CN205687743U - A kind of processing system of chlor-alkali plant strong brine zero-emission - Google Patents
A kind of processing system of chlor-alkali plant strong brine zero-emission Download PDFInfo
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- CN205687743U CN205687743U CN201620536571.1U CN201620536571U CN205687743U CN 205687743 U CN205687743 U CN 205687743U CN 201620536571 U CN201620536571 U CN 201620536571U CN 205687743 U CN205687743 U CN 205687743U
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Abstract
This utility model belongs to field of waste water treatment, proposes the processing system of a kind of chlor-alkali plant strong brine zero-emission, including primary concentration system, secondary concentration system and three grades of concentration systems.This utility model selects to use three grades of concentration techniques, primary concentration processes and includes chemical tendering+A/O MBR membrane bioreactor+anti-pollution reverse-osmosis, the response rate of feasible system more than 66%, TDS in dense water is concentrated into about 30g/l by secondary concentration system, and TDS in dense water is concentrated into about 100g/l by three grades of concentration systems.A whole set of response system only has the haline water of 1%～2% and enters evaporation and crystallization system, the response rate of feasible system more than 99%.
Description
Technical field
This utility model belongs to field of waste water treatment, is specifically related to the processing system of the waste water that a kind of chlor-alkali plant is discharged.
Background technology
Last decade, polrvinyl chloride (PVC) demand sharply increases, and within 2014, domestic PVC production capacity reaches 23,000,000 tons, accounts for
World's PVC production capacity 60.5%.Domestic PVC manufacturing enterprise many employings carbide, needs to consume substantial amounts of freshwater resources, production unit
PVC needs 25 tons of water, calculates by 1,000,000 tons of PVC production capacity, needs 25,000,000 tons of water year, through general waste water treatment process
After process, waste water reclamation rate is only 60%, year waste discharge amount be up to 10,000,000 tons.And most of PVC manufacturing enterprises all positions
In western coal producing region, the area of water scarcity the most just, by shipwreck, energy consumption is high, pollute the problem such as big seriously constrains enterprise
Industry develops.Along with the raising with water cost, blowdown controls the increasing of dynamics, and effective technology for treating industrial waste water becomes water saving and subtracts
The important means of row.
The most a lot of PVC enterprises are circulated by full factory water of making rational planning for, and classification processes each workshop section waste water, use materialization, life
The water such as change process means so that effluent part is back to the production unit the highest to water quality requirement.In order to improve waste water
Recycling rate of waterused, reverse osmosis membrane technology becomes the important means of waste water recycling, has had the most in the industrial production and be widely applied.
Although reverse osmosis membrane technology can lifting waste water reclamation rate, but its reuse ability only has 70%-80%, still has 20%-
The strong brine of the complicated component of about 30% produces, and this effluent part is due to containing higher hardness, heavy metal ion, silicon, many
Planting salt and Organic substance, intractability is big, and processing cost is high, and most enterprises are that simple process is the most directly discharged, severe contamination
Water environment；Also some enterprise carries out secondary counter osmosis concentration to reverse osmosis concentrated saline or direct evaporation crystallizes, but both sides
Formula investment, operating cost height, the process of the strong brine that the former produces again is more difficult, and the latter crystallizes the mixed salt of generation need to be by danger
Useless process, treatment effect is the most undesirable, and according to current environment protection emission requirement, the comprehensive utilization further of dense water is extremely the most urgent.
Utility model content
The weak point existed for this area, the purpose of this utility model is to propose a kind of chlor-alkali plant strong brine zero-emission
Processing system.
The technical scheme realizing this utility model purpose is:
The processing system of a kind of chlor-alkali plant strong brine zero-emission, including primary concentration system, secondary concentration system and three grades
Concentration systems；
Described primary concentration system includes dense water regulating reservoir and the chemical tendering pond being sequentially connected with, and described chemical tendering pond is even
It is connected to chemical tendering clear water reserviors and sludge dewatering unit；Described chemical tendering clear water reserviors connect catalytic ozonation pond, described
The outlet pipeline in catalytic ozonation pond connects A/O-MBR membrane bioreactor, and the product mouth of a river of A/O-MBR membrane bioreactor is even
Being connected to two-stage nitration reverse osmosis units, the outlet pipeline of described two-stage nitration reverse osmosis units connects product Water circulation pond；Two-stage nitration is reverse osmosis concentrated
Water lines enters the reverse osmosis concentrated pond of two-stage nitration, subsequently into secondary concentration system；
Described secondary concentration system includes the resin pliable cell nano-filtration unit being sequentially connected with, the product water of described nano-filtration unit
Pipeline is sequentially connected with high pressure reverse osmosis units, the first high-pressure flat plate film unit, the outlet of described first high-pressure flat plate film unit
Connecting described product Water circulation pond by pipeline, the dense water lines of the first high-pressure flat plate film unit enters the first dense water of high-pressure flat plate film
Pond, subsequently into described three grades of concentration systems；The dense water lines of described nano-filtration unit is sequentially connected with filter and the second high-voltage flat
Plate film unit, the outlet of described second high-pressure flat plate film unit connects described product Water circulation pond by pipeline；Second high-voltage flat
The dense water lines of plate film unit enters the second dense pond of high-pressure flat plate film, subsequently into described three grades of concentration systems；
Described three grades of concentration systems include the first Membrane Materials unit and the second Membrane Materials unit, described first high-pressure flat plate film
The dense water lines of unit connects the first Membrane Materials unit, and the water producing pipe road of described first Membrane Materials unit connects described product Water circulation
Pond；The dense water lines of described second high-pressure flat plate film unit connects the second Membrane Materials unit, described second Membrane Materials unit of cells
Water producing pipe road connects described product Water circulation pond.
Wherein, in described primary concentration system, the product mouth of a river of A/O-MBR membrane bioreactor connects has MBR to produce pond,
MBR produces pond has the first cartridge filter by pipeline and low-lift pump connection, then connects described two-stage nitration reverse osmosis through high-pressure pump
Unit, described low pressure pump lift is 10～100m, and described high pressure pump lift is 100～1600m.
Wherein, in described secondary concentration system, the outlet pipeline of resin pliable cell enters resin and softens clear water reserviors, resin
Soften clear water reserviors and have the second cartridge filter by pipeline and low-lift pump connection, then connect described nano-filtration unit through high-pressure pump.
Further, in described secondary concentration system, the water producing pipe road of described nano-filtration unit enters nanofiltration and produces pond, passes through
Pipeline and low-lift pump connect the 3rd cartridge filter, then connects described high pressure reverse osmosis units through high-pressure pump；Described low pressure
Pump lift is 10～100m, and described high pressure pump lift is 100～1600m.
The water producing pipe road of described high pressure reverse osmosis units connects produces Water circulation pond, and dense water lines connects described first high-voltage flat
Plate film unit, is provided with bitter film or sea water desalination membrane in described high pressure reverse osmosis units.
Bitter film or sea water desalination membrane are commercial, and all there is production in the enterprise such as Tao Shi, Hydranautics, toray, GE.
The dense water lines of described nano-filtration unit enters the dense water pot of nanofiltration, and being connected by pipeline and low-lift pump has mechanical filter
Device, then connect the 5th cartridge filter through pipeline and low-lift pump；5th cartridge filter connects the through pipeline and high-pressure pump
Two high-pressure flat plate film units.
Because high-pressure flat plate film device, high pressure reverse osmosis equipment influent side pressure are high, so can not raise with conventional tens meters
The pump of journey.Wherein, described low pressure pump lift is 10～100m, and described high pressure pump lift is 100～1600m.
Wherein, in described three grades of concentration systems, the dense water lines of described first Membrane Materials unit enters the saline of Caustic soda factory
System；
The dense water lines of described second Membrane Materials unit connects evaporation crystallization equipment, and evaporation water lines connects described product water and returns
Use pond.
Further, described processing system also includes sludge treating system, connects described dirt bottom described chemical tendering pond
Mud treatment system；Described sludge treating system includes device for dehydrating sladge waste.
The processing method of a kind of chlor-alkali plant strong brine zero-emission, uses the processing system that the utility model proposes, including with
Lower step:
Primary concentration processes: add the one in Calx, soda, coagulant, flocculation aid or many to chlor-alkali plant strong brine
Kind, make the mud-water separation of strong brine, the water outlet on upper strata add ozone and hydrogen peroxide, be then passed through A/O-MBR film biological unit,
The process of two-stage nitration reverse osmosis units, product water enters and produces Water circulation pond, and dense water carries out secondary concentration process；
Secondary concentration processes: dense water softens through macropore cation resin or chelate resin, nanofiltration membrane, and nanofiltration water outlet is again
Through high pressure reverse osmosis membrane processing, water outlet enters produces Water circulation pond, and dense water carries out three grades of concentration；The dense water of nanofiltration is through high-voltage flat
Plate film processes, and product water enters and produces Water circulation pond, and dense water carries out three grades of concentration；
Three grades of concentration: the dense water that high pressure reverse osmosis membrane processing produces is evaporated concentrating, product water enters product water and returns
With pond, dense water enters Caustic soda factory brine system to carry out producing reuse；
Nanofiltration dense water side high-pressure flat plate film processes the dense water produced and is evaporated concentrating, and product water enters and produces Water circulation pond,
Dense water is evaporated crystallization, and evaporation is produced water and entered product Water circulation pond, and the solid salt that crystallization generates is then as the dry salt of solid waste
Dispose.
The chlor-alkali plant strong brine that described method is targeted, produces the waste water that polrvinyl chloride produces, its pollutant for carbide
Complicated component, the COD in waterCr100～500mg/L, BOD 20～300mg/L, SS 50-500mg/L, miscellaneous possibly together with other
Matter, including phosphide 0～80mg/L, sulfide 100～300mg/L.
Further, the materialized mud mixing of chemical tendering pond discharge flows into sludge treating system, then defeated by sludge pump
Deliver to sludge dewatering system dehydration, deliver to cement production device after dehydration after mud cake and realize innoxious place as cement producting material
Reason.
The pressing filtering liquid of sludge dewatering and sludge dewatering equipment flushing water are back to dense water regulating reservoir and are further processed.
Wherein, during described primary concentration processes, add into Calx 100～300mg/L, soda 200 to chlor-alkali plant strong brine
～400mg/L, coagulant 2～50mg/L, flocculation aid 0～10mg/L, described coagulant is bodied ferric sulfate, aluminum sulfate, trichlorine
Change ferrum, aluminium polychlorid (PAC), polyaluminium sulfate (PAS), poly-ferric chloride (PFC), poly-silicic acid iron sulfate (PFSS), poly-phosphorus
One or more in iron chloride (PPFC), poly-phosphorus aluminum chloride (PPAC), ferric-polysilicate (PSF), described flocculation aid is selected from poly-third
One or more in acrylamide, activated silicic acid (or claiming activated silica), osseocolla, sodium alginate.
During primary concentration processes, ozonator is utilized to put into ozone 10～100mg/L, employing work to chlor-alkali plant strong brine
The hydrogen peroxide of industry level 10-15%, input amount 2～100mg/L.Ozonator can process parameter control flow.
The beneficial effects of the utility model are:
This utility model three grades of concentration techniques of employing:
Primary concentration processes: chemical tendering+A/O-MBR membrane bioreactor+anti-pollution reverse-osmosis, feasible system 66%
The above response rate, is concentrated into about 30g/l by the TDS in dense water, influent COD is down to below 100mg/l；
Secondary concentration processes: antipollution nanofiltration+high pressure reverse osmosis+high-pressure flat plate film, the response rate of feasible system 90%,
And by point salt of nanofiltration system, nanofiltration is produced Water Sproading rate and is up to more than 85%, and secondary concentration system is by dense for the TDS in dense water
It is reduced to about 30g/l；
Three grades of concentration: nanofiltration produces water by being directly entered Caustic soda factory saline after secondary concentration technique and membrane distillation technique
Reclaiming system；The dense water of nanofiltration, can by Membrane Materials system by entering Membrane Materials and evaporation and crystallization system after secondary concentration technique
TDS in dense water is concentrated into about 200g/l, and a whole set of response system only has the haline water of 1%～2% and enters evaporative crystallization system
System, the response rate of feasible system more than 99%；
System discharge chemical sludge and biological sludge are transported to cement production system as raw material after being dehydrated by dewatering system
Harmless treatment.
Accompanying drawing explanation
Fig. 1 is the process chart of the processing system of a kind of chlor-alkali plant strong brine zero-emission that the utility model proposes.
Fig. 2 is primary concentration system structure sketch.
Fig. 3 is secondary concentration system structure sketch.
Fig. 4 is three grades of concentration systems structure diagrams.
In figure: 1-dense water regulating reservoir；2-chemical tendering pond；3-device for dehydrating sladge waste；4-chemical tendering clear water reserviors；5-ozone
Catalysis oxidation pond；501-ozonator；502-ozone pipeline；6-A/O-MBR membrane bioreactor, 601-aerator；602-
Air line；7-MBR produces pond；8-the first cartridge filter；9-two-stage nitration reverse osmosis units；The reverse osmosis concentrated pond of 10-two-stage nitration；
11-resin pliable cell；12-resin softens clear water reserviors；13-the second cartridge filter；14-NF film unit；Water is produced in 15-nanofiltration
Pond；16-the 3rd cartridge filter；17-high pressure reverse osmosis units；The reverse osmosis concentrated water pot of 18-high pressure；19-the 4th cartridge filter；
20-the first high-pressure flat plate film unit；The dense pond of 21-the first high-pressure flat plate film；22-the first Membrane Materials unit；23-Caustic soda factory saline
System；The dense water pot of 24-nanofiltration；25-mechanical filter；26-filter produces water pot；27-the 5th cartridge filter；28-second is high
Locating back film unit；The dense pond of 29-the second high-pressure flat plate film；30-the second Membrane Materials unit；The dense water pot of 31-Membrane Materials；32-steams
Send out crystallizer；33-produces Water circulation pond；
Letter P represents pump, wherein: P1-pump a；P2-sludge pump；P3-pump b；P4-low-lift pump a；P5-high-pressure pump a；P6-pump
c；P7-low-lift pump b；P8-NF high-pressure pump b；P9-low-lift pump c；P10-high-pressure pump c；P11-low-lift pump d；P12-high-pressure pump d；P13-
Pump d；P14-pump e；P15-low-lift pump e；P16-high-pressure pump e；P17-pump f；P18-pump g.
Detailed description of the invention
Below in conjunction with the accompanying drawings and embodiment, detailed description of the invention of the present utility model is described in further detail.Below
Embodiment is used for illustrating this utility model, but is not limited to scope of the present utility model.
Embodiment 1:
Seeing Fig. 1, the processing system of a kind of chlor-alkali plant strong brine zero-emission, including primary concentration system, secondary concentration system
With three grades of concentration systems；
See dense water regulating reservoir 1 and chemical tendering pond 2, described chemical tendering that Fig. 2, primary concentration system include being sequentially connected with
Pond 2 connects chemical tendering clear water reserviors 4 and device for dehydrating sladge waste 3；Described chemical tendering clear water reserviors 4 connect catalytic ozonation
Pond 5.Catalytic ozonation pond 5 is connected by ozone pipeline 502 ozonator 501.
The outlet pipeline in described catalytic ozonation pond 5 connects A/O-MBR membrane bioreactor 6, and it passes through air line
602 connect aerator 601；The product mouth of a river of A/O-MBR membrane bioreactor 6 connects has MBR to produce pond 7, and MBR produces pond 7 to be passed through
Pipeline and low-lift pump connect the first cartridge filter, then connects two-stage nitration reverse osmosis units 9, described two-stage nitration reverse osmosis through high-pressure pump
The outlet pipeline of unit connects thoroughly product Water circulation pond 33；The reverse osmosis concentrated water lines of two-stage nitration enters the reverse osmosis concentrated pond of two-stage nitration 10,
Subsequently into secondary concentration system (Fig. 3)；
Wherein low pressure pump lift is 40m, and described high pressure pump lift is 160m.Secondary concentration system includes being sequentially connected with
Resin pliable cell 11 and NF film unit 14 (nano-filtration unit), the outlet pipeline of resin pliable cell enters resin and softens clear water
Pond 12, resin softens clear water reserviors 12 has the second cartridge filter 13 by pipeline and low-lift pump P7 connection, then through high-pressure pump P8
Connect nano-filtration unit.
The water producing pipe road of described nano-filtration unit enters nanofiltration and produces pond 15, and being connected by pipeline and low-lift pump P9 has the 3rd guarantor
Peace filter 16, then connect high pressure reverse osmosis units 17 through high-pressure pump P10；The water producing pipe road of described high pressure reverse osmosis units is even
Connecing 33, dense water lines connects the first high-pressure flat plate film unit 20, is provided with high pressure reverse osmosis in the first high-pressure flat plate film unit 20
Film (Tao Shi SW30-4040).
The outlet of the first high-pressure flat plate film unit 20 connects described product Water circulation pond 33, the first high-pressure flat plate by pipeline
The dense water lines of film unit 20 enters the first dense pond of high-pressure flat plate film 21, subsequently into described three grades of concentration systems；
The dense water lines of described nano-filtration unit enters the dense water pot of nanofiltration 24, and being connected by pipeline and low-lift pump P14 has machinery
Filter 25, then connect the 5th cartridge filter 27 through pipeline and low-lift pump P15；5th cartridge filter is through pipeline and height
Press pump P16 connects the second high-pressure flat plate film unit 28, and the outlet of the second high-pressure flat plate film unit is connected to produce water by pipeline
Reuse tank 33；The dense water lines of the second high-pressure flat plate film unit 28 enters the second dense pond of high-pressure flat plate film 29, subsequently into three
Level concentration systems；
Seeing Fig. 4, three grades of concentration systems include the first Membrane Materials unit 22 and the second Membrane Materials unit 30, described first high pressure
The dense water lines of Flat Membrane unit connects the first Membrane Materials unit 22, and the water producing pipe road of the first Membrane Materials unit 22 connects product water and returns
With pond 33；The dense water lines of the second high-pressure flat plate film unit 28 connects the second Membrane Materials unit 30, the product of the second Membrane Materials unit
Water lines connects produces Water circulation pond 33.
Wherein, the dense water lines of the first Membrane Materials unit 22 enters the brine system of Caustic soda factory；
The dense water lines of described second Membrane Materials unit connects crystallizing evaporator 32, and evaporation water lines connects described product water and returns
With pond 33.
Present treatment system also includes sludge treating system (below Fig. 2), connects described Treatment of Sludge bottom chemical tendering pond 2
System；Described sludge treating system includes device for dehydrating sladge waste 3.In the present embodiment, device for dehydrating sladge waste is pressure filter.
Using the system of the present embodiment, for the strong brine of chlor-alkali plant, its index is CODCr200mg/L、BOD 50mg/L、
SS 300mg/L, phosphide 20mg/L, sulfide 30mg/L, TDS 9000.Processing method is as follows:
Primary concentration processes:
Strong brine in dense water regulating reservoir 1 is lifted into chemical tendering pond 2 through pump, and Calx, the dosage of soda are respectively
210mg/L and 350mg/L, then put into the bodied ferric sulfate of 10mg/L and the PAM (polyacrylamide) of 1.5mg/L, remove waste water
In most of hardness, basicity and suspended state material.The mud that chemical tendering pond 2 produces is driven into mud by sludge pump P2 and takes off
Water system 3.
Chemical tendering pond 2 water outlet enters chemical tendering clear water reserviors 4, pumps in catalytic ozonation pond 5 with pump P3 the most again,
Added the ozone of 50mg/L and industrial grade hydrogen peroxide 30mg/L of concentration 10% by ozonator 501, aoxidized by catalysis,
Remove the partial organic substances in water, it is provided that wastewater biodegradability.Catalytic ozonation water outlet enters A/O-MBR film unit 6, enters one
In step degradation water after COD, total nitrogen, and the material such as separating most float, colloid, antibacterial, MBR water outlet enters MBR and produces pond
7.Rise to cartridge filter by low-lift pump P4 the most again, by high-pressure pump P5 enter two-stage nitration reverse osmosis units 9, remove from
Son, float, soluble solid etc., product water enters and produces Water circulation pond 33, and it is reverse osmosis concentrated that two-stage nitration reverse osmosis concentrated water enters two-stage nitration
Pond 10, processes through primary concentration, the TDS in dense water can be concentrated into 30g/l.
Wherein, the materialized mud mixing of chemical tendering pond 2 discharge flows into sludge treating system 3, then defeated by sludge pump P2
Delivering to sludge dewatering system 3, after dehydration, mud cake is delivered to cement production device and is realized harmless treatment as cement producting material.Dirty
The pressing filtering liquid of mud dehydration is back to dense water regulating reservoir 1 with sludge dewatering equipment flushing water and is further processed.
Secondary concentration processes
Water in the reverse osmosis concentrated pond of two-stage nitration 10 is lifted in resin pliable cell 11 (resin employing sequestration by pump P6
Resin), at this, metal cations such as the calcium in two-stage nitration reverse osmosis concentrated water, magnesium are carried out resin softening, water outlet enters resin and softens
Clear water reserviors 12, then be promoted to cartridge filter through nanofiltration (NF) low-lift pump P7 and under the effect of NF high-pressure pump P8, enter NF film
Unit 14.After NF membrane unit 14 processes, strong brine is efficiently separated into two parts: with sodium chloride (NaCl) for main one-tenth
Water is produced in the nanofiltration divided, and with Na2SO4, NaCl be the dense water of nanofiltration of main component, overwhelming majority COD are trapped in dense water, thus
Achieve the preliminary salt separation target of strong brine, here, secondary concentration desalinating process is divided into two branch roads；
Wherein a branch road is: nanofiltration is produced water and entered nanofiltration product pond 15, is promoted to cartridge filter by low-lift pump P9,
Entering high pressure reverse osmosis units 17 by high-pressure pump P10 afterwards, it is achieved concentrate further, product water enters and produces reuse tank 33, dense water
Entering the reverse osmosis concentrated water pot of high pressure 18, the water in the reverse osmosis concentrated water pot of high pressure 18 first passes through low-lift pump P11 and is promoted to security personnel's filtration
Device, then deliver to the first high-pressure flat plate film unit 20, concentration further to concentrated solution by high-pressure pump P12, product water enters and produces water
Reuse tank 33, dense water enters the first dense pond of high-pressure flat plate film 21；
Another branch road is: the dense water of nanofiltration enters the dense water pot of nanofiltration 24, is promoted to mechanical filter 25 (machinery through pump P14
Filter and use quartz filter, filter pressure 0.6MPa), by effects such as the retaining of filtrate, net is caught, adsorb, bridge formations, remove
Most of hydrophobicity suspended material in waste water, the mechanical damage that protection subsequent film system is not caused by impurity.Filter
Produce water to enter filter and produce water pot 26, then be promoted to the 5th cartridge filter through low-lift pump P15, after by high-pressure pump P16 to second
High-pressure flat plate film unit 28, concentration further to concentrated solution, product water enters and produces Water circulation pond 33, and dense water enters the second high-voltage flat
The dense pond of plate film 29, can be concentrated into 100g/l by the TDS in dense water through secondary concentration system.
This secondary concentration processes nanofiltration product Water Sproading rate and reaches 87%.
Three grades of concentration
Dense water in the first dense pond of high-pressure flat plate film 21 is sent by pumping to the first Membrane Materials unit 22, is evaporated dense
Contracting, product water enters and produces Water circulation pond 33, and dense water enters Caustic soda factory brine system 23 to carry out producing reuse, by Membrane Materials system
TDS in dense water can be concentrated into 200g/l.
Water in the second dense pond of high-pressure flat plate film 29 delivers to the second Membrane Materials unit 30 by pump P17, is evaporated dense
Contracting, can be concentrated into about 200g/l by the second Membrane Materials unit 30 by the TDS in dense water, and product water enters and produces Water circulation pond
33, dense water enters the dense water pot of Membrane Materials 31, then delivers to crystallizing evaporator 32 through pump gP18 and carry out last concentrating together, produces water and enters
Producing Water circulation pond 33, the solid salt that crystallization generates then is disposed as the dry salt of solid waste.A whole set of response system only has the height of 1%
Saline enters evaporation and crystallization system, it is achieved that the response rate of system 99%.
Embodiment 2
In the system that the present embodiment uses, Hydranautics SW1-4040 sea water desalination membrane is set in high pressure reverse osmosis units.Dirty
Mud dehydration equipment is folded spiral shell dewaterer.Mechanical filter 25 uses shallow-layer sand to filter, filter pressure 0.3MPa.
The strong brine index of the chlor-alkali plant processed is CODCr150mg/L, BOD 30mg/L, SS100mg/L, phosphide
20mg/L, sulfide 15mg/L, TDS 10000.Processing method is as follows:
Primary concentration processes:
Strong brine in dense water regulating reservoir 1 is lifted into chemical tendering pond 2 through pump, and Calx, the dosage of soda are respectively
220mg/L and 320mg/L, then put into the aluminium polychlorid (PAC) of 12mg/L and the PAM (polyacrylamide) of 1.0mg/L, remove
Most of hardness, basicity and suspended state material in waste water.The mud that chemical tendering pond 2 produces is driven into dirt by sludge pump P2
Mud dewatering system 3.
Chemical tendering pond 2 water outlet enters chemical tendering clear water reserviors 4, pumps in catalytic ozonation pond 5 with pump P3 the most again,
The ozone of 40mg/L and the hydrogen peroxide of industrial grade hydrogen peroxide 30mg/L of 12% is added, by catalysis oxygen by ozonator
Change, remove the partial organic substances in water, it is provided that wastewater biodegradability.Catalytic ozonation water outlet enters A/O-MBR film unit 6,
After the materials such as COD, total nitrogen in degradation water, and separating most float, colloid, antibacterial further, MBR water outlet enters MBR and produces
Pond 7.Rise to cartridge filter by low-lift pump P4 the most again, enter two-stage nitration reverse osmosis units 9 by high-pressure pump P5, remove
Ion, float, soluble solid etc., product water enters and produces Water circulation pond 33, and two-stage nitration reverse osmosis concentrated water enters two-stage nitration reverse osmosis
Dense pond 10, processes through primary concentration, the TDS in dense water can be concentrated into 32g/l.
Wherein, the materialized mud mixing of chemical tendering pond 2 discharge flows into sludge treating system 3, then defeated by sludge pump P2
Delivering to sludge dewatering system 3, after dehydration, mud cake is delivered to cement production device and is realized harmless treatment as cement producting material.Dirty
The pressing filtering liquid of mud dehydration is back to dense water regulating reservoir 1 with sludge dewatering equipment flushing water and is further processed.
Other are arranged and operation is with embodiment 1.
In the present embodiment, secondary concentration processes nanofiltration product Water Sproading rate and reaches 85%.Can be by by the second Membrane Materials unit 30
TDS in dense water is concentrated into 220g/l.A whole set of response system only has the haline water of 2% and enters evaporation and crystallization system, can realize be
The response rate of system 98%.
Above embodiment is only to be described preferred implementation of the present utility model, not to this utility model
Scope be defined, without departing from this utility model design spirit on the premise of, this area ordinary skill technical staff to this
Various modification that the technical scheme of utility model is made and improvement, all should fall into the guarantor that claims of the present utility model determine
In the range of protecting.
Claims (6)
1. the processing system of a chlor-alkali plant strong brine zero-emission, it is characterised in that include primary concentration system, secondary concentration system
System and three grades of concentration systems；
Described primary concentration system includes dense water regulating reservoir and the chemical tendering pond being sequentially connected with, and described chemical tendering pond connects to be had
Chemical tendering clear water reserviors；Described chemical tendering clear water reserviors connect catalytic ozonation pond, going out of described catalytic ozonation pond
Water lines connects A/O-MBR membrane bioreactor, and the product mouth of a river of A/O-MBR membrane bioreactor connects two-stage nitration reverse osmosis list
Unit, the outlet pipeline of described two-stage nitration reverse osmosis units connects product Water circulation pond；It is anti-that the reverse osmosis concentrated water lines of two-stage nitration enters two-stage nitration
Permeate dense pond, subsequently into secondary concentration system；
Described secondary concentration system includes resin pliable cell and the nano-filtration unit being sequentially connected with, the water producing pipe of described nano-filtration unit
Road is sequentially connected with high pressure reverse osmosis units, the first high-pressure flat plate film unit, and the outlet of described first high-pressure flat plate film unit leads to
Crossing pipeline and connect described product Water circulation pond, the dense water lines of the first high-pressure flat plate film unit enters the first dense water of high-pressure flat plate film
Pond, subsequently into described three grades of concentration systems；The dense water lines of described nano-filtration unit is sequentially connected with filter and the second high-voltage flat
Plate film unit, the outlet of described second high-pressure flat plate film unit connects described product Water circulation pond by pipeline；Second high-voltage flat
The dense water lines of plate film unit enters the second dense pond of high-pressure flat plate film, subsequently into described three grades of concentration systems；
Described three grades of concentration systems include the first Membrane Materials unit and the second Membrane Materials unit, described first high-pressure flat plate film unit
Dense water lines connect the first Membrane Materials unit, the water producing pipe road of described first Membrane Materials unit connects described product Water circulation pond；
The dense water lines of described second high-pressure flat plate film unit connects the second Membrane Materials unit, described second Membrane Materials unit water producing pipe road
Connect described product Water circulation pond.
Processing system the most according to claim 1, it is characterised in that in described primary concentration system, A/O-MBR film is biological
The product mouth of a river of reactor connects has MBR to produce pond, and MBR produces pond has the first cartridge filter by pipeline and low-lift pump connection,
Connecting described two-stage nitration reverse osmosis units through high-pressure pump again, described low pressure pump lift is 10～100m, raising of described high-pressure pump
Journey is 100～1600m.
Processing system the most according to claim 1, it is characterised in that in described secondary concentration system, resin pliable cell
Outlet pipeline enter resin and soften clear water reserviors, resin is softened clear water reserviors and is connected by pipeline and low-lift pump and have the second security personnel to filter
Device, then connect described nano-filtration unit through high-pressure pump.
4. according to the arbitrary described processing system of claims 1 to 3, it is characterised in that in described secondary concentration system, described in receive
The water producing pipe road of filter unit enters nanofiltration and produces pond, and being connected by pipeline and low-lift pump has the 3rd cartridge filter, then through too high
Press pump connects described high pressure reverse osmosis units；
The water producing pipe road of described high pressure reverse osmosis units connects described product Water circulation pond, and dense water lines connects described first high-voltage flat
Plate film unit, is provided with bitter film or sea water desalination membrane in described high pressure reverse osmosis units；
The dense water lines of described nano-filtration unit enters the dense water pot of nanofiltration, and being connected by pipeline and low-lift pump has mechanical filter, then
The 5th cartridge filter is connected through pipeline and low-lift pump；5th cartridge filter connects the second high pressure through pipeline and high-pressure pump
Flat Membrane unit；
Described low pressure pump lift is 10～100m, and described high pressure pump lift is 100～1600m.
5. according to the arbitrary described processing system of claims 1 to 3, it is characterised in that in described three grades of concentration systems, described the
The dense water lines of one Membrane Materials unit enters the brine system of Caustic soda factory；The dense water lines of described second Membrane Materials unit connects steams
Sending out crystallizer, evaporation water lines connects described product Water circulation pond.
6. according to the arbitrary described processing system of claims 1 to 3, it is characterised in that described processing system also includes at mud
Reason system, connects described sludge treating system bottom described chemical tendering pond；Described sludge treating system includes that sludge dewatering sets
Standby.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105906149A (en) * | 2016-06-02 | 2016-08-31 | 内蒙古君正氯碱化工技术研究院 | Chlor-alkali plant strong brine zero-discharge treatment system and treatment method |
| CN110171893A (en) * | 2019-06-26 | 2019-08-27 | 西安热工研究院有限公司 | A kind of full factory waste water zero discharge system and method for water resource of reclaimed water plant gas |
| CN113200588A (en) * | 2020-03-13 | 2021-08-03 | 大唐环境产业集团股份有限公司 | Preparation device and preparation method of composite flocculant |
-
2016
- 2016-06-02 CN CN201620536571.1U patent/CN205687743U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105906149A (en) * | 2016-06-02 | 2016-08-31 | 内蒙古君正氯碱化工技术研究院 | Chlor-alkali plant strong brine zero-discharge treatment system and treatment method |
| CN105906149B (en) * | 2016-06-02 | 2018-07-31 | 内蒙古君正氯碱化工技术研究院 | A kind of processing system and processing method of the zero-emission of chlor-alkali plant strong brine |
| CN110171893A (en) * | 2019-06-26 | 2019-08-27 | 西安热工研究院有限公司 | A kind of full factory waste water zero discharge system and method for water resource of reclaimed water plant gas |
| CN113200588A (en) * | 2020-03-13 | 2021-08-03 | 大唐环境产业集团股份有限公司 | Preparation device and preparation method of composite flocculant |
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