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Ion plating film and its forming method and water filter device

An ion coating and ion membrane technology, applied in the field of water treatment, can solve the problems of increased membrane operating pressure, increased turbidity of effluent, and reduced water production, achieving low cost, prolonging service life, reducing power consumption and operating costs Effect

Active Publication Date: 2019-07-19
北京市自来水集团有限责任公司第四水厂
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, when using a filter to filter, occasionally the filter will be suddenly penetrated (the pressure increases instantaneously, and the turbidity in the filter material aperture in the filter in the morning is pressed out by the water body, causing the water body to suddenly become turbid). As a result, the turbidity of the effluent increases instantaneously, causing serious consequences
[0004] The microfiltration or ultrafiltration membranes used in existing filters still face the problem of membrane fouling during operation. Membrane fouling leads to an increase in membrane operating pressure or a decrease in water production

Method used

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  • Ion plating film and its forming method and water filter device
  • Ion plating film and its forming method and water filter device
  • Ion plating film and its forming method and water filter device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] A microfiltration ionic membrane with a pore size of 0.01 μm and only one hollow fiber membrane module is selected to be placed in the water flow channel between the water inlet and the water outlet of the water filtration device, and the water containing calcium and magnesium ions is injected from the water inlet of the water filtration device. Water body and at the same time add slaked lime with a weight ratio of 1L:1mg to the water body, the water body will form a CaCO 3 and Mg(OH) 2 Precipitated floc turbid liquid. Start the suction pump connected to the water outlet, CaCO 3 and Mg(OH) 2 Then the negative pressure formed on the side of the water outlet moves to the water outlet together with the water body, among which, CaCO 3 and Mg(OH) 2 It is deposited on the surface of the microfiltration ionic membrane at a weight ratio of 1:3 to form a 0.001mm coating, and together with the microfiltration ionic membrane to form a coating with a thickness of 0.06mm, the wa...

Embodiment 2

[0040] Select the nanofiltration ionic membrane containing 2 hollow fiber membrane modules with a pore size of 0.006 μm to place the water flow channel between the water inlet and the water outlet of the water filtration device, inject water containing magnesium ions from the water inlet of the water filtration device and At the same time, add caustic soda with a weight ratio of 1L:2000mg to the water body, and the water body will form 3 and Mg(OH) 2 Precipitated floc turbid liquid. Start the suction pump connected to the water outlet, CaCO 3 and Mg(OH) 2 Then the negative pressure formed on the side of the water outlet moves to the water outlet together with the water body, among which, CaCO 3 and Mg(OH) 2 It is deposited on the surface of each hollow fiber membrane module in the ultrafiltration ionic membrane at a weight ratio of 1:1 to form a 2mm coating, and together with the ultrafiltration ionic membrane to form a coating with a thickness of 4mm, the water body is fi...

Embodiment 3

[0042] Select an ultrafiltration ionic membrane with a pore size of 0.005 μm containing 3 hollow fiber membrane modules to be placed in the water flow channel between the water inlet and the water outlet of the water filtration device, and inject water containing calcium and magnesium ions from the water inlet of the water filtration device And at the same time, add a mixture of caustic soda and slaked lime with a weight ratio of 1L:1000mg to the water body, and the water body will form a CaCO 3 and Mg(OH) 2 Precipitated floc turbid liquid. Start the suction pump connected to the water outlet, CaCO 3 and Mg(OH) 2 Then the negative pressure formed on the side of the water outlet moves to the water outlet together with the water body, among which, CaCO 3 and Mg(OH) 2 It is deposited on the surface of each hollow fiber membrane module in the nanofiltration ionic membrane at a weight ratio of 2:1 to form a 1mm coating, and together with the nanofiltration ionic membrane to for...

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Abstract

The invention relates to an ion plating film, a forming method thereof and a water filtering device, belonging to the field of water treatment. The ion coating includes a membrane system and a coating. The membrane system includes any one of the microfiltration ion membrane, ultrafiltration ion membrane and nanofiltration ion membrane. The coating is arranged on the surface of the membrane system. The coating is mainly composed of CaCO 3 and Mg(OH) 2 production. The formation method of the ion plating film is as follows: the membrane system is arranged in the water flow channel between the water inlet and the water outlet of the water filter device, the water body containing calcium and magnesium ions is injected into the water filter device, and alkaline substances are added from the water inlet until The surface of the membrane system forms an ion-coated film. The water filtration device provided with the ion plating film can reduce the transmembrane pressure difference in the water treatment process and reduce the energy consumption of the pump. The formation method of the ion plating film is simple, the cost is low, and it can be used for different water treatments.

Description

technical field [0001] The invention relates to the field of water treatment, and in particular to an ion plating film, a forming method thereof and a water filtering device. Background technique [0002] Commonly used methods to reduce hardness in water include ion exchange, electrodialysis, reverse osmosis and chemical softening. However, ion exchange, electrodialysis and reverse osmosis all have disadvantages such as high cost, high operating cost, and low water production rate. Lime is the most commonly used agent in the agent softening method, which is characterized by simple operation and low cost. The hardness in groundwater is mainly bicarbonate hardness, that is, "temporary hardness". The lime method has a good effect on removing "temporary hardness" in groundwater. [0003] In the conventional water treatment process, filtration generally refers to the simplest and most commonly used separation method that uses quartz sand and other granular filter materials to i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D61/02B01D61/08B01D61/14B01D61/18B01D69/02C02F1/44
CPCB01D61/027B01D61/08B01D61/145B01D61/147B01D61/18B01D69/02C02F1/442C02F1/444
Inventor 梁再辉申今生王卫国刘盛刘宇焦文婷夏铮张喆
Owner 北京市自来水集团有限责任公司第四水厂