Check patentability & draft patents in minutes with Patsnap Eureka AI!

Treatment system and method for recovering ammonium sulfate in rare earth wastewater by membrane method

A treatment system, ammonium sulfate technology, applied in water/sewage multi-stage treatment, water/sludge/sewage treatment, chemical instruments and methods, etc., can solve the problems of high operating costs, large carbon sources, and high treatment costs , to achieve the effect of simple production process, simple operation and small footprint

Pending Publication Date: 2022-07-12
张世文
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, the concentration of ammonium ions in rare earth mining and rare earth high-ammonium wastewater is as high as 150-5000 mg / L. Therefore, in addition to building a large biochemical pool, a large amount of carbon source needs to be added during operation, resulting in unacceptable production costs.
In addition, rare earth wastewater contains a large amount of ammonium sulfate. If it is directly treated, it will not only cause waste of ammonium sulfate resources, but also lead to high treatment costs.
The ammonia stripping method not only has high operating costs, but also has serious evaporator fouling and equipment corrosion

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
  • Treatment system and method for recovering ammonium sulfate in rare earth wastewater by membrane method
  • Treatment system and method for recovering ammonium sulfate in rare earth wastewater by membrane method
  • Treatment system and method for recovering ammonium sulfate in rare earth wastewater by membrane method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0061] see figure 1 and figure 2 In this embodiment, a membrane method for recovering ammonium sulfate and rare earth wastewater in rare earth wastewater includes a filter device, a disc tube type nanofiltration membrane filtration and separation device and a disc tube type reverse osmosis membrane filter and separation device. The filter is a V-type filter. The water outlet of the second dialysate storage tank 360 is connected to the metering tank of the rare earth wastewater treatment system and then discharged into the natural water body.

[0062] In this embodiment, see Table 2 for the water inflow index and outflow up-to-standard index of the rare earth wastewater to be treated.

[0063] Table 2

[0064] serial number project Water intake index (mg / L) Effluent compliance index (mg / L) Removal rate (%) 1 COD 25 20 20.00 2 BOD 10 6 40.00 3 SS 200 5 97.50 4 Total nitrogen (in N) 1630 1.5 99.91 5 Ammonia nitrogen ...

Embodiment 2

[0073] see figure 1 and figure 2 The ammonium sulfate recovery and wastewater treatment system for rare earth wastewater containing 1200 mg / L of ammonium sulfate provided in this embodiment includes a filtration device 100, a roll-type nanofiltration membrane filtration and separation device 200, and a disc-type reverse osmosis filtration, separation and concentration device 300. The filter is a multi-media filter. The water outlet of the second dialysate storage tank 360 is connected to the inlet of the metering tank, and is discharged into the natural water body after being measured by the metering tank.

[0074] In this embodiment, the inflow index and the effluent up-to-standard index of the rare earth high ammonia wastewater to be treated are shown in Table 4.

[0075] Table 4

[0076] serial number project Water intake index (mg / L) Effluent compliance index (mg / L) Removal rate (%) 1 COD 37 20 45.95 2 BOD 11 6 45.45 3 SS 70 ...

Embodiment 3

[0085] see image 3 and Figure 4 In this embodiment, a membrane method for recovering ammonium sulfate and rare earth wastewater from rare earth wastewater includes a microfiltration filtration device 100 , a nanofiltration membrane filtration and separation device 200 and a reverse osmosis membrane filtration and separation device 300 .

[0086] The microfiltration filter device 100 adopts a microfiltration membrane assembly 160', and the microfiltration membrane filter device 100 is used to filter and remove solid particulate impurities in rare earth wastewater to prevent subsequent membrane blockage.

[0087] The nanofiltration membrane filtration (separation and recovery of ammonium sulfate solution) device 200 adopts a roll-type nanofiltration membrane module 220 with a retention rate of magnesium sulfate ≥98%. The second high-pressure pump 210 is used to transport the filtrate obtained by filtering the rare earth wastewater to the roll-type nanofiltration membrane modu...

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 treatment system and method for recovering ammonium sulfate in rare earth wastewater through a membrane method. The system comprises a filtering device, a nanofiltration membrane filtering and separating device and a reverse osmosis membrane filtering and separating device. The invention provides a treatment system and method for recovering ammonium sulfate in rare earth wastewater and rare earth wastewater by a membrane method, aiming at the defects of the existing rare earth wastewater treatment process. The process flow is short, the occupied area is small, the investment is small, ammonium sulfate in the wastewater can be effectively recycled, the quality of treated effluent is high, the operation cost is low, the adaptability to the quality of the wastewater is high, and the continuous effect is good.

Description

technical field [0001] The invention belongs to the field of resource recycling and environmental protection, and in particular relates to a treatment system and method for recovering ammonium sulfate in rare earth wastewater by a membrane method. Background technique [0002] Rare earth (Rare earth) is a general term for lanthanide elements, scandium and yttrium in the periodic table of seventeen metal elements. It is a precious strategic resource. There are 250 rare earth minerals in nature. my country is a country with large rare earth resources and a large producer of rare earth products. Rare earth mining should be carried out according to different types of minerals, typically Baotou fluorocarbonate deposits and ionic rare earth deposits in the south. Ionic rare earth ore is the product of granite weathering and exists in the soil layer in an ionic state. The mining method is to soak the soil in an ammonium sulfate solution and replace the ionic rare earth elements in...

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): C02F9/02C02F101/10C02F101/16
CPCC02F1/001C02F1/444C02F1/441C02F1/442C02F2303/14C02F2101/101C02F2101/16
Inventor 张世文
Owner 张世文
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

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

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com