CN110217928A - A kind of sub-prime method of the strand industry with sodium chloride in high-salt wastewater and sodium sulphate - Google Patents
A kind of sub-prime method of the strand industry with sodium chloride in high-salt wastewater and sodium sulphate Download PDFInfo
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- 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
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- 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
- C01D3/14—Purification
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01D—COMPOUNDS OF ALKALI METALS, i.e. LITHIUM, SODIUM, POTASSIUM, RUBIDIUM, CAESIUM, OR FRANCIUM
- C01D5/00—Sulfates or sulfites of sodium, potassium or alkali metals in general
- C01D5/16—Purification
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
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- 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
- C02F1/02—Treatment of water, waste water, or sewage by heating
- C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
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- 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
- C02F1/28—Treatment of water, waste water, or sewage by sorption
- C02F1/281—Treatment of water, waste water, or sewage by sorption using inorganic sorbents
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- 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
- C02F1/28—Treatment of water, waste water, or sewage by sorption
- C02F1/283—Treatment of water, waste water, or sewage by sorption using coal, charred products, or inorganic mixtures containing them
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- 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
- C02F1/441—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by reverse osmosis
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- 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
- C02F1/442—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by nanofiltration
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- 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
- C02F1/444—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by ultrafiltration or microfiltration
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A20/00—Water conservation; Efficient water supply; Efficient water use
- Y02A20/124—Water desalination
- Y02A20/131—Reverse-osmosis
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Abstract
A kind of sub-prime method with sodium chloride in high-salt wastewater and sodium sulphate that the invention discloses strand industry, divalent salts and partial organic substances are separated from monovalent salt using nanofiltration membrane property, the higher solid sodium sulfate of purity is obtained by thermal method solventing-out, and using vibrating membrane as nanofiltration membrane, its advantage is to be capable of handling the very big waste water of salinity, then pass through counter-infiltration system, effectively removing monovalent salt, the solid sodium chloride of good purity is obtained after evaporative crystallization, nanofiltration is used for reverse osmosis pre-treatment, the seawater salinity of reverse osmosis membrane assembly can be lowered into, it creates conditions to improve seawater desalination recovery rate；This method has process reasonable, can resource reclaim, economical and efficient, stable feature can be very good to make up the deficiency in existing high-salt wastewater inorganic salts sub-prime technology, and concentrate processing with high salt is made to reach the target of " solid, liquid zero-emission ".
Description
Technical field
The present invention relates to inorganic salts sub-prime technical field in waste water, chlorination in specially a kind of strand industry band high-salt wastewater
The sub-prime method of sodium and sodium sulphate.
Background technique
Nowadays, great attention of the environmental problem by the mankind, the effective use of high-salt wastewater and is treated as more and more
The concern main points of Enterprise Project.In some enterprises of strand industry band, the with high salt of a large amount of sodium chloride-containing and sodium sulphate can be generated
Waste water.It currently, many enterprises, which are actively equipped with evaporated crystallization device, handles this kind of high-salt wastewater, but is essentially all direct evaporation knot
Crystalline substance obtains carnallite, and the solid carnallite complicated component that this method generates not only can not achieve resource utilization, can be considered as instead
Solid waste, even danger wastes need further to dispose.It not only be easy to cause the secondary pollution of environment in this way,
Return the dangerous waste disposal costs that enterprise causes great number.
Based on this, patent No. ZL201110461060.X discloses a kind of group technology processing sulfur acid based on nanofiltration membrane
The sewage of sodium and sodium chloride, but its raw water needs are diluted with water, and are higher than sodium sulphate content or two kinds for sodium chloride content
The comparable high-salt wastewater of salt content, can be by using the purity and yield of its obtained sodium chloride of method and sodium sulphate product announced
To certain limitation.As it can be seen that the prior art cannot the inorganic salts sub-prime to high slat-containing wastewater reach high-recovery and high-purity
Guarantee.
Summary of the invention
The purpose of the present invention is to provide chlorinations in a kind of reliable, economic, efficient, energy-efficient strand industry band high-salt wastewater
The sub-prime method of sodium and sodium sulphate realizes high-salt wastewater maximum resource utilizationization, to solve mentioned above in the background art ask
Topic.
To achieve the above object, the invention provides the following technical scheme:
A kind of sub-prime method of the strand industry with sodium chloride in high-salt wastewater and sodium sulphate, comprising the following steps:
Step 1: establishing two reaction tanks in strand industry band high-salt wastewater discharge region, respectively the first reaction tank and the
Two reaction tanks, the first reaction tank are directly connect with strand industry band high-salt wastewater discharge outlet by pipeline, and the second reaction tank passes through
Pipeline is connect with the first reaction tank, and the water pump by being mounted on the second reaction tank side is pumped；
Step 2: being laid with a thickness 20cm in the bottom of the first reaction tank, the active carbon particle layer of granularity 1cm, second is anti-
Bottom, the middle part of Ying Chi uses sieve to be laid with a thickness 10cm, the double-layer active carbon stratum granulosum of granularity 0.5cm；
Step 3: will be pumped through the high-salt wastewater that active carbon slightly adsorbs to the second reaction tank in the first reaction tank by water pump
It is interior, and stand the removal of hour progress organic matter and oil；
Step 4: the supernatant outlet end in the second reaction tank is connected to helical form micro-filtrate, the filtering of helical form micro-filtrate
Liquid output end is communicated with hold-up tank；
Step 5: connecting nanofiltration pipeline at the wastewater outlet end of hold-up tank, the other end of nanofiltration pipeline passes through nanofiltration system point
From obtaining nanofiltration membrane permeate and nanofiltration membrane concentrate；
Step 6: nanofiltration membrane concentrate obtained in step 5 being handled by thermal method solventing-out, sodium sulphate, knot is precipitated
The brilliant dry purity salt of salt reaches dry I class standard of salt level-one of industry or more；
Step 7: nanofiltration permeate liquid obtained in step 5 being pressurizeed by high-pressure pump, then by reverse osmosis membrane filtration, forms one
Reverse osmosis treatment system is covered, 70-90% is reached to the removal efficiency of monovalent salt, further obtains reverse osmosis membrane permeate and reverse osmosis
Permeable membrane concentrate；
Step 8: reverse osmosis concentrated liquid in step 7 being obtained into sodium chloride crystal by evaporation and crystallization system, the steaming evaporated
Vapour is used as reuse after forming condensed water.
Further, in step 1, the discharge tube of the first reaction tank is erected at the upper port of the second reaction tank, and manages
The nozzle in road is corresponding with disk, and the bottom of disk is fixed on the inner sidewall of the second reaction tank by L-type support rod.
Further, the high-salt wastewater being emitted in the first reaction tank in step 3 need to stand hour or more, and take upper layer
Suspension is pumped to the second reaction tank.
Further, microfiltration membranes, microfiltration membranes table are filled at each node in step 4 inside helical form micro-filtrate
Face is coarse fluorocarbon, suspended matter, bacterium, colloid in removable water.
Further, nanofiltration membrane is filled in step 5 in nanofiltration pipeline, nanofiltration membrane selection reaches the removal efficiency of divalent salts
To 90% or more vibrating membrane.
Further, thermal method solventing-out processing method in step 6 are as follows:
Step 601: preheating nanofiltration membrane concentrate makes nanofiltration membrane concentrate reach bubble point；
Step 602: by the laggard promoting the circulation of qi liquid separating treatment of nanofiltration membrane concentrate evaporation process after preheating, obtaining unsaturation and receive
Filter membrane concentrate；
Step 603: unsaturated nanofiltration membrane concentrate being concentrated by evaporation again, until sodium sulphate is concentrated in nanofiltration membrane concentrate
For nearly saturation state, obtain closely being saturated concentrate；
Step 604: nearly saturation concentrate cooling freezing obtains saltcake crystal and analysis nitre mother liquor；
Step 605: saltcake crystal is heated, saltcake is dissolved in itself crystallization water, and sodium sulphate is precipitated, after separation of solid and liquid
To sodium sulfate crystal and saturation metabisulfite solution, condensing crystallizing is evaporated to the saturation metabisulfite solution, obtains sodium sulphate
Crystal.
Further, salinity of the strand industry with high-salt wastewater is 80-100g/L.
Compared with prior art, the beneficial effects of the present invention are:
A kind of sub-prime method of the strand industry provided by the invention with sodium chloride in high-salt wastewater and sodium sulphate, utilizes nanofiltration
Membrane property separates divalent salts and partial organic substances from monovalent salt, obtains the higher sulphur of purity by thermal method solventing-out
Sour sodium solid, and using vibrating membrane as nanofiltration membrane, its advantage is to be capable of handling the very big waste water of salinity, is then led to
Counter-infiltration system is crossed, effectively removing monovalent salt, the solid sodium chloride of good purity is obtained after evaporative crystallization, nanofiltration is used for instead
The pre-treatment of infiltration can be lowered into the seawater salinity of reverse osmosis membrane assembly, create conditions to improve seawater desalination recovery rate；It should
Method has process reasonable, can resource reclaim, economical and efficient, stable feature can be very good to make up existing with high salt useless
Deficiency in water inorganic salts sub-prime technology makes concentrate processing with high salt reach the target of " solid, liquid zero-emission ".
Detailed description of the invention
Fig. 1 is the structural diagram of the present invention；
Fig. 2 is flow chart of the method for the present invention.
In figure: 1 first reaction tank, 2 second reaction tanks, 3 water pumps, 4 disks, 5L type support rod, 6 helical form micro-filtrates, 7 storages
Deposit tank, 8 nanofiltration pipelines, 9 high-pressure pumps, 10 reverse osmosis membranes.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
Referring to FIG. 1-2, in the embodiment of the present invention: sodium chloride and sodium sulphate in a kind of strand industry band high-salt wastewater are provided
Sub-prime method, comprising the following steps:
Step 1: two reaction tanks, 1 He of respectively the first reaction tank are established in strand industry band high-salt wastewater discharge region
Second reaction tank 2, for acquiring the high-salt wastewater of strand industry band, wherein the first reaction tank 1 by pipeline directly with strand work
Industry band high-salt wastewater discharge outlet connects, and the second reaction tank 2 is connect by pipeline with the first reaction tank 1, and anti-by being mounted on second
The water pump 3 of 2 side of pond is answered to be pumped；
Step 2: the first reaction tank 1 bottom be laid with a thickness 20cm, the active carbon particle layer of granularity 1cm, second
Bottom, the middle part of reaction tank 2 use sieve to be laid with a thickness 10cm, and the double-layer active carbon stratum granulosum of granularity 0.5cm passes through work
Property charcoal stratum granulosum laying realize physical absorption to water quality；
Step 3: it will be pumped through the high-salt wastewater that active carbon slightly adsorbs to the second reaction in first reaction tank 1 by water pump 3
In pond 2, and stand the removal for carrying out organic matter and oil in 2 hours；
Step 4: the supernatant outlet end in the second reaction tank 2 is connected to helical form micro-filtrate 6, helical form micro-filtrate 6
Filtered fluid output end is communicated with hold-up tank 7；
Step 5: nanofiltration pipeline 8 is connected at the wastewater outlet end of hold-up tank 7, the other end of nanofiltration pipeline 8 passes through nanofiltration system
It unites isolated nanofiltration membrane permeate and nanofiltration membrane concentrate；
Step 6: nanofiltration membrane concentrate obtained in step 5 is handled by thermal method solventing-out, and sodium sulphate is precipitated,
The dry purity salt of crystal salt reaches dry I class standard of salt level-one of industry or more；
Step 7: nanofiltration permeate liquid obtained in step 5 is pressurizeed by high-pressure pump 9, then is filtered by reverse osmosis membrane 10, shape
At a set of reverse osmosis treatment system, 70-90% is reached to the removal efficiency of monovalent salt, further obtain reverse osmosis membrane permeate and
Reverse osmosis membrane concentrate；
Step 8: reverse osmosis concentrated liquid in step 7 is obtained into sodium chloride crystal by evaporation and crystallization system, the steaming evaporated
Vapour is used as reuse after forming condensed water.
In the present embodiment, in step 1, the discharge tube of the first reaction tank 1 is erected at the upper port of the second reaction tank 2, and
The nozzle of pipeline is corresponding with disk 4, and the bottom of disk 4 is fixed on the inner sidewall of the second reaction tank 2 by L-type support rod 5, leads to
The setting for crossing disk 4, the waste water passed through in the second reaction tank 2 is in the form of annular discs unrestrained, extends shunting time and the matter of waste water
Amount, in order to which active carbon reaches better adsorption effect.
The high-salt wastewater being emitted in the first reaction tank 1 in the present embodiment, in step 3 need to stand 1 hour or more, and take
Layer suspension is pumped to the second reaction tank 2, so that waste water reaches preliminary pretreated effect in the first reaction tank 1, is convenient for
The purification of later period waste water.
In the present embodiment, microfiltration membranes, microfiltration membranes are filled at each node in step 4 inside helical form micro-filtrate 6
Surface is coarse fluorocarbon, suspended matter, bacterium, colloid in removable water.
In the present embodiment, nanofiltration membrane is filled in step 5 in nanofiltration pipeline 8, nanofiltration membrane selects the removal efficiency to divalent salts
Reach 90% or more vibrating membrane.
In the present embodiment, thermal method solventing-out processing method in step 6 are as follows:
Step 601: preheating nanofiltration membrane concentrate makes nanofiltration membrane concentrate reach bubble point；
Step 602: by the laggard promoting the circulation of qi liquid separating treatment of nanofiltration membrane concentrate evaporation process after preheating, obtaining unsaturation and receive
Filter membrane concentrate；
Step 603: unsaturated nanofiltration membrane concentrate being concentrated by evaporation again, until sodium sulphate is concentrated in nanofiltration membrane concentrate
For nearly saturation state, obtain closely being saturated concentrate；
Step 604: nearly saturation concentrate cooling freezing obtains saltcake crystal and analysis nitre mother liquor；
Step 605: saltcake crystal is heated, saltcake is dissolved in itself crystallization water, and sodium sulphate is precipitated, after separation of solid and liquid
To sodium sulfate crystal and saturation metabisulfite solution, condensing crystallizing is evaporated to the saturation metabisulfite solution, obtains sodium sulphate
Crystal.
In order to further preferably illustrate above method bring high efficiency effect in actual use, provide as follows
Specific example:
Case study on implementation one:
By taking salinity of the Tianjin strand industry with high-salt wastewater is approximately 100g/L as an example:
Step 1: establishing two reaction tanks, 1 He of respectively the first reaction tank in strand industry band high-salt wastewater discharge region
Second reaction tank 2, by aforesaid operations the first reaction tank 1 bottom be laid with active carbon particle layer, the bottom of the second reaction tank 2,
Middle part is laid with double-layer active carbon stratum granulosum, by Activated Carbon Pretreatment, removes the partial organic substances and oil in waste water, through to the
The detection of two reaction tanks, 2 upper layer suspension, TOC removal rate can reach 83.5%, and the removal rate of total oil can reach 93%, and coloration is small
In 50；
Step 2: entering helical form micro-filtrate 6 for pretreated waste water is passed through in the second reaction tank 2, go in water removal
Suspended matter, bacterium, colloid etc., so as to the progress of subsequent step, by micro-filtration treated high-salt wastewater enters nanofiltration pipeline 8 and
Nanofiltration system, wherein nanofiltration membrane selects vibrating membrane, and compare other nanofiltration membranes, wastewater treatment of this kind of film for high salt concentration
Effect is more preferable, can effectively catching divalent ion to achieve the purpose that sub-prime；
Step 3: higher, yield is greater than 90% sodium sulfate crystal by thermal method solventing-out method precipitation purity, according to
Practical operation, the principal element for influencing crystal eduction rate is temperature, stirring rate, and by nanofiltration, treated that waste water enters reverse osmosis
Permeable system, the trapped fluid contain the inorganic salts based on sodium chloride, by evaporation and crystallization system, obtain monovalent salt sodium chloride, knot
Sodium chloride crystal salt is obtained after crystalline substance is dry, yield can reach 70%-90%, after the vapor in evaporation process becomes condensed water
As recycle-water, the solid sodium sulfate and solid sodium chloride impurity finally obtained is less, and purity reaches the dry salt level-one (I class) of industry
More than standard, it can be achieved that resource reclaim.
In summary: a kind of sub-prime side of the strand industry with sodium chloride and sodium sulphate in high-salt wastewater provided by the invention
Divalent salts and partial organic substances are separated from monovalent salt using nanofiltration membrane property, are obtained by thermal method solventing-out by method
The higher solid sodium sulfate of purity, and using vibrating membrane as nanofiltration membrane, its advantage is that be capable of handling salinity very big
Waste water, then by counter-infiltration system, effectively removing monovalent salt, the sodium chloride that good purity is obtained after evaporative crystallization are solid
Nanofiltration is used for reverse osmosis pre-treatment by body, can be lowered into the seawater salinity of reverse osmosis membrane assembly, is returned to improve sea water desalination
Yield creates conditions；This method has process reasonable, can resource reclaim, economical and efficient, stable feature can be very good
The deficiency in existing high-salt wastewater inorganic salts sub-prime technology is made up, concentrate processing with high salt is made to reach the mesh of " solid, liquid zero-emission "
Mark.
The foregoing is only a preferred embodiment of the present invention, but scope of protection of the present invention is not limited thereto,
Anyone skilled in the art within the technical scope of the present disclosure, according to the technique and scheme of the present invention and its
Inventive concept is subject to equivalent substitution or change, should be covered by the protection scope of the present invention.
Claims (7)
1. a kind of sub-prime method of strand industry with sodium chloride in high-salt wastewater and sodium sulphate, which is characterized in that including following step
It is rapid:
Step 1: establishing two reaction tanks in strand industry band high-salt wastewater discharge region, respectively the first reaction tank (1) and the
Two reaction tanks (2), the first reaction tank (1) are directly connect with strand industry band high-salt wastewater discharge outlet by pipeline, the second reaction
Pond (2) is connect by pipeline with the first reaction tank (1), and the water pump (3) by being mounted on the second reaction tank (2) side is taken out
It send；
Step 2: being laid with a thickness 20cm in the bottom of the first reaction tank (1), the active carbon particle layer of granularity 1cm, second is anti-
Bottom, the middle part of Ying Chi (2) uses sieve to be laid with a thickness 10cm, the double-layer active carbon stratum granulosum of granularity 0.5cm；
Step 3: will be pumped through the high-salt wastewater that active carbon slightly adsorbs to the second reaction in the first reaction tank (1) by water pump (3)
In pond (2), and stand the removal for carrying out organic matter and oil in 2 hours；
Step 4: the supernatant outlet end in the second reaction tank (2) is connected to helical form micro-filtrate (6), helical form micro-filtrate (6)
Filtered fluid output end be communicated with hold-up tank (7)；
Step 5: connecting nanofiltration pipeline (8) at the wastewater outlet end of hold-up tank (7), the other end of nanofiltration pipeline (8) passes through nanofiltration
The isolated nanofiltration membrane permeate of system and nanofiltration membrane concentrate；
Step 6: nanofiltration membrane concentrate obtained in step 5 being handled by thermal method solventing-out, sodium sulphate, crystal salt is precipitated
Dry purity salt reaches dry I class standard of salt level-one of industry or more；
Step 7: nanofiltration permeate liquid obtained in step 5 being pressurizeed by high-pressure pump (9), then is filtered by reverse osmosis membrane (10), shape
At a set of reverse osmosis treatment system, 70-90% is reached to the removal efficiency of monovalent salt, further obtain reverse osmosis membrane permeate and
Reverse osmosis membrane concentrate；
Step 8: reverse osmosis concentrated liquid in step 7 being obtained into sodium chloride crystal by evaporation and crystallization system, the steam shape evaporated
At after condensed water be used as reuse.
2. a kind of sub-prime method of the strand industry with sodium chloride in high-salt wastewater and sodium sulphate as described in claim 1, special
Sign is, in step 1, the discharge tube of the first reaction tank (1) is erected at the upper port of the second reaction tank (2), and the spray of pipeline
It is corresponding with disk (4) at mouthful, the bottom of disk (4) is fixed on the inner sidewall of the second reaction tank (2) by L-type support rod (5).
3. a kind of sub-prime method of the strand industry with sodium chloride in high-salt wastewater and sodium sulphate as described in claim 1, special
Sign is that the high-salt wastewater being emitted in the first reaction tank (1) in step 3 need to stand 1 hour or more, and upper layer suspension is taken to take out
It send to the second reaction tank (2).
4. a kind of sub-prime method of the strand industry with sodium chloride in high-salt wastewater and sodium sulphate as described in claim 1, special
Sign is, is filled with microfiltration membranes in step 4 at the internal each node of helical form micro-filtrate (6), and micro-filtration film surface is coarse
Fluorocarbon, can remove water in suspended matter, bacterium, colloid.
5. a kind of sub-prime method of the strand industry with sodium chloride in high-salt wastewater and sodium sulphate as described in claim 1, special
Sign is, is filled with nanofiltration membrane in step 5 in nanofiltration pipeline (8), nanofiltration membrane select to the removal efficiency of divalent salts reach 90% with
On vibrating membrane.
6. a kind of sub-prime method of the strand industry with sodium chloride in high-salt wastewater and sodium sulphate as described in claim 1, special
Sign is, thermal method solventing-out processing method in step 6 are as follows:
Step 601: preheating nanofiltration membrane concentrate makes nanofiltration membrane concentrate reach bubble point；
Step 602: by the laggard promoting the circulation of qi liquid separating treatment of nanofiltration membrane concentrate evaporation process after preheating, obtaining unsaturated nanofiltration membrane
Concentrate；
Step 603: unsaturated nanofiltration membrane concentrate being concentrated by evaporation again, until sodium sulphate concentration is close in nanofiltration membrane concentrate
Saturation state obtains closely being saturated concentrate；
Step 604: nearly saturation concentrate cooling freezing obtains saltcake crystal and analysis nitre mother liquor；
Step 605: saltcake crystal being heated, saltcake is dissolved in itself crystallization water, and sodium sulphate is precipitated, and sulphur is obtained after separation of solid and liquid
Sour sodium crystal and saturation metabisulfite solution, are evaporated condensing crystallizing to the saturation metabisulfite solution, obtain sodium sulfate crystal.
7. a kind of sub-prime method of the strand industry with sodium chloride in high-salt wastewater and sodium sulphate as described in claim 1, special
Sign is that salinity of the strand industry with high-salt wastewater is 80-100g/L.
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204778991U (en) * | 2015-07-06 | 2015-11-18 | 重庆泰克环保工程设备有限公司 | Novel sewage whirl mixes device |
| CN205850319U (en) * | 2016-04-27 | 2017-01-04 | 重庆泰克环保科技股份有限公司 | Novel inclined tube vertical sedimentation tank |
| CN108439693A (en) * | 2018-06-07 | 2018-08-24 | 广西壮族自治区环境保护科学研究院 | A kind of tube microfiltration membrane treatment process of lead-zinc smelting wastewater |
| CN109529422A (en) * | 2018-12-14 | 2019-03-29 | 安徽菲利特过滤系统股份有限公司 | A kind of water distributor of sandrock filter |
| CN208667421U (en) * | 2018-07-16 | 2019-03-29 | 南京工业大学 | A kind of high-salinity wastewater zero-emission processing unit based on nanofiltration membrane allotment |
-
2019
- 2019-04-25 CN CN201910341105.6A patent/CN110217928A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204778991U (en) * | 2015-07-06 | 2015-11-18 | 重庆泰克环保工程设备有限公司 | Novel sewage whirl mixes device |
| CN205850319U (en) * | 2016-04-27 | 2017-01-04 | 重庆泰克环保科技股份有限公司 | Novel inclined tube vertical sedimentation tank |
| CN108439693A (en) * | 2018-06-07 | 2018-08-24 | 广西壮族自治区环境保护科学研究院 | A kind of tube microfiltration membrane treatment process of lead-zinc smelting wastewater |
| CN208667421U (en) * | 2018-07-16 | 2019-03-29 | 南京工业大学 | A kind of high-salinity wastewater zero-emission processing unit based on nanofiltration membrane allotment |
| CN109529422A (en) * | 2018-12-14 | 2019-03-29 | 安徽菲利特过滤系统股份有限公司 | A kind of water distributor of sandrock filter |
Non-Patent Citations (3)
| Title |
|---|
| 安树林: "《膜科学技术实用教程》", 28 February 2005 * |
| 杨秋华: "《大学化学实验》", 31 May 2012, 天津大学出版社 * |
| 江体乾: "《化工工艺手册》", 28 February 1992, 上海科学技术出版社 * |
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