WO2004094053A1 - 流体混合装置 - Google Patents
流体混合装置 Download PDFInfo
- Publication number
- WO2004094053A1 WO2004094053A1 PCT/JP2004/005051 JP2004005051W WO2004094053A1 WO 2004094053 A1 WO2004094053 A1 WO 2004094053A1 JP 2004005051 W JP2004005051 W JP 2004005051W WO 2004094053 A1 WO2004094053 A1 WO 2004094053A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- pressure
- fluid
- valve
- line
- mixing
- Prior art date
Links
Classifications
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D11/00—Control of flow ratio
- G05D11/02—Controlling ratio of two or more flows of fluid or fluent material
- G05D11/03—Controlling ratio of two or more flows of fluid or fluent material without auxiliary power
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
- B01F23/40—Mixing liquids with liquids; Emulsifying
- B01F23/49—Mixing systems, i.e. flow charts or diagrams
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
- B01F35/80—Forming a predetermined ratio of the substances to be mixed
- B01F35/83—Forming a predetermined ratio of the substances to be mixed by controlling the ratio of two or more flows, e.g. using flow sensing or flow controlling devices
- B01F35/833—Flow control by valves, e.g. opening intermittently
Definitions
- the present invention relates to a fluid mixing device that supplies a fixed amount of fluid flowing through at least two supply lines to a mixing line in fluid transport in a chemical factory or various industries such as a semiconductor manufacturing field, a food field, and a bio field.
- a fluid mixing device that supplies a fixed amount of fluid flowing through at least two supply lines to a mixing line in fluid transport in a chemical factory or various industries such as a semiconductor manufacturing field, a food field, and a bio field.
- the fluid in each supply line can be supplied to the mixing line at a constant rate while maintaining a highly accurate mixing ratio.
- the mixing ratio of the mixing line can be changed without performing pump control on the fluid of the supply line, and the mixing line can be changed while the fluid is flowing only by adjusting the flow rate of one supply line.
- the present invention relates to a fluid mixing device capable of changing a mixing ratio.
- FIG. 7 As an example of a conventional fluid mixing device, there is a fluid mixing device as shown in FIG. 7 (for example, disclosed in Japanese Patent Application Laid-Open No. 2000-250634).
- the pump 102, the constant pressure control valve 103, the orifice 104, the pressure gauge 105, and the check valve 106 are connected in series to the passage 101 from the upstream side.
- the pump 1 08, constant pressure control valve 1 09, orifice 1 1 10, pressure gauge 1 1 1, and check valve 1 1 2 are connected in series from the upstream side as in the 1st supply passage 101.
- an in-line mixer 114 was provided on a mixing passage 113 where the fluid flowing through each supply passage was merged.
- the effect is that the fluid flowing through the first supply passage 101 is pumped by the pump 102 and flows into the constant pressure control valve 103. Fluid flowing into the constant pressure control valve 103 suppresses pulsation and is kept constant by the action of the constant pressure control valve 103.
- the pressure is set, and further flows into the mixing passage 113 through the orifice 104. At this time, the same action as the fluid in the first supply passage 101 occurs simultaneously in the second passage 107, and the fluid in the second passage 107 flows into the mixing passage 113.
- the fluid that had flowed into the mixing passage 113 and merged was sent to the in-line type mixer 114 to be stirred and mixed.
- the fluid flowing through each of the supply passages 101 and 107 was mixed into the mixing passage 113 at a predetermined fixed ratio while pulsation was suppressed. Further, by the action of the orifices 104 and 110, the mixing can be performed at a constant ratio without receiving the pressure fluctuation of the in-line mixer 114.
- the conventional fluid mixing apparatus has the following problems.
- the present invention has been made in view of the above-mentioned problems of the prior art.
- the purpose of this method is to supply at least a fixed amount of fluid flowing through at least two supply lines to the mixing line, and to constantly supply the fluid of each supply line to the mixing line even if the pressure downstream of the back pressure valve of the mixing line fluctuates.
- An object of the present invention is to provide a fluid mixing device that can supply a fixed amount and maintain a high-precision mixing ratio, and that can change the mixing ratio of the fluid in the supply line with high accuracy while the fluid is flowing. .
- FIG. 1 At least two first supply lines 1 and second supply lines 2 are connected to the converging point 4 where the second supplying line 2 merges with the mixing line 3, and the converging sections 5 and 6 and the constricting sections 5 and 6 adjust the flow rate of the fluid upstream of the merging point 4.
- the first feature is that the pressure reducing valves 7 and 8 are arranged in series further upstream of 6 and the back pressure valve 9 is arranged in the mixing line 3.
- the second feature is that the back pressure valve 9 and the flow meter 10 are arranged in series in the mixing line 3, and the third feature is that fixed orifices or control valves are used in the throttle sections 5, 6.
- the fourth characteristic is that the pressure reducing valves 7, 8 and the back pressure valve 9 are automatic valves.
- FIG. 1 is a configuration diagram schematically showing a first embodiment of the present invention
- FIG. 2 is a configuration diagram schematically showing a second embodiment of the present invention
- FIG. 3 is a longitudinal sectional view of the pressure reducing valve.
- FIG. 4 is a configuration diagram schematically showing a test apparatus for measuring the stability of the flow rate of the supply line.
- FIG. 5 is a graph showing the measurement results of the flow rate and the back pressure of the apparatus of the example.
- FIG. 6 is a graph showing the measurement results of the flow rate and the back pressure of the comparative example device.
- FIG. 7 is a configuration diagram schematically showing a conventional apparatus.
- Reference numeral 1 denotes a first supply line through which fluid A flows, and a pump 11, a pressure reducing valve 7, and an idle valve 5 serving as a throttle are arranged in series from the upstream side, and 2 denotes a second supply line through which fluid B flows.
- a pump 12 As in the case of the first supply line 1, a pump 12, a pressure reducing valve 8, and a needle valve 6, which is a throttle, are arranged in series from the upstream side.
- Reference numeral 4 denotes a merging point in the present apparatus, and is a position where the fluids A and B supplied respectively in a fixed amount merge.
- Reference numeral 3 denotes a mixing line, which is a line downstream from the junction 4.
- a back pressure valve 9 and a flow meter 10 are arranged in series. Further, an in-line mixer or the like (not shown) for uniformly mixing the force fluids A and B may be provided on the downstream side, and an instrument for measuring the concentration and the pH may be provided.
- the back pressure valve 9 and the flow meter 10 are sequentially arranged in the mixing line 3 from the merging point 4 toward the downstream side, but the flow meter 10 and the back pressure valve 9 are arranged in this order. Is also good.
- the members arranged on each line will be described in detail.
- the pumps 11 and 12 are bellows pumps without a sliding part for pumping fluid to the supply lines 1 and 2 respectively. Although a bellows pump is used in the present embodiment, the present invention is not limited to this embodiment, and any pump may be used regardless of the occurrence of pulsation.
- the pressure reducing valves 7 and 8 adjust the pressure of each of the fluids A and B, adjust the flow rate, and suppress pulsation, and preferable ones are shown in FIG.
- the main body has a first valve chamber 13, a step portion 14 provided above the first valve chamber 13, and a fluid inlet 15 communicating with the first valve chamber 13.
- 16 and the second valve A lid 19 having a chamber 17 and a fluid outlet 18 communicating therewith and joined to the upper part of the main body, and a first diaphragm having a peripheral part joined to an upper peripheral part of the first valve chamber 13 20; a second diaphragm 21 whose peripheral portion is sandwiched between the main body 16 and the lid 19; and two annular joints provided at the center of the first and second diaphragms 20 and 21.
- a fluid control unit is provided between the sleeve 24 joined to 2 and 23 and being movable in the axial direction and the lower end of the sleeve 24 fixed to the bottom of the first valve chamber 13.
- an air chamber 27 surrounded by the inner peripheral surface of the step portion 14 of the main body and the first and second diaphragms 20 and 21.
- the pressure receiving area of the second diaphragm 21 is larger than the pressure receiving area of the first diaphragm 20, and an air supply port 28 communicating with the air chamber 27 is provided in the main body. It is a structure. The effect is that a constant internal pressure is applied to the air chamber 27 by operating air.
- the first diaphragm 20 applies the pressure inside the first valve chamber 13, that is, the primary side.
- the second diaphragm 21 receives a downward force due to the pressure inside the second valve chamber 17, that is, a fluid pressure on the secondary side, and an upward force due to the pressure inside the air chamber 27.
- the position of the sleeve 24 joined to the first and second diaphragms 20 and 21 is determined by the balance of these four forces.
- the sleeve 24 forms a fluid control part 25 with the plug 26, and controls the fluid pressure on the secondary side by the opening area.
- the secondary fluid pressure and flow rate also temporarily increase. At this time, an upward force acts on the first diaphragm 20 and a downward force acts on the second diaphragm 21 due to the fluid pressure, but the pressure-receiving area of the second diaphragm 21 affects the first diaphragm 20. Designed to be large enough to allow downward force to overcome upward force g
- the sleep 24 is pushed down.
- the opening area of the fluid control unit 25 is reduced, the fluid pressure on the secondary side is instantaneously reduced to the original pressure, and the balance between the internal pressure of the regeneration chamber 27 and the fluid pressure is balanced. Is kept.
- the secondary fluid pressure and flow rate also temporarily decrease.
- downward and upward forces act on the first and second diaphragms 20 and 21, respectively, due to the internal pressure of the air chamber 27, but even in this case, the pressure receiving area of the second diaphragm 21 is larger than that of the second diaphragm 21.
- the upward force overcomes the downward force, pushing the position of the sleeve 24 upward.
- the opening area of the fluid control unit 25 increases, the fluid pressure on the secondary side instantaneously rises to the original pressure, and the balance between the internal pressure of the air chamber 27 and the fluid pressure is again balanced. The original flow rate is maintained.
- the position of the sleep 24 changes instantaneously, and the pressure on the secondary side is always kept constant. Therefore, even if the inflowing fluid is pulsating, the fluid having a constant controlled pressure flows out from the outlet. Further, by injecting operating air into the air supply port 28 and adjusting the operating air pressure, the degree of pressure reduction of the fluid can be adjusted, and the flow rate can be adjusted.
- the diaphragms 20 and 21 are particularly useful with a fluororesin such as PTFE, and the main body is particularly useful with a resin such as PP, but other resins or metals may be used.
- the valve in feed pack control, it is more effective to use the valve as an automatic valve capable of adjusting the degree of pressure reduction of the fluid by an air pressure signal or an electric signal.
- the pressure reducing valves 7 and 8 are the same, but they are not necessarily the same as long as they have the function of adjusting the pressure, the flow rate, and the pulsation of each fluid. Also, it is not limited to those having the above structure.
- the ⁇ needle valves 5 and 6 adjust the flow rate by changing the opening area of the flow path.
- a needle valve is used, but a fixed orifice or a pinch is used as the throttle.
- a control valve such as a valve may be used.
- the pressure reducing valves 7 and 8 may be used as flow control valves by adjusting the operating air pressure.
- What is used as the above-mentioned restricting portion may be a general one that is usually used.
- the back pressure valve 9 absorbs fluctuations in the pressure of the fluid downstream of the valve, and constantly regulates the upstream pressure. It acts to keep it constant. Further, by adjusting the operating air pressure, the pressure on the upstream side of the back pressure valve 9 can be adjusted, and the pressure can be maintained at an arbitrary value.
- an automatic valve that can be adjusted to an arbitrary pressure by a pneumatic pressure signal or an electric signal is particularly effective.
- An ultrasonic flowmeter 10 measures the flow rate of the fluid in the mixing line 3, and converts the measured value of the fluid into an electric signal.
- an ultrasonic flow meter is used, but a Karman vortex flow meter, an impeller flow meter, an electromagnetic flow meter, a differential pressure flow meter, a positive displacement flow meter, a hot wire flow meter, or a mass flow meter is used.
- a commonly used device such as a meter may be used.
- the fluid ⁇ is pumped by the pump 11 and flows into the pressure reducing valve 7.
- Fluid A flows into the needle valve 5 from the pressure reducing valve 7 in a state where the pulsation is suppressed in the pressure reducing valve 7 and the degree of pressure reduction is further adjusted, and is supplied to the junction point 4.
- the fluid B is supplied to the confluence point 4 by the same operation as in the first supply line 1.
- the supply flow rate to the merging point 4 is determined by the differential pressure across the-$ 1 valves 5,6 of the first supply lines 1,2, and the opening area of the-$ 1 valves 5,6 is also determined. ⁇ Variable flow rate can be adjusted over a wide range.
- the fluids A and B supplied to the merging point 4 flow into the back pressure valve 9 of the mixing line 3.
- the pressure from the upstream side of the back pressure valve 9, that is, from the downstream side of each of the needle valves 5 and 6 to the back pressure valve 9 is constant. Because you can keep
- Each of the needle valves 5 and 6 can maintain a differential pressure, and the fluids A and B of each of the supply lines 1 and 2 are always supplied in a stable state at a constant amount to the merging point 4.
- the fluid passing through the back pressure valve 9 is measured in real time by the flow meter 10, and the measured value of the flow rate is converted into an electric signal.
- the pressure reducing valves 7, 8 and the back pressure valve 9 are automatic valves, the electric signal is fed back to the pressure reducing valves 7, 8 or the back pressure valve 9 so that the degree of pressure reduction is adjusted and the flow rate of the mixing line 3 is controlled. be able to.
- the high-precision mixing ratio can be easily changed without being affected by the pressure of the fluid B of No. 2. Also, when the mixing ratio is changed by decreasing the flow rate of the fluid B in the second supply line 2, the mixing ratio can be easily and highly accurately changed.
- the mixing ratio of the fluid in the mixing line 3 when the mixing ratio of the fluid in the mixing line 3 is changed, the mixing ratio can be changed without performing pump control on the supply line fluid, and the flow rate of only one supply line can be adjusted.
- the mixing ratio can be changed easily and accurately with the fluid supplied.
- the total flow rate can be changed by changing the opening area of the back pressure valve 9.
- Reference numeral 29 denotes a first supply line through which the fluid C flows.
- a pump 30, a pressure reducing valve 31, and a needle valve 32 serving as a throttle portion are arranged in series from the upstream side, and reference numeral 33 denotes a second supply line through which the fluid D flows.
- Line 34 is a third supply line through which fluid E flows, and pumps 35, 36, pressure reducing valves 37, 38, and a throttle section from the upstream side similarly to the first supply line 29.
- Needle valves 39 and 40 are respectively arranged in series.
- Reference numeral 41 denotes a merging point, which is a position where the fluids C, D, and E which are respectively supplied in a fixed amount finally merge.
- 4 2 is a mixing line
- the merging point is the line after 41.
- a back pressure valve 43 and a flow meter 44 are arranged in series.
- the description and operation of the members arranged on each line are the same as in the first embodiment, and will not be described.
- a test to measure the supply stability of the fluid in the supply line over time with respect to the pressure fluctuation downstream from the back pressure valve in the fluid mixing device of the present invention was performed using the apparatus shown in FIG. 4 in the following manner. went.
- the first supply line 45 was supplied with red water, which is water at room temperature and colored red. From the upstream side of the first supply line 45, a tank 46, a pump 11, a pressure reducing valve 7, an ador valve 5, and an ultrasonic flow meter 47 for measuring the flow rate of red water were arranged. In addition, blue water, which is water at room temperature and was colored blue, was supplied to the second supply line 48. The same members as in the first supply line 45 were arranged in the second supply line 48. Further, in the mixing line 3, a back pressure valve 9, a pressure gauge 49, an ultrasonic flow meter 10, and a needle valve 50 for varying the pressure downstream from the back pressure valve 9 were arranged. As a comparative device, a device in which the back pressure valve 9 of the mixing line 3 of the device of this example was removed was used.
- the flow rate of the red water in the first supply line 45 measured at 7 was set so as to be 20 mL / min.
- the discharge pressure of the pump 12 is set to 0.3 MPa
- the operating air pressure of the pressure reducing valve 8 is set to 0.3 IMPa
- the opening of the needle valve 6 is set to the second supply line 48.
- the flow rate was adjusted, and the flow rate of blue water in the second supply line 48 was measured by the ultrasonic flowmeter 51 so as to be 120 mL / min.
- the opening of the needle valve 50 is gradually reduced, and the pressure on the upstream side of the needle valve 50 (back pressure of the back pressure valve 9) is increased by a pressure gauge 49 to supply each of the supply lines 45,
- the flow rate of No. 8 was measured with the ultrasonic flowmeters 47 and 51 over time, respectively.
- the embodiment apparatus does not change the flow rate of each supply line even if the back pressure rises to 0.2 MPa. , was supplied to the mixing line 3 at a constant and high precision.
- the opening of the needle valve 50 is reduced, and when the back pressure increases, the flow rate of each decreases, and the mixing line 3 Quantitative supply became impossible.
- the present invention has a configuration as described above, and the following excellent effects can be obtained by using the configuration.
- the mixing ratio of the mixing line can be changed by changing the flow rate of the supply line only, without pump control of the supply line fluid.
- the total flow rate can be adjusted while maintaining the mixing ratio of the mixing line with high accuracy while the fluid is supplied.
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Accessories For Mixers (AREA)
- Control Of Non-Electrical Variables (AREA)
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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US10/552,308 US7810988B2 (en) | 2003-04-07 | 2004-04-07 | Fluid mixer for mixing fluids at an accurate mixing ratio |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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JP2003-103503 | 2003-04-07 | ||
JP2003103503A JP4512913B2 (ja) | 2003-04-07 | 2003-04-07 | 流体混合装置 |
Publications (1)
Publication Number | Publication Date |
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WO2004094053A1 true WO2004094053A1 (ja) | 2004-11-04 |
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ID=33307908
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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PCT/JP2004/005051 WO2004094053A1 (ja) | 2003-04-07 | 2004-04-07 | 流体混合装置 |
Country Status (4)
Country | Link |
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US (1) | US7810988B2 (ja) |
JP (1) | JP4512913B2 (ja) |
CN (1) | CN100500274C (ja) |
WO (1) | WO2004094053A1 (ja) |
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- 2004-04-07 WO PCT/JP2004/005051 patent/WO2004094053A1/ja active Application Filing
- 2004-04-07 US US10/552,308 patent/US7810988B2/en not_active Expired - Fee Related
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Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7377685B2 (en) * | 2002-08-21 | 2008-05-27 | Endress + Hauser Flowtec Ag | Apparatus and process for mixing at least two fluids |
US8282265B2 (en) | 2002-08-21 | 2012-10-09 | Endress + Hauser Flowtec Ag | Apparatus for mixing at least two fluids in a pulsating manner |
Also Published As
Publication number | Publication date |
---|---|
CN100500274C (zh) | 2009-06-17 |
US20060285429A1 (en) | 2006-12-21 |
JP2004305925A (ja) | 2004-11-04 |
JP4512913B2 (ja) | 2010-07-28 |
CN1767891A (zh) | 2006-05-03 |
US7810988B2 (en) | 2010-10-12 |
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