CN106587487A - Treatment method of coal chemical industry waste water - Google Patents
Treatment method of coal chemical industry waste water Download PDFInfo
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- CN106587487A CN106587487A CN201611076773.3A CN201611076773A CN106587487A CN 106587487 A CN106587487 A CN 106587487A CN 201611076773 A CN201611076773 A CN 201611076773A CN 106587487 A CN106587487 A CN 106587487A
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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
- 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
- C02F1/26—Treatment of water, waste water, or sewage by extraction
-
- 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
- C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
-
- 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
- C02F2101/32—Hydrocarbons, e.g. oil
-
- 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
- C02F2101/34—Organic compounds containing oxygen
- C02F2101/345—Phenols
-
- 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
-
- 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
- C02F2209/02—Temperature
-
- 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
- C02F2209/06—Controlling or monitoring parameters in water treatment pH
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/02—Aerobic processes
- C02F3/12—Activated sludge processes
- C02F3/1236—Particular type of activated sludge installations
- C02F3/1263—Sequencing batch reactors [SBR]
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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
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/10—Biological treatment of water, waste water, or sewage
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- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Physical Water Treatments (AREA)
Abstract
The invention discloses a treatment method of coal chemical industry waste water, which includes the following steps: 1) dividing waste water into direct-flow cooling spray waste water, tar distillation waste water and other-sourced comprehensive waste water; 2) removing oil and suspensions from the direct-flow cooling spray waste water, feeding 80-99% of the direct-flow cooling spray waste water into an air cooling column to cool the waste water which is then circulated as cooling spray waste water, while the rest of the direct-flow cooling spray waste water serves as direct-flow cooling spray sewage water, that is then mixed with the tar distillation waste water, which has been subjected to oil water separation, for treatment; 3) performing deep deoiling and dephenolization to the mixed water obtained in the step 2) to recover the oil and volatile phenol in the mixed water, and feeding the processed discharging water into a comprehensive oil containing sewage treatment system. The treatment method is high in treatment rate on the coal chemical industry waste water, wherein soluble oil removal rate reaches 87.08-92.81% and dephenolization rate reaches 96.94-98.21%. The method has significant effects.
Description
Technical field
The present invention relates to a kind of chemical industry processing method, specifically a kind of coal chemical industry wastewater treating method.
Background technology
Coal coking device is that, with coal as raw material, pyrogenetic reaction occurs in high-temperature dry distillation furnace or low-temperature vaporization stove and generates coke
(or semicoke), burnt oil and gas, then by process production coke (or semicoke) such as cooling, electric fishing, separation, washing, purifying, refined,
Purification coal gas, the production process of chemical products.Coal coking device produces a large amount of pollutant height, the waste water of difficult for biological degradation.At present
Mixed processing mode is adopted both at home and abroad to coking of coal waste water mainly, the processing method for being adopted is with bioanalysises-physico-chemical process combination work
Based on skill, the composite waste that such as coking plant is produced is using " oil removing pretreatment-hydrolysis acidification-anoxia biochemistry-aerobic biochemical-connects
The methods such as tactile oxidation-coagulation filtration-activated carbon adsorption " are processed.Due to coking chemical waste water pollution components complexity, concentration height, contain
A large amount of difficult for biological degradation Organic substances, colourity are high, stink is big, cause the coal chemical enterprise of China more than 90% to there is wastewater treatment
Problem, embodying a concentrated expression of process water outlet COD, to be unable to stably reaching standard, volatile phenol and ammonia nitrogen concentration universal exceeded etc..And at the same time,
With the deficiency of water resource, the inevitable requirement of waste water treating and reutilizing cost industrial production.
The content of the invention
It is an object of the invention to provide a kind of coal chemical industry wastewater treating method, to solve what is proposed in above-mentioned background technology
Problem.
For achieving the above object, the present invention provides following technical scheme：
Waste water is divided into direct cooling spent shower water by a kind of coal chemical industry wastewater treating method, and tar distillation waste water comes with other
The comprehensive wastewater in source；Jing after oil removing oil removal, 80%～99% delivers to air cooling tower cooling Posterior circle to direct cooling spent shower water
Chilling spray water is used as, remainder is mixed with the tar distillation waste water through oil-water separation as direct cooling spray sewer
Processed；The mixing water that sewer is sprayed through tar distillation waste water and the direct cooling of oil-water separation carry out depth oil removing and
Phenol removal, reclaims the sump oil and volatile phenol in composite waste, and comprehensive oil-containing sewage treatment system is sent in the water outlet after process；Its
The comprehensive oil-containing sewage treatment system that it originates is processed including the biochemical processing method including intermittent activated sludge process, comprehensive
Close waste water and enter regulation tank, according to the pH value and temperature that need regulation waste water of oil removing dephenolize；Waste water through pretreatment is sent
Enter in mixing arrangement, plus extractant stirring, clarification, extraction phase and water phase are isolated, the water after oil removing dephenolize mutually send subsequent treatment
Workshop section；Extraction phase Jing after extraction oil removing dephenolize is reclaimed into retracting device.
As further scheme of the invention：The extractant that the oil removing dephenolize is used is hexamethylene, and the waste water locates in advance
In reason step, the pH value and temperature for adjusting waste water can be：PH≤5.0, water temperature are 8 ~ 35 DEG C.
As further scheme of the invention：The mixing arrangement is extraction tower, and the extraction oil removing dephenolize step is concrete
For：To send at the top of extraction equipment through the waste water of pretreatment, and the extractant counter-current extraction entered from bottom, extractant with it is useless
The volume ratio of water is 1:2~1:10, the number of plates is 5 ~ 15,0.2 ~ 0.5MPa of tower top pressure, temperature≤55 DEG C；Tower bottom pressure is 0.7
~ 1.0MPa, column bottom temperature≤50 DEG C, extraction phase is from overhead extraction；Water after extraction oil removing dephenolize is produced from bottom of towe, after being sent to
It is continuous to process workshop section.
As further scheme of the invention：Tar distillation waste water sends into the closed-type high-efficiency profit equipped with coalescence material point
Oil-water separation is carried out from device；Water outlet after separation mixes the molten gas gas of feeding with the sewer that water treatment system is sprayed from direct cooling
Floating machine depth oil removing；The float in fiber bundle filter removing waste water is sent in water outlet after oil removing；Water outlet enters macroporous resin
Phenol absorbing unit reclaims crude phenols, and the SBR biochemistry cell processings in comprehensive oil-contained waste water treatment system are sent in the water outlet after process.
As further scheme of the invention：The retracting device be extractant recovery tower, extractant recycling step tool
Body is：Extraction phase Jing after extraction oil removing dephenolize enters extractant recovery tower and reclaims extractant, extractant recovery tower tower top pressure
For 0.2 ~ 0.5MPa, 80 ~ 120 DEG C of tower top temperature, 0.5 ~ 0.6MPa of tower bottom pressure, 90 ~ 180 DEG C of column bottom temperature, tower top is extracted
Agent is taken, the recycling of extractant tank is delivered to；Bottom of towe Produced Liquid send segregation apparatuss to obtain oil and/or sodium phenolate after separating.
Compared with prior art, the invention has the beneficial effects as follows：Coal chemical industrial waste water handling rate of the present invention is high, and soluble oil is removed
Rate is gone to reach 87.08 ~ 92.81%, dephenolize rate reaches 96.94 ~ 98.21%, effect is significant.
Specific embodiment
Below the technical scheme in the embodiment of the present invention is clearly and completely described.
In the embodiment of the present invention, waste water is divided into direct cooling spent shower water by a kind of coal chemical industry wastewater treating method, burnt
Oil distillation waste water and the comprehensive wastewater in other sources；Jing after oil removing oil removal, 80%～99% send direct cooling spent shower water
Chilling spray water is used as to air cooling tower cooling Posterior circle, remainder is as direct cooling spray sewer and through oil-water separation
Tar distillation waste water mixing processed；Sewer mixed is sprayed with direct cooling through the tar distillation waste water of oil-water separation
Heshui carries out depth oil removing and phenol removal, reclaims sump oil and volatile phenol in composite waste, and the water outlet after process is sent into comprehensive
Oil-containing sewage treatment system；The comprehensive oil-containing sewage treatment system in other sources is including the biochemistry including intermittent activated sludge process
Processing method is processed, and comprehensive wastewater is entered and adjusts tank, according to the pH value and temperature that need regulation waste water of oil removing dephenolize；Will
Send in mixing arrangement through the waste water of pretreatment, plus extractant stirring, clarification, isolate extraction phase and water phase, oil removing dephenolize
Shui Xiangsong subsequent treatment workshop section afterwards；Extraction phase Jing after extraction oil removing dephenolize is reclaimed into retracting device.The oil removing
The extractant that dephenolize is used is hexamethylene, and in the Wastewater Pretreatment step, the pH value and temperature for adjusting waste water can be：pH≤
5.0, water temperature is 8 ~ 35 DEG C.The mixing arrangement is extraction tower, and the extraction oil removing dephenolize step is specially：Will be through pretreatment
Waste water send at the top of extraction equipment, and the extractant counter-current extraction entered from bottom, extractant are 1 with the volume ratio of waste water:2
~1:10, the number of plates is 5 ~ 15,0.2 ~ 0.5MPa of tower top pressure, temperature≤55 DEG C；Tower bottom pressure be 0.7 ~ 1.0MPa, bottom of towe temperature
≤ 50 DEG C of degree, extraction phase is from overhead extraction；Water after extraction oil removing dephenolize is produced from bottom of towe, is sent to subsequent treatment workshop section.It is burnt
Oil distillation waste water sends into the closed-type high-efficiency oil water separator equipped with coalescence material carries out oil-water separation；After separation water outlet with from
Dissolved gas floatator depth oil removing is sent in the sewer mixing of direct cooling spray water treatment system；Fiber is sent in water outlet after oil removing
Float in beam filter device removing waste water；Water outlet enters macroporous resin phenol absorbing unit and reclaims crude phenols, and the water outlet after process is sent
Enter the SBR biochemistry cell processings in comprehensive oil-contained waste water treatment system.The retracting device be extractant recovery tower, extractant return
Receive step to be specially：Extraction phase Jing after extraction oil removing dephenolize enters extractant recovery tower and reclaims extractant, extractant recovery tower
Tower top pressure be 0.2 ~ 0.5MPa, 80 ~ 120 DEG C of tower top temperature, 0.5 ~ 0.6MPa of tower bottom pressure, 90 ~ 180 DEG C of column bottom temperature, tower
Top obtains extractant, delivers to the recycling of extractant tank；Bottom of towe Produced Liquid send segregation apparatuss to obtain oil and/or phenol sodium after separating
Salt.
Embodiment 1
Certain coal plant, coal chemical industrial waste water treating capacity are 75 ton hours, and wherein oil content is 1500mg/L, solvable in oil content
Property oil content be 570mg/L, step is as follows：Waste water is divided into into direct cooling spent shower water, tar distillation waste water comes with other
The comprehensive wastewater in source；Jing after oil removing oil removal, 85% delivers to air cooling tower cooling Posterior circle is used as cold to direct cooling spent shower water
But shower water, remainder is mixed with the tar distillation waste water through oil-water separation as direct cooling spray sewer to be located
Reason；The mixing water that sewer is sprayed with direct cooling through the tar distillation waste water of oil-water separation is carried out at depth oil removing and dephenolize
Reason, reclaims the sump oil and volatile phenol in composite waste, and comprehensive oil-containing sewage treatment system is sent in the water outlet after process；Other sources
Comprehensive oil-containing sewage treatment system processed including the biochemical processing method including intermittent activated sludge process, comprehensive wastewater
Into tank is adjusted, according to the pH value and temperature that need regulation waste water of oil removing dephenolize；Waste water through pretreatment is sent into into mixing
In device, plus extractant stirring, clarification, extraction phase and water phase are isolated, the Shui Xiangsong subsequent treatment workshop section after oil removing dephenolize；Jing
Extraction phase after extraction oil removing dephenolize is reclaimed into retracting device.The extractant that the oil removing dephenolize is used is hexamethylene,
In the Wastewater Pretreatment step, the pH value and temperature for adjusting waste water can be：PH=5.0, water temperature are 20 DEG C；Tower top is extracted
Agent is taken, the recycling of extractant tank is delivered to, the oily pans after bottom of towe Produced Liquid feeding extract knockout drum are used as recovery oil product.
Detection：In water after detection process, contained oil is essentially soluble oil, and soluble oil content is 50mg/L, therefore oil removing
Rate（Oil content rate of change before and after extraction）For 95.64%, soluble oil removal rate（Soluble oil changes of contents rate before and after extraction）For
91.43%, deoiling effect especially removes soluble oil and works well.
Embodiment 2
Certain coal plant, coal chemical industrial waste water treating capacity are 50 ton hours, and wherein oil content is 1200mg/L, solvable in oil content
Property oil content be 400mg/L, step is as follows：Waste water enters regulation tank acid adding first makes its pH 4.5, is cooled to by cooler
30℃；By the waste water through pretreatment through being pumped at the top of extraction tower, with the extractant entered from bottom（Hexamethylene）Carry out
Counter-current extraction, extractant are 1 with the volume ratio of waste water:5, the number of plates is 10, tower top pressure 0.2MPa, 30 DEG C of temperature, bottom of towe pressure
Power is 0.5MPa, 30 DEG C of temperature, and extraction phase is from overhead extraction；Water after extraction oil removing is produced from bottom of towe, is returned into stripper
Extractant is received, the water after process is sent to subsequent handling process；After extraction, extraction phase enters extractant recovery tower, extractant recovery tower
Tower top pressure is 0.3MPa, and tower top temperature is 90 DEG C, and tower bottom pressure is 0.7MPa, and column bottom temperature is 130 DEG C；Tower top is extracted
Agent, delivers to the recycling of extractant tank, and bottom of towe Produced Liquid obtains oil product after cooling；After extraction, water mutually enters stripper and reclaims extraction
Take agent.
Detection：In water after detection process, contained oil is essentially soluble oil, and soluble oil content is 35mg/L, therefore oil removing
Rate（Oil content rate of change before and after extraction）For 96.35%, soluble oil removal rate（Soluble oil changes of contents rate before and after extraction）For
90.63%, deoiling effect especially removes soluble oil and works well.
Embodiment 3：
Certain coal plant, coal chemical industrial waste water treating capacity are 60 ton hours, and wherein oil content is 1100mg/L, solvable in oil content
Property oil content be 480mg/L, step is as follows：Waste water enters regulation tank acid adding first makes its pH 4.8, is cooled to by cooler
280℃；By the waste water through pretreatment through being pumped at the top of extraction tower, with the extractant entered from bottom（Hexamethylene）Carry out
Counter-current extraction, extractant are 1 with the volume ratio of waste water:5, the number of plates is 10, tower top pressure 0.2MPa, 30 DEG C of temperature, bottom of towe pressure
Power is 0.5MPa, 30 DEG C of temperature, and extraction phase is from overhead extraction；Water after extraction oil removing is produced from bottom of towe, is returned into stripper
Extractant is received, the water after process is sent to subsequent handling process；After extraction, extraction phase enters extractant recovery tower, extractant recovery tower
Tower top pressure is 0.3MPa, and tower top temperature is 90 DEG C, and tower bottom pressure is 0.7MPa, and column bottom temperature is 130 DEG C；Tower top is extracted
Agent, delivers to the recycling of extractant tank, and bottom of towe Produced Liquid obtains oil product after cooling；After extraction, water mutually enters stripper and reclaims extraction
Take agent.
Detection：In water after detection process, contained oil is essentially soluble oil, and soluble oil content is 38mg/L, therefore oil removing
Rate（Oil content rate of change before and after extraction）For 95.86%, soluble oil removal rate（Soluble oil changes of contents rate before and after extraction）For
91.85%, deoiling effect especially removes soluble oil and works well.
In sum, coal chemical industrial waste water handling rate of the present invention is high, and soluble oil removal rate reaches 87.08 ~ 92.81%, takes off
Phenol rate reaches 96.94 ~ 98.21%, effect is significant.
It is obvious to a person skilled in the art that the invention is not restricted to the details of above-mentioned one exemplary embodiment, Er Qie
In the case of spirit or essential attributes without departing substantially from the present invention, the present invention can be realized in other specific forms.Therefore, no matter
From the point of view of which point, embodiment all should be regarded as exemplary, and be nonrestrictive, the scope of the present invention is by appended power
Profit is required rather than described above is limited, it is intended that all in the implication and scope of the equivalency of claim by falling
Change is included in the present invention.
Moreover, it will be appreciated that although this specification is been described by according to embodiment, not each embodiment is only wrapped
Containing an independent technical scheme, this narrating mode of description is only that those skilled in the art should for clarity
Using description as an entirety, the technical scheme in each embodiment can also Jing it is appropriately combined, form those skilled in the art
Understandable other embodiment.
Claims (5)
1. a kind of coal chemical industry wastewater treating method, it is characterised in that waste water is divided into into direct cooling spent shower water, tar distillation
Waste water and the comprehensive wastewater in other sources；Direct cooling spent shower water Jing after oil removing oil removal, 80%～99% deliver to it is air-cooled
Tower cooling Posterior circle is used as chilling spray water, and remainder is used as direct cooling spray sewer and the tar through oil-water separation
Distillation waste water mixing is processed；The mixing water that sewer is sprayed with direct cooling through the tar distillation waste water of oil-water separation enters
The oil removing of row depth and phenol removal, reclaim the sump oil and volatile phenol in composite waste, and the water outlet after process is sent into comprehensive containing greasy dirt
Water treatment system；The comprehensive oil-containing sewage treatment system in other sources is including the biochemical treatment side including intermittent activated sludge process
Method is processed, and comprehensive wastewater is entered and adjusts tank, according to the pH value and temperature that need regulation waste water of oil removing dephenolize；Will be through pre-
The waste water of process is sent in mixing arrangement, plus extractant stirring, clarification, isolates extraction phase and water phase, the water after oil removing dephenolize
Xiang Song subsequent treatment workshop section；Extraction phase Jing after extraction oil removing dephenolize is reclaimed into retracting device.
2. coal chemical industry wastewater treating method according to claim 1, it is characterised in that the extraction that the oil removing dephenolize is used
Agent is hexamethylene, and in the Wastewater Pretreatment step, the pH value and temperature for adjusting waste water can be：PH≤5.0, water temperature are 8 ~ 35
℃。
3. coal chemical industry wastewater treating method according to claim 1, it is characterised in that the mixing arrangement is extraction tower,
The extraction oil removing dephenolize step is specially：To send at the top of extraction equipment through the waste water of pretreatment, and enter from bottom
Extractant counter-current extraction, extractant are 1 with the volume ratio of waste water:2~1:10, the number of plates is 5 ~ 15, tower top pressure 0.2 ~
0.5MPa, temperature≤55 DEG C；Tower bottom pressure be 0.7 ~ 1.0MPa, column bottom temperature≤50 DEG C, extraction phase is from overhead extraction；Extraction is removed
Water after oily dephenolize is produced from bottom of towe, is sent to subsequent treatment workshop section.
4. coal chemical industry wastewater treating method according to claim 1, it is characterised in that tar distillation waste water is sent into equipped with poly-
The closed-type high-efficiency oil water separator of knot material carries out oil-water separation；After separation water outlet with from direct cooling shower water processing system
Dissolved gas floatator depth oil removing is sent in the sewer mixing of system；Water outlet after oil removing is sent in fiber bundle filter removing waste water
Float；Water outlet enters macroporous resin phenol absorbing unit and reclaims crude phenols, and comprehensive oiliness sewage treatment system is sent in the water outlet after process
SBR biochemistry cell processings in system.
5. coal chemical industry wastewater treating method according to claim 1, it is characterised in that the retracting device is that extractant is returned
Tower is received, extractant recycling step is specially：Extraction phase Jing after extraction oil removing dephenolize enters extractant recovery tower and reclaims extractant,
Extractant recovery tower tower top pressure be 0.2 ~ 0.5MPa, 80 ~ 120 DEG C of tower top temperature, 0.5 ~ 0.6MPa of tower bottom pressure, column bottom temperature
90 ~ 180 DEG C, tower top obtains extractant, delivers to the recycling of extractant tank；Bottom of towe Produced Liquid send segregation apparatuss to obtain oil after separating
And/or sodium phenolate.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201611076773.3A CN106587487A (en) | 2016-11-30 | 2016-11-30 | Treatment method of coal chemical industry waste water |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102311202A (en) * | 2010-07-07 | 2012-01-11 | 中国石油化工股份有限公司 | Comprehensive treatment method for wastewater of coal coking device |
| CN103964543A (en) * | 2014-05-06 | 2014-08-06 | 河南龙成煤高效技术应用有限公司 | Method for oil and phenol removal from wastewater in field of coal chemical industry |
-
2016
- 2016-11-30 CN CN201611076773.3A patent/CN106587487A/en not_active Withdrawn
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102311202A (en) * | 2010-07-07 | 2012-01-11 | 中国石油化工股份有限公司 | Comprehensive treatment method for wastewater of coal coking device |
| CN103964543A (en) * | 2014-05-06 | 2014-08-06 | 河南龙成煤高效技术应用有限公司 | Method for oil and phenol removal from wastewater in field of coal chemical industry |
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