CN105884142A - Coal chemical industry waste water treatment process and device - Google Patents
Coal chemical industry waste water treatment process and device Download PDFInfo
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- CN105884142A CN105884142A CN201610412330.0A CN201610412330A CN105884142A CN 105884142 A CN105884142 A CN 105884142A CN 201610412330 A CN201610412330 A CN 201610412330A CN 105884142 A CN105884142 A CN 105884142A
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- membrane
- waste water
- coal chemical
- ceramic membrane
- clear liquid
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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
- C02F1/001—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
- C02F1/24—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
- C02F1/28—Treatment of water, waste water, or sewage by sorption
- C02F1/288—Treatment of water, waste water, or sewage by sorption using composite sorbents, e.g. coated, impregnated, multi-layered
-
- 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
-
- 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
-
- 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
-
- 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
-
- 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
-
- 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
- C02F3/28—Anaerobic digestion processes
-
- 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
Abstract
The invention provides a coal chemical industry waste water treatment process and device. The treatment process comprises the steps that pretreatment of impurity removal is conducted on coal chemical industry waste water through coarse filtration, obtained clear liquid is subjected to oil removing through nitrogen flotation and then subjected to dephenolizing, dephenolization waste water is subjected to biochemical treatment and sent to a ceramic membrane for filtration, and ceramic membrane clear liquid and ceramic membrane concentrated clear liquid are obtained; ceramic membrane clear liquid effluent is subjected to supercritical water oxidation and membrane treatment, the effluent is concentrated through a nanofiltration membrane, and the clear liquid is obtained. The treatment device comprises a pretreatment device, a floatation tank, an adsorption tower, an anaerobic tank, an aerobic tank, a ceramic membrane filter, a supercritical reactor, an MBR membrane bioreactor and a nanofiltration membrane filter which are connected in sequence. The treatment process is high in dephenolization efficiency, low in operating cost, significant in energy saving effect and good in effluent quality.
Description
Technical field
The invention belongs to technical field of sewage, be specifically related to a kind of coal chemical wastewater treating technique and device.
Background technology
The present stage energy general layout of China is " rich coal, few oil, deficency " situation, the use of coal in total energy ratio
Reaching more than 70%, this ratio is far above the coal service condition of the developed country such as American-European, Japanese.From energy resource structure stability
Upper research, the coal of China reserves per capita and world average level closest to, and oil, natural gas resource situation still with send out
Reaching country and have a bigger gap, therefore country is greatly developing Chemical Industry present stage.
Coal is as important fuel, and the coal consumption of the most about 50% is at Thermal Power Generation Industry, and this occupation mode efficiency is the lowest,
Waste substantial amounts of coal resources, and cause environmental pollution.Coal-fired a large amount of uses, it will affect the air matter of China
, there is large-scale haze weather in amount.According to the statistics made by the departments concerned, the directly burning of coal occupies the 70% of smoke discharge amount,
SO285% and NOX67%.Chemical Industry greatly develop the development that will drive clean coal technology, develop coal
New use pattern thus improve the service efficiency of coal, promote China economic Green Development.
Coal chemical industrial waste water mainly has following source: technique produces waste water, life and other organic wastewater, circulating sewage, change
Learn water station draining and other feature waste water.Coal chemical industrial waste water biodegradability is poor, and organic pollutant category is various, chemical composition
Sufficiently complex, pollution concentration is high, except containing phenolic compound, condensed-nuclei aromatics, carbazole, naphthalene, pyrroles, furan, biphenyl,
Poisonous and harmful substances and the hardly degraded organic substances such as oil, the most a lot of inorganic pollutions such as ammonia nitrogen and sulfide etc., waste water COD
Value and colourity are the highest, belong to the industrial wastewater that intractability is higher.
Pollutants in coal chemical industry wastewater kind is many, and concentration is high, and the waste water quality difference that different atures of coal and production technology produce is relatively big,
Such waste water is always the industrial wastewater that intractability is bigger.Along with the research of technique, emerge at multiple coal chemical industrial waste water
Reason technology.Owing to different workshop sections treatment technology is of a great variety, Coal Chemical Engineering Project does not has clear and definite standard on wastewater processing technology
With precedent reference, some projects waste water is caused to process and below standard.Therefore, to built Coal Chemical Engineering Project wastewater processing technology
Bottleneck be analyzed and process the technical optimization of project up to standard inquiring into debugging, to Coal Chemical Engineering Project in the future in waste water work
Great meaning is had in the selection of skill.
Summary of the invention
It is an object of the invention to overcome the deficiencies in the prior art to provide a kind of coal chemical wastewater treating technique and device, this process
Technique nitric efficiency is high, operating cost is low, energy-saving effect is notable, effluent quality is good.
A kind of coal chemical wastewater treating technique, comprises the following steps:
Step 1, carries out pretreatment remove impurity to coal chemical industrial waste water coarse filtration, obtains clear liquid；
Step 2, by clear liquid through nitrogen air flotation oil removal, obtains air supporting waste water；
Step 3, carries out phenol removal by air supporting waste water by mixed adsorbent, obtains dephenolize waste water；
Step 4, is passed through low-oxygen aeration pond by dephenolize waste water and carries out anaerobic treatment, obtain anaerobic effluent and precipitating sludge；
Step 5, is passed through anaerobic effluent hyperoxia Aeration tank and carries out biochemical treatment, obtain bio-chemical effluent and precipitating sludge；
Step 6, to aerobic biochemical water outlet ceramic membrane filter, obtains ceramic membrane clear liquid and ceramic membrane dope；
Step 7, carries out supercritical water oxidation by ceramic membrane clear liquid water outlet, obtains aoxidizing water outlet and precipitate；
Step 8, oxidation water outlet enters MBR membrane bioreactor and carries out film process, and water outlet obtains clear water after NF membrane concentrates；
Precipitating sludge in step 4 and step 5 is all back to low-oxygen aeration pond, and in step 6, ceramic membrane dope returns step 3
In carry out phenol removal.
Further, in step 1, coarse filtration is charcoal filter, sand filtration or multi-medium filtering.
Further, in step 3, mixed adsorbent refers to bentonite, the mixture of active carbon fibre peacekeeping macroporous adsorbent resin,
Bentonite, the mass ratio of active carbon fibre peacekeeping macroporous adsorbent resin are 3～8:2～9:1～15.
Further, in step 4 condition of anaerobic treatment be dissolved oxygen 0.4～0.8mg/L, sludge concentration 4000～5000mg/L,
Hydraulic retention 24～36h.
Further, in step 5 condition of hyperoxia Aeration tank be dissolved oxygen 3.0～4.0mg/L, sludge concentration 4500～
5500mg/L, hydraulic retention 24～36h.
Further, in step 6, the average pore size scope of ceramic membrane is 0.02～0.2 μm.
Further, in step 7, the condition of supercritical water oxidation is 600 DEG C, 23.4MPa, coefficient of oxidation 3.5.
Further, in step 8, the cycles of concentration of NF membrane is at 10～30 times, and operation pressure is 1.0～3.5Mpa.
A kind of coal chemical industrial waste water processing means, include be sequentially connected with pretreatment unit, flotation tank, adsorption tower, anaerobic pond,
Aerobic Pond, purpose ceramic-film filter, supercritical reaction device, MBR membrane bioreactor and nano-filtration membrane filter.
Further, described pretreatment unit is charcoal filter device, sand filtering device or multi-medium filtering device；Ceramic membrane filter
The material of the ceramic membrane in device is aluminium oxide, zirconium oxide or titanium oxide；The average pore size scope of ceramic membrane is 0.02～0.2 μm；
NF membrane material in nano-filtration membrane filter can be organic, it is also possible to is inorganic.
The process technique nitric efficiency of the present invention is high, operating cost is low, energy-saving effect is notable, effluent quality is good.
Accompanying drawing explanation
Fig. 1 is the installation drawing that embodiment 1 uses；
Wherein, 1 be pretreatment unit, 2 for flotation tank, 3 for adsorption tower, 4 for anaerobic pond, 5 for Aerobic Pond, 6 for pottery
Film filter, 7 be supercritical reaction device, 8 be MBR membrane bioreactor, 9 for nano-filtration membrane filter.
Detailed description of the invention
Embodiment 1
Coal chemical industrial waste water is pumped into sand filtering device, and the removal carrying out granular solids is filtered, and gained clear liquid is through nitrogen air flotation oil removal.
Oil removing waste water is through bentonite, the mixture dephenolize of active carbon fibre peacekeeping macroporous adsorbent resin, and bentonite, active carbon fibre peacekeeping are big
The mass ratio of macroporous adsorbent resin is 3:2:1.Waste water after dephenolize sequentially passes through low-oxygen aeration pond and hyperoxia Aeration tank, at anaerobism
The condition of reason is dissolved oxygen 0.4mg/L, sludge concentration 4000mg/L, hydraulic retention 24h, and the condition of hyperoxia Aeration tank is for dissolving
Oxygen 3.0mg/L, sludge concentration 4500mg/L, hydraulic retention 24h.Distillation water outlet is pumped in ceramic membrane equipment and carry out float
Removal filter, ceramic membrane average pore size scope is 0.02 μm, and controlling at pressure is 0.2MPa, and crossflow velocity is 3m/s,
Temperature room temperature, the material of ceramic membrane is zirconium oxide, and average pore size is 0.2 μm.Ceramic membrane clear liquid carry out supercritical water oxidation,
After MBR Membrane Bioreactor for Wastewater Treatment, it is concentrated to give clear water through NF membrane.The condition of supercritical water oxidation is 600 DEG C,
23.4MPa, coefficient of oxidation 3.5；The cycles of concentration of NF membrane is at 10 times, and operation pressure is 3.5Mpa.
Through the present embodiment waste water quality before treatment it is: CODCr375mg/L, ammonia nitrogen 186mg/L, total nitrogen 213mg/L, SS
136mg/L。
Waste water quality after the present embodiment processes is: CODCr34mg/L, ammonia 0.26mg/L, total nitrogen 3.6mg/L, SS examine
Do not go out.
Embodiment 2
Coal chemical industrial waste water is pumped into sand filtering device, and the removal carrying out granular solids is filtered, and gained clear liquid is through nitrogen air flotation oil removal.
Oil removing waste water is through bentonite, the mixture dephenolize of active carbon fibre peacekeeping macroporous adsorbent resin, and bentonite, active carbon fibre peacekeeping are big
The mass ratio of macroporous adsorbent resin is 4:5:7.Waste water after dephenolize sequentially passes through low-oxygen aeration pond and hyperoxia Aeration tank, at anaerobism
The condition of reason is dissolved oxygen 0.6mg/L, sludge concentration 4500mg/L, hydraulic retention 30h, and the condition of hyperoxia Aeration tank is for dissolving
Oxygen 3.5mg/L, sludge concentration 4800mg/L, hydraulic retention 28h.Distillation water outlet is pumped in ceramic membrane equipment and carry out float
Removal filter, ceramic membrane average pore size scope is 0.08 μm, and controlling at pressure is 0.2MPa, and crossflow velocity is 3m/s,
Temperature room temperature, the material of ceramic membrane is zirconium oxide, and average pore size is 0.2 μm.Ceramic membrane clear liquid carry out supercritical water oxidation,
After MBR Membrane Bioreactor for Wastewater Treatment, it is concentrated to give clear water through NF membrane.The condition of supercritical water oxidation is 600 DEG C,
23.4MPa, coefficient of oxidation 3.5；The cycles of concentration of NF membrane is at 15 times, and operation pressure is 2.5Mpa.
Through the present embodiment waste water quality before treatment it is: CODCr405mg/L, ammonia nitrogen 195mg/L, total nitrogen 207mg/L, SS
142mg/L。
Waste water quality after the present embodiment processes is: CODCr41mg/L, ammonia 0.38mg/L, total nitrogen 3.2mg/L, SS examine
Do not go out.
Embodiment 3
Coal chemical industrial waste water is pumped into sand filtering device, and the removal carrying out granular solids is filtered, and gained clear liquid is through nitrogen air flotation oil removal.
Oil removing waste water is through bentonite, the mixture dephenolize of active carbon fibre peacekeeping macroporous adsorbent resin, and bentonite, active carbon fibre peacekeeping are big
The mass ratio of macroporous adsorbent resin is 8:9:15.Waste water after dephenolize sequentially passes through low-oxygen aeration pond and hyperoxia Aeration tank, anaerobism
The condition processed is dissolved oxygen 0.8mg/L, sludge concentration 5000mg/L, hydraulic retention 36h, and the condition of hyperoxia Aeration tank is molten
Solve oxygen 4.0mg/L, sludge concentration 5500mg/L, hydraulic retention 36h.Distillation water outlet is pumped in ceramic membrane equipment and suspends
The removal of thing is filtered, and it is 0.2MPa that ceramic membrane controls at pressure, and crossflow velocity is 3m/s, temperature room temperature, the material of ceramic membrane
Being zirconium oxide, average pore size is 0.2 μm.After ceramic membrane clear liquid carries out supercritical water oxidation, MBR Membrane Bioreactor for Wastewater Treatment,
It is concentrated to give clear water through NF membrane.The condition of supercritical water oxidation is 600 DEG C, 23.4MPa, coefficient of oxidation 3.5；NF membrane
Cycles of concentration at 15 times, operation pressure is 2.0Mpa.
Through the present embodiment waste water quality before treatment it is: CODCr405mg/L, ammonia nitrogen 172mg/L, total nitrogen 201mg/L, SS
107mg/L。
Waste water quality after the present embodiment processes is: CODCr39mg/L, ammonia 0.35mg/L, total nitrogen 4.2mg/L, SS examine
Do not go out.
Claims (10)
1. a coal chemical wastewater treating technique, it is characterised in that: comprise the following steps:
Step 1, carries out pretreatment remove impurity to coal chemical industrial waste water coarse filtration, obtains clear liquid；
Step 2, by clear liquid through nitrogen air flotation oil removal, obtains air supporting waste water；
Step 3, carries out phenol removal by air supporting waste water by mixed adsorbent, obtains dephenolize waste water；
Step 4, is passed through low-oxygen aeration pond by dephenolize waste water and carries out anaerobic treatment, obtain anaerobic effluent and precipitating sludge；
Step 5, is passed through anaerobic effluent hyperoxia Aeration tank and carries out biochemical treatment, obtain bio-chemical effluent and precipitating sludge；
Step 6, to aerobic biochemical water outlet ceramic membrane filter, obtains ceramic membrane clear liquid and ceramic membrane dope；
Step 7, carries out supercritical water oxidation by ceramic membrane clear liquid water outlet, obtains aoxidizing water outlet and precipitate；
Step 8, oxidation water outlet enters MBR membrane bioreactor and carries out film process, and water outlet obtains clear water after NF membrane concentrates；
Precipitating sludge in step 4 and step 5 is all back to low-oxygen aeration pond, and in step 6, ceramic membrane dope returns step 3
In carry out phenol removal.
Coal chemical wastewater treating technique the most according to claim 1, it is characterised in that: in step 1 coarse filtration be charcoal filter,
Sand filtration or multi-medium filtering.
Coal chemical wastewater treating technique the most according to claim 1, it is characterised in that: in step 3, mixed adsorbent is
Refer to bentonite, the mixture of active carbon fibre peacekeeping macroporous adsorbent resin, bentonite, active carbon fibre peacekeeping macroporous adsorbent resin
Mass ratio is 3～8:2～9:1～15.
Coal chemical wastewater treating technique the most according to claim 1, it is characterised in that: the bar of anaerobic treatment in step 4
Part is dissolved oxygen 0.4～0.8mg/L, sludge concentration 4000～5000mg/L, hydraulic retention 24～36h.
Coal chemical wastewater treating technique the most according to claim 1, it is characterised in that: hyperoxia Aeration tank in step 5
Condition is dissolved oxygen 3.0～4.0mg/L, sludge concentration 4500～5500mg/L, hydraulic retention 24～36h.
Coal chemical wastewater treating technique the most according to claim 1, it is characterised in that: in step 6, ceramic membrane is average
Pore diameter range is 0.02～0.2 μm.
Coal chemical wastewater treating technique the most according to claim 1, it is characterised in that: supercritical water oxidation in step 7
Condition be 600 DEG C, 23.4MPa, coefficient of oxidation 3.5.
Coal chemical wastewater treating technique the most according to claim 1, it is characterised in that: the concentration of NF membrane in step 8
Multiple is at 10～30 times, and operation pressure is 1.0～3.5Mpa.
9. a coal chemical industrial waste water processing means, it is characterised in that: include be sequentially connected with pretreatment unit, flotation tank,
Adsorption tower, anaerobic pond, Aerobic Pond, purpose ceramic-film filter, supercritical reaction device, MBR membrane bioreactor and NF membrane mistake
Filter.
Coal chemical industrial waste water processing means the most according to claim 1, it is characterised in that: described pretreatment unit is charcoal
Filter device, sand filtering device or multi-medium filtering device；The material of the ceramic membrane in purpose ceramic-film filter is aluminium oxide, zirconium oxide
Or titanium oxide；The average pore size scope of ceramic membrane is 0.02～0.2 μm；NF membrane material in nano-filtration membrane filter can be
Organically, it is also possible to be inorganic.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610412330.0A CN105884142A (en) | 2016-06-13 | 2016-06-13 | Coal chemical industry waste water treatment process and device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610412330.0A CN105884142A (en) | 2016-06-13 | 2016-06-13 | Coal chemical industry waste water treatment process and device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105884142A true CN105884142A (en) | 2016-08-24 |
Family
ID=56730328
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610412330.0A Withdrawn CN105884142A (en) | 2016-06-13 | 2016-06-13 | Coal chemical industry waste water treatment process and device |
Country Status (1)
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| CN (1) | CN105884142A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106221811A (en) * | 2016-08-31 | 2016-12-14 | 重庆赛迪热工环保工程技术有限公司 | The zero-discharge treatment system of supercritical water gasification method associating Biochemical method high-concentration hardly-degradable organic hazardous garbage and method |
| CN109250861A (en) * | 2018-08-27 | 2019-01-22 | 桂林桂特板业有限公司 | A kind of calcium silicate board sewage water treatment method |
| CN115367839A (en) * | 2022-07-14 | 2022-11-22 | 中节能工程技术研究院有限公司 | Anaerobic digestion liquid treatment device |
-
2016
- 2016-06-13 CN CN201610412330.0A patent/CN105884142A/en not_active Withdrawn
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106221811A (en) * | 2016-08-31 | 2016-12-14 | 重庆赛迪热工环保工程技术有限公司 | The zero-discharge treatment system of supercritical water gasification method associating Biochemical method high-concentration hardly-degradable organic hazardous garbage and method |
| CN109250861A (en) * | 2018-08-27 | 2019-01-22 | 桂林桂特板业有限公司 | A kind of calcium silicate board sewage water treatment method |
| CN115367839A (en) * | 2022-07-14 | 2022-11-22 | 中节能工程技术研究院有限公司 | Anaerobic digestion liquid treatment device |
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Application publication date: 20160824 |