RGB reproduction waste liquid recycling method
A waste liquid recovery and remanufacturing technology, applied in chemical instruments and methods, water treatment parameter control, multi-stage water treatment, etc., can solve problems such as inability to remove KOH, high KOH concentration, moisture content or high KOH content, etc.
Active Publication Date: 2016-12-07
惠州市惠阳区力行环保有限公司
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[0003] However, in the production process of LCD screens, various production waste liquids will be produced, and RGB remanufacturing waste liquids are produced during the production process of LCD screens. The waste liquids mainly contain KOH and mixed organic solvents. The water content is as high as 90%, and the KOH content is about 20%.
At present, this type of waste liquid is mainly concentrated. The disadvantage of this method is that concentration can only remove most of the water in the waste liquid, and KOH cannot be removed. As a result, the concentration of KOH will be extremely high. The water content and KOH content are both high and cannot be recycled
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[0014] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments, where the schematic embodiments and descriptions of the present invention are used to explain the present invention, but not to limit the present invention.
[0015] Such as figure 1 Shown, a kind of RGB remanufacturing waste liquid recycling method comprises the following steps:
[0016] S1. Add excessive KOH to the RGB remanufactured waste liquid to supersaturation, so that the oil phase and the water phase are separated; specifically, the water content of the original RGB remanufactured waste liquid is about 90%, and the KOH content reaches 20%. According to KOH Based on the principle of strong hydrophilicity, excess KOH is added to the RGB remanufactured waste liquid to supersaturation, so that the oil phase and the water phase are separated;
[0017] S2. Separating the oil phase and the water phase; specifically, this step can initially s...
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The invention discloses an RGB reproduction waste liquid recycling method. The method includes the following steps: (1) adding excessive KOH into RGB reproduction waste liquid till supersaturation, enabling oil phase and aqueous phase to be layered, and separating the oil phase and the aqueous phase; (2) adding excessive KOH into the oil phase separated in the step (1) till supersaturation, enabling the oil phase and the aqueous phase to be further layered, and separating the oil phase and the aqueous phase. The method further includes after distillation and concentration are performed till the content of KOH in the aqueous phase separated in the step (1) is over 75%, reputting into the RGB reproduction waste liquid for recycling. The oil phase separated through the method is 0.5-1% in moisture content and 9-10 in pH and completely reaches the standard of recycling, COD of aqueous-phase waste liquid is lowered to about 20ppm, and the aqueous-phase waste liquid is completely up to the standard of emission.
Description
technical field [0001] The invention relates to the field of recovery and treatment of industrial waste liquid, in particular to a recycling method for RGB remanufactured waste liquid, which realizes oil-water separation by adding excessive KOH solids to the waste liquid. Background technique [0002] Liquid Crystal Display (LCD) A type of display used in digital clocks and many portable computers. LCD displays use two sheets of polarized material with a liquid crystal solution between them. Passing an electric current through the liquid rearranges the crystals so that light cannot pass through them. Thus, each crystal acts like a shutter, allowing light to pass through and blocking it. Liquid crystal display (LCD) technology information products are all developing towards light, thin, short and small goals at present, and display products with a long history in computer peripherals are certainly no exception. Under the premise of being easy to carry and transport, tradit...
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IPC IPC(8): C02F9/04C02F9/10
CPCC02F1/04C02F1/285C02F1/40C02F1/68C02F9/00C02F2209/08C02F2301/08
Inventor 庞流郏彩霞田锦文陈星明张春志
Owner 惠州市惠阳区力行环保有限公司