JP2005095867A - Water purifying treatment system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a structure which comprises a small apparatus, can be relocated, and has a low cost, in a water purifying treatment system adding chemicals such as a flocculant to treating water, and purifying by separating other materials from water. <P>SOLUTION: This treatment system 10 includes an agitation device 12 adding the chemicals to the treating water and mixing, and a separation tank 13 separating water from the treating water. The agitation device 12 comprises a powder supply unit 25, a liquid supply unit 34, and a reactor 18, and agitates the treating water by generating rotary flow in the reactor 18 due to a discharge pressure obtained by pumping the treating water into the reactor 18 by using a pump 14. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a water purification system for purifying water by adding chemicals.

At construction sites such as conventional construction and civil engineering work, the entire amount of water used is sludge that is subject to the Waste Management Law and is only transported to the disposal site for disposal. As a result, the sludge water discharged from the construction site is purified and discharged.
Also, factory wastewater such as alkaline wastewater has become stricter every year, so that the factory wastewater is discharged in the factory after water purification such as pH adjustment and suspension removal. became.
Agricultural water that is flown into farmland such as paddy fields and used for growing crops is preferably water that does not contain specific chemical substances or other unnecessary substances in order to adjust the growth environment of crops. On the other hand, agricultural water discharged into rivers contains nitrogen and phosphorus that lead to eutrophication of lakes and marshes by the application of fertilizers and agricultural chemicals. Therefore, before introducing agricultural water into farmland or before discharging agricultural water into a river, it is necessary to remove these by performing water purification treatment.

For the water purification treatment as described above, conventionally, a floc is formed by adding a coagulating sedimentation agent to the turbid water introduced into the stirring tank, and stirring to form a floc. An apparatus for purifying water is known. For example, there are techniques described in Patent Document 1 and Patent Document 2.
The flocculants generally used in these apparatuses are roughly classified into inorganic flocculants and organic polymer flocculants. These are generally liquids or powders. Therefore, in the technique described in Patent Document 2, two types of flocculants, powder and liquid, can be added to the treated water.

Moreover, like the technique of patent document 3, compared with the water purification apparatus with which a plant etc. are equipped, the movable type water purification apparatus which is small and can be moved and used to the field is proposed, It is publicly known.
In addition, a water purification apparatus is known in which several large trucks and dedicated automobiles are prepared, and a tank, a treatment tank, a filtration tank, and a dehydrator are mounted on the automobile to form an on-vehicle plant.
JP 2003-1013 A JP 2002-35800 A JP 2002-13222 A

In order to make it easy to move the water purification system with the movement of the construction site, and to be able to use it in a wide variety of situations, it has a structure that is as compact as possible and versatile. In order to increase the thickness, an inexpensive and simple structure is preferable.
In addition, when a chemical such as a flocculant used for water purification is a powder, a powder supply device is provided as an apparatus. However, in the powder supply, the powder is contained in a hopper holding the powder. The body is likely to be clogged, which may hinder the supply of appropriate powder.
In view of the above conventional problems, the present invention proposes a water purification system having a simple structure, low cost, and high versatility.

  The problems to be solved by the present invention are as described above. Next, means for solving the problems will be described.

  That is, in Claim 1, it is a water purification system provided with the stirring apparatus which adds and mixes a chemical | medical agent to treated water, and the separation tank which isolate | separates water from treated water, Comprising: The said stirring apparatus is a powder supply apparatus. The liquid supply device and the reaction tank are configured to generate a swirling flow in the reaction tank by pumping the treated water into the reaction tank.

  According to a second aspect of the present invention, a pump is used to pump the treated water to the stirring device, and a water permeable film is stretched at the water suction port of the pump.

  In Claim 3, It is a water purification processing system provided with the stirring apparatus which adds a chemical | medical agent to a treated water, and mixes, and the separation tank which isolate | separates water from a treated water, Comprising: A flow path by a partition plate inside the said separation tank And a water-permeable member is provided in the flow path.

  In Claim 4, in the said stirring apparatus, a partition is provided in the inside of a reaction tank, it divides into the outer peripheral part and inner peripheral part which communicate in a reaction tank lower part, and the inflow port of the treated water to a reaction tank is an outer peripheral part. And an outlet for treated water from the reaction tank is opened at the inner periphery.

  According to a fifth aspect of the present invention, the treated water is pumped into the reaction tank with an angle downward in the circumferential direction from the inlet.

  According to a sixth aspect of the present invention, a protrusion standing in the center direction is provided on the inner wall of the partition wall.

  According to a seventh aspect of the present invention, in the stirring device, a plate-like body standing in the center direction is provided on the inner wall of the reaction vessel.

  According to an eighth aspect of the present invention, the powder supply device has a hopper for loading powder, a feeding shaft supported at a lower portion of the hopper, and is fitted on the feeding shaft inside the hopper, and a recess is formed in the outer peripheral portion. A feeding roller and a motor for driving the feeding shaft.

  According to a ninth aspect of the present invention, a frame body is provided in the hopper, the frame body is fixed to a swing shaft, the swing shaft is provided in the hopper so as to be substantially parallel to the feeding shaft, A crank mechanism is provided between the feeding shaft.

  According to a tenth aspect of the present invention, a brush that contacts the outer peripheral surface of the feeding roller is provided in the hopper, the brush is fixed to a swinging shaft, and the swinging shaft is attached to the hopper so as to be substantially parallel to the feeding shaft. A crank mechanism is provided between the swinging shaft and the feeding shaft.

  In the present invention, the powder supply device includes a hopper for loading powder, a feed pipe connected to the lower end of the hopper, and a substantially horizontal direction that is built in the feed pipe and is rotationally driven by a motor. A support body that is fixed to the side surface of the hopper, a body portion that is supported by the support body so as to be slidable in a substantially vertical direction, and a head portion that can contact the support body. It is provided with a clogging prevention mechanism comprising a piston and a cam that is externally fitted to the feeding shaft and whose outer shape is a spiral shape whose diameter changes from the center, and whose minimum diameter portion and maximum diameter portion are continuous.

  As effects of the present invention, the following effects can be obtained.

  According to the first aspect, since the swirling flow can be generated in the reaction tank by pumping the treated water, a stirring blade or the like is unnecessary, and the apparatus can be configured compactly and inexpensively. In addition, since the stirring device includes a powder supply device and a liquid supply device, either or both of a liquid or a powder medicine can be supplied to the treated water.

  In claim 2, a relatively large solid such as mud of treated water sent to the stirring device can be removed by the water permeable membrane, and the amount of solid deposited in the stirring device or the separation tank can be reduced. Therefore, it can contribute to the compactness of the stirring device and the separation tank.

  According to the third aspect, in addition to the separation using the flow of water in the separation tank and the specific gravity difference between the solids, the water and the solid can be separated by the water permeable membrane.

  In Claim 4, a chemical | medical agent and treated water can be stirred in a reaction tank outer peripheral part, and a chemical | medical agent and treated water can be made to react in a reaction tank inner peripheral part. In addition, since the treated water descends the outer periphery of the reaction tank and then rises and is discharged from the inner peripheral part of the reaction tank, the treated water that has flowed into the reaction tank is discharged through a longer channel.

  According to the fifth aspect of the present invention, a downward swirling flow can be formed on the outer periphery of the reaction tank.

  According to the sixth aspect of the present invention, the water flow is disturbed by contact with the protrusions while the treated water rises in the inner periphery of the reaction tank, so that the treated water can be present inside the reaction tank.

  According to the seventh aspect of the present invention, the swirl flow formed inside the reaction tank comes into contact with the plate-like body, so that turbulence is formed in the flow, and thereby effective stirring can be achieved.

  According to the eighth aspect of the present invention, when the feeding roller rotates along with the feeding shaft, the powder loaded in the recess of the feeding roller is quantitatively dropped from the hopper.

  According to the ninth aspect, the powder in the hopper can be vibrated by the frame body, and clogging in the hopper can be prevented. Moreover, a mechanism for preventing clogging of the hopper can be driven by using the power for feeding the powder from the hopper.

  According to the tenth aspect of the present invention, the bending of the brush can be prevented by swinging the brush. Moreover, the powder on the surface of the rocking roller can be scraped out effectively.

  According to the eleventh aspect of the present invention, it is possible to configure a clogging prevention mechanism in the hopper that uses power for feeding the powder from the hopper.

Next, embodiments of the invention will be described.
FIG. 1 is a diagram showing an overall configuration of a water purification system according to Embodiment 1 of the present invention.
FIG. 2 is a side view showing the configuration of the separation tank, and FIG. 3 is a side view showing another embodiment of the configuration of the separation tank.

First, the overall configuration of the water purification system 10 according to the present embodiment will be described.
As shown in FIG. 1, the water purification system 10 includes a stirrer 12 that mixes and stirs chemicals with respect to the treated water sucked up from the reservoir 11 storing the treated water using the submersible pump 14; The stirring device 12 includes a separation tank 13 for filtering treated water mixed with a chemical.
Any of the stirring device 12 and the separation tank 13 constituting the water purification treatment system 10 can be moved, and can be installed at a desired place to perform water purification treatment.

In the submersible pump 14, a water permeable member 14 a is provided at a water intake port that sucks up treated water from the reservoir 11. In this embodiment, the water permeable member 14 is a frame body in which a water permeable film is stretched, and surrounds the water inlet of the submersible pump 14. However, the form of the water permeable member 14a is not limited to the present embodiment, and a water permeable film is directly stretched at the water suction port of the submersible pump 14, or a fine mesh is attached to the frame instead of the water permeable film. It can also be.
The water-permeable member 14a can remove the mud in the water sucked up by the submersible pump 14 with the water-permeable member 14a, and the treated water sent to the stirring device 12 becomes suspended water that has passed through the water-permeable member 14a. Then, the suspension device is agglomerated using the flocculant as a medicine in the agitator 12, and the suspension of the suspension water is further solid-liquid separated in the separation tank 13.
Thus, by removing the mud in the treated water with the water permeable member 14a in the first stage of the purified water treatment, the purified water treatment system 10 can have a simple configuration, and the stirring device 12 and the separation tank 13 can be used. Since the amount of solids separated by the can be reduced, the apparatus provided in the water purification system 10 can be made compact.

  The treated water pumped up by the submersible pump 14 disposed in the reservoir 11 is pumped into the reaction tank 18 through the inflow pipes 15 and 30 by the pressure of the submersible pump 14. The flow rate of the treated water flowing into the reaction tank 18 from the inlet 29 of the reaction tank 18 is measured by the flow meter 16 inserted in the inflow pipes 15 and 30, and the reaction flow is obtained by the flow meter 16. The flow rate of the treated water flowing into the tank 18 from the inlet can be known, and the flow rate of the treated water flowing into the reaction tank 18 is adjusted. The liquid flow in the reaction tank 18 is formed by the treated water flowing into the reaction tank 18 from the inlet 29, and the liquid in the reaction tank 18 at the flow rate of the treated water flowing into the reaction tank 18 from the inlet 29. The speed of the flow is adjusted.

  The agitation device 12 includes a powder supply device 25 and a liquid supply device 34 so that both forms of powder and liquid can be used as an agent to be mixed with the treated water by the agitation device 12. Composed. Therefore, according to the kind of treated water, the chemical | medical agent used for a water purification process can select and use either a liquid or powder, or both a liquid and powder. Therefore, the use of the stirring device 12 of the same form is expanded, and the versatility of the stirring device 12 is enhanced, thereby contributing to the cost reduction in manufacturing.

In this embodiment, the treated water to be treated by the purified water treatment system 10 is turbid water, but the treated water that can be treated by the purified water treatment system 10 is not limited to this. By using the agent and the pH adjuster, it is possible to remove contaminants in the alkaline wastewater and adjust the pH.
Further, for example, by using an aggregating agent and an oxidizing agent as chemicals, it is possible to remove nitrogen, phosphorus, organic substances and other contaminants in agricultural wastewater.

  A flange 19 a of the discharge pipe 19 is connected to a flange 18 d provided at the discharge port 18 c of the reaction tank 18 of the stirring device 12. Then, the treated water mixed with the chemical discharged from the reaction tank 18 passes through the discharge pipe 19 and flows into the separation tank 13 from the inlet 20 provided on one side surface of the separation tank 13.

As shown in FIG. 2, the inside of the separation tank 13 is divided into three parts, which are a first compartment 55, a second compartment 56, and a third compartment 57, which are communicated by partition plates 54 and 54. As a result, a flow path for the treated water in the separation tank 13 is formed. The treated water flows into the first section 55 and flows from the upper side to the lower side, flows into the second section 56 and flows from the lower side to the upper side. It flows into the compartment 57 from above. In the second compartment 56, the water permeable membrane 21 is stretched in the flow path of the treated water so that the treated water passes through the water permeable membrane 21. However, the water permeable membrane 21 can be provided in the first compartment 55 or in both the first compartment 55 and the second compartment 56.
The permeable membrane 21 is provided to separate solids such as floc in the treated water from the treated water, and only the liquid in the treated water can pass through the permeable membrane 21 and flows into the third compartment 57. The treated water becomes purified water containing almost no solid.

The third compartment 57 is provided with a discharge port 22, and treated treated water is spontaneously discharged from the discharge port 22. The water treated by the water purification system 10 is water that is purified and does not naturally affect even if it is discharged into a river or the like.
In addition, as shown in FIG. 3, the submersible pump 50 can be arrange | positioned in the 3rd division 57, and the treated water in the 3rd division 57 can also be discharged | emitted by this submersible pump 50. FIG.

  Here, the configuration of the stirring device 12 will be described in detail in Examples 1 and 2 below. In Example 1 and Example 2, the same code | symbol is attached | subjected about the member which has the same function.

Next, the structure of the stirring apparatus 12 which concerns on Example 1 is demonstrated.
4 is a front view of the stirring device, FIG. 5 is a front cross-sectional view showing the internal structure of the reaction tank, FIG. 6 is a cross-sectional view taken along arrow YY in FIG. 5, and FIG. 7 is a front view showing the liquid supply device. Is a front view of the powder supply apparatus, FIG. 9 is a side view of the powder supply apparatus, FIG. 10 is a front sectional view showing the internal structure of the powder supply apparatus, and FIG. FIG.

  As shown in FIG. 4, the stirring device 12 includes a columnar reaction tank 18, a powder supply device 25 mounted and fixed on the upper portion of the reaction tank 18, and a liquid supply device 34 disposed in the vicinity of the reaction tank 18. Consists of.

  As shown in FIGS. 4 to 6, the reaction tank 18 is composed of a cylindrical portion 18a having an upper opening and a conical portion 18b continuous to the lower portion thereof, and legs 61, 61, fixed around the cylindrical portion 18a. 61 is erected. An inflow port 29 and a discharge port 18c are opened on the upper side surface of the cylindrical portion 18a of the reaction tank 18 from the upper and lower approximate centers, and a drain port 18e is opened at the bottom of the cone portion 18b.

Inside the reaction tank 18, a cylindrical partition wall 65 having both upper and lower ends open is inserted, and the columnar reaction tank 18 is separated into an outer peripheral part and an inner peripheral part by the partition wall 65, and the outer peripheral part is agitated by the stirring part M. The inner peripheral part is a reaction part N.
The partition wall 65 is installed with a gap between the lower portion and the upper portion of the reaction tank 18, and an opening 65 c communicating with the discharge port 18 c is formed in the upper portion 65 b of the partition wall 65. A cylindrical body 65d that extends toward the outside of the reaction tank 18 is joined to the opening 65c, the cylindrical body 65d extends to the outside of the reaction tank 18, and an end thereof serves as a discharge port 18c.
With the above-described configuration, the treated water that has flowed into the stirring unit M of the reaction tank 18 from the inlet 29 descends the stirring unit M and enters the reaction unit N from below the partition wall 65, and the treated water in the reaction unit N is The reaction part N is raised and discharged from the discharge port 18c to the outside of the reaction tank 18. In this way, the treated water descends the stirring portion M on the outer peripheral portion of the reaction tank, and then rises and is discharged from the reaction section N on the inner peripheral portion of the reaction tank, so that the treated water flowing into the reaction tank has a longer flow rate. It will be discharged through the road.

  The inlet 29 formed in the reaction tank 18 is formed with an introduction pipe 29a having an inclination of an angle θ (θ = approximately 30 degrees) descending from the upper side to the lower side in the circumferential direction. Therefore, the water is pumped up by the submersible pump 14 disposed in the reservoir 11, and flows into the reaction tank 18 through the inlet pipe 29 a from the inlet 29 through the inlet pipes 15 and 30 by the pressure of the submersible pump 14. The treated water is pressed downward in the circumferential direction with an inclination of angle θ. Thereby, the swirling flow which goes downward is formed in the stirring part M of the reaction tank 18 by the treated water flowing into the reaction tank 18.

As described above, in order to agitate the liquid in the reaction tank 18, a liquid flow (swirl flow) is formed using the flow pressure of the treated water flowing into the reaction tank 18, and the treated water is generated by this swirl flow. And the chemical mixed in the treated water and the treated water are mixed in the reaction tank 18.
Therefore, the liquid in the reaction tank 18 can be stirred without providing the stirring blade and its driving device in the reaction tank 18, and the stirring apparatus 12 can be made more compact and inexpensive.

A plurality of turbulent flow generation projections 66, 66... Are provided on the inner wall of the partition wall 65 provided in the reaction tank 18. The turbulent flow generation projection 66 is fixed in a state of standing up from the inner wall of the partition wall 65 toward the center of the circle, and a rising liquid flow is generated in the reaction portion N of the reaction tank 18 that is a projecting body. The liquid flow abuts against the turbulent flow generation projections 66, 66... While moving up the portion N, so that the rising flow is disturbed, and the liquid can rise up the reaction portion N over a longer time. . Thereby, more reaction time of treated water and a chemical | medical agent can be taken.

The liquid supply device 34 is disposed on the side of the reaction tank 18.
As shown in FIG. 7, the liquid supply device 34 includes a liquid tank 35, a stirring blade 33a for stirring the liquid in the liquid tank 35, a stirring motor 33 for driving the stirring blade 33a, and a reaction tank. A supply pump 32 for supplying the liquid into the liquid tank 18 and a supply pipe 36 for supplying the liquid in the liquid tank 35 to the reaction tank 18. The end of the supply pipe 36 is guided to the upper part of the stirring unit M of the reaction tank 18, and the chemical solution in the liquid tank 35 is supplied from the upper part of the reaction tank 18 to the stirring unit M of the reaction tank 18.
The chemical liquid filled in the liquid tank 35 is, for example, a powdered flocculant dissolved and dissolved in water. The supply pipe is always in a state where the stirring motor 33 is driven and the liquid is stirred by the stirring blade 33a. Through 36, the water flocculant is quantitatively supplied to the reaction tank 18 by the supply pump 32.

The powder supply device 25 is provided in the upper part of the reaction tank 18.
As shown in FIGS. 4 and 8 to 11, the powder supply device 25 includes a powder hopper 26 that is filled with powder, a feeding mechanism that is configured below the powder hopper 26, and a feeding shaft 68 of the feeding mechanism. And a feeding motor 45 for driving the motor.

The powder hopper 26 has an upside down pyramid shape, and its lower part is fixed to the upper part of the reaction tank 18 by stays 63 and 63.
The powder hopper 26 is open at the top and bottom, and the lower opening is a powder outlet 26c, and the opening 18f (FIG. 5) formed in the upper part of the reaction tank 18 is located below the powder outlet 26c. . Accordingly, the powder fed from the powder hopper 26 falls from the discharge port 26 c and is supplied to the stirring unit M of the reaction tank 18 through the opening 18 f at the upper part of the reaction tank 18.

  The discharge port 26c of the powder hopper 26 is provided with a cover 75 that prevents the powder from dropping when not in use or when the powder hopper 26 is attached or detached. The cover 75 is held in a state of being attached to the discharge port 26 c by an insertion portion 26 e formed in the discharge port 26 c of the powder hopper 26 and a cover support shaft 77. The cover support shaft 77 is installed on stays 63 and 63 that support the powder hopper 26. When attaching the cover 75, the cover 75 is inserted into the insertion portion 26e, the cover 75 is hooked on the cover support shaft 77, and further fixed with the butterfly bolt 76.

A feeding shaft 68 is supported at the lower part of the powder hopper 26. One end of the feeding shaft 68 is extended from the powder hopper 26, and a sprocket 69 is fitted on the end. A chain 67 is wound between the sprocket 69 and the sprocket 45 b fitted to the output shaft 45 a of the feeding motor 45, and the power of the feeding motor 45 is transmitted to the feeding shaft 68.
The two sprockets 45b and 69 and the chain 67 are covered with a cover 64 for protection.

  Inside the powder hopper 26, a feeding roller 70 is fitted on the feeding shaft 68. The feeding roller 70 is a cylindrical body having a plurality of recesses 70a, 70a,. When the feeding roller 70 rotates, the powder (medicine) filled in the recesses 70 a, 70 a... Of the feeding roller 70 is quantitatively fed and falls from the powder hopper 26. The powder fed from the powder supply device 25 falls above the stirring unit M of the reaction tank 18.

Further, the powder hopper 26 is provided with a clog prevention body 72 in order to prevent clogging of the powder. The clog prevention body 72 is a frame body having an H shape in plan view, and is fixed to a swing shaft 71 provided above the feeding shaft 68 via an arm 72a.
One end portion of the swing shaft 71 is extended from the powder hopper 26, and a crank arm 71a is fixed to the extended portion. Further, the end of the feeding shaft 68 on the side opposite to the end where the sprocket 69 is fitted is extended from the powder hopper 26, and the end of the crank arm 71 a is provided around the extended end. And a connecting rod 73 that connects the feeding shaft 68 is attached. Thereby, a crank mechanism is formed between the feeding shaft 68 and the swing shaft 71.

  Then, when the feeding shaft 68 rotates and the end of the connecting rod 73 on the side of the feeding shaft 68 rotates around the feeding shaft 68, the end of the connecting rod 73 on the side of the crank arm 71a moves up and down. The arm 71 a swings around the swing shaft 71. As a result, the swinging shaft 71 swings, and the clogging prevention body 72 fixed to the swinging shaft 71 via the arm 72a swings around the swinging shaft 71, and the powder inside the powder hopper 26 is The body is vibrated to prevent clogging of the powder inside the powder hopper 26.

  A brush 74 is fixed to the swing shaft 71 via an arm 74a. The end of the brush 74 is in contact with the feeding roller 70, and the brush 74 removes the powder adhered to the outer peripheral surface of the feeding roller 70 and the recess 70a. The brush 74 swings in conjunction with the swing shaft 71, so that the bending of the brush 74 is suppressed and acts effectively on the outer peripheral surface of the feeding roller 70.

  In the stirring device 12 having the above-described configuration, the treated water flowing into the stirring unit M of the reaction tank 18 from the inlet 29 is supplied into the reaction tank 18 by the powder supply device 25 while turning the stirring unit M. The chemical and liquid supply device 34 descends while being stirred with the chemical solution supplied into the reaction tank 18 and enters the reaction section N from below the partition wall 65. Then, the treated water that reaches the lower part of the reaction part N reacts with the chemical and the chemical solution, rises in the reaction part N while abutting against the turbulent flow generation projections 66, 66. The water is discharged to the outside and is sent to the separation tank 13.

Next, the structure of the stirring apparatus 12 which concerns on Example 2 is demonstrated.
FIG. 12 is a diagram showing an overall configuration of a water purification system according to an embodiment of the present invention, FIG. 13 is a plan view of a stirring device, FIG. 14 is a front view of the stirring device, and FIG. 15 is a front view of the powder supply device. FIG. 16 is a diagram showing the operation of the clogging prevention mechanism.

As shown in FIGS. 12 to 14, the stirring device 12 includes a reaction tank 18, a powder supply device 25, and a liquid supply device 34 provided on a frame 31 assembled in a box shape.
On the upper part of the frame 31, eyebolts 23, 23,... For lifting and moving the stirring device 12 are provided at the four corners. Further, a ladder 27 is provided on the side surface of the frame 31 in order to supply powder to the powder supply device 25 disposed on the upper portion of the frame 31.
A control panel 17 is disposed on the side of the frame 31. A controller (control unit) housed in the control panel 17 includes a sensor for detecting the amount of liquid in the reaction tank 18 and a powder supply device 25. The feed motor, the pump of the liquid supply device 34 and the electromagnetic valve, and the flow rate detection sensor of the flow meter 16 are electrically connected, and the control panel 17 may control their operation and read the measured value. it can.

The reaction tank 18 is composed of a cylindrical portion 18a having an upper opening and a conical portion 18b continuing to the lower portion thereof. An inflow port 29 is opened on a lower side surface from a substantially vertical center, and a discharge port 18c is opened on a bottom portion. .
The treated water pumped up by the submersible pump 14 disposed in the reservoir 11 is pumped into the reaction tank 18 through the inflow pipe 15 by the feed pressure of the submersible pump 14.
In the stirring device 12, in order to stir the liquid in the reaction tank 18, a liquid flow (swirl flow) is formed using the flow pressure of the liquid flowing into the reaction tank 18. The chemicals mixed in the treated water and the treated water are mixed in the reaction tank 18.

Further, the flange 18d provided at the discharge port 18c is connected to the flange 19a provided at one end of the discharge tube 19, and the discharge tube 19 is connected to the discharge port 18c. The discharge pipe 19 is led out from the stirring device 12 and connected to the inlet 20 of the separation tank 13. Further, a drain pipe 37 is connected to the discharge pipe 19.
The treated water in the reaction tank 18 is mixed with the chemical in the reaction tank 18 and stirred. For example, when a flocculant is mixed and stirred as a drug, the suspension in the treated water becomes a floc, and according to the principle of cyclone, it is classified toward the wall of the cone part 18b by centrifugal force when riding on a high-speed swirling flow, It is separated and discharged from the discharge port 18 c at the lower end of the conical portion 18 b, and sent to the separation tank 13 through the discharge pipe 19. Further, most of the fluid and fine particles in the reaction vessel 18 are pushed to the center of the conical portion 18b against the centrifugal force while turning.

A turbulent flow generation plate 28 is provided on the inner wall of the reaction tank 18. The turbulent flow generation plate 28 is a vertically long plate-like body fixed in a standing state from the inner wall of the reaction tank 18 toward the center of the cylindrical portion 18a. The swirl flow of the treated water generated in the reaction tank 18 abuts on the turbulent flow generating plate 28, thereby disturbing the flow, thereby effectively stirring the treated water and mixing the chemicals. ing.
In the present embodiment, one turbulent flow generation plate 28 is provided along the extending direction of the cylindrical portion 18a from the upper and lower approximate centers in the reaction tank 18 to the upper portion, but is not limited thereto. A plurality of turbulent flow generating plates 28 can be provided along the inner periphery of the reaction tank 18 or a plurality of short plate-like turbulent flow generating plates 28 can be provided.

  The liquid supply device 34 is disposed on the side of the reaction tank 18. Since the configuration of the liquid supply device 34 is the same as that of the first embodiment, a description thereof will be omitted.

The powder supply device 25 is provided above the reaction tank 18 and above the frame 31 constituting the stirring device 12. The powder supply apparatus 25 is disposed in a case 24 that can be attached to and detached from the frame 31 to prevent the influence of rain and the like.
As shown also in FIG. 15, the powder supply device 25 includes a powder hopper 26 that is filled with powder, a feed shaft 46 that is built in a feed pipe 47 that communicates with the lower portion of the powder hopper 26, and the feed shaft 46. The feed motor 45 rotates and the clogging prevention mechanism 41 for preventing clogging of the powder in the powder hopper 26 is constituted.

  The powder hopper 26 includes a cylindrical portion 26a and a conical portion 26b continuous to the lower portion thereof. A discharge port 26c formed at the lower end of the powder hopper 26 is opened in a feeding pipe 47 so that the powder in the powder hopper 26 is The body falls into the feeding tube 47. In the powder hopper 26, a clogging prevention net 40 is disposed between the powders, and the clogging prevention net 40 prevents the density of the powder in the powder hopper 26 from increasing as it goes downward. Therefore, powder clogging can be prevented.

The feed pipe 47 has a discharge port 47 a opened at the top of the reaction tank 18, and is arranged so that the powder in the feed pipe 47 falls into the reaction tank 18 from above the reaction tank 18.
A feeding shaft 46 is inserted into the feeding pipe 47, and a spiral blade 46 a is formed on the feeding shaft 46. When the feeding shaft 46 is rotationally driven by the feeding motor 45, the powder that has fallen into the feeding pipe 47 from the powder hopper 26 is quantitatively sent in the direction in which the outlet 47a of the feeding pipe 47 is located. Thus, the powder is fed out quantitatively from the outlet 47a and falls into the reaction tank 18.

  It should be noted that the position where the drug is dropped by the powder supply device 25 is determined so as to fall at a position slightly shifted from the center rather than the approximate center of the reaction tank 18 in a plan view. This is because the chemical and the treated water are more effectively agitated by dropping the chemical to a position slightly deviated from the center of the swirl vortex formed in the reaction tank 18.

As shown in FIGS. 15 and 16, the clogging prevention mechanism 41 is fixed to the feeding shaft 46 and rotates integrally with the feeding shaft 46, and a support fixed to the side surface of the powder hopper 26. 42 and a piston 43 inserted into the support 42.
The outer periphery 44a of the cam 44 is formed in a spiral shape, the minimum diameter portion and the maximum diameter portion are continuous, and a stepped portion 44b is formed therebetween.
The support 42 is fixed to the side surface of the conical portion 26 b of the powder hopper 26, and an annular insertion hole 42 a through which the piston 43 can be inserted is formed.
The piston 43 includes a body portion 43b and a head portion 43a having a larger diameter than the body portion 43b formed integrally therewith. The body 43b is inserted through the insertion hole 42a of the support 42 so as to be slidable up and down, and the head 43a is larger in diameter than the insertion hole 42a and is prevented from coming off when the head 43a contacts the support 42. . The lower end of the body 43b of the piston 43 is disposed so as to be able to contact the outer periphery 44a of the cam 44.

  When the cam 44 rotates with the rotation of the feeding shaft 46, the diameter of the outer periphery 44a of the cam 44 with which the lower portion of the piston 43 comes into contact changes, and the piston 43 gradually passes through the insertion hole 42a of the support 42. Slide upward. Then, as shown in FIG. 16A, the outer periphery 44a of the cam 44 with which the lower portion of the piston 43 is in contact passes through the portion where the diameter of the cam 44 is maximum, and the portion where the diameter of the cam 44 is minimum. In this step portion 44b, the diameter of the outer periphery 44a of the cam 44 suddenly changes from large to small, and as shown in FIG. The head 43a of 43 is abutted against the support body 42 vigorously and vibrates the support body 42. The vibration of the support 42 is transmitted to the powder hopper 26, and the powder hopper 26 is vibrated. This prevents the powder in the powder hopper 26 from being clogged by the vibration of the powder in the powder hopper 26.

  In the clogging prevention mechanism 41 described above, the powder hopper 26 is vibrated to prevent clogging of the powder, but power for feeding the powder is used to impart this vibration. Since no special power is required, it can be constructed inexpensively and compactly.

The figure which shows the whole structure of the water purification system which concerns on Example 1 of this invention. The side view which shows the structure of a separation tank. The side view which shows another form of a structure of a separation tank. The front view of a stirring apparatus. Front sectional drawing which shows the internal structure of a reaction tank. FIG. 6 is a cross-sectional view taken along line YY in FIG. 5. The front view which shows a liquid supply apparatus. The front view of a powder supply apparatus. The side view of a powder supply apparatus. Front sectional drawing which shows the internal structure of a powder supply apparatus. Side surface sectional drawing which shows the internal structure of a powder supply apparatus. The figure which shows the whole structure of the water purification system which concerns on the Example of this invention. The top view of a stirring apparatus. The front view of a stirring apparatus. The front view of a powder supply apparatus. The figure which shows the mode of operation | movement of a clogging prevention mechanism.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Water purification system 11 Reservoir 12 Stirrer 13 Separation tank 14 Submersible pump 14a Water permeable member 18 Reaction tank 25 Powder supply apparatus 28 Turbulence generating plate 29 Inlet 29a Introducing pipe 34 Liquid supply apparatus 41 Clogging prevention mechanism 65 Bulkhead 66 Disturbance Flow generation protrusion

Claims (11)

A water purification system comprising a stirrer for adding and mixing chemicals to treated water, and a separation tank for separating water from treated water,
The stirring device comprises a powder supply device, a liquid supply device, and a reaction tank, and a swirling flow is generated in the reaction tank by pumping treated water into the reaction tank. Processing system. A pump is used to pump the treated water to the stirring device, and a water permeable film is stretched at the water suction port of the pump.
The water purification system according to claim 1. A water purification system comprising a stirrer for adding and mixing chemicals to treated water, and a separation tank for separating water from treated water,
A water purification system comprising: a flow path formed by a partition plate inside the separation tank; and a water permeable member provided in the flow path. In the stirring device,
A partition is provided inside the reaction tank, and is divided into an outer peripheral part and an inner peripheral part communicating with each other at the lower part of the reaction tank,
Open the treated water inflow port to the reaction vessel on the outer periphery,
An outlet for treated water from the reaction tank is opened in the inner periphery,
The water purification system in any one of Claims 1 thru | or 3. The treated water is pumped into the reaction tank from the inflow port with a circumferential downward angle.
The water purification system according to claim 4. Providing a protrusion standing in the center direction on the inner wall of the partition wall,
The water purification system of Claim 4 or Claim 5. In the stirring device,
A plate-like body standing in the center direction is provided on the inner wall of the reaction tank.
The water purification system in any one of Claims 1 thru | or 3. In the powder supply device,
A hopper for loading powder;
A pay-out shaft supported at the bottom of the hopper;
A feeding roller that is externally fitted to the feeding shaft inside the hopper and has a recess formed in the outer periphery;
A motor for driving the feeding shaft,
The water purification system in any one of Claims 1 thru | or 3. A frame body is provided in the hopper,
The frame body is fixed to the swing shaft,
The swing shaft is provided in the hopper so as to be substantially parallel to the feeding shaft,
Provide a crank mechanism between the swinging shaft and the feeding shaft,
The water purification system according to claim 8. A brush that contacts the outer peripheral surface of the feeding roller is provided in the hopper,
The brush is fixed to the swing shaft,
The swing shaft is provided in the hopper so as to be substantially parallel to the feeding shaft,
A crank mechanism is provided between the swing shaft and the feeding shaft.
The water purification system according to claim 8. The powder supply device;
A hopper for loading powder, a feeding pipe connected to the lower end of the hopper, and a substantially horizontal feeding shaft that is built in the feeding pipe and is driven to rotate by a motor,
A support fixed to the side surface of the hopper;
A piston composed of a body portion slidably supported by the support body in a substantially vertical direction and a head portion capable of contacting the support body;
A cam that is externally fitted to the feed shaft, and whose outer shape is a spiral shape whose diameter from the center changes, and whose minimum diameter portion and maximum diameter portion are continuous;
A clogging prevention mechanism comprising:
The water purification system in any one of Claims 1 thru | or 3.

Images