Membrane element, water treatment device and water treatment method

A membrane element and pure water technology, applied in separation methods, chemical instruments and methods, membrane technology, etc., can solve the problems of increasing wastewater and reducing scaling, and achieve the goals of prolonging service life, reducing scaling tendency, and reducing scaling Effect

Active Publication Date: 2014-10-08
A O SMITH (CHINA) ENVIRONMENTAL PRODUCTS CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, adding antiscalants while reducing scaling also led to an increase in wastewater

Method used

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  • Membrane element, water treatment device and water treatment method
  • Membrane element, water treatment device and water treatment method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] Add seven 10cm-long 0.5mm-diameter iridium oxide-coated titanium wires as electrodes in the inlet grid of the 1810-75G-ss side-flow type reverse osmosis membrane element (the water inlet direction changes), and the pure water guide cloth Add seven 5cm-long and 0.5mm-diameter iridium oxide-coated titanium wires as electrodes, and the total surface area S of the pure water end electrodes is 5.5cm 2 , the length of each diaphragm is 72.5cm, and the total distance between the electrodes is 15cm. In this example, the long side of the electrode layout area of ​​the pure water end is 15cm long, the long side is perpendicular to the direction of water flow, the short side is 5cm long, and the short side is parallel to the inlet water flow direction. Water flow direction; where A is the length of the short side of the pure water electrode layout area, which is 5cm, B is the distance from the electrode wire closest to the water inlet to the water collection pipe, which is 5cm, and...

Embodiment 2

[0053] Add 7 10cm-long 0.5mm diameter iridium oxide-coated titanium wires as electrodes to the water inlet grid of TW-1812-75G ordinary reverse osmosis membrane element (the water inlet direction does not change), and add 3 wires to the pure water guide cloth 15cm long copper wire with a diameter of 0.25mm is used as the electrode, the length of the water inlet channel is 30cm, and the total distance between the electrodes is 2.5cm. The short side is 2.5cm, parallel to the flow direction of the influent water, where A is 2.5cm, B is 1cm, and C' is 30cm. A new type of roll-type membrane element for controlling membrane fouling is prepared, and the pure water end electrode wire and the negative electrode of the DC power supply The electrode wire at the water inlet is connected to the positive pole of the DC power supply. When the power is on, the tap water is separated by using the new roll-type membrane element that controls membrane fouling. The recovery rate is 33%. When the ...

Embodiment 3

[0055] The preparation method of the roll type membrane element of novel control membrane fouling is as embodiment 1, wherein adds 6 iridium-coated titanium wires of 15cm length in the pure water guiding cloth, under electrification condition, TDS is that the tap water of 160ppm is separated, and the recovery rate Controlled at 50%, when the current is 60-100mA, the pH of the pure water increases from 6.5 to 8.5, and the LSI at the wastewater end decreases to below 0.5.

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Abstract

The invention relates to a membrane element, a water treatment device and a water treatment method. Electrodes are respectively added to the water inlet end and the pure water end of the membrane element, and the electrodes are respectively positioned on the two sides of a membrane.

Description

technical field [0001] The invention relates to a membrane element, a water treatment device and a water treatment method, in particular to a novel reverse osmosis or nanofiltration membrane element capable of alleviating inorganic salt fouling, a water treatment device comprising the membrane element, and a membrane element using the membrane element water treatment methods. Background technique [0002] Reverse osmosis membrane elements are the core components of membrane water treatment technology, which can remove microorganisms, ions, etc. in water sources to obtain pure water. At present, the existing reverse osmosis membrane elements mainly achieve the purpose of producing pure water through the reverse osmosis membrane under a certain pressure. In the actual process of using reverse osmosis membrane elements to treat tap water, it is found that the generated wastewater has high alkalinity and hardness. In this case, the wastewater has a high LSI value and is easy to...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D63/00B01D65/08C02F1/469
Inventor 侯贻直黄燕王强
Owner A O SMITH (CHINA) ENVIRONMENTAL PRODUCTS CO LTD
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