Titanium dioxide acid wastewater treatment and recovery process
A technology of acid wastewater and titanium dioxide, which is applied in water/sewage treatment, heating water/sewage treatment, adsorbed water/sewage treatment, etc., can solve problems such as environmental damage, achieve significant benefits in energy saving and emission reduction, and realize the recycling of water resources Effect
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Embodiment 1
[0044] The titanium dioxide acidic waste water treatment and recovery process described in the present embodiment 1 is made up of the following steps:
[0045] (1) Titanium dioxide acidic waste water enters the ultrafiltration system and is filtered through the hollow fiber ultrafiltration membrane to obtain the membrane filtrate;
[0046] (2) The membrane filtrate obtained in step (1) enters the ion exchange system and is adsorbed by resin, and the waste water containing iron salt obtained by separation reclaims iron salt for reuse, and the resin adsorbed by free acid is cleaned to obtain relatively pure dilute sulfuric acid;
[0047] (3) The relatively pure dilute sulfuric acid obtained in step (2) is pumped into the nanofiltration system for filtration, and the membrane permeate is pure sulfuric acid, which is then concentrated through multiple-effect evaporation to obtain ≥50% clean sulfuric acid for reuse in titanium White powder production system.
[0048] in:
[0049]...
Embodiment 2
[0068] Titanium dioxide acidic waste water treatment and recycling process described in the present embodiment 2 is made up of the following steps:
[0069] (1) Titanium dioxide acidic waste water enters the ultrafiltration system and is filtered through the hollow fiber ultrafiltration membrane to obtain the membrane filtrate;
[0070] (2) The membrane filtrate obtained in step (1) enters the ion exchange system and is adsorbed by resin, and the waste water containing iron salt obtained by separation reclaims iron salt for reuse, and the resin adsorbed by free acid is cleaned to obtain relatively pure dilute sulfuric acid;
[0071] (3) The relatively pure dilute sulfuric acid obtained in step (2) is pumped into the nanofiltration system for filtration, and the membrane permeate is pure sulfuric acid, which is then concentrated through multiple-effect evaporation to obtain ≥50% clean sulfuric acid for reuse in titanium White powder production system.
[0072] in:
[0073] In...
Embodiment 3
[0092] The titanium dioxide acidic waste water treatment and recovery process described in the present embodiment 3 is made up of the following steps:
[0093] (1) Titanium dioxide acidic waste water enters the ultrafiltration system and is filtered through the hollow fiber ultrafiltration membrane to obtain the membrane filtrate;
[0094] (2) The membrane filtrate obtained in step (1) enters the ion exchange system and is adsorbed by resin, and the waste water containing iron salt obtained by separation reclaims iron salt for reuse, and the resin adsorbed by free acid is cleaned to obtain relatively pure dilute sulfuric acid;
[0095] (3) The relatively pure dilute sulfuric acid obtained in step (2) is pumped into the nanofiltration system for filtration, and the membrane permeate is pure sulfuric acid, which is then concentrated through multiple-effect evaporation to obtain ≥50% clean sulfuric acid for reuse in titanium White powder production system.
[0096] in:
[0097]...
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