JPS63100233A - Power generation system - Google Patents

Abstract

PURPOSE:To deodorize a malodor and use wasted heat efficiently, by installing a heat exchange of hot water in an exhaust gas duct of a gas turbine generator which uses, for its combustion, the air in a treating room for isolating a sewage treatment plant which is made under the ground in the basement of a building, and air- conditioning the building using the hot water. CONSTITUTION:A treating room 2 in which sewage is treated and a generator room 3 in which power is generated are made under the ground in the basement of a building 1 which has some kinds of facilities, for instance, a gymnasium and a movie theater, in an upper floor over the ground. In the treating room 2, a treatment plant which consists of a sand sedimentation tank 4, a aeration tank 5, a precipitation tank 6, a nitrating tank 7, a denitrification tank 8 and a flocculating sedimentation tank 9, is installed. And an outlet air duct and an inlet air duct 14 are installed facing each other in the treating room 2, whose inside pressure is adjustable to negative. The inlet air duct 14 is connected to a supplying duct 32 through which the air in the treating room 2 is transported to a gas turbine generator 17 as air for combustion by a fan 12. Besides, installing a heat exchanger 18 in an exhaust gas duct from the gas turbine generator 17, and getting hot water heated by exhaust gas, then the hot water is supplied to an air-conditioner and used for air-conditioning.

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention provides a power generation system that organically combines sewage treatment and power generation, and also effectively utilizes the thermal energy generated during power generation. Regarding.

<Conventional technology and its problems> Facilities such as gymnasiums, movie theaters, entertainment halls, and general hospitals consume large amounts of electricity, and it is necessary to avoid confusion and danger in the event of a power outage, so it is necessary to install backup or emergency private facilities. Equipped with a power generation device. These facilities are built near residential areas or in downtown areas, and are not meant to be sewage treatment facilities that emit foul odors.

The characteristics are the opposite, and sewage treatment facilities are generally installed on the outskirts of residential areas.

Therefore, the various facilities mentioned above and the sewage treatment facility are constructed in locations far apart, and at present no facility has yet been constructed that organically combines these facilities.

The present invention: This invention organically combines sewage treatment and power generation, and in particular eliminates the harmful effects generated from sewage, and effectively utilizes the surplus energy generated from power generation for various facilities. The object of the present invention is to provide a power generation system in which a facility and a sewage treatment facility can be installed in a building.

In order to achieve the above objectives, this study isolated the sewage treatment tank in the underground part of the building and installed a gas turbine generator driven by 112 foul odors from the sewage treatment tank. It was designed to be supplied. In other words, the power generation system according to this research consists of a treatment chamber that is installed in the underground part of a building to isolate a sewage treatment tank and whose internal pressure is adjusted to negative pressure, and a treatment chamber in which the air inside the treatment chamber is supplied as air for fuel combustion. The system is characterized by being equipped with a gas turbine generator, a heat exchanger that obtains hot water from the latent heat of exhaust gas from the gas turbine generator, and an air-conditioning system that cools and heats a building using the hot water from the heat exchanger.

<Example> Hereinafter, the present invention will be described in more detail 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 the underground portion thereof, and FIG. 3 is a block diagram of the power generation system. Building 1 is built in a residential area or a downtown area, and constitutes various facilities such as a gymnasium, a movie theater, and an entertainment hall. The building 1 consists of an above-ground part and an underground part, and the above-mentioned various facilities are provided in the above-ground part, and the underground part is provided with a treatment room 2 for treating sewage and a power generation room 3 for generating electricity. Treatment room 2 handles human waste discharged from surrounding residential areas and downtown areas.

It processes domestic wastewater to meet environmental standards, and various sewage treatment tanks are installed.

This sewage treatment tank is a sand settling tank4. @Air Tank 5. Sedimentation tank 6, nitrification tank 7. Denitrification tank8. It consists of a coagulation-sedimentation tank 9, and further a flow rate adjustment tank, a deaeration tank, and a disinfection tank (all not shown) are appropriately connected in the middle. The sand settling tank 4 removes foreign substances such as soil and sand 2 paper from the wastewater flowing in from the introduction pipe 10, and the aeration tank 5
Aeration is performed to settle the sludge in a settling tank 6 following the aeration tank 5. The nitrification tank 7 mainly performs oxidation and decomposition of ammonia, and the denitrification tank 8 reduces and removes nitrogen oxides, thereby reducing BOD, COD, and 38 in wastewater and decomposing phosphorus compounds and nitrogen compounds, thereby achieving environmental standard values. The sewage that meets the requirements passes through the coagulation and sedimentation tank 9 and is discharged from the discharge pipe 11 into a river or the like. Incidentally, a series of such sewage treatment tanks are arranged in plural rows in the treatment chamber 2, so that even a large amount of sewage can be handled. The processing chamber 2 is isolated from the above-ground portion 2 power generation chamber and other rooms by a concrete wall and a door, and the interior thereof is maintained at negative pressure. This negative pressure condition is maintained by the fan 12 in this embodiment. That is, the processing chamber 2 has an air supply duct 1.
3 and an intake duct 14 are arranged opposite 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 pressure inside the processing chamber 2 is reduced by the intake duct 14, and outside air flows in from the air supply duct 13, but the amount of discharge and the amount of inflow can be adjusted by the valves 15 and 16. A good negative pressure condition can be obtained. By isolating the processing chamber 2 from other rooms of the building 1 and maintaining the inside of the processing chamber 2 at a negative pressure in this way, the air inside the processing chamber 2 can be prevented from leaking from other parts except the intake duct 4. In addition, even if the door of the treatment room 2 is opened, it is a one-way flow where outside air just flows in, so the bad odor generated from the sewage treatment tank does not leak outside, especially to the various facilities above ground, causing discomfort. Gana (naru)

Like the processing room 2, the power generation room 3 is isolated by a concrete wall, and a generator 17 is installed inside, supplying electricity to various equipment such as lighting fixtures and air conditioners in various facilities installed above ground. It is designed to supply In the present invention, a gas turbine generator is used as the generator 17. This gas turbine generator 17 has a power generation device built into a jet engine that provides driving force for aircraft, ships, etc., and since conventionally known ones can be used, the details thereof will be omitted, but this gas turbine generator 17 80
It burns at a high temperature of 0°C or higher, and this high temperature is used to eliminate bad odors and effectively utilize thermal energy. First, deodorization of bad odors is carried out by guiding the air in the processing chamber 2 through the intake duct 14 to the gas turbine generator 17 and supplying it as fuel combustion air. Further, effective use of thermal energy is achieved by guiding the 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 this noise is a high frequency sound wave generated from the high rotation speed of the gas turbine generator 17, so it is easily absorbed by the surrounding concrete walls. It will not be propagated to the outside. Therefore, the noise does not reach each facility in the building 9, and no noise disturbance occurs.

Next, the power generation system will be explained 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 conditioning system, and 23 is a hot water tank. A gas path 24 for exhaust gas from the gas turbine power generation 4J17 is branched into a first gas path 25 connected to the heat exchanger 18 and a second gas path 26 connected to the chimney 20. After leaving the heat exchanger 18, the line 25 is connected to a second gas line 26. Each gas path 25, 264 is a valve 27
．． 28 is provided to open and close the gas flow path and adjust the flow rate, thereby controlling the gas turbine
The exhaust gas from tfJI 17 is mainly transmitted through the first gas path 25.
It is also possible to directly lead to the chimney 20 from the second gas path 26 and release it into the atmosphere. The gas turbine generator 17 is supplied with fuel such as heavy oil from a fuel tank 19, and air for fuel combustion is supplied from the processing chamber 2. The air in the treatment chamber 2 contains foul-smelling gases such as hydrogen sulfide, phenol, mercapulin, and ammonia generated from various sewage treatment tanks, and is exposed to high temperatures of 800° C. or higher in the gas turbine generator 17. This decomposes them and makes them odorless. As a method to deodorize such malodorous gases,
Conventionally, activated carbon adsorption.

Oxidation-reduction treatment or decomposition by underground bacteria is carried out, but it is not only difficult to operate and expensive to apply to sewage treatment facilities that generate large amounts of foul-smelling gases. However, it was not possible to completely eliminate odor. In addition, the above-mentioned malodorous gases have high temperature resistance and cannot be thermally decomposed by the combustion heat generated by diesel engines and the like.

In the present invention, the gas turbine generator 17 generates high-temperature combustion heat of SOO to 850° C. from a jet engine, and because it is exposed to this high temperature, malodorous gases are easily decomposed and rendered odorless. In addition, a large amount of air is required to drive a jet engine, but since all of this air is supplied from the treatment chamber 2, even if a large amount of foul-smelling gas is generated from the sewage treatment tank, it can be completely odor-free. ing. A branch pipe 29 is connected to the chimney 20 via a three-way valve 30, and acts to directly guide air from the processing chamber 2 to the chimney 20. This branch pipe 29 is used when the air in the processing chamber 2 does not contain a large amount of foul-smelling gas and does not cause any foul odor to the surroundings, and discharges the air directly from the chimney 20 to the gas turbine generator 17. No air supply. This prevents the gas turbine generator 17 from being damaged by foul-smelling gases, making it possible to prolong its life.

The heat exchanger 18 receives exhaust gas from the gas turbine generator 17, and heats water using the latent heat of the exhaust gas. This heating is carried out in two stages to obtain hot water at a temperature of about 80-85°C and thermal storage water at a lower temperature than the hot water (about 55-65°C). In the figure, 30 is a high-temperature circulation path through which high-temperature water circulates, which includes the high-temperature section 18a of the heat exchanger 18, the hot water tank 23, and the air-conditioning device 2.
Connect 2 and 1 so that water circulates. Further, 31 is a heat storage circulation path through which heat storage water circulates, and is connected between the M heat section 18b of the heat exchanger 18 and the heat storage tank 21 so that the heat storage water circulates. Although a conventionally known heat exchanger 18 can be used here, FIG. 4 will be described as an example. This heat exchange N
A plurality of smoke pipes 33 are inserted into a reduced pressure steam chamber 32 whose interior is maintained in a reduced pressure state below atmospheric pressure, and a heat exchanger 18 is connected to each circulation path 30 and 31 in the upper part of the reduced pressure steam chamber 32. The tubes 34 and 35 are inserted therethrough.

Further, heat medium water 36 is stored in the reduced pressure steam chamber 32, and when high temperature exhaust gas from the gas turbine generator 17 flows into the smoke pipe 33, the heat medium water 36 absorbs heat and turns into steam. The exchange tubes 34 and 35 are heated to a predetermined temperature to perform heat exchange. Therefore, the high-temperature exhaust gas becomes low temperature and is discharged from the chimney 20, and the latent heat of the exhaust gas is converted into thermal energy of water, and the thermal energy is effectively utilized as described below. First, high-temperature water is guided from the high-temperature circulation path 30 to the hot water tank 23 and the air-conditioning device 22 . Hot water tank 23 is in building 1
Plumbed water and shower facilities.

Supply high-drought water to baths, etc. On the other hand, each hall 37 is formed in the building 1 according to the purpose of use.
7 is provided with an air conditioner 38 for heating and cooling. The heating and cooling device 22 may be an example or a heat pump, and drive each air conditioner 38 with high-temperature water. Therefore, since hot water supply, cooling and heating are performed using the hot water from the heat exchanger 18, a power source is not required for these drives, 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. For this reason, a plurality of pipelines 40 through which heat storage water flows are installed under the floor of the building 1, and when heat storage water is supplied to the pipelines 40 by a pump (not shown), etc., the entire floor becomes hot. The building is heated by the floor heating system. As a result, the Wi heat of the exhaust gas is used for floor heating, making it possible to use thermal energy effectively. Unlike air-conditioned heating, which forces warm air into the room, such floor heating does not generate noise due to airflow. Therefore, since heating can be performed without noise disturbance, this is particularly effective when the building 1 is a facility where noise is a concern, such as a concert hall or conference hall.

Furthermore, since the yield of thermal storage water is higher than that of high-temperature water, it is also possible to increase the amount of water stored in the thermal storage tank 21 and supply hot water to a hot water pool or the like.

Note that various modifications can be made to the present invention.

As a means for creating a negative pressure in the processing chamber, air in the processing chamber may be sucked out by a pump. Alternatively, the heat exchanger may obtain only high-drought water for heating and cooling. In this case, a heat storage tank is not required and hot water at a higher temperature can be obtained, improving the thermal efficiency of air conditioning. Furthermore, the hot water tank may be omitted.

<Effects of the Invention> As described above, according to the present invention, a gas turbine generator is used as a power generation device, and air from a sewage treatment tank is supplied as combustion air for the gas turbine generator to make it odorless. Therefore, various facilities such as gymnasiums and movie theaters and sewage treatment facilities can be installed within the building. Furthermore, since the surplus energy of the gas turbine generator is used for heating various facilities, it is also possible to save thermal energy.

[Brief explanation of the drawing]

Fig. 1 is a schematic sectional view of one embodiment of the present invention, Fig. 2 is a plan view of the underground part, Fig. 3 is a professional diagram of the power generation system, and Fig. 4 is a schematic cross-sectional view of an embodiment of the present invention.
The figure is a sectional view of an example of a heat exchanger. 1 Building, 2...processing room, 3 Power generation room, 4.5,6,
7, 8, 9 ・Sewage treatment tank, 12 , fan, 13・
- Air supply duct, 14 Air intake duct, 17 - Gas turbine generator, 18 Heat exchanger, 20... Chimney, 21 - Heat storage tank, 22 - Air conditioning device, 23 Hot water tank,

Claims (1)

[Claims] A treatment chamber installed in the basement of a building to isolate the sewage treatment tank and whose interior is regulated to negative pressure, a gas turbine generator to which the air inside the treatment chamber is supplied as air for fuel combustion, and a gas turbine. A power generation system comprising: a heat exchanger that obtains hot water from the latent heat of exhaust gas from a generator; and an air-conditioning device that cools and heats the building using the hot water from the heat exchanger.