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Water treatment immersion tank and water treatment device and method

An immersion tank and water treatment technology, applied in the direction of osmosis/dialysis water/sewage treatment, etc., can solve the problems of single design function, large backwash drainage, and poor practicability

Inactive Publication Date: 2013-05-29
TORAY FIBER RES INST(CHINA) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the disadvantages that the coagulation sedimentation process is used in drinking water treatment, which occupies a large area, and the single design function of the water inlet causes the membrane to be easily polluted, which makes the backwash frequency high, the backwash discharge volume is large, the recovery rate decreases, and the practicability is not strong. Combining the characteristics of online coagulation + submerged ultrafiltration membrane technology, a water treatment immersion tank and water treatment device and method are provided. Through the function of the water inlet of the immersion tank, the online coagulation effect is improved, thereby reducing membrane fouling and backwash water Emissions, increased membrane life

Method used

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  • Water treatment immersion tank and water treatment device and method

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Effect test

Embodiment 1

[0025] This test uses a certain surface raw water, its turbidity is about 10-20NTU, COD Mn Around 3mg / L. The raw water quality belongs to Class III water body, and the water body is only slightly polluted. The operating process of the system is the process of online coagulation + submerged ultrafiltration. The submerged ultrafiltration membrane is a hollow fiber ultrafiltration membrane with a pore size of 0.01 micron and the material is PVDF ultrafiltration membrane. The operating flux is 1.7m / d. Adopt the conventional water inlet method and device operation, run for 30min and backwash for 1.0min, the backwash water volume is 1.1 times of the water production volume, after the backwash is completed, the immersion tank is emptied, the recovery rate is 93%, and the membrane CIP cleaning frequency is 90 days. The device is running, the recovery rate reaches 96%, and the CIP cleaning frequency can reach 150 days.

Embodiment 2

[0027] This test uses slightly polluted surface raw water, its turbidity is above 30NTU, COD Mn Around 4mg / L. The operating process of the system is the process of online coagulation + submerged ultrafiltration. The submerged ultrafiltration membrane is a hollow fiber ultrafiltration membrane with a pore size of 0.01 micron and the material is PVDF ultrafiltration membrane. The operating flux is 1.7m / d. Adopt conventional water inlet mode and device operation, run for 30 minutes to backwash for 1.0min, the backwash water volume is 1.1 times of the water production volume, after the backwash is completed, the immersion tank is emptied, the membrane pressure difference is 30-55kPa, and the backwash recovery rate is 94%. The CIP cleaning frequency is 30 days. Using this device to operate, the membrane pressure difference is 30-45kPa, the recovery rate reaches 96%, and the CIP cleaning frequency can reach 90 days, which reduces energy consumption, improves the recovery rate, and...

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Abstract

The invention discloses a water treatment immersion tank and water treatment device and method. Water to be treated flows into the immersion tank through a plurality of water inlets, online coagulation effect of coagulant is improved through layout of the water inlets and water inflow energy, so that water flow has a certain rinsing function on the surface of a film, film pollution is reduced, energy consumption is lowered, and the service life of the film is prolonged. By means of characteristics of the immersion tank and use with other devices, the novel energy-saving water treatment device is manufactured, and by the aid of the operation way of the water treatment device, film pollution and energy consumption can be reduced.

Description

technical field [0001] The invention belongs to the field of membrane water treatment, and in particular relates to a submerged membrane treatment device. Background technique [0002] With the increasing development of water treatment membrane technology, domestic microfiltration / ultrafiltration membrane technology has made great progress in the field of drinking water treatment. The water treatment process has achieved good operation results in practical projects. [0003] At present, the membrane process used for water treatment mainly includes coagulation + sedimentation + immersion ultrafiltration membrane. After the raw water passes through the coagulation sedimentation tank, it enters the immersion tank through a single water inlet pipeline, and then the water is filtered through the membrane. The turbidity of the precipitated water is low. The high turbidity resistance of the submerged membrane cannot be utilized, and the process occupies a large area. [0004] The...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/44
Inventor 邹高辉常春杨瑜芳
Owner TORAY FIBER RES INST(CHINA) CO LTD
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