JP2018054246A - Steam generation system - Google Patents

Steam generation system Download PDF

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JP2018054246A
JP2018054246A JP2016192953A JP2016192953A JP2018054246A JP 2018054246 A JP2018054246 A JP 2018054246A JP 2016192953 A JP2016192953 A JP 2016192953A JP 2016192953 A JP2016192953 A JP 2016192953A JP 2018054246 A JP2018054246 A JP 2018054246A
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steam
exhaust
scavenging
heat exchanger
steam generation
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憲一 柴田
Kenichi Shibata
憲一 柴田
弘行 山本
Hiroyuki Yamamoto
弘行 山本
健太郎 岡崎
Kentaro Okazaki
健太郎 岡崎
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Tsuneishi Shipbuilding Co Ltd
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Tsuneishi Shipbuilding Co Ltd
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Priority to JP2016192953A priority Critical patent/JP2018054246A/en
Priority to KR1020170114043A priority patent/KR102024989B1/en
Priority to CN201710817334.1A priority patent/CN107883363A/en
Publication of JP2018054246A publication Critical patent/JP2018054246A/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F22—STEAM GENERATION
    • F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
    • F22B1/00—Methods of steam generation characterised by form of heating method
    • F22B1/02—Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers
    • F22B1/18—Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers the heat carrier being a hot gas, e.g. waste gas such as exhaust gas of internal-combustion engines
    • F22B1/1807—Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers the heat carrier being a hot gas, e.g. waste gas such as exhaust gas of internal-combustion engines using the exhaust gases of combustion engines
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F22—STEAM GENERATION
    • F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
    • F22B1/00—Methods of steam generation characterised by form of heating method
    • F22B1/02—Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers
    • F22B1/18—Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers the heat carrier being a hot gas, e.g. waste gas such as exhaust gas of internal-combustion engines
    • F22B1/1892—Systems therefor not provided for in F22B1/1807 - F22B1/1861
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F22—STEAM GENERATION
    • F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
    • F22B33/00—Steam-generation plants, e.g. comprising steam boilers of different types in mutual association
    • F22B33/14—Combinations of low and high pressure boilers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F22—STEAM GENERATION
    • F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
    • F22B33/00—Steam-generation plants, e.g. comprising steam boilers of different types in mutual association
    • F22B33/18—Combinations of steam boilers with other apparatus
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F22—STEAM GENERATION
    • F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
    • F22B37/00—Component parts or details of steam boilers
    • F22B37/02—Component parts or details of steam boilers applicable to more than one kind or type of steam boiler
    • F22B37/26—Steam-separating arrangements
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E20/00—Combustion technologies with mitigation potential
    • Y02E20/30—Technologies for a more efficient combustion or heat usage

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Engine Equipment That Uses Special Cycles (AREA)

Abstract

PROBLEM TO BE SOLVED: To provide a steam generation system which generates steam by utilizing heat of scavenging air efficiently, and which can convert waste heat of a prime mover thoroughly into steam.SOLUTION: A steam generation system includes: a scavenging side steam generation unit 10 including a compressed air heat exchange machine 11 arranged in a scavenging passage 1 of a prime mover 3, an air-water separating machine 12 for generating steam from a first medium heated in the compressed air heat exchange machine 11, a first circulation passage 13 for circulating the first medium between the compressed air heat exchange machine 11 and the air-water separating machine 12 and a first pump 14 arranged in the first circulation passage 13; and an exhaust side steam generation unit 20 including an exhaust heat exchange machine 21 arranged in an exhaust passage 2 of the prime mover 3, a boiler 22 for generating steam from a second medium heated in the exhaust heat exchange machine 21, a second circulation passage 23 for circulating the second medium between the exhaust heat exchange machine 21 and the boiler 22, and a second pump 24 arranged in the second circulation passage 23. Low pressure steam is generated in the scavenging side steam generation unit 10, and high pressure steam is generated in the exhaust side steam generation unit 20.SELECTED DRAWING: Figure 1

Description

本発明は、蒸気生成システムに関するものである。   The present invention relates to a steam generation system.

従来、船舶の常用航海中の船内蒸気を生成する方法として、主機関や発電機関の排ガスの熱を利用した排ガスエコノマイザーや、主機関の圧縮空気である掃気の熱を利用しボイラへの給水を加熱する給水加熱器が知られている。主機関の排ガスは比較的高温（例えば２００〜２５０℃）であり、排ガスエコノマイザーによって高温高圧の蒸気が生成できるのに対して、掃気の熱は比較的低温（例えば１７０℃）であり、掃気の熱だけで高温高圧の蒸気を生成することはできず、ボイラへの給水を加熱する用途に留まっている。   Conventionally, as a method of generating in-vessel steam during regular voyages of ships, exhaust gas economizers that use the heat of exhaust gas from main engines and power generation engines and water supply to boilers using the heat of scavenging air that is compressed air of the main engine There are known feed water heaters for heating the water. The exhaust gas of the main engine has a relatively high temperature (for example, 200 to 250 ° C.), and high-temperature and high-pressure steam can be generated by the exhaust gas economizer, whereas the scavenging heat has a relatively low temperature (for example, 170 ° C.). It is not possible to generate high-temperature and high-pressure steam only with this heat, and it remains for the purpose of heating the feed water to the boiler.

一方、特許文献１には、原動機の廃熱を利用したボイラシステムに関する発明が記載されており、排気を熱源としてボイラ水を加熱するボイラ部に対して、掃気を熱源としてボイラ水を加熱する循環路を追加して、効率良くボイラ水を加熱して蒸気を生成するようになっている。   On the other hand, Patent Document 1 describes an invention related to a boiler system that uses waste heat of a prime mover, and circulation for heating boiler water using scavenging as a heat source with respect to a boiler unit that heats boiler water using exhaust as a heat source. By adding a passage, the boiler water is efficiently heated to generate steam.

特開２０１５−１７７７０号公報JP 2015-17770 A

しかしながら、主機関の継続的な熱効率の向上により排ガスの温度が低くなると、排ガスエコノマイザーにより十分なエネルギーを回収することができず、また発電機の排ガスエコノマイザーを併用しても常用航海中の船内蒸気の確保ができなくなるという問題があった。また、掃気の熱を利用しボイラへの給水を加熱する給水加熱器では、ボイラへの給水温度を上げる（例えば６０℃→１１０℃）ことにより生成する蒸気量を増加することはできるが、生成量が十分ではなかった。   However, if the temperature of the exhaust gas is lowered due to continuous improvement of the thermal efficiency of the main engine, sufficient energy cannot be recovered by the exhaust gas economizer, and even if the exhaust gas economizer of the generator is used in combination, There was a problem that it was impossible to secure steam on board. Moreover, in the feed water heater that heats the feed water to the boiler using the heat of scavenging, the amount of steam generated can be increased by raising the feed water temperature to the boiler (for example, 60 ° C. → 110 ° C.). The amount was not enough.

一方、特許文献１に記載された発明のボイラシステムの場合、掃気の熱はボイラ部のボイラ水を加熱する補助的な役割として用いられるものであり、掃気の熱のみで蒸気を生成するものではない。また、掃気の熱が不十分な場合には、別途ＯＲＣ熱交換器（蓄熱機）で熱を回収するようになっている。従って、掃気の熱の利用が必ずしも効率的とはいえない。   On the other hand, in the case of the boiler system of the invention described in Patent Document 1, the heat of scavenging is used as an auxiliary role to heat the boiler water in the boiler section, and steam is generated only by the heat of scavenging. Absent. Moreover, when the heat of scavenging is insufficient, heat is separately collected by an ORC heat exchanger (heat accumulator). Therefore, the use of scavenging heat is not always efficient.

本発明は、上記従来の課題を解決するものであり、掃気の熱を効率的に利用して蒸気を生成するとともに、原動機の廃熱を余すことなく蒸気に変換することの可能な蒸気生成システムを提供するものである。   The present invention solves the above-mentioned conventional problems, and generates steam by efficiently using the heat of scavenging, and is capable of converting the waste heat of the prime mover into steam without leaving excess. Is to provide.

上記課題を解決するため、本発明の蒸気生成システムは、原動機の掃気路に配置された圧縮空気熱交換機と、前記圧縮空気熱交換機で加熱された媒体から蒸気を生成する気水分離機と、前記圧縮空気熱交換機と前記気水分離機との間で前記媒体を循環させる循環路と、前記循環路に配置されたポンプとを有する掃気側蒸気生成部とを備えたことを特徴とする。   In order to solve the above problems, a steam generation system of the present invention includes a compressed air heat exchanger disposed in a scavenging passage of a prime mover, a steam separator that generates steam from a medium heated by the compressed air heat exchanger, A scavenging-side steam generator having a circulation path for circulating the medium between the compressed air heat exchanger and the steam separator and a pump disposed in the circulation path is provided.

また本発明の蒸気生成システムは、原動機の掃気路に配置された圧縮空気熱交換機と、前記圧縮空気熱交換機で加熱された第１媒体から蒸気を生成する気水分離機と、前記圧縮空気熱交換機と前記気水分離機との間で前記第１媒体を循環させる第１循環路と、前記第１循環路に配置された第１ポンプとを有する掃気側蒸気生成部と、原動機の排気路に配置された排気熱交換機と、前記排気熱交換機で加熱された第２媒体から蒸気を生成するボイラと、前記排気熱交換機と前記ボイラとの間で前記第２媒体を循環させる第２循環路と、前記第２循環路に配置された第２ポンプとを有する排気側蒸気生成部とを備え、前記掃気側蒸気生成部で低圧蒸気を生成し、前記排気側蒸気生成部で高圧蒸気を生成することを特徴とする。   The steam generation system of the present invention includes a compressed air heat exchanger disposed in a scavenging passage of a prime mover, a steam separator that generates steam from a first medium heated by the compressed air heat exchanger, and the compressed air heat. A scavenging-side steam generator having a first circulation path for circulating the first medium between the exchanger and the steam separator, a first pump disposed in the first circulation path, and an exhaust path of the prime mover An exhaust heat exchanger disposed in the boiler, a boiler that generates steam from the second medium heated by the exhaust heat exchanger, and a second circulation path that circulates the second medium between the exhaust heat exchanger and the boiler And an exhaust-side steam generator having a second pump disposed in the second circulation path, the scavenging-side steam generator generates low-pressure steam, and the exhaust-side steam generator generates high-pressure steam It is characterized by doing.

また好ましくは、前記排気側蒸気生成部で生成した高圧蒸気を減圧して前記掃気側蒸気生成部に供給することを特徴とする。   Preferably, the high-pressure steam generated by the exhaust side steam generation unit is decompressed and supplied to the scavenging side steam generation unit.

また好ましくは、前記原動機が船舶の主機関又は発電機であることを特徴とする。   Preferably, the prime mover is a ship main engine or a generator.

本発明の蒸気生成システムは、原動機の掃気路に配置された圧縮空気熱交換機と、圧縮空気熱交換機で加熱された媒体から蒸気を取り出す気水分離機と、圧縮空気熱交換機と気水分離機との間で媒体を循環させる循環路と、循環路に配置されたポンプとを有する掃気側蒸気生成部とを備えている。従って、循環路の媒体をポンプで循環させながら圧縮空気熱交換機により加熱し、気水分離機で加熱した媒体から蒸気を取り出すことができ、掃気の熱を効率的に利用して蒸気を生成することができる。   The steam generation system of the present invention includes a compressed air heat exchanger disposed in a scavenging passage of a prime mover, an air / water separator that extracts steam from a medium heated by the compressed air heat exchanger, a compressed air heat exchanger, and an air / water separator. And a scavenging-side steam generator having a circulation path for circulating the medium between and a pump disposed in the circulation path. Accordingly, the medium in the circulation path is heated by the compressed air heat exchanger while being circulated by the pump, and the steam can be taken out from the medium heated by the steam separator, and the steam is efficiently generated by using the heat of the scavenging air. be able to.

また、本発明の蒸気生成システムは、原動機の掃気路に配置された圧縮空気熱交換機と、圧縮空気熱交換機で加熱された第１媒体から蒸気を取り出す気水分離機と、圧縮空気熱交換機と気水分離機との間で第１媒体を循環させる第１循環路と、第１循環路に配置された第１ポンプとを有する掃気側蒸気生成部と、原動機の排気路に配置された排気熱交換機と、排気熱交換機で加熱された第２媒体から蒸気を取り出すボイラと、排気熱交換機とボイラとの間で第２媒体を循環させる第２循環路と、第２循環路に配置された第２ポンプとを有する排気側蒸気生成部とを備えている。従って、第１循環路の第１媒体を第１ポンプで循環させながら圧縮空気熱交換機により加熱し、気水分離機で加熱した第１媒体から蒸気を取り出すことができ、掃気の熱を効率的に利用して蒸気を生成することができる。また、第２循環路の第２媒体を第２ポンプで循環させながら排気熱交換機により加熱し、ボイラで加熱した第２媒体から蒸気を取り出すことができる。排気熱の方が圧縮空気熱よりも高温であるため、掃気側蒸気生成部で低圧蒸気を生成し、排気側蒸気生成部で高圧蒸気を生成することで、原動機の廃熱を余すことなく蒸気に変換することができる。   The steam generation system of the present invention includes a compressed air heat exchanger disposed in a scavenging passage of a prime mover, an air / water separator that extracts steam from a first medium heated by the compressed air heat exchanger, and a compressed air heat exchanger. A scavenging-side steam generator having a first circulation path for circulating the first medium between the steam separator and a first pump disposed in the first circulation path, and an exhaust disposed in the exhaust path of the prime mover A heat exchanger, a boiler for extracting steam from the second medium heated by the exhaust heat exchanger, a second circulation path for circulating the second medium between the exhaust heat exchanger and the boiler, and the second circulation path An exhaust-side steam generator having a second pump. Accordingly, the first medium in the first circulation path can be heated by the compressed air heat exchanger while being circulated by the first pump, and steam can be taken out from the first medium heated by the steam separator, so that the scavenging heat can be efficiently used. Steam can be generated. Further, the second medium in the second circulation path is heated by the exhaust heat exchanger while being circulated by the second pump, and the steam can be taken out from the second medium heated by the boiler. Since the exhaust heat is hotter than the compressed air heat, the scavenging side steam generator generates low pressure steam and the exhaust side steam generator generates high pressure steam. Can be converted to

また、排気側蒸気生成部で生成した高圧蒸気を減圧して掃気側蒸気生成部に供給する場合には、掃気側蒸気生成部で生成する低圧蒸気が不足しても対応することができる。   Further, when the high-pressure steam generated in the exhaust-side steam generation unit is decompressed and supplied to the scavenging-side steam generation unit, it is possible to cope with the shortage of low-pressure steam generated in the scavenging-side steam generation unit.

また、原動機が船舶の主機関又は発電機である場合には、船内蒸気を効率的に生成することができ、熱効率の良い原動機を使用する場合であっても、ボイラを追い炊きする必要がなく、追加燃料が削減される。   In addition, when the prime mover is the main engine or generator of the ship, it is possible to generate in-steam efficiently, and even when using a highly efficient prime mover, there is no need to reheat the boiler. Additional fuel is reduced.

以上、本発明によれば、掃気の熱を効率的に利用して蒸気を生成するとともに、原動機の廃熱を余すことなく蒸気に変換することの可能な蒸気生成システムを提供することができる。   As described above, according to the present invention, it is possible to provide a steam generation system capable of efficiently generating the steam by using the heat of scavenging gas and converting the waste heat of the prime mover into the steam without remaining.

本発明の実施形態に係る蒸気生成システムの構成図である。1 is a configuration diagram of a steam generation system according to an embodiment of the present invention. 他の実施形態に係る蒸気生成システムの構成図である。It is a block diagram of the steam generation system which concerns on other embodiment. 他の実施形態に係る蒸気生成システムの構成図である。It is a block diagram of the steam generation system which concerns on other embodiment.

次に、図１を参照して、本発明の実施形態に係る蒸気生成システムについて説明する。図１は、本発明の実施形態に係る蒸気生成システム１００の構成図である。蒸気生成システム１００は、船舶の船内蒸気を生成するためのものであり、原動機３（主機関又は発電機）の廃熱を利用するものであり、掃気側蒸気生成部１０及び排気側蒸気生成部２０を備えている。そして、船内で使用する蒸気を、低圧系統（本実施形態では、０．３ＭＰａ）と、高圧系統（本実施形態では、０．５ＭＰａ）とに分けて、掃気側蒸気生成部１０で低圧蒸気を生成し、排気側蒸気生成部２０で高圧蒸気を生成するようになっている。本実施形態で使用する媒体は水である。   Next, with reference to FIG. 1, the steam generation system which concerns on embodiment of this invention is demonstrated. FIG. 1 is a configuration diagram of a steam generation system 100 according to an embodiment of the present invention. The steam generation system 100 is for generating in-vessel steam of a ship, uses waste heat of the prime mover 3 (main engine or generator), and includes a scavenging side steam generation unit 10 and an exhaust side steam generation unit. 20 is provided. The steam used in the ship is divided into a low-pressure system (0.3 MPa in this embodiment) and a high-pressure system (0.5 MPa in this embodiment), and the scavenging-side steam generator 10 generates low-pressure steam. The exhaust-side steam generator 20 generates high-pressure steam. The medium used in this embodiment is water.

なお、低圧蒸気と高圧蒸気の数値は適宜変更することができ、相対的に低圧の蒸気と高圧の蒸気とを分けて生成するように構成することができる。   Note that the numerical values of the low-pressure steam and the high-pressure steam can be changed as appropriate, and the relatively low-pressure steam and the high-pressure steam can be generated separately.

原動機３（主機関又は発電機）には、ターボチャージャー４から供給される圧縮空気が通る掃気路１が接続されている。また、原動機３（主機関又は発電機）からターボチャージャー４を介して排出される排気が通る排気路２が接続されている。   A scavenging path 1 through which compressed air supplied from the turbocharger 4 passes is connected to the prime mover 3 (main engine or generator). Further, an exhaust path 2 through which the exhaust discharged from the prime mover 3 (main engine or generator) through the turbocharger 4 passes is connected.

掃気側蒸気生成部１０は、圧縮空気熱交換機１１、気水分離機１２、第１循環路１３及び第１ポンプ１４を有している。圧縮空気熱交換機１１は、掃気路１に配置されている。圧縮空気熱交換機１１と気水分離機１２との間は第１循環路１３により接続されており、第１循環路１３には第１ポンプ１４が配置されている。そして、第１ポンプにより第１循環路１３を第１媒体が循環しながら、圧縮空気熱交換機１１により加熱され、気水分離機１２により加熱された第１媒体から蒸気が取り出される。掃気側蒸気生成部１０により生成される蒸気は、比較的低圧の蒸気（０．３ＭＰａ）である。   The scavenging side steam generator 10 includes a compressed air heat exchanger 11, a steam separator 12, a first circulation path 13, and a first pump 14. The compressed air heat exchanger 11 is disposed in the scavenging path 1. The compressed air heat exchanger 11 and the steam separator 12 are connected by a first circulation path 13, and a first pump 14 is disposed in the first circulation path 13. Then, the first medium is heated by the compressed air heat exchanger 11 while the first medium is circulated through the first circulation path 13 by the first pump, and the steam is taken out from the first medium heated by the steam separator 12. The steam generated by the scavenging-side steam generator 10 is relatively low-pressure steam (0.3 MPa).

排気側蒸気生成部２０は、排気熱交換機２１、ボイラ２２、第２循環路２３及び第２ポンプ２４を有している。排気熱交換機２１は、排気路２に配置されている。排気熱交換機２１とボイラ２２との間は第２循環路２３により接続されており、第２循環路２３には第２ポンプ２４が配置されている。そして、第２ポンプにより第２循環路２３を第２媒体が循環しながら、排気熱交換機２１により加熱され、ボイラ２２により加熱された第２媒体から蒸気が取り出される。排気側蒸気生成部２０により生成される蒸気は、比較的高圧の蒸気（０．５ＭＰａ）である。   The exhaust-side steam generator 20 includes an exhaust heat exchanger 21, a boiler 22, a second circulation path 23, and a second pump 24. The exhaust heat exchanger 21 is disposed in the exhaust path 2. The exhaust heat exchanger 21 and the boiler 22 are connected by a second circulation path 23, and a second pump 24 is disposed in the second circulation path 23. Then, the second medium is heated by the exhaust heat exchanger 21 while the second medium circulates through the second circulation path 23 by the second pump, and the steam is taken out from the second medium heated by the boiler 22. The steam generated by the exhaust side steam generation unit 20 is relatively high-pressure steam (0.5 MPa).

ここで、従来の船内蒸気として求められていたのは、比較的高圧の蒸気（０．５ＭＰａ）であり、掃気の熱は比較的低温であるため単独で高圧の蒸気を生成することは難しく、補助的な役割でしかなかった。これに対して、本実施形態に係る蒸気生成システム１００は、比較的低圧の蒸気（０．３ＭＰａ）であっても船内での用途があり得ることから、低圧系統（０．３ＭＰａ）と高圧系統（０．５ＭＰａ）とに分けてある。そして低圧系統である掃気側蒸気生成部１０で相対的に低圧の蒸気を生成し、高圧系統である排気側蒸気生成部２０で相対的に高圧の蒸気を生成するようにしたものである。   Here, what has been required as conventional steam in the ship is relatively high-pressure steam (0.5 MPa), and since the heat of scavenging is relatively low temperature, it is difficult to generate high-pressure steam alone, It was only an auxiliary role. On the other hand, since the steam generation system 100 according to the present embodiment can be used in a ship even with relatively low pressure steam (0.3 MPa), the low pressure system (0.3 MPa) and the high pressure system are used. (0.5 MPa). A scavenging-side steam generation unit 10 that is a low-pressure system generates relatively low-pressure steam, and an exhaust-side steam generation unit 20 that is a high-pressure system generates relatively high-pressure steam.

本実施形態に係る蒸気生成システム１００は、原動機３の掃気路１に配置された圧縮空気熱交換機１１と、圧縮空気熱交換機１１で加熱された第１媒体から蒸気を取り出す気水分離機１２と、圧縮空気熱交換機１１と気水分離機１２との間で第１媒体を循環させる第１循環路１３と、第１循環路１３に配置された第１ポンプ１４とを有する掃気側蒸気生成部１０と、原動機３の排気路２に配置された排気熱交換機２１と、排気熱交換機２１で加熱された第２媒体から蒸気を取り出すボイラ２２と、排気熱交換機２１とボイラ２２との間で第２媒体を循環させる第２循環路２３と、第２循環路２３に配置された第２ポンプ２４とを有する排気側蒸気生成部２０とを備えている。従って、第１循環路１３の第１媒体を第１ポンプ１４で循環させながら圧縮空気熱交換機１１により加熱し、気水分離機１２で加熱した第１媒体から蒸気を取り出すことができ、掃気の熱を効率的に利用して蒸気を生成することができる。また、第２循環路２３の第２媒体を第２ポンプ２４で循環させながら排気熱交換機２１により加熱し、ボイラ２２で加熱した第２媒体から蒸気を取り出すことができる。排気熱の方が圧縮空気熱よりも高温であるため、掃気側蒸気生成部１０で低圧蒸気を生成し、排気側蒸気生成部２０で高圧蒸気を生成することで、原動機３の廃熱を余すことなく蒸気に変換することができる。   A steam generation system 100 according to the present embodiment includes a compressed air heat exchanger 11 disposed in a scavenging passage 1 of a prime mover 3, an air / water separator 12 that extracts steam from a first medium heated by the compressed air heat exchanger 11, and The scavenging-side steam generator having a first circulation path 13 for circulating the first medium between the compressed air heat exchanger 11 and the steam separator 12 and a first pump 14 disposed in the first circulation path 13. 10, an exhaust heat exchanger 21 disposed in the exhaust path 2 of the prime mover 3, a boiler 22 that extracts steam from the second medium heated by the exhaust heat exchanger 21, and the exhaust heat exchanger 21 and the boiler 22 An exhaust-side steam generator 20 having a second circulation path 23 for circulating two media and a second pump 24 disposed in the second circulation path 23 is provided. Accordingly, the first medium in the first circulation path 13 is heated by the compressed air heat exchanger 11 while being circulated by the first pump 14, and the steam can be taken out from the first medium heated by the steam separator 12. Steam can be generated using heat efficiently. Further, the second medium in the second circulation path 23 is heated by the exhaust heat exchanger 21 while being circulated by the second pump 24, and the steam can be taken out from the second medium heated by the boiler 22. Since the exhaust heat is higher than the compressed air heat, the scavenging-side steam generation unit 10 generates low-pressure steam, and the exhaust-side steam generation unit 20 generates high-pressure steam, leaving the waste heat of the prime mover 3. Can be converted into steam without any problems.

また、原動機３が船舶の主機関又は発電機であるので、船内蒸気を効率的に生成することができ、熱効率の良い原動機を使用する場合であっても、ボイラを追い炊きする必要がなく、追加燃料が削減される。   Moreover, since the prime mover 3 is the main engine or generator of the ship, it is possible to efficiently generate steam in the ship, and even when using a highly efficient prime mover, there is no need to cook the boiler, Additional fuel is reduced.

このように、本実施形態に係る蒸気生成システム１００によれば、掃気の熱を効率的に利用して蒸気を生成するとともに、原動機の廃熱を余すことなく蒸気に変換することができる。   As described above, according to the steam generation system 100 according to the present embodiment, steam can be generated by efficiently using the heat of scavenging gas, and the waste heat of the prime mover can be converted into steam without leaving.

以上、本発明の実施形態に係る蒸気生成システムについて説明したが、本発明は上述した実施の形態に限定されるわけではなく、その他種々の変更が可能である。例えば、上記実施形態では排気側蒸気生成部２０を設けたが、図２に示す蒸気生成システム２００のように、掃気側蒸気生成部１０のみで構成して比較的低圧の蒸気を生成し、比較的高圧の蒸気は油炊きボイラ等の別の手段で生成するようにしてもよい。   Although the steam generation system according to the embodiment of the present invention has been described above, the present invention is not limited to the above-described embodiment, and various other modifications are possible. For example, although the exhaust side steam generation unit 20 is provided in the above embodiment, a comparatively low pressure steam is generated by using only the scavenging side steam generation unit 10 as in the steam generation system 200 shown in FIG. The high-pressure steam may be generated by another means such as an oil cooking boiler.

また、図３に示す蒸気生成システム３００のように、排気側蒸気生成部２０と掃気側蒸気生成部１０とを接続する接続路３０及び接続路３０上の減圧弁３１を設けて、排気側蒸気生成部２０で生成した高圧蒸気を減圧して掃気側蒸気生成部１０に供給するようにしてもよい。これにより、掃気側蒸気生成部１０で生成する低圧蒸気が不足しても対応することができる。   Further, as in the steam generation system 300 shown in FIG. 3, a connection path 30 that connects the exhaust-side steam generation section 20 and the scavenging-side steam generation section 10 and a pressure reducing valve 31 on the connection path 30 are provided, and the exhaust-side steam The high-pressure steam generated by the generation unit 20 may be decompressed and supplied to the scavenging side steam generation unit 10. Thereby, even if the low pressure steam produced | generated in the scavenging side steam production | generation part 10 runs short, it can respond.

また、本実施形態の蒸気生成システムは船舶の船内蒸気を生成するためのものであるが、原動機の廃熱を利用して蒸気を生成するものであれば船舶に限定されない。   Moreover, although the steam generation system of this embodiment is for producing | generating the ship's in-board steam, if it produces | generates steam using the waste heat of a motor | power_engine, it will not be limited to a ship.

また、本実施形態の蒸気生成システムでは媒体として水を使用したが、これに限定されるものではなく、例えば油を媒体とした熱媒油ボイラにも適用することができる。   Moreover, in the steam generation system of this embodiment, although water was used as a medium, it is not limited to this, For example, it can apply also to the heat-medium oil boiler which used oil as the medium.

１ 掃気路
２ 排気路
３ 原動機
４ ターボチャージャー
１０ 掃気側蒸気生成部
１１ 圧縮空気交換機
１２ 気水分離機
１３ 第１循環路
１４ 第１ポンプ
２０ 排気側蒸気生成部
２１ 排気熱交換機
２２ ボイラ
２３ 第２循環路
２４ 第２ポンプ
３０ 接続路
３１ 減圧弁
１００ 蒸気生成システム
２００ 蒸気生成システム
３００ 蒸気生成システム Reference Signs List 1 scavenging path 2 exhaust path 3 prime mover 4 turbocharger 10 scavenging side steam generator 11 compressed air exchanger 12 steam separator 13 first circulation path 14 first pump 20 exhaust side steam generating section 21 exhaust heat exchanger 22 boiler 23 second Circulation path 24 Second pump 30 Connection path 31 Pressure reducing valve 100 Steam generation system 200 Steam generation system 300 Steam generation system

Claims (4)

原動機の掃気路に配置された圧縮空気熱交換機と、前記圧縮空気熱交換機で加熱された媒体から蒸気を取り出す気水分離機と、前記圧縮空気熱交換機と前記気水分離機との間で前記媒体を循環させる循環路と、前記循環路に配置されたポンプとを有する掃気側蒸気生成部とを備えたことを特徴とする蒸気生成システム。   A compressed air heat exchanger disposed in a scavenging passage of a prime mover, an air / water separator that extracts steam from a medium heated by the compressed air heat exchanger, and the compressed air heat exchanger and the air / water separator between the A steam generation system comprising: a scavenging side steam generation unit having a circulation path for circulating a medium and a pump disposed in the circulation path. 原動機の掃気路に配置された圧縮空気熱交換機と、前記圧縮空気熱交換機で加熱された第１媒体から蒸気を取り出す気水分離機と、前記圧縮空気熱交換機と前記気水分離機との間で前記第１媒体を循環させる第１循環路と、前記第１循環路に配置された第１ポンプとを有する掃気側蒸気生成部と、
原動機の排気路に配置された排気熱交換機と、前記排気熱交換機で加熱された第２媒体から蒸気を取り出すボイラと、前記排気熱交換機と前記ボイラとの間で前記第２媒体を循環させる第２循環路と、前記第２循環路に配置された第２ポンプとを有する排気側蒸気生成部とを備え、
前記掃気側蒸気生成部で低圧蒸気を生成し、前記排気側蒸気生成部で高圧蒸気を生成することを特徴とする蒸気生成システム。 A compressed air heat exchanger disposed in a scavenging passage of a prime mover; an air / water separator that extracts steam from the first medium heated by the compressed air heat exchanger; and the compressed air heat exchanger and the air / water separator. A scavenging-side steam generator having a first circulation path for circulating the first medium and a first pump disposed in the first circulation path;
An exhaust heat exchanger disposed in the exhaust path of the prime mover, a boiler that extracts steam from the second medium heated by the exhaust heat exchanger, and a second medium that circulates between the exhaust heat exchanger and the boiler An exhaust-side steam generator having two circulation paths and a second pump disposed in the second circulation path,
A steam generation system, wherein the scavenging side steam generation section generates low pressure steam, and the exhaust side steam generation section generates high pressure steam. 前記排気側蒸気生成部で生成した高圧蒸気を減圧して前記掃気側蒸気生成部に供給することを特徴とする請求項２に記載の蒸気生成システム。   The steam generation system according to claim 2, wherein the high-pressure steam generated in the exhaust side steam generation unit is depressurized and supplied to the scavenging side steam generation unit. 前記原動機が船舶の主機関又は発電機であることを特徴とする請求項１乃至請求項３のうちいずれか１つに記載の蒸気生成システム。   The steam generating system according to any one of claims 1 to 3, wherein the prime mover is a main engine or a generator of a ship.
JP2016192953A 2016-09-30 2016-09-30 Steam generation system Pending JP2018054246A (en)

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