Ultrafiltration membrane pool with secondary on-line coagulation function

An ultrafiltration membrane and functional technology, applied in the field of ultrafiltration membrane pools, can solve the problems of uneven water inflow, high operating energy consumption, impacting membrane components across the membrane pressure difference, etc., achieve smooth sludge discharge, reduce operating energy consumption, The effect of reducing the transmembrane pressure difference

Active Publication Date: 2015-01-21
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention solves the problems of uneven water inflow, impacting membrane modules, large transmembrane pressure difference and high energy consumption in the existing ultrafiltration membrane pool, and further provides an ultrafiltration membrane pool with secondary online coagulation function

Method used

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  • Ultrafiltration membrane pool with secondary on-line coagulation function
  • Ultrafiltration membrane pool with secondary on-line coagulation function
  • Ultrafiltration membrane pool with secondary on-line coagulation function

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Experimental program
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Effect test

specific Embodiment approach 1

[0011] Specific implementation mode one: as Figure 1~3 As shown, the ultrafiltration membrane tank with secondary online coagulation function in this embodiment includes a main water inlet channel 10, a drainage channel 9, two energy dissipation weirs 12, two perforated grids 11, and two main pipe control valves 2. A plurality of membrane modules 5, a plurality of inclined plates 6, two main pipes 3 with water distribution holes and a plurality of liquid level control valves 13; the main water inlet channel 10 and the drainage channel 9 are located on the side wall of the membrane tank, and the The main water channel 10 is arranged above the drainage channel 9 and both are arranged horizontally. A plurality of membrane modules 5 are sequentially arranged in the membrane pool along the length direction, and a plurality of inclined plates 6 are arranged below the membrane modules 5. Arranged parallel to each other, the sludge area 7 is located under the plurality of inclined pl...

Embodiment

[0013] The raw water quality of a source water in the Pearl River after coagulation and sedimentation is as follows: turbidity is 4.28-4.92NTU, temperature is 30.8-31.5°C, pH value is 7.3-7.48, COD Mn 0.81-0.95mg / L, UV 254 0.015-0.019cm -1 , the optimal coagulant dosage is 0.6mg / L (based on Al 2 o 3 The membrane pollution is alleviated, the effluent water quality is guaranteed, the secondary online coagulation does not affect the chemical cleaning of the membrane, and the transmembrane pressure difference of the polluted membrane can be completely restored after being cleaned by sodium hypochlorite.

[0014] Calculation:

[0015] A. To ensure uniform outflow, such as Figure 4 shown

[0016] Let the flow velocity at the inlet of the main water distribution pipe 3 be ν

[0017] Q 0 The initial flow and initial pressure head of the main water distribution pipe on each side is H 1 ;The flow velocity at the end of the pipe is zero, and the pressure head is H 2 ;

[001...

specific Embodiment approach 2

[0083] Specific implementation mode two: as figure 1 As shown, the inclination angle of the swash plates 6 in this embodiment is 50-60 degrees, and the distance between two adjacent slant plates 6 is 35 mm. Such setting ensures smooth mud discharge. Other components and connections are the same as those in the first embodiment.

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Abstract

The invention provides an ultrafiltration membrane pool with a secondary on-line coagulation function, relates to an ultrafiltration membrane pool, and aims to solve the problems of non-uniform water intake, impact on membrane components, large transmembrane pressure difference and high operation energy consumption in the conventional ultrafiltration membrane pool. A plurality of membrane components are arranged in the membrane pool sequentially along the length direction; a plurality of inclined plates are arranged below the membrane components; a discharge valve is arranged in a sludge area and near the side wall of a drainage channel; the water inlet end of the membrane pool and a water inlet total channel are communicated mutually; a liquid level control valve is arranged at the water inlet end of the membrane pool; two water distribution hole main pipes are correspondingly arranged on the inner walls of the two sides of the membrane pool horizontally along the length direction and positioned at the upper end of the membrane pool; a plurality of water distribution holes are distributed in each water distribution hole main pipe uniformly along the length direction; an energy dissipation weir is arranged below each water distribution hole main pipe and arranged oppositely to the corresponding water distribution hole; and the lower end face of each energy dissipation weir is contacted with the upper end of a corresponding water inlet grating lattice wall. The ultrafiltration membrane pool with the secondary on-line coagulation function is applied to advanced treatment of drinking water.

Description

technical field [0001] The invention relates to an ultrafiltration membrane pool, in particular to an ultrafiltration membrane pool with secondary on-line coagulation function. Background technique [0002] The development of ultrafiltration membranes for tap water production is particularly rapid. Ultrafiltration membrane technology has the ability to efficiently intercept particulate matter, colloids, algae, and pathogenic microorganisms. It has the characteristics of low energy consumption and small footprint while improving effluent water quality. Membranes have broad application prospects in the upgrading and transformation of existing water plants. One of the main problems hindering the large-scale application of ultrafiltration technology is membrane fouling. Membrane fouling will cause an increase in transmembrane pressure difference (constant flow operation mode), which will lead to an increase in water production costs. Coagulation / sedimentation pretreatment genera...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D65/08B01D61/18C02F1/44
Inventor 杜星梁恒赖日明李凯瞿芳术王美莲林显增李圭白
Owner HARBIN INST OF TECH
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