JPH045702Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention provides a system in which a compressor that supplies oxygen-containing gas under pressure is connected to a gas turbine, a combustor is interposed in the air supply path from the compressor to the gas turbine, and the combustor The present invention relates to a supercharger provided with a flow path for supplying fuel.

Conventionally, as shown in FIG. 2, an electric fan 17 for supplying forced cooling air was attached to the gas turbine 2, and the cooling air from the fan 17 was used to cool the turbine casing. However, since the amount of heat carried out of the system by the cooling air after the cooling effect is extremely large, there is a problem that the thermal efficiency of the entire device is drastically reduced.
The structure becomes complicated due to the provision of the fan 17, and since a dedicated power source 18 for the fan 17 is required, the overhead for electrical work increases, and the overall manufacturing cost increases.

The purpose of this invention is to achieve a specified turbine casing cooling.
The purpose is to enable operation without requiring a power source, while maintaining high thermal efficiency of the entire device, and to simultaneously achieve noise prevention and safety improvement of the turbine and compressor.

The characteristic configuration of the present invention is that, in the above-mentioned supercharger, a case is provided in which the compressor and the gas turbine are housed, the combustor is arranged outside the case, the case is lined with a sound absorbing material, and the compressor and the gas turbine are Connecting an air supply path of the compressor that sucks oxygen-containing gas preheated as the turbine is cooled for combustion to the case;
An oxygen-containing gas supply path is provided for supplying oxygen-containing gas for cooling the compressor and gas turbine into the case using the suction force of the compressor, and its functions and effects are as follows.

In other words, by flowing oxygen-containing gas to be supplied to the compressor into the case, the turbine casing is cooled while the gas is effectively used as forced cooling air. By arranging the combustor that generates heat outside the case, the inside of the case is maintained at a sufficiently low temperature and the turbine casing is sufficiently cooled. Therefore, by simply adding a case, it is possible to omit the electric fan for supplying forced cooling air as in conventional configurations, greatly simplifying the overall structure of the device, and reducing the power supply equipment. This made it possible to avoid installation restrictions and increases in manufacturing costs.

In addition, by cooling the turbine casing, the oxygen-containing gas supplied to the compressor is preheated, which increases the supercharging efficiency of the device, so a large amount of heat is dissipated from the turbine casing due to cooling. The amount of heat was effectively recovered within the system, making it possible to significantly improve the thermal efficiency of the entire device.

In addition, the original function of the case, which is lined with sound-absorbing material, is to effectively suppress the external effects of noise generated from compressors and gas turbines, which rotate at high speeds of tens of thousands of revolutions per minute or more. Therefore, it is possible to prevent accidents caused by damage to the compressor or gas turbine during operation, and as a whole, it has been possible to provide a supercharger that is extremely practical.

Next, examples will be shown.

As shown in Fig. 1, a compressor 1 that supplies air under pressure is connected to a gas turbine 2, the compressor 1 and the gas turbine 2 are connected through an air supply path 3, and a flow path 4 with an on-off valve _V1 is connected. A burner type combustor 5 that burns fuel gas and air from the compressor 1 is interposed in the air supply path 3, and a recovery flow path 6 is provided to appropriately supply high-pressure hot air from the gas turbine 2 to the device 7. A supercharger is configured to supply high-pressure hot air as, for example, oxygen-containing gas for combustion, gas for heating, or the like.

A case 8 is provided to house the compressor 1 and the gas turbine 2, and a sound absorbing material 9 such as asbestos material is lined inside the case 8 to prevent noise and improve safety during operation. It is attached.

A supply passage 10 for air intake to the compressor 1 is connected to the case 8 near the interior of the turbine 2, and an upstream end of the intake passage 11 connected to the compressor 1 is connected to the case 8. Case 8
By making the supply air flow into the air, the turbine casing of the turbine 2 is cooled while effectively using the supplied air as forced cooling air, and by preheating the supplied air in conjunction with cooling the turbine casing, The system is configured to effectively recover the amount of heat radiated from the turbine 2 into the system, thereby improving the thermal efficiency of the entire system.

An oil supply path 13 is provided to circulately supply lubricating oil to the bearings 12 of the compressor 1 and the turbine 2, and a pump 14 and an air-cooled oil cooler 15 are interposed in the circulation oil path 13.

An oil cooler 15 is connected to the air merging supply path 16 connected to the air intake path 11 of the compressor 1 so that the cooling air flow path becomes a flow path for the merging supply air to the compressor 1. In this state, the air supplied to the compressor 1 is used more effectively as cooling air for the oil cooler.
The structure is such that the circulating lubricating oil can be forcibly cooled without providing an electric fan for supplying cooling air.

In the figure, V ₂ and V ₃ are flow control valves, and by adjusting these valves, the merging ratio of air from both air supply paths 10 and 16 is set.

Next, another example will be shown.

The oxygen content and composition of the gas supplied to the compressor 1 can be changed as necessary, and these gases are collectively referred to as oxygen-containing gas.

Further, the specific connection points of the oxygen-containing gas supply passage 10 and the intake passage 11 of the compressor 1 to the case 8 may be, for example, the connection ports of the supply passage 10 are distributed near the turbine interior portion of the case 8, etc. , can be changed as appropriate.

Furthermore, the specific shape and structure of case 8, as well as
Various changes and improvements can be made to the material of the sound-absorbing material 9 that is attached to the inside.

Furthermore, the gas turbine 2 and the compressor 1
When using medium/high pressure gas fuel as the fuel for the combustor 5 instead of using an electric motor for starting, etc., the gas pressure of the gas fuel can be used to rotate the air motor, etc. The rotational driving force may be used to start the turbine 2 and the compressor 1. Also, to continuously drive the lubricating oil supply pump 14, instead of using an electric motor or the like, high pressure oxygen from the compressor 1 may be used. The contained gas may be configured to drive an air motor linked to the pump 14, and the above-mentioned starting structure and pump drive structure may be replaced with a lubricating oil cooling structure that utilizes the oxygen-containing gas supplied to the compressor 1. By using them together, you can completely eliminate the need for power supply equipment.

[Brief explanation of the drawing]

FIG. 1 is a flow sheet showing an embodiment of the present invention, and FIG. 2 is a flow sheet of a conventional example. 1...Compressor, 2...Gas turbine,
3...Air supply path, 4...Fuel supply flow path, 5...Combustor, 8...Case, 9...Sound absorbing material, 10...Oxygen-containing gas supply path, 11...Intake path.

Claims (1)

[Scope of utility model registration request] Compressor 1 that supplies oxygen-containing gas under pressure
A supercharger which is interlocked and connected to a gas turbine 2, a combustor 5 is interposed in an air supply path 3 from the compressor 1 to the gas turbine 2, and a flow path 4 for supplying fuel to the combustor 5 is provided. A case 8 is provided in which the compressor 1 and the gas turbine 2 are housed, the combustor 5 is disposed outside the case 8, the case 8 is lined with a sound absorbing material 9, and the compressor 1 and the gas turbine are The air intake passage 11 of the compressor 1, which sucks in preheated oxygen-containing gas for combustion during cooling of the compressor 2, is connected to the case 8, and the suction force of the compressor 1 cools the compressor 1 and the gas turbine 2. The supercharger is provided with an oxygen-containing gas supply path 10 for supplying oxygen-containing gas into the case 8.