CN215250021U - Zero discharging device for sodium bed waste brine - Google Patents
Zero discharging device for sodium bed waste brine Download PDFInfo
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- CN215250021U CN215250021U CN202120626585.3U CN202120626585U CN215250021U CN 215250021 U CN215250021 U CN 215250021U CN 202120626585 U CN202120626585 U CN 202120626585U CN 215250021 U CN215250021 U CN 215250021U
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- 239000012267 brine Substances 0.000 title claims abstract description 33
- HPALAKNZSZLMCH-UHFFFAOYSA-M sodium;chloride;hydrate Chemical compound O.[Na+].[Cl-] HPALAKNZSZLMCH-UHFFFAOYSA-M 0.000 title claims abstract description 33
- 239000011734 sodium Substances 0.000 title claims abstract description 24
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 title claims abstract description 22
- 229910052708 sodium Inorganic materials 0.000 title claims abstract description 22
- 239000002699 waste material Substances 0.000 title claims abstract description 20
- 238000007599 discharging Methods 0.000 title description 2
- 239000012528 membrane Substances 0.000 claims abstract description 75
- 239000007788 liquid Substances 0.000 claims abstract description 57
- 238000000926 separation method Methods 0.000 claims abstract description 47
- 239000007787 solid Substances 0.000 claims abstract description 30
- 238000003860 storage Methods 0.000 claims abstract description 23
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims abstract description 19
- 238000009295 crossflow filtration Methods 0.000 claims abstract description 5
- 239000000243 solution Substances 0.000 claims description 9
- 239000003814 drug Substances 0.000 claims description 4
- VTYYLEPIZMXCLO-UHFFFAOYSA-L calcium carbonate Substances [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 abstract description 14
- 229910000019 calcium carbonate Inorganic materials 0.000 abstract description 11
- 238000001556 precipitation Methods 0.000 abstract description 6
- 238000004064 recycling Methods 0.000 abstract description 5
- 239000003513 alkali Substances 0.000 abstract description 4
- 238000011010 flushing procedure Methods 0.000 abstract description 3
- 238000006386 neutralization reaction Methods 0.000 abstract description 2
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 15
- 238000000034 method Methods 0.000 description 9
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 8
- 230000008929 regeneration Effects 0.000 description 8
- 238000011069 regeneration method Methods 0.000 description 8
- 230000008569 process Effects 0.000 description 5
- 239000002351 wastewater Substances 0.000 description 5
- 230000004907 flux Effects 0.000 description 4
- 239000011780 sodium chloride Substances 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 3
- 238000001914 filtration Methods 0.000 description 3
- 150000002500 ions Chemical class 0.000 description 3
- 238000002156 mixing Methods 0.000 description 3
- CDBYLPFSWZWCQE-UHFFFAOYSA-L sodium carbonate Substances [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 3
- 229910000029 sodium carbonate Inorganic materials 0.000 description 3
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000008394 flocculating agent Substances 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 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
- 239000002033 PVDF binder Substances 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000000844 anti-bacterial effect Effects 0.000 description 1
- 239000003899 bactericide agent Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003729 cation exchange resin Substances 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000004035 construction material Substances 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 229910010272 inorganic material Inorganic materials 0.000 description 1
- 239000011147 inorganic material Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 239000011368 organic material Substances 0.000 description 1
- 239000004810 polytetrafluoroethylene Substances 0.000 description 1
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 1
- 229920002981 polyvinylidene fluoride Polymers 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 230000001172 regenerating effect Effects 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 1
- 229910010271 silicon carbide Inorganic materials 0.000 description 1
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- Separation Using Semi-Permeable Membranes (AREA)
Abstract
The utility model discloses a zero discharge device for waste brine of sodium bed, which comprises a diversion tank, a membrane separation device and a recycling brine tankAnd the concentrated solid equipment, the baffling groove is connected with the membrane separation equipment, the membrane separation equipment is respectively connected with the reuse brine tank and the concentrated solid equipment, liquid prepared by concentrated solid equipment returns to the membrane separation equipment, a residual liquid storage tank is additionally arranged between the membrane separation equipment and the concentrated solid equipment, a membrane clear liquid storage tank is additionally arranged between the membrane separation equipment and the reuse brine tank, a liquid inlet is formed in the top of the membrane clear liquid storage tank and used for adding hydrochloric acid, and a compressed air back flushing opening is formed in one side of the top of the membrane clear liquid storage tank. The utility model adopts a baffling mode to carry out double alkali precipitation of Mg (OH)2、CaCO3The solid content of the remaining residual liquid is firstly improved by cross-flow filtration and then solid-liquid separation is carried out, and Ca in the clear liquid2+、Mg2+The total content can be less than 1PPm, and the hydrochloric acid is recycled after neutralization.
Description
Technical Field
The utility model relates to a contain salt effluent treatment plant, concretely relates to sodium bed brine waste zero discharge device.
Background
Na for cation exchange resin is generally used in the water softening process+Substitution of Ca2+、Mg2+Ion, replacement saturation, regeneration with high concentration NaCl, Na+Low conversion content, NaCl concentration, Ca2+、Mg2+The ion is higher, and the environmental pollution is larger when the ion is not processed.
CN104478133A A method and system for recycling sodium bed regeneration waste liquid, the utility model adopts the separation and precipitation of waste water after reaction in a plate frame, and the organic membrane post-treatment is easy to pollute due to small solid content and low separation coefficient, and the flux is low and is only 10-20L/m2About/h, the operation cost and the investment are large; in the process, a flocculating agent is added, so that the resource utilization of the precipitated solid is difficult.
SUMMERY OF THE UTILITY MODEL
In order to solve the technical problems of difficult recovery and large pollution of high-salinity wastewater generated in the resin regeneration process in the prior art, the utility model provides a zero-discharge device for waste salt water of a sodium bed.
The utility model provides a following technical scheme:
the utility model provides a zero row's of sodium bed brine waste device, includes diversion groove (1), membrane separation equipment (2), retrieval and utilization brine tank (4) and dense solid equipment (3), diversion groove (1) is connected with membrane separation equipment (2), membrane separation equipment (2) respectively with retrieval and utilization brine tank (4) and dense solid equipment (3), membrane separation equipment (2) are returned to the liquid that dense solid equipment (3) came out, increase between membrane separation equipment (2) and the dense solid equipment (3) and leave residual liquid storage tank (6), it has membrane clear solution storage tank (5) to increase between membrane separation equipment (2) and retrieval and utilization brine tank (4), open the top of membrane clear solution storage tank (5) has inlet (52) for add hydrochloric acid, open top one side of membrane clear solution storage tank (5) has compressed air back flush (51).
Furthermore, a residual liquid outlet end (21) and a membrane clear liquid outlet end (22) are arranged on the shell of the membrane separation device (2).
Furthermore, a solid outlet (32) and a liquid outlet (31) are arranged at the bottom of the concentrating device (3).
Furthermore, a feed inlet (11) and a medicine feeding port (12) are arranged in the diversion groove (1), and a plurality of baffle plates (13) are arranged at the bottom in the diversion groove (1).
Further, the membrane separation equipment (2) adopts cross flow filtration, and the cross flow speed is 0.1-5 m/s.
Furthermore, the aperture of the membrane tube in the membrane separation equipment (2) is 5nm-1.5 μm.
Further, the recoil pressure of a compressed air recoil opening (51) of the membrane clear liquid storage tank (5) is 1-10 Kg;
further, the concentration equipment (3) is a plate frame, a belt filter or a centrifuge.
Compared with the prior art, the beneficial effects of the utility model are that:
(1) can remove Ca in the sodium bed wastewater brine according to the adjustment of PH2+、Mg2+The filter precision is high, and the total content can be less than 1 PPm;
(2) large operation flux (1000-2000L/m)2The occupied area is small, the investment is small, and the operation cost is low;
(3) precipitation of Mg (OH) without addition of flocculating agent2、CaCO3The resource utilization is easy;
(4) the operation is simple, and the automation control is easy.
Drawings
Fig. 1 is a schematic block diagram of the present invention.
Fig. 2 is a structural diagram of the present invention.
In the figure: 1. a diversion groove 11, a feed inlet 12, a medicine feeding opening 13 and a diversion plate; 2. a membrane separation device 21, a residual liquid outlet end 22 and a membrane clear liquid outlet end; 3. the concentration and fixation device comprises a concentration and fixation device 31, a liquid outlet, a solid outlet 32 and a solid outlet; 4. a reclaimed brine tank; 5. a membrane clear liquid storage tank 51, a compressed air back flushing port 52 and a liquid inlet; 6. and (4) reserving a residual liquid storage tank.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Referring to fig. 1-2, a zero discharge device for sodium bed regeneration waste brine comprises a diversion tank 1, a membrane separation device 2, a reuse brine tank 4 and a concentration equipment 3, wherein the diversion tank 1 is connected with the membrane separation device 2, the membrane separation device 2 is respectively connected with the reuse brine tank 4 and the concentration equipment 3, liquid discharged from the concentration equipment 3 returns to the membrane separation device 2, a residual liquid storage tank 6 is additionally arranged between the membrane separation device 2 and the concentration equipment 3, a membrane clear liquid storage tank 5 is additionally arranged between the membrane separation device 2 and the reuse brine tank 4, a liquid inlet 52 is formed in the top of the membrane clear liquid storage tank 5 and used for adding hydrochloric acid, and a compressed air back flushing port 51 is formed in one side of the top of the membrane clear liquid storage tank 5.
The shell of the membrane separation device 2 is provided with a raffinate outlet 21 and a membrane clear liquid outlet 22.
The bottom of the concentration device 3 is provided with a solid outlet 32 and a liquid outlet 31, the liquid outlet 31 is connected back to the rear end of the diversion trench 1 through a pipeline, and the liquid returns to the membrane separation device 2 for treatment.
A feed inlet 11 and a medicine feeding port 12 are arranged in the diversion groove 1, and a plurality of baffle plates 13 are arranged at the bottom in the diversion groove 1. The baffling groove 1 is internally provided with baffling mode to carry out double-alkali Mg (OH) precipitation2、CaCO3。
A zero discharge method for sodium bed regeneration waste brine specifically comprises the following steps:
s1, adding NaOH into the sodium bed regeneration waste brine to adjust the pH value 8-11, and allowing the mixture to enter a diversion tank 1 to enable Mg to be contained2+To Mg (OH)2↓; according to Ca2+Adding Na with molar concentration excess of 5-20%2CO3Make Ca be2+To CaCO3↓;
s2, filtering and retaining Mg (OH) by a membrane separation device 22、CaCO3And increasing the solids concentration whenThe physical regeneration of the membrane is realized by compressed air recoil when the flux is reduced;
s3, the remaining residual liquid of the membrane separation equipment 2 is discharged from a remaining residual liquid outlet end 21, enters a remaining residual liquid storage tank 6, is pumped into the concentrated solid equipment 3 for solid-liquid separation, the solid from a solid outlet 32 at the bottom of the concentrated solid equipment 3 is recycled, and the liquid from a liquid outlet 31 of the concentrated solid equipment 3 returns to the membrane separation equipment 2;
and S4, feeding the membrane clear liquid from the membrane clear liquid outlet end 22 into a membrane clear liquid storage tank 5, and adding hydrochloric acid to adjust the pH value to be neutral, and blending for recycling.
In step S1, NaOH is added to the inlet 11 of the baffle tank 1 to adjust the PH, and additives such as bactericide may be allowed to be added by stirring, baffling, or mixing through a pipe.
In step S1, Na is added to the inlet 12 of the diversion tank 12CO3The mode can be measured by stirring, baffling or pipeline mixing, and the adding amount can be judged by an online electrochemical instrument such as a PH meter and a hardness meter.
In step S2, the membrane separation device 2 adopts cross-flow filtration with a cross-flow speed of 0.1-5 m/S.
In step S2, the membrane material in the membrane separation device 2 may be an inorganic material, such as ceramic, silicon carbide, metal, or an organic material, such as PVDF or PTFE.
In step S2, the pore diameter of the membrane tube in the membrane separation device 2 is 5nm-1.5 μm.
In step S2, the membrane separation device 2 is a single-stage, multi-stage series or an interstage circulation pump in the middle process.
In the step S2, the recoil pressure of the compressed air recoil opening 51 of the membrane clear liquid storage tank 5 is 1-10 Kg;
in step S3, the concentration device 3 is a plate frame, a belt filter, or a centrifuge.
The amount of hydrochloric acid added to the inlet 52 of the membrane clear solution tank 5 can be determined by an on-line electrochemical meter, such as a PH meter.
The utility model discloses the baffling groove 1, membrane separation equipment 2, retrieval and utilization brine tank 4, the dense equipment 3 that loops through the tube coupling set firmly. The pH is adjusted by arranging a metering pump on a precipitation unit of a double alkali method and adding NaOH to ensure that Mg2+To Mg (OH)2Precipitating with a metering pump and adding Na2CO3Make Ca be2+To CaCO3↓, depositing, removing Mg (OH) by micro-filtering or ultra-filtering membrane2、CaCO3The membrane concentrated solution passes through a plate frame in a curing unit to form Mg (OH)2、CaCO3Resource utilization, adding HCl into the membrane clear liquid to change NaOH into NaCl and H2O, to Na2CO3Changed into NaCl and CO2And H2And O, realizing zero emission and recycling of the sodium bed regeneration waste liquid.
Double alkali precipitation of Mg (OH) by baffled process2、CaCO3The solid content of the remaining residual liquid is firstly improved by cross-flow filtration and then solid-liquid separation is carried out, and Ca in the clear liquid2+、Mg2+The total content can be less than 1PPm, and the hydrochloric acid is recycled after neutralization.
Refining Guilin into sodium bed wastewater of Biotechnology Limited, adding NaOH into a feed inlet to adjust the PH10, and feeding the wastewater into a baffling tank to perform baffling reaction for 20 minutes; adding 1mol/l of Na2CO3Adjusting the pH of 10, introducing into a baffling tank, baffling for 20 minutes, trapping Mg (OH) by silicon carbide2、CaCO3When the solid content is 4-5%, the residual liquid is concentrated and fixedly arranged to be pressed into solid, the total hardness of the clear liquid is less than 0.5PPm, and the PH value is adjusted to 7 for production to be used as regenerated brine.
The utility model can effectively solve the bottleneck problem of recycling the waste brine generated by regenerating the sodium bed, and the flux of the membrane permeation clear liquid is larger and can reach 1000-plus 2000L/m2H, the total hardness is less than 1PPm, and the PH can be adjusted by hydrochloric acid for reuse; solid-liquid separation of the film raffinate Mg (OH)2、CaCO3The solid can be used as a construction material and basically and completely utilized, and other pollution is basically avoided; the process flow is short, the investment is small, the operation is simple, the system can run fully automatically, and the national energy-saving emission-reducing industry guide is met.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (8)
1. The utility model provides a zero row's of sodium bed brine waste device which characterized in that: including baffling groove (1), membrane separation equipment (2), retrieval and utilization brine tank (4) and dense solid equipment (3), baffling groove (1) is connected with membrane separation equipment (2), membrane separation equipment (2) respectively with retrieval and utilization brine tank (4) and dense solid equipment (3), membrane separation equipment (2) are returned to the liquid that dense solid equipment (3) came out, increase between membrane separation equipment (2) and dense solid equipment (3) and have remained liquid storage tank (6), it has membrane clear solution storage tank (5) to increase between membrane separation equipment (2) and retrieval and utilization brine tank (4), open at the top of membrane clear solution storage tank (5) has inlet (52) for add hydrochloric acid, open top one side of membrane clear solution storage tank (5) has compressed air recoil mouth (51).
2. The zero discharge device for sodium bed waste brine according to claim 1, characterized in that: a residual liquid outlet end (21) and a membrane clear liquid outlet end (22) are arranged on the shell of the membrane separation equipment (2).
3. The zero discharge device for sodium bed waste brine according to claim 1, characterized in that: and a solid outlet (32) and a liquid outlet (31) are arranged at the bottom of the concentrating device (3).
4. The zero discharge device for sodium bed waste brine according to claim 1, characterized in that: a feed inlet (11) and a medicine feeding port (12) are arranged in the diversion groove (1), and a plurality of diversion plates (13) are arranged at the bottom in the diversion groove (1).
5. The zero discharge device for sodium bed waste brine according to claim 1, characterized in that: the membrane separation equipment (2) adopts cross flow filtration with the cross flow speed of 0.1-5 m/s.
6. The zero discharge device for sodium bed waste brine according to claim 1, characterized in that: the aperture of the membrane tube in the membrane separation equipment (2) is 5nm-1.5 mu m.
7. The zero discharge device for sodium bed waste brine according to claim 1, characterized in that: the recoil pressure of a compressed air recoil opening (51) of the membrane clear liquid storage tank (5) is 1-10 Kg.
8. The zero discharge device for sodium bed waste brine according to claim 1, characterized in that: the concentration equipment (3) is a plate frame, a belt filter or a centrifuge.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120626585.3U CN215250021U (en) | 2021-03-26 | 2021-03-26 | Zero discharging device for sodium bed waste brine |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120626585.3U CN215250021U (en) | 2021-03-26 | 2021-03-26 | Zero discharging device for sodium bed waste brine |
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| Publication Number | Publication Date |
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| CN215250021U true CN215250021U (en) | 2021-12-21 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113149270A (en) * | 2021-03-26 | 2021-07-23 | 南京弘顺和生物科技有限公司 | Zero discharge device and method for sodium bed waste brine |
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2021
- 2021-03-26 CN CN202120626585.3U patent/CN215250021U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113149270A (en) * | 2021-03-26 | 2021-07-23 | 南京弘顺和生物科技有限公司 | Zero discharge device and method for sodium bed waste brine |
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