JPH0629570B2 - Power generation system - Google Patents

Description

The present invention relates to a power generation system in which wastewater treatment and power generation are organically combined.

<Conventional technology and its problems> Facilities such as gymnasiums, movie theaters, theaters, and general hospitals consume a large amount of power and need to avoid confusion and danger at the time of power outage, so that they can be used as spare or emergency homes. Equipped with a power generator. Since these facilities are constructed near residential areas or in downtown areas, they are opposite in purpose and nature to the sewage treatment facilities that generate odors, and sewage treatment facilities are installed in the suburbs of residential areas. It is common.

Therefore, it is the current situation that the above-mentioned various facilities and the wastewater treatment facility are constructed in a place far apart from each other, and the facility in which these are organically combined has not yet been constructed.

INDUSTRIAL APPLICABILITY The present invention is an organic combination of sewage treatment and power generation, and in particular, makes the odor generated from sewage odorless at the same time as power generation, thereby providing various facilities and a sewage treatment facility in one building The purpose is to provide such a power generation system.

<Means for Solving Problems> In order to achieve the above object, the present invention separates a sewage treatment tank into an underground part of a building, and a bad smell from the sewage treatment tank is applied to a gas turbine generator driven at high temperature. It is something that is supplied. That is, the power generation system according to the present invention includes a treatment chamber that isolates a sewage treatment tank provided in a basement of a building, a gas turbine generator that supplies electric power to the building, and a chimney that performs exhaust gas. It is characterized in that the processing chamber is adjusted to a negative pressure, and a supply path for sending the air in the processing chamber to the gas turbine generator as air for fuel combustion is provided.

<Example> Hereinafter, the present invention will be described more specifically with reference to the drawings.

FIG. 1 is a schematic sectional view of an embodiment of the present invention, FIG. 2 is a plan view of an underground portion thereof, and FIG. 3 is a block diagram of a power generation system. The building 1 is built in a residential area or a downtown area and constitutes various facilities such as a gymnasium, a movie theater, and a theater. The building 1 is composed of an above-ground portion and an underground portion, the above-mentioned various facilities are provided above the ground portion, and a treatment room 2 for treating wastewater and a power generation room 3 for generating electricity are provided in the underground portion. The treatment room 2 treats human waste, domestic wastewater, etc. discharged from surrounding residential areas and downtown areas so as to meet environmental standards, and is provided with various sewage treatment tanks. This sewage treatment tank is
Sand settling tank 4, aeration tank 5, settling tank 6, nitrification tank 7, denitrification tank 8,
It is composed of a coagulating sedimentation tank 9, and a flow rate adjusting tank, a deaeration tank, and a disinfection tank (none of which are shown) are appropriately connected in the middle. The sand settling tank 4 is the soil in the wastewater flowing from the introduction pipe 10,
Foreign substances such as sand and paper are removed, and the aeration tank 5 performs aeration to settle sludge in a settling tank 6 following the aeration tank 5.
The nitrification tank 7 mainly oxidizes and decomposes ammonia, and the denitrification tank 8 reduces and removes nitric oxide.
D, COD, SS are reduced and phosphorus compounds and nitrogen compounds are decomposed, and sewage that conforms to the environmental standard value is discharged from a discharge pipe 11 to a river or the like through a coagulating sedimentation tank 9. In addition,
Such a series of sewage treatment tanks are arranged in a plurality of rows in the treatment chamber 2 so that even a large amount of sewage can be accommodated. The processing chamber 2 is separated from the above-ground portion, the power generation chamber, and other rooms by a concrete wall and a door, and the inside is adjusted to a negative pressure. This negative pressure adjustment is maintained by the fan 12 in this embodiment.
That is, the air supply duct 13 and the intake duct 1 are provided in the processing chamber 2.
4 are opposed to each other above the sewage treatment tank, and the fan 12 is attached to the intake duct 14. Therefore, when the fan 12 is driven, the inside of the processing chamber 2 is depressurized by the intake duct 14, and the outside air flows in from the air supply duct 13, but the discharge amount and the inflow amount are determined by the valves 15 and 1.
A negative pressure state is obtained by adjusting with 6. The intake duct 14 is connected to a supply passage 32 for sending the air in the processing chamber 2 to the gas turbine generator 17 as fuel combustion air, as will be described later. By isolating the processing chamber 2 from the other rooms of the building 1 and maintaining the negative pressure in the processing chamber 2 in this way, the air in the processing chamber 2 leaks from the other rooms except the intake duct 4. In addition, since the outside air flows in only one way even if the door of the treatment room 2 is opened, the offensive odor generated from the sewage treatment tank does not leak to the outside, especially various facilities on the ground, and gives an unpleasant feeling. Disappears.

Like the processing chamber 2, the power generation chamber 3 is separated by a concrete wall, and a generator 17 is provided inside the power generation chamber 3 to supply electricity to various equipment such as lighting fixtures and air conditioners of various facilities provided on the ground. It is supposed to be supplied. In the present invention, the generator 17 is a gas turbine generator. The gas turbine generator 17 has a power generator built into a jet engine that serves as a driving force for an aircraft, a ship, etc., and a conventionally known one can be used. Therefore, details thereof will be omitted. 80
Combustion is performed at a high temperature of 0 ° C or higher, and by utilizing this high temperature, the odor is eliminated and the heat energy is effectively used. First, in order to eliminate the bad smell, the air in the processing chamber 2 sucked by the intake duct 14 is supplied from the supply passage 32 to the gas turbine generator 1.
It is carried out by leading to No. 7 and supplying as fuel combustion air. Further, effective use of heat energy is performed by introducing exhaust gas from the gas turbine generator 17 to the heat exchanger 18. Here, the gas turbine generator 17 generates noise when driven, but this noise is generated by the gas turbine generator 1.
Since it is a high-frequency sound wave generated from the high-speed rotation speed of 7, it is not easily absorbed by the surrounding concrete wall and propagated to the outside. Therefore, noise does not reach each facility of the building 1, and no noise obstacle occurs.

Next, the power generation system will be described with reference to FIG. In the figure, 19 is a fuel tank, 20 is a chimney, 21 is a heat storage tank, 22 is an air conditioner, and 23 is a hot water supply tank. The gas passage 24 of the exhaust gas from the gas turbine generator 17 is branched into a first gas passage 25 connected to the heat exchanger 18 and a second gas passage 26 connected to the chimney 20, and the first gas passage 25 is connected to the first gas passage 25. After exiting the heat exchanger 18, the gas passage 25 is connected to the second gas passage 26. Valves 27 and 2 are provided in each gas passage 25 and 26.
8 is arranged to open and close the gas passage and adjust the flow rate, whereby the gas turbine generator 17
Exhaust gas from the heat exchanger 1 mainly flows from the first gas passage 25.
8, but directly from the second gas path 26 to the chimney 20.
It is also possible to be released into the atmosphere by being guided by.
The direct discharge from the gas passage 26 is to transfer the exhaust gas to the heat exchanger 18
It is carried out when the latent heat of exhaust gas is not used without being guided to. Fuel such as heavy oil is supplied to the gas turbine generator 17 from the fuel tank 19, and air for fuel combustion is supplied from the processing chamber 2. The air in the treatment chamber 2 contains malodorous gases such as hydrogen sulfide, phenol, mercaptan, and ammonia generated from various sewage treatment tanks and is exposed to a high temperature of 800 ° C. or higher in the gas turbine generator 17. As a result, these are decomposed by heat to be malodorized. As a method for deodorizing such malodorous gas, conventionally, adsorption of activated carbon, redox treatment, or introduction into the ground and decomposition by bacteria in the ground are performed, but treatment of sewage that generates a large amount of malodorous gas Not only was the operation cumbersome and expensive to apply to facilities, but it was also impossible to completely eliminate odor. Further, the above malodorous gas has high temperature resistance and cannot be thermally decomposed by the combustion heat generated by a diesel engine or the like. Gas turbine generator 1 according to the present invention
In the case of No. 7, combustion heat at a high temperature of 800 to 850 ° C. is generated from the jet engine, and since it is exposed to this high temperature, the malodorous gas is easily decomposed and deodorized. Further, a large amount of air is required to drive the jet engine, but since all this air is supplied from the processing chamber 2, even if a large amount of malodorous gas is generated from the sewage treatment tank, complete malodorization is possible. ing. As a result, there is no offensive odor pollution from the sewage treatment tank, and the sewage treatment plant can be installed in the residential area. 29 is a branch pipe connected to the chimney 20 via a three-way valve 30,
It serves to direct the air from the processing chamber 2 directly to the chimney 20. This branch pipe 29 is used when a large amount of malodorous gas is not contained in the air in the processing chamber 2 and does not cause a bad smell in the surroundings, so that the air is directly emitted from the chimney 20 to the gas turbine generator 17. Do not supply air. As a result, the gas turbine generator 17 is not violated by the malodorous gas and the life can be extended.

The heat exchanger 18 receives the exhaust gas from the gas turbine generator 17, and heats water by the latent heat of the exhaust gas. This heating is performed in two stages to obtain high temperature water having a temperature of about 80 to 85 ° C. and heat storage water having a lower temperature (about 55 to 65 ° C.) than the high temperature water. In the figure, 30 is a high temperature circulation path through which high temperature water circulates,
The high temperature part 18a of the heat exchanger 18, the hot water supply tank 23, and the cooling / heating device 22 are connected so that high temperature water circulates. Reference numeral 31 is a heat storage circulation path through which the heat storage water circulates, and is connected between the heat storage portion 18b of the heat exchanger 18 and the heat storage tank 21 so that the heat storage water circulates. Therefore, the high-temperature exhaust gas discharged from the gas turbine generator 17 becomes a low temperature by the heat exchanger 18 and is discharged from the chimney 20, the latent heat of the exhaust gas is converted into the thermal energy of water, and the thermal energy described below is effectively used. Is done. First, the high-temperature water is guided from the high-temperature circulation path 30 to the hot water supply tank 23 and the cooling / heating device 22. The hot water supply tank 23 supplies high-temperature water to the water supply, the shower equipment, the bath, etc., which are piped to the building 1. On the other hand, the building 1 is formed with each hole 37 according to the purpose of use, and each hole 37 is provided with an air conditioner 38 for cooling and heating. The air conditioner 2
2, a heat pump is used, for example, and each air conditioner 38 is driven by high temperature water. Therefore, hot water from the heat exchanger 18 is used for hot water supply and cooling / heating, so that no power supply is required to drive them, and power can be saved. Next, the heat storage water stored in the heat storage tank 21 is applied to the floor heating of the building 1 through the pipe 39. Therefore, under the floor of the building 1, a plurality of pipelines 40 through which the stored heat flows are laid, and when the stored water is supplied to the pipeline 40 by a pump (not shown) or the like, the entire floor becomes hot. It is heated and the floor is heated. As a result, the latent heat of the exhaust gas is used for floor heating, which enables effective use of heat energy. Such floor heating does not generate noise due to air flow unlike air conditioning and heating in which warm air is forcibly sent into the room. Therefore, it is particularly effective in the case where the building 1 is a facility such as a concert hall or a conference hall where noise is a concern because heating without noise interference is possible. It is also possible to supply hot water to a hot water pool or the like by increasing the amount of water stored in the heat storage tank 21 because the yield of the heat storage water is higher than that of the high temperature water.

In the above embodiment, the exhaust gas from the gas turbine generator is heat-exchanged to effectively utilize the heat energy, but the heat exchanger may be omitted in the present invention.

<Effects of the Invention> As described above, according to the present invention, the gas turbine generator is used as the power generator, and the air from the sewage treatment tank is supplied as combustion air for the gas turbine generator to achieve deodorization. Various facilities such as a gymnasium, a movie theater, and a sewage treatment facility can be provided in one building.

[Brief description of drawings]

FIG. 1 is a schematic sectional view of an embodiment of the present invention, FIG. 2 is a plan view of an underground portion, and FIG. 3 is a block diagram of a power generation system. 1 ... Building, 2 ... Treatment room, 3 ... Power generation room, 4, 5, 6, 7, 8, 9 ... Wastewater treatment tank, 12 ... Fan, 13 ... Air supply duct, 14 ... Intake duct, 17 ... Gas turbine generator, 18 ... Heat exchanger, 20 ... Chimney, 21 ... Heat storage tank, 22 ... Air conditioner, 23 ... Hot water tank, 30, 31 ... Circulation path, 32 ...... Supply channel, 40 …… Pipeline.

Claims (1)

[Claims] 1. A treatment chamber for isolating a sewage treatment tank provided in an underground portion of a building, a gas turbine generator for supplying electric power to the building, and a chimney for discharging exhaust gas, the treatment chamber being negative. A power generation system characterized in that a supply path is provided, which is adjusted to a pressure and sends air in the processing chamber to the gas turbine generator as air for fuel combustion.