CN204474480U - A kind for the treatment of system of high slat-containing wastewater - Google Patents

A kind for the treatment of system of high slat-containing wastewater Download PDF

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CN204474480U
CN204474480U CN201420824015.5U CN201420824015U CN204474480U CN 204474480 U CN204474480 U CN 204474480U CN 201420824015 U CN201420824015 U CN 201420824015U CN 204474480 U CN204474480 U CN 204474480U
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water
reverse osmosis
flat plate
nanofiltration
pressure
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王俊辉
刘慧�
杭天浜
赛世杰
刘丹茹
孟庆军
李思序
李乐
郭默然
姚红锐
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Inner Mongol Ke Kangrui Environmental Protection Technology Co Ltd Of A Specified Duration
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Inner Mongol Ke Kangrui Environmental Protection Technology Co Ltd Of A Specified Duration
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Abstract

A kind for the treatment of system of high slat-containing wastewater, belong to water technology, the equalizing tank → potassium permanganate composites → V-type filter tank connection → first paragraph ion exchange resin system → ultrafiltration system → first paragraph reverse osmosis system → second segment ion exchange resin system → high pressure nanofiltration system → second segment reverse osmosis system → high-pressure flat plate membranous system → MVR system of this system; High pressure nanofiltration system → high-pressure flat plate membranous system → freezing and crystallizing system connects; Ultrafiltration system → potassium permanganate composites; Adopt ultrafiltration, nanofiltration, reverse osmosis, high-pressure flat plate embrane method to be rationally coupled and the system process high slat-containing wastewater combined with MVR crystallization, freezing and crystallizing technology, cost is low, and working cost is low, non-secondary pollution, safety, compact construction, floor space is little, has higher economic worth.

Description

A kind for the treatment of system of high slat-containing wastewater
Technical field
The utility model belongs to water technology, relates to the high efficiency separation of salt in a kind of industrial high slat-containing wastewater and concentrated and crystallization technique, can effectively realize high slat-containing wastewater recycling.
Background technology:
The inorganic salt of the waste water discharged in Industrial processes often containing high density, as calcium ions and magnesium ions, chlorion, sodium ion, sulfate ion, these inorganic salt may be a large amount of inorganic salt that in chemical process, inorganic salt by-product or regulator solution acid-base neutralisation produce.If directly discharged by these high slat-containing wastewaters, river water quality salinity will be caused to improve, certainly will bring severe contamination to surface water, underground water, soil, aqueous bio etc., these will directly jeopardize our mankind itself's Health and Living environment.Along with China is to the attention of environment, " zero release, resource utilization " becomes the theme of environment protection.
In countries such as European Union, strict standard is formulated to the discharge of high slat-containing wastewater.But in China, the enterprise that water water displacement is large such as iron and steel, petrochemical industry, chemical industry, high slat-containing wastewater directly discharges usually.At present, the treatment process that China often adopts has multiple-effect evaporation, realizes being separated of salt and water.But what multiple-effect evaporation adopted is saturation steam, because government is to the reinforcement of monitoring of environment, and the rise of steam price, utilize evaporation process high slat-containing wastewater to be more and more difficult to realize.And the salt evaporated is the mixture of multiple salt, sodium sulfate salt major part still exists in waste water, is difficult to the waste water after recycle process.When adopting biological process to carry out process high slat-containing wastewater, inorganic salt to having obvious restraining effect, thus make microbial method process high-salt wastewater very difficult.
How by the inorganic salt in high slat-containing wastewater and utilization of wastewater resource, extremely urgent to the research of high-salt wastewater treatment technology, exploring effective separation of inorganic salt and the recycle of waste water in effective high slat-containing wastewater becomes one of process focus.
Summary of the invention:
The purpose of this utility model overcomes weak point of the prior art, the high efficiency separation of sodium-chlor, sodium sulfate salt in a kind of industrial high slat-containing wastewater and concentrated and crystallization processes are provided, this technique is not only simple to operate, and working cost is low, and is easy to realize operate continuously.
In order to achieve the above object, following for employing technical scheme is implemented by we:
A kind for the treatment of system of high slat-containing wastewater, comprise equalizing tank, equalizing tank is for collecting high slat-containing wastewater and regulating water quality and regulating and controlling the water yield, it is characterized in that: also comprise: always produce water tank, potassium permanganate composites, V-type filter tank, first paragraph ion exchange resin system, ultrafiltration system, first paragraph reverse osmosis system, second segment ion exchange resin system, high pressure nanofiltration system, second segment reverse osmosis system, high-pressure flat plate membranous system, MVR system and freezing and crystallizing system, described equalizing tank is connected with potassium permanganate composites by pipeline, potassium permanganate composites is connected with V-type filter tank by pipeline, V-type filter tank is connected with first paragraph ion exchange resin system by pipeline, first paragraph ion exchange resin system is connected with ultrafiltration system by pipeline, the dense water of ultrafiltration system is connected with potassium permanganate composites by pipeline, the product water of ultrafiltration system is connected with first paragraph reverse osmosis system by pipeline, the product water of first paragraph reverse osmosis system by pipeline with always produce water tank and be connected, the dense water of first paragraph reverse osmosis system is connected with second segment ion exchange resin system by pipeline, second segment ion exchange resin system is connected with high pressure nanofiltration system by pipeline, the product water of high pressure nanofiltration system is connected with second segment reverse osmosis system by pipeline, the product water of second segment reverse osmosis system by pipeline with always produce water tank and be connected, the dense water of second segment reverse osmosis system is connected with high-pressure flat plate membranous system by pipeline, the product water of high-pressure flat plate membranous system is by pipeline and the connection of always producing water tank, the dense water of high-pressure flat plate membranous system is connected with MVR system, the dense water of high pressure nanofiltration system is connected with high-pressure flat plate membranous system by pipeline, and the dense water of high-pressure flat plate membranous system is connected with freezing and crystallizing system by pipeline.
Further, described high pressure nanofiltration system comprises: charge pump, cartridge filter, high-pressure pump, recycle pump, nanofiltration membrane component, water tank is produced in the dense water tank of nanofiltration and nanofiltration, high slat-containing wastewater from second segment ion exchange resin system resin softening water tank enters cartridge filter by charging pump, the last filtration before nanofiltration membrane is carried out in cartridge filter, then be separated by entering nanofiltration membrane component under the effect of topping-up pump, a dense water part after nanofiltration enters the dense water tank of nanofiltration, a part loops back nanofiltration membrane component under the effect of recycle pump, the dense water tank of nanofiltration is connected by the import of pipeline with the charge pump of high-pressure flat plate membranous system system, nanofiltration is produced water and is entered nanofiltration product water tank, nanofiltration is produced water tank and is connected by the import of pipeline with the charge pump of second segment reverse osmosis system.
Further, described first paragraph or second segment reverse osmosis system comprise: charge pump, cartridge filter, high-pressure pump, recycle pump, reverse osmosis membrane assembly, reverse osmosis concentrated water tank, water is produced in ultrafiltration or nanofiltration product water is supplied to cartridge filter by charging pump, the last filtration before reverse osmosis membrane assembly is carried out in cartridge filter, then by entering first paragraph under the effect of topping-up pump or second segment reverse osmosis membrane assembly carries out desalination, the dense water produced enters the reverse osmosis concentrated water tank of first paragraph or second segment reverse osmosis system, the reverse osmosis concentrated water tank of first paragraph reverse osmosis system is connected by the resin column of pipeline with second segment ion exchange resin system, the reverse osmosis concentrated water tank of second segment reverse osmosis system is connected by the import of pipeline with the charge pump of high-pressure flat plate membranous system, the product water that first paragraph or second segment reverse osmosis system produce passes back into and always produces water tank, use as industrial circulating water.
Further, described high-pressure flat plate membranous system comprises: topping-up pump, charging pump, cartridge filter, high-pressure pump, high-pressure flat plate membrane module, sodium chloride solution storage tank, metabisulfite solution storage tank, from the dense water of the reverse osmosis concentrated water tank of the dense water tank of nanofiltration or second segment reverse osmosis system by topping-up pump supercharging, cartridge filter is supplied by charge pump, the last filtration before concentrating is carried out through cartridge filter, then under the effect of high-pressure pump, high-pressure flat plate membrane module is entered, dense water after high-pressure flat plate membrane module concentrates enters sodium chloride solution storage tank or metabisulfite solution storage tank, the backflow of product water enters always produces water tank, use as industrial circulating water.
Further, described high-pressure flat plate membrane module comprises three high-pressure flat plate membrane elements, three high-pressure flat plate membrane element classifications are arranged, the first step is made up of two high-pressure flat plate membrane elements, two high-pressure flat plate membrane elements form cascade, under the effect of high-pressure pump, enter second stage high-pressure flat plate membrane element by the dense water of a first step high-pressure flat plate membrane element part out to concentrate, a part of first step high-pressure flat plate membrane element that refluxes under the effect of recycle pump; A dense water part for second stage high-pressure flat plate membrane element enters sodium chloride solution storage tank or metabisulfite solution storage tank, a part of second stage high-pressure flat plate membrane element that refluxes under the effect of recycle pump.
Further, described MVR system or the water-in of freezing and crystallizing system are connected by the water outlet of pipeline with sodium chloride solution storage tank or metabisulfite solution storage tank, sodium chloride solution or metabisulfite solution obtain industrial chlorinations sodium or technical grade saltcake after MVR system or the process of freezing and crystallizing system, the distilled water that MVR system produces passes back into and always produces water tank, uses as industrial circulating water.
Further, a water outlet of described total product water tank is connected with a water-in of second segment ion exchange resin system by pipeline.
Beneficial effect
Owing to adopting the combination of nanofiltration system and coiled reverse osmosis membrane system, nanofiltration system is utilized effectively to retain divalent sulfur acid ion, realize being separated of sodium-chlor and sodium sulfate salt, utilize coiled reverse osmosis membrane system to produce water to nanofiltration to concentrate, improve its sodium chloride content, and do not need to concentrate further the dense water of nanofiltration of high sulfur acid sodium salt.Low cost just can realize the high efficiency separation of salt in waste water, to the rejection of sodium sulfate is, reduces in direct discharging of waste water physical environment, on the impact of animals and plants existence, realizes the recycling of salt in waste water.
This technique adopts novel high-pressure flat sheet membrane system to concentrate sodium-chlor and metabisulfite solution high power, to reduce subsequent production industrial chlorinations sodium, sodium sulfate salt cost, sodium-chlor, sodium sulfate is carried out to 3 times and concentrates.High-pressure flat plate membranous system does not need frequent cleaning, resistance to crocking energy consumption, and under high concentrtion, the cleaning interval can reach more than 3 weeks, and flux decline is less, can realize macrocyclic continuous operation.
This technique low cost, low working cost, non-secondary pollution, safety, compact construction, floor space is little, has higher economic worth.
Accompanying drawing explanation
Fig. 1 is process flow diagram of the present utility model;
Fig. 2 is the process flow sheet of the utility model MVR system;
Fig. 3 is the process flow sheet of the utility model freezing and crystallizing system;
Fig. 4 is the process flow sheet of the utility model high-pressure flat plate membranous system.
Embodiment
Below in conjunction with drawings and Examples, detailed description is carried out to the technical solution of the utility model.
As shown in Figure 1, a kind for the treatment of system of high slat-containing wastewater, comprise equalizing tank 1, equalizing tank 1 is for collecting high slat-containing wastewater and regulating water quality and regulating and controlling the water yield, this system also comprises: total product water tank 14, potassium permanganate composites 3, V-type filter tank 4, first paragraph ion exchange resin system 5, ultrafiltration system 6, first paragraph reverse osmosis system 7, second segment ion exchange resin system 8, high pressure nanofiltration system 9, second segment reverse osmosis system 10, high-pressure flat plate membranous system 11, MVR system 13 and freezing and crystallizing system 12, the water outlet of described equalizing tank 1 is connected by the water-in of pipeline with potassium permanganate composites 3, the water outlet of potassium permanganate composites 3 is connected by the water-in of pipeline with V-type filter tank 4, the water outlet in V-type filter tank 4 is connected by the water-in of pipeline with first paragraph ion exchange resin system 5, the water outlet of first paragraph ion exchange resin system 5 is connected by the water-in of pipeline with ultrafiltration system 6, the dense water out of ultrafiltration system 6 is connected with potassium permanganate composites 3 water-in by pipeline, the product water out of ultrafiltration system 6 is connected by the water-in of pipeline with first paragraph reverse osmosis system 7, the product mouth of a river of first paragraph reverse osmosis system 7 is connected with the water-in always producing water tank 14 by pipeline, the dense water out of first paragraph reverse osmosis system 7 is connected by the water-in of pipeline with second segment ion exchange resin system 8, the water outlet of second segment ion exchange resin system 8 is connected by the water-in of pipeline with high pressure nanofiltration system 9, the product water out of high pressure nanofiltration system 9 is connected by the water-in of pipeline with second segment reverse osmosis system 10, the product water out of second segment reverse osmosis system 10 is connected with the water-in always producing water tank 14 by pipeline, the dense water out of second segment reverse osmosis system 10 is connected by the water-in of pipeline with high-pressure flat plate membranous system 11, the product water out of high-pressure flat plate membranous system 11 is connected with the water-in always producing water tank 14 by pipeline, the dense water out of high-pressure flat plate membranous system 11 is connected with the water-in of MVR system 13, the dense water out of high pressure nanofiltration system 9 is connected by the water-in of pipeline with high-pressure flat plate membranous system 11, the product mouth of a river of high-pressure flat plate membranous system 11 is connected with the water-in always producing water tank 14 by pipeline, and the dense water out of high-pressure flat plate membranous system 11 is connected by the water-in of pipeline with freezing and crystallizing system 12.
One water outlet of described total product water tank 14 is connected with a water-in of second segment ion exchange resin system 8 by pipeline.
Embodiment:
With certain industrial high-salt wastewater for research object, high efficiency separation and concentrated experiment are carried out to the sodium-chlor in waste water and sodium sulfate.First detecting high slat-containing wastewater water quality is COD≤60mg/L, TDS≤9000mg/L, NaCl≤3000mg/L, Na 2sO 4≤ 6000mg/L, total hardness≤2600mg/L.
As shown in Figure 1, the present invention includes following processing unit: equalizing tank 1, total product water tank 14, potassium permanganate composites 3, V-type filter tank 4, first paragraph ion exchange resin system 5, ultrafiltration system 6, first paragraph reverse osmosis system 7, second segment ion exchange resin system 8, high pressure nanofiltration system 9, second segment reverse osmosis system 10, high-pressure flat plate membranous system 11, MVR evaporation and crystallization system 13 and freezing and crystallizing system 12, wherein, the high slat-containing wastewater of chemical industrial park discharge is connected with high slat-containing wastewater equalizing tank 1 by pipeline, equalizing tank 1 is carried out water quality and is connected with potassium permanganate composites 3 with pipeline by pump with after water yield modulation, the pipeline of potassium permanganate composites 3 front end is provided with the interpolation mouth of liquid caustic soda and carbonic acid gas, liquid caustic soda and carbonic acid gas is added by adding mouth, the waste gas that carbonic acid gas adopts factory to produce, liquid caustic soda adopts the liquid caustic soda of 25%, in pipeline, liquid caustic soda and carbonic acid gas mix with high slat-containing wastewater and enter in potassium permanganate composites 3 by pipeline, in the given time to the most calcium in high slat-containing wastewater and a small amount of silicon, the precipitation of magnesium mixed sediment, adds the bodied ferric sulfate of 8% ~ 12% again in potassium permanganate composites 3 and the PAM of 0.8% carries out coagulating sedimentation in settling tank, solid-liquid separation, remove the most of hardness in high slat-containing wastewater and calcium ions and magnesium ions, then, with the pH value 6.5 of high slat-containing wastewater in the hydrochloric acid readjustment potassium permanganate composites of 10% ~ 20%, residual carbon acid group in water is existed with the form of carbonic acid, avoid carbonate fouling, clorox with 5% ~ 15% carries out sterilization and disinfection process to high slat-containing wastewater in potassium permanganate composites 3, supernatant liquor after having processed flows into V-type filter tank 4 by pipeline and carries out filtration treatment, after potassium permanganate composites 3 precipitates, again through the filtration treatment in V-type filter tank 4, waste water reaches except hard effect, go out the water hardness and be down to 100ppm, then enter first paragraph ion exchange resin system 5 pairs of waste water and do further sofening treatment, make useless water hardness close to zero,
Waste water after first paragraph ion exchange resin system 5 sofening treatment enters ultrafiltration system 6 by pipeline and processes, dense water after ultrafiltration is back to potassium permanganate composites 3 by the dense water tank of ultrafiltration and precipitates, and the product water after ultrafiltration flows into first paragraph reverse osmosis system 7 and processes;
Product water after first paragraph reverse osmosis system 7 processes enters total product water tank 14, dense water after first paragraph reverse osmosis system 7 processes enters second segment ion exchange resin system 8 and carries out further sofening treatment, resin in described second segment ion exchange resin system 8 is that 5508 type antipollutions are except hardened resin, the hydrochloric acid of 4% and the liquid caustic soda of 5% is adopted to carry out resin regeneration, reuse water produces water tank 14 from total, set up second segment ion exchange resin system 8, make the hardness value of high slat-containing wastewater be reduced to close to 0, reduce subsequent film separation system operating load; Ion exchange resin system adopts 5508 type antipollutions to soften except hardened resin, and this resin has that adsorptive capacity is large, good stability, except hard feature thoroughly, be highly suitable for the process of high slat-containing wastewater;
Soft water after second segment ion exchange resin system 8 sofening treatment enters high pressure nanofiltration system 9 and processes, have employed the feature of the high rejection of high pressure nanofiltration system 9 pairs of divalence and high valence ion and the low rejection to monovalent ion, good Separation and Recovery is carried out to sodium sulfate and sodium-chlor, has made the sodium sulfate of recovery and sodium-chlor reach industrial standards;
After high pressure nanofiltration system 9 processes, obtain nanofiltration produce water and the dense water of nanofiltration, nanofiltration is produced water and is entered second segment reverse osmosis system 10, the dense water of nanofiltration enters high-pressure flat plate membranous system 11 by the dense water tank 9-6 of nanofiltration and processes, and described nanofiltration product water is the water containing monovalent ion; The dense water of described nanofiltration is the water containing divalence and high valence ion;
The product water that nanofiltration product water obtains after second segment reverse osmosis system 10 processes enters total product water tank 14, and the dense water obtained enters high-pressure flat plate film 11 system by reverse osmosis concentrated water tank 10-6 and processes;
Described high-pressure flat plate membranous system all adopts two-stage high-pressure flat plate membrane module cascaded structure, high-pressure flat plate film in high-pressure flat plate membrane module is a kind of reverse osmosis membrane of high pressure, the first step and second stage high-pressure flat plate membrane module designs pressure are respectively 120bar and 160bar, be applicable to high slat-containing wastewater of the present invention, carry out high multiple to the high slat-containing wastewater of process to concentrate and process, greatly reduce the running cost of follow-up MVR system 13 and freezing and crystallizing system 12.
The raw material of MVR system 13 is from the sodium chloride solution storage tank 11-8 of high-pressure flat plate membranous system 11, and the process through MVR system 13 obtains industrial chlorinations sodium.
The raw material of freezing and crystallizing system 12 is from the metabisulfite solution storage tank 11-9 of high-pressure flat plate membranous system 11, and the process through freezing and crystallizing system 12 obtains technical grade saltcake.
High-pressure sodium filter system in the implementation case adopts nanofiltration reverse osmosis membrane, first paragraph or second segment reverse osmosis system adopt coiled reverse osmosis membrane, high-pressure flat plate membranous system adopts high-pressure flat plate film, is water treatment field professional equipment, all can directly buys from film unit or order.
Above-mentioned content is set forth the basic frame structure of native system and total treatment scheme, below just several key component set forth:
1, first paragraph reverse osmosis system
As shown in Figure 1, described first paragraph reverse osmosis system 7 comprises: charge pump 7-1, cartridge filter 7-2, high-pressure pump 7-3, recycle pump 7-4, reverse osmosis membrane assembly 7-5, reverse osmosis concentrated water tank 7-6; Ultrafiltration is produced water and is supplied to by charging pump 7-1 the cartridge filter 7-2 that filter core is 5 μm of PP materials, the last filtration before reverse osmosis membrane assembly 7-5 is carried out in cartridge filter 7-2, remove wherein trace impurity and precipitation, prevent the precipitation from ultrafiltration product water to the impurity reverse osmosis membrane assembly process and formation from causing reverse osmosis membrane to pollute.Then under the effect of 30bar pressure, enter reverse osmosis membrane assembly 7-5 by topping-up pump 7-3 and carry out desalination, ratio of desalinization is about 84%, the dense water produced enters the reverse osmosis concentrated water tank 7-6 of first paragraph reverse osmosis system 7, the reverse osmosis concentrated water tank 7-6 of first paragraph reverse osmosis system is connected with a water-in of second segment ion exchange resin system 8 by pipeline, the product water produced passes back into total product water tank 2, use as industrial circulating water, the cost for wastewater treatment of reverse osmosis system is lower.
2, high pressure nanofiltration system
As shown in Figure 1, described high pressure nanofiltration system 9 comprises: water tank 9-7 is produced in charge pump 9-1, cartridge filter 9-2, high-pressure pump 9-3, recycle pump 9-4, nanofiltration membrane component 9-5, the dense water tank 9-6 of nanofiltration and nanofiltration, enter by charging pump 9-1 the cartridge filter 9-2 that filter core is 5 μm of PP materials by soft water after second segment ion exchange resin system 8 sofening treatment, the last filtration before nanofiltration membrane is carried out in cartridge filter 9-2, remove wherein trace impurity and precipitation, then under the effect of 8bar pressure, enter nanofiltration membrane component 9-5 by high-pressure pump 9-3 to be separated, the surface separation layer of nanofiltration membrane component 9-5 may have the micropore of about 1nm, it is 200 ~ 1000 that its relative molecular mass retains scope, the nanofiltration membrane structure overwhelming majority is multilayer short texture, because surface separation layer formed by gathering dielectric medium, there is a typical nanmu effect, namely to bivalent ions high rejection and the low rejection to monovalent ion.The rejection of nanofiltration membrane to sodium-chlor that this technique adopts is lower, to the rejection of divalent ion and sulfate ion up to more than 95%.The operating pressure that waste water enters nanofiltration membrane component 9-5 is 18bar, a dense water part after nanofiltration enters the dense water tank 9-6 of nanofiltration, a part loops back nanofiltration membrane component 9-5 under the effect of recycle pump 9-4, the dense water tank 9-6 of nanofiltration is connected by the water-in of pipeline with high-pressure flat plate membranous system 11, nanofiltration is produced water and is entered nanofiltration product water tank 9-7, and nanofiltration is produced water tank 9-7 and is connected by the water-in of pipeline with second segment reverse osmosis system.
The nanofiltration membrane system operating pressure that this technique adopts is relatively low, and flux is large, and process high-content waste water expense is 0.10 ~ 0.20 yuan/ton, and waste water is in the lower expense of the process of nanofiltration system.The nanofiltration membrane system of this technique adopts regular auto-flushing, reduces the pollution level of film, extends the work-ing life of film to a certain extent.
3, second segment reverse osmosis system
As shown in Figure 1, described second segment reverse osmosis system 10 comprises: charge pump 10-1, cartridge filter 10-2, high-pressure pump 10-3, recycle pump 10-4, reverse osmosis membrane assembly 10-5, reverse osmosis concentrated water tank 10-6, it is the cartridge filter 10-2 of 5 μm of PP materials that nanofiltration produces that water is supplied to through filter core by charging pump 10-1, the last filtration before reverse osmosis membrane assembly 10-5 is carried out in cartridge filter 10-2, remove wherein trace impurity and precipitation, prevent the precipitation from nanofiltration product water tank to the impurity reverse osmosis module 10-5 process and formation from causing reverse osmosis membrane to pollute, then under the effect of 30bar pressure, enter reverse osmosis membrane assembly 10-5 by topping-up pump 10-3 and carry out desalination, ratio of desalinization is about 84%, the dense water produced enters the reverse osmosis concentrated water tank 10-6 of second segment reverse osmosis system 10, the reverse osmosis concentrated water tank 10-6 of second segment reverse osmosis system is connected by the water-in of pipeline with high-pressure flat plate membranous system 11, the product water produced passes back into total product water tank 14, use as industrial circulating water, the cost for wastewater treatment of reverse osmosis system is lower.High pressure nanofiltration system has higher rejection to metabisulfite solution, namely nanofiltration dense water contains sodium sulfate amount is higher, concentrate so need not continue to pass into second segment reverse osmosis system, the cost for wastewater treatment of this reverse osmosis system is lower, and expense is probably 0.08 ~ 0.15 yuan/ton.
4, high-pressure flat plate membranous system
As shown in Figure 1 and Figure 4, described high-pressure flat plate membranous system 11 comprises: topping-up pump 11-1, charging pump 11-2, cartridge filter 11-3, recycle pump 11-4, high-pressure pump 11-5, high-pressure flat plate membrane module 11-5-1, high-pressure flat plate membrane module 11-5-2, high-pressure pump 11-6, high-pressure flat plate membrane module 11-7, sodium chloride solution storage tank 11-8, metabisulfite solution storage tank 11-9, the dense water of the nanofiltration dense water tank 9-5 of the dense water of the reverse osmosis concentrated water tank 10-6 of second segment reverse osmosis system 10 or high-pressure sodium filter system 9 enters described high-pressure flat plate membranous system 11 by water-in by pipeline, by topping-up pump 11-1 supercharging 1bar, be the cartridge filter 11-3 of 5 μm of PP materials again through filter core by charging pump 11-2, the last filtration before concentrating is carried out through cartridge filter 11-3, remove wherein trace impurity and precipitation, prevent from reverse osmosis concentrated water tank 10-6 or the dense water tank 9-5 of nanofiltration to high-pressure flat plate membrane module 11-5-1, impurity in high-pressure flat plate membrane module 11-5-2 and high-pressure flat plate membrane module 11-7 process and the precipitation of formation cause high-pressure flat plate fouling membrane, then under the effect of recycle pump 11-4 and high-pressure pump 11-5, enter high-pressure flat plate membrane module 11-5-1 and high-pressure flat plate membrane module 11-5-2, high-pressure flat plate membrane module is made up of the classification of three high-pressure flat plate films, the first step is by two high-pressure flat plate film 11-5-1, high-pressure flat plate film 11-5-2 assembly is composed in series, under the effect of high-pressure pump 11-6, enter secondary high-pressure flat plate membrane module 11-7 by the dense water of an one-level high-pressure flat plate membrane module part out to concentrate, part backflow first step high-pressure flat plate membrane module, produce water backflow and enter total product water tank 14, use as industrial circulating water.A dense water part of second stage high-pressure flat plate membrane module 11-7 enters sodium chloride solution storage tank 11-8 or metabisulfite solution storage tank 11-9, part backflow second stage high-pressure flat plate membrane module 11-7, and the backflow of product water enters always produces water tank 14, uses as industrial circulating water.The pressure that dense water enters one-level film is about 100 ~ 110bar, and the pressure entering secondary membrane is about 110 ~ 120bar.The enrichment factor of whole system up to 3 times, can produce Water Sproading rate more than 60%.
High-pressure flat plate film is a kind of reverse osmosis system of high pressure, and design pressure is the highest, and operating pressure up to 200bar, can be applicable to process high slat-containing wastewater, because its pressure is high, so still have higher cycles of concentration to high concentration aqueous's material.
5, freezing and crystallizing system 12
As shown in figures 1 and 3, described freezing and crystallizing system 12 comprises: charging pump 12-1, refrigerator 12-2, crystallizer 12-4, centrifugal separating device 12-3, Matter Transfer pump 12-5; Dense water from metabisulfite solution storage tank 11-9 enters crystallizer 12-4 under the effect of charging pump 12-1, by the circulation of Matter Transfer pump 12-5, refrigerator 12-2 carries out circulation temperature lowering to crystallizer 12-4, in the process of constantly circulation, along with the reduction of temperature, sodium sulfate in dense water can be separated out, formation salt is starched, salt slurry enters centrifugal separating device 12-3 by Matter Transfer pump 12-5 and carries out solid-liquid separation, obtain saltcake and frozen centrifugation mother liquor, the freezing mother liquor that centrifugal separating device 12-3 discharges finally enters MVR system and carries out evaporative crystallization.
6, MVR system 13
As depicted in figs. 1 and 2, described MVR system comprises: material balance tank 13-1, charging pump 13-2, preheater 13-3-1 and 13-3-2, Matter Transfer pump 13-4, vaporizer 13-5, separator 13-6, centrifugal separating device 13-7, dense water from the sodium chloride solution storage tank 11-8 of high-pressure flat plate membranous system 11 enters material balance tank 13-1, preheater 13-3-1 is entered and preheater 13-3-2 carries out preheating by charging pump 13-2, then enter in vaporizer 13-5 by Matter Transfer pump 13-4, by the intensification of cyclic steam, dense water starts evaporation, then dense water enters into separator 13-6, circulating and evaporating is carried out by Matter Transfer pump from separator 13-6 dense water out, along with the increase of cycle index, moisture evaporation in dense water, formation salt is starched, finally enter centrifugal separating device 13-7 from separator 13-6 salt slurry out to carry out solid-liquid separation and obtain sodium-chlor crystallization and MVR mother liquor, enter freezing and crystallizing system from the MVR mother liquor of centrifugal separating device 13-7 discharge and carry out Freeze crystallization.
The whole technique of the present invention adopts programmable logic controller (PLC), realizes the Automatic control and measure of electrical equipment and instrument simultaneously.This process system regularly adopts and produces water as wash-down water, the pollutent inside and outside flushing membrane, and set up corresponding in-site chemical cleaning system, with ensure system long-term stability, run efficiently.

Claims (7)

1. the treatment system of a high slat-containing wastewater, comprise equalizing tank, equalizing tank is for collecting high slat-containing wastewater and regulating water quality and regulating and controlling the water yield, it is characterized in that: also comprise: always produce water tank, potassium permanganate composites, V-type filter tank, first paragraph ion exchange resin system, ultrafiltration system, first paragraph reverse osmosis system, second segment ion exchange resin system, high pressure nanofiltration system, second segment reverse osmosis system, high-pressure flat plate membranous system, MVR system and freezing and crystallizing system, described equalizing tank is connected with potassium permanganate composites by pipeline, potassium permanganate composites is connected with V-type filter tank by pipeline, V-type filter tank is connected with first paragraph ion exchange resin system by pipeline, first paragraph ion exchange resin system is connected with ultrafiltration system by pipeline, the dense water of ultrafiltration system is connected with potassium permanganate composites by pipeline, the product water of ultrafiltration system is connected with first paragraph reverse osmosis system by pipeline, the product water of first paragraph reverse osmosis system by pipeline with always produce water tank and be connected, the dense water of first paragraph reverse osmosis system is connected with second segment ion exchange resin system by pipeline, second segment ion exchange resin system is connected with high pressure nanofiltration system by pipeline, the product water of high pressure nanofiltration system is connected with second segment reverse osmosis system by pipeline, the product water of second segment reverse osmosis system by pipeline with always produce water tank and be connected, the dense water of second segment reverse osmosis system is connected with high-pressure flat plate membranous system by pipeline, the product water of high-pressure flat plate membranous system is by pipeline and the connection of always producing water tank, the dense water of high-pressure flat plate membranous system is connected with MVR system, the dense water of high pressure nanofiltration system is connected with high-pressure flat plate membranous system by pipeline, and the dense water of high-pressure flat plate membranous system is connected with freezing and crystallizing system by pipeline.
2. the treatment system of a kind of high slat-containing wastewater according to claim 1, it is characterized in that: described high pressure nanofiltration system comprises: charge pump, cartridge filter, high-pressure pump, recycle pump, nanofiltration membrane component, water tank is produced in the dense water tank of nanofiltration and nanofiltration, high slat-containing wastewater from second segment ion exchange resin system resin softening water tank enters cartridge filter by charging pump, the last filtration before nanofiltration membrane is carried out in cartridge filter, then be separated by entering nanofiltration membrane component under the effect of topping-up pump, a dense water part after nanofiltration enters the dense water tank of nanofiltration, a part loops back nanofiltration membrane component under the effect of recycle pump, the dense water tank of nanofiltration is connected by the import of pipeline with the charge pump of high-pressure flat plate membranous system system, nanofiltration is produced water and is entered nanofiltration product water tank, nanofiltration is produced water tank and is connected by the import of pipeline with the charge pump of second segment reverse osmosis system.
3. the treatment system of a kind of high slat-containing wastewater according to claim 1, it is characterized in that: described first paragraph or second segment reverse osmosis system comprise: charge pump, cartridge filter, high-pressure pump, recycle pump, reverse osmosis membrane assembly, reverse osmosis concentrated water tank, water is produced in ultrafiltration or nanofiltration product water is supplied to cartridge filter by charging pump, the last filtration before reverse osmosis membrane assembly is carried out in cartridge filter, then by entering first paragraph under the effect of topping-up pump or second segment reverse osmosis membrane assembly carries out desalination, the dense water produced enters the reverse osmosis concentrated water tank of first paragraph or second segment reverse osmosis system, the reverse osmosis concentrated water tank of first paragraph reverse osmosis system is connected by the resin column of pipeline with second segment ion exchange resin system, the reverse osmosis concentrated water tank of second segment reverse osmosis system is connected by the import of pipeline with the charge pump of high-pressure flat plate membranous system, the product water that first paragraph or second segment reverse osmosis system produce passes back into and always produces water tank, use as industrial circulating water.
4. the treatment system of a kind of high slat-containing wastewater according to claim 1, it is characterized in that: described high-pressure flat plate membranous system comprises: topping-up pump, charging pump, cartridge filter, high-pressure pump, high-pressure flat plate membrane module, sodium chloride solution storage tank, metabisulfite solution storage tank, from the dense water of the reverse osmosis concentrated water tank of the dense water tank of nanofiltration or second segment reverse osmosis system by topping-up pump supercharging, cartridge filter is supplied by charge pump, the last filtration before concentrating is carried out through cartridge filter, then under the effect of high-pressure pump, high-pressure flat plate membrane module is entered, dense water after high-pressure flat plate membrane module concentrates enters sodium chloride solution storage tank or metabisulfite solution storage tank, the backflow of product water enters always produces water tank, use as industrial circulating water.
5. the treatment system of a kind of high slat-containing wastewater according to claim 4, it is characterized in that: described high-pressure flat plate membrane module comprises three high-pressure flat plate membrane elements, three high-pressure flat plate membrane element classifications are arranged, the first step is made up of two high-pressure flat plate membrane elements, two high-pressure flat plate membrane elements form cascade, under the effect of high-pressure pump, enter second stage high-pressure flat plate membrane element by the dense water of a first step high-pressure flat plate membrane element part out to concentrate, a part of first step high-pressure flat plate membrane element that refluxes under the effect of recycle pump; A dense water part for second stage high-pressure flat plate membrane element enters sodium chloride solution storage tank or metabisulfite solution storage tank, a part of second stage high-pressure flat plate membrane element that refluxes under the effect of recycle pump.
6. the treatment system of a kind of high slat-containing wastewater according to claim 1, it is characterized in that: described MVR system or the water-in of freezing and crystallizing system are connected by the water outlet of pipeline with sodium chloride solution storage tank or metabisulfite solution storage tank, sodium chloride solution or metabisulfite solution obtain industrial chlorinations sodium or technical grade saltcake after MVR system or the process of freezing and crystallizing system, the distilled water that MVR system produces passes back into and always produces water tank, uses as industrial circulating water.
7. the treatment system of a kind of high slat-containing wastewater according to claim 1 or 2 or 3, is characterized in that: a water outlet of described total product water tank is connected with a water-in of second segment ion exchange resin system by pipeline.
CN201420824015.5U 2014-12-22 2014-12-22 A kind for the treatment of system of high slat-containing wastewater Active CN204474480U (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104787951A (en) * 2014-12-22 2015-07-22 内蒙古久科康瑞环保科技有限公司 A treatment system for high-salt waste water
CN105540976A (en) * 2016-01-28 2016-05-04 新疆环境工程技术有限责任公司 Coal chemical strong brine zero emission and salt screening technology

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104787951A (en) * 2014-12-22 2015-07-22 内蒙古久科康瑞环保科技有限公司 A treatment system for high-salt waste water
CN105540976A (en) * 2016-01-28 2016-05-04 新疆环境工程技术有限责任公司 Coal chemical strong brine zero emission and salt screening technology

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