JP3184729B2 - Mixing and melting equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mixing and dissolving apparatus,
More particularly, the present invention relates to a mixing and dissolving apparatus for continuously mixing and / or dissolving a mixture such as powder in a liquid.

[0002]

2. Description of the Related Art Conventionally, as a device for mixing and dissolving a liquid and an object to be mixed, there is a batch type mixing and dissolving device as shown in FIG. The batch type means that a predetermined amount of liquid 200 is temporarily stored in a tank 202, a predetermined amount of the mixture 204 is put into the liquid 200, and a propeller-shaped rotary stirring unit 208 of a stirring device 206 is rotated. It is a method of mixing and dissolving by stirring. According to the batch-type mixing and dissolving apparatus, a predetermined amount of the liquid 200 and a predetermined amount of the to-be-mixed substance 204 can be reliably introduced into the tank. Therefore, if the mixture 204 is uniformly mixed and dissolved in the liquid 200, a liquid in which the mixture is mixed and dissolved at a fixed ratio can be obtained. A tap 212 shown in FIG. 11 is opened when the liquid 200 is supplied. Also, 21
Reference numeral 4 denotes a valve which opens when the liquid to be mixed and discharged is discharged.

[0003]

However, in the above-mentioned batch-type mixing and dissolving apparatus, the time for temporarily storing the liquid 200 in the tank 202 and the mixing and dissolving of the substance to be mixed are described.
Since time is required for discharging the dissolved liquid, there has been a problem that time efficiency is poor. In addition, especially when the mixture is a powder such as an aggregating agent, it takes time to simply disperse a large amount of powder into the liquid at once, and the mixture is uniformly mixed. -In order to dissolve, the stirring time becomes long. Furthermore, in order to mix and dissolve efficiently, a tank having a size corresponding to the tank is required, and there is a problem that the entire apparatus becomes large.

[0004] In particular, when the mixture is a powder such as a flocculant, a large amount of the powder added to the liquid at one time is difficult to be suitably dispersed in the liquid, and a cage easily occurs. Therefore, in reality, there is a problem that the mixture 204 cannot be uniformly mixed and dissolved in the liquid 200. Once the powder is in this state, the powder can be easily mixed and
Cannot dissolve. Mamako had to be scooped and discarded, wasting the flocculant. In order to carry out mixing without leaving a cage, it is necessary to mix the liquid stored in the tank 202 while adding the powder in small portions, which is time-consuming. Further, the rotary stirring section 208 of the stirring device 206 is connected to the liquid 20 via the shaft section 210.
0, so that the shaft 210
The cage-like mixture may be entangled and grow into this large mass as it is. For this reason, the subject to be mixed cannot be appropriately mixed and dissolved in the liquid, and the mixing and dissolution ratio cannot be properly controlled.

Accordingly, an object of the present invention is to provide a mixing and dissolving apparatus that can uniformly and efficiently mix and dissolve a mixture so that a mixture does not suffer from danger in a liquid in a short time.

[0006]

The present invention has the following arrangement to achieve the above object. That is, the present invention provides a tank capable of storing a liquid, a first supply device for continuously supplying a desired amount of water into the tank, and a powdery polymer positioned above the tank. a second supply device having a charging port for continuously charged with a desired amount of flocculant in the tank, and the water supplied to the tank of the powder
A stirring device for stirring the polymer flocculant in the tank
The polymer coagulant of the powder is not mixed and dissolved in the water.
That a flocculant solution, and a discharge device for continuously discharged, before
Water and the supply amount of the polymer flocculant of the powder and the flocculant
Mixed solution controlled to match the amount of liquid discharged
A dissolving device, wherein the second supply device is configured to disperse the powder
Hopper for storing a coagulant for supply to the inlet
And a dry air supply device for supplying dry air into the hopper.
And an inclined surface on at least a part of the inner surface of the hopper.
Surface is provided, and the dry air supply device supplies dry air.
Formed to squirt downward along the slope,
Inside the tank including the inclined surface, polymer of the powder
Teflon coating to prevent coagulant adhesion
Have .

[0007] Further , the present invention relates to storing a liquid.
And a continuous flow of water into the tank in the desired volume
A first supply device for supplying to the tank and a position above the tank
And the polymer coagulant of the powder is continuously supplied in the desired amount in the tank.
A second supply device having an input port for charging
Water and the powdered polymer flocculant supplied into the
A stirring device for stirring, and the powder in the water in the tank
The coagulant liquid obtained by mixing and dissolving the polymer coagulant
A discharge device for continuously discharging the water and the powder.
Between the supply amount of the polymer flocculant and the discharge amount of the flocculant liquid.
A mixing and dissolving apparatus that is controlled to perform
The second supply device feeds the polymer coagulant of the powder to the e.
A discharge mechanism for continuously discharging a desired amount from the
The polymer flocculant of the powder discharged by the discharge mechanism is
Blow off with dry air and into the tank from the inlet
Dry air that blows dry air into the inlet to be injected
And a feeder having an air ejection mechanism.
The discharge mechanism is configured to allow the polymer aggregation of the powder from the hopper.
Supply port for receiving the powder and the polymer flocculant of the powder
A cylindrical book with a discharge port on the peripheral wall for discharging to the mouth
The body is inserted into a hollow portion formed in the cylindrical main body and rotated.
It is fitted inside so that it can be slid
The polymer flocculant of the powder supplied as above is transported to the outlet.
A rotating body provided with a concave portion, and a rotating body in front of the rotating body.
Adhesion of the polymer flocculant of the powder to the periphery including the dent
Teflon coating to prevent dents
Dry air is blown to the part by the dry air ejection mechanism
There is also a mixing and dissolving apparatus characterized in that it can be melted.

[0008] The present invention also relates to storing a liquid.
And a continuous flow of water into the tank in the desired volume
A first supply device for supplying to the tank and a position above the tank
And the polymer coagulant of the powder is continuously supplied in the desired amount in the tank.
A second supply device having an input port for charging
Water and the powdered polymer flocculant supplied into the
A stirring device for stirring, and the powder in the water in the tank
The coagulant liquid obtained by mixing and dissolving the polymer coagulant
A discharge device for continuously discharging the water and the powder.
Between the supply amount of the polymer flocculant and the discharge amount of the flocculant liquid.
A mixing and dissolving apparatus that is controlled to perform
Empty the tank so that moisture does not accumulate in the tank.
A ventilation system for ventilating the air.
There is also a fusion device. According to the above invention, the powder
The coagulant is coagulated and coagulated
Uniform coagulant liquid that can be reliably supplied into the tank
Can be obtained efficiently.

Further , the present invention provides a method for storing a liquid.
And a continuous flow of water into the tank in the desired volume
A first supply device for supplying to the tank and a position above the tank
And the polymer coagulant of the powder is continuously supplied in the desired amount in the tank.
A second supply device having an input port for charging
Water and the powdered polymer flocculant supplied into the
A stirring device for stirring, and the powder in the water in the tank
The coagulant liquid obtained by mixing and dissolving the polymer coagulant
A discharge device for continuously discharging the water and the powder.
Between the supply amount of the polymer flocculant and the discharge amount of the flocculant liquid.
A mixing and dissolving apparatus that is controlled to perform
A secondary mix that mixes and dissolves the flocculant liquid more uniformly
And a flocculant mixed and dissolved in the tank
The tank to send liquid to the secondary mixing device.
Connected as the discharging device between the secondary mixing devices
And a mixed tube pump
There is also a melting device.

[0010] The secondary mixing device may be a mortar.
Tapered inner surface and frusto-conical shaped front
Outside the taper that rotates so as to fit against the inner surface of the taper
And a surface of the powder that is present in the flocculant liquid.
Mixing and dissolving the coagulant as if it were ground
Mix the powder polymer flocculant with water more uniformly and efficiently
・ Can be dissolved.

[0011]

According to the mixing and dissolving apparatus of the present invention, a liquid
A certain water and a powdery polymer flocculant to be mixed are mixed with the first
By the supply device and the second supply device, a desired amount can be continuously supplied into the tank, and agglomerated by mixing and dissolving a powdery polymer flocculant in water by stirring in the tank.
The liquid medicine can be continuously and suitably discharged by the discharge device. Therefore, water and powder can be mixed under certain desired conditions.
Polymer flocculant can be continuously mixed and dissolved, flour in water
The polymer coagulant of the body can be uniformly mixed and dissolved. Moreover, since it is possible to supply the powder of the polymer flocculant at a constant small portions continuously water, it can be suppressed Mamakono generation causes the powder of the polymer flocculant is preferably mixed and dissolved in water be able to.

And supply of water and a powdery polymer flocculant ;
And liquid der the powder of the polymeric coagulant is mixed and dissolved
Since the coagulant liquid is continuously discharged, water (coagulant
Liquid) , the time to discharge the flocculant liquid , and the time when a large amount of the polymer flocculant is charged.
The time required for dispersing the polymer flocculant is not required. For this reason, time efficiency can be improved, and the powder
A desired amount of the coagulant liquid in which the molecular coagulant is mixed and dissolved can be obtained in a short time.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below in detail with reference to the accompanying drawings. 1 to 4 show an embodiment of the mixing and dissolving apparatus according to the present invention. This embodiment is an example of one used for treating industrial wastewater and / or domestic wastewater. A liquid (hereinafter, referred to as a flocculant liquid) in which a flocculant (powder polymer flocculant ), which is a mixture, is mixed and dissolved by the mixing and dissolving apparatus (hereinafter, referred to as a flocculant liquid) is temporarily stored in a storage tank, and then introduced into a flocculation tank. Into the wastewater and react with the wastewater. Then, the waste water mixed and reacted with the coagulant liquid is introduced into a sedimentation tank. The tap water is discharged, and the sediment settled in the settling tank is discharged in a dehydrated state (cake) by a dehydrator.
Some dehydrators utilize centrifugal separation. In general, the concentration of the flocculant solution is about 0.1 to 0.5% by weight.

The coagulant used in this way is a chemical for assembling fine particles suspended in water to form a large aggregate. Examples of the coagulant include a sulfate band,
There are inorganic polyvalent salts such as ferric chloride and polymer substances.
Further, the flocculant is dissolved in water and is roughly classified into a cation indicating a positive ion, an anion indicating a negative ion, and a nonion indicating neutrality. As a component of the cation,
There are polymethacrylic ester type, cationically modified product of polyacrylamide, diallyl type, chitosan, polyamine type and dicyanedianed type. Anionic components include sodium polyacrylate. As a nonionic component, there is a polyacrylamide type.

The flocculant acts to aggregate the particles in the liquid to form a large aggregate, thereby increasing the sedimentation velocity of the particles and making the particles easier to filter. This coagulant is difficult to dissolve in water, and when dissolved in water, it is necessary to disperse and supply it as it is in order to prevent this occurrence.In the atmosphere, it is easy to form a lump by moisture, and the melting time is affected by the water temperature, The liquid has a characteristic that it has a viscosity and draws a thread.

FIG. 1 is an explanatory view (flow sheet) for explaining an embodiment of the system of the mixing and dissolving apparatus according to the present invention. 2 is a side view showing a specific example of the system of FIG. 1, FIG. 3 is a front view of the embodiment of FIG. 2, and FIG. 4 is a plan view of the embodiment of FIG. Reference numeral 10 denotes a tank which can store a liquid (water 12 in this embodiment). It is formed in a plane hexagon and is installed in an inclined state. Reference numeral 14 denotes a first supply device, which continuously supplies the water 12 into the tank 10 in a desired amount. It is connected to the water supply 15, and a valve 17 for opening and closing the conduit 16, the constant flow valve 18 which acts to direct the flow of water constant.

Reference numeral 20 denotes a second supply device, which is located above the tank 10 and continuously feeds a desired amount of the coagulant 22 as a mixture (powder polymer coagulant) into the tank 10. It has an inlet 24. An inlet 24 for the coagulant 22
Is provided eccentrically from the center of the tank 10. Thereby, the coagulant 22 can be supplied to a suitable position for mixing and dissolving in the water 12, and the efficiency of mixing and dissolving can be improved.

The second supply device includes a coagulant 22
And a dry air supply device 28 for supplying dry air into the hopper 26. This dry air supply device 2
8 (see FIG. 2) has an ejection port formed so as to eject dry air downward along the inclined inner surface of the hopper 26, and includes a dry air generating section 30 for supplying dry air to the ejection port. . The dry air generator 30 includes a dry generator 31 connected to a compressed air source 33, and a regulator 32 that adjusts the amount of dry air discharged from the dry generator 31 and supplied to the ejection port. . As the dry generator 31, a moisture adsorbent such as silica gel, or a dryer that removes moisture by using a pressure change and a temperature change can be used. In the present embodiment, a device using a hollow fiber membrane is used. I have. Thereby, the size of the device can be reduced.

Reference numeral 34 denotes a feeder, which discharges the coagulant 22 continuously from the hopper 26 in a desired amount;
In order to blow the flocculant 22 discharged into the input port 24 by the discharge mechanism with dry air and to input the coagulant 22 into the tank 10, a dry air jetting mechanism 36 for jetting dry air into the input port 24 is provided. This dry air ejection mechanism 36
Is provided with a nozzle for ejecting dry air into the inlet 24 and a dry air generator 30 for supplying dry air to the nozzle. The dry air generator 30 also supplies dry air to the dry air supply device 28, and is also used. By supplying the dry air into the hopper 26 and the inlet 24 in this manner, the coagulant 22 can be surely supplied to the water 12 stored in the tank 26 by a fixed small amount without coagulation. .

Reference numeral 38 denotes a stirring device, which has stirring blades 40 which are rotated by the power of a motor 39 at the bottom of the tank 10. The water 12 and the coagulant 22 supplied into the tank 10 by the stirring blades 40 are used. Is stirred. Since the stirring blades 40 are located at the bottom, there is a problem that the litter-like mixture is entangled on the shaft portion as in the prior art shown in FIG. Does not happen. Reference numeral 42 denotes a water level detection device, which is provided with the water 12 and the coagulant liquid 43 (the coagulant 22 is mixed
The amount of (dissolved water) is detected by its liquid level (liquid level). When the liquid level exceeds the upper limit or the lower limit, the first supply device 14 and the second supply device 20 or the discharge device (for example, a tube pump 46 described later) is controlled by a signal from the water level detection device 42. , Water 12 and the amount of coagulant 22 and the amount of coagulant liquid 43 discharged can be matched. It should be noted that controlling the discharge amount of the coagulant liquid 43 has the advantage that only the discharge device needs to be controlled, rather than controlling matching by controlling the input amounts of the water 12 and the coagulant 22. Reference numeral 45 denotes a ventilator, which is provided in the tank 10 to prevent moisture from entering the tank 10.
Ventilate the air inside. This prevents moisture in the tank 10 from entering the feeder 34 and the hopper 26 and solidifying the coagulant 22 due to the moisture.

Reference numeral 46 denotes a tube pump,
The water 12 in which the coagulant 22 is mixed and dissolved therein operates as a discharge device that discharges the water 12 in accordance with the amount supplied from the first supply device 14 and the second supply device 20. Thereby, the coagulant liquid 43 stirred in the tank 10 can be reliably discharged by a predetermined amount. In addition, tank 1
0 is connected via a drain pipe 48.

Numeral 50 denotes a secondary mixing device, which is provided in a continuous and double manner with a tube pump 46 via a pipe 52, and further uniformly mixes and dissolves the coagulant liquid 43 discharged by the tube pump 46. . The coagulant 22 can be more uniformly mixed and dissolved in the water 12. A drive motor 51 drives the secondary mixing device 50. Details of each secondary mixing device 50 will be described later. The coagulant liquid 43 that has passed through the secondary mixing device 50 is discharged to the processing tank 53.

Reference numeral 54 denotes a control panel, which controls the operation of each unit. Reference numeral 56 denotes a power supply, which supplies power to the control panel 54 and the devices of each unit via the control panel 54. 58
Is a supply signal, which is input by the user and is used to set control conditions and the like. 60 is the valve 1
7 is a wiring extending from a control panel 54 for opening and closing 7. Reference numeral 62 denotes wiring from the control panel 54 for operating the compressor 33. Reference numeral 64 denotes a wiring from the control panel 54 for controlling a motor 66 for driving the feeder 34. Reference numeral 68 denotes a wiring from the control panel 54 for controlling the motor 39 that drives the stirring blade 40 to rotate. Reference numeral 69 denotes wiring from a control panel for controlling the tube pump 46. 70 is a secondary mixing device 50
From the control panel 54 for controlling the control. Also,
A sensor 72 detects the amount of the coagulant 22, and a wiring 74 sends a signal detected by the sensor 72 to the control panel. Reference numeral 76 denotes wiring for sending a signal detected by the water level detection device 42 to the control panel.

Next, the operation and effect of the mixing and dissolving apparatus having the above configuration will be described. First, the water 12 and the coagulant 22 are supplied to the first supply device 14 and the second supply device 20.
Thus, the desired amount can be continuously supplied into the tank 10. Further, the aggregating agent 2 is stirred in the tank 10.
The coagulant liquid 43 in which 2 has been mixed and dissolved can be discharged by the tube pump 46 in accordance with the supply amounts of the water 12 and the coagulant 22 to the tank 10. in this way,
Since the supply of the water 12 and the coagulant 22 and the discharge of the coagulant liquid 43 are continuously performed, the time for storing the water 12, the time for discharging the coagulant liquid 43, and the amount of the coagulant 2
No time is required for dispersing the coagulant 22 when 2 is introduced. Therefore, the temporal efficiency can be improved, and a desired amount of the coagulant liquid 43 can be obtained in a short time. Also, aggregating agent liquid 43, it is possible to continuously discharge, efficiently in relation to the rear stroke, it can supply a flocculant solution 43. On the other hand, if the coagulant liquid is continuously discharged according to the prior art, since the batch type is used, two tanks or a container for storing the coagulant liquid is required, and the apparatus becomes complicated and large. Would. Further, since the tank 10 may be smaller than that of the conventional batch type, it can quickly enter a steady state. That is, there is also an advantage that the rise is quick.

Further, since the water 12 and the coagulant 22 can be continuously mixed and dissolved under certain desired conditions, the coagulant 22 can be uniformly mixed and dissolved in the water 12.
In the conventional batch method, water is once stored in a tank, and a desired amount of coagulant is mixed.If mixing and dissolution are ideally performed, an ideally uniform concentration of coagulant liquid can be obtained. it can. However, it is difficult to ideally mix and dissolve a substance that is hardly soluble in water, such as a coagulant, to a predetermined concentration as described in the section of the prior art. The concentration of the coagulant liquid 43 does not need to be strictly uniform due to its characteristics. Therefore, a coagulant liquid having a uniform concentration that can be sufficiently used can be obtained even in a method of continuously supplying and discharging as in this embodiment. In fact, a flocculant solution having a desired concentration can be obtained rather than the conventional batch type. this is,
Since the coagulant 22 can be continuously supplied (dispersed and supplied) to the water 12 by a fixed small amount, this can be suppressed as it is, and the coagulant 22 can be suitably mixed and dissolved in the water 12. It is. In addition, since this occurrence can be prevented as it is, there is an advantage that waste of the coagulant 22 can be eliminated.

Since the coagulant liquid 43 can be continuously discharged, the tank may be large enough to store a sufficient amount of water to uniformly mix and dissolve the coagulant. Since a particularly large tank is not required, downsizing can be realized and installation space can be reduced. Also, dry air is blown out, and the inside of the hopper 26, the feeder 34
And the inside of the inlet 24 is dried, so that the coagulant 22
Can be prevented from aggregating and clogging the aggregating agent 22 by a bridge or the like. The operation panel 78
Utilizes a sheet-like switch, which can prevent malfunction due to a dustproof and waterproof structure, and is also suitable in terms of design.

Next, the configuration of each section will be described in detail with reference to FIGS. First, the hopper 26 of FIG. 5 will be described. FIG. 5 is a side sectional view of the hopper 26, in which a lower portion 26a is formed in a mortar shape, and can store the coagulant 22 as a powder. The stored powdered coagulant 22 moves by the action of gravity along the inclined inner wall surface 80 and is supplied to the feeder 34 from the outlet 82. 84
Is a spout of dry air. This spout 84 is connected to a pipe 86
Connected to the dry air generator 30 (see FIG. 2). Reference numeral 90 denotes a lid, which is provided so as to be openable and closable about a shaft 92. 94 is a gasket. Thus, the hopper 26 is a closed container that supplies dry air and discharges the increased pressure to the atmosphere in order to reduce the humidity inside. Therefore, it is possible to prevent the flocculant 22 in the hopper 26 from condensing and bridging and being unable to be supplied from the hopper 26 to the feeder 34. In addition, the coagulant 22 can be prevented from hardening, and the coagulant 22 can be stored for a long time. The hopper 26 does not need to be a strictly closed container, and may be of such a degree that the inside of the hopper 26 can be maintained at an appropriate positive pressure by supplying dry air even if dry air leaks.

Further, as shown by an arrow 88, it is effective to prevent the bridging of the coagulant 22 in the tank 10 (especially the discharge port 82) by blowing dry air along the inclined inner wall surface 80. is there. That is, since the inclined inner wall surface 80, which is the moving surface of the coagulant 22, is kept in a suitably dried state, the adhesion of the coagulant 22 can be prevented, and the occurrence of a bridge can be prevented. Further, the inside of the tank, by a Teflon coating of the low friction-resistance surface to prevent adhesion of flocculant 22, discharge of the flocculant 22 is to be suitably performed.

Further, a buzzer and a lamp (not shown) for detecting the remaining amount of the coagulant 22 by the above-mentioned sensor 72 and receiving a signal from the sensor 72 to issue a warning of the remaining amount of the coagulant 22 are provided. ing. Since the size of the tank 10 can be reduced as described above, the entire apparatus can be formed small, and the height of the hopper 26 can be reduced. Therefore, the height at which the worker inputs the coagulant 22 can be set low, and workability can be improved.

Next, the feeder 34, which is a component of the second supply device 20, will be described with reference to FIGS. FIG. 6 is a longitudinal sectional view of the feeder, and FIG. 7 is a transverse sectional view of the feeder. Reference numeral 96 denotes a cylindrical main body, which has a hollow portion 98, is provided with a supply port 100 for receiving the flocculant discharged from the hopper 26 on the upper side, and discharges the flocculant 22 to a charging port on the lower side. Outlet 102 is provided. Reference numeral 104 denotes a conduit having an upper end connected to the outlet 102 and a lower end connected to the inlet 24 (see FIG. 8).

Reference numeral 106 denotes a rotating body, which is inserted into the hollow portion 98 and slidably fits on the inner peripheral wall 97 of the cylindrical main body 96 at a portion having an increased outer diameter. 1
). Indentations 108 (four in this embodiment) are provided on the outer periphery of the rotating body 106 at predetermined intervals. Therefore, by rotating the rotating body 106, the concave portion 1 is formed at the supply port 100.
The coagulant 22 that has entered 08 can be carried to the outlet 102.

Reference numeral 110 denotes a nozzle which is connected to a high-pressure dry air source and is fixed to a cylindrical main body 96.
From this nozzle 110, dry air can be ejected to the outlet 102 through a fine hole 112 provided in the cylindrical main body 96. According to this configuration, the coagulant 22 that has been conveyed to the outlet 102 can be blown off by the dry air ejected from the nozzle 110 and discharged to the inlet 24 side.

According to the feeder 34, the coagulant 22 can be continuously supplied little by little. That is, it can be dispersed and supplied, and this occurrence can be suppressed as it is. The coagulant liquid 4 is adjusted by adjusting the rotation speed of the rotating body.
3 can be adjusted. Also, the rotating body 1
The outer peripheral contact surface 114 which contacts the inner peripheral wall surface 97 of 06 by Teflon coating, thereby improving the wear resistance. Further, the Teflon coating is also applied to the recess 108 that functions to extract the coagulant 22, and when the recess 108 moves into the outlet 102, dry air is blown into the recess 108. by has a structure wear, you are possible to prevent adhesion of flocculant 22. Therefore, the coagulant can be supplied stably. Note that a stainless steel material may be used as the cylindrical main body 96 in order to improve corrosion resistance.

Next, the structure of the tank 10 will be described with reference to FIGS. 8 is a side sectional view of the tank, and FIG. 9 is a plan view of the tank in FIG. 8 (a plan view with the lid 116 removed). The tank 10 has a lid 116
The tip of the charging port 24 is inserted into the tank 10 through a hole provided in the lid 116. The input port 24 is formed of a resin material, is connected to the feeder 34, and has an opening 24a formed to face sideways. Resin material is used for moisture (particularly tank 1
This is because the material (moisture generated from the water 12 stored in the chamber 0) does not easily condense. The reason why the opening 24a is directed sideways is that the coagulant 22 is more diffused in the tank 1
It is for supplying within 0.

The inlet 24 for the coagulant 22 is connected to the tank 1
Offset from 0 center. Thereby, the coagulant 22 can be injected into a portion where the liquid has a complicated movement with a high flow velocity on the outer periphery of the vortex generated by the stirring blade 40, and the coagulant 22 can be efficiently stirred.

The tank 10 has a hexagonal shape when viewed from above, so that the water 12 and the coagulant 22 can be efficiently stirred. This is because the flow of the water 12 can be suitably stirred by the resistance of the corners. The shape of the tank 10 is not limited to the hexagon in the present embodiment, and may be formed in another polygon. When the tank 10 is circular when viewed from above, the stirring efficiency can be improved by attaching an appropriate baffle plate so as to disturb the water flow on the inner peripheral side wall surface.

Further, by slightly inclining the tank 10, it becomes possible to move the water in a complicated manner by slightly disturbing the balance of the eddy flow, and it is possible to perform efficient stirring,
Residues at the time of drainage can be reduced. Reference numeral 118 denotes a discharge port. Then, in order to obtain the above effects, the tank 10
Since only a slight inclination is required, the manufacturing cost can be reduced.

A hole 40a is formed in the stirring blade 40, and efficient stirring can be achieved by the action of turbulence generated when the hole 40a cuts through the water 12. Four stirring blades 40 are provided, and are rotationally driven by a motor 39.
The stirring blade 40 is provided to rotate at the bottom of the tank 10, and the rotation shaft 41 of the stirring blade 40 is inserted into the tank 10 from the bottom. Therefore, according to the present embodiment, there is no problem that the shaft is entangled with the shaft of the stirring blade as in the case where the conventional stirring blade 40 is immersed from above.

A heater (not shown) is wound around the outer periphery of the tank 10 to keep the tank 10 warm. This suppresses the occurrence of poor mixing and dissolution due to a decrease in water temperature in winter. In this respect, a throw-in type heater has been conventionally used, but there is a problem that a cage-like coagulant is entangled. Further, a ventilator 45 is provided on the lid 116 to ventilate the air in the tank 10 and prevent coagulant from condensing as described above.

The flocculant liquid mixed and dissolved in the tank 10 is discharged by a tube pump 46 (see FIG. 3) as a discharge device. With the use of the tube pump 46, the residue generated in the tank 10 can be suitably transferred to the next step. Also, by adjusting the rotation speed of the motor,
The discharge amount of the flocculant solution can be easily adjusted. If cooperative with said water level detector 42, the supply amount of water and flocculant, as described above, it can be easily matched emissions of flocculant solution.
The discharging device is not limited to the tube pump, and it is a matter of course that other means such as a gear pump can be used.

Next, the secondary mixing will be described.
Mixing and dissolving in the tank 10 as described above
This can be referred to as secondary mixing, and if it is necessary to mix and dissolve more uniformly, secondary mixing is performed. The colloid mill 120 in FIG. 10 is an embodiment of the secondary mixing device 50. FIG. 10 is a longitudinal sectional view of the colloid mill 120. In the mixing and dissolving apparatus of the present embodiment, two colloid mills 120 are used. However, one colloid mill 120 or three or more colloid mills may be required, and it may not be required at all depending on the use conditions.

Reference numeral 122 denotes a main body, the tip end portion of which is formed in a mortar shape, and has a tapered inner surface 126. 12
Reference numeral 8 denotes a rotating member.
22 is rotatably fitted through bearings 131 and 132. The distal end 134 is formed in a truncated cone shape so as to correspond to the tapered inner surface 126, and has a tapered outer surface 136. A sprocket 138 connected to a power source is attached to the rear end of the rotating member 128. Reference numeral 140 denotes a gasket, which is disposed between the main body 122 and the shaft 130 and seals the gasket. Also, 14
Reference numeral 2 denotes a coagulant liquid supply port, and 143 denotes a coagulant liquid outlet. According to the colloid mill 120, the coagulant liquid supplied from the coagulant liquid supply port 142 is mixed between the tapered inner surface 126 and the tapered outer surface 136 that rotates so as to be in contact with the taper inner surface 126, and is discharged. 143 is discharged. As a result, the rubbing is performed while remaining in the flocculant solution, and the crushing agent is mixed and dissolved in water.
In this way, the cage can be eliminated and the flocculant can be suitably dispersed. On more than has been variously described the preferred embodiments of the present invention, the present invention is not intended to be limited to the embodiments set above, to be subjected to many modifications without departing from the spirit of the invention, of course is there.

[0043]

According to the mixing and dissolving apparatus of the present invention,
Since desired certain water conditions and the powder of the polymer flocculant can be continuously mixed and dissolved, the powder of the polymer coagulation in water
The collecting agent can be uniformly mixed and dissolved. Also powder
For a polymer flocculant can be fed in a certain small portions continuously water, it can be suppressed Mamakono generation, the powder high
The molecular flocculant can be suitably mixed and dissolved in water. In addition, supply of water and powder polymer flocculant , and flocculation
Since the liquid agent is continuously discharged, a large tank is not required, and the time for discharging the flocculant liquid as in the conventional batch type is not required. Therefore, it is possible to obtain in a short period of time the desired amount of the coagulant solution. And the claims 1 to 3
According to the invention, the drying of the powdery polymer flocculant is maintained,
Without coagulating and adhering powder polymer flocculant,
A certain amount can be reliably supplied into the tank and uniform
Has a significant effect of being able to efficiently obtain
I do. According to the invention described in claims 4 and 5, the powder
Suitable secondary liquid for coagulant liquid containing solid polymer coagulant
Uniform flocculant liquid that can be transferred to the mixing device
Is obtained efficiently.

[Brief description of the drawings]

FIG. 1 is an explanatory view illustrating an embodiment of a system of a mixing and dissolving apparatus according to the present invention.

FIG. 2 is a side view showing an example of a specific embodiment of the system of FIG. 1;

FIG. 3 is a front view of the embodiment of FIG. 2;

FIG. 4 is a plan view of the embodiment of FIG. 2;

FIG. 5 is a side sectional view of the hopper according to the embodiment of FIG. 2;

FIG. 6 is a longitudinal sectional view of the feeder according to the embodiment of FIG. 2;

FIG. 7 is a cross-sectional view of the feeder according to the embodiment of FIG. 2;

FIG. 8 is a side sectional view of the tank according to the embodiment of FIG. 2;

FIG. 9 is a plan view of the tank according to the embodiment of FIG. 2;

FIG. 10 is a longitudinal sectional view of the secondary mixing device according to the embodiment of FIG. 2;

FIG. 11 is an explanatory diagram for explaining a conventional technique.

[Explanation of symbols]

 Reference Signs List 10 tank 12 water 14 first supply device 15 tap water 17 valve 18 constant flow valve 20 second supply device 22 coagulant 24 input port 26 hopper 28 dry air supply device 30 dry air generation unit 34 feeder 36 dry air ejection mechanism 38 stirrer 42 water level Detection device 43 Coagulant liquid 45 Ventilation device 46 Tube pump 50 Secondary mixing device 53 Processing tank

Continuation of the front page (51) Int.Cl. ⁷ Identification symbol FI B01F 15/02 B01F 15/02 C (56) References JP-A-50-119353 (JP, A) JP-A-62-208386 (JP, A) JP-A-52-138755 (JP, A) JP-A-5-49692 (JP, U) JP-A-5-1222827 (JP, U) JP-B-52-13125 (JP, B2) JP-B-Showa 60- 17672 (JP, Y2) (58) Fields investigated (Int. Cl. ⁷ , DB name) B01F 1/00 B01F 3/00-3/22 B01F ⁷ /00-7/32 B01F 15/00-15/06

Claims (5)

(57) [Claims] 1. A tank capable of storing a liquid, and a first tank for continuously supplying a desired amount of water into the tank.
A supply device, located above the tank, a second supply device having a charging port for continuously charged with a desired amount of powder of the polymer flocculant in the tank was fed to the tank the Water and polymer coagulation of the powder
And a stirring device for stirring the Atsumarizai, the powder flocculant solution polymer flocculant, which are mixed and dissolved in the water in said tank, and a discharge device for continuously discharged, the water And the supply amount of the polymer flocculant of the powder and the flocculation
Mixing controlled so that the discharge amount of the solution matches
A melting device, wherein the second supply device feeds the polymer coagulant in the powder.
A hopper for storing to supply to the inlet, and in the hopper
A dry air supply device for supplying dry air,
An inclined surface is provided on at least a part of the inner surface of the hopper,
The dry air supply device feeds dry air along the slope.
Before it includes the inclined surface
The adhesion of the polymer flocculant of the powder to the inside of the tank is prevented.
A mixing and dissolving apparatus having a Teflon coating for stopping . 2. A tank capable of storing a liquid, and a first tank for continuously supplying a desired amount of water into the tank.
A supply device, located above the tank, a second supply device having a charging port for continuously charged with a desired amount of powder of the polymer flocculant in the tank was fed to the tank the Water and polymer coagulation of the powder
And a stirring device for stirring the Atsumarizai, the powder flocculant solution polymer flocculant, which are mixed and dissolved in the water in said tank, and a discharge device for continuously discharged, the water And the supply amount of the polymer flocculant of the powder and the flocculation
Mixing controlled so that the discharge amount of the solution matches
A melting apparatus, the second supply device, and a discharge mechanism for continuously discharging the polymer flocculant of the powder in the desired quantity from the hopper, the powder thus discharged to the outlet mechanism in order to introduce the pre-Symbol inlet in said tank to blow the polymer flocculant with dry air, e Bei feeder and a dry air ejection mechanism for ejecting dry air turned mouth, the ejection mechanism of the feeder, The powder from the hopper
For receiving polymer flocculant and polymer agglomeration of the powder
An outlet for discharging the agent to the inlet is provided on the peripheral wall.
Cylindrical body and a hollow portion formed in the cylindrical body.
It is inserted and rotatably slidably fitted inside and the outer periphery is
Before the powdery polymer flocculant supplied at the supply port
A rotating body provided with a concave portion for carrying to the discharge port,
The polymer of the powder is formed on the outer periphery of the rotating body including the recess.
No Teflon coating to prevent coagulant adhesion
The dry air is blown into the recess by the dry air ejection mechanism.
A mixing and dissolving apparatus characterized by blowing dry air . 3. A first tank for storing a liquid, and a first tank for continuously supplying a desired amount of water into the tank.
A supply device, located above the tank, a second supply device having a charging port for continuously charged with a desired amount of powder of the polymer flocculant in the tank was fed to the tank the Water and polymer coagulation of the powder
And a stirring device for stirring the Atsumarizai, the powder flocculant solution polymer flocculant, which are mixed and dissolved in the water in said tank, and a discharge device for continuously discharged, the water And the supply amount of the polymer flocculant of the powder and the flocculation
Mixing controlled so that the discharge amount of the solution matches
A melting apparatus, mixed and dissolved and wherein the ventilator for ventilating the air in the tank so as not Komora moisture was provided was found in the tank. 4. A tank capable of storing a liquid, and a first tank for continuously supplying a desired amount of water into the tank.
A supply device, located above the tank, a second supply device having a charging port for continuously charged with a desired amount of powder of the polymer flocculant in the tank was fed to the tank the Water and polymer coagulation of the powder
And a stirring device for stirring the Atsumarizai, the powder flocculant solution polymer flocculant, which are mixed and dissolved in the water in said tank, and a discharge device for continuously discharged, the water And the supply amount of the polymer flocculant of the powder and the flocculation
Mixing controlled so that the discharge amount of the solution matches
A dissolving apparatus, comprising: a secondary mixer for mixing and dissolving the flocculant liquid more uniformly.
The coagulant liquid mixed and dissolved in the tank with the secondary liquid.
The tank and the secondary mixer to be sent to the mixing device
Tube connected as the discharging device between the
A mixing and dissolving apparatus comprising: a pump . 5. The secondary mixing device according to claim 1, wherein the secondary mixing device has a mortar shape.
The formed tapered inner surface and the
Tapered outer surface that rotates so that it
Comprising a polymer coagulation of the powder present in the coagulant liquid.
5. The mixing and dissolving apparatus according to claim 4 , wherein the mixing and dissolving are performed so that the agglomerated powder is ground .