Multi-stage submerged membrane separation device and membrane separation method

一种膜分离、浸渍型的技术，应用在半透膜分离、化学仪器和方法、膜等方向，能够解决膜面积限制等问题，达到减少频率、高过滤通量的效果

Inactive Publication Date: 2017-06-27
TORAY IND INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, the lowermost membrane unit is only cleaned at the central part of the membrane surface that is in contact with the gas-liquid mixed flow, and the pores in the membrane that are not in contact with the gas-liquid mixed flow are quickly blocked, so the effective membrane area is limited

Method used

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  • Multi-stage submerged membrane separation device and membrane separation method
  • Multi-stage submerged membrane separation device and membrane separation method
  • Multi-stage submerged membrane separation device and membrane separation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0127] In Example 1, by configuring figure 2 The setup shown uses membrane module 1 for experiments. The experiment was performed under controlled filtration flow of the membrane modules. A flow meter is provided for each of the upper and lower membrane units, and a pressure gauge, a flow control valve, a flow meter, and a filter pump are installed on the permeate piping installed after the permeate piping from the upper and lower membrane units is combined. Operation is first through the filter pump, then switched to flow control valve, and then the filter pump is stopped. Here, the filtration operation is performed by a filtration pump and a flow control valve, combined with a flow meter to keep the flow constant. Filtration flow is 168m 3 / d, repeat the filtration cycle with 9 minutes of filtration and 1 minute off. The filtration pressure difference was calculated by subtracting the filtration pressure 50 seconds after the end of the filtration from the filtration ope...

Embodiment 2

[0131] Experiments were performed in the same manner as in Example 1 except that membrane module 2 was used. The experimental results showed that, if Figure 6 As shown, the filtration pressure differences in the upper and lower membrane units were all lower than the upper filtration pressure difference upper limit (25 kPa) allowing stable filtration operation, and were considered to be temporarily stable even at high filtration fluxes.

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Abstract

The present invention provides an immersion-type membrane separation apparatus and a membrane separation method capable of coping with a temporary increase in processing flow rate by utilizing the filtration capacity of a separation membrane, a constituent element of the apparatus. In the immersion type separation device, a membrane module is included, and the membrane module has a stacked membrane unit, and a flat sheet membrane element with a separation membrane is arranged in the membrane unit. The membrane unit with the highest filtration resistance or the highest pure water permeation resistance is placed in the membrane The lowermost section of the module, thus setting a high temporary filtration flux for the overall membrane module. This makes it possible to cope with short-term traffic increases.

Description

technical field [0001] The present invention relates to a multistage immersion type membrane separation device in which separation of water and sludge is carried out by using a filtration separation membrane in the case of purifying domestic sewage and industrial wastewater, and also relates to the use of this membrane separation Device for membrane separation methods. Background technique [0002] Regarding the method of purifying domestic sewage and industrial wastewater, a method of supplying enzymes to microorganisms in wastewater, a method of mixing water into activated sludge and then performing separation treatment (membrane bioreaction method, MBR method for short), etc. . In the membrane bioreaction method of separating activated sludge into solid and liquid by using separation membranes each having a plurality of pores, the activated sludge is filtered while the surface of the separation membrane is generated by aeration in the vertical direction from below the se...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D63/08B01D65/02C02F1/44
CPCC02F1/44B01D61/18B01D2315/06B01D63/082B01D2313/26B01D2317/02C02F3/1273Y02W10/10B01D63/0821B01D2311/14B01D2311/16C02F2209/03C02F2209/40C02F2303/20
Inventor 高畠宽生千智勋西尾彩
Owner TORAY IND INC
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