WO1995009983A1 - Pompe avec plusieurs stages de pompage distincts pour pomper plusieurs liquides - Google Patents
Pompe avec plusieurs stages de pompage distincts pour pomper plusieurs liquides Download PDFInfo
- Publication number
- WO1995009983A1 WO1995009983A1 PCT/CA1994/000547 CA9400547W WO9509983A1 WO 1995009983 A1 WO1995009983 A1 WO 1995009983A1 CA 9400547 W CA9400547 W CA 9400547W WO 9509983 A1 WO9509983 A1 WO 9509983A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- liquid
- pump
- enclosure
- pumping
- outlet
- Prior art date
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D1/00—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps
- F04D1/06—Multi-stage pumps
- F04D1/10—Multi-stage pumps with means for changing the flow-path through the stages, e.g. series-parallel, e.g. side loads
-
- 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
- B01D61/10—Accessories; Auxiliary operations
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D13/00—Pumping installations or systems
- F04D13/12—Combinations of two or more pumps
- F04D13/14—Combinations of two or more pumps the pumps being all of centrifugal type
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/08—Sealings
- F04D29/10—Shaft sealings
- F04D29/106—Shaft sealings especially adapted for liquid pumps
Definitions
- the invention relates to a liquid recirculation pressure pump which mainly includes an intermediate liquid inlet and outlet. More particularly, the present invention relates to an installation serving for the concentration of a solution, in particular maple water, impure water, and the like, by the use of a process using a semi membrane -permeable.
- the pressure pump is used both for conveying the liquid, such as maple water, from a storage tank to a filter, and then for introducing the filtered liquid under pressure. in the compartment which contains the membrane, and finally for the recirculation of said liquid in order to remedy the clogging of the membrane, and decrease the concentration at the surface of the membrane, which causes a reduction in the osmotic pressure and causes an increase in the permeation rate.
- reverse osmosis the solutions of salts or other solutes, in particular of low molecular weight, for example sea water, maple water and others, are brought into contact with a selective membrane and subjected at a pressure. Contrary to what happens in the case of a normal osmosis where there is equilibrium of the solution on both sides of the membrane, reverse osmosis means that a solution whose concentration is lower and even very very low, emerges on the side of the membrane opposite the original solution.
- Clogging is commonly called all phenomena, other than temperature variation and compaction, which lower the permeability to pure water of a membrane. These phenomena are linked to the presence of solutes or suspended matter, in particular colloids, bacteria, etc., which can deposit on the surface or in the pores of the membrane. Clogging can be more or less rapid depending on the nature of the particles present and their concentration on the surface of the membrane. To obviate problems following the clogging of the membrane, which is more or less reversible, rinsing with pure cold or hot water is used, or by cleaning.
- maple water In the production of maple syrup, maple water has always been evaporated until the syrup is obtained. However, with the vertiginous increase in the price of energy, it has proved useful to carry out this evaporation from a solution more concentrated than the water obtained directly from the maple. To do this, recourse was had to reverse osmosis which rejects almost pure water and ultimately gives more concentrated water. As in the other cases of reverse osmosis, there is a serious problem of clogging of the membrane. In fact, the solutes of maple water are essentially sugars and minerals. Maple water also contains bacteria, the number of which can vary from a few tens to several million per ml.
- solutes are almost completely retained by the membranes called reverse osmosis or nanofiltration, in particular very close to 100% for the sugars and more than 95% for the minerals.
- a fortiori, suspended particles, including bacteria, are also retained.
- the larger sugar molecules diffuse more slowly than ions, the most common form of minerals in solution. All this favors, relatively, a greater accumulation of sucrose than of minerals on the surface of the membrane resulting in a significant clogging of the latter.
- another pump is also required to convey the raw maple water stored in a storage tank (or in any tank) of this tank to a filter intended to remove some of the impurities found in the water. raw maple.
- a first pump to convey the raw maple water from the storage tank to the filter
- a second pump to convey the filtered maple water from this filter to the reverse osmosis device.
- a third pump for the recirculation of the solute coming from the reverse osmosis device towards the inlet of this same device.
- the object of the invention is therefore to propose a new pump designed for certain uses normally requiring at least two standard pumps and characterized in that it comprises at least two separate pumping means designed to pump at least two liquids and comprising in particular an outlet and an intermediate liquid inlet.
- Another object of the invention resides in a pump comprising at least two distinct series of pumping stages and separation means arranged between the intermediate outlet and inlet for diverting the liquid.
- Another object of the invention resides in that, at the end of the first series of pumping stages, the liquid is completely withdrawn from the pump via the intermediate outlet and that a liquid, sometimes the same but treated in one way or another, access the second series of pumping courses through the intermediate entrance.
- a pump comprising an enclosure and at least first and second pumping means inside the enclosure which are designed to be driven by the same motor, the first and second pumping means respectively including a liquid inlet and an outlet and being separated in the enclosure by separation means, the first and second pumping means also including respectively an intermediate bypass outlet and an intermediate liquid bypass inlet arranged on either side of the separation means so that a liquid entering the enclosure by the inlet is pumped by the first pumping means and leaves the enclosure by the intermediate bypass outlet, a liquid also being able to access the enclosure via the intermediate bypass inlet and be pumped by the second pumping means to the outlet.
- a pump comprising an enclosure and at least first and second pumping means inside the enclosure which are designed to be driven by the same motor, the first and second pumping means each including an inlet and an outlet for liquid and being separated in the enclosure by separation means, the first and second pumping means thus being designed to pump different liquids without mixing a inside the pump, the liquids entering the pumping means by respective inlets and leaving the latter via respective outlets.
- an installation for the concentration of a solution by reverse osmosis or other process using a semi-permeable membrane, which installation comprising an enclosure containing a semi-permeable membrane responsible the concentration of said solution; a pump allowing the introduction of said solution under pressure into said enclosure; as well as a means ensuring the recirculation of part of said solution, characterized in that said pump comprises first and second means, in particular two series of pumping stages, which are designed to be driven by the same motor, said first and second pumping means being separated hydraulically in said pump by separation means, said first pumping means including an inlet and an outlet for raw liquid, said second pumping means including an inlet and outlet for recirculated liquid so that a liquid accessing said pump via said raw liquid inlet is pumped by said first pumping means and exits from said pump through said raw liquid outlet, while a concentrated liquid coming from said enclosure accesses the second pumping means by said recirculated liquid inlet and spring from the pump through said recirc
- Figure 1 is a schematic representation of a pump according to the present invention with intermediate bypass inlets and outlets installed on a liquid filtration system and concentration of the liquid filtered by reverse osmosis;
- Figure 2 is a fragmentary elevation and partially in longitudinal section of the pump of Figure 1;
- Figure 3 is an expanded and enlarged view of the pump section framed in dotted lines in Figure 2;
- Figure 4 is a schematic and fragmentary representation of a pump with multiple inlets and outlets also according to the present invention.
- the illustrated installation comprises a pump P according to the present invention, connected to a source of liquid not illustrated, such as a storage tank, by a pipe. 10 connected to a primary input 12 of the pump P, and to an enclosure 14, comprising a semi-permeable membrane 16, by a main output 18 and a pipe 20.
- a submersible motor M or an external motor M 1 (see FIG.
- the enclosure 14, including the membrane 16 is again connected to the pump P by a pipe 28 which opens at the start of the third series of pumping stages 26 via a secondary inlet 30 .
- the constituent elements of the first and second series of pumping stages 22 and 24 are chosen so as to ensure the delivery under pressure of a volume of solution to be concentrated which generally corresponds to the permeation capacity of the membrane 16 in installation and a discharge equivalent to approximately 10 to 25% of the permeation rate.
- the permeate ie practically pure water
- a concentrated solution ie maple water concentrated in sugar
- the components of the third series of pumping stages 26 they will have to ensure that a large volume of recirculation liquid is delivered.
- the building blocks - io ⁇ of the third series of stages 26 have been illustrated by the reference number 34.
- elements 36 constituting a guide allowing the simultaneous routing towards the third series of pumping stages 26, of the liquid to be concentrated coming from the first and second series of pumping stages 22 and 24 as well as of the liquid recirculated in the third series of stages 26 pump P, via line 28 and secondary inlet 30, from enclosure 14 where the membrane 16 is located.
- the present invention is characterized by the structure which is inserted between the first and second series of pumping stages 22 and 24 and between the second and third series of pumping stages 24 and 26.
- the liquid from the storage tank via the pipe 10 and the primary inlet 12 cannot directly access from the first series of stages 22 to the second series of stages 24 through the enclosure 27 of the pump P since there is in the latter, between the first and second series of pumping stages 22 and 24 and between the second and third series of pumping stages 24 and 26, devices for completely interrupting the flow of the liquid in the pump P.
- the end of the first series of pumping stages 22 is equipped with a first intermediate outlet 38 which opens onto a first bypass pipe 40.
- the li that deviated out of pump P is routed through this first bypass line 40 to, for example, a filter F (eg 5 microns) designed to remove some of the impurities from the liquid, such as maple water.
- the filtered liquid is then conveyed by means of a second bypass line 42 to an intermediate inlet 44 which communicates with the start of the second series of pumping stages 24.
- the liquid thus filtered is brought to high pressure by the second series of pumping stages 24 and the high pressure liquid is forced to come out of the pump P by a second intermediate outlet 45 and joins by a pipe 47 the pipe 20, where the high pressure filtered liquid mixes with the recirculated liquid which is delivered by the third series of pumping stages 26 through the main outlet 18.
- the elements 32 and 34 are propellants, those located at the level of the first and second series 22 and 24 of pumping stages being suitable for ensuring the delivery of a given volume of liquid to be concentrated towards the enclosure 14, which volume is dictated by the capacity of the membrane 16.
- the third series of pumping stages 26 they are propellants with a larger volume than those provided for the series of stages 22 and 24 because they must carry the recirculated liquid towards the membrane 16.
- the three series of pumping stages 22, 24 and 26 are all driven by a common shaft 46 (itself driven by a single motor, that is to say ie the motor M) which is of hexagonal section. In general, the shaft 46 rotates the impellers of the elements 32 and 34 while the diffusers and the enclosures or peripheral rings thereof remain fixed relative to the shaft 46.
- bypass elements 52 Between the first and second pumping stages 22 and 24 and between the second and third series of pumping stages 24 and 26 are found bypass elements 52.
- the bypass elements 52 located between the first and second series of pumping stages 22 and 24 are illustrated in detail in FIGS. 2 and 3, the bypass elements 52 located between the second and third series of pumping stages 24 and 26 being similar, therefore, not being illustrated here in detail.
- Each bypass element 52 includes a peripheral rim 54 which can be tightly fitted with an adjacent rim 54 or with the elements 32 of the first and second pumping stages 22 and 24.
- the rim 54 is connected to a central hub 56 pierced with a hole by lines 58 of radial orientation and in the form of blades.
- the rim 54, the central hub 56 and the lines 58 are made in an integral plastic construction.
- a bronze bushing 60 fixed in the hole of the central hub 56 internally receives a sleeve 62 which provides an interior opening of a shape corresponding to the shaft 46 so that the sleeves 62 move in rotation with the shaft
- the intermediate outlet and inlet 38 and 40 communicate with the recessed parts of the bypass elements 52 (ie the parts formed between the lines 58 longitudinally and between the central hub 56 and the rim 54 radially) through openings made in a known way (eg in the aforementioned pending Canadian patent application) in the rims 54.
- a separation disc 64 fixedly interposed between two of the elements 52 and also located between the intermediate outlet and inlet 38 and 40 is designed to divert all the liquid out of the pump P via the intermediate outlet 38, to the filter F via the bypass line 40, the filtered liquid again accessing the pump P, at the second series of pumping stages 24, via the intermediate inlet 44.
- the separating disc 64 is full except for an interior opening intended to surround the sleeves 62.
- the disc includes a flexible annular section 66, possibly covered with Teflon TM, which abuts on the sleeves 62 to ensure the seal inside the pump P longitudinally on either side of the separation disc 64 at the interfaces between the fixed parts and the rotating parts.
- the flexible annular section 66 here comprises two tabs 67 so as to produce a bidirectional tight seal.
- the seal between the periphery of the rims 54 and the interior of the enclosure 27 of the pump P is provided by O-rings 68.
- bypass elements 52 of the second and third series of pumping stages 24 and 26 and, more particularly, the separation disc 64 causes the filtered liquid to be diverted out of the pump P by the second intermediate outlet 45 and towards the enclosure 14 via lines 47 and 20.
- the liquid supplied to the primary inlet 12 can flow at a rate of 10 gallons per minute (GPM) and at a pressure of 30 psi (liters per square inch).
- the liquid under a flow rate obviously of 10 GPM flows in the bypass lines 40 and 42 respectively under pressures, for example, of 70 psi and 55 psi, the difference being due to the pressure loss in the filter F.
- the liquid emerging from the first and second series of pumping stages 22 and 24 has a pressure of 485 psi and a volume of 10 GPM.
- the recirculated liquid and accessing via line 28 and the secondary inlet 30 to the third series of pumping stages 26 has a pressure of 485 psi and a flow rate of 60 GPM.
- the liquid emerging from the third series of stages 26 therefore has a flow rate of 60 GPM and a pressure of 500 psi since the second series of pumping stages is designed to pump a high volume while partially raising the established pressure of the liquid accessing it.
- 70 GPM of liquid at 500 psi mix outside of the pump P and are conveyed by the line 20 to the enclosure 14 which includes the semi-permeable membrane 16.
- the permeate emerging from the enclosure 14 through the outlet 48 can have a flow rate of 7.5 GPM at almost zero pressure. Therefore 62.5 GPM are directed to the recirculation line 28 and the concentrated liquid outlet 50.
- the discharge through the outlet 50 can be 2.5 GPM at almost zero pressure, while the liquid recirculated through the pipe 28 can have a flow rate of 60 GPM at a pressure of 485 psi.
- the first and second series of pumping stages 22 and 24 increase the pressure of the inlet liquid while the third series of stages 26 pumps a considerable volume of recirculating liquid. All three series of pumping courses allow high-pressure pumping of a considerable volume of liquid with bypass and recirculation, with one pump instead of three.
- this installation could be used not only for concentrating maple water, but also for any other liquid to be concentrated, in particular sea water, etc.
- This pump could also be used for three series of stages without it being associated with a reverse osmosis operation. Any system making use of a liquid under pressure and which requires a bypass and perhaps a recirculation of the latter could obviously make use of the pump according to the invention, making sure to dispense with the use of a second and a third pump.
- This pump allows unlimited pumping at flow rates and pressures.
- FIG 4 another pump P ' also according to the present invention is driven by the external motor M' by the way of a shaft such as the hexagonal shaft 46 of Figures 1 to 3.
- the pump P ' of Figure 4 is designed to pump four (4) different liquids without there being any mixing between them.
- the four liquids are pumped from reservoirs 100, 102, 104 and 106 by the first, second, third and fourth series of pumping stages 108, 110, 112 and 114, respectively.
- the four series of pumping stages include liquid inlets 116, 118, 120 and 122, respectively, and liquid outlets 124,
- the series of pumping stages 108, 110, 112 and 114 are separated from one another in the enclosure 27 of the pump P 'by bypass elements 52 identical to those of FIGS. 1 to 3.
- FIG. 4 clearly sees the three (3) separation discs 64 which separate the different series of pumping stages.
- the liquid contained in the reservoir 100 will be pumped by the first series of pumping stages 108 of the pump P 'and this, from left to right in FIG. 4 and in the direction of the disc 64 separating the first and second series of pumping stages 108 and 110.
- the liquid coming from the reservoir 102 will flow from right to left in the second series of pumping stages 110 of the pump P 'and towards the first series of pumping stages 108.
- the liquids reservoirs 104 and 106 will flow respectively in the third and fourth series of pumping stages 112 and 114 from left to right in FIG. 4.
- the liquids can circulate independently from left to right, or from right to left, in the different series of pumping stages 108, 110, 112 and 114.
- the flow rates and pressures of the liquids can vary from one series of pumping stages to the other-
- the pump P 'therefore allows the pumping of several liquids, having different flow rates and different pressures, using a single motor coupled to a single shaft designed to drive the different pumping stages each associated with a respective liquid.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Water Supply & Treatment (AREA)
- Nanotechnology (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
- Extraction Or Liquid Replacement (AREA)
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US08/624,436 US5785504A (en) | 1993-10-07 | 1994-10-06 | Pump with separate pumping stages for pumping a plurality of liquids |
AU78059/94A AU7805994A (en) | 1993-10-07 | 1994-10-06 | Pump with a number of distinct pumping stages for pumping several liquids |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CA2,107,933 | 1993-10-07 | ||
CA002107933A CA2107933C (fr) | 1993-10-07 | 1993-10-07 | Pompe avec plusieurs stages de pompage distincts pour pomper plusieurs liquides |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1995009983A1 true WO1995009983A1 (fr) | 1995-04-13 |
Family
ID=4152413
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/CA1994/000547 WO1995009983A1 (fr) | 1993-10-07 | 1994-10-06 | Pompe avec plusieurs stages de pompage distincts pour pomper plusieurs liquides |
Country Status (5)
Country | Link |
---|---|
US (1) | US5785504A (fr) |
CN (1) | CN1135253A (fr) |
AU (1) | AU7805994A (fr) |
CA (1) | CA2107933C (fr) |
WO (1) | WO1995009983A1 (fr) |
Families Citing this family (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2771024B1 (fr) * | 1997-11-19 | 1999-12-31 | Inst Francais Du Petrole | Dispositif et procede de compression diphasique d'un gaz soluble dans un solvant |
US6860349B2 (en) * | 2000-05-26 | 2005-03-01 | Honda Giken Kogyo Kabushiki Kaisha | Cooling system for fuel cell powered vehicle and fuel cell powered vehicle employing the same |
ES2219122B1 (es) * | 2001-07-27 | 2005-09-16 | Bolsaplast, S.A. | Bomba para sistemas desalinizadores de agua marina por osmosis inversa. |
US20080296224A1 (en) * | 2007-05-29 | 2008-12-04 | Pumptec, Inc. | Reverse osmosis pump system |
US8025799B2 (en) * | 2007-10-24 | 2011-09-27 | Denis Cote | Maple tree sap reverse osmosis device |
US8529972B2 (en) * | 2009-09-01 | 2013-09-10 | Eau Matelo Inc. | Process to extract drinking water from a plant |
US9316216B1 (en) | 2012-03-28 | 2016-04-19 | Pumptec, Inc. | Proportioning pump, control systems and applicator apparatus |
DE102013208060A1 (de) * | 2013-05-02 | 2014-11-06 | Meiko Maschinenbau Gmbh & Co. Kg | Reinigungsvorrichtung für Behälter für menschliche Ausscheidungen |
US10760557B1 (en) | 2016-05-06 | 2020-09-01 | Pumptec, Inc. | High efficiency, high pressure pump suitable for remote installations and solar power sources |
US10823160B1 (en) | 2017-01-12 | 2020-11-03 | Pumptec Inc. | Compact pump with reduced vibration and reduced thermal degradation |
CN112879308B (zh) * | 2021-01-23 | 2022-07-12 | 盐城富士恒动力机械有限公司 | 一种多级离心泵 |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3304012A1 (de) * | 1982-04-29 | 1983-11-10 | Herbert 7853 Steinen Hüttlin | Stroemungsmaschine fuer eine lueftungs-, heizungs- oder klimaanlage |
DE8810330U1 (de) * | 1988-08-16 | 1988-11-17 | Agfa-Gevaert Ag, 5090 Leverkusen | Fotografische Naßentwicklungsvorrichtung |
DE3838946A1 (de) * | 1987-11-17 | 1989-06-01 | Iwaki Co Ltd | Vielteilig gekoppelte magnetantriebspumpe |
WO1993014319A1 (fr) * | 1992-01-15 | 1993-07-22 | Denis Cote | Pompe a pression et a recirculation |
-
1993
- 1993-10-07 CA CA002107933A patent/CA2107933C/fr not_active Expired - Lifetime
-
1994
- 1994-10-06 WO PCT/CA1994/000547 patent/WO1995009983A1/fr active Application Filing
- 1994-10-06 CN CN94194119A patent/CN1135253A/zh active Pending
- 1994-10-06 US US08/624,436 patent/US5785504A/en not_active Expired - Lifetime
- 1994-10-06 AU AU78059/94A patent/AU7805994A/en not_active Abandoned
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3304012A1 (de) * | 1982-04-29 | 1983-11-10 | Herbert 7853 Steinen Hüttlin | Stroemungsmaschine fuer eine lueftungs-, heizungs- oder klimaanlage |
DE3838946A1 (de) * | 1987-11-17 | 1989-06-01 | Iwaki Co Ltd | Vielteilig gekoppelte magnetantriebspumpe |
DE8810330U1 (de) * | 1988-08-16 | 1988-11-17 | Agfa-Gevaert Ag, 5090 Leverkusen | Fotografische Naßentwicklungsvorrichtung |
WO1993014319A1 (fr) * | 1992-01-15 | 1993-07-22 | Denis Cote | Pompe a pression et a recirculation |
Also Published As
Publication number | Publication date |
---|---|
CA2107933C (fr) | 1998-01-06 |
US5785504A (en) | 1998-07-28 |
CN1135253A (zh) | 1996-11-06 |
CA2107933A1 (fr) | 1995-04-08 |
AU7805994A (en) | 1995-05-01 |
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