CN104609627B - The processing method of Rare Earth Production waste water and processing system - Google Patents
The processing method of Rare Earth Production waste water and processing system Download PDFInfo
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- CN104609627B CN104609627B CN201410804355.6A CN201410804355A CN104609627B CN 104609627 B CN104609627 B CN 104609627B CN 201410804355 A CN201410804355 A CN 201410804355A CN 104609627 B CN104609627 B CN 104609627B
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Abstract
The invention discloses the processing method of a kind of Rare Earth Production waste water and for implementing the processing system of the processing method of described Rare Earth Production waste water.The processing method of described Rare Earth Production waste water comprises the following steps: mother liquor of precipitation of ammonium carries out osmosis filtration, and obtains the first concentrated phase water and the first dilute phase water；First dilute phase water is mixed with precipitation wash water and obtains the first mixed liquor, the first mixed liquor is carried out osmosis filtration, and obtains the second concentrated phase water and the second dilute phase water；First concentrated phase water mixed with saponification waste-water and obtains the second mixed liquor, utilizing MVR vaporizer to be evaporated the second mixed liquor concentrating, and obtain condensed water and sodium chloride or ammonium chloride；Condensed water and the second dilute phase water are mixed and obtain the 3rd mixed liquor, the 3rd mixed liquor is carried out osmosis filtration, and obtains the 3rd concentrated phase water and the 3rd dilute phase water.The processing method of described Rare Earth Production waste water has the advantages such as operating cost is low, energy consumption is low, saving equipment occupation of land.
Description
Technical field
The present invention relates to the processing method of a kind of Rare Earth Production waste water, further relate to the processing system of a kind of Rare Earth Production waste water.
Background technology
The processing method of existing Rare Earth Production waste water utilizes triple effect evaporator to be evaporated Rare Earth Production waste water concentrating.Wherein,
Evaporate one ton of Rare Earth Production waste water to need to consume about 0.45 ton of steam, take around 90 yuan (price of steam is 200 yuan/
Ton).Therefore, the processing method of existing Rare Earth Production waste water has the defect that operating cost is high.
Summary of the invention
It is contemplated that at least solve one of technical problem present in prior art.To this end, one object of the present invention exists
In the processing method proposing a kind of Rare Earth Production waste water.
Further object is that the process system proposing a kind of processing method for implementing described Rare Earth Production waste water
System.
To achieve these goals, embodiment according to a first aspect of the present invention proposes the processing method of a kind of Rare Earth Production waste water,
Described Rare Earth Production waste water includes containing sodium chloride or the mother liquor of precipitation of ammonium of ammonium chloride, precipitation wash water containing sodium chloride or ammonium chloride
And containing sodium chloride or the saponification waste-water of ammonium chloride, the processing method of described Rare Earth Production waste water comprises the following steps: to institute
Stating mother liquor of precipitation of ammonium and carry out osmosis filtration, and obtain the first concentrated phase water and the first dilute phase water, wherein said first concentrated phase water contains
The sodium chloride of 10wt%-12wt% or ammonium chloride, described first dilute phase water contains the sodium chloride less than or equal to 0.1wt% or ammonium chloride；
Described first dilute phase water is mixed with described precipitation wash water and obtains the first mixed liquor, described first mixed liquor is carried out reverse osmosis
Filter, and obtain the second concentrated phase water and the second dilute phase water；Described first concentrated phase water is mixed with described saponification waste-water and obtains institute
State the second mixed liquor, utilize MVR vaporizer to be evaporated described second mixed liquor concentrating, and obtain condensed water and chlorination
Sodium or ammonium chloride；Mix with by described condensed water with described second dilute phase water and obtain the 3rd mixed liquor, to described 3rd mixing
Liquid carries out osmosis filtration, and obtains the 3rd concentrated phase water and the 3rd dilute phase water.
The processing method of Rare Earth Production waste water according to embodiments of the present invention is by relatively low to concentration first with osmosis filtration
Described mother liquor of precipitation of ammonium carries out primary concentration, such that it is able to reduce the stock solution amount entering vaporizer, thus can greatly reduce steaming
Send out energy consumption and the equipment investment of concentration process.Specifically, osmosis filtration is utilized to process the power consumption of one ton of described mother liquor of precipitation of ammonium
Amount is 3 kilowatt hour-8 kilowatt hours, about 1.5 yuan-4 yuan, thus can greatly reduce the process of described Rare Earth Production waste water
Cost.
And, the processing method of Rare Earth Production waste water according to embodiments of the present invention utilize MVR vaporizer to concentrate after described in
Mother liquor of precipitation of ammonium (the i.e. first concentrated phase water) and described saponification waste-water are evaporated concentrating, thus are possible not only to reduce Rare Earth Production and give up
The processing cost of water, and the floor space of the processing equipment of the processing method implementing described Rare Earth Production waste water can be reduced.
The processing method of existing Rare Earth Production waste water utilizes triple effect evaporator to be evaporated Rare Earth Production waste water concentrating.Wherein,
Evaporate one ton of Rare Earth Production waste water to need to consume about 0.45 ton of steam, take around 90 yuan (price of steam is 200 yuan/
Ton).And utilize MVR evaporator evaporation concentrate one ton of described second mixed liquor (described first concentrated phase water and described saponification waste-water
Mixture) power consumption be 40 kilowatt hour-60 kilowatt hours, about 20 yuan-30 yuan, the condensation of more than 90% can be saved simultaneously
Water, reduces by the equipment occupation of land of more than 50%.
Therefore, the processing method of Rare Earth Production waste water according to embodiments of the present invention has that operating cost is low, energy consumption is low, saves
The advantages such as equipment occupation of land, the waste water after process can directly discharge.
It addition, the processing method of Rare Earth Production waste water according to embodiments of the present invention can also have following additional technology spy
Levy:
According to one embodiment of present invention, described second concentrated phase water mixed with described mother liquor of precipitation of ammonium and obtain the 4th mixing
Liquid, carries out osmosis filtration, and obtains described first concentrated phase water and described first dilute phase water described 4th mixed liquor.Thus
Described second concentrated phase water can be further processed, such that it is able to enable the processing method of described Rare Earth Production waste water more
Well described Rare Earth Production waste water is processed.
According to one embodiment of present invention, described 3rd concentrated phase water, described first dilute phase water and described precipitation wash water are mixed,
And obtain described first mixed liquor.The processing method that thus can make described Rare Earth Production waste water forms the process of a closed loop and returns
Road, such that it is able to enable the processing method of described Rare Earth Production waste water preferably described Rare Earth Production waste water to be processed,
And after utilizing described processing method that described Rare Earth Production waste water is processed, do not produce the useless of any not up to discharge standard
Water.
According to one embodiment of present invention, the concentration of the sodium chloride in described 3rd dilute phase water or ammonium chloride is less than or equal to
5mg/L.Thus can reduce the impurity in described 3rd dilute phase water further, make described 3rd dilute phase water preferably meet discharge
Standard.
According to one embodiment of present invention, containing the sodium chloride less than or equal to 6wt% or ammonium chloride, institute in described mother liquor of precipitation of ammonium
State in precipitation wash water containing the sodium chloride less than or equal to 0.3wt% or ammonium chloride, containing being less than or equal in described saponification waste-water
The sodium chloride of 10wt% or ammonium chloride.
Embodiment according to a second aspect of the present invention proposes a kind of for implementing Rare Earth Production described according to a first aspect of the present invention
The processing system of the processing method of waste water, described processing system includes: for storing the first storage tank of described mother liquor of precipitation of ammonium；With
In described mother liquor of precipitation of ammonium carries out the first reverse osmosis unit of osmosis filtration, the import of described first reverse osmosis unit is with described
The outlet of the first storage tank is connected；For storing the second storage tank of described first mixed liquor, the import of described second storage tank is with described
The dilute phase water out of the first reverse osmosis unit is connected；For described first mixed liquor being carried out the second reverse osmosis of osmosis filtration
Device, the import of described second reverse osmosis unit is connected with the outlet of described second storage tank；For storing described second mixed liquor
The 3rd storage tank；For described second mixed liquor being evaporated the MVR vaporizer concentrated, the charging of described MVR vaporizer
Mouth is connected with the outlet of described 3rd storage tank；For storing the 4th storage tank of described 3rd mixed liquor, entering of described 4th storage tank
Mouth is connected with each in the dilute phase water out of the condensation-water drain of described MVR vaporizer and described second reverse osmosis unit；
With the 3rd reverse osmosis unit for described 3rd mixed liquor being carried out osmosis filtration, the import of described 3rd reverse osmosis unit
Outlet with described 4th storage tank is connected.
The processing system of the processing method for implementing described Rare Earth Production waste water according to embodiments of the present invention is by arranging and using
In the first reverse osmosis unit that the first storage tank storing described mother liquor of precipitation of ammonium is connected, such that it is able to first with osmosis filtration to dense
Spend relatively low described mother liquor of precipitation of ammonium and carry out primary concentration, and then the stock solution amount entering vaporizer can be reduced, thus can be very big
Ground reduces energy consumption and the equipment investment of evaporating concentration process.Specifically, osmosis filtration is utilized to process one ton of described precipitation mother
The power consumption of liquid is 3 kilowatt hour-8 kilowatt hours, about 1.5 yuan-4 yuan, thus can greatly reduce described Rare Earth Production and give up
The processing cost of water.
And, the processing system of the processing method for implementing described Rare Earth Production waste water according to embodiments of the present invention is by setting
Put MVR vaporizer, such that it is able to utilize MVR vaporizer to the described mother liquor of precipitation of ammonium (the i.e. first concentrated phase water) after concentrating and institute
State saponification waste-water to be evaporated concentrating, thus be possible not only to reduce the processing cost of Rare Earth Production waste water, and institute can be reduced
State the floor space of processing system.
According to one embodiment of present invention, the concentrated phase water out of described second reverse osmosis unit and the import of described first storage tank
It is connected.The structure that thus can make described processing system is more reasonable, such that it is able to preferably enter described Rare Earth Production waste water
Row processes.
According to one embodiment of present invention, the concentrated phase water out of described 3rd reverse osmosis unit and the import of described second storage tank
It is connected.The structure that thus can make described processing system is more reasonable, and described processing system can form the process of a closed loop
Loop, such that it is able to preferably process described Rare Earth Production waste water.Utilize described processing system to described Rare Earth Production
After waste water processes, do not produce the waste water of any not up to discharge standard.
According to one embodiment of present invention, described MVR vaporizer includes: vaporizer, the charging aperture of described vaporizer and institute
The outlet stating the 3rd storage tank is connected, and the condensation-water drain of described vaporizer is connected with the import of described 4th storage tank；Compressor,
The import of described compressor is connected with the steam (vapor) outlet of described vaporizer and exports the steam inlet with described vaporizer and is connected；With
Separator, described separator is connected with the discharging opening of described vaporizer.
According to one embodiment of present invention, described MVR vaporizer also includes preheater, and the import of described preheater is with described
The outlet of the 3rd storage tank is connected and outlet is connected with the charging aperture of described vaporizer.Described preheater thus can be utilized described
Second mixed liquor preheats, such that it is able to improve the evaporation efficiency of described vaporizer.
The additional aspect of the present invention and advantage will part be given in the following description, and part will become from the following description
Substantially, or by the practice of the present invention recognize.
Accompanying drawing explanation
Above-mentioned and/or the additional aspect of the present invention and advantage are from combining the accompanying drawings below description to embodiment and will become
Substantially with easy to understand, wherein:
Fig. 1 is the flow chart of the processing method of Rare Earth Production waste water according to embodiments of the present invention；
Fig. 2 is the MVR of the processing system of the processing method for implementing described Rare Earth Production waste water according to embodiments of the present invention
The structural representation of vaporizer.
Detailed description of the invention
Embodiments of the invention are described below in detail, and the example of described embodiment is shown in the drawings, the most from start to finish phase
Same or similar label represents same or similar element or has the element of same or like function.Below with reference to
The embodiment that accompanying drawing describes is exemplary, is only used for explaining the present invention, and is not considered as limiting the invention.
In describing the invention, it is to be understood that term " " center ", " longitudinally ", " laterally ", " on ",
D score, "front", "rear", "left", "right", " vertically ", " level ", " top ", " end ",
" interior ", " outward " etc. instruction orientation or position relationship be based on orientation shown in the drawings or position relationship, be only for
It is easy to describe the present invention and simplifying describe rather than instruction or the device of hint indication or element must have specifically
Orientation, with specific azimuth configuration and operation, be therefore not considered as limiting the invention.Additionally, term " the
One ", " second " is only used for describing purpose, and it is not intended that instruction or hint relative importance or implicit indicate
The quantity of indicated technical characteristic.Thus, define " first ", the feature of " second " can be expressed or hidden
One or more this feature are included containing ground.In describing the invention, except as otherwise noted, the containing of " multiple "
Justice is two or more.
In describing the invention, it should be noted that unless otherwise clearly defined and limited, term " install ",
" be connected ", " connection " should be interpreted broadly, and connects for example, it may be fixing, it is also possible to be to removably connect,
Or be integrally connected；Can be to be mechanically connected, it is also possible to be electrical connection；Can be to be joined directly together, it is also possible in by
Between medium be indirectly connected to, can be the connection of two element internals.For the ordinary skill in the art, may be used
Above-mentioned term concrete meaning in the present invention is understood with concrete condition.
Below with reference to the processing method of Fig. 1 description Rare Earth Production waste water according to embodiments of the present invention, wherein said Rare Earth Production
Waste water includes containing sodium chloride or the mother liquor of precipitation of ammonium of ammonium chloride, precipitation wash water containing sodium chloride or ammonium chloride and containing chlorination
Sodium or the saponification waste-water of ammonium chloride.The processing method of Rare Earth Production waste water according to embodiments of the present invention comprises the following steps:
Described mother liquor of precipitation of ammonium is carried out osmosis filtration, and obtains the first concentrated phase water and the first dilute phase water, wherein said first dense
Phase water contains sodium chloride or the ammonium chloride of 10wt%-12wt%, and described first dilute phase water contains the sodium chloride less than or equal to 0.1wt%
Or ammonium chloride.Wherein, described first concentrated phase water contains 10wt%-12wt% sodium chloride or ammonium chloride refer to: sodium chloride or chlorine
The mass percent changing ammonium and described first concentrated phase water is 10%-12%, as follows.
Described first dilute phase water is mixed with described precipitation wash water and obtains the first mixed liquor, described first mixed liquor is carried out instead
Permeation filtration, and obtain the second concentrated phase water and the second dilute phase water.
Described first concentrated phase water mixed with described saponification waste-water and obtains described second mixed liquor, utilizing MVR vaporizer to institute
State the second mixed liquor to be evaporated concentrating, and obtain condensed water and sodium chloride or ammonium chloride.
Described condensed water is mixed with described second dilute phase water and obtains the 3rd mixed liquor, described 3rd mixed liquor is carried out reverse osmosis
Through filter, and obtain the 3rd concentrated phase water and the 3rd dilute phase water.Wherein, described 3rd dilute phase water can reach discharge standard, i.e.
Described 3rd dilute phase water can directly emit.
The processing method of Rare Earth Production waste water according to embodiments of the present invention is by relatively low to concentration first with osmosis filtration
Described mother liquor of precipitation of ammonium carries out primary concentration, such that it is able to reduce the stock solution amount entering vaporizer, thus can greatly reduce steaming
Send out energy consumption and the equipment investment of concentration process.Specifically, osmosis filtration is utilized to process the power consumption of one ton of described mother liquor of precipitation of ammonium
Amount is 3 kilowatt hour-8 kilowatt hours, about 1.5 yuan-4 yuan, thus can greatly reduce the process of described Rare Earth Production waste water
Cost.
And, the processing method of Rare Earth Production waste water according to embodiments of the present invention utilize MVR vaporizer to concentrate after described in
Mother liquor of precipitation of ammonium (the i.e. first concentrated phase water) and described saponification waste-water are evaporated concentrating, thus are possible not only to reduce Rare Earth Production and give up
The processing cost of water, and the floor space of the processing equipment of the processing method implementing described Rare Earth Production waste water can be reduced.
The processing method of existing Rare Earth Production waste water utilizes triple effect evaporator to be evaporated Rare Earth Production waste water concentrating.Wherein,
Evaporate one ton of Rare Earth Production waste water to need to consume about 0.45 ton of steam, take around 90 yuan (price of steam is 200 yuan/
Ton).And utilize MVR evaporator evaporation concentrate one ton of described second mixed liquor (described first concentrated phase water and described saponification waste-water
Mixture) power consumption be 40 kilowatt hour-60 kilowatt hours, about 20 yuan-30 yuan, the condensation of more than 90% can be saved simultaneously
Water, reduces by the equipment occupation of land of more than 50%.
Therefore, the processing method of Rare Earth Production waste water according to embodiments of the present invention has that operating cost is low, energy consumption is low, saves
The advantages such as equipment occupation of land, the waste water after process can directly discharge.
Present invention also offers the process system of the processing method of a kind of Rare Earth Production waste water for implementing according to embodiments of the present invention
System.The processing system of the processing method for implementing described Rare Earth Production waste water according to embodiments of the present invention includes for storing
First storage tank of described mother liquor of precipitation of ammonium, for described mother liquor of precipitation of ammonium is carried out osmosis filtration the first reverse osmosis unit, for
Store the second storage tank of described first mixed liquor, for described first mixed liquor being carried out the second reverse osmosis dress of osmosis filtration
Put, for storing the 3rd storage tank of described second mixed liquor, steaming for the MVR being evaporated described second mixed liquor concentrating
Send out device 10, for storing the 4th storage tank of described 3rd mixed liquor and for described 3rd mixed liquor is carried out osmosis filtration
3rd reverse osmosis unit.
The import of described first reverse osmosis unit is connected with the outlet of described first storage tank, and the import of described second storage tank is with described
The dilute phase water out of the first reverse osmosis unit is connected, the outlet phase of the import of described second reverse osmosis unit and described second storage tank
Even.The charging aperture of MVR vaporizer 10 is connected with the outlet of described 3rd storage tank, and the import of described 4th storage tank is evaporated with MVR
The condensation-water drain of device 10 is connected with each in the dilute phase water out of described second reverse osmosis unit.Described 3rd reverse osmosis
The import of device is connected with the outlet of described 4th storage tank.
The processing system of the processing method for implementing described Rare Earth Production waste water according to embodiments of the present invention is by arranging and using
In the first reverse osmosis unit that the first storage tank storing described mother liquor of precipitation of ammonium is connected, such that it is able to first with osmosis filtration to dense
Spend relatively low described mother liquor of precipitation of ammonium and carry out primary concentration, and then the stock solution amount entering vaporizer can be reduced, thus can be very big
Ground reduces energy consumption and the equipment investment of evaporating concentration process.Specifically, osmosis filtration is utilized to process one ton of described precipitation mother
The power consumption of liquid is 3 kilowatt hour-8 kilowatt hours, about 1.5 yuan-4 yuan, thus can greatly reduce described Rare Earth Production and give up
The processing cost of water.
And, the processing system of the processing method for implementing described Rare Earth Production waste water according to embodiments of the present invention is by setting
Put MVR vaporizer 10, such that it is able to utilize MVR vaporizer 10 to the described mother liquor of precipitation of ammonium (the i.e. first concentrated phase water) after concentrating
It is evaporated concentrating with described saponification waste-water, thus is possible not only to reduce the processing cost of Rare Earth Production waste water, and can subtract
The floor space of little described processing system.
The processing method of existing Rare Earth Production waste water utilizes triple effect evaporator to be evaporated Rare Earth Production waste water concentrating.Wherein,
Evaporate one ton of Rare Earth Production waste water to need to consume about 0.45 ton of steam, take around 90 yuan (price of steam is 200 yuan/
Ton).And (described first concentrated phase water and described saponification are given up to utilize described second mixed liquor of MVR vaporizer 10 evaporation and concentration one ton
The mixture of water) power consumption be 40 kilowatt hour-60 kilowatt hours, about 20 yuan-30 yuan, simultaneously can save more than 90%
Condensed water, reduces by the equipment occupation of land of more than 50%.
As it is shown in figure 1, in some embodiments of the present invention, described second concentrated phase water can be mixed also with described mother liquor of precipitation of ammonium
Obtain the 4th mixed liquor, described 4th mixed liquor is carried out osmosis filtration, and obtains described first concentrated phase water and described first
Dilute phase water.Thus described second concentrated phase water can be further processed, such that it is able to make the place of described Rare Earth Production waste water
Described Rare Earth Production waste water can preferably be processed by reason method.
Correspondingly, the concentrated phase water out of described second reverse osmosis unit can be connected with the import of described first storage tank.Thus may be used
So that the structure of described processing system is more reasonable, such that it is able to preferably process described Rare Earth Production waste water.
As it is shown in figure 1, in one embodiment of the invention, can by described 3rd concentrated phase water, described first dilute phase water and
Described precipitation wash water mixes, and obtains described first mixed liquor.In other words, described first mixed liquor can include the described 3rd
Concentrated phase water, described first dilute phase water and described precipitation wash water.It is to say, can to described 3rd concentrated phase water, described first
Dilute phase water and described precipitation wash water carry out osmosis filtration, and obtain described second concentrated phase water and described second dilute phase water.Thus
The processing method that can make described Rare Earth Production waste water forms the treatment loop of a closed loop, such that it is able to make described Rare Earth Production
Described Rare Earth Production waste water can preferably be processed by the processing method of waste water, and utilizes described processing method to described
After Rare Earth Production waste water processes, do not produce the waste water of any not up to discharge standard.It is to say, utilize described process
After described Rare Earth Production waste water is processed by method, only produce described 3rd dilute phase water and the sodium chloride reaching discharge standard
Or ammonium chloride.
Correspondingly, the concentrated phase water out of described 3rd reverse osmosis unit can be connected with the import of described second storage tank.Thus may be used
So that the structure of described processing system is more reasonable, described processing system can form the treatment loop of a closed loop, thus can
Preferably described Rare Earth Production waste water is processed.Utilize described processing system that described Rare Earth Production waste water is processed
After, do not produce the waste water of any not up to discharge standard.It is to say, utilize described processing system that described Rare Earth Production is given up
After water processes, only produce and reach the described 3rd dilute phase water of discharge standard and sodium chloride or ammonium chloride.
Sodium chloride or the concentration of ammonium chloride in described 3rd dilute phase water can be less than or equal to 5mg/L.Thus can reduce further
Impurity in described 3rd dilute phase water, makes described 3rd dilute phase water preferably meet discharge standard.
Specifically, can be containing the sodium chloride less than or equal to 6wt% or ammonium chloride in described mother liquor of precipitation of ammonium, in described precipitation wash water
Can be containing the sodium chloride less than or equal to 0.3wt% or ammonium chloride, can be containing less than or equal to 10wt%'s in described saponification waste-water
Sodium chloride or ammonium chloride.
As in figure 2 it is shown, in some examples of the present invention, MVR vaporizer 10 can include vaporizer 100, compressor 200
With separator 300.The charging aperture of vaporizer 100 can be connected with the outlet of described 3rd storage tank, the condensation of vaporizer 100
Water out can be connected with the import of described 4th storage tank.The import of compressor 200 can be with the steam (vapor) outlet of vaporizer 100
It is connected and the outlet of compressor 200 can be connected with the steam inlet of vaporizer 100.Separator 300 can be with vaporizer 100
Discharging opening be connected.Sodium chloride or ammonium chloride can in separator 300 crystallization.
In an example of the present invention, as in figure 2 it is shown, MVR vaporizer 10 can also include preheater 400, preheater
The import of 400 can be connected with the outlet of described 3rd storage tank and the outlet of preheater 400 can be with the charging of vaporizer 100
Mouth is connected.Thus can utilize preheater 400 that described second mixed liquor is preheated, such that it is able to improve vaporizer 100
Evaporation efficiency.
Embodiment 1
Mother liquor of precipitation of ammonium is carried out osmosis filtration, and obtains the first concentrated phase water and the first dilute phase water.Wherein, described mother liquor of precipitation of ammonium
In containing the sodium chloride of 5wt%, described first concentrated phase water contains the sodium chloride of 10wt%, and described first dilute phase water contains 0.1wt%
Sodium chloride.Then described first dilute phase water is mixed and obtains the first mixed liquor with precipitation wash water, to described first mixed liquor
Carry out osmosis filtration, and obtain the second concentrated phase water and the second dilute phase water.Wherein, containing 0.3wt%'s in described precipitation wash water
Sodium chloride.
Described first concentrated phase water mixed with saponification waste-water and obtains described second mixed liquor, utilizing MVR vaporizer to described
Two mixed liquors are evaporated concentrating, and obtain condensed water and sodium chloride.Wherein, described saponification waste-water contains the chlorination of 10wt%
Sodium.Then described condensed water is mixed with described second dilute phase water and obtains the 3rd mixed liquor, described 3rd mixed liquor is carried out
Osmosis filtration, and obtain the 3rd concentrated phase water and the 3rd dilute phase water.Wherein, the concentration of the sodium chloride in described 3rd dilute phase water
For 10mg/L.
Described second concentrated phase water is mixed with described mother liquor of precipitation of ammonium and obtains the 4th mixed liquor, described 4th mixed liquor is carried out instead
Permeation filtration, and obtain described first concentrated phase water and described first dilute phase water.Further, by described 3rd concentrated phase water, described
One dilute phase water and the mixing of described precipitation wash water, and obtain described first mixed liquor.
Embodiment 2
Mother liquor of precipitation of ammonium is carried out osmosis filtration, and obtains the first concentrated phase water and the first dilute phase water.Wherein, described mother liquor of precipitation of ammonium
In containing the ammonium chloride of 6wt%, described first concentrated phase water contains the ammonium chloride of 12wt%, and described first dilute phase water contains 0.09wt%
Ammonium chloride.Then described first dilute phase water is mixed and obtains the first mixed liquor with precipitation wash water, to described first mixed liquor
Carry out osmosis filtration, and obtain the second concentrated phase water and the second dilute phase water.Wherein, containing 0.25wt% in described precipitation wash water
Ammonium chloride.
Described first concentrated phase water mixed with saponification waste-water and obtains described second mixed liquor, utilizing MVR vaporizer to described
Two mixed liquors are evaporated concentrating, and obtain condensed water and ammonium chloride.Wherein, described saponification waste-water contains the ammonium chloride of 8wt%.
Then described condensed water is mixed with described second dilute phase water and obtains the 3rd mixed liquor, described 3rd mixed liquor is carried out reverse osmosis
Through filter, and obtain the 3rd concentrated phase water and the 3rd dilute phase water.Wherein, the concentration of the ammonium chloride in described 3rd dilute phase water is
7mg/L。
Described second concentrated phase water is mixed with described mother liquor of precipitation of ammonium and obtains the 4th mixed liquor, described 4th mixed liquor is carried out instead
Permeation filtration, and obtain described first concentrated phase water and described first dilute phase water.Further, by described 3rd concentrated phase water, described
One dilute phase water and the mixing of described precipitation wash water, and obtain described first mixed liquor.
Embodiment 3
Mother liquor of precipitation of ammonium is carried out osmosis filtration, and obtains the first concentrated phase water and the first dilute phase water.Wherein, described mother liquor of precipitation of ammonium
In containing the sodium chloride of 5.5wt%, described first concentrated phase water contains the sodium chloride of 11wt%, and described first dilute phase water contains
The sodium chloride of 0.095wt%.Then described first dilute phase water is mixed with precipitation wash water and obtains the first mixed liquor, to described the
One mixed liquor carries out osmosis filtration, and obtains the second concentrated phase water and the second dilute phase water.Wherein, described precipitation wash water contains
The sodium chloride of 0.28wt%.
Described first concentrated phase water mixed with saponification waste-water and obtains described second mixed liquor, utilizing MVR vaporizer to described
Two mixed liquors are evaporated concentrating, and obtain condensed water and sodium chloride.Wherein, described saponification waste-water contains the sodium chloride of 9wt%.
Then described condensed water is mixed with described second dilute phase water and obtains the 3rd mixed liquor, described 3rd mixed liquor is carried out reverse osmosis
Through filter, and obtain the 3rd concentrated phase water and the 3rd dilute phase water.Wherein, the concentration of the sodium chloride in described 3rd dilute phase water is
5mg/L。
Described second concentrated phase water is mixed with described mother liquor of precipitation of ammonium and obtains the 4th mixed liquor, described 4th mixed liquor is carried out instead
Permeation filtration, and obtain described first concentrated phase water and described first dilute phase water.Further, by described 3rd concentrated phase water, described
One dilute phase water and the mixing of described precipitation wash water, and obtain described first mixed liquor.
In the description of this specification, reference term " embodiment ", " some embodiments ", " illustrative examples ", " show
Example ", the description of " concrete example " or " some examples " etc. means to combine this embodiment or example describes specific features, knot
Structure, material or feature are contained at least one embodiment or the example of the present invention.In this manual, to above-mentioned term
Schematic representation be not necessarily referring to identical embodiment or example.And, the specific features of description, structure, material or
Person's feature can combine in any one or more embodiments or example in an appropriate manner.
Although an embodiment of the present invention has been shown and described, it will be understood by those skilled in the art that: do not taking off
In the case of the principles and objective of the present invention, these embodiments can be carried out multiple change, revise, replace and modification,
The scope of the present invention is limited by claim and equivalent thereof.
Claims (10)
1. a processing method for Rare Earth Production waste water, described Rare Earth Production waste water includes the precipitation containing sodium chloride or ammonium chloride
Mother solution, precipitation wash water containing sodium chloride or ammonium chloride and containing sodium chloride or the saponification waste-water of ammonium chloride, it is characterised in that
Comprise the following steps:
Described mother liquor of precipitation of ammonium is carried out osmosis filtration, and obtains the first concentrated phase water and the first dilute phase water, wherein said first dense
Phase water contains sodium chloride or the ammonium chloride of 10wt%-12wt%, and described first dilute phase water contains the sodium chloride less than or equal to 0.1wt%
Or ammonium chloride；
Described first dilute phase water is mixed with described precipitation wash water and obtains the first mixed liquor, described first mixed liquor is carried out instead
Permeation filtration, and obtain the second concentrated phase water and the second dilute phase water；
Described first concentrated phase water mixed with described saponification waste-water and obtains the second mixed liquor, utilizing MVR vaporizer to described
Two mixed liquors are evaporated concentrating, and obtain condensed water and sodium chloride or ammonium chloride；With
Described condensed water is mixed with described second dilute phase water and obtains the 3rd mixed liquor, described 3rd mixed liquor is carried out reverse osmosis
Through filter, and obtain the 3rd concentrated phase water and the 3rd dilute phase water.
The processing method of Rare Earth Production waste water the most according to claim 1, it is characterised in that by described second concentrated phase water
Mix with described mother liquor of precipitation of ammonium and obtain the 4th mixed liquor, described 4th mixed liquor being carried out osmosis filtration, and obtains described
First concentrated phase water and described first dilute phase water.
The processing method of Rare Earth Production waste water the most according to claim 1, it is characterised in that by described 3rd concentrated phase water,
Described first dilute phase water and the mixing of described precipitation wash water, and obtain described first mixed liquor.
The processing method of Rare Earth Production waste water the most according to claim 1, it is characterised in that in described 3rd dilute phase water
Sodium chloride or the concentration of ammonium chloride less than or equal to 5mg/L.
5. according to the processing method of the Rare Earth Production waste water according to any one of claim 1-4, it is characterised in that described heavy
Containing the sodium chloride less than or equal to 6wt% or ammonium chloride in the mother solution of shallow lake, containing the chlorine less than or equal to 0.3wt% in described precipitation wash water
Change sodium or ammonium chloride, containing the sodium chloride less than or equal to 10wt% or ammonium chloride in described saponification waste-water.
6. for implementing a processing system for the processing method of Rare Earth Production waste water according to claim 1, its feature
It is, including:
For storing the first storage tank of described mother liquor of precipitation of ammonium；
For described mother liquor of precipitation of ammonium being carried out the first reverse osmosis unit of osmosis filtration, the import of described first reverse osmosis unit
Outlet with described first storage tank is connected；
For storing the second storage tank of described first mixed liquor, the import of described second storage tank and described first reverse osmosis unit
Dilute phase water out is connected；
For described first mixed liquor being carried out the second reverse osmosis unit of osmosis filtration, entering of described second reverse osmosis unit
Mouth is connected with the outlet of described second storage tank；
For storing the 3rd storage tank of described second mixed liquor；
For described second mixed liquor is evaporated the MVR vaporizer concentrated, the charging aperture of described MVR vaporizer is with described
The outlet of the 3rd storage tank is connected；
For storing the 4th storage tank of described 3rd mixed liquor, the import of described 4th storage tank and the condensation of described MVR vaporizer
Water out is connected with each in the dilute phase water out of described second reverse osmosis unit；With
For described 3rd mixed liquor being carried out the 3rd reverse osmosis unit of osmosis filtration, entering of described 3rd reverse osmosis unit
Mouth is connected with the outlet of described 4th storage tank.
The processing system of the processing method for implementing described Rare Earth Production waste water the most according to claim 6, its feature
Being, the concentrated phase water out of described second reverse osmosis unit is connected with the import of described first storage tank.
The processing system of the processing method for implementing described Rare Earth Production waste water the most according to claim 6, its feature
Being, the concentrated phase water out of described 3rd reverse osmosis unit is connected with the import of described second storage tank.
9. according to the process system of the processing method for implementing described Rare Earth Production waste water according to any one of claim 6-8
System, it is characterised in that described MVR vaporizer includes:
Vaporizer, the charging aperture of described vaporizer is connected with the outlet of described 3rd storage tank, the condensation-water drain of described vaporizer
Import with described 4th storage tank is connected；
Compressor, the import of described compressor is connected with the steam (vapor) outlet of described vaporizer and exports the steam with described vaporizer
Entrance is connected；With
Separator, described separator is connected with the discharging opening of described vaporizer.
The processing system of the processing method for implementing described Rare Earth Production waste water the most according to claim 9, it is special
Levying and be, described MVR vaporizer also includes preheater, the import of described preheater be connected with the outlet of described 3rd storage tank and
Outlet is connected with the charging aperture of described vaporizer.
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| CN103449653B (en) * | 2013-08-19 | 2014-07-23 | 燕山大学 | Combined treatment method for sodium chloride-containing wastewater generated in dressing and smelting of rare earth |
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