramic diaphragm was subjected to H 2 o 2 Off-line soaking and cleaning, the results of multiple tests show that after a certain amount of H 2 o 2 After off-line immersion, the recovery rate of the transmembrane pressure difference of the ceramic flat membrane is not less than 98%. The specific test results are shown in Table 2 below.

[0064] Table 2H 2 o 2 Test effect of off-line immersion cleaning flat ceramic membrane

[0065] Test No. ΔTMP before washing (kPa) After washing ΔTMP(kPa) TMP recovery rate (%) 1 35.4 0.43 98.78 2 34.2 0.40 98.83 3 34.7 0.38 98.90

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Abstract

The invention relates to a ceramic membrane chemical cleaning system and method which are used for cleaning a ceramic membrane in a water treatment system. The chemical cleaning system comprises an online cleaning part, wherein the online cleaning part comprises a dosing pump and a sucking pump; the dosing pump is coupled onto the ceramic membrane arranged in a membrane pool by virtue of a pipeline, so as to inject a cleaning liquid into the ceramic membrane; the sucking pump is coupled onto the ceramic membrane by virtue of a pipeline, so as to discharge water from a back absorption membrane of the ceramic membrane; and the cleaning liquid on the ceramic membrane is discharged into the membrane pool in a sucking process. The system and method which are provided by the invention can be used for solving the problems of pollution of the ceramic membrane in a water treatment process, production of secondary pollutants by the cleaning liquid in a membrane cleaning process, secondary treatment of the membrane cleaning liquid, and the like.

Description

technical field [0001] The invention relates to a system and method for chemically cleaning ceramic membranes, which are suitable for cleaning organic pollution of flat ceramic membranes in water and sewage treatment (hereinafter referred to as water treatment) systems. Background technique [0002] With the acceleration of urbanization, the standard of water treatment is increasing day by day, and conventional treatment technology methods can no longer effectively meet the requirements of relevant water quality standards. For this reason, membrane bioreactor (MBR) has been more and more widely used, effectively combining biological treatment technology and membrane separation technology to form a new integrated sewage treatment system, which has high water treatment efficiency, good effluent quality, and muddy water. High separation rate, small footprint, strong construction feasibility and other advantages. [0003] Membrane has become the core technology of water treatme...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F3/12B01D65/02
CPCB01D65/02B01D2321/04B01D2321/16C02F3/1268C02F2303/14Y02W10/10
Inventor 张锡辉唐升引张正华苏子杰
Owner 深圳市康源环境纳米科技有限公司
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