CN102795729A - Device and method for treating COD through compound precipitation - Google Patents
Device and method for treating COD through compound precipitation Download PDFInfo
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- CN102795729A CN102795729A CN2012103300865A CN201210330086A CN102795729A CN 102795729 A CN102795729 A CN 102795729A CN 2012103300865 A CN2012103300865 A CN 2012103300865A CN 201210330086 A CN201210330086 A CN 201210330086A CN 102795729 A CN102795729 A CN 102795729A
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Abstract
The invention discloses a device and a method for treating COD through compound precipitation. According to the invention, an advanced oxidation reaction tank, an advanced oxidation precipitation tank and a compound precipitation device are combined to form three main body units in space; a water storage tank is arranged between the advanced oxidation precipitation tank and a flocculation reaction tank, wherein the compound precipitation device is composed of a flocculation reaction zone, a primary precipitation zone, an inclined-pipe precipitation zone and a sludge concentration zone all orderly arranged in space. Wastewater orderly flows into the advanced oxidation reaction tank, the advanced oxidation precipitation tank, the water storage tank, the flocculation reaction zone, the primary precipitation zone and the inclined-pipe precipitation zone; and therefore, the final outlet water is capable of meeting the standard and then can be discharged. The wastewater is subjected to advanced oxidation treatment of the device and the method provided by the invention and COD, SS and the like are further removed by using the compound precipitation device; besides, flocculation effect is enhanced through continuously circulating floccule sludge and various chemical agents; and therefore, the sedimentation performance of suspended matters in water can be improved and the national standard of water treatment can be met.
Description
Technical field
The invention belongs to environmental protection technical field, particularly relate to a kind of apparatus and method of utilizing composite precipitation to handle COD.
Background technology
Coal chemical industrial waste water is the waste water that in the former dry distillation of coal, gas purification and Chemicals treating process, produces; Not only quantity discharged is big; Wherein also contain a large amount of pollutents, and complicated component, the inorganics that wherein contains comprises a large amount of ammonium salts, thiocyanide, sulfide, prussiate etc.; Organism mainly is heterocycle macromole, difficult degradation compounds such as aromatics, phenols and verivate thereof and pyridine, quinoline, anthracene; Present domestic coal chemical industrial waste water adopts materialization or biochemistry to add the materialization treatment process basically, and single biochemical treatment can only be satisfied phenol, cyanogen, the requirement of ammonia nitrogen qualified discharge, and indexs such as COD, colourity, SS are difficult to reach " integrated wastewater discharge standard " first discharge standard requirement (GB8978-1996); And the materialization processing will add medicament; Produce a large amount of chemical sludges, common settling tank can't meet the demands, and water outlet SS is higher.Require and coal chemical industrial waste water processing present situation according to GB8978-1996, realize comprehensive qualified discharge of principal pollutant, the waste water after must handling materialization is carried out further and is handled.
At present, main active carbon adsorption, ozone oxidation method and the strong oxidizer oxidation style of adopting handled in the materialization of coal chemical industrial waste water both at home and abroad.Baosteel was once introduced its Coal Chemical Industry biochemical waste water of charcoal absorption method of reproduction advanced treatment of Japan; But price comparison costliness because of gac itself; The regeneration of activated carbon treating processes produces regenerated sewage, problem such as the regenerative operation difficulty is big, running cost height and cause device finally to be stopped using.External place of adopting the ozone oxidation method exists that current consumption is big, operation and investment cost be high, and misoperation is prone to problems such as biology on every side work the mischief.The strong oxidizer oxidation style also exists sludge output big, the problem that water outlet SS is higher.Some Coal Chemical Industry biochemical waste water advanced treatment novel methods of domestic-developed also respectively have its advantage and deficiency; Like of the processing of catalysis and supercritical water oxidation technology, though effect significantly exists equipment corrosion, reactor plugs, running cost to cross problems such as height to coal chemical industrial waste water; Microwave radiation-charcoal absorption advanced treatment coal chemical industrial waste water method, same because problems such as technology maturation property and running cost height realize that industriallization also has big difficulty.
Summary of the invention
First purpose of the present invention provides a kind of device that utilizes composite precipitation to handle COD, thereby improves the treatment effect of coal chemical industrial waste water.Another object of the present invention provides a kind of method of utilizing composite precipitation to handle COD, thereby improves the processing efficiency of coal chemical industrial waste water.
In order to realize first purpose; The technical scheme that is adopted is such: a kind of composite precipitation device; Be made up of reaction zone and settling region, it is characterized in that: reaction zone is made up of the flocculation reaction district, and the settling region is made up of first settling region, tube settling district, mud enrichment region; This four part is ordering successively spatially, constitutes the composite precipitation device.
Further, be provided with whipping appts in the flocculation reaction district of composite precipitation device.
Further, establish inclined tube filler, be the one-level inclined tube, divide into the inclined tube that inclination direction is opposite, filler is identical, be the secondary inclined tube at the one-level inclined tube with 50-70 ° of inclination angles in the tube settling district.
Further, be provided with mud position and sludge concentration monitoring device at the mud enrichment region of composite precipitation device, and be provided with sludge pump.
In order to realize second purpose, the technical scheme that is adopted is such: a kind of method of utilizing composite precipitation apparatus processes COD is characterized in that:
A, waste water, stir through whipping appts through adding the advanced oxidation agent from flowing into the advanced oxidation reaction tank;
B, step a water outlet get into the advanced oxidation settling tank, carry out mud-water separation, and the supernatant liquid after the separation is for further processing, and mud is delivered to sludge thickener;
C, step b supernatant liquid are delivered to the composite precipitation device, are introduced into the flocculation reaction district, and water inlet, flocculation reaction district adds flocculation agent, stir through whipping appts, carry out flocculation reaction;
D, step c water outlet get into settling region just, carry out mud-water separation; Supernatant liquid gets into the tube settling district, and water outlet qualified discharge, sludge part are back to the flocculation reaction district.
Further, the advanced oxidation agent that in the advanced oxidation reaction tank, adds is commercially available HL-9705A and HL-9705B.
Further, in the flocculation reaction district of composite precipitation device, the flocculation agent that water inlet, flocculation reaction district adds is commercially available HL-9706.
Further, add activated carbon or coke powder in the flocculation reaction district of composite precipitation device.
Further, between advanced oxidation settling tank and flocculation tank, increase a water reservoir.
Waste water is introduced into the advanced oxidation reaction tank, adds the advanced oxidation agent, and thorough mixing reaction back gets into the advanced oxidation settling tank under the whipping appts effect, mud-water separation under the current action of gravity, and mud enters sludge thickener, and supernatant liquid gets into the composite precipitation device.Get into the flocculation reaction district after adding the flocculation agent thorough mixing; Through coagulating agent suspended substance and colloidal solid in the water are taken off surely, the impurity particle that takes off after steady is wadding nuclear with the carrier, catches effect through bridge formation adsorption and little sand particulate strainer net of macromolecular chain; Generate the bigger alumen ustum of density fast; Under action of gravity, get into the tube settling district after the initial gross separation and further separate, improve the processing power of settling tank greatly, and successfully manage the HI high impact load.The mixed solution overflow gets into settling region just; Flco gets into the mud enrichment region through gravity separation; The waste water of initial gross separation is further held back residual flco through the tube settling district, and mud enrichment region part mud backflow flocculation reaction district strengthens flocculating effect, and the back standard discharge is collected in water outlet.And the mud enrichment region at the composite precipitation device is provided with mud position and sludge concentration monitoring device, can guarantee that the water outlet effect reduces current to sedimentary influence.
The present invention is that bio-chemical effluent is handled through advanced oxidation; Utilize the composite precipitation device further to remove COD and SS etc. simultaneously, thereby through using continuous round-robin flco mud and various chemical agent enhanced flocculation effect to improve the materialization treatment process of suspended substance sedimentation performance in the water.The gained water outlet can reach " integrated wastewater discharge standard " GB8978-1996 of country one-level and go out water quality standard, and especially COD and SS etc. are far superior to conventional treatment process.
Description of drawings
Fig. 1 is the process flow sheet of the specific embodiment of the invention.
Fig. 2 is a composite precipitation device of the present invention district block diagram.
Annotate: A among the figure: waste water, B: advanced oxidation agent HL-9705A, HL-9705B, C: flocculation agent HL-9706, D: water outlet
Embodiment
Present embodiment is the test run(s) that the present invention is done in certain waste water treatment engineering, and this test is blocking test, and nonspecific crowd can not contact, understand process of the test.
Referring to accompanying drawing.The present invention has spatially constituted three main unit with advanced oxidation reaction tank, advanced oxidation settling tank, composite precipitation device.A water reservoir is arranged between advanced oxidation settling tank and flocculation tank.Wherein the composite precipitation device spatially is arranged in order placement with flocculation reaction district 1, first settling region 2, tube settling district 3, mud enrichment region 4.Flocculation reaction district 1 at the composite precipitation device is provided with whipping appts 11.Establish inclined tube filler in tube settling district 3, be one-level inclined tube 31, divide into the inclined tube that inclination direction is opposite, filler is identical, be secondary inclined tube 32 at the one-level inclined tube with 50-70 ° of inclination angles.Mud enrichment region at composite precipitation device 4 is provided with mud position and sludge concentration monitoring device, and is provided with sludge pump.
Waste water flows into advanced oxidation reaction tank, advanced oxidation settling tank, water reservoir, flocculation reaction district, first settling region, tube settling district, final outflow water standard discharge successively; The practical implementation step is following:
A, with the biochemical waste water after the biochemical treatment of coalification factory as handling former water; Promote and after the under meter metering, get in the advanced oxidation reaction tank through the pump pressurization; Add advanced oxidation agent HL-9705A, HL-9705B, dosage is respectively 2000ppm, 700ppm, under the effect of whipping appts, mixes fully; The reaction of generation advanced oxidation, the stop certain hour makes and reacts completely;
B, step a water outlet get into the advanced oxidation settling tank, under action of gravity, carry out mud-water separation, and the supernatant liquid after the separation gets into water reservoir after collecting, and mud is delivered to sludge thickener and concentrated after mud scraper further compresses;
C,, water reservoir water water level opens lift pump when opening liquid level when reaching; Waste water is promoted to the composite precipitation device through the pump pressurization; The dosing coagulant HL-9706 in the flocculation reaction district; With the flocculation of mud enrichment region partial reflux mud thorough mixing, the water reservoir water level is reduced to when stopping liquid level under the stirrer effect, and lift pump cuts out; Treat that the water reservoir liquid level rises to repetition c step when opening liquid level;
D, step c water outlet flow automatically to just in the settling region, and flco constantly flocculates and forms alumen ustum and under action of gravity, separate with waste water.Supernatant liquid after the separation is further removed flco etc. through the tube settling district, and water outlet is collected laggard clean water basin standard discharge through water leg; After pump is partly refluxed to flocculation tank, deliver to sludge thickener and carry out the mud concentration by all the other mud through enrichment region for the mud of post precipitation.
Waste water is introduced into the advanced oxidation reaction tank; Add the advanced oxidation agent, thorough mixing reaction back gets into advanced oxidation settling tank, mud-water separation under the current action of gravity under the whipping appts effect; Mud enters sludge thickener, and supernatant liquid gets into water reservoir and is promoted to the composite precipitation device through pump again.Get into the flocculation reaction district after adding the flocculation agent thorough mixing; The mixed solution overflow gets into settling region just; Flco gets into the mud enrichment region through gravity separation; The waste water of initial gross separation is further held back residual flco through the tube settling district, and mud enrichment region part mud backflow flocculation reaction district strengthens flocculating effect, and the back standard discharge is collected in water outlet.
Step c water outlet gets into the composite precipitation device; Be introduced into flocculation tank; The thorough mixing of water inlet of realization system and flocculation agent under the stirrer effect, highly effective reaction is that collection mixes and plug-flow is the dynamic response of one on the waterpower fluidised form; Flco is in suspended state all the time in the maintenance flocculation tank, has prolonged the reaction times.The flocculation tank of mud enrichment region part mud backflow simultaneously further promotes throwing out.Through the use of complete assembly, the COD of system's final outflow water is stabilized in below 80 mg/L, clearance is higher than 70%, and effluent color dilution reaches 15～20 times.The system effluent index of explanation behind the composite precipitation device, especially COD and SS etc. are far superior to conventional treatment process, and water-quality guideline relatively sees the following form:
| The project factor | The present technique effluent index | Conventional effluent index |
| COD Cr | ≤80mg/L | ≤120mg/L |
| SS | ≤20mg/L | ≤70mg/L |
| Colourity | <=20 times | <=50 times |
After adopting the present invention, can coal chemical industrial waste water treat effluent colourity be controlled at below 20 times, COD is controlled at below the 100mg/L, reaches " integrated wastewater discharge standard " GB8978-1996 of country one-level and goes out water quality standard.Simultaneously, the present invention has realized automatic control, has reduced operation easier; The device combination is compact, saves floor space and one-time investment; Reduce the dosage of medicament, improved sedimentation effect greatly, reduced cost.
Claims (9)
1. composite precipitation device; Be made up of reaction zone and settling region, it is characterized in that: reaction zone is made up of the flocculation reaction district, and the settling region is made up of first settling region, tube settling district, mud enrichment region; This four part is ordering successively spatially, constitutes the composite precipitation device.
2. a kind of composite precipitation device according to claim 1, it is characterized in that: the district is provided with whipping appts in flocculation reaction.
3. a kind of composite precipitation device according to claim 1; It is characterized in that: establish inclined tube filler in the tube settling district with 50-70 ° of inclination angles; Be the one-level inclined tube, divide into the inclined tube that inclination direction is opposite, filler is identical, be the secondary inclined tube at the one-level inclined tube.
4. a kind of composite precipitation device according to claim 1 is characterized in that: be provided with mud position and sludge concentration monitoring device at the mud enrichment region, and be provided with sludge pump.
5. method of utilizing any described composite precipitation apparatus processes COD of claim 1-4 is characterized in that:
A, waste water through adding the advanced oxidation agent, utilize whipping appts to stir from flowing into the advanced oxidation reaction tank;
B, step a water outlet get into the advanced oxidation settling tank, carry out mud-water separation, and the supernatant liquid after the separation is for further processing, and mud is delivered to sludge thickener;
C, step b supernatant liquid are delivered to the composite precipitation device, are introduced into the flocculation reaction district, and water inlet, flocculation reaction district adds flocculation agent, stir through whipping appts, carry out flocculation reaction;
D, step c water outlet get into settling region just, carry out mud-water separation; Supernatant liquid gets into the tube settling district, and water outlet qualified discharge, sludge part are back to the flocculation reaction district.
6. a kind of method of utilizing composite precipitation apparatus processes COD according to claim 5 is characterized in that: the advanced oxidation agent that in the advanced oxidation reaction tank, adds is commercially available HL-9705A and HL-9705B.
7. a kind of method of utilizing composite precipitation apparatus processes COD according to claim 5 is characterized in that: in the flocculation reaction district of composite precipitation device, the flocculation agent that water inlet, flocculation reaction district adds is commercially available HL-9706.
8. a kind of method of utilizing composite precipitation apparatus processes COD according to claim 5 is characterized in that: the flocculation reaction district at the composite precipitation device adds activated carbon or coke powder.
9. a kind of method of utilizing composite precipitation apparatus processes COD according to claim 5 is characterized in that: between advanced oxidation settling tank and flocculation tank, increase a water reservoir.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2012103300865A CN102795729A (en) | 2012-09-10 | 2012-09-10 | Device and method for treating COD through compound precipitation |
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| CN2012103300865A CN102795729A (en) | 2012-09-10 | 2012-09-10 | Device and method for treating COD through compound precipitation |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103304097A (en) * | 2013-06-18 | 2013-09-18 | 中国海洋石油总公司 | Method for combined treatment of wastewater of phenol-containing gas by ozone flocculant |
| CN108383236A (en) * | 2018-03-30 | 2018-08-10 | 哈尔滨工业大学 | A method of microorganism flco is activated to improve cohesion and dephosphorization performance using ferrate |
| CN112174395A (en) * | 2020-11-13 | 2021-01-05 | 中冶京诚工程技术有限公司 | Multistage coagulating sedimentation device |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN2931458Y (en) * | 2006-06-28 | 2007-08-08 | 吴作成 | Highly effective physicochemical water treatment sedimentation basin |
| KR20100107887A (en) * | 2009-03-27 | 2010-10-06 | 부경대학교 산학협력단 | Auto-control method for sequencing batch reactor wastewater treatment process by using deltaorp |
| CN202297281U (en) * | 2011-10-31 | 2012-07-04 | 郑恒利 | Efficient sedimentation tank |
| CN102603091A (en) * | 2011-01-19 | 2012-07-25 | 苏州清荷坊环保科技有限公司 | Sewage treatment system |
-
2012
- 2012-09-10 CN CN2012103300865A patent/CN102795729A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2931458Y (en) * | 2006-06-28 | 2007-08-08 | 吴作成 | Highly effective physicochemical water treatment sedimentation basin |
| KR20100107887A (en) * | 2009-03-27 | 2010-10-06 | 부경대학교 산학협력단 | Auto-control method for sequencing batch reactor wastewater treatment process by using deltaorp |
| CN102603091A (en) * | 2011-01-19 | 2012-07-25 | 苏州清荷坊环保科技有限公司 | Sewage treatment system |
| CN202297281U (en) * | 2011-10-31 | 2012-07-04 | 郑恒利 | Efficient sedimentation tank |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103304097A (en) * | 2013-06-18 | 2013-09-18 | 中国海洋石油总公司 | Method for combined treatment of wastewater of phenol-containing gas by ozone flocculant |
| CN103304097B (en) * | 2013-06-18 | 2014-09-17 | 中国海洋石油总公司 | Method for combined treatment of wastewater of phenol-containing gas by ozone flocculant |
| CN108383236A (en) * | 2018-03-30 | 2018-08-10 | 哈尔滨工业大学 | A method of microorganism flco is activated to improve cohesion and dephosphorization performance using ferrate |
| CN112174395A (en) * | 2020-11-13 | 2021-01-05 | 中冶京诚工程技术有限公司 | Multistage coagulating sedimentation device |
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Application publication date: 20121128 |