Sewage treatment device capable of improving performance of membrane filtration system and operation method of sewage treatment device

A technology of sewage treatment device and system performance, applied in water/sewage treatment, water/sludge/sewage treatment, permeation/dialysis water/sewage treatment, etc. Low efficiency and other problems, to achieve the effect of reducing the floor space and weight of the plant, removing membrane pollution, and optimizing storage space

Pending Publication Date: 2018-03-23
HENAN NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problems of large floor area, serious membrane pollution, low filtration efficiency and waste of water resources in the existing filtration system, and provide a sewage treatment device and its operation method to improve the performance of the membrane filtration system, which effectively reduces the The Economic Cost of Wastewater Treatment

Method used

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  • Sewage treatment device capable of improving performance of membrane filtration system and operation method of sewage treatment device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] 当含有包括500mg / L的SO 4 2- 和1000mg / L的总溶解固体含盐量的进水废液通过该膜过滤系统时,采用长度为4.7m的玻璃钢材质的压力容器内,依次串联有一级UF预处理膜元件和三支NF膜元件,进水料液分别通过三支并联排列的压力容器的第一级UF膜元件预处理后,产水SDI 5 为2.1,浊度为0.01NTU,预处理后的UF产水直接进入同一压力容器内第二级的NF膜元件,用于有效去除给水中的各种潜在污染离子,含有低盐浓度的第二级NF膜产水(出水中有25mg / L的SO 4 2- 或400mg / L的总溶解固体含盐量)通过产水口排出;相对应地,含有高盐浓度NF膜浓水从浓水口排出。与现有同规格排列的UF膜压力容器和串联后的三级NF膜元件压力容器所组成的膜过滤系统装置相比,本发明所采用的单压力容器中串联有UF膜元件和NF膜元件两个不同类型的过滤单元,有效占地面积和装置质量分别下降47%和28%左右。随着实验运行时间的增加,当跨UF膜压差传感器在线监测到第一支压力容器内UF膜元件两端压差≥0.15MPa时,系统停止第一支压力容器内膜过滤系统的造水程序,启动该压力容器内UF膜元件的反冲洗步骤,反冲洗水流来自第二支和第三支压力容器内UF膜元件的部分产水。反冲洗结束后,通过位于压力容器进口端的定向控制阀用来再次启动正常造水步骤,系统中采用的能量回收装置,将NF浓水中31.5%的能量二次利用用于提升相同膜元件的进水压力。由于第二段NF膜组件的使用,膜过滤系统产水回收率显著增加。

Embodiment 2

[0024] 当含有包括3000mg / L的SO 4 2- 和45000mg / L的总溶解固体含盐量的进水废液通过该膜过滤系统时,采用长度为4.7m的玻璃钢材质的压力容器内,依次串联有一级MF预处理膜元件和三支RO膜元件,进水分别通过三支并联排列的压力容器的第一级MF膜元件预处理后,产水SDI 5 为2.8,浊度为0.01NTU,预处理后的MF膜产水直接进入同一压力容器内第二级的RO膜元件,用于有效去除给水中的各种潜在污染离子,含有低盐浓度的第二级RO膜产水(出水中有40mg / L的SO 4 2- 或800mg / L的总溶解固体含盐量)通过产水口排出;相对应地,含有高盐浓度RO膜浓水从浓水口排出。与现有同规格排列的MF膜压力容器和串联后的三级RO膜压力容器所组成的膜过滤系统装置相比,本发明所采用的单压力容器中串联有MF膜元件和RO膜元件两个不同类型的过滤单元,有效占地面积和装置质量分别下降35%和22%左右。随着实验运行时间的增加,当跨UF膜压差传感器在线监测到第一支压力容器内MF膜元件两端压差≥0.15MPa时,系统停止第一支压力容器内膜过滤系统的造水程序,启动该压力容器内MF膜元件的反冲洗步骤,反冲洗水流来自第二支和第三支压力容器内MF膜元件的部分产水。反冲洗结束后,通过位于压力容器进口端的定向控制阀用来再次启动正常造水步骤,系统中采用的能量回收装置,将RO浓水中92.4%的能量二次利用用于提升相同膜元件的进水压力。

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Abstract

The invention discloses a sewage treatment device capable of improving performance of a membrane filtration system and an operation method of the sewage treatment device and belongs to the technical field of waste water treatment processes and devices. At least two filtering units (pretreatment microfiltration (MF) or ultrafiltration (UF)+membrane nanofiltration (NF) or reverse osmosis (RO)) are connected in series with the interior of each pressure vessel, and the required pressure vessels are connected in series or in parallel. Through the technology, MF / UF membrane elements can be regenerated, the occupied area of a filtering system is reduced, membrane contamination is relieved, and economic benefits are improved.

Description

technical field [0001] The invention belongs to the technical field of wastewater treatment technology and devices, and in particular relates to a sewage treatment device and an operating method thereof for improving the performance of a membrane filtration system. Background technique [0002] my country is a country with severe drought and water shortage. At the same time, the groundwater body suffers from a certain degree of point and surface pollution, and there is a trend of increasing year by year. Worsening water pollution not only reduces the use function of water bodies, further exacerbates the contradiction of water shortage, but also threatens people's drinking water safety and health. Therefore, some new water supply filtration technologies, including membrane technology, are increasingly showing their importance in daily life. As a new separation technology, membrane technology has been widely used in the fields of gas separation, material separation and water ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D61/02B01D61/14B01D61/58B01D65/02C02F1/44
CPCB01D61/58B01D65/02C02F1/441C02F1/442C02F1/444B01D61/146B01D61/026
Inventor 李铁梅宋跃飞秦文博户启华张小转樊静
Owner HENAN NORMAL UNIV
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