CN220665121U - Waste water treatment equipment - Google Patents
Waste water treatment equipment Download PDFInfo
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- CN220665121U CN220665121U CN202322350052.9U CN202322350052U CN220665121U CN 220665121 U CN220665121 U CN 220665121U CN 202322350052 U CN202322350052 U CN 202322350052U CN 220665121 U CN220665121 U CN 220665121U
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- 238000004065 wastewater treatment Methods 0.000 title claims abstract description 35
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 120
- 239000011777 magnesium Substances 0.000 claims abstract description 64
- 229910052749 magnesium Inorganic materials 0.000 claims abstract description 64
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims abstract description 62
- 238000004064 recycling Methods 0.000 claims abstract description 40
- CSNNHWWHGAXBCP-UHFFFAOYSA-L Magnesium sulfate Chemical compound [Mg+2].[O-][S+2]([O-])([O-])[O-] CSNNHWWHGAXBCP-UHFFFAOYSA-L 0.000 claims abstract description 29
- 238000002386 leaching Methods 0.000 claims abstract description 24
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 22
- 239000002351 wastewater Substances 0.000 claims abstract description 18
- 229910052500 inorganic mineral Inorganic materials 0.000 claims abstract description 16
- 235000010755 mineral Nutrition 0.000 claims abstract description 16
- 239000011707 mineral Substances 0.000 claims abstract description 16
- 229910052943 magnesium sulfate Inorganic materials 0.000 claims abstract description 15
- 235000019341 magnesium sulphate Nutrition 0.000 claims abstract description 15
- 239000012716 precipitator Substances 0.000 claims abstract description 15
- 239000002893 slag Substances 0.000 claims abstract description 11
- 239000002253 acid Substances 0.000 claims abstract description 10
- 239000003513 alkali Substances 0.000 claims abstract description 8
- 239000012535 impurity Substances 0.000 claims description 27
- 239000010802 sludge Substances 0.000 claims description 18
- 239000013505 freshwater Substances 0.000 claims description 16
- 238000011084 recovery Methods 0.000 claims description 15
- 238000004891 communication Methods 0.000 claims description 7
- 239000012141 concentrate Substances 0.000 claims description 7
- 238000000034 method Methods 0.000 abstract description 11
- 239000007788 liquid Substances 0.000 abstract description 6
- 239000013049 sediment Substances 0.000 abstract description 3
- 239000002699 waste material Substances 0.000 abstract description 2
- HEMHJVSKTPXQMS-UHFFFAOYSA-M sodium hydroxide Inorganic materials [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 30
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 description 20
- 239000000243 solution Substances 0.000 description 14
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 12
- 150000002500 ions Chemical class 0.000 description 8
- 238000003756 stirring Methods 0.000 description 8
- 238000006243 chemical reaction Methods 0.000 description 6
- 150000001450 anions Chemical class 0.000 description 5
- 238000000909 electrodialysis Methods 0.000 description 5
- 239000012528 membrane Substances 0.000 description 5
- 229910052761 rare earth metal Inorganic materials 0.000 description 5
- 150000001768 cations Chemical class 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 150000002910 rare earth metals Chemical class 0.000 description 4
- 238000010612 desalination reaction Methods 0.000 description 3
- VTHJTEIRLNZDEV-UHFFFAOYSA-L magnesium dihydroxide Chemical compound [OH-].[OH-].[Mg+2] VTHJTEIRLNZDEV-UHFFFAOYSA-L 0.000 description 3
- 239000000347 magnesium hydroxide Substances 0.000 description 3
- 229910001862 magnesium hydroxide Inorganic materials 0.000 description 3
- 238000000746 purification Methods 0.000 description 3
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 description 2
- 230000005684 electric field Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000012466 permeate Substances 0.000 description 2
- OTYBMLCTZGSZBG-UHFFFAOYSA-L potassium sulfate Chemical compound [K+].[K+].[O-]S([O-])(=O)=O OTYBMLCTZGSZBG-UHFFFAOYSA-L 0.000 description 2
- 229910052939 potassium sulfate Inorganic materials 0.000 description 2
- 235000011151 potassium sulphates Nutrition 0.000 description 2
- 239000002244 precipitate Substances 0.000 description 2
- 238000001556 precipitation Methods 0.000 description 2
- -1 rare earth magnesium sulfate Chemical class 0.000 description 2
- 229910052938 sodium sulfate Inorganic materials 0.000 description 2
- 235000011152 sodium sulphate Nutrition 0.000 description 2
- 238000001179 sorption measurement Methods 0.000 description 2
- NWUYHJFMYQTDRP-UHFFFAOYSA-N 1,2-bis(ethenyl)benzene;1-ethenyl-2-ethylbenzene;styrene Chemical compound C=CC1=CC=CC=C1.CCC1=CC=CC=C1C=C.C=CC1=CC=CC=C1C=C NWUYHJFMYQTDRP-UHFFFAOYSA-N 0.000 description 1
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 1
- 235000011941 Tilia x europaea Nutrition 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 238000005349 anion exchange Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 238000005341 cation exchange Methods 0.000 description 1
- 239000000701 coagulant Substances 0.000 description 1
- 229920001577 copolymer Polymers 0.000 description 1
- 238000011033 desalting Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 229910001653 ettringite Inorganic materials 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 239000011152 fibreglass Substances 0.000 description 1
- 239000000706 filtrate Substances 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 235000013305 food Nutrition 0.000 description 1
- 239000008233 hard water Substances 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 239000003456 ion exchange resin Substances 0.000 description 1
- 229920003303 ion-exchange polymer Polymers 0.000 description 1
- 239000004571 lime Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 229920000915 polyvinyl chloride Polymers 0.000 description 1
- 239000004800 polyvinyl chloride Substances 0.000 description 1
- 229910052700 potassium Inorganic materials 0.000 description 1
- 239000012266 salt solution Substances 0.000 description 1
- 239000013535 sea water Substances 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 159000000000 sodium salts Chemical class 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000002910 solid waste Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000006228 supernatant Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Abstract
The application discloses waste water treatment equipment relates to waste water treatment technical field. The waste water treatment equipment is used for treating mineral leaching waste water taking magnesium sulfate as a mineral leaching agent and comprises a magnesium collecting device and a recycling treatment device, wherein the magnesium collecting device comprises a magnesium collecting reactor, a precipitator and a press filter which are sequentially communicated, the precipitator is provided with a third water outlet, and the press filter is provided with a fourth water outlet and a magnesium slag outlet; the recycling device comprises a recycling processor, the recycling processor is provided with a seventh water inlet, an alkali liquor outlet and an acid liquor outlet, and the third water outlet and the fourth water outlet are respectively communicated with the seventh water inlet. The application provides a waste water treatment equipment can carry out recycle respectively with magnesium sediment and acid, alkali waste liquid that waste water treatment in-process produced.
Description
Technical Field
The application relates to the technical field of wastewater treatment, in particular to wastewater treatment equipment.
Background
The recycling treatment of the magnesium sulfate leaching wastewater is a future development trend, and the recovery of valuable resources in the leaching wastewater by adopting a proper technical means has attracted a great deal of attention. The existing method for treating the magnesium sulfate leaching wastewater comprises a lime neutralization method, an evaporation concentration method, an ettringite precipitation method and the like. The three methods have various problems such as environment, cost and the like in practical production and application. Specifically, the three methods all generate a large amount of solid waste without utilization value, the recovery of resources is omitted, the operation cost is high, and the recycling treatment device of the rare earth magnesium sulfate leaching wastewater cannot be widely applied.
Disclosure of Invention
In view of this, the purpose of this application is in order to overcome the not enough in the prior art, and this application provides a waste water treatment facilities to solve the technical problem that waste water treatment facilities can't realize resource recycling among the prior art.
The present application provides:
a wastewater treatment apparatus for treating mineral leaching wastewater containing magnesium sulfate as a mineral leaching agent, comprising:
the magnesium collecting device comprises a magnesium collecting reactor, a precipitator and a press filter which are sequentially communicated, wherein the precipitator is provided with a third water outlet, and the press filter is provided with a fourth water outlet and a magnesium slag outlet;
the recycling device comprises a recycling processor, wherein the recycling processor is provided with a seventh water inlet, an alkali liquor outlet and an acid liquor outlet, and the third water outlet and the fourth water outlet are respectively communicated with the seventh water inlet.
In addition, the wastewater treatment device according to the application can also have the following additional technical characteristics:
in some embodiments of the present application, the magnesium-collecting reactor is further provided with a magnesium-collecting agent inlet, and the magnesium-collecting agent inlet is communicated with the alkali liquor outlet.
In some embodiments of the present application, the precipitator is further provided with a sludge outlet, the filter press is further provided with a sludge inlet, and the sludge outlet is communicated with the sludge inlet.
In some embodiments of the present application, the wastewater treatment apparatus further comprises a storage vessel in communication with the magnesium-receiving reactor.
In some embodiments of the present application, the wastewater treatment device further comprises a purification device and a concentration device, wherein the magnesium collection device, the purification device, the concentration device and the recycling device are sequentially communicated.
In some embodiments of the present application, the impurity removing device includes an impurity removing reactor, the impurity removing reactor is provided with a fifth water inlet and a fifth water outlet, and the third water outlet and the fourth water outlet are respectively communicated with the fifth water inlet.
In some embodiments of the present application, the concentrating device comprises a concentrator provided with a sixth water inlet, a concentrate outlet, a first fresh water outlet, a first polar water inlet, and a first polar water outlet;
the fifth water outlet is communicated with the sixth water inlet, the first fresh water outlet is communicated with the storage container, and the first polar water inlet and the first polar water outlet are externally connected with polar water which circularly flows.
In some embodiments of the present application, the concentrate outlet communicates with the seventh water inlet.
In some embodiments of the present application, the recycling processor is further provided with a second polar water inlet and a second polar water outlet, the second polar water inlet and the second polar water outlet being externally connected with polar water which circularly flows.
In some embodiments of the present application, the recycling processor is further provided with a second fresh water outlet, and the second fresh water outlet is communicated with the sixth water inlet.
Compared with the prior art, the beneficial effects of this application are: the application provides a waste water treatment equipment, including except that magnesium device and resourceful device, except that magnesium device can produce magnesium sediment, and resourceful device can produce except that magnesium device exhaust waste water is handled and is produced except that magnesium agent and discharge from the alkali lye export, produces sulfuric acid and discharges from the acid liquor export, and magnesium sediment and sulfuric acid reaction become magnesium sulfate and carry out recycle as the mineral leaching agent, except that magnesium agent direct import except that recycle in the magnesium reactor.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered limiting the scope, and that other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 illustrates a schematic diagram of a wastewater treatment facility in some embodiments of the present application;
fig. 2 shows a schematic structural view of a wastewater treatment apparatus in some embodiments of the present application.
Description of main reference numerals: 100-a wastewater treatment facility; 110-a storage container; 111-a first water inlet; 112-a first water outlet; 120-magnesium collecting device; 121-a magnesium recovery reactor; 1211-a second water inlet; 1212-a second water outlet; 1213-magnesium-collecting agent inlet; 122-precipitator; 1221-a third water inlet; 1222-a third water outlet; 1223-a sludge discharge port; 123-press filter; 1231-mud inlet; 1232-magnesium slag outlet; 1233-fourth water outlet; 130-a impurity removing device; 131-a impurity removal reactor; 1311-fifth water inlet; 1312-a fifth water outlet; 1313-exhaust ports; 1314-evacuation port; 140-concentrating means; 141-a concentrator; 1411-sixth water inlet; 1412—a concentrate outlet; 1413-a first fresh water outlet; 1414-a first pole water inlet; 1415-a first pole water outlet; 150-a recycling device; 151-a recycling processor; 1511-seventh water inlet; 1512-second water inlet; 1513-a second water outlet; 1514-lye outlet; 1515-acid liquor outlet; 1516-a second fresh water outlet.
Detailed Description
Embodiments of the present application are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary only for the purpose of explaining the present application and are not to be construed as limiting the present application.
In the description of the present application, it should be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," etc. indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, are merely for convenience in describing the present application and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be configured and operated in a particular orientation, and therefore should not be construed as limiting the present application.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present application, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.
In this application, unless specifically stated and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art as the case may be.
In this application, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.
As shown in fig. 1 and 2, the examples of the present application provide a wastewater treatment apparatus 100 for treating mineral leaching wastewater having magnesium sulfate as a mineral leaching agent, and in particular, in the present embodiment, the wastewater treatment apparatus 100 is for treating ion type rare earth mineral leaching wastewater having magnesium sulfate as a mineral leaching agent.
The wastewater treatment apparatus 100 includes a storage vessel 110, a magnesium collecting device 120, a impurity removing device 130, a concentrating device 140, and a recycling device 150, which are sequentially connected.
The storage container 110 is provided with a first water inlet 111 and a first water outlet 112.
The magnesium collecting device 120 comprises a magnesium collecting reactor 121, a precipitator 122 and a press filter 123 which are sequentially communicated. The magnesium collecting reactor 121 is provided with a second water inlet 1211 and a second water outlet 1212, the precipitator 122 is provided with a third water inlet 1221, a third water outlet 1222 and a sludge outlet 1223, and the filter press 123 is provided with a sludge inlet 1231, a magnesium slag outlet 1232 and a fourth water outlet 1233.
Wherein the first water outlet 112 is in communication with the second water inlet 1211, the second water outlet 1212 is in communication with the third water inlet 1221, and the sludge discharge 1223 is in communication with the sludge inlet 1231.
In the present embodiment, the settler 122 is a tube settler 122.
The inclined tube precipitator is an inclined tube which adopts ethylene-propylene copolymer, glass fiber reinforced plastic or polyvinyl chloride honeycomb, the inclined angle is 60 ℃, the inclined length is 1m, the diameter of an inscribed circle is not equal to 35-50MM, and the diameter of the inscribed circle can be changed according to water quality so as to achieve the optimal precipitation effect. The factory can design and process the inclined tube precipitator according to the user requirements or the test data of raw wastewater, and coagulant is generally added when the inclined tube precipitator is used. The inclined plate inclined tube sedimentation device is solid-liquid separation equipment with advanced technical performance, and is generally matched with other sewage purification equipment.
The magnesium slag outlet 1232 of the press filter 123 is used for outputting magnesium slag, and the magnesium slag has magnesium hydroxide as a main component.
The magnesium recovery reactor 121 is also provided with a magnesium recovery agent inlet 1213 for injecting magnesium recovery agent. In this embodiment, the magnesium-collecting agent is sodium hydroxide or potassium hydroxide.
The magnesium recovery reactor 121 takes the form of a reaction vessel, which may be cylindrical or other shape. The magnesium collecting reactor 121 is also provided with a stirring rod, and the stirring plate stirs the liquid in the magnesium collecting reactor 121, so that the magnesium collecting efficiency is improved.
The impurity removing device 130 includes an impurity removing reactor 131, and the impurity removing reactor 131 is provided with a fifth water inlet 1311, a fifth water outlet 1312, an air outlet 1313, an evacuation outlet 1314 and a backwash water outlet (not shown).
Wherein the third water outlet 1222 and the fourth water outlet 1233 are respectively communicated with the fifth water inlet 1311.
The impurity removal reactor 131 takes the form of a reaction vessel, which may be cylindrical or other shape. The impurity removal reactor 131 is also provided with a stirring rod, and the stirring plate stirs the liquid in the impurity removal reactor 131, so that the impurity removal efficiency is improved.
In the present embodiment, the impurity removal reactor 131 is provided with an adsorption column, and impurities are removed by adsorption with ion exchange resin, so that waste having no utilization value is not generated, and the purity of resources generated by the subsequent recycling device 150 is improved.
The concentrating device 140 comprises a concentrator 141, in this embodiment the concentrator 141 is an electrodialysis concentrator 141. The concentrator 141 is provided with a sixth water inlet 1411, a concentrate outlet 1412, a first fresh water outlet 1413, a first pole water inlet 1414 and a first pole water outlet 1415.
Electrodialysis is a mature water treatment technology, and utilizes the selective permeability of anion and cation exchange membranes, wherein the cation membrane allows cations in liquid to permeate and block anions, and the anion membrane allows anions in liquid to permeate and block cations; under the action of an external electric field, ions in water selectively move directionally to separate anions from cations in the water, namely, the number of the ions in one part is reduced, and the number of the ions in the other part is increased, so that a concentrated solution and a dilute solution are formed, and the purpose of desalting is achieved; because of the characteristics of low energy consumption, large water yield, high desalination rate, low maintenance cost, strong stability and the like, the water-based desalination device is widely used in the aspects of medicine, electronics, chemical industry, food, hard water softening, sea water desalination and the like.
Wherein, the fifth water outlet 1312 is communicated with the sixth water inlet 1411, the first fresh water outlet 1413 is communicated with the first water inlet 111, and the first polar water inlet 1414 and the first polar water outlet 1415 are externally connected with polar water which circularly flows.
In this embodiment, the polar water is electrodialysis polar water, which is generally a sodium salt solution, and has extremely low divalent ion content and little scale formation. Polar water is driven by electric field force to gradually enter electrodialysis polar water circulation through the osmosis process.
The recycling apparatus 150 includes a recycling processor 151, and in this embodiment, the recycling processor 151 is an electrodialysis recycling processor 151. The recycling processor 151 is provided with a seventh water inlet 1511, a second water inlet 1512, a second water outlet 1513, a lye outlet 1514, an acid outlet 1515, and a second fresh water outlet 1516.
Wherein the concentrated water outlet 1412 and the seventh water inlet 1511 are communicated, the second water inlet 1512 and the second water outlet 1513 are used for externally connecting the circulating flowing water, and the second fresh water outlet 1516 and the sixth water inlet 1411 are communicated.
The recycling processor 151 generates and discharges sulfuric acid from the acid outlet 1515, which may treat the magnesium slag generated by the press filter 123 to obtain a magnesium sulfate leaching agent for leaching.
The recycling processor 151 discharges sodium hydroxide or potassium hydroxide, and feeds the discharged sodium hydroxide or potassium hydroxide into the magnesium collector inlet 1213 of the magnesium collector reactor 121, thereby recycling the magnesium collector.
Specifically, sodium hydroxide and potassium hydroxide are added into magnesium sulfate in the wastewater to react to generate sodium sulfate, potassium sulfate solution and magnesium hydroxide precipitate, and the magnesium hydroxide precipitate is discharged from the press filter 123 after being collected; the sodium sulfate and potassium sulfate solution enters the impurity removing device 130, the concentrating device 140 and the recycling device 150 to be subjected to impurity removing, concentrating and recycling treatment respectively. Wherein, the recycling processor 151 is provided with a bipolar membrane, and H is separated by the bipolar membrane 2 O is decomposed into H + And OH (OH) - ，H + With SO 4 2- Combined with sulfuric acid, OH - Combined with Na or K to become sodium hydroxide or potassium hydroxide.
The principle of the wastewater treatment device 100 for treating the ion type rare earth mineral leaching wastewater by taking magnesium sulfate as mineral leaching agent is as follows:
the ion type rare earth leaching wastewater is stored in the storage container 110, so that centralized treatment is facilitated, and the treatment efficiency is improved.
The waste water in the storage vessel 110 enters a magnesium collecting reactor 121, and a magnesium collecting agent is added in the magnesium collecting reactor 121, wherein the magnesium collecting agent is sodium hydroxide or potassium hydroxide. The stirring rod stirs the solution in the magnesium collecting reactor 121 to accelerate the magnesium collecting reaction, and after the magnesium collecting reaction is finished, the magnesium concentration of the solution in the magnesium collecting reactor 121 is reduced to below 0.1 mg/L.
The solution after completion of the magnesium recovery reaction is introduced from the magnesium recovery reactor 121 into the precipitator 122 to be settled. Supernatant fluid is discharged into the impurity removal reactor 131, bottom sludge enters a sludge inlet 1231 of the filter press 123 through a sludge discharge port 1223, the filter press 123 is used for press-filtering the sludge, a press-filtered sludge cake is magnesium slag, and filtrate is discharged into the impurity removal reactor 131.
The impurity removing reactor 131 adsorbs and removes impurities from the solution, and further removes impurity ions such as calcium, magnesium and the like in the solution.
The solution after the impurity removal enters a concentrator 141, the concentrator 141 concentrates the leaching wastewater TDS (Total dissolved solids ) to more than 10%, the concentrated solution is discharged from a concentrated water outlet 1412, and the produced fresh water is returned to the storage container 110 through a first fresh water outlet 1413 for recycling.
The concentrated solution enters the recycling processor 151 from the concentrated water outlet 1412, the recycling processor 151 processes the concentrated solution to generate sodium hydroxide or potassium hydroxide solution with the concentration not lower than 2%, and the sodium hydroxide or the potassium hydroxide solution is discharged from the alkali liquor outlet 1514 and is put into the magnesium collecting reactor 121 for recycling; meanwhile, the recycling processor 151 processes and generates sulfuric acid with a concentration of not less than 2%, the sulfuric acid is discharged from the acid liquor outlet 1515 and reacts with magnesium slag generated by the press filter 123 to obtain magnesium sulfate, and the magnesium sulfate is reused as a mineral leaching agent.
The waste water treatment equipment 100 of the application is used for carrying out magnesium recovery, impurity removal, concentration and recycling treatment on the ionic rare earth mineral leaching waste water taking magnesium sulfate as a mineral leaching agent, so that the magnesium recovery rate in the waste water can reach 99.9%, the hardness of impurity removal effluent is less than 0.2g/L, the concentration of the obtained acid is 2.8%, and the concentration of the obtained alkali is 2.8%.
In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present application. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.
Although embodiments of the present application have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the application, and that variations, modifications, alternatives, and variations may be made to the above embodiments by one of ordinary skill in the art within the scope of the application.
Claims (10)
1. A wastewater treatment apparatus for treating mineral leaching wastewater containing magnesium sulfate as a mineral leaching agent, comprising:
the magnesium collecting device comprises a magnesium collecting reactor, a precipitator and a press filter which are sequentially communicated, wherein the precipitator is provided with a third water outlet, and the press filter is provided with a fourth water outlet and a magnesium slag outlet;
the recycling device comprises a recycling processor, wherein the recycling processor is provided with a seventh water inlet, an alkali liquor outlet and an acid liquor outlet, and the third water outlet and the fourth water outlet are respectively communicated with the seventh water inlet.
2. The wastewater treatment apparatus according to claim 1, wherein the magnesium recovery reactor is further provided with a magnesium recovery agent inlet, the magnesium recovery agent inlet being in communication with the lye outlet.
3. The wastewater treatment apparatus according to claim 1, wherein the precipitator is further provided with a sludge discharge port, the filter press is further provided with a sludge inlet, and the sludge discharge port is communicated with the sludge inlet.
4. The wastewater treatment plant of claim 1, further comprising a storage vessel in communication with the magnesium recovery reactor.
5. The wastewater treatment apparatus according to claim 4, wherein the wastewater treatment apparatus comprises a purifying device and a concentrating device, and the magnesium collecting device, the purifying device, the concentrating device and the recycling device are sequentially communicated.
6. The wastewater treatment apparatus according to claim 5, wherein the impurity removal device comprises an impurity removal reactor provided with a fifth water inlet and a fifth water outlet, and the third water outlet and the fourth water outlet are respectively communicated with the fifth water inlet.
7. The wastewater treatment apparatus of claim 6, wherein the concentrating device comprises a concentrator having a sixth water inlet, a concentrate outlet, a first fresh water outlet, a first polar water inlet, and a first polar water outlet;
the fifth water outlet is communicated with the sixth water inlet, the first fresh water outlet is communicated with the storage container, and the first polar water inlet and the first polar water outlet are externally connected with polar water which circularly flows.
8. The wastewater treatment apparatus of claim 7, wherein the concentrate outlet and the seventh water inlet communicate.
9. The wastewater treatment apparatus of claim 7, wherein the recycling processor is further provided with a second polar water inlet and a second polar water outlet, the second polar water inlet and the second polar water outlet being externally connected with polar water which circularly flows.
10. The wastewater treatment plant of claim 7, wherein the recycling processor is further provided with a second fresh water outlet, the second fresh water outlet being in communication with the sixth water inlet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322350052.9U CN220665121U (en) | 2023-08-30 | 2023-08-30 | Waste water treatment equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322350052.9U CN220665121U (en) | 2023-08-30 | 2023-08-30 | Waste water treatment equipment |
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| Publication Number | Publication Date |
|---|---|
| CN220665121U true CN220665121U (en) | 2024-03-26 |
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| CN202322350052.9U Active CN220665121U (en) | 2023-08-30 | 2023-08-30 | Waste water treatment equipment |
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| Country | Link |
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| CN (1) | CN220665121U (en) |
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