JP2016019941A - Flow channel washing apparatus and filter washing facility including the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide: a flow channel washing apparatus capable of effectively producing washing performance by efficiently taking air into a fluid; and a filter washing facility including the flow channel washing apparatus.SOLUTION: A flow channel washing apparatus 11 is disposed in a midway of a flow channel pipe 6b and washes the flow channel pipe 6b by mixing air into a fluid passing through the flow channel pipe 6b. The flow channel pipe 6b has at least one or more aperture parts 25 with a small inner diameter at predetermined positions in a longitudinal direction of the flow channel pipe 6b. A blowout part 20b of an air inflow pipe 20 to intake air is disposed in the aperture parts 25 so as to be oriented in the longitudinal direction of the flow channel pipe 6b.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a flow path cleaning device in a sewer, a water supply, and the like, and a filter cleaning facility including the flow path cleaning device.

  Conventionally, as a device for cleaning flow pipes such as waterworks and sewers, a flow pipe in which a narrowed portion having a small inner diameter is formed at a predetermined position in the longitudinal direction, and an air inflow pipe communicating with the vicinity of the narrowed portion, There is a bubble generating device mainly constituted by (see, for example, Patent Document 1). According to this bubble generating device, the liquid flowing through the tube member has a high flow velocity due to the venturi effect when passing through the throttle portion. Then, using the negative pressure generated by this Venturi effect, the external air taken in from the air inflow pipe is naturally sucked into the pipe member, becomes fine bubbles, and is mixed and stirred with the washing water. It will flow to the downstream side of the road. And the dirt in a flow-path pipe line can be removed by the impact by the collision and burst of this bubble.

JP 2012-250176 A (page 4, FIG. 1)

  However, since the bubble generating device of Patent Document 1 has a configuration in which the open end of the air inflow pipe communicates perpendicularly to the radial direction of the flow path pipe, air is taken in a direction orthogonal to the liquid flow. As a result, there is a problem in that it cannot be efficiently dispersed in the flow channel tube and a sufficient cleaning effect cannot be obtained.

  The present invention has been made paying attention to such problems, and includes a flow path cleaning apparatus and a flow path cleaning apparatus capable of effectively taking air into a liquid and effectively exhibiting cleaning performance. An object is to provide a filter cleaning facility.

In order to solve the above problems, the flow path cleaning apparatus of the present invention is:
A flow path cleaning apparatus that is provided in the middle of a flow path pipe and cleans the flow path pipe by mixing air with the liquid flowing through the flow path pipe,
The flow channel tube is formed with at least one narrowed portion having a small inner diameter at a predetermined position in the longitudinal direction,
The blow-out part of the air inflow pipe for sucking air is arranged in the throttle part so as to face the longitudinal direction of the flow path pipe.
According to this feature, since the blow-out part of the air inflow pipe is arranged in the throttle part so as to face the longitudinal direction of the flow path pipe, air can be efficiently taken into the liquid with a simple structure, which is effective. The cleaning effect can be exhibited.

The blow-out part of the air inflow pipe is arranged in a portion of the minimum inner diameter in the throttle part.
According to this feature, the vent portion of the air inflow pipe is arranged at the minimum inner diameter portion of the throttle portion, so that the cross-sectional area through which the liquid in the throttle portion can pass is narrowed, thereby increasing the venturi effect and increasing the flow velocity. Can be achieved.

In order to solve the above problems, the filter cleaning equipment of the present invention is:
In a liquid conduit for flowing liquid from the primary side to the secondary side through the filter unit, the cleaning equipment is for cleaning the filter unit,
On the secondary side of the liquid conduit, a cleaning water supply pipe capable of flowing cleaning water into the filter unit is connected,
The flow path cleaning device is provided below the filter unit so that cleaning water can flow into the filter unit.
According to this feature, since the cleaning water can flow into the filter unit from the secondary side of the liquid conduit and below the filter unit, the entire filter unit can be effectively and efficiently cleaned. In addition, bubbles are mixed in the washing water flowing from below the filter unit by the flow path cleaning device, and the bubbles are diffused into the filter unit while being lifted by buoyancy. Thus, the filter unit can be cleaned.

The flow path cleaning device provided below the filter unit is connected to the cleaning water supply pipe through which cleaning water can flow into the filter unit.
According to this feature, cleaning water containing bubbles can also flow into the filter unit from the secondary side of the liquid conduit, and the cleaning effect is high.

It is the figure which showed typically the whole structure of the filter washing | cleaning apparatus in an Example, Comprising: The water sampling state is shown. 1 shows a flow path cleaning apparatus. 2 shows a filter cleaning method in a filter cleaning facility. The other example of the filter cleaning method in filter cleaning equipment is shown.

  EMBODIMENT OF THE INVENTION The form for implementing the flow-path washing | cleaning apparatus which concerns on this invention, and filter washing equipment provided with the same is demonstrated below based on an Example.

  A flow path cleaning apparatus and a filter cleaning facility including the same according to an embodiment will be described with reference to FIGS. 1 to 4. Hereinafter, the left side of the filter unit arranged in the center of the paper surface of FIG. 1, that is, the upstream side of the filter unit at the normal time is defined as the primary side of the liquid conduit, and the right side, that is, the downstream side of the filter unit at the normal time. It will be described as the next side.

  In the embodiment, the pipe cleaning method and apparatus of the present invention will be described by taking a wastewater treatment facility such as a sewage treatment plant for treating sewage as an example. In wastewater treatment facilities such as sewage treatment plants that treat sewage, the dirt of water is cleanly treated by the action of microorganisms and released into rivers and the sea. The sewage is mixed with various kinds of trash (hereinafter referred to as “contaminants”), and the contaminants are gradually removed during the treatment of the sewage. In the treatment process, various water quality meters and the like are installed for grasping the state of sewage and controlling it stably, and the measurement is automatically performed unattended. In order to measure water quality, sewage is sampled. However, if impurities are included, measurement is impossible or failure occurs, so a filter for removing impurities is installed in advance.

  In FIG. 1, the water quality meter 2 for grasping | ascertaining the state of the sewage in the reaction tank 1 of a waste water treatment facility is installed. Between the water quality meter 2 and the reaction tank 1, there is provided a liquid pipe 3 for guiding the sewage in the reaction tank 1 to the water quality gauge 2, and there is a reaction on the water quality meter 2 side in the middle of the liquid pipe 3. A suction pump 4 is provided for sucking sewage in the tank 1 and feeding it into the water quality meter 2.

  A filter unit 5 is provided on the suction side of the suction pump 4 in the liquid conduit 3, and the first side of the cleaning water supply pipe 6 is connected to the secondary liquid conduit 3 b between the filter unit 5 and the suction pump 4. The flow path side 6a is connected.

  The drain pipe 7 is provided with an opening / closing valve 8. The cleaning water supply pipe 6 is also provided with on-off valves 9 and 10. In this example, the on-off valves 8, 9, and 10 are each constituted by an electric valve.

  The filter unit 5 mainly includes a housing 15 and a filter 16 provided in the housing 15. In this example, the housing 15 has a substantially truncated cone shape whose upper part has a larger diameter than the lower part, and a substantially cylindrical filter 16 is installed so as to be positioned at the center thereof. A primary liquid conduit 3 a is connected to the upper outer diameter side of the housing 15 from the radial direction, and a secondary liquid conduit 3 b is connected to the center of the housing 15 from the vertical direction. In this example, a connection adapter 17 is provided so as to cover a connection portion between the housing 15 and the primary-side liquid conduit 3a and the secondary-side fluid conduit 3b.

  The filter 16 is provided with a plurality of flow holes 16a on the side surface and has an open top and bottom, and the top is connected to the secondary side liquid conduit 3b via the top of the housing 15 and the bottom. Is opened toward the drain pipe 7 and supported by the housing 15 so as to have a gap capable of discharging impurities between the bottom of the housing 15.

  FIG. 1 shows a state in which water is collected into the water quality meter 2, and in this water sampling state, the on-off valve 8 of the drain pipe 7 and the on-off valves 9, 10 of the cleaning water supply pipe 6 are closed. . Further, the suction pump 4 for feeding the sewage into the water quality meter 2 is driven. By this drive, the sewage in the reaction tank 1 is guided to the housing 15 of the filter unit 5 via the primary side liquid conduit 3a, and the filter Contaminants are filtered when passing from the outer peripheral side of the filter 16 to the inner peripheral side, and the filtered liquid passes through the liquid line 3b on the secondary side from the inner peripheral side of the filter 16 and passes through the suction pump 4 to the water quality meter. Led to 2.

  A flow path cleaning device 11 is disposed below the filter unit 5. The flow path cleaning device 11 includes a flow path pipe 6b and an air inflow pipe 20 that constitute the second flow path side of the cleaning water supply pipe 6, and the flow path pipe 6b has a partial inner diameter narrowed. Thus, the narrowed portion 25 is formed with a small diameter.

  As shown in FIG. 2, the narrowing portion 25 is formed in a predetermined length in the longitudinal direction of the flow channel pipe 6 b, gradually decreases in diameter from one side toward the center side, and on the other side with the minimum diameter portion as a boundary. The diameter gradually becomes larger. According to this, the wash water flowing down from the flow path pipe 6b is compressed when passing through the throttle portion 25, and the flow velocity becomes high due to the venturi effect. The restricting portion 25 is not limited to a structure that gradually becomes smaller in diameter as long as the diameter is smaller than the inner diameter of the portion other than the restricting portion 25 in the flow channel pipe 6b, and may be formed in a step shape.

  The air inflow pipe 20 is introduced from the upstream side (flow path pipe primary side 6b1) of the throttle part 25 in the flow path pipe 6b, and the pipe end part (hereinafter referred to as the air inflow pipe 20) located outside the flow path pipe 6b. In this way, air can be taken into the flow pipe 6b from the take-in portion 20a). Further, the side of the air inflow pipe 20 located inside the flow path pipe 6b is extended substantially parallel to the flow path pipe 6b toward the narrowing section 25, and the blowout section 20b at the end of the pipe is the narrowing section. 25 is disposed within the smallest diameter portion 25a.

  The blow-out portion 20b of the air inflow pipe 20 has an outer diameter smaller than the minimum inner diameter portion 25a of the throttle portion 25, and the minimum diameter portion 25a of the throttle portion 25 is equal to the outer diameter cross-sectional area of the air inflow tube 20. The cross-sectional area through which the washing water can pass is narrowed, and the above-mentioned venturi effect can be further enhanced.

  Next, an example of filter cleaning will be described with reference to FIG. In FIG. 3, the suction pump 4 for feeding sewage into the water quality meter 2 is in a stopped state, the on-off valve 8 of the drain pipe 7 is closed, and the on-off valves 9, 10 of the cleaning water supply pipe 6 are open. Is set to Then, when the wash water passes through the throttle portion 25, the air taken in from the intake portion 20a of the air inflow pipe 20 using the negative pressure (intake force) generated by the Venturi effect is passed through the flow path pipe 6b. The air is naturally sucked into the narrowed portion 25, becomes fine bubbles, is mixed and stirred with washing water, and is blown out to the flow channel secondary side 6b2.

  The washing water blown out from the flow channel pipe secondary side 6b2 and containing bubbles is guided from the flow channel pipe 6b to the housing 15 of the filter unit 5 through the opening / closing valve 9 of the washing water supply pipe 6. At this time, since the blowing portion 20b of the air inflow tube 20 is arranged in the throttle portion 25 so as to face the longitudinal direction of the flow channel tube 6b, the air is efficiently taken in the liquid with a simple structure and effectively cleaned. Can demonstrate ability.

  Wash water composed of fresh water supplied from the wash water supply pipe 6 is guided from the first flow path 6a of the wash water supply pipe 6 to the upper side of the housing 15 of the filter unit 5 through the secondary liquid pipe 3b. Then, it flows into the filter unit 5 from the second flow path 6 b of the cleaning water supply pipe 6. When the cleaning water from the first flow path 6a passes from the inner peripheral side of the filter 16 to the outer peripheral side, the filter 16 is cleaned, that is, back-washed, and contaminants attached to the filter 16 are peeled off, and the primary side liquid pipe It is discharged into the reaction tank 1 via the path 3a. Further, since the cleaning water flowing from the lower side of the filter unit 5 through the flow path pipe 6b contains a plurality of bubbles, the cleaning effect of the filter 16 is greatly enhanced by the impact caused by the collision and rupture of these bubbles. .

  Bubbles are mixed in the cleaning water flowing from the lower side of the filter unit 5 by the flow path cleaning device 11, and the bubbles rise with speed due to buoyancy and diffuse in the filter unit 5 over a wide range. The filter 16 can be effectively cleaned by the cleaning effect of the bubbles.

  Furthermore, the cleaning water containing bubbles flowing into the filter unit 5 from the second flow path 6b of the cleaning water supply pipe 6 collides with the cleaning water flowing from the first flow path 6a and the inner peripheral side and the outer peripheral side of the filter 16, respectively. By matching, a strong and diffusing flow can be generated, and impurities adhering to the filter 16 can be more efficiently separated. In addition, since the cleaning water flowing in from the first flow path 6a and the second flow path 6b is mixed, air bubbles reach the upper part in the housing 15 and the entire filter 16 can be efficiently cleaned. it can. By washing the filter as described above, it is possible to ensure measurement accuracy and prevent failure of the water quality meter 2 at the time of measurement in the water quality meter 2.

  FIG. 4 is a diagram showing another example of the filter cleaning method. In FIG. 4, the suction pump 4 for feeding sewage into the water quality meter 2 is in a stopped state, and the on-off valve 10 disposed on the upper side of the cleaning water supply pipe 6, that is, on the secondary liquid line 3 b side is opened. The on-off valve 8 of the drain pipe 7 and the on-off valve 9 of the cleaning water supply pipe 6 are set to the closed state.

  Therefore, since the on-off valve 8 of the cleaning water supply pipe 6 and the on-off valve 9 of the drain pipe 7 are closed, a part of the cleaning water flows from the first flow path 6a of the cleaning water supply pipe 6 to the secondary side liquid pipe. It flows directly into the channel 3b, and part of it flows into the channel pipe 6b, so that the channel pipe 6b is always filled with the washing water.

  The supplied cleaning water is guided from the first flow path 6 a of the cleaning water supply pipe 6 through the secondary liquid pipe 3 b into the housing 15 of the filter unit 5. At this time, the inside of the flow path pipe 6b becomes a negative pressure while being pulled by the first flow path 6a of the cleaning water supply pipe 6. Then, air is naturally sucked from the intake portion 20 a of the air inflow pipe 20 into the throttle portion 25 of the cleaning water supply pipe 6, and the taken-in bubbles are pulled toward the first flow path 6 a of the cleaning water supply pipe 6. As you can see. The air inflow pipe 20 is provided with a check valve 26 to prevent the washing water from flowing out of the air inflow pipe 20.

  The cleaning water containing bubbles thus joins with the cleaning water flowing through the first flow path 6a from the flow path pipe 6b, and is guided to the housing 15 of the filter unit 5 through the secondary liquid pipe path 3b. As described above, the cleaning water containing bubbles can be allowed to flow from the upper side of the filter unit 6 only by a combination of opening and closing the on-off valves 8, 9, 10 without preparing a separate device.

  Although the embodiments of the present invention have been described with reference to the drawings, the specific configuration is not limited to these embodiments, and modifications and additions within the scope of the present invention are included in the present invention. It is.

  For example, the configuration in which the cross-sectional area through which the cleaning water can pass in the minimum diameter portion 25a of the throttle portion 25 is not limited to the adjustment of the inner diameter of the throttle portion 25, but is blown out from the air inflow pipe 20 disposed in the throttle portion 25. You may implement | achieve by making the outer diameter of the part 20b into a large diameter.

  Moreover, in the said Example, although the filter washing | cleaning apparatus 1 was demonstrated taking the case of waste water treatment facilities, such as a sewage treatment plant which processes sewage, the filter washing | cleaning apparatus of this invention is not limited to this, Water supply etc. May be used.

  Moreover, in the said Example, although the flow-path washing | cleaning apparatus 11 demonstrated by the structure installed in the filter washing | cleaning apparatus 1, the flow-path washing apparatus of this invention is not limited to this, It is installed in a sewer piping or a waterworks piping. Then, it may be used in an apparatus for cleaning the inside of these pipes.

  Further, the flow path cleaning device 11 is not limited to the one mainly constituted by a part of the cleaning water supply pipe 6 and the air inflow pipe 20, and for example, is replaced with a part of the cleaning water supply pipe 6. A pipe member may be used. Furthermore, the restricting portion 25 is not limited to one configured by reducing the diameter of a part of the cleaning water supply pipe 6. For example, a separate pipe member having a relatively small diameter with respect to the cleaning water supply pipe is connected to the pipe. May be configured.

  Moreover, if the blowing part 20b of the air inflow pipe 20 is disposed in the throttle part 25 having a gradually decreasing diameter, the cross-sectional area through which the washing water can pass in the throttle part 25 becomes narrow, and the venturi effect can be further enhanced. Therefore, it is not necessarily arranged in the minimum inner diameter portion 25a of the throttle portion 25.

  In addition, the flow path cleaning device 11 is not limited to the configuration provided in the flow path pipe 6b, but may be provided only on the first flow path 6a side, or two or more in the cleaning water supply pipe 6 may be provided. A plurality may be provided.

  Further, the flow path cleaning device 11 may not be configured using the cleaning water supply pipe 6 as long as the flow path cleaning apparatus 11 is provided below the filter unit 5. For example, the cleaning water is supplied to the secondary side liquid pipe 3 b. You may comprise using the washing water supply piping and the flow-path pipe provided separately.

  In addition, the restricting portion 25 is not limited to the configuration provided in the flow path pipe 6b, and may be provided in the vicinity of two or more, for example. According to this, for example, bubbles contained in the liquid at the most upstream restricting portion are accelerated in moving speed at the restricting portion on the downstream side, and the bubbles can be carried farther.

DESCRIPTION OF SYMBOLS 1 Reaction tank 2 Water quality meter 3 Liquid pipe line 3a Primary side liquid pipe line 3b Secondary side liquid pipe line 4 Suction pump 5 Filter unit 6 Washing water supply pipe 6a Washing water supply pipe First flow path 6b Flow path pipe ( Washing water supply piping second channel)
6b1 Channel pipe primary side 6b2 Channel pipe secondary side 7 Drain pipe 8 Drain pipe on-off valve 9 Channel pipe on-off valve 10 Cleaning water supply pipe first flow on-off valve 15 Housing 16 Filter 17 Connection adapter DESCRIPTION OF SYMBOLS 11 Flow path washing | cleaning apparatus 20 Air inflow pipe 20a Air inflow pipe taking-in part 20b Air inflow pipe blowing-out part 25 Restriction part 25a Restriction part minimum inner diameter part 26 Check valve

Claims (4)

A flow path cleaning apparatus that is provided in the middle of a flow path pipe and cleans the flow path pipe by mixing air with the liquid flowing through the flow path pipe,
The flow channel tube is formed with at least one narrowed portion having a small inner diameter at a predetermined position in the longitudinal direction,
A flow path cleaning apparatus, wherein a blow-out part of an air inflow pipe for sucking air is arranged in the throttle part so as to be directed in a longitudinal direction of the flow path pipe.   The flow path cleaning apparatus according to claim 1, wherein the blow-out portion of the air inflow pipe is disposed at a portion having a minimum inner diameter in the throttle portion. In a liquid conduit for flowing liquid from the primary side to the secondary side through the filter unit, the cleaning equipment is for cleaning the filter unit,
On the secondary side of the liquid conduit, a cleaning water supply pipe capable of flowing cleaning water into the filter unit is connected,
3. The filter cleaning equipment according to claim 1, wherein the flow path cleaning device according to claim 1 or 2 is provided below the filter unit so that cleaning water can flow into the filter unit.   4. The filter cleaning according to claim 3, wherein the flow path cleaning device provided below the filter unit is connected to the cleaning water supply pipe through which cleaning water can flow into the filter unit. Facility.

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