CN108128851B - Method for recycling sodium chloride solution in high-salt preserved szechuan pickle wastewater - Google Patents
Method for recycling sodium chloride solution in high-salt preserved szechuan pickle wastewater Download PDFInfo
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- CN108128851B CN108128851B CN201810078646.XA CN201810078646A CN108128851B CN 108128851 B CN108128851 B CN 108128851B CN 201810078646 A CN201810078646 A CN 201810078646A CN 108128851 B CN108128851 B CN 108128851B
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- sodium chloride
- water
- salt
- dialysis bag
- membrane dialysis
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- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 title claims abstract description 84
- 239000011780 sodium chloride Substances 0.000 title claims abstract description 38
- 239000002351 wastewater Substances 0.000 title claims abstract description 38
- 238000004064 recycling Methods 0.000 title claims abstract description 26
- 235000021110 pickles Nutrition 0.000 title claims abstract description 20
- 238000000034 method Methods 0.000 title claims abstract description 16
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 48
- 229910001868 water Inorganic materials 0.000 claims abstract description 40
- 239000012528 membrane Substances 0.000 claims abstract description 17
- 150000002500 ions Chemical class 0.000 claims abstract description 12
- 239000011148 porous material Substances 0.000 claims abstract description 9
- 239000008213 purified water Substances 0.000 claims abstract description 8
- 238000001914 filtration Methods 0.000 claims abstract 4
- 238000011034 membrane dialysis Methods 0.000 claims description 34
- 239000010410 layer Substances 0.000 claims description 14
- 239000012535 impurity Substances 0.000 claims description 5
- 239000011229 interlayer Substances 0.000 claims description 3
- 238000007789 sealing Methods 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 10
- 150000003839 salts Chemical class 0.000 abstract description 10
- 238000005516 engineering process Methods 0.000 abstract description 4
- 125000004122 cyclic group Chemical group 0.000 abstract 1
- 239000000243 solution Substances 0.000 description 16
- 239000012267 brine Substances 0.000 description 8
- HPALAKNZSZLMCH-UHFFFAOYSA-M sodium;chloride;hydrate Chemical compound O.[Na+].[Cl-] HPALAKNZSZLMCH-UHFFFAOYSA-M 0.000 description 8
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 6
- 241000219198 Brassica Species 0.000 description 5
- 235000003351 Brassica cretica Nutrition 0.000 description 5
- 235000003343 Brassica rupestris Nutrition 0.000 description 5
- QKSKPIVNLNLAAV-UHFFFAOYSA-N bis(2-chloroethyl) sulfide Chemical compound ClCCSCCCl QKSKPIVNLNLAAV-UHFFFAOYSA-N 0.000 description 5
- 235000010460 mustard Nutrition 0.000 description 5
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 3
- 239000001569 carbon dioxide Substances 0.000 description 3
- 229910002092 carbon dioxide Inorganic materials 0.000 description 3
- 239000007789 gas Substances 0.000 description 3
- JCXJVPUVTGWSNB-UHFFFAOYSA-N nitrogen dioxide Inorganic materials O=[N]=O JCXJVPUVTGWSNB-UHFFFAOYSA-N 0.000 description 3
- 238000005554 pickling Methods 0.000 description 3
- 241000894006 Bacteria Species 0.000 description 2
- 150000001413 amino acids Chemical class 0.000 description 2
- 238000004821 distillation Methods 0.000 description 2
- 238000000909 electrodialysis Methods 0.000 description 2
- 238000005342 ion exchange Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 102000004169 proteins and genes Human genes 0.000 description 2
- 108090000623 proteins and genes Proteins 0.000 description 2
- 238000001223 reverse osmosis Methods 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 238000004065 wastewater treatment Methods 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 238000009395 breeding Methods 0.000 description 1
- 230000001488 breeding effect Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000000502 dialysis Methods 0.000 description 1
- 238000010494 dissociation reaction Methods 0.000 description 1
- 230000005593 dissociations Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 239000010815 organic waste Substances 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- -1 salt ions Chemical class 0.000 description 1
- 229910001415 sodium ion Inorganic materials 0.000 description 1
- 159000000000 sodium salts Chemical class 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01D—COMPOUNDS OF ALKALI METALS, i.e. LITHIUM, SODIUM, POTASSIUM, RUBIDIUM, CAESIUM, OR FRANCIUM
- C01D3/00—Halides of sodium, potassium or alkali metals in general
- C01D3/04—Chlorides
- C01D3/06—Preparation by working up brines; seawater or spent lyes
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/32—Nature of the water, waste water, sewage or sludge to be treated from the food or foodstuff industry, e.g. brewery waste waters
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2301/00—General aspects of water treatment
- C02F2301/08—Multistage treatments, e.g. repetition of the same process step under different conditions
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Inorganic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
The invention belongs to the technical field of recycling of high-salt wastewater, and discloses a method for recycling sodium chloride solution in high-salt preserved szechuan pickle wastewater, which utilizes semi-permeable membranes with different pore diameters to pass through semi-permeable membrane technologies of molecules and ions with different molecular weights; and filtering the water layer by using semipermeable membranes with different apertures, and only filtering sodium chloride into purified water to partially recover the sodium chloride; and (3) flowing out molecules, ions, organic matters and sodium chloride which have molecular weight larger than that of sodium chloride and are not recovered from a wastewater outlet. The invention has simple structure, and can effectively recycle sodium chloride in the high-salt organic wastewater generated in the production process, thereby being capable of being continuously used for producing the preserved szechuan pickle or being used for other purposes and realizing the cyclic utilization of soluble salt resources.
Description
Technical Field
The invention belongs to the technical field of salt resource recycling in high-salt wastewater, and discloses a method for recycling sodium chloride solution in high-salt preserved szechuan pickle wastewater, in particular to a technical method for recycling sodium chloride salt in high-salt organic wastewater in the preparation process of preserved szechuan pickle, and a device for recycling sodium chloride salt resources by using the technical method.
Background
The preparation process of the hot pickled mustard tuber can produce a large amount of high-salt organic wastewater. At present, the traditional treatment methods of the high-salt organic wastewater comprise electrodialysis, distillation, reverse osmosis, ion exchange and the like, but the technical methods do not relate to the recycling of salt resources at all. The problems of the prior art are: the traditional high-salt wastewater treatment methods comprise electrodialysis, distillation, reverse osmosis, ion exchange and the like, the cost of the treatment methods is relatively high, but the treatment methods do not relate to the recycling of salt resources, the final products are low-pollutant-content salt-containing wastewater or purified water without pollutants, and the aim is that the high-salt organic wastewater after being treated meets the national discharge standard requirement, meets the discharge standards, and can not realize the aim of recycling sodium chloride salt resources.
In short, the conventional method cannot achieve the purpose of recycling sodium chloride salt resources, and does not involve the problem of recycling sodium chloride salt.
Disclosure of Invention
Aiming at the problems existing in the prior art, the invention provides a method for recycling sodium chloride solution in high-salt preserved szechuan pickle wastewater, which is innovative in that the recycling of salt resources is emphasized, and the recycling of salt resources is not involved in all wastewater treatment methods in the prior art.
A method for recovering sodium chloride solution from high-salt preserved szechuan pickle waste water utilizes a semi-permeable membrane technology, because semi-permeable membranes with different pore diameters can pass molecules and ions with different molecular weights. The larger the pore size, the larger the molecular weight that can be passed. Conversely, the smaller. The essence of the invention is that the semipermeable membranes with different apertures are utilized to filter layer by layer, and only sodium chloride is filtered into purified water, thereby realizing the purpose of partially recycling sodium chloride. In fact, even if sodium chloride is partially recovered, the total amount is very considerable, and those molecules and ions having a molecular weight greater than that of sodium chloride, including organic matters in the wastewater, will flow out of the wastewater outlet together with those not recovered.
Another object of the present invention is to provide a device for recovering sodium chloride solution in high-salt hot pickled mustard tuber wastewater, which is provided with: a water reservoir;
the semi-permeable membrane dialysis bag is divided into three layers, namely an inner semi-permeable membrane dialysis bag, a middle semi-permeable membrane dialysis bag and an outer semi-permeable membrane dialysis bag, and is placed in the water receiver; the aim is to realize that organic wastes with different molecular weights in the high-salt organic wastewater are filtered out in a layering way.
The water inlet is arranged at the head part of the inner semipermeable membrane dialysis bag, and the water outlet is arranged at the tail part of the semipermeable membrane dialysis bag.
Further, the innermost layer of the bag and the interlayer between the bags are all permeable to water without any impurity, the permeable molecular weight of the inner semipermeable membrane dialysis bag is 200, the permeable molecular weight of the middle semipermeable membrane dialysis bag is 100, and the permeable molecular weight of the outer semipermeable membrane dialysis bag is 50. Theoretical and practical demonstration: because the organic matters with the molecular weight lower than 50 do not exist in the high-salt organic wastewater at all, soluble organic matters with the molecular weight higher than 50, such as amino acid, protein, fat and the like, can be sequentially filtered out by the semipermeable membrane dialysis bags in a layered manner, and only chloride ions and sodium ions generated by dissociation of sodium chloride salt in water can pass through substances of the semipermeable membrane dialysis bags with the molecular weight of 50, so that the purpose of recycling the sodium chloride salt is realized.
Further, the joint of the water receiver cover plate and the water receiver is sealed by a sealing ring.
The invention has simple structure, and can effectively recycle sodium chloride in the high-salt organic wastewater generated in the production process of the preserved szechuan pickle, thereby being capable of being continuously used for producing the preserved szechuan pickle or being used for other purposes and realizing the recycling of sodium chloride salt resources.
The present invention utilizes semi-permeable membrane technology because semi-permeable membranes of different pore sizes can differentially permeate through molecules and ions of different molecular weight sizes. The larger the membrane pore size, the larger the molecular weight that can be passed. The smaller the membrane pore size, the smaller the molecular weight species will pass. The essence of the invention is that the semipermeable membranes with different apertures are utilized to filter layer by layer, and only sodium chloride is filtered into purified water, thereby realizing the purpose of partially recycling sodium chloride. In fact, even if sodium chloride is partially recovered, the total amount is very considerable, and those molecules and ions having a molecular weight greater than that of sodium chloride, including organic matters in the wastewater, will flow out of the wastewater outlet together with those not recovered.
Drawings
FIG. 1 is a schematic diagram of a device for recycling sodium chloride solution in high-salt hot pickled mustard tuber wastewater, which is provided by the embodiment of the invention;
in the figure: 1. a water reservoir; 2. an inner semipermeable membrane dialysis bag; 3. a middle semipermeable membrane dialysis bag; 4. an external semipermeable membrane dialysis bag; 5. a wastewater outlet; 6. nitrogen or carbon dioxide gas inlets; 7. an exhaust port; 8. an observation window; 9. a purified water inlet; 10. and a water outlet.
Detailed Description
For further understanding of the invention, the following examples are set forth to illustrate the invention, its features and their efficacy, as best illustrated in the accompanying drawings, 1.
The structure of the present invention will be described in detail with reference to the accompanying drawings.
The method for recycling the sodium chloride solution in the high-salt preserved szechuan pickle wastewater provided by the embodiment of the invention utilizes the semi-permeable membrane technology, because the semi-permeable membranes with different pore diameters can pass through molecules and ions with different molecular weights. The larger the pore size, the larger the molecular weight that can be passed. Conversely, the smaller. The essence of the invention is that the semipermeable membranes with different apertures are utilized to filter layer by layer, and only sodium chloride is filtered into purified water, thereby realizing the purpose of partially recycling sodium chloride. In fact, even if sodium chloride is partially recovered, the total amount is very considerable, and those molecules and ions having a molecular weight greater than that of sodium chloride, including organic matters in the wastewater, will flow out of the wastewater outlet together with those not recovered.
As shown in fig. 1, the device for recovering sodium chloride solution in high-salt preserved szechuan pickle waste water provided by the embodiment of the invention is provided with: a water reservoir 1; the semipermeable membrane dialysis bag is divided into three layers, namely an inner semipermeable membrane dialysis bag 2, a middle semipermeable membrane dialysis bag 3 and an outer semipermeable membrane dialysis bag 4, which are arranged in the water reservoir 1; the water inlet is arranged at the head part of the inner semipermeable membrane dialysis bag 2, and the water outlet 5 is arranged at the tail part of the semipermeable membrane dialysis bag.
The upper left of the water receiver 1 is provided with a nitrogen or carbon dioxide gas inlet 6; the right upper part of the water storage device 1 is provided with an exhaust port 7; the middle of the upper surface of the water receiver 1 is provided with an observation window 8; the left lower part of the water receiver 1 is provided with a purified water inlet 9; the lower right of the water reservoir 1 is provided with a water outlet 10.
Further, the innermost layer of the bag and the interlayer between the bags are permeable to water without any impurity, the inner semipermeable membrane dialysis bag 2 is permeable to a molecular weight of 200, the intermediate semipermeable membrane dialysis bag 3 is permeable to a molecular weight of 100, and the outer semipermeable membrane dialysis bag 4 is permeable to a molecular weight of 50.
Further, the joint of the water receiver cover plate and the water receiver 1 is sealed by a sealing ring.
The working principle of the invention is as follows:
1. the high-salt organic wastewater generated in the production process of the hot pickled mustard tuber is precipitated, the solid insoluble impurities which can be precipitated are removed, the length of the bag is not limited, and the bag can be adjusted according to the amount of wastewater generated in actual production.
2. 1000L of the organic wastewater of the hot pickled mustard tuber with the salinity of more than 70 is introduced into a dialysis bag with three layers of thickness, the bag is placed into a water receiver containing 1000L of pure water, nitrogen or carbon dioxide gas is filled into the water receiver, and the water receiver is sealed, so that oxygen in the air is shielded, and bacteria in the wastewater are prevented from growing and breeding. And the water is left for 3 to 72 hours or longer, at this time, the salinity of the pure water is continuously increased to a salinity level of 50 to 100 or more through analysis and detection, and the greening sodium salt water solution with the continuously increased salinity is recovered.
3. The recovered brine solution does not contain amino acid, protein, fat and other organic impurities, so that the brine solution does not have the taste of the preserved szechuan pickle of the original preserved szechuan pickle solution and is not easy to rot caused by bacteria, a certain amount of sodium chloride solid salt can be added to the brine solution to be continuously used for the first pickling in the new preserved szechuan pickle production, and the brine solution can also be used for the second pickling with relatively low salt content and the sodium chloride brine for production in the third pickling in the preserved szechuan pickle production process.
4. The amounts of raw brine and pure water used may be adjusted according to the amount of raw brine, and are not limited to 1000L, and particularly, actual production processes may be changed according to actual production variations.
5. The time for which the high salt organic brine is sealingly placed in the vessel may also vary depending on the actual production temperature. Because the activity of ions in the solution is relatively high at high temperatures, the speed of the ions passing through the semipermeable membrane dialysis bag is relatively high, and thus the time taken for the soluble salt ions to pass through the semipermeable membrane dialysis bag is shortened.
The foregoing description is only of the preferred embodiments of the present invention, and is not intended to limit the invention in any way, but any simple modification, equivalent variation and modification of the above embodiments according to the technical principles of the present invention are within the scope of the technical solutions of the present invention.
Claims (2)
1. The method for recycling the sodium chloride solution in the high-salt preserved szechuan pickle wastewater is characterized by utilizing semi-permeable membranes with different pore diameters to pass through semi-permeable membranes with molecules and ions with different molecular weights; and filtering the water layer by using semipermeable membranes with different apertures, and only filtering sodium chloride into purified water to partially recover the sodium chloride; the molecules, ions, organic matters and sodium chloride which have molecular weight larger than that of sodium chloride are all discharged from a waste water outlet;
the device for recycling the sodium chloride solution in the high-salt preserved szechuan pickle waste water by utilizing the method for recycling the sodium chloride solution in the high-salt preserved szechuan pickle waste water is provided with: a water reservoir;
the semi-permeable membrane dialysis bag is divided into three layers, namely an inner semi-permeable membrane dialysis bag, a middle semi-permeable membrane dialysis bag and an outer semi-permeable membrane dialysis bag, which are placed in the water receiver;
the water inlet is arranged at the head part of the inner semipermeable membrane dialysis bag, and the water outlet is arranged at the tail part of the semipermeable membrane dialysis bag;
the inner layer of the bag and the interlayer between the bag and the bag can be permeated by water without any impurity, the molecular weight of the inner semipermeable membrane dialysis bag can be 200, the molecular weight of the middle semipermeable membrane dialysis bag can be 100, and the molecular weight of the outer semipermeable membrane dialysis bag can be 50.
2. The method for recovering sodium chloride solution from high-salt preserved szechuan pickle waste water as claimed in claim 1, wherein the joint of the water receiver cover plate and the water receiver is sealed by a sealing ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810078646.XA CN108128851B (en) | 2018-01-26 | 2018-01-26 | Method for recycling sodium chloride solution in high-salt preserved szechuan pickle wastewater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810078646.XA CN108128851B (en) | 2018-01-26 | 2018-01-26 | Method for recycling sodium chloride solution in high-salt preserved szechuan pickle wastewater |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108128851A CN108128851A (en) | 2018-06-08 |
| CN108128851B true CN108128851B (en) | 2024-01-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810078646.XA Active CN108128851B (en) | 2018-01-26 | 2018-01-26 | Method for recycling sodium chloride solution in high-salt preserved szechuan pickle wastewater |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108128851B (en) |
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