CN101653700B - Membrane module supported by rigid rotatable barrel body and working under supergravity condition - Google Patents

Membrane module supported by rigid rotatable barrel body and working under supergravity condition Download PDF

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CN101653700B
CN101653700B CN 200810054213 CN200810054213A CN101653700B CN 101653700 B CN101653700 B CN 101653700B CN 200810054213 CN200810054213 CN 200810054213 CN 200810054213 A CN200810054213 A CN 200810054213A CN 101653700 B CN101653700 B CN 101653700B
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membrane module
membrane
barrel body
supported
rotatable barrel
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CN101653700A (en
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周志杰
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Sun Yunfei
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Abstract

The invention relates to a membrane module supported by a rigid rotatable barrel body and working under a supergravity condition, which consists of a membrane module shell, a raw material liquid distributor, a separation membrane and a bubble light liquid guiding device, wherein one end of the separation membrane is fixed on the side wall of the membrane module shell; the outside of the side wall of the membrane module shell is provided with a groove corresponding to the end part of the separation membrane; the groove is communicated with the inner cavity of the separation membrane; the other end of the separation membrane is a closed end capable of freely moving; the outer edge of an upper end cover of the membrane module shell is provided with a chamfer; the outer edge of a lower end cover of the membrane module is provided with a concentrated solution outlet; the center of the membrane module shell is fixed with the raw material liquid distributor; the center of the upper end of the raw material liquid distributor is provided with the bubble light liquid guiding device; the side wall of the bubble light liquid guiding device is provided with a raw material liquid guiding outlet; and the outside of the side wall of the bubble light liquid guiding device is provided with a bubble light liquid guiding groove. The membrane module has the advantage that the membrane separation technology is effectively combined with the supergravity technology to effectively overcome adverse effects brought by concentration difference polarization in the membrane separation process so as to improve the effect of membrane separation.

Description

Rely on rigid rotatable barrel body to be supported on the membrane module of working under the hypergravity condition
Technical field:
The invention belongs to a kind of membrane module, particularly a kind ofly can carry out under the hypergravity condition that film separates, and rely on rigid rotatable barrel body to make the membrane module that supports.
Background technology:
Membrane separation technique has been widely used in the fields such as chemical industry, medicine, food, the energy, environmental protection at present because of advantages such as it is efficient, energy-conservation, the easy amplifications of process.Yet since concentration polarization in the film separation process, the existence of the aspect problems such as film pollution, and applying of membrane separation technique has been subject to a lot of restrictions, although people have researched and developed a lot of methods and attempted to address the above problem, is not very desirable.For example with the film separation process of pressure as driving force, concentration difference extreme difference phenomenon ubiquity.Because the concentration of the film separating layer outer surface material that plays a crucial role in the film separation process during generation of concentration difference extreme difference is higher than the main body concentration of material far away, brought a lot of adverse influences therefore for the film separation process, specifically have: 1, the rejection of solute reduces (being used for desalinization such as anti-seepage membrane) in a lot of film separation processes.2, the film permeation flux reduces, and the production capacity of device descends.3, the osmotic pressure on the membrane interface increases, and must improve feed pressure or improve the feeding liquid flow velocity for improving permeation flux, thereby cause the raising of energy consumption.4, film pollutes aggravation, and membrane lifetime descends.5. the film concentration rate descends, and is difficult to obtain the high concentration product.In order to reduce concentration polarization and concentration polarization adverse effect, people have proposed many solutions, and be applied to the film separation process, but practice show these methods all exist to some extent such or such defective as: 1. energy consumption strengthens and (to increase flow velocity method, turbulence promoter is installed, impulse method, paddling process, improve the diffusion coefficient method, rotation reinforcement etc.) 2. the packed density of film is low.3. the film separating layer is easily impaired for elementary membrane area membrane module cost high (stuffing process is installed turbulator, the rotation reinforcement), and membrane lifetime reduces (turbulator being installed, stuffing process, rotation reinforcement)
Hypergravity refers to than terrestrial gravitation acceleration (9.8m/s 2) the suffered power of material (comprising gravitation or repulsive force) under the much bigger environment, utilize hypergravity the practical technique created of the principles of science be called high-gravity technology.The suffered power relevant with material mass of material has obtained great reinforcement thereby has strengthened greatly mass transfer effect under the hypergravity condition, this feature has great using value, the present hypergravity machine that produces Elevated Gravity by High Rotation Speed is at separating technology, and the aspects such as nano material preparation have obtained very successful application.
Film under the hypergravity separates, and is the technical process that film separates to be placed under the hypergravity condition carry out, and this is the combination of membrane separation technique and high-gravity technology.The data that can look at present in this regard seldom, in known consulting reference materials, there are Yan Jianmin " the rotating bed super gravity field device with tubular structure " (number of applying for a patent 03115674.6) and above-mentioned 2 patents of " centrifugal rotation hypergravity---membrane separation technique " (number of applying for a patent 03100089.4) membrane separation technique and high-gravity technology to be carried out combination, and proposed specific embodiment.But carefully analyze research and be not difficult to find that above-mentioned 2 patents are not mentioned solves operation principle and the solution that on film separation process affects great concentration polarization problem after above-mentioned 2 patents, in its structure and embodiment, also there is obvious defective, makes a concrete analysis of as follows:
Patent " the rotating bed super gravity field device with tubular structure " emphasizes it is characterized in that in its claim the axis of pipe and rotating shaft are perpendicular or parallel in 1., the two ends of pipe are fixed, in fact the coriolis force that when pipe is organic tubular membrane or hollow-fibre membrane and other flexible material films, is subject to owing to liquid in the membrane module, the effect of inertia of feed liquid all can will produce huge side force when revolving bed stopped in the startup formula to pipe, the axis of pipe can not be straight line under the effect of this side force, thereby just do not have vertical with rotating shaft yet, if by the fixing method in two ends keep its axis be straight line and with rotating shaft axis perpendicular or parallel so under the effect of above-mentioned side force film be easy to be broken and make the membrane separation device inefficacy.In its specification and accompanying drawing, can find in it is implemented, can't solve the discharge problem of dam thing or seepage remaining liquid.
Patent " centrifugal rotation hypergravity---membrane separation technique ", emphasize that in its claims " the separation driving force take rotary centrifugal force as film is the membrane separation technique of principle; comprise technical process and theoretical meter mark " is according to this principle in one's power, technical process and theoretical calculating all can't solve the great concentration polarization problem of impact in the film concentration process.2. the separating layer surface of the selected Flat Membrane of this patent all is towards rotating shaft axis, such film device when its work, concentration polarization that can aggravation film surface under the effect of centrifugal force.
Summary of the invention:
Purpose of the present invention just is to overcome above-mentioned the deficiencies in the prior art, and provide a kind of membrane module that relies on rigid rotatable barrel body to be supported on and to work under the hypergravity condition, this membrane module can overcome the adverse effect that the concentration polarization in the film separation process brings effectively, thereby has improved the effect that film separates.
Technical scheme of the present invention is: a kind of dependence rigid rotatable barrel body supports, and the membrane module of working under the hypergravity condition is characterized in that: be comprised of membrane module housing, material liquid distributor, diffusion barrier and bubble light liquid exporter; One end of diffusion barrier is fixed on the sidewall of membrane module housing, and the outside of membrane module housing sidewall has groove corresponding to the end of diffusion barrier, and groove is communicated with the inner chamber of diffusion barrier; The other end of diffusion barrier is the blind end that can move freely; The outward flange of membrane module housing upper end cover has a chamfering, membrane module bottom end cover outward flange has concentrated solution outlet, the central authorities of membrane module housing are fixed with the material liquid distributor, bubble light liquid exporter is equipped with in material liquid distributor upper end central authorities, its sidewall has the material liquid export mouth, and has bubble light liquid derivation groove in its sidewall outside.
The center line of above-mentioned membrane module housing can be installed perpendicular to horizontal plane, also can install horizontal by certain angle.
Above-mentioned diffusion barrier can be tubular film, hollow-fibre membrane and Flat Membrane.
Above-mentioned raw materials liquid export mouth is symmetrical along the membrane module central shaft, and shape is identical, and its center line can be identical with diametric(al), also can be at an angle.
The upper end cover inboard of above-mentioned membrane module housing is tapered.
The blind end of above-mentioned diffusion barrier can adopt the method for glue, epoxy resin, heating or sintering to seal.
Above-mentioned membrane module housing can be truncated cone-shaped, cylindrical; Its material can be epoxy resin, also can be the composite that epoxy resin and metal material or plastic nylon form.
The internal diameter of above-mentioned hollow-fibre membrane is between the 0.005-0.1mm.
The material of above-mentioned diffusion barrier can adopt has flexible organic film or inoranic membrane, also can adopt the screen cloth by wire, glass fibre, nylon yarn, chemical fibre, animal and plant fiber, silk braiding.
The separating layer surface of above-mentioned Flat Membrane is the turning cylinder axis dorsad, and the back side is pasted with thin plate, and the material of thin plate can be plastics, nylon sheet, metallic plate; Flat Membrane also can be fixed by the Flat Membrane support near an end of pivot center; The bus of Flat Membrane can be parallel with the central axis of membrane module, also can with the membrane module central axis at an angle.
Operation principle of the present invention is: same feed liquid its concentration behind solvent removal strengthens, strengthening its density with its concentration can change, the density of feed liquid can raise with the increasing of its concentration as a rule, the sedimentation of the sedimentation of high concentration feed liquid and solvent or diluent liquid is not all hindered settling, the solute granule interacts when being the high concentration material sedimentation, infall process is communality, the broad perspectives sedimentation.In the film separation process because concentration polarization, the feed concentration on film surface is far above the main body concentration of feed liquid, particularly the high concentration feed liquid can be along the identical of super gravity field or rightabout fast moving under the hypergravity condition in the existence of this density contrast so there are difference in the feed liquid density on film surface and the body density of feed liquid, thereby break away from the film surface, thereby and the additional space of abdicating because of the dense material disengaging of height film surface of new solvent or diluent liquid makes film surface feed concentration reduce (being the concentration polarization reduction).Constantly replenishing of the continuous disengaging of the high dense material in film surface and rare material, when reaching this weighing apparatus film surface and near say and form that a concentration is higher than feed liquid theme concentration but far below a comparatively stable area level of concentration polarization layered material liquid concentration under the non-hypergravity condition, the existence of this area level, be similar to Dynamic Membrane, separation process produces preferably effect to film.
Advantage of the present invention is: membrane separation technique and high-gravity technology are combined effectively, have higher feasibility, can effectively overcome the adverse effect that the concentration polarization in the film separation process brings, thereby improved the effect that film separates.
Description of drawings:
Fig. 1 is the main pseudosection of the present invention when adopting tubular film or Middle hollow fiber membrane film
Fig. 2 is the top plan view of Fig. 1.
Fig. 3 is the main pseudosection of the present invention when adopting Flat Membrane.
Fig. 4 is the top plan view of Fig. 3.
The specific embodiment:
Fig. 1, Fig. 2 are main pseudosection and the top plan view of diffusion barrier 3 membrane module when selecting tubular film or hollow-fibre membrane.Membrane module housing center line can be installed perpendicular to horizontal plane, also can install horizontal by certain angle.Membrane module housing 1 is fixedly mounted on rigid crust and rotates in the staving 4.
Membrane module housing 1 is truncated cone-shaped among the figure, its inside sidewalls is fixed with diffusion barrier 3, the sidewall outside has groove 13 corresponding to exit, diffusion barrier 3 outer end along the sidewall generatrix direction, groove 13 is communicated with the inner chamber of diffusion barrier 3, discharges by diffusion barrier penetrating fluid outlet 5 in order to see through liquid.Membrane module housing 1 sidewall outer rim and upper end cover outer rim intersection have a chamfering 17, so that 11 compressed air that enter can enter by groove 13 inner chamber of diffusion barrier 3 from the compressed air inlet, thereby realize the backwash of gas.The bottom end cover outer edge of membrane module housing 1 has concentrated solution outlet 6, so that collecting in the concentrate of membrane module housing 1 inside sidewalls under the effect of centrifugal force discharges, the upper end cover inboard of membrane module housing 1 is tapered, is convenient to the bubble that produces in the film separation process and is lower than the light liquid of feed liquid body density and bubble and bubble light liquid exporter 8 derivation of gas by being fixed on material liquid distributor 2 tops of gas back-flushing generation.Have the export mouth 9 of being convenient to bubble and light liquid derivation on the bubble light liquid exporter 8.Diffusion barrier one end is fixed on the inboard of membrane module housing 1 sidewall, membrane module housing 1 inside sidewalls brushwork epoxy resin does not leak to guarantee the feed liquid in the membrane module housing, the other end of diffusion barrier 3 is the blind end that can move freely, with guarantee feed liquid the inner chamber by film with mix through liquid.Encapsulation process can adopt glue or adhering with epoxy resin, also can adopt the method for sintering or high-temperature heating to carry out.Diffusion barrier can adopt hollow-fibre membrane, its internal diameter is between the 0.005-0.1mm, it is the inoranic membrane that has flexible organic film or have enough flexibilities through processing, its end near rotating shaft does not fix, even diffusion barrier is subject to the flow side force that produces of coriolis force and feed liquid and also can takes advantage of a situation and moving with ripple like this, and can not fracture or break.The central authorities of membrane module housing are fixed with feed distributor 2, and its sidewall has material liquid export mouth 7, and have bubble light liquid derivation groove 12 in its sidewall outside.The material liquid export mouth is symmetrical along the membrane module central shaft, and shape is identical, and its center line can be identical with diametric(al), also can be at an angle.Material liquid enters material liquid distributor 2 inner chambers through material liquid entrance 10, evenly enters membrane module housing inner chamber by material liquid export mouth 7.Because membrane module housing more than 1 is made by plastic nylon, epoxy resin, and wall is thin, can not bear higher pressure, but rotates on the staving 4 and bonding stablizing because it is fixed on rigid crust, so its pressure that bears evenly conduction rotates on the staving 4 to rigid crust, and can deformed damaged.Rigid crust rotates staving 4 when rotating, and the membrane module housing is along with its synchronous rotation, thereby the film separation process is carried out under the hypergravity condition.
Fig. 3 and Fig. 4 be diffusion barrier when selecting Flat Membrane the master of membrane module look section and top plan view.The structure of membrane module and Fig. 1, membrane module structure shown in Figure 2 are roughly the same, the separating layer surface of Flat Membrane turning cylinder axis dorsad when mounted just, like this because the high dense material on the film surface that concentration polarization produces can be away from the film surface under the effect of centrifugal force, thereby reduce the impact of concentration polarization.The back side of Flat Membrane 16 is pasted with thin plate 15, and to accept dense feed liquid and it is derived, the material of thin plate can be plastics, nylon sheet, metallic plate.Flat Membrane also can be fixing by Flat Membrane support 14 near an end of pivot center, and is balanced with the spacing that guarantees film and film.The bus of Flat Membrane can be parallel with the central axis of membrane module, also can with the membrane module central axis at an angle.This Flat Membrane can be organic film and inoranic membrane, also can be the screen cloth by wire, glass fibre, nylon yarn, chemical fibre, animal and plant fiber, silk braiding.
The course of work of the present invention is: the membrane module housing that is installed in the rigid rotatable barrel body rotates with it when rigid rotatable barrel body rotates, and make material liquid in membrane module and the body thereof, seeing through liquid is under the overweight condition, material liquid enters the middle part cavity of material liquid distributor by the material liquid entrance, under the effect of the input pressure of material liquid and centrifugal force, material liquid enters membrane module housing inner chamber equably by the material liquid export mouth, contact with diffusion barrier, the material liquid pressure that produces in the effect of the input pressure of material liquid and centrifugal force and under the common material liquid pressure-acting that forms, the absciss layer that water in the material liquid or solvent see through diffusion barrier enters the inner chamber of diffusion barrier, and discharges through seeing through the liquid outlet under the effect of overbottom pressure behind centrifugal force and the film.Along with water or solvent constantly see through diffusion barrier, the concentration of surface, the separating layer surface material of diffusion barrier constantly increases, and its density also strengthens the density contrast of formation and main body material along with the increase of concentration.Under the effect of overweight centrifugal force dense material break away from the film surface and in the membrane module housing cavity edge concentrate, and discharge by concentrated solution outlet.Be lower than the light feed liquid of feed liquid main body concentration and bubble and under the effect of buoyancy, concentrate to material liquid distributor outward flange, and derive groove by the bubble light liquid and upwards compile through bubble light liquid export mouth and discharge.

Claims (10)

1. a membrane module that relies on rigid rotatable barrel body to be supported on and to work under the hypergravity condition is characterized in that: be comprised of membrane module housing, material liquid distributor, diffusion barrier and bubble light liquid exporter; One end of diffusion barrier is fixed on the sidewall of membrane module housing, and the outside of membrane module housing sidewall has groove corresponding to the end of diffusion barrier, and groove is communicated with the inner chamber of diffusion barrier; The other end of diffusion barrier is the blind end that can move freely; The outward flange of membrane module housing upper end cover has a chamfering, membrane module bottom end cover outward flange has concentrated solution outlet, the central authorities of membrane module housing are fixed with the material liquid distributor, bubble light liquid exporter is equipped with in material liquid distributor upper end central authorities, its sidewall has the material liquid export mouth, and has bubble light liquid derivation groove in its sidewall outside.
2. dependence rigid rotatable barrel body according to claim 1 is supported on the membrane module of working under the hypergravity condition, it is characterized in that: the central shaft of above-mentioned membrane module housing is installed perpendicular to horizontal plane, or installs horizontal by certain angle.
3. dependence rigid rotatable barrel body according to claim 1 is supported on the membrane module of working under the hypergravity condition, it is characterized in that: above-mentioned diffusion barrier is tubular film or hollow-fibre membrane or Flat Membrane.
4. dependence rigid rotatable barrel body according to claim 1 is supported on the membrane module of working under the hypergravity condition, it is characterized in that: the material liquid export mouth is symmetrical along the membrane module central shaft, shape is identical, and its center line is identical with diametric(al) or at an angle.
5. dependence rigid rotatable barrel body according to claim 1 is supported on the membrane module of working under the hypergravity condition, it is characterized in that: the upper end cover inboard of above-mentioned membrane module housing is tapered.
6. dependence rigid rotatable barrel body according to claim 1 is supported on the membrane module of working under the hypergravity condition, it is characterized in that: the blind end of above-mentioned diffusion barrier adopts the method for epoxy resin heating or sintering to seal.
7. dependence rigid rotatable barrel body according to claim 1 is supported on the membrane module of working under the hypergravity condition, it is characterized in that: above-mentioned membrane module housing is truncated cone-shaped or cylindrical; Its material composite that to be epoxy resin or epoxy resin form with metal material or plastic nylon.
8. dependence rigid rotatable barrel body according to claim 1 is supported on the membrane module of working under the hypergravity condition, it is characterized in that: the internal diameter of above-mentioned hollow-fibre membrane is between the 0.005-0.1mm.
According to claim 1 or 3 described dependence rigid rotatable barrel bodies be supported on the membrane module of working under the hypergravity condition, it is characterized in that: the material of above-mentioned diffusion barrier adopt have flexible organic film, inoranic membrane or by the screen cloth of a kind of braiding in wire, glass fibre, nylon yarn, the animal and plant fiber braiding.
10. dependence rigid rotatable barrel body according to claim 3 is supported on the membrane module of working under the hypergravity condition, it is characterized in that: the separating layer surface of above-mentioned Flat Membrane is the turning cylinder axis dorsad, and the back side is pasted with thin plate, and the material of thin plate adopts plastics or nylon sheet or metallic plate; Flat Membrane is fixed by the Flat Membrane support near an end of pivot center; The bus of Flat Membrane parallel with the central axis of membrane module or with the membrane module central axis at an angle.
CN 200810054213 2008-08-22 2008-08-22 Membrane module supported by rigid rotatable barrel body and working under supergravity condition Expired - Fee Related CN101653700B (en)

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Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104785115B (en) * 2014-01-16 2018-02-13 周志杰 Membrane module is arranged on the hypergravity membrane separator rotated coaxially on auger conveyor with rotary drum differential

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1424134A (en) * 2003-01-09 2003-06-18 邵显东 Centrifugal rotary supergravity-membrane separating technology
CN1465428A (en) * 2002-06-20 2004-01-07 杨时英 Application method for membrane
CN2925588Y (en) * 2006-02-16 2007-07-25 三达膜科技(厦门)有限公司 Rotary-film apparatus

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1465428A (en) * 2002-06-20 2004-01-07 杨时英 Application method for membrane
CN1424134A (en) * 2003-01-09 2003-06-18 邵显东 Centrifugal rotary supergravity-membrane separating technology
CN2925588Y (en) * 2006-02-16 2007-07-25 三达膜科技(厦门)有限公司 Rotary-film apparatus

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