CN112962110B - Method for refining by-product salt after incineration - Google Patents
Method for refining by-product salt after incineration Download PDFInfo
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- CN112962110B CN112962110B CN202110134435.5A CN202110134435A CN112962110B CN 112962110 B CN112962110 B CN 112962110B CN 202110134435 A CN202110134435 A CN 202110134435A CN 112962110 B CN112962110 B CN 112962110B
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- 150000003839 salts Chemical class 0.000 title claims abstract description 27
- 239000006227 byproduct Substances 0.000 title claims abstract description 14
- 238000000034 method Methods 0.000 title claims abstract description 11
- 238000007670 refining Methods 0.000 title claims abstract description 7
- 238000005868 electrolysis reaction Methods 0.000 claims abstract description 36
- 239000012528 membrane Substances 0.000 claims abstract description 32
- -1 Hypochlorite ions Chemical class 0.000 claims abstract description 22
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims abstract description 20
- QWPPOHNGKGFGJK-UHFFFAOYSA-N hypochlorous acid Chemical compound ClO QWPPOHNGKGFGJK-UHFFFAOYSA-N 0.000 claims abstract description 16
- 239000000243 solution Substances 0.000 claims abstract description 14
- WQYVRQLZKVEZGA-UHFFFAOYSA-N hypochlorite Inorganic materials Cl[O-] WQYVRQLZKVEZGA-UHFFFAOYSA-N 0.000 claims abstract description 11
- 239000007864 aqueous solution Substances 0.000 claims abstract description 6
- 239000003014 ion exchange membrane Substances 0.000 claims abstract description 6
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 claims description 22
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 21
- 239000001257 hydrogen Substances 0.000 claims description 14
- 229910052739 hydrogen Inorganic materials 0.000 claims description 14
- 239000000126 substance Substances 0.000 claims description 9
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 claims description 8
- 239000000047 product Substances 0.000 claims description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 8
- 239000005708 Sodium hypochlorite Substances 0.000 claims description 7
- SUKJFIGYRHOWBL-UHFFFAOYSA-N sodium hypochlorite Chemical compound [Na+].Cl[O-] SUKJFIGYRHOWBL-UHFFFAOYSA-N 0.000 claims description 7
- 229910001415 sodium ion Inorganic materials 0.000 claims description 5
- 238000000576 coating method Methods 0.000 claims description 3
- 239000011248 coating agent Substances 0.000 claims description 2
- 230000033116 oxidation-reduction process Effects 0.000 claims description 2
- 239000002994 raw material Substances 0.000 claims description 2
- 239000012466 permeate Substances 0.000 claims 2
- 238000007599 discharging Methods 0.000 claims 1
- 230000002209 hydrophobic effect Effects 0.000 claims 1
- 239000000463 material Substances 0.000 claims 1
- 230000003472 neutralizing effect Effects 0.000 claims 1
- 238000007254 oxidation reaction Methods 0.000 abstract description 12
- 239000005416 organic matter Substances 0.000 abstract description 8
- 230000035484 reaction time Effects 0.000 abstract description 3
- 235000002639 sodium chloride Nutrition 0.000 description 32
- 239000010410 layer Substances 0.000 description 11
- 239000011780 sodium chloride Substances 0.000 description 11
- 230000003647 oxidation Effects 0.000 description 7
- 238000006243 chemical reaction Methods 0.000 description 6
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 4
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 4
- WCUXLLCKKVVCTQ-UHFFFAOYSA-M Potassium chloride Chemical compound [Cl-].[K+] WCUXLLCKKVVCTQ-UHFFFAOYSA-M 0.000 description 4
- 239000000460 chlorine Substances 0.000 description 4
- 239000003792 electrolyte Substances 0.000 description 4
- 238000000746 purification Methods 0.000 description 4
- 239000002356 single layer Substances 0.000 description 4
- KZBUYRJDOAKODT-UHFFFAOYSA-N Chlorine Chemical group ClCl KZBUYRJDOAKODT-UHFFFAOYSA-N 0.000 description 3
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 description 2
- 239000006096 absorbing agent Substances 0.000 description 2
- 229910052801 chlorine Inorganic materials 0.000 description 2
- 229910001902 chlorine oxide Inorganic materials 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 150000002500 ions Chemical class 0.000 description 2
- 238000006386 neutralization reaction Methods 0.000 description 2
- 239000001103 potassium chloride Substances 0.000 description 2
- 235000011164 potassium chloride Nutrition 0.000 description 2
- 239000012266 salt solution Substances 0.000 description 2
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 1
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 description 1
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 238000006056 electrooxidation reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- XLYOFNOQVPJJNP-ZSJDYOACSA-N heavy water Substances [2H]O[2H] XLYOFNOQVPJJNP-ZSJDYOACSA-N 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 230000005012 migration Effects 0.000 description 1
- 238000013508 migration Methods 0.000 description 1
- 239000007800 oxidant agent Substances 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- OTYBMLCTZGSZBG-UHFFFAOYSA-L potassium sulfate Chemical compound [K+].[K+].[O-]S([O-])(=O)=O OTYBMLCTZGSZBG-UHFFFAOYSA-L 0.000 description 1
- 229910052939 potassium sulfate Inorganic materials 0.000 description 1
- 235000011151 potassium sulphates Nutrition 0.000 description 1
- 238000006722 reduction reaction Methods 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- FQENQNTWSFEDLI-UHFFFAOYSA-J sodium diphosphate Chemical compound [Na+].[Na+].[Na+].[Na+].[O-]P([O-])(=O)OP([O-])([O-])=O FQENQNTWSFEDLI-UHFFFAOYSA-J 0.000 description 1
- 229940048086 sodium pyrophosphate Drugs 0.000 description 1
- 229910052938 sodium sulfate Inorganic materials 0.000 description 1
- 235000011152 sodium sulphate Nutrition 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 235000019818 tetrasodium diphosphate Nutrition 0.000 description 1
- 239000001577 tetrasodium phosphonato phosphate Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Images
Classifications
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
- C25B1/00—Electrolytic production of inorganic compounds or non-metals
- C25B1/01—Products
- C25B1/34—Simultaneous production of alkali metal hydroxides and chlorine, oxyacids or salts of chlorine, e.g. by chlor-alkali electrolysis
- C25B1/46—Simultaneous production of alkali metal hydroxides and chlorine, oxyacids or salts of chlorine, e.g. by chlor-alkali electrolysis in diaphragm cells
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
- C25B13/00—Diaphragms; Spacing elements
- C25B13/02—Diaphragms; Spacing elements characterised by shape or form
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Water Treatment By Electricity Or Magnetism (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
- Electrolytic Production Of Non-Metals, Compounds, Apparatuses Therefor (AREA)
Abstract
The invention discloses a method for refining a byproduct salt after incineration, wherein an ion exchange membrane with double-layer semipermeable membranes is arranged in the middle of a salt aqueous solution electrolysis device to divide an aqueous solution in an electrolysis bath into two parts of spaces, and a positive electrode and a negative electrode are respectively arranged in the two spaces of the electrolysis bath. A hypochlorous acid or hydrochloric acid containing space is provided between the two layers of the double-layer semipermeable membrane, and the space is communicated with an inlet pipeline of hypochlorous acid or hydrochloric acid solution. Hypochlorite ions contact with the organic matter on the outer surface of the semi-permeable membrane to perform an oxidation reaction, so that the organic matter is oxidized or reduced and degraded. The invention can perform oxidation reaction while electrolyzing, and save reaction time and additional investment of treatment equipment.
Description
Technical Field
The invention relates to a salt refining and electrolysis technology.
Background
In the production of many organic substances, there are by-produced salts (sodium chloride, sodium sulfate, potassium chloride, potassium sulfate, sodium pyrophosphate, etc.) which contain many organic substances and require a refining step after removing a part of the organic substances by incineration to obtain refined salts. In the chlor-alkali industry, chlorine and sodium hydroxide are generally obtained by melting refined salt (sodium chloride) by electrolysis or by producing hydrogen, chlorine and sodium hydroxide by electrolysis of a saturated aqueous sodium chloride solution.
Electrolytic sodium chloride (solution) reaction equation: 2NaCl +2H2O ═ 2NaOH +2H2 ═ 2Cl2 ═ ℃ ═ 2.
And (3) cathode reaction: 2Cl- (chloride) -2e ═ Cl2 ═ c; and (3) anode reaction: 2H + +2e ═ H2 ≠ H.
However, simple incineration of byproduct salt is difficult to completely remove organic matters in the salt, and direct electrolysis of byproduct salt causes an electrolytic electrode or an ion membrane to be polluted by organic matters, so that the electrolysis is difficult to smoothly proceed, so that it is usually necessary to perform chemical oxidation by using an oxidant such as hydrogen peroxide, sodium hypochlorite, ozone, etc. before salt purification or before electrolysis of an aqueous solution of salt, to remove organic matters which are not completely removed by incineration, and then to obtain a basic product of chemical industry such as chlorine gas, hydrogen gas, etc. by performing conventional treatment such as concentration, crystallization, filtration, drying, etc. on purified salt or by electrolyzing an aqueous solution of purified salt. Such oxidation and subsequent processing adds reaction steps, and additional costs such as processing equipment investment and reaction time.
The invention of application number 2015100776820 relates to a chemical industry waste salt refining plant, which is characterized in that: the device comprises an absorber, an evaporative crystallizer, a centrifugal machine, a rotary kiln, a dissolver, a filter, an incinerator, a cooling tower and a discharge tower, wherein the absorber is connected with the centrifugal machine through a first evaporative crystallizer, the discharge of the centrifugal machine is connected with the rotary kiln, the discharge of the rotary kiln is connected with a dissolving tank, the dissolving tank is connected with a second evaporative crystallizer through the filter, the second evaporative crystallizer is connected with the centrifugal machine, the air outlet of the rotary kiln is connected with the incinerator, and the incinerator is connected with the discharge tower through the cooling tower. The invention has more equipment investment and incomplete removal of organic impurities.
The invention of application number 2017105910401 discloses a sewage treatment device by an electrochemical oxidation method, which comprises a power supply device, at least two electrolytic cells and a purification tank; wherein: the electrolytic cells comprise a flow type electrolytic cell and a fixed type electrolytic cell which are alternately arranged; an anode plate and a cathode plate are respectively arranged on the two side walls in the electrolytic cell, and a particle electrode is filled in the electrolytic cell; the anode of the power supply device is connected with the anode plate in the electrolytic cell through a wire, and the cathode of the power supply device is connected with the cathode plate in the electrolytic cell through a wire; the electrolytic cells and the purifying cells are communicated through overflow walls. This invention relates to electrolysis, but fails to provide how to apply electrolysis to the purification of crude salt.
Disclosure of Invention
The purpose of the invention is as follows:
a method for purifying a by-product salt after incineration, which can improve the quality of the by-product salt, facilitate smooth electrolysis of a salt solution, and simultaneously carry out oxidation and electrolysis.
The technical scheme is as follows:
the method for purifying the incinerated byproduct salt is characterized in that an oxidation treatment part and an oxidation synchronous treatment process are added in an electrolysis device when the aqueous salt solution is electrolyzed.
The common electrolyzing device for water solution of sodium chloride or potassium chloride has cathode and anode, and the electrolyzed product is sodium hydroxide or potassium hydroxide solution obtained in liquid phase and hydrogen and chlorine gas obtained separately in the two ends of the cathode and anode.
The electrolysis apparatus of the present invention is provided with an ion exchange membrane which is a semipermeable membrane that is permeable to water molecules, hydrogen ions, hydroxide ions, chloride ions, sodium ions, and hypochlorite ions and impermeable to organic substances.
During electrolysis, the electrolyte is a byproduct salt (or refined salt) water solution, the semipermeable membrane is arranged in the middle of the electrolyte to divide the water solution in the electrolyte into two parts of spaces, and the anode and the cathode are respectively arranged in the two spaces of the electrolyte.
Preferably, the semipermeable membrane of the present invention is a double-layer semipermeable membrane. A hypochlorous acid or hydrochloric acid containing space is provided between the two layers of the double-layer semipermeable membrane, the space is communicated with an inlet pipeline of hypochlorous acid or hydrochloric acid solution, and an outlet is provided below the space (to obtain organic matter-removed byproduct salt).
During electrolysis, after the anode and the cathode are electrified, part of chloride ions pass through the double-layer semipermeable membrane to move to the anode, and hypochlorite ions pass through the single-layer semipermeable membrane to move to the anode; part of hydrogen ions and sodium ions move to the cathode through the double-layer semipermeable membrane, and part of hydrogen ions ionized by hypochlorous acid move to the cathode through the single-layer semipermeable membrane. Hypochlorite ions are in contact with the organic matter on the outer surface of the semipermeable membrane (preferably, both outer surfaces of the semipermeable membrane are oily, have affinity with the organic matter, and have hydrophobicity) to undergo an oxidation reaction, and some hydrogen ions are in contact with the organic matter on the outer surface of the semipermeable membrane to undergo a reduction reaction. So that the organic matter is adsorbed, oxidized or reduced and degraded by the envelope, and the adsorption and migration of the organic matter to the surfaces of the cathode and the anode are reduced, and the surfaces of the cathode and the anode can be provided with hydrophilic conductive coatings which have affinity or compatibility with hydrogen ions and chloride ions, are convenient for electrolysis and are not easy to adsorb the organic matter.
If excessive hypochlorous acid is introduced, in addition to oxidation reduction of organic matters, the rest hypochlorous acid reacts with the electrolysis product sodium hydroxide for neutralization reaction to generate sodium hypochlorite, and then the sodium hypochlorite is discharged for treatment, so that the alkalinity of the solution is reduced, and the corrosion to equipment is reduced.
If hydrochloric acid is introduced, the sodium chloride is subjected to neutralization reaction with the electrolysis product sodium hydroxide to generate sodium chloride, and the sodium chloride is directly involved in the electrolysis reaction without being discharged, so that the alkaline corrosion is reduced, and the sodium chloride is used as an electrolysis raw material to improve the yield of the electrolysis product.
Has the advantages that:
the method ensures that the incinerated byproduct salt can be directly electrolyzed in the aqueous solution, reduces the separate oxidation degradation step, performs the oxidation reaction while electrolyzing, and saves the reaction time and the additional investment of treatment equipment.
The current or electric field in the electrolysis accelerates the moving speed of hypochlorite and hydrogen ions, and the semipermeable membrane helps to adsorb and adhere organic matters, so that the pollution to the electrode is avoided, and the electrolysis reaction is smooth.
Hypochlorous acid is adopted for oxidation, hypochlorite radicals participate in reaction to generate chloride ions and hydrogen ions, other complex ion components are prevented from entering the solution, and the yield of chlorine is increased. The difficulty of the post purification treatment of the reaction solution is reduced.
Drawings
FIG. 1 is a schematic cross-sectional view of an apparatus of the present invention;
in the figure, 1-cathode; 2-an anode; 3-a hydrogen outlet; 4-an electrolytic cell; 5-aqueous sodium chloride solution; a 6- (sodium hypochlorite) outlet; 7-a semi-permeable membrane; 8-a chlorine outlet; 9-sodium chloride supply port; 10-hypochlorous acid or hydrochloric acid inlet.
Detailed Description
As shown in figure 1, the water solution electrolysis device for incinerating byproduct salt is characterized in that an ion exchange membrane is arranged in the middle of the electrolysis device, the ion exchange membrane is a double-layer semipermeable membrane and divides the water solution in an electrolysis bath into two parts of spaces, and a positive electrode and a negative electrode are respectively arranged in the two spaces of the electrolysis bath.
A hypochlorous acid containing space is arranged between the two layers of the double-layer semipermeable membrane, the upper part of the space is communicated with an inlet pipeline of the hypochlorous acid, and the lower part of the space is communicated with a sodium hypochlorite outlet; the double-layer semipermeable membrane is permeable to water molecules, hydrogen ions, hydroxyl ions, chloride ions, sodium ions and hypochlorite ions, and impermeable to organic substances.
During electrolysis, after the anode and the cathode are electrified, part of chloride ions pass through the double-layer semipermeable membrane to move to the cathode, and hypochlorite ions pass through the single-layer semipermeable membrane to move to the cathode; part of hydrogen ions and sodium ions pass through the double-layer semipermeable membrane to move to the anode, and part of hydrogen ions ionized by hypochlorous acid pass through the single-layer semipermeable membrane to move to the anode. Hypochlorite ions contact with organic matters on the outer surface of the semipermeable membrane to carry out oxidation reaction, so that the organic matters are adsorbed by the coating and are oxidized and degraded.
Claims (3)
1. A method for refining a byproduct salt after incineration is characterized by comprising the following steps: an ion exchange membrane is arranged in the middle of a saline solution electrolysis device, the ion exchange membrane is a semipermeable membrane and divides the aqueous solution in an electrolysis bath into two parts of spaces, and a positive electrode and a negative electrode are respectively arranged in the two spaces of the electrolysis bath;
the semi-permeable membrane is a double-layer semi-permeable membrane, a hypochlorous acid or hydrochloric acid containing space is arranged between two layers of the double-layer semi-permeable membrane, and the space is communicated with an inlet pipeline of hypochlorous acid or hydrochloric acid solution; the double-layer semipermeable membrane can permeate water molecules, hydrogen ions, hydroxyl ions, chloride ions, sodium ions and hypochlorite ions and cannot permeate organic substances; an outlet is arranged below the containing space of the hypochlorous acid or the hydrochloric acid to obtain the byproduct salt with organic matters removed.
2. The method according to claim 1, wherein: the two outer surfaces of the semipermeable membrane are made of oily materials, and are compatible with organic matters and hydrophobic; or, the surface of the electrode is also provided with a hydrophilic conductive coating.
3. The method according to claim 1 or 2, wherein: introducing excessive hypochlorous acid, carrying out oxidation reduction on the organic matters, and neutralizing the rest hypochlorous acid with electrolytic product sodium hydroxide to generate sodium hypochlorite and then discharging the sodium hypochlorite from the outlet;
or, hydrochloric acid is introduced to neutralize and react with the electrolysis product sodium hydroxide and serve as an electrolysis raw material to improve the yield of the electrolysis product.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110134435.5A CN112962110B (en) | 2021-01-26 | 2021-01-26 | Method for refining by-product salt after incineration |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110134435.5A CN112962110B (en) | 2021-01-26 | 2021-01-26 | Method for refining by-product salt after incineration |
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| CN112962110A CN112962110A (en) | 2021-06-15 |
| CN112962110B true CN112962110B (en) | 2022-03-04 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2574094A1 (en) * | 1984-12-03 | 1986-06-06 | Chauffe Cie Gle | Electrolytic process for the production of an aqueous sodium hypochlorite solution. |
| JP2014129566A (en) * | 2012-12-28 | 2014-07-10 | Tosoh Corp | Electrolysis method for sodium chloride aqueous solution |
| CN111485247A (en) * | 2020-05-31 | 2020-08-04 | 湖南申联环保科技有限公司 | Resourceful treatment device and method for high-chlorine organic hazardous waste incineration fly ash |
| CN111826678A (en) * | 2020-07-27 | 2020-10-27 | 江苏安凯特科技股份有限公司 | A device and process system for resource utilization of by-product salt |
-
2021
- 2021-01-26 CN CN202110134435.5A patent/CN112962110B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2574094A1 (en) * | 1984-12-03 | 1986-06-06 | Chauffe Cie Gle | Electrolytic process for the production of an aqueous sodium hypochlorite solution. |
| JP2014129566A (en) * | 2012-12-28 | 2014-07-10 | Tosoh Corp | Electrolysis method for sodium chloride aqueous solution |
| CN111485247A (en) * | 2020-05-31 | 2020-08-04 | 湖南申联环保科技有限公司 | Resourceful treatment device and method for high-chlorine organic hazardous waste incineration fly ash |
| CN111826678A (en) * | 2020-07-27 | 2020-10-27 | 江苏安凯特科技股份有限公司 | A device and process system for resource utilization of by-product salt |
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