CN109092065A - A kind of device and method of systemic circulation reverse osmosis process abjection low molecular weight alcohols - Google Patents
A kind of device and method of systemic circulation reverse osmosis process abjection low molecular weight alcohols Download PDFInfo
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- CN109092065A CN109092065A CN201811208061.1A CN201811208061A CN109092065A CN 109092065 A CN109092065 A CN 109092065A CN 201811208061 A CN201811208061 A CN 201811208061A CN 109092065 A CN109092065 A CN 109092065A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D61/00—Processes of separation using semi-permeable membranes, e.g. dialysis, osmosis or ultrafiltration; Apparatus, accessories or auxiliary operations specially adapted therefor
- B01D61/02—Reverse osmosis; Hyperfiltration ; Nanofiltration
- B01D61/08—Apparatus therefor
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D61/00—Processes of separation using semi-permeable membranes, e.g. dialysis, osmosis or ultrafiltration; Apparatus, accessories or auxiliary operations specially adapted therefor
- B01D61/02—Reverse osmosis; Hyperfiltration ; Nanofiltration
- B01D61/025—Reverse osmosis; Hyperfiltration
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D61/00—Processes of separation using semi-permeable membranes, e.g. dialysis, osmosis or ultrafiltration; Apparatus, accessories or auxiliary operations specially adapted therefor
- B01D61/58—Multistep processes
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- 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
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Abstract
The present invention relates to environmental protection and field of industrial production, and in particular to a kind of device and method of systemic circulation reverse osmosis process abjection low molecular weight alcohols, including a single-stage RO enriching section equipment and a multistage RO reverse osmosis equipment；Multistage RO reverse osmosis equipment includes primary cycle tank and at least three reverse osmosis units that are sequentially connected in series, primary cycle tank material enters multiple head end reverse osmosis units for being sequentially connected in series reverse osmosis units by level-one high-pressure pump, from the discharge of the reverse osmosis units of tail end to go out system permeate, the high-pressure pump of pans and conveying material is provided between adjacent reverse osmosis units.The present invention deviates from low molecular weight alcohols in all kinds of aqueous solutions for reverse osmosis membrane (RO) dope full circulation operation technique, and reverse osmosis (RO) permeate low molecule alcohol levels are lower than 30ppm, is in domestic and international top standard.
Description
Technical field
The present invention relates to environmental protection and field of industrial production, further to reverse osmosis field, in particular to a kind of systemic circulation
The device and method of reverse osmosis process abjection low molecular weight alcohols.
Background technique
Reverse osmosis also known as reverse osmosis is one kind using pressure difference as motive force, and the UF membrane behaviour of solvent is isolated from solution
Make.Pressure is applied to the feed liquid of film side, when pressure is more than its osmotic pressure, solvent can be made anti-against the direction of naturally osmotic
To infiltration.To the solvent that the low-pressure side in film is penetrated, i.e. penetrating fluid；The solution that high-pressure side is concentrated, i.e. concentrate.
If being obtained fresh water with reverse osmosis treatment seawater in the low-pressure side of film, being obtained brine in high-pressure side.
Compared with other traditional separation processes, reverse osmosis separation process has its unique advantage:
(1) pressure is the active force of reverse osmosis separation process, and without the phase transformation that energy-intensive exchanges, low energy consumption；
(2) reverse osmosis not need a large amount of precipitating reagent and adsorbent, operating cost is low；
(3) reverse osmosis separation Process Design and easy to operate, the construction period is short；
(4) reverse osmosis purification efficiency is high, environmental-friendly.
Therefore, reverse osmosis technology has been widely used in life and Treatment of Industrial Water, such as seawater and brackish water desalination, doctor
It is separated with the preparation of the production of industrial water, pure water and ultrapure water, Industrial Wastewater Treatment, food processing concentration, gas.
Reverse osmosis operation process can be divided into single circulation process, Two-way Cycle (outer circulation and interior circulation) according to concentrate circulating mode
Technique；And three kinds of full circulation operation technique according to the present invention；
Single circulation process feature: the dense material of membrane module is all directly entered circulating tank and mixes with stoste (as shown in Figure 1), thus
Membrane module input concentration is reduced, film surface concentration is smaller.Pump flow size is to film surface gel or film surface resistance scouring effect
Obviously.It is suitable for material of the film to material interception rate with higher and higher concentration.The disadvantage is that internal circulating load is larger, operating cost compared with
Height, the material low for interception rate " running material " seriously, have both initial stage and later period " running material " very big feature of concentration difference.
Double-cycle process characteristic: the small part of the dense material of membrane module is directly entered circulating tank and mixes (outer circulation) with stoste, big absolutely
Part is sucked by circulating pump enters membrane module (as shown in Figure 2) in the form of circulation fluid (interior circulation).Therefore, membrane module charging is dense
Degree is very high, and film surface is dense.Pump flow size is very limited to film surface gel or film surface resistance scouring effect.Outstanding advantage
It is that the engineering energy-saving effect big for internal circulating load is obvious.It is suitable for material of the film to material interception rate with higher and low concentration.
The disadvantage is that encountering the relatively high material of concentration (permeate) the decline of membrane flux quickly, the low material of interception rate " running material " is very tight
Weight has both initial stage and later period " running material " very big feature of concentration difference.
Systemic circulation process characteristic: systemic circulation membrane process main purpose is to stablize film surface concentration to guarantee that permeate concentration is steady
It is fixed, while using the method for every grade of concentrate circulating to first order film dilution stoste supplied materials fluctuation of concentration to final system permeate out
The influence of concentration, i.e. original liquid concentration fluctuation also can guarantee greatly that permeate quality meets technique requirement very much.Its process characteristic is to production
Product quality requirements are high, it is necessary to the material filtered using the above film of two-stage, the charging using the permeate of upper level as the same level, this
Charging of the permeate of grade as next stage.The same level and subsequent dope at different levels return to upper level or first order head tank
(as shown in Figure 3).The outstanding advantage of the technique is the influence that stoste can be overcome to fluctuate to permeate quality very well；Permeate quality
Stability is fairly good；Pump flow size is quite obvious to film surface gel or film surface resistance scouring effect.It is suitable for film to material
The material of the not high and special high concentration of interception rate.The disadvantage is that complex process, concentrate circulating amount are big, energy consumption is higher.
Membrane filtration technique principle:
Using selective membrane as separating medium；
Based on mechanical grading (dissolution diffusion, Preferential adsorption Capillary Flow are theoretical)；
By applying a motive force (such as concentration difference, pressure difference, potential difference) in film two sides；
According to factors such as the size of material molecular weight, shape, conformation, electric polarities；
By the method for operation of cross-flow filtration, film is penetrated with making feed side component selection；
It realizes the separation between solid-liquid, gas-solid or molecule, achievees the purpose that separating-purifying.
Currently, the highest reverse osmosis membrane supplier toray of internationally recognized interception rate, U.S. GE, U.S. KOCH, the U.S.
DOW etc. can be retained without the reverse osmosis membrane (RO) of any model directly or using different process by low molecular weight alcohols
To 30ppm or less.
Since alcohols interception effect of the reverse osmosis membrane to low molecular weight is very poor, alcohols easily penetrates film and causes in film permeate
The alcohol content of low molecular weight is very high.Belong to concentration diffusion according to the analysis of film work principle of filter to control, and not most UF membrane skill
The precision controlling referred in art.The distinguishing feature of concentration diffusion controlled process: film surface concentration is higher, and membrane module is to low molecule alcohol
Rejection it is higher, but reach certain value when rejection, since film surface concentration is significantly promoted, be far longer than film surface because concentration mentions
The gel filtrating aid function formed is risen, when low molecule alcohol being prevented to continue to spread to film surface, permeate low molecule alcohol concentration can be big
Amplitude rises.Therefore, dope low molecule alcohol concentration rises very slow, finally can not achieve low molecule alcohol and is concentrated by film
The low molecule alcohol product of technology recycling high concentration.
Film work principle of filter analysis shows, very using single or conventional reverse osmosis technique abjection low molecule alcohol technical difficulty
Greatly.Currently, not special up to 30ppm technology below about being used to low molecule alcohol in aqueous solution using reverse osmosis technology
Benefit.Chinese patent literature application number CN201420746818.3 (publication number CN204265568U) is " at airport deicing Sewage treatment
Referring in reason device " is made using pretreatment, nanofiltration membrane, reverse osmosis membrane containing ethylene glycol/propylene glycol, thickener, soluble-salt, surface
The waste water of the substances such as activating agent, corrosion inhibiter reaches discharge standard.Clearly propose ethylene glycol or propylene glycol lower than 30ppm i.e. with
The same or higher standard of the invention patent, and foregoing invention patent cannot be reached using tradition, single reverse osmosis process
The technology of the present invention requirement: go out liquid low molecule alcohol and be lower than 30ppm, and low point of permeate can be adjusted according to the economy of entire technique
Sub- alcohols goes out liquid concentration, to achieve the purpose that be back to production or up to environmental emission standard direct emission.
Summary of the invention
Based on problem above, the present invention provides a kind of device of systemic circulation reverse osmosis process abjection low molecular weight alcohols and
Method.Low molecule alcohol a small amount of in aqueous solution removal effectively can be reached 30ppm or less, gained higher concentration low mass molecule alcohol by the present invention
Class aqueous solution carries out alcohols recycling, and filtered pure aqueous solution may return in production and use or direct emission, not only
The alcohols rate of recovery is improved, the usage amount of fresh water has been saved, production cost is reduced, the discharge amount of sewage is also reduced, to ring
Border protection and sustainable development suffer from significance, have huge economic benefit to water-deficient area.
In order to solve the above technical problems, The technical solution adopted by the invention is as follows:
A kind of device of systemic circulation reverse osmosis process abjection low molecular weight alcohols, including a single-stage RO enriching section equipment and
One multistage RO reverse osmosis equipment；
A kind of device of systemic circulation reverse osmosis process abjection low molecular weight alcohols, it is characterised in that: including a single-stage RO
Enriching section equipment and a multistage RO reverse osmosis equipment；
Single-stage RO enriching section equipment includes single-stage reverse osmosis units and enriching section circulating tank, and enriching section circulating tank discharges and list
Circulating pump is equipped between grade reverse osmosis units for being fed；
Multistage RO reverse osmosis equipment includes primary cycle tank and at least three reverse osmosis units that are sequentially connected in series, primary cycle
Tank and multiple be sequentially connected in series between reverse osmosis units are equipped with level-one for being fed high-pressure pump, are provided with centre between adjacent reverse osmosis units
The dope outlet of tank and the high-pressure pump for conveying material, multiple reverse osmosis units being sequentially connected in series is equipped with reflux pipeline, reflux pipeline
Connection type be connect with primary cycle tank, connect with upper level reverse osmosis units, is connect with the pans of the same level in or
One of three's any combination；
The purified liquor outlet of single-stage reverse osmosis units is connect with primary cycle tank feed inlet in single-stage RO enriching section equipment.
As a preferred mode, multistage RO reverse osmosis equipment is four the first-stage reverse osmosis units being sequentially connected in series, two
Grade reverse osmosis units, three-level reverse osmosis units, level Four reverse osmosis units, primary cycle tank discharge port pass through level-one high-pressure pump and one
Grade reverse osmosis units connection, the outlet of first-stage reverse osmosis unit permeate pass through level-one pans and second level high-pressure pump and second level reverse osmosis
Saturating unit connection, the outlet of two-pass reverse osmosis unit permeate pass through second level pans and three-level high-pressure pump and three-level reverse osmosis units
Connection, the outlet of three-level reverse osmosis units permeate are connect by three-level pans and level Four high-pressure pump with level Four reverse osmosis units,
The dope outlet of first-stage reverse osmosis unit, two-pass reverse osmosis unit, three-level reverse osmosis units, level Four reverse osmosis units is through return pipe
Line is back in primary cycle tank.
As a preferred mode, the dope outlet of first-stage reverse osmosis unit is connect with threeway entrance, and threeway one exports
It is connect with primary cycle tank for partial reflux by pipeline, in addition an outlet, which is connect by pipeline with enriching section circulating tank, is used for
Dope reprocessing.
As a preferred mode, single-stage reverse osmosis units dope outlet is connect with threeway entrance, and the outlet of threeway one is logical
It crosses pipeline to be connect with enriching section circulating tank for dope reprocessing, in addition an outlet connecting pipe line is discharged for dope.
As a preferred mode, the reverse osmosis membrane materials of single-stage reverse osmosis units and multi-stage reverse osmosis unit are inorganic
One of film and organic film；Structure type is one of plate membrane, rolled film, tubular membrane, hollow-fibre membrane.
As a preferred mode, single-stage reverse osmosis units and multi-stage reverse osmosis unit film separating structure are end-filtration
One of structure, cross-flow filtration structure or two kinds of filter structure any combination.
A kind of method of systemic circulation reverse osmosis process abjection low molecular weight alcohols, comprising the following steps:
Connect with multistage RO reverse osmosis equipment processing, single-stage RO enriching section of processing mode selection single-stage RO enriching section equipment is set
It is standby to be carried out one of with multistage RO reverse osmosis equipment parallel processing mode；
Single-stage RO enriching section equipment is connected processing with multistage RO reverse osmosis equipment, comprising the following steps:
Step a1: raw material is sent into enriching section circulating tank and concentrated section of high-pressure pump is sent into single-stage reverse osmosis units and is carried out
Reverse osmosis treatment, the dope of single-stage upgrading unit are partly refluxed to enriching section circulating tank and are reprocessed, and partially arrange as dope
Out；
Step b1: the permeate of step a1 is sent into multistage RO reverse osmosis equipment and is handled, permeate enters level-one and follows
Ring tank is uniformly mixed its material concentration, squeezes into multiple reverse osmosis units being sequentially connected in series after through high-pressure pump, permeate warp
Reverse osmosis membrane processing in multiple reverse osmosis units and finally from the reverse osmosis units discharge of series connection tail end to go out system permeate,
The dope of every grade of reverse osmosis units carries out reflux reprocessing, i.e. the abjection of completion low molecular weight alcohols；
Single-stage RO enriching section equipment and multistage RO reverse osmosis equipment parallel processing, comprising the following steps:
Step a2: raw material is sent into first order circulating tank, squeezes into multiple reverse osmosis lists being sequentially connected in series through high-pressure pump after
In member, the reverse osmosis units part dope of the first order is back in the enriching section circulating tank of single-stage RO enriching section equipment, enriching section
Dope is sent into single-stage reverse osmosis units by high-pressure pump, and through the reverse osmosis membrane processing in single-stage reverse osmosis units, treated
Dope discharge；Permeate is sent into primary cycle tank together with former；
Step b2: squeezing into multiple reverse osmosis units being sequentially connected in series through high-pressure pump again for the mixed stoste of step a2,
Permeate is discharged through the reverse osmosis membrane processing in multiple reverse osmosis units and finally from the reverse osmosis units of series connection tail end to go out and being
The dope of system permeate, every grade of reverse osmosis units carries out reflow treatment, i.e. the abjection of completion low molecular weight alcohols.
As a preferred mode, multiple reverse osmosis units being sequentially connected in series are at least three-level, every grade of reverse osmosis units
Dope reflux type be the centre for being back in primary cycle tank, being back in upper level reverse osmosis units, being back to the same level
In tank or one of mutual any combination of three reflux type.
As a preferred mode, low molecular weight alcohols is methanol and its derivative, ethyl alcohol, ethylene glycol in material solution
And its derivative, propyl alcohol, isopropanol, propylene glycol, glycerine and its derivative, butanol, the tert-butyl alcohol, isobutanol etc. and its derivative
Object, n-amyl alcohol etc. and its one of derivative.
As a preferred mode, the permeate of each reverse osmosis units in multiple reverse osmosis units being sequentially connected in series
Flow ratio with dope is 1:1~10:1
Compared with prior art, the beneficial effects of the present invention are:
(1) low molecule alcohol a small amount of in aqueous solution removal effectively can be reached 30ppm or less by the present invention, and gained higher concentration is low
Molecule alcohol solution carries out alcohols recycling, and filtered pure aqueous solution, which may return to, to be used in production or directly arrange
It puts, not only increases the alcohols rate of recovery, saved the usage amount of fresh water, reduce production cost, also reduce the discharge of sewage
Amount, suffers from significance to environmental protection and sustainable development, has huge economic benefit to water-deficient area；
(2) relative to traditional nanofiltration (NF) technique and reverse osmosis (RO) technique, low molecule alcohol content is with fortune in permeate
The row time linearly rises, and permeate goes out liquid low molecule alcohol after reverse osmosis membrane of the present invention (RO) full circulation operation process
Content is quite stable；
(3) present invention returns to original fluid container or upper level circulating tank using systemic circulation technique dopes at different levels, makes reverse osmosis membrane group
Part feed liquor low mass molecule alcohol concentration is stablized, and avoids conventional reverse osmosis technique film surface feed liquor concentration from constantly increasing and causes permeate low molecule
Determining alcohol rises, and be easy to cause this exceeded technical problem of discharge；
(4) present invention is suitable to film surface gel or film surface resistance scouring effect using systemic circulation process cycles pump discharge size
Apparent characteristic, the regurgitant volume for adjusting every grade of counter-infiltration dope in technique reach to adjust permeate low mass molecule alcohol concentration at different levels
To permeate low molecule alcohol concentration purposes at different levels are stablized, every grade of adjusting is relatively independent, on upper and lower influence very littles at different levels；
(5) present invention dilutes stoste using systemic circulation technique, can sufficiently overcome because of stoste low molecule alcohol fluctuation of concentration pair
The influence of system permeate low molecule alcohol concentration out；
(6) individual enriching section is specially arranged in the present invention, has both guaranteed that dope goes out liquid low molecule alcohol levels and reaches most
Height, while guaranteeing that permeate low mass molecule alcohol concentration at different levels are stablized, finally guarantee that system permeate low molecule alcohol concentration is stablized out
Be lower than this standard of 30ppm.
Detailed description of the invention
Background technique attached drawing
Fig. 1 is reverse osmosis single circulation process flow chart.
Fig. 2 is reverse osmosis double-cycle process flow chart.
Fig. 3 is reverse osmosis systemic circulation process flow chart.
Embodiment attached drawing
Fig. 4 is the schematic diagram of single-stage RO enriching section equipment.
Fig. 5 is the schematic diagram of multistage RO reverse osmosis equipment.
Fig. 6 is single-stage RO enriching section equipment and the concatenated schematic diagram of multistage RO reverse osmosis equipment.
Fig. 7 is the single-stage RO enriching section equipment schematic diagram in parallel with multistage RO reverse osmosis equipment.
Fig. 8 is series connection enriching section systemic circulation reverse osmosis process operational flow diagram.
Fig. 9 is enriching section systemic circulation reverse osmosis process operational flow diagram in parallel.
Specific embodiment
The present invention will be further described below with reference to the drawings.Embodiments of the present invention include but is not limited to following reality
Apply example.
Embodiment 1:
A kind of device of systemic circulation reverse osmosis process abjection low molecular weight alcohols, including a single-stage RO enriching section equipment and
One multistage RO reverse osmosis equipment；
Referring to fig. 4, single-stage RO enriching section equipment includes single-stage reverse osmosis units and enriching section circulating tank, enriching section circulating tank
Circulating pump is equipped between discharging and single-stage reverse osmosis units for being fed；
Referring to Fig. 5, multistage RO reverse osmosis equipment is four first-stage reverse osmosis unit, the two-pass reverse osmosis lists being sequentially connected in series
Member, three-level reverse osmosis units, level Four reverse osmosis units, primary cycle tank discharge port pass through level-one high-pressure pump and first-stage reverse osmosis list
Member connection, the outlet of first-stage reverse osmosis unit permeate are connected by level-one pans and second level high-pressure pump and two-pass reverse osmosis unit
It connecing, the outlet of two-pass reverse osmosis unit permeate is connect by second level pans and three-level high-pressure pump with three-level reverse osmosis units, and three
The outlet of grade reverse osmosis units permeate is connect by three-level pans and level Four high-pressure pump with level Four reverse osmosis units, level-one reverse osmosis
The dope outlet of saturating unit, two-pass reverse osmosis unit, three-level reverse osmosis units, level Four reverse osmosis units is back to through reflux pipeline
In primary cycle tank.
Multistage RO reverse osmosis equipment may be five and five or more the reverse osmosis units being sequentially connected in series, if raw material itself
Concentration is lower, and multistage RO reverse osmosis equipment is also possible to two or three reverse osmosis units being sequentially connected in series, and four are sequentially connected in series
Reverse osmosis units be only used as initial material (such as all kinds of waste water, evaporation equipment distillate clear water, process recycled water or ultrafiltration
(UF), nanofiltration (NF) and reverse osmosis (RO) filtering after the higher aqueous solution of permeate low molecular weight alcohols concentration) processing it is best
Mode.The dope of multiple reverse osmosis units being sequentially connected in series may be to be back in upper level reverse osmosis units, in the same level
Between in tank, in primary cycle tank or the reflux type of three's any combination.
Referring to Fig. 6, the dope outlet of first-stage reverse osmosis unit is connect with threeway entrance, and the outlet of threeway one passes through pipeline and one
Grade circulating tank connection is used for partial reflux, and in addition an outlet is connect by pipeline with enriching section circulating tank reprocesses for dope.
The outlet of single-stage reverse osmosis units dope is connect with threeway entrance, and the outlet of threeway one, which is connect by pipeline with enriching section circulating tank, to be used for
Dope reprocessing, in addition an outlet connecting pipe line is discharged for dope.
The reverse osmosis membrane materials of single-stage reverse osmosis units and multi-stage reverse osmosis unit are one of inoranic membrane and organic film；
Structure type is one of plate membrane, rolled film, tubular membrane, hollow-fibre membrane.
Single-stage reverse osmosis units and multi-stage reverse osmosis unit film separating structure be end-filtration structure, cross-flow filtration structure or
One of two kinds of filter structure any combination of person.This structure is the prior art, is no longer described in detail herein.
A kind of method of systemic circulation reverse osmosis process abjection low molecular weight alcohols, by single-stage RO enriching section equipment and multistage RO
Reverse osmosis equipment series connection processing, comprising the following steps:
Step a1: raw material is sent into enriching section circulating tank and concentrated section of high-pressure pump is sent into single-stage reverse osmosis units and is carried out
The dope partial reflux enriching section circulating tank of reverse osmosis treatment, single-stage upgrading unit is reprocessed, and is partially discharged as dope；
Step b1: the permeate of step a1 is sent into multistage RO reverse osmosis equipment and is handled, permeate enters level-one and follows
Ring tank is uniformly mixed its material concentration, squeezes into multiple reverse osmosis units being sequentially connected in series after through high-pressure pump, permeate warp
Reverse osmosis membrane processing in multiple reverse osmosis units and finally from the reverse osmosis units discharge of series connection tail end to go out system permeate,
The dope of every grade of reverse osmosis units carries out reflux reprocessing, i.e. the abjection of completion low molecular weight alcohols；
As a preferred mode, multiple reverse osmosis units being sequentially connected in series are level Four, every grade of reverse osmosis units it is dense
Liquid reflux type is to be back in primary cycle tank, be back in upper level reverse osmosis units, be back in the pans of the same level
Or one of mutual any combination of three reflux type.
As a preferred mode, low molecular weight alcohols is methanol and its derivative, ethyl alcohol, ethylene glycol in material solution
And its derivative, propyl alcohol, isopropanol, propylene glycol, glycerine and its derivative, butanol, the tert-butyl alcohol, isobutanol etc. and its derivative
Object, n-amyl alcohol etc. and its one of derivative.
As a preferred mode, the permeate of each reverse osmosis units in multiple reverse osmosis units being sequentially connected in series
Flow ratio with dope is 1:1~10:1.The ratio is also adjusted correspondingly according to the concentration of different disposal material.
Referring to Fig. 8, in this example, first order reverse osmosis units are because dope in parallel with enriching section reflux is larger thus uses
8040 reverse osmosis membranes, remaining is at different levels using 4040 film cascades.Stoste is allowed to enter single-stage RO enriching section equipment, operational process is tested
Data are as follows, and the medium-sized experimental facilities typical case operation data of enriching section systemic circulation reverse osmosis process in parallel is as follows:
Table one, the series connection medium-sized experimental data of enriching section systemic circulation reverse osmosis process
Embodiment 2:
A kind of device of systemic circulation reverse osmosis process abjection low molecular weight alcohols, including a single-stage RO enriching section equipment and
One multistage RO reverse osmosis equipment；
Referring to fig. 4, single-stage RO enriching section equipment includes single-stage reverse osmosis units and enriching section circulating tank, enriching section circulating tank
Circulating pump is equipped between discharging and single-stage reverse osmosis units for being fed；
Referring to Fig. 5, multistage RO reverse osmosis equipment is four first-stage reverse osmosis unit, the two-pass reverse osmosis lists being sequentially connected in series
Member, three-level reverse osmosis units, level Four reverse osmosis units, primary cycle tank discharge port pass through level-one high-pressure pump and first-stage reverse osmosis list
Member connection, the outlet of first-stage reverse osmosis unit permeate are connected by level-one pans and second level high-pressure pump and two-pass reverse osmosis unit
It connecing, the outlet of two-pass reverse osmosis unit permeate is connect by second level pans and three-level high-pressure pump with three-level reverse osmosis units, and three
The outlet of grade reverse osmosis units permeate is connect by three-level pans and level Four high-pressure pump with level Four reverse osmosis units, level-one reverse osmosis
The dope outlet of saturating unit, two-pass reverse osmosis unit, three-level reverse osmosis units, level Four reverse osmosis units is back to through reflux pipeline
In primary cycle tank.
Multistage RO reverse osmosis equipment may be five and five or more the reverse osmosis units being sequentially connected in series, if raw material itself
Concentration is lower, and multistage RO reverse osmosis equipment is also possible to two or three reverse osmosis units being sequentially connected in series, and four are sequentially connected in series
Reverse osmosis units be only used as initial material (such as all kinds of waste water, evaporation equipment distillate clear water, process recycled water or ultrafiltration
(UF), nanofiltration (NF) and reverse osmosis (RO) filtering after the higher aqueous solution of permeate low molecular weight alcohols concentration) processing it is best
Mode.The dope of multiple reverse osmosis units being sequentially connected in series may be to be back in upper level reverse osmosis units, in the same level
Between in tank, in primary cycle tank or the reflux type of three's any combination.
Referring to Fig. 7, the dope outlet of first-stage reverse osmosis unit is connect with threeway entrance, and the outlet of threeway one passes through pipeline and one
Grade circulating tank connection is used for partial reflux, and in addition an outlet is connect by pipeline with enriching section circulating tank reprocesses for dope.
The outlet of single-stage reverse osmosis units dope is connect with threeway entrance, and the outlet of threeway one, which is connect by pipeline with enriching section circulating tank, to be used for
Dope reprocessing, in addition an outlet connecting pipe line is discharged for dope.
The reverse osmosis membrane materials of single-stage reverse osmosis units and multi-stage reverse osmosis unit are one of inoranic membrane and organic film；
Structure type is one of plate membrane, rolled film, tubular membrane, hollow-fibre membrane.
Single-stage reverse osmosis units and multi-stage reverse osmosis unit film separating structure be end-filtration structure, cross-flow filtration structure or
One of two kinds of filter structure any combination of person.This structure is the prior art, is no longer described in detail herein.
A kind of method of systemic circulation reverse osmosis process abjection low molecular weight alcohols, by single-stage RO enriching section equipment and multistage RO
Reverse osmosis equipment series connection processing, comprising the following steps:
Step a2: raw material is sent into first order circulating tank, squeezes into multiple reverse osmosis lists being sequentially connected in series through high-pressure pump after
The reverse osmosis units part dope of member, the first order is back in the enriching section circulating tank of single-stage RO enriching section equipment, and enriching section is high
Dope is sent into single-stage reverse osmosis units by press pump, and through the reverse osmosis membrane processing in single-stage reverse osmosis units, it is dense that treated
Liquid discharge, clear liquid are sent into primary cycle tank together with stoste；
Step b2: the mixed stoste of step a2 is squeezed into multiple reverse osmosis units being sequentially connected in series through high-pressure pump again
Interior, permeate is through the reverse osmosis membrane processing in multiple reverse osmosis units and finally from the reverse osmosis units discharge of series connection tail end for out
The dope of system permeate, every grade of reverse osmosis units carries out reflow treatment, i.e. the abjection of completion low molecular weight alcohols.
As a preferred mode, multiple reverse osmosis units being sequentially connected in series are level Four, every grade of reverse osmosis units it is dense
Liquid reflux type is to be back in primary cycle tank, be back in upper level reverse osmosis units, be back in the pans of the same level
Or one of mutual any combination of three reflux type.
As a preferred mode, low molecular weight alcohols is methanol and its derivative, ethyl alcohol, ethylene glycol in material solution
And its derivative, propyl alcohol, isopropanol, propylene glycol, glycerine and its derivative, butanol, the tert-butyl alcohol, isobutanol etc. and its derivative
Object, n-amyl alcohol etc. and its one of derivative.
As a preferred mode, the permeate of each reverse osmosis units in multiple reverse osmosis units being sequentially connected in series
Flow ratio with dope is 1:1~10:1.The ratio is also adjusted correspondingly according to the concentration of different disposal material.
Referring to Fig. 9, in this example, first order reverse osmosis units are because dope in parallel with enriching section reflux is larger thus uses
8040 reverse osmosis membranes, remaining is at different levels using 4040 film cascades.Stoste is allowed to enter multistage RO reverse osmosis equipment, operational process is tested
Data are as follows, and the medium-sized experimental facilities typical case operation data of enriching section systemic circulation reverse osmosis process in parallel is as follows:
Table two, the medium-sized experimental data of enriching section systemic circulation reverse osmosis process in parallel
The experimental data of integrated embodiment 1 and embodiment 2, the present invention deviate from aqueous solution low molecule alcohol to 30ppm hereinafter,
And permeate low molecule alcohol concentration is adjusted according to the economy of entire technique, environment protection emission mark is produced or reached to reach to be back to
The purpose of quasi- direct emission.Continuously-running of the present invention 6 months or more, various functions, the performance of the invention can be reached very well.With
Low molecule alcohol containing 3000ppm is the stoste into system, forms work using the reverse osmosis series connection of level Four and enriching section series and parallel
Skill can make permeate low molecule alcohol concentration maintain 30ppm always hereinafter, minimum by separately adjustable dope reflux ratios at different levels
Content can reach 2ppm.It is there is no in the world about reverse osmosis process abjection low molecule alcohol up to 30ppm report below, therefore,
The inventive technique is advanced, process stabilizing is reliable.
It as above is the embodiment of the present invention.Design parameter in above-described embodiment and embodiment is merely to understand table
State the invention verification process of inventor, the scope of patent protection being not intended to limit the invention, scope of patent protection of the invention
Still it is subject to the claims, it is all to change with equivalent structure made by specification and accompanying drawing content of the invention, together
Reason should be included within the scope of the present invention.
Claims (10)
1. a kind of device of systemic circulation reverse osmosis process abjection low molecular weight alcohols, it is characterised in that: dense including a single-stage RO
Contracting section equipment and a multistage RO reverse osmosis equipment；
The single-stage RO enriching section equipment includes single-stage reverse osmosis units and enriching section circulating tank, the enriching section circulating tank discharging
Circulating pump is equipped between single-stage reverse osmosis units for being fed；
The multistage RO reverse osmosis equipment includes primary cycle tank and at least three reverse osmosis units that are sequentially connected in series, the level-one
Circulating tank and multiple be sequentially connected in series between reverse osmosis units are used to be fed equipped with level-one high-pressure pump, set between the adjacent reverse osmosis units
It is equipped with pans and conveys the high-pressure pump of material, the dope outlet of multiple reverse osmosis units being sequentially connected in series is equipped with return pipe
Line, the connection type of the reflux pipeline is to connect with primary cycle tank, connecting with upper level reverse osmosis units and in the same level
Between tank connection or one of three's any combination；
The permeate outlet of single-stage reverse osmosis units is connect with primary cycle tank feed inlet in the single-stage RO enriching section equipment.
2. a kind of device of systemic circulation reverse osmosis process abjection low molecular weight alcohols according to claim 1, feature exist
In: the multistage RO reverse osmosis equipment is four first-stage reverse osmosis unit, two-pass reverse osmosis unit, the three-level reverse osmosis being sequentially connected in series
Saturating unit, level Four reverse osmosis units, the primary cycle tank discharge port are connect by level-one high-pressure pump with first-stage reverse osmosis unit,
The first-stage reverse osmosis unit permeate outlet is connect by level-one pans and second level high-pressure pump with two-pass reverse osmosis unit, institute
The outlet of two-pass reverse osmosis unit permeate is stated to connect by second level pans and three-level high-pressure pump with three-level reverse osmosis units, it is described
The outlet of three-level reverse osmosis units permeate is connect by three-level pans and level Four high-pressure pump with level Four reverse osmosis units, and described one
The dope outlet of grade reverse osmosis units, two-pass reverse osmosis unit, three-level reverse osmosis units, level Four reverse osmosis units is through reflux pipeline
It is back in primary cycle tank.
3. a kind of device of systemic circulation reverse osmosis process abjection low molecular weight alcohols according to claim 2, feature exist
In: the dope of the first-stage reverse osmosis unit is exported to be connect with threeway entrance, and the outlet of threeway one is followed by pipeline and level-one
The connection of ring tank is used for partial reflux, and in addition an outlet is connect by pipeline with enriching section circulating tank reprocesses for dope.
4. a kind of device of systemic circulation reverse osmosis process abjection low molecular weight alcohols according to claim 1, feature exist
In: the single-stage reverse osmosis units dope outlet is connect with threeway entrance, and the outlet of threeway one is followed by pipeline and enriching section
The connection of ring tank is reprocessed for dope, and in addition an outlet connecting pipe line is discharged for dope.
5. a kind of device of systemic circulation reverse osmosis process abjection low molecular weight alcohols according to any one of claims 1 to 4,
It is characterized by: the reverse osmosis membrane materials of the single-stage reverse osmosis units and multi-stage reverse osmosis unit are in inoranic membrane and organic film
One kind；Structure type is one of plate membrane, rolled film, tubular membrane, hollow-fibre membrane.
6. a kind of device of systemic circulation reverse osmosis process abjection low molecular weight alcohols according to claim 5, feature exist
In: single-stage reverse osmosis units and multi-stage reverse osmosis unit film separating structure be end-filtration structure, cross-flow filtration structure or
One of two kinds of filter structure any combination of person.
7. a kind of method of systemic circulation reverse osmosis process abjection low molecular weight alcohols, which comprises the following steps:
Processing mode selection single-stage RO enriching section equipment connect with multistage RO reverse osmosis equipment processing, single-stage RO enriching section equipment and
One of multistage RO reverse osmosis equipment parallel processing mode carries out；
Single-stage RO enriching section equipment is connected processing with multistage RO reverse osmosis equipment, comprising the following steps:
Step a1: raw material is sent into enriching section circulating tank and concentrated section of high-pressure pump is sent at single-stage reverse osmosis units
Reason, the dope partial reflux enriching section circulating tank of single-stage upgrading unit are reprocessed, and are partially discharged as dope；
Step b1: the permeate that step a1 is penetrated is sent into multistage RO reverse osmosis equipment and is handled, permeate enters level-one and follows
Ring tank is uniformly mixed its material concentration, squeezes into multiple reverse osmosis units being sequentially connected in series after through high-pressure pump, permeate warp
Reverse osmosis membrane processing in multiple reverse osmosis units and finally from the reverse osmosis units discharge of series connection tail end to go out system permeate,
The dope of every grade of reverse osmosis units carries out reflux reprocessing, i.e. the abjection of completion low molecular weight alcohols；
Single-stage RO enriching section equipment and multistage RO reverse osmosis equipment parallel processing, comprising the following steps:
Step a2: sending raw material into first order circulating tank, squeeze into multiple reverse osmosis units being sequentially connected in series after through high-pressure pump,
The reverse osmosis units part dope of the first order is back in the enriching section circulating tank of single-stage RO enriching section equipment, enriching section high-pressure pump
Dope is sent into single-stage reverse osmosis units, and through the reverse osmosis membrane processing in single-stage reverse osmosis units, treated, and dope is arranged
Out, permeate is sent into primary cycle tank；
Step b2: the mixed stoste of step a2 is squeezed into multiple reverse osmosis units being sequentially connected in series through high-pressure pump again, thoroughly
It crosses liquid and is discharged through the reverse osmosis membrane processing in multiple reverse osmosis units and finally from the reverse osmosis units of series connection tail end to go out system
The dope of permeate, every grade of reverse osmosis units carries out reflow treatment, i.e. the abjection of completion low molecular weight alcohols.
8. a kind of method of systemic circulation reverse osmosis process abjection low molecular weight alcohols according to claim 7, feature exist
In: the multiple reverse osmosis units being sequentially connected in series are at least three-level, and the dope reflux type of every grade of reverse osmosis units is reflux
In to primary cycle tank, it is back in upper level reverse osmosis units, is back in the pans of the same level or three is mutually any
One of combination reflux type.
9. a kind of method of systemic circulation reverse osmosis process abjection low molecular weight alcohols according to claim 8, feature exist
In: low molecular weight alcohols is methanol and its derivative, ethyl alcohol, ethylene glycol and its derivative, propyl alcohol, isopropyl in the material solution
Alcohol, propylene glycol, glycerine and its derivative, butanol, the tert-butyl alcohol, isobutanol etc. and its derivative, n-amyl alcohol etc. and its derivative
One of.
10. according to a kind of described in any item sides of systemic circulation reverse osmosis process abjection low molecular weight alcohols of claim 7~9
Method, it is characterised in that: the permeate of each reverse osmosis units and the stream of dope in the multiple reverse osmosis units being sequentially connected in series
Amount ratio is 1:1~10:1.
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| CN110367415A (en) * | 2019-08-16 | 2019-10-25 | 章志强 | A kind of plant beverage enrichment facility and concentration process |
| CN111453812A (en) * | 2020-04-21 | 2020-07-28 | 成都民航六维航化有限责任公司 | Reverse osmosis device and method for concentrating low molecular weight alcohol-containing solution |
| CN113797758A (en) * | 2021-08-25 | 2021-12-17 | 黄山华绿园生物科技有限公司 | Plant beverage concentrating device and concentrating method thereof |
| CN114096342A (en) * | 2019-04-01 | 2022-02-25 | 盐水转换公司 | Desalination brine concentration system and method |
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