CN110066060A - A kind of white carbon black industrial wastewater processing system and treatment process - Google Patents
A kind of white carbon black industrial wastewater processing system and treatment process Download PDFInfo
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- CN110066060A CN110066060A CN201910312775.5A CN201910312775A CN110066060A CN 110066060 A CN110066060 A CN 110066060A CN 201910312775 A CN201910312775 A CN 201910312775A CN 110066060 A CN110066060 A CN 110066060A
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01D—COMPOUNDS OF ALKALI METALS, i.e. LITHIUM, SODIUM, POTASSIUM, RUBIDIUM, CAESIUM, OR FRANCIUM
- C01D5/00—Sulfates or sulfites of sodium, potassium or alkali metals in general
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01D—COMPOUNDS OF ALKALI METALS, i.e. LITHIUM, SODIUM, POTASSIUM, RUBIDIUM, CAESIUM, OR FRANCIUM
- C01D5/00—Sulfates or sulfites of sodium, potassium or alkali metals in general
- C01D5/16—Purification
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
- C02F1/441—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by reverse osmosis
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
- C02F1/442—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by nanofiltration
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
- C02F1/444—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by ultrafiltration or microfiltration
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
- C02F1/448—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by pervaporation
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/101—Sulfur compounds
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2301/00—General aspects of water treatment
- C02F2301/08—Multistage treatments, e.g. repetition of the same process step under different conditions
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Abstract
The invention discloses a kind of white carbon black industrial wastewater processing systems, including preprocessing system, sludge drying device, TMF system, two sections of nanofiltration systems, counter-infiltration system, dilution crystallization system, dissolved agent recovery system and advanced oxidation system.White carbon black industrial wastewater processing system of the invention couples dilution crystallization technique using membrane technology as core, and " zero-emission " processing investment and operating cost of white carbon black industrial wastewater are reduced with this.The invention also discloses a kind of White carbon black production wastewater treatment technology, investment and operating cost are reduced.
Description
Technical field
The present invention relates to technical field of waste water processing more particularly to a kind of white carbon black industrial wastewater processing systems and processing work
Skill.
Background technique
White carbon black is the general name of white powder X-ray amorphous silicic acid and silicate product, is primarily referred to as precipitating dioxy
SiClx, fumed silica and superfine silicon dioxide gel also include powdered synthetic aluminium silicate and calcium silicates etc..White carbon black is
Porous material, composition can use SiO2·nH2O indicates, wherein nH2O is existed in the form of surface hydroxyl.By production method
It is broadly divided into precipitated silica and fume colloidal silica.It is cotton-shaped translucent solid for white-amorphous under fume colloidal silica normality
Body glue nanoparticle (partial size is less than 100nm), it is nontoxic, there is huge specific surface area.Fume colloidal silica is entirely nanometer two
Silica, for product purity up to 99%, partial size is up to 10~20nm, but preparation process is complicated, expensive；Precipitated silica
It is divided into traditional precipitated silica and special precipitation white carbon black again, the former refers to sulfuric acid, hydrochloric acid, CO2It is base with waterglass
The silica of this raw material production, the latter refer to using high-gravity technology, sol-gel method, chemical crystal method, second-crystallized method
Or the silica of the specific process such as reverse micelle microemulsion liquid method production.Precipitated silica is mainly used as natural rubber and synthesis rubber
Reinforcing agent, toothpaste abrasives of glue etc..Gas-phase silica is mainly used as reinforcing agent, coating and the unsaturated-resin thickening of silicon rubber
Agent, superfine silicon dioxide gel and aeroge are mainly used as Coating Matting agent, thickener, plastic film open agent etc..
White carbon black is mainly used for rubber product (including high-temperature vulcanized silicon rubber as a kind of environmental protection, the auxiliary agent that has excellent performance
Glue), weaving, papermaking, pesticide, food additives field.From the point of view of the speedup of this four annual output of white carbon black 2014-2018, four
Annual compound growth rate 11.3%.It is more than 80 that China in 2019, which shares white carbon black production enterprise, and about 1,200,000 tons of production capacity, yield 80
Ten thousand tons, Chinese volume of production and marketing ranks the first in the world.Have benefited from the fields such as Tire production industry, silicon rubber industry, coatings industry, new energy
Demand growth, it is contemplated that the average annual demand growth speed of following China's precipitated silica (silica) is about 12%.China accounts for
The 40% of Asian market will become the maximum single market in the whole world.
The main raw material(s) of producing white carbon black using settling method is quartz sand, soda ash, technical hydrochloric acid or sulfuric acid or nitric acid or dioxy
Change carbon.Its process route is generally: first at high temperature reacting quartz sand with soda ash using fuel oil or fat coal and industry is made
Waterglass, industrial waterglass are configured to certain density weak solution with water, certain acid is then added under certain condition, makes dioxy
SiClx is precipitated out, then cleaned, filtering, dry (drying or spraying), crush, product white carbon black is made.Thus known to technique:
Producing white carbon black using settling method is essentially all inorganic reaction process, due to using alkali and acid in process of production, waste water it is main
Ingredient also in that neutralize and attached salt, main salt are Na2SO4, other mainly to contain K+、Na+、Mg2+、Na2S plasma
Inorganic salts and solid insoluble, suspended matter.Substantially the not participation of organic matter in production process, the COD value of waste water is lower, no
It is the emphasis of processing.
It, can be more using multiple-effect evaporation technology, mechanical forced Compression Evaporation crystallization technique etc. for white carbon black waste water characteristic
Kind treatment process realizes being effectively treated for white carbon black waste water, is finally reached " zero-emission " processing intent, further recycles at waste water
The heat of needs during reason reduces waste water integrated operation cost, but such treatment process has cost of investment height, operation
The problems such as costly.
Summary of the invention
For overcome the deficiencies in the prior art, the purpose of the present invention is to provide a kind of white carbon black industrial wastewater processing systems
System, using membrane technology as core, while being coupled dilution crystallization technique, is reduced at " zero-emission " of white carbon black industrial wastewater with this
Reason investment and operating cost.
The second object of the present invention is to provide a kind of White carbon black production wastewater treatment technology, investment and operating cost drop
It is low.
An object of the present invention adopts the following technical scheme that realization:
A kind of white carbon black industrial wastewater processing system, including preprocessing system, sludge drying device, TMF system, two sections receive
Filter system, counter-infiltration system, dilution crystallization system, dissolved agent recovery system and advanced oxidation system；
The preprocessing system includes neutralization pond and concentration basin；
The TMF system includes that TMF processing pond and TMF produce pond；
Two sections of nanofiltration systems include one section of nanofiltration system and two sections of nanofiltration systems；
The dilution crystallization system includes dilution crystallization reaction kettle and centrifugal drying system；
The dissolved agent recovery system includes crystalline mother solution pond, heat temperature raising system and infiltration evaporation device；
The neutralization pond is provided with white carbon black production mother liquor import；The neutralization pond, concentration basin, TMF processing pond, TMF are produced
Pond, one section of nanofiltration system, two sections of nanofiltration systems, dilution crystallization reaction kettle and centrifugal drying system are sequentially connected；
The concentration basin is connect with the sludge drying device；
One section of nanofiltration system and two sections of nanofiltration systems are connect with the counter-infiltration system；
The dilution crystallization reaction kettle and the centrifugal drying system are connect with the crystalline mother solution pond, the knot
Brilliant mother liquor pond, heat temperature raising system and infiltration evaporation device are sequentially connected；
The infiltration evaporation device, the advanced oxidation system and the neutralization pond are sequentially connected.
Further, the TMF processing pond is back to the concentration basin；The counter-infiltration system is back to the TMF and produces
Pond.
Further, mechanical stirring system and aerator are provided in the neutralization pond.
Further, the concentration bottom of pond portion is pyramidal structure, and the concentration bottom of pond portion is connected with pneumatic diaphragm pump.
Further, the sludge drying device includes plate compression equipment, vacuum belt machine and dish-style Principle of Screw Pressure Filter.
Further, one section of nanofiltration system is provided with the rolling nanofiltration membrane of pressure-resistant 4MPa or more；Two sections of nanofiltrations
System is provided with the rolling nanofiltration membrane or dish tubular nanofiltration membrane of pressure-resistant 8MPa or more.
Further, mechanical stirring device is provided in the dilution crystallization reaction kettle.
Further, hollow fiber form component is provided in the infiltration evaporation device, in the hollow fiber form component
Filled with membrane material.
Further, the membrane material is hydrophobic material.
Further, the advanced oxidation system is provided with device for catalyzing and oxidating ozone, electrocatalysis oxidation apparatus or high temperature
Catalytic wet oxidation device.
The second object of the present invention adopts the following technical scheme that realization:
A kind of White carbon black production wastewater treatment technology, using the white carbon black industrial wastewater processing system, including it is following
Step:
Pre-treatment step: white carbon black production mother liquor is discharged into the neutralization pond, enters the concentration basin after adjusting pH；
TMF systematic processing steps: waste water is discharged into the TMF processing pond in the concentration basin, passes through the mistake of tube microfiltration membrane
It filters off except the suspended particulate substance in waste water, the suspended particulate substance being removed is back to the concentration basin；
Sludge drying step: concentration of suspension passes through the sludge drying device after reaching predetermined concentration in the concentration basin
It is handled, is transported outward after processing；
Nano-filtration step: the waste water that the TMF produces pond is successively discharged into one section of nanofiltration system and two sections of nanofiltration systems
System carries out concentration；
Reverse osmosis step: the water being discharged from two sections of nanofiltration systems carries out purified treatment by the counter-infiltration system,
Reach recycle water standard and obtains reuse；
Dilution crystallization step: the nanofiltration concentrate being discharged from two sections of nanofiltration systems enters the dilution crystallization reaction kettle
In, dissolved agent is put into the dilution crystallization reaction kettle, stirring is stood, Na2SO4It is precipitated, the Na of precipitation2SO4By it is described from
After the processing of heart dehydration drying system, anhydrous sodium sulphate product is obtained；
Dissolved agent recycling step: dilution crystallization mother liquor and centrifugate enter the crystalline mother solution pond, the crystalline mother solution pond
Interior waste liquid successively carries out aqueous solution and dissolved agent separation by the heat temperature raising system and the infiltration evaporation device, recycles molten
Analyse agent；
Reflux oxidation step: remaining seepage remaining liquid enters the advanced oxidation system after recycling dissolved agent, removes the infiltration
The neutralization pond is back to after remaining dissolved agent in extraction raffinate.
Further, in the pre-treatment step, the pH of white carbon black production mother liquor is adjusted to neutrality by adding NaOH.
Further, in the reverse osmosis step, the concentrate of the counter-infiltration system is back to the TMF and produces water
Pond.
Further, in the sludge drying step, the moisture percentage in sewage sludge being discharged from the sludge drying device is 30-
40%.
Further, in the dilution crystallization step, it is provided with mechanical stirring device in the dilution crystallization reaction kettle,
The revolving speed that the mechanical stirring device is arranged is 1000-1500r/min.
Further, it in the dilution crystallization step, after putting into dissolved agent into the dilution crystallization reaction kettle, opens
Mechanical stirring device stands 50-60min after stirring 5-15min；The weight ratio of dissolved agent and nanofiltration concentrate is (1-1.2): 1.
Further, in the dilution crystallization step, the dissolved agent is ethyl alcohol, propyl alcohol or butanol.
Further, in the dissolved agent recycling step, the heating temperature of the heat temperature raising system is 60-70 DEG C.
Further, in the dissolved agent recycling step, the vacuum degree of setting infiltrating and vaporizing membrane per-meate side is 5-
10mmHg。
Further, in the dissolved agent recycling step, the dissolved agent moisture content of recycling is 0.1% hereinafter, seepage remaining liquid
Middle dissolved agent residual quantity is less than 1%.
Compared with prior art, the beneficial effects of the present invention are:
White carbon black industrial wastewater processing system and treatment process provided by the present invention, have the advantage that
1) present invention passes through "+two sections of nanofiltration system+counter-infiltration systems of neutralization+TMF system+dilution crystallization system+infiltration vapour
Change system " group technology, can in reuse white carbon black industrial wastewater 80% or more moisture, while again can be in resource utilization waste water
Na2SO4, produce anhydrous sodium sulphate product.
2) conventional processes are compared, steam can be reduced using group technology processing white carbon black industrial wastewater of the invention and consumed
Amount and power consumption, are further reduced processing cost, and improve the stability of integrated artistic route operation.
3) TMF system through the invention can improve the concentrated effect of the suspended matters such as silica in waste water, without precipitating
Pond reduces system footprint area, stable effluent quality.
4) two sections of nanofiltration technique dialogue carbon black waste waters through the invention are concentrated, and can improve terminal waste water Na2SO4It is dense
Degree, with reverse osmosis concentration contrast operation's pressure reduction, operating cost decreases.
5) reverse osmosis purification system through the invention can improve quality of reused water situation, guarantee the stabilization of producing water water quality
Property.
6) dilution crystallization through the invention handles nanofiltration system, and concentrate had not both needed the evaporation process system of high energy consumption
System, and produced Na can be improved2SO4Crystallization purity.
7) infiltration evaporation device through the invention handles dilution crystallization mother liquor, can effectively recycle dissolved agent, reduces dissolved
The treatment agent cost of crystallization treatment technique improves integrated artistic economy.
8) economic benefit and social benefit are had both using process white carbon black industrial wastewater provided by the invention, and had
Research and extension value.
Detailed description of the invention
Fig. 1 is the flow chart of white carbon black industrial wastewater processing system provided by the embodiment of the present invention.
Specific embodiment
In the following, being described further in conjunction with attached drawing and specific embodiment to the present invention, it should be noted that not
Under the premise of conflicting, new implementation can be formed between various embodiments described below or between each technical characteristic in any combination
Example.
Embodiment 1
A kind of white carbon black industrial wastewater processing system, including preprocessing system, sludge drying device, TMF system, two sections receive
Filter system, counter-infiltration system, dilution crystallization system, dissolved agent recovery system and advanced oxidation system；
Preprocessing system includes neutralization pond and concentration basin；
TMF system includes that TMF processing pond and TMF produce pond；
Two sections of nanofiltration systems include one section of nanofiltration system and two sections of nanofiltration systems；
Dilution crystallization system includes dilution crystallization reaction kettle and centrifugal drying system；
Dissolved agent recovery system includes crystalline mother solution pond, heat temperature raising system and infiltration evaporation device；
Neutralization pond is provided with white carbon black production mother liquor import；Neutralization pond, concentration basin, TMF processing pond, TMF produce pond, one section
Nanofiltration system, two sections of nanofiltration systems, dilution crystallization reaction kettle and centrifugal drying system are sequentially connected；
Concentration basin is connect with sludge drying device；
One section of nanofiltration system and two sections of nanofiltration systems are connect with counter-infiltration system；
Dilution crystallization reaction kettle and centrifugal drying system are connect with crystalline mother solution pond, and crystalline mother solution pond, heating rise
Warm system and infiltration evaporation device are sequentially connected；
Infiltration evaporation device, advanced oxidation system and neutralization pond are sequentially connected.
As further embodiment, TMF processing pond is back to concentration basin；Counter-infiltration system is back to TMF and produces pond.
As further embodiment, mechanical stirring system and aerator are provided in neutralization pond.
As further embodiment, concentration bottom of pond portion is pyramidal structure, and concentration bottom of pond portion is connected with pneumatic diaphragm pump,
Pneumatic diaphragm pump is for discharging the waste liquid containing high concentration suspended matter to sludge concentration tank.
As further embodiment, it is provided with water outlet in the middle part of concentration basin side wall, for supplying water to TMF processing pond.
As further embodiment, sludge drying device includes plate compression equipment, vacuum belt machine and dish-style spiral shell
Spinning filter, is certainly not limited to above equipment.
As further embodiment, one section of nanofiltration system is provided with the rolling nanofiltration that the resistant of pressure-resistant 4MPa or more is blocked up
Film；Two sections of nanofiltration systems are provided with the rolling nanofiltration membrane or dish tubular nanofiltration membrane of pressure-resistant 8MPa or more, also can choose other conjunctions
Suitable high pressure nanofiltration membrane.
As further embodiment, mechanical stirring device is provided in dilution crystallization reaction kettle.
As further embodiment, hollow fiber form component is provided in infiltration evaporation device, to improve in component
The filling area of membrane material, hollow fiber form component is interior to be filled with membrane material, and membrane material is preferably hydrophobic material.
As further embodiment, advanced oxidation system is provided with device for catalyzing and oxidating ozone, electrocatalytic oxidation makeup
It sets or high temperature catalytic wet oxidation device, advanced oxidation system is advisable with no dosing mode of oxidizing.
Embodiment 2
A kind of White carbon black production wastewater treatment technology, the white carbon black industrial wastewater processing system of use, comprising the following steps:
Pre-treatment step: white carbon black production mother liquor is discharged into neutralization pond, enters concentration basin after adjusting pH；
TMF systematic processing steps: waste water is discharged into TMF processing pond in concentration basin, is removed by the filtering of tube microfiltration membrane useless
A large amount of suspended particulate substance in water, the suspended particulate substance being removed are back to concentration basin；
Sludge drying step: with the not stopping pregnancy water of tube microfiltration membrane, concentration of suspension is continuously improved in concentration basin, concentration
Concentration of suspension is handled after reaching predetermined concentration by sludge drying device in pond, is transported outward after processing；
Nano-filtration step: the waste water that TMF produces pond is successively discharged into one section of nanofiltration system and two sections of nanofiltration systems carry out high magnification
Concentration, the Na in waste water2SO4Concentration reaches 14% or more after the concentration of two-stage nanofiltration membrane；
Reverse osmosis step: the water being discharged from two sections of nanofiltration systems carries out purified treatment by counter-infiltration system, reaches reuse
Water quality standard obtains reuse；
Dilution crystallization step: the nanofiltration concentrate being discharged from two sections of nanofiltration systems enters in dilution crystallization reaction kettle, past molten
It analyses and puts into dissolved agent in crystallization reactor, open mechanical stirring device, mix well dissolved agent with nanofiltration concentrate, stirring one
It is stood after fixing time, Na2SO4It is precipitated, the Na of precipitation2SO4After handling by centrifugal drying system, anhydrous sodium sulphate product is obtained,
Acquisition economic benefit is sold outside anhydrous sodium sulphate product；
Dissolved agent recycling step: dilution crystallization mother liquor and centrifugate enter crystalline mother solution pond, in crystalline mother solution pond waste liquid according to
It is secondary to carry out efficiently separating for aqueous solution and dissolved agent by heat temperature raising system and infiltration evaporation device, to recycle most
Dissolved agent；
Reflux oxidation step: remaining seepage remaining liquid enters advanced oxidation system after recycling dissolved agent, removes residual in seepage remaining liquid
It is back to neutralization pond after the dissolved agent stayed, dissolved agent is prevented to be enriched in system.
As further embodiment, in pre-treatment step, white carbon black production mother liquor is adjusted by adding NaOH
PH is to neutrality.Neutralization pond is used to be mixed well the waste water such as white carbon black industrial wastewater and the water outlet of advanced oxidation system, adjust
Water quality makes it keep water stabilization over a period to come, and adjusts pH to neutrality, to guarantee " zero-emission " by adding NaOH
The stable operation of processing system.
As further embodiment, in TMF systematic processing steps, TMF processing pond carries out waste water in concentration basin
Filtration treatment, SiO2It is back to concentration basin with TMF concentrate after waiting suspended matters to be retained by membrane tube, permeate flow to TMF and produces pond.
As further embodiment, in reverse osmosis step, the production water of two sections of nanofiltration systems enters reverse osmosis system
System carries out purified treatment, and to guarantee the stability of quality of reused water, counter-infiltration system concentrate is back to TMF and produces pond.
As further embodiment, in sludge drying step, from the moisture percentage in sewage sludge of sludge drying device discharge
For 30-40%.
As further embodiment, in dilution crystallization step, mechanical stirring is provided in dilution crystallization reaction kettle
Device, the revolving speed that mechanical stirring device is arranged is 1000-1500r/min.
As further embodiment, in dilution crystallization step, after putting into dissolved agent into dilution crystallization reaction kettle,
Mechanical stirring device is opened, stands 50-60min after stirring 5-15min；The weight ratio of dissolved agent and nanofiltration concentrate is (1-
1.2):1。
As further embodiment, in dilution crystallization step, dissolved agent be ethyl alcohol, propyl alcohol or butanol, most preferably
It is ethyl alcohol.
As further embodiment, in dissolved agent recycling step, dilution crystallization mother liquor and centrifugate enter crystallization
Mother liquor pond, is heated by heat temperature raising system, and the heating temperature that heat temperature raising system is arranged is 60-70 DEG C, is heated laggard
Enter to permeate vapourizing unit.
As further embodiment, in dissolved agent recycling step, the vacuum degree of infiltrating and vaporizing membrane per-meate side is set
For 5-10mmHg.
As further embodiment, in dissolved agent recycling step, the dissolved agent moisture content of recycling 0.1% with
Under, dissolved agent residual quantity is less than 1% in seepage remaining liquid.
Effect assessment and performance detection
1, after white carbon black production mother liquor is neutralized, TMF of the invention (tube microfiltration membrane) technique mistake is respectively adopted
Filter purification and traditional flocculation sedimentation processing, experimental result are as shown in table 1 below.
The TMF technique of the present invention of table 1 and traditional flocculation sedimentation treatment process logging table
2, the embodiment of the present invention combines " two sections of nanofiltration membrane system+counter-infiltration systems ", can obtain conductivity < 30us/
The pure water of cm, and Na can be obtained2SO4The strong brine of concentration >=15%, related experiment operate operating parameter and testing result such as following table
Shown in 2.
The result record sheet of table 2 progress nanofiltration and reverse osmosis Combined Trials
3, the experiment of dilution crystallization
The Na for being 15% (w/w) by 50L concentration2SO4Nanofiltration concentrate is divided into 20 parts, and every part of 2.5L pours into 10L's respectively
In PE barrels, according to different dissolved agent and nanofiltration concentrate (dissolved liquid water ratio) weight ratio (0: 1,0.5: 1,1: 1,1.2: 1,
1.5: 1) being separately added into dissolved liquid (ethyl alcohol, propyl alcohol, n-butanol, isobutanol), analyse heavy separation, calculate Na2SO4The rate of recovery (%),
As a result as shown in table 3 below.
3 Na of table2SO4Rate of recovery result record sheet
It can be obtained from table 3, when the weight ratio of dissolved agent and nanofiltration concentrate is (1-1.5): when 1, Na2SO4Can obtain compared with
The high rate of recovery, but when the weight ratio of dissolved agent and nanofiltration concentrate is increased to 1.5:1 by 1.2:1, the growth width of the rate of recovery
Less, therefore, the optimum weight ratio of dissolved agent and nanofiltration concentrate is (1-1.2) to degree: 1.Also, it is concentrated in dissolved agent and nanofiltration
In the identical situation of the weight ratio of liquid, when using ethyl alcohol as dissolved agent, Na2SO4Rate of recovery highest, therefore, ethyl alcohol is most preferred
Dissolved agent.
4, the experiment of infiltration evaporation
Crystalline mother solution after dilution crystallization is divided into 16 parts, carries out infiltration evaporation experiment, respectively to test ethyl alcohol dissolved agent
The rate of recovery (%).Embodiment is that 16 parts of water samples are divided into 4 groups respectively, and each group is separately heated to 50 DEG C, 60 DEG C, 70 DEG C, 80
DEG C, it organizes interior each water sample and per-meate side vacuum degree is evacuated to 3mmHg, 6mmHg, 9mmHg, 12mmHg respectively during the test, obtain
Ethanol recovery (%), as shown in table 4 below.
The rate of recovery result record sheet of 4 dissolved agent (ethyl alcohol) of table
It can be obtained from table 4, when temperature is identical, the rate of recovery of ethyl alcohol is promoted with the raising of vacuum degree；When vacuum degree phase
Meanwhile the rate of recovery of ethyl alcohol is promoted as the temperature rises.But temperature increases, vacuum degree raising will lead to energy consumption increase,
From the point of view of the rate of recovery, after 70 DEG C and 9mmHg, rate of recovery promotion eases up, so from economic considerations, heat temperature raising system
Heating temperature is set as 60-70 DEG C, and the vacuum degree of infiltrating and vaporizing membrane per-meate side is to be set as more economical reasonable between 5-10mmHg.
The above embodiment is only the preferred embodiment of the present invention, and the scope of protection of the present invention is not limited thereto,
The variation and replacement for any unsubstantiality that those skilled in the art is done on the basis of the present invention belong to institute of the present invention
Claimed range.
Claims (20)
1. a kind of white carbon black industrial wastewater processing system, which is characterized in that including preprocessing system, sludge drying device, TMF system
System, two sections of nanofiltration systems, counter-infiltration system, dilution crystallization system, dissolved agent recovery system and advanced oxidation system；
The preprocessing system includes neutralization pond and concentration basin；
The TMF system includes that TMF processing pond and TMF produce pond；
Two sections of nanofiltration systems include one section of nanofiltration system and two sections of nanofiltration systems；
The dilution crystallization system includes dilution crystallization reaction kettle and centrifugal drying system；
The dissolved agent recovery system includes crystalline mother solution pond, heat temperature raising system and infiltration evaporation device；
The neutralization pond is provided with white carbon black production mother liquor import；The neutralization pond, concentration basin, TMF processing pond, TMF produce pond,
One section of nanofiltration system, two sections of nanofiltration systems, dilution crystallization reaction kettle and centrifugal drying system are sequentially connected；
The concentration basin is connect with the sludge drying device；
One section of nanofiltration system and two sections of nanofiltration systems are connect with the counter-infiltration system；
The dilution crystallization reaction kettle and the centrifugal drying system are connect with the crystalline mother solution pond, and the crystallization is female
Liquid pool, heat temperature raising system and infiltration evaporation device are sequentially connected；
The infiltration evaporation device, the advanced oxidation system and the neutralization pond are sequentially connected.
2. white carbon black industrial wastewater processing system as described in claim 1, which is characterized in that the TMF processing pond is back to
The concentration basin；The counter-infiltration system is back to the TMF and produces pond.
3. white carbon black industrial wastewater processing system as described in claim 1, which is characterized in that setting is organic in the neutralization pond
Tool stirring system and aerator.
4. white carbon black industrial wastewater processing system as described in claim 1, which is characterized in that the concentration bottom of pond portion is taper
Structure, the concentration bottom of pond portion are connected with pneumatic diaphragm pump.
5. white carbon black industrial wastewater processing system as described in claim 1, which is characterized in that the sludge drying device includes
Plate compression equipment, vacuum belt machine and dish-style Principle of Screw Pressure Filter.
6. white carbon black industrial wastewater processing system as described in claim 1, which is characterized in that one section of nanofiltration system setting
There is the rolling nanofiltration membrane of pressure-resistant 4MPa or more；Two sections of nanofiltration systems are provided with the rolling nanofiltration membrane or dish of pressure-resistant 8MPa or more
Tubular nanofiltration membrane.
7. white carbon black industrial wastewater processing system as described in claim 1, which is characterized in that in the dilution crystallization reaction kettle
It is provided with mechanical stirring device.
8. white carbon black industrial wastewater processing system as described in claim 1, which is characterized in that set in the infiltration evaporation device
It is equipped with hollow fiber form component, is filled with membrane material in the hollow fiber form component.
9. white carbon black industrial wastewater processing system as claimed in claim 8, which is characterized in that the membrane material is hydrophobic material
Material.
10. white carbon black industrial wastewater processing system as described in claim 1, which is characterized in that the advanced oxidation system is set
It is equipped with device for catalyzing and oxidating ozone, electrocatalysis oxidation apparatus or catalytic wet oxidation device.
11. a kind of White carbon black production wastewater treatment technology, which is characterized in that use white carbon black production as described in claim 1
Waste water treatment system, comprising the following steps:
Pre-treatment step: white carbon black production mother liquor is discharged into the neutralization pond, enters the concentration basin after adjusting pH；
TMF systematic processing steps: waste water is discharged into the TMF processing pond in the concentration basin, passes through filtering off for tube microfiltration membrane
Except the suspended particulate substance in waste water, the suspended particulate substance being removed is back to the concentration basin；
Sludge drying step: concentration of suspension is carried out after reaching predetermined concentration by the sludge drying device in the concentration basin
Processing, is transported outward after processing；
Nano-filtration step: the waste water that the TMF produces pond be successively discharged into one section of nanofiltration system and two sections of nanofiltration systems into
Row concentration；
Reverse osmosis step: the water being discharged from two sections of nanofiltration systems carries out purified treatment by the counter-infiltration system, reaches
Recycle water standard obtains reuse；
Dilution crystallization step: the nanofiltration concentrate being discharged from two sections of nanofiltration systems enters in the dilution crystallization reaction kettle,
Dissolved agent is put into the dilution crystallization reaction kettle, stirring is stood, Na2SO4It is precipitated, the Na of precipitation2SO4Pass through the centrifugation
After dehydration drying system processing, anhydrous sodium sulphate product is obtained；
Dissolved agent recycling step: dilution crystallization mother liquor and centrifugate enter the crystalline mother solution pond, then successively add by described
Hot temperature elevation system and the infiltration evaporation device carry out aqueous solution and dissolved agent separation, recycle dissolved agent；
Reflux oxidation step: remaining seepage remaining liquid enters the advanced oxidation system after recycling dissolved agent, removes the seepage remaining liquid
In be back to the neutralization pond after remaining dissolved agent.
12. White carbon black production wastewater treatment technology as claimed in claim 11, which is characterized in that in the pre-treatment step
In, the pH of white carbon black production mother liquor is adjusted to neutrality by adding NaOH.
13. White carbon black production wastewater treatment technology as claimed in claim 11, which is characterized in that in the reverse osmosis step
In, the concentrate of the counter-infiltration system is back to the TMF and produces pond.
14. White carbon black production wastewater treatment technology as claimed in claim 11, which is characterized in that in the sludge drying step
In, the moisture percentage in sewage sludge being discharged from the sludge drying device is 30-40%.
15. White carbon black production wastewater treatment technology as claimed in claim 11, which is characterized in that in the dilution crystallization step
In, it is provided with mechanical stirring device in the dilution crystallization reaction kettle, the revolving speed that the mechanical stirring device is arranged is 1000-
1500r/min。
16. White carbon black production wastewater treatment technology as claimed in claim 15, which is characterized in that in the dilution crystallization step
In, after putting into dissolved agent into the dilution crystallization reaction kettle, mechanical stirring device is opened, stands 50- after stirring 5-15min
60min；The weight ratio of dissolved agent and nanofiltration concentrate is (1-1.2): 1.
17. White carbon black production wastewater treatment technology as claimed in claim 11, which is characterized in that in the dilution crystallization step
In, the dissolved agent is ethyl alcohol, propyl alcohol or butanol.
18. White carbon black production wastewater treatment technology as claimed in claim 11, which is characterized in that recycle and walk in the dissolved agent
In rapid, the heating temperature of the heat temperature raising system is 60-70 DEG C.
19. White carbon black production wastewater treatment technology as claimed in claim 11, which is characterized in that recycle and walk in the dissolved agent
In rapid, the vacuum degree of setting infiltrating and vaporizing membrane per-meate side is 5-10mmHg.
20. White carbon black production wastewater treatment technology as claimed in claim 11, which is characterized in that recycle and walk in the dissolved agent
In rapid, the dissolved agent moisture content of recycling is 0.1% hereinafter, dissolved agent residual quantity is less than 1% in seepage remaining liquid.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110526474A (en) * | 2019-09-18 | 2019-12-03 | 上一环保科技（杭州）有限公司 | A kind of the concentrate decrement method and concentrate reducing device of reverse osmosis concentrated water |
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2019
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110526474A (en) * | 2019-09-18 | 2019-12-03 | 上一环保科技（杭州）有限公司 | A kind of the concentrate decrement method and concentrate reducing device of reverse osmosis concentrated water |
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