CN204824453U - Desulfurization pretreatment of water device that gives up - Google Patents

Desulfurization pretreatment of water device that gives up Download PDF

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Publication number
CN204824453U
CN204824453U CN201520547485.6U CN201520547485U CN204824453U CN 204824453 U CN204824453 U CN 204824453U CN 201520547485 U CN201520547485 U CN 201520547485U CN 204824453 U CN204824453 U CN 204824453U
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pond
level
order reaction
settling pond
mud
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CN201520547485.6U
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齐延山
付建新
王皖蒙
董俊
孙磊
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Nanjing Cec Environmental Protection Co Ltd
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Nanjing Cec Environmental Protection Co Ltd
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Abstract

The utility model provides a desulfurization pretreatment of water device that gives up, includes consecutive aeration equalizing basin (1), pH regulating box (2), first order reaction settling chamber (3), one -level flocculation case (4), one -level depositing reservoir (5), second order reaction settling chamber (6), second grade flocculation case (7), second grade depositing reservoir (8), middle pond (9), multi -media filter (10), wherein, the aeration equalizing basin sets up the ultrasonic wave level gauge, and the bottom sets up aeration equipment, PH regulating box, first order reaction settling chamber, one -level flocculation case, second order reaction settling chamber, second grade flocculation case all are equipped with the chemicals feeder and construct, still be equipped with the mud counterbalance cell, the bottom of the pool of one -level depositing reservoir, second grade depositing reservoir is equipped with pipe connection mud counterbalance cell (11), one -level depositing reservoir, second grade depositing reservoir, mud counterbalance cell set up mud position meter. The utility model discloses to desulfurization waste water carry on that oxidation, neutralization, heavy metal ion are got rid of, flocculating settling, clarification, filtration.

Description

A kind of desulfurization wastewater pretreatment unit
One, technical field
The utility model belongs to water-treatment technology field, is specifically related to a kind of fuel-burning power plant desulfurization wastewater pretreatment unit.
Two, background technology
Along with the construction with large coal-fired power plant that develops rapidly of China's energy industry, firing rate constantly increases, SO 2quantity discharged get more and more.Current flue gas desulfurization is considered to control SO 2the most effective approach of quantity discharged.Limestone-gypsum wet flue gas desulfurization applies the sulfur removal technology maximum, technology is the most ripe in the world.The desulfurization wastewater that Gypsum Wet produces, its pH is 4 ~ 6, containing a large amount of suspended substance (gypsum particle, SiO 2, Al and Fe oxyhydroxide), fluorochemical and contents of many kinds of heavy metal ion (As, Cd, Cr, Hg etc.), hardness is high, and saltiness is large.Direct discharge will cause serious harm to environment, thus must be administered it.
Meanwhile, along with water resources is day by day deficient, will be more and more stricter to the control criterion of water pollution.For realizing recycle and the energy-saving and emission-reduction of water resources, from the viewpoint of Sustainable development, the recovery of waste water (comprising desulfurization wastewater class high salt waste) and zero release are the inexorable trends of power plant water development.Treatment process at present for power plant desulfurization waste water mainly contains chemical tendering+ultrafiltration+reverse osmosis, chemical tendering+multiple-effect evaporation, and two kinds for the treatment of processs all require to carry out pre-treatment to desulfurization wastewater.
Desulfurization wastewater pre-treatment is the important component part realizing Waste Water From Fire Power Plant reuse and zero release.The material that desulfurization wastewater pretreatment unit is mainly removed is heavy metal ion, fluorochemical and suspended substance and hardness etc.With case, coagulation case and sludge box during current desulfurizing waste water processing device generally adopts, this kind of technical finesse efficiency is not high, and poor to the adaptability of influent quality change, effluent quality is unstable, is difficult to the inflow requirement reaching follow-up reuse treatment process.
Three, utility model content
The purpose of this utility model is, there is provided that a kind of sufficient reacting is stable, automation degree of equipment is high, process efficient desulfurization wastewater pretreatment unit, various pollution in waste water can not only be processed, reduce chemical feeding quantity and sludge quantity, and follow-up reuse technology inflow requirement can be met.
The technical solution of the utility model is: a kind of desulfurization wastewater pretreatment unit, comprises aerating regulation pond 1 connected successively, pH regulator case 2, first order reaction sludge box 3, one-level flocculation tanks 4, one-level settling pond 5; Second order reaction sludge box 6, secondary flocculation tanks 7, secondary settling pond 8, intermediate pool 9, more medium filter 10, wherein, aerating regulation pond 1 arranges ultrasonic level gage, and bottom arranges aerating apparatus; PH regulator case 2, first order reaction sludge box 3, one-level flocculation tanks 4, second order reaction sludge box 6, secondary flocculation tanks 7 are equipped with medicating mechanism; Also be provided with sludge balance pond 11, be provided with pipeline at the bottom of the pond of one-level settling pond 5, secondary settling pond 8 and connect sludge balance pond 11; One-level settling pond 5, secondary settling pond 8, sludge balance pond 11 arrange mud level meter.
The plate-and-frame filter press 12 of mud-water separation is provided with behind sludge balance pond 11.
The utility model desulfurization wastewater pretreatment unit, comprises coagulation device, second-stage treatment device, sludge dehydration device and chemicals dosing plant; PH regulator case 2, first order reaction sludge box 3, one-level flocculation tanks (point two lattice) 4, second order reaction sludge box 6, secondary flocculation tanks (point two lattice) 7 arranges whipping appts; One-level settling pond 5, secondary settling pond 8 arrange Scraping device; Aerating regulation pond 1 arranges ultrasonic level gage, and bottom arranges aerating apparatus; PH regulator pond 2, second order reaction sludge box 6 and more medium filter 10 install pH meter; The outlet of one-level settling pond 5, secondary settling pond 8 arranges turbidometer; More medium filter 10 arranges differential manometer.
The Main Function of coagulation device removes suspended substance, heavy metal ion and the magnesium ion in desulfurization wastewater, comprises aerating regulation pond, pH regulator case, first order reaction sludge box, one-level flocculation tanks, one-level settling pond.The Main Function of second-stage treatment device removes calcium, the magnesium ion in desulfurization wastewater, comprises second order reaction sludge box, secondary flocculation tanks, secondary settling pond, intermediate pool, more medium filter.
PH regulator case, first order reaction sludge box, one-level flocculation tanks, second order reaction sludge box, secondary flocculation tanks arrange agitator, control stirring intensity and realize reaction fully.
PH regulator case, second order reaction sludge box, intermediate pool arrange pH meter, for monitoring wastewater pH.
One-level settling pond, secondary settling pond arrange mechanical Scraping device, and arrange mud level meter.Secondary settling pond arranges sludge refluxing apparatus, refluxing portion mud is to second order reaction sludge box strengthening reaction effect, and the mud height of settling pond is monitored by mud level meter, when exceeding setting range, mud valve bottom settling pond is opened, and mud gravity flow enters sludge balance pond.One-level settling pond outlet pipeline, multi-medium filtering outlet pipeline arrange turbidity monitoring device, for monitoring the turbidity of one-level settling pond and more medium filter product water.
Sludge dehydration device comprises sludge balance pond, sheet frame water extracter.Chemicals dosing plant comprises lime chemicals dosing plant, organosulfur chemicals dosing plant, sodium hydroxide chemicals dosing plant, coagulant drug-adding device, coagulant aids chemicals dosing plant, soda ash chemicals dosing plant, hydrochloric acid chemicals dosing plant.
In the utility model scheme, equalizing tank arranges aerating apparatus, by aerating regulation water quality, ensures the steady running of desulfurization wastewater pretreatment unit, the sulfite ion in desulfurization wastewater can be oxidized to sulfate ion simultaneously, reduce desulfurization wastewater COD.
Sludge balance pond arranges mud level meter, and when reaching set(ting)value, sludge pump is opened automatically, mud is delivered to plate-and-frame filter press and dewaters, and the mud cake after dehydration is used as sweetening agent or outward transport is disposed, and supernatant liquor is back to and regulates aeration tank again to process.
Chemicals dosing plant is placed in dosing.The medicament that desulfurization wastewater pretreatment system adds mainly comprises milk of lime, organosulfur, sodium hydroxide, hydrochloric acid, coagulating agent, coagulant aids, soda ash.
Pretreatment unit Main Function comprise desulfurization wastewater be oxidized, neutralize, removal of heavy metal ions, flocculating settling, clarification, filtration etc.Aerating regulation arranges aerating apparatus bottom pond, and one-level settling pond and secondary settling pond arrange Scraping device, and secondary settling pond partial sludge is back to second order reaction sludge box, and one-level, secondary settling pond spoil disposal are to sludge balance pond.Sludge balance pond is provided with mud level meter, and when reaching set(ting)value, sludge pump is opened automatically, mud is delivered to plate-and-frame filter press and dewaters, and the mud cake after dehydration is used as sweetening agent or outward transport is disposed, and supernatant liquor is back to and regulates aeration tank circular treatment again.Level of automation is high, and structure is simple, and stablize desulfurization wastewater treatment effect, effluent quality meets the inflow requirement of follow-up reuse treatment process.
The beneficial effects of the utility model, utilize device of the present utility model that desulfurization wastewater sufficient reacting can be made to stablize, be a kind of automation degree of equipment high, process efficient desulfurization wastewater pretreatment unit, various pollution in waste water can not only be processed, reduce chemical feeding quantity and sludge quantity, and follow-up reuse technology inflow requirement can be met.
Four, accompanying drawing explanation
Accompanying drawing 1 is structural representation of the present utility model.
In figure: 1-aerating regulation pond, 2-pH regulator case, 3-first order reaction sludge box, 4-one-level flocculation tanks (point two lattice), 5-one-level settling pond, 6-second order reaction sludge box, 7-secondary flocculation tanks (point two lattice), 8-secondary settling pond, 9-intermediate pool, 10-more medium filter, 11-sludge balance pond, 12-plate-and-frame filter press.
Five, embodiment
Below in conjunction with accompanying drawing, the utility model is described further.
With reference to Fig. 1, a kind of desulfurization wastewater pretreatment unit, comprises aerating regulation pond 1, pH regulator case 2, first order reaction sludge box 3, one-level flocculation tanks (point two lattice) 4, one-level settling pond 5, second order reaction sludge box 6, secondary flocculation tanks (point two lattice) 7, secondary settling pond 8, intermediate pool 9, more medium filter 10, sludge balance pond 11, plate-and-frame filter press 12.Wherein, pH regulator case 2, first order reaction sludge box 3, one-level flocculation tanks (point two lattice) 4, second order reaction sludge box 6, secondary flocculation tanks (point two lattice) 7 arranges whipping appts; One-level settling pond 5, secondary settling pond 8 arrange Scraping device; Aerating regulation pond 1 arranges ultrasonic level gage, and bottom arranges aerating apparatus; PH regulator case 2, second order reaction sludge box 6 and more medium filter 10 install pH meter; The outlet of one-level settling pond 5, secondary settling pond 8 arranges turbidometer; One-level settling pond 5, secondary settling pond 8, sludge balance pond 11 arrange mud level meter; More medium filter 10 arranges differential manometer.
During concrete enforcement, desulfurization wastewater pretreatment unit process waste water mainly comprises following several stages:
(1) desulfurization wastewater enters in aerating regulation pond 1, under aerating apparatus effect, the sulfite ion in desulfurization wastewater is oxidized to sulfate ion, removes part pollutent, reduces desulfurization wastewater COD.Ultrasonic level gage monitoring aerating regulation pond 1 liquid level, controls waste water lifting pump operation automatically.Desulfurization wastewater passes through waste water lifting pump delivery to pH regulator case 2.
(2) in pH regulator case 2, a certain amount of lime is added, and constantly stir, pH value is made to be adjusted to 9.5 ± 0.2, remove hard temporarily, fluorion and calcium ion generate fluorine calcium deposit, sulfate ion and calcium ion generate calcium sulfate precipitation, and are settled out most of heavy metal ion with the form of oxyhydroxide.Then first order reaction case 3 is flowed into.
(3) in first order reaction sludge box 3, precipitate the heavy metal that can not be precipitated out with hydroxide form further by adding organosulfur, and add sodium hydroxide solution, continue to improve pH value, to precipitate the magnesium ion in waste water, remove hardness further.Then one-level flocculation tanks 4 is flowed into.
(4) in one-level flocculation tanks (point two lattice) 4, add coagulating agent, make the colloidal solid in waste water de-steady, cohesion forms many small throw outs; Add flocculation agent, make small throw out form by the effect of absorption crane span structure the macrobead thing being easy to sedimentation, be convenient to be separated in subsequent stage settling pond 5.
(5) one-level settling pond 5 is for carrying out precipitate and separate to the suspended substance of itself in the throw out produced and waste water, and supernatant liquor is from flowing to second order reaction sludge box 6.The mud height of one-level settling pond 5 is monitored by mud level meter, and when exceeding setting range, the mud valve bottom one-level settling pond 5 is opened, and mud gravity flow enters sludge balance pond 11.One-level settling pond 5 outlet pipeline is provided with turbidity monitoring device, and produce the turbidity of water for monitoring one-level settling pond, if delivery turbidity exceeds set(ting)value, water outlet is back in aerating regulation pond 1 and again processes.
(6) second order reaction sludge box 6, add soda ash and sodium hydroxide solution to precipitate calcium ion in waste water and remaining unprecipitated magnesium ion, secondary settling pond 8 partial reflux sludge reflux is to second order reaction sludge box 6 simultaneously.Water outlet flows into secondary flocculation tanks 7.
(7) in secondary flocculation tanks (point two lattice) 7, add coagulating agent, make the colloidal solid in waste water de-steady, cohesion forms many small throw outs; Add flocculation agent, make small throw out form by the effect of absorption crane span structure the macrobead thing being easy to sedimentation, be convenient to be separated in succeeding level-two settling pond 8.
(8) secondary settling pond 8 is for carrying out precipitate and separate to the throw out produced, and supernatant liquor is from flowing to intermediate pool 9.The mud height of secondary settling pond 8 is monitored by mud level meter, and when exceeding setting range, the mud valve bottom secondary settling pond 8 is opened, and mud gravity flow enters sludge balance pond 11.
(9) intermediate pool 9 arranges pH meter, by adding hydrochloric acid, regulates waste water ph to be between 6-9.The contaminant filters such as particulate matter tiny in waste water, suspended substance, colloid, through more medium filter 10, are removed by the waste water after adjustment pH, ensure delivery turbidity.Turbidometer being set at more medium filter outlet pipeline, for monitoring product water turbidity, ensureing to meet subsequent disposal requirement.
(10) arrange sludge balance pond 11, balance desulfurization wastewater pretreatment unit produces the amount of mud.The mud gravity flow that one-level settling pond 5 and secondary settling pond 8 produce enters sludge balance pond 11, mud level meter is provided with in sludge balance pond 11, when reaching set(ting)value, sludge pump is opened automatically, mud is delivered to plate-and-frame filter press 12 to dewater, mud cake after dehydration is used as sweetening agent or outward transport is disposed, and supernatant liquor is back to and regulates aeration tank 1 circular treatment again.
Those of ordinary skill in the field are to be understood that: the foregoing is only specific embodiment of the utility model; be not limited to the utility model; all within spirit of the present utility model and principle; any amendment of making, equivalent replacement, improvement etc., all should be included within protection domain of the present utility model.

Claims (4)

1. a desulfurization wastewater pretreatment unit, is characterized in that: comprise aerating regulation pond (1) connected successively, pH regulator case (2), first order reaction sludge box (3), one-level flocculation tanks (4), one-level settling pond (5); Second order reaction sludge box (6), secondary flocculation tanks (7), secondary settling pond (8), intermediate pool (9), more medium filter (10), wherein, aerating regulation pond arranges ultrasonic level gage, and bottom arranges aerating apparatus; PH regulator case, first order reaction sludge box, one-level flocculation tanks, second order reaction sludge box, secondary flocculation tanks are equipped with medicating mechanism; Also be provided with sludge balance pond, be provided with pipeline at the bottom of the pond of one-level settling pond, secondary settling pond and connect sludge balance pond (11); One-level settling pond, secondary settling pond, sludge balance pond arrange mud level meter.
2. sewage pretreatment device according to claim 1, is characterized in that: the plate-and-frame filter press (12) being provided with mud-water separation behind sludge balance pond.
3. desulfurization wastewater pretreatment unit according to claim 1, is characterized in that: pH value surge tank, first order reaction sludge box, one-level flocculation tanks, second order reaction sludge box, secondary flocculation tanks all arrange whipping appts; One-level settling pond, secondary settling pond arrange Scraping device.
4. desulfurization wastewater pretreatment unit according to claim 1, is characterized in that: aerating regulation pond arranges ultrasonic level gage, and bottom arranges aerating apparatus; PH regulator case, second order reaction sludge box and more medium filter install pH meter; The outlet of one-level settling pond, secondary settling pond arranges turbidometer; More medium filter arranges differential manometer.
CN201520547485.6U 2015-07-24 2015-07-24 Desulfurization pretreatment of water device that gives up Active CN204824453U (en)

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105540977A (en) * 2016-01-14 2016-05-04 中电环保股份有限公司 Desulfurized waste water treatment method and system
CN105692959A (en) * 2016-03-01 2016-06-22 大唐环境产业集团股份有限公司 Low-sludge-output desulfurization waste water treatment device and method
CN106517569A (en) * 2016-05-17 2017-03-22 山东百川集大环境工程有限公司 Zero discharge treatment process for desulfurization wastewater
CN110078249A (en) * 2018-01-25 2019-08-02 宝山钢铁股份有限公司 Remove the deep treatment method and system of COD and total iron in power plant desulfurization wastewater
CN110357304A (en) * 2019-07-19 2019-10-22 中电环保股份有限公司 A kind of desulfurization wastewater softening microfiltration systems and technique

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105540977A (en) * 2016-01-14 2016-05-04 中电环保股份有限公司 Desulfurized waste water treatment method and system
CN105692959A (en) * 2016-03-01 2016-06-22 大唐环境产业集团股份有限公司 Low-sludge-output desulfurization waste water treatment device and method
CN106517569A (en) * 2016-05-17 2017-03-22 山东百川集大环境工程有限公司 Zero discharge treatment process for desulfurization wastewater
CN110078249A (en) * 2018-01-25 2019-08-02 宝山钢铁股份有限公司 Remove the deep treatment method and system of COD and total iron in power plant desulfurization wastewater
CN110357304A (en) * 2019-07-19 2019-10-22 中电环保股份有限公司 A kind of desulfurization wastewater softening microfiltration systems and technique

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