CN104355431A - Device capable of efficiently treating and recycling reverse osmosis concentrated water and high-salt wastewater - Google Patents
Device capable of efficiently treating and recycling reverse osmosis concentrated water and high-salt wastewater Download PDFInfo
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- CN104355431A CN104355431A CN201410638034.3A CN201410638034A CN104355431A CN 104355431 A CN104355431 A CN 104355431A CN 201410638034 A CN201410638034 A CN 201410638034A CN 104355431 A CN104355431 A CN 104355431A
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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
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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
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
- C02F1/441—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by reverse osmosis
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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
- C02F2301/00—General aspects of water treatment
- C02F2301/08—Multistage treatments, e.g. repetition of the same process step under different conditions
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Abstract
The invention relates to a device capable of efficiently treating and recycling reverse osmosis concentrated water and high-salt wastewater. The device comprises a high-salt wastewater collection tank, a primary pre-filter, a primary membrane concentration booster pump, a primary vibration membrane filter and a desalting water tank which are connected with one another by virtue of a pipeline to form a primary recycling unit; a concentrated solution produced by the primary vibration membrane filter is introduced into a primary concentrated solution tank; the primary concentrated solution tank is sequentially connected with a secondary pre-filter, a secondary membrane concentration booster pump and a secondary vibration membrane filter to form a secondary concentration unit; water produced by the secondary vibration membrane filter is introduced into the desalting water tank; the concentrated solution is introduced into a secondary concentrated solution tank; the water produced by the desalting water tank is introduced into a finished water tank by virtue of a reverse osmosis safety filter and a reverse osmosis membrane device; a concentrated solution produced by generating water by virtue of the reverse osmosis membrane device returns to the salt-containing wastewater collecting tank. According to the device, the complex pretreatment process is not required; the measures such as softening water and removing oil of the wastewater are not required; the treatment process is greatly shortened; the investment cost and maintenance cost of the system are lowered.
Description
Technical field
The present invention relates to high slat-containing wastewater process and recycle field, more particularly, relate to the equipment that a kind of reverse osmosis concentrated water and high slat-containing wastewater efficiently process recovery.
Background technology
High-salt wastewater refers to the waste water of saltiness massfraction at least 1%, and this kind of waste water containing high density inorganic salt, hardly degraded organic substance, heavy metal and SS etc., is difficult to carry out a biological disposal upon mostly.Bio-refractory organic pollutant, refer to be decomposed by the microorganisms hourly velocity very slow, decompose halfway organism again, also comprise some organic meta-bolites, this kind of pollutant chemistry good stability, the time existed in the environment is long, and by food chain enrichment, harm humans is healthy.
High slat-containing wastewater mainly comes from the high-salt wastewater that Treatment of Industrial Water reverse osmosis system produces concentrated solution and the production generation of the enterprise such as chemical industry, pharmacy.Reverse osmosis technology obtains in 20 end of the centurys and develops fast, all respects that its application has penetrated into people's life and produced.Reverse osmosis membrane is widely used in the industry industrial water supply fields such as petrochemical complex, electric power, biotechnology, medicine and health care, food engineering, but reverse osmosis membrane system only has the water use efficiency of 70 ~ 80%, make it produce the concentrated solution discharge of 20% ~ 30%, produce a large amount of brine wastes.In addition, along with the fast development of China's industry, the environmental pollution that difficult degradation high salinity waste water brings and harm problem are also more and more serious, directly cause water-mineralizing degree to significantly improve, accelerate salinization, Desertification process, bring serious negative impact to ecotope.
Along with the shortage of water resources, the process of waste water (high saliferous) is recycled and is more and more subject to people's attention, and meanwhile, due to population growth and industrial development, environmental pollution is day by day serious, and the demand of wastewater zero discharge grows with each passing day.
At present, waste water mainly contains two kinds of processing modes: nonbiological method (physics, chemistry) and biological process.Although biological process is both economical wastewater treatment way, due to brine waste supersalinity, seriously inhibit biological activity, be unfavorable for the biochemical treatment of waste water.Therefore, adopt biological treatment high-salt wastewater also not make substantial breakthroughs at present, need further research.
Therefore, the method recycling and realize zero release to high-salt wastewater is still adopt physicochemical method, and the treatment process of current main flow adopts the mode of membrane concentration and evaporation to carry out usually.Because high-salt wastewater is usually along with high suspended matter, high salinity and heavy metal, even sometimes containing petroleum substance etc., concentration and recovery is carried out according to traditional reverse osmosis membrane, then need very complicated pre-treatment, first must except the SS in anhydrating, hardness and oily substance, just can enter reverse osmosis system to process, add complicacy and the processing cost of system so greatly, and, common rolled film usually can only process saltiness lower than 2% waste water, although sea water desalination membrane can process saltiness 3.5% ~ 4.5% waste water, but rolled film is very easy to fouling, inflow requirement is high, difficult in maintenance, equally, adopt the mode of evaporation also need to carry out complicated pre-treatment make into water comparatively cleaning just can carry out evaporation process, usual needs strictly control water inlet SS, COD, oleaginousness, hardness number etc., and directly evaporation potential necessarily consumes a large amount of energy, and economy is poor.
Therefore, the process recycling of the complicated waste water of high salt and zero-discharge technology are the important research topics of of field of Environment Protection always.
Summary of the invention
The technical problem to be solved in the present invention is, provides a kind of reverse osmosis concentrated water and high slat-containing wastewater efficiently to process the equipment of recovery, without the need to carrying out complicated pre-treatment, can realize the treatment process of short route, succinct, economy, zero release.
The technical solution adopted for the present invention to solve the technical problems is: construct the equipment that a kind of reverse osmosis concentrated water and high slat-containing wastewater efficiently process recovery, comprises brine waste collection box, one-level fore filter, one-level membrane concentration topping-up pump, primary vibration membrane filter appts, desalination water tank, once concentration liquid case, secondary fore filter, secondary membrane concentrate topping-up pump, secondary vibration membrane filter appts, secondary concentration liquid case, reverse osmosis membrane apparatus and finished product water tank;
Adopt pipeline to connect between brine waste collection box, one-level fore filter, one-level membrane concentration topping-up pump, primary vibration membrane filter appts, desalination water tank, form one-level recovery unit; The concentrated solution that primary vibration membrane filter appts produces enters once concentration liquid case, once concentration liquid case concentrates topping-up pump with secondary fore filter, secondary membrane successively and secondary vibration membrane filter appts forms secondary concentration unit, secondary vibration membrane filter appts produces water and enters desalination water tank, and concentrated solution enters secondary concentration liquid case; Produce water in desalination water tank and enter finished product water tank through reverse osmosis cartridge filter and reverse osmosis membrane apparatus again, the concentrated solution that reverse osmosis membrane apparatus produces water is back in brine waste collection box.
In such scheme, described primary vibration membrane filter appts and secondary vibration membrane filter appts comprise filtering unit, torsion connecting rod, vibrating disk, dither motor, frame, pipe connecting, Controlling System composition, filtering unit is stacked reverse osmosis, filtering unit is connected to vibrating disk by torsion connecting rod, dither motor is fixed on vibrating disk, the vibration passing that motor rotation produces is to vibrating disk, and vibrating disk transfers vibrations to torsion connecting rod, produces resonance.
In such scheme, the operating pressure of described primary vibration membrane filter appts is between 2.5MPa ~ 3.5MPa, and the operating pressure of described secondary vibration membrane filter appts is between 4.0MPa ~ 5.5MPa.
In such scheme, described secondary concentration liquid case also connects evaporation and crystallization system, and evaporation and crystallization system comprises wastewater feed unit, waste water circulation unit, heat exchange and hot supplementary units and crystal salt filtering unit;
Described wastewater feed unit comprises the sewage collecting box, waste water service pump, fore filter and the auxiliary interchanger that adopt pipeline to connect successively; The wastewater outlet of auxiliary interchanger is connected on waste water circulation unit supervisor;
Described waste water circulation unit comprises the flash tank and recycle pump that adopt pipeline to connect, and the outlet pipe of described recycle pump sets gradually concentrated solution return and charging interface, is connected to crystal salt recovery unit and auxiliary interchanger respectively;
Described heat exchange and hot supplementary units comprise vapour compressor, main heat exchanger and steam and supplement pipe, described auxiliary exchanger heat medium entrance is connected with the vapour outlet of main heat exchanger secondary, described vapour compressor import connects the outlet of flash tank secondary steam, the outlet of vapour compressor is connected to the secondary steam import of described main heat exchanger, main heat exchanger is arranged the external steam in road and supplement pipe, and condensate return mouth is set;
Described crystal salt filtering unit comprises crystal salt separator, and the import of described crystal salt separator connects the concentrated solution return of the outlet pipe of recycle pump, and crystal salt separator outlet is connected to sewage collecting box.
In such scheme, described auxiliary interchanger adopts plate-type heat exchanger.
In such scheme, described flash tank material selection glass steel or stainless steel applied corrosion resistant lining, the pump around circuit pipe in it is immersion.
In such scheme, the wastewater streams passage flow duct of described main heat exchanger adopts chevron shaped plate.
Implement the equipment that reverse osmosis concentrated water of the present invention and high slat-containing wastewater efficiently process recovery, there is following beneficial effect:
(1) the present invention does not need complicated pretreatment technology, without the need to softening waste water, except wet goods measure, substantially reducing processing technological flow, reducing system investments cost and maintenance cost;
(2) the high-frequency vibration membrane filtration system of the present invention's employing, its high-frequency vibration principle substantially increases membrane filtration efficiency, reduces film dirt simultaneously and blocks up the tendency with fouling, enhance the work-ing life of film;
(3) native system does not need to add a large amount of chemical agents as traditional technology, and waste water can enter membrane filtration system through simple filtration;
(4) due to the raising of filtration efficiency, operating pressure and energy consumption comparatively conventional film equipment reduce by more than 30%; Present invention process flow process is short, decreases equipment, thus saves occupation area of equipment.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the invention will be further described, in accompanying drawing:
Fig. 1 is the schematic diagram that reverse osmosis concentrated water of the present invention and high slat-containing wastewater efficiently process the equipment of recovery;
Fig. 2 is the schematic diagram of evaporation and crystallization system.
Embodiment
In order to there be understanding clearly to technical characteristic of the present invention, object and effect, now contrast accompanying drawing and describe the specific embodiment of the present invention in detail.
As shown in Figure 1, the equipment that reverse osmosis concentrated water of the present invention and high slat-containing wastewater efficiently process recovery comprises brine waste collection box 101, one-level fore filter 102, one-level membrane concentration topping-up pump 103, primary vibration membrane filter appts 104, desalination water tank 105, once concentration liquid case 106, secondary fore filter 107, secondary membrane concentrate topping-up pump 108, secondary vibration membrane filter appts 109, secondary concentration liquid case, reverse osmosis membrane apparatus 112 and finished product water tank.
High slat-containing wastewater enters brine waste collection box 101, then enter one-level fore filter 102 filtering through pipeline and be greater than 150 micron particle things, then primary vibration membrane filter appts 104 is pumped into through one-level membrane concentration topping-up pump 103, the de-salted water produced by primary vibration membrane filter appts 104 enters desalination water tank 105, 104 concentrated solutions produced then enter once concentration liquid case 106, in once concentration liquid case 106, concentrated solution enters secondary fore filter 107 filtering macrobead thing through pipeline, then concentrate topping-up pump 108 by secondary membrane and pump into secondary vibration membrane filter appts 109, the de-salted water that secondary vibration membrane filter appts 109 produces enters desalination water tank 105, in desalination water tank 105, de-salted water enters reverse osmosis cartridge filter 110 through pipeline, then reverse osmosis unit 112 is pumped into through reverse osmosis high-pressure pump 111, reverse osmosis unit 112 product water delivers to reuse water water spot or product water tank, the concentrated solution that reverse osmosis unit 112 produces flow to sewage collecting box 101 by back of pipeline.
One-level fore filter 102 and secondary fore filter 107 filter member material adopt duplex stainless steel 2501, and flow rate control is at 10m/h, and filtering accuracy is 150 microns, is mainly used in large granular impurity in filtering water.
One-level membrane concentration topping-up pump 103 and secondary membrane concentrate the corrosion-resistant duplex stainless steel 2507 of overcurrent material selection of topping-up pump 108, adopt pressure of multistage vertical centrifugal pump.
Primary vibration membrane filter appts 104 and secondary vibration membrane filter appts 109 comprise filtering unit, torsion connecting rod, vibrating disk, dither motor, frame, pipe connecting, Controlling System.Wherein, filtering unit is stacked reverse osmosis, adopts open runner design, and width of flow path is 2mm, and filtering membrane is reverse osmosis diaphragm, and material is ESPA, and its ratio of desalinization is usually 90% ~ 95%.Filtering unit is connected to vibrating disk by torsion connecting rod, dither motor is fixed on vibrating disk, when electrical power operates, the vibration (its vibrational frequency can adopt frequency transformer to regulate motor) of 50 ~ 60 times per second can be produced, amplitude is 2mm, the vibration passing that motor rotation produces is to vibrating disk, vibrating disk transfers vibrations to torsion connecting rod, produce resonance, such filtering unit also can follow generation high-frequency vibration, vibrate and produce shearing action on film surface, effectively can improve the filtration efficiency of film, prevent the dirty stifled and fouling in film surface simultaneously.
The operating pressure of primary vibration membrane filter appts 104 between 2.5MPa ~ 3.5MPa, feed water flow speed control built in 2 ~ 3m/s, operating flux 20L/ (m
2h), its ratio of desalinization is about 90%, and the rate of recovery is 55% ~ 75%.Concentrated solution saltiness (wt%) after once concentration, usually 4.5% ~ 5.5%, sets its rate of recovery according to the height of waste water saltiness usually.
The operating pressure of secondary vibration membrane filter appts 109 is between 4.0MPa ~ 5.5MPa, and feed water flow speed control is built in 2 ~ 3m/s, and operating flux is 15L/ (m
2h), the further concentration and recovery of concentrated solution produced by secondary vibration membrane filter appts 109 pairs of primary vibration membrane filter apptss 104, its rate of recovery can reach 50%; Reclaim through two-stage, the recovery of the waste water of system can up to 90% ~ 95%.The concentrated solution of secondary discharge drains into secondary concentration liquid case, and the saltiness (wt%) of secondary concentration liquid is usually 8.5% ~ 9.5%, and secondary concentration liquid can take the mode process of evaporating, and realizes wastewater zero discharge.
Be illustrated in figure 2 the evaporation and crystallization system be connected with secondary concentration liquid case, comprise wastewater feed unit, waste water circulation unit, heat exchange and hot supplementary units and crystal salt filtering unit.
Wastewater feed unit comprises the sewage collecting box 201, waste water lifting pump 202, fore filter 203 and the auxiliary interchanger 204 that adopt pipeline to connect successively; The wastewater outlet of auxiliary interchanger 204 is connected on waste water circulation unit supervisor.The corrosion-resistant duplex stainless steel 2501 of its overcurrent material selection of waste water lifting pump 202.Its filtering accuracy of fore filter 203 is 100 microns, and flow velocity is less than 10m/h, and the corrosion-resistant duplex stainless steel 2501 of filtering net material selection, its major function is the large particulate matter in filtering waste water.Auxiliary interchanger 204 adopts plate-type heat exchanger, and its plate material adopts wear-resistant, corrosion-resistant, acidproof high molybdenum alloy Al-6XN, is designed to maximum flow velocity and shearing rate in auxiliary interchanger 204, increases heat transfer efficiencies and reduce scale formation with this; Secondary steam becomes condensation water recovery and use after auxiliary interchanger 204.
Waste water circulation unit comprises the flash tank 205 and recycle pump 206 that adopt pipeline to connect, and the outlet pipe of recycle pump 206 sets gradually concentrated solution return and charging interface, is connected to crystal salt recovery unit and auxiliary interchanger 204 respectively.Its overcurrent material selection of recycle pump 206 is wear-resistant, corrosion-resistant, acidproof high molybdenum alloy Al-6XN; Its circular flow is 200 ~ 250 times of feed flow.Flash tank 205 material selection glass steel or stainless steel applied corrosion resistant lining, the pump around circuit pipe in it adopts immersion design, after the superheated water like this containing a large amount of saturation steam enters flash tank 205, avoids because constantly boiling produces a large amount of water smoke and foam.
Heat exchange and hot supplementary units comprise vapour compressor 208, main heat exchanger 207 and steam and supplement pipe 210, the vapour outlet that auxiliary interchanger 204 thermal medium inlet and main heat exchanger are 207 2 times is connected, vapour compressor 208 import connects the outlet of flash tank 205 secondary steam, the outlet of vapour compressor 208 is connected to the secondary steam import of main heat exchanger 207, main heat exchanger 207 is arranged the external steam in road and supplement pipe 210, and condensate return mouth is set.
Its waste water of main heat exchanger 207 adopts and rises film and falling liquid film design, and wastewater streams passage flow duct adopts chevron shaped plate, to greatest extent turbulization, promotes interchanger heat exchange efficiency, avoids fouling of heat exchangers; Main heat exchanger 207 plate material selection height molybdenum alloy Al-6XN, control its Inlet and outlet water temperature difference during operation within 3 DEG C, flow rate control, at 3 ~ 6m/s, effectively can avoid fouling; System loss heat is supplemented by external vapour pipe, and usual thermosteresis is about 4% ~ 7%.Supplementary steam needs a set of independently system being introduced into main heat exchanger 207 inside.Clean (heat supply) end of main heat exchanger 207, is divided into 2 series, is called: process steam series and supplementary steam series.Dirt (low temperature) end of main heat exchanger 207 is independently systems, and sewage circulates at this place, and cleaning end is a public entirety with dirty end.
One-stage centrifugal vapour compressor 208 selected by vapour compressor 208, and it contacts material with steam be 316L.
Crystal salt filtering unit comprises crystal salt separator 209, and the import of crystal salt separator 209 connects the concentrated solution return of the outlet pipe of recycle pump 206, and crystal salt separator 209 outlet is connected to sewage collecting box 201.
The heat exchanger of the vaporizer that the present invention adopts is arranged on evaporating pot outside.Do not have biofilm to fall stream pipe or other elements in evaporating pot inside.So there is no necessity enter in tank and carry out keeping in repair or maintenance work, this just makes the maintenance of equipment be very easy to.Because heat exchanger is external placed type, tank body just can make of glass reinforced plastic, and this greatly reduces the material requirement to evaporation tank body.
Flash tank 205 inside of the present invention employs submerged boiling technique, and a flash tank 205 completes vaporizer and the work of two, crystallizer.Different with other MVR vaporizers, in flash tank 205, do not need salt and suspended solid material to remove.In addition, submerged boiling technique, decreases the water smoke of compressed vapour system or leaving over of foam to greatest extent, and this technique can complete and not need the large-scale flash tank 205 of other type of evaporator in very little tank body.
The flash tank 205 that the present invention adopts adopts high flow rate circulation technology, and this is also the unique distinction of this system.When vaporizer and crystallizer system are run, high flow rate recirculation water pump, makes water circulate between flash tank 205 and heat exchanger, and makes the heat transfer efficiencies that system keeps higher.This high flow rate process, produces mechanical friction, makes heat exchanger system surface not produce salt crust.(the salt crystalloid in ie in solution is sent into interchanger by water pump, washes away interchanger disc in heat transfer process, thus realizes clean object.)
The flash tank 205 that the present invention adopts can be applicable to high TSS, the high operating mode containing organism, high COD and high saliferous.When other system easily blocks and loses heat-exchange capacity, this system can normally be run.
The working process of evaporation and crystallization system of the present invention is as follows:
Waste water is collected by sewage collecting box 201, and through waste water lifting pump 202 by after fore filter 203, waste water carries out thermal pretreatment through auxiliary heat exchanger and is transported in the recycle system, after main heat exchanger 207 heat exchange, enter flash tank 205.Waste water enters main heat exchanger 207 through the large discharge of recycle pump 206 than in circulation from flash tank 205, superheated water (containing a large amount of steam in water) is formed after heat exchange, superheated water is circulated to flash tank 205, produce a large amount of secondary steam, steam is drawn into vapour compressor 208 from flash tank 205 top, improve temperature after being compressed by vapour compressor 208, enter main heat exchanger 207 and carry out heat exchange with waste water.
Dirty waste water is acted on by recycle pump 206 and enters in advance-heat exchanger from flash tank 205 separate chamber and then enter flash tank 205 separate chamber.Water in this recycle system is designed to maximum flow velocity and shearing rate in auxiliary interchanger 204, increases heat transfer efficiencies and reduce scale formation with this.In addition recirculated water fail to be convened for lack of a quorum be closed in the boiling of submerged condition under, this condition slow down boiling, thus scaling, in auxiliary interchanger 204, specific waste water flash-off of steam is entered flash tank 205.
The steam produced after the flash distillation of flash tank 205 separation vessel internal recycle waste water is compressed intensification by vane type vapour compressor 208.Vapour compressor 208 is by the intensification of water vapor, boosting, and then water vapour is sent to the cleaning end of auxiliary heat exchanger.At auxiliary internal heat exchanger, its latent heat is passed to the sewage of circulation by the steam of high temperature and high pressure by disc, vapor condenses becomes supersaturation water.
Supersaturation phlegma is transferred to auxiliary interchanger 204 from main heat exchanger 207 by air compressor, and water inlet preheats by this auxiliary interchanger 204, and uses water cooling.Thermosteresis is 4-7% under normal circumstances, and additional heat and initial start time institute heat requirement can be provided by steam or electricity.Supplementary steam or heat source liquid need a set of independently system being introduced into main heat exchanger 207 inside.Clean (heat supply) end of main heat exchanger 207, is divided into 2 series, is called: process steam series and supplementary steam series.Dirt (low temperature) end of main heat exchanger 207 is independently systems, and sewage circulates at this place, and cleaning end is a public entirety with dirty end.
When the system is operated, circulating sewage is concentrated, and steam discharges and removed by gas blower in flash tank 205.Owing to there being the sewage newly added, in flash tank 205, liquid level keeps stable.The character of thermal source thing and waste water determines the degree that sewage can be concentrated.Remove and control the degree of enrichment that disturbing flow always can make concentrated sewage keep maximum.
Reverse osmosis unit is used for refining further the product water of tympanum filtering system, reverse osmosis unit operating pressure between 1.5MPa ~ 2.0MPa, feed water flow speed control built in 2 ~ 3m/s, operating flux 22L/ (m2h), its ratio of desalinization is about 97%, and the rate of recovery is 75% ~ 80%.Within making its saltiness be reduced to 200mg/L, make it reach higher standards for industrial water usage, the concentrated solution that common reverse osmosis produces is back to sewage collecting box.
The present invention is that the reverse osmosis concentrated water that cannot process further conventional roll reverse osmosis membrane and Halite water process and recycle, the saltiness of usual reverse osmosis concentrated water is at 3000mg/L ~ 6000mg/L, traditional coiled film can be adopted once to reclaim, recyclable 60% ~ 75%, the concentrated solution saltiness produced after conventional film reclaims is 1.2% ~ 2%, according to traditional coiled film, then cannot effectively concentrate and recycle, tympanum filtering system of the present invention can be taked to carry out concentration and recovery utilization, adopt method of the present invention can reclaim the concentrated solution of 80% ~ 90% further, so far, the Water Sproading utilization ratio that system can be made total reaches 95% ~ 98%.And the industry such as electric power, chemical industry, medicine directly can produce the high slat-containing wastewater of 1.5% ~ 6%, adopt conventional rolled film concentrated cost too high, and film easily dirty stifled and fouling, adopt method of the present invention direct for high-salt wastewater concentration and recovery can be utilized, recovery utilization rate can reach 50% ~ 90%, and residue concentrated solution then can take spontaneous evaporation or other evaporation modes to realize zero release.
Present invention also offers a specific embodiment as follows:
Choose certain power plant desulfurization waste water and change reverse osmosis concentrated water, ion exchange regenerant waste water mixing water, wherein desulfurization wastewater 18m between waterwheel
3/ hr, changes water plant effluent 4m
3/ hr, enters native system after both mixing and amounts to 22m
3/ hr.
Comprehensive high-salt wastewater saltiness is 2500mg/L, TSS be 70mg/L, COD is 95; After the process of primary vibration film, reclaim waste water 12m
3/ hr, product water saltiness TDS are 2891mg/L, TSS be ~ 0, COD is 10.04; The concentrated solution that primary vibration film device produces is 10m
3/ hr, concentrated solution saltiness is 51910.98mg/L, COD be 198.84, TSS is 155.55mg/L; Primary vibration film operating pressure is 3.45MPa, and the rate of recovery is 55%.Detailed water quality sees the following form:
Water quality after table 1 raw water quality and the process of primary vibration film
The concentrated solution that primary vibration film device produces is 10m
3/ hr, concentrated solution saltiness is 51910.98mg/L, COD be 198.84, TSS is 155.55mg/L; After the process of secondary vibration film device, product water saltiness TDS is 6191.79mg/L, TSS be ~ 0, COD is 21.04; The concentrated solution that secondary vibration film device produces is 5m
3/ hr, concentrated solution saltiness is 97630.18mg/L, COD be 376.66, TSS is 311.10mg/L; Primary vibration film operating pressure is 6.21MPa, and the rate of recovery is 50%.
Water quality after the process of table 2 secondary vibration film
The de-salted water that tympanum device produces amounts to 17m
3/ hr, after reverse osmosis unit process, saltiness is 98.15mg/L, COD be 0.33, TSS is ~ 0.
Water quality after table 3 reverse osmosis membrane processing
By this example, a kind of reverse osmosis concentrated water of the present invention and high slat-containing wastewater efficiently process has good adaptability with the method and apparatus of reuse, realize the high recovery utilization rate of high-salt wastewater, comprehensive recovery is 77%, and when for former water supersalinity, high rigidity, high SS, high COD, without the need to the pre-treatment of complexity, the high reclamation rate of high-salt wastewater can be realized.
By reference to the accompanying drawings embodiments of the invention are described above; but the present invention is not limited to above-mentioned embodiment; above-mentioned embodiment is only schematic; instead of it is restrictive; those of ordinary skill in the art is under enlightenment of the present invention; do not departing under the ambit that present inventive concept and claim protect, also can make a lot of form, these all belong within protection of the present invention.
Claims (7)
1. a reverse osmosis concentrated water and high slat-containing wastewater efficiently process the equipment of recovery, it is characterized in that, comprise brine waste collection box, one-level fore filter, one-level membrane concentration topping-up pump, primary vibration membrane filter appts, desalination water tank, once concentration liquid case, secondary fore filter, secondary membrane concentrate topping-up pump, secondary vibration membrane filter appts, secondary concentration liquid case, reverse osmosis membrane apparatus and finished product water tank;
Adopt pipeline to connect between brine waste collection box, one-level fore filter, one-level membrane concentration topping-up pump, primary vibration membrane filter appts, desalination water tank, form one-level recovery unit; The concentrated solution that primary vibration membrane filter appts produces enters once concentration liquid case, once concentration liquid case concentrates topping-up pump with secondary fore filter, secondary membrane successively and secondary vibration membrane filter appts forms secondary concentration unit, secondary vibration membrane filter appts produces water and enters desalination water tank, and concentrated solution enters secondary concentration liquid case; Produce water in desalination water tank and enter finished product water tank through reverse osmosis cartridge filter and reverse osmosis membrane apparatus again, the concentrated solution that reverse osmosis membrane apparatus produces water is back in brine waste collection box.
2. reverse osmosis concentrated water according to claim 1 and high slat-containing wastewater efficiently process the equipment of recovery, it is characterized in that, described primary vibration membrane filter appts and secondary vibration membrane filter appts comprise filtering unit, torsion connecting rod, vibrating disk, dither motor, frame, pipe connecting, Controlling System composition, filtering unit is stacked reverse osmosis, filtering unit is connected to vibrating disk by torsion connecting rod, dither motor is fixed on vibrating disk, the vibration passing that motor rotation produces is to vibrating disk, vibrating disk transfers vibrations to torsion connecting rod, produces resonance.
3. reverse osmosis concentrated water according to claim 1 and high slat-containing wastewater efficiently process the equipment of recovery, it is characterized in that, the operating pressure of described primary vibration membrane filter appts is between 2.5MPa ~ 3.5MPa, and the operating pressure of described secondary vibration membrane filter appts is between 4.0MPa ~ 5.5MPa.
4. reverse osmosis concentrated water according to claim 1 and high slat-containing wastewater efficiently process the equipment of recovery, it is characterized in that, described secondary concentration liquid case also connects evaporation and crystallization system, and evaporation and crystallization system comprises wastewater feed unit, waste water circulation unit, heat exchange and hot supplementary units and crystal salt filtering unit;
Described wastewater feed unit comprises the sewage collecting box, waste water service pump, fore filter and the auxiliary interchanger that adopt pipeline to connect successively; The wastewater outlet of auxiliary interchanger is connected on waste water circulation unit supervisor;
Described waste water circulation unit comprises the flash tank and recycle pump that adopt pipeline to connect, and the outlet pipe of described recycle pump sets gradually concentrated solution return and charging interface, is connected to crystal salt recovery unit and auxiliary interchanger respectively;
Described heat exchange and hot supplementary units comprise vapour compressor, main heat exchanger and steam and supplement pipe, described auxiliary exchanger heat medium entrance is connected with the vapour outlet of main heat exchanger secondary, described vapour compressor import connects the outlet of flash tank secondary steam, the outlet of vapour compressor is connected to the secondary steam import of described main heat exchanger, main heat exchanger is arranged the external steam in road and supplement pipe, and condensate return mouth is set;
Described crystal salt filtering unit comprises crystal salt separator, and the import of described crystal salt separator connects the concentrated solution return of the outlet pipe of recycle pump, and crystal salt separator outlet is connected to sewage collecting box.
5. reverse osmosis concentrated water according to claim 4 and high slat-containing wastewater efficiently process the equipment of recovery, it is characterized in that, described auxiliary interchanger adopts plate-type heat exchanger.
6. reverse osmosis concentrated water according to claim 4 and high slat-containing wastewater efficiently process the equipment of recovery, it is characterized in that, described flash tank material selection glass steel or stainless steel applied corrosion resistant lining, the pump around circuit pipe in it is immersion.
7. reverse osmosis concentrated water according to claim 4 and high slat-containing wastewater efficiently process the equipment of recovery, it is characterized in that, the wastewater streams passage flow duct of described main heat exchanger adopts chevron shaped plate.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410638034.3A CN104355431A (en) | 2014-11-12 | 2014-11-12 | Device capable of efficiently treating and recycling reverse osmosis concentrated water and high-salt wastewater |
Applications Claiming Priority (1)
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| CN109052502A (en) * | 2018-08-01 | 2018-12-21 | 苏州新众禹环境科技有限公司 | A kind of control system for high-pressure water purifying device |
| CN109111010A (en) * | 2018-10-26 | 2019-01-01 | 陕西燎原净化设备有限公司 | A kind of brine waste processing system and its application method |
| CN111268840A (en) * | 2020-02-25 | 2020-06-12 | 苏州翔铭化工设备有限公司 | Method for recycling and treating salt in waste water of yeast drum |
| CN111410351A (en) * | 2019-01-07 | 2020-07-14 | 湖南军信环保股份有限公司 | Method for treating high-salinity wastewater |
| CN111559818A (en) * | 2020-04-25 | 2020-08-21 | 姚於 | Reverse osmosis salt-containing wastewater evaporator |
| CN113003660A (en) * | 2021-02-07 | 2021-06-22 | 楚天华通医药设备有限公司 | Pharmaceutical water system, purified water preparation device and online active concentrated water recycling module |
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| CN105502783A (en) * | 2015-12-14 | 2016-04-20 | 广东创源节能环保有限公司 | Method and device for achieving wastewater zero discharging through membrane method smoke treatment and wet desulphurization |
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| CN107540139B (en) * | 2016-06-29 | 2020-11-17 | 宝山钢铁股份有限公司 | Recycling treatment system and method for cold rolling wastewater ion exchange strong brine |
| CN109052502A (en) * | 2018-08-01 | 2018-12-21 | 苏州新众禹环境科技有限公司 | A kind of control system for high-pressure water purifying device |
| CN109111010A (en) * | 2018-10-26 | 2019-01-01 | 陕西燎原净化设备有限公司 | A kind of brine waste processing system and its application method |
| CN111410351A (en) * | 2019-01-07 | 2020-07-14 | 湖南军信环保股份有限公司 | Method for treating high-salinity wastewater |
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| CN111559818A (en) * | 2020-04-25 | 2020-08-21 | 姚於 | Reverse osmosis salt-containing wastewater evaporator |
| CN111559818B (en) * | 2020-04-25 | 2022-04-08 | 山东水升华环保设备有限公司 | Reverse osmosis salt-containing wastewater evaporator |
| CN113003660A (en) * | 2021-02-07 | 2021-06-22 | 楚天华通医药设备有限公司 | Pharmaceutical water system, purified water preparation device and online active concentrated water recycling module |
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