A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Titanium dioxide wastewater non-waste treatment method
The invention relates to a waste-free treatment method for titanium dioxide wastewater, which comprises the following steps: 1) neutralizing the titanium dioxide wastewater for the first time until the pH value is 2.0-3.0, and carrying out solid-liquid separation to obtain white gypsum and primary filtrate; 2) neutralizing the primary filtrate for the second time until the pH value is 3.5-4.5, adding a flocculating agent, and performing solid-liquid separation to obtain metatitanic acid and secondary filtrate; and 3) adding an oxidizing agent into the secondary filtrate to react, neutralizing for the third time until the pH value is 6.0-7.0, adding a flocculating agent, and carrying out solid-liquid separation to obtain iron oxyhydroxide and a third filtrate. According to the method disclosed by the invention, various resources in the titanium dioxide wastewater are completely recycled through step-by-step neutralization and control of the pH value in each step of neutralization, so that byproducts with relatively high value can be obtained, the original solid waste stacking problem can be solved, and the economic benefit can also be improved.
本发明涉及一种钛白废水无废化处理方法，包括以下步骤：1)钛白废水第一次中和至pH值2.0‑3.0，固液分离后得到白石膏和一次滤液；2)一次滤液进行第二次中和至pH值3.5‑4.5，加絮凝剂后固液分离，得到偏钛酸和二次滤液；3)二次滤液加入氧化剂反应后，再进行第三次中和至pH值6.0‑7.0，加絮凝剂后固液分离，得到羟基氧化铁和三次滤液。本发明通过分步中和，控制每步中和时的pH值，实现钛白废水中各种资源的完全回收，能够得到价值较高的副产，既可以解决原来的固废堆放问题，也可以提高经济收益。
Titanium dioxide wastewater non-waste treatment method
The invention relates to a waste-free treatment method for titanium dioxide wastewater, which comprises the following steps: 1) neutralizing the titanium dioxide wastewater for the first time until the pH value is 2.0-3.0, and carrying out solid-liquid separation to obtain white gypsum and primary filtrate; 2) neutralizing the primary filtrate for the second time until the pH value is 3.5-4.5, adding a flocculating agent, and performing solid-liquid separation to obtain metatitanic acid and secondary filtrate; and 3) adding an oxidizing agent into the secondary filtrate to react, neutralizing for the third time until the pH value is 6.0-7.0, adding a flocculating agent, and carrying out solid-liquid separation to obtain iron oxyhydroxide and a third filtrate. According to the method disclosed by the invention, various resources in the titanium dioxide wastewater are completely recycled through step-by-step neutralization and control of the pH value in each step of neutralization, so that byproducts with relatively high value can be obtained, the original solid waste stacking problem can be solved, and the economic benefit can also be improved.
本发明涉及一种钛白废水无废化处理方法，包括以下步骤：1)钛白废水第一次中和至pH值2.0‑3.0，固液分离后得到白石膏和一次滤液；2)一次滤液进行第二次中和至pH值3.5‑4.5，加絮凝剂后固液分离，得到偏钛酸和二次滤液；3)二次滤液加入氧化剂反应后，再进行第三次中和至pH值6.0‑7.0，加絮凝剂后固液分离，得到羟基氧化铁和三次滤液。本发明通过分步中和，控制每步中和时的pH值，实现钛白废水中各种资源的完全回收，能够得到价值较高的副产，既可以解决原来的固废堆放问题，也可以提高经济收益。
Titanium dioxide wastewater non-waste treatment method
一种钛白废水无废化处理方法
CHI YONGMING (author) / HOU DAN (author) / HE JUN (author) / LIU QIQI (author) / ZHAO QIN (author) / ZHOU CHUNYONG (author) / WU PENGSEN (author)
2023-08-15
Patent
Electronic Resource
Chinese
IPC:
C02F
Behandlung von Wasser, Schmutzwasser, Abwasser oder von Abwasserschlamm
,
TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
/
C01F
COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
,
Verbindungen der Metalle Beryllium, Magnesium, Aluminium, Calcium, Strontium, Barium, Radium, Thorium oder der Seltenen Erden
/
C01G
Verbindungen der von den Unterklassen C01D oder C01F nicht umfassten Metalle
,
COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
/
C04B
Kalk
,
LIME
Treatment process of acid wastewater in titanium dioxide production
| European Patent Office | 2021
Chromium - Containing Wastewater Treatment by Copperas Byproduct in Titanium Dioxide Production
| British Library Online Contents | 2005
Method for treating sulfate-process titanium dioxide water-washing wastewater
| European Patent Office | 2020
| Springer Verlag | 2024