CN107585968A - 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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- CN107585968A CN107585968A CN201711008992.2A CN201711008992A CN107585968A CN 107585968 A CN107585968 A CN 107585968A CN 201711008992 A CN201711008992 A CN 201711008992A CN 107585968 A CN107585968 A CN 107585968A
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Abstract
The invention discloses a kind of chlor-alkali brine waste processing system and method, including acetylene generator, polyplant and soda equipment；Acetylene generator connects with acetylene supernatant liquid processing device, and acetylene supernatant liquid processing device is connected with cement plant；Polyplant connects with polymeric mother liquid water biochemical treatment apparatus, polymeric mother liquid water biochemical treatment apparatus connects polymeric mother liquid water depth processing unit, polymeric mother liquid water depth processing unit is communicated to production waste water biochemical treatment device again, and production waste water biochemical treatment device connects Treated sewage reusing device with sanitary sewage biochemical treatment apparatus；Soda equipment connects 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, is finally reached the purpose of environmental protection.
Description
Technical field
The invention belongs to chlor-alkali enterprises brine waste process field, and in particular to caused useless during a kind of chlor-alkali production
Water treatment system and method.
Background technology
Coal resources in China and water resource are in contrary distribution, and the Northwest builds large chemical complex and more highlighted economy
Contradiction between development and environmental bearing capacity.In recent years, national environmental protection policy proposes more and more tighter to industrial wastewater treatment
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 turns into 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, intractability.It is most
Qualified discharge after enterprise reprocesses to such strong brine, still suffers from that water utilization rate is not high and problem of environmental pollution.One
Some Enterprises are then further concentrated using the anti-permeable membrane of concentrated water, and waste water zero emission is then realized by the way of evaporative crystallization.So
And the processing of strong brine caused by the former is more difficult, Sewage treatment rate is relatively low；The latter's investment cost and operating cost are higher,
And carnallite processing is still more intractable caused by crystallization.
The content of the invention
To solve drawbacks described above present in prior art, at a kind of chlor-alkali brine waste
System and method is managed, in fully each device area waste water characteristic of analysis chlor-alkali internal system, with water requirement and internal water balance studies
On the basis of, optimize all kinds of waste water sub-prime classified utilization schemes, reduce final waste water total amount, and final waste water is carried out at concentration
Reuse is managed, high efficient utilization of water resources is realized, is finally reached the purpose of environmental protection.
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 connects with acetylene supernatant liquid processing device, acetylene supernatant liquid processing device and cement plant
It is connected；
The polyplant connects with 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 communicated to production waste water biochemical treatment device again, produces
Waste water biochemical treatment device connects Treated sewage reusing device with sanitary sewage biochemical treatment apparatus；
The soda equipment connects 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 further connect production waste water biochemical treatment device, sanitary sewage biochemical treatment apparatus,
Between power plant desulfurization device, pure water waterwheel and water station is circulated, is further communicated 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 communicated to cement plant through filter-pressing device；Acetylene generator is sequentially connected water scrubber, alkali cleaning
Tower and water smoke supplementary set device are to acetylene cleaning device.
Preferably, the polymeric mother liquid water biochemical treatment apparatus includes the one-level settling tank being connected with polyplant, one-level
Settling tank is sequentially communicated cooling tower, wastewater neutralizer, multi-stage biochemical pond, two level settling tank, sand filter, active carbon adsorber and mistake
Filter, sand filter are further communicated to sludge vacuum dewatering system to wastewater neutralizer with active carbon adsorber.
Preferably, the polymeric mother liquid water depth processing unit includes the filter water 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 are entered
One step connects the wastewater neutralizer of polymeric mother liquid water biochemical treatment apparatus.
Preferably, it is described 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 regulating reservoir, and sanitary sewage regulating reservoir is successively
The sludge of connection flocculation sedimentation tank, anaerobic pond, Aerobic Pond and second pond, second pond and flocculation sedimentation tank is after filter press press filtration
Filtrate is communicated to regulating reservoir.
Preferably, the Treated sewage reusing device includes and the second pond of sanitary sewage biochemical treatment apparatus and production waste water life
Change the more medium filter II that the intermediate pool of processing unit is connected, more medium filter II is sequentially communicated fine filter, surpassed
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
Put, 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
Circulate between water station or pure water waterwheel.
Correspondingly, The present invention gives the method for wastewater treatment of chlor-alkali brine waste processing system, comprise 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 press filtration are back to supernatant liquid pool, and filter cake is delivered to cement plant area
Produce cement；The acetylene gas of acetylene generator output drains into through water scrubber, caustic wash tower to water smoke supplementary set device, caused waste water
Peace and quiet buffering water pot, then with being pumped to acetylene generator reuse；
2) mother liquid coming caused by polyplant first separates resin through one-level settling tank, and the mother liquid coming after separation is through cooling tower
Enter wastewater neutralizer regulation pH value after cooling；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 two level settling tank, and upper clear supernate is through sand filter, activated carbon
Absorber filtering enters filtered water reservoir, delivers to acetylene generator, circulation water station and mother liquid coming advanced treatment apparatus respectively；Bottom
Sludge delivers to sludge vacuum dewatering system, and the backwash water of the waste water taken off and sand filter and active carbon adsorber is back in waste water
And pond；Other production waste water of polyplant area enter wastewater neutralizer after water vaporization tower reclaims 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, milipore filter
Device I further removes useless impurities in water, then further reduction has through biological activated carbon system and organic matter resin adsorption device
Machine thing, finally by ion exchange system by mother liquor water handling reclamation；More medium filter I, the backwash water of ultra-filtration membrane device I pass through
Pipeline is back to wastewater neutralizer, and ion exchange system regenerative wastewater delivers to production wastewater biochemical processing dress after entering regenerated pond
Put；
4) regenerative wastewater of soda equipment and other production waste water enter neutralizing water tank, and removing system by free chlorine removes
After free chlorine, water up to standard, which is delivered to, to be adopted halogen transportation device and is used to note well and adopt halogen；
5) the regulating reservoir regulation pH that water station sewer enters production waste water biochemical treatment device with other production waste water is circulated
Value, then deliver to flocculation basin and add aluminium polychloride, polyacrylamide flocculant, enter back into inclined plate sedimentation pond, the wadding of bottom deposit
Body delivers to filter press, and after filter cake dries and boiler burning disposal is sent into raw coal blending；Pressing filtering liquid enters regulating reservoir, inclined plate sedimentation pond
Water outlet further reduces 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 sewage treatment unit balancing tank, delivers to flocculation sedimentation tank and removes large granular impurity
Afterwards, overflow enter anaerobic pond, Aerobic Pond and second pond processing it is qualified after, for Treated sewage reusing device or green area irrigation；Flocculation is heavy
The filtrate of shallow lake pond and second pond base sludge after press filtration is back to regulating reservoir by tube overflow；
7) the production waste water after waste water biochemical treatment device processing and the life after sewage treatment unit processing are produced
Sewage is gone to clean through more medium filter II and fine filter, and impurity and suspension are reduced by ultra-filtration membrane device II；It is wherein super
Filter fresh water enters ultrafiltration pond, adds non oxidizing bactericide；The backwash water of more medium filter II and ultrafiltration concentrated water are back to life
Produce wastewater biochemical disposal plant front end and carry out biochemical treatment again；Fresh water is respectively fed to reverse osmosis membrane and NF membrane in ultrafiltration pond
Device, reverse osmosis freshwater deliver to front end or circulation water station between waterwheel processed, and nanofiltration fresh water, which is delivered to adopt halogen transportation device and be used to noting well, adopts halogen；
Reverse osmosis concentrated water and nanofiltration concentrated water enter coagulative precipitation tank processing it is qualified after, deliver 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, contact-oxidation pool aeration, protects
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 NF membrane is FILMTECTMIt is rich resistance toTMXC70, XC80, XC-N or NF-2540；
The milipore filter is AQU200 milipore filters, HUF10-200 milipore filters or SFP2660 Tao Shi milipore filters.
The beneficial effects of the present invention are：
The present invention fully combines chlorine industry itself productive prospecting, for different types of waste water, optimization waste water sub-prime point
Level Land use systems, maximumlly realize cycling utilization of wastewater, reduce final wastewater discharge；Realizing that waste water zero emission is same
When, when final sewage treatment facility designs, enterprises are taken into full account 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
The purpose of environmental protection.
Brief description of the drawings
Fig. 1 is present system block diagram；
Fig. 2 is acetylene supernatant liquid processing device structured flowchart；
Fig. 3 is polymeric mother liquid water biochemical treatment apparatus structured flowchart；
Fig. 4 is polymeric mother liquid water depth processing unit structured flowchart；
Fig. 5 is production waste water biochemical treatment device structured flowchart；
Fig. 6 is sewage treatment unit structured flowchart；
Fig. 7 is Treated sewage reusing apparatus structure block diagram.
Embodiment
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 connects with acetylene supernatant liquid processing device, and acetylene supernatant liquid processing device is connected with cement plant
It is logical；Polyplant connects with polymeric mother liquid water biochemical treatment apparatus, polymeric mother liquid water biochemical treatment apparatus connection polymeric mother liquid water
Advanced treatment apparatus, polymeric mother liquid water depth processing unit are communicated to production waste water biochemical treatment device again, produce wastewater biochemical
Processing unit connects Treated sewage reusing device with sanitary sewage biochemical treatment apparatus；Soda equipment connects caustic soda wastewater treatment equipment,
Halogen transportation device is adopted in the connection of caustic soda wastewater treatment equipment.Wherein, Treated sewage reusing device further connects production waste biochemical treatment dress
Put, produce between waste water biochemical treatment device, power plant desulfurization device, pure water waterwheel and circulate water station, enter one between pure water waterwheel
Step, which is communicated to, adopts halogen transportation device.
Obtained pure water is used for caustic soda, polymerization and boiler of power plant device, caused negative and positive bed regenerated between pure water waterwheel
Water circulation in adopt halogen device note well adopt halogen.Carbide slag slurries caused by acetylene generator through acetylene supernatant liquid processing device sedimentation and
Supernatant fluid reuse is to acetylene generator, wet carbide slag to cement plant after press filtration.Centrifuge mother liquor water caused by polyplant passes through
After the processing of polymeric mother liquid biochemical treatment apparatus, circulation water station and acetylene generator, the aggregated mother liquor depth of water in part are partly back to
Reuse is to polymerization PVC after spending processing unit.Chelate resin tower regenerative wastewater caused by soda equipment and other waste water are through place
Be back to after reason adopt halogen device note well adopt halogen；Water station sewer and part producing waste water are circulated through producing waste water biochemical treatment device
Handle it is up to standard after deliver to Treated sewage reusing device；Sanitary sewage delivers to Treated sewage reusing dress after sewage treatment unit processing is up to standard
Put or for green area irrigation；Fresh water reuse caused by Treated sewage reusing device to adopting halogen device, circulate front end between water station or waterwheel processed,
Power plant desulfurization device is back to 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 communicated to cement plant through filter-pressing device respectively；Acetylene generator be sequentially connected water scrubber,
Caustic wash tower and water smoke supplementary set device are to acetylene cleaning device.
Neutralized as shown in figure 3, the biochemical treatment of polymeric mother liquid water and reclamation set include one-level settling tank, cooling tower, waste water
Pond, multi-stage biochemical pond, two level settling tank, sand filter, active carbon adsorber, filtered water reservoir, waste water lifting pump and sludge vacuum take off
Water system.One-level settling tank is connected with polyplant, and one-level settling tank is simultaneously sequentially communicated cooling tower, wastewater neutralizer, multistage life
Change pond, two level settling tank, sand filter, active carbon adsorber and filtered water reservoir, sand filter further to connect with active carbon adsorber
To sludge vacuum dewatering system to wastewater neutralizer.
In polymerization process caused mother liquid coming through one-level settling tank remove part Corvic, then deliver to cooling tower,
Wastewater neutralizer, multi-stage biochemical pond, two level settling tank, sand filter, active carbon adsorber, last water up to standard to filtered water reservoir, lead to
Cross waste water lifting and be pumped to recirculated 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 reclaims 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, middle 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, middle 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 further connects the wastewater neutralizer of polymeric mother liquid water biochemical treatment apparatus.
In filtered water reservoir qualified mother liquid coming it is boosted be pumped to more medium filter I, ultra-filtration membrane device I further remove it is useless
Impurities in water, then further reduce useless Organic substance in water through biological activated carbon system and organic matter resin adsorption device, it is desirable to have
Machine thing content is less than 2ppm, and mother liquor water process is reached into polymerization water requirement finally by ion exchange system, is back to polymerization
Kettle produces PVC.More medium filter I, the backwash water of ultra-filtration membrane device I are back to wastewater neutralizer, ion exchange system by pipeline
Regenerative wastewater delivers to production waste water biochemical treatment device after entering regenerated pond.
Caustic soda wastewater treatment equipment includes neutralizing water tank, free chlorine removes 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, which is delivered to adopt halogen transportation device and be used to noting well, adopts halogen.
As shown in figure 5, production waste water biochemical treatment device includes production wastewater equalization pond, production wastewater equalization pond connects successively
Logical flocculation basin, inclined plate sedimentation pond, hydrolysis acidification pool, contact-oxidation pool, second pond and intermediate pool.
Circulate water station sewer and other production waste water enter the regulating reservoir of production waste water biochemical treatment device, by pH value control
System is pumped to flocculation basin, inclined plate sedimentation pond in 7-8, then through producing waste water lifting, after large granular impurity is removed, through hydrolysis acid
After change, contact-oxidation pool, second pond processing are qualified, into intermediate pool.
As shown in fig. 6, sewage treatment unit includes regulating reservoir, flocculation sedimentation tank, anaerobic pond, Aerobic Pond, second pond
And sludge dewatering system.Sanitary sewage regulating reservoir is sequentially communicated flocculation sedimentation tank, anaerobic pond, Aerobic Pond and second pond, second pond
Regulating reservoir is communicated to the filtrate of the sludge of flocculation sedimentation tank after filter press press filtration.
Sanitary sewage enters balancing tank, and being pumped to flocculation sedimentation tank through sanitary sewage lifting goes out after large granular impurity,
Overflow enter anaerobic pond, Aerobic Pond, second pond processing it is qualified after deliver to Treated sewage reusing device or for green area irrigation.Flocculation is heavy
Shallow lake pond and second pond base sludge are back to regulating reservoir through sludge pumping to plate and frame filter press, filtrate 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 connects successively
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 is entered after more medium filter and fine filter remove large granular impurity by ultra-filtration membrane device
One step reduces the impurity and suspension in waste water, and wherein ultrafiltration fresh water enters ultrafiltration pond, more medium filter backwash water and surpasses
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, and front end is used to prepare between reverse osmosis freshwater delivers to waterwheel processed
Pure water delivers to circulation water station, and nanofiltration fresh water, which is delivered to, to be adopted halogen transportation device and be used to note well and adopt halogen.Reverse osmosis concentrated water and nanofiltration concentrated water are entered
Enter coagulative precipitation tank processing it is qualified after, deliver to acetylene occur and power plant desulfurization device.
Chlor-alkali salt-containing waste water treatment method of the present invention, comprises the steps：
1) entered from the solid content that acetylene generator comes out in 10-12% carbide slag slurries by aqueduct overflow and concentrated
Pond.After concentrated, upper clear supernate overflow enters supernatant liquid pool, then cools the temperature to less than 50 DEG C through cooling tower and be back to acetylene hair
Raw, dense carbide slag slurries of the bottom solid content more than 20% are delivered to plate and frame filter press through Pulp pump, and filtrate is back to supernatant
Pond, filter cake produce cement using Belt Conveying to cement plant area.Acetylene unit area water scrubber, water smoke supplementary set device, positive/negative-pressure water
Draining is sealed 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, and finally realizes waste water zero emission inside acetylene unit area.
2) mother liquid coming that polymeric size centrifuge comes out first is divided the resin in mother liquid coming through one-level settling tank
From the mother liquid coming after separation enters wastewater neutralizer after waste water lifting is pumped to cooling tower cooling, and regulation pH value is 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
Material is supported, control dissolved oxygen is in 1-3mg/l, and 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 two level settling tank, and upper clear supernate is through sand filter, work
Property the filtering of charcoal absorber enter pond after filtering, then through waste water lifting be pumped to acetylene occur, circulation water station and mother liquor water depth
Processing unit, base sludge is through sludge pumping to sludge vacuum dewatering system, the waste water and sand filter taken off, activated carbon filtering
Device backwash water passes through back of pipeline to multistage biochemistry pool front end.Other production waste water of polyplant area reclaim 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 the biochemical treatment of table 1：
| 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 |
| Electrical 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 milipore filter can be milipore filter
AQU200, milipore filter HUF10-200, Tao Shi milipore filter SFP2660, delivery turbidity are less than 1；Again through biological activated carbon system and having
Machine resin adsorbent equipment further reduces 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, the backwash water of ultra-filtration membrane device I pass through
Pipeline is back to wastewater neutralizer, and ion exchange system regenerative wastewater delivers to production wastewater biochemical processing dress after entering regenerated pond
Put.Mother liquid coming advanced treatment apparatus disengaging water quality index is shown in Table 2.
The mother liquid coming advanced treatment apparatus of table 2 passes in and out water quality index：
| 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 |
| Electrical 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 removes system.Soda equipment chelate resin tower regenerates
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, which is delivered to, afterwards adopts halogen transportation device and is used to note well and adopt halogen.It is solid that soda equipment area includes the processing of chlorine hydrogen, electrolysis unit and evaporation
Alkali device, electrolysis neutralizing water tank is delivered to after machine water shutoff, production wastewater collection caused by the processing of chlorine hydrogen；Evaporate alkalescence caused by solid caustic soda
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
Put 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 and
Salkali waste adjusts pH value in 8-9, adds sodium sulfite powder, by free chlorine control in waste water below 0, qualified waste water neutralization
Water pump deliver 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) producing waste water biochemical treatment device includes wastewater equalization pond, flocculation basin, inclined plate sedimentation pond, hydrolysis acidification pool, connects
Touch oxidation pond, second pond and intermediate pool.Circulation water station sewer and other production waste water enter regulating reservoir, and pH value control is existed
7-8, then flocculation basin is pumped to through producing waste water lifting, the flocculants such as aluminium polychloride, polyacrylamide are added, are stirred,
Flocculant and waste water is fully contacted mixing, enter back into inclined plate sedimentation pond.The flco of inclined plate sedimentation pond bottom deposit is through sludge pump
Filter press is delivered to, after filter cake dries and boiler burning disposal is sent into raw coal blending.Enter one through hydrolysis acidification pool and contact-oxidation pool
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, is protected
Dissolved oxygen is held in 2-4mg/L；After second pond 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 index：
| Index | After processing |
| PH value | 6.5-7.5 |
| COD/mg/L | 30-60 |
| Ammonia nitrogen/mg/L | 4-5 |
| SS | 10-15 |
6) sewage treatment unit takes off including regulating reservoir, flocculation sedimentation tank, anaerobic pond, Aerobic Pond, second pond and sludge
Water system.Sanitary sewage enters balancing tank, after sanitary sewage lifting is pumped to flocculation sedimentation tank removing large granular impurity, overflows
Stream into anaerobic pond, Aerobic Pond, second pond processing it is qualified after, for Treated sewage reusing device or green area irrigation.Flocculation sedimentation tank and
Second pond base sludge is back to regulating reservoir through sludge pumping to plate and frame filter press, filtrate by tube overflow.Produce wastewater biochemical
Processing unit Inlet and outlet water water quality index is shown in Table 4.
Table 4 produces waste water biochemical treatment device Inlet and outlet water water quality index：
| Index | After processing |
| PH value | 6-9 |
| COD/mg/L | 100 |
| Ammonia nitrogen/mg/L | 25 |
7) Treated sewage reusing device include 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 removes through more medium filter and fine filter
After large granular impurity, impurity and suspension in waste water are further reduced by ultra-filtration membrane device, milipore filter can be milipore filter
AQU200, milipore filter HUF10-200, Tao Shi milipore filter SFP2660, delivery turbidity are less than 1；Wherein ultrafiltration fresh water enters ultrafiltration water
Pond, add microorganism in non oxidizing bactericide control waste water and grow, reduce pollution of the organic matter to film, non oxidizing bactericide
Can be Tao Shi water treatment biocide AQUCARTM RO-20, AQUCAR RO-150AQUCAR RO-8536 etc..Multi-medium filtering
Device backwash water and ultrafiltration concentrated water are back to production wastewater biochemical disposal plant front end by pipeline and carry out biochemical treatment again.Ultrafiltration
Fresh water can be through waste water lifting pump, high-pressure pump feeding reverse osmosis membrane and nano filter membrance device, wherein reverse osmosis membrane in pond
FILMTECTMIt is rich resistance toTMCR100, FILMTEC BW30-365FR and FILMTEC BW30-365, NF membrane can be
FILMTECTMIt is rich resistance toTMXC70, XC80, XC-N and NF-2540 etc..Front end is pure for preparing between reverse osmosis freshwater delivers to waterwheel processed
Water delivers to circulation water station, and nanofiltration fresh water, which is delivered to, to be adopted halogen transportation device and be used to note well and adopt halogen.Reverse osmosis concentrated water and nanofiltration concentrated water enter
After coagulative precipitation tank processing is qualified, delivers to acetylene and occur and power plant desulfurization device.Treated sewage reusing device Inlet and outlet water water quality index is shown in
Table 5.
The Treated sewage reusing device Inlet and outlet water water quality index of table 5：
As can be seen from the above Table 5, the chlor-alkali brine waste that the system through the present invention is handled, its TOC of reverse osmosis membrane fresh water
Less than 1mg/L, NF membrane fresh water is less than 7mg/L；Reverse osmosis membrane fresh water bivalent metal ion is less than 0.3mg/L, NF 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 NF membrane fresh water is less than
10mg/L.There is preferable water quality through the chlor-alkali brine waste handled by present system, " the zero-emission of waste water can be realized
Put ".
The invention is not limited in above-described embodiment, on the basis of technical scheme disclosed by the invention, the skill of this area
Art personnel are according to disclosed technology contents, it is not necessary to which performing creative labour can makes one to some of which technical characteristic
A little to replace and deform, these are replaced and deformation is within the scope of the present invention.
Claims (10)
1. a kind of chlor-alkali brine waste processing system, it is characterised in that filled including acetylene generator, polyplant and caustic soda
Put；
The acetylene generator connects with acetylene supernatant liquid processing device, and acetylene supernatant liquid processing device is connected with cement plant
It is logical；
The polyplant connects with 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 communicated to production waste water biochemical treatment device again, produce waste water
Biochemical treatment apparatus connects Treated sewage reusing device with sanitary sewage biochemical treatment apparatus；
The soda equipment connects 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 further connects production waste water biochemical treatment device, sewage treatment unit, power plant desulfurization
Between device, pure water waterwheel and water station is circulated, is further communicated between pure water waterwheel and adopts halogen transportation device.
2. a kind of chlor-alkali brine waste processing system according to claim 1, it is characterised in that at the acetylene supernatant
Reason device includes the acetylene concentration basin and cooling tower being connected with acetylene generator, and acetylene concentration basin and cooling tower are through filter-pressing device
It is communicated to cement plant；Acetylene generator is sequentially connected water scrubber, caustic wash tower, water smoke supplementary set device to acetylene cleaning device.
3. a kind of chlor-alkali brine waste processing system according to claim 1, it is characterised in that the polymeric mother liquid is aquatic
Changing processing unit includes the one-level settling tank that is connected with polyplant, one-level settling tank be sequentially communicated cooling tower, wastewater neutralizer,
Multi-stage biochemical pond, two level settling tank, sand filter, active carbon adsorber and filtered water reservoir, sand filter enter one with active carbon adsorber
Step is communicated to sludge vacuum dewatering system to wastewater neutralizer.
A kind of 4. chlor-alkali brine waste processing system according to claim 3, it is characterised in that the polymeric mother liquid depth of water
Degree processing unit includes the more medium filter I being connected with the filtered water reservoir of polymeric mother liquid water biochemical treatment apparatus, multimedium
Filter I is sequentially communicated ultra-filtration membrane device I, intermediate pool, biological activated carbon system, organic matter resin adsorption device, ion and handed over
Change system and waste water reclamation pond；More medium filter further connects polymeric mother liquid water biochemical treatment apparatus with ultra-filtration membrane device I
Wastewater neutralizer.
A kind of 5. chlor-alkali brine waste processing system according to claim 4, it is characterised in that the production wastewater biochemical
Processing unit includes production wastewater equalization pond, and production wastewater equalization pond is sequentially communicated flocculation basin, inclined plate sedimentation pond, hydrolysis acidification
Pond, contact-oxidation pool, secondary sedimentation tank and intermediate pool.
6. a kind of chlor-alkali brine waste processing system according to claim 1, it is characterised in that the sanitary sewage is biochemical
Processing unit includes sanitary sewage regulating reservoir, and sanitary sewage regulating reservoir is sequentially communicated flocculation sedimentation tank, anaerobic pond, Aerobic Pond and two
Filtrate of the sludge of heavy pond, second pond and flocculation sedimentation tank after filter press press filtration is communicated to regulating reservoir.
A kind of 7. chlor-alkali brine waste processing system according to claim 6, it is characterised in that the Treated sewage reusing device
Intermediate pool including the second pond with sanitary sewage biochemical treatment apparatus and production waste water biochemical treatment device is connected more
Medium filter II, more medium filter II are sequentially communicated fine filter, ultra-filtration membrane device II, ultrafiltration pond and micron essence filtering
Device, micron fine filter are respectively communicated with nano filter membrance device and reverse osmosis membrane apparatus, and nano filter membrance device is respectively communicated with coagulative precipitation tank
With adopt halogen transportation device, reverse osmosis membrane apparatus is respectively communicated between coagulative precipitation tank and circulation water station or pure water waterwheel.
8. a kind of method of wastewater treatment of the chlor-alkali brine waste processing system described in any one of claim 1-7, its feature exist
In 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 and filled
Put, filtrate of the dense carbide slag slurries in bottom after filter press press filtration is back to supernatant liquid pool, and filter cake is delivered to the production of cement plant area
Cement；The acetylene gas of acetylene generator output is through water scrubber, caustic wash tower to water smoke supplementary set device, and caused waste water draining is to clear
Net buffering water pot, then with being pumped to acetylene generator reuse；
2) mother liquid coming caused by polyplant first separates resin through one-level settling tank, and the mother liquid coming after separation is through cold water tower cooler
Enter wastewater neutralizer regulation pH value afterwards；In multi-stage biochemical reaction tank, flour, urea, sodium dihydrogen phosphate and saccharomycete are added
Mother liquid coming of the dissolved oxygen after 1-3mg/l, biochemistry is controlled to enter two level settling tank, upper clear supernate is through sand filter, charcoal absorption
Device filtering enters filtered water reservoir, delivers to acetylene generator, circulation water station and mother liquid coming advanced treatment apparatus respectively；Base sludge
Sludge vacuum dewatering system is delivered to, the backwash water of the waste water taken off and sand filter and active carbon adsorber is back to waste water neutralization
Pond；Other production waste water of polyplant enter wastewater neutralizer after water vaporization tower reclaims 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 organic matter is further reduced 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, the backwash water of ultra-filtration membrane device I pass through pipeline
Wastewater neutralizer is back to, ion exchange system regenerative wastewater delivers to production waste water biochemical treatment device after entering regenerated pond；
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, which is delivered to, to be adopted halogen transportation device and is used to note well and adopt halogen；
5) the regulating reservoir regulation pH value that water station sewer enters production waste water biochemical treatment device with other production waste water is circulated, then
Deliver to flocculation basin and add aluminium polychloride, polyacrylamide flocculant, enter back into inclined plate sedimentation pond, the flco of bottom deposit is delivered to
Filter press, after filter cake dries and boiler burning disposal is sent into raw coal blending, and pressing filtering liquid enters regulating reservoir；Inclined plate sedimentation pond water outlet warp
Hydrolysis acidification pool and contact-oxidation pool further reduce wastewater through organic matter, control hydrolysis acidification pool dissolved oxygen, aeration；At second pond
Manage it is qualified after, into intermediate pool；
6) sanitary sewage enters balancing tank in sewage treatment unit, after delivering to flocculation sedimentation tank removing large granular impurity,
Overflow enter anaerobic pond, Aerobic Pond and second pond processing it is qualified after, for Treated sewage reusing device or green area irrigation；Flocculation sedimentation tank
Regulating reservoir is back to by tube overflow with filtrate of the second pond base sludge after press filtration；
7) the production waste water after waste water biochemical treatment device processing and the sanitary sewage after sewage treatment unit processing are produced
Go to clean through more medium filter II and fine filter, the impurity and suspension in waste water are reduced by ultra-filtration membrane device II；Its
Middle ultrafiltration fresh water enters ultrafiltration pond, adds non oxidizing bactericide；The backwash water of more medium filter II 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 received in ultrafiltration pond
Filter membrane device, reverse osmosis freshwater deliver to front end or circulation water station between waterwheel processed, and nanofiltration fresh water, which is delivered to, adopts halogen transportation device for noting well
Adopt halogen；Reverse osmosis concentrated water and nanofiltration concentrated water enter coagulative precipitation tank processing it is qualified after, deliver to acetylene and occur and power plant desulfurization device.
9. the method for wastewater treatment of chlor-alkali brine waste processing system according to claim 8, it is characterised in that the step
It is rapid 5) in, control hydrolysis acidification pool dissolved oxygen is less than 0.2mg/L, and contact-oxidation pool aeration, holding dissolved oxygen is in 2-4mg/L.
10. the method for wastewater treatment of chlor-alkali brine waste processing system according to claim 8, it is characterised in that described
In 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 FILMTECTM rich resistance to TMCR100, FILMTEC BW30-365FR or FILMTEC BW30-365；
The NF membrane is FILMTECTM rich resistance to TMXC70, XC80, XC-N or NF-2540；
The milipore filter is AQU200 milipore filters, HUF10-200 milipore filters or SFP2660 Tao Shi milipore filters.
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