JP6915828B2 - Sewage treatment equipment - Google Patents

Description

The present invention relates to a sewage treatment apparatus.

The crushing and atomizing device described in Patent Document 1 includes an inflow pipe, a gas supply pipe, a compressor, an oxygen generator, and a crushing pipe. Sewage and the like flow into the inflow pipe. The gas supply pipe and the crushing pipe are connected to the downstream side in the flow direction of the sewage with respect to the inflow pipe. The oxygen generator generates oxygen. The compressor pumps oxygen and air generated by the oxygen generator to the gas supply pipe. The gas supply pipe feeds air and oxygen into the crushing pipe.

Japanese Unexamined Patent Publication No. 2005-1806048

The crushing and atomizing device described in Patent Document 1 includes an oxygen generator and a compressor for feeding air and oxygen into the crushing pipe. Therefore, sewage can be efficiently purified. However, there is still room for improvement in the crushing and atomizing apparatus from the viewpoint of cost.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a sewage treatment apparatus capable of reducing manufacturing costs and running costs.

The sewage treatment apparatus disclosed in the present application includes a sewage pipe and an intake pipe. The sewage flows through the sewage pipe. The intake pipe sucks air into the sewage pipe by a negative pressure generated with the flow of the sewage in the sewage pipe. The sewage pipe has a plurality of crushing plates. The plurality of crushing plates subdivide the air bubbles contained in the sewage.

In the sewage treatment apparatus disclosed in the present application, the sewage pipe preferably includes a first sewage pipe, a second sewage pipe, and a connecting pipe. The first sewage pipe preferably includes a plurality of first crushing plates that subdivide the air bubbles contained in the sewage. The connecting pipe preferably connects the upper end of the second sewage pipe and the upper end of the first sewage pipe.

In the sewage treatment apparatus disclosed in the present application, it is preferable that the first sewage pipe and the second sewage pipe are arranged parallel to each other along a substantially vertical direction.

In the sewage treatment apparatus disclosed in the present application, it is preferable that the second sewage pipe has a plurality of second crushing plates for subdividing the air bubbles contained in the sewage.

In the sewage treatment apparatus disclosed in the present application, the connecting pipe is preferably U-shaped.

In the sewage treatment apparatus disclosed in the present application, the intake pipe is preferably connected to the connection pipe.

The sewage treatment apparatus disclosed in the present application preferably further includes a pump. It is preferable that the pump sucks up the sewage and press-fits the sewage into the second sewage pipe.

In the sewage treatment apparatus disclosed in the present application, it is preferable that the intake pipe includes an intake port and a regulating member. The intake port preferably sucks the air into the inside of the sewage pipe. The regulating member preferably regulates the intrusion of the sewage into the intake port.

The sewage treatment apparatus disclosed in the present application preferably further includes a guide member. The guide member preferably guides the direction of the flow of the sewage discharged from the sewage pipe.

In the sewage treatment apparatus disclosed in the present application, it is preferable that the sewage pipe has a drain port for discharging the sewage to the outside. The drain port is preferably arranged above the water surface of the sewage in the tank for storing the discharged sewage. The guide member preferably surrounds the drainage port. It is preferable that the upper end position of the guide member is higher than the position of the drain port, and the lower end position of the guide member is lower than the position of the water surface of the sewage in the tank.

According to the sewage treatment apparatus of the present invention, the manufacturing cost and the running cost can be reduced.

It is a figure which shows the structure of the sewage treatment apparatus which concerns on embodiment of this invention. It is a figure which shows the structure of the intake pipe. It is a figure which shows the structure of the guide member. It is a side view which shows the structure of the 1st sewage pipe. It is sectional drawing which shows the structure of the 1st sewage pipe. It is a perspective view which shows the 1st crushing plate. It is a figure which shows the structure of the 2nd sewage pipe. It is a graph which shows the change between the dissolved oxygen amount and the temperature of the sewage in a tank.

Hereinafter, embodiments of the present invention will be described with reference to the drawings (FIGS. 1 to 8). In the drawings, the same or corresponding parts are designated by the same reference numerals and the description is not repeated.

First, the configuration of the sewage treatment device 100 according to the embodiment of the present invention will be described with reference to FIG. FIG. 1 is a diagram showing a configuration of a sewage treatment device 100. The sewage treatment device 100 treats the sewage DW stored in the tank 1. As shown in FIG. 1, the sewage treatment device 100 includes a sewage pipe 2, an intake pipe 3, and a pump 4.

The tank 1 stores sewage DW. The tank 1 is formed, for example, in a bottomed cylindrical shape. The sewage DW may contain solid matter. The tank 1 is made of a material having strength and corrosion resistance such as FRP (Fiber-Reinforced Plastics).

Sewage DW flows through the sewage pipe 2. The sewage pipe 2 includes a first sewage pipe 21, a second sewage pipe 22, and a connecting pipe 23. The first sewage pipe 21 and the second sewage pipe 22 are arranged parallel to each other along a substantially vertical direction.

One side (upper side) end of the first sewage pipe 21 is connected to the connecting pipe 23. The other side (lower side) end of the first sewage pipe 21 functions as a drainage port 211. The sewage DW flows down from the drain port 211 to the tank 1.

One side (upper side) end of the second sewage pipe 22 is connected to the connecting pipe 23, and the other side (lower side) end of the second sewage pipe 22 is connected to the pump 4.

The connecting pipe 23 connects the upper end of the first sewage pipe 21 and the upper end of the second sewage pipe 22. Specifically, one end of the connecting pipe 23 is connected to the upper end of the first sewage pipe 21, and the other end of the connecting pipe 23 is connected to the upper end of the second sewage pipe 22. The connecting pipe 23 is U-shaped.

The intake pipe 3 sucks air into the sewage pipe 2 by the negative pressure generated by the flow of the sewage DW in the sewage pipe 2.

The pump 4 has a water absorption port 41 and a discharge port 42. The pump 4 sucks up the sewage DW in the tank 1 from the water suction port 41, and press-fits the sewage DW into the second sewage pipe 22 from the discharge port 42.

The sewage DW press-fitted into the second sewage pipe 22 by the pump 4 rises in the second sewage pipe 22 as shown in the direction F2, and flows into the first sewage pipe 21 via the connecting pipe 23. Then, the sewage DW descends in the first sewage pipe 21 as shown in the direction F1 and is discharged from the drain port 211 to the tank 1.

The sewage treatment device 100 further includes a guide member 5. Details of the guide member 5 will be described later with reference to FIG.

As described above with reference to FIG. 1, in the sewage treatment device 100 according to the present embodiment, the intake pipe 3 has the sewage pipe 2 due to the negative pressure generated by the flow of the sewage DW in the sewage pipe 2. Since air is sucked into the sewer, it is not necessary to install an oxygen generator and a compressor. Therefore, the sewage treatment device 100 can reduce the manufacturing cost and the running cost as compared with the form including at least one of the oxygen generator and the compressor.

Further, the pump 4 sucks up the sewage DW in the tank 1, feeds it into the second sewage pipe 22, and discharges the sewage DW from the drain port 211 to the tank 1 via the connection pipe 23 and the first sewage pipe 21. do. Therefore, the sewage DW can be circulated through the second sewage pipe 22, the connecting pipe 23, and the first sewage pipe 21 in order. Therefore, air bubbles in the sewage DW can be increased. As a result, the sewage DW can be efficiently purified by microorganisms.

Further, since the first sewage pipe 21 and the second sewage pipe 22 are arranged parallel to each other along the substantially vertical direction, the size of the sewage treatment device 100 in the horizontal direction can be reduced. Therefore, a plurality of sewage treatment devices 100 can be arranged close to each other in the tank 1. Therefore, air bubbles in the sewage DW can be further increased. As a result, the sewage DW can be purified more efficiently.

Further, since the connecting pipe 23 is U-shaped, the sewage DW pumped by the pump 4 can be smoothly guided to the first sewage pipe 21. Therefore, the pressure loss when the sewage DW passes through the connecting pipe 23 can be reduced. As a result, the power consumption of the motor that drives the pump 4 can be reduced, and the running cost can be further reduced.

Next, the configuration of the intake pipe 3 will be described with reference to FIGS. 1 and 2. FIG. 2 is a diagram showing the configuration of the intake pipe 3. As shown in FIG. 2, the intake pipe 3 includes an insect screen 31, an intake pipe main body 32, and a regulating member 33.

The intake pipe main body 32 is inserted into the connecting pipe 23. The intake pipe main body 32 sucks air into the connecting pipe 23 by the negative pressure generated by the flow of the sewage DW in the connecting pipe 23. The lower end of the intake pipe main body 32 is inserted to the downstream side in the flow direction F3 of the sewage DW with respect to a predetermined position. The predetermined position indicates, for example, the position of the sewage pipe 2 farthest from the water surface SW of the connecting pipe 23. The intake pipe main body 32 is formed in a cylindrical shape and has a first intake port 321 and a second intake port 322. The intake pipe main body 32 is made of, for example, a corrosion-resistant resin.

The first intake port 321 is an opening formed at the upper end of the intake pipe main body 32. Further, the first intake port 321 sucks air into the intake pipe main body 32 from the outside as shown by the direction FA due to the negative pressure generated by the flow of the sewage DW in the connecting pipe 23.

The insect net 31 covers the first intake port 321. The insect net 31 prevents insects and the like from invading the first air intake port 321. The insect net 31 is made of, for example, a corrosion-resistant resin.

The second intake port 322 is an opening formed at the lower end of the intake pipe main body 32. Further, the second intake port 322 sends out the air sucked from the first intake port 321 into the connecting pipe 23. As a result, air is sucked into the connecting pipe 23. The sewage DW flows in the connecting pipe 23 from the upper end side of the second sewage pipe 22 toward the upper end side of the first sewage pipe 21 as shown in the direction F3. The second intake port 322 opens toward the downstream side of the flow of the sewage DW. The angle θ3 formed by the opening surface of the second intake port 322 and the vertical direction is, for example, 45 degrees.

In the present embodiment, the regulating member 33 is a part of the pipe wall inserted into the connecting pipe 23 of the intake pipe main body 32, and is a pipe wall facing the upstream side of the flow of the sewage DW. The regulating member 33 regulates the inflow of sewage DW into the second intake port 322.

As described above with reference to FIGS. 1 and 2, in the present embodiment, the regulating member 33 regulates the inflow of sewage DW into the second intake port 322. Therefore, it is possible to prevent the sewage DW from flowing into the second intake port 322 to prevent the intake of air from the second intake port 322 from being hindered. As a result, the intake pipe 3 can efficiently suck air into the sewage pipe 2.

Further, since the intake pipe main body 32 is connected to the downstream side of the flow direction F3 of the sewage DW with respect to the highest position of the connection pipe 23, the connection pipe 23 is caused by the negative pressure generated by the flow of the sewage DW. Air can be inhaled efficiently.

Further, since the first intake port 321 is covered with the insect net 31, it is possible to prevent insects and the like from invading from the first intake port 321. As a result, it is possible to prevent organic substances such as insects from being mixed into the sewage DW.

Next, the configuration of the guide member 5 will be described with reference to FIG. FIG. 3 is a diagram showing the configuration of the guide member 5. In FIG. 3, sewage DW is accumulated up to the water surface SW in the tank 1. The drainage port 211 of the first sewage pipe 21 is arranged above the water surface SW of the sewage DW in the tank 1.

The guide member 5 guides the flow direction FD in the tank 1 of the sewage DW. Specifically, the guide member 5 surrounds the drain port 211. Further, the position of the upper end 51 of the guide member 5 is higher than the position of the drain port 211. The position of the lower end 52 of the guide member 5 is lower than the position of the water surface SW of the sewage DW in the tank 1. The position of the lower end 52 of the guide member 5 is, for example, a substantially central position between the position of the water surface SW of the sewage DW in the tank 1 and the bottom surface of the tank 1.

In the present embodiment, the guide member 5 is a cylindrical member and is made of a material having strength and corrosion resistance such as FRP or stainless steel. The inner diameter of the guide member 5 is larger than the outer diameter of the drain port 211 of the first sewage pipe 21. The guide member 5 is fixed to the sewage pipe 2 by a frame body (not shown).

As described above with reference to FIG. 3, in the present embodiment, since the guide member 5 guides the flow direction FD of the sewage DW in the tank 1, air bubbles are sent to the sewage DW in the tank 1. It can be contained almost uniformly. Therefore, the sewage DW in the tank 1 can be efficiently purified.

Further, since the position of the upper end 51 of the guide member 5 is higher than the position of the drain port 211 and the position of the lower end 52 of the guide member 5 is lower than the position of the water surface SW of the sewage DW in the tank 1, the water is discharged from the drain port 211. The sewage DW flows as follows. That is, the sewage DW discharged from the drain port 211 descends toward the bottom surface of the tank 1 as shown in the direction FD. Then, the sewage DW that has reached the bottom surface of the tank 1 spreads toward the peripheral surface of the tank 1. After that, the sewage DW that has reached the peripheral surface of the tank 1 rises along the peripheral surface of the tank 1. Then, the sewage DW that has reached the vicinity of the water surface SW flows toward the central portion of the tank 1 along the water surface SW. Therefore, convection of sewage DW can be formed in the tank 1. As a result, air bubbles can be more uniformly contained in the sewage DW in the tank 1. Therefore, the sewage DW in the tank 1 can be purified more efficiently.

Further, when the sewage DW discharged from the drain port 211 reaches the bottom surface of the tank 1, the sewage DW discharged from the drain port 211 agitates the sewage DW stored in the tank 1, so that fine bubbles are generated. Can be generated efficiently. Further, since the sewage DW discharged from the drain port 211 agitates the sewage DW stored in the tank 1, the precipitation of sewage contained in the sewage DW can be suppressed. Further, by separating the lower end 52 of the guide member 5 from the water absorption port 41 of the pump 4, it is possible to prevent the sewage DW discharged from the drain port 211 from reaching the water absorption port 41, so that fine bubbles can be efficiently generated. ..

Next, the configuration of the first sewage pipe 21 will be described with reference to FIGS. 1 and 4 to 6. FIG. 4 is a side view showing the configuration of the first sewage pipe 21. FIG. 5 is a cross-sectional view showing the configuration of the first sewage pipe 21. FIG. 6 is a perspective view showing the first crushed plate 6.

As shown in FIG. 4, the first sewage pipe 21 further includes a plurality of first crushing plates 6. Each of the plurality of first crushed plates 6 is a plate-shaped member made of a material having strength and corrosion resistance. Each of the plurality of first crushed plates 6 is made of, for example, stainless steel. The plurality of first crushing plates 6 subdivide air bubbles contained in the sewage DW. Each of the plurality of first crushing plates 6 is inclined by an angle θ1 with respect to the vertical direction and is fixed to the inner surface 213 of the first sewage pipe 21. The angle θ1 is, for example, 45 degrees.

The plurality of first crushing plates 6 have a plurality of sets of first crushing plate sets 6A. A plurality of sets of the first crushing plate sets 6A are arranged on the inner surface 213 of the first sewage pipe 21 along the flow direction F1 of the sewage DW. The first crushed plate set 6A is composed of a first crushed plate 61, a first crushed plate 62, a first crushed plate 63, and a first crushed plate 64. The four first crushed plates 61 to 64 are formed in substantially the same shape as each other.

The first crushed plate 61 and the first crushed plate 62 are arranged at positions facing each other, and the first crushed plate 63 and the first crushed plate 64 are arranged at positions facing each other. Further, the first crushed plate 63 and the first crushed plate 64 are arranged on the downstream side of the flow direction F1 of the sewage DW with respect to the first crushed plate 61 and the first crushed plate 62.

FIG. 5 is a VV cross-sectional view of the first sewage pipe 21 shown in FIG. As shown in FIG. 4, four first crushing plates 61 to 64 are fixed to the inner surface 213 of the first sewage pipe 21. The first crushing plate 64 is arranged at a position where the first crushing plate 61 is rotated by 90 degrees around the axis 21A of the first sewage pipe 21. The first crushed plate 62 is arranged at a position where the first crushed plate 64 is rotated by 90 degrees about the axis 21A. The first crushed plate 63 is arranged at a position where the first crushed plate 62 is rotated by 90 degrees about the axis 21A. The first crushed plate 61 is arranged at a position where the first crushed plate 63 is rotated by 90 degrees about the axis 21A. That is, the first crushed plate 61 and the first crushed plate 62 are arranged at point-symmetrical positions about the axis 21A. Further, the first crushed plate 63 and the first crushed plate 64 are arranged at point-symmetrical positions about the axis 21A.

FIG. 6 is a perspective view showing the first crushed plate 6. As shown in FIG. 6, the first crushed plate 6 is formed in a substantially triangular shape, and has a first side 6a, a second side 6b, a third side 6c, and a tip portion 6d. The first side 6a is formed in an arc shape and is fixed to the inner surface 213 of the first sewage pipe 21. Saw blade-shaped irregularities are formed on the second side 6b and the third side 6c. The tip portion 6d is located at the apex between the second side 6b and the third side 6c, and protrudes toward the axial center 21A of the first sewage pipe 21.

As described above with reference to FIGS. 1 and 4 to 6, the first sewage pipe 21 includes a plurality of first crushed plates 6, and the first crushed plate 6 is for air contained in the sewage DW. Subdivide the bubbles. Therefore, when the sewage DW flows through the first sewage pipe 21, air bubbles contained in the sewage DW can be subdivided. Therefore, a large amount of air bubbles can be contained in the sewage DW. As a result, the sewage DW can be efficiently purified.

Further, since the intake pipe 3 is connected to the sewage pipe 2 (connection pipe 23) on the upstream side in the flow direction of the sewage DW with respect to the plurality of first crushing plates 6, the air sucked by the intake pipe 3 The bubbles can be subdivided by a plurality of first crushing plates 6. Therefore, a larger amount of air bubbles can be contained in the sewage DW. As a result, sewage can be purified more efficiently.

Further, the first crushed plate 61 and the first crushed plate 62 are arranged at point-symmetrical positions about the axis 21A, and the first crushed plate 63 and the first crushed plate 64 are centered on the axis 21A. It is arranged in a point-symmetrical position. Further, the four first crushing plates 61 to 64 are fixed to the inner surface 213 of the first sewage pipe 21 at an angle θ1 with respect to the vertical direction. Therefore, a rotating flow centered on the axis 21A is generated in the sewage DW flowing through the first sewage pipe 21. Further, since the second side 6b and the third side 6c of the first crushing plate 6 are formed with saw blade-like irregularities, air bubbles in the sewage DW can be further subdivided. Therefore, a larger amount of air bubbles can be contained in the sewage DW. As a result, the sewage DW can be further purified.

Next, the configuration of the second sewage pipe 22 will be described with reference to FIGS. 1 and 4 to 7. FIG. 7 is a side view showing the configuration of the second sewage pipe 22.

As shown in FIG. 7, the second sewage pipe 22 further includes a plurality of second crushing plates 7. The plurality of second crushing plates 7 subdivide air bubbles contained in the sewage DW. Each of the plurality of second crushed plates 7 is a plate-shaped member made of a material having strength and corrosion resistance. Each of the plurality of second crushed plates 7 is made of, for example, stainless steel. Each of the plurality of second crushing plates 7 is inclined by an angle θ2 with respect to the vertical direction and is fixed to the inner surface 223 of the second sewage pipe 22. The angle θ2 is smaller than the angle θ1, and is, for example, 30 degrees.

The plurality of second crushing plates 7 have a plurality of sets of second crushing plate sets 7A. A plurality of sets of the second crushing plate sets 7A are arranged on the inner surface 223 of the second sewage pipe 22 along the flow direction F2 of the sewage DW. The second crushed plate set 7A is composed of a second crushed plate 71, a second crushed plate 72, a second crushed plate 73, and a second crushed plate 74. The four second crushed plates 71 to 74 are formed in substantially the same shape as each other.

The second crushed plate 71 and the second crushed plate 72 are arranged at positions facing each other, and the second crushed plate 73 and the second crushed plate 74 are arranged at positions facing each other. Further, the second crushed plate 73 and the second crushed plate 74 are arranged on the downstream side of the flow direction F2 of the sewage DW with respect to the second crushed plate 71 and the second crushed plate 72.

The second crushed plate 71 and the second crushed plate 72 are arranged at point-symmetrical positions about the axis 22A of the second sewage pipe 22, similarly to the first crushed plate 61 and the first crushed plate 62. .. The second crushed plate 73 and the second crushed plate 74 are arranged at point-symmetrical positions about the axis 22A of the second sewage pipe 22, similarly to the first crushed plate 63 and the first crushed plate 64. ..

Further, the second crushed plate 7 is formed in a substantially triangular shape like the first crushed plate 6, and has first to third sides. The first side is formed in an arc shape and is fixed to the inner surface 223 of the second sewage pipe 22. Saw blade-shaped irregularities are formed on the second and third sides.

As described above with reference to FIGS. 1 and 4 to 7, in the present embodiment, the plurality of second crushing plates 7 arranged in the second sewage pipe 22 are air bubbles contained in the sewage DW. Is subdivided. Therefore, the air bubbles in the sewage DW can be further subdivided. Therefore, a larger amount of air bubbles can be contained in the sewage DW. As a result, the sewage DW can be purified more efficiently.

Further, the second crushed plate 71 and the second crushed plate 72 are arranged at point-symmetrical positions about the axis 22A, and the second crushed plate 73 and the second crushed plate 74 are centered on the axis 22A. It is arranged in a point-symmetrical position. Further, the four second crushing plates 71 to 74 are fixed to the inner surface 223 of the second sewage pipe 22 at an angle θ2 with respect to the vertical direction. Therefore, a rotating flow centered on the axis 22A is generated in the sewage DW flowing through the second sewage pipe 22. Further, since the second side and the third side of the second crushed plate 7 are formed with saw blade-like irregularities, air bubbles in the sewage DW can be further subdivided. Therefore, a larger amount of air bubbles can be contained in the sewage DW. As a result, the sewage DW can be purified more efficiently.

Further, the angle θ2 is smaller than the angle θ1. Therefore, the pressure loss of the sewage DW flowing through the second sewage pipe 22 can be reduced. Therefore, the load on the motor that drives the pump 4 can be reduced. As a result, the power consumption of the motor that drives the pump 4 can be reduced, and the running cost can be further reduced.

Next, changes in the dissolved oxygen amount DO (Dissolved Oxygen) of the sewage DW in the tank 1 will be described with reference to FIGS. 1 to 8. FIG. 8 shows a graph G1 showing a change in the dissolved oxygen amount DO of the sewage DW in the tank 1 and a graph G2 showing a change in the temperature TM of the sewage DW in the tank 1. The horizontal axis of the graph G1 shows the operating time T of the sewage treatment apparatus 100, and the vertical axis shows the dissolved oxygen amount DO. The horizontal axis of the graph G2 shows the operating time T of the sewage treatment device 100, and the vertical axis shows the temperature TM.

As shown in the graph G2 of FIG. 8, the temperature TM is substantially constant at about 10 ° C. to 11 ° C. regardless of the operating time T. On the other hand, as shown in Graph G1, the dissolved oxygen amount DO increases with the lapse of the operating time T and saturates in about 70 minutes. Specifically, the dissolved oxygen amount DO rises from the initial value of 1.0 (mg-O / L) to 9.0 (mg-O / L) and becomes saturated. The saturated dissolved oxygen amount at 10 ° C. is 10.92 (mg-O / L). Therefore, according to the sewage treatment apparatus 100, the dissolved oxygen amount DO can be increased to a value close to the saturated dissolved oxygen amount. Therefore, the sewage treatment device 100 can effectively purify the sewage DW.

The embodiments of the present invention have been described above with reference to the drawings. However, the present invention is not limited to the above-described embodiment, and can be implemented in various aspects without departing from the gist of the present invention (for example, (1) to (5) shown below). The drawings are schematically shown mainly for each component for easy understanding, and the thickness, length, number, etc. of each component shown are different from the actual ones for the convenience of drawing creation. In some cases. Further, the shape, dimensions, and the like of each component shown in the above embodiment are merely examples, and are not particularly limited, and various changes can be made without substantially deviating from the configuration of the present invention.

(1) As described with reference to FIG. 1, the sewage pipe 2 includes the first sewage pipe 21, the second sewage pipe 22, and the connecting pipe 23, but the present invention is not limited thereto. Any form may be used as long as the sewage flows through the sewage pipe. For example, the sewage pipe may be formed in an arc shape. In this form, since it is not necessary to connect a plurality of pipes, the configuration of the sewage pipe can be simplified.

(2) As described with reference to FIGS. 1 and 2, the intake pipe 3 sucks air into the connecting pipe 23, but the present invention is not limited thereto. The intake pipe may be in a form in which air is sucked into the sewage pipe 2 by the negative pressure generated by the flow of the sewage DW in the sewage pipe 2. The intake pipe may be, for example, a form in which air is sucked into the first sewage pipe 21.

(3) As described with reference to FIGS. 1 and 2, the regulating member 33 is a part of the pipe wall inserted into the connecting pipe 23 of the intake pipe main body 32, but the present invention is limited to this. Not done. The regulating member may be in a form that regulates the inflow of sewage DW into the second intake port 322. The regulating member may be, for example, a plate-shaped member fixed to the pipe wall of the intake pipe main body 32. In this embodiment, by extending the plate-shaped member below the second intake port 322, the inflow of sewage DW into the second intake port 322 can be reliably suppressed.

(4) As described with reference to FIG. 3, the guide member 5 is fixed to the sewage pipe 2, but the present invention is not limited to this. The guide member may be in a form of guiding the flow direction of the sewage DW discharged from the sewage pipe 2. The guide member may be driven so that, for example, the upper end portion thereof is used as a fulcrum and the lower end portion thereof makes a circumferential motion in the tank 1. In this form, air bubbles can be more uniformly contained in the sewage DW in the tank 1.

(5) As described with reference to FIG. 3, the guide member 5 is a cylindrical member, but the present invention is not limited thereto. The guide member may be in a form that surrounds the drain port 311. The guide member may be, for example, a polygonal tubular member. Further, the guide member may be, for example, a truncated cone-shaped member.

The present invention can be used in the field of sewage treatment equipment.

100 Sewage treatment equipment 1 Tank 5 Guide member 2 Sewage pipe 21 1st sewage pipe 6 1st crushing plate 22 2nd sewage pipe 7 2nd crushing plate 23 Connection pipe 3 Intake pipe 31 Insect repellent net 32 Intake pipe body 33 Regulatory member 4 Pump DW sewage SW water surface

Claims (8)

A sewage treatment device that treats sewage
The sewage pipe through which the sewage flows and
An intake pipe that sucks air into the sewage pipe due to the negative pressure generated by the flow of the sewage in the sewage pipe.
A guide member for guiding the direction of the flow of the sewage discharged from the sewage pipe toward the bottom surface of the tank for storing the sewage is provided.
The sewerage pipe, have a plurality of grinding plates subdividing bubbles of the air contained in the wastewater,
The sewage pipe has a drainage port for discharging the sewage to the outside.
The drainage port is arranged above the surface of the sewage in the tank.
The guide member is a cylindrical member and has a cylindrical shape.
The guide member surrounds the drainage port and forms a guide member.
The upper end position of the guide member is higher than the position of the drain port.
A sewage treatment device in which the lower end position of the guide member is lower than the position of the water surface of the sewage in the tank. The sewage pipe includes a first sewage pipe, a second sewage pipe and a connecting pipe.
The first sewage pipe includes a plurality of first crushing plates that subdivide the air bubbles contained in the sewage.
The sewage treatment device according to claim 1, wherein the connecting pipe connects the upper end of the first sewage pipe and the upper end of the second sewage pipe. The sewage treatment apparatus according to claim 2, wherein the first sewage pipe and the second sewage pipe are arranged in parallel with each other along a substantially vertical direction. The sewage treatment apparatus according to claim 2 or 3, wherein the second sewage pipe has a plurality of second crushing plates for subdividing the air bubbles contained in the sewage. The sewage treatment device according to any one of claims 2 to 4, wherein the connecting pipe is U-shaped. The sewage treatment device according to claim 5, wherein the intake pipe is connected to the connecting pipe. The intake pipe
An intake port that sucks the air into the sewage pipe and
The sewage treatment apparatus according to any one of claims 1 to 6, further comprising a regulating member that regulates the inflow of the sewage into the intake port. It has a water inlet and a discharge port to which one end of the sewage pipe is connected. the sewerage further Ru comprising a pump for press-fitting a sewage treatment apparatus according to any one of claims 7 請Motomeko 1.

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