CN110194556A - A kind for the treatment of method for high-salinity wastewater in contraposition ester production process - Google Patents
A kind for the treatment of method for high-salinity wastewater in contraposition ester production process Download PDFInfo
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- CN110194556A CN110194556A CN201910547861.4A CN201910547861A CN110194556A CN 110194556 A CN110194556 A CN 110194556A CN 201910547861 A CN201910547861 A CN 201910547861A CN 110194556 A CN110194556 A CN 110194556A
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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
- C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
- C01F11/00—Compounds of calcium, strontium, or barium
- C01F11/18—Carbonates
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
- C01F11/00—Compounds of calcium, strontium, or barium
- C01F11/46—Sulfates
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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
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
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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
- C02F1/38—Treatment of water, waste water, or sewage by centrifugal separation
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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
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/5236—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents
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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
- C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
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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
- C02F2001/007—Processes including a sedimentation step
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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
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/34—Nature of the water, waste water, sewage or sludge to be treated from industrial activities not provided for in groups C02F2103/12 - C02F2103/32
- C02F2103/36—Nature of the water, waste water, sewage or sludge to be treated from industrial activities not provided for in groups C02F2103/12 - C02F2103/32 from the manufacture of organic compounds
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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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
- Y02P20/129—Energy recovery, e.g. by cogeneration, H2recovery or pressure recovery turbines
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Hydrology & Water Resources (AREA)
- Materials Engineering (AREA)
- Separation Of Suspended Particles By Flocculating Agents (AREA)
- Physical Water Treatments (AREA)
- Removal Of Specific Substances (AREA)
Abstract
The present invention relates to technical field of waste water processing, and disclose a kind for the treatment of method for high-salinity wastewater aligned in ester production process, the following steps are included: the waste water aligned in ester production process is discharged into sedimentation basin, carry out precipitation process, sedimentation time is 1~3h, the waste water that precipitating is completed is filtered processing by filter pipe, filter screen is provided in filter pipe, the aperture of filter screen is 200 mesh, the waste water that filtering is completed is discharged into centrifuge separation pond and carries out centrifugal treating, the speed of centrifugal treating is 800~1500r/min.Treatment method for high-salinity wastewater in the contraposition ester production process, it is only handled by single flash in entire technical process, required temperature can carry out auxiliary heating by the waste heat in para-ester synthesis process in distillation treatment process, to greatly save the energy, and required equipment and raw material are relatively common in entire treatment process, and it is cheap, the cost in industrialized production can greatly be reduced.
Description
Technical field
High-salt wastewater processing side the present invention relates to technical field of waste water processing, in specially a kind of contraposition ester production process
Method.
Background technique
Para-ester is the important intermediate of reactive dye, for synthesizing EF type, KN type, M/KM type, ME type etc. containing vinyl sulfone(RemzaolHuo Xingranliaohuoxingjituan)
Fundamental mode reactive dye, reactive dye are securely washable, using easy, cheap and adaptable since chromatography is complete, at
For the most important a class of dyes of the partially synthetic fiber of cellulose fiber peacekeeping, at home and abroad develop all very fast, yield this year
The 20% of dyestuff total amount is alreadyd exceed, is current the second major class of China dye species, in reactive dye, para-ester had both had work
For the amino of diazotising component, and has the reactive group that chemical reaction generates dye-fibre covalent bond can occur, therefore can be significantly
The utilization rate of dyestuff is improved, economy is also increased substantially, and the process for producing para-ester is more complex, is configured from raw material
It to subsequent reactions, needs to chemically react by a series of physical, a large amount of pollutant will be generated during reaction, these
Pollutant is largely present in reaction solution, after production, it is necessary to which these reaction solutions are discharged.
High-salt wastewater refer to total saliferous mass fraction at least 1% waste water its mainly from chemical plant and petroleum and natural
This waste water of such as the acquisition processing of gas contain many kinds of substance (including salt, oil, organic heavy metal and radioactive substance).Saliferous is useless
The way of production of water is extensive, and water also increases year by year.Removal saline sewage in organic pollutant influenced caused by environment to
It closes important.It is handled using bioanalysis, the salts substances of high concentration are inhibited to microorganism, at physico-chemical process
Reason, investment is big, and operating cost is high, and is difficult to reach expected clean-up effect.Such waste water is handled using bioanalysis, still
It is emphasis studied both at home and abroad at present
A certain amount of high-salt wastewater is generated in para-ester production, mixes (chlorination because of salt content height, and for two kinds of salinities
Sodium, sodium sulphate), the direct biochemical treatment difficulty of waste water is big, is the committed step of its processing, conventional desalination to its effective desalination
Method: 1. cool down desalination, can slough part of sulfuric acid sodium, and mother liquor salinity still up to 10% or so 2. multiple-effect evaporation desalination, can be removed sufficiently
Salinity, but the salt generated is to mix dirty salt, can not be utilized, and generate secondary pollution, and energy consumption is high.
It is stringenter to the environment supervision of enterprise after Chinese new environmental law is implemented, in face of current resource under nervous, profit
Sliding situation, the optimization of production technology and resource reutilization means introduce, and become that there is an urgent need to environmentally protective energy-saving and emission-reduction moneys
Source recycles the use of new technology and equipment, and existence or even national economy to enterprise are most important.
Summary of the invention
(1) the technical issues of solving
In view of the deficiencies of the prior art, the present invention provides the high-salt wastewater processing sides in a kind of contraposition ester production process
Method has the advantages that technical process is simple, energy consumption is lower and removal rate is high, solve previous wastewater treatment method higher cost,
The problem of complex process and poor removal effect.
(2) technical solution
For the purpose that the above-mentioned technical process of realization is simple, energy consumption is lower and removal rate is high, the present invention provides following technical side
A kind of case: treatment method for high-salinity wastewater aligned in ester production process, which comprises the following steps:
1) waste water aligned in ester production process is discharged into sedimentation basin, carries out precipitation process；
2) waste water that precipitating is completed is filtered processing by filter pipe；
3) waste water that filtering is completed is discharged into centrifuge separation pond and carries out centrifugal treating；
4) waste liquid after centrifugal treating is discharged into reaction tank, and quick lime is added into reaction tank, collect sediment into
The dry carrying out washing treatment of row；
5) waste liquid that step 4 reaction is completed is discharged into acidification pool, dilute hydrochloric acid is added into acidification pool, and be passed through carbon dioxide
Gas；
6) mixed liquor for reacting completion in step 5 is subjected to precipitating collection, and mixed liquor is discharged into evaporator, tied
It is brilliant；
7) crystallization in step 6 is collected, and the waste water being disposed is discharged into circulatory pool.
Preferably, sedimentation time of the waste water in sedimentation basin is 1~3h in the step 1.
Preferably, filter screen is provided in the filter pipe in the step 2, the aperture of the filter screen is 200 mesh.
Preferably, the speed of centrifugal treating is 800~1500r/min in the step 4.
Preferably, the ratio of the amount of the substance of the dilute hydrochloric acid and quick lime is 1:(1.1~2).
(3) beneficial effect
Compared with prior art, the present invention provides the treatment method for high-salinity wastewater in a kind of contraposition ester production process, tools
It is standby following the utility model has the advantages that
Treatment method for high-salinity wastewater in the contraposition ester production process, only by single flash in entire technical process
Reason, auxiliary heating can be carried out by the waste heat in para-ester synthesis process by distilling required temperature in treatment process, thus
The energy is greatly saved, and required equipment and raw material are relatively common and cheap in entire treatment process, energy
The cost in industrialized production enough can be greatly reduced, in addition in entire treatment process, do not have sundries appearance, obtained product
For gypsum (calcium sulfate), calcium carbonate and sodium chloride, it all can be used for industrial production, to greatly improve para-ester production
The practicability for the treatment of method for high-salinity wastewater in the process.
Specific embodiment
Below in conjunction with the embodiment of the present invention, technical solution in the embodiment of the present invention is clearly and completely retouched
It states, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.Based on the present invention
In embodiment, every other implementation obtained by those of ordinary skill in the art without making creative efforts
Example, shall fall within the protection scope of the present invention.
Treatment method for high-salinity wastewater in a kind of contraposition ester production process, comprising the following steps: ester production process will be aligned
In waste water be discharged into sedimentation basin, carry out precipitation process, the sedimentation time is 1~3h, and the not low of precipitating predominantly removes in waste water
Precipitating, while certain floccules and inorganic matter being stood, the case where blocking in subsequent processes is avoided, will be precipitated
The waste water of completion is filtered processing by filter pipe, and filter screen is provided in filter pipe, and the aperture of filter screen is 200
The aperture of mesh, filter screen is minimum, can filter off partial impurities, and filter screen is detachable, consequently facilitating the later period to equipment ties up
The waste water that filtering is completed is discharged into centrifuge separation pond and carries out centrifugal treating by shield, and the speed of centrifugal treating is 800~1500r/
The purpose of min, centrifugal treating predominantly pass through high speed rotation, filter out some large particulate matters, avoid in subsequent distillation process
It causes blockages, the waste liquid after centrifugal treating is discharged into reaction tank, and quick lime is added into reaction tank, collect sediment
Carrying out washing treatment is dried, being collected into sediment at this time is mainly calcium sulfate, and calcium sulfate is industrial gypsum, and industrial gypsum is collected
Be used directly for the fields such as medical treatment after the completion, to achieve the purpose that waste recycling utilizes, it is whole after completion of the reaction, mix
Closing the high salt ion being primarily present in liquid is calcium ion, sodium ion and chloride ion, and the waste liquid that reaction is completed is discharged into acidification pool, to
The ratio of the amount of the substance of addition dilute hydrochloric acid in acidification pool, dilute hydrochloric acid and quick lime is 1:(1.1~2), and it is passed through excessive titanium dioxide
Carbon gas is precipitated as calcium carbonate in solution at this time, and remaining ion is sodium ion and chloride ion in solution, reacts the mixed of completion
It closes liquid and carries out precipitating collection, and mixed liquor is discharged into evaporator, crystallized, be collected, be collected into after the completion of crystallization
Crystallization is sodium chloride, and sodium chloride can be used for industrial production directly as Nacl, the waste water being disposed finally is discharged into circulation
Pond.
Embodiment one:
Treatment method for high-salinity wastewater in a kind of contraposition ester production process, comprising the following steps: ester production process will be aligned
In waste water be discharged into sedimentation basin, carry out precipitation process, the sedimentation time 1, the waste water that precipitating is completed is by filter pipe progress
Filtration treatment is provided with filter screen in filter pipe, and the aperture of filter screen is 200 mesh, and the waste water that filtering is completed is discharged into centrifugation
Centrifugal treating is carried out in separate tank, the speed of centrifugal treating is 800r/min, the waste liquid after centrifugal treating is discharged into reaction tank,
And quick lime is added into reaction tank, and it collects sediment and carrying out washing treatment is dried, the waste liquid for reacting completion is discharged into acidification pool, to
The ratio of the amount of the substance of addition dilute hydrochloric acid in acidification pool, dilute hydrochloric acid and quick lime is 1:1.1, and is passed through carbon dioxide gas, instead
The mixed liquor that should be completed carries out precipitating collection, and mixed liquor is discharged into evaporator, is crystallized, and is received after the completion of crystallization
Collection, and the waste water being disposed is discharged into circulatory pool.
By the treatment effeciency of such method waste water up to 92%.
Embodiment two:
Treatment method for high-salinity wastewater in a kind of contraposition ester production process, comprising the following steps: ester production process will be aligned
In waste water be discharged into sedimentation basin, carry out precipitation process, sedimentation time 2h, the waste water that precipitating is completed is by filter pipe progress
Filtration treatment is provided with filter screen in filter pipe, and the aperture of filter screen is 200 mesh, and the waste water that filtering is completed is discharged into centrifugation
Centrifugal treating is carried out in separate tank, the speed of centrifugal treating is 1000r/min, and the waste liquid after centrifugal treating is discharged into reaction tank
In, and quick lime is added into reaction tank, it collects sediment and carrying out washing treatment is dried, the waste liquid for reacting completion is discharged into acidification
Pond, is added dilute hydrochloric acid into acidification pool, and the ratio of the amount of the substance of dilute hydrochloric acid and quick lime is 1:1.5, and is passed through carbon dioxide gas
Body, the mixed liquor for reacting completion carries out precipitating collection, and mixed liquor is discharged into evaporator, is crystallized, and crystallization is completed laggard
Row is collected, and the waste water being disposed is discharged into circulatory pool
By the treatment effeciency of such method waste water up to 94%
Embodiment three:
Treatment method for high-salinity wastewater in a kind of contraposition ester production process, comprising the following steps: ester production process will be aligned
In waste water be discharged into sedimentation basin, carry out precipitation process, sedimentation time 3h, the waste water that precipitating is completed is by filter pipe progress
Filtration treatment is provided with filter screen in filter pipe, and the aperture of filter screen is 200 mesh, and the waste water that filtering is completed is discharged into centrifugation
Centrifugal treating is carried out in separate tank, the speed of centrifugal treating is 1200r/min, and the waste liquid after centrifugal treating is discharged into reaction tank
In, and quick lime is added into reaction tank, it collects sediment and carrying out washing treatment is dried, the waste liquid for reacting completion is discharged into acidification
Pond, is added dilute hydrochloric acid into acidification pool, and the ratio of the amount of the substance of dilute hydrochloric acid and quick lime is 1:1.5, and is passed through carbon dioxide gas
Body, the mixed liquor for reacting completion carries out precipitating collection, and mixed liquor is discharged into evaporator, is crystallized, and crystallization is completed laggard
Row is collected, and the waste water being disposed is discharged into circulatory pool.
By the treatment effeciency of such method waste water up to 95%.
Experimental example four:
Treatment method for high-salinity wastewater in a kind of contraposition ester production process, comprising the following steps: ester production process will be aligned
In waste water be discharged into sedimentation basin, carry out precipitation process, sedimentation time 3h, the waste water that precipitating is completed is by filter pipe progress
Filtration treatment is provided with filter screen in filter pipe, and the aperture of filter screen is 200 mesh, and the waste water that filtering is completed is discharged into centrifugation
Centrifugal treating is carried out in separate tank, the speed of centrifugal treating is 1500r/min, and the waste liquid after centrifugal treating is discharged into reaction tank
In, and quick lime is added into reaction tank, it collects sediment and carrying out washing treatment is dried, the waste liquid for reacting completion is discharged into acidification
Pond, is added dilute hydrochloric acid into acidification pool, and the ratio of the amount of the substance of dilute hydrochloric acid and quick lime is 1:2, and is passed through carbon dioxide gas,
The mixed liquor that reaction is completed carries out precipitating collection, and mixed liquor is discharged into evaporator, is crystallized, and is received after the completion of crystallization
Collection, and the waste water being disposed is discharged into circulatory pool.
By the treatment effeciency of such method waste water up to 98%.
Experimental example five:
Treatment method for high-salinity wastewater in a kind of contraposition ester production process, comprising the following steps: ester production process will be aligned
In waste water be discharged into sedimentation basin, carry out precipitation process, sedimentation time 3h, the waste water that precipitating is completed is by filter pipe progress
Filtration treatment is provided with filter screen in filter pipe, and the aperture of filter screen is 200 mesh, and the waste water that filtering is completed is discharged into centrifugation
Centrifugal treating is carried out in separate tank, the speed of centrifugal treating is 1400r/min, and the waste liquid after centrifugal treating is discharged into reaction tank
In, and quick lime is added into reaction tank, it collects sediment and carrying out washing treatment is dried, the waste liquid for reacting completion is discharged into acidification
Pond, is added dilute hydrochloric acid into acidification pool, and the ratio of the amount of the substance of dilute hydrochloric acid and quick lime is 1:1.8, and is passed through carbon dioxide gas
Body, the mixed liquor for reacting completion carries out precipitating collection, and mixed liquor is discharged into evaporator, is crystallized, and crystallization is completed laggard
Row is collected, and the waste water being disposed is discharged into circulatory pool.
By the treatment effeciency of such method waste water up to 96%
Beneficial effects of the present invention: the treatment method for high-salinity wastewater in the contraposition ester production process, in entire technical process
Only by single flash handle, distill treatment process in required temperature can by the waste heat in para-ester synthesis process into
Row auxiliary heating, to greatly save the energy, and required equipment and raw material are relatively more normal in entire treatment process
See, and cheap, the cost in industrialized production can greatly be reduced, in addition in entire treatment process, does not have sundries
Occur, obtained product is gypsum (calcium sulfate), calcium carbonate and sodium chloride, all can be used for industrial production, thus greatly
Improve the practicability of the treatment method for high-salinity wastewater in the contraposition ester production process.
It although an embodiment of the present invention has been shown and described, for the ordinary skill in the art, can be with
A variety of variations, modification, replacement can be carried out to these embodiments without departing from the principles and spirit of the present invention by understanding
And modification, the scope of the present invention is defined by the appended.
Claims (5)
1. the treatment method for high-salinity wastewater in a kind of contraposition ester production process, which comprises the following steps:
1) waste water aligned in ester production process is discharged into sedimentation basin, carries out precipitation process；
2) waste water that precipitating is completed is filtered processing by filter pipe；
3) waste water that filtering is completed is discharged into centrifuge separation pond and carries out centrifugal treating；
4) waste liquid after centrifugal treating is discharged into reaction tank, and quick lime is added into reaction tank, collected sediment and done
Dry carrying out washing treatment；
5) waste liquid that step 4 reaction is completed is discharged into acidification pool, dilute hydrochloric acid is added into acidification pool, and be passed through carbon dioxide gas
Body；
6) mixed liquor for reacting completion in step 5 is subjected to precipitating collection, and mixed liquor is discharged into evaporator, crystallized；
7) crystallization in step 6 is collected, and the waste water being disposed is discharged into circulatory pool.
2. the treatment method for high-salinity wastewater in a kind of contraposition ester production process according to claim 1, which is characterized in that institute
Stating sedimentation time of the waste water in sedimentation basin in step 1 is 1~3h.
3. the treatment method for high-salinity wastewater in a kind of contraposition ester production process according to claim 1, which is characterized in that institute
It states and is provided with filter screen in the filter pipe in step 2, the aperture of the filter screen is 200 mesh.
4. the treatment method for high-salinity wastewater in a kind of contraposition ester production process according to claim 1, which is characterized in that institute
The speed for stating centrifugal treating in step 4 is 800~1500r/min.
5. the treatment method for high-salinity wastewater in a kind of contraposition ester production process according to claim 1, which is characterized in that institute
The ratio for stating the amount of the substance of dilute hydrochloric acid and quick lime is 1:(1.1~2).
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001026418A (en) * | 1999-07-16 | 2001-01-30 | Taiheiyo Cement Corp | Recovering method of industrially useful inorganic material and industrially useful inorganic material recovered by the same |
| CN103964609A (en) * | 2014-05-16 | 2014-08-06 | 天津海普尔膜科技有限公司 | Membrane treatment method of landfill leachate concentrate |
| CN109095682A (en) * | 2018-08-31 | 2018-12-28 | 广东粤电靖海发电有限公司 | Desulphurization for Coal-fired Power Plant Waste water concentrating sofening treatment method and device |
| CN109205921A (en) * | 2017-06-29 | 2019-01-15 | 开封市隆兴化工有限公司 | Align treatment method for high-salinity wastewater in ester production process |
-
2019
- 2019-06-24 CN CN201910547861.4A patent/CN110194556A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001026418A (en) * | 1999-07-16 | 2001-01-30 | Taiheiyo Cement Corp | Recovering method of industrially useful inorganic material and industrially useful inorganic material recovered by the same |
| CN103964609A (en) * | 2014-05-16 | 2014-08-06 | 天津海普尔膜科技有限公司 | Membrane treatment method of landfill leachate concentrate |
| CN109205921A (en) * | 2017-06-29 | 2019-01-15 | 开封市隆兴化工有限公司 | Align treatment method for high-salinity wastewater in ester production process |
| CN109095682A (en) * | 2018-08-31 | 2018-12-28 | 广东粤电靖海发电有限公司 | Desulphurization for Coal-fired Power Plant Waste water concentrating sofening treatment method and device |
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