CN109534583A - High-salt wastewater concentration systems and method - Google Patents
High-salt wastewater concentration systems and method Download PDFInfo
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- CN109534583A CN109534583A CN201910028250.9A CN201910028250A CN109534583A CN 109534583 A CN109534583 A CN 109534583A CN 201910028250 A CN201910028250 A CN 201910028250A CN 109534583 A CN109534583 A CN 109534583A
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- 239000002351 wastewater Substances 0.000 title claims abstract description 87
- 238000000034 method Methods 0.000 title claims abstract description 36
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 127
- 238000001223 reverse osmosis Methods 0.000 claims abstract description 110
- 239000012141 concentrate Substances 0.000 claims abstract description 31
- 238000009833 condensation Methods 0.000 claims abstract description 27
- 230000005494 condensation Effects 0.000 claims abstract description 27
- 238000002425 crystallisation Methods 0.000 claims abstract description 17
- 230000008025 crystallization Effects 0.000 claims abstract description 17
- 238000011084 recovery Methods 0.000 claims abstract description 15
- 239000000463 material Substances 0.000 claims description 13
- 238000001914 filtration Methods 0.000 claims description 8
- 238000001816 cooling Methods 0.000 claims description 7
- 239000012528 membrane Substances 0.000 claims description 7
- 238000001471 micro-filtration Methods 0.000 claims description 6
- 239000004576 sand Substances 0.000 claims description 6
- 238000011144 upstream manufacturing Methods 0.000 claims description 6
- 229910000593 SAF 2205 Inorganic materials 0.000 claims description 5
- 229910001114 SAF 2507 Inorganic materials 0.000 claims description 5
- 238000005189 flocculation Methods 0.000 claims description 4
- 230000016615 flocculation Effects 0.000 claims description 4
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- 238000006243 chemical reaction Methods 0.000 claims description 3
- 239000003814 drug Substances 0.000 claims description 3
- 239000011521 glass Substances 0.000 claims description 3
- 238000009287 sand filtration Methods 0.000 claims description 3
- 238000004062 sedimentation Methods 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- 239000003795 chemical substances by application Substances 0.000 claims 1
- 150000003839 salts Chemical class 0.000 abstract description 19
- 238000005265 energy consumption Methods 0.000 abstract description 5
- 238000004064 recycling Methods 0.000 description 7
- 238000005260 corrosion Methods 0.000 description 6
- 230000007797 corrosion Effects 0.000 description 6
- 238000010438 heat treatment Methods 0.000 description 6
- 239000007788 liquid Substances 0.000 description 4
- 239000005416 organic matter Substances 0.000 description 4
- 238000009835 boiling Methods 0.000 description 3
- 239000013078 crystal Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000003204 osmotic effect Effects 0.000 description 3
- 239000000047 product Substances 0.000 description 3
- 238000003303 reheating Methods 0.000 description 3
- 229910001220 stainless steel Inorganic materials 0.000 description 3
- 239000010935 stainless steel Substances 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 230000003487 anti-permeability effect Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000010612 desalination reaction Methods 0.000 description 2
- 238000004043 dyeing Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 238000001704 evaporation Methods 0.000 description 2
- 230000008020 evaporation Effects 0.000 description 2
- 238000009776 industrial production Methods 0.000 description 2
- 239000010842 industrial wastewater Substances 0.000 description 2
- 238000005272 metallurgy Methods 0.000 description 2
- 239000012466 permeate Substances 0.000 description 2
- 238000007639 printing Methods 0.000 description 2
- 238000003672 processing method Methods 0.000 description 2
- 239000013535 sea water Substances 0.000 description 2
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 1
- 229910001199 N alloy Inorganic materials 0.000 description 1
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 1
- 229910001566 austenite Inorganic materials 0.000 description 1
- HZUJFPFEXQTAEL-UHFFFAOYSA-N azanylidynenickel Chemical compound [N].[Ni] HZUJFPFEXQTAEL-UHFFFAOYSA-N 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 239000011651 chromium Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 229910017053 inorganic salt Inorganic materials 0.000 description 1
- 238000005374 membrane filtration Methods 0.000 description 1
- 229910052750 molybdenum Inorganic materials 0.000 description 1
- 239000011733 molybdenum Substances 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 238000009738 saturating Methods 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 229910000859 α-Fe Inorganic materials 0.000 description 1
Classifications
-
- 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
-
- 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
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
-
- 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
-
- 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
- C02F1/444—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by ultrafiltration or microfiltration
-
- 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
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
-
- 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
- C02F2001/007—Processes including a sedimentation step
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
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- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
The invention discloses a kind of high-salt wastewater concentration systems and methods, the high-salt wastewater concentration systems include reverse osmosis unit, concentrating tower device and crystallizer, the reverse osmosis unit includes raw water box, reverse osmosis unit, reverse osmosis produced water tank and reverse osmosis concentrated water tank, and the concentrating tower device includes that concentration tower feed exchanger, concentration tower, concentration tower boil heat exchanger, vapor condensation heat-exchange device again.The high-salt wastewater method for concentration includes the following steps, high-salt wastewater is handled through reverse osmosis unit, collects concentrated water respectively and produces water；The concentrated tower feed exchanger of the concentrated water, concentration tower, concentration tower are boiled heat exchanger again and handle to obtain steam and concentrate；The steam is recycled through vapor condensation heat-exchange device；By the concentrate crystallization treatment.The problems such as crystallizer treatment scale is big when the high-salt wastewater concentration systems and method solve high-salt wastewater processing, inorganic salts recovery difficult is big, the rate of recovery is low, reduce cost of investment and operation energy consumption.
Description
Technical field
The present invention relates to technical field of waste water processing, in particular to a kind of high-salt wastewater concentration systems and method.
Background technique
The waste water generated in the industrial productions such as electric power, metallurgy, chemical industry, sea water desalination, printing and dyeing, papermaking have high salinity,
The features such as high organic matter and high rigidity, by its direct emission can serious polluted water resources, the life of present environmental risks and the mankind
Environment.
Currently, be mainly embrane method for the processing method of high slat-containing wastewater decrement, in embrane method again based on hyperfiltration, it
It is to separate hydrone and molecules of salt using the principle of osmotic pressure, reverse osmosis unit produces water recycling and reusing, and reverse osmosis concentration is useless
Water (concentrated water) enters depth concentration systems or is directly entered the recycling that crystal system carries out dissolving salt.
For salt content 5000mg/L or more high-salt wastewater, using reverse osmosis unit to the high-salt wastewater processing after,
Reverse osmosis membrane has 97% or more rejection to each inorganic salts, organic matter, and reverse osmosis concentrated water salt content height, complicated component are unfavorable
The recycling of Yu Shui and dissolving salt.The production scale of industrial wastewater is generally large, and large-scale high-salt wastewater will increase subsequent
The scale of processing equipment increases investment and operating cost, owner is caused to be difficult to bear, and limits the hair of high slat-containing wastewater processing technique
Exhibition and popularization.
Summary of the invention
The purpose of the present invention is to provide a kind of high-salt wastewater concentration systems and method, the high-salt wastewater concentration systems and side
Method can sufficiently improve the inorganic salt concentration in high-salt wastewater, reduce crystallizer treatment scale, improve the purity of crystal salt, reduce
Construction investment.
The present invention is achieved by the following technical solutions:
First aspect present invention provides a kind of high-salt wastewater concentration systems, including reverse osmosis unit, concentrating tower device and knot
Brilliant device；
The reverse osmosis unit includes raw water box, reverse osmosis unit, reverse osmosis produced water tank and reverse osmosis concentrated water tank, described dense
Contracting tower apparatus includes that concentration tower feed exchanger, concentration tower, concentration tower boil heat exchanger, vapor condensation heat-exchange device again；
The raw water box is connect with the reverse osmosis unit, the reverse osmosis unit respectively with reverse osmosis produced water tank and reverse osmosis
Saturating concentrated water case connection, the concentration tower feed exchanger are connect with the reverse osmosis concentrated water tank, the concentration tower feed exchanger,
Concentration tower boils heat exchanger again and vapor condensation heat-exchange device is connect with the concentration tower, the concentration tower feed exchanger for pair
Reverse osmosis concentrated water into the concentration tower heats, and the concentration tower boils heat exchanger to by the concentration tower feed exchanger again
Concentrated water reheat, the vapor condensation heat-exchange device is used for the concentration tower overhead vapours condensing recovery, the crystallizer with
The concentration tower connection, the crystallizer are used for the processed concentrated water crystallization treatment of the concentration tower.
High-salt wastewater concentration systems as described above, the concentration tower are glass steel material concentration tower, inside the concentration tower
Filler is SAF2205 material or SAF2507 material.
High-salt wastewater concentration systems as described above, the concentration tower feed exchanger are also used to after concentration tower processing
Concentrated water cooling processing.
High-salt wastewater concentration systems as described above, the concentrating tower device further include concentration tower feed pump, boil heat exchanger again
Circulating pump and concentration tower concentrated water send pump outside；
The concentration tower feed pump is used to the concentrated water of the reverse osmosis concentrated water tank being pumped into the concentration tower feed exchanger,
It is described to boil heat exchanger circulating pump again and boil heat exchanger, the concentration tower concentrated water again for the concentrate in concentration tower to be pumped into concentration tower
Pump is sent outside for concentrate to be pumped into crystallizer.
High-salt wastewater concentration systems as described above, the water inlet of the reverse osmosis unit are connected with cartridge filter.
High-salt wastewater concentration systems as described above, the water inlet of the cartridge filter is connected with sand filtering device or tubular type is micro-
Filter device；The upstream of the sand filtering device is connected with clarifying basin；The upstream of the tubular type micro-filtration is connected with three headers of reaction.
Second aspect of the present invention provides a kind of high-salt wastewater method for concentration, includes the following steps,
High-salt wastewater is handled through reverse osmosis unit, collect concentrated water respectively and produces water；
The concentrated tower feed exchanger of the concentrated water, concentration tower, concentration tower are boiled into heat exchanger again and handle to obtain steam and dense
Contracting liquid；
The steam is recycled through vapor condensation heat-exchange device；
By the concentrate crystallization treatment.
High-salt wastewater method for concentration as described above, it is described will be before the concentrate crystallization treatment further include:
The concentration tower tower bottom concentrate is handled through the concentration tower feed exchanger cooling.
High-salt wastewater method for concentration as described above, it is described to handle high-salt wastewater through reverse osmosis unit, and collect respectively dense
Before contracting liquid and permeate further include:
The high-salt wastewater is pre-processed, the pretreatment includes following one or more kinds of combined treatment modes,
Medicament softening, flocculation sedimentation, clarifying treatment, sand filtration and tube microfiltration membrane filtering.
High-salt wastewater method for concentration as described above, it is described to handle high-salt wastewater through reverse osmosis unit, before further include:
The high-salt wastewater is handled through cartridge filter.
High-salt wastewater concentration systems of the invention include reverse osmosis unit, concentrating tower device and crystallizer, raw water box and anti-
Permeability apparatus connection, reverse osmosis unit are connect with reverse osmosis produced water tank and reverse osmosis concentrated water tank respectively, concentration tower feed exchanger
Connect with reverse osmosis concentrated water tank, concentration tower feed exchanger, concentration tower boil again heat exchanger and vapor condensation heat-exchange device with concentration
Tower connection, concentration tower feed exchanger are used to heat the reverse osmosis concentrated water for entering the concentration tower, and concentration tower boils heat exchanger again
For reheating to by the concentrated water of concentration tower feed exchanger, vapor condensation heat-exchange device is used to condense concentration tower overhead vapours
Recycling, crystallizer are connect with concentration tower, and crystallizer is used for the concentrated water crystallization treatment in concentration tower, the high-salt wastewater concentration systems
Using the ingenious combination of reverse osmosis unit, concentration tower, when solving high-salt wastewater processing, crystallizer treatment scale is big, inorganic salts return
The problems such as difficulty is big, the rate of recovery is low are received, cost of investment and operation energy consumption are reduced.
High-salt wastewater method for concentration of the invention includes handling high-salt wastewater through reverse osmosis unit, and collect concentrated water respectively
With production water, the concentrated tower feed exchanger of the concentrated water, concentration tower, concentration tower are boiled heat exchanger again and handle to obtain steam and concentration
The steam is recycled by liquid through vapor condensation heat-exchange device, by concentration tower tower bottom concentrate crystallization treatment.Concentrated water passes through concentration
Enter concentrating tower device after the heating of tower feed exchanger to be concentrated, concentrated water by boiling in heat exchanger again in concentration tower in concentration tower
With steam heat-exchanging, it is back to concentration tower after heating, achievees the purpose that heat concentrate, concentration tower overhead vapours is cold by steam
It can be recycled after solidifying heat exchanger condensation, tower bottom concentrate enters crystallizer and carries out crystallization treatment, recycles the salt in concentrate
Point, which uses the combination of reverse osmosis unit, concentration tower and crystallizer, when solving high-salt wastewater processing
The problems such as crystallizer treatment scale is big, inorganic salts recovery difficult is big, the rate of recovery is low, reduce cost of investment and operation energy consumption.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is this hair
Bright some embodiments for those of ordinary skill in the art without creative efforts, can be with root
Other attached drawings are obtained according to these attached drawings.
Fig. 1 is the structural schematic diagram of high-salt wastewater concentration systems provided in an embodiment of the present invention；
Fig. 2 is the flow diagram of high-salt wastewater method for concentration provided in an embodiment of the present invention.
Description of symbols:
1- raw water box；2- reverse osmosis unit；
3- reverse osmosis produced water tank；The reverse osmosis concentrated water tank of 4-；
5- concentration tower feed exchanger；6- concentration tower；
7- concentration tower boils heat exchanger again；8- vapor condensation heat-exchange device；
9- concentration tower feed pump；10- boils heat exchanger circulating pump again；
11- concentration tower concentrated water sends pump outside；12- cartridge filter；
13- feed pump；14- high-pressure pump.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is
A part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art
Every other embodiment obtained without creative efforts, shall fall within the protection scope of the present invention.
In the description of the present invention, it is to be understood that, term " includes " used herein and " having " and they
Any deformation, it is intended that cover it is non-exclusive include, for example, containing the process, method of a series of steps or units, being
System, product or equipment those of are not necessarily limited to be clearly listed step or unit, but may include be not clearly listed or
For the intrinsic other step or units of these process, methods, product or equipment.In the description of the present invention, unless otherwise saying
Bright, " a variety of " are meant that two or more.
The waste water generated in the industrial productions such as electric power, metallurgy, chemical industry, sea water desalination, printing and dyeing, papermaking have high salinity,
The features such as high organic matter and high rigidity, by its direct emission can serious polluted water resources, the life of present environmental risks and the mankind
Environment.
Currently, be mainly embrane method for the processing method of high slat-containing wastewater decrement, in embrane method again based on hyperfiltration, it
It is to separate hydrone and molecules of salt using the principle of osmotic pressure, reverse osmosis unit produces water recycling and reusing, and reverse osmosis concentration is useless
Water (concentrated water) enters depth concentration systems or is directly entered the recycling that crystal system carries out dissolving salt.
For salt content 5000mg/L or more high-salt wastewater, using reverse osmosis unit to the high-salt wastewater processing after,
Reverse osmosis membrane has 97% or more rejection to each inorganic salts, organic matter, and reverse osmosis concentrated water salt content height, complicated component are unfavorable
The recycling of Yu Shui and dissolving salt.The production scale of industrial wastewater is generally large, and large-scale high-salt wastewater will increase subsequent
The scale of processing equipment increases investment and operating cost, owner is caused to be difficult to bear, and limits the hair of high slat-containing wastewater processing technique
Exhibition and popularization.
The part term in the application is explained below, so as to those skilled in the art understand that.
Cartridge filter, also known as accurate filter are generally located on before pressure vessel, to remove 1 degree of turbidity or more thin
Little particulate, to meet requirement of the subsequent handling to water inlet；Sometimes it is also disposed at the end of entire water treatment system, is prevented tiny micro-
Grain (such as broken resin) enters product water.
Reverse osmosis unit is that solvent (usually water) in solution is made to pass through reverse osmosis membrane (or half with enough pressure
Permeable membrane) and it separates, because this process and naturally osmotic is contrary, because referred to herein as reverse osmosis.
Three headers are reacted, including neutralize case, flow tank and flocculation tanks.
SAF2205, a kind of two phase stainless steel of plus nitrogen, by 21% chromium, what 2.5% molybdenum and 4.5% nickel nitrogen alloy were constituted is answered
Formula stainless steel.
SAF2507 is a kind of ferrite austenite (two-phase) stainless steel, have fabulous pitting corrosion, crevice corrosion and
The ability of homogeneous corrosion.
It describes in detail combined with specific embodiments below to high-salt wastewater concentration systems provided by the invention.
Embodiment one:
Fig. 1 is the structural schematic diagram of high-salt wastewater concentration systems provided in an embodiment of the present invention, refering to Figure 1, this
The high-salt wastewater concentration system of embodiment includes reverse osmosis unit, concentrating tower device and crystallizer；The reverse osmosis unit includes original
Water tank 1, reverse osmosis unit 2, reverse osmosis produced water tank 3 and reverse osmosis concentrated water tank 4, the concentrating tower device include that concentration tower charging is changed
Hot device 5, concentration tower 6, concentration tower boil heat exchanger 7, vapor condensation heat-exchange device 8 again；
The raw water box 1 is connect with the reverse osmosis unit 2, the reverse osmosis unit 2 respectively with reverse osmosis produced water tank 3 and
Reverse osmosis concentrated water tank 4 connects, and the concentration tower feed exchanger 5 is connect with the reverse osmosis concentrated water tank 4, the concentration tower into
Expect that heat exchanger 5, the concentration tower boils heat exchanger 7 again and the vapor condensation heat-exchange device 8 is connect with the concentration tower 6, it is described
Concentration tower feed exchanger 5 is used to heat the reverse osmosis concentrated water for entering the concentration tower 6, and the concentration tower boils heat exchanger 7 again
For reheating to by the concentrated water of the concentration tower feed exchanger 5, the vapor condensation heat-exchange device 8 is used for the concentration
6 overhead vapours condensing recovery of tower, the crystallizer are connect with the concentration tower 6, and the crystallizer is used for in the concentration tower
Concentrated water crystallization treatment.
In the present embodiment, industrial high-salt wastewater is introduced into raw water box 1 and is saved, and reverse osmosis produced water tank 3 is used for
It collects reverse osmosis unit treated and produce water, reverse osmosis concentrated water tank 4 treated for collecting reverse osmosis unit 2 concentrated water, this reality
Apply reverse osmosis produced water tank 3 and the preferred plastic material of the material of reverse osmosis concentrated water tank 4 in example.
In the present embodiment, the operating pressure of the reverse osmosis unit 2 is adjustable according to the concentration of high-salt wastewater.
In the present embodiment, the concentration tower feed exchanger 5 is used to heat the concentrated water come out from reverse osmosis concentrated water tank 4,
The concentration tower boils heat exchanger 7 for reheating to by the concentrated water of the concentration tower feed exchanger 5 again, and the steam condenses
Heat exchanger 8 is used for the concentration tower overhead vapours condensing recovery, and the present embodiment is to the concentration tower feed exchanger 5, concentration
Tower boils heat exchanger 7 again and the situation of vapor condensation heat-exchange device 8 is not particularly limited.
High-salt wastewater concentration systems of the invention include reverse osmosis unit, concentrating tower device and crystallizer, raw water box and anti-
Permeability apparatus connection, reverse osmosis unit are connect with reverse osmosis produced water tank and reverse osmosis concentrated water tank respectively, concentration tower feed exchanger
Connect with reverse osmosis concentrated water tank, concentration tower feed exchanger, concentration tower boil again heat exchanger and vapor condensation heat-exchange device with concentration
Tower connection, the concentration tower feed exchanger are used to heat the reverse osmosis concentrated water for entering the concentration tower, and concentration tower boils again to be changed
Hot device is used to reheat to by the concentrated water of concentration tower feed exchanger, and vapor condensation heat-exchange device is used for concentration tower overhead vapours
Condensing recovery, crystallizer are connect with concentration tower, and crystallizer is used for the concentrated water crystallization treatment in concentration tower, high-salt wastewater concentration
System uses the ingenious combination of reverse osmosis unit, concentration tower, and inorganic salts recovery difficult is big when solving high-salt wastewater processing, recycles
The low problem of rate, reduces cost of investment and operation energy consumption.
Further, in this embodiment the concentration tower 6 is glass steel material concentration tower, optionally, the concentration tower 6
Inner stuffing is SAF2205 material or SAF2507 material.Wherein SAF2205 material or SAF2507 material have fabulous resist
The ability of spot corrosion, crevice corrosion and homogeneous corrosion, long service life.
Further, in this embodiment the concentration tower feed exchanger 5 is also used to, to the concentration tower 6, treated
Concentrated water cooling processing.
Further, in this embodiment the concentrating tower device further includes concentration tower feed pump 9, boils heat exchanger circulation again
Pump 10 and concentration tower concentrated water send pump 11 outside；
The concentration tower feed pump 9 is used to for the concentrated water of the reverse osmosis concentrated water tank 4 being pumped into the concentration tower charging heat exchange
Device 5, it is described to boil heat exchanger circulating pump 10 again and boil heat exchanger 7 again for the concentrate in concentration tower 6 to be pumped into concentration tower, it is described dense
Contracting tower concentrated water sends pump 11 outside for concentrate to be pumped into crystallizer.
Further, in this embodiment the water inlet of the reverse osmosis unit is connected with cartridge filter 12, raw water box 13
It is provided with feed pump 14 between the cartridge filter 12, is provided with height between cartridge filter and the reverse osmosis unit 2
Press pump, for will treated that waste water is pumped into reverse osmosis unit 2 through cartridge filter 12.
Further, in the present embodiment, the water inlet of the cartridge filter 12 is connected with sand filtering device or tubular type is micro-
Filter device；The upstream of the sand filtering device is connected with clarifying basin；The upstream of the tubular type micro-filtration is connected with three headers of reaction.
Below for according to the example of the high-salt wastewater concentration systems of the present embodiment progress high-salt wastewater processing:
In certain chemical plant high-salt wastewater concentrating and treating system, two sets of 60m of system configuration3/ h, the rate of recovery 60% it is reverse osmosis,
A set of evaporation capacity is the concentration Tower System of 15t/h, and subsequent technique is the crystallizing evaporator of evaporation capacity 30t/h.
System water inlet 50000 μ s/cm of conductivity, reverse osmosis unit inflow 110m3/ h, the operating pressure of reverse osmosis unit
For 3~7MPa, reverse osmosis unit produces water 66m3/h, conductivity 2000 μ s/cm, reverse osmosis unit concentrated water 44m3/ h, conductivity
120000μs/cm.Reverse osmosis unit produces after water enters reverse osmosis produced water tank and carries out two-pass reverse osmosis processing, and reverse osmosis unit is dense
Water enters concentrating tower device processing.
Reverse osmosis unit concentrated water (44m3/ h, 120000 μ s/cm of conductivity) pass through the concentrated tower charging of concentration tower feed pump
Enter concentration tower after heat exchanger heating to be concentrated, concentrate is boiled by boiling heat exchanger circulating pump again in concentration tower again in concentration tower
In heat exchanger and steam heat-exchanging, concentrated water are back to concentration tower after heating, and concentration tower overhead vapours (15t/h) is changed by steam condensation
It can be recycled after hot device condensation, tower bottom concentrate (29t/h, 220000 μ s/cm of conductivity) is sent outside by concentration tower concentrated water
After pumping concentrated tower feed exchanger cooling, crystallization treatment is carried out into crystallizer, recycles salinity.
Conductivity 50000 μ s/cm, water 110m3The high saline sewage of/h becomes conductivity after present invention processing
The final concentrated water of 220000 μ s/cm, water 29t/h, the whole system rate of recovery reach 73%.It can be seen that the embodiment of the present invention
High-salt wastewater concentration systems can sufficiently improve the salinity in high-salt wastewater, to reduce crystallizer treatment scale, reduce knot
The construction investment of brilliant device.
Embodiment two:
The present embodiment provides a kind of high-salt wastewater method for concentration, comprising the following steps:
S101, high-salt wastewater is handled through reverse osmosis unit, collect concentrated water respectively and produces water；
S102, the concentrated tower feed exchanger of the concentrated water, concentration tower, concentration tower are boiled heat exchanger again and handles to obtain steam
And concentrate；
S103, the steam is recycled through vapor condensation heat-exchange device；
S104, by the concentrate crystallization treatment.
Further, in this embodiment before the tower bottom concentrate crystallization treatment by concentration tower further include: will be described dense
Contracting tower tower bottom concentrate is handled through the concentration tower feed exchanger cooling.
Further, it is described high-salt wastewater is handled through reverse osmosis unit before further include: to high-salt wastewater pre-process,
The pretreatment includes following one or more kinds of combined treatment modes, medicament softening, flocculation sedimentation, clarifying treatment, sand filtration, pipe
Decline membrane filtration.
Further, described to handle high-salt wastewater through reverse osmosis unit, it before further include to the high-salt wastewater through protecting
Pacify filter process, reduces the fouling of reverse osmosis membrane and contaminated probability in reverse osmosis unit.
High-salt wastewater method for concentration of the invention includes handling high-salt wastewater through reverse osmosis unit, and collect concentration respectively
The concentrated tower feed exchanger of the concentrate, concentration tower are boiled heat exchanger processing again, column overhead will be concentrated by liquid and permeate
Steam recycles after the condensation of vapor condensation heat-exchange device, by concentration tower tower bottom concentrate crystallization treatment.Concentrate passes through concentration
Enter concentrating tower device after the heating of tower feed exchanger to be concentrated, concentrate by boiling heat exchanger in concentration tower again in concentration tower
Interior and steam heat-exchanging, is back to concentration tower after heating, concentration tower overhead vapours can return after being condensed by vapor condensation heat-exchange device
It receives and utilizes, tower bottom concentrate enters crystallizer and carries out crystallization treatment, recycles the salinity in concentrate, the high-salt wastewater method for concentration
It is combined using reverse osmosis unit, concentration tower and crystallizer, crystallizer treatment scale is big when solving high-salt wastewater processing, inorganic salts
The problems such as recovery difficult is big, the rate of recovery is low, reduce cost of investment and operation energy consumption.
Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention., rather than its limitations；To the greatest extent
Pipe present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that: its according to
So be possible to modify the technical solutions described in the foregoing embodiments, or to some or all of the technical features into
Row equivalent replacement；And these are modified or replaceed, various embodiments of the present invention technology that it does not separate the essence of the corresponding technical solution
The range of scheme.
Claims (10)
1. a kind of high-salt wastewater concentration systems, which is characterized in that
Including reverse osmosis unit, concentrating tower device and crystallizer；
The reverse osmosis unit includes raw water box, reverse osmosis unit, reverse osmosis produced water tank and reverse osmosis concentrated water tank, the concentration tower
Device includes that concentration tower feed exchanger, concentration tower, concentration tower boil heat exchanger, vapor condensation heat-exchange device again；
The raw water box is connect with the reverse osmosis unit, the reverse osmosis unit respectively with reverse osmosis produced water tank and reverse osmosis concentrated
Water tank connection, the concentration tower feed exchanger are connect with the reverse osmosis concentrated water tank, the concentration tower feed exchanger, concentration
Tower boils heat exchanger again and vapor condensation heat-exchange device is connect with the concentration tower, and the concentration tower feed exchanger is used for entrance
The reverse osmosis concentrated water of the concentration tower heats, and the concentration tower boils heat exchanger to by the dense of the concentration tower feed exchanger again
Water reheats, and the vapor condensation heat-exchange device is used for the concentration tower overhead vapours condensing recovery, the crystallizer with it is described
Concentration tower connection, the crystallizer are used for the processed concentrated water crystallization treatment of the concentration tower.
2. high-salt wastewater concentration systems according to claim 1, which is characterized in that
The concentration tower is glass steel material concentration tower, and the concentration tower inner stuffing is SAF2205 material or SAF2507 material
Matter.
3. high-salt wastewater concentration systems according to claim 1, which is characterized in that
The concentrated water outlet of the concentration tower is connect with the concentration tower feed exchanger, and the concentration tower feed exchanger is also used to
To the concentration tower treated concentrated water cooling processing.
4. high-salt wastewater concentration systems according to claim 1, which is characterized in that
The concentrating tower device further includes concentration tower feed pump, boil heat exchanger circulating pump again and concentration tower concentrated water sends pump outside；
The concentration tower feed pump is used to the concentrated water of the reverse osmosis concentrated water tank being pumped into the concentration tower feed exchanger, described
Heat exchanger circulating pump is boiled again and boils heat exchanger again for the concentrate in concentration tower to be pumped into concentration tower, and the concentration tower concentrated water is sent outside
Pump is for being pumped into crystallizer for concentrate.
5. high-salt wastewater concentration systems according to claim 1, which is characterized in that
The water inlet of the reverse osmosis unit is connected with cartridge filter.
6. high-salt wastewater concentration systems according to claim 5, which is characterized in that
The water inlet of the cartridge filter is connected with sand filtering device or tubular type micro-filtration；The upstream of the sand filtering device connects
There is clarifying basin；The upstream of the tubular type micro-filtration is connected with three headers of reaction.
7. a kind of high-salt wastewater method for concentration, which is characterized in that include the following steps,
High-salt wastewater is handled through reverse osmosis unit, collect concentrated water respectively and produces water；
The concentrated tower feed exchanger of the concentrated water, concentration tower, concentration tower are boiled heat exchanger again and handle to obtain steam and concentrate；
The steam is recycled through vapor condensation heat-exchange device；
By the concentrate crystallization treatment.
8. high-salt wastewater method for concentration according to claim 7, which is characterized in that described by the concentrate crystallization treatment
Before further include:
The concentration tower tower bottom concentrate is handled through the concentration tower feed exchanger cooling.
9. high-salt wastewater method for concentration according to claim 7, which is characterized in that
It is described high-salt wastewater is handled through reverse osmosis unit before further include:
The high-salt wastewater is pre-processed, the pretreatment includes the combination of following one or more kinds of processing modes, medicine
Agent softening, flocculation sedimentation, clarifying treatment, sand filtration, tube microfiltration membrane filtering.
10. high-salt wastewater method for concentration according to claim 7, which is characterized in that it is described by high-salt wastewater through reverse osmosis
Before device processing further include:
The high-salt wastewater is handled through cartridge filter.
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| CN113069924A (en) * | 2021-03-25 | 2021-07-06 | 广东碟中碟膜技术有限公司 | Equipment and process for preheating raw water by using heat of reverse osmosis system |
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