Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Pickling wastewater purification treatment and cyclic utilization method
The invention relates to a method for purifying and recycling pickling wastewater, which comprises the following steps: adding a calcium-based neutralizer into the pickling wastewater, neutralizing to obtain neutralized water, filtering the neutralized water to obtain metal hydroxide and a neutralized solution, concentrating the neutralized solution to obtain recycled water and a concentrated solution, and recycling the recycled water and the concentrated solution. The concentrated solution enters a regeneration link; the value range of the nitrate ion concentration a2 in the concentrated solution is more than or equal to 80g/L and less than or equal to 350g/L, the calcium ion concentration b2 meets the following condition: b2 = k2 * a2-c2, 0.25 < = k2 < = 0.5, 0 < = c2 < = 20g/L, and the pH value of the concentrated solution is more than 7 and less than or equal to 12. According to the method, low-concentration nitrate radicals are directly concentrated into high-concentration nitrate radicals for resource utilization, the operation process is simple, the treatment effect is good, and the application range is wide.
本发明涉及一种酸洗废水的净化处理及循环利用方法，所述方法先向酸洗废水中加入钙基中和剂进行中和过程得到中和水，再将中和水进行过滤得到金属氢氧化物和中和液，再将中和液进行浓缩过程得到回用水和浓缩液，所述浓缩液进入再生环节；所述浓缩液中的硝酸根离子浓度a2的取值范围为80g/L≤a2≤350g/L，钙离子浓度b2满足：b2=k2*a2‑c2，其中，0.25≤k2≤0.5，0≤c2≤20g/L，且所述浓缩液的7＜pH≤12。本发明所述的方法直接将低浓度的硝酸根浓缩为高浓度的硝酸根，进而资源化利用，不仅运行过程简单，而且处理效果好，适用范围广。
Pickling wastewater purification treatment and cyclic utilization method
The invention relates to a method for purifying and recycling pickling wastewater, which comprises the following steps: adding a calcium-based neutralizer into the pickling wastewater, neutralizing to obtain neutralized water, filtering the neutralized water to obtain metal hydroxide and a neutralized solution, concentrating the neutralized solution to obtain recycled water and a concentrated solution, and recycling the recycled water and the concentrated solution. The concentrated solution enters a regeneration link; the value range of the nitrate ion concentration a2 in the concentrated solution is more than or equal to 80g/L and less than or equal to 350g/L, the calcium ion concentration b2 meets the following condition: b2 = k2 * a2-c2, 0.25 < = k2 < = 0.5, 0 < = c2 < = 20g/L, and the pH value of the concentrated solution is more than 7 and less than or equal to 12. According to the method, low-concentration nitrate radicals are directly concentrated into high-concentration nitrate radicals for resource utilization, the operation process is simple, the treatment effect is good, and the application range is wide.
本发明涉及一种酸洗废水的净化处理及循环利用方法，所述方法先向酸洗废水中加入钙基中和剂进行中和过程得到中和水，再将中和水进行过滤得到金属氢氧化物和中和液，再将中和液进行浓缩过程得到回用水和浓缩液，所述浓缩液进入再生环节；所述浓缩液中的硝酸根离子浓度a2的取值范围为80g/L≤a2≤350g/L，钙离子浓度b2满足：b2=k2*a2‑c2，其中，0.25≤k2≤0.5，0≤c2≤20g/L，且所述浓缩液的7＜pH≤12。本发明所述的方法直接将低浓度的硝酸根浓缩为高浓度的硝酸根，进而资源化利用，不仅运行过程简单，而且处理效果好，适用范围广。
Pickling wastewater purification treatment and cyclic utilization method
一种酸洗废水的净化处理及循环利用方法
ZHANG LIPING (Autor:in) / SHANG GUANGHAO (Autor:in)
06.12.2024
Patent
Elektronische Ressource
Chinesisch
IPC:
C02F
Behandlung von Wasser, Schmutzwasser, Abwasser oder von Abwasserschlamm
,
TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
/
C23G
CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
,
Reinigen oder Entfetten metallischer Werkstoffe durch chemische Verfahren, ausgenommen Elektrolyse
/
E03B
Anlagen oder Verfahren zum Gewinnen, Sammeln oder Verteilen von Wasser
,
INSTALLATIONS OR METHODS FOR OBTAINING, COLLECTING, OR DISTRIBUTING WATER
Water purification machine wastewater utilization device
| Europäisches Patentamt | 2015
Purification of waste liquors from stainless steel pickling
| Engineering Index Backfile | 1959
Purification of waste liquors from stainless steel pickling
| Engineering Index Backfile | 1959
Chemical Treatment for Nitrite Nitrogen Removal From Stainless Steel Pickling Liquor Wastewater
| British Library Conference Proceedings | 2011