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Drinking water ultrafiltration system without dosing and unpowered backwashing and operation method

An ultrafiltration system and drinking water technology, which is applied in the treatment of polluted groundwater/leachate, ultrafiltration, chemical instruments and methods, etc., can solve the problems of the introduction of sodium hypochlorite, the increase of the cost of system equipment, and the complicated and complicated cleaning steps. To avoid breeding, improve water production efficiency, simplify and stabilize water supply without medicine

Pending Publication Date: 2022-06-03
TIANJIN UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] There are many deficiencies in the above process methods: firstly, the cleaning steps are cumbersome and complicated, requiring air washing, water backwashing, discharge and sodium hypochlorite decontamination, which limits the water production efficiency to a certain extent; secondly, the introduction of sodium hypochlorite has potential safety hazards; furthermore, the The process method needs to be equipped with a backwash pump for backwashing and a dosing system to input sodium hypochlorite, which increases the cost of system equipment and energy consumption, and also requires regular replenishment of chemicals, which has high requirements for transportation

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  • Drinking water ultrafiltration system without dosing and unpowered backwashing and operation method

Examples

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Effect test

Embodiment 1

[0050] A drinking water ultrafiltration system with no dosing and no power backwashing, comprising an ultrafiltration water inlet tank 1, an ozone generator 2, an ultrafiltration water supply pump 3, a first ultrafiltration membrane unit 4, and a second ultrafiltration membrane unit 5. Ultrafiltration water production tank 6 and air compressor 7, including:

[0051] The water outlet of the ultrafiltration water inlet tank 1 is connected to the water inlet of the ultrafiltration water supply pump 3 through an output pipeline 8, and the ozone generating device 2 is connected to the output pipeline 8 through a pipeline. The water outlet of the ultrafiltration water supply pump 3 is connected to the water supply pipeline 9, and the water supply pipeline 9 is communicated with the water inlet port of the first ultrafiltration membrane unit 4 through the first branch 10, and the water supply pipeline 9 passes through The second branch 11 is communicated with the water inlet port of ...

Embodiment 2

[0062] The drinking water ultrafiltration system with no dosing and no power backwashing also includes a security filter inlet and outlet pipelines and a security filter arranged on the security filter inlet and outlet pipelines. The security filter inlet and outlet pipelines 12 Parallel pipelines are formed on part of the water supply pipelines 9 in parallel, and a drainage pipeline is arranged at the bottom of the security filter, and a DN50 discharge valve is arranged on the drainage pipeline. The security filter is used to block the possible damage to the membrane wire caused by large particles of impurities.

[0063] Preferably, a first manual valve V07 is provided on the water supply pipeline 9 connected in parallel with the security filter water inlet and outlet pipeline 12, and a second manual valve V08 is provided on the security filter water inlet and outlet pipeline 12. When the valve V07 is opened and the second manual valve V08 is closed, the water pumped by the u...

Embodiment 3

[0074] The operation method of drinking water ultrafiltration system in embodiment 2:

[0075] When the first ultrafiltration membrane unit 4 produces water: open the ultrafiltration UF01 membrane water inlet valve EV01, ultrafiltration UF01 water production valve EV03, ultrafiltration total water production valve EV13, open the ozone generator 2, and open the ultrafiltration water supply pump 3 . The raw water mixed with ozone is driven by the pressure of the ultrafiltration water supply pump 3, and enters the first ultrafiltration membrane unit 4 to start water production. When the quality of the raw water deteriorates, the ultrafiltration UF01 concentrated water valve EV02 can be opened at the same time, and part of the water enters It is filtered in the first ultrafiltration membrane unit 4, and part of the water is returned to the ultrafiltration water inlet tank 1 to form a cross flow to reduce membrane fouling.

[0076] When cleaning the first ultrafiltration membrane ...

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Abstract

In the drinking water ultrafiltration system, a water outlet of an ultrafiltration water inlet tank is connected to a water inlet of an ultrafiltration water supply pump through an output pipeline, an ozone generation device is connected to the output pipeline through a pipeline, a water outlet of the ultrafiltration water supply pump is connected with a water supply pipeline, and the water supply pipeline is connected with a water outlet of the ultrafiltration water inlet tank. The water supply pipeline is communicated with a water inlet port of the first ultrafiltration membrane unit through a first branch, the water supply pipeline is communicated with a water inlet port of the second ultrafiltration membrane unit through a second branch, a water outlet port of each ultrafiltration membrane unit is connected to a water outlet pipeline through a water outlet branch, and the water outlet pipeline is connected to an ultrafiltration water production tank. The air compressor is connected to the water inlet side of each ultrafiltration membrane unit through an air pipeline, the water outlet branches of the two ultrafiltration membrane units are connected to form a backwashing pipeline, and drain outlets are formed in the concentrated water side and the water inlet side of each ultrafiltration membrane unit. The ultrafiltration system disclosed by the invention is low in energy consumption and high in cleanliness.

Description

technical field [0001] The invention relates to the technical field of drinking water produced by ultrafiltration, in particular to a drinking water ultrafiltration system and an operation method with no dosing and no power backwashing. Background technique [0002] When groundwater is used as water supply source, the main indicators of membrane fouling are suspended solids, colloids, bacteria and microorganisms. The existing conventional ultrafiltration operation process method needs to be equipped with a backwash pump, an air compressor, etc. to eliminate suspended solids and colloids by physical methods such as air-water washing and water backwashing. In view of the pollution of bacteria and microorganisms to the ultrafiltration membrane, the main purpose is to set up a dosing device and add a certain concentration of sodium hypochlorite to remove it through backwashing, so as to achieve the purpose of restoring the membrane flux. [0003] When producing water by ultrafi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/44B01D61/14B01D61/18B01D65/02C02F103/06
CPCC02F1/444B01D61/145B01D61/18B01D65/022B01D65/02C02F2303/14B01D2321/18B01D2321/04C02F2103/06C02F2301/08
Inventor 蔡诚吴秀丽田一梅禇献献贾世超高敏戈澄刘海龙于浩明
Owner TIANJIN UNIV