CN104445780A - Method and equipment for treating and recycling high-concentration complex wastewater through nanometer membrane distillation - Google Patents
Method and equipment for treating and recycling high-concentration complex wastewater through nanometer membrane distillation Download PDFInfo
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- CN104445780A CN104445780A CN201410703851.2A CN201410703851A CN104445780A CN 104445780 A CN104445780 A CN 104445780A CN 201410703851 A CN201410703851 A CN 201410703851A CN 104445780 A CN104445780 A CN 104445780A
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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
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
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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
- C02F1/447—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by membrane distillation
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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
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/12—Halogens or halogen-containing 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 relates to a method and equipment for treating and recycling high-concentration complex wastewater through nanometer membrane distillation. The method comprises steps as follows: adjusting the pH value of raw water, filtering and separating wastewater, heating the filtered water, treating the filtered water with a nanometer membrane, performing waste heat recovery and outputting purified product water. The equipment comprises a reaction device, a lift pump, a pre-filter, a cartridge filter, a heat energy recovery device, a heat exchanger and a nanometer membrane distillation system. The method and the equipment have the advantages as follows: the method is high in wastewater treatment efficiency; COD and inorganic salt ions in the wastewater are intercepted effectively; the energy consumption is low, and waste heat in industrial production can be used as a penetration driving force; the treatment process is simple and the operation is stable; the purification of the wastewater can be realized and the recovery rate of the wastewater can be increased with the method; the whole equipment occupies a small area and is compact in structure, simple to operate, easy to control and maintain and low in operation cost; the equipment is not sensitive to dissolved solid, chlorine, low-pH-value or biological pollution in the wastewater, complex pretreatment processes are not required, and membrane scaling is avoided.
Description
Technical field
The present invention relates to the complicated method for waste water of a kind of nanometer film distillation treatment and reuse high density and equipment, is that a kind of nanometer film technology combines with distillation technique treatment and reuse high density complexity method for waste water and equipment.
Background technology
Existing film distillation technology has the following disadvantages:
1, film distillation technology is widely used in sea water desaltination and white wine upgrading field, has small part to apply at nuclear industry, dyeing industry, medicine company and grocery trade, but it is very rare to be applied in the complicated waste water aspect of high density.The film majority that existing film distillation technology adopts is hollow-fibre membrane, and small part adopts spiral, flat and rolled membrane module; Great majority are microporous membrane, and small part has used nanometer film.Its common ground is the form that most of film distillation technology all adopts pressure reducing film distillation, adopt the apparatus system of seepage slope, membrane module is hydrophobic microporous membrane, its ultimate principle be the hot solution of separated material by film time, produce optionally transport phenomenon, produce gaseous substance at the opposite side of film, become liquid through condensation, its motivating force is the pressure difference of film both sides and the steam pressure difference of separated material.So the complicated waste water of reuse high density becomes a kind of trend in water treatment applications, is also a technical barrier simultaneously.
2, high salt amount COD, ammonia nitrogen, phenol, sulfide is contained in the complicated waste water of high density, and containing toxicant, there is higher oleaginousness and colourity, the complicated waste water of present stage high density all adopts biological process and physico-chemical process to process substantially, but high salinity (TDS is higher than 30000mg/l) has restraining effect for biology, and physico-chemical process cannot process.So the complicated waste water of reuse high density becomes a kind of trend in water treatment applications, is also a technical barrier simultaneously.
3, there are some problems in the existing technical study about the complicated waste water recycling of high density, method and principle, the technology of " combined system and the method that utilize membrane distillation process trade effluent " is called in China Patent No. 2012100775152, name, in the recycling of the dense draining of Industrial reverse osmosis, its feature is: comprise the trade effluent preprocessing subsystem, reverse osmosis system and the pressure reducing film distillation system that connect successively, and pressure-reduction distillation device is two-stage distribution.In reverse osmosis concentrated water outlet regulating pH value, it is made to be subacidity; Add Scale inhibitors at the dense water out of first step pressure reducing film distillation, avoid the fouling membrane in subsequent concentration process.The shortcoming of above-mentioned technique is: technical process is longer, and pretreatment technology is complicated, and pressure-reduction distillation device is two-stage distribution, and resource utilization is low, and cost is high; Although reverse osmosis system takes filtration, adds the pre-treatment measures such as Scale inhibitors, the impurity in water still can be gathered in film surface and cause fouling membrane, reduces separation rate and the permeation rate of film; Add Scale inhibitors at the dense water out of first step pressure reducing film distillation, ionic concn is too high, and Scale inhibitors cannot reach scale inhibition object.
Summary of the invention
An object of the present invention is, overcome the shortcoming of prior art, provide a kind of nanometer film to distill the complicated method for waste water for the treatment of and reuse high density.The method is that nanometer film technology combines with distillation technique the method for the complicated waste water for the treatment of and reuse high density, and processing efficiency is high, the COD in effectively catching waste water and inorganic ion; Energy expenditure is low, and the waste heat of Industrial processes can be utilized as infiltration impellent; Treating processes is simple, stable; Water is diffused through the matrix of a nano-scale, molecular solids by the method, thus realizes useless water purification, improves the rate of recovery of waste water.
Another object of the present invention is, provide a kind of equipment for the complicated method for waste water of nanometer film distillation treatment and reuse high density of the present invention, this equipment complete machine takes up an area few, and close structure is simple to operate, and be easy to control, easily safeguard, working cost is low; Equipment is insensitive to soluble solid, chlorine, low ph value or biological pollution in waste water, without the need to the pretreatment process of complexity, without film scale problems.
The complicated method for waste water technical scheme of a kind of nanometer film distillation treatment and reuse high density of the present invention is:
The complicated method for waste water of a kind of nanometer film distillation treatment and reuse high density, it comprises the steps:
A, regulate the pH value of former water: adjust ph in reaction unit, this adjustment the complicated waste water of high density and former water is injected into have in the complicated wastewater equalization pond of high density, adds medicament to realize by chemicals dosing plant;
B, filtering separation waste water: the waste water of adjust ph through lift pump supercharging, then carries out solid-liquid separation process through fore filter to the solid particulate matter in waste water, and the waste water through separating treatment is delivered to cartridge filter filter;
C, filtered water to be heated up: the filtered water of step B enters heat-energy recovering apparatus and recycles waste heat, then enter interchanger and through the external steam from steam-pipe, the water temperature of filtered water is promoted;
D, nanometer film process filtered water: the filtered water of step C hyperthermic treatment enters nanometer film Distallation systm and carries out nanometer film distillation process; This treating processes is: vacuumize nanometer film water distilling apparatus with vacuum pump, form the steam pressure difference of hot and cold both sides water, the liquid phase water of hot side is transferred to cold side in face vaporization, exist in the form of water vapour, for reduction concentration polarization and fouling membrane are on the impact of system cloud gray model, the filtered water heated up in hot side is by pipeline and internal circulation pump UNICOM;
E, waste heat recovery and output purified product water: the water vapor through nanometer film water distilling apparatus enters heat-energy recovering apparatus, is lowered the temperature by product water through filtered water, heat filtered water simultaneously, finally exports the purified product water for recycling.
Further technical scheme is:
The described complicated method for waste water of nanometer film distillation treatment and reuse high density, described former water, pollution substance wherein comprises high salinity, COD, ammonia nitrogen, phenol and sulfide; Also have toxicant and oleaginous materials and have the one in these three kinds of materials of color species, or 2 kinds, or 3 kinds.
The described complicated method for waste water of nanometer film distillation treatment and reuse high density, the complicated wastewater equalization pond of described high density, has a chemicals dosing plant at least; The waste water ph being injected into fore filter after adjust ph is 5 ~ 8.
The described complicated method for waste water of nanometer film distillation treatment and reuse high density, in described adjustment former water pH value step, adds medicament and has one group at least; Its composition of described medicament is alkalescence, or acid, for adjust ph.
The complicated method for waste water of described nanometer film distillation treatment and reuse high density is be raised to 70 DEG C through the water temperature of filtered water being promoted from the external steam of steam-pipe described in its step C; Described external steam is the afterheat steam from plant area.
The described complicated method for waste water of nanometer film distillation treatment and reuse high density, through filtered water, product water being carried out cooling described in its step e is be reduced to 35 DEG C from 70 DEG C.
Equipment and technology scheme for the complicated method for waste water of nanometer film distillation treatment and reuse high density of the present invention is:
For an equipment for the complicated method for waste water of nanometer film of the present invention distillation treatment and reuse high density, sequentially pass through by method flow the device that pipeline connects and comprise: the reaction unit of the former water of UNICOM, lift pump, fore filter, cartridge filter, heat-energy recovering apparatus, interchanger and nanometer film Distallation systm; Described reaction unit comprises the complicated wastewater equalization pond of high density and chemicals dosing plant, for regulating the pH value of original waste water; Described fore filter is used for the solid particulate of reaction unit to separate, and exports the waste water of separating treatment; The lift pump for lifting liquid to the fore filter through reaction unit being made filtration treatment is connected with between reaction unit and fore filter; Cartridge filter import connects fore filter, and outlet connects heat-energy recovering apparatus, for removing fine particles; Interchanger two import is connected with steam-pipe and heat-energy recovering apparatus respectively, for raising the water temperature of filtered water; Nanometer film water distilling apparatus in nanometer film Distallation systm is used for filtered water to concentrate, vacuum pump is used for vacuumizing membrane module cold side, form steam pressure difference, thus make liquid phase water be converted into water vapor, internal circulation pump is for reducing the impact of concentration polarization on system cloud gray model; Heat-energy recovering apparatus is used for the product water for cooling through nanometer film water distilling apparatus, filtered water is heated simultaneously, finally produces the purified product water for recycling.
Further technical scheme is:
The described equipment for the complicated method for waste water of nanometer film distillation treatment and reuse high density, its reaction unit is made up of the complicated wastewater equalization pond of one or two high density and at least one chemicals dosing plant.
The described equipment for the complicated method for waste water of nanometer film distillation treatment and reuse high density, its interchanger has two imports, and one of them import is connected with heat-energy recovering apparatus, for inputting the filtered water through energy recovery, another import is connected with steam-pipe, for inputting external steam; Have two discharge outlets, one of them discharge outlet is connected with nano-film filtration device, and for exporting the steam through heat exchange, another discharge outlet is the delivery port of purified product water.
The described equipment for the complicated method for waste water of nanometer film distillation treatment and reuse high density, its heat-energy recovering apparatus has two imports, one of them import is connected with cartridge filter, for inputting the filtered water that security personnel filter, another import is connected with nano-film filtration device, for inputting the product water of intensification; Have two discharge outlets, one of them discharge outlet is connected with interchanger, and for exporting the filtered water through energy recovery, another discharge outlet is the delivery port of purified product water.
The major technique effect of the complicated method for waste water of nanometer film of the present invention distillation treatment and reuse high density and equipment and ultimate principle are described as follows:
1, first the present invention regulates pH value to 5 ~ 8 of former water, then carries out pre-treatment to waste water, removes the suspended substance in water; Like this, avoid the normal operation of subsequent technique is impacted;
2, heat up (being elevated to 70 DEG C from 35 DEG C) through interchanger through pretreated filtered water, enter nanometer film Distallation systm; In nanometer film assembly, the side of nano-sized membrane directly contacts with filtered water, utilizes vacuum pump to vacuumize membrane module cold side, forms the steam pressure difference of hot and cold both sides water, the liquid phase water of hot side is transferred to cold side in face vaporization, thus makes liquid phase water be converted into water vapor; Hot side filtered water is designed with internal recycle, can reduce the impact that concentration polarization and fouling membrane produce membrane module;
3, the water vapor produced through membrane module is converted into liquid-phase pure water purification after water condensation (being reduced to 35 DEG C from 70 DEG C) after filtration, makes the filtered water rising temperature reclamation latent heat of vaporization simultaneously, realizes the recovery of heat energy; Along with the continuous inflow of waste water, the Pollutant levels of nanometer film Distallation systm raise gradually, when reaching set(ting)value, and system stalls, will concentrate waste water and discharge, system starts further work;
The membrane module of the nanometer film water distilling apparatus 4, in the present invention is hydrophobic rolled film, so nanometer film Distallation systm and technique thereof greatly reduce the floor space of equalizing tank; And its membrane module is highly selective permeable membrane, water molecules is only allowed to pass through, can dissolved organic matter in effectively catching waste water and inorganic ion;
5, the nanometer film water distilling apparatus in the present invention forms removal to COD, ammonia nitrogen, phenol, sulfide, toxicant, oil and other pollutent and separating technology together with aforesaid equipment, without the need to the pretreatment process of complexity, except the dense water of small part, do not form secondary wastewater, COD can be concentrated to 100,000 and more than, inorganic ion can be concentrated into more than 20%; It is separated motivating force is temperature head, the waste heat of Industrial processes can be utilized as infiltration impellent, even also can well run under the condition of Low Temperature Difference (being low to moderate 3 DEG C);
6, the present invention makes waste water by the membrane module of a nano-scale, and crossing water termination itself does not have hole, without the problem of film fouling;
In sum, principle of the present invention to enter the waste water adjust ph before nanometer film Distallation systm, and removing solid particulate matter, avoids impacting the normal operation of subsequent technique; And due to its nanofilmstructures and feature, have that processing efficiency is high, energy expenditure is low, treating processes is simple, without film scale problems, and whole set equipment takes up an area less, close structure, affected simple, the feature such as working cost is low.
Accompanying drawing explanation
Fig. 1 is wastewater treatment of the present invention and reuse method schematic flow sheet;
Fig. 2 is wastewater treatment of the present invention and reuse method and equipment schematic diagram.
In figure, the name of each Reference numeral is called:
1-reaction unit; The complicated wastewater equalization pond of 1.1-high density; 1.2-chemicals dosing plant; 2-lift pump; 3-fore filter; 4-cartridge filter; 5-heat-energy recovering apparatus; 6-interchanger; 7-nanometer film Distallation systm; 7.1-nanometer film water distilling apparatus; 7.2 internal circulation pump; 7.3 vacuum pump; The former water of 8-; 9-steam-pipe; 10-purified product water.
Embodiment
Be described further as follows to a kind of nanometer film of the present invention distillation complicated method for waste water for the treatment of and reuse high density and equipment in conjunction with the accompanying drawings and embodiments:
embodiment 1:it is the basic embodiment of a kind of nanometer film distillation complicated method for waste water for the treatment of and reuse high density of the present invention.As shown in Figure 1, 2, it comprises the steps: the complicated method for waste water of a kind of nanometer film distillation treatment and reuse high density, and it comprises the steps:
A, regulate the pH value of former water: adjust ph in reaction unit 1, this adjustment complicated for high density waste water and former water 8 is injected into have in the complicated wastewater equalization pond 1.1 of high density, adds medicament to realize by chemicals dosing plant 1.2;
B, filtering separation waste water: the waste water of adjust ph is through lift pump 2 supercharging, then the solid particulate matter in fore filter 3 pairs of waste water carries out solid-liquid separation process, and the waste water through separating treatment is delivered to cartridge filter 4 filter;
C, filtered water to be heated up: the filtered water of step B enters heat-energy recovering apparatus 5 and recycles waste heat, then enter interchanger 6, through the external steam from steam-pipe 9, filtered water is raised to certain altitude;
D, nanometer film process filtered water: the filtered water of step C hyperthermic treatment enters nanometer film Distallation systm 7 and carries out nanometer film distillation process; This treating processes is: vacuumize with vacuum pump 7.3 pairs of nanometer film water distilling apparatus 7.1, form the steam pressure difference of hot and cold both sides water, the liquid phase water of hot side is transferred to cold side in face vaporization, exist in the form of water vapour, for reduction concentration polarization and fouling membrane are on the impact of system cloud gray model, the filtered water heated up in hot side is by pipeline and internal circulation pump 7.2 UNICOM;
E, waste heat recovery and output purified product water: the water vapor through nanometer film water distilling apparatus 7.1 enters heat-energy recovering apparatus 5, is lowered the temperature by product water through filtered water, heat filtered water simultaneously, finally exports the purified product water 10 for recycling.
embodiment 2:it is the further embodiment on embodiment 1 basis.Described former water 8, pollution substance wherein comprises high salinity, COD, ammonia nitrogen, phenol and sulfide; Also have toxicant and oleaginous materials and have the one in these three kinds of materials of color species, or 2 kinds, or 3 kinds.The complicated wastewater equalization pond 1.1 of described high density, has a chemicals dosing plant 1.2 at least; The waste water ph being injected into fore filter 2 after adjust ph is 5 ~ 8.In described adjustment former water pH value step, add medicament and have one group at least; Its composition of described medicament is alkalescence, or acid, for adjust ph; When former water 8 does not need adjust ph, chemicals dosing plant 1.2 can not dosing.Described in described step C through from steam-pipe 9 external steam by the water temperature of filtered water promote be raised to 70 DEG C; Described external steam is the afterheat steam from plant area.Through filtered water, product water being carried out cooling described in described step e is be reduced to 35 DEG C from 70 DEG C.
embodiment 3:it is a kind of basic embodiment of equipment for the complicated method for waste water of nanometer film distillation treatment and reuse high density of the present invention.As shown in Figure 2, described equipment, sequentially passing through by method flow the device that pipeline connects has: the reaction unit 1 of the former water 8 of UNICOM, lift pump 2, fore filter 3, cartridge filter 4, heat-energy recovering apparatus 5, interchanger 6 and nanometer film Distallation systm 7; Described reaction unit 1 comprises the complicated wastewater equalization pond 1.1 of high density and chemicals dosing plant 1.2, for regulating the pH value of original waste water; Described fore filter 3, for being separated by the solid particulate of reaction unit 1, exports the waste water of separating treatment; The lift pump 2 for lifting liquid to the fore filter 3 through reaction unit 1 being made filtration treatment is connected with between reaction unit 1 and fore filter 3; Cartridge filter 4 import connects fore filter 3, and outlet connects heat-energy recovering apparatus 5, for removing fine particles, meets the requirement of subsequent handling to water inlet; Interchanger 6 liang of imports are connected with steam-pipe 9 and heat-energy recovering apparatus 5 respectively, for raising the water temperature of filtered water; Nanometer film water distilling apparatus 7.1 in nanometer film Distallation systm 7 is for concentrating filtered water, vacuum pump 7.2 is for vacuumizing membrane module cold side, form steam pressure difference, thus make liquid phase water be converted into water vapor, internal circulation pump 7.1 is for reducing the impact of concentration polarization on system cloud gray model; Heat-energy recovering apparatus 5 for by the product water for cooling through nanometer film water distilling apparatus 7.1 to 35 DEG C, simultaneously by filtered water heat, finally produce for recycle purified product water 10.
embodiment 4:it is further embodiment on the basis of embodiment 3.Described reaction unit 1 is made up of the complicated wastewater equalization pond 1.1 of one or two high density and at least one chemicals dosing plant 1.2.Described interchanger 6 has two imports, and one of them import is connected with heat-energy recovering apparatus 5, and for inputting the filtered water through energy recovery, another import is connected with the steam-pipe 9 of the conveying waste heat from plant area, for inputting external steam; Have two discharge outlets, one of them discharge outlet is connected with nano-film filtration device 7.1, and for exporting the steam through heat exchange, another discharge outlet is the delivery port of purified product water 10.Described heat-energy recovering apparatus 5 has two imports, and one of them import is connected with cartridge filter 4, and for inputting the filtered water that security personnel filter, another import is connected with nano-film filtration device 7.1, for inputting the product water of intensification; Have two discharge outlets, one of them discharge outlet is connected with interchanger 6, and for exporting the filtered water through energy recovery, another discharge outlet is the delivery port of purified product water 10.
The claims in the present invention protection domain is not limited to above-described embodiment.
Claims (10)
1. the complicated method for waste water of nanometer film distillation treatment and reuse high density, it is characterized in that, it comprises the steps:
A, regulate the pH value of former water: adjust ph in reaction unit (1), this adjustment complicated for high density waste water and former water (8) is injected into have in the complicated wastewater equalization pond (1.1) of high density, adds medicament to realize by chemicals dosing plant (1.2);
B, filtering separation waste water: the waste water of adjust ph through lift pump (2) supercharging, then carries out solid-liquid separation process through fore filter (3) to the solid particulate matter in waste water, and the waste water through separating treatment is delivered to cartridge filter (4) and filter;
C, filtered water to be heated up: the filtered water of step B enters heat-energy recovering apparatus (5) and recycles waste heat, then enter interchanger (6) and through the external steam from steam-pipe (9), the water temperature of filtered water is promoted;
D, nanometer film process filtered water: the filtered water of step C hyperthermic treatment enters nanometer film Distallation systm (7) and carries out nanometer film distillation process; This treating processes is: vacuumize nanometer film water distilling apparatus (7.1) with vacuum pump (7.3), form the steam pressure difference of hot and cold both sides water, the liquid phase water of hot side is transferred to cold side in face vaporization, exist in the form of water vapour, for reduction concentration polarization and fouling membrane are on the impact of system cloud gray model, the filtered water heated up in hot side is by pipeline and internal circulation pump (7.2) UNICOM;
E, waste heat recovery and output purified product water: the water vapor through nanometer film water distilling apparatus (7.1) enters heat-energy recovering apparatus (5), through filtered water, product water is lowered the temperature, filtered water being heated simultaneously, finally exporting the purified product water (10) for recycling.
2. the complicated method for waste water of nanometer film distillation treatment and reuse high density according to claim 1, it is characterized in that, described former water (8), pollution substance wherein comprises high salinity, COD, ammonia nitrogen, phenol and sulfide; Also have toxicant and oleaginous materials and have the one in these three kinds of materials of color species, or 2 kinds, or 3 kinds.
3. the complicated method for waste water of nanometer film distillation treatment and reuse high density according to claim 1 and 2, is characterized in that, the complicated wastewater equalization pond (1.1) of described high density, has a chemicals dosing plant (1.2) at least; The waste water ph being injected into fore filter (2) after adjust ph is 5 ~ 8.
4. the complicated method for waste water of nanometer film distillation treatment and reuse high density according to claim 1, is characterized in that, in described adjustment former water pH value step, add medicament and have one group at least; Its composition of described medicament is alkalescence, or acid, for adjust ph.
5. the complicated method for waste water of nanometer film according to claim 1 distillation treatment and reuse high density, is characterized in that, is rise to 70 DEG C through the water temperature of filtered water being promoted from the external steam of steam-pipe (9) described in step C; Described external steam is the afterheat steam from plant area.
6. the complicated method for waste water of nanometer film distillation treatment and reuse high density according to claim 1, it is characterized in that, through filtered water, product water being carried out cooling described in step e is be reduced to 35 DEG C from 70 DEG C.
7. the equipment for the complicated method for waste water of claim 1 nanometer film distillation treatment and reuse high density, it is characterized in that, sequentially pass through by method flow the device that pipeline connects and comprise: the reaction unit (1) of UNICOM Yuan Shui (8), lift pump (2), fore filter (3), cartridge filter (4), heat-energy recovering apparatus (5), interchanger (6) and nanometer film Distallation systm (7); Described reaction unit (1) comprises the complicated wastewater equalization pond (1.1) of high density and chemicals dosing plant (1.2), for regulating the pH value of original waste water; Described fore filter (3), for being separated by the solid particulate of reaction unit (1), exports the waste water of separating treatment; The lift pump (2) for lifting liquid to the fore filter (3) through reaction unit (1) being made filtration treatment is connected with between reaction unit (1) and fore filter (3); Cartridge filter (4) import connects fore filter (3), and outlet connects heat-energy recovering apparatus (5), for removing fine particles; Interchanger (6) two import is connected with steam-pipe (9) and heat-energy recovering apparatus (5) respectively, for raising the water temperature of filtered water; Nanometer film water distilling apparatus (7.1) in nanometer film Distallation systm (7) is for concentrating filtered water, vacuum pump (7.2) is for vacuumizing membrane module cold side, form steam pressure difference, thus making liquid phase water be converted into water vapor, internal circulation pump (7.1) is for reducing the impact of concentration polarization on system cloud gray model; Heat-energy recovering apparatus (5), for through the product water for cooling of nanometer film water distilling apparatus (7.1), filtered water will be heated simultaneously, finally produces the purified product water (10) for recycling.
8. according to claim 7 for the equipment of the complicated method for waste water of nanometer film distillation treatment and reuse high density, it is characterized in that, described reaction unit (1) is made up of the complicated wastewater equalization pond (1.1) of one or two high density and at least one chemicals dosing plant (1.2).
9. according to claim 7 for the equipment of the complicated method for waste water of nanometer film distillation treatment and reuse high density, it is characterized in that, described interchanger (6) has two imports, one of them import is connected with heat-energy recovering apparatus (5), for inputting the filtered water through energy recovery, another import is connected with steam-pipe (9), for inputting external steam; Have two discharge outlets, one of them discharge outlet is connected with nano-film filtration device (7.1), and for exporting the steam through heat exchange, another discharge outlet is the delivery port of purified product water (10).
10. according to claim 7 for the equipment of the complicated method for waste water of nanometer film distillation treatment and reuse high density, it is characterized in that, described heat-energy recovering apparatus (5) has two imports, one of them import is connected with cartridge filter (4), for inputting the filtered water that security personnel filter, another import is connected with nano-film filtration device (7.1), for inputting the product water of intensification; Have two discharge outlets, one of them discharge outlet is connected with interchanger (6), and for exporting the filtered water through energy recovery, another discharge outlet is the delivery port of purified product water (10).
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| CN108726636A (en) * | 2018-06-04 | 2018-11-02 | 中广核工程有限公司 | A kind of method and system of membrane distillation processing waste water |
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