JPH0510106A - Cogeneration plant device - Google Patents

Abstract

PURPOSE:To enable starting of a cogeneration power plant device even under a power outage by providing the device with a power generator which is driven by a small-sized motor, and a starting small-sized steam turbine which is driven by steam generated by means of an exhaust gas boiler. CONSTITUTION:When a device is started, air is sent to a heat recovery boiler 1 by means of a small-sized blower 2. At the starting time of air sending, ignition is carried out by a burner 3, and then steam is generated by the heat recovery boiler 1. The generated steam is sent to a small-sized steam turbine 6 through valves 8, 9 which are operated on requirement. As a result, the small- sized steam turbine 6 is rotated, and thereby a gas turbine 4 and a power generator 7 are started rotating through a reduction gear 5. When the rotational speed reaches a preset value, the gas turbine 4 is under a self-sustained condition. Starting of the cogeneration plant device is completed. The device can be started even under a power outage.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a cogene plant device,
Specifically, it relates to the activation device.

[0002]

2. Description of the Related Art FIG. 3 is a schematic configuration diagram of a conventional Cogene plant apparatus. 103 is an exhaust heat recovery boiler, 107 is a generator, 110 is a power source for driving a generator 107, an engine, Internal combustion engine such as G / T (gas turbine),
Reference numeral 113 is a starting device that is an external machine for starting the engine, the retirement engine 110 such as a G / T, and the like.

Conventionally, as the starting device 113, an AC motor, a DC motor, a small diesel engine, a small gasoline engine, a small air turbomachine, etc. have been used.

[0004]

The above-mentioned conventional starting device for the cogeneration plant device has the following problems to be solved.

That is, when an AC motor is used, there is a problem in that it cannot start when all the power supplies are cut off, a separate motor control device is required, and a speed increasing gear is required.

When a DC motor is used, it goes without saying that a large-capacity DC motor must be used, a large-capacity battery is required, and a motor control device is additionally required. There was a problem of requiring a ring mechanism.

Further, when a small diesel engine or a small gasoline engine is used, it is difficult to match the object unless it is a large cogene plant device, and therefore it is unsuitable for a small cogene plant device and requires constant maintenance. There is a problem in that it requires the speed increasing gear and further needs the speed increasing gear.

Further, when a small air turbo machine is used, there is a problem that air needs to be stored, a special coupling mechanism is required, and the cost is high.

An object of the present invention is to provide a cogenerator plant apparatus that solves the above problems by using a steam turbine that utilizes steam in the system.

[0010]

As a means for solving the above problems, the present invention provides a small prime mover driven by fuel, a generator driven by the small prime mover, and steam generated by using combustion exhaust gas of the small prime mover as a heat source. An exhaust gas boiler to be generated and a cogenerator plant apparatus comprising a small steam turbine for start-up, which is connected to the small prime mover and is driven by steam generated in the exhaust gas boiler. Is.

[0011]

Since the present invention is constructed as described above, it has the following actions.

That is, a small steam turbine for start-up driven by the steam generated by the exhaust gas boiler is attached to a cogenerator plant apparatus including a small prime mover, a generator, an exhaust gas boiler, etc., and this is connected to the small prime mover. Therefore, the small prime mover can be started by the steam generated by the exhaust gas boiler in the own system.

That is, the activation does not require an AC motor, a DC motor, a small diesel engine, a small gasoline engine, a small air turbomachine, etc., unlike the conventional case.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described with reference to FIG.
FIG. 1 is a schematic configuration diagram of a cogeneration plant apparatus according to the present embodiment. In the figure, 1 is an exhaust heat recovery boiler that generates steam by exhaust gas of a gas turbine 4 which is a small prime mover,
Reference numeral 2 is a small blower attached to the exhaust heat recovery boiler 1, 3 is a burner of the exhaust heat recovery boiler 1, 4 is a gas turbine used as a small prime mover, 5 is a rotation of the gas turbine 4 rotating at high speed, and , A reducer for transmitting high torque to the generator 7, and 6 for the exhaust heat recovery boiler 1 when the device is started.
A small steam turbine that is supplied with more steam to rotate and starts the gas turbine 4 and the generator 7 via the speed reducer 5, 7 is a generator driven by the gas turbine 4 via the speed reducer 5, Reference numeral 9 is a valve provided for controlling the steam flow in a steam pipe communicating from the exhaust heat recovery boiler 1 to the small steam turbine 6.

Next, the operation of the above configuration will be described. At the time of starting, first, air is sent to the exhaust heat recovery boiler 1 by the small blower 2. When air supply starts, the burner 3 ignites and the exhaust heat recovery boiler 1 generates steam. The generated steam is sent to the small steam turbine 6 through the valves 8 and 9 which are operated as required. As a result, the small steam turbine 6 rotates, which causes the gas turbine 4 and the generator 7 via the speed reducer 5.
Starts to rotate. When the speed set in advance is reached, the gas turbine 4 becomes self-sustaining, and the start of the cogene plant device is completed. Next, the small blower 2 is rotated at a constant speed.

Next, a second embodiment of the present invention will be described with reference to FIG. The components having the same functions as those in the first embodiment are designated by the same reference numerals, and the description will be omitted.

FIG. 2 is a schematic configuration diagram of a cogenerator plant apparatus using a diesel engine as a small prime mover. In the figure, 4a is a diesel engine connected so that exhaust gas can be supplied to the exhaust heat recovery boiler 1. Has a generator 7 driven by it and the diesel engine 4a on the other
And a small steam turbine 6 for starting the generator 7 is connected. A steam pipe similar to that of the first embodiment is piped from the exhaust heat recovery boiler 1 to the small steam turbine 6, but is shown by a single curved arrow to avoid redundancy. is there. The operation is the same as that of the first embodiment except that the gas turbine 4 having the speed reducer 5 of the first embodiment is replaced by the diesel engine 4a in this embodiment.

As described above, according to the first and second embodiments,
When a small steam turbine 6 is driven by using steam generated by the exhaust heat recovery boiler 1 installed in the cogene plant apparatus to start the apparatus by this power, conventionally, when an AC motor or a DC motor is used As described above, there is an advantage that a malfunction such as being unable to start due to a power failure does not occur. Further, there is an advantage that a large capacity battery is not required. Further, there is an advantage that no special coupling mechanism is required.

Further, there is an advantage that no special maintenance is required as in the case of using a conventional small diesel engine or small gasoline engine. Further, there is an advantage that a speed-increasing gear is not required and the cogenerator device can be sufficiently applied even if it is small.

Further, there is an advantage that air is not required to be stored as in the case of using a small air turbo machine.

Further, unlike a reciprocating engine and the like, the steam turbine has an advantage that it has almost no reciprocating part, a fine linkage part and other so-called mechanical moving parts, and has a long production history and is extremely reliable. As for the control method, for example, an internal combustion engine requires two methods of fuel control and combustion-supporting agent (air, oxygen, etc.) control.
The steam turbine has an advantage that the control method is simple because only the unified control of steam is sufficient.

Although there are some examples of using steam for starting the apparatus among general apparatuses, all of them require steam for starting to the outside, and a boiler and other equipment for generating steam are separately required. In terms of necessity, it is completely different from the first and second embodiments.

[0023]

Since the present invention is constructed as described above, it has the following effects. (1) Since the steam turbine in the self-device is used to start the cogeneration plant device, the control system is simplified and the cost is reduced. (2) The device can be started even during a power failure. (3) Easy maintenance and high reliability. (4) A large-capacity battery or the like is not required unlike the case of using a motor. (5) No special coupling mechanism is required. (6) There is no need to store air as in the case of using an air turbo or the like. (7) If the steam is sufficient, it can be used for energy recovery.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram of a cogeneration plant apparatus according to a first embodiment of the present invention.

FIG. 2 is a schematic configuration diagram of a cogeneration plant apparatus according to a second embodiment of the present invention.

FIG. 3 is a schematic configuration diagram of a conventional cogene plant device.

[Explanation of symbols]

 1 Exhaust Heat Recovery Boiler 2 Small Blower 3 Burner 4 Gas Turbine 4a Diesel Engine 5 Reducer 6 Small Steam Turbine 7 Generator 8,9 Valve

Claims (1)

Claim: What is claimed is: 1. A small prime mover driven by fuel, a generator driven by the small prime mover, an exhaust gas boiler that generates steam by using combustion exhaust gas of the small prime mover as a heat source, and the small size generator. A cogenerator plant apparatus comprising: a small steam turbine for start-up, which is connected to a prime mover and driven by steam generated in the exhaust gas boiler.