JP2011161401A - Agitator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an agitator which has only an agitation action, but no solution sending action in the agitator agitating a liquid between a disk-like rotor and stator. <P>SOLUTION: The agitator comprises a cylindrical housing 10, the rotor 30 and the stator 20 arranged in the housing 10, a rotary shaft 40 arranged at an axis position of the housing, a motor 50 communicating with the rotary shaft 40 and the like. An inflow chamber 15 is formed between an end plate 12 and a stator 20 (20a) of the bottom step, and an outflow chamber 16 is formed between an end plate 13 and a stator 20 (20c) of the top step. An inflow opening 14 communicating with the inflow chamber 15 and an outlet 17 communicating with the outflow chamber 16 are provided on a cylindrical part 11 of the housing. An opening 21 is provided on the central part of the stator 20. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a stirring device for stirring a fluid such as a liquid, and particularly to a stirring device suitable for use in dissolving or diluting a water-soluble polymer such as a polymer flocculant in water. More specifically, the present invention relates to a stirring device in which a rotor and a stator are disposed in a housing and the rotor is rotated.

  Dispersion and dissolution of powdered polymer flocculants, dissolution of emulsion-type polymer flocculants, dispersion and dissolution of liquid polymer flocculants, dispersion and dissolution of dispersion-type polymer flocculants, and other high and low viscosity liquids Is mixed in the flow path by a line mixer. In this line mixer, since the polymer flocculant is mixed with water using only the flow rate (pressure) in the pipe as a power source, stirring is insufficient.

  JP-T-2004-537402 describes a mixing apparatus in which a fixed disk and a movable disk are arranged in a housing with a space between them, and the movable disk is rotated to perform stirring and liquid feeding. . The liquid is fed by centrifugal force generated by the rotation of the movable disk. A prismatic protrusion is provided on the plate surface of each disk, and fluid collides with the protrusion and is mixed.

Special table 2004-537402

  The mixing device of the above-mentioned special table 2004-537402 has both functions of mixing and liquid feeding. Therefore, when the number of rotations of the mixing device is increased or decreased to increase or decrease the liquid feeding amount, the mixing efficiency itself also varies.

  In the above special table 2004-537402, since a prismatic pin is erected on each disk, when the disk is rotated at high speed, the polymer polymer chain component is divided at the corner edges of the pin, and the solute There is a risk of changes in the properties.

  The present invention solves the above problems, and provides an agitating device that agitates liquid between a disk-shaped rotor and a stator, and has an agitating action only and does not have a liquid feeding action. Objective.

  Another object of the present invention is to provide an agitation device that prevents or suppresses the polymer chain fragmentation even when the rotor is rotated at a high speed.

  A stirrer according to the present invention (Claim 1) includes a cylindrical housing, disc-shaped rotors and stators arranged alternately in the housing at intervals in the axial direction of the cylinder, and the housing. The stator includes an introduction portion provided on one end side and a discharge portion provided on the other end side of the housing, and the stator has an outer peripheral portion connected to the inner peripheral surface of the housing and has an opening in the center portion. A rotating shaft is disposed in the axial direction of the housing, and the rotor is supported by the rotating shaft, an odd number of the stators are disposed, and a rotor is disposed between the stators. In addition, the opening of the stator on one end side in the cylinder axis direction of the housing is an introduction portion, and the opening of the stator on the other end side is a discharge portion.

  According to a second aspect of the present invention, there is provided the agitation apparatus according to the first aspect, wherein an inflow chamber is provided between the end surface on one end side in the cylinder axis direction of the housing and the nearest stator, and the end surface on the other end side and the nearest stator. An outflow chamber is provided between the housing and an inflow port that faces the inflow chamber and an outflow chamber that faces the outflow chamber.

  According to a third aspect of the present invention, there is provided the stirring device according to the second aspect, wherein the inlet and the outlet are provided on an outer peripheral surface of the housing.

  According to a fourth aspect of the present invention, there is provided the stirring device according to any one of the first to third aspects, wherein a plurality of pins project from the stator and the rotor toward the opposing rotor and the stator, and each pin is a stator or a rotor. The pins are arranged concentrically with respect to the center of the rotor, and each pin has a substantially cylindrical shape or a substantially elliptical column shape.

  According to a fifth aspect of the present invention, there is provided the stirring device according to any one of the first to fourth aspects, further comprising a pump for supplying the fluid to be stirred into the stirring device.

  For example, when a plurality of types of liquids are mixed by the stirring device of the present invention, these liquids are introduced into the housing from the inlet through the pump, and the rotor is rotated. The liquid is agitated between the rotor and the stator. As the rotor rotates, the liquid in the housing swirls to generate centrifugal force. However, since the introduction part and the discharge part are located at the center of the stator, the liquid in the housing is directed from the introduction part to the discharge part. There is no flow in (or the opposite direction). The liquid in the housing flows from the introduction part to the discharge part exclusively by the discharge pressure of the pump. Therefore, even if the number of rotations of the rotor is changed to control the stirring force, the amount of liquid fed by the pump does not vary.

  In the stirring device according to claim 2, an inflow chamber is provided between an end face on one end side in the cylinder axial direction of the housing and the nearest stator, and an outflow chamber is provided between the end face on the other end side and the nearest stator. Since the housing is provided with an inlet facing the inflow chamber and an outlet facing the outflow chamber, respectively, the swirling flow of the liquid generated by the rotation of the rotor is generated at the inlet and the outlet. And the liquid flow becomes stable. By providing the inlet and the outlet on the outer peripheral surface of the housing as in the third aspect, this effect becomes remarkable.

  According to the fourth aspect of the present invention, the stirring force is improved by providing pins on the rotor and the stator. By making this pin into a substantially cylindrical shape or a substantially elliptical cylinder shape, even if the rotor is rotated at a high speed, the shearing force that the pin gives to the polymer chain of the polymer component is small, preventing the polymer polymer chain from being broken. Or suppressed. Therefore, for example, deterioration of the characteristics of the polymer flocculant is prevented.

It is a longitudinal cross-sectional view of the stirring apparatus which concerns on embodiment. (A) is a perspective view of a stator, and (b) is a plan view of the stator. FIG. 3 is a flow diagram of a lysis or dilution system.

  Hereinafter, with reference to FIGS. 1 to 3, a stirring device and a dilution system using the stirring device according to the embodiment will be described.

  As shown in FIG. 1, the stirring device includes a cylindrical housing 10, a stator 20 and a rotor 30 disposed in the housing 10, a rotating shaft 40 disposed at an axial center position of the housing, and the rotating shaft 40. The motor 50 etc. which are connected to are provided.

  The housing 10 includes a cylindrical portion 11, a lower end plate 12, and an upper end plate 13. As in this embodiment, the housing 10 preferably has a cylindrical axis center in the vertical direction, but the axis direction may be horizontal or diagonal. An inflow chamber 15 is formed between the lower end plate 12 and the lowermost stator 20 (20a), and an outflow chamber 16 is formed between the upper end plate 13 and the uppermost stator 20 (20c). ing. An inflow port 14 communicating with the inflow chamber 15 and an outflow port 17 communicating with the outflow chamber 16 are provided in the cylindrical portion 11 of the housing.

  An odd number (three in FIG. 1) of stators 20 (20a, 20b, 20c) are arranged in the housing 10. Each stator 20 has a disk shape having an opening 21 at the center, and the outer peripheral edge is fixed to the inner peripheral surface of the housing 10 by welding or the like. In this embodiment, the diameter of the opening 21 of each stator 20 is the same. The opening 21 (21a) of the lowermost stator 20a is an introduction part, and the opening 21 (21c) of the uppermost stator 20c is a discharge part.

  Pins 22, 23, or 24 are provided upright on the upper surface of the lowermost stator 20a, the lower surface of the uppermost stator 20c, and the upper and lower surfaces of the intermediate stator 20b, respectively. As shown in FIG. 2, the pins 22 on the upper surfaces of the stators 20 a and 20 b are located at an equal radius from the axis of the housing 10, and are arranged at regular intervals in the circumferential direction along the periphery of the opening 21. Yes. Further, the pins 23 are located at an equal radius from the axis of the housing 10 and are arranged at regular intervals in the circumferential direction near the outer peripheral edges of the upper surfaces of the stators 20a and 20b. The pins 24 on the lower surfaces of the stators 20b and 20c are located at an equal radius from the axial center of the housing 10, and are arranged at regular intervals in the circumferential direction substantially in the middle between the periphery of the opening 21 and the outer periphery of each stator 20b and 20c. Has been.

  A rotary shaft 40 is inserted through the openings 21 of the stators 20b and 20c, and a rotor 30 (30a and 30b) is attached to the rotary shaft 40. The rotating shaft 40 is rotatably supported by the housing 10 via a bearing 41. The rotating shaft 40 extends outside the housing 10 through the upper end plate 13.

  The rotor 30a is located between the stators 20a and 20b, and the rotor 30b is located between the stators 20b and 20c. The diameter of each rotor 30 is smaller than the inner diameter of the housing 11, and there is a gap through which fluid passes between the outer periphery of the rotor 30 and the inner peripheral surface of the housing 11. There is also a predetermined gap between the plate surface of each rotor 30 and each stator 20. The height of the gap above and below the rotor 30 is substantially equal.

  A plurality of pins 31 and 32 are erected on the upper surface of the rotor 30, and a plurality of pins 33 are erected on the lower surface. Each pin 31 is located at an equal radius from the rotary shaft 40 and is disposed at a constant interval in the circumferential direction. Each pin 32 is also located at an equal radius from the rotating shaft 40 and is disposed at a constant interval in the circumferential direction. Each pin 33 is also located at an equal radius from the rotary shaft 40 and is arranged at a constant interval in the circumferential direction.

  In this embodiment, the pin 31 and the pin 22 are located at an equal radius from the axis of the housing 10. The pin 32 and the pin 23 are located at an equal radius from the axis of the housing 10. The pin 33 and the pin 24 are located at an equal radius from the axis of the housing 10. When the rotary shaft 40 rotates, the pin 33 circulates between the circumferential row of the pins 22 and the circumferential row of the pins 23, and the pin 31 circulates on the inner peripheral side of the circumferential row of the pins 24. The pin 32 circulates on the outer peripheral side of the circumferential row of the pins 24.

  In the stirring device 1 configured as described above, for example, when a plurality of types of liquids are mixed, these liquids are supplied into the inflow chamber 15 from the inlet 14 via the pump 62 and the inflow line 63, and Each rotor 30 is rotated by a motor 50. This liquid flows from the inflow chamber 15 between the opening 21 of the stator 20a, between the stator 20a and the rotor 30a, between the outer periphery of the rotor 30a and the inner peripheral surface of the housing 10, between the rotor 30a and the stator 20b, and between the stator 20b. Opening 21, between stator 20 b and rotor 30 b, between rotor 30 b and inner peripheral surface of housing 10, between rotor 30 b and stator 20 c, opening 21 of stator 20 c, outflow chamber 16, and outlet 17. Flow and sent out to take-out line 64.

  Since each rotor 30 and the stator 20 are provided with pins 31 to 33 and 22 to 24, shearing stress is applied to the liquid as the rotor 30 rotates, and the liquid is sufficiently stirred.

  As the rotor 30 rotates, the liquid in the housing 10 turns, so that centrifugal force is applied to the liquid in the housing. However, the opening 21a as the introduction portion and the opening 21c as the discharge portion are the axial centers of the housing 10. Therefore, the liquid in the housing 10 does not flow in the direction (or the opposite direction) from the opening 21a as the introduction portion to the opening 21b as the discharge portion. The liquid in the housing 10 flows from the inlet 14 toward the outlet 17 exclusively by the discharge pressure of the pump 62. Therefore, even if the rotational speed of the rotor 30 is varied to control the stirring force, there is no or little variation in the amount of liquid fed by the pump 62 (the amount of liquid passing through the housing 10).

  Moreover, since each pin 22-24, 31-33 is cylindrical shape, even if it rotates the rotor 30 at high speed, the shear force which the pins 22-24, 31-33 give to the polymer chain of a polymer component is small, and polymer It is prevented or suppressed that the polymer chain is broken. Therefore, for example, deterioration of the characteristics of the polymer flocculant is prevented.

  In this embodiment, the inflow chamber 15 is provided on the lower side of the stator 20a, the outflow chamber 16 is provided on the upper side of the stator 20c, and the inlet 14 and the outlet 17 are provided on these side peripheral surfaces. The effect of the swirling flow generated between the stator 20 and the stator 20 hardly reaches the inlet 14 and the outlet 17, and the liquid flows stably.

  An example of an apparatus for dissolving a liquid polymer (polymer) flocculant (hereinafter sometimes referred to as a stock solution) in water using the thus configured stirring apparatus 1 will be described with reference to FIG.

  FIG. 3 (a) shows a flow when the opening degree of the flow rate adjusting valve 66 is increased and the amount of chemical injection is increased. Water flows through the ball valve 60, the water supply line 61, the water supply pump 62, and the line 63. And supplied to the inlet 14 of the stirring device 1. The stock solution is supplied to the water supply line 61 (that is, the suction side of the pump 62) via the ball valve 80, the stock solution pump 81, the line 82, the three-way valve 83, and the line 84. The stock solution and water are stirred to form a solution by the stirring device 1, and this solution is taken out via the take-out line 64, the flow rate is measured by the flow meter (FS) 65, the flow control valve (FCV) 66, the line 67. Then, it is added to the agglomeration processing equipment through the electric valve 68, the line 69, and the valve 70.

  FIG. 3 (b) is a flow when the amount of chemical injection is reduced by reducing the opening degree of the flow control valve 66, and a part of the solution from the stirring device 1 is returned to the return line 71 branched from the line 64 and The water is returned to the water supply line 61 through the valve 72.

  3 (a) and 3 (b), the three-way valve 83 communicates with the lines 82 and 84, and the line 85 is disconnected from the lines 82 and 84. The valve 74 is closed. Even if the number of rotations of the motor 50 is changed (increase / decrease) in the state of FIGS. The intensity of stirring can be adjusted without any problems.

  In the flow of FIG. 3 (c) in which the chemical injection is stopped, the three-way valve 83 communicates the lines 84 and 85 and the line 82 is disconnected from the lines 84 and 85. As a result, the stock solution is not added to the feed water, but only water is circulated through the loop of the pump 62 and the lines 63, 85, 84, 61. This is to prevent solidification due to stagnation in the lines 84, 61, 63 and the pump 62 in a state where the stock solution does not sufficiently dissolve with water. In general, when diluting a polymer with dilution water, if the polymer concentration in the chemical injection after dilution is excessively high, a polymer gel-like substance is generated during the chemical injection, and this gel-like substance is generated in the mixer or piping. In this case, the piping is blocked. According to this embodiment, such a situation is prevented.

  A drain line 73 branches from the line 67, and an electric valve 74 and a valve 75 are provided in the drain line 73. Water is supplied even when the chemical injection is stopped, the electric valve 68 is closed, and the electric valve 74 and the valve 75 are opened, whereby the liquid upstream of the line 67 is discharged out of the system via the drain line 73.

The detection signal of the flow meter 65 is input to the control panel 90. Further, a signal from the control panel 90 is given to the inverter controllers 62a and 81a of the pumps 62 and 81, and the rotational speeds of the pumps 62 and 81 are controlled. The three-way valve 83, the flow rate adjusting valve 66, and the electric valves 68 and 74 are also controlled to be opened / closed or opened by signals from the control panel 90.
Thus, by controlling the rotation speed of the pump 62 and the opening degree of the electric valve 68 by the signal from the control panel 90, it becomes possible to control the flow rate with the maximum capacity of the pump 62 as the upper limit. .

  According to the stirring device of this embodiment, the following various effects can be obtained in addition to the above.

  The dissolution tank is unnecessary or downsized, and the installation space can be reduced.

  All the motor power is used for agitation. Since the stirring power is strong, the dispersion of the polymer flocculant is good.

  Since there is no pump effect, it can be installed in the middle of existing piping.

  Since there is no pump effect, it is possible to install a plurality of stirring devices in multiple stages as required.

  The pump unit for controlling the flow rate and the agitation unit for controlling the agitation force can be controlled independently, and the injection control under the optimum conditions is possible according to the properties of the stock solution and the injection conditions.

  Dissolution under high pressure conditions is also possible, and dissolution time can be shortened.

  It can be used widely as an in-line type dissolution apparatus not only for emulsion polymers but also for food and chemical fields. It is also possible to mix and disperse powders that are difficult to disperse in water, such as diatomaceous earth and powdered activated carbon.

The above embodiment is an example of the present invention, and the present invention may have a configuration other than that illustrated. For example, the number of rotors and stators may be other than shown. Further, the pin is not limited to a cylindrical shape, and may be an elliptical cylindrical shape or a shape similar to them. The outer peripheral edge of the rotor and the inner peripheral edge of the stator may be chamfered. The number of pin rows is not limited to that shown in the figure.
Further, the apparatus shown in FIG. 3 can also be used as an apparatus for dissolving various chemicals and mixing and dispersing powders and slurries regardless of the aggregating agent dissolving apparatus.

DESCRIPTION OF SYMBOLS 1 Stirring apparatus 10 Housing 11 Cylindrical body 12, 13 End plate 14 Inlet 15 Inlet chamber 16 Outlet chamber 17 Outlet 20 (20a, 20b, 20c) Stator 21 (21a) Opening (introduction part)
21 (21b) Opening 21 (21c) Opening (discharge part)
22-24 pin 30 (30a, 30b) rotor 31-33 pin 40 rotating shaft 50 motor 62, 81 pump

Claims (5)

A tubular housing;
In the housing, disk-shaped rotors and stators arranged alternately at intervals in the cylinder axis direction of the housing;
An introduction portion provided on one end side of the housing;
A discharge portion provided on the other end side of the housing,
The stator has an outer peripheral portion connected to the inner peripheral surface of the housing, and has an opening in the center.
In a stirring device in which a rotating shaft is disposed in the axial direction of the housing and the rotor is supported by the rotating shaft,
An odd number of the stators are arranged, and a rotor is arranged between the stators,
The stirrer characterized in that the opening of the stator on one end side in the cylinder axis direction of the housing is an introduction portion, and the opening of the stator on the other end side is a discharge portion. 2. The inflow chamber is provided between an end face on one end side in the cylinder axis direction of the housing and the nearest stator, and an outflow chamber is provided between the end face on the other end side and the nearest stator. And
An agitation device characterized in that an inlet facing the inflow chamber and an outlet facing the outflow chamber are provided in the housing.   The stirring device according to claim 2, wherein the inlet and the outlet are each provided on an outer peripheral surface of the housing. In any 1 paragraph of Claims 1 thru / or 3, A plurality of pins are projected from the stator and rotor toward the rotor and stator which are opposite, respectively.
Each pin is arranged concentrically with respect to the center of the stator or rotor,
Each pin is a substantially cylindrical shape or a substantially elliptic cylinder shape, The stirring apparatus characterized by the above-mentioned.   The stirring device according to any one of claims 1 to 4, further comprising a pump for supplying the fluid to be stirred into the stirring device.

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