JPH08229378A - Mixing and dissolving device - Google Patents

Abstract

PURPOSE: To uniformly and effectively perform mixing and dissolving in a short time so as not to generate undissolved lumps by feeding, by desired quantities, a liquid and a material to be mixed into a tank by two kinds of feeders to mix them in the tank and discharging the liquid mixed and dissolved according to the feed quantities by a discharge device. CONSTITUTION: A liquid is continuously fed by a desired quantity into a tank 10 by the 1st feeder 14, and by the 2nd feeder 20 above the tank 10, a material to be mixed 22 such as a flocculant is continuously fed by a desired quantity into the tank 10. The liquid and the material to be mixed are mixed in the tank 10 to turn them into a liquid in which the flocculant 22 or the like is mixed and dissolved. At this time, the mixed and dissolved liquid corresponding to the quantities fed from the 1st and the 2nd feeders 14, 20 is discharged from a tube pump 46. Thus the desired quantity of a liquid in which a material to be mixed is mixed and dissolved is obtained in a short time.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention relates to a mixing and dissolving apparatus,
More specifically, the present invention relates to a mixing / dissolving device for continuously mixing and / or dissolving an object to be mixed 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. In the batch type, a predetermined amount of liquid 200 is temporarily stored in a tank 202, a predetermined amount of mixture object 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. With this batch-type mixing / dissolving apparatus, a predetermined amount of liquid 200 and a predetermined amount of material to be mixed 204 can be reliably charged into the tank. Therefore, if the mixed material 204 is uniformly mixed and dissolved in the liquid 200, a liquid in which the mixed material is mixed and dissolved at a constant ratio can be obtained. Reference numeral 212 shown in FIG. 11 is a faucet, which opens when the liquid 200 is supplied. Also, 21
Reference numeral 4 is a valve, which opens when the liquid to be mixed and dissolved is discharged.

[0003]

However, in the above batch type mixing and dissolving apparatus, the time for temporarily storing the liquid 200 in the tank 202 and the mixture / mixture
Since it takes time to discharge the dissolved liquid, there is a problem that time efficiency is poor. Further, particularly when the mixture is a powder such as a flocculant, it takes time to simply disperse the powder, which has been added to the liquid at one time, in the liquid, and the mixture is uniformly mixed. -To dissolve, the stirring time becomes long. Further, in order to efficiently mix and dissolve, a tank of a size corresponding to that is required, and there is a problem that the entire apparatus becomes large.

Particularly, when the material to be mixed is a powder such as an aggregating agent, the powder that has been added to the liquid in a large amount at a time is difficult to be suitably dispersed in the liquid, and the residue tends to be generated. Therefore, in reality, there is a problem that the mixed material 204 cannot be uniformly mixed and dissolved in the liquid 200. Once the powder is left in the state of being mixed, no matter how much the liquid containing the powder is stirred, the powder is easily mixed with the liquid.
Can't dissolve. Mamako had to be scooped out and thrown away, wasting the flocculant. In order to mix the liquids so that they are not left untouched, it is necessary to mix powders into the liquid stored in the tank 202 in small amounts, which is a problem that it takes time. Further, the rotary stirring unit 208 of the stirring device 206 causes the liquid 20 to pass through the shaft unit 210.
Since it is immersed in 0, the shaft 210
The lumpy mixture may become entangled and grow into this large lump. For this reason, there is also a problem that the mixture cannot be mixed / dissolved in the liquid, and the ratio of the mixing / dissolution cannot be properly controlled.

Therefore, an object of the present invention is to provide a mixing / dissolving apparatus capable of uniformly and efficiently mixing / dissolving an object to be mixed in a liquid so as not to leave the liquid as it is.

[0006]

The present invention has the following constitution in order to achieve the above object. That is, the present invention is a tank capable of storing a liquid, a first supply device for continuously supplying a desired amount of the liquid into the tank, and a tank located above the tank and having a mixture to be mixed therein. A second supply device having a charging port for continuously charging a desired amount, a stirring device for stirring the liquid supplied to the tank and the mixture, and a liquid in which the mixture is mixed and dissolved in the tank. , And a discharge device that discharges according to the amount supplied from the first supply device and the second supply device.

Further, when the mixture to be mixed in the mixing and dissolving apparatus is a powder, particularly when the powder is an aggregating agent, it can be suitably applied, and the generation can be suppressed as it is.
The efficiency of dissolution can be improved.

Further, "the second supply device is provided with a hopper for storing powder for supplying the powder into the tank and a dry air supply device for supplying dry air into the hopper." An inclined surface is provided on at least a part of the inner surface of the hopper, and the dry air supply device is formed so as to eject the dry air downward along the inclined surface. ”,“ The powder supply device is provided. , A discharging mechanism for continuously discharging the powder in a desired amount from the hopper, and blowing the powder discharged to the discharging mechanism with dry air and charging the powder into the tank from the charging port to the tank side,
A feeder having a dry air jetting mechanism for jetting dry air into the inlet. In this way, the powder can be reliably supplied to the liquid stored in the tank in fixed amounts without solidifying.

Further, since the charging port is provided eccentrically from the center of the tank, the powder is mixed with the liquid.
It can be fed to a suitable position for melting, mixing,
The efficiency of dissolution can be improved.

Further, since the ventilation device for ventilating the air in the tank is provided so that the humidity is not accumulated in the tank, the moisture in the tank enters the feeder and the hopper, and the moisture causes the powder to flow. It prevents the body from solidifying.

Further, since the discharging device is a tube pump, it is possible to reliably discharge the liquid stirred in the tank by a predetermined amount.

Further, the discharge device is continuously provided,
By providing the secondary mixing device that further uniformly mixes and dissolves the liquid in which the mixture is mixed and dissolved in the tank discharged by the discharge device, the mixture can be more uniformly mixed and dissolved in the liquid.

[0013]

According to the mixing and dissolving apparatus of the present invention, the liquid and the substance to be mixed can be continuously supplied in a desired amount into the tank by the first supply device and the second supply device, and the mixture is stirred in the tank. As a result, the liquid in which the mixture is mixed and dissolved can be discharged by the discharge device in accordance with the supply amount of the liquid and the mixture to the tank. Therefore,
The liquid and the material to be mixed can be continuously mixed and dissolved under a desired certain condition, and the material to be mixed can be uniformly mixed and dissolved with the liquid. In addition, since the mixture can be continuously supplied to the liquid in small fixed amounts, this generation can be suppressed as it is, and the mixture can be suitably mixed and dissolved in the liquid.

The supply of the liquid and the mixture and the discharge of the liquid in which the mixture is mixed / dissolved are continuously performed, so that the liquid in which the mixture is mixed / dissolved is discharged during the time for storing the liquid. It does not require time and the time required to disperse the mixture when a lot of mixture is added. Therefore, time efficiency can be improved,
It is possible to obtain a desired amount of liquid in which the material to be mixed is mixed and dissolved in a short time.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A preferred embodiment of the present invention will be described in detail below with reference to the accompanying drawings. 1 to 4 show an embodiment of the mixing and dissolving apparatus according to the present invention. This example is an example of one used in the treatment of industrial wastewater and / or domestic wastewater. The liquid in which the flocculant (powder) that is the mixture is mixed and dissolved by this mixing and dissolving device (hereinafter referred to as flocculant liquid) is once stored in the storage tank and then introduced into the waste water introduced into the flocculation tank. And is reacted with the wastewater. Then, the waste water mixed and reacted with the coagulant liquid is introduced into the settling tank. The clean water is discharged, and the sediment that has settled in the sedimentation tank is discharged in a dehydrated state (cake) by a dehydrator. Some dehydrators utilize centrifugation. The concentration of the coagulant liquid is generally about 0.1 to 0.5% by weight.

The aggregating agent used in this manner is a chemical for aggregating fine particles suspended in water to form a large aggregate. As the aggregating agent, a sulfuric acid band,
There are inorganic polyvalent salts and polymeric substances such as ferric chloride.
The coagulant is dissolved in water and is roughly classified into a cation showing a positive ion, an anion showing a negative ion, and a nonion showing neutrality. As the cation component,
There are polymethacryl ester type, cation-modified polyacrylamide type, diallyl type, chitosan, polyamine type and dicyandianed type. As a component of the anion, there is a sodium polyacrylate type. In addition, as a component of nonion, there is a polyacrylamide type.

The flocculant acts to aggregate the particles in the liquid to form a large aggregate, which can increase the sedimentation rate of the particles and facilitate the filtration of the particles. This coagulant is difficult to dissolve in water, and when it dissolves in water, it must be dispersed and supplied to prevent this occurrence as it is.In the atmosphere, it tends to agglomerate due to humidity, and the melting time is affected by the water temperature and its dissolution. The liquid has a characteristic that it has a viscosity and is in a state of pulling a thread.

FIG. 1 is an explanatory diagram (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 concrete 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. A tank 10 can store a liquid (water 12 in this embodiment). It is formed in a flat hexagon and is installed in an inclined state. A first supply device 14 continuously supplies the water 12 into the tank 10 in a desired amount. It is connected to the water supply 15, and is provided with a valve 17 that opens and closes the pipeline 16 and a constant flow valve 18 that acts to keep the flow of water constant.

Reference numeral 20 designates a second supply device, which is located above the tank 10 and stores the coagulant 22 which is the material to be mixed.
An inside has an input port 24 for continuously inputting a desired amount. The 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 / dissolving in the water 12, and the efficiency of mixing / dissolving can be improved.

The second feeding device also includes a flocculant 22
A hopper 26 that stores the water for supplying the air into the tank and a dry air supply device 28 that supplies the dry air into the hopper 26 are provided. This dry air supply device 2
No. 8 (see FIG. 2) is provided with a dry air generating portion 30 for forming dry air to jet the dry air downward along the inclined inner surface of the hopper 26 and for supplying the dry air to the jet outlet. . The dry air generating unit 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 utilizing pressure change and temperature change can be used, but in the present embodiment, a hollow fiber membrane is used. There is. As a result, the size of the device can be reduced.

Reference numeral 34 denotes a feeder, and a discharging mechanism for continuously discharging the coagulant 22 from the hopper 26 in a desired amount,
It has a dry air ejection mechanism 36 for ejecting the dry air into the inlet 24 so that the flocculating agent 22 discharged into the inlet 24 by the discharge mechanism is blown by the dry air and is injected into the tank 10. This dry air ejection mechanism 36
Is provided with a nozzle for ejecting dry air into the charging port 24, and a dry air generator 30 for supplying dry air to the nozzle. The dry air generating unit 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 charging port 24 in this manner, the coagulant 22 can be reliably supplied to the water 12 stored in the tank 26 in small amounts without solidifying. .

A stirring device 38 has a stirring blade 40 at the bottom of the tank 10 which is rotated by the power of a motor 39. The stirring blade 40 causes water 12 and coagulant 22 to be supplied into the tank 10. Stir. Since the stirring blade 40 is located at the bottom, there is a problem that the shaft-like mixture of the mixture remains trapped in the shaft as in the prior art shown in FIG. It won't happen. Reference numeral 42 denotes a water level detection device, which is used to supply the supplied water 12 and the coagulant liquid 43 (the coagulant 22 is mixed.
The amount of dissolved water) is detected by its liquid level (height of liquid surface). When the liquid level exceeds the upper limit or the lower limit, a signal from the water level detection device 42 controls the first supply device 14 and the second supply device 20, or the discharge device (for example, a tube pump 46 described later). , The amount of the water 12 and the coagulant 22 input and the amount of the coagulant liquid 43 discharged can be matched. It should be noted that controlling the discharge amount of the coagulant liquid 43 has an advantage that only the discharging device needs to be controlled, rather than achieving matching by controlling the input amounts of the water 12 and the coagulant 22. Further, reference numeral 45 is a ventilation device, which prevents the tank 10 from being damp.
Ventilate the air inside. This prevents the moisture in the tank 10 from entering the feeder 34 and the hopper 26 and coagulating the flocculant 22 by the moisture.

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

Reference numeral 50 denotes a secondary mixing device, which is continuously and doubly provided on the tube pump 46 through the pipe 52 to further uniformly mix and dissolve the coagulant liquid 43 discharged by the tube pump 46. . The coagulant 22 can be mixed and dissolved in the water 12 more uniformly. 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 is a control panel, which controls the operation of the devices of the respective parts. Reference numeral 56 denotes a power supply, which supplies electric power to the control panel 54 and devices of the respective parts via the control panel 54. 58
Is a supply signal, which is input by the user, and the control conditions are set by this signal. 60 is valve 1
The wiring extends from the control panel 54 for opening and closing 7. Reference numeral 62 is a wiring from the control panel 54 for operating the compressor 33. Reference numeral 64 is a wiring from the control panel 54 for controlling the motor 66 for driving the feeder 34. Reference numeral 68 is a wiring from the control panel 54 for controlling the motor 39 that drives the stirring blade 40 to rotate. Reference numeral 69 is a wiring from the control panel for controlling the tube pump 46. 70 is a secondary mixing device 50
The wiring from the control panel 54 for controlling the. Also,
72 is a sensor for detecting the amount of the coagulant 22, and 74 is a wiring for sending the signal detected by the sensor 72 to the control panel. Further, reference numeral 76 is a wiring for sending a signal detected by the water level detection device 42 to the control panel.

Next, the function and effect of the mixing / dissolving apparatus having the above structure 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. In addition, the aggregating agent 2 is mixed by being stirred in the tank 10.
The coagulant liquid 43 in which 2 is 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 a large amount of the coagulant 2 at one time.
The time required to disperse the coagulant 22 when 2 is added is not required. Therefore, time efficiency can be improved, and a desired amount of the coagulant liquid 43 can be obtained in a short time. Further, since the coagulating liquid 43 can be continuously discharged,
The coagulant liquid 43 can be efficiently supplied in relation to the subsequent process. In that respect, if the coagulant liquid is continuously discharged by the conventional technique, since it is a batch type, it is necessary to use two tanks,
A container for storing the coagulant liquid is required, which complicates the device.
It becomes large. Furthermore, since the tank 10 may be smaller than the conventional batch type, it can quickly reach a steady state. That is, there is also an advantage that the rising is quick.

Further, since the water 12 and the coagulant 22 can be continuously mixed and dissolved under a desired constant condition, the coagulant 22 can be uniformly mixed and dissolved with the water 12.
In the conventional batch method, water is temporarily stored in a tank and a desired amount of a coagulant is mixed, so if mixing and dissolution are ideal, a flocculant solution with an ideally uniform concentration can be obtained. it can. However, it is difficult to ideally mix / dissolve a coagulant, which is hardly soluble in water, to a predetermined concentration as described in the section of the prior art. Further, the concentration of the coagulant liquid 43 does not need to be strictly uniform due to its nature. Therefore, it is possible to obtain a flocculant liquid having a uniform concentration which is sufficiently used even in the system in which it is continuously supplied and discharged as in this embodiment. In fact, a flocculant liquid having a desired concentration can be obtained rather than the conventional batch system. this is,
Since the coagulant 22 can be continuously supplied (dispersed and supplied) to the water 12 in small fixed amounts, the generation of the coagulant 22 can be suppressed and the coagulant 22 can be suitably mixed and dissolved in the water 12. Is. Further, since this 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 coagulant can be stored in a sufficient amount of water to uniformly mix and dissolve the coagulant, and is particularly large. Since it does not require a tank, it can be downsized and the installation space can be reduced. Further, since the dry air is jetted to dry the inside of the hopper 26, the feeder 34, and the inside of the input port 24, it is possible to prevent the coagulant 22 from coagulating and clogging the coagulant 22 by a bridge or the like. it can. Further, the operation panel 78 uses a sheet-like switch, and since it has a dustproof and waterproof structure, malfunctions can be prevented, which is also preferable in terms of design.

Next, the configuration of each part 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 the lower portion 26a is formed in a mortar shape and can store the powdery coagulant 22. The stored powdery coagulant 22 moves along the inclined inner wall surface 80 by the action of gravity and is supplied from the discharge port 82 to the feeder 34. 84
Is a jet of dry air. This spout 84 is a pipe 86
Is connected to the dry air generator 30 (see FIG. 2). Further, 90 is a lid, which is provided so as to be openable and closable around a shaft 92. 94 is a gasket. As a result, the hopper 26 is a closed container that supplies dry air and releases a pressure increase in the atmosphere in order to reduce the humidity inside. Therefore, it is possible to prevent the coagulant 22 in the hopper 26 from condensing and bridging and being unable to be supplied from the hopper 26 to the feeder 34. Further, the flocculating agent 22 can be prevented from hardening and the flocculating agent 22 can be stored for a long period of time. The tank 10 does not have to be a strict closed container, and may have a suitable positive pressure inside the tank 10 by supplying dry air even if dry air leaks.

Further, as shown by the arrow 88, it is effective that the dry air is jetted along the inclined inner wall surface 80 in order to prevent the bridging agent 22 from bridging in the tank 10 (especially, the discharge port 82). is there. That is, since the inclined inner wall surface 80, which is the moving surface of the coagulant 22, is kept in a suitable dried state, it is possible to prevent the coagulant 22 from adhering and prevent the occurrence of bridges. Further, by coating the inside of the tank with a Teflon coating that forms a surface with low friction resistance, the adhesion of the aggregating agent 22 is prevented, and the aggregating agent 22 is preferably discharged.

Further, a buzzer and a lamp (not shown) for detecting the remaining amount of the coagulant 22 by the above-mentioned sensor 72 and issuing a warning of the remaining amount of the coagulant 22 in response to a signal from the sensor 72 are provided. ing. Since the tank 10 can be downsized as described above, the entire apparatus can be downsized and the height position of the hopper 26 can be lowered. Therefore, the height at which the coagulant 22 is charged by the worker can be set low, and the workability can be improved.

Next, the feeder 34, which is a constituent member of the second supply device 20, will be described with reference to FIGS. 6 and 7. FIG. 6 is a vertical sectional view of the feeder, and FIG. 7 is a horizontal sectional view of the feeder. Reference numeral 96 denotes a tubular main body having a hollow portion 98, a supply port 100 for receiving the coagulant discharged from the hopper 26 is provided on the upper side, and the coagulant 22 is discharged to the charging port on the lower side. A discharge port 102 is provided for Reference numeral 104 denotes a pipe line, the upper end of which is connected to the discharge port 102 and the lower end of which is connected to the input port 24 (see FIG. 8).

Reference numeral 106 denotes a rotating body, which is inserted into the hollow portion 98 and is slidably fitted on the inner peripheral wall surface 97 of the cylindrical main body 96 at a portion having a large outer diameter. 1
Refer to) to rotate. Indentations 108 (four locations in this embodiment) are provided at predetermined intervals on the outer circumference of the rotating body 106. Therefore, by rotating the rotating body 106, the recessed portion 1 is formed in the supply port 100.
The coagulant 22 having 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 the cylindrical main body 96.
From this nozzle 110, dry air can be ejected to the discharge port 102 through the fine holes 112 provided in the cylindrical main body 96. With this configuration, the coagulant 22 in the state of being carried to the discharge port 102 can be blown off by the dry air ejected from the nozzle 110 and discharged to the charging port 24 side.

According to this feeder 34, the aggregating agent 22 can be continuously supplied little by little. That is, it is possible to supply in a dispersed manner, and it is possible to suppress this occurrence. In addition, the coagulant liquid 4 is adjusted by adjusting the rotation speed of the rotating body.
It is possible to adjust the density of 3. Also, the rotating body 1
Wear resistance can be improved by applying Teflon coating to the outer peripheral contact surface 114 that contacts the inner peripheral wall surface 97 of 06. In addition, the dent portion 108 that acts to eject the coagulant 22 is also provided with Teflon coating, and the dent portion 108 has a discharge port 1.
Since the structure is such that dry air is blown to the dented portion 108 when it moves into the inside 02, it is possible to prevent the adhesion of the coagulant 22. Therefore, the flocculant can be stably supplied. In addition, in order to improve the corrosion resistance, the cylindrical main body 96 may be made of stainless steel.

Next, the structure of the tank 10 will be described with reference to FIGS. 8 and 9. 8 is a side sectional view of the tank, and FIG. 9 is a plan view of the tank of 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 the hole provided in the lid 116. The charging port 24 is made of a resin material, is connected to the feeder 34, and the opening 24a is formed with its side facing. Moisture (especially tank 1
This is for making the material that moisture (moisture generated from the water 12 stored in 0) hardly condenses. Further, the opening 24a is directed to the side because the tank 1 is in a state where the coagulant 22 is more diffused.
This is for supplying within 0.

The inlet 24 for the coagulant 22 is connected to the tank 1
0 Offset from the center. As a result, the coagulant 22 can be added to a portion where the flow velocity of the outer circumference of the vortex flow generated by the stirring blade 40 is fast and the liquid is moving in a complicated manner, and the coagulant 22 can be efficiently stirred.

The tank 10 is formed in a hexagonal shape when viewed from above, and the water 12 and the coagulant 22 can be efficiently stirred. This is because the flow of water 12 can be appropriately stirred by the resistance of the corners. The shape of the tank 10 is not limited to the hexagonal shape of this embodiment, and may be formed in other polygonal shapes. Further, when the tank 10 has a circular shape as viewed from above, an appropriate baffle plate may be attached to the inner peripheral side wall surface so as to disturb the water flow, whereby the stirring efficiency can be improved.

Also, by slightly tilting the tank 10, it becomes possible to slightly disturb the balance of the vortex flow and move the water in a complicated manner, so that efficient stirring can be performed, and
It is also possible to reduce the residual material when draining. 118 is an outlet. Then, in order to obtain the above effects, the tank 10
Since it is only necessary to slightly tilt, the manufacturing cost can be reduced.

Further, the stirring blade 40 is provided with a hole 40a, and the hole 40a can efficiently stir by the action of the turbulent flow generated when the water 12 is cut. Four stirring blades 40 are provided and are driven to rotate by a motor 39.
The stirring blade 40 is provided so as 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 side. Therefore, according to the present embodiment, there is no problem in that the shaft of the stirring blade is entangled with the rudder 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 temperature of the tank 10 itself. As a result, the occurrence of poor mixing / dissolution due to the decrease in water temperature in winter is suppressed. In this respect, conventionally, a throw-in type heater has been used, but there is a problem in that a flocculating coagulant is entangled. Further, the ventilation device 45 is provided on the lid 116 to ventilate the air in the tank 10 and prevent the coagulant from condensing as described above.

The coagulant liquid mixed and dissolved in the tank 10 is discharged by the tube pump 46 (see FIG. 3) which is a discharging device. By using the tube pump 46, the residue generated in the tank 10 can be suitably transferred to the next step. Also, by adjusting the number of rotations of the motor,
The discharge amount of the flocculant liquid can be easily adjusted. By connecting with the water level detection device 42, the discharge amount of the coagulant liquid can be easily matched with the supply amount of water and the coagulant as described above.
Note that the discharge device is not limited to the tube pump, and it goes without saying that other means such as a gear pump can be used.

Next, the secondary mixing will be described.
As mentioned above, mixing and dissolving in the tank 10 is 1
It can be said to be secondary mixing, and when it is necessary to mix and dissolve more uniformly, secondary mixing is performed. The colloid mill 120 of FIG. 10 is an example of the secondary mixing device 50. FIG. 10 is a vertical sectional view of the colloid mill 120. Two colloid mills 120 are used in the mixing and dissolving apparatus of the present embodiment, but it may be necessary to use one colloid mill 120 or three or more colloid mills 120, and it may not be necessary depending on the use conditions.

Reference numeral 122 denotes a main body, the tip end portion 124 of which is formed in a mortar shape and has a tapered inner surface 126. 12
Reference numeral 8 denotes a rotating member, which is a shaft portion 130 on the rear end side of the main body 1.
It is rotatably fitted in the bearing 22 via bearings 131 and 132. The tip end side 134 is formed in a truncated cone shape so as to correspond to the taper inner surface 126, and has a taper outer surface 136. Further, 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. Also, 14
2 is a coagulant liquid supply port, and 143 is a coagulant liquid discharge port. According to this colloid mill 120, the coagulant liquid supplied from the coagulant liquid supply port 142 is mixed between the taper inner surface 126 and the taper outer surface 136 which rotates so as to rub against the taper inner surface 126, and the discharge port. It is discharged from 143. As a result, the scraps that have been present in the flocculant liquid are crushed and mixed and dissolved in water.
In this way, the cod can be extinguished, and the coagulant can be preferably dispersed.

In the above embodiments, the case where the coagulant is mixed and dissolved in water has been described, but it goes without saying that the liquid is not limited to water and other solvents can be used. Further, the mixture is not limited to the aggregating agent (powder), but may be other solute such as liquid. Although various preferred embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and many modifications can be made without departing from the spirit of the invention. .

[0046]

According to the mixing and dissolving apparatus of the present invention,
Since the liquid and the mixture can be continuously mixed and dissolved under a desired fixed condition, the mixture can be uniformly mixed and dissolved with the liquid. In addition, since the mixture can be continuously supplied to the liquid in small fixed amounts, this generation can be suppressed as it is, and the mixture can be suitably mixed and dissolved in the liquid. Since the supply of the liquid and the mixture and the discharge of the liquid in which the mixture is mixed are continuously performed, a large tank is not required, and the time for discharging the liquid in which the mixture is mixed and the like is eliminated. Does not need Therefore, it is possible to obtain a desired amount of liquid in which the mixture is mixed and dissolved in a short time, which is a remarkable effect.

[Brief description of drawings]

FIG. 1 is an explanatory diagram 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 shown in FIG.

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

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

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

FIG. 6 is a vertical sectional view of the feeder according to the embodiment of FIG.

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

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

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

10 is a vertical cross-sectional view of the secondary mixing device according to the embodiment of FIG.

FIG. 11 is an explanatory diagram illustrating a conventional technique.

[Explanation of symbols]

 10 Tank 12 Water 14 First Supply Device 15 Water Supply 17 Valve 18 Constant Flow Valve 20 Second Supply Device 22 Flocculant 24 Input Port 26 Hopper 28 Dry Air Supply Device 30 Dry Air Generating Part 34 Feeder 36 Dry Air Spouting Mechanism 38 Stirrer 42 Water Level Detector 43 Flocculant liquid 45 Ventilator 46 Tube pump 50 Secondary mixing device 53 Treatment tank

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Internal reference number FI Technical display location B01F 15/02 B01F 15/02 C

Claims (10)

[Claims] 1. A tank capable of storing a liquid, a first supply device for continuously supplying the liquid into the tank in a desired amount, and a desired mixture to be mixed in the tank located above the tank. The second supply device having a charging port for continuously charging in the amount of, a stirring device for stirring the liquid supplied to the tank and the mixture, and a liquid in which the mixture is mixed and dissolved in the tank, A mixing / dissolving device, comprising: a discharging device that discharges in correspondence with the amount supplied from the first supplying device and the second supplying device. 2. The mixing and dissolving apparatus according to claim 1, wherein the material to be mixed is powder. 3. The second supply device is provided with a hopper for storing powder for supplying the powder into the tank, and a dry air supply device for supplying dry air into the hopper. 2. The mixing and dissolving apparatus according to 2. 4. An inclined surface is provided on at least a part of an inner surface of the hopper, and the dry air supply device is formed so as to eject the dry air downward along the inclined surface. Item 3. The mixing and dissolving apparatus according to Item 3. 5. A discharge device for continuously discharging the powder from the hopper in a desired amount by the powder supply device, and a dry air blown away the powder discharged to the discharge mechanism to the tank side. 5. The mixing and dissolving apparatus according to claim 3, further comprising: a feeder having a dry air jetting mechanism for jetting dry air into the tank so that the dry air is jetted into the tank from the slot. 6. The charging port is provided eccentrically from the center of the tank.
The mixing and dissolving apparatus according to 3, 4, or 5. 7. The mixture according to claim 1, further comprising a ventilator for ventilating the air in the tank so that moisture is not accumulated in the tank. Dissolution equipment. 8. The discharge device is a tube pump, as claimed in claim 1, 2, 3, 4, 5, 6 or 7.
The described mixing and dissolving apparatus. 9. An object to be mixed and mixed in a tank which is continuously provided to the discharging device and is discharged by the discharging device.
A secondary mixing device for mixing and dissolving the dissolved liquid more uniformly is provided.
The mixing and dissolving apparatus according to 4, 5, 6, 7 or 8. 10. The mixing and dissolving apparatus according to claim 1, wherein the powder is an aggregating agent.