CN103127833A - Nanofiltration membrane system applied to fermented liquid purification - Google Patents
Nanofiltration membrane system applied to fermented liquid purification Download PDFInfo
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- CN103127833A CN103127833A CN2013100461501A CN201310046150A CN103127833A CN 103127833 A CN103127833 A CN 103127833A CN 2013100461501 A CN2013100461501 A CN 2013100461501A CN 201310046150 A CN201310046150 A CN 201310046150A CN 103127833 A CN103127833 A CN 103127833A
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Abstract
The invention provides a nanofiltration membrane system applied to fermented liquid purification. The nanofiltration membrane system applied to the fermented liquid purification comprises a micro-filtration membrane filtering component and a concentrate filtering component which are arranged in a front-and-back mode. The nanofiltration membrane system applied to the fermented liquid purification is characterized in that at least one nanofiltration membrane filtering component is added between the micro-filtration membrane filtering component and the concentrate filtering component in a series mode. The nanofiltration membrane filtering component comprises a first nanofiltration membrane device, a first stoste tank, a feed pump, a valve and relative pipelines. The top of the first stoste tank is provided with a fermented liquid adding port and a washing liquid adding port, and the bottom of the first stoste tank is provided with a discharge pipe port. The fermented liquid adding port is connected with a micro-filtration membrane filtering component in a previous process. The washing liquid adding port is communicated with a washing liquid washing device. The discharge pipe port of the first stoste tank is connected with a raw material inlet of the first nanofiltration membrane device through the feed pump. A trapped fluid outlet returns to the first stoste tank through a pipeline. A filtrate liquid outlet is connected with a next process. A nanofiltration technology is applied to a fermented liquid purification system, so that the purity and the effect of purification are improved.
Description
Technical field
The present invention relates to zymotic fluid purification technique field, a kind ofly specifically be applied to the NF membrane system that zymotic fluid is purified.
Background technology
According to various physical arrangement phase chemistry character, generally film can be divided into following several base class: micro-filtration MF, ultrafiltration UF, reverse osmosis (RO), nanofiltration NF, electrodialysis ED etc.
Microfiltration membranes is take differential static pressure as motive force, utilize the sieving actoion of mesh-like filter medium film to separate, micropore filtering film is uniform porous membrane, and thickness is generally between 90 ~ 150 μ m, filter particle diameter between 0.025 ~ l0 μ m, operating pressure is generally 0.01 ~ 0.1MPa.
The ultrafiltration membrance filter particle diameter is between micro-filtration and counter-infiltration, and about 5 ~ 10nm under the differential static pressure of 0.1 ~ 0.5MPa promotes, holds back protein, enzyme equimolecular quantity greater than 500 large molecule and colloid, forms concentrate, reach solution purification, separate and concentrated purpose.
Counter-infiltration is the inverse process of process of osmosis, and motive force is pressure differential, namely by adding the pressure higher than osmotic pressure in liquid one side to be separated, makes solvent in stoste be penetrated into the another side of pellicle.The operation of counter-infiltration is pressed and is generally 1 ~ 10MPa, depends primarily on former water osmotic pressure.Counter-infiltration is mainly used in desalinization, brackish water desalination, pure water production etc., relates to the industries such as municipal administration, electric power, chemical industry, medicine.
To be the eighties in 20th century develop on the multiple platform film of counter-infiltration basis NF membrane, is continuity and the development branch of ultralow pressure reverse osmosis technology.It is 0.1 ~ 1nm that NF membrane is held back particle diameter, and monovalent ion and small-molecule substance have higher transmitance, and (0.5 ~ 1MPa) is less for the operation pressure.Be mainly used in holding back multivalent ion and larger molecular organics, molecular cut off is between counter-infiltration and ultrafiltration.The numerous areas such as wastewater treatment of desalinization, pure water preparation, food industry, environmental protection have been widely used at present.
Feed liquid is by the pressurization of pump in filter process, and feed liquid flows through along the surface of filter membrane with certain flow rate, does not see through film greater than the material molecule of retaining molecular weight and flows back to batch can, sees through film less than material or the molecule of retaining molecular weight, forms dislysate.Therefore there are two outlets in the film system, the one, phegma (concentrate) outlet, another is the dislysate outlet.
It is mainly super/microfiltration membranes that at present traditional clarification separates the film that adopts, because its material diameter that can hold back has a very wide distribution, be widely used in Separation of Solid and Liquid, sized molecules material separation, remove in the technical process such as pigment, product purification, water-oil separating.
Super/microfiltration membranes is separated the technical process such as the natural subsidence that can replace in traditional handicraft, plate-frame filtering, vacuum drum, centrifuge separation, solvent extraction, resin purification, activated carbon decolorizing.
Yet there are no the NF membrane system that is applied in the chemical industry purifying technique.
Summary of the invention
In order to solve the deficiencies in the prior art, the invention provides a kind of NF membrane system that zymotic fluid is purified that is applied to, Nanofiltration-membrane technique is applied in the zymotic fluid purification system, improve purity and the effect of purifying.
The technical solution adopted for the present invention to solve the technical problems is: a kind of NF membrane system that is applied to the zymotic fluid purification, the micro-filtrate membrane filtration assembly and the thickening filtration assembly that arrange before and after comprising, it is characterized in that, in series increase at least one group of NF membrane filter assemblies between described micro-filtrate membrane filtration group and thickening filtration assembly, by the application of NF membrane, strengthen filter effect.
described NF membrane filter assemblies comprises the first nano filter membrance device, the first original fluid container, feed pump, valve and associated pipe, and described the first original fluid container top is provided with that zymotic fluid adds mouthful and cleaning fluid adds mouth, and the bottom is provided with the discharging mouth of pipe, described zymotic fluid adds the micro-filtrate membrane filtration group that mouth is connected to last operation, described cleaning fluid adds a mouthful connection cleaning fluid cleaning device, has material inlet on described the first nano filter membrance device, trapped fluid outlet and filtrate (liquid, the described first original fluid container discharging mouth of pipe is connected to the material inlet of the first nano filter membrance device by feed pump, described trapped fluid outlet turns back to the first original fluid container by pipeline, and on described trapped fluid return pipeline, the stock solution quality flowmeter is set, described stock solution quality flowmeter electrical connection regulation and control zymotic fluid adds the material inlet valve of mouth and cleaning fluid interpolation mouth, described filtrate (liquid is connected to the thickening filtration assembly of subsequent processing.
described thickening filtration assembly forms identical with the NF membrane filter assemblies, described NF membrane filter assemblies comprises the second nano filter membrance device, the second original fluid container, concentrating pump, valve and associated pipe, and add mouth at the filtrate (liquid of NF membrane filter assemblies and the trapped fluid outlet of thickening filtration assembly by the zymotic fluid that the first triple valve is connected to flush distillation pipeline and thickening filtration assembly simultaneously, and arrange on the filtrate (liquid pipeline in the first nano filter membrance device and see through the liquid mass flowmenter, be used for controlling the conversion of the first triple valve, the filtrate (liquid of described thickening filtration assembly effluxes pure water, the concentrated solution outlet of described thickening filtration assembly is connected to simultaneously the flush distillation pipeline of thickening filtration assembly by the second triple valve and the zymotic fluid of thickening filtration assembly adds mouth, and on the concentrated solution outlet pipeline in the second nano filter membrance device, the concentrate mass flowmenter is set, is used for controlling the conversion of the second triple valve.
Described zymotic fluid adds that mouth comprises that dense material adds mouthful and solvent or diluent adds mouthful, adds a mouthful outer setting cover vapor heat exchanger at described dense material, make dense material add a mouthful temperature of adding zymotic fluid be 45 spend about.
The invention has the beneficial effects as follows: adopt the concentrated advantage of purifying of Nanofiltration Membrane Separation Technology:
1), energy consumption is extremely low, saves the concentration process cost;
2), process is without chemical reaction, without phase change, do not bring other impurity into and cause the decomposition sex change of product;
3) reach, at normal temperatures concentrated purification purpose, the destruction of not causing active ingredient, the technical process yield is high;
4), can remove the salinity of product fully, reduce the product ash content, improve product purity;
5), the materials such as the acid in recyclable solution, alkali, alcohol, pigment;
6), the device structure concision and compact, floor space is little;
7), easy and simple to handle, can realize automated job, good stability, easy to maintenance.
Description of drawings
Fig. 1 is pipeline schematic diagram of the present invention;
Fig. 2 is for seeing through directly discharging pattern of liquid;
Fig. 3 is for seeing through the concentrated pattern of liquid;
Fig. 4 is concentrate discharging pattern;
Fig. 5 is that the zymotic fluid purifying technique is always schemed;
In figure: 11 first nano filter membrance devices, 12 first original fluid containers, 13 feed pumps, 14 stock solution quality flowmeters, 2 vapor heat exchangers, 3 cleaning fluid cleaning devices, 41 second nano filter membrance devices, 42 second original fluid containers, 43 concentrating pumps, 44 first triple valves, 45 see through the liquid mass flowmenter, 46 second triple valves, 47 concentrate mass flowmenters.
The specific embodiment
It is as extremely shown in Figure 5 in Fig. 1,
Nanofiltration Membrane Separation Technology often is used to replace the technical process such as freeze drying in traditional handicraft, thin film evaporation, ion-exchange demineralization, resin technique are concentrated, neutralization.The present invention is a kind of NF membrane system that is applied to the zymotic fluid purification that looks for another way, and comprises micro-filtrate membrane filtration assembly and thickening filtration assembly, in series increases at least one group of NF membrane filter assemblies between described micro-filtrate membrane filtration assembly and thickening filtration assembly.
Can carry out preliminary filtration to zymotic fluid by the micro-filtrate membrane filtration assembly, remove large granular impurity wherein, but the small molecular weight impurities such as the pigment in zymotic fluid can see through microfiltration membranes and persist in zymotic fluid, introduce NF membrane in order to remove pigment impurity wherein and filter concept, this does not have in zymotic fluid purification technique field.
The NF membrane filter assemblies comprises the first nano filter membrance device 11, the first original fluid container 12, feed pump 13, valve and associated pipe, and the first original fluid container 12 tops are provided with that zymotic fluid adds mouthful and cleaning fluid adds mouth, and the bottom is provided with the discharging mouth of pipe; Zymotic fluid interpolation mouth wherein comprises that dense material adds mouth and solvent or diluent adds mouth, one cover vapor heat exchanger 2 outside adding mouth, dense material is set, making dense material add a mouthful temperature of adding zymotic fluid is about 45 degree, zymotic fluid adds the micro-filtrate membrane filtration group that mouth is connected to last operation, accepts to come from the zymotic fluid stoste of last operation.
Above-mentioned cleaning fluid adds a mouthful connection cleaning fluid cleaning device 3, the cleaning fluid cleaning device comprises pure water tank and chemicals tank, two tanks are by pump and pipeline, consisting of CIP with micro-filtrate membrane filtration assembly, thickening filtration assembly and NF membrane filter assemblies cleans, see Fig. 5 for details, the CIP system is the abbreviation of Clean In Place, situ cleaning (on-line cleaning, cleaning on the spot).CIP cleans namely not decomposition production equipment, and the automatic purging system of available simple operations method safety, almost be introduced into all food again, and the factories such as beverage and pharmacy belong to the prior art part, no longer auspicious stating.
Have material inlet, trapped fluid outlet and filtrate (liquid on the first nano filter membrance device 11, the discharging mouth of pipe bottom the first original fluid container is connected to the material inlet of the first nano filter membrance device by feed pump 13, the trapped fluid outlet turns back to the first original fluid container 12 by pipeline, and stock solution quality flowmeter 14 is set on the trapped fluid return pipeline, stock solution quality flowmeter 14 electrical connection regulation and control zymotic fluids add the material inlet valve of mouth and cleaning fluid interpolation mouth, the keying of by-pass valve control, filtrate (liquid are connected to the thickening filtration assembly of subsequent processing.Nanofiltration is under the effect of pressure differential motive force, and salt and small-molecule substance see through NF membrane, and holds back a kind of liquid liquid separating method of macromolecular substances, claims again low pressure reverse osmosis.NF membrane molecular cut off scope is 200-1000MWCO, between ultrafiltration and counter-infiltration, is mainly used in the concentrated and purifying of macromolecular substances in solution.Nanofiltration system adopts the mode of cross-flow filtration more.The cross-flow mode has been avoided the clogging that produces in the dead-end filtration process: feed liquid the flow through surface of film, and liquid and small-molecule substance see through NF membrane under the effect of pressure, and insoluble substance and macromolecular substances are trapped; Feed liquid has material that enough flow velocitys can hold back tunicle from the film sur-face peeling, continuously peels off the pollution level that has reduced film, thereby can keep higher film permeation flux within the long time.The cross-flow process has been avoided the situation that the dependence cake layer filters in dead-end filtration (as plate and frame filter press, drum-type vacuum filter) process simultaneously, separate to occur in film surface rather than cake layer, thereby the filtrate quality is homogeneous and stable in whole process.
the thickening filtration assembly is also to adopt nanofiltration technique, described thickening filtration assembly and NF membrane filter assemblies form basic identical, focus on the annexation of pipeline, the NF membrane filter assemblies comprises the second nano filter membrance device 41, the second original fluid container 42, concentrating pump 43, valve and associated pipe, and add mouth at the filtrate (liquid of NF membrane filter assemblies and the trapped fluid outlet of thickening filtration assembly by the zymotic fluid that the first triple valve 44 is connected to flush distillation pipeline and thickening filtration assembly simultaneously, and arrange on the filtrate (liquid pipeline in the first nano filter membrance device and see through liquid mass flowmenter 45, be used for controlling the conversion of the first triple valve, the filtrate (liquid of thickening filtration assembly effluxes pure water, the concentrated solution outlet of thickening filtration assembly is connected to simultaneously the flush distillation pipeline of thickening filtration assembly by the second triple valve 46 and the zymotic fluid of thickening filtration assembly adds mouth, and on the concentrated solution outlet pipeline in the second nano filter membrance device, concentrate mass flowmenter 47 is set, is used for controlling the conversion of the second triple valve.
Have following several modes,
The one,, zymotic fluid is by after the NF membrane filter assemblies, and when seeing through the liquid mass flowmenter and concentration being detected and surpass 3.5%, the first triple valve transfers discharging to automatically to the flush distillation pipeline, and the NF membrane filter assemblies also keeps self circulation, normal operation; As Fig. 2.
The 2nd,, zymotic fluid is by after the NF membrane filter assemblies, sees through the liquid mass flowmenter and concentration detected lower than 3.5% the time, and the first triple valve transfers to automatically into the second original fluid container, sees through liquid and circulate in the thickening filtration assembly and concentrate; As Fig. 3.
The 3rd,, when concentrate mass flowmenter detectable concentration reached 3.5%, the second triple valve transferred discharging to automatically to the flush distillation pipeline, as Fig. 4.
Embodiment recited above is described the preferred embodiment of the present invention; be not that scope of the present invention is limited; design under the prerequisite of spirit not breaking away from the present invention; the relevant technical staff in the field all should expand in protection domain as determined in claims of the present invention various distortion of the present invention and improvement.
Claims (4)
1. one kind is applied to the NF membrane system that zymotic fluid is purified, and the micro-filtrate membrane filtration assembly and the thickening filtration assembly that arrange before and after comprising is characterized in that, in series increase at least one group of NF membrane filter assemblies between described micro-filtrate membrane filtration group and thickening filtration assembly.
2. a kind of NF membrane system that zymotic fluid is purified that is applied to according to claim 1, it is characterized in that, described NF membrane filter assemblies comprises the first nano filter membrance device, the first original fluid container, feed pump, valve and associated pipe, described the first original fluid container top is provided with that zymotic fluid adds mouthful and cleaning fluid adds mouth, and the bottom is provided with the discharging mouth of pipe, described zymotic fluid adds the micro-filtrate membrane filtration group that mouth is connected to last operation, described cleaning fluid adds a mouthful connection cleaning fluid cleaning device, has material inlet on described the first nano filter membrance device, trapped fluid outlet and filtrate (liquid, the described first original fluid container discharging mouth of pipe is connected to the material inlet of the first nano filter membrance device by feed pump, described trapped fluid outlet turns back to the first original fluid container by pipeline, and on described trapped fluid return pipeline, the stock solution quality flowmeter is set, described stock solution quality flowmeter electrical connection regulation and control zymotic fluid adds the material inlet valve of mouth and cleaning fluid interpolation mouth, described filtrate (liquid is connected to the thickening filtration assembly of subsequent processing.
3. a kind of NF membrane system that zymotic fluid is purified that is applied to according to claim 2, it is characterized in that, described thickening filtration assembly forms identical with the NF membrane filter assemblies, described NF membrane filter assemblies comprises the second nano filter membrance device, the second original fluid container, concentrating pump, valve and associated pipe, and add mouth at the filtrate (liquid of NF membrane filter assemblies and the trapped fluid outlet of thickening filtration assembly by the zymotic fluid that the first triple valve is connected to flush distillation pipeline and thickening filtration assembly simultaneously, and arrange on the filtrate (liquid pipeline in the first nano filter membrance device and see through the liquid mass flowmenter, be used for controlling the conversion of the first triple valve, the filtrate (liquid of described thickening filtration assembly effluxes pure water, the concentrated solution outlet of described thickening filtration assembly is connected to simultaneously the flush distillation pipeline of thickening filtration assembly by the second triple valve and the zymotic fluid of thickening filtration assembly adds mouth, and on the concentrated solution outlet pipeline in the second nano filter membrance device, the concentrate mass flowmenter is set, is used for controlling the conversion of the second triple valve.
4. a kind of NF membrane system that zymotic fluid is purified that is applied to according to claim 2, is characterized in that, described zymotic fluid adds that mouth comprises that dense material adds mouthful and solvent or diluent adds mouthful, arranging one and overlapping vapor heat exchanger outside described dense material adds mouthful.
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| CN106188189A (en) * | 2016-07-04 | 2016-12-07 | 三达膜科技（厦门）有限公司 | A kind of nucleotide mother solution desalination and concentration method |
| CN111875125A (en) * | 2020-06-30 | 2020-11-03 | 成都泓润科技有限公司 | Wastewater treatment method combining membrane separation and electrodialysis |
| CN112370971A (en) * | 2020-09-22 | 2021-02-19 | 山东大溪环保科技发展有限公司 | Separation and concentration method and separation and concentration device for food materials |
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Application publication date: 20130605 |