CN101935111A - Wastewater recycling preparation system with low energy consumption - Google Patents
Wastewater recycling preparation system with low energy consumption Download PDFInfo
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- CN101935111A CN101935111A CN 201010265113 CN201010265113A CN101935111A CN 101935111 A CN101935111 A CN 101935111A CN 201010265113 CN201010265113 CN 201010265113 CN 201010265113 A CN201010265113 A CN 201010265113A CN 101935111 A CN101935111 A CN 101935111A
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- 239000002351 wastewater Substances 0.000 title claims abstract description 51
- 238000004064 recycling Methods 0.000 title claims abstract description 33
- 238000002360 preparation method Methods 0.000 title claims abstract description 25
- 238000005265 energy consumption Methods 0.000 title claims abstract description 23
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 196
- 239000012528 membrane Substances 0.000 claims abstract description 98
- 238000001223 reverse osmosis Methods 0.000 claims abstract description 81
- 238000001728 nano-filtration Methods 0.000 claims abstract description 73
- 238000005070 sampling Methods 0.000 claims abstract description 12
- 238000004140 cleaning Methods 0.000 claims abstract description 8
- 239000007788 liquid Substances 0.000 claims abstract description 6
- 238000002203 pretreatment Methods 0.000 claims description 6
- 230000000051 modifying Effects 0.000 claims description 5
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- 238000004519 manufacturing process Methods 0.000 abstract description 7
- 150000003839 salts Chemical class 0.000 abstract description 3
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- 238000004065 wastewater treatment Methods 0.000 abstract description 2
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- 238000011065 in-situ storage Methods 0.000 abstract 1
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- 235000019600 saltiness Nutrition 0.000 description 21
- 150000002500 ions Chemical class 0.000 description 16
- 238000010612 desalination reaction Methods 0.000 description 13
- 238000004821 distillation Methods 0.000 description 8
- 229910000831 Steel Inorganic materials 0.000 description 7
- 238000011084 recovery Methods 0.000 description 7
- 239000010959 steel Substances 0.000 description 7
- 230000000694 effects Effects 0.000 description 5
- 238000000909 electrodialysis Methods 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 5
- 238000011033 desalting Methods 0.000 description 4
- 230000005684 electric field Effects 0.000 description 4
- 239000010908 plant waste Substances 0.000 description 4
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- 239000007864 aqueous solution Substances 0.000 description 3
- 239000012141 concentrate Substances 0.000 description 3
- 230000003247 decreasing Effects 0.000 description 3
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- 238000011069 regeneration method Methods 0.000 description 3
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- 238000007599 discharging Methods 0.000 description 2
- 239000012153 distilled water Substances 0.000 description 2
- 239000003456 ion exchange resin Substances 0.000 description 2
- 229920003303 ion-exchange polymer Polymers 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 239000000463 material Substances 0.000 description 2
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- 229920005989 resin Polymers 0.000 description 2
- 241000195493 Cryptophyta Species 0.000 description 1
- CVTZKFWZDBJAHE-UHFFFAOYSA-N [N].N Chemical compound [N].N CVTZKFWZDBJAHE-UHFFFAOYSA-N 0.000 description 1
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- OYPRJOBELJOOCE-UHFFFAOYSA-N calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
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- 239000011575 calcium Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
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- 238000005260 corrosion Methods 0.000 description 1
- 238000002242 deionisation method Methods 0.000 description 1
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- 239000003014 ion exchange membrane Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
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Abstract
The invention relates to a wastewater recycling preparation system with low energy consumption, comprising a reverse osmosis membrane system, an influent fitting and a nanofiltration membrane system. The reverse osmosis membrane system comprises at least one group of reverse osmosis membrane assemblies which are connected in parallel, the nanofiltration membrane system comprises at least one group of nanofiltration membrane assemblies which are connected in parallel, an influent hole of the reverse osmosis membrane system is connected with a pretreated pressurized effluent hole through a connecting fitting, an effluent hole of the reverse osmosis membrane system is connected with an influent hole of the nanofiltration membrane system through a connecting fitting, and the reverse osmosis membrane assemblies and the nanofiltration membrane assemblies are connected with reverse osmosis nanofiltration water production holes. The system of the invention also comprises a liquid cleaning inlet, an influent pressure transformer, an influent in-situ pressure gauge and a water production sampling valve. The invention has the advantages of continuous operation, water production reaching the industrial water requirement, low equipment operation pressure, low energy consumption, simple operation, convenient maintenance, high degree of automation, safe and stable operation, environmental protection, economy, and the like, fills the gap of reasonably preparing industrial water in a whole plant through wastewater treatment, wide range of applicable influent salt contents and lower investment cost compared with a nanofiltration device and an electro-adsorption device.
Description
Technical field
The present invention relates to sewage recovering system, be specifically related to a kind of waste water recycling preparation system of less energy-consumption.
Background technology
China is the with serious pollution country of shortage of water resources and water, in Eleventh Five-Year Plan, enterprise aspect the energy and resource circulation utilize, is had higher requirement.How more effectively save energy, cut down the consumption of energy, reduce wastewater discharge, will become an important factor that influences enterprise's synthesized competitiveness.Waste water recycling is the ultimate aim of wastewater treatment, is the effective means that industry energy conservation reduces discharging.
Under the overall background of energy-saving and emission-reduction policy, the waste water that some steel production enterprise will reach emission standard is by the tandem cyclically utilizing, with the utilization of service water mixed cycle or make number of ways such as pre-de-salted water, pure water and carried out a large amount of reuses, but still has following limitation:
Though 1, part waste water reaches emission standard after treatment, because of the saltiness height can not directly discharge in reuse.
2, it is little that the wastewater flow rate of producing pre-de-salted water, pure water consumption accounts for the proportion of wastewater discharge, and the recycling of waste water also all is in the simplification reuse.
3, waste water does not have desalting treatment in treating processes, in the cyclically utilizing process, owing to concentrate and the long-term enrichment of ionic, causes waste water processing station water outlet saltiness more and more higher.Reuse water supersalinity, particularly high contents of calcium and magnesium hardness, high chloride ion content easily cause pipeline, equipment scaling and corrosion in the process of reuse.
4, based on the requirement of steel industry development policies to ton steel water loss, some enterprises have influence on equipment life and quality product for reducing ton index of steel water loss with qualified discharge waste water direct reuse.
Therefore, on the mode of waste water recycling, not reuse and mixing simply is very important to the advanced treatment of waste water.
It is waste water recycling approach preferably that current waste water is made service water, and Steel Plant's whole plant waste water station water outlet saltiness will reach the water quality standard of service water about 800～2000 mg/litre, just need carry out desalting treatment.Desalter mainly contains at present: equipment such as ion-exchanger, electrodialysis (ED), electrodeionization interchanger (EDI), electro-adsorption method (EST), reverse osmosis (RO), nanofiltration (NF), distillation and multifunction electric Water Treatment device.
One, zwitterion interchanger
The zwitterion interchanger is the equipment that exchanges, reduces the water outlet saltiness by positively charged ion, negatively charged ion in positive resin anion(R.A) in the interchanger and the water, and exhausted resin recovers exchange capacity by acid-alkali regeneration.This equipment water treatment field such as is produced at water demineralization, water quality desalination, high purity water and is widely used.When the water inlet saltiness be not more than 500 mg/litre, it is economical producing pure water; When the saltiness height of waste water, though fine with this equipment effluent quality, regeneration is frequent, produces a large amount of acidic and alkaline waste waters, contaminate environment, and occupation area of equipment is big, the working cost height.So this method is not suitable for making service water.
Two, electrodialysis (ED)
Electrodialysis is to adopt ion-exchange membrane under the effect of DC electric field, and electrolytical zwitterion in the solution is had the selection perviousness, reaches the desalination purpose.The electrodialytic desalting rate is relevant with section with the level of equipment, adopts two-stage two-segment can reach ratio of desalinization 60%～70% substantially.The electrodialytic rate of recovery is about 65%, water inlet pre-treatment aspect is required lower slightly, and when water inlet saltiness during in 500～4000 mg/litre, it is feasible adopting electrodialytic technique to carry out desalination.When water inlet saltiness during in 800～1500 mg/litre, this equipment produces water can reach service water water quality, but electrodialysis power consumption height, the rate of recovery is low.Electrodialytic technique once was used widely before reverse osmosis applications.
Three, electrodeionization interchanger (EDI)
The electrodeionization exchange belongs to deep desalting, adopts ion selective membrane and ion exchange resin to be clipped between two electrodes of volts DS, and pre-de-salted water is removed the water intermediate ion through its freshwater room, and water outlet reaches the ultrapure water requirement.EDI has comprised electrodialysis and two kinds of sophisticated water treatment technologies of ion exchange resin desalination, requires the water inlet saltiness very low, is applicable to and produces ultrapure water, is not suitable for and produces service water.The electron trade ultrapure water produce with the boiler of power plant supplementary feed handle de-mineralized water produce in application wider.
Four, reverse osmosis (RO)
Reverse osmosis be utilize enough pressure to make water in the aqueous solution see through reverse osmosis membrane and with the isolating equipment of solute, reverse osmosis membrane is a core.Can select dissimilar reverse osmosis membranes according to different quality.Two sections arrangements of the general employing of conventional design for improving the rate of recovery, also can be adopted three sections arrangements in case of necessity.(specific conductivity＜90us/cm), two-pass reverse osmosis are produced pure water (specific conductivity＜10us/cm) to adopt first-stage reverse osmosis to produce pre-de-salted water mostly in steel production enterprise at present.Reverse osmosis desalination rate height, product water water quality is fine, but operation power consumption height, therefore, the whole plant waste water of saltiness 800～2000 mg/litre is not suitable for directly producing service water with reverse osmosis.The method of mixing use again with the part reuse water of not desalination after the desalination of part reuse water that adopts is also arranged at present.In waste water recycling, the reverse osmosis desalination rate is about 90%～98.5%, and the rate of recovery is about 65%～75%; When saltiness during in 2000～30000 mg/litre, it is rational adopting reverse osmosis to produce service water.Reverse osmosis has occupied consequence in water treatment desalinating process system, can be used as the pre-desalination of pure water, can produce pure water.Also be widely used in sea water desaltination at present.
Five, electro-adsorption (EST)
Electro-adsorption claims the capacitive character desalination again, is a novel water technology that late 1990s begins to rise.Referring to Fig. 1, the electro-adsorption ultimate principle is based on the electrostatic double layer theory in the electrochemistry, utilizes the characteristic of powered electrode surface charging that the water intermediate ion is carried out electrostatic adhesion.Enter the space that two battery lead plates are separated by and are formed through pretreated former water from an end, flow out from the other end.Former water is subjected to effect of electric field when flowing between cathode and anode, charged ion moves to the electrode of opposite charges respectively in the water, is adsorbed by this electrode and is stored in the electrostatic double layer.Along with increasing of electrode absorption charged particle, charged particle concentrates in the electrode surface enrichment, and final realization separates with water, makes dissolved salts, colloidal solid and charge species thereof in the water be trapped in electrode surface, obtains the water outlet of desalination.
When the electrode surface current potential reaches certain value, the electrostatic double layer ionic concn reaches hundreds and thousands of times of solution phase concentration, ion is stored in the electrostatic double layer of electrode surface under the effect of DC electric field, reaches capacity until electrode, at this moment, direct supply is removed, and with the positive and negative electrode short circuit, because the disappearance of DC electric field, the ion that is stored in the electrostatic double layer comes back in the passage, discharge with current, electrode also obtains regeneration thus.
The main electro-adsorption device of being made up of electro-adsorption film piece is to the water inlet requirement of pre-treatment water inlet requirement a little less than reverse osmosis, nanofiltration, but influent alkalinity can not be too high, every group of equipment can not move continuously, the interim discharging of dense water, and moment amount ion content reaches 5～10 times of water content into, even higher, drain time is generally 1/2～1/5 of working time, and electro-adsorption produces water conductivity and arrives big change procedure from big to small again with having working time.The device ratio of desalinization is 65%～80%, and the rate of recovery reaches 70%～80%, is applicable to that into the water saltiness adopts this equipment can reach service water water quality in 800～1500 mg/litre.Produce every cubic metre of water current consumption and be about 1.0～1.5KW.At petrochemical industry, steel wastewater reuse and electric power plant circulating water reclaiming system a spot of application is arranged at present, many application are being arranged aspect the small-sized tap water.
Six, nanofiltration (NF)
Nanofiltration be utilize certain pressure to make water in the aqueous solution see through nanofiltration membrane and with the isolating equipment of solute.Nanofiltration belongs to partial deionization, and to high valence ion decreasing ratio height, the monovalent ion decreasing ratio is low.Select the decreasing ratio difference of different sorts nanofiltration membrane for use, in waste water recycling, can adopt the overall ratio of desalinization of nanofiltration membrane 65%～80% to material.Nanofiltration is removed ability to monovalent ion (Cl-), but goes hardness obvious, and the operation power consumption is lower, and the rate of recovery generally can be controlled in 70%～80%.Nanofiltration utilizes and sea water desaltination is located many application as pre-desalter of reverse osmosis etc. at Drinking Water factory, power plant, petrochemical plant circulation sewer again.
Seven, distillation
Distillation method is a kind of ancient method, and the essence of distillation desalination process is exactly the forming process of water vapour.The distillation ratio juris is the known principle that under lab prepares distilled water.Water is burnt boiling, and fresh water is evaporated to steam, and salt is stayed the bottom of a pan, and vapor condensation is a distilled water, promptly is fresh water.This ancient a large amount of energy of method consumption produce a large amount of bird nests, are difficult to mass production fresh water.But because technology is constantly improved and developed, application multi-effect flashing steam (MSF), multistage distillation (MED) method make ancient distillation method shine the youth.Distillation method is mainly produced pure water, produces pure water in medicine, laboratory, widely applies in hot method sea water desaltination at present.The inapplicable system service water of this method.
Eight, multifunction electric Water Treatment device
Utilize electro-deposition techniques that part metals ion in the waste water is separated out by negative plate with solid-state form, thereby can reduce electrical conductivity of water and hardness.In the aqueous solution, when direct supply applies certain voltage on the two poles of the earth, promptly there is electric current to pass through, in two interpolar generation electrolysis, ionization reaction: negative plate is separated out throw out, sun level strong oxidizing property material can reduce organism in the water, ammonia nitrogen equal size, plays the effect of sterilization algae removal simultaneously.The electricity consumption of equipment amount is low, and is simple to operate, easy to maintenance.But this equipment desalination rate is low, does not reach the service water requirement.
In view of this, seek a kind of less energy-consumption waste water recycling preparation system and become pursuing one's goal of these those skilled in the art.
Summary of the invention
Task of the present invention provides a kind of less energy-consumption waste water recycling preparation system, and it has solved above-mentioned existing in prior technology shortcoming, has filled up the vacancy that whole plant waste water is rationally produced service water, and suitable water inlet saltiness scope is wide.
Technical solution of the present invention is as follows:
A kind of less energy-consumption waste water recycling preparation system, it comprises reverse osmosis membrane system, water inlet pipe fitting (4) and nanofiltration membrane system;
Described reverse osmosis membrane system is the reverse osmosis membrane assembly (6) of at least one group of parallel connection, and described nanofiltration membrane system is the nanofiltration membrane component (10) of at least one group of parallel connection;
The water-in of described reverse osmosis membrane system connects water outlet after the pre-treatment supercharging by connecting tube (4), and the water outlet of described reverse osmosis membrane system connects the water-in of nanofiltration membrane system by connecting tube (4);
Described reverse osmosis membrane assembly (6) and nanofiltration membrane component (10) all connect the reverse osmosis nanofiltration and produce the mouth of a river;
Described waste water recycling preparation system also comprises the cleaning fluid inlet that has cleaning liquid feeding side manual valve (1), is connected on the connecting tube (4) of the water-in of reverse osmosis membrane system;
Described waste water recycling preparation system also comprises intake pressure transmitter (2) and the tensimeter (3) on the spot of intaking, and is connected on the connecting tube (4) of the water-in of reverse osmosis membrane system;
Described waste water recycling preparation system also comprises product water sampling valve (8), is arranged on reverse osmosis membrane assembly (6), nanofiltration membrane component (10) to the connecting tube (4) between the reverse osmosis nanofiltration product mouth of a river.
The outside of described reverse osmosis membrane assembly (6) is provided with pressure vessel for reverse osmosis (5).
The outside of described nanofiltration membrane component (10) is provided with nanofiltration putamina (9).
Described less energy-consumption waste water recycling preparation system also comprises intersegmental tensimeter on the spot (7), is arranged on the connecting tube (4) between reverse osmosis membrane system and the nanofiltration membrane system.
Described less energy-consumption waste water recycling preparation system also comprises product water tensimeter (11), product water rupture disk (12), product water conductivity table (13), product water flowmeter (14), product water end (W.E.) manual valve (15), product Water Check Valve (16), the product total sampling valve of water (17) and product water side self-draining valve (18) on the spot, is separately positioned on reverse osmosis membrane assembly (6), nanofiltration membrane component (10) to the connecting tube (4) between the reverse osmosis nanofiltration product mouth of a river.
Described less energy-consumption waste water recycling preparation system also comprises dense water tensimeter (19), concentrated stream amount detection valve (20), dense water side self-draining valve (21), dense water end (W.E.) manual modulation valve (22), dense Water Check Valve (23), the moving trip valve (24) of dense sailor and dense pipe fitting (25) on the spot, is separately positioned on the water outlet of nanofiltration membrane component (10).
The present invention makes it compared with prior art owing to adopted above technical scheme, and this less energy-consumption waste water recycling preparation system utilizes reverse osmosis membrane to select the different characteristics of perviousness reasonably to combine with nanofiltration membrane to ionic, and has following advantage:
1, native system has been filled up the vacancy that whole plant waste water is rationally produced service water, and suitable water inlet saltiness scope is wide.
2, the native system operating pressure is low, so operation energy consumption is low.
3, the native system cost of investment is a little less than nanofiltration and electro-adsorption device.
4, full factory production waste water has the temperature slightly higher than natural water, when using native system in waste water recycling is handled, has avoided the shortcoming that energy consumption is big at low temperatures, producing water ratio is low.This advantage is particularly evident in the winter time.
Description of drawings
Fig. 1 is the electro-adsorption process principle figure of prior art.
Fig. 2 is the syndeton synoptic diagram of a kind of less energy-consumption waste water recycling preparation system of the present invention.
Reference numeral:
1 for cleaning the liquid feeding side manual valve, and 2 is the intake pressure transmitter, and 3 for intaking tensimeter on the spot, 4 is connecting tube, 5 is pressure vessel for reverse osmosis, and 6 is reverse osmosis membrane assembly, and 7 is intersegmental tensimeter on the spot, 8 are each product water sampling valve, 9 are the nanofiltration putamina, and 10 is nanofiltration membrane component, and 11 for producing water tensimeter on the spot, 12 for producing the water rupture disk, 13 for producing the water conductivity table, and 14 for producing water flowmeter, and 15 for producing the water end (W.E.) manual valve, 16 for producing Water Check Valve, 17 for producing the total sampling valve of water, and 18 for producing water side self-draining valve, and 19 is dense water tensimeter on the spot, 20 are concentrated stream amount detection valve, 21 is dense water side self-draining valve, and 22 is dense water end (W.E.) manual modulation valve, and 23 is dense Water Check Valve, 24 is the moving trip valve of dense sailor, and 25 is dense pipe fitting.
Embodiment
Below in conjunction with drawings and Examples the present invention is elaborated.
Referring to Fig. 2, the invention provides a kind of less energy-consumption waste water recycling preparation system, by cleaning liquid feeding side manual valve 1, intake pressure transmitter 2, the tensimeter 3 on the spot of intaking, connecting tube 4, pressure vessel for reverse osmosis 5, reverse osmosis membrane assembly 6, intersegmental tensimeter on the spot 7, produce water sampling valve 8, nanofiltration putamina 9, nanofiltration membrane component 10, produce water tensimeter 11 on the spot, produce water rupture disk 12, produce water conductivity table 13, produce water flowmeter 14, produce water end (W.E.) manual valve 15, produce Water Check Valve 16, produce the total sampling valve 17 of water, produce water side self-draining valve 18, dense water is tensimeter 19 on the spot, the concentrated stream amount detects valve 20, dense water side self-draining valve 21, dense water end (W.E.) manual modulation valve 22, dense Water Check Valve 23, moving trip valve 24 of dense sailor and dense pipe fitting 25 are formed.
Wherein, reverse osmosis membrane system is the reverse osmosis membrane assembly 6 of at least one group of parallel connection, and the nanofiltration membrane system is the nanofiltration membrane component 10 of at least one group of parallel connection.The water-in of reverse osmosis membrane system connects water outlet after the pre-treatment superchargings by connecting tube 4, and the dense water water outlet of reverse osmosis membrane system connects the water-in of nanofiltration membrane systems by connecting tube 4.Reverse osmosis membrane assembly 6 and nanofiltration membrane component 10 all connect the reverse osmosis nanofiltration and produce the mouth of a river.
The outer setting pressure vessel for reverse osmosis 5 of reverse osmosis membrane assembly 6, the outer setting nanofiltration putamina 9 of nanofiltration membrane component 10.Have on the connecting tube 4 of water-in that the cleaning fluid inlet that cleans liquid feeding side manual valve 1 is connected reverse osmosis membrane system.Intake pressure transmitter 2 and the tensimeter 3 on the spot of intaking are connected on the connecting tube 4 of water-in of reverse osmosis membrane system.Intersegmental tensimeter on the spot 7 is arranged on the connecting tube 4 between reverse osmosis membrane system and the nanofiltration membrane system.
Produce water sampling valve 8 and be arranged on reverse osmosis membrane assembly 6, nanofiltration membrane component 10 to the connecting tube 4 between the reverse osmosis nanofiltration product mouth of a river.Product water tensimeter 11, product water rupture disk 12, product water conductivity table 13, product water flowmeter 14, product water end (W.E.) manual valve 15, product Water Check Valve 16, the product total sampling valve 17 of water and product water side self-draining valve 18 on the spot is separately positioned on reverse osmosis membrane assembly 6, nanofiltration membrane component 10 to the connecting tube 4 between the reverse osmosis nanofiltration product mouth of a river.
Dense water tensimeter 19, concentrated stream amount on the spot detects the water outlet that valve 20, dense water side self-draining valve 21, dense water end (W.E.) manual modulation valve 22, dense Water Check Valve 23, the moving trip valve 24 of dense sailor and dense pipe fitting 25 are separately positioned on nanofiltration membrane component 10.
In actual the use, in different areas, different water intaking approach, its service water water source saltiness is discrepant.And the difference of Steel Plant's technology, cause the kind of waste water of collection also to have bigger difference, its saltiness can be different, but basic saltiness is between 800～2000 mg/litre.
The present technique product characteristics is:
(1) this product is made up of putamina, reverse osmosis membrane assembly, nanofiltration membrane group valency, frame, pipe fitting, valve, under meter, pressure warning unit, electrical conductivity meter, local operation case, concentrated sampling cabinet and rupture disk etc., and all parts can be assembled on the frame.
(2) core of present technique product is the reasonable combination of reverse osmosis membrane and nanofiltration membrane, equipment is made up of two sections (or three sections), one section is adopted reverse osmosis membrane assembly, two sections (or three sections) adopt nanofiltration membrane component, the pre-treatment qualified discharge waste water of process topping-up pump supercharging is by being equipped with the putamina of reverse osmosis membrane, dense water enters two sections that nanofiltration membrane is housed, and one section and two sections is produced the water remittance and enters industrial pond, the dense water qualified discharge that nanofiltration produces together.
(3) the present technique product allows the CL in the waste water
-, HCO
3 -, F
-, NH
4 +, Na
+, K
+Enter in right amount in the product water Deng monovalent ion; Two sections reverse osmosiss make nearly all ion concentrate in dense water, have only the minute quantity ion to enter product water; And two sections nanofiltrations make the CL of a great deal of
-, F
-, NH
4 +Ion enters product water.
(4) the whole ratio of desalinization of present technique product is about 80%～90%, the rate of recovery 70%～80%.
(5) about 200～400 mg/litre of product water saltiness of present technique product reach the process water water quality requirement.
(6) present technique product operating pressure is low, and power consumption is about 2/3 of reverse osmosis operation power consumption.
To sum up, the present technique product have continuously-running, produce that water reaches the service water requirement, the equipment operating pressure is low, energy consumption is low, simple to operate, easy to maintenance, level of automation is high, operating safety, stable, environmental protection, economic dispatch advantage.
The effect of present technique product: present technique product system water water quality is better than the saltiness of the industrial fresh water water quality regulation of iron and steel enterprise's water supply quality standard (reference), is lower than the saltiness of the industrial fresh water of producing with underground water II class water source.The present technique product is one section and adopts reverse osmosis membrane, two sections technical process and equipment that adopt nanofiltration membrane or two, three sections employing nanofiltration membrane.The present technique application range of products is that the waste water recycling that saltiness is not more than 2000 mg/litre prepares in service water.
Certainly, those skilled in the art in the present technique field will be appreciated that, the foregoing description only is to be used for illustrating the present invention, and be not as limitation of the invention, as long as in connotation scope of the present invention, all will drop in the scope of claim of the present invention the variation of the foregoing description, modification etc.
Claims (6)
1. less energy-consumption waste water recycling preparation system, it is characterized in that: it comprises reverse osmosis membrane system, water inlet pipe fitting (4) and nanofiltration membrane system;
Described reverse osmosis membrane system is the reverse osmosis membrane assembly (6) of at least one group of parallel connection, and described nanofiltration membrane system is the nanofiltration membrane component (10) of at least one group of parallel connection;
The water-in of described reverse osmosis membrane system connects water outlet after the pre-treatment supercharging by connecting tube (4), and the water outlet of described reverse osmosis membrane system connects the water-in of nanofiltration membrane system by connecting tube (4);
Described reverse osmosis membrane assembly (6) and nanofiltration membrane component (10) all connect the reverse osmosis nanofiltration and produce the mouth of a river;
Described waste water recycling preparation system also comprises the cleaning fluid inlet that has cleaning liquid feeding side manual valve (1), is connected on the connecting tube (4) of the water-in of reverse osmosis membrane system;
Described waste water recycling preparation system also comprises intake pressure transmitter (2) and the tensimeter (3) on the spot of intaking, and is connected on the connecting tube (4) of the water-in of reverse osmosis membrane system;
Described waste water recycling preparation system also comprises product water sampling valve (8), is arranged on reverse osmosis membrane assembly (6), nanofiltration membrane component (10) to the connecting tube (4) between the reverse osmosis nanofiltration product mouth of a river.
2. less energy-consumption waste water recycling preparation system as claimed in claim 1 is characterized in that: the outside of described reverse osmosis membrane assembly (6) is provided with pressure vessel for reverse osmosis (5).
3. less energy-consumption waste water recycling preparation system as claimed in claim 1 is characterized in that: the outside of described nanofiltration membrane component (10) is provided with nanofiltration putamina (9).
4. less energy-consumption waste water recycling preparation system as claimed in claim 1 is characterized in that: it also comprises intersegmental tensimeter on the spot (7), is arranged on the connecting tube (4) between reverse osmosis membrane system and the nanofiltration membrane system.
5. less energy-consumption waste water recycling preparation system as claimed in claim 1, it is characterized in that: it also comprises product water tensimeter (11), product water rupture disk (12), product water conductivity table (13), product water flowmeter (14), product water end (W.E.) manual valve (15), product Water Check Valve (16), the product total sampling valve of water (17) and product water side self-draining valve (18) on the spot, is separately positioned on reverse osmosis membrane assembly (6), nanofiltration membrane component (10) to the connecting tube (4) between the reverse osmosis nanofiltration product mouth of a river.
6. less energy-consumption waste water recycling preparation system as claimed in claim 1, it is characterized in that: it also comprises dense water tensimeter (19), concentrated stream amount detection valve (20), dense water side self-draining valve (21), dense water end (W.E.) manual modulation valve (22), dense Water Check Valve (23), the moving trip valve (24) of dense sailor and dense pipe fitting (25) on the spot, is separately positioned on the water outlet of nanofiltration membrane component (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010265113 CN101935111B (en) | 2010-08-26 | 2010-08-26 | Wastewater recycling preparation system with low energy consumption |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010265113 CN101935111B (en) | 2010-08-26 | 2010-08-26 | Wastewater recycling preparation system with low energy consumption |
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| CN101935111A true CN101935111A (en) | 2011-01-05 |
| CN101935111B CN101935111B (en) | 2012-12-19 |
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| CN 201010265113 Expired - Fee Related CN101935111B (en) | 2010-08-26 | 2010-08-26 | Wastewater recycling preparation system with low energy consumption |
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| WO2017181696A1 (en) * | 2016-04-21 | 2017-10-26 | 广州市心德实业有限公司 | Method for treating and recycling brine wastewater containing sodium chloride and sodium sulfate |
| CN109092182A (en) * | 2017-06-21 | 2018-12-28 | 宝钢工程技术集团有限公司 | Lime stone mud cake returns the device and its application method of Commercial cultivation |
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| WO2017181696A1 (en) * | 2016-04-21 | 2017-10-26 | 广州市心德实业有限公司 | Method for treating and recycling brine wastewater containing sodium chloride and sodium sulfate |
| CN109092182A (en) * | 2017-06-21 | 2018-12-28 | 宝钢工程技术集团有限公司 | Lime stone mud cake returns the device and its application method of Commercial cultivation |
| CN112939150A (en) * | 2020-09-11 | 2021-06-11 | 南京中电环保水务有限公司 | Full-automatic high-recovery-rate salt separation integrated system and method |
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