JP3128828U - Sewage treatment equipment - Google Patents

Abstract

[PROBLEMS] To ensure a sufficient amount of oxygen to be taken into water even when the amount of air supplied to a water flow is reduced due to the deep depth of a flow control tank of a sewage treatment facility.
The submersible pump includes an underwater pump, an inflow pipe having an inlet, an outlet, and a connecting portion, an intake pipe having upper and lower ends opened, and a magnetizing tool. The magnetization processing tool 5 has a tubular body 6 having a flat cross-sectional shape, and a permanent magnet is externally attached so that different magnetic poles face opposite wall surfaces on the side where the passage width of the tubular body 6 is small. The submersible pump 2 is installed on the bottom surface of the flow rate adjustment tank of the sewage treatment facility, and the outlet pipe 3 has the outlet 31 located in the flow adjustment tank and the inlet 30 is connected to the discharge port 21 of the submersible pump 2. To do. The intake pipe 4 has an upper end opening located on the water surface and a lower end opening connected to the connecting portion 32 of the water flow pipe 3. The magnetization processing tool 5 is arranged downstream of the position where the intake pipe 4 of the flowing water pipe 3 communicates with the tubular body 6 in the middle of the flowing water pipe 3.
[Selection] Figure 1

Description

  This device is, for example, a sewage treatment apparatus installed in a flow adjustment tank that introduces and collects wastewater from general households and wastewater from facilities such as restaurants and hospitals (hereinafter referred to as “sewage”) in sewage treatment facilities. In particular, the present invention relates to a sewage treatment apparatus used for aeration while stirring water in a flow rate adjusting tank.

  In a general sewage treatment facility, as shown in FIG. 5, a flow rate adjusting tank 10 is provided for introducing and temporarily storing sewage after large trash or sand is removed. The sewage stored in the flow rate adjusting tank 10 is sucked up by the pump 11 and sent to the aeration tank 12 at a constant flow rate. A blower 13 for introducing air into the sewage in the tank is connected to the aeration tank 12. Aerobic microorganisms inhabit sewage, and oxygen is supplied to the microorganisms by introducing air to purify the water quality. The water after the aeration treatment is sent from the aeration tank 12 to the precipitation tank 14. In the settling tank 14, mud is precipitated, and the supernatant liquid is sent to the discharge tank 15 as treated water. The mud precipitated in the settling tank 14 is sucked out by the pump 16 and becomes a dehydrated cake through concentration and dehydration of the mud. In the discharge tank 15, the treated water is sterilized using sodium hypochlorite or the like and then discharged to a river or the like.

Since the aeration process in the aeration tank 12 is not always sufficient, as shown in FIG. 6, a sewage treatment apparatus 100 is installed inside the flow rate adjustment tank 10 to perform an auxiliary aeration process.
The sewage treatment apparatus 100 is installed in the flow adjustment tank 10 in a submerged state, and performs aeration while stirring the sewage collected in the flow adjustment tank 10. The illustrated sewage treatment apparatus 100 includes a submersible pump 2 that draws in and discharges sewage in the flow rate adjusting tank 10, and a water pipe that has one end connected to the discharge port of the submersible pump 2 and the other end opened in the flow rate adjusting tank 10. 3 and an intake pipe 4 whose lower end opening communicates with the flow path in the water pipe 3 and whose upper end opening is located on the water surface. As a result of the negative pressure generated in the intake pipe 4 by the water flow in the flowing water pipe 3, the intake pipe 4 draws outside air and introduces air into the flowing water pipe 3. This phenomenon of air introduction is generally called “ejector action”. The air introduced into the water flowing through the water flow pipe 3 by this ejector action is mixed as bubbles, and this gas-liquid mixed flow is injected into the flow rate adjusting tank 10 to perform stirring and aeration.

  However, in the sewage treatment apparatus having the above-described configuration, when the capacity of the flow rate adjusting tank 10 is large and the water depth is deep, the amount of air introduced into the water flow in the water flow pipe 3 is smaller than the intake pipe 4 and the water flow is reduced. The size of the bubbles to be mixed also increases. As a result, the contact area between water and air is reduced, and the amount of oxygen taken into water is reduced. Therefore, the purification function by aeration is not sufficiently exhibited, and the aeration process in the aeration tank cannot be supplemented.

  This device was made by paying attention to the above-mentioned problems. By deepening the water depth of the flow control tank, sufficient intake of oxygen into the water is ensured even when the amount of air introduced into the water flow is reduced. An object of the present invention is to provide a sewage treatment apparatus that can be used.

  The sewage treatment apparatus according to this device is provided in a flow rate adjusting tank for sending sewage at a constant flow rate to an aeration tank of a sewage treatment facility, and includes a submersible pump having a suction port and a discharge port, an inlet at one end, and the like. An outlet at the end, and a water pipe provided with a connecting portion at a position close to the inlet, an intake pipe having an upper end and a lower end, and a tubular body having a flat cross-sectional shape with both ends opened. And a magnetizing tool in which a plurality of permanent magnets are externally attached so that different magnetic poles face opposite wall surfaces on the side where the passage width is small. The submersible pump and the water pipe are installed in a submerged state on the bottom surface of the flow rate adjusting tank, the water pipe has an outlet located in the flow rate adjusting tank and the inlet is connected to the outlet of the submersible pump, The intake pipe has an opening at the upper end located on the water surface and has a lower end opening connected to a connecting portion of the flowing water pipe so as to communicate with a flow path in the flowing water pipe. The magnetizing treatment tool is arranged downstream of the position where the intake pipe of the water pipe communicates with the tubular body in the middle of the water pipe, and the water flowing in the water pipe and the water flow in the water pipe A magnetic field generated by the magnetization processing tool is caused to act on the air introduced into the flowing water pipe by the intake pipe that has been made negative by the above.

When the sewage treatment apparatus having the above configuration is installed in the flow rate adjusting tank and the submersible pump is driven, the sewage in the flow rate adjusting tank sucked by the submersible pump is sent from the discharge port to the inlet of the water pipe. The sewage sent to the water pipe flows through the flow path in the water pipe and flows out from the outlet into the flow rate adjusting tank. In the middle of this flow path, air is introduced from the intake pipe to the water flow pipe and mixed into the water flow as bubbles, so that a gas-liquid mixed flow is jetted from the outlet of the water flow pipe. The tank is stirred and aerated.
The sewage flowing through the water pipe is magnetized by the magnetizing tool. Further, since the magnetization processing tool is disposed downstream of the communication position with the intake pipe, the magnetic field also acts on the bubbles. When water is magnetized by the action of a magnetic field, the water clusters are subdivided, so that the action of water depriving oxygen from the surroundings (reduction action) is enhanced, and the amount of oxygen taken into water is increased. For this reason, even if the capacity | capacitance of a flow control tank is large and the water depth is deep, the purification function by aeration is fully exhibited. Furthermore, when the bubbles are subjected to the action of a magnetic field, the fragmentation of the bubbles is also promoted, the contact area between water and air is increased, the amount of oxygen taken into water is increased, and the purification function by aeration is further promoted.

  Further, the magnetization processing tool includes a tubular body having a flat cross-sectional shape, and a plurality of permanent magnets externally attached so that different magnetic poles face opposite wall surfaces on the side where the passage width of the tubular body is small. In addition, since the tubular body is interposed in the middle of the flowing water pipe, a strong magnetic field can be applied to the water flowing through the tubular body, and the effect of the magnetization process is enhanced.

  According to this device, water clusters and bubbles are subdivided, so even if the amount of air supplied to the water flow is small, sufficient amount of oxygen can be secured in the water, and the flow rate is large and the water depth is deep. The adjustment tank can also fully perform the purification function by aeration.

FIG. 1 shows a configuration of a sewage treatment apparatus 1 according to an embodiment of the present invention.
The illustrated sewage treatment apparatus 1 is installed in a submerged state in a flow rate adjusting tank in a sewage treatment facility, and is supported on a substrate 9 installed on a bottom surface f. The flow rate adjusting tank is for temporarily storing sewage to be sent to the aeration tank and sending it to the aeration tank at a constant flow rate.

  The sewage treatment apparatus 1 includes a submersible pump 2, a flowing water pipe 3, an intake pipe 4, and a magnetization treatment tool 5. The submersible pump 2 sucks water in the tank from the suction port 20 and discharges it from the discharge port 21. The outlet pipe 3 has an inlet 30 at one end and an outlet 31 at the other end, the inlet 30 at one end is connected to the outlet 21 of the submersible pump 2, and the outlet 31 at the other end is located in the tank. Let

  An upward connecting portion 32 is formed in the water pipe 3 at a position close to the inlet 30. An opening at the lower end of the intake pipe 4 is connected to the connecting portion 32, and the intake pipe 4 is communicated with the flow path of the flowing water pipe 3. The intake pipe 4 is formed in such a length that its upper end can protrude from the water surface. Since the opening at the lower end of the intake pipe 4 faces the flow path in the flowing water pipe 3 through the connecting portion 32 and the opening 41 at the outer periphery of the upper end is located on the water surface w, the water flow in the flowing water pipe 3 As a result, the pressure in the intake pipe 4 is reduced to a negative pressure, and air is introduced from the intake pipe 4 into the flowing water pipe 3.

  In this embodiment, the magnetization processing tool 5 is disposed downstream of the position where the intake pipe 4 communicates with the flowing water pipe 3. The tubular body 6 constituting the magnetization processing tool 5 is interposed in the middle of the flowing water pipe 3. For this reason, the water flow pipe 3 is separated into an upstream pipe 3A and a downstream pipe 3B. An inlet 60 of the tubular body 6 is provided at the outlet 33 of the upstream pipe 3A, and an outlet 61 of the tubular body 6 is provided at the inlet 34 of the downstream pipe 3B. , Respectively.

  As shown in FIGS. 3 and 4, the magnetization processing tool 5 includes a tubular body 6 having an inlet 60 at one end and an outlet 61 at the other end, and a plurality of magnetic field generation externally attached to the tubular body 6. And a container 7. The tubular body 6 is a magnetized region at the center of the length, and is formed in a flat cross-sectional rectangular shape in which the longitudinal passage width y of the passage 63 is sufficiently larger than the lateral passage width x. The side wall surfaces 62R and 62L of the tubular body 6 are opposed to each other with a narrow passage width x, and a plurality of magnetic field generators 7 are attached to the opposed side wall surfaces 62R and 62L.

  Each magnetic field generator 7 has a plurality of permanent magnets 71 loaded in a laminated state with the magnetic poles aligned in the case body 70, and each magnetic field generator 7 has different magnetic poles N and S facing each other. Are fixedly attached to the outer peripheral surface of the tubular body 6.

  Although the magnetization processing tool 5 of this embodiment is disposed downstream of the position where the intake pipe 4 communicates with the flowing water pipe 3, the magnetization processing tool 5 is connected to the flowing water pipe 3 and the intake pipe 4 as shown in FIG. You may arrange | position upstream of the position which communicates. The embodiment of FIG. 1 is preferably applied when the water depth is relatively shallow, and the embodiment of FIG. 2 is preferably applied when the water depth is relatively deep.

  When the sewage treatment apparatus 1 having the above-described configuration is installed in the flow rate adjusting tank and the submersible pump 2 is driven, the sewage in the tank sucked from the suction port 20 of the submersible pump 2 flows from the discharge port 21 of the submersible pump 2 to the flowing water pipe. 3 inflow port 30. The sewage sent to the water flow pipe 3 flows through the flow path in the flow water pipe 3 and flows out from the outlet 31 into the tank, but air introduced into the flow water pipe 3 from the intake pipe 4 in the middle of the flow path is a bubble. Become mixed into the water stream. As a result, it is injected as a gas-liquid mixed flow from the outlet 31 into the tank, whereby stirring and aeration are performed.

  The sewage flowing through the water pipe 3 is magnetized by the magnetizing tool 5. In the embodiment of FIG. 1, a magnetic field directly acts on water and bubbles, whereas in the embodiment of FIG. 2, a magnetic field directly acts only on water. When water is magnetized under the action of a magnetic field, the water clusters are subdivided, so the action of water depriving oxygen from the surroundings (reduction action) increases and the amount of oxygen taken up increases, Even if the capacity is large and the water depth is deep, the purification function by aeration is sufficiently exerted. Further, when the bubbles are subjected to the action of a magnetic field, the fragmentation of the bubbles is also promoted, the contact area between water and air is increased, the amount of oxygen taken into water is increased, and the purification function by aeration is further promoted.

It is a side view of the sewage treatment apparatus which is one Example of this device. It is a side view of another Example. It is a side view of a magnetization processing tool. It is sectional drawing which follows the AA line of FIG. It is explanatory drawing which shows the structure of a sewage treatment facility. It is explanatory drawing which shows the state which installed the conventional sewage treatment apparatus in the flow control tank.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Sewage treatment apparatus 2 Submersible pump 3 Flowing water pipe 4 Intake pipe 5 Magnetization processing tool 6 Tubular body 10 Flow rate adjustment tank 20 Inlet 21 Outlet 30 Outlet 31 Outlet 32 Connecting part 71 Permanent magnet

Claims (1)

A sewage treatment apparatus provided in a flow rate adjusting tank for sending sewage at a constant flow rate to an aeration tank of a sewage treatment facility,
A submersible pump having a suction port and a discharge port; an inflow port at one end; an outflow port at the other end; an inflow pipe having a connecting portion at a position close to the inflow port; an intake pipe having upper and lower ends opened; And a magnetizing tool comprising a plurality of permanent magnets externally attached so that different magnetic poles face opposite wall surfaces of the tubular body having a small passage width. ,
The submersible pump and the water pipe are installed in a submerged state on the bottom surface of the flow rate adjusting tank, the water pipe has an outlet located in the flow rate adjusting tank and the inlet is connected to the outlet of the submersible pump, The intake pipe has an opening at the upper end located on the water surface and has an opening at the lower end connected to the connecting portion of the water flow pipe so as to communicate with a flow path in the water flow pipe.
The magnetization processing tool is disposed downstream of the position where the intake pipe of the water pipe communicates with the tubular body in the middle of the water pipe, and the water flowing in the water pipe and the water flow in the water pipe A sewage treatment apparatus that causes a magnetic field generated by the magnetization treatment tool to act on the air introduced into the flow water pipe by the intake pipe that has been made negative by the pressure.

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