JP2005214033A - Blast furnace gas pressure power generating plant and method of flushing turbine blade in the power generating plant - Google Patents

Blast furnace gas pressure power generating plant and method of flushing turbine blade in the power generating plant Download PDF

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JP2005214033A
JP2005214033A JP2004019656A JP2004019656A JP2005214033A JP 2005214033 A JP2005214033 A JP 2005214033A JP 2004019656 A JP2004019656 A JP 2004019656A JP 2004019656 A JP2004019656 A JP 2004019656A JP 2005214033 A JP2005214033 A JP 2005214033A
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blast furnace
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JP4423983B2 (en
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Isao Mori
功 森
Hiromi Obayashi
浩海 大林
Hidekazu Sugiyama
英和 杉山
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JFE Steel Corp
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a blast furnace gas pressure power generating plant capable of simultaneously performing both power generation and flushing and preventing blast furnace gas from being cooled and a method of flushing a turbine blade in the blast furnace gas pressure power generating plant. <P>SOLUTION: This blast furnace gas pressure power generating plant comprises a blast furnace gas pipe 2, a turbine 3, a generator 4, and a steam filling means 6 installed in the blast furnace gas pipe 2 and filling steam into the blast furnace gas. A mist generated by a steam filled from the steam filling means 6 collides with the blades 32 of the turbine 3 to remove dust adhered to the blades 32. In this case, the blast furnace gas is heated and the recovery energy amount of the turbine 3 is increased. Also, a wet dust collector 8 is installed in the blast furnace gas pipe 2, and the blast furnace gas is cooled and humidified. In addition, the filled amount of the steam is 7 wt.% or less relative to the supplied amount of the blast furnace gas. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

本発明は、高炉から排出される高炉ガスによって駆動される高炉炉頂圧発電設備、および高炉炉頂圧発電設備を構成するタービンの翼を洗浄するタービン翼の洗浄方法に関する。   The present invention relates to a blast furnace top pressure power generation facility driven by a blast furnace gas discharged from a blast furnace, and a turbine blade cleaning method for cleaning turbine blades constituting the blast furnace top pressure power generation facility.

従来、ガスタービンに連結された空気圧縮機の翼に付着した塵芥（以下、ダストと称す）を除去するため、翼に洗浄水を間歇的に直接噴射して衝突水によって洗浄する洗浄装置が提案されている（例えば、特許文献１参照）。   Conventionally, in order to remove dust adhering to the blades of an air compressor connected to a gas turbine (hereinafter referred to as dust), a cleaning device has been proposed in which cleaning water is intermittently injected directly onto the blades and washed with collision water. (For example, refer to Patent Document 1).

特開平８−１４１９６号公報（３頁、図１）JP-A-8-14196 (page 3, FIG. 1)

しかしながら、前記洗浄装置は、ガスタービンを空転状態、すなわち、起動装置（補助回転装置）によって回転駆動されている状態において洗浄をするものであるため、高炉炉頂圧発電設備が起動装置（補助回転装置）を具備しない場合、これを適用することができないという問題があった。
あるいは、高炉炉頂圧発電設備を連続的に稼働する必要があるため、空転時間を設けることが困難な場合には、これを適用することができないという問題があった。
さらに、高炉炉頂圧発電設備において発電と洗浄を同時に並行して実施しようとする場合、噴射される水（衝突して飛散する水を含む）によって高炉ガスが冷却され、回収エネルギー量が低下するという問題があった。 However, since the cleaning device cleans the gas turbine in the idling state, that is, in a state where the gas turbine is rotationally driven by the starting device (auxiliary rotating device), the blast furnace top pressure power generation facility has the starting device (auxiliary rotating device). When the apparatus is not provided, there is a problem that this cannot be applied.
Alternatively, since it is necessary to continuously operate the blast furnace top pressure power generation facility, there is a problem that this cannot be applied when it is difficult to provide idle time.
Furthermore, when power generation and cleaning are performed simultaneously in the blast furnace top pressure power generation facility, the blast furnace gas is cooled by the injected water (including the water that collides and scatters), and the amount of recovered energy decreases. There was a problem.

本発明は上記に鑑みてなされたものであって、発電と洗浄を同時に並行して実施することができ、しかも、高炉ガスを冷却することがない高炉炉頂圧発電設備および高炉炉頂圧発電設備におけるタービン翼（本発明において、回転翼と固定翼をまとめて「翼」または「タービン翼」と総称する）の洗浄方法を提供することを目的とする。   The present invention has been made in view of the above, and can perform power generation and cleaning at the same time in parallel, and does not cool blast furnace gas, and blast furnace top pressure power generation. It is an object of the present invention to provide a method for cleaning turbine blades in facilities (in the present invention, the rotary blades and fixed blades are collectively referred to as “blades” or “turbine blades”).

（１）本発明に係る高炉炉頂圧発電設備は、
高炉から排出された高炉ガスを後記タービンに供給するための高炉ガス配管と、
該高炉ガス配管に接続され、前記高炉ガスによって回転されるタービンと、
該タービンに連結された発電機と、
前記高炉ガス配管に設けられ、前記高炉ガスに蒸気を注入するための蒸気注入手段とを有し、
該蒸気注入手段から注入された蒸気によって生成されたミストが、前記タービンの翼に衝突して該翼に付着したダストを除去することを特徴とする。 (1) The blast furnace top pressure power generation facility according to the present invention is:
Blast furnace gas piping for supplying the blast furnace gas discharged from the blast furnace to the turbine described later,
A turbine connected to the blast furnace gas pipe and rotated by the blast furnace gas;
A generator coupled to the turbine;
Provided in the blast furnace gas piping, and having a steam injection means for injecting steam into the blast furnace gas,
The mist generated by the steam injected from the steam injection means collides with the blades of the turbine and removes dust adhering to the blades.

（２）また、前記高炉ガス配管に湿式集塵機が設置され、前記高炉ガスが降温および加湿されることを特徴とする。 (2) Further, a wet dust collector is installed in the blast furnace gas pipe, and the blast furnace gas is cooled and humidified.

（３）また、前記注入される蒸気の量が前記タービンに供給される高炉ガスの供給量に対して質量比で７％以下であることを特徴とする。 (3) Further, the amount of the injected steam is 7% or less by mass ratio with respect to the supply amount of the blast furnace gas supplied to the turbine.

（４）さらに、本発明に係る高炉炉頂圧発電設備におけるタービン翼の洗浄方法は、
高炉から排出された高炉ガスを後記タービンに供給するための高炉ガス配管と、該高炉ガス配管に接続され、前記高炉ガスによって回転されるタービンと、該タービンに連結された発電機と、前記高炉ガス配管に設けられ、前記高炉ガスに蒸気を注入するための蒸気注入手段とを有す高炉炉頂圧発電設備において、
前記蒸気注入手段から蒸気を注入し、該注入した蒸気によって生成されたミストを前記タービンの翼に衝突させることによって、該翼に付着したダストを除去することを特徴とする。 (4) Furthermore, the turbine blade cleaning method in the blast furnace top pressure power generation facility according to the present invention includes:
A blast furnace gas pipe for supplying blast furnace gas discharged from the blast furnace to a turbine described later, a turbine connected to the blast furnace gas pipe and rotated by the blast furnace gas, a generator connected to the turbine, and the blast furnace In a blast furnace top pressure power generation facility provided with gas piping and having steam injection means for injecting steam into the blast furnace gas,
Dust adhering to the blades is removed by injecting steam from the steam injection means and causing the mist generated by the injected steam to collide with the blades of the turbine.

（５）また、前記高炉ガスを、あらかじめ降温および加湿することを特徴とする。 (5) Further, the blast furnace gas is previously cooled and humidified.

（６）また、前記注入される蒸気の量が前記タービンに供給される高炉ガスの供給量に対して質量比で７％以下であることを特徴とする。 (6) Further, the amount of the injected steam is 7% or less by mass ratio with respect to the supply amount of the blast furnace gas supplied to the turbine.

したがって、注入した蒸気によって生成されたミスト（本発明において、液化した水からなる「微小水滴」をミストと称す）がタービン翼に衝突して、これに付着したダストを除去するから、発電と洗浄を同時に並行して実施することができる。また、注入した蒸気によって高炉ガスの温度が上昇するから、タービンによる回収エネルギー量が向上する。   Therefore, the mist generated by the injected steam (in the present invention, “micro water droplets” consisting of liquefied water is referred to as mist) collides with the turbine blade and removes the dust adhering to it, so power generation and cleaning Can be performed simultaneously in parallel. Further, since the temperature of the blast furnace gas is increased by the injected steam, the amount of energy recovered by the turbine is improved.

図１は本発明の実施形態に係る高炉炉頂圧発電設備の構成を示す模式図である。
図１において、高炉炉頂圧発電設備１は、図示しない高炉に接続され、高炉から排出された高炉ガスをタービン３に供給するための高炉ガス配管２と、高炉ガス配管２に接続され、高炉ガスによって回転されるタービン３と、タービン３の回転駆動軸３１に連結された回転従動軸４１を具備する発電機４と、タービン３に接続され、図示しないガスホルダー（各需要先に燃料ガスとして供給するために高炉ガスを蓄えている）に至る第２の高炉ガス配管５と、高炉ガス配管２に設けられ、高炉ガスに蒸気を注入（噴霧に同じ）するための蒸気注入手段６とを有している。 FIG. 1 is a schematic diagram showing a configuration of a blast furnace top pressure power generation facility according to an embodiment of the present invention.
In FIG. 1, a blast furnace top pressure power generation facility 1 is connected to a blast furnace (not shown), connected to a blast furnace gas pipe 2 for supplying blast furnace gas discharged from the blast furnace to a turbine 3, and a blast furnace gas pipe 2. A turbine 3 rotated by gas, a generator 4 having a rotary driven shaft 41 coupled to a rotary drive shaft 31 of the turbine 3, and a gas holder (not shown) as a fuel gas connected to the turbine 3 (not shown) A second blast furnace gas pipe 5 (which stores blast furnace gas for supply), and a steam injection means 6 provided in the blast furnace gas pipe 2 for injecting steam into the blast furnace gas (same as spraying). Have.

なお、蒸気注入手段６には、図示しない蒸気発生源（たとえば、転炉ボイラー、焼結ボイラー等）から蒸気を受け入れるための蒸気配管７が接続され、流量調整装置および噴霧ノズルが設置されている。
また、高炉ガス配管２の途中には湿式集塵機８が設置されている。したがって、湿式集塵機８において、高炉ガスに含まれたダストは略除去され、同時に、高炉ガスの温度は低下し、且つ湿度が高くなっている（たとえば、蒸気が略飽和している）。
図中、２１、２２および２３は、それぞれ流量調整弁、緊急遮断弁および調速弁である。 The steam injection means 6 is connected with a steam pipe 7 for receiving steam from a steam generation source (not shown) (for example, a converter boiler, a sintered boiler, etc.), and a flow rate adjusting device and a spray nozzle are installed. .
A wet dust collector 8 is installed in the middle of the blast furnace gas pipe 2. Therefore, in the wet dust collector 8, the dust contained in the blast furnace gas is substantially removed, and at the same time, the temperature of the blast furnace gas is decreased and the humidity is increased (for example, the steam is substantially saturated).
In the figure, 21, 22 and 23 are a flow rate adjusting valve, an emergency shut-off valve and a governing valve, respectively.

高炉から排出された高炉ガスの温度は２００℃程度であったものが、湿式集塵機８を通過した後は、略６０℃に降下して圧力は２．０〜２．５ｋｇ／ｃｍ2程度になり、蒸気は略飽和している（湿度が略１００％に同じ）。
一方、製鉄所内における一般的なプロセス用蒸気（例えば、転炉ボイラー、焼結ボイラー等から発生する）の温度は２００℃程度、圧力は１０ｋｇ／ｃｍ2程度である。 Although the temperature of the blast furnace gas discharged from the blast furnace was about 200 ° C., after passing through the wet dust collector 8, it dropped to about 60 ° C. and the pressure became about 2.0 to 2.5 kg / cm 2. The vapor is almost saturated (humidity is about 100%).
On the other hand, the temperature of a general process steam (for example, generated from a converter boiler, a sintered boiler, etc.) in an ironworks is about 200 ° C., and the pressure is about 10 kg / cm 2 .

したがって、前記プロセス用蒸気を前記高炉ガス中に噴霧すると、該蒸気の圧力が低下する（たとえば、１０ｋｇ／ｃｍ2から３ｋｇ／ｃｍ2に低下する）と同時に、温度が低下する（たとえば、略１３０℃以下に低下する）。
このとき、３ｋｇ／ｃｍ2における飽和蒸気温度は１３３℃であるから、噴霧した蒸気は高炉ガス配管２内において湿り蒸気となってミスト（液化した水からなる微小水滴）が生成される。よって、該ミストがタービン３の翼３２（回転翼（動翼）３２ｒと固定翼（静翼）３２ｓとをまとめて翼３２と総称する）に衝突するから、翼３２に付着したダストが除去されるという効果を奏する。
なお、高炉ガスが略飽和しているため、前記蒸気の噴霧をしない場合であっても、タービン３の後段においてはミストが発生する。よって、前記蒸気の噴霧によるミストは、特にタービン３の前段に配置された翼３２の洗浄に有効であるといえる。
一方、高炉ガスは、蒸気の潜熱およびミスト生成時（蒸気から水への相変化）に放出される気化熱によって加熱されるから、タービン３に供給される時点およびタービン３内において温度が高くなり、タービン３による回収エネルギー量が向上するという効果を奏する。 Accordingly, when the process steam is sprayed into the blast furnace gas, the pressure of the steam decreases (for example, from 10 kg / cm 2 to 3 kg / cm 2 ) and at the same time the temperature decreases (for example, approximately 130). ℃ below).
At this time, since the saturated steam temperature at 3 kg / cm 2 is 133 ° C., the sprayed steam becomes wet steam in the blast furnace gas pipe 2 to generate mist (micro water droplets made of liquefied water). Therefore, since the mist collides with the blade 32 of the turbine 3 (rotary blade (moving blade) 32r and fixed blade (static blade) 32s are collectively referred to as the blade 32), the dust attached to the blade 32 is removed. There is an effect that.
Note that since the blast furnace gas is substantially saturated, mist is generated in the subsequent stage of the turbine 3 even when the steam is not sprayed. Therefore, it can be said that the mist generated by spraying the steam is particularly effective for cleaning the blades 32 arranged in the front stage of the turbine 3.
On the other hand, since the blast furnace gas is heated by the latent heat of steam and the vaporization heat released during mist generation (phase change from steam to water), the temperature of the blast furnace gas increases at the time when it is supplied to the turbine 3 and in the turbine 3. There is an effect that the amount of energy recovered by the turbine 3 is improved.

つまり、蒸気の有する熱エネルギーが電力に変換され、且つ、熱エネルギーを放出した後に生成されたミストの運動エネルギーが洗浄に供されるため、蒸気は有効に利用されると換言することができる。
なお、蒸気の注入は連続でも間歇でもよい。また、過剰にミストが発生した場合には、ミストによる翼表面の磨耗等が懸念されるため、蒸気の注入量をタービン３に供給される高炉ガスの供給量に対して質量比で７％以下、好ましくは２ないし５％程度に抑えるとよい。
さらに、蒸気注入手段６に、蒸気の性状を調整する蒸気調整装置を設け、注入する蒸気として好適な温度、圧力または乾き度に調整してもよい。 In other words, since the thermal energy of the steam is converted into electric power, and the kinetic energy of the mist generated after releasing the thermal energy is used for cleaning, it can be said that the steam is effectively used.
The injection of steam may be continuous or intermittent. Further, when mist is generated excessively, there is a concern about the blade surface being worn by the mist and the like, so the steam injection amount is 7% or less by mass ratio with respect to the supply amount of blast furnace gas supplied to the turbine 3. However, it is preferable to keep it at about 2 to 5%.
Furthermore, the steam injection means 6 may be provided with a steam adjusting device that adjusts the properties of the steam, and may be adjusted to a temperature, pressure, or dryness suitable for the steam to be injected.

本発明は以上の構成であるから、高炉炉頂圧発電設備のみならず、蒸気タービンを有する各種発電装置や回転装置、および各種発電装置や回転装置における蒸気タービンのタービン翼の洗浄方法に広く利用することができる。   Since the present invention has the above-described configuration, it is widely used not only for blast furnace top pressure power generation equipment but also for various power generation devices and rotating devices having a steam turbine, and for cleaning turbine blades of steam turbines in various power generating devices and rotating devices. can do.

本発明の実施形態に係る高炉炉頂圧発電設備の構成を示す模式図である。It is a schematic diagram which shows the structure of the blast furnace top pressure power generation equipment which concerns on embodiment of this invention.

符号の説明Explanation of symbols

１ 高炉炉頂圧発電設備
２ 高炉ガス配管
３ タービン
４ 発電機
５ 第２の高炉ガス配管
６ 蒸気注入手段
７ 蒸気配管
８ 湿式集塵機
DESCRIPTION OF SYMBOLS 1 Blast furnace top pressure power generation equipment 2 Blast furnace gas piping 3 Turbine 4 Generator 5 2nd blast furnace gas piping 6 Steam injection means 7 Steam piping 8 Wet dust collector

Claims (6)

高炉から排出された高炉ガスを後記タービンに供給するための高炉ガス配管と、
該高炉ガス配管に接続され、前記高炉ガスによって回転されるタービンと、
該タービンに連結された発電機と、
前記高炉ガス配管に設けられ、前記高炉ガスに蒸気を注入するための蒸気注入手段とを有し、
該蒸気注入手段から注入された蒸気によって生成されたミストが、前記タービンの翼に衝突して該翼に付着したダストを除去することを特徴とする高炉炉頂圧発電設備。 Blast furnace gas piping for supplying the blast furnace gas discharged from the blast furnace to the turbine described later,
A turbine connected to the blast furnace gas pipe and rotated by the blast furnace gas;
A generator coupled to the turbine;
Provided in the blast furnace gas piping, and having a steam injection means for injecting steam into the blast furnace gas,
A blast furnace top pressure power generation facility characterized in that mist generated by steam injected from the steam injection means collides with a blade of the turbine and removes dust adhering to the blade. 前記高炉ガス配管に湿式集塵機が設置され、前記高炉ガスが降温および加湿されることを特徴とする請求項１記載の高炉炉頂圧発電設備。   The blast furnace top pressure power generation facility according to claim 1, wherein a wet dust collector is installed in the blast furnace gas pipe, and the blast furnace gas is cooled and humidified. 前記注入される蒸気の量が前記タービンに供給される高炉ガスの供給量に対して質量比で７％以下であることを特徴とする請求項１または２記載の高炉炉頂圧発電設備。   The blast furnace top pressure power generation facility according to claim 1 or 2, wherein an amount of the injected steam is 7% or less by mass ratio with respect to a supply amount of blast furnace gas supplied to the turbine. 高炉から排出された高炉ガスを後記タービンに供給するための高炉ガス配管と、該高炉ガス配管に接続され、前記高炉ガスによって回転されるタービンと、該タービンに連結された発電機と、前記高炉ガス配管に設けられ、前記高炉ガスに蒸気を注入するための蒸気注入手段とを有す高炉炉頂圧発電設備において、
前記蒸気注入手段から蒸気を注入し、該注入した蒸気によって生成されたミストを前記タービンの翼に衝突させることによって、該翼に付着したダストを除去することを特徴とする、高炉炉頂圧発電設備におけるタービン翼の洗浄方法。 A blast furnace gas pipe for supplying blast furnace gas discharged from the blast furnace to a turbine described later, a turbine connected to the blast furnace gas pipe and rotated by the blast furnace gas, a generator connected to the turbine, and the blast furnace In a blast furnace top pressure power generation facility provided with gas piping and having steam injection means for injecting steam into the blast furnace gas,
Blast furnace top pressure power generation characterized in that dust attached to the blade is removed by injecting steam from the steam injection means and causing the mist generated by the injected steam to collide with the blade of the turbine. A method for cleaning turbine blades in equipment. 前記高炉ガスを、あらかじめ降温および加湿することを特徴とする請求項４記載の、高炉炉頂圧発電設備におけるタービン翼の洗浄方法。   The method for cleaning turbine blades in a blast furnace top pressure power generation facility according to claim 4, wherein the blast furnace gas is cooled and humidified in advance. 前記注入される蒸気の量が前記タービンに供給される高炉ガスの供給量に対して質量比で７％以下であることを特徴とする請求項４または５記載の、高炉炉頂圧発電設備におけるタービン翼の洗浄方法。
6. The blast furnace top pressure power generation facility according to claim 4, wherein an amount of the injected steam is 7% or less by mass ratio with respect to a supply amount of blast furnace gas supplied to the turbine. Turbine blade cleaning method.
JP2004019656A 2004-01-28 2004-01-28 Blast furnace top pressure power generation facility and turbine blade cleaning method in blast furnace top pressure power generation facility Expired - Fee Related JP4423983B2 (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012117498A (en) * 2010-12-03 2012-06-21 Mitsubishi Heavy Ind Ltd Electric power generation plant
JP2012211526A (en) * 2011-03-30 2012-11-01 Mitsui Eng & Shipbuild Co Ltd Device for preventing dust deposition on stator vane of furnace top-pressure recovery turbine
KR20190127114A (en) * 2018-05-03 2019-11-13 주식회사 포스코 Power generator using top gas pressure of blast furnace
CN114508387A (en) * 2021-12-16 2022-05-17 严强 Compressed gas pipeline power generation device

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012117498A (en) * 2010-12-03 2012-06-21 Mitsubishi Heavy Ind Ltd Electric power generation plant
JP2012211526A (en) * 2011-03-30 2012-11-01 Mitsui Eng & Shipbuild Co Ltd Device for preventing dust deposition on stator vane of furnace top-pressure recovery turbine
KR20190127114A (en) * 2018-05-03 2019-11-13 주식회사 포스코 Power generator using top gas pressure of blast furnace
KR102133907B1 (en) 2018-05-03 2020-07-14 주식회사 포스코 Power generator using top gas pressure of blast furnace
CN114508387A (en) * 2021-12-16 2022-05-17 严强 Compressed gas pipeline power generation device

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