CN104261612B - A kind of containing high salt organic wastewater with difficult degradation thereby novel process device - Google Patents
A kind of containing high salt organic wastewater with difficult degradation thereby novel process device Download PDFInfo
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- CN104261612B CN104261612B CN201410523023.0A CN201410523023A CN104261612B CN 104261612 B CN104261612 B CN 104261612B CN 201410523023 A CN201410523023 A CN 201410523023A CN 104261612 B CN104261612 B CN 104261612B
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/02—Treatment of water, waste water, or sewage by heating
- C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
- C02F1/048—Purification of waste water by evaporation
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/02—Treatment of water, waste water, or sewage by heating
- C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
- C02F1/06—Flash evaporation
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/48—Treatment of water, waste water, or sewage with magnetic or electric fields
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/78—Treatment of water, waste water, or sewage by oxidation with ozone
Abstract
Disclosure is a kind of containing high salt organic wastewater with difficult degradation thereby novel process device, and this device includes plasma sewage disposal and multistage flash evaporation desalination two parts。Apparatus of the present invention can effectively process the waste water containing hardly degraded organic substance and high concentration salinity that current chemical industry especially Fine Chemical produces, the advantages such as treatment effeciency is high, equipment cost is low, operating cost is low and stable。This device also solves the thermal loss problem produced in Cement Composite Treated by Plasma waste water process and follow-up high-salt wastewater is difficult to the problem of biochemical treatment, has a good application prospect and high using value。
Description
Technical field:
The invention belongs to the preprocessing technical field of wastewater from chemical industry, utilize low temperature plasma and multistage flash evaporation to process the device containing high salt organic wastewater with difficult degradation thereby particularly to a kind of。
Background technology:
High slat-containing wastewater refers to the waste water containing Organic substance and at least mass fraction >=3.5% of total dissolved solidss TDS (TotalDissolvedSolid), including high salt sanitary wastewater and high salt industrial wastewater。Except containing organic contamination beyond the region of objective existence in these waste water, possibly together with substantial amounts of inorganic salt, such as Cl-, SO4 2-, Na+, Ca2+Plasma。The total amount of high salt organic waste water is huge and has the trend increased year by year, if it is not processed before discharge, the soluble inorganic salt of Coal Gas Washing Cycling Water and the toxic organic compound of difficult degradation can cause serious environmental pollution, and soil and surface water, subsoil water are damaged。But brine strength can not be too high in conventional treatment method, it would be highly desirable to the Technology of the high-salt wastewater of development process higher concentration。
Corona discharge plasma is the one of low temperature plasma, owing to its equipment is simple, easy to operate, normal temperature and pressure, treatment effeciency advantages of higher, is widely used in field of environment pollution control。Plasma is under the effect of extra electric field, a large amount of high energy electrons bombardment contaminant molecule that electric discharge produces, make it ionize, dissociate and excite, then the physics of series of complex, chemical reaction have just been caused, complicated macromolecule contaminant is made to be changed into simple small-molecule substance, or make poisonous and harmful substance be transformed into nontoxic or the low evil of low toxicity material, the removal so that pollutant are degraded。Because the averaged electron energy produced after its ionization is at 1-10eV, the chemical reaction that suitably control reaction condition can realize generally being difficult to or speed is very slow becomes very quick。
Multi-stage flash evaporation technology is the shortcoming serious for multiple-effect evaporation fouling and the novel desalting technology that grows up。Raw material haline water passes through preheater, after being heated to certain requirement temperature (maximum allowable operating temperature (M.A.O.T.) 110 DEG C), it is re-introduced in the pressure container lower than the saturated vapor pressure corresponding to haline water (flash chamber), wherein part haline water rapid vaporization generates steam, can obtain fresh water after this part water vapor condensation；Remaining haline water temperature reduces, and continues to be introduced in the flash chamber that another pressure is relatively low and is again evaporated generating the process that steam and steam are condensed。The multiple flash chambers reduced successively by such pressure and temperature are together in series, it is possible to continuous print output fresh water。Multistage flash evaporation desalting technology has that maintenance cost is little, low to the requirement of raw water quality, equipment is simple and reliable, is prone to maximize and long service life, and it is high to produce water quality, available Lowlevel thermal energy and used heat, and the thermal efficiency is advantages of higher relatively。
Need to provide a kind of can efficiently remove the soluble inorganic salt of Coal Gas Washing Cycling Water and the device of the toxic organic compound of difficult degradation simultaneously。
Summary of the invention
It is an object of the invention to provide a kind of containing high salt organic wastewater with difficult degradation thereby novel process new equipment。
The purpose of the present invention is realized by techniques below:
A kind of containing high salt organic wastewater with difficult degradation thereby process device, this device includes board-like dielectric barrier discharge device and Multistage flash evaporator, described board-like dielectric barrier discharge device includes two electrode plate being connected respectively and the gas liquid reaction still being arranged between two electrode plate with ground electrode and high-voltage pulse power source, described battery lead plate is parallel with the liquid level of gas liquid reaction still, and leave certain arcing distance between the battery lead plate and the liquid level of gas liquid reaction still that are connected with high-voltage pulse power source, the liquid outlet end of described gas liquid reaction still is respectively communicated with the fluid inlet end of Multistage flash evaporator and the fluid inlet end of wastewater equalization pond, the liquid outlet end of the fluid inlet end connection wastewater equalization pond of described gas liquid reaction still。This device includes board-like dielectric barrier discharge organic matter degradation part and multistage flash evaporation waste water desalination part。
Described gas liquid reaction still liquid outlet end connects Multistage flash evaporator by No. II pump with flowing water Valve。
The fluid inlet end of described gas liquid reaction still is by No. I pump connection wastewater equalization pond liquid outlet end。
The liquid outlet end of described gas liquid reaction still is by the fluid inlet end of return valve connection wastewater equalization pond。
Above-mentioned gas liquid reaction still be shaped as annular groove-shaped, the water inlet pipe of this gas liquid reaction still is separately positioned on the both sides of gas liquid reaction still and vertical with liquid level with outlet pipe。
Being also equipped with distillate flask and concentrated solution flask on described Multistage flash evaporator, the described concentrated solution in concentrated solution flask flows into the useless liquid storage tank of danger by pipeline。
Described Multistage flash evaporator connection vacuum pump is for being evacuated the flash chamber in Multistage flash evaporator。
Described Multistage flash evaporator controls temperature therein and flow rate of liquid by temperature controller and flow speed controller。
Described Multistage flash evaporator is provided with vacuum meter。
Described regulating reservoir is provided with agitating device。
The embodiment containing high salt organic wastewater with difficult degradation thereby process device most preferred technique scheme of the present invention is as follows:
After sewage initially enters wastewater equalization pond adjustment pH, stirred aeration mix homogeneously by agitating device after, under the effect of No. I pump, enter gas liquid reaction still, high-voltage pulse power source produces, by battery lead plate electric discharge, the hard-degraded substance generation inelastic collision that a large amount of high energy electrons contain with waste water in gas liquid reaction still, energy is converted into the interior energy of ground state molecule, excites, dissociate and a series of processes such as ionization, make waste water be in the state of activation。Open waste water molecular link on the one hand, generate some simple substance atom or monoatomic molecules；Produce substantial amounts of free oxygen, free radical and ozone isoreactivity group on the other hand。The chemical reaction caused by active particle being made up of these monoatomic molecules, free oxygen free radical and ozone etc., complicated macromolecule contaminant in waste water is changed into simple little molecule safe material the most at last, or makes the venomous injurant in waste water be changed into nontoxic material or low toxicity low pest matter removal so that pollutant are degraded。In gas liquid reaction still, reacted waste water is partly into Multistage flash evaporator via No. II pump and deviates from salinity, enters wastewater equalization pond in part through reflux pipe。The ratio of backflow and water outlet is by the flowing water Valve on No. II pump and water outlet and reflux pipe, return valve synergic adjustment, and then controls sewage hydraulic detention time in gas liquid reaction still and response time。Waste water after Low Temperature Plasma Treating enters Multistage flash evaporator。Flash chamber in Multistage flash evaporator is evacuated after starting by water circulating type vacuum pump, utilizes the startup time of the built-in vacuum meter of Multistage flash evaporator and water circulating type vacuum pump to control the vacuum of Multistage flash evaporator simultaneously。Control the desalting efficiency of Multistage flash evaporator by the synergy of temperature controller with flow speed controller and slip out ratio。Waste water removes after salinity through Multistage flash evaporator, and concentrated solution enters the useless storage pool of danger through concentrated solution flask, and distillate enters follow-up biochemical treatment facility by distillate flask, carries out biochemical reaction。
The present invention solves, by multistage flash evaporation and being used in combination of low temperature plasma, the significant deficiency that both exist in actual applications, and achieves the efficient improvement containing high salt organic wastewater with difficult degradation thereby, has the advantage that
(1) Low Temperature Plasma Treating is crossed in waste water journey, has energy to be greatly used to heated waste water so that the temperature of waste water raises so that low temperature plasma exists high energy consumption, inefficient problem in actual applications always。And pre-for waste water calorific value is seethed with excitement by multistage flash evaporation due to needs, observable index is too high is difficult in actual waste water desalination to use。In combination with rear perfectly solve each leisure actually used shortcoming, and improve energy utilization efficiency, decrease the energy loss in waste water treatment process。(by reality test and calculating, both are used in combination the energy expenditure that can reduce multistage flash evaporation about 55%)。
(2) in Low Temperature Plasma Treating process, new gas liquid reaction still is employed so that treatment effect is more efficient, and course of reaction is more easy to control。Currently used board-like reactor be shaped as rectangle channel-shaped, water inlet and outlet are opened on the sidewall of rectangular channel, it is the level of state with liquid level, the intake-outlet when flow velocity is relatively low is not because being filled with the relation of stream, it is easily accessible air, thus forming stream of pulses so that the liquid in board-like reactor is readily formed " short stream " so that treatment effect reduces and unstable。Board-like reactor is due to the projection of rectangular channel corner simultaneously, is readily formed marginal discharge when plasma discharge so that discharge uneven, reduces treatment effect。The present invention design novel gas-liquid reactor be shaped as annular groove-shaped, water inlet pipe and outlet pipe are separately positioned on gas liquid reaction still both sides, and with liquid level in vertical state, can effectively prevent gas from entering intake-outlet, and it is shaped as annular groove-shaped due to reactor, can effectively suppress the formation of " short stream ", it is ensured that stablizing for the treatment of effect。The reactor of annular groove-shaped does not have the projection of rectangular channel corner, it is therefore prevented that the generation of marginal discharge in discharge process, it is possible to effectively improve treatment effect。
(3) removal efficiency of waste water salinity can be reached more than 99% by multistage flash evaporation, and the salinity of distillate, lower than 10mg/L, completely solves the adverse effect that salinity processes for waste water subsequent biochemical。
(4) due to the existence of volatile organisms a large amount of in waste water so that multistage flash evaporation is difficult to large-scale application in organic waste water demineralizing。But in the waste water after Low Temperature Plasma Treating, content of organics reduces, and the volatile organism of many macromole is hydrolyzed so that the multistage flash evaporation application in organic wastewater desalination field is greatly improved。
Accompanying drawing illustrates:
Fig. 1 is the structure chart containing high salt organic wastewater with difficult degradation thereby novel process device。
Fig. 2 is the three-view diagram (A is front view, and B is side view, and C is top view) of gas liquid reaction still。
Detailed description of the invention:
As shown in Figure 1, a kind of containing high salt organic wastewater with difficult degradation thereby process device, this device includes board-like dielectric barrier discharge device and Multistage flash evaporator 13, described board-like dielectric barrier discharge device includes two electrode plate 5 being connected respectively and the gas liquid reaction still 4 being arranged between two electrode plate with ground electrode 6 and high-voltage pulse power source 7, described battery lead plate 5 is parallel with the liquid level of gas liquid reaction still 4, and leave certain arcing distance between the battery lead plate 5 and the liquid level of gas liquid reaction still 4 that are connected with high-voltage pulse power source 7, the liquid outlet end of described gas liquid reaction still 4 connects Multistage flash evaporator 13 by No. II pump 8 with flowing water Valve 11, the liquid outlet end of described gas liquid reaction still 4 connects the fluid inlet end of Multistage flash evaporator 13 by No. II pump 8 with flowing water Valve 11, the liquid outlet end of described gas liquid reaction still 4 connects the fluid inlet end of wastewater equalization pond 1 also by return valve 9；The fluid inlet end of described gas liquid reaction still 4 connects the liquid outlet end of wastewater equalization pond 1 by No. I pump 3。Described gas liquid reaction still 4 be shaped as annular groove-shaped, the water inlet pipe 19 of this gas liquid reaction still 4 is separately positioned on the both sides of gas liquid reaction still 4 and vertical with liquid level with outlet pipe 20。Being also equipped with distillate flask 15 and concentrated solution flask 16 on described Multistage flash evaporator 13, the described concentrated solution in concentrated solution flask 16 flows into the useless liquid storage tank 17 of danger by pipeline。Described Multistage flash evaporator 13 connects vacuum pump 14 for being evacuated by the flash chamber in Multistage flash evaporator 13。Described Multistage flash evaporator 14 controls temperature therein and flow rate of liquid by temperature controller 11 and flow speed controller 12, and described Multistage flash evaporator 13 is provided with vacuum meter 18 for showing the vacuum in Multistage flash evaporator 13。Described regulating reservoir 1 is provided with agitating device 2。Described battery lead plate 5 is aluminum electrode plate。
Assembly of the invention embodiment is as follows:
Sewage initially enters after wastewater equalization pond 1 regulates pH, stirred aeration mix homogeneously by agitating device 2 after, under the effect of No. I pump 3, enter gas liquid reaction still 4, high-voltage pulse power source 7 produces, by battery lead plate 5 electric discharge, the hard-degraded substance generation inelastic collision that a large amount of high energy electrons contain with waste water in gas liquid reaction still 4, energy is converted into the interior energy of ground state molecule, excites, dissociate and a series of processes such as ionization, make waste water be in the state of activation。Open waste water molecular link on the one hand, generate some simple substance atom or monoatomic molecules；Produce substantial amounts of free oxygen, free radical and ozone isoreactivity group on the other hand。The chemical reaction caused by active particle being made up of these monoatomic molecules, free oxygen free radical and ozone etc., complicated macromolecule contaminant in waste water is changed into simple little molecule safe material the most at last, or makes the venomous injurant in waste water be changed into nontoxic material or low toxicity low pest matter removal so that pollutant are degraded。In gas liquid reaction still 4, reacted waste water is partly into Multistage flash evaporator 13 via No. II pump 8 and deviates from salinity, enters wastewater equalization pond 1 in part through reflux pipe。The ratio of backflow and water outlet is by the flowing water Valve 10 on No. II pump 8 and water outlet and reflux pipe, return valve 9 synergic adjustment, and then controls sewage hydraulic detention time in gas liquid reaction still 4 and response time。Waste water after Low Temperature Plasma Treating enters Multistage flash evaporator 13。Flash chamber in Multistage flash evaporator 13 is evacuated after starting by water circulating type vacuum pump 14, utilizes the startup time of the built-in vacuum meter of Multistage flash evaporator 13 18 and water circulating type vacuum pump 14 to control the vacuum of Multistage flash evaporator 13 simultaneously。Control the desalting efficiency of Multistage flash evaporator 13 by the synergy of temperature controller 11 with flow speed controller 12 and slip out ratio。Waste water is after Multistage flash evaporator 13 removes salinity, and concentrated solution enters the useless storage pool 17 of danger through concentrated solution flask 16, and distillate enters follow-up biochemical treatment facility by distillate flask 15, carries out biochemical reaction。Described biochemical treatment facility is existing consistent conventional equipment, including anaerobic tower, one-level biochemistry pool, secondary biochemical pond, coagulative precipitation tank and sand filter。
It is as shown in the table that Jiangsu manufacturer produces waste water quality:
| pH | COD(mg/L) | Salinity | TAIC(mg/L) |
| 3 | 25440 | 10.2% | 1703 |
After apparatus of the present invention process, COD is reduced to 7500mg/L, TAIC and is reduced to 85mg/L, and after subsequent biochemical system processes, COD is at below 500mg/L, it is possible to stable effectively up to standard。
Claims (9)
1. one kind processes device containing high salt organic wastewater with difficult degradation thereby, it is characterized in that this device includes board-like dielectric barrier discharge device and Multistage flash evaporator, described board-like dielectric barrier discharge device includes two electrode plate being connected respectively and the gas liquid reaction still being arranged between two electrode plate with ground electrode and high-voltage pulse power source, described battery lead plate is parallel with the liquid level of gas liquid reaction still, the liquid outlet end of described gas liquid reaction still is respectively communicated with the fluid inlet end of Multistage flash evaporator and the fluid inlet end of wastewater equalization pond, the liquid outlet end of the fluid inlet end connection wastewater equalization pond of described gas liquid reaction still；Described gas liquid reaction still be shaped as annular groove-shaped, the water inlet pipe of this gas liquid reaction still is separately positioned on the both sides of gas liquid reaction still and vertical with liquid level with outlet pipe。
2. according to claim 1 containing high salt organic wastewater with difficult degradation thereby process device, it is characterised in that the liquid outlet end of described gas liquid reaction still connects Multistage flash evaporator by No. II pump with flowing water Valve。
3. according to claim 1 containing high salt organic wastewater with difficult degradation thereby process device, it is characterised in that the fluid inlet end of described gas liquid reaction still is by No. I pump connection wastewater equalization pond liquid outlet end。
4. according to claim 1 containing high salt organic wastewater with difficult degradation thereby process device, it is characterised in that the liquid outlet end of described gas liquid reaction still is by the fluid inlet end of return valve connection wastewater equalization pond。
5. according to claim 1 and 2 containing high salt organic wastewater with difficult degradation thereby process device, it is characterized in that being also equipped with distillate flask and concentrated solution flask on described Multistage flash evaporator, the described concentrated solution in concentrated solution flask flows into the useless liquid storage tank of danger by pipeline。
6. according to claim 1 containing high salt organic wastewater with difficult degradation thereby process device, it is characterised in that described Multistage flash evaporator connection vacuum pump is for being evacuated the flash chamber in Multistage flash evaporator。
7. according to claim 1 containing high salt organic wastewater with difficult degradation thereby process device, it is characterised in that described Multistage flash evaporator controls temperature therein and flow rate of liquid by temperature controller and flow speed controller。
8. according to claim 1 containing high salt organic wastewater with difficult degradation thereby process device, it is characterised in that described Multistage flash evaporator is provided with vacuum meter。
9. according to claim 1 containing high salt organic wastewater with difficult degradation thereby process device, it is characterised in that described regulating reservoir is provided with agitating device。
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| CN104909428B (en) * | 2015-05-14 | 2017-07-28 | 南京大学 | A kind of Ag3PO4/TiO2The device and method of catalyst and low temperature plasma Combined Treatment bio-refractory organic wastewater |
| CN106145522B (en) * | 2016-07-27 | 2018-12-18 | 杭州绿一环保技术有限公司 | A kind of processing method of industrial wastewater |
| CN113104927B (en) * | 2021-03-29 | 2023-03-31 | 成都科衡环保技术有限公司 | Treatment device and treatment method for high-salt-content degradation-resistant organic wastewater |
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| CN101050002A (en) * | 2007-04-04 | 2007-10-10 | 黄会峰 | Method for treating industrial wastewater by low temperature using plasma and treating equipment |
| CN102267739A (en) * | 2011-07-08 | 2011-12-07 | 浙江商达环保有限公司 | Low-temperature plasma waste water treatment device and method |
| CN102372342A (en) * | 2011-09-26 | 2012-03-14 | 厦门大学 | Device for treating rubbish leachate with atmosphere plasma |
| CN102951762A (en) * | 2012-11-16 | 2013-03-06 | 同济大学 | Method and system for preventing scales and improving recycling water quality of saliferous and oily wastewater thermal desalination |
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| DK180104B1 (en) * | 2011-09-14 | 2020-05-04 | Aquasource Technologies Corporation | SYSTEM AND PROCEDURE FOR WATER TREATMENT |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101050002A (en) * | 2007-04-04 | 2007-10-10 | 黄会峰 | Method for treating industrial wastewater by low temperature using plasma and treating equipment |
| CN102267739A (en) * | 2011-07-08 | 2011-12-07 | 浙江商达环保有限公司 | Low-temperature plasma waste water treatment device and method |
| CN102372342A (en) * | 2011-09-26 | 2012-03-14 | 厦门大学 | Device for treating rubbish leachate with atmosphere plasma |
| CN102951762A (en) * | 2012-11-16 | 2013-03-06 | 同济大学 | Method and system for preventing scales and improving recycling water quality of saliferous and oily wastewater thermal desalination |
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