CN107585968B - A kind of chlor-alkali brine waste processing system and method - Google Patents
A kind of chlor-alkali brine waste processing system and method Download PDFInfo
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- CN107585968B CN107585968B CN201711008992.2A CN201711008992A CN107585968B CN 107585968 B CN107585968 B CN 107585968B CN 201711008992 A CN201711008992 A CN 201711008992A CN 107585968 B CN107585968 B CN 107585968B
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Abstract
The invention discloses a kind of chlor-alkali brine waste processing system and methods, including acetylene generator, polyplant and soda equipment；Acetylene generator is connected to acetylene supernatant liquid processing device, and acetylene supernatant liquid processing device is connected with cement plant；Polyplant is connected to polymeric mother liquid water biochemical treatment apparatus, polymeric mother liquid water biochemical treatment apparatus is connected to polymeric mother liquid water depth processing unit, polymeric mother liquid water depth processing unit is connected to production waste water biochemical treatment device again, produces waste water biochemical treatment device with sanitary sewage biochemical treatment apparatus and is connected to Treated sewage reusing device；Soda equipment is connected to caustic soda wastewater treatment equipment, and halogen transportation device is adopted in the connection of caustic soda wastewater treatment equipment.The present invention is directed to different types of waste water, optimizes waste water sub-prime classified utilization mode, maximumlly realizes cycling utilization of wastewater, reduces wastewater discharge；It is maximized to improve water utilization rate, production cost is reduced, the purpose of protection environment is finally reached.
Description
Technical field
The invention belongs to chlor-alkali enterprises brine waste process fields, and in particular to what is generated during a kind of chlor-alkali production is useless
Water treatment system and method.
Background technique
Coal resources in China and water resource are in contrary distribution, and construction large chemical complex, the Northwest has more highlighted economy
Contradiction between development and environmental bearing capacity.In recent years, national environmental protection policy proposes industrial wastewater treatment increasingly tighter
The requirement and limitation of lattice, wastewater treatment and high efficiente callback utilize the extensive attention by industrial enterprise.In order to improve the weight of waste water
Multiple utilization rate, reverse osmosis membrane technology become the important means of chlor-alkali enterprises waste water recycling, in the industrial production using relatively broad.
But the wastewater recycle rate of reverse osmosis membrane technology only has 70% or so, and the strong brine of residue 30% or so still needs to discharge.Such dense salt
Water composition is complex, big containing higher hardness, heavy metal ion, silicon, a variety of salt and organic matter, processing difficulty.It is most
Qualified discharge after enterprise reprocesses such strong brine, there are still water utilization rate is not high and problem of environmental pollution.One
Some Enterprises then use the anti-permeable membrane of concentrated water to be further concentrated, and waste water zero emission is then realized by the way of evaporative crystallization.So
And the processing for the strong brine that the former generates is more difficult, Sewage treatment rate is lower；The latter's investment cost and operating cost are higher,
And the carnallite processing that crystallization generates is still more intractable.
Summary of the invention
To solve drawbacks described above existing in the prior art, the purpose of the present invention is to provide at a kind of chlor-alkali brine waste
System and method is managed, in sufficiently each device area waste water characteristic of analysis chlor-alkali internal system, is required with water and internal water balance studies
On the basis of, optimize all kinds of waste water sub-prime classified utilization schemes, reduces final waste water total amount, and carry out at concentration to final waste water
Reuse is managed, realizes high efficient utilization of water resources, is finally reached the purpose of protection environment.
The present invention is realized by following technical proposals.
A kind of chlor-alkali brine waste processing system, including acetylene generator, polyplant and soda equipment；
The acetylene generator is connected to acetylene supernatant liquid processing device, acetylene supernatant liquid processing device and cement plant
It is connected；
The polyplant is connected to polymeric mother liquid water biochemical treatment apparatus, and the connection of polymeric mother liquid water biochemical treatment apparatus is poly-
Mother liquid coming advanced treatment apparatus is closed, polymeric mother liquid water depth processing unit is connected to production waste water biochemical treatment device again, produces
Waste water biochemical treatment device is connected to Treated sewage reusing device with sanitary sewage biochemical treatment apparatus；
The soda equipment is connected to caustic soda wastewater treatment equipment, and halogen transportation device is adopted in the connection of caustic soda wastewater treatment equipment；
The Treated sewage reusing device be further connected to production waste water biochemical treatment device, sanitary sewage biochemical treatment apparatus,
Between power plant desulfurization device, pure water waterwheel and water station is recycled, is further connected between pure water waterwheel and adopts halogen transportation device.
Preferably, the acetylene supernatant liquid processing device includes the acetylene concentration basin and cold water being connected with acetylene generator
Tower, acetylene concentration basin and cooling tower are connected to cement plant through filter-pressing device；Acetylene generator is sequentially connected water scrubber, alkali cleaning
Tower and water mist supplementary set device are to acetylene cleaning device.
Preferably, the polymeric mother liquid water biochemical treatment apparatus includes the level-one settling tank being connected with polyplant, level-one
Settling tank is sequentially communicated cooling tower, wastewater neutralizer, multi-stage biochemical pond, second level settling tank, sand filter, active carbon adsorber and mistake
Filter pool, sand filter and active carbon adsorber are further connected to sludge vacuum dewatering system to wastewater neutralizer.
Preferably, the polymeric mother liquid water depth processing unit includes the drainage excessively with polymeric mother liquid water biochemical treatment apparatus
The more medium filter I that pond is connected, more medium filter I are sequentially communicated ultra-filtration membrane device I, intermediate pool, biological activated carbon
System, organic matter resin adsorption device, ion exchange system and waste water reclamation pond；More medium filter and ultra-filtration membrane device I into
The wastewater neutralizer of one step connection polymeric mother liquid water biochemical treatment apparatus.
Preferably, the production waste water biochemical treatment device include and production wastewater equalization pond, production wastewater equalization pond according to
Secondary connection flocculation basin, inclined plate sedimentation pond, hydrolysis acidification pool, contact-oxidation pool, secondary sedimentation tank and intermediate pool.
Preferably, the sanitary sewage biochemical treatment apparatus includes sanitary sewage conditioning tank, and sanitary sewage conditioning tank is successively
The sludge of connection flocculation sedimentation tank, anaerobic pond, aerobic tank and secondary settling tank, secondary settling tank and flocculation sedimentation tank is after filter press filters pressing
Filtrate is connected to conditioning tank.
Preferably, the Treated sewage reusing device includes raw with the secondary settling tank of sanitary sewage biochemical treatment apparatus and production waste water
Change the more medium filter II that the intermediate pool of processing unit is connected, more medium filter II is sequentially communicated fine filter, surpasses
Filter membrane device II, ultrafiltration pond and micron fine filter, micron fine filter are respectively communicated with nano filter membrance device and reverse osmosis membrane dress
Set, nano filter membrance device is respectively communicated with coagulative precipitation tank and adopts halogen transportation device, reverse osmosis membrane apparatus be respectively communicated with coagulative precipitation tank and
It recycles between water station or pure water waterwheel.
Correspondingly, The present invention gives the wastewater treatment methods of chlor-alkali brine waste processing system, comprising the following steps:
1) after the carbide slag slurries of acetylene generator output enter the concentration of acetylene concentration basin, upper clear supernate is back to acetylene hair
Generating apparatus, filtrate of the dense carbide slag slurries in bottom after filter press filters pressing are back to supernatant liquid pool, and filter cake is delivered to cement plant area
Produce cement；Through water scrubber, caustic wash tower to water mist supplementary set device, the waste water of generation drains into the acetylene gas of acetylene generator output
Peace and quiet buffering water pot, then with being pumped to acetylene generator reuse；
2) mother liquid coming that polyplant generates first separates resin through level-one settling tank, and the mother liquid coming after separation is through cooling tower
Enter wastewater neutralizer after cooling and adjusts pH value；In multi-stage biochemical reaction tank, flour, urea, sodium dihydrogen phosphate and ferment are added
Mother liquid coming of female bacterium control dissolved oxygen after 1-3mg/l, biochemistry enters second level settling tank, and upper clear supernate is through sand filter, active carbon
Absorber filtering enters filtered water reservoir, is sent respectively to acetylene generator, circulation water station and mother liquid coming advanced treatment apparatus；Bottom
Sludge send the backwash water of the waste water taken off to sludge vacuum dewatering system and sand filter and active carbon adsorber to be back in waste water
The pond and；Other production waste water of polyplant area enter wastewater neutralizer after water vaporization tower recycles vinyl chloride；
3) in the filtered water reservoir of polymeric mother liquid water biochemical treatment apparatus qualified mother liquid coming through more medium filter I, ultrafiltration membrane
Device I further removes useless impurities in water, then has further decreased through biological activated carbon system and organic matter resin adsorption device
Machine object, finally by ion exchange system by mother liquor water handling reclamation；More medium filter I, I backwash water of ultra-filtration membrane device pass through
Pipeline is back to wastewater neutralizer, and ion exchange system regenerative wastewater is sent after entering regenerated pond to production wastewater biochemical processing dress
It sets；
4) regenerative wastewater of soda equipment and other production waste water enter neutralizing water tank, remove system by free chlorine and remove
After free chlorine, water up to standard send to adopting halogen transportation device and adopts halogen for infusing well；
5) conditioning tank that circulation water station sewerage and other production waste water enter production waste water biochemical treatment device adjusts pH
Value, then give to flocculation basin and aluminium polychloride, polyacrylamide flocculant is added, enter back into inclined plate sedimentation pond, the wadding of bottom deposit
Body is sent to filter press, and after filter cake dries and boiler burning disposal is sent into raw coal blending；Pressing filtering liquid enters conditioning tank, inclined plate sedimentation pond
Water outlet further decreases wastewater through organic matter through hydrolysis acidification pool and contact-oxidation pool, controls hydrolysis acidification pool dissolved oxygen, aeration；Two
After heavy pond processing is qualified, into intermediate pool；
6) sanitary sewage enters sanitary sewage biochemical treatment apparatus balancing tank, send miscellaneous to flocculation sedimentation tank removing bulky grain
After matter, after overflow enters anaerobic pond, aerobic tank and secondary settling tank processing qualification, it to be used for Treated sewage reusing device or green area irrigation；Flocculation
The filtrate of sedimentation basin and secondary settling tank base sludge after filters pressing is back to conditioning tank by tube overflow；
7) production waste water biochemical treatment device treated production waste water and sanitary sewage biochemical treatment apparatus treated
Sanitary sewage goes to clean through more medium filter II and fine filter, reduces impurity and suspended matter by ultra-filtration membrane device II；Its
Middle ultrafiltration fresh water enters ultrafiltration pond, and non oxidizing bactericide is added；II backwash water of more medium filter and ultrafiltration concentrated water return
Biochemical treatment again is carried out to production wastewater biochemical disposal plant front end；Fresh water is respectively fed to reverse osmosis membrane and receives in ultrafiltration pond
Filter membrane device, reverse osmosis freshwater are sent to front end between waterwheel processed or circulation water station, and nanofiltration fresh water is sent to adopting halogen transportation device for infusing well
Adopt halogen；After reverse osmosis concentrated water and nanofiltration concentrated water enter coagulative precipitation tank processing qualification, send to acetylene and occur and power plant desulfurization device.
Preferably, in the step 5), control hydrolysis acidification pool dissolved oxygen is less than 0.2mg/L, and contact-oxidation pool aeration is protected
Dissolved oxygen is held in 2-4mg/L.
Preferably, in the step 7), non oxidizing bactericide is Tao Shi water treatment biocide AQUCARTM RO-20,
AQUCAR RO-150 or AQUCAR RO-8536；
The reverse osmosis membrane is FILMTECTMIt is rich resistance toTMCR100, FILMTEC BW30-365FR or FILMTEC BW30-
365；The nanofiltration membrane is FILMTECTMIt is rich resistance toTMXC70, XC80, XC-N or NF-2540；
The ultrafiltration membrane is AQU200 ultrafiltration membrane, HUF10-200 ultrafiltration membrane or SFP2660 Tao Shi ultrafiltration membrane.
The beneficial effects of the present invention are:
The present invention sufficiently combines chlorine industry itself productive prospecting, for different types of waste water, optimizes waste water sub-prime point
Grade Land use systems, maximumlly realize cycling utilization of wastewater, reduce final wastewater discharge；Realizing that waste water zero emission is same
When, in the design of final sewage treatment facility, enterprises are fully considered respectively with water spot water requirement, at suitable waste water
Reason technology makes processed waste water meet production requirement, maximumlly improves water utilization rate, reduces production cost, is finally reached
Protect the purpose of environment.
Detailed description of the invention
Fig. 1 is present system block diagram；
Fig. 2 is acetylene supernatant liquid processing device structural block diagram；
Fig. 3 is polymeric mother liquid water biochemical treatment apparatus structural block diagram；
Fig. 4 is polymeric mother liquid water depth processing unit structural block diagram；
Fig. 5 is production waste water biochemical treatment device structural block diagram；
Fig. 6 is sanitary sewage biochemical treatment apparatus structural block diagram；
Fig. 7 is Treated sewage reusing apparatus structure block diagram.
Specific embodiment
Below with reference to embodiment, the present invention is described in further detail, but is not intended as doing any restrictions to the present invention
Foundation.
As shown in Figure 1, a kind of chlor-alkali brine waste processing system of the present invention, including acetylene generator, polyplant and
Soda equipment.
Acetylene generator is connected to acetylene supernatant liquid processing device, and acetylene supernatant liquid processing device is connected with cement plant
It is logical；Polyplant is connected to polymeric mother liquid water biochemical treatment apparatus, and polymeric mother liquid water biochemical treatment apparatus is connected to polymeric mother liquid water
Advanced treatment apparatus, polymeric mother liquid water depth processing unit are connected to production waste water biochemical treatment device again, produce wastewater biochemical
Processing unit is connected to Treated sewage reusing device with sanitary sewage biochemical treatment apparatus；Soda equipment is connected to caustic soda wastewater treatment equipment,
Halogen transportation device is adopted in the connection of caustic soda wastewater treatment equipment.Wherein, Treated sewage reusing device is further connected to production waste biochemical treatment dress
It sets, produce between waste water biochemical treatment device, power plant desulfurization device, pure water waterwheel and circulation water station, into one between pure water waterwheel
Step, which is connected to, adopts halogen transportation device.
Pure water obtained is used for caustic soda, polymerization and boiler of power plant device, the yin-yang bed regenerated of generation between pure water waterwheel
Water be back to adopt halogen device note well adopt halogen.Acetylene generator generate carbide slag slurries through acetylene supernatant liquid processing device sedimentation and
Supernatant fluid reuse is to acetylene generator, wet carbide slag to cement plant after filters pressing.The centrifuge mother liquor water warp that polyplant generates
After the processing of polymeric mother liquid biochemical treatment apparatus, it is partially back to circulation water station and acetylene generator, the aggregated mother liquor depth of water in part
Reuse is to polymerization PVC after spending processing unit.The chelate resin tower regenerative wastewater that soda equipment generates and other waste water are through locating
Be back to after reason adopt halogen device note well adopt halogen；Water station sewerage and part producing waste water are recycled through producing waste water biochemical treatment device
Handle it is up to standard after send to Treated sewage reusing device；Sanitary sewage send to middle water after the processing of sanitary sewage biochemical treatment apparatus is up to standard and returns
With device or it is used for green area irrigation；The fresh water reuse that Treated sewage reusing device generates is to adopting halogen device, recycle between water station or waterwheel processed
Front end, is back to power plant desulfurization device after concentrated water processing or acetylene occurs.
As shown in Fig. 2, acetylene supernatant liquid processing device includes the acetylene concentration basin and cold water being connected with acetylene generator
Tower, acetylene concentration basin and cooling tower are connected to cement plant through filter-pressing device respectively；Acetylene generator be sequentially connected water scrubber,
Caustic wash tower and water mist supplementary set device are to acetylene cleaning device.
As shown in figure 3, the biochemical treatment of polymeric mother liquid water and reclamation set include level-one settling tank, cooling tower, waste water neutralization
Pond, multi-stage biochemical pond, second level settling tank, sand filter, active carbon adsorber, filtered water reservoir, waste water lifting pump and sludge vacuum are de-
Water system.Level-one settling tank is connected with polyplant, and level-one settling tank is simultaneously sequentially communicated cooling tower, wastewater neutralizer, multistage life
Change pond, second level settling tank, sand filter, active carbon adsorber and filtered water reservoir, sand filter to be further connected to active carbon adsorber
To sludge vacuum dewatering system to wastewater neutralizer.
The mother liquid coming generated in polymerization process through level-one settling tank remove part Corvic, then send to cooling tower,
Wastewater neutralizer, multi-stage biochemical pond, second level settling tank, sand filter, active carbon adsorber, last water up to standard to filtered water reservoir, lead to
Waste water lifting is crossed to pump to circulation water station, acetylene generator and mother liquid coming advanced treatment apparatus；Other productions of polyplant area
Waste water enters wastewater neutralizer after water vaporization tower recycles vinyl chloride；The waste water and sand filtration that sludge vacuum dewatering system comes out
Device, active carbon filter backwash water pass through back of pipeline to multistage biochemistry pool front end.
As shown in figure 4, polymeric mother liquid water depth processing unit, including more medium filter I, ultra-filtration membrane device I, intermediate water
Pond, biological activated carbon system, organic matter resin adsorption device, ion exchange system and regenerated pond.More medium filter I with
Polymeric mother liquid water biochemical treatment apparatus filtered water reservoir is connected, and more medium filter I is sequentially communicated ultra-filtration membrane device I, intermediate water
Pond, biological activated carbon system, organic matter resin adsorption device, ion exchange system and waste water reclamation pond；More medium filter and
Ultra-filtration membrane device I is further connected to the wastewater neutralizer of polymeric mother liquid water biochemical treatment apparatus.
Qualified mother liquid coming is boosted in filtered water reservoir is pumped to more medium filter I, ultra-filtration membrane device I further removal is useless
Impurities in water, then useless Organic substance in water is further decreased through biological activated carbon system and organic matter resin adsorption device, it is desirable that have
Machine object content is less than 2ppm, and mother liquor water process is reached polymerization water requirement finally by ion exchange system, is back to polymerization
Kettle produces PVC.More medium filter I, I backwash water of ultra-filtration membrane device are back to wastewater neutralizer, ion exchange system by pipeline
Regenerative wastewater is sent after entering regenerated pond to production waste water biochemical treatment device.
Caustic soda wastewater treatment equipment includes neutralizing water tank, free chlorine removal system.Soda equipment chelate resin tower regenerated
Water and other production waste water of device area enter neutralizing water tank, and pH value is adjusted to 8-9, system is removed by free chlorine and removes and dissociate
After chlorine, last water up to standard send to adopting halogen transportation device and adopts halogen for infusing well.
As shown in figure 5, production waste water biochemical treatment device includes production wastewater equalization pond, production wastewater equalization pond successively connects
Logical flocculation basin, inclined plate sedimentation pond, hydrolysis acidification pool, contact-oxidation pool, secondary settling tank and intermediate pool.
Circulation water station sewerage and other production waste water enter the conditioning tank of production waste water biochemical treatment device, by pH value control
System is in 7-8, then is produced waste water lifting and pumped to flocculation basin, inclined plate sedimentation pond, after large granular impurity is removed, through hydrolysis acid
After change, contact-oxidation pool, secondary settling tank processing are qualified, into intermediate pool.
As shown in fig. 6, sanitary sewage biochemical treatment apparatus includes conditioning tank, flocculation sedimentation tank, anaerobic pond, aerobic tank, two
Heavy pond and sludge dewatering system.Sanitary sewage conditioning tank is sequentially communicated flocculation sedimentation tank, anaerobic pond, aerobic tank and secondary settling tank, and two
Filtrate of the sludge of heavy pond and flocculation sedimentation tank after filter press filters pressing is connected to conditioning tank.
Sanitary sewage enters balancing tank, is pumped to flocculation sedimentation tank through sanitary sewage promotion and goes out after large granular impurity,
Overflow is sent after entering anaerobic pond, aerobic tank, secondary settling tank processing qualification to Treated sewage reusing device or for green area irrigation.Flocculation is heavy
Shallow lake pond and secondary settling tank base sludge are through sludge pumping to plate and frame filter press, and filtrate is back to conditioning tank by tube overflow, and filter cake is mixed
Mixed raw coal is sent into boiler.
As shown in fig. 7, Treated sewage reusing device includes more medium filter II, fine filter, ultra-filtration membrane device II, ultrafiltration water
Pond, 5 microns of fine filters, reverse osmosis membrane apparatus, nano filter membrance device and coagulative precipitation tank.The two of sanitary sewage biochemical treatment apparatus
The intermediate pool of heavy pond and production waste water biochemical treatment device is connected more medium filter II, and more medium filter II successively connects
Logical fine filter, ultra-filtration membrane device II, ultrafiltration pond and micron fine filter, micron fine filter are respectively communicated with nano filter membrance device
And reverse osmosis membrane apparatus, nano filter membrance device are respectively communicated with coagulative precipitation tank and adopt halogen transportation device, reverse osmosis membrane apparatus is respectively communicated with
Between coagulative precipitation tank and circulation water station or pure water waterwheel.
Intermediate pool waste water through more medium filter and fine filter removal large granular impurity after, by ultra-filtration membrane device into
One step reduces the impurity and suspended matter in waste water, and wherein ultrafiltration fresh water enters ultrafiltration pond, more medium filter backwash water and super
Filter concentrated water is back to production wastewater biochemical disposal plant front end by pipeline and carries out biochemical treatment again.Fresh water passes through in ultrafiltration pond
Waste water lifting pump, high-pressure pump are sent into reverse osmosis membrane and nano filter membrance device, reverse osmosis freshwater send to front end between waterwheel processed and be used to prepare
Pure water is sent to circulation water station, and nanofiltration fresh water send to adopting halogen transportation device and adopts halogen for infusing well.Reverse osmosis concentrated water and nanofiltration concentrated water into
After entering coagulative precipitation tank processing qualification, send to acetylene and occur and power plant desulfurization device.
Chlor-alkali salt-containing waste water treatment method of the present invention, includes the following steps:
1) carbide slag slurries of the solid content come out from acetylene generator in 10-12% enter concentration by aqueduct overflow
Pond.After concentrated, upper clear supernate overflow enters supernatant liquid pool, then cools the temperature to 50 DEG C or less through cooling tower and be back to acetylene hair
Raw, bottom solid content is delivered to plate and frame filter press through Pulp pump in 20% or more dense carbide slag slurries, and filtrate is back to supernatant
Pond, filter cake produce cement using Belt Conveying to cement plant area.Acetylene unit area water scrubber, water mist supplementary set device, positive/negative-pressure water
Envelope is drained to peace and quiet buffering water pot, then reuse occurs with acetylene is pumped to.By acetylene unit area internal water balance optimizing and follow
Ring utilizes, final to realize waste water zero emission inside acetylene unit area.
2) mother liquid coming that polymeric size centrifuge is centrifuged out first is divided the resin in mother liquid coming through level-one settling tank
From the mother liquid coming after separation enters wastewater neutralizer after waste water lifting is pumped to cold water tower cooler, adjusts pH value in 6.5-
8.5；In multi-stage biochemical reaction tank, the battalion such as flour, urea, sodium dihydrogen phosphate, saccharomycete is added according to microorganism growing state
Substance is supported, controls dissolved oxygen in 1-3mg/l, temperature is at 18-35 DEG C, to keep good microorganism growing environment, in biochemistry pool
Help microorganism attachment and growth equipped with filler；Mother liquid coming after biochemistry enters second level settling tank, and upper clear supernate is through sand filter, work
Property the filtering of charcoal absorber enter pond after filtering, then pump through waste water lifting to acetylene and occur, circulation water station and mother liquor water depth
Processing unit, through sludge pumping to sludge vacuum dewatering system, waste water and sand filter, the active carbon taken off filters base sludge
Device backwash water passes through back of pipeline to multistage biochemistry pool front end.Other production waste water of polyplant area recycle chloroethene through water vaporization tower
Enter wastewater neutralizer after alkene.Mother liquid coming index is shown in Table 1 before and after biochemical treatment.
Mother liquid coming index before and after 1 biochemical treatment of table:
| Index | Before biochemistry | After biochemistry |
| PH value | 6.1-6.5 | 6-9 |
| COD/mg/L | 200-370 | 10-40 |
| Ammonia nitrogen/mg/L | - | 2-3 |
| Conductivity/us/cm | 200-260 | 200-260 |
3) polymeric mother liquid water depth processing system, including more medium filter I, ultra-filtration membrane device I, intermediate pool, biology
Activated carbon system, organic matter resin adsorption device, ion exchange system and regenerated pond.Qualified mother liquid coming in pond after filtering
Boosted more medium filter I, the ultra-filtration membrane device I of being pumped to further removes useless impurities in water, and ultrafiltration membrane can be ultrafiltration membrane
AQU200, ultrafiltration membrane HUF10-200, Tao Shi ultrafiltration membrane SFP2660, delivery turbidity is less than 1；Biological activated carbon system and had again
Machine resin adsorbent equipment further decreases organic matter, and outlet water organic substance content is less than 2ppm；Finally by ion exchange system
Mother liquor water process is reached into polyvinyl chloride synthetic reaction water requirement.More medium filter I, I backwash water of ultra-filtration membrane device pass through
Pipeline is back to wastewater neutralizer, and ion exchange system regenerative wastewater is sent after entering regenerated pond to production wastewater biochemical processing dress
It sets.Mother liquid coming advanced treatment apparatus disengaging water quality indicator is shown in Table 2.
2 mother liquid coming advanced treatment apparatus of table passes in and out water quality indicator:
| Index | Before advanced treating | After advanced treating |
| PH value | 6.5-7.5 | 6.5-7.5 |
| COD/mg/L | 20-40 | 2 |
| Fe/mg/L | 0.08-0.24 | Less than 0.01 |
| Conductivity/us/cm | 200-260 | Less than 1 |
| Na/ug/L | 18-30 | Less than 20 |
| Si/mg/L | 1-3 | Less than 1 |
4) caustic soda wastewater treatment equipment includes neutralizing water tank, free chlorine removal system.The regeneration of soda equipment chelate resin tower
Waste water and production waste water enter neutralizing water tank, and pH value is adjusted to 8-9, after removing system removing free chlorine by free chlorine, most
Water up to standard send to adopting halogen transportation device and adopts halogen for infusing well afterwards.Soda equipment area includes that the processing of chlorine hydrogen, electrolysis unit and evaporation are solid
Alkali device, the machine water shutoff of chlorine hydrogen processing generation are sent after producing wastewater collection to electrolysis neutralizing water tank；Evaporate the alkalinity that solid caustic soda generates
Recycling condensing water is to the moisturizing of electrolysis unit catholyte and synthetic furnace moisturizing, steam condensate (SC) reuse water-tube boiler moisturizing；Electrolysis dress
Set area's machine water shutoff, chelating resin regenerative wastewater and other production waste water and neutralizing water tank be directly entered by pipeline, using spent acid with
Salkali waste adjusts pH value in 8-9, adds sodium sulfite powder, by free chlorine control in waste water 0 hereinafter, qualified waste water use in and
Water be pumped to adopt halogen transportation device area note well adopt halogen.By chlor-alkali devices area internal water balance optimizing and recycle, it is final to realize
Brine waste " zero-emission " inside chlor-alkali devices area.
5) production waste water biochemical treatment device includes wastewater equalization pond, flocculation basin, inclined plate sedimentation pond, hydrolysis acidification pool, connects
Touch oxidation pond, secondary settling tank and intermediate pool.Circulation water station sewerage and other production waste water enter conditioning tank, and pH value control is existed
7-8, then produced waste water lifting and pumped to flocculation basin, the flocculants such as aluminium polychloride, polyacrylamide are added, are stirred,
So that flocculant and waste water is come into full contact with mixing, enters back into inclined plate sedimentation pond.The wadding body of inclined plate sedimentation bottom of pond portion deposition is through sludge pump
It send to filter press, after filter cake dries and boiler burning disposal is sent into raw coal blending.Through hydrolysis acidification pool and contact-oxidation pool into one
Step reduces wastewater through organic matter, and control hydrolysis acidification pool dissolved oxygen is less than 0.2mg/L, and contact-oxidation pool is aerated using air blower, protects
Dissolved oxygen is held in 2-4mg/L；After secondary settling tank processing is qualified, into intermediate pool.Produce waste water biochemical treatment device Inlet and outlet water water
Matter index is shown in Table 3.
Table 3 produces waste water biochemical treatment device Inlet and outlet water water quality indicator:
| Index | After processing |
| PH value | 6.5-7.5 |
| COD/mg/L | 30-60 |
| Ammonia nitrogen/mg/L | 4-5 |
| SS | 10-15 |
6) sanitary sewage biochemical treatment apparatus includes conditioning tank, flocculation sedimentation tank, anaerobic pond, aerobic tank, secondary settling tank and dirt
Mud dewatering system.Sanitary sewage enters balancing tank, is pumped to flocculation sedimentation tank through sanitary sewage promotion and removes large granular impurity
Afterwards, after overflow enters anaerobic pond, aerobic tank, secondary settling tank processing qualification, Treated sewage reusing device or green area irrigation are used for.Flocculation sedimentation
Through sludge pumping to plate and frame filter press, filtrate is back to conditioning tank by tube overflow for pond and secondary settling tank base sludge.Produce waste water
Biochemical treatment apparatus Inlet and outlet water water quality indicator is shown in Table 4.
Table 4 produces waste water biochemical treatment device Inlet and outlet water water quality indicator:
| Index | After processing |
| PH value | 6-9 |
| COD/mg/L | 100 |
| Ammonia nitrogen/mg/L | 25 |
7) Treated sewage reusing device includes more medium filter II, fine filter, ultra-filtration membrane device II, ultrafiltration pond, 5 microns
Fine filter, reverse osmosis membrane apparatus, nano filter membrance device and coagulative precipitation tank.Waste water is removed through more medium filter and fine filter
After large granular impurity, impurity and suspended matter in waste water are further decreased by ultra-filtration membrane device, ultrafiltration membrane can be ultrafiltration membrane
AQU200, ultrafiltration membrane HUF10-200, Tao Shi ultrafiltration membrane SFP2660, delivery turbidity is less than 1；Wherein ultrafiltration fresh water enters ultrafiltration water
Pond is added microorganism growth in non oxidizing bactericide control waste water, reduces pollution of the organic matter to film, non oxidizing bactericide
It can be Tao Shi water treatment biocide AQUCARTM RO-20, AQUCAR RO-150 AQUCAR RO-8536 etc..Multimedium mistake
Filter backwash water and ultrafiltration concentrated water are back to production wastewater biochemical disposal plant front end by pipeline and carry out biochemical treatment again.It is super
Fresh water is sent into reverse osmosis membrane and nano filter membrance device through waste water lifting pump, high-pressure pump in filter pool, and wherein reverse osmosis membrane can be
FILMTECTMIt is rich resistance toTMCR100, FILMTEC BW30-365FR and FILMTEC BW30-365, nanofiltration membrane can be FILMTECTM
It is rich resistance toTMXC70, XC80, XC-N and NF-2540 etc..Reverse osmosis freshwater, which is sent to front end between waterwheel processed, to be used to prepare pure water or send to following
Ring water station, nanofiltration fresh water send to adopting halogen transportation device and adopt halogen for infusing well.Reverse osmosis concentrated water and nanofiltration concentrated water enter coagulative precipitation tank
After processing is qualified, send to acetylene and occur and power plant desulfurization device.Treated sewage reusing device Inlet and outlet water water quality indicator is shown in Table 5.
5 Treated sewage reusing device Inlet and outlet water water quality indicator of table:
As can be seen from the above Table 5, the chlor-alkali brine waste handled through system of the invention, its TOC of reverse osmosis membrane fresh water
Less than 1mg/L, nanofiltration membrane fresh water is less than 7mg/L；Reverse osmosis membrane fresh water bivalent metal ion is less than 0.3mg/L, nanofiltration membrane fresh water
Less than 7mg/L；Reverse osmosis membrane fresh water Cl is less than 10mg/L；Reverse osmosis membrane fresh water Si is less than 0.001mg/L, and nanofiltration membrane fresh water is less than
10mg/L.There is preferable water quality through chlor-alkali brine waste handled by present system, can be realized " the zero-emission of waste water
It puts ".
The present invention is not limited to the above embodiments, on the basis of technical solution disclosed by the invention, the skill of this field
For art personnel according to disclosed technology contents, one can be made to some of which technical characteristic by not needing creative labor
A little replacements and deformation, these replacements and deformation are within the scope of the invention.
Claims (4)
1. a kind of chlor-alkali brine waste processing system, which is characterized in that filled including acetylene generator, polyplant and caustic soda
It sets；
The acetylene generator is connected to acetylene supernatant liquid processing device, and acetylene supernatant liquid processing device is connected with cement plant
It is logical；
The polyplant is connected to polymeric mother liquid water biochemical treatment apparatus, and the connection polymerization of polymeric mother liquid water biochemical treatment apparatus is female
Liquid water depth processing unit, polymeric mother liquid water depth processing unit are connected to production waste water biochemical treatment device again, produce waste water
Biochemical treatment apparatus is connected to Treated sewage reusing device with sanitary sewage biochemical treatment apparatus；
The soda equipment is connected to caustic soda wastewater treatment equipment, and halogen transportation device is adopted in the connection of caustic soda wastewater treatment equipment；
The Treated sewage reusing device is further connected to production waste water biochemical treatment device, sanitary sewage biochemical treatment apparatus, power plant
Between desulfurizer, pure water waterwheel and water station is recycled, is further connected between pure water waterwheel and adopts halogen transportation device；
The acetylene supernatant liquid processing device includes the acetylene concentration basin and cooling tower being connected with acetylene generator, acetylene concentration
Pond and cooling tower are connected to cement plant through filter-pressing device；Acetylene generator is sequentially connected water scrubber, caustic wash tower, water mist supplementary set
Device is to acetylene cleaning device；
The polymeric mother liquid water biochemical treatment apparatus includes the level-one settling tank being connected with polyplant, and level-one settling tank successively connects
Logical cooling tower, wastewater neutralizer, multi-stage biochemical pond, second level settling tank, sand filter, active carbon adsorber and filtered water reservoir, sand filtration
Device and active carbon adsorber are further connected to sludge vacuum dewatering system to wastewater neutralizer；
The polymeric mother liquid water depth processing unit includes being connected with the filtered water reservoir of polymeric mother liquid water biochemical treatment apparatus
More medium filter I, more medium filter I are sequentially communicated ultra-filtration membrane device I, intermediate pool, biological activated carbon system, organic matter
Resin adsorption device, ion exchange system and waste water reclamation pond；More medium filter is further connected to polymerization with ultra-filtration membrane device I
The wastewater neutralizer of mother liquid coming biochemical treatment apparatus；
The production waste water biochemical treatment device include production wastewater equalization pond, production wastewater equalization pond be sequentially communicated flocculation basin,
Inclined plate sedimentation pond, hydrolysis acidification pool, contact-oxidation pool, secondary sedimentation tank and intermediate pool；
The sanitary sewage biochemical treatment apparatus includes sanitary sewage conditioning tank, and sanitary sewage conditioning tank is sequentially communicated flocculation sedimentation
Filtrate of the sludge of pond, anaerobic pond, aerobic tank and secondary settling tank, secondary settling tank and flocculation sedimentation tank after filter press filters pressing is connected to tune
Save pond；
The Treated sewage reusing device include and the secondary settling tank of sanitary sewage biochemical treatment apparatus and production waste water biochemical treatment device
The more medium filter II that is connected of intermediate pool, more medium filter II be sequentially communicated fine filter, ultra-filtration membrane device II,
Ultrafiltration pond and micron fine filter, micron fine filter are respectively communicated with nano filter membrance device and reverse osmosis membrane apparatus, nanofiltration membrane dress
It sets and is respectively communicated with coagulative precipitation tank and adopts halogen transportation device, reverse osmosis membrane apparatus is respectively communicated with coagulative precipitation tank and circulation water station or pure
Between water waterwheel.
2. the wastewater treatment method of chlor-alkali brine waste processing system described in a kind of claim 1, which is characterized in that including following
Step:
1) after the carbide slag slurries of acetylene generator output enter the concentration of acetylene concentration basin, upper clear supernate is back to acetylene and fills
It sets, filtrate of the dense carbide slag slurries in bottom after filter press filters pressing is back to supernatant liquid pool, and filter cake is delivered to the production of cement plant area
Cement；Through water scrubber, caustic wash tower to water mist supplementary set device, the waste water of generation is drained to clear the acetylene gas of acetylene generator output
Net buffering water pot, then with being pumped to acetylene generator reuse；
2) mother liquid coming that polyplant generates first separates resin through level-one settling tank, and the mother liquid coming after separation is through cold water tower cooler
Enter wastewater neutralizer afterwards and adjusts pH value；In multi-stage biochemical reaction tank, flour, urea, sodium dihydrogen phosphate and saccharomycete are added
It controls mother liquid coming of the dissolved oxygen after 1-3mg/l, biochemistry and enters second level settling tank, upper clear supernate is through sand filter, activated carbon adsorption
Device filtering enters filtered water reservoir, is sent respectively to acetylene generator, circulation water station and mother liquid coming advanced treatment apparatus；Base sludge
The backwash water of the waste water taken off to sludge vacuum dewatering system and sand filter and active carbon adsorber is sent to be back to waste water neutralization
Pond；Other production waste water of polyplant enter wastewater neutralizer after water vaporization tower recycles vinyl chloride；
3) in the filtered water reservoir of polymeric mother liquid water biochemical treatment apparatus qualified mother liquid coming through more medium filter I, ultra-filtration membrane device I
Useless impurities in water is further removed, then further decreases organic matter through biological activated carbon system and organic matter resin adsorption device,
Finally by ion exchange system by mother liquor water handling reclamation；More medium filter I, I backwash water of ultra-filtration membrane device pass through pipeline
It is back to wastewater neutralizer, ion exchange system regenerative wastewater is sent after entering regenerated pond to production waste water biochemical treatment device；
4) regenerative wastewater of soda equipment and other production waste water enter neutralizing water tank, remove system by free chlorine and remove and dissociate
After chlorine, water up to standard send to adopting halogen transportation device and adopts halogen for infusing well；
5) conditioning tank that circulation water station sewerage and other production waste water enter production waste water biochemical treatment device adjusts pH value, then
Send to flocculation basin and aluminium polychloride, polyacrylamide flocculant be added, enter back into inclined plate sedimentation pond, the wadding body of bottom deposit send to
Filter press, after filter cake dries and boiler burning disposal is sent into raw coal blending, and pressing filtering liquid enters conditioning tank；Inclined plate sedimentation pond water outlet warp
Hydrolysis acidification pool and contact-oxidation pool further decrease wastewater through organic matter, control hydrolysis acidification pool dissolved oxygen, aeration；At secondary settling tank
After reason is qualified, into intermediate pool；
6) sanitary sewage enters balancing tank in sanitary sewage biochemical treatment apparatus, send to flocculation sedimentation tank and removes large granular impurity
Afterwards, after overflow enters anaerobic pond, aerobic tank and secondary settling tank processing qualification, Treated sewage reusing device or green area irrigation are used for；Flocculation is heavy
The filtrate of shallow lake pond and secondary settling tank base sludge after filters pressing is back to conditioning tank by tube overflow；
7) production waste water biochemical treatment device treated production waste water and sanitary sewage biochemical treatment apparatus treated life
Sewage goes to clean through more medium filter II and fine filter, and impurity and suspension in waste water are reduced by ultra-filtration membrane device II
Object；Wherein ultrafiltration fresh water enters ultrafiltration pond, and non oxidizing bactericide is added；II backwash water of more medium filter and ultrafiltration concentrated water
It is back to production wastewater biochemical disposal plant front end and carries out biochemical treatment again；Fresh water is respectively fed to reverse osmosis membrane in ultrafiltration pond
And nano filter membrance device, reverse osmosis freshwater send to front end between waterwheel processed or circulation water station, nanofiltration fresh water and send to adopting halogen transportation device and be used for
Note well adopts halogen；After reverse osmosis concentrated water and nanofiltration concentrated water enter coagulative precipitation tank processing qualification, send to acetylene generation and power plant desulfurization
Device.
3. the wastewater treatment method of chlor-alkali brine waste processing system according to claim 2, which is characterized in that the step
It is rapid 5) in, control hydrolysis acidification pool dissolved oxygen be less than 0.2mg/L, contact-oxidation pool aeration, keep dissolved oxygen in 2-4mg/L.
4. the wastewater treatment method of chlor-alkali brine waste processing system according to claim 2, which is characterized in that the step
It is rapid 7) in, non oxidizing bactericide be Tao Shi water treatment biocide AQUCARTMRO-20, AQUCAR RO-150 or AQUCAR RO-
8536；
The reverse osmosis membrane is FILMTECTMIt is rich resistance toTMCR100, FILMTEC BW30-365FR or FILMTEC BW30-365；Institute
Stating nanofiltration membrane is FILMTECTMIt is rich resistance toTMXC70, XC80 or XC-N；
The ultrafiltration membrane is AQU200 ultrafiltration membrane, HUF10-200 ultrafiltration membrane or SFP2660 Tao Shi ultrafiltration membrane.
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| CN108439643A (en) * | 2018-04-16 | 2018-08-24 | 新疆华泰重化工有限责任公司 | The reclaiming system for the treatment of of wastewater from stripping in a kind of PVC Production Process |
| CN108726798B (en) * | 2018-05-31 | 2021-08-31 | 青海盐湖工业股份有限公司 | Waste water utilization system |
| CN109205960B (en) * | 2018-11-08 | 2021-10-22 | 陕西北元化工集团股份有限公司 | High-salt-content organic wastewater treatment system and method |
| CN109626650A (en) * | 2019-01-14 | 2019-04-16 | 芜湖融汇化工有限公司 | A kind of chlor-alkali enterprises waste water circulation comprehensive utilizes Zero discharging system |
| CN110818138A (en) * | 2019-11-22 | 2020-02-21 | 陕西北元化工集团股份有限公司 | Chlor-alkali wastewater treatment method |
| CN114524582A (en) * | 2022-01-30 | 2022-05-24 | 陕西北元化工集团股份有限公司 | Recycling device and method for sewage of indirect cooling open type circulating water station in chlor-alkali industry |
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