KR20100006739A - Appliance for generating micro hydropower with deep wastewater tunnel - Google Patents

Abstract

PURPOSE: A small water power generating apparatus using a large depth sewage tunnel is provided to produce the electric energy by operating a generator with a rotator rotated by the flow of the flowing water flowed into a large depth sewage tunnel through an inflow sewer. CONSTITUTION: A small water power generating apparatus using a large depth sewage tunnel comprises a rotator and a generator. The rotator is installed inside an inflow sewer of a large depth sewage tunnel. The generator is rotated by the flow of the flowing water flowed into the large depth sewage tunnel through the inflow sewer. The generator converts the rotary power of the rotator to the electric energy.

Description

Small hydro power plant using deep sewage tunnel {Appliance for generating micro hydropower with deep wastewater tunnel}

The present invention relates to a small hydro power plant that produces electricity by using a drop in a large depth sewage tunnel.

The runoff due to rainfall is expressed by the following equation and depends on rainfall intensity (I), watershed area (A), and runoff coefficient (C).

Q = 1 / 3.6 CIA

{Q: Rainfall runoff (m / sec), C: Runoff coefficient, I: Rainfall intensity (mm / hr),

A: Basin area (km ² )}

Rainfall runoff at the same area and at the same rainfall intensity is affected by runoff coefficients that depend on the condition of the surface. Rainfall runoff coefficients generally depend on the surface conditions of the watershed, and representative runoff coefficients are shown in Table 1.

Type of area Runoff coefficient Surface shape Runoff coefficient Commercial district 0.7-0.95 Watertight roof 0.7-0.95 House 0.3-0.5 Asphalt road 0.85-0.9 Multi-family Housing (Isolated) 0.4-0.6 Concrete road 0.8-0.95 Multi-family house (row) 0.6-0.75 Paved chairs, sidewalk 0.75-0.85 Residential Area (Suburb) 0.25-0.4 Gravel road, sidewalk 0.15-0.3 Apartment area 0.5-0.7 Lawn, sandy ground (2% slope) 0.05-0.1 Light industrial area 0.5-0.8 Lawn, sandy ground (2-7% slope) 0.1-0.15 Heavy industry 0.6-0.9 Lawn, sandy ground (more than 7% slope) 0.15-0.2 Park 0.1-0.25 Lawn, heavy soil (2% slope) 0.13-0.17 Playground 0.2-0.4 Lawn, heavy soil (2-7% slope) 0.18-0.22 An undeveloped area 0.1-0.3 Lawn, heavy soil (more than 7% of slopes) 0.25-0.35

As can be seen from the table, the runoff coefficient increases when the surface permeability decreases, resulting in an increase in runoff. As the city expands, the impermeable pavement area increases, resulting in an increase in the runoff coefficient, which results in an increase in the runoff and an increase in the peak rate. The change in outflow due to such urbanization is shown in FIG. 1, and as the urbanization progresses, the infiltration amount decreases due to an increase in the impermeable area, and thus the outflow amount increases. For this reason, when the same intensity of rainfall occurred in urbanized areas, floods did not occur in the past, but due to the increase of runoff coefficients, runoff increases and consequently causes floods.

Rainfall problems in urban areas do not end with this simple increase in runoff. In urban areas, pollutants that have been distributed on the surface during non-rainfalls are leaked in a short time during rainfall and contaminate water systems, which is a direct cause of fish death. Outflow of pollutants due to such rainfall is concentrated in the early stage of rainfall as shown in FIG. This phenomenon is called first-flush and is characterized by high concentrations of pollutants. It is known that SS concentration of urban sewage is 100-350mg / L and SS concentration is 150 ~ 400mg / L according to the initial rainfall.

When contaminants are generated according to the initial excellent water, the conventional treatment system directly discharges to the water system in an untreated state for a flow rate exceeding a treatable amount as shown in FIG. 3. This is because the treatment capacity of the sewage treatment plant is designed to treat only sewage during the dry season (see FIG. 4), and thus it is impossible to treat the increased flow rate according to the rainfall. The deep sewage tunnel is designed to solve the problems of the existing sewage treatment system and to simultaneously solve the flooding problem caused by the increased flow rate.

An example of such a large depth sewage tunnel is shown in FIG. 5. The deep-depth sewage tunnel is built underground, and the initial effluent containing high concentration pollutants enters the deep-depth sewage tunnel at the beginning of the rainfall, and the tunnel is filled with the initial effluent over time. When the rainfall is finished, a certain amount of water is introduced into the sewage treatment plant or a separate treatment facility using a pump to treat pollutants (FIG. 6).

This large depth sewage tunnel can be used for various purposes, but the main purpose is to control the pollutants by storing the initial rainwater containing excessive amount of pollutants at the beginning of the rainfall and then conducting separate treatment after the rainfall is over. It is to control the flood by controlling the initial rainfall. In recent years, efforts have been made to use such large depth sewage tunnels for various purposes, and they perform various functions such as transportation, such as roads, as well as simple storage functions. These deep sewage tunnels are being constructed and operated in several countries, such as the United States, Japan, Singapore, Malaysia, and others.

Since such a large depth sewage tunnel is located underground, a drop occurs when the initial rainwater flows in. If free fall occurs in conduit, damage of conduit may occur due to impact or friction caused by free fall. In order to prevent damage to the conduit, a separate facility such as a screw-type energy dispersing facility illustrated in FIG. 7 should be installed.

Recently, oil prices have been continuously rising, and interest in energy is increasing. In Korea, since hydropower generation is limited due to the construction of large dams, interest in small hydro power has increased since the 1980s, and research and feasibility studies have been actively conducted. Small-scale power generation means low-flood power generation with no large free fall for power generation. In general, the amount of power that can be obtained through hydropower generation can be obtained from the following equation.

P = 9.8 × Q × H

{P: Output (kW), Q: Flow (m ³ / sec), H: Total free fall (m)}

By the way, it is known that there are about 40 to 50 small hydro power generation areas, and even this construction is difficult due to civil complaints.

The present invention has been made to solve the problems described above, the object of the present invention is to additionally hydrophobic power generation in a multi-functional deep sewage tunnel used for various purposes such as road control, flood control, initial excellent storage, sewage as well as roads In order to have the energy recovery function through.

In order to achieve the above object, the present invention, the rotary body is installed in the inlet conduit of the large depth sewage tunnel and rotates by the flow of flowing water flowing into the large depth sewage tunnel through the inlet conduit, and the rotational force of the rotating body It proposes a hydroelectric power generation facility using a large depth sewage tunnel, characterized in that it comprises a generator for converting the electric energy into electrical energy.

Here, the rotating body may include a rotating shaft rotatably installed in the inflow conduit, and a blade provided on an outer circumferential surface of the rotating shaft.

In addition, the rotating body may be configured to include a tube aberration.

A plurality of the rotating body may be installed in a plurality of portions in the inlet conduit, respectively, wherein the plurality of the rotating body is preferably installed at different heights in the inlet conduit, respectively.

On the other hand, according to the present invention, there is provided a deep sewage tunnel is provided with a hydrophobic power generation facility on the inlet pipe.

According to the present invention, it is possible to recover the energy discarded by generating electricity through power generation in a large depth sewage tunnel for pollutants and flood control as eco-friendly renewable energy.

Hereinafter, with reference to the drawings will be described the present invention in more detail.

The present invention proposes a configuration for installing a device for obtaining the rotational force required for power generation in the deep sewage tunnel inlet conduit. An example showing the basic configuration of such a device is shown in FIG. 8, and in order to prevent damage to the conduit, the existing facility is installed to obtain rotational power for the purpose of energy dissipation.

The hydrophobic power generation facility of the present invention includes a rotor installed at an end portion of an inlet pipe, that is, a large depth sewage tunnel inlet, and a generator for converting the rotational force of the rotor into electrical energy. The rotating body is configured to have a configuration somewhat similar to the conventional screw type dispersing facility shown in FIG. That is, the rotating body is composed of an axis rotatably vertically installed in the inflow conduit and blades arranged spirally in the section around the outer peripheral surface of the axis. The shape or number of blades may adopt any form such that the downwardly moving rain drops fall on the blades to rotate the rotating shaft.

Rainfall, which moves downward as the initial rainwater flows in and moves downward, falls on the screw-type spiral blade and, as a result, rotates the rotation axis. Accordingly, the rotating body rotates, and the rotating force is transmitted to the generator to perform power generation. By doing so, it is possible to recover the free fall energy that damages the conduit to prevent damage to the conduit, and at the same time, it is possible to generate power using the recovered free fall energy.

9 and 10 show another example of the hydropower generator installed in the large depth sewage tunnel according to the present invention. In the present embodiment, the assembly of the generator and the rotating body having the same configuration as the embodiment shown in Fig. 8 is sequentially arranged in the inlet conduit configured to be stepped downward to constitute a multi-stage power generation apparatus.

When the water level of the large depth sewage tunnel rises, as shown in FIG. 10, a rotor submerged in water is generated. In this case, the rotor submerged in water is unable to generate power due to a decrease in rotational force or rotation. Therefore, by separating the rotor into a plurality of height difference installation can be achieved that the power generation is possible through the remaining rotors that are not submerged in water even if some rotors can not generate power.

FIG. 11 uses tubing aberration as another embodiment of the present invention. Tubing aberration is a method frequently used in small hydro power generation. In the present invention, the tubing aberration is installed on the upper depth sewage tunnel to generate power, and a screw type power generator is installed on the lower part to maximize energy recovery. 12 shows an embodiment in which the rotor has an aberration form.

Sewage treatment plants that were initially constructed are often located in the city center because, as the city developed, the treatment plants initially located outside the city resulted in the result of being located in the city center due to the increase of population and the expansion of the city center. to be. The treatment plant located in the center of the city is recognized as a disgusting facility by the citizens living in the surrounding area and provides a cause for many complaints. In order to solve this problem, the treatment plant may be moved to the outskirts of the city, and a large depth sewage tunnel may be constructed and used to transport sewage and initial rainwater generated at this time (FIG. 13). The deep-depth sewage tunnels carry only the sewage flow into the Cheongcheon-si, and during the rainfall, they perform the initial excellent storage, which is the original function of the deep-depth sewage tunnels. In this case, the treatment plant located in the city center may perform only the first treatment and then flow into the large depth sewage tunnel to solve a problem that may occur due to precipitation of solids in the large depth sewage tunnel. The present invention can also be applied to the multi-use large depth sewage tunnel connecting the sewage treatment plant, in this case, it is possible to maximize the power generation efficiency because it is possible to generate power using rainwater in the case of rainfall and the sewage can be generated during the charging. But constant power is possible. In the case of a large depth sewage tunnel, which only stores the initial excellent water, it can be generated only during rainfall, so it is limited to the time when power generation is possible, but the utility of the power generation facility is lowered. This further reduces the time it takes to recover the initial investment. In addition, the large depth sewage tunnel connecting these sewage treatment plants removes contaminants through pretreatment before the sewage and rainwater inflow, thereby preventing the facility from being worn or damaged by the contaminants, thereby extending the life of the power plant. It is also easy to maintain large depth sewage tunnels.

14 is a conceptual diagram of a multi-purpose large depth sewage tunnel, a method of using a large depth sewage tunnel as a simple rainwater and sewage storage facility instead of using the upper portion of the tunnel as an automotive tunnel. Even in this case, the power generation equipment of the present invention can be applied.

According to the present invention, it is possible to recover the energy discarded by generating electricity through power generation in a large depth sewage tunnel for pollutants and flood control as eco-friendly renewable energy.

1 shows the change of rainfall runoff according to urbanization.

Figure 2 shows the change of pollutants in the initial rainfall during rainfall.

3 shows an initial excellent treatment method of the existing treatment system during rainfall.

Figure 4 shows a treatment method of the existing sewage treatment system in Cheongcheon.

5 is a conceptual diagram in which initial rainfall is introduced into a large depth sewage tunnel during rainfall.

6 is a conceptual diagram of the initial rainwater stored in the large depth sewage tunnel after the rainfall is finished to enter the sewage treatment plant.

7 is an embodiment of the system for preventing the damage of the conduit caused by the fall in the large depth sewage tunnel.

8 is an embodiment in which a power generation facility is introduced in a large depth sewage tunnel.

9 is a conceptual diagram of a power plant for maximizing energy recovery by separating the rotor.

10 is a conceptual diagram showing the state of the rotating body according to the rise in water level during rainfall.

11 is an embodiment of power generation using tubing aberration in a large depth sewage tunnel.

12 is an embodiment in which a rotor of aberration type is applied in a large depth sewage tunnel.

13 is a conceptual diagram of a large depth sewage tunnel connecting the sewage treatment plant.

14 is a conceptual diagram of a large depth sewage tunnel that the upper portion is used as a tunnel for automobiles.

Claims (6)

A rotating body installed in an inflow conduit of a large depth sewage tunnel and rotating by a flow of flowing water flowing into the large depth sewage tunnel through the inflow conduit, and A hydropower plant using a large depth sewage tunnel, characterized in that it comprises a generator for converting the rotational force of the rotating body into electrical energy. The method of claim 1, The rotating body, A rotating shaft rotatably installed in the inflow pipe; and Small hydro power generation facility using a large depth sewage tunnel, characterized in that it comprises a blade installed on the outer peripheral surface of the rotary shaft. The method of claim 1, The rotating body is a hydropower plant using a large depth sewage tunnel, characterized in that it comprises a tubular aberration. The method of claim 1, A hydrophobic power generation facility, characterized in that a plurality of said rotating bodies are respectively provided in a plurality of parts in said inflow pipe. The method of claim 4, wherein The plurality of rotors are hydrophobic power generation facility, characterized in that each installed at a different height in the inlet conduit. A deep sewage tunnel, wherein the hydrophobic power generation system according to any one of claims 1 to 5 is provided on an inflow pipeline.

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