KR100222234B1 - Turbo steam generator - Google Patents

Abstract

The present invention relates to a steam generator which has a convection heat transfer type heat exchange process by a high-speed fluid flow and which recovers the expansion energy of the combustion gas by driving the turbine, thereby reducing the size and weight of the steam generator. A combustion apparatus for combusting compressed air and fuel, a heat exchange means for generating steam by heat exchange of the high-pressure combustion gas heat in a convective heat transfer manner, a turbine driven by the expansion of the high-temperature high-pressure combustion gas, And preheating means for preheating the temperature of the water supplied to the steam generating heat exchanging means by recovering the exhaust gas heat of the turbine.

Description

Turbo steam generator

The present invention is to provide a turbo steam generator which is compact and light in weight by having a convection heat transfer type heat exchange process by a high speed fluid flow and recovering the expansion energy of the combustion gas by driving the turbine.

The steam generator includes a blower for supplying air for combustion, a combustor for burning fuel, and a heat exchanger for recovering combustion heat in a radiant heat transfer manner.

The blower supplies the air required for combustion to the atmospheric pressure level. The combustor combusts the fuel by using the combustion air supplied from the blower. The heat exchanger generates heat by exchanging the heat of the combustion in the combustor with the heat exchange method by radiant heat transfer.

Such a steam generator suffers from the problem that the steam is burned under the atmospheric pressure and the heat transfer uses the radiant heat transfer system, so that the apparatus is bulky and heavy.

SUMMARY OF THE INVENTION In view of the above, it is an object of the present invention to provide a steam generator which is compact and light in weight. The present invention is directed to a steam generator which comprises: air compression means for raising the pressure of combustion air; Pressure combustion gas which has passed through the steam generating heat exchanging means and which is driven by the expansion of the high-temperature high-pressure combustion gas, And a preheating means for preheating the temperature of the water supplied to the steam generating heat exchanging means by recovering the exhaust gas heat of the turbine.

In the present invention, air required for combustion is compressed at a high pressure in the air compression means, and the compressed air is mixed and combusted with the combustion fuel (LNG) in the combustion means to increase the combustion efficiency. The high- The heat is recovered in the steam generating heat exchanging means by using the convection heat transfer system to generate steam and the turbo is driven by the expansion of the combustion gas at high temperature and high pressure to drive the air compression means connected with the shaft coaxially with the turbine shaft, The exhaust gas heat is supplied to the preheating means to raise the temperature of the water supplied to the steam generating heat exchanging means so that the steam generating device can be reduced in size and weight.

FIG. 1 is a block diagram of a turbo steam generator of the present invention. FIG.

FIG. 2 is a schematic view of the heat exchanger of the present invention. FIG.

DESCRIPTION OF THE REFERENCE NUMERALS

1: air compressor 2: high-pressure combustor

3: Steam generating heat exchanger 4: Turbine

5: preheater 11: steam generating first heat exchanger inner cylinder

12: Steam generating second heat exchanger inner tube 13: First preheater inner tube

14, 15: steam generating heat exchanger spiral groove 16: steam generating first heat exchanger outer tube

17: steam generating second heat exchanger outer tube 18: first preheater outer tube

19: second preheater inner tube 20: second preheater outer tube

The present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a structural view of the steam generator of the present invention

A high-pressure combustor 2 for mixing the air compressed in the air compressor 1 with a combustion fuel such as LNG to burn the high-pressure combustor 2, a high-pressure combustor 2 for combustion in the high- A steam generating heat exchanger (3) for recovering the heat of high temperature and high pressure combustion gas generated by the combustion of fuel by a convective heat transfer method to generate steam, and an exhaust gas heat exchanger And a preheater 5 for preheating the temperature of the water supplied to the steam generation heat exchanger 3 by recovering the exhaust gas heat of the turbine 4. [

FIG. 2 is a schematic view of a heat exchanger according to the present invention. As shown in FIG. 2, a steam generating first heat exchanger inner cylinder 11 having a spiral groove 14 through which exhaust gas burned in the high- A steam generating first heat exchanger outer cylinder 16 that surrounds the inner cylinder 11 and allows the exhaust gas passed into the inner cylinder 11 to pass to the outside and a steam generating first heat exchanger outer cylinder 16 A steam generating second heat exchanger inner cylinder 12 formed with a helical groove 15 through which water flows outwardly and an exhaust gas passage 12 surrounding the inner cylinder 12 and passing through the inner cylinder 12 And the exhaust gas passing through the turbine 14 at a certain distance from the steam generating second heat exchanger outer tube 17 and flowing inwardly flows through the turbine 4 In the first preheater where the water supplied for preheating flows outside A first pre-heater outer tube 18 which surrounds the inner tube 13 at a predetermined interval and a first pre-heater outer tube 18 which are spaced apart from the first pre- A second pre-heater inner cylinder 19 through which turbo exhaust gas flows and water supplied for preheating flows outward, and a second pre-heater outer cylinder 20 which is an outermost cylinder that surrounds the second pre-heater inner cylinder 19 at regular intervals .

Here, the helical grooves 14 and 15 are formed in a spiral shape so as to allow water to flow outside the inner tube 11 of the steam generating first heat exchanger and the inner tube 12 of the steam generating second heat exchanger.

In the present invention having such a constitution, the combustion air is compressed in the air compressor 1 and applied to the high-pressure combustor 2, so that the high-pressure combustor 2 mixes and burns the high-pressure compressed air and the LNG fuel.

The high-temperature and high-pressure combustion gas burned in the high-pressure combustor 2 passes through the steam generating first heat exchanger inner cylinder 11, the outer cylinder 16, the second heat exchanger inner cylinder 12 and the outer cylinder 17 1, the steam generating heat exchanger 3 shown in FIG. 1 is provided with a first pre-heater inner cylinder 13, an outer cylinder 18 and a second pre- The preheated water is supplied through the inner cylinder 19 and the outer cylinder 20.

The high-temperature and high-pressure combustion gas burned in the high-pressure combustor 2 passes through the inside of the inner tube 11 of the steam generating first heat exchanger 11, passes through the interior of the steam generating second heat exchanger inner cylinder 12, Then passes through the interior of the first pre-heater inner cylinder 13, passes through the second pre-heater inner cylinder 19, and is discharged.

That is, the combustion gas is supplied to the steam generating heat exchanger 3 and the pre- B C D passes through the inside of the steam generating first heat exchanger inner cylinder 11, the steam generating second heat exchanger inner cylinder 12, the first pre-heater inner cylinder 13, and the second pre-heater inner cylinder 19, respectively.

The water supplied to the steam generating heat exchanger 3 in the preheater 5 shown in FIG. 1 flows through the interior of the second pre-heater outer tube 20 and the first pre-heater outer tube 18 and is preheated, And flows through the spiral groove 14 of the inner tube 11 of the steam generating first heat exchanger 11 to be heat-exchanged and discharged as steam.

That is, in the preheater 5 and the steam generating heat exchanger 3, F G H between the second pre-heater inner cylinder 19 and the outer cylinder 20, between the first pre-heater outer cylinder 18 and the inner cylinder 13, between the spiral groove 15 of the steam generating second heat exchanger inner cylinder 12, And flows through the spiral groove 14 of the inner tube 11 of the first heat exchanger.

Here, the temperature of the combustion gas is the highest in the inner tube 11 of the steam generating first heat exchanger 11, the second highest in the inner tube 12 of the steam generating second heat exchanger, and the highest in the inner tube 19 of the second pre- The lowest.

The water supplied from the pre-heater 5 shown in FIG. 1 is supplied to the first pre-heater inner cylinder 19 and the outer cylinder 20, between the first pre-heater inner cylinder 13 and the outer cylinder 18 as shown in FIG. Exchanged with the combustion gas to raise the temperature and the preheated water is heat-exchanged on the spiral groove 15 of the inner heat exchanger 12 of the second heat exchanger and thereafter flows into the spiral groove 14 of the inner heat exchanger 11 ), Is converted into steam, and then discharged.

The water supplied from the preheater 5 is preheated in the second preheater inner cylinder 19 and the first preheater inner cylinder 13 in which the combustion gas flowing through the turbine 4 flows and then the steam generated in the steam generating second heat exchanger inner cylinder 12 And then converted into steam in the inner tube 11 of the steam generating first heat exchanger.

The high-temperature and high-pressure combustion gas that has passed through the steam generating heat exchanger 3 rotates the turbine 4 and the rotational power of the turbine 4 is used to drive the air compressor 1. Therefore, when the steam generator is first driven It can be driven by its own power.

The exhaust gas that has turned the turbine 4 is still used to preheat the water in the preheater 5 since the heat remains.

The preheater 5 makes it possible to easily convert the steam from the steam generating heat exchanger 3 into steam by preheating the temperature of the water supplied to the steam generating heat exchanger 3 by using the heat of the exhaust gas.

The present invention relates to an air compressor, a high-pressure combustor, a high-pressure multi-coaxial spiral steam generating heat exchanger, a turbine, a preheater, Type heat exchanger, and the preheater for collecting the expansion energy of the combustion gas by the drive of the turbine and preheating the supplied water has an integral structure with the steam generation heat exchanger, so that compared with other types of steam generators having the same heat output capacity, The weight of the steam generating device per output is reduced to 1/5 to 1/7 and the volume of the steam generating device is reduced to 1/10 to 1/15.

Claims (1)

A high-pressure combustor (2) for mixing the air compressed in the air compressor (1) with the combustion fuel to burn the high-pressure combustor (2); and a burner A steam generating first heat exchanger inner tube 11 formed with a spiral groove 14 through which exhaust gas flows inward and water flows in the outer side, and an exhaust gas passage 11 surrounding the inner cylinder 11 and passing through the inner cylinder 11 The steam generating first heat exchanger outer cylinder 16 for allowing the steam to pass to the outside of the steam generating first heat exchanger 16 and the steam generating agent 16 formed at a certain interval from the steam generating first heat exchanger outer cylinder 16, And a steam generating second heat exchanger outer tube 17 which surrounds the inner cylinder 12 and is supplied to the turbine 4 through the exhaust gas passing through the inner cylinder 12 and passing through the outer side of the second heat exchanger inner cylinder 12 Convection heat transfer by high-speed fluid flow A turbine (4) rotating by the expansion of the high temperature and high pressure combustion gas passing through the steam generating heat exchanger (3) and driving the air compressor (1); and a turbine A first pre-heater inner cylinder 13 through which the exhaust gas of the first heat exchanger 4 flows inward and which is formed at a certain distance from the steam generating second heat exchanger outer cylinder 17 and to which water supplied for preheating flows, A first pre-heater outer tube 18 which surrounds the first pre-heater outer tube 18 at a certain interval from the first pre-heater outer tube 18; A second preheater inner cylinder 19 through which the supplied water flows and a second preheater outer cylinder 20 which is an outermost cylinder for enclosing the second preheater inner cylinder 19 at regular intervals and is integrally formed with the steam generation heat exchanger 3 And a preheater 5 formed thereon Characterized in that the steam generator is a steam generator.