CN106186537A - A kind of evaporative crystallization new technology of high salt high concentrated organic wastewater - Google Patents
A kind of evaporative crystallization new technology of high salt high concentrated organic wastewater Download PDFInfo
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- CN106186537A CN106186537A CN201610669568.1A CN201610669568A CN106186537A CN 106186537 A CN106186537 A CN 106186537A CN 201610669568 A CN201610669568 A CN 201610669568A CN 106186537 A CN106186537 A CN 106186537A
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- 239000002351 wastewater Substances 0.000 title claims abstract description 50
- 238000002425 crystallisation Methods 0.000 title claims abstract description 46
- 230000008025 crystallization Effects 0.000 title claims abstract description 46
- 150000003839 salts Chemical class 0.000 title claims abstract description 24
- 238000005516 engineering process Methods 0.000 title claims abstract description 18
- 238000001704 evaporation Methods 0.000 claims abstract description 46
- 230000008020 evaporation Effects 0.000 claims abstract description 42
- 238000000034 method Methods 0.000 claims abstract description 29
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 claims abstract description 24
- 230000003197 catalytic effect Effects 0.000 claims abstract description 16
- 230000003647 oxidation Effects 0.000 claims abstract description 16
- 238000007254 oxidation reaction Methods 0.000 claims abstract description 16
- 239000007788 liquid Substances 0.000 claims abstract description 15
- 230000008569 process Effects 0.000 claims abstract description 15
- 238000000926 separation method Methods 0.000 claims abstract description 13
- 239000013078 crystal Substances 0.000 claims abstract description 12
- 239000011780 sodium chloride Substances 0.000 claims abstract description 12
- 238000007670 refining Methods 0.000 claims abstract description 4
- 239000003921 oil Substances 0.000 claims description 12
- 239000000126 substance Substances 0.000 claims description 11
- 230000000694 effects Effects 0.000 claims description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 8
- 239000007800 oxidant agent Substances 0.000 claims description 7
- 230000001590 oxidative effect Effects 0.000 claims description 7
- 239000003054 catalyst Substances 0.000 claims description 4
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 claims description 3
- 230000005587 bubbling Effects 0.000 claims description 3
- 239000003795 chemical substances by application Substances 0.000 claims description 3
- 239000000945 filler Substances 0.000 claims description 3
- 239000004519 grease Substances 0.000 claims description 3
- 239000002920 hazardous waste Substances 0.000 claims description 3
- 230000004044 response Effects 0.000 claims description 3
- 238000004064 recycling Methods 0.000 claims description 2
- 238000009835 boiling Methods 0.000 description 6
- 150000002894 organic compounds Chemical class 0.000 description 5
- 239000000243 solution Substances 0.000 description 4
- 239000012141 concentrate Substances 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 description 2
- 206010033799 Paralysis Diseases 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 244000005700 microbiome Species 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000000575 pesticide Substances 0.000 description 2
- 239000011550 stock solution Substances 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 238000010170 biological method Methods 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 238000004043 dyeing Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000010842 industrial wastewater Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000010413 mother solution Substances 0.000 description 1
- 239000005416 organic matter Substances 0.000 description 1
- 238000006385 ozonation reaction Methods 0.000 description 1
- 238000007639 printing Methods 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 230000001988 toxicity Effects 0.000 description 1
- 231100000419 toxicity Toxicity 0.000 description 1
- 238000004065 wastewater treatment Methods 0.000 description 1
Classifications
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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
-
- 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
-
- 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
-
- 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
- C02F1/048—Purification of waste water by evaporation
-
- 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
- C02F1/24—Treatment of water, waste water, or sewage by flotation
-
- 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
- C02F1/30—Treatment of water, waste water, or sewage by irradiation
- C02F1/32—Treatment of water, waste water, or sewage by irradiation with ultraviolet light
-
- 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
- C02F1/40—Devices for separating or removing fatty or oily substances or similar floating material
-
- 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
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/722—Oxidation by peroxides
-
- 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
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/725—Treatment of water, waste water, or sewage by oxidation by catalytic oxidation
-
- 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
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/78—Treatment of water, waste water, or sewage by oxidation with ozone
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/08—Chemical Oxygen Demand [COD]; Biological Oxygen Demand [BOD]
-
- 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
- C02F2301/04—Flow arrangements
- C02F2301/046—Recirculation with an external loop
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Materials Engineering (AREA)
- Inorganic Chemistry (AREA)
- Treatment Of Water By Oxidation Or Reduction (AREA)
- Heat Treatment Of Water, Waste Water Or Sewage (AREA)
Abstract
The invention provides the evaporative crystallization new technology of a kind of high salt high concentrated organic wastewater, mainly comprise the steps that high salt high concentrated organic wastewater is carried out oil removing by (1), reduce the COD in waste water；(2) waste water after processing, by high efficiency particulate air filter, enters evaporated crystallization device after removing float；(3) evaporated crystallization device can produce two strands of waste water, and one is evaporation condensate, directly carries out biochemical treatment；One is evaporative crystallization dope, carries out solid-liquid separation；(4) carry out processing or refining by the NaCl crystal that solid-liquid separation produces；(5) dope of higher concentration solid-liquid separation produced carries out catalytic oxidation treatment；(6) dope after step (5) being processed is back to wastewater collection pond, is again introduced into evaporated crystallization device after mix homogeneously.In the present invention, evaporated crystallization device will not produce impact because of the problem of evaporation dope, and technological process is simple, and equipment is simple to operate, can realize the continuous operation of whole technique.
Description
Technical field
The present invention relates to the reuse technology method in Industrial Wastewater Treatment reuse technology field, particularly high salt high-COD waste water,
Belong to environment-friendly treating process field.
Background technology
High salt high concentrated organic wastewater is the waste water that the industries such as pesticide, medicine, printing and dyeing produce, and this waste water has difficult fall
The feature that solution, toxicity are high, pollution level is high.The waste water of this type cannot be used for biological method and processes, and can make microorganism
Becoming great impact, cause microorganism mortality, treatment effect is the best；The waste water of the type is also not suitable for using chemical oxidation
Technical finesse, because containing substantial amounts of salinity in waste water, it can cut down the oxidation effectiveness of oxidant significantly, causes processing cost high
And poor effect.
Therefore, for the waste water of high salt high-enriched organics, the technology used now is evaporative crystallization technique, by high salinity
Organic wastewater concentrate, evaporation dope in can separate out NaCl crystal, evaporation condensate salt content is relatively low, organic concentration relatively
Height, is suitable for the process using biochemical processing method to carry out next step.Concrete technology flow process is as shown in Figure 1.
In existing process technique, evaporation condensate carries out biochemical treatment, containing some in evaporative crystallization mother solution
NaCl crystal and part evaporation dope, after solid-liquid separation, NaCl crystal becomes a kind of side-product salt, evaporation dope backflow
To original wastewater collection pond, it is circulated and again evaporates.But, existing technique two drawbacks the biggest of existence:
One is, Organic substance and the continuous enrichment of salinity.In evaporation dope, Organic substance is enriched the Organic substance more many times higher than stock solution
And salinity, during repeatedly circulating and evaporating, Organic substance and salt branch constantly accumulate, and cause and enter the useless of crystallizing evaporator
Water concentration can be more and more higher, and this can cause the effect of evaporative crystallization to reduce, and the viscosity of evaporation dope is increasing, its boiling point
Also can be more and more higher, eventually result in the paralysis of whole vapo(u)rization system.
Two are, evaporation equipment blocks.The concentration of solution organic concentration and salinity owing to entering crystallizing evaporator is got over
More to come, if long-term circulation, solution can become thickness, and solid-liquid is not readily separated, and understands in crystallizing evaporator internal bond, blocking,
Crystallizing evaporator is caused to be not normally functioning.
The two problem directly can cause that evaporation effect is the best, energy consumption becomes big, equipment damage is serious, comes for crystallization apparatus
Say it is two fatal problems.If it is desired to overcome the two problem, need to use reactor evaporation dope, reactor for treatment ability
Limited and costly, required is relatively costly, and enterprise is difficult to bear.
Summary of the invention
For the problem of existing existence, the invention discloses the evaporative crystallization new technology of kind of high salt high concentrated organic wastewater,
It can overcome the problem run in prior art, and it mainly comprises the steps that
(1) the high salt high concentrated organic wastewater that wastewater collection pond is collected is carried out oil removing, the oils Organic substance of high COD will be caused
Remove, reduce the COD in waste water and remove；
(2) float in waste water, by high efficiency particulate air filter, is removed, is entered evaporation afterwards by the waste water after step (1) being processed
Crystallization apparatus；
(3) in step (2), evaporated crystallization device can produce two strands of waste water, and one is evaporation condensate, its salinity, content of organics
Relatively low, directly carry out biochemical treatment；One is evaporative crystallization dope, and evaporative crystallization dope contains NaCl crystal and more high salt
Divide and organic dope, evaporative crystallization dope is carried out solid-liquid separation；
(4) carry out processing or refining as hazardous waste using the NaCl crystal that solid-liquid separation in step (3) produces；
(5) dope of higher concentration solid-liquid separation in step (3) produced carries out catalytic oxidation treatment, uses oxidant and urges
Agent is to evaporation dope；
(6) dope after step (5) being processed is back to existing wastewater collection pond, is again introduced into evaporative crystallization after mix homogeneously
Device, carries out the circulation of technique.
After catalytic oxidation treatment, it is organic that the Organic substance in evaporation dope is decomposed into low boiling by high boiling point organic compound
Thing, after the evaporation concentrate circulating after process to the vaporising device of front end, lower boiling Organic substance can be taken out of along with steam, enters into
In evaporation condensate, will not be enriched with in crystallizing evaporator, the most also because of Organic substance enrichment, equipment blocking, evaporation effect can occur
The best problem；
Preferably, the oil removing of step (1) is oil removal by air bubbling, can be removed by grease that is water insoluble and that be partially soluble in water.
Preferably, the evaporated crystallization device in step (2) is triple effect evaporation crystallizer or MBR crystallizing evaporator.
Preferably, the NaCl crystal in step (3) refines, and prepares for its recycling.
Preferably, in step (5) in catalytic oxidation technique, the oxidant of employing is H2O2And ozone, catalyst is uviol lamp
And catalytic filler, the response time is 0.5-4h.
The invention have the benefit that
1, the relevant issues of evaporation concentrate circulating evaporation are solved.If evaporative crystallization dope does not carry out catalytic oxidation treatment, directly
It is circulated evaporation, enrichment and the accumulation of organic concentration can be caused, cause the poor effect of crystallizing evaporator, energy consumption to strengthen,
Equipment blocks, and even results in the paralysis of whole crystallizer.After evaporation dope carries out catalytic oxidation treatment, high boiling point therein is had
Machine thing is converted into low-boiling-point organic compound, and when carrying out evaporative crystallization again, low-boiling-point organic compound can enter into along with steam condensation
In evaporation condensate, will not accumulate in crystallizing evaporator and be enriched with, therefore avoid problem produced by direct evaporation.
2, technological process is simple, can realize whole technique and run continuously.In whole set process, evaporated crystallization device will not be because of
Problem for evaporation dope produces impact, and technological process is simple, and equipment is simple to operate, can realize the continuous operation of whole technique.
Accompanying drawing explanation
Fig. 1, the process chart of prior art；
Fig. 2, the process chart of the present invention.
Detailed description of the invention
Below in conjunction with the accompanying drawings and detailed description of the invention, it is further elucidated with the present invention, it should be understood that following detailed description of the invention is only
For the present invention being described rather than limiting the scope of the present invention.
The evaporative crystallization new technology of a kind of high salt high concentrated organic wastewater, mainly comprises the steps that
(1) high salt high concentrated organic wastewater is carried out oil removing, the oils organic matter removal of high COD will be caused, reduce in waste water
COD removes；Oil removing is oil removal by air bubbling, can be removed by grease that is water insoluble and that be partially soluble in water；
(2) float in waste water, by high efficiency particulate air filter, is removed, is entered evaporation afterwards by the waste water after step (1) being processed
Crystallization apparatus, evaporated crystallization device is triple effect evaporation crystallizer or MBR crystallizing evaporator；
(3) in step (2), evaporated crystallization device can produce two strands of waste water, and one is evaporation condensate, its salinity, content of organics
Relatively low, directly carry out biochemical treatment；One is evaporative crystallization dope, and evaporative crystallization dope contains NaCl crystal and more high salt
Divide and organic dope, evaporative crystallization dope is carried out solid-liquid separation；
(4) carry out processing or refining as hazardous waste using the NaCl crystal that solid-liquid separation in step (3) produces；It is preferably essence
System；
(5) dope of higher concentration solid-liquid separation in step (3) produced carries out catalytic oxidation treatment, uses oxidant and urges
Agent is to evaporation dope；
(6) dope after step (5) being processed is back to existing wastewater collection pond, is again introduced into evaporative crystallization after mix homogeneously
Device, carries out the circulation of technique, and the oxidant of employing is H2O2And ozone, catalyst is uviol lamp and catalytic filler, the response time
For 0.5-4h.
Embodiment 1
Wastewater source, in the waste water of certain pesticide company chlopyrifos production technology, proceeds by from first evaporation, the initial number of waste water
Data according to this and after process are as shown in table 1.
By the data in table 1 it can be seen that stock solution is after crystallization, under in condensed fluid, salinity and organic concentration are notable
Fall, has reached the standard of direct biochemistry, and in evaporation dope, Organic substance and salinity are all in enrichment.Evaporation dope is being carried out heterogeneous urging
After changing oxidation processes, the pH of evaporation dope is not remarkably decreased, but after again evaporating, the COD in evaporation condensed water is notable
Increasing, this explanation is after catalytic oxidation treatment, and the high boiling point organic compound in evaporation dope changes for low-boiling-point organic compound, along with
Steam enters in evaporation condensate, will not be enriched with in re-evaporation crystallizer and accumulate, it is to avoid cause because evaporating in proper order
A series of problems being difficult to overcome, respond well.
In heterogeneous catalytic oxidation, the addition of hydrogen peroxide is the 1% of liquor capacity ratio, ozonation aerated 2h, and additional ultraviolet is urged
Change, solution adds activated-carbon catalyst.
Technological means disclosed in the present invention program is not limited only to the technological means disclosed in above-mentioned embodiment, also includes
The technical scheme being made up of above technical characteristic combination in any.It should be pointed out that, for those skilled in the art
For, under the premise without departing from the principles of the invention, it is also possible to make some improvements and modifications, these improvements and modifications are also considered as
Protection scope of the present invention.
Claims (7)
1. the evaporative crystallization new technology of a high salt high concentrated organic wastewater, it is characterised in that mainly comprise the steps that
(1) the high salt high concentrated organic wastewater that wastewater collection pond is collected is carried out oil removing, the oils Organic substance of high COD will be caused
Remove, reduce the COD in waste water；
(2) float in waste water, by high efficiency particulate air filter, is removed, is entered evaporation afterwards by the waste water after step (1) being processed
Crystallization apparatus；
(3) in step (2), evaporated crystallization device can produce two strands of waste water, and one is evaporation condensate, directly carries out biochemical treatment；
One is evaporative crystallization dope, and evaporative crystallization dope is containing NaCl crystal, salinity and organic dope, and evaporative crystallization is dense
Liquid carries out solid-liquid separation；
(4) carry out processing or refining as hazardous waste using the NaCl crystal that solid-liquid separation in step (3) produces；
(5) dope of higher concentration solid-liquid separation in step (3) produced carries out catalytic oxidation treatment, uses oxidant and urges
Agent processes evaporation dope；
(6) dope after step (5) being processed is back to wastewater collection pond, is again introduced into evaporated crystallization device after mix homogeneously,
Carry out the circulation of technique.
2. the evaporative crystallization new technology of high salt high concentrated organic wastewater as claimed in claim 1, it is characterised in that described step
(1) oil removing in is oil removal by air bubbling, can be removed by grease that is water insoluble and that be partially soluble in water.
3. the evaporative crystallization new technology of high salt high concentrated organic wastewater as claimed in claim 1, it is characterised in that described step
(2) evaporated crystallization device in is triple effect evaporation crystallizer or MBR crystallizing evaporator.
4. the evaporative crystallization new technology of high salt high concentrated organic wastewater as claimed in claim 1, it is characterised in that described step
(3) the NaCl crystal in refines, and prepares for its recycling.
5. the evaporative crystallization new technology of high salt high concentrated organic wastewater as claimed in claim 1, it is characterised in that described step
(5), in catalytic oxidation technique, the oxidant of employing is H2O2And ozone.
6. the evaporative crystallization new technology of high salt high concentrated organic wastewater as claimed in claim 1, it is characterised in that described step
(5), in catalytic oxidation technique, the catalyst of employing is uviol lamp and catalytic filler.
7. the evaporative crystallization new technology of high salt high concentrated organic wastewater as claimed in claim 1, it is characterised in that described step
(5), in catalytic oxidation technique, the response time is 0.5-4h.
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107298494A (en) * | 2017-07-04 | 2017-10-27 | 聊城鲁西聚碳酸酯有限公司 | A kind of system and method for handling the waste water produced in makrolon technique |
| CN107601747A (en) * | 2017-11-07 | 2018-01-19 | 哈尔滨工程大学 | A kind of crystallizing evaporator of oil removing containing salt oil-containing wastewater |
| CN108218146A (en) * | 2018-03-19 | 2018-06-29 | 苏州依斯倍环保装备科技有限公司 | A kind for the treatment of process and processing system of rubber chemicals class high concentrated organic wastewater |
| CN108264063A (en) * | 2018-01-13 | 2018-07-10 | 安徽金禾实业股份有限公司 | A kind of method of sewage salt extraction in maltol production |
| CN108658389A (en) * | 2018-06-07 | 2018-10-16 | 戴安娜 | A kind of processing method of high-sulfate waste water |
| CN109896683A (en) * | 2019-03-26 | 2019-06-18 | 江苏春江润田农化有限公司 | The cycling and reutilization treatment process of time acid producing waste water |
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| CN110282806A (en) * | 2019-07-26 | 2019-09-27 | 西南石油大学 | A kind of magnetic transition metal particle activation persulfate wastewater processing technology |
| CN110981047A (en) * | 2019-11-08 | 2020-04-10 | 东莞道汇环保科技股份有限公司 | Treatment process of oily sewage of ship |
| CN111777256A (en) * | 2020-08-04 | 2020-10-16 | 河南顺圆水处理技术有限公司 | Treatment device and method for recycling high-temperature high-salinity wastewater |
| CN113562909A (en) * | 2020-04-29 | 2021-10-29 | 中国石油化工股份有限公司 | Salt-containing wastewater treatment system and treatment method |
| CN113651484A (en) * | 2021-10-20 | 2021-11-16 | 国能龙源环保有限公司 | System and method for preparing saturated strong brine from coal chemical wastewater |
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