JP2003144879A - Hair clogging elimination type sewage mixing apparatus and method for using the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a sewage mixing apparatus in which the clogging owing to the adhesion of hair can be eliminated and which has an excellent mixing effect. SOLUTION: The hair clogging elimination type sewage mixing apparatus has a smoothly throttling/compressing part 3, a flow velocity accelerating part 6, a turbulent flow breaking/pressure reducing part 8 formed in this order in the flow direction inside a unit mixing pipe 1 having serially connecting means 2 on both ends. The part 6 is constituted of a central flow passage 4 and a plurality of sub flow passages 5 which surround the passage 4 and each of which has an arcuate cylinder-like shape in the cross section. The part 8 has a planar edge 7 formed on the terminal of the part 6 in the radial direction and a cylindrical part which is connected to the edge 7 and has a prescribed length, and the diameter wider than that of a circumscribed circle of the passages 5. An injection port 9a of a gas injecting pipe 9 is arranged on the side of the edge 7 of the part 8.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to wastewater treatment by introducing wastewater into a wastewater treatment tank for treating industrial wastewater such as hotels and restaurants, domestic wastewater from households, and livestock wastewater such as cattle and pigs. In order to crush the sludge by mixing in order to enhance the treatment efficiency of the sludge component in the wastewater, and to supply a gas such as oxygen to the wastewater to accelerate the decomposition treatment of the sludge component, The present invention relates to a liquid mixing device for increasing a dissolved concentration, and more particularly to a device capable of eliminating adhesion of hair such as hair in the device and a method of using the device.

[0002]

2. Description of the Related Art In wastewater treatment by introducing wastewater into a wastewater treatment tank to treat domestic wastewater from hotels and restaurants and household wastewater, in order to increase the efficiency of sludge treatment in the wastewater. To crush the sludge by mixing with pressure vibration that repeats pressurization and depressurization, and to supply a gas such as oxygen to the wastewater to accelerate the decomposition treatment of the sludge and to increase the dissolved concentration of the gas. Various liquid mixing devices have been proposed.

A common problem with these devices is that
Body hair such as hair is entangled in the device and they are solidified and adhered together with oil and fat, resulting in a decrease in the mixing function of the above-mentioned sewage and a function of increasing the dissolved concentration of injecting gas, and further, a mass of the hair. May block the flow path and flatten the sewage treatment system itself, and the operation of the treatment system may have to be stopped.

In order to prevent this, it can be considered that, before such a mixing treatment, the sewage can be passed through a wire net or a filtration net to remove hairs that cause clogging. However, in reality, the solid sludge and hair are discharged together in the wastewater in a mixed state, and it is almost impossible to selectively remove only the hair from the solid sludge. , What to do with this measure has been one of the major challenges so far.

For example, a mixing pipe disclosed in Japanese Patent Laid-Open No. 6-226070 has been proposed as a mixing device which does not cause clogging of dirty water. In this device, the tongue pieces, which are opposed to each other and inclined from both sides of the inner wall surface of the mixing pipe, are provided so as to be displaced so as not to come into contact with each other at a central portion of the pipe. In such a device, due to its structure, depending on the direction of sewage flow, the middle of the bristles does not hang on the tongue itself, but it is located in the water flow collecting space on the back side (downstream) of the tongue. Hair and the like gather, and fats and oils adhere to them to form "hair balls." Then, this sticks to the back side of the tongue and the inner wall surface of the tube, and the hairs and fats and oils adhere to each other one after another to gradually become a large lump.

In order to remove this, it is possible to carry out backwashing with a very small amount attached, but if it becomes a large lump to a certain extent, removal by washing can hardly be expected and clogging occurs. Then the mixing function was paralyzed, and we had no choice but to replace the parts and disassemble and clean them.

[0007] Separately, as shown in Fig. 10, there is provided a processing device which divides a mixing pipe into a plurality of flow paths from the middle, and in this case, long hairs are hung over the flow distribution port. Becomes unavailable in a short time. For this reason, it is necessary to regularly perform the work of removing the hair, which is a very difficult situation.

Separately from this, an air diffuser in which a large number of protrusions are arranged in a cylinder is provided as one which does not cause clogging. However, even with this device, long hairs straddle a large number of protrusions, and the hairs become unusable in a short period of time, making it very difficult to remove the hairs.

Further, a water treatment device disclosed in Japanese Patent Laid-Open No. 5-68960 has been proposed. In this device, water is made to collide with a hard wall surface to mix, and in this device, long hairs hang over the shunt part of the collided water, and oil and fat are mixed with a bent part for guiding the water. There was a problem that lumps tended to adhere.

When these mixing devices are used, they are installed on the water surface of the sewage treatment tank so that the sewage in the sewage treatment tank can be introduced by a water absorption pipe and sent to the next treatment step by a drain pipe. There is. In such a method of use, the pressure for sucking the sewage on the surface of the water causes a large load on the pump, and the longer the length of the pipe to be delivered, the greater the fluid resistance from the inner surface of the pipe. Therefore, it is difficult to efficiently obtain the mixing flow rate.

[0011]

DISCLOSURE OF THE INVENTION The present invention has been made in view of the above circumstances, and in wastewater treatment performed by introducing wastewater into a wastewater treatment tank for treating industrial wastewater, domestic wastewater, livestock wastewater, etc. , The sludge is crushed by mixing to improve the treatment efficiency of the sludge component in the wastewater, and a gas such as oxygen is supplied to the wastewater to promote the decomposition treatment of the sludge component, and the gas is dissolved. In a liquid mixing device for increasing the concentration, it is possible to prevent hair from being caught in the device, mixing hair and oil and fat and sticking to the inner wall surface of the pipe, and effectively mixing sewage. It is intended to provide a method of use in which mixing efficiency can be improved by the device.

[0012]

In order to solve the above-mentioned problems, according to the present invention, the inside of a unit mixing pipe 1 provided with a series connecting means 2 at both ends is provided with a smooth throttle compression portion 3 in order from the flow direction. , A central flow path hole 4 and a plurality of sub-flow path holes 5 having a circular arc-shaped cross section and surrounding the central flow path hole 4, and a radial plane edge formed at an end of the rapid flow path portion 6. 7 and a radial edge 7 is provided continuously to form a turbulent pressure reducing portion 8 having a diameter larger than the circumscribed diameter of each of the sub-channels 5. Radial plane edge 7
This is a clogging-removal type sewage mixing apparatus which is provided with an inlet 9a of a gas inlet pipe 9 near the outlet.

Further, in the above-mentioned structure, the turbulent pressure reducing section 8 is a re-depressurizing section 10 having a wider diameter downstream from the middle portion in the length direction of the pipe, and the middle portion thereof in the flow direction. It is formed on the vertical step surface 11 which is vertical.

Further, in the above structure, a gas inflow control device 12 is provided in the gas injection pipe 9.

Furthermore, in the above-mentioned structure, the serial connection means 2 is fitted or screwed so that the injection ports 9a of the gas injection pipes 9 of the unit mixing pipes 1 can be connected in series by phasing in the circumferential angle direction. It is provided with a connecting portion 13.

Furthermore, in the above structure, the center line of the central flow path hole 4 and / or each of the sub flow path holes 5 is inclined.

Further, the above-mentioned clogging-removing type sewage mixing device is arranged below the surface of the water, and the mixing treatment sewage is directly fed into the water from the turbulent flow pressure reducing section 8 of the final unit mixing pipe 1 of the connected device without passing through the water discharge pipe 15. It is a method of using a clogging-removing type sewage mixing device, which is characterized in that it can be discharged.

[0018]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of a clogging-removing type sewage mixing apparatus according to the present invention will be described below based on the embodiments shown in the drawings.

The present invention relates to (a) and (b) of FIGS. 1 and 4.
As shown in FIG. 3, the inside of the unit mixing pipe 1 provided with the series connecting means 2 by the connecting portion 13 by fitting (shown in FIG. 4) or screwing (shown in FIG. 1) at both ends is squeezed and compressed in order from the flow direction. The part 3, the fast flow part 6, and the turbulent pressure reducing part 8 are formed. The throttle unit 3 has a funnel-like smooth aperture. The rapid flow section 6 following the throttle compression section 3 is shown in FIGS.
As shown in. A central flow path hole 4 is formed in the center, and the central flow path hole 4 is surrounded to integrally form a plurality of sub flow path holes 5 having a cylindrical peripheral surface in the flow direction with a substantially arcuate section.

The turbulent pressure reducing section 8 has a radial plane edge 7 which is perpendicular to the flow direction at the end of the fast flow section 6, and the radial plane edge 7 is followed by each of the sub-flow paths. The turbulent flow depressurization section 8 having an arbitrary length wider than the circumscribed diameter with respect to the whole 5 is formed. Then, the gas inlet pipe 9 is connected to the inner peripheral wall surface of the turbulent pressure reducing portion 8 near the radial plane edge 7 so as to face the inlet 9a.

As shown in FIG. 2, the turbulent pressure reducing section 8 is
It is also possible to form the re-decompression section 10 in which the diameter is further widened downstream from the middle portion in the length direction of the pipe, and the boundary of the middle portion can be formed on the vertical step surface 11 perpendicular to the flow direction.

Further, as shown in FIG. 3, the gas injection pipe 9 may be provided with a gas inflow control device 12 for controlling the mixing amount of gas such as oxygen into the waste water.

As shown in FIG. 3, the serial connection means 2 is fitted or screwed so that the injection ports 9a of the gas injection pipes 9 of the unit mixing pipes 1 can be serially connected by phasing the inlet 9a in the circumferential angle direction. It can be configured to include the connecting portion 13.

Further, the central flow path hole 4 and each sub flow path hole 5
It can be formed by inclining at least one of the center lines. The unit mixing pipe 1 of the present invention can be formed by cutting metal or reinforced plastic or pouring reinforced plastic into a mold.

As shown in FIG. 7, the method for using the above-described clogging-removing type sewage mixing apparatus is usually used on the surface of the water, and water is absorbed from the water supply pipe 14 via a pump and mixed in the apparatus. The treated wastewater is sent out to the next treatment process through the water discharge pipe 15.

Apart from this method, as shown in FIG. 8 (method in which the pump is placed on the water) and FIG. 9 (method in which the pump is also placed in the water), a clogging-removing type sewage mixing device is arranged below the water surface. Method is possible. Then, the mixing-treated wastewater can be discharged directly into the water from the turbulent flow depressurization unit 8 of the final unit mixing pipe 1 of the device without passing through the water discharge pipe 15. By doing so, the running water resistance due to the water discharge pipe 15 is completely eliminated, and the water supply pipe 14 can be shortened by the method of placing the pump in FIG. 9 in water, so that the resistance can be minimized. Therefore, the effect can be sufficiently obtained by connecting a few unit mixing pipes 1 or by only one, as shown in FIGS. 8 and 9.

[0027]

EXAMPLE An example of the unit mixing pipe 1 of the present invention will be described below. The unit mixing pipe 1 has an outer diameter of 60 mm and a length of 90 as shown in (a) and (b) of FIG.
A mm compression hard vinyl chloride rod is cut to form a squeezing compression unit 3, a fast flow unit 6, and a turbulent flow decompression unit 8. At both ends, a series connecting means 2 for mating with males and females is formed, and from one of the ends, first, a throttle compression portion 3 is formed. The diaphragm compressing section 3 has an inner diameter of 50 mm at the opening end, and gradually reduces the diameter for a length of 40 mm from the inner diameter to 25 mm to form a funnel-shaped smooth diaphragm.

Then, a hole having an inner diameter of 25 mm and a length of 10 mm is formed in the central portion following the throttle compression portion 3 to form a central flow passage hole 4. Further, a hole having an inner diameter of 50 mm is opened from the other end portion until reaching the central flow path hole 4, and the turbulent pressure reducing portion 8 is formed.
To form.

Around the central flow passage hole 4, four round cross-sections opened in the central flow passage hole 4 at equal intervals in the circumferential direction have an inner diameter of 10 mm.
The sub-flow passage hole 5 on the cylindrical surface of the superior arc-shaped flow direction is opened to form the rapid flow portion 6. A radial plane edge 7 perpendicular to the flow direction is formed at the end of the rapid flow portion 6 so as to continue to the turbulent pressure reducing portion 8. The gas injection pipe 9 having an inner diameter of 3 mm is connected to the inner peripheral wall surface of the turbulent pressure reducing portion 8 near the radial plane edge 7 so as to face the injection port 9 a having a diameter of 3 mm. Then, as shown in FIG. 3, a plurality of the unit mixing pipes 1 are prepared, and both ends of the unit mixing pipes 1 are fitted to each other and serially connected in one direction for use.

[0030]

Since the present invention has the above-described structure, as shown in FIG.
The unit mixing pipes 1 are connected by the series connecting means 2 so that the sewage for sewage to be pumped into the pipes can be mixed. As shown in FIG. 1, even if the unit mixing pipes 1 are connected to each other, there is no bending part in the middle of the bristles in the flow direction in any part of the pipe, and the liquid generated in the turbulent pressure reducing part 8 is The turbulent flow causes the hair to flow in any part of the pipe without stopping, and the hair does not adhere to any part.

When sewage is pumped into the pipe 1, first, sewage containing sludge and gas is compressed and accelerated so as to be squeezed by the smooth squeezing and compressing section 3. Then, it passes at high speed while being compressed to the rapid flow section 6 consisting of the central flow path hole 4 following the throttle compression section 3 and a plurality of sub flow path holes 5 surrounding it. Then, when the rapid flow portion 6 flows into the turbulent flow depressurization portion 8, the end of the rapid flow portion 6 is the radial plane edge 7, so that the pressure is suddenly reduced and decelerated.

At this time, as shown in FIG. 1, a high-speed flow A blown out from the end of the rapid flow part 6 is generated in the central part of the turbulent flow depressurization part 8 following the central flow path hole 4, and there are a plurality of sub-flows around it. A high-speed flow B is also generated from the flow path hole 5. At this time, the flow of the central flow path hole 4 and the flow of the sub flow path hole 5 interfere with each other to generate a swirling motion. Then, in front of the radial plane edge 7, a turbulent flow C is generated in a depressurized state so as to surround these fast flows.

At this time, the high-pressure part and the low-pressure part of the sewage in the turbulent flow depressurization part 8 are in a complicated turbulent flow state due to friction between fast flows / backflow collision, fast flow / slow flow friction / backflow collision, and the like. Then, the water, solid matter, and gas contained in the sewage are mixed. Further, since the unit mixing pipes 1 are connected by the series connecting means 2, the mixing of the above respective parts is repeated.

The rapid flow portion 6 is formed in the central flow passage hole 4 and the plurality of sub flow passage holes 5 in order to enhance the mixing effect in the turbulent flow depressurization portion 8 and to eliminate hair retention places.

Further, the turbulent pressure reducing section 8 has a re-depressurizing section 1 in which the downstream side from the middle portion in the length direction of the pipe is further widened.
In the form set to 0, the pressure is reduced again and further mixed.

Further, inclining the center lines of the central flow path hole 4 and the sub flow path holes 5 also disturbs the fast flow of the central flow path hole 4 and the sub flow path holes 5 in the same manner as described above. Flows and turbulent flows or even more turbulence can cause more violent collisions and friction. This collision can change the swirling direction of the dirty water flowing at high speed from each flow path to the turbulent pressure reducing section 8 depending on the inclination direction of the central flow path hole 4 and each sub flow path hole 5. By setting this direction so as to alternately turn in the opposite direction for each connection, it is possible to cause more intense collision and friction, and to further enhance the mixing effect.

The turbulent flow depressurization unit 8 faces the injection port 9a of the gas injection pipe 9, but since this part is in a depressurized state, the gas is turbulent depressurization unit 8 without pressurization. It is sucked inside. Therefore, in the present invention, the gas can be mixed into the wastewater without providing the gas injection compressor.

The mixing of the gas makes it possible to make the dissolution rate in water extremely large due to the synergistic effect of micronization of bubbles by mixing and repetition of pressurization and depressurization.
Further, in the mode in which the gas inflow control device 12 equipped with the gas injection compressor is provided in the gas injection pipe 9, it is possible to forcibly adjust the mixing amount of the gas in the wastewater by the control of the gas inflow control device 12. Become.

Further, the serial connecting means 2 is provided with a connecting portion 13 by fitting or screwing so that the inlets 9a of the gas injecting pipes 9 of the unit mixing pipes 1 can be connected in series by phasing in the circumferential angle direction. When included, the mixing effect of the injected gas can be enhanced and the dissolution rate in water can be increased.

By injecting gas from the inlet 9a of the gas injection pipe 9 into the turbulent depressurization unit 8, there is the action of temporarily pushing the hair that has entered the depressurization unit 8 downstream. It is possible to prevent hair from adhering to the vertical flat surface 7 and the inner wall surface of the turbulent pressure reducing portion 8.

Further, even if the unit mixing pipes 1 are connected, the central flow path hole 4 is blocked at the center of the pipes (when the interior is viewed in the longitudinal direction, it projects from both sides to provide a visual field of the central part). Since there is no (obstructing portion) and it continuously escapes, the mixed wastewater can be strongly ejected from the connecting end of the unit mixing pipe 1.

[0042]

EFFECTS OF THE INVENTION The present invention is as described above. By using the liquid mixing apparatus of the present invention for the treatment of sewage by introducing the sewage into various sewage treatment tanks, hair such as hair adheres to the inside of the mixing apparatus. In addition to being able to completely eliminate this problem, the wastewater can be efficiently mixed to crush the sludge, and a gas such as oxygen can be mixed in the wastewater to an extremely high concentration. It has become possible to greatly accelerate the target decomposition process.

Further, the structure of the device of the present invention has the advantage that it is sturdy and easy to manufacture because the inside of the pipe has a simple shape with no protrusions even if the wall thickness changes. At the same time, it is a shape that does not easily block foreign matter other than hair, and almost no failure occurs, which means that management is free from operations such as operation stoppage due to clogging, replacement of parts, cleaning of parts, and true maintenance. The realization of free is also a major feature.

Further, in mixing gas such as oxygen into sewage, decompression suction is performed in the mixing process without an air compressor, which has the advantages of downsizing the entire apparatus and reducing power consumption for operating the air compressor.

Furthermore, since the central flow path hole 4 is continuously open without obstruction at the center of each unit mixing pipe 1 connected, a powerful jet of water flow is obtained in a certain direction, and a dirty device is obtained. The inside can be easily backwashed. And since the flow in the apparatus is extremely smooth, the processing capacity is, for example, currently excellent in performance.
When compared to a turbulent mixing pipe such as No. 226070, the device can be made compact to 1/6 or less in volume ratio in order to obtain the same processing capacity.

Further, in the method of arranging the clogging elimination type sewage mixing device under the surface of the water, the mixing treatment is directly performed in the water from the turbulent flow pressure reducing section 8 of the unit mixing pipe 1 at the final connection of the device without passing through the water discharge pipe 15. Since the sewage can be discharged, the water flow resistance due to the water discharge pipe 15 is completely eliminated. Further, in the method of placing the pump in water, including the pump, the water pipe 14 can be shortened so that the resistance can be minimized and the pressure for sucking the sewage above the water surface is not required. Is reduced to.

Therefore, as compared with the method provided on the water surface, a smaller pump having a smaller capacity than that of the pump can be used to obtain the same processing capacity, and the pump having the same capacity can be used. Then, the processing flow rate can be significantly increased.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view showing a state where unit mixing pipes are connected.

FIG. 2 is a vertical perspective view showing another form of a unit mixing pipe.

FIG. 3 is a vertical sectional side view showing a state where unit mixing pipes are connected.

FIG. 4 is a vertical perspective view of (a) of the unit mixing pipe,
(B) is a vertical side view.

FIG. 5 is a side view of the unit mixing pipe as viewed from the length direction.

FIG. 6 is a side view of a unit cutting pipe in a fast-flowing section.

FIG. 7 is a vertical cross-sectional side view showing a state in which unit mixing pipes are arranged on the water surface.

FIG. 8 is a vertical sectional side view showing a state in which the unit mixing pipes are arranged below the water surface.

FIG. 9 is a vertical sectional side view showing a state in which a unit mixing pipe and a pump are arranged below the water surface.

FIG. 10 is a perspective view showing a state in which a part of a conventional mixing pipe is cut away.

[Explanation of symbols]

1 unit mixing pipe 2 Series connection means 3 Aperture compression unit 4 Central channel hole 5 Sub-channel hole 6 Rapid flow section 7 Radial plane edge 8 Turbulent decompression section 9 Gas injection tube 9a Inlet port of gas injection tube 10 Re-decompression section 11 Vertical step surface 12 Gas inflow control device 13 Connection 14 water pipe 15 Water discharge pipe

Claims (6)

[Claims] 1. A unit mixing pipe (1) having series connecting means (2) at both ends thereof, in order from the flow direction,
A fast flow section (6) formed from a smooth throttle compression section (3), a central flow path hole (4) and a plurality of sub-flow path holes (5) surrounding the central flow path hole and having an arcuate cross section having a substantially arcuate shape; A radial plane edge (7) is formed at the end of the fast flow section (6), and a length is provided following the radial plane edge (7) to circumscribe the sub-flow passages (5). Is formed in a turbulent pressure reducing portion (8) having a diameter larger than the diameter, and the inlet (9a) of the gas injection pipe (9) is formed near the radial plane edge (7) of the turbulent pressure reducing portion (8).
A clogging-free sewage mixing device. 2. The re-decompression section (1) wherein the turbulent flow decompression section (8) has a wider diameter downstream from an intermediate section in the length direction of the pipe.
The anti-clogging type wastewater mixing device according to claim 1, wherein the intermediate portion is formed as a vertical step surface (11) that is perpendicular to the flow direction. 3. The anti-clogging type wastewater mixing device according to claim 1, wherein the gas injection pipe (9) is provided with a gas inflow control device (12). 4. The serial connection means (2) is fitted or screwed so that the injection port (9a) of the gas injection pipe (9) of each unit mixing pipe (1) is phase-aligned in the circumferential angle direction and can be connected in series. 4. A connecting part (13) by means of wear, comprising:
The clogging elimination type sewage mixing apparatus according to any one of the above. 5. The anti-clogging type wastewater according to any one of claims 1 to 4, wherein the central flow path hole (4) and / or each sub-flow path hole (5) is inclined with respect to a center line. Mixing equipment. 6. An anti-clogging type sewage mixing device is arranged under the surface of the water, and is directly submerged from a turbulent flow depressurizing section (8) of a final unit mixing pipe (1) of the device without passing through a water discharge pipe (15). 6. The method for using the anti-clogging type wastewater mixing apparatus according to any one of claims 1 to 5, wherein the mixing treatment wastewater is discharged.