CN100410193C - Method for treating wastewater from ADC vesicant, and integrated plant - Google Patents
Method for treating wastewater from ADC vesicant, and integrated plant Download PDFInfo
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- CN100410193C CN100410193C CNB2006100853508A CN200610085350A CN100410193C CN 100410193 C CN100410193 C CN 100410193C CN B2006100853508 A CNB2006100853508 A CN B2006100853508A CN 200610085350 A CN200610085350 A CN 200610085350A CN 100410193 C CN100410193 C CN 100410193C
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Abstract
The present invention relates to a waste water treatment technique of environmental science and engineering, particularly to a waste water treatment method by using an ADC foaming agent and an integrated device thereof. The waste water treatment method is characterized in that technology combining a physical method and a biochemical method is adopted; the previous part is the physical method in which waste water is preliminarily treated by using an ultrasonic method; the later part is the biochemical method in which an oxygen deficiency pool (A) is fore arranged based on DAT-IAT technology, and thus, A/DAT-IAT technology is formed; and the front part and the later part is connected through a middle water storage tank. The constructional work of the present invention has a compact structure and integrates with the functions of regulation of water quantity and water quality, biochemical reaction and sludge deposition. Besides, the constructional work also has the advantages of short technologic process, compact arrangement, easy realization of automation, toxicity resistance, stable operation, high treatment efficiency and good yielding water quality.
Description
Technical field
The present invention relates to the wastewater processing technology in the Environmental Science and Engineering, refer in particular to ADC whipping agent method of wastewater treatment and integrated apparatus.
Background technology
The chemical name of ADC whipping agent is that (English name is Cellmic C 121
Azodicarbonamide),Molecular formula is C
2H
4O
2N
2, outward appearance is flaxen crystalline powder, and decomposition temperature is emitted a large amount of nitrogen at 195～220 ℃ during decomposition, other gases such as an amount of carbon monoxide and a spot of carbonic acid gas and ammonia.ADC is nontoxic, odorless, nonflammable, and it is big to have a gas forming amount, and bubble is even, and is pollution-free to goods, and the gas that is produced is nontoxic, and mould is not corroded, and controlled temperature does not easily influence and solidifies or characteristics such as shaping speed.At present this product is widely used as the whipping agent in plastics such as polyvinyl chloride, polypropylene, polyethylene, polymeric amide, chloroprene rubber, natural rubber, paracril, silicon rubber and the Rubber processing process.
ADC whipping agent waste water is the high-concentration ammonia nitrogenous wastewater that a kind of complicated component is difficult to degrade.The production process of ADC comprises several stages: clorox is synthetic, and hydrazine is synthetic, condensation, and oxidation etc., ADC waste water is mainly derived from the mother liquor of condensation workshop section discharging and hydrazo-dicarbonamide washes etc.The ammonia nitrogen waste water of these high densitys can cause water to pollute as the not treated environment that directly enters, and will the existence of hydrocoles such as fish be constituted a threat to, and stimulates waterplant excessive multiplications such as algae, forms eutrophication phenomenons such as red tide, influences people's life.Still there is not reliable improvement technology both at home and abroad.
Existing treatment process mainly contains physico-chemical process, wherein in the prior art Yao Jicheng is arranged, wear the group, Zhou Xisheng＜ADC whipping agent Wastewater Treatment and research〉(the 11st the 3rd phase 1998.9 of volume of pollution prevention technique magazine), what it adopted is chemical method, and the material of usefulness is lime and chlorinated lime, though such method has certain effect, but ammonia-N removal rate has only 35.4%, and the clearance of chemical oxygen demand (COD) has only 78.1%.In addition, also has secondary pollution such as large quantities of lime slag.Other has patent of invention:＜ADC foaming agent condensed mother liquor comprehensive utilization novel method〉(patent No.: CN2005100382685), the principle of this method is to add alkali gas to carry, though have certain effect, shortcoming is that the alkali number that consumes is too much, and energy expenditure is excessive.
Summary of the invention:
The purpose of this invention is to provide ADC whipping agent method of wastewater treatment and the integrated apparatus that effectively to handle high-concentration ammonia nitrogenous wastewater.
It is characterized in that adopting physico-chemical process and biochemical process process combined, a wherein preceding part is a physico-chemical process, adopts ultrasonic method to carry out pre-treatment, can cut down ammonia nitrogen and chemical oxygen demand (COD) in a large number, but can not finally deal with problems.A back part is a biochemical process, and a preposition anoxic pond (A) has promptly formed A/DAT-IAT technology on DAT-IAT technology basis, can reach national grade one discharge standard after treatment, and front and back two portions connect with middle aqua storage tank.
Realize the device of the method for the invention: the ultrasonic method pre-processing device of front mainly is made of device four parts of ultrasonic generator, ultrasonic transducer and tank, aeration, and wherein ultrasonic generator is the key part of decision water treatment effect.Ultrasonic generator is transported to ultrasonic transducer with the high frequency electrical signal that common power frequency electricity is transformed into 20KHZ above (being generally 20KHZ to 10MHZ), thereby produce strong vibration of ultrasonic wave, and propagate in the waste water, produce series of physical and chemical effect, promoted chemical pollutant degraded in the waste water.The biochemical process treatment facility of back comprises the aerobic-aeration tank, gap of preposition anaerobic pond, and it is in series by anoxic pond, DAT pond and IAT pond three parts.Aqua storage tank in the middle of between ultrasonic method pre-processing device and biochemical process treatment facility, being provided with.Also be furnished with the heating temperature control device in this aqua storage tank, make wastewater temperature remain on 23-25 degree centigrade; In addition, also, constantly supply with NaH with chemicals dosing plant
2PO
4, to satisfy the needs of microorganism to phosphoric; The inlet channel of also having sanitary sewage (or other carbon sources) is to satisfy the needs of microorganism to carbon.
Ultrasonic method is carried out pretreated principle: the ultrasonic propagation process is the expansion and the compression alternative process of ripple just, ultrasonic wave produces underbalance effect to liquid in expansion period, the negative pressure that puts on liquid makes the liquid fracture and produces the hole, form cavitation nucleus, promptly generate gassiness bubble in liquid, this phenomenon is called as cavitation phenomenon.The bubble residence time that cavitation is come out is very short, almost be just to have generated the pressure that just is subjected at once from adjacent compression zone, cause these bubbles in utmost point collapse disappearance rapidly in the short period of time, and in the little space scope around it, produce localized hyperthermia (up to 5000K) and partial high pressure (can reach 50MPa), follow intensive shockwave and speed to occur up to the 100m/s microjet, these physical conditions provide a very favourable physicochemical environment for chemical pollutant degraded in the waste water.On the one hand TRANSIENT HIGH TEMPERATURE, the high pressure that collapses generation rapidly because of bubble makes that water molecules is cracked into strong oxidative free radicals such as H, HO, HO2 and H2O2 in the bubble:
H
2O→H·+HO·
H·+O
2→HO
2·
2HO·→H
2O
2
2HO
2·→H
2O
2+O
2
These strong oxidizing property materials directly and indirect action in water body chemical pollutant and they are oxidized to other materials such as CO2, H2O, mineral ion.Owing to the effect of shockwave and microjet, pollution substance can enter the pyrolytic reaction of directly carrying out similar combustion chemistry reaction in the bubble, and degradation rate is bigger on the other hand.
When having ammonia nitrogen to exist in the water body, free ammonia is volatilizable to enter the direct pyrolysis of cavitation bubble, simultaneously by the free-radical oxidn of liquid phase main body, generates N
2, N
2O overflows, and perhaps generates nitrate and nitrite and stays in the waste water, and the partial oxidation equation is as follows:
2NH
3+6HO·→N
2+6H
2O
2NH
3+8HO·→N
2O+7H
2O......
The principle that biochemical process is handled is: A/DAT-IAT technology is the same with traditional activated sludge process, all is to utilize microorganism that pollutent in the waste water is decomposed, and reaches the purpose that purifies water.Different with traditional activated sludge process is, A/DAT-IAT technology is that the reaction tank by three difference in functionalitys combines, and these three ponds both can have been regarded preposition anoxic pond on the basis in DAT-IAT pond as, also can regard connecting of A/O pond and SBR pond as.Anoxic pond is exactly in order to improve the low weakness of DAT-IAT technology nitric efficiency.
Structure structure compactness of the present invention, collecting water from runoff and water quality regulation, biochemical reaction and sludge settling function are provided with training wall between two ponds, avoided two tank waterpowers to disturb, improved the waterpower state, the IAT pond almost is in static state deposition, and its sedimentation effect is better than second pond.Technical process of the present invention is short, and compact in design easily is automated.Stages such as that the operation of A/DAT-IAT system has been experienced is aerobic, anoxic, anaerobism, precipitation, screened dominant bacteria, suppressed hyphomycetic growth, the settling property and the dewatering of mud are good.Organism in the waste water provides additional carbon for this section denitrification, and in addition, the basicity that denitrification produces can offer nitrated section, the H+ of this section generation that neutralizes.A/DAT-IAT technology adapts to water quantity and quality and changes big waste water, have the toxic function of opposing, stable, processing efficiency is high, effluent characteristics good.The IAT pond can be considered extended aeration, and organic loading is very low, helps the carrying out of nitration reaction, can utilize endogenous carbon to carry out anti-nitration reaction at precipitate phase.
Description of drawings
Fig. 1 is a ultrasonic method pre-processing device synoptic diagram of the present invention
Fig. 2 is a biochemical process treatment facility synoptic diagram
Fig. 3 is a biochemical process treatment facility main reactor perspective illustration
Fig. 4 is total synoptic diagram of integrated apparatus of the present invention
1. dividing plate 13. aeration heads 14. air compressor machines 15. rear bulkheads 16. went out water pump 17. outlet sumies 18. reflux pumps 19. ultrasonic devices 21. biochemical reactors 20. middle aqua storage tank 22. doser (N before ultra-sonic generator 2. transverter 3. tanks, 4. tracheaes and gas were chewed 5. thermal insulation layers, 6. water-ins, 7. water outlets, 8. blower fans, 9. pump sumps, 10. intake pumps, 11. agitators 12.
aH
2PO
4) 23. heating thermostats, 24. sanitary sewages (or other carbon sources) inlet channel
Embodiment
The used integrated apparatus of the present invention is made up of three parts: 1. a part mainly comprises ultrasonic generator, ultrasonic transducer and tank before, and wherein ultrasonic generator is the key part of decision water treatment effect.Ultrasonic generator is transported to ultrasonic transducer with the high frequency electrical signal that common power frequency electricity is transformed into 20KHZ above (being generally 20KHZ to 10MHZ), thereby produce strong vibration of ultrasonic wave, and propagate in the waste water, produce series of physical and chemical effect, promoted chemical pollutant degraded in the waste water.Simultaneously, for reinforced effects in this part also with the device of aeration, used blower fan is placed on the bottom, gas pipeline and valve are arranged in portion on the lower side.2. a back part is the biochemical process treatment facility, and mainly by preposition anaerobic pond (A), aerobic basin (DAT) and aeration tank, gap (IAT) three parts are in series.3. aqua storage tank in the middle of between ultrasonic method pre-processing device and biochemical process treatment facility, being provided with.Is furnished with the heating temperature control device in the groove, the water feed apparatus of chemicals dosing plant and sanitary sewage.
The working process of the preceding part of wastewater treatment (as shown in Figure 1):
Waste water flows into the ultrasonic method pre-processing device by water-in 6, in tank 3, is subjected to violent action of ultrasonic waves, and the concentration of ammonia nitrogen and chemical oxygen demand (COD) descends significantly.This is because ultrasonic generator 1 is transported to ultrasonic transducer 2 with the high frequency electrical signal that common power frequency electricity is transformed into 20KHZ above (being generally 20KHZ to 10MHZ), thereby produce strong vibration of ultrasonic wave, and propagate in the waste water, produce series of physical and chemical effect, promoted chemical pollutant degraded in the waste water.Simultaneously, for reinforced effects in this part also with the device of aeration, air sucks from blower fan 8, enters in the waste water through tracheae and valve 4.The outer thermal insulation layer that is with of equipment 5 remains on about 20 ℃ temperature.Present embodiment has adopted the equipment of Xi'an Kang Ming ultrasonic wave company, and assembles, and used frequency is 28KHZ, and power is 300W.In addition, in process of the test, also need to add a spot of Fenton reagent.
By this device processes, the ammonia nitrogen of the high density in the ADC whipping agent can be reduced to 150mg/L from 2000mg/L, and clearance is 92.5%, and it is 80% that chemical oxygen demand (COD) can be reduced to the 200mg/L clearance from 1000mg/L, through simple biological treatment, just can reach discharging standards again.
The latter part of working process (as shown in Figure 2) of wastewater treatment:
Waste water flows into anoxic pond (being the A pond) from tank 9 through intake pump 10, cavity through preceding dividing plate 12 flows into aerobic basin (being the DAT pond), air is sucked by air compressor machine 14, enter aerobic basin through gas pipeline and aeration head 13, ammonia nitrogen in the waste water is oxidized to nitric nitrogen, waste water flows into anoxic pond through reflux pump 18, by denitrification, becomes nitrogen and overflows in the pond.The water inlet of aerobic basin is a successive.Waste water in the aerobic basin flows into aeration tank, gap (being the IAT pond) through the cavity of rear bulkhead 15, and waste water is in the pond, and through water inlet, aeration precipitates, and in 4 stages such as draining, flows into outlet sumies 17 by going out water pump 16.In this pond, waste water is become nitrogen at precipitate phase by denitrification and overflows further by nitrated.Draining is interrupted for being interrupted water inlet in this pond.
According to test of many times, when temperature is 23-25 ℃, as water inlet NH
3-N concentration is 150mg/L, then water outlet NH
3It is 90% that-N concentration can reach the 15mg/L clearance; When water inlet COD concentration is 200mg/L, then effluent COD concentration can reach below the 10mg/L, clearance is 95%, but in order to improve the transformation efficiency of ammonia nitrogen, increases carbon source, so must additionally increase COD, make into that water COD total concn reaches 750mg/L, even so, but effluent COD concentration still can reach below the 60mg/L; From process of the test, control water inlet NH3-N concentration is for guaranteeing that water outlet NH3-N qualified discharge is most important, this test water inlet NH
3-N concentration should be controlled at below the 150mg/L.
Aqua storage tank 20 (as shown in Figure 4) in the middle of between ultrasonic method pre-processing device and biochemical process treatment facility, being provided with.Also be furnished with heating thermostat 23 in this aqua storage tank, make wastewater temperature remain on 23-25 degree centigrade; In addition, also, constantly supply with NaH with doser 22
2PO
4, to satisfy the needs of microorganism to phosphoric; The inlet channel 24 of also having sanitary sewage (or other carbon sources) is to satisfy the needs of microorganism to carbon.
Claims (3)
1. ADC whipping agent method of wastewater treatment, it is characterized in that adopting physico-chemical process and biochemical process process combined, a wherein preceding part is a physico-chemical process, adopt ultrasonic method to carry out pre-treatment, a back part is a biochemical process, a preposition anoxic pond has promptly formed anoxic pond-DAT-IAT technology on DAT-IAT technology basis, and aqua storage tank connected in the middle of front and back two portions adopted.
2. ADC whipping agent wastewater treatment integral method according to claim 1 is characterized in that being furnished with the heating temperature control device, the water feed apparatus of chemicals dosing plant and sanitary sewage in the described middle aqua storage tank.
3. realize the ADC whipping agent wastewater treatment integrated apparatus of the described method of claim 1, it is characterized in that: the ultrasonic method pre-processing device mainly is made of device four parts of ultrasonic generator, ultrasonic transducer and tank, aeration, the biochemical process treatment facility comprises the aerobic-aeration tank, gap of preposition anoxic pond, and it is in series by anoxic pond, DAT pond and IAT pond three parts; Aqua storage tank in the middle of ultrasonic method pre-processing device and biochemical process treatment facility are provided with.
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|---|---|---|---|
| CNB2006100853508A CN100410193C (en) | 2006-06-12 | 2006-06-12 | Method for treating wastewater from ADC vesicant, and integrated plant |
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|---|---|---|---|
| CNB2006100853508A CN100410193C (en) | 2006-06-12 | 2006-06-12 | Method for treating wastewater from ADC vesicant, and integrated plant |
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| CN100410193C true CN100410193C (en) | 2008-08-13 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102153157B (en) * | 2010-12-09 | 2012-07-25 | 河南煤业化工集团有限责任公司 | ADC (Azodicarbonamide) foaming agent condensation mother liquor as well as washing waste water recycling device and method |
| CN103043846A (en) * | 2011-10-12 | 2013-04-17 | 中国石油化工股份有限公司 | Acrylic fiber waste water treatment method |
| CN102826520B (en) * | 2012-09-17 | 2014-06-04 | 宁夏日盛实业有限公司 | Method for implementing co-production of ammonium sulfate from ADC foaming agent wastewater by extracting hydrazine hydrate |
| CN108298776A (en) * | 2018-04-16 | 2018-07-20 | 沈阳环境科学研究院 | A kind of sewage treatment plant carries mark modernization system and sewage water treatment method |
Citations (5)
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| CN1396126A (en) * | 2001-07-16 | 2003-02-12 | 巨化集团公司 | Process and gas-film air tower for treating hydrazine contained sewage generated in production of azodimethylamide |
| CN1513771A (en) * | 2002-12-31 | 2004-07-21 | 中国石油化工股份有限公司 | Electrolytic treatment method of azodicarbonamide foaming agent waste water |
| KR20040085542A (en) * | 2003-03-31 | 2004-10-08 | 대한민국(부경대학교 총장) | Removal measure of Circulated Sequencing Batch Reactor with media containing zeolite for organic matters, nitrogen and phosphorus removal in sewage and waste waters |
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2006
- 2006-06-12 CN CNB2006100853508A patent/CN100410193C/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1396126A (en) * | 2001-07-16 | 2003-02-12 | 巨化集团公司 | Process and gas-film air tower for treating hydrazine contained sewage generated in production of azodimethylamide |
| CN1513771A (en) * | 2002-12-31 | 2004-07-21 | 中国石油化工股份有限公司 | Electrolytic treatment method of azodicarbonamide foaming agent waste water |
| KR20040085542A (en) * | 2003-03-31 | 2004-10-08 | 대한민국(부경대학교 총장) | Removal measure of Circulated Sequencing Batch Reactor with media containing zeolite for organic matters, nitrogen and phosphorus removal in sewage and waste waters |
| US7033503B2 (en) * | 2004-03-18 | 2006-04-25 | Korean Institute Of Science And Technology | Municipal wastewater treatment apparatus and process with a continuous feed and cyclic aeration |
| CN1657428A (en) * | 2005-01-28 | 2005-08-24 | 江苏江大环境工程有限责任公司 | New comprehensive utilization method of ADC foaming agent condensed mother liquor |
Non-Patent Citations (4)
| Title |
|---|
| A/DAT-IAT工艺处理高浓度氨氮废水的研究. 梁仁闻等.水资源与水工程学报，第17卷第1期. 2006 |
| A/DAT-IAT工艺处理高浓度氨氮废水的研究. 梁仁闻等.水资源与水工程学报，第17卷第1期. 2006 * |
| 生化法处理ADC 发泡剂废水的试验研究. 缪应祺等.水资源保护，第22卷第3期. 2006 |
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