CN211056823U - Salting device of high-salinity wastewater - Google Patents
Salting device of high-salinity wastewater Download PDFInfo
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- CN211056823U CN211056823U CN201921737754.XU CN201921737754U CN211056823U CN 211056823 U CN211056823 U CN 211056823U CN 201921737754 U CN201921737754 U CN 201921737754U CN 211056823 U CN211056823 U CN 211056823U
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Abstract
The utility model discloses a salting device of high salt waste water. The salt separating device comprises a reaction kettle, a mixing area and a separation area below the mixing area are arranged in the reaction kettle, the reaction kettle is provided with a water inlet capable of introducing high-salt wastewater and a liquid inlet capable of introducing an organic solvent, the high-salt wastewater and the organic solvent are mixed in the mixing area to form a solid-liquid mixture, the reaction kettle is provided with a salt discharge port below the separation area, the salt discharge port can discharge solid-phase inorganic salt separated from the solid-liquid mixture out of the reaction kettle, and a water outlet is further formed in the upper part of the reaction kettle. The utility model discloses not only can separate the inorganic salt electrolyte in the waste water effectively, the solid phase inorganic salt of separation is the gravel form, and is fluffy not harden to can not cause the dirty stifled of salt discharge mouth, equipment retrencies and convenient operation moreover, the energy consumption is low, the running cost is little.
Description
Technical Field
The utility model belongs to the technical field of waste water treatment, a salting device of high salt waste water is related to.
Background
The problem of water pollution is an environmental problem all over the world, and in order to improve the quality of water environment, water environment protection measures adopted by the country are increasingly strengthened, and zero emission is one of the most important problems in wastewater treatment, and the term "zero emission" can be generally understood to mean that pollutant and resource emission is reduced to zero to an unlimited extent. For high-salinity wastewater generated in the industrial fields of chemical industry, printing and dyeing, medicine and the like, effectively recycling a large amount of electrolyte resources in the wastewater to obtain an inorganic salt product is an important work for realizing zero emission.
At present, in the treatment of high-salinity wastewater, common salt precipitation technologies include a membrane technology and a multi-effect evaporation technology, wherein: although the membrane technology can effectively separate the inorganic salt electrolyte in the wastewater, the membrane technology has the defects of high energy consumption, easy pollution and blockage, high operation cost and the like; the multiple-effect evaporation technology has the defects of high energy consumption, easy pollution and blockage and high operation cost, and for the wastewater containing various inorganic salt electrolytes with low solubility, the multiple-effect evaporation technology is difficult to effectively separate the various inorganic salt electrolytes, so that a high-purity inorganic salt product cannot be obtained.
Disclosure of Invention
An object of the utility model is to provide a salt precipitation device of high salt waste water to solve the energy consumption of current salt precipitation technique high, easily dirty stifled, the big scheduling problem's of running cost at least one of them.
In order to achieve the above object, an embodiment of the present invention provides a salt separating device for high-salinity wastewater, the salt separating device includes a reaction kettle, a mixing region and a separation region located below the mixing region are arranged in the reaction kettle, the reaction kettle is in the mixing region is provided with a water inlet capable of introducing high-salinity wastewater and a liquid inlet capable of introducing organic solvent, the high-salinity wastewater and the organic solvent are in the mixing region is mixed and forms solid-liquid mixture, the reaction kettle is provided with a salt discharge port below the separation region, the salt discharge port can discharge solid-phase inorganic salt separated from the solid-liquid mixture outside the reaction kettle, and a water outlet is further arranged on the upper portion of the reaction kettle.
As a further improvement of an embodiment of the present invention, the salting device further comprises an agitating structure disposed in the mixing zone.
As a further improvement of an embodiment of the present invention, the water inlet is opened at the top of the mixing zone and the liquid inlet is opened at the bottom of the mixing zone.
As a further improvement of one embodiment of the invention, the top end of the stirring structure is higher than the water inlet, and the bottom end of the stirring structure is lower than the liquid inlet.
As a further improvement of an embodiment of the present invention, the inner wall of the reaction vessel is provided in a funnel shape in the separation zone.
As a further improvement of an embodiment of the present invention, the salting out device comprises a suction filtration structure or a centrifugation structure provided at the separation zone.
As a further improvement of one embodiment of the present invention, a settling zone is further disposed in the reaction kettle above the mixing zone, and the salt precipitation device further comprises a three-phase separator disposed in the settling zone.
As a further improvement of an embodiment of the present invention, the drain port is located above the three-phase separator.
As a further improvement of an embodiment of the present invention, the organic solvent is one organic substance, or the organic solvent is a mixture of two or more organic substances; the organic matter is alcohol organic matter or amine organic matter.
As a further improvement of an embodiment of the present invention, the salt separating device includes a recovery structure capable of realizing extraction or distillation, an input port of the recovery structure is connected to the water outlet, and an output port of the recovery structure is connected to the liquid inlet.
Compared with the prior art, the beneficial effects of the utility model reside in that: the mixed region mixes high salt waste water and organic solvent, adopts organic solvent crystallization separation technique to separate out the salt to high salt waste water, and arrange from top to bottom through setting up the mixed region with the disengagement zone, separate out salt step and separation step can be accomplished in same reation kettle, not only can separate out the inorganic salt electrolyte in the waste water effectively, and the solid phase inorganic salt of separation is the gravel form, and is fluffy not harden to can not cause row salt mouth dirt stifled, equipment retrencies and convenient operation moreover, the energy consumption is low, the running cost is little.
Drawings
FIG. 1 is a schematic structural view of a salt deposition apparatus for high-salinity wastewater according to an embodiment of the present invention;
FIG. 2 is a flow chart of a method for salting out high-salinity wastewater according to an embodiment of the present invention.
Detailed Description
The present invention will be described in detail below with reference to specific embodiments shown in the drawings. However, these embodiments are not intended to limit the present invention, and structural, methodical, or functional changes that may be made by one of ordinary skill in the art based on these embodiments are all included in the scope of the present invention.
As shown in fig. 1, an embodiment of the present invention provides a salt deposition apparatus 100, and the salt deposition apparatus 100 is applied to a salt deposition process of high-salinity wastewater, also referred to as a salt deposition apparatus 100 of high-salinity wastewater.
The salting out device 100 comprises a reaction kettle 1 which is vertically arranged, and a mixing area 12 and a separation area 13 are arranged in the reaction kettle 1.
Wherein, reation kettle 1 is seted up in mixing zone 12 can introduce the water inlet 2 of high salt waste water (also treating waste water promptly) and can introduce organic solvent's inlet 3, that is to say, high salt waste water can directly get into in mixing zone 12 after passing reation kettle 1's lateral wall through water inlet 2 to and, organic solvent can directly get into in mixing zone 12 after passing reation kettle 1's lateral wall through inlet 3. Thus, the high-salinity wastewater and the organic solvent are mixed in the mixing zone 12, so that inorganic salts insoluble in the organic solvent are precipitated from the wastewater to form a solid-liquid mixture, thereby completing the salt precipitation step in the salt precipitation treatment process of the high-salinity wastewater.
Located below mixing zone 12 is separation zone 13, which can be used to separate solid phase inorganic salts from the solid-liquid mixture in mixing zone 12. The reaction kettle 1 is provided with a salt discharge port 4 below the separation region 13, the salt discharge port 4 can discharge the solid-phase inorganic salt out of the reaction kettle 1, that is, the solid-phase inorganic salt is discharged through the salt discharge port 4 below the separation region 13, in the embodiment, the solid-phase inorganic salt discharged from the salt discharge port 4 is in a wet salt state, and after being discharged out of the reaction kettle 1, moisture and/or organic solvent on the wet salt can be removed through technical means such as drying. A water outlet 5 is further formed in the upper portion of the reaction kettle 1, so that liquid-phase low-salt wastewater (i.e. the mixture of the wastewater after the inorganic salt is precipitated and the organic solvent) in the solid-liquid mixture in the mixing zone 12 is discharged out of the reaction kettle 1 through the water outlet 5.
Thus, the salt precipitation device 100 of the embodiment mixes the high-salinity wastewater with the organic solvent in the mixing zone 12, adopts the organic solvent crystallization separation technology to carry out salt precipitation treatment on the high-salinity wastewater, and through arranging the mixing zone 12 and the separation zone 13 which are arranged up and down, the salt precipitation step and the separation step can be completed in the same reaction kettle 1, so that the inorganic salt electrolyte in the wastewater can be effectively separated, the separated solid-phase inorganic salt is gravel-shaped and fluffy and not hardened, and therefore, the pollution and blockage of the salt discharge port 4 can not be caused, and the equipment is simple and convenient to operate, low in energy consumption and low in operation cost.
The organic solvent can be one organic matter or a mixture of two or more organic matters according to production requirements.
For example, the organic solvent is an organic substance, that is, the organic solvent has a single component, and when only a single inorganic salt is contained in the high-salinity wastewater, or when at least two inorganic salts are contained in the high-salinity wastewater, the specific inorganic salt insoluble in the organic substance in the high-salinity wastewater can be precipitated and separated by the separation zone 13 and discharged out of the reaction kettle 1, so as to obtain a high-purity solid-phase inorganic salt product. Taking a specific use example for illustration, for example, when the high-salinity wastewater contains inorganic salts a and inorganic salts B, two salt precipitating devices 100 may be provided, the water outlet 5 of the previous salt precipitating device 100 is communicated with the water inlet 2 of the next salt precipitating device 100, and the organic solvent introduced at the liquid inlet 3 of the previous salt precipitating device 100 is the first organic substance a, so that the inorganic salts a are precipitated in the previous salt precipitating device 100; the low-salt wastewater (containing wastewater and the first organic matter a) discharged from the water outlet 5 of the previous salting-out device 100 is continuously introduced into the reaction kettle 1 of the subsequent salting-out device 100 as high-salt wastewater, and the organic solvent introduced from the liquid inlet 3 of the subsequent salting-out device 100 is the second organic matter B, so that the inorganic salt B is separated out in the subsequent salting-out device 100, and the inorganic salt A and the inorganic salt B in the high-salt wastewater can be effectively separated.
For another example, when only a single inorganic salt is contained in the high-salinity wastewater, or when at least two inorganic salts are contained in the high-salinity wastewater without separating different inorganic salts, the organic solvent is a mixture of two or more organic substances, so that all/most of the inorganic salts in the high-salinity wastewater are separated out together and discharged out of the reaction kettle 1 through the separation zone 13.
The organic substance may be an alcohol organic substance such as methanol or ethanol, or an amine organic substance.
Further, the salt deposition apparatus 100 further includes an agitation structure 6 disposed in the mixing zone 12, so that the high-salt wastewater introduced from the water inlet 2 and the organic solvent introduced from the liquid inlet 3 can be sufficiently mixed in the mixing zone 12, so that inorganic salts insoluble in the organic solvent in the high-salt wastewater can be sufficiently precipitated. In this embodiment, the stirring structure 6 can be fixed on the wall of the reaction vessel 1 by means of a support and the effective stirring range of the stirring device 6 extends over the entire mixing zone 12.
Preferably, in this embodiment, the water inlet 2 is opened at the top of the mixing zone 12, that is, the wastewater enters directly into the top of the mixing zone 12 through the water inlet 2, of course, a control valve and/or a power pump may be provided to control whether the water inlet 2 introduces the high-salinity wastewater; the liquid inlet 3 is arranged at the bottom of the mixing zone 12, that is, the organic solvent directly enters the bottom of the mixing zone 12 through the liquid inlet 3, and of course, a control valve and/or a power pump can be arranged to control whether the liquid inlet 3 introduces the organic solvent. Therefore, the high-salt wastewater has a sinking trend relative to the organic solvent due to different densities, and conversely, the organic solvent has a rising trend relative to the high-salt wastewater, and the high-salt wastewater and the organic solvent are favorably contacted and mixed repeatedly by arranging the water inlet 2 and the liquid inlet 3.
Wherein, the top end of the stirring structure 6 is higher than the water inlet 2, that is, the effective stirring range of the stirring structure 6 is higher than the water inlet 2; simultaneously, the bottom end of stirring structure 6 is less than inlet 3 downwards, i.e. the effective stirring scope of stirring structure 6 is less than inlet 3 downwards to make mixing zone 12 between water inlet 2 and inlet 3 covered by the effective stirring scope of stirring structure 6.
Further, in the present embodiment, the salt deposition apparatus 100 implements filtration separation of the solid-liquid mixture in the separation area 13, that is, the inner wall of the reaction kettle 1 is provided with a funnel structure at the separation area 13, and the salt discharge port 4 is an opening formed at the lower tip of the funnel structure, so that after the solid-liquid mixture formed in the mixing area 12 enters the separation area 13 and loses the agitation of the stirring structure 6, the solid-phase inorganic salt therein is deposited below the separation area 13 under the action of its own gravity, and then is discharged out of the reaction kettle 1 through the salt discharge port 4, thereby completing the filtration separation. Of course, without being limited thereto, for example, in other embodiments, the salting device 100 may further include a suction filtration structure disposed at the separation zone 13 to achieve suction filtration separation of the solid-liquid mixture, or a centrifugal structure disposed at the separation zone 13 to achieve centrifugal separation of the solid-liquid mixture, or the like.
Further, a settling zone 11 located above the mixing zone 12 is also arranged in the reaction kettle 1, and the water outlet 5 is located at the top of the settling zone 11; the salting device 100 further comprises a three-phase separator 7 arranged in the settling zone 11, the water outlet 5 being located above the three-phase separator 7. During use, when the solid-liquid mixture wrapped with the solid-phase inorganic substances in the particulate form flows upwards to the settling area 11, the solid-phase inorganic substances fall back to the mixing area 12 under the separation action of the three-phase separator 7, and the liquid phase continuously flows upwards to the top of the settling area 11 and is discharged out of the reaction kettle 1 through the water outlet 5. The three-phase separator 7 can ensure that the low-salt wastewater discharged from the water outlet 5 does not contain solid inorganic matters.
It is understood that in the present embodiment, the settling zone 11, the mixing zone 12 and the separation zone 13 are roughly divided according to the treatment effect realized in the spaces with different height ranges in the reaction kettle 1, for example, the mixing zone 12 is roughly the height range covered by the stirring structure 6, and the separation zone 13 is roughly the height range of the funnel structure; in fact, the settling zone 11, the mixing zone 12 and the separation zone 13 are connected with each other as a whole, and there is no obvious separation boundary or barrier structure between two adjacent settling zones (i.e. between the settling zone 11 and the mixing zone 12, and between the mixing zone 12 and the separation zone 13).
In addition, the salt deposition device 100 may further include a recycling structure, an input port of the recycling structure is connected to the water outlet 5 for receiving the low-salt wastewater from the water outlet 5, the recycling structure is capable of recycling the organic solvent from the low-salt wastewater by extraction, distillation, or the like, and an output port of the recycling structure is connected to the liquid inlet 3 for delivering the recycled organic solvent to the liquid inlet 3, so as to achieve recycling of the organic solvent.
Further, referring to fig. 2, an embodiment of the present invention further provides a salt deposition method that can be implemented by using the salt deposition apparatus shown in fig. 1, wherein the salt deposition method includes a salt deposition step and a separation step. Wherein, the salt separating step is as follows: mixing the high-salt wastewater with an organic solvent to separate out inorganic salt which is insoluble in the organic solvent from the high-salt wastewater to form a solid-liquid mixture; the separation steps are as follows: and carrying out solid-liquid separation on the solid-liquid mixture to obtain solid-phase inorganic salt and low-salt wastewater.
In this way, the method for salting out high-salt wastewater according to the embodiment mixes the high-salt wastewater with the organic solvent, and performs salting out treatment on the high-salt wastewater by using the organic solvent crystallization separation technology, so that the inorganic salt electrolyte in the high-salt wastewater can be effectively separated, and the separated solid-phase inorganic salt is gravel-shaped and fluffy and not hardened, thereby causing no pollution and blockage, and having low energy consumption and low operation cost.
Wherein the organic solvent is an organic matter, that is, the organic solvent has a single component, so that a specific inorganic salt which is insoluble in the organic matter in the high-salt wastewater can be precipitated by sequentially treating the high-salt wastewater for one cycle according to the salt precipitation step and the separation step, thereby obtaining a high-purity solid-phase inorganic salt product.
If the organic solvent is an organic matter, the high-salinity wastewater can be sequentially treated for a plurality of cycles according to the salting-out step and the separation step, and the organic solvents in any two cycles of the salting-out step are different, so that a high-purity solid-phase inorganic salt product can be obtained after each cycle is finished for the high-salinity wastewater with a plurality of inorganic salts, and the plurality of inorganic salts in the high-salinity wastewater can be effectively separated. For example, when the high-salinity wastewater contains inorganic salts a and inorganic salts B, the high-salinity wastewater may be treated in a first cycle according to the salt precipitation step and the separation step in sequence, and the first organic substance a is added in the salt precipitation step of the first cycle to obtain solid-phase inorganic salts a insoluble in the first organic substance a and low-salinity wastewater containing the first organic substance a; and then, sequentially treating the low-salt wastewater for a second cycle according to the salt separating step and the separating step, and adding a second organic substance B in the salt separating step of the second cycle to separate out inorganic salt B which is insoluble in the second organic substance B.
Of course, the present invention is not limited to the embodiment in which the organic solvent is one kind of organic matter, and for example, when only a single inorganic salt is contained in the high-salinity wastewater, or when at least two kinds of inorganic salts are contained in the high-salinity wastewater without separating different inorganic salts, the high-salinity wastewater may be treated in the sequence of the salt precipitation step and the separation step by only one cycle, and the organic solvent may be a mixture of two or more kinds of organic matters in the cycle, so that all/most of the inorganic salts in the high-salinity wastewater are precipitated together.
The organic substance may be an alcohol organic substance such as methanol or ethanol, or an amine organic substance.
Further, in the salting-out step, the wastewater and the organic solvent are uniformly mixed by stirring.
Further, in the separation step, solid-liquid separation is carried out on the solid-liquid mixture by adopting any one of the processes of filtering, suction filtration and centrifugation.
In addition, the salting-out method further comprises a recovering step, wherein the recovering step comprises: and recycling the organic solvent from the low-salt wastewater obtained in the separation step. It is understood that the low-salt wastewater obtained in the separation step includes wastewater and organic solvent, and the organic solvent can be recovered from the low-salt wastewater obtained in the separation step by distillation, extraction and other processes, and can be reused in the salt precipitation step.
The salt precipitation method of the present invention is described below by way of specific experimental examples.
Example 1
In this embodiment, for the production wastewater of a certain petrochemical enterprise, the salt content of the wastewater before treatment is 30% to 60%, the wastewater is treated by the salt precipitation method: mixing the wastewater and the alcohol organic matter while stirring to obtain a solid-liquid mixture; and carrying out centrifugal separation on the solid-liquid mixture to obtain solid-phase inorganic salt and effluent.
Through detecting, the salt content of the play water is less than 1%, can see out from this, adopts the utility model discloses a salt precipitation method can make the inorganic salt in the waste water effectively separate out, and the energy consumption is low, the non-staining is stifled, the running cost is little.
Example 2
In this embodiment, for the production wastewater of a certain pesticide enterprise, the salt content of the wastewater before treatment is 20% to 40%, the wastewater is treated by the salt precipitation method: mixing the wastewater and the alcohol organic matter while stirring to obtain a solid-liquid mixture; and carrying out centrifugal separation on the solid-liquid mixture to obtain solid-phase inorganic salt and effluent.
Through detecting, the salt content of the play water is less than 1%, can see out from this, adopts the utility model discloses a salt precipitation method can make the inorganic salt in the waste water effectively separate out, and the energy consumption is low, the non-staining is stifled, the running cost is little.
It should be understood that although the present description refers to embodiments, not every embodiment contains only a single technical solution, and such description is for clarity only, and those skilled in the art should make the description as a whole, and the technical solutions in the embodiments can also be combined appropriately to form other embodiments understood by those skilled in the art.
The above list of details is only for the practical implementation of the present invention, and they are not intended to limit the scope of the present invention, and all equivalent implementations or modifications that do not depart from the technical spirit of the present invention should be included in the scope of the present invention.
Claims (9)
1. The salt separating device for the high-salinity wastewater is characterized by comprising a reaction kettle, wherein a mixing area and a separation area positioned below the mixing area are arranged in the reaction kettle, the reaction kettle is provided with a water inlet capable of introducing the high-salinity wastewater and a liquid inlet capable of introducing an organic solvent in the mixing area, the high-salinity wastewater and the organic solvent are mixed in the mixing area to form a solid-liquid mixture, the reaction kettle is provided with a salt discharge port below the separation area, the salt discharge port can discharge solid-phase inorganic salt separated from the solid-liquid mixture out of the reaction kettle, and a water outlet is further formed in the upper portion of the reaction kettle.
2. The apparatus for salting out of high salinity wastewater according to claim 1, wherein the salting out apparatus further comprises an agitation structure disposed within the mixing zone.
3. The apparatus for salting out of high salinity wastewater according to claim 2, wherein the water inlet is open at the top of the mixing zone and the liquid inlet is open at the bottom of the mixing zone.
4. The apparatus for salting out of high salinity wastewater according to claim 3, wherein the top end of the stirring structure is higher than the water inlet and the bottom end is lower than the liquid inlet.
5. The salting apparatus for high-salinity wastewater according to claim 1, wherein the inner wall of the reaction kettle is arranged in a funnel shape in the separation zone.
6. The apparatus for salting out of high salinity wastewater according to claim 1, wherein, the salting out apparatus comprises a suction filtration structure or a centrifugation structure provided at the separation zone.
7. The apparatus for salting out of high salinity wastewater according to claim 1, wherein a settling zone is further arranged in the reaction vessel above the mixing zone, the apparatus further comprising a three-phase separator arranged in the settling zone.
8. The apparatus for salting out of high salinity wastewater according to claim 7, wherein the drain is located above the three-phase separator.
9. The salting device for high-salinity wastewater according to claim 1, wherein the salting device comprises a recovery structure capable of realizing extraction or distillation, an input port of the recovery structure is connected with the water outlet, and an output port of the recovery structure is connected with the liquid inlet.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2018221276814 | 2018-12-18 | ||
| CN201822127681 | 2018-12-18 |
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| CN211056823U true CN211056823U (en) | 2020-07-21 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110590002A (en) * | 2018-12-18 | 2019-12-20 | 苏州清然环保科技有限公司 | Salting device and salting method for high-salinity wastewater |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110590002A (en) * | 2018-12-18 | 2019-12-20 | 苏州清然环保科技有限公司 | Salting device and salting method for high-salinity wastewater |
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