JP2012041806A - Power recovery hydroelectric system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a power recovery hydroelectric system capable of improving power generation efficiency in a sewerage facility by directly introducing sewage water pumped from a manhole pump of a manhole pump station into a generator at a place of discharge.SOLUTION: The present invention improves power generation efficiency by directly introducing hydraulic pressure of sewage water into a hydraulic turbine 23 when sewage water pumped from a manhole pump of a manhole pump station at an upstream side is discharged through a force feed pipe outlet 8. Upper drawings illustrate one state where a whole system is installed in one manhole. Lower drawings illustrate other state where a generator is separately installed in a new manhole additionally provided beside an existing manhole in the case that one manhole cannot install the whole system. In the other state, a narrow slit screen 20, a screen residue breaker 21, and the hydraulic turbine 23 are installed in the existing manhole and the generator 16 is installed in the new manhole. Rotational power of the wind mill type hydraulic turbine 23 is transferred to the hydraulic generator 16 through a generator drive axis 15 and the hydraulic generator 16 generates power.

Description

Currently, in the sewerage facilities, the sewage pumped by the manhole pump from the upstream manhole pumping station arrives at the downstream manhole of the pumping destination and is discharged even though there is a considerable amount of remaining water pressure.
It is made as it is.
The present invention is an electric power recovery hydroelectric power generation system in which the discharged water is directly guided to a water turbine, and hydroelectric power generation is performed using the discharged water pressure to recover electric power.

As sewage in sewer facilities, human waste from flush toilets, domestic wastewater generated by cooking, bathing and washing at home, shops, hotels,
There is industrial wastewater from the business establishments from the town factory to the large factory.

These sewage are buried in the sewage pipes and are basically sent by a natural flow method.

Manholes are installed at points that change the direction of flow, merge points, and branch points.

If all the sewage is sent under natural flow, the cost of sewage treatment can be reduced. However, as shown in Fig. 1, in fact, the collected sewage is pumped at a reverse slope, at a junction or over a river, etc. You cannot send water without help.
Therefore, there are many manhole pump stations where two sewage pumps are installed in the manhole.

Sewage is sent to the treatment plant through several manholes and manhole pumping stations. Therefore, the amount of sewage is small at first, but eventually it is huge.
A large amount of sewage collects at the treatment plant.

At first, the amount of sewage is small, so the pump has a small capacity. However, as it approaches the relay pumping station and the treatment plant, the amount of sewage increases and the capacity of the pump increases.

The electric energy is used comprehensively, and pumping and discharging are repeated. An effective method of changing the hydroelectric energy of a large amount of sewage sewage to electrical energy has not been put into practical use yet, and it is simply wasted into the river as sewage treatment water.

Patent No. 4132867 is a power generation system using sewage.
In this case, the existing sewage main pipe is buried underground with a gradient of around 2%. In order to increase the flow rate of sewage flowing through the sewage pipe, the buried pipe is dug up to increase the gradient (for example, 5 %) How to change laying
It is stated as a basic philosophy.
The introduction in the state that already lives and uses sewage started civil engineering work, large-scale renovation work, the equipment cost increased, and as a local government,
Today, local finances are severe, and it is thought that judgments are subtle in terms of both the cost effectiveness of equipment and measures for local residents.

Similarly, regarding the power generation system 100 of Patent No. 4132867, the treatment of filth in sewage is entrusted to the blade-shaped rectifier plate, but the treatment of various items in the sewage is just a matter that the filth hits the blade. We think that processing of is not too dangerous. If filth is not separated or crushed in some way, it is thought that the function of the equipment will stop in the future due to clogging of the current plate or entanglement with the water turbine.

Similarly, with regard to the power generation system 200 of Patent No. 4132867, the existing manholes are abolished and removed, but all the manholes that are installed are necessary, necessary places, bent places and merges Most things are installed at the point, and I think that removal is difficult.

Similarly, because the power generation system 300 of Patent No. 4132867 is also installed on a steep slope, civil engineering work costs will increase, and there will be a problem with the cost effectiveness of the equipment.

JP 2007-211433 published as a power generation system using sewage
There is. In this case, it is written as trash.
Since it is 99% of filth, the pendulum cleaner 11 will soon become full of filth and will not work, and it is thought that it will break down.

Patent 4132867 JP 2007-211433 published

Among the existing facilities, inventing efficient hydroelectric power generation facilities that can reduce the overall equipment construction costs and use sewage to recover power,
Problem 1.

The problem 2 is how to obtain sewage with a high flow velocity that cannot rotate the water turbine unless the sewage flow velocity is high.

The sewage in the sewage system, unlike conditioned water, contains a large amount of filth.
If the sewage mixed with filth is applied to the turbine, the turbine will stop moving immediately. Separating filth by the time it arrives at the water turbine,
Problem 3 is how to guide the water wheel.

        Problem 4 is how to effectively use the generated electricity.

Calculating the flow rate of sewage discharged from the outlet of the pressure pipe in the manhole, if the manhole pump at the manhole pumping station is 22 kW, the capacity of the 22 kW pump is Q: 5 (m3 / min) according to the pump performance curve. Converting minutes (min) to seconds (S)
Q: 5/60 (m3 / S)
H: 12m Diameter of pumping pipe diameter 100mm

Q: Flow rate (m3 / min) H: Lifting m
The diameter of the pressure feed pipe (discharge pipe) is 100mm and the cross-sectional area is πr2.
S = πr2 = 0.05 × 0.05 × 3.14 = 0.00785 m 2
The flow velocity is Q / S = 5/60 ÷ 0.00785 = 10.61 m / S, and 10.61 m / S of effluent water is obtained at the outlet.

In the case of Patent No. 4132867, in order to rotate the turbine of the generator, a large-scale sewage mains change work was necessary to increase the flow rate of sewage under natural flow to, for example, 5 m / s or more. If we catch the discharge water pressure,
It is possible to obtain a sufficient flow rate and flow velocity of 10.61 m / S in the case of the 22 KW pump in the previous calculation example without a large-scale remodeling work.

The slit machine according to claim 1 is a device that separates what passes filth in discharged water from what does not pass, and has several gaps, and an end on the outlet side between the outlet and the water turbine. Installed to face to the discharge direction,
It is installed in a state where the angle can be changed back and forth.
The inner waterway and the outer waterway are ducts through which sewage passes, and are arranged vertically in series, with the upper part being an inlet and the lower part being an outlet, and changing the direction of sewage flow by 90 degrees.
After the sewage discharged in the horizontal direction from the discharge port hits the slit machine, it is guided to the inner and outer conduits, and changes its direction by 90 degrees and falls directly below. When the discharged sewage hits the slit machine installed after the release, the filth etc. larger than the gap of the slit machine cannot pass through, so it is led down directly by the inner waterway and falls.
The sewage that is smaller than the slit machine gap and has passed through the slit machine is led to the outer conduit,
It falls directly below, turns the water turbine for the generator, and transmits the generated rotational power to the generator through the drive shaft. After the sewage led to the outer waterway passes through the water wheel,
It passes through the outer conduit, is led to the inner conduit, and is combined with the sewage and filth flowing through the inner conduit and drained from the lower portion of the inner conduit.

When the slit machine is raised vertically and the slit machine cover is put on, the sewage cannot pass through the slit machine, falls straight down, and is all guided to the inside of the inner conduit.
When the slitting machine is tilted horizontally and the slitting machine cover is put on, the sewage can no longer pass through the slitting machine and is all guided to the inside of the outer conduit.
This device can be used during generator maintenance.

The screen residue crusher according to claim 2 is diagonally above the slitting machine and opposite to the outlet.
When the blade of the residue crusher opens during rotation, it is attached at a distance that reaches the slit machine,
The screen crusher has a screen crusher drive shaft and a screen crusher motor. The screen crusher motor uses electricity generated by the generator, and the power of the screen crusher motor is used to drive the screen crusher. It is transmitted to the crusher by the drive shaft.
When the crusher is stopped, the blade of the crusher is folded small, while rotating,
It is opened by centrifugal force and passes through the gap of the slitting machine, and the deposit on the slitting machine is dropped directly below, thereby eliminating the adhesion of the dirt to the slitting machine and at the same time passing the slitting machine. Crush.

A hydroelectric generator according to a third aspect is a hydroelectric generator with a slit machine in which a slit machine, a water wheel, a drive shaft and a generator are integrated. The inner and outer conduits are necessary and used together.

A hydroelectric generator according to claim 4 is a residue crusher, a residue crusher drive motor,
It is a hydroelectric generator with a residue crusher that integrates a water wheel, a drive shaft and a generator.
The slit machine, inner waterway and outer waterway are necessary and used together.

The new manhole according to claim 5 is newly installed.
An existing manhole installs generators and other related equipment.
If it is judged that it is too narrow or disturbs maintenance, a new manhole will be newly established. A generator and other related equipment will be installed in the new manhole. A new manhole will be installed adjacent to the existing manhole. The new manhole will have a waterproof structure because it will interfere with the system if water enters, and it will be equipped with a flood alarm sensor and drain pipe inside.
The drain pipe is routed from the new manhole to the existing manhole.
Inclination so that the existing manhole side is lowered, and when a pipe enters the existing manhole, a check valve is attached to the pipe in a direction to close the inflow from the existing manhole. To prevent.

Regarding the effective use of the generated electricity according to claim 6, energy is saved by transmitting the generated electricity to the manhole pump control panel at the upstream manhole pump station and using it in the manhole pump control panel. .
For that purpose, there is an aerial space between the manhole pump control panel in the upstream manhole pumping station and the generator control panel that takes in the electricity generated by the generator,
Or, laying electric wires, laying the electric power generated by the generator into the generator control panel, using the installed electric wires to transmit to the manhole pump control panel, in the pressure source manhole pump control panel, Used as a power source, surplus power is grid-connected and sold to a power company.

At the time of discharge, the discharge water at the discharge port of the manhole pump is
The water pressure given by the manhole pump is still sufficient,
If this discharged water is efficiently guided to the generator turbine, sufficient flow rate and flow velocity can be obtained without large-scale remodeling work. .

The slitting machine separates as much sewage as possible in the discharged water, introduces sewage with little sewage, and introduces it to the crusher and water turbine.
When the discharged water hits the slit machine installed at an angle after discharge, the waste that cannot pass through will be led to the lower inner conduit and drained. The sewage that passes through the slit machine is guided to the outer waterway, and turns the water wheel.
Sewage from which filth is removed as much as possible is sent to the screen crusher and the water wheel, and the adhesion of the filth to the screen crusher and the water wheel is minimized to improve power generation efficiency.

For maintenance of the screen crusher and water wheel, raise the slit machine vertically,
If the slit machine cover is put on, the sewage cannot pass through the slit machine and is all guided to the inner conduit.
When the slitting machine is tilted horizontally and the slitting machine cover is put on, the sewage cannot pass through the slitting machine and is all guided to the outer conduit.
By operating the slit machine cover, the inflow of sewage in the inner and outer conduits can be freely changed, so that maintenance can be performed efficiently.

The screen crusher is mounted at a distance that reaches the slit machine when the blade of the screen crusher is opened while rotating, on the opposite side of the discharge port, diagonally above the slit machine.
It has a slag crusher drive motor. The slag crusher drive motor rotates with the power generation voltage of the generator, and the generated crusher drive motor is driven by the slag crusher drive shaft. It has a screen crusher transmission mechanism for transmission.
When the crusher is stopped, the blade of the crusher is folded small, while rotating,
When the blade of the residue crusher opens by centrifugal force, crushing starts, and at the same time, the blade of the crusher rotates through the gap of the slitting machine, and the dirt stuck in the gap is dropped.
The residue crusher plays a role in crushing residual dirt in sewage and preventing clogging of the slit machine, and contributes to efficient power generation.

It is a hydroelectric generator with a slit machine that integrates a slit machine, a water wheel, a drive shaft and a generator.
The inner and outer conduits are necessary and used together.
By making it an integral type, the installation space at the site is increased, the number of days for the site installation work is reduced, and the facility construction cost is reduced.

A screen crusher, a screen crusher motor, a water wheel, a drive shaft and a generator are integrated.
A hydroelectric generator with a crusher is used.
The slit machine, inner waterway and outer waterway are necessary and used together.
By making it an integral type, the installation space at the site is increased, the number of days for the site installation work is reduced, and the facility construction cost is reduced.

If it is judged that the existing manhole is too narrow or the installation environment is bad,
Establish a new manhole. The existing manhole is narrow and the environment is bad.
The new manhole as a new construction method is an absolute solution to the fact that the generator installation itself has been given up.
Installing a new manhole will solve all the problems such as narrow, odor, dirty, dangerous with sulfur gas, splashing sewage, rusting and decaying quickly.

The new manhole will be equipped with generators and other accessories. The new manhole will have a waterproof structure, and a flood alarm sensor and a drain pipe will be installed inside because the generator will drain water. The drain pipe is flooded from the new manhole to the existing manhole in order to allow rainwater, etc., that has been submerged in the new manhole, and then the slope is lowered so that the existing manhole side is lowered. By installing a check valve in the direction to close the inflow from the water, it prevents inflow of water and odors from the existing manhole. Most of the existing manholes are buried in the road, so it is difficult for civil engineering work to install a generator as close as possible, create a buried room, etc., and allow the car to run on it. Adopt a relatively low-priced waterproof manhole, which is a standard product, to shorten the construction period and reduce the construction cost. By installing a flood alarm sensor, drain pipe and check valve, it is more resistant to inundation of rainwater and intrusion of odors and enhances functionality.

Energy is saved by returning the generated electricity to the manhole pump control panel in the upstream manhole pumping station and using it in the manhole pump control panel. For that purpose, there is an aerial space between the manhole pump control panel in the upstream manhole pumping station and the generator control panel that takes in the electricity generated by the generator,
Or, laying electric wires, laying the electricity generated by the generator into the generator control panel, using the installed electric wires to transmit to the manhole pump control panel,
Used as a power source for manhole pumps in manhole pump control panels,
Surplus power is grid-connected and sold to the power company.

Image of current sewage treatment flow Types of current manholes How to install a hydroelectric generator for sewage flowing through the manhole invert Installation method of a hydroelectric generator that catches the sewage in the manhole's pumping pipe, (windmill type turbine with a crusher) Installation method of a hydroelectric generator that catches sewage in manhole pumping pipes (windmill type turbine) Installation method of a hydroelectric generator that catches the sewage in the manhole's pumping pipe (spiral turbine with a crusher) Installation method of a hydroelectric generator that catches sewage from the pumping pipe of a manhole pump station (windmill type turbine) Installation method of a hydroelectric generator that catches sewage from the pumping pipe of the manhole pump station Slit machine image Image of slag crusher Spiral water wheel and crusher image Manhole pump station maintenance image Image of integrated slit machine, residue crusher, water wheel and generator Manhole pump station hydroelectric generator image

DESCRIPTION OF SYMBOLS 1 Manhole 2 Manhole pumping station 3 House, shop, factory, etc. 4 River 5 Bridge 6 Receiving tank 7 Relay pumping station or treatment plant 8 Pumping pipe 9 Inflow pipe 10 Outflow pipe 11 Invert 12 Invert water turbine 13 Debris crusher motor 14 Inundation Alarm sensor 15 Generator drive shaft 16 Hydroelectric generator 17 Screen residue crusher drive shaft 18 Drain pipe 19 Check valve 20 Slot machine 21 Screen residue crusher (horizontal type)
22 Screen residue crusher (vertical type)
23 windmill type turbine 24 spiral type turbine 25 inner waterway 26 manhole pump
27 Outer water conduit 28 Hydroelectric generator control panel 29 Existing manhole pump control panel 30 Slit machine cover

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
Sewage is discharged from ordinary households and business establishments.
It is collected at the relay pump station or the treatment plant 7 via the manhole 1 and manhole pump station 2.
In the process of collecting sewage, manholes 1 and manhole pumping stations 2 will be installed at various points of junction and direction change.
As shown in Fig. 2, there are three types of manholes.
The manhole at the top of Fig. 2 has an inflow pipe and an outflow pipe in one straight line.
It is the form which connected between them with invert. Most are this type of manhole.
In this type, the energy of the sewage flowing through the invert is used to attach a turbine to the sewage and rotate the turbine as shown in Fig. 3.
The left side of the upper manhole in FIG. 3 is a side view of the invert turbine 12. The right side of FIG. 3 is a drawing in which the water turbine 12 and the generator 16 are accommodated in one manhole.
The two lower manholes in FIG. 3 are an invert turbine 12 and a generator 16.
However, one manhole is newly established instead of one manhole.

The existing manhole will be the “parent manhole” and the new manhole will be the “child manhole”.
If it is judged that the existing manhole is too narrow or the installation environment is bad,
Establish a new manhole. The existing manhole is narrow and the environment is bad.
The new manhole as a new construction method is an absolute solution to the fact that the generator installation itself has been given up.
If the new manhole is installed, it is narrow, smelly, dirty, dangerous with sulfur gas,
All problems such as splashing of sewage and rusting and rot will be solved.

The parent manhole has a very bad atmosphere and environment because sewage mixed with filth flows. Measures against sewage splashes and sulfide gas are required.
For this purpose, only the water turbine 12 is installed in the parent manhole, and a generator 16 that is sensitive to sewage and sulfur gas is installed in the child manhole with good atmosphere.

The invert turbine 12 in the parent manhole and the generator 16 in the child manhole are connected by a drive shaft 15 to transmit the rotational power of the turbine 12 to the generator 16 to generate power.

If the child manhole is submerged for any reason, there will be no escape for water, so a drain pipe 18 will be provided between the parent and child manholes. The drain pipe 18 has a low slope on the parent manhole side so that the water accumulated in the child manhole flows into the parent manhole, and a check valve 19 is installed when the water enters the parent manhole.

The check valve 19 prevents the backflow of sewage, sulfur gas and odor from the parent manhole.

The submersion warning sensor 14 is installed in the child manhole.
An alarm signal is sent to the generator control panel when more than a specified amount of water has entered the child manhole. The generator control panel reports an alarm signal to the administrator.

Figures 4, 5, and 6 are manholes with an inflow of a pressure pipe.
Figures 8 and 9 are manhole fields with inflow of pressure pipes. Two manhole pumps are installed in the manhole.

The upper drawing of FIG. 4 is an image diagram in which a slit crusher 20, a screen crusher 21, a windmill water turbine 23, a hydroelectric generator 16 and a screen crusher motor 13 are installed in one manhole.

The lower drawing of Fig. 4 is an image of installing a child manhole that cannot be stored in one manhole.
The rotational power of the water turbine 23 of the parent manhole is transmitted to the generator 16 of the child manhole by the generator drive shaft 15 to generate electricity.
The rotational power of the screen crusher motor 13 is transmitted to the screen crusher 21 of the parent manhole by the screen crusher drive shaft 17 and crushed.
Next to the pressure-feed pipe 8, a slit machine 20, a residue crusher 21 is installed diagonally above it, and a water wheel 23 is installed below it.
The slit machine 20 sends sewage with less waste to the residue crusher 21 and the water wheel 23.
The inner water guide channel 25 and the outer water guide channel 27 collect sewage and change the direction in which the sewage flows. The bent slab is covered with a vertical angle to the horizontal sewage flow to vertically flow the sewage. Change the direction to fall down.

Fig. 5 shows that only a turbine can be installed in the parent manhole. In this case, a windmill turbine 23 is installed.
A child manhole is newly established, and the rotational power of the windmill-type water turbine 23 is transmitted to the hydroelectric generator 16 through the driving device 15 to generate electricity.
A drain pipe 18, check valve 19 and inundation warning sensor 14 are also provided.

In Fig. 6, only the water wheel can be installed in the parent manhole. In this case, the spiral water wheel 24 is installed.
A crusher 22 is installed at the top of the spiral turbine 24.
Sediment crusher 22 judges installation in the situation of sewage.
A child manhole is newly established, and the rotational power of the spiral turbine 24 is transmitted to the hydroelectric generator 16 through the drive unit 15 to generate electricity.
A drain pipe 18, check valve 19 and inundation warning sensor 14 are also provided.

Fig. 7 is an image of manhole pump station 2 during maintenance.
Currently there are almost two pumps in the manhole pumping station 2. Equipped with automatic attachment / detachment device, slide pipe for lifting is prepared. During maintenance, lift the pump up,
Take it to the ground and treat it. Therefore, considering the pump lift,
The space available in the manhole pumping station is considered to be completely equivalent to installing a turbine or generator.
As mentioned earlier, the manhole pumping station has a very bad atmosphere and environment because sewage mixed with filth flows. Measures against sewage splashes and sulfide gas are required. In the manhole pump station due to the narrowness and bad environment, in the environment where generators and water turbines are installed,
No.

Figure 8 shows a manhole pumping station. Two manhole pumps are installed in the manhole. Therefore, the inside of the manhole is very narrow, and when manhole pump maintenance is performed, the manhole pump is pulled up, so it is necessary to secure a space for it.
Therefore, only the turbine can be installed in the parent manhole. In this case, a windmill turbine 23 is installed.
A child manhole is newly established, and the rotational power of the windmill-type water turbine 23 is transmitted to the hydroelectric generator 16 through the driving device 15 to generate electricity.
A drain pipe 18, check valve 19 and inundation warning sensor 14 are also provided.

Figure 9 shows the manhole pumping station. Two manhole pumps are installed in the manhole. Therefore, the inside of the manhole is very narrow, and when manhole pump maintenance is performed, the manhole pump is pulled up, so it is necessary to secure a space for it.
Therefore, only the water wheel can be installed in the parent manhole. In this case, the spiral water wheel 24 is installed.
A crusher 22 is installed at the top of the spiral turbine 24.
Sediment crusher 22 judges installation in the situation of sewage.
A child manhole is newly established, and the rotational power of the spiral turbine 24 is transmitted to the hydroelectric generator 16 through the drive unit 15 to generate electricity.
A drain pipe 18, check valve 19 and inundation warning sensor 14 are also provided.

FIG. 10 is an image diagram of the slitting machine 20.
The sewage discharged from the pressure pipe 8 is mixed with filth and foreign matter. As shown in Fig. 9, the slitting machine 20 has gaps arranged at regular intervals, and only allows items that are smaller than the gap to pass. . Anything that does not pass through the slit machine 20 and falls down is guided down by the inner water conduit 25 and drained. The sewage that has passed through the slit machine 20 is guided to the water wheel 23 by the outer water guide channel 27, and after rotating the water wheel 23, the sewage is guided from the outer water guide channel 27 to the inner water guide channel 25 and joins the sewage in the inner water guide channel 25. Drained.

For maintenance of the water wheel 23, the slit machine 20 is raised vertically,
When the slit machine cover 30 is put on, the function of the slit machine 20 stops,
All the sewage is guided to the inner waterway 25, and it will not go to the water wheel 23, and it will be possible to perform maintenance by returning to the sewage flow when there is no generator.

When the slitting machine 20 is tilted horizontally and the slitting machine cover 30 is put on, the function of the slitting machine 20 stops and all the sewage is led to the outer water guide channel 27,
You will not be able to go to the water wheel 23 and you will be able to return to the sewage flow when there is no generator.

FIG. 11 is an image diagram of a screen crusher (horizontal type) 21.
As shown in FIG. 10, the screen crusher (horizontal type) 21 is usually shrunk like a folded umbrella so that when the screen crusher (horizontal type) 21 starts rotating, the umbrella opens. Then, the crusher (horizontal type) 21 is also opened and crushing is started.

When the crusher (horizontal type) 21 is opened, the blade passes through the gap of the slitting machine and scrapes off the dirt attached to the gap while rotating it.
Prevents adhesion. When the water turbine 23 stops, the hydroelectric generator 16 cannot generate electricity, the residue crusher motor 13 also stops, and the residue crusher (horizontal) 21
Will also stop, shrink and return.

FIG. 12 is an image diagram of the spiral water wheel 24 and the residue crusher (vertical type) 22.
As shown in FIG. 9, the crusher (vertical type) 22 is usually folded up with an umbrella.
When the spiral turbine 24 starts to rotate with water pressure, it is coaxial and the crusher (vertical) 22 starts to rotate.
As the umbrella opens, the crusher (vertical) 22 also opens and crushing starts.
When the spiral turbine 24 stops, the residue crusher (vertical type) 22 stops,
Shrink back to the original.

In FIG. 13, the pumping pipe 8 flowing into the manhole pumping station 2 is cut back, a child manhole 1 is newly installed, and in the child manhole 1,
The slit machine 20, the water wheel 23 and the generator 16 install the integrated hydro generator 16 with a slit machine.
Install inner waterway 25 and outer waterway 27.
In the situation of sewage, we installed a screen crusher 21, a screen crusher, a water wheel,
Install a generator-integrated generator with a residue crusher.

The screen crusher 21 has a screen crusher motor 13 and uses the power generation voltage of the generator 16. The blade of the screen crusher 21 is shrunk when stopped,
Open during rotation.

The sewage that has finished its role by rotating the water wheel is drained by the outer conduit, and merged with the sewage from the inner conduit, and drained to the parent manhole.

Fig. 14 shows that the sewage pumped from the upstream manhole pumping station is sent directly to the hydroelectric generator, and the generated electricity is returned to the upstream manhole pump control panel by an overhead line or underground buried line. It will be connected to sell electricity to the power company to reduce the amount of power used at the manhole pump station.

By the way, let's calculate the amount of power that can be generated when the upstream manhole pumping station pumps with a pump of 22KW.

The generated power is expressed as P = 9.8 × Q × H.
Unit: P: Electric power (KW) 9.8: Constant Q: Flow rate (m3 / S) H: Head (m)

According to the pump performance curve, Q: 5 (m3 / min) When M is converted to S, Q: 4/60 (m3 / S)
H: 12m
If 85% is transmitted as it is,
Because P = 9.8 × Q × H
P = 9.8 × 5/60 × 12 × 0.85 = 8.33 kW
22KW-8.33KW = 13.67KW

In other words, if the water pumped by the 22KW pump can be recovered by 85% electricity at the pumping destination, it is recovered by 8.33KW and deducted by 13.67KW.
However, it will not consume electricity.

The present invention is a hydroelectric power generation system that uses the flowing hydropower of sewage generated in sewerage facilities.
As sewage in sewer facilities, human waste from flush toilets, domestic wastewater generated by cooking, bathing and washing at home, shops, hotels,
There is industrial wastewater from the business establishments from the town factory to the large factory.
These sewage are buried in the sewage pipes and are basically sent by a natural flow method.

Manholes are installed at points that change the direction of flow, merge points, and branch points.

If all the sewage is sent under natural flow, the cost of sewage treatment can be reduced. However, as shown in Fig. 1, in fact, the collected sewage is pumped at a reverse slope, at a junction or over a river, etc. You cannot send water without help.
Therefore, there are many manhole pump stations where two sewage pumps are installed in the manhole.

Sewage is sent to the treatment plant through several manholes and manhole pumping stations. Therefore, the amount of sewage is small at first, but eventually it is huge.
A large amount of sewage collects at the treatment plant.

At first, the amount of sewage is small, so it is a small capacity pump.
Discharged at the pressure destination.

The electric energy is used comprehensively, and pumping and discharging are repeated. An effective method of changing the hydroelectric energy of a large amount of sewage sewage to electrical energy has not been put into practical use yet, and it is simply wasted into the river as sewage treatment water.

An object of the present invention is to provide a hydroelectric power generation system that uses the flowing hydropower of sewage sewage as a water source for a hydroelectric generator and that can sufficiently cope with environmental problems and energy saving.

Manholes and manhole pump stations are narrow and generate sulfur gas.
However, it is not an environment where a hydroelectric generator is installed.

As a solution to this problem, a new manhole will be installed next to the manhole or manhole pumping station where the hydroelectric generator will be installed.

The existing manhole or manhole pumping station will be called “parent manhole” and the new manhole will be called “child manhole”.

A water wheel is installed in the parent manhole, and hydropower is installed in the child manhole.
Install the generator body.

The parent manhole is very small, and the surrounding environment is also worst, such as the generation of sulfur gas, inflow of sewage, and high humidity. Only water turbines with a simple structure,
Installed in the parent manhole.

The hydroelectric generator itself, which has a complicated structure and requires the best ambient environment and wide maintenance space, is installed in the child manhole.

The main manhole turbine and the child manhole hydroelectric generator are connected by a drive shaft.

        The drive shaft adopts direct drive system and chain drive system.

The rotation of the drive shaft is increased through the gearbox and placed in the hydroelectric generator.

By reusing sewage for hydroelectric power generation and efficiently recovering the electrical energy used during sewage treatment, sewage treatment costs are reduced.
Great social effect.

        Great energy saving effect and large CO2 reduction effect.

There are several advantages to installing a new manhole and installing a hydroelectric generator.

For one, hydroelectric generators can be installed in a good environment free of sulfur gas.

Next, if the size of the new manhole is examined, maintenance space for the hydroelectric generator can be secured.

Finally, considering the size of the new manhole, a large capacity hydroelectric generator can be installed.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
Sewage is discharged from ordinary households and business establishments.
It is collected at the relay pump station or the treatment plant through the manhole and manhole pump station.
In the process of collecting sewage, manholes and manhole pumping stations are installed at various points in the junction and direction change points.

As shown in Fig. 2, there are three types of manholes.
The manhole at the top of Fig. 2 has an inflow pipe and an outflow pipe in one straight line.
It is the form which connected between them with invert. Most are this type of manhole.

In this type, the energy of the sewage flowing through the invert is used to attach a turbine to the sewage and rotate the turbine as shown in Fig. 3.

The second manhole in Figure 2 is the type that has an inflow pipe. With this type, if there is a difference in height between the inflow pipe and the water turbine, a drop will occur. As shown in Fig. 3, rotate the water wheel with the pressure of the sewage coming out of the inflow pipe and falling.
The sewage coming out of the inflow pipe is classified into sewage coming out under natural flow and pressure-feeding water from the upstream manhole pumping station. In the case of pressure feed water, it is sent at a pressure commensurate with the pump output.

The third manhole in Figure 2 is the manhole pumping station. Across the river,
It is installed when sending pressure from bottom to top or at a junction. To collect sewage
When it reaches a certain water level, the pump operates and pumps the sewage to the next manhole.

In Fig. 3, a water turbine 12 is installed in the parent manhole, and a hydroelectric generator 16 is installed in the child manhole.
The turbine is turned by the flow of sewage flowing through Invert. The rotation of the water turbine 12 is transmitted to the child manhole through the drive shaft 15.

The power of the drive shaft is transmitted to the hydroelectric generator 16 through the torque limiter and speed increaser to generate electricity. The torque limiter protects the entire device from overload.

  Two through holes are made in the parent and child manhole.

One hole is a through hole for the drive shaft between the hydroelectric generator and the turbine, and seals after passing through the drive shaft.

The other hole is for bypass piping to let the main manhole flow down naturally when water enters the child manhole for some reason.
Bypass pipe 18 provides a slope on the parent manhole side, allowing water that has been flooded into the parent manhole from the child manhole.

Attach the check valve 19 to the bypass pipe when it enters the parent manhole. A check valve prevents intrusion of sewage, sulfur gas and odor from the parent manhole.

A flood warning sensor is attached to the child manhole.
An alarm signal is sent to the generator control panel when more than a specified amount of water has entered the child manhole. The generator control panel reports an alarm signal to the administrator.

Figure 5 shows a manhole with an inflow pipe. The water turbine 23 is installed in the parent manhole, and the hydroelectric generator 16 is installed in the child manhole. Install the water wheel 23 under the inflow pipe 9. It is transmitted to the drive shaft 15 through the chain drive, and is transmitted to the hydroelectric generator through the torque limiter and speed increaser.

          Bypass piping 18, check valve 19 and inundation warning sensor 14 are also provided.

Figure 7 shows the manhole pumping station. The water turbine 23 is installed in the parent manhole, and the hydroelectric generator 16 is installed in the child manhole. Install the water wheel 23 under the inflow pipe 9. It is transmitted to the drive shaft 15 through the chain drive, and is transmitted to the hydroelectric generator through the torque limiter and speed increaser.

          Bypass piping 18, check valve 19 and inundation warning sensor 14 are also provided.

Fig. 14 is an image of a child manhole installed in the immediate vicinity of the parent manhole, a utility pole installed in the vicinity, a generator control panel installed, and piping buried. Generator wire, flood alarm sensor signal and torque limiter alarm are output to generator control panel 28.

Claims (6)

A slit machine that receives the discharge water of the pressure feed pipe in the manhole, and has an inner water guide channel and an outer water guide channel that are perpendicular to and parallel to the slit machine, and the slit machine has a discharge direction of the discharged water. Is installed in a state where the angle can be changed back and forth,
The slit machine can be raised vertically, or laid horizontally, and covered with a slit machine cover, and a generator turbine is attached inside the outer water conduit,
The power-recovering hydraulic power, comprising: the generator turbine that rotates in response to the discharged water; and a transmission mechanism that rotates the generator turbine and transmits the generated rotational power to the generator through a drive shaft. Power generation system. The screen crusher is attached at a distance that reaches the slit machine when the blade of the screen crusher opens while rotating, on the opposite side of the discharge port on the diagonal of the slit machine,
When the screen crusher is stopped, the blade of the screen crusher is folded small,
During rotation, the blade of the screen crusher is opened widely by centrifugal force, the screen crusher has a screen crusher motor as a screen crusher drive shaft, and the screen crusher motor is Using the electricity generated by the generator, the rotational power of the screen crusher motor is transmitted to the screen crusher by the screen crusher drive shaft,
The power recovery hydraulic power generation system according to claim 1. The generator according to claim 1, wherein the slit machine, the water wheel,
The power recovery hydroelectric power generation system according to any one of claims 1.2, wherein the generator with a slit machine is formed by integrating the drive shaft and the generator. The generator according to claim 1 and the residue crusher, wherein the residue crusher, the water wheel, the drive shaft and the generator are integrated into a generator with a residue crusher. The power recovery hydroelectric power generation system according to any one of claims 1 to 3, wherein A new waterproof manhole is installed adjacent to the manhole.
The generator and the residue crusher drive motor are installed in the new manhole,
A generator drive shaft to the generator and the water wheel, a residue crusher drive motor, and a residue crusher drive shaft to the residue crusher, respectively, to transmit rotational power;
The power source for the crusher driving motor is internally supplied with the power generation voltage of the generator,
The new manhole is provided with an inundation warning sensor and a drain pipe, and the drain pipe is piped from the new manhole to the manhole,
5. A check valve is provided in a direction to close the inflow from the manhole when the manhole side is inclined so that the manhole side is lowered and enters the manhole. The power recovery hydroelectric power generation system described in 1. An electric wire is installed between the manhole pump control panel and the generator control panel in the upstream manhole pumping station, between the generator control panel and aerial or buried, and the electricity generated by the generator is converted into the generator. Into the control panel,
Using the electric wire, transmitting power to the manhole pump control panel, and using the manhole pump control panel as a power supply for the manhole pump,
The power recovery hydroelectric power generation system according to any one of claims 1 to 5, wherein surplus power is grid-connected and sold to an electric power company.