CN107915364A - It is a kind of using Physical and the process for preparing water and device of near-zero release - Google Patents

It is a kind of using Physical and the process for preparing water and device of near-zero release Download PDF

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Publication number
CN107915364A
CN107915364A CN201711350574.1A CN201711350574A CN107915364A CN 107915364 A CN107915364 A CN 107915364A CN 201711350574 A CN201711350574 A CN 201711350574A CN 107915364 A CN107915364 A CN 107915364A
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China
Prior art keywords
water
ion
equipment
liquid outlet
waste liquid
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CN201711350574.1A
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Chinese (zh)
Inventor
邓忠友
唐平
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Sichuan difite Environmental Protection Technology Co.,Ltd.
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Sichuan Difeite Environmental Protection Equipment Co
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Priority to CN201711350574.1A priority Critical patent/CN107915364A/en
Publication of CN107915364A publication Critical patent/CN107915364A/en
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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
    • 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
    • C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
    • 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
    • C02F1/02—Treatment of water, waste water, or sewage by heating
    • C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
    • 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
    • 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
    • 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
    • C02F2001/007—Processes including a sedimentation step
    • 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
    • C02F1/42—Treatment of water, waste water, or sewage by ion-exchange
    • C02F2001/425—Treatment of water, waste water, or sewage by ion-exchange using cation exchangers
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
    • C02F2103/02—Non-contaminated water, e.g. for industrial water supply
    • C02F2103/04—Non-contaminated water, e.g. for industrial water supply for obtaining ultra-pure water
    • 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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  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Separation Using Semi-Permeable Membranes (AREA)

Abstract

The invention discloses a kind of using Physical and the process for preparing water and device of near-zero release, including：Water treatment unit, it includes raw water cistern, water filtration device, Na-ion exchanger, accurate filter and RO equipment；Liquid waste processing and recovery unit, it includes regenerated flow container, filter press, the first nanofiltration separation equipment, DTRO membrane separation plants, the second nanofiltration separation equipment and evaporator.The present invention using Physical and the process for preparing water and device of near-zero release, the process for preparing water built using complementary technique, and the regenerative agent in ion-exchanger is recycled, the high concentration salt bearing liquid wastes produced in water treatment procedure are recycled at the same time, reduce the cost of water process.

Description

It is a kind of using Physical and the process for preparing water and device of near-zero release
Technical field
The invention belongs to water-treatment technology field, and in particular to a kind of process for preparing water using Physical and near-zero release and Device.
Background technology
With the increasingly scarcity of water resource, to improve water utilization rate, while mitigate and produced because of sewage discharge Environmental protection pressure, all trades and professions are handled and recycled to technique waste water caused by itself.
But there are the problem of the following aspects for existing water treatment technology：1st, handle Halite water it is more intractable and Cost is high, and since the origin cause of formation of Halite water is very much, then existing process has its limitation for raw water sodium salt content and chloride content height； 2nd, water treatment procedure addition chemical reagent, thus brings new chemical contamination；3rd, the regeneration of ion-exchanger needs to consume big The sodium chloride of amount.
The content of the invention
It is an object of the invention to：For above-mentioned problem, there is provided a kind of using Physical and near-zero release Process for preparing water and device, the process for preparing water built using complementary technique, and the regenerative agent in ion-exchanger is circulated Use, while the high concentration salt bearing liquid wastes to being produced in water treatment procedure recycle, and reduce the cost of water process.
To achieve these goals, the technical solution adopted by the present invention is：Give up the invention discloses high-efficiency low-emission compound Structure ion switch, including：
Water treatment unit, it includes raw water cistern, water filtration device, Na-ion exchanger, accurate filter and RO and sets Standby, the inlet of the water filtration device is connected with raw water cistern, the liquid outlet and sodium ion exchange of the water filtration device The inlet connection of device, the liquid outlet of the Na-ion exchanger are connected with the inlet of accurate filter, the secondary filter The liquid outlet of device is connected with the inlet of RO equipment；
Liquid waste processing and recovery unit, it includes regenerated flow container, filter press, the first nanofiltration separation equipment, DTRO films point From equipment, the second nanofiltration separation equipment and evaporator, the waste liquid import of the regenerated flow container and the waste liquid of Na-ion exchanger Outlet, the waste liquid outlet of the waste liquid import of the regenerated flow container also with the second nanofiltration separation equipment connect, the regeneration The waste liquid outlet of waste liquid tank and the waste liquid inlet communication of filter press, the waste liquid outlet of the filter press and the first nanofiltration separation equipment Waste liquid inlet communication, the liquid outlet of the first nanofiltration separation equipment connects with raw water cistern, first nanofiltration separation The waste liquid outlet of equipment and the waste liquid inlet communication of DTRO membrane separation plants, the waste liquid imports of the DTRO membrane separation plants also with The waste liquid outlet connection of RO equipment, the liquid outlet of the DTRO membrane separation plants are connected with raw water cistern, the DTRO films point From the waste liquid outlet of equipment and the waste liquid inlet communication of the second nanofiltration separation equipment, the liquid outlet and sodium of the second nanofiltration equipment Inlet, the evaporator of ion-exchanger are connected with raw water cistern.
Preferably, the water filtration device includes pre-filtering equipment and ultrafiltration apparatus, and the pre-filtering equipment goes out liquid Mouth is connected with the inlet of ultrafiltration apparatus, and the waste liquid outlet of the ultrafiltration apparatus is also connected with sewage-treatment plant.
Preferably, it is provided with water pump between the raw water cistern and water filtration device.
The present invention provides a kind of using Physical and the process for preparing water of near-zero release, by the feedwater comprising calcium and magnesium Calcium ion and magnesium ion remove, and the brine waste to being produced in reaction is handled and recycled, to prepare soft water product, The process for preparing water includes：
(a) water treatment steps, remove calcium ion and magnesium ion by the feedwater in Na-ion exchanger, then will remove The feedwater of calcium ion and magnesium ion is gone, to remove sodium ion, to obtain concentrated solution containing sodium ion and pure water by RO equipment；
(b) brine waste processing and recycling step, the concentrated solution containing sodium ion obtained in water treatment steps are carried out multiple Concentration, then by the concentrated solution containing sodium ion after concentration by the first nanofiltration separation equipment isolate monovalence zwitterion solution with High price zwitterion solution；Monovalence zwitterion solution is back to Na-ion exchanger, as Na-ion exchanger regenerative agent Calcium in Na-ion exchanger and magnesium are cemented out, while obtain the concentration liquor of calcic and magnesium ion, realizes sodium ion The regeneration of exchanger；Then again by the concentration liquor of calcic and magnesium ion and high price zwitterion concentrate solution reacted with Precipitated calcium and magnesium, while obtain saline solns；Saline solns are obtained into carnallite solution and chlorination by the second nanofiltration separation equipment Sodium clear water solution, carnallite solution are back in feedwater, and sodium chloride clear water solution is concentrated into RO equipment, the chlorination after concentration Sodium clear water solution passes through the first nanofiltration separation equipment.
Preferably, the multiple that the concentrated solution containing sodium ion obtained in water treatment steps (a) repeatedly concentrates is 100 times, is contained 50 times of the multiple that the concentration liquor of calcium and magnesium ion is concentrated, the sodium chloride clear water solution obtained in water treatment steps (b) It is concentrated into 5-10% concentration.
Preferably, the RO equipment in water treatment steps (a) is two-stage RO, contains sodium by what is obtained in water treatment steps (a) Ion concentrated solution first passes sequentially through two-stage sea water desalination and DTRO membrane separation plants, is finally passed into the first nanofiltration separation equipment again In.
Preferably, the feedwater in water treatment steps (a) uses bottom in and top out in Na-ion exchanger, at brine waste Monovalence zwitterion solution in reason and recycling step (b) uses upper entering and lower leaving in Na-ion exchanger.
Preferably, the feedwater of water treatment steps (a) first passes through pretreatment to remove silt in feedwater and other are solid Body particle.
Preferably, a part for the monovalence zwitterion solution in brine waste processing and recycling step (b) is being steamed Send out crystallization in device.
By adopting the above-described technical solution, the beneficial effects of the invention are as follows：
1st, Physical of the invention and the water generator of near-zero release, using water filtration device：Exist in classified filtering water Granule foreign, colloid, suspended matter and organic matter etc., reach the inflow requirement of rear class demineralizer and RO equipment；Accurate mistake Filter equipment：Filtering intercepts the impurity such as the shredded resin produced in demineralizer operation, protects level-one RO equipment；Na-ion exchanger： Calcium ions and magnesium ions in water etc. are carried out with displacement sorption using cation exchange resin, regenerative agent sodium chloride is utilized after efficiency lost resin to tree Fat is recovered, and it is restored one's working ability, and calcium ions and magnesium ions are discharged by effluent, because the water for discharging waste liquid is few, The high power concentration of calcium ions and magnesium ions is substantially realized, main component is calcium chloride, magnesium chloride and regeneration excessive residual sodium chloride, skill In art means 50-100 times of calcium ions and magnesium ions can be realized easily to concentrate, easily with carbonic acid in the concentrate that is produced in RO water preparation processes The high-valence anions such as root carry out precipitated chemical reaction.Because calcium ions and magnesium ions have thoroughly removed in water, rear class RO and nanofiltration are played Long-acting protective effect；RO equipment：Because the deep or light water ratio of its level-one is about 1:4, namely raw water can dissolve composition by its concentrate 5 times of concentration, as multistage pure water process requirements, on this basis carries out level-one pure water depth purifying, is such as zero-emission demand, need Multistage concentration is carried out to its concentrate, makes its solubility that approaches to saturation as far as possible, prepares for back segment crystallizing evaporator, main ingredient For sodium salt, because crystallizing evaporator input and operating cost are very high, in this technique zero-emission process line, using multistage RO's Purpose is at utmost to concentrate, and reduces end evaporator input, it might even be possible to which, without evaporator, the input series of RO films is really It is fixed, it is so that chlorine ion concentration in concentrated water is concentrated into 5-10%, it is striking point it is possessed as regenerative agent；Level-one seawater is light Change and two level sea water desalination is handled：It is the deep or light moisture for having a kind of special film " sea water desalination membrane " progress water using RO films From a certain proportion of concentrated water of output and fresh water；DTRO membrane separation plants：Desalt processing, and RO films are carried out for Halite water A kind of special applications, output concentrated water and fresh water；Nanofiltration separation equipment：Selectivity using NF membrane to ion, intercepts high price Zwitterion, filters monovalent ion, (is that monovalence zwitterion is molten because containing a large amount of sodium ions and chlorion in above-mentioned concentrate Liquid), its percent of pass can reach 85%, the main ingredient of monovalence zwitterion solution be sodium chloride needed for softening equipment regeneration into Part, in addition, also containing a large amount of sodium chloride in regeneration liquid waste, after calcium ions and magnesium ions are deposited in regeneration liquid waste, remain and contain in aqueous solution There are sodium chloride and unprecipitated carnallite solution, once salt need to be divided to recycle, improve the utilization rate of sodium chloride, Given this in waste water Necessarily contain calcium ions and magnesium ions, therefore a point salt is carried out using low pressure NF membrane, and periodically carry out nanofiltration equipment cleaning.
2nd, Physical of the invention and the process for preparing water of near-zero release, when in water containing larger amount of easily fouling cation, Such as calcium ions and magnesium ions, influence membrane treatment process greatly, using the pre-softening equipment of low waste discharge amount, to carry out calcium ions and magnesium ions in water Processing and concentration.Then because raw water calcium ions and magnesium ions have removed, can not have to add antisludging agent and prepare by membrane technology pure Water, while the raw water concentrate without calcium ions and magnesium ions can be obtained, the multistage concentrate of film section carries out salt point by NF membrane From obtaining with sodium chloride concentrate as the main component and with high price salt carnallite concentrate as the main component.Sodium chloride concentrates Liquid is utilized as required regenerant recycle in Na-ion exchanger in technique, though concentration is unsatisfactory for crystallization condition, is met pre- soft Change equipment regenerative agent needed for concentration, and reduce sodium chloride regenerative agent is dissolved in traditional softening process and concentration control Problem, while high price salt concentrate is mixed with calcium ions and magnesium ions concentrate, it is produced chemical precipitation.After precipitating filtering It can carry out being used for raw water supply after carrying out sodium chloride salt recycling, by water full dose reuse.After calcium ions and magnesium ions largely precipitate, even if Crystallization processes must be used, can also avoid evaporator device from pernicious fouling hidden danger occur.For the angle of system, this water side processed Method contribution is pure water needed for technique, realizes the preparation process that no chemical agent adds, greatly reduces pure water preparation cost；Separately A kind of contribute is inexpensive Zero-discharge treating process, its output water is recycled as technique raw water, and output material is pre- place Regenerative agent needed for managing sodium ion soft water preparation technique, reduces the concentrate scale of construction for needing crystallization and evaporation.It is in raw water to produce solid waste Intrinsic precipitable composition (predominantly miemite, sulfuric acid calcium and magnesium etc., economic value is not high, the composition of several non-environmental-pollutions), nothing New pollution sources.
Brief description of the drawings
Fig. 1 is the present invention using Physical and the structure diagram of the water generator of near-zero release；
Fig. 2 is the present invention using Physical and the process flow chart of the process for preparing water of near-zero release；
Fig. 3 is the technological process using Physical and the water treatment steps (a) of the process for preparing water of near-zero release of the present invention Figure；
Fig. 4 is the present invention using the processing of the brine waste of Physical and the process for preparing water of near-zero release and recycling step (b) process flow chart；
Reference numeral：1- water treatment unit, 2- liquid waste processings and recovery unit, 3- raw water cisterns, 4- water filtration devices, 5- Na-ion exchangers, 6- accurate filters, 7-RO equipment, 8-DTRO membrane separation plants, 9- regenerated flow containers, 10- filter presses, 11- the first nanofiltration separation equipment, 12- the second nanofiltration separation equipment, 13- evaporators.
Embodiment
, below will be in the embodiment of the present invention to make the purpose, technical scheme and advantage of the embodiment of the present invention clearer Technical solution be clearly and completely described.The person that is not specified actual conditions in embodiment, builds according to normal condition or manufacturer The condition of view carries out.Reagents or instruments used without specified manufacturer, is the conventional production that can be obtained by commercially available purchase Product.
The present invention is made specifically using Physical and the process for preparing water and device of near-zero release with reference to embodiment It is bright.
As shown in Figure 1, the present invention using Physical and the water generator of near-zero release, including：
Water treatment unit 1, it includes raw water cistern 3, water filtration device 4, Na-ion exchanger 5,6 and of accurate filter RO equipment 7, the inlet of the water filtration device 4 are connected with raw water cistern 3, the liquid outlet and sodium of the water filtration device 4 The inlet connection of ion-exchanger 5, the liquid outlet of the Na-ion exchanger 5 are connected with the inlet of accurate filter 6, institute The liquid outlet for stating accurate filter 6 is connected with the inlet of RO equipment 7；
Liquid waste processing and recovery unit 2, it include regenerated flow container 9, filter press 10, the first nanofiltration separation equipment 11, DTRO membrane separation plants 8, the second nanofiltration separation equipment 12 and evaporator 13, the waste liquid import of the regenerated flow container 9 and sodium from The waste liquid outlet connection of sub- exchanger 5, the waste liquid of the waste liquid import of the regenerated flow container 9 also with the second nanofiltration separation equipment 12 Outlet, the waste liquid outlet of the regenerated flow container 9 and the waste liquid inlet communication of filter press 10, the waste liquid of the filter press 10 Outlet and the waste liquid inlet communication of the first nanofiltration separation equipment 11, liquid outlet and the raw water of the first nanofiltration separation equipment 11 store Pond 3 connects, the waste liquid outlet of the first nanofiltration separation equipment 11 and the waste liquid inlet communication of DTRO membrane separation plants 8, institute State waste liquid outlet of the waste liquid import of DTRO membrane separation plants 8 also with RO equipment 7 to connect, the DTRO membrane separation plants 8 go out Liquid mouth is connected with raw water cistern 3, the waste liquid of the waste liquid outlet of the DTRO membrane separation plants 8 and the second nanofiltration separation equipment 12 Inlet communication, the liquid outlet of the second nanofiltration equipment and the inlet of Na-ion exchanger 5, evaporator 13 and raw water cistern 3 connect.
The water filtration device 4 includes pre-filtering equipment and ultrafiltration apparatus, the liquid outlet of the pre-filtering equipment and ultrafiltration The inlet connection of equipment, the waste liquid outlet of the ultrafiltration apparatus are also connected with sewage-treatment plant, sewage-treatment plant processing The waste water of a small amount of ultrafiltration apparatus discharge.
Water pump is provided between the raw water cistern 3 and water filtration device 4.
As shown in figs 2-4, the workflow of the invention using Physical and the water generator of near-zero release is as follows：
1st, water treatment steps (a), pass through water filtration device 4 (such as pre-filtering equipment and ultrafiltration by the water in raw water cistern 3 Equipment) treating nature water is carried out, to remove silt therein or other bulky grains, raw water is then passed into sodium ion again and is handed over In parallel operation 5, by sodium ion exchange resin replace raw water in calcium and magnesium, then by soft water by accurate filter 6, into one Step removes the fine particle in soft water, avoids soft water from entering in RO equipment 7 and results in blockage to RO films, goes out from accurate filter 6 The soft water come is first passed into transition buffer pond and keeps in buffering transition, then desalinates by two-stage RO equipment 7, passes through two-stage RO Equipment 7 obtains concentrated solution containing sodium ion and this process cycles of concentration after desalinating be 5 times, obtains concentrated solution containing sodium ion and pure water Product；Chemical reagent is not used in whole process engineering, effectively prevents from producing new chemical contamination in water treatment procedure, while first Calcium and magnesium is removed using Na-ion exchanger 5, effectively prevents the blocking to the RO films of RO equipment 7；
2nd, brine waste processing and recycling step (b), will produce in 7 desalination process of RO equipment in above water treatment procedure Concentrated solution containing sodium ion (containing carbonate, bicarbonate radical, sulfate radical, potassium ion etc.), in addition containing 5 processing and exchanging of Na-ion exchanger After a period of time, by calcium ions and magnesium ions combination saturation on the sodium ion exchange resin in Na-ion exchanger 5, at this moment need pair Sodium ion exchange resin regenerate, it is necessary to regenerative agent (sodium chloride solution) is passed through into Na-ion exchanger 5, displace calcium and magnesium from The solution of son, passes sequentially through two-stage sea water desalination processing by the sodium ion solution that RO equipment 7 produces and DTRO membrane separation plants 8 is light Change is handled, and the fresh water of generation is back to raw water cistern 3；And the concentrated water (containing sodium ion) of the solution containing sodium ion is by the dense of multistage After contracting, concentration is 20 times when just going out RO equipment 7, is being passed into the second nanofiltration separation equipment 12, isolate monovalence negative and positive from Sub- solution (as sodium chloride solution, main component sodium chloride, concentration 5-10%) and high price zwitterion solution (main component The high price such as sodium acid carbonate, sodium sulphate salt), monovalence zwitterion solution is back to displacement calcium ions and magnesium ions in Na-ion exchanger 5, and High price zwitterion solution is back in regenerated flow container 9, while the calcic magnesium ion out of Na-ion exchanger 5 out is molten Liquid concentrates 50 times and enters in regenerated flow container 9, and the solution of calcic magnesium ion produces the high price salt precipitation of calcium ions and magnesium ions, Ran Houcong The solution obtained in regenerated flow container 9 is first passed into filter press 10, filters out precipitation, and the solution come out from filter press 10 enters back into To the first nanofiltration separation equipment 11, from the first nanofiltration separation equipment 11 isolating carnallite solution is back to raw water cistern 3 In, the sodium chloride solution isolated from the first nanofiltration separation equipment 11, which is entered in DTRO equipment 7, to be concentrated, and carries out same work Skill cyclic process；When the quantum of output of the monovalence zwitterion solution come out from the second nanofiltration separation equipment 12 is excessive, can pass through Evaporator 13 crystallizes excessive sodium chloride, maintains the output of sodium chloride to balance, and output steam or condensation water can be used as water mistake processed The water temperature of journey keeps heat source；Realize recycling for the waste liquid in whole method.
Feedwater in water treatment steps (a) uses bottom in and top out, brine waste processing and recycling in Na-ion exchanger Monovalence zwitterion solution in step (b) uses upper entering and lower leaving in Na-ion exchanger, monovalence zwitterion solution be containing The concentrated solution of sodium chloride.Since calcium ions and magnesium ions are larger compared to the molecular weight of sodium ion, monovalence negative and positive in recycling step (b) from Sub- solution and sodium chloride solution ensure the calcium being incorporated on sodium ion exchange resin in Na-ion exchanger 5 using upper entering and lower leaving Magnesium ion can be replaced out completely, ensure the efficiency of displacement.
Embodiments described above is part of the embodiment of the present invention, instead of all the embodiments.The reality of the present invention The detailed description for applying example is not intended to limit the scope of claimed invention, but is merely representative of the selected implementation of the present invention Example.Based on the embodiments of the present invention, those of ordinary skill in the art are obtained without creative efforts Every other embodiment, belongs to the scope of protection of the invention.

Claims (9)

  1. It is 1. a kind of using Physical and the water generator of near-zero release, it is characterised in that including：
    Water treatment unit (1), it includes raw water cistern (3), water filtration device (4), Na-ion exchanger (5), secondary filter Device (6) and RO equipment (7), the inlet of the water filtration device (4) are connected with raw water cistern (3), the water filtration device (4) liquid outlet is connected with the inlet of Na-ion exchanger (5), the liquid outlet of the Na-ion exchanger (5) and accurate mistake The inlet connection of filter (6), the liquid outlet of the accurate filter (6) are connected with the inlet of RO equipment (7)；
    Liquid waste processing and recovery unit (2), it includes regenerated flow container (9), filter press (10), the first nanofiltration separation equipment (11), DTRO membrane separation plants (8), the second nanofiltration separation equipment (12) and evaporator (13), the regenerated flow container (9) are given up Liquid import is connected with the waste liquid outlet of Na-ion exchanger (5), the waste liquid import of the regenerated flow container (9) also with the second nanofiltration The waste liquid outlet connection of separation equipment (12), the waste liquid outlet of the regenerated flow container (9) and the waste liquid import of filter press (10) The waste liquid inlet communication of connection, the waste liquid outlet of the filter press (10) and the first nanofiltration separation equipment (11), described first receives The liquid outlet of filter separation equipment (11) is connected with raw water cistern (3), the waste liquid outlet of the first nanofiltration separation equipment (11) With the waste liquid inlet communication of DTRO membrane separation plants (8), the waste liquid imports of the DTRO membrane separation plants (8) also with RO equipment (7) waste liquid outlet connection, the liquid outlet of the DTRO membrane separation plants (8) are connected with raw water cistern (3), the DTRO films The waste liquid inlet communication of the waste liquid outlet of separation equipment (8) and the second nanofiltration separation equipment (12), the second nanofiltration equipment Liquid outlet is connected with the inlet, evaporator (13) and raw water cistern (3) of Na-ion exchanger (5).
  2. 2. as claimed in claim 1 using Physical and the water generator of near-zero release, it is characterised in that the water filtration is set Standby (4) include pre-filtering equipment and ultrafiltration apparatus, and the liquid outlet of the pre-filtering equipment is connected with the inlet of ultrafiltration apparatus, institute The waste liquid outlet for stating ultrafiltration apparatus is also connected with sewage-treatment plant.
  3. 3. as claimed in claim 1 using Physical and the water generator of near-zero release, it is characterised in that the raw water water storage Water pump is provided between pond (3) and water filtration device (4).
  4. It is 4. a kind of using Physical and the process for preparing water of near-zero release, it is characterised in that by the calcium in the feedwater comprising calcium and magnesium Ion and magnesium ion remove, and the brine waste to being produced in reaction is handled and recycled, to prepare soft water product, institute Stating process for preparing water includes：
    (a) water treatment steps, remove calcium ion and magnesium ion by the feedwater in Na-ion exchanger (5), then will remove The feedwater of calcium ion and magnesium ion is gone to remove sodium ion, to obtain concentrated solution containing sodium ion and pure water by RO equipment (7)；
    (b) brine waste processing and recycling step, the concentrated solution containing sodium ion obtained in water treatment steps (a) are carried out repeatedly dense Contracting, then isolates monovalence zwitterion solution by the concentrated solution containing sodium ion after concentration by the first nanofiltration separation equipment (11) With high price zwitterion solution；Monovalence zwitterion solution is back to Na-ion exchanger (5), as Na-ion exchanger (5) regenerative agent cements out the calcium in Na-ion exchanger (5) and magnesium, while the concentrate for obtaining calcic and magnesium ion is molten Liquid, realizes the regeneration of Na-ion exchanger (5)；Then it is again that the concentration liquor and high price zwitterion of calcic and magnesium ion is dense Contracting solution is reacted with precipitated calcium and magnesium, while obtains saline solns；Saline solns are passed through into the second nanofiltration separation equipment (12) carnallite solution and sodium chloride clear water solution are obtained, carnallite solution is back in feedwater, and sodium chloride clear water solution is set into RO Standby (7) are concentrated, and the sodium chloride clear water solution after concentration passes through the first nanofiltration separation equipment (11).
  5. 5. as claimed in claim 4 using Physical and the process for preparing water of near-zero release, it is characterised in that water treatment steps (a) multiple that the concentrated solution containing sodium ion obtained in repeatedly concentrates is 100 times, and the concentration liquor progress of calcic and magnesium ion is dense 50 times of the multiple of contracting, the sodium chloride clear water solution obtained in water treatment steps (b) are concentrated into 5-10% concentration.
  6. 6. as claimed in claim 5 using Physical and the process for preparing water of near-zero release, it is characterised in that water treatment steps (a) the RO equipment (7) in is two-stage RO, and the solution containing sodium ion obtained in water treatment steps (a) is first passed sequentially through to two-stage sea Water is desalinated and DTRO membrane separation plants (8), is finally passed into again in the first nanofiltration separation equipment (11).
  7. 7. as claimed in claim 4 using Physical and the process for preparing water of near-zero release, it is characterised in that water treatment steps (a) feedwater in uses bottom in and top out, the monovalence in brine waste processing and recycling step (b) in Na-ion exchanger (5) Zwitterion solution uses upper entering and lower leaving in Na-ion exchanger (5).
  8. 8. as claimed in claim 4 using Physical and the process for preparing water of near-zero release, it is characterised in that water treatment steps (a) feedwater first passes through pretreatment to remove silt and other solid particles in feedwater.
  9. 9. as claimed in claim 4 using Physical and the process for preparing water of near-zero release, it is characterised in that at brine waste The crystallization in evaporator (13) of reason and a part for the monovalence zwitterion solution in recycling step (b).
CN201711350574.1A 2017-12-15 2017-12-15 It is a kind of using Physical and the process for preparing water and device of near-zero release Pending CN107915364A (en)

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105800885A (en) * 2016-05-23 2016-07-27 北京今大禹环境技术股份有限公司 Resource recycling and treatment system of high-concentration degradation-resistant salt-containing organic waste water
CN107381886A (en) * 2017-08-02 2017-11-24 北京廷润膜技术开发股份有限公司 A kind of method of reverse osmosis concentrated water near-zero release
CN207845401U (en) * 2017-12-15 2018-09-11 四川迪菲特环保设备有限公司 It is a kind of using Physical and the water generator of near-zero release

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105800885A (en) * 2016-05-23 2016-07-27 北京今大禹环境技术股份有限公司 Resource recycling and treatment system of high-concentration degradation-resistant salt-containing organic waste water
CN107381886A (en) * 2017-08-02 2017-11-24 北京廷润膜技术开发股份有限公司 A kind of method of reverse osmosis concentrated water near-zero release
CN207845401U (en) * 2017-12-15 2018-09-11 四川迪菲特环保设备有限公司 It is a kind of using Physical and the water generator of near-zero release

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