JPH0629568B2 - Power generation system - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial field of application> The present invention relates to a power generation system that organically combines sewage treatment and power generation and effectively uses thermal energy generated during power generation.

<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 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 wastewater treatment and power generation, in particular, it eliminates the offensive odor generated from wastewater, and effectively utilizes the surplus energy of power generation for various facilities. It is an object of the present invention to provide a power generation system in which facilities and facilities are provided in the same building.

<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 is provided with a processing chamber which is provided in the underground part of the building so as to isolate the sewage treatment tank, and the inside of which is adjusted to a negative pressure, and the air in the processing chamber is supplied as air for fuel combustion. Gas turbine generator,
It is characterized by including a heat exchanger that obtains hot water from the latent heat of the exhaust gas of the gas turbine generator, and an air conditioner that cools and heats the building by the hot water from the heat exchanger.

<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 maintained at a negative pressure. This negative pressure condition 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. 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, deodorization of a bad odor is performed by introducing the air in the processing chamber 2 from the intake duct 14 to the gas turbine generator 17 and supplying the air 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 it is driven, but since this noise is a high frequency sound wave generated from the high speed rotation of the gas turbine generator 17, it is easily absorbed by the surrounding concrete wall. It doesn't spread outside. Therefore, noise does not reach each facility of the building 9 and no noise trouble 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.
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 processing chamber 2 contains malodorous gases such as hydrogen sulfide, phenol, mercaptan, and ammonia generated from various wastewater 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 and turned into malodor. 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. In the gas turbine generator 17 of the present invention, a jet engine generates high-temperature combustion heat of 800 to 850 ° C., 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. 29 is a three-way valve 3
It is a branch pipe connected to the chimney 20 via 0, and acts so as to guide 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. Here, as the heat exchanger 18, a conventionally known one can be used, but the heat exchanger 18 will be described by taking FIG. 4 as an example. In this heat exchanger 18, a plurality of smoke pipes 33 are inserted into a depressurized steam chamber 32 whose inside is maintained at a depressurized state below atmospheric pressure. The heat exchange pipes 34 and 35 are inserted and configured. Further, the heat transfer water 36 is stored in the reduced pressure steam chamber 32, and when the high-temperature exhaust gas from the gas turbine generator 17 flows into the smoke pipe 33, the heat transfer water 36 absorbs the heat and becomes steam, The exchange tubes 34 and 35 are heated to a predetermined temperature to perform heat exchange. Therefore, the high-temperature exhaust gas becomes a low temperature 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. First, the high temperature water is supplied from the high temperature circuit 30 to the hot water supply tank 2
3 and the heating and cooling 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 22
For example, a heat pump is used, and each air conditioner 38 is driven by hot 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 stored in the pipeline 3
9 applies to floor heating of Building 1. 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.

Various modifications can be made in the present invention. The air in the processing chamber may be sucked by a pump as a means for making the processing chamber negative pressure. Further, in the heat exchanger, only high temperature water may be obtained for cooling and heating. In this case, the heat storage tank is not required and hotter hot water is obtained, so that the thermal efficiency of cooling and heating is improved. Furthermore, the hot water supply tank may be omitted.

<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. In addition, since the surplus energy of the gas turbine generator is used for heating various facilities, it is possible to save heat energy.

[Brief description of drawings]

1 is a schematic sectional view of an embodiment of the present invention, FIG. 2 is a plan view of an underground portion, FIG. 3 is a block diagram of a power generation system, and FIG. 4 is a sectional view of an example of a heat exchanger. 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, 40 ……pipeline.

Claims (1)

[Claims] 1. A treatment chamber which is provided in an underground portion of a building so as to isolate a sewage treatment tank and whose inside is adjusted to a negative pressure,
A gas turbine generator in which air in the processing chamber is supplied as air for fuel combustion, a heat exchanger for obtaining hot water from latent heat of exhaust gas from the gas turbine generator, and heating and cooling of the building by hot water from the heat exchanger. A power generation system, comprising: a cooling and heating device for performing.