KR100858784B1 - Apparatus and method for ship propulsion - Google Patents

Abstract

An apparatus and method of propelling a ship is provided to increase propulsion efficiency by reheating steam discharged from a steam turbine in a LNG carrier and preheating water supplied to a main boiler using steam fed from the steam turbine. An apparatus for propelling a ship is intended to drive steam turbines by generating steam in a main boiler and sequentially feeding the steam through a steam supply line to a high-pressure steam turbine(11) and a low-pressure steam turbine(13). The apparatus includes a middle-pressure steam turbine(15) which is installed between the high-pressure steam turbine and the low-pressure steam turbine. A re-heater(3) is additionally installed to the main boiler. A steam recovery line(L21) for reheating extends from the rear end of the high-pressure steam turbine to the front end of the re-heater. A steam supply line(L22) for reheating extends from the rear end of the re-heater to the front end of the middle-pressure steam turbine. An additional line extends from at least one of the high-pressure steam turbine, the low-pressure steam turbine, the middle-pressure steam turbine, the steam recovery line, and the steam supply line to a steam using device, and provides steam to the steam using device.

Description

Ship propulsion system and method {APPARATUS AND METHOD FOR SHIP PROPULSION}

1 is a schematic diagram of a steam turbine propulsion system according to a first embodiment of the present invention.

2 is a schematic diagram of a steam turbine propulsion system according to a second embodiment of the present invention.

3 is a schematic diagram of a steam turbine propulsion system according to a third embodiment of the present invention.

4 is a schematic diagram of a steam turbine propulsion system according to a fourth embodiment of the present invention.

5 is a schematic diagram of a steam turbine propulsion system according to a fifth embodiment of the present invention.

6 is a schematic diagram of a steam turbine propulsion system according to a sixth embodiment of the present invention.

7 is a schematic diagram of a steam turbine propulsion system according to a seventh embodiment of the present invention.

8 is a schematic diagram of a steam turbine propulsion system according to an eighth embodiment of the present invention.

9 is a schematic diagram of a steam turbine propulsion system according to a ninth embodiment of the present invention.

10 is a schematic diagram of a steam turbine propulsion system according to a tenth embodiment of the present invention.

11 is a schematic diagram of a steam turbine propulsion system according to an eleventh embodiment of the present invention.

12 is a schematic diagram of a steam turbine propulsion system according to a twelfth embodiment of the present invention.

13 is a schematic diagram of a steam turbine propulsion system according to a thirteenth embodiment of the present invention.

14 is a schematic diagram of a steam turbine propulsion system according to a fourteenth embodiment of the present invention.

15 is a schematic diagram of a steam turbine propulsion system according to a fifteenth embodiment of the present invention.

16 is a schematic diagram of a steam turbine propulsion system according to a sixteenth embodiment of the present invention.

17 is a diagram illustrating a heat cycle of a conventional steam turbine propulsion system and a steam turbine propulsion system according to the present invention.

<Description of Signs of Major Parts of Drawings>

1: main boiler 3: Richter

11 high pressure steam turbine 13 low pressure steam turbine

15: medium pressure steam turbine L1: steam supply line

L21: Reheat steam recovery line L22: Reheat steam supply line

The present invention relates to a propulsion system and method of a ship, and more particularly, by reheating and using steam discharged from a steam turbine in an LNG carrier and simultaneously preheating the water supplied to the main boiler by adding steam from the steam turbine, It relates to a steam turbine propulsion system and method configured to increase the.

In general, natural gas is made in the form of liquefied natural gas (Liquefied Natural Gas, hereinafter referred to as LNG) at the production site, and then transported to a destination by an LNG carrier over a long distance.

Since the liquefaction temperature of natural gas is a cryogenic temperature of -163 ° C at atmospheric pressure, LNG is evaporated even if the temperature is only slightly higher than -163 ° C. Although LNG storage tanks of LNG carriers are insulated, external heat is continuously transferred to LNG, so LNG is continuously vaporized in LNG storage tanks while LNG is being transported by LNG carriers. Boil-Off Gas is generated inside.

Therefore, LNG carriers used a steam turbine propulsion system to collect the boil-off gas and burn it in the main boiler to drive the steam turbine to treat the boil-off gas generated in the LNG storage tank. However, the steam turbine propulsion system has the advantages of low cost of maintenance, low vibration, low noise, low cost of lubricants in addition to the treatment of boil-off gas, but the efficiency of diesel engine propulsion system, etc. There is a low problem compared to other systems.

Accordingly, the present invention is to solve the problems of the prior art, the steam turbine propulsion system and method configured to increase the efficiency by re-heating and using the steam discharged from the steam turbine in the LNG carrier at the same time to increase the efficiency To provide that purpose.

In order to achieve the above object, the steam turbine propulsion system of the present invention, the steam turbine propulsion system for generating the steam in the main boiler and sequentially supplied to the high pressure steam turbine and the low pressure steam turbine through the steam supply line to drive the steam turbine A medium pressure steam turbine is installed between the high pressure steam turbine and the low pressure steam turbine. Richter further installed in the main boiler; A steam recovery line for reheating connected from the rear end of the high pressure steam turbine to the front end of the Richter; A reheat steam supply line connected from a rear end of the richter to a front end of the medium pressure steam turbine; Is connected to a steam-using device from at least one of the high pressure steam turbine, the low pressure steam turbine, the medium pressure steam turbine, the reheat steam recovery line, and the steam supply line between the low pressure steam turbine and the medium pressure steam turbine. It characterized in that it comprises a additional line for extracting steam to the steam using device.

In addition, the steam turbine propulsion method of the present invention is a steam turbine propulsion method for driving the steam turbine by generating steam in the main boiler and sequentially supplying the high pressure steam turbine and the low pressure steam turbine through a steam supply line. An intermediate pressure steam turbine is installed between the low pressure steam turbine and the high pressure steam turbine. The steam after driving the high pressure steam turbine is removed without being directly sent to the low pressure steam turbine, reheated, and then sent to the intermediate pressure steam turbine. The steam turbine for reheat is recovered after driving the steam turbine and then driving the low pressure steam turbine, and recovering steam after the high pressure steam turbine, the low pressure steam turbine, the medium pressure steam turbine, and the high pressure steam turbine. A line and the steam supply between the low pressure steam turbine and the medium pressure steam turbine From at least one of which it is characterized in that additionally the steam to the steam using equipment.

Hereinafter, exemplary embodiments of the present invention will be described with reference to the accompanying drawings. In the following embodiments, the same components are described with the same reference numerals.

<First Embodiment>

1 is a schematic diagram of a steam turbine propulsion system according to a first embodiment of the present invention. As shown, the steam turbine propulsion system according to the present invention generates steam in the main boiler (1) to supply to the high pressure steam turbine 11 and the low pressure steam turbine 13 in turn through the steam supply line (L1) It is to drive the steam turbine (11, 13).

The steam turbine propulsion system of the present invention includes a reheater (3), a medium pressure steam turbine (15), a reheat steam recovery line (L21), and a reheat steam supply line (L22). It includes more.

Richter 3 is additionally installed inside or outside the main boiler 1. The main boiler 1 is supplied with boil-off gas or heavy oil as fuel or at the same time with boil-off gas and heavy oil.

The intermediate pressure steam turbine 15 is installed between the high pressure steam turbine 11 and the low pressure steam turbine 13. Rotating shafts of the high pressure steam turbine 11 and the low pressure steam turbine 13 are connected to the reduction gear for propulsion although not shown. It is preferable that the intermediate pressure steam turbine 15 is connected to the propulsion reduction gear coaxially with the rotating shaft of the high pressure steam turbine 11.

The reheat steam recovery line L21 is connected from the rear end of the high pressure steam turbine 11 to the front end of the rich heater 3.

The reheat steam supply line L22 is connected from the rear end of the rich heater 3 to the front end of the medium pressure steam turbine 15.

The steam propulsion system of the present invention configured as described above extracts steam from the high pressure steam turbine 11, reheats it in the Richter 3, and then sends the medium pressure steam turbine 15 to drive the medium pressure steam turbine 15. Since the low pressure steam turbine 13 is driven, as shown in FIG. 17, the overall propulsion efficiency is increased as compared with the conventional steam propulsion system.

In addition, although not shown, a propeller is connected to the rear end of the reduction gear for propulsion.

The main condenser 31 is connected to the rear end of the low pressure steam turbine 13 by a main condensate steam recovery line L3, and the main condensate recovery line L4 is connected to the rear end of the main condenser 31. ), The main water feed pump 41 is provided in the middle of the main condensate recovery line L4. As a result, the steam after driving the low pressure steam turbine 13 is condensed and recovered to the main boiler 1. The condensate return line can also be called a feed line in the sense of supplying water to the main boiler.

When the main water feed pump 41 is driven by a steam turbine, the pump driving steam supply line L11 is branched in the middle of the steam supply line L1 to supply steam to the main water pump steam turbine 43. Supply. The steam turbine 43 for the main feed pump is connected to the main feed pump 41 to drive the main feed pump 41. If the main feed pump 41 is driven by an electric motor, the pump driving steam supply line L11 is not necessary.

In addition, a part of steam generated in the main boiler 1 may be used to drive the steam turbine 51 for the turbogenerator. To this end, a turbo generator steam supply line L12 for supplying steam to the turbo generator steam turbine 51 may be branched in the middle of the steam supply line L1. In this case, the steam recovery line L31 for subcondensation is connected to the front end of the main condenser 31 at the rear end of the turbo generator steam turbine 51.

In the drawings, the steam turbine 43 for the main feed water pump and the steam generator 51 for the turbogener are shown as enclosed in dotted lines because they may be applied or deleted as necessary in the system according to the present embodiment. The driving steam supply line L11, the turbo generator steam supply line L12, and the sub condensation steam recovery line L31 are also shown by dotted lines.

On the other hand, one low-pressure water supply heater 61 is provided in the middle of the main condensate water recovery line L4 at the front end of the main water feed pump 41, and the main condensate water recovery line L4 at the rear end of the main water feed pump 41 is provided. Three high pressure water heaters, namely, the first, second and third high pressure water heaters 63, 64 and 65 are provided on the way.

The low pressure water heater 61 is connected to the low pressure steam turbine 13 by the low pressure water heater bleeding line L51, and the first high pressure water heater 63 is connected to the bleed line L53 for the first high pressure water heater. It is connected to the intermediate pressure steam turbine 15, the second high pressure water heater 64 is connected to the reheat steam recovery line (L21) by the second high pressure water supply bleeding line (L54), and the third The high pressure water heater 65 is connected to the high pressure steam turbine 11 by a bleed line L55 for the third high pressure water heater. Accordingly, the low pressure water heater bleeding line L51 extracts steam from the low pressure steam turbine 13 to the low pressure water heater 61, and the first high pressure water heater bleeding line L53 is the medium pressure steam turbine 15. Steam is added to the first high pressure water heater (63), and the second high pressure water heater bleeding line (L54) is further steamed from the reheat steam recovery line (L21) to the second high pressure water heater (64). The third high pressure water heater bleeding line L55 extracts steam from the high pressure steam turbine 11 to the third high pressure water heater 65. The condensed water condensed in the main condenser 31 is preheated by heat exchange with steam extracted from the feed water heaters 61, 63, 64, and 65, and then returned to the main boiler 1.

In addition, an economizer 67 is provided in the exhaust gas pipe of the main boiler 1. Water supplied through the water heaters 61, 63, 64, 65 is supplied to the main boiler 1 through the economizer 67. In the economizer 67, the water supply is preheated by heat-exchanging the exhaust gas discharged to the outside after being combusted by the main boiler 1 and the feed water supplied to the main boiler 1.

In addition, an exhaust gas preheating type intake preheating unit 71 is provided in the exhaust gas pipe at the rear end of the economizer 67. In the exhaust gas preheating type intake preheating unit 71, the intake air is preheated through heat exchange between the exhaust gas which is burned in the main boiler 1 and exhausted to the outside and the air sucked into the main boiler 1.

In addition, a deaerator 73 is provided in the condensate return line L4 between the main feed pump 41 and the low pressure feed heater 61. The deaerator 73 is connected to a deaeration scavenging line L56 for extracting steam from the steam supply line L 1 between the low pressure steam turbine 13 and the medium pressure steam turbine 15 to the deaerator 73. , The steam added to the deaerator 73 operates the deaerator 73.

In addition, the water condenser 75 is provided in the condensed water recovery line L4 between the low pressure water heater 61 and the main condenser 31. A steamer extraction line L57 for extracting steam from the steam supply line L1 between the low pressure steam turbine 13 and the intermediate pressure steam turbine 15 to the water tank 75 is connected, and the water tank 75 Steam added to operate the water conditioner (75).

On the other hand, when the main feed pump 41 is driven by the main feed pump steam turbine 43, the steam after driving the main feed pump steam turbine 43 is the deaerator 73 and the water pump Supplied to (75) to assist in operating the degasser (73) and the brewer (75). In the drawing, the steam supply line L11a after the pump driving from the main feed pump steam turbine 43 to the degassing bleed line L56 and the air conditioner bleed line L57 is shown by a dotted line.

In addition, the drain line L6 including the drain pump 81 and the drain tank 83 is connected to the condensate return line L4 between the degasser 73 and the low pressure water heater 61.

In addition, a condensate pump 45 for the main condenser is provided in the condensate return line L4 between the water tank 75 and the main condenser 31.

In addition, a gland condenser 33 is provided in the condensate recovery line L4 between the low pressure water heater 61 and the water heater 75.

In addition, the reheat steam recovery line (L21) is connected to the general steam collecting device (L59) for additional steam to the general steam equipment 85, the additional steam to the general steam equipment (85) The steam operates the general purpose steam using apparatus 85.

The general purpose steam using apparatus 85 includes a liquid heater, an oil tank heater, an oil heater, a wastewater separator, an antifreeze heater, a gas evaporator, a gas heater, and the like.

In addition, the water tank 75 is an assistant to auxiliary steam additionally to the water tank 75 from the low-pressure water heater heater bleed line (L51) for extracting steam from the low pressure steam turbine 13 to the low pressure water heater 61 The auxiliary auxiliary extraction line L57a may be further connected. In the figure, the auxiliary bleed line L57a for the high pressure machine is shown by the dotted line.

In the present embodiment, the additional lines are illustrated by dashed lines.

In summary, in the steam turbine propulsion system according to the first embodiment, the water heater comprises one low pressure water heater 61 and three high pressure water heaters 63, 64, and 65, and the bleed line is a low pressure steam turbine. The low-pressure water supply heater bleeding line L51 for extracting steam from the low pressure water supply heater 61 from 13, and the first high pressure for extracting steam from the medium pressure steam turbine 15 to the first high pressure water supply heater 63. Extraction line L53 for water supply heater, extraction line L54 for second high pressure water supply heater for extracting steam from reheat steam recovery line L21 to second high pressure water supply heater 64, and high pressure steam turbine 11 ), And the steam supply line (L1) between the low pressure steam turbine 13 and the intermediate pressure steam turbine (15) for the third high-pressure water heater heater bleeding steam to the third high pressure water heater (65) Extractor for extracting steam from the condensate return line L4 to the deaerator 73 installed in the middle of the For the water tanker for extracting steam from the steam supply line L1 between the line L56 and the low pressure steam turbine 13 and the medium pressure steam turbine 15 to the water tank 75 installed in the middle of the condensate recovery line L4. It is comprised from the bleeding line L57 and the bleeding line L59 for general use steam use equipment which extracts steam from the reheat steam recovery line L21 to the general use steam use apparatus 85. As shown in FIG.

Second Embodiment

2 is a schematic configuration diagram of a steam turbine propulsion system according to a second embodiment of the present invention. In the steam turbine propulsion system according to the second embodiment, the water heater comprises one low pressure water heater 61 and two high pressure water heaters 63 and 64, and the bleed line is a low pressure water supply from the low pressure steam turbine 13. The extraction line L51 for low pressure water supply heater for extracting steam to the heater 61 and the extraction line for the first high pressure water supply heater for extracting steam from the medium pressure steam turbine 15 to the first high pressure water supply heater 63 ( L53), a second high pressure water supply heater bleed line L54 for extracting steam from the reheat steam recovery line L21 to the second high pressure water heater 64, a low pressure steam turbine 13, and an intermediate pressure steam turbine. A deaeration scavenging line L56 for extracting steam from a steam supply line L1 between the lines 15 to a deaerator 73 installed in the middle of the condensate recovery line L4, a low pressure steam turbine 13, and an intermediate pressure steam; Installed in the middle of the condensate return line L4 from the steam supply line L1 between the turbines 15. Steam collecting line L57 for adding steam to the hand 75, and general steam collecting device L59 for extracting steam from the reheating steam recovery line L21 to the general steam collecting device 85. It is composed of.

In the second embodiment, the remaining parts other than the above-described configuration are the same as in the first embodiment, and thus description thereof will be omitted.

Third Embodiment

3 is a schematic configuration diagram of a steam turbine propulsion system according to a third embodiment of the present invention. In the steam turbine propulsion system according to the third embodiment, the water heater comprises one low pressure water heater 61 and two high pressure water heaters 63 and 64, and the bleed line is supplied from the low pressure steam turbine 13 to the low pressure water supply. The extraction line L51 for low pressure water supply heater for extracting steam to the heater 61 and the extraction line for the first high pressure water supply heater for extracting steam from the medium pressure steam turbine 15 to the first high pressure water supply heater 63 ( L53, a second high pressure water supply heater bleed line L54 for extracting steam from the high pressure steam turbine 11 to the second high pressure water heater 64, a low pressure steam turbine 13, and an intermediate pressure steam turbine 15 Degassing bleeding line (L56) for extracting steam from the steam supply line (L1) between the condensate recovery line (L4) in the middle of the degassing unit (73), the low pressure steam turbine 13 and the medium pressure steam turbine ( Water heater 75 installed in the middle of the condensate recovery line (L4) from the steam supply line (L1) between 15). And assistant appointed extraction line (L57) to the extraction of steam, it is configured as a normal steam japyong sayonggi appointed extraction line (L59) to the steam extraction in general japyong steam using device (85) from the steam return line (L21) for reheating.

In the third embodiment, the remaining parts other than the above-described configuration are the same as in the first embodiment, and thus description thereof will be omitted.

Fourth Example

4 is a schematic configuration diagram of a steam turbine propulsion system according to a fourth embodiment of the present invention. In the steam turbine propulsion system according to the fourth embodiment, the water heater comprises one low pressure water heater 61 and two high pressure water heaters 63 and 64, and the bleed line is a low pressure water supply from the low pressure steam turbine 13. The extraction line L51 for low pressure water supply heater for extracting steam to the heater 61 and the extraction line for the first high pressure water supply heater for extracting steam from the reheat steam recovery line L21 to the first high pressure water supply heater 63. (L53), the extraction line (L54) for the second high pressure water supply heater for extracting steam from the high pressure steam turbine 11 to the second high pressure water heater (64), the low pressure steam turbine (13) and the intermediate pressure steam turbine ( Degassing bleeding line (L56) for extracting steam from the steam supply line (L1) between the condensate recovery line (L4) between the steam supply line (L1), low pressure steam turbine 13 and the intermediate pressure steam turbine Tank installed in the middle of the condensate recovery line (L4) from the steam supply line (L1) between the (15) Steam collecting line L57 for adding steam to machine 75, and extraction line L59 for general general purpose steam using device, which extracts steam from reheating steam recovery line L21, to general steam collecting device 85 for general use. It is composed of.

In the fourth embodiment, the remaining parts other than the above-described configuration are the same as in the first embodiment, and thus description thereof will be omitted.

Fifth Embodiment

5 is a schematic configuration diagram of a steam turbine propulsion system according to a fifth embodiment of the present invention. In the steam turbine propulsion system according to the fifth embodiment, the water heater comprises one low pressure water heater 61 and one high pressure water heater 63, and the bleed line is connected to the low pressure water heater from the low pressure steam turbine 13. 61, the low-pressure water heater heater extraction line (L51) for extracting steam, the high-pressure water heater heater extraction unit (L53) for extracting steam from the reheat steam recovery line (L21), high pressure Steam supply between the low pressure steam turbine 13 and the medium pressure steam turbine 15 and the second high pressure water heater bleed line L54 for extracting steam from the steam turbine 11 to the second high pressure water heater 64. Steam between the low pressure steam turbine 13 and the medium pressure steam turbine 15, and the degassing bleed line L56 for extracting steam from the line L1 to the degasser 73 installed in the middle of the condensate recovery line L4. From the supply line (L1) to the water tank 75 installed in the middle of the condensate recovery line (L4) Steam preheating intake preheating unit installed in the main boiler (1) from the steam supply line (L1) between the low pressure steam turbine 13 and the medium pressure steam turbine (15) for the water tank for extracting the team to extract the team Extraction line (L58) for steam preheating intake preheating unit for extracting steam to 77) and extraction line for general use steam using device for extracting steam from reheat steam recovery line (L21) to general use steam using device (85). (L59).

In the steam preheating type intake preheating unit 77, the steam drawn from the steam supply line L1 between the low pressure steam turbine 13 and the medium pressure steam turbine 15 and the air sucked into the main boiler 1 are exchanged. Preheat intake air. Therefore, in the steam turbine propulsion system according to the fifth embodiment, the exhaust gas preheating type intake preheating unit 71 of the steam turbine propulsion system according to the first embodiment is not required.

The steam after heat exchange with the suction air in the steam preheating type intake preheating unit 77 is supplied to the low pressure water supply heater 61 to assist in operating the low pressure water supply heater 61.

In the fifth embodiment, other parts than the above-described configuration are the same as in the first embodiment, and thus description thereof will be omitted.

Sixth Example

6 is a schematic configuration diagram of a steam turbine propulsion system according to a sixth embodiment of the present invention. In the steam turbine propulsion system according to the sixth embodiment, the low pressure water supply in which the water supply heater is composed of one low pressure water supply heater 61, and the bleed line further extracts steam from the low pressure steam turbine 13 to the low pressure water supply heater 61. Steam is added to the deaerator 73 provided in the middle of the condensate return line L4 from the steam supply line L1 between the heater extraction line L51 and the low pressure steam turbine 13 and the intermediate pressure steam turbine 15. Steam from the steam supply line (L1) between the degassing scavenging line (L56) and the low pressure steam turbine 13 and the medium pressure steam turbine 15 to the condensate recovery line (L4). Steam preheating type intake preheating unit 77 installed in main boiler 1 from steam supply line L1 between the low pressure steam turbine 13 and the medium pressure steam turbine 15, and the supplementary air extraction unit L57 for additionally A steam extraction line L58 for steam preheating intake air preheating unit for extracting steam The steam extracting line (L21) from the general steam for general use device 85 to extract steam to the general use steam for additional equipment (L59).

In the sixth embodiment, other parts than the above-described configuration are the same as in the fifth embodiment, and thus description thereof will be omitted.

Seventh Example

7 is a schematic configuration diagram of a steam turbine propulsion system according to a seventh embodiment of the present invention. In the steam turbine propulsion system according to the seventh embodiment, the water heater comprises one low pressure water heater 61 and three high pressure water heaters 63, 64, 65, and the bleeding line is provided from the low pressure steam turbine 13. Extraction line L51 for low pressure water heater to extract steam to low pressure water heater 61, and extraction for first high pressure water heater to extract steam from intermediate pressure steam turbine 15 to first high pressure water heater 63 Line L53, the extraction line L54 for the second high pressure water supply heater for extracting steam from the reheat steam recovery line L21 to the second high pressure water heater 64, and the third from the high pressure steam turbine 11; Condensate recovery line from the steam supply line L1 between the low pressure steam turbine 13 and the medium pressure steam turbine 15 and the third high pressure water heater bleeding line L55 for extracting steam to the high pressure water heater 65. Degassing scavenging line L56 for extracting steam to degassing unit 73 provided in the middle of L4, and low A steamer extraction line L57 for extracting steam from the steam supply line L1 between the steam turbine 13 and the intermediate pressure steam turbine 15 to the water tank 75 installed in the middle of the condensate recovery line L4; The first high-pressure water supply heater for brewing line (L53) to the general steam for general use device 85 to the steam for additional general use steam consuming device is composed of a bleed line (L59).

In the seventh embodiment, the remaining parts other than the above-described configuration are the same as in the first embodiment, and thus description thereof will be omitted.

Eighth Embodiment

8 is a schematic configuration diagram of a steam turbine propulsion system according to an eighth embodiment of the present invention. In the steam turbine propulsion system according to the eighth embodiment, the water heater comprises one low pressure water heater 61 and two high pressure water heaters 63 and 64, and the bleed line is a low pressure water supply from the low pressure steam turbine 13. The extraction line L51 for low pressure water supply heater for extracting steam to the heater 61 and the extraction line for the first high pressure water supply heater for extracting steam from the medium pressure steam turbine 15 to the first high pressure water supply heater 63 ( L53), a second high pressure water supply heater bleed line L54 for extracting steam from the reheat steam recovery line L21 to the second high pressure water heater 64, a low pressure steam turbine 13, and an intermediate pressure steam turbine. A deaeration scavenging line L56 for extracting steam from a steam supply line L1 between the lines 15 to a deaerator 73 installed in the middle of the condensate recovery line L4, a low pressure steam turbine 13, and an intermediate pressure steam; Installed in the middle of the condensate return line L4 from the steam supply line L1 between the turbines 15. Extractor line for general use steam for adding steam to the general use steam apparatus 85 for extracting steam from the first high pressure water supply heater L53 for extracting steam to the water receiver 75 and the extraction line L53 for the high pressure water supply heater. (L59).

In the eighth embodiment, the remaining parts other than the above-described configuration are the same as in the first embodiment, and thus description thereof will be omitted.

<Example 9>

9 is a schematic configuration diagram of a steam turbine propulsion system according to a ninth embodiment of the present invention. In the steam turbine propulsion system according to the ninth embodiment, the water heater comprises one low pressure water heater 61 and two high pressure water heaters 63 and 64, and the bleed line is a low pressure water supply from the low pressure steam turbine 13 The extraction line L51 for low pressure water supply heater for extracting steam to the heater 61 and the extraction line for the first high pressure water supply heater for extracting steam from the medium pressure steam turbine 15 to the first high pressure water supply heater 63 ( L53, a second high pressure water supply heater bleed line L54 for extracting steam from the high pressure steam turbine 11 to the second high pressure water heater 64, a low pressure steam turbine 13, and an intermediate pressure steam turbine 15 Degassing bleeding line (L56) for extracting steam from the steam supply line (L1) between the condensate recovery line (L4) in the middle of the degassing unit (73), the low pressure steam turbine 13 and the medium pressure steam turbine ( Water heater 75 installed in the middle of the condensate recovery line (L4) from the steam supply line (L1) between 15). A steam collecting line L57 for extracting steam and a general steam collecting device L59 for extracting steam from the first high-pressure water heater extraction line L53 to the general steam generator 85 are configured. will be.

In the ninth embodiment, the remaining parts other than the above-described configuration are the same as in the first embodiment, and thus description thereof will be omitted.

<Example 10>

10 is a schematic configuration diagram of a steam turbine propulsion system according to a tenth embodiment of the present invention. In the steam turbine propulsion system according to the tenth embodiment, the water heater comprises one low pressure water heater 61 and three high pressure water heaters 63, 64, 65, and the bleeding line is provided from the low pressure steam turbine 13. Extraction line L51 for low pressure water heater to extract steam to low pressure water heater 61, and extraction for first high pressure water heater to extract steam from intermediate pressure steam turbine 15 to first high pressure water heater 63 Line L53, the extraction line L54 for the second high pressure water supply heater for extracting steam from the reheat steam recovery line L21 to the second high pressure water heater 64, and the third from the high pressure steam turbine 11; Condensate recovery line from the steam supply line L1 between the low pressure steam turbine 13 and the medium pressure steam turbine 15 and the third high pressure water heater bleeding line L55 for extracting steam to the high pressure water heater 65. Degassing scavenging line L56 for extracting steam to degassing unit 73 provided in the middle of L4, and low A steamer extraction line L57 for extracting steam from the steam supply line L1 between the pressure steam turbine 13 and the intermediate pressure steam turbine 15 to the water tank 75 installed in the middle of the condensate recovery line L4; In addition, the medium pressure steam turbine (15) is composed of a general general steam device for additional steam extraction unit (L59) for extracting steam from the general steam equipment (85).

In the tenth embodiment, other parts than the above-described configuration are the same as in the first embodiment, and thus description thereof will be omitted.

<Eleventh embodiment>

11 is a schematic configuration diagram of a steam turbine propulsion system according to an eleventh embodiment of the present invention. In the steam turbine propulsion system according to the eleventh embodiment, the water heater comprises one low pressure water heater 61 and two high pressure water heaters 63 and 64, and the bleed line is low pressure from the low pressure steam turbine 13. Extraction line L51 for low pressure water supply heater for extracting steam to feed water heater 61, and extraction line for first high pressure water supply heater for extracting steam from medium pressure steam turbine 15 to first high pressure water supply heater 63 (L53), the extraction line L54 for the second high pressure water supply heater for extracting steam from the reheat steam recovery line L21 to the second high pressure water supply heater 64, the low pressure steam turbine 13, and the intermediate pressure steam. A deaeration bleeding line L56 for extracting steam from the steam supply line L1 between the turbines 15 to the deaerator 73 provided in the middle of the condensate recovery line L4, a low pressure steam turbine 13, and an intermediate pressure. Installed in the middle of the condensate return line L4 from the steam supply line L1 between the steam turbines 15. A steam collecting line L57 for extracting steam to the water purifier 75 and a general steam collecting device L59 for extracting steam from the medium pressure steam turbine 15 to the general steam generator 85. It is composed of.

In the eleventh embodiment, the remaining parts other than the above-described configuration are the same as in the first embodiment, and thus description thereof will be omitted.

<Twelfth Example>

12 is a schematic configuration diagram of a steam turbine propulsion system according to a twelfth embodiment of the present invention. In the steam turbine propulsion system according to the twelfth embodiment, the water heater comprises one low pressure water heater 61 and two high pressure water heaters 63 and 64, and the bleed line is a low pressure water supply from the low pressure steam turbine 13; The extraction line L51 for low pressure water supply heater for extracting steam to the heater 61 and the extraction line for the first high pressure water supply heater for extracting steam from the medium pressure steam turbine 15 to the first high pressure water supply heater 63 ( L53, a second high pressure water supply heater bleed line L54 for extracting steam from the high pressure steam turbine 11 to the second high pressure water heater 64, a low pressure steam turbine 13, and an intermediate pressure steam turbine 15 Degassing bleeding line (L56) for extracting steam from the steam supply line (L1) between the condensate recovery line (L4) in the middle of the degassing unit (73), the low pressure steam turbine 13 and the medium pressure steam turbine ( Water heater 75 installed in the middle of the condensate return line (L4) from the steam supply line (L1) between 15). ) Is composed of a steaming machine extraction line (L57) for extracting steam, and a general general-purpose steam using apparatus bleeding line (L59) for extracting steam from the medium pressure steam turbine (15).

In the twelfth embodiment, the remaining parts other than the above-described configuration are the same as in the first embodiment, and thus description thereof will be omitted.

<Thirteenth Example>

13 is a schematic configuration diagram of a steam turbine propulsion system according to a thirteenth embodiment of the present invention. In the steam turbine propulsion system according to the thirteenth embodiment, the water heater comprises one low pressure water heater 61 and two high pressure water heaters 63 and 64, and the bleed line is a low pressure water supply from the low pressure steam turbine 13. The extraction line L51 for low pressure water supply heater for extracting steam to the heater 61 and the extraction line for the first high pressure water supply heater for extracting steam from the reheat steam recovery line L21 to the first high pressure water supply heater 63. (L53), the extraction line (L54) for the second high pressure water supply heater for extracting steam from the high pressure steam turbine (11) to the second high pressure water heater (64), the low pressure steam turbine (13) and the intermediate pressure steam turbine ( Degassing bleeding line (L56) for extracting steam from the steam supply line (L1) between the condensate recovery line (L4) between the steam supply line (L1), low pressure steam turbine 13 and the intermediate pressure steam turbine Tank installed in the middle of the condensate recovery line (L4) from the steam supply line (L1) between the (15) From the medium pressure steam turbine 15 to the general purpose steam using apparatus 85 to extract steam from the medium pressure steam turbine 15 to the extraction line L59 for general general purpose steam using apparatus to extract steam to the hand 75. It is composed.

In the thirteenth embodiment, the remaining parts other than the above-described configuration are the same as in the first embodiment, and thus description thereof will be omitted.

<Example 14>

14 is a schematic configuration diagram of a steam turbine propulsion system according to a fourteenth embodiment of the present invention. In the steam turbine propulsion system according to the fourteenth embodiment, the water heater comprises one low pressure water heater 61 and one high pressure water heater 63, and the bleed line is connected to the low pressure water heater from the low pressure steam turbine 13. 61, the low-pressure water heater heater extraction line (L51) for extracting steam, the high-pressure water heater heater extraction unit (L53) for extracting steam from the reheat steam recovery line (L21), high pressure Steam supply between the low pressure steam turbine 13 and the medium pressure steam turbine 15 and the second high pressure water heater bleed line L54 for extracting steam from the steam turbine 11 to the second high pressure water heater 64. Between the low pressure steam turbine 13 and the medium pressure steam turbine 15, and a deaeration scavenging line L56 for extracting steam from the line L1 to the deaerator 73 installed in the middle of the condensate recovery line L4. From the steam supply line (L1) to the water tank 75 installed in the middle of the condensate recovery line (L4) Steam preheating intake preheating unit installed in the main boiler (1) from the steam supply line (L1) between the low pressure steam turbine 13 and the medium pressure steam turbine (15) 77) the extraction line (L58) for the steam preheating type intake preheating unit for extracting steam to the steam; and the extraction line for the general purpose steam using apparatus for extracting steam from the medium pressure steam turbine (15) to the general use steam apparatus (85). L59).

In the fourteenth embodiment, the remaining parts other than the above-described configuration are the same as in the fifth embodiment, and thus description thereof will be omitted.

<Example 15>

15 is a schematic configuration diagram of a steam turbine propulsion system according to a fifteenth embodiment of the present invention. In the steam turbine propulsion system according to the fifteenth embodiment, the low pressure water supply in which the water supply heater is composed of one low pressure water supply heater 61, and the bleed line further extracts steam from the low pressure steam turbine 13 to the low pressure water supply heater 61 Steam is added to the deaerator 73 provided in the middle of the condensate return line L4 from the steam supply line L1 between the heater extraction line L51 and the low pressure steam turbine 13 and the intermediate pressure steam turbine 15. Steam from the steam supply line (L1) between the degassing scavenging line (L56) and the low pressure steam turbine 13 and the medium pressure steam turbine 15 to the condensate recovery line (L4). Steam preheating type intake preheating unit 77 installed in the main boiler 1 from a steam supply line L1 between the low pressure steam turbine 13 and the medium pressure steam turbine 15 and a steam pumping line L57 for additional extraction. A steam extraction line (L58) for steam preheating intake air preheating unit to extract steam, Ganap is composed of a steam turbine 15. Steam general japyong equipment (85) common japyong steam sayonggi appointed extraction line (L59) to a bleed steam from.

In the fifteenth embodiment, the remaining parts other than the above-described configuration are the same as in the fifth embodiment, and thus description thereof will be omitted.

<Example 16>

16 is a schematic diagram of a steam turbine propulsion system according to a sixteenth embodiment of the present invention. The steam turbine propulsion system according to the sixteenth embodiment exemplifies two low pressure water heaters. In the case where there are two low pressure water heaters, that is, the first and second low pressure water heaters 61 and 62, the bleed line for the low pressure water heater may transfer steam from the low pressure steam turbine 13 to the first low pressure water heater 61. The first low pressure water supply heater bleeding line L51 to be added, and the second low pressure water supply heater bleed line L52 for bleeding steam from the low pressure steam turbine 13 to the second low pressure water heater 62 are included.

In this way, the low pressure water supply heater is composed of two, that is, the first and second low pressure water supply heaters 61 and 62, and the extraction line for the low pressure water supply heater is the first extraction pressure line L51 for the low pressure water supply heater and the second low pressure. The matters constituted by the bleeding line L52 for the water supply heater are applicable to all of the above-described first to fifteenth embodiments.

In the sixteenth embodiment, other parts than the above-described configuration are the same as those of the first to fifteenth embodiments, and thus description thereof will be omitted.

While the invention has been described above with reference to specific embodiments, various modifications, changes or modifications may be made in the art within the spirit and scope of the appended claims, and thus, the foregoing description and drawings It should be construed as illustrating the present invention rather than limiting the technical spirit of the present invention.

As described above, according to the steam turbine propulsion system and method of the present invention, since the steam discharged from the steam turbine in the LNG carrier is reheated and steam is additionally used, the overall propulsion efficiency is increased.

Claims (37)

A steam turbine propulsion system that generates steam in a main boiler and supplies the high pressure steam turbine and the low pressure steam turbine in turn through a steam supply line to drive the steam turbine. An intermediate pressure steam turbine installed between the high pressure steam turbine and the low pressure steam turbine; Richter further installed in the main boiler; A steam recovery line for reheating connected from the rear end of the high pressure steam turbine to the front end of the Richter; A reheat steam supply line connected from a rear end of the richter to a front end of the medium pressure steam turbine; Is connected to a steam-using device from at least one of the high pressure steam turbine, the low pressure steam turbine, the medium pressure steam turbine, the reheat steam recovery line, and the steam supply line between the low pressure steam turbine and the medium pressure steam turbine. Including the additional line for extracting steam to the steam using device, The steam using apparatus includes a water tanker installed in the middle of the condensate recovery line for supplying the condensate condensed steam from the low pressure steam turbine to the main boiler, The bleeding line comprises a steam turbine propulsion system for the steamer for extracting the steam from the steam supply line between the low pressure steam turbine and the medium pressure steam turbine to the air conditioner. The method according to claim 1, The steam using apparatus further comprises at least one water heater installed in the middle of the condensate recovery line for supplying the main boiler with condensed water condensed steam from the low pressure steam turbine, The bleeding line further includes a bleeding line for a feed water heater for bleeding steam from at least one of the high pressure steam turbine, the low pressure steam turbine, the medium pressure steam turbine, and the reheat steam recovery line to the water heater. Steam turbine propulsion system. The method according to claim 1, The steam using apparatus further includes a degasser installed in the middle of a condensate return line for supplying condensate condensed with steam from the low pressure steam turbine to the main boiler, The extraction line further comprises a steam turbine propulsion system for extracting steam from the steam supply line between the low pressure steam turbine and the medium pressure steam turbine to the degasser. delete The method according to claim 1, The steam using apparatus further includes a steam preheating type intake preheating unit installed in the main boiler, The bleeding line further comprises a bleed line for steam preheating intake preheating unit for extracting steam from the steam supply line between the low pressure steam turbine and the medium pressure steam turbine to the steam preheating intake preheating unit. Steam turbine propulsion system. The method according to claim 1, The steam using apparatus further includes a general general steam using apparatus, The extraction line further comprises a steam turbine propulsion system for the general steam re-use unit for extracting steam from the reheat steam recovery line or the medium pressure steam turbine to the general steam generator. The method according to claim 2, The water heater includes one or two low pressure water heater and three high pressure water heater, The bleeding line for the feedwater heater includes a bleeding line for low pressure water supply heater for extracting steam from the low pressure steam turbine to the low pressure water heater, and a first high pressure water supply heater for bleeding steam from the medium pressure steam turbine to the first high pressure water heater. And a second high pressure water heater for extracting steam from the reheat steam recovery line to the second high pressure water heater, and a third high pressure steam for extracting steam from the high pressure steam turbine to the third high pressure water heater. Steam turbine propulsion system comprising a bleed line for feed water heater. The method according to claim 2, The water heater includes one or two low pressure water heater and two high pressure water heater, The bleeding line for the feedwater heater includes a bleeding line for low pressure water supply heater for extracting steam from the low pressure steam turbine to the low pressure water heater, and a first high pressure water supply heater for bleeding steam from the medium pressure steam turbine to the first high pressure water heater. A steam turbine propulsion system comprising: a scavenging line for extracting steam from the reheat steam recovery line and a second high-pressure feedwater heater. The method according to claim 2, The water heater includes one or two low pressure water heater and two high pressure water heater, The bleeding line for the feedwater heater is a bleeding line for low pressure water heater to extract steam from the low pressure steam turbine to the low pressure water heater, and a first high pressure water supply for bleeding steam from the medium pressure steam turbine to the first high pressure water heater A steam turbine propulsion system comprising: a bleeding line for a heater; and a bleeding line for a second high pressure water heater for extracting steam from the high pressure steam turbine to a second high pressure water heater. The method according to claim 2, The water heater includes one or two low pressure water heater and two high pressure water heater, The bleeding line for the feed water heater is a bleed line for low pressure water heater to bleed steam from the low pressure steam turbine to the low pressure water heater, and a first high-pressure water feed heater for bleeding steam from the reheat steam recovery line to the high pressure water heater A steam turbine propulsion system, comprising: a scavenging line for extracting steam from the high pressure steam turbine to a second high pressure water heater. The method according to claim 2, The water heater includes one or two low pressure water heater and one high pressure water heater, The feed water heater bleeding line is a low pressure water heater bleeding line for extracting steam from the low pressure steam turbine to the low pressure water heater, and a high pressure water bleeding heater for bleeding steam from the reheat steam recovery line to the high pressure water heater. Steam turbine propulsion system comprising a line. The method according to claim 2, The water heater includes one or two low pressure water heater, The extraction line for the feed water heater is a steam turbine propulsion system comprising a bleed line for low pressure water supply heater for extracting steam from the low pressure steam turbine to the low pressure water heater. The method according to any one of claims 7 to 12, In the case of two low-pressure water supply heaters, the low-pressure water heater bleeding line includes a first low-pressure water heater bleeding line for extracting steam from the low-pressure steam turbine to a first low-pressure water heater and a second from the low-pressure steam turbine. A steam turbine propulsion system comprising a bleed line for a second low pressure feed water heater for extracting steam to a low pressure feed water heater. The method according to any one of claims 7 to 10, A degasser scavenging line for extracting steam from the steam supply line between the low pressure steam turbine and the medium pressure steam turbine to a degasser installed in the middle of the condensate recovery line; A steamer scavenging line for extracting steam from the steam supply line between the low pressure steam turbine and the medium pressure steam turbine to an air conditioner installed in the middle of the condensate recovery line; Steam turbine propulsion system comprising a steam extraction line for general general purpose steam using apparatus for extracting steam from the reheat steam recovery line for general use steam. The method according to claim 11 or 12, A degasser scavenging line for extracting steam from the steam supply line between the low pressure steam turbine and the medium pressure steam turbine to a degasser installed in the middle of the condensate recovery line; A steamer scavenging line for extracting steam from the steam supply line between the low pressure steam turbine and the medium pressure steam turbine to an air conditioner installed in the middle of the condensate recovery line; A steam preheating intake preheating unit for extracting steam from the steam supply line between the low pressure steam turbine and the intermediate pressure steam turbine to the steam preheating intake preheating unit installed in the main boiler; Steam turbine propulsion system comprising a steam extraction line for general general purpose steam using apparatus for extracting steam from the reheat steam recovery line for general use steam. The method according to any one of claims 7 to 9, A degasser scavenging line for extracting steam from the steam supply line between the low pressure steam turbine and the medium pressure steam turbine to a degasser installed in the middle of the condensate recovery line; A steamer scavenging line for extracting steam from the steam supply line between the low pressure steam turbine and the medium pressure steam turbine to an air conditioner installed in the middle of the condensate recovery line; A steam turbine propulsion system comprising a scavenging line for a general purpose steam consuming device for extracting steam from the first high-pressure water heater bleeding line to a general purpose steam using device. The method according to any one of claims 7 to 10, A degasser scavenging line for extracting steam from the steam supply line between the low pressure steam turbine and the medium pressure steam turbine to a degasser installed in the middle of the condensate recovery line; A steamer scavenging line for extracting steam from the steam supply line between the low pressure steam turbine and the medium pressure steam turbine to an air conditioner installed in the middle of the condensate recovery line; A steam turbine propulsion system comprising a bleed line for a general purpose steam consuming device for extracting steam from the medium pressure steam turbine to a general purpose steam consuming device. The method according to claim 11 or 12, A degasser scavenging line for extracting steam from the steam supply line between the low pressure steam turbine and the medium pressure steam turbine to a degasser installed in the middle of the condensate recovery line; A steamer scavenging line for extracting steam from the steam supply line between the low pressure steam turbine and the medium pressure steam turbine to an air conditioner installed in the middle of the condensate recovery line; A steam preheating type intake preheating unit for extracting steam from the steam supply line between the low pressure steam turbine and the intermediate pressure steam turbine to the steam preheating type intake preheating unit installed in the main boiler; A steam turbine propulsion system comprising a bleed line for a general purpose steam consuming device for extracting steam from the medium pressure steam turbine to a general purpose steam consuming device. The method according to claim 1, And a supplementary scavenging line for supplementary steamer for supplementally steaming the steam from the low-pressure water heater to the low-pressure water heater heater brewing line for extracting steam from the low-pressure steam turbine to the low pressure water heater installed in the middle of the condensate recovery line. Steam turbine propulsion system. The method according to claim 5, After the heat exchange with the suction air in the steam preheating type intake preheating unit, the steam is supplied to the low pressure water heater installed in the middle of the condensate recovery line for supplying condensed water condensed steam from the low pressure steam turbine to the main boiler. Steam turbine propulsion system. The method according to any one of claims 1 to 3, 5 and 6, The main condenser is connected to the rear end of the low pressure steam turbine by a main condensate steam recovery line, A condensate return line is connected from the rear end of the main condenser to the main boiler, Steam turbine propulsion system characterized in that the main feed water pump is installed in the middle of the condensate recovery line. The method according to claim 21, A steam turbine characterized in that the pump driving steam supply line for supplying steam to the main water pump steam turbine for driving the main water feed pump is branched in the middle of the steam supply line between the main boiler and the high pressure steam turbine. Propulsion system. The method according to claim 22, The steam turbine propulsion system, characterized in that the steam after driving the steam turbine for the main water feed pump is supplied to the deaerator or the air conditioner. The method according to any one of claims 1 to 3, 5 and 6, In the middle of the steam supply line between the main boiler and the high-pressure steam turbine is branched steam supply line for turbo generator for supplying steam to the steam generator for turbo generator, The steam turbine propulsion system, characterized in that the sub-condensing steam recovery line is connected to the front end of the main condenser at the rear end of the steam generator for the turbo generator. The method according to claim 21, And a drain line including a drain pump and a drain tank is connected to the condensate return line between the degasser and the low pressure water heater installed in the middle of the condensate return line. The method according to claim 25, The steam turbine propulsion system, characterized in that the water heater is installed in the condensate return line between the low pressure water heater and the main condenser. The method of claim 26, And a condensate pump for the main condenser is installed in the condensate return line between the water dispenser and the main condenser. The method of claim 26, And a gland condenser is installed on the condensate return line between the low pressure water heater and the water dispenser. The method according to claim 2, The economizer is installed in the pipeline of the exhaust gas of the main boiler, Steam turbine propulsion system characterized in that the water supply passing through the water heater is supplied to the main boiler through the economizer. The method of claim 29, An exhaust gas preheating type intake preheating unit configured to preheat the intake air through heat exchange between exhaust gas exhausted to the outside after combustion and air sucked into the main boiler in the exhaust gas pipe at the rear end of the economizer Steam turbine propulsion system. A steam turbine propulsion method for generating steam in a main boiler and supplying the high pressure steam turbine and the low pressure steam turbine in turn through a steam supply line to drive the steam turbine, An intermediate pressure steam turbine is installed between the high pressure steam turbine and the low pressure steam turbine, and the steam after driving the high pressure steam turbine is removed without being directly sent to the low pressure steam turbine, reheated, and then sent to the medium pressure steam turbine. Then driving the medium pressure steam turbine and then driving the low pressure steam turbine; Reheat steam recovery line for recovering to reheat steam after driving the high pressure steam turbine, the low pressure steam turbine, the medium pressure steam turbine, the high pressure steam turbine, and between the low pressure steam turbine and the medium pressure steam turbine To extract steam from at least one of the steam supply lines of the steam using apparatus, A water tank is installed in the middle of the condensate return line for supplying the main boiler with condensed water condensed steam from the low pressure steam turbine, The steam turbine propulsion method characterized in that for extracting steam from the steam supply line between the low pressure steam turbine and the medium pressure steam turbine to the water heater. The method according to claim 31, Steam after the high-pressure steam turbine is driven is steam steam propulsion method characterized in that the reheating in the Richter installed in the main boiler and then supplied to the medium pressure steam turbine. The method according to claim 31, At least one water supply heater is installed in the middle of the condensate return line for supplying condensate condensed with steam from the low pressure steam turbine to the main boiler, The steam turbine propulsion method, characterized in that for extracting steam from the at least one of the high pressure steam turbine, the low pressure steam turbine, the medium pressure steam turbine, and the reheat steam recovery line to the water supply heater. The method according to claim 31, A deaerator is installed in the middle of the condensate return line for supplying the main boiler with condensed water condensed with steam from the low pressure steam turbine, And steam is extracted from the steam supply line between the low pressure steam turbine and the medium pressure steam turbine to the deaerator. delete The method according to claim 31, Install the steam preheating type intake preheating unit in the main boiler, And steam is added to the steam preheating intake preheating unit from the steam supply line between the low pressure steam turbine and the medium pressure steam turbine. The method according to claim 31, Steam turbine propulsion method, characterized in that for extracting steam from the reheat steam recovery line or the medium-pressure steam turbine to a general-purpose steam using equipment.

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