CN106746049A - A kind of ultrapure water production system and its production method - Google Patents
A kind of ultrapure water production system and its production method Download PDFInfo
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- CN106746049A CN106746049A CN201611197028.4A CN201611197028A CN106746049A CN 106746049 A CN106746049 A CN 106746049A CN 201611197028 A CN201611197028 A CN 201611197028A CN 106746049 A CN106746049 A CN 106746049A
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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
-
- 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
- C02F1/008—Control or steering systems not provided for elsewhere in subclass C02F
-
- 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
- C02F1/28—Treatment of water, waste water, or sewage by sorption
- C02F1/283—Treatment of water, waste water, or sewage by sorption using coal, charred products, or inorganic mixtures containing them
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
- C02F1/441—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by reverse osmosis
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
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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
- 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
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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
- C02F2303/00—Specific treatment goals
- C02F2303/16—Regeneration of sorbents, filters
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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
- C02F5/00—Softening water; Preventing scale; Adding scale preventatives or scale removers to water, e.g. adding sequestering agents
Abstract
Primary improvements of the invention for a kind of ultrapure water producing method and a) by pretreated raw water by filtering for the first time；The first time filtering uses cartridge filter；B) raw water after the first time is filtered carries out osmosis filtration；C) pure water after the osmosis filtration is carried out into electrodeionization treatment；D) fresh water after electrodeionization treatment is carried out into Resistivity testing, and is compared with preset value, ultra-pure water is obtained if up to standard；Repeat step c) if not up to standard.The ultrapure water producing method that the present invention is provided, detection project is few, and ultrapure water production efficiency is high, present invention also offers a kind of corresponding ultrapure water production system.
Description
Technical field
The present invention relates to a kind of field of water treatment equipment, and in particular to a kind of ultrapure water production system and its production method.
Background technology
Ultra-pure water, is water that resistivity reaches 18M Ω * cm (25 DEG C).It is usually used in being used for semiconductor in integrated circuit industry
Steam in the cleaning of raw material and vessel used, the preparation of lay photoetching mask plate and silicon chip or some chemical industry preparation process
Source etc..
Urea for vehicle is an essential reagent in diesel vehicle tail gas processor, in the mixture and system of urea for vehicle
During standby, it is necessary to use ultra-pure water, because containing substantial amounts of metal ion and chloride in general water, can influence at tail gas
The sensitivity for managing the inductor probe of device even results in the damage of equipment.
Prepare ultra-pure water in the prior art generally all can carry out Multi-channel filtering by raw water, and detect the water after per pass filtering
The parameters such as ion concentration, resistivity, electrical conductivity, cause that parts that device includes and mechanism are excessive, and volume is excessively huge, unfavorable
In the miniaturization of product.
The content of the invention
In view of this, to provide a kind of detection project few for the present invention, ultrapure water production efficiency ultrapure water producing method high and
System.
To solve above technical problem, the technical scheme is that using a kind of ultrapure water producing method, it includes：
A) by pretreated raw water by filtering for the first time；The first time filtering uses cartridge filter；
B) raw water after the first time is filtered carries out osmosis filtration；
C) pure water after the osmosis filtration is carried out into electrodeionization treatment；
D) fresh water after electrodeionization treatment is carried out into Resistivity testing, and is compared with preset value, if up to standard
To ultra-pure water；Repeat step c) if not up to standard.
Preferably, the pretreatment is specially：
By raw water by carrying out a times filtering, the b times filtering and the c times filtering after removal of impurities respectively；To institute after the completion of filtering
The equipment for stating a times filtering, the b times filtering and the c times filtering carries out backwash operation.
Preferably, it is filtered into multi-medium filtering for described a times, is filtered into adsorbing medium filtering for the b times；It is filtered into for the c times
Soften.
Preferably, the multi-medium filtering is quartz sand filtration；The adsorbing medium is filtered into activated carbon filtering.
Preferably, the c times filtering uses water-softening plant, and also includes that salt box is used to that after softening kalium ion and natrium ion will to be contained
Salt solution be pumped into the water-softening plant, the medium in the water-softening plant is regenerated.
Preferably, the pure water after the osmosis filtration is carried out into electrodeionization treatment to be specially：
Pure water after osmosis filtration is carried out into electrical conductivity detection；
Detect that the pure water after electrical conductivity carries out electrodeionization treatment, be divided into concentrated water, pole water and fresh water；
The concentrated water and pole water carry out wastewater treatment；
Fresh water carries out step d) operations.
Present invention also offers a kind of ultrapure water production system, including：
Pretreatment system, for being pre-processed to raw water；
Safety filter system, including cartridge filter and several high-pressure pumps；For entering to the pretreated raw water
Row is filtered for the first time；
Reverse osmosis filtration system, including several and the one-to-one reverse osmosis membrane assembly of several high-pressure pumps, use
Pure water after being filtered to first time carries out osmosis filtration operation；
Electrodeionization system, including electric deionizing device, for for carrying out electric desalination operation；
Detecting system, at least including conductivity meter, resistivity meter, for detect pure water and electricity after osmosis filtration go from
Resistivity after child-operation；
Control system, including central processing unit and detection electrical conductivity and the sensor of resistivity, the sensor will be detected
Signal transmission compares numerical value with preset value to the central processing unit, the central processing unit, is repeated if mismatching
Corresponding filter operation.
Preferably, the pretreatment system includes：Raw water pump, for raw water to be pumped in filter mechanism；
The first filter mechanism, the second filter mechanism and the 3rd filter mechanism being sequentially connected by pipeline；
First filter mechanism, the second filter mechanism and in the 3rd filter mechanism one or more filter mechanisms top
It is provided with back purge system.
Preferably, the pretreatment system also includes discharge of wastewater pipeline, one end and first filter mechanism, the second mistake
The top connection of one or more filter mechanisms in filter structure, the 3rd filter mechanism, the other end is connected with wastewater collection discharge
Device.
Preferably, first filter mechanism is quartz filter；Second filter mechanism is active carbon filter；
3rd filter mechanism is demineralizer.
The invention provides a kind of preparation method of ultra-pure water, including it is included a) by pretreated raw water by first
Secondary filtering；The first time filtering uses cartridge filter；B) raw water after the first time is filtered carries out osmosis filtration；
C) pure water after the osmosis filtration is carried out into electrodeionization treatment；D) fresh water after electrodeionization treatment is carried out into electricity
Resistance rate is detected, and is compared with preset value, and ultra-pure water is obtained if up to standard；Repeat step c) if not up to standard.The present invention is carried
After the ultrapure water producing method for supplying is pre-processed to raw water first, water carries out first time filtering into cartridge filter, passes through
It is fine particles more than 1FTU degree that cartridge filter removes wherein turbidity.Multiple counter-infiltrations and electrodeionization are used simultaneously
(EDI) share, the most of organic matter and inorganic matter in water can be removed, enable water to reach ultrapure water quality standard.And due to
The ultrapure water production system that the present invention is provided is preferred in the urea production equipment of miniaturization, it is necessary to more compact and small body type
Equipment.So needs are detected and control alleviation will be lacked as far as possible, due to above-mentioned cartridge filter, reverse osmosis unit, EDI modules
Raw water is processed according to processing sequence with pretreatment module, the standard of ultra-pure water can be reached, only in ultrapure water out
Place sets Resistivity testing can just meet the detection of ultra-pure water, save cost, and production efficiency is high.
Present invention also offers a kind of corresponding ultrapure water production system, pretreatment system, for carrying out pre- place to raw water
Reason；Safety filter system, including cartridge filter and several high-pressure pumps；For carrying out first to the pretreated raw water
Secondary filtering；Reverse osmosis filtration system, including several and the one-to-one reverse osmosis membrane assembly of several high-pressure pumps, are used for
Pure water after being filtered to first time carries out osmosis filtration operation；Electrodeionization system, including electric deionizing device, for carrying out electricity
Desalination is operated；Detecting system, at least including conductivity meter, resistivity meter, for detecting that pure water and electricity after osmosis filtration go
Resistivity after ion manipulation；Control system, including central processing unit and detection electrical conductivity and resistivity sensor, the biography
Detection signal is transferred to the central processing unit by sensor.The central processing unit compares numerical value with preset value, if not
Matching then illustrates that water treatment facilities are faulty should discharge in time.The ultrapure water production system that the present invention is provided is by filtering system of ensuring public security
The back purge system set in system, pretreatment system, and only include that a conductivity meter and resistance instrument are to ensure that finally
Ultra-pure water meet standard, whether a control final result meets ultra-pure water requirement, if not being inconsistent standardization if carry out again
Where on-call maintenance is filtering, or investigation problem occur.
Brief description of the drawings
The ultra-pure water flow sheet that Fig. 1 one embodiment of the invention is provided；
The front view schematic diagram of the ultrapure water production system that Fig. 2 one embodiment of the invention is provided；
The side view schematic diagram of the ultrapure water production system that Fig. 3 one embodiment of the invention is provided；
The structural representation of the ultrapure water pretreatment module shown in Fig. 4 one embodiment of the invention；
Fig. 5 is the ultrapure water production system and pretreatment module connection diagram shown in one embodiment of the invention.
Specific embodiment
In order that those skilled in the art more fully understands technical scheme, with reference to specific embodiment
The present invention is described in further detail.
The invention provides a kind of ultrapure water producing method as shown in figure 1, comprising the following steps：
A) by pretreated raw water by filtering for the first time；The first time filtering uses cartridge filter；
B) raw water after the first time is filtered carries out osmosis filtration；
C) pure water after the osmosis filtration is carried out into electrodeionization treatment；
D) fresh water after electrodeionization treatment is carried out into Resistivity testing, and is compared with preset value, if up to standard
To ultra-pure water；Repeat step c) if not up to standard.
In order that the ultra-pure water that the present invention is provided does not need Multi-channel detection, it is necessary to ensure that raw water is being entered after first time filters
Most impurity, not tolerant, bulky grain etc. have been removed before entering cartridge filter influences the material of water degree of purity.So this
Invention preferably by raw water by carrying out a times filtering, the b times filtering and the c times filtering respectively after removal of impurities；The removal of impurities preferably makes
With conventional milipore filter ultrafiltration, the milipore filter preferably uses the milipore filter that aperture is 0.005~0.01 μm.Due to a,
B, c filtering are continuous filterings, and preferably use be the filter of continuous closing, so having many filter residues residuals in filtering
In the filter medium of filter, in order to extend the service life of filter, the present invention is preferably right after the completion of a, b, c filtering
The equipment of a times filtering, the b times filtering and the c times filtering carries out backwash operation.Waste water after backwash operation enters
Waste Water Treatment.
In order that pretreating effect is more preferably, the present invention is filtered into multi-medium filtering, is filtered into for the b times for preferably described a times
Adsorbing medium is filtered；It is filtered into softening for the c times.It is furthermore preferred that the multi-medium filtering is quartz sand filtration；The adsorbing medium
It is filtered into activated carbon filtering.The c times filtering uses water-softening plant, and also include salt box be used to containing after softening potassium sodium from
The salt solution of son is pumped into the water-softening plant, and the medium in the water-softening plant is regenerated.
First time filtering is carried out to pretreated raw water first by cartridge filter in the present invention.Cartridge filter
Can remove after the pretreatment that turbidity is the particle of more than 1FTU in water.By most solid granulates and liquid macromolecular complex
Matter is removed.By first time filter after, also exist in the raw water turbidity less than 1FTU particulate matter and/or metal ion and/
Or organic, electrodeless particle.Need to carry out it further clear.The present invention uses osmosis filtration.According to the present invention, due to
Filtering for the first time uses cartridge filter, it is advantageous to be needed the original after first time filtering before the osmosis filtration
Osmosis filtration is carried out after water pressurization, this damage for also having resulted in reverse osmosis module is accelerated, so present invention preferably uses many
Road reverse osmosis module in parallel is filtered, it is also possible to while osmosis filtration is carried out, to share pressure, it is also possible to partly carry out
Counter-infiltration is operated, and so can use another part after a part is damaged.
After having carried out osmosis filtration, electrodeionization operation is carried out to the pure water after the counter-infiltration, it is preferred that also need to
The detection of electrical conductivity is carried out before the power taking ion manipulation, and the conductivity data is fed back into central processing unit, passed through
Central processing unit control EDI (electrodeionization module) carries out time and the degree of electrodeionization operation, the electrodeionization treatment
Pure water afterwards is divided into concentrated water, pole water and fresh water, and the fresh water after the deionization is carried out into Resistivity testing, if meet less than etc.
The standard of ultra-pure water has then been reached in 13M Ω * cm (25 DEG C).
Present invention also offers a kind of ultrapure water production system, including：
Pretreatment system, for being pre-processed to raw water；
Safety filter system, including cartridge filter and several high-pressure pumps；For entering to the pretreated raw water
Row is filtered for the first time；
Reverse osmosis filtration system, including several and the one-to-one reverse osmosis membrane assembly of several high-pressure pumps, use
Pure water after being filtered to first time carries out osmosis filtration operation；
Electrodeionization system, including electric deionizing device, for for carrying out electric desalination operation；
Detecting system, at least including conductivity meter, resistivity meter, for detect pure water and electricity after osmosis filtration go from
Resistivity after child-operation；
Control system, including central processing unit and detection electrical conductivity and the sensor of resistivity, the sensor will be detected
Signal transmission compares numerical value with preset value to the central processing unit, the central processing unit, is repeated if mismatching
Corresponding filter operation.
As shown in figure 1, the ultrapure water production system includes in specific one embodiment wherein：Cartridge filter
A1FTU, high-pressure pump A2, reverse osmosis unit A3, cartridge filter water inlet A5, instrument box A6, EDI modules A 7, ultrapure water out
A8, is preferably provided with resistivity detecting device on the ultrapure water out.Present invention preferably uses resistivity sensor conduct
Resistivity data is transferred to the detection means of ultra-pure water resistivity, the resistivity sensor processing unit in instrument box,
And be displayed on the display panel of instrument box resistance instrument.
According to the present invention, the course of work of EDI, for the ion exchange resin that is filled in membrane stack can answer be divided into two
Point, a part is referred to as work and reports, and its regeneration level is relatively low, mainly plays a part of to pass to ion, and another part is referred to as polishing and states
Duty, not only plays a part of to pass to ion, but also plays a part of ion exchange, and the another boundary for planting resin is work forward position.
Work is reported and carries the task of most of ion such as removing sodium ion, chlorion, calcium ion, magnesium ion sulfate radical, and is polished
Resin then carries the task of the weak electrolytes such as removal carbonic acid, ammoniacal liquor, silicic acid.On the positive and negative electrode at two ends, chlorine can be produced
The electrode reaction product such as gas, oxygen and hydrogen, these products must take EDI out of by pole water.So in order to give full play to ion
The palingenesis of fast transferring and resin, EDI more suitable for treatment low saline salinity who, and directly produce pure water and high purity water.
Present invention additionally comprises conductivity detector, the electrical conductivity for detecting the reverse osmosis unit water outlet saliva.Inspection
Electrical conductivity is surveyed to be displayed on the display panel of the conductivity gauge of the instrument box.As shown in Fig. 2 the instrument box preferably includes conductance
Instrument A61, resistance instrument A62, pressure gauge A63 and flowmeter A64.More than it is the conventional detector in ultrapure water production device
Device.
For the treatment standard further up to ultra-pure water, pretreatment module preferably is added in ultra-pure water production process,
The pretreatment module that one embodiment of the invention is provided is as shown in figure 3, the pretreatment module includes being sequentially connected by pipeline
The first filter mechanism B1FTU, the second filter mechanism B2 and the 3rd filter mechanism B3；First filter mechanism, the second filtering
One or more filter mechanisms are provided with back purge system B5 in mechanism and the 3rd filter mechanism.Also include raw water pump B4, institute
The delivery port for stating raw water pump is connected with the water inlet of the first filter mechanism B1FTU；It is also connected with the back purge system simultaneously.
Also include discharge of wastewater pipeline, one end and the first filter mechanism B1FTU, the second filter mechanism B2, the 3rd filter mechanism B3
In one or more filter mechanisms top connection, the other end is connected with wastewater collection tapping equipment B7.First filtering
Mechanism is quartz filter；Second filter mechanism is active carbon filter；3rd filter mechanism is demineralizer.Also
Including salt box B6, the 3rd filter mechanism B3 is connected.Because B3 is demineralizer, so in order that the demineralizer can be again
Life is, it is necessary to the metal ion adsorbed in finger ring demineralizer by extracting the salt solution in salt box.
Connection is pre- before and after in another specific embodiment of the invention, ultrapure water treating device mainly includes as described in Figure 4
Processing module and ultra-pure water process units, are schematic diagram in figure, and the part ratio in figure does not have strict restriction.Wherein
Pretreatment module includes raw water pump 2, is sequentially connected in series the more medium filter 3, charcoal filter and softening filter of connection
5, ultrapure water treating module includes the cartridge filter 7, the first high-pressure pump 9, the first order reverse osmosis unit 10, second that are sequentially communicated
High-pressure pump 11, second level reverse osmosis unit 12, water pump 13 and EDI (continuous electric desalination) module.Described more medium filter 3,
Active carbon filter 4 and softening filter 5 are described to automatically control first 18 to adopt on the market using first 18 control is automatically controlled
Purchase, more medium filter of the invention 3 and charcoal filter are using the new full-automatic F71F67 type strainer valves of profit, softening filter
5 using the new full-automatic F65 type time flow softener valves of profit.More medium filter 3 and active carbon filter 4 are respectively equipped with flush pipe
Road (not shown) automatically controls first 18 and connects with described, and coming for both forward and reverse directions is capable of achieving in the case where first 18 control is automatically controlled
Backwash and wash.The softening filter 5 is connected with salt box 6, and being pumped into salt solution from salt box 6 in the case where first 18 control is automatically controlled makes softening
Filter 5 is regenerated.
According to embodiment, the first order reverse osmosis unit 10 of the ultrapure water treating module is two reverse osmosis membranes of parallel connection
Component, the water into first order reverse osmosis unit 10 is divided into two simultaneously into two reverse osmosis membrane assemblies again while anti-from two
Flow out to merge in permeable membrane element and flow into second level reverse osmosis unit 12.Second level reverse osmosis unit 12 is a reverse osmosis membrane group
Part.The first high-pressure pump 9 is provided with after cartridge filter 7 before first order reverse osmosis membrane assembly, the reverse osmosis unit 12 in the second level
Before be provided with the second high-pressure pump 11, first high-pressure pump 9 is that first order reverse osmosis unit 10 provides the necessary hydraulic pressure of work, described
Second high-pressure pump 11 is that second level reverse osmosis unit 12 provides the necessary hydraulic pressure of work.Connect after the second level reverse osmosis unit 12
EDI modules 14 are connect, water pump 13 is provided with before EDI modules 14.The ultrapure water tank 15 of current direction after being processed through EDI stores standby.
According to the present embodiment, raw water pump 2 is connected with before described pretreatment module, for having running water area, running water
Pretreatment module is directly entered by raw water pump 2, for the not enough area of condition, raw water box 1 can be added before raw water pump 2 and is stored up
Water.The water extracted out through raw water pump 2 enters more medium filter 3, and flow direction is for from top to bottom, red more medium filter 3 is filtered
Water stay in the bottom of more medium filter 3, then be extracted into the top of active carbon filter 4 and filtered by active carbon filter 4, after filtering again
In cartridge filter 7 by the filtering ultrapure water treating module of inflow of softening filter 5.The more medium filter 3 is used as this
One embodiment of invention can be husky using quartz sand and/or manganese, and preferred top uses quartz sand, and bottom is husky using manganese, is used for
Except degranulation big impurity and iron.The active carbon filter 4 be used for it is deodorant, the softening filter 5 be used for except calcium ion and
Silicon ion, to reduce the destruction to reverse osmosis membrane.Water after pretreatment enters cartridge filter 7, is filtered through cartridge filter 7
Water afterwards enters the first high-pressure pump 9, and pressure difference switch and hand control valve are sequentially provided with towards sample tap direction on sampling line 8,
For sampling the time to determine to clean the pretreatment module.Water is pressed into first order counter-infiltration through the first high-pressure pump 9
Device 10, pressure gauge and pressure difference switch are provided between the first high-pressure pump 9 and first order reverse osmosis unit 10.Through first order reverse osmosis
Water after saturating device 10 is filtered enters the second high-pressure pump 11, along water between the high-pressure pump 11 of first order reverse osmosis unit 10 and second
Stream direction is sequentially provided with flowmeter, conductivity gauge, pressure gauge and pressure difference switch.It is anti-that the water that second high-pressure pump 11 is extruded enters the second level
Permeability apparatus 12, is provided with flowmeter, conductivity gauge and pressure difference switch after second level reverse osmosis unit 12.Filled through second level counter-infiltration
Remaining water flow back into water tank through the first return line 16 after putting 12 treatment, it is also possible to flow back into any bit in pretreatment module
Put.Current excess of imports pure water tank 15 after being processed through EDI modules 14, flow is provided with the pipeline between EDI and ultrapure water tank 15
Meter and conductivity gauge, remaining water flow back into raw water box 1 through the second return line 17 after being processed through EDI, it is also possible to flow back into pre- place
Any position in reason module.
Why first order reverse osmosis unit 10 uses two reverse osmosis membrane assemblies of parallel connection, because such as reverse osmosis above
Permeable membrane because the reason such as pressure instability, breakage, blockings or fouling is destroyed, will soon cause reverse osmosis membrane below with
EDI modules 14 are destroyed.In first order reverse osmosis unit 10 using two reverse osmosis membrane assemblies of parallel connection, main one is delayed
Punching is acted on.If on the one hand a reverse osmosis membrane assembly is broken, the electrical conductivity behind first order reverse osmosis unit 10 can be caused to occur
Change, detects, through conductivity gauge it is possible thereby to rapidly fix a breakdown；If on the other hand a reverse osmosis membrane assembly is broken, also
There is an energy normal work, very big influence will not be caused to rear production.It should be noted that the present invention uses two, this area
Technical staff can be extended as needed, using the reverse osmosis that two or more is in parallel such as in first order reverse osmosis membrane apparatus
Permeable membrane component.
The present invention is at the system failure by the first order reverse osmosis unit 10 that two counter-infiltration membrane modules of parallel connection are constituted
Reason provides a buffer time, and in handling failure, system can also be run, and thereby ensure that the stability of system.By many
Increase automatically controls first 18 and realizes itself clean on medium filter 3, active carbon filter 4 and softening filter 5, extends
The service life of pretreatment system.By setting the first return line 16 after the second reverse osmosis unit, is set after EDI modules 14
Two return lines 17, remaining water backflow improves water utilization rate after the second reverse osmosis unit and EDI modules 14 are processed.
The above is only the preferred embodiment of the present invention, it is noted that it is right that above-mentioned preferred embodiment is not construed as
Limitation of the invention, protection scope of the present invention should be defined by claim limited range.For the art
For those of ordinary skill, without departing from the spirit and scope of the present invention, some improvements and modifications can also be made, these change
Enter and retouch and also should be regarded as protection scope of the present invention.
Claims (10)
1. a kind of ultrapure water producing method, it is characterised in that including：
A) by pretreated raw water by filtering for the first time；The first time filtering uses cartridge filter；
B) raw water after the first time is filtered carries out osmosis filtration；
C) pure water after the osmosis filtration is carried out into electrodeionization treatment；
D) fresh water after electrodeionization treatment is carried out into Resistivity testing, and is compared with preset value, surpassed if up to standard
Pure water；For waste water cannot be used if not up to standard.
2. production method according to claim 1, it is characterised in that the pretreatment is specially：
By raw water by carrying out a times filtering, the b times filtering and the c times filtering after removal of impurities respectively；To described after the completion of filtering
The equipment of a filtering, the b times filtering and the c times filtering carries out backwash operation.
3. production method according to claim 2, it is characterised in that be filtered into for described a times multi-medium filtering, the b times
It is filtered into adsorbing medium filtering；It is filtered into softening for the c times.
4. production method according to claim 3, it is characterised in that the multi-medium filtering is quartz sand filtration；It is described
Adsorbing medium is filtered into activated carbon filtering.
5. production method according to claim 3, it is characterised in that the c times filtering uses water-softening plant, and also
The salt solution containing kalium ion and natrium ion is pumped into the water-softening plant after being used to soften including salt box, to Jie in the water-softening plant
Matter is regenerated.
6. production method according to claim 1, it is characterised in that the pure water after the osmosis filtration is carried out into electricity
Ion processing is specially：
Pure water after osmosis filtration is carried out into electrical conductivity detection；
Detect that the pure water after electrical conductivity carries out electrodeionization treatment, be divided into concentrated water, pole water and fresh water；
The concentrated water and pole water carry out wastewater treatment；
Fresh water carries out step d) operations.
7. a kind of ultrapure water production system, it is characterised in that including：
Pretreatment system, for being pre-processed to raw water；
Safety filter system, including cartridge filter and several high-pressure pumps；For carrying out to the pretreated raw water
Once filter；
Reverse osmosis filtration system, including several and the one-to-one reverse osmosis membrane assembly of several high-pressure pumps, for right
Pure water after filtering for the first time carries out osmosis filtration operation；
Electrodeionization system, including electric deionizing device, for carrying out electric desalination operation；
Detecting system, at least including conductivity meter, resistivity meter, for detecting the pure water after osmosis filtration and electrodeionization behaviour
Resistivity after work；
Control system, including central processing unit and detection electrical conductivity and the sensor of resistivity, the sensor are by detection signal
The central processing unit is transferred to, the central processing unit compares numerical value with preset value, repeats corresponding if mismatching
Filter operation.
8. ultrapure water production system according to claim 7, it is characterised in that the pretreatment system includes：Raw water pump,
For raw water to be pumped in filter mechanism；
The first filter mechanism, the second filter mechanism and the 3rd filter mechanism being sequentially connected by pipeline；
First filter mechanism, the second filter mechanism and the top of one or more filter mechanisms is all provided with the 3rd filter mechanism
It is equipped with back purge system.
9. ultrapure water production system according to claim 7, it is characterised in that the pretreatment system is also arranged including waste water
Put pipeline, one or more filter mechanisms in one end and first filter mechanism, the second filter mechanism, the 3rd filter mechanism
Top connection, the other end is connected with wastewater collection tapping equipment.
10. the ultrapure water treating device according to any one in claim 8 or 9, it is characterised in that first filtering
Mechanism is quartz filter；Second filter mechanism is active carbon filter；3rd filter mechanism is demineralizer.
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