JP2007021364A - Purification device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a purification device which is equipped with a minus ion generation member in the vicinity of an air bubble generation part to enable an increase in the amount of minus ions mixed in air bubbles discharged into water, and is free from the risk of submerging the minus ion generation member caused when water enters a pipe from the air bubble generation part. <P>SOLUTION: The purification device comprises a purification tank 1, an air bubble generator 2 having a pipe 3 introduced under the water surface in the purification tank 1, and converting air fed into the pipe 3 into air bubbles by discharging the air from the air bubble generation part 5 installed at the lower end of the pipe 3, and a fibrous electrode 61 installed under the water surface inside of the pipe 3. A check valve 7 for inhibiting the backflow of air in the pipe 3 is installed in the pipe 3 to make the inside of the pipe 3 unsubmerged, and the fibrous electrode 61 is disposed in the vicinity of the air bubble generation part 5 inside the pipe. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a purification device used for purifying waste water discharged from a kitchen such as a restaurant.

  Conventionally, as a purification device of this type, the inside of the septic tank is divided into a plurality of processing chambers communicating with each other at the lower portion, and each processing chamber is filled with water to be treated (suspension) and air disposed at the bottom of each processing chamber. A filter that generates bubbles from a filter has been proposed (see, for example, Patent Document 1). Suspended particles (emulsified oil particles) adhere to the bubbles and float upward, so that the oil is separated from the water to be treated. Moreover, since oxygen is supplied into the water by the bubbles, the activity of aerobic bacteria in the water is promoted and the oil is decomposed. In addition, various dissolved substances and insoluble substances adhere to the bubbles as well as oil.

Japanese Patent Laid-Open No. 9-122059

In the above-described purification apparatus, attempts have been made not only to generate bubbles but also to deodorize and sterilize by introducing ozone into the purification tank. However, since ozone has a harmful action, in recent years, the purification action by negative ions has attracted attention, and it has been proposed to increase the purification effect by mixing negative ions into bubbles.
Usually, the negative ion generator is provided outside the septic tank, and the negative ions generated outside are sent together with air to the inside of the septic tank through a conduit, and bubbles are formed into water at the bubble generating part provided at the tip of the conduit. discharge.

  However, when negative ions move in the conduit, they react with the gas in the conduit, so that there is a problem that the amount of negative ions mixed in the bubbles released into the water is greatly reduced. In order to solve this problem, it is conceivable to provide a negative ion generating member near the bubble generating part. However, when air supply into the conduit is stopped, water enters the conduit from the bubble generating part. There is a problem that the generating member is immersed in water and the function is lowered. Therefore, even if the negative ion generating member is installed inside the conduit, it cannot be installed below the water surface, and the negative ion generating member cannot be provided in the immediate vicinity of the bubble generating unit.

  The present invention has been made paying attention to the above-described problems, and can provide a negative ion generating member in the vicinity of the bubble generating portion to increase the amount of negative ions mixed in the bubbles released into the water. Another object of the present invention is to provide a purification device in which water does not enter the conduit from the bubble generating portion and the negative ion generating member is not immersed in water.

  The purification apparatus according to the present invention includes a purification tank having an introduction portion of treated water and a discharge portion of treated water, and a conduit led to the lower surface of the water inside the purification tank, and the air fed into the conduit is supplied to the conduit. It comprises a bubble generating device that is sent out from a bubble generating portion provided at the lower end to form bubbles, and a negative ion generating member provided at a position below the water surface in the conduit. The conduit is provided with a check valve that prevents the backflow of air in the conduit to form the interior of the conduit in a non-water-immersed state, and the negative ion generating member is disposed near the bubble generating portion in the conduit. It is arranged.

In the above-described configuration of the present invention, the “bubble generating portion” can be formed by connecting a tubular body provided with a plurality of vent holes to the distal end of the conduit. You may make it open the ventilation hole directly.
There are various “check valves”, and an electromagnetic valve can also be used as the check valve. In this case, when the air is sent into the conduit, the electromagnetic valve is opened. When the air supply to the conduit is stopped, the solenoid valve is closed in conjunction with this to prevent the back flow of air in the conduit. The “check valve” can be provided at an appropriate position of the conduit, and the installation position is not limited.

  In the purification apparatus having the above-described configuration, the water to be treated is introduced into the purification tank from the introduction unit and filled. When air is fed into the conduit, bubbles are generated at the bubble generating section and a large number of bubbles are released into the water. Suspended particles adhere to the bubbles and float upward in the water, so that the oil is separated from the water to be treated and the lower water in the septic tank is purified. Moreover, since oxygen is supplied into the water by the bubbles, the activity of aerobic bacteria in the water is promoted and the oil is decomposed. Furthermore, since negative ions are mixed into the bubbles, the purification effect is further enhanced. The treated water is led out of the septic tank from the lead-out part.

  A check valve is provided in the conduit so that the inside of the conduit is always in a non-water-immersed state, and a negative ion generating member is disposed near the bubble generating portion inside the conduit to generate negative ions. Immediately after the occurrence, the bubbles are mixed in the bubbles immediately from the generation without being moved for a long time and discharged into the water. For this reason, negative ions do not react with the gas in the conduit, the amount of negative ions mixed in the bubbles increases, and the purification effect is improved. In addition, since the negative ion generating member is arranged by always forming the inside of the conduit in a non-water-immersed state by the check valve, even if the air supply is stopped, there is no possibility that the negative ion generating member will be immersed in water, generating negative ions. Does not reduce the function of the member.

  In a preferred embodiment of the present invention, the negative ion generating member is constituted by a fibrous electrode formed by bundling metal fibers and connected to a positive electrode of a high voltage generating circuit. When a high voltage is applied to this fibrous electrode and electric energy is applied, a large amount of electrons are discharged into the air from the tips of the needles of each metal fiber due to discharge, and these electrons become moisture in the air. Acts to generate a large amount of negative ions. The negative ion generating member is not necessarily limited to the fibrous electrode as long as it can be provided inside the conduit. However, when the fibrous electrode of this embodiment is employed, the high voltage generating circuit It has been confirmed that a large amount of negative ions is generated simply by connecting a fibrous electrode only to the positive electrode and grounding the negative electrode at an appropriate place. For example, when using a needle electrode, it is necessary to wire the positive electrode and the negative electrode of the high voltage generation circuit to the needle electrode, respectively, whereas when using a fiber electrode, the positive electrode is connected to the positive electrode. Since only the lead wire needs to be introduced into the conduit, the wiring structure in the conduit is simplified.

  In one embodiment of the present invention, the inside of the septic tank is partitioned into a plurality of processing chambers communicating with each other at the bottom, and the conduits of the bubble generating device are respectively guided below the water surface in each of the processing chambers. The bubble generating part is provided at the lower end part, and the negative ion generating member is disposed in the vicinity thereof. According to this embodiment, the purification treatment is performed stepwise in each treatment chamber, and the sequentially purified water reaches the final treatment chamber and is led out of the purification tank from the outlet.

  In a preferred embodiment of the present invention, the conduit includes a first pipe that communicates with the blower and is located above the water surface, and a second pipe that is detachably connected to the first pipe. The second tube is guided under the water surface, the bubble generating portion is provided at the lower end portion thereof, and the negative ion generating member is disposed in the vicinity thereof. According to this embodiment, when the negative ion generating member is consumed and needs to be replaced, the negative ion generating member can be easily replaced by removing the second tube from the first tube.

  According to this invention, since the negative ion generating member is provided in the vicinity of the bubble generating portion inside the conduit, the amount of negative ions mixed in the bubbles released into the water can be increased. In addition, since the conduit is provided with a check valve so that the inside of the conduit is not submerged, there is no risk that water will enter the conduit from the bubble generating part and the negative ion generating member will be submerged. Does not degrade the function.

1 and 2 show the configuration of a purification apparatus according to one embodiment of the present invention.
The purification device in the illustrated example is used to purify waste water discharged from a restaurant kitchen as treated water. The purifying tank 1 introduces treated water and purifies it, and a large number of bubbles. And a bubble generating device 2 for generating and discharging into the water filled in the septic tank 1. In addition, the purification apparatus of this invention can be applied not only to the treatment of waste water from a kitchen but also to treatment of other waste water or waste liquid or sewage.
An introduction pipe 11 for introducing the water to be treated into the septic tank 1 is provided on one side wall of the septic tank 1. The leading end of the introduction pipe 11 is an inlet 12 for water to be treated and is located above the water surface of the septic tank 1.

The inside of the septic tank 1 is partitioned into a plurality of treatment chambers 10a, 10b, and 10c by a plurality of partition walls 15 and 16. A first processing chamber 10 a is located below the introduction port 12. The first processing chamber 10 a and the second processing chamber 10 b communicate with each other below one partition wall 15, and the second processing chamber 10 b and the third processing chamber 10 c communicate with each other below the other partition wall 16. is doing.
In the third treatment chamber 10c, a lead-out pipe 13 for leading the treated water to the outside of the septic tank 1 is provided. The lower end of the outlet pipe 13 is an outlet 14 for treated water, and the outlet 14 is located near the bottom surface of the septic tank 1.

  The bubble generating device 2 includes a blower 20 disposed outside the septic tank 1 and a synthetic resin conduit 3 that guides the air fed from the blower 20 to the vicinity of the bottom inside the septic tank 1. The conduit 3 includes a main pipe 30 that communicates with the blower 20 and branch pipes 4 a, 4 b, and 4 c that branch from the main pipe 30. The main pipe 30 is arranged horizontally above the water surface of the septic tank 1 and branches downward at positions corresponding to the first to third processing chambers 10a to 10c. Each branch pipe 4a-4c is connected to each branch part 31a-31c via connection pipe 40a-40c, respectively. Each of the branch pipes 4a to 4c extends directly from above the water surface to near the bottom below the water surface. Air diffuser tubes 50a to 50c constituting the bubble generating unit 5 are connected to lower ends of the branch tubes 4a to 4c, respectively.

Each of the air diffusers 50a to 50c is set to a length corresponding to the width of the septic tank 1, and is connected to the lower end of each branch pipe 4a to 4c so as to be parallel to the bottom surface of the septic tank 1. A plurality of vent holes 51 are formed in the outer peripheral surface of each of the air diffusers 50a to 50c. When the air sent into the conduit 3 exits from the air holes 51, it becomes bubbles and is released into the water.
In this embodiment, in order to facilitate maintenance and inspection, the branch pipes 4a to 4c are detachable from the main pipe 30. However, as shown in FIG. 3, each branch pipe 4a is integrated with the main pipe 30. ~ 4c can also be formed.

FIG. 4 shows a state where the branch portion 31a of the main pipe 30 and the branch pipe 4a are connected by the connecting pipe 40a. In addition, the connection structure of the other branch parts 31b and 31c and the other branch pipes 4b and 4c is the same, and illustration and description are omitted here.
As shown in FIG. 5 (1), the lower end portion of the branch portion 31a has a narrow outer shape, and can be inserted into the inner hole of the upper end portion of the branch pipe 4a shown in FIG. 5 (2). It has become. When the lower end portion of the branch portion 31a is inserted into the inner hole of the upper end portion of the branch pipe 4a, the branch portion 31a and the branch pipe 4a communicate with each other in an airtight state. In order to improve airtightness, a seal member such as an O-ring may be interposed between the branch part 31a and the branch pipe 4a.
The outer peripheral surfaces of the branch part 31a and the branch pipe 4a are formed with screws 32 and 42 that are continuous with each other when the branch part 31a is correctly inserted into the inner hole of the branch pipe 4a. By screwing the screw 41 formed on the inner surface of the connecting pipe 40a into the continuous screws 32 and 42, the branch portion 31a and the branch pipe 4a are connected by the connecting pipe 40a and the connected state is maintained.

  On the inner surface of the main pipe 30, a thick portion 33 reaching the branch portions 31a to 31c is formed. Three insertion holes 34 for passing three lead wires 62, 71, 72 (shown in FIG. 1) are formed in the thick portion 33. Three connection pins 35 to which the lead wires 62, 71, 72 are connected protrude from the end faces of the branch portions 31a to 31c.

  A similar thick portion 43 is also formed on the inner surfaces of the branch pipes 4a to 4c. Three insertion holes 44 for passing three lead wires 64, 73, 74 (shown in FIG. 1) are formed inside the thick portion 43. Three sockets 45 to which the lead wires 64, 73, 74 are connected are provided on the end faces of the branch pipes 4a to 4c. By connecting and inserting the connection pin 35 into each socket 45, the lead wires 62, 71, 72 passing through the main pipe 30 and the lead wires 64, 73, 74 passing through the branch pipes 4a-4c are brought into conduction. Further, the screws 32 and 42 described above continue at an angular position where the three connection pins 35 are inserted into the three sockets 45.

  Two lead wires 71 and 72 passing through the main pipe 30 are drawn out from a solenoid valve starting device 70 described later. The other lead wire 62 passing through the main pipe 30 is drawn from a high voltage generation circuit 60 described later. On the other hand, the two lead wires 73 and 74 passing through the branch pipes 4a to 4c are connected to the check valve 7 described later, and the other lead wire 64 is connected to the fibrous electrode 61 of the negative ion generator 6 described later. Each is connected.

  The piping structure of the conduit 3 shown in FIGS. 1 and 2 is applied to a relatively small septic tank 1, and if the area of the septic tank 1 is large, the number of branches and the number of branch pipes are increased. . For example, the embodiment shown in FIG. 6 includes a main pipe 30 communicating with the blower 20, first branch pipes 4A to 4D branched from the main pipe 30, and second branch pipes further branched from the branch pipes 4A to 4D. 47, 48, 49. The main pipe 30 and the first branch pipes 4A to 4D are located above the water surface of the septic tank 1, and further branch at positions corresponding to the first to third treatment chambers 10a to 10c. In each branch portion from the first branch pipes 4A to 4D, the second branch pipes 47, 48, and 49c are respectively connected via connection pipes (not shown) having the same configuration as the connection pipes 40a to 40c described above. It is connected. Each branch pipe 47, 48, 49 extends to near the bottom part below the water surface, and diffuser pipes 50A to 50D constituting the bubble generating part 5 are connected to the respective lower end parts.

Returning to FIG. 1, check valves 7 for preventing the backflow of air inside the branch pipes 4 a to 4 c are provided inside the lower ends of the branch pipes 4 a to 4 c, respectively. In this embodiment, each check valve 7 is installed at a position below the water surface, but may be installed above the water surface, and the installation position is not limited. Each check valve 7 forms a non-immersed state in which water does not enter the branch pipes 4a to 4c. In this embodiment, an electromagnetic valve is used as the check valve 7, and when the blower 20 stops driving, the electromagnetic valve activation device 70 receives the stop signal i from the blower 20 and closes the check valve 7. . By the closing operation of the check valve 7, the internal pressure of the conduit 3 is maintained, and the pressure prevents the water from entering from the vent holes 51 of the diffuser tubes 50a to 50c.
When receiving the start signal j from the blower 20, the electromagnetic valve starting device 70 opens the check valve 7. As a result, the air sent from the blower 20 to the conduit 3 is sent out from the vent holes 51 of the diffuser tubes 50a to 50c to be bubbled.

  In addition, it is not always necessary to use a solenoid valve as the check valve 7, for example, a general-purpose check valve, that is, when air pressure of a certain level or more is applied, the valve is opened in a direction in which the air pressure acts, and air is allowed to pass through. For the air pressure in the reverse direction, it is possible to use a check valve having a structure in which the valve is closed and air does not pass therethrough.

  Inside the lower ends of the branch pipes 4 a to 4 c, the fibrous electrodes 61 of the negative ion generator 6 are respectively arranged in the vicinity of the bubble generator 5, and the negative ion generator 8 is formed. The negative ion generator 6 includes a high voltage generation circuit 60 and a fibrous electrode 61 disposed in each of the branch pipes 4a to 4c. The high voltage generation circuit 60 converts an AC voltage (100 volts) into a predetermined DC voltage, and boosts the DC voltage obtained by the conversion circuit to a predetermined high voltage (several hundreds to thousands of volts). And a booster circuit. In the high voltage generating circuit 60, the negative electrode is grounded at an appropriate place, and the fibrous electrodes 61 are connected to the positive electrode via the lead wires 62 and 64.

Each fibrous electrode 61 is formed by bundling metal fibers (for example, a stainless wire processed into a fiber having a diameter of several microns), and the tip of each metal fiber has a needle shape. In order to manufacture the fibrous electrode 61, first, copper plating is applied to the peripheral surface of a stainless steel wire to bundle a large number of wires, and then each stainless steel wire is stretched until its diameter becomes several microns. Next, the target fibrous electrode 61 is obtained by performing an etching process to peel off the copper plating on the peripheral surface. By simply connecting the fibrous electrode 61 to the positive electrode of the high voltage generating circuit 60 and applying a high voltage, a large amount of electrons are emitted, and the electrons act on moisture in the air to generate negative ions.
The high voltage generation circuit 60 may control the operation by itself, but may receive the start signal j and the stop signal i from the blower 20 and interlock with the operation of the blower 20.

In the purification apparatus having the above-described configuration, the water to be treated is introduced into the septic tank 1 from the introduction port 12 and filled to a certain water level. When air is sent from the blower 20 to the conduit 3, the air is sent out from the vent holes 51 of the diffuser tubes 50a to 50c in the processing chambers 10a to 10c to form a large number of bubbles. Suspended particles and insoluble particles adhere to the bubbles and float up upward in the water, so that oil and insoluble substances are separated from the water to be treated, and the lower water in the septic tank 1 is purified. Further, since oxygen is supplied into the water by the bubbles, the activity of aerobic bacteria in the water is promoted and the oil is decomposed. Furthermore, since the high voltage generated by the high voltage generation circuit 60 is applied to each fibrous electrode 61, the fibrous electrode 61 generates negative ions, which are mixed into bubbles, so that the purification effect is further enhanced.
The purification process described above is performed in stages in the first to third processing chambers 10a to 10c. The sequentially purified water reaches the final treatment chamber 10c and is purified there, and then is discharged as treated water from the outlet 14 to the outside of the septic tank 1.

In this purification device, the inside of the conduit 3 is always formed in a non-water-immersed state, and the fibrous electrode 61 is arranged in the vicinity of the bubble generating portion 5 inside the conduit to generate negative ions. The air bubbles are mixed into the air bubbles from the air bubble generating unit 5 and discharged into the water. For this reason, the amount of negative ions mixed in the bubbles increases, and the purification effect is improved.
The blower 20 is generally driven during the work hours of the kitchen and stopped at night when the work is suspended, but the check valve 7 is closed and the internal pressure is maintained during the period when the air supply is suspended. Therefore, water does not enter the inside of the conduit 3. As a result, the fibrous electrode 61 disposed in the vicinity of the bubble generating portion 5 inside each branch pipe 4a to 4c of the conduit 3 is not immersed in water, and the function of the fibrous electrode 61 is not deteriorated.

It is explanatory drawing which showed the structure of the water purifier which is one Example of this invention with the block and the longitudinal cross-section of the septic tank. It is the top view which looked at the septic tank from the upper part. It is explanatory drawing which shows another Example. It is a perspective view which shows the connection structure of the main pipe and branch pipe of a conduit. (1) is a perspective view showing the structure of the branch portion of the main pipe, (2) is a perspective view showing the structure of the branch pipe. It is a top view which shows the other piping example of a conduit | pipe.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Septic tank 2 Bubble generator 3 Conduit 4a-4c Branch pipe 5 Bubble generator 6 Negative ion generator 7 Check valve 8 Negative ion generator 10a-10c Processing chamber 12 Inlet 14 Outlet 20 Blower 61 Fibrous electrode

Claims (4)

A septic tank having an introduction part of treated water and a derivation part of treated water, and a conduit that is led under the surface of water inside the septic tank, and the air sent into the conduit is provided at the lower end of the conduit A bubble generating device that is sent out from the generating unit to form bubbles, and a negative ion generating member provided at a position below the water surface in the conduit,
The conduit is provided with a check valve that prevents backflow of air in the conduit to form the interior of the conduit in a non-immersed state, and the negative ion generating member is disposed in the vicinity of the bubble generating portion inside the conduit. Purifying device.   The purification apparatus according to claim 1, wherein the negative ion generating member is a fibrous electrode formed by bundling metal fibers and connected to a positive electrode of a high voltage generating circuit.   The inside of the septic tank is divided into a plurality of processing chambers communicating with each other at the bottom, and the conduits of the bubble generating device are respectively guided below the water surface in each processing chamber, and the bubble generating portions are respectively provided at the lower ends of the respective conduits. The purification apparatus according to claim 1, wherein the negative ion generation member is provided and disposed in the vicinity thereof. The conduit includes a first pipe that communicates with the blower and is positioned above the water surface, and a second pipe that is detachably connected to the first pipe, and the second pipe is below the water surface. The purification device according to any one of claims 1 to 3, wherein the purification device is guided and provided with the bubble generation portion at a lower end portion thereof and the negative ion generation member disposed in a vicinity thereof.

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