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Micro flocculation, membrane filtration and air flotation integrated reaction device and method for treating low-turbidity micro-polluted water by using same

A reaction device, a technology for micro-polluted water, applied in chemical instruments and methods, multi-stage water/sewage treatment, water/sludge/sewage treatment, etc., can solve problems such as the need for regular discharge of concentrated liquid, and improve impact resistance. , reducing the effect of deposition

Inactive Publication Date: 2011-05-18
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The present invention aims to solve the problem that the existing micro-flocculation and submerged ultrafiltration / microfiltration membrane process needs to regularly discharge the concentrated liquid in the reaction tank, and provides a micro-flocculation, membrane filtration and air flotation integrated reaction device and its low processing cost. Methods of turbid and slightly polluted water

Method used

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  • Micro flocculation, membrane filtration and air flotation integrated reaction device and method for treating low-turbidity micro-polluted water by using same
  • Micro flocculation, membrane filtration and air flotation integrated reaction device and method for treating low-turbidity micro-polluted water by using same
  • Micro flocculation, membrane filtration and air flotation integrated reaction device and method for treating low-turbidity micro-polluted water by using same

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specific Embodiment approach 1

[0010] Specific implementation mode one: (see attached figure 1 ) The microflocculation, membrane filtration and air flotation integrated reaction device of this embodiment includes a flocculation, membrane filtration and air flotation integrated reaction tank 15, a water storage tank 6, a peristaltic pump 7, an air compressor 8, a dissolved air pump 9 and a flotation The slag tank 10, the integrated reaction tank of flocculation, membrane filtration and air flotation is composed of a mechanical micro-flocculation zone 1, a transition zone 2 and a membrane filtration-air flotation zone 3, and there is a weir between the mechanical micro-flocculation zone 1 and the transition zone 2 Plate 4 is separated, transition zone 2 and membrane filtration-air flotation zone 3 are separated by perforated flower wall 5, mechanical microflocculation zone 1 is equipped with mechanical stirring 1-1, and membrane filtration-air flotation zone 3 is equipped with ultrafiltration / microfiltration m...

specific Embodiment approach 2

[0013] Specific embodiment two: The method for processing low-turbidity and slightly polluted water with micro-flocculation, membrane filtration and air flotation integrated reaction device of this embodiment is carried out according to the following steps: low-turbidity and slightly-polluted water is passed into the flocculation, membrane The mechanical micro-flocculation zone 1 of the integrated filtration and air flotation reaction tank 15, after mechanical flocculation, overflows from the weir plate 4 into the transition zone 2, and then enters the membrane filtration-air flotation zone 3 through the perforated flower wall 5, and then enters the membrane filtration-air flotation zone 3 through the ultrafiltration Process under the condition that the microfiltration membrane module 3-1 and the dissolved air pump 9 work simultaneously, wherein the flux of the ultrafiltration / microfiltration membrane module 3-1 is 80L / (m 2 h)~120L / (m 2 h), the operating pressure is 0.7bar~1.0...

specific Embodiment approach 3

[0016] Specific embodiment three: the difference between this embodiment and specific embodiment two is: mechanical microflocculation is to add polyaluminum chloride flocculant, the dosage of polyaluminum chloride flocculant is 30mg / L~45mg / L, hydraulic retention The time is 20 minutes to 25 minutes. Others are the same as in the second embodiment.

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Abstract

The invention discloses a micro flocculation, membrane filtration and air flotation integrated reaction device and a method for treating low-turbidity micro-polluted water by using the same, relating to a water treatment device and a method for treating low-turbidity micro-polluted water by using the same. Through the invention, the problem that the concentrated solution in the reaction pools needs to be discharged periodically in the traditional micro flocculation and immersed ultra / micro filtration membrane processes is solved. The device comprises a micro flocculation, membrane filtration and air flotation integrated reaction tank which consists of a mechanical micro flocculation area, a transition area and a membrane filtration-air flotation area, wherein an ultra / micro filtration membrane is arranged in the membrane filtration-air flotation area; and a releaser is arranged at the bottom of the membrane filtration-air flotation area and communicated with a water storage tank through a dissolved-air pump. The method comprises the steps: the low-turbidity micro-polluted water is flocculated and enters the membrane filtration-air flotation area; and then an ultra-micro filtration membrane assembly works together with the dissolved-air pump to complete the water treatment; or the ultra-micro filtration membrane assembly works firstly and then the dissolved-air pump works to complete the water treatment. By means of the invention, the in-situ purification of the concentrated solution is realized and the floor area is saved.

Description

technical field [0001] The invention relates to a water treatment device and a method for treating low-turbidity slightly polluted water. Background technique [0002] In the water treatment industry, due to the continuous improvement of people's requirements for water quality and the substantial reduction of membrane production costs, the fourth-generation water treatment process - membrane treatment technology has been more and more widely used due to its unique advantages. Among them, the driving force of submerged ultrafiltration / microfiltration membrane filtration is the pressure difference between the vacuum inside the membrane tube and the atmospheric pressure, which has the advantages of low operating pressure, low operating cost, convenient membrane backwashing and low membrane pollution. Therefore, Submerged tubular ultrafiltration / microfiltration membrane treatment technology has become a representative of the development of membrane treatment technology for drink...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/04
Inventor 马军邹景朱君涛
Owner HARBIN INST OF TECH
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