CN201817356U - Coking wastewater advanced treatment and reuse device by using ozone, active carbon and double-membrane process - Google Patents

Coking wastewater advanced treatment and reuse device by using ozone, active carbon and double-membrane process Download PDF

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Publication number
CN201817356U
CN201817356U CN2010202310527U CN201020231052U CN201817356U CN 201817356 U CN201817356 U CN 201817356U CN 2010202310527 U CN2010202310527 U CN 2010202310527U CN 201020231052 U CN201020231052 U CN 201020231052U CN 201817356 U CN201817356 U CN 201817356U
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water
reverse osmosis
ozone
treatment
osmosis membrane
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CN2010202310527U
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Chinese (zh)
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吴静璇
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吴静璇
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Abstract

The utility model discloses a coking wastewater advanced treatment and reuse device by using ozone, active carbon and double-membrane process. The device is characterized by comprising a membrane bioreactor, an ozone contact tower, an active carbon filtering tower, a reverse osmosis membrane treatment system and a concentrated water evaporating crystallization system, wherein an outlet for the coking wastewater subjected to pretreatment and biochemical treatment is connected with the membrane bioreactor; the water outlet of the membrane bioreactor is connected with the ozone contact tower; the water outlet of the ozone contact tower is connected with the active carbon filtering tower; the water outlet of the active carbon filtering tower enables the effluent to be pressurized by serially connecting a reverse osmosis feed pump and a high-pressure pump, and then is connected with the reverse osmosis membrane treatment system; and one water outlet of the reverse osmosis membrane treatment system is connected with the concentrated water evaporating crystallization system, and another water outlet of the reverse osmosis membrane treatment system is connected with a reuse water tank. The device realizes water resource recycle and coking wastewater zero release, and has remarkable social benefit.

Description

The ozone of coking chemical waste water, gac and two embrane method advanced treatment and reclamation set
Technical field
The utility model relates to the technology for treating industrial waste water field, relates in particular to a kind of ozone, gac and two embrane method advanced treatment and reclamation set of coking chemical waste water.
Background technology
At present, Treatment of Coking Effluent generally adopts A/O biological denitrificaion treatment technology, handles back sewage quality index and can reach national specified discharge standard, and part is back to wet quenching, dedusting, coal gas water seal equal turbidity circulating water system and makes make up water.Advanced treatment to coking chemical waste water generally adopts means such as sand filtration, biological filter, coagulating treatment, although water outlet COD is controlled at about 100mg/L, suspension content can not satisfy and produce the requirement of water purification quality of water about 30mg/L; The employing activated carbon filtration that has can be removed COD and suspended substance in the water effectively, and COD is dropped to below the 60mg/L, and suspension content but does not almost have effect to deliquescent solid saltiness below 5mg/L, so this technology does not have promotional value.
In order to remove soluble solid, must adopt reverse osmosis membrane to separate, and the concentrated solution after separating is because of COD with salt is high can't discharge, unique place to go is to be sprayed onto coal yard or as the make up water of wet quenching, but the water of coal yard is limited, many coke-oven plants have changed dry quenching(of coke) into, so need a Treatment of Coking Effluent reuse and reach the technology of zero release.
The utility model content
Technical problem to be solved in the utility model provides a kind of ozone, gac and two embrane method advanced treatment and reclamation set of coking chemical waste water, this device can reduce all kinds of pollutant loads such as COD and suspended substance in the waste water significantly, with the coking wastewater deep treatment reuse to zero release.
Technical problem to be solved in the utility model is achieved through the following technical solutions:
A kind of ozone of coking chemical waste water, gac and two embrane method advanced treatment and reclamation set, comprise pretreatment system and biochemical treatment system, it is characterized in that: described device also comprise membrane bioreactor (MembraneBiology Reactor, MBR), ozone contact tower, active carbon filter tower, reverse osmosis membrane processing system and dense water evaporation and crystallization system;
Outlet through the coking chemical waste water after pre-treatment and the biochemical treatment is connected with described membrane bioreactor; The water outlet of described membrane bioreactor is connected with described ozone contact tower; The water outlet of described ozone contact tower is connected with described active carbon filter tower; The water outlet of described active carbon filter tower is connected water outlet after reverse osmosis feedwater pump and high-pressure pump series connection pressurization with described reverse osmosis membrane processing system; A water outlet of described reverse osmosis membrane processing system is connected with described dense water evaporation and crystallization system, and another outlet of described reverse osmosis membrane processing system is connected with the reuse water tank.
Described MBR membrane bioreactor is the thread film of tubular fibre, and the work period is 3 minutes, 30 seconds intermittently, required suction force is generally-0.01～-0.04MPa about, filtering accuracy 0.5 μ m, crossing water flux is 10～15L/m 2.hr.
Described reverse osmosis membrane processing adopts two cover systems, and described two cover systems are connected in series.
The described first cover reverse osmosis system operating pressure, 2～3.5MPa, filtering accuracy 0.001 μ m; The concentrated solution of the first cover reverse osmosis system enters the second cover reverse osmosis system, system works pressure 3.5～4.0Mpa, and final concentrated solution accounts for below 10% of the entire treatment water yield; Described concentrated solution water quality is: CODcr≤450mg/L, saltiness≤40000mg/L.
Described pretreatment system comprises grease removal tank, flotation cell, equalizing tank; Biochemical treatment system comprises anaerobic pond, anoxic pond, Aerobic Pond, reflux sedimentation tank.
Anaerobic pond has related parameter: hydraulic detention time 8～12h, phosphorus content are 0.5～1mg/L, 28～32 ℃ of water temperatures.
Anoxic pond has related parameter: hydraulic detention time 16～20h, sewage backflow are than 2～3 times, and phosphorus content is 0.5～1mg/L, 25～30 ℃ of water temperatures, pH value 7～8.
Aerobic Pond has related parameter: hydraulic detention time 32～36h, 2～3 times of return sludge ratios, water outlet phosphorus content 0.5～1mg/L; 25～30 ℃ of water temperatures, PH7～8, dissolved oxygen 2～4mg/L.
Reflux sedimentation tank has related parameter: hydraulic detention time 2～1.5h, 2～3 times of supernatant liquor reflux ratios, surface load 1～1.3m 3/ m 2H, 2～3 times of return sludge ratios.
Pretreatment system adopts physical method that heavy oil in the waste water and oil in water emulsion are removed, and makes the ununiformity of the water yield of coking chemical waste water and water quality adjusted, and its main purpose is to be that suitable condition is created in follow-up biochemical treatment; Main treatment facility comprises grease removal tank, flotation cell, equalizing tank etc.
The biochemical treatment main purpose is that the biochemical reaction by active sludge comes the poisonous and harmful substances in the treatment of Coking Wastewater, reduces the pollutant loads such as COD in the waste water; The principal facility of biochemical treatment has anaerobic pond, anoxic pond, Aerobic Pond, reflux sedimentation tank, gas blower, dosing pump house etc.
Coking chemical waste water is through entering the advanced treatment operation of embrane method after the biochemical treatment, comprising MBR membrane bioreactor, ozone oxidation operation, charcoal absorption operation and reverse osmosis membrane assembly.The Aerobic Pond mixed solution of biochemical process enters the MBR membrane bioreactor, and it is the raw water of advanced treatment process that MBR produces the water outlet of water after as biochemical treatment.The MBR of present technique is the preprocessing means as advanced treatment, MBR belongs to hollow fiber ultrafiltration membrane, the immersion structure, crown_interception can all kinds of bacterial classifications of effectively catching efficiently for they, make it be trapped in the bio-reactor fully, make biochemical reaction smooth, effectively remove corresponding pollutent, avoid sludge loss.The oxidisability of ozone is very strong, and the organism in the water is had the intensive oxidative degradation, reduces the COD in the waste water, also decolouring is had certain effect.The effect of ozonize is exactly to protect reverse osmosis membrane assembly, makes its pollution level that reduces the film surface as much as possible, improves the work period and the producing water ratio of film.Charcoal absorption is played the effect of security personnel's strainer to reverse osmosis membrane assembly, and its effect is to remove not to be consumed or redundant ozone, can also remove the COD of being partly dissolved property simultaneously, and decolouring is also had certain effect.Reverse osmosis (Reveser Osmosis, be called for short RO) is to be motivating force with pressure, and utilizes the reverse osmosis membrane can only permeate water and can not see through the selectivity of solute and make the technology of solute and water sepn in the aqueous solution.Reverse osmosis membrane assembly produces water can satisfy the clean circulating water system water quality requirement of production, being designed to of this technology adopted two cover RO films, the first cover RO will produce the water rate of recovery and accomplish 75%, the second cover RO will produce the total yield of water and accomplish more than 90%, remaining about 10% a spot of concentrated solution utilizes evaporation unit to handle, and in order to save processing costs, also can take out a part of concentrated solution and be sprayed onto coal yard, also can be used as the make up water of wet quenching, make total system accomplish zero release.
The utlity model has following advantage:
The utility model has improved the biochemical sludge concentration and the volumetric loading of biochemical reaction tank, and the cancellation coagulating treatment has been saved occupation of land; The O3 contacted oxidation water outlet can be used as production, reclaimed water or iron work and brews slag; But reverse osmosis water outlet direct reuse is in producing clean circulating water system water as a supplement, and reverse osmosis concentrated water advances evaporation unit, realizes the utilization again of water resources and the zero release of coking chemical waste water, and social benefit is very remarkable.The water quality controlling index of bio-chemical effluent after ozone, charcoal absorption are handled is COD≤80mg/L; Be generally CODCr≤20mg/L, phenol≤0.2mg/L, cyanogen≤0.2mg/L, NH through the main water-quality guideline of reverse osmosis produced water again 3-N≤3mg/L, oil can not detect, SS can not detect, PH6.5～7.5, saltiness≤150mg/L, hardness≤10mg/L are (with CaCO 3Meter), producing water ratio reaches 90%.Concentrated solution after the osmosis filtration enters evaporation unit, and its solids can be delivered to rubbish factory, the water of condensation can reuse or bringing back to life system handle again, make system accomplish zero release.
Description of drawings
Fig. 1 is a device synoptic diagram of the present utility model
As shown in the figure, 1-MBR membrane bioreactor, 2-ozone contact tower, 3-active carbon filter tower, 4-reverse osmosis membrane processing system, the dense water evaporation and crystallization system of 5-, 6-reuse water tank, 7-pretreatment system, 8-biochemical treatment system.
Embodiment
The utility model is described in further detail below in conjunction with Figure of description.
As shown in Figure 1, a kind of ozone of coking chemical waste water, gac and two embrane method advanced treatment and reclamation set, comprise pretreatment system 7 and biochemical treatment system 8, it is characterized in that: described device also comprises MBR membrane reactor 1, ozone contact tower 2, active carbon filter tower 3, reverse osmosis membrane processing system 4 and dense water evaporation and crystallization system 5;
Outlet through the coking chemical waste water after pre-treatment and the biochemical treatment is connected with described MBR membrane bioreactor 1; The water outlet of described membrane bioreactor 1 is connected with described ozone contact tower 2; The water outlet of described ozone contact tower 2 is connected with described active carbon filter tower 3; The water outlet of described active carbon filter tower 3 is connected water outlet after reverse osmosis feedwater pump and high-pressure pump series connection pressurization with described reverse osmosis membrane processing system 4; A water outlet of described reverse osmosis membrane processing system 4 is connected with described dense water evaporation and crystallization system 5, and another outlet of described reverse osmosis membrane processing system 5 is connected with reuse water tank 6.
Described MBR membrane bioreactor 1 is the thread film of tubular fibre, and the work period is 3 minutes, 30 seconds intermittently, required suction force is generally-0.01～-0.04MPa about, filtering accuracy 0.5 μ m, crossing water flux is 10～15L/m 2.hr.
Described reverse osmosis membrane processing adopts two cover systems, and described two cover systems are connected in series.
The described first cover reverse osmosis system operating pressure, 2～3.5MPa, filtering accuracy 0.001 μ m; The concentrated solution of the first cover reverse osmosis system enters the second cover reverse osmosis system, system works pressure 3.5～4.0Mpa, and final concentrated solution accounts for below 10% of the entire treatment water yield; Described concentrated solution water quality is: CODcr≤450mg/L, saltiness≤40000mg/L.
Described pretreatment system comprises grease removal tank, equalizing tank, flotation cell; Biochemical treatment system comprises anaerobic pond, anoxic pond, Aerobic Pond, reflux sedimentation tank.
Anaerobic pond has related parameter: hydraulic detention time 8～12h, phosphorus content are 0.5～1mg/L, 28～32 ℃ of water temperatures.
Anoxic pond has related parameter: hydraulic detention time 16～20h, sewage backflow are than 2～3 times, and phosphorus content is 0.5～1mg/L, 25～30 ℃ of water temperatures, pH value 7～8.
Aerobic Pond has related parameter: hydraulic detention time 32～36h, 2～3 times of return sludge ratios, water outlet phosphorus content 0.5～1mg/L; 25～30 ℃ of water temperatures, PH7～8, dissolved oxygen 2～4mg/L.
Reflux sedimentation tank has related parameter: hydraulic detention time 2～1.5h, 2～3 times of supernatant liquor reflux ratios, surface load 1～1.3m 3/ m 2H, 2～3 times of return sludge ratios.
Coking chemical waste water water-quality COD Cr＜4000mg/L, NH 3-N＜250mg/L, ss suspended solid＜300mg/L, phenol＜700mg/L, cyanogen＜20mg/L remove most COD, SS, NH in the water through pre-treatment, biochemical treatment 3Pollutents such as-N.
MBR water outlet leading indicator is generally CODCr≤150mg/L, NH 3-N≤5mg/L, SS≤5mg/L, phenol≤0.5mg/L, prussiate≤0.5mg/L;
Handle through O3 contacted oxidation and charcoal absorption again, remove the middle part of anhydrating and be difficult to pollutents such as biodegradable COD, reduce macromolecule contaminant and being partly dissolved property solids content in the water by reverse osmosis membrane separation at last, the final back water-quality guideline of handling reaches CODcr≤20mg/L, phenol≤0.2mg/L, prussiate≤0.2mg/L, NH 3-N≤3mg/L, oil can not detect, SS can not detect, PH6.5～7.5, saltiness≤150mg/L, hardness≤10mg/L are (with CaCO 3Meter), satisfy the clean circulating water quality requirement of production.Described reverse osmosis membrane adopts cross flow filter, and concentrated solution accounts for handles about 10% of the water yield, and concentrated solution water quality is: CODcr≤450mg/L, saltiness≤40000mg/L, concentrated solution also can be sprayed onto the coal yard depositing dust, also can be used as the make up water of wet quenching.
The unit type that relates in the utility model all can be purchased according to wastewater treatment capacity.
For example, for producing 1700000 tons of scale coke-oven plants of coke per year, produce coking chemical waste water 91m 3/ h, recirculated water sewer 67m 3/ h, handling the water yield so is 158m 3/ h.Biochemical system adopts A/O internal recycle biological denitrificaion treatment technology, and the MBR aquifer yield is 158m 3/ h, water-quality COD Cr≤150mg/L, NH 3-N≤5mg/L, SS≤5mg/L, phenol≤0.5mg/L, prussiate≤0.5mg/L reach national comprehensive discharge secondary standard.And then deliver to the O3 contacted oxidation tower through force (forcing) pump and fully contact with the ozone that produces from ozonizer, finish the oxygenolysis that is difficult to pollutents such as biological degradation COD is handled, be not consumed or redundant ozone, the COD of being partly dissolved property and certain colourity through the activated carbon adsorber removal again.The activated carbon adsorber water outlet is after reverse osmosis feedwater pump and high-pressure pump series connection pressurization, enter reverse-osmosis membrane element, macromolecule contaminant in the water and being partly dissolved property solids content are separated in the concentrated solution, and reverse osmosis membrane assembly produces the water water-quality guideline and reaches CODCr≤20mg/L, phenol≤0.2mg/L, prussiate≤0.2mg/L, NH 3-N≤3mg/L, oil can not detect, SS can not detect, PH6.5～7.5, saltiness≤150mg/L, hardness≤10mg/L are (with CaCO 3Meter), satisfy " urban sewage reutilization-process water water quality " requirement (GB/T19923-2005) simultaneously.The reverse osmosis unit water production rate accounts for handles about 90% of the water yield, is 142m 3/ h is back to and produces clean circulating water system water as a supplement.Isolating concentrated solution accounts for about 10% of the processing water yield and is about 16m 3/ h adopts evaporative crystallization, and the crystalline solid can send the refuse tip, the water of condensation can be used as the make up water of recirculating cooling water system equally, in order to save processing costs, also can take out a part of concentrated solution and be sprayed onto the coal yard depositing dust or, make total system accomplish zero release as the make up water of wet quenching.

Claims (5)

1. the ozone of a coking chemical waste water, gac and two embrane method advanced treatment and reclamation set, comprise pretreatment system and biochemical treatment system, it is characterized in that: described device also comprises membrane bioreactor, ozone contact tower, active carbon filter tower, reverse osmosis membrane processing system and dense water evaporation and crystallization system;
Outlet through the coking chemical waste water after pre-treatment and the biochemical treatment is connected with described membrane bioreactor; The water outlet of described membrane bioreactor is connected with described ozone contact tower; The water outlet of described ozone contact tower is connected with described active carbon filter tower; The water outlet of described active carbon filter tower is connected with high-pressure pump with the reverse osmosis feedwater pump successively, and the high-pressure pump water outlet is connected with described reverse osmosis membrane processing system; A water outlet of described reverse osmosis membrane processing system is connected with described dense water evaporation and crystallization system, and another outlet of described reverse osmosis membrane processing system is connected with the reuse water tank.
2. the ozone of coking chemical waste water as claimed in claim 1, gac and two embrane method advanced treatment and reclamation set is characterized in that: be provided with the thread film of tubular fibre in the described membrane bioreactor.
3. the ozone of coking chemical waste water as claimed in claim 1, gac and two embrane method advanced treatment and reclamation set is characterized in that: described reverse osmosis membrane processing adopts two cover reverse osmosis membrane systems to be connected in series.
4. the ozone of coking chemical waste water as claimed in claim 1, gac and two embrane method advanced treatment and reclamation set, it is characterized in that: described pretreatment system comprises grease removal tank, equalizing tank and flotation cell; Described grease removal tank, equalizing tank and flotation cell are connected successively.
5. the ozone of coking chemical waste water as claimed in claim 1, gac and two embrane method advanced treatment and reclamation set, it is characterized in that: biochemical treatment system comprises anaerobic pond, anoxic pond, Aerobic Pond and reflux sedimentation tank; Described anaerobic pond, anoxic pond, Aerobic Pond and reflux sedimentation tank are connected successively.
CN2010202310527U 2010-06-21 2010-06-21 Coking wastewater advanced treatment and reuse device by using ozone, active carbon and double-membrane process CN201817356U (en)

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Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103253832A (en) * 2013-05-31 2013-08-21 神华集团有限责任公司 Reusing treatment method of coking wastewater
CN103319048A (en) * 2013-06-29 2013-09-25 惠州市众惠环保工程有限公司 Method for recycling moisture from high-concentration organic sewage
CN103553269A (en) * 2013-10-31 2014-02-05 北京清大国华环保科技有限公司 Method and device for treating and recycling semi-coke wastewater
CN103663860A (en) * 2013-10-30 2014-03-26 郭强 Treatment method of high-concentration wastewater
CN104402174A (en) * 2014-11-28 2015-03-11 云南圣清环保科技有限公司 Deep treatment method of coal chemical industry wastewater
CN108314230A (en) * 2018-01-29 2018-07-24 中竞同创能源环境科技集团股份有限公司 A kind of coal chemical industry sewage processing system
CN108455790A (en) * 2018-02-13 2018-08-28 鞍钢股份有限公司 A kind of biochemistry and deep treatment method of coking wastewater
CN111072217A (en) * 2018-10-22 2020-04-28 中国石油化工股份有限公司 Method for advanced treatment and recycling of saliferous oil refining wastewater

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103253832A (en) * 2013-05-31 2013-08-21 神华集团有限责任公司 Reusing treatment method of coking wastewater
CN103253832B (en) * 2013-05-31 2015-07-01 神华集团有限责任公司 Reusing treatment method of coking wastewater
CN103319048A (en) * 2013-06-29 2013-09-25 惠州市众惠环保工程有限公司 Method for recycling moisture from high-concentration organic sewage
CN103663860A (en) * 2013-10-30 2014-03-26 郭强 Treatment method of high-concentration wastewater
CN103663860B (en) * 2013-10-30 2015-04-08 郭强 Treatment method of high-concentration wastewater
CN103553269A (en) * 2013-10-31 2014-02-05 北京清大国华环保科技有限公司 Method and device for treating and recycling semi-coke wastewater
CN104402174A (en) * 2014-11-28 2015-03-11 云南圣清环保科技有限公司 Deep treatment method of coal chemical industry wastewater
CN108314230A (en) * 2018-01-29 2018-07-24 中竞同创能源环境科技集团股份有限公司 A kind of coal chemical industry sewage processing system
CN108455790A (en) * 2018-02-13 2018-08-28 鞍钢股份有限公司 A kind of biochemistry and deep treatment method of coking wastewater
CN111072217A (en) * 2018-10-22 2020-04-28 中国石油化工股份有限公司 Method for advanced treatment and recycling of saliferous oil refining wastewater

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