Deep treatment technology of high-ammonia nitrogen rare earth wet process-smelted saponifying wastewater

A technology for advanced treatment and saponification of wastewater, applied in metallurgical wastewater treatment, water/sewage multi-stage treatment, water/sludge/sewage treatment, etc., can solve the environmental pollution of wastewater containing high concentrations of ammonia nitrogen, and avoid scaling problems , tower height reduction, and high processing efficiency

Active Publication Date: 2011-08-31
JIANGSU HUASHAN ENVIRONMENTAL PROTECTION TECH
View PDF4 Cites 11 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] The purpose of the present invention is to overcome the deficiencies of the prior art and provide an advanced treatment process for high-ammonia-nitrogen rare earth wet smelting saponification wastewater, thereby better solving the problem of environmental pollution caused by high-concentration ammonia-nitrogen wastewater in the rare earth industry

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Deep treatment technology of high-ammonia nitrogen rare earth wet process-smelted saponifying wastewater
  • Deep treatment technology of high-ammonia nitrogen rare earth wet process-smelted saponifying wastewater
  • Deep treatment technology of high-ammonia nitrogen rare earth wet process-smelted saponifying wastewater

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] 1) For the high-concentration ammonia-nitrogen wastewater produced in the rare earth extraction process, 30-50m 3 The flow rate of / h flows into the reaction pool, and according to the amount of 10-20kg CaO and CaS mixed reaction agent (including CaSO. metal ions and F - , SO 4 2- Plasma;

[0033]2) After fully reacting in the reaction tank for 2 hours, pump it into the sedimentation tank. After 2 hours of sedimentation, the waste water flows into the clear water tank, and the waste residue containing various metal ions is pumped into the waste residue recovery device for recycling through the sludge pump;

[0034] 3) The exhaust from the heating boiler contains CO 2 The waste flue gas is passed into the clear water pool, to Ca 2+ The content is below 0.01mol / L, filter and use the CO in the waste flue gas 2 Free Ca in precipitation wastewater 2+ Ions; use the strong alkaline environment of clean water to absorb sulfides, nitrogen oxides, etc. in waste flue gas, a...

Embodiment 2

[0041] 1) For the high-concentration ammonia-nitrogen wastewater produced in the rare earth extraction process, 30-40m 3 The flow rate of / h flows into the reaction pool, and according to the dosage of 10-20kg CaO and CaS mixed reaction agent (including CaS0.4-0.5 kg / ton) per ton of waste water, it is added to the reaction pool to remove waste water. Various metal ions and F - , SO 4 2- Plasma;

[0042] 2) After fully reacting in the reaction tank for 2 hours, pump it into the sedimentation tank. After 2 hours of sedimentation, the waste water flows into the clear water tank, and the waste residue containing various metal ions is pumped into the waste residue recovery device for recycling through the sludge pump;

[0043] 3) The exhaust from the heating boiler contains CO 2 The waste flue gas is passed into the clear water pool, to Ca 2+ The content is below 0.01mol / L, filter and use the CO in the waste flue gas 2 Free Ca in precipitation wastewater 2+ Ions; use the str...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention discloses a deep treatment technology of high-ammonia nitrogen rare earth wet process-smelted saponifying wastewater. The technology is characterized by comprising the steps of: adding a reaction medicament into rare earth wet process-smelted extract liquor saponifying wastewater for reacting; precipitating after the reacting; separating out solid waste residue; feeding CO2-containing waste gas into clean water; leading the Ca2+ content in the wastewater to be less than 0.01mol / L; filtering; adjusting the PH value of the wastewater to be 10.5-11.0, and heating to be 55-65DEG C; feeding the adjusted wastewater into a deaminizing tower for performing negative pressure ammonia stilling type deamination; and adjusting the PH value of the wastewater to be 6-9 after the deaminizing. By matching the unslaked lime, the waste gas with the negative pressure stilled ammonia, the method can be used for removing not only various metal plasmas in the rare earth wet process-smelted extract liquor saponifying wastewater, such as F1<-> and SO4<2-> and the like, but also ignored calcium ions, so that the scaling problem of follow-up equipment is avoided, and the waste gas generated by a boiler is further treated.

Description

technical field [0001] The invention relates to the field of environmental protection, in particular to a method for advanced treatment of high ammonia nitrogen rare earth wet smelting wastewater. Background technique [0002] Rare earths are 15 lanthanide elements with atomic numbers from 57 to 71 in the third subgroup of Mendeleev's periodic table, namely lanthanum (La), cerium (Ce), praseodymium (Pr), neodymium (Nd), promethium (Pm ), samarium (Sm), europium (Eu), gadolinium (Gd), terbium (Tb), dysprosium (Dy), holmium (Ho), erbium (Er), thulium (Tm), ytterbium (Yb), lutetium (Lu ) and two other scandium (Sc) and yttrium (Y) with similar electronic structure and chemical properties, a total of 17 elements. Because of their special physical and chemical properties, they are widely used in high-tech industries such as metallurgical machinery, petrochemical industry, glass ceramics, agriculture, electronic information, biology, new materials, and new energy. China's emphas...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/10C01C1/02C02F103/16
CPCY02P20/141
Inventor 李祖华
Owner JIANGSU HUASHAN ENVIRONMENTAL PROTECTION TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap